CN116084524A

CN116084524A - Pneumatic device, pneumatic control drain valve and water tank

Info

Publication number: CN116084524A
Application number: CN202310113579.1A
Authority: CN
Inventors: 谢炜; 蔡明建; 余角锋; 江移山
Original assignee: Arrow Home Group Co Ltd
Current assignee: Arrow Home Group Co Ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-05-09

Abstract

The invention discloses a pneumatic device, a pneumatic control drain valve and a water tank, wherein a shell of the pneumatic device is provided with a guide channel extending along a first direction, an air bag is arranged in the guide channel, the air bag is provided with a movable end, an air inlet piece and the air bag define an air cavity, a limiting piece is provided with a first limiting part and a second limiting part which are both arranged in the air cavity, a pressure release piece movably penetrates through the movable end, the pressure release piece is sequentially provided with a limiting section, a sealing section and a pressure release section in a sealing connection with the movable end, the pressure release section is communicated with the air cavity, the limiting section can be respectively abutted against the first limiting part and the second limiting part in a pressure release state, the pressure release section is communicated with the air cavity when the limiting section is abutted against the first limiting part, the pneumatic device is in a pressure release state, the sealing section is in a sealing connection with the movable end when the limiting section is abutted against the second limiting part, and the pneumatic device is in a sealing state. The technical scheme of the invention can automatically release pressure after the air bag is inflated.

Description

Pneumatic device, pneumatic control drain valve and water tank

Technical Field

The invention relates to the technical field of pneumatic devices, in particular to a pneumatic device, a pneumatic control drain valve and a water tank.

Background

Most of the traditional toilets use a mechanical drainage valve to drain water from a water tank, and when drainage is needed, the drainage valve is usually driven to be opened by a manual pressing mode or a lifting mode, so that drainage is realized. Along with the improvement of life quality requirements of people, the non-contact drain valve is gradually applied to the intelligent toilet. Due to the lack of a mechanical drive for manual pressing, the non-contact drain valve requires an additional pneumatic device to trigger the activation of the drain valve.

The pneumatic device commonly used in the market at present comprises an air pump, an air bag and a pressure release valve, when water is required to be discharged, the air pump is started to enable the air bag to be inflated, the air bag is inflated and stretched to drive the driven rod to trigger the water discharge valve, but because the existing pneumatic device in the market does not have the pressure release function, the air pump triggers the water discharge valve to open through the air bag to discharge water, the whole air channel is filled with pressure gas, if the air bag is not subjected to air release and pressure release, the air bag cannot be contracted, and the driven rod is always propped against the opening switch of the water discharge valve, so that water discharge cannot be stopped. In order to realize the pressure relief function of the pneumatic device, the existing pneumatic device is generally required to be provided with a special pressure relief module, an electromagnetic valve is additionally arranged, and the air bag is exhausted through air path conversion to realize pressure relief, but the scheme is required to be additionally provided with the electromagnetic valve, the pipeline, the circuit and other parts, so that the production cost of the pneumatic device is higher.

Disclosure of Invention

The invention mainly aims to provide a pneumatic device, which aims to automatically release pressure after an air bag is inflated, so that the manufacturing cost of the pneumatic device is low.

To achieve the above object, the present invention provides a pneumatic device comprising:

a housing provided with a guide passage extending in a first direction;

the air bag is arranged in the guide channel and is provided with a movable end;

the air inlet piece and the inner surface of the air bag jointly define an air cavity, and the air inlet piece is provided with an air inlet hole communicated with the air cavity;

the limiting piece is provided with a first limiting part and a second limiting part which are both arranged in the air cavity; and

the pressure release piece is movably arranged on the movable end in a penetrating manner and sequentially provided with a limiting section, a sealing section and a pressure release section, wherein the sealing section is used for being in sealing connection with the movable end, the pressure release section is used for being communicated with the air cavity, and the limiting section can be respectively abutted against the first limiting part and the second limiting part;

the pneumatic device is in the pressure release state, the pressure release section is communicated with the air cavity, when the limiting section is abutted to the first limiting part, the pneumatic device is in the pressure release state, in the sealing state, the sealing section is in sealing connection with the movable end, and when the limiting section is abutted to the second limiting part, the pneumatic device is in the sealing state.

Optionally, the limiting section is slidably disposed on the limiting member.

Optionally, the limiting section is provided with a sleeving hole extending along the first direction, and the limiting piece is slidably arranged in the sleeving hole in a penetrating mode.

