CN219035606U

CN219035606U - Hydraulic expanding and shrinking device in disc valve

Info

Publication number: CN219035606U
Application number: CN202222526497.3U
Authority: CN
Inventors: 张四维; 高峰
Original assignee: Inner Mongolia Datang Dingwang Chemical Co ltd
Current assignee: Inner Mongolia Datang Dingwang Chemical Co ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-05-16
Anticipated expiration: 2032-09-23

Abstract

The utility model provides a hydraulic expansion device in a disc valve, which comprises: the valve comprises a driving cylinder, a valve body, a valve rod, a left valve seat, a right valve seat, a valve cover and a valve core assembly; the driving cylinder is connected with the valve core assembly through a valve rod penetrating through the valve body; the valve core assembly comprises a valve plate which is bilaterally symmetrical, a hydraulic pipe sleeve and a corrugated hydraulic expansion pipe; the two ends of the hydraulic pipe sleeve are of an opening structure, extend into the central blind holes of the left valve plate and the right valve plate respectively, and are fixedly connected with the valve rod; the corrugated hydraulic expansion pipe is arranged in the hydraulic pipe sleeve; the corrugated hydraulic expansion pipe is connected with a hydraulic oil inlet pipeline and a hydraulic oil outlet pipeline, and the hydraulic oil inlet pipeline and the hydraulic oil outlet pipeline penetrate through the hydraulic pipe sleeve and the valve cover and are connected with the hydraulic oil storage and controller. The device solves the problems of poor sealing effect, reduced working efficiency and greatly shortened service life caused by uneven spring force and fatigue attenuation of the spring due to the fact that the valve core device of the conventional disc valve uses the spring.

Description

Hydraulic expanding and shrinking device in disc valve

Technical Field

The utility model relates to the technical field of valve sealing, in particular to a hydraulic expansion device in a disc valve.

Background

The valve is used in material conveying system to control the direction, pressure and flow of material, and is used to make the material in pipe and equipment flow or stop and control its flow. The disc valve is a valve body which drives a valve plate to move through a valve rod, so that the valve is opened and closed. When the valve of the disc valve is opened and closed, the valve plate moves in a rotary mode, so that the disc valve has a self-grinding function, the sealing performance can be continuously improved in the conveying process of worn and eroded materials, the maintenance and operation adjustment of the valve are facilitated, and the disc valve is widely applied.

However, the existing disc valve is poor in sealing performance due to unreasonable structure. The internal sealing design of the existing disc valve is as follows: the valve core device and the valve seat in the valve are kept in contact by the expanding and contracting force of the spring in the valve core device, and when the valve core works and moves, attachments on the sealing surface of the valve plate can be cleaned. Therefore, in the existing disc valve, the valve plate is tightly pressed on the left valve seat and the right valve seat only through the spring, if the elastic force of the spring is too small, the sealing performance between the valve plate and the valve seat is poor, the complete closing effect cannot be achieved, and materials in the pipeline easily enter the inner cavity of the valve body and are accumulated, so that the valve is opened and closed to fail; if the elastic force of the spring is too large, the friction force between the valve plate seat on the valve plate and the left valve seat and the right valve seat is too large, so that the abrasion of the valve plate and the valve plate seat is faster, and the service life is lower.

Therefore, in actual production and use, due to the conditions of uneven elastic force of the spring in the valve core device of the disc valve, fatigue attenuation of the elastic force of the spring caused by the extension of the service time and the like, when materials flowing through the valve fluctuate greatly, materials or impurities enter and adhere to the sealing surface of the valve plate to influence the tightness of the disc valve, so that the tightness of the disc valve is poor, the working efficiency is reduced, even the opening and closing failure condition occurs, the service life is greatly shortened, the normal use of the disc valve is seriously influenced, and the application prospect is limited.

Disclosure of Invention

The utility model provides a hydraulic expansion device in a disc valve, which is used for solving the problems of poor sealing effect, low working efficiency and greatly shortened service life of the disc valve caused by uneven elastic force and fatigue attenuation of the elastic force of the spring due to the use of the spring in the valve core device of the existing disc valve.

