CN115451146A - Wear-resistant high-sealing-performance knife gate valve and using method thereof - Google Patents
Wear-resistant high-sealing-performance knife gate valve and using method thereof Download PDFInfo
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- CN115451146A CN115451146A CN202210926132.1A CN202210926132A CN115451146A CN 115451146 A CN115451146 A CN 115451146A CN 202210926132 A CN202210926132 A CN 202210926132A CN 115451146 A CN115451146 A CN 115451146A
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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
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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
- 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
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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
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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
- 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
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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
- 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
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- 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
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
The invention discloses a wear-resistant high-sealing knife-shaped gate valve and a using method thereof, and belongs to the field of knife-shaped gate valves. The utility model provides a knife gate valve of wear-resisting high leakproofness, 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 assembly and a second sliding assembly; the auxiliary sealing assemblies are arranged at the bottom end in the valve body and are symmetrically arranged in two groups, 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, the valve plates are connected to the inner wall of the sealing shell in a sliding mode, and the control assembly is matched with the auxiliary sealing assembly and the sealing mechanism through the valve plates; the wear resistance of the gate valve is improved by reducing the friction between the valve plate and the sealing ring, and the double sealing boxes are started to assist in fixing and sealing, so that the wear resistance and the sealing property of the gate valve can be effectively improved.
Description
Technical Field
The invention relates to the technical field of knife-shaped gate valves, in particular to a wear-resistant knife-shaped gate valve with high sealing property and a using method thereof.
Background
With the rapid development of social economy, pipeline transportation is getting larger and larger, so that the knife gate valve is used more and more, and the knife gate valve is formed by changing a flat plate valve plate into a knife valve plate on the basis of a common gate valve; the knife gate valve solves the problems of large flow resistance, large weight, difficult installation, large occupied area and the like of valves such as a common gate valve, a flat gate valve, a ball valve, a stop valve, a regulating valve, a butterfly valve 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 rising stem knife gate valve and a hidden stem knife gate valve according to the thread position of a valve rod.
Through retrieval, the patent with the publication number of CN214743434U discloses a novel wear-resistant knife-type gate valve, which comprises a support, a valve plate, a valve seat, a valve rod nut, a valve rod, a hand wheel, a wear-resistant connecting block, a knife-type gate plate and a wear-resistant sealing assembly, wherein the valve plate is arranged below the support, the valve seat is arranged below the valve plate, the valve rod nut is arranged on the support, the valve rod is rotatably arranged in the valve rod nut, the valve rod rotatably penetrates through the top wall of the support, the hand wheel is arranged on the valve rod, the wear-resistant connecting block is arranged below the valve rod, the knife-type gate plate penetrates through the top wall of the valve plate and is arranged below the wear-resistant connecting block, and the wear-resistant sealing assembly is arranged on the outer side wall of the knife-type gate plate; 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 embodied, and in addition, the service life of the sealing air cushion is short, so that the device still has the defects.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, when the gate valve is used, the closing valve plate and the sealing valve plate are operated separately, so that the operation steps are complex, the sealing effect cannot be quickly and effectively embodied, and the service life of a sealing air cushion is short.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a knife gate valve of wear-resisting high leakproofness, includes seal housing, valve body and connects in the support casing at seal housing top, the valve body is connected in the seal housing top, seal housing is linked together with the valve body is inside, still includes:
the sealing mechanism is arranged in the valve body and comprises a first sliding assembly and a second sliding assembly, the first sliding assembly is matched with the second sliding assembly, the first sliding assembly and the second sliding assembly respectively comprise sliding valve pipes, and the two groups of sliding valve pipes are respectively connected to the side walls of the two ends of the valve body;
the auxiliary sealing assemblies are arranged at the bottom end in the valve body and are symmetrically arranged in two groups, and the two groups of 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, the valve plates are connected to the inner wall of the sealing shell in a sliding mode, and the control assembly is matched with the auxiliary sealing assembly and the sealing mechanism through the valve plates.
