Pressure control valve and brake system with same
By fixing the baffle and diaphragm with a clamping structure and fasteners, the exhaust structure of the overflow valve is simplified, solving the problem of complex exhaust structures in the prior art and achieving a simple and stable airflow pressure relief effect.
Patent Information
- Application Number
- CN202423156150.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-19
AI Technical Summary
The exhaust structure of the existing overflow valve is complex, resulting in high requirements for the production and assembly process.
The use of a clamping structure and fasteners to fix the baffle and diaphragm simplifies the assembly process of the exhaust structure and ensures smooth airflow depressurization.
A simple and highly stable exhaust structure was achieved, which reduced production costs and improved assembly efficiency.
Smart Images
Figure CN223443513U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of vehicle braking, in particular to a pressure control valve and a brake system with the same. BACKGROUND
[0002] The pressure control valve functions as a one-way conduction in the system. When the upstream system pressure of the overflow valve exceeds the specified value, the overflow valve is opened, and part of the gas in the system is discharged to the downstream through the internal conduction of the overflow valve.
[0003] In the rail vehicle brake system, the overflow valve is often used to supply air to the air suspension system. The specific working mode is as follows: the total air cylinder in the vehicle brake system supplies air to the brake system preferentially, and the overflow valve is conducted when the pressure at the input end of the overflow valve, i.e. the brake system, reaches the specified value, and the pressure enters the air suspension system through the overflow valve to supply air to the air suspension system. After the air flow pressure meets the required brake pressure of the air suspension system, the air pressure in the overflow valve needs to be discharged in time.
[0004] However, the exhaust structure in the current overflow valve is relatively complex, and the process requirement for production and assembly is relatively high. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a pressure control valve and a brake system with the same, and aims at providing an exhaust structure with simple structure and convenient assembly.
[0006] In order to achieve one of the above purposes, the utility model provides a pressure control valve, which comprises:
[0007] A valve body comprising a valve cavity, an air inlet, an air outlet, a pressure relief port, and a fixed shaft arranged at the position of the pressure relief port;
[0008] A diaphragm connected to the fixed shaft, and at least part of the diaphragm covers the pressure relief port;
[0009] A clamping lock connected to the fixed shaft, and the clamping lock is arranged on the side of the diaphragm away from the valve cavity;
[0010] The diaphragm is limited in the pressure relief port by the clamping lock.
[0011] As a further improvement of one embodiment of the utility model, a baffle is connected in the pressure relief port, a fluid outlet communicating with the valve cavity is arranged on the baffle, the diaphragm is arranged on the side of the baffle away from the valve cavity, and the radial projection of the diaphragm completely covers the baffle.
[0012] As a further improvement of the embodiment of the utility model, the diaphragm is provided with a first mounting hole, the diaphragm is sleeved on the fixed shaft through the first mounting hole, the clamping lock is provided with a second mounting hole, and the clamping lock is sleeved on the fixed shaft through the second mounting hole.
[0013] As a further improvement of the embodiment of the utility model, the fixed shaft is provided with a fixing hole in the axial direction, the fixing hole is connected with a fastener, the fastener comprises a fixing part and a connecting part which are connected with each other, the connecting part is connected with the fixing hole, the fixing part is in contact with the end face of the fixed shaft, and at least part of the fixing part extends outward in the radial direction to the outer end edge of the fixed shaft to press the clamping lock.
[0014] As a further improvement of the embodiment of the utility model, the clamping lock is provided with at least two clamping pieces at the position of the second mounting hole, and adjacent clamping pieces are provided with a stress groove which is communicated with the second mounting hole.
[0015] As a further improvement of the embodiment of the utility model, the clamping piece is gradually inclined in the direction of deviating from the diaphragm along the radial direction of the clamping lock.
[0016] As a further improvement of the embodiment of the utility model, the clamping lock comprises an inner ring part and an outer ring part which are connected with each other, the inner ring part is planar, and the outer ring part is arc-shaped and gradually curved away from the diaphragm along the radial direction from inside to outside.
