Dome valve with automatic air supply function

Abstract

The dome valve with the automatic air supplementing function comprises a dome valve body and an air supplementing assembly, an annular sealing air bag is arranged on the dome valve body, the air supplementing assembly comprises an air inlet pipe, an air supplementing bag, an air conveying pipe and an air supplementing pipe, one end of the air inlet pipe is connected with the air conveying pipe, and the other end of the air supplementing bag is connected with the air supplementing pipe. One end of the air supply bag is communicated with a one-way air inlet piece, the one-way air inlet piece is communicated with the air inlet pipe, the other end of the air supply bag is communicated with a communication box, one end of the air supply pipe is communicated with the communication box, and the other end of the air supply pipe is communicated with the sealing air bag. A connecting plate is horizontally arranged in the communicating box, a first communicating hole is formed in the connecting plate, and an opening and closing assembly used for controlling opening and closing of the first communicating hole is arranged on the communicating box. The dome valve has the effects that the sealing performance of the dome valve is maintained, and stable use of the dome valve in different states is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of valve body sealing, and in particular to a dome valve with an automatic air supply function. Background Art

[0002] The dome valve is a specially designed industrial valve primarily used in pneumatic conveying systems handling powdered, granular, or highly abrasive materials. Its core feature is a hemispherical or dome-shaped shutoff valve core, which effectively prevents material jamming and abrasion. It is suitable for use in industries such as chemical, power, metallurgy, and food.

[0003] Currently, the working principle of a dome valve is based on the combination of a flexible seal and a rigid dome. The dome valve includes a valve body and a valve core. The valve core is dome-shaped and is rotatably connected to the valve body shell via a rotating shaft. A connecting port is provided on the valve body shell, and an annular sealing ring is provided on the inner side of the valve body shell along the circumference of the connecting port. When the valve core rotates to a certain angle, the valve core and the annular sealing ring are pressed against each other, thereby sealing the connecting port. In order to improve the sealing performance of the dome valve and extend the service life of the sealing ring, an annular and hollow sealing ring is currently provided. The sealing ring is connected to an air source. In the blocking state, the air source vents into the sealing ring, causing the sealing ring to expand and stably contact the surface of the valve core, thereby improving the sealing performance of the valve body. In the connected state, the sealing ring is stopped from being inflated, which reduces the friction between the valve core and the sealing ring and helps to extend the service life of the device.

[0004] Regarding the above-mentioned related technologies, the inventor believes that during the use of the above-mentioned dome valve, the air source may occasionally be cut off, resulting in the sealing ring being unable to fit stably with the valve core during sealing, causing the sealing ring to be unable to stably seal the valve body, affecting the normal use of the dome valve. Summary of the Invention

[0005] In order to maintain the sealing performance of the dome valve and ensure the stable use of the dome valve in different states, the present application provides a dome valve with an automatic air replenishment function.

[0006] The present application provides a dome valve with automatic air supply function, which adopts the following technical solution: The cam is connected to the air intake pipe by a valve body, and the cam is connected to the air intake pipe by a valve body, and the cam is connected to the air intake pipe by a valve body.

[0007] By adopting the above technical solution, under normal conditions, the gas source is connected to the air inlet pipe, and the air-replenishing bag and the sealing airbag are inflated. At this time, the first connecting hole is in a blocked state under the action of the opening and closing component, preventing the gas in the air-replenishing bag from entering the sealing airbag, and the setting of the one-way air inlet component prevents the gas in the air-replenishing bag from overflowing. When the gas source is suddenly disconnected, the opening and closing component controls the opening of the first connecting hole, and the high-pressure gas in the air-replenishing bag is injected into the low-pressure sealing airbag through the air-replenishing pipe, thereby achieving timely air replenishment of the sealing airbag and improving the sealing performance of the dome valve in the event of gas cut-off. Through the mutual cooperation of the dome valve body, the opening and closing component, and the air-replenishing component, timely air replenishment of the sealing airbag is achieved in the state of gas source cut-off, which has the effect of maintaining the sealing performance of the dome valve and ensuring the stable use of the dome valve in different states.

