Electric non-rising stem wedge gate valve

Abstract

The utility model relates to the technical field of valves, in particular to an electric non-rising stem wedge gate valve which intercepts fluid through a sealing plate, prevents the fluid from making contact with a screw, reduces corrosion of the screw and prolongs the service life of the gate valve. Comprising a valve shell, an upper shell, a wedge-shaped gate plate and a screw, flanges are arranged at the two ends of the valve shell, the upper shell is arranged above the middle of the valve shell, the upper shell is communicated with the interior of the valve shell, the wedge-shaped gate plate is inserted into the middle of the valve shell in a lifting mode to cut off the valve shell, and the upper end of the screw is rotationally connected with the upper portion of the upper shell; the lower end of the screw rod is rotationally screwed with a threaded hole in the middle of the wedge-shaped flashboard; the sealing plate is installed at the upper end of the wedge-shaped gate plate, the edge of the sealing plate is in sliding contact with the inner wall of the upper shell, the sealing ring is installed on the edge of the sealing plate, and the sealing ring seals a gap between the sealing plate and the inner wall of the upper shell.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an electric non-rising stem wedge gate valve. Background Art

[0002] An electric non-rising stem wedge gate valve is a gate valve driven by a motor to lift a wedge gate plate, mainly used for fluid regulation and throttling. The Chinese utility model patent with the publication number CN220688082U in the prior art proposes an electric non-rising stem gate valve. In the process of using this electric non-rising stem gate valve, through the settings of a fixing plate, a clamping plate, a servo motor, a first flange, a spline, a second flange and a keyway, the servo motor is clamped and connected inside the fixing plate and the clamping plate. The fixing plate and the clamping plate are installed on the valve stem housing, and the fixing plate and the clamping plate are connected by screws and can be disassembled and replaced with the servo motor. The output end of the servo motor drives the first flange to rotate. The first flange is flange-connected to the second flange, and the second flange is connected to the opening and closing valve stem through a spline and a keyway. In this way, the opening and closing valve stem can be driven to rotate by the servo motor to control the opening and closing of the gate valve. Since the servo motor is linked with the opening and closing valve stem through a flange and a key, the connection is more stable, the disassembly and assembly are convenient, and it is easy to maintain and replace. Using the servo motor to control the opening and closing reduces the labor burden.

[0003] However, after the gate plate of the non-rising stem gate valve in the prior art is lifted, the fluid in the pipeline will enter the upper housing of the valve body, causing the fluid to directly contact the screw rod, which is likely to cause corrosion to the screw rod and reduce the service life of the gate valve. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides an electric non-rising stem wedge gate valve that intercepts the fluid through a sealing plate, avoids the contact between the fluid and the screw rod, reduces the corrosion of the screw rod, and improves the service life of the gate valve.

[0005] An electric non-rising stem wedge gate valve of the utility model comprises a valve housing, an upper housing, a wedge gate plate and a screw rod. Flanges are arranged at both ends of the valve housing. The upper housing is arranged above the middle of the valve housing, and the interior of the upper housing is communicated with that of the valve housing. The wedge gate plate is inserted into the middle of the valve housing in a liftable manner to cut off the valve housing. The upper end of the screw rod is rotatably connected to the upper part of the upper housing. The screw rod is driven by an electric motor. The lower end of the screw rod is rotatably screwed into a threaded hole in the middle of the wedge gate plate. It further comprises a sealing plate and a sealing ring. The sealing plate is installed at the upper end of the wedge gate plate. The edge of the sealing plate is in sliding contact with the inner wall of the upper housing. A sealing ring is installed at the edge of the sealing plate to seal the gap between the sealing plate and the inner wall of the upper housing. During operation, fluid is conveyed through the valve housing. When the screw rod rotates, it is in threaded cooperation with the wedge gate plate. When the wedge gate plate descends to cut off the valve housing, the outer surface of the wedge gate plate is rubber-coated, which can improve the sealing performance with the valve housing, thereby intercepting the fluid. When the screw rod rotates in the reverse direction, the wedge gate plate rises to open the valve housing and adjust the distance between the lower end of the wedge gate plate and the inner wall of the bottom of the valve housing, so as to throttle the fluid. During the lifting process of the wedge gate plate, the sealing plate follows the wedge gate plate to rise and fall, so that the sealing plate and the sealing ring cooperate with the inner wall of the upper housing to block the fluid below the sealing plate, preventing the fluid from contacting the screw rod, reducing the corrosion of the screw rod and improving the service life of the gate valve.

