Low-temperature-resistant constant pressure valve for automatic anti-slip system of railway vehicle

Abstract

The utility model relates to the technical field of constant pressure valves, and discloses a low-temperature-resistant constant pressure valve for an automatic anti-slip system of a railway vehicle, which comprises a constant pressure valve main body, two sides of the constant pressure valve main body are fixedly connected with telescopic pipes through clamping and locking mechanisms, and the other ends of the telescopic pipes are fixedly connected with connecting pipes through flange plates. A compensation mechanism is arranged between the connecting pipe and the telescopic pipe, the clamping and locking mechanism comprises first connecting discs installed on the two sides of the constant pressure valve body and a second connecting disc installed on the side, away from the connecting pipe, of the telescopic pipe, a clamping plate is fixedly connected to one side of each first connecting disc, and multiple sets of elastic locking rods are arranged in each clamping plate. According to the device, the constant pressure valve body and the telescopic pipe can be rapidly and fixedly connected through the clamping and locking mechanism, so that great convenience is brought to mounting and dismounting of the constant pressure valve body by operators, and the maintenance and replacement efficiency of the constant pressure valve body by maintenance personnel is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure regulating valve technology, specifically a low-temperature pressure regulating valve for an automatic anti-runaway system for railway vehicles. Background Technology

[0002] Valves are control components in fluid transport systems, with functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief. For constant pressure valves, when the gas pressure is higher than the valve core opening pressure, the valve core opens, allowing the air passage to connect. When the gas pressure is lower than the valve core opening pressure, the valve core closes, cutting off the air passage. Currently, railway vehicles typically stop using air brakes. However, due to the poor sealing of the brake air ducts that generate the air brakes, the air pressure in the brake air ducts decreases after the vehicle has been stopped for a period of time, resulting in poor braking performance and increasing the risk of runaway accidents. Therefore, constant pressure valves are often used in automatic anti-runaway systems for railway vehicles to maintain constant pressure.

[0003] However, existing pressure regulating valves are generally fixed with bolts and flanges when connected to the connecting pipe. This traditional fixing method is time-consuming and labor-intensive, which seriously affects the installation and disassembly efficiency of the pressure regulating valve. In addition, the pipeline will shrink in low temperature environment, which can easily affect the sealing between the pressure regulating valve and the pipeline. Utility Model Content

[0004] The purpose of this invention is to provide a low-temperature resistant constant pressure valve for an automatic anti-runaway system for railway vehicles, which solves the problems mentioned in the background art.

[0005] This application provides a low-temperature resistant constant pressure valve for an automatic anti-runaway system for railway vehicles, including a constant pressure valve body. Both sides of the constant pressure valve body are fixedly connected to telescopic pipes through locking mechanisms. The other end of the telescopic pipe is fixedly connected to a connecting pipe through a flange. A compensation mechanism is provided between the connecting pipe and the telescopic pipe.

[0006] By adopting the above technical solution, this device can better perform constant pressure treatment at low temperatures, thereby greatly improving the practicality of the device.

[0007] Optionally, the locking mechanism includes a first connecting plate installed on both sides of the pressure regulating valve body and a second connecting plate installed on the side of the telescopic tube away from the connecting tube. A locking plate is fixedly connected to one side of the first connecting plate, and multiple sets of elastic locking rods are provided inside the locking plate. A locking groove is opened inside the second connecting plate, and multiple locking holes are opened on one side of the locking groove.

[0008] By adopting the above technical solution, this device can quickly fix the pressure regulating valve body and the telescopic pipe through the locking mechanism, which greatly facilitates the installation and disassembly of the pressure regulating valve body by the operator, and thus greatly improves the maintenance and replacement efficiency of the pressure regulating valve body by the maintenance personnel.

[0009] Optionally, the compensation mechanism includes a fixing ring installed on the outer surface of the connecting pipe, a hollow gas column fixedly connected to one side of the fixing ring, a sealing plate movably connected inside the hollow gas column, a pull rod fixedly connected to one side of the sealing plate, and the other end of the pull rod extending to the outside of the hollow gas column and fixedly connected to the flange.

