Eccentric semi-ball valve

Abstract

The utility model relates to the technical field of eccentric semi-ball valves, and discloses an eccentric semi-ball valve which comprises a valve body, and a valve clack and a scraping plate are rotatably connected in the valve body. According to the eccentric semi-ball valve, the driving bevel gear can drive the upper bevel gear and the lower bevel gear to rotate, at the moment, the upper bevel gear can drive the first transmission shaft to rotate, the lower bevel gear can drive the second transmission shaft to rotate, and the upper bevel gear and the lower bevel gear are opposite in direction, so that the rotation directions of the first transmission shaft and the second transmission shaft are opposite; the first transmission shaft drives the scraping plate to rotate anticlockwise, the second transmission shaft drives the valve clack to rotate clockwise to open the valve, when the valve clack begins to rotate to be opened, the valve clack can scrape off crystals or sediments attached to the valve body, and the scraping plate can scrape off the sediments in the reverse direction. Sediments or crystal substances on the other side can be effectively scraped through the scraper blade, so that excessive accumulation of the sediments in the valve is prevented, and the risks of blockage and flow resistance are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of eccentric semi-ball valves, in particular to an eccentric semi-ball valve. Background Art

[0002] The eccentric semi-ball valve is a relatively new type of ball valve. It has some advantages unique to its structure, such as no friction when opening and closing, the seal is not easy to wear, and the opening and closing torque is small. This can reduce the specifications of the actuator. Equipped with a multi-turn electric actuator, it can achieve regulation and strict shutoff of the medium. It is widely used in petroleum, chemical industry, urban water supply and drainage and other working conditions that require strict shutoff.

[0003] According to a high-temperature resistant eccentric hemispherical valve disclosed in application number 202321226957.9, a limiting structure is added to the turntable so that the turntable has a fixed limit, thereby solving the problem of being difficult to lock after rotation.

[0004] However, the following problems still exist in actual use:

[0005] (1) Since the center of the eccentric hemispherical valve does not coincide with the center axis of the valve seat, the contact point between its surface and the valve seat changes when the valve ball rotates, which enables the valve ball to scrape off crystals or deposits on the valve seat during opening and closing. However, the eccentric hemispherical valve in the above-mentioned literature is deflected at one angle, making it impossible to clean the deposits on the other side.

[0006] (2) Although the eccentric semi-ball valve in the above-mentioned literature can lock the position after the ball valve is rotated, it does not have an anti-misoperation mechanism, which makes the valve susceptible to misoperation or accidental operation, thereby increasing safety risks.

[0007] For this purpose, the utility model launches an eccentric semi-ball valve. Utility Model Content

[0008] In response to the shortcomings of the existing technology, the utility model provides an eccentric hemispherical valve, which has the advantages of being able to scrape sediment inside the valve body in both directions, prevent sediment accumulation, and specify the order of opening the valve, preventing the valve from being opened due to operational errors, thereby improving safety and solving the problems raised in the background technology.

[0009] The utility model provides the following technical solution: an eccentric hemispheric valve, comprising a valve body, wherein the valve body is internally rotatably connected to a valve disc and a scraper, the top of the valve body is fixedly connected to a shell one, and a two-way scraping mechanism is arranged inside the shell one, and the two-way scraping mechanism comprises a transmission shaft one, an upper bevel gear, a transmission shaft two, a lower bevel gear and an active bevel gear, one end of the transmission shaft two passes through the valve body and is fixedly connected to the top of the valve disc, the bottom end of the lower bevel gear is fixedly connected to the other end of the transmission shaft two, one end of the transmission shaft one is rotatably connected to the inner top of the shell one, the other end of the transmission shaft one passes through the transmission shaft two and the valve disc and is fixedly connected to one end of the scraper, the interior of the upper bevel gear is fixedly connected to the surface of the transmission shaft one, one end of the active bevel gear is rotatably connected to an inner wall of one side of the shell one, and the surface of the active bevel gear is meshed with the upper bevel gear and the lower bevel gear.

[0010] Preferably, the top of the shell one is fixedly connected to the shell two, and the interior of the shell two is provided with an anti-misopening mechanism, and the anti-misopening mechanism includes a limiting gear, a moving block, a threaded rod and a tooth groove, one end of the limiting gear is rotatably connected to the top of the shell one, one end of the limiting gear is fixedly connected to one end of the transmission shaft one, the surface of the moving block is slidingly connected to the interior of the shell two, the tooth groove is opened at the bottom of the moving block, the interior of the tooth groove is engaged with the surface of the limiting gear, one end of the threaded rod is fixedly connected to the top of the moving block, and the other end of the threaded rod is located outside the shell two.