Preferably, two sets of slide valve outside of tubes pipe wall has all cup jointed the installation sliding sleeve, installation sliding sleeve sliding connection is in slide valve outside of tubes pipe wall, the one side demountable installation that the installation sliding sleeve is close to the valve plate has the sealing washer, the installation sliding sleeve cooperatees with the valve plate through the sealing washer.
Preferably, the installation sliding sleeve both sides lateral wall all is connected with the slip lagging, the slide valve pipe lateral wall is connected with the direction traveller, slip lagging sliding connection is in direction traveller outer wall, reset spring has been cup jointed to the direction traveller outer wall, reset spring one end is connected in slip lagging lateral wall and is connected, reset spring keeps away from the one end of slip lagging and connects in slide valve pipe lateral wall.
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 backing groove matched with the limiting control frame is formed in the sealing shell.
Preferably, the inside U type seal holder that is provided with of valve body, U type seal holder bottom is provided with two sets of seal grooves, and two sets of seal grooves cooperate with two sets of valve plates respectively, U type seal holder bottom is provided with the bottom plate frame.
Preferably, sealed auxiliary assembly is including pushing down plunger, sliding seal pole and pushing down the hole, the sealed tank bottom is seted up in the hole of pushing down, the hole of pushing down passes the sealed frame of U type and is linked together with the bottom plate frame, the plunger is connected in the valve plate bottom down, sliding seal pole sliding connection is in pushing down downthehole wall, the plunger cooperatees with pushing down hole and sliding seal pole respectively down.
Preferably, the inner wall of bottom plate frame bottom rotates and is connected with C type splint, one side that C type splint are close to the bottom plate frame cooperatees with the sliding seal pole, the one end that the sliding seal pole was kept away from to C type splint cooperatees with the installation sliding sleeve.
Preferably, the control assembly comprises a control motor, a screw rod and a lifting plate, the screw rod is connected between a top plate and a bottom plate of the support shell in a rotating mode, the lifting plate is connected to the outer wall of the screw rod and provided with threads matched with the screw rod, the lifting plate is connected to the tops of the two groups of valve plates, the control motor is installed at 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, a water drain pipe is installed at the bottom of the valve body, an exhaust pipe is arranged between the two groups of sealing grooves, the exhaust pipe penetrates through the outer wall of the valve body to extend outwards, connecting threads are arranged at the end parts of the water drain pipe and the exhaust pipe, a pressure gauge is installed on the outer wall of the sealing shell, and one end, away from the valve plate, of the sliding valve pipe is connected with a mounting disc.
The use method of the wear-resistant knife-type gate valve with high sealing performance 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 to the exhaust end of the air pump, the drain pipe is provided with the switch and is connected with the drain pipe, and then the control motor is started to carry out closing control on the gate valve;
s2: when a control motor is started to close a gate valve, the control motor rotates to drive a lead screw to rotate, the lead screw rotates to drive a lifting plate to descend through threads, the lifting plate descends to drive two groups of valve plates to descend, the two groups of valve plates descend to drive a limiting control frame to descend, the limiting control frame drives a limiting sliding column to slide to one side of the valve plate through a limiting sliding chute, the limiting sliding column drives a sliding sleeve plate to slide on the outer wall of a guiding sliding column and drives an installation sliding sleeve to slide to one side of the valve plate on the outer pipe wall of a sliding valve pipe, the installation sliding sleeve side drives a sealing ring to compress the valve plate, and a reset spring is in a stretching state in the process;
s3: when the valve plate moves downwards to the bottom, the sealing ring can compress and seal a gap between the valve plate and the U-shaped sealing frame, and the valve plate does not excessively rub against the sealing ring 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 valve plate moves downwards to the bottom to drive the pressing column to descend, the pressing column is inserted into the pressing hole and presses down the sliding sealing rod, the sliding sealing rod slides downwards to press one end of the C-shaped clamping plate, the C-shaped clamping plate rotates due to the pressing of one end, so that one end far away from the sliding sealing rod rotates, and the mounting sliding sleeve is compressed and locked after the C-shaped clamping plate rotates, so that the pressure and the deformation of the sealing ring can be further kept, and the sealing performance of the gate valve can be effectively improved;
s4: after the gate valve is mechanically closed under the control of the control motor, the gap between the two groups of valve plates can be pumped by the exhaust tube to generate negative pressure, the sealing condition is detected by the pressure gauge, and timely maintenance or part replacement can be carried out.
