Height valve

Abstract

The utility model discloses an altitude valve which comprises an upper altitude valve group and a lower altitude valve group which are fastened through threads, and an elastic membrane assembly reset spring is installed between the upper altitude valve group and the lower altitude valve group. A valve rod assembly of the height valve upper portion set comprises a pressing rod which is connected with a valve head through a pin shaft and fixed through an elastic blocking piece. An exhaust port is formed in the lower portion of an upper valve body, and the upper valve body and a pressing rod assembly are fixed to the top of the upper valve body in a threaded locking mode through a small round nut. Comprising a guide column, an elastic membrane assembly and an air sealing elastic plug which are sequentially installed in an upper valve body, and the top of a guide rod makes contact with a pressing rod. A valve element assembly and a valve element reset spring of the height valve lower portion set are sequentially installed in a lower valve body, an air inlet and an air outlet are formed in the lower portion of the lower valve body, a tail plug sealing ring is arranged at the root of a tail plug of the lower portion set in a sleeved mode, and then the tail plug is screwed into the lower valve body. Even if the air spring vibration isolation platform fluctuates after exceeding a certain numerical value range, the air spring vibration isolation platform can rapidly recover to be stable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to height valve field, specifically relates to a height valve. BACKGROUND

[0002] At present, air spring vibration isolation platform is mainly composed of platform body, air spring, support installation part, wherein air spring is as the key of its vibration isolation, utilizes its high bearing, low stiffness and other advantages, satisfies the vibration isolation requirement of platform surface, is widely used in the detection of optical element and precision instrument measurement and other sensitive work to vibration. Among them, height valve is the key component of air spring vibration isolation platform, through the height adjustment control of height valve, the inflation and exhaust process of air spring is controlled, so that the platform always keeps at the set height value, realizes relative stability.

[0003] At present, the height valve for air spring on the market is generally in the inflation state, exhaust state and balance state without inflation and exhaust, and is commonly used in guide pillar type 2-position 3-way valve. However, when the air spring vibration isolation platform is used, due to the disturbance of the outside world or the movement of the dynamic load on the platform surface, the overall center of mass is shaken or deviated, the height valve for controlling height will be adjusted, and the existing height valve on the market is too sensitive, which is not conducive to the stability and use of the overall air spring vibration isolation platform. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a height valve, which is suitable for height and attitude adjustment control of air spring vibration isolation platform with dynamic load or air spring vibration isolation platform with low levelness requirement.

[0005] The utility model achieves the purpose by the following technical scheme:

[0006] A height valve, which comprises a height valve upper group and a lower group fastened by threads, and a elastic diaphragm assembly reset spring installed between the two groups;

[0007] The height valve upper group comprises a pressure rod assembly, an upper valve body, a guide column, an elastic diaphragm assembly and a gas sealing elastic plug, the valve rod assembly comprises a valve head, a pressure rod and an elastic baffle, the pressure rod is connected with the valve head through a pin shaft and is fixed through the elastic baffle;

[0008] The upper valve body is provided with an exhaust port at the lower part, and the upper valve body and the pressure rod assembly are fixed and locked through a small round nut and the top of the upper valve body by threads;

[0009] The guide column, the elastic diaphragm assembly and the gas sealing elastic plug are sequentially installed in the upper valve body, and the top of the guide rod is in contact with the pressure rod;

[0010] The high valve lower part group includes a lower valve body, an elastic diaphragm assembly reset spring, a valve core assembly, a valve core reset spring, and a tail plug. The valve core assembly and the valve core reset spring are sequentially installed in the lower valve body, and an air inlet and an air outlet are arranged at the lower part of the lower valve body. A tail plug sealing ring is sleeved at the root of the tail plug, and the tail plug is screwed into the lower valve body.

[0011] Further, the elastic diaphragm assembly includes a diaphragm reinforcing sheet, an elastic diaphragm, and a diaphragm holder. The tail straight mouth of the diaphragm holder passes through the circular hole in the middle of the diaphragm reinforcing sheet and the elastic diaphragm, so that the concave surface of the diaphragm reinforcing sheet faces upward. The elastic diaphragm is clamped between the diaphragm reinforcing sheet and the diaphragm holder, and is extruded to form riveting by a special tool through the straight mouth at the tail of the diaphragm holder.

[0012] Further, the air sealing elastic plug is installed in the mounting hole at the head of the diaphragm holder, and the air sealing elastic plug is in interference fit with the mounting hole at the head of the diaphragm holder, and the air sealing elastic plug is embedded therein.

