Threaded plug-in type manual stop valve

Abstract

The utility model relates to the field of valves, and particularly discloses a threaded plug-in type manual stop valve which comprises a valve body, a valve rod and a valve core, a valve head is arranged on the inner side of the top end of the valve body, a nut is in threaded connection with the outer side of the top end of the valve head, and the bottom end of the valve rod penetrates through the nut and the valve head and extends to the inner side of the top end of the valve body. The inner side of the top end of the valve element is in threaded connection with the outer side of the bottom end of the valve rod, the outer side of the top end of the valve element is slidably connected with a threaded sleeve, the outer side of the top end of the threaded sleeve is in threaded connection with the inner side of the bottom end of the valve head, and the outer side of the bottom end of the threaded sleeve is in threaded connection with the inner side of the top end of the valve body. According to the threaded plug-in type manual stop valve, the threaded sleeve is in reliable threaded connection with the valve element in a matched mode, the adjusting action of the valve rod is stable and accurate, accurate control over the position of the valve rod can be conveniently achieved by rotating the nut, and therefore the opening degree of the valve is accurately adjusted.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a threaded cartridge manual shut-off valve. Background Technology

[0002] Gate valves have been widely used in pipelines of various industries and under various working conditions to cut off or connect pipeline media, such as in recirculation equipment, gas supply, cooling and refrigeration systems, boiler steam systems, hot oil systems and other pipelines with nominal pressure of 1.6 to 35.0 MPa and working temperature of 200 to 200°C, to cut off or connect pipeline media.

[0003] However, the working environment in the above-mentioned fields is relatively harsh. Gate valves often experience unstable valve stem adjustment due to excessive pressure, making it impossible to achieve precise control of the valve stem position and thus unable to accurately adjust the valve opening. Utility Model Content

[0004] To address the problem in existing technologies where excessive pressure in gate valves often leads to unstable valve stem adjustment, resulting in an inability to achieve precise control of the valve stem position and thus accurately adjust the valve opening, this utility model provides a threaded cartridge manual gate valve.

[0005] The technical solution adopted in this utility model is:

[0006] A threaded cartridge manual shut-off valve includes a valve body, a valve stem, and a valve core. A valve head is located on the inner side of the top of the valve body. A nut is threadedly connected to the outer side of the top of the valve head. The bottom end of the valve stem extends through the nut and the valve head to the inner side of the top of the valve body. The inner side of the top of the valve core is threadedly connected to the outer side of the bottom end of the valve stem. A threaded sleeve is slidably connected to the outer side of the top of the valve core. The outer side of the top of the threaded sleeve is threadedly connected to the inner side of the bottom end of the valve head. The outer side of the bottom end of the threaded sleeve is threadedly connected to the inner side of the top of the valve body.

[0007] Preferably, the valve head has a step on the inner side of its top end, and a gasket is provided between the top surface of the valve head and the bottom surface of the top end of the nut. The bottom inner side of the gasket extends downward to the step, and an O-ring is provided between the bottom surface of the downwardly extended portion of the gasket and the top surface of the step.

[0008] Preferably, the valve head has a second step and a third step from bottom to top on the inner side of the bottom end, the outer side of the top end of the threaded sleeve is threaded to the side of the second step, a washer is provided between the top surface of the threaded sleeve and the top surface of the second step, and a limiting part adapted to the third step is provided in the middle of the valve stem.

[0009] Preferably, the valve body has a step four on the inner side of the top end, and the valve head has a step five on the outer side of the bottom end that matches the step four. The side of the step five is provided with a groove one, and an O-ring seal two is provided in the groove one.

[0010] Preferably, the valve body has a groove 2 on the outer side of its top end, and a retaining ring and an O-ring 3 are arranged sequentially from top to bottom in the groove 2.

[0011] Preferably, the inner side of the threaded sleeve is hexagonal, and the outer shape of the top of the valve core is adapted to the inner side of the threaded sleeve.

[0012] Preferably, the valve body extends inward from the inner side of the bottom end to form a valve port, and the outer diameter of the valve core gradually decreases from top to bottom to form an inclined surface. When the valve core descends, the inclined surface cooperates with the valve port to form a seal.

[0013] The beneficial effects of this utility model are:

[0014] 1. The threaded cartridge manual shut-off valve of this utility model has a reliable threaded connection between the threaded sleeve and the valve core, which makes the adjustment action of the valve stem stable and precise. It is easy to achieve precise control of the valve stem position by rotating the nut, thereby accurately adjusting the valve opening.

