Stroke detection high instantaneous response pneumatic control valve for micro vibration field

Abstract

The invention relates to the field of pneumatic control valves, in particular to a high-transient-response pneumatic control valve for stroke detection in the field of micro-vibration, which comprises a base and an ejector rod. A groove is formed in the upper end of the base, a valve shell is slidably arranged on the inner wall of the upper end of the base, a valve deck is fixedly connected to the upper end of the valve shell, and a disc spring is fixedly connected to the lower end of the valve deck. By arranging the port P, the port A and the exhaust port, when the ejector rod rebounds for a small distance after being pressed down, the valve element rebounds and moves for a small distance under the action of the reset spring at the lower end of the valve element, so that a small gradual gap is formed among the port A, the lower edge of the valve sleeve and the valve element, the port A is communicated with the exhaust port, pressure difference exists, and airflow from the port A to the exhaust port is generated; the problem that when a piston valve in the prior art is used, it is difficult to effectively change the size of a parallel connection hole by changing the position of a piston valve element to achieve compression and recovery of an ejector rod is solved.

Description

Technical Field

[0001] The invention belongs to the field of pneumatic control valves, and in particular relates to a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field. Background Art

[0002] At present, air spring vibration isolation devices are almost always used in ultra-fine processing, testing, scientific experiments and other fields that have increasingly stringent requirements on environmental vibration. Air spring vibration isolation devices must be equipped with a height control valve that can automatically adjust the level so that the air spring vibration isolation device can effectively isolate the influence of external vibration.

[0003] At present, the traditional bottom valve plays the role of ventilation during the compression / relaxation of the push rod. The force generated by the pressure drop only acts on the piston rod area, and a relatively large pressure must be generated to obtain a useful force. When the pneumatic control valve in the prior art is in use, the self-balancing adjustment of the platform is achieved through the inflation and ventilation of the valve and energy conversion. However, when the piston valve in the prior art is in use, it is difficult to effectively change the size of the parallel hole by changing the position of the piston valve core to achieve compression and recovery of the push rod.

[0004] Therefore, a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field is proposed. The size of the parallel hole can be effectively changed by changing the position of the piston valve core to achieve compression and recovery of the push rod. Summary of the invention

[0005] In order to overcome the problem that it is difficult to effectively change the size of the parallel hole by changing the position of the piston valve core to achieve compression and recovery of the push rod when the piston valve in the prior art is in use, a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field is proposed.

[0006] The technical solution of the present invention is: a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field, comprising a base and a push rod; a groove body is provided at the upper end of the base, a valve housing is slidably provided on the inner wall of the upper end of the base, a valve cover is fixedly connected to the upper end of the valve housing, a disc spring is fixedly connected to the lower end of the valve cover, a valve sleeve is slidably provided on the inner wall of the valve housing, a return spring is fixedly connected to the lower end of the valve sleeve, a muffler body is fixedly connected to the lower end of the return spring, and the lower end of the muffler body passes through the lower end of the valve housing and extends to the bottom of the valve housing. A muffler seat is fixedly connected to the lower part of the inner wall of the valve housing, and the lower end of the muffler seat is fitted with the upper end of the muffler body. A valve core is slidably arranged on the inner wall of the valve sleeve, and the upper end of the valve core is fixedly connected to the lower end of the push rod. An oil-containing bearing is fixedly connected to the inner wall of the upper end of the valve cover, and the push rod is slidably arranged on the inner wall of the oil-containing bearing. A fixing spring is fixedly connected to the lower end of the valve housing, and the lower end of the fixing spring is fixedly connected to the bottom surface of the inner wall of the groove body. A P port and an A port are penetrated through the side wall of the base, and the P port and the A port correspond to each other. An exhaust port is penetrated through the lower end of the base.

