A cantilevered airtight valve

Abstract

The present invention relates to the technical field of airtight valves, and specifically relates to a cantilever airtight valve, which includes a valve body, a driving structure, a limiting structure, a maintenance structure, a fixing structure and a supporting structure. The driving structure is used in cooperation with the limiting structure, thereby facilitating the control of the opening and closing of the airtight valve. At the same time, it is convenient to arbitrarily control the opening size of the airtight valve through the limiting structure, avoiding the problem that the airtight valve is accidentally closed under external forces such as vibration, improving the stability. The setting of the maintenance structure facilitates the rapid maintenance of the parts inside the valve body or the addition of lubricating oil, avoiding the problem that it is more troublesome to remove the entire airtight valve, and improving the operation efficiency. The setting of the fixing structure facilitates the preliminary fixing of the valve body when installing the airtight valve, avoiding the problem that the valve body needs to be lifted all the time during installation, simplifying the operation process and having strong flexibility. The setting of the supporting structure facilitates the support of the valve body, reducing the pressure at the connection between the valve body and the pipeline and improving the stability.

Description

Technical Field

[0001] The present invention relates to the technical field of closed valves, and more specifically, to a cantilever closed valve. Background Art

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

[0003] When repairing the internal transmission components of a traditional closed valve or adding lubricating oil to the transmission components, the entire sealed valve is usually removed from the pipeline and then repaired or lubricating oil is added. However, when removing, bolts need to be repeatedly installed and disassembled, resulting in low operation efficiency and poor flexibility.

[0004] When installing the entire sealed valve between two pipelines, it is usually fixedly connected through a flange. During installation, due to the gravitational force, the operator needs to always lift the sealed valve and align it with the pipe orifice, and then install the bolts. As a result, the sealed valve is likely to fall during installation, with poor stability and inconvenient operation.

[0005] During the use of the sealed valve, in order to prevent the sealed valve from accidentally closing due to factors such as vibration, a pin is usually provided on the link mechanism to maintain the position of the valve plate. However, since the position of the pin remains constant, when it is necessary to adjust the opening size of the closed valve, it is difficult to always limit the link structure due to the fixed position of the pin, which is likely to cause the closed valve to accidentally close under external force factors and has poor flexibility. Summary of the Invention

[0006] In view of the problems in the prior art, the present invention provides a cantilever closed valve.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a cantilever closed valve, including a valve body, a driving structure installed on the valve body, a limiting structure connected to the driving structure, a maintenance structure installed on the valve body, a fixing structure connected to the valve body, and a supporting structure provided on the valve body;

[0008] The overhaul structure includes a support base and a lead screw rotatably connected to the support base. A support base is fixedly connected to the outer wall of the valve body. A guide rod is fixedly connected to the support base. Two sliders are slidably connected to the support base. One of the sliders is threadedly connected to the lead screw, 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 between the inner wall of the support base and the inner wall of the valve body.

[0009] Specifically, two positioning rods are fixedly connected inside the support base. The positioning rods are engaged with the sealing cover. A first limiting strip is slidably connected to the support base. A first tension spring is fixedly connected between the first limiting strip and the outer wall of the support base. The end of the first limiting strip is provided with an inclined surface. A driving hole is opened at the top of the lead screw.

[0010] Specifically, the cross-section of the support base is in a "U" - shaped structure, and a circular structure is formed between the rubber plug and the valve body.

[0011] Specifically, the driving structure includes two valve seats and a valve cover fixedly connected to the valve seats. A valve seat is fixedly connected to the outer wall of the valve body. A valve rod is rotatably connected between the two valve seats. A positioning plate is fixedly connected inside the valve body. The valve rod is rotatably connected to the positioning plate. A sealing ring is fixedly connected to the inner wall of the valve body. A valve plate is arranged inside the valve body. The valve plate abuts against the sealing ring. A connecting seat is fixedly connected to the valve plate. Two mounting brackets are fixedly connected to the connecting seat. A first rotating shaft is rotatably connected between the two mounting brackets. One rotating plate is rotatably connected to each end of the first rotating shaft. The end of the rotating plate is fixedly connected to the valve rod through a positioning strip. The rotating plate is rotatably connected to the positioning plate. A second rotating shaft is rotatably connected between the tops of the two mounting brackets. A rotating block is rotatably connected to the second rotating shaft. A third rotating shaft is rotatably connected to the positioning plate. The end of the rotating block is rotatably connected to the third rotating shaft.

