Valve cavity sealing device and method

Abstract

This invention discloses a valve cavity sealing device and method. The valve cavity sealing device includes a valve body, a valve seat, a main body, and a flexible sealing ring. The valve body has a valve cavity, and the valve seat is installed in the valve cavity, dividing the valve cavity into a first cavity and a second cavity. The valve seat has a sealing ring surface facing the first cavity, and the sealing ring surface has a central hole. The first cavity communicates with the second cavity through the central hole. The sealing ring surface is used to cooperate with the valve disc for sealing. The inner circumferential surface of the flexible sealing ring is fitted onto the main body and is detachably connected to the main body. Both the main body and the flexible sealing ring are located in the second cavity, and the outer circumferential surface of the flexible sealing ring and the inner circumferential wall of the second cavity are pressed together for sealing. The valve cavity sealing device provided by this invention has the advantage of avoiding secondary contamination of the valve.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically, to a valve cavity sealing device and method. Background Technology

[0002] After prolonged use, the sealing surfaces of the valve disc and seat will wear down, reducing their tightness. Therefore, grinding is necessary to repair the sealing surfaces. When grinding the sealing surfaces of a gate valve, grinding debris / powder is generated. In related technologies, this debris tends to remain inside the valve cavity, making it difficult to clean and potentially causing secondary contamination of the valve. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a valve cavity sealing device that has the advantage of preventing secondary contamination of the valve.

[0004] An embodiment of the present invention also proposes a valve cavity sealing method.

[0005] The valve cavity sealing device according to an embodiment of the present invention includes a valve body, a valve seat, a main body, and a flexible sealing ring. The valve body has a valve cavity, the valve seat is installed in the valve cavity and divides the valve cavity into a first cavity and a second cavity, the valve seat is provided with a sealing ring surface facing the first cavity, the sealing ring surface has a central hole, the first cavity communicates with the second cavity through the central hole, and the sealing ring surface is used to cooperate with the valve disc for sealing; the inner circumferential surface of the flexible sealing ring is sleeved on the main body and detachably connected to the main body, the main body and the flexible sealing ring are both located in the second cavity, and the outer circumferential surface of the flexible sealing ring and the inner circumferential wall of the second cavity are pressed together for sealing.

[0006] According to the valve cavity sealing device of the present invention, when the sealing ring surface is ground, the grinding debris falls into the second cavity. Due to the sealing of the second cavity by the flexible seal, the flexible seal prevents the grinding debris from falling into the depth of the second cavity, thereby protecting the second cavity and avoiding contamination of the second cavity.

[0007] In addition, the main body and flexible sealing ring can catch grinding debris, thereby preventing the grinding debris from scattering in the valve cavity, reducing the difficulty of cleaning the valve cavity, avoiding secondary contamination of the valve cavity by grinding debris, and thus avoiding secondary contamination of the valve.

[0008] In some embodiments, the body has a first end face facing the sealing surface, the edge of the first end face is provided with a receiving groove recessed toward the inside of the body, the flexible sealing ring has a second end face flush with the first end face, the second end face is provided with an inclined surface facing the receiving groove, the inclined surface extends circumferentially in the flexible sealing ring and communicates with the receiving groove.

[0009] In some embodiments, the main body is cylindrical, the outer peripheral surface of the main body is provided with external threads, the inner peripheral surface of the flexible sealing ring is provided with internal threads, and the flexible sealing ring is connected to the main body through the cooperation of the internal threads and the external threads.

[0010] In some embodiments, the inner circumferential surface of the flexible sealing ring is provided with a groove that is recessed toward the outer circumferential surface of the flexible sealing ring, and the outer circumferential surface of the main body is provided with a locking block that engages with the groove.

[0011] In some embodiments, the second cavity is cylindrical, and the outer diameter of the flexible sealing ring is larger than the diameter of the second cavity. The flexible sealing ring includes either a rubber sealing ring or a silicone sealing ring.

[0012] In some embodiments, the first end face of the body is provided with a protrusion suitable for human hand gripping.

[0013] In some embodiments, the protrusion includes any one of a handle, a grip, a hook, and a lug.

[0014] According to an embodiment of the present invention, a valve cavity plugging method based on the valve cavity plugging device described in the above embodiments includes the following steps:

[0015] A flexible sealing ring is fitted onto the main body and connected to it.

[0016] The flexible sealing ring and the main body are inserted into the second cavity, and the outer circumferential surface of the flexible sealing ring and the inner circumferential wall of the second cavity are squeezed and sealed.

[0017] Use abrasive cloth to grind the sealing ring surface and generate abrasive debris.

