CN216045550U

CN216045550U - Novel runner sealing surface wedge gate valve

Info

Publication number: CN216045550U
Application number: CN202120702185.6U
Authority: CN
Inventors: 黄成元; 华晓勇; 周世凯
Original assignee: Jiangsu Wanheng Casting Industry Co ltd
Current assignee: Jiangsu Wanheng New Material Technology Co.,Ltd.
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2022-03-15
Anticipated expiration: 2031-04-07

Abstract

The utility model relates to the valve manufacturing industry, focuses on innovating the manufacture of a flashboard and a runner sealing surface of a wedge gate valve, and provides a novel wedge gate valve of a runner sealing surface.

Description

Novel runner sealing surface wedge gate valve

Technical Field

The utility model relates to the valve manufacturing industry, and aims to innovatively manufacture a wedge type gate valve flashboard and a runner sealing surface.

Background

The valve has extremely wide application, and is one of indispensable industrial pipeline accessories and equipment in national economy; the gate valve is the most common one of all valves and is the preferred valve type of a common main branch pipeline; the valve body sealing surface of the wedge gate valve mostly adopts a hard sealing surface formed by overlaying welding, can be used for a high-temperature valve, has straight and smooth flow channel, small flow resistance and long service life, and is widely applied to opening and closing devices for connecting or cutting off media in pipelines in industries such as petroleum, chemical engineering and the like.

The wedge angle of the valve seat of the wedge gate valve is highly matched with the wedge angle of the flashboard during assembly due to the existence of the wedge angle, so that the two wedge angles in sealing fit are required to have higher angle precision and symmetry precision during processing, especially the distance dimensional tolerance of the left valve seat and the right valve seat is difficult to measure, and the symmetry degree of the two valve seat wedge angles centering on the center of the flange is difficult to guarantee; in the prior art, the gate plate is used as a key component of the wedge gate valve, and the matching with the sealing surface of the valve seat in the manufacturing process is single matching no matter the gate plate is rigid or elastic, so that the interchangeability assembly cannot be realized, and even the elastic gate plate can only generate a small amount of elastic deformation to compensate for the processing error generated in the angle processing process of the sealing surface, so that the difficulty is increased for the processing, grinding and subsequent maintenance of the sealing surface comprising the gate plate, the valve body and the valve seat.

Disclosure of Invention

The utility model relates to the valve manufacturing industry, and provides a manufacturing method with interchangeable assembly for a runner sealing surface of a wedge gate valve.

Technical scheme of utility model

The embodiment of the utility model is solved by the following technologies: the wedge gate valve is characterized in that a runner sealing surface capable of being assembled in an interchangeable manner is designed according to the working condition requirement of the wedge gate valve, the manufacturing and the assembling of the runner sealing surface are facilitated, the wedge gate valve structurally comprises a valve body, a detachable valve seat assembly and a combined wedge gate plate assembly, the gate plate assembly is formed by processing sectional materials, and the blank price is 1/3 of an original casting. The gate plate assembly consists of a left sealing plate, a right sealing plate and a spherical base, wherein the left sealing plate and the right sealing plate are completely symmetrical and have no wedge angle, the spherical base is provided with a single-side wedge angle, the sealing plates and the spherical base are matched by convex and concave spherical surfaces with the same radius, and when the gate plate assembly supported by spherical positioning closes a flow channel, the two-dimensional angle manufacturing error of an assembled surfacing sealing surface of the valve seat relative to the axis of the flow channel can be automatically compensated. The spherical base consists of an upper spherical base and a lower spherical base which are connected with a screw through a positioning pin and a base, and the left and right concave spherical surfaces of the spherical base are processed after being assembled into a whole; the middle parts of the left and right sealing plates are welded or in threaded connection with a tension spring seat, a tension spring screw is matched on the tension spring seat, and the tension spring is connected with the left and right sealing plates. The middle part of the flashboard assembly is provided with a blocking ring and is matched with a blocking set screw to fasten the middle part of the tension spring so as to isolate the mutual interference of the left sealing board and the right sealing board caused by the tension spring. The gate plate guide groove is arranged on an independent guide groove block and is connected to the assembly of the upper spherical base and the lower spherical base through guide groove block screws so as to enhance the connection of the upper spherical base and the lower spherical base and facilitate the clamping of the numerical control turning spherical surface; the outer circumference of the valve seat is provided with external threads which are connected with internal threads in a valve seat hole of the valve body with a single-side wedge angle, and the valve seat and the valve body are sealed by a graphite gasket wound on a rectangular section. And valve seat fastening screws which are uniformly distributed on the inner side of the valve seat close to the flow passage hole are locked after the threads are screwed down. The winding graphite gasket is provided with three thicknesses of 5mm, 4mm and 3mm to adapt to the distance error and the symmetry error when the left and right valve seat holes of the valve body are machined. The distance tolerance of the left valve seat hole and the right valve seat hole of the valve body is reduced to +/-2 mm, and the wedge angle tolerance is reduced to +/-2 degrees, and the symmetry tolerance is reduced to 3 mm.

