CN217977437U

CN217977437U - Gate valve

Info

Publication number: CN217977437U
Application number: CN202221647176.2U
Authority: CN
Inventors: 叶汇川; 叶美春; 叶宝松
Original assignee: Zhangzhou Jiangda Plastic Technology Co ltd
Current assignee: Zhangzhou Jiangda Plastic Technology Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-12-06
Anticipated expiration: 2032-06-29

Abstract

The utility model discloses a gate valve, include: the valve body, the valve gap, sealing member one, the valve plate, the valve rod, hand wheel and at least one sealing member two, wherein, the valve gap can be dismantled and connect in the valve body top, and form the valve pocket with the valve body cooperation, intercommunication valve pocket and outside shaft hole have been seted up to the valve gap, the junction of valve body and valve gap is located to sealing member one, the valve plate is installed in the valve cavity, a screw hole has been seted up at the valve plate top, the valve plate top is located to the valve rod, the valve rod includes screw thread section and shaft part along the axis, the screw thread section stretches into screw hole and valve plate threaded connection, the valve pocket is stretched out from the shaft hole to the shaft part, the junction of screw thread section and shaft part has step portion, step portion and the valve gap are towards the terminal surface butt of one side of valve plate, the hand wheel can be dismantled to connect on the shaft part and keep away from the terminal surface butt of valve plate one side with the valve gap, the sealing member cover is located on the shaft part and with shaft hole inner wall butt. The utility model has the advantages of low manufacturing cost, easy processing production, assembly, disassembly and maintenance.

Description

Gate valve

Technical Field

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

Background

The gate valve is a valve with a valve plate moving along the vertical direction of the central line of a channel and is mainly used for cutting off media in a pipeline. The gate valve generally comprises a valve body, a valve seat, a valve rod, a valve plate, a sealing ring and the like.

The gate valves on the market are generally metal parts, and have the defects of high manufacturing cost, easy corrosion and limited use occasions, for example, the gate valves cannot be basically used in the industries of seawater, sewage treatment and chemical industry, and in order to make up for the vacancy of the market, the existing gate valves need to be optimized and upgraded to meet the requirements of the market.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gate valve that corrosion-resistant, be convenient for equipment, dismantlement are maintained.

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a gate valve is made by plastics, and it includes: valve body, valve gap, sealing member one, valve plate, valve rod, hand wheel and at least one sealing member two, the valve gap can dismantle and connect in the valve body top and form the valve pocket with the valve body cooperation, the valve gap seted up intercommunication valve pocket and outside shaft hole, sealing member one locate the junction of valve body and valve gap, the valve plate locate in the valve pocket and its top seted up a screw hole, the valve rod locate the top of valve plate, the valve rod include screw thread section and shaft part along the axis, the screw thread section stretch into screw thread hole and valve plate threaded connection, the shaft part stretch out the valve pocket from the shaft hole, the junction of screw thread end and shaft part step portion have, step portion and valve gap towards the terminal surface butt of one side of valve plate, the hand wheel can dismantle connect on the shaft part and keep away from the terminal surface butt of valve plate one side with the valve plate, the sealing member cover locate on the shaft part and with the shaft hole inner wall butt.

Further, the valve further comprises a gasket which is sleeved on the shaft section and abutted between the step part and the valve cover.

Furthermore, the valve also comprises a fixed seat which is connected with the outer wall of the valve body.

Further, the hand wheel cup joints on the shaft segment, shaft segment threaded connection have a nut, nut and hand wheel keep away from the terminal surface butt of valve gap one side.

Furthermore, the periphery wall of the shaft section is provided with at least one groove which extends along the circumferential direction to form a ring, and the second sealing element is arranged in the groove.

Preferably, the first sealing element and the second sealing element are both sealing rings. The internal thread of the threaded hole and the external thread of the threaded section are both double-thread threads, and the internal thread of the nut is a trapezoidal thread.

Preferably, the valve body is made of PVC or PP or PE or PVDF material.

Furthermore, the valve body is provided with a first socket and a second socket which are communicated with the valve cavity, a first valve seat which is in sealing fit with the end face of one side of the valve plate is arranged at the joint of the valve cavity and the first socket, and a second valve seat which is in sealing fit with the end face of the other side of the valve plate is arranged at the joint of the valve cavity and the second socket.

Preferably, the connection surface of the hand wheel and the shaft section is polygonal, the fixing seat is provided with a plurality of screw holes, and the valve body is in threaded connection with the valve cover.

Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that: first, the utility model discloses a gate valve is made by plastics, and it is for metal gate valve, low in manufacturing cost on the one hand, easily processing production, and on the other hand, plastics compare in the metal, and corrosion resistance is better, and plastics variety is numerous, can select suitable plastic material preparation as required the utility model discloses a gate valve, reinforcing selectivity. Secondly, the utility model discloses simple structure, its each part can be dismantled the connection, does benefit to dismantle the gate valve and maintains the maintenance to and the accessory is changed, reduces use cost. Finally, the utility model discloses a valve rod passes through step portion and the axial spacing shaft hole in the valve gap of hand wheel, and it has made things convenient for the installation of valve rod, does benefit to the packaging efficiency who improves the gate valve.