Compared with the prior art, the invention provides a wear-resistant high-sealing knife gate valve, which has the following beneficial effects:
1. this wear-resisting high leakproofness's sword type gate valve, through the sealing mechanism cooperation control assembly that sets up in valve body inside, can press from both sides tight the sealing washer at the in-process control sealing washer that the valve body descends, the sealing washer can compress tightly sealedly to the gap between valve plate and the U type seal holder, because of at the in-process that the valve plate descends, the valve plate does not carry out excessive friction with the sealing washer, consequently when guaranteeing the leakproofness, the wearability of sealing washer has effectively been increaseed, and state first slip subassembly and the dual cooperation of second slip subassembly, make sealed effect better.
2. This wear-resisting high leakproofness's sword type gate valve through the supplementary seal assembly who sets up in valve body bottom, starts through the decline of valve plate, and C type splint take place to 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 the pressure and the deformation volume of sealing washer, can effectively increase the leakproofness of gate valve.
The parts which are not involved in the device are the same as or can be realized by adopting the prior art, the wear 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 wear resistance and the sealing property of the gate valve can be effectively improved.
Drawings
Fig. 1 is a first schematic view of an appearance structure of a wear-resistant high-sealing knife gate valve according to the present invention;
FIG. 2 is a schematic structural diagram of an appearance of a knife gate valve with high sealing performance and wear resistance according to the present invention;
FIG. 3 is a schematic cross-sectional view of a housing of a knife gate valve with high sealing performance and wear resistance according to the present invention;
fig. 4 is a first schematic sectional view of a valve body of a wear-resistant high-sealing knife gate valve according to the present invention;
FIG. 5 is a schematic sectional view of a valve body of a knife gate valve with high sealing performance and wear resistance according to the present invention;
FIG. 6 is a schematic cross-sectional view of a valve body of a knife gate valve with high wear resistance and high sealing performance according to the present invention;
FIG. 7 is a schematic cross-sectional view of a valve body of a knife gate valve with high sealing performance and wear resistance according to the present invention;
FIG. 8 is a schematic cross-sectional view of a valve body of a knife gate valve with high sealing performance and wear resistance according to a fifth embodiment of the present invention;
fig. 9 is a sixth schematic sectional view of a valve body of the knife gate valve with wear resistance and high sealing performance according to the present invention.
In the figure: 100. sealing the housing; 101. a valve body; 102. a bracket housing; 103. mounting a disc; 104. a sliding valve tube; 105. a pressure gauge; 106. a drain pipe; 107. controlling the motor; 108. a screw rod; 109. a lifting plate; 110. a U-shaped seal frame; 111. a sealing groove; 112. an air exhaust pipe; 200. a valve plate; 201. a limiting control frame; 202. a limiting chute; 203. a withdrawal 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 limiting sliding column; 300. a bottom plate frame; 301. pressing the hole downwards; 302. sliding the sealing rod; 303. c-shaped splints; 304. and (5) pressing the column.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 to 9, a wear-resistant knife gate valve with high sealing performance includes a seal housing 100, a valve body 101 and a support housing 102 connected to the top of the seal housing 100, the valve body 101 is connected to the top of the seal housing 100, and the seal housing 100 is communicated with the inside of the valve body 101, and further includes:
the sealing mechanism is arranged inside the valve body 101 and comprises a first sliding assembly and a second sliding assembly, the first sliding assembly is matched with the second sliding assembly, the first sliding assembly and the second sliding assembly respectively comprise sliding valve pipes 104, and the two groups of sliding valve pipes 104 are respectively connected to the side walls of the 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 auxiliary sealing assemblies are symmetrically arranged, and the two groups of auxiliary sealing assemblies are matched with the sealing mechanism;
and 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 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 outer pipe wall of the two sets of sliding valve pipes 104 is sleeved with a mounting sliding sleeve 204, the mounting sliding sleeve 204 is connected with the outer pipe wall of the sliding valve pipe 104 in a sliding mode, a sealing ring 205 is detachably mounted 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 installation sliding sleeve 204 are both connected with sliding sleeve plates 206, the side wall of the sliding valve pipe 104 is connected with a guide sliding column 207, the sliding sleeve plates 206 are connected to the outer wall of the guide sliding column 207 in a sliding manner, the outer wall of the guide sliding column 207 is sleeved with a return spring 208, one end of the return spring 208 is connected to the side wall of the sliding sleeve plate 206 in a sliding manner, and the end, away from the sliding sleeve plate 206, of the return spring 208 is connected to the side wall of the sliding valve pipe 104.
