Anti-locking structure and Y-shaped boneless pneumatic stop valve

Abstract

The anti-locking structure comprises a stop valve body, the top of the stop valve body is fixedly connected with an execution electric cylinder and a suction air cylinder, the execution electric cylinder drives a driving plate to telescopically slide in a cavity channel in the top of the stop valve body, and the driving plate is movably connected with a rotating assembly through a pressure-bearing bearing; a transmission mechanism is arranged in the rotating assembly and drives the sealing valve plate to swing below the rotating assembly through a contraction mechanism. The multiple sets of sealing valve plates are distributed in an annular array mode relative to the axis of the rotating assembly. A cleaning cavity assembly is further arranged in the stop valve body, the cleaning cavity assembly and the rotating assembly are coaxial, the valve plate can be effectively opened to a certain degree firstly, fluid pressure can be effectively relieved, then the operation of opening and closing the valve port in a rotary mode is achieved, and the problem that the valve plate cannot be normally opened and closed due to too large stress is effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of industrial valves, and in particular to an anti-stuck structure and a Y-type pneumatic stop valve without a valve cover. Background Art

[0002] Pneumatic stop valve is a common industrial control valve, which is widely used, mainly used to cut off and regulate the flow of fluid. The design feature of the stop valve is that the valve stem drives the valve disc to move perpendicular to the flow direction of the fluid, thereby realizing the cutoff and opening of the fluid. The valve plate of the current start-up stop valve uses pneumatic means to identify and open the valve pipe, thereby achieving opening and closing. However, in the use of individual industrial pipelines, the liquid under high pressure will increase the lateral pressure on the valve plate, making it impossible for the actual pneumatic stop valve to drive the valve plate to expand or close operations. In addition, the surface of the valve plate in the normally closed state is prone to dirt from the fluid, which is more common in the field of sewage treatment. Dirt will also cause adhesion stress between the valve plate and the valve body, which further causes the valve plate to be unable to achieve expansion and closing operations, making the current pneumatic stop valve in such high-pressure and sewage pipe fields less practical.

[0003] Therefore, how to provide an anti-stuck structure and a Y-type bonnetless pneumatic stop valve is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] One purpose of the present invention is to propose an anti-stuck structure and a Y-type pneumatic stop valve without a valve cover. The present invention can effectively realize that the valve plate first expands a certain opening, effectively relieves the fluid pressure, and then realizes the operation of rotating the valve port to open and close, effectively preventing the problem that the valve plate is subjected to excessive force and cannot be opened and closed normally.

[0005] According to an embodiment of the present invention, an anti-stuck structure and a Y-type pneumatic stop valve without a valve cover include a stop valve body, an actuating electric cylinder and a suction cylinder are fixedly connected to the top of the stop valve body, the actuating electric cylinder drives a driving plate to slide in a cavity at the top of the stop valve body, the driving plate is movably connected to a rotating assembly through a pressure bearing, a transmission mechanism is arranged inside the rotating assembly, and the transmission mechanism drives a sealing valve plate to swing below the rotating assembly through a contraction mechanism; The number of sealing valve plates is several groups, and the several groups of sealing valve plates are distributed in a ring array about the axis of the rotating component; A cleaning chamber assembly is also provided inside the stop valve body. The cleaning chamber assembly is coaxial with the rotating assembly. The rotating assembly drives the sealing valve plate to move to the position of the cleaning chamber assembly so as to clean the surface of the sealing valve plate.

[0006] Furthermore, the rotating assembly includes a movable column, several groups of valve plates and a base ring, the several groups of valve plates are fixed between the movable column and the base ring, the number of valve plates is the same as the sealing valve plates and the valve plates are distributed in a circular array about the axis of the movable column, a single group of sealing valve plates is arranged between two adjacent groups of valve plates, and the two side surfaces of the sealing valve plates are in bevel sealing contact with the valve plates.

[0007] Furthermore, a suction chamber is provided inside the movable column, a piston ring is sealingly slidably provided inside the suction chamber, and one end of the movable column is connected to the suction cylinder through a connecting pipe.

[0008] Furthermore, the transmission mechanism includes a main bevel tooth and two groups of auxiliary bevel teeth, the two groups of auxiliary bevel teeth are respectively meshed on the left and right sides of the main bevel teeth, the auxiliary bevel teeth are fixedly connected to the rotating teeth through a connecting shaft, and the opposite sides of the two groups of rotating teeth are meshed with a meshing rod, and the meshing rod is fixedly connected to one side of the piston ring.

