Eccentric ball valve with wear-free inflatable sealing structure

Abstract

The invention discloses an eccentric ball valve with a wear-free inflatable sealing structure, and relates to the field of sealing structures, the eccentric ball valve comprises a driving valve, a shell, a connecting flange and a sealing valve, and the connecting flange is connected with a drainage pipeline; a rotating part is embedded in the bottom of the driving valve, a rotating rod is arranged at the execution end of the rotating part, a springback part is arranged on the side wall of the sealing valve, an inflation part is arranged at the joint of the shell and the connecting flange, and a protection mechanism is arranged on the outer wall of the rotating rod. The protection mechanism comprises a plurality of connecting plates which are symmetrically arranged on the outer wall of the rotating rod with the center of the rotating rod as the axis, pulling parts are embedded in the connecting plates, and the execution ends of the pulling parts are each provided with two protection nets. According to the eccentric ball valve, abrasion generated in the eccentric ball valve due to foreign matter in water or when the sealing valve 12 is opened and closed can be prevented through arranged components, and the service life of the eccentric ball valve is greatly prolonged.

Description

Technical Field

[0001] The invention mainly relates to the technical field of sealing structures, in particular to an eccentric ball valve with a wear-free inflatable sealing structure. Background Art

[0002] The eccentric ball valve and flange gate valve are valves of the same type, the difference is that its closing piece is a sphere, which rotates around the center line of the valve body to open and close. Ball valves are mainly used to cut off, distribute and change the flow direction of the medium in the pipeline.

[0003] According to an eccentric ball valve with a wear-free inflatable sealing structure provided by the patent document with application number CN202021956229.X, the device includes a ball valve body, a first valve stem and a second valve stem respectively fixed on opposite side surfaces of the ball valve body, and a sealing ball rotatably connected to the first valve stem and the second valve stem, the ball valve body is provided with an installation groove along the inner wall, and a first inflatable sealing component is clamped in the installation groove; the first inflatable sealing component includes a first fixed ventilation piece and a first inflatable seal clamped with the first fixed ventilation piece, the first inflatable seal is clamped in the installation groove, the cross-section of the first inflatable seal is an inverted "J" shape, and the side of the first inflatable seal close to the sealing ball matches the surface of the sealing ball.

[0004] The product in the above patent has a simple and practical structure, good sealing performance, can be used for a long time without wear and tear, reduces replacement and maintenance, and greatly improves the working efficiency of the eccentric ball valve. The eccentric ball valve at the connection of the sewer pipe is often scratched by branches or other sharp objects, which will cause wear and tear on the internal structure of the eccentric ball valve, greatly reducing the sealing life of the eccentric ball valve. Summary of the invention

[0005] Based on this, the object of the present invention is to provide an eccentric ball valve with a wear-free inflatable sealing structure 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: an eccentric ball valve with a wear-free inflatable sealing structure, comprising an eccentric ball valve, which is composed of a drive valve, a housing, a connecting flange and a sealing valve, wherein the connecting flange is connected to a drainage pipe; A rotating component is embedded in the bottom of the driving valve, a rotating rod is provided at the execution end of the rotating component, a rebound component is provided at the side wall of the sealing valve, an inflatable component is provided at the connection between the shell and the connecting flange, and a protective mechanism is provided on the outer wall of the rotating rod; The protective mechanism includes a plurality of connecting plates symmetrically arranged on the outer wall of the rotating rod with the center of the rotating rod as the axis, and pulling components are embedded in the interior of the plurality of connecting plates. Two protective nets are respectively provided at the execution ends of the pulling components. The two protective nets are connected to the outer wall of the rotating rod through a storage rod, and the inner wall of the storage rod engages with the engaging component.

[0007] Preferably, the pulling component includes a convex groove arranged inside the plurality of connecting plates, the side walls of the convex groove are provided with three first springs, one ends of the three first springs are connected to the convex block, and the side walls of the convex block are fixedly connected to the two protective nets. In this preferred embodiment, the three springs inside the convex groove can drive the convex block to move on the connecting rod, and when the protective net needs to be released, the storage rod is rotated to drive the convex block to move in the convex groove through the elastic force of the three springs to unfold the protective net.

[0008] Preferably, the engaging component includes a first motor embedded in the rotating rod, the execution end of the first motor is provided with a gear, the gear engages with the inner wall of the storage rod, the first motor is electrically connected to the PLC controller, and in this preferred embodiment, the first motor sends instructions through the PLC controller to drive the gear to rotate, the gear engages with the storage rod to drive the storage rod to rotate, and the protective net can be collected or unfolded.

