Ball valve

Abstract

The utility model relates to the technical field of valves, and discloses a ball valve which comprises a valve body, a ball body, a valve seat and a scraper assembly. The ball body is rotationally arranged in the mounting cavity and provided with a ball body sealing surface, the valve seat is arranged on the valve body and provided with a valve seat sealing surface matched with the ball body sealing surface, and the valve seat sealing surface is suitable for abutting against the ball body sealing surface; the scraper assembly is arranged between the ball and the valve body, and the scraping end of the scraper assembly is configured to abut against the ball sealing face so that the scraping end of the scraper assembly can be suitable for scraping and sweeping the ball sealing face of the ball when the ball rotates in the installation cavity. According to the ball valve, the situations that the ball body sealing face and the valve seat sealing face are damaged and the service life of the ball body and the valve seat is shortened due to the fact that foreign matter in media scratches the ball body sealing face and the valve seat sealing face when the ball body rotates can be avoided, and the service life of the ball body and the service life of the valve seat are prolonged.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to ball valves. Background Technology

[0002] Ball valves are suitable for use in pipelines transporting various corrosive and non-corrosive fluid media in engineering systems such as petroleum, chemical, hydropower, water supply and drainage, metallurgy, and energy, for the regulation and control of fluids.

[0003] In existing technologies, during the construction and operation of oil and gas pipelines, sand particles, mud mixtures, coking slag, and rust particles can accumulate in the pipelines, often affecting the sealing performance of valves. In addition, sudden reductions in fluid velocity within the pipeline can leave foreign particles in the valve cavity gaps. These foreign particles can easily enter the ball seat sealing surface when the valve is opened and closed, damaging the ball and valve seat and reducing their service life. Utility Model Content

[0004] In view of this, the present invention provides a ball valve to solve the problem that foreign particles in the medium can easily damage the ball and valve seat when the valve is opened and closed, thereby reducing the service life of the ball and valve seat.

[0005] In a first aspect, this utility model provides a ball valve, comprising:

[0006] Valve body, the valve body having a mounting cavity;

[0007] A ball and a valve seat, wherein the ball is rotatably disposed within the mounting cavity and has a ball sealing surface, and the valve seat is disposed on the valve body and has a valve seat sealing surface that mates with the ball sealing surface, and the valve seat sealing surface is adapted to abut against the ball sealing surface;

[0008] A scraper assembly is disposed between the ball and the valve body, wherein the scraping end of the scraper assembly is configured to abut against the sealing surface of the ball, so that when the ball rotates within the mounting cavity, the scraping end of the scraper assembly is adapted to scrape the sealing surface of the ball.

[0009] Beneficial effects: By setting the ball, valve seat and scraper assembly in the valve body, wherein the valve body has a mounting cavity, the ball is rotatably arranged in the mounting cavity, and the ball has a ball sealing surface, the valve seat is arranged on the valve body, and the valve seat has a valve seat sealing surface matched with the ball sealing surface, the valve seat sealing surface can abut against the ball sealing surface to achieve the sealing of the mounting cavity, and the scraper assembly is arranged between the ball and the valve body, and the scraping end of the scraper assembly is configured to abut against the ball sealing surface, so that when the ball rotates in the mounting cavity, the scraping end of the scraper assembly can sweep the ball sealing surface of the ball, thereby scraping off the foreign matter adhered to the ball sealing surface, avoiding the situation that the foreign matter scratches the ball sealing surface and the valve seat sealing surface when the ball rotates, causing damage to the ball sealing surface and the valve seat sealing surface, and reducing the service life of the ball and the valve seat. Therefore, the setting of the scraper assembly is beneficial to improving the service life of the ball and the valve seat.

[0010] In an alternative embodiment, the scraper assembly comprises a scraper and a biasing member, the scraper is arranged between the valve body and the ball, and the biasing member is arranged between the scraper and the valve body, and the biasing member is configured to have a spring force driving the scraping end of the scraper to move towards the ball sealing surface, so that the scraping end of the scraper abuts against the ball sealing surface.

