CN111998087B - Knife-shaped gate valve - Google Patents
Knife-shaped gate valve Download PDFInfo
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- CN111998087B CN111998087B CN202010874014.1A CN202010874014A CN111998087B CN 111998087 B CN111998087 B CN 111998087B CN 202010874014 A CN202010874014 A CN 202010874014A CN 111998087 B CN111998087 B CN 111998087B
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- valve
- rotating shaft
- bevel gear
- cavity
- sealing ring
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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
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
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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
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
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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
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a knife-shaped gate valve, which comprises a valve body and a valve seat arranged at the bottom of the valve body, and is characterized in that a valve cavity with openings at the upper end and the lower end is arranged in the valve body, the left side of the valve body is provided with a left valve port communicated with the valve cavity, and the right side of the valve body is provided with a right valve port communicated with the valve cavity; the left valve port and the right valve port are coaxially arranged; a valve cover is fixedly arranged at an opening at the upper end of the valve cavity, and a knife switch for controlling the on-off of the left valve port and the right valve port is connected in the valve cover in a sliding manner; the upper end of the valve body is provided with a driving component for driving the knife switch to move up and down; a bottom cavity communicated with the valve cavity is arranged in the valve seat; a sewage outlet communicated with the bottom cavity is formed in the side face of the valve seat, a cleaning assembly is arranged in the bottom cavity and used for discharging sediment in the bottom cavity from the sewage outlet, and a transmission assembly is arranged between the driving assembly and the cleaning assembly; the knife-shaped gate valve is simple in structure, reliable in closing and long in service life.
Description
Technical Field
The invention belongs to the technical field of pipeline valves, and particularly relates to a knife gate valve.
Background
The knife gate valve is based on the common gate valve, and the flat plate valve plate is changed into a knife-shaped valve plate. 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 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. When the medium of the knife gate valve sold in the current market is slurry, the knife gate valve closes the valve plate and pushes away the sealing element to move downwards, and meanwhile, silt in the pipe can enter the bottom space of the knife gate valve through the separated sealing element, so that the knife gate plate cannot be completely closed, and the working performance of the knife gate valve is influenced.
Disclosure of Invention
The invention aims to provide a knife-shaped gate valve which is simple in structure, can be reliably closed and is long in service life.
In order to achieve the purpose, the invention provides the following technical scheme:
a knife gate valve comprises a valve body and a valve seat arranged at the bottom of the valve body, wherein a valve cavity with openings at the upper end and the lower end is arranged in the valve body, a left valve port communicated with the valve cavity is arranged at the left side of the valve body, and a right valve port communicated with the valve cavity is arranged at the right side of the valve body; the left valve port and the right valve port are coaxially arranged; a valve cover is fixedly arranged at an opening at the upper end of the valve cavity, and a knife switch for controlling the on-off of the left valve port and the right valve port is connected in the valve cover in a sliding manner; the upper end of the valve body is provided with a driving component for driving the knife switch to move up and down; a bottom cavity communicated with the valve cavity is arranged in the valve seat; the side of disk seat is equipped with the drain with the die cavity intercommunication, be equipped with the clearance subassembly in the die cavity, the clearance subassembly is used for discharging the deposit in the die cavity by the drain, be equipped with drive assembly between drive assembly and the clearance subassembly, drive assembly is used for when the plug-in strip downstream, and the drive assembly work of drive clearance subassembly.
Further, a left sealing ring is fixedly installed at the left valve port, and a right sealing ring is fixedly installed at the right valve port; when the gate valve is completely opened, the knife switch leaves between the left sealing ring and the right sealing ring, and the left sealing ring and the right sealing ring are tightly attached to each other; when the gate valve is closed, the knife switch is inserted between the left sealing ring and the right sealing ring, the left sealing ring is deformed and tightly attached to the left side of the knife switch, and the right sealing ring is deformed and tightly attached to the right side of the knife switch.
Furthermore, the driving assembly comprises an internal thread sleeve, the upper end of the valve body is provided with a door-shaped frame, the internal thread sleeve is rotatably connected to the upper end of the door-shaped frame, a lead screw is connected to the internal thread sleeve in a threaded manner, and the lower end of the lead screw is fixedly connected with the upper end of the knife switch; the outer side of the internal thread sleeve is fixedly provided with a hand wheel used for driving the internal thread sleeve to rotate, and when the internal thread sleeve is rotated, the lead screw drives the knife switch to move up and down.