[0008] Optionally, the opening and closing assembly includes a movable plate, a single-acting cylinder and a single-acting air pipe. The movable plate is slidably arranged in the connecting box and is fitted with the connecting plate. A second connecting hole is provided on the movable plate. The output shaft of the single-acting cylinder passes through the connecting box and is transmission-connected to the movable plate. One end of the single-acting air pipe is connected to the air intake pipe, and the other end is connected to the air supply cylinder. When there is an air source on the single-acting cylinder, the first connecting hole and the second connecting hole are staggered. When there is no air source on the single-acting cylinder, the first connecting hole and the second connecting hole are connected.

[0009] By adopting this technical solution, when the air source is functioning normally, the movable plate, under the action of the single-acting cylinder, moves to a position where the first and second connecting holes are offset, thereby sealing the air bag. When the air source is cut off, the output shaft of the single-acting cylinder, under the action of the elastic member within its cylinder body, resets, and the movable plate moves accordingly, aligning the first and second connecting holes and establishing connection. Gas in the air bag can now flow out through both the first and second connecting holes.

[0010] Optionally, a solenoid valve is provided between the gas supply pipe and the air inlet pipe, a barometer is provided on the gas supply pipe, and the barometer is electrically connected to the solenoid valve.

[0011] By adopting the above technical solution, the solenoid valve controls the opening of the gas pipe. When the value of the barometer reaches a predetermined value, the solenoid valve closes and stops injecting gas into the sealing airbag, thereby reducing the possibility of the sealing airbag bursting.

[0012] Optionally, the air supply component also includes an air supply tank, the air supply bag is arranged in the air supply tank, an exhaust pipe is connected to the air supply tank, the air supply bag is made of elastic material, and the air supply bag is arranged in the air supply tank along the length direction of the air supply tank.

[0013] By adopting the above technical solution, the air tank limits the expansion of the air bag, reducing the possibility of the air bag rupturing due to excessive expansion. The exhaust pipe connects the air inside and outside the air tank, allowing the air bag to be filled and deflated smoothly.

[0014] Optionally, a spare tank is further included, in which a spare bag is provided. The spare bag is made of elastic material. A first replenishing pipe is connected to the spare bag. The first replenishing pipe is connected to the air replenishing bag. A connecting component for controlling the opening and closing of the first replenishing pipe is provided between the spare tank and the air replenishing tank.

[0015] By adopting the above technical solution, the amount of gas in the air supply bag will decrease after multiple refills and normal gas leakage, necessitating refilling of the air supply bag when the gas source is disconnected. When the air supply bag is low on gas, the connecting component is activated, and the gas in the spare bag enters the air supply bag through the first refill pipe, thereby replenishing the air supply bag.

[0016] Optionally, an extrusion ring bag is provided in the air-inflating tank, and the extrusion ring bag is sleeved on the outside of the air-inflating bag, the inner ring wall of the extrusion ring bag is connected to the air-inflating bag, and the outer ring wall of the extrusion ring bag is connected to the inner ring wall of the air-inflating tank. The connecting component includes a mounting tube, a connecting tube, a sliding plate and a mounting tube. One end of the mounting tube is connected to the extrusion ring bag, and the other end extends out of the air-inflating tank and is connected to the bottom end of the connecting tube. The sliding plate is slidably provided in the connecting tube, the mounting tube is connected to the bottom end of the connecting tube, and the bottom end of the connecting tube is vertically slidably connected to a sliding rod, and the top of the sliding rod is provided with The cam is secured to the bottom of the tube and has a camming element which is adapted to engage said connecting rod and to engage said connecting rod, and a locking element which is adapted to engage said connecting rod and to engage said connecting rod.

[0017] By adopting the above technical solution, as the gas in the air-replenishing bag shrinks, the volume of the extrusion ring bag increases, and the gas in the connecting tube enters the extrusion ring bag through the installation tube. The sliding plate then descends until it contacts the extrusion block. The extrusion block and the slide rod descend, and the sealing block then descends and separates from the sealing ring. The inner cavity of the installation tube is now in a connected state. The gas in the standby bag enters the installation tube through the first replenishing tube, and the gas in the installation tube enters the air-replenishing bag through the second replenishing tube. As the gas is transported, the volume of the air-replenishing bag increases, and the volume of the extrusion ring bag decreases. Under the action of air pressure, the sliding plate moves up again and separates from the extrusion block. The sealing block arranged below the extrusion block re-seals the installation tube, thereby achieving the closure of the standby bag.

