CN209925659U

CN209925659U - Manual oil field flat gate valve with double sealing structure

Info

Publication number: CN209925659U
Application number: CN201920583149.5U
Authority: CN
Inventors: 谢真如; 邓松
Original assignee: Zhejiang Sifang Valve Co Ltd
Current assignee: Zhejiang Sifang Valve Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-01-10
Anticipated expiration: 2029-04-26

Abstract

The utility model belongs to the technical field of plate gate valves, in particular to a manual oil field plate gate valve with a double sealing structure, which comprises a valve body, a gate plate, a first valve rod and a first hand wheel, wherein the inner wall of the gate plate is connected with two sealing blocks in a sliding way, the two sealing blocks are symmetrically arranged, the inner side wall of each sealing block is fixedly connected with a connecting plate, the inner wall of the gate plate is provided with a spring groove, the outer wall of each sealing block is sleeved with a spring, and the spring is positioned in the spring groove; when the flashboard is in the closed position, the second valve rod is pressed downwards, the conical surface is in contact with the wedge groove on the wedge block, the second valve rod is continuously pressed downwards, the wedge block moves towards two sides under the action of the conical surface and the wedge groove, so that the connecting plate drives the sealing block to move outwards, the sealing block is in contact with the inner wall of the channel of the valve body, the channel of the valve body is sealed, the sealing area is effectively increased, the sealing effect is obviously improved, and petroleum leakage is still prevented after the sluice valve is closed.

Description

Manual oil field flat gate valve with double sealing structure

Technical Field

The utility model relates to a plate valve field specifically is a manual oil field plate valve of double seal structure.

Background

The flat gate valve is a slide valve with parallel gate plates as closing members, and the closing members can be single gate plates or double gate plates with a spreading mechanism between them, the pressing force of the gate plates to the valve seat is controlled by the medium pressure acting on the floating gate plates or the floating valve seat, if the flat gate valve is a double-gate flat gate valve, the spreading mechanism between the two gate plates can supplement the pressing force, and the flat gate valve can be divided into a manual flat gate valve, a pneumatic flat gate valve and an electric flat gate valve according to the driving mode. The gate valve can be divided into a plate gate valve with a diversion hole, a plate gate valve without a diversion hole, an oil field plate gate valve, a pipeline plate gate valve, a gas plate gate valve and the like according to the application and the use occasion.

The flashboard structure of current manual oil field plate gate valve is comparatively single, when the gate valve was closed, only cut off the circulation passageway of gate valve through the flashboard, and sealing means is comparatively single, and because the chemical property of oil is comparatively dangerous, in case take place to reveal, can cause serious consequence.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a double seal structure's manual oil field plate valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a manual oilfield flat gate valve with a double sealing structure comprises a valve body, a gate plate, a first valve rod and a first hand wheel, wherein the inner wall of the gate plate is connected with two sealing blocks in a sliding mode, the two sealing blocks are symmetrically arranged, the inner side wall of each sealing block is fixedly connected with a connecting plate, the inner wall of the gate plate is provided with a spring groove, the outer wall of each sealing block is sleeved with a spring, the spring is located in the spring groove, one end of the spring is connected with the connecting plate, the end face, far away from the sealing blocks, of the connecting plate is fixedly connected with a wedge block, the wedge block is provided with wedge grooves, the size and the position of the wedge grooves on the two wedge blocks are corresponding, the inner wall of the first valve rod is connected with a second valve rod in a sliding mode, the bottom end of the second valve rod is provided with a conical surface, the conical surface corresponds to the size of the wedge grooves, the second valve rod is in threaded connection with the second hand wheel.

As a further aspect of the present invention: first screw thread has been seted up to the top outer wall of first valve rod, first valve rod pass through first screw thread with first handwheel threaded connection.

As a further aspect of the present invention: the middle position of the first hand wheel is fixedly connected with a first rotating seat, and the first hand wheel is in threaded connection with the first valve rod through the first rotating seat.

As a further aspect of the present invention: and a second thread is formed on the outer wall of the top end of the second valve rod, and the second valve rod is in threaded connection with the second hand wheel through the second thread.

As a further aspect of the present invention: and a second rotating seat is fixedly connected to the middle position of the second hand wheel, and the second hand wheel is in threaded connection with the second valve rod through the second rotating seat.

As a further aspect of the present invention: the material of sealed piece is rubber, just sealed piece with the flashboard is interference fit.

As a further aspect of the present invention: the spring is a compression spring.

Compared with the prior art, the beneficial effects of the utility model are that:

when the flashboard is in the closed position, rotate the second hand wheel, under the effect of screw thread, the second valve stem pushes down, the groove contact of carving on conical surface and the wedge, the second valve stem continuously pushes down, under the effect of conical surface and carving the groove, the wedge moves to both sides, make the connecting plate drive sealed piece and move to the outside, the contact of the passageway inner wall of sealed piece and valve body, and seal the passageway of valve body, effectively increase sealed area, make sealed effect show the promotion, still have the oil to spill after preventing the gate valve from closing, the security improves.

