A type of anti-jamming flow guide valve

Abstract

This invention relates to the field of valves, and more specifically to an anti-jamming flow guiding gate valve; it includes a valve body, the upper end of which drives a gate valve stem to slide up and down via a threaded connection, and the lower end of the valve body is connected to and communicates with a buffer base. Two combined sealing rings are symmetrically arranged inside the valve body. By using a handwheel to drive the gate valve stem to move downward, the gate valve stem seals by tightly fitting with the two combined sealing rings; the downward movement of the gate valve stem synchronously drives the combined sealing rings to rotate, preventing jamming at the seal. The beneficial effect of this invention is to solve the problems that cannot be solved in actual use due to long-term solidification inside the valve, resulting in difficulty in opening and closing the valve, jamming and damage to the sealing end face, and poor sealing.

Description

Technical Field

[0001] This invention relates to the field of valves, and more specifically to an anti-jamming flow guiding gate valve. Background Technology

[0002] Commonly used gate valves in the prior art are prone to jamming due to the long-term solidification of their internal components, which can lead to the deposition of impurities and cause difficulties in opening and closing, system failures, and poor sealing, especially in solid media. A gate valve with anti-jamming properties, similar to one described in patent number CN120537928A, includes a valve body, a gate, a sealing ring, and a valve stem. The valve body has a medium channel, and the valve stem drives the gate to move in a direction intersecting with the flow direction of the medium channel. The sealing ring is located on both sides of the gate and is coaxial with the valve body. A flow guiding mechanism is provided at the inlet of the medium channel. The flow guiding mechanism includes a flow guiding frame connected to the inner wall of the valve body and flow guiding blades distributed circumferentially along the flow guiding frame. An anti-deposition part is provided at the bottom of the medium channel, and the lower part of the anti-deposition part points to the slag discharge structure at the bottom of the valve body. A filter assembly is detachably connected and assembled at the slag discharge structure. This solution uses a flow guiding mechanism at the front end of the media channel. The guide vanes create a swirling flow of the media within the machine. This mechanism not only guides the media flow and reduces impact, but also prevents impurities from accumulating through the swirling flow. Combined with the inclined design of the anti-deposition plate, it can solve the problem of impurities accumulating at the bottom of the valve body in the media pipeline. However, in actual use, this valve cannot solve the problems of difficulty in opening and closing the valve, damage to the sealing end face, and poor sealing caused by long-term solidification inside the valve. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the problems in the prior art that cannot be solved in actual use due to long-term solidification inside the valve, resulting in difficulty in opening and closing the valve, damage to the sealing end face, and poor sealing.

[0004] Therefore, the technical solution adopted is an anti-jamming guide gate valve of the present invention, which includes a valve body. The upper end of the valve body drives the gate valve stem to slide up and down through a threaded connection. The lower end of the valve body is connected to and communicates with a buffer base. Two combined sealing rings are symmetrically arranged inside the valve body. By using a handwheel to drive the gate valve stem to move downward, the gate valve stem seals by tightly fitting with the two combined sealing rings. The downward-moving gate valve stem synchronously drives the combined sealing rings to rotate to prevent jamming at the seal.

[0005] Preferably, the lower end of the valve body is provided with a lower opening, and the valve body is connected to the buffer base located at the lower end of the valve body through the lower opening. The inner wall of the valve body is symmetrically provided with sealing ring slots for placing and fixing the combined sealing rings.

[0006] Preferably, the combined sealing ring includes a fixed sealing ring and a rotating sealing ring. The fixed sealing ring is fixed in the sealing ring groove of the valve body. The rotating sealing ring and the fixed sealing ring are mutually sealed and rotatably connected. The outer wall of the rotating sealing ring is fixed with a toothed ring. A sealing end face is provided at the sealing contact between the rotating sealing ring and the gate valve stem.

[0007] Preferably, the gate valve stem includes a screw shaft, a screw socket, and a gate seat. The screw shaft is threadedly connected to the upper end of the valve body via a handwheel drive. The lower end of the screw shaft is fixed with a screw socket, which is inserted into the upper end of the gate seat. The outer walls at both ends of the gate seat are provided with impurity removal outer rings, which include an outer ring and an inner ring. The outer ring and the inner ring are fixed to the sealing side of the gate seat for impurity removal and pre-sealing before sealing. A pressure turntable is fixed at the lower end of the gate seat, and a sealing mirror is provided between the outer ring and the inner ring.