[0013] Further, the guide column is inserted into the middle through hole installed in the upper valve body, and the elastic diaphragm assembly with the air sealing elastic plug installed is installed in the inner mounting groove at the lower part of the upper valve body.

[0014] Further, the valve core assembly includes a valve core, and a valve core mounting groove is arranged on the top surface of the cylindrical shoulder of the valve core. A valve core sealing ring is embedded in the mounting groove.

[0015] Further, the mounting groove straight mouth of the valve core is extruded and formed into a fastener by a special tool.

[0016] Further, the valve rod assembly is installed in the corresponding installation position at the upper part of the upper valve body. Adjustment screw holes are arranged at the front end and the rear end of the pressure rod, and a pin shaft connecting hole is arranged at the tail. An adjustment short screw is screwed into the rear end adjustment screw hole of the pressure rod, and a lock nut and a spring washer are installed and then screwed into the rear end adjustment screw hole. An adjustment long screw is screwed into the front end adjustment screw hole of the pressure rod, and a lock nut and a spring washer are installed and then screwed into the front end adjustment screw hole. The top end of the adjustment long screw is screwed into the installation pressure rod pressure head. Grooves are arranged at both ends of the pin shaft connecting the pressure rod and the valve head, and elastic stop sheets are installed at both ends.

[0017] Further, the valve core assembly is inserted into the middle through hole installed in the lower valve body, and the valve core reset spring is sleeved into the tail of the valve core assembly installed in the lower valve body. The tail plug sealing ring is sleeved in the root installation groove of the tail plug, and the blind hole in the tail plug is sleeved into the valve core reset spring and the tail of the valve core assembly, and then the tail plug is screwed into the threaded hole at the bottom of the lower valve body.

[0018] Further, the elastic diaphragm assembly reset spring is installed in the installation groove in the middle of the upper part of the lower valve body, and the top outer thread of the lower part of the height valve is in contact with the axis of the bottom inner thread of the upper part of the height valve, so that the other end of the elastic diaphragm assembly reset spring is sleeved on the head positioning boss of the elastic diaphragm assembly diaphragm holder in the upper part of the height valve, and then the top outer thread of the lower part of the height valve is screwed into the bottom inner thread of the upper part of the height valve for locking and fixing the elastic diaphragm assembly in the upper part of the height valve.

[0019] Further, the exhaust port of the upper valve body is communicated with the atmosphere, and the gas outlet of the lower valve body is connected with the air spring, and the gas inlet is connected with the air source.

[0020] The height valve has the advantages that:

[0021] In view of the above-mentioned defects of the existing height valve, the height valve is provided.The structure of the height valve is improved, key components for gas blocking are improved, and an elastic element capable of being slightly compressed is added, so that the function of the height valve not only includes the inflation state, the exhaust state and the balance state without inflation and exhaust, but also includes the balance state without inflation and exhaust when the air spring vibration isolation platform fluctuates within a certain range, and the air spring vibration isolation platform can also be quickly restored to be stable when the air spring vibration isolation platform fluctuates beyond the certain range. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic view of the height valve;

[0023] Figure 2 It is a 3-view of the appearance of the height valve;

[0024] Figure 3 It is a whole structural schematic view of the height valve.

[0025] In the drawing: 1. valve core reset spring, 2. guide column, 3. upper valve body, 4. valve head, 5. lower valve body, 6. diaphragm reinforcing plate, 7. elastic diaphragm, 8. diaphragm holder, 9. gas sealing elastic plug, 10. valve core sealing ring, 11. valve core, 12. installation and fixing large nut, 13. tail plug, 14. tail plug sealing ring, 15. pressure rod, 16. elastic stop plate, 17. pin shaft, 18. upper valve body and valve rod assembly fixing small round nut, 20. adjusting short screw, 21. adjusting long screw, 22. spring washer, 23. locking nut, 24. pressure rod head, 26. elastic diaphragm assembly reset spring. DETAILED DESCRIPTION

[0026] The height valve will be further described below with reference to the drawings.

[0027] Embodiment 1:

[0028] According to Figure 1 and 2 , the utility model discloses a height valve, including valve core reset spring 1, guide column 2, upper valve body 3, valve head 4, lower valve body 5, diaphragm reinforcing piece 6, elastic diaphragm 7, diaphragm holder 8, gas sealing elastic plug 9, valve core sealing ring 10, valve core 11, install fixed big nut 12, tail plug 13, tail plug sealing ring 14, pressure rod 15, elastic baffle 16, pin shaft 17, upper valve body and valve rod assembly fixed small round nut 18, adjust short screw 21, adjust long screw 21, spring washer 22, locking nut 23, pressure rod pressure head 24, elastic diaphragm assembly reset spring 26.

