A high-pressure grinding wheel adjusting valve sealing structure

Abstract

The utility model provides a kind of high pressure grinding wheel regulating valve sealing structure, comprising: the first flow guide hole of the sleeve structure inside conduction being opened with the side wall of valve housing;Sealing mechanism prevents the gap between transmission mechanism and valve housing inside medium of valve housing pass;The bottom of flow guide mechanism and the bottom opening of valve housing conduction, the first flow guide hole of the side of flow guide mechanism and valve housing conduction, fluid medium is from the flow guide passage in flow guide mechanism after entering the bottom of sleeve structure, from the first flow guide hole flow;When the first end of transmission mechanism rotates under the action of external force, the flow area of flow guide passage changes.Thereby the closed flow space of high pressure medium is provided by valve housing, cooperate with the rotation input of transmission mechanism and the flow area adjustment of flow guide mechanism, the direct control of medium flow is realized;At the same time, sealing mechanism tightly fills transmission gap, effectively blocks the leakage path of high pressure medium, so as to ensure the reliable regulation of medium flow under high pressure environment.

Description

Technical Field

[0001] This utility model relates to the field of oil water injection technology, and more specifically, to a sealing structure for a high-pressure grinding wheel regulating valve. Background Technology

[0002] In the operation system of a high-pressure grinding wheel, the regulating valve, as the core component controlling the flow of the medium, is crucial to the working efficiency and stability of the grinding wheel. However, existing regulating valves have many shortcomings in practical applications: On the one hand, because the grinding wheel needs to withstand the action of high-pressure fluid media during operation, the sealing effect between the transmission components and the housing in traditional structures is poor, making it prone to media leakage. This not only wastes resources but also causes system pressure fluctuations, affecting the normal operation of the grinding wheel. On the other hand, existing regulating mechanisms have difficulty accurately controlling changes in the flow cross-sectional area when regulating flow, resulting in insufficient flow regulation accuracy. Furthermore, some structures are prone to jamming and wear during long-term use, shortening the service life of the equipment. In addition, the high-pressure environment places high demands on the overall structural strength of the regulating valve. Conventional structures are prone to deformation under high pressure, which affects the smoothness of transmission and the stability of flow guidance, making it impossible to simultaneously ensure the reliability of sealing performance and regulation function.

[0003] Therefore, it is necessary to provide a structure to address the problems existing in the prior art. Utility Model Content

[0004] The main objective of this invention is to provide a sealing structure for a high-pressure grinding wheel regulating valve, so as to at least solve the problems of unreliable high-pressure sealing, low flow regulation accuracy and poor structural adaptability in the prior art.

[0005] To achieve the above objectives, this utility model provides a sealing structure for a high-pressure grinding wheel regulating valve, comprising: a valve housing, wherein the valve housing is a sleeve structure with a circular inner wall cross-section, and a first guide hole communicating with the interior of the sleeve structure is opened on the side wall of the valve housing; a transmission mechanism, which is nested within the valve housing, the transmission mechanism including a valve stem, the valve stem being rotatable under external force, the first end of the valve stem being used to bear the external force; a sealing mechanism, which is sleeved between the transmission mechanism and the inner wall of the valve housing, for preventing the medium inside the valve housing from passing through the gap between the transmission mechanism and the valve housing; and a guide mechanism, nested within the valve housing; the bottom end of the guide mechanism is communicating with the bottom opening of the valve housing, and one side of the guide mechanism is communicating with the first guide hole of the valve housing, wherein the fluid medium enters the guide channel in the guide mechanism from the bottom of the sleeve structure and flows out from the first guide hole; wherein the guide mechanism is connected to the second end of the valve stem, and when the valve stem rotates under external force, the flow cross-sectional area of ​​the guide channel changes.

[0006] 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:

[0007] 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.

[0008] A thrust ball bearing is sleeved on the valve stem and located between the clamping nut and the pressure head;

[0009] An annular retaining ring is fitted into the second groove circumferentially opened on the valve stem;

[0010] 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;

[0011] The valve stem is rotatably nested within the clamping nut, and the first end of the valve stem is located outside the valve body.

[0012] Optionally, the cross-section of the first end of the valve stem is a regular hexagon.

[0013] 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.

