Flat gate valve with good sealing structure

Abstract

The invention discloses a flat gate valve with a good sealing structure, and relates to the technical field of flat gate valves, the top of a valve body is fixedly connected with a control part, the side face of the valve body is fixedly connected with a filtering part, and the side, away from the filtering part, of the valve body is fixedly connected with an anti-blocking part. When the control component is opened and oil or other substances normally pass through the valve body, the contact mechanism pulls the first spring to move on the guide rod through the impact force of the fluid, and when the control component is closed and the impact force of the fluid passing through the valve body is smaller than the tensile force of the first spring, the contact mechanism pulls the first spring to move on the guide rod through the tensile force of the first spring. And when oil or other substances pass through the gate valve, the oil or other substances are partially deposited and remained on the inner side of the gate valve, so that the phenomenon that the valve body is not tightly sealed is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of flat gate valves, and in particular to a flat gate valve with a good sealing structure. Background Art

[0002] The main feature of the flat gate valve is that its gate is in the shape of a flat plate. This design allows the contact area between the gate and the valve seat to be larger during the opening and closing process of the valve, providing good sealing performance. In the petrochemical production process, flat gate valves are widely used in various pipeline systems, such as crude oil pipelines, oil refining units, chemical reactors, etc. It can withstand high temperature, high pressure and corrosive media to ensure the safety and stability of the production process. As an important type of valve, flat gate valves have the advantages of simple structure, good sealing performance, and easy operation. They are widely used in many industries such as petrochemicals, electric power, and urban water supply and drainage.