[0012] Specifically, a rotating handle is fixedly connected to the end of the valve rod. The rotating handle is rotatably connected to the valve cover.

[0013] 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 the side of the valve cover close to the outside. A limiting rod is slidably connected to the rotating handle. The bottom of the limiting rod is engaged with the limiting hole. A first spring is fixedly connected between the limiting rod and the rotating handle.

[0014] Specifically, a limit seat is fixedly connected to the outer wall of the rotating handle. A limit groove is formed in the limit seat, and a sliding groove is formed in the limit groove. A rotating bar is rotatably connected to the top of the limit rod. The rotating bar is rotatably connected to the limit seat. A blocking block is fixedly connected to the inner side of the rotating bar. The blocking block is slidably connected to both the limit groove and the sliding groove.

[0015] Specifically, the fixing structure includes a rotating seat and two fifth rotating shafts fixedly connected to the rotating seat. The valve body is fixedly connected with 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 pressing plate is fixedly connected between the two sliding rods. A second spring is fixedly connected between the pressing plate and the rotating frame. A knob is threadedly connected to one of the sliding rods. The upper surface of the knob abuts against the rotating seat.

[0016] Specifically, the rotating frame is in a "U" - shaped structure, and the sliding rod is in a "T" - shaped structure.

[0017] 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. A cantilever is slidably connected inside the rotating rod. A plurality of clamping grooves are formed in the cantilever. A second limiting strip is slidably connected to the rotating rod. A second tension spring is fixedly connected between the second limiting strip and the outer wall of the rotating rod. The end of the second limiting strip is clamped in the clamping groove. The end of the cantilever is rotatably connected to a sixth rotating shaft. An installation plate is rotatably connected to the sixth rotating shaft. A nut is threadedly connected to the sixth rotating shaft. The nut abuts against the outer wall of the cantilever.

[0018] The beneficial effects of the present invention are as follows:

[0019] For a cantilever - type airtight valve of the present invention, a driving structure is provided on the valve body, and a limiting structure is provided on the driving structure. The driving structure is used in cooperation with the limiting structure, thereby facilitating the control of the opening and closing of the airtight valve. At the same time, it is convenient to arbitrarily control the opening size of the airtight valve through the limiting structure, avoiding the problem that the airtight valve is accidentally closed under external forces such as vibration, and improving the stability.

[0020] For a cantilever - type airtight valve of the present invention, a maintenance structure is installed on the valve body. The setting of the maintenance structure facilitates the rapid maintenance of the parts inside the valve body or the addition of lubricating oil, avoiding the problem that it is rather troublesome to disassemble the entire airtight valve, and improving the operation efficiency.

[0021] For a cantilever - type airtight valve of the present invention, a fixing structure is connected to the valve body. The setting of the fixing structure facilitates the preliminary fixing of the valve body during the installation of the airtight valve, avoiding the problem that the valve body needs to be continuously lifted during installation, simplifying the operation process, and having strong flexibility.

[0022] A cantilevered airtight valve according to the present invention is provided with a support structure on the valve body. The provision of the support structure facilitates the support of the valve body, reduces the pressure at the connection between the valve body and the pipeline, and improves the stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the drawings and embodiments.

[0024] Figure 1 FIG. is a schematic diagram of the overall structure of a preferred embodiment of a cantilevered airtight valve provided by the present invention;

[0025] Figure 2 is Figure 1 an enlarged schematic view of the structure of part A shown in;

[0026] Figure 3 is Figure 1 an enlarged schematic view of the structure of part B shown in;

[0027] Figure 4 is Figure 1 an enlarged schematic view of the structure of part C shown in;

[0028] Figure 5 FIG. is a schematic diagram of the connection structure between the valve seat and the valve cover of the present invention;

[0029] Figure 6 is Figure 5 an enlarged schematic view of the structure of part D shown in;

[0030] Figure 7 FIG. is a schematic diagram of the connection structure between the mounting seat and the rotating rod of the present invention;

[0031] Figure 8 FIG. is a schematic diagram of the connection structure between the sealing ring and the valve plate of the present invention;

[0032] Figure 9 FIG. is a schematic diagram of the connection structure between the fourth rotating shaft and the sealing cover of the present invention.

