shutoff valve

Abstract

The utility model provides a kind of stop valve, comprising: valve body component, valve body component has valve cavity and valve port, the diameter of valve port is greater than or equal to 18.5mm;Valve sleeve, and valve body component is connected, the outer diameter of valve sleeve is less than the outer diameter of valve body component;Valve stem, part of valve stem is located in valve sleeve, valve stem can move back and forth along axial direction, one end of valve stem located in valve cavity is connection end;Sealing structure, located in valve cavity and is connected with the connection end of valve stem, the radial dimension of sealing structure is greater than the radial dimension of valve stem and the radial dimension of valve sleeve, valve stem drives sealing structure to move away from or abut valve port, to open and close valve port by sealing structure.Application of the technical solution of the present application, while meeting the demand of large flow through of large size valve port, compared with the technical solution of the size of multiple parts increasing, it is beneficial to reduce manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a gate valve. Background Technology

[0002] With the rapid development of industry, the requirements for fluid flow efficiency in chemical, petroleum, and other large-scale fluid transportation systems are increasing, which necessitates increasing the flow rate of the medium passing through the gate valve. Therefore, it is necessary to increase the valve orifice diameter of the gate valve. To meet the sealing requirements of the large-diameter valve orifice, several components in the gate valve, such as the valve stem used to open and close the valve orifice, the valve sleeve for mounting the valve stem, and the nut at the end of the valve sleeve, need to be enlarged, leading to increased costs. Utility Model Content

[0003] This utility model provides a gate valve that, while meeting the requirement of large flow rate using a large-size valve port, reduces manufacturing costs compared to technical solutions that require increasing the size of multiple parts.

[0004] To achieve the above objectives, this utility model provides a shut-off valve, comprising:

[0005] The valve body component has a valve cavity and a valve port, the diameter of which is greater than or equal to 18.5 mm;

[0006] The valve sleeve is connected to the valve body component, and the outer diameter of the valve sleeve is smaller than the outer diameter of the valve body component.

[0007] The valve stem, part of which is located inside the valve sleeve, can move back and forth axially, and the end of the valve stem located inside the valve cavity is the connecting end;

[0008] The sealing structure is located inside the valve cavity and connected to the valve stem. The radial dimension of the sealing structure is larger than the radial dimension of the valve stem and the radial dimension of the valve sleeve. The valve stem drives the sealing structure to move away from or against the valve port, so as to open and close the valve port through the sealing structure.

[0009] Furthermore, the sealing structure includes a sealing cap, and the connection ends of the sealing cap and valve stem are welded, interference-fitted, or snap-fitted.

[0010] Furthermore, the sealing cap has a groove into which the connecting end of the valve stem is inserted; or, the sealing cap has a through mounting hole with a diameter smaller than that of the valve port, into which the connecting end is inserted, wherein the end face of the connecting end is flush with the surface of the sealing cap, or the end face of the connecting end protrudes from the surface of the sealing cap.

[0011] Furthermore, the sealing structure includes a sealing cover with an annular groove on the side facing the valve port, and the sealing structure also includes an annular sealing gasket installed in the annular groove; wherein, when the sealing gasket abuts against the periphery of the valve port, the sealing structure closes the valve port.

[0012] Furthermore, the sealing gasket is riveted and fixed by the flange structure on the sealing cover; the sealing gasket is made of elastic material, and the periphery of the valve port has a protruding annular sealing rib, which abuts against the sealing gasket to achieve a seal.

[0013] Furthermore, the valve body component includes a valve body structure and a connecting ring. The valve body structure has a valve cavity and a valve port. The connecting ring is fixed to one end of the valve body structure. The connecting ring has a through hole with a diameter smaller than the outer diameter of the valve body structure. The valve sleeve passes through the through hole and is fixedly connected to the connecting ring.

[0014] Furthermore, the outer periphery of the connecting ring is recessed inward to form a limiting step, one end of the valve body structure is matched with the limiting step and welded, and the inner wall of the through hole is welded to the outer wall of the valve sleeve.

[0015] Furthermore, the valve sleeve includes an interconnected open hole and a threaded hole, the minor diameter of which is smaller than the diameter of the open hole, and the threaded hole is connected to the valve cavity; the valve stem includes an interconnected operating section and a threaded section, wherein the operating section is located inside the open hole, the threaded section and the threaded hole are threadedly engaged, and the end of the threaded section located inside the valve cavity is the connecting end.

[0016] Furthermore, the diameter of the operating section is larger than that of the threaded section, the outer wall of the operating section has a sealing groove, and the gate valve also includes a sealing ring, which is installed in the sealing groove.

