A soft-sealed gate valve with elastic sealing function and use method thereof

Abstract

The present invention relates to the technical field of soft-sealed gate valves, and discloses a soft-sealed gate valve with elastic sealing function and a method of use, comprising a valve body, both ends of the valve body are fixedly equipped with a connecting pipe 1, the top of the valve body is fixedly equipped with a top cover, the top of the top cover is fixedly equipped with a fixing seat, the inner wall of the fixing seat is threadedly connected with a valve core 1, and the inner wall of the valve core 1 is threadedly connected with a valve core 2. The turntable is located in the inner cavity of the medium tank and moves downward, the turntable squeezes the medium located in the medium tank, and seals the flow hole, so that the medium flows to the expansion rubber 1 and the expansion rubber 2 respectively through the connecting pipe 2 and the connecting pipe 3; to avoid the shock wave generated by the inertia of the medium caused by directly sealing the valve body, causing the pressure in the closed pipeline to rise rapidly and cause damage, the guiding effect of the inclined guide groove is utilized, and the U-shaped scraper plate located on the inner wall of the inner tank is moved through the up and down movement of the cut-off plate, so that the U-shaped scraper plate scrapes the sludge adhered to the inner wall of the inner tank.

Description

Technical Field

[0001] The invention relates to the technical field of soft-sealed gate valves, and in particular to a soft-sealed gate valve with an elastic sealing function and a use method thereof. Background Art

[0002] Soft-sealed gate valve, industrial valve, the opening and closing parts of the soft-sealed gate valve are the gate disc, the movement direction of the gate disc is perpendicular to the direction of the fluid, the gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled.

[0003] When the gate needs to be closed, the worker turns the rotating disk and drives the gate downward through the screw. The rubber on the gate contacts the pipe, thereby blocking the water flow in the pipe. The rubber is generally set to be larger than the inner diameter of the pipe. When the rubber moves downward, it will be squeezed by the pipe, thereby ensuring the sealing of the gate. However, the friction between the rubber and the inner wall of the pipe is large, which will cause the rubber ring on the gate to wear faster. In addition, in order to achieve that when the worker turns the rotating disk, the gate drives the rubber to move perpendicularly to the direction of the fluid, a slide groove embedded with the gate rubber will be set on the inner wall of the pipe to guide the gate rubber to move perpendicularly to the direction of the fluid. Mud and sand impurities will remain in the slide groove. When the gate and rubber move downward, the mud and sand will hinder the contact between the rubber and the bottom of the pipe, resulting in poor sealing effect. Summary of the invention

[0004] The present invention provides a soft-sealed gate valve with elastic sealing function and a use method thereof, which solves the problems raised by the above-mentioned background technology.

[0005] The present invention provides the following technical solution: a soft-sealed gate valve with an elastic sealing function, comprising a valve body, both ends of the valve body are fixedly equipped with connecting pipes 1, the top of the valve body is fixedly equipped with a top cover, the top of the top cover is fixedly equipped with a fixed seat, the inner wall of the fixed seat is threadedly connected to a valve core 1, and the inner wall of the valve core 1 is threadedly connected to a valve core 2.

[0006] As a preferred technical solution of the present invention: the valve body includes an outer shell, the inner cavity of the outer shell is provided with an inner groove, connecting grooves are provided on both sides of the outer shell, the inner walls at both ends of the top of the inner groove are fixedly equipped with limiting slides, the inner wall of the inner groove is sleeved with a U-shaped scraper plate, the inner wall of the top end of the U-shaped scraper plate is provided with a guide groove, and the outer wall of the U-shaped scraper plate close to the inner groove is inlaid with a frosted surface.

[0007] As a preferred technical solution of the present invention: the top of the U-shaped scraper plate and the bottom of the limiting slide plate overlap, the U-shaped scraper plate slides on the inner wall of the inner groove, the valve body is connected with the connecting pipe through the connecting groove, the top of the outer shell is fixedly assembled with the bottom of the top cover, and the guide groove is inclined.

