CN220540379U

CN220540379U - Hydraulic control valve

Info

Publication number: CN220540379U
Application number: CN202320851731.1U
Authority: CN
Inventors: 陈海峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2024-02-27
Anticipated expiration: 2033-04-14

Abstract

The utility model provides a hydraulic control valve, including the valve body, be provided with inlet air inlet, valve pocket, air inlet, gas vent and pressure release mouth on the valve body, the valve pocket communicates inlet air inlet, gas vent respectively, is provided with the anti-siphon valve on the air inlet, is provided with the discharge valve on the gas vent, is provided with the relief valve on the pressure release mouth, is provided with the filter screen in the valve pocket and the movable sleeve that the activity set up from top to bottom, is provided with first regulation portion on the filter screen, is provided with the second regulation portion on the movable sleeve, realizes the inlet, the exhaust or the pressure release action of hydraulic control valve through the cooperation of first regulation portion and second regulation portion when the activity from top to bottom. The anti-siphon valve, the exhaust valve and the pressure release valve are arranged on the hydraulic control valve, the first adjusting part is arranged on the filter screen, the second adjusting part is arranged on the movable sleeve, and the air inlet, the air exhaust or the pressure release action of the hydraulic control valve is realized through the cooperation of the first adjusting part and the second adjusting part when the movable sleeve moves up and down, so that a single valve body has three different functions, and the hydraulic control valve is low in installation requirement and low in cost.

Description

Hydraulic control valve

Technical Field

The utility model relates in particular to a pilot operated valve.

Background

The devices for heating water (such as a water heater, a water dispenser and the like) are generally provided with a pressure relief valve, such as a safety valve disclosed in the Chinese patent document No. CN217003255U in 2022, 7 and 19, so as to prevent the water pressure in a water tank of the device from being too high; some water heating devices are also provided with an exhaust valve and an anti-siphon valve, the exhaust valve can prevent the air pressure in the water tank of the device from being too high, the anti-siphon valve can prevent the water tank of the device from being flattened by negative pressure, but the device is provided with three valves, the installation requirement is high, the installation time is long, the cost is high, and the device needs to reserve three installation positions, so that the occupied space of the device is large.

Therefore, further improvements are needed.

Disclosure of Invention

The utility model aims to provide a hydraulic control valve which is simple in structure, convenient to install, small in occupied space, low in cost, numerous in functions and strong in practicability, so as to overcome the defects in the prior art.

According to the design of this purpose a hydraulically controlled valve, including the valve body, its characterized in that: the valve body is provided with a water inlet air inlet, a valve cavity, an air inlet, an air outlet and a pressure relief opening, the valve cavity is respectively communicated with the water inlet air inlet, the air inlet and the air outlet, the air inlet is provided with an anti-siphon valve, the air outlet is provided with an exhaust valve, the pressure relief opening is provided with a pressure relief valve, a filter screen and a movable sleeve which is arranged in an up-and-down movable mode are arranged in the valve cavity, a first adjusting part is arranged on the filter screen, a second adjusting part is arranged on the movable sleeve, and air inlet, air exhaust or pressure relief action of the hydraulic control valve is realized through cooperation of the first adjusting part and the second adjusting part when the movable sleeve moves up-and-down.

The first adjusting part is a first adjusting hole, the second adjusting part is a second adjusting hole, and the water inlet and the air inlet are communicated with the valve cavity through the first adjusting hole and the second adjusting hole in sequence; when the water storage container is under negative pressure, the movable sleeve moves downwards, the first regulating hole and the second regulating hole are arranged vertically in a staggered mode, air inlet action is achieved, when the air pressure or the water pressure of the water storage container is increased, the movable sleeve moves upwards under the action of the air pressure or the water pressure, the first regulating hole faces the second regulating hole, and air exhaust or pressure relief action of the hydraulic control valve is achieved.

The top of the movable sleeve is provided with an exhaust through hole, and the valve cavity is communicated with the exhaust port through the exhaust through hole after the movable sleeve moves upwards.

