Eccentric semi-ball valve with seal capable of being rapidly replaced

Abstract

An eccentric semi-ball valve with a seal capable of being rapidly replaced comprises a three-way valve body, a first flow channel, a second flow channel and a third flow channel are arranged on the three-way valve body, mounting holes are correspondingly formed in the top faces and the bottom faces of the first flow channel and the second flow channel respectively, a first valve shaft is rotatably mounted in the mounting hole of the first flow channel, and a first valve shaft rotating arm is mounted at the bottom end of the first valve shaft; a second valve shaft is rotatably mounted in a mounting hole of the second runner, eccentric valve plates are correspondingly mounted on the first valve shaft and the second valve shaft, a second valve shaft rotating arm is mounted at the bottom end of the second valve shaft, and an actuator is mounted at the top end of the second valve shaft; the second valve shaft rotating arm and the first valve shaft rotating arm are connected with a connecting rod; inlets of the first flow channel and the second flow channel respectively pass through the pressure plate and the valve seat; an access hole is formed in the top of the three-way valve body, and a sealing gasket and an access cover are installed on the access hole. The valve plates are arranged at the two outlets of the three-way eccentric semi-ball valve respectively, linkage control is achieved through the connecting rod, opening is flexible, the overhaul opening is formed in the valve body, and overhaul is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an eccentric semi-spherical valve with a replaceable seal quickly. Background Technique

[0002] Eccentric semi-spherical valve, foreign name: Eccentric hemispherical valve ; The eccentric semi-spherical valve is a relatively new type of ball valve category. It has some unique advantages in its own structure, such as no friction during opening and closing, the seal is not easily worn, and the opening and closing torque is small. This can reduce the specification of the matching actuator. With a multi-turn electric actuator, the regulation and strict cut-off of the medium can be realized. It is widely applicable to working conditions with strict cut-off requirements such as petroleum, chemical industry, and urban water supply and drainage. The eccentric semi-spherical valve makes the valve unblocked or blocked by rotating the valve shaft; the ball valve is easy to operate, small in size, can be made into a very large diameter, has reliable sealing, simple structure, convenient maintenance, and the sealing surface and the spherical surface are often in a closed state and are not easily eroded by the medium, and is widely used in various industries.

[0003] Due to the above advantages of the eccentric semi-spherical valve, it is also widely installed and used on the sugar juice and steam pipelines of the evaporation tank in the sugar industry. However, through applied research, it is found that when the eccentric semi-spherical valve installed on the steam pipeline of the sugar factory evaporation tank is used to change the steam direction, two eccentric semi-spherical valves need to be installed. The opening is not flexible enough, it cannot quickly close one end while opening the other end, and the valve needs to be disassembled from the steam pipeline to replace the sealing material, and the maintenance is inconvenient. Therefore, it is necessary to design a three-way eccentric semi-spherical valve with flexible opening and the sealing material can be quickly replaced without disassembling the valve. Summary of the Invention

[0004] The purpose of the utility model is to provide an eccentric semi-spherical valve with a replaceable seal quickly. The structure of the eccentric semi-spherical valve with a replaceable seal quickly is ingeniously arranged. Valve plates are respectively arranged at two outlets, and are controlled by linkage through a connecting rod. One actuator is adopted to realize the simultaneous control of two outlets. The opening is flexible, and a maintenance port is arranged on the valve body, which is convenient for maintenance and can quickly replace the sealing material.

[0005] The utility model adopts the following technical solutions:

[0006] An eccentric semi-spherical valve with quickly replaceable seals, comprising a three-way valve body. The three-way valve body is provided with a first flow channel, a second flow channel and a third flow channel. The positions of the first flow channel and the second flow channel on the three-way valve body are arranged in an L shape. Installation holes are respectively provided corresponding to the top and bottom surfaces of the first flow channel and the second flow channel. A first valve shaft is rotatably installed through the installation assembly of the first valve shaft in the installation hole of the first flow channel. An eccentric valve plate is installed on the first valve shaft located in the first flow channel. The bottom end of the first valve shaft located outside the first flow channel is provided with a first valve shaft rotating arm; a second valve shaft is rotatably installed through the installation assembly of the second valve shaft in the installation hole of the second flow channel. An eccentric valve plate is also installed on the second valve shaft located in the second flow channel. The bottom end of the second valve shaft located outside the second flow channel is provided with a second valve shaft rotating arm. The top end of the second valve shaft located outside the second flow channel is provided with an actuator for driving the rotation of the second valve shaft. The actuator is an actuator for normal valve pressure and is commercially available for installation and use; the installation assemblies of the first valve shaft and the second valve shaft are common parts for valve shaft installation. Refer to a special chemical eccentric ball valve with the application number 202121323678.5. A connecting rod is connected between the second valve shaft rotating arm and the first valve shaft rotating arm; valve seats for cooperating with the eccentric valve plate for sealing are respectively installed by being pressed tightly through gland plates at the inlets of the first flow channel and the second flow channel; a maintenance port is provided at the top of the three-way valve body near the third flow channel end, and a gasket and a maintenance cover are installed on the maintenance port. The valve body should be made of high-quality carbon steel or stainless steel materials, having good corrosion resistance and mechanical strength. The valve seat and the sealing ring should have good sealing performance and a long service life. The actuator is an electric actuator, which can realize remote or automatic control, the operating torque is adjustable, and it has a manual operation function. Under normal working conditions, the leakage rate of the three-way valve should meet the requirements of relevant standards. The three-way valve needs to undergo a series of inspections and tests before leaving the factory, including sealing performance tests, operating performance tests and overload protection function tests, etc.

