Buffer type nuclear power stop valve suitable for high-pressure environment

Abstract

The invention discloses a buffer type nuclear power stop valve suitable for a high-pressure environment, and relates to the technical field of nuclear power stop valves, the side face of a valve body is fixedly connected with a connecting component, and one end of the valve body is fixedly connected with a cleaning component. By means of the structure, the screen plate filters impurities in fluid, the impurities mixed with the fluid are prevented from entering the valve body and scratching the side face of the valve body, meanwhile, the fluid impacts and enters the valve body through the screen plate, the fluid impacts the screen plate, and therefore the fluid is prevented from entering the valve body. The mesh plate drives the ejection mechanism to be far away from the mesh plate through the telescopic rod, meanwhile, through impact force of fluid to the mesh plate, part of impact force is absorbed, impact of the fluid to the valve clack during opening is relieved, and an effective buffering effect can be provided in a high-pressure environment.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power stop valves, and in particular to a buffer type nuclear power stop valve suitable for high pressure environments. Background Art

[0002] A nuclear power shut-off valve is a valve used to cut off or connect the flow of media in a pipeline. It mainly relies on the lifting and lowering of the valve disc to control the flow of the fluid. When the valve disc is fully raised, the fluid can pass through the valve smoothly; when the valve disc drops and fits tightly against the valve seat, the fluid passage is cut off. In a nuclear power plant, it plays a key role in controlling the flow of media such as coolant and steam. For example, in the primary circuit system of a nuclear reactor, the shut-off valve can accurately control the flow of the coolant to ensure that the temperature of the reactor is within a safe range.

[0003] When the stop valve is opened, the inner side of the stop valve will be impacted by the rapid flow of the fluid, causing a light water hammer phenomenon to impact the valve and the inner side of the valve body. When the fluid flows and impacts for a long time, it will increase the maintenance cost and failure risk of the equipment. Summary of the invention