[0018] Optionally, a sliding rod is vertically connected to the sliding plate, the bottom end of the sliding rod is connected to an abutment plate, the top end of the sliding rod is connected to a limiting block, the abutment plate corresponds to the extrusion block in the vertical direction, and an elastic member is provided between the sliding plate and the abutment plate.

[0019] By adopting the above technical solution, as the spare bag replenishes air to the air replenishing bag, the sliding plate rises, and the abutment plate will not immediately separate from the extrusion block under the action of the elastic member, so that the air replenishing process can be carried out for a longer time and more gas can be replenished in the air replenishing bag.

[0020] Optionally, a group of one-way air inlet pieces are provided in communication between the backup bag and the air inlet pipe, and gas can flow from the air inlet pipe into the backup bag through the one-way air inlet pieces.

[0021] By adopting the above technical solution, the spare bag is connected to the air inlet pipe through the one-way air inlet component, and when it is first used, the air supply bag and the spare bag can be simultaneously filled with air through the air source.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the mutual cooperation of the dome valve body, the opening and closing assembly and the air supply assembly, the sealing airbag can be promptly replenished with air when the air source is cut off, which has the effect of maintaining the sealing performance of the dome valve and ensuring the stable use of the dome valve in different states; 2. The air tank limits the expansion of the air bag, reducing the possibility of the air bag rupturing due to excessive expansion. The exhaust pipe connects the air inside and outside the air tank, allowing the air bag to be filled and deflated smoothly; 3. The spare bag is connected to the air inlet pipe through a one-way air inlet piece. When it is first used, the air supply can be used to store air in the air replenishment bag and the spare bag at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of Example 1 of the present application, which is used to embody a dome valve with an automatic air replenishment function.

[0024] Figure 2 It is a partial cross-sectional view used to illustrate the internal structure of the gas supply tank in the embodiment of the present application.

[0025] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0026] Figure 4 This is a structural diagram of Example 2 of the present application, which is used to embody a dome valve with an automatic air replenishment function.

[0027] Figure 5 It is a partial cross-sectional view used to illustrate the internal structure of the air supply tank and the backup tank in the embodiment of the present application.

[0028] Figure 6 yes Figure 5 Enlarged view of part B in the middle.

[0029] Explanation of reference numerals: 1. air intake pipe; 2. air delivery pipe; 3. dome valve body; 31. air sealing bag; 4. air supply assembly; 41. air supply tank; 42. air supply bag; 43. connecting box; 44. connecting plate; 441. first connecting hole; 45. moving plate; 451. second connecting hole; 46. single-acting cylinder; 47. single-acting air pipe; 48. air supply pipe; 5. solenoid valve; 6. barometer; 7. exhaust pipe; 8. connecting pipe; 9. one-way air inlet; 10. spare tank; 11. connecting Components; 1101, mounting tube; 1102, connecting tube; 1103, sliding plate; 1104, sealing ring; 1105, abutment plate; 1106, sliding rod; 1107, limit block; 1108, abutment spring; 1109, mounting tube; 1110, sealing ring; 1111, extrusion block; 1112, sliding rod; 1113, mounting spring; 1114, sealing block; 1115, first replenishing tube; 1116, second replenishing tube; 12, spare bag; 13, extrusion ring bag. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-6 The present application is further described in detail. The embodiment of the present application provides a dome valve with an automatic air-supply function, which has the effect of maintaining the sealing performance of the dome valve and ensuring the stable use of the dome valve in different states.

[0031] Example 1 Reference Figure 1 A dome valve with automatic air replenishment function includes an air intake pipe 1, an air supply pipe 2, a dome valve body 3, and an air replenishment assembly 4. The dome valve body 3 is provided with a sealing airbag 31, which is arranged in an annular shape. One end of the air intake pipe 1 is connected to the air source, and the other end is connected to the solenoid valve 5. Two air supply pipes 2 are connected to the solenoid valve 5, and the end of the air supply pipe 2 away from the solenoid valve 5 is connected to the sealing airbag 31. One of the air supply pipes 2 is connected to a barometer 6, which is electrically connected to the solenoid valve 5.

