A high-pressure plug valve

Abstract

This utility model relates to a high-pressure plug valve, belonging to the field of plug valves. It includes a valve body; a rotatable plug assembly disposed inside the valve body, comprising a sealing sleeve detachably disposed inside the valve body; two flow channel holes symmetrically opened on the outer side of the sealing sleeve, both flow channel holes coinciding with the flow channels on both sides of the valve body; and a plug body detachably disposed inside the sealing sleeve, with the outer side of the plug body tightly fitted against the inner side of both the valve body and the sealing sleeve. This utility model utilizes a tapered design for the plug body, ensuring precise matching with the inner side of the valve body, resulting in a tighter fit under high pressure and enhanced radial sealing. Detachable top and bottom sealing rings work in conjunction with the sealing assembly to prevent axial leakage. The multi-arc sealing sleeve balances low flow resistance and circumferential sealing, while a grease injection valve provides supplementary sealing, comprehensively ensuring reliable sealing under high pressure and preventing media leakage.

Description

Technical Field

[0001] This utility model relates to the field of plug valve technology, specifically a high-pressure plug valve. Background Technology

[0002] In industrial production, plug valves are not only used for on / off control, but also for flow regulation and pressure control. They have high reliability and durability and are widely used in various media transportation pipelines, especially in industries such as petroleum, chemical, natural gas, water treatment and power. The core structure of a plug valve usually includes a plug with a through hole, which is rotated to control the flow of fluid or regulate the flow rate.

[0003] When existing plug valves are used in high-pressure environments, they are difficult to maintain a good sealing state when faced with pressure fluctuations, which can easily lead to media leakage. This not only wastes resources, but also poses serious safety hazards when transporting flammable, explosive, toxic and harmful media. Therefore, this application proposes a high-pressure plug valve to solve the above-mentioned technical problems. Utility Model Content

[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, this utility model provides a high-pressure plug valve, which has the advantage of improving the sealing performance of the plug valve.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure plug valve, comprising a valve body;

[0006] A rotatable plug assembly located inside the valve body includes a sealing sleeve detachably located inside the valve body; two flow channel holes symmetrically opened on the outer side of the sealing sleeve, both of which coincide with the flow channels on both sides of the valve body; a plug body detachably located inside the sealing sleeve, with the outer side of the plug body tightly fitted against the inner side of the valve body and the inner side of the sealing sleeve; two sealing rings detachably located on the top and bottom outer sides of the plug body, respectively; and a flow hole opened on the outer side of the plug body, with the dimensions of the flow hole being the same as the flow channel dimensions of the valve body.

[0007] A sealing assembly is detachably located on the lower end face of the valve body;

[0008] The control component is detachably located on the upper end face of the valve body.

[0009] As a further improvement of this utility model, the valve body also includes eight sealing threaded grooves, which are arranged in groups of four and are symmetrically and evenly distributed on the lower end face of the valve body.

[0010] As a further improvement of this utility model, the plug assembly further includes a grease injection thread groove formed on the lower end face of the plug body;

[0011] The grease injection hole is located on the outside of the plug body and is connected to the grease injection thread groove;

[0012] A guide post is disposed on the upper end face of the rotary valve body, and the control component is disposed on the upper end face of the guide post;

[0013] A grease injection valve, which is connectable and threaded, is located inside the grease injection thread groove.

[0014] As a further improvement of this utility model, the sealing sleeve is composed of multiple sealing arc plates, and the two flow channel holes are opened on the outside of the two sealing arc plates that are perpendicular to the flow channel axis of the valve body.

[0015] Two fixed threaded grooves are symmetrically opened on the upper end face of the guide post.

[0016] As a further improvement of this utility model, the plug body is a conical plug body, and the taper of the plug body matches the inner side of the valve body.

[0017] As a further improvement of this utility model, the sealing assembly includes a valve body cover, which is detachably disposed on the lower end face of the valve body;

[0018] Two connecting threaded grooves are symmetrically opened on the upper surface of the valve body cover;

[0019] Eight first fixing bolts are symmetrical and rotatable through the valve body cover, and the upper ends of the eight first fixing bolts are respectively threaded to the inner side of the eight sealing thread grooves.

[0020] The flange is detachably located between the lower end faces of the eight first fixing bolts.

[0021] As a further improvement of this utility model, two reinforcing bolts are respectively rotatably penetrating the lower surface of the flange, and the upper ends of the two reinforcing bolts are respectively threadedly connected to the inner side of the two connecting thread grooves.

[0022] The sealing ring located at the bottom of the plug body contacts the upper surface of the valve body cover, and the lower end of the plug body and the grease injection valve are both located inside the valve body cover.

[0023] As a further improvement of this utility model, the control component includes a valve stem, which is detachably disposed on the upper end face of the guide post.