[0007] Preferably, when in use, there are two external interfaces P and A on the upper side of the valve housing, the P port is connected to the external air source, the A port is connected to the vibration isolator cylinder, and the exhaust port is located below the muffler. The function of the entire valve is realized around the three ports of the P port, the A port and the exhaust port. Function 1: Height adjustment The P and A ports on the valve housing are installed with air pipe joints during use. The base, set spring and height adjustment nut are the peripheral parts of the valve, which play the role of precisely adjusting the height of the valve body. Then, fix one end of the set spring on the base and the other end against the valve housing. By rotating the height adjustment nut, the height adjustment nut presses the joints of the P and A ports. The height adjustment nut moves up and down under the guidance of the thread. With the help of the set spring, the valve housing can move up and down under the guidance of the height adjustment nut thread. The height of the valve is adjusted; Function 2: Airflow Guidance The air flow and disconnection between the P port, A port and the exhaust port is completed by pressing down and retracting the push rod to complete the connection and disconnection of the channel. The valve is mainly composed of key parts such as the valve housing, push rod, valve core, valve sleeve, reset spring, and muffler body. Among them, the push rod can sense the change in height. Stroke detection is realized in the field of micro-vibration. The push rod passes through the oil-containing bearing, which is fixed inside the valve cover. The oil-containing bearing plays a role in lubrication, sealing, and guiding the push rod. The valve cover is locked in the valve housing through a special wrench with fine teeth. The other end of the push rod is close to the valve core. The other end of the valve core is tightly connected together under the action of the reset spring. The connection between the valve core and the reset spring is fixed by a boss. The other end of the reset spring is fixed on the muffler seat. The muffler seat is inside the valve housing and is pressed by the reset spring. There is a threaded hole in the middle of the muffler seat. The threaded hole is used to fix the muffler body. The valve sleeve passes through the disc spring and is pressed into the valve housing under the action of the valve cover. There is a gap between the valve sleeve and the valve core. The valve core can move up and down driven by the push rod. There are grooves in the valve housing that correspond to the air flow channel. The valve sleeve has a diamond-shaped hole and an inclined hole for the oil-containing bearing, so that when the push rod moves, the air flow channel can be opened or closed according to the position of the push rod; When the push rod is not pressed down, the airflow passing through the P port reaches the annular groove through the straight hole along the axial direction of the valve housing. Then it enters the annular groove of the valve core along the inclined hole of the valve sleeve. At this time, the step of the valve core just blocks the airway entering the A port. The P port is not connected to the A port. At the same time, since the P port and the exhaust port are not connected by any channel, the P port and the exhaust port are also not connected; When the push rod is pressed down a very small distance, the valve core moves down a small distance under the action of the push rod. The airflow passing through the P port reaches the annular groove through the straight hole along the axial direction of the valve body. Then it enters the annular groove of the valve core along the inclined hole of the valve sleeve. Because the push rod is pressed down a very small distance, at this time, a very small gap that gradually increases appears between the valve core, the valve sleeve and the valve body. The P port is connected to the A port, and the P port takes in air and the A port exhausts air. At the same time, because the P port and the exhaust port are not connected by any channel, the P port and the exhaust port are also blocked. Therefore, at this stage, the P port and the A port generate airflow due to the pressure difference, realizing the inflation function of the vibration isolator; When the push rod rebounds a small distance after being pressed down, the valve core rebounds a small distance under the action of the return spring at the lower end of the valve core, so that a small gap appears between port A, the lower edge of the valve sleeve and the valve core, and port A is connected with the exhaust port, and there is a pressure difference, which generates an airflow from port A to the exhaust port, realizing the degassing function of the vibration isolator, thereby solving the problem that it is difficult to effectively change the size of the parallel hole by changing the position of the piston valve core to realize the compression and recovery of the push rod when the piston valve in the prior art is used.

[0008] Preferably, the upper outer wall of the base is provided with an external thread, and a height adjustment nut is threadedly mounted on the upper outer wall of the base.

[0009] Preferably, the base is in a bolt shape, the upper end of the base is an opening, and the inner diameter of the exhaust port is smaller than the inner diameter of the limiting groove.

[0010] Preferably, the upper end of the valve housing is located above the upper end of the base.

[0011] Preferably, there is a gap between the lower end of the valve housing and the bottom surface of the inner wall of the tank body.

[0012] Preferably, the upper end of the push rod is located at the upper end of the oil-containing bearing. Preferably, two corresponding limiting grooves are formed through the side wall of the base, and the upper ends of the limiting grooves pass through the upper end of the base.