[0010] By adopting the above technical solution, the device can automatically stretch the telescopic pipe through the compensation mechanism at low temperatures, thereby avoiding the reduction of the sealing performance between the pressure regulating valve body and the connecting pipe due to pipe shrinkage, and thus greatly improving the sealing performance of the device.

[0011] Optionally, the elastic locking rod includes a locking outer rod, a locking spring is fixedly connected to the bottom of the inner cavity of the locking outer rod, and a locking inner rod is fixedly connected to the top of the locking spring.

[0012] By adopting the above technical solution and utilizing the elasticity of the locking spring, the locking effect of this device is improved.

[0013] Optionally, hydrogen gas may be disposed inside the hollow gas column.

[0014] By adopting the above technical solution, since the volume of hydrogen is affected by temperature changes much more than the volume of air, a pressure difference will be better formed inside and outside the hollow gas column at low temperatures.

[0015] Optionally, a protective sleeve is provided on the outer surface of the pressure regulating valve body, and the inside of the protective sleeve is provided with fluororubber material.

[0016] By adopting the above technical solution, fluororubber, which has good elasticity and low temperature resistance, can protect the main body of the pressure regulating valve and ensure stable operation at low temperatures for a long time.

[0017] Optionally, sealing rings are fixedly connected to the inner walls of both the first and second connecting discs.

[0018] By adopting the above technical solution, the sealing performance of this device can be enhanced by using a sealing ring.

[0019] Optionally, the card plate and the card slot are adapted to each other and are both arc-shaped structures.

[0020] By adopting the above technical solution and utilizing the compatible arc structure, a tighter connection can be made between the pressure regulating valve body and the telescopic pipe.

[0021] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0022] 1. The technical solution of this application, by setting a first connecting plate, a second connecting plate, a locking plate, an elastic locking rod, a locking outer rod, a locking inner rod, a locking spring, a locking groove, and a locking slot, enables the device to quickly fix the pressure regulating valve body and the telescopic pipe through the locking mechanism, thereby greatly facilitating the installation and disassembly of the pressure regulating valve body by the operator, and thus greatly improving the efficiency of maintenance personnel in the maintenance and replacement of the pressure regulating valve body.

[0023] 2. The technical solution of this application, by setting a fixed ring, a hollow gas column, a sealing plate, a tie rod and a telescopic tube, enables the device to automatically stretch the telescopic tube through a compensation mechanism at low temperatures, thereby avoiding the reduction of the sealing performance between the pressure regulating valve body and the connecting pipe due to pipeline retraction, and thus greatly improving the sealing performance of the device. Attached Figure Description

[0024] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 This is a three-dimensional structural diagram of a low-temperature resistant constant pressure valve for an automatic anti-runaway system for railway vehicles according to this utility model.

[0026] Figure 2 This is a three-dimensional structural diagram of the second connecting plate in a low-temperature resistant constant pressure valve for an automatic anti-runaway system for railway vehicles according to this utility model;

[0027] Figure 3 This is a three-dimensional structural diagram of the first connecting plate in a low-temperature resistant constant pressure valve for an automatic anti-runaway system for railway vehicles according to this utility model;

[0028] Figure 4 This is a cross-sectional view of the interior of the elastic locking rod in a low-temperature resistant constant pressure valve for an automatic anti-runaway system for railway vehicles according to this utility model.

[0029] Figure 5 This is a cross-sectional view of the interior of the hollow gas column in a low-temperature resistant constant pressure valve for an automatic anti-runaway system for railway vehicles according to this utility model.

[0030] In the diagram: 1. Pressure regulating valve body; 2. Telescopic pipe; 3. Flange; 4. Connecting pipe; 5. First connecting plate; 6. Second connecting plate; 7. Clamping plate; 8. Elastic locking rod; 801. Locking outer rod; 802. Locking spring; 803. Locking inner rod; 9. Slot; 10. Locking hole; 11. Fixing ring; 12. Hollow gas column; 13. Sealing plate; 14. Pull rod. Detailed Implementation

[0031] Please see Figure 1-5 This utility model provides a technical solution: a low-temperature resistant constant pressure valve for an automatic anti-runaway system for railway vehicles, including a constant pressure valve body 1, with telescopic pipes 2 fixedly connected to both sides of the constant pressure valve body 1 by a locking mechanism, and a connecting pipe 4 fixedly connected to the other end of the telescopic pipe 2 by a flange 3, and a compensation mechanism provided between the connecting pipe 4 and the telescopic pipe 2.