[0033] In the figure: 1. Valve body; 2. Driving structure; 201. Valve seat; 202. Valve cover; 203. Valve rod; 204. Connecting seat; 205. Mounting bracket; 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. Lead screw; 403. Slide block; 404. Guide rod; 405. Fourth rotating shaft; 406. Sealing cover; 407. First limiting 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. Slide rod; 505. Pressure plate; 506. Second spring; 507. Knob; 6. Support structure; 601. Mounting seat; 602. Rotating rod; 603. Cantilever; 604. Card slot; 605. Second limiting strip; 606. Second tension spring; 607. Sixth rotating shaft; 608. Mounting plate; 609. Nut. Detailed implementation manners

[0034] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with the specific implementation manners.

[0035] Such as Figure 1 , Figure 8 and Figure 9As shown in the figure, a cantilevered airtight valve according to the present invention includes a valve body 1, a driving structure 2 installed on the valve body 1, a limiting structure 3 connected to the driving structure 2, a maintenance structure 4 installed 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 maintenance structure 4 includes a support seat 401 and a lead screw 402 rotatably connected to the support seat 401. A support seat 401 is fixedly connected to the outer wall of the valve body 1. A guide rod 404 is fixedly connected to the support seat 401. Two sliders 403 are slidably connected to the support seat 401. One of the sliders 403 is threadedly connected to the lead screw 402, and 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 between the inner wall of the support seat 401 and the inner wall of the valve body 1. Two positioning rods 410 are fixedly connected to the inside of the support seat 401. The positioning rods 410 are engaged with the sealing cover 406. A first limiting strip 407 is slidably connected to the support seat 401. 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. A driving hole 409 is opened at the top of the lead screw 402. The cross-section of the support seat 401 is in a "U" shape structure. A circular structure is formed between the rubber plug 411 and the valve body 1;When the internal components of the closed valve are damaged and need to be repaired or lubricated, just first close the valve plate 213, and then rotate the lead screw 402 on the support base 401 through the drive hole 409. Further, the lead screw 402 drives the slider 403 and the fourth rotating shaft 405 to slide outwards. The fourth rotating shaft 405 drives the slider 403 at the other end to slide outwards along the guide rod 404. The arrangement of the guide rod 404 enhances the stability of the slider 403. At this time, the fourth rotating shaft 405 drives the sealing cover 406 to slide outwards. At the same time, the sealing cover 406 drives the rubber plug 411 on the inner side to slide out from the inner wall of the valve body 1 until the sealing cover 406 is no longer engaged with the positioning rod 410. 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 outwards to make the sealing cover 406 rotate 90 degrees around the fourth rotating shaft 405. Then release the first limiting strip 407. The first limiting strip 407 slides to its original position under the reset action of the first tension spring 408 and abuts against the sealing cover 406 to prevent the sealing cover 406 from rotating under the action of external force during maintenance or lubricant addition, thus affecting the operation of the operator. When it comes to maintenance or completion of lubricant addition, just press the sealing cover 406 towards 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 in sliding fit, driving the first limiting strip 407 to slide outwards. At this time, the first limiting strip 407 no longer blocks the rotation of the sealing cover 406. When the sealing cover 406 rotates 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 hex wrench to rotate the lead screw 402. Further, the lead screw 402 drives the sealing cover 406 and the rubber plug 411 to slide inwards until the rubber plug 411 is in close fit with the inner wall of the valve body 1. At this time, the maintenance of the internal parts of the valve body 1 or the addition of lubricant is completed, avoiding the overall removal of the valve body 1 and improving the operation efficiency.;