[0009] Furthermore, the main bevel gear, auxiliary bevel gear, rotating gear and meshing rod are all limited and movable in the movable column by the stabilizing frame, and the movement of the piston ring drives the main bevel gear to rotate in the movable column.

[0010] Furthermore, the retracting mechanism includes a transmission rod and a plurality of pull rods, a roller is fixed on the surface of the transmission rod, and one end of the transmission rod is fixedly connected to the main bevel gear.

[0011] Furthermore, several groups of tie rods are distributed in a circular array about the surface of the sleeve roller, one end of the tie rod is movably connected to the surface of the sleeve roller through a movable seat, and the other end of the tie rod away from the sleeve roller is movably connected to the sealing valve plate through the movable seat.

[0012] Furthermore, two sets of limit seat rods are fixedly connected to the two end positions of one side surface of the sealing valve plate, and the limit seat rods are slidably connected to the first slide groove and the second slide groove through the shaft rod, and an arc-shaped slide groove is extended from the bottom of the second slide groove.

[0013] Furthermore, the first slide groove, the second slide groove and the arc-shaped slide groove are arranged on the end surfaces of the movable column and the base ring close to the valve plate, the center of the arc-shaped slide groove coincides with the center of the bottom end point of the first slide groove, the first slide groove, the second slide groove and the arc-shaped slide groove are distributed in a circular array about the axis of the movable column, and the number of each component is the same as that of the sealing valve plate.

[0014] Furthermore, the cleaning chamber assembly includes a ring sleeve and a cleaning lug, the cleaning lug is fixed inside the ring sleeve, the ring sleeve is fixed inside the stop valve body, inlet and outlet connecting pipes are fixed on both sides of the ring sleeve, and the inlet and outlet connecting pipes are externally connected to the water pipe.

[0015] The beneficial effects of the present invention are: The present invention provides a transmission mechanism and a contraction mechanism. Under the connection between the main bevel gear and the auxiliary bevel gear, the air pressure suction and pushing action of the suction cylinder can directly drive the main bevel gear to rotate, thereby driving the transmission rod to rotate. Under the rotation of the transmission rod, a plurality of sealing valve discs located between adjacent baffle valve plates will contract inward, thereby opening the gap between two adjacent baffle valve plates, so that the liquid in the valve pipe can first flow from between the baffle valve plates into between the baffle valve plates and the sleeve roller, and then flow out from the other end, effectively reducing the pressure of the fluid under the closed state of the sealing valve disc, thereby facilitating the lifting of the movable column, the baffle valve plate and the base ring as a whole from the valve pipe position inside the stop valve body to realize the deployment operation; The present invention provides a retraction mechanism. When the transmission rod drives the sleeve roller to rotate, the pull rod can pull the bottom of the sealing valve plate to provide a lateral pulling force, and one side of the sealing valve plate is limited to slide in the first slide groove and the second slide groove through the limit seat rod, so that the pull rod swings and pulls the sealing valve plate to retract toward the axis of the sleeve roller to realize the opening of the valve plate. In the continuous retraction state, the single group of limit seat rods and the first slide groove move to the maximum position, and the other group of limit seat rods continue to slide in the arc-shaped slide groove at the bottom of the second slide groove, thereby driving the sealing valve plate to deflect at an angle as a whole. In this way, the plurality of sealing valve plates can present an impeller state on the sleeve roller surface. During the movement of the high-pressure fluid, the posture of the sealing valve plate can assist in driving the movable column to rotate at a low speed as a whole, and cooperate with the pulling effect of the electric cylinder. Compared with the direct pulling of the prior art, the movable column in the rotating posture can better facilitate the realization of rising and falling, thereby further facilitating the realization of the opening and closing operation. The cleaning chamber assembly is arranged inside the stop valve body. When the actuator electric cylinder drives the baffle plate and the sealing valve disc to move to the inner side of the ring sleeve, the inlet and outlet connecting pipes can pass high-pressure cleaning liquid into the ring sleeve. The cleaning liquid can clean the surface of the baffle plate and the sealing valve disc. When the sealing valve disc presents an impeller posture, it can also drive the movable column to rotate as a whole, thereby flushing various surfaces between the baffle plate and the sleeve roller, and cooperating with the cleaning protrusion to brush the outer surface of the sealing valve disc, the sealing valve disc and the baffle valve plate are cleaned, and the dirt is prevented from existing for a long time, which makes it inconvenient for the subsequent actuator electric cylinder to pull the driving plate and the rotating component to move up and down for opening and closing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] In the attached picture: Figure 1 The present invention provides an anti-stuck structure and a schematic diagram of the overall structure of a Y-type bonnetless pneumatic stop valve.

