Valve seat structure of open type lock slag valve capable of being purged

Abstract

The utility model relates to the technical field of valves, in particular to a valve seat structure of an open type slag locking valve capable of being purged, which comprises a valve seat body, a disc spring used for abutting against the valve seat body and a supporting seat abutting against one side, away from the valve seat body, of the disc spring, a disc spring cavity used for installing the disc spring is formed between the supporting seat and the valve seat body, and the disc spring cavity is communicated with a valve cavity. The supporting seat is provided with a soot blowing groove; the open type disc spring cavity is adopted, the characteristic of medium circulation is utilized, accumulated impurities can be effectively purged, slag-bonding is prevented from influencing action of the valve, compared with a conventional column spring structure, the phenomenon of impurity blockage can be completely eliminated, the problem of crawling jamming caused by elasticity failure due to spring blockage in the using process of the valve is effectively solved, and the service life of the valve is prolonged. And redundant sealing structures are not needed, the overall structure is simple, maintenance and replacement are convenient and fast, in addition, media are guided through the soot blowing grooves in the supporting parts while the supporting parts are used for supporting the disc springs, and the impurity blowing effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially, relates to a kind of blowable open type lock slag valve seat structure. BACKGROUND

[0002] In the use of coal chemical gasification furnace application working condition, wear resistance, high hardness and other characteristics of valve are higher requirement, while in the gasification furnace slagging process, lock slag ball valve used according to the sequence control program of process, about min action once, and the medium is black water containing slag and solid, medium corrosion is stronger and easy to block. When valve is used, dust, solid particles and other impurities in medium are easy to block in spring cavity, leading to spring elasticity failure, causing valve to appear crawling and jamming phenomenon, unable to achieve long period use.

[0003] Common spring compensation types include column spring structure, disc spring structure, rubber spring structure, etc., but all need to seal at the spring installation position of valve seat, as shown in the drawings. Figure 1

[0004] In the use process, although sealing structure is increased, but it is found that protection cannot be effectively carried out in the use process, in spring cavity space, dust and other impurities are still blocked, leading to elastic failure, finally causing valve to appear crawling and jamming phenomenon.

[0005] In view of the above problems, in order to ensure that valve achieves long period use, through experience summary and on-site valve structure upgrading in actual inspection and repair process, it is found that how to design dustproof sealing structure cannot effectively seal, and cannot achieve expected design effect. Then according to actual use demand on site, valve seat elastic compensation position is directly made into open type structure, and the flow rate and pressure difference of medium are used to blow spring position, so that dust and other solid-containing medium cannot adhere to spring position. CONTENT OF THE UTILITY MODEL

[0006] The utility model solves the technical problems that, in the prior art, after sealing at the spring installation position of valve seat, protection cannot be effectively carried out, spring cavity space is still blocked by dust and other impurities, leading to elastic failure, finally causing valve to appear crawling and jamming phenomenon, and provides a kind of blowable open type lock slag valve seat structure.

[0007] In order to solve the above technical problems, the utility model adopts the following technical scheme: a kind of blowable open type lock slag valve seat structure, comprising:

[0008] Valve seat body;

[0009] Disc spring, for making valve seat body and ball core resist and seal;

[0010] ​And a support seat is arranged on the side of the disc spring away from the valve seat body, a disc spring cavity for mounting the disc spring is formed between the support seat and the valve seat body, the disc spring cavity is communicated with the valve cavity, and the support seat is provided with a soot blowing groove for guiding the medium to enter the disc spring cavity and blowing off impurities in the disc spring cavity.

[0011] Further, the soot blowing groove comprises a first flow guide groove and a second flow guide groove which are communicated with each other and are respectively used for guiding the medium to flow into or flow out of the disc spring cavity.

[0012] Further, the side of the support seat close to the disc spring is protruded to form a plurality of support portions for supporting the disc spring, and the first flow guide groove is recessed between two adjacent support portions.

[0013] Further, the support seat is in a ring structure, the support portion extends to form an extension section towards the outer ring of the support seat, and the protruding height of the extension section gradually decreases from the inner ring to the outer ring to form the second flow guide groove together with the inner wall of the valve body.

[0014] Further, at least two groups of sealing structures are arranged between the valve seat body and the valve body.

[0015] Further, one group of the at least two groups of sealing structures is an elastic sealing ring, and the other group of sealing structures comprises a graphite ring and a pressing ring arranged between the graphite ring and the disc spring to separate the graphite ring from the disc spring.

[0016] Further, a dustproof packing is arranged between the support seat and the valve body.

[0017] The disc spring cavity of the utility model is open, the characteristics of medium circulation are utilized, the accumulated impurities can be effectively blown off, the influence of slag on the valve action is prevented, the phenomenon of impurity blockage can be completely eliminated compared with the conventional column spring structure, the problem that the spring blockage causes the elastic failure to lead to the crawling and jamming of the valve in the use process is effectively solved, no additional sealing structure is needed, the overall structure is simple, the maintenance and replacement are convenient, in addition, the disc spring is supported by the support portion and the medium is guided by the soot blowing groove on the support portion, and the impurity blowing effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model is further described below in combination with the drawings and examples.

