Cantilever closed valve

Abstract

The invention relates to the technical field of closed valves, in particular to a cantilever closed valve which comprises a valve body, a driving structure, a limiting structure, an overhauling structure, a fixing structure and a supporting structure. The driving structure is used in cooperation with the limiting structure, opening and closing of the closed valve are conveniently controlled, meanwhile, the opening degree of the closed valve is freely controlled through the limiting structure, the problem that the closed valve is accidentally closed under the action of external force such as vibration is solved, and stability is improved; the arrangement of the overhauling structure facilitates quick overhauling of parts in the valve body or addition of lubricating oil, the problem that the whole airtight valve is troublesome to disassemble and operate is avoided, the operation efficiency is improved, the arrangement of the fixing structure facilitates preliminary fixing of the valve body when the airtight valve is installed, and the practicability is high. The problem that the valve body needs to be lifted all the time during installation is avoided, the operation process is simplified, the flexibility is high, the valve body is conveniently supported through the arrangement of the supporting structure, the pressure at the joint of the valve body and the pipeline is reduced, and the stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of airtight valves, in particular to a cantilever airtight valve. Background Art

[0002] A closed valve is a valve used in a pipeline system. Its main function is to prevent gas or liquid from leaking from the pipeline while maintaining a stable pressure inside the pipeline. The cantilever closed valve is a closed valve with a special structure, which is often used in the chemical industry, oil and gas field, environmental protection field and other places.

[0003] When repairing the internal transmission components of traditional sealed valves or adding lubricant to the transmission components, the sealing valve is usually removed from the pipeline as a whole, and then repair or add lubricant. However, when removing, the bolts need to be repeatedly installed and removed, resulting in low operating efficiency and poor flexibility. When the sealing valve is installed as a whole between two pipes, it is usually fixedly connected by a flange. During installation, due to the action of gravity, the operator needs to always lift the sealing valve and align it with the pipe mouth, and then install it with bolts. As a result, the sealing valve is easy to fall during installation, has poor stability, and is inconvenient to operate; In order to prevent the sealing valve from being accidentally closed due to factors such as vibration during use, a pin is usually set on the connecting rod mechanism to maintain the position of the valve plate. However, since the position of the pin is constant, when the opening size of the sealing valve needs to be adjusted, it is difficult to always limit the connecting rod structure due to the fixed position of the pin, which can easily cause the sealing valve to be accidentally closed under external force factors, resulting in poor flexibility. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a cantilever sealed valve.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a cantilever closed valve, comprising a valve body, a driving structure installed on the valve body, a limiting structure connected to the driving structure, an inspection structure installed on the valve body, a fixing structure connected to the valve body, and a supporting structure arranged on the valve body; The maintenance structure includes a support seat and a screw rod rotatably connected to the support seat, a support seat is fixedly connected to the outer wall of the valve body, a guide rod is fixedly connected to the support seat, two sliders are slidably connected to the support seat, one of the sliders is threadedly connected to the screw rod, and the other slider is slidably connected to the guide rod, a fourth rotating shaft is fixedly connected between the two sliders, a sealing cover is rotatably connected to the fourth rotating shaft, a rubber plug is fixedly connected to the inner side of the sealing cover, the rubber plug is slidably connected to the inner wall of the support seat, and the rubber plug is slidably connected to the inner wall of the valve body.

[0006] Specifically, two positioning rods are fixedly connected inside the support seat, and the positioning rods and the sealing cover are engaged with each other. A first limit strip is slidably connected to the support seat, and a first tension spring is fixedly connected between the first limit strip and the outer wall of the support seat. The end of the first limit strip is provided with a slope, and a driving hole is opened at the top of the screw rod.

[0007] Specifically, the cross section of the support seat is in a "U"-shaped structure, and a circular structure is formed between the rubber plug and the valve body.

[0008] The cam is connected with the valve body by the spring, and the cam is connected with the valve stem by the spring, and the cam is connected with the valve body by the spring.

[0009] Specifically, a rotating handle is fixedly connected to the end of the valve stem, and the rotating handle is rotatably connected to the valve cover.

[0010] Specifically, the limiting structure includes a guide groove and a plurality of limiting holes opened inside the guide groove. A guide groove is opened on a side of the valve cover close to the outer side. A limiting rod is slidably connected to the rotating handle. The bottom of the limiting rod is engaged in the limiting hole. A first spring is fixedly connected between the limiting rod and the rotating handle.

[0011] Specifically, a limit seat is fixedly connected to the outer wall of the rotating handle, a limit slot is provided on the limit seat, a sliding slot is provided on the limit slot, a rotating bar is rotatably connected to the top of the limit rod, the rotating bar is rotatably connected to the limit seat, a stop block is fixedly connected to the inner side of the rotating bar, and the stop block is slidably connected to the limit slot and the sliding slot respectively.