[0011] Beneficial effects: By setting the scraper assembly comprising a scraper and a biasing member, the biasing member is a spring in this embodiment, wherein the scraper is arranged between the valve body and the ball, and the biasing member is arranged between the scraper and the valve body, and the biasing member is configured to have a spring force driving the scraping end of the scraper to move towards the ball sealing surface, so that under the action of the spring force, the scraping end of the scraper can abut against the ball sealing surface of the ball, and thereby the scraping end of the scraper can sweep the adhered foreign matter on the ball sealing surface when the ball rotates.

[0012] In an alternative embodiment, a plurality of drainage portions are formed on the scraper, and when the scraping end of the scraper sweeps the ball sealing surface of the ball, part of the drainage portions are adapted to circulate air, and another part of the drainage portions are adapted to drain foreign matter.

[0013] Beneficial effects: By forming a plurality of drainage portions on the scraper, the drainage portions are drainage holes in this embodiment, and since the scraper is arranged between the valve body and the ball, the ball sealing surface is divided into two parts from the part abutting against the scraper, therefore, the space where the ball sealing surface is divided into two parts can be communicated through the drainage portions, so that when the scraping end of the scraper sweeps the ball sealing surface of the ball, part of the drainage portions can circulate air to ensure the stability of the air pressure in the mounting cavity, and another part of the drainage portions can circulate the foreign matter swept down by the scraping end of the scraper to ensure that the foreign matter can be drained out of the mounting cavity.

[0014] In an alternative implementation, a limiting assembly is further included, which comprises a limiting member and a connecting member, the connecting member is connected with the valve body, and the limiting member is arranged between the connecting member and the valve body, and part of the limiting member is in abutment with the scraper to limit the scraper.

[0015] Beneficial effects: By arranging the limiting assembly on the valve body, the limiting assembly specifically comprises a limiting member and a connecting member, which are a gasket and a screw in this embodiment. The connecting member is connectable with the valve body, and the limiting member is arranged between the connecting member and the valve body, and part of the limiting member is in abutment with the scraper to limit the scraper, thereby avoiding the scraper from scratching the sealing surface of the ball under the action of the biasing member.

[0016] In an alternative implementation, a connecting portion is formed on the valve body, and the connecting member is adapted to be connected with the connecting portion to be connected with the valve body.

[0017] Beneficial effects: By forming the connecting portion on the valve body, which is a connecting threaded hole in this embodiment, the connecting member is connectable with the connecting portion to be connected with the valve body, thereby enabling the connecting member to fix the limiting member between the connecting member and the valve body.

[0018] In an alternative implementation, a medium channel for medium flow is formed on the valve body, and a communicating portion is formed on the ball, and under the action of an external force, the ball is adapted to rotate in the mounting cavity to make the communicating portion communicate with or be cut off from the medium channel.

[0019] Beneficial effects: By forming the medium channel on the valve body and the communicating portion on the ball, which is a communicating hole in this embodiment, the medium channel is adapted to allow medium flow, and the ball is adapted to rotate in the mounting cavity under the action of an external force, thereby enabling the communicating portion to communicate with or be cut off from the medium channel, and further enabling the medium to flow normally or be cut off.

[0020] In an alternative implementation, a giving portion is formed on the valve seat, and a plurality of flow guiding portions are formed on the ball in communication with the communicating portion and the giving portion, and the flow guiding portions are formed on the sealing surface of the ball.

[0021] Beneficial effects: By forming the giving portion on the valve seat and the plurality of flow guiding portions on the ball, which are a giving slot and a flow guiding hole in this embodiment, the two ends of each flow guiding portion are adapted to communicate with the communicating portion and the giving portion, thereby enabling the medium flowing in the medium channel to flow into the flow guiding portion through the giving portion, and further enabling the medium to flow into the communicating portion through the flow guiding portion and continue to flow in the communicating portion. In this way, the medium can be used to flush the abutment portion between the ball and the valve seat, thereby avoiding the accumulation of foreign matters in the medium at the abutment portion between the ball and the valve seat.