[0019] Figure 1 is a structure schematic view of the prior art valve seat;

[0020] Figure 2 is a structure schematic view of the utility model;

[0021] Figure 3 is Figure 2A part of the local enlarged view (i.e. the structural schematic view of example one);

[0022] Figure 4 is the structural schematic view of example two (i.e. without graphite ring and pressing ring);

[0023] Figure 5 is the three-dimensional schematic view of the support seat;

[0024] Figure 6 is the top view of the support seat;

[0025] Figure 7 is Figure 6 the structural schematic view in B-B direction.

[0026] In the figure:

[0027] 1, valve seat body;

[0028] 2, disc spring;

[0029] 3, support seat;301, first flow guide groove;302, second flow guide groove;303, support part;304, extension section;

[0030] 4, valve body;401, valve cavity;402, liquid inlet flow channel;403, liquid outlet flow channel;

[0031] 5, elastic sealing ring;

[0032] 6, graphite ring;

[0033] 7, pressing ring;

[0034] 8, dustproof packing;

[0035] 9, ball core;

[0036] 1', valve body;

[0037] 2', spring; DETAILED DESCRIPTION

[0038] The utility model will be explained in further detail in combination with the drawings. These drawings are all simplified schematic views, and only schematically illustrate the basic structure of the utility model, therefore, it only shows the structure related to the utility model, and the direction and reference (such as up, down, left, right, etc.) can be only used to help the description of the features in the drawings. Therefore, the following specific embodiments are not in the restrictive sense, and the range of the claimed subject matter is only limited by the appended claims and their equivalents.

[0039] As Figure 2 , Figure 3 and Figure 4As shown, a valve seat structure of a purgeable open-type lock residue valve is installed in a valve cavity 401 of a valve body 4, and is used in cooperation with a ball core 9 to communicate or block a liquid inlet flow channel 402 and a liquid outlet flow channel 403 to realize opening or closing of the valve. The valve seat structure comprises a valve seat body 1, a disc spring 2 and a support seat 3.

[0040] The disc spring 2 is used to abut against the valve seat body 1 to make it abut against the ball core 9 to seal.

[0041] The support seat 3 abuts against a side of the disc spring 2 away from the valve seat body 1, and a disc spring cavity for installing the disc spring 2 is formed between the support seat 3 and the valve seat body 1. The disc spring cavity communicates with the valve cavity 401 and the liquid inlet flow channel 402 (or the liquid outlet flow channel 403), that is, the disc spring cavity in the valve seat structure on the liquid inlet flow channel side communicates with the valve cavity 401 and the liquid inlet flow channel 402, and the disc spring cavity in the valve seat structure on the liquid outlet flow channel side communicates with the valve cavity 401 and the liquid outlet flow channel 403. In the present embodiment, the sealed spring cavity in the prior art is changed to an open structure, and the "block" is changed to "communication". The dustproof function of the spring cavity in the prior art is changed to blowing out impurities in the spring cavity by medium. Similarly, the impurities can be removed, and the effect is better. In the present embodiment, the elastic compensation member is the disc spring 2. This is because cylindrical springs, rubber springs and the like need to be specially designed for spring installation space. In this case, as long as there is a semi-closed space, dust and other media will accumulate in the space. When the medium passes through, the accumulated substances in the closed space cannot be effectively blown off, which causes the spring to lose its elasticity, the valve seat loses its elastic compensation, and the spring will start to jam the valve. Finally, the ball core 9 and the valve seat are severely damaged. The disc spring 2 structure does not need to be specially designed for installation space and can be directly installed on a plane. Under the action of the pressure difference before and after, the accumulated impurities in the open cavity can be effectively cleaned and blown off when the medium passes through.

[0042] The support seat 3 is provided with a dust blowing groove for guiding the medium to enter the disc spring cavity and blow off the impurities in the disc spring cavity. The support seat 3 supports the disc spring 2, and the dust blowing groove on the support seat 3 guides the medium to flow into the disc spring cavity to blow off the impurities in the disc spring cavity and carry the impurities out of the disc spring cavity.

[0043] In some examples, as shown in Figure 3 , Figure 4 and Figure 5 , the dust blowing groove comprises a first flow guide groove 301 and a second flow guide groove 302 which are in communication with each other and are respectively used for guiding the medium to flow into or out of the disc spring cavity. The first flow guide groove 301 has a first flow guide surface, the second flow guide groove 302 has a second flow guide surface, and the inclination direction of the first flow guide surface is opposite to the inclination direction of the second flow guide surface. Figure 3 and Figure 4For the valve seat structure arranged at the inlet flow channel 402 side, for example, the first flow guide groove 301 is located at the side close to the inlet flow channel 402 for guiding the medium to enter, and the second flow guide groove 302 is located at the side close to the valve cavity 401 for guiding the medium to flow out. Similarly, for the valve seat structure arranged at the outlet flow channel 403 side, the second flow guide groove 302 is located at the side close to the valve cavity 401 for guiding the medium to flow in, and the first flow guide groove 301 is located at the side close to the outlet flow channel 403 for guiding the medium to flow out.