[0012] Specifically, the fixed structure includes a rotating seat and two fifth rotating shafts fixedly connected to the rotating seat, the valve body is fixedly connected to three rotating seats, a rotating frame is rotatably connected between the two fifth rotating shafts, two sliding rods are slidably connected to the rotating frame, a pressure plate is fixedly connected between the two sliding rods, a second spring is fixedly connected between the pressure plate and the rotating frame, a knob is threadedly connected to one of the sliding rods, and the upper surface of the knob is in conflict with the rotating seat.

[0013] Specifically, the rotating frame is in a "U"-shaped structure, and the sliding rod is in a "T"-shaped structure.

[0014] Specifically, the supporting structure includes a mounting seat and a rotating rod rotatably connected to the mounting seat, the mounting seat is fixedly connected to the outer wall of the valve body, the interior of the rotating rod is slidably connected to a cantilever, a plurality of slots are provided on the cantilever, a second limit strip is slidably connected to the rotating rod, a second tension spring is fixedly connected between the second limit strip and the outer wall of the rotating rod, an end of the second limit strip is engaged with the slot, a sixth rotating shaft is rotatably connected to the end of the cantilever, a mounting plate is rotatably connected to the sixth rotating shaft, a nut is threadedly connected to the sixth rotating shaft, and the nut and the outer wall of the cantilever are in conflict with each other.

[0015] The beneficial effects of the present invention are: The cantilever sealed valve described in the present invention has a driving structure on the valve body, and a limiting structure on the driving structure. The driving structure is used in conjunction with the limiting structure, thereby facilitating the control of the opening and closing of the sealed valve. At the same time, the size of the opening of the sealed valve can be arbitrarily controlled through the limiting structure, thereby avoiding the problem of accidental closing of the sealed valve under the action of external forces such as vibration, and improving stability.

[0016] The cantilever sealed valve described in the present invention has a maintenance structure installed on the valve body. The arrangement of the maintenance structure facilitates quick maintenance of parts inside the valve body or addition of lubricating oil, avoids the problem of troublesome operation of dismantling the sealed valve as a whole, and improves operating efficiency.

[0017] The cantilever sealed valve described in the present invention has a fixed structure connected to the valve body. The setting of the fixed structure facilitates the initial fixation of the valve body when installing the sealed valve, avoiding the problem of always lifting the valve body during installation, simplifying the operation process, and having strong flexibility.

[0018] The cantilever sealed valve described in the present invention has a valve body provided with a supporting structure. The arrangement of the supporting structure facilitates the support of the valve body, reduces the pressure at the connection between the valve body and the pipeline, and improves stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of a cantilever sealed valve provided by the present invention; Figure 2 for Figure 1 An enlarged schematic diagram of the structure of section A is shown; Figure 3 for Figure 1 An enlarged schematic diagram of the structure of part B is shown; Figure 4 for Figure 1 An enlarged schematic diagram of the C-section structure is shown; Figure 5 It is a schematic diagram of the connection structure between the valve seat and the valve cover of the present invention; Figure 6 for Figure 5 An enlarged schematic diagram of the D-section structure is shown; Figure 7 It is a schematic diagram of the connection structure between the mounting base and the rotating rod of the present invention; Figure 8 It is a schematic diagram of the connection structure between the sealing ring and the valve plate of the present invention; Fig. 9 It is a schematic diagram of the connection structure between the fourth rotating shaft and the sealing cover of the present invention.

