In-pipe air valve

Abstract

The invention relates to an in-pipe air valve. The air valve is suitable for the technical field. According to the technical scheme, the in-pipe air valve is characterized in that the in-pipe air valve comprises a valve body which is internally provided with a valve body cavity, the lower end of the valve body is provided with an air-water inlet and outlet, and the upper end of the valve body is provided with a first ventilation opening; the valve cover is fixed to the upper end of the valve body, a valve cover cavity is formed in the valve cover, a second ventilation opening is formed in the lower end of the valve cover, an air inlet and outlet opening is formed in the upper end of the valve cover, and the valve cover cavity is communicated with the valve body cavity through the second ventilation opening and the first ventilation opening; the floating ball valve is arranged in the valve body cavity and can seal the first air vent when the water level in the valve body cavity is larger than or equal to the preset water level; and the throttling mechanism is arranged in the valve cover cavity, and the throttling mechanism is used for increasing the exhaust resistance of the air inlet and the air outlet of the valve cover by reducing the exhaust area.

Description

Technical Field

[0001] The present invention relates to an in-pipe air valve, which is applicable to the technical field of air valves. Background Art

[0002] There is a float ball inside the air valve, which can isolate water and air, ensuring that while air can enter and exit the valve, water will not leak. Due to this characteristic, air valves are often used in long-distance water conveyance pipelines to supplement air when the pipeline is under low pressure, expel air after the pressure recovers, and at the same time prevent water leakage.

[0003] Currently, air valves are only applicable to the case where the external pressure is atmospheric pressure, that is, the air inlet and outlet of the air valve are directly connected to the atmosphere. However, for occasions where the external pressure is not atmospheric pressure, the air inlet and outlet of the air valve are not directly connected to the atmosphere but are connected to the pipeline of a gas storage device. Therefore, the current air valves cannot meet this requirement.

[0004] In addition, some water hammer protection devices have both a water storage tank and a high-pressure gas storage tank, and the connection and disconnection of the two tanks are controlled by an air valve. Generally speaking, to ensure the positive pressure protection ability of the device, it is often required that the air valve exhausts air as slowly as possible to form an air cushion inside the water storage tank, absorb the energy of the water hammer wave, and reduce the positive pressure amplitude. However, ordinary air valves cannot adjust the exhaust volume, resulting in difficulty in ensuring the positive pressure protection effect of the water hammer protection device. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: in view of the above problems, to provide an in-pipe air valve.

[0006] The technical solution adopted by the present invention is: an in-pipe air valve, characterized by comprising: A valve body, which has a valve body chamber inside, has a gas-water inlet and outlet at its lower end, and has a first ventilation port at its upper end; A valve cover, fixed to the upper end of the valve body, which has a valve cover chamber inside, has a second ventilation port at the lower end of the valve cover, has an air inlet and outlet at the upper end of the valve cover, and the valve cover chamber is connected to the valve body chamber through the second ventilation port and the first ventilation port; A float ball valve, arranged inside the valve body chamber, and capable of closing the first ventilation port when the water level in the valve body chamber is greater than or equal to a preset water level; A throttling mechanism, arranged inside the valve cover chamber, and this throttling mechanism is used to increase the exhaust resistance of the air inlet and outlet of the valve cover by reducing the exhaust area.

[0007] The float ball valve includes: A lower guide cylinder, whose upper end is open and connected to the first ventilation port, whose lower end is closed, and at least one gas-water inlet and outlet hole is provided on the side wall of the lower guide cylinder; A floating ball is arranged inside the first guiding cylinder. The diameter of the first floating ball is adapted to the inner diameter of the first guiding cylinder and is larger than the diameter of the first air vent.

[0008] A lower guiding rod is arranged below the floating ball. The upper end of the lower guiding rod is connected to the floating ball, and the lower end of the lower guiding rod passes through the guiding hole at the bottom of the lower guiding cylinder.

[0009] The floating ball valve is provided with a micro-exhaust mechanism, which can provide a micro-exhaust passage for the valve body chamber after the floating ball valve closes the first air vent.

[0010] The micro-exhaust mechanism includes: A spherical cover is arranged inside the floating ball valve, above the floating ball, and can close the first air vent under the upward buoyancy of the floating ball; An upper guiding rod, the lower end of which is connected to the upper end face of the spherical cover. The upper guiding rod is inserted into a guiding sleeve, and the guiding sleeve is fixed inside the valve cover chamber; A micro-exhaust hole communicating the upper and lower end faces is arranged at the central position of the spherical cover.