The utility model provides a hydraulic expansion device in a disc valve, which comprises: the valve comprises a driving cylinder, a valve body, a valve rod, a left valve seat, a right valve seat, a valve cover and a valve core assembly; the driving cylinder is arranged above the valve body, the valve cover, the left valve seat, the right valve seat and the valve body enclose a sealed valve cavity, and the driving cylinder is connected with the valve core assembly through a valve rod penetrating through the valve body.

The valve core assembly comprises a valve plate which is bilaterally symmetrical, a hydraulic pipe sleeve and a corrugated hydraulic expansion pipe; the two ends of the hydraulic pipe sleeve are of an opening structure, extend into the central blind holes of the left valve plate and the right valve plate respectively, and are fixedly connected with the valve rod; the corrugated hydraulic expansion pipe is arranged inside the hydraulic pipe sleeve.

Sealing surfaces are respectively formed between the valve plate and the left valve seat as well as between the valve plate and the right valve seat; the corrugated hydraulic expansion pipe is connected with a hydraulic oil inlet pipeline and a hydraulic oil outlet pipeline, and the hydraulic oil inlet pipeline and the hydraulic oil outlet pipeline penetrate through the hydraulic pipe sleeve and the valve cover and are connected with the hydraulic oil storage and controller.

Wherein, the valve plate, the left valve seat and the right valve seat are all made of integrally sintered hard alloy.

The hydraulic oil inlet pipeline and the hydraulic oil outlet pipeline are metal hoses or thick-skin hoses with corrosion-resistant and wear-resistant coatings on the outer walls.

The left valve seat and the right valve seat are directly and tightly connected with the valve cover and the valve body into a whole through a plurality of detachable studs, and the two ends of each stud are respectively provided with a flexible graphite winding gasket with high temperature resistance, corrosion resistance and low leakage.

Wherein, valve rod and drive cylinder link together through the shaft coupling.

The inner walls of the left valve seat and the right valve seat are also provided with protective coatings, the protective coatings are provided with two layers from outside to inside, the inner layer is a corrosion-resistant layer, and the outer layer is an aging-resistant layer; the ageing-resistant layer is made of polytetrafluoroethylene materials, and the corrosion-resistant layer is made of fluororubber materials.

The center of the valve cover is provided with a purging hole, and the inside of the purging hole is connected with an elastic sealing plug in a clamping way; the hydraulic oil inlet pipeline and the hydraulic oil outlet pipeline are connected with the corrugated hydraulic expansion pipe through purge holes.

The hydraulic expansion device in the disc valve provided by the utility model has the beneficial effects that the following beneficial effects are realized by changing the spring of the adjusting valve core into the hydraulic adjusting device:

1) The utility model adopts the combination of the hydraulic control technology and the bellows expansion technology to seal the sealing surface of the disc valve, the contact force between the valve plate and the valve seat is provided by the bellows hydraulic expansion pipe, the hydraulic pressure in the bellows hydraulic expansion pipe is regulated and controlled by an external hydraulic oil storage and controller, after the hydraulic oil medium enters the bellows hydraulic expansion pipe, the bellows hydraulic expansion pipe is pressed to extend to drive the valve plate to contact with the left valve seat and the right valve seat for sealing, and after the hydraulic pressure in the bellows hydraulic expansion pipe is released, the bellows hydraulic expansion pipe is restored to the original state, and the valve plate is separated from the left valve seat and the right valve seat.

2) The disc valve has the advantages of simple sealing structure, safety, reliability and good sealing performance, can be conveniently debugged and maintained in the use process, can ensure the normal operation of the valve under the working condition under various different temperature and pressure states, and can be also suitable for the working condition and places requiring high-frequency valve opening and closing.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a hydraulic expansion device in a disc valve according to an embodiment of the present utility model;

FIG. 2 is a schematic structural diagram of a valve core assembly according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a hydraulic expansion device in a disc valve according to another embodiment of the present utility model.

Reference numerals illustrate:

1. the hydraulic oil storage device comprises a driving cylinder, 2, a valve body, 3, a valve rod, 4, a left valve seat, 5, a right valve seat, 6, a valve cover, 8, a coupler, 41, a corrosion-resistant layer, 42, an ageing-resistant layer, 61, a purge hole, 62, an elastic sealing plug, 71, a valve plate, 72, a hydraulic pipe sleeve, 73, a corrugated hydraulic expansion pipe, 74, a hydraulic oil inlet pipeline, 75, a hydraulic oil outlet pipeline, 76 and a hydraulic oil storage controller.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are also within the scope of the utility model.

