Self-cleaning transmission structure with flow regulation and cut-off function

Abstract

The utility model discloses a kind of self-cleaning transmission structures with flow regulation and cut-off function, by the valve housing of circular sleeve structure, collocation transmission mechanism, sealing mechanism and flow guide mechanism, by valve stem drive upper alloy piece relative lower alloy piece rotation, make the coincidence area of first through hole and second through hole, first strip slot and second flow guide hole synchronous change, simultaneously sealing mechanism prevents leakage, to realize the accurate control of flow under high pressure environment, while guaranteeing flow regulation accuracy, realize reliable cut-off function;And with the aid of the double design of sealing mechanism and upper and lower alloy piece completely adhering forms multiple seals, effectively blocks medium leakage to improve valve sealing reliability;Utilize the impact water flow generated when medium flows through dynamic change channel to complete automatic cleaning, reduce the risk of blockage;Simultaneously through transmission mechanism let valve can be accurately regulated, reliably cut off, high-efficiency self-cleaning and stably run under high pressure working condition.

Description

Technical Field

[0001] This utility model relates to the field of oil water injection, specifically to a self-cleaning transmission structure with flow regulation and shut-off functions. Background Technology

[0002] In industrial fields such as oilfield water injection and high-pressure chemical fluid transportation, control valves are key devices for controlling media flow. Their flow regulation accuracy, anti-clogging effect, and operational stability directly affect the smoothness of the production process. However, traditional control valves still have some aspects that need improvement in practical applications:

[0003] In traditional control valves, the medium flow is prone to local stagnation or turbulence in the flow channel. Over long-term use, impurities may accumulate, increasing the risk of channel blockage. Furthermore, under high-pressure conditions, existing flow guiding structures lack sufficient continuity and stability in adjusting the channel cross-sectional area, especially in low-flow control scenarios, where accuracy is difficult to meet the requirements of some industrial production. The transmission mechanism in traditional control valves also suffers from poor operational stability. Due to inadequate support and positioning design between the transmission components and the housing, transmission misalignment or axial movement can easily occur under high-pressure media, resulting in less smooth regulation. This not only affects the accuracy and response efficiency of flow regulation but may also accelerate wear between components, impacting the overall service life of the valve.

[0004] Therefore, a structure is urgently needed to solve the above problems. Utility Model Content

[0005] The main objective of this invention is to provide a self-cleaning transmission structure with flow regulation and shut-off functions, so as to at least solve the problems in the prior art where traditional regulating valves, when applied to high-pressure environments, cannot accurately achieve small flow control, are prone to leakage and blockage, and the unstable operation of the transmission mechanism affects the accuracy of flow regulation.

[0006] To achieve the above objectives, this utility model provides a self-cleaning transmission structure with flow regulation and cutoff functions, comprising:

[0007] The valve body is a sleeve structure, one end of which is closed. A first guide hole and a second guide hole are provided on the side wall of the valve body. The first guide hole and the second guide hole are not on the same side.

[0008] A transmission mechanism is nested within the valve housing and located at the first end of the sleeve structure. The transmission mechanism includes a valve stem that can rotate under external force, and the first end of the valve stem is used to withstand external force. The first guide hole is connected to the second end of the sleeve structure.

[0009] A sealing mechanism is sleeved between the transmission mechanism and the inner wall of the valve body to prevent the medium inside the valve body from passing through the gap between the transmission mechanism and the valve body;

[0010] A flow guiding mechanism is nested inside the valve body; the flow guiding mechanism includes an upper alloy plate and a lower alloy plate, the upper alloy plate being fixedly connected to the bottom of the valve stem; a first horizontal through-groove is formed at the top of the upper alloy plate, and two first through holes are formed in the first through-groove, with the first through holes vertically penetrating the upper alloy plate;

[0011] The lower alloy sheet has a second groove at its bottom end, which does not communicate with the side wall of the lower alloy sheet; two second through holes are formed in the second groove, and the second through holes vertically penetrate the lower alloy sheet; the second groove is connected to the second end of the sleeve structure; the bottom surface of the upper alloy sheet is completely in contact with the top surface of the lower alloy sheet;

[0012] When the valve stem rotates under external force, the valve stem drives the upper alloy plate to rotate relative to the lower alloy plate. In the first state, the area of ​​the horizontal end face opening of the first strip groove that overlaps with the opening of the second guide hole is the largest, and the first through hole and the second through hole completely overlap.

