A stop valve with good sealing effect and a method of using the same

Abstract

The application discloses a stop valve with good sealing effect and a use method thereof, which comprises a valve body, a sealing assembly is arranged in the valve body, and flanges are communicated with the front side and the rear side of the valve body. In the rotating process of the bidirectional screw rod, the screw rod pushes the sleeve to move in opposite directions through threads, the sleeve extrudes the transmission plate through the extrusion rod in the moving process, the transmission plate is extruded and drives the connecting block to rotate with the connecting structure as the axis, when the connecting block drives the sealing cover to overturn and is sleeved on the surface of the flange, the effect that the connecting part of the flange is assisted in sealing through two closed sealing covers is achieved, the connecting stability and the sealing effect of the flange are improved, and the problems that the connecting mode of the existing stop valve and the pipeline is single, the flanges are generally directly connected in adhesion, leakage is prone to occurring between the flanges after long-time use, the liquid conveying stability is seriously affected, the internal pressure of the pipeline is reduced, and the surrounding environment is easily polluted are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stop valve, in particular to a stop valve with good sealing effect and a use method thereof. BACKGROUND

[0002] The stop valve is a tool that relies on the pressure of the valve lever to make the sealing surface of the valve disc tightly adhere to the sealing surface of the valve seat to prevent the medium from flowing, belongs to the forced sealing type valve, and is one of the widely used valves. The stop valve is divided into four types according to the direction of the passage, namely straight-through stop valve, straight-flow stop valve, angle stop valve and plunger stop valve.

[0003] The stop valve needs to be connected to the pipeline during use, but the connection mode of the existing stop valve and the pipeline is relatively single, generally directly connected by flanges, and leakage may occur between the flanges after a long time of use, which seriously affects the stability of liquid delivery, reduces the internal pressure of the pipeline, and easily pollutes the surrounding environment.

[0004] Therefore, the stop valve needs to be designed and improved to effectively prevent leakage. SUMMARY

[0005] To solve the problems in the background art, the present application provides a stop valve with good sealing effect and a use method thereof, which has the advantages of improving the sealing effect, and solves the problems of the single connection mode of the existing stop valve and the pipeline, generally directly connected by flanges, leakage between the flanges after a long time of use, which seriously affects the stability of liquid delivery, reduces the internal pressure of the pipeline, and easily pollutes the surrounding environment.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a stop valve with good sealing effect and a use method thereof, comprising a valve body;

[0007] The inside of the valve body is provided with a sealing assembly, the front side and the rear side of the valve body are both communicated with flanges, the front side and the rear side of the sealing assembly are both movably connected with connecting blocks through connecting structures, the bottom of the connecting block is fixedly connected with a sealing cover, the sealing cover is sleeved on the surface of the flange, the inner sides of the sealing covers are in contact with each other, the number of the sealing covers is four and they are symmetrically arranged, the top of the connecting block is fixedly connected with a transmission plate, the front side and the rear side of the top of the valve body are both fixedly connected with connecting frames, the inside of the connecting frame is movably connected with a bidirectional screw rod, the left side and the right side of the surface of the bidirectional screw rod are both screw-connected with a sleeve, the front side of the sleeve is fixedly connected with an extrusion rod inside the transmission plate, the outer side of the extrusion rod is in contact with the surface of the transmission plate, and the right side of the valve body is provided with a structure for driving the bidirectional screw rod to rotate.

[0008] As preferred, the structure for driving the bidirectional screw to rotate comprises a double-shaft motor fixedly connected to the right side of the connecting frame, the right end of the bidirectional screw penetrates through the connecting frame and extends to the right side of the connecting frame, the output end of the double-shaft motor and the right end of the bidirectional screw are both fixedly connected with bevel gears, and the bevel gears are in meshing relationship.

[0009] As preferred, the right side of the connecting frame is fixedly connected with a transmission box, the double-shaft motor and the bevel gears are both located inside the transmission box, and the double-shaft motor is fixedly connected with the transmission box.

