Pneumatic control damping valve with protective measures

Abstract

The invention discloses a pneumatic control damping valve with protection measures. An air inlet connector is arranged in a valve body connector II, a one-way valve assembly is arranged in a valve body connector III, and an air bleeding assembly is arranged in a valve body connector IV; the valve body is further provided with a protection connector, the valve body connector III communicates with the bottom end of the protection connector, and a pressure relief valve, a buffering valve assembly and a limiting base are sequentially arranged in the protection connector. A valve spring is arranged between the inner bottom end of the protection interface and the pressure relief valve; the buffering valve assembly comprises a second ejector rod, the second ejector rod is provided with a deflation channel, and a buffering assembly is arranged in the deflation channel. The limiting seat is provided with an exhaust hole which can be communicated with the deflation channel; an end cover is fixedly arranged at an opening of the protection interface, a pressure adjusting spring is arranged between the end cover and the limiting seat, and a pressure relief hole is formed in the end cover; the problem that impact damage is caused by instant large impact generated in the running process of a vehicle is effectively solved, and the pneumatic control damping valve and the air spring have the advantages that the service life of all parts and structures on the pneumatic control damping valve and the air spring is prolonged, and the like.

Description

Technical Field

[0001] The invention relates to the technical field of damping valves, in particular to a gas-controlled damping valve with protective measures. Background Art

[0002] Generally, pressure gas in the range of 10 to 100 MPa is called high-pressure gas; the operating environment of high-pressure gas inside the body of special vehicles is harsh, and high-pressure gas circuit valves are required to have high precision and high reliability; existing gas-controlled one-way valves usually have simple structures and are only suitable for low-pressure gas circuits, and do not have the ability to work at high pressure; and high-pressure gas flow velocity is too fast to easily damage the pipeline. When used on special vehicles, the high-pressure pressure is released too quickly, which will cause the vehicle body to drop too quickly, which is not conducive to the height adjustment of the vehicle body. For special vehicles that need to withstand greater impact and vibration, the local air pressure that the valve components withstand reaches 27Mpa; Patent Publication No. CN116336026A specifically discloses a one-way damping valve for special vehicles, which can meet the working requirements of local air pressure reaching 30Mpa, improving the pressure resistance and working performance of the air-controlled one-way damping valve. However, when special vehicles are traveling on off-road roads, the vibration and impact are large and frequent. The sudden impact caused by the vibration can even cause the local air pressure in the entire system to reach more than 30Mpa. There is an air-controlled damping valve that is not equipped with buffer protection measures and structures. The instantaneous large impact generated by the vehicle during driving will cause irreversible impact damage to the air-controlled damping valve and the air spring, resulting in problems such as short product service life and poor safety. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide an air-controlled damping valve with protection measures, which integrates a protection device and an air-controlled damping valve into one, solves the problem of impact damage caused by instantaneous large impacts generated during the driving of the vehicle, improves the service life of various components and structures on the air-controlled damping valve and the air spring, ensures the working safety and stability of the system, has a compact structure, saves installation space, can buffer while the air-controlled damping valve releases excess high-pressure gas, reduces the impact generated when the high-pressure gas is released, improves the working life and stability of the air-controlled damping valve and the air spring, and reduces the noise generated by the release of high-pressure gas, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas-controlled damping valve with protective measures, comprising a valve body, the valve body is provided with a valve body interface II, a valve body interface III and a valve body interface IV which are interconnected, an air inlet joint is provided in the valve body interface II, a one-way valve assembly is provided in the valve body interface III, and a venting assembly is provided in the valve body interface IV; the valve body is also provided with a protective interface, a connecting cavity which connects the valve body interface III with the bottom end of the protective interface is provided in the valve body, a protective assembly is provided in the protective interface, and the protective assembly comprises a pressure relief valve, a buffer valve assembly and a limit seat which are sequentially provided in the protective interface; a plurality of vent holes are provided on the top of the pressure relief valve, and a valve spring is provided between the bottom end of the protective interface and the pressure relief valve; the buffer valve assembly comprises a push rod II, A venting channel is provided along the axis of the second push rod, and a buffer component for buffering the flow of high-pressure gas is provided in the venting channel, and a tightening portion for sealing against the bottom opening of the venting channel is provided on the top of the pressure relief valve; a sealing plug is fixedly provided at the position corresponding to the second push rod in the protection interface, and a guide hole and a sealing hole two that are interconnected are provided along the axis of the sealing plug, and the top end of the second push rod is slidably nested in the guide hole and the sealing hole two, and a first sealing member for movable sealing of the second push rod is provided in the sealing hole two; an exhaust hole is provided along the axis of the limit seat, and the top end of the second push rod passes through the sealing plug and abuts against the bottom end of the limit seat, and the venting channel is connected to the exhaust hole; an end cover is fixedly provided at the opening of the protection interface, a pressure-adjusting spring is provided between the end cover and the limit seat, and a pressure relief hole is provided on the end cover.