[0018] Figure 2This is a schematic diagram of the disassembly of an anti-stuck structure and a Y-type bonnetless pneumatic stop valve rotating assembly connection structure proposed by the present invention.

[0019] Figure 3 The present invention provides an anti-stuck structure and a semi-section structure schematic diagram of a movable column of a Y-type bonnetless pneumatic stop valve.

[0020] Figure 4 The present invention provides an anti-stuck structure and a schematic diagram of the planar structure of the contraction mechanism of a Y-type bonnetless pneumatic stop valve.

[0021] Figure 5 The present invention provides an anti-stuck structure and a half-section structure schematic diagram of a Y-type pneumatic stop valve body without a bonnet.

[0022] Figure 6 This is a schematic diagram of a half-section structure of an anti-stuck structure and a Y-type bonnetless pneumatic stop valve cleaning chamber assembly proposed by the present invention.

[0023] Figure 7 The invention provides an anti-stuck structure and a Y-type pneumatic stop valve without a valve cover. Figure 3 A magnified schematic diagram of the structure at point A.

[0024] Figure 8 The invention provides an anti-stuck structure and a Y-type pneumatic stop valve without a valve cover. Figure 5 Enlarged schematic diagram of the structure at point B.

[0025] In the figure: 1. stop valve body; 2. actuator cylinder; 3. suction cylinder; 4. driving plate; 5. rotating assembly; 6. transmission mechanism; 7. contraction mechanism; 8. sealing valve plate; 9. cleaning chamber assembly; Movable column; 52, valve plate; 53, base ring; 54, suction chamber; 55, piston ring; 61, main bevel gear; 62, auxiliary bevel gear; 63, rotating gear; 64, stabilizing frame; 65, meshing rod; 71, transmission rod; 72, sleeve roller; 73, pull rod; 74, limit seat rod; 75, first slide groove; 76, second slide groove; 77, arc slide groove; 91, ring sleeve; 92, cleaning lug; 93, inlet and outlet connecting pipe. DETAILED DESCRIPTION

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0027] refer to Figure 1-Figure 8, comprising a stop valve body 1, the top of which is fixedly connected with an actuating electric cylinder 2 and a suction cylinder 3, the actuating electric cylinder 2 drives a driving plate 4 to slide in a cavity at the top of the stop valve body 1, the driving plate 4 is movably connected with a rotating assembly 5 through a pressure bearing, a transmission mechanism 6 is arranged inside the rotating assembly 5, and the transmission mechanism 6 drives a sealing valve plate 8 to swing below the rotating assembly 5 through a contraction mechanism 7; The number of the sealing valve plates 8 is several groups, and the several groups of sealing valve plates 8 are distributed in a ring array about the axis of the rotating component 5; A cleaning chamber assembly 9 is also provided inside the stop valve body 1 . The cleaning chamber assembly 9 is coaxial with the rotating assembly 5 . The rotating assembly 5 drives the sealing valve plate 8 to move to the position of the cleaning chamber assembly 9 so as to clean the surface of the sealing valve plate 8 .

