gate valve

Abstract

This application relates to the field of valve technology, and in particular to a gate valve. The gate valve includes a valve body, a fixed seat, a valve core, and a lubrication section. The valve body has a valve cavity with an axial orientation. The fixed seat is installed within the valve cavity. The fixed seat has a flow hole that extends axially through the fixed seat. The valve core is installed within the valve cavity and abuts against the surface of the fixed seat. The valve core has a sealing section with a first state and a second state. In the first state, the sealing section at least structurally blocks and seals the flow hole. In the second state, the sealing section and the flow hole are spaced apart. The valve core can rotate around its own axis to switch between the first and second states. The lubrication section contains a lubrication groove for lubricating medium. Along the axial direction, at least one of the sealing section and the fixed seat has a lubrication section on its end face facing the other. The lubricating medium in the lubrication section is located between the sealing section and the fixed seat as the valve core rotates, reducing friction and filling the gap between the valve core and the fixed seat, thus enhancing sealing.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a shut-off valve. Background Technology

[0002] As a key component in refrigeration systems for controlling fluid flow, the reliability of gate valves directly impacts pipeline safety. Technicians are aware that gate valves employ a design where the valve core and seat rotate and adhere to each other to achieve sealing and opening / closing. When the valve stem drives the valve core to rotate, sliding friction occurs between the valve core's sealing surface and the valve seat's sealing surface to complete the opening and closing action. While this achieves a good initial sealing effect, over long-term use, the direct friction between the valve core and seat during repeated opening and closing causes wear on the sealing surfaces, affecting the sealing effect and leading to leakage. Utility Model Content

[0003] Therefore, it is necessary to provide a shut-off valve to reduce wear on the sealing surface.

[0004] A shut-off valve includes a valve body, a fixed seat, a valve core, and a lubrication part. The valve body has an internal valve cavity with an axial direction. The fixed seat is installed within the valve cavity. The fixed seat has a flow hole that extends through the fixed seat along the axial direction. The valve core is installed within the valve cavity and includes a blocking portion that abuts against the surface of the fixed seat. The valve core is rotatable about its own axis to switch between a first state and a second state. In the first state, the blocking portion at least partially blocks and seals the flow hole. In the second state, the blocking portion is spaced apart from the flow hole. The valve core is rotatable about its own axis to switch between the first state and the second state to open or block the flow hole. Along the axial direction, at least one of the blocking portion and the fixed seat has a lubrication part on its end face facing the other. The lubrication part has a lubrication groove that contains a lubricating medium, which is positioned between the blocking portion and the fixed seat as the valve core rotates.

[0005] It is understood that by providing the lubrication part on the end face of at least one of the sealing part and the fixed seat facing the other, and the lubrication part having a lubrication groove filled with a lubricating medium, the lubricating medium can be applied to the surface between the valve core and the fixed seat when the valve core rotates relative to the fixed seat, thereby reducing the friction between the valve core and the fixed seat, making the surfaces of the valve core and the fixed seat less prone to wear, extending the service life, and filling the gap between the valve core and the fixed seat, thereby enhancing the sealing performance between the valve core and the fixed seat.

[0006] In one embodiment, at least two flow holes are provided, and the at least two flow holes are spaced apart; the valve core is provided with at least two sealing parts, and the at least two sealing parts are connected; in the first state, each sealing part at least partially blocks and seals a corresponding flow hole; wherein, a lubrication part is provided between at least two flow holes.

[0007] In one embodiment, at least two of the flow holes are disposed on both sides of the lubrication part along a first direction, and the lubrication groove extends along a second direction in the lubrication part; the first direction and the second direction are at an angle, and the first direction and the second direction are respectively perpendicular to the axial direction.

[0008] In one embodiment, a plurality of flow holes are evenly distributed circumferentially along the valve core, and there is a symmetrical axis between any two adjacent flow holes. The two adjacent flow holes are symmetrically arranged about the symmetrical axis. A lubrication part is provided between any two adjacent flow holes, and each lubrication part is provided with a plurality of lubrication grooves spaced apart.

[0009] In one embodiment, at least one of the lubrication grooves extends along the direction of the axis of symmetry; at least two of the lubrication grooves are located on opposite sides of the axis of symmetry.

