Valve seat sealing assembly and ball valve adopting same

Abstract

The utility model relates to the technical field of valve seats, in particular to a valve seat sealing assembly and a ball valve adopting the same, which comprise a valve seat body and a ball body, the outer side of the valve seat body is connected with a valve body of the ball valve, the inner side of the valve seat body is matched with the ball body, and the valve seat sealing assembly further comprises an annular sealing ring. The sealing ring is arranged between the valve seat body and the ball body, a mounting groove is formed in the valve seat body and used for mounting the sealing ring, the sealing ring is abutted against the ball body and the valve seat body at the same time, the sealing ring is elastic, and a preset gap is further formed in the mounting groove and used for providing a deformation space for the sealing ring. After the sealing ring is installed, under the pressure effect of the ball body, part of the sealing ring is compressed into the preset gap. Soft sealing is formed between the valve seat body and the ball body through the arranged sealing ring, and therefore the sealing performance between the valve seat body and the ball body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve seats, in particular to a valve seat sealing component and a ball valve using the sealing component. Background Art

[0002] Fixed ball valves are commonly used in long-distance pipelines and general industrial pipelines. They consist of a ball, valve body, and valve seat. The valve seat structure and the ball are usually sealed by a hard seal formed by abutment. Although this method can also form a relatively reliable sealing effect between the valve seat structure and the ball, as research deepens, this seal still has shortcomings. The reasons are:

[0003] During use, the ball valve is controlled by the rotation of the ball. The ball and the valve seat are hard-sealed with each other. Each time the ball rotates, there is a certain degree of wear between the ball and the valve seat. If the degree of wear of the ball and the valve seat is consistent in the circumferential direction of the ball's rotation, such wear will not lead to a reduction in sealing performance. However, due to assembly errors and error factors such as the quality of the ball and valve seat materials, the degree of wear of the ball and the valve seat in the circumferential direction of the ball's rotation is not consistent. As a result, after long-term use, the local area of ​​the abutment between the ball and the valve seat may have a problem of loose sealing due to excessive wear.

[0004] In particular, due to assembly considerations, there may be more or less fitting clearance between the ball and the valve seat. During actual use, the medium in the middle cavity may enter the fitting clearance between the ball and the valve seat, which further increases the friction coefficient between the ball and the valve seat, and further accelerates the wear of the ball surface and the valve seat surface when the ball rotates, which further deteriorates the overall sealing performance of the ball valve and shortens the service life of the ball valve.

[0005] Therefore, how to improve the sealing reliability between the valve seat and the ball is a technical problem that needs to be solved urgently in the current research on increasing the service life of ball valves. Utility Model Content

[0006] The purpose of the utility model is to provide a valve seat sealing assembly and a ball valve that can improve the sealing reliability of the ball valve and increase the service life of the ball valve, in order to address the problem that in the current ball valve structure, the ball and the valve seat adopt a hard sealing structure, which leads to low reliability of the sealing performance of the ball valve and affects the service life of the ball valve.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A valve seat sealing assembly comprises a valve seat body and a ball, wherein the outer side of the valve seat body is connected to the valve body of the ball valve, and the inner side of the valve seat body is matched with the ball;

[0009] The valve seat sealing assembly also includes an annular sealing ring, which is arranged between the valve seat body and the ball. A mounting groove is provided on the valve seat body, and the mounting groove is used to install the sealing ring. The sealing ring is kept in contact with the ball and the valve seat body at the same time. The sealing ring is elastic, and a preset gap is also provided in the mounting groove. The preset gap is used to provide deformation space for the sealing ring, so that after the sealing ring is installed, part of the sealing ring is compressed into the preset gap under the action of the ball pressure.

[0010] Preferably, the ball is in contact with the valve seat body.

[0011] Preferably, there is a clearance fit between the sphere and the valve seat body.

[0012] Preferably, the sealing ring is a triangular sealing ring, the cross section of the sealing ring is triangular or quasi-triangular, and the cross section of the mounting groove is a dovetail groove that matches the shape of the sealing ring.

[0013] Preferably, the corners of the sealing ring are arc-shaped.

[0014] Preferably, the preset gap is set at a bottom edge position of the installation groove corresponding to a corner area of ​​the sealing ring.

[0015] Preferably, a scraper is further provided between the valve seat body and the sphere. The scraper is an elastic sheet. One end of the scraper is inserted into the sphere, and the other end is adapted to the shape of the surface of the sphere and abuts against the surface of the sphere. The scraper is provided on the side of the sealing ring facing the inside of the sphere.

[0016] Preferably, the scraper blade abuts against the sealing ring, and the end of the scraper blade located inside the sphere is serrated with a plurality of grooves.