The anti-siphon valve comprises a valve cover, an air inlet valve core, a first elastic element and an air inlet valve sleeve, wherein the valve cover is arranged on the air inlet, the air inlet valve sleeve is arranged in the valve cover, the first elastic element is arranged on the air inlet valve core, one end of the first elastic element is elastically acted on the air inlet valve core, the other end of the first elastic element is elastically acted on the air inlet valve sleeve, and the air inlet valve core is elastically and movably arranged in the air inlet valve sleeve through the first elastic element.

The air inlet valve sleeve is provided with an air inlet cavity and an air inlet hole which are mutually communicated, the air inlet is communicated with the air inlet cavity through the air inlet hole, the valve cover is provided with a through hole which is communicated with the outside, the air inlet valve core is elastically and movably arranged in the air inlet cavity so as to open or close the air inlet cavity, when the air inlet cavity is opened, the through hole is communicated with the air inlet cavity, and when the air inlet cavity is closed, the through hole is not communicated with the air inlet cavity.

The exhaust valve comprises a floater, a swing rod, a second elastic member, an exhaust nozzle, a valve core assembly and a top cover, wherein the floater is arranged on the exhaust port in a floating mode, one end of the swing rod is connected with the floater in a rotating mode, the other end of the swing rod is elastically connected with one end of the second elastic member, the other end of the second elastic member is elastically connected with the exhaust nozzle, the exhaust nozzle is sleeved on the valve core assembly, the valve core assembly is fixed on the top cover, the exhaust nozzle is communicated with the outside through the valve core assembly, the top cover is covered and installed at the top of the valve body, an exhaust cavity is arranged in the top cover, the swing rod, the second elastic member and the exhaust nozzle are located in the exhaust cavity, and the exhaust port is communicated with the exhaust cavity.

The valve core assembly comprises a valve core and an air sealing cap, wherein one side of the top cover is provided with a mounting hole, the valve core is inserted into the exhaust cavity after passing through the mounting hole, one end of the valve core arranged in the exhaust cavity is sleeved with an exhaust nozzle, and the other end of the valve core arranged outside the top cover is connected with the air sealing cap.

An exhaust vent is arranged on the exhaust nozzle, an exhaust channel is arranged on the valve core, an air outlet is arranged on the air sealing cap, the exhaust vent is communicated with the outside through the exhaust channel and the air outlet in sequence, one end of the swing rod is driven to swing downwards when the floater floats downwards, the other end of the swing rod is separated from the exhaust nozzle, so that the exhaust vent is opened, and the exhaust cavity is communicated with the exhaust vent to realize exhaust; when the float floats upwards, one end of the swing rod is driven to swing upwards so as to keep the swing rod horizontal with the exhaust nozzle and the valve core, and the other end of the swing rod is contacted with the exhaust nozzle so as to prevent the exhaust cavity from communicating with the exhaust vent.

The pressure release valve comprises a pressure release pull rod, a third elastic piece, a pressure regulating wall nut, a connector and an insert, wherein the connector is arranged on a pressure release opening, the pressure regulating wall nut is arranged on the connector, the third elastic piece is sleeved on the pressure release pull rod, one end of the third elastic piece is elastically acted on the pressure release pull rod, the other end of the third elastic piece is elastically acted on the pressure regulating wall nut, the insert is arranged in the pressure release opening, a movable cavity is formed between the connector and the pressure release opening, and the pressure release pull rod is elastically and movably arranged in the movable cavity through the third elastic piece.

The pressure relief opening is provided with a water outlet which is communicated with the inside of the pressure relief opening, the pressure relief pull rod is arranged in the movable cavity through elastic movement so as to open or close the pressure relief opening, when the pressure relief opening is opened, the valve cavity is communicated with the pressure relief opening, and when the pressure relief opening is closed, the pressure relief opening is not communicated with the valve cavity.

