CN215980887U

CN215980887U - Gate valve

Info

Publication number: CN215980887U
Application number: CN202121997040.XU
Authority: CN
Inventors: 王天琪; 卢明鑫; 卢明伟; 卢志春; 卢明发
Original assignee: Southeast Pipe & Valve Co ltd
Current assignee: Southeast Pipe & Valve Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-03-08
Anticipated expiration: 2031-08-23

Abstract

The utility model provides a gate valve which comprises a valve seat, a valve cover fixedly connected to the valve seat, a gate plate, a hand wheel, a handle or a motor, wherein the gate plate is connected to the valve seat in a sliding mode, the hand wheel, the handle or the motor is arranged in the valve seat, a through hole for allowing fluid to pass through is formed in the valve seat, a containing cavity for containing the gate plate is formed between the valve seat and the valve cover, a sliding groove communicated with the containing cavity is formed in the side wall of the through hole, a positioning groove is formed in the side wall of the sliding groove, which is far away from the containing cavity, the gate plate is connected to the inside of the sliding groove in a sliding mode, and a positioning block matched with the positioning groove is fixedly connected to or integrally connected to the gate plate. Through setting up constant head tank and the locating piece of mutually supporting, when closing the gate valve, because the locating piece alternates in the constant head tank, the skew appears in the gate valve is difficult under the water pressure effect, and sealing performance is better relatively.

Description

Gate valve

Technical Field

The utility model relates to a pipeline valve, in particular to a gate valve.

Background

A gate valve is a valve commonly used in pipeline connection, and generally includes a valve seat and a gate plate, the valve seat has a through hole for passing fluid, and the through hole or the through hole is controlled by the movement of the gate plate.

When current gate valve was in the closed condition, the flashboard generally directly compressed tightly on fenestrate inside wall, and the skew appears easily in the position between flashboard and the fenestrate inside wall under hydraulic effect, influences the sealing performance of gate valve.

In view of the above, the applicant has made an intensive study on the structure of the gate valve, and has made this proposal.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a gate valve with relatively good sealing performance.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a gate valve, includes disk seat, fixed connection valve gap, sliding connection on the disk seat are in flashboard in the disk seat and be used for the drive gliding hand wheel of flashboard, handle or motor, the disk seat has the perforation that is used for supplying the fluid to pass through, the disk seat with be formed with between the valve gap and be used for placing the chamber of accomodating of flashboard, seted up on the fenestrate lateral wall with accomodate the spout of chamber intercommunication, the spout is kept away from accomodate the lateral wall of one side in chamber and seted up the constant head tank, flashboard sliding connection be in the spout, just fixed connection or an organic whole be connected with on the flashboard with constant head tank complex locating piece.

As a modification of the utility model, there are two chutes, and the shutter is simultaneously slidably connected in the two chutes.

As an improvement of the utility model, the through hole is a round hole, the groove bottom of the positioning groove is tangent to the inner side wall of the through hole, and the flashboard is simultaneously pressed on the groove bottom of the positioning groove and the inner side wall of the through hole when the valve is closed.

As an improvement of the utility model, a lower operation hole communicated with the containing cavity is formed in the valve cover, a T-shaped groove is formed in the gate plate, a connecting block is embedded in the T-shaped groove, a through hole is formed in the bottom of the T-shaped groove, a valve rod is spirally connected to the connecting block and inserted into the through hole, one end of the valve rod, far away from the through hole, penetrates through the lower operation hole and is fixedly connected with the hand wheel, the handle or an output shaft of the motor, and a first sealing ring is arranged between the inner side wall of the lower operation hole and the valve rod.

As an improvement of the present invention, a counter bore coaxially arranged with the lower operation hole is formed in one side of the valve cover away from the receiving cavity, a convex ring is fixedly connected or integrally connected to the position of the valve rod above the first sealing ring, the convex ring is located in the counter bore, a gland directly or indirectly pressed against the convex ring is further fixedly connected to the valve cover, an upper operation hole for the valve rod to pass through is formed in the gland, and an annular sealing gasket covering the counter bore is arranged between the gland and the valve cover.

