CN217482082U

CN217482082U - Anti-backflow self-closing valve

Info

Publication number: CN217482082U
Application number: CN202221364515.6U
Authority: CN
Inventors: 盛斌
Original assignee: Taizhou Zhenrong Valve Co ltd
Current assignee: Taizhou Zhenrong Valve Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-09-23
Anticipated expiration: 2032-06-02

Abstract

The invention discloses an anti-backflow type self-closing valve which comprises an anti-backflow structure and a sealing structure, wherein the anti-backflow structure comprises a valve body, an exhaust port is formed in the left side of the valve body, a flow passing valve is fixedly connected to the left side inside the valve body, the inside of the flow passing valve is communicated with the exhaust port, an exhaust channel is arranged inside the valve body, the left side of the exhaust channel is communicated with the flow passing valve, two positioning sleeves are fixedly connected to the top and the bottom of the inner wall of the valve body, a limiting rod is inserted between the two positioning sleeves, a backflow ball is placed inside the valve body, and the backflow ball is arranged between the exhaust channel and the limiting rod; the sealing structure comprises a sealing gasket fixedly connected to the top of the valve body, the sealing gasket seals the top of the valve body, the top of the valve body is fixedly connected with a cover, and the sealing gasket is arranged between the valve body and the cover. The anti-backflow type self-closing valve has the advantages of being capable of preventing gas backflow and good in sealing performance.

Description

Anti-backflow self-closing valve

Technical Field

The invention relates to the technical field of self-closing valves, in particular to an anti-backflow self-closing valve.

Background

The gas self-closing valve for pipeline is installed on the pipeline of low-pressure gas system, and when the gas supply pressure of pipeline is under-pressure or over-pressure, it has no need of using electricity or other external power, and can be automatically closed and manually opened. The basic principle of the self-closing valve is that permanent magnetic material is magnetized according to design requirements to form a permanent memory multi-pole permanent magnetic linkage mechanism, changes of gas pressure parameters passing through the permanent magnetic linkage mechanism are identified, and when the gas pressure parameters exceed a safety set value, the valve is automatically closed, and a gas source is cut off.

The existing sealing valve does not have backflow prevention, and when gas flows back, the valve cannot be automatically closed to prevent the gas from flowing back; aiming at the above, the device of the invention has the advantages of gas backflow prevention and good sealing performance.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the anti-backflow type self-closing valve which has the advantages of gas backflow prevention, good sealing performance and the like, and solves the problem that the traditional self-closing valve does not prevent gas backflow.

In order to achieve the purpose, the invention provides the following technical scheme: anti-return type self-closing valve, including anti-return structure and seal structure, anti-return structure is including the valve body, the gas vent has been seted up in the left side of valve body, the inside left side fixedly connected with of valve body crosses the flow valve, the inside and the gas vent of crossing the flow valve are put through mutually, the inside of valve body is provided with exhaust passage, exhaust passage's left side and crossing the flow valve and put through mutually, two inner wall top and the two position sleeves of bottom fixedly connected with of valve body, two it has the gag lever post to peg graft between the position sleeve, the backward flow ball has been placed to the inside of valve body, the backward flow ball is between exhaust passage and gag lever post.

The sealing structure comprises a sealing gasket fixedly connected to the top of the valve body, the sealing gasket seals the top of the valve body, the top of the valve body is fixedly connected with a cover, the sealing gasket is arranged between the valve body and the cover, a paper gasket is inserted between the sealing gasket and the cover, the cover is internally and slidably connected with a lead screw, the lower end of the lead screw is fixedly connected to the sealing gasket, a nut is in threaded connection with the lead screw, an iron pressing plate is sleeved on the lead screw, the iron pressing plate is arranged between the nut and the sealing gasket, a magnet is fixedly connected to the bottom of the sealing gasket, a plastic separation blade is fixedly connected to the bottom of the magnet, an iron cover is fixedly connected to the top of the exhaust passage, and the plastic separation blade is arranged inside the iron cover.

Furthermore, a screw is inserted into the plastic blocking piece, the screw is embedded into the magnet, the exhaust channel is communicated with the inside of the iron cover, and a gasket is fixedly connected to the bottom of the plastic blocking piece.

Further, the upper end of the screw rod is arranged above the cover, the upper end of the screw rod is fixedly connected with a lifting head, the top of the cover is fixedly connected with a lifting outer sleeve, and the lifting head is arranged inside the lifting outer sleeve.