[0021] In the figure: 1. valve body; 2. driving structure; 201. valve seat; 202. valve cover; 203. valve stem; 204. connecting seat; 205. mounting frame; 206. first rotating shaft; 207. rotating plate; 208. second rotating shaft; 209. rotating block; 210. third rotating shaft; 211. positioning plate; 212. positioning strip; 213. valve plate; 214. sealing ring; 215. rotating handle; 3. limiting structure; 301. guide groove; 302. limiting hole; 303. limiting rod; 304. first spring; 305. limiting seat; 306. limiting groove; 307. slide groove; 308. rotating strip; 309. stopper; 4. maintenance structure; 401. support Seat; 402, screw rod; 403, slider; 404, guide rod; 405, fourth rotating shaft; 406, sealing cover; 407, first limit strip; 408, first tension spring; 409, driving hole; 410, positioning rod; 411, rubber plug; 5, fixing structure; 501, rotating seat; 502, fifth rotating shaft; 503, rotating frame; 504, sliding rod; 505, pressure plate; 506, second spring; 507, knob; 6, supporting structure; 601, mounting seat; 602, rotating rod; 603, cantilever; 604, slot; 605, second limit strip; 606, second tension spring; 607, sixth rotating shaft; 608, mounting plate; 609, nut. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] like Figure 1 , Figure 8 and Fig. 9As shown, a cantilever sealed valve described in the present invention comprises a valve body 1, a driving structure 2 installed on the valve body 1, a limiting structure 3 connected to the driving structure 2, an inspection structure 4 installed on the valve body 1, a fixed structure 5 connected to the valve body 1, and a supporting structure 6 arranged on the valve body 1; the inspection structure 4 comprises a support seat 401 and a screw rod 402 rotatably connected to the support seat 401, the support seat 401 is fixedly connected to the outer wall of the valve body 1, the support seat 401 is fixedly connected to a guide rod 404, and two sliders 403 are slidably connected to the support seat 401, one of the sliders 403 is threadedly connected to the screw rod 402, the other slider 403 is slidably connected to the guide rod 404, a fourth rotating shaft 405 is fixedly connected between the two sliders 403, and the A sealing cover 406 is rotatably connected to the fourth rotating shaft 405, and a rubber plug 411 is fixedly connected to the inner side of the sealing cover 406. The rubber plug 411 is slidably connected to the inner wall of the support seat 401, and the rubber plug 411 is slidably connected to the inner wall of the valve body 1. Two positioning rods 410 are fixedly connected to the inside of the support seat 401, and the positioning rods 410 and the sealing cover 406 are mutually engaged. A first limiting strip 407 is slidably connected to the support seat 401, and a first tension spring 408 is fixedly connected between the first limiting strip 407 and the outer wall of the support seat 401, and an inclined surface is provided at the end of the first limiting strip 407. A driving hole 409 is opened on the top of the screw rod 402. The cross section of the support seat 401 is a "U"-shaped structure, and a circular structure is formed between the rubber plug 411 and the valve body 1;When the internal components of the sealed valve are damaged and need to be repaired or lubricated, it is only necessary to close the valve plate 213 first, and then rotate the screw rod 402 on the support seat 401 through the drive hole 409, so that the screw rod 402 drives the slider 403 and the fourth shaft 405 to slide outward, and the fourth shaft 405 drives the slider 403 at the other end to slide outward along the guide rod 404. The setting of the guide rod 404 enhances the stability of the slider 403. At this time, the fourth shaft 405 drives the sealing cover 406 to The sealing cover 406 slides outward, and at the same time, the sealing cover 406 drives the inner rubber plug 411 to slide out from the inner wall of the valve body 1 until the sealing cover 406 and the positioning rod 410 are no longer engaged. One hand pulls the sealing cover 406 through the handle on the sealing cover 406, and the other hand pulls the first limiting strip 407 outward to rotate the sealing cover 406 90 degrees around the fourth rotating shaft 405, and then releases the first limiting strip 407. The first limiting strip 407 slides to the original position under the reset action of the first tension spring 408. The sealing cover 406 is prevented from interfering with the sealing cover 406 under the action of external force when overhauling or adding lubricating oil, thereby affecting the operation of the operator. After the overhaul or the addition of lubricating liquid is completed, the sealing cover 406 only needs to be pressed in the direction of the positioning rod 410. Since the end of the first limiting strip 407 is provided with an inclined surface, the sealing cover 406 and the inclined surface are slidably matched to drive the first limiting strip 407 to slide outward. At this time, the first limiting strip 407 no longer blocks the rotation of the sealing cover 406. When the sealing cover 406 is rotated to the initial position, one hand presses the sealing cover 406 to align the groove at the end of the sealing cover 406 with the positioning rod 410, and the other hand uses a hexagonal wrench to rotate the screw rod 402, and then the screw rod 402 drives the sealing cover 406 and the rubber plug 411 to slide inward until the rubber plug 411 is tightly fitted with the inner wall of the valve body 1. At this time, the overhaul of the internal parts of the valve body 1 or the addition of lubricating oil is completed, avoiding the overall removal of the valve body 1, thereby improving the operating efficiency. ;

