A pneumatically controlled damping valve with protection measures

Abstract

The present invention discloses a pneumatic control damping valve with protection measures. 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 an air release assembly is provided in the valve body interface IV; a protection interface is further provided on the valve body. The valve body interface III is communicated with the bottom end of the protection interface. A pressure relief valve, a buffer valve assembly and a limit seat are successively arranged in the protection interface; a valve spring is arranged between the inner bottom end of the protection interface and the pressure relief valve; the buffer valve assembly includes a second ejector rod. The second ejector rod is provided with an air release channel, and a buffer assembly is arranged in the air release channel; the limit seat is provided with an exhaust hole which can be communicated with the air release channel; an end cover is fixedly arranged at the opening of the protection interface. A pressure regulating spring is arranged between the end cover and the limit seat, and a pressure relief hole is opened on the end cover; the present invention effectively solves the problem of impact damage caused by instantaneous large impacts generated during the driving of a vehicle, and has the advantages of improving the service life of various components and structures on the pneumatic control damping valve and the air spring, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of damping valves, and specifically to a pneumatically controlled damping valve with protection measures. Background Technique

[0002] Generally, the pressure gas in the range of 10 - 100 MPa is called high-pressure gas; the operating environment of high-pressure gas inside the body of special vehicles is harsh, and high-precision and high-reliability requirements are imposed on high-pressure gas pipeline valves; the existing pneumatic check valves usually have a simple structure and are only applicable to low-pressure gas pipelines and do not have the ability to work under high pressure; moreover, the too-fast flow rate of high-pressure gas is likely to cause damage to the pipeline. When applied to special vehicles, the too-fast release of high-pressure pressure will cause the vehicle body to drop too fast, which is not conducive to the adjustment of the vehicle body height. In the case where special vehicles need to withstand large impact vibrations, the local air pressure borne by the valve parts reaches 27 Mpa; Patent Publication No. CN116336026A specifically discloses a check damping valve for special vehicles, which can meet the working requirements with a local air pressure reaching 30 Mpa, improving the pressure resistance and working performance of the pneumatic check damping valve. However, when special vehicles are driving on off-road roads, the vibrations and impacts are large and frequent, and the sudden impact generated by the vibration causes the local air pressure in the whole system to even reach above 30 Mpa. There is no buffer protection measure and structure in the pneumatic damping valve. The instantaneous large impact generated during the vehicle driving will cause irreversible impact damage to the pneumatic 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 a pneumatically controlled damping valve with protection measures, which integrates a protection device and a pneumatically controlled damping valve, solves the problem of impact damage caused by the instantaneous large impact generated during the vehicle driving, improves the service life of each component and structure on the pneumatic 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 pneumatic damping valve releases the remaining high-pressure gas, reduces the impact generated when the high-pressure gas is released, improves the working life and stability of the pneumatic damping valve and the air spring, and reduces the noise generated by releasing the high-pressure gas, and can effectively solve the problems in the background technique.

[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] Further, the second ejector rod has a stepped shaft structure, and the air release channel is a multi-stepped hole structure that penetrates the second ejector rod vertically. 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 installation hole, and the lower-step hole of the air release channel is the first sealing hole. The diameters of the air release hole, the buffer installation hole, and the first sealing hole increase in sequence. The buffer assembly is installed in the buffer installation hole. A valve seat for sealing is arranged in the first sealing hole. A gas passage hole communicating with the buffer installation hole is formed along the axis of the valve seat for sealing. The pressing part of the pressure relief valve is tightly pressed and sealed against the bottom opening of the gas passage hole. A third sealing member is arranged between the outer wall of the valve seat for sealing and the first sealing hole. A pressing platform for abutting against the bottom of the valve seat for sealing is arranged at the bottom of the second ejector rod at the opening of the first sealing hole.

[0008] Further, the buffer assembly includes a plurality of buffer sheets arranged at intervals in the air release channel. Adjacent buffer sheets are separated by spacer sleeves. An air passing gasket is arranged below the lowermost buffer sheet in the air release channel, and the lowermost buffer sheet and the air passing gasket are also separated by a spacer sleeve. Eccentric small holes are arranged on the buffer sheets. The upper end surface and the lower end surface of the air passing gasket are both corrugated structures, and a plurality of air release small holes are formed in the air passing gasket.

