CN112283357B - Unloading bottom valve - Google Patents

Unloading bottom valve Download PDF

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Publication number
CN112283357B
CN112283357B CN202011349259.9A CN202011349259A CN112283357B CN 112283357 B CN112283357 B CN 112283357B CN 202011349259 A CN202011349259 A CN 202011349259A CN 112283357 B CN112283357 B CN 112283357B
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China
Prior art keywords
valve
rod
transmission block
driving gear
clack
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CN202011349259.9A
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Chinese (zh)
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CN112283357A (en
Inventor
张莹磊
陈照波
潘纪忠
于衍宏
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Taizhou Baiguan Pump And Valve Technology Co ltd
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Taizhou Baiguan Pump And Valve Technology Co ltd
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Publication of CN112283357A publication Critical patent/CN112283357A/en
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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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • F16K31/53—Mechanical actuating means with toothed gearing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

The invention belongs to the technical field of a discharge bottom valve. A kind of bottom valve of unloading, including the valve block, the inlet of front end of the valve block installs the bottom valve, the said bottom valve includes the pressing plate installed on front end inlet end face, valve clack cooperating with cavity of the valve block, valve stem to open valve clack, the cover of valve clack has elastic members, the elastic member is squeezed between valve clack and pressing plate; the valve rod driving device is characterized by comprising a box body, and a driving gear and a driven gear which are meshed with each other and are arranged in the box body, wherein the outer diameter of the driven gear is larger than that of the driving gear; the driving gear is provided with a driving gear driving device. The invention is used for solving the technical problem that the existing discharging bottom valve cannot be opened slowly.