[0008] As a preferred technical solution of the present invention: the top cover includes a containing shell, the top inner wall of the containing shell is fixedly equipped with two sets of telescopic tubes 1, and the bottom inner wall of the telescopic tube 1 is slidably sleeved with telescopic tube 2.

[0009] As a preferred technical solution of the present invention: the valve core 1 includes a stop plate, the inner cavity of the stop plate is provided with a medium groove, the inner walls on both sides of the medium groove are provided with flow holes, the inner edge of the flow hole close to one end of the medium groove is fixedly equipped with an expansion rubber 1, the bottom inner wall of the medium groove is fixedly equipped with a plurality of limit seats, the top of the limit seat is fixedly equipped with a filter plate, the top inner wall of the medium groove is provided with a threaded groove, the outer walls at both ends of the top of the stop plate are provided with limit holes corresponding to the telescopic tube 2, the outer walls at both ends of the stop plate are fixedly equipped with sliding shafts, the outer edges on both sides of the stop plate are fixedly equipped with expansion rubber 2, the inner walls of the medium groove are respectively provided with connecting pipes 2 and connecting pipes 3, and the top of the stop plate is rotatably sleeved with a rotating shaft 1.

[0010] As a preferred technical solution of the present invention: the connecting pipe 2 connects the expansion rubber 1 with the medium tank, the connecting pipe 3 connects the expansion rubber 2 with the medium tank, the connection points of the connecting pipe 2 and the connecting pipe 3 with the medium tank are both located at the bottom of the medium tank, the top of the filter plate is located at the bottom outer edge of the expansion rubber 1, the diameter of the flow hole located on the water inlet side is larger than the diameter of the flow hole on the water outlet side, the sliding shaft is slidably sleeved with the inner wall of the guide groove, and the rotating shaft 1 is threadedly connected with the inner wall of the fixing seat;

[0011] The limiting hole is sleeved with the telescopic tube.

[0012] As a preferred technical solution of the present invention: the valve core 2 includes a rotating shaft 2, a pressure plate is fixedly mounted on the top of the rotating shaft 2, and a rotating disk is rotatably sleeved on the bottom of the rotating shaft 2;

[0013] The rotating disk is located on the inner wall of the medium tank, and the second rotating shaft is threadedly connected to the inner wall of the first rotating shaft.

[0014] A method for using a soft-sealed gate valve with elastic sealing function:

[0015] Step 1: Rotate the rotating shaft 1 to move the stop plate downward, and initially seal the valve body through the stop plate. By opening the flow hole, the medium can flow out of the valve core 1 through the flow hole, so that the liquid keeps flowing, avoiding the shock wave generated by the inertia of the medium caused by the direct sealing of the valve body, resulting in a rapid increase in pressure in the closed pipeline system, causing damage to the pipeline and equipment;

[0016] Step 2: At the same time, the sliding shaft is slidably sleeved with the inner wall of the guide groove, the guide groove is inclined to guide, the cut-off plate is moved up and down, and the U-shaped scraping plate is limited by the limiting slide plate, so that the U-shaped scraping plate is located on the inner wall of the inner groove and moves, so that the U-shaped scraping plate scrapes the sludge adhered to the inner wall of the inner groove;

[0017] Step 3: The pressure plate is rotated to drive the rotating shaft 2 to rotate, and the rotating shaft 2 is threadedly connected to the inner wall of the rotating shaft 1, and the rotating disk and the inner wall of the medium tank are limited, so that the rotating disk located in the inner cavity of the medium tank moves downward, and then the rotating disk squeezes the medium located in the medium tank, so that the medium flows to the expansion rubber 1 and the expansion rubber 2 respectively through the connecting pipe 2, and the inner cavity of the expansion rubber 1 is expanded by the squeezing of the medium, so that the rotating disk and the inner wall of the medium tank are squeezed and sealed by the expansion rubber 1, and the cut-off plate and the inner tank are squeezed and sealed by the expansion rubber 2;

[0018] Step 4: By setting a limit seat and a filter plate, the turntable is limited in the downward movement in the medium slot to prevent the turntable from squeezing the medium in the medium slot too much, which may cause the expansion rubber 1 and the expansion rubber 2 to break. At the same time, filtering the medium through the filter plate can solve the problem of foreign matter in the medium clogging the expansion rubber 1 and the expansion rubber 2, thereby increasing the service life of the expansion rubber 1 and the expansion rubber 2.