[0024] Specifically, Figure 1 , Figure 3-Figure 6 and Figure 8As shown, the driving structure 2 includes two valve seats 201 and a valve cover 202 fixedly connected to the valve seats 201, the valve seats 201 are fixedly connected to the outer wall of the valve body 1, a valve stem 203 is rotatably connected between the two valve seats 201, a positioning plate 211 is fixedly connected to the inside of the valve body 1, the valve stem 203 is rotatably connected to the positioning plate 211, a sealing ring 214 is fixedly connected to the inner wall of the valve body 1, a valve plate 213 is provided inside the valve body 1, the valve plate 213 abuts against the sealing ring 214, a connecting seat 204 is fixedly connected to the valve plate 213, and two mounting frames 205 are fixedly connected to the connecting seat 204, and the two mounting frames 205 are fixedly connected to the two mounting frames 20 5 is rotatably connected with a first rotating shaft 206, and both ends of the first rotating shaft 206 are rotatably connected with a rotating plate 207, and the end of the rotating plate 207 is fixedly connected to the valve stem 203 through a positioning strip 212, and the rotating plate 207 is rotatably connected to the positioning plate 211, and a second rotating shaft 208 is rotatably connected between the tops of the two mounting frames 205, and a rotating block 209 is rotatably connected to the second rotating shaft 208, and a third rotating shaft 210 is rotatably connected to the positioning plate 211, and the end of the rotating block 209 is rotatably connected to the third rotating shaft 210, and the end of the valve stem 203 is fixedly connected with a rotating handle 215, and the rotating handle 215 The valve plate 213 inside the valve body 1 needs to be opened after the installation of the airtight valve is completed. The rotating bar 308 on the rotating handle 215 only needs to be rotated so that the rotating bar 308 does not block the rotation of the rotating handle 215. Then, the rotating handle 215 drives the valve stem 203 to rotate on the valve seat 201. The arrangement of the valve cover 202 ensures the sealing between the valve stem 203 and the valve seat 201. Since the center position of the valve stem 203 is fixedly connected to two rotating plates 207 through the positioning bar 212, the valve stem 203 drives the two rotating plates 207 to rotate. At the same time, the two rotating plates 207 drive the mounting frame 205 and the connecting seat 204 to rotate. At this time, since the mounting frame 20 5 is rotatably connected with a rotating block 209 through a second rotating shaft 208, and the rotating block 209 is rotatably connected with the end of the positioning plate 211 through a third rotating shaft 210, and then in the process of the valve stem 203 driving the rotating plate 207 to rotate, the rotating plate 207 will rotate relative to the first rotating shaft 206, and at the same time cooperate with the rotating block 209 and the positioning plate 211 to realize that the connecting seat 204 drives the valve plate 213 to flip in the rotation direction of the rotating plate 207. At this time, the movement trajectory of the valve plate 213 is a specific arc. In this process, the valve plate 213 gradually leaves the sealing ring 214 on the valve body 1, and then the channel area of ​​the valve opening is gradually increased, which is easy to operate and has strong flexibility.

[0025] Specifically, Figure 4-Figure 6As shown, the limiting structure 3 includes a guide groove 301 and a plurality of limiting holes 302 opened inside the guide groove 301. The guide groove 301 is opened on one side of the valve cover 202 close to the outer side. The limiting rod 303 is slidably connected to the rotating handle 215. The bottom of the limiting rod 303 is engaged with the limiting hole 302. A first spring 304 is fixedly connected between the limiting rod 303 and the rotating handle 215. A limiting seat 305 is fixedly connected to the outer wall of the rotating handle 215. A limiting groove 306 is opened on the limiting seat 305. A sliding groove 307 is opened on the limiting groove 306. The limiting rod 303 is fixedly connected to the rotating handle 215. The top of the rotating handle 215 is rotatably connected with a rotating bar 308, and the rotating bar 308 is rotatably connected to the limiting seat 305. The inner side of the rotating bar 308 is fixedly connected with a stopper 309, and the stopper 309 is slidably connected to the limiting groove 306 and the sliding groove 307 respectively; when it is necessary to control the opening size of the valve plate 213, since the limiting rod 303 is provided on the rotating handle 215, and since the bottom of the limiting rod 303 is a truncated cone structure, in the process of rotating the rotating handle 215, the inclined surface at the bottom of the limiting rod 303 slides with the edge of the limiting hole 302, driving the limiting rod 303 to slide upward. The stopper 309 on the upper part of the cam 308 is aligned with the slide groove 307 on the limit seat 305, so that the limit groove 306 does not block the stopper 309 from moving upward, the limit rod 303 drives the rotating bar 308 to slide upward, and the rotating bar 308 drives the stopper 309 to slide upward along the slide groove 307. At the same time, the bottom of the limit rod 303 slides in the guide groove 301, so that the limit rod 303 does not block the rotation of the rotating handle 215. When the rotating handle 215 is rotated to a specified angle, the limit rod 303 is engaged with the corresponding limit hole 302 in the guide groove 301 under the reset action of the first spring 304, and the limit rod 303 is The movable stopper 309 slides back to the inside of the limiting groove 306, and then the rotating bar 308 on the top of the limiting rod 303 is rotated in the opposite direction, so that the rotating bar 308 rotates around the limiting seat 305. At the same time, the rotating bar 308 drives the stopper 309 to slide inside the limiting groove 306, and then the stopper 309 and the rotating bar 308 are restricted from sliding upward under the resistance of the inner wall of the limiting groove 306, thereby effectively preventing the limiting rod 303 from slipping out of the limiting hole 302. At this time, the limiting of the rotating handle 215 is achieved, and the opening size of the valve plate 213 can be adjusted, thereby avoiding the problem of the sealed valve being easily closed accidentally due to vibration factors, and the practicability is strong.