[0009] Further, a plurality of grooves are arranged along the circumferential direction of the upper end surface and the lower end surface of the air passing gasket, and air release small holes are arranged in the grooves. An air release small hole is also arranged at the center of the air passing gasket. The buffer sheets are circular, and the eccentric small holes of adjacent buffer sheets are staggered from each other.

[0010] Further, a guide sleeve is nested below the sealing plug in the protection interface. A shoulder surface is arranged at the bottom end of the guide sleeve. A second stepped surface abutted against the shoulder surface is arranged in the protection interface. An adjusting gasket is arranged between the shoulder surface and the second stepped surface. A second sealing member is arranged 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 arranged 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 stepped surface formed between the guide sleeve positioning hole and the second sealing hole. The bottom of the second ejector rod is slidably nested in the guide sleeve, and the second ejector rod penetrates through the guide sleeve. The pressure relief valve is slidably nested in the guide sleeve.

[0011] Further, a circular groove is formed at the bottom end of the pressure relief valve. The valve spring is nested in the circular groove. A conical head is arranged at the center of the top end of the pressure relief valve. The conical head is the pressing part of the pressure relief valve, and a shoulder is arranged at the bottom end of the circumferential outer wall of the conical head.

[0012] Further, a first stepped surface that can abut against the bottom end of the limit seat is arranged in the protection interface. A conical groove is arranged at the opening of the exhaust hole at the bottom end of the limit seat. The top end of the second ejector rod is a spherical surface, and the spherical surface of the second ejector rod abuts in the conical groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The pneumatic damping valve with protection measures integrates a protection device and a pneumatic damping valve through the control port connector provided in the valve body interface I, the air inlet connector provided in the valve body interface II, the one-way valve assembly provided in the valve body interface III, the air release assembly provided in the valve body interface IV, and the protection assembly provided in the protection interface. It solves the problem of impact damage caused by instantaneous large impacts generated during vehicle driving, improves the service life of various components and structures on the pneumatic damping valve and the air spring, and ensures the working safety and stability of the vehicle body suspension system. Moreover, the damping valve has an integrated modular design with a compact structure, saving installation space. The buffer assembly provided in the buffer valve assembly damps and buffers the high-pressure gas, enabling buffering while the pneumatic damping valve releases the remaining high-pressure gas, reducing the impact generated during the release of high-pressure gas, improving the service life and stability of the pneumatic 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 is a schematic cross-sectional structure diagram of the present invention;

[0015] Figure 2 is Figure 1 a partial enlarged view;

[0016] Figure 3 is a schematic cross-sectional structure diagram of the valve body of the present invention;

[0017] Figure 4 is a top view of the valve body of the present invention;

[0018] Figure 5 is a schematic cross-sectional structure diagram of the protection assembly of the present invention;

[0019] Figure 6 is a schematic cross-sectional structure diagram of the limit seat of the present invention;

[0020] Figure 7 is a schematic cross-sectional structure diagram of the pressure relief valve of the present invention;

[0021] Figure 8 is a schematic cross-sectional structure diagram of the sealing plug of the present invention;

[0022] Figure 9 is a schematic cross-sectional structure diagram of the buffer valve assembly of the present invention;

[0023] Figure 10 is a schematic cross-sectional structure diagram of the second push rod of the present invention;

[0024] Figure 11 is a schematic cross-sectional structure diagram of the guide sleeve of the present invention;

[0025] Figure 12 is a schematic structure diagram of the buffer piece of the present invention;

[0026] Figure 13 Schematic diagram of the air passing gasket structure of the present invention;

[0027] Figure 14 Working principle diagram of the present invention.