[0010] As preferred, the inside of the connecting frame is fixedly connected with a guide rod, the sleeve is sleeved on the surface of the guide rod and is in sliding connection with the guide rod, and the guide rod is located at the bottom of the bidirectional screw.

[0011] As preferred, the bottom of the transmission box is provided with an opening, and the inside of the transmission box is fixedly connected with a filter screen.

[0012] As preferred, the surface of the extrusion rod is sleeved with a sleeve, the outer surface of the sleeve is in contact with the surface of the transmission plate, and the sleeve is in sliding connection with the extrusion rod and the transmission plate respectively.

[0013] As preferred, the connecting structure comprises a bolt arranged outside the connecting block, one end of the bolt close to the connecting block penetrates through the connecting block and the sealing assembly and extends to the inside of the sealing assembly in sequence, and the sealing assembly is in threaded connection with the bolt.

[0014] As preferred, the inner surface of the sealing cover is fixedly connected with a rubber sleeve, the inner surface of the rubber sleeve is in contact with the surface of the flange, and the rubber sleeve is made of silica gel.

[0015] As preferred, the inner side of the transmission plate is fixedly connected with a support plate, one side of the support plate away from the transmission plate is fixedly connected with the surface of the connecting block, and the outer surface of the sleeve can be in contact with the surface of the support plate.

[0016] A stop valve with good sealing effect and a use method thereof, comprising the following steps:

[0017] S1: connecting the valve body with the pipeline through the flange and controlling the opening and closing of the valve body by the sealing assembly;

[0018] S2: When the flange is installed, turn on the dual-shaft motor. The dual-shaft motor drives the helical gear to rotate, and the helical gear drives the two double-headed screws to rotate synchronously. During the rotation, the double-headed screws use the threads to push the threaded sleeves to move towards each other. During the movement, the threaded sleeves use the extrusion rod to press the transmission plate. The transmission plate is compressed and drives the connecting block to rotate around the connecting structure as the axis. When the connecting block drives the sealing cover to flip and fit on the surface of the flange, the effect of using two closed sealing covers to assist in sealing the flange connection is achieved.

[0019] S3: When the sealing cover needs to be opened, the dual-shaft motor is started in reverse. The helical gear drives the bidirectional screw to rotate and push the screw sleeve to reset. During the movement, the screw sleeve squeezes the support plate through the extrusion rod, so that it uses the connecting block to drive the sealing cover to rotate and open and disengage from the flange.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. This invention utilizes a bidirectional screw to drive the threaded sleeves to move towards each other during rotation. As the sleeves move, they compress the transmission plate with a pressing rod. This compression causes the transmission plate to rotate around the connecting structure. When the connecting block causes the sealing cover to flip and fit onto the flange surface, it achieves an auxiliary sealing effect at the flange connection using two closed sealing covers. This improves the connection stability and sealing effect of the flange, solving the problem of existing gate valves and pipelines having a relatively simple connection method, typically involving direct flange bonding. This often leads to leakage between flanges after prolonged use, severely affecting the stability of liquid transport, reducing internal pipeline pressure, and easily causing environmental pollution.

[0022] 2. By setting up a dual-shaft motor and helical gear, the present invention can drive two bidirectional screws to rotate simultaneously, thereby improving the rotation synchronization rate of the bidirectional screws and preventing the sealing covers on both sides from opening and closing at different amplitudes.

[0023] 3. By setting up a transmission box, the present invention can improve the safety of the valve body, reduce the contact area between the dual-shaft motor and the external environment, and prevent users from being injured by structural impacts during operation.

[0024] 4. By setting a guide rod, the present invention can guide the threaded sleeve and prevent the threaded sleeve from tilting during movement. At the same time, it can also provide auxiliary support for the bidirectional screw.

