CN116658655A - Negative pressure exhaust valve for grain storage equipment and exhaust process - Google Patents
Negative pressure exhaust valve for grain storage equipment and exhaust process Download PDFInfo
- Publication number
- CN116658655A CN116658655A CN202310932299.3A CN202310932299A CN116658655A CN 116658655 A CN116658655 A CN 116658655A CN 202310932299 A CN202310932299 A CN 202310932299A CN 116658655 A CN116658655 A CN 116658655A
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- Prior art keywords
- sealing
- workpiece
- pipe
- wall
- negative pressure
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Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 270
- 238000004891 communication Methods 0.000 claims abstract description 55
- 239000000428 dust Substances 0.000 claims abstract description 49
- 238000001914 filtration Methods 0.000 claims abstract description 21
- 239000007789 gas Substances 0.000 claims description 15
- 239000010687 lubricating oil Substances 0.000 claims description 9
- 210000000056 organ Anatomy 0.000 claims description 9
- 239000011261 inert gas Substances 0.000 claims description 8
- 239000003921 oil Substances 0.000 claims description 8
- 239000013013 elastic material Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
-
- 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
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/08—Joints with sleeve or socket with additional locking means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/51—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for storing agricultural or horticultural products
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Air Transport Of Granular Materials (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to the technical field of negative pressure exhaust, in particular to a negative pressure exhaust valve for grain storage equipment and an exhaust process. The invention relates to a negative pressure exhaust valve for grain storage equipment, wherein a supporting tube is vertically fixed on a workbench; the communication head is fixed at the upper end of the support tube; the accommodating pipe is vertically fixed on the side wall of the communication head, the sealing part is slidably arranged at the position, close to the communication head, of the accommodating pipe, and the sealing part is suitable for sealing a workpiece; the filter assembly is rotatably arranged in the communication head, is suitable for opening or closing the supporting tube, and is linked with the sealing part; after the end part of the workpiece is inserted into the accommodating pipe, the sealing part is horizontally slid to enable the inner wall of the sealing part to tightly wrap the workpiece in a circumferential direction; air in the workpiece is filtered by the filtering component and then is vacuumized by the supporting tube; the reverse sliding sealing part can drive the filter assembly to circumferentially rotate and extrude the filter assembly to enable the filter assembly to filter and intercept dust and discharge the communication head.
Description
Technical Field
The invention relates to the technical field of negative pressure exhaust, in particular to a negative pressure exhaust valve for grain storage equipment and an exhaust process.
Background
The valve is a pipeline accessory for opening and closing a pipeline, controlling the flow direction, adjusting and controlling parameters (temperature, pressure and flow rate) of a conveying medium. Depending on their function, they can be classified into shutoff valves, check valves, regulating valves, etc.
The valve is a control component in the fluid conveying system and has the functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, diverting or overflow pressure relief and the like.
The existing negative pressure exhaust valve sealing sleeve can only be matched with an exhaust valve with one size, when exhaust valves with different outer diameters are required to be produced, different sealing sleeves are required to be replaced, and operators are required to waste time and labor to replace the sealing sleeves; meanwhile, dust or dust is accumulated in the glass shell in the storage process of the exhaust valve, the dust can be sucked into the negative pressure exhaust valve in the vacuumizing process of the negative pressure exhaust valve, and the long-term accumulation of the dust can influence the service life of the negative pressure exhaust valve. Therefore, it is necessary to develop a negative pressure vent valve for grain storage equipment.
Disclosure of Invention
The invention aims to provide a negative pressure exhaust valve for grain storage equipment and an exhaust process.