Furthermore, the cleaning assembly comprises a first rotating shaft which is rotatably connected in the valve seat, one end of the first rotating shaft is positioned in the bottom cavity and is provided with a rotating disc, the outer side of the circumference of the rotating disc is provided with a transmission ring along the axial extension of the first rotating shaft, and the transmission ring is internally provided with a power port; the other end of the first rotating shaft extends out of the valve seat and is provided with a first belt pulley; a second rotating shaft is rotatably connected to the side wall of the valve seat opposite to the first rotating shaft and is positioned above the first rotating shaft, and a push plate positioned in the power port is arranged at one end, extending into the bottom cavity, of the second rotating shaft; an annular cutting groove is formed in the outer side of one end of the first rotating shaft on the end face of the first belt wheel, a connecting block located in the annular cutting groove is fixedly installed at one end of the first rotating shaft, a ratchet groove is formed in the inner side wall of the annular cutting groove in the axial direction, a notch is formed in the outer side of the circumference of the connecting block, a pawl is arranged in the notch, and a spring piece used for forcing the pawl to extend into the ratchet groove is arranged in the notch; when the knife switch moves downwards, the first belt pulley drives the first rotating shaft to rotate; when the knife switch moves upwards, the first belt wheel idles; when the first rotating shaft drives the power port on the transmission ring to rotate to the highest position, the push plate extends out of the power port for the longest time; when the power port on the first rotating shaft driving transmission ring rotates to the lowest position, the push plate retracts into the power port.
Further, the transmission assembly comprises a first transmission shaft, a second transmission shaft and a third transmission shaft; an upper supporting rod is arranged at the upper end of the door-shaped frame, and a lower supporting rod is arranged on the side surface of the valve seat; the first transmission shaft is rotatably connected to the upper support rod and is perpendicular to the screw rod; the second transmission shaft is rotatably connected in the valve body and is parallel to the screw rod; the third transmission shaft is rotatably connected to the lower support rod and is perpendicular to the first transmission shaft and the second transmission shaft; the hand wheel is fixedly provided with a first bevel gear, one end of the first transmission shaft is fixedly provided with a second bevel gear meshed with the first bevel gear, the other end of the first transmission shaft is fixedly provided with a third bevel gear, the upper end of the second transmission shaft is fixedly provided with a fourth bevel gear meshed with the third bevel gear, the lower end of the second transmission shaft is fixedly provided with a fifth bevel gear, the third transmission shaft is fixedly provided with a sixth bevel gear meshed with the fifth bevel gear and a second belt wheel coaxially arranged with the sixth bevel gear, and a transmission belt is arranged between the second belt wheel and the first belt wheel.
Further, the valve body is provided with a first mounting groove at an upper end opening of the valve cavity, the valve cover is fixedly mounted at the upper end of the first mounting groove, and a sealing ring sleeved on the knife switch is fixedly arranged below the valve cover in the first mounting groove.
Advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) sediment (slurry) in the bottom cavity in the valve seat is pushed out by using the push plate, so that the problem that the sediment can prop against the knife switch and cannot be closed is solved;
(2) the push plate is driven to rotate by the transmission assembly, so that the push plate always works while the flashboard moves downwards, the continuous discharge of silt is ensured, and the sediment (slurry) in the bottom cavity in the valve seat can be pushed out from the sewage discharge port when the flashboard is closed every time, so that the closing of the knife gate valve is more reliable;
(3) by using the structure of the ratchet groove, the pawl and the spring piece, the push plate only works when the flashboard descends, so that the unidirectional pushing of the push plate can be controlled;
(4) the invention adopts the mode that the driving ring drives the push plate to rotate, and has simple structure and low manufacturing cost.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a sectional view taken along the line A-A of the present invention;
FIG. 3 is a right side view of the base of the present invention;
FIG. 4 is a sectional view taken along the line B-B when the blade of the present invention is raised;
FIG. 5 is a sectional view taken along line B-B when the blade of the present invention is lowered;
figures 6-8 are views of the push plate of the present invention in operation.
