01/27/2021

The new official website of Bojue Hydraulics is officially launched

Henan Bojue Hydraulic Technology Development Co., Ltd is a professional processing company which is focused on high-quality hydraulic hoses and hydraulic joints. And dedicate to the research, development, production of new products, Our company is located in the beautiful city-Luohe, Henan province, China. Total coverage is 15,000 square meters, with the registered capital of RMB 30 million, we provide various specifications of high-pressure steel wire braided hose, high-pressure steel wire spiral hose, high and low pressure hose assembly. And hydraulic joint/flanges, etc.

04/20/2021

Hydraulic hose industry information

Today, when science and technology change the way of productivity, the world's industrial production pattern is still undergoing tremendous changes. The downstream applications of hydraulic hoses are extensive and the technology is relatively mature. However, as a common product in the mechanical field, it is less likely to be eliminated by the alternative industry in the future. For the global hydraulic hose industry, the largest market share is led by several giants. With a market share of 9.61% in 2016, Parker is the leader in the hydraulic hose industry, followed by Manuli and Alfagomma. On the whole, there are a large number of companies involved in the hydraulic hose industry, and prices vary greatly depending on the downstream application areas. The main driving factor for the growth of the global hydraulic hose market is the growth in demand in the mining, agriculture, industrial and construction sectors. In 2016, the global hydraulic hose market value reached 1.5 billion U.S. dollars, and it is expected to continue to grow at a compound annual growth rate of 2.06% from 2017. At present, the industrial field is the largest market for hydraulic hoses. From the perspective of the industrial field, hydraulic hoses need to be able to adapt to the challenging environment and meet the requirements of the industrial field. Reliable hose products can prevent pipeline rupture and leakage and ensure the safety of workers. In addition, since the old hose has reached the end of its useful life, the replacement of the hose has also brought growth to the market. From the geographical perspective, the hydraulic hose market can be divided into North America, Europe, Asia-Pacific, Middle East, Africa and Latin America. In 2016, the European region accounted for the largest market share, which was mainly due to the development of the European industrial sector. The major manufacturers of hydraulic hoses have been innovating production to meet the increasingly diverse and personalized needs. They also focus on strengthening their distribution network to increase their share of the global market. According to statistics from the market research organization Qyresearch, the size of China's hydraulic hose market was around US$167 million by the end of 2016. The development of China is obvious to all, and the development of corresponding fields has driven the huge demand of the hydraulic hose industry. In the past few years, there have been more and more hydraulic hose design and production companies in China. Due to the price advantage, more and more Chinese companies are exporting their products abroad. In the next few years, hydraulic hose products will still serve the rapid development of society with more advanced technology and a wider range of applications, and industry competition will become more fierce. In the future, the core competitiveness of hydraulic hose manufacturers will still be technology. Breaking the industry monopoly of high-end products or occupying the market in specific application areas will be the top priority for leading the industry.

04/20/2021

Rubber hose use and related precautions

According to the national standard GB9576-88 "Guide for Selection, Storage, Use and Maintenance of Rubber, Plastic Hoses and Hoses Assemblies":

04/20/2021

Common bad phenomena in high-pressure tubing

1. Tube burst: pressure exceeding the pressure specification is applied The burst pipe after exceeding the withstand voltage range As a channel for transmitting pressure, the high-pressure hose must withstand the pressure of the internal liquid. Because it is the basic raw material of rubber, it is a short plate on the transmission system (although it is not as durable as a steel pipe, but it can bend), it is a consumable. Pressure is an important element of pipe selection. The mismatch between the peak pressure of the equipment and the working pressure of the high-pressure tubing will cause the risk of tube bursting, which will cause the equipment to stop and even cause safety hazards! And some brands of tubing with false standard pressure or unstable quality will greatly increase the explosion. Control the odds. 2. Tube burst: use of incompatible fluid (erosion) Inner rubber is corroded, corroded and cracked There are many types of fluids used according to actual conditions. There are general mineral oil, water glycol mineral oil for fire prevention and disaster prevention purposes, water, chemical fluids and so on. Different formulations of rubber in the inner layer of the hose are required to be able to resist the erosion of the corresponding fluid. When the tubing that is not resistant to the fluid meets the fluid, it is easy to cause the inner rubber to crack, and the fluid (especially the water) penetrates into the steel wire layer, which accelerates the deterioration of the steel wire layer for clad pressure, and in severe cases, the weak and localized parts of the tube burst. 3. Cracking/bursting: Excessive bending of the tubing specification value Excessive bending causes bending Most of the hoses move repeatedly with the operation of the equipment, which requires the hose to have good toughness. At the same time, the narrow equipment installation space also puts forward higher requirements on the bending radius of the hose. This is closely related to the rubber formula and the flexibility of the steel wire. Be sure to confirm the parameters of the tubing manufacturer and the bending resistance data report issued by the relevant manufacturer. Do not select the tubing at the moving part by hand. Unmatched tubing selection and regular spot inspections are not in place, and the outer rubber cracks and steel wire breaks are prone to occur in the areas where the bending stress is concentrated, and the pipe bursts. 4. Abrasion/pipe bursting: accelerated deterioration under unfavorable environments Excessive wear caused the outer layer of rubber to fall off, it must be replaced immediately Rubber products are generally afraid of ultraviolet rays, ozone, water, high temperature, and friction, all of which accelerate their aging and affect their service life. The equipment is inevitably in a high temperature and high humidity environment, and the outdoor storage of construction machinery has higher requirements for the hose rubber formula. Therefore, avoid friction, excessive bending, reduce bending frequency, avoid high temperature and humidity, and be stepped on.