The lateral wall of sliding sleeve plate 206 is connected with spacing traveller 209, and the valve plate 200 lateral wall is connected with spacing control frame 201, and spacing spout 202 has been seted up to spacing control frame 201 lateral wall, and spacing traveller 209 sliding connection is in spacing spout 202 inner wall, and sealed housing 100 is inside to be provided with to move back a groove 203 and cooperate with spacing control frame 201.
The valve body 101 is internally provided with a U-shaped sealing frame 110, the bottom of the U-shaped sealing frame 110 is provided with two groups of sealing grooves 111, the two groups of sealing grooves 111 are respectively matched with the two groups of valve plates 200, and the bottom of the U-shaped sealing frame 110 is provided with a bottom plate frame 300.
The sealing auxiliary assembly comprises a lower pressing column 304, a sliding sealing rod 302 and a lower pressing hole 301, the lower pressing hole 301 is formed in the bottom of the sealing groove 111, the lower pressing hole 301 penetrates through the U-shaped sealing frame 110 to be communicated with the bottom plate frame 300, the lower pressing column 304 is connected to the bottom of the valve plate 200, the sliding sealing rod 302 is slidably connected to the inner wall of the lower pressing hole 301, and the lower pressing column 304 is matched with the lower pressing hole 301 and the sliding sealing rod 302 respectively.
The inner wall of the bottom plate frame 300 is rotatably connected with a C-shaped clamp plate 303, one side of the C-shaped clamp plate 303 close to the bottom plate frame 300 is matched with the sliding sealing rod 302, and one end of the C-shaped clamp plate 303 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, the screw rod 108 is rotatably connected between the top plate and the 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 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 installed at 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.
A water drain pipe 106 is installed at the bottom of the valve body 101, an air exhaust pipe 112 is arranged between the two groups of sealing grooves 111, the air exhaust pipe 112 penetrates through the outer wall of the valve body 101 to extend outwards, connecting threads are arranged at the end parts of the water drain pipe 106 and the air 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, away from the valve plate 200, of the sliding valve pipe 104.