Detailed Description
Referring to fig. 1-8, a knife gate valve includes a valve body 5 and a valve seat 51 disposed at the bottom of the valve body 5, wherein a valve cavity 52 with openings at the upper and lower ends is disposed in the valve body 5, a left valve port 53 communicating with the valve cavity 52 is disposed at the left side of the valve body 5, and a right valve port 54 communicating with the valve cavity 52 is disposed at the right side of the valve body 5; the left valve port 53 and the right valve port 54 are coaxially arranged; a valve cover 55 is fixedly installed at an opening at the upper end of the valve cavity 52, and a knife switch 4 for controlling the on-off of the left valve port 53 and the right valve port 54 is connected in the valve cover 55 in a sliding manner; the upper end of the valve body 5 is provided with a driving component for driving the knife switch 4 to move up and down; a bottom cavity 56 communicated with the valve cavity 52 is arranged in the valve seat 51; the side of disk seat is equipped with the drain 5b with the bottom chamber 56 intercommunication, be equipped with the clearance subassembly in the bottom chamber 56, the clearance subassembly is used for discharging the precipitate in the bottom chamber 56 by drain 5b, be equipped with drive assembly between drive assembly and the clearance subassembly, drive assembly is used for when the plug-in strip 4 downstream, and the drive assembly work of clearance is cleared up in the drive. A left sealing ring 6a is fixedly arranged at the left valve port 53, and a right sealing ring is fixedly arranged at the right valve port 54; when the gate valve is completely opened, the knife switch 4 leaves between the left sealing ring 6a and the right sealing ring 6b, and the left sealing ring 6a and the right sealing ring 6b are tightly attached to each other; when the gate valve is closed, the knife switch 4 is inserted between the left sealing ring 6a and the right sealing ring 6b, the left sealing ring 6a is deformed and attached to the left side of the knife switch 4, and the right sealing ring 6b is deformed and attached to the right side of the knife switch 4.
The driving assembly comprises an internal thread sleeve 21, the upper end of the valve body 5 is provided with a door-shaped frame 22, the internal thread sleeve 21 is rotatably connected to the upper end of the door-shaped frame 22, the internal thread of the internal thread sleeve 21 is connected with a screw rod 1, and the lower end of the screw rod 1 is fixedly connected with the upper end of the knife switch 4; the outer side of the internal thread sleeve 21 is fixedly provided with a hand wheel 2 for driving the internal thread sleeve 21 to rotate, and when the internal thread sleeve 21 is rotated, the screw rod 1 drives the switch blade 4 to move up and down.
The cleaning assembly comprises a first rotating shaft 81 which is rotatably connected in the valve seat 51, one end of the first rotating shaft 81 is positioned in the bottom cavity 56 and is provided with a rotating disc 8, the outer side of the circumference of the rotating disc 8 is provided with a transmission ring 82 along the axial extension of the first rotating shaft 81, and a power port 83 is arranged in the transmission ring 82; the other end of the first rotating shaft 81 extends out of the valve seat 51 and is provided with a first belt pulley 9; a second rotating shaft 71 is rotatably connected to the side wall of the valve seat 51 opposite to the first rotating shaft 81, the second rotating shaft 71 is positioned above the first rotating shaft 81, and a push plate 7 positioned in the power port 83 is arranged at one end of the second rotating shaft 71 extending into the bottom cavity 56; an annular cutting groove 91 is formed in the outer side of one end of the first rotating shaft 81 on the end face of the first belt pulley 9, a connecting block 18 positioned in the annular cutting groove 91 is fixedly installed at one end of the first rotating shaft 81, a ratchet groove 92 is formed in the inner side wall of the annular cutting groove 91 along the axial direction, a notch 181 is formed in the outer side of the circumference of the connecting block 18, a pawl 19 and a spring piece 20 used for forcing the pawl 19 to extend into the ratchet groove 92 are arranged in the notch 181; when the knife switch 4 moves downwards, the first belt wheel 9 drives the first rotating shaft 81 to rotate; when the knife switch 4 moves upwards, the first belt pulley 9 idles; when the first rotating shaft 81 drives the power port 83 on the transmission ring 82 to rotate to the highest position, the push plate 7 extends out of the power port 83 for the longest time; when the first rotating shaft 81 drives the power port 83 on the transmission ring 82 to rotate to the lowest position, the push plate 7 retracts into the power port 83.