[0028] In the figure: 1. Valve body; 11. Valve body interface I; 12. Valve body interface II; 13. Protection interface; 131. Step surface I; 132. Step surface II; 15. Valve body interface III; 16. Valve body passage; 17. Valve body interface IV; 18. Communication cavity; 2. Control port joint; 3. Air inlet joint; 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 I; 010. Air release valve; 011. Plug; 100. Protection assembly; 101. Back-tightening nut; 102. End cover; 103. Air release screw; 104. Filter element; 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 II; 10811. Spherical surface; 10812. Air release hole; 10813. Buffer installation hole; 10814. Sealing hole I; 10815. Pressing platform; 1082. Sleeve; 1083. Buffer sheet; 10831. Eccentric small hole; 1084. Air passing gasket; 10841. Groove; 10842. Air release small hole; 1085. Third seal; 1086. Valve seal seat; 109. Sealing plug; 1091. Guide hole; 1092. Sealing hole II; 1093. Guide sleeve positioning hole; 110. First seal; 111. Guide sleeve; 1111. Shoulder surface; 112. Second seal; 113. Adjusting gasket; 114. Pressure relief valve; 1141. Tapered head; 1142. Vent hole; 1143. Shoulder; 115. Valve spring. Specific embodiments

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0030] Please refer to Figures 1-4, the present invention provides a technical solution: a pneumatic control damping valve with protection measures, including a valve body 1. There are mutually penetrating valve body interfaces II 12, valve body interfaces III 15, and valve body interfaces IV 17 on the valve body 1. There is also a valve body interface I 11 on the valve body 1 that is connected to the valve body interface IV 17. A control port joint 2 is provided in the valve body interface I 11; a valve body passage 16 is provided in the valve body 1, and the valve body interface I 11 and the valve body interface III 15 are vertically penetrated through the valve body passage 16; an air inlet joint 3 is provided in the valve body interface II 12. A damping cone valve assembly 31, a spring III 33, and a spring seat II 32 are sequentially installed in the air inlet joint 3. The spring seat II 32 is threadedly connected to the air inlet joint 3; a one-way valve assembly is provided in the valve body interface III 15. The one-way valve assembly includes a valve body 6, a spring I 5, and a spring seat I 4 sequentially provided in the valve body interface III 15. The spring I 5 is arranged between the valve body 6 and the spring seat I 4. The spring seat I 4 is threadedly connected to the valve body interface III 15; a deflation assembly is provided in the valve body interface IV 17. The deflation assembly includes a push rod I 9, a deflation valve 010, and a plug 011 sequentially provided in the valve body interface IV 17. The plug 011 is threadedly connected to the valve body interface IV 17. A spring II 8 is provided between the bottom end face of the hole in the valve body interface IV 17 and the push rod I 9;

[0031] The damping cone valve assembly 31, the spring seat II 32, the spring seat I 4, and the valve body 6 in the air inlet joint 3 in this embodiment are all prior arts. The structure of this solution will not be described in detail, and reference can be made to the patent document of a one-way damping valve for special vehicles with the patent publication number CN116336026B;

[0032] There is also a protection interface 13 on the valve body 1. A communication cavity 18 that connects the valve body interface III 15 and the bottom end of the protection interface 13 is provided in the valve body 1. A protection assembly 100 is provided in the protection interface 13;

[0033] Please refer to Figures 1-3 , the protection assembly 100 includes a pressure relief valve 114, a buffer valve assembly 108, and a limit seat 107 sequentially provided in the protection interface 13;

[0034] Please refer to Figure 7 , a circular groove is provided at the bottom end of the pressure relief valve 114. A plurality of ventilation 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 interior 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. A shoulder 1143 is provided at the bottom end of the circumferential outer wall of the conical head 1141;

[0035] Please refer to Figures 1-3 、 Figure 5 and Figures 9-10, the buffer valve assembly 108 includes a second ejector rod 1081. The second ejector rod 1081 is provided with an air release channel along its axis. The second ejector rod 1081 has a stepped shaft structure, and the air release channel is a multi-stepped hole structure that penetrates the second ejector rod 1081 up and down. The upper stepped hole of the air release channel is the air release hole 10812, the middle stepped hole of the air release channel is the buffer mounting hole 10813, and the lower stepped hole of the air release channel is the first sealing hole 10814. The diameters of the air release hole 10812, the buffer mounting hole 10813, and the first sealing hole 10814 increase in sequence; a buffer assembly is installed in the buffer mounting hole 10813, and a valve sealing seat 1086 is provided in the first sealing hole 10814. The valve sealing seat 1086 is provided with a gas passage hole communicating with the buffer mounting hole 10813 along its axis, and the pressing part of the pressure relief valve 114 is tightly sealed against the bottom opening of the gas passage hole. A third sealing member 1085 is provided between the outer wall of the valve sealing seat 1086 and the first sealing hole 10814;

