CN211117767U

CN211117767U - Multi-way valve structure of PTA device

Info

Publication number: CN211117767U
Application number: CN201922484359.1U
Authority: CN
Inventors: 任永祥
Original assignee: Sichuan Energy Investment Chemical New Materials Co ltd
Current assignee: Sichuan Energy Investment Chemical New Materials Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-28
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a multiple unit valve structure of PTA device, the multiple unit valve includes valve rod, valve barrel, disk seat and drives the actuating mechanism of valve rod, valve rod and valve barrel transversely set up in the disk seat, it has the centre bore to bore on the valve rod, the centre bore is seted up along its length direction from the valve rod afterbody, and does not run through whole valve rod, the surface of valve rod is spouted and is welded there is the tungsten carbide strengthening layer. Compared with the prior art, the utility model greatly prolongs the service life of the large valve such as the PTA device, and drills a central hole at the tail part of the valve rod, thereby reducing the weight of the valve rod, reducing the friction force between the valve rod and the valve sleeve, and greatly reducing the abrasion loss between the valve rod and the valve sleeve; a tungsten carbide strengthening layer is spray-welded on the outer surface of the valve rod for medium separation, so that the problem that the valve rod and the valve sleeve are easy to adhere due to the same material is solved; meanwhile, the surface hardness of the valve rod is increased, and the wear resistance is improved.

Description

Multi-way valve structure of PTA device

Technical Field

The utility model relates to a large-scale valve field especially relates to a multiple unit valve structure of PTA device.

Background

The multi-way valve system is used for a high-pressure feeding pump of a dissolving reactor in a refining workshop of the PTA device, belongs to large-scale valve equipment, and the condition that a plurality of valve heads are not tightly closed frequently occurs in the operation of the equipment, so that the PTA production device is forced to be shut down in a whole line for maintenance, and great economic loss is caused to a company. The disassembly inspection shows that the abrasion between the valve sleeve and the valve rod is serious, the surfaces of the two parts of the valve rod and the valve sleeve are seriously damaged, and the sealing plate of the valve is seriously damaged.

Through observation and analysis, the causes of valve damage are mainly the following:

1. the valve rod and the valve sleeve are made of 316L materials, and the materials are the same, so that the valve rod and the valve seat are easy to adhere when moving relatively, and the equipment is damaged by pulling;

2. the valve body is a large pipe valve and is transversely arranged, however, a valve rod of the device is solid, and the weight of the valve rod is too heavy, so that the friction force is too large when the valve rod and a valve seat move relatively, the device is pulled, and particularly the lower end of the inner side of a valve sleeve is arranged.

3. Some structures may not be chamfered or may not be chamfered in place during the device manufacturing process.

In view of the above situation, the problem cannot be solved fundamentally by adopting simple repair measures such as polishing, repair welding and the like, and the problem can be solved only by reasonable technical improvement, so that the long-term periodic use of the valve can be ensured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a solve above-mentioned problem, improve the multiple unit valve structure of the life of this kind of large-scale valve of multiple unit valve of PTA device greatly.

In order to realize the purpose, the utility model discloses a technical scheme is: the utility model provides a PTA device's multiple unit valve structure, the multiple unit valve includes valve rod, valve barrel, disk seat and drives the actuating mechanism of valve rod, valve rod and valve barrel transversely set up in the disk seat, it has the centre bore to bore on the valve rod, the centre bore is seted up along its length direction from the valve rod afterbody, and does not run through whole valve rod, the surface of valve rod is spout welded and is had the tungsten carbide strengthening layer.

Preferably, the central hole phi 90mm is 500mm long.

Preferably, the thickness of the tungsten carbide strengthening layer is 0.5-1 mm.

Preferably, the valve sleeve is fixed in the valve seat and sleeved on the valve rod.

Preferably, the inner surface of the housing is smooth.

Preferably, a sealing plate is arranged in a central hole in the tail portion of the valve rod, and the sealing plate and the valve rod are welded in a surfacing mode.

Preferably, the welding position of the valve rod and the sealing plate is an arc surface processed by a smooth cutter.

Preferably, the valve rod and the valve sleeve are both made of 316L materials.

Compared with the prior art, the utility model has the advantages of: the utility model greatly prolongs the service life of the large valve such as the PTA device, and drills a central hole at the tail part of the valve rod, thereby reducing the weight of the valve rod, reducing the friction force between the valve rod and the valve sleeve and greatly reducing the abrasion loss between the valve rod and the valve sleeve; a tungsten carbide strengthening layer is spray-welded on the outer surface of the valve rod for medium separation, so that the problem that the valve rod and the valve sleeve are easy to adhere due to the same material is solved; meanwhile, the surface hardness of the valve rod is increased, and the wear resistance is improved.

Drawings

Fig. 1 is a schematic view of an assembly structure of a valve rod and a valve sleeve of the present invention;

FIG. 2 is a schematic structural view of the valve stem of the present invention;

fig. 3 is a schematic structural diagram of the valve housing of the present invention.