Optionally, the socket hole has a socket interface, the inner periphery of socket is equipped with buckling part, first spacing portion locates in the socket hole, buckling part can support in first spacing portion.

Optionally, the second limiting part is arranged at the end part of the limiting part, which is close to the pressure release part, and the bottom of the sleeve joint hole can be abutted against the second limiting part.

Optionally, the second limiting part is arranged outside the sleeve joint hole, and in the first direction, the second limiting part and the limiting section are sequentially arranged.

Optionally, the pneumatic device further comprises a driven member slidably disposed on the guide channel, the driven member is connected with the movable end, and the hardness of the driven member is greater than that of the movable end.

Optionally, the driven member is configured as a driven cylinder, a cylinder opening of the driven cylinder faces the air bag, and the outer circumferential surface of the driven cylinder is in sliding fit with the guide channel.

The invention also provides a pneumatic drain valve, which comprises:

a drain valve body;

the pneumatic device is arranged on the drain valve main body; and

the lifting module is provided with a lifting part in transmission connection with the movable end of the pneumatic device, and the lifting part is arranged above the movable end.

The invention also proposes a water tank comprising:

a case; and

the pneumatic control drain valve is arranged on the box body.

In the technical scheme of the invention, the pneumatic device comprises a shell. The housing is provided with a guide channel extending along a first direction. The pneumatic device also comprises an air bag arranged in the guide channel, so that the shell provides guide for the air bag, so that the moving track of the air bag is more accurate, and the pneumatic control drain valve provided with the pneumatic device can trigger a switch every time. The air bag may extend in a first direction, and it will be appreciated that when inflated, the air bag may extend in a first direction and when deflated, the air bag may collapse in a second direction, the second direction being opposite the first direction. The air bag is provided with a movable end, when the pneumatic device is applied to the pneumatic control drain valve, the movable end of the air bag can be in transmission connection with the lifting module of the pneumatic control drain valve, specifically, when the air bag is inflated, the movable end of the air bag moves along a first direction, so that the lifting module is driven to move, and the pneumatic control drain valve is driven to be opened. The pneumatic device further includes an air intake. The air inlet piece and the inner surface of the air bag jointly define an air cavity, and the air inlet piece is provided with an air inlet hole communicated with the air cavity, so that air can enter the air cavity from the air inlet hole, and the air bag is inflated. It will be appreciated that when the pneumatic device is in use, the air intake of the pneumatic device is also in communication with an external air pump. It should be noted that the air chamber includes a space surrounded by the air bag and a space surrounded by the air inlet member. The pneumatic device further comprises a limiting piece. The limiting piece is provided with the first limiting part and the second limiting part which are arranged in the air cavity, so that the first limiting part and the second limiting part fully utilize the space in the air cavity, namely the first limiting part and the second limiting part do not occupy the space outside the air cavity, on one hand, the miniaturization of the pneumatic device is facilitated, and on the other hand, when the pneumatic control drain valve provided with the pneumatic device is in transmission with other parts, more movement space is provided for the other parts, and the interference between the pneumatic control drain valve and the other parts is avoided. It can be understood that the first limiting part can be arranged in the space surrounded by the air bag, can also be arranged in the space surrounded by the air inlet piece, and the second limiting part can be arranged in the space surrounded by the air bag, and can also be arranged in the space surrounded by the air inlet piece. The pneumatic device further includes a pressure relief member. The pressure release piece is movably arranged at the movable end in a penetrating manner, the pressure release piece is sequentially provided with a limiting section, a sealing section and a pressure release section in a sealing connection manner, wherein the sealing section is used for being communicated with the movable end, and the pressure release section is used for being communicated with the air cavity. The limiting section can be respectively abutted against the first limiting part and the second limiting part, and the limiting part can limit the stroke of the pressure release part. The pneumatic device is provided with a pressure relief state and a sealing state, in the pressure relief state, the pressure relief section is communicated with the air cavity, and when the limiting section is propped against the first limiting part, the pneumatic device is in the pressure relief state. Specifically, when inflating towards the air cavity, seal section and expansion end sealing connection, expansion end drive pressure release piece move towards first direction, and when the spacing section of pressure release piece supported in first spacing portion, the expansion end continued to move towards first direction to make seal section and expansion end take place relative movement, and then make pressure release section and air cavity intercommunication, so, the atmospheric pressure in the air cavity can follow pressure release section and discharge. In the sealing state, the sealing section is in sealing connection with the movable end, and when the limiting section abuts against the second limiting part, the pneumatic device is in the sealing state. Specifically, when the gas in the air cavity is discharged from the pressure release section, the pressure release section is communicated with the air cavity, the air bag contracts, the movable end drives the pressure release piece to move towards the second direction, and when the limiting section of the pressure release piece is propped against the second limiting part, the movable end continues to move towards the second direction, so that the pressure release section and the movable end relatively move, and further the sealing section is in sealing connection with the movable end. Therefore, the pneumatic device can automatically release pressure after the air bag is inflated, so that the manufacturing cost of the pneumatic device is lower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a pneumatic drain valve according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the two pneumatic devices in FIG. 1;