[0019] The present invention has the following beneficial effects:

[0020] 1. The soft-sealed gate valve with elastic sealing function and the use method thereof, the valve body is initially sealed by the stop plate, and the inner cavity of the medium tank is moved downward by the turntable, so that the turntable squeezes the medium in the medium tank and seals the flow hole, so that the medium flows to the expansion rubber 1 and the expansion rubber 2 respectively through the connecting pipe 2 and the connecting pipe 3, and the inner cavity of the expansion rubber 1 is squeezed by the medium to achieve extrusion sealing between the turntable and the inner wall of the medium tank through the expansion rubber 1, and the extrusion sealing between the stop plate and the inner tank is achieved through the expansion rubber 2;

[0021] Avoid the phenomenon that the inertia of the medium caused by directly sealing the valve body generates shock waves, causing the pressure in the closed pipeline system to rise rapidly and cause damage to the pipeline and equipment.

[0022] 2. The soft-sealed gate valve with elastic sealing function and its use method are characterized by slidingly sleeved between the sliding shaft and the inner wall of the guide groove, utilizing the guiding effect of the inclined guide groove, and moving the cut-off plate up and down. The limiting slide plate is used to limit the U-shaped scraping plate, so that the U-shaped scraping plate is located on the inner wall of the inner groove and moves, thereby causing the U-shaped scraping plate to scrape the sludge adhered to the inner wall of the inner groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0025] Figure 3 This is a structural schematic diagram of a connecting pipe of the present invention;

[0026] Figure 4 This is a schematic diagram of the valve body structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the cross-sectional structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the sliding shaft structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the valve core of the present invention;

[0030] Figure 8 This is a schematic diagram of a cross-sectional structure of a valve core of the present invention;

[0031] Fig. 9 This is another cross-sectional structural schematic diagram of the valve core of the present invention.

[0032] In the figure: 1. valve body; 2. connecting pipe 1; 3. top cover; 4. fixing seat; 5. valve core 1; 6. valve core 2;

[0033] 101, outer shell; 102, inner groove; 103, connecting groove; 104, limiting slide plate; 105, U-shaped scraping plate; 106, guide groove;

[0034] 301, containing shell; 302, telescopic tube 1; 303, telescopic tube 2;

[0035] 501, stop plate; 502, medium slot; 503, flow hole; 504, expansion rubber 1; 505, limit seat; 506, filter plate; 507, threaded groove; 508, limit hole; 509, sliding shaft; 510, expansion rubber 2; 511, connecting pipe 2; 512, rotating shaft 1; 513, connecting pipe 3;

[0036] 601. Rotating shaft 2; 602. Turntable; 603. Pressure plate. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1 - Fig. 9 A soft-sealed gate valve with elastic sealing function comprises a valve body 1, both ends of the valve body 1 are fixedly assembled with connecting pipes 2, the top of the valve body 1 is fixedly assembled with a top cover 3, the top of the top cover 3 is fixedly assembled with a fixing seat 4, the inner wall of the fixing seat 4 is threadedly connected with a valve core 5, and the inner wall of the valve core 5 is threadedly connected with a valve core 2 6.

[0039] In a preferred embodiment: the valve body 1 includes an outer shell 101, the inner cavity of the outer shell 101 is provided with an inner groove 102, and connecting grooves 103 are provided on both sides of the outer shell 101. The inner walls at both ends of the top of the inner groove 102 are fixedly equipped with limiting slides 104, and the inner wall of the inner groove 102 is sleeved with a U-shaped scraper plate 105. The inner wall of the top end of the U-shaped scraper plate 105 is provided with a guide groove 106, and the outer wall of the U-shaped scraper plate 105 close to the inner groove 102 is inlaid with a frosted surface.