[0013] Preferably, the upper end of the oil-containing bearing is flush with the upper end of the valve cover.

[0014] Preferably, there is a gap between the valve sleeve and the valve core.

[0015] Preferably, a groove is provided in the valve housing, and two diamond-shaped holes and one oblique hole are provided through the inner and outer walls of the valve sleeve.

[0016] Beneficial effects of the present invention: There are two external interfaces P and A on the upper side of the valve housing, the P port is connected to the external air source, the A port is connected to the vibration isolator cylinder, and the exhaust port is located below the muffler. The function of the entire valve is realized around the three ports of the P port, the A port and the exhaust port. Function 1: Height adjustment The P port and the A port on the valve housing are installed with air pipe joints during use. The base, the fixing spring and the height adjustment nut are the peripheral parts of the valve, which play the role of precisely adjusting the height of the valve body. Then, one end of the fixing spring is fixed on the base, and the other end is against the valve housing. By rotating the height adjustment nut, the height adjustment nut presses the joints of the P port and the A port. The height adjustment nut moves up and down under the guidance of the thread. With the assistance of the fixing spring, the valve housing can move up and down under the guidance of the height adjustment nut thread to complete the adjustment of the valve height. Function 2: Airflow Guidance The air flow and disconnection between the P port, A port and the exhaust port is completed by pressing down and retracting the push rod to complete the connection and disconnection of the channel. The valve is mainly composed of key parts such as the valve housing, push rod, valve core, valve sleeve, reset spring, and muffler body. Among them, the push rod can sense the change in height. Stroke detection is realized in the field of micro-vibration. The push rod passes through the oil-containing bearing, which is fixed inside the valve cover. The oil-containing bearing plays a role in lubrication, sealing, and guiding the push rod. The valve cover is locked in the valve housing through a special wrench with fine teeth. The other end of the push rod is close to the valve core. The other end of the valve core is tightly connected together under the action of the reset spring. The connection between the valve core and the reset spring is fixed by a boss. The other end of the reset spring is fixed on the muffler seat. The muffler seat is inside the valve housing and is pressed by the reset spring. There is a threaded hole in the middle of the muffler seat. The threaded hole is used to fix the muffler body. The valve sleeve passes through the disc spring and is pressed into the valve housing under the action of the valve cover. There is a gap between the valve sleeve and the valve core. The valve core can move up and down driven by the push rod. There are grooves in the valve housing that correspond to the air flow channel. The valve sleeve has a diamond-shaped hole and an inclined hole for the oil-containing bearing, so that when the push rod moves, the air flow channel can be opened or closed according to the position of the push rod; When the push rod is not pressed down, the airflow passing through the P port reaches the annular groove through the straight hole along the axial direction of the valve housing. Then it enters the annular groove of the valve core along the inclined hole of the valve sleeve. At this time, the step of the valve core blocks the airway entering the A port, and the P port and the A port are blocked. At the same time, since the P port and the exhaust port are not connected by any channel, the P port and the exhaust port are also blocked; When the push rod is pressed down a very small distance, the valve core moves down a small distance under the action of the push rod. The airflow passing through the P port reaches the annular groove through the straight hole along the axial direction of the valve body. Then it enters the annular groove of the valve core along the inclined hole of the valve sleeve. Because the push rod is pressed down a very small distance, at this time, a very small gap that gradually increases appears between the valve core, the valve sleeve and the valve body, and the P port is connected to the A port, and the P port takes in air and the A port exhausts air. At the same time, because the P port and the exhaust port are not connected by any channel, the P port and the exhaust port are also blocked. Therefore, at this stage, the P port and the A port generate airflow due to the pressure difference, realizing the inflation function of the vibration isolator; When the push rod rebounds a very small distance after being pressed down, the valve core rebounds and moves a small distance under the action of the return spring at the lower end of the valve core, so that a very small and gradually visible gap appears between port A, the lower edge of the valve sleeve and the valve core. Port A is connected to the exhaust port, and there is a pressure difference, which generates an airflow from port A to the exhaust port, realizing the air release function of the vibration isolator, solving the problem in the prior art that it is difficult to effectively change the size of the parallel hole by changing the position of the piston valve core to realize the compression and recovery of the push rod when the piston valve is in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 What is shown is a three-dimensional structural schematic diagram of a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field of the present invention; Figure 2 Shown is a cross-sectional view of a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field according to the present invention; Figure 3 Shown is a three-dimensional structural schematic diagram of a height adjustment nut of a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field according to the present invention; Figure 4 Shown is a schematic diagram of the three-dimensional structure of a valve sleeve of a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field of the present invention; Figure 5 What is shown is a schematic diagram of a cross-sectional three-dimensional structure of a valve housing of a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field according to the present invention; Figure 6 Shown is a three-dimensional split structure schematic diagram of a height adjustment nut and a base of a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field of the present invention; Figure 7 Shown is a three-dimensional structural schematic diagram of a P port of a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field according to the present invention; Figure 8 Shown is a three-dimensional structural schematic diagram of port A of a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field of the present invention; Fig. 9 What is shown is a cross-sectional three-dimensional structure schematic diagram of a base of a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field of the present invention; Fig.10 Shown is a schematic diagram of the three-dimensional structure of a valve housing of a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field according to the present invention.