[0017] A ball valve using a valve seat sealing assembly includes the valve seat sealing assembly described above, and further includes a spring member disposed between the valve seat body and the valve body, the spring member being connected to the valve seat body, and the spring member pressing the valve seat body toward the ball side;

[0018] The ball valve further comprises at least one sealing member, which is arranged between the valve seat body and the valve body. Two adjacent sealing members are spaced apart. The sealing member is made of flexible material to form a soft seal between the valve seat body and the valve body.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] 1. In the valve seat sealing assembly described in the present invention, the sealing ring is provided to form a soft seal between the valve seat body and the ball, thereby improving the sealing performance between the valve seat body and the ball.

[0021] 2. The valve seat sealing assembly described in the present invention is provided with the scraper to realize a self-cleaning function, which can effectively scrape off the medium on the surface of the sealing ring and the sphere, thereby increasing the service life of the sealing ring and the sphere.

[0022] 3. The valve seat sealing assembly described in the present invention, wherein the spring member and the sealing member are provided, can effectively improve the sealing performance between the valve seat body, the ball body and the valve body, thereby increasing the service life of the valve seat body, the ball body and the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The invention discloses a valve seat sealing component and a structural diagram of a ball valve using the sealing component.

[0024] Figure 2 The figure is a schematic diagram of the cross-sectional structure of a valve seat sealing component.

[0025] Figure 3 yes Figure 2 Schematic diagram of the structure of A.

[0026] Markings in the figure: 1-valve seat body, 2-sealing ring, 3-installation groove, 4-preset gap, 5-scraper, 6-spring, 7-sealing element, 8-valve seat sealing assembly, 9-ball, 10-valve body. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings.

[0028] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them.

[0029] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0032] In the description of this utility model, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is typically placed when in use, or the orientations or positional relationships commonly understood by those skilled in the art. Such terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" and the like are used solely for distinction and description and should not be construed as indicating or implying relative importance.

[0033] In Example 1: Figures 1 to 3 As shown, a valve seat sealing assembly 8 described in the present invention includes a valve seat body 1 and a ball 9. The outer side of the valve seat body 1 is connected to the valve body 10 of the ball valve, and the inner side of the valve seat body 1 cooperates with the ball 9. The valve seat sealing assembly 8 also includes an annular sealing ring 2, which is arranged between the valve seat body 1 and the ball 9. A mounting groove 3 is provided on the valve seat body 1, and the mounting groove 3 is used to install the sealing ring 2. The sealing ring 2 is kept in contact with the ball 9 and the valve seat body 1 at the same time. The sealing ring 2 is elastic, and a preset gap 4 is further provided in the mounting groove 3. The preset gap 4 is used to provide a deformation space for the sealing ring 2, so that after the sealing ring 2 is installed, under the pressure of the ball 9, part of the sealing ring 2 is compressed into the preset gap 4;

[0034] The valve seat body 1 described in this embodiment forms a hard seal with the ball 9 and the valve body 10. The elastic deformation of the sealing ring 2 can effectively maintain the sealing performance between the ball 9 and the valve seat body 1, so that a soft seal is formed between the ball 9 and the valve seat body 1. At the same time, the elastic deformation of the sealing ring 2 can effectively reduce the wear between the surface of the ball 9 and the surface of the valve seat body 1, further improving the service life of the ball 9 and the valve seat body 1. The mounting groove 3 can effectively reduce the displacement of the sealing ring 2.

[0035] As a preferred embodiment, based on the above method, the ball 9 is further abutted against the valve seat body 1. With this structural arrangement, the contact strength between the sealing ring 2 and the ball 9 is enhanced, making the deformation of the sealing ring 2 more sufficient, further improving the soft sealing cooperation between the ball 9 and the valve seat body 1.

[0036] As a preferred embodiment, based on the above method, a clearance fit is further provided between the ball 9 and the valve seat body 1. With this structural arrangement, when the ball 9 rotates, the clearance between the ball 9 and the valve seat body 1 effectively reduces the frictional resistance between the ball 9 and the valve seat body 1, allowing for compensation space for the sealing ring 2, further extending the service life of the ball 9 and the valve seat body 1.

[0037] As a preferred embodiment, based on the above approach, the sealing ring 2 is further configured as a triangular sealing ring, with a cross-section that is triangular or quasi-triangular, and the cross-section of the mounting groove 3 is a dovetail groove that matches the shape of the sealing ring 2. With this structural arrangement, the triangular shape of the sealing ring 2 allows for effective multi-faceted contact, thereby improving the sealing performance between the ball 9 and the valve seat body 1. The cross-section of the mounting groove 3 matches the shape of the sealing ring 2, effectively reducing the possibility of the sealing ring 2 falling off or shifting.

[0038] As a preferred embodiment, based on the above method, the corners of the sealing ring 2 are further arc-shaped. This structural arrangement can effectively reduce stress concentration on the sealing ring 2 and effectively reduce deformation of the sealing ring 2, thereby increasing the service life of the sealing ring 2.

[0039] As a preferred embodiment, based on the above approach, the preset gap 4 is further provided at the bottom edge of the mounting groove 3 corresponding to the corner area of ​​the sealing ring 2. This structural arrangement effectively ensures orderly deformation of the sealing ring 2 when under pressure, reduces localized excessive compression of the sealing ring 2, and thereby enhances the cushioning effect of the sealing ring 2.

