CN115451146B - Wear-resistant high-tightness knife gate valve and use method thereof - Google Patents

Wear-resistant high-tightness knife gate valve and use method thereof Download PDF

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Publication number
CN115451146B
CN115451146B CN202210926132.1A CN202210926132A CN115451146B CN 115451146 B CN115451146 B CN 115451146B CN 202210926132 A CN202210926132 A CN 202210926132A CN 115451146 B CN115451146 B CN 115451146B
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sliding
sealing
valve
plate
groups
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CN115451146A (en
Inventor
仇立强
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Jiangsu Gaoda Valve Co ltd
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Jiangsu Gaoda Valve Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Abstract

The invention discloses a wear-resistant high-tightness knife gate valve and a use method thereof, and belongs to the field of knife gate valves. The utility model provides a wear-resisting high leakproofness's knife gate valve, includes seal housing, valve body and connects in the support casing at seal housing top, still includes: the sealing mechanism is arranged in the valve body and comprises a first sliding component and a second sliding component; the auxiliary sealing assemblies are arranged at the bottom end inside the valve body, two groups of auxiliary sealing assemblies are symmetrically arranged, and the two groups of auxiliary sealing assemblies are matched with the sealing mechanism; the control assembly is arranged in the support shell and comprises two groups of valve plates which are connected to the inner wall of the sealing shell in a sliding manner, and the control assembly is matched with the auxiliary sealing assembly and the sealing mechanism through the valve plates; according to the invention, the abrasion resistance of the gate valve is increased by reducing the friction between the valve plate and the sealing ring, and the double sealing box is started to assist in fixing and sealing, so that the abrasion resistance and the sealing performance of the gate valve can be effectively improved.

Description

Wear-resistant high-tightness knife gate valve and use method thereof
Technical Field
The invention relates to the technical field of knife gate valves, in particular to a knife gate valve with wear resistance and high sealing performance and a use method thereof.
Background
The scale of pipeline transportation is larger and larger along with the rapid development of social economy, so that the knife gate valve is used more and more, and the flat valve plate is changed into a knife valve plate on the basis of a common gate valve; the knife gate valve solves the problems of large flow resistance, heavy weight, difficult installation, large occupied area and the like of common gate valves, flat gate valves, ball valves, stop valves, regulating valves, butterfly valves and the like by the advantages of small volume, small flow resistance, light weight, easy installation, easy disassembly and the like, and can be divided into a bright rod knife gate valve and a dark rod knife gate valve according to the thread position of a valve rod, however, the existing knife gate valve has low tightness in the use process and serious structural surface abrasion caused by long-term opening and closing.
Through retrieval, the patent with the publication number of CN214743434U discloses a novel wear-resistant knife gate valve, which comprises a bracket, a valve plate, a valve seat, a valve rod nut, a valve rod, a hand wheel, a wear-resistant connecting block, a knife-shaped gate and a wear-resistant sealing component, wherein the valve plate is arranged below the bracket; when the device is used, the closing valve plate and the sealing valve plate are separately operated, so that the operation steps are complex, the sealing effect cannot be quickly and effectively reflected, and in addition, the service life of the sealing air cushion is shorter, so that the device still has the defect.
Disclosure of Invention
The invention aims to solve the problems that when the sealing valve plate is used, the closing valve plate and the sealing valve plate are separated to operate, so that the operation steps are complex, the sealing effect cannot be quickly and effectively reflected, and in addition, the service life of a sealing air cushion is short.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a wear-resisting high leakproofness's knife gate valve, includes seal housing, valve body and connects in the support casing at seal housing top, the valve body is connected at seal housing top, seal housing is linked together with the valve body is inside, still includes:
the sealing mechanism is arranged inside the valve body and comprises a first sliding component and a second sliding component, the first sliding component is matched with the second sliding component, the first sliding component and the second sliding component both comprise sliding valve pipes, and the two groups of sliding valve pipes are respectively connected to side walls at two ends of the valve body;
the auxiliary sealing assemblies are arranged at the bottom end inside the valve body, two groups of the auxiliary sealing assemblies are symmetrically arranged, and the two groups of the auxiliary sealing assemblies are matched with the sealing mechanism;
the control assembly is arranged inside the support shell and comprises two groups of valve plates which are slidably connected to the inner wall of the sealing shell, and the control assembly is matched with the auxiliary sealing assembly and the sealing mechanism through the valve plates.