In order to solve the technical problems, the invention provides a negative pressure exhaust valve for grain storage equipment, which comprises:
the device comprises a workbench, a support tube, a communication head, a containing tube, a sealing part and a filtering assembly, wherein the support tube is vertically fixed on the workbench, and the interior of the support tube is hollow;
the communication head is fixed at the upper end of the support tube, the interior of the communication head is hollow, and the communication head is communicated with the support tube;
the accommodating pipe is vertically fixed on the side wall of the communication head, the inner diameter of the accommodating pipe is not smaller than the outer diameter of the workpiece, and the accommodating pipe is communicated with the communication head;
the sealing part is slidably arranged at the position, close to the communication head, of the accommodating pipe and is suitable for sealing a workpiece;
the filter assembly is rotatably arranged in the communication head, is suitable for opening or closing the supporting tube, and is linked with the sealing part; wherein the method comprises the steps of
After the end part of the workpiece is inserted into the accommodating pipe, horizontally sliding the sealing part to enable the inner wall of the sealing part to tightly hold and seal the workpiece in the circumferential direction;
air in the workpiece is vacuumized by the support tube after being filtered by the filtering component;
the sealing part slides reversely, the sealing part can drive the filter assembly to rotate circumferentially and extrude the filter assembly to enable the filter assembly to filter and intercept dust and discharge the communication head.
Preferably, a negative pressure air pump is fixed at the lower end of the workbench, and the supporting tube is communicated with the negative pressure air pump.
Preferably, the sealing part includes: the sealing cylinders are horizontally fixed on the outer wall of the communication head, and the end parts of piston rods of the sealing cylinders face the accommodating pipes;
the sealing sleeves are slidably arranged in the accommodating pipe, each sealing sleeve is arc-shaped, and a plurality of sealing sleeves are spliced into an oblong shape;
a pushing block corresponds to a sealing sleeve, the pushing block is vertically fixed on the outer wall of the sealing sleeve, and the pushing block protrudes out of the outer wall of the accommodating tube;
the accommodating pipe and the outer wall of the communication head are both provided with a sliding groove, a telescopic organ plate is arranged in the sliding groove, and the pushing block is slidably arranged in the sliding groove;
the side wall of the pushing block is provided with a vertical chute, and the end part of a piston rod of the sealing cylinder is slidably arranged in the vertical chute;
the sealing component is fixed on the inner wall of the sealing sleeve and is made of elastic materials; wherein the method comprises the steps of
When the pushing block is driven by the sealing cylinder to horizontally move towards the workpiece, the sealing sleeves are driven by the pushing block to horizontally move towards the workpiece and enable two adjacent sealing sleeves to oppositely move, so that the sealing assembly abuts against the outer wall of the workpiece and tightly seals the outer wall of the workpiece;
the sealing cylinder drives the pushing block to the direction of the filter assembly, the sealing sleeve horizontally slides along the outer wall of the filter assembly, so that the sealing assembly pushes the filter assembly to circumferentially rotate, and the filter assembly is extruded to enable the filter assembly to filter intercepted dust and discharge the communication head.
Preferably, the outer wall of the sealing sleeve is provided with a slope, and the inner wall of the accommodating tube is provided with an inclined plane matched with the slope; wherein the method comprises the steps of
When the pushing block drives the slope of the outer wall of the sealing sleeve to prop against the inclined surface, the sealing sleeve is continuously driven, so that the sealing sleeve can slide along the inclined surface towards the axial direction of the accommodating tube.
Preferably, the seal assembly includes: the sealing sleeve comprises a sealing ring, two contact blocks and two one-way valves, wherein a fixing groove is formed in the inner wall of each sealing sleeve, the sealing ring is arranged in the fixing groove in a telescopic manner, and the sealing ring protrudes out of the inner wall of the sealing sleeve;
the sealing ring is made of elastic materials, the inside of the sealing ring is hollow, and lubricating oil is suitable for being stored in the sealing ring;
the two contact blocks are respectively arranged at two sides of the sealing ring, and are respectively and slidably arranged on the inner wall of the sealing sleeve;
two sides of the sealing ring are respectively provided with an oil injection hole, each oil injection hole is internally provided with a one-way valve, one-way valve corresponds to one contact block, and the contact blocks are linked with the one-way valves; wherein the method comprises the steps of
After the sealing ring abuts against the outer wall of the workpiece, the sealing ring is suitable for tightly sealing the outer wall of the workpiece;
the workpiece extrudes the sealing ring to deform so that the sealing ring extrudes the two contact blocks to slide to two sides.
Preferably, a limit groove is formed in the inner wall of the sealing sleeve, and the limit groove is axially arranged along the sealing sleeve;
the contact block is fixedly provided with a fixed block matched with the limit groove, and the fixed block is suitable for sliding horizontally along the limit groove.