[0005] Furthermore, the valve body is also provided with a valve body interface I connected to the valve body interface IV, and a control port joint is provided in the valve body interface I; a valve body channel is provided in the valve body, and the valve body interface I and the valve body interface III are connected up and down through the valve body channel; the damping cone valve assembly, spring III and spring seat II are installed in sequence in the air inlet joint, and the spring seat II is threadedly connected to the air inlet joint; the one-way valve assembly includes a valve body, a spring I and a spring seat I which are sequentially provided in the valve body interface III, the spring I is arranged between the valve body and the spring seat I, and the spring seat I is threadedly connected to the valve body interface III; the venting assembly includes a push rod 1, a venting valve and a screw plug which are sequentially provided in the valve body interface IV, the screw plug is threadedly connected to the valve body interface IV, and a spring II is arranged between the bottom end face of the hole of the valve body interface IV and the push rod 1.

[0006] Furthermore, the end cover is threadedly connected to the protection interface, and a back-tightening nut is screwed on the end cover; the pressure relief hole provided in the end cover is a screw hole structure, and a bleed screw is screwed in the pressure relief hole; the upper and lower ends of the pressure-regulating spring are provided with pressure-regulating spring seats, the pressure-regulating spring seat at the lower end is fixed on the limit seat, and the pressure-regulating spring seat at the upper end is abutted against the end cover, and the pressure-regulating spring seats at the upper and lower ends are provided with clearance holes along their axes, and a filter plate is fixedly nested in the clearance hole of the pressure-regulating spring seat at the upper end, and the bottom end of the bleed screw presses the filter plate tightly.

[0007] Furthermore, the second push rod is a stepped shaft structure, and the air release channel is a multi-step stepped hole structure that passes through the second push rod up and down, the upper step hole of the air release channel is the air release hole, the middle step hole of the air release channel is the buffer mounting hole, and the lower step hole of the air release channel is the sealing hole one, and the diameters of the air release hole, the buffer mounting hole and the sealing hole one increase successively; the buffer assembly is installed in the buffer mounting hole, and a valve sealing seat is provided in the sealing hole one, and a gas passing hole connected to the buffer mounting hole is opened along the axis of the valve sealing seat, and the tightening part of the pressure relief valve is tightly sealed with the bottom end opening of the gas passing hole, and a third sealing member is provided between the outer wall of the valve sealing seat and the sealing hole one; a pressing platform for abutting the bottom of the valve sealing seat is provided at the opening of the sealing hole one at the bottom of the second push rod.

[0008] Furthermore, the buffer assembly includes a plurality of buffer sheets spaced apart in the air release channel, and adjacent buffer sheets are separated by spacers; an air-permeable gasket is provided below the buffer sheet located at the lowermost side in the air release channel, and the lowermost buffer sheet and the air-permeable gasket are also separated by a spacer sleeve; the buffer sheets are provided with eccentric small holes, and the upper end surface and the lower end surface of the air-permeable gasket are both wrinkled structures, and the air-permeable gasket is provided with a plurality of air release holes.

[0009] Furthermore, the upper and lower end surfaces of the air-permeable gasket are provided with a plurality of grooves along the circumferential direction thereof, and small holes for venting are provided in the grooves, and a small hole for venting is also provided in the center of the air-permeable gasket; the buffer plate is circular, and the eccentric holes of adjacent buffer plates are staggered with each other.

[0010] Furthermore, a guide sleeve is nested at the lower end of the sealing plug in the protection interface, a shoulder surface is provided at the bottom end of the guide sleeve, a step surface two abutting the shoulder surface is provided in the protection interface, and an adjustment gasket is provided between the shoulder surface and the step surface two, and a second sealing member is provided between the outer wall of the guide sleeve and the protection interface; the sealing plug is threadedly connected to the protection interface, a guide sleeve positioning hole is also provided at the bottom end of the sealing plug, the guide sleeve is nested in the guide sleeve positioning hole, and the top end of the guide sleeve abuts against the annular step surface formed between the guide sleeve positioning hole and the second sealing hole; the bottom of the second push rod is slidably nested in the guide sleeve, and the second push rod passes through the guide sleeve; the pressure relief valve is slidably nested in the guide sleeve.