As an improvement of the utility model, two sides of the convex ring are respectively stuck with a wear-resistant gasket.

As a modification of the utility model, at least two second sealing rings are arranged between the inner side wall of the upper operation hole and the valve rod.

As an improvement of the present invention, the gland is provided with an oil injection hole communicating with the upper operation hole at a position on one side of each of the second seal rings away from the valve cover.

As an improvement of the utility model, a first plug is spirally connected to the oil filling hole.

As an improvement of the utility model, the valve seat is respectively provided with detection holes communicated with the through holes at positions on two sides of the flashboard, and each detection hole is spirally connected with a second plug.

By adopting the technical scheme, the utility model has the following beneficial effects:

1. through setting up constant head tank and the locating piece of mutually supporting, when closing the gate valve, because the locating piece alternates in the constant head tank, the skew appears in the gate valve is difficult under the water pressure effect, and sealing performance is better relatively.

2. Because the tank bottom of constant head tank is tangent with fenestrate inside wall, be convenient for clearly the deposit of adhesion in the constant head tank with the help of the whirl of fluid, help reducing the rotational torque of valve rod simultaneously, further improve the sealing performance between flashboard and the disk seat.

3. Wear-resisting gaskets are respectively attached to the two sides of the convex ring, so that the service life of the valve rod is prolonged, and the valve rod can be better touched by using a hand wheel or a handle.

4. Through setting up the oil filler point, can annotate lubricating oil meeting lubricating grease as required, help improving the life and the sealing performance of sealing washer.

Drawings

FIG. 1 is a schematic structural view of a gate valve according to the present invention;

FIG. 2 is a schematic view of the structure of the gate plate of the gate valve of the present invention;

FIG. 3 is a schematic cross-sectional view of the gate valve of the present invention, with the gate plate omitted;

fig. 4 is a longitudinal sectional view schematically showing the gate valve of the present invention.

The designations in the figures correspond to the following:

10-a valve seat; 11-perforating;

12-a receiving cavity; 13-a chute;

14-a positioning groove; 15-detection holes;

16-a second plug; 20-valve cover;

21-lower operating well; 30-a shutter;

31-a positioning block; a 32-T shaped slot;

33-connecting blocks; 34-a through hole;

35-a slide plate;

40-a hand wheel; 50-a valve stem;

51-a first seal ring; 52-convex ring;

53-wear resistant pads; 60-pressing the cover;

61-upper operating port; 62-an annular seal;

63-a second seal ring; 64-oil holes;

65-a guide sleeve.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments.

As shown in fig. 1 to 4, the present embodiment provides a gate valve, which includes a valve seat 10, a valve cover 20 fixedly connected to the valve seat 10, a gate plate 30 slidably connected in the valve seat 10, and a hand wheel 40, a handle or a motor for driving the gate plate to slide, in the present embodiment, the hand wheel 40 is used for driving the gate plate 30 to slide, and the hand wheel 40 is a hand wheel commonly used in existing gate valves and will not be described in detail here.

When the hand wheel 40 is arranged upward, the hand wheel 40 is the uppermost end of the gate valve, and for convenience of description, in this embodiment, one end of the gate valve having the hand wheel 40 is taken as an upper end, and the corresponding other end is taken as a lower end; the axial direction of the through hole 11, which will be mentioned below, is the lateral direction of the gate valve, and the radial direction of the through hole 11, which will be mentioned below, is the longitudinal direction of the gate valve.