[0040] In a preferred embodiment: the top of the U-shaped scraper plate 105 overlaps the bottom of the limiting slide plate 104, the U-shaped scraper plate 105 slides on the inner wall of the inner groove 102, the valve body 1 is connected to the connecting pipe 2 through the connecting groove 103, the top of the outer shell 101 is fixedly assembled with the bottom of the top cover 3, and the guide groove 106 is inclined.

[0041] In the above structure, the top of the U-shaped scraper plate 105 and the bottom of the limiting slide plate 104 are overlapped, so that the limiting slide plate 104 limits the U-shaped scraper plate 105, so that the U-shaped scraper plate 105 will not tip over when sliding on the inner wall of the inner tank 102. The frosted surface embedded in the outer wall of the U-shaped scraper plate 105 close to the inner tank 102 side allows the frosted surface to scrape the sludge deposited and adhered to the inner wall of the inner tank 102 when the U-shaped scraper plate 105 moves on the inner wall of the inner tank 102.

[0042] In a preferred embodiment, the top cover 3 includes a housing 301 , the top inner wall of the housing 301 is fixedly equipped with two sets of telescopic tubes 1 302 , and the bottom inner wall of the telescopic tube 1 302 is slidably sleeved with a telescopic tube 2 303 .

[0043] In a preferred embodiment, the valve core 1 5 includes a stop plate 501, the inner cavity of the stop plate 501 is provided with a medium groove 502, the inner walls on both sides of the medium groove 502 are provided with flow holes 503, the inner edge of the flow hole 503 close to one end of the medium groove 502 is fixedly equipped with an expansion rubber 1 504, the bottom inner wall of the medium groove 502 is fixedly equipped with a plurality of limit seats 505, the top of the limit seat 505 is fixedly equipped with a filter plate 506, the top inner wall of the medium groove 502 is provided with a threaded groove 507, the outer walls at both ends of the top of the stop plate 501 are provided with limit holes 508 corresponding to the telescopic tube 2 303, the outer walls at both ends of the stop plate 501 are fixedly equipped with sliding shafts 509, the outer edges on both sides of the stop plate 501 are fixedly equipped with expansion rubber 2 510, the inner walls of the medium groove 502 are respectively provided with connecting pipes 2 511 and connecting pipes 3 513, and the top of the stop plate 501 is rotatably sleeved with a rotating shaft 1 512.

[0044] In a preferred embodiment: the second connecting pipe 511 connects the expansion rubber 1 504 and the medium tank 502, the third connecting pipe 513 connects the expansion rubber 2 510 and the medium tank 502, the connection points of the second connecting pipe 511 and the third connecting pipe 513 and the medium tank 502 are both located at the bottom of the medium tank 502, the top of the filter plate 506 is located at the bottom outer edge of the expansion rubber 1 504, the diameter of the flow hole 503 on the water inlet side is larger than the diameter of the flow hole 503 on the water outlet side, the sliding shaft 509 is slidably sleeved with the inner wall of the guide groove 106, and the rotating shaft 1 512 is threadedly connected with the inner wall of the fixing seat 4;

[0045] The limiting hole 508 is sleeved with the second telescopic tube 303 .

