Pre-tightening structure of eccentric ball valve

Abstract

The utility model discloses a pre-tightening structure of an eccentric ball valve, which relates to the field of eccentric ball valves, and comprises an eccentric ball valve consisting of a driving valve, a shell and an inner bin, and the eccentric ball valve is connected with a pipeline through a flange; the actuating end of the driving valve is connected with a valve through a connecting plate, an opening and closing component is arranged on the side wall of the valve, a sealing component is arranged at one end of the shell, and a pre-tightening mechanism is arranged on the outer wall of the shell. The pre-tightening mechanism comprises two fixing blocks which are symmetrically arranged on the outer wall of the shell with the center of the shell as the axis. Through the pre-tightening mechanism, after the driving valve drives the valve to seal the inner bin, the valve can be subjected to secondary sealing through the sealing air bag, the valve is straightened through impact of water flow when slightly deviating, the valve is fixed and subjected to secondary sealing through the cylindrical rod, different operations are carried out under different conditions, and the sealing effect is good. And secondary fixing and secondary sealing are conducted on the valve, and the pre-tightening effect is achieved.

Description

Technical Field

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

[0002] Eccentric ball valves and flanged gate valves are similar valves, differing in that their closing element is a sphere that rotates around the centerline of the valve body to open and close. Ball valves are primarily used in pipelines to cut off, distribute, and change the flow direction of media.

[0003] According to the patent document with application number CN202323479970.8, the top-mounted C-type eccentric ball valve with adjustable preload force can be known as the device includes a valve body, a valve cover, a valve stem, a valve seat, and a ball. The valve body adopts an integrated structure, a mounting port is provided in the middle cavity, and the ball adopts a C-type ball; its characteristics are: a preload adjustment device is provided on the outer circular surface of the valve seat, the preload adjustment device includes an adjusting ring, a spring, and an anti-backward bolt, the adjusting ring adopts an internal thread and an external thread made on the outer circular surface of the valve seat close to the sealing surface to cooperate with each other, the spring is installed between the adjusting ring and the radial annular table of the inner cavity of the valve body, and a number of radial screw holes connecting the inner and outer ring surfaces are provided in the circumferential direction of the adjusting ring, and the anti-backward bolt is threadedly installed in the radial screw hole.

[0004] The product described in the aforementioned patent adjusts the preload force between the valve seat sealing surface and the C-shaped ball sealing surface by adjusting the axial position of the stepped adjustment ring, eliminating the effect of component machining errors on the preload force between the sealing surfaces and improving the sealing performance of the sealing pair. Long-term use of an eccentric ball valve can cause the valve's sealing position to deviate, resulting in a poor sealing effect. Utility Model Content

[0005] Based on this, the purpose of the present invention is to provide a pre-tightening structure for an eccentric ball valve to solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: a pre-tightening structure of an eccentric ball valve, comprising an eccentric ball valve, which is composed of a drive valve, a housing and an inner chamber, wherein the eccentric ball valve is connected to a pipeline via a flange;

[0007] The actuator end of the drive valve is connected to the valve via a connecting plate, the side wall of the valve is provided with an opening and closing component, one end of the housing is provided with a sealing component, and the outer wall of the housing is provided with a pre-tightening mechanism;

[0008] The pre-tightening mechanism includes two fixing blocks symmetrically arranged on the outer wall of the shell with the center of the shell as the axis, the tops of the two fixing blocks are respectively provided with auxiliary components, and the tops of the two fixing blocks are respectively provided with clamping components.

[0009] Preferably, the auxiliary component includes an electric telescopic rod arranged on the top of the fixed block, the execution end of the electric telescopic rod is provided with a card block, and the electric telescopic rod is electrically connected to the PLC controller. In this preferred embodiment, the electric telescopic rod can drive the card block to move to perform secondary fixation on the cylindrical rod.

[0010] Preferably, the clamping component includes a movable groove provided on the top of the fixed block, the movable groove is electrically connected to a cylindrical rod, one end of the cylindrical rod is embedded with a sensing component, and the outer wall of the cylindrical rod is embedded with a clamping groove. In this preferred embodiment, the cylindrical rod is driven by an electric motor to move up and down in the movable groove. When the valve needs to be fixed, the valve can be fixed for the second time by simply moving the cylindrical rod into the slot hole of the valve.