[0011] Furthermore, a circular groove is provided at the bottom end of the pressure relief valve, and the valve spring is nested in the circular groove. A conical head is provided at the center of the top end of the pressure relief valve, and the conical head is the tightening part of the pressure relief valve. A shaft shoulder is provided at the bottom end of the circumferential outer wall of the conical head.

[0012] Furthermore, the protection interface is provided with a step surface 1 that can abut against the bottom end of the limit seat, the bottom end of the limit seat is located at the opening of the exhaust hole and is provided with a conical groove, the top end of the push rod 2 is a spherical surface, and the spherical surface of the push rod 2 abuts against the conical groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the air-controlled damping valve with protection measures, through the control port joint provided in the valve body interface I, the air inlet joint provided in the valve body interface II, the one-way valve assembly provided in the valve body interface III, the venting assembly provided in the valve body interface IV and the protection assembly provided in the protection interface, makes the damping valve integrate the protection device and the air-controlled damping valve into one, solves the problem of impact damage caused by instantaneous large impact generated in the driving process of the vehicle, improves the service life of various components and structures on the air-controlled damping valve and the air spring, and ensures the working safety and stability of the vehicle suspension system; and the integrated modular design of the damping valve has a compact structure and saves installation space; the high-pressure gas is damped and buffered by the buffer assembly provided in the buffer valve assembly, and can be buffered while the air-controlled damping valve releases the remaining high-pressure gas, reducing the impact generated when the high-pressure gas is released, improving the working life and stability of the air-controlled damping valve and the air spring, and reducing the noise generated by the release of high-pressure gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional structural schematic diagram of the present invention; Figure 2 for Figure 1 Partial magnification; Figure 3 This is a schematic diagram of the cross-sectional structure of the valve body of the present invention; Figure 4 It is a top view of the valve body of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the protection component of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the limit seat of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the pressure relief valve of the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the sealing plug of the present invention; Fig. 9 It is a schematic cross-sectional structure diagram of the buffer valve assembly of the present invention; Fig.10 It is a schematic diagram of the cross-sectional structure of the second push rod of the present invention; Fig.11 This is a schematic diagram of the cross-sectional structure of the guide sleeve of the present invention; Fig.12 This is a schematic diagram of the structure of the buffer sheet of the present invention; Fig.13 This is a schematic diagram of the structure of the gasket of the present invention; Fig.14 It is a working principle diagram of the present invention.