Further, the right side of valve body is inlayed and is had the plastics king, the right side fixedly connected with valve cap of plastics king, the inside air inlet of having seted up of valve cap, the air inlet is put through with the valve body internal portion.

Further, the inside of valve body rotates and is connected with the ball, the top fixedly connected with valve rod of ball, the valve rod rotates to be connected on the valve body.

Furthermore, an O-shaped ring is sleeved on the valve rod, a handle is sleeved at the upper end of the valve rod, and the handle is arranged above the valve body.

Further, the top threaded connection of valve rod has the button head screw, the button head screw is in the inside of handle.

Furthermore, the top of handle is inlayed and is had the sign lid, the sign lid is in the top of button head screw, inside fixedly connected with filter screen, the filter screen is in the left of ball.

Compared with the prior art, the technical scheme of the application has the following beneficial effects:

1. according to the anti-backflow self-closing valve, the backflow ball is placed on the side, close to the exhaust port, of the exhaust channel, and when gas flows back, the backflow ball seals the exhaust channel, so that gas backflow is prevented.

2. The anti-backflow type self-closing valve is double-sealed by installing the plastic separation blade and the sealing gasket, so that the sealing effect inside the valve body is better.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic view of the right side of the present invention;

figure 4 is a schematic view of a seal arrangement of the present invention.

In the figure: the device comprises a valve body 1, a gasket 2, a plastic separation blade 3, an iron cover 4, a magnet 5, a screw 6, a lead screw 7, a sealing gasket 8, an iron pressing plate 9, a nut 10, a paper gasket 11, a cover 12, a lifting outer sleeve 13, a lifting head 14, a flow-passing valve 15, a ball 16, a plastic king 17, a valve rod 18, an O-shaped ring 19, a handle 20, a round-head screw 21, a mark cover 22, a valve cap 23, an exhaust port 24, an air inlet 25, a positioning sleeve 26, a limiting rod 27, a backflow ball 28, a filter screen 29 and an exhaust channel 30.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-4, the anti-backflow self-closing valve in the embodiment includes an anti-backflow structure and a sealing structure, the anti-backflow structure includes a valve body 1, an exhaust port 24 is formed in the left side of the valve body 1, a flow-passing valve 15 is fixedly connected to the left side of the inside of the valve body 1, the inside of the flow-passing valve 15 is communicated with the exhaust port 24, an exhaust passage 30 is arranged inside the valve body 1, the left side of the exhaust passage 30 is communicated with the flow-passing valve 15, two positioning sleeves 26 are fixedly connected to the top and the bottom of the inner wall of the valve body 1, a limiting rod 27 is inserted between the two positioning sleeves 26, a backflow ball 28 is placed inside the valve body 1, and the backflow ball 28 is located between the exhaust passage 30 and the limiting rod 27.

Gas is discharged through the exhaust port 24 in the valve body 1, when gas flows back, gas enters the valve body 1 from the exhaust port 24 at the moment, gas entering the valve body 1 from the exhaust port 24 can generate air pressure, so that the backflow ball 28 is pushed to roll rightwards, the backflow ball 28 rolls rightwards and contacts with the left side of the exhaust channel 30, the exhaust channel 30 is sealed through the backflow ball 28 at the moment, so that gas backflow is prevented, when the gas normally flows, the gas inside the exhaust channel 30 is discharged through the exhaust port 24 at the moment, when the gas passes through the backflow ball 28, the gas pushes the backflow ball 28 to roll leftwards, the backflow ball 28 cannot seal the exhaust channel 30 at the moment, so that the purpose of preventing gas backflow is achieved, the backflow ball 28 can be limited through the limiting rod 27, and the backflow ball 28 can only roll between the limiting rod 27 and the exhaust channel 30.

Seal structure is including the seal gasket 8 of fixed connection at 1 top of valve body, seal gasket 8 is sealed with the top of valve body 1, the top fixedly connected with lid 12 of valve body 1, seal gasket 8 is between valve body 1 and lid 12, it has paper gasket 11 to peg graft between seal gasket 8 and the lid 12, the inside sliding connection of lid 12 has lead screw 7, the lower extreme fixed connection of lead screw 7 is on seal gasket 8, threaded connection has nut 10 on the lead screw 7, iron clamp plate 9 has been cup jointed on the lead screw 7, iron clamp plate 9 is between nut 10 and seal gasket 8, seal gasket 8's bottom fixedly connected with magnet 5, the bottom fixedly connected with plastics separation blade 3 of magnet 5, exhaust passage 30's top fixedly connected with iron cover 4, plastics separation blade 3 is inside iron cover 4.