[0008] Preferably, during the downward displacement process of the screw shaft and screw socket, the gate seat is added between the two combined sealing rings, and both the outer ring and the inner ring pass through the sealing end face of the combined sealing ring in advance, and the sealing mirror surface is symmetrically set with the sealing end face; The sealing mirror is fixed to the outer wall of the inner screw cylinder dispersion top seat. The inner screw cylinder dispersion top seat slides in the inner seat slot of the gate seat. The center of the inner screw cylinder dispersion top seat is connected to the central gear shaft through the threaded engagement of the threaded cylinder. The central gear shaft is rotatably set on the inner wall of the gate seat.

[0009] Preferably, a central gear is fixed at the center of the central gear shaft, and one side of the central gear meshes with the lower pressure gear seat. The lower pressure gear seat slides longitudinally on the upper side of the inner wall of the gate seat. The upper end of the lower pressure gear seat is attached to the screw socket. The lower pressure gear seat is inserted into the spring shaft. The spring of the spring shaft is set between the lower pressure gear seat and the spring top seat. The spring top seat is fixed to the inner wall of the gate seat.

[0010] Preferably, the buffer base includes a lower frame and a central frame. The lower frame is fixed to the outer wall of the valve body, and the central frame is fixed inside the lower frame. The central frame is connected to the inside of the valve body through a lower opening. The downwardly displaced gate seat drives the downward pressing turntable to press the lower top sliding slope seat downward through the lower opening. Multiple rotating wheels are rotatably arranged inside the downward pressing turntable. The lower top sliding slope seat slides on the extension rod of the central frame through pulley limit. A plug discharge port is provided on the side end of the central frame.

[0011] Preferably, the lower sliding ramp seat is fixed inside the rack platform, and both ends of the rack platform are limited and slidable within the lower frame seat and the center frame by the extension shaft. A spring shaft top platform is fixed on the extension shaft, and the spring shaft top platform is reset by the squeezing force of the limiting reset spring inside the lower frame seat.

[0012] Preferably, the upper end of the rack platform is symmetrically provided with racks, and the two racks respectively mesh with the gear rings on the two combined sealing rings.

[0013] Preferably, the elastic properties of the limit reset spring are less than those of the spring sleeved on the spring shaft inside the gate seat.

[0014] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in this application.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the internal structure of the conventional gate valve used in this invention, as well as a structural schematic diagram of the lower opening position; Figure 3 This is a cross-sectional structural diagram of the entire invention; Figure 4 This is a schematic diagram of the internal connection structure of the valve body of the present invention; Figure 5 This is a schematic diagram of the combined sealing ring of the present invention; Figure 6 This is a schematic diagram of the gate valve stem of the present invention; Figure 7 This is a schematic diagram of the gate seat structure of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the gate seat structure of the present invention. Figure 2 ; Figure 9 This is a schematic diagram of the gate seat structure of the present invention. Figure 3 ; Figure 10 This is a schematic diagram of the internal structure of the gate seat of the present invention. Figure 1 ; Figure 11 This is a schematic diagram of the internal structure of the gate seat of the present invention. Figure 2 ; Figure 12 This is a schematic diagram of the internal structure of the gate seat of the present invention. Figure 3 ; Figure 13This is a schematic diagram of the structure of the buffer base of the present invention. Figure 1 ; Figure 14 This is a cross-sectional structural diagram of the interior of the buffer base of the present invention.

[0017] In the diagram: 1. Valve body; 2. Gate valve stem; 3. Buffer base; 4. Combined sealing ring; 5. Lower opening; 6. Fixed sealing ring; 7. Rotary sealing ring; 8. Sealing end face; 9. Gear ring; 10. Screw shaft; 11. Screw socket; 12. Gate seat; 13. Impurity removal outer ring; 14. Lower pressure turntable; 15. Sealing mirror; 16. Lower pressure gear seat; 17. Inner seat slot; 18. Inner screw cylinder dispersion top seat; 19. Central gear shaft; 20. Spring shaft; 21. Spring top seat; 22. Central gear; 23. Lower frame seat; 24. Liquid inlet; 25. Central frame; 26. Lower top sliding slope seat; 27. Rack platform; 28. Limiting and resetting spring; 29. ​​Spring shaft top platform. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In the description of this application, it should be understood that the terms "middle," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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 of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] Example 1: As Figure 1 and Figure 2 As shown, an anti-jamming flow guiding gate valve includes a valve body 1. The upper end of the valve body 1 drives the gate valve stem 2 to slide up and down through a threaded connection. The lower end of the valve body 1 is connected to and communicates with a buffer base 3. Two combined sealing rings 4 are symmetrically arranged inside the valve body 1. By using a handwheel to drive the gate valve stem 2 to move downward, the gate valve stem 2 seals by tightly fitting with the two combined sealing rings 4. The downward movement of the gate valve stem 2 synchronously drives the combined sealing rings 4 to rotate to prevent jamming at the seal.