[0011] Preferably, the sensing component includes an embedding groove embedded in one end of the cylindrical rod, a spring is provided at the bottom of the embedding groove, one end of the spring is connected to the abutment block, and a plurality of trigger rods are provided in a circular array on the side wall of the abutment block. In this preferred embodiment, when the abutment block touches the slot hole inside the valve, if it can be inserted smoothly, the valve can be fixed; if the valve is loose, the abutment block will tilt; when the cylindrical rod returns to its original position, the spring drives the abutment block to return to its original position through its own characteristics.

[0012] Preferably, the side of the abutment block close to the embedding groove is chamfered, and the top side of the embedding groove is also chamfered. The diameter of the abutment block is smaller than the diameter of the embedding groove. In this preferred embodiment, when the abutment block is tilted, it touches the embedding groove through the chamfer, which can reduce the friction between the embedding groove and the abutment block.

[0013] Preferably, the opening and closing component includes a solenoid valve provided on the side wall of the valve, and the solenoid valve is electrically connected to a PLC controller. In this preferred embodiment, the opening and closing component can be opened or closed at an appropriate time.

[0014] Preferably, the sealing component includes a sealing airbag embedded in the inner wall of the shell and with the execution end in contact with the outer wall of the valve. The sealing airbag is externally connected to an air pump. In this preferred embodiment, the sealing airbag can perform secondary sealing after the valve seals the pipeline.

[0015] In summary, the present invention has the following beneficial effects:

[0016] The electric telescopic rod can drive the block to move and fix the cylindrical rod for the second time. The cylindrical rod is driven by the motor to move up and down in the moving groove. When the valve needs to be fixed, it is only necessary to move the cylindrical rod into the slot of the valve to fix the valve for the second time. When the abutment block touches the slot inside the valve, if it can be inserted smoothly, the valve can be fixed. If the valve is loose, the abutment block will tilt. When the cylindrical rod returns to its original position, the spring drives the abutment block to return to its original position through its own characteristics. When the abutment block tilts, it touches the embedded groove through the chamfer, which can reduce the friction between the embedded groove and the abutment block. The opening and closing components can be opened or closed at the appropriate time, and the sealing airbag can perform secondary sealing after the valve seals the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axial view of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 This is an exploded view of the utility model;

[0020] Figure 4 This is an exploded view of the auxiliary components of the present utility model;

[0021] Figure 5 This is an exploded view of the sensing component of the present invention.

[0022] Description of the drawings: 10. Drive valve; 11. Shell; 12. Inner compartment; 13. Valve; 14. Opening and closing component; 141. Solenoid valve; 15. Sealing component; 151. Sealing airbag; 20. Pre-tightening mechanism; 21. Fixed block; 22. Auxiliary component; 221. Electric telescopic rod; 222. Card block; 23. Card-connecting component; 231. Moving groove; 232. Columnar rod; 233. Sensing component; 2331. Embedded groove; 2332. Spring; 2333. Abutment block; 2334. Trigger rod; 234. Card slot. 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. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] The following describes an embodiment of the present invention based on its overall structure. Example

[0025] Please refer to the attached Figure 1 、 2As shown in the figure, in a preferred embodiment of the present invention, a pre-tightening structure of an eccentric ball valve includes an eccentric ball valve, which is composed of a drive valve 10, a shell 11 and an inner chamber 12. The eccentric ball valve is connected to a pipeline through a flange.

[0026] It should be noted that, in this embodiment, the equipment is first debugged by the staff and then installed on the sewer pipe.

[0027] Please refer to the attached Figure 2 、 3 As shown in the figure, in a preferred embodiment of the present invention, the execution end of the driving valve 10 is connected to the valve 13 through a connecting plate, the side wall of the valve 13 is provided with an opening and closing component 14, one end of the shell 11 is provided with a sealing component 15, the outer wall of the shell 11 is provided with a pre-tightening mechanism 20, the opening and closing component 14 includes a solenoid valve 141 provided on the side wall of the valve 13, the solenoid valve 141 is electrically connected to the PLC controller, the sealing component 15 includes a sealing airbag 151 embedded in the inner wall of the shell 11 and the execution end is in contact with the outer wall of the valve 13, and the sealing airbag 151 is externally connected to an air pump.

