CN219529874U

CN219529874U - Automatic plug valve

Info

Publication number: CN219529874U
Application number: CN202320776257.0U
Authority: CN
Inventors: 谷慧丽; 丁翠; 吕忠石; 高亮
Original assignee: Dalian Ruisheng Petroleum Equipment Co ltd
Current assignee: Dalian Ruisheng Petroleum Equipment Co ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-08-15
Anticipated expiration: 2033-04-11

Abstract

The utility model discloses an automatic plug valve, in particular to the technical field of plug valves, which comprises a valve body and a plug block, wherein the plug block is arranged in the valve body, a transmission shaft is fixedly arranged at the top of the plug block, a cavity is formed in the top of the valve body, the top of the transmission shaft penetrates through the valve body and extends into the cavity, an annular sealing groove is formed in the bottom of the cavity, a sealing ring is arranged in the annular sealing groove, a pressing assembly is arranged above the sealing ring and used for pressing the sealing ring, and the pressing assembly comprises a ring plate. According to the utility model, the motor drives the transmission shaft and the plug block to rotate in the valve body, so that the valve body can be automatically opened and closed, the sealing ring plays a sealing role on the outer wall of the transmission shaft, when the valve body operates for a period of time, the electric push rod is used for stretching to push the annular plate to move downwards, the annular plate moves into the annular sealing groove to squeeze the sealing ring, the inner side wall of the sealing ring is tightly attached to the outer wall of the transmission shaft and the inner wall of the annular sealing groove, and the influence of abrasion on the surface of the sealing ring on the sealing ring is avoided.

Description

Automatic plug valve

Technical Field

The utility model relates to the technical field of plug valves, in particular to an automatic plug valve.

Background

The plug valve is a valve which is formed by a plunger-shaped rotary valve of a closing member, and a passage opening on a plug block is communicated with or separated from a passage opening on a valve body through the rotation degree, so that the plug valve is opened or closed. In general, a plug valve includes a valve body having a valve body flow passage and a valve core having a valve core flow passage hole for communicating with the valve body flow passage to open the plug valve. When the plug valve is opened, the valve body flow passage is communicated with the valve core flow passage hole, but the aperture size of the valve body flow passage is consistent with that of the valve core flow passage hole due to the fact that the outlet of the inflow part of the valve body flow passage is consistent with that of the valve core flow passage hole. The plug valve is widely applied to oil field exploitation, transportation and refining equipment, and is also widely applied to industries such as petrochemical industry, chemical industry, coal gas, natural gas, liquefied petroleum gas, heating and ventilation industries and the like.

An automatic compensation sealing plug valve with the publication number of CN201502731U comprises a valve body, a plug cock, a main valve seat, a secondary valve seat, a valve cover, a locating pin, a hand wheel and an elastic sealing element. The valve cavity of the valve body is of a straight-through structure, and the inlet and the outlet are communicated through the axial through holes. The middle section of the axial through hole is provided with an upward longitudinal through hole mounting cock, the valve cover is connected with the valve body positioning cock, and a cylindrical valve seat with automatic compensation capability is formed by a tile-shaped main valve seat and a subsidiary valve seat which are opposite and vertical to each other is arranged between the cock and the valve body. The arc back of the main valve seat is provided with a groove embedded sealing strip, and the bottom of the groove is provided with a through hole with the same diameter as the axial through hole of the valve body and the radial through hole of the cock.

When the sealing plug valve is used, the sealing strips are used for sealing the side edges of the main valve seat and the auxiliary valve seat, and after the sealing plug valve is used for a long time, the surfaces of the sealing strips are worn, so that the sealing effect is reduced, and the internal leakage of the plug valve is caused.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides the automatic plug valve, the transmission shaft and the plug block are driven by the motor to rotate in the valve body, so that the automatic opening and closing of the valve body are realized, the sealing ring plays a sealing role on the outer wall of the transmission shaft, when the valve body operates for a period of time, the electric push rod is used for stretching to push the ring plate to move downwards, the ring plate moves into the annular sealing groove to squeeze the sealing ring, the inner side wall of the sealing ring is tightly attached to the outer wall of the transmission shaft and the inner wall of the annular sealing groove, and the sealing property is prevented from being influenced by the surface abrasion of the sealing ring, so that the problems in the background art are solved.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the automatic plug valve comprises a valve body and a plug block, wherein the plug block is arranged inside the valve body, a transmission shaft is fixedly arranged at the top of the plug block, a cavity is formed in the top of the valve body, the top of the transmission shaft penetrates through the valve body and extends to the inside of the cavity, an annular sealing groove is formed in the bottom of the cavity, a sealing ring is arranged in the annular sealing groove, a pressing assembly is arranged above the sealing ring and used for pressing the sealing ring, the pressing assembly comprises a ring plate, the outer wall of the transmission shaft is sleeved with the ring plate, the bottom of the ring plate is contacted with the top of the sealing ring, six electric push rods are fixedly arranged at the top of the ring plate, a sealing cover is fixedly arranged at the top of the six electric push rods, and a driving assembly is arranged at the top of the sealing cover and used for driving the transmission shaft to rotate.

In a preferred embodiment, the round hole is formed in the bottom of the sealing cover, the top of the transmission shaft is arranged inside the round hole, the clamping groove is formed in the surface of the top of the transmission shaft, a clamping block is arranged in the clamping groove, and the motor is conveniently connected with the transmission shaft by the aid of the clamping block and the clamping groove.

In a preferred embodiment, the driving assembly comprises a motor, the motor is fixed at the top of the sealing cover, the bottom end of the output shaft of the motor penetrates through the sealing cover to be in contact with the top of the transmission shaft, the top of the clamping block is fixedly connected with the bottom of the output shaft of the motor, and the transmission shaft and the cock block are driven to rotate by the motor, so that the valve body can be automatically opened and closed.

In a preferred embodiment, the hollow tubes are arranged inside two sides of the valve body, the filter screens are fixedly arranged inside the two hollow tubes, and the filter screens are inclined, so that impurities in fluid in the valve body can be filtered by using the filter screens.

In a preferred embodiment, the outer wall surface of the hollow tube and the inner wall surfaces of two sides of the valve body are both provided with threads, the hollow tube is in threaded connection with the valve body, the hollow tube is convenient to install and disassemble, and the inside of the hollow tube is cleaned.

In a preferred embodiment, the sealing cover and the valve body are fixed by six screws, and the six screws are distributed in an annular array at the top of the sealing cover, so that the connection firmness between the sealing cover and the valve body is improved.

The utility model has the technical effects and advantages that:

according to the utility model, the motor drives the transmission shaft and the plug block to rotate in the valve body, so that the valve body can be automatically opened and closed, the sealing ring plays a sealing role on the outer wall of the transmission shaft, when the valve body operates for a period of time, the electric push rod is used for stretching to push the annular plate to move downwards, the annular plate moves into the annular sealing groove to squeeze the sealing ring, the inner side wall of the sealing ring is tightly attached to the outer wall of the transmission shaft and the inner wall of the annular sealing groove, and the influence of abrasion on the surface of the sealing ring on the sealing ring is avoided.

The electric push rod and the annular plate are driven to move out of the transmission shaft by the sealing cover which is detached firstly, then the sealing ring in the annular sealing groove can be replaced, when the sealing cover is installed, the clamping block at the bottom of the motor output shaft is required to be inserted into the clamping groove on the rotating transmission shaft, then a plurality of screws are screwed down to continue to be used, hollow pipes are installed in inner cavities at two sides of the valve body, a filter screen inside the hollow pipes can filter impurities in fluid in the valve body, and the impurities are prevented from flowing between the cock block and the valve body, so that the use of the cock block is affected.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a cross-sectional view of a valve body of the present utility model;

FIG. 3 is a front cross-sectional plan view of the valve body and hollow tube of the present utility model;

FIG. 4 is a cross-sectional view of an annular seal groove of the present utility model;

fig. 5 is a cross-sectional view of the seal cap of the present utility model.

The reference numerals are: 1. a valve body; 2. a plug block; 3. a transmission shaft; 4. a cavity; 5. an annular seal groove; 6. a seal ring; 7. a compression assembly; 8. a round hole; 9. a clamping groove; 10. a clamping block; 11. a motor; 12. a hollow tube; 13. a filter screen;

701. a ring plate; 702. an electric push rod; 703. sealing cover.

Description of the embodiments

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

Referring to the accompanying drawings 1-5 of the specification, the utility model provides an automatic plug valve, which comprises a valve body 1 and a plug block 2, wherein the plug block 2 is arranged in the valve body 1, a transmission shaft 3 is fixedly arranged at the top of the plug block 2, a cavity 4 is formed in the top of the valve body 1, the top of the transmission shaft 3 penetrates through the valve body 1 and extends into the cavity 4, an annular sealing groove 5 is formed in the bottom of the cavity 4, a sealing ring 6 is arranged in the annular sealing groove 5, and a pressing assembly 7 is arranged above the sealing ring 6 and used for pressing the sealing ring 6;

specifically, the compressing assembly 7 includes a ring plate 701, the ring plate 701 is sleeved on the outer wall of the transmission shaft 3, the bottom of the ring plate 701 contacts with the top of the sealing ring 6, six electric push rods 702 are fixedly arranged at the top of the ring plate 701, a sealing cover 703 is fixed at the top of the six electric push rods 702, a round hole 8 is formed at the bottom of the sealing cover 703, and the top of the transmission shaft 3 is arranged inside the round hole 8;

the top of the sealing cover 703 is provided with a driving component for driving the transmission shaft 3 to rotate, the driving component comprises a motor 11, the motor 11 is fixed at the top of the sealing cover 703, the bottom end of an output shaft of the motor 11 penetrates through the sealing cover 703 to be in contact with the top of the transmission shaft 3, the top of the clamping block 10 is fixedly connected with the bottom of the output shaft of the motor 11, and the motor 11 is used for driving the transmission shaft 3 and the cock block 2 to rotate, so that the valve body 1 can be automatically opened and closed.

When the through holes on the cock block 2 are communicated with inner cavities on two sides of the valve body 1, the valve body 1 is opened, when the through holes on the cock block 2 are not communicated with the inner cavities on two sides of the valve body 1, namely, the valve body 1 is closed, the inner side wall of the sealing ring 6 in the annular sealing groove 5 is in contact with the outer wall of the transmission shaft 3 to play a role in sealing and leakage prevention, when the valve body 1 is used for a period of time, the electric push rod 702 is used for stretching to push the annular plate 701 to move downwards, the annular plate 701 is used for moving to the annular sealing groove 5 to extrude the sealing ring 6, the inner side wall of the sealing ring 6 is attached to the outer wall of the transmission shaft 3 and the inner wall of the annular sealing groove 5 more tightly, the sealing performance is prevented from being influenced by surface abrasion of the sealing ring 6, the motor 11 and the electric push rod 702 are used for driving the cock block 2 and the annular plate 701 respectively, manual operation is not needed, and the valve body 1 is very convenient to use.

Referring to the attached drawings 1-5 of the specification, the utility model provides an automatic plug valve, the top surface of a transmission shaft 3 is provided with a clamping groove 9, a clamping block 10 is arranged in the clamping groove 9, a motor 11 is conveniently connected with the transmission shaft 3 by utilizing the clamping block 10 and the clamping groove 9, hollow pipes 12 are arranged in two sides of a valve body 1, filter screens 13 are fixedly arranged in the two hollow pipes 12, the filter screens 13 are inclined, and impurities in fluid in the valve body 1 can be filtered by using the filter screens 13;

and the outer wall surface of the hollow pipe 12 and the inner wall surfaces of the two sides of the valve body 1 are both provided with threads, the hollow pipe 12 is in threaded connection with the valve body 1, the hollow pipe 12 is convenient to install and disassemble, the inside of the hollow pipe 12 is cleaned, six screws are fixed between the sealing cover 703 and the valve body 1 through six screws, the six screws are distributed in an annular array at the top of the sealing cover 703, and the connection firmness between the sealing cover 703 and the valve body 1 is improved.

Loosening a plurality of screws between sealed lid 703 and valve body 1, unpacking sealed lid 703 from cavity 4, sealed lid 703 drives electric putter 702 and annular plate 701 and shifts out from transmission shaft 3, then just can change the sealing washer 6 in the annular seal groove 5, when sealed lid 703 is installed, the installer needs to insert fixture block 10 counter rotating the draw-in groove 9 on transmission shaft 3 with the bottom of motor 11 output shaft, then screw up a plurality of screws and can continue to use, and a plurality of screws are simple in structure, it is more convenient to change sealing washer 6, hollow tube 12 is all installed to the inner chamber in valve body 1 both sides, the impurity in the fluid in valve body 1 can be filtered to the inside filter screen 13 of hollow tube 12, avoid impurity to flow to between cock piece 2 and the valve body 1, influence the use of cock piece 2.

Finally: the foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. The automatic plug valve comprises a valve body (1) and a plug block (2), wherein the plug block (2) is arranged inside the valve body (1), and is characterized in that: the top of the cock block (2) is fixedly provided with a transmission shaft (3), the top of the valve body (1) is provided with a cavity (4), and the top of the transmission shaft (3) penetrates through the valve body (1) and extends into the cavity (4);

an annular sealing groove (5) is formed in the bottom of the cavity (4), a sealing ring (6) is arranged in the annular sealing groove (5), and a pressing assembly (7) is arranged above the sealing ring (6) and used for pressing the sealing ring (6);

the compressing assembly (7) comprises a ring plate (701), the ring plate (701) is sleeved on the outer wall of the transmission shaft (3), the bottom of the ring plate (701) is in contact with the top of the sealing ring (6), six electric push rods (702) are fixedly arranged at the top of the ring plate (701), sealing covers (703) are fixedly arranged at the tops of the six electric push rods (702), and a driving assembly is arranged at the top of the sealing covers (703) and used for driving the transmission shaft (3) to rotate.

2. The automatic plug valve according to claim 1, wherein: round holes (8) are formed in the bottoms of the sealing covers (703), the tops of the transmission shafts (3) are arranged inside the round holes (8), clamping grooves (9) are formed in the surfaces of the tops of the transmission shafts (3), and clamping blocks (10) are arranged in the clamping grooves (9).

3. The automatic plug valve according to claim 2, wherein: the driving assembly comprises a motor (11), the motor (11) is fixed at the top of the sealing cover (703), the bottom end of an output shaft of the motor (11) penetrates through the sealing cover (703) to be in contact with the top of the transmission shaft (3), and the top of the clamping block (10) is fixedly connected with the bottom of the output shaft of the motor (11).

4. The automatic plug valve according to claim 1, wherein: hollow tubes (12) are arranged in two sides of the valve body (1), filter screens (13) are fixedly arranged in the two hollow tubes (12), and the filter screens (13) are inclined.

5. The automatic plug valve of claim 4, wherein: the outer wall surface of the hollow pipe (12) and the inner wall surfaces of the two sides of the valve body (1) are both provided with threads, and the hollow pipe (12) is in threaded connection with the valve body (1).

6. The automatic plug valve according to claim 1, wherein: six screws are fixed between the sealing cover (703) and the valve body (1), and the six screws are distributed on the top of the sealing cover (703) in an annular array.