[0004] In view of the shortcomings of the prior art, the technical solution adopted by the present invention to solve the technical problems is: a buffer-type nuclear power stop valve suitable for a high-pressure environment according to the present invention comprises: A valve body, a connecting component is fixedly connected to the side of the valve body, and a cleaning component is fixedly connected to one end of the valve body; A filter component, which is used to filter the fluid entering the inner cavity of the valve body, and the side surface of the filter component is fixedly connected to an end of the valve body away from the cleaning component; The filter component comprises a filter housing, the filter housing is threadedly connected to the side of the valve body, a mesh plate is fixedly connected to the inner side of the filter housing, a telescopic rod is fixedly connected to the side of the mesh plate, an end of the telescopic rod away from the mesh plate is fixedly connected to a grid frame, a first spring is sleeved on the telescopic rod, one end of the first spring is fixedly connected to the mesh plate, the other end of the first spring is fixedly connected to the grid frame, an ejection mechanism is fixedly connected to the end of the grid frame close to the mesh plate, and the ejection mechanism is concentrically arranged with the mesh of the mesh plate; when the valve body is opened, the fluid continuously passes through the mesh plate into the valve body, so that the mesh plate filters impurities in the fluid, thereby preventing impurities mixed with the fluid from entering the valve body. Thus, impurities are prevented from scratching the side of the valve body. At the same time, the fluid impacts the mesh plate and enters the valve body through the mesh plate, so that the fluid impacts the mesh plate, so that the mesh plate drives the ejection mechanism away from the mesh plate through the telescopic rod. At the same time, the impact force of the fluid on the mesh plate is absorbed, so as to reduce the impact of the fluid on the valve disc when it is opened, and can provide effective buffering effect under high pressure environment. At the same time, the mesh plate continues to filter impurities in the fluid. When the mesh holes of the mesh plate are blocked with impurities, when the impact force of the fluid passing through the mesh plate is less than the tensile force of the first spring, the mesh plate drives the ejection mechanism to move toward the mesh plate through the reset stretching of the first spring, so as to eject the impurities blocked at the mesh holes of the mesh plate; Preferably, the ejection mechanism includes an ejection rod, one end of the ejection rod away from the ejector pin is fixedly connected to the grid frame, a sliding groove is provided on the side of the ejection rod, a sliding block is slidably connected to the inner side of the sliding groove, both ends of the sliding block are fixedly connected to a sliding sleeve, the side of the sliding sleeve is fixedly connected to a scraper, the side of the sliding sleeve is fixedly connected to a sliding rod, the side of the sliding rod is slidably connected to the inner side of the ejection rod, the end of the sliding rod away from the sliding rod is fixedly connected to the ejector pin, a second spring is sleeved on the sliding rod, one end of the second spring is fixedly connected to the ejection rod, and the other end of the second spring is fixedly connected to the ejector pin; when the impact force of the fluid passing through the mesh plate is less than the tensile force of the first spring, the mesh plate drives the ejection rod through the reset stretching of the first spring to move toward the mesh holes of the mesh plate The ejector rod drives the ejector pin to move toward the mesh hole of the mesh plate through the sliding rod, so that the ejector pin ejects the impurities blocked at the mesh hole. At the same time, when the extrusion force between the impurities blocked at the mesh hole and the inner side of the mesh hole is greater than the tensile force of the second spring, the ejector pin drives the slider to move in the slide groove through the sliding rod, so as to avoid excessive extrusion force between the impurities and the ejector pin, which may cause extrusion damage to the ejector pin. When the ejector pin continues to move toward the mesh hole of the mesh plate, the sliding rod drives the scraper plate to contact and move with the inner side of the mesh hole of the mesh plate, so that the scraper plate cleans the inner side of the mesh hole, so as to avoid that when the fluid continues to pass, the viscous impurities in the fluid will adhere to the inner side of the mesh hole, so as to continuously adhere to the inner side of the mesh hole of the mesh plate and be difficult to fall off naturally. Preferably, the cleaning component comprises a cleaning shell and a fixing frame, the side surface of the fixing frame is fixedly connected to the inner side of the valve body, the inner side of the cleaning shell is fixedly connected with a filter plate, the inner side of the fixing frame is fixedly connected with a guide rod, the side surface of the guide rod is slidably connected to the inner side of the through hole, the side surface of the guide rod is slidably connected with a scraping mechanism, a third spring is sleeved on the guide rod, one end of the third spring is fixedly connected to the cross plate, and the other end of the third spring is fixedly connected to the fixing frame; when the fluid passes through the interior of the valve body continuously, it is discharged through the filter plate, and at the same time, the impact force of the fluid causes the scraping mechanism to move on the guide rod, and when the valve body is closed, the impact force of the fluid passing through is less than the reset stretching of the third spring, so that the third spring drives the scraping mechanism to clean the cleaning shell and the inner side of the valve body, thereby preventing the viscous substances mixed in the fluid from adhering to the inner side of the cleaning shell; Preferably, the scraping mechanism comprises a cross plate, a through hole is provided on the side of the cross plate, and both sides of the cross plate are fixedly connected with a scraping plate, and the side of the scraping plate away from the cross plate is in contact with the inner side of the cleaning shell, and the side of the scraping plate is evenly provided with through holes; when the valve body is closed, when the impact force of the fluid passing through is less than the reset stretching of the third spring, the third spring drives the scraper through the cross plate to clean and move the cleaning shell and the inner side of the valve body, thereby scraping off the viscous substances attached to the inner side of the valve body when the fluid passes through the valve body, so as to avoid that the viscous substances mixed in the fluid will adhere to the inner side of the cleaning shell when the fluid continues to pass, thereby causing the aperture of the valve body outflow pipe to become smaller, thereby interfering with the normal passage speed of the fluid; Preferably, the connecting component comprises a connecting sleeve and a flow groove, the inner side of the connecting sleeve is threadedly connected with a valve stem, the top of the valve stem is fixedly connected with a handle, the bottom of the valve stem is fixedly connected with a valve flap mechanism, the flow groove is opened on the inner side of the valve body, and a sealing groove is arranged in the middle of the flow groove; when the valve body is opened, the handle is rotated, and the valve stem is driven by the handle to move upward in the connecting sleeve, and at the same time, the valve stem drives the valve flap mechanism to leave the sealing groove, so that the fluid can flow out normally through the flow groove; Preferably, the valve flap mechanism includes a valve flap, both sides of the valve flap are provided with arc surfaces, the arc surfaces are arranged parallel to the flow groove, the bottom of the valve flap is fixedly connected with an arc plate, the inner side of the arc plate is slidably connected with a buffer mechanism, the side of the arc plate is provided with an arc groove, the inner side of the arc groove is fixedly connected with an arc plate, and the inner side of the arc plate is fixedly connected to the side of the buffer mechanism; by arranging the arc surfaces on both sides of the valve flap and arranging the arc plate at the bottom of the valve flap, when the valve flap is opened, the impact force of the fluid on the valve flap can be reduced when the fluid passes through the valve flap, and for high-viscosity fluid, due to its own viscosity, it is easier to dissipate energy when passing through the arc surface, so that the effect of reducing the impact force may be more obvious, and at the same time, when the fluid continuously impacts the valve flap, the impact force of the fluid on the valve flap can be reduced by evenly arranging the buffer mechanisms on the side of the arc plate in order of height; Preferably, the buffer mechanism comprises a buffer block, a buffer rod is fixedly connected to the side of the buffer block, one end of the buffer rod away from the buffer block is slidably connected to the inner side of the arc plate, a fourth spring is sleeved on the buffer rod, one end of the fourth spring is fixedly connected to the buffer block, and the other end of the fourth spring is fixedly connected to the side of the arc plate, and the end of the buffer block away from the buffer rod is provided with step blocks from high to low; when the valve disc is opened, the fluid continues to pass through and impact the valve disc, by evenly arranging the step blocks on the circular arc plate, when the fluid impacts the step blocks, When the step block is subjected to impact force, the step block slides inside the valve disc and the inner side of the arc plate through the buffer rod, and at the same time, the fourth spring works as a buffer to reduce the impact of the fluid on the valve disc, thereby avoiding excessive impact force of the fluid on the valve disc at the moment the valve disc opens, which would cause impact damage to the side of the valve disc when the fluid passes through the valve disc for a long time. At the same time, buffer blocks are evenly arranged on the arc plate, and the buffer blocks are evenly arranged in height, so that when the fluid passes through the valve disc, the flow velocity will be reduced and the pressure distribution will become more uniform, thereby reducing the impact of the fluid on the valve disc.