The transmission assembly comprises a first transmission shaft 161, a second transmission shaft 13 and a third transmission shaft 121; an upper support rod 114 is arranged at the upper end of the door-shaped frame 22, and a lower support rod 115 is arranged on the side surface of the valve seat 51; the first transmission shaft 161 is rotatably connected to the upper support rod 114 and is perpendicular to the screw rod 1; the second transmission shaft 13 is rotatably connected in the valve body 5 and is parallel to the screw rod 1; the third transmission shaft 121 is rotatably connected to the lower support bar 115 and is perpendicular to the first transmission shaft 161 and the second transmission shaft 13; the hand wheel 2 is fixedly provided with a first bevel gear 3, one end of the first transmission shaft 161 is fixedly provided with a second bevel gear 16 meshed with the first bevel gear 3, the other end of the first transmission shaft is fixedly provided with a third bevel gear 15, the upper end of the second transmission shaft 13 is fixedly provided with a fourth bevel gear 14 meshed with the third bevel gear 15, the lower end of the second transmission shaft is fixedly provided with a fifth bevel gear 11, the third transmission shaft 121 is fixedly provided with a sixth bevel gear 12 meshed with the fifth bevel gear 11 and a second belt wheel 17 coaxially arranged with the sixth bevel gear 12, and a transmission belt 10 is arranged between the second belt wheel 17 and the first belt wheel 9.
The valve body 5 is provided with a first mounting groove 57 at an opening at the upper end of the valve cavity 52, the valve cover 55 is fixedly mounted at the upper end of the first mounting groove 57, and a sealing ring 58 sleeved on the knife switch 4 is fixedly arranged in the first mounting groove 57 below the valve cover 55.
When a knife gate valve is used for cutting off a pipeline, firstly, a hand wheel 2 is rotated, the hand wheel 2 drives an internal thread sleeve 21 to rotate, the screw rod 1 pushes a knife switch 4 to push downwards to open and close a left sealing ring 6a and a right sealing ring 6b which are combined together due to the threaded fit of the internal thread sleeve 21 and the screw rod 1, mud in the pipeline enters a bottom cavity 56 through a gap formed by the pushing away of the left sealing ring 6a and the right sealing ring 6b, the hand wheel 2 rotates and simultaneously drives a first bevel gear 3 to rotate, the first bevel gear 3, a second bevel gear 16, a first transmission shaft 161, a third bevel gear 15, a fourth bevel gear 14, a second transmission shaft 13, a fifth bevel gear 11, a sixth bevel gear 12, a third transmission shaft 121, a second belt pulley 17 and a transmission belt 10 drive a first belt pulley 9 to rotate, and a pawl 19 is abutted against a ratchet groove 92 under the action of a spring leaf 20, so that the first pulley 9 drives the first rotation shaft 81 to rotate anticlockwise, the first rotating shaft 81 drives the transmission ring 82 to rotate through the rotating disc 8, so as to drive the push plate 7 to rotate around the second rotating shaft 71, because the push plate 7 and the transmission ring 82 are eccentrically arranged, when the push plate 7 rotates to the upper half part of the transmission ring 82, the push plate extends out of the transmission ring 82 (as shown in figures 6, 7 and 8), so as to push sediment (slurry) in the bottom cavity 56 to move leftwards and push the sediment to the sewage discharge outlet 5b, so that no slurry is left in the bottom cavity 56, the knife gate 4 can smoothly enter the bottom cavity 56 to close the valve port, when a pipeline is to be opened by using a knife gate valve, the hand wheel 2 is reversely rotated, the first bevel gear 3, the second bevel gear 16, the first transmission shaft 161, the third bevel gear 15, the fourth bevel gear 14, the second transmission shaft 13, the fifth bevel gear 11, the sixth bevel gear 12, the third transmission shaft 121, the second belt pulley 17 and the transmission belt 10 drive the first belt pulley 9 to rotate clockwise, and the ratchet groove 92 inside the first belt 9 pushes the pawl 19 to overcome the rotation of the spring plate 20, the pawl 19 is withdrawn from the ratchet groove 92 inside the first pulley 9, and the first rotating shaft 81 does not rotate along with the first pulley 9 until the knife blade 4 is lifted to the maximum, and the knife gate valve is completely opened, thereby completing the work.