[0044] In some examples, as shown in Figures 5-7 The support seat 3 is protruded at the side close to the disc spring 2 to form a plurality of support portions 303 for supporting the disc spring 2. The support portions 303 are distributed along the circumference of the support seat 3. The support surface of the support portion 303 is a plane for providing stable support for the disc spring 2. The first flow guide groove 301 is recessed between two adjacent support portions 303.

[0045] In some examples, as shown in Figure 7 The support seat 3 is in a ring structure. The support portion 303 extends outwardly from the outer ring of the support seat 3 to form an extension segment 304. The protruding height of the extension segment 304 gradually decreases from the inner ring to the outer ring to form the second flow guide groove 302 in cooperation with the inner wall of the valve body 4. That is, the second flow guide surface of the second flow guide groove 302 gradually inclines away from the inlet flow channel 402 from the outer ring to the inner ring. The inclination angle a is about 30°±2°. The width of the second flow guide groove 302 gradually decreases from the outer ring to the inner ring. The first flow guide surface of the first flow guide groove 301 gradually inclines toward the inlet flow channel 402 from the outer ring to the inner ring. The inclination angle is about 60°±2°. The width of the first flow guide groove 301 gradually increases from the outer ring to the inner ring.

[0046] In some examples, as shown in Figure 3 At least two sets of sealing structures are arranged between the valve seat body 1 and the valve body 4 to improve the sealing effect therebetween.

[0047] In some examples, as shown in Figure 3 One of the at least two sets of sealing structures is an elastic sealing ring 5, which can be but is not limited to an O-shaped sealing ring. The other set of sealing structures includes a graphite ring 6 and a pressing ring 7 arranged between the graphite ring 6 and the disc spring 2 to separate the graphite ring 6 from the disc spring 2. The outer peripheral wall of the valve seat body 1 is recessed to form a mounting groove for mounting the graphite ring 6. The pressing ring 7 is protruded toward the graphite ring 6 to form a first protruding portion for limiting the graphite ring 6 in the mounting groove. A first limiting step is formed at the protruding portion for cooperating with the valve seat body 1.

[0048] The pressure is transmitted to the compression ring 7 after the disc spring 2 generates elastic force, the compression ring 7 compresses the graphite ring 6 to generate elastic deformation to seal, because the graphite ring 6 is used for sealing, the material is soft, and the compression ring 7 is metal material, the hardness is higher, which can prevent the soft graphite ring 6 from being damaged by directly contacting the disc spring 2.

[0049] In some examples, the inner peripheral wall of the support seat 3 is protruded in the direction of the liquid inlet flow channel 402 to form a second protruding part, and a second limiting step for cooperating with the valve body 4 is formed at the protruding part, a dustproof packing 8 is arranged between the second protruding part and the valve body 4, to realize the sealing between the support seat 3 and the valve body 4.

[0050] With the above ideal embodiments of the present application as the inspiration, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A purgeable open lock valve seat structure, characterized by: The utility model relates to a valve seat body (1), a disc spring (2) for making the valve seat body (1) and ball core (9) resist and seal, and a support seat (3) which leans on the side of the disc spring (2) away from the valve seat body (1), a disc spring cavity for installing the disc spring (2) is formed between the support seat (3) and the valve seat body (1), the disc spring cavity is communicated with the valve cavity (401), and the support seat (3) is provided with a soot blowing groove for guiding medium to enter the disc spring cavity and blowing off impurities in it. The soot blowing groove comprises a first flow guide groove (301) and a second flow guide groove (302) which are communicated with each other and are respectively used for guiding the medium to flow into or out of the disc spring cavity. The side of the support seat (3) close to the disc spring (2) is protruded to form a plurality of support parts (303) for supporting the disc spring (2), and the first flow guide groove (301) is recessed between two adjacent support parts (303). The support seat (3) is in a ring structure, the support part (303) extends to form an extension section (304) towards the outer ring of the support seat (3), and the protruding height of the extension section (304) gradually decreases from the inner ring to the outer ring to form the second flow guide groove (302) together with the inner wall of the valve body (4).

2. A purgeable open lock valve seat structure according to claim 1, characterized in that: At least two sets of sealing structures are arranged between the valve seat body (1) and the valve body (4).

3. A purgeable open lock valve seat structure according to claim 2, wherein: One of the at least two sets of sealing structures is an elastic sealing ring (5), and the other set of sealing structures comprises a graphite ring (6) and a pressing ring (7) arranged between the graphite ring (6) and the disc spring (2) to separate the graphite ring (6) from the disc spring (2).

4. A purgeable open lock valve seat structure according to claim 3, wherein: A dustproof packing (8) is arranged between the support seat (3) and the valve body (4).

5. A purgeable open lock valve seat structure according to claim 1, wherein: ​ 6. A purgeable open lock valve seat structure according to claim 5, wherein: ​ 7. A purgeable open lock valve seat structure according to claim 1, wherein: ​

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