[0010] In one embodiment, the area of ​​the fixing seat between any two adjacent flow holes gradually expands radially outward along the fixing seat; the angle between the lubrication groove and the axis of symmetry is α; the angle α gradually increases between any two adjacent flow holes in the direction outward along the axis of symmetry and from the axis of the valve cavity; and / or, the number of lubrication grooves gradually increases between any two adjacent flow holes in the direction outward along the axis of symmetry and from the axis of the valve cavity.

[0011] In one embodiment, the lubrication part is provided with a plurality of lubrication grooves; the plurality of lubrication grooves are spaced apart along the circumference of the valve core; and / or, the plurality of lubrication grooves are staggered along the radial direction of the valve core; or, the plurality of lubrication grooves are spaced apart along the radial direction of the valve core; and / or, the plurality of lubrication grooves are staggered along the circumference of the valve core.

[0012] In one embodiment, the lubrication groove extends radially along the valve core to form an elongated structure.

[0013] In one embodiment, along the length of the lubrication groove, at least one side of the groove wall is configured as an arcuate surface.

[0014] In one embodiment, the flow hole gradually increases outward along the circumferential dimension of the fixed seat along the radial direction of the fixed seat. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A cross-sectional view of the shut-off valve provided in this application;

[0017] Figure 2 A perspective view of one embodiment of the fixed seat in the shut-off valve provided in this application;

[0018] Figure 3 A top view of one embodiment of the fixed seat in the shut-off valve provided in this application;

[0019] Figure 4 A perspective view of another embodiment of the fixed seat in the shut-off valve provided in this application;

[0020] Figure 5 This is a top view of another embodiment of the fixed seat in the shut-off valve provided in this application.

[0021] Reference numerals: 100, gate valve; 10, valve body; 101, valve cavity; 102, first flow port; 103, second flow port; 20, fixed seat; 201, flow hole; 202, axis of symmetry; 30, valve core; 31, sealing part; 40, lubrication part; 41, lubrication groove; 50, valve stem assembly. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0023] It should be noted that when a component is referred to as being "fixed to," "set on," or "properly placed on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0027] Please see Figures 1 to 5This application provides a shut-off valve 100, which includes a valve body 10, a fixed seat 20, and a valve core 30. The valve body 10 has a valve cavity 101 inside, and the valve cavity 101 has an axial direction. The fixed seat 20 and the valve core 30 are respectively installed in the valve cavity 101. The fixed seat 20 has a flow hole 201, which passes through the fixed seat 20 axially. The valve core 30 includes a blocking part 31, which abuts against the surface of the fixed seat 20. The blocking part 31 has a first state and a second state. In the first state, the blocking part 31 at least partially blocks and seals the flow hole 201. In the second state, the blocking part 31 and the flow hole 201 are spaced apart. The valve core 30 can rotate around its own axis to switch between the first state and the second state.

[0028] Thus, the switching between opening and closing of the shut-off valve 100 can be achieved simply by rotating the valve core 30, making operation convenient. When it is necessary to open the shut-off valve 100, rotating the valve core 30 removes the obstruction and blockage of the flow hole 201 by the blocking part 31, allowing the flow hole 201 to connect with the valve chamber 101, thereby achieving fluid communication. When it is necessary to close the shut-off valve 100, rotating the valve core 30 causes the blocking part 31 to block the flow hole 201, thereby disconnecting the flow hole 201 from the valve chamber 101, achieving fluid disconnection. Simultaneously, the angle of rotation of the valve core 30 can control the area of ​​obstruction of the flow hole 201 by the blocking part 31, thereby controlling the degree of opening of the flow hole 201 and thus controlling the fluid flow rate.

[0029] like Figures 2 to 5 As shown, the shut-off valve 100 further includes a lubrication section 40, which has a lubrication groove 41 containing a lubricating medium. Specifically, along the axial direction, at least one of the sealing section 31 and the fixed seat 20 has the lubrication section 40 on its end face facing the other. The lubricating medium in the lubrication section 40 is located between the sealing section 31 and the fixed seat 20 as the valve core 30 rotates, thereby reducing friction between the valve core 30 and the fixed seat 20, reducing wear on the surfaces of the valve core 30 and the fixed seat 20, and making the shut-off valve 100 less prone to sealing failure due to wear of the valve core 30 and the fixed seat 20, ensuring sealing performance. Simultaneously, it also helps extend service life, reduce replacement frequency, and lower production costs.

[0030] In summary, the lubrication section 40 reduces friction between the valve core 30 and the valve seat, thereby reducing wear, ensuring sealing performance, and extending service life.