[0024] A T-shaped groove is formed on the lower surface of the valve stem, and the upper end of the guide post is located inside the T-shaped groove;

[0025] Two second fixing bolts are rotatably disposed on the upper surface of the valve stem, and the two second fixing bolts are respectively threadedly connected to the inner side of the two fixing thread grooves.

[0026] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include:

[0027] 1. The high-pressure plug valve in the preferred embodiment of this utility model features a tapered plug body that precisely matches the inner side of the valve body, resulting in a tighter fit under high pressure and enhanced radial sealing. Removable top and bottom sealing rings work in conjunction with the sealing assembly to prevent axial leakage. A multi-arc sealing sleeve balances low flow resistance and circumferential sealing, while a grease injection valve provides additional sealing, ensuring reliable sealing under high pressure and preventing media leakage. Furthermore, the control component valve stem is connected to bolts via a T-groove, facilitating easy disassembly and reducing maintenance costs. The grease injection valve lubricates the plug body, reducing wear and extending the lifespan of the plug assembly. The reinforced structure of the sealing assembly bolts and flanges ensures structural stability, reducing maintenance requirements and improving production continuity.

[0028] 2. The high-pressure plug valve in the preferred embodiment of this utility model has a simple overall structure and is easy to operate. It not only allows the plug body and valve body to fit more tightly under high pressure, thereby improving the sealing performance of the plug valve in a high-pressure environment, but also, with the help of the grease injection valve, it can not only extend the life of the plug assembly, but also improve the sealing performance of the plug valve. It has good use value and application prospects. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall cross-sectional three-dimensional structure in a preferred embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the overall three-dimensional structure in a preferred embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the valve body in a preferred embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the overall exploded three-dimensional structure of the plug assembly in a preferred embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the overall three-dimensional structure of the sealing assembly in a preferred embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the overall three-dimensional structure of the control component in a preferred embodiment of the present invention.

[0035] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Valve body; 11. Sealing threaded groove; 2. Plug assembly; 21. Sealing sleeve; 22. Flow channel hole; 23. Plug body; 24. Sealing ring; 25. Flow hole; 26. Grease injection threaded groove; 27. Grease injection hole; 28. Guide post; 29. ​​Grease injection valve; 3. Sealing assembly; 31. Valve body cover; 32. Connecting threaded groove; 33. First fixing bolt; 34. Flange; 4. Control assembly; 41. Valve stem; 42. T-slot; 43. Second fixing bolt. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] In the embodiments, by Figure 1-6 Provided is a high-pressure plug valve, which may optionally include, but is not limited to, a valve body 1;

[0038] The rotatable plug assembly 2, located inside the valve body 1, includes a sealing sleeve 21, which is detachably located inside the valve body 1; two flow channel holes 22, which are symmetrically opened on the outside of the sealing sleeve 21, and both flow channel holes 22 coincide with the flow channels on both sides of the valve body 1; a plug body 23, which is detachably located inside the sealing sleeve 21, and the outside of the plug body 23 is tightly fitted with the inside of the valve body 1 and the inside of the sealing sleeve 21; two sealing rings 24, which are detachably located on the top and bottom outside of the plug body 23, respectively; and a flow hole 25, which is opened on the outside of the plug body 23, and the specifications and dimensions of the flow hole 25 are the same as the flow channel specifications and dimensions of the valve body 1.

[0039] The sealing assembly 3 is detachably located on the lower end face of the valve body 1;

[0040] The control component 4 is detachably located on the upper end face of the valve body 23.

[0041] In this embodiment, a high-pressure plug valve of the present invention is provided. The plug assembly 2 can be sealed and installed inside the valve body 1 by the sealing assembly 3, so that the plug valve can be used in a high-pressure environment. At the same time, under the action of the control assembly 4, the plug body 23 located inside the valve body 1 can be rotated, so that the flow hole 25 of the plug body 23 coincides with the flow channel hole 22 of the sealing sleeve 21 and the flow channel of the valve body 1, thus controlling the opening and closing state of the plug valve.

[0042] Furthermore, such as Figure 3As shown, in the preferred embodiment of this utility model, the valve body 1 further includes eight sealing threaded grooves 11, which are arranged in groups of four and are symmetrically and evenly distributed on the lower end face of the valve body 1.

[0043] Furthermore, such as Figure 4 As shown, the plug assembly 2 in the preferred embodiment of this utility model further includes a grease injection groove 26, which is opened on the lower end face of the plug body 23; a grease injection hole 27, which is opened on the outside of the plug body 23 and communicates with the grease injection groove 26; a guide post 28, which is disposed on the upper end face of the plug body 23 and the control component 4 is disposed on the upper end face of the guide post 28; and a grease injection valve 29, which is connected and threadedly connected to the inside of the grease injection groove 26.