[0005] The beneficial effects of the present invention are as follows: 1. The present invention sets a filtering component. When the valve body is opened, the fluid continuously enters the valve body through the mesh plate, so that the mesh plate filters impurities in the fluid, thereby preventing impurities mixed with the fluid from entering the valve body, thereby preventing the impurities from scratching the side of the valve body. At the same time, the fluid enters the valve body through the mesh plate through the impact, so that the fluid impacts the mesh plate, so that the mesh plate drives the ejection mechanism away from the mesh plate through the telescopic rod. At the same time, the impact force of the fluid on the mesh plate is absorbed, thereby reducing the impact of the fluid on the valve disc when opening, and can provide effective buffering effect under high-pressure environment.

[0006] 2. The present invention provides an ejection mechanism. When the impact force of the fluid passing through the mesh plate is less than the tensile force of the first spring, the mesh plate drives the ejection rod to move toward the mesh hole of the mesh plate through the reset stretching of the first spring, so that the ejection rod drives the ejector pin to move toward the mesh hole of the mesh plate through the sliding rod, so that the ejector pin ejects the impurities blocked at the mesh hole. At the same time, when the extrusion pressure between the impurities blocked at the mesh hole and the inner side of the mesh hole is greater than the tensile force of the second spring, the ejector pin drives the slider to move in the sliding groove through the sliding rod, so as to avoid excessive extrusion pressure between the impurities and the ejector pin, which may cause extrusion damage to the ejector pin. When the ejector pin continues to move toward the mesh hole of the mesh plate, the sliding rod drives the scraper to contact and move with the inner side of the mesh hole of the mesh plate, so that the scraper cleans the inner side of the mesh hole, so as to avoid that when the fluid continues to pass, the viscous impurities in the fluid will adhere to the inner side of the mesh hole, thereby continuously sticking to the inner side of the mesh hole of the mesh plate and being difficult to fall off naturally.

[0007] 3. The present invention provides a valve flap mechanism, provides arc surfaces on both sides of the valve flap, and provides an arc plate at the bottom of the valve flap, so that when the valve flap is opened and the fluid passes through the valve flap, the impact force of the fluid on the valve flap can be reduced. For high-viscosity fluid, due to its own viscosity, it is easier to dissipate energy when passing through the arc surface, so that the effect of reducing the impact force may be more obvious. At the same time, when the fluid continues to impact the valve flap, the buffer mechanism is evenly arranged at high and low levels on the side of the arc plate, thereby reducing the impact force of the fluid on the valve flap.