[0003] As for the current traditional flat gate valve, when the gate valve is opened during use, some sediment will remain on the inside of the gate valve when oil or other substances pass through the gate valve. When the gate valve is closed, the gate valve will not be sealed tightly and is prone to leakage. In addition, when connecting to other pipelines, the sealing structure is not perfect. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention solves the technical problems by adopting the following technical solution: a flat gate valve with a good sealing structure according to the present invention comprises: A valve body, wherein a control component is fixedly connected to the top of the valve body, a filter is fixedly connected to the side of the valve body, an anti-blocking component is fixedly connected to the side of the valve body away from the filter, and a sealing component is fixedly connected to the middle of the inner cavity of the valve body; A moving mechanism, the moving mechanism is used to clean the inner side of the valve body, and the side surface of the moving mechanism is fixedly connected to the inner side of the valve body; The moving mechanism comprises a fixing frame, a side surface of the fixing frame is fixedly connected to the inner side of the valve body, a guide rod is fixedly connected to the fixing frame, the other end of the guide rod is fixedly connected to the filter element, a first spring is fixedly connected to the side surface of the fixing frame, and a contact mechanism is fixedly connected to the end of the first spring away from the fixing frame; when the control component is opened, when oil or other substances pass through the valve body normally, the impact force of the fluid causes the contact mechanism to pull the first spring to move on the guide rod, and when the control component is closed, when the impact force of the fluid passing through the valve body is less than the tensile force of the first spring, the contact mechanism is reset in the valve body through the tensile force of the first spring, so that the contact mechanism cleans the inner side of the valve body, thereby preventing oil or other substances from partially precipitating and remaining on the inner side of the gate valve when passing through the gate valve, thereby causing the valve body to be not tightly sealed; Preferably, the contact mechanism comprises a bracket, a circular hole is opened at the axis center of the side surface of the bracket, the inner side of the circular hole is slidably connected to the side surface of the guide rod, scrapers are fixedly connected to both sides of the bracket, and the side surface of the bracket is fixedly connected to one end of the first spring away from the fixing bracket; when the impact force of the fluid passing through the valve body is less than the tensile force of the first spring on the bracket, the bracket is reset by the tensile force of the first spring, so that the bracket drives the scraper to clean the inner side of the valve body, thereby preventing a large amount of fluid material from remaining on the inner side of the valve body when the fluid flows through the valve body, thereby causing a large amount of fluid debris to accumulate on the inner side of the valve body, and the scraper is made of hard plastic material, thereby preventing the scraper from contacting and moving with the inner side of the valve body for a long time, causing scratches on the inner side of the valve body, thereby reducing the service life of the valve body; Preferably, the anti-blocking component includes a mesh plate, the side surface of the mesh plate is fixedly connected to the inner side of the valve body, the side surface of the mesh plate is fixedly connected to a second spring, one end of the second spring away from the mesh plate is fixedly connected to a circular plate frame, the inner side of the circular plate frame is slidably connected to the side surface of the guide rod, and the circular plate frame is fixedly connected to a ejection mechanism on a side close to the mesh plate, and the ejection mechanism is concentrically arranged with the mesh holes of the mesh plate; when the fluid continues to enter the valve body through the mesh plate, some particulate impurities will be mixed in the fluid, and the fluid will be filtered through the mesh plate. When the mesh plate performs filtering work for a long time, the mesh holes of the mesh plate will be blocked by the particles in the fluid. When the mesh holes on the mesh plate are blocked more seriously, the impact force of the fluid passing through the mesh plate is less than the tensile force of the second spring, so that the second spring drives the circular plate frame to reset and move toward the mesh plate, and at the same time, the circular plate frame drives the ejection mechanism to eject the particulate impurities blocked in the mesh holes of the mesh plate, thereby preventing the impurities from being blocked in the mesh holes of the mesh plate, thereby affecting the normal passage speed of the fluid; The cam is connected with the push rod at one end and the push rod has the spring at the other end, and the cam is connected with the push rod at the other end by the spring. The ejector rod drives the ejector pin to eject the impurities stuck in the mesh of the mesh plate. At the same time, when the ejector rod drives the ejector pin to dredge the mesh, the ejector rod drives the arc plate to clean the inner side of the mesh of the mesh plate through the connecting sleeve, thereby ejecting the liquid and sludge remaining in the mesh through the fluid. At the same time, when the extrusion force between the ejector pin and the impurities stuck in the mesh is greater than the tensile force of the third spring, the ejector pin moves on the ejector rod through the connecting sleeve and moves on the inner side of the slot through the slider, thereby avoiding excessive extrusion force between the ejector pin and the impurities stuck in the mesh, thereby causing extrusion damage to the ejector pin. At the same time, when the extrusion force between the fluid residues remaining between the arc plate and the inner side of the mesh is too large, the arc plate can slide on the ejector rod through the connecting sleeve at the same time, thereby avoiding extrusion damage to the mesh caused by the arc plate, thereby damaging the service life of the mesh. Preferably, the control component comprises a mounting frame, the bottom of the mounting frame is fixedly connected to the side of the valve body, a valve stem is inserted on the top of the mounting frame, a hand wheel is fixedly connected to the side of the valve stem, a gate is fixedly connected to the bottom of the valve stem, and a connecting mechanism is fixedly connected to the inner side of the mounting frame; when the valve body needs to be closed, the hand wheel is rotated to drive the valve stem to rotate on the mounting frame, so that the valve stem drives the gate to contact with the sealing member, thereby closing the valve body; at the same time, when the valve body is opened, the gate is driven by the valve stem to move upward in the mounting frame when the valve body is opened, so that the gate is contacted and moved with the connecting mechanism, and then the two sides of the gate can be cleaned and contacted, so as to avoid a large amount of fluid from accumulating on the gate for a long time when the gate is separated from the resistance to the fluid, thereby causing the phenomenon that the fluid is dried on the gate, and at the same time, it is avoided that the particulate impurities in the fluid remain on the gate, so that the gate will continuously rub against the sealing surface during the opening and closing process, and may be worn after long-term use. The wear of the gate will increase the gap between the sealing surfaces, resulting in leakage; Preferably, the connecting mechanism comprises a connecting block, the side surface of the connecting block is fixedly connected to the inner side of the mounting frame, a clearance hole is opened in the middle of the connecting block, a connecting shaft is slidably connected to the inner side of the connecting block, an end of the connecting shaft away from the connecting block is fixedly connected to a cleaning assembly, a fourth spring is sleeved on the connecting shaft, one end of the fourth spring is fixedly connected to the connecting block, and the other end of the fourth spring is fixedly connected to the cleaning shell; when the gate plate moves upward, the gate plate and the cleaning assembly are continuously contacted and moved, so that the cleaning assembly is driven to move inside the connecting block through the connecting shaft, and at the same time, the fourth spring is used for buffering and stretching, so as to avoid excessive extrusion force between the cleaning assembly and the gate plate when the cleaning assembly contacts the gate plate for cleaning, thereby causing extrusion damage to the gate plate; Preferably, the cleaning assembly includes a cleaning shell, the side of the cleaning shell is fixedly connected to the end of the connecting shaft away from the connecting block, the inner side of the cleaning shell is fixedly connected to a cleaning frame, the top of the cleaning frame is rotatably connected to a cleaning roller, and the bottom of the cleaning frame is fixedly connected to a bent plate; when the gate plate moves upward, the gate plate and the bent plate are continuously in contact and move, so that the mesh plate cleans and scrapes the fluid remaining on the gate plate, and at the same time, a cleaning roller is arranged above the bent plate, so that after the bent plate cleans the side of the gate plate, the cleaning roller can be used to clean and wipe the area cleaned by the bent plate, thereby avoiding particulate impurities remaining on the side of the valve plate, so that when the gate plate and the seal are in friction contact subsequently, the wear of the gate plate will increase the gap between the gate plate and the sealing surface, resulting in leakage.