When the device is used, the device is arranged at a designated position through the mounting disc 103, the air exhaust pipe 112 is connected to the air 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 carry out 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 descends to drive the two groups of valve plates 200 to descend, the two groups of valve plates 200 descend to drive the limiting control frame 201 to descend, the limiting control frame 201 drives the limiting sliding column 209 to slide towards one side of the valve plate 200 through the limiting sliding chute 202, the limiting sliding column 209 drives the sliding sleeve plate 206 to slide on the outer wall of the guiding sliding column 207 and drives the mounting sliding sleeve 204 to slide towards one side of the valve plate 200 on the outer wall of the sliding valve pipe 104, the mounting sliding sleeve 204 side drives the sealing ring 205 to compress towards the valve plate 200, and the reset 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 a gap between the valve plate 200 and the U-shaped sealing frame 110, and in the descending process of the valve plate 200, the valve plate 200 does not excessively rub the sealing ring 205, so that the wear resistance of the sealing ring 205 is effectively improved while the sealing performance is ensured, meanwhile, the valve plate 200 descends to the bottom to drive the lower pressing post 304 to descend, the lower pressing post 304 is inserted into the lower pressing hole 301 and presses the sliding sealing rod 302 downwards, the sliding sealing rod 302 slides downwards to press one end of the C-shaped clamping plate 303, the C-shaped clamping plate 303 rotates due to the fact that one end of the C-shaped clamping plate is pressed downwards, one end far away from the sliding sealing rod 302 rotates, the mounting sliding sleeve 204 is compressed and locked after the rotation, 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 improved; after the gate valve is mechanically closed under the control of the control motor 107, the gap between the two valve plates 200 can be evacuated through the exhaust tube 112 to generate negative pressure, the sealing condition can be detected through the pressure gauge 105, and timely maintenance or component replacement can be performed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a knife gate valve of wear-resisting high leakproofness, 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) is 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 assembly and a second sliding assembly, the first sliding assembly is matched with the second sliding assembly, the first sliding assembly and the second sliding assembly respectively comprise sliding valve pipes (104), and the two groups of sliding valve pipes (104) are respectively connected to the side walls of the two ends of the valve body (101);
the auxiliary sealing assemblies are arranged at the bottom end of the interior of the valve body (101), 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 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 sealing shell (100) in a sliding mode, and the control assembly is matched with the auxiliary sealing assembly and the sealing mechanism through the valve plates (200).
2. The wear-resistant knife gate valve with high sealing performance according to claim 1, wherein a mounting sliding sleeve (204) is sleeved on the outer pipe wall of the two sets of sliding valve pipes (104), the mounting sliding sleeve (204) is slidably connected to the outer pipe wall of the sliding valve pipes (104), a sealing ring (205) is detachably mounted on one side of the mounting sliding sleeve (204) close to the valve plate (200), and the mounting sliding sleeve (204) is matched with the valve plate (200) through the sealing ring (205).
3. The knife gate valve of claim 2, wherein the side walls of the two sides of the installation sliding sleeve (204) are both connected with a sliding sleeve plate (206), the side wall of the sliding valve tube (104) is connected with a guiding sliding column (207), the sliding sleeve plate (206) is slidably connected to the outer wall of the guiding sliding column (207), the outer wall of the guiding sliding column (207) is sleeved with a return spring (208), one end of the return spring (208) is connected to the side wall of the sliding sleeve plate (206), and the end of the return spring (208) away from the sliding sleeve plate (206) is connected to the side wall of the sliding valve tube (104).
4. The knife gate valve of claim 3, wherein a limiting slide column (209) is connected to an outer side wall of the sliding sleeve plate (206), a limiting control frame (201) is connected to a side wall of the valve plate (200), a limiting slide groove (202) is formed in a side wall of the limiting control frame (201), the limiting slide column (209) is slidably connected to an inner wall of the limiting slide groove (202), and a retreating groove (203) is formed in the sealing shell (100) and is matched with the limiting control frame (201).
5. The wear-resistant knife gate valve with high sealing performance according to claim 1, characterized in that a U-shaped sealing frame (110) is arranged inside the valve body (101), two sets of sealing grooves (111) are arranged at the bottom of the U-shaped sealing frame (110), the two sets of sealing grooves (111) are respectively matched with the two sets of valve plates (200), and a bottom plate frame (300) is arranged at the bottom of the U-shaped sealing frame (110).
6. The knife gate valve of claim 1, wherein the sealing auxiliary assembly comprises a lower pressing column (304), a sliding sealing rod (302) and a lower pressing hole (301), the lower pressing hole (301) is formed at the bottom of the sealing groove (111), the lower pressing hole (301) is communicated with the bottom plate frame (300) through the U-shaped sealing frame (110), the lower pressing column (304) is connected to the bottom of the valve plate (200), the sliding sealing rod (302) is slidably connected to the inner wall of the lower pressing hole (301), and the lower pressing column (304) is respectively matched with the lower pressing hole (301) and the sliding sealing rod (302).