[0029] According to Figure 1 and 3 , the elastic diaphragm assembly includes diaphragm reinforcing piece 6, elastic diaphragm 7, diaphragm holder 8, the straight mouth of the tail of diaphragm holder 8 passes through the round hole in the middle of diaphragm reinforcing piece 6 and elastic diaphragm 7, ensures that the concave surface of diaphragm reinforcing piece 6 faces upwards, elastic diaphragm 7 is clamped in the middle of diaphragm reinforcing piece 6 and diaphragm holder 8, and is extruded to form riveting by special tools with the straight mouth of the tail of diaphragm holder 8, so that the three are connected to become a whole.

[0030] According to Figure 1 and 3 , gas sealing elastic plug 9 is installed in the mounting hole of the head of diaphragm holder 8, and gas sealing elastic plug 9 is in interference fit with the mounting hole of the head of diaphragm holder 8, so that gas sealing elastic plug 9 is firmly embedded therein.

[0031] According to Figure 1 and 3 , the valve core assembly includes valve core 11 and valve core sealing ring 10, the cylindrical shoulder top surface of valve core 11 is provided with valve core 11 installation groove, valve core sealing ring 10 is embedded in valve core 11 installation groove through special tools, and the installation groove straight mouth of valve core 11 is extruded and formed into fastening by special tools, so that valve core sealing ring 10 is embedded therein and does not fall off.

[0032] According to Figure 1 and 3 , the front end and the rear end of pressure rod 15 are provided with adjusting threaded holes, and the tail portion has pin shaft 17 connecting holes.Adjusting short screw 20 installs locking nut 23 and spring washer 22 and is screwed into the rear end adjusting threaded hole of pressure rod 15 again.Adjusting long screw 21 is screwed into the front end adjusting threaded hole of pressure rod 15, and then locking nut 23 and spring washer 22 are installed, and the top end of adjusting long screw 21 is screwed into the installation pressure rod pressure head 24, and the pressure rod assembly is formed.The pressure rod assembly is connected with valve head 4 through pin shaft 17, the two ends of pin shaft 17 have grooves, and elastic baffle 16 is installed at the two ends, and at this time, the pressure rod assembly and valve head 4 form an independent valve rod assembly.

[0033] According to Figure 1The upper valve body 3 of the upper valve body group is provided with an exhaust port. The valve stem assembly is installed in the corresponding installation position of the upper part of the upper valve body 3, and then the small circular nut 18 is screwed into the thread installed on the top of the upper valve body 3 for locking and fixing.

[0034] According to Figure 1 and 3 , the upper part of the height valve is assembled. First, the guide column 2 is inserted into the middle through hole in the upper valve body 3 of the upper valve body group, and then the elastic diaphragm assembly with the gas sealing elastic plug 9 installed is installed in the inner installation groove of the lower part of the upper valve body 3 of the upper valve body group. At this time, the upper part of the height valve is assembled.

[0035] According to Figure 1 and 3 , the lower part of the height valve is assembled. First, the valve core assembly is inserted into the middle through hole in the lower valve body 5, and then the valve core return spring 1 is sleeved into the valve core assembly tail in the lower valve body 5. The tail plug sealing ring 14 is sleeved into the blind hole in the tail plug 13 and the valve core return spring 1 and the tail of the valve core assembly, and then it is screwed into the threaded hole at the bottom of the lower valve body 5. At this time, the lower part of the height valve is assembled.

[0036] According to Figure 1 and 3 , the upper and lower parts of the height valve are assembled. The elastic diaphragm assembly return spring 26 is installed in the installation groove in the middle of the upper part of the lower valve body of the height valve, and the outer thread at the top of the lower part of the height valve is aligned with the inner thread at the bottom of the upper part of the height valve. The axis is contacted and matched to ensure that the other end of the elastic diaphragm assembly return spring 26 is sleeved into the elastic diaphragm assembly diaphragm holder 6 head positioning boss installed in the upper part of the height valve. Then, the outer thread at the top of the lower part of the height valve is screwed into the inner thread at the bottom of the upper part of the height valve for locking and fixing, and the elastic diaphragm assembly in the upper part of the height valve is fixed together.