[0013] In the second state, the first through hole and the second through hole do not overlap at all, and the opening of the horizontal end face of the first strip groove does not overlap at all with the opening of the second guide hole.

[0014] When the valve stem is rotated under force, the overlapping area of ​​the cross sections of the first through hole and the second through hole gradually decreases / increases, and the overlapping area of ​​the horizontal end face opening of the first strip groove and the opening of the second guide hole gradually decreases / increases; the channel where the cross sections of the first through hole and the second through hole overlap is a guide channel.

[0015] Optionally, the inner wall of the valve body is provided with a first step, the second end of the valve stem is a pressure head, and the transmission mechanism includes:

[0016] A clamping nut is disposed inside the valve body and located on the first step; the outer wall of the clamping nut is threadedly connected to the inner wall of the valve body; a first groove is formed at the first end of the clamping nut.

[0017] A thrust ball bearing is sleeved on the valve stem and located between the clamping nut and the pressure head;

[0018] An annular retaining ring is fitted into the second groove circumferentially opened on the valve stem;

[0019] A deep groove ball bearing is disposed in the first groove and sleeved on the valve stem, with the top surface of the deep groove ball bearing in contact with the bottom surface of the annular retaining ring;

[0020] The valve stem is rotatably nested within the clamping nut, and the first end of the valve stem is located outside the valve body.

[0021] Optionally, a third groove is formed at the second end of the clamping nut; the top end of the thrust ball bearing is engaged in the third groove.

[0022] Optionally, the pressure head sidewall is provided with a fourth and a fifth groove in the circumferential direction, the valve housing inner wall is provided with a second step, and the sealing mechanism includes:

[0023] A bushing is located on the second step and is fitted between the pressure head and the inner wall of the valve body; a sixth groove and a seventh groove are formed circumferentially on the outer wall of the bushing;

[0024] The first sealing ring is fitted inside the fourth groove and clamped between the inner wall of the bushing and the fourth groove;

[0025] The second sealing ring is fitted inside the fifth groove and clamped between the inner wall of the bushing and the fifth groove;

[0026] The third sealing ring is fitted inside the sixth groove and clamped between the outer wall of the bushing and the sixth groove;

[0027] The fourth sealing ring is fitted inside the seventh groove and clamped between the outer wall of the bushing and the seventh groove.

[0028] Optionally, a third groove is provided at the bottom of the pressure head, which horizontally penetrates the side wall of the pressure head;

[0029] The bottom opening of the third strip groove is opposite to the top opening of the first strip groove, and the area where the horizontal end face opening of the first strip groove coincides with the opening of the second guide hole is the largest.

[0030] Optionally, the upper alloy sheet and the lower alloy sheet are made of cold work die steel with a hardness of HRC 60.

[0031] Optionally, the valve stem has a square-shaped hole in the middle, and the central axis of the hole coincides with the axis of the valve stem. The hole is used to cooperate with a component of a corresponding shape on the external force mechanism, so that the valve stem rotates synchronously when the external force mechanism rotates.

[0032] Optionally, the cross-sections of the first through hole and the second through hole are elliptical.

[0033] Optionally, the bottom outer surface of the lower alloy sheet has an eighth groove, and a fifth sealing ring is fitted inside the eighth groove, with the fifth sealing ring clamped between the outer wall of the lower alloy sheet and the eighth groove.

[0034] This utility model presents a self-cleaning transmission structure with flow regulation and shut-off functions. Through a circular sleeve valve shell, coupled with a transmission mechanism, a sealing mechanism, and a flow guiding mechanism, the valve stem drives the upper alloy plate to rotate relative to the lower alloy plate. This causes the overlapping areas of the first and second through holes, and the first strip groove and the second flow guiding hole to change synchronously. Simultaneously, the sealing mechanism prevents leakage, thus achieving precise flow regulation under high pressure. It ensures both accurate flow regulation and reliable shut-off function. Furthermore, the double design of the sealing mechanism and the upper and lower alloy plates, which are fully fitted, forms multiple seals, effectively blocking media leakage and improving valve sealing reliability. Automatic cleaning is achieved using the impact water flow generated when the medium flows through the dynamically changing channel, reducing the risk of blockage. At the same time, the transmission mechanism enables the valve to accurately regulate, reliably shut off, efficiently self-clean, and stably operate under high pressure conditions. Attached Figure Description

[0035] 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:

[0036] Figure 1 This is a schematic diagram of a self-cleaning transmission structure with flow regulation and cut-off functions, which is an optional embodiment of the present utility model.