Preferably, the two sets of the outer tube walls of the sliding valve tubes are sleeved with the installation sliding sleeves, the installation sliding sleeves are slidably connected to the outer tube walls of the sliding valve tubes, one side, close to the valve plate, of each installation sliding sleeve is detachably provided with a sealing ring, and each installation sliding sleeve is matched with the valve plate through the corresponding sealing ring.
Preferably, the side walls at two sides of the installation sliding sleeve are all connected with sliding sleeve plates, the side walls of the sliding valve pipe are connected with guide sliding columns, the sliding sleeve plates are connected to the outer walls of the guide sliding columns in a sliding mode, reset springs are sleeved on the outer walls of the guide sliding columns, one ends of the reset springs are connected to the side walls of the sliding sleeve plates, and one ends, far away from the sliding sleeve plates, of the reset springs are connected to the side walls of the sliding valve pipe.
Preferably, the sliding sleeve plate outer side wall is connected with a limiting sliding column, the valve plate side wall is connected with a limiting control frame, a limiting sliding groove is formed in the limiting control frame side wall, the limiting sliding column is connected to the inner wall of the limiting sliding groove in a sliding mode, and a recession groove is formed in the sealing shell and matched with the limiting control frame.
Preferably, the valve body is internally provided with a U-shaped sealing frame, two groups of sealing grooves are formed in the bottom of the U-shaped sealing frame and are respectively matched with two groups of valve plates, and a bottom plate frame is arranged at the bottom of the U-shaped sealing frame.
Preferably, the seal auxiliary assembly comprises a pressing column, a sliding sealing rod and a pressing hole, the pressing hole is formed in the bottom of the sealing groove, the pressing hole penetrates through the U-shaped sealing frame to be communicated with the bottom plate frame, the pressing column is connected to the bottom of the valve plate, the sliding sealing rod is connected to the inner wall of the pressing hole in a sliding mode, and the pressing column is matched with the pressing hole and the sliding sealing rod respectively.
Preferably, the bottom inner wall of the bottom plate frame is rotationally connected with a C-shaped clamping plate, one side, close to the bottom plate frame, of the C-shaped clamping plate is matched with the sliding sealing rod, and one end, far away from the sliding sealing rod, of the C-shaped clamping plate is matched with the mounting sliding sleeve.
Preferably, the control assembly comprises a control motor, a screw rod and a lifting plate, wherein the screw rod is rotationally connected between a top plate and a bottom plate of the support shell, the lifting plate is connected to the outer wall of the screw rod, threads are arranged on the lifting plate and matched with the screw rod, the lifting plate is connected to the tops of the two groups of valve plates, the control motor is mounted on the top of the support shell, and the output end of the control motor penetrates through the support shell and is connected with the screw rod.
Preferably, the drain pipe is installed to the valve body bottom, two sets of be provided with the exhaust tube between the seal groove, the exhaust tube passes the valve body outer wall and outwards extends, drain pipe and exhaust tube tip are provided with the connecting thread, the manometer is installed to sealed housing outer wall, the one end that the valve plate was kept away from to the slide valve pipe is connected with the mounting disc.