[0018] The markings in the attached drawings are: 1. push rod; 2. oil-containing bearing; 3. valve cover; 4. disc spring; 5. height adjustment nut; 6. valve core; 7. valve sleeve; 8. valve body; 9. return spring; 10. muffler body; 11. tightening spring; 12. base; 13. muffler seat; 14. P port; 15. A port; 16. slot body; 17. exhaust port; 18. limit slot. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] See also Figure 1-Figure 10 The present invention provides an embodiment: a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field, comprising a base 12 and a push rod 1; a groove body 16 is provided at the upper end of the base 12, a valve housing 8 is slidably provided on the inner wall of the upper end of the base 12, a valve cover 3 is fixedly connected to the upper end of the valve housing 8, a disc spring 4 is fixedly connected to the lower end of the valve cover 3, a valve sleeve 7 is slidably provided on the inner wall of the valve housing 8, a return spring 9 is fixedly connected to the lower end of the valve sleeve 7, a muffler body 10 is fixedly connected to the lower end of the return spring 9, the lower end of the muffler body 10 passes through the lower end of the valve housing 8 and extends to the bottom of the valve housing 8, and the valve housing 8 is provided with a valve cover 3, a disc spring 4 is fixedly connected to the lower end of the valve cover 3, a valve sleeve 7 is slidably provided on the inner wall of the valve housing 8, a return spring 9 is fixedly connected to the lower end of the return spring 9, a muffler body 10 is fixedly connected to the lower end of the muffler body 10, the lower end of the muffler body 10 passes through the lower end of the valve housing 8 and extends to the bottom of the valve housing 8, and the valve housing 8 is provided with a valve cover 3, a disc spring 4 is fixedly connected to the lower end of the valve housing 8, and a valve cover 3 is fixedly connected to the lower end of the valve cover 3. A muffler seat 13 is fixedly connected to the lower part of the wall, and the lower end of the muffler seat 13 is fitted with the upper end of the muffler body 10. A valve core 6 is slidably provided on the inner wall of the valve sleeve 7, and the upper end of the valve core 6 is fixedly connected to the lower end of the push rod 1. An oil-containing bearing 2 is fixedly connected to the inner wall of the upper end of the valve cover 3, and the push rod 1 is slidably arranged on the inner wall of the oil-containing bearing 2. A fixing spring 11 is fixedly connected to the lower end of the valve housing 8, and the lower end of the fixing spring 11 is fixedly connected to the bottom surface of the inner wall of the groove body 16. A P port 14 and an A port 15 are penetrated through the side wall of the base 12, and the P port 14 and the A port 15 correspond to each other. An exhaust port 17 is penetrated through the lower end of the base 12.