[0046] In the above structure, when the device is closed, the rotating shaft 1 512 is threadedly connected to the inner wall of the fixing seat 4, the rotating shaft 1 512 is rotated, and the limiting hole 508 is used to sleeve the telescopic tube 2 303, and the telescopic tube 2 303 is used to limit the stop plate 501, so that the stop plate 501 moves downward, and the flow hole 503 is opened, so that the flow hole 503 penetrates the stop plate 501, so that the medium can flow out of the valve core 1 5 through the flow hole 503, so that the liquid keeps flowing, and the shock wave caused by the inertia of the medium caused by the direct sealing of the valve body 1 is avoided, which causes the pressure in the closed pipeline system to rise rapidly, causing damage to the pipeline and equipment;

[0047] By setting the limit seat 505 and the filter plate 506, the rotating disk 602 is limited in the downward movement in the medium tank 502, so as to avoid the problem that the rotating disk 602 squeezes the medium in the medium tank 502 too much, resulting in the expansion rubber 1 504 and the expansion rubber 2 510 being broken. At the same time, by filtering the medium through the filter plate 506, the problem of foreign matter in the medium blocking the expansion rubber 1 504 and the expansion rubber 2 510 can be solved, so as to increase the service life of the expansion rubber 1 504 and the expansion rubber 2 510.

[0048] At the same time, by sliding the sliding shaft 509 and the inner wall of the guide groove 106, utilizing the guiding effect of the inclined guide groove 106, through the up and down movement of the cut-off plate 501, and utilizing the limiting slide plate 104 to limit the U-shaped scraper plate 105, the U-shaped scraper plate 105 is located on the inner wall of the inner groove 102 and moves, so that the U-shaped scraper plate 105 scrapes the sludge adhered to the inner wall of the inner groove 102.

[0049] In a preferred embodiment: the valve core 2 6 includes a rotating shaft 2 601 , a pressure plate 603 is fixedly mounted on the top of the rotating shaft 601 , and a rotating disk 602 is rotatably sleeved on the bottom of the rotating shaft 601 ;

[0050] The rotating disk 602 is located on the inner wall of the medium tank 502 , and the second rotating shaft 601 is threadedly connected to the inner wall of the first rotating shaft 512 .

[0051] In the above structure, the second rotating shaft 601 is driven to rotate by rotating the pressure plate 603, and the second rotating shaft 601 is threadedly connected to the inner wall of the first rotating shaft 512, and the rotation disk 602 and the inner wall of the medium groove 502 are limited, so that the rotation disk 602 located in the inner cavity of the medium groove 502 moves downward, and then the rotation disk 602 squeezes the medium located in the medium groove 502, so that the medium flows to the first expansion rubber 504 and the second expansion rubber 510 respectively through the connecting pipe 2 511 and the connecting pipe 3 513, and the inner cavity of the expansion rubber 1 504 is expanded by the squeezing of the medium, so that the rotation disk 602 and the inner wall of the medium groove 502 are squeezed and sealed by the expansion rubber 1 504, and the cut-off plate 501 and the inner groove 102 are squeezed and sealed by the expansion rubber 2 510.

[0052] A method for using a soft-sealed gate valve with elastic sealing function:

[0053] Step 1: Rotate the rotating shaft 1 512 to move the stop plate 501 downward, and initially seal the valve body 1 through the stop plate 501. By opening the flow hole 503, the medium can flow out of the valve core 1 5 through the flow hole 503, so that the liquid keeps flowing, and avoids the shock wave generated by the inertia of the medium caused by directly sealing the valve body 1, which causes the pressure in the closed pipeline system to rise rapidly, causing damage to the pipeline and equipment;

[0054] Step 2: At the same time, the sliding shaft 509 is slidably sleeved with the inner wall of the guide groove 106, and the guide groove 106 is inclined to guide the upper and lower ends of the cut-off plate 501. The limiting slide plate 104 limits the position of the U-shaped scraping plate 105, so that the U-shaped scraping plate 105 is located on the inner wall of the inner groove 102 and moves, so that the U-shaped scraping plate 105 scrapes the sludge adhered to the inner wall of the inner groove 102;