[0008] 4. The present invention provides a buffer mechanism. When the valve flap is opened and the fluid continues to pass through and impact the valve flap, step blocks are evenly arranged on the arc plate. When the fluid impacts the step blocks and the step blocks are subjected to impact force, the step blocks slide on the inner side of the valve flap and the arc plate through the buffer rod. At the same time, the buffering work of the fourth spring is used to reduce the impact of the fluid on the valve flap, thereby avoiding excessive impact force between the fluid and the valve flap at the moment the valve flap is opened, which would cause impact damage to the side of the valve flap when the fluid passes through the valve flap for a long time. At the same time, buffer blocks are evenly arranged on the arc plate and the buffer blocks are evenly arranged in height. When the fluid passes through the valve flap, the flow velocity will be reduced and the pressure distribution will become more uniform, thereby reducing the impact of the fluid on the valve flap. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of a buffer-type nuclear power stop valve suitable for high-pressure environments of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 It is a schematic diagram of the structure of the filter component of the present invention; Figure 4 It is a structural schematic diagram of the ejection mechanism of the present invention; Figure 5 It is a structural schematic diagram of the cleaning component of the present invention; Figure 6 It is a structural schematic diagram of the scraping mechanism of the present invention; Figure 7 It is a structural schematic diagram of the connecting component of the present invention; Figure 8 It is a structural schematic diagram of the valve flap of the present invention; Fig. 9 It is a structural schematic diagram of the valve flap mechanism of the present invention; Fig.10 It is a structural schematic diagram of the buffer mechanism of the present invention; In the figure: 1, valve body; 2, filter component; 21, filter housing; 22, mesh plate; 23, telescopic rod; 24, mesh frame; 25, first spring; 26, ejector mechanism; 261, ejector rod; 262, slide groove; 263, slide rod; 264, slide sleeve; 265, scraper; 266, ejector pin; 268, second spring; 267, slider; 3, cleaning component; 31, cleaning housing; 32, filter plate; 33, guide rod; 34, fixing frame; 35, third spring; 36, scraper Rubbing mechanism; 361, cross plate; 362, through hole; 363, scratch plate; 364, through hole; 4, connecting component; 41, connecting sleeve; 42, handle; 43, valve stem; 44, valve flap mechanism; 441, valve flap; 442, arc surface; 443, arc plate; 444, buffer mechanism; 4441, buffer block; 4442, buffer rod; 4443, step block; 4444, fourth spring; 445, arc groove; 446, arc plate; 45, flow groove; 46, sealing groove. 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 buffer-type nuclear power stop valve suitable for a high-pressure environment according to one embodiment of the present invention is described as follows; like Figure 1-Figure 4 The present invention shows a buffer type nuclear power stop valve suitable for high pressure environment, comprising: A valve body 1, a connecting component 4 is fixedly connected to the side of the valve body 1, and a cleaning component 3 is fixedly connected to one end of the valve body 1; A filter component 2, which is used to filter the fluid entering the inner cavity of the valve body 1, and a side surface of the filter component 2 is fixedly connected to an end of the valve body 1 away from the cleaning component 3; The filter component 2 includes a filter housing 21, which is threadedly connected to the side of the valve body 1, a mesh plate 22 is fixedly connected to the inner side of the filter housing 21, a telescopic rod 23 is fixedly connected to the side of the mesh plate 22, and one end of the telescopic rod 23 away from the mesh plate 22 is fixedly connected to a grid frame 24, a first spring 25 is sleeved on the telescopic rod 23, one end of the first spring 25 is fixedly connected to the mesh plate 22, and the other end of the first spring 25 is fixedly connected to the grid frame 24, and one end of the grid frame 24 close to the mesh plate 22 is fixedly connected to an ejection mechanism 26, and the ejection mechanism 26 is concentrically arranged with the mesh of the mesh plate 22; when the valve body 1 is opened, the fluid continues to pass through the mesh plate 22 into the valve body 1, so that the mesh plate 22 filters the impurities in the fluid, thereby preventing the impurities mixed in the fluid from entering the valve body 1, thereby preventing Impurities will scratch the side of the valve body, and at the same time, the fluid impacts the mesh plate 22 and enters the valve body 1, so that the fluid impacts the mesh plate 22, so that the mesh plate 22 drives the ejection mechanism 26 away from the mesh plate 22 through the telescopic rod 23, and at the same time, the impact force of the fluid on the mesh plate 22 is absorbed, so as to reduce the impact of the fluid on the valve disc 441 when it is opened, and can provide an effective buffering effect under a high-pressure environment. At the same time, the mesh plate 22 continues to filter impurities in the fluid. When the mesh holes of the mesh plate 22 are blocked with impurities, when the impact force of the fluid passing through the mesh plate 22 is less than the tensile force of the first spring 25, the mesh plate 22 drives the ejection mechanism 26 to move toward the mesh plate 22 through the reset stretching of the first spring 25, so as to eject the impurities blocked at the mesh holes of the mesh plate 22; The ejection mechanism 26 includes an ejection rod 261, one end of the ejection rod 261 away from the ejector pin 266 is fixedly connected to the grid 24, a slide groove 262 is provided on the side of the ejection rod 261, a slider 267 is slidably connected to the inner side of the slide groove 262, both ends of the slider 267 are fixedly connected to the sliding sleeve 264, a scraper 265 is fixedly connected to the side of the sliding sleeve 264, a sliding rod 263 is fixedly connected to the side of the slider 267, and the side of the sliding rod 263 is fixedly connected to the ejection rod 261. The inner side of the sliding connection, the end of the sliding rod 263 away from the sliding block 267 is fixedly connected with the ejector pin 266, the sliding rod 263 is sleeved with a second spring 268, one end of the second spring 268 is fixedly connected to the ejector rod 261, and the other end of the second spring 268 is fixedly connected to the ejector pin 266; when the impact force of the fluid passing through the mesh plate 22 is less than the tensile force of the first spring 25, the mesh plate 22 drives the ejector rod 261 through the reset stretching of the first spring 25, and moves toward the mesh plate 2 2, so that the ejector rod 261 drives the ejector pin 266 to move toward the mesh of the mesh plate 22 through the slide bar 263, so that the ejector pin 266 ejects the impurities blocked at the mesh. At the same time, when the extrusion force between the impurities blocked at the mesh and the inner side of the mesh is greater than the tensile force of the second spring 268, the ejector pin 266 drives the slider 267 to move in