Drawings

Fig. 1 is a flow passage (gate plate) seal assembly, fig. 1 detail: 1. the valve comprises a valve body, 2 parts of a valve seat assembly, 3 parts of a flashboard assembly, 4 parts of a valve rod and theta parts of a single-side wedge angle.

FIG. 2 is an overall view of the valve seat, with FIG. 2 detail: 201. the method comprises the following steps of (1) welding a valve seat, (202) welding a valve seat set screw, (203) winding a graphite gasket in a rectangular mode, and (T) (welding a valve seat and a valve body) welding a sealing surface of the valve seat.

FIG. 3 is a main sectional view of the gate assembly, with the parts of FIG. 3 being detailed: 301. the device comprises an upper spherical base, 303, a blocking ring, 304, a blocking ring set screw, 307, a tension spring, 308, a lower spherical base, 309, a base connecting screw, 310, a guide groove block, 311, a guide groove block screw, 312, a positioning pin and G, a gate plate guide groove.

FIG. 4 is a side cross-sectional view of the gate assembly, with the parts of FIG. 4 detailed: 301. the sealing structure comprises an upper spherical base, 302 a sealing plate, 303 a blocking ring, 304 a blocking ring set screw, 305 a tension spring seat, 306 a tension spring screw, 307 a tension spring, 308 a lower spherical base, an S-positioning spherical surface and a 3-A flashboard overlaying sealing surface.

FIG. 5 is a top view of the gate assembly, with the parts of FIG. 5 detailed: 309. the base is connected with the screw, 312, the locating pin, G, the flashboard guide way.

The utility model has the positive effects that:

the manufacturing method with interchange assembly is provided for the runner sealing surface of the wedge gate valve, the distance tolerance, the wedge angle tolerance and the symmetry tolerance requirements of the left valve seat hole and the right valve seat hole of the valve body are greatly reduced, the distance tolerance is reduced to +/-2 mm in actual production, the wedge angle tolerance is reduced to +/-2 degrees, the symmetry tolerance is reduced to 3mm, the gate plate assembly is formed by processing a section bar, the blank price is 1/3 of an original casting, adaptation links such as grinding of the sealing surface in assembly and the like are omitted, the assembly is simplified, the sealing performance of the runner is improved, the wedge phenomenon in opening and closing of the gate plate is avoided, and meanwhile, the subsequent maintenance and the repair of the valve are facilitated.

Detailed Description

The main characteristic of the utility model is that the interchangeable assembly of the sealing surface of the runner is made and assembled according to the working condition requirement of the wedge gate valve and the preferable sealing surface of the runner, the structure of the utility model is composed of a valve body 1, a detachable valve seat assembly 2 and a combined wedge gate plate assembly 3, as the preferable option, the gate plate assembly 3 is processed by section bars, the price of the blank is 1/3 of the original casting, the cost is reduced, and the utility model has higher economy.

According to the spherical positioning principle, when a combined wedge type gate plate assembly 3 positioned and supported by a spherical surface S is closed, the gate plate surfacing sealing surface 3-A can be adaptive to a valve seat surfacing sealing surface 2-A, the gate plate assembly 3 is composed of a left sealing plate 302 and a right sealing plate 302 which are completely symmetrical and have no wedge angle and a spherical base 301+308 with a single-side wedge angle theta, the sealing plates 302 and the spherical base 301+308 are matched by convex and concave spherical surfaces S with the same radius, when a flow channel is closed by the gate plate assembly (3) positioned and supported by the spherical surface S, the two-dimensional angle manufacturing error of the assembled valve seat surfacing sealing surface (2-A) relative to the axis of the flow channel can be automatically compensated, and the hard sealing surface with surfacing is separated from the wedge angle, so that the manufacturing is more convenient. The

spherical bases

301 and 308 are composed of an upper spherical base 301 and a lower spherical base 308 through a positioning pin 312 and a base connecting screw 309, and the left and right concave spherical surfaces S are machined through numerical control turning after being assembled into a whole, so that the positioning and the stress of the spherical surfaces S can be further ensured. The middle parts of the left and right sealing plates 302 are welded or screwed with tension spring seats 305, which are provided with tension spring screws 306, and tension springs 307 with moderate stiffness are selected by calculation to connect the left and right sealing plates 302. The shutter assembly 3 has a blocking ring 303 in the middle, and a blocking set screw 304 is provided to fasten the middle of the tension spring 307, so as to isolate the interference between the left and right sealing plates 302 caused by the tension spring 307. The gate plate guide grooves G on two sides are arranged on the independent guide groove blocks 310 and are connected to the assembly of the upper spherical base 301 and the lower spherical base 308 through guide groove block screws 311, so that the connection rigidity of the upper spherical base 301 and the lower spherical base 308 is enhanced, and the clamping during numerical control turning of the spherical surface S is facilitated.