[0007] Further preferably: The installation assembly of the first valve shaft includes a first valve shaft gland and a valve shaft lower bracket. The first valve shaft gland is respectively installed in the installation holes on the top and bottom surfaces of the first flow channel. The first valve shaft is installed through the two first valve shaft glands. A bearing sleeve and packing are installed in the first valve shaft gland. The first valve shaft gland is also connected with a first valve shaft cover plate. The valve shaft lower bracket is installed at the bottom end of the first valve shaft, and the valve shaft lower bracket is fixedly installed with the three-way valve body or the first valve shaft gland.

[0008] Further preferably, the mounting assembly of the second valve shaft includes an upper valve shaft bracket, a second valve shaft gland, and a lower valve shaft bracket. The second valve shaft gland is respectively installed in the mounting holes on the top and bottom surfaces of the second flow channel. The second valve shaft passes through and is installed in the two second valve shaft glands. A bearing sleeve and packing are installed in the second valve shaft gland. The second valve shaft gland is also connected with a second valve shaft cover plate. The upper valve shaft bracket is installed at the upper end of the second valve shaft, and the lower valve shaft bracket is installed at the bottom end of the second valve shaft. The upper valve shaft bracket and the lower valve shaft bracket are fixedly installed with the corresponding three-way valve body or the second valve shaft gland. The actuator is fixedly installed with the three-way valve body or the upper valve shaft bracket.

[0009] Further preferably, a spherical crown for contact sealing with the valve seat is installed on the sealing surface of the eccentric valve plate through spherical crown mounting bolts. This makes the valve plate disassemblable and replaceable. The material of the spherical crown is 304 surfacing corrosion-resistant and cavitation-resistant hard alloy.

[0010] Further preferably, the pressure plate is connected and installed with the three-way valve body through pressure plate mounting bolts. The valve seat is fixedly installed on the valve body by the pressure plate through pressure plate mounting bolts, and forms a sealing pair with the working surface of the eccentric valve plate. Its material can be selected from polytetrafluoroethylene or fluororubber. The pressure plate is used to press the valve seat to closely combine it with the eccentric valve plate to achieve a sealing effect.

[0011] Further preferably, a ventilation hole is also provided on the three-way valve body. The ventilation hole is hermetically installed with a ventilation cover. The ventilation cover is made of a transparent material, which is convenient for observing the internal working conditions of the valve. When maintenance is required, the ventilation cover can be opened for ventilation.

[0012] The eccentric semi-spherical valve with quick-change seal is applicable to the juice-gas conversion in the sugar industry. Based on the original short-series steam sugar-making valve, it is a product finalized after long-term use under the comprehensive consideration of valve cost and reliability. It is installed on the evaporator of the sugar factory and used as a steam reversing device. Due to the use of soft seal, the operating temperature range is -40 - 250 degrees. It adopts an independent double-valve plate, soft and hard seals, and a double-support linkage structure. It can quickly close one end by 90 degrees while opening the other end, with flexible opening, high speed, safety and reliability, and is easy to automate. It adopts the working principle of an eccentric semi-spherical valve and is controlled by the linkage of two valve rods. When the main valve acts, through the rod, another valve plate moves forward synchronously. One valve flap approaches the position of one sealing ring, and one valve flap moves in the opposite direction away from the other end. Since the sealing structure is a camshaft wedge-tightening sealing structure, the valve plate will only exert pressure on the seal when it contacts the sealing ring, and the tighter it closes, the better. When it reaches the closed state, the other end is in the fully open position. Similarly, when moving in the opposite direction, one position is opened and the other inlet is closed, so as to achieve the purpose of controlling two outlets. The valve seat adopts replaceable rubber or polytetrafluoroethylene materials. The valve body is provided with maintenance holes and ventilation holes. After more than three years of use, the sealing material can be quickly replaced without disassembling the valve according to the actual situation. Since this valve has a 90-degree conversion, the valve shaft is easy to control without leakage. This valve can be operated manually, electrically, pneumatically, hydraulically, etc. as required. Brief Description of the Drawings