[0005] The beneficial effects of the present invention are as follows: 1. The present invention sets a moving mechanism. When the control component is opened and oil or other substances pass through the valve body normally, the impact force of the fluid causes the contact mechanism to pull the first spring to move on the guide rod. At the same time, when the control component is closed and the impact force of the fluid passing through the valve body is less than the tensile force of the first spring, the contact mechanism resets in the valve body through the tensile force of the first spring, so that the contact mechanism cleans the inside of the valve body, thereby preventing oil or other substances from being partially precipitated and remaining on the inside of the gate valve when passing through the gate valve, thereby causing the valve body to be loosely sealed.

[0006] 2. The present invention sets an anti-blocking component. When the fluid continues to enter the valve body through the mesh plate, some particulate impurities will be mixed in the fluid, and the fluid will be filtered through the mesh plate. When the mesh plate performs filtering work for a long time, the mesh holes of the mesh plate will be blocked by the particles in the fluid. When the mesh holes on the mesh plate are seriously blocked, the impact force of the fluid passing through the mesh plate is less than the tensile force of the second spring, so that the second spring drives the circular plate frame to reset and move toward the mesh plate, and at the same time, the circular plate frame drives the ejection mechanism to eject the particulate impurities blocked in the mesh holes of the mesh plate, so as to avoid the impurities being blocked in the mesh holes of the mesh plate, thereby affecting the normal passage speed of the fluid. At the same time, when the fluid impacts the circular plate frame for the first time, the tensile buffer force of the second spring can slow down the initial impact force of the fluid on the valve body when it is opened, so as to avoid the impact force of the fluid flow from contacting the gate valve, which will cause the gate valve to vibrate, and long-term vibration will easily cause the screws to loosen.

[0007] 3. The present invention provides an ejection mechanism. When the mesh holes on the mesh plate are seriously clogged, and the impact force of the fluid passing through the mesh plate is less than the tensile force of the second spring, the second spring drives the ejection rod to move toward the mesh plate through the circular plate frame, so that the ejection rod drives the ejector pin to eject the impurities stuck in the mesh holes of the mesh plate. At the same time, when the ejection rod drives the ejector pin to dredge the mesh holes, the ejection rod drives the arc plate through the connecting sleeve to clean the inner side of the mesh holes of the mesh plate, thereby ejecting the liquid and sludge remaining in the mesh holes of the fluid. When the extrusion pressure between the needle and the impurities stuck in the mesh is greater than the tensile force of the third spring, the ejector pin is moved on the ejector rod through the connecting sleeve, and at the same time, is moved on the inner side of the slot through the slider, so as to avoid excessive extrusion pressure between the ejector pin and the impurities stuck in the mesh, which may cause extrusion damage to the ejector pin. At the same time, when the extrusion pressure between the fluid residues remaining between the arc plate and the inner side of the mesh is too large, the arc plate can slide on the ejector rod through the connecting sleeve at the same time, so as to avoid extrusion damage to the mesh caused by the arc plate, which may damage the service life of the mesh.

[0008] 4. The present invention provides a cleaning component. When the gate plate moves upward, the gate plate and the bent plate continue to move in contact, so that the mesh plate can clean and scrape the fluid remaining on the gate plate. At the same time, a cleaning roller is provided above the bent plate. After the bent plate cleans the side of the gate plate, the cleaning roller can clean and wipe the area cleaned by the bent plate, thereby avoiding particulate impurities remaining on the side of the valve plate. Therefore, when the gate plate and the seal are in friction contact later, the wear of the gate plate will increase the gap between the gate plate and the sealing surface, causing leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1Schematic diagram of the structure of the flat gate valve with good sealing structure of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 It is a structural schematic diagram of the mobile mechanism of the present invention; Figure 4 It is a structural schematic diagram of the contact mechanism of the present invention; Figure 5 It is a schematic structural diagram of the anti-blocking component of the present invention; Figure 6 The present invention Figure 5 The structural diagram at A in the middle; Figure 7 It is a structural schematic diagram of the control component of the present invention; Figure 8 It is a structural schematic diagram of the connection mechanism of the present invention; Fig. 9 The present invention Figure 8 The structural diagram at B in the middle; In the figure: 1, valve body; 2, control component; 21, mounting frame; 22, valve stem; 23, hand wheel; 24, gate; 25, connecting mechanism; 251, connecting block; 252, clearance hole; 253, connecting shaft; 254, cleaning assembly; 2541, cleaning shell; 2542, cleaning frame; 2543, cleaning roller; 2544, bending plate; 255, fourth spring; 3, filter element; 4, moving mechanism; 41, guide rod; 4 2. Contact mechanism; 421. Bracket; 422. Round hole; 423. Scraper; 43. Fixed frame; 44. First spring; 5. Anti-blocking component; 51. Mesh plate; 52. Round plate frame; 53. Second spring; 54. Ejection mechanism; 541. Ejection rod; 542. Notch; 543. Sliding block; 544. Sliding rod; 545. Ejector pin; 546. Connecting sleeve; 547. Arc plate; 548. Third spring; 6. Sealing member. DETAILED DESCRIPTION