[0017] Furthermore, the operating section has an operating hole with its opening facing away from the threaded section. The operating hole is used to insert a tool, which is used to rotate the valve stem. Alternatively, the valve stem also includes an extension section connected to the end of the operating section away from the threaded section. The extension section has an operating hole with its opening facing away from the threaded section. The operating hole is used to insert a tool, which is used to rotate the valve stem. Wherein, when the sealing structure is moved to the position furthest from the valve port, the extension section extends out of the valve sleeve.

[0018] Furthermore, when the sealing structure is moved to the position furthest from the valve port, the sealing structure and the valve sleeve come into contact.

[0019] Furthermore, the end of the valve sleeve away from the valve port has external threads, and the gate valve also includes a nut, which is threadedly connected to the valve sleeve to seal the opening of the valve sleeve.

[0020] Furthermore, the bottom or side wall of the nut cavity has annular ribs, which abut against the annular end face of the valve sleeve when the nut and valve sleeve are tightened to achieve a seal.

[0021] Furthermore, the valve body component includes a valve tube and a collar. The outer diameter of the valve tube is larger than the outer diameter of the valve sleeve. The collar is fixed inside the valve tube. The outer wall of the collar and the inner wall of the valve tube are sealed together. The valve cavity is located inside the valve tube, and the valve port is located inside the collar.

[0022] Furthermore, the sidewall of the valve tube has a first annular flange and a second annular flange, the collar has an annular mounting step, and the shut-off valve also includes a valve assembly, a first connecting pipe and a second connecting pipe. One end of the valve assembly is inserted into the hole surrounded by the first annular flange and is fixedly connected to the first annular flange. The first connecting pipe is inserted into the hole surrounded by the second annular flange and is fixedly connected to the second annular flange. The second connecting pipe is inserted into the hole surrounded by the mounting step and is fixedly connected to the mounting step. The second connecting pipe communicates with the valve port.

[0023] Furthermore, the collar and valve tube are welded together, and the outer wall of the collar has an annular mounting groove for placing the welding ring; the gate valve also includes a flange plate, which is welded to the end of the valve tube near the valve port, or the flange plate, the end of the valve tube near the valve port, and the collar are all welded together, or the flange plate is welded to the end of the valve tube away from the valve port.

[0024] Furthermore, the valve body component includes a valve body structure integrally formed by stamping and cold forging. The valve body structure includes a valve body, a first convex tube, and a second convex tube. The valve body has a valve cavity, a valve port, and an annular mounting step. The first convex tube and the second convex tube are both located on the side wall of the valve body. The shut-off valve also includes a valve assembly, a first connecting pipe, and a second connecting pipe. One end of the valve assembly is inserted into the hole of the first convex tube and fixedly connected to the first convex tube. The first connecting pipe is inserted into the second convex tube and fixedly connected to the second convex tube. The second connecting pipe is inserted into the hole surrounded by the mounting step and fixedly connected to the mounting step. The second connecting pipe communicates with the valve port.

[0025] In this design, the valve stem, acting as a transmission component, drives the sealing structure in reciprocating axial linear motion to open and close the valve port. By designing the valve stem and sealing structure separately, while meeting the high flow rate requirements of large-sized valve ports, only the sealing structure needs to increase in size as the valve port increases. This avoids requiring a corresponding increase in the dimensions of the valve stem, valve sleeve, and other structures, thus reducing the overall size of the gate valve and minimizing unnecessary material consumption. Therefore, this design satisfies the high flow rate requirements of the gate valve while saving manufacturing costs, simplifying the processing technology, and improving production efficiency. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0027] Figure 1 A cross-sectional view of the shut-off valve provided in Embodiment 1 of this utility model is shown;

[0028] Figure 2 It shows Figure 1 A magnified view of a portion of the stop valve A.

[0029] Figure 3 A cross-sectional view of the shut-off valve provided in Embodiment 2 of this utility model is shown;

[0030] Figure 4 A cross-sectional view of the shut-off valve provided in Embodiment 3 of this utility model is shown;

[0031] Figure 5 A cross-sectional view of the shut-off valve provided in Embodiment 4 of this utility model is shown.

[0032] The above figures include the following reference numerals:

[0033] 10. Valve body components;

[0034] 11. Valve cavity;

[0035] 12. Valve port; 121. Annular sealing rib;

[0036] 13. Valve body structure; 131. Valve body; 132. First protruding tube; 133. Second protruding tube;

[0037] 14. Connecting ring;

[0038] 15. Limiting step;

[0039] 16. Valve pipe; 161. First annular flange; 162. Second annular flange;

[0040] 17. Ring;

[0041] 18. Assemble the steps;

[0042] 20. Valve sleeve;

[0043] 21. Plain hole; 22. Threaded hole; 23. External thread;

[0044] 30. Valve stem;

[0045] 31. Operating section; 32. Threaded section; 33. Extended section; 34. Operating hole;

[0046] 40. Sealed structure;

[0047] 41. Sealing cap; 42. Sealing gasket;

[0048] 51. Sealing ring; 52. Nut; 521. Annular rib; 53. Valve assembly; 54. First connecting pipe; 55. Second connecting pipe; 56. Flange plate. Detailed Implementation

[0049] The technical solutions in at least one embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one embodiment is merely illustrative and is not intended to limit this application or its applications. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the scope of protection of this application.