[0031] like Figure 1 As shown, in a specific embodiment, the shut-off valve 100 includes a valve stem assembly 50, which is connected to the valve core 30. The valve stem assembly 50 drives the rotation of the valve core 30. The valve stem assembly 50 can be connected to a motor for motor-controlled rotation, or it can be manually controlled for rotation.

[0032] like Figure 1 As shown, in a specific embodiment, the valve body 10 is provided with a first flow port 102 and a second flow port 103 communicating with the valve cavity 101. Valve pipes are respectively connected to the first flow port 102 and the second flow port 103 to realize fluid transportation. The on / off state between the first flow port 102 and the second flow port 103 can be switched by rotating the valve core 30.

[0033] like Figures 2 to 4 As shown, in an optional embodiment, at least two flow holes 201 are provided, and the at least two flow holes 201 are spaced apart, wherein a lubrication portion 40 is provided between the at least two flow holes 201. Thus, at least between the two flow holes 201, the valve core 30 can uniformly apply the lubricating medium by rotating itself.

[0034] like Figure 1 As shown, the valve core 30 further includes at least two sealing portions 31 connected together. In the first state, each sealing portion 31 at least partially blocks and seals a corresponding flow hole 201. The valve core 30 can be rotated to allow the sealing portions 31 to block the flow hole 201, or it can be rotated to remove the blocking and sealing of the flow hole 201.

[0035] In a specific embodiment, the valve core 30 includes a blocking block, which forms a blocking part 31 for blocking the flow hole 201. The structure is simple and easy to manufacture. When at least two blocking blocks are provided, the at least two blocking blocks are connected and each forms a blocking part 31.

[0036] In specific embodiments, along the axial direction, the surface of the sealing portion 31 facing the fixing seat 20 is provided with a lubrication portion 40, and the surface of the sealing portion 31 is recessed inward to form a lubrication groove 41; or, along the axial direction, the surface of the fixing seat 20 facing the sealing portion 31 is provided with a lubrication portion 40, and the surface of the fixing seat 20 is recessed inward to form a lubrication groove 41, which can avoid the flow hole 201 and reduce the leakage of lubricating medium; or, along the axial direction, the surface of the sealing portion 31 facing the fixing seat 20 is provided with a lubrication portion 40, and the surface of the fixing seat 20 facing the sealing portion 31 is also provided with a lubrication portion 40, which is conducive to accommodating more lubricating medium, promoting the uniform application of lubricating medium, and enhancing the lubrication effect. In this application, for ease of explanation, the example of the fixing seat 20 being provided with a lubrication portion 40 is mainly used for illustration.

[0037] In specific embodiments, the lubricating medium can be lubricating oil, lubricant, or lubricating paste, etc.

[0038] like Figures 2 to 4As shown, in an optional embodiment, the flow hole 201 gradually increases in size outwards along the radial direction of the fixing seat 20 and the circumferential direction of the fixing seat 20, which is beneficial to increasing the fluid flow area and improving the flow performance. In a specific embodiment, the flow hole 201 is configured as a fan-shaped hole.

[0039] In other embodiments, the flow hole 201 can also be configured as a circular hole, which is easy to process.

[0040] like Figure 3 As shown, in one embodiment, at least two flow holes 201 are respectively disposed on both sides of the lubrication section 40 along a first direction, and a lubrication groove 41 extends along a second direction in the lubrication section 40; the first direction and the second direction are at an angle, and the first direction and the second direction are respectively perpendicular to the axial direction. In this way, a lubrication section 40 is provided on the surface between at least two flow holes 201, and when the valve core 30 rotates, the lubricating medium can be evenly applied from the lubrication section 40 toward the flow holes 201 on both sides.

[0041] In a specific embodiment, there are two flow holes 201. The two flow holes 201 are respectively disposed on both sides of the lubrication part 40 along the first direction. The lubrication groove 41 extends along the second direction. The valve core 30 can fully apply the lubricating medium in the lubrication groove 41 to the surface of the area between the two flow holes 201.

[0042] In a specific embodiment, the length of the lubrication groove 41 extending along the second direction is L1, and the length of the valve core 30 is L2, where 0.9L2≤L1≤1.1L2. This configuration ensures that the lubrication groove 41 has sufficient length to guarantee that the lubricating medium can fully contact the valve core 30 and cover the contact surface between the valve core 30 and the fixed seat 20 as much as possible, thus ensuring effective lubrication. For example, L1 = 0.9L2, L2, or 1.1L2.

