Pressure limiting valve seat, pressure limiting valve assembly, valve group module and air braking system

Abstract

The invention discloses a pressure-limiting valve seat, a pressure-limiting valve assembly, a valve group module and an air braking system. The pressure-limiting valve seat comprises a valve seat base body, and the valve seat base body is provided with a first valve cavity, a second valve cavity and a third valve cavity which are independent of one another; the brake cylinder interface and the sensing valve lower cavity interface are communicated with the first valve cavity, the pressure reduction air cylinder interface and the sensing valve upper cavity interface are communicated with the second valve cavity, and the control valve interface is communicated with the third valve cavity; the valve seat base body is further provided with a pressure limiting valve connector used for being connected with a pressure limiting valve, and the pressure limiting valve connector communicates with the first valve cavity, the second valve cavity and the third valve cavity in a one-to-one correspondence mode. The brake cylinder connector, the sensing valve lower cavity connector and one of the pressure limiting valve connectors communicate with the first valve cavity, so that when a corresponding valve port of the pressure limiting valve communicates with the pressure limiting valve connector, the pressure limiting valve can communicate with the brake cylinder connector and the sensing valve lower cavity connector at the same time through the first valve cavity; therefore, the pressure limiting valve can be communicated with the brake cylinder and the sensing valve lower cavity of the sensing valve at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of air brake systems, and more specifically, to a pressure limiting valve seat, a pressure limiting valve assembly, a valve group module, and an air brake system. Background Art

[0002] The braking system of a train is an important guarantee for the train to decelerate, stop, park, or prevent the train from accelerating, ensuring the safety of train operation, and is also a necessary condition for improving the railway transportation capacity (including train operation speed and traction weight). The braking system mainly includes three parts: an air brake system, a basic braking device, and a manual brake. Among them, the air brake system uses compressed air as the braking power source to perform relevant operations and control the brake, generates and outputs the braking power source by changing the air pressure, thereby controlling the vehicle. The air brake system generally consists of a control valve (the commonly used control valve is the 120 valve), an empty and loaded car adjustment device, a brake cylinder, a reservoir, a hose connector, a angle cock, a cut-off cock, a dust collector, and various specifications of brake pipe systems and joints.

[0003] The empty and loaded car adjustment device includes a sensing valve and a pressure limiting valve, which can automatically and steplessly adjust the brake cylinder pressure within a certain range according to the vehicle load, meet the requirements of the braking rate of the vehicle under different load states, and thus effectively improve the braking performance of the vehicle. When the train is in different load states, the displacement of the components above and below the spring can push the sensing valve to change the opening and closing and size of its valve port, so that the compressed air flowing out from the control valve, passing through the pressure limiting valve and then entering the brake cylinder is shunted. When the vehicle is empty, a part of the compressed air enters the pressure reducing cylinder, and the brake cylinder pressure at the balance is adjusted.

[0004] The pressure limiting valve has three valve ports. One valve port is connected to the control valve, the second valve port is connected to the upper chamber port of the sensing valve and the pressure reducing cylinder, and the third valve port is connected to the lower chamber port of the sensing valve and the brake cylinder. It can be seen that two of the valve ports of the pressure limiting valve need to be connected to two components at the same time. Currently, the adopted method is to add a tee joint in the pipeline to realize the connection of one valve port to two components. Adding a tee joint is equivalent to increasing the number of leakage points. Moreover, when a tee joint is arranged in the middle of the pipeline, along the length direction of the pipeline, the weight in the local area of the tee joint will change, intensifying the pipeline vibration. In order to reduce the pipeline vibration, fixed supports are often arranged at the tee joint; in order to make the fixed supports closer to the car body underframe, it is often necessary to add multiple bends to the pipeline, making the pipeline system complex.

[0005] Therefore, how to reduce the number of leakage points, optimize the pipeline routing, and reduce the number of fixed supports is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present application is to provide a pressure-limiting valve seat, so as to reduce the number of leakage points, optimize the pipeline routing, and reduce the number of fixed supports; Another purpose of the present application is to provide a pressure-limiting valve assembly, a valve group module, and an air braking system having the above-mentioned pressure-limiting valve seat.

[0007] To achieve the above purpose, the present application provides the following technical solutions: In the first aspect of the present application, a pressure-limiting valve seat is provided, which includes a valve seat base body. The valve seat base body is provided with an independent first valve cavity, a second valve cavity, and a third valve cavity; The valve seat base body is provided with a brake cylinder interface, a sensing valve lower cavity interface, a pressure-reducing cylinder interface, a sensing valve upper cavity interface, and a control valve interface. The brake cylinder interface and the sensing valve lower cavity interface are communicated with the first valve cavity, the pressure-reducing cylinder interface and the sensing valve upper cavity interface are communicated with the second valve cavity, and the control valve interface is communicated with the third valve cavity; The valve seat base body is further provided with a pressure-limiting valve interface for connecting with a pressure-limiting valve. There are three pressure-limiting valve interfaces, which are respectively and correspondingly communicated with the first valve cavity, the second valve cavity, and the third valve cavity.

[0008] In a possible implementation manner, the brake cylinder interface, the sensing valve lower cavity interface, the pressure-reducing cylinder interface, the sensing valve upper cavity interface, the control valve interface, and the pressure-limiting valve interface are all located on the same side of the valve seat base body, or are distributed on at least two sides of the valve seat base body.

[0009] In a possible implementation manner, the brake cylinder interface, the sensing valve lower cavity interface, the pressure-reducing cylinder interface, and the sensing valve upper cavity interface are located on the first side of the valve seat base body, and the control valve interface and the pressure-limiting valve interface are located on the second side of the valve seat base body; Or, The brake cylinder interface, the sensing valve lower cavity interface, the pressure-reducing cylinder interface, the sensing valve upper cavity interface, and the control valve interface are located on the first side of the valve seat base body, and the pressure-limiting valve interface is located on the second side of the valve seat base body.

[0010] In a possible implementation manner, a brake cylinder connection flange, a sensing valve lower cavity connection flange, a pressure-reducing cylinder connection flange, a sensing valve upper cavity connection flange, a control valve connection flange, and a pressure-limiting valve connection flange are provided on the valve seat base body; The brake cylinder interface is provided on the brake cylinder connection flange, the lower chamber interface of the sensing valve is provided on the lower chamber connection flange of the sensing valve, the reducing reservoir interface is provided on the reducing reservoir connection flange, the upper chamber interface of the sensing valve is provided on the upper chamber connection flange of the sensing valve, the control valve interface is provided on the control valve connection flange, and the pressure limiting valve interface is provided on the pressure limiting valve connection flange.

[0011] In a possible implementation manner, valve seat fastener holes are provided on the valve seat base; Or, An installation seat is provided on the valve seat base, and valve seat fastener holes for installation are provided on the installation seat.

[0012] In a possible implementation manner, the arrangement direction of at least two of the valve seat fastener holes is the thickness direction of the valve seat base.

[0013] The pressure limiting valve seat provided in this application is provided with a first valve chamber, a second valve chamber, and a third valve chamber. The brake cylinder interface, the lower chamber interface of the sensing valve, and one of the pressure limiting valve interfaces are all communicated with the first valve chamber. When the corresponding valve port of the pressure limiting valve is communicated with this pressure limiting valve interface, the pressure limiting valve can be communicated with the brake cylinder interface and the lower chamber interface of the sensing valve through the first valve chamber, and then the pressure limiting valve can be communicated with the brake cylinder and the lower chamber of the sensing valve of the sensing valve at the same time.