Description

Unloading bottom valve
Technical Field
The invention belongs to the technical field of discharge bottom valves, and particularly relates to a slow-opening and fast-closing discharge bottom valve.
Background
The Chinese patent with publication number CN205534256U and publication date 2016, 8 and 31 discloses a combined discharging bottom valve, which comprises a valve casing, wherein the front end inlet of the valve casing is inclined upwards, the end face of the front end inlet is a flange face, a bottom valve is arranged in the front end inlet, the rear section of the valve casing is provided with a butterfly valve, the rear end of the valve casing is a discharging connector, the connector is provided with a dustproof cover, the bottom valve comprises a pressing plate arranged on the front end inlet end face, a valve plate matched with the inner cavity of the valve casing, a crank mechanism for opening the valve plate and a valve rod, the valve rod is vertically arranged on the upper top face of the valve plate, the pressing plate is provided with a guide hole matched with the valve rod, the valve rod is sleeved with an elastic piece, and the elastic piece is extruded between the valve plate and the pressing plate; the crank mechanism is arranged below the valve plate. Crank mechanism includes pivot, crank and ejector pin, pivot one end is connected through the shaft hole in axle sleeve and the valve casing, and the pivot other end is connected through the shaft hole cooperation on seal assembly and the valve casing, installs the spanner on the extension end of pivot, and crank fixed mounting has the ejector pin in the pivot, and articulate has the bottom surface cooperation of free end and valve plate of ejector pin. The unloading bottom valve with the structure can realize quick opening and quick closing, but cannot be opened slowly and closed quickly.
Disclosure of Invention
The invention aims to provide a discharging bottom valve to solve the technical problem that the existing discharging bottom valve cannot be opened slowly and closed quickly.
The invention aims to realize the following technical scheme that the unloading bottom valve comprises a valve body, wherein a bottom valve is installed at an inlet at the front end of the valve body, the bottom valve comprises a pressing plate installed on the end surface of the inlet at the front end, a valve clack matched with an inner cavity of the valve body and a valve rod for opening and closing the valve clack, the valve rod is rotatably arranged in the valve plate, a crank is arranged on the valve rod and is hinged with a mandril, a guide rod is arranged on the upper top surface of the valve clack, a guide hole matched with the guide rod is formed in the pressing plate, an elastic piece is sleeved on the guide rod, and the elastic piece is extruded between the valve clack and the pressing plate; the valve rod driving device is characterized by comprising a box body, a driving gear, a driven gear and a driving gear driving device, wherein the driving gear, the driven gear and the driving gear driving device are arranged in the box body and are meshed with each other;
the driving gear driving device comprises a handle and a first transmission block, wherein the front end of the handle is provided with two connecting arms, the front ends of the two connecting arms are rotatably arranged on a first pin shaft, a second pin shaft is arranged between the two connecting arms, a first torsion spring and a first transmission block are arranged on the second pin shaft, the end part of the first transmission block is provided with a first pawl, and the first pawl on the first transmission block is meshed with a driving gear under the action of the first torsion spring;
a third pin shaft is arranged on the box body, a second transmission block and a second torsion spring are arranged on the third pin shaft, the second transmission block is positioned below the first transmission block, a second pawl is arranged on the second transmission block, and the second pawl on the second transmission block is meshed with the driving gear under the action of the second torsion spring;
the handle is rotated upwards to drive the transmission block, the first pawl and the driving gear to rotate clockwise around the first pin shaft, the driven gear rotates anticlockwise to drive the valve rod to rotate anticlockwise, the valve rod drives the crank and the ejector rod to rotate anticlockwise to push the valve clack pressing plate to move in the direction, so that the valve clack of the bottom valve is opened, and the elastic piece on the guide rod is compressed;
the handle is rotated downwards to drive the first transmission block to rotate anticlockwise, the first transmission block presses down the second transmission block, the second transmission block rotates anticlockwise, the second pawl on the second transmission block is far away from the driving gear, the first pawl is driven to be far away from the driving gear, the driving gear and the driven gear can rotate freely, the compressed elastic piece rebounds to drive the valve clack to move towards the valve rod direction, and the bottom valve is closed.
Compared with the prior art, the invention has the following beneficial effects:
slowly opening the discharging bottom valve: the handle is rotated upwards to drive the transmission block, the first pawl and the driving gear to rotate clockwise around the first pin shaft, the driven gear rotates anticlockwise to drive the valve rod to rotate anticlockwise, the valve rod drives the crank and the ejector rod to rotate anticlockwise to push the valve clack pressing plate to move in the direction, so that the valve clack of the bottom valve is opened, and the elastic piece on the guide rod is compressed; the slow opening of the bottom valve is realized by only rotating one tooth at a time.
Quick closing of the discharging bottom valve: the handle is rotated downwards to drive the first transmission block to rotate anticlockwise, the first transmission block presses down the second transmission block, the second transmission block rotates anticlockwise, the second pawl on the second transmission block is far away from the driven gear, the first pawl is driven to be far away from the driving gear, the driving gear and the driven gear can rotate freely, the compressed elastic piece rebounds to drive the valve clack to move towards the valve rod direction, and the bottom valve is closed quickly. Under the action of the elastic part, the bottom valve is quickly closed.
The valve rod on the valve body is fixedly connected with the driven gear, the handle is rotated clockwise to realize the opening of the bottom valve, the driving gear rotates one tooth each time until the driving gear rotates to the upper limit of the movement of the handle, at the moment, the handle is rotated anticlockwise to enable the first transmission block and the second transmission block to be separated from the driving gear and the driven gear, the valve rod is disconnected with the valve rod driving device, and the driven gear rotates clockwise to drive the driving gear to rotate anticlockwise to close the bottom valve under the action of the elastic piece.
The discharging bottom valve is additionally provided with the valve rod driving device, namely the quick-closing slow-opening device, so that leakage can be effectively prevented, external force impact can be avoided, and the opening and closing time of the valve can be prolonged.
The quick-closing type safety valve can effectively prevent leakage, avoids safety accidents and plays a safety role; the slow opening can avoid external force impact, thereby prolonging the opening and closing time of the valve. The valve body is guaranteed to play a good protection role when opened and closed under standard pressure.
