Fiber skeleton reinforced rubber diaphragm plate

Abstract

The utility model discloses a fiber skeleton reinforced rubber diaphragm plate which comprises a fiber skeleton reinforced layer and a rubber layer installed on the fiber skeleton reinforced layer in an attached mode, the rubber layer comprises an outer sealing rib, a U-shaped structure, a main body structure and an inner sealing rib, and the outer sealing rib and the inner sealing rib are both circular. The circular top end of the outer sealing rib is in smooth transition connection with the top end of one side groove wall of the U-shaped structure, the top end of the other side groove wall of the U-shaped structure is in smooth transition connection with the lower end of the body structure, and the upper end of the body structure is in smooth transition connection with the circular top end of the inner sealing rib. The fiber skeleton reinforced rubber diaphragm plate provided by the utility model has the characteristics of long service life, good service braking stability, high emergency braking sensitivity, safety and reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber sealing components, and more specifically, to a fiber skeleton reinforced rubber membrane plate. Background Art

[0002] my country's railway rolling stock all utilizes air brakes, which operate the train by controlling the compressed air pressure within the brake pipe. The Type 120 control valve relies on the pressure difference between the upper and lower surfaces of its diaphragm to generate up-and-down movement, controlling the brake to achieve vehicle braking. With the advancement of my country's railway rolling stock maintenance program and system reforms and the shift toward heavier freight, higher requirements have been placed on the service life and performance of the control valve diaphragms on railway freight cars. Furthermore, my country's railway freight cars operate in environments with significant temperature differences between north and south, requiring trains to operate normally in temperatures between -50°C and 70°C. Some lines also face thawing conditions during winter, requiring them to withstand temperatures of 110°C for three hours on multiple occasions. Therefore, the control valve diaphragms must exhibit excellent low-temperature resistance and thermal stability.

[0003] Existing control valve diaphragms are primarily made of natural rubber, which offers excellent low-temperature resistance and short-term performance. However, natural rubber diaphragms have poor thermal and oxidative aging resistance and insufficient oil resistance, making them prone to cracking and perforation. As natural rubber ages, its tensile and tear strengths rapidly decrease, making it susceptible to fatigue and perforation. These factors can cause brake valve failures, impacting driving safety and order.

[0004] The function of the 120-type air control valve emergency valve is to accelerate the exhaust of the train pipe during emergency braking (emergency local reduction function), making the emergency braking function reliable, improving the emergency braking sensitivity, and thus increasing the braking wave speed. However, during normal braking and brake stability tests, the 120 emergency valve must not have an emergency braking function and must have good stability performance. The 120 emergency valve must be tested on the 120 valve test bench (705 test bench) before leaving the factory or being installed on the train, mainly to examine the emergency sensitivity and stability performance of the valve body. According to technical documents, the 120 emergency valve should be regularly tested for environmental performance at -50°C, +70°C, etc. using a truck single-vehicle tester, also to examine the emergency sensitivity and stability performance of the valve body. The 120 emergency valve rubber diaphragm has the greatest impact on the above-mentioned inspections and tests. 120 emergency valves equipped with existing natural rubber diaphragms occasionally fail inspections.

[0005] Figure 1The 120 emergency valve has an S-shaped rubber diaphragm. The outer edge of the emergency valve rubber diaphragm is pressed against the emergency valve body by the emergency valve cover. The upper chamber of the emergency piston communicates with the emergency chamber in the intermediate body via a hidden passage and a through-hole on the mounting surface. The lower chamber of the emergency piston (the stabilizing spring chamber) communicates with the brake pipe. The 120 emergency valve utilizes the pressure difference between the upper and lower sides of the emergency piston (i.e., the emergency chamber and the brake pipe) to control the operation of the pilot valve and the bleed valve, producing an emergency partial pressure relief effect. When emergency braking occurs, the pressure below the emergency valve diaphragm decreases. Once a sufficient pressure differential is established on both sides, the diaphragm drives the emergency piston rod downward, first pushing open the pilot valve and then the bleed valve via the push rod, achieving the purpose of emergency partial pressure relief. At this time, the emergency valve diaphragm is subjected to significant radial tension, and stress concentration is prone to occur at the transition connection between the lower side of the diaphragm and its external sealing rib, which may even cause the diaphragm to perforate or rupture, rendering the emergency valve ineffective.

[0006] Therefore, it is necessary to solve the above technical problems. Utility Model Content

[0007] In view of this, the purpose of the present invention is to provide a fiber skeleton reinforced rubber diaphragm with the characteristics of long service life, good stability in normal braking, high sensitivity in emergency braking and safety and reliability.