[0011] The throttling mechanism includes: An upper guiding cylinder, the lower end of which is open and communicates with the second air vent. A plurality of air inlet and outlet holes are arranged on its side wall and top; A guiding sleeve, the lower end of which is fixed on the upper guiding cylinder, and the upper end of which is close to the air inlet and outlet of the valve cover and is provided with a limiting device; A throttling body, which is a circular sheet structure, with a diameter smaller than the diameter of the air inlet and outlet of the valve cover and an inner diameter adapted to the guiding sleeve. The throttling body can be sleeved on the guiding sleeve and move up and down along the axis of the guiding sleeve; In the initial state, the throttling body is located inside the air inlet and outlet of the valve cover; A spring, the upper end of which is connected to the throttling body, and the lower end of which is connected to the upper guiding cylinder; In the initial state, the spring is in a compressed state under the gravity of the throttling body.

[0012] The throttling mechanism further includes: An active adjustment mechanism is arranged inside the valve cover chamber and is used to actively adjust the position of the throttling body on the guiding sleeve to achieve the adjustment of the exhaust area.

[0013] The active adjustment mechanism includes: A steel wire rope, one end of which is fixed to the throttling body, and the length of the steel wire rope is greater than the stroke of the throttling body; A rope winding rod is inserted into the side wall of the valve cover. One end inserted into the valve cover is fixedly connected to the steel wire rope, and the other end is connected to an electric actuator. It can drive the rope winding rod to rotate around its own axis in an electric manner, so as to realize the winding or unwinding of the steel wire rope, and further adjust the up and down position of the throttling body on the guiding sleeve.

[0014] A displacement sensor and a first medium sensor are provided in the valve cover chamber. The displacement sensor is located above the float valve and is used to collect the displacement information of the float ball in the float valve. The first medium sensor is used to collect the medium information in the valve cover chamber. A second medium sensor is provided in the valve body chamber, and this second medium sensor is used to collect the medium information in the valve body chamber.

[0015] A pressure sensor is provided in the valve body chamber.

[0016] The beneficial effects of the present invention are as follows: A throttling mechanism is provided in the valve cover chamber of the present invention. This throttling mechanism can greatly reduce the exhaust area to increase the exhaust resistance of the air inlet and outlet of the valve cover, playing a throttling role, which is beneficial to intercepting gas during the water hammer protection process to form an air cushion and protecting against positive water hammer.

[0017] In the present invention, the throttling mechanism includes a guide sleeve and a throttle body. The initial position of the throttle body is at the air inlet and outlet of the valve cover, blocking it in a large area. When the air valve intakes air, the gas moves downward, pressing the throttle body downward and away from the air inlet and outlet. Therefore, the throttle body does not have a throttling effect during air intake. When the air valve exhausts air, the throttle body re-enters the position of the air inlet and outlet under the action of the spring, increasing the exhaust resistance and playing a throttling role.

[0018] In the present invention, if the pipeline or water storage tank needs to be filled with water and a large amount of air needs to be exhausted, the electric actuator can be used to drive the rope winding rod to rotate. The steel wire rope is wound around the rope winding rod, and the throttle body moves downward, increasing the exhaust area and reducing the exhaust resistance to meet the need for a large amount of air exhaust. If the water filling speed is too fast, the rope winding rod can be rotated in the reverse direction. The throttle body is blown up by the force of the gas and approaches the air inlet and outlet, increasing the exhaust resistance and the back pressure of water filling, reducing the water filling speed and ensuring the safety of water filling.

[0019] The present invention judges the working state of the air valve by combining the float ball displacement information collected by the displacement sensor, the medium information collected by the first and second medium sensors, and the pressure information collected by the pressure sensor. By monitoring the state of the air valve, it can also be judged whether the water filling is completed, whether the pressure difference inside and outside the air valve is normal, etc., which is convenient for users to timely handle and maintain the problems that occur during the operation process.

[0020] In the present invention, flanges can be provided at both the gas-water inlet and outlet of the valve body and the air inlet and outlet of the valve cover. Both ends of the air valve can be connected to the pipeline, meeting the requirement of water-gas isolation when the external pressure is not the atmospheric pressure. Description of the Drawings

[0021] Figure 1 It is a structural schematic diagram of the embodiment.

