Anti-scouring stop valve

Abstract

The utility model discloses an anti-scouring stop valve, belongs to the technical field of stop valves, and solves the problems that if some solid particles are carried in the stop valve, fluid carries the solid particles to scour a valve element of the stop valve, and then the surface of the valve element is abraded. And finally, the sealing performance is influenced when the valve core is sealed. The valve seat is communicated with the valve body, the valve rod penetrates through the valve seat into the valve body, the valve element is fixedly connected to the lower end of the valve rod in a one-stage mode and located in the valve body, the top face and the bottom face of the valve element are provided with an upper guide face and a lower guide face respectively, two grooves are formed in the inner circumferential wall of the position, communicated with the valve seat, of the valve body, and shielding blocks are connected into the grooves in a sliding mode. The valve rod is rotated, the valve rod dives, the valve element rotates and dives along with the valve rod, the shielding block is stressed through friction force, the spring is compressed to collapse into the groove, after the valve element ascends, the spring releases energy, the shielding block shields the valve element, and the valve element is protected against fluid scouring.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to an anti-scouring stop valve. Background Art

[0002] The stop valve is a common valve used to control the flow of fluid in a pipeline and can completely cut off the passage of the fluid. It plays an important role in the pipeline system and is usually used in situations where it is necessary to stop or adjust the flow in the pipeline. The main components of the stop valve include the valve body, valve cover, valve stem, valve core and sealing surface. Its working principle is to open or close the fluid passage by rotating the valve core or lifting the valve core. When the valve core is fully in contact with the valve seat, the passage of the fluid can be effectively cut off to achieve the closure of the valve.

[0003] When the flow channel in the stop valve is kept unobstructed on a daily basis, the fluid flows at a high speed in the flow channel and flushes the surface of the valve core. If the fluid is relatively clean, the impact on the valve core is not significant. However, if there are some solid particles in it, the fluid will carry the solid particles to flush the valve core of the stop valve, causing the surface of the valve core to be worn, which will eventually affect the sealing performance of the valve core.

[0004] Therefore, an anti-scour stop valve is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes an anti-scouring stop valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The closure of the valve core is of the form of a valve seat, wherein the closure is located adjacent to the valve seat and the closure is located adjacent to the valve seat. The closure is located adjacent to the valve seat and the closure is located adjacent to the valve seat. The closure is located adjacent to the valve seat and the closure is located adjacent to the valve seat.

[0008] Preferably, a blocking column is fixedly connected at the center of the bottom surface of the valve core, and a semicircular through hole is opened on the flat portion, and the through holes on both sides are combined to form a circular hole for the blocking column to pass through.

[0009] Preferably, sealing rings are fixedly connected to the inner peripheral walls of the two through holes, and the sealing rings are used to fit with the outer peripheral wall of the shielding column.

[0010] Preferably, an upper connecting seat and a lower connecting seat are fixedly connected to the inner peripheral wall of the valve body, and the upper connecting seat and the lower connecting seat are provided with sealing inclined surfaces that fit with the lower guide surface.

[0011] Preferably, the valve body is provided with a through groove for the valve core to pass through, and a lower connecting tube coaxially arranged with the through groove is fixedly connected to the outer peripheral wall of the valve body, the inner peripheral wall of the lower connecting tube is provided with an internal thread 1, and the outer peripheral wall of the lower end of the valve seat is provided with an external thread 1, and the valve seat and the lower connecting tube are threadedly connected via an external thread 1 and an internal thread 1, the outer peripheral wall of the valve stem is provided with an external thread 2, and the inner peripheral wall of the valve seat is provided with an internal thread 2, and the valve stem and the valve seat are threadedly connected via an external thread 2 and an internal thread 2.

[0012] Preferably, a valve cover is detachably connected to the upper end of the valve seat, and a through groove for the valve stem to pass through is formed on the valve cover.

[0013] Preferably, the inner peripheral wall of the valve cover is provided with an internal thread three, the outer side of the upper end of the valve seat is provided with an external thread three, and the valve cover is detachably connected to the valve seat via the internal thread three and the external thread three.

[0014] Preferably, the upper end of the valve stem is fixedly connected with a turning handle.