[0010] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0011] Example 1, using Figure 1-Figure 4 A flat gate valve with a good sealing structure according to one embodiment of the present invention is described as follows; like Figure 1-Figure 4The present invention shows that a flat gate valve with a good sealing structure comprises: A valve body 1, a control component 2 is fixedly connected to the top of the valve body 1, a filter 3 is fixedly connected to the side of the valve body 1, an anti-blocking component 5 is fixedly connected to the side of the valve body 1 away from the filter 3, and a sealing component 6 is fixedly connected to the middle of the inner cavity of the valve body 1; A moving mechanism 4, which is used to clean the inner side of the valve body 1, and a side surface of the moving mechanism 4 is fixedly connected to the inner side of the valve body 1; The moving mechanism 4 includes a fixing frame 43, the side of which is fixedly connected to the inner side of the valve body 1, a guide rod 41 is fixedly connected to the fixing frame 43, the other end of the guide rod 41 is fixedly connected to the filter element 3, a first spring 44 is fixedly connected to the side of the fixing frame 43, and a contact mechanism 42 is fixedly connected to the end of the first spring 44 away from the fixing frame 43; when the control component 2 is opened, when oil or other substances pass through the valve body 1 normally, the impact force of the fluid causes the contact mechanism 42 to pull the first spring 44 to move on the guide rod 41, and when the control component 2 is closed, when the impact force of the fluid passing through the valve body 1 is less than the tensile force of the first spring 44, the contact mechanism 42 is reset and moved in the valve body 1 by the tensile force of the first spring 44, so that the contact mechanism 42 cleans the inner side of the valve body 1, thereby preventing oil or other substances from partially precipitating and remaining on the inner side of the gate valve when passing through the gate valve, thereby causing the valve body 1 to be not tightly sealed; The contact mechanism 42 includes a bracket 421, a circular hole 422 is provided at the axis center of the side of the bracket 421, the inner side of the circular hole 422 is slidably connected to the side of the guide rod 41, and scrapers 423 are fixedly connected to both sides of the bracket 421, and the side of the bracket 421 is fixedly connected to one end of the first spring 44 away from the fixing bracket 43; when the impact force of the fluid passing through the valve body 1 is less than the tensile force of the first spring 44 on the bracket 421, the bracket 421 is reset by the tensile force of the first spring 44, so that the bracket 421 drives the scraper 423 to clean the inner side of the valve body 1, so as to avoid a large amount of fluid material remaining in the inner side of the valve body 1 when the fluid flows through the valve body 1, thereby causing a large amount of fluid debris to accumulate inside the valve body 1, and the scraper 423 is made of hard plastic material, so as to avoid the scraper 423 from contacting and moving with the inner side of the valve body 1 for a long time, which will cause scratches and damage to the inner side of the valve body 1, thereby reducing the service life of the valve body 1; Example 2, using Figure 5-Figure 6 A flat gate valve with a good sealing structure according to the present invention is described as follows; like Figure 5-Figure 6 It is shown that a flat gate valve with a good sealing structure of the present invention is based on the first embodiment; The anti-blocking component 5 includes a mesh plate 51, the side of the mesh plate 51 is fixedly connected to the inner side of the valve body 1, the side of the mesh plate 51 is fixedly connected to a second spring 53, the end of the second spring 53 away from the mesh plate 51 is fixedly connected to a circular plate frame 52, the inner side of the circular plate frame 52 is slidably connected to the side of the guide rod 41, the side of the circular plate frame 52 close to the mesh plate 51 is fixedly connected to an ejection mechanism 54, and the ejection mechanism 54 is concentrically arranged with the mesh of the mesh plate 51; when the fluid continues to pass through the mesh plate 51 into the valve body 1, since some particulate impurities are mixed in the fluid, the fluid is blocked by the mesh plate 51. When filtering, when the mesh plate 51 performs filtering for a long time, the mesh holes of the mesh plate 51 are often clogged by particles in the fluid. When the mesh holes on the mesh plate 51 are seriously clogged, the impact force of the fluid passing through the mesh plate 51 is less than the tensile force of the second spring 53, so that the second spring 53 drives the circular plate frame 52 to reset to the mesh plate 51, and at the same time, the circular plate frame 52 drives the ejection mechanism 54 to eject the particle impurities clogged in the mesh holes of the mesh plate 51, thereby preventing the impurities from clogging the mesh holes of the mesh plate 51, thereby affecting the normal passing speed of the fluid; The ejection mechanism 54 includes an ejection rod 541, one end of which is fixedly connected to the circular plate frame 52, a notch 542 is provided on the side of the ejection rod 541, a slider 543 is slidably connected to the inner side of the notch 542, a sliding rod 544 is fixedly connected to the side of the slider 543, the side of the sliding rod 544 is slidably connected to the inner side of the ejection rod 541, an end of the sliding rod 544 away from the slider 543 is fixedly connected to an ejector pin 545, a third spring 548 is sleeved on the sliding rod 544, and one end of the third spring 548 is fixedly connected to the ejector pin 545 The other end of the third spring 548 is fixedly connected to the end of the ejector rod 541 away from the circular plate frame 52, the side of the slider 543 is fixedly connected with a connecting sleeve 