[0014] 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:

[0015] 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;

[0016] The first sealing ring is fitted inside the fourth groove and clamped between the inner wall of the bushing and the fourth groove;

[0017] The second sealing ring is fitted inside the fifth groove and clamped between the inner wall of the bushing and the fifth groove;

[0018] The third sealing ring is fitted inside the sixth groove and clamped between the outer wall of the bushing and the sixth groove;

[0019] The fourth sealing ring is fitted inside the seventh groove and clamped between the outer wall of the bushing and the seventh groove.

[0020] Optionally, the valve housing inner wall is provided with a third step, and the flow guiding mechanism includes:

[0021] The first alloy sheet has its bottom end fixed on the third step. A first strip groove is formed in the middle of the first alloy sheet. Two non-contacting first through holes are formed inside the first strip groove. The first through holes penetrate the first alloy sheet in the vertical direction.

[0022] The second alloy sheet has its top end fixed to the bottom end of the pressure head. The bottom surface of the second alloy sheet can be horizontally attached to and rotated and slid with the top surface of the first alloy sheet. The second alloy sheet has a second strip groove that penetrates through the second alloy sheet. The second strip groove has two non-contacting second through holes that penetrate the second alloy sheet in the vertical direction.

[0023] When the valve stem rotates under the action of external force, the valve stem drives the second alloy sheet to rotate relative to the first alloy sheet through the pressure head, and: in the first state, the cross-section of the first through hole and the cross-section of the second through hole are completely coincident, and the end of the second strip groove is completely connected to the first guide hole;

[0024] In the second state, the first through hole and the second through hole do not overlap at all; during the transition from the first state to the second state, the overlapping area of ​​the cross sections of the first through hole and the second through hole gradually decreases; the channel where the cross sections of the first through hole and the second through hole overlap is a flow guiding channel.

[0025] In the first state, the end face opening of the second strip groove is completely aligned with the first end opening of the first guide hole, and the end face opening of the strip groove is entirely within its cross-sectional area; during rotation, the portion of the end face opening of the second strip groove within the cross-sectional area of ​​the first guide hole continuously shrinks; in the second state, the end face opening of the second strip groove is completely detached from the cross-sectional area of ​​the first guide hole opening.

[0026] The fluid medium enters the first strip groove from the bottom of the sleeve structure, enters the guide channel from the first strip groove, and then flows out from the first guide hole.

[0027] Optionally, the cross-section of the first through hole and the cross-section of the second through hole are elliptical.

[0028] Optionally, the bottom outer surface of the first 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 first alloy sheet and the eighth groove.

[0029] This utility model discloses a sealing structure for a high-pressure grinding wheel regulating valve, comprising: a valve housing, which is a sleeve structure with a circular inner wall cross-section, and a first guide hole communicating with the interior of the sleeve structure on the side wall of the valve housing; a transmission mechanism, which is nested within the valve housing, and includes a valve stem that can rotate under external force, with the first end of the valve stem bearing the external force; a sealing mechanism, which is sleeved between the valve housing and the inner wall of the valve housing to prevent the medium inside the valve housing from passing through the gap between the transmission mechanism and the valve housing; and a guide mechanism, nested within the valve housing, with its bottom end communicating with the bottom opening of the valve housing and one side communicating with the first guide hole of the valve housing. Fluid medium enters the guide channel in the guide mechanism from the bottom of the sleeve structure and flows out from the first guide hole. The guide mechanism is connected to the second end of the valve stem, and when the valve stem rotates under external force, the flow cross-sectional area of ​​the guide channel changes. This design provides a sealed flow space for the high-pressure medium through the valve body. Combined with the rotary input of the transmission mechanism and the adjustment of the flow cross-sectional area by the guide mechanism, direct control of the medium flow rate is achieved. Simultaneously, the sealing mechanism tightly fills the transmission gap, effectively blocking leakage paths for the high-pressure medium. The coordinated operation of all components ensures reliable regulation of the medium flow rate under high-pressure conditions while achieving both high-pressure sealing and precise control. Attached Figure Description

[0030] 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:

[0031] Figure 1 This is a schematic diagram of the sealing structure of the high-pressure grinding wheel regulating valve according to an embodiment of the present utility model;

[0032] Figure 2 This is a bottom view of the first alloy sheet provided according to an embodiment of the present utility model;

[0033] Figure 3 This is a top view schematic diagram of the second alloy sheet provided according to an embodiment of the present utility model;

[0034] 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.

[0035] Figure label:

[0036] 10. Valve body; 20. Transmission mechanism; 21. Compression nut; 22. Valve stem; 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. First alloy sheet; 42. Second alloy sheet; 43. First through hole; 44. Second through hole; 45. First groove; 46. Second groove; 50. First pin; 60. Second pin. Detailed Implementation

[0037] 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.