As shown in fig. 1 and 2, the present utility model provides a hydraulic expansion device in a disc valve, comprising: the valve comprises a driving cylinder 1, a valve body 2, a valve rod 3, a left valve seat 4, a right valve seat 5, a valve cover 6 and a valve core assembly; the driving cylinder 1 is arranged above the valve body 2, the valve cover 6, the left valve seat 4, the right valve seat 5 and the valve body 2 enclose a sealed valve cavity, and the driving cylinder 1 is connected with the valve core assembly through the valve rod 3 penetrating through the valve body 2.

The valve core assembly comprises a valve plate 71 which is bilaterally symmetrical, a hydraulic pipe sleeve 72 and a corrugated hydraulic expansion pipe 73; the two ends of the hydraulic pipe sleeve 72 are of an opening structure, and the two ends of the hydraulic pipe sleeve 72 respectively extend into the central blind holes of the left valve plate 71 and the right valve plate 71 and are fixedly connected with the valve rod 3; a bellows hydraulic expansion tube 73 is placed inside the hydraulic tube sleeve 72.

Wherein sealing surfaces are respectively formed between the valve plate 71 and the left valve seat 4 and the right valve seat 5; the corrugated hydraulic expansion pipe 73 is connected with a hydraulic oil inlet pipeline 74 and a hydraulic oil outlet pipeline 75, and the hydraulic oil inlet pipeline 74 and the hydraulic oil outlet pipeline 75 penetrate through the hydraulic pipe sleeve 72 and the valve cover 6 and are connected with a hydraulic oil storage and control device 76.

The two valve plates 71 of the valve core assembly can rotate around the central axis in the valve opening and closing process, and continuously scrape the materials on the sealing surface, so that the materials can be prevented from damaging the sealing surface. The corrugated hydraulic expansion pipe 73 is arranged between the two valve plates 71, when the sealing surface is worn to reduce the sealing performance, the valve plates 71 can be adjusted in tension through the corrugated hydraulic expansion pipe 73, the valve plates 71 can be tightly attached to the left valve seat 4 and the right valve seat 5, and a good sealing effect can be continuously maintained.

The corrugated hydraulic expansion pipe 73 can expand and stretch in the axial direction, so that left and right valve plates 71 at two ends are adapted, when the valve is opened, hydraulic oil medium is discharged through a hydraulic oil outlet pipeline 75, the corrugated hydraulic expansion pipe 73 is not contacted with the left and right valve plates 71, and movement of a valve core assembly is facilitated; when the valve is closed, hydraulic oil medium is input into the corrugated hydraulic expansion pipe 73 through the hydraulic oil inlet pipeline 74, and the corrugated hydraulic expansion pipe 73 expands to be propped against the left valve plate 71 and the right valve plate 71, so that the sealing surface is in a sealed closed state, and the sealing effect of the interior of the valve is ensured.

The driving cylinder 1 drives the valve rod 3 to reciprocate in the valve, the valve rod 3 is utilized to adjust the position of the valve core assembly, and the opening and closing of the valve are realized, so that the material passing or stopping is facilitated, the full-automatic operation of the disc valve is realized, the valve is not required to be opened or closed by manpower, and the operation is simple and convenient.

The disc valve has good sealing performance, the valve plate 71 in the valve core assembly can rotate and grind automatically, and the sealing surface is ground and polished continuously, so that the disc valve is not easy to be eroded and worn by materials, has high wear resistance, and is durable.

In a preferred embodiment, the valve plate 71, the left valve seat 4 and the right valve seat 5 are made of cemented carbide integrally sintered. Specifically, the hard alloy such as tungsten carbide, titanium carbide and the like has high hardness, high wear resistance and high compressive strength.

The valve plate 71, the left valve seat 4 and the right valve seat 5 are preferably made of hard alloy, and the material has high bending strength, high hardness, high wear resistance, corrosion resistance and other stable chemical properties, can ensure that a formed sealing surface has wear resistance and corrosion resistance, and is favorable for ensuring that the sealing surface still maintains high wear resistance and sealing property under the condition of long-term autorotation and self-grinding.