[0036] Please refer to Figures 9-10 and Figures 12-13 , the buffer assembly includes a plurality of buffer sheets 1083 spaced in the 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 lowermost buffer sheet 1083 in the buffer mounting hole 10813, and the lowermost buffer sheet 1083 and the air passing gasket 1084 are also separated by a spacer sleeve 1082; the buffer sheets 1083 are circular, and the buffer sheets 1083 are all provided with eccentric small holes 10831, and the eccentric small holes 10831 of adjacent buffer sheets 1083 are staggered from each other; the upper end surface and the lower end surface of the air passing gasket 1084 are both corrugated structures, and the air passing gasket 1084 is provided with a plurality of air release small holes 10842; a plurality of grooves 10841 are provided along the circumferential direction of the upper end surface and the lower end surface of the air passing gasket 1084, and air release small holes 10842 are provided in the grooves 10841, and an air release small hole 10842 is also provided at the center of the air passing gasket 1084;

[0037] Please refer to Figures 1-3 , Figure 5 , Figure 8 and Figure 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;

[0038] See also Figures 1-3 and Figures 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.

[0039] See also Figures 1-14 , the working principle of the present invention is:

[0040] Before the vehicle starts moving, when a certain pressure of gas is introduced through port P and no gas is introduced through port K, the gas pressure pushes the damping cone valve assembly 31 to move away from the bottom end face of the hole in the inner annular 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 spring I 5. At this time, the valve body 6 separates from the bottom end face of the hole of the valve body interface III 15, so that the valve body interface II 12 is connected to the valve body interface III 15, realizing the transfer of gas from port P to port A; when the gas supply through port P stops and no gas is introduced through port K, the damping cone valve assembly 31 and the valve body 6 reset under the action of the spring restoring force respectively, so that the passage between the valve body interface II 12 and the valve body interface III 15 is disconnected, that is, the gas cannot be transferred between port A and port P; when the pressure at port A is higher than the required pressure, the gas supply through port P stops and a certain pressure of gas is introduced through port K. The air release valve 010 moves downward under the action of the gas pressure, pushing the push rod I 9 downward, and at the same time compressing spring II 8 and spring I 5, thus pushing the valve body 6 downward to connect the valve body interface II 12 to the valve body interface III 15. Then the gas at port A passes through the damping cone valve assembly 31, is damped and buffered by the high-pressure gas, and is discharged from port P to balance the pressure at port A and make the pressure at port A stable at the pressure value required by the user.

[0041] During the vehicle's movement, no gas is introduced through ports P and K. The valve body 6 is in a sealed state, and the passage between the valve body interface III 15 and the valve body interface II 12 is disconnected. The pressure gas at port A communicates with the lower part of the protection assembly 100 through the communication cavity 18. The pressure relief valve 114 and the valve seat 1086 are in a sealed state under the action of the valve spring 115 and the pressure regulating spring 106. Therefore, under normal stable road conditions or when the vehicle vibrates slightly, the protection assembly 100 does not work.

[0042] When the vehicle vibrates greatly and generates a strong impact, the working air pressure at port A instantaneously increases. Once the working air pressure exceeds the set safety air pressure, a part of the high-pressure gas will enter the lower part of the buffer valve assembly 108 through the vent hole 1142 on the pressure relief valve 114, pushing the second push rod 1081 of the buffer valve assembly 108, the limit seat 107, and the pressure regulating spring seat 105 at the lower end upward to overcome the elastic force of the pressure regulating spring 106, separating the pressure relief valve 114 from the valve sealing seat 1086. The high-pressure gas flows upward through the gas passage 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 grooves 10841 and air release small holes 10842 provided in the air gasket 1084 facilitate the dispersion of the passing pressure gas, and the pressure gas is subjected to multi-stage buffering through the plurality of buffer sheets 1083 and their eccentric small holes 10831, enabling buffering while the pneumatic 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 pneumatic damping valve and the air spring, and reducing the noise generated due to the release of the 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. Finally, the gas flows upward through the filter sheet 104 and is discharged from port R through the air release screw 103, completing the buffering and discharging of the high-pressure gas;