FIG. 3 is a cross-sectional view of the two pneumatic devices of FIG. 2;

FIG. 4 is a cross-sectional view of the bladder of FIG. 3;

FIG. 5 is a schematic view of the construction of the pressure relief device of FIG. 3;

FIG. 6 is a cross-sectional view of the pressure relief piece of FIG. 5;

FIG. 7 is a schematic view of an embodiment of the air intake and the spacing member of FIG. 3;

FIG. 8 is a schematic view of an embodiment of the air intake and the spacing member of FIG. 3;

fig. 9 is a schematic structural view of another embodiment of the air intake member and the stopper.

Reference numerals illustrate:

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the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship between the components, the movement condition, etc. in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in abutment, or in communication between two elements or in interaction with each other, unless explicitly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The pneumatic device commonly used in the market at present comprises an air pump, an air bag and a pressure release valve, when water is required to be discharged, the air pump is started to enable the air bag to be inflated, the air bag is inflated and stretched to drive the driven rod to trigger the water discharge valve, but because the existing pneumatic device in the market does not have the pressure release function, the air pump triggers the water discharge valve to open through the air bag to discharge water, the whole air channel is filled with pressure gas, if the air bag is not subjected to air release and pressure release, the air bag cannot be contracted, and the driven rod is always propped against the opening switch of the water discharge valve, so that water discharge cannot be stopped. In order to realize the pressure relief function of the pneumatic device, the existing pneumatic device is generally required to be provided with a special pressure relief module, an electromagnetic valve is additionally arranged, and the air bag is exhausted through air path conversion to realize pressure relief, but the scheme is required to be additionally provided with the electromagnetic valve, the pipeline, the circuit and other parts, so that the production cost of the pneumatic device is higher. Therefore, the invention provides a pneumatic device, which aims to automatically release pressure after an air bag is inflated, so that the manufacturing cost of the pneumatic device is lower.