[0013] Figure 1 is the structural schematic diagram of the eccentric semi-spherical valve with quick-change seal;

[0014] Figure 2 is the schematic diagram of the installation relationship of the connecting rod;

[0015] Figure 3 is the internal structural schematic diagram of the valve body;

[0016] Figure 4 is the disassembly structural schematic diagram of the valve sealing part;

[0017] Figure 5 is Figure 3 the enlarged structural schematic diagram of part A in

[0018] The names corresponding to the numbers in the figure are:

[0019] 1. First flow channel; 2. First valve shaft; 3. First valve shaft gland; 4. First valve shaft cover plate; 5. Third flow channel; 6. Three-way valve body; 7. Gasket; 8. Maintenance cover; 9. Actuator; 10. Upper support of valve shaft; 11. Second valve shaft gland; 12. Second valve shaft; 13. Eccentric valve plate; 14. Second flow channel; 15. Rotating arm of second valve shaft; 16. Lower support of valve shaft; 17. Second valve shaft cover plate; 18. Connecting rod; 19. Rotating arm of first valve shaft; 20. Bearing sleeve; 21. Spherical crown; 22. Spherical crown mounting bolt; 23. Valve seat; 24. Pressure plate; 25. Pressure plate mounting bolt; 26. Vent hole. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0021] As Figure 1 and 2 shown, an eccentric semi-spherical valve with quick-change seal includes a three-way valve body 6. The three-way valve body 6 is provided with a first flow channel 1, a second flow channel 14, and a third flow channel 5. The positions of the first flow channel 1 and the second flow channel 14 on the three-way valve body 6 are arranged in an L shape. Mounting holes are respectively provided on the top and bottom surfaces of the first flow channel 1 and the second flow channel 14. A first valve shaft 2 is rotatably installed through the mounting component of the first valve shaft 2 in the mounting hole of the first flow channel 1. An eccentric valve plate 13 is installed on the first valve shaft 2 located in the first flow channel 1. A rotating arm 19 of the first valve shaft is installed at the bottom end of the first valve shaft 2 located outside the first flow channel 1; a second valve shaft 12 is rotatably installed through the mounting component of the second valve shaft 12 in the mounting hole of the second flow channel 14. An eccentric valve plate 13 is also installed on the second valve shaft 12 located in the second flow channel 14. A rotating arm 15 of the second valve shaft is installed at the bottom end of the second valve shaft 12 located outside the second flow channel 14. An actuator 9 for driving the rotation of the second valve shaft 12 is installed at the top end of the second valve shaft 12 located outside the second flow channel 14; a connecting rod 18 is connected between the rotating arm 15 of the second valve shaft and the rotating arm 19 of the first valve shaft; valve seats 23 for cooperating with the eccentric valve plate 13 for sealing are respectively pressed and installed at the inlets of the first flow channel 1 and the second flow channel 14. The pressure plates 24 are connected and installed to the three-way valve body 6 through pressure plate mounting bolts 25; a maintenance port is provided at the top of the three-way valve body 6 near the third flow channel 5. A gasket 7 and a maintenance cover 8 are installed on the maintenance port.

[0022] As Figure 1 、3 As shown in FIGS. 1 and 4, the mounting assembly of the first valve shaft 2 includes a first valve shaft gland 3 and a valve shaft lower bracket 16. The first valve shaft gland 3 is respectively installed in the mounting holes on the top and bottom surfaces of the first flow channel 1. The first valve shaft 2 is installed through the two first valve shaft glands 3. A bearing sleeve 20 and packing are installed in the first valve shaft gland 3. The first valve shaft gland 3 is also connected with a first valve shaft cover plate 4. The valve shaft lower bracket 16 is installed at the bottom end of the first valve shaft 2, and the valve shaft lower bracket 16 is fixedly installed with the three-way valve body 6 or the first valve shaft gland 3.

[0023] The mounting assembly of the second valve shaft 12 includes a valve shaft upper bracket 10, a second valve shaft gland 11 and a valve shaft lower bracket 16. The second valve shaft gland 11 is respectively installed in the mounting holes on the top and bottom surfaces of the second flow channel 14. The second valve shaft 12 is installed through the two second valve shaft glands 11. A bearing sleeve 20 and packing are installed in the second valve shaft gland 11. The second valve shaft gland 11 is also connected with a second valve shaft cover plate 17. The valve shaft upper bracket 10 is installed at the upper end of the second valve shaft 12, and the valve shaft lower bracket 16 is installed at the bottom end of the second valve shaft 12. The valve shaft upper bracket 10 and the valve shaft lower bracket 16 are fixedly installed with the corresponding three-way valve body 6 or the second valve shaft gland 11.