[0050] like Figures 1 to 5 As shown, an embodiment of this utility model provides a shut-off valve, comprising:

[0051] Valve body component 10, which has a valve cavity 11 and a valve port 12, wherein the diameter of the valve port 12 is greater than or equal to 18.5 mm;

[0052] Valve sleeve 20 is connected to valve body component 10, and the outer diameter of valve sleeve 20 is smaller than the outer diameter of valve body component 10.

[0053] Valve stem 30, a portion of which is located within valve sleeve 20, valve stem 30 can move back and forth axially, and the end of valve stem 30 located within valve cavity 11 is a connecting end;

[0054] The sealing structure 40 is located inside the valve cavity 11 and connected to the connecting end of the valve stem 30. The radial dimension of the sealing structure 40 is greater than the radial dimension of the valve stem 30 and the radial dimension of the valve sleeve 20. The valve stem 30 drives the sealing structure 40 to move away from or abut against the valve port 12, so as to open and close the valve port 12 through the sealing structure 40.

[0055] In this design, the valve stem 30 serves as a transmission component, driving the sealing structure 40 to perform reciprocating axial linear motion to open and close the valve port 12. For valve port 12 diameters greater than or equal to 18.5 mm, the valve stem 30 and sealing structure 40 are designed separately. To meet the high flow rate requirements of the large-sized valve port 12 and ensure sealing, only the sealing structure 40 needs to increase in size as the valve port 12 increases. This avoids requiring a corresponding increase in the dimensions of the valve stem 30, valve sleeve 20, and other structures, thus reducing the overall size of the gate valve and minimizing unnecessary material consumption. Therefore, this design satisfies the high flow rate requirements of the gate valve while saving manufacturing costs, simplifying the processing technology, and improving production efficiency.

[0056] like Figure 1 As shown, the sealing structure 40 includes a sealing cover 41, and the connection end of the sealing cover 41 and the valve stem 30 is welded, interference-fitted, or snap-fitted.

[0057] If the connection between the sealing cover 41 and the valve stem 30 is welded, the connection strength between the sealing cover 41 and the valve stem 30 can be improved, which is especially suitable for high-pressure systems. An interference fit utilizes the elastic-plastic deformation of the material to achieve a tight connection. Using an interference fit at the connection between the sealing cover 41 and the valve stem 30 simplifies the assembly process while ensuring the reliability of the connection between the sealing cover 41 and the valve stem 30. A snap-fit ​​connection typically uses mechanical devices such as clips and snap rings for fixation, which is quick to operate, convenient for on-site installation and adjustment, and facilitates individual inspection and replacement of the sealing cover 41 and the valve stem 30, improving maintenance efficiency. Through these connection methods, a reliable sealing connection is formed between the sealing cover 41 and the valve stem 30, preventing media leakage and ensuring the safe operation of the gate valve under various working conditions. Furthermore, the diversity of connection methods makes the gate valve design more flexible and can be adapted to the needs of specific application scenarios.

[0058] like Figure 1 , Figure 3 As shown, the sealing cap 41 has a groove, and the connecting end of the valve stem 30 is inserted into the groove;

[0059] Alternatively, the sealing cap 41 has a through mounting hole with a diameter smaller than that of the valve port 12. The connecting end is inserted into the mounting hole, wherein the end face of the connecting end is flush with the surface of the sealing cap 41, or the end face of the connecting end protrudes from the surface of the sealing cap 41.

[0060] In this embodiment, the sealing cover 41 is provided with a groove or a through mounting hole. The connecting end of the valve stem 30 is inserted into the groove of the sealing cover 41 or passes through the mounting hole. The diameter of the mounting hole is smaller than the diameter of the valve port 12, which facilitates a tight fit between the connecting end of the valve stem 30 and the mounting hole. At the same time, it avoids the size of the valve stem 30 from increasing with the increase of the valve port 12, reducing unnecessary material consumption and lowering production costs.

[0061] The end face of the connecting end can be flush with the surface of the sealing cover 41 or protrude from the surface of the sealing cover 41. The setting where the end face of the connecting end protrudes from the surface of the sealing cover 41 further ensures a stable connection between the valve stem 30 and the sealing cover 41, enhances the sealing performance and connection strength, and improves the product performance of the gate valve.