[0008] Based on the above-mentioned purpose, the utility model provides a fiber skeleton reinforced rubber membrane plate, including a fiber skeleton reinforcement layer and a rubber layer fitted on the fiber skeleton reinforcement layer, the rubber layer including an outer sealing rib, a U-shaped structure, a main body structure and an inner sealing rib, the outer sealing rib and the inner sealing rib are both circular, the circular top of the outer sealing rib is smoothly transitioned to the top of the groove wall on one side of the U-shaped structure, the top of the groove wall on the other side of the U-shaped structure is smoothly transitioned to the lower end of the main body structure, and the upper end of the main body structure is smoothly transitioned to the circular top of the inner sealing rib.

[0009] Optionally, the fiber skeleton reinforcement layer is a high-elastic fiber skeleton reinforcement layer, and the high-elastic fiber skeleton reinforcement layer is woven with one or two of polyester, nylon, and spandex.

[0010] Optionally, the rubber layer is made of one of nitrile rubber, hydrogenated nitrile rubber, chloroprene rubber and natural rubber.

[0011] Optionally, the groove depth of the U-shaped structure is 7.0 mm to 12.0 mm.

[0012] Optionally, the height of the main structure is 5.0 mm to 10.0 mm.

[0013] The fiber skeleton reinforced rubber diaphragm provided by the utility model includes a fiber skeleton reinforced layer and a rubber layer fitted on the fiber skeleton reinforced layer, the rubber layer includes an outer sealing rib, a U-shaped structure, a main structure and an inner sealing rib, and the circular top end of the outer sealing rib is smoothly transitioned to the top end of the groove wall on one side of the U-shaped structure, the top end of the groove wall on the other side of the U-shaped structure is smoothly transitioned to the lower end of the main structure, and the upper end of the main structure is smoothly transitioned to the circular top end of the inner sealing rib, thereby effectively enhancing the flexural fatigue resistance of the fiber skeleton reinforced rubber diaphragm and improving the deformation resistance of the fiber skeleton reinforced rubber diaphragm, so that the fiber skeleton reinforced rubber diaphragm has the characteristics of long service life, good stability in normal braking, high sensitivity in emergency braking and safety and reliability, thereby ensuring the reliability of the 120 emergency valve and the safety of driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the objects and advantages of the present invention.

[0015] Figure 1 Schematic diagram of the cross-sectional structure of a rubber membrane in the prior art;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of a fiber skeleton reinforced rubber membrane according to an embodiment of the present invention;

[0017] Figure 3 A side view of a fiber skeleton reinforced rubber membrane according to an embodiment of the present invention;

[0018] Figure 4 This is a top view of a fiber skeleton reinforced rubber membrane according to an embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 1: Rubber layer; 2: Fiber skeleton reinforcement layer; 3: External sealing rib; 4: U-shaped structure; 5: Main structure; 6: Internal sealing rib. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the following embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0022] like Figure 2 、 Figure 3 and Figure 4As shown, the fiber skeleton reinforced rubber membrane provided by the utility model includes a fiber skeleton reinforcement layer 2 and a rubber layer 1 fitted on the fiber skeleton reinforcement layer 2, the rubber layer 1 includes an outer sealing rib 3, a U-shaped structure 4, a main body structure 5 and an inner sealing rib 6, the outer sealing rib 3 and the inner sealing rib 6 are both circular, the circular top of the outer sealing rib 3 is smoothly transitioned to the top of the groove wall on one side of the U-shaped structure 4, the top of the groove wall on the other side of the U-shaped structure 4 is smoothly transitioned to the lower end of the main body structure 5, and the upper end of the main body structure 5 is smoothly transitioned to the circular top of the inner sealing rib 6.

[0023] The fiber skeleton reinforced rubber diaphragm provided by the utility model includes a fiber skeleton reinforced layer 2 and a rubber layer 1 fitted on the fiber skeleton reinforced layer 2, the rubber layer 1 includes an outer sealing rib 3, a U-shaped structure 4, a main structure 5 and an inner sealing rib 6. By smoothly transitioning the circular top of the outer sealing rib 3 to the top of the groove wall on one side of the U-shaped structure 4, smoothly transitioning the top of the groove wall on the other side of the U-shaped structure 4 to the lower end of the main structure 5, and smoothly transitioning the upper end of the main structure 5 to the circular top of the inner sealing rib 6, the flexural fatigue resistance of the fiber skeleton reinforced rubber diaphragm is effectively enhanced, and the deformation resistance of the fiber skeleton reinforced rubber diaphragm is improved, so that the fiber skeleton reinforced rubber diaphragm has the characteristics of long service life, good stability in normal braking, high sensitivity in emergency braking and safety and reliability, thereby ensuring the reliability of the 120 emergency valve and the safety of driving.