When the internal gas of valve body 1 appears under-voltage, during the superpressure, the automatic top of adsorbing at iron cover 4 of magnet 5 this moment, magnet 5 descends and adsorbs when 4 are covered, can drive seal gasket 8's middle part undercut, seal gasket 8's middle part contacts with the top of iron cover 4 this moment, thereby with the top seal of iron cover 4, can drive plastics separation blade 3 decline when magnet 5 is descending the in-process, plastics separation blade 3 drives gasket 2 and descends, gasket 2 decline contacts exhaust passage 30's top with exhaust passage 30's top seal, thereby through the top double seal with iron cover 4 and exhaust passage 30, thereby make sealed effect better.

In this embodiment, the screw 6 is inserted into the plastic blocking piece 3, the screw 6 is embedded into the magnet 5, the exhaust passage 30 is communicated with the inside of the iron cover 4, the gasket 2 is fixedly connected to the bottom of the plastic blocking piece 3, the plastic blocking piece 3 and the magnet 5 can be connected more firmly through the screw 6, and the top of the exhaust passage 30 can be sealed through the gasket 2.

In this embodiment, the upper end of the screw rod 7 is above the cover 12, the upper end of the screw rod 7 is fixedly connected with the lifting head 14, the top of the cover 12 is fixedly connected with the lifting jacket 13, the lifting head 14 is connected to the top of the sealing gasket 8 through the screw rod 7 inside the lifting jacket 13, the lifting head 14 is connected to the upper end of the screw rod 7, so that the lifting head 14 is pulled upwards, the lifting head 14 drives the screw rod 7 to move upwards, the middle of the sealing gasket 8 is pulled upwards by the screw rod 7, and the middle of the sealing gasket 8 is pulled upwards to reset after the sealing gasket 8 is sunken downwards for sealing.

In this embodiment, the right side of valve body 1 is inlayed and is had plastics king 17, and the right side fixedly connected with valve cap 23 of plastics king 17, the inside air inlet 25 of having seted up of valve cap 23, and air inlet 25 communicates with the 1 internal portion of valve body, and inside gas carries out valve body 1 through air inlet 25, and the resistant gas corrosion of plastics king 17 can prolong the life of valve body 1.

In this embodiment, the inside of valve body 1 rotates and is connected with ball 16, and the top fixedly connected with valve rod 18 of ball 16, valve rod 18 rotate and connect on valve body 1, can conveniently adjust ball 16 through valve rod 18, and valve rod 18 rotates and can drive ball 16 and rotate.

In this embodiment, the valve rod 18 is sleeved with the O-ring 19, the upper end of the valve rod 18 is sleeved with the handle 20, the handle 20 is arranged above the valve body 1, the handle 20 drives the valve rod 18 to rotate by rotating the handle 20, the valve rod 18 drives the ball 16 to rotate, the ball 16 rotates to seal and open the valve body 1, when the handle 20 and the bonnet 23 are parallel, the valve body 1 is in an open state, and when the handle 20 is perpendicular to the bonnet 23, the valve body 1 is sealed.

In this embodiment, the top of the valve rod 18 is connected with a round head screw 21 through a thread, the round head screw 21 is arranged inside the handle 20, and the handle 20 can be fixed on the valve rod 18 through the round head screw 21, so that the handle 20 is firmly connected with the valve rod 18.

In this embodiment, the top of the handle 20 is embedded with the sign cover 22, the sign cover 22 is above the round head screw 21, the filter screen 29 is fixedly connected to the inside of the ball 1, and the filter screen 29 is on the left of the ball 16, so that the gas entering the inside of the ball 1 can be filtered through the filter screen 29.

The working principle of the above embodiment is as follows:

When the inside gas of valve body 1 appears under-pressure, during the superpressure, 5 automatic absorption at the top of iron cover 4 of magnet this moment, 5 decline of magnet this moment adsorb on iron cover 4 when, can drive seal gasket 8's middle part undercut, seal gasket 8's middle part and iron cover 4's top contact this moment, thereby with the top seal of iron cover 4, can drive plastics separation blade 3 and descend when magnet 5 in-process that descends, plastics separation blade 3 drives gasket 2 and descends, gasket 2 descends and exhaust passage 30's top contact is with exhaust passage 30's top seal, thereby through the top double seal with iron cover 4 and exhaust passage 30, thereby make sealed effect better.