In order to solve the technical problem that the bottom valve is kept in an open state after being opened, the invention is further improved, a driven gear braking device is arranged on the driven gear and comprises a pull rod and a backstop block fixedly connected to the pull rod, a rack is arranged on the surface of the backstop block, and the rack is matched with a driving gear; the elastic part is sleeved on the pull rod and extruded between the stopping block and the box body, the pull rod extends out of the box body and is arranged on the positioning ring through the pull ring, the positioning ring is provided with a first axial limiting groove and a second axial limiting groove, and the first axial limiting groove and the second axial limiting groove are used for positioning the first pull rod in a pulling-out and retracting manner.
When the bottom valve needs to be opened, the pull rod is pulled out through the pull ring, the pull ring is placed in the first axial groove, and at the moment, the driven gear can rotate; after the bottom valve is opened, the pull ring is pulled out of the first axial groove and rotates to fall into the second axial groove, the stop block is matched with the driven gear, and the driven gear is prevented from rotating.
The valve is further improved, one end of the valve rod is connected with a shaft hole in the valve body through a shaft sleeve, the other end of the valve rod is connected with the shaft hole in the valve body in a matched mode through a sealing assembly, a crank mechanism driving device is installed at the extending end of the valve rod, a crank is fixedly installed on the valve rod, the head of the crank is hinged with an ejector rod, and the free end of the ejector rod is matched with the bottom face of the valve plate.
The invention is further improved, a conical cavity is arranged on the bottom surface of the valve clack, and the free end of the ejector rod extends into the conical cavity.
In order to solve the technical problem of high cost of the discharge bottom valve, the invention is further improved, the valve body is made of carbon steel, the sealing surface of the valve body, which is sealed with the valve clack, is conical, and cobalt-based alloy is welded on the sealing surface of the valve body in a surfacing manner.
The existing discharging bottom valve is made of stainless steel and has high cost. The valve body material of the invention adopts carbon steel, thus reducing the cost of the valve body. The cobalt-base alloy is overlaid on the sealing surface of the flange at the outlet of the valve, and the overlaying of the cobalt-base alloy can improve the comprehensive performances of abrasion resistance, corrosion resistance, erosion resistance, high temperature resistance and the like of the sealing surface of the valve, thereby not only reducing the cost of the valve, but also prolonging the service life of the valve. And the cobalt-based alloy welding material has better properties of hot hardness, oxidation resistance, abrasion resistance, scratch resistance, corrosion resistance and the like.
The cobalt-based alloy welding rod is used in the situation that the cobalt-based alloy welding rod can still maintain good wear resistance and corrosion resistance when working at the temperature of about 650 ℃, or can bear impact and alternate cold and hot parts, has excellent comprehensive heat resistance, corrosion resistance and oxidation resistance, and can maintain higher hardness at the high temperature of more than 600 ℃.
The cobalt-based alloy electrode adopts direct current reverse polarity during surfacing, preheating and slow cooling are needed during surfacing in order to prevent the array, and after the cobalt-based alloy is subjected to surfacing, the cobalt-based alloy is put into operation in a general welding state.
In order to solve the sealing problem between the valve clack and the valve body, the invention is further improved, a sealing ring mounting groove is arranged on the outer circumferential surface of the valve clack, and a sealing ring is arranged in the sealing ring mounting groove.
In order to solve the sealing problem between the valve clack and the valve body, the invention is further improved, the end part of the valve clack is of a step structure, a sealing ring is arranged on the step structure, and the sealing ring is tightly pressed through a nut and a valve clack pressing plate.
The invention is further improved, the caliber of the valve body is 80mm and 150mm, and the application range is wide.
The invention is further improved, the first axial limiting groove and the second axial limiting groove integrally form a cross structure, and the depth of the first axial limiting groove is smaller than that of the second axial limiting groove.
The invention is further improved, and a first torsion spring mounting groove is processed at the end part of the transmission block connected with the second pin shaft.
The invention is further improved, and a second torsion spring mounting groove is processed at the end part of the transmission block connected with the third pin shaft.
The invention is further improved, the inlet at the front end of the valve body is inclined upwards, and the rear end of the valve body is provided with a discharging joint.
Drawings
FIG. 1 is a first perspective view of the discharge base valve of the present invention;
FIG. 2 is a cross-sectional view of the discharge foot valve of the present invention;
FIG. 3 is a schematic structural view of the crank mechanism of the dump base valve of the present invention;
FIG. 4 is a perspective view of the drive gear drive of the discharge base valve of the present invention;
FIG. 5 is a cross-sectional view of the drive gear drive of the discharge base valve of the present invention;
FIG. 6 is a schematic view of the construction of the tank of the discharge bottom valve of the present invention;
FIG. 7 is a schematic structural view of a valve body of the discharge bottom valve with a cobalt-based alloy sealing surface deposited thereon;
FIG. 8 is a view of the open state of the base valve of the present invention;
FIG. 9 is a close-up view of the base valve of the present invention.
Detailed Description
As shown in fig. 1-7, the discharging bottom valve comprises a valve body 1, wherein an inlet at the front end of the valve body is inclined upwards, and a bottom valve 2 is arranged at the inlet at the front end of the valve body. The rear end of the valve body is provided with a discharging joint. The valve body 1 is provided with a fluid passage, the inlet end of the fluid passage is provided with an inlet connecting flange, and the outlet end of the fluid passage is provided with an outlet connecting flange. When the discharge joint is not used, the discharge joint is closed through a gasket 82 and a blocking cover 81.
The bottom valve comprises a pressing plate 21 arranged on the front end inlet end face, a valve clack 22 matched with the inner cavity of the valve body and a valve rod 24 for opening the valve clack, wherein a guide rod 28 is arranged on the upper top face of the valve clack 22, a guide hole matched with the guide rod 28 is formed in the pressing plate 21, an elastic piece 25 is sleeved on the guide rod, and the elastic piece 25 is extruded between the valve clack 22 and the pressing plate.
The valve rod driving device 3 comprises a box body 30, a driving gear 31, a driven gear 32, a main cover plate 35 and a moving gear driving device 4 which are arranged in the box body 30 and are engaged with each other. The box 30 is directly connected with the valve body 1, the outer diameter of the driven gear 32 is larger than that of the driving gear 31, the driven gear 32 is fixedly connected with the valve rod 24, and the driving gear 31 is rotatably arranged on a first pin shaft 51 arranged on the box 30.