[0006] Preferably, it further comprises a bearing seat, an annular plate, a plurality of brush rods, a plurality of cleaning brushes and a plurality of bolts II. The upper housing is of a circular tube type, and the sealing plate is circular. A vertical long keyway parallel to the axis of the screw rod is arranged on the outer wall of the screw rod. The depth of the long keyway is greater than the thread depth of the screw rod. The bearing seat is concentrically installed on the upper end face of the sealing plate. The annular plate is sleeved outside the screw rod and installed on the rotating end of the bearing seat. A protruding key block is arranged on the annular plate, and the key block is slidably connected with the long keyway of the screw rod. The inner ends of the plurality of brush rods are respectively installed on the annular plate through the plurality of bolts II, and cleaning brushes are installed at the outer ends of the plurality of brush rods. The plurality of cleaning brushes scrape the inner wall of the upper housing. The annular plate is rotatably installed on the sealing plate through the bearing seat. When the wedge gate plate and the sealing plate rise to open the valve housing, the long keyway of the screw rod drives the annular plate, the plurality of brush rods and the plurality of cleaning brushes to rotate through the key block, so that the plurality of cleaning brushes scrape the inner wall of the upper housing from bottom to top to remove impurities on the upper housing. When the wedge gate plate and the sealing plate descend to close the valve housing, the long keyway of the screw rod drives the annular plate, the plurality of brush rods and the plurality of cleaning brushes to rotate through the key block, so that the plurality of cleaning brushes scrape the inner wall of the upper housing from top to bottom to remove impurities on the upper housing, thereby reducing the wear of the sealing plate and the sealing ring and improving the service life of the sealing plate and the sealing ring.

[0007] Preferably, it further comprises two flanges and a plurality of bolts I. The upper housing is provided with a bottom part and an upper part. Flanges are installed at the upper end of the bottom part and the lower end of the upper part respectively. The two flanges are screwed and fastened through the plurality of bolts I. By removing the plurality of bolts I, the upper part and the bottom part of the upper housing can be disassembled, which is convenient for overhauling components such as the screw rod, the bearing seat, the plurality of brush rods and the plurality of cleaning brushes.

[0008] Preferably, it further includes a trachea, an air outlet and a plug cover. An opening is provided on the upper shell. The trachea is slidably inserted into the opening of the upper shell. A valve is provided on the trachea. An air outlet is provided on the upper shell, and the air outlet is communicated with the inside of the upper shell. The plug cover is rotationally screwed onto the air outlet; the trachea is connected to an external high-pressure air system. After the wedge gate plate cuts off the valve housing, the plug cover is unscrewed from the air outlet, and high-pressure air is sprayed into the inside of the upper shell through the trachea, so that the high-pressure air blows the impurities scraped off inside the upper shell, and the impurities follow the air flow and are discharged through the air outlet, improving the hygiene inside the upper shell and further extending the service life.

[0009] Preferably, it further includes a wedge-shaped slot, which is provided in the middle of the valve housing, and a wedge-shaped slot matching the wedge gate plate is provided inside the wedge-shaped slot; the wedge-shaped slot guides the slot of the wedge gate plate, improving the stability of the wedge gate plate.