Drawings

FIG. 1 is a schematic structural diagram of a manual oilfield plate gate valve with a double sealing structure;

FIG. 2 is a schematic diagram showing the internal structure of a valve body in a manual oilfield plate gate valve with a double sealing structure;

FIG. 3 is a schematic diagram of the internal structure of a gate plate in a manual oilfield plate gate valve with a double sealing structure;

FIG. 4 is a schematic diagram of a wedge block structure in a manual oilfield plate gate valve with a double sealing structure;

fig. 5 is a schematic view illustrating the installation of a first hand wheel and a second hand wheel in the manual oilfield plate gate valve with a double sealing structure.

In the figure: 1. a valve body; 2. a shutter plate; 201. a spring slot; 21. a sealing block; 22. a connecting plate; 23. a wedge block; 231. a groove is carved; 24. a spring; 3. a first valve stem; 31. a first thread; 4. a second valve stem; 401. a conical surface; 41. a second thread; 5. a first hand wheel; 51. a first rotating base; 6. a second hand wheel; 61. and a second rotating seat.

Detailed Description

Referring to fig. 1 to 5, in an embodiment of the present invention, a manual plate gate valve for an oil field with a double sealing structure includes a valve body 1, a gate plate 2, a first valve rod 3 and a first hand wheel 5, wherein two sealing blocks 21 are slidably connected to an inner wall of the gate plate 2, the two sealing blocks 21 are symmetrically arranged, a connecting plate 22 is fixedly connected to an inner side wall of each sealing block 21, a spring groove 201 is formed in the inner wall of the gate plate 2, springs 24 are respectively sleeved on outer walls of the sealing blocks 21, the springs 24 are located in the spring grooves 201, one end of each spring 24 is connected to the connecting plate 22, wedge blocks 23 are respectively fixedly connected to end faces of the connecting plate 22 far away from the sealing blocks 21, wedge grooves 231 are formed in the wedge blocks 23, sizes and positions of the wedge grooves 231 on the two wedge blocks 23 are corresponding to each other, a second valve rod 4 is slidably connected to an inner wall of the first valve rod 3, a conical, the top end of the first valve rod 3 is rotatably connected with a second wheel 6, and the second valve rod 4 is in threaded connection with the second wheel 6.

In fig. 1: including valve body 1, first valve rod 3, second valve rod 4, first hand wheel 5 and second hand wheel 6, through rotating first hand wheel 5 and second hand wheel 6, can drive first valve rod 3 and second valve rod 4 and rotate, realize the control to 1 inside flashboard 2 of valve body.

In fig. 2: the inside of valve body 1 is equipped with flashboard 2, and the first valve rod 3 of top fixedly connected with of flashboard 2 realizes the switch of gate valve through the control of first valve rod 3 to flashboard 2.

In fig. 3: the inner wall of the gate plate 2 is slidably connected with two sealing blocks 21, the two sealing blocks 21 are symmetrically arranged, the inner side wall of each sealing block 21 is fixedly connected with a connecting plate 22, the inner wall of the gate plate 2 is provided with a spring groove 201, the outer wall of each sealing block 21 is sleeved with a spring 24, each spring 24 is a compression spring, each spring 24 is positioned in the spring groove 201, one end of each spring 24 is connected with the connecting plate 22, the end surface, far away from the sealing block 21, of each connecting plate 22 is fixedly connected with a wedge block 23, each wedge block 23 is provided with a wedge groove 231, the size and the position of each wedge groove 231 on each wedge block 23 are corresponding to each other, the inner wall of the first valve rod 3 is slidably connected with a second valve rod 4, the bottom end of the second valve rod 4 is provided with a conical surface 401, the conical surface 401 corresponds to the size of each wedge groove 231, when the gate plate 2 is at a closed position, the second valve rod, under the effect of the conical surface 401 and the wedge groove 231, the wedge block 23 moves towards two sides, so that the connecting plate 22 drives the sealing block 21 to move towards the outside, the sealing block 21 contacts with the inner wall of the channel of the valve body 1 and seals the channel of the valve body 1, the sealing area is effectively increased, the sealing effect is obviously improved, oil leakage after the gate valve is closed is avoided, when the gate valve needs to be opened again, the second valve rod 4 is lifted until the second valve rod 4 is separated from the contact with the wedge block 23, meanwhile, the sealing block 21 and the connecting plate 22 contract inwards under the effect of the spring 24 until the sealing block 21 completely contracts into the gate plate 2, the gate plate 2 is lifted upwards through the first valve rod 3, the gate valve is opened, the sealing block 21 is made of rubber, the sealing block 21 and the gate plate 2 are in interference fit, the sealing performance is effectively improved, and leakage is prevented.

In fig. 4: the wedge blocks 23 are provided with wedge grooves 231, the sizes and the positions of the wedge grooves 231 on the two wedge blocks 23 are corresponding, the second valve rod 4 is pressed downwards, the conical surface 401 is in contact with the wedge grooves 231 on the wedge blocks 23, the second valve rod 4 is continuously pressed downwards, and under the action of the conical surface 401 and the wedge grooves 231, the wedge blocks 23 move towards two sides, so that the connecting plate 22 drives the sealing blocks 21 to move outwards, and the additional sealing effect of the sealing blocks 21 on the gate valve is achieved.