The application method of the wear-resistant high-tightness knife gate valve comprises the following steps:
s1: when the device is used, the device is arranged at a designated position through the mounting disc, the exhaust pipe is connected with the exhaust end of the air pump, the drain pipe is provided with the switch and is connected with a drain pipe, and then the control motor is started to perform closing control on the gate valve;
s2: when the gate valve is closed by starting the control motor, the control motor rotates to drive the screw rod to rotate, the screw rod rotates to drive the lifting plate to descend through threads, the lifting plate drives two groups of valve plates to descend, the two groups of valve plates descend to drive the limiting control frame to descend, the limiting control frame drives the limiting sliding column to slide to one side of the valve plate through the limiting sliding groove, the limiting sliding column drives the sliding sleeve plate to slide on the outer wall of the guiding sliding column and drives the mounting sliding sleeve to slide on the outer wall of the sliding valve pipe to one side of the valve plate, the mounting sliding sleeve side drives the sealing ring to compress towards the valve plate, and the return spring is in a stretching state in the process;
s3: when the valve plate descends to the bottom, the sealing ring can compress and seal the gap between the valve plate and the U-shaped sealing frame, and the valve plate and the sealing ring do not carry out excessive friction in the descending process of the valve plate, so that the wear resistance of the sealing ring is effectively improved while the sealing performance is ensured, meanwhile, the descending of the valve plate to the bottom can drive the descending column to descend, the descending column is inserted into the descending hole and presses down the sliding sealing rod, the sliding sealing rod downwards slides to press one end of the C-shaped clamping plate, the C-shaped clamping plate rotates due to the downward pressing of one end, one end far away from the sliding sealing rod rotates, the installation sliding sleeve is compressed and locked after the rotation, the pressure and the deformation of the sealing ring can be further maintained, and the sealing performance of the gate valve can be effectively increased;
s4: after the gate valve is mechanically closed under the control of the control motor, the air exhaust pipe can be used for exhausting air in the gap between the two groups of valve plates to cause negative pressure, the sealing condition is detected through the pressure gauge, and timely overhaul or component replacement can be performed.
Compared with the prior art, the invention provides the wear-resistant knife gate valve with high sealing performance, which has the following beneficial effects:
1. this wear-resisting high leakproofness's knife gate valve through the sealing mechanism cooperation control assembly that sets up inside the valve body, can press from both sides tightly sealedly at the in-process control sealing washer that the valve body descends, and the sealing washer can compress tightly the gap between valve plate and the U type seal frame and seal, because of the in-process that descends at the valve plate, the valve plate does not carry out excessive friction with the sealing washer, so when guaranteeing the leakproofness, has effectively increaseed the wearability of sealing washer to first slip subassembly and the dual cooperation of second slip subassembly make sealed effect better.
2. This wear-resisting high leakproofness's knife gate valve through the auxiliary seal subassembly that sets up in the valve body bottom, starts through the decline of valve plate, and C type splint rotate because of one end pushes down, causes the one end of keeping away from the sliding seal pole to rotate, compresses tightly the locking to the installation sliding sleeve after rotating, can further keep sealing washer's pressure and deformation, can effectively increase the leakproofness of gate valve.
The device has the advantages that the parts which are not involved in the device are the same as or can be realized by adopting the prior art, the abrasion resistance of the gate valve is improved by reducing the friction between the valve plate and the sealing ring, and the dual sealing box is started to assist in fixing and sealing, so that the abrasion resistance and the sealing performance of the gate valve can be effectively improved.
Drawings
Fig. 1 is a schematic view of the appearance structure of a knife gate valve with wear resistance and high sealing performance;
fig. 2 is a schematic diagram of the appearance structure of a knife gate valve with wear resistance and high sealing performance;
FIG. 3 is a schematic diagram of a cross-sectional structure of a bracket housing of a knife gate valve with wear resistance and high sealing performance;
FIG. 4 is a schematic diagram showing a cross-sectional structure of a valve body of a knife gate valve with wear resistance and high sealing performance;
FIG. 5 is a schematic diagram showing a cross-sectional structure of a valve body of a knife gate valve with wear resistance and high sealing performance;
FIG. 6 is a schematic diagram III of a cross-sectional structure of a valve body of a knife gate valve with wear resistance and high sealing performance;
fig. 7 is a schematic diagram showing a cross-sectional structure of a valve body of a knife gate valve with wear resistance and high sealing performance;
fig. 8 is a schematic diagram of a cross-sectional structure of a valve body of a knife gate valve with wear resistance and high sealing performance;
fig. 9 is a schematic diagram showing a cross-sectional structure of a valve body of a knife gate valve with wear resistance and high sealing performance.