7. The knife gate valve of claim 6, characterized in that a C-shaped clamp plate (303) is rotatably connected to the bottom inner wall of the bottom plate frame (300), one side of the C-shaped clamp plate (303) close to the bottom plate frame (300) is matched with the sliding seal rod (302), and one end of the C-shaped clamp plate (303) far away from the sliding seal rod (302) is matched with the mounting sliding sleeve (204).
8. The wear-resistant knife gate valve with high sealing performance according to claim 1, characterized in that 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 the top plate and the 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 to match with the screw rod (108), the lifting plate (109) is connected to the tops of the two sets of valve plates (200), the control motor (107) is installed at 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).
9. The knife gate valve of claim 1, characterized in that a drain pipe (106) is installed at the bottom of the valve body (101), an air suction pipe (112) is disposed between the two sets of sealing grooves (111), the air suction pipe (112) extends outwards through the outer wall of the valve body (101), the ends of the drain pipe (106) and the air suction pipe (112) are provided with connecting threads, a pressure gauge (105) is installed on the outer wall of the sealing housing (100), and one end of the sliding valve pipe (104) away from the valve plate (200) is connected with a mounting disc (103).
10. The use of a wear-resistant high-sealing knife gate valve as claimed in any one of claims 1 to 9, comprising the steps of:
s1: when the device is used, the device is arranged at a designated position through the mounting disc (103), the air exhaust pipe (112) is connected to the air 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 carry out closing control on the gate valve;
s2: when a control motor (107) is started to close a gate valve, the control motor (107) rotates to drive a lead screw (108) to rotate, the lead screw (108) rotates to drive a lifting plate (109) to descend through threads, the lifting plate (109) descends to drive two groups of valve plates (200) to descend, the two groups of valve plates (200) descend to drive a limiting control frame (201) to descend, the limiting control frame (201) drives a limiting sliding column (209) to slide towards one side of the valve plates (200) through a limiting sliding chute (202), the limiting sliding column (209) drives a sliding sleeve plate (206) to slide on the outer wall of a guiding sliding column (207) and drives an installation sliding sleeve (204) to slide towards one side of the valve plates (200) on the outer wall of a sliding valve pipe (104), the installation sliding sleeve (204) drives a sealing ring (205) to compress towards the direction of the valve plates (200), and a reset spring (208) is in a stretching state in the process;
s3: when the valve plate (200) descends to the bottom, the sealing ring (205) can compress and seal a gap between the valve plate (200) and the U-shaped sealing frame (110), excessive friction is not performed between the valve plate (200) and the sealing ring (205) 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 guaranteed, meanwhile, the valve plate (200) descends to the bottom to drive the lower pressing column (304) to descend, the lower pressing column (304) is inserted into the lower pressing hole (301) and presses down the sliding sealing rod (302), the sliding sealing rod (302) slides downwards to press one end of the C-shaped clamping plate (303), the C-shaped clamping plate (303) rotates due to the fact that one end of the C-shaped clamping plate is pressed downwards, the end far away from the sliding sealing rod (302) rotates, the mounting sliding sleeve (204) is compressed and locked after rotation, the pressure and the deformation of the sealing ring (205) can be further kept, and the sealing performance of the gate valve can be effectively improved;
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 by the air pumping pipe (112) to generate negative pressure, the sealing condition is detected by the pressure gauge (105), and timely overhaul or part replacement can be carried out.
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| CN202210926132.1A CN115451146B (en) | 2022-08-03 | 2022-08-03 | Wear-resistant high-tightness knife gate valve and use method thereof |
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| CN202210926132.1A CN115451146B (en) | 2022-08-03 | 2022-08-03 | Wear-resistant high-tightness knife gate valve and use method thereof |
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| CN115451146A true CN115451146A (en) | 2022-12-09 |
| CN115451146B CN115451146B (en) | 2023-05-16 |
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| CN117967819A (en) * | 2024-03-28 | 2024-05-03 | 天津市塘沽第一阀门有限公司 | High-pressure wear-resistant gate valve |
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| CN115451146B (en) | 2023-05-16 |
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