[0021] When in use, there are two external interfaces P port 14 and A port 15 on the upper side of the valve housing. The P port 14 is connected to the external air source, the A port 15 is connected to the vibration isolator cylinder, and the exhaust port 17 is located below the muffler. The function of the entire valve is realized around the three ports of P port 14, A port 15 and exhaust port 17. The P port 14 and the A port 15 on the valve housing 8 are installed with air pipe joints during use. The base 12, the fixing spring 11 and the height adjustment nut 5 are peripheral components of the valve, which play the function of precisely adjusting the height of the valve body. One end of the fixing spring 11 is fixed to the base 12, and the other end is against the valve housing 8. Then the height adjustment nut 5 is rotated. The height adjustment nut 5 presses the joints of the P port 14 and the A port 15. The height adjustment nut 5 moves up and down under the guidance of the thread. With the assistance of the fixing spring 11, the valve housing 8 can move up and down under the guidance of the thread of the height adjustment nut 5 to complete the adjustment of the height of the valve.

[0022] Since the air flow and disconnection between the P port 14, the A port 15 and the exhaust port 17 are completed by pressing down and retracting the push rod 1 to complete the connection and disconnection of the channel, the valve is mainly composed of key parts such as the valve housing 8, the push rod 1, the valve core 6, the valve sleeve 7, the return spring 9, the muffler body 10, etc.

[0023] Among them, the push rod 1 can sense the change of height and realize stroke detection in the field of micro-vibration. The push rod 1 passes through the oil-containing bearing 2, and the oil-containing bearing 2 is fixed inside the valve cover 3. The oil-containing bearing 2 plays a role in lubrication, sealing, and guiding the push rod 1. The valve cover 3 is locked in the valve housing 8 through a special wrench with fine teeth. The other end of the push rod 1 is close to the valve core 6. The other end of the valve core 6 is tightly connected together under the action of the reset spring 9. The connection between the valve core 6 and the reset spring 9 is fixed by a boss. The other end of the reset spring 9 is fixed on the muffler seat 13. The muffler seat 13 is inside the valve housing 8 and is pressed by the reset spring 9. There is a threaded hole in the middle of the muffler seat 13, and the threaded hole is used to fix the muffler body 10.

[0024] The valve sleeve 7 is pressed into the valve housing 8 by the disc spring 4 under the action of the valve cover 3. There is a gap between the valve sleeve 7 and the valve core 6. The valve core 6 can move up and down under the drive of the push rod 1. There are grooves in the valve housing 8 that can correspond to the air flow channel. The valve sleeve 7 has two diamond-shaped holes and an oblique hole for the oil-containing bearing, so that when the push rod 1 moves, the air flow channel can be opened or closed according to the position of the push rod 1.

[0025] When the push rod 1 is not pressed down, the airflow passing through the P port 14 reaches the annular groove through the straight hole along the axial direction of the valve housing 8. Then it enters the annular groove of the valve core 6 along the inclined hole of the valve sleeve 7. At this time, the step of the valve core 6 just blocks the airway entering the A port 15. The P port 14 is not connected to the A port 15. At the same time, since the P port 14 and the exhaust port 17 are not connected by any channel, the P port 14 and the exhaust port 17 are also not connected; When the push rod 1 is pressed down a very small distance, the valve core 6 moves down a small distance under the action of the push rod 1. The airflow passing through the P port 14 reaches the annular groove through the straight hole along the axial direction of the valve housing 8. Then it enters the annular groove of the valve core 6 along the inclined hole of the valve sleeve 7. Because the push rod 1 is pressed down a very small distance, at this time, a very small gap that gradually increases appears between the valve core 6, the valve sleeve 7 and the valve housing 8. The P port 14 is connected to the A port 15, and the P port 14 takes in air and the A port 15 exhausts air. At the same time, because the P port 14 and the exhaust port 17 are not connected by any channel, the P port 14 and the exhaust port 17 are also blocked. Therefore, at this stage, the P port 14 and the A port 15 generate airflow due to the pressure difference, thereby realizing the inflation function of the vibration isolator; When the push rod 1 rebounds a small distance after being pressed down, the valve core 6 rebounds a small distance under the action of the return spring 9 at the lower end of the valve core 6. This causes a small gap to appear between the A port 15, the lower edge of the valve sleeve 7 and the valve core 6. The A port 15 is connected to the exhaust port 17, and there is a pressure difference, which generates an airflow from the A port 15 to the exhaust port 17, realizing the degassing function of the vibration isolator.