[0055] Step 3: The second rotating shaft 601 is driven to rotate by rotating the pressure plate 603, and the second rotating shaft 601 is threadedly connected to the inner wall of the first rotating shaft 512, and the rotation disk 602 and the inner wall of the medium groove 502 are limited, so that the rotation disk 602 located in the inner cavity of the medium groove 502 moves downward, and then the rotation disk 602 squeezes the medium located in the medium groove 502, so that the medium flows to the first expansion rubber 504 and the second expansion rubber 510 through the second connecting pipe 511 and the third connecting pipe 513 respectively, and the inner cavity of the first expansion rubber 504 is squeezed and expanded by the medium, so that the rotation disk 602 and the inner wall of the medium groove 502 are squeezed and sealed by the first expansion rubber 504, and the cut-off plate 501 and the inner groove 102 are squeezed and sealed by the second expansion rubber 510;

[0056] Step 4: By setting a limit seat 505 and a filter plate 506, the turntable 602 is limited in the downward movement in the medium slot 502 to prevent the turntable 602 from squeezing the medium in the medium slot 502 too much, resulting in the expansion rubber 1 504 and the expansion rubber 2 510 being broken. At the same time, by filtering the medium through the filter plate 506, the problem of foreign matter in the medium clogging the expansion rubber 1 504 and the expansion rubber 2 510 can be solved, thereby increasing the service life of the expansion rubber 1 504 and the expansion rubber 2 510.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soft-sealed gate valve with elastic sealing function, comprising a valve body (1), characterized in that: Both ends of the valve body (1) are fixedly mounted with connecting pipes 1 (2); the top of the valve body (1) is fixedly mounted with a top cover (3); the top of the top cover (3) is fixedly mounted with a fixing seat (4); the inner wall of the fixing seat (4) is threadedly connected with valve core 1 (5); the inner wall of the valve core 1 (5) is threadedly connected with valve core 2 (6); The valve core (5) comprises a stop plate (501), the inner cavity of the stop plate (501) is provided with a medium groove (502), the inner walls on both sides of the medium groove (502) are provided with flow holes (503), an expansion rubber (504) is fixedly mounted on the inner edge of one end of the flow hole (503) close to the medium groove (502), a plurality of limit seats (505) are fixedly mounted on the inner wall of the bottom of the medium groove (502), a filter plate (506) is fixedly mounted on the top of the limit seat (505), and the top of the medium groove (502) is provided with a filter plate (506). The inner wall of the cut-off plate (501) is provided with a threaded groove (507), the outer walls at both ends of the top of the cut-off plate (501) are provided with limit holes (508) corresponding to the second telescopic tube (303), the outer walls at both ends of the cut-off plate (501) are fixedly equipped with sliding shafts (509), the outer edges of both sides of the cut-off plate (501) are fixedly equipped with second expansion rubber (510), the inner wall of the medium groove (502) is respectively provided with a second connecting tube (511) and a third connecting tube (513), and the top of the cut-off plate (501) is rotatably sleeved with a first rotating shaft (512); The second connecting pipe (511) connects the expansion rubber (504) and the medium tank (502), and the third connecting pipe (513) connects the expansion rubber (510) and the medium tank (502). The connection points of the second connecting pipe (511) and the third connecting pipe (513) and the medium tank (502) are both located at the bottom of the medium tank (502). The top of the filter plate (506) is located at the bottom outer edge of the expansion rubber (504). The diameter of the flow hole (503) on the water inlet side is larger than the diameter of the flow hole (503) on the water outlet side. The sliding shaft (509) is slidably sleeved with the inner wall of the guide groove (106). The rotating shaft (512) is threadedly connected to the inner wall of the fixing seat (4). The limiting hole (508) is sleeved with the second telescopic tube (303).

2. A soft-sealed gate valve with elastic sealing function according to claim 1, characterized in that: The valve body (1) comprises an outer shell (101), the inner cavity of the outer shell (101) is provided with an inner groove (102), both sides of the outer shell (101) are provided with connecting grooves (103), the inner walls at both ends of the top of the inner groove (102) are fixedly equipped with limiting slide plates (104), the inner wall of the inner groove (102) is sleeved with a U-shaped scraping plate (105), the inner wall of the top end of the U-shaped scraping plate (105) is provided with a guide groove (106), and the outer wall of the U-shaped scraping plate (105) on the side close to the inner groove (102) is inlaid with a frosted surface.