[0014] The reducing reservoir interface, the upper chamber interface of the sensing valve, and one of the pressure limiting valve interfaces are all communicated with the second valve chamber. When the corresponding valve port of the pressure limiting valve is communicated with this pressure limiting valve interface, the pressure limiting valve can be communicated with the reducing reservoir interface and the upper chamber interface of the sensing valve through the second valve chamber, and then the pressure limiting valve can be communicated with the reducing reservoir and the upper chamber of the sensing valve of the sensing valve at the same time.

[0015] When the pressure limiting valve seat provided in this application is applied to a pressure limiting valve, the corresponding pipeline interfaces of the brake cylinder, the lower chamber of the sensing valve of the sensing valve, the upper chamber of the sensing valve of the sensing valve, the reducing reservoir, and the control valve can be communicated with the corresponding interfaces of the pressure limiting valve seat, and then the connection between the pressure limiting valve and the corresponding components can be completed without setting a tee joint. Therefore, there is no leakage point at the tee joint. In addition, there is no problem of increased local weight caused by setting a tee joint in the pipeline, and then there is no risk of increased pipeline vibration caused by unbalanced weight. Of course, there is also no situation where an additional fixing support needs to be set for fixing the tee joint, and there is no situation where the pipeline needs to be bent to change the pipeline direction for installing the fixing support.

[0016] The second aspect of this application provides a pressure limiting valve assembly, including a pressure limiting valve and a pressure limiting valve seat, and the pressure limiting valve seat is the pressure limiting valve seat described in any one of the above. The pressure limiting valve is connected to the pressure limiting valve seat, and the three pressure limiting valve ports of the pressure limiting valve are respectively in one-to-one correspondence and communication with the three pressure limiting valve interfaces.

[0017] In a possible implementation manner, the material of the pressure limiting valve seat is cast aluminum alloy, cast iron or stainless steel.

[0018] The pressure limiting valve assembly provided by the present application has all the technical effects of the above-mentioned pressure limiting valve seat due to having the above-mentioned pressure limiting valve seat, and will not be elaborated herein again.

[0019] The third aspect of the present application provides a valve group module, including a pressure limiting valve assembly, a control valve, a auxiliary air cylinder, a reducing air cylinder and an accelerating release air cylinder, and the pressure limiting valve assembly is the pressure limiting valve assembly as described above.

[0020] In a possible implementation manner, the auxiliary air cylinder and the reducing air cylinder are integrated into a double-chamber air cylinder, the double-chamber air cylinder includes a first air cylinder chamber and a second air cylinder chamber, the first air cylinder chamber forms the auxiliary air cylinder, and the second air cylinder chamber forms the reducing air cylinder; The volume of the first air cylinder chamber is greater than the volume of the second air cylinder chamber, and the volume of the second air cylinder chamber is greater than the volume of the accelerating release air cylinder.

[0021] In a possible implementation manner, it further includes an installation template, and the pressure limiting valve assembly, the control valve, the double-chamber air cylinder and the accelerating release air cylinder are all fixed on the installation template.

[0022] In a possible implementation manner, the installation template is provided with a plurality of first lifting lugs, the double-chamber air cylinder is provided with a first air cylinder hanger, the first air cylinder hanger is hung on the first lifting lugs and fixed by first fasteners; The first lifting lugs are provided with first ear holes for the first fasteners to pass through, and the first air cylinder hanger is provided with first hanger holes for the first fasteners to pass through.

[0023] In a possible implementation manner, the first air cylinder hanger is a bending part formed by bending a strip-shaped plate body, the first hanger hole is a strip-shaped hole, and the extending direction of the first hanger hole is perpendicular to the width direction of the first air cylinder hanger.

[0024] In a possible implementation manner, the first air cylinder hanger includes a middle fitting part, fixed installation parts connected to both sides of the middle fitting part, and a support part connected to the side of the fixed installation part away from the middle fitting part; The ends of the support part and the middle fitting part are both welded to the outer wall of the double-chamber air cylinder, and the first hanger hole is opened on the fixed installation part.

[0025] In a possible implementation, the fixed mounting portion transitions to the support portion through a transition portion. The transition portion forms a first angle with the fixed mounting portion, and the fixed mounting portion and the support portion form a second angle. The first angle is greater than the second angle, and the second angle is an acute angle; The transition portion and the support portion form an obtuse angle.

[0026] In a possible implementation, it further includes a cylinder sling, which is hoop-mounted on the lower side of the double-chamber cylinder and fixed to the mounting template.

[0027] In a possible implementation, the mounting template is provided with a plurality of second lifting lugs, and the acceleration release cylinder is provided with a second cylinder hanger. The second cylinder hanger is hung on the second lifting lugs and fixed by a second fastener; A second ear plate hole for the second fastener to pass through is formed on the second lifting lug, and a second hanger hole for the second fastener to pass through is formed on the second cylinder hanger.

[0028] In a possible implementation, the mounting template is provided with a control valve mounting portion and a pressure limiting valve mounting portion. The pressure limiting valve seat is fixed on the pressure limiting valve mounting portion, and the control valve is fixed on the control valve mounting portion.

[0029] In a possible implementation, the mounting template has a bent rib portion, and a template mounting hole is formed on the bent rib portion. The template mounting hole is used to pass through a fastener to connect with a support seat on the train cross beam.

[0030] In a possible implementation, the mounting template has a downward extending edge, and the edge wraps around both sides of the support seat to limit the position of the mounting template in a first direction; A limiting block is provided on the support seat, and the limiting block is used to limit the position of the mounting template in a second direction. The first direction is perpendicular to the second direction.

[0031] The valve group module provided by the present application has all the technical effects of the above pressure limiting valve assembly due to having the above pressure limiting valve assembly, and will not be elaborated herein.

[0032] The fourth aspect of the present application provides an air braking system, including the valve group module as described in any one of the above.

[0033] The air braking system provided by the present application has all the technical effects of the above valve group module due to having the above valve group module, and will not be elaborated herein. Description of the Drawings

[0034] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 Structural schematic diagram of the pressure-limiting valve assembly disclosed in the embodiment of the present application at one angle; Figure 2 Structural schematic diagram of the pressure-limiting valve assembly disclosed in the embodiment of the present application at another angle; Figure 3 Structural schematic diagram of the pressure-limiting valve seat disclosed in the embodiment of the present application; Figure 4 Cross-sectional view of the pressure-limiting valve seat facing the first side disclosed in the embodiment of the present application; Figure 5 Cross-sectional view of the pressure-limiting valve seat facing the second side disclosed in the embodiment of the present application; Figure 6 Structural schematic diagram of the pressure-limiting valve assembly disclosed in the embodiment of the present application; Figure 7 Top view of the pressure-limiting valve assembly disclosed in the embodiment of the present application; Figure 8 Structural schematic diagram of the pressure-limiting valve assembly after removing the installation template disclosed in the embodiment of the present application; Figure 9 Cross-sectional view of the double-chamber air cylinder disclosed in the embodiment of the present application; Figure 10 Structural schematic diagram of the first air cylinder hanger disclosed in the embodiment of the present application; Figure 11 Structural schematic diagram of the installation template disclosed in the embodiment of the present application.