[0043] In a specific embodiment, multiple flow holes 201 are evenly distributed around the valve core 30, and there is a symmetrical axis 202 between any two adjacent flow holes 201. The two adjacent flow holes 201 are symmetrically arranged about the symmetrical axis 202, which is convenient for processing. At this time, the simultaneous opening and closing of multiple flow holes 201 can be achieved by rotating the valve core 30.

[0044] like Figure 5 As shown, further, a lubrication section 40 is provided between any two adjacent flow holes 201, and each lubrication section 40 is provided with a plurality of spaced lubrication grooves 41 to accommodate as much lubricating medium as possible.

[0045] In a specific embodiment, at least one lubrication groove 41 is provided to extend along the direction of the axis of symmetry 202 so that the lubricating medium is distributed along the axis of symmetry, so that the lubricating medium can be applied to both sides of the axis of symmetry 202 when the valve core 30 rotates.

[0046] In a specific embodiment, at least two lubrication grooves 41 are respectively located on both sides of the axis of symmetry 202. During the rotation of the valve core 30, the sealing part 31 can apply the lubricating medium toward the axis of symmetry 202 to promote the uniform distribution of the lubricating medium.

[0047] In a specific embodiment, the area between any two adjacent flow holes 201 of the fixing seat 20 gradually expands radially outward along the fixing seat 20 to give the fixing seat 20 sufficient structural strength.

[0048] like Figure 5 As shown, in a further embodiment, the angle between the lubrication groove 41 and the axis of symmetry 202 is α. Between any two adjacent flow holes 201, the angle α gradually increases along the axis of symmetry 202 and outward from the axis of the valve cavity 101, so that the inclination of the lubrication groove 41 relative to the axis of symmetry 202 can be adapted to the structure of the fixed seat 20 between any two adjacent flow holes 201 and gradually expanding outward along the radial direction of the fixed seat 20, so as to promote the uniform distribution of lubricating oil between the fixed seat 20 and the valve core 30.

[0049] In a further embodiment, between any two adjacent flow holes 201, along the axis of symmetry 202 and outward from the axis of the valve cavity 101, the number of lubrication grooves 41 gradually increases to adapt to the structure of the fixing seat 20 between any two adjacent flow holes 201 and gradually expanding outward along the radial direction of the fixing seat 20, so that the lubrication grooves 41 are evenly distributed and promote the full application of the lubricating medium.

[0050] like Figure 4 and Figure 5 As shown, in a specific embodiment, the lubrication section 40 is provided with a plurality of lubrication grooves 41 in order to accommodate as much lubricating medium as possible.

[0051] like Figure 4 and Figure 5 As shown, in a specific embodiment, multiple lubrication grooves 41 are spaced apart along the circumference of the valve core 30 to promote the lubricating medium to be fully applied between the valve core 30 and the fixed seat 20 along the circumference of the valve core 30.

[0052] like Figure 4 and Figure 5 As shown, in a specific embodiment, multiple lubrication grooves 41 are staggered along the radial direction of the valve core 30 to arrange as many lubrication grooves 41 as possible in the radial direction of the valve core 30 so that the lubricating medium can fully cover the radial direction of the valve core 30.

[0053] In another specific embodiment, multiple lubrication grooves 41 are spaced apart along the radial direction of the valve core 30, which facilitates a more uniform distribution of the lubricating medium in the radial direction of the valve core 30 and promotes the full application of the lubricating medium.

[0054] In a further embodiment, multiple lubrication grooves 41 are staggered along the circumference of the valve core 30 to arrange as many lubrication grooves 41 as possible in the circumference of the valve core 30 so that the lubricating medium can fully cover the circumference of the valve core 30.

[0055] like Figures 2 to 5 As shown, in a specific embodiment, the lubrication groove 41 extends radially along the valve core 30 to form an elongated structure, which is conducive to accommodating more lubricating medium so that the lubricating medium is distributed along the length of the lubrication groove 41. During the rotation of the valve core 30, the lubricating medium in the elongated lubrication groove 41 is driven by the sealing part 31 in the circumferential direction to be applied to the surface of the fixed seat 20, which is conducive to uniform application at one time.

[0056] In other embodiments, the lubrication groove 41 may also be circular, and multiple circular lubrication grooves 41 are provided to promote the uniform application of the lubricating medium.