[0038] like Figures 1-4 As shown, a sealing structure for a high-pressure mill wheel regulating valve includes:

[0039] The valve housing 10 is a sleeve structure with a circular inner wall cross-section, and a first guide hole is opened on the side wall of the valve housing 10 to communicate with the inside of the sleeve structure;

[0040] A transmission mechanism 20 is nested within the valve housing 10. The transmission mechanism 20 includes a valve stem 22, which can rotate under external force. The first end of the valve stem 22 is used to bear the external force.

[0041] 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.

[0042] A flow guiding mechanism 40 is nested inside the valve housing 10; the bottom end of the flow guiding mechanism 40 is connected to the bottom opening of the valve housing 10, and one side of the flow guiding mechanism 40 is connected to the first flow guiding hole of the valve housing 10. After the fluid medium enters the flow guiding channel in the flow guiding mechanism 40 from the bottom of the sleeve structure, it flows out from the first flow guiding hole.

[0043] The flow guiding mechanism 40 is connected to the second end of the valve stem 22. When the valve stem 22 is rotated by an external force, the flow cross-sectional area of ​​the flow guiding channel changes.

[0044] Specifically, in a high-pressure grinding wheel operating system, the sealing structure of the high-pressure grinding wheel regulating valve is the core component of the regulating valve. It controls the flow rate of high-pressure fluid media, such as grinding fluid or cooling oil, to maintain a stable pressure environment for the grinding wheel operation. When the grinding wheel is performing high-speed cutting or grinding operations, the system needs to dynamically adjust the flow rate of the medium according to changes in working conditions. When the load increases, the flow rate should be appropriately reduced to avoid a sudden pressure rise, or the basic flow rate should be maintained to ensure the cooling effect during stable processing.

[0045] The high-pressure grinding wheel regulating valve sealing structure in this application consists of four parts: valve housing 10, transmission mechanism 20, sealing mechanism 30, and flow guiding mechanism 40. Valve housing 10 is a circular sleeve structure, with a first flow guiding hole on its side wall serving as a channel for medium outflow. The transmission mechanism 20 is installed inside the valve housing 10 and includes a valve stem 22. The first end of the valve stem 22 extends out of the valve housing 10 to withstand external forces, which are applied manually or electrically. The sealing mechanism 30 tightly wraps between the transmission mechanism 20 and the inner wall of the valve housing 10, forming a sealing layer to prevent leakage of the internal high-pressure medium from the transmission gap. The flow guiding mechanism 40 is nested inside the valve housing 10, with its bottom end connected to the bottom opening of the valve housing 10, which serves as the fluid medium inlet. One side of the flow guiding mechanism 40 communicates with the first flow guiding hole, and a flow guiding channel is formed inside the flow guiding mechanism 40. When the first end of the valve stem 22 is subjected to external force, the valve stem 22 rotates, and the second end of the valve stem 22 directly drives the flow guiding mechanism 40 to move. By adjusting the flow cross-sectional area of ​​the medium after entering from the bottom and flowing through the flow guiding channel to the first flow guiding hole, flow control is achieved.

[0046] This application provides a sealed flow space for high-pressure media through the valve body 10. Combined with the rotary input of the transmission mechanism 20 and the flow cross-sectional area adjustment of the guide mechanism 40, direct control of the media flow rate is achieved. Simultaneously, the sealing mechanism 30 tightly fills the transmission gap, effectively blocking the leakage path of the high-pressure media. The coordinated operation of these components ensures reliable regulation of the media flow rate under high-pressure conditions while achieving both high-pressure sealing and precise control.

[0047] In one possible implementation, the valve housing 10 has a first step on its inner wall, and the transmission mechanism 20 includes:

[0048] A clamping nut 21 is disposed inside the valve housing 10 and located on the first step. The outer wall of the clamping nut 21 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 21.

[0049] A thrust ball bearing 23 is sleeved on the valve stem 22 and located between the clamping nut 21 and the pressure head;

[0050] The annular retaining ring 24 is fitted into the second groove circumferentially opened on the valve stem 22;

[0051] A deep groove ball bearing 25 is disposed in the first groove and sleeved on the valve stem 22, with the top surface of the deep groove ball bearing 25 in contact with the bottom surface of the annular retaining ring 24;

[0052] The valve stem 22 is rotatably nested within the clamping nut 21, and the first end of the valve stem 22 is located outside the valve housing 10.