[0011] Preferably, a handle plate is rotatably connected to one side surface of the housing, and one end of the handle plate is fixedly connected to one end of the driving bevel gear.

[0012] Preferably, the top of the second shell is connected to a knob, and the inside of the knob is threadedly connected to the surface of the threaded rod. Since the knob and the surface of the threaded rod are threadedly connected, rotating the knob can control the up and down movement of the threaded rod, thereby controlling the up and down movement of the moving block.

[0013] Preferably, both ends of the valve body are fixedly connected with connecting flanges, and a plurality of mounting holes are provided on the surface of the connecting flanges. The valve body can be installed in the pipeline through the mounting holes on the connecting flanges.

[0014] Preferably, a limiting groove is provided inside the second housing, an extension block is fixedly connected to the surface of the moving block, and the surface of the extension block is slidably connected to the inside of the limiting groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This eccentric hemispheric valve is equipped with a two-way scraping mechanism. Clockwise rotation of the handle drives the active bevel gear to rotate. Since the active bevel gear is meshed with the upper bevel gear and the lower bevel gear, the active bevel gear will drive the upper bevel gear and the lower bevel gear to rotate. At this time, the upper bevel gear will drive the transmission shaft 1 to rotate, and the lower bevel gear will drive the transmission shaft 2 to rotate. The upper bevel gear and the lower bevel gear are in opposite directions. Therefore, the rotation directions of the transmission shaft 1 and the transmission shaft 2 are opposite, so that the transmission shaft 1 drives the scraper to rotate counterclockwise, and the transmission shaft 2 drives the valve disc to rotate clockwise to open the valve. When the valve disc starts to rotate open, the eccentric position of the valve disc will cause the contact point between the valve disc and the inner wall of the valve body to move, forming a certain shear force, thereby scraping off crystals or deposits attached to the valve body, and the scraper can scrape off the deposits in the opposite direction. The setting of this structure can effectively scrape off the deposits or crystals on the other side through the presence of the scraper, which helps to prevent excessive accumulation of deposits in the valve and reduce the risk of blockage and flow resistance.

[0017] 2. This eccentric hemispheric valve is provided with an anti-misopening mechanism. When the upper bevel gear rotates, the transmission shaft 1 will also rotate, and the transmission shaft 1 will drive the limit gear to rotate. When the valve is closed, the moving block is located at the bottom of the shell 2. At this time, the inside of the tooth groove and the limit gear are engaged with each other, and the extension blocks at both ends of the moving block are located in the limit groove. At this time, the moving block will limit the rotation of the limit gear, thereby preventing the transmission shaft 1 and the upper bevel gear from rotating. At this time, the handle cannot be rotated to open the valve disc, thereby preventing the valve disc from being opened by mistake. Turning the knob can drive the threaded rod to move upward. At this time, the moving block will move upward under the limiting action of the extension block, thereby moving the tooth groove out of the limit gear. At this time, the handle can be rotated normally. The setting of this structure can prevent the valve from being opened by mistake under accidental or abnormal circumstances, reduce the possibility of misoperation, and ensure that the valve is opened only under correct operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the housing of the present invention;

[0021] Figure 4 Practical Figure 3 Schematic diagram of the enlarged structure of part A.