[0043] When the working gas at port A returns to the normal working pressure, the spring force of the pressure regulating spring 106 is higher than the acting force of the air pressure at the lower part of the protection assembly 100, thereby pushing the limit seat 107 and the buffer valve assembly 108 downward and restoring the sealing between the valve sealing seat 1086 and the pressure relief valve 114, completing one impact protection operation.

[0044] Further, a pressing platform 10815 for abutting against the bottom of the valve sealing seat 1086 is provided at the opening of the sealing hole one 10814 at the bottom of the second push rod 1081; by abutting against the bottom of the valve sealing seat 1086 through the pressing platform 10815, the stability of the valve sealing seat 1086 is improved.

[0045] Further, a first step surface 131 that can abut against the bottom end of the limit seat 107 is provided in the protection interface 13. A conical groove 1072 is provided at the opening of the exhaust hole 1071 at the bottom end of the limit seat 107. 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 in the conical groove 1072; the first step surface 131 plays a role in limiting the downward movement of the limit seat 107; the transmission is stable, sensitive, rapid, and has a fast response speed and stable operation through the abutting and mating of the spherical surface 10811 of the second push rod 1081 and the conical groove 1072 of the limit seat 107.

[0046] The air-controlled damping valve with protection measures disclosed in this embodiment integrates a protection device and an air-controlled damping valve through the control port connector 2 provided in the valve body interface I 11, the air inlet connector 3 provided in the valve body interface II 12, the one-way valve assembly provided in the valve body interface III 15, the air release assembly provided in the valve body interface IV 17, and the protection assembly 100 provided in the protection interface 13, solving the problem of impact damage caused by instantaneous large impacts generated during vehicle driving, improving the service life of various components and structures on the air-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 is compact, saving installation space; the buffer assembly provided in the buffer valve assembly 108 dampens and buffers the high-pressure gas, enabling buffering while the air-controlled damping valve releases the residual high-pressure gas, reducing the impact generated during the release of the high-pressure gas, improving the working life and stability of the air-controlled damping valve and the air spring, and reducing the noise generated due to the release of the high-pressure gas.

[0047] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and 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 further 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 assembly (100) is provided in the protection interface (13); the protection assembly (100) comprises a pressure relief valve (114), a buffer valve assembly (108) and a limit seat (107) which are sequentially provided in the protection interface (13); a plurality of vent holes (1142) are provided on 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 assembly (108) and the limit seat (107) are provided in sequence in the protection interface (13); The pressure relief valve assembly (108) comprises a second push rod (1081), the second push rod (1081) is provided with a deflation channel along its axis, a buffer assembly for buffering the flow of high-pressure gas is provided in the deflation channel, and a top portion for sealing against the bottom opening of the deflation channel is provided at the top of the pressure relief valve (114); the buffer assembly comprises a plurality of buffer sheets (1083) arranged at intervals in the deflation channel, and adjacent buffer sheets (1083) are separated by spacers (1082); an air-passing gasket (1084) is provided below the buffer sheet (1083) located at the bottom in the deflation channel, and the bottom buffer sheet (1083) is in contact with the air-passing gasket (1084). The gasket (1084) is also separated by a spacer (1082); the buffer plate (1083) is provided with an eccentric small hole (10831); the upper end surface and the lower end surface of the air-passing gasket (1084) are both folded structures; the air-passing gasket (1084) is provided with a plurality of air-release small holes (10842); a sealing plug (109) is fixedly provided at a position corresponding to the second push rod (1081) in the protection interface (13); 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), the second sealing hole (1092) is provided with a first sealing member (110) for movably sealing the second push rod (1081); the limiting 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 limiting 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 limiting 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 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.

6. 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).

7. 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).

8. 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).

9. 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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