[0036] The meanings of the various reference numerals in the drawings are as follows: 100 - Pressure limiting valve; 101 - Brake cylinder connection flange; 1011 - Brake cylinder interface; 1012 - Brake cylinder fastening hole; 102 - Lower chamber connection flange of sensing valve; 1021 - Lower chamber interface of sensing valve; 1022 - Lower chamber fastening hole of sensing valve; 103 - Reducing reservoir connection flange; 1031 - Reducing reservoir interface; 1032 - Reducing reservoir fastening hole; 104 - Upper chamber connection flange of sensing valve; 1041 - Upper chamber interface of sensing valve; 1042 - Upper chamber fastening hole of sensing valve; 105 - Mounting seat; 1051 - Valve seat fastener hole; 106 - Control valve connection flange; 1061 - Control valve interface; 1062 - Control valve fastening hole; 107 - Pressure limiting valve connection flange; 1071 - Pressure limiting valve interface; 1072 - Pressure limiting valve fastening hole; 110 - First valve chamber; 120 - Second valve chamber; 130 - Third valve chamber; 200 - Pressure limiting valve; 300 - Double - chamber reservoir; 310 - First reservoir chamber; 311 - First reservoir interface; 320 - Second reservoir chamber; 321 - Second reservoir interface; 400 - Quick - release reservoir; 500 - Control valve; 600 - Mounting template; 610 - Bent rib portion; 611 - Template mounting hole; 620 - First lifting ear plate; 621 - First ear plate hole; 630 - Second lifting ear plate; 631 - Second ear plate hole; 640 - Pressure limiting valve mounting portion; 641 - Pressure limiting valve mounting hole; 650 - Control valve mounting portion; 651 - Control valve mounting hole; 700 - First reservoir hanger; 701 - Middle fitting portion; 702 - Fixed mounting portion; 703 - First hanger hole; 704 - Support portion; 705 - Transition portion; 810 - Support seat; 820 - Limit block; 900 - Second reservoir hanger. Detailed implementation manners

[0037] The embodiments of the present application disclose a pressure limiting valve seat to reduce the number of leakage points, optimize the pipeline routing, and reduce the number of fixed supports; The embodiments of the present application also disclose a pressure limiting valve assembly, a valve group module, and an air braking system having the above - mentioned pressure limiting valve seat.

[0038] Hereinafter, the embodiments will be described with reference to the drawings. In addition, the embodiments shown below do not impose any limitation on the application content recited in the claims. Further, all the contents of the configurations shown in the following embodiments are not necessarily essential for the solution of the application recited in the claims. It should be noted that for the sake of description, only the parts related to the relevant application are shown in the drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other.

[0039] The pressure limiting valve in the empty and full car adjustment device can adjust the amount of compressed air entering the brake cylinder according to the load of the train, and then adjust the braking force according to the train load. The pressure limiting valve is an important component to ensure the safe and stable operation of the railway freight car braking system. It accurately limits and regulates the brake cylinder pressure under different load conditions to ensure that the braking force meets the driving requirements.

[0040] To achieve the effect of adjusting the braking force of the brake cylinder, one valve port of the pressure limiting valve is connected to the control valve, the second valve port is connected to the upper chamber port of the sensing valve and the pressure reducing reservoir, and the third valve port is connected to the lower chamber port of the sensing valve and the brake cylinder.

[0041] The pressure reducing reservoir is mainly responsible for adjusting the pressure of the brake cylinder. In the empty car state, due to the relatively light vehicle weight, the required braking force is also relatively small. At this time, the pressure reducing reservoir will be connected to the brake cylinder to reduce the air pressure entering the brake cylinder, thereby generating a smaller braking force and avoiding waste and wear caused by excessive braking. In the full car state, the pressure reducing reservoir is not connected to the brake cylinder to ensure that the brake cylinder can generate sufficient braking force to stop safely. It should be noted that the structures and working principles of the pressure limiting valve and the sensing valve of the empty and full car adjustment device belong to the prior art and will not be elaborated here.

[0042] One valve port of the pressure limiting valve not only needs to be connected to the pressure reducing reservoir but also needs to be connected to the upper chamber port of the sensing valve; the other valve port not only needs to be connected to the brake cylinder but also needs to be connected to the lower chamber port of the sensing valve. Therefore, it is inevitable to add three-way joints on the pipeline. One three-way joint needs to be connected to the pressure reducing reservoir, the upper chamber port of the sensing valve, and the corresponding valve port of the pressure limiting valve through the corresponding pipeline. The other three-way joint needs to be connected to the brake cylinder, the lower chamber port of the sensing valve, and the corresponding valve port of the pressure limiting valve through the corresponding pipeline.

[0043] Taking the three-way joint connecting the pressure reducing reservoir and the upper chamber port of the sensing valve as an example, the pressure reducing reservoir is connected to the corresponding valve port of the pressure limiting valve through the pipeline, and the upper chamber port of the sensing valve needs to be connected to the corresponding valve port of the pressure limiting valve through the three-way joint. That is, originally, only one connection surface is required between the upper chamber port of the sensing valve and the corresponding valve port of the pressure limiting valve. However, when the upper chamber port of the sensing valve is connected to the pipeline between the pressure reducing reservoir and the corresponding valve port of the pressure limiting valve through the three-way joint, three connection surfaces are required, that is, two connection surfaces are increased, which also means that the number of leakage points is increased.

[0044] To reduce the number of leakage points and also achieve the purpose of enabling one valve port of the pressure limiting valve to connect two components simultaneously, the embodiment of the present application discloses a pressure limiting valve seat. As Figures 1-5As shown in the figure, the pressure limiting valve seat 100 disclosed in the embodiment of the present application includes a valve seat base body, and the valve seat base body is provided with a first valve cavity 110, a second valve cavity 120, and a third valve cavity 130 that are independent of each other. The first valve cavity 110, the second valve cavity 120, and the third valve cavity 130 are not connected to each other, forming pairwise independent valve cavities.

[0045] The valve seat base body is provided with a brake cylinder interface 1011, a sensing valve lower cavity interface 1021, a pressure reducing cylinder interface 1031, a sensing valve upper cavity interface 1041, and a control valve interface 1061. The brake cylinder interface 1011 is used to connect to the brake cylinder through a pipeline, the sensing valve lower cavity interface 1021 is used to connect to the lower cavity port of the sensing valve through a pipeline, the pressure reducing cylinder interface 1031 is used to connect to the pressure reducing cylinder through a pipeline, the sensing valve upper cavity interface 1041 is used to connect to the upper cavity port of the sensing valve through a pipeline, and the control valve interface 1061 is used to control the valve through a pipeline.

[0046] The brake cylinder interface 1011 and the sensing valve lower cavity interface 1021 are connected to the first valve cavity 110, that is, both the brake cylinder interface 1011 and the sensing valve lower cavity interface 1021 are connected to the first valve cavity 110; the pressure reducing cylinder interface 1031 and the sensing valve upper cavity interface 1041 are connected to the second valve cavity 120, that is, both the pressure reducing cylinder interface 1031 and the sensing valve upper cavity interface 1041 are connected to the second valve cavity 120. The control valve interface 1061 is connected to the third valve cavity 130.

[0047] The valve seat base body is further provided with a pressure limiting valve interface 1071 for connecting to the pressure limiting valve 200. The pressure limiting valve interface 1071 is in one-to-one correspondence and communication with the valve ports of the pressure limiting valve 200, that is, there are also three pressure limiting valve interfaces 1071. The three pressure limiting valve interfaces 1071 are in one-to-one correspondence and communication with the first valve cavity 110, the second valve cavity 120, and the third valve cavity 130.

[0048] After the pressure limiting valve 200 is fixed on the pressure limiting valve seat 100, the three valve ports of the pressure limiting valve 200 are in one-to-one correspondence and sealed communication with the three pressure limiting valve interfaces 1071, so that the corresponding valve ports of the pressure limiting valve 200 can be connected to the brake cylinder interface 1011 and the sensing valve lower cavity interface 1021 through the first valve cavity 110, and then the corresponding valve ports of the pressure limiting valve 200 can be connected to the brake cylinder and the sensing valve lower cavity port; it can also be realized that the corresponding valve ports of the pressure limiting valve 200 are connected to the pressure reducing cylinder interface 1031 and the sensing valve upper cavity interface 1041 through the second valve cavity 120, and then the corresponding valve ports of the pressure limiting valve 200 can be connected to the pressure reducing cylinder and the sensing valve upper cavity port; it can also be realized that the corresponding valve ports of the pressure limiting valve 200 are connected to the control valve interface 1061 through the third valve cavity 130, and then the corresponding valve ports of the pressure limiting valve 200 can be connected to the control valve.