[0026] See also Figure 1 and Figure 2 In this embodiment, the upper outer wall of the base 12 is provided with an external thread, and the upper outer wall of the base 12 is threadedly installed with a height adjustment nut 5, which can improve the protection of the upper end of the base 12.

[0027] See also Figure 1 and Figure 2 In this embodiment, the base 12 is in a bolt shape, the upper end of the base 12 is open, and the inner diameter of the exhaust port 17 is smaller than the inner diameter of the limiting groove 18, so that the gas can be discharged downward through the exhaust port 17.

[0028] See also Figure 1 and Figure 2 In the present embodiment, the upper end of the valve housing 8 is located above the upper end of the base 12 , which makes it convenient for the user to observe the position of the valve housing 8 .

[0029] See also Figure 1 and Figure 2 In this embodiment, there is a gap between the lower end of the valve housing 8 and the bottom surface of the inner wall of the groove body 16, which facilitates the downward movement of the valve housing 8.

[0030] See also Figure 1 and Figure 2 In this embodiment, the upper end of the push rod 1 is located at the upper end of the oil-containing bearing 2. See also Figure 1 and Figure 6 In this embodiment, two corresponding limiting grooves 18 are formed through the side wall of the base 12, and the upper ends of the limiting grooves 18 pass through the upper end of the base 12. By providing the limiting grooves 18, the installation of the trachea joint is facilitated.

[0031] See also Figure 1 and Figure 2 In this embodiment, the upper end of the oil-containing bearing 2 is flush with the upper end of the valve cover 3, which can improve the stability of the oil-containing bearing 2 after installation.

[0032] See also Figure 1 and Figure 2 In this embodiment, there is a gap between the valve sleeve 7 and the valve core 6 to facilitate the flow of gas in the valve core 6.

[0033] See also Figure 1 and Figure 4In this embodiment, a groove is provided in the valve housing 8, and two diamond holes and an inclined hole are provided through the inner and outer walls of the valve sleeve 7, so that when the push rod 1 moves, the air flow channel can be opened or disconnected according to the position of the push rod 1.

[0034] Working principle: There are two external interfaces P port 14 and A port 15 on the upper side of the valve housing. P port 14 is connected to the external air source, A port 15 is connected to the vibration isolator cylinder, and the exhaust port 17 is located below the muffler. The function of the entire valve is realized around these three ports: P port 14, A port 15 and exhaust port 17. The P port 14 and the A port 15 on the valve housing 8 are installed with air pipe joints during use. The base 12, the fixing spring 11 and the height adjustment nut 5 are peripheral components of the valve, which play the function of precisely adjusting the height of the valve body. One end of the fixing spring 11 is fixed to the base 12, and the other end is against the valve housing 8. Then the height adjustment nut 5 is rotated. The height adjustment nut 5 presses the joints of the P port 14 and the A port 15. The height adjustment nut 5 moves up and down under the guidance of the thread. With the assistance of the fixing spring 11, the valve housing 8 can move up and down under the guidance of the thread of the height adjustment nut 5 to complete the adjustment of the height of the valve.

[0035] Since the air flow and disconnection between the P port 14, the A port 15 and the exhaust port 17 are completed by pressing down and retracting the push rod 1 to complete the connection and disconnection of the channel, the valve is mainly composed of key parts such as the valve housing 8, the push rod 1, the valve core 6, the valve sleeve 7, the return spring 9, the muffler body 10, etc.

[0036] Among them, the push rod 1 can sense the change of height and realize stroke detection in the field of micro-vibration. The push rod 1 passes through the oil-containing bearing 2, and the oil-containing bearing 2 is fixed inside the valve cover 3. The oil-containing bearing 2 plays a role in lubrication, sealing, and guiding the push rod 1. The valve cover 3 is locked in the valve housing 8 through a special wrench with fine teeth. The other end of the push rod 1 is close to the valve core 6. The other end of the valve core 6 is tightly connected together under the action of the reset spring 9. The connection between the valve core 6 and the reset spring 9 is fixed by a boss. The other end of the reset spring 9 is fixed on the muffler seat 13. The muffler seat 13 is inside the valve housing 8 and is pressed by the reset spring 9. There is a threaded hole in the middle of the muffler seat 13, and the threaded hole is used to fix the muffler body 10.