[0010] Preferably, it further includes a cover plate, and the cover plate is installed on the top of the wedge-shaped slot and is connected to the inner wall of the upper shell; when the wedge gate plate descends to cut off the valve housing, the lower end surface of the sealing plate is pressed tightly on the cover plate, avoiding the fluid in the valve housing from generating a large pressure on the lower end surface of the sealing plate, resulting in the failure of the wedge gate plate to cut off, and improving the reliability.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: During operation, the fluid is conveyed through the valve housing. When the screw rotates, it is in threaded cooperation with the wedge gate plate. When the wedge gate plate descends to cut off the valve housing, rubber is coated on the outer surface of the wedge gate plate, which can improve the sealing performance with the valve housing, thereby intercepting the fluid. The screw rotates in the reverse direction, causing the wedge gate plate to rise, opening the valve housing, and adjusting the distance between the lower end of the wedge gate plate and the bottom inner wall of the valve housing, thereby throttling the fluid. During the lifting and lowering process of the wedge gate plate, the sealing plate follows the wedge gate plate to lift and lower, so that the sealing plate and the sealing ring cooperate with the inner wall of the upper shell to block the fluid below the sealing plate, preventing the fluid from contacting the screw, reducing the corrosion of the screw, and extending the service life of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the front sectional structure schematic diagram of the present utility model;

[0013] Figure 2 is the partial sectional structure schematic diagram of the present utility model;

[0014] Figure 3 is the axonometric structure schematic diagram of the present utility model;

[0015] Figure 4 is the structure schematic diagram of structures such as the wedge gate plate, the sealing plate and the sealing ring;

[0016] Figure 5 is the structure schematic diagram of structures such as the wedge-shaped slot and the cover plate;

[0017] Figure 6 It is a structural schematic diagram of structures such as a wedge gate, a screw, a bearing seat, an annular plate, a brush rod, and a cleaning brush;

[0018] Figure 7 It is a structural schematic diagram of structures such as a bearing seat, an annular plate, a brush rod, and a cleaning brush.

[0019] Reference numerals in the drawings: 1. Valve housing; 2. Upper housing; 3. Wedge gate; 4. Screw; 5. Bearing seat; 6. Annular plate; 7. Brush rod; 8. Cleaning brush; 9. Flange; 10. Bolt 1; 11. Bolt 2; 12. Air pipe; 13. Air outlet; 14. Plug; 15. Sealing plate; 16. Sealing ring; 17. Wedge slot; 18. Cover plate. Detailed implementation manners

[0020] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0021] Embodiment 1

[0022] As Figures 1 to 5 shown, an electric non-rising stem wedge gate valve includes a valve housing 1, an upper housing 2, a wedge gate 3, and a screw 4. Flanges are provided at both ends of the valve housing 1. An upper housing 2 is provided above the middle of the valve housing 1, and the upper housing 2 is in communication with the interior of the valve housing 1. The wedge gate 3 is inserted into the middle of the valve housing 1 in a liftable manner to cut off the valve housing 1. The upper end of the screw 4 is rotatably connected to the upper part of the upper housing 2. The screw 4 is driven by a motor. The lower end of the screw 4 is rotatably screwed into a threaded hole in the middle of the wedge gate 3. It further includes a sealing plate 15 and a sealing ring 16. The sealing plate 15 is installed at the upper end of the wedge gate 3. The edge of the sealing plate 15 is in sliding contact with the inner wall of the upper housing 2. A sealing ring 16 is installed at the edge of the sealing plate 15, and the sealing ring 16 seals the gap between the sealing plate 15 and the inner wall of the upper housing 2. It further includes a wedge slot 17. The wedge slot 17 is provided in the middle of the valve housing 1, and a wedge slot matching the wedge gate 3 is provided inside the wedge slot 17. It further includes a cover plate 18. The cover plate 18 is installed at the top of the wedge slot 17, and the cover plate 18 is connected to the inner wall of the upper housing 2.