[0015] In the figure: 1. Valve body; 11. Valve body interface Ⅰ; 12. Valve body interface Ⅱ; 13. Protection interface; 131. Step surface 1; 132. Step surface 2; 15. Valve body interface Ⅲ; 16. Valve body channel; 17. Valve body interface Ⅳ; 18. Connecting chamber; 2. Control port connector; 3. Inlet connector; 31. Damping cone valve assembly; 32. Spring seat Ⅱ; 33. Spring Ⅲ; 4. Spring seat Ⅰ; 5. Spring Ⅰ; 6. Valve body; 8. Spring Ⅱ; 9. Push rod 1; 010. Vent valve; 011. Screw plug; 100. Protection assembly; 101. Back-tightening nut; 102. End cover; 103. Vent screw; 104. Filter; 105. Pressure regulating spring seat; 106. Pressure regulating spring; 107. Limit seat; 1071. Exhaust hole; 1072. Conical groove; 108. Buffer valve assembly ; 1081, push rod 2; 10811, spherical surface; 10812, vent hole; 10813, buffer installation hole; 10814, sealing hole 1; 10815, pressing table; 1082, spacer; 1083, buffer sheet; 10831, eccentric small hole; 1084, air gasket; 10841, groove; 10842, vent hole; 1085, third sealing member; 108 6. Valve sealing seat; 109. Sealing plug; 1091. Guide hole; 1092. Second sealing hole; 1093. Guide sleeve positioning hole; 110. First sealing member; 111. Guide sleeve; 1111. Shoulder surface; 112. Second sealing member; 113. Adjusting gasket; 114. Pressure relief valve; 1141. Conical head; 1142. Vent hole; 1143. Shoulder; 115. Valve spring. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0017] See also Figure 1-4The present invention provides a technical solution: a gas-controlled damping valve with protective measures, comprising a valve body 1, the valve body 1 is provided with a valve body interface II12, a valve body interface III15 and a valve body interface IV17 which are interconnected, the valve body 1 is also provided with a valve body interface I11 which is connected to the valve body interface IV17, and a control port connector 2 is arranged in the valve body interface I11; a valve body channel 16 is arranged in the valve body 1, and the valve body interface I11 and the valve body interface III15 are vertically connected through the valve body channel 16; an air inlet connector 3 is arranged in the valve body interface II12, and a damping cone valve assembly 31, a spring III33 and a spring seat II32 are sequentially installed in the air inlet connector 3, and the spring seat II 32 is threadedly connected to the air inlet connector 3; a one-way valve assembly is provided in the valve body interface III15, and the one-way valve assembly includes a valve body 6, a spring I5 and a spring seat I4 which are sequentially provided in the valve body interface III15, the spring I5 is arranged between the valve body 6 and the spring seat I4, and the spring seat I4 is threadedly connected to the valve body interface III15; a venting assembly is provided in the valve body interface IV17, and the venting assembly includes a push rod 9, a venting valve 010 and a screw plug 011 which are sequentially provided in the valve body interface IV17, the screw plug 011 is threadedly connected to the valve body interface IV17, and a spring II8 is provided between the bottom end surface of the hole of the valve body interface IV17 and the push rod 9; The damping cone valve assembly 31, spring seat II 32, spring seat I 4 and valve body 6 in the air inlet joint 3 of this embodiment are all prior art, and the present invention does not describe their structures in detail. The patent document of a special one-way damping valve for vehicles disclosed in patent publication number CN116336026B may be referred to; The valve body 1 is also provided with a protection interface 13, and a connecting cavity 18 is provided in the valve body 1 to connect the valve body interface III 15 with the bottom end of the protection interface 13, and a protection component 100 is provided in the protection interface 13; See also Figure 1-3 The protection assembly 100 includes a pressure relief valve 114, a buffer valve assembly 108 and a limit seat 107 which are sequentially arranged in the protection interface 13; See also Figure 7 A circular groove is provided at the bottom end of the pressure relief valve 114, a plurality of vent holes 1142 are provided at the top of the pressure relief valve 114, a valve spring 115 is provided between the bottom end of the inner part of the protection interface 13 and the pressure relief valve 114, the valve spring 115 is nested in the circular groove, a conical head 1141 is provided at the center of the top end of the pressure relief valve 114, and the conical head 1141 is the tightening part of the pressure relief valve 114, and a shaft shoulder 1143 is provided at the bottom end of the circumferential outer wall of the conical head 1141; See also Figure 1-3 , Figure 5 and Figure 9-10The buffer valve assembly 108 includes a second push rod 1081, and the second push rod 1081 is provided with a deflation channel along its axis. The second push rod 1081 is a step shaft structure, and the deflation channel is a multi-step step hole structure that passes through the second push rod 1081 from top to bottom. The upper step hole of the deflation channel is the deflation hole 10812, the middle step hole of the deflation channel is the buffer installation hole 10813, and the lower step hole of the deflation channel is the sealing hole 10814, and the deflation hole 10812, the buffer installation hole 10813 and The diameter of the sealing hole 10814 increases successively; a buffer assembly is installed in the buffer installation hole 10813, a valve sealing seat 1086 is provided in the sealing hole 10814, a gas through hole connected to the buffer installation hole 10813 is opened along its axis by the valve sealing seat 1086, and the top tight portion of the pressure relief valve 114 is tightly sealed with the bottom opening of the gas through hole, and a third sealing member 1085 is provided between the outer wall of the valve sealing seat 1086 and the sealing hole 10814; See also Figure 9-10 and Figure 12-13 The buffer assembly includes a plurality of buffer sheets 1083 spaced apart in a buffer mounting hole 10813, and adjacent buffer sheets 1083 are separated by a spacer sleeve 1082; an air-passing gasket 1084 is provided below the buffer sheet 1083 located at the bottom in the buffer mounting hole 10813, and the bottom buffer sheet 1083 and the air-passing gasket 1084 are also separated by a spacer sleeve 1082; the buffer sheet 1083 is circular, and each of the buffer sheets 1083 is provided with an eccentric small hole 108 31, the eccentric holes 10831 of adjacent buffer sheets 1083 are staggered with each other; the upper end surface and the lower end surface of the air-passing gasket 1084 are both pleated structures, and a plurality of air-release holes 10842 are provided on the air-passing gasket 1084; the upper end surface and the lower end surface of the air-passing gasket 1084 are both provided with a plurality of grooves 10841 along the circumferential direction thereof, and the grooves 10841 are each provided with an air-release hole 10842, and the center of the air-passing gasket 1084 is also provided with an air-release hole 10842; See also Figure 1-3 , Figure 5 , Figure 8 and Fig.11A sealing plug 109 is threadedly connected at the position corresponding to the second push rod 1081 in the protection interface 13. The sealing plug 109 is provided with a guide hole 1091, a second sealing hole 1092 and a guide sleeve positioning hole 1093 which are interconnected along its axis. The top end of the second push rod 1081 passes through the guide sleeve positioning hole 1093 and is slidably nested in the guide hole 1091 and the second sealing hole 1092. The second sealing hole 1092 is provided with a first sealing member 110 which is movably sealed to the second push rod 1081. A guide sleeve 111 is nested at the lower end of the sealing plug 109 in the protection interface 13. A shoulder surface 1111 is provided at the bottom end of the guide sleeve 111. A second step surface 132 abutting against the shoulder surface 1111 is provided in the port 13, and an adjustment gasket 113 is provided between the shoulder surface 1111 and the second step surface 132, and a second sealing member 112 is provided between the outer wall of the guide sleeve 111 and the protective interface 13; the guide sleeve 111 is nested in the guide sleeve positioning hole 1093, and the top of the guide sleeve 111 abuts against the annular step surface formed between the guide sleeve positioning hole 1093 and the second sealing hole 1092; the bottom of the second push rod 1081 is slidably nested in the guide sleeve 111, and the second push rod 1081 passes through the guide sleeve 111; the pressure relief valve 114 is slidably nested in the guide sleeve 111; See also Figure 1-3 and Figure 5-7 The limit seat 107 is provided with an exhaust hole 1071 along its axis, the top end of the second push rod 1081 passes through the sealing plug 109 and abuts against the bottom end of the limit seat 107, and the exhaust channel is connected to the exhaust hole 1071; the opening of the protection interface 13 is threadedly connected with the end cover 102, and the end cover 102 is also screwed with a back-tightening nut 101, and the end cover 102 is provided with a pressure relief hole with a screw hole structure, and a venting screw 103 is screwed in the pressure relief hole; the end cover 102 and the limit seat 1 07, a pressure-regulating spring 106 is provided between the upper and lower ends of the pressure-regulating spring 106, and pressure-regulating spring seats 105 are provided at the upper and lower ends, the pressure-regulating spring seat 105 at the lower end is fixed on the limiting seat 107, and the pressure-regulating spring seat 105 at the upper end is abutted against the end cover 102, and the pressure-regulating spring seats 105 at the upper and lower ends are provided with clearance holes along their axes, and a filter plate 104 is fixedly nested in the clearance hole of the pressure-regulating spring seat 105 at the upper end, and the bottom end of the bleed screw 103 presses the filter plate 104 tightly.

