Multi-section type electric adjusting control valve

Abstract

The utility model provides a multi-section type electric adjusting control valve which comprises an adjusting assembly, the adjusting assembly is composed of a fixing plate, a fixing cylinder and a buffering cylinder, the fixing plate is fixedly connected to the upper surface of the fixing cylinder through bolts, an inner cavity of the fixing cylinder is fixedly connected with the buffering cylinder, and the inner side face of the buffering cylinder is symmetrically connected with partition plates; limiting rods are symmetrically connected to the upper surface of the buffering cylinder, the upper ends of the limiting rods abut against the lower surface of a fixing plate, meanwhile, a through hole is formed in the middle of the fixing plate, an auxiliary sealing sleeve is fixedly connected into the through hole, and the lower end of a valve rod assembly penetrates through the auxiliary sealing sleeve to be slidably connected into the buffering cylinder and is fixedly connected with a moving ring. Through cooperation of the fixing plate, the fixing cylinder, the buffer cylinder, the partition plate, the valve rod assembly and the movable ring, the control valve can conduct corresponding multi-section buffer pressure reduction on fluid media flowing in the control valve, the sealing effect can be enhanced, the machining difficulty can be lowered, and the machining cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, specifically to a multi-stage electric regulating control valve. Background Technology

[0002] Currently, in industries such as petroleum, chemical, pharmaceutical, metallurgy, and power, sleeve valves are widely used due to their advantages such as large capacity, excellent dynamic stability, high adjustment accuracy, and diverse adjustment curves. Sleeve valves are high-performance regulating valves suitable for harsh working conditions. However, common sleeve valves can only control the flow of fluid and cannot reduce fluid pressure. For working conditions with high pressure differentials (pressure difference across the valve greater than 10MPa), most sleeve valves adopt multi-stage pressure reduction structures. Some existing sleeve valves use a structure combining a main seal and multiple secondary seals. The main seal structure is formed between the valve core end and the sleeve end. Multiple annular protrusions are provided in the vertical direction inside the sleeve. Multiple secondary seal structures are formed by the contact between the annular protrusions and the valve core. However, in order to form the above-mentioned secondary seal structure, the gap between the valve core and the annular protrusions must be reduced. When the valve is opened, friction will occur between the valve core and the sleeve, making the secondary seal structure prone to wear and difficult to open. In addition, the formation of the sealing surface must be achieved through strict precision machining. Multiple secondary seal structures will lead to machining difficulties and increased costs. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, a multi-stage electric regulating control valve is provided to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, a multi-stage electric regulating control valve is provided, comprising: a regulating assembly, which is fixedly connected to the inside of a valve body via a mounting groove; a valve cover assembly is fixedly connected to the upper surface of the valve body; an electric rod is fixedly connected to the upper surface of the valve cover assembly via a mounting bracket; and the lower end of a valve stem assembly is slidably connected within the regulating assembly. The regulating assembly consists of a fixed plate, a fixed cylinder, and a buffer cylinder. The fixed plate is fixedly connected to the upper surface of the fixed cylinder via bolts; a buffer cylinder is fixedly connected to the inner cavity of the fixed cylinder; partition plates are symmetrically connected to the inner side of the buffer cylinder; and limit rods are symmetrically connected to the upper surface of the buffer cylinder. The upper end of the limit rods abuts against the lower surface of the fixed plate. A through hole is opened in the middle of the fixed plate, and a secondary sealing sleeve is fixedly connected within the through hole. The lower end of the valve stem assembly passes through the secondary sealing sleeve and is slidably connected within the buffer cylinder. A moving ring is fixedly connected to the lower end of the valve stem assembly; a guide ring is fixedly connected to the upper surface of the moving ring; and a sealing layer is fixedly connected to the lower surface of the moving ring.