[0037] Figure 2 This is a bottom view of the lower alloy sheet provided according to an embodiment of the present utility model;

[0038] Figure 3 This is a top view schematic diagram of the upper alloy sheet provided according to an embodiment of the present utility model;

[0039] Figure 4 This is a schematic diagram showing the positions of the first through hole and the second through hole when they do not overlap at all, according to an embodiment of the present utility model.

[0040] The above figures include the following reference numerals:

[0041] 10. Valve body; 20. Transmission mechanism; 21. Valve stem; 22. Compression nut; 23. Thrust ball bearing; 24. Annular retaining ring; 25. Deep groove ball bearing; 30. Sealing mechanism; 31. Bushing; 32. First sealing ring; 33. Second sealing ring; 34. Third sealing ring; 35. Fourth sealing ring; 36. Fifth sealing ring; 40. Flow guiding mechanism; 41. Upper alloy plate; 42. Lower alloy plate; 43. First strip groove; 44. Second strip groove; 45. First through hole; 46. Second through hole; 47. Third strip groove; 50. Upper locating pin; 60. Lower locating pin; 70. First flow guiding hole; 80. Second flow guiding hole. Detailed Implementation

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] like Figures 1-4 As shown in the figure, the present invention provides a self-cleaning transmission structure with flow regulation and cut-off functions, comprising:

[0044] The valve housing 10 is a sleeve structure, one end of which is closed. A first guide hole 70 and a second guide hole 80 are provided on the side wall of the valve housing 10. The first guide hole 70 and the second guide hole 80 are not on the same side.

[0045] The transmission mechanism 20 is nested within the valve housing 10 and located at the first end of the sleeve structure. The transmission mechanism 20 includes a valve stem 21, which can rotate under external force. The first end of the valve stem 21 is used to withstand external force. The first guide hole 70 is connected to the second end of the sleeve structure.

[0046] A sealing mechanism 30 is sleeved between the transmission mechanism 20 and the inner wall of the valve housing 10 to prevent the medium inside the valve housing 10 from passing through the gap between the transmission mechanism 20 and the valve housing 10.

[0047] A flow guiding mechanism 40 is nested within the valve housing 10; the flow guiding mechanism 40 includes an upper alloy plate 41 and a lower alloy plate 42, the upper alloy plate 41 is fixedly connected to the bottom of the valve stem 21; a first horizontal through-groove 43 is formed at the top of the upper alloy plate 41, and two first through holes 45 are formed in the first through-groove 43, and the first through holes 45 vertically penetrate the upper alloy plate 41;

[0048] The lower alloy sheet 42 has a second strip groove 44 at its bottom end, which is not connected to the side wall of the lower alloy sheet 42. Two second through holes 46 are formed within the second strip groove 44, and the second through holes 46 vertically penetrate the lower alloy sheet 42. The second strip groove 44 is connected to the second end of the sleeve structure. The bottom surface of the upper alloy sheet 41 is completely in contact with the top surface of the lower alloy sheet 42.

[0049] When the valve stem 21 rotates under external force, the valve stem 21 drives the upper alloy plate 41 to rotate relative to the lower alloy plate 42. In the first state, the area of ​​the horizontal end face opening of the first strip groove 43 overlapping with the opening of the second guide hole 80 is the largest, and the first through hole 45 and the second through hole 46 completely overlap.

[0050] In the second state, the first through hole 45 and the second through hole 46 do not overlap at all, and the horizontal end face opening of the first strip groove 43 does not overlap at all with the opening of the second guide hole 80.

[0051] When the valve stem 21 is rotated under force, the overlapping area of ​​the cross sections of the first through hole 45 and the second through hole 46 gradually decreases / increases, and the overlapping area of ​​the horizontal end face opening of the first strip groove 43 and the opening of the second guide hole 80 gradually decreases / increases; the channel where the cross section of the first through hole 45 and the cross section of the second through hole 46 overlap is a guide channel.