the slide groove 262 through the slide bar 263, so as to avoid excessive extrusion force between the impurities and the ejector pin 266, which will cause extrusion damage to the ejector pin 266. When the ejector pin 266 continues to move toward the mesh of the mesh plate 22, the slide bar 263 drives the scraper 265 to contact and move with the inner side of the mesh of the mesh plate 22, so that the scraper 265 cleans the inner side of the mesh, so as to avoid that when the fluid continues to pass, the viscous impurities in the fluid will adhere to the inner side of the mesh, and then continue to stick to the inner side of the mesh of the mesh plate 22, and it is difficult to fall off naturally. Embodiment 2, use Figure 5-Figure 6 A buffer-type nuclear power stop valve suitable for a high-pressure environment of the present invention is described as follows; like Figure 5-Figure 6 It is shown that a buffer type nuclear power stop valve suitable for high pressure environment of the present invention is based on the first embodiment; The cleaning component 3 includes a cleaning shell 31 and a fixing frame 34, the side of the fixing frame 34 is fixedly connected to the inner side of the valve body 1, the inner side of the cleaning shell 31 is fixedly connected to a filter plate 32, the inner side of the fixing frame 34 is fixedly connected to a guide rod 33, the side of the guide rod 33 is slidably connected to the inner side of the through hole 362, the side of the guide rod 33 is slidably connected to a rubbing mechanism 36, and a third spring 35 is sleeved on the guide rod 33, one end of the third spring 35 is fixedly connected to the cross plate 361, and the other end of the third spring 35 is fixedly connected to the cross plate 361. The fixing frame 34 is fixedly connected; when the fluid continues to pass through the interior of the valve body 1, it is discharged through the filter screen 32, and at the same time, the impact force of the fluid causes the scraping mechanism 36 to move on the guide rod 33. When the valve body 1 is closed, the impact force of the fluid passing through is less than the reset stretching of the third spring 35, so that the third spring 35 drives the scraping mechanism 36 to clean the cleaning shell 31 and the inner side of the valve body 1, thereby preventing the viscous substances mixed in the fluid from adhering to the inner side of the cleaning shell 31; The scraping mechanism 36 includes a cross plate 361, a through hole 362 is provided on the side of the cross plate 361, and both sides of the cross plate 361 are fixedly connected with a scraping plate 363, and the side of the scraping plate 363 away from the cross plate 361 contacts the inner side of the cleaning shell 31, and the side of the scraping plate 363 is evenly provided with through holes 364; when the valve body 1 is closed, when the impact force of the fluid passing through is less than the reset stretching of the third spring 35, the third spring 35 drives the scraper 265 through the cross plate 361 to clean and move the cleaning shell 31 and the inner side of the valve body 1, so as to scrape off the viscous substances attached to the inner side of the valve body 1 when the fluid passes through the valve body 1, so as to avoid that when the fluid continues to pass, the viscous substances mixed in the fluid will adhere to the inner side of the cleaning shell 31, thereby causing the aperture of the outflow pipe of the valve body 1 to become smaller, thereby interfering with the normal passing speed of the fluid; Example 3, using Figure 7-Figure 10 A buffer-type nuclear power stop valve suitable for a high-pressure environment of the present invention is described as follows; like Figure 7-Figure 10 It is shown that a buffer type nuclear power stop valve suitable for high pressure environment of the present invention is based on the first embodiment; The connecting component 4 includes a connecting sleeve 41 and a flow groove 45. The inner side of the connecting sleeve 41 is threadedly connected with a valve stem 43. The top of the valve stem 43 is fixedly connected with a handle 42. The bottom of the valve stem 43 is fixedly connected with a valve flap mechanism 44. The flow groove 45 is opened on the inner side of the valve body 1. A sealing groove 46 is provided in the middle of the flow groove 45. When the valve body 1 is opened, the handle 42 is rotated to drive the valve stem 43 to move upward in the connecting sleeve 41 through the handle 42. At the same time, the valve stem 43 drives the valve flap mechanism 44 to disengage from the sealing groove 46, so that the fluid can flow out normally through the flow groove 45. The valve flap mechanism 44 comprises a valve flap 441, both sides of which are provided with arc surfaces 442, which are arranged parallel to the flow groove 45, a circular arc plate 443 is fixedly connected to the bottom of the valve flap 441, a buffer mechanism 444 is slidably connected to the inner side of the circular arc plate 443, a circular arc groove 445 is provided on the side of the circular arc plate 443, an arc plate 446 is fixedly connected to the inner side of the circular arc groove 445, and the inner side of the arc plate 446 is fixedly connected to the side of the buffer mechanism 444; by providing the arc surfaces 442 on both sides of the valve flap 441, and The bottom of the flap 441 is provided with an arc plate 443, so that when the flap 441 is opened, the impact force of the fluid on the flap 441 can be reduced when the fluid passes through the flap 441. For high-viscosity fluid, due to its own viscosity, it is easier to dissipate energy when passing through the arc surface 442, so that the effect of reducing the impact force may be more obvious. At the same time, when the fluid continuously impacts the flap 441, the buffer mechanism 444 is evenly arranged at different heights on the side of the arc plate 443, so as to reduce the impact force of the fluid on the flap 441. The buffer mechanism 444 includes a buffer block 4441, a buffer rod 4442 is fixedly connected to the side of the buffer block 4441, one end of the buffer rod 4442 away from the buffer block 4441 is slidably connected to the inner side of the arc plate 446, a fourth spring 4444 is sleeved on the buffer rod 4442, one end of the fourth spring 4444 is fixedly connected to the buffer block 4441, and the other end of the fourth spring 4444 is fixedly connected to the side of the arc plate 446, and the end of the buffer block 4441 away from the buffer rod 4442 is provided with step blocks 4443 from high to low; when the valve flap 441 is opened, the fluid continues to pass through and impact the valve flap 441, by evenly arranging the step blocks 4443 on the arc plate 443, the fluid impacts the step blocks 4443. When the step block 4443 is hit, the step block 4443 slides inside the valve flap 441 and the arc plate 443 through the buffer rod 4442, and the fourth spring 4444 works as a buffer, thereby reducing the impact of the fluid on the valve flap 441, thereby preventing the fluid from having an excessively large impact force on the valve flap 441 at the moment when the valve flap 441 is opened, thereby causing impact damage to the side of the valve flap 441 when the fluid passes through the valve flap 441 for a long time, and at the same time, buffer blocks 4441 are evenly