Double-seal eccentric-forged ball valve

Abstract

The application discloses a double-sealing eccentric forged ball valve, which comprises a side plate and a handle, a connecting pipe is fixedly installed on the side surface of the side plate, the side plate is symmetrically distributed about the center of the connecting pipe, a stopper is rotationally connected to the inside of the connecting pipe, a lap block is fixedly installed on the side surface of the connecting shaft, and a connecting plate is fixedly installed on the lower surface of the lap block. In the initial stage, the clamping block is located in the first clamping groove, and the stopper normally works. When the device needs to be closed, the connecting block is pulled first, the connecting block drives the clamping block to move out of the first clamping groove through the pull rope, then the staff can rotate the handle, the sliding block slides in the sliding groove, when the clamping block moves to the position of the second clamping groove, the clamping block enters the inside of the second clamping groove under the mutual magnetic force of the second magnet and the third magnet, at this time, the stopper has been rotated by 90 degrees, so that the device stops working.

Description

Technical Field

[0001] This invention relates to the field of eccentric forged ball valve technology, specifically a double-sealed eccentric forged ball valve. Background Technology

[0002] Eccentric forged ball valves are a relatively new type of valve. They have the advantages of frictionless opening and closing and low wear resistance. At the same time, they also have the advantages of low starting torque and tight shut-off. They are widely used in industries such as petroleum, chemical, power and metallurgy.

[0003] For example, in an eccentric ball valve disclosed in CN107606214A, the rotation center line of the valve stem is eccentrically set with respect to the spherical center line of the valve core, and is coplanar and perpendicular to the flow channel center line. When the valve core and the valve seat are in the closed state, a sealing surface is formed between the contacting surfaces of the valve core and the valve seat, and the center line of the sealing surface is eccentrically set with respect to the flow channel center line. By transferring the eccentricity of the flow channel center line and the valve stem rotation center line in the prior art to the eccentricity of the sealing surface center line and the flow channel center line, when processing the eccentric ball valve, it is not necessary to perform eccentric treatment on the valve cover and valve body on the vertical axis; only the sealing surface needs to be eccentrically treated. This reduces the processing difficulty and accuracy of the eccentric ball valve, and lowers the manufacturing cost. During assembly, the valve stem and valve core are more easily installed in the flow channel, ensuring the sealing performance between the valve core and the valve seat.

[0004] For example, a ball valve with publication number CN2337366Y overcomes the shortcomings of existing eccentric butterfly valves and fixed ball valves, such as high flow resistance coefficient and short service life. This invention includes a valve body 1, a valve stem 2, a valve core 3, a valve seat 4, a spring 5, and an adjusting plug 6. The valve seat 4 has a shoulder 9, and the spring 5 is located on both sides of the shoulder 9. The sealing surface of the valve core 3 is a spherical surface 19, which is part of a ball. The spherical surface 19 of the valve core 3 contacts the end of the valve seat 4 extending into the valve body cavity 10. The line of symmetry of the spherical surface 19 of the valve core 3 has an eccentricity with the axis of the valve stem 2. This invention has a low flow resistance coefficient and a long service life.

[0005] The device described in the above application only has the most basic sealing function when in use, and does not have a secondary sealing or double sealing structure. After long-term use, the medium may leak due to wear and tear of the workpiece, which will affect the transportation of the medium and cause unnecessary trouble.

[0006] To address the aforementioned issues, there is an urgent need for innovative design based on the existing eccentric forged ball valve. Summary of the Invention

[0007] The purpose of this invention is to provide a double-sealed eccentric forged ball valve to solve the problem mentioned in the background art that, due to the lack of a secondary seal and double seal structure, media leakage may occur after long-term use due to workpiece wear, which will affect the transportation of media and bring unnecessary trouble.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a double-sealed eccentric forged ball valve, comprising a side plate and a handle, wherein a connecting pipe is fixedly installed on the side of the side plate, and the side plate is symmetrically distributed about the center of the connecting pipe, and a stop block is rotatably connected inside the connecting pipe, and a long pin is fixedly connected to the upper surface of the stop block, and the stop block is a through structure.

[0009] The handle is fixedly installed at the end of the long pin, and the long pin passes through the interior of the connecting tube;

[0010] A double-sealed eccentric forged ball valve further includes:

[0011] The slider is fixedly installed on the side of the long pin and slidably disposed inside the connecting tube. A locking block is slidably connected inside the slider, and a third magnet is fixedly installed on the inner wall of the connecting tube.