[0052] Specifically, the valve body 10 is the basic load-bearing and medium guiding frame of the entire valve. It is a hollow sleeve structure with one end closed and the other end being an assembly opening. The side wall of the valve body 10 has a first guide hole 70 and a second guide hole 80. The second end of the sleeve structure is hollow. The connection between the first guide hole 70 and the second end of the sleeve structure is the only inlet for the medium to enter the valve. The second guide hole 80 corresponds to the horizontal end face opening of the first strip groove in the guide mechanism and is the outlet for the medium to finally exit the valve.

[0053] The transmission mechanism 20 is nested in the first end, i.e., the open end, of the sleeve structure of the valve body 10, and includes a rotatable valve stem 21. The first end of the valve stem 21 receives an external force, such as torque, and the second end is fixedly connected to the upper alloy plate 41 of the flow guiding mechanism 40. The valve stem 21 rotates under the action of an external rotational force, which in turn drives the upper alloy plate 41 to rotate circumferentially.

[0054] The sealing mechanism 30 is fitted between the valve stem 21 of the transmission mechanism 20 and the inner wall of the valve body 10. Under high pressure, since the medium is under high pressure after entering through the first guide hole 70, the sealing mechanism 30, through its tight fit with the outer wall of the valve stem 21 and the inner wall of the valve body 10, blocks the channel for the high-pressure medium to leak outward from the gap between the valve stem and the valve body 10. This not only avoids medium waste and safety hazards, but also provides a sealed pressure environment for the guide mechanism to accurately adjust the flow rate, ensuring the accuracy of flow rate adjustment.

[0055] The flow guiding mechanism 40 is nested inside the valve body 10 and consists of an upper alloy plate 41 and a lower alloy plate 42 that fit together. The second strip groove 44 at the bottom end of the lower alloy plate 42 in the flow guiding mechanism 40 is connected to the second end space of the sleeve structure and the first flow guiding hole 70. The second through hole 46 in the second strip groove 44 vertically penetrates the lower alloy plate 42. The first strip groove 43 at the top end of the upper alloy plate 41 corresponds to the second flow guiding hole 80 on the valve body 10. The first through hole 45 in the first strip groove 43 is vertically aligned with the second through hole 46 on the lower alloy plate 42, and the upper alloy plate 41 rotates synchronously with the valve stem 21. When the medium enters the second end space of the sleeve structure from the first guide hole 70, it first enters the second strip groove 44 of the lower alloy plate, and then enters the second through hole 46. If the two through holes have overlapping areas, the fluid medium enters the first through hole 45 of the upper alloy plate 41 through the overlapping area, then flows into the first strip groove 43, and finally exits from the overlapping opening of the first strip groove 43 and the second guide hole 80. When the valve stem 21 rotates, the overlapping areas of the first through hole 45 and the second through hole 46, and the overlapping areas of the first strip groove 43 and the second guide hole 80 change synchronously. In the first state, the flow rate is the largest when the overlapping area of ​​the first through hole 45 and the second through hole 46 is the largest. When the first through hole 45 and the second through hole 46 do not overlap at all, the medium flow path is blocked, that is, the valve is closed, which is the second state. The overlapping area is the channel through which the fluid medium can pass. When the overlapping area shrinks, the medium velocity increases significantly, forming a high-speed water flow. When the overlapping area expands, the high-speed flowing medium generates local turbulence in the channel, and both enhance the impact of the water flow. At the same time, the horizontal through-structure of the first groove 43 of the upper alloy plate 41 and the second groove 44 of the lower alloy plate 42 guides the water flow to concentrate in the overlapping opening area of ​​the first groove 43 and the second guide hole 80, further strengthening the impact force. In addition, the bottom surface of the upper alloy plate 41 and the top surface of the lower alloy plate 42 are completely attached, preventing the medium from leaking from the gap between the two alloy plates. This ensures that the high-pressure medium flows in a concentrated manner in the channel formed by the first through hole 45, the second through hole 46, and the first groove 43 and the second groove 44, and its kinetic energy is not dispersed. Ultimately, this high-speed concentrated impact water flow will continuously scour the contact surfaces of the upper alloy plate 41 and the lower alloy plate 42, the inner wall of the first through hole 45, and the inner wall of the second through hole 46, removing the scale and residue attached to these parts and achieving a self-cleaning effect.