In the figure: 100. a seal housing; 101. a valve body; 102. a bracket housing; 103. a mounting plate; 104. a sliding valve tube; 105. a pressure gauge; 106. a drain pipe; 107. controlling a motor; 108. a screw rod; 109. a lifting plate; 110. a U-shaped sealing frame; 111. sealing grooves; 112. an exhaust pipe; 200. a valve plate; 201. a limit control frame; 202. limiting sliding grooves; 203. a backset groove; 204. installing a sliding sleeve; 205. a seal ring; 206. a sliding sleeve plate; 207. a guide strut; 208. a return spring; 209. a limit sliding column; 300. a floor frame; 301. pressing down the hole; 302. a sliding seal rod; 303. c-shaped clamping plates; 304. and pressing down the column.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1 to 9, a knife gate valve with wear resistance and high sealing performance comprises a sealing shell 100, a valve body 101, a bracket shell 102 connected to the top of the sealing shell 100, the valve body 101 connected to the top of the sealing shell 100, the sealing shell 100 being communicated with the inside of the valve body 101, and further comprises:
the sealing mechanism is arranged inside the valve body 101 and comprises a first sliding component and a second sliding component, the first sliding component is matched with the second sliding component, the first sliding component and the second sliding component both comprise sliding valve pipes 104, and the two groups of sliding valve pipes 104 are respectively connected to side walls at two ends of the valve body 101;
the auxiliary sealing assemblies are arranged at the bottom end inside the valve body 101, two groups of the auxiliary sealing assemblies are symmetrically arranged, and the two groups of the auxiliary sealing assemblies are matched with the sealing mechanism;
the control assembly is arranged inside the support shell 102 and comprises two groups of valve plates 200, the valve plates 200 are connected to the inner wall of the seal shell 100 in a sliding mode, and the control assembly is matched with the auxiliary sealing assembly and the seal mechanism through the valve plates 200.
The outer tube walls of the two groups of sliding valve tubes 104 are sleeved with a mounting sliding sleeve 204, the mounting sliding sleeve 204 is connected to the outer tube wall of the sliding valve tube 104 in a sliding manner, a sealing ring 205 is detachably arranged on one side, close to the valve plate 200, of the mounting sliding sleeve 204, and the mounting sliding sleeve 204 is matched with the valve plate 200 through the sealing ring 205.
The side walls of the two sides of the mounting sliding sleeve 204 are connected with sliding sleeve plates 206, the side walls of the sliding valve tube 104 are connected with guide sliding columns 207, the sliding sleeve plates 206 are slidably connected to the outer walls of the guide sliding columns 207, reset springs 208 are sleeved on the outer walls of the guide sliding columns 207, one ends of the reset springs 208 are connected to the side walls of the sliding sleeve plates 206, and one ends, far away from the sliding sleeve plates 206, of the reset springs 208 are connected to the side walls of the sliding valve tube 104.
The outer side wall of the sliding sleeve plate 206 is connected with a limiting sliding column 209, the side wall of the valve plate 200 is connected with a limiting control frame 201, a limiting sliding groove 202 is formed in the side wall of the limiting control frame 201, the limiting sliding column 209 is slidably connected to the inner wall of the limiting sliding groove 202, and a recession groove 203 is formed in the sealing shell 100 and matched with the limiting control frame 201.
The valve body 101 is internally provided with a U-shaped sealing frame 110, two groups of sealing grooves 111 are formed in the bottom of the U-shaped sealing frame 110, the two groups of sealing grooves 111 are matched with the two groups of valve plates 200 respectively, and a bottom plate frame 300 is arranged at the bottom of the U-shaped sealing frame 110.
The auxiliary sealing assembly comprises a pressing post 304, a sliding sealing rod 302 and a pressing hole 301, wherein the pressing hole 301 is formed in the bottom of the sealing groove 111, the pressing hole 301 penetrates through the U-shaped sealing frame 110 to be communicated with the bottom plate frame 300, the pressing post 304 is connected to the bottom of the valve plate 200, the sliding sealing rod 302 is connected to the inner wall of the pressing hole 301 in a sliding mode, and the pressing post 304 is matched with the pressing hole 301 and the sliding sealing rod 302 respectively.