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A knife gate valve comprises a valve body and a valve seat arranged at the bottom of the valve body, and is characterized in that a valve cavity with openings at the upper end and the lower end is arranged in the valve body, a left valve port communicated with the valve cavity is arranged at the left side of the valve body, and a right valve port communicated with the valve cavity is arranged at the right side of the valve body; the left valve port and the right valve port are coaxially arranged; a valve cover is fixedly arranged at an opening at the upper end of the valve cavity, and a knife switch for controlling the on-off of the left valve port and the right valve port is connected in the valve cover in a sliding manner; the upper end of the valve body is provided with a driving component for driving the knife switch to move up and down; a bottom cavity communicated with the valve cavity is arranged in the valve seat; a drain outlet communicated with the bottom cavity is formed in the side face of the valve seat, a cleaning assembly is arranged in the bottom cavity and used for discharging sediment in the bottom cavity from the drain outlet, a transmission assembly is arranged between the driving assembly and the cleaning assembly and used for driving the cleaning assembly to work when the switch knife moves downwards;
the driving assembly comprises an internal thread sleeve, the upper end of the valve body is provided with a door-shaped frame, the internal thread sleeve is rotatably connected to the upper end of the door-shaped frame, a lead screw is connected in the internal thread sleeve in a threaded manner, and the lower end of the lead screw is fixedly connected with the upper end of the knife switch; a hand wheel for driving the internal thread sleeve to rotate is fixedly arranged on the outer side of the internal thread sleeve, and when the internal thread sleeve is rotated, the lead screw drives the knife switch to move up and down;
the cleaning assembly comprises a first rotating shaft which is rotatably connected in the valve seat, one end of the first rotating shaft is positioned in the bottom cavity and is provided with a rotating disc, the outer side of the circumference of the rotating disc is provided with a transmission ring along the axial extension of the first rotating shaft, and a power port is arranged in the transmission ring; the other end of the first rotating shaft extends out of the valve seat and is provided with a first belt pulley; a second rotating shaft is rotatably connected to the side wall of the valve seat opposite to the first rotating shaft and is positioned above the first rotating shaft, and a push plate positioned in the power port is arranged at one end, extending into the bottom cavity, of the second rotating shaft; an annular cutting groove is formed in the outer side of one end of the first rotating shaft on the end face of the first belt wheel, a connecting block located in the annular cutting groove is fixedly installed at one end of the first rotating shaft, a ratchet groove is formed in the inner side wall of the annular cutting groove in the axial direction, a notch is formed in the outer side of the circumference of the connecting block, a pawl is arranged in the notch, and a spring piece used for forcing the pawl to extend into the ratchet groove is arranged in the notch; when the knife switch moves downwards, the first belt pulley drives the first rotating shaft to rotate; when the knife switch moves upwards, the first belt wheel idles; when the first rotating shaft drives the power port on the transmission ring to rotate to the highest position, the push plate extends out of the power port for the longest time; when the first rotating shaft drives the power port on the transmission ring to rotate to the lowest position, the push plate retracts into the power port;
the transmission assembly comprises a first transmission shaft, a second transmission shaft and a third transmission shaft; an upper supporting rod is arranged at the upper end of the door-shaped frame, and a lower supporting rod is arranged on the side surface of the valve seat; the first transmission shaft is rotatably connected to the upper support rod and is perpendicular to the screw rod; the second transmission shaft is rotatably connected in the valve body and is parallel to the screw rod; the third transmission shaft is rotatably connected to the lower support rod and is perpendicular to the first transmission shaft and the second transmission shaft; fixed mounting has first bevel gear on the hand wheel, the one end fixed mounting of first transmission shaft has second bevel gear with first bevel gear meshing, other end fixed mounting has third bevel gear, the upper end fixed mounting of second transmission shaft has fourth bevel gear with third bevel gear meshing, lower extreme fixed mounting has fifth bevel gear, fixed mounting has sixth bevel gear with fifth bevel gear meshing on the third transmission shaft to and with the coaxial setting of sixth bevel gear and rotate the second band pulley of connection on the third transmission shaft, be equipped with the drive belt between second band pulley and the first band pulley.