[0026] Specifically, Figure 1 and Figure 2As shown, the fixed structure 5 includes a rotating seat 501 and two fifth rotating shafts 502 fixedly connected to the rotating seat 501, the valve body 1 is fixedly connected with three rotating seats 501, a rotating frame 503 is rotatably connected between the two fifth rotating shafts 502, two sliding rods 504 are slidably connected to the rotating frame 503, a pressure plate 505 is fixedly connected between the two sliding rods 504, a second spring 506 is fixedly connected between the pressure plate 505 and the rotating frame 503, a knob 507 is threadedly connected to one of the sliding rods 504, the upper surface of the knob 507 and the rotating seat 501 are in conflict with each other, the rotating frame 503 is in a "U" shape, and the sliding rod 504 is in a "T" shape. When installing the closed valve, the valve body 1 needs to be installed between two pipes to control the opening and closing of the pipes. At this time, it is only necessary to align a section of the valve body 1 with the rotating seat 501 to the top of the pipe. Since a flange is installed at the pipe interface, when the valve body 1 is installed After aligning the flange, the rotating frame 503 on the three rotating seats 501 is rotated respectively by the fifth rotating shaft 502, so that the rotating frame 503 drives the pressure plate 505 to rotate to the position just above the edge of the flange, and then the two sliding rods 504 are pulled downward, so that the sliding rod 504 drives the pressure plate 505 to move downward until the bottom surface of the pressure plate 505 contacts the flange at the pipeline interface, and at the same time compresses the second spring 506, and then the knob 507 on the sliding rod 504 is rotated again. Due to the threaded connection between the knob 507 and the sliding rod 504, the upper surface of the knob 507 contacts the rotating seat 501, and the pressure plates 505 on the two outer rotating frames 503 repeat the same operation. At this time, the valve body 1 is preliminarily fixed to the pipeline, which is conducive to the subsequent process of fixing the valve body 1 to the pipeline with bolts, avoiding the problem of always lifting the valve body 1 when tightening the bolts, and improving stability. Then the other end of the valve body 1 is fixedly connected to another pipeline by bolts. At this time, the installation of the closed valve is completed, and the operation is simple.

[0027] Specifically, Figure 1 and Figure 7As shown, the support structure 6 includes a mounting seat 601 and a rotating rod 602 rotatably connected to the mounting seat 601, the mounting seat 601 is fixedly connected to the outer wall of the valve body 1, the interior of the rotating rod 602 is slidably connected to a cantilever 603, a plurality of slots 604 are provided on the cantilever 603, a second limit strip 605 is slidably connected to the rotating rod 602, a second tension spring 606 is fixedly connected between the second limit strip 605 and the outer wall of the rotating rod 602, and the second limit strip 605 is fixedly connected to the outer wall of the rotating rod 602. The end of the strip 605 is engaged with the slot 604, and the end of the cantilever 603 is rotatably connected to the sixth shaft 607, and the sixth shaft 607 is rotatably connected to the mounting plate 608, and the sixth shaft 607 is threadedly connected to a nut 609, and the nut 609 and the outer wall of the cantilever 603 are in conflict with each other; after the installation of the closed valve is completed, in order to reduce the pressure of the gravity of the closed valve on the connection, it is only necessary to fix the mounting plate 608 on the valve body 1 to the wall, first according to the valve body 1 and the wall To adjust the outward extension length of the cantilever 603 by adjusting the spacing between them, just pull the second limit bar 605 outward, then pull out the cantilever 603, and when it is adjusted to a suitable length, release the second limit bar 605, and then the second limit bar 605 is engaged with the corresponding card slot 604 on the cantilever 603 under the reset action of the second tension spring 606, at this time, the outward extension length of the cantilever 603 is adjusted, and at the same time, the rotating rod 602 can be adjusted to a suitable direction by rotating it with the mounting seat 601, and then The mounting plate 608 is rotated to a suitable angle through the sixth rotating shaft 607. Since the sixth rotating shaft 607 is a "T"-shaped structure, and one end of the sixth rotating shaft 607 is in contact with the mounting plate 608, and the other end is threadedly connected with a nut 609, it is only necessary to fix the position of the mounting plate 608 by tightening the nut 609. At this time, bolts are used to fix the mounting plate 608 to the wall, thereby supporting the valve body 1, effectively reducing the pressure at the connection between the valve body 1 and the pipeline, and improving stability.