[0037] The valve sleeve 7 is pressed into the valve housing 8 through the disc spring 4 under the action of the valve cover 3. There is a gap between the valve sleeve 7 and the valve core 6. The valve core 6 can move up and down under the drive of the push rod 1. There are grooves in the valve housing 8 that can correspond to the air flow channel. The valve sleeve 7 has two diamond-shaped holes and an inclined hole for the oil-containing bearing, so that when the push rod 1 moves, the air flow channel can be opened or closed according to the position of the push rod 1.

[0038] When the push rod 1 is not pressed down, the airflow passing through the P port 14 reaches the annular groove through the straight hole along the axial direction of the valve housing 8, and then enters the annular groove of the valve core 6 along the oblique hole of the valve sleeve 7. At this time, the step of the valve core 6 blocks the air passage entering the A port 15, and the P port 14 is not connected to the A port 15. At the same time, since the P port 14 and the exhaust port 17 are not connected by any channel, the P port 14 and the exhaust port 17 are also not connected; When the push rod 1 is pressed down a very small distance, the valve core 6 moves down a small distance under the action of the push rod 1. The airflow passing through the P port 14 reaches the annular groove through the straight hole along the axial direction of the valve housing 8, and then enters the annular groove of the valve core 6 along the inclined hole of the valve sleeve 7. Since the push rod 1 is pressed down a very small distance, at this time, a very small gap that gradually increases appears between the valve core 6, the valve sleeve 7 and the valve housing 8, and the P port 14 is connected to the A port 15, and the P port 14 takes in air and the A port 15 exhausts air. At the same time, since the P port 14 and the exhaust port 17 are not connected by any channel, the P port 14 and the exhaust port 17 are also blocked. Therefore, at this stage, the P port 14 and the A port 15 generate airflow due to the pressure difference, realizing the inflation function of the vibration isolator; When the push rod 1 rebounds a small distance after being pressed down, the valve core 6 rebounds a small distance under the action of the return spring 9 at the lower end of the valve core 6, so that a small gradual gap appears between the A port 15, the lower edge of the valve sleeve 7 and the valve core 6, and the A port 15 is connected with the exhaust port 17, and there is a pressure difference, which generates an airflow from the A port 15 to the exhaust port 17, realizing the degassing function of the vibration isolator; In addition, when the P port 14 is not pressed down, the air flow from the air source through the P port 14 reaches the groove body 16 through the straight hole along the axial direction of the valve housing 8, and then enters the annular groove of the valve core 6 along the inclined hole of the valve sleeve 7. At this time, the step of the valve core 6 just blocks the air passage entering the A port 15. The A port 15 is connected to the vibration isolator. At this time, the P port 14 and the A port 15 are not connected, so no gas enters the vibration isolator; At the same time, since the P port 14 is not connected to the muffler body 10 port by any channel, the P port 14 is also not connected to the muffler body 10 port, and no gas flows to the muffler body 10 port through the P port 14 at this time; At this time, the red framed step of the valve core 6 will cover the gas flowing from the oblique hole, preventing it from passing through the diamond hole and entering the A port 15 channel; When the push rod 1 is pressed down a very small distance, the valve core 6 moves down a small distance under the action of the push rod 1, and the airflow passing through the P port 14 reaches the groove body 16 through the straight hole along the axial direction of the valve housing 8, and then enters the annular groove of the valve core 6 along the inclined hole of the valve sleeve 7. Since the push rod 1 is pressed down a very small distance, at this time, a very small gap that gradually increases appears between the valve core 6, the valve sleeve 7 and the valve housing 8, and the P port 14 is connected with the A port 15, and the P port 14 takes in air and the A port 15 exhausts air; At the same time, since the P port 14 is not connected to the muffler body 10 port by any channel, the P port 14 is also not connected to the muffler body 10 port. Therefore, at this stage, the P port 14 and the A port 15 generate airflow due to the pressure difference, realizing the inflation function of the vibration isolator; For example, when the push rod is moved down 1mm, a thin gap appears between the step of the valve core 6 and the diamond-shaped port. At this time, the P port 14 and the A port 15 are connected to generate airflow; When the push rod 1 rebounds a very small distance after being pressed down, the valve core 6 rebounds a small distance under the action of the spring at the lower end of the valve core 6, so that a very small gradual gap appears between the A port 15, the lower edge of the valve sleeve 7 and the valve core 6, and the A port 15 is connected to the muffler body 10 port, and there is a pressure difference, which generates an airflow from the A port 15 to the muffler body 10 port, thereby realizing the deflating function of the vibration isolator.