[0049] The sensing valve can be a C-A type sensing valve, and the pressure limiting valve can be an X-A type pressure limiting valve. It should be noted that the above models are only examples and do not constitute limitations on the sensing valve and the pressure limiting valve.

[0050] In summary, for the pressure limiting valve seat 100 disclosed in the embodiments of the present application, when applied to the pressure limiting valve 200, the corresponding pipeline interfaces of the brake cylinder, the lower cavity of the sensing valve of the sensing valve, the upper cavity of the sensing valve of the sensing valve, the pressure reducing cylinder, and the control valve can be connected to the corresponding interfaces of the pressure limiting valve seat, thereby completing the connection of the pressure limiting valve 200 with the corresponding components (brake cylinder, sensing valve, pressure reducing cylinder, and control valve). There is no need to set a three-way joint, so there is no leakage point at the three-way joint.

[0051] In addition, there is no problem of increased local weight caused by setting a three-way joint in the pipeline, and consequently, there is no risk of increased pipeline vibration caused by uneven weight. Of course, there is also no situation where an additional fixed support needs to be set for fixing the three-way joint, and there is no situation where the pipeline needs to be bent and the pipeline direction needs to be changed in order to find a suitable position for installing the fixed support. Since there is no constraint of the three-way joint, the pipeline can reasonably select the direction according to requirements without considering the installation position of the fixed support.

[0052] The embodiments of the present application do not limit the specific opening positions of the brake cylinder interface 1011, the lower cavity interface 1021 of the sensing valve, the pressure reducing cylinder interface 1031, the upper cavity interface 1041 of the sensing valve, the control valve interface 1061, and the pressure limiting valve interface 1071, as long as they can facilitate connection with the corresponding interfaces.

[0053] For example, the brake cylinder interface 1011, the lower cavity interface 1021 of the sensing valve, the pressure reducing cylinder interface 1031, the upper cavity interface 1041 of the sensing valve, the control valve interface 1061, and the pressure limiting valve interface 1071 can all be arranged on the same side of the valve seat base. The brake cylinder interface 1011, the lower cavity interface 1021 of the sensing valve, the pressure reducing cylinder interface 1031, the upper cavity interface 1041 of the sensing valve, the control valve interface 1061, and the pressure limiting valve interface 1071 can also be arranged on at least two sides of the valve seat base respectively. For example, a part of the interfaces can be arranged on one side of the valve seat base, and other part of the interfaces can be arranged on the other side of the valve seat base.

[0054] As Figure 1 and Figure 3 shown, in a specific embodiment of the present application, the brake cylinder interface 1011, the lower cavity interface 1021 of the sensing valve, the pressure reducing cylinder interface 1031, and the upper cavity interface 1041 of the sensing valve are located on the first side of the valve seat base, and the control valve interface 1061 and the pressure limiting valve interface 1071 are located on the second side of the valve seat base. The first side and the second side of the valve seat base are opposite sides.

[0055] The brake cylinder, the pressure reducing cylinder, and the sensing valve are all located on one side of the pressure limiting valve seat 100 close to the first side. Therefore, arranging the brake cylinder interface 1011, the lower chamber interface 1021 of the sensing valve, the pressure reducing cylinder interface 1031, and the upper chamber interface 1041 of the sensing valve on the first side of the valve seat base can facilitate the corresponding connection of the pipelines on the brake cylinder, the pressure reducing cylinder, and the sensing valve to the pressure limiting valve seat 100.

[0056] Please refer to Figure 6 , the control valve 500 is located on one side of the pressure limiting valve seat 100 close to the second side. Therefore, arranging the control valve interface 1061 on the second side of the valve seat base can facilitate the corresponding connection of the pipeline on the control valve 500 to the pressure limiting valve seat 100. Since only the control valve interface 1061 is arranged on the second side of the valve seat base, there is a relatively large remaining layout space. Subsequently, the pressure limiting valve interface 1071 is also set on the second side of the valve seat base, enabling the pressure limiting valve 200 to be fixed on the second side of the valve seat base, facilitating the layout of the pressure limiting valve 200.

[0057] It should be noted that the brake cylinder interface 1011, the lower chamber interface 1021 of the sensing valve, the pressure reducing cylinder interface 1031, the upper chamber interface 1041 of the sensing valve, and the control valve interface 1061 can all be located on the first side of the valve seat base, and the pressure limiting valve interface 1071 is located on the second side of the valve seat base. That is, in this embodiment, all the interfaces for connecting to external components can also be set on the same side of the valve seat base, while the interfaces for connecting to the pressure limiting valve 200 are set on the other side of the valve seat base. With such an arrangement, after fixing the pressure limiting valve 200 on the pressure limiting valve seat 100, the first side of the valve seat base can be oriented outward to facilitate the connection to other external components.

[0058] As Figure 1 and Figure 3 shown, the valve seat base is provided with a brake cylinder connection flange 101 that can facilitate the butt joint with the pipeline joint of the brake cylinder, a lower chamber connection flange 102 of the sensing valve that can facilitate the butt joint with the pipeline joint of the lower chamber port of the sensing valve, a pressure reducing cylinder connection flange 103 that can facilitate the butt joint with the pipeline joint of the pressure reducing cylinder, an upper chamber connection flange 104 of the sensing valve that can facilitate the butt joint with the pipeline joint of the upper chamber port of the sensing valve, a control valve connection flange 106 that can facilitate the butt joint with the pipeline joint of the control valve, and a pressure limiting valve connection flange 107 that can facilitate the butt joint with the flange of the pressure limiting valve 200.

[0059] The brake cylinder connection flange 101 is provided with brake cylinder fastening holes 1012, and the connection between the brake cylinder connection flange 101 and the pipeline joint of the brake cylinder is achieved through the cooperation of fasteners with the brake cylinder fastening holes 1012.

[0060] The sensing valve lower chamber connecting flange 102 is provided with a sensing valve lower chamber fastening hole 1022. The connection between the sensing valve lower chamber connecting flange 102 and the pipeline joint of the sensing valve lower chamber port is achieved through the cooperation of a fastener and the sensing valve lower chamber fastening hole 1022.

[0061] The reducing cylinder connecting flange 103 is provided with a reducing cylinder fastening hole 1032. The connection between the reducing cylinder connecting flange 103 and the pipeline joint of the reducing cylinder is achieved through the cooperation of a fastener and the reducing cylinder fastening hole 1032.

[0062] The sensing valve upper chamber connecting flange 104 is provided with a sensing valve upper chamber fastening hole 1042. The connection between the sensing valve upper chamber connecting flange 104 and the pipeline joint of the sensing valve upper chamber port is achieved through the cooperation of a fastener and the sensing valve upper chamber fastening hole 1042.

[0063] The control valve connecting flange 106 is provided with a control valve fastening hole 1062. The connection between the control valve connecting flange 106 and the pipeline joint of the control valve is achieved through the cooperation of a fastener and the control valve fastening hole 1062.

[0064] The pressure limiting valve connecting flange 107 is provided with a pressure limiting valve fastening hole 1072. The connection between the pressure limiting valve connecting flange 107 and the flange of the pressure limiting valve 200 is achieved through the cooperation of a fastener and the pressure limiting valve fastening hole 1072.