Referring to fig. 2-9, in one embodiment of the present invention, the pneumatic device 100 includes a housing 700. The housing 700 is provided with a guide passage 710 extending in a first direction. The pneumatic device further includes an air bladder 200 disposed in the guide channel 710. In this way, the housing 700 provides guidance for the air bladder 200 to make the movement track of the air bladder 200 more accurate, so that the pneumatic drain valve 900 incorporating the pneumatic device 100 can be triggered to switch each time. The airbag 200 may extend in a first direction, and it is understood that when the airbag 200 is inflated, the airbag 200 may extend in the first direction, and when the airbag 200 is deflated, the airbag 200 may collapse in a second direction, opposite the first direction, wherein the first direction is shown as direction a in fig. 3, and the second direction is shown as direction B in fig. 3. The air bag 200 has a movable end 210, when the pneumatic device 100 is applied to the pneumatic drain valve 900, the movable end 210 of the air bag 200 may be in driving connection with the lifting module 920 of the pneumatic drain valve 900, specifically, when the air bag 200 is inflated, the movable end 210 of the air bag 200 moves along the first direction, so as to drive the lifting module 920 to move, and further drive the pneumatic drain valve 900 to open. The pneumatic device 100 also includes an air intake 300. The air inlet 300 and the inner surface of the air bag 200 together define an air chamber, and the air inlet 300 is provided with an air inlet 310 communicated with the air chamber, so that air can enter the air chamber from the air inlet 310, thereby realizing the inflation of the air bag 200. It will be appreciated that when the pneumatic device 100 is in use, the air intake 300 of the pneumatic device 100 is also in communication with an external air pump. It should be noted that the air chamber includes a space surrounded by the airbag 200 and a space surrounded by the air intake 300. The pneumatic device 100 also includes a stop 500. The limiting member 500 has the first limiting portion 510 and the second limiting portion 520 that all locate in the air cavity, so, the space in the air cavity has been fully utilized to first limiting portion 510 and second limiting portion 520, namely first limiting portion 510 and second limiting portion 520 do not occupy the space outside the air cavity, on the one hand be favorable to pneumatic means 100 miniaturization, on the other hand also provide more space of movement for other parts when being equipped with pneumatic means 100's pneumatic drain valve 900 and other parts transmission, avoid pneumatic drain valve 900 to interfere with other parts. It can be appreciated that the first limiting portion 510 may be disposed in a space surrounded by the air bag 200, or may be disposed in a space surrounded by the air intake member 300, and the second limiting portion 520 may be disposed in a space surrounded by the air bag 200, or may be disposed in a space surrounded by the air intake member 300. Pneumatic device 100 also includes a relief piece 600. The pressure release member 600 movably penetrates through the movable end 210, and the pressure release member 600 sequentially has a limiting section 610, a sealing section 620 for sealing connection with the movable end 210, and a pressure release section 630 for communicating with the air cavity in the first direction, it can be understood that when the air cavity is inflated, the sealing section 620 of the pressure release member 600 is sealing connected with the movable end 210 to avoid gas leakage in the air cavity, and when the air cavity is deflated, the pressure release section 630 of the pressure release member 600 is communicated with the air cavity to discharge the gas in the air cavity to the outside. The limiting section 610 may be abutted against the first limiting portion 510 and the second limiting portion 520, and the limiting member 500 may limit the stroke of the pressure release member 600. The pneumatic device 100 has a pressure relief state in which the pressure relief section 630 communicates with the air chamber and a sealing state in which the pneumatic device 100 is in the pressure relief state when the limit section 610 abuts against the first limit portion 510. Specifically, when the air cavity is inflated, the sealing section 620 is in sealing connection with the movable end 210, the movable end 210 drives the pressure relief piece 600 to move in the first direction, and when the limit section 610 of the pressure relief piece 600 abuts against the first limit portion 510, the movable end 210 continues to move in the first direction, so that the sealing section 620 and the movable end 210 move relatively, and the pressure relief section 630 is communicated with the air cavity, so that air pressure in the air cavity can be discharged from the pressure relief section 630. In the sealed state, the sealing section 620 is in sealing connection with the movable end 210, and when the limiting section 610 abuts against the second limiting portion 520, the pneumatic device 100 is in the sealed state. Specifically, when the gas in the air cavity is discharged from the pressure release section 630, the pressure release section 630 is communicated with the air cavity, the air bag 200 contracts, the movable end 210 drives the pressure release member 600 to move in the second direction, and when the limit section 610 of the pressure release member 600 abuts against the second limit portion 520, the movable end 210 continues to move in the second direction, so that the pressure release section 630 and the movable end 210 move relatively, and the seal section 620 is in sealing connection with the movable end 210. Thus, the pneumatic device 100 can automatically release pressure after the airbag 200 is inflated, so that the manufacturing cost of the pneumatic device 100 is low.

It will be appreciated that the bladder 200 is easily deformed, and that when the movable end 210 of the bladder 200 moves in the first direction, the bladder 200 may rock, thereby allowing the movable end 210 to rock, and thus allowing the pressure release member 600 to rock. Thus, the limiting section 610 of the pressure relief member 600 is difficult to accurately abut against the first limiting portion 510 and the second limiting portion 520, and therefore, in an embodiment, the limiting section 610 is slidably disposed on the limiting member 500. It can be appreciated that the limiting section 610 is attached to the limiting member 500, and the limiting section 610 is not easy to shake under the limitation of the limiting member 500, so that the limiting section 610 can be relatively accurately abutted against the first limiting portion 510 and the second limiting portion 520 respectively. However, the present design is not limited thereto, and in other embodiments, the pneumatic device 100 may further provide a guiding component to guide the pressure release member 600 in the first direction, so that the limiting section 610 of the pressure release member 600 can relatively precisely abut against the first limiting portion 510 and the second limiting portion 520 respectively.