3. A soft-sealed gate valve with elastic sealing function according to claim 2, characterized in that: The top of the U-shaped scraper plate (105) overlaps the bottom of the limiting slide plate (104), and the U-shaped scraper plate (105) slides on the inner wall of the inner groove (102). The valve body (1) is connected to the connecting pipe (2) through the connecting groove (103). The top of the outer shell (101) is fixedly assembled with the bottom of the top cover (3), and the guide groove (106) is arranged to be inclined.

4. A soft-sealed gate valve with elastic sealing function according to claim 3, characterized in that: The top cover (3) comprises a housing (301), the top inner wall of the housing (301) being fixedly mounted with two sets of telescopic tubes 1 (302), and the bottom inner wall of the telescopic tube 1 (302) being slidably sleeved with telescopic tube 2 (303).

5. The soft-sealed gate valve with elastic sealing function according to claim 4, characterized in that: The valve core 2 (6) comprises a rotating shaft 2 (601), a pressure plate (603) is fixedly mounted on the top of the rotating shaft 2 (601), and a rotating disk (602) is rotatably sleeved on the bottom of the rotating shaft 2 (601); The rotating disk (602) is located on the inner wall of the medium tank (502), and the second rotating shaft (601) is threadedly connected to the inner wall of the first rotating shaft (512).

6. A method for using a soft-sealed gate valve with elastic sealing function according to claim 5, comprising the following steps, characterized in that: Step 1: Rotate the rotating shaft 1 (512) to move the stop plate (501) downward, and initially seal the valve body (1) through the stop plate (501). Open the flow hole (503) to allow the medium to flow out of the valve core 1 (5) through the flow hole (503), so that the liquid keeps flowing, and avoids the direct sealing of the valve body (1) causing the shock wave generated by the inertia of the medium, resulting in a rapid increase in pressure in the closed pipeline system, causing damage to the pipeline and equipment; Step 2: At the same time, the sliding shaft (509) is slidably sleeved with the inner wall of the guide groove (106), and the guiding effect of the inclined guide groove (106) is utilized. By moving the cut-off plate (501) up and down, the limiting slide plate (104) is used to limit the U-shaped scraping plate (105), so that the U-shaped scraping plate (105) is located on the inner wall of the inner groove (102) and moves, so that the U-shaped scraping plate (105) scrapes the sludge adhered to the inner wall of the inner groove (102); Step 3: The second rotating shaft (601) is driven to rotate by rotating the pressure plate (603), and the second rotating shaft (601) is threadedly connected to the inner wall of the first rotating shaft (512), and the rotating disk (602) and the inner wall of the medium groove (502) are limited, so that the rotating disk (602) located in the inner cavity of the medium groove (502) moves downward, and then the rotating disk (602) squeezes the medium located in the medium groove (502), so that the medium flows to the first expansion rubber (504) and the second expansion rubber (510) respectively through the connecting pipe (511), and the inner cavity of the first expansion rubber (504) is expanded by the squeezing of the medium, so that the rotating disk (602) and the inner wall of the medium groove (502) are squeezed and sealed by the first expansion rubber (504), and the closing plate (501) and the inner groove (102) are squeezed and sealed by the second expansion rubber (510); Step 4: By providing a limit seat (505) and a filter plate (506), the rotating disk (602) is limited in its downward movement in the medium tank (502), so as to avoid the rotating disk (602) squeezing the medium in the medium tank (502) too much, thereby preventing the expansion rubber 1 (504) and the expansion rubber 2 (510) from being broken. At the same time, by filtering the medium through the filter plate (506), the problem of foreign matter in the medium blocking the expansion rubber 1 (504) and the expansion rubber 2 (510) can be solved, thereby increasing the service life of the expansion rubber 1 (504) and the expansion rubber 2 (510).

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