[0015] The utility model has the following beneficial effects:

[0016] The utility model rotates the valve stem, the valve stem dives, the valve core rotates and dives accordingly, friction is used to apply force to the blocking block, and the spring is compressed to shrink it into the groove. After the valve core rises, the spring releases energy, the blocking block shields the valve core, and the valve core is protected from being eroded by the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0019] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0020] 1. Valve body; 2. Upper connecting seat; 3. Lower connecting seat; 4. Sealing slope; 5. Lower connecting tube; 6. Valve seat; 7. Upper connecting tube; 8. Valve cover; 9. Valve stem; 10. Turning handle; 11. Valve core; 12. Upper guide surface; 13. Lower guide surface; 14. Groove; 15. Spring; 16. Blocking block; 17. Upper guide slope; 18. Lower guide slope; 19. Flat part; 20. Sealing ring; 21. Blocking column. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] An anti-scour stop valve, such as Figure 1 As shown, it includes a valve body 1, a valve seat 6 connected to the valve body 1, a valve stem 9 penetrating the valve seat 6 into the valve body 1, a valve core 11 fixedly connected to the lower end of the valve stem 9 and located in the valve body 1, and a turning handle 10 fixedly connected to the upper end of the valve stem 9.

[0023] like Figure 3 As shown, a blocking column 21 is fixedly connected at the center of the bottom surface of the valve core 11, and an upper guide surface 12 and a lower guide surface 13 are respectively provided on the top and bottom surfaces of the valve core 11. Two grooves 14 are provided on the inner circumferential wall of the valve body 1 at the connection with the valve seat 6, and a blocking block 16 is slidably connected in the groove 14. A spring 15 fixedly connected to the slider portion of the blocking block 16 is fixedly connected in the groove 14. The cross-section of the blocking block 16 is semicircular, and the blocking block 16 includes a slider portion, a guide portion fixedly connected to its inner ring, and a flat portion 19 fixedly connected to the inner ring of the guide portion and capable of fitting with the bottom surface of the valve core 11.

[0024] The slider portion is an annular plate-like structure with a thickness equal to the width of the groove 14, and the shielding block 16 is also an annular plate-like structure, and its thickness gradually decreases from the outer circle to the inner circle, so that the top and bottom surfaces of the guide portion form an upper guide inclined surface 17 and a lower guide inclined surface 18 respectively parallel to the upper guide surface 12 and the lower guide surface 13, and the thickness of the flat portion 19 is the minimum thickness of the guide portion, which is also an annular plate-like structure, and the flat portion 19 is provided with a semicircular through hole, and the through holes on both sides are combined to form a circular hole for the shielding column 21 to pass through, and a sealing ring 20 is fixedly connected to the inner circumferential wall of the two through holes, and the sealing ring 20 is used to fit with the outer circumferential wall of the shielding column 21.

[0025] like Figure 1 and 2As shown, an upper connecting seat 2 and a lower connecting seat 3 are fixedly connected to the inner circumferential wall of the valve body 1, and a sealing inclined surface 4 that fits with the lower guide surface 13 is provided on the upper connecting seat 2 and the lower connecting seat 3. A through groove for the valve core 11 to pass through is provided on the valve body 1, and a lower connecting tube 5 coaxially arranged with the through groove is fixedly connected to the outer circumferential wall of the valve body 1. An internal thread is provided on the inner circumferential wall of the lower connecting tube 5, and an external thread is provided on the outer circumferential wall of the lower end of the valve seat 6. The valve seat 6 and the lower connecting tube 5 are connected by an external thread. The valve stem 9 is threadedly connected with the valve seat 6 through the external thread 2 and the internal thread 2. The upper end of the valve seat 6 is detachably connected with a valve cover 8, and the valve cover 8 is provided with a through groove for the valve stem 9 to pass through. The inner circumferential wall of the valve cover 8 is provided with an internal thread 3, and the outer side of the upper end of the valve seat 6 is provided with an external thread 3. The valve cover 8 is detachably connected to the valve seat 6 through the internal thread 3 and the external thread 3.