The valve seat 201 with the surfacing hard sealing surface also has interchangeability, the outer circumferential surface of the valve seat 201 is provided with an external thread T which is connected with an internal thread T in a valve seat hole of the valve body 1 with a single-side wedge angle theta, and the valve seat 201 and the valve body 1 are sealed by a graphite gasket 203 wound with a rectangular section. The valve seat 201 is close to the inner side of the flow passage hole and is provided with valve seat set screws 202 which are uniformly distributed and locked after the screw thread T is screwed. The winding graphite gasket 203 is provided with three thicknesses of 5mm, 4mm and 3mm to adapt to the distance error and the symmetry error when the left and right valve seat holes of the valve body 1 are processed. The distance tolerance of the left valve seat hole and the right valve seat hole of the valve body is reduced to +/-2 mm, and the wedge angle tolerance is reduced to +/-2 degrees, and the symmetry tolerance is reduced to 3 mm. The top of the upper spherical base 301 is provided with a reverse T-shaped groove which is matched with the valve rod 4, and the valve is opened and closed when the valve rod 4 moves up and down by the gate plate assembly 3.

Claims

1. The utility model provides a novel sealed face wedge gate valve of runner, its characterized in that: the wedge type gate valve structurally comprises a valve body (1), a detachable valve seat assembly (2) and a combined wedge type gate plate assembly (3), wherein the wedge type gate plate assembly (3) is formed by processing sectional materials.

2. The novel gate valve with the wedge-shaped runner sealing surface as claimed in claim 1, wherein: the gate plate assembly (3) consists of a left sealing plate (302), a right sealing plate (302) and a spherical base (301+308) which are completely symmetrical and have no wedge angle, wherein the spherical base (301+308) has a single-side wedge angle (theta), the sealing plates (302) and the spherical base (301+308) are matched by convex and concave spherical surfaces (S) with the same radius, and when the gate plate assembly (3) positioned and supported by the spherical surfaces (S) closes a flow channel, the two-dimensional angle manufacturing error of an assembled valve seat surfacing sealing surface (2-A) relative to the axis of the flow channel can be automatically compensated.

3. The novel gate valve with a wedge-shaped runner sealing surface as claimed in claim 1 or 2, wherein: the spherical base (301+308) is composed of an upper spherical base (301) and a lower spherical base (308) through a positioning pin (312) and a base connecting screw (309).

4. The novel gate valve with a wedge-shaped runner sealing surface as claimed in claim 1 or 2, wherein: the middle parts of the left and right sealing plates (302) are welded or in threaded connection with a tension spring seat (305) which is provided with a tension spring screw (306), and a tension spring (307) is connected with the left and right sealing plates (302).

5. The novel gate valve with a wedge-shaped runner sealing surface as claimed in claim 1 or 2, wherein: the middle part of the flashboard assembly (3) is provided with a blocking ring (303) which is matched with a blocking set screw (304) to fasten the middle part of the tension spring (307) so as to isolate the mutual interference of the left sealing board (302) and the right sealing board (302) caused by the tension spring (307).

6. The novel gate valve with a wedge-shaped runner sealing surface as claimed in claim 1 or 2, wherein: the shutter guide groove (G) is arranged on a separate guide groove block (310) and is connected to the combination of the upper spherical base (301) and the lower spherical base (308) through a guide groove block screw (311).

7. The novel gate valve with the wedge-shaped runner sealing surface as claimed in claim 1, wherein: the outer circumference of the valve seat (201) is provided with an external thread (T) which is connected with an internal thread (T) in a valve seat hole of the valve body (1) with a single-side wedge angle (theta), and the valve seat (201) and the valve body (1) are sealed by a graphite gasket (203) wound with a rectangular section.

8. The novel gate valve with a wedge-shaped runner sealing surface as claimed in claim 1 or 7, wherein: valve seat (201) are close to the inside of runner hole and have valve seat holding screw (202) of equipartition and lock after screw thread (T) are screwed up.

9. The novel gate valve with a wedge-shaped runner sealing surface as claimed in claim 1 or 7, wherein: the winding graphite gasket (203) is provided with three thicknesses of 5mm, 4mm and 3mm to adapt to the distance error and the symmetry error when the left and right valve seat holes of the valve body (1) are processed.