Drawings

Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a schematic bottom view of fig. 1.

Fig. 4 is a schematic view of the exploded structure of fig. 1.

Fig. 5 is a schematic view of the half-section structure of fig. 1.

Wherein: 1. the valve comprises a valve body, a valve cover 2, a sealing element I3, a sealing element I4, a valve plate 5, a valve rod 51, a thread section 52, a shaft section 53, a step section 54, a groove 6, a hand wheel 7, a sealing element II 8, a valve cavity 9, a shaft hole 10, a threaded hole 11, a gasket 12, a nut 13, a first bell and spigot 14, a second bell and spigot 15, a valve seat I16, a valve seat II 17, a fixed seat 18 and a screw hole.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1-5, the utility model discloses a gate valve, it is made by plastics, can fill the market vacancy of plastic gate valve, compensaties the not enough of metal gate valve, satisfies people's demand that uses the gate valve under specific condition, and the utility model discloses a gate valve low in manufacturing cost selects more.

The utility model discloses a gate valve includes: valve body 1, valve gap 2, valve plate 4, valve rod 5, hand wheel 6, sealing member one 3 and sealing member two 7, wherein, valve gap 2 can dismantle the top of connecting in valve body 1, the cooperation forms valve pocket 8 between valve gap 2 and the valve body 1, a screw hole 10 has been seted up at the top of valve gap 2, valve rod 5 is located the top of valve plate 4, valve rod 5 includes screw thread section 51 and shaft segment 52 along the axis, the junction of screw thread section 51 and shaft segment 52 has step portion 53, screw thread section 51 stretches into screw hole 10 and valve plate 4 threaded connection, shaft segment 52 stretches out valve pocket 8 from shaft hole 9, step portion 53 and the terminal surface butt of valve gap 2 towards one side of valve plate 4, hand wheel 6 can dismantle connect on this shaft segment 52 and keep away from the terminal surface butt of one side of valve plate 4 with valve gap 2, step portion 53 of hand wheel 6 cooperation valve rod 5 is with valve rod 5 axial spacing in shaft hole 9 of valve gap 2, need not install extra stop block and fix a position valve rod 5, do benefit to reduce cost, reduce the assembly steps, easy to assemble, and convenient to install, and improve assembly efficiency. The junction of valve gap 2 and valve body 1 is located to sealing member one 3, and sealing member two 7 covers and locates on the shaft part 52 of valve rod 5 and with the shaft hole 9 inner wall butt of valve gap 2 to guarantee the leakproofness of gate valve, avoid leaking. The utility model discloses simple structure wholly adopts detachable assembly structure, does benefit to and overhauls the gate valve and maintains, and the accessory of gate valve all can be changed, can reduce use cost.

The invention will be further described with reference to a certain preferred embodiment of the invention.

In this embodiment, the valve body 1 and the valve cover 2 are in threaded connection, the valve body 1 is provided with a first socket 13 and a second socket 14 which are communicated with the valve cavity 8, a first valve seat 15 which is in sealing fit with the end face of one side of the valve plate 4 is arranged at the joint of the valve cavity 8 and the first socket 13, and a second valve seat 16 which is in sealing fit with the end face of the other side of the valve plate 4 is arranged at the joint of the valve cavity 8 and the second socket 14. The bell and spigot of plastics can be connected with its tubular product that corresponds and use, also can directly use with tee bend, elbow class pipe connection, compare in metal gate valve's flange joint mode, the utility model discloses a gate valve's connected mode is more, and the commonality is stronger.

The valve body 1 can be made of PVC, PP, PE, PVDF and other acid and alkali resistant plastics, so that the valve body is suitable for the processes of seawater treatment, sewage treatment, chemical production and the like, the durability of the gate valve is improved, and the production is ensured to be carried out safely and smoothly.

The utility model discloses a non-rising stem gate valve, for reinforcing driven stability and precision between valve rod 5 and the valve plate 4, the external screw thread of the screw thread section 51 of valve rod 5 of this embodiment and the internal thread of the screw hole 10 of valve plate 4 are two thread, adopt single thread screw in comparison in metal gate valve, and the clearance between the screw thread section 51 outer wall of valve rod 5 of this embodiment and the screw hole 10 inner wall of valve plate 4 is littleer, is difficult to rock, does benefit to the sealing performance who improves the gate valve.

The annular recess 54 that extends along circumference has been seted up on the periphery wall of the shaft part 52 of the valve rod 5 of this embodiment, and the quantity of recess 54 is confirmed according to the quantity of two 7 sealing members, and two 7 sealing members are set in this recess 54, and this recess 54 plays spacing conduct, avoids two 7 sealing members to take place to run the position at valve rod 5 rotation in-process, influences the leakproofness of gate valve. The first sealing part 3 and the second sealing part 7 of this embodiment are sealing rings, and compared with a metal gate valve, the sealing rings can only adopt customized sealing gaskets due to structural characteristics, so that the manufacturing cost of the metal gate valve is improved, and the replacement and the repair are extremely inconvenient, the sealing rings of this embodiment are more selected, for example, the standard O-Ring can be adopted, so that the purchase cost is reduced, and the sealing rings are easily purchased and conveniently replaced and maintained.