[0022] In an alternative embodiment, the displacement part is a displacement slot, and an inner wall surface of the displacement slot is an arc surface.

[0023] Beneficial effects: by setting the displacement part as a displacement slot and setting the inner wall surface of the displacement slot as an arc surface, the arc-shaped inner wall surface of the displacement part can provide a guiding effect for the medium when the medium flows into the flow guide part through the displacement part, thereby accelerating the flow rate of the medium, so that the medium can be avoided to be left at the abutting part of the valve seat of the ball.

[0024] In an alternative embodiment, a plurality of sealing members are further included, and any one of the sealing members is arranged between the valve seat and the valve body to seal the gap between the valve seat and the valve body.

[0025] Beneficial effects: by setting a plurality of sealing members between the valve seat and the valve body, any one of the sealing members is a sealing ring in this embodiment, and each sealing member is arranged between the valve body and the valve seat to seal the gap between the valve seat and the valve body, thereby avoiding leakage of the medium.

[0026] In an alternative embodiment, a support member is further included, and the support member is arranged between the ball and the valve body to fix and support the ball.

[0027] Beneficial effects: by setting a support member between the ball and the valve body, the support member is a support ring in this embodiment, and when the ball is installed in the installation cavity, the support member can be connected with the ball to provide a fixing and supporting effect for the ball, thereby avoiding shaking of the ball in the installation cavity. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 is a cross-sectional view of a ball valve according to an embodiment of the present application;

[0030] Figure 2 is a partial cross-sectional view of a ball valve according to an embodiment of the present application.

[0031] EXPLANATION OF REFERENCE NUMERALS:

[0032] 1-valve body; 11-medium passage;

[0033] 2 - ball; 21 - communicating part; 22 - flow guiding part; 3 - valve seat; 31 - let go part;

[0034] 4 - scraper assembly; 41 - scraper; 411 - discharge part; 42 - biasing member;

[0035] 5 - limiting assembly; 51 - limiting member; 52 - connecting member;

[0036] 6 - sealing member; 7 - supporting member. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] The embodiments of the present application will be described below in conjunction with Figure 1 and Figure 2 .

[0039] According to the embodiments of the present application, on the one hand, a ball valve is provided, as shown in Figure 1 and Figure 2 , comprising a valve body 1, a ball 2, a valve seat 3 and a scraper assembly 4, the valve body 1 has a mounting cavity; the ball 2 is rotationally arranged in the mounting cavity, the ball 2 has a ball 2 sealing surface, the valve seat 3 is arranged on the valve body 1, the valve seat 3 has a valve seat 3 sealing surface matched with the ball 2 sealing surface, the valve seat 3 sealing surface is adapted to abut against the ball 2 sealing surface; the scraper assembly 4 is arranged between the ball 2 and the valve body 1, the scraping end of the scraper assembly 4 is configured to abut against the ball 2 sealing surface, so that when the ball 2 rotates in the mounting cavity, the scraping end of the scraper assembly 4 is adapted to sweep the ball 2 sealing surface of the ball 2.