[0018] The grinding debris falls into the second chamber, where a flexible sealing ring and the main body collect the grinding debris.

[0019] Thus, the flexible sealing ring and the main body achieve the sealing of the second cavity and the collection of grinding debris.

[0020] The other technical advantages of the valve cavity sealing method according to the embodiments of the present invention are the same as the technical advantages of the valve cavity sealing device in the above embodiments, and will not be repeated here.

[0021] In some embodiments, the process of the flexible sealing ring and the body collecting grinding debris includes: the grinding debris sliding down an inclined plane and collecting in a receiving groove.

[0022] In some embodiments, after grinding the sealing ring surface with abrasive cloth, the method further includes: removing the body and flexible sealing ring carrying abrasive debris from the valve cavity via a protrusion; and controlling both to be in a horizontal state when removing the body and flexible sealing ring. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a valve cavity sealing device according to an embodiment of the present invention.

[0024] Figure 2 This is another schematic diagram of a valve cavity sealing device according to an embodiment of the present invention.

[0025] Reference numerals: 1. Valve body; 11. Valve cavity; 111. First cavity; 112. Second cavity; 2. Valve seat; 21. Sealing ring surface; 22. Center hole; 3. Main body; 31. Receiving groove; 4. Flexible sealing ring; 41. Inclined surface; 5. Protrusion. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] The following is combined with Figures 1-2 A valve cavity sealing device and method according to embodiments of the present invention are described.

[0028] like Figure 1 and Figure 2 As shown, the valve cavity sealing device according to an embodiment of the present invention includes a valve body 1, a valve seat 2, a main body 3, and a flexible sealing ring 4. The valve body 1 has a valve cavity 11. The valve seat 2 is installed in the valve cavity 11 and divides the valve cavity 11 into a first cavity 111 and a second cavity 112. The valve seat 2 is provided with a sealing ring surface 21 facing the first cavity 111. The sealing ring surface 21 has a central hole 22. The first cavity 111 communicates with the second cavity 112 through the central hole 22. The sealing ring surface 21 is used to cooperate with the valve disc for sealing. The inner circumferential surface of the flexible sealing ring 4 is sleeved on the main body 3 and detachably connected to the main body 3. The main body 3 and the flexible sealing ring 4 are both located in the second cavity 112. The outer circumferential surface of the flexible sealing ring 4 and the inner circumferential wall of the second cavity 112 are pressed together for sealing.

[0029] According to an embodiment of the valve cavity sealing device of the present invention, the main body 3 serves as a support for the flexible seal, facilitating the movement of the flexible seal in and out of the second cavity 112. When the sealing ring surface 21 is ground, grinding debris falls into the second cavity 112. Due to the sealing of the second cavity 112 by the flexible seal, the flexible seal prevents the grinding debris from falling deeper into the second cavity 112, thereby protecting the second cavity 112 and preventing contamination of the second cavity 112.

[0030] In addition, the main body 3 and the flexible sealing ring 4 can catch the grinding debris, thereby preventing the grinding debris from scattering in the valve cavity 11, reducing the difficulty of cleaning the valve cavity 11, avoiding secondary contamination of the valve cavity 11 by the grinding debris, and thus avoiding secondary contamination of the valve.

[0031] Understandably, due to the compression between the outer circumferential surface of the flexible sealing ring 4 and the inner circumferential wall of the second cavity 112, the pressure between them increases, thereby increasing the friction between them. This friction ensures the stability of the position of the flexible sealing ring 4.

[0032] Understandably, the first cavity 111 is located above the second cavity 112.

[0033] For ease of understanding, Figure 1 Arrow A in the diagram indicates the vertical / upward direction of the valve cavity sealing device.

[0034] In some embodiments, such as Figure 1 As shown, the main body 3 has a first end face facing the sealing surface, and the edge of the first end face is provided with a receiving groove 31 that is recessed into the inside of the main body 3. The flexible sealing ring 4 has a second end face that is flush with the first end face, and the second end face is provided with an inclined surface 41 facing the receiving groove 31. The inclined surface 41 extends in the circumferential direction of the flexible sealing ring 4 and communicates with the receiving groove 31.

[0035] Therefore, when the grinding debris falls into the flexible seal, it first falls into the inclined surface 41, which guides the grinding debris to the receiving groove 31. The receiving groove 31 collects the grinding debris, thereby avoiding the scattering of the grinding debris and facilitating centralized cleaning of the grinding debris.

[0036] Understandably, the receiving groove 31 is an annular groove extending upward around the flexible sealing ring 4, and the inclined surface 41 is an annular surface extending upward around the flexible sealing ring 4.