[0023] The working principle and beneficial effects of this embodiment are as follows: By installing the valve body 1 in a designated position and considering the usage environment, it is determined whether to use a conventional gate valve or this gate valve. If the medium transported in the pipeline is easily flowing and is liquid, a conventional gate valve is sufficient; if the transported medium contains solid media, this gate valve can be selected. By installing the valve body 1 in the designated pipeline position for sealing connection, the gate valve stem 2 is driven to move up and down in the valve body 1 by rotating the handwheel on the valve body 1, thereby achieving the opening and closing function. Two combined sealing rings 4 are symmetrically arranged inside the valve body 1. The downwardly moving gate valve stem 2 is clamped and driven by the tight fit between the two combined sealing rings 4 to achieve sealing pressure and ensure sealing effect. The downwardly moving gate valve stem 2 is connected to and connected to a buffer base 3 at the lower end of the valve body 1 to synchronously drive the combined sealing rings 4 to rotate, preventing jamming at the seal. The rotating combined sealing rings 4 effectively prevent the seal from solidifying while achieving sealing, thereby alleviating the situation of jamming due to long-term solidification of the seal. This solves the problem of valves being difficult to open and close, stuck or damaged sealing surfaces, and poor sealing caused by long-term solidification inside the valve, which cannot be resolved in actual use.

[0024] Example 2: Figure 1 — Figure 14 As shown, an anti-jamming flow guiding gate valve is provided with a lower opening 5 at the lower end of the valve body 1. The valve body 1 is connected to the buffer base 3 located at the lower end of the valve body 1 through the lower opening 5. The inner wall of the valve body 1 is symmetrically provided with sealing ring grooves for placing and fixing the combined sealing ring 4.

[0025] The working principle and beneficial effects of this embodiment are as follows: By providing a lower opening 5 at the lower end of the valve body 1, the valve body 1 is connected to the buffer base 3 located at the lower end of the valve body 1 through the lower opening 5, so that the combined sealing ring 4 symmetrically arranged on the inner wall of the valve body 1 can mesh with the rack of the rack platform 27, which facilitates rotation. The sealing ring slots symmetrically arranged on the inner wall of the valve body 1 facilitate the fixing of the fixed sealing ring 6 of the combined sealing ring 4.

[0026] Example 3: As Figure 1 — Figure 14 As shown, an anti-jamming flow guiding gate valve is provided. The combined sealing ring 4 includes a fixed sealing ring 6 and a rotating sealing ring 7. The fixed sealing ring 6 is fixed in the sealing ring groove of the valve body 1. The rotating sealing ring 7 and the fixed sealing ring 6 are mutually sealed and rotatably connected. A toothed ring 9 is fixed on the outer wall of the rotating sealing ring 7. A sealing end face 8 is provided at the sealing contact between the rotating sealing ring 7 and the gate valve stem 2.

[0027] The working principle and beneficial effects of this embodiment are as follows: The combined sealing ring 4 is composed of a fixed sealing ring 6 and a rotating sealing ring 7. The fixed sealing ring 6 is fixed in the sealing ring groove of the valve body 1 to achieve a sealing and fixing effect. The rotating sealing ring 7 and the fixed sealing ring 6 are mutually sealed and rotated, so that the rotating sealing ring 7 can perform a quantitative rotation while sealing on the fixed sealing ring 6, preventing the situation of jamming and corrosion caused by excessive accumulation. A toothed ring 9 is fixed on the outer wall of the rotating sealing ring 7 for meshing with the rack of the rack platform 27, so that it can move immediately when opening and closing the valve. A sealing end face 8 is provided at the sealing contact between the rotating sealing ring 7 and the gate valve stem 2, so that they can fit tightly to achieve a seal and achieve the valve blocking effect.