[0040] The ball valve with the above structure is provided with the ball 2, the valve seat 3 and the scraper assembly 4 arranged in the valve body 1, wherein the valve body 1 has a mounting cavity, the ball 2 is arranged in the mounting cavity in a rotating mode, the ball 2 has a ball 2 sealing surface, the valve seat 3 is arranged on the valve body 1 and has a valve seat 3 sealing surface matched with the ball 2 sealing surface, the valve seat 3 sealing surface can abut against the ball 2 sealing surface to seal the mounting cavity, the scraper assembly 4 is arranged between the ball 2 and the valve body 1, and the scraping end of the scraper assembly 4 is configured to abut against the ball 2 sealing surface, so that the scraping end of the scraper assembly 4 can scrape the ball 2 sealing surface of the ball 2 when the ball 2 rotates in the mounting cavity, thereby scraping off the foreign matters adhered to the ball 2 sealing surface, avoiding the foreign matters scratching the ball 2 sealing surface and the valve seat 3 sealing surface when the ball 2 rotates, which can cause damage to the ball 2 sealing surface and the valve seat 3 sealing surface and reduce the service life of the ball 2 and the valve seat 3, and therefore, the arrangement of the scraper assembly 4 is beneficial to improving the service life of the ball 2 and the valve seat 3.

[0041] In one embodiment, as shown in Figure 2 The scraper assembly 4 includes the scraper 41 and the biasing member 42, the scraper 41 is arranged between the valve body 1 and the ball 2, and the biasing member 42 is arranged between the scraper 41 and the valve body 1, and the biasing member 42 is configured to have an elastic force to drive the scraping end of the scraper 41 to move towards the ball 2 sealing surface, so that the scraping end of the scraper 41 abuts against the ball 2 sealing surface.

[0042] The ball valve with the above structure is provided with the scraper assembly 4 including the scraper 41 and the biasing member 42, the biasing member 42 is a spring in the embodiment, wherein the scraper 41 is arranged between the valve body 1 and the ball 2, and the biasing member 42 is arranged between the scraper 41 and the valve body 1, and the biasing member 42 is configured to have an elastic force to drive the scraping end of the scraper 41 to move towards the ball 2 sealing surface, so that the scraping end of the scraper 41 can abut against the ball 2 sealing surface of the ball 2 under the action of the elastic force, and thereby the scraping end of the scraper 41 can scrape the foreign matters adhered to the ball 2 sealing surface when the ball 2 rotates.

[0043] Specifically, the scraper 41 is annular as a whole, so that the scraping end of the scraper 41 can cover the entire ball 2 sealing surface when the scraper 41 abuts against the ball 2 sealing surface, and thereby the scraping end of the scraper 41 can scrape the entire ball 2 sealing surface when the ball 2 rotates, so as to avoid that the foreign matters are left on part of the ball 2 sealing surface.

[0044] In one embodiment, as shown in Figure 2 The scraper 41 is provided with a plurality of drainage portions 411, and part of the drainage portions 411 are adapted to circulate air and the other part of the drainage portions 411 are adapted to drain the foreign matters when the scraping end of the scraper 41 scrapes the ball 2 sealing surface of the ball 2.

[0045] The ball valve with the above structure can communicate the space of the two parts of the sealing surface of the ball body 2 through the several exhaust portions 411 on the scraper 41, which are exhaust holes in this embodiment. Since the scraper 41 is arranged between the valve body 1 and the ball body 2, the sealing surface of the ball body 2 is divided into two parts by the scraper 41 from the part abutting against the scraper 41. Therefore, the space of the two parts of the sealing surface of the ball body 2 can be communicated through the exhaust portions 411. When the scraping end of the scraper 41 scrapes the sealing surface of the ball body 2, one part of the exhaust portions 411 can flow air to ensure the stability of the air pressure in the mounting cavity, and the other part of the exhaust portions 411 can flow the foreign matters scraped by the scraping end of the scraper 41 to ensure that the foreign matters can be exhausted out of the mounting cavity.

[0046] Specifically, the exhaust portions 411 are arranged at the 3 o'clock, 6 o'clock, 9 o'clock and 12 o'clock positions of the scraper 41. The exhaust portions 411 at the 3 o'clock and 9 o'clock positions are used for flowing air, and the exhaust portions 411 at the 6 o'clock and 12 o'clock positions are used for exhausting foreign matters. This is because the foreign matter exhaust openings arranged on the valve body 1 are located at the 6 o'clock and 12 o'clock positions. Thus, the scraped foreign matters can be directly exhausted to the outside through the exhaust openings on the valve body 1.