[0023] During operation, the fluid is conveyed through the valve housing 1. When the screw 4 rotates, it engages with the threads of the wedge gate 3. The wedge slot 17 guides the slot of the wedge gate 3, improving the stability of the wedge gate 3. When the wedge gate 3 descends to cut off the valve housing 1, rubber coating is applied to the outer surface of the wedge gate 3, which can improve the sealing performance with the valve housing 1, thereby intercepting the fluid. When the screw 4 rotates in the reverse direction, the wedge gate 3 rises to open the valve housing 1 and adjust the distance between the lower end of the wedge gate 3 and the bottom inner wall of the valve housing 1, thereby throttling the fluid. During the lifting and lowering process of the wedge gate 3, the sealing plate 15 follows the wedge gate 3 to rise and fall, so that the sealing plate 15 and the sealing ring 16 cooperate with the inner wall of the upper shell 2 to block the fluid below the sealing plate 15, preventing the fluid from contacting the screw 4, reducing the corrosion of the screw 4, and increasing the service life of the gate valve. When the wedge gate 3 descends to cut off the valve housing 1, the lower end face of the sealing plate 15 presses tightly on the cover plate 18, preventing the fluid in the valve housing 1 from exerting a large pressure on the lower end face of the sealing plate 15, resulting in the failure of the wedge gate 3 to cut off, and improving the reliability.

[0024] Embodiment 2

[0025] As Figure 6 and Figure 7 shown, on the basis of Embodiment 1, it further includes a bearing seat 5, an annular plate 6, a plurality of brush rods 7, a plurality of cleaning brushes 8 and a plurality of bolts II 11. The upper shell 2 is in the shape of a circular tube, and the sealing plate 15 is circular. A vertical long keyway parallel to the axis of the screw 4 is provided on the outer wall of the screw 4, and the depth of the long keyway is greater than the thread depth of the screw 4. The bearing seat 5 is concentrically installed on the upper end face of the sealing plate 15. The annular plate 6 is sleeved outside the screw 4 and is installed on the rotating end of the bearing seat 5. A protruding key block is provided on the annular plate 6, and the key block is slidably connected to the long keyway of the screw 4. The inner ends of the plurality of brush rods 7 are respectively installed on the annular plate 6 through a plurality of bolts II 11, and the outer ends of the plurality of brush rods 7 are all installed with cleaning brushes 8, and the plurality of cleaning brushes 8 scrape the inner wall of the upper shell 2; it further includes two flanges 9 and a plurality of bolts I 10. The upper shell 2 is provided with a bottom and an upper part. Flanges 9 are installed at the upper end of the bottom and the lower end of the upper part, and the two flanges 9 are screwed and fastened through a plurality of bolts I 10; it further includes an air pipe 12, an air outlet 13 and a plug 14. An opening is provided on the upper shell 2, the air pipe 12 is slidably inserted into the opening of the upper shell 2, a valve is provided on the air pipe 12, an air outlet 13 is provided on the upper shell 2, the air outlet 13 is communicated with the inside of the upper shell 2, and the plug 14 is rotatably screwed on the air outlet 13.

[0026] The annular plate 6 is rotatably mounted on the sealing plate 15 through a bearing block 5. When the wedge gate 3 and the sealing plate 15 are raised to open the valve housing 1, the long keyway of the screw rod 4 drives the annular plate 6, multiple brush rods 7 and multiple cleaning brushes 8 to rotate through a key block, so that the multiple cleaning brushes 8 scrape the inner wall of the upper housing 2 from bottom to top, removing the impurities on the upper housing 2. When the wedge gate 3 and the sealing plate 15 are lowered to close the valve housing 1, the long keyway of the screw rod 4 drives the annular plate 6, multiple brush rods 7 and multiple cleaning brushes 8 to rotate through a key block, so that the multiple cleaning brushes 8 scrape the inner wall of the upper housing 2 from top to bottom, removing the impurities on the upper housing 2, thereby reducing the wear of the sealing plate 15 and the sealing ring 16 and improving the service life of the sealing plate 15 and the sealing ring 16. The air pipe 12 is connected to an external high-pressure air system. After the wedge gate 3 cuts off the valve housing 1, the plug cover 14 is unscrewed from the air outlet 13, and high-pressure air is sprayed into the interior of the upper housing 2 through the air pipe 12, so that the high-pressure air blows the impurities scraped off in the upper housing 2, and the impurities follow the air flow and are discharged through the air outlet 13, improving the hygiene inside the upper housing 2 and further improving the service life. By removing multiple bolts 10, the upper and bottom parts of the upper housing 2 are disassembled, facilitating the maintenance of components such as the screw rod 4, the bearing block 5, multiple brush rods 7 and multiple cleaning brushes 8.