Preferably, the filter assembly includes: the rotary pipe is axially arranged along the accommodating pipe, and the rotary pipe is rotatably arranged in the communication head;
the inside of the rotating pipe is hollow, and one end of the rotating pipe, which faces the accommodating pipe, is open;
the external thread is spirally fixed at one end of the rotating pipe, which is close to the accommodating pipe;
a through hole is formed in the rotating tube, the filter screen is fixed in the through hole, and the filter screen is suitable for filtering and intercepting dust; wherein the method comprises the steps of
In an initial state, the filter screen faces the supporting tube, and when the negative pressure air pump sucks a workpiece, the filter screen can intercept dust;
the pushing block drives the sealing sleeve to move towards the direction of the rotating pipe, and the contact block abuts against the external thread and pushes the rotating pipe to rotate circumferentially so that the rotating pipe closes the supporting pipe;
the contact block extrudes the sealing ring to open the one-way valve, so that lubricating oil in the sealing ring is sprayed to the side wall of the external thread;
and continuously driving the sealing sleeve to horizontally move so that the sealing ring extrudes the filter screen to remove dust on the filter screen.
Preferably, a gas pipe is fixed on one side of the communicating head away from the accommodating pipe, the gas pipe is communicated with the accommodating pipe, and the gas pipe is suitable for conveying inert gas into the workpiece.
On the other hand, the invention also provides an exhaust process of the negative pressure exhaust valve for grain storage equipment, after the end part of a workpiece is inserted into the accommodating pipe, the sealing cylinder drives the pushing block to horizontally move towards the direction of the workpiece, the pushing block drives the sealing sleeve to synchronously horizontally slide towards the direction of the workpiece, and simultaneously the sealing sleeve slides towards the axis direction of the accommodating pipe under the guidance of an inclined plane, so that two adjacent sealing sleeves synchronously move towards each other; until the sealing ring abuts against the outer wall of the workpiece, the sealing ring can tightly seal the outer wall of the workpiece in a holding way; at the moment, the filter screen faces the supporting tube, when the negative pressure air pump pumps work, the negative pressure air pump can pump air and dust in a workpiece outwards, and the filter screen can intercept and filter the dust and prevent the dust from entering the negative pressure air pump; after the vacuumizing is finished, the negative pressure air pump stops working, and the air pipe conveys inert gas into the workpiece; sealing the workpiece port by using coal oxygen fire; the sealing cylinder drives the pushing block to move reversely so that the residual section of the workpiece can be taken out from the accommodating pipe; the sealing cylinder continuously drives the pushing block to move towards the gas transmission pipe so as to enable the sealing sleeve to axially slide along the outer wall of the rotating pipe, the contact block is propped against the side wall of the external thread and continuously moves towards the gas transmission pipe along with the sealing sleeve, and the contact block pushes the external thread so as to enable the rotating pipe to axially rotate, so that the through hole faces the side wall of the communicating head; synchronously, in the process that the contact block is propped against the external thread, the external thread extrudes the contact block to slide towards the sealing ring so that lubricating oil in the sealing ring can be sprayed to the side wall of the external thread; when the contact block is separated from the external thread, the filter screen circumferentially rotates 180 degrees so as to make the filter screen prop against a sealing ring; at this time, the vacuumizing of one workpiece is finished; before the next workpiece is inserted into the accommodating pipe, the sealing cylinder drives the pushing block to move towards the accommodating pipe, the sealing ring extrudes the filter screen to remove dust on the filter screen, so that the dust falls into the rotating cylinder, and at the moment, the air pipe blows air inwards to discharge the dust out of the accommodating pipe; simultaneously, the pushing block drives the filter screen to circumferentially rotate to be communicated with the supporting tube.