[0005] Preferably, the mounting groove in the middle of the valve body is cylindrical, and the mounting groove is connected to the liquid inlet groove and the liquid outlet groove at both ends of the valve body respectively. Multiple sets of main sealing strips are fixedly connected at equal intervals along the axial direction at the lower end of the inner side of the mounting groove. At the same time, the multiple sets of main sealing strips are all annular structures, and the axial section of the main sealing strip is semi-circular.

[0006] Preferably, the fixed cylinder has an overall cylindrical structure, and the lower end of the outer arc surface of the fixed cylinder is fixedly connected to the main sealing sleeve, which has a cylindrical structure and the surface of the main sealing sleeve abuts against the main sealing strip. Buffer grooves are provided in the middle and upper part of the outer side of the fixed cylinder, and the buffer grooves have a cylindrical structure.

[0007] Preferably, the upper end of the fixed cylinder has six sets of liquid inlets at equal intervals around the circumference, and the bottom of the inner cavity of the fixed cylinder has a liquid outlet with a frustum-shaped structure. The fixed plate has a circular structure, and the lower surface of the fixed plate has a corresponding fitting groove relative to the upper surface of the fixed cylinder. At the same time, the upper end of the fixed cylinder is fixedly connected to the fitting groove by bolts.

[0008] Preferably, the buffer cylinder has an overall cylindrical structure, the outer side of the buffer cylinder and the inner cavity of the fixed cylinder are matched in size, and a through-hole is opened at the bottom of the inner cavity of the buffer cylinder relative to the liquid outlet. Six sets of limiting rods are fixedly connected around the upper surface of the buffer cylinder at equal intervals in the circumferential direction. At the same time, all six sets of limiting rods have a cylindrical structure, and the upper surface of the limiting rods abuts against the lower surface of the fixed plate.

[0009] Preferably, the upper surface of the buffer cylinder and the bottom of the liquid inlet are on the same horizontal plane, while the limiting rod and the liquid inlet are staggered. The inner cavity of the buffer cylinder is fixedly connected with three sets of partition plates at equal intervals along the axial direction. All three sets of partition plates are circular ring structures. At the same time, the inner cavity of the buffer cylinder is divided into four sets of adjustment grooves by the partition plates. The bottom of each adjustment groove is fixedly connected with a secondary sealing strip. The secondary sealing strip is circular ring structure, and the cross-section of the secondary sealing strip is semi-circular structure.

[0010] Preferably, four sets of movable rings are fixedly connected at equal intervals at the lower end of the valve stem assembly. The four sets of movable rings are slidably connected in four sets of adjusting grooves, and the movable rings are in the form of a circular ring structure. The guide ring fixedly connected to the upper surface of the movable ring is in the form of a hollow frustum structure, and the sealing layer fixedly connected to the lower surface of the movable ring is in the form of a circular ring structure. At the same time, an auxiliary groove is opened at the position of the lower end of the valve stem assembly relative to the through-hole of the partition plate. The axial section of the auxiliary groove is in the form of an isosceles trapezoidal structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are: through the cooperation of the moving ring, sealing layer, partition plate and secondary sealing strip, the various adjustment grooves divided in the inner cavity of the buffer cylinder can be conveniently sealed and closed. Through the abutting seal between the secondary sealing strip and the sealing layer, the sealing effect can be enhanced, wear can be effectively reduced, the difficulty of opening and closing the inner cavity of the buffer cylinder can be reduced, and the processing difficulty of the sealing structure of the inner cavity of the control valve can be effectively reduced, thus reducing the processing cost. Attached Figure Description

[0012] Figure 1 This is a front view schematic diagram of an embodiment of the present utility model.

[0013] Figure 2 This is a front view schematic diagram of the adjustment component according to an embodiment of the present utility model.

[0014] Figure 3 This is a top view of the adjustment component according to an embodiment of the present invention.

[0015] Figure 4 This is an embodiment of the present utility model. Figure 1 Enlarged diagram of point A.