[0028] Example 4: Figure 1 — Figure 14 As shown, an anti-jamming flow guiding gate valve is provided. The gate valve stem 2 includes a screw shaft 10, a screw socket 11, and a gate seat 12. The screw shaft 10 is connected to the upper end of the valve body 1 by a handwheel drive threaded connection. The lower end of the screw shaft 10 is fixed with the screw socket 11, and the screw socket 11 is inserted into the upper end of the gate seat 12. The outer walls at both ends of the gate seat 12 are provided with impurity removal outer rings 13. The impurity removal outer rings 13 include an outer ring and an inner ring. The outer ring and the inner ring are fixed to the sealing side of the gate seat 12 for impurity removal and pre-sealing before sealing. The lower end of the gate seat 12 is fixed with a pressure turntable 14. A sealing mirror surface 15 is provided between the outer ring and the inner ring.

[0029] The working principle and beneficial effects of this embodiment are as follows: The screw shaft 10 is threadedly connected to the upper end of the valve body 1 via a handwheel. By rotating the handwheel on the valve body 1, the screw shaft 10 is driven to rotate within the valve body 1 via the threaded connection. A screw socket 11 is fixed to the lower end of the screw shaft 10, and the screw socket 11 is inserted into the upper end of the gate seat 12. Thus, the vertically displaced screw shaft 10 drives the gate seat 12 to open and close within the valve body 1 via the screw socket 11, thereby achieving the function of opening and closing the valve. By providing impurity removal outer rings 13 on the outer walls at both ends of the gate seat 12, the impurity removal outer rings 13 include an outer ring and an inner ring. During the up and down process, the outer ring and the inner ring are fixed to the sealing end face of the gate seat 12. This is used for impurity removal and pre-sealing before sealing. During the up and down displacement process, the sealing end face 8 is pushed and filtered, preventing solidified media from remaining on the surface of the sealing end face 8. By using it for impurity removal and pre-sealing before sealing, it effectively prevents solidified impurities from getting stuck between the sealing end faces 8. By fixing a pressure turntable 14 at the lower end of the gate seat 12, it is easy to push the buffer base 3 at the lower end to synchronously drive the rotating sealing ring 7 of the combined sealing ring 4. A sealing mirror 15 is provided between the outer ring and the inner ring. Through the pushing and filtering of the outer ring and the inner ring, the sealing mirror 15 can be made to correspond to the sealing end face 8, so as to achieve effective mirror bonding or rubber compression sealing.

[0030] Example 5: Figure 1 — Figure 14 As shown, in an anti-jamming flow guiding gate valve, the screw shaft 10 and screw socket 11 add the gate seat 12 between two combined sealing rings 4 during the downward displacement process. The outer ring and the inner ring both pass through the sealing end face 8 of the combined sealing ring 4 in advance, and the sealing mirror surface 15 is symmetrically arranged with the sealing end face 8. The sealing mirror 15 is fixed to the outer wall of the inner screw cylinder dispersion top seat 18. The inner screw cylinder dispersion top seat 18 is correspondingly limited and slidably in the inner seat slot 17 of the gate seat 12. The center of the inner screw cylinder dispersion top seat 18 is connected to the central gear shaft 19 through the threaded engagement of the threaded cylinder. The central gear shaft 19 is rotatably disposed on the inner wall of the gate seat 12.

[0031] The working principle and beneficial effects of this embodiment are as follows: During the downward displacement of the screw shaft 10 and screw socket 11, by adding the gate seat 12 between the two combined sealing rings 4, both the outer ring and the inner ring are pre-filtered and impurities are removed by passing through the sealing end face 8 of the combined sealing ring 4, thereby making the sealing mirror 15 symmetrically arranged with the sealing end face 8, which facilitates the push and squeeze to achieve effective gate sealing. By fixing the sealing mirror 15 to the outer wall of the inner screw cylinder dispersion top seat 18, and combining the inner screw cylinder dispersion top seat 18 with the corresponding limiting sliding in the inner seat slot 17 of the gate seat 12, stable inward and outward sliding is facilitated, thereby facilitating the sealing mirror 15 and the sealing end face 8 at the sealing point to compress and seal, improving the sealing effect and preventing leakage; the center of the inner screw cylinder dispersion top seat 18 is connected to the central gear shaft 19 through a threaded cylinder, so that when the central gear shaft 19 rotates, the inner screw cylinder dispersion top seat 18 can rotate, and with the restraint it is subjected to, the effect of pressure sealing or pressure opening is achieved by pushing inward and outward; by rotating the central gear shaft 19 on the inner wall of the gate seat 12, it is convenient to rotate under the drive of the downward pressure gear seat 16.