[0053] Specifically, the first step on the inner wall of the valve body 10 provides a positioning base for the clamping nut 21. The outer wall of the clamping nut 21 is threadedly connected to the inner wall of the valve body 10 and fixed on the first step. A deep groove ball bearing 25 is installed in the first groove at the first end of the clamping nut 21. The middle part of the valve stem 22 is rotatably nested in the clamping nut 21, the second end is a pressure head acting on the sealing mechanism, and the first end extends out of the valve body 10 to bear the driving force. A thrust ball bearing 23 is sleeved on the valve stem 22 and located between the clamping nut 21 and the pressure head. When a rotational driving force is applied through the first end of the valve stem 22, the driving force will form an axial load in the axial direction of the valve stem 22. This axial load is transmitted to the thrust ball bearing 23 through the valve stem 22. The thrust ball bearing 23 bears and disperses this axial force, avoiding the axial force from acting directly on the deep groove ball bearing 25 and the clamping nut 21, which would cause abnormal wear or structural deformation. The annular retaining ring 24 is sleeved in the second groove of the valve stem and contacts the top surface of the deep groove ball bearing 25, restricting the axial displacement of the deep groove ball bearing 25.

[0054] By working together with the thrust ball bearing 23 and the deep groove ball bearing 25, the axial and radial loads can be independently carried. With the radial limiting of the annular retaining ring 24, the rotational resistance and wear of the valve stem 22 are effectively reduced. The threaded clamping nut makes it easy to adjust the bearing preload and improve the transmission accuracy.

[0055] In one possible implementation, the first end of the valve stem 22 has a regular hexagonal cross-section.

[0056] Specifically, the first end of the valve stem 22 has a regular hexagonal cross-section, which facilitates rotational operation using a standard wrench tool and provides a stable rotational drive interface.

[0057] In one possible implementation, a third groove is formed at the second end of the clamping nut 21; the top end of the thrust ball bearing 23 is engaged in the third groove.

[0058] Specifically, the third groove at the second end of the clamping nut 21 locks the top of the thrust ball bearing 23 to prevent axial movement of the bearing and ensure that it is securely installed between the valve stem 22 and the clamping nut 21.

[0059] 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:

[0060] 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;

[0061] 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;

[0062] 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;

[0063] 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;

[0064] 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.

[0065] Specifically, the first sealing ring 32 and the second sealing ring 33 are respectively enclosed in the fourth and fifth grooves circumferentially opened on the side wall of the pressure head. The two are clamped between the inner wall of the bushing 31 and the fourth and fifth grooves, forming a radial sealing barrier when the valve stem 22 moves axially, preventing the medium from leaking along the gap between the valve stem 22 and the pressure head. The bushing 31 is installed on the second step set on the inner wall of the valve body 10. The third sealing ring 34 and the fourth sealing ring 35 are respectively enclosed in the sixth and seventh grooves circumferentially opened on its outer wall. The third sealing ring 34 and the fourth sealing ring 35 are respectively clamped between the outer wall of the bushing 31 and the sixth and seventh grooves, respectively, to construct an axial seal between the valve body 10 and the bushing 31, preventing the medium from seeping out from the radial gap between the valve body 10 and the bushing 31. The bushing 31, as an intermediate bearing component, not only isolates the medium from the core sealing component, but also disperses the sealing stress through the inner and outer double ring groove layout, avoiding local compression failure. The multiple sealing rings work together to form a "radial + axial" dual sealing system, improving the sealing reliability under high pressure conditions. The first sealing ring 32 and the second sealing ring 33 are dynamic sealing structures that rotate synchronously with the pressure head, ensuring that the sealing surfaces remain in contact when the valve stem 22 rotates, preventing media leakage from the gap. The third sealing ring 34 and the fourth sealing ring 35 are static sealing structures.

[0066] In one possible implementation, the valve housing 10 has a third step on its inner wall, and the flow guiding mechanism 40 includes:

[0067] The first alloy sheet 41 is fixed at its bottom end on the third step. A first strip groove 45 is provided in the middle of the first alloy sheet 41. Two non-contacting first through holes 43 are provided inside the first strip groove 45. The first through holes 43 penetrate the first alloy sheet 41 in the vertical direction.

[0068] The second alloy sheet 42 has its top end fixed to the bottom end of the pressure head. The bottom surface of the second alloy sheet 42 can be horizontally attached to and rotated and slid with the top surface of the first alloy sheet 41. The second alloy sheet 42 has a second strip groove 46 that penetrates the second alloy sheet 42. The second strip groove 46 has two non-contacting second through holes 44 inside. The second through holes 44 penetrate the second alloy sheet 42 in the vertical direction.