The negative pressure exhaust valve for the grain storage equipment has the beneficial effects that the negative pressure exhaust valve is matched with the filtering component through the sealing part, so that workpieces with different pipe diameters can be automatically adapted to achieve the effect of sealing the workpieces, and the sealing part can automatically seal the workpieces with different pipe diameters; meanwhile, the filter component can filter dust in the workpiece and prevent the dust from entering the negative pressure air pump; not only improves the universality of the sealing part, but also improves the working efficiency, simultaneously avoids dust from entering the negative pressure air pump, and improves the service life of the equipment.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a perspective view of a preferred embodiment of a negative pressure vent valve for a grain storage facility of the present invention;
FIG. 2 is a perspective view of a preferred embodiment of the workstation of the present invention;
FIG. 3 is an exploded view of the interior of the communication head of the present invention;
fig. 4 is a schematic view of the internal structure of the communication head of the present invention;
FIG. 5 is a longitudinal cross-sectional view of the seal and filter assembly of the present invention;
FIG. 6 is a schematic view of a seal of the present invention sealing a workpiece;
FIG. 7 is a schematic view of the seal assembly of the present invention pushing the filter assembly into rotation.
In the figure:
1. a work table; 2. a support tube; 3. A communication head; 30. a sliding groove; 31. an organ plate; 4. a receiving tube; 40. an inclined plane;
5. a sealing part; 51. a pushing block; 52. sealing sleeve; 53. A seal assembly; 531. a seal ring; 532. a contact block; 533. a one-way valve;
6. a filter assembly; 61. a rotary tube; 62. an external thread; 63. a filter screen;
7. and a gas pipe.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
In a first embodiment, as shown in fig. 1 to 7, the present invention provides a negative pressure exhaust valve for grain storage equipment, comprising:
the device comprises a workbench 1, a support tube 2, a communication head 3, a containing tube 4, a sealing part 5 and a filtering assembly 6, wherein the support tube 2 is vertically fixed on the workbench 1, and the support tube 2 is hollow; the support pipes 2 are multiple, the support pipes 2 are fixed on the workbench 1 at equal intervals, and the support pipes 2 can simultaneously vacuumize a plurality of workpieces; the workpiece is a columnar hollow glass tube for an exposure lamp, one end of the columnar hollow glass tube is sealed, and the other end of the columnar hollow glass tube is open. The communication head 3 is fixed at the upper end of the support tube 2, the inside of the communication head 3 is hollow, and the communication head 3 is communicated with the support tube 2; the lower end of the workbench 1 is fixedly provided with a negative pressure air pump, and the supporting tube 2 is communicated with the negative pressure air pump. A plurality of air pipes are arranged on the negative pressure air pump, one air pipe corresponds to one supporting pipe 2, and the air pipes are used for communicating the supporting pipe 2 with the negative pressure air pump; the accommodating pipe 4 is vertically fixed on the side wall of the communication head 3, the inner diameter of the accommodating pipe 4 is not smaller than the outer diameter of a workpiece, and the accommodating pipe 4 is communicated with the communication head 3; the sealing part 5 is slidably arranged on the accommodating tube 4 near the communication head 3, and the sealing part 5 is suitable for sealing a workpiece so as to prevent air from entering the communication head 3 from the outer wall of the workpiece; the filter assembly 6 is rotatably arranged in the communication head 3, the filter assembly 6 is suitable for opening or closing the support tube 2, and when the filter assembly 6 rotates circumferentially, a suction port of the support tube 2 can be in an open or closed state so as to prevent dust from entering the negative pressure air pump through the communication head 3; and the filter assembly 6 is linked with the sealing part 5; wherein the end part of the workpiece is inserted into the accommodating tube 4, the inner end part of the workpiece is inserted into the rotating tube 61, and the sealing part 5 is horizontally slid so that the inner wall of the sealing part 5 tightly holds and seals the workpiece in the circumferential direction; the sealing part 5 can automatically adapt to and seal workpieces with different pipe diameters according to the different pipe diameters of the workpieces; air in the workpiece is vacuumized by the support tube 2 after being filtered by the filtering component 6; compared with the traditional method that the workpieces with different pipe diameters are adapted to the frequent replacement of the sealing heads, the accommodating pipe 4 and the sealing part 5 can be arranged to automatically adapt to the sealing of the workpieces with different pipe diameters, the frequent replacement of the sealing heads is avoided, and the working efficiency is improved; when the work piece is vacuumized, the negative pressure air pump pumps air in the work piece, the air flows to the negative pressure air pump after being filtered and intercepted by the filtering component 6, and the filtering component 6 can prevent dust in the work piece from entering the negative pressure air pump, so that the service life of equipment is influenced. After the air in the workpiece is vacuumized, the air pipe 7 can inject inert gas into the workpiece, and then the port of the workpiece is sealed by using coal oxygen fire on the outer wall of the workpiece; at this time, the work piece may remain partially in the accommodating tube 4. The sealing part 5 is reversely slid, the clamping seal of the residual section of the workpiece is loosened by the sealing part 5, and the residual workpiece is taken down; the sealing part 5 can drive the filter assembly 6 to rotate circumferentially and press the filter assembly 6 to filter and intercept dust and discharge the communication head 3. The vacuum pumping work of the next workpiece is prevented from being influenced by dust intercepted by the filtering component 6, and the vacuum pumping quality of the workpiece is improved while the working efficiency is improved.