[0056] This application utilizes a valve body 10 with a circular sleeve structure, coupled with a transmission mechanism 20, a sealing mechanism 30, and a flow guiding mechanism 40. The valve stem 21 drives the upper alloy plate 41 to rotate relative to the lower alloy plate 42, causing the overlapping areas of the first through hole 45 and the second through hole 46, and the first strip groove 43 and the second flow guiding hole 80 to change synchronously. At the same time, the sealing mechanism 30 prevents leakage, thereby achieving precise flow control under high pressure. It ensures the accuracy of flow regulation while achieving reliable shut-off function. Furthermore, the double design of the sealing mechanism and the upper and lower alloy plates, which are completely fitted, forms a multi-layer seal, effectively blocking medium leakage and improving the valve's sealing reliability. The impact water flow generated when the medium flows through the dynamically changing channel completes automatic cleaning, reducing the risk of blockage. Simultaneously, the transmission mechanism enables the valve to accurately adjust, reliably shut off, efficiently self-clean, and stably operate under high pressure conditions.

[0057] In one possible implementation, the inner wall of the valve housing 10 is provided with a first step, the second end of the valve stem 21 is a pressure head, and the transmission mechanism 20 includes:

[0058] A clamping nut 22 is disposed inside the valve housing 10 and located on the first step. The outer wall of the clamping nut 22 is threadedly connected to the inner wall of the valve housing 10. A first groove is formed at the first end of the clamping nut 22.

[0059] A thrust ball bearing 23 is sleeved on the valve stem 21 and located between the clamping nut 22 and the pressure head;

[0060] The annular retaining ring 24 is fitted into the second groove circumferentially opened on the valve stem 21;

[0061] A deep groove ball bearing 25 is disposed in the first groove and sleeved on the valve stem 21, with the top surface of the deep groove ball bearing 25 in contact with the bottom surface of the annular retaining ring 24;

[0062] The valve stem 21 is rotatably nested within the clamping nut 22, and the first end of the valve stem 21 is located outside the valve housing 10.

[0063] Specifically, the first step provided on the inner wall of the valve body 10 provides an axial positioning reference for the assembly of the transmission mechanism 20; the pressure head provided at the second end of the valve stem 21 is a key structure for thrust transmission, which cooperates with other components of the transmission mechanism 20 to limit the axial movement of the valve stem 21. The bottom of the clamping nut 22 is supported on the first step of the valve body 10, and its outer wall is tightly connected to the inner wall of the valve body 10 by threads. This not only fixes the nut 22 within the valve body 10, but also provides a mounting carrier for other bearing components. The first groove at the first end of the clamping nut 22 is used to accommodate the deep groove ball bearing 25. The thrust ball bearing 23 is sleeved on the valve stem 21 and clamped between the bottom of the clamping nut 22 and the pressure head at the second end of the valve stem 21, preventing axial displacement of the valve stem during rotation. The annular retaining ring 24 is fixed in the second circumferential groove of the valve stem 21 by a ferrule, forming an axial limit for the deep groove ball bearing 25. The deep groove ball bearing 25 is installed in the first groove of the clamping nut 22 and sleeved on the valve stem 21. Its top surface is in close contact with the bottom surface of the annular retaining ring 24, which not only restricts its axial position through the annular retaining ring 24, but also provides radial support for the valve stem 21, reducing radial wobble during valve stem rotation.

[0064] The upper alloy plate 41 is fixed to the bottom end of the pressure head by two upper positioning pins 50, and the lower alloy plate 42 is fixed inside the valve body 10 by two lower positioning pins 60. In addition, a third step is provided on the inner wall of the valve body 10 as a positioning reference for the lower alloy plate, and the lower alloy plate is set on the third step.

[0065] In one possible implementation, a third groove is formed at the second end of the clamping nut 22; the top end of the thrust ball bearing 23 is engaged in the third groove.

[0066] Specifically, the end of the clamping nut 22 near the pressure head of the valve stem 21 has a third groove, the size of which matches the top of the thrust ball bearing 23, so that the top of the bearing can be precisely locked in place: this not only prevents bearing misalignment through radial constraint and avoids transmission jamming, but also allows the upper and lower ends of the bearing to fit against the inner wall of the groove and the pressure head of the valve stem respectively, so as to evenly transmit axial force and suppress the movement of the valve stem 21; together with the deep groove ball bearing 25 and the annular retaining ring 24, it can stabilize the transmission, ensure the precise adjustment of the through hole and the strip groove of the flow guiding mechanism, and improve the reliability of the valve.