[0028] In this embodiment, the stop valve body 1 is Y-shaped as a whole, and an actuator cylinder 2 and a suction cylinder 3 are fixed on the top thereof. The actuator cylinder 2 is used to directly drive the driving plate 4 to slide in the internal cavity of the stop valve body 1, mainly to drive the bottom rotating component 5 to achieve the effect of moving up and down, and the suction cylinder 3 can be connected to the top of the rotating component 5 through the through hole of the driving plate 4 to suck the rotating component 5, and the pneumatic effect is changed from driving the valve plate to move up and down to other motion effects, thereby cooperating with the actuator cylinder 2 to drive the valve plate to move up and down; The driving plate 4 and the rotating assembly 5 are movably connected by a pressure bearing, which can satisfy the rotation effect between the driving plate 4 and the rotating assembly 5, and satisfy the movable effect of the rotating assembly 5 under pressure. After the suction cylinder 3 sucks the inside of the rotating assembly 5, the pressure can drive the contraction mechanism 7 to move under the rotating assembly 5 through the transmission mechanism 6, thereby driving a plurality of groups of sealing valve plates 8 to telescopically swing on the surface below the rotating assembly 5. In this way, the sealing valve plates 8 can expand the surface of the rotating assembly 5 after contraction, and the liquid at the valve pipe orifice position inside the stop valve body 1 can directly flow to one side through the rotating assembly 5 to achieve the purpose of initial circulation. This effect can greatly reduce the lateral fluid pressure on the rotating assembly 5 as a whole, thereby facilitating the execution of the electric cylinder 2 pulling the rotating assembly 5 to move upward to open the valve pipe orifice position. During the upward movement of the rotating component 5, the sealing valve plate 8 on its surface will move to the position of the cleaning chamber component 9. The cleaning chamber component 9 can then flush the sealing valve plate 8 and the surface of the rotating component 5 to prevent the stains on the sealing valve plate 8 and the surface of the rotating component 5 from affecting the subsequent normal opening and closing operations.

[0029] refer to Figure 2 and Figure 3The rotating assembly 5 includes a movable column 51, a plurality of valve plates 52 and a base ring 53. The plurality of valve plates 52 are fixed between the movable column 51 and the base ring 53. The number of valve plates 52 is the same as the sealing valve plates 8 and the valve plates 52 are distributed in a circular array about the axis of the movable column 51. A single sealing valve plate 8 is arranged between two adjacent valve plates 52, and the two side surfaces of the sealing valve plates 8 are in bevel sealing contact with the valve plates 52. A suction chamber 54 is also provided inside the movable column 51. A piston ring 55 is sealed and slidably disposed inside the suction chamber 54. One end of the movable column 51 is connected to the suction cylinder 3 through a connecting pipe.

[0030] In this embodiment, the number of the baffle plates 52 is the same as the sealing valve disc 8, and they are staggered and arranged in pairs. At the same time, the contact surface between the sealing valve disc 8 and the baffle plate 52 is an inclined surface, so that when the sealing valve disc 8 expands outward, the inclined surface contacts the baffle plate 52, and can achieve a better sealing effect under the action of pressure, thereby achieving the basic purpose of cutoff. Similarly, after the sealing valve disc 8 contracts inward, the liquid can enter between the baffle plate 52 and the sleeve roller 72 through the gap between the baffle plates 52, and then flow out from the other side. In this way, the pressure of the liquid on the baffle plate 52 will be greatly reduced, so that the rotating component 5 as a whole is driven up by the actuator cylinder 2; A suction chamber 54 is opened inside the movable column 51, and the center position of the top of the movable column 51 is connected with the connecting pipe of the suction cylinder 3. At the same time, the top of the movable column 51 is movably connected with the driving plate 4 through a bearing, and can be connected with the suction cylinder 3 under the state of satisfying the rotation effect. In this way, when the suction cylinder 3 sucks the air inside the suction chamber 54, the negative pressure will drive the piston ring 55 to move inside the suction chamber 54, thereby driving the meshing rod 65 to move, and vice versa, the piston ring 55 drives the meshing rod 65 to push in the opposite direction.

[0031] refer to Figure 3 and Figure 7 The transmission mechanism 6 includes a main bevel gear 61 and two sets of auxiliary bevel gears 62. The two sets of auxiliary bevel gears 62 are respectively meshed on the left and right sides of the main bevel gear 61. The auxiliary bevel gear 62 is fixedly connected to the rotating gear 63 through a coupling. The opposite side of the two sets of rotating gears 63 meshes with a meshing rod 65, and the meshing rod 65 is fixedly connected to one side of the piston ring 55. The main bevel gear 61, the auxiliary bevel gear 62, the rotating gear 63 and the meshing rod 65 are all limited and movable in the movable column 51 through the stabilizing frame 64. The movement of the piston ring 55 drives the main bevel gear 61 to rotate in the movable column 51.

[0032] In this embodiment, the meshing rod 65 can drive the rotating tooth 63 meshing with it to rotate during the movement. The rotating tooth 63 is fixed to the auxiliary bevel tooth 62 through the connecting shaft, thereby realizing the rotation of the auxiliary bevel tooth 62. The two groups of meshing rods 65 correspond to the transmission of the two groups of auxiliary bevel teeth 62. Under the joint action of the two groups of auxiliary bevel teeth 62, the main bevel tooth 61 can produce a stable rotation effect, thereby driving the rotation of the subsequent transmission rod 71, thereby converting the telescopic movement effect of the piston ring 55 into the rotation effect of the transmission rod 71.

