CN211738110U

CN211738110U - Double helix line switching-over structure of multichannel plunger valve

Info

Publication number: CN211738110U
Application number: CN201922063745.3U
Authority: CN
Inventors: 吴小康; 杨雪华; 虞戈; 钱彬; 柯松林; 干瑞彬
Original assignee: CNNC Sufa Technology Industry Co Ltd
Current assignee: China Petroleum and Chemical Corp; Sinopec Engineering Inc; CNNC Sufa Technology Industry Co Ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-10-23
Anticipated expiration: 2029-11-26

Abstract

The utility model belongs to the industrial valve field relates to a two spiral line switching-over structures of multichannel plunger valve, wherein, including the valve body, set up the valve rod in the valve body, the top of valve rod sets up the actuating mechanism with valve rod fixed connection, and the lower extreme of valve rod sets up the switching-over subassembly, and the switching-over subassembly sets up in the valve body. This neotype effect is: the device can ensure that in the devices with harsh working conditions such as slurry bed residual oil hydrorefining, coal chemical industry and the like, the valve is not prone to generating medium flowing dead zones due to working conditions and plunger structures, so that media are coked and cannot flow, and the phenomena of galling on the surface of the plunger and blocking of the valve, which cause valve failure and device shutdown, cause economic loss.

Description

Double helix line switching-over structure of multichannel plunger valve

Technical Field

The utility model discloses a double helix line switching-over structure of multichannel plunger valve belongs to the industrial valve field, concretely relates to.

Background

The multi-channel plunger valve is generally used in devices with harsh working conditions, such as residual oil hydrorefining, coal chemical industry and the like. The medium flowing by the devices is a slurry medium containing highly dispersed fine solids, has extremely high deposition and coking tendency, is not allowed to have a flow dead zone in a channel, is rich in hydrogen and hydrogen sulfide, is inflammable and explosive, and has high danger. A special double-helix reversing structure is developed, so that a medium in a valve cavity is extruded out of a plunger in the operation process, the plunger rotates under the guidance of a track when the plunger is closed, the valve cavity formed after rotation has no dead angle, the function of preventing slurry deposition is realized, the impact on a sealing surface is effectively reduced, the risks of medium deposition and coking can be solved, and the service life of a valve internal part is prolonged.

SUMMERY OF THE UTILITY MODEL

The novel double helix reversing structure of the multi-channel plunger valve is designed in a device with harsh working conditions such as slurry bed residual oil hydrorefining, coal chemical industry and the like. The normal use of the valve is ensured, and the valve blockage phenomenon caused by plunger surface galling and medium coking due to working conditions and plunger structure problems is avoided, so that the valve is out of work, the device is shut down, and economic loss is caused.

This is novel to realize like this: the utility model provides a two spirals of multichannel plunger valve structure of switching-over, wherein, includes the valve body, sets up the valve rod in the valve body, the top of valve rod set up with valve rod fixed connection's actuating mechanism, the lower extreme of valve rod sets up the switching-over subassembly, the switching-over subassembly sets up in the valve body.

According to the double-helix reversing structure of the multi-channel plunger valve, the top end of the valve rod is fixedly connected with the driving mechanism through the valve rod nut.

The double-helix reversing structure of the multi-channel plunger valve comprises a reversing shaft and a plunger, wherein the reversing shaft is connected with the lower end of a valve rod, and the plunger is arranged below the reversing shaft.

According to the double-helix reversing structure of the multi-channel plunger valve, the reversing shaft and the outer surface of the valve rod are provided with the guide parts.

According to the double-helix reversing structure of the multi-channel plunger valve, the double-helix guiding structure is arranged on the guiding piece, and the reversing shaft drives the plunger to move along the double-helix guiding structure in the moving process, so that the plunger rotates in the up-and-down moving process.

The double helix reversing structure of the multi-channel plunger valve is characterized in that the plunger rotates in the process of moving up and down by 90 degrees or 180 degrees.

According to the double-helix reversing structure of the multi-channel plunger valve, the head of the plunger is designed in an arc shape so as to ensure that the plunger is synchronous with a valve body flow passage at the valve closing position and the valve opening position.