[0065] As Figure 4 and Figure 5 shown, the side walls of the first valve chamber 110, the second valve chamber 120, and the third valve chamber 130 of the pressure limiting valve seat 100 include linear spacer bodies, curved spacer bodies, etc. At the set positions of the brake cylinder fastening hole 1012, the sensing valve lower chamber fastening hole 1022, the reducing cylinder fastening hole 1032, the sensing valve upper chamber fastening hole 1042, the control valve fastening hole 1062, and the pressure limiting valve fastening hole 1072, there should be a linear spacer body or a curved spacer body to facilitate the opening of the corresponding fastening holes. Multiple peninsula structures can be formed on the linear spacer body and the curved spacer body to arrange the corresponding fastening holes; when fastening holes need to be arranged in a position where there is no linear spacer body and curved spacer body, such as inside the cavity, small island structures can be arranged in the cavity to arrange the fastening holes.

[0066] The brake cylinder connecting flange 101, the sensing valve lower chamber connecting flange 102, the reducing cylinder connecting flange 103, the sensing valve upper chamber connecting flange 104, the control valve connecting flange 106, and the pressure limiting valve connecting flange 107 can be integrally cast and formed with the valve seat base body. The material of the pressure limiting valve seat 100 can be cast aluminum alloy, cast iron, or stainless steel.

[0067] The brake cylinder interface 1011 is provided on the brake cylinder connection flange 101, the lower chamber interface 1021 of the sensing valve is provided on the lower chamber connection flange 102 of the sensing valve, the reducing reservoir interface 1031 is provided on the reducing reservoir connection flange 103, the upper chamber interface 1041 of the sensing valve is provided on the upper chamber connection flange 104 of the sensing valve, the control valve interface 1061 is provided on the control valve connection flange 106, and the pressure limiting valve interface 1071 is provided on the pressure limiting valve connection flange 107.

[0068] As Figure 1 shown, in a specific embodiment of the present application, valve seat fastener holes 1051 are provided on the valve seat base body, and the pressure limiting valve seat 100 can be fixed at the position to be fixed by using the cooperation between the fasteners and the valve seat fastener holes 1051.

[0069] It should be noted that an installation seat 105 can also be provided on the valve seat base body, and the valve seat fastener holes 1051 are provided on the installation seat 105. The installation seat 105 can increase the height of the installation points of the pressure limiting valve seat 100 to facilitate installation. In addition, the installation seat 105 can also compensate for the dimension in the thickness direction of the valve seat base body to facilitate the arrangement of multiple valve seat fastener holes 1051. The installation seat 105 and the valve seat base body can be designed as an integral structure, or the installation seat 105 can also be fixed on the valve seat base body in a detachable manner. The present embodiment does not limit the fixing method of the installation seat 105 and the valve seat base body.

[0070] The arrangement direction of the first side and the second side of the valve seat base body is the thickness direction of the valve seat base body. In view of the lightweight requirement of the valve seat base body, the thickness dimension of the valve seat base body is not too large, and only one valve seat fastener hole 1051 can be arranged along the thickness direction of the valve seat base body, which is not conducive to the reliability of the installation of the pressure limiting valve seat 100.

[0071] In this embodiment, at least two valve seat fastener holes 1051 are arranged in the thickness direction of the valve seat base body. Two installation seats 105 can be provided, and the two installation seats 105 are arranged perpendicular to the thickness direction of the valve seat base body, and two valve seat fastener holes 1051 arranged along the thickness direction of the valve seat base body can be provided on each installation seat 105. The root of the installation seat 105 is connected to the valve seat base body, so the root of the valve seat installation seat 105 can be designed to have the same thickness dimension as the valve seat base body to prevent sudden change in size at the connection. For the top of the installation seat 105, since two valve seat fastener holes 1051 need to be provided, a larger dimension is required along the thickness direction of the valve seat base body to ensure a certain distance between the two valve seat fastener holes 1051 to facilitate the locking of the fasteners. In this embodiment, the pressure limiting valve seat 100 has at least four installation points. When the pressure limiting valve 200 is fixed on the pressure limiting valve seat 100 and fixed at the corresponding installation position through the pressure limiting valve seat 100, a more reliable installation effect can be obtained.

[0072] As Figure 1 and Figure 2 shown, the embodiment of the present application also discloses a pressure limiting valve assembly, which includes a pressure limiting valve 200 and a pressure limiting valve seat 100. The pressure limiting valve seat 100 is the pressure limiting valve seat 100 disclosed in the above embodiment. Due to the presence of the above pressure limiting valve seat 100, it has all the technical effects of the above pressure limiting valve seat 100, which will not be elaborated herein again.

[0073] The pressure limiting valve 200 is connected to the pressure limiting valve seat 100, and the three pressure limiting valve ports of the pressure limiting valve 200 are respectively in one-to-one correspondence and communication with three pressure limiting valve interfaces 1071. The pressure limiting valve 200 can be fixed on the pressure limiting valve seat 100 through fasteners and fixed at the installation position through the pressure limiting valve seat 100. Which valve cavity among the first valve cavity 110, the second valve cavity 120, and the third valve cavity 130 the three pressure limiting valve ports of the pressure limiting valve 200 are specifically connected to is the same as the prior art and does not belong to the improvement direction of the present application. The communication relationship in the prior art can be referred to, which will not be elaborated herein again.

[0074] As Figures 6-8 shown, the embodiment of the present application also discloses a valve group module, which includes a pressure limiting valve assembly, a control valve 500, a secondary air cylinder, a reducing air cylinder, and an accelerating release air cylinder 400. Among them, the pressure limiting valve assembly is the pressure limiting valve assembly disclosed in the above embodiment. Due to the presence of the above pressure limiting valve assembly, it has all the technical effects of the above pressure limiting valve assembly, which will not be elaborated herein again. The control valve 500 can be a 120 valve or other types of control valves.

[0075] The secondary air cylinder is a compressed air storage unit for delivering compressed air to the brake cylinder through the control valve 500 to achieve braking. When these compressed air flows into the brake cylinder, it will push the piston inside to move, thereby converting the air pressure into mechanical thrust. Subsequently, the brake shoes behind the brake cylinder will tightly fit the wheels for braking operation.

[0076] The accelerating release air cylinder 400 is mainly connected to the train pipe. When the train pipe is inflated and released, the accelerating release air cylinder 400 accelerates the release speed of the train through local pressurization to ensure that the train can quickly and smoothly return to the normal operating state and improve the operating efficiency. The control valve 500 can be provided with a release valve pull rod to enable the control valve 500 to have a release function.

[0077] As Figure 9 shown, in a specific embodiment of the present application, the secondary air cylinder and the reducing air cylinder are integrated into a double-chamber air cylinder 300. The double-chamber air cylinder 300 includes a first air cylinder chamber 310 and a second air cylinder chamber 320. The first air cylinder chamber 310 forms the secondary air cylinder, and the second air cylinder chamber 320 forms the reducing air cylinder. One end of the double-chamber air cylinder 300 is provided with a first air cylinder interface 311 communicating with the first air cylinder chamber 310 and a second air cylinder interface 321 communicating with the second air cylinder chamber 320.

[0078] The volume of the first cylinder chamber 310 is greater than that of the second cylinder chamber 320, and the volume of the second cylinder chamber 320 is greater than that of the quick release cylinder 400. Specifically, the volume of the first cylinder chamber 310 can be 50L, the volume of the second cylinder chamber 320 can be 28L, and the volume of the quick release cylinder 400 can be 11L. It should be noted that the specific volumes of the first cylinder chamber 310, the second cylinder chamber 320, and the quick release cylinder 400 are not limited to the above examples, and those skilled in the art can reasonably select specific volumes according to the usage requirements.