[0017] As a further improvement of the embodiment of the utility model, the connection between the inner ring part and the outer ring part is provided in the form of a circular arc.
[0018] As a further improvement of the embodiment of the utility model, the diaphragm is gradually curved in the direction of deviating from the valve cavity along the radial direction from inside to outside, and in a natural state, a gap for fluid flow is left between the outer end edge of the diaphragm and the inner wall of the pressure relief port.
[0019] As a further improvement of the embodiment of the utility model, the arc curvature of the diaphragm is smaller than that of the outer ring part of the clamping lock.
[0020] In order to realize one of the above purposes, the utility model provides a brake system comprising the pressure control valve.
[0021] Compared with the prior art, the utility model can fix the baffle and the diaphragm by adopting a clamping lock structure and a fastener, the connecting structure provided by the utility model is stable, simple in structure and convenient for assembling the exhaust structure. When the pressure control valve is relieved, the airflow in the valve cavity is discharged to the outside of the valve body through the diaphragm after the pressure relief port is conducted, so that the pressure control valve is relieved smoothly. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a first sectional view of a pressure control valve in the embodiment;
[0023] Figure 2 is Figure 1 is a structural enlarged schematic view of part A in the embodiment;
[0024] Figure 3 is a second sectional view of a pressure control valve in the embodiment, in which the fastener structure is hidden;
[0025] Figure 4 is Figure 3 is a structural enlarged schematic view of part B in the embodiment;
[0026] Figure 5 is a top view of a clamping lock in a pressure control valve in the embodiment;
[0027] Figure 6 is an axonometric view of a clamping lock in a pressure control valve in the embodiment.
[0028] Reference signs:
[0029] 10, valve body; 11, air inlet; 12, air outlet; 13, pressure relief port; 14, fixed shaft; 141, stepped mounting groove; 142, fixed hole; 15, valve cavity; 20, baffle; 21, fluid outlet; 22, third mounting hole; 30, diaphragm; 31, first mounting hole; 40, clamping lock; 41, second mounting hole; 42, clamping piece; 43, stress groove; 44, inner ring part; 45, outer ring part; 50, fastener; 51, fixed part; 52, connecting part. DETAILED DESCRIPTION
[0030] The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model and cannot be interpreted as a limitation of the utility model.
[0031] The terms first, second, third, fourth and the like in the utility model are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features; in addition, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be understood in a broad sense, for example, the connection can be direct connection or indirect connection through an intermediate medium, can be fixed connection or movable connection or detachable connection or integral connection. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0032] In order to enable those skilled in the art to better understand the technical solutions in the utility model, the following will combine the drawings in the embodiment of the utility model to make a better description. Figure 1- 6, the technical scheme in the embodiment of the utility model is clearly and completely described.
[0033] An embodiment of the utility model provides a pressure control valve, refer to Figure 1 , including valve body 10, valve cavity 15 is arranged in valve body 10, valve body 10 is provided with the air inlet 11, gas outlet 12, pressure relief port 13 being linked with valve cavity 15.
[0034] Pressure control valve has pressure supply mode and pressure relief mode, in the operation process of pressure control valve, first enters pressure supply mode, then converts from pressure supply mode to pressure relief mode.Under pressure supply mode, air inlet 11 and gas outlet 12 are in the on state, and pressure relief port 13 is in the closed state, fluid enters valve cavity 15 from air inlet 11, then is discharged from gas outlet 12 to supply pressure to the outside.When the pressure of the outside reaches the preset pressure value, in order to balance the internal and external pressure of control valve, control valve body 10 is made, gas outlet 12 is converted to the closed state, pressure relief port 13 is converted to the on state, and the gas in the pressure control valve is discharged from pressure relief port 13.
[0035] The pressure control valve provided by the utility model can be applied to fluid-driven application scenarios, such as liquid driving or gas driving, and the embodiment takes gas driving as an example for description.
[0036] Refer to Figure 1 - Figure 4 Valve body 10 is provided with fixed shaft 14, fixed shaft 14 is located in pressure relief port 13, as an example, fixed shaft 14 is located at the center position of pressure relief port 13.