[0032] Example 6: As Figure 1 — Figure 14 As shown, an anti-jamming flow guide gate valve is provided. A central gear 22 is fixed at the center of the central gear shaft 19. One side of the central gear 22 meshes with and drives the lower pressure gear seat 16. The lower pressure gear seat 16 slides longitudinally on the upper side of the inner wall of the gate seat 12. The upper end of the lower pressure gear seat 16 is attached to the screw socket 11. The lower pressure gear seat 16 is inserted into the spring shaft 20. The spring of the spring shaft 20 is arranged between the lower pressure gear seat 16 and the spring top seat 21. The spring top seat 21 is fixed to the inner wall of the gate seat 12.

[0033] The working principle and beneficial effects of this embodiment are as follows: A central gear 22 is fixed at the center of the central gear shaft 19. One side of the central gear 22 meshes with the lower pressure gear seat 16, which facilitates synchronous meshing transmission with the up and down displacement of the lower pressure gear seat 16. The lower pressure gear seat 16 slides longitudinally on the upper side of the inner wall of the gate seat 12, which facilitates longitudinal displacement. Because the upper end of the lower pressure gear seat 16 is attached to the screw socket 11, and the elastic performance of the limit return spring 28 is less than that of the spring sleeved on the spring shaft 20 inside the gate seat 12, during the pressing process of the lower pressure gear seat 16, the two limit return springs in the buffer base 3 are used to achieve the desired effect. After the spring 28 is pressed down, the spring inserted into the spring shaft 20 of the pressing tooth seat 16 is squeezed. The spring is set between the pressing tooth seat 16 and the spring top seat 21 through the spring shaft 20. Then the pressing tooth seat 16 moves downward, driving the central gear shaft 19 and the central gear 22 fixed in the center to rotate. This drives the two symmetrical inner screw cylinder dispersion top seats 18 to press the sealing mirror surface 15 outward to fit against the sealing end face 8 for tight pressure sealing. Correspondingly, the pressing tooth seat 16 moves upward in the opposite direction. Under the upward action of the screw shaft 10 and the screw socket 11, the spring returns to its original position, disengages from the pressure seal, and after surface filtration, everything returns to its original position.

[0034] Example 7: Figure 1 — Figure 14As shown, an anti-jamming flow guiding gate valve is described. The buffer base 3 includes a lower frame seat 23 and a central frame 25. The lower frame seat 23 is fixed to the outer wall of the valve body 1, and the central frame 25 is fixed inside the lower frame seat 23. The central frame 25 is connected to the interior of the valve body 1 through a lower opening 5. The downwardly displaced gate seat 12 drives the downward pressing turntable 14 to press the lower top sliding slope seat 26 downward through the lower opening 5. Multiple rotating wheels are rotatably arranged inside the downward pressing turntable 14. The lower top sliding slope seat 26 slides on the extension rod of the central frame 25 through the pulley limit. A plug discharge port is provided on the side end of the central frame 25.

[0035] The working principle and beneficial effects of this embodiment are as follows: The lower frame seat 23 is fixed to the outer wall of the valve body 1, and the central frame 25 is fixed inside the lower frame seat 23. The central frame 25 is connected to the inside of the valve body 1 through the lower opening 5, which plays a role in sealing and supporting. The downward displacement of the gate seat 12 drives the downward pressing turntable 14 to press the lower top sliding slope seat 26 downward through the lower opening 5. By setting the slope to rotate, the lateral pressure is pushed so that the lower top sliding slope seat 26 slides on the extension rod of the central frame 25 through the pulley limit, pushing the rack table 27 to slide laterally inside the central frame 25. The spring shaft top table 29 compresses the limit and reset spring 28, thereby achieving the buffer limit function while facilitating reset. At the same time, it is convenient to match the gear ring 9 on the rotating sealing ring 7, and convenient to rotate the combined sealing ring 4 that has accumulated for a long time, preventing jamming and affecting the seal. The liquid filling port 24 is set to facilitate the addition of penetrant to the internal sealing ring, and it is convenient to cooperate with the internal loosening adjustment to effectively prevent jamming.