In order to adapt to workpieces of different pipe diameters, the sealing portion 5 comprises: the sealing device comprises a plurality of sealing cylinders, a plurality of pushing blocks 51, a plurality of sealing sleeves 52 and sealing assemblies 53, wherein one sealing cylinder corresponds to one pushing block 51 and one sealing sleeve 52, three sealing cylinders are arranged, and the three sealing cylinders are circumferentially arranged around the communication head 3; the sealing cylinder is horizontally fixed on the outer wall of the communication head 3, is arranged along the axial direction of the communication head 3, and the end part of a piston rod of the sealing cylinder faces the accommodating tube 4; the sealing sleeves 52 are slidably arranged in the accommodating pipe 4, each sealing sleeve 52 is arc-shaped, and a plurality of sealing sleeves 52 are spliced into an oblong shape; when the sealing cylinder drives the sealing sleeve 52 to slide horizontally along the axial direction of the accommodating pipe 4, the inner diameter of a circular ring formed by the three sealing sleeves 52 can be changed from small to large or from large to small, so that the sealing cylinder is suitable for workpieces with different pipe diameters. A pushing block 51 corresponds to a sealing sleeve 52, the pushing block 51 is vertically fixed on the outer wall of the sealing sleeve 52, and the pushing block 51 protrudes out of the outer wall of the accommodating tube 4; a sliding groove 30 is formed in the outer walls of the accommodating pipe 4 and the communication head 3, a telescopic organ plate 31 is arranged in the sliding groove 30, and the organ plate 31 can seal the sliding groove 30; the pushing block 51 is slidably arranged in the sliding groove 30; the pushing block 51 penetrates through the organ plate 31, and the pushing block 51 is in sliding sealing with the organ plate 31; when the pushing block 51 slides horizontally along the sliding groove 30, the pushing block 51 presses the organ plate 31 to deform, and the organ plate 31 can always keep the sliding groove 30 in a sealed state. A vertical chute is formed in the side wall of the pushing block 51, and the end part of the piston rod of the sealing cylinder is slidably arranged in the vertical chute; the sealing cylinder is suitable for pushing the pushing block 51 to slide horizontally along the sliding groove 30, and meanwhile, the end part of a piston rod of the sealing cylinder can slide vertically along a vertical sliding groove on the side wall of the pushing block 51; the sealing cylinder can push the pushing block 51 to slide horizontally, and the pushing block 51 can slide vertically relative to the sealing cylinder, namely, the pushing block 51 can slide along the radial direction of the accommodating tube 4; the sealing component 53 is fixed on the inner wall of the sealing sleeve 52, the sealing component 53 is a closed circular ring, the sealing component 53 is made of elastic materials, and the sealing component 53 can be expanded outwards and stretched and can also be contracted inwards to move; when the pushing block 51 is driven by the sealing cylinder to horizontally move towards the workpiece, the pushing block 51 drives the sealing sleeves 52 to horizontally move towards the workpiece and enable two adjacent sealing sleeves 52 to oppositely move, so that the sealing assembly 53 abuts against the outer wall of the workpiece and tightly seals the outer wall of the workpiece; the arrangement of the three sealing sleeves 52 and the matching of the sealing components 53 enable the sealing part 5 to adapt to workpieces with different pipe diameters, the sealing components 53 not only can seal the outer walls of the workpieces, but also enable the negative pressure air pump to vacuumize the workpieces, meanwhile, the three sealing sleeves 52 slide in opposite directions or in opposite directions, the sealing components 53 can prop against and seal the outer walls of the workpieces with different pipe diameters, and the universality of equipment is improved. The sealing cylinder drives the pushing block 51 to move towards the direction of the filter assembly 6, the sealing sleeve 52 horizontally slides along the outer wall of the filter assembly 6, the sealing assembly 53 pushes the filter assembly 6 to circumferentially rotate, the filter screen 63 of the filter assembly 6 rotates from the lower part of the filter assembly 6 to the upper part, the filter screen 63 in the filter assembly 6 is extruded by the sealing assembly 53, dust filtered and intercepted by the filter screen 63 can be cleaned and falls into the inner wall of the filter assembly 6, and compressed air is blown into the filter assembly 6 through the air conveying pipe 7, so that the dust is discharged out of the communication head 3, and the cleanliness in the communication head 3 is improved.