[0040] In Example 2: Figures 1 to 3 As shown, a valve seat sealing assembly 8 described in the present invention, a scraper 5 is further provided between the valve seat body 1 and the ball 9. The scraper 5 is an elastic sheet, one end of the scraper 5 is inserted into the ball 9, and the other end is adapted to the shape of the surface of the ball 9 and abuts against the surface of the ball 9. The scraper 5 is provided on the side of the sealing ring 2 facing the inside of the ball 9;

[0041] The scraper 5 described in this embodiment has a certain rebound performance. One end of the scraper 5 extends and is inserted into the valve group body and fixed, and the other end extends freely to form a surface of the sphere 9. During the rotation of the sphere 9, the surface of the sphere 9 drives the scraper 5 to slide relative to the direction of rotation of the sphere 9. The end of the scraper 5 that abuts the sphere 9 can effectively scrape off impurities deposited on the surface of the sphere 9 due to the medium. The scraper 5 can further improve the sealing performance between the sphere 9 and the valve seat body 1 through structural matching and elastic setting, thereby increasing the service life of the sphere 9 and the valve seat body 1.

[0042] As a preferred embodiment, based on the above method, the scraper blade 5 further abuts the sealing ring 2, and the end of the scraper blade 5 located within the sphere 9 is serrated with a plurality of grooves. This structural arrangement can effectively improve the cleaning ability of the scraper blade 5 and further enhance the stability and wear resistance of the scraper blade 5.

[0043] In Example 3: Figures 1 to 3 As shown, the utility model describes a ball valve using a valve seat sealing assembly 8, including the valve seat sealing assembly 8 described above, and the ball valve further includes a spring member 6, the spring member 6 is arranged between the valve seat body 1 and the valve body 10, the spring member 6 is connected to the valve seat body 1, and the spring member 6 presses the valve seat body 1 toward the side of the ball 9;

[0044] The ball valve further includes at least one sealing member 7 , which is disposed between the valve seat body 1 and the valve body 10 . Two adjacent sealing members 7 are spaced apart from each other. The sealing member 7 is made of a flexible material to form a soft seal between the valve seat body 1 and the valve body 10 .

[0045] The spring member 6 described in this embodiment can effectively provide a pre-tightening force between the valve seat body 1 and the valve body 10, and the sealing member 7 can effectively form a soft sealing fit between the valve seat body 1 and the valve body 10, further improving the service life of the valve seat body 1 and the valve body 10.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A valve seat sealing assembly, comprising a valve seat body and a ball, wherein the outer side of the valve seat body is connected to the valve body of a ball valve, and the inner side of the valve seat body is matched with the ball, characterized in that: The valve seat sealing assembly further comprises an annular sealing ring, which is arranged between the valve seat body and the ball. A mounting groove is provided on the valve seat body for mounting the sealing ring. The sealing ring is in contact with the ball and the valve seat body at the same time. The sealing ring is elastic and a preset gap is provided in the installation groove. The preset gap is used to provide deformation space for the sealing ring so that after the sealing ring is installed, part of the sealing ring is compressed into the preset gap under the pressure of the ball.

2. A valve seat sealing assembly according to claim 1, characterized in that: The ball is in contact with the valve seat body.

3. The valve seat sealing assembly according to claim 1, characterized in that: There is a clearance fit between the sphere and the valve seat body.

4. A valve seat sealing assembly according to any one of claims 1 to 3, characterized in that: The sealing ring is a triangular sealing ring, the cross section of the sealing ring is triangular or quasi-triangular, and the cross section of the mounting groove is a dovetail groove that matches the shape of the sealing ring.

5. The valve seat sealing assembly according to claim 4, characterized in that: The corner position of the sealing ring is in an arc shape.

6. The valve seat sealing assembly according to claim 5, characterized in that: The preset gap is set at a bottom edge position of the installation groove corresponding to the corner area of ​​the sealing ring.

7. The valve seat sealing assembly according to claim 6, characterized in that: A scraper is also provided between the valve seat body and the sphere. The scraper is an elastic sheet. One end of the scraper is inserted into the sphere, and the other end is adapted to the shape of the surface of the sphere and abuts against the surface of the sphere. The scraper is provided on the side of the sealing ring facing the inside of the sphere.

8. The valve seat sealing assembly according to claim 7, characterized in that: The scraper is in contact with the sealing ring, and the end of the scraper located inside the sphere is in a sawtooth shape with a plurality of grooves.

9. A ball valve, characterized in that: comprising the valve seat sealing assembly according to any one of claims 1 to 8, The ball valve further includes a spring member, which is disposed between the valve seat body and the valve body, and is connected to the valve seat body, and the spring member presses the valve seat body toward the ball side; The ball valve further comprises at least one sealing member, which is arranged between the valve seat body and the valve body. Two adjacent sealing members are spaced apart. The sealing member is made of flexible material to form a soft seal between the valve seat body and the valve body.

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