[0012] A pull rope, which is fixedly connected to the side of the locking block;

[0013] A water supply pipe is fixedly installed on the side of the side plate, and a fixing block is fixedly installed on the inner wall of the water supply pipe, and a connecting shaft is rotatably connected inside the fixing block;

[0014] An overlapping block is fixedly installed on the side of the connecting shaft, and a connecting plate is fixedly installed on the lower surface of the overlapping block.

[0015] Preferably, the connecting pipe has a first slot corresponding to the card block inside, and a second magnet is fixedly installed inside the card block. The card blocks are symmetrically distributed about the center of the long pin. Initially, under the mutual magnetic attraction of the first magnet and the second magnet, the card block is stably located inside the first slot. At this time, the block will not block the water supply pipes on the left and right sides, so that the device can work normally.

[0016] Preferably, a first magnet corresponding to the second magnet is fixedly installed on the inner wall of the connecting tube, and the magnetic poles of the first magnet and the second magnet are opposite at adjacent positions. The connecting tube has a groove corresponding to the slider inside. When the ball valve needs to be closed, the pull rope is pulled first, so that the pull rope drives the locking block to move out of the first locking groove. At this time, the handle and the long pin can be rotated.

[0017] Preferably, the connecting pipe has a second slot corresponding to the locking block inside, and the rotation angle of the locking block is 0° to 90°. The magnetic poles of the second magnet and the third magnet are opposite at adjacent positions. When the long pin is rotated, the long pin drives the slider to slide inside the groove. The slider and the groove limit the rotation angle of the long pin. After the slider rotates 90°, the locking block and the second slot are in the same vertical direction. At this time, the locking block enters the second slot under the mutual magnetic attraction of the second magnet and the third magnet. At this time, the stop block and the long pin are stably stopped inside the connecting pipe under the action of the locking block and the second slot. That is, the water supply pipes on the left and right sides are no longer connected, which plays a role in cutting off the connection.

[0018] Preferably, the end of the pull rope is located outside the handle, and a connecting block is fixedly connected to the end of the pull rope. When the worker needs to pull the pull rope, he can pull the connecting block.

[0019] Preferably, a connecting disc is rotatably connected to the inner wall of the water supply pipe, and a first steel wire rope is fixedly connected to the surface of the long pin, with the other side of the first steel wire rope wound and fixedly connected to the surface of the connecting disc. When the operator rotates the handle and the long pin, the long pin drives the connecting disc to rotate through the first steel wire rope.

[0020] Preferably, the diameter of the connecting disc is the same as the diameter of the long pin, and a rotating shaft is fixedly installed on the surface of the connecting disc, and a second steel wire rope is fixedly connected to the surface of the rotating shaft. The long pin rotates at an angle of 90°, and since the diameter of the connecting disc is the same as the diameter of the long pin, the rotating angle of the connecting disc is also 90°. The rotating shaft and the connecting disc are fixedly connected, so the rotating angle of the rotating shaft is also 90°.

[0021] Preferably, the other side of the second steel wire rope is wound and fixedly connected to the surface of the connecting shaft, and the diameter of the connecting shaft is the same as the diameter of the rotating shaft. Protrusions are fixedly installed on both the upper and lower sides of the connecting shaft. Because the diameter of the connecting shaft is the same as the diameter of the rotating shaft, when the rotating shaft rotates 90°, the rotating shaft will drive the connecting shaft to rotate 90° through the second steel wire rope. When the connecting shaft rotates 90°, it will drive the connecting plate to rotate 90° through the overlapping block. At this time, the connecting plate and the fixing block cooperate to cut off the water supply pipe, and finally achieve the purpose of secondary sealing, thus optimizing the cut-off effect.

[0022] Preferably, a torsion spring with an elastic reset function is fixedly installed on the surface of the protrusion, and the other side of the torsion spring is fixedly connected to the inner wall of the fixed block. When the connecting shaft rotates, the connecting shaft will stretch the torsion spring through the protrusion. When the operator needs to reopen the ball valve, the connecting block is pulled first. At this time, the connecting block pulls the locking block out of the second locking groove through the pull rope. After rotating the long pin 90° in the opposite direction, the locking block will be in the same horizontal direction as the first locking groove. At this time, the locking block enters the first locking groove under the action of the first magnet and the second magnet. At this time, the connecting plate loses the tension of the first steel wire rope, and the rotating shaft and the second steel wire rope no longer pull the connecting shaft. At this time, the connecting shaft rotates under the action of the torsion spring and the protrusion, that is, the connecting shaft drives the overlapping block and the connecting plate to rotate. At this time, the water supply pipe is no longer cut off, and the ball valve starts to work normally.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: This double-sealed eccentric forged ball valve adopts a novel structural design, the specific details of which are as follows:

[0024] (1) In the initial stage, the locking block of the double-sealed eccentric forged ball valve is located in the first slot. At this time, the stop block works normally. When it is necessary to close the device, first pull the connecting block so that the connecting block moves the locking block out of the first slot through the pull rope. Then the operator can rotate the handle. At this time, the slider slides inside the slide groove. When the locking block moves to the position of the second slot, the locking block enters the interior of the second slot under the mutual attraction of the second magnet and the third magnet. At this time, the stop block has been rotated 90° so that the device no longer works.