[0069] When the valve stem 22 rotates under the action of external force, the valve stem 22 drives the second alloy sheet 42 to rotate relative to the first alloy sheet 41 through the pressure head, and: in the first state, the cross section of the first through hole 43 is completely coincident with the cross section of the second through hole 44, and the end of the second strip groove 46 is completely connected to the first guide hole;

[0070] In the second state, the first through hole 43 and the second through hole 44 do not overlap at all; during the transition from the first state to the second state, the overlapping area of ​​the cross sections of the first through hole 43 and the second through hole 44 gradually decreases; the channel where the cross sections of the first through hole 43 and the second through hole 44 overlap is a flow guiding channel.

[0071] In the first state, the end face opening of the second strip groove 46 is completely aligned with the first end opening of the first guide hole, and the entire end face opening of the strip groove is within its cross-sectional area; during rotation, the portion of the end face opening of the second strip groove 46 within the cross-sectional area of ​​the first guide hole opening continuously shrinks; in the second state, the end face opening of the second strip groove 46 is completely separated from the cross-sectional area of ​​the first guide hole opening.

[0072] The fluid medium enters the first strip groove 45 from the bottom of the sleeve structure, enters the flow channel from the first strip groove 45, and then flows out from the first flow hole.

[0073] Specifically, the bottom end of the first alloy sheet 41 is fixed to the third step by two first pins 50, and the top end of the second alloy sheet 42 is fixed to the bottom end of the pressure head by two second pins 60. The two first pins 50 are symmetrically located on both sides of the first groove 45, and the two second pins 60 are symmetrically located on both sides of the second groove 46.

[0074] The first alloy sheet 41 and the second alloy sheet 42 form a dynamic sealing fit through a sliding horizontal contact surface. When the valve stem 22 drives the second alloy sheet 42 to rotate, the overlapping area of ​​the cross sections of the first through hole 43 and the second through hole 44 changes continuously, thereby achieving a smooth transition of the flow guiding channel from fully open to fully closed, avoiding pressure shock and fluid turbulence caused by sudden flow interception when traditional valves are opened and closed.

[0075] During the rotation adjustment process, the area of ​​the second strip groove 46 facing the port of the first guide hole gradually decreases, thereby gradually adjusting the fluid flow rate. The fluid medium enters the first strip groove 45 from the bottom of the sleeve structure, flows out from the first guide hole through the overlapping area of ​​the guide channel with overlapping cross-sections, namely the first through hole and the second through hole. By rotating the valve stem 22, the second alloy plate 42 rotates relative to the first alloy plate 41, directly controlling the flow area of ​​the guide channel, thereby adjusting the fluid flow rate. At the same time, it reduces the medium flow resistance and the influence of local eddies, improving the stability and control accuracy of the valve under high pressure differential conditions.

[0076] In one possible implementation, the cross-section of the first through hole 43 and the cross-section of the second through hole 44 are elliptical.

[0077] Specifically, by utilizing the directional characteristics of the major and minor axes of the ellipse, the change in the overlapping area of ​​the cross sections of the first through hole 43 and the second through hole 44 during relative rotation becomes more continuous and smooth, effectively eliminating fluid impact fluctuations caused by abrupt gaps when switching traditional circular through holes; the elliptical structure increases the perimeter of the fluid flow path under the same opening conditions, reduces the local flow velocity of the medium when flowing through the through hole, reduces flow resistance and eddy generation, thereby improving the fluid throughput efficiency under high pressure differential conditions.

[0078] In one possible implementation, the bottom outer surface of the first alloy sheet 41 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 first alloy sheet 41 and the eighth groove.

[0079] Specifically, a fifth sealing ring 36 is provided in the eighth groove on the outer surface of the bottom end of the first alloy sheet 41, which can effectively prevent fluid leakage along the gap between the first alloy sheet and the third step of the valve body 10, and enhance the sealing reliability of the connection between the flow guiding mechanism and the valve body. Among them, the fifth sealing ring 36 is a static sealing structure.