[0028] When the present invention is in use, when installing the airtight valve, the valve body 1 needs to be installed between two pipes to control the opening and closing of the pipes. At this time, it is only necessary to align a section of the valve body 1 with the rotating seat 501 to the top of the pipe. Since a flange is installed at the pipe interface, after the valve body 1 is aligned with the flange, the rotating frames 503 on the three rotating seats 501 are rotated respectively by the fifth rotating shaft 502, so that the rotating frames 503 drive the pressure plate 505 to rotate to a position just above the edge of the flange, and then pull the two sliding rods 504 downward, so that the sliding rods 504 drive the pressure plate 505 to move downward until the bottom of the pressure plate 505 is The upper surface of the knob 507 abuts against the flange at the pipe interface, and the second spring 506 is compressed at the same time. Then the knob 507 on the slide bar 504 is rotated. Since the knob 507 is threadedly connected to the slide bar 504, the upper surface of the knob 507 abuts against the rotating seat 501. At the same time, the pressure plates 505 on the two outer rotating frames 503 repeat the same operation. At this time, the valve body 1 is initially fixed to the pipe, which is conducive to the subsequent process of fixing the valve body 1 to the pipe with bolts, avoiding the problem of always lifting the valve body 1 when tightening the bolts, improving stability, and then the other end of the valve body 1 is fixedly connected to another pipe through bolts. The installation of the airtight valve is completed at this time, and the operation is easy. After the installation of the airtight valve is completed, in order to reduce the pressure of the gravity of the airtight valve on the connection, it is only necessary to fix the mounting plate 608 on the valve body 1 to the wall. First, the length of the cantilever 603 extending outward is adjusted according to the distance between the valve body 1 and the wall. It is only necessary to pull the second limit strip 605 outward, and then pull out the cantilever 603 outward. When it is adjusted to a suitable length, the second limit strip 605 is released, and then the second limit strip 605 is engaged with the corresponding slot 604 on the cantilever 603 under the resetting action of the second tension spring 606. At this time, the cantilever 603 is extended outward. The length can be adjusted, and the rotating rod 602 can be adjusted to a suitable direction by rotating with the mounting seat 601. When the mounting plate 608 is rotated to a suitable angle through the sixth rotating shaft 607, since the sixth rotating shaft 607 is a "T"-shaped structure, and one end of the sixth rotating shaft 607 is in contact with the mounting plate 608, and the other end is threadedly connected with a nut 609, it is only necessary to fix the position of the mounting plate 608 by tightening the nut 609. At this time, bolts are used to fix the mounting plate 608 to the wall, thereby supporting the valve body 1, effectively reducing the pressure at the connection between the valve body 1 and the pipeline, and improving stability; After the installation of the sealed valve is completed, the valve plate 213 inside the valve body 1 needs to be opened. It is only necessary to first rotate the rotating bar 308 on the rotating handle 215 so that the rotating bar 308 does not block the rotating handle 215 from rotating, and then the rotating handle 215 drives the valve stem 203 to rotate on the valve seat 201. The arrangement of the valve cover 202 ensures the sealing between the valve stem 203 and the valve seat 201. Since the center position of the valve stem 203 is fixedly connected to two rotating plates 207 through the positioning bar 212, the valve stem 203 drives the two rotating plates 207 to rotate, and at the same time, the two rotating plates 207 drive the mounting frame 205 and the connecting seat 204 to rotate. At this time, since the top of the mounting frame 205 is rotatably connected to the rotating block 209 through the second rotating shaft 208, and the rotating block 20 9 is rotatably connected between the third rotating shaft 210 and the end of the positioning plate 211, and then in the process of the valve stem 203 driving the rotating plate 207 to rotate, the rotating plate 207 will rotate relative to the first rotating shaft 206, and at the same time cooperate with the rotating block 209 and the positioning plate 211 to realize that the connecting seat 204 drives the valve plate 213 to flip in the rotating direction of the rotating plate 207. At this time, the movement trajectory of the valve plate 213 is a specific arc. In this process, the valve plate 213 gradually leaves the sealing ring 214 on the valve body 1, and then the channel area of ​​the valve opening gradually increases. The operation is simple and the flexibility is strong. When it is necessary to control the size of the valve plate 213 opening, since the limit rod 303 is provided on the rotating handle 215, and since the bottom of the limit rod 303 is The truncated cone-shaped structure, during the process of rotating the rotating handle 215, the inclined surface at the bottom of the limiting rod 303 slides with the edge of the limiting hole 302, driving the limiting rod 303 to slide upward. At this time, the stopper 309 on the rotating bar 308 is aligned with the slide groove 307 provided on the limiting seat 305, and the limiting groove 306 does not block the stopper 309 from moving upward. The limiting rod 303 drives the rotating bar 308 to slide upward, and the rotating bar 308 drives the stopper 309 to slide upward along the slide groove 307. At the same time, the bottom of the limiting rod 303 slides in the guide groove 301, and the limiting rod 303 does not block the rotating handle 215 from rotating. When the rotating handle 215 is rotated to a specified angle, the limiting rod 303 is in the first spring 304. The stopper 309 is locked with the corresponding limit hole 302 in the guide groove 301 under the reset action, and the limit rod 303 drives the stopper 309 to slide into the limit groove 306 again, and then the rotating bar 308 on the top of the limit rod 303 is rotated in the opposite direction to make the rotating bar 308 rotate around the limit seat 305. At the same time, the rotating bar 308 drives the stopper 309 to slide in the limit groove 306, and then the stopper 309 and the rotating bar 308 are restricted from sliding upward under the resistance of the inner wall of the limit groove 306, thereby effectively preventing the limit rod 303 from slipping out of the limit hole 302. At this time, the limit of the rotating handle 215 is realized, and the opening size of the valve plate 213 can be adjusted, thereby avoiding the problem that the sealed valve is easy to close accidentally under vibration factors, and the practicability is strong. When the internal components of the sealed valve are damaged and need to be repaired or lubricated, it is only necessary to close the valve plate 213 first, and then rotate the screw rod 402 on the support seat 401 through the drive hole 409, so that the screw rod 402 drives the slider 403 and the fourth shaft 405 to slide outward, and the fourth shaft 405 drives the slider 403 at the other end to slide outward along the guide rod 404. The setting of the guide rod 404 enhances the stability of the slider 403. At this time, the fourth shaft 405 drives the sealing cover 406 to The sealing cover 406 slides outward, and at the same time, the sealing cover 406 drives the inner rubber plug 411 to slide out from the inner wall of the valve body 1 until the sealing cover 406 and the positioning rod 410 are no longer engaged. One hand pulls the sealing cover 406 through the handle on the sealing cover 406, and the other hand pulls the first limiting strip 407 outward to rotate the sealing cover 406 90 degrees around the fourth rotating shaft 405, and then releases the first limiting strip 407. The first limiting strip 407 slides to the original position under the reset action of the first tension spring 408. The sealing cover 406 is prevented from interfering with the sealing cover 406 under the action of external force when overhauling or adding lubricating oil, thereby affecting the operation of the operator. After the overhaul or the addition of lubricating liquid is completed, the sealing cover 406 only needs to be pressed in the direction of the positioning rod 410. Since the end of the first limiting strip 407 is provided with an inclined surface, the sealing cover 406 and the inclined surface are slidably matched to drive the first limiting strip 407 to slide outward. At this time, the first limiting strip 407 no longer blocks the rotation of the sealing cover 406. When the sealing cover 406 is rotated to the initial position, one hand presses the sealing cover 406 to align the groove at the end of the sealing cover 406 with the positioning rod 410, and the other hand uses a hexagonal wrench to rotate the screw rod 402, and then the screw rod 402 drives the sealing cover 406 and the rubber plug 411 to slide inward until the rubber plug 411 is tightly fitted with the inner wall of the valve body 1. At this time, the overhaul of the internal parts of the valve body 1 or the addition of lubricating oil is completed, avoiding the overall removal of the valve body 1, thereby improving the operating efficiency.