[0036] Specifically, such as Figure 1 、 Figures 3 - 6 and Figure 8As shown in the figure, the drive 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 rod 203 is rotatably connected between the two valve seats 201. A positioning plate 211 is fixedly connected inside the valve body 1. The valve rod 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 arranged 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. Two mounting brackets 205 are fixedly connected to the connecting seat 204. A first rotating shaft 206 is rotatably connected between the two mounting brackets 205. A rotating plate 207 is rotatably connected to each end of the first rotating shaft 206. The end of the rotating plate 207 is fixedly connected to the valve rod 203 through 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 brackets 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. The end of the rotating block 209 is rotatably connected to the third rotating shaft 210. The end of the valve rod 203 is fixedly connected to a rotating handle 215. The rotating handle 215 is rotatably connected to the valve cover 202; after the installation of the closed valve is completed and it is necessary to open the valve plate 213 inside the valve body 1, only need to first rotate the rotating strip 308 on the rotating handle 215 so that the rotating strip 308 does not block the rotation of the rotating handle 215. Then, the rotating handle 215 drives the valve rod 203 to rotate on the valve seat 201. The setting of the valve cover 202 ensures the sealing between the valve rod 203 and the valve seat 201. Since two rotating plates 207 are fixedly connected to the central position of the valve rod 203 through the positioning strip 212, the valve rod 203 drives the two rotating plates 207 to rotate. At the same time, the two rotating plates 207 drive the mounting brackets 205 and the connecting seat 204 to rotate. At this time, since the top of the mounting bracket 205 is rotatably connected to the rotating block 209 through the second rotating shaft 208, and the rotating block 209 is rotatably connected to the end of the positioning plate 211 through the third rotating shaft 210, during the process of the valve rod 203 driving the rotating plate 207 to rotate, the rotating plate 207 will rotate relative to the first rotating shaft 206. At the same time, in cooperation with the rotating block 209 and the positioning plate 211, 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 track of the valve plate 213 is a specific arc. During this process, the valve plate 213 gradually leaves the sealing ring 214 on the valve body 1, and thus the channel area for the valve to open gradually increases. The operation is simple and the flexibility is strong.

[0037] Specifically, as Figures 4 - 6As shown in the figure, the limiting structure 3 includes a guiding groove 301 and a plurality of limiting holes 302 formed inside the guiding groove 301. A guiding groove 301 is formed on one side of the valve cover 202 close to the outside. 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. 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 formed on the limiting seat 305. A sliding groove 307 is formed on the limiting groove 306. The top of the limiting rod 303 is rotatably connected to a rotating bar 308. The rotating bar 308 is rotatably connected to the limiting seat 305. A blocking block 309 is fixedly connected to the inner side of the rotating bar 308. The blocking block 309 is slidably connected to both the limiting groove 306 and the sliding groove 307. When it is necessary to control the opening size of the valve plate 213, since the rotating handle 215 is provided with a limiting rod 303, and since the bottom of the limiting rod 303 is of a frustum-shaped structure, during the process of rotating the rotating handle 215, the inclined surface at the bottom of the limiting rod 303 slidably cooperates with the edge of the limiting hole 302, driving the limiting rod 303 to slide upward. Since the blocking block 309 on the rotating bar 308 is aligned with the sliding groove 307 formed on the limiting seat 305 at this time, the limiting groove 306 does not block the upward movement of the blocking block 309 at this time. The limiting rod 303 drives the rotating bar 308 to slide upward, and the rotating bar 308 drives the blocking block 309 to slide upward along the sliding groove 307. At the same time, the bottom of the limiting rod 303 slides in the guiding groove 301. Therefore, the limiting rod 303 does not block the rotation of the rotating handle 215. When the rotating handle 215 is rotated to a specified angle, the limiting rod 303 is engaged with the corresponding limiting hole 302 inside the guiding groove 301 under the reset action of the first spring 304. The limiting rod 303 drives the blocking block 309 to slide back into the limiting groove 306 again. Then, the rotating bar 308 at the top of the limiting rod 303 is rotated in the reverse direction, so that the rotating bar 308 rotates around the limiting seat 305. At the same time, the rotating bar 308 drives the blocking block 309 to slide inside the limiting groove 306. Therefore, under the abutting action of the inner wall of the limiting groove 306, the upward sliding of the blocking block 309 and the rotating bar 308 is restricted, 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 realized, and the adjustment of the opening size of the valve plate 213 can be completed, avoiding the problem that the closed valve is likely to be accidentally closed under the influence of vibration factors, and having strong practicability.