[0016] In the diagram: 1. Valve body; 2. Adjustment assembly; 3. Valve cover assembly; 4. Valve stem assembly; 5. Electric rod; 6. Fixing plate; 7. Secondary sealing sleeve; 8. Limiting rod; 9. Buffer cylinder; 10. Moving ring; 11. Guide ring; 12. Sealing layer; 13. Separator plate; 14. Main sealing sleeve; 15. Secondary sealing strip; 16. Fixing cylinder; 17. Main sealing strip. Detailed Implementation

[0017] Reference Figures 1 to 4 As shown, this utility model provides a multi-stage electric regulating control valve, including: a regulating assembly 2, a valve body 1 with the regulating assembly 2 fixedly connected inside via a mounting groove, a valve cover assembly 3 fixedly connected to the upper surface of the valve body 1, and an electric rod 5 fixedly connected to the upper surface of the valve cover assembly 3 via a mounting bracket, and the lower end of the valve rod assembly 4 slidably connected inside the regulating assembly 2. The regulating assembly 2 consists of a fixing plate 6, a fixing cylinder 16, and a buffer cylinder 9, and the fixing plate 6 is fixedly connected to the upper surface of the fixing cylinder 16 by bolts, and the inner cavity of the fixing cylinder 16... A buffer cylinder 9 is fixedly connected, and a partition plate 13 is symmetrically connected to the inner side of the buffer cylinder 9. A limiting rod 8 is symmetrically connected to the upper surface of the buffer cylinder 9. The upper end of the limiting rod 8 abuts against the lower surface of the fixed plate 6. At the same time, a through hole is opened in the middle of the fixed plate 6, and a secondary sealing sleeve 7 is fixedly connected in the through hole. The lower end of the valve stem assembly 4 passes through the secondary sealing sleeve 7 and is slidably connected to the buffer cylinder 9. A moving ring 10 is fixedly connected to the lower end of the valve stem assembly 4. A guide ring 11 is fixedly connected to the upper surface of the moving ring 10, and a sealing layer 12 is fixedly connected to the lower surface of the moving ring 10.

[0018] In this embodiment, the fluid medium flows in from the inlet groove inside the valve body 1 and flows out from the outlet groove inside the valve body 1. The fluid medium in the inlet groove flows into the outlet groove through the regulating component 2 in the mounting groove. The fluid medium in the mounting groove flows into the inner cavities of the fixed cylinder 16 and the buffer cylinder 9 through the inlet at the upper end of the fixed cylinder 16. The fluid medium in the inner cavity of the buffer cylinder 9 flows into the corresponding regulating groove through the through hole in the middle of the partition plate 13. The multiple regulating grooves in the inner cavity of the buffer cylinder 9 can effectively enhance the buffering and pressure reduction effect on the fluid medium through the multi-stage buffer structure. When the regulating control is activated... When the valve needs to be closed, the switch of the electric lever 5 is activated. The telescopic rod of the electric lever 5 pushes the valve stem assembly 4 to move down synchronously through the connector. The moving ring 10 at the lower end of the valve stem assembly 4 can push the sealing layer 12 to abut the bottom of the corresponding adjustment groove, so that the secondary sealing strip 15 at the bottom of the adjustment groove can abut the sealing layer 12. Thus, through the cooperation of the moving ring 10 and the sealing layer 12, the openings between each adjustment groove in the inner cavity of the buffer cylinder 9 can be sealed, thereby realizing the rapid closure of the regulating control valve. This can reduce the wear of the sealing structure and reduce the difficulty of opening and closing the inner cavity of the valve body 1.

[0019] In a preferred embodiment, the mounting groove in the middle of the valve body 1 is cylindrical. The mounting groove is connected to the liquid inlet groove and the liquid outlet groove at both ends of the valve body 1. Multiple sets of main sealing strips 17 are fixedly connected at equal intervals along the axial direction at the lower end of the inner side of the mounting groove. At the same time, the multiple sets of main sealing strips 17 are all annular structures, and the axial section of the main sealing strips 17 is semi-circular.