[0062] like Figure 1 As shown, the sealing structure 40 includes a sealing cover 41, which has an annular groove on the side facing the valve port 12. The sealing structure 40 also includes an annular sealing gasket 42, which is installed in the annular groove. When the sealing gasket 42 abuts against the periphery of the valve port 12, the sealing structure 40 closes the valve port 12.

[0063] The design of the annular groove helps to accurately position and securely fix the sealing gasket 42, preventing the sealing gasket 42 from shifting or being damaged under high pressure or vibration, thus ensuring the long-term stability and reliability of the shut-off valve and extending its service life.

[0064] The sealing gasket 42 is installed in the annular groove. When the sealing gasket 42 abuts against the periphery of the valve port 12, the sealing structure 40 can tightly close the valve port 12. This setting simplifies the assembly process of the sealing structure 40, ensures the sealing performance of the gate valve in the working state, and at the same time simplifies the assembly process of the sealing structure 40, improving the production efficiency and product performance of the gate valve.

[0065] like Figure 1 As shown, the sealing gasket 42 is riveted and fixed by the flange structure on the sealing cover 41; the sealing gasket 42 is made of elastic material, and the periphery of the valve port 12 has a protruding annular sealing rib 121, which abuts against the sealing gasket 42 to achieve sealing.

[0066] In this embodiment, the sealing gasket 42 is riveted and fixed by the flange structure on the sealing cover 41, which simplifies the assembly process and ensures that the sealing gasket 42 has a stable and reliable position under working conditions, avoiding displacement caused by vibration or pressure fluctuations.

[0067] The sealing gasket 42 is made of elastic material, giving it excellent deformation and resilience, allowing it to quickly return to its original shape after being compressed. The valve port 12 has a protruding annular sealing rib 121 around its periphery. This annular sealing rib 121 tightly abuts against the sealing gasket 42, utilizing the deformation characteristics of the elastic material to form an effective seal at the valve port 12, preventing fluid leakage. This design improves the sealing performance of the gate valve while reducing the requirements for machining precision, thus enhancing the operational safety and service life of the gate valve.

[0068] like Figure 1 , Figure 3 As shown, the valve body component 10 includes a valve body structure 13 and a connecting ring 14. The outer diameter of the valve body structure 13 is larger than the outer diameter of the valve sleeve 20. The valve body structure 13 has a valve cavity 11 and a valve port 12. The connecting ring 14 is fixed to one end of the valve body structure 13. The connecting ring 14 has a through hole with a diameter smaller than the outer diameter of the valve body structure 13. The valve sleeve 20 passes through the through hole and is fixedly connected to the connecting ring 14.

[0069] Under normal circumstances, the valve sleeve 20 can be fitted inside the valve body structure 13, and the outer wall of the valve sleeve 20 can be directly connected to the inner wall of the valve body structure 13. However, under high flow conditions, the size of the valve body structure 13 increases with the increase of the valve port 12, while the size of the valve sleeve 20 does not need to increase accordingly. This results in a large gap between the valve body structure 13 and the valve sleeve 20, making it difficult to connect directly. Therefore, a connecting ring 14 needs to be set between the valve body structure 13 and the valve sleeve 20.

[0070] The connecting ring 14 serves as an intermediate structure, acting as a transitional connection and ensuring an effective connection between the valve sleeve 20 and the valve body structure 13. The connecting ring 14 also reduces the direct contact between the valve body structure 13 and the valve sleeve 20, lowering the processing difficulty and facilitating subsequent maintenance and disassembly operations, thereby improving the overall performance of the gate valve.

[0071] Meanwhile, by limiting the diameter of the through hole to be smaller than the outer diameter of the valve body structure 13, the selection of a smaller valve sleeve 20 is accommodated, making the structure more compact and avoiding unnecessary material waste. At the same time, the sealing connection between the connecting ring 14 and the valve sleeve 20 is guaranteed, which improves the overall structural strength and sealing performance of the gate valve.

[0072] like Figure 1 , Figure 3 As shown, the outer periphery of the connecting ring 14 is recessed inward to form a limiting step 15. One end of the valve body structure 13 is limited and welded to the limiting step 15. The inner wall of the through hole is welded to the outer wall of the valve sleeve 20.

[0073] In this embodiment, the outer periphery of the connecting ring 14 has an annular limiting step 15. The limiting step 15 plays a positioning role during the assembly of the valve body structure 13, ensuring that one end of the valve body structure 13 is accurately aligned and fits with the limiting step 15. It is then fixed by welding. By designing this overlapping structure of the limiting step 15, a more reliable sealing effect is achieved, while simplifying the assembly process, reducing production costs, and improving the overall performance and operational reliability of the gate valve.

[0074] The inner wall of the through hole is welded to the outer wall of the valve sleeve 20, which further enhances the mechanical strength between the components and improves the sealing performance at the connection.