The valve seat 10 is provided with a through hole 11 for passing fluid, the through hole 11 is a circular hole horizontally arranged, a receiving cavity 12 for placing the shutter 30 is formed between the valve seat 10 and the valve cover 20, and the receiving cavity 12 is positioned above the through hole 11 and is communicated with the through hole 11. The lateral wall of perforation 11 is equipped with spout 13 with receiving chamber 12 intercommunication, and this spout 13 is arranged perpendicularly with the axis of perforation 11, and preferred, spout 13 has two, and two spout 13 symmetrical arrangement, and the tank bottom of two constant head tank 13 all is tangent with the inside wall of perforation 11. The side wall of each sliding chute 13 far away from the containing cavity 12 is provided with a positioning groove 14. In addition, the valve seat 10 is respectively provided with 15 detection holes communicated with the through holes 11 at positions on two sides of the gate plate 30, and each detection hole 15 is spirally connected with a second plug 16, so that the performance of the gate valve can be tested before use, and meanwhile, the states of the water inlet end and the water outlet end of the gate valve can be detected by using a sensor when the gate valve is used, so that the gate valve is more suitable for an intelligent pipeline system.

The valve cover 20 is locked on the seat body 10 by bolts, and a sealing structure is arranged at the connecting position of the valve cover and the seat body, and the specific sealing structure is the same as that of a conventional gate valve. The valve cover 20 is provided with a lower operation hole 21 communicated with the receiving cavity 12, and one side of the valve cover 20 far away from the receiving cavity 12 is provided with a counter bore coaxially arranged with the lower operation hole 21.

The shutter 30 is arranged perpendicular to the through hole 11 and is slidably connected in the two slide grooves 13 at the same time, and of course, the both sides of the shutter 30 need to be provided with the slide blocks 35 engaged with the slide grooves 13. The gate 30 is fixedly connected or integrally connected with positioning blocks 31 which are matched with the positioning grooves 14 one by one. When the valve is closed (i.e. the gate valve is in a closed state), the gate plate 30 is simultaneously pressed against the groove bottom of the positioning groove 14 and the inner side wall of the through hole 11 to form a seal and intercept the fluid. In addition, in the present embodiment, the connection structure between the gate plate 30 and the hand wheel 40 is similar to that of a conventional gate valve, specifically, a T-shaped groove 32 is formed at the upper end of the gate plate 30, a connection block 33 is embedded in the T-shaped groove 32, a through hole 34 is formed at the bottom of the T-shaped groove 32, a valve rod 50 which is inserted into the through hole 34 at the same time is spirally connected to the connection block 33, of course, a vertically arranged internal threaded hole is formed in the connection block 33, the valve rod 50 is vertically arranged, and the lower half portion of the valve rod has an external threaded section which is matched with the internal threaded hole, and the internal diameter of the through hole 34 is larger than the thread major diameter of the external threaded section; one end of the valve rod 80 far away from the through hole 34 penetrates through the lower operation hole 21 and is fixedly connected with an output shaft of the hand wheel 40, the handle or the motor, so that the driving connection between the gate plate 30 and the hand wheel 40, the handle or the motor is realized.

A first packing 51 is provided between the inner sidewall of the lower operation hole 21 and the valve stem 50 to prevent fluid from leaking therefrom. The valve stem 50 has a male ring 51 fixedly attached or integrally attached at a position above the first seal ring 51, and the male ring 51 is located in the counter bore. In addition, a gland 60 directly or indirectly pressed against the convex ring 51 is fixedly connected to the valve cap 20 to prevent the valve rod 50 from sliding up and down. Preferably, in this embodiment, the two sides of the protruding ring 52 are respectively attached with a wear-resistant pad 53, that is, a wear-resistant pad 53 is clamped between the protruding ring and the bottom surface of the counterbore, and a wear-resistant pad 53 is also clamped between the protruding ring 52 and the lower end surface of the gland 60, so that the wear-resistant pads 53 can function like end-face bearings to some extent.