[0020] In this embodiment, as Figure 1 and Figure 4 The inlet and outlet channels of valve body 1 are connected through the mounting slot. The regulating component 2, which is fixedly connected in the mounting slot, can realize the opening and closing of the regulating control valve. At the same time, the setting of the main sealing strip 17 can help enhance the sealing of the connection between the lower end of the regulating component 2 and the mounting slot.

[0021] In a preferred embodiment, the fixed cylinder 16 is cylindrical in shape. The lower end of the outer arc surface of the fixed cylinder 16 is fixedly connected to the main sealing sleeve 14, which is also cylindrical in shape. The surface of the main sealing sleeve 14 abuts against the main sealing strip 17. Buffer grooves are provided in the middle and upper part of the outer side of the fixed cylinder 16, and the buffer grooves are cylindrical in shape.

[0022] In this embodiment, as Figure 1 , Figure 2 and Figure 3The main sealing sleeve 14 can be made of soft rubber, which can enhance the sealing effect when the main sealing sleeve 14 and the main sealing strip 17 come into contact with each other. The opening of the buffer groove allows the liquid inlet at the upper end of the fixed cylinder 16 to be connected to the installation groove through the buffer groove, so that the fluid medium in the installation groove can flow smoothly into the fixed cylinder 16 and the buffer cylinder 9.

[0023] In a preferred embodiment, six sets of liquid inlets are opened at equal intervals around the upper end of the fixed cylinder 16, and a liquid outlet is opened at the bottom of the inner cavity of the fixed cylinder 16. The liquid outlet has a frustum-shaped structure, and the fixed plate 6 has a circular structure. The lower surface of the fixed plate 6 is opened with a fitting groove corresponding to the position of the upper surface of the fixed cylinder 16. At the same time, the upper end of the fixed cylinder 16 is fixedly connected to the fitting groove by bolts.

[0024] In this embodiment, as Figure 2 and Figure 3 The structure of the liquid outlet can help reduce the flow rate of the fluid medium, and the size of the fitting groove and the upper surface of the fixed cylinder 16 are compatible, which can help enhance the stability of the connection between the fixed cylinder 16 and the fixed plate 6, and also facilitate the assembly and disassembly of the various components inside the fixed cylinder 16.

[0025] As a preferred embodiment, the buffer cylinder 9 has an overall cylindrical structure. The outer side of the buffer cylinder 9 is matched with the inner cavity of the fixed cylinder 16. A through-hole is opened at the bottom of the inner cavity of the buffer cylinder 9 relative to the liquid outlet. Six sets of limiting rods 8 are fixedly connected around the upper surface of the buffer cylinder 9 at equal intervals. All six sets of limiting rods 8 have a cylindrical structure, and the upper surface of the limiting rods 8 abuts against the lower surface of the fixed plate 6.

[0026] In this embodiment, as Figure 2 and Figure 3 The outer surface of the buffer cylinder 9 and the inner cavity of the fixed cylinder 16 are matched in size, which helps to enhance the stability of the connection between the two and the sealing of the connection. In addition, the setting of the limiting rod 8 can further enhance the stability of the buffer cylinder 9 inside the fixed cylinder 16 and avoid the problem of accidental shaking of the buffer cylinder 9.

[0027] In a preferred embodiment, the upper surface of the buffer cylinder 9 and the bottom of the liquid inlet are on the same horizontal plane, while the limiting rod 8 and the liquid inlet are staggered. Three sets of partition plates 13 are fixedly connected at equal intervals along the axial direction in the inner cavity of the buffer cylinder 9. All three sets of partition plates 13 have a circular structure. At the same time, the inner cavity of the buffer cylinder 9 is divided into four sets of adjustment grooves by the partition plates 13. The bottom of each adjustment groove is fixedly connected to a secondary sealing strip 15. The secondary sealing strip 15 has a circular structure and a semi-circular cross-section.