In a preferred embodiment, the hydraulic oil inlet line 74 and the hydraulic oil outlet line 75 are metal hoses or thick-gauge hoses with corrosion and abrasion resistant coatings on the outer walls. Alternatively, the hydraulic oil inlet line 74 and the hydraulic oil outlet line 75 may be a metal hose or a thick-gauge hose covered with a protective tube that resists corrosion and abrasion.

The hydraulic oil inlet line 74 and the hydraulic oil outlet line 75 are used for inputting and outputting hydraulic oil medium into the bellows hydraulic expansion pipe 73, so as to control the opening degree of the bellows hydraulic expansion pipe 73, and thus control the tightness between the left and right valve plates 71 and the left and right valve seats 4 and 5. Because the hydraulic oil inlet pipeline 74 and the hydraulic oil outlet pipeline 75 move along with the valve core assembly, the materials of the hydraulic oil inlet pipeline 74 and the hydraulic oil outlet pipeline 75 are flexible, waterproof, corrosion-resistant and abrasion-resistant, and the flexible pipes are convenient to adapt to different length ranges, so that when the valve core assembly moves, the hydraulic oil inlet pipeline 74 and the hydraulic oil outlet pipeline 75 can also move along with the valve core assembly, the hydraulic oil inlet pipeline 74 and the hydraulic oil outlet pipeline 75 are prevented from being separated from the corrugated hydraulic expansion pipe 73, and meanwhile, the corrosion-resistant and abrasion-resistant performances of the hydraulic oil inlet pipeline and the hydraulic oil outlet pipeline can also be guaranteed to avoid frequent replacement and maintenance, so that the service life of the valve is guaranteed.

In a preferred embodiment, the left valve seat 4 and the right valve seat 5 are directly and tightly connected with the valve cover 6 and the valve body 2 into a whole through a plurality of detachable studs, and both ends of each stud are provided with flexible graphite winding gaskets with high temperature resistance, corrosion resistance and low leakage.

The left valve seat 4, the right valve seat 5, the valve cover 6 and the valve body 2 are tightly connected into a whole by virtue of studs, flexible graphite winding gaskets are arranged at the two ends of each stud, and the flexible graphite winding gaskets have reversible deformation and elasticity, can generate larger deformation under the action of small external force, and can recover the original shape after the external force is removed, so that reliable sealing between all connecting pieces is fully ensured.

As shown in fig. 3, in a preferred embodiment, the valve stem 3 and the actuating cylinder 1 are connected together by a coupling 8.

As shown in fig. 2, in a preferred embodiment, a protective coating is further arranged on the inner walls of the left valve seat 4 and the right valve seat 5, the protective coating is formed by two layers from outside to inside, the inner layer is a corrosion-resistant layer 41, and the outer layer is an aging-resistant layer 42; the aging-resistant layer 42 is made of polytetrafluoroethylene material, and the corrosion-resistant layer 41 is made of fluororubber material.

The inner wall of the valve seat is provided with the protective coating, so that the material of the valve seat can be protected from being corroded and worn by materials, the sealing performance of the sealing surface between the left valve seat and the right valve seat and the valve plate 71 is guaranteed, and the service lives of the left valve seat and the right valve seat and the disc valve can be prolonged.

As shown in fig. 3, in a preferred embodiment, a purge hole 61 is formed in the center of the valve cover 6, and an elastic sealing plug 62 is connected to the inside of the purge hole 61 in a clamping manner; the hydraulic oil feed line 74 and the hydraulic oil discharge line 75 are connected to the bellows hydraulic expansion pipe 73 through the purge hole 61.

Through the setting of sweeping hole 61, can sweep the cleaning to the valve cavity, can effectively solve the problem of disc valve pocket material accumulation for the valve can not block up the card and die, make the valve be applicable to the transportation of the powdery and/or granular material of easy coking, also can be applicable to the transportation of the fluid that viscosity is big.

When the disc valve is required to be opened, the driving cylinder 1 controls the valve rod 3 to move upwards, meanwhile, the corrugated hydraulic expansion pipe 73 is controlled through the hydraulic oil storage and controller 76, so that hydraulic oil medium in the corrugated hydraulic expansion pipe 73 is discharged through the hydraulic oil outlet pipeline 75, the corrugated hydraulic expansion pipe 73 is not contacted with the left valve plate 71 and the right valve plate 71, friction between the left valve seat and the right valve plate 71 is reduced, and upward movement of the valve core assembly is facilitated. At this time, the valve rod 3 drives the whole valve core assembly to move upwards through the hydraulic pipe sleeve 72 arranged in the central blind holes of the left valve plate 71 and the right valve plate 71, and brings the valve core assembly away from the sealing surface, so that the valve opening is completed.