546, the end of the connecting sleeve 546 away from the arc plate 547 is fixedly connected to the ejector pin 545, and the side of the connecting sleeve 546 away from the ejector pin 545 is fixedly connected to the arc plate 547; when the mesh holes on the mesh plate 51 are seriously blocked, the impact force of the fluid passing through the mesh plate 51 is less than the tensile force of the second spring 53, and the second spring 53 drives the ejector rod 541 to move toward the mesh plate 51 through the circular plate frame 52. The ejector rod 541 moves, so that the ejector pin 545 ejects the impurities stuck in the mesh of the mesh plate 51. At the same time, when the ejector rod 541 drives the ejector pin 545 to dredge the mesh, the ejector rod 541 drives the arc plate 547 to clean the inner side of the mesh of the mesh plate 51 through the connecting sleeve 546, so that the liquid and sludge remaining in the mesh are ejected. At the same time, when the squeezing force between the ejector pin 545 and the impurities stuck in the mesh is greater than the tensile force of the third spring 548, the ejector pin 545 is connected to the arc plate 547. The connecting sleeve 546 moves on the ejection rod 541 and moves inside the notch 542 through the slider 543, thereby preventing the ejection pin 545 from being squeezed too much by the extrusion force between the ejection pin 545 and the impurities stuck in the mesh, thereby causing squeezing damage to the ejection pin 545. At the same time, when the squeezing force between the circular arc plate 547 and the fluid residues remaining inside the mesh is too great, the circular arc plate 547 can slide on the ejection rod 541 through the connecting sleeve 546, thereby preventing the circular arc plate 547 from squeezing damage to the mesh, thereby damaging the service life of the mesh. Embodiment 2, use Figure 7-Figure 9 A flat gate valve with a good sealing structure according to the present invention is described as follows; like Figure 7-Figure 9 It is shown that a flat gate valve with a good sealing structure of the present invention is based on the first embodiment; The control component 2 includes a mounting frame 21, the bottom of the mounting frame 21 is fixedly connected to the side of the valve body 1, a valve stem 22 is inserted on the top of the mounting frame 21, a hand wheel 23 is fixedly connected to the side of the valve stem 22, a gate plate 24 is fixedly connected to the bottom of the valve stem 22, and a connecting mechanism 25 is fixedly connected to the inner side of the mounting frame 21; when the valve body 1 needs to be closed, the hand wheel 23 is rotated to drive the valve stem 22 to rotate on the mounting frame 21, so that the valve stem 22 drives the gate plate 24 to abut against the sealing member 6, thereby closing the valve body 1, and when the valve body 1 is opened, the valve body 1 is opened. The valve stem 22 drives the gate plate 24 to move upward in the mounting frame 21, so that the gate plate 24 and the connecting mechanism 25 are in contact and moved, and then the two sides of the gate plate 24 can be cleaned and contacted, so as to avoid a large amount of fluid being accumulated on the gate plate 24 for a long time when the gate plate 24 is separated from the resistance to the fluid, thereby causing the fluid to dry on the gate plate 24, and at the same time, avoid the particle impurities in the fluid from remaining on the gate plate 24, so that the gate plate 24 will constantly rub against the sealing surface during the opening and closing process, and may be worn after long-term use. The wear of the gate plate 24 will increase the gap between the sealing surfaces, resulting in leakage; The connecting mechanism 25 includes a connecting block 251, the side of which is fixedly connected to the inner side of the mounting frame 21, a clearance hole 252 is provided in the middle of the connecting block 251, a connecting shaft 253 is slidably connected to the inner side of the connecting block 251, and a cleaning assembly 254 is fixedly connected to one end of the connecting shaft 253 away from the connecting block 251, and a fourth spring 255 is sleeved on the connecting shaft 253, one end of the fourth spring 255 is fixedly connected to the connecting block 251, and the other end of the fourth spring 255 is fixedly connected to the cleaning shell 2541; when the gate plate 24 moves upward, the gate plate 24 and the cleaning assembly 254 are continuously contacted and moved, so that the cleaning assembly 254 is driven to move inside the connecting block 251 through the connecting shaft 253, and at the same time, the fourth spring 255 is used for buffering and stretching, so as to avoid excessive extrusion between the cleaning assembly 254 and the gate plate 24 when the cleaning assembly 254 contacts the gate plate 24 for cleaning, thereby causing extrusion damage to the gate plate 24; The cleaning assembly 254 includes a cleaning shell 2541, the side of the cleaning shell 2541 is fixedly connected to the end of the connecting shaft 253 away from the connecting block 251, the inner side of the cleaning shell 2541 is fixedly connected to a cleaning frame 2542, the top of the cleaning frame 2542 is rotatably connected to a cleaning roller 2543, and the bottom of the cleaning frame 2542 is fixedly connected to a bent plate 2544; when the gate plate 24 moves upward, the gate plate 24 and the bent plate 2544 are continuously in contact and move, so that the mesh plate 51 cleans and scrapes the fluid remaining on the gate plate 24, and at the same time, a cleaning roller is arranged above the bent plate 2544, so that after the bent plate 2544 cleans the side of the gate plate 24, the cleaning roller 2543 can clean and wipe the cleaned area of ​​the bent plate 2544, thereby avoiding that particulate impurities will remain on the side of the valve plate, so that when the gate plate 24 is in friction contact with the seal 6 later, the wear of the gate plate 24 will increase the gap between the sealing surface and cause leakage.