[0032] Reference Figure 1-3 The air supply assembly 4 includes an air supply tank 41, an air supply bag 42, a connecting box 43, a connecting plate 44, a movable plate 45, a single-acting cylinder 46, a single-acting air pipe 47 and an air supply pipe 48. The air supply tank 41 is connected to an exhaust pipe 7, and the air supply bag 42 is arranged in the air supply tank 41. The air supply bag 42 is made of elastic rubber material. The air intake pipe 1 is connected to a connecting pipe 8, and the connecting pipe 8 is connected to a one-way air inlet member 9 (the one-way air inlet member 9 used in the embodiment of the present application is a one-way air intake valve). The one-way air inlet member 9 extends into the air supply tank 41 and is connected to one end of the air supply bag 42. Gas can enter the air supply bag 42 from the air intake pipe 1 through the one-way air inlet member 9 in a one-way manner.

[0033] Reference Figure 3The connecting box 43 is connected to the bottom end of the air supply tank 41 and is connected to the bottom end of the air supply bag 42. A connecting plate 44 is horizontally connected to the connecting box 43, dividing the connecting box 43 into upper and lower parts. The connecting plate 44 defines a first connecting hole 441. A movable plate 45 slidably fits against the bottom surface of the connecting plate 44 and defines a second connecting hole 451 corresponding to the first connecting hole 441. A single-acting cylinder 46 is disposed on one side of the exterior of the connecting box 43. An elastic member (not shown in the drawings) is provided inside the single-acting cylinder 46 to reset its output shaft.

[0034] Reference Figure 2 and Figure 3 The output shaft of the single-acting cylinder 46 horizontally passes through the connecting box 43 and is slidably connected thereto. The output shaft of the single-acting cylinder 46 is transmission-connected to the movable plate 45. The single-acting air pipe 47 is connected between the cylinder body of the single-acting cylinder 46 and the air intake pipe 1. When the air source is ventilated normally, the output shaft of the single-acting cylinder 46 extends, and the second connecting hole 451 on the movable plate 45 is staggered with the first connecting hole 441 on the connecting plate 44. When the air source is disconnected, the output shaft of the single-acting cylinder 46 retracts under the action of the elastic member, and the second connecting hole 451 on the movable plate 45 is connected to the first connecting hole 441 on the connecting plate 44. One end of the air supply pipe 48 is connected to the bottom end of the connecting box 43, and the other end is connected to the sealing airbag 31.

[0035] Reference Figure 1-3 Under normal airflow conditions, air is inflated into the sealed airbag 31 via the air intake pipe 1 and the two air delivery pipes 2. When the barometer 6 reaches a certain value, the solenoid valve 5 closes, halting further inflation of the sealed airbag 31 and preventing explosion of the sealed airbag 31 due to excessive air pressure. Air is then inflated into the airbag 42 via the air intake pipe 1 and the one-way air inlet assembly 9. The rigid air tank 41 limits the expansion of the airbag 42, reducing the possibility of explosion caused by continuous inflation. The exhaust pipe 7 connects the air inside and outside the air tank 41, ensuring smooth exhaust from the airbag 42. Since the air source is in a ventilated state, the second connecting hole 451 on the movable plate 45 is offset from the first connecting hole 441 on the connecting plate 44, preventing gas from entering the sealed airbag 31 through the air pipe 48. The one-way air inlet assembly prevents gas from overflowing from the airbag 42.

[0036] Reference Figure 2 and Figure 3When the gas source is cut off, the output shaft of the single-acting cylinder 46 is shortened and drives the movable plate 45 to move, the first communicating hole 441 is connected with the second communicating hole 451, and the gas in the air-inflating bag 42 flows from the high-pressure air-inflating bag 42 through the air-inflating pipe 48 into the sealing airbag 31 to inflate it, thereby achieving timely air replenishment of the sealing airbag 31 when the gas source is cut off, and ensuring the sealing performance of the dome valve.