In order to enable the three sealing sleeves 52 to slide towards each other or away from each other, a slope is arranged on the outer wall of the sealing sleeve 52, and a slope 40 matched with the slope is arranged on the inner wall of the accommodating tube 4; the inclined plane 40 is consistent with the inclined angle of the inclined plane, when the sealing sleeve 52 slides towards the accommodating pipe 4, the inner diameter of a circular ring formed by the three sealing sleeves 52 is reduced, and when the sealing sleeve 52 slides towards the gas pipe 7, the inner diameter of a circular ring formed by the three sealing sleeves 52 is increased; the pushing block 51 drives the sealing sleeve 52 to slide horizontally until the slope of the outer wall of the sealing sleeve 52 abuts against the inclined surface 40, and continues to drive the sealing sleeve 52, so that the sealing sleeve 52 can slide along the inclined surface 40 towards the axial direction of the accommodating tube 4, and the sealing sleeve 52 is close to the outer wall of the workpiece.
To seal a workpiece, the seal assembly 53 includes: the sealing sleeve 52 comprises a sealing ring 531, two contact blocks 532 and two one-way valves 533, wherein a fixing groove is formed in the inner wall of each sealing sleeve 52, the fixing groove is circumferentially arranged along the sealing ring 531, the sealing ring 531 is telescopically arranged in the fixing groove, and the sealing ring 531 protrudes out of the inner wall of the sealing sleeve 52; two limiting plates are arranged in the fixed groove, the limiting plates are arranged along the circumferential direction of the fixed groove, and the limiting plates can prevent the sealing ring 531 from being separated from the fixed groove; the seal ring 531 is made of elastic materials, the interior of the seal ring 531 is hollow, and the seal ring 531 is suitable for storing lubricating oil; the two contact blocks 532 are respectively arranged at two sides of the sealing ring 531, and the two contact blocks 532 are respectively and slidably arranged at the inner wall of the sealing sleeve 52; each two of the contact blocks 532 corresponds to one of the sealing sleeves 52. Two sides of the sealing ring 531 are respectively provided with an oil spray hole, each oil spray hole is internally provided with a one-way valve 533, one-way valve 533 corresponds to one contact block 532, and the contact block 532 is linked with the one-way valve 533; an oil outlet communicated with the oil spraying hole is formed in the contact block 532; after the sealing ring 531 abuts against the outer wall of the workpiece, the three sealing sleeves 52 squeeze the sealing ring 531, so that the sealing ring 531 contracts and tightly seals the outer wall of the workpiece in a circumferential manner; at this time, the workpiece presses the seal ring 531 to deform, so that the seal ring 531 presses the two contact blocks 532 to slide to both sides, and the check valve 533 is in a closed state.
In order to limit the sliding direction of the two contact blocks 532, a limit groove is formed in the inner wall of the seal sleeve 52, and the limit groove is arranged along the axial direction of the seal sleeve 52; the contact block 532 is fixed with a fixing block adapted to the limit slot, and the fixing block is adapted to slide horizontally along the limit slot.