[0075] like Figure 1 , Figure 2As shown, the valve sleeve 20 includes a smooth hole 21 and a threaded hole 22 that are interconnected. The minor diameter of the threaded hole 22 is smaller than the diameter of the smooth hole 21, and the threaded hole 22 is connected to the valve cavity 11. The valve stem 30 includes an operating section 31 and a threaded section 32 that are interconnected. The operating section 31 is located inside the smooth hole 21, and the threaded section 32 is threadedly engaged with the threaded hole 22. The end of the threaded section 32 located inside the valve cavity 11 is the connecting end. The movement of the operating section 31 within the smooth hole 21 is not affected by the thread, thereby reducing the movement resistance and allowing the valve stem 30 to move more smoothly during operation. This makes the opening and closing of the valve port 12 smoother, and also shortens the thread range on the valve sleeve 20 and the valve stem 30, reducing the machining difficulty and improving production efficiency.

[0076] The precise fit between the threaded section 32 and the threaded hole 22 ensures the safety and tightness of the connection between the valve stem 30 and the valve sleeve 20, and enhances the sealing performance of the gate valve under high flow conditions.

[0077] Under high flow conditions, the stroke of the valve stem 30 needs to be increased. Since the diameter of the operating section 31 is larger than the diameter of the threaded section 32, the specifications of the valve stem 30 can be kept unchanged while increasing the stroke. This avoids increasing the length of the threaded section 32 and the threaded hole 22, simplifies the processing technology, saves material consumption, and reduces production costs. Figure 1 , Figure 4 As shown, the diameter of the operating section 31 is larger than the diameter of the threaded section 32. The outer wall of the operating section 31 has a sealing groove. The shut-off valve also includes a sealing ring 51, which is installed in the sealing groove.

[0078] A sealing groove is provided on the outer wall of the operating section 31 to accommodate the sealing ring 51, so that the sealing ring 51 can form an effective seal with the inner wall of the valve sleeve 20 during the closing or opening of the gate valve, thereby enhancing the sealing performance of the gate valve and preventing media leakage. At the same time, the sealing design of the sealing ring 51 in conjunction with the sealing groove facilitates the timely maintenance and replacement of the sealing ring 51, ensuring the sealing performance of the gate valve, simplifying the installation process and reducing maintenance costs.

[0079] The diameter of the operating section 31 is larger than that of the threaded section 32, which makes it easier for the sealing ring 51 installed in the sealing groove to form a tight contact with the inner wall of the valve sleeve 20, thereby improving the sealing performance of the gate valve. In addition, the smaller diameter of the threaded section 32 reduces material consumption and lowers production costs.

[0080] like Figure 1 As shown, the operating section 31 has an operating hole 34, the opening of the operating hole 34 is away from the threaded section 32, the operating hole 34 is used to insert a tool, and the tool is used to rotate the valve stem 30.

[0081] Or such as Figure 3As shown, the valve stem 30 also includes an extension section 33, which is connected to the end of the operating section 31 away from the threaded section 32. The extension section 33 has an operating hole 34, the opening of which is opposite to the threaded section 32. The operating hole 34 is used to insert a tool for rotating the valve stem 30. When the sealing structure 40 is moved to the position furthest from the valve port 12, the extension section 33 extends out of the valve sleeve 20.

[0082] In this embodiment, the operating section 31 of the valve stem 30 is provided with an operating hole 34. The opening direction of the operating hole 34 is opposite to that of the threaded section 32, and it is used to insert tools, such as hex wrenches, to facilitate the rotation of the valve stem 30.

[0083] In the prior art, when the sealing structure 40 moves to the limit position closest to the valve port 12, the operating hole 34 provided on the valve stem 30 is too far from the upper port of the valve sleeve 20. Conventional tools, due to their own structural limitations, will be unable to extend into the operating hole 34 due to interference with the valve sleeve 20.

[0084] Therefore, an extension section 33 is provided at the end of the operating section 31 that is far from the threaded section 32, and the operating hole 34 is located in the extension section 33. When the sealing structure 40 moves to the extreme position farthest from the valve port 12, the extension section 33 extends out of the valve sleeve 20. This design provides sufficient space for the tool to extend into the operating hole 34, solving the problem that the tool cannot extend into the operating hole 34 to rotate the valve stem 30 when the operating hole 34 is far from the upper port of the valve sleeve 20.

[0085] When the sealing structure 40 is moved to its furthest position from the valve port 12, the sealing structure 40 and the valve sleeve 20 come into contact. Therefore, the maximum stroke of the sealing structure 40 can be limited by the valve sleeve 20.