[0039] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field, comprising a base (12) and a push rod (1); characterized in that: A groove body (16) is provided at the upper end of the base (12); a valve housing (8) is slidably provided on the inner wall of the upper end of the base (12); a valve cover (3) is fixedly connected to the upper end of the valve housing (8); a disc spring (4) is fixedly connected to the lower end of the valve cover (3); a valve sleeve (7) is slidably provided on the inner wall of the valve housing (8); a return spring (9) is fixedly connected to the lower end of the valve sleeve (7); a muffler body (10) is fixedly connected to the lower end of the return spring (9); the lower end of the muffler body (10) passes through the lower end of the valve housing (8) and extends to the bottom of the valve housing (8); a muffler seat (13) is fixedly connected to the lower part of the inner wall of the valve housing (8); the lower end of the muffler seat (13) The valve housing (8) is fitted with the upper end of the muffler body (10); a valve core (6) is slidably provided on the inner wall of the valve sleeve (7); the upper end of the valve core (6) is fixedly connected to the lower end of the push rod (1); an oil-containing bearing (2) is fixedly connected to the inner wall of the upper end of the valve cover (3); the push rod (1) is slidably provided on the inner wall of the oil-containing bearing (2); a fixing spring (11) is fixedly connected to the lower end of the valve housing (8); the lower end of the fixing spring (11) is fixedly connected to the bottom surface of the inner wall of the groove body (16); a P port (14) and an A port (15) are penetrated through the side wall of the base (12); the P port (14) and the A port (15) correspond to each other; and an exhaust port (17) is penetrated through the lower end of the base (12).

2. According to claim 1, a pneumatic control valve with high instantaneous response for stroke detection in the micro-vibration field is characterized in that: An outer wall at the upper end of the base (12) is provided with an external thread, and a height adjustment nut (5) is threadedly mounted on the outer wall at the upper end of the base (12).

3. The high instantaneous response pneumatic control valve for stroke detection in the micro-vibration field according to claim 1, characterized in that: The base (12) is in a bolt shape, the upper end of the base (12) is open, and the inner diameter of the exhaust port (17) is smaller than the inner diameter of the limiting groove (18).

4. The high instantaneous response pneumatic control valve for stroke detection in the micro-vibration field according to claim 1, characterized in that: The upper end of the valve housing (8) is located above the upper end of the base (12).

5. The high instantaneous response pneumatic control valve for stroke detection in the micro-vibration field according to claim 1, characterized in that: A gap exists between the lower end of the valve housing (8) and the bottom surface of the inner wall of the groove body (16).

6. The high instantaneous response pneumatic control valve for stroke detection in the micro-vibration field according to claim 1, characterized in that: The upper end of the push rod (1) is located at the upper end of the oil-containing bearing (2).

7. The high instantaneous response pneumatic control valve for stroke detection in the micro-vibration field according to claim 1, characterized in that: Two corresponding limiting grooves (18) are formed through the side wall of the base (12), and the upper ends of the limiting grooves (18) pass through the upper end of the base (12).

8. The high instantaneous response pneumatic control valve for stroke detection in the micro-vibration field according to claim 1, characterized in that: The upper end of the oil-containing bearing (2) is flush with the upper end of the valve cover (3).

9. The high instantaneous response pneumatic control valve for stroke detection in the micro-vibration field according to claim 1, characterized in that: There is a gap between the valve sleeve (7) and the valve core (6).

10. The high instantaneous response pneumatic control valve for stroke detection in the micro-vibration field according to claim 1, characterized in that: A groove is provided in the valve housing (8), and two diamond-shaped holes and one oblique hole are provided through the inner and outer walls of the valve sleeve (7).

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