The anti-siphon valve, the exhaust valve and the pressure relief valve are arranged on the hydraulic control valve, the anti-siphon valve can prevent the water tank from being sucked and flattened, the exhaust valve can prevent the water tank from being excessively high in air pressure, the pressure relief valve can prevent the water tank from being excessively high in water pressure, the first adjusting part is arranged on the filter screen, the second adjusting part is arranged on the movable sleeve, the air inlet, the air exhaust or the pressure relief action of the hydraulic control valve is realized through the cooperation of the first adjusting part and the second adjusting part when the movable sleeve moves up and down, a single valve body has three different functions, 3 valve bodies are not required to be arranged on equipment, the installation requirement is low, the installation time consumption is short, the cost is low, the equipment does not need to reserve three installation positions, and the occupied equipment space is small.

Drawings

FIG. 1 is a cross-sectional view of a pilot operated valve in accordance with one embodiment of the present utility model.

FIG. 2 is an exploded cross-sectional view of a pilot operated valve in an embodiment of the utility model.

FIG. 3 is a cross-sectional view of a portion of a hydraulic control valve according to an embodiment of the present utility model.

Fig. 4 is a sectional view showing an assembled structure of an intake valve core, a first elastic member and an intake valve housing according to an embodiment of the present utility model.

FIG. 5 is a cross-sectional view of a valve cover in accordance with one embodiment of the present utility model.

FIG. 6 is a cross-sectional view of a top cover in an embodiment of the utility model.

FIG. 7 is a cross-sectional view of a movable sleeve according to an embodiment of the present utility model.

Fig. 8 is a cross-sectional view of a filter according to an embodiment of the utility model.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

Referring to fig. 1-8, the hydraulic control valve comprises a valve body 1, wherein a water inlet air inlet 1.1, a valve cavity 1.2, an air inlet 1.3, an air outlet 1.4 and a pressure relief opening 1.5 are arranged on the valve body 1, the valve cavity 1.2 is respectively communicated with the water inlet air inlet 1.1, the air inlet 1.3 and the air outlet 1.4, an anti-siphon valve a is arranged on the air inlet 1.3, an exhaust valve b is arranged on the air outlet 1.4, a pressure relief valve c is arranged on the pressure relief opening 1.5, a filter screen 19 and a movable sleeve 20 which is arranged in a vertically movable manner are arranged in the valve cavity 1.2, a first regulating part is arranged on the filter screen 19, a second regulating part is arranged on the movable sleeve 20, and air inlet, air exhaust or pressure relief action of the hydraulic control valve is realized through the cooperation of the first regulating part and the second regulating part when the movable sleeve 20 moves vertically; the hydraulic control valve is arranged on a water tank of water heater or water dispenser.

The first adjusting part is a first adjusting hole 19.1, the second adjusting part is a second adjusting hole 20.1, the water inlet and air inlet 1.1 is communicated with the valve cavity 1.2 through the first adjusting hole 19.1 and the second adjusting hole 20.1 in sequence, and the water inlet and air inlet 1.1 is communicated with the inside of the water tank; when the water storage container (i.e. the water tank) is under negative pressure, the movable sleeve 20 moves downwards due to gravity, the first regulating hole 19.1 and the second regulating hole 20.1 are arranged vertically in a staggered mode, air inlet action is achieved, external air can enter the valve cavity 1.2 through the anti-siphon valve a at the moment, then the air sequentially enters the water tank through the second regulating hole 20.1, the first regulating hole 19.1 and the water inlet 1.1, negative pressure born by the water tank is counteracted, when the air pressure or the water pressure of the water storage container (i.e. the water tank) rises, the movable sleeve 20 moves upwards against gravity under the action of the air pressure or the water pressure, the first regulating hole 19.1 is opposite to the second regulating hole 20.1, air exhaust or pressure relief action of the hydraulic control valve is achieved, the first regulating hole 19.1 is opposite to the second regulating hole 20.1, the flow of air or water can be increased, the redundant air or water of the water tank can be quickly discharged to the exhaust port 1.4 or the pressure relief port 1.5, and then the water tank is discharged to the outside through the exhaust valve b or the pressure relief valve c, so that the effect of quickly exhausting or quickly discharging water is achieved, the air pressure or the water pressure of the water tank is prevented from being too high, the water tank is not required to be quickly charged when the water tank is in negative pressure, the first regulating hole 19.1 and the second regulating hole 20.1 can be arranged in a vertically staggered mode, the water tank is in a normal state (namely, the air pressure and the water pressure are normal), the movable sleeve 20 can be arranged at the bottom of the valve cavity 1.2 due to gravity, the water tank can be arranged at the bottom of the valve cavity 1.2 due to gravity when the water tank is in negative pressure (see fig. 1), and the movable sleeve 20 can move upwards to reach the top of the valve cavity 1.2 when the air pressure or the water pressure is increased (see fig. 8).