An upper operation hole 61 for the valve rod 50 to pass through is formed in the gland 60, and an annular sealing gasket 62 for covering the counter bore is arranged between the gland 60 and the valve cover 20 to form radial secondary sealing and improve the sealing effect. At least two second sealing rings 63 are arranged between the inner side wall of the upper operating hole 61 and the valve rod 50, so that the axis can be sealed for multiple times, and the operation hand feeling of the hand wheel 40 is improved.

Preferably, the gland 60 is provided with an oil hole 64 communicating with the upper operation hole 61 at a position on a side (i.e., an upper side) of each second packing 63 away from the bonnet 20, and a first stopper (not shown) is screwed to the oil hole 64. Therefore, lubricating oil can be filled into the sealing ring when needed, so that the service life and the sealing performance of the sealing ring are improved. In addition, the upper end of the upper operation hole 61 is embedded with a guide sleeve 65 penetrating out of the upper operation hole 61, and the guide sleeve 65 is sleeved on the valve rod 50.

The gate valve provided by the embodiment is used in the same way as a conventional gate valve, and is not described in detail here.

The present invention is described in detail with reference to the attached drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention based on the prior art, which fall within the scope of the present invention.

Claims

1. The utility model provides a gate valve, includes disk seat, fixed connection valve gap, sliding connection on the disk seat are in flashboard in the disk seat and be used for the drive gliding hand wheel of flashboard, handle or motor, the disk seat has the perforation that is used for supplying the fluid to pass through, the disk seat with be formed with between the valve gap and be used for placing the chamber of accomodating of flashboard, a serial communication port, seted up on the fenestrate lateral wall with accomodate the spout of chamber intercommunication, the spout is kept away from accomodate the lateral wall of one side in chamber and seted up the constant head tank, flashboard sliding connection be in the spout, just fixed connection or an organic whole be connected with on the flashboard with constant head tank complex locating piece.

2. The gate valve of claim 1 wherein there are two of said runners and said gate is simultaneously slidably connected within both of said runners.

3. The gate valve of claim 1 wherein said aperture is a circular hole, said gate slot bottom is tangential to the inside wall of said aperture, and said gate plate is simultaneously compressed against said slot bottom and said aperture when said valve is closed.

4. The gate valve of any one of claims 1 to 3, wherein the valve cover is provided with a lower operation hole communicated with the receiving cavity, the gate plate is provided with a T-shaped groove, a connecting block is embedded in the T-shaped groove, a through hole is formed in the bottom of the T-shaped groove, the connecting block is spirally connected with a valve rod which is inserted in the through hole, one end of the valve rod, which is far away from the through hole, penetrates through the lower operation hole and is fixedly connected with the hand wheel, the handle or an output shaft of the motor, and a first sealing ring is arranged between the inner side wall of the lower operation hole and the valve rod.

5. The gate valve according to claim 4, wherein a counter bore is formed in a side of the valve cap away from the receiving cavity, the counter bore is coaxially arranged with the lower operation hole, the valve rod is fixedly or integrally connected with a convex ring at a position above the first sealing ring, the convex ring is located in the counter bore, the valve cap is further fixedly connected with a gland which directly or indirectly abuts against and is pressed on the convex ring, the gland is provided with an upper operation hole through which the valve rod passes, and an annular sealing gasket which covers the counter bore is arranged between the gland and the valve cap.

6. The gate valve of claim 5, wherein wear resistant washers are attached to both sides of said male ring.

7. A gate valve according to claim 5, wherein at least two second sealing rings are provided between the inner side wall of the upper operating bore and the valve stem.

8. The gate valve of claim 7, wherein the gland is provided with an oil hole communicating with the upper operation hole at a position on a side of each of the second seal rings remote from the valve cover.

9. The gate valve of claim 8, wherein a first plug is threadably connected to said oil hole.

10. The gate valve according to any one of claims 1 to 3, wherein the valve seat is provided with detection holes at positions on both sides of the gate plate, the detection holes being communicated with the through hole, and a second plug is screwed to each of the detection holes.