[0047] In one embodiment, as shown in Figure 2 the limiting assembly 5 is further arranged on the valve body 1. The limiting assembly 5 includes a limiting piece 51 and a connecting piece 52. The connecting piece 52 is connected with the valve body 1, and the limiting piece 51 is arranged between the connecting piece 52 and the valve body 1. Part of the limiting piece 51 abuts against the scraper 41 to limit the scraper 41.

[0048] The ball valve with the above structure can limit the scraper 41 through the limiting assembly 5 arranged on the valve body 1. The limiting assembly 5 specifically includes a limiting piece 51 and a connecting piece 52. The limiting piece 51 and the connecting piece 52 are a gasket and a screw in this embodiment. The connecting piece 52 can be connected with the valve body 1, and the limiting piece 51 is arranged between the connecting piece 52 and the valve body 1. Part of the limiting piece 51 abuts against the scraper 41 to limit the scraper 41, so that the scraper 41 cannot scratch the sealing surface of the ball body 2 under the action of the biasing piece 42.

[0049] In one embodiment, as shown in Figure 2 the valve body 1 is provided with a connecting portion. The connecting piece 52 is adapted to be connected with the connecting portion to be connected with the valve body 1.

[0050] The ball valve with the above structure can be connected with the valve body 1 through the connecting portion arranged on the valve body 1. The connecting portion is a connecting threaded hole in this embodiment. The connecting piece 52 can be connected with the connecting portion, so that the connecting piece 52 can fix the limiting piece 51 between the connecting piece 52 and the valve body 1.

[0051] In one embodiment, as shown in Figure 1 and Figure 2As shown, the valve body 1 is provided with a medium passage 11 for medium flow, and the ball 2 is provided with a communication part 21, which is adapted to rotate in the installation cavity under the action of external force to make the communication part 21 communicate with or cut off the medium passage 11.

[0052] The ball valve with the above structure can make the medium flow through the medium passage 11 provided on the valve body 1 and the communication part 21 provided on the ball 2, and the communication part 21 is a communication hole in this embodiment, wherein the medium passage 11 can be used for medium flow, and the ball 2 can rotate in the installation cavity under the action of external force, so that the communication part 21 can communicate with or cut off the medium passage 11, and thus the medium can flow normally or be cut off.

[0053] In one embodiment, as shown in the drawings, Figure 2 The valve seat 3 is provided with a giving part 31, and the ball 2 is provided with a plurality of flow guiding parts 22 which are in communication with the communication part 21 and the giving part 31, and the flow guiding part 22 is provided on the sealing surface of the ball 2.

[0054] The ball valve with the above structure can make the medium flow through the medium passage 11 provided on the valve body 1 and the communication part 21 provided on the ball 2, and the communication part 21 is a communication hole in this embodiment, wherein the medium passage 11 can be used for medium flow, and the ball 2 can rotate in the installation cavity under the action of external force, so that the communication part 21 can communicate with or cut off the medium passage 11, and thus the medium can flow normally or be cut off.

[0055] In one embodiment, as shown in the drawings, Figure 2 The giving part 31 is a giving groove, and the inner wall surface of the giving groove is an arc surface.

[0056] The ball valve with the above structure can make the medium flow through the medium passage 11 provided on the valve body 1 and the communication part 21 provided on the ball 2, and the communication part 21 is a communication hole in this embodiment, wherein the medium passage 11 can be used for medium flow, and the ball 2 can rotate in the installation cavity under the action of external force, so that the communication part 21 can communicate with or cut off the medium passage 11, and thus the medium can flow normally or be cut off.

[0057] In one embodiment, as shown in the drawings, Figure 2 It also includes a plurality of sealing members 6, and any sealing member 6 is arranged between the valve seat 3 and the valve body 1 to seal the gap between the valve seat 3 and the valve body 1.