The driving gear driving device 4 comprises a handle 40 and a first transmission block 41, the front end of the handle is provided with two connecting arms 401, the front ends of the two connecting arms 401 are rotatably arranged on a first pin shaft 51, a second pin shaft 52 is arranged between the two connecting arms 401, a first torsion spring 43 and a first transmission block 41 are arranged on the second pin shaft, and the end part of the transmission block connected with the second pin shaft is provided with a first torsion spring installation groove 411. Both ends of the first torsion spring 43 are respectively in contact with the handle 40 and the first transmission block 41. The end of the transmission block is provided with a first pawl 43, and under the action of the first torsion spring 43, the first pawl on the first transmission block 41 locks the driving gear.
A third pin shaft 53 is arranged on the box body 30, a second transmission block 42 and a second torsion spring 44 are arranged on the third pin shaft 53, the second transmission block 42 is positioned below the first transmission block 41, and a second torsion spring installation groove 421 is processed at the end part of the second transmission block 42 connected with the third pin shaft. Two ends of the second torsion spring are respectively contacted with the box body platform and the locking block which are positioned below. The locking block is provided with a second pawl 44, the second pawl is matched with the driving gear, and the driving gear is locked by the second pawl on the locking block under the action of a second torsion spring.
The driven gear braking device 6 comprises a pull rod 61 and a backstop block 62 fixedly connected with the pull rod, wherein a rack is arranged on the surface of the backstop block and matched with the driven gear 32; the elastic part is sleeved on the pull rod 61 and extruded between the stopping block and the box body, the pull rod extends out of the box body and is arranged on the positioning ring 63 through the pull ring, the positioning ring is provided with a first axial limiting groove 631 and a second axial limiting groove 632, and the first axial limiting groove 631 and the second axial limiting groove 632 are used for positioning the pull rod 61 in a pulling-out and retracting manner.
Set up crank mechanism 23 on the valve rod 24, including crank 231 and ejector pin 232, the shaft hole in valve rod 24 one end warp axle sleeve and the valve body is connected, and the valve rod other end is connected through the shaft hole cooperation on sealing assembly and the valve body, and the end installation crank mechanism drive arrangement that stretches out of valve rod, crank fixed mounting are in the valve rod, and articulate has the ejector pin, and the free end of ejector pin cooperates with the bottom surface of valve plate.
The bottom surface of the valve flap 22 is provided with a conical cavity 221 into which the free end of the push rod extends.
The valve body 1 is made of carbon steel, the sealing surface of the valve body sealed with the valve clack is conical, and the cobalt-based alloy 10 is welded on the sealing surface of the valve body in a surfacing mode.
The existing discharging bottom valve is made of stainless steel and has high cost. The valve body material of the invention adopts carbon steel, thus reducing the cost of the valve body. The cobalt-based alloy layer is welded on the sealing surface of the flange at the outlet of the valve in a surfacing mode, and the welding of the cobalt-based alloy layer can improve the comprehensive performances of abrasion resistance, corrosion resistance, erosion resistance, high temperature resistance and the like of the sealing surface of the valve, so that the cost of the valve is reduced, and the service life of the valve is prolonged. And the cobalt-based alloy welding material has better performances of hot hardness, oxidation resistance, wear resistance, scratch resistance, corrosion resistance and the like.
The cobalt-based alloy welding rod is used in the situation that the cobalt-based alloy welding rod can still maintain good wear resistance and corrosion resistance when working at the temperature of about 650 ℃, or can bear impact and alternate cold and hot parts, has excellent comprehensive heat resistance, corrosion resistance and oxidation resistance, and can maintain higher hardness at the high temperature of more than 600 ℃.
The cobalt-based alloy electrode adopts direct current reverse polarity during surfacing, preheating and slow cooling are needed during surfacing in order to prevent the array, and after the cobalt-based alloy is subjected to surfacing, the cobalt-based alloy is put into operation in a general welding state.
And a sealing ring mounting groove is formed in the outer circumferential surface of the valve clack, and a sealing ring 71 is arranged in the sealing ring mounting groove.
The end part of the valve clack is of a step structure, a sealing ring 72 is arranged on the step structure, and the sealing ring 72 is tightly pressed through a nut 27 and a valve clack pressing plate 26. The valve clack department is equipped with round nut and clamp plate, plays the effect of fixed valve clack, and O type circle is added to valve clack department, plays sealed effect, more can effectually prevent to leak.
The caliber of the valve body can be 80mm or 150mm, the application range is wide, and the requirements of different use working conditions are met.
The first axial limiting groove and the second axial limiting groove integrally form a cross structure, and the depth of the first axial limiting groove is smaller than that of the second axial limiting groove.
As shown in fig. 8 and 9, the working process of the discharging bottom valve of the invention comprises the following steps:
(1) the handle is rotated upwards to drive the transmission block, the first pawl and the driving gear to rotate clockwise around the first pin shaft, the driven gear rotates anticlockwise to drive the valve rod to rotate anticlockwise, the valve rod drives the crank and the ejector rod to rotate anticlockwise to push the valve clack pressing plate to move in the direction, so that the valve clack of the bottom valve is opened, and the elastic piece on the guide rod is compressed;
when the bottom valve is opened to a certain opening degree, the pull rod is pulled out through the pull ring and placed in the second axial groove, and at the moment, the driven gear cannot rotate due to the locking of the retaining block, so that the opening degree of the bottom valve is maintained;
(2) when the bottom valve needs to be closed, the pull ring is pulled out of the second axial groove and rotates to fall into the first axial groove, and the pull ring contacts the locking state of the driven gear, so that the bottom valve can be closed. Rotating the handle downwards drives first transmission piece anticlockwise rotation, and first transmission piece pushes down the second transmission piece for second transmission piece anticlockwise rotation, driven gear is kept away from to the second pawl on the second transmission piece, drives first pawl and keeps away from the driving gear, but makes driving gear, driven gear free rotation, and the elastic component of compression kick-backs, drives the valve clack and moves to valve rod direction, closes the bottom valve.
The valve rod driving device drives the valve rod when rotating, and the valve rod drives the crank and the ejector rod when rotating, so that the valve clack is driven to move up and down, and the valve is opened and closed. The quick-closing slow-opening discharging bottom valve can effectively prevent leakage and play a safety role; the slow opening can avoid external force impact, thereby prolonging the opening and closing time of the valve. The invention mainly ensures that the valve body can play a good protection role when opened and closed under standard pressure.