For filtering the intercepted dust, the filtering assembly 6 comprises: a rotation pipe 61, an external thread 62 and a filter screen 63, wherein the rotation pipe 61 is axially arranged along the accommodating pipe 4, and the rotation pipe 61 is rotatably arranged in the communication head 3; the rotating tube 61 is hollow, and one end of the rotating tube 61 facing the accommodating tube 4 is open; the inner diameter of the rotating tube 61 is larger than the outer diameter of the workpiece; the external thread 62 is fixed on one end of the rotating tube 61 close to the accommodating tube 4 in a spiral manner; the distance between two external threads 62 adjacent to the outer wall of the rotating tube 61 is larger than the distance between two contact blocks 532. A through hole is formed in the rotating pipe 61, the filter screen 63 is fixed in the through hole, and the filter screen 63 is suitable for filtering and intercepting dust; in the initial state, the filter screen 63 faces the support tube 2, when the negative pressure air pump sucks a workpiece, air in the workpiece flows to the support tube 2 after passing through the filter screen 63, and the filter screen 63 can intercept dust in the workpiece; after the workpiece is vacuumized and inert gas is injected, a port of the workpiece is sealed by using coal oxygen fire; at this time, part of the workpiece still remains in the accommodating tube 4, and the sealing cylinder drives the pushing block 51 to move towards the air conveying tube 7, so that part of the workpiece remaining in the accommodating tube 4 can be taken out conveniently; the pushing block 51 drives the sealing sleeve 52 to move towards the rotating tube 61, the sealing sleeve 52 drives the sealing ring 531 to expand outwards from a contracted state, and the contact block 532 abuts against the external thread 62 and pushes the rotating tube 61 to rotate circumferentially, so that the rotating tube 61 closes the supporting tube 2; in the process of driving the rotating tube 61 to circumferentially rotate by the contact block 532, the contact block 532 is pressed by the external thread 62, and the contact block 532 presses the sealing ring 531 to open the one-way valve 533, so that the lubricating oil in the sealing ring 531 is sprayed to the side wall of the external thread 62; so that the friction between the contact block 532 and the external screw thread 62 is reduced. Continuing to drive the sealing sleeve 52 to move horizontally, at the moment, the contact block 532 is separated from the external thread 62, and the contact block 532 is moved between the external thread 62 and the gas pipe 7; at this time, the rotating pipe 61 rotates 180 degrees circumferentially, the filter screen 63 abuts against a sealing ring 531 located above the filter screen 63, at this time, the extrusion force of the external thread 62 corresponding to the contact block 532 disappears, the sealing ring 531 extrudes the outer wall of the filter screen 63, meanwhile, in the process of rubbing along the outer wall of the filter screen 63 and moving horizontally, the sealing ring 531 can remove dust intercepted on the filter screen 63 and enable the dust to fall into the rotating pipe 61, and at this time, the air pipe 7 conveys compressed air into the rotating pipe 61, and can blow the dust in the rotating pipe 61 out of the communication head 3.
Preferably, a gas pipe 7 is fixed on a side of the communicating head 3 away from the accommodating pipe 4, the gas pipe 7 is communicated with the accommodating pipe 4, the gas pipe 7 is suitable for conveying inert gas into a workpiece, and the gas pipe 7 can also convey compressed air into the rotating pipe 61, so as to purge dust in the communicating head 3.
An embodiment two, the present embodiment also provides an exhaust process of a negative pressure exhaust valve for grain storage equipment on the basis of the embodiment one, which includes a negative pressure exhaust valve for grain storage equipment as described in embodiment one, and its specific structure is the same as that of embodiment one, and is not described in detail here, and the exhaust process of a negative pressure exhaust valve for grain storage equipment is as follows:
after the end part of the workpiece is inserted into the accommodating tube 4, the inner end part of the workpiece is positioned in the rotating tube 61, the pushing block 51 is driven by the sealing cylinder to horizontally move towards the workpiece direction, the sealing sleeve 52 is driven by the pushing block 51 to synchronously horizontally slide towards the workpiece direction, and simultaneously, the sealing sleeve 52 slides towards the axis direction of the accommodating tube 4 under the guidance of the inclined plane 40, so that two adjacent sealing sleeves 52 synchronously move towards each other; until the sealing ring 531 abuts against the outer wall of the workpiece, the sealing ring 531 can tightly seal the outer wall of the workpiece; at this time, the filter screen 63 faces the support pipe 2, and when the negative pressure air pump pumps, the negative pressure air pump can pump air and dust in a workpiece outwards, and the