[0033] refer to Figure 2 , Figure 4 and Figure 8 The contraction mechanism 7 includes a transmission rod 71 and a plurality of pull rods 73. The surface of the transmission rod 71 is fixed with a sleeve roller 72, and one end of the transmission rod 71 is fixedly connected to the main bevel gear 61. The plurality of pull rods 73 are distributed in a ring array with respect to the surface of the sleeve roller 72. One end of the pull rod 73 is movably connected to the surface of the sleeve roller 72 through a movable seat, and the other end of the pull rod 73 away from the sleeve roller 72 is movably connected to the sealing valve plate 8 through a movable seat. Two sets of limit seat rods 74 are also fixedly connected to the two ends of the surface of one side of the sealing valve plate 8, respectively. The limit seat rods 74 are slidably connected to the first slide groove 75 and the second slide groove 76 through a shaft rod, and an arc-shaped slide groove 77 is also extended from the bottom of the second slide groove 76. The first slide groove 75, the second slide groove 76 and the arcuate slide groove 77 are arranged on the end surfaces of the movable column 51 and the base ring 53 close to the valve plate 52. The center of the arcuate slide groove 77 coincides with the center of the bottom end point of the first slide groove 75. The first slide groove 75, the second slide groove 76 and the arcuate slide groove 77 are distributed in a circular array about the axis of the movable column 51, and the number of each component is the same as that of the sealing valve plate 8.

[0034] In this embodiment, the transmission rod 71 can synchronously drive the sleeve roller 72 to rotate between the movable column 51 and the base ring 53 during the rotation process. The surface of the sleeve roller 72 drives the bottom of the pull rod 73 to move to one side through the movable seat. During the movement, the top of the pull rod 73 drives the sealing valve plate 8 to move through the movable effect between the sealing valve plate 8, so that it is separated from the valve plate 52. The bottom of the sealing valve disc 8 slides through the limiting seat rod 74 and the movable column 51 and the first slide groove 75 and the second slide groove 76 on the surface of the base ring 53, thereby limiting the movement direction of the sealing valve disc 8, so that the pulling of the pull rod 73 will drive the sealing valve disc 8 to move along the axial position of the transmission rod 71, thereby achieving a contraction effect. When the sealing valve disc 8 opens the gap between the two adjacent groups of baffle plates 52, the fluid will enter from the pipe port side of the stop valve body 1 to between the baffle plate 52 and the sleeve roller 72, and then flow out from the baffle plate 52 on the other side of the sleeve roller 72, thereby achieving a flow effect of a small flow rate; When the locking cam 75 is in the action state, the locking cam 73 is in the action state of being lifted up and the locking cam 76 is in the action state, so that the locking cam 73 can be loosened and the locking cam 76 can be turned to the left and right sides of the locking cam 74. Figure 8 When the high-pressure fluid flows between the valve plate 52 and the roller 72, the liquid pressure acts on the surface of the sealing valve plate 8, so that the sealing valve plate 8 drives the roller 72 to reverse; At this time, returning to the previous implementation scheme of the transmission mechanism 6, due to the engagement of the meshing rod 65 with the rotating teeth 63, a negative pressure state is present in the suction chamber 54, so that the positions of the rotating teeth 63 and the meshing rod 65 are fixed, so that the reversal of the transmission rod 71 will drive the rotating component 5 as a whole to rotate inside the stop valve body 1. At this time, the rotating component 5 is pulled by the execution electric cylinder 2. Compared with the traditional direct pulling method, this effect can help to achieve the separation between the movable column 51, the base ring 53 or the baffle plate 52 and the inner wall of the stop valve body 1, thereby making it easier to pull the movable column 51. This situation is mostly applicable when the surface of the movable column 51, the base ring 53 or the baffle valve plate 52 is stained, resulting in the actual opening and closing process being not smooth, thereby preventing the rotating component 5 from getting stuck inside the stop valve body 1.