[0009] Preferably, the rotating component includes a second motor embedded in the bottom of the driving valve, the actuator end of the second motor is connected to the top of the rotating rod, and the second motor is electrically connected to the PLC controller. In this preferred embodiment, the second motor can drive the rotating rod to rotate, and when the direction of the protective net needs to be adjusted, the second motor can be started to drive the rotating rod to rotate and adjust.

[0010] Preferably, the rebound component includes two fixed blocks which are symmetrically arranged on the side walls of the sealing valve with the center of the sealing valve as the axis, and the side walls of the two fixed blocks are respectively embedded with multiple second springs, and one end of the multiple second springs is fixed to the connecting rod of the driving valve. In this preferred embodiment, when the sealing valve needs to be opened, in order to prevent wear of the sealing valve and the inflatable sealing pad, the electromagnetic block can be closed so that the fixed block can be driven by the second spring to move the sealing valve, and then the driving valve is started to drive the sealing valve to rotate.

[0011] Preferably, the inflatable component includes an inflatable sealing gasket arranged between the shell and the connecting flange, and the air inlet end of the inflatable sealing gasket is externally connected to an air pump. In this preferred embodiment, the inflatable sealing gasket is inflated by the external air pump, and when the sealing valve closes the output port, the inflatable sealing gasket performs secondary sealing on the meshing portion between the output port and the sealing valve.

[0012] Preferably, an electromagnetic block is provided on the side wall opposite to the connecting plate and the fixed block and a repulsive force is generated between the two electromagnetic blocks. The electromagnetic block is electrically connected to the PLC controller. In this preferred embodiment, the two electromagnetic blocks between the connecting rod and the fixed block can generate a repulsive force, so that when the sealing valve is closed, starting the electromagnetic block can make the sealing valve fit onto the contact surface between the sealing valve and the inflatable sealing cushion.

[0013] Preferably, a connecting pipe is provided on the side of the shell away from the connecting flange, a foreign body sensor is provided inside the connecting pipe, and the foreign body sensor is electrically connected to the PLC controller. In this preferred embodiment, the foreign body sensor can sense whether a large amount of foreign matter is input from the pipe.

[0014] Preferably, the bottom of the rotating rod is connected to the connecting rod of the driving valve via a rotating shaft. In this preferred embodiment, when the rotating rod is rotated, it can rotate normally.

[0015] Preferably, the storage rod is connected between the plurality of connecting plates via a rotating shaft. In this preferred embodiment, the storage rod can be rotated via the rotating shaft and then store the protective net on the outer wall.

[0016] In summary, the present invention mainly has the following beneficial effects: The three springs inside the convex groove can drive the convex block to move on the connecting rod. When the protective net needs to be released, the rotating storage rod drives the convex block to move in the convex groove through the elastic force of the three springs to unfold the protective net. The first motor sends instructions through the PLC controller to drive the gear to rotate, and the gear engages the storage rod to drive the storage rod to rotate, so that the protective net can be collected or unfolded. The single machine can drive the rotating rod to rotate. When the direction of the protective net needs to be adjusted, the second motor can be started to drive the rotating rod to rotate and adjust. When the sealing valve needs to be opened, in order to prevent the wear of the sealing valve and the inflatable sealing pad, the electromagnetic block can be closed so that the second spring can be used to drive The fixed block moves the sealing valve, and then starts the driving valve to drive the sealing valve to rotate. The inflatable sealing pad is inflated by an external air pump. When the sealing valve closes the output port, the inflatable sealing pad performs secondary sealing on the meshing portion between the output port and the sealing valve. The two electromagnetic blocks between the connecting rod and the fixed block can generate repulsive force. In this way, when the sealing valve is closed, the electromagnetic block can be started to fit the sealing valve to the contact surface between the sealing valve and the inflatable sealing pad. The foreign body sensor can sense whether there is a large amount of foreign matter input from the pipeline. When the rotating rod rotates, it can rotate normally. The storage rod can rotate through the rotating shaft and then store the protective net on the outer wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an axial view of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 An exploded view of the housing of the present invention; Figure 4 An exploded view of the sealing valve of the present invention; Figure 5 It is a schematic diagram of the enlarged structure of point A of the present invention; Figure 6 An exploded view of the protection mechanism of the present invention; Figure 7 It is a schematic diagram of the enlarged structure of point B of the present invention.

[0018] Description of the drawings: 10. Drive valve; 11. Shell; 111. Foreign body sensor; 12. Sealing valve; 13. Rotating component; 131. Second motor; 14. Rotating rod; 15. Rebound component; 151. Fixed block; 152. Second spring; 16. Inflatable component; 161. Inflatable sealing pad; 20. Protective mechanism; 21. Connecting plate; 22. Pulling component; 221. Convex groove; 222. First spring; 223. Convex block; 23. Protective net; 24. Storage rod; 25. Engaging component; 251. First motor; 252. Gear. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying 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 accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] The following describes an embodiment of the present invention based on its overall structure. Example

[0021] Please refer to the attached Figure 1 , 2 As shown in Figure 3, in a preferred embodiment of the present invention, an eccentric ball valve with a wear-free inflatable sealing structure includes an eccentric ball valve, which is composed of a drive valve 10, a shell 11, a connecting flange and a sealing valve 12, and the connecting flange is connected to a drainage pipe.

[0022] It should be noted that, in this embodiment, the staff first connects the eccentric ball valve to the sewer pipe through the connecting flange, and then debugs the equipment after the equipment is installed.

[0023] Please refer to the attached Figure 2 , 5As shown in FIG. 6 , in a preferred embodiment of the present invention, a rotating component 13 is embedded in the bottom of the driving valve 10, a rotating rod 14 is provided at the execution end of the rotating component 13, a rebound component 15 is provided on the side wall of the sealing valve 12, an inflatable component 16 is provided at the connection between the housing 11 and the connecting flange, a protective mechanism 20 is provided on the outer wall of the rotating rod 14, the rotating component 13 includes a second motor 131 embedded in the bottom of the driving valve 10, the execution end of the second motor 131 is connected to the top of the rotating rod 14, the second motor 131 is electrically connected to the PLC controller, and the rebound component 15 includes a plurality of motors 131 and a plurality of motors 131 disposed on the bottom of the driving valve 10, wherein ... There are two fixed blocks 151 on the side walls of the sealing valve 12, and multiple second springs 152 are respectively embedded in the side walls of the two fixed blocks 151. One end of the multiple second springs 152 is fixed on the connecting rod of the driving valve 10. The inflatable component 16 includes an inflatable sealing pad 161 arranged between the shell 11 and the connecting flange. The air inlet end of the inflatable sealing pad 161 is externally connected to an air pump. A connecting pipe is provided on the side of the shell 11 away from the connecting flange. A foreign body sensor 111 is provided inside the connecting pipe. The foreign body sensor 111 is electrically connected to the PLC controller. The bottom of the rotating rod 14 is connected to the connecting rod of the driving valve 10 through a rotating shaft.

[0024] It should be noted that, in this embodiment, after debugging is completed, when sewage enters the sewer pipe, the sealing valve 12 is in an open state, and the foreign body sensor 111 senses whether there are a large number of sharp objects in the sewage.

[0025] Please refer to the attached Figure 3 , 4 As shown in FIGS. 6 and 7 , in a preferred embodiment of the present invention, the protection mechanism 20 includes a plurality of connecting plates 21 symmetrically arranged on the outer wall of the rotating rod 14 with the center of the rotating rod 14 as an axis, a pulling component 22 is embedded in the interior of the plurality of connecting plates 21, and two protection nets 23 are respectively arranged at the execution ends of the pulling components 22, and the two protection nets 23 are connected to the outer wall of the rotating rod 14 through a receiving rod 24, and the inner wall of the receiving rod 24 engages with the engaging component 25, and the pulling component 22 includes a convex groove 221 arranged inside the plurality of connecting plates 21, and the convex groove 221 is provided inside the plurality of connecting plates 21. The side wall of the groove 221 is provided with three first springs 222, one end of the three first springs 222 is connected to the convex block 223, the engaging component 25 includes a first motor 251 embedded in the rotating rod 14, the execution end of the first motor 251 is provided with a gear 252, the gear 252 engages with the inner wall of the storage rod 24, the first motor 251 is electrically connected to the PLC controller, the side wall of the connecting plate 21 opposite to the fixed block 151 is provided with an electromagnetic block and a repulsive force is generated between the two electromagnetic blocks, and the electromagnetic block is electrically connected to the PLC controller.

[0026] It should be noted that, in the present embodiment, if there are many foreign objects, the second motor 131 is started to drive the rotating rod 14 to rotate, and the protective net 23 is rotated to face the direction of water flow. The protective net 23 will buffer the foreign objects in the water and reduce the excessive impact force of the foreign objects in the water caused by the excessively fast water flow, which will cause wear or damage to the inner chamber of the eccentric ball valve. When the sealing valve 12 needs to be closed, the direction of the protective net 23 is turned by the second motor 131 to make the buffered foreign objects continue to flow in the direction of the water flow. Because the aperture on the protective net 23 is large, it will not affect the flow rate of the water in the pipeline. Then the driving valve 10 is started to drive The connecting rod rotates the sealing valve 12. At this time, the sealing valve 12 is not attached to the inner chamber of the shell 11. When the sealing valve 12 rotates to the output port, the second motor 131 is started to drive the rotating rod 14 to align the side wall of the connecting plate 21 with the side wall of the fixing block 151, and then the fixing block 151 squeezes the second spring 152 through the repulsive force generated by the two electromagnetic blocks. At this time, the sealing valve 12 moves until it is attached to the inner chamber of the shell 11 and stops. Then the air pump is started to restart the inflatable sealing cushion 161 until it is completely attached to the sealing valve 12 and stops. When the sealing valve 12 is closed for a long time, the first motor 251 is started to drive the rotating rod 14 to align the side wall of the connecting plate 21 with the side wall of the fixing block 151. The movable gear 252 rotates, and the gear 252 engages with the storage rod 24 to drive it to rotate. At this time, the protective net 23 drives the convex block 223 to move in the convex groove 221 to squeeze the first spring 222, and then the storage rod 24 rotates to roll the protective net 23 on the storage rod 24. This is to prevent the slot holes on the protective net 23 from being soaked in water for a long time because some substances are attached to the slot holes, resulting in a decrease in the flow rate of the water flow due to the smaller slot holes, and the practical effect of the eccentric ball valve is reduced. When the protective net 23 needs to be unfolded, only the first motor 251 needs to be reversed. At this time, the first spring 222 restores its elasticity and the protective net is rolled up. 23 slowly unfolds, and when the sealing valve 12 needs to be opened again, the electromagnetic block is stopped. At this time, the second spring 152 restores the elastic force to drive the fixing block 151 to move on the connecting rod on the driving valve 10. At this time, the sealing valve 12 is no longer in contact with the shell 11 and the inflatable sealing pad 161, so that it can prevent the shell 11 and the inflatable sealing pad 161 from being worn during rotation. When the sealing valve 12 is opened, the inflatable sealing pad 161 is deflated by the air pump. The above operation can prevent the inside of the eccentric ball valve from being worn due to foreign matter in the water or worn when the sealing valve 12 is opened, thereby greatly improving the service life of the eccentric ball valve.

[0027] The working principle of the present invention is: The electrical components in the present invention are all triggered to operate by a PLC controller.

[0028] The staff first connects the eccentric ball valve to the sewer pipe through the connecting flange. After the equipment is installed, it is debugged. After the debugging is completed, when sewage enters the sewer pipe, the sealing valve 12 is in the open state, and the foreign body sensor 111 senses whether there are a large number of sharp objects in the sewage. If there are many foreign objects, the second motor 131 is started to drive the rotating rod 14 to rotate, and the protective net 23 is rotated to face the direction of water flow. The protective net 23 will buffer the foreign objects in the water and reduce the impact force of the foreign objects in the water caused by the fast water flow. Excessive wear or damage to the inner compartment of the eccentric ball valve. When the sealing valve 12 needs to be closed, the direction of the protective net 23 is driven to flip by the second motor 131. The buffered foreign matter continues to flow in the direction of the water flow. Since the aperture of the protective net 23 is large, it will not affect the flow rate of the water in the pipeline. Then the driving valve 10 is started to drive the connecting rod to rotate the sealing valve 12. At this time, the sealing valve 12 is not attached to the inner compartment of the shell 11. When the sealing valve 12 rotates to the output port, the second motor 131 is started to drive the rotating rod 14 to align the side wall of the connecting plate 21 with the side wall of the fixed block 151. Then, the fixed block 151 squeezes the second spring 152 through the repulsive force generated by the two electromagnetic blocks. At this time, the sealing valve 12 moves until it stops when it is attached to the inner compartment of the shell 11. Then the air pump is started to restart the inflatable sealing cushion 161 until it is in contact with the inner compartment of the shell 11. The sealing valve 12 stops when it is completely fitted. When the sealing valve 12 is closed for a long time, the first motor 251 is started to drive the gear 252 to rotate. The gear 252 engages the storage rod 24 to drive it to rotate. At this time, the protective net 23 drives the convex block 223 to move in the convex groove 221 to squeeze the first spring 222, and then the storage rod 24 rotates to roll the protective net 23 on the storage rod 24. This is to prevent the slot holes on the protective net 23 from being soaked in water for a long time because some substances are attached to the slot holes, resulting in a decrease in the flow rate of the water flow due to the smaller slot holes, and the practical effect of the eccentric ball valve is reduced. When the protective net 23 needs to be unfolded, only the first motor 251 needs to be reversed. At this time, the first spring 222 restores its elastic force and slowly unfolds the protective net 23. When the sealing valve 12 needs to be opened again, the electromagnetic block is stopped. At this time, the second spring 152 restores its elastic force to drive the fixed block 151 to move on the connecting rod on the drive valve 10. At this time, the sealing valve 12 no longer fits the shell 11 and the inflatable sealing pad 161. In this way, it can prevent wear between it and the shell 11 and the inflatable sealing pad 161 during rotation. When the sealing valve 12 is opened, the inflatable sealing pad 161 is deflated by the air pump. The above operation can prevent the wear inside the eccentric ball valve due to foreign matter in the water or wear caused by opening and closing the sealing valve 12, thereby greatly improving the service life of the eccentric ball valve.