[0037] The implementation principle of a dome valve with an automatic air replenishment function in Example 1 of the present application is as follows: when the air source is ventilated normally, the air source inflates the sealed airbag 31 and the air replenishment bag 42. The exhaust pipe 7 is provided to connect the air inside and outside the air replenishment tank 41, so that the exhaust process of the air replenishment bag 42 can proceed smoothly. The second connecting hole 451 on the movable plate 45 is staggered with the first connecting hole 441 on the connecting plate 44. When the air source is cut off, the first connecting hole 441 is connected with the second connecting hole 451, and the gas in the air replenishment bag 42 flows from the high-pressure air replenishment bag 42 through the air replenishment pipe 48 into the sealed airbag 31 to inflate it, thereby realizing timely air replenishment of the sealed airbag 31 when the air source is cut off.

[0038] Example 2 Reference Figure 4 and Figure 5 The difference between Example 2 and Example 1 is that it further includes a spare tank 10 and a connecting component 11. The spare tank 10 is arranged on one side of the air supply tank 41, and a spare bag 12 is arranged in the spare tank 10. Two connecting pipes 8 are connected on the air inlet pipe 1, and each connecting pipe 8 is connected with a one-way air inlet component 9, one of which extends into the spare tank 10 and is connected to the spare bag 12. The spare bag 12 is made of elastic rubber material. An extrusion ring bag 13 is provided in the air supply tank 41, and the extrusion ring bag 13 is sleeved on the outside of the air supply bag 42. The extrusion ring bag 13 is made of inelastic plastic film material. The inner ring wall of the extrusion ring bag 13 is connected to the air supply bag 42, and the outer ring wall of the extrusion ring bag 13 is connected to the outer ring wall of the air supply pipe 48.

[0039] Reference Figure 5 and Figure 6The connecting assembly 11 includes a mounting tube 1101, a connecting tube 1102, a sliding plate 1103, a sealing ring 1104, an abutting plate 1105, a sliding rod 1106, a limiting block 1107, an abutting spring 1108, a mounting tube 1109, a blocking ring 1110, an extrusion block 1111, a sliding rod 1112, a mounting spring 1113, a blocking block 1114, a first replenishing tube 1115, and a second replenishing tube 1116. The connecting tube 1102 is vertically arranged between the standby tank 10 and the air supply tank 41. One end of the mounting tube 1101 extends into the air supply tank 41 and is connected to the extrusion ring bag 13. The other end extends out of the air supply tank 41 and is connected to the bottom end of the connecting tube 1102. A vent is provided at the top of the connecting tube 1102.

[0040] Reference Figure 6 Sliding plate 1103 is horizontally disposed within connecting tube 1102, with the circumferential wall of sliding plate 1103 in close contact with the inner annular wall of connecting tube 1102. Sealing ring 1104 is sleeved around the edge of sliding plate 1103. Sliding rod 1106 penetrates sliding plate 1103 and is slidably connected thereto. A stopper 1107 is connected to the top of sliding rod 1106, and abutment plate 1105 is horizontally connected to the bottom of sliding rod 1106. Abutment spring 1108 is vertically disposed, with one end of abutment spring 1108 connected to the bottom surface of sliding plate 1103 and the other end connected to the top surface of abutment plate 1105.

[0041] Reference Figure 6 Mounting tube 1109 is connected to the bottom end of connecting tube 1102. Sliding rod 1112 vertically penetrates the bottom wall of connecting tube 1102 and is slidably connected thereto. The top end of sliding rod 1112 is connected to extrusion block 1111. The bottom end of sliding rod 1112 extends into mounting tube 1109 and is connected to blocking block 1114. Extrusion block 1111 and abutment plate 1105 are arranged vertically correspondingly. Mounting spring 1113 is sleeved on sliding rod 1112. One end of mounting spring 1113 is connected to the bottom end of connecting tube 1102 and the other end is connected to blocking block 1114. Blocking ring 1110 is connected to the inner ring wall of mounting tube 1109. In its natural state, blocking block 1114 is pressed against the bottom surface of blocking ring 1110 under the action of mounting spring 1113. Blocking block 1114 and blocking ring 1110 jointly separate mounting tube 1109 into two non-connected cavities, one above and one below. One end of the first replenishing tube 1115 is connected to the bottom of the backup bag 12, and the other end is connected to the installation tube 1109. The connection position of the first replenishing tube 1115 is located above the sealing ring 1110. One end of the second replenishing tube 1116 is connected to the bottom of the installation tube 1109, and the other end extends into the air replenishing tank 41 and is connected to the air replenishing bag 42.