[0025] (2) In this double-sealed eccentric forged ball valve, when the long pin rotates, the long pin drives the connecting plate to rotate through the first steel wire rope. The diameter of the connecting plate is the same as the diameter of the long pin, so the rotation angle of the connecting plate is also 90°. The rotating shaft and the connecting plate are fixedly connected, so the rotation angle of the rotating shaft is also 90°. Since the diameter of the connecting shaft is the same as the diameter of the rotating shaft, when the rotating shaft rotates 90°, the rotating shaft will drive the connecting shaft to rotate 90° through the second steel wire rope. When the connecting shaft rotates 90°, it will drive the connecting plate to rotate 90° through the overlapping block. At this time, the connecting plate and the fixed block cooperate to shut off the water supply pipe, and finally achieve the purpose of secondary sealing, thus optimizing the shut-off effect.

[0026] (3) When the double-sealed eccentric forged ball valve needs to be opened, the connecting block is pulled first. At this time, the connecting block pulls the locking block out of the second locking groove through the pull rope. After rotating the long pin 90° in the opposite direction, the locking block will be in the same horizontal direction as the first locking groove. At this time, the locking block enters the first locking groove under the action of the first magnet and the second magnet. At this time, the connecting plate loses the tension of the first wire rope, and the rotating shaft and the second wire rope no longer pull the connecting shaft. At this time, the connecting shaft rotates under the action of the torsion spring and the protrusion. That is, the connecting shaft drives the overlapping block and the connecting plate to rotate. At this time, the water supply pipe is no longer cut off, and the ball valve starts to work normally. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the front sectional view of the present invention;

[0028] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0029] Figure 3 This is a schematic diagram of the connection structure between the long pin and the slider of the present invention;

[0030] Figure 4 For the present invention Figure 1 Enlarged structural diagram at point B;

[0031] Figure 5 This is a schematic diagram of the connection structure between the connecting disk and the rotating shaft of the present invention;

[0032] Figure 6 This is a schematic diagram of the connection structure between the water supply pipe and the fixing block of the present invention;

[0033] Figure 7 This is a front sectional view of the connecting plate of the present invention in its working state;

[0034] Figure 8 For the present invention Figure 6 Enlarged structural diagram at point C.

[0035] In the diagram: 1. Side plate; 2. Connecting pipe; 3. Long pin; 4. First magnet; 5. Slider; 6. Locking block; 7. Slide groove; 8. Second magnet; 9. Stop block; 10. Pull rope; 11. First slot; 12. Second slot; 13. Third magnet; 14. Connecting block; 15. Handle; 16. Water supply pipe; 17. Fixing block; 18. First wire rope; 19. Connecting shaft; 20. Overlapping block; 21. Connecting disc; 22. Rotating shaft; 23. Second wire rope; 24. Connecting plate; 25. Protrusion; 26. Torsion spring. Detailed Implementation

[0036] 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.

[0037] Please see Figure 1-8 The present invention provides a technical solution: a double-sealed eccentric forged ball valve, including a side plate 1 and a handle 15. A connecting pipe 2 is fixedly installed on the side of the side plate 1, and the side plate 1 is symmetrically distributed about the center of the connecting pipe 2. A stop 9 is rotatably connected inside the connecting pipe 2, and a long pin 3 is fixedly connected to the upper surface of the stop 9. The stop 9 is a through structure.

[0038] The handle 15 is fixedly installed at the end of the long pin 3, and the long pin 3 passes through the inside of the connecting tube 2;

[0039] A double-sealed eccentric forged ball valve further includes:

[0040] The slider 5 is fixedly installed on the side of the long pin 3 and is slidably disposed inside the connecting tube 2. The slider 5 is slidably connected to the inside of the locking block 6, and a third magnet 13 is fixedly installed on the inner wall of the connecting tube 2.