[0028] In this embodiment, as Figure 2 and Figure 3The size of the buffer cylinder 9 ensures that the liquid inlet at the top of the fixed cylinder 16 is not blocked, and that the fluid medium flowing in the installation groove can smoothly flow into the inner cavity of the fixed cylinder 16 and the buffer cylinder 9 through the liquid inlet. At the same time, the partition plate 13 allows the inner cavity of the buffer cylinder 9 to be divided into multiple sets of adjustment grooves. Through the cooperation of multiple sets of adjustment grooves, the fluid medium can be buffered and depressurized in multiple stages, which helps to reduce the probability of wear of the sealing structures inside the buffer cylinder 9.

[0029] In a preferred embodiment, four sets of movable rings 10 are fixedly connected at equal intervals at the lower end of the valve stem assembly 4. The four sets of movable rings 10 are slidably connected in four sets of adjusting grooves, and the movable rings 10 have a circular structure. The guide rings 11 fixedly connected to the upper surface of the movable rings 10 have a hollow frustum structure, and the sealing layer 12 fixedly connected to the lower surface of the movable rings 10 has a circular structure. At the same time, an auxiliary groove is opened at the lower end of the valve stem assembly 4 relative to the through opening of the partition plate 13. The axial section of the auxiliary groove has an isosceles trapezoidal structure.

[0030] In this embodiment, as Figure 2 , Figure 3 and Figure 4 The outer diameter of the moving ring 10 is larger than the opening size at the bottom of the corresponding adjustment groove, ensuring that the moving ring 10 can smoothly close the opening of the corresponding adjustment groove after it moves down. The sealing layer 12 can be made of soft rubber, which can further enhance the sealing between the moving ring 10 and the bottom of the adjustment groove. The secondary sealing strip 15 at the bottom of the adjustment groove can abut against and compress the sealing layer 12, thereby further enhancing the sealing effect of the moving ring 10 and the sealing layer 12 in the corresponding adjustment groove. It can also reduce the probability of wear of the sealing structures in the buffer cylinder 9, ensuring that the sealing structures in the buffer cylinder 9 can be opened and closed easily. The setting of the guide ring 11 can reduce the impact effect on the moving ring 10 when the fluid medium flows. At the same time, the opening of the auxiliary groove can help enhance the smoothness and efficiency of the fluid medium flowing between the adjustment grooves in the buffer cylinder 9.

[0031] The multi-stage electric regulating control valve of this utility model, through the cooperation of the fixed plate 6, fixed cylinder 16, buffer cylinder 9, partition plate 13, valve stem assembly 4 and moving ring 10, enables the control valve to perform corresponding multi-stage buffering and pressure reduction on the fluid medium flowing inside it. This not only enhances the sealing effect, but also reduces the processing difficulty and processing cost. It can also help reduce the probability of wear on the sealing structures inside the valve body 1 and extend the service life of each sealing structure.

Claims

1. A multi-stage electrically adjustable control valve, comprising: The regulating assembly (2) is fixedly connected to the valve body (1) through a mounting groove, and the valve cover assembly (3) is fixedly connected to the upper surface of the valve body (1). The upper surface of the valve cover assembly (3) is fixedly connected to the electric rod (5) through a mounting bracket, and the lower end of the valve rod assembly (4) is slidably connected to the regulating assembly (2). The regulating assembly (2) is characterized by being composed of a fixing plate (6), a fixing cylinder (16), and a buffer cylinder (9). The fixing plate (6) is fixedly connected to the upper surface of the fixing cylinder (16) by bolts, and the buffer cylinder (9) is fixedly connected to the inner cavity of the fixing cylinder (16). A partition plate (13) is symmetrically connected to the inner side of the punch (9), and a limiting rod (8) is symmetrically connected to the upper surface of the buffer cylinder (9). The upper end of the limiting rod (8) abuts against the lower surface of the fixing plate (6). At the same time, a through hole is opened in the middle of the fixing plate (6), and a secondary sealing sleeve (7) is fixedly connected in the through hole. The lower end of the valve stem assembly (4) passes through the secondary sealing sleeve (7) and is slidably connected in the buffer cylinder (9). The lower end of the valve stem assembly (4) is fixedly connected to a moving ring (10). A guide ring (11) is fixedly connected to the upper surface of the moving ring (10), and a sealing layer (12) is fixedly connected to the lower surface of the moving ring (10).