[0025] 5. By setting openings and filters, this invention can improve the heat dissipation of the transmission box, prevent the dual-shaft motor from accumulating heat during operation, and prevent external dust from entering the transmission box.

[0026] 6. By providing a sleeve, the present invention can protect the extrusion rod and reduce the wear caused by the extrusion rod and the transmission plate during contact friction. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic cross-sectional view of the main structure of the present invention;

[0029] Figure 3 This is a schematic front cross-sectional view of a partial structure of the present invention;

[0030] Figure 4 This is a three-dimensional schematic diagram of a partial structure of the present invention;

[0031] Figure 5 This is a schematic diagram of a partial cross-sectional view of the present invention from the right.

[0032] Figure 6 For the present invention Figure 1 Enlarged structural diagram at point A in the middle.

[0033] In the diagram: 1. Valve body; 2. Sealing assembly; 3. Flange; 4. Connecting block; 5. Sealing cover; 6. Transmission plate; 7. Connecting frame; 8. Bidirectional screw; 9. Screw sleeve; 10. Extrusion rod; 11. Dual-shaft motor; 12. Helical gear; 13. Transmission box; 14. Guide rod; 15. Opening; 16. Filter screen; 17. Sleeve; 18. Bolt; 19. Rubber sleeve; 20. Support plate. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1 to 6 As shown, the present invention provides a gate valve with good sealing effect, including valve body 1;

[0036] The inside of the valve body 1 is provided with a sealing assembly 2, the front side and the rear side of the valve body 1 are communicated with flanges 3, the front side and the rear side of the sealing assembly 2 are movably connected with connecting blocks 4 through connecting structures, the bottom of the connecting block 4 is fixedly connected with a sealing cover 5, the sealing cover 5 is sleeved on the surface of the flange 3, the inner sides of the sealing cover 5 are in contact with each other, the number of the sealing cover 5 is four and they are symmetrically arranged, the top of the connecting block 4 is fixedly connected with a transmission plate 6, the front side and the rear side of the top of the valve body 1 are fixedly connected with connecting frames 7, the inside of the connecting frame 7 is movably connected with a bidirectional screw rod 8, the left side and the right side of the surface of the bidirectional screw rod 8 are threadedly connected with screw sleeves 9, the front side of the screw sleeve 9 is fixedly connected with an extrusion rod 10 which is located on the inner side of the transmission plate 6, the outer side of the extrusion rod 10 is in contact with the surface of the transmission plate 6, and the right side of the valve body 1 is provided with a structure for driving the bidirectional screw rod 8 to rotate.

[0037] With reference to Figure 2 , the structure for driving the bidirectional screw rod 8 to rotate comprises a double-shaft motor 11 fixedly connected to the right side of the connecting frame 7, the right end of the bidirectional screw rod 8 penetrates through the connecting frame 7 and extends to the right side of the connecting frame 7, the output end of the double-shaft motor 11 and the right end of the bidirectional screw rod 8 are fixedly connected with bevel gears 12 which are in mesh with each other.

[0038] As a technical optimization scheme of the present application, by arranging the double-shaft motor 11 and the bevel gears 12, two bidirectional screw rods 8 can be driven to rotate simultaneously, the rotation synchronization rate of the bidirectional screw rod 8 is improved, and the phenomenon that the sealing covers 5 on both sides have different opening and closing amplitudes is prevented.

[0039] With reference to Figure 3 , the right side of the connecting frame 7 is fixedly connected with a transmission box 13, the double-shaft motor 11 and the bevel gears 12 are located in the inside of the transmission box 13, and the double-shaft motor 11 is fixedly connected with the transmission box 13.

[0040] As a technical optimization scheme of the present application, by arranging the transmission box 13, the safety of the valve body 1 can be improved, the contact area between the double-shaft motor 11 and the external environment is reduced, and the user is prevented from being injured by the structure in operation.