[0022] In the figure: 1. Valve body; 2. Connecting flange; 3. Mounting hole; 4. Housing 1; 5. Housing 2; 6. Knob; 7. Threaded rod; 8. Handle plate; 9. Valve disc; 10. Scraper; 11. Transmission shaft 1; 12. Upper bevel gear; 13. Limit gear; 14. Transmission shaft 2; 15. Lower bevel gear; 16. Active bevel gear; 17. Moving block; 18. Tooth groove; 19. Limit groove; 20. Extension block; 21. Two-way scraping mechanism; 22. Anti-accidental opening mechanism. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-4, an eccentric hemispheric valve, comprising a valve body 1, the interior of the valve body 1 is rotatably connected to a valve disc 9 and a scraper 10, the top of the valve body 1 is fixedly connected to a shell 4, a two-way scraping mechanism 21 is provided inside the shell 4, the two-way scraping mechanism 21 comprises a transmission shaft 11, an upper bevel gear 12, a transmission shaft 2 14, a lower bevel gear 15 and an active bevel gear 16, one end of the transmission shaft 2 14 passes through the valve body 1 and is fixedly connected to the top of the valve disc 9, the bottom end of the lower bevel gear 15 is fixedly connected to the other end of the transmission shaft 2 14, one end of the transmission shaft 11 is rotatably connected to the inner top of the shell 4, the other end of the transmission shaft 11 passes through the transmission shaft 2 14 and the valve disc 9 and is fixedly connected to one end of the scraper 10, the interior of the upper bevel gear 12 is fixedly connected to the surface of the transmission shaft 11, one end of the active bevel gear 16 is rotatably connected to the inner wall of one side of the shell 4, the surface of the active bevel gear 16 is meshed with the upper bevel gear 12 and the lower bevel gear 15, and the surface of one side of the shell 4 is rotatably connected The handle 8 is connected, and one end of the handle 8 is fixedly connected to one end of the driving bevel gear 16. The handle 8 is rotated clockwise to drive the driving bevel gear 16 to rotate. Since the driving bevel gear 16 is engaged with the upper bevel gear 12 and the lower bevel gear 15, the driving bevel gear 16 will drive the upper bevel gear 12 and the lower bevel gear 15 to rotate. At this time, the upper bevel gear 12 will drive the transmission shaft 11 to rotate, and the lower bevel gear 15 will drive the transmission shaft 2 14 to rotate, and the upper bevel gear 12 and the lower bevel gear 15 are opposite in direction, so the rotation directions of transmission shaft 11 and transmission shaft 2 14 are opposite, so that transmission shaft 11 drives scraper 10 to rotate counterclockwise, and transmission shaft 2 14 drives valve disc 9 to rotate clockwise to open the valve. When the valve disc 9 starts to rotate open, the eccentric position of the valve disc 9 will cause the contact point between the valve disc 9 and the inner wall of the valve body 1 to move, forming a certain shear force, thereby scraping off crystals or sediments attached to the valve body 1, and the scraper 10 can scrape off sediments in the opposite direction.

[0025] See also Figure 3-4The top of the shell 1 4 is fixedly connected to the shell 2 5, and the interior of the shell 2 5 is provided with an anti-misopening mechanism 22, which includes a limit gear 13, a moving block 17, a threaded rod 7 and a tooth groove 18. One end of the limit gear 13 is rotatably connected to the top of the shell 1 4, one end of the limit gear 13 is fixedly connected to one end of the transmission shaft 11, the surface of the moving block 17 is slidably connected to the interior of the shell 2 5, the tooth groove 18 is provided at the bottom of the moving block 17, and the interior of the tooth groove 18 is engaged with the surface of the limit gear 13, one end of the threaded rod 7 is fixedly connected to the top of the moving block 17, the other end of the threaded rod 7 is located outside the shell 2 5, and a limit groove is provided inside the shell 2 5 19. The surface of the moving block 17 is fixedly connected with an extension block 20, and the surface of the extension block 20 is slidably connected to the inside of the limit groove 19. When the upper bevel gear 12 rotates, the transmission shaft 11 will also rotate, and the transmission shaft 11 will drive the limit gear 13 to rotate. When the valve is closed, the moving block 17 is located at the bottom of the shell 2 5. At this time, the inside of the tooth groove 18 and the limit gear 13 are engaged with each other, and the extension blocks 20 at both ends of the moving block 17 are located in the limit groove 19. At this time, the moving block 17 will limit the rotation of the limit gear 13, thereby making the transmission shaft 11 and the upper bevel gear 12 unable to rotate, and at this time, the disk 8 cannot be rotated to open the valve disc 9, thereby preventing the valve disc 9 from being opened by mistake.

[0026] See also Figure 1 The top of the outer shell 5 is rotated to connect the knob 6, the inner part of the knob 6 is threadedly connected to the surface of the threaded rod 7, and the two ends of the valve body 1 are fixedly connected to the connecting flange 2, and the surface of the connecting flange 2 is provided with several mounting holes 3.