[0029] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cantilever sealed valve, characterized in that: It comprises a valve body (1), a driving structure (2) mounted on the valve body (1), a limiting structure (3) connected to the driving structure (2), an inspection structure (4) mounted on the valve body (1), a fixing structure (5) connected to the valve body (1), and a supporting structure (6) provided on the valve body (1); The inspection structure (4) comprises a support seat (401) and a screw rod (402) rotatably connected to the support seat (401); the support seat (401) is fixedly connected to the outer wall of the valve body (1); the support seat (401) is fixedly connected to a guide rod (404); two sliders (403) are slidably connected to the support seat (401); one of the sliders (403) is threadedly connected to the screw rod (402); the other slider (403) is slidably connected to the guide rod (404); a fourth rotating shaft (405) is fixedly connected between the two sliders (403); a sealing cover (406) is rotatably connected to the fourth rotating shaft (405); a rubber plug (411) is fixedly connected to the inner side of the sealing cover (406); the rubber plug (411) is slidably connected to the inner wall of the support seat (401); and the rubber plug (411) is slidably connected to the inner wall of the valve body (1).

2. A cantilever sealed valve according to claim 1, characterized in that: Two positioning rods (410) are fixedly connected inside the support seat (401), and the positioning rods (410) are engaged with the sealing cover (406). A first limiting strip (407) is slidably connected to the support seat (401), and a first tension spring (408) is fixedly connected between the first limiting strip (407) and the outer wall of the support seat (401). An inclined surface is provided at the end of the first limiting strip (407), and a driving hole (409) is provided at the top of the screw rod (402).