According to the double-helix reversing structure of the multi-channel plunger valve, the body type sealing surface is arranged in the cavity of the valve body, and hard alloy is welded on the sealing surface.

According to the double-helix reversing structure of the multi-channel plunger valve, the plunger is provided with the conical surface sealing surface, the hard alloy is welded on the sealing surface and the head of the plunger in a build-up mode, and the hard alloy is sprayed on the outer circle surface of the plunger.

The double-helix reversing structure of the multi-channel plunger valve is characterized in that the plunger head is arc-shaped.

The double-helix reversing structure of the multi-channel plunger valve comprises a plunger, a valve body and a valve seat, wherein the plunger is a hollow part.

This neotype effect is: the device can ensure that in the devices with harsh working conditions such as slurry bed residual oil hydrorefining, coal chemical industry and the like, the valve is not prone to generating medium flowing dead zones due to working conditions and plunger structures, so that media are coked and cannot flow, and the phenomena of galling on the surface of the plunger and blocking of the valve, which cause valve failure and device shutdown, cause economic loss.

Drawings

Fig. 1 is a schematic closing position diagram of a double-spiral reversing structure of a multi-channel plunger valve provided by the present invention;

fig. 2 is a schematic view of an opening position of a double-spiral reversing structure of the multi-channel plunger valve provided by the present invention;

FIG. 3 is a schematic view of a plunger construction;

FIG. 4 is a schematic view of the guide construction;

fig. 5 is a schematic perspective view of fig. 4.

In the figure: 1. the valve comprises a valve body, a plunger 2, a reversing shaft 3, a guide 4, a valve rod 5, a valve rod nut 6 and a driving mechanism 7.

Detailed Description

A double-helix reversing structure of a multi-channel plunger valve mainly comprises a valve body 1, a plunger 2, a reversing shaft 3, a guide part 4, a valve rod 5, a valve rod nut 6 and a driving mechanism 7, wherein the valve body 1 is of a nonlinear flow channel structure and is a hollow discontinuous cylindrical part, flanges are arranged at two ends of the valve body and are connected with a pipeline on a reaction device, and a body-type sealing surface is designed in a flow channel. A plunger 2 is arranged in a cavity of the valve body, the head of the piston is provided with a sealing surface, and when the valve is closed, the sealing surface of the plunger is tightly attached to the sealing surface of the valve body, so that the sealing effect is achieved; a hand wheel on the driving mechanism 7 rotates to drive the valve rod nut 6 to rotate, the valve rod nut 6 is in threaded engagement with the valve rod 5, and the valve rod nut 6 rotates to drive the valve rod 5 to move up and down, so that the plunger 2 is driven to move up and down to open and close the valve; the guide member 4 is provided with a double-helix guide groove structure, and is connected with the plunger 2 through the reversing shaft 3, so that the plunger 2 moves along a set track of the guide member 4 in the process of moving up and down to achieve the reversing purpose, as shown in a schematic closing position diagram of a double-helix reversing structure of a multi-channel plunger valve in the attached figure 1 and a schematic opening position diagram of a double-helix reversing structure of a multi-channel plunger valve in the attached figure 2.

A body type sealing surface is arranged in a cavity of the valve body 1, and hard alloy is welded on the sealing surface in a surfacing mode, so that the effects of erosion resistance, corrosion resistance and wear resistance are achieved.

The plunger 2 is arranged in the cavity of the valve body 1, the plunger 2 is tightly attached to the inner side wall of the valve body 1 and is coaxially arranged with the plunger, and the whole-course guiding effect of the plunger 2 in the moving process is achieved.

The plunger 2 is provided with a conical surface sealing surface, hard alloy is built up on the sealing surface and the head of the plunger 2, and the hard alloy is sprayed on the outer circle surface of the plunger 2, so that the effects of erosion resistance, corrosion resistance and wear resistance are achieved.

The head of the plunger 2 is designed in an arc shape so as to ensure that the plunger is synchronous with the flow channel of the valve body 1 at the closing position and the opening position of the valve, the medium flows smoothly without flowing dead zones, and the phenomena of valve blocking and the like caused by coking phenomenon due to the fact that the medium flows smoothly in the valve are prevented.