[0018] See also Figure 1-14 , the working principle of the present invention is: In the preparation stage before the vehicle is driven, a certain pressure of gas is introduced from the P port, and no gas is introduced into the K port. The gas pressure pushes the damping cone valve assembly 31 to move and separate from the bottom end face of the hole of the inner ring cavity of the air inlet joint 3. At the same time, the valve body 6 moves downward under the action of the gas pressure and compresses the spring I5. At this time, the valve body 6 is separated from the bottom end face of the hole of the valve body interface III15, so that the valve body interface II12 is connected with the valve body interface III15, and the gas is transferred from the P port to the A port. When the gas stops entering the P port and the gas does not enter the K port, the damping cone valve assembly 31 and the valve body 6 are reset under the action of the spring restoring force, so that the valve body interface II12 is connected with the valve body interface III15. The passage between port A and port P is disconnected, that is, the gas cannot be transferred between port A and port P; when the pressure of port A is higher than the required pressure, the gas is stopped from entering port P. When a certain pressure of gas is introduced from port K, the deflation valve 010 moves downward under the action of the gas pressure, pushing the push rod 19 downward, and compressing the spring Ⅱ8 and the spring Ⅰ5, thereby pushing the valve body 6 downward, so that the valve body interface Ⅱ12 is connected with the valve body interface Ⅲ15, so that the gas at port A is discharged from port P after being damped and buffered by the damping cone valve assembly 31 to the high-pressure gas, so as to balance the pressure of port A and stabilize the pressure of port A at the pressure value required by the user; When the vehicle is running, no gas enters port P and port K, the valve body 6 is in a sealed state, the passage between valve body interface III15 and valve body interface II12 is disconnected, the pressure gas at port A is connected to the lower part of the protection component 100 through the connecting chamber 18, and the pressure relief valve 114 and the valve sealing seat 1086 are in a sealed state due to the action of the valve spring 115 and the pressure regulating spring 106. Therefore, the protection component 100 does not work under normal stable road conditions or slight vibration of the vehicle.