The top of the movable sleeve 20 is provided with an exhaust through hole 20.2, after the movable sleeve 20 moves upwards, the valve cavity 1.2 is communicated with the exhaust port 1.4 through the exhaust through hole 20.2, and air in the valve cavity 1.2 can be exhausted into the exhaust port 1.4 through the exhaust through hole 20.2, so that exhaust is realized.

The anti-siphon valve a comprises a valve cover 2, an air inlet valve core 3, a first elastic element 4 and an air inlet valve sleeve 5, wherein the valve cover 2 is arranged on an air inlet 1.3, the air inlet valve sleeve 5 is arranged in the valve cover 2, the first elastic element 4 is arranged on the air inlet valve core 3, one end of the first elastic element 4 elastically acts on the air inlet valve core 3, the other end elastically acts on the air inlet valve sleeve 5, the air inlet valve core 3 is elastically movably arranged in the air inlet valve sleeve 5 through the first elastic element 4, and the first elastic element 4 is a spring.

The air inlet valve sleeve 5 is provided with an air inlet cavity 5.1 and an air inlet hole 5.2 which are mutually communicated, the air inlet 1.3 is communicated with the air inlet cavity 5.1 through the air inlet hole 5.2, the valve cover 2 is provided with a through hole 2.1 communicated with the outside, the air inlet valve core 3 is elastically and movably arranged in the air inlet cavity 5.1 so as to open or close the air inlet cavity 5.1, when the air inlet cavity 5.1 is opened, the through hole 2.1 is communicated with the air inlet cavity 5.1, and when the air inlet cavity 5.1 is closed, the through hole 2.1 is not communicated with the air inlet cavity 5.1; when the water tank is in negative pressure, external air pressure can promote the valve core 3 of intaking and remove to right to open air inlet cavity 5.1, external air gets into in valve pocket 1.2 through hole 2.1, air inlet cavity 5.1, inlet port 5.2 and air inlet 1.3 in proper order, then get into the water tank inside, offset the negative pressure that the water tank received, reach the purpose that the balanced water tank received, play effectual guard action to the water tank, prevent that the water tank from inhaling flat, and guaranteed user's life safety, when the water tank resumes atmospheric pressure normal, first elastic component 4 promotes valve core 3 of intaking and removes the reset to the left, in order to close air inlet cavity 5.1, can not intake this moment.

The exhaust valve b comprises a floater 6, a swinging rod 7, a second elastic piece 8, an exhaust nozzle 9, a valve core assembly and a top cover 10, wherein the floater 6 is arranged on the exhaust port 1.4 in a floating mode, one end of the swinging rod 7 is rotationally connected with the floater 6, the other end of the swinging rod is elastically connected with one end of the second elastic piece 8, the other end of the second elastic piece 8 is elastically connected with the exhaust nozzle 9, the exhaust nozzle 9 is sleeved on the valve core assembly, the valve core assembly is fixed on the top cover 10, the exhaust nozzle 9 is communicated with the outside through the valve core assembly, the top cover 10 is installed at the top of the valve body 1 in a covering mode through a pressing sleeve 24, an exhaust cavity 10.1 is arranged in the top cover 10, the swinging rod 7, the second elastic piece 8 and the exhaust nozzle 9 are located in the exhaust cavity 10.1, the exhaust port 1.4 is communicated with the exhaust cavity 10.1, and the second elastic piece 8 is a spring.