[0041] With reference to Figure 1 , the inside of the connecting frame 7 is fixedly connected with guide rods 14, the screw sleeves 9 are sleeved on the surface of the guide rods 14 and are in sliding connection with the guide rods 14, and the guide rods 14 are located at the bottom of the bidirectional screw rod 8.

[0042] As a technical optimization scheme of the present application, by arranging the guide rods 14, the screw sleeves 9 can be guided, the phenomenon that the screw sleeves 9 are inclined during movement is prevented, and the bidirectional screw rod 8 can be assisted and supported.

[0043] With reference to Figure 2 , the bottom of the transmission box 13 is provided with an opening 15, and the inside of the transmission box 13 is fixedly connected with a filter screen 16.

[0044] As a technical optimization scheme of the present application, by setting the opening 15 and the filter screen 16, the heat dissipation effect of the transmission box 13 can be improved, preventing the double-shaft motor 11 from accumulating heat during operation, while preventing external dust from entering the inside of the transmission box 13.

[0045] With reference to Figure 1 The surface of the extrusion rod 10 is sleeved with a sleeve 17, the outer surface of the sleeve 17 is in contact with the surface of the transmission plate 6, and the sleeve 17 is in sliding connection with the extrusion rod 10 and the transmission plate 6 respectively.

[0046] As a technical optimization scheme of the present application, by setting the sleeve 17, the extrusion rod 10 can be protected, reducing the wear caused by the contact friction between the extrusion rod 10 and the transmission plate 6.

[0047] With reference to Figure 3 The connecting structure comprises a bolt 18 arranged on the outer side of the connecting block 4, one end of the bolt 18 near the connecting block 4 penetrates the connecting block 4 and the sealing assembly 2 in sequence and extends to the inside of the sealing assembly 2, and the sealing assembly 2 is in threaded connection with the bolt 18.

[0048] As a technical optimization scheme of the present application, by setting the bolt 18, the user can conveniently install the sealing cover 5, improving the connection stability between the sealing cover 5 and the sealing assembly 2.

[0049] With reference to Figure 1 The inner surface of the sealing cover 5 is fixedly connected with a rubber sleeve 19, the inner surface of the rubber sleeve 19 is in contact with the surface of the flange 3, and the rubber sleeve 19 is made of silica gel.

[0050] As a technical optimization scheme of the present application, by setting the rubber sleeve 19, the sealing effect of the sealing cover 5 can be improved, preventing gaps from being generated between the sealing cover 5 and the flange 3, and meeting the installation requirements of flanges 3 of different sizes.

[0051] With reference to Figure 1 The inner side of the transmission plate 6 is fixedly connected with a support plate 20, the side of the support plate 20 away from the transmission plate 6 is fixedly connected with the surface of the connecting block 4, and the outer surface of the sleeve 17 can be in contact with the surface of the support plate 20.

[0052] As a technical optimization scheme of the present application, by setting the support plate 20, the transmission plate 6 can be supported, improving the connection stability between the transmission plate 6 and the connecting block 4, and the transmission plate 6 can be driven to reset by the extrusion rod 10, saving the user's operation steps of opening the sealing cover 5.

[0053] With reference to Figure 1 A use method of the stop valve with good sealing effect, comprising the following steps:

[0054] S1: the valve body 1 is connected with the pipeline through the flange 3, and the opening and closing of the valve body 1 is controlled by the sealing assembly 2;

[0055] S2: when the flange 3 is installed, the double-shaft motor 11 is started, the bevel gear 12 is driven to rotate by the double-shaft motor 11, the two bidirectional screws 8 are synchronously rotated by the bevel gear 12, the screw sleeves 9 are moved towards each other by the bidirectional screws 8 in the rotating process, the transmission plates 6 are extruded by the extrusion rods 10 in the moving process of the screw sleeves 9, the transmission plates 6 are extruded and drive the connecting blocks 4 to rotate around the connecting structure as the axis, when the connecting blocks 4 drive the sealing covers 5 to overturn and be sleeved on the surface of the flange 3, the effect that the connection of the flange 3 is auxiliary sealed by the two closed sealing covers 5 is achieved;

[0056] S3: when the sealing cover 5 needs to be opened, the double-shaft motor 11 is started in reverse, the bidirectional screws 8 are overturned and drive the screw sleeves 9 to reset by the bevel gear 12, the support plates 20 are extruded by the extrusion rods 10 in the moving process of the screw sleeves 9, so that the sealing covers 5 are driven to overturn and open by the connecting blocks 4 and are separated from the flange 3.