It should be noted that, in an embodiment, the limiting member 500 is fixedly connected to the air inlet member 300, so that when the air inlet member 300 is assembled with the air bag 200, the limiting member 500 also enters the air cavity, which is beneficial to rapid assembly of the pneumatic device 100. The stopper 500 may be, but is not limited to, integrally formed with the air intake 300. However, the present design is not limited thereto, and in other embodiments, the air inlet 300 and the limiting member 500 are respectively connected with the air bag 200 in a sealing manner, and the limiting member 500 is disposed through the air bag 200.

There are many ways to match the air bag 200 with the air intake member 300, specifically, in one embodiment, the air intake member 300 has an outer peripheral surface surrounding the limiting member 500, the outer peripheral surface is provided with a limiting ring groove 320, the air bag 200 has a fixed end 220 opposite to the movable end 210, the fixed end 220 is provided with a mounting opening 221, and a periphery of the mounting opening 221 is clamped with the limiting ring groove 320. Of course, in other embodiments, the fixed end 220 may also be bonded to the outer peripheral surface of the limiting member 500.

There are many ways in which the limiting section 610 is slidably engaged with the limiting member 500, specifically, in an embodiment, the limiting section 610 is provided with a socket hole 611 extending along the first direction, and the limiting member 500 is slidably disposed through the socket hole 611. Of course, in other embodiments, a socket hole 611 extending along the second direction may be provided in the limiting member 500, and the limiting section 610 may be slidably disposed through the socket hole 611.

Optionally, in an embodiment, the socket hole 611 has a socket, the inner periphery of the socket is provided with a fastening portion 612, the first limiting portion 510 is disposed in the socket hole 611, and the fastening portion 612 may abut against the first limiting portion 510. Thus, when the air cavity is inflated, the sealing section 620 is in sealing connection with the movable end 210, the movable end 210 drives the pressure relief piece 600 to move in the first direction, and because the first limiting portion 510 is in the moving direction of the fastening portion 612, when the fastening portion 612 abuts against the first limiting portion 510, the movable end 210 continues to move in the first direction, so that the sealing section 620 and the movable end 210 relatively move, and the pressure relief section 630 is communicated with the air cavity, and thus, the air pressure in the air bag 200 can be discharged from the pressure relief section 630.

Optionally, in an embodiment, the first limiting portion 510 is tapered in the first direction, so that when the pressure relief piece 600 is sleeved on the limiting piece 500 through the sleeve hole 611, the fastening portion 612 may easily pass over the first limiting portion 510, so that the first limiting portion 510 enters the sleeve hole 611.

The second limiting portion 520 is disposed at a plurality of positions, and optionally, in an embodiment, the second limiting portion 520 is disposed at an end of the limiting member 500 near the pressure relief member 600, and the bottom of the socket hole 611 may abut against the second limiting portion 520. Thus, when the gas in the air cavity is discharged from the pressure release section 630, the pressure release section 630 is communicated with the air cavity, the air bag 200 contracts, the movable end 210 drives the pressure release member 600 to move in the second direction, and because the second limiting portion 520 is in the moving direction of the bottom of the sleeve hole 611, when the bottom of the sleeve hole 611 abuts against the second limiting portion 520, the movable end 210 continues to move in the second direction, so that the pressure release section 630 and the movable end 210 move relatively, and the sealing section 620 is connected with the movable end 210 in a sealing manner. In another embodiment, the second limiting portion 520 is disposed outside the socket hole 611, the socket hole 611 has a socket, and a periphery of the socket can be abutted against the second limiting portion 520. Thus, when the gas in the air cavity is discharged from the pressure release section 630, the pressure release section 630 is communicated with the air cavity, the air bag 200 contracts, the movable end 210 drives the pressure release member 600 to move in the second direction, and because the second limiting part 520 is arranged in the moving direction of the periphery of the sleeve interface, when the periphery of the sleeve interface is propped against the second limiting part 520, the movable end 210 continues to move in the second direction, so that the pressure release section 630 and the movable end 210 relatively move, and the sealing section 620 is in sealing connection with the movable end 210.

Optionally, in an embodiment, the material of the pressure relief piece 600 is configured as POM (polyoxymethylene), so that the outer surface of the pressure relief piece 600 is smooth, the pressure relief piece 600 can achieve a self-lubricating effect, and thus the sliding resistance between the pressure relief piece 600 and the limiting piece 500 is small. Of course, in other embodiments, the inner surface of the socket hole 611 is provided with a lubrication layer to reduce the resistance between the relief piece 600 and the stopper 500.