filter screen 63 can intercept and filter the dust to prevent the dust from entering the negative pressure air pump; after the vacuumizing is finished, the negative pressure air pump stops working, and the air pipe 7 conveys inert gas into the workpiece; sealing the workpiece port by using coal oxygen fire; the sealing cylinder drives the pushing block 51 to move reversely so that the residual section of the workpiece can be taken out from the accommodating tube 4; the sealing cylinder continuously drives the pushing block 51 to move towards the air delivery pipe 7 so as to enable the sealing sleeve 52 to axially slide along the outer wall of the rotating pipe 61, the contact block 532 abuts against the side wall of the external thread 62 and continuously moves towards the air delivery pipe 7 along with the sealing sleeve 52, and the contact block 532 pushes the external thread 62 so as to enable the rotating pipe 61 to axially rotate, so that the through hole faces the side wall of the communication head 3; synchronously, in the process that the contact block 532 abuts against the external thread 62, the external thread 62 presses the contact block 532 to slide towards the sealing ring 531, so that the lubricating oil in the sealing ring 531 can be sprayed to the side wall of the external thread 62; when the contact block 532 is separated from the external thread 62, the filter 63 is circumferentially rotated 180 ° so that the filter 63 abuts against a seal ring 531; at this time, the vacuumizing of one workpiece is finished; before the next workpiece is inserted into the accommodating tube 4, the sealing cylinder drives the pushing block 51 to move towards the accommodating tube 4, the sealing ring 531 presses the filter screen 63 to remove dust on the filter screen 63, so that the dust falls into the rotating cylinder, and at the moment, the air pipe 7 blows air inwards to discharge the dust out of the accommodating tube 4; at the same time, the pushing block 51 drives the filter screen 63 to circumferentially rotate to be communicated with the support pipe 2.
The above-described preferred embodiments according to the present invention are intended to suggest that, in view of the above description, various changes and modifications may be made by the worker in question without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (11)
1. A negative pressure exhaust valve for grain storage equipment is characterized in that,
comprising the following steps: the device comprises a workbench (1), a support tube (2), a communication head (3), a containing tube (4), a sealing part (5) and a filtering assembly (6), wherein the support tube (2) is vertically fixed on the workbench (1), and the interior of the support tube (2) is hollow;
the communication head (3) is fixed at the upper end of the support tube (2), the inside of the communication head (3) is hollow, and the communication head (3) is communicated with the support tube (2);
the accommodating pipe (4) is vertically fixed on the side wall of the communication head (3), the inner diameter of the accommodating pipe (4) is not smaller than the outer diameter of a workpiece, and the accommodating pipe (4) is communicated with the communication head (3);
the sealing part (5) is slidably arranged at the position, close to the communication head (3), of the accommodating tube (4), and the sealing part (5) is suitable for sealing a workpiece;
the filter assembly (6) is rotatably arranged in the communication head (3), the filter assembly (6) is suitable for opening or closing the support tube (2), and the filter assembly (6) is linked with the sealing part (5); wherein the method comprises the steps of
After the end part of the workpiece is inserted into the accommodating tube (4), the sealing part (5) is horizontally slid so as to tightly hold and seal the workpiece along the circumferential direction of the inner wall of the sealing part (5);
air in the workpiece is vacuumized by the support tube (2) after being filtered by the filtering component (6);
the sealing part (5) slides reversely, the sealing part (5) can drive the filter assembly (6) to rotate circumferentially and press the filter assembly (6) to enable the filter assembly to filter and intercept dust and discharge the communication head (3).
2. A negative pressure vent valve for grain storage equipment as claimed in claim 1,
the lower end of the workbench (1) is fixedly provided with a negative pressure air pump, and the supporting tube (2) is communicated with the negative pressure air pump.
3. A negative pressure vent valve for grain storage equipment as claimed in claim 2,
the seal (5) comprises: the sealing cylinders are horizontally fixed on the outer wall of the communication head (3), and the end parts of piston rods of the sealing cylinders face the containing tube (4);
the sealing sleeves (52) are slidably arranged in the accommodating pipe (4), each sealing sleeve (52) is arc-shaped, and a plurality of sealing sleeves (52) are spliced into an oblong shape;
a pushing block (51) corresponds to a sealing sleeve (52), the pushing block (51) is vertically fixed on the outer wall of the sealing sleeve (52), and the pