CN216479022U

CN216479022U - Flat gate valve

Info

Publication number: CN216479022U
Application number: CN202122906574.3U
Authority: CN
Inventors: 吉守军; 陈贤孝; 邹雷
Original assignee: Universal Valve Co ltd
Current assignee: Universal Valve Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-05-10
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses a flat gate valve, which adopts the technical scheme that the flat gate valve comprises a valve body, a gate plate and a valve seat, wherein the gate plate comprises a top piece connected with one end of a valve rod, a connecting seat connected with the top piece and two sub gate plates respectively positioned at two sides of the connecting seat, plug connectors are arranged on the opposite surfaces of the two sub gate plates, a plug-in hole for the plug connectors to insert is formed in the connecting seat along the axial line direction of the valve body, a pushing piece which is limited in the connecting seat and is in a round table shape is arranged at one end of the top piece which is not connected with the valve rod, two opposite end surfaces of the two plug connectors are attached to the circumferential surface of the pushing piece, the large end of the pushing piece is connected with the top piece, the diameter of the large end of the pushing piece is larger than that of the connected end of the top piece, spring holes which are communicated with each other and are coaxially arranged are formed in the pushing piece and the two plug connectors, springs with the two sub gate plates are respectively arranged in the spring holes, and the problem that the leakage is caused by abrasion between the gate plate and the large resistance when the valve seat moves relative to the valve seat in the prior art is solved The title is obtained.

Description

Flat gate valve

Technical Field

The utility model relates to the field of gate valves, in particular to a flat gate valve.

Background

The flat gate valve is a sliding valve with a closing part being a parallel gate plate, and the gate plate and the valve seat of the flat gate valve are in close fit. The flat gate valve is widely applied to pipeline systems of petroleum, chemical engineering, natural gas and related products. When the flat gate valve is used, the sealing performance between the gate plate and the valve seat is reduced due to the fact that the processing size between the gate plate and the valve seat is not adaptive or the gate plate and the valve seat are abraded for many times, and when the flat gate valve is in a closed state, media in the valve body can leak from a gap between the gate plate and the valve seat; in the existing flat gate valve, when the gate plate moves relative to the valve seat, the gate plate is tightly attached to the valve seat to generate a large friction force, so that the moving efficiency of the gate plate is influenced, and the driving force of an actuating mechanism is increased.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide the flat gate valve which is good in sealing performance, small in abrasion between the gate plate and the valve seat and convenient to open and close.

In order to achieve the purpose, the utility model provides the following technical scheme: a flat gate valve comprises a valve body, a gate plate positioned in the valve body, a valve rod driving the gate plate to move and a valve seat attached to the end face of the gate plate, wherein the valve seat and the valve body are integrally formed, the gate plate comprises a top piece connected with one end of the valve rod, a connecting seat connected with the top piece and two sub-gate plates respectively positioned at two sides of the connecting seat, plug connectors are arranged on the opposite faces of the two sub-gate plates, a plug hole for the plug connectors to insert is formed in the axial direction of the valve body of the connecting seat, a pushing piece which is limited in the connecting seat and is in a round table shape is arranged at the end of the top piece which is not connected with the valve rod, the two opposite end faces of the two plug connectors are attached to the circumferential face of the pushing piece, the large end of the pushing piece is connected with the top piece, the diameter of the large end of the pushing piece is larger than that of the top piece connected with the pushing piece, the pushing piece and the two plug connectors are provided with spring holes which are mutually communicated and coaxially arranged, the spring that both ends link to each other with two sub-flashboards respectively is provided with in the spring downthehole, makes two plug connectors all keep away from the motion each other and all laminate with the disk seat through pushing away the piece and moving relative to the connecting seat under the promotion of valve rod.

As a further improvement of the utility model, two sealing plates which are respectively attached to the outer walls of the two sub flashboards are arranged on one end, away from the top piece, of the connecting seat.

As a further improvement of the utility model, the outer wall of the connecting seat is provided with a material-saving groove, the material-saving groove is adjacent to the sealing plate, and a plurality of rib plates are arranged in the material-saving groove.

As a further improvement of the utility model, the connecting seat and the pushing piece are respectively provided with a sliding plate and a sliding groove which are mutually inserted and can move relatively, and the length direction of the sliding groove is parallel to the moving direction of the valve rod.

As a further improvement of the utility model, two guide ribs which are parallel to the valve rod are arranged on the inner wall of the valve body, the two sub gate plates are respectively provided with a guide groove, the two guide grooves and the two guide ribs are respectively spliced, and the width of each guide groove is larger than that of each guide rib.

The utility model has the beneficial effects that: the flashboard comprises an ejecting part connected with one end of the valve rod, a connecting seat connected with the ejecting part and two sub flashboards respectively positioned at two sides of the connecting seat, plug connectors are arranged on the opposite surfaces of the two sub flashboards, the connecting seat is provided with plug connection holes for the plug connectors to insert in along the axial direction of the valve rod, the end of the ejecting part which is not connected with the valve rod is provided with a pushing part which is limited in the connecting seat and is in a round table shape, the two opposite end surfaces of the two plug connectors are attached to the circumferential surface of the pushing part, the large end of the pushing part is connected with the ejecting part, the diameter of the large end is larger than that of the end part of the ejecting part which is connected with the pushing part, the pushing part and the two plug connectors are provided with spring holes which are mutually communicated and coaxially arranged, and springs with two ends which are respectively connected with the two sub flashboards are arranged in the spring holes, compared with the design, the prior art, the resistance between the sub flashboards and the valve seat can be reduced when the valve rod drives the sub flashboards to move up and down, the extra output of the executing mechanism can be reduced, the energy is saved, the abrasion between the sub gate plate and the valve seat is slowed down, and the service lives of the sub gate plate and the valve seat are effectively prolonged; when the valve is closed, the two plug connectors move away from each other and are attached to the valve seat through the pushing piece moving relative to the connecting seat under the pushing of the valve rod, and the sub-flashboards are tightly attached to the valve seat to improve the sealing performance and avoid leakage in the prior art.

Drawings

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

fig. 2 is an enlarged view of a point a in fig. 1.

Reference numerals: 1. a valve body; 2. a shutter plate; 3. a valve stem; 4. a valve seat; 5. a top piece; 6. a connecting seat; 7. A sub gate plate; 8. a plug-in unit; 9. inserting holes; 10. pushing the workpiece; 11. a spring hole; 12. a spring; 13. a slide plate; 14. a chute; 15. a guide rib; 16. a guide groove; 17. a material-saving groove; 18. a rib plate; 19. and (7) sealing the plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.

Referring to fig. 1 to 2, the flat gate valve of the present embodiment includes a valve body 1, a gate plate 2 located in the valve body 1, a valve rod 3 driving the gate plate 2 to move, and a valve seat 4 attached to an end surface of the gate plate 2, where the valve seat 4 and the valve body 1 are integrally formed;

based on the prior art, the flashboard 2 comprises an ejecting part 5, a connecting seat 6 and two sub flashboards 7, the ejecting part 5 is formed by welding two identical sub ejecting parts, a groove which is inserted into the end part of the valve rod 3 is formed by the two sub ejecting parts facing inwards, the end part of the valve rod 3 is limited in the ejecting part 5, a pushing part 10 is welded on the end part of the ejecting part 5 which is not connected with the valve rod 3, the pushing part 10 is in a circular truncated cone shape and is coaxially arranged with the valve rod 3, the big end of the pushing part 10 is connected with the ejecting part 5, the diameter of the big end is larger than that of the end part of the ejecting part 5 which is connected with the pushing part, the connecting seat 6 is formed by welding two identical sub connecting seats, a cavity is formed by the two sub connecting seats facing inwards and facing inwards, when the two sub connecting seats are spliced, the pushing part 10 is limited in the cavity in the connecting seat 6, one end surface of the two sub flashboards 7 is provided with a plug connector 8, the connecting seat 6 is provided with a splicing hole 9 for the plug connector 8 to insert, the plug hole 9 is communicated with a cavity in the connecting seat 6, the push piece 10 and the two plug pieces 8 are respectively provided with a spring hole 11 which is communicated with each other and coaxially arranged, one end of a spring 12 is firstly positioned in the plug hole 9 of one of the sub-gate plates 7, then the sub-gate plate 7 connected with the spring 12 is arranged at one side of the connecting seat 6, the spring 12 penetrates through the push piece 10, one end of the spring extends to the other side of the connecting seat 6, then the spring 12 is manually elongated to enable one end of the spring to be pulled out of the connecting seat 6, the end of the spring 12 pulled out of the connecting seat 6 is fixedly connected with the plug hole 9 of the other sub-gate plate 7, finally the plug piece 8 of the other sub-gate plate 7 is inserted into the connecting seat 6 through the recovery deformation of the spring 12, the opposite end surfaces of the two plug pieces 8 are obliquely arranged relative to a vertical plane and attached to the circumferential surface of the push piece 10, a cavity surrounded by the inner wall of the connecting seat 6 is also in a round table shape and when the spring holes 11 of the two plug pieces 8 and the push piece 10 are positioned on the same axis, a gap is formed between the inner wall of the connecting seat 6 and the outer wall of the pushing piece 10;

in an initial state, the valve body 1 is in an opening state, the large end face of the pushing piece 10 is abutted against the connecting seat 6, a gap exists between the inner wall of the connecting seat 6 and the outer wall of the pushing piece 10, the spring 11 is in a natural state, in the process that the valve body 1 is converted from the opening state to the closing state, the valve rod 3 moves downwards until the connecting seat 6 or the sub-gate plate 7 is abutted against the valve body 1, the pushing piece 10 moves downwards relative to the connecting seat 6 along with the continuous downward movement of the valve rod 3, the two plug connectors 8 slide relative to the outer wall of the pushing piece 10, the two sub-gate plates 7 move away from each other and are respectively tightly attached to the corresponding valve seats 4, the spring 12 is in a stretched state, and finally the valve rod 3 stops moving; in the process that the valve body 1 is switched from a closed state to an open state, the valve rod 3 moves upwards, the pushing piece 10 moves upwards relative to the connecting seat, the spring 12 restores to a natural stretching state, the two sub gate plates 7 move towards each other to enable the two sub gate plates 7 to respectively reduce pressure on the corresponding valve seats 4 until the large end of the pushing piece 10 is abutted against the connecting seat 6, the two sub gate plates 7 move upwards along with the connecting seat 6 along with the continuous upward movement of the valve rod 3, and further, the displacement required by the close fit of the two sub gate plates 7 and the valve seats 4 is small, the movement of the pushing piece 10 relative to the connecting seat 6 is also small, and the radial deformation of the spring 12 under the pushing of the pushing piece 10 is also small;

compared with the prior art, the design can reduce the resistance between the sub-gate plate 7 and the valve seat 4, reduce the extra output of the actuating mechanism, save energy, slow down the abrasion between the sub-gate plate 7 and the valve seat 4 and effectively prolong the service life of the sub-gate plate 7 and the valve seat 4; when the valve is in a closed state, the sub gate plate 7 is tightly attached to the valve seat 4, and compared with the prior art, the sealing performance can be improved, and leakage is avoided.

As an improved specific embodiment, referring to fig. 1 to 2, because impurities in the valve body 1 are clamped between the sub-gate plate 7 and the inner wall of the valve body 1, after the sub-gate plate 7 is attached to the inner wall of the valve body 1 and moves along the axial direction of the valve body 1, the abrasion of the contact surfaces of the sub-gate plate 7 and the valve body 1 is accelerated, the sealing performance is affected, and the resistance applied to the sub-gate plate 7 during the movement process is large, in order to solve the above problems, two sealing plates 19 attached to the outer walls of the two sub-gate plates 7 are arranged on one end of the connecting seat 6, which is far away from the top piece 5, respectively, when the valve body 1 is in a closed state, the connecting seat 6 is attached to the inner wall of the valve body 1, and the two sub-gate plates 7 move relative to the sealing plates 19 under the driving of the pushing piece 10, so that the sealing performance between the connecting seat 6 and the valve body 1 is ensured, and the sub-gate plate 7 is also convenient to move relative to the sealing plates 19.

As an improved specific embodiment, referring to fig. 1 to 2, a material saving groove 17 is formed in an outer wall of the connecting seat 6, the material saving groove 17 is adjacent to the sealing plate 19, a plurality of rib plates 18 are arranged in the material saving groove 17, and compared with the design of the material saving groove 17 and the rib plates 18 in the prior art, when the structural strength of the connecting seat 6 is enough, the weight of the connecting seat 6 can be reduced, and the integral driving of the flashboard 3 by an actuating mechanism is facilitated.