[0012] The specific workflow is as follows: During operation, the pipeline is connected to one end of the valve body 1 close to the anti-blocking component 5, and the oil or other substances are normally passed through the valve body 1 through the control component 2, and the oil or other substances impact the anti-blocking component 5, thereby reducing the initial impact force of the oil or other substances on the valve body 1 when it is opened. At the same time, when the control component 2 is operated to close the valve body 1, the inner side of the valve body 1 can be cleaned through the moving mechanism 4; When the control component 2 is opened, when oil or other substances pass through the valve body 1 normally, the impact force of the fluid causes the contact mechanism 42 to pull the first spring 44 to move on the guide rod 41. At the same time, when the control component 2 is closed, when the impact force of the fluid passing through the valve body 1 is less than the tensile force of the first spring 44, the contact mechanism 42 is reset in the valve body 1 by the tensile force of the first spring 44, so that the contact mechanism 42 cleans the inside of the valve body 1, thereby preventing oil or other substances from being partially precipitated and remaining inside the gate valve when passing through the gate valve, thereby causing the valve body 1 to be not tightly sealed. When the impact force of the fluid passing through the valve body 1 is less than the tensile force of the first spring 44 on the bracket 421, the bracket 421 is reset by the tensile force of the first spring 44, so that the bracket 421 drives the scraper 423 to clean the inner side of the valve body 1, thereby preventing a large amount of fluid material from remaining in the inner side of the valve body 1 when the fluid flows through the valve body 1, thereby causing a large amount of fluid debris to accumulate inside the valve body 1. At the same time, the scraper 423 is made of hard plastic, thereby preventing the scraper 423 from contacting and moving with the inner side of the valve body 1 for a long time, causing scratches on the inner side of the valve body 1, thereby reducing the service life of the valve body 1; When the fluid continues to pass through the mesh plate 51 and enter the valve body 1, some particulate impurities will be mixed in the fluid, so the fluid will be filtered through the mesh plate 51. When the mesh plate 51 performs filtering for a long time, the mesh holes of the mesh plate 51 will be blocked by the particles in the fluid. When the mesh holes on the mesh plate 51 are blocked more seriously, the impact force of the fluid passing through the mesh plate 51 is less than the tensile force of the second spring 53, so that the second spring 53 drives the circular plate frame 52 to reset to the mesh plate 51, and at the same time, the circular plate frame 52 drives the ejection mechanism 54 to eject the particulate impurities blocked in the mesh holes of the mesh plate 51, so as to avoid the impurities blocking the mesh holes of the mesh plate 51, thereby affecting the normal passage speed of the fluid. When the mesh holes on the mesh plate 51 are blocked more seriously, and the impact force of the fluid passing through the mesh plate 51 is less than the tensile force of the second spring 53, the second spring 53 drives the ejector rod 541 to move toward the mesh plate 51 through the circular plate frame 52, so that the ejector rod 541 drives the ejector pin 545 to eject the impurities stuck in the mesh holes of the mesh plate 51. At the same time, when the ejector rod 541 drives the ejector pin 545 to dredge the mesh holes, the ejector rod 541 drives the arc plate 547 through the connecting sleeve 546 to clean the inner side of the mesh holes of the mesh plate 51, thereby ejecting the liquid and sludge remaining in the mesh holes of the fluid. At the same time, when the ejector pin 545 is in contact with the impurities stuck in the mesh holes, the ejector rod 541 drives the arc plate 547 to clean the inner side of the mesh holes of the mesh plate 51 through the connecting sleeve 546. When the squeezing force between the impurities at the mesh is greater than the tensile force of the third spring 548, the ejector pin 545 is moved on the ejector rod 541 through the connecting sleeve 546, and at the same time, the slider 543 is moved inside the slot 542, so as to avoid excessive squeezing force between the ejector pin 545 and the impurities stuck in the mesh, thereby causing squeezing damage to the ejector pin 545. At the same time, when the squeezing force between the circular arc plate 547 and the fluid residues remaining on the inner side of the mesh is too large, the circular arc plate 547 can slide on the ejector rod 541 through the connecting sleeve 546 at the same time, thereby avoiding squeezing damage to the mesh by the circular arc plate 547, thereby damaging the service life of the mesh; When the valve body 1 needs to be closed, the hand wheel 23 is rotated to drive the valve stem 22 to rotate on the mounting frame 21, so that the valve stem 22 drives the gate plate 24 to contact the sealing member 6, thereby closing the valve body 1. At the same time, when the valve body 1 is opened, the gate plate 24 is driven by the valve stem 22 to move upward in the mounting frame 21, so that the gate plate 24 and the connecting mechanism 25 are contacted and moved, so that the two sides of the gate plate 24 can be cleaned and contacted, so as to avoid a large amount of fluid from accumulating on the gate plate 24 for a long time when the gate plate 24 is separated from the resistance to the fluid, thereby causing the phenomenon of the fluid drying on the gate plate 24, and at the same time, avoiding the particle impurities in the fluid from remaining on the gate plate 24, so that the gate plate 24 will continuously rub against the sealing surface during the opening and closing process, and may be worn after long-term use. The wear of the gate plate 24 will increase the gap between the sealing surfaces, resulting in leakage; When the gate plate 24 moves upward, the gate plate 24 and the cleaning assembly 254 are in continuous contact and movement, so that the cleaning assembly 254 is driven to move inside the connecting block 251 through the connecting shaft 253, and at the same time, the fourth spring 255 works by buffering and stretching, so as to avoid excessive extrusion force between the cleaning assembly 254 and the gate plate 24 when the cleaning assembly 254 and the gate plate 24 are in contact and cleaning work, thereby causing extrusion damage to the gate plate 24; When the gate plate 24 moves upward, the gate plate 24 and the bent plate 2544 are in continuous contact and movement, so that the mesh plate 51 cleans and scrapes the fluid remaining on the gate plate 24. At the same time, a cleaning roller is provided above the bent plate 2544, so that after the bent plate 2544 cleans the side of the gate plate 24, the cleaning roller 2543 can clean and wipe the cleaned area of ​​the bent plate 2544, thereby avoiding particulate impurities remaining on the side of the valve plate. Therefore, when the gate plate 24 is in friction contact with the seal 6 later, the wear of the gate plate 24 will increase the gap between the gate plate 24 and the sealing surface, resulting in leakage.