[0027] Working principle: when in use, turn the handle 8 clockwise to drive the active bevel gear 16 to rotate. Since the active bevel gear 16 is meshed with the upper bevel gear 12 and the lower bevel gear 15, the active bevel gear 16 will drive the upper bevel gear 12 and the lower bevel gear 15 to rotate. At this time, the upper bevel gear 12 will drive the transmission shaft 11 to rotate, and the lower bevel gear 15 will drive the transmission shaft 2 14 to rotate. The upper bevel gear 12 and the lower bevel gear 15 are in opposite directions, so the rotation directions of the transmission shaft 11 and the transmission shaft 2 14 are opposite, which makes the transmission shaft 11 drive the scraper 10 to rotate counterclockwise, and the transmission shaft 2 14 drives the valve disc 9 to rotate clockwise to open the valve. When the valve disc 9 starts to rotate open, the eccentric position of the valve disc 9 will cause the contact point between the valve disc 9 and the inner wall of the valve body 1 to move. A certain shear force is formed to scrape off the crystals or sediments attached to the valve body 1, and the scraper 10 can scrape off the sediments in the opposite direction. When the valve is closed, the moving block 17 is located at the bottom of the shell 2 5. At this time, the inside of the tooth groove 18 is engaged with the limit gear 13, and the extension blocks 20 at both ends of the moving block 17 are located in the limit groove 19. At this time, the moving block 17 will limit the rotation of the limit gear 13, thereby making the transmission shaft 11 and the upper bevel gear 12 unable to rotate. At this time, the handle 8 cannot be rotated to open the valve disc 9, thereby preventing the valve disc 9 from being opened by mistake. Turning the knob 6 can drive the threaded rod 7 to move upward. At this time, the moving block 17 will move upward under the limiting action of the extension block 20, thereby moving the tooth groove 18 out of the limit gear 13, and the handle 8 can be rotated normally.

[0028] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An eccentric hemispherical valve, characterized by: The invention comprises a valve body (1), wherein the valve body (1) is internally connected to a valve flap (9) and a scraper (10), the top of the valve body (1) is fixedly connected to a housing (4), the housing (4) is provided with a two-way scraping mechanism (21), the two-way scraping mechanism (21) comprises a transmission shaft (11), an upper bevel gear (12), a transmission shaft (14), a lower bevel gear (15) and an active bevel gear (16), one end of the transmission shaft (14) passes through the valve body (1) and is fixedly connected to the top of the valve flap (9), the bottom of the lower bevel gear (15) is fixedly connected to the top of the valve flap (9), and the bottom of the lower bevel gear (15) is fixedly connected to the top of the valve flap (9). The end is fixedly connected to the other end of the transmission shaft 2 (14), one end of the transmission shaft 1 (11) is rotatably connected to the inner top of the housing 1 (4), the other end of the transmission shaft 1 (11) passes through the transmission shaft 2 (14) and the valve disc (9) and is fixedly connected to one end of the scraper (10), the interior of the upper bevel gear (12) is fixedly connected to the surface of the transmission shaft 1 (11), one end of the active bevel gear (16) is rotatably connected to the inner wall of one side of the housing 1 (4), and the surface of the active bevel gear (16) is meshed with the upper bevel gear (12) and the lower bevel gear (15).

2. The eccentric hemispherical valve according to claim 1, characterized in that: The top of the housing 1 (4) is fixedly connected to the housing 2 (5), and the interior of the housing 2 (5) is provided with an anti-misoperational opening mechanism (22), and the anti-misoperational opening mechanism (22) includes a limit gear (13), a moving block (17), a threaded rod (7) and a tooth groove (18), one end of the limit gear (13) is rotatably connected to the top of the housing 1 (4), one end of the limit gear (13) is fixedly connected to one end of the transmission shaft 1 (11), the surface of the moving block (17) is slidably connected to the interior of the housing 2 (5), the tooth groove (18) is provided at the bottom of the moving block (17), the interior of the tooth groove (18) is meshed with the surface of the limit gear (13), one end of the threaded rod (7) is fixedly connected to the top of the moving block (17), and the other end of the threaded rod (7) is located outside the housing 2 (5).

3. The eccentric hemispherical valve according to claim 1, characterized in that: A handle plate (8) is rotatably connected to a surface of one side of the housing (4), and one end of the handle plate (8) is fixedly connected to one end of the driving bevel gear (16).

4. The eccentric hemispherical valve according to claim 2, characterized in that: The top of the second housing (5) is rotatably connected to a knob (6), and the interior of the knob (6) is threadedly connected to the surface of the threaded rod (7).

5. The eccentric hemispherical valve according to claim 1, characterized in that: Both ends of the valve body (1) are fixedly connected with connecting flanges (2), and a plurality of mounting holes (3) are provided on the surface of the connecting flange (2).

6. The eccentric hemispherical valve according to claim 2, characterized in that: A limiting groove (19) is provided inside the second housing (5), an extension block (20) is fixedly connected to the surface of the moving block (17), and the surface of the extension block (20) is slidably connected to the inside of the limiting groove (19).

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