The valve core assembly comprises a valve core 11 and an air sealing cap 12, wherein one side of a top cover 10 is provided with a mounting hole 10.2, the valve core 11 is inserted into an exhaust cavity 10.1 after passing through the mounting hole 10.2, the valve core 11 is connected to the mounting hole 10.2 through threads in a threaded mode, one end of the valve core 11 arranged in the exhaust cavity 10.1 is sleeved with an exhaust nozzle 9, and the other end of the valve core 11 arranged outside the top cover 10 is connected with the air sealing cap 12.

The exhaust nozzle 9 is provided with an exhaust port 9.1, the valve core 11 is provided with an exhaust channel 11.1, the air sealing cap 12 is provided with an air outlet 12.1, the exhaust port 9.1 is sequentially communicated with the outside through the exhaust channel 11.1 and the air outlet 12.1, when the air pressure of the water tank is increased, the liquid level of the air outlet 1.4 is lowered, the float 6 is floated downwards and one end of the swing rod 7 is driven to swing downwards, the other end of the swing rod 7 is separated from the exhaust nozzle 9, so that the exhaust port 9.1 is opened, the exhaust cavity 10.1 is communicated with the exhaust port 9.1, and then air is sequentially discharged to the outside through the air outlet 1.4, the exhaust cavity 10.1, the exhaust port 9.1, the exhaust channel 11.1 and the air outlet 12.1, so that the explosion caused by overlarge pressure in the water tank is prevented; when the air pressure of the water tank is normal, the water in the air outlet 1.4 can enable the floater 6 to float upwards and drive one end of the swing rod 7 to swing upwards, so that the swing rod 7 is kept horizontal with the air outlet 9 and the valve core 11, the other end of the swing rod 7 is contacted with the air outlet 9 and seals the air outlet 9.1, so that the air outlet cavity 10.1 is not communicated with the air outlet 9.1, at the moment, the air outlet valve b cannot exhaust, and water leakage of the air outlet valve can be prevented.

A hollow cavity 6.1 which is opened downwards is arranged in the floater 6, a counterweight ring 22 is arranged at the bottom of the floater 6, a supporting frame 23 is arranged at the bottom of the exhaust port 1.4, and the supporting frame 23 limits the downward moving distance of the floater 6.

The pressure release valve c comprises a pressure release pull rod 13, a third elastic piece 14, a pressure regulating wall nut 15, a connector 16 and an insert 17, wherein the connector 16 is arranged on a pressure release opening 1.5, the pressure regulating wall nut 15 is arranged on the connector 16, the third elastic piece 14 is sleeved on the pressure release pull rod 13, one end of the third elastic piece 14 elastically acts on the pressure release pull rod 13, the other end elastically acts on the pressure regulating wall nut 15, the insert 17 is arranged in the pressure release opening 1.5, a movable cavity 21 is formed between the connector 16 and the pressure release opening 1.5, the pressure release pull rod 13 is elastically and movably arranged in the movable cavity 21 through the third elastic piece 14, and the third elastic piece 14 is a spring.

The water discharge port 1.6 is arranged on the pressure relief port 1.5, the water discharge port 1.6 is communicated with the inside of the pressure relief port 1.5, the pressure relief pull rod 13 is arranged in the movable cavity 21 through elastic movement to open or close the pressure relief port 1.5, when the water pressure of the water tank rises, the water pressure can push the pressure relief pull rod 13 to move rightwards, the pressure relief pull rod 13 is separated from the insert 17, the pressure relief port 1.5 is opened, the valve cavity 1.2 is communicated with the pressure relief port 1.5, water in the valve cavity 1.2 sequentially passes through the pressure relief port 1.5 and the water discharge port 1.6 to be discharged out of the hydraulic control valve, burst caused by overlarge pressure in the water tank is prevented, when the water pressure of the water tank is normal, the third elastic piece 14 pushes the pressure relief pull rod 13 to move leftwards, the pressure relief pull rod 13 is contacted with the insert 17, the pressure relief port 1.5 is closed, the pressure relief port 1.5 is not communicated with the valve cavity 1.2, and at the moment, the pressure relief valve c cannot be discharged.