[0079] The double-chamber cylinder 300 can include an intermediate cylinder body and cylinder end parts welded to both ends of the intermediate cylinder body. An intermediate end cover is also arranged inside the intermediate cylinder body, and the intermediate cylinder body is divided into two chambers (the first cylinder chamber 310, the second cylinder chamber 320) by the intermediate end cover. The first cylinder interface 311 and the second cylinder interface 321 can be welded to the two cylinder end parts respectively.

[0080] In the actual manufacturing process of the double-chamber cylinder 300, after the double-chamber cylinder 300 is welded, a water and air pressure test needs to be carried out. The intermediate end cover undergoes two water and air pressure tests respectively with the first cylinder chamber 310 and the second cylinder chamber 320 of the double-chamber cylinder 300, ensuring from the manufacturing source that the double-chamber cylinder 300 does not have air leakage.

[0081] In this embodiment, in order to facilitate the installation of the valve group module, the pressure limiting valve assembly, the control valve 500, the double-chamber cylinder 300, and the quick release cylinder 400 can be integrated. Specifically, the valve group module can include an installation template 600, and the pressure limiting valve assembly, the control valve 500, the double-chamber cylinder 300, and the quick release cylinder 400 are all fixed to the installation template 600.

[0082] The valve group module can be integrally installed on the train through a special lifting tooling. If maintenance and repair of the valve group module are required, the valve group module can be integrally disassembled on the train. Of course, a specific component in the valve group module can also be disassembled on the train.

[0083] As Figure 6 and Figure 11 shown, the installation template 600 is provided with a plurality of first lifting lugs 620, and the double-chamber cylinder 300 is provided with a first cylinder hanger 700. The first cylinder hanger 700 is hung on the first lifting lug 620 and fixed by a first fastener.

[0084] In order to reduce the weight of the installation template 600, weight reduction holes can be opened on the installation template 600. Figure 11In the shown solution, a total of four first lifting lugs 620 are provided, and the four first lifting lugs 620 point in the same direction from the base of the installation template 600. A first lug hole 621 for a first fastener to pass through is formed on the first lifting lug 620, and a first hanger hole 703 for the first fastener to pass through is formed on the first air cylinder hanger 700.

[0085] During installation, the first air cylinder hanger 700 can be hung on the first lifting lug 620, align the first hanger hole 703 with the first lug hole 621, and then lock them by passing the first fastener through the first hanger hole 703 and the first lug hole 621. The first lifting lug 620 has a supporting effect on the first air cylinder hanger 700, and the first fastener can prevent the first air cylinder hanger 700 from moving along the first lifting lug 620.

[0086] As Figure 10 shown, the first air cylinder hanger 700 is a bent part formed by bending a strip-shaped plate body, the first hanger hole 703 is a strip-shaped hole, and the extending direction of the first hanger hole 703 is perpendicular to the width direction of the first air cylinder hanger 700. That is, the dimension in the width direction of the first air cylinder hanger 700 is limited. If the extending direction of the first hanger hole 703 is designed to be parallel to the width direction of the first air cylinder hanger 700, it will affect the designed length of the first hanger hole 703. Moreover, the end of the first hanger hole 703 is relatively close to the edge of the first air cylinder hanger 700, affecting the strength at the position of the first hanger hole 703 and easily causing fracture at the position of the first hanger hole 703, affecting the reliability of the fixation.

[0087] In this embodiment, the extending direction of the first hanger hole 703 is designed to be perpendicular to the width direction of the first air cylinder hanger 700, so that the length direction of the first hanger hole 703 is parallel to the length direction of the first air cylinder hanger 700, and then the distance between the first hanger hole 703 and the side of the first air cylinder hanger 700 is relatively large, reducing the influence of the first hanger hole 703 on the strength of the first air cylinder hanger 700. With such a setting, it can also greatly reduce the phenomenon that cracks appear near the position of the first hanger hole 703 of the first air cylinder hanger 700 caused by the high-speed and frequent vibration of the vehicle.

[0088] The first lug hole 621 can also be designed as a strip-shaped hole, and the extending direction of the first lug hole 621 can be designed to be perpendicular to the extending direction of the first hanger hole 703 to increase the adjustment range of the first air cylinder hanger 700 on the first lifting lug 620, so that even if there are machining errors in the first air cylinder hanger 700, the installation of the double-chamber air cylinder 300 can still be completed.

[0089] As Figure 10As shown in the figure, the first air cylinder hanger 700 includes a middle fitting portion 701, fixed mounting portions 702 connected to both sides of the middle fitting portion 701, and a support portion 704 connected to one side of the fixed mounting portion 702 away from the middle fitting portion 701. The middle fitting portion 701 fits on the outer wall of the double-chamber air cylinder 300 and can be in an arc-shaped structure.

[0090] The end of the support portion 704 can be in a structure bent outward to increase the contact area with the outer wall of the double-chamber air cylinder 300. The end of the support portion 704 and the middle fitting portion 701 are both welded to the outer wall of the double-chamber air cylinder 300, and the first hanger hole 703 is opened on the fixed mounting portion 702.

[0091] The middle fitting portion 701 can be transitioned to the fixed mounting portion 702 through an inclined extension portion. The inclined extension portion can extend from the middle fitting portion 701 in an obliquely upward direction to increase the height of the fixed mounting portion 702, so that the fixed mounting portion 702 is higher than the middle fitting portion 701. After the first air cylinder hanger 700 is welded to the double-chamber air cylinder 300, the fixed mounting portion 702 can protrude beyond the outer wall of the double-chamber air cylinder 300 to facilitate the threading of the first fastener.

[0092] The fixed mounting portion 702 is transitioned to the support portion 704 through a transition portion 705. The transition portion 705 and the fixed mounting portion 702 form a first angle, and the fixed mounting portion 702 and the support portion 704 form a second angle. The first angle is greater than the second angle, and the second angle is an acute angle. Exemplarily, the transition portion 705 and the fixed mounting portion 702 can be at a right angle, and of course, it can also be designed at other angles. The fixed mounting portion 702 and the support portion 704 can be at an acute angle, and the transition portion 705 and the support portion 704 are at an obtuse angle. In this embodiment, by providing the transition portion 705 that forms a first angle with the fixed mounting portion 702 to transition to the support portion 704, compared with the fixed mounting portion 702 directly transitioning to the support portion 704 along the second angle, adding the transition portion 705 between the fixed mounting portion 702 and the support portion 704 can smoothly transition from the fixed mounting portion 702 to the support portion 704, reduce the bending angle at the transition, reduce the occurrence of cracks caused by bending, and thus avoid the crack phenomenon caused by the high-speed and frequent vibration of the vehicle at this position.

[0093] The width of the first air cylinder hanger 700 can be designed to be 60 mm. Of course, it can also be designed at other widths, not limited to 60 mm, as long as it can ensure the strength of the first air cylinder hanger 700 and the strength of its connection weld with the double-chamber air cylinder 300.

[0094] In order to further strengthen the fixing strength of the double-chamber air cylinder 300, the valve group module may further include an air cylinder sling. The air cylinder sling is hoop-mounted on the lower side of the double-chamber air cylinder 300 and fixed to the mounting template 600. The air cylinder sling can support the double-chamber air cylinder 300 from the lower side. Combined with the first air cylinder hanger 700 on the upper side of the double-chamber air cylinder 300, the double-chamber air cylinder 300 can be fixed from the upper and lower sides, improving the reliability of the installation of the double-chamber air cylinder 300.

[0095] As Figure 8 and Figure 11 shown, the mounting template 600 is provided with a plurality of second lifting lugs 630. Since the volume of the quick-release air cylinder 400 is small, only two second lifting lugs 630 may be provided to support the quick-release air cylinder 400. Of course, the number of the second lifting lugs 630 can also be set to other numbers according to requirements, not limited to two.