[0067] In one possible implementation, the pressure head sidewall has a fourth and a fifth groove circumferentially formed, the valve housing 10 has a second step on its inner wall, and the sealing mechanism 30 includes:

[0068] Bushing 31 is located on the second step and is fitted between the pressure head and the inner wall of the valve housing 10; a sixth groove and a seventh groove are formed on the outer wall of bushing 31 in the circumferential direction;

[0069] The first sealing ring 32 is fitted inside the fourth groove and clamped between the inner wall of the bushing 31 and the fourth groove;

[0070] The second sealing ring 33 is fitted inside the fifth groove and clamped between the inner wall of the bushing 31 and the fifth groove;

[0071] The third sealing ring 34 is fitted inside the sixth groove and clamped between the outer wall of the bushing 31 and the sixth groove;

[0072] The fourth sealing ring 35 is fitted inside the seventh groove and clamped between the outer wall of the bushing 31 and the seventh groove.

[0073] Specifically, the four sealing rings, namely the first sealing ring 32, the second sealing ring 33, the third sealing ring 34, and the fourth sealing ring 35, work together to prevent the medium inside the valve body 10 from leaking outward through the gap between the pressure head at the second end of the valve stem 21 and the bushing 31, and the gap between the bushing 31 and the inner wall of the valve body 10.

[0074] In one possible implementation, the bottom of the pressure head is provided with a third strip groove 47 that horizontally penetrates the side wall of the pressure head; the bottom opening of the third strip groove 47 is opposite to the top opening of the first strip groove 43, and when the area of ​​the horizontal end face opening of the first strip groove 43 overlapping with the opening of the second guide hole 80 is the largest, the area of ​​the horizontal end face opening of the first strip groove 43 overlapping with the opening of the second guide hole 80 is also the largest.

[0075] Specifically, a third groove 47 is provided at the bottom of the pressure head at the second end of the valve stem 21. The third groove 47 runs horizontally through and through the side wall of the pressure head. The bottom opening of the third groove 47 is opposite to the top opening of the first groove 43 at the top of the upper alloy plate 41, and the two can form a continuous medium flow channel. When the valve flow is at its maximum, the bottom opening of the third groove 47 and the top opening of the first groove 43 are still completely corresponding and smoothly connected. This ensures that after the medium flows into the first groove 43 from the first through hole 45, it flows smoothly through the continuous channel of the third groove 47 and the first groove 43, avoiding the medium from stagnating at the connection between the pressure head and the upper alloy plate 41. This further optimizes the medium flow path and, together with the original structure of the flow guiding mechanism 40, improves the smoothness and accuracy of flow regulation.

[0076] In one possible implementation, the upper alloy sheet 41 and the lower alloy sheet 42 are made of cold work die steel with a hardness of HRC 60.

[0077] Specifically, the upper alloy plate 41 and the lower alloy plate 42 in the flow guiding mechanism 40 are both made of cold work die steel with a hardness of HRC 60. Cold work die steel itself has the characteristics of high strength and high wear resistance. Combined with the high hardness of HRC 60, it can effectively resist wear and deformation when the two alloy plates are in contact and rotated for a long time and are subjected to the impact and scouring of high pressure media. This ensures the accuracy of the first through hole 45, the second through hole 46 and the strip groove structure, thereby maintaining the stability of the valve flow regulation and self-cleaning function.

[0078] In one possible implementation, the valve stem 21 has a square-shaped slot in the middle, and the central axis of the slot coincides with the axis of the valve stem 21. The slot is used to cooperate with a component of a corresponding shape on the external force mechanism, so that the valve stem 21 rotates synchronously when the external force mechanism rotates.

[0079] Specifically, a square-shaped slot is provided in the middle of the valve stem 21, and the central axis of the slot is completely coincident with the axis of the valve stem 21 itself, ensuring structural symmetry and force balance. The core purpose of this slot is to cooperate with corresponding components such as square transmission rods and square connectors on external force-acting mechanisms such as valve handwheels and electric actuators. When the external force-acting mechanism is started and rotates, its corresponding component will drive the valve stem 21 to rotate synchronously through the interlocking transmission with the square slot, avoiding slippage or power transmission lag, and thus providing stable power support for the valve stem 21 to drive the upper alloy plate 41 to adjust the flow rate.