Claims (10)

1. A discharging bottom valve comprises a valve body, wherein a bottom valve is installed at an inlet at the front end of the valve body, the bottom valve comprises a pressing plate installed on the end face of the inlet at the front end, a valve clack matched with an inner cavity of the valve body and a valve rod for opening and closing the valve clack, the valve rod is rotatably arranged in the valve plate, a crank is arranged on the valve rod, an ejector rod is hinged to the crank, a guide rod is arranged on the upper top face of the valve clack, a guide hole matched with the guide rod is formed in the pressing plate, an elastic piece is sleeved on the guide rod, and the elastic piece is extruded between the valve clack and the pressing plate; the valve rod driving device is characterized by comprising a box body, a driving gear, a driven gear and a driving gear driving device, wherein the driving gear, the driven gear and the driving gear driving device are arranged in the box body and are meshed with each other;
the driving gear driving device comprises a handle and a first transmission block, wherein the front end of the handle is provided with two connecting arms, the front ends of the two connecting arms are rotatably arranged on a first pin shaft, a second pin shaft is arranged between the two connecting arms, a first torsion spring and a first transmission block are arranged on the second pin shaft, the end part of the first transmission block is provided with a first pawl, and the first pawl on the first transmission block is meshed with a driving gear under the action of the first torsion spring;
a third pin shaft is arranged on the box body, a second transmission block and a second torsion spring are arranged on the third pin shaft, the second transmission block is positioned below the first transmission block, a second pawl is arranged on the second transmission block, and the second pawl on the second transmission block is meshed with the driving gear under the action of the second torsion spring;
the handle is rotated upwards to drive the transmission block, the first pawl and the driving gear to rotate clockwise around the first pin shaft, the driven gear rotates anticlockwise to drive the valve rod to rotate anticlockwise, the valve rod drives the crank and the ejector rod to rotate anticlockwise to push the valve clack pressing plate to move in the direction, so that the valve clack of the bottom valve is opened, and the elastic piece on the guide rod is compressed;
the handle is rotated downwards to drive the first transmission block to rotate anticlockwise, the first transmission block presses down the second transmission block, the second transmission block rotates anticlockwise, the second pawl on the second transmission block is far away from the driving gear, the first pawl is driven to be far away from the driving gear, the driving gear and the driven gear can rotate freely, the compressed elastic piece rebounds to drive the valve clack to move towards the valve rod direction, and the bottom valve is closed.
2. The discharge bottom valve according to claim 1, wherein the driven gear is provided with a driven gear braking device which comprises a pull rod and a retaining block fixedly connected to the pull rod, and the surface of the retaining block is provided with a rack which is matched with a driving gear; the elastic part is sleeved on the pull rod and extruded between the stopping block and the box body, the pull rod extends out of the box body and is arranged on the positioning ring through the pull ring, the positioning ring is provided with a first axial limiting groove and a second axial limiting groove, and the first axial limiting groove and the second axial limiting groove are used for positioning the first pull rod in a pulling-out and retracting manner.
3. The discharging bottom valve according to claim 1, wherein one end of the valve rod is connected with the shaft hole in the valve body through a shaft sleeve, the other end of the valve rod is connected with the shaft hole in the valve body in a matching manner through a sealing assembly, the extending end of the valve rod is provided with a valve rod driving device, the crank is fixedly arranged on the valve rod, the head of the crank is hinged with an ejector rod, and the free end of the ejector rod is matched with the bottom surface of the valve clack.
4. The bottom valve of claim 3, wherein the bottom surface of the valve flap has a tapered cavity, and the free end of the stem extends into the tapered cavity.
5. The discharge bottom valve according to claim 1, wherein the valve body is made of carbon steel, a valve body sealing surface for sealing with the valve flap is tapered, and a cobalt-based alloy is welded on the valve body sealing surface.
6. The bottom valve of claim 5, wherein the valve flap has a gasket-receiving groove formed in an outer circumferential surface thereof, and a gasket is disposed in the gasket-receiving groove.
7. The bottom valve of claim 1, wherein the valve flap end is a step structure, a sealing ring is arranged on the step structure, and the sealing ring is pressed by a nut and a valve flap pressing plate.
8. The discharge foot valve according to claim 1, wherein the valve body has a bore of 80mm, 150 mm.
9. The discharge bottom valve according to claim 2, wherein the first axial limiting groove and the second axial limiting groove are integrally formed into a cross-shaped structure, and the depth of the first axial limiting groove is smaller than that of the second axial limiting groove.
10. The discharge base valve as recited in claim 1, wherein a first torsion spring mounting groove is formed at an end of the first transmission block connected to the second pin shaft; and a second torsional spring mounting groove is processed at the end part of a second transmission block connected with the third pin shaft.
CN202011349259.9A 2020-11-26 2020-11-26 Unloading bottom valve Active CN112283357B (en)