[0013] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A flat gate valve with good sealing structure, characterized in that: include: A valve body (1), wherein a control component (2) is fixedly connected to the top of the valve body (1), a filter element (3) is fixedly connected to the side of the valve body (1), an anti-blocking component (5) is fixedly connected to the side of the valve body (1) away from the filter element (3), and a sealing component (6) is fixedly connected to the middle of the inner cavity of the valve body (1); A moving mechanism (4), the moving mechanism (4) being used to clean the inside of the valve body (1), the side surface of the moving mechanism (4) being fixedly connected to the inside of the valve body (1); The moving mechanism (4) comprises a fixing frame (43), the side surface of the fixing frame (43) being fixedly connected to the inner side of the valve body (1), a guide rod (41) being fixedly connected to the fixing frame (43), the other end of the guide rod (41) being fixedly connected to the filter element (3), a first spring (44) being fixedly connected to the side surface of the fixing frame (43), and a contact mechanism (42) being fixedly connected to one end of the first spring (44) away from the fixing frame (43).

2. According to claim 1, a flat gate valve with a good sealing structure is characterized in that: The contact mechanism (42) comprises a bracket (421), a circular hole (422) is provided at the axis center of the side surface of the bracket (421), the inner side of the circular hole (422) is slidably connected to the side surface of the guide rod (41), scrapers (423) are fixedly connected to both sides of the bracket (421), and the side surface of the bracket (421) is fixedly connected to an end of the first spring (44) away from the fixing frame (43).