3. A cantilever sealed valve according to claim 1, characterized in that: The cross-section of the support seat (401) is in a "U"-shaped structure, and a circular structure is formed between the rubber stopper (411) and the valve body (1).

4. A cantilever sealed valve according to claim 1, characterized in that: The driving structure (2) comprises two valve seats (201) and a valve cover (202) fixedly connected to the valve seats (201); the valve seats (201) are fixedly connected to the outer wall of the valve body (1); a valve stem (203) is rotatably connected between the two valve seats (201); a positioning plate (211) is fixedly connected to the interior of the valve body (1); the valve stem (203) and the positioning plate (211) are rotatably connected; a sealing ring (214) is fixedly connected to the inner wall of the valve body (1); a valve plate (213) is provided inside the valve body (1); the valve plate (213) abuts against the sealing ring (214); a connecting seat (204) is fixedly connected to the valve plate (213); and a connecting seat (204) is fixedly connected to the connecting seat (204). Two mounting frames (205), a first rotating shaft (206) is rotatably connected between the two mounting frames (205), both ends of the first rotating shaft (206) are rotatably connected to a rotating plate (207), the end of the rotating plate (207) is fixedly connected to the valve stem (203) via a positioning strip (212), the rotating plate (207) is rotatably connected to the positioning plate (211), a second rotating shaft (208) is rotatably connected between the tops of the two mounting frames (205), a rotating block (209) is rotatably connected to the second rotating shaft (208), a third rotating shaft (210) is rotatably connected to the positioning plate (211), and the end of the rotating block (209) is rotatably connected to the third rotating shaft (210).

5. A cantilever sealed valve according to claim 4, characterized in that: A rotating handle (215) is fixedly connected to the end of the valve stem (203), and the rotating handle (215) is rotatably connected to the valve cover (202).

6. A cantilever sealed valve according to claim 5, characterized in that: The limiting structure (3) comprises a guide groove (301) and a plurality of limiting holes (302) provided inside the guide groove (301); a guide groove (301) is provided on a surface of the valve cover (202) close to the outer side; a limiting rod (303) is slidably connected to the rotating handle (215); the bottom of the limiting rod (303) is engaged with the limiting hole (302); and a first spring (304) is fixedly connected between the limiting rod (303) and the rotating handle (215).

7. A cantilever sealed valve according to claim 6, characterized in that: A limit seat (305) is fixedly connected to the outer wall of the rotating handle (215), a limit slot (306) is provided on the limit seat (305), a slide slot (307) is provided on the limit slot (306), a rotating bar (308) is rotatably connected to the top of the limit rod (303), the rotating bar (308) is rotatably connected to the limit seat (305), a stopper (309) is fixedly connected to the inner side of the rotating bar (308), and the stopper (309) is slidably connected to the limit slot (306) and the slide slot (307), respectively.

8. The cantilever sealed valve according to claim 4, characterized in that: The fixed structure (5) comprises a rotating seat (501) and two fifth rotating shafts (502) fixedly connected to the rotating seat (501); the valve body (1) is fixedly connected to the three rotating seats (501); a rotating frame (503) is rotatably connected between the two fifth rotating shafts (502); two sliding rods (504) are slidably connected to the rotating frame (503); a pressure plate (505) is fixedly connected between the two sliding rods (504); a second spring (506) is fixedly connected between the pressure plate (505) and the rotating frame (503); a knob (507) is threadedly connected to one of the sliding rods (504); and the upper surface of the knob (507) is in contact with the rotating seat (501).

9. A cantilever sealed valve according to claim 8, characterized in that: The rotating frame (503) is in a "U"-shaped structure, and the sliding rod (504) is in a "T"-shaped structure.

10. The cantilever sealed valve according to claim 8, characterized in that: The support structure (6) comprises a mounting seat (601) and a rotating rod (602) rotatably connected to the mounting seat (601); the mounting seat (601) is fixedly connected to the outer wall of the valve body (1); a cantilever (603) is slidably connected to the inside of the rotating rod (602); a plurality of slots (604) are provided on the cantilever (603); a second limit strip (605) is slidably connected to the rotating rod (602); a second tension spring (606) is fixedly connected between the second limit strip (605) and the outer wall of the rotating rod (602); an end of the second limit strip (605) is engaged with the slot (604); a sixth rotating shaft (607) is rotatably connected to the end of the cantilever (603); a mounting plate (608) is rotatably connected to the sixth rotating shaft (607); a nut (609) is threadedly connected to the sixth rotating shaft (607); the nut (609) and the outer wall of the cantilever (603) are in contact with each other.

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