In the figure: 1. a valve stem; 11. a central bore; 12. a tungsten carbide strengthening layer; 2. a valve housing; 21. a feed inlet; 22. a discharge port; 3. and (7) sealing the plate.

Detailed Description

The present invention will be further explained below.

Embodiment 1, referring to fig. 1 to 3, a multi-way valve structure of a PTA device, the multi-way valve includes a valve rod 1, a valve sleeve 2, a valve seat and an actuator for driving the valve rod 1, the valve rod 1 and the valve sleeve 2 are both made of 316L materials, the utility model discloses a further optimization transformation is performed on the premise of not changing the original valve rod 1 and the valve sleeve 2, the valve rod 1 and the valve sleeve 2 are transversely arranged in the valve seat, a central hole 11 is drilled on the valve rod 1, the central hole 11 Φ 90mm is 500mm long, the central hole 11 is drilled from the tail of the valve rod 1 along the length direction thereof and does not penetrate through the whole valve rod 1, the central hole 11 is drilled from the tail of the valve rod 1 on a machine tool, so as to reduce the weight of the valve rod 1, the pressure to the sleeve below is reduced after the valve rod 1 is transversely inserted into the valve sleeve 2, the friction force is reduced, and the abrasion loss between the valve;

the outer surface of the valve rod 1 is spray-welded with a tungsten carbide strengthening layer 12, and the spray-welding tungsten carbide strengthening layer 12 has two functions, namely, the tungsten carbide strengthening layer is arranged between the valve rod 1 and the valve sleeve 2 to play a role in blocking, so that the problem that the valve rod 1 and the valve sleeve 2 are made of the same material and are easy to adhere when relative motion is generated is solved; secondly, the surface hardness of the valve rod 1 is increased, and the wear resistance is improved.

The service life of large valves such as PTA devices is greatly prolonged by drilling and spray welding tungsten carbide.

From the viewpoint of economy and use effect, it is preferable that the thickness of the tungsten carbide reinforced layer 12 is 0.5 to 1mm through experiments.

The valve sleeve 2 is fixed in the valve seat and sleeved on the valve rod 1, a feed port 21 is radially formed in the valve sleeve 2, a discharge port 22 is formed in the end face of the tail end of the valve sleeve 2, on the basis, the original valve sleeve 2 can be improved in technology, the inner diameter of the valve sleeve 2 is enlarged under the condition that the normal operation of the multi-way valve is not affected, the contact area with the valve rod 1 is reduced, the friction force is reduced, and the inner surface of the valve sleeve 2 is a smooth surface and also aims to reduce the friction force.

The drilling back 1 afterbody of valve rod has the machined hole, for avoiding the material to get into valve rod 1, consequently adopts closing plate 3 to carry out the shutoff, be equipped with closing plate 3 in the centre bore 11 of 1 afterbody of valve rod, build-up welding between closing plate 3 and the valve rod 1. In the process of processing the central hole 11, the central hole 11 is not too large and is not larger than the discharge hole 22 of the valve sleeve 2, the reduction of the sealing surface of the end surfaces of the valve rod 1 and the valve sleeve 2 is avoided,

the welding position of the valve rod 1 and the sealing plate 3 is an arc surface processed by a smooth cutter, so that the expansion amount of surfacing is eliminated, and the welding position is smooth and mellow due to the fillet.

The multi-way valve structure of the PTA device provided by the present invention is described in detail, and specific examples are applied herein to explain the principles and embodiments of the present invention, and the description of the above embodiments is only used to help understanding the method and core ideas of the present invention; while the invention has been described in terms of specific embodiments and applications, it will be apparent to those skilled in the art that numerous variations and modifications can be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a multiple unit valve structure of PTA device, multiple unit valve includes valve rod, valve barrel, disk seat and the actuating mechanism who drives the valve rod which characterized in that: the valve rod and the valve sleeve are transversely arranged in the valve seat, a central hole is drilled in the valve rod, the central hole is formed in the tail portion of the valve rod along the length direction of the valve rod and does not penetrate through the whole valve rod, and a tungsten carbide strengthening layer is welded on the outer surface of the valve rod in a spraying mode.

2. The multi-way valve structure of PTA device of claim 1, wherein: the central hole phi 90mm is 500mm long.

3. The multi-way valve structure of PTA device of claim 1, wherein: the thickness of the tungsten carbide strengthening layer is 0.5-1 mm.

4. The multi-way valve structure of PTA device of claim 1, wherein: the valve sleeve is fixed in the valve seat and sleeved on the valve rod.

5. The multi-way valve structure of PTA device of claim 4, wherein: the inner surface of the valve sleeve is a smooth surface.

6. The multi-way valve structure of PTA device of claim 1, wherein: and a sealing plate is arranged in a central hole at the tail part of the valve rod, and the sealing plate and the valve rod are welded in a surfacing mode.

7. The multi-way valve structure of PTA device of claim 6, wherein: the welding position of the valve rod and the sealing plate is an arc surface processed by a smooth cutter.

8. The multi-way valve structure of the PTA device of claim 1, wherein the valve rod and the valve sleeve are both made of 316L material.