[0022] Description of the reference numerals: 1 valve body; 2 valve cover; 3 lower guide cylinder; 4 floating ball; 5 lower guide rod; 6 upper guide cylinder; 7 spherical cover; 8 guide sleeve; 9 micro exhaust hole; 10 upper guide rod; 11 flow restrictor; 12 spring; 13 displacement sensor; 14 first medium sensor; 15 second medium sensor; 16 pressure sensor; 17 filter screen; 18 rope winding rod; 19 steel wire rope. Detailed implementation manners

[0023] For a better understanding of the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0024] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0025] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0026] It should be noted that the orientation terms such as "upper", "lower", "left" and "right" described in the embodiments of the present application are described from the angles shown in the accompanying drawings, and should not be construed as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0027] Embodiment 1: This embodiment is a pipe air valve, including a valve body 1, a valve cover 2, a floating ball valve and a throttling mechanism, etc.

[0028] In this embodiment, the valve body 1 has a valve body chamber inside, the lower end of the valve body 1 has an air-water inlet and outlet, and the upper end of the valve body 1 has a first ventilation port; the valve cover 2 has a valve cover chamber inside, the lower end of the valve cover 2 has a second ventilation port, and the upper end of the valve cover 2 has an air inlet and outlet.

[0029] In this example, the air-water inlet and outlet at the lower end of the valve body 1 can be connected to an external pipeline or tank through a flange, the upper end of the valve body 1 can be connected to the valve cover 2 through a flange, the valve body chamber in the valve body 1 communicates with the valve cover chamber in the valve cover 2 through the first ventilation port and the second ventilation port, and the air inlet and outlet at the upper end of the valve cover 2 can be connected to an external pipeline or tank through a flange.

[0030] In this example, a filter screen 17 is provided at the gas-water inlet and outlet at the lower end of the valve body 1 to intercept debris in the water, and the filter screen 17 is fixedly connected to the valve body 1.

[0031] In this embodiment, the float valve is arranged in the valve body chamber, and it can close the first vent hole at the upper end of the valve body 1 when the water level in the valve body chamber is greater than or equal to the preset water level.

[0032] In this example, the float valve includes a lower guide cylinder 3, a float 4, a lower guide rod 5, etc. The upper end of the lower guide cylinder 3 is open and communicates with the first vent hole of the valve body 1. The lower end of the lower guide cylinder 3 is closed. At least one gas-water inlet and outlet hole is provided on the side wall of the lower guide cylinder 3 as a channel for gas and water to enter and exit. The bottom of the lower guide cylinder 3 is not perforated to prevent the float 4 in the lower guide cylinder 3 from being blown up when a large amount of air enters the valve body 1, blocking the air valve.

[0033] In this embodiment, the float 4 is arranged in the first guide cylinder. The diameter of the first float is adapted to the inner diameter of the first guide cylinder and is larger than the diameter of the first vent hole. A lower guide rod 5 is provided below the float 4. The upper end of the lower guide rod 5 is connected to the float 4, and the lower end of the lower guide rod 5 passes through the guide hole at the bottom of the lower guide cylinder 3. The float 4 is restricted by the lower guide cylinder 3 and the lower guide rod 5 and can only move up and down along the axis of the lower guide cylinder 3.

[0034] In this example, the throttling mechanism is arranged in the valve cover chamber, and the throttling mechanism is used to increase the exhaust resistance of the air inlet and outlet of the valve cover 2 by reducing the exhaust area.

[0035] In this embodiment, the in-pipe air valve is applied to a water hammer protection device. The water hammer protection device has an in-pipe air valve, a high-pressure gas storage tank, and a water storage tank. The upper end of the in-pipe air valve is connected to the high-pressure gas storage tank, the lower end is connected to the water storage tank, and the bottom of the water storage tank is connected to the water conveyance pipeline.

[0036] The working principle of the water hammer protection device in this embodiment is as follows: When the water conveyance pipeline is used for the first time, it needs to be filled with water. When the water conveyance pipeline and the water storage tank are filled with water, the float 4 in the air valve floats up, the float valve acts, closes the first vent hole of the valve body 1, and then closes the air valve.