[0015] 2. The sealing ring with multiple seals can fill the sealing gap by its own elastic deformation, which can effectively prevent fluid leakage. Whether it is dynamic sealing or static sealing, it can play a good role and ensure the sealing performance of the valve under different operating conditions.

[0016] 3. The combination of gaskets, washers, and retaining rings further enhances the sealing effect, disperses pressure, and reduces the risk of media leakage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the threaded cartridge manual shut-off valve along one side of the axial direction in an embodiment of this utility model.

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body along one side of the axial direction in an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the valve stem structure in an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the valve core along one side of the axial direction in an embodiment of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the valve head along one side of the axial direction in an embodiment of this utility model;

[0022] Figure 6This is a schematic diagram of the cross-sectional structure of the nut along one side of the axial direction in an embodiment of this utility model;

[0023] Figure 7 This is a schematic diagram of the cross-sectional structure of the threaded sleeve along one side of the axial direction in an embodiment of this utility model;

[0024] Figure 8 This is a schematic diagram of the cross-sectional structure of the gasket along one side of the axial direction in an embodiment of this utility model;

[0025] Reference numerals: 10, valve stem; 20, nut; 30, gasket; 31, washer; 32, retaining ring; 40, O-ring one; 41, O-ring two; 42, O-ring three; 50, valve head; 51, step one; 52, step two; 53, step three; 54, step five; 55, groove one; 60, threaded sleeve; 70, valve body; 71, step four; 72, groove two; 80, valve core. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Example

[0028] like Figures 1 to 7 As shown, a threaded cartridge manual shut-off valve includes a valve body 70, a valve stem 10, and a valve core 80. A valve head 50 is provided on the inner side of the top of the valve body 70. A nut 20 is threadedly connected to the outer side of the top of the valve head 50. The bottom end of the valve stem 10 extends through the nut 20 and the valve head 50 to the inner side of the top of the valve body 70. The inner side of the top of the valve core 80 is threadedly connected to the outer side of the bottom end of the valve stem 10. A threaded sleeve 60 is slidably connected to the outer side of the top of the valve core 80. This slidable connection limits the valve core 80 to slide up and down along the axial direction of the threaded sleeve 60. The outer side of the top of the threaded sleeve 60 is threadedly connected to the inner side of the bottom end of the valve head 50, and the outer side of the bottom end of the threaded sleeve 60 is threadedly connected to the inner side of the top of the valve body 70.

[0029] The threaded sleeve 60 and the valve core 80 have a reliable threaded connection, which makes the adjustment action of the valve stem 10 stable and precise. It is easy to achieve precise control of the position of the valve stem 10 by rotating the nut 20, thereby accurately adjusting the valve opening.

[0030] In one embodiment, such as Figure 1 , Figure 5 and Figure 8 As shown, the valve head 50 has a step 51 on the inner side of its top end. A gasket 30 is provided between the top surface of the valve head 50 and the bottom surface of the top end of the nut 20. The bottom inner side of the gasket 30 extends downward to the step 51. An O-ring 40 is provided between the bottom surface of the downwardly extended portion of the gasket 30 and the top surface of the step 51.

[0031] In one embodiment, such as Figure 1 , Figure 5 and Figure 7 As shown, the valve head 50 has a second step 52 and a third step 53 on the inner side of its bottom end from bottom to top. The outer side of the top end of the threaded sleeve 60 is threadedly connected to the side of the second step 52. A washer 31 is provided between the top surface of the threaded sleeve 60 and the top surface of the second step 52. The valve stem 10 has a limiting part in the middle that is adapted to the third step 53.

[0032] In one embodiment, such as Figure 1 and Figure 2 As shown, the valve body 70 has a step 4 71 on the inner side of its top end, and the valve head 50 has a step 54 on the outer side of its bottom end that is adapted to the step 4 71. The side of the step 54 is provided with a groove 1 55, and an O-ring 2 41 is provided in the groove 1 55.

[0033] In one embodiment, such as Figure 1 and Figure 2 As shown, the valve body 70 has a groove 72 on the outer side of its top end, and a retaining ring 32 and an O-ring 42 are arranged sequentially from top to bottom in the groove 72.

[0034] The sealing rings with multiple seals (O-ring 1 40, O-ring 2 41, and O-ring 3 42) can fill the sealing gap by their own elastic deformation, which can effectively prevent fluid leakage. Whether it is a dynamic seal (such as at valve stem 10) or a static seal (such as at valve body 70 connection), they can play a good role and ensure the valve's sealing performance under different operating conditions.