[0037] Example two:

[0038] The contact relationship and function of each part of the assembled height valve are as follows:

[0039] The tail of the pressure rod 15 is connected to the upper end of the valve head 5 by a pin 17, and the front end of the pressure rod assembly is in contact with the pressure rod head 24 installed by the front end adjusting long screw 21 and the rear end adjusting short screw 20, which are used to adjust and set the floating height of the air spring isolation platform after inflation; the tail of the rear end adjusting short screw 20 is in contact with the top end surface of the guide column 2; the guide column 2 is axially slidable in the installation hole in the upper valve body 3; the tail of the guide column 2 is in contact with the concave surface of the diaphragm reinforcing plate 6; the convex surface of the diaphragm reinforcing plate 6 is in contact with the elastic diaphragm 7; the elastic diaphragm 7 is clamped between the diaphragm reinforcing plate 6 and the diaphragm holder 8; the air sealing elastic plug 9 is embedded in the installation hole in the diaphragm holder 8; one end of the elastic diaphragm assembly return spring 26 is installed on the head 8 of the diaphragm holder, and the other end is in the intermediate installation slot of the upper part of the lower valve body 5, and the elastic diaphragm assembly return spring 26 provides elastic compensation for the elastic diaphragm 7, so that the elasticity is enhanced and the response is more sensitive; the internal tapered surface of the air sealing elastic plug 9 is in contact with the head of the valve core 11; the valve core 11 passes through the middle circular hole of the lower valve body 5; the valve core sealing ring 10 is embedded in the valve core 11 and in contact with the end surface of the internal installation hole of the lower valve body 5; the valve core return spring 1 is sleeved on the tail of the valve core 11, and the tail plug sealing ring 14 is sleeved in the root installation slot of the tail plug 13, and then the assembled tail plug is sleeved into the valve core return spring 1 and the valve core 11, and screwed into the bottom threaded hole of the lower valve body 5, so that the tail plug 14 sealing ring is pressed and installed in the bottom surface installation slot of the lower valve body 5 to form a seal, and the valve core 11 is axially slidable in the middle circular hole of the lower valve body 5 and the installation hole of the tail plug 13, and the valve core return spring 1 provides a return force for the valve core 11.

[0040] According to Figure 1 and Figure 3 , the lower part of the lower valve body 5 is provided with an air inlet and an air outlet, the air inlet is connected with the external air source to provide compressed gas, and the air outlet is connected with the air spring to control the charging and discharging of the compressed gas inside; the lower part of the upper valve body 3 is provided with an exhaust port, which is in communication with the external atmosphere; when the compressed gas inside the air spring is discharged through the air outlet, the valve core 11 is disconnected from the elastic diaphragm assembly and the air sealing elastic plug 9 at this time, the valve core sealing ring 10 and the valve core 11 are in a sealed state to block the entry of compressed gas from the air inlet of the external air source, the discharged gas is discharged through the through hole between the diaphragm holder 8 and the air sealing elastic plug 9 and the guide column vent, and then discharged to the external atmosphere through the exhaust port; the elastic diaphragm assembly, the upper valve body 3 and the lower valve body 5 form a seal, and are in communication with the air sealing elastic plug 9, the valve core sealing ring 10 and the valve core 11, and the air outlet of the air spring to form a pressure cavity; the elastic diaphragm assembly, the air sealing elastic plug 9 and the valve core 11 form a seal; the lower valve body 5, the valve core sealing ring 10 and the valve core 11 form a seal.

[0041] Example Three:

[0042] When the air spring isolation platform is working, the following cases are included:

[0043] (1)When the air spring isolation platform is inflated, the rear end of the adjusting screw 20 of the pressure rod assembly, the pressure rod pressure head 24 is in the state of depression; the guide column 2 depresses the elastic diaphragm assembly, the air sealing elastic plug 9 and the valve core 11 are in the sealed state; the valve core sealing ring 10 and the lower valve body 5 are in the state of disengagement; at this time, the external compressed gas enters the air spring from the air outlet through the lower valve body 5 to inflate it; after the air spring is inflated to the preset height of the front end of the adjusting screw 21 and the rear end of the adjusting screw 20 of the pressure rod assembly and balanced, the rear end of the adjusting screw 20 of the pressure rod assembly and the pressure rod pressure head 24 are no longer in the state of depression; the guide column 2 no longer depresses the elastic diaphragm assembly, the valve core sealing ring 10 and the lower valve body 5 restore the closed state, and the states of the remaining parts remain unchanged.