[0037] Fixed shaft 14 is located at the center position of pressure relief port 13, that is, the axis of fixed shaft 14 is located at the center position of the cross section of pressure relief port 13.For example, the cross section of pressure relief port 13 is circular, and the axis of fixed shaft 14 substantially coincides with the center of the cross section of pressure relief port 13.
[0038] Pressure relief port 13 is sequentially connected with baffle 20, diaphragm 30 and clamping lock 40 along the direction of airflow, the end of fixed shaft 14 is provided with fastener 50, and fastener 50 abuts against clamping lock 40.Baffle 20 is provided with fluid outlet 21, diaphragm 30 is arranged as a flexible sheet, at least part of diaphragm 30 covers pressure relief port 13, and clamping lock 40 is arranged at the outermost side and can limit and fix baffle 20 and diaphragm 30.
[0039] One clamping lock 40 structure and fastener 50 can fix baffle 20 and diaphragm 30, the connecting structure provided by the utility model is not only stable, but also simple in structure, and convenient for assembly of the exhaust structure.
[0040] When the pressure control valve is released, the gas flow in the valve cavity 15 will flow through the fluid outlet 21 and be discharged to the outside of the valve body 10 from the gap between the flapper 20 and the diaphragm 30. It is easy to understand that the diaphragm 30 will be deformed under the action of the gas flow to form a gap between the diaphragm 30 and the flapper 20 or to make the gap between the diaphragm 30 and the flapper 20 wider.
[0041] The outer peripheral wall of the fixed shaft 14 is provided with a stepped mounting groove 141, and the flapper 20 is provided with a third mounting hole 22 matched with the fixed shaft 14. The flapper 20 is sleeved on the fixed shaft 14 through the third mounting hole 22, and the flapper 20 is matched with the stepped mounting groove 141. The flapper 20 can be installed in the pressure relief port 13, and the structure is simple and convenient to install.
[0042] The outer periphery of the flapper 20 is matched with the shape of the inner wall of the pressure relief port 13. The fluid outlet 21 is arranged in the area between the outer periphery of the flapper 20 and the third mounting hole 22, and a plurality of fluid outlets 21 are arranged along the circumference of the third mounting hole 22, so that the gas flow can be uniformly discharged from the fluid outlet 21.
[0043] The center of the diaphragm 30 is provided with a first mounting hole 31, and the diaphragm 30 is sleeved on the fixed shaft 14 through the first mounting hole 31. The diaphragm 30 is curved from the inside to the outside along the radial direction, that is, the outer periphery of the diaphragm 30 is curved to the side where the clamping lock 40 is located. Therefore, the gap for the gas flow between the diaphragm 30 and the flapper 20 is formed. And in the natural state, there is also a gap between the outer end of the diaphragm 30 and the inner wall of the pressure relief port 13 for the gas flow, which facilitates the discharge of the gas flow from the pressure relief port 13.
[0044] It is easy to understand that in the natural state of the diaphragm 30, the outer periphery of the diaphragm 30 is close to the inner wall of the pressure relief port 13, so that the diaphragm 30 plays a role in isolating dust and impurities, avoiding the entry of external dust or impurities into the valve cavity 15 through the pressure relief port 13, and ensuring the service life of the pressure control valve.
[0045] Referring to Figure 5 and Figure 6 The center of the clamping lock 40 is provided with a second mounting hole 41, and the clamping lock 40 is sleeved on the fixed shaft 14 through the second mounting hole 41. The clamping lock 40 is provided with at least two clamping pieces 42 at the position of the second mounting hole 41, and the side of the clamping piece 42 facing the second mounting hole 41 is in contact with the fixed shaft 14. The adjacent clamping pieces 42 have a stress groove 43 in communication with the second mounting hole 41.
