Replaceable metal sealing valve seat structure

Abstract

The utility model discloses a replaceable metal sealing valve seat structure which comprises a valve body, a gate plate and a valve seat, the valve seat is fixedly connected to the side, close to the gate plate, of the valve body, and a first welding sealing face is arranged at the connecting position of the valve body and the side face of the valve seat. The side faces, close to each other, of the gate plate and the valve seat are fixedly connected with a second welding sealing face and a third welding sealing face respectively. Structures of a valve seat and a valve body of an existing metal sealing gate valve are improved, the valve seat and the valve body are arranged to be two parts which can be disassembled and assembled, after a welding sealing face of the valve seat is damaged, the valve seat can be disassembled from the valve body to be replaced with a new valve body for continuous use, the whole valve body does not need to be replaced, cost is greatly saved, and production efficiency is improved. The valve body is simple and reasonable in structure, easy and convenient to replace, low in manufacturing cost and high in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve, concretely relates to a replaceable metal seal valve seat structure. BACKGROUND

[0002] The gate valve is the most commonly used cut-off valve in industrial pipeline. The valve has the advantages of small flow resistance, wide application medium range, simple structure and the like, and is widely used in various fields. However, the metal seal gate valve seat and the valve body are often connected by sealing welding, but it is found in actual use that the welded valve seat cannot be replaced after wear, and the entire valve body is scrapped due to the reason that the valve seat cannot be disassembled, so that the service life of the valve body is greatly reduced, and the use cost is increased. Therefore, we provide a replaceable metal seal valve seat structure. SUMMARY

[0003] The utility model wants to solve the technical problem to provide a replaceable metal seal valve seat structure, solves the current metal seal gate valve seat and the valve body often are connected by sealing welding, but it is found in actual use that the welded valve seat cannot be replaced after wear, and the entire valve body is scrapped due to the reason that the valve seat cannot be disassembled, so that the service life of the valve body is greatly reduced, and the use cost problem is increased.

[0004] To solve the above technical problem, the utility model provides the following technical scheme: a replaceable metal seal valve seat structure, including valve body, gate and valve seat, the valve body is fixedly connected with valve seat on the side close to gate, the valve body and valve seat side surface junctions are equipped with welding sealing surface no.

[0005] On the basis of the above scheme, the valve seat and the valve body are connected by threads.

[0006] On the basis of the above scheme, the valve seat side surface and welding sealing surface no. are tightly sealed and matched.

[0007] On the basis of the above scheme, a plurality of open grooves are evenly arranged on the inner hole of the valve seat.

[0008] On the basis of the above scheme, welding sealing surface no. and welding sealing surface no. 3 are tightly sealed and matched.

[0009] The utility model discloses a replaceable metal seal valve seat structure, which has the beneficial effects that compared with the prior art: the structure of the existing metal seal gate valve seat and valve body is improved, and they are set as two parts that can be disassembled and assembled, after the welding sealing surface of the valve seat is damaged, the valve seat can be disassembled from the valve body for replacement and continuous use, the entire valve body does not need to be replaced, cost is greatly saved, and the service life of the valve body is increased. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 It is a structure schematic view of the utility model discloses a replaceable metal seal valve seat structure.

[0011] Fig. 2 It is a partial enlarged view of the utility model discloses a replaceable metal seal valve seat structure.

[0012] In the drawing, the reference signs are: 1-valve body, 101-welding sealing surface one, 2-shutter, 201-welding sealing surface two, 3-valve seat, 301-opening groove, 302-welding sealing surface three. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below by combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0014] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0015] REFERENCE Figs. 1-2 It can be known that: a replaceable metal seal valve seat structure, including valve body 1, shutter 2 and valve seat 3, the valve body 1 is fixedly connected with valve seat 3 on the side close to shutter 2, the valve body 1 and valve seat 3 side connection are equipped with welding sealing surface one 101, welding sealing surface two 201 and welding sealing surface three 302 are respectively fixedly connected on the side of shutter 2 and valve seat 3 and each other, shutter 2 is the existing structure of gate valve, the structure of valve body 1 and valve seat 3 is improved in the patent.

[0016] The valve seat 3 is connected with the valve body 1 through threads, and the damaged valve seat 3 can be replaced through the threaded connection, so that the valve seat 3 is convenient to disassemble and install; the side surface of the valve seat 3 is in tight sealing cooperation with the welding sealing surface one 101, and the design can still achieve the sealing effect through the tight sealing after the valve seat 3 is replaced; a plurality of open grooves 301 are uniformly arranged on the inner hole of the valve seat 3, and the plurality of open grooves 301 can facilitate the disassembly and installation of the valve seat 3 through tools; the welding sealing surface two 201 and the welding sealing surface three 302 are in tight sealing cooperation, and the sealing cooperation of the welding sealing surfaces can ensure long-term use and is not easy to damage the sealing effect.

[0017] The utility model discloses a principle and advantage: a kind of replaceable metal seal valve seat structure, adopt new structure, the structure of existing metal seal gate valve valve seat 3 and valve body 1 is improved, they are set into two parts of disassembly and installation, after the welding sealing surface of valve seat 3 is damaged, using tool through open groove 301, valve seat 3 can be disassembled from valve body 1 and replaced new continue to use, without replacing entire valve body 1, greatly save cost, using this structure makes that valve maintenance replaces valve seat 3 more convenient and fast, thereby can reduce stoppage loss, both reduce maintenance cost and improve valve service life, the utility model discloses simple and reasonable structure, replace simple and convenient, manufacturing cost is low, it is suitable for promotion and use.

[0018] The above only is the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A replaceable metal-to-metal sealing valve seat structure comprising a valve body (1), a gate (2) and a valve seat (3), characterized in that: The valve body (1) is fixedly connected with a valve seat (3) on one side close to the gate plate (2), a welding sealing surface one (101) is arranged at the side surface connection between the valve body (1) and the valve seat (3), and the gate plate (2) and the valve seat (3) are fixedly connected with a welding sealing surface two (201) and a welding sealing surface three (302) respectively on the side surfaces close to each other.

2. A replaceable metal seated valve seat structure according to claim 1 wherein, The valve seat (3) is connected with the valve body (1) through threads.

3. A replaceable metal seated valve seat structure according to claim 1 wherein, The side surface of the valve seat (3) is in sealing cooperation with the welding sealing surface one (101).

4. A replaceable metal seated valve seat structure according to claim 1 wherein, A plurality of open grooves (301) are evenly arranged on the inner hole of the valve seat (3).

5. A replaceable metal seated valve seat structure according to claim 1 wherein, The welding sealing surface two (201) and the welding sealing surface three (302) are in sealing cooperation.

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