[0044] (2)When the air spring isolation platform is in balance after being inflated, the air sealing elastic plug 9 and the valve core 11 are in the sealed state; the valve core sealing ring 10 and the lower valve body 5 are in the sealed state; the elastic diaphragm assembly, the upper valve body 3 and the lower valve body 5 form a seal, and are in communication with the air sealing elastic plug 9, the valve core sealing ring 10 and the valve core 11, the air outlet and the air spring to form a pressure cavity, plus the elastic diaphragm assembly, the air sealing elastic plug 9 and the valve core sealing ring 10 are high-elasticity components, which will produce a small amount of elastic compression deformation, and then through the guide column 2 and the lever fulcrum principle of the pressure rod assembly, the air spring isolation platform will not be broken after being inflated and balanced, and the vertical disturbance or dynamic load movement within 3mm will not break its balance state, and the anti-interference ability is far superior to other high valves on the market.

[0045] (3) When the air spring vibration isolation platform is inflated and balanced, if there is an external disturbance or dynamic load movement of more than 3mm vertically, the rear end adjustment short screw 20 and the pressure rod pressure head 24 of the pressure rod assembly are in the state of being pressed down, the guide column 2 presses the elastic diaphragm assembly, the air sealing elastic plug 9 and the valve core 11 are in the sealed state, the valve core sealing ring 10 and the lower valve body 5 are separated or the air sealing elastic plug 9 and the valve core 11 are separated, and the compressed gas of the air source enters the air spring from the air inlet and is quickly discharged from the air outlet. Or the rear end adjustment short screw 20 and the pressure rod pressure head 24 of the pressure rod assembly are in the state of being lifted up, the elastic diaphragm assembly exerts a force on the guide column 2 upward, at this time the valve core 11 is separated from the elastic diaphragm assembly and the air sealing elastic plug 9, the valve core sealing ring 10 and the valve core 11 are in the sealed state to prevent the compressed gas from the air inlet from entering, when the compressed gas in the air spring is quickly discharged from the air outlet, the discharged gas is discharged through the through hole in the middle of the diaphragm holder 8 and the air sealing elastic plug 9 and the guide column air outlet, and then is discharged to the outside atmosphere from the air outlet. During the process of breaking the balance and restoring the balance of the air spring vibration isolation platform, the platform cannot be restored immediately, but can be restored after several charging and discharging adjustments, that is, the air sealing elastic plug 9 and the valve core 11 are in the sealed state, and the valve core sealing ring 10 and the lower valve body 5 are in the sealed state. During the process, the elastic diaphragm assembly, the upper valve body 3 and the lower valve body 5 form a seal, and are connected with the air sealing elastic plug 9, the valve core sealing ring 10 and the valve core 11, the air outlet and the air spring to form a pressure cavity, as long as the pressure cavity is formed, the air spring vibration isolation platform can be quickly restored to the preset height of the front end adjustment long screw 21 and the rear end adjustment short screw 20 of the pressure rod assembly.

[0046] (4) When the air spring vibration isolation platform is discharged, at this time the air inlet is directly communicated with the outside environment, the rear end adjustment short screw 20 and the pressure rod pressure head 24 of the pressure rod assembly are in the state of being pressed down, the guide column 2 presses the elastic diaphragm assembly, the air sealing elastic plug 9 and the valve core 11 are in the sealed state, the valve core 10 sealing ring and the lower valve body 5 are in the separated state, the compressed gas in the air spring is discharged from the air outlet through the lower valve body 5 and the air outlet, and after the compressed gas in the air spring is completely discharged, the states of the parts remain unchanged, being ready for the next inflation.

[0047] Finally, it should be pointed out that the various embodiments in the specification are described and analyzed under different working conditions, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0048] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A height valve characterized by: The height valve upper group and lower group are fastened by threads, and the elastic diaphragm assembly reset spring (26) is installed between the two groups. The height valve upper group includes a pressure rod assembly, an upper valve body (3), a guide column (2), an elastic diaphragm assembly, and a gas sealing elastic plug (9). The pressure rod assembly includes a valve head (4), a pressure rod (15), and an elastic stopper (16). The pressure rod (15) is connected with the valve head (4) through a pin shaft (17) and is fixed through the elastic stopper (16). The upper valve body (3) is provided with an exhaust port at the lower part. The upper valve body (3) is fixed with the pressure rod assembly through a small round nut (18) and the top of the upper valve body (3) is threadedly locked. The guide column (2), the elastic diaphragm assembly, and the gas sealing elastic plug (9) are sequentially installed in the upper valve body. The top of the guide column is in contact with the pressure rod (15). The height valve lower group includes a lower valve body (5), an elastic diaphragm assembly reset spring (26), a valve core assembly, a valve core reset spring (1), and a tail plug (13). The valve core assembly and the valve core reset spring (1) are sequentially installed in the lower valve body (5). The lower part of the lower valve body (5) is provided with an air inlet and an air outlet. The tail plug (13) is provided with a tail plug sealing ring (14) at the root. The tail plug (13) is screwed into the lower valve body (5).