In this embodiment, the stepped portion 53 may be a stepped surface, or may be a boss protruding outward from the outer wall of the valve stem 5. The shaft section 52 is fitted with a gasket 11 that is in contact with the stepped portion 53 and the bonnet 2. The gasket 11 can adopt a nylon gasket 11 with a standard specification and self-lubricating function so as to reduce the manufacturing cost of the plastic gate valve and prolong the service life of the rotation of the plastic gate valve.

This embodiment has still set up a fixing base 17 in valve body 1 bottom, and this fixing base 17 and valve body 1 integrated into one piece can make the gate valve stand on the plane, play the effect of supporting valve body 1. A plurality of screw holes have been seted up to this fixing base 17, and user's accessible screw hole fixes the gate valve on a certain plane, increases the firm nature of whole gate valve, reduces the gate valve to pipe-line system's weight pressure, avoids influencing whole pipe-line system's life-span. It will be appreciated that the mounting 17 may be located elsewhere on the outer wall of the valve body 1.

In this embodiment, the hand wheel 6 is sleeved on the shaft section 52, and the connection surface of the hand wheel 6 and the shaft section 52 is a polygon, so as to ensure that the valve rod 5 can be rotated through the hand wheel 6. The shaft section 52 is in threaded connection with a nut 12, the nut 12 and the hand wheel 6 are abutted against the end face of one side, far away from the valve cover 2, of the hand wheel 6 so as to limit the axial direction of the hand wheel 6, and the nut 12 can be a nut. The internal thread of nut 12 of this embodiment is trapezoidal thread, adopts many sets of screws, nut 12 to carry out the loaded down with trivial details nature that the lock fastened in comparison in metal gate valve, and the nut 12 and the shaft part 52 of this embodiment adopt trapezoidal thread fit, and interior external screw thread pastes tightly with the conical surface, and is difficult not hard up, and the fastening is better for the locking of gate valve or dismantle simple high-efficient.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A gate valve, made of plastic, comprising:

a valve body (1);

the valve cover (2) is detachably connected to the top of the valve body (1) and matched with the valve body (1) to form a valve cavity (8), and the valve cover (2) is provided with a shaft hole (9) for communicating the valve cavity (8) with the outside;

the first sealing element (3) is arranged at the joint of the valve body (1) and the valve cover (2);

the valve plate (4) is arranged in the valve cavity (8), and the top of the valve plate is provided with a threaded hole (10);

the valve rod (5) is arranged above the valve plate (4) and comprises a threaded section (51) and a shaft section (52) along the axis, the threaded section (51) extends into the threaded hole (10) to be in threaded connection with the valve plate (4), the shaft section (52) extends out of the valve cavity (8) from the shaft hole (9), a stepped part (53) is arranged at the joint of the threaded section (51) and the shaft section (52), and the stepped part (53) is abutted to the end face of one side, facing the valve plate (4), of the valve cover (2);

the hand wheel (6) is detachably connected to the shaft section (52) and is abutted against the end face of the valve cover (2) on the side far away from the valve plate (4);

and the second sealing element (7) is sleeved on the shaft section (52) and is abutted against the inner wall of the shaft hole (9).

2. The gate valve according to claim 1, further comprising a gasket (11) sleeved on the shaft section (52) and abutting between the step part (53) and the valve cover (2).

3. A gate valve according to claim 2, characterized in that it further comprises a fixing seat (17) attached to the outer wall of the valve body (1).

4. The gate valve of claim 3, wherein the hand wheel (6) is sleeved on the shaft section (52), the shaft section (52) is in threaded connection with a nut (12), and the nut (12) is abutted against the end face of the hand wheel (6) on the side far away from the valve cover (2).

5. A gate valve according to claim 4, characterized in that the outer peripheral wall of the shaft section (52) is provided with at least one circumferentially extending annular groove (54), and the second sealing element (7) is arranged in the groove (54).

6. A gate valve according to claim 5, characterized in that both the first seal (3) and the second seal (7) are sealing rings.

7. A gate valve according to claim 6, characterized in that the internal thread of the threaded bore (10) and the external thread of the threaded section (51) are double thread threads and the internal thread of the nut (12) is a trapezoidal thread.

8. A gate valve according to claim 7, characterized in that the valve body (1) is made of PVC or PP or PE or PVDF material.

9. A gate valve according to claim 8, characterized in that the valve body (1) is provided with a first socket (13) and a second socket (14) which are communicated with the valve cavity (8), the joint of the valve cavity (8) and the first socket (13) is provided with a first valve seat (15) which is in sealing fit with one side end surface of the valve plate (4), and the joint of the valve cavity (8) and the second socket (14) is provided with a second valve seat (16) which is in sealing fit with the other side end surface of the valve plate (4).

10. The gate valve according to claim 9, characterized in that the connection surface of the hand wheel (6) and the shaft section (52) is polygonal, the fixing seat (17) is provided with a plurality of screw holes (18), and the valve body (1) and the valve cover (2) are in threaded connection.