[0024] In one embodiment of the present invention, the fiber skeleton reinforcement layer 2 is a high-elastic fiber skeleton reinforcement layer 2, which is woven with one or two of polyester, nylon, and spandex, thereby improving the convenience of producing the fiber skeleton reinforced rubber membrane plate.

[0025] In one embodiment of the present invention, the rubber layer 1 is made of one of nitrile rubber, hydrogenated nitrile rubber, chloroprene rubber and natural rubber, which improves the convenience of producing the fiber skeleton reinforced rubber membrane.

[0026] In one embodiment of the present invention, the groove depth of the U-shaped structure 4 is 7.0 mm to 12.0 mm. The U-shaped structure 4 of this depth can be better adapted for use with the 120 emergency valve, thereby improving the ease of use of the fiber skeleton reinforced rubber diaphragm.

[0027] In one embodiment of the present invention, the height of the main structure 5 is 5.0 mm to 10.0 mm. The main structure 5 of this depth can be better adapted for use with the 120 emergency valve, thereby improving the ease of use of the fiber skeleton reinforced rubber diaphragm.

[0028] In one embodiment of the present invention, the high-elastic fiber skeleton reinforced layer 2 is impregnated with a tackifier and dried before use. This improves the adhesion between the high-elastic fiber skeleton reinforced layer 2 and the rubber layer 1 and enhances the wear resistance of the inner side of the fiber skeleton reinforced rubber diaphragm. In actual application, the tackifier used in the present invention is a mixture of 15 parts by mass of chloroprene rubber, 1 part of stearic acid, 5 parts of carbon black, 3 parts of white carbon black, 1 part of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 1 part of resorcinol, 0.5 parts of vinyl triethoxysilane, and 100 parts of ethyl acetate. By utilizing a rubber / fiber composite material to create a diaphragm, the present invention effectively enhances flex fatigue resistance, aging resistance, and oil resistance, and improves the tensile strength, tear strength, and deformation resistance of the fiber skeleton reinforced rubber diaphragm, thereby ensuring the normal braking stability, emergency braking sensitivity, and driving safety of the 120 emergency valve.

[0029] The fiber skeleton reinforced rubber diaphragm provided by the utility model includes a fiber skeleton reinforced layer 2 and a rubber layer 1 fitted on the fiber skeleton reinforced layer 2, the rubber layer 1 includes an outer sealing rib 3, a U-shaped structure 4, a main structure 5 and an inner sealing rib 6. By smoothly transitioning the circular top of the outer sealing rib 3 to the top of the groove wall on one side of the U-shaped structure 4, smoothly transitioning the top of the groove wall on the other side of the U-shaped structure 4 to the lower end of the main structure 5, and smoothly transitioning the upper end of the main structure 5 to the circular top of the inner sealing rib 6, the flexural fatigue resistance of the fiber skeleton reinforced rubber diaphragm is effectively enhanced, and the deformation resistance of the fiber skeleton reinforced rubber diaphragm is improved, so that the fiber skeleton reinforced rubber diaphragm has the characteristics of long service life, good stability in normal braking, high sensitivity in emergency braking and safety and reliability, thereby ensuring the reliability of the 120 emergency valve and the safety of driving.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A fiber skeleton reinforced rubber membrane, characterized in that: It includes a fiber skeleton reinforcement layer and a rubber layer fitted on the fiber skeleton reinforcement layer, the rubber layer includes an outer sealing rib, a U-shaped structure, a main structure and an inner sealing rib, the outer sealing rib and the inner sealing rib are both circular, the circular top of the outer sealing rib is smoothly connected to the top of the groove wall on one side of the U-shaped structure, the top of the groove wall on the other side of the U-shaped structure is smoothly connected to the lower end of the main structure, and the upper end of the main structure is smoothly connected to the circular top of the inner sealing rib.

2. The fiber skeleton reinforced rubber membrane according to claim 1, characterized in that: The fiber skeleton reinforcement layer is a high-elastic fiber skeleton reinforcement layer, and the high-elastic fiber skeleton reinforcement layer is woven with one or two of polyester, nylon and spandex.

3. The fiber skeleton reinforced rubber membrane according to claim 1, characterized in that: The rubber layer is made of one of nitrile rubber, hydrogenated nitrile rubber, chloroprene rubber and natural rubber.

4. The fiber skeleton reinforced rubber membrane according to claim 1, characterized in that: The groove depth of the U-shaped structure is 7.0 mm to 12.0 mm.

5. The fiber skeleton reinforced rubber membrane according to claim 1, characterized in that , the height of the main structure is 5.0mm~10.0mm.

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