[0032] By adopting the above technical solution, this device can better perform constant pressure treatment at low temperatures, thereby greatly improving the practicality of the device.

[0033] In the embodiments of this application, such as Figure 2-3 As shown, the locking mechanism includes a first connecting plate 5 installed on both sides of the pressure regulating valve body 1 and a second connecting plate 6 installed on the side of the telescopic pipe 2 away from the connecting pipe 4. A locking plate 7 is fixedly connected to one side of the first connecting plate 5. Multiple sets of elastic locking rods 8 are provided inside the locking plate 7. A locking groove 9 is opened inside the second connecting plate 6. Multiple locking holes 10 are opened on one side of the locking groove 9.

[0034] By adopting the above technical solution, the device can quickly fix the pressure regulating valve body 1 and the telescopic pipe 2 through the locking mechanism, which greatly facilitates the installation and disassembly of the pressure regulating valve body 1 by the operator, and thus greatly improves the maintenance and replacement efficiency of the pressure regulating valve body 1 by the maintenance personnel.

[0035] In the embodiments of this application, such as Figure 1 and Figure 5 As shown, the compensation mechanism includes a fixing ring 11 installed on the outer surface of the connecting pipe 4. A hollow gas column 12 is fixedly connected to one side of the fixing ring 11. A sealing plate 13 is movably connected inside the hollow gas column 12. A pull rod 14 is fixedly connected to one side of the sealing plate 13. The other end of the pull rod 14 extends to the outside of the hollow gas column 12 and is fixedly connected to the flange 3.

[0036] By adopting the above technical solution, the device can automatically stretch the telescopic pipe 2 through the compensation mechanism at low temperatures, thereby avoiding the reduction of the sealing performance between the pressure regulating valve body 1 and the connecting pipe 4 due to pipe shrinkage, and thus greatly improving the sealing performance of the device.

[0037] In the embodiments of this application, such as Figure 4 As shown, the elastic locking rod 8 includes a locking outer rod 801, a locking spring 802 is fixedly connected to the bottom of the inner cavity of the locking outer rod 801, and a locking inner rod 803 is fixedly connected to the top of the locking spring 802.

[0038] By adopting the above technical solution and utilizing the elastic effect of the locking spring 802, the locking effect of this device is improved.

[0039] In the embodiments of this application, such as Figure 5 As shown, hydrogen gas is placed inside the hollow gas column 12.

[0040] By adopting the above technical solution, since the volume of hydrogen is affected by temperature changes much more than the volume of air, the hollow gas column 12 will form a better pressure difference between the inside and outside at low temperatures.

[0041] In the embodiments of this application, such as Figure 1 As shown, a protective sleeve is provided on the outer surface of the pressure regulating valve body 1, and the inside of the protective sleeve is lined with fluororubber material.

[0042] By adopting the above technical solution, fluororubber, which has good elasticity and low temperature resistance, can protect the main body 1 of the pressure regulating valve from operating stably at low temperatures for a long time.

[0043] In the embodiments of this application, such as Figure 2-3 As shown, sealing rings are fixedly connected to the inner walls of both the first connecting plate 5 and the second connecting plate 6.

[0044] By adopting the above technical solution, the sealing performance of this device can be enhanced by using a sealing ring.

[0045] In the embodiments of this application, such as Figure 2-3 As shown, the card plate 7 and the card slot 9 are compatible and both have an arc-shaped structure.

[0046] By adopting the above technical solution and utilizing the compatible arc structure, a tighter connection can be made between the pressure regulating valve body 1 and the telescopic pipe 2.