[0096] A second air cylinder hanger 900 is provided on the quick-release air cylinder 400. The second air cylinder hanger 900 is hung on the second lifting lug 630 and fixed by a second fastener. A second ear plate hole 631 for the second fastener to pass through is provided on the second lifting lug 630, and a second hanger hole for the second fastener to pass through is provided on the second air cylinder hanger 900.

[0097] The second air cylinder hanger 900 can be welded to the quick-release air cylinder 400. When installing the quick-release air cylinder 400, first hang the second air cylinder hanger 900 on the second lifting lug 630, align the second hanger hole with the second ear plate hole 631, and then insert and lock the second fastener.

[0098] The mounting template 600 is provided with a control valve installation part 650 and a pressure limiting valve installation part 640. The pressure limiting valve seat 100 is fixed to the pressure limiting valve installation part 640, and the control valve 500 is fixed to the control valve installation part 650. A pressure limiting valve installation hole 641 is provided on the pressure limiting valve installation part 640, and a control valve installation hole 651 is provided on the control valve installation part 650. A valve seat fastener hole 1051 is provided on the pressure limiting valve seat 100, and a control valve fastening hole is provided on the control valve 500. A third fastener passes through the valve seat fastener hole 1051 and the pressure limiting valve installation hole 641 to fix the pressure limiting valve seat 100 to the pressure limiting valve installation part 640. A fourth fastener passes through the control valve fastening hole and the control valve installation hole 651 to fix the control valve 500 to the control valve installation part 650.

[0099] As Figure 6 and Figure 11As shown, the installation template 600 has a bent rib portion 610. The installation template 600 can be integrally molded from a high-strength plate. After the bent rib portion 610 is formed, the overall stiffness of the installation template 600 can be increased, and there is no welding inside the installation template 600. Each installation hole (the first ear plate hole 621, the second ear plate hole 631, the pressure limiting valve installation hole 641, and the control valve installation hole 651) is also made by integral blanking with a special mold to ensure the assembly accuracy between components. To effectively reduce the self-weight of the integral structure installation template 600, weight-reducing holes can be provided inside the installation template 600.

[0100] A template installation hole 611 is provided on the bent rib portion 610. The template installation hole 611 is used to pass through fasteners to connect with the support seat 810 on the train crossbeam. The support seat 810 can be welded to the train crossbeam, and an installation seat hole corresponding to the template installation hole 611 is provided on the support seat 810. It should be noted that the installation template 600 can also be welded to the train crossbeam. The template installation hole 611 can be a strip hole, and the extending direction of the strip hole is parallel to the extending direction of the bent rib portion 610 to facilitate the alignment of the template installation hole 611 with the installation seat hole of the support seat 810.

[0101] The installation steps of the valve group module are as follows: Assembly of the valve group module: Install the control valve 500, the double-chamber air cylinder 300, the quick-release air cylinder 400, and the pressure limiting valve assembly on the installation template 600 respectively, and then integrally install the valve group module onto the train through a special lifting tooling.

[0102] Integrally installing the valve group module on the train: Set 4 support seats 810 at the position of the large crossbeam of the train for installing and supporting the valve group module.

[0103] 1) Translate the valve group module integrally to the installation position; 2) Use the lifting tooling equipment to vertically lift the valve group module integrally from under the vehicle to a suitable height position between the two large crossbeams; 3) Then translate the valve group module integrally so that the template installation hole 611 of the installation template 600 coincides with the installation seat hole of the support seat 810; 4) Fasten the support seat 810 and the installation template 600 with fasteners such as bolts or rivets, and then assemble the braking system with the connecting pipe system inside the valve group module; 5) If it is necessary to disassemble the valve group module integrally, only need to operate in reverse according to the above operation steps; if it is necessary to disassemble a certain component or pipe system of the valve group module alone, only need to perform this operation alone.

[0104] In order to limit the installation template 600, in this embodiment, the installation template 600 has a downward-extending edge that wraps around both sides of the support seat 810 to limit the position of the installation template 600 in the first direction, so that the installation template 600 cannot reciprocate in the first direction.

[0105] The support seat 810 is provided with a limit block 820 for limiting the position of the installation template 600 in the second direction, so that the installation template 600 cannot reciprocate in the second direction.

[0106] The first direction is perpendicular to the second direction. With such a setting, the installation template 600 cannot move in both the first direction and the second direction, and then the installation template 600 cannot move horizontally and vertically in the plane. Combined with the fasteners for fixing the installation template 600, the installation template 600 can also be prevented from moving vertically, which can prevent the valve group module from falling off.

[0107] The valve group module disclosed in the embodiment of the present application has the following technical effects: 1) The valve group module is applicable not only to the C70E type open wagon, but also to covered wagon models, flat car series models, etc.

[0108] 2) The valve group module is assembled into an integral module with a compact structure, a small number of brake pipe systems, and low manufacturing difficulty; the valve group module and the vehicle body are connected by a fastener structure, avoiding welding deformation. 3) The entire valve group module is relatively independent, and the entire valve group module can be used as an assembly process, greatly reducing the assembly time. 4) When the vehicle needs to be repaired after long-term use, it can be disassembled and replaced modularly as a whole, saving operation time and reducing labor costs. 5) The valve group module has a simple structure itself, avoiding the arrangement of spatial pipe systems, meeting the overall disassembly and assembly requirements, and also adapting to the independent disassembly of each component. 6) The installation template 600 is integrally molded by pressing, with accurate positioning, which not only increases the stiffness of the installation template 600, but also effectively avoids the influence of welding deformation caused by the existing welded template structure. 7) The integrated structure of the double-chamber air cylinder makes the overall system arrangement more compact, and it is convenient for assembly, disassembly, maintenance, etc.

[0109] 8) The pressure limiting valve seat can effectively reduce the pipeline branches, reduce the number of three-way joints, and then reduce the number of leakage points in the braking system.

[0110] 11) The pressure limiting valve seat can optimize the pipeline routing, reduce the number of brake pipe supports, and improve the convenience of pipeline assembly process.

[0111] 12) The railway freight car adopts the valve group module solution, which can improve the manufacturing and maintenance efficiency of the vehicle and has good operability. It has good operability in the initial design and manufacture, operation, and subsequent depot repair and factory repair of the vehicle.

[0112] The embodiment of the present application also discloses an air braking system, which includes the valve group module disclosed in the above embodiment. Due to the above valve group module, it has all the technical effects of the above valve group module, and will not be elaborated herein.

[0113] As shown in the present application and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one" and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. An element defined by the statement "comprising one..." does not exclude the existence of another identical element in the process, method, commodity or device including the element.

[0114] In the description of the present application, unless otherwise clearly defined, words such as setting, installation, and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.

[0115] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

[0116] Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A pressure limiting valve seat, characterized in that: It comprises a valve seat base, wherein the valve seat base is provided with a first valve cavity (110), a second valve cavity (120) and a third valve cavity (130) which are independent of each other; The valve seat base is provided with a brake cylinder interface (1011), a sensor valve lower chamber interface (1021), a pressure-reducing air cylinder interface (1031), a sensor valve upper chamber interface (1041) and a control valve interface (1061); the brake cylinder interface (1011) and the sensor valve lower chamber interface (1021) are in communication with the first valve chamber (110); the pressure-reducing air cylinder interface (1031) and the sensor valve upper chamber interface (1041) are in communication with the second valve chamber (120); and the control valve interface (1061) is in communication with the third valve chamber (130); The valve seat base is also provided with a pressure-limiting valve interface (1071) for connecting to the pressure-limiting valve (200), and there are three pressure-limiting valve interfaces (1071), which are connected to the first valve cavity (110), the second valve cavity (120) and the third valve cavity (130) in a one-to-one correspondence.