2. The multi-stage electric regulating control valve according to claim 1, characterized in that, The mounting groove in the middle of the valve body (1) is cylindrical. The mounting groove is connected to the liquid inlet groove and liquid outlet groove at both ends of the valve body (1). Multiple sets of main sealing strips (17) are fixedly connected at equal intervals along the axial direction at the lower end of the inner side of the mounting groove. At the same time, the multiple sets of main sealing strips (17) are all annular structures, and the axial section of the main sealing strips (17) is semi-circular.

3. The multi-stage electric regulating control valve according to claim 1, characterized in that, The fixed cylinder (16) is cylindrical in shape. The lower end of the outer arc surface of the fixed cylinder (16) is fixedly connected to the main sealing sleeve (14), which is cylindrical in shape. The surface of the main sealing sleeve (14) abuts against the main sealing strip (17). Buffer grooves are opened in the middle and upper part of the outer side of the fixed cylinder (16), and the buffer grooves are cylindrical in shape.

4. A multi-stage electric regulating control valve according to claim 1, characterized in that, The upper end of the fixed cylinder (16) has six sets of liquid inlets at equal intervals around the circumference, and the bottom of the inner cavity of the fixed cylinder (16) has a liquid outlet with a frustum-shaped structure. The fixed plate (6) has a circular structure, and the lower surface of the fixed plate (6) has a corresponding fitting groove relative to the upper surface of the fixed cylinder (16). At the same time, the upper end of the fixed cylinder (16) is fixedly connected to the fitting groove by bolts.

5. A multi-stage electric regulating control valve according to claim 1, characterized in that, The buffer cylinder (9) has a cylindrical structure. The outer side of the buffer cylinder (9) and the inner cavity of the fixed cylinder (16) are matched in size. A through-hole is opened at the bottom of the inner cavity of the buffer cylinder (9) relative to the liquid outlet. Six sets of limiting rods (8) are fixedly connected around the upper surface of the buffer cylinder (9) at equal intervals. All six sets of limiting rods (8) have a cylindrical structure. The upper surface of the limiting rods (8) abuts against the lower surface of the fixed plate (6).

6. A multi-stage electric regulating control valve according to claim 1, characterized in that, The upper surface of the buffer cylinder (9) and the bottom of the liquid inlet are on the same horizontal plane, while the limiting rod (8) and the liquid inlet are staggered. The inner cavity of the buffer cylinder (9) is fixedly connected with three sets of partition plates (13) at equal intervals along the axial direction. All three sets of partition plates (13) are circular ring structures. At the same time, the inner cavity of the buffer cylinder (9) is divided into four sets of adjustment grooves through the partition plates (13). The bottom of each adjustment groove is fixedly connected with a secondary sealing strip (15). The secondary sealing strip (15) is circular ring structure, and the cross section of the secondary sealing strip (15) is semi-circular structure.

7. A multi-stage electric regulating control valve according to claim 1, characterized in that, The lower end of the valve stem assembly (4) is fixedly connected with four sets of moving rings (10) at equal intervals. The four sets of moving rings (10) are slidably connected in four sets of adjusting grooves. The moving rings (10) are circular rings. The guide rings (11) fixedly connected to the upper surface of the moving rings (10) are hollow frustum-shaped structures. The sealing layer (12) fixedly connected to the lower surface of the moving rings (10) is circular ring-shaped. At the same time, an auxiliary groove is opened at the position of the lower end of the valve stem assembly (4) relative to the through-hole of the partition plate (13). The axial section of the auxiliary groove is an isosceles trapezoidal structure.

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