[0038] Specifically, as Figure 1 and Figure 2As shown, the fixing structure 5 includes a rotating base 501 and two fifth rotating shafts 502 fixedly connected to the rotating base 501. The valve body 1 is fixedly connected with three rotating bases 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 pressing plate 505 is fixedly connected between the two sliding rods 504. A second spring 506 is fixedly connected between the pressing 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 abuts against the rotating base 501. The rotating frame 503 is in a "U" - shaped structure, and the sliding rod 504 is in a "T" - shaped structure. When installing the shut - off valve, the valve body 1 needs to be installed between two pipelines to control the opening and closing of the pipelines. At this time, just align the section of the valve body 1 with the rotating base 501 to the top pipeline. Since a flange is installed at the pipeline interface, after aligning the valve body 1 with the flange, rotate the rotating frames 503 on the three rotating bases 501 respectively through the fifth rotating shafts 502, so that the rotating frame 503 drives the pressing plate 505 to rotate to a position directly above the edge of the flange. Then pull down the two sliding rods 504, so that the sliding rods 504 drive the pressing plate 505 to move downward until the bottom surface of the pressing plate 505 abuts against the flange at the pipeline interface, while compressing the second spring 506. Then rotate the knob 507 on the sliding rod 504. Since the knob 507 is threadedly connected to the sliding rod 504, the upper surface of the knob 507 abuts against the rotating base 501. At the same time, the pressing plates 505 on the other two rotating frames 503 repeat the same operation. At this time, the valve body 1 is initially fixed on the pipeline, which is beneficial to the subsequent process of fixing the valve body 1 and the pipeline with bolts, avoiding the problem of always needing to lift the valve body 1 when tightening the bolts, improving the stability. Then fixedly connect the other end of the valve body 1 to another pipeline with bolts. At this time, the installation of the shut - off valve is completed, and the operation is simple.

[0039] Specifically, as Figure 1 and Figure 7As shown, the support structure 6 includes a mounting base 601 and a rotating rod 602 rotatably connected to the mounting base 601. The outer wall of the valve body 1 is fixedly connected with the mounting base 601. A cantilever 603 is slidably connected inside the rotating rod 602. A plurality of card slots 604 are formed in the cantilever 603. A second limiting strip 605 is slidably connected to the rotating rod 602. A second tension spring 606 is fixedly connected between the second limiting strip 605 and the outer wall of the rotating rod 602. The end of the second limiting strip 605 is engaged with the card slot 604. The end of the cantilever 603 is rotatably connected with a sixth rotating shaft 607. 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 abuts against the outer wall of the cantilever 603. After the installation of the closed valve is completed, in order to reduce the pressure on the connection point caused by the gravity of the closed valve, it is only necessary to fixedly connect the mounting plate 608 on the valve body 1 to the wall. First, adjust the length of the cantilever 603 extending outwards according to the distance between the valve body 1 and the wall. Just pull the second limiting strip 605 outwards, and then pull out the cantilever 603. When the appropriate length is adjusted, release the second limiting strip 605. Then, under the reset action of the second tension spring 606, the second limiting strip 605 is engaged with the corresponding card slot 604 on the cantilever 603. At this time, the adjustment of the length of the cantilever 603 extending outwards is completed. At the same time, the rotating rod 602 can be rotated to an appropriate direction through rotation with the mounting base 601. Rotate the mounting plate 608 to an appropriate angle through the sixth rotating shaft 607. Since the sixth rotating shaft 607 is of a "T" - shaped structure, and one end of the sixth rotating shaft 607 abuts against 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, use bolts to fixedly connect the mounting plate 608 to the wall, thereby playing a supporting role for the valve body 1, effectively reducing the pressure at the connection between the valve body 1 and the pipeline, and improving the stability.