The bottom inner wall of the bottom plate frame 300 is rotatably connected with a C-shaped clamping plate 303, one side of the C-shaped clamping plate 303, which is close to the bottom plate frame 300, is matched with the sliding sealing rod 302, and one end of the C-shaped clamping plate 303, which is far away from the sliding sealing rod 302, is matched with the mounting sliding sleeve 204.
The control assembly comprises a control motor 107, a screw rod 108 and a lifting plate 109, wherein the screw rod 108 is rotationally connected between the top plate and the bottom plate of the bracket shell 102, the lifting plate 109 is connected to the outer wall of the screw rod 108, the lifting plate 109 is provided with threads matched with the screw rod 108, the lifting plate 109 is connected to the tops of the two groups of valve plates 200, the control motor 107 is arranged at the top of the bracket shell 102, and the output end of the control motor 107 penetrates through the bracket shell 102 to be connected with the screw rod 108.
A drain pipe 106 is arranged at the bottom of the valve body 101, an exhaust pipe 112 is arranged between the two groups of sealing grooves 111, the exhaust pipe 112 penetrates through the outer wall of the valve body 101 to extend outwards, connecting threads are arranged at the ends of the drain pipe 106 and the exhaust pipe 112, a pressure gauge 105 is arranged on the outer wall of the sealing shell 100, and one end, far away from the valve plate 200, of the sliding valve pipe 104 is connected with a mounting disc 103.
When the device is used, the device is arranged at a specified position through the mounting disc 103, the exhaust pipe 112 is connected with the exhaust end of the air pump, the drain pipe 106 is provided with a switch and is connected with a drain pipe, and then the control motor 107 is started to perform closing control on the gate valve; when the control motor 107 is started to close the gate valve, the control motor 107 rotates to drive the screw rod 108 to rotate, the screw rod 108 rotates to drive the lifting plate 109 to descend through threads, the lifting plate 109 drives the two groups of valve plates 200 to descend, the two groups of valve plates 200 descend to drive the limit control frame 201 to descend, the limit control frame 201 drives the limit sliding column 209 to slide towards one side of the valve plate 200 through the limit sliding groove 202, the limit sliding column 209 drives the sliding sleeve plate 206 to slide on the outer wall of the guide sliding column 207 and drives the installation sliding sleeve 204 to slide towards one side of the valve plate 200 on the outer wall of the sliding valve pipe 104, the installation sliding sleeve 204 drives the sealing ring 205 to compress towards the direction of the valve plate 200, and the return spring 208 is in a stretching state in the process; when the valve plate 200 descends to the bottom, the sealing ring 205 compresses and seals the gap between the valve plate 200 and the U-shaped sealing frame 110, and because the valve plate 200 does not excessively rub with the sealing ring 205 in the descending process of the valve plate 200, the wear resistance of the sealing ring 205 is effectively increased while the sealing performance is ensured, meanwhile, the descending of the valve plate 200 to the bottom drives the descending column 304 to descend, the descending column 304 is inserted into the descending hole 301 and presses down the sliding sealing rod 302, the sliding sealing rod 302 slides down to press one end of the C-shaped clamping plate 303, the C-shaped clamping plate 303 rotates due to the pressing of one end, so that one end far away from the sliding sealing rod 302 rotates, and the installation sliding sleeve 204 is compressed and locked after the rotation, so that the pressure and the deformation of the sealing ring 205 can be further maintained, and the sealing performance of the gate valve can be effectively increased; when the gate valve is mechanically closed under the control of the control motor 107, the air suction pipe 112 can be used for sucking air in the gap between the two groups of valve plates 200 to generate negative pressure, the pressure gauge 105 can be used for detecting the sealing condition, and timely maintenance or component replacement can be performed.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (5)

1. The utility model provides a wear-resisting high leakproofness's knife gate valve, includes seal housing (100), valve body (101) and connects in support casing (102) at seal housing (100) top, valve body (101) connect in seal housing (100) top, seal housing (100) are linked together with valve body (101) inside, its characterized in that still includes:
the sealing mechanism is arranged inside the valve body (101) and comprises a first sliding component and a second sliding component, the first sliding component is matched with the second sliding component, the first sliding component and the second sliding component both comprise sliding valve pipes (104), and the two groups of sliding valve pipes (104) are respectively connected to side walls at two ends of the valve body (101);
the auxiliary sealing assemblies are arranged at the bottom end inside the valve body (101), two groups of the auxiliary sealing assemblies are symmetrically arranged, and the two groups of the auxiliary sealing assemblies are matched with the sealing mechanism;
the control assembly is arranged in the bracket shell (102) and comprises two groups of valve plates (200), the valve plates (200) are connected to the inner wall of the sealing shell (100) in a sliding manner, and the control assembly is matched with the auxiliary sealing assembly and the sealing mechanism through the valve plates (200);
the two groups of outer tube walls of the sliding valve tubes (104) are sleeved with mounting sliding sleeves (204), the mounting sliding sleeves (204) are connected to the outer tube walls of the sliding valve tubes (104) in a sliding mode, sealing rings (205) are detachably arranged on one sides, close to the valve plates (200), of the mounting sliding sleeves (204), and the mounting sliding sleeves (204) are matched with the valve plates (200) through the sealing rings (205);
the two side walls of the mounting sliding sleeve (204) are connected with sliding sleeve plates (206), the side walls of the sliding valve pipe (104) are connected with guide sliding columns (207), the sliding sleeve plates (206) are connected to the outer walls of the guide sliding columns (207) in a sliding mode, reset springs (208) are sleeved on the outer walls of the guide sliding columns (207), one ends of the reset springs (208) are connected to the side walls of the sliding sleeve plates (206), and one ends, far away from the sliding sleeve plates (206), of the reset springs (208) are connected to the side walls of the sliding valve pipe (104);
the outer side wall of the sliding sleeve plate (206) is connected with a limiting sliding column (209), the side wall of the valve plate (200) is connected with a limiting control frame (201), a limiting sliding groove (202) is formed in the side wall of the limiting control frame (201), the limiting sliding column (209) is connected to the inner wall of the limiting sliding groove (202) in a sliding mode, and a relief groove (203) is formed in the sealing shell (100) and matched with the limiting control frame (201);
the auxiliary airtight assembly comprises a pressing post (304), a sliding sealing rod (302) and a pressing hole (301), wherein the pressing hole (301) is formed in the bottom of the sealing groove (111), the pressing hole (301) penetrates through the U-shaped sealing frame (110) to be communicated with the bottom plate frame (300), the pressing post (304) is connected to the bottom of the valve plate (200), the sliding sealing rod (302) is connected to the inner wall of the pressing hole (301) in a sliding mode, and the pressing post (304) is matched with the pressing hole (301) and the sliding sealing rod (302) respectively;
the bottom inner wall of the bottom plate frame (300) is rotationally connected with a C-shaped clamping plate (303), one side, close to the bottom plate frame (300), of the C-shaped clamping plate (303) is matched with the sliding sealing rod (302), and one end, far away from the sliding sealing rod (302), of the C-shaped clamping plate (303) is matched with the installation sliding sleeve (204).
2. The wear-resistant high-tightness knife gate valve according to claim 1, wherein a U-shaped sealing frame (110) is arranged inside the valve body (101), two groups of sealing grooves (111) are formed in the bottom of the U-shaped sealing frame (110), the two groups of sealing grooves (111) are respectively matched with the two groups of valve plates (200), and a bottom plate frame (300) is arranged at the bottom of the U-shaped sealing frame (110).
3. The knife gate valve with wear resistance and high sealing performance according to claim 1, wherein the control assembly comprises a control motor (107), a screw rod (108) and a lifting plate (109), the screw rod (108) is rotatably connected between a top plate and a bottom plate of the support shell (102), the lifting plate (109) is connected to the outer wall of the screw rod (108), the lifting plate (109) is provided with threads and is matched with the screw rod (108), the lifting plate (109) is connected to the tops of two groups of valve plates (200), the control motor (107) is mounted on the top of the support shell (102), and the output end of the control motor (107) penetrates through the support shell (102) to be connected with the screw rod (108).