[0086] like Figure 2 As shown, the end of the valve sleeve 20 away from the valve port 12 has an external thread 23. The shut-off valve also includes a nut 52, which is threadedly connected to the valve sleeve 20 to seal the opening of the valve sleeve 20.

[0087] The threaded connection provides mechanical locking force, which not only simplifies the assembly process of the gate valve but also enhances its sealing performance, ensuring that no media leakage occurs during use. This design also facilitates maintenance and replacement. When it is necessary to inspect or replace the seals, simply unscrew the nut 52 without disassembling the entire gate valve, which greatly saves maintenance time and costs.

[0088] like Figure 2 As shown, the bottom wall or side wall of the cavity of the nut 52 has an annular rib 521. When the nut 52 and the valve sleeve 20 are tightened, the annular rib 521 and the annular end face of the valve sleeve 20 abut against each other to achieve a seal.

[0089] By adding an annular rib 521 to the bottom or side wall of the cavity of the nut 52, the annular rib 521 abuts against the end face of the valve sleeve 20 when tightened, which improves the sealing performance between the nut 52 and the valve sleeve 20, effectively prevents media leakage, improves the reliability and safety of the gate valve, reduces maintenance costs caused by poor sealing, and extends the service life of the gate valve.

[0090] Specifically, when the valve stem 30 includes the extended section 33, the nut 52 has a receiving groove. When the sealing structure 40 moves to its furthest position from the valve port 12, the portion of the extended section 33 extending out of the valve sleeve 20 is located within the receiving groove. This design ensures the sealing performance of the shut-off valve, and the receiving groove provides space for the valve stem 30 to move, preventing damage caused by collisions between structures.

[0091] like Figure 4 As shown, the valve body component 10 includes a valve tube 16 and a collar 17. The outer diameter of the valve tube 16 is larger than the outer diameter of the valve sleeve 20. The collar 17 is fixed inside the valve tube 16. The outer wall of the collar 17 and the inner wall of the valve tube 16 are sealed together. The valve cavity 11 is located inside the valve tube 16, and the valve port 12 is located inside the collar 17.

[0092] A valve tube 16 and a collar 17 are respectively provided, and the outer diameter of the valve tube 16 is larger than the outer diameter of the valve sleeve 20. The outer wall of the collar 17 and the inner wall of the valve tube 16 are sealed together. The collar 17 provides a sealing contact plane for the sealing structure 40. The sealing structure 40 abuts against the upper end face of the collar 17 to realize the opening and closing of the valve port 12, ensuring the sealing performance when the valve port 12 is closed.

[0093] Within a certain range, the requirements for high-flow-rate conditions can be met by simply changing the specifications of the collar 17, without having to change the size of the valve pipe 16 at the same time. This optimizes the processing technology and improves the applicability of the shut-off valve.

[0094] like Figure 4 As shown, the sidewall of valve pipe 16 has a first annular flange 161 and a second annular flange 162, and collar 17 has an annular mounting step 18. The shut-off valve also includes a valve assembly 53, a first connecting pipe 54 and a second connecting pipe 55. One end of the valve assembly 53 is inserted into the hole surrounded by the first annular flange 161 and is fixedly connected to the first annular flange 161. The first connecting pipe 54 is inserted into the hole surrounded by the second annular flange 162 and is fixedly connected to the second annular flange 162. The second connecting pipe 55 is inserted into the hole surrounded by the mounting step 18 and is fixedly connected to the mounting step 18. The second connecting pipe 55 communicates with the valve port 12.

[0095] By setting the first annular flange 161, the second annular flange 162, and the assembly steps 18 on the collar 17 respectively, precise alignment and stable connection between the various components are achieved. The independent assembly of each component reduces the complexity of the processing, saves manufacturing costs, and eliminates the need to disassemble the entire shut-off valve during subsequent maintenance or component replacement, thus reducing maintenance costs and time.

[0096] During assembly, the first annular flange 161, the second annular flange 162, and the assembly step 18 not only provide stable support for the valve assembly 53, the first connecting pipe 54, and the second connecting pipe 55, but also ensure the sealing performance between the valve assembly 53, the first connecting pipe 54, the second connecting pipe 55 and the valve pipe 16, thereby improving the overall reliability and safety of the shut-off valve.

[0097] like Figure 4 As shown, the collar 17 and the valve pipe 16 are welded together. The outer wall of the collar 17 has an annular mounting groove for placing the welding ring. The gate valve also includes a flange plate 56, which is welded to the end of the valve pipe 16 near the valve port 12, or the flange plate 56, the end of the valve pipe 16 near the valve port 12, and the collar 17 are all welded together, or the flange plate 56 is welded to the end of the valve pipe 16 away from the valve port 12.