[0019] When the vehicle vibrates greatly and produces a strong impact, the working air pressure at port A increases instantaneously. Once the working air pressure exceeds the set safety air pressure, part of the high-pressure gas will enter the bottom of the buffer valve assembly 108 through the vent hole 1142 on the pressure relief valve 114, pushing the top rod 1081, the limit seat 107 and the lower end of the pressure regulating spring seat 105 of the buffer valve assembly 108 upward to overcome the elastic force of the pressure regulating spring 106, so that the pressure relief valve 114 is separated from the valve sealing seat 1086, and the high-pressure gas flows upward through the gas through hole provided in the valve sealing seat 1086, and buffers the high-pressure gas flowing through the buffer mounting hole 10813 through the buffer assembly. The specific buffering process of the buffer assembly is as follows: The groove 10841 and the air release hole 10842 are convenient for dispersing the passing pressurized gas, and the pressurized gas is buffered in multiple stages through multiple buffer sheets 1083 and their eccentric holes 10831, so that the air-controlled damping valve can buffer the residual high-pressure gas at the same time, reduce the impact generated when the high-pressure gas is released, improve the service life and stability of the air-controlled damping valve and the air spring, and reduce the noise generated by the release of high-pressure gas. The buffered gas enters the opening of the protection interface 13 through the air release hole 10812 on the second push rod 1081 and the exhaust hole 1071 on the limit seat 107, and finally the gas passes through the filter sheet 104 upward and is discharged from the R port through the air release screw 103, completing the buffer discharge of the high-pressure gas; When the working gas at port A returns to normal working pressure, the spring force of the pressure regulating spring 106 is higher than the force of the air pressure at the bottom of the protection assembly 100, thereby pushing the limit seat 107 and the buffer valve assembly 108 downward, and restoring the seal between the valve sealing seat 1086 and the pressure relief valve 114, thus completing an impact protection operation.

[0020] Furthermore, a pressing platform 10815 for abutting the bottom of the valve sealing seat 1086 is provided at the bottom of the push rod 1081 located at the opening of the sealing hole 10814; the pressing platform 10815 abuts the bottom of the valve sealing seat 1086 to improve the stability of the valve sealing seat 1086.

[0021] Furthermore, the protection interface 13 is provided with a step surface 131 which can abut against the bottom end of the limit seat 107, and a conical groove 1072 is provided at the opening of the exhaust hole 1071 at the bottom end of the limit seat 107, and the top of the second push rod 1081 is a spherical surface 10811, and the spherical surface 10811 of the second push rod 1081 abuts against the conical groove 1072; the step surface 131 plays a limiting role in the descent of the limit seat 107; the transmission is stable through the abutment and cooperation between the spherical surface 10811 of the second push rod 1081 and the conical groove 1072 of the limit seat 107, the reaction is sensitive and rapid, the response speed is fast, and the operation is stable and reliable.