[0046] Under the action of the stress groove 43, the clamping piece 42 has a certain deformation space after being stressed, so that even if there is a certain deviation between the radial size of the second mounting hole 41 and the outer circumferential size of the fixed shaft 14, the clamping piece 42 can be clamped with the outer circumferential wall of the fixed shaft 14 by applying a certain pressure to the clamp 40, so that the clamp 40 is more stably connected to the outside of the fixed shaft 14. Moreover, the machining precision requirement between the clamp 40 and the fixed shaft 14 is reduced, the machining is simple and easy to implement, and the production cost is low.
[0047] The clamping piece 42 is inclined from the outside to the inside along the radial direction of the clamp 40 and gradually deviates from the diaphragm 30. When installing the clamp 40, the inclined clamping piece 42 can play a certain guiding role for the clamp 40. When the clamping piece 42 is inclined to the preset deformation direction, even if a small force is applied to the clamp 40 during installation, the clamp 40 can be easily assembled, avoiding the breakage of the clamping piece 42 due to a large pushing force, and ensuring the smooth assembly of the clamp 40.
[0048] The clamp 40 has an inner ring part 44 and an outer ring part 45 connected to each other, and the inner ring part 44 is provided in a planar shape, i.e., both side walls of the inner ring part 44 in the thickness direction are planar. The planar arrangement of the two sides of the inner ring part 44 allows one side of the inner ring part 44 to be closely attached to the diaphragm 30, thereby playing a role of pressing and limiting the diaphragm 30, and the other side of the inner ring part 44 can be attached to the fastener 50. This structure has more prominent connection stability.
[0049] In the axial direction, the projection of the diaphragm 30 completely covers the projection of the clamp 40, i.e., the diameter of the outer periphery of the diaphragm 30 is greater than the diameter of the outer periphery of the clamp 40. When the pressure control valve is depressurized, the clamp 40 does not affect the deformation of the diaphragm 30, so that the gas flow can be smoothly discharged to the outside of the valve cavity 15.
[0050] The outer ring part 45 is provided in an arc shape, and the outer ring part 45 gradually curves away from the diaphragm 30 from the inside to the outside along the radial direction of the clamp 40, and the arc curvature of the outer ring part 45 is greater than the arc curvature of the diaphragm 30. The outer periphery of the outer ring part 45 gradually curves away from the diaphragm 30, so that a gap for the deformation of the diaphragm 30 is generated between the diaphragm 30 and the clamp 40. When the pressure control valve is depressurized and gas is discharged, the gas flow acts on the diaphragm 30, the diaphragm 30 curves to the side of the clamp 40 to deform, so that the gas flow in the valve cavity 15 is discharged more quickly, the depressurization speed is fast, and the depressurization effect is good.
[0051] The connection between the inner ring part 44 and the outer ring part 45 is provided in a circular arc shape. When the diaphragm 30 deforms, the arc-shaped structure of the clamp 40 can provide a more suitable attachment plane for the diaphragm 30, thereby reducing the impact of the gas flow pressure on the diaphragm 30 and prolonging the service life of the diaphragm 30.
[0052] The inner ring part 44 and the outer ring part 45 are integrally formed, and in alternative embodiments, the inner ring part 44 and the outer ring part 45 can also be in a split structure, which is not specifically limited in the present embodiment.
[0053] It should be noted that the fastener 50 in the present embodiment can be selected from a general screw or bolt structure, which is stable in connection and low in cost. Figure 2 The fixed shaft 14 is provided with a fixing hole 142 in the axial direction, and the opening end of the fixing hole 142 is located at the end face of the fixed shaft 14. The fastener 50 includes a fixing part 51 and a connecting part 52 connected with each other, the connecting part 52 is connected with the fixing hole 142, and the connecting part 52 and the fixing hole 142 are provided with matching thread structures, and the fastener 50 can be fixed by screwing.
[0054] The fixing part 51 is in contact with the end face of the fixed shaft 14, and at least part of the fixing part 51 extends outward in the radial direction to the outer end edge of the fixed shaft 14 to press the clamping lock 40. That is, the outer peripheral region of one side of the fixing part 51 abuts against one side face of the clamping lock 40, and the clamping lock 40 is pressed and fixed by the fixing part 51. It is relatively easy to understand that during installation, the fastener 50 can be screwed to make the fixing part 51 abut against the clamping sheet 42 and / or the inner ring part 44.