arranged on the arc plate 443, and the buffer blocks 4441 are evenly arranged in height, so that when the fluid passes through the valve flap 441, the flow velocity will be reduced, and the pressure distribution will become more uniform, thereby slowing down the impact of the fluid on the valve flap 441; The specific workflow is as follows: During operation, when the nuclear power shut-off valve needs to be opened, the operator operates the connecting component 4 to move the valve stem 43 upward, and the valve stem 43 drives the valve flap 441 to move upward together, and the valve flap 441 gradually leaves the valve seat, so that a channel is formed between the valve flap 441 and the flow groove 45, and the fluid can flow through the valve body 1 through the flow groove 45. As the valve flap 441 continues to rise, the flow area of ​​the valve body 1 gradually increases, and the flow rate of the fluid also gradually increases. When the fluid continues to pass through the filter component 2 and enters the valve body 1, it flows out through the cleaning component 3; When the valve body 1 is opened, the fluid continuously passes through the mesh plate 22 and enters the valve body 1, so that the mesh plate 22 filters the impurities in the fluid, thereby preventing the impurities mixed in the fluid from entering the valve body 1, thereby preventing the impurities from scratching the side of the valve body. At the same time, the fluid impacts the mesh plate 22 and enters the valve body 1, so that the fluid impacts the mesh plate 22, so that the mesh plate 22 drives the ejection mechanism 26 away from the mesh plate 22 through the telescopic rod 23. At the same time, the impact force of the fluid on the mesh plate 22 is absorbed, so as to reduce the impact of the fluid on the valve disc 441 when opening, and can provide an effective buffering effect under a high-pressure environment. At the same time, when the mesh plate 22 continues to filter the impurities in the fluid, when the mesh holes of the mesh plate 22 are blocked with impurities, when the impact force of the fluid passing through the mesh plate 22 is less than the tensile force of the first spring 25, the mesh plate 22 drives the ejection mechanism 26 to move toward the mesh plate 22 through the reset stretching of the first spring 25, thereby ejecting the impurities blocked at the mesh holes of the mesh plate 22; When the impact force of the fluid passing through the mesh plate 22 is less than the tensile force of the first spring 25, the mesh plate 22 drives the ejector rod 261 to move toward the mesh hole of the mesh plate 22 through the reset stretching of the first spring 25, so that the ejector rod 261 drives the ejector pin 266 to move toward the mesh hole of the mesh plate 22 through the sliding rod 263, so that the ejector pin 266 ejects the impurities blocked at the mesh hole. At the same time, when the extrusion force between the impurities blocked at the mesh hole and the inner side of the mesh hole is greater than the tensile force of the second spring 268, the ejector pin 266 drives the ejector pin 266 through the sliding rod 263 to move toward the mesh hole of the mesh plate 22. The slider 267 moves in the slide groove 262 to prevent the extrusion force between the impurities and the ejector pin 266 from being too large, thereby causing extrusion damage to the ejector pin 266. When the ejector pin 266 continues to move toward the mesh of the mesh plate 22, the slider 263 drives the scraper 265 to move in contact with the inner side of the mesh of the mesh plate 22, so that the scraper 265 cleans the inner side of the mesh, thereby preventing the viscous impurities in the fluid from adhering to the inner side of the mesh when the fluid continues to pass, thereby continuously adhering to the inner side of the mesh of the mesh plate 22 and being difficult to fall off naturally. After the fluid passes through the interior of the valve body 1 continuously, it is discharged through the filter screen 32. At the same time, the impact force of the fluid causes the scraping mechanism 36 to move on the guide rod 33. When the valve body 1 is closed, the impact force of the fluid passing through is smaller than the reset stretching of the third spring 35, so that the third spring 35 drives the scraping mechanism 36 to clean the cleaning shell 31 and the inner side of the valve body 1, thereby preventing the viscous substances mixed in the fluid from adhering to the inner side of the cleaning shell 31. When the valve body 1 is closed, when the impact force of the fluid passing through is less than the reset stretch of the third spring 35, the third spring 35 drives the scraper 265 through the cross plate 361 to clean the cleaning shell 31 and the inner side of the valve body 1, so as to scrape off the viscous substances attached to the inner side of the valve body 1 when the fluid passes through the valve body 1, so as to avoid the viscous substances mixed in the fluid from adhering to the inner side of the cleaning shell 31 when the fluid continues to pass through, thereby causing the aperture of the outflow pipe of the valve body 1 to become smaller, thereby interfering with the normal passing speed of the fluid; When the valve body 1 is opened, the handle 42 is rotated to drive the valve stem 43 to move upward in the connecting sleeve 41 through the handle 42, and at the same time, the valve stem 43 drives the valve flap mechanism 44 to separate from the sealing groove 46, so that the fluid can flow out normally through the flow groove 45; By providing arc surfaces 442 on both sides of the valve flap 441 and providing an arc plate 443 at the bottom of the valve flap 441, when the valve flap 441 is opened, the impact force of the fluid on the valve flap 441 can be reduced when the fluid passes through the valve flap 441. For high-viscosity fluid, due to its own viscosity, it is easier to dissipate energy when passing through the arc surface 442, so that the effect of reducing the impact force may be more obvious. At the same time, when the fluid continuously impacts the valve flap 441, the buffer mechanism 444 is evenly provided at the side of the arc plate 443 in sequence, thereby reducing the impact force of the fluid on the valve flap 441; When the valve flap 441 is opened, the fluid continues to pass through and impact the valve flap 441. By evenly arranging the step blocks 4443 on the arc plate 443, when the fluid impacts the step blocks 4443 and the step blocks 4443 are subjected to impact force, the step blocks 4443 slide inside the valve flap 441 and the arc plate 443 through the buffer rod 4442. At the same time, the buffering work of the fourth spring 4444 reduces the impact of the fluid on the valve flap 441, thereby avoiding excessive impact force between the fluid and the valve flap 441 at the moment when the valve flap 441 is opened, so that when the fluid passes through the valve flap 441 for a long time, impact damage is caused to the side of the valve flap 441. At the same time, by evenly arranging the buffer blocks 4441 on the arc plate 443, and the buffer blocks 4441 are evenly arranged in height, the flow velocity of the fluid will be reduced when passing through the valve flap 441, and the pressure distribution will become more uniform, thereby slowing down the impact of the fluid on the valve flap 441.