[0080] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sealing structure for a high-pressure grinding wheel regulating valve, characterized in that, include: Valve housing (10), the valve housing (10) is a sleeve structure with a circular inner wall cross-section, and the side wall of the valve housing (10) is provided with a first guide hole that communicates with the inside of the sleeve structure; The transmission mechanism (20) is nested inside the valve body (10). The transmission mechanism (20) includes a valve stem (22), which can rotate under external force. The first end of the valve stem (22) is used to bear the external force. 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 housing (10); the bottom end of the flow guiding mechanism (40) is connected to the bottom opening of the valve housing (10), and one side of the flow guiding mechanism (40) is connected to the first flow guiding hole of the valve housing (10). After the fluid medium enters the flow guiding channel in the flow guiding mechanism (40) from the bottom of the sleeve structure, it flows out from the first flow guiding hole. The flow guiding mechanism (40) is connected to the second end of the valve stem (22). When the valve stem (22) is rotated by an external force, the flow cross-sectional area of ​​the flow guiding channel changes.

2. The sealing structure of the high-pressure grinding wheel regulating valve according to claim 1, characterized in that, The valve housing (10) has a first step on its inner wall, the valve stem (22) has a pressure head at its second end, and the transmission mechanism (20) includes: A clamping nut (21) is disposed inside the valve housing (10) and located on the first step. The outer wall of the clamping nut (21) 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 (21). A thrust ball bearing (23) is sleeved on the valve stem (22) and located between the clamping nut (21) and the pressure head; An annular retaining ring (24) is fitted into the second groove circumferentially opened on the valve stem (22); A deep groove ball bearing (25) is disposed in the first groove and sleeved on the valve stem (22). 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 (22) is rotatably nested inside the clamping nut (21), and the first end of the valve stem (22) is located outside the valve body (10).

3. The sealing structure of the high-pressure grinding wheel regulating valve according to claim 2, characterized in that, The first end of the valve stem (22) has a regular hexagonal cross section.

4. The sealing structure of the high-pressure grinding wheel regulating valve according to claim 2, characterized in that, The second end of the clamping nut (21) has a third groove; the top end of the thrust ball bearing (23) is fitted into the third groove.

5. The sealing structure of the high-pressure grinding wheel regulating valve 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.

6. The sealing structure of the high-pressure grinding wheel regulating valve according to claim 2, characterized in that, The valve housing (10) has a third step on its inner wall, and the flow guiding mechanism (40) includes: The bottom end of the first alloy sheet (41) is fixed on the third step. A first strip groove (45) is provided in the middle of the first alloy sheet (41). Two non-contact first through holes (43) are provided inside the first strip groove (45). The first through holes (43) penetrate the first alloy sheet (41) in the vertical direction. The second alloy sheet (42) is fixed at the bottom end of the pressure head. The bottom surface of the second alloy sheet (42) and the top surface of the first alloy sheet (41) can be horizontally attached and rotated and slid. The second alloy sheet (42) has a second strip groove (46) that penetrates the second alloy sheet (42). The second strip groove (46) has two non-contact second through holes (44) inside. The second through holes (44) penetrate the second alloy sheet (42) in the vertical direction. When the valve stem (22) rotates under the action of external force, the valve stem (22) drives the second alloy sheet (42) to rotate relative to the first alloy sheet (41) through the pressure head, and: when in the first state, the cross section of the first through hole (43) is completely coincident with the cross section of the second through hole (44), and the end of the second strip groove (46) is completely connected to the first guide hole; In the second state, the first through hole (43) and the second through hole (44) do not overlap at all; during the transition from the first state to the second state, the overlapping area of ​​the cross sections of the first through hole (43) and the second through hole (44) gradually decreases; the channel where the cross section of the first through hole (43) overlaps with the cross section of the second through hole (44) is a flow channel; In the first state, the end face opening of the second strip groove (46) is completely aligned with the first end opening of the first guide hole, and the end face opening of the strip groove is entirely within its cross-sectional area; during rotation, the portion of the end face opening of the second strip groove (46) within the cross-sectional area of ​​the first guide hole continuously shrinks; in the second state, the end face opening of the second strip groove (46) completely detaches from the cross-sectional area of ​​the first guide hole opening. The fluid medium enters the first strip groove (45) from the bottom of the sleeve structure, enters the flow channel from the first strip groove (45), and flows out from the first flow hole.

7. The sealing structure of the high-pressure grinding wheel regulating valve according to claim 6, characterized in that, The cross-sections of the first through hole (43) and the second through hole (44) are elliptical.

8. The sealing structure of the high-pressure grinding wheel regulating valve according to claim 6, characterized in that, The bottom outer surface of the first alloy sheet (41) 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 first alloy sheet (41) and the eighth groove.

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