[0098] In this embodiment, the collar 17 and the valve pipe 16 are fixed by welding. The outer wall of the collar 17 is designed with an annular mounting groove. This structure is used to house the welding ring, ensuring welding strength and sealing performance. The flange plate 56 connects the valve body component 10 and the connecting pipe, achieving a stable connection and improving the sealing performance and service life of the gate valve. The flange plate 56 can be used to connect with other structures, facilitating the installation of the gate valve.

[0099] like Figure 5 As shown, the valve body component 10 includes a valve body structure 13 integrally formed by stamping and cold forging. The valve body structure 13 includes a valve body 131, a first protrusion tube 132 and a second protrusion tube 133. The valve body 131 has a valve cavity 11, a valve port 12 and an annular mounting step 18. The first protrusion tube 132 and the second protrusion tube 133 are both located on the side wall of the valve body 131. The shut-off valve also includes a valve assembly 53, a first connecting pipe 54 and a second connecting pipe 55. One end of the valve assembly 53 is inserted into the hole of the first protrusion tube 132 and is fixedly connected to the first protrusion tube 132. The first connecting pipe 54 is inserted into the second protrusion tube 133 and is fixedly connected to the second protrusion tube 133. The second connecting pipe 55 is inserted into the hole surrounded by the mounting step 18 and is fixedly connected to the mounting step 18. The second connecting pipe 55 communicates with the valve port 12.

[0100] In the prior art, in order to connect valve components or other parts such as pipes, a flange structure is often set on the valve pipe 16. However, under high pressure or high flow conditions, the flange structure is prone to weld leakage due to insufficient overlap length.

[0101] In this embodiment, the valve body structure 13 adopts a stamping and cold forging integrated forming process, which reduces the generation of welds, ensures the sealing of the valve cavity 11, reduces material waste, and lowers production costs. Compared with the traditional flanged structure, the arrangement of the first protrusion tube 132 and the second protrusion tube 133 increases the welding overlap length, avoids leakage at the connection, and allows the arrangement of the first protrusion tube 132 and the second protrusion tube 133 to be adjusted, reducing the overall height of the valve body 131, thereby reducing the size of the shut-off valve.

[0102] The above descriptions are merely some embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0103] The technical features of the embodiments described above 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 the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification.

[0104] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0105] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0106] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0107] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0108] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

Claims

1. A shut-off valve, characterized in that, include: A valve body component (10) having a valve cavity (11) and a valve port (12) having a diameter greater than or equal to 18.5 mm; A valve sleeve (20) is connected to the valve body component (10), and the outer diameter of the valve sleeve (20) is smaller than the outer diameter of the valve body component (10); A valve stem (30) is located in the valve sleeve (20), and the valve stem (30) can move back and forth along the axial direction. One end of the valve stem (30) located in the valve cavity (11) is the connecting end. A sealing structure (40) is located inside the valve cavity (11) and connected to the connecting end of the valve stem (30). The radial dimension of the sealing structure (40) is greater than the radial dimension of the valve stem (30) and the radial dimension of the valve sleeve (20). The valve stem (30) drives the sealing structure (40) to move away from or abut against the valve port (12) to open or close the valve port (12).

2. The shut-off valve according to claim 1, characterized in that, The sealing structure (40) includes a sealing cover (41), and the connection end of the sealing cover (41) and the valve stem (30) is welded, interference-fitted, or snap-fitted. The sealing cap (41) has a groove, and the connecting end of the valve stem (30) is inserted into the groove; or, the sealing cap (41) has a through mounting hole, the diameter of which is smaller than the diameter of the valve port (12), and the connecting end is inserted into the mounting hole, wherein the end face of the connecting end is flush with the surface of the sealing cap (41), or the end face of the connecting end protrudes from the surface of the sealing cap (41).

3. The shut-off valve according to claim 1, characterized in that, The sealing structure (40) includes a sealing cover (41) having an annular groove on the side facing the valve port (12), and the sealing structure (40) also includes an annular sealing gasket (42) installed in the annular groove; wherein, when the sealing gasket (42) abuts against the periphery of the valve port (12), the sealing structure (40) closes the valve port (12).

4. The shut-off valve according to claim 3, characterized in that, The sealing gasket (42) is riveted and fixed by the flange structure on the sealing cover (41); the sealing gasket (42) is made of elastic material, and the periphery of the valve port (12) has a protruding annular sealing rib (121), which abuts against the sealing gasket (42) to achieve sealing.

5. The shut-off valve according to claim 1, characterized in that, The valve body component (10) includes a valve body structure (13) and a connecting ring (14). The valve body structure (13) has the valve cavity (11) and the valve port (12). The connecting ring (14) is fixed to one end of the valve body structure (13). The connecting ring (14) has a through hole. The diameter of the through hole is smaller than the outer diameter of the valve body structure (13). The valve sleeve (20) passes through the through hole and is fixedly connected to the connecting ring (14).