There are many specific forms of the pressure relief section 630, and optionally, in an embodiment, the outer peripheral surface of the pressure relief section 630 is provided with a pressure relief groove 631, and in the pressure relief state, the pressure relief groove 631 communicates with the air cavity. In this way, the air cavity can be communicated with the outside through the pressure relief groove 631, and the air in the air cavity can be discharged to the outside from the pressure relief groove 631, so that pressure relief is realized. However, in other embodiments, the movable end 210 is provided with a through hole 211 through which the pressure relief member 600 passes, the sealing section 620 is configured to be in sealing engagement with the through hole 211, and the cross-sectional area of the pressure relief member 600 is smaller than that of the through hole 211, so that when the pressure relief member 600 moves along the second direction relative to the movable end 210, the sealing section 620 is separated from the through hole 211, and a space between the inner peripheral surface of the through hole 211 and the outer peripheral surface of the pressure relief section 630 is communicated with the air cavity, so that the air in the air cavity can be exhausted to the outside.

Optionally, in an embodiment, the limiting section 610 and the sealing section 620 are coaxially disposed, the radius of the limiting section 610 is larger than the radius of the sealing section 620, so, when the gas in the air cavity is discharged from the pressure releasing section 630, the pressure releasing section 630 is communicated with the air cavity, the air bag 200 contracts, the movable end 210 drives the pressure releasing member 600 to move in the second direction, when the limiting section 610 of the pressure releasing member 600 abuts against the second limiting section 520, the movable end 210 continues to move in the second direction, so that the pressure releasing section 630 and the movable end 210 move relatively, and the sealing section 620 and the movable end 210 are in sealing connection, and because the radius of the limiting section 610 is larger than the radius of the sealing section 620, the movable end 210 can also abut against the cross section of the limiting section 610 close to the sealing section 620, and at this time, the sealing performance of the air bag 200 can be enhanced by the limiting section 610.

Optionally, in an embodiment, the movable end 210 is provided with a through hole 211 through which the pressure relief member 600 passes, and the outer peripheral surface of the pressure relief section 630 is provided with an anti-release portion 632, where the anti-release portion 632 is used to abut against the periphery of the through hole 211. Thus, when the air chamber is inflated, the sealing section 620 is in sealing connection with the movable end 210, the movable end 210 drives the pressure release member 600 to move in the first direction, and when the limit section 610 of the pressure release member 600 abuts against the first limit portion 510, the movable end 210 continues to move in the first direction, so that the sealing section 620 and the movable end 210 relatively move, and the pressure release section 630 is communicated with the air chamber, and since the anti-release portion 632 is located outside the air chamber 200, the periphery of the through hole 211 abuts against the anti-release portion 632, the movable end 210 can be prevented from moving in the first direction, and separation of the movable end 210 and the pressure release member 600 is avoided.

Optionally, in an embodiment, the pneumatic device 100 further includes a follower 800 slidably disposed on the guide channel, the follower 800 being connected to the movable end 210, and the follower 800 having a hardness greater than that of the movable end 210. The driven member 800 may drive the lifting portion 921 of the lifting module 920 of the pneumatic drain valve 900, and it is understood that the movable end 210 indirectly drives the lifting portion 921 through the driven member 800, and since the hardness of the driven member 800 is greater than that of the movable end 210, it is possible to avoid that the movement track of the lifting portion 921 is not accurate enough when the lifting portion 921 is driven due to the easy deformation of the air bag 200.

Alternatively, in one embodiment, the follower 800 is configured as a follower cartridge with the cartridge mouth of the cartridge facing the airbag 200, and the outer peripheral surface of the cartridge slidably engages the guide channel 710. In this way, the driven cylinder extends the distance of the guide channel 710, specifically, when the movable end 210 extends out of the housing 700 in the first direction, the air bag 200 is further surrounded by the driven cylinder and the housing 700, so that the moving track of the air bag 200 is more accurate, and the pneumatic drain valve 900 equipped with the pneumatic device 100 can be triggered to open and close every time.