[0057] The working principle and use process of the application are as follows: when used, firstly, the valve body 1 is connected with the pipeline through the flange 3, and the opening and closing of the valve body 1 is controlled by the sealing assembly 2, when the flange 3 is installed, the double-shaft motor 11 is started, the bevel gear 12 is driven to rotate by the double-shaft motor 11, the two bidirectional screws 8 are synchronously rotated by the bevel gear 12, the screw sleeves 9 are moved towards each other by the bidirectional screws 8 in the rotating process, the transmission plates 6 are extruded by the extrusion rods 10 in the moving process of the screw sleeves 9, the transmission plates 6 are extruded and drive the connecting blocks 4 to rotate around the connecting structure as the axis, when the connecting blocks 4 drive the sealing covers 5 to overturn and be sleeved on the surface of the flange 3, the effect that the connection of the flange 3 is auxiliary sealed by the two closed sealing covers 5 is achieved, the connection stability and sealing effect of the flange 3 are improved, when the sealing cover 5 needs to be opened, the double-shaft motor 11 is started in reverse, the bidirectional screws 8 are overturned and drive the screw sleeves 9 to reset by the bevel gear 12, the support plates 20 are extruded by the extrusion rods 10 in the moving process of the screw sleeves 9, so that the sealing covers 5 are driven to overturn and open by the connecting blocks 4 and are separated from the flange 3.

[0058] In summary: the sealing effect is good, the stop valve and the use method thereof, through the bidirectional screw rod 8 in the rotation process using the thread to push the sleeve nut 9 to move towards each other, the sleeve nut 9 in the moving process using the extrusion rod 10 extruding the transmission plate 6, the transmission plate 6 is extruded and drives the connecting block 4 to rotate with the connecting structure as the axis, when the connecting block 4 drives the sealing cover 5 to overturn and is sleeved on the surface of the flange 3, the effect of using two closed sealing covers 5 to assist sealing the connection of the flange 3 is achieved, the connection stability and sealing effect of the flange 3 are improved, the problem that the connection mode of the existing stop valve and the pipeline is relatively single, generally directly through the flange 3 to fit and connect, after long-time use, the flanges 3 are prone to leakage, which seriously affects the liquid conveying stability, reduces the internal pressure of the pipeline, and easily causes pollution to the surrounding environment is solved.

[0059] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0060] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous further modifications and changes can be apparent to one skilled in the art without departing from the scope and spirit of the application. The scope of the application is defined by the appended claims and their equivalents.