One end of the pressure release pull rod 13 is sleeved with a bowl-shaped rubber pad 25, the other end of the pressure release pull rod 13 is sleeved with a collet 26, the collet 26 is arranged between the pressure release pull rod 13 and the connector 16, one end of the connector 16 is arranged on the pressure release opening 1.5, and the periphery of the other end of the connector 16 is sleeved with a handle sleeve 18.

The periphery of the water inlet and air inlet 1.1 of the valve body 1 is provided with a loose joint nut 27, a clamping ring 28 is arranged between the loose joint nut 27 and the valve body 1, a square clamping ring 29 is arranged on the water inlet and air inlet 1.1, the filter screen 19 is fixed in the valve body 1 through the square clamping ring 29, a rubber ring 30 is further arranged between the loose joint nut 27 and the valve body 1, and the rubber ring 30 is arranged at the bottom of the water inlet and air inlet 1.1.

The foregoing is a preferred embodiment of the utility model showing and describing the general principles, features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, which have been described in the foregoing description merely illustrates the principles of the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A pilot operated valve comprising a valve body (1), characterized in that: be provided with intake air inlet (1.1), valve pocket (1.2), air inlet (1.3), gas vent (1.4) and pressure release mouth (1.5) on valve body (1), valve pocket (1.2) communicate intake air inlet (1.1), air inlet (1.3), gas vent (1.4) respectively, be provided with on air inlet (1.3) and prevent siphon valve (a), be provided with discharge valve (b) on gas vent (1.4), be provided with relief valve (c) on pressure release mouth (1.5), be provided with filter screen (19) and movable sleeve (20) that the activity set up from top to bottom in valve pocket (1.2), be provided with first regulation portion on filter screen (19), be provided with second regulation portion on movable sleeve (20), realize the air inlet, exhaust or the pressure release action of liquid accuse valve through the cooperation of first regulation portion and second regulation portion when movable sleeve (20) are moved from top to bottom.

2. The pilot operated valve of claim 1, wherein: the first adjusting part is a first adjusting hole (19.1), the second adjusting part is a second adjusting hole (20.1), and the water inlet and air inlet (1.1) is communicated with the valve cavity (1.2) through the first adjusting hole (19.1) and the second adjusting hole (20.1) in sequence; when the water storage container is under negative pressure, the movable sleeve (20) moves downwards, the first regulating hole (19.1) and the second regulating hole (20.1) are arranged in a vertically staggered mode, air inlet action is achieved, when the air pressure or the water pressure of the water storage container is increased, the movable sleeve (20) moves upwards under the action of the air pressure or the water pressure, and the first regulating hole (19.1) is opposite to the second regulating hole (20.1), so that air exhaust or pressure relief action of the hydraulic control valve is achieved.

3. The pilot operated valve of claim 2, wherein: the top of the movable sleeve (20) is provided with an exhaust through hole (20.2), and after the movable sleeve (20) moves upwards, the valve cavity (1.2) is communicated with the exhaust port (1.4) through the exhaust through hole (20.2).

4. The pilot operated valve of claim 1, wherein: the anti-siphon valve (a) comprises a valve cover (2), an air inlet valve core (3), a first elastic piece (4) and an air inlet valve sleeve (5), wherein the valve cover (2) is arranged on an air inlet (1.3), the air inlet valve sleeve (5) is arranged in the valve cover (2), the first elastic piece (4) is arranged on the air inlet valve core (3), one end of the first elastic piece (4) is elastically acted on the air inlet valve core (3), the other end of the first elastic piece is elastically acted on the air inlet valve sleeve (5), and the air inlet valve core (3) is elastically movably arranged in the air inlet valve sleeve (5) through the first elastic piece (4).

5. The pilot operated valve of claim 4, wherein: an air inlet cavity (5.1) and an air inlet hole (5.2) which are mutually communicated are arranged on the air inlet valve sleeve (5), the air inlet (1.3) is communicated with the air inlet cavity (5.1) through the air inlet hole (5.2), an external through hole (2.1) is formed in the valve cover (2), the air inlet valve core (3) is elastically and movably arranged in the air inlet cavity (5.1) so as to open or close the air inlet cavity (5.1), when the air inlet cavity (5.1) is opened, the through hole (2.1) is communicated with the air inlet cavity (5.1), and when the air inlet cavity (5.1) is closed, the through hole (2.1) is not communicated with the air inlet cavity (5.1).