2. The pressure limiting valve seat according to claim 1, characterized in that: The brake cylinder interface (1011), the sensor valve lower chamber interface (1021), the pressure-reducing air cylinder interface (1031), the sensor valve upper chamber interface (1041), the control valve interface (1061) and the pressure-limiting valve interface (1071) are all located on the same side of the valve seat base, or are distributed on at least two sides of the valve seat base.

3. The pressure limiting valve seat according to claim 1, characterized in that: The brake cylinder interface (1011), the sensor valve lower chamber interface (1021), the pressure-reducing air cylinder interface (1031) and the sensor valve upper chamber interface (1041) are located on a first side of the valve seat base, and the control valve interface (1061) and the pressure-limiting valve interface (1071) are located on a second side of the valve seat base; or, The brake cylinder interface (1011), the sensor valve lower chamber interface (1021), the pressure-reducing air cylinder interface (1031), the sensor valve upper chamber interface (1041) and the control valve interface (1061) are located on a first side of the valve seat base, and the pressure-limiting valve interface (1071) is located on a second side of the valve seat base.

4. The pressure limiting valve seat according to claim 1, characterized in that: The valve seat base is provided with a brake cylinder connecting flange (101), a sensor valve lower chamber connecting flange (102), a pressure reducing air cylinder connecting flange (103), a sensor valve upper chamber connecting flange (104), a control valve connecting flange (106) and a pressure limiting valve connecting flange (107); The brake cylinder interface (1011) is arranged on the brake cylinder connecting flange (101), the sensor valve lower chamber interface (1021) is arranged on the sensor valve lower chamber connecting flange (102), the pressure reducing air cylinder interface (1031) is arranged on the pressure reducing air cylinder connecting flange (103), the sensor valve upper chamber interface (1041) is arranged on the sensor valve upper chamber connecting flange (104), the control valve interface (1061) is arranged on the control valve connecting flange (106), and the pressure limiting valve interface (1071) is arranged on the pressure limiting valve connecting flange (107).

5. The pressure limiting valve seat according to any one of claims 1 to 4, characterized in that: The valve seat base is provided with a valve seat fastener hole (1051); or, A mounting seat (105) is provided on the valve seat base, and a valve seat fastener hole (1051) for mounting is provided on the mounting seat (105).

6. The pressure limiting valve seat according to claim 5, characterized in that: The arrangement direction of at least two of the valve seat fastener holes (1051) is the thickness direction of the valve seat base.

7. A pressure limiting valve assembly, characterized in that: Comprising a pressure-limiting valve (200) and a pressure-limiting valve seat (100), wherein the pressure-limiting valve seat (100) is the pressure-limiting valve seat (100) according to any one of claims 1 to 6; The pressure-limiting valve (200) is connected to the pressure-limiting valve seat (100), and the three pressure-limiting valve ports of the pressure-limiting valve (200) are respectively connected to the three pressure-limiting valve interfaces (1071) in a one-to-one correspondence.

8. The pressure limiting valve assembly according to claim 7, characterized in that: The material of the pressure-limiting valve seat (100) is cast aluminum alloy, cast iron or stainless steel.

9. A valve group module, characterized in that: It comprises a pressure-limiting valve assembly, a control valve (500), an auxiliary air cylinder, a pressure-reducing air cylinder and an accelerating relief air cylinder (400), wherein the pressure-limiting valve assembly is the pressure-limiting valve assembly according to claim 7 or 8.

10. The valve group module according to claim 9, characterized in that: The auxiliary air cylinder and the pressure-reducing air cylinder are integrated into a double-chamber air cylinder (300), the double-chamber air cylinder (300) comprising a first air cylinder cavity (310) and a second air cylinder cavity (320), the first air cylinder cavity (310) forming the auxiliary air cylinder, and the second air cylinder cavity (320) forming the pressure-reducing air cylinder; The volume of the first air cylinder chamber (310) is greater than the volume of the second air cylinder chamber (320), and the volume of the second air cylinder chamber (320) is greater than the volume of the acceleration relief air cylinder (400).

11. The valve group module according to claim 10, characterized in that: It also includes a mounting template (600), on which the pressure-limiting valve assembly, the control valve (500), the double-chamber air cylinder (300) and the accelerated relief air cylinder (400) are all fixed.

12. The valve group module according to claim 11, characterized in that: The installation template (600) is provided with a plurality of first lifting ear plates (620), and the double-chamber air cylinder (300) is provided with a first air cylinder hanger (700), the first air cylinder hanger (700) being hung on the first lifting ear plates (620) and fixed by means of a first fastener; The first lifting ear plate (620) is provided with a first ear plate hole (621) for the first fastener to pass through, and the first air cylinder hanger (700) is provided with a first hanger hole (703) for the first fastener to pass through.

13. The valve group module according to claim 12, characterized in that: The first air cylinder hanger (700) is a bent piece formed by bending a strip-shaped plate, the first hanger hole (703) is a strip-shaped hole, and the extension direction of the first hanger hole (703) is perpendicular to the width direction of the first air cylinder hanger (700).

14. The valve group module according to claim 12, characterized in that: The first air cylinder hanger (700) comprises a middle fitting portion (701), a fixed installation portion (702) connected to both sides of the middle fitting portion (701), and a support portion (704) connected to a side of the fixed installation portion (702) away from the middle fitting portion (701); The end of the support portion (704) and the middle fitting portion (701) are both welded to the outer wall of the double-chamber air cylinder (300), and the first hanger hole (703) is opened in the fixed installation portion (702).

15. The valve group module according to claim 14, characterized in that: The fixed installation portion (702) transitions to the support portion (704) via a transition portion (705), the transition portion (705) and the fixed installation portion (702) form a first angle, the fixed installation portion (702) and the support portion (704) form a second angle, the first angle is greater than the second angle, and the second angle is an acute angle; The transition portion (705) and the support portion (704) form an obtuse angle.

16. The valve group module according to claim 12, characterized in that: It also includes an air cylinder sling, wherein the air cylinder sling hoist is arranged on the lower side of the double-chamber air cylinder (300) and is fixed on the installation template (600).

17. The valve group module according to claim 11, characterized in that: The installation template (600) is provided with a plurality of second lifting ear plates (630), the acceleration relief air cylinder (400) is provided with a second air cylinder hanger (900), and the second air cylinder hanger (900) is hung on the second lifting ear plates (630) and fixed by a second fastener; The second hanging ear plate (630) is provided with a second ear plate hole (631) for the second fastener to pass through, and the second air cylinder hanger (900) is provided with a second hanger hole for the second fastener to pass through.

18. The valve group module according to claim 11, characterized in that: The mounting template (600) is provided with a control valve mounting portion (650) and a pressure-limiting valve mounting portion (640); the pressure-limiting valve seat (100) is fixed on the pressure-limiting valve mounting portion (640); and the control valve (500) is fixed on the control valve mounting portion (650).

19. The valve group module according to claim 11, characterized in that: The installation template (600) has a bent convex rib portion (610), and a template installation hole (611) is provided on the bent convex rib portion (610). The template installation hole (611) is used to pass a fastener to connect with a support seat (810) on a train crossbeam.

20. The valve group module according to claim 19, characterized in that: The installation template (600) has a rim extending downward, the rim wrapping around two sides of the support seat (810) to limit the position of the installation template (600) along the first direction; A limit block (820) is provided on the support seat (810), and the limit block (820) is used to limit the position of the installation template (600) along a second direction, and the first direction is perpendicular to the second direction.

21. An air brake system, characterized in that: Comprising a valve group module as described in any one of claims 9-20.

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