[0037] In some embodiments, such as Figure 1 As shown, the main body 3 is cylindrical, and the outer circumferential surface of the main body 3 is provided with external threads. The inner circumferential surface of the flexible sealing ring 4 is provided with internal threads. The flexible sealing ring 4 is connected to the main body 3 through the cooperation of the internal and external threads.

[0038] This allows for a detachable connection between the flexible sealing ring 4 and the main body 3. Furthermore, the engagement of the internal and external threads facilitates quick assembly and disassembly of the flexible sealing ring 4 and the main body 3. In addition, the engagement of the internal and external threads provides a seal, ensuring a tight seal at the connection between the flexible sealing ring 4 and the main body 3, improving the sealing effect of the flexible seal and the main body 3 on the second cavity 112, and further preventing grinding debris from falling deeper into the second cavity 112.

[0039] Specifically, the material of the main body 3 can be carbon steel.

[0040] In some embodiments, the inner circumferential surface of the flexible sealing ring 4 is provided with a groove that is recessed toward the outer circumferential surface of the flexible sealing ring 4, and the outer circumferential surface of the main body 3 is provided with a locking block that fits into the groove.

[0041] This enables the flexible sealing ring 4 and the main body 3 to be detachably connected, and the locking block and the locking groove ensure the reliability of the connection between the two.

[0042] Specifically, when assembling and disassembling the flexible sealing ring 4 and the main body 3, the flexible sealing ring 4 utilizes its elastic deformation characteristics to avoid the locking block, thereby achieving the engagement and separation of the locking block and the locking groove, and thus realizing the assembly and disassembly of the flexible sealing ring 4 and the main body 3.

[0043] In some embodiments, such as Figure 1 As shown, the second cavity 112 is cylindrical, and the outer diameter of the flexible sealing ring 4 is larger than the diameter of the second cavity 112. The flexible sealing ring 4 includes either a rubber sealing ring or a silicone sealing ring.

[0044] This allows the flexible sealing ring 4 to be squeezed into the second cavity 112, thereby achieving the sealing effect of the flexible sealing ring 4 on the second cavity 112.

[0045] Specifically, the outer diameter of the flexible sealing ring 4 is slightly larger than the diameter of the second cavity 112.

[0046] Specifically, when the valve sizes are different, the diameter of the valve cavity 11 is also different. In this case, the radial thickness of the flexible sealing ring 4 can be changed to accommodate the second cavity 112 with different diameters.

[0047] In some embodiments, such as Figure 1 As shown, the first end face of the main body 3 is provided with a protrusion 5 suitable for human hand gripping.

[0048] Therefore, the operator can easily control the main body 3 to enter and exit the second cavity 112 through the protrusion 5.

[0049] In some embodiments, such as Figure 1 As shown, the protrusion 5 includes any one of a handle, a grip, a hook, and a lug.

[0050] This makes it easy for the human hand to grip the protrusion 5. In addition, the protrusion 5 has a variety of shapes and structures.

[0051] like Figure 1 As shown, the valve cavity 11 sealing method according to an embodiment of the present invention, based on the valve cavity sealing device as described in the above embodiment, includes the following steps:

[0052] The flexible sealing ring 4 is fitted onto the main body 3 and connected to it.

[0053] The flexible sealing ring 4 and the main body 3 are inserted into the second cavity 112, and the outer peripheral surface of the flexible sealing ring 4 and the inner peripheral wall of the second cavity 112 are squeezed and sealed.

[0054] The sealing ring surface 21 is ground with abrasive cloth, producing abrasive debris.

[0055] The grinding debris falls into the second chamber 112, where the flexible sealing ring 4 and the main body 3 collect the grinding debris.

[0056] Thus, the flexible sealing ring 4 and the main body 3 achieve the sealing of the second cavity 112 and the collection of grinding debris.

[0057] Other technical advantages of the valve cavity 11 sealing method according to the present invention are the same as those of the valve cavity sealing device in the above embodiments, and will not be repeated here.

[0058] Understandably, before grinding the sealing ring surface 21, the operator selects a flexible sealing ring 4 of appropriate size according to the diameter of the second cavity 112.

[0059] In some embodiments, such as Figure 1 As shown, the process of collecting grinding debris by the flexible sealing ring 4 and the body 3 includes: the grinding debris sliding down the inclined surface 41 and collecting in the receiving groove 31.

[0060] Thus, the receiving tank 31 achieves the collection of grinding debris.

[0061] In some embodiments, such as Figure 1 As shown, after grinding the sealing ring surface 21 with abrasive cloth, the process also includes: removing the main body 3 and flexible sealing ring 4, which are carrying grinding debris, from the valve cavity 11 through the protrusion 5; and controlling both of the main body 3 and flexible sealing ring 4 to be in a horizontal state when removing them.