[0042] Reference Figure 5 and Figure 6After the air bag 42 has been refilled multiple times and leaks during normal use, the amount of gas in the air bag 42 gradually decreases, causing the air pressure in the air bag 42 to drop to a level that prevents it from flowing smoothly into the sealed airbag 31 for refilling. At this point, the air bag 42 needs to be refilled when the air source is cut off. As the volume of the air bag 42 decreases, the volume of the extrusion ring bag 13 gradually expands, causing the sliding plate 1103 in the connecting tube 1102 to slide downward. When the abutment plate 1105 contacts the extrusion block 1111, the blocking block 1114 descends and separates from the blocking ring 1110. The gas in the standby bag 12 enters the installation tube 1109 through the first refilling pipe 1115, and the gas in the installation tube 1109 enters the air bag 42 through the second refilling pipe 1116 to refill it.

[0043] Reference Figure 5 and Figure 6 As the air-inflating bag 42 expands, the volume of the extrusion ring bag 13 decreases, and the sliding plate 1103 rises under the action of air pressure. The setting of the abutment spring 1108 prevents the abutment plate 1105 from immediately separating from the extrusion block 1111, which helps to prolong the air-inflating time of the air-inflating bag 42. When the abutment plate 1105 is completely separated from the extrusion block 1111, the installation cylinder 1109 is blocked again, and the air-inflating of the air-inflating bag 42 is stopped. The air-inflating bag 42 is connected to the air inlet pipe 1 through the one-way air inlet member 9. When the air source is ventilated normally, air can be simultaneously inflated into the standby bag 12 and the air-inflating bag 42 for air storage.

[0044] The implementation principle of a dome valve with automatic air replenishment function in Example 2 of the present application is as follows: after the air replenishment bag 42 is replenished with air multiple times and leaks during normal use, the amount of gas in the air replenishment bag 42 gradually decreases, and the volume of the extrusion ring bag 13 gradually expands, causing the sliding plate 1103 in the connecting tube 1102 to slide downward. When the abutment plate 1105 contacts the extrusion block 1111, the sealing block 1114 descends and separates from the sealing ring 1110, and the gas in the spare bag 12 enters the air replenishment bag 42 through the first replenishment pipe 1115 and the second replenishment pipe 1116 to replenish it.

[0045] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A dome valve with automatic air supply function, characterized by: The invention comprises a dome valve body (3) and an air supply assembly (4), wherein the dome valve body (3) is provided with an annular sealing airbag (31), and the air supply assembly (4) comprises an air intake pipe (1), an air supply bag (42), an air delivery pipe (2), and an air supply pipe (48), wherein one end of the air intake pipe (1) is connected to the air delivery pipe (2), and one end of the air delivery pipe (2) away from the air intake pipe (1) is connected to the sealing airbag (31), and one end of the air supply bag (42) is connected to a one-way air intake member (9), and the one-way air intake member (9) is connected to the air intake pipe (1). In a natural state, gas can flow from the air inlet pipe (1) into the air replenishing bag (42) through the one-way air inlet member (9); the other end of the air replenishing bag (42) is connected to a connecting box (43); one end of the air replenishing pipe (48) is connected to the connecting box (43), and the other end is connected to the sealing airbag (31); a connecting plate (44) is horizontally arranged in the connecting box (43); a first connecting hole (441) is opened on the connecting plate (44); and an opening and closing component for controlling the opening and closing of the first connecting hole (441) is provided on the connecting box (43).

2. The dome valve with automatic air supply function according to claim 1, characterized in that: The opening and closing assembly includes a movable plate (45), a single-acting cylinder (46) and a single-acting air pipe (47). The movable plate (45) is slidably arranged in the connecting box (43) and is fitted with the connecting plate (44). A second connecting hole (451) is provided on the movable plate (45). The output shaft of the single-acting cylinder (46) passes through the connecting box (43) and is transmission-connected to the movable plate (45). One end of the single-acting air pipe (47) is connected to the intake pipe (1), and the other end is connected to the air supply cylinder. When there is an air source on the single-acting cylinder (46), the first connecting hole (441) and the second connecting hole (451) are staggered. When there is no air source on the single-acting cylinder (46), the first connecting hole (441) and the second connecting hole (451) are connected.