4. A wear-resistant high-tightness knife gate valve according to claim 3, wherein a drain pipe (106) is installed at the bottom of the valve body (101), an exhaust pipe (112) is arranged between two groups of sealing grooves (111), the exhaust pipe (112) extends outwards through the outer wall of the valve body (101), connecting threads are arranged at the ends of the drain pipe (106) and the exhaust pipe (112), a pressure gauge (105) is installed on the outer wall of the sealing shell (100), and a mounting disc (103) is connected to one end, far away from the valve plate (200), of the sliding valve pipe (104).
5. The method for using the wear-resistant high-tightness knife gate valve as claimed in claim 4, comprising the following steps:
s1: when the device is used, the device is arranged at a designated position through the mounting disc (103), the exhaust pipe (112) is connected with the exhaust end of the air pump, the drain pipe (106) is provided with a switch and is connected with a drain pipe, and then the gate valve can be closed by starting the control motor (107);
s2: when the control motor (107) is started to close the gate valve, the control motor (107) rotates to drive the screw rod (108) to rotate, the screw rod (108) rotates to drive the lifting plate (109) to descend through threads, the lifting plate (109) drives two groups of valve plates (200) to descend, the two groups of valve plates (200) descend to drive the limit control frame (201) to descend, the limit control frame (201) drives the limit sliding column (209) to slide towards one side of the valve plate (200) through the limit sliding groove (202), the limit sliding column (209) drives the sliding sleeve plate (206) to slide on the outer wall of the guide sliding column (207) and drives the installation sliding sleeve (204) to slide towards one side of the valve plate (200) on the outer wall of the sliding valve tube (104), the installation sliding sleeve (204) drives the sealing ring (205) to compress towards the direction of the valve plate (200), and the return spring (208) is in the process of stretching;
s3: when the valve plate (200) descends to the bottom, the sealing ring (205) compresses and seals a gap between the valve plate (200) and the U-shaped sealing frame (110), and because the valve plate (200) and the sealing ring (205) do not excessively rub in the descending process of the valve plate (200), the abrasion resistance of the sealing ring (205) is effectively improved while the sealing performance is ensured, meanwhile, the descending of the valve plate (200) to the bottom drives the descending column (304) to descend, the descending column (304) is inserted into the descending hole (301) and presses the sliding sealing rod (302), the sliding sealing rod (302) downwards slides to press one end of the C-shaped clamping plate (303), the C-shaped clamping plate (303) downwards presses and rotates due to the fact that one end of the sliding sealing rod (302) is far away, and after the rotation, the sealing sleeve (204) is compressed and locked, the pressure and deformation of the sealing ring (205) can be further maintained, and the sealing performance of the gate valve can be effectively increased;
s4: after the gate valve is mechanically closed under the control of the control motor (107), the gap between the two groups of valve plates (200) can be pumped through the pumping pipe (112) to cause negative pressure, the sealing condition is detected through the pressure gauge (105), and timely overhaul or component replacement can be performed.
CN202210926132.1A 2022-08-03 2022-08-03 Wear-resistant high-tightness knife gate valve and use method thereof Active CN115451146B (en)

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CN116221419B (en) * 2023-03-20 2023-08-22 秦皇岛精佳易达环保科技有限公司 Flat push valve for mechanical seal type hot air pipeline
CN117307741B (en) * 2023-11-29 2024-02-06 汇舸(南通)环保设备有限公司 Flue gas valve with self-checking function

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CN102563112B (en) * 2011-12-31 2014-04-23 肇庆市腾胜真空技术工程有限公司 Vacuum gate valve for vacuum chambers
CN204717031U (en) * 2015-08-13 2015-10-21 哈电集团哈尔滨电站阀门有限公司 Novel parallel double-flashboard electric gate valve
CN106090273B (en) * 2016-06-20 2018-08-17 中一节能耐磨技术宜兴有限公司 A kind of ceramics double disc inlet valve
CN108757973B (en) * 2018-08-16 2023-11-14 北京航天石化技术装备工程有限公司 Double-flashboard gate valve
CN112728145A (en) * 2020-12-21 2021-04-30 何松 Double-sided gate valve

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