[0080] In one possible implementation, the cross-sections of the first through hole 45 and the second through hole 46 are elliptical.

[0081] Specifically, in the flow guiding mechanism 40, the first through hole 45 in the first strip groove 43 of the upper alloy plate 41 and the second through hole 46 in the second strip groove 44 of the lower alloy plate 42 both have elliptical cross sections. Compared with a circular cross section, the elliptical cross section allows the overlapping area of ​​the two through holes to change more smoothly with the rotation angle when the valve stem 21 drives the upper alloy plate 41 to rotate, avoiding sudden increases or decreases in flow regulation and improving the accuracy of small flow control. At the same time, the elliptical cross section can increase the scouring area of ​​the inner wall of the through hole. When the high-pressure medium flows through, it can form stronger local turbulence, enhance the scouring effect on the inner wall of the through hole and the mating surface of the two alloy plates, and more efficiently remove scale and residue. Combined with the flow guiding effect of the strip groove, it further optimizes the self-cleaning performance of the valve and ensures the long-term smooth flow of the medium.

[0082] In one possible implementation, the bottom outer surface of the lower alloy sheet has an eighth groove, and a fifth sealing ring 36 is fitted inside the eighth groove. The fifth sealing ring 36 is clamped between the outer wall of the lower alloy sheet 42 and the eighth groove.

[0083] Specifically, in the flow guiding mechanism 40, an eighth groove is formed on the outer surface of the bottom end of the lower alloy plate 42. A fifth sealing ring 36 is specially fitted inside the eighth groove, and the fifth sealing ring 36 is clamped between the outer wall of the lower alloy plate 42 and the groove wall of the eighth groove to seal the gap between the bottom end of the lower alloy plate 42 and the valve body 10 or other adjacent components. Together with the four sealing rings of the sealing mechanism 30, the overall sealing performance of the valve is further enhanced, effectively preventing high pressure medium from leaking from the bottom gap of the lower alloy plate 42, and ensuring the sealing reliability of the valve under high pressure conditions.

[0084] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A self-cleaning transmission structure with flow regulation and cutoff functions, characterized in that, include: The valve housing (10) is a sleeve structure, one end of which is closed. A first guide hole and a second guide hole are provided on the side wall of the valve housing (10). The first guide hole and the second guide hole are not on the same side. The transmission mechanism (20) is nested inside the valve housing (10) and located at the first end of the sleeve structure. The transmission mechanism (20) includes a valve stem (21) which can rotate under external force. The first end of the valve stem (21) is used to bear external force. The first guide hole is connected to the second end of the sleeve structure. A sealing mechanism (30) is sleeved between the transmission mechanism (20) and the inner wall of the valve housing (10) to prevent the medium inside the valve housing (10) from passing through the gap between the transmission mechanism (20) and the valve housing (10); A flow guiding mechanism (40) is nested inside the valve body (10); the flow guiding mechanism (40) includes an upper alloy plate (41) and a lower alloy plate (42), the upper alloy plate (41) is fixedly connected to the bottom of the valve stem (21); a first horizontal through groove (43) is opened at the top of the upper alloy plate (41), and two first through holes (45) are opened in the first groove (43), and the first through holes (45) vertically penetrate the upper alloy plate (41); The lower alloy sheet (42) has a second groove (44) at its bottom end, which is not connected to the side wall of the lower alloy sheet (42); two second through holes (46) are formed in the second groove (44), and the second through holes (46) vertically penetrate the lower alloy sheet (42); the second groove (44) is connected to the second end of the sleeve structure; the bottom surface of the upper alloy sheet (41) is completely attached to the top surface of the lower alloy sheet (42); When the valve stem (21) rotates under external force, the valve stem (21) drives the upper alloy plate (41) to rotate relative to the lower alloy plate (42). In the first state, the horizontal end face opening of the first strip groove (43) overlaps with the opening of the second guide hole to the largest area, and the first through hole (45) and the second through hole (46) completely overlap. In the second state, the first through hole (45) and the second through hole (46) do not overlap at all, and the horizontal end face opening of the first strip groove (43) does not overlap at all with the opening of the second guide hole; When the valve stem (21) is rotated under force, the overlapping area of ​​the cross sections of the first through hole (45) and the second through hole (46) gradually decreases / increases, and the overlapping area of ​​the horizontal end face opening of the first strip groove (43) and the opening of the second guide hole gradually decreases / increases; the channel where the cross section of the first through hole (45) and the cross section of the second through hole (46) overlap is the guide channel.