In fig. 5: the outer wall of the top end of the first valve rod 3 is provided with a first thread 31, the first valve rod 3 is in threaded connection with a first hand wheel 5 through the first thread 31, the middle position of the first hand wheel 5 is fixedly connected with a first rotating seat 51, the first hand wheel 5 is in threaded connection with the first valve rod 3 through the first rotating seat 51 to rotate the first hand wheel 5, under the action of the screw thread, the first valve rod 3 is lifted and descended, the control of the flashboard 2 in the valve body 1 is realized, the second screw thread 41 is arranged on the outer wall of the top end of the second valve rod 4, the second valve rod 4 is in threaded connection with the second hand wheel 6 through the second screw thread 41, the second rotating seat 61 is fixedly connected at the middle position of the second hand wheel 6, the second hand wheel 6 is in threaded connection with the second valve rod 4 through the second rotating seat 61, the second hand wheel 6 is rotated, under the action of the screw thread, the second valve rod 4 is lifted and lowered, and the gate plate 2 in the valve body 1 is controlled.

The utility model discloses a theory of operation is: when the gate plate 2 is at a closed position, the second hand wheel 6 is rotated, the second valve rod 4 is pressed downwards under the action of the threads, the conical surface 401 is in contact with the wedge groove 231 on the wedge block 23, the second valve rod 4 is continuously pressed downwards, the wedge block 23 moves towards two sides under the action of the conical surface 401 and the wedge groove 231, the connecting plate 22 drives the sealing block 21 to move outwards, the sealing block 21 is in contact with the inner wall of the channel of the valve body 1 and seals the channel of the valve body 1, the sealing area is effectively increased, the sealing effect is obviously improved, oil leakage is prevented after the gate valve is closed, when the gate valve needs to be opened, the second hand wheel 6 is rotated reversely, the second valve rod 4 is lifted under the action of the threads until the second valve rod 4 is out of contact with the wedge block 23, meanwhile, the sealing block 21 and the connecting plate 22 are retracted inwards under the action of the spring 24 until the sealing block 21 is completely retracted into the gate plate 2, the first hand wheel 5, under the effect of screw thread, first valve rod 3 rises for first valve rod 3 promotes flashboard 2 upwards, and the gate valve link up, realizes opening the gate valve.

Claims

1. The manual oilfield plate gate valve with the double sealing structure comprises a valve body (1), a flashboard (2), a first valve rod (3) and a first hand wheel (5), and is characterized in that the inner wall of the flashboard (2) is connected with two sealing blocks (21) in a sliding manner, the two sealing blocks (21) are symmetrically arranged, a connecting plate (22) is fixedly connected to the inner side wall of each sealing block (21), a spring groove (201) is formed in the inner wall of the flashboard (2), springs (24) are sleeved on the outer wall of each sealing block (21), the springs (24) are located in the spring grooves (201), one ends of the springs (24) are connected with the connecting plate (22), the connecting plate (22) is far away from wedge blocks (23) which are fixedly connected to the end faces of the sealing blocks (21), wedge grooves (231) are formed in the wedge blocks (23), and the size and the position of the wedge grooves (231) on the two wedge blocks (23) are corresponding, the inner wall sliding connection of first valve rod (3) has second valve rod (4), conical surface (401) have been seted up to the bottom of second valve rod (4), conical surface (401) with it is corresponding to carve groove (231) size, the top of first valve rod (3) is rotated and is connected with second hand wheel (6), second valve rod (4) with second hand wheel (6) threaded connection.

2. The manual oilfield plate gate valve with the double sealing structure according to claim 1, wherein the top end outer wall of the first valve rod (3) is provided with a first thread (31), and the first valve rod (3) is in threaded connection with the first hand wheel (5) through the first thread (31).

3. The manual oilfield plate gate valve with a double sealing structure according to claim 1, wherein a first rotating seat (51) is fixedly connected to an intermediate position of the first hand wheel (5), and the first hand wheel (5) is in threaded connection with the first valve rod (3) through the first rotating seat (51).

4. The manual oilfield plate gate valve with the double sealing structure according to claim 1, wherein the second valve rod (4) is provided with a second thread (41) on the outer wall of the top end thereof, and the second valve rod (4) is in threaded connection with the second hand wheel (6) through the second thread (41).

5. The manual oilfield plate gate valve with the double sealing structure according to claim 1, wherein a second rotating seat (61) is fixedly connected to the middle position of the second hand wheel (6), and the second hand wheel (6) is in threaded connection with the second valve rod (4) through the second rotating seat (61).

6. The manual oilfield plate gate valve with the double sealing structure according to claim 1, wherein the sealing block (21) is made of rubber, and the sealing block (21) and the gate plate (2) are in interference fit.

7. A manual oilfield plate gate valve of a double sealing structure according to claim 1, wherein the spring (24) is a compression spring.