[0057] like Figures 2 to 5 As shown, when the lubrication groove 41 is set to a long strip shape, at least one side of the groove wall of the lubrication groove 41 is set to an arc-shaped curved surface along the length direction of the lubrication groove 41. This can reduce the accumulation of lubricating medium on the groove wall, making it easier to evenly apply the lubricating medium between the valve core 30 and the fixed seat 20, thereby improving the lubrication effect.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A shut-off valve, characterized in that, include: A valve body (10) is provided inside the valve body (10), and the valve cavity (101) has an axial direction; A fixed seat (20) is installed in the valve cavity (101); the fixed seat (20) is provided with a flow hole (201), which passes through the fixed seat (20) along the axial direction; A valve core (30) is installed in the valve cavity (101). The valve core (30) includes a blocking part (31). The blocking part (31) abuts against the surface of the fixed seat (20). The valve core (30) can rotate around its own axis to switch between a first state and a second state. In the first state, the blocking part (31) at least partially blocks and seals the flow hole (201). In the second state, the blocking part (31) is spaced apart from the flow hole (201). Along the axial direction, at least one of the sealing part (31) and the fixing seat (20) has a lubrication part (40) on its end face facing the other. The lubrication part (40) is provided with a lubrication groove (41), which contains a lubricating medium. The lubricating medium in the lubrication part (40) is located between the sealing part (31) and the fixed seat (20) as the valve core (30) rotates.

2. The shut-off valve according to claim 1, characterized in that, The number of the flow holes (201) is at least two, and the at least two flow holes (201) are distributed at intervals; The valve core (30) is provided with at least two of the sealing parts (31), and the at least two sealing parts (31) are connected; in the first state, each of the sealing parts (31) at least partially blocks and seals a corresponding flow hole (201). The lubrication portion (40) is provided between at least two of the flow holes (201).

3. The shut-off valve according to claim 2, characterized in that, At least two of the flow holes (201) are respectively disposed on both sides of the lubrication part (40) along a first direction, and the lubrication groove (41) extends along a second direction in the lubrication part (40); The first direction and the second direction are at an angle, and the first direction and the second direction are respectively perpendicular to the axis.

4. The shut-off valve according to claim 2, characterized in that, The plurality of flow holes (201) are evenly distributed around the circumference of the valve core (30), and there is a symmetrical axis (202) between any two adjacent flow holes (201), and the two adjacent flow holes (201) are symmetrically arranged about the symmetrical axis (202); The lubrication section (40) is provided between any two adjacent flow holes (201), and each lubrication section (40) is provided with a plurality of spaced lubrication grooves (41).

5. The shut-off valve according to claim 4, characterized in that, At least one of the lubrication grooves (41) extends along the direction of the axis of symmetry (202); at least two of the lubrication grooves (41) are respectively disposed on both sides of the axis of symmetry (202).

6. The shut-off valve according to claim 5, characterized in that, The area between any two adjacent flow holes (201) of the fixed seat (20) gradually expands outward radially along the fixed seat (20); the angle between the lubrication groove (41) and the axis of symmetry (202) is angle α; Between any two adjacent flow holes (201), the included angle α gradually increases along the axis of symmetry (202) and outward from the axis of the valve cavity (101); and / or, between any two adjacent flow holes (201), the number of lubrication grooves (41) gradually increases along the axis of symmetry (202) and outward from the axis of the valve cavity (101).

7. The shut-off valve according to any one of claims 1 to 6, characterized in that, The lubrication section (40) is provided with a plurality of lubrication grooves (41); A plurality of lubrication grooves (41) are spaced apart along the circumference of the valve core (30); and / or, a plurality of lubrication grooves (41) are staggered along the radial direction of the valve core (30); or, Along the radial direction of the valve core (30), a plurality of lubrication grooves (41) are spaced apart; and / or, along the circumferential direction of the valve core (30), a plurality of lubrication grooves (41) are staggered.

8. The shut-off valve according to any one of claims 1 to 6, characterized in that, Along the radial direction of the valve core (30), the lubrication groove (41) extends to form an elongated structure.

9. The shut-off valve according to claim 8, characterized in that, Along the length of the lubrication groove (41), at least one side of the groove wall of the lubrication groove (41) is configured as an arc-shaped curved surface.

10. The shut-off valve according to any one of claims 1 to 6, characterized in that, Along the radial direction of the fixed seat (20), the flow hole (201) gradually increases outward along the circumferential dimension of the fixed seat (20).

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