2. A high level valve according to claim 1, characterised in that: The elastic diaphragm assembly includes a diaphragm reinforcing sheet (6), an elastic diaphragm (7), and a diaphragm holder (8). The tail straight port of the diaphragm holder (8) penetrates the circular hole between the diaphragm reinforcing sheet (6) and the elastic diaphragm (7), ensuring that the concave surface of the diaphragm reinforcing sheet (6) faces upward. The elastic diaphragm (7) is clamped between the diaphragm reinforcing sheet (6) and the diaphragm holder (8) and is riveted through the straight port at the tail of the diaphragm holder (8) using a special tool.

3. A high level valve according to claim 2, characterised in that: The gas sealing elastic plug (9) is installed in the mounting hole at the head of the diaphragm holder (8). The gas sealing elastic plug (9) is in interference fit with the mounting hole at the head of the diaphragm holder (8) and is embedded therein.

4. A high level valve according to claim 3, characterised in that: The guide column (2) penetrates the middle through hole inside the upper valve body (3) and then the elastic diaphragm assembly with the gas sealing elastic plug (9) installed is installed in the inner installation groove at the lower part of the upper valve body (3).

5. A high level valve according to claim 1, characterised in that: The valve core assembly includes a valve core (11). The cylindrical shoulder top surface of the valve core (11) is provided with a valve core (11) installation groove. The valve core sealing ring (10) is embedded in the installation groove.

6. A high level valve according to claim 2, characterised in that: The straight port of the installation groove of the valve core (11) is extruded and formed into a fastener using a special tool.

7. A high level valve according to claim 1, characterised in that: The pressure rod assembly is installed in the corresponding installation position at the upper part of the upper valve body (3). The front end and the rear end of the pressure rod (15) are provided with adjustment threaded holes. The tail part is provided with a pin shaft (17) connection hole. The adjustment short screw (20) is installed with a lock nut (23) and a spring washer (22) and then screwed into the rear end adjustment threaded hole of the pressure rod (15). The adjustment long screw (21) is screwed into the front end adjustment threaded hole of the pressure rod. Then, the lock nut (23) and the spring washer (22) are installed. The top end of the adjustment long screw (21) is screwed into the installation pressure rod (24). The two ends of the pin shaft (17) connecting the pressure rod (15) and the valve head (4) have grooves, and the elastic stopper (16) is installed at the two ends.

8. A high level valve according to claim 1, characterised in that: The valve core assembly is installed in the middle through hole inside the lower valve body (5), and then the valve core reset spring (1) is sleeved into the tail of the valve core assembly installed in the lower valve body (5); the tail sealing ring (14) is sleeved in the tail plug (13) root installation groove, the blind hole in the tail plug (13) is sleeved into the valve core reset spring (1) and the tail of the valve core assembly, and then it is screwed into the lower valve body (5) bottom screw hole.

9. A high level valve according to claim 1 or 2, characterised in that: The elastic diaphragm assembly reset spring (26) is installed in the middle installation groove of the lower valve body (5), the axis of the top outer thread of the height valve lower part group and the bottom inner thread of the height valve upper part group is aligned, and the contact fit is carried out, so that the other end of the elastic diaphragm assembly reset spring (26) is sleeved into the elastic diaphragm assembly diaphragm holder (8) head positioning boss installed in the height valve upper part group, then the top outer thread of the height valve lower part group is screwed into the bottom inner thread of the height valve upper part group for locking, and the elastic diaphragm assembly in the height valve upper part group is fixed together.

10. A high level valve according to claim 1, characterised in that: The exhaust port of the upper valve body (3) is communicated with the outside atmosphere; the gas outlet of the lower valve body (5) is connected with the air spring, and the air inlet is connected with the outside air source.

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