Plunger 2 is the cavity design, prevents because of plunger 2 is overweight, when arousing plunger 2 and valve body 1, valve rod 5 coordinated motion, plunger 2 nappes and warp to reach the unable laminating of the sealed face of valve body 1 and the sealed face of plunger 2.

The reversing shaft 3 is connected with the plunger 2 and the valve rod 5 at the same time, and the valve rod 5 and the plunger 2 are guaranteed to move synchronously.

The guide piece 4 is provided with double spiral lines, the reversing shaft 3 moves along the structure in the moving process, and the 180-degree rotation is achieved simultaneously in the up-and-down moving process, so that the plunger 2 can also achieve the purpose of 180-degree rotation.

The reversing angle is 180 degrees or 90 degrees, which is determined according to the flow passage design of the valve body 1.

The functions of each part are explained as follows:

1. the valve body 1 guides the plunger 2 in the whole opening and closing process, and prevents the plunger 2 from galling and deforming, unsmooth movement and sealing failure when the plunger 2 moves in cooperation with the valve body 1, the reversing shaft 3 and the valve rod 5.

2. The guide member 4 is provided with a double helix structure, which provides a track for the reversing shaft 3 to move up and down and rotate 180 degrees at the same time.

3. The reversing shaft 3 is simultaneously connected with the plunger 2 and the valve rod 5, and the reversing shaft 3 drives the plunger 2 to do vertical rotary motion while doing vertical rotary motion on the double helix track of the guide piece 4, thereby achieving the purpose of rotary reversing of the plunger 2.

4. The plunger 2 is provided with a guide surface, and the guide surface is sprayed with hard alloy to enhance the wear resistance between the plunger 2 and the valve body 1 and between the plunger and the medium.

Claims

1. The utility model provides a two spiral line switching-over structures of multichannel plunger valve which characterized in that: including valve body (1), set up valve rod (5) in valve body (1), the top of valve rod (5) sets up actuating mechanism (7) with valve rod (5) fixed connection, and the lower extreme of valve rod (5) sets up the switching-over subassembly, and the switching-over subassembly sets up in valve body (1).

2. A double helix reversing arrangement for a multiple channel plug valve according to claim 1, wherein: the top end of the valve rod (5) is fixedly connected with a driving mechanism (7) through a valve rod nut (6).

3. A double helix reversing arrangement for a multiple channel plug valve according to claim 2, wherein: the reversing assembly comprises a reversing shaft (3) and a plunger (2), wherein the reversing shaft (3) is connected with the lower end of the valve rod (5), and the plunger (2) is arranged below the reversing shaft (3).

4. A double helix reversing arrangement for a multiple channel plug valve according to claim 3, wherein: the outer surfaces of the reversing shaft (3) and the valve rod (5) are also provided with a guide piece (4).

5. A double helix reversing arrangement for a multiple channel plug valve according to claim 4, wherein: the guide piece (4) is provided with a double-helix guide structure, and the reversing shaft (3) drives the plunger (2) to move along the double-helix guide structure in the moving process, so that the plunger (2) rotates in the up-and-down moving process.

6. A double helix reversing arrangement for a multiple channel plug valve according to claim 5, wherein: the plunger (2) rotates in the process of moving up and down, and the rotating angle is 90 degrees or 180 degrees.

7. A double helix reversing arrangement for a multiple channel plug valve according to claim 5, wherein: the head of the plunger (2) is designed in an arc shape so as to ensure that the plunger (2) is synchronous with the flow channel of the valve body (1) at the closing position and the opening position of the valve.

8. A double helix reversing arrangement for a multiple channel plug valve according to claim 7, wherein: a body type sealing surface is arranged in a cavity of the valve body (1), and hard alloy is welded on the sealing surface in an overlaying mode.

9. A double helix reversing arrangement for a multiple channel plug valve according to claim 8, wherein: the plunger (2) is provided with a conical surface sealing surface, hard alloy is built up on the sealing surface and the head of the plunger (2), and the hard alloy is sprayed on the surface of the excircle of the plunger (2).

10. A double helix reversing arrangement for a multiple channel plug valve according to claim 9, wherein: the head of the plunger (2) is arc-shaped.

11. A double helix reversing arrangement for a multiple channel plug valve according to claim 10, wherein: the plunger (2) is a hollow part.