[0044] Furthermore, the sealing sleeve 21 is composed of multiple sealing arcs, and two flow channel holes 22 are opened on the outside of the two sealing arcs perpendicular to the flow channel axis of the valve body 1; two fixed threaded grooves are symmetrically opened on the upper end face of the guide post 28.

[0045] Furthermore, the plug body 23 is a conical plug body, and the taper of the plug body 23 matches the inner side of the valve body 1.

[0046] This embodiment provides several preferred embodiments of the plug assembly 2. The plug body 23 is enclosed by a sealing sleeve 21 composed of multiple sealing arcs. Its flow channel holes 22 are only opened on the arcs perpendicular to the flow channel axis of the valve body 1, ensuring low resistance during fluid flow and enhancing circumferential sealing during plug body 23 rotation through other arcs. The sealing rings 24 at the top and bottom of the plug body 23, in conjunction with the sealing assembly 3, block the leakage path of fluid along the axial direction of the plug body 23, forming a three-dimensional sealing system with the radial seal of the conical surface. Furthermore, the taper of the plug body 23 matches the inner side of the valve body 1. When the valve body 1 is subjected to high-pressure fluid, the fluid pressure forces the plug body 23 to press against the sealing sleeve 21 and the inner wall of the valve body 1. The conical surface fit increases with increasing pressure, resulting in a more pronounced seal. This invention enhances the sealing performance of the plug valve under high pressure. Traditional straight-tube plug valves are prone to leakage due to pressure fluctuations. In use, when the control component 4 drives the guide post 28 to rotate 90°, the plug body 23 rotates synchronously. When the flow hole 25 of the plug body 23 is completely aligned with the flow channel hole 22 of the sealing sleeve 21 and the flow channels on both sides of the valve body 1, the plug valve is in a flow state. After the plug body 23 rotates another 90°, the flow hole 25 and the flow channel hole 22 are completely misaligned, and the conical outer surface blocks the fluid passage, thus achieving a sealed stop. Furthermore, sealing grease is injected into the grease injection thread groove 26 through the grease injection valve 29. The grease flows through the grease injection hole 27 to the gap between the outside of the plug body 23 and the sealing sleeve 21, supplementing the seal and lubricating the conical surface, reducing the rotational wear of the plug body 23.

[0047] Furthermore, such as Figure 5As shown, the sealing assembly 3 in the preferred embodiment of this utility model includes a valve body cover 31, which is detachably disposed on the lower end face of the valve body 1; two connecting threaded grooves 32, which are symmetrically opened on the upper surface of the valve body cover 31; eight first fixing bolts 33, which are symmetrical and rotatably pass through the valve body cover 31, and the upper ends of the eight first fixing bolts 33 are respectively threadedly connected to the inner side of the eight sealing threaded grooves 11; and a flange 34, which is detachably disposed between the lower end faces of the eight first fixing bolts 33.

[0048] Furthermore, two reinforcing bolts are rotatably inserted through the lower surface of the flange 34, and the upper ends of the two reinforcing bolts are threadedly connected to the inner side of the two connecting thread grooves 32; the sealing ring 24 located at the bottom of the plug body 23 contacts the upper surface of the valve body cover 31, and the lower end of the plug body 23 and the grease injection valve 29 are both located inside the valve body cover 31.

[0049] In this embodiment, several preferred embodiments of the sealing assembly 3 are given. The valve body cover 31 can be fixedly installed on the lower end face of the valve body 1 by the first fixing bolt 33. In this way, the valve body cover 31 will cover the lower opening of the valve body 1, and completely wrap the lower end of the plug assembly 2, including the bottom of the plug body 23 and the grease injection valve 29, to form a closed space. The direct contact between the valve body cover 31 and the sealing ring 24 at the bottom of the plug body 23 further strengthens the axial seal. The sealing ring 24 undergoes elastic deformation under the pressure of the valve body cover 31, filling the micro gap between the plug body 23 and the valve body cover 31. At the same time, the flange 34 is threaded to the connecting thread groove 32 of the valve body cover 31 by two reinforcing bolts, and the lower end face of the flange 34 is in contact with the lower end of the eight first fixing bolts 33, which can form a secondary axial fastening of the valve body cover 31, offsetting the upward impact force of the high pressure fluid on the valve body cover 31, and also preventing the first fixing bolts 33 from loosening in the vibration environment, ensuring the structural stability of the plug valve under long-term high pressure conditions.