[0035] refer to Figure 5 and Figure 6 The cleaning chamber assembly 9 includes a ring sleeve 91 and a cleaning convex piece 92. The cleaning convex piece 92 is fixed inside the ring sleeve 91. The ring sleeve 91 is fixed inside the stop valve body 1. Inlet and outlet connecting pipes 93 are fixed on both sides of the ring sleeve 91 respectively. The inlet and outlet connecting pipes 93 are externally connected to the water pipe.

[0036] In the present embodiment, when the baffle plate 52 is pulled to a position close to the cleaning chamber assembly 9, cleaning liquid can be flushed into the inlet and outlet connecting pipes 93, and the cleaning liquid can be used to flush the outer surface of the baffle plate 52 and the sealing valve plate 8 inside the ring sleeve 91. At the same time, the sealing valve plate 8 can be expanded in cooperation with the suction of the suction cylinder 3, so that the cleaning liquid can flush the inner space of the baffle plate 52, and cooperate with the cleaning protrusion 92 to achieve a better cleaning effect.

[0037] Working principle: Under normal circumstances, the rotating assembly 5 closes the flow port inside the stop valve body 1 to achieve normally closed stop. When the valve port needs to be vented, the suction cylinder 3 first sucks the air inside the suction chamber 54 through the connecting pipe. The negative pressure inside the suction chamber 54 will drive the piston ring 55 to slide. During this process, the piston ring 55 and the meshing rod 65 move synchronously to realize the rotation of the rotating tooth 63. The rotating tooth 63 is fixed to the auxiliary bevel gear 62 through the connecting rod. After the auxiliary bevel gear 62 rotates, it will drive the main bevel gear 61 to rotate. The auxiliary bevel gear 62 is fixed to the transmission rod 71. The transmission rod 71 and the sleeve roller 72 are fixed so that the sleeve roller 72 will rotate at the inner side of the valve plate 52 below the movable column 51; Subsequently, the outer surface of the sleeve roller 72 drives the pull rod 73 to move through the limit seat. The pull rod 73 pulls the bottom of the sealing valve plate 8. At the same time, the sealing valve plate 8 slides in the first slide groove 75 and the second slide groove 76 through the limit seat rod 74 until the sealing valve plate 8 is completely retracted inward, opening the openings of the two adjacent groups of valve plates 52. At this time, a small part of the fluid passes through the valve plate 52 into the space between the valve plate 52 and the sleeve roller 72, and then flows out from the port of the valve plate 52 on the other side of the sleeve roller 72, achieving preliminary connection. At this time, the fluid pressure becomes smaller; The air pressure in the suction chamber 54 inside the movable column 51 is continuously sucked by the suction cylinder 3. At this time, the sealing valve plate 8 is pulled by the pull rod 73, which will cause the single set of limiting seat rods 74 to move inside the arc-shaped slide groove 77, so that the sealing valve plate 8 as a whole is obliquely distributed on the surface of the sleeve roller 72. Under the synchronous movement of multiple sets of sealing valve plates 8, the sleeve roller 72 and the sealing valve plate 8 form a shape similar to an impeller. When the fluid pressure passes through the surface of the sealing valve plate 8, it will drive the movable column 51, the valve plate 52 and the base ring 53 to rotate as a whole at the bottom of the driving plate 4. At this time, the execution electric cylinder 2 pulls the driving plate 4. The driving plate 4 is limited by the bearing and the rotating component 5, so that the rotating component 5 is synchronously pulled upward in the internal cavity of the shut-off valve body 1 during the low-speed rotation until the valve port inside the shut-off valve body 1 is opened.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anti-stuck structure and a Y-type bonnetless pneumatic stop valve, characterized in that: The invention comprises a stop valve body (1), the top of which is fixedly connected to an actuating electric cylinder (2) and a suction cylinder (3), the actuating electric cylinder (2) drives a driving plate (4) to slide in a cavity at the top of the stop valve body (1), the driving plate (4) is movably connected to a rotating assembly (5) via a pressure bearing, a transmission mechanism (6) is provided inside the rotating assembly (5), and the transmission mechanism (6) drives a sealing valve plate (8) to swing below the rotating assembly (5) via a contraction mechanism (7); The number of the sealing valve plates (8) is a plurality of groups, and the plurality of groups of sealing valve plates (8) are distributed in a ring array about the axis of the rotating component (5); A cleaning chamber assembly (9) is also provided inside the stop valve body (1), wherein the cleaning chamber assembly (9) is coaxial with the rotating assembly (5), and the rotating assembly (5) drives the sealing valve plate (8) to move to the position of the cleaning chamber assembly (9) so as to clean the surface of the sealing valve plate (8).