[0055] An embodiment of the present application provides a brake system, comprising the pressure control valve. The brake system can be applied to the braking of rail cars and other large vehicles, and can also be applied to the braking of cars and other small vehicles, which is not specifically limited in the present embodiment.
[0056] The above describes the structure, features and effects of the present application according to the embodiments shown in the drawings, and the above is only a preferred embodiment of the present application, but the present application is not limited to the drawings shown, any change or modification made according to the concept of the present application, or the equivalent embodiment of equivalent change, as long as it is within the scope of the present application.
Claims
1. A pressure control valve, characterized in that: include: A valve body (10) comprises a valve cavity (15), an air inlet (11) communicating with the valve cavity (15), an air outlet (12), a pressure relief port (13), and a fixed shaft (14) disposed at the position of the pressure relief port (13); a diaphragm (30) connected to the fixed shaft (14), wherein at least a portion of the diaphragm (30) covers the pressure relief port (13); a clamp lock (40) connected to the fixed shaft (14), wherein the clamp lock (40) is arranged on a side of the diaphragm (30) facing away from the valve chamber (15); The diaphragm (30) is restricted in the pressure relief port (13) by the clamping lock (40).
2. The pressure control valve according to claim 1, characterized in that: A baffle (20) is connected to the pressure relief port (13), and a fluid outlet (21) communicating with the valve cavity (15) is provided on the baffle (20). The diaphragm (30) is provided on a side of the baffle (20) facing away from the valve cavity (15), and a radial projection of the diaphragm (30) completely covers the baffle (20).
3. The pressure control valve according to claim 1, characterized in that: The diaphragm (30) is provided with a first mounting hole (31), and the diaphragm (30) is sleeved on the fixed shaft (14) through the first mounting hole (31); the clamping lock (40) is provided with a second mounting hole (41), and the clamping lock (40) is sleeved on the fixed shaft (14) through the second mounting hole (41).
4. The pressure control valve according to claim 3, characterized in that: The fixed shaft (14) is provided with a fixing hole (142) along the axial direction, and the fixing hole (142) is connected to a fastener (50), and the fastener (50) includes a fixing portion (51) and a connecting portion (52) connected to each other, and the connecting portion (52) is connected to the fixing hole (142), and the fixing portion (51) contacts the end face of the fixed shaft (14), and at least a portion of the fixing portion (51) extends radially outward to the outer end edge of the fixed shaft (14) to press the clamping lock (40).
5. The pressure control valve according to claim 3, characterized in that: The clamp lock (40) is provided with at least two clamping pieces (42) at the position of the second mounting hole (41), and a stress groove (43) communicating with the second mounting hole (41) is provided between adjacent clamping pieces (42).
6. The pressure control valve according to claim 5, characterized in that: The clamping piece (42) is gradually inclined from outside to inside along the radial direction of the clamping lock (40) in a direction away from the diaphragm (30).
7. The pressure control valve according to claim 3, characterized in that: The clamping lock (40) has an inner ring portion (44) and an outer ring portion (45) connected to each other, the inner ring portion (44) is flat, and the outer ring portion (45) is an arcuate surface that gradually bends from the inside to the outside in a radial direction away from the diaphragm (30).
8. The pressure control valve according to claim 7, characterized in that: The connection between the inner ring portion (44) and the outer ring portion (45) is configured in an arc shape.
9. The pressure control valve according to claim 7, characterized in that: The diaphragm (30) is gradually bent radially from the inside to the outside in a direction away from the valve cavity (15). In a natural state, a gap for fluid flow is left between the outer edge of the diaphragm (30) and the inner wall of the pressure relief port (13).
10. The pressure control valve according to claim 9, characterized in that: The camber curvature of the diaphragm (30) is smaller than the camber curvature of the outer ring portion (45) of the clamp (40).
11. A braking system, characterized in that: Comprising the pressure control valve according to any one of claims 1 to 10.