[0012] 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 buffer type nuclear power stop valve suitable for high pressure environment, characterized in that: include: A valve body (1), a connecting component (4) being fixedly connected to a side surface of the valve body (1), and a cleaning component (3) being fixedly connected to one end of the valve body (1); A filter component (2), the filter component (2) being used to filter the fluid entering the inner cavity of the valve body (1), the side surface of the filter component (2) being fixedly connected to an end of the valve body (1) away from the cleaning component (3); The filter component (2) comprises a filter housing (21), the filter housing (21) being threadedly connected to the side of the valve body (1), a mesh plate (22) being fixedly connected to the inner side of the filter housing (21), a telescopic rod (23) being fixedly connected to the side of the mesh plate (22), an end of the telescopic rod (23) away from the mesh plate (22) being fixedly connected to a mesh frame (24), a first spring (25) being sleeved on the telescopic rod (23), one end of the first spring (25) being fixedly connected to the mesh plate (22), the other end of the first spring (25) being fixedly connected to the mesh frame (24), an end of the mesh frame (24) close to the mesh plate (22) being fixedly connected to an ejection mechanism (26), the ejection mechanism (26) being arranged concentrically with the mesh holes of the mesh plate (22).

2. The buffer-type nuclear power stop valve suitable for high-pressure environment according to claim 1 is characterized in that: The ejection mechanism (26) comprises an ejection rod (261), a sliding groove (262) is provided on the side of the ejection rod (261), a slider (267) is slidably connected to the inner side of the sliding groove (262), sliding sleeves (264) are fixedly connected to both ends of the slider (267), a scraper (265) is fixedly connected to the side of the sliding sleeve (264), a sliding rod (263) is fixedly connected to the side of the slider (267), an ejector pin (266) is fixedly connected to one end of the sliding rod (263) away from the slider (267), and a second spring (268) is sleeved on the sliding rod (263).