[0037] Under accident conditions such as when the water pump is powered off, a negative pressure appears in the water conveyance pipeline or the water storage tank. The gas moves downward, presses down the throttling structure, and increases the intake area. The water level in the air valve drops, the float 4 in the float valve drops, the float valve no longer closes the first vent hole, and a large amount of air enters the air valve to inhibit the separation of the water column.

[0038] When the water hammer wave returns, the pressure in the water conveyance pipeline rises, the air is discharged from the air valve, the throttling mechanism acts, the air inlet and outlet on the valve cover 2 are blocked in a large area, the exhaust resistance increases, the gas flow rate decreases, and most of the gas remains in the water storage tank to form an air cushion to hinder the rise of the pressure in the water conveyance pipeline.

[0039] Embodiment 2: The structure of this embodiment is basically the same as that of Embodiment 1, except that the throttling mechanism in this example includes an upper guide cylinder 6, a guide sleeve 8, a throttle body 11, a spring 12, an active adjustment mechanism, etc.

[0040] In this example, the upper guide cylinder 6 is located in the valve cover chamber, its lower end is open and communicates with the second air vent of the valve cover 2, and a plurality of air inlet and outlet holes are provided on its side wall and top.

[0041] In this embodiment, the guide sleeve 8 is arranged vertically, its lower end is fixed on the upper guide cylinder 6, and its upper end is close to the air inlet and outlet of the valve cover 2 and is provided with a limiting device.

[0042] In this example, the throttle body 11 is a circular sheet structure, the diameter is smaller than the diameter of the air inlet and outlet of the valve cover 2, the inner diameter is adapted to the guide sleeve 8 and is smaller than the diameter at the limiting device. In the initial state, the throttle body 11 is located in the air inlet and outlet of the valve cover 2.

[0043] In this embodiment, both the throttle body 11 and the spring 12 are sleeved on the guide sleeve 8. The upper end of the spring 12 is connected to the throttle body 11, and the lower end of the spring 12 is connected to the upper guide cylinder 6. The throttle body 11 can move up and down along the guide sleeve 8 on the guide sleeve 8. In the initial state, the spring 12 is in a compressed state under the gravity of the throttle body 11.

[0044] The spring constant of the spring 12 is The mass of the throttle body 11 is The force-bearing area during air intake is The opening pressure difference of the air valve is Then the original length of the spring 12 satisfies .

[0045] In this embodiment, an active adjustment mechanism is arranged in the valve cover chamber to actively adjust the position of the throttle body 11 on the guide sleeve 8 to achieve the adjustment of the exhaust area. The active adjustment mechanism includes a steel wire rope 19, a rope winding rod 18 and an electric actuator (including a motor). One end of the steel wire rope 19 is fixed on the throttle body 11, and the other end is fixed on the rope winding rod 18. The length of the steel wire rope 19 is greater than the stroke of the throttle body 11. The rope winding rod 18 is inserted into the side wall of the valve cover 2. One end inserted into the valve cover 2 is fixedly connected to the steel wire rope 19, and the other end is connected to the electric actuator, and the rope winding rod 18 can be driven to rotate around its own axis in an electric manner, so as to realize the winding or unwinding of the steel wire rope 19.

[0046] When the water conveyance pipeline is filled with water for the first time, the high-pressure gas storage tank is not inflated and remains connected to the atmosphere. The floating ball 4 in the air valve drops. The electric actuator drives the rope winding rod 18 to rotate, winds the steel wire rope 19 around the rope winding rod 18, the throttle body 11 moves downward, increasing the exhaust area, and the air valve exhausts a large amount of air. When the water filling speed is too fast, the rope winding rod 18 can be rotated in the reverse direction. The throttle body 11 is blown up under the action of the gas, approaches the air inlet and outlet, increases the exhaust resistance, and reduces the water filling speed. After the water filling is completed, the rope winding rod 18 is rotated in the reverse direction, the steel wire rope 19 is completely unwound, and the throttle body 11 returns to the initial position. At this time, the high-pressure gas storage tank starts to be inflated.