When the disc valve is closed, the driving cylinder 1 controls the valve rod 3 to move downwards, and meanwhile, the hydraulic oil inlet pipeline 74 is controlled through the hydraulic oil storage and controller 76, so that hydraulic oil medium is input into the corrugated hydraulic expansion pipe 73, and the corrugated hydraulic expansion pipe 73 expands to be propped against the left valve plate 71 and the right valve plate 71 under the hydraulic action. After the left and right valve plates 71 and the left and right valve seats reform into sealing surfaces, the left and right valve plates 71 are propped against the left and right valve seats 4 and 5 by the corrugated hydraulic expansion pipe 73, and at this time, the sealing surfaces formed by the left and right valve plates 71 and the left and right valve seats are in a sealing closed state, and a good sealing effect is continuously maintained, so that valve closing is completed.

In the present utility model, the detailed structure of some devices is not described in detail, but is known in the art, and is not described herein.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solution of the present utility model, and not limiting thereof; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will appreciate that; the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. The utility model provides a hydraulic expansion device in disc valve which characterized in that: comprising the following steps: the valve comprises a driving cylinder, a valve body, a valve rod, a left valve seat, a right valve seat, a valve cover and a valve core assembly;

the driving cylinder is arranged above the valve body, the valve cover, the left valve seat, the right valve seat and the valve body enclose a sealed valve cavity, and the driving cylinder is connected with the valve core assembly through the valve rod penetrating through the valve body;

the valve core assembly comprises a valve plate which is bilaterally symmetrical, a hydraulic pipe sleeve and a corrugated hydraulic expansion pipe; the two ends of the hydraulic pipe sleeve are of an opening structure, extend into the center blind holes of the left valve plate and the right valve plate respectively, and are fixedly connected with the valve rod; the corrugated hydraulic expansion pipe is arranged inside the hydraulic pipe sleeve;

sealing surfaces are respectively formed between the valve plate and the left valve seat and between the valve plate and the right valve seat;

the corrugated hydraulic expansion pipe is connected with a hydraulic oil inlet pipeline and a hydraulic oil outlet pipeline, and the hydraulic oil inlet pipeline and the hydraulic oil outlet pipeline penetrate through the hydraulic pipe sleeve and the valve cover and are connected with a hydraulic oil storage and controller.

2. The hydraulic expansion device in a disc valve according to claim 1, wherein: the valve plate, the left valve seat and the right valve seat are made of integrally sintered hard alloy.

3. The hydraulic expansion device in a disc valve according to claim 1, wherein: the hydraulic oil inlet pipeline and the hydraulic oil outlet pipeline are metal hoses or thick-skin hoses with corrosion-resistant and wear-resistant coatings on the outer walls.

4. The hydraulic expansion device in a disc valve according to claim 1, wherein: the left valve seat and the right valve seat are directly and tightly connected with the valve cover and the valve body into a whole through a plurality of detachable studs, and the two ends of each stud are respectively provided with a flexible graphite winding gasket with high temperature resistance, corrosion resistance and low leakage.

5. The hydraulic expansion device in a disc valve according to claim 1, wherein: the valve rod and the driving cylinder are connected together through a coupler.

6. The hydraulic expansion device in a disc valve according to claim 1, wherein: the inner walls of the left valve seat and the right valve seat are also provided with protective coatings, the protective coatings are provided with two layers from outside to inside, the inner layer is a corrosion-resistant layer, and the outer layer is an aging-resistant layer;

the aging-resistant layer is made of polytetrafluoroethylene materials, and the corrosion-resistant layer is made of fluororubber materials.

7. A hydraulic expansion device in a disc valve according to any of claims 1-6, characterized in that: a purging hole is formed in the center of the valve cover, and an elastic sealing plug is connected in a clamping manner in the purging hole; the hydraulic oil inlet pipeline and the hydraulic oil outlet pipeline are connected with the corrugated hydraulic expansion pipe through the purging hole.