3. The buffer-type nuclear power stop valve suitable for high-pressure environment according to claim 2 is characterized in that: One end of the ejector rod (261) away from the ejector pin (266) is fixedly connected to the grid (24), the side surface of the sliding rod (263) is slidably connected to the inner side of the ejector rod (261), one end of the second spring (268) is fixedly connected to the ejector rod (261), and the other end of the second spring (268) is fixedly connected to the ejector pin (266).

4. The buffer-type nuclear power stop valve suitable for high-pressure environment according to claim 1 is characterized in that: The cleaning component (3) comprises a cleaning shell (31) and a fixing frame (34); the side surface of the fixing frame (34) is fixedly connected to the inner side of the valve body (1); a filter plate (32) is fixedly connected to the inner side of the cleaning shell (31); a guide rod (33) is fixedly connected to the inner side of the fixing frame (34); a scraping mechanism (36) is slidably connected to the side surface of the guide rod (33); and a third spring (35) is sleeved on the guide rod (33).

5. The buffer-type nuclear power stop valve suitable for high-pressure environment according to claim 4 is characterized in that: The scraping mechanism (36) comprises a cross plate (361), a through hole (362) is provided on a side surface of the cross plate (361), both sides of the cross plate (361) are fixedly connected to a scraping plate (363), and the side surfaces of the scraping plate (363) are evenly provided with through holes (364).

6. The buffer-type nuclear power stop valve suitable for high-pressure environment according to claim 5 is characterized in that: The side surface of the guide rod (33) is slidably connected to the inner side of the through hole (362), one end of the third spring (35) is fixedly connected to the cross plate (361), the other end of the third spring (35) is fixedly connected to the fixing frame (34), and the side of the scratch plate (363) away from the cross plate (361) is in contact with the inner side of the cleaning housing (31).

7. The buffer-type nuclear power stop valve suitable for high-pressure environment according to claim 1 is characterized in that: The connecting component (4) comprises a connecting sleeve (41) and a flow groove (45); the inner side of the connecting sleeve (41) is threadedly connected to a valve stem (43); the top of the valve stem (43) is fixedly connected to a handle (42); the bottom of the valve stem (43) is fixedly connected to a valve flap mechanism (44); the flow groove (45) is opened on the inner side of the valve body (1); and a sealing groove (46) is provided in the middle of the flow groove (45).

8. The buffer-type nuclear power stop valve suitable for high-pressure environment according to claim 7 is characterized in that: The valve flap mechanism (44) comprises a valve flap (441), arc surfaces (442) are provided on both sides of the valve flap (441), the arc surfaces (442) are arranged parallel to the flow groove (45), a circular arc plate (443) is fixedly connected to the bottom of the valve flap (441), a buffer mechanism (444) is slidably connected to the inner side of the circular arc plate (443), a circular arc groove (445) is provided on the side of the circular arc plate (443), an arc plate (446) is fixedly connected to the inner side of the circular arc groove (445), and the inner side of the arc plate (446) is fixedly connected to the side of the buffer mechanism (444).

9. The buffer-type nuclear power stop valve suitable for high-pressure environment according to claim 8, characterized in that: The buffer mechanism (444) comprises a buffer block (4441), a side surface of the buffer block (4441) being fixedly connected to a buffer rod (4442), one end of the buffer rod (4442) away from the buffer block (4441) being slidably connected to the inner side of an arc plate (446), a fourth spring (4444) being sleeved on the buffer rod (4442), one end of the fourth spring (4444) being fixedly connected to the buffer block (4441), and the other end of the fourth spring (4444) being fixedly connected to the side surface of the arc plate (446), and a step block (4443) being arranged from high to low on one end of the buffer block (4441) away from the buffer rod (4442).

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