[0024] As Figure 3-5 shown, a spherical crown 21 for contacting and sealing with the valve seat 23 is installed on the sealing surface of the eccentric valve plate 13 through spherical crown mounting bolts 22.

[0025] A ventilation hole 26 is also provided on the three-way valve body 6, and a ventilation cover is installed in the ventilation hole.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An eccentric semi-spherical valve with a quickly replaceable seal, comprising a three-way valve body (6), wherein the three-way valve body (6) is provided with a first flow channel (1), a second flow channel (14) and a third flow channel (5), and is characterized in that: The positions of the described first flow channel (1) and second flow channel (14) on the three-way valve body (6) are arranged in an L shape. Mounting holes are respectively provided corresponding to the top and bottom surfaces of the first flow channel (1) and the second flow channel (14). A first valve shaft (2) is rotatably mounted through the mounting assembly of the first valve shaft in the mounting hole of the first flow channel (1). An eccentric valve plate (13) is mounted on the first valve shaft (2) located in the first flow channel (1). At the bottom end of the first valve shaft (2) located outside the first flow channel (1), a first valve shaft rotating arm (19) is mounted; in the mounting hole of the second flow channel (14), a second valve shaft (12) is rotatably mounted through the mounting assembly of the second valve shaft. An eccentric valve plate (13) is also mounted on the second valve shaft (12) located in the second flow channel (14). At the bottom end of the second valve shaft (12) located outside the second flow channel (1), a second valve shaft rotating arm (15) is mounted. At the top end of the second valve shaft (12) located outside the second flow channel (1), an actuator (9) for driving the rotation of the second valve shaft (12) is mounted; a connecting rod (18) is connected between the second valve shaft rotating arm (15) and the first valve shaft rotating arm (19); at the inlets of the first flow channel (1) and the second flow channel (14), valve seats (23) for cooperating with the eccentric valve plate (13) for sealing are respectively pressed and mounted through gland plates (24); at the top of the three-way valve body (6) near the third flow channel (5), a maintenance opening is provided, and a gasket (7) and a maintenance cover (8) are mounted on the maintenance opening.

2. The eccentric semi-spherical valve with a quickly replaceable seal according to claim 1, characterized in that: The mounting assembly of the described first valve shaft (2) includes a first valve shaft gland (3) and a valve shaft lower bracket (16). The first valve shaft gland (3) is respectively mounted in the mounting holes on the top and bottom surfaces of the first flow channel (1). The first valve shaft (2) is mounted through the two first valve shaft glands (3). A bearing sleeve (20) and packing are mounted in the first valve shaft gland (3). The first valve shaft gland (3) is also connected with a first valve shaft cover plate (4). The valve shaft lower bracket (16) is mounted at the bottom end of the first valve shaft (2), and the valve shaft lower bracket (16) is fixedly mounted with the three-way valve body (6) or the first valve shaft gland (3).

3. The eccentric semi-spherical valve with quickly replaceable seal according to claim 1, characterized in that: The mounting assembly of the described second valve shaft (12) includes a valve shaft upper bracket (10), a second valve shaft gland (11) and a valve shaft lower bracket (16). The second valve shaft gland (11) is respectively mounted in the mounting holes on the top and bottom surfaces of the second flow channel (14). The second valve shaft (12) is mounted through the two second valve shaft glands (11). A bearing sleeve (20) and packing are mounted in the second valve shaft gland (11). The second valve shaft gland (11) is also connected with a second valve shaft cover plate (17). The valve shaft upper bracket (10) is mounted at the upper end of the second valve shaft (12), and the valve shaft lower bracket (16) is mounted at the bottom end of the second valve shaft (12). The valve shaft upper bracket (10) and the valve shaft lower bracket (16) are fixedly mounted with the corresponding three-way valve body (6) or the second valve shaft gland (11).

4. The eccentric semi-spherical valve with quickly replaceable seal according to claim 1, characterized in that: The sealing surface of the described eccentric valve plate (13) is mounted with a spherical crown (21) for contacting and sealing with the valve seat (23) through spherical crown mounting bolts (22).

5. The eccentric semi-spherical valve with a quickly replaceable seal according to claim 1, characterized in that: The described pressure plate (24) is connected and installed to the three-way valve body (6) through pressure plate mounting bolts (25).

6. The eccentric semi-spherical valve with quickly replaceable seal according to claim 1, wherein: The described three-way valve body (6) is also provided with a ventilation hole (26), and a ventilation cover is installed on the ventilation hole.

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