[0050] Furthermore, such as Figure 6 As shown, the control component 4 in the preferred embodiment of this utility model includes a valve stem 41, which is detachably disposed on the upper end face of the guide post 28; a T-shaped groove 42, which is opened on the lower surface of the valve stem 41, and the upper end of the guide post 28 is located in the T-shaped groove 42; and two second fixing bolts 43, which are rotatably disposed on the upper surface of the valve stem 41, and the two second fixing bolts 43 are respectively threadedly connected to the inner side of two fixing thread grooves.

[0051] Furthermore, the guide post 28 and the T-slot 42 are mutually compatible.

[0052] In this embodiment, several preferred embodiments of the control component 4 are given. When an external operating force is applied to the valve stem 41, the valve stem 41 drives the guide post 28 to rotate through the engagement relationship between the T-groove 42 and the guide post 28, and finally drives the plug body 23 to rotate, thereby controlling the working state of the plug valve. Furthermore, as the direct force-bearing component of external operation, the structure of the valve stem 41 can be extended or equipped with a handle or drive device such as a pneumatic or electric actuator according to actual needs. After removing the two second fixing bolts 43 from the fixing thread groove, the valve stem 41 can be removed from the guide post 28. This facilitates the individual disassembly and maintenance of the valve stem 41 without disassembling the entire plug valve, thus reducing the maintenance cost of the plug valve.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high pressure globe valve characterized by, Including valve body (1); A rotatable plug assembly (2) located inside the valve body (1) includes a sealing sleeve (21) detachably located inside the valve body (1); two flow channel holes (22) symmetrically opened on the outside of the sealing sleeve (21), and both flow channel holes (22) coincide with the flow channels on both sides of the valve body (1); a plug body (23) detachably located inside the sealing sleeve (21), and the outside of the plug body (23) is tightly fitted with the inside of the valve body (1) and the inside of the sealing sleeve (21); two sealing rings (24) detachably located on the top and bottom outside of the plug body (23); and a flow hole (25) opened on the outside of the plug body (23), and the specifications and dimensions of the flow hole (25) are the same as the flow channel specifications and dimensions of the valve body (1). A sealing assembly (3) is detachably disposed on the lower end face of the valve body (1); The control component (4) is detachably located on the upper end face of the valve body (23).

2. The high pressure globe valve according to claim 1, wherein, The valve body (1) also includes eight sealing threaded grooves (11), which are arranged in groups of four and are symmetrically and evenly distributed on the lower end face of the valve body (1).

3. The high pressure globe valve of claim 2, wherein, The plug assembly (2) further includes a grease injection groove (26) formed on the lower end face of the plug body (23); The grease injection hole (27) is located on the outside of the plug body (23), and the grease injection hole (27) is connected to the grease injection thread groove (26); A guide post (28) is disposed on the upper end face of the valve body (23), and the control component (4) is disposed on the upper end face of the guide post (28); The grease injection valve (29) is provided on the inside of the grease injection threaded groove (26) and is threadedly connected.

4. The high-pressure plug valve according to claim 3, characterized in that, The sealing sleeve (21) is composed of multiple sealing arcs, and the two flow channel holes (22) are opened on the outside of the two sealing arcs that are perpendicular to the flow channel axis of the valve body (1); Two fixed threaded grooves are symmetrically opened on the upper end face of the guide post (28).

5. The high pressure globe valve of claim 4, wherein, The stopcock (23) is a conical stopcock, and the taper of the stopcock (23) matches the inner side of the valve body (1).

6. The high pressure gate valve of claim 5, wherein, The sealing assembly (3) includes a valve body cover (31) which is detachably disposed on the lower end face of the valve body (1); Two connecting threaded grooves (32) are symmetrically opened on the upper surface of the valve body cover (31); Eight first fixing bolts (33) are symmetrical and rotatable through the valve body cover (31), and the upper ends of the eight first fixing bolts (33) are respectively threaded to the inner side of the eight sealing thread grooves (11); The flange (34) is detachably located between the lower end faces of the eight first fixing bolts (33).

7. The high pressure gate valve according to claim 6, wherein Two reinforcing bolts are rotatably inserted through the lower surface of the flange (34), and the upper ends of the two reinforcing bolts are threadedly connected to the inner side of the two connecting thread grooves (32); The sealing ring (24) located at the bottom of the plug body (23) is in contact with the upper surface of the valve body cover (31), and the lower end of the plug body (23) and the grease injection valve (29) are both located inside the valve body cover (31).

8. The high pressure gate valve according to claim 7, wherein The control component (4) includes a valve stem (41) which is detachably disposed on the upper end face of the guide post (28); A T-shaped groove (42) is formed on the lower surface of the valve stem (41), and the upper end of the guide post (28) is located in the T-shaped groove (42); Two second fixing bolts (43) are rotatably provided on the upper surface of the valve stem (41), and the two second fixing bolts (43) are respectively threadedly connected to the inner side of the two fixing thread grooves.

Images