3. The dome valve with automatic air supply function according to claim 2, characterized in that: A solenoid valve (5) is provided between the air delivery pipe (2) and the air inlet pipe (1), and a barometer (6) is provided on the air delivery pipe (2), and the barometer (6) is electrically connected to the solenoid valve (5).

4. The dome valve with automatic air supply function according to claim 3, characterized in that: The air-replenishing assembly (4) further comprises an air-replenishing tank (41), the air-replenishing bag (42) is arranged in the air-replenishing tank (41), an exhaust pipe (7) is connected to the air-replenishing tank (41), the air-replenishing bag (42) is made of elastic material, and the air-replenishing bag (42) is arranged in the air-replenishing tank (41) along the length direction of the air-replenishing tank (41).

5. The dome valve with automatic air supply function according to claim 4, characterized in that: The invention also includes a spare tank (10), wherein a spare bag (12) is provided in the spare tank (10), and the spare bag (12) is made of elastic material. A first replenishing pipe (1115) is provided on the spare bag (12), and the first replenishing pipe (1115) is connected to the air replenishing bag (42). A connecting component (11) for controlling the opening and closing of the first replenishing pipe (1115) is provided between the spare tank (10) and the air replenishing tank (41).

6. The dome valve with automatic air supply function according to claim 5, characterized in that: The air supply tank (41) is provided with an extrusion ring bag (13), the extrusion ring bag (13) is sleeved on the outside of the air supply bag (42), the inner ring wall of the extrusion ring bag (13) is connected to the air supply bag (42), the outer ring wall of the extrusion ring bag (13) is connected to the inner ring wall of the air supply tank (41), the connecting component (11) includes a mounting pipe (1101), a connecting cylinder (1102), a sliding plate (1103) and a mounting cylinder (1109), the mounting pipe ( One end of the connecting tube (1101) is connected to the extrusion ring bag (13), and the other end extends out of the air supply tank (41) and is connected to the bottom end of the connecting tube (1102). The sliding plate (1103) is slidably arranged in the connecting tube (1102), and the mounting tube (1109) is connected to the bottom end of the connecting tube (1102). The bottom end of the connecting tube (1102) is vertically slidably connected to a sliding rod (1112), and the top end of the sliding rod (1112) is provided with an extrusion ring. The bottom end of the sliding rod (1112) extends into the installation tube (1109) and is connected to a blocking block (1114). A blocking ring (1110) is connected to the inner ring wall of the installation tube (1109). An elastic member is provided between the extrusion block (1111) and the inner bottom wall of the connecting tube (1102). The top end of the blocking block (1114) is pressed against the blocking ring (1110) under the action of the elastic member and tightens the installation tube (1109). The inner cavity is divided into two parts, an upper part and an lower part. One end of the first replenishing tube (1115) is connected to the installation tube (1109). The connection position of the first replenishing tube (1115) is located above the sealing ring (1110). The bottom end of the installation tube (1109) is connected to the second replenishing tube (1116). The end of the second replenishing tube (1116) away from the installation tube (1109) extends into the air replenishing tank (41) and is connected to the air replenishing bag (42).

7. The dome valve with automatic air supply function according to claim 6, characterized in that: A sliding rod (1106) is vertically passed through the sliding plate (1103) and is slidably connected thereto. The bottom end of the sliding rod (1106) is connected to an abutment plate (1105). The top end of the sliding rod (1106) is connected to a limiting block (1107). The abutment plate (1105) corresponds to the extrusion block (1111) in the vertical direction. An elastic member is provided between the sliding plate (1103) and the abutment plate (1105).

8. The dome valve with automatic air supply function according to claim 5, characterized in that: A group of one-way air inlet components (9) are connected between the standby bag (12) and the air inlet pipe (1), and gas can flow from the air inlet pipe (1) into the standby bag (12) through the one-way air inlet components (9).

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