[0058] The ball valve with the above structure can seal the gap between the valve seat 3 and the valve body 1 through the sealing pieces 6 arranged between the valve seat 3 and the valve body 1, and each sealing piece 6 is a sealing ring in the embodiment, thereby avoiding the medium leakage.

[0059] In one embodiment, as shown in Figure 2 The support 7 is arranged between the ball body 2 and the valve body 1 to fix and support the ball body 2.

[0060] The ball valve with the above structure can seal the gap between the valve seat 3 and the valve body 1 through the sealing pieces 6 arranged between the valve seat 3 and the valve body 1, and each sealing piece 6 is a sealing ring in the embodiment, thereby avoiding the medium leakage.

[0061] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes are intended to fall within the scope of the appended claims.

Claims

1. A ball valve, characterized in that The utility model relates to a valve, comprising: a valve body (1) having a mounting cavity; a ball (2) rotatably arranged in the mounting cavity, the ball (2) having a ball (2) sealing surface, and a valve seat (3) arranged on the valve body (1), the valve seat (3) having a valve seat (3) sealing surface matched with the ball (2) sealing surface, the valve seat (3) sealing surface being adapted to abut against the ball (2) sealing surface; a scraper assembly (4) arranged between the ball (2) and the valve body (1), a scraping end of the scraper assembly (4) being configured to abut against the ball (2) sealing surface, so that the scraping end of the scraper assembly (4) is adapted to sweep the ball (2) sealing surface of the ball (2) when the ball (2) rotates in the mounting cavity.

2. The ball valve according to claim 1, characterized in that The scraper assembly (4) comprises a scraper (41) arranged between the valve body (1) and the ball (2), and a biasing member (42) arranged between the scraper (41) and the valve body (1), the biasing member (42) being configured to have an elastic force to drive the scraping end of the scraper (41) to move towards the ball (2) sealing surface, so that the scraping end of the scraper (41) abuts against the ball (2) sealing surface.

3. The ball valve of claim 2, wherein, The scraper (41) is provided with a plurality of drainage portions (411), and when the scraping end of the scraper (41) sweeps the ball (2) sealing surface, part of the drainage portions (411) are adapted to circulate air, and the other part of the drainage portions (411) are adapted to drain foreign matters.

4. The ball valve according to claim 3, characterized in that Further comprising a limiting assembly (5) comprising a limiting member (51) and a connecting member (52), the connecting member (52) being connected with the valve body (1), and the limiting member (51) being arranged between the connecting member (52) and the valve body (1), part of the limiting member (51) abutting against the scraper (41) to limit the scraper (41).

5. The ball valve of claim 4, wherein, The valve body (1) is provided with a connecting portion, and the connecting member (52) is adapted to be connected with the connecting portion to be connected with the valve body (1).

6. Ball valve according to any of claims 1-5, characterized in that The valve body (1) is provided with a medium channel (11) for medium circulation, and the ball (2) is provided with a communication portion (21), and under the action of external force, the ball (2) is adapted to rotate in the mounting cavity to make the communication portion (21) communicate with or cut off the medium channel (11).

7. The ball valve according to claim 6, characterized in that The valve seat (3) is provided with a giving-up portion (31), and the ball (2) is provided with a plurality of flow guide portions (22) communicated with the communication portion (21) and the giving-up portion (31), the flow guide portions (22) being arranged on the ball (2) sealing surface.

8. The ball valve of claim 7, wherein, The giving-up portion (31) is a giving-up groove, and the inner wall surface of the giving-up groove is an arc surface.

9. The ball valve of claim 8, wherein, Further comprising a plurality of sealing members (6), any one of the sealing members (6) being arranged between the valve seat (3) and the valve body (1) to seal the gap between the valve seat (3) and the valve body (1).

10. The ball valve of claim 9, wherein, It also comprises a support (7) arranged between the ball (2) and the valve body (1) to fix and support the ball (2).

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