2. The anti-stuck structure and Y-type bonnetless pneumatic stop valve according to claim 1, characterized in that: The rotating assembly (5) comprises a movable column (51), a plurality of groups of baffle valve plates (52) and a base ring (53); the plurality of groups of baffle valve plates (52) are fixed between the movable column (51) and the base ring (53); the number of baffle valve plates (52) is the same as the number of sealing valve plates (8), and the baffle valve plates (52) are distributed in a ring array about the axis of the movable column (51); a single group of sealing valve plates (8) is arranged between two adjacent groups of baffle valve plates (52), and the two side surfaces of the sealing valve plates (8) are in bevel sealing contact with the baffle valve plates (52).

3. The anti-stuck structure and Y-type bonnetless pneumatic stop valve according to claim 2, characterized in that: A suction chamber (54) is also provided inside the movable column (51), a piston ring (55) is sealingly slidably disposed inside the suction chamber (54), and one end of the movable column (51) is connected to the suction cylinder (3) via a connecting pipe.

4. The anti-stuck structure and Y-type bonnetless pneumatic stop valve according to claim 3, characterized in that: The transmission mechanism (6) comprises a main bevel tooth (61) and two groups of auxiliary bevel teeth (62), the two groups of auxiliary bevel teeth (62) respectively meshing with the left and right sides of the main bevel tooth (61), the auxiliary bevel teeth (62) being fixedly connected to the rotating teeth (63) via a connecting shaft, the opposite sides of the two groups of rotating teeth (63) being meshing with a meshing rod (65), the meshing rod (65) being fixedly connected to one side of the piston ring (55).

5. The anti-stuck structure and Y-type bonnetless pneumatic stop valve according to claim 4, characterized in that: The main bevel gear (61), the auxiliary bevel gear (62), the rotating gear (63) and the meshing rod (65) are all limited and movable in the movable column (51) by a stabilizing frame (64); the piston ring (55) moves to drive the main bevel gear (61) to rotate in the movable column (51).

6. The anti-stuck structure and Y-type bonnetless pneumatic stop valve according to claim 1, characterized in that: The retracting mechanism (7) comprises a transmission rod (71) and a plurality of pull rods (73); a roller (72) is fixed on the surface of the transmission rod (71); and one end of the transmission rod (71) is fixedly connected to the main bevel gear (61).

7. The anti-stuck structure and Y-type bonnetless pneumatic stop valve according to claim 6, characterized in that: A plurality of groups of tie rods (73) are distributed in a ring array about the surface of the sleeve roller (72), one end of the tie rod (73) is movably connected to the surface of the sleeve roller (72) via a movable seat, and the other end of the tie rod (73) away from the sleeve roller (72) is movably connected to the sealing valve plate (8) via the movable seat.

8. The anti-stuck structure and Y-type bonnetless pneumatic stop valve according to claim 7, characterized in that: Two sets of limit seat rods (74) are fixedly connected to the two ends of the surface of one side of the sealing valve plate (8), respectively. The limit seat rods (74) are slidably connected to the first slide groove (75) and the second slide groove (76) through an axle rod, and an arc-shaped slide groove (77) is extended from the bottom of the second slide groove (76).

9. The anti-stuck structure and Y-type bonnetless pneumatic stop valve according to claim 8, characterized in that: The first slide groove (75), the second slide groove (76) and the arc-shaped slide groove (77) are arranged on the end surfaces of the movable column (51) and the base ring (53) close to the valve plate (52); the center of the arc-shaped slide groove (77) coincides with the center of the bottom end of the first slide groove (75); the first slide groove (75), the second slide groove (76) and the arc-shaped slide groove (77) are arranged in a circular array about the axis of the movable column (51); and the number of each component is the same as that of the sealing valve plate (8).

10. The anti-stuck structure and Y-type bonnetless pneumatic stop valve according to claim 1, characterized in that: The cleaning chamber assembly (9) comprises a ring sleeve (91) and a cleaning lug (92), wherein the cleaning lug (92) is fixed inside the ring sleeve (91), and the ring sleeve (91) is fixed inside the stop valve body (1). Inlet and outlet connecting pipes (93) are respectively fixed on both sides of the ring sleeve (91), and the inlet and outlet connecting pipes (93) are externally connected to a water inlet pipe.

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