[0027] Such as Figures 1 to 7As shown in the figure, an electric non-rising stem wedge gate valve of the utility model, during its operation, first, the fluid is conveyed through the valve housing 1. When the screw rod 4 rotates, it is in threaded engagement with the wedge gate plate 3. When the wedge gate plate 3 descends, it cuts off the valve housing 1. Rubber is coated on the outer surface of the wedge gate plate 3, which can improve the sealing performance with the valve housing 1, thereby intercepting the fluid. When the screw rod 4 rotates in the reverse direction, the wedge gate plate 3 rises to open the valve housing 1 and adjust the distance between the lower end of the wedge gate plate 3 and the bottom inner wall of the valve housing 1, thereby throttling the fluid. Then, during the ascending and descending process of the wedge gate plate 3, the sealing plate 15 follows the wedge gate plate 3 to rise and fall, so that the sealing plate 15 and the sealing ring 16 cooperate with the inner wall of the upper housing 2 to block the fluid below the sealing plate 15, preventing the fluid from contacting the screw rod 4 and reducing the corrosion of the screw rod 4. Then, when the wedge gate plate 3 and the sealing plate 15 rise to open the valve housing 1, the long keyway of the screw rod 4 drives the annular plate 6, multiple brush rods 7 and multiple cleaning brushes 8 to rotate through the key block, so that the multiple cleaning brushes 8 scrape the inner wall of the upper housing 2 from bottom to top to remove the impurities on the upper housing 2. When the wedge gate plate 3 and the sealing plate 15 descend to close the valve housing 1, the long keyway of the screw rod 4 drives the annular plate 6, multiple brush rods 7 and multiple cleaning brushes 8 to rotate through the key block, so that the multiple cleaning brushes 8 scrape the inner wall of the upper housing 2 from top to bottom to remove the impurities on the upper housing 2, thereby reducing the wear of the sealing plate 15 and the sealing ring 16 and increasing the service life of the sealing plate 15 and the sealing ring 16. Finally, after the wedge gate plate 3 cuts off the valve housing 1, the plug 14 is unscrewed from the air outlet 13, and high-pressure air is sprayed upward into the interior of the upper housing 2 through the air pipe 12, so that the high-pressure air blows the impurities scraped and brushed in the upper housing 2, and the impurities follow the airflow and are discharged through the air outlet 13, improving the hygiene inside the upper housing 2 and further increasing the service life.

[0028] The main functions achieved by the utility model are as follows:

[0029] 1. Intercept the fluid through the sealing plate 15, prevent the fluid from contacting the screw rod 4, reduce the corrosion of the screw rod 4, and increase the service life of the gate valve;

[0030] 2. Can scrape the inner wall of the upper housing 2, reduce wear, and increase the service life;

[0031] 3. Can blow out dust and impurities, reduce the wear of components by impurities, and increase the service life.