6. The pilot operated valve of claim 1, wherein: the exhaust valve (b) comprises a floater (6), a swinging rod (7), a second elastic element (8), an exhaust nozzle (9), a valve core assembly and a top cover (10), wherein the floater (6) is arranged on an exhaust cavity (1.4) in a floating mode, one end of the swinging rod (7) is rotationally connected with the floater (6), the other end of the swinging rod is elastically connected with one end of the second elastic element (8), the other end of the second elastic element (8) is elastically connected with the exhaust nozzle (9), the exhaust nozzle (9) is sleeved on the valve core assembly, the valve core assembly is fixed on the top cover (10), the exhaust nozzle (9) is communicated with the outside through the valve core assembly, the top cover (10) is installed at the top of the valve body (1) in a covering mode, an exhaust cavity (10.1) is arranged in the top cover (10), and the swinging rod (7), the second elastic element (8) and the exhaust nozzle (9) are located in the exhaust cavity (10.1), and the exhaust cavity (1.4) is communicated with the exhaust cavity (10.1).

7. The pilot operated valve of claim 6, wherein: the valve core assembly comprises a valve core (11) and an air sealing cap (12), wherein a mounting hole (10.2) is formed in one side of the top cover (10), the valve core (11) penetrates through the mounting hole (10.2) and then is inserted into the exhaust cavity (10.1), one end of the valve core (11) arranged in the exhaust cavity (10.1) is sleeved with the exhaust nozzle (9), and the other end of the valve core (11) arranged outside the top cover (10) is connected with the air sealing cap (12).

8. The pilot operated valve of claim 7, wherein: an exhaust port (9.1) is arranged on the exhaust nozzle (9), an exhaust channel (11.1) is arranged on the valve core (11), an air outlet (12.1) is arranged on the air sealing cap (12), the exhaust port (9.1) is communicated with the outside through the exhaust channel (11.1) and the air outlet (12.1) in sequence, one end of the swing rod (7) is driven to swing downwards when the floater (6) floats downwards, the other end of the swing rod (7) is separated from the exhaust nozzle (9), so that the exhaust port (9.1) is opened, and the exhaust cavity (10.1) is communicated with the exhaust port (9.1) to realize exhaust; when the floater (6) floats upwards, one end of the swing rod (7) is driven to swing upwards, so that the swing rod (7) is kept horizontal with the exhaust nozzle (9) and the valve core (11), and the other end of the swing rod (7) is contacted with the exhaust nozzle (9) so that the exhaust cavity (10.1) is not communicated with the exhaust through hole (9.1).

9. The pilot operated valve of claim 1, wherein: the pressure release valve (c) comprises a pressure release pull rod (13), a third elastic piece (14), a pressure regulating wall nut (15), a connector (16) and an insert (17), wherein the connector (16) is arranged on a pressure release opening (1.5), the pressure regulating wall nut (15) is arranged on the connector (16), the third elastic piece (14) is sleeved on the pressure release pull rod (13), one end of the third elastic piece (14) elastically acts on the pressure release pull rod (13), the other end elastically acts on the pressure regulating wall nut (15), the insert (17) is arranged in the pressure release opening (1.5), a movable cavity (21) is formed between the connector (16) and the pressure release opening (1.5), and the pressure release pull rod (13) is elastically movably arranged in the movable cavity (21) through the third elastic piece (14).

10. The pilot operated valve of claim 9, wherein: be provided with outlet (1.6) on pressure release mouth (1.5), outlet (1.6) intercommunication pressure release mouth (1.5) are inside, and pressure release pull rod (13) are through elastic activity setting in movable chamber (21) to open or seal pressure release mouth (1.5), when pressure release mouth (1.5) are opened, valve pocket (1.2) intercommunication pressure release mouth (1.5), and when pressure release mouth (1.5) were sealed, pressure release mouth (1.5) and valve pocket (1.2) were not linked together.