[0062] Thus, the main body 3 and the flexible sealing ring 4 achieve centralized cleaning of grinding debris. In addition, the main body 3 and the flexible sealing ring 4 are kept in a horizontal state, ensuring the stability of the grinding debris in the receiving groove 31 when it is removed, and preventing the grinding debris from spilling out of the receiving groove 31.

[0063] Specifically, before removing the main body 3 and the flexible sealing ring 4 from the valve cavity 11, use a vacuum cleaner to vacuum the edge where the flexible sealing ring 4 and the second cavity 112 come into contact.

[0064] Specifically, after removing the main body 3 and the flexible sealing ring 4, an endoscope is used to inspect the internal environment of the valve chamber 11 to confirm whether there are any foreign objects such as grinding debris inside the chamber. If so, the grinding debris is cleaned up using a vacuum cleaner.

[0065] In summary, the valve cavity sealing device and method of the present invention have the following technical effects:

[0066] 1. It has a good sealing effect on the second cavity 112, so grinding debris is not easy to fall into the second cavity 112.

[0067] 2. The receiving groove enables the centralized collection of grinding debris, which is beneficial for cleaning the valve chamber 11.

[0068] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0069] 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 invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] In this invention, unless otherwise explicitly 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 is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply 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 that the first feature is at a lower horizontal level than the second feature.

[0072] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A valve cavity sealing device, characterized in that, include: The valve body comprises a valve cavity, the valve seat being mounted on the valve cavity and dividing the valve cavity into a first cavity and a second cavity. The valve seat has a sealing ring surface facing the first cavity, the sealing ring surface having a central hole through which the first cavity communicates with the second cavity, and the sealing ring surface is used to cooperate with the valve disc for sealing. The body and the flexible sealing ring are fitted onto the body and detachably connected to the body. Both the body and the flexible sealing ring are located in the second cavity. The outer circumferential surface of the flexible sealing ring and the inner circumferential wall of the second cavity are squeezed and sealed. The main body has a first end face facing the sealing ring surface, and the edge of the first end face is provided with a receiving groove recessed towards the inside of the main body. The flexible sealing ring has a second end face flush with the first end face, and the second end face is provided with an inclined surface facing the receiving groove. The inclined surface extends in the circumferential direction of the flexible sealing ring and communicates with the receiving groove.

2. The valve cavity sealing device according to claim 1, characterized in that, The main body is cylindrical, and its outer circumferential surface is provided with external threads. The inner circumferential surface of the flexible sealing ring is provided with internal threads. The flexible sealing ring is connected to the main body through the cooperation of the internal threads and the external threads.

3. The valve cavity sealing device according to claim 1, characterized in that, The inner circumferential surface of the flexible sealing ring is provided with a groove that is recessed toward the outer circumferential surface of the flexible sealing ring, and the outer circumferential surface of the main body is provided with a locking block that fits into the groove.

4. The valve cavity sealing device according to claim 1, characterized in that, The second cavity is cylindrical, and the outer diameter of the flexible sealing ring is larger than the diameter of the second cavity. The flexible sealing ring includes either a rubber sealing ring or a silicone sealing ring.

5. The valve cavity sealing device according to claim 1, characterized in that, The first end face of the main body is provided with a protrusion suitable for human hand gripping.

6. The valve cavity sealing device according to claim 5, characterized in that, The protrusion includes any one of a handle, a grip, a hook, and a lug.

7. A method for sealing a valve cavity, characterized in that, The valve cavity sealing device according to any one of claims 1-6 includes the following steps: A flexible sealing ring is fitted onto the main body and connected to it; The flexible sealing ring and the main body are inserted into the second cavity, and the outer circumferential surface of the flexible sealing ring and the inner circumferential wall of the second cavity are squeezed and sealed. Use abrasive cloth to grind the sealing ring surface and generate abrasive debris; The grinding debris falls into the second chamber, where a flexible sealing ring and the main body collect the grinding debris.

8. The valve cavity sealing method according to claim 7, characterized in that, The process of collecting grinding debris by the flexible sealing ring and the main body includes: the grinding debris sliding down the inclined surface and collecting in the receiving groove.

9. The valve cavity sealing method according to claim 7, characterized in that, After grinding the sealing ring surface with abrasive cloth, the method further includes: removing the main body and flexible sealing ring carrying grinding debris from the valve cavity through a protrusion; and controlling both to be in a horizontal state when removing the main body and flexible sealing ring.

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