[0032] An electric non-rising stem wedge gate valve of the present utility model has a common mechanical installation method, connection method or setting method, and any implementation that can achieve its beneficial effects can be carried out; the valve housing 1, upper housing 2, wedge gate 3, screw rod 4, bearing seat 5, brush rod 7, cleaning brush 8, flange 9, bolt 1 10, bolt 2 11, air pipe 12, plug 14, and sealing ring 16 of the electric non-rising stem wedge gate valve of the present utility model are purchased on the market. Those skilled in the art only need to install and operate according to the attached instruction manual without the need for creative labor from those skilled in the art.

[0033] All the technical and scientific terms used in this article have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. An electric non-rising stem wedge gate valve, comprising a valve housing (1), an upper housing (2), a wedge gate (3) and a screw rod (4). Flanges are provided at both ends of the valve housing (1). An upper housing (2) is arranged above the middle of the valve housing (1), and the upper housing (2) communicates with the inside of the valve housing (1). The wedge gate (3) is inserted into the middle of the valve housing (1) in a liftable manner to cut off the valve housing (1). The upper end of the screw rod (4) is rotatably connected to the upper part of the upper housing (2), the screw rod (4) is driven by an electric motor, and the lower end of the screw rod (4) is rotatably screwed into a threaded hole in the middle of the wedge gate (3); characterized in that, It also includes a sealing plate (15) and a sealing ring (16). The sealing plate (15) is installed at the upper end of the wedge gate (3). The edge of the sealing plate (15) is in sliding contact with the inner wall of the upper shell (2). A sealing ring (16) is installed on the edge of the sealing plate (15), and the sealing ring (16) seals the gap between the sealing plate (15) and the inner wall of the upper shell (2).

2. The electric non-rising stem wedge gate valve according to claim 1, wherein, It also includes a bearing seat (5), an annular plate (6), a plurality of brush rods (7), a plurality of cleaning brushes (8) and a plurality of bolts II (11). The upper shell (2) is of a circular tube type, and the sealing plate (15) is circular. A vertical long keyway parallel to the axis of the screw rod (4) is provided on the outer wall of the screw rod (4). The depth of the long keyway is greater than the thread depth of the screw rod (4). The bearing seat (5) is concentrically installed on the upper end face of the sealing plate (15). The annular plate (6) is sleeved outside the screw rod (4). The annular plate (6) is installed on the rotating end of the bearing seat (5). A protruding key block is provided on the annular plate (6), and the key block is slidably connected to the long keyway of the screw rod (4). The inner ends of the plurality of brush rods (7) are respectively installed on the annular plate (6) through the plurality of bolts II (11). Cleaning brushes (8) are installed at the outer ends of the plurality of brush rods (7), and the plurality of cleaning brushes (8) scrape the inner wall of the upper shell (2).

3. An electric non-rising stem wedge gate valve according to claim 1, characterized in that, It also includes two flanges (9) and a plurality of bolts I (10). The upper shell (2) is provided with a bottom part and an upper part. Flanges (9) are installed at the upper end of the bottom part and the lower end of the upper part respectively. The two flanges (9) are screwed and fastened through the plurality of bolts I (10).

4. The electric non-rising stem wedge gate valve according to claim 1, characterized in that, It also includes an air pipe (12), an air outlet (13) and a plug (14). An opening is provided on the upper shell (2). The air pipe (12) is slidably inserted into the opening of the upper shell (2). A valve is provided on the air pipe (12). An air outlet (13) is provided on the upper shell (2), and the air outlet (13) is communicated with the inside of the upper shell (2). The plug (14) is rotatably screwed on the air outlet (13).

5. An electric non-rising stem wedge gate valve according to claim 1, characterized in that, It also includes a wedge-shaped slot (17). The wedge-shaped slot (17) is provided in the middle of the valve housing (1), and a wedge-shaped slot matching the wedge gate (3) is provided inside the wedge-shaped slot (17).

6. The electric non-rising stem wedge gate valve according to claim 5, wherein, It also includes a cover plate (18). The cover plate (18) is installed at the top of the wedge-shaped slot (17), and the cover plate (18) is connected to the inner wall of the upper shell (2).

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