[0047] Under accident conditions such as power failure of the water pump, negative pressure appears in the water conveyance pipeline or the water storage tank. The water level in the air valve drops, the floating ball valve no longer closes the first ventilation port, the air valve intakes a large amount of air, and the separation of the water column is inhibited. The high-pressure gas from top to bottom presses the throttle body 11 downward, and the throttle body 11 moves away from the air inlet and outlet at the upper end of the valve cover 2. Under the action of the spring 12, the throttle body 11 also moves away from the second ventilation port at the lower end of the valve cover 2.

[0048] When the water hammer wave returns, the pressure in the water conveyance pipeline rises, the air is discharged from the air valve, the throttle body 11 returns to the initial position under the action of the spring 12, enters the air inlet and outlet, the exhaust resistance increases, the gas flow rate decreases, and most of the gas stays in the water storage tank to form an air cushion, hindering the rise of the pressure in the water conveyance pipeline.

[0049] Embodiment 3: This embodiment has basically the same structure as Embodiment 2, except that in this example, a micro-exhaust mechanism is provided in the floating ball valve, and this micro-exhaust mechanism can provide a micro-exhaust channel for the valve body chamber after the floating ball valve closes the first ventilation port.

[0050] In this example, the micro-exhaust mechanism includes a spherical cover 7 and an upper guide rod 10. The spherical cover 7 is arranged in the floating ball valve, above the floating ball 4 and below the first ventilation port of the valve body 1. The spherical cover can close the first ventilation port under the upward buoyancy of the floating ball 4; the lower end of the upper guide rod 10 is connected to the upper end surface of the spherical cover 7, and the upper guide rod is inserted into the guide sleeve 8. The guide sleeve is a guide rod with an axial channel formed inside, and the upper guide rod 10 is coaxially inserted into the axial channel of the guide sleeve 8.

[0051] In this embodiment, a micro-exhaust hole 9 communicating the upper and lower end surfaces is provided at the center position of the spherical cover 7 as the micro-exhaust channel.

[0052] When the floating ball 4 in the air valve floats up, causing the air valve to close, the trace gas dissolved in the water precipitates, and then gathers together to enter the area between the spherical cover 7 and the floating ball 4 through the gap between the spherical cover 7 and the lower floating ball 4, and is discharged to the valve cover chamber through the micro-exhaust hole 9 on the spherical cover 7 and then discharged through the air inlet and outlet of the valve cover 2.

[0053] Embodiment 4: The structure of this embodiment is basically the same as that of Embodiment 3, except that in this embodiment, a displacement sensor 13 is installed at the top of the upper guide cylinder 6 directly opposite to the spherical cover 7, a first medium sensor 14 is installed in the valve cover chamber; a second medium sensor 15 and a pressure sensor 16 are installed in the valve body chamber.

[0054] In this embodiment, the displacement sensor 13 can detect the displacement of the spherical cover 7, so as to judge the opening and closing state of the air valve. The displacement sensor 13, the first and second medium sensors and the pressure sensor 16 are respectively connected to the controller.

[0055] In this embodiment, the displacement sensor 13, the first and second medium sensors and the pressure sensor 16 are used to monitor the state of the air valve.

[0056] When the displacement sensor 13 detects that the spherical cover 7 has not reached the upper limit position, the air valve is in the open state. If the media detected by the first and second medium sensors are both air, the state of the air valve is normal; if the media detected by the first and second medium sensors are both water, it indicates that there is a serious water leakage phenomenon in the air valve.

[0057] When the displacement sensor 13 detects that the spherical cover 7 reaches the upper limit position, the air valve is in the closed state. If the media detected by the first and second medium sensors are air and water respectively, the state of the air valve is normal; if the media detected by the first and second medium sensors are both water, it indicates that there is a water leakage phenomenon in the air valve; if the media detected by the first and second medium sensors are both air, it indicates that the air valve closes in advance and there is still air in the valve body 1 that has not been exhausted.

[0058] In this embodiment, for the abnormal state of the air valve monitored by the cooperation of the displacement sensor 13, the first and second medium sensors and the pressure sensor 16, the controller will give an alarm to remind the user to repair or replace the air valve.

Claims

1. An in-pipe air valve, characterized in that: include: A valve body (1) having a valve body chamber inside, a gas and water inlet and outlet at the lower end, and a first vent at the upper end; A valve cover (2) is fixed to the upper end of the valve body (1), the valve cover has a valve cover chamber inside, the lower end of the valve cover (2) has a second vent, the upper end of the valve cover (2) has an air inlet and outlet, and the valve cover chamber is connected to the valve body chamber via the second vent and the first vent; A float valve, disposed in the valve body chamber, capable of closing the first vent when the water level in the valve body chamber is greater than or equal to a preset water level; A throttling mechanism is arranged in the valve cover chamber, and is used to increase the exhaust resistance of the air inlet and outlet of the valve cover (2) by reducing the exhaust area.