2. The knife gate valve of claim 1, wherein a left sealing ring is fixedly installed at the left valve port, and a right sealing ring is fixedly installed at the right valve port; when the gate valve is completely opened, the knife switch leaves between the left sealing ring and the right sealing ring, and the left sealing ring and the right sealing ring are tightly attached to each other; when the gate valve is closed, the knife switch is inserted between the left sealing ring and the right sealing ring, the left sealing ring is deformed and tightly attached to the left side of the knife switch, and the right sealing ring is deformed and tightly attached to the right side of the knife switch.
3. The knife gate valve according to claim 1, wherein the valve body is provided with a first mounting groove at an upper opening of the valve chamber, the valve cover is fixedly mounted at an upper end of the first mounting groove, and a sealing ring sleeved on the knife gate is fixedly arranged below the valve cover in the first mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010874014.1A CN111998087B (en) | 2020-08-26 | 2020-08-26 | Knife-shaped gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010874014.1A CN111998087B (en) | 2020-08-26 | 2020-08-26 | Knife-shaped gate valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111998087A CN111998087A (en) | 2020-11-27 |
| CN111998087B true CN111998087B (en) | 2022-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010874014.1A Active CN111998087B (en) | 2020-08-26 | 2020-08-26 | Knife-shaped gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111998087B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19718662A1 (en) * | 1996-06-15 | 1998-01-02 | Weco Armaturen Gmbh | Slide component for installation in pipe conduits |
| CN101526143A (en) * | 2009-03-05 | 2009-09-09 | 上海宾特阀门有限公司 | Pneumatic knife-shape gate valve of blowing and sweeping type |
| CN203585389U (en) * | 2013-09-09 | 2014-05-07 | 齐建慧 | Abrasion-proof knife-shaped gate valve |
| CN210318590U (en) * | 2019-08-13 | 2020-04-14 | 北京中瑞麦通科技有限公司 | Bidirectional knife gate valve |
| CN212297674U (en) * | 2020-06-04 | 2021-01-05 | 费斯托阀门科技浙江有限公司 | Knife gate valve |
-
2020
- 2020-08-26 CN CN202010874014.1A patent/CN111998087B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19718662A1 (en) * | 1996-06-15 | 1998-01-02 | Weco Armaturen Gmbh | Slide component for installation in pipe conduits |
| CN101526143A (en) * | 2009-03-05 | 2009-09-09 | 上海宾特阀门有限公司 | Pneumatic knife-shape gate valve of blowing and sweeping type |
| CN203585389U (en) * | 2013-09-09 | 2014-05-07 | 齐建慧 | Abrasion-proof knife-shaped gate valve |
| CN210318590U (en) * | 2019-08-13 | 2020-04-14 | 北京中瑞麦通科技有限公司 | Bidirectional knife gate valve |
| CN212297674U (en) * | 2020-06-04 | 2021-01-05 | 费斯托阀门科技浙江有限公司 | Knife gate valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111998087A (en) | 2020-11-27 |
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Address after: 325100 Zhoushan Road, Dongou Industrial Zone, Oubei City New Area, Yongjia County, Wenzhou City, Zhejiang Province Applicant after: LIXIN VALVE GROUP CO.,LTD. Address before: 325102 Zhoushan Road, Dongou Industrial Zone, Oubei urban new area, Jia County, Wenzhou City, Zhejiang Province Applicant before: LIXIN VALVE GROUP CO.,LTD. |
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Denomination of invention: A knife shaped gate valve Effective date of registration: 20230620 Granted publication date: 20220325 Pledgee: Agricultural Bank of China Limited Yongjia County sub branch Pledgor: LIXIN VALVE GROUP CO.,LTD. Registration number: Y2023330001238 |