Has the advantages that:

1. in this anti-backflow type self-closing valve, when gas flows backward, the backflow ball 28 seals the exhaust passage 30 by placing the backflow ball 28 on the side of the exhaust passage 30 close to the exhaust port 24, thereby preventing the gas from flowing backward.

2. The anti-backflow type self-closing valve is double-sealed by installing the plastic separation blade 3 and the sealing gasket 8, so that the sealing effect inside the valve body 1 is better.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Anti-return type self-closing valve, including anti-return structure and seal structure, its characterized in that: the backflow prevention structure comprises a valve body (1), an exhaust port (24) is formed in the left side of the valve body (1), a flow passing valve (15) is fixedly connected to the left side of the interior of the valve body (1), the interior of the flow passing valve (15) is communicated with the exhaust port (24), an exhaust channel (30) is formed in the interior of the valve body (1), the left side of the exhaust channel (30) is communicated with the flow passing valve (15), two positioning sleeves (26) are fixedly connected to the top and the bottom of the inner wall of the valve body (1), a limiting rod (27) is inserted between the two positioning sleeves (26), a backflow ball (28) is placed in the interior of the valve body (1), and the backflow ball (28) is located between the exhaust channel (30) and the limiting rod (27);

the sealing structure comprises a sealing gasket (8) fixedly connected to the top of the valve body (1), the sealing gasket (8) seals the top of the valve body (1), the top of the valve body (1) is fixedly connected with a cover (12), the sealing gasket (8) is arranged between the valve body (1) and the cover (12), a paper gasket (11) is inserted between the sealing gasket (8) and the cover (12), a lead screw (7) is slidably connected inside the cover (12), the lower end of the lead screw (7) is fixedly connected to the sealing gasket (8), a nut (10) is in threaded connection with the lead screw (7), an iron pressing plate (9) is sleeved on the lead screw (7), the iron pressing plate (9) is arranged between the nut (10) and the sealing gasket (8), a magnet (5) is fixedly connected to the bottom of the sealing gasket (8), and a plastic blocking piece (3) is fixedly connected to the bottom of the magnet (5), the top of exhaust passage (30) is fixedly connected with iron cover (4), plastics separation blade (3) are inside iron cover (4).

2. The anti-backflow type self-closing valve according to claim 1, characterized in that: the screw (6) is inserted into the plastic blocking piece (3), the screw (6) is embedded into the magnet (5), the exhaust channel (30) is communicated with the inside of the iron cover (4), and the gasket (2) is fixedly connected to the bottom of the plastic blocking piece (3).

3. The anti-backflow type self-closing valve according to claim 1, characterized in that: the upper end of the screw rod (7) is arranged above the cover (12), the upper end of the screw rod (7) is fixedly connected with a lifting sleeve (14), the top of the cover (12) is fixedly connected with a lifting sleeve (13), and the lifting sleeve (13) is internally provided with the lifting sleeve (14).

4. The anti-backflow type self-closing valve according to claim 1, characterized in that: the right side of valve body (1) is inlayed and is had plastics king (17), the right side fixedly connected with valve cap (23) of plastics king (17), air inlet (25) have been seted up to valve cap (23) inside, air inlet (25) are linked together with valve body (1) inner part.

5. The anti-backflow type self-closing valve according to claim 1, characterized in that: the inside rotation of valve body (1) is connected with ball (16), the top fixedly connected with valve rod (18) of ball (16), valve rod (18) rotate to be connected on valve body (1).

6. The anti-backflow type self-closing valve according to claim 5, wherein: an O-shaped ring (19) is sleeved on the valve rod (18), a handle (20) is sleeved at the upper end of the valve rod (18), and the handle (20) is arranged above the valve body (1).

7. The anti-backflow type self-closing valve according to claim 6, characterized in that: the top threaded connection of valve rod (18) has button head screw (21), button head screw (21) are in the inside of handle (20).

8. The anti-backflow type self-closing valve according to claim 7, characterized in that: sign lid (22) are inlayed at the top of handle (20), sign lid (22) are in the top of button head screw (21), the inside fixedly connected with filter screen (29) of valve body (1), filter screen (29) are in the left of ball (16).