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Application Number Priority Date Filing Date Title
CN202011349259.9A CN112283357B (en) 2020-11-26 2020-11-26 Unloading bottom valve

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Application Number Priority Date Filing Date Title
CN202011349259.9A CN112283357B (en) 2020-11-26 2020-11-26 Unloading bottom valve

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CN112283357A CN112283357A (en) 2021-01-29
CN112283357B true CN112283357B (en) 2022-09-30

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CN105605230B (en) * 2016-02-19 2018-11-27 河南省好得利流体控制有限公司 A kind of axial-flow type discharge valve
CN205534256U (en) * 2016-03-28 2016-08-31 泰州市百冠泵阀科技有限公司 Combination discharge valve
CN206299880U (en) * 2016-12-13 2017-07-04 河北光德流体控制有限公司 A kind of novel turnover lifts bottom valve
CN109654232B (en) * 2018-12-24 2024-01-12 江苏联峰工业装备科技有限公司 Double-deck ash valve transmission

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Denomination of invention: A discharge bottom valve

Effective date of registration: 20231229

Granted publication date: 20220930

Pledgee: Bank of Jiangsu Co.,Ltd. Taixing sub branch

Pledgor: Taizhou Baiguan Pump AND Valve Technology Co.,Ltd.

Registration number: Y2023980075579