[0040] When the present invention is in use and installing the closed valve, the valve body 1 needs to be installed between two pipelines for controlling the opening and closing of the pipelines. At this time, only the section of the valve body 1 with the rotating seat 501 needs to be aligned with the top pipeline. Since flange plates are installed at the pipeline interfaces, after aligning the valve body 1 with the flange plates, rotate the rotating frames 503 on the three rotating seats 501 respectively through the fifth rotating shaft 502, so that the rotating frames 503 drive the pressing plates 505 to rotate to the position directly above the edge of the flange plate. Then, pull down the two sliding rods 504 to drive the pressing plates 505 to move downward until the bottom surface of the pressing plates 505 abuts against the flange plates at the pipeline interfaces, while compressing the second spring 506. Then, rotate the knob 507 on the sliding rod 504. Since the knob 507 is threadedly connected to the sliding rod 504, the upper surface of the knob 507 abuts against the rotating seat 501. At the same time, the pressing plates 505 on the other two rotating frames 503 repeat the same operation. At this time, the valve body 1 is initially fixed on the pipeline, which is beneficial to the subsequent process of fixing the valve body 1 and the pipeline with bolts, avoiding the problem of always having to lift the valve body 1 when tightening the bolts, improving the stability. Then, fix the other end of the valve body 1 to another pipeline through bolts. At this time, the installation of the closed valve is completed, and the operation is simple. 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, only need to fixedly connect the mounting plate 608 on the valve body 1 to the wall. First, adjust the length of the cantilever 603 extending outward according to the distance between the valve body 1 and the wall. Just pull the second limiting strip 605 outward, and then pull out the cantilever 603. When adjusted to the appropriate length, release the second limiting strip 605. Then, the second limiting strip 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 adjustment of the length of the cantilever 603 extending outward is completed. At the same time, the rotating rod 602 can be rotated to the appropriate direction through the rotation with the mounting seat 601. Rotate the mounting plate 608 to the appropriate angle through the sixth rotating shaft 607. Since the sixth rotating shaft 607 is of a "T" - shaped structure, and one end of the sixth rotating shaft 607 abuts against the mounting plate 608 and the other end is threadedly connected with a nut 609, only need to tighten the nut 609 to fix the position of the mounting plate 608. At this time, use bolts to fix the mounting plate 608 to the wall, which plays a supporting role for the valve body 1, effectively reducing the pressure at the connection between the valve body 1 and the pipeline and improving the stability;

[0041] 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.

[0042] When the internal components of the closed valve are damaged and need to be repaired or lubricating oil is to be added, just first close the valve plate 213, and then rotate the lead screw 402 on the support base 401 through the drive hole 409. Further, the lead screw 402 drives the slider 403 and the fourth rotating shaft 405 to slide outwards. The fourth rotating shaft 405 drives the slider 403 at the other end to slide outwards along the guide rod 404. The arrangement of the guide rod 404 enhances the stability of the slider 403. At this time, the fourth rotating shaft 405 drives the sealing cover 406 to slide outwards. At the same time, the sealing cover 406 drives the rubber plug 411 on the inner side to slide out from the inner wall of the valve body 1 until the sealing cover 406 is no longer engaged with the positioning rod 410. 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 outwards to make the sealing cover 406 rotate 90 degrees around the fourth rotating shaft 405. Then release the first limiting strip 407. The first limiting strip 407 slides to its original position under the reset action of the first tension spring 408 and abuts against the sealing cover 406 to prevent the sealing cover 406 from rotating under the action of external force during maintenance or lubricating oil addition, thus affecting the operation of the operator. When it comes to maintenance or after the lubricating fluid is added, just press the sealing cover 406 towards 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 in sliding fit, driving the first limiting strip 407 to slide outwards. At this time, the first limiting strip 407 no longer blocks the rotation of the sealing cover 406. When the sealing cover 406 rotates 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 hex wrench to rotate the lead screw 402. Further, the lead screw 402 drives the sealing cover 406 and the rubber plug 411 to slide inwards until the rubber plug 411 is in close fit with the inner wall of the valve body 1. At this time, the maintenance 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 and improving the operation efficiency.

[0043] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0044] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments 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); The driving structure (2) comprises two valve seats (201) and valve covers (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); two mounting frames (205) are fixedly connected to the connecting seat (204); the two mounting frames (205) are rotatably connected to each other. A first rotating shaft (206) is connected, and both ends of the first rotating shaft (206) are rotatably connected to 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); 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); 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); 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.

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 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).

5. A cantilever sealed valve according to claim 4, characterized in that: The rotating frame (503) is in a "U"-shaped structure, and the sliding rod (504) is in a "T"-shaped structure.

6. A cantilever sealed valve according to claim 4, 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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