As an improved specific embodiment, referring to fig. 2, the connecting seat 6 and the pushing element 10 are respectively provided with a sliding plate 13 and a sliding groove 14 which are inserted into each other and can move relatively, the length direction of the sliding groove 14 is parallel to the moving direction of the valve rod 3, the sliding plate 13 is located between the two inserting elements 8, when the pushing element 10 moves relative to the connecting seat 6, the sliding plate 13 moves linearly relative to the sliding groove 14, so that the design can not only prevent the pushing element 10 from rotating relative to the connecting seat 6, but also can ensure the coaxiality of the pushing element 10 and the valve rod 3, thereby ensuring that the movement of the pushing element 10 relative to the connecting seat 6 keeps straight and can drive the two sub-gate plates 7 to move synchronously.

As an improved specific implementation manner, referring to fig. 1 to 2, two guide ribs 15 which are parallel to the valve rod 3 are arranged on the inner wall of the valve body 1, two sub gate plates 7 are provided with guide grooves 16, the two guide grooves 16 and the two guide ribs 15 are respectively inserted and connected, and the width of each guide groove 16 is greater than that of each guide rib 15, so that the design can ensure that the sub gate plates 7 can keep a vertical state after moving up and down, the phenomenon that the sub gate plates 7 are inclined is avoided, the follow-up comprehensive fit of the sub gate plates 7 with the valve seats 4 is ensured, and the sealing performance is improved.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides a flat gate valve, includes valve body (1), is located flashboard (2) of valve body (1), drives valve rod (3) that flashboard (2) removed and disk seat (4) with the laminating of flashboard (2) terminal surface, disk seat (4) and valve body (1) integrated into one piece, its characterized in that: the gate plate (2) comprises an ejector (5) connected with one end of the valve rod (3), a connecting seat (6) connected with the ejector (5) and two sub gate plates (7) respectively positioned at two sides of the connecting seat (6), wherein plug connectors (8) are arranged on the opposite surfaces of the two sub gate plates (7), plug holes (9) for the plug connectors (8) to insert are formed in the connecting seat (6) along the axis direction of the valve body (1), a pushing part (10) which is limited in the connecting seat (6) and is in a round table shape is arranged at the end, which is not connected with the valve rod (3), of the ejector (5), two opposite end faces of the two plug connectors (8) are attached to the circumferential face of the pushing part (10), the large end of the pushing part (10) is connected with the ejector (5), the diameter of the large end is larger than that of the ejector (5) connected with the pushing part, and spring holes (11) which are mutually communicated and coaxially arranged are formed in the pushing part (10) and the two plug connectors (8), the spring hole (11) is internally provided with a spring (12) with two ends respectively connected with the two sub gate plates (7), and the two plug connectors (8) are enabled to move away from each other and are attached to the valve seat (4) by pushing the pushing piece (10) to move relative to the connecting seat (6) under the pushing of the valve rod (3).

2. A plate gate valve according to claim 1, wherein: and one end of the connecting seat (6) far away from the top piece (5) is provided with two sealing plates (19) which are respectively attached to the outer walls of the two sub-flashboards (7).

3. A plate gate valve according to claim 2, wherein: the connecting seat is characterized in that a material-saving groove (17) is formed in the outer wall of the connecting seat (6), the material-saving groove (17) is adjacent to the sealing plate (19), and a plurality of rib plates (18) are arranged in the material-saving groove (17).

4. A plate gate valve according to claim 1, 2 or 3, wherein: the connecting seat (6) and the pushing piece (10) are respectively provided with a sliding plate (13) and a sliding groove (14) which are mutually inserted and can move relatively, and the length direction of the sliding groove (14) is parallel to the moving direction of the valve rod (3).

5. A plate gate valve according to claim 1, 2 or 3, wherein: be provided with two all with valve rod (3) parallel direction muscle (15), two on the inner wall of valve body (1) sub-flashboard (7) all are provided with guide way (16), two guide way (16) are pegged graft respectively with two direction muscle (15) and the width of guide way (16) is greater than the width of direction muscle (15).