[0028] It should be noted that, in this embodiment, when the valve 13 needs to be closed, the driving valve 10 is started to drive the valve 13 to move in the inner chamber 12 until one of the water outlets is closed. After the valve 13 is closed, the air pump is first started to inflate the sealing airbag 151 to inflate the sealing airbag 151 and fit it against the outer wall of the valve 13 for secondary sealing.

[0029] Please refer to the attached Figure 2 、 3 As shown in Figures 4 and 5, in a preferred embodiment of the present invention, the pre-tightening mechanism 20 includes two fixed blocks 21 symmetrically arranged on the outer wall of the shell 11 with the center of the shell 11 as the axis, the tops of the two fixed blocks 21 are respectively provided with auxiliary components 22, and the tops of the two fixed blocks 21 are respectively provided with clamping components 23. The auxiliary components 22 include an electric telescopic rod 221 arranged on the top of the fixed block 21, and the execution end of the electric telescopic rod 221 is provided with a clamping block 222. The electric telescopic rod 221 is electrically connected to the PLC controller, and the clamping component 23 includes a movable groove 231 arranged on the top of the fixed block 21, and the movable groove 231 is electrically connected to the column shaped rod 232, one end of the cylindrical rod 232 is embedded with a sensing component 233, the outer wall of the cylindrical rod 232 is embedded with a card slot 234, the sensing component 233 includes an embedding groove 2331 embedded in one end of the cylindrical rod 232, a spring 2332 is provided at the bottom of the embedding groove 2331, one end of the spring 2332 is connected to the abutment block 2333, and a plurality of trigger rods 2334 are provided in a circular array on the side wall of the abutment block 2333. The side of the abutment block 2333 near the embedding groove 2331 is chamfered, and the top side of the embedding groove 2331 is also chamfered. The diameter of the abutment block 2333 is smaller than the diameter of the embedding groove 2331.

[0030] It should be noted that, in this embodiment, the motor is then used to drive the cylindrical rod 232 to move in the movable groove 231, driving the cylindrical rod 232 to be inserted into the corresponding slot of the valve 13 to fix the position of the valve 13, and then the electric telescopic rod 221 is started to drive the clamping block 222 to move into the clamping groove 234 to fix the cylindrical rod 232 for a second time. When the position of the valve 13 is slightly offset after a long period of use, the cylindrical rod 232 will first touch the outer wall of the valve 13 before inserting into the corresponding slot. At this time, the abutment block 2333 will tilt because it cannot be smoothly inserted into the slot. At this time, the inclined surface of the abutment block 2333 The corresponding trigger rod 2334 first touches the bottom of the embedded groove 2331, resulting in different force data on the multiple trigger rods 2334. At this time, the motor drives the cylindrical rod 232 to return to its original position, and the spring 2332 simultaneously returns the abutment block 2333 to its original position, preventing damage to the outer wall of the valve 13. The data from the trigger rod 2334 is now transmitted to the PLC controller, which analyzes the data and then opens the solenoid valve 141. Water flows out of the solenoid valve 141. Due to the high pressure in the pipeline, this exerts an impact force on the valve 13, pushing the valve 13 into the correct position. The cylindrical rod 232 is then quickly inserted into the slot of the valve 13. The locking block 222 is then inserted into the locking groove 234 to secure the cylindrical rod 232 again and inflate the sealing airbag 151. At the same time, the problem of valve 13 deviation is reported to the back-end, notifying the staff for maintenance. This operation can restore the valve 13 to its original position and reseal it through the coordination of multiple devices when the valve 13 deviates slightly, achieving a pre-tightening and protective effect.

[0031] The working principle of this utility model is:

[0032] The electrical components in the utility model are all triggered to operate by the PLC controller.