[0022] The pneumatically controlled damping valve with protective measures disclosed in the present embodiment integrates a protective device and a pneumatically controlled damping valve into one by means of a control port connector 2 provided in the valve body interface Ⅰ11, an air inlet connector 3 provided in the valve body interface Ⅱ12, a one-way valve assembly provided in the valve body interface Ⅲ15, an air release assembly provided in the valve body interface Ⅳ17 and a protective assembly 100 provided in the protective interface 13, thereby solving the problem of impact damage caused by instantaneous large impacts generated during the driving of the vehicle, improving the service life of various components and structures on the pneumatically controlled damping valve and the air spring, and ensuring the working safety and stability of the system; moreover, the integrated modular design of the damping valve has a compact structure and saves installation space; the high-pressure gas is damped and buffered by the buffer assembly provided in the buffer valve assembly 108, and can be buffered while the pneumatically controlled damping valve releases the remaining high-pressure gas, thereby reducing the impact generated when the high-pressure gas is released, improving the working life and stability of the pneumatically controlled damping valve and the air spring, and reducing the noise generated by the release of the high-pressure gas.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas-controlled damping valve with protective measures, comprising a valve body (1), the valve body (1) being provided with a valve body interface II (12), a valve body interface III (15) and a valve body interface IV (17) which are interconnected, an air inlet joint assembly being provided in the valve body interface II (12); a one-way valve assembly being provided in the valve body interface III (15); and a venting assembly being provided in the valve body interface IV (17); characterized in that: The valve body (1) is also provided with a protection interface (13). A connecting cavity (18) is provided in the valve body (1) to connect the valve body interface III (15) with the bottom end of the protection interface (13). A protection component (100) is provided in the protection interface (13). The protection component (100) comprises a pressure relief valve (114), a buffer valve component (108) and a limit seat (107) which are sequentially provided in the protection interface (13). A plurality of vent holes (1142) are provided at the top of the pressure relief valve (114). A valve spring (115) is provided between the bottom end of the protection interface (13) and the pressure relief valve (114). The buffer valve component (108) comprises a second push rod (1081). A gas release channel is provided along the axis of the second push rod (1081). A buffer component for buffering the flow of high-pressure gas is provided in the gas release channel. A tightening portion which is tightly sealed against the bottom opening of the gas release channel is provided at the top of the pressure relief valve (114). A sealing plug (109) is fixedly provided in the opening (13) at a position corresponding to the second push rod (1081), and the sealing plug (109) is provided with a guide hole (1091) and a second sealing hole (1092) that are interconnected along its axis. The top end of the second push rod (1081) is slidably nested in the guide hole (1091) and the second sealing hole (1092), and a first sealing member (110) that movably seals the second push rod (1081) is provided in the second sealing hole (1092). The limit seat (107) is provided with an exhaust hole (1071) along its axis, the top end of the second push rod (1081) passes through the sealing plug (109) and abuts against the bottom end of the limit seat (107), and the exhaust channel is connected to the exhaust hole (1071); an end cover (102) is fixedly provided at the opening of the protection interface (13), a pressure regulating spring (106) is provided between the end cover (102) and the limit seat (107), and a pressure relief hole is provided on the end cover (102).

2. The gas-controlled damping valve with protective measures according to claim 1, characterized in that: The valve body (1) is further provided with a valve body interface I (11) which is connected to the valve body interface IV (17), and a control port joint (2) is provided in the valve body interface I (11); a valve body channel (16) is provided in the valve body (1), and the valve body interface I (11) and the valve body interface III (15) are vertically connected through the valve body channel (16).

3. The gas-controlled damping valve with protective measures according to claim 1, characterized in that: The end cover (102) is threadedly connected to the protection interface (13), and a back-tightening nut (101) is also screwed on the end cover (102); the pressure relief hole provided on the end cover (102) is a screw hole structure, and a bleed screw (103) is screwed in the pressure relief hole; the upper and lower ends of the pressure regulating spring (106) are provided with pressure regulating spring seats (105), the pressure regulating spring seat (105) at the lower end is fixed on the limit seat (107), the pressure regulating spring seat (105) at the upper end is in contact with the end cover (102), the pressure regulating spring seats (105) at the upper and lower ends are provided with clearance holes along their axes, a filter plate (104) is fixedly embedded in the clearance hole of the pressure regulating spring seat (105) at the upper end, and the bottom end of the bleed screw (103) presses the filter plate (104) tightly.

4. The gas-controlled damping valve with protective measures according to claim 1, characterized in that: The second push rod (1081) is a stepped shaft structure, and the deflation channel is a multi-step stepped hole structure that passes through the second push rod (1081) from top to bottom. The upper step hole of the deflation channel is the deflation hole (10812), the middle step hole of the deflation channel is the buffer installation hole (10813), and the lower step hole of the deflation channel is the sealing hole 1 (10814). The diameters of the deflation hole (10812), the buffer installation hole (10813) and the sealing hole 1 (10814) increase in sequence. The buffer assembly is installed in the buffer installation hole (10813), and the sealing hole 1 (10814) is installed in the buffer installation hole (10814). A valve sealing seat (1086) is provided, and a gas passage hole connected to the buffer mounting hole (10813) is provided along the axis of the valve sealing seat (1086), and the pressing portion of the pressure relief valve (114) is pressed and sealed with the bottom opening of the gas passage hole, and a third sealing member (1085) is provided between the outer wall of the valve sealing seat (1086) and the sealing hole 1 (10814); a pressing platform (10815) for abutting against the bottom of the valve sealing seat (1086) is provided at the bottom of the push rod 2 (1081) located at the opening of the sealing hole 1 (10814).