04/20/2021

Internal structure of high pressure tubing

The rubber tubing is the blood vessel of the hydraulic system, which realizes the transmission of pressure while transporting fluid. In a broad sense, high-pressure hoses also include hoses that transport water, steam, chemical liquids, etc.

02/27/2021

How much do you know about the causes of high pressure hose damage

1. Poor manufacturing quality (1) The inner and outer layers of the high-pressure hose wall are made of oil-resistant rubber, and the middle is (2 to 4 layers) cross braided steel wire or wound steel wire. Poor quality hoses will appear: uneven wall thickness of the hose; too tight or too loose steel wire braiding or too few steel wire layers; large deformation (elongation, shortening or bending deformation) of the hose after pressure; outer rubber Poor air-tightness leads to steel wire corrosion; poor sealing of the inner layer glue makes the high-pressure oil easily enter the steel wire layer; insufficient adhesion between the glue layer and the steel wire layer. The above conditions will reduce the bearing capacity of the hose, and eventually burst at the weak point of the tube wall. (2) Improper selection of the crimping amount and crimping speed when assembling the hose and the joint, or the unreasonable selection of the structure, material, and size of the joint can cause the hose and the joint to be over-tightened or too loose, causing early damage to the joint. When assembling, if the crimping amount is too small, that is, when the pressure between the joint and the hose is too loose, the hose may come out of the joint at the beginning of use under the action of oil pressure; if the crimping amount is too large, the joint and the hose will be compressed. Too tight, it is easy to cause partial damage to the inner layer of the hose, causing cracks. High-pressure oil will directly enter the steel wire layer from the rupture, and then rush along the gap between the steel wires to the end of the jacket and spray out, or it will rush along the steel wire layer to a certain place and accumulate. , Make the outer layer of glue bulge or even break. When assembling the hose and the joint, if the crimping speed is too fast, it is easy to cause damage to the inner rubber and breakage of the steel wire layer, which will cause the hose to be damaged prematurely during use. In addition, unreasonable joint design and poor processing quality can also cause damage to the inner rubber; if the joint material is selected incorrectly, it is easy to deform during the crimping process, which will affect the crimping quality and shorten the life of the hose. 2. Improper use On the premise that the quality is guaranteed, if used improperly, the service life of the hose will be greatly shortened. In actual work, most of the damage to the high-pressure hose is caused by improper use. (1) Subject to frequent and severe pressure shocks. The bursting of the high-pressure hose is generally not caused by too much static pressure, but is related to the severity and number of pressure shocks. When construction machinery is in operation, sudden increase or decrease of oil pressure in the oil pipe will occur repeatedly, which constitutes frequent pressure shocks on the oil pipe, resulting in increased damage to the oil seal of each part, blistering and rupture of the rubber pipe, and loosening and leakage of pipe joints. Leakage phenomenon. Therefore, during operation, the valve stem must not be pulled too hard, and must be gentle. (2) The use temperature of the oil is too high. When construction machinery is working, the hydraulic system heats up the oil due to power loss, and the influence of outside air temperature (especially in summer) can cause the oil temperature to rise sharply. The higher the temperature of the oil is, the more easily the bananas will age, the elasticity will deteriorate, the strength and sealing performance will decrease, and the hose will burst quickly. Therefore, during operation, when the hydraulic system temperature rises too high or too fast, the cause should be found out in time and eliminated; during summer operation, especially continuous operation, necessary cooling measures should be taken. (3) The hose selection and installation are unreasonable. When replacing the high-pressure hose, the length of the selected hose, the number of steel wires, the shape and size of the joint should be reasonable, and the degree of bending of the hose should be minimized; when tightening the joint nut, do not cause the hose to be twisted, excessive bending and Distortion will greatly reduce the service life of the hose; protective measures should be taken for some parts prone to friction to prevent the hose from bursting due to wear.