[0035] Gasket 30, washer 31, and retaining ring 32 work together to further enhance the sealing effect, distribute pressure, and reduce the risk of media leakage.

[0036] By using gasket 31 to distribute pressure, wear caused by friction, vibration, and localized stress concentration between components can be reduced, thus extending the overall service life of the valve.

[0037] In one embodiment, such as Figure 1 , Figure 4 and Figure 7 As shown, the inner side of the threaded sleeve 60 is a regular hexagon, and the outer shape of the top of the valve core 80 is adapted to the inner side of the threaded sleeve 60.

[0038] By adapting the inner hexagonal side of the threaded sleeve 60 to the outer hexagonal side of the valve core 80, when the valve body 70 is rotated, the valve core 80 cannot rotate due to the limitation of the two hexagonal sides of the threaded sleeve 60. Instead, it slides along the inner hexagonal side of the threaded sleeve 60 and rises or falls according to the rotation direction of the valve body 70, thereby adjusting the valve opening.

[0039] In one embodiment, such as Figure 1 , Figure 2 and Figure 4 As shown, the valve body 70 extends inward from the inner side of its bottom end to form a valve port, and the outer diameter of the valve core 80 gradually decreases from top to bottom to form an inclined surface. When the valve core 80 descends, the inclined surface cooperates with the valve port to form a seal.

[0040] The valve core 80 achieves a seal when it descends to contact the top edge of the valve port with the inclined surface. As it rises, different distances between the inclined surface and the top edge of the valve port create different valve openings. A through-hole can be opened on the side wall above the valve port at the bottom of the valve body 70 to allow media to flow between the inner and outer sides of the valve body 70. To maintain a seal, the bottom of the valve core 80 is a closed surface, and a cavity is opened at the top for threaded connection with the valve stem 10. To prevent pressure on the cavity from preventing the valve stem 10 from entering when the valve core 80 is connected to the valve stem 10, a pressure relief hole can be opened at the bottom position of the valve core 80 corresponding to the cavity side wall.

[0041] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A threaded cartridge manual shut-off valve, comprising a valve body, a valve stem, and a valve core, characterized in that, A valve head is provided on the inner side of the top of the valve body. A nut is threadedly connected to the outer side of the top of the valve head. The bottom end of the valve stem extends through the nut and the valve head to the inner side of the top of the valve body. The inner side of the top of the valve core is threadedly connected to the outer side of the bottom end of the valve stem. A threaded sleeve is slidably connected to the outer side of the top of the valve core. The outer side of the top of the threaded sleeve is threadedly connected to the inner side of the bottom end of the valve head. The outer side of the bottom end of the threaded sleeve is threadedly connected to the inner side of the top of the valve body.

2. The threaded cartridge manual shut-off valve according to claim 1, characterized in that, The valve head has a step on the inner side of its top end. A gasket is provided between the top surface of the valve head and the bottom surface of the top end of the nut. The bottom inner side of the gasket extends downward to the step. An O-ring is provided between the bottom surface of the downwardly extended portion of the gasket and the top surface of the step.

3. The threaded cartridge manual shut-off valve according to claim 2, characterized in that, The valve head has a second step and a third step on the inner side of the bottom end from bottom to top. The outer side of the top end of the threaded sleeve is threaded to the side of the second step. A washer is provided between the top surface of the threaded sleeve and the top surface of the second step. The valve stem has a limiting part in the middle that is adapted to the third step.

4. The threaded cartridge manual shut-off valve according to claim 3, characterized in that, The valve body has a step four on the inner side of the top end, and the valve head has a step five on the outer side of the bottom end that matches the step four. The side of the step five is provided with a groove one, and an O-ring seal two is provided in the groove one.

5. The threaded cartridge manual shut-off valve according to claim 4, characterized in that, The valve body has a groove 2 on the outer side of the top end, and a retaining ring and an O-ring 3 are arranged in the groove 2 from top to bottom.

6. The threaded cartridge manual shut-off valve according to claim 5, characterized in that, The inner side of the threaded sleeve is hexagonal, and the outer shape of the top of the valve core is adapted to the inner side of the threaded sleeve.

7. The threaded cartridge manual shut-off valve according to claim 6, characterized in that, The valve body extends inward from the inner side of the bottom end to form a valve port, and the outer diameter of the valve core gradually decreases from top to bottom to form a slope. When the valve core descends, the slope cooperates with the valve port to form a seal.

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