[0033] First, the staff will debug the equipment and then install the equipment on the sewer pipe. When the valve 13 needs to be closed, the driving valve 10 is started to drive the valve 13 to move in the inner chamber 12 until one of the water outlets is closed. When the valve 13 is closed, the air pump is first started to inflate the sealing airbag 151 to swell the sealing airbag 151 and fit the outer wall of the valve 13 for secondary sealing. Then, the motor is used to drive the cylindrical rod 232 to move in the movable groove 231, drive the cylindrical rod 232 to be inserted into the corresponding slot hole of the valve 13, and fix the position of the valve 13. Then, the electric telescopic rod 221 is started to drive the block 222 to move into the slot 234, and the cylindrical rod 232 is fixed for a secondary time. When the position of the valve 13 is slightly offset after a long period of use, the cylindrical rod 232 is inserted into the corresponding slot hole before being inserted into the corresponding slot hole. The abutment block 2333 will first touch the outer wall of the valve 13. At this time, the abutment block 2333 will tilt because it cannot be smoothly inserted into the slot. At this time, the trigger rod 2334 corresponding to the inclined surface of the abutment block 2333 will first touch the bottom of the embedded slot 2331, so that the force data of the multiple trigger rods 2334 are different. At this time, the motor drives the cylindrical rod 232 to return to its original position. At the same time, the spring 2332 will restore the abutment block 2333 to its original position to prevent damage to the outer wall of the valve 13. At this time, the data of the trigger rod 2334 is sent to the PLC controller, the PLC controller analyzes the data, and then opens the solenoid valve 141. Water will rush out of the solenoid valve 141. Because the pressure in the pipeline is very high, an impact force will be generated on the valve 13 to correct the position of the valve 13, and then the cylindrical rod 232 will be quickly inserted into the valve 13. The slot hole of the valve 13 is inserted into the card block 222, and the card slot 234 is inserted into the card block 222 to fix the cylindrical rod 232 for the second time and inflate the sealing airbag 151. At the same time, the problem of the valve 13 being offset is fed back to the background, and the staff is informed to carry out maintenance. The above operation can restore the valve 13 to its original state and seal it again through the cooperation of multiple devices when the valve 13 is slightly offset to achieve the effect of pre-tightening and protection.

[0034] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A pre-tightening structure for an eccentric ball valve, characterized in that: It comprises an eccentric ball valve, which is composed of a driving valve (10), a housing (11) and an inner chamber (12), wherein the eccentric ball valve is connected to a pipeline via a flange; The actuator end of the driving valve (10) is connected to the valve (13) via a connecting plate, the side wall of the valve (13) is provided with an opening and closing component (14), one end of the housing (11) is provided with a sealing component (15), and the outer wall of the housing (11) is provided with a pre-tightening mechanism (20); The pre-tightening mechanism (20) comprises two fixed blocks (21) symmetrically arranged on the outer wall of the shell (11) with the center of the shell (11) as an axis, and the tops of the two fixed blocks (21) are respectively provided with auxiliary components (22), and the tops of the two fixed blocks (21) are respectively provided with clamping components (23).

2. The pre-tightening structure of an eccentric ball valve according to claim 1, characterized in that: The auxiliary component (22) comprises an electric telescopic rod (221) provided on the top of the fixed block (21), a clamping block (222) being provided at an execution end of the electric telescopic rod (221), and the electric telescopic rod (221) is electrically connected to a PLC controller.

3. The pre-tightening structure of an eccentric ball valve according to claim 1, characterized in that: The clamping component (23) comprises a movable groove (231) provided on the top of the fixed block (21); the movable groove (231) is electrically connected to a columnar rod (232); an induction component (233) is embedded in one end of the columnar rod (232); and a clamping groove (234) is embedded in the outer wall of the columnar rod (232).

4. The pre-tightening structure of an eccentric ball valve according to claim 3, characterized in that: The sensing component (233) comprises an embedding groove (2331) embedded in one end of the cylindrical rod (232); a spring (2332) is provided at the bottom of the embedding groove (2331); one end of the spring (2332) is connected to an abutment block (2333); and a plurality of trigger rods (2334) are provided in a circumferential array on the side wall of the abutment block (2333).

5. The pre-tightening structure of an eccentric ball valve according to claim 4, characterized in that: The side of the abutment block (2333) close to the embedding groove (2331) is chamfered, and the top side of the embedding groove (2331) is also chamfered. The diameter of the abutment block (2333) is smaller than the diameter of the embedding groove (2331).

6. The pre-tightening structure of an eccentric ball valve according to claim 1, characterized in that: The opening and closing component (14) comprises a solenoid valve (141) provided on a side wall of the valve (13), and the solenoid valve (141) is electrically connected to a PLC controller.

7. The pre-tightening structure of an eccentric ball valve according to claim 1, characterized in that: The sealing component (15) comprises a sealing airbag (151) embedded in the inner wall of the housing (11) and having an actuating end in contact with the outer wall of the valve (13); the sealing airbag (151) is externally connected to an air pump.

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