[0041] Pull rope 10 is fixedly connected to the side of the locking block 6;

[0042] Water supply pipe 16 is fixedly installed on the side of side plate 1, and a fixing block 17 is fixedly installed on the inner wall of water supply pipe 16, and a connecting shaft 19 is rotatably connected inside the fixing block 17.

[0043] The overlapping block 20 is fixedly installed on the side of the connecting shaft 19, and the lower surface of the overlapping block 20 is fixedly installed with the connecting plate 24.

[0044] The connecting tube 2 has a first slot 11 corresponding to the card block 6 inside, and a second magnet 8 is fixedly installed inside the card block 6. The card blocks 6 are symmetrically distributed about the center of the long pin 3.

[0045] The inner wall of the connecting tube 2 is fixedly installed with a first magnet 4 that corresponds one-to-one with the second magnet 8, and the magnetic poles of the first magnet 4 and the second magnet 8 are opposite at adjacent positions. The connecting tube 2 is also provided with a groove 7 that corresponds to the slider 5.

[0046] The connecting tube 2 has a second slot 12 corresponding to the card block 6 inside, and the rotation angle of the card block 6 is 0° to 90°. The magnetic poles of the second magnet 8 and the third magnet 13 are opposite at adjacent positions.

[0047] The end of the pull rope 10 is located outside the handle 15, and the end of the pull rope 10 is fixedly connected to the connecting block 14.

[0048] Initially, under the mutual magnetic attraction of the first magnet 4 and the second magnet 8, the locking block 6 is stably located inside the first slot 11. At this time, the stop block 9 will not block the side plate 1 and the water supply pipes 16 on both sides of the side plate 1, allowing the device to work normally. When it is necessary to close the ball valve, first pull the pull rope 10 through the connecting block 14, so that the pull rope 10 drives the locking block 6 out of the first slot 11. At this time, the handle 15 and the long pin 3 can be rotated. When the long pin 3 is rotated, the long pin 3 drives the slider 5 to slide inside the slide groove 7. The slider 5 and the slide groove 7 limit the rotation angle of the long pin 3. After the slider 5 rotates 90°, the locking block 6 and the second slot 12 are in the same vertical direction. At this time, under the mutual magnetic attraction of the second magnet 8 and the third magnet 13, the locking block 6 enters the second slot 12. At this time, the stop block 9 and the long pin 3 are stably stopped inside the connecting pipe 2 under the action of the locking block 6 and the second slot 12. That is, at this time, the water supply pipes 16 on both sides are no longer connected, which plays a role in shutting off the connection.

[0049] A connecting disc 21 is rotatably connected to the inner wall of the water supply pipe 16. A first steel wire rope 18 is fixedly connected to the surface of the long pin 3, and the other side of the first steel wire rope 18 is wound and fixedly connected to the surface of the connecting disc 21.

[0050] The diameter of the connecting disc 21 is the same as the diameter of the long pin 3, and a rotating shaft 22 is fixedly installed on the surface of the connecting disc 21, and a second steel wire rope 23 is fixedly connected to the surface of the rotating shaft 22.

[0051] The other side of the second wire rope 23 is wound and fixedly connected to the surface of the connecting shaft 19, and the diameter of the connecting shaft 19 is the same as the diameter of the rotating shaft 22. Protrusions 25 are fixedly installed on both the upper and lower sides of the connecting shaft 19.

[0052] When the operator rotates handle 15 and long pin 3, long pin 3 drives connecting plate 21 to rotate via first steel wire rope 18. The diameter of connecting plate 21 is the same as the diameter of long pin 3. Since long pin 3 rotates at an angle of 90°, connecting plate 21 also rotates at an angle of 90°. Since shaft 22 and connecting plate 21 are fixedly connected, shaft 22 also rotates at an angle of 90°. Because the diameter of connecting shaft 19 is the same as the diameter of shaft 22, when shaft 22 rotates 90°, it drives connecting shaft 19 to rotate 90° via second steel wire rope 23. When connecting shaft 19 rotates 90°, it drives connecting plate 24 to rotate 90° via overlapping block 20. At this time, connecting plate 24 and fixing block 17 cooperate to cut off water supply pipe 16, ultimately achieving secondary sealing and optimizing the cut-off effect.

[0053] A torsion spring 26, which plays an elastic reset role, is fixedly installed on the surface of the protrusion 25, and the other side of the torsion spring 26 is fixedly connected to the inner wall of the fixing block 17.