3. The flat gate valve with good sealing structure according to claim 1 is characterized in that: The anti-blocking component (5) comprises a mesh plate (51), the side surface of the mesh plate (51) being fixedly connected to the inner side of the valve body (1), the side surface of the mesh plate (51) being fixedly connected to a second spring (53), the end of the second spring (53) away from the mesh plate (51) being fixedly connected to a circular plate frame (52), the inner side of the circular plate frame (52) being slidably connected to the side surface of the guide rod (41), the side of the circular plate frame (52) close to the mesh plate (51) being fixedly connected to an ejection mechanism (54), the ejection mechanism (54) being arranged concentrically with the mesh hole of the mesh plate (51).

4. The flat gate valve with good sealing structure according to claim 3 is characterized in that: The ejection mechanism (54) comprises an ejection rod (541), a notch (542) is provided on a side surface of the ejection rod (541), a slider (543) is slidably connected to the inner side of the notch (542), a sliding rod (544) is fixedly connected to the side surface of the slider (543), an end of the sliding rod (544) away from the slider (543) is fixedly connected to an ejector pin (545), a third spring (548) is sleeved on the sliding rod (544), a connecting sleeve (546) is fixedly connected to the side surface of the slider (543), and a circular arc plate (547) is fixedly connected to the side of the connecting sleeve (546) away from the ejector pin (545).

5. The flat gate valve with good sealing structure according to claim 4 is characterized in that: One end of the ejector rod (541) is fixedly connected to the circular plate frame (52), one end of the connecting sleeve (546) away from the arc plate (547) is fixedly connected to the ejector pin (545), one end of the third spring (548) is fixedly connected to the ejector pin (545), the other end of the third spring (548) is fixedly connected to one end of the ejector rod (541) away from the circular plate frame (52), and the side surface of the sliding rod (544) is slidably connected to the inner side of the ejector rod (541).

6. The flat gate valve with good sealing structure according to claim 1, characterized in that: The control component (2) comprises a mounting frame (21), the bottom of the mounting frame (21) is fixedly connected to the side of the valve body (1), a valve stem (22) is inserted into the top of the mounting frame (21), a hand wheel (23) is fixedly connected to the side of the valve stem (22), a gate plate (24) is fixedly connected to the bottom of the valve stem (22), and a connecting mechanism (25) is fixedly connected to the inner side of the mounting frame (21).

7. The flat gate valve with good sealing structure according to claim 6, characterized in that: The connecting mechanism (25) comprises a connecting block (251), a clearance hole (252) is provided in the middle of the connecting block (251), a connecting shaft (253) is slidably connected to the inner side of the connecting block (251), a cleaning assembly (254) is fixedly connected to one end of the connecting shaft (253) away from the connecting block (251), and a fourth spring (255) is sleeved on the connecting shaft (253).

8. The flat gate valve with good sealing structure according to claim 7, characterized in that: The cleaning assembly (254) comprises a cleaning shell (2541), the side surface of the cleaning shell (2541) being fixedly connected to an end of the connecting shaft (253) away from the connecting block (251), the inner side of the cleaning shell (2541) being fixedly connected to a cleaning frame (2542), the top of the cleaning frame (2542) being rotatably connected to a cleaning roller (2543), and the bottom of the cleaning frame (2542) being fixedly connected to a bent plate (2544).

9. The flat gate valve with good sealing structure according to claim 8, characterized in that: The side surface of the connection block (251) is fixedly connected to the inner side of the mounting frame (21), one end of the fourth spring (255) is fixedly connected to the connection block (251), and the other end of the fourth spring (255) is fixedly connected to the cleaning shell (2541).

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