6. The shut-off valve according to claim 5, characterized in that, The outer periphery of the connecting ring (14) is recessed inward to form a limiting step (15). One end of the valve body structure (13) is limited and welded to the limiting step (15). The inner wall of the through hole is welded to the outer wall of the valve sleeve (20).

7. The shut-off valve according to claim 1, characterized in that, The valve sleeve (20) includes an interconnected aperture (21) and a threaded hole (22), the minor diameter of which is smaller than the diameter of which is smaller than that of which is smaller than that of which is smaller than that of which is smaller than that of which is smaller than that of which is smaller than that of which is smaller than that of which is smaller than that of which is smaller than that of which is smaller than that of which is smaller than that of which is smaller than that of which is smaller than that of which is smaller than that of which is larger ...

8. The shut-off valve according to claim 7, characterized in that, The operating section (31) has an operating hole (34) with the opening of the operating hole (34) facing away from the threaded section (32). The operating hole (34) is used to insert a tool for rotating the valve stem (30). Alternatively, the valve stem (30) may further include an extension section (33) connected to the operating section (31) at one end away from the threaded section (32). The extension section (33) has an operating hole (34) with the opening of the extension section (33) facing away from the threaded section (32). The operating hole (34) is used to insert a tool for rotating the valve stem (30). The extension section (33) extends beyond the valve sleeve (20) when the sealing structure (40) is moved to the position furthest from the valve port (12).

9. The shut-off valve according to claim 1, characterized in that, When the sealing structure (40) is moved to the position furthest from the valve port (12), the sealing structure (40) and the valve sleeve (20) come into contact.

10. The shut-off valve according to claim 1, characterized in that, The valve sleeve (20) has an external thread (23) at one end away from the valve port (12), and the shut-off valve also includes a nut (52) that is threadedly connected to the valve sleeve (20) to seal the opening of the valve sleeve (20).

11. The shut-off valve according to claim 10, characterized in that, The bottom or side wall of the cavity of the nut (52) has an annular rib (521). When the nut (52) and the valve sleeve (20) are tightened, the annular rib (521) and the annular end face of the valve sleeve (20) abut against each other to achieve a seal.

12. The shut-off valve according to claim 1, characterized in that, The valve body component (10) includes a valve tube (16) and a collar (17). The outer diameter of the valve tube (16) is larger than the outer diameter of the valve sleeve (20). The collar (17) is fixed inside the valve tube (16). The outer wall of the collar (17) and the inner wall of the valve tube (16) are sealed together. The valve cavity (11) is located inside the valve tube (16), and the valve port (12) is located inside the collar (17).

13. The shut-off valve according to claim 12, characterized in that, The valve tube (16) has a first annular flange (161) and a second annular flange (162) on its side wall. The collar (17) has an annular mounting step (18). The shut-off valve also includes a valve assembly (53), a first connecting pipe (54), and a second connecting pipe (55). One end of the valve assembly (53) is inserted into the hole surrounded by the first annular flange (161) and is fixedly connected to the first annular flange (161). The first connecting pipe (54) is inserted into the hole surrounded by the second annular flange (162) and is fixedly connected to the second annular flange (162). The second connecting pipe (55) is inserted into the hole surrounded by the mounting step (18) and is fixedly connected to the mounting step (18). The second connecting pipe (55) communicates with the valve port (12).

14. The shut-off valve according to claim 12, characterized in that, The collar (17) and the valve tube (16) are welded together. The outer wall of the collar (17) has an annular mounting groove for placing the welding ring. The shut-off valve also includes a flange plate (56). The flange plate (56) is welded to the end of the valve tube (16) near the valve port (12), or the flange plate (56), the end of the valve tube (16) near the valve port (12), and the collar (17) are all welded together, or the flange plate (56) is welded to the end of the valve tube (16) away from the valve port (12).

15. The shut-off valve according to claim 1, characterized in that, The valve body component (10) includes a valve body structure (13) integrally formed by stamping and cold forging. The valve body structure (13) includes a valve body (131), a first protrusion (132), and a second protrusion (133). The valve body (131) has the valve cavity (11), the valve port (12), and an annular mounting step (18). The first protrusion (132) and the second protrusion (133) are both located on the side wall of the valve body (131). The shut-off valve also includes a valve assembly (53), the first valve assembly (132), and the second valve assembly (133). A first connector (54) and a second connector (55) are provided. One end of the valve assembly (53) is inserted into the hole of the first convex tube (132) and fixedly connected to the first convex tube (132). The first connector (54) is inserted into the second convex tube (133) and fixedly connected to the second convex tube (133). The second connector (55) is inserted into the hole surrounding the assembly step (18) and fixedly connected to the assembly step (18). The second connector (55) is connected to the valve port (12).

Images