Claims

1. A globe valve having a tight seal, characterized by: The utility model provides a valve body (1), the inside installation of valve body (1) is sealed assembly (2), the front side and rear side of valve body (1) are all communicated with flange (3), the front and back of sealed assembly (2) are all connected with the connecting block (4) through the connecting structure swing, the bottom fixed connection of connecting block (4) is sealed cover (5), the surface of sealed cover (5) is set in flange (3), the inner side of sealed cover (5) is mutual contact, the number of sealed cover (5) is four and mutually symmetrical arrangement, the top fixed connection of connecting block (4) is transmission plate (6), the front side and rear side of valve body (1) top are all fixedly connected with the connecting frame (7), the inside swing of connecting frame (7) is connected with two -way screw rod (8), the left side and right side of two -way screw rod (8) surface are all screwed with the nipple (9), the front surface fixed connection of nipple (9) is located the extrusion rod (10) in transmission plate (6) inner side, the outer side of extrusion rod (10) and the surface of transmission plate (6) contact, the right side of valve body (1) is provided with the structure for driving two -way screw rod (8) rotation; The structure for driving two -way screw rod (8) rotation includes a double shaft motor (11) fixedly connected to the right side of the connecting frame (7), the right end of the two -way screw rod (8) penetrates through the connecting frame (7) and extends to the right side of the connecting frame (7), the output end of the double shaft motor (11) and the right end of the two -way screw rod (8) are both fixedly connected with a helical gear (12), and the helical gears (12) are meshed with each other. The surface of the extrusion rod (10) is sleeved with a sleeve (17), the outer surface of the sleeve (17) is in contact with the surface of the transmission plate (6), and the sleeve (17) is slidingly connected with the extrusion rod (10) and the transmission plate (6) respectively; the connecting structure includes a bolt (18) arranged on the outer side of the connecting block (4), one end of the bolt (18) close to the connecting block (4) penetrates through the connecting block (4) and the sealing assembly (2) in sequence and extends to the inside of the sealing assembly (2), and the sealing assembly (2) is screwed with the bolt (18); the inner side of the transmission plate (6) is fixedly connected with a support plate (20), one side of the support plate (20) away from the transmission plate (6) is fixedly connected with the surface of the connecting block (4), and the outer surface of the sleeve (17) can be in contact with the surface of the support plate (20).

2. The tight sealing stop valve according to claim 1, characterized in that: The right side of the connecting frame (7) is fixedly connected with a transmission box (13), and the double shaft motor (11) and the helical gear (12) are located in the inside of the transmission box (13).

3. The tight sealing stop valve according to claim 2, characterized in that: The inside of the connecting frame (7) is fixedly connected with a guide rod (14), the sleeve (9) is sleeved on the surface of the guide rod (14) and is slidingly connected with the guide rod (14), and the guide rod (14) is located at the bottom of the two -way screw rod (8).

4. The tight sealing stop valve according to claim 3, characterized in that: The bottom of the transmission box (13) is provided with an opening (15), and the inside of the transmission box (13) is fixedly connected with a filter screen (16).

5. The tight sealing stop valve according to claim 4, characterized in that: The inner surface of the sealing cover (5) is fixedly connected with a rubber sleeve (19), the inner surface of the rubber sleeve (19) is in contact with the surface of the flange (3), and the rubber sleeve (19) is made of silica gel.

6. The method of using a tight sealing stop valve as claimed in claim 4, wherein: The method comprises the following steps: S1: connecting the valve body (1) with the pipeline through the flange (3), and controlling the opening and closing of the valve body (1) by using the sealing assembly (2); S2: when the flange (3) is installed, the double-shaft motor (11) is started, the double-shaft motor (11) drives the bevel gear (12) to rotate, the bevel gear (12) drives the two bidirectional screws (8) to rotate synchronously, the bidirectional screws (8) push the screw sleeves (9) to move towards each other in the rotating process, the screw sleeves (9) extrude the transmission plates (6) by using the extrusion rods (10) in the moving process, the transmission plates (6) are extruded and drive the connecting blocks (4) to rotate around the connecting structure as the axis, when the connecting blocks (4) drive the sealing covers (5) to overturn and be sleeved on the surface of the flange (3), the effect that the connecting part of the flange (3) is auxiliary sealed by the two closed sealing covers (5) is achieved; S3: when the sealing cover (5) needs to be opened, the double-shaft motor (11) is started in reverse, the bevel gear (12) drives the bidirectional screws (8) to overturn and push the screw sleeves (9) to reset, the screw sleeves (9) extrude the support plates (20) by using the extrusion rods (10) in the moving process, so that the sealing covers (5) are overturned and opened by the connecting blocks (4) and are out of contact with the flange (3).

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