[0054] When the connecting shaft 19 rotates, it stretches the torsion spring 26 through the protrusion 25. When the operator needs to reopen the ball valve, the connecting block 14 is pulled first. At this time, the connecting block 14 pulls the locking block 6 out of the second locking groove 12 through the pull rope 10. At this time, the long pin 3 can be rotated in the opposite direction, and the slider 5 will slide inside the sliding groove 7 again. After rotating the long pin 3 in the opposite direction by 90°, the locking block 6 will be in the same horizontal direction as the first locking groove 11. At this time, under the action of the first magnet 4 and the second magnet 8, the locking block 6 re-enters the first locking groove 11 (at this time, the long pin 3 is stably stopped inside the connecting pipe 2). At this time, the connecting plate 21 loses the tension of the first steel wire rope 18, and the rotating shaft 22 and the second steel wire rope 23 no longer pull the connecting shaft 19. At this time, the connecting shaft 19 rotates under the action of the torsion spring 26 and the protrusion 25. That is, the connecting shaft 19 drives the overlapping block 20 and the connecting plate 24 to rotate. At this time, the water supply pipe 16 is no longer cut off, and the ball valve starts to work normally.

[0055] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0056] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0058] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-sealed eccentric forged ball valve, comprising a side plate (1) and a handle (15), wherein a connecting pipe (2) is fixedly installed on the side of the side plate (1), and the side plate (1) is symmetrically distributed about the center of the connecting pipe (2), and a stop (9) is rotatably connected inside the connecting pipe (2), and a long pin (3) is fixedly connected to the upper surface of the stop (9), and the stop (9) is a through structure; The handle (15) is fixedly installed at the end of the long pin (3), and the long pin (3) passes through the interior of the connecting tube (2); Its features are, Also includes: The slider (5) is fixedly installed on the side of the long pin (3), and the slider (5) is slidably disposed inside the connecting tube (2). A locking block (6) is slidably connected inside the slider (5), and a third magnet (13) is fixedly installed on the inner wall of the connecting tube (2). A pull rope (10) is fixedly connected to the side of the locking block (6); Water supply pipe (16), the water supply pipe (16) is fixedly installed on the side of the side plate (1), and a fixing block (17) is fixedly installed on the inner wall of the water supply pipe (16), and a connecting shaft (19) is rotatably connected inside the fixing block (17). Overlap block (20), the overlap block (20) is fixedly installed on the side of the connecting shaft (19), and a connecting plate (24) is fixedly installed on the lower surface of the overlap block (20). The connecting pipe (2) has a first slot (11) corresponding to the card block (6) inside, and a second magnet (8) is fixedly installed inside the card block (6), and the card blocks (6) are symmetrically distributed about the center of the long pin (3); The inner wall of the connecting tube (2) is fixedly installed with a first magnet (4) corresponding to the second magnet (8), and the magnetic poles of the first magnet (4) and the second magnet (8) are opposite at adjacent positions. The connecting tube (2) is provided with a groove (7) corresponding to the slider (5). The connecting tube (2) is provided with a second slot (12) corresponding to the card block (6), and the rotation angle of the card block (6) is 0°~90°. The magnetic poles of the second magnet (8) and the third magnet (13) are opposite at adjacent positions.

2. The double-sealed eccentric forged ball valve according to claim 1, characterized in that: The end of the pull rope (10) is located outside the handle (15), and the end of the pull rope (10) is fixedly connected to a connecting block (14).

3. The double-sealed eccentric forged ball valve according to claim 1, characterized in that: A connecting disc (21) is rotatably connected to the inner wall of the water supply pipe (16), and a first steel wire rope (18) is fixedly connected to the surface of the long pin (3), and the other side of the first steel wire rope (18) is wound and fixedly connected to the surface of the connecting disc (21).

4. A double-sealed eccentric forged ball valve according to claim 3, characterized in that: The diameter of the connecting disc (21) is the same as the diameter of the long pin (3), and a rotating shaft (22) is fixedly installed on the surface of the connecting disc (21), and a second steel wire rope (23) is fixedly connected to the surface of the rotating shaft (22).

5. A double-sealed eccentric forged ball valve according to claim 4, characterized in that: The other side of the second wire rope (23) is wound and fixedly connected to the surface of the connecting shaft (19), and the diameter of the connecting shaft (19) is the same as the diameter of the rotating shaft (22), and protrusions (25) are fixedly installed on both the upper and lower sides of the connecting shaft (19).

6. A double-sealed eccentric forged ball valve according to claim 5, characterized in that: A torsion spring (26) that provides elastic reset is fixedly installed on the surface of the protrusion (25), and the other side of the torsion spring (26) is fixedly connected to the inner wall of the fixing block (17).

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