Referring to fig. 1 together, the present invention further provides a pneumatic control drain valve 900, where the pneumatic control drain valve 900 includes a drain valve main body 910, a pneumatic device 100, and a lifting module 920, and the specific structure of the pneumatic device 100 refers to the foregoing embodiments, and since the pneumatic control drain valve 900 adopts all the technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are not described herein in detail. The pneumatic device 100 is disposed on the drain valve main body 910, and the lifting module 920 includes a lifting portion 921 in transmission connection with the movable end 210 of the pneumatic device 100, where the lifting portion 921 is disposed above the movable end 210. Thus, when the air cavity of the pneumatic device 100 is inflated, the sealing section 620 is in sealing connection with the movable end 210, the movable end 210 drives the pressure release member 600 to move in the first direction, the movable end 210 can lift the lifting portion 921 in a direct or indirect manner, the lifting portion 921 drives the lifting module 920 to lift, so that the switch of the pneumatic drain valve 900 is opened, when the limiting section 610 of the pressure release member 600 abuts against the first limiting section 510, the movable end 210 continues to move in the first direction, so that the sealing section 620 and the movable end 210 move relatively, and the pressure release section 630 is communicated with the air cavity, and thus, the air pressure in the air cavity can be discharged from the pressure release section 630. In the process that the gas in the air cavity is discharged to the outside from the pressure release section 630, the pressure release section 630 is communicated with the air cavity, the air bag 200 contracts, the movable end 210 drives the pressure release member 600 to move towards the second direction, it is worth mentioning that the lifting part 921 is arranged above the movable end 210, the lifting part 921 can give the movable end 210 a force moving towards the second direction due to self weight, the air bag 200 contracts in an accelerating manner, the air bag 200 is helped to reset, when the limiting section 610 of the pressure release member 600 abuts against the second limiting part 520, the movable end 210 continues to move towards the second direction, and therefore the pressure release section 630 and the movable end 210 move relatively, and the sealing section 620 is in sealing connection with the movable end 210. It should be noted that, in the case that the pressure applied by the movable end 210 and the limiting section 610 abuts against the second limiting portion 520, the movable end 210 and the pressure release member 600 are also relatively easy to displace, so that the sealing section 620 is relatively easy to be in sealing connection with the movable end 210.

Optionally, in an embodiment, the lifting module 920 further includes a lifting rod 922, the lifting portion 921 is disposed on an outer circumferential surface of the lifting rod 922, and the starting module is disposed on a side of the lifting rod 922. Thus, the length of the pneumatic drain valve 900 is not too long, and the structure of the pneumatic drain valve 900 is compact.

Optionally, in an embodiment, two pneumatic devices 100 are provided, two lifting modules 920 are provided, and one lifting module 920 is respectively provided corresponding to one pneumatic device 100, so that different lifting rods 922 can be lifted to correspond to different drainage amounts.

The invention also provides a water tank, the water tank comprises a tank body and the pneumatic control drain valve 900, the specific structure of the pneumatic control drain valve 900 refers to the above embodiment, and as the water tank adopts all the technical schemes of all the embodiments, the water tank at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted. Wherein, the pneumatic drain valve 900 is arranged on the box body.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A pneumatic device, comprising:

a housing provided with a guide passage extending in a first direction;

2. The pneumatic device of claim 1, wherein the stop segment is slidably disposed on the stop member.

3. The pneumatic device of claim 2, wherein the stop segment is provided with a socket extending in a first direction, the stop member slidably disposed through the socket.

4. A pneumatic device as claimed in claim 3, wherein the socket has a socket, the inner periphery of the socket is provided with a fastening portion, the first limiting portion is disposed in the socket, and the fastening portion can abut against the first limiting portion.

5. A pneumatic device as claimed in claim 3, wherein the second limiting portion is provided at an end of the limiting member adjacent to the pressure relief member, and a bottom of the socket hole is adapted to abut against the second limiting portion.

6. A pneumatic device as claimed in claim 3, wherein the second stop portion is disposed outside the socket aperture, and the second stop portion and the stop segment are disposed in sequence in the first direction.

7. The pneumatic device of claim 1, further comprising a follower slidably disposed in the guide channel, the follower coupled to the movable end, the follower having a hardness greater than the movable end.

8. The pneumatic device of claim 7, wherein the follower is configured as a follower cylinder with a cylinder mouth facing the air bag, and an outer peripheral surface of the follower cylinder is in sliding engagement with the guide channel.

9. A pneumatically controlled drain valve, comprising:

a drain valve body;

the pneumatic device according to any one of claims 1 to 8, provided to the drain valve main body; and

the lifting module comprises a lifting part in transmission connection with the movable end of the pneumatic device, and the lifting part is arranged above the movable end.

10. A water tank, comprising:

a case; and

the pneumatic drain valve as defined in claim 9, disposed in said tank.