[0026] When the utility model is in use, the operator holds the turning handle 10 to drive the valve stem 9 to rotate. The valve stem 9 is guided by the external thread 2 and the internal thread 2, so that the valve stem 9 can also dive in the valve seat 6 during the rotation process. As a result, the valve core 11 fixedly connected to the lower end of the valve stem 9 can also dive and rotate together. When the valve core 11 rotates, the lower guide surface 13 of the bottom surface contacts with the upper guide inclined surface 17 on the shielding block 16. When the two are in contact, the friction force acts on the shielding block 16, so that the guide part is stressed. And it is transmitted to the spring 15 through the slider portion, the spring 15 is compressed, and the blocking block 16 is displaced in the groove depth direction of the groove 14, so that the flat portion 19 can contact the lower guide surface 13. Under the guidance of the lower guide surface 13, the blocking block 16 is continuously subjected to the force in the groove depth direction of the groove 14, and then the spring 15 is compressed until the blocking block 16 is immersed in the groove 14, and then the valve core 11 can dive smoothly. In the subsequent diving process, the outer peripheral wall of the valve stem 9 and the valve core 11 will block the blocking block 16 to prevent it from being completely closed. The valve core 11 is closed until the lower guide surface 13 of the valve core 11 can fit with the sealing inclined surfaces 4 on the upper connecting seat 2 and the lower connecting seat 3, thereby completing the blocking of the flow channel in the valve body 1. When the valve core 11 moves upward following the valve stem 9, the upper guide surface 12 of the valve core 11 contacts the lower guide inclined surface 18 of the blocking block 16. Since the action of the valve core 11 is a spiral action, it is decomposed into rising and rotating. When the upper guide surface 12 of the valve core 11 conflicts with the lower guide inclined surface 18 of the blocking block 16, friction will be generated, so that the blocking block 16 is in the groove 1. 4, the spring 15 is compressed again to collapse, so that the blocking block 16 no longer blocks the displacement of the valve core 11. When the inner circle of the flat part 19 of the blocking block 16 is no longer blocked by the outer peripheral wall of the valve core 11, the spring 15 can release its elastic potential energy, so that the sealing ring 20 of the inner circle of the flat part 19 squeezes the outer circle of the blocking column 21, thereby completing the shielding of the valve core 11 and preventing the valve core 11 from being continuously scour by the fluid when the valve core 11 completely opens the flow channel in the valve body 1. This can protect the valve core 11 to a certain extent and prevent it from being worn due to long-term scouring.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anti-scour stop valve, characterized in that: The invention comprises a valve body (1), a valve seat (6) connected to the valve body (1), a valve stem (9) penetrating the valve seat (6) into the valve body (1), and a valve core (11) fixedly connected to the lower end of the valve stem (9) and located in the valve body (1), wherein the top and bottom surfaces of the valve core (11) are respectively provided with an upper guide surface (12) and a lower guide surface (13), and the valve body (1) is provided with two grooves (14) on the inner peripheral wall at the connection point between the valve body (1) and the valve seat (6), and a blocking block (16) is slidably connected in the groove (14). The cross section of the blocking block (16) is semicircular, and the blocking block (16) includes a slider portion, a guide portion fixedly connected to its inner ring, and a flat portion (19) fixedly connected to the inner ring of the guide portion and capable of being fitted with the bottom surface of the valve core (11). The top and bottom surfaces of the guide portion form an upper guide inclined surface (17) and a lower guide inclined surface (18) which are parallel to the upper guide surface (12) and the lower guide surface (13), respectively. A spring (15) fixedly connected to the slider portion is fixedly connected in the groove (14).

2. The anti-scour stop valve according to claim 1, characterized in that: A blocking column (21) is fixedly connected at the center of the bottom surface of the valve core (11), and the flat portion (19) is provided with a semicircular through hole, and the through holes on both sides are combined to form a circular hole for the blocking column (21) to pass through.

3. The anti-scour stop valve according to claim 2, characterized in that: A sealing ring (20) is fixedly connected to the inner peripheral walls of the two perforations, and the sealing ring (20) is used to fit with the outer peripheral wall of the shielding column (21).

4. The anti-scour stop valve according to claim 1, characterized in that: An upper connecting seat (2) and a lower connecting seat (3) are fixedly connected to the inner peripheral wall of the valve body (1), and a sealing inclined surface (4) which is in contact with the lower guide surface (13) is formed on the upper connecting seat (2) and the lower connecting seat (3).

5. The anti-scour stop valve according to claim 4, characterized in that: The valve body (1) is provided with a through groove for the valve core (11) to pass through, and a lower connecting tube (5) coaxially arranged with the through groove is fixedly connected to the outer peripheral wall of the valve body (1), and the inner peripheral wall of the lower connecting tube (5) is provided with an internal thread 1, and the outer peripheral wall of the lower end of the valve seat (6) is provided with an external thread 1, and the valve seat (6) and the lower connecting tube (5) are threadedly connected via an external thread 1 and an internal thread 1, and the outer peripheral wall of the valve stem (9) is provided with an external thread 2, and the inner peripheral wall of the valve seat (6) is provided with an internal thread 2, and the valve stem (9) and the valve seat (6) are threadedly connected via an external thread 2 and an internal thread 2.

6. The anti-scour stop valve according to claim 5, characterized in that: The upper end of the valve seat (6) is detachably connected to a valve cover (8), and the valve cover (8) is provided with a through groove for the valve stem (9) to pass through.

7. The anti-scour stop valve according to claim 6, characterized in that: The inner peripheral wall of the valve cover (8) is provided with an internal thread three, and the outer side of the upper end of the valve seat (6) is provided with an external thread three. The valve cover (8) is detachably connected to the valve seat (6) via the internal thread three and the external thread three.

8. The anti-scour stop valve according to claim 1, characterized in that: The upper end of the valve stem (9) is fixedly connected to a turning handle (10).

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