[0036] Example 8: As Figure 1 — Figure 14 As shown, in an anti-jamming flow guide valve, the lower sliding slope seat 26 is fixed inside the rack platform 27. Both ends of the rack platform 27 are limited and slidable within the lower frame seat 23 and the central frame 25 by extension shafts. A spring shaft top platform 29 is fixed on the extension shaft. The spring shaft top platform 29 is reset by the squeezing force of the limiting reset spring 28 inside the lower frame seat 23.

[0037] The working principle and beneficial effects of this embodiment are as follows: The lower sliding ramp 26 is fixed inside the rack platform 27. When the lower rotating platform 14 presses down on the lower sliding ramp 26, both ends of the rack platform 27 are limited and slid within the lower frame 23 and the center frame 25 by the extension shaft. Simultaneously, a spring shaft top platform 29 is fixed on the extension shaft. The spring shaft top platform 29 is reset by the compression force of the limiting and resetting spring 28 inside the lower frame 23, and also serves as a blocking and limiting mechanism to prevent excessive travel of the lower sliding ramp 26. It also resets when the valve is opened, facilitating continued use next time. Furthermore, the lower sliding ramp... During the reset process of seat 26, the lower sliding slope seat 26 gradually closes and blocks the lower opening 5. In actual valve applications, some solid media may enter the center frame 25 through the closed blockage, causing some accumulation in the center frame 25. Combined with the actual installation and use position of the limit reset spring 28, it cannot affect this. To avoid excessive accumulation of impurities during long-term use, a drain port needs to be provided on the side of the center frame 25. The drain port can be sealed by a sealing end seat with a sealing thread. When it is necessary to drain impurities, it can be opened to discharge the accumulated impurities.

[0038] Example 9: As Figure 1 — Figure 14 As shown, an anti-jamming flow guiding gate valve is provided, wherein racks are symmetrically arranged on the upper end of the rack platform 27, and the two racks respectively mesh with the gear rings 9 on the two combined sealing rings 4.

[0039] The working principle and beneficial effects of this embodiment are as follows: During the process of adjusting the gate valve stem 2 up and down, the two racks are engaged and driven by the combined transmission to drive the gear rings 9 on the two combined sealing rings 4 respectively, thereby allowing the combined sealing rings 4 to rotate separately, preventing solid media from entering and causing blockage. At the same time, the pressurized core seal at the sealing end face 8 can better fit, preventing unnecessary blockage and jamming due to long-term accumulation. Meanwhile, the rack platform 27 and the gear ring 9 are provided with isolation plates on both sides of the meshing point and fixed at the lower opening 5 to prevent solid media from being added to the meshing point and affecting the meshing transmission.

[0040] Example 10: As Figure 1 — Figure 14 As shown, in an anti-jamming flow guiding gate valve, the elastic performance of the limit reset spring 28 is less than that of the spring sleeved on the spring shaft 20 inside the gate seat 12.

[0041] The working principle and beneficial effects of this embodiment are as follows: During installation, the elastic performance of the limit reset spring 28 is made smaller than that of the spring sleeved on the spring shaft 20 inside the gate seat 12. Therefore, it is given priority to rotate the sealing ring 7 first during the downward process, and then pressurize the sealing mirror 15 at the sealing point. This ensures the use of the sealing pressurization procedure, determines the steps for perfect sealing, and thus achieves effective sealing.

[0042] The above description is not intended to limit the present invention, nor is the present invention limited to the examples given above. Any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. A stick prevention flow control gate valve, characterized by: The valve body (1) is included. The upper end of the valve body (1) drives the gate valve stem (2) to slide up and down through a threaded connection. The lower end of the valve body (1) is connected to and connected to a buffer base (3). Two combined sealing rings (4) are symmetrically arranged inside the valve body (1). The gate valve stem (2) is driven to move downward by using a handwheel. The gate valve stem (2) seals by tightly fitting with the two combined sealing rings (4). The downwardly moving gate valve stem (2) synchronously drives the combined sealing rings (4) to rotate to prevent jamming at the seal.

2. The anti-jamming flow guiding gate valve according to claim 1, characterized in that: The lower end of the valve body (1) is provided with a lower opening (5), and the valve body (1) is connected to the buffer base (3) located at the lower end of the valve body (1) through the lower opening (5). The inner wall of the valve body (1) is symmetrically provided with sealing ring slots for placing and fixing the combined sealing ring (4).