[0047] In use, the operator can first press the locking inner rod 803, causing it to enter the locking outer rod 801 through the compression locking spring 802. Then, the clamping plate 7 on the outer surface of the first connecting plate 5 is inserted into the groove 9 on the outer surface of the second connecting plate 6. When the clamping plate 7 moves the locking inner rod 803 to the locking hole 10, the locking inner rod 803 will quickly pop out from the locking hole 10 under the elastic action of the locking spring 802, thus quickly fixing the first connecting plate 5 and the second connecting plate 6. Since the clamping plate 7 and the groove 9 are compatible, the pressure regulating valve body 1 and the telescopic tube 2 are locked together. The valve body 1 can be tightly connected, and similarly, operators can quickly disassemble the pressure regulating valve body 1, thereby greatly improving the efficiency of maintenance and replacement of the pressure regulating valve body 1. In low temperature environments, the hydrogen inside the hollow gas column 12 will contract due to the decrease in temperature. At this time, the gas pressure inside the hollow gas column 12 will decrease accordingly, which allows the sealing plate 13 to drive the pull rod 14 to stretch the telescopic tube 2 under atmospheric pressure. This can prevent the reduction of the sealing performance between the pressure regulating valve body 1 and the connecting pipe 4 due to pipe retraction, thereby greatly improving the sealing performance of this device.

Claims

1. A low-temperature-resistant constant pressure valve for an automatic anti-rolling system of a railway vehicle, comprising a constant pressure valve main body (1), characterized in that: Both sides of the constant pressure valve body (1) are fixedly connected with telescopic pipes (2) through clamping mechanisms, one end of each telescopic pipe (2) is fixedly connected with a connecting pipe (4) through a flange plate (3), and a compensation mechanism is arranged between the connecting pipe (4) and the telescopic pipe (2).

2. The low temperature resistant pressure maintaining valve for an automatic anti-rolling system of a railway vehicle according to claim 1, characterized in that: The clamping mechanism comprises first connecting plates (5) arranged on both sides of the constant pressure valve body (1) and second connecting plates (6) arranged on the sides of the telescopic pipes (2) away from the connecting pipe (4), one side of each first connecting plate (5) is fixedly connected with a clamping plate (7), the inside of each clamping plate (7) is provided with a plurality of elastic locking rods (8), the inside of each second connecting plate (6) is provided with a clamping groove (9), and a plurality of locking holes (10) are formed in one side of each clamping groove (9).

3. The low temperature resistant pressure maintaining valve for an automatic anti-rolling system of a railway vehicle according to claim 1, characterized in that: The compensation mechanism comprises a fixing ring (11) arranged on the outer surface of the connecting pipe (4), one side of the fixing ring (11) is fixedly connected with a hollow gas column (12), the inside of the hollow gas column (12) is movably connected with a sealing plate (13), one side of the sealing plate (13) is fixedly connected with a pull rod (14), and the other end of the pull rod (14) extends to the outside of the hollow gas column (12) and is fixedly connected with the flange plate (3).

4. The low temperature resistant pressure maintaining valve for an automatic anti-rolling system of a railway vehicle according to claim 2, characterized in that: The elastic locking rod (8) comprises a locking outer rod (801), the bottom of the inner cavity of the locking outer rod (801) is fixedly connected with a locking spring (802), and the top of the locking spring (802) is fixedly connected with a locking inner rod (803).

5. The low temperature resistant pressure maintaining valve for an automatic anti-rolling system of a railway vehicle according to claim 3, characterized in that: The inside of the hollow gas column (12) is provided with hydrogen.

6. The low temperature resistant pressure maintaining valve for an automatic anti-rolling system of a railway vehicle according to claim 1, characterized in that: The outer surface of the constant pressure valve body (1) is provided with a protective sleeve, and the inside of the protective sleeve is provided with a fluororubber material.

7. The low temperature resistant pressure maintaining valve for an automatic anti-rolling system of a railway vehicle according to claim 2, characterized in that: The inner walls of the first connecting plates (5) and the second connecting plates (6) are fixedly connected with sealing rings.

8. The low temperature resistant pressure maintaining valve for an automatic anti-rolling system of a railway vehicle according to claim 2, characterized in that: The clamping plate (7) and the clamping groove (9) are matched with each other and are both in arc-shaped structures.

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