2. The in-pipe air valve according to claim 1, characterized in that: The float valve comprises: A lower guide cylinder (3), the upper end of which is open and communicates with the first vent, and the lower end of which is closed, and the side wall of the lower guide cylinder is provided with at least one air and water inlet and outlet hole; A float (4) is arranged in the first guide tube, and the diameter of the first float matches the inner diameter of the first guide tube and is larger than the diameter of the first vent.

3. The in-pipe air valve according to claim 2, characterized in that: A lower guide rod (5) is provided below the float (4), the upper end of the lower guide rod (5) is connected to the float (4), and the lower end of the lower guide rod (5) passes through a guide hole at the bottom of the lower guide cylinder (3).

4. The in-pipe air valve according to claim 2 or 3, characterized in that: The float valve is provided with a micro-exhaust mechanism, which can provide a micro-exhaust channel for the valve body chamber after the float valve closes the first vent.

5. The in-pipe air valve according to claim 4, characterized in that: The micro-exhaust mechanism comprises: A spherical cover (7) is arranged in the float valve, located above the float (4), and can close the first vent under the upward buoyancy of the float (4); An upper guide rod (10), the lower end of which is connected to the upper end surface of the spherical cover (7), the upper guide rod being inserted into a guide sleeve (8), and the guide sleeve being fixed in the valve cover chamber; A micro-air vent hole (9) communicating with the upper and lower end surfaces of the spherical cover (7) is provided at the center of the spherical cover (7).

6. The in-pipe air valve according to claim 1, characterized in that: The throttling mechanism comprises: An upper guide cylinder (6) having an opening at its lower end and communicating with the second vent, and having a plurality of air inlet and outlet holes formed on its side wall and top; A guide sleeve (8), the lower end of which is fixed to the upper guide cylinder (6), the upper end of which is close to the air inlet and outlet of the valve cover (2) and is provided with a limit device; The throttle body (11) is a circular sheet structure, with a diameter smaller than the diameter of the air inlet and outlet of the valve cover (2), and an inner diameter adapted to the guide sleeve (8). The throttle body can be moved up and down along the axis of the guide sleeve (8) and is sleeved on the guide sleeve (8); in an initial state, the throttle body (11) is located inside the air inlet and outlet of the valve cover (2); A spring (12), the upper end of which is connected to the throttle body (11), and the lower end of which is connected to the upper guide cylinder (6); in an initial state, the spring (12) is in a compressed state under the action of the gravity of the throttle body (11).

7. The in-pipe air valve according to claim 6, characterized in that: The throttling mechanism further comprises: An active adjustment mechanism is arranged in the valve cover chamber and is used to actively adjust the position of the throttling body (11) on the guide sleeve (8) to adjust the exhaust area.

8. The in-pipe air valve according to claim 7, characterized in that: The active adjustment mechanism comprises: A steel wire rope (19), one end of which is fixed to the throttling body (11), and the length of the steel wire rope (19) is greater than the stroke of the throttling body (11); A rope winding rod (18) is inserted into the side wall of the valve cover (2), one end of which is inserted into the valve cover (2) and is fixedly connected to the steel wire rope (19), and the other end is connected to the electric actuator. The rope winding rod (18) can be driven electrically to rotate around its own axis, thereby realizing winding or unwinding of the steel wire rope (19), thereby adjusting the upper and lower positions of the throttling body (11) on the guide sleeve (8).

9. The in-pipe air valve according to claim 1, characterized in that: A displacement sensor (13) and a first medium sensor (14) are provided in the valve cover chamber, wherein the displacement sensor (13) is located above the float valve and is used to collect displacement information of a float ball (4) in the float valve; and the first medium sensor (14) is used to collect medium information in the valve cover chamber; A second medium sensor (15) is provided in the valve body cavity, and is used to collect medium information in the valve body cavity.

10. The in-pipe air valve according to claim 1 or 9, characterized in that: A pressure sensor (16) is provided in the valve body cavity.

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