[0029] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the 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 without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An eccentric ball valve with a wear-free inflatable sealing structure, characterized in that: It comprises an eccentric ball valve, which is composed of a drive valve (10), a housing (11), a connecting flange and a sealing valve (12), wherein the connecting flange is connected to a drainage pipe; A rotating component (13) is embedded in the bottom of the driving valve (10), a rotating rod (14) is provided at the actuating end of the rotating component (13), a resilient component (15) is provided on the side wall of the sealing valve (12), an inflatable component (16) is provided at the connection between the housing (11) and the connecting flange, and a protective mechanism (20) is provided on the outer wall of the rotating rod (14); The protective mechanism (20) comprises a plurality of connecting plates (21) symmetrically arranged on the outer wall of the rotating rod (14) with the center of the rotating rod (14) as an axis, a pulling component (22) is embedded inside the plurality of connecting plates (21), and two protective nets (23) are respectively arranged at the execution ends of the pulling components (22), and the two protective nets (23) are connected to the outer wall of the rotating rod (14) via a storage rod (24), and the inner wall of the storage rod (24) engages with the engaging component (25).

2. An eccentric ball valve with a wear-free inflatable seal structure according to claim 1, characterized in that: The pulling component (22) comprises a convex groove (221) provided inside the plurality of connecting plates (21), the side wall of the convex groove (221) being provided with three first springs (222), one end of the three first springs (222) being connected to a convex block (223), and the side wall of the convex block (223) being fixedly connected to the two protective nets (23).

3. The eccentric ball valve with a wear-free inflatable seal structure according to claim 1, characterized in that: The meshing component (25) comprises a first motor (251) embedded in the rotating rod (14); an execution end of the first motor (251) is provided with a gear (252); the gear (252) meshes with the inner wall of the storage rod (24); and the first motor (251) is electrically connected to a PLC controller.

4. The eccentric ball valve with a wear-free inflatable seal structure according to claim 1, characterized in that: The rotating component (13) comprises a second motor (131) embedded in the bottom of the driving valve (10), the execution end of the second motor (131) is connected to the top of the rotating rod (14), and the second motor (131) is electrically connected to a PLC controller.

5. The eccentric ball valve with a wear-free inflatable seal structure according to claim 1, characterized in that: The resilient component (15) comprises two fixed blocks (151) symmetrically arranged on the side wall of the sealing valve (12) with the center of the sealing valve (12) as an axis, and a plurality of second springs (152) are respectively embedded in the side walls of the two fixed blocks (151), and one end of the plurality of second springs (152) is fixed to the connecting rod of the driving valve (10).

6. The eccentric ball valve with a wear-free inflatable seal structure according to claim 1, characterized in that: The inflatable component (16) comprises an inflatable sealing pad (161) provided between the housing (11) and the connecting flange, and an air inlet end of the inflatable sealing pad (161) is externally connected to an inflatable pump.

7. An eccentric ball valve with a wear-free inflatable seal structure according to claim 5, characterized in that: An electromagnetic block is provided on the side wall of the connecting plate (21) opposite to the fixing block (151), and a repulsive force is generated between the two electromagnetic blocks, and the electromagnetic block is electrically connected to a PLC controller.

8. The eccentric ball valve with a non-wearing inflatable seal structure according to claim 1, characterized in that: A connecting pipe is provided on a side of the housing (11) away from the connecting flange, a foreign body sensor (111) is provided inside the connecting pipe, and the foreign body sensor (111) is electrically connected to a PLC controller.

9. The eccentric ball valve with a non-wearing inflatable seal structure according to claim 1, characterized in that: The bottom of the rotating rod (14) is connected to the connecting rod of the driving valve (10) via a rotating shaft.

10. An eccentric ball valve with a wear-free inflatable seal structure according to claim 6, characterized in that: The storage rod (24) is connected between the plurality of connection plates (21) via a rotating shaft.

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