3. The anti-jamming flow guiding gate valve according to claim 1, characterized in that: The combined sealing ring (4) includes a fixed sealing ring (6) and a rotating sealing ring (7). The fixed sealing ring (6) is fixed in the sealing ring groove of the valve body (1). The rotating sealing ring (7) and the fixed sealing ring (6) are mutually sealed and rotatably connected. The outer wall of the rotating sealing ring (7) is fixed with a toothed ring (9). A sealing end face (8) is provided at the sealing contact between the rotating sealing ring (7) and the gate valve stem (2).

4. The anti-jamming flow guiding gate valve according to claim 3, characterized in that: The gate valve stem (2) includes a screw shaft (10), a screw socket (11), and a gate seat (12). The screw shaft (10) is connected to the upper end of the valve body (1) by a handwheel drive threaded connection. The lower end of the screw shaft (10) is fixed with a screw socket (11), and the screw socket (11) is inserted into the upper end of the gate seat (12). The outer walls at both ends of the gate seat (12) are provided with impurity removal outer rings (13). The impurity removal outer rings (13) include an outer ring and an inner ring. The outer ring and the inner ring are fixed on the sealing side of the gate seat (12) for impurity removal and pre-sealing before sealing. The lower end of the gate seat (12) is fixed with a pressure turntable (14). A sealing mirror (15) is provided between the outer ring and the inner ring.

5. The anti-jamming flow guiding gate valve according to claim 4, characterized in that: During the downward displacement process, the screw shaft (10) and screw socket (11) add the gate seat (12) between the two combined sealing rings (4). The outer ring and the inner ring both pass through the sealing end face (8) of the combined sealing ring (4) in advance. The sealing mirror (15) is symmetrically arranged with the sealing end face (8). The sealing mirror (15) is fixed on the outer wall of the inner screw cylinder dispersion top seat (18). The inner screw cylinder dispersion top seat (18) is correspondingly limited and slid in the inner seat slot (17) of the gate seat (12). The center of the inner screw cylinder dispersion top seat (18) is connected to the central gear shaft (19) through the threaded engagement of the screw cylinder. The central gear shaft (19) is rotatably set on the inner wall of the gate seat (12).

6. The anti-jamming flow guiding gate valve according to claim 5, characterized in that: The center gear (22) is fixed at the center of the central gear shaft (19). One side of the central gear (22) meshes with the lower pressure gear seat (16). The lower pressure gear seat (16) slides longitudinally on the upper side of the inner wall of the gate seat (12). The upper end of the lower pressure gear seat (16) is attached to the screw socket (11). The lower pressure gear seat (16) is inserted into the spring shaft (20). The spring of the spring shaft (20) is set between the lower pressure gear seat (16) and the spring top seat (21). The spring top seat (21) is fixed to the inner wall of the gate seat (12).

7. The anti-jamming flow guiding gate valve according to claim 4, characterized in that: The buffer base (3) includes a lower frame (23) and a center frame (25). The lower frame (23) is fixed to the outer wall of the valve body (1). The center frame (25) is fixed inside the lower frame (23). The center frame (25) is connected to the inside of the valve body (1) through the lower opening (5). The downward displacement of the gate seat (12) drives the downward pressing turntable (14) to press the lower top sliding slope seat (26) downward through the lower opening (5). Multiple rotating wheels are rotatably arranged inside the downward pressing turntable (14). The lower top sliding slope seat (26) slides on the extension rod of the center frame (25) through the pulley limit. A plug discharge port is provided on the side end of the center frame (25).

8. The anti-jamming flow guiding gate valve according to claim 7, characterized in that: The lower sliding ramp seat (26) is fixed inside the rack platform (27). Both ends of the rack platform (27) are limited and slidable in the lower frame seat (23) and the center frame (25) by the extension shaft. A spring shaft top platform (29) is fixed on the extension shaft. The spring shaft top platform (29) is reset by the squeezing force of the limiting reset spring (28) in the lower frame seat (23).

9. The anti-jamming flow guiding gate valve according to claim 8, characterized in that: The upper end of the rack platform (27) is symmetrically provided with racks, and the two racks respectively mesh with the gear rings (9) on the two combined sealing rings (4).

10. A flow-guiding gate valve for preventing jamming according to claim 8, characterized in that: The elastic properties of the limit reset spring (28) are less than those of the spring sleeved on the spring shaft (20) inside the gate seat (12).

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