5. The gas-controlled damping valve with protective measures according to claim 1, characterized in that: The buffer assembly comprises a plurality of buffer sheets (1083) arranged at intervals in the air release channel, and adjacent buffer sheets (1083) are separated by spacers (1082); an air-passing gasket (1084) is arranged below the buffer sheet (1083) located at the bottom in the air release channel, and the bottom buffer sheet (1083) and the air-passing gasket (1084) are also separated by the spacer (1082); the buffer sheets (1083) are each provided with an eccentric small hole (10831), the upper end surface and the lower end surface of the air-passing gasket (1084) are both of a pleated structure, and the air-passing gasket (1084) is provided with a plurality of air release small holes (10842).

6. The gas-controlled damping valve with protective measures according to claim 5, characterized in that: The upper end surface and the lower end surface of the air-passing gasket (1084) are both provided with a plurality of grooves (10841) along the circumferential direction thereof, and each groove (10841) is provided with a small air release hole (10842), and the center of the air-passing gasket (1084) is also provided with a small air release hole (10842); the buffer plate (1083) is circular, and the eccentric small holes (10831) of adjacent buffer plates (1083) are staggered with each other.

7. The gas-controlled damping valve with protective measures according to claim 1, characterized in that: A guide sleeve (111) is embedded in the protective interface (13) at the lower end of the sealing plug (109); a shoulder surface (1111) is provided at the bottom end of the guide sleeve (111); a second step surface (132) abutting against the shoulder surface (1111) is provided in the protective interface (13); an adjustment gasket (113) is provided between the shoulder surface (1111) and the second step surface (132); a second sealing member (112) is provided between the outer wall of the guide sleeve (111) and the protective interface (13); the sealing plug (109) and the protective interface (13) are connected to each other. ) threaded connection, the bottom end of the sealing plug (109) is also provided with a guide sleeve positioning hole (1093), the guide sleeve (111) is nested in the guide sleeve positioning hole (1093), and the top end of the guide sleeve (111) abuts against the annular step surface formed between the guide sleeve positioning hole (1093) and the second sealing hole (1092); the bottom of the second push rod (1081) is slidably nested in the guide sleeve (111), and the second push rod (1081) passes through the guide sleeve (111); the pressure relief valve (114) is slidably nested in the guide sleeve (111).

8. The gas-controlled damping valve with protective measures according to claim 1, characterized in that: A circular groove is formed at the bottom end of the pressure relief valve (114), and a valve spring (115) is nested in the circular groove. A conical head (1141) is provided at the center of the top end of the pressure relief valve (114), and the conical head (1141) is a tightening part of the pressure relief valve (114). A shaft shoulder (1143) is provided at the bottom end of the circumferential outer wall of the conical head (1141).

9. The gas-controlled damping valve with protective measures according to claim 1, characterized in that: The protection interface (13) is provided with a step surface (131) that can abut against the bottom end of the limit seat (107); the bottom end of the limit seat (107) is provided with a conical groove (1072) at the opening of the exhaust hole (1071); the top end of the second push rod (1081) is a spherical surface (10811), and the spherical surface (10811) of the second push rod (1081) abuts against the conical groove (1072).

10. The gas-controlled damping valve with protective measures according to claim 1, characterized in that: The air inlet joint assembly comprises an air inlet joint (3) provided in a valve body interface II (12), wherein a damping cone valve assembly (31), a spring III (33) and a spring seat II (32) are installed in sequence in the air inlet joint (3), and the spring seat II (32) is threadedly connected to the air inlet joint (3); the one-way valve assembly comprises a valve body (6), a spring I (5) and a spring seat I (4) provided in sequence in the valve body interface III (15), wherein the spring I (5) is provided between the valve body (6) and the spring seat I (4), and the spring seat I (4) is threadedly connected to the valve body interface III (15); the air release assembly comprises a push rod I (9), an air release valve (010) and a screw plug (011) provided in sequence in the valve body interface IV (17), and the screw plug (011) is threadedly connected to the valve body interface IV (17), and a spring II (8) is provided between the bottom end surface of the hole of the valve body interface IV (17) and the push rod I (9).

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