2. The self-cleaning transmission structure with flow regulation and cutoff functions according to claim 1, characterized in that, The valve housing (10) has a first step on its inner wall, the valve stem (21) has a pressure head at its second end, and the transmission mechanism (20) includes: A clamping nut (22) is disposed inside the valve housing (10) and located on the first step. The outer wall of the clamping nut (22) is threadedly connected to the inner wall of the valve housing (10). A first groove is formed at the first end of the clamping nut (22). A thrust ball bearing (23) is sleeved on the valve stem (21) and located between the clamping nut (22) and the pressure head; An annular retaining ring (24) is fitted into the second groove circumferentially opened on the valve stem (21); A deep groove ball bearing (25) is disposed in the first groove and sleeved on the valve stem (21). The top surface of the deep groove ball bearing (25) is in contact with the bottom surface of the annular retaining ring (24). The valve stem (21) is rotatably nested within the clamping nut (22), and the first end of the valve stem (21) is located outside the valve body (10).

3. The self-cleaning transmission structure with flow regulation and cutoff functions according to claim 2, characterized in that, The second end of the clamping nut (22) has a third groove; the top end of the thrust ball bearing (23) is fitted into the third groove.

4. The self-cleaning transmission structure with flow regulation and cutoff functions according to claim 2, characterized in that, The pressure head sidewall has a fourth and a fifth groove circumferentially formed, the valve housing (10) has a second step on its inner wall, and the sealing mechanism (30) includes: The bushing (31) is located on the second step and is fitted between the pressure head and the inner wall of the valve body (10); the outer wall of the bushing (31) is provided with a sixth groove and a seventh groove in the circumferential direction; The first sealing ring (32) is fitted inside the fourth groove and clamped between the inner wall of the bushing (31) and the fourth groove; The second sealing ring (33) is fitted inside the fifth groove and clamped between the inner wall of the bushing (31) and the fifth groove; The third sealing ring (34) is fitted inside the sixth groove and clamped between the outer wall of the bushing (31) and the sixth groove; The fourth sealing ring (35) is fitted inside the seventh groove and clamped between the outer wall of the bushing (31) and the seventh groove.

5. The self-cleaning transmission structure with flow regulation and cutoff functions according to claim 2, characterized in that, The bottom of the pressure head is provided with a third strip groove (47) that horizontally penetrates the side wall of the pressure head. The bottom opening of the third strip groove (47) is opposite to the top opening of the first strip groove (43), and when the area of ​​the horizontal end face opening of the first strip groove (43) overlapping with the opening of the second guide hole is the largest, the area of ​​the horizontal end face opening of the first strip groove (43) overlapping with the opening of the second guide hole is also the largest.

6. The self-cleaning transmission structure with flow regulation and cutoff functions according to claim 1, characterized in that, The upper alloy sheet (41) and the lower alloy sheet (42) are made of cold work die steel with a hardness of HRC 60.

7. The self-cleaning transmission structure with flow regulation and cutoff functions according to claim 1, characterized in that, The valve stem (21) has a square-shaped hole in the middle, and the central axis of the hole coincides with the axis of the valve stem (21). The hole is used to cooperate with a component of the corresponding shape on the external force mechanism so that the valve stem (21) rotates synchronously when the external force mechanism rotates.

8. The self-cleaning transmission structure with flow regulation and cutoff functions according to claim 1, characterized in that, The cross-sections of the first through hole (45) and the second through hole (46) are elliptical.

9. The self-cleaning transmission structure with flow regulation and cutoff functions according to claim 1, characterized in that, The bottom outer surface of the lower alloy sheet has an eighth groove, and a fifth sealing ring (36) is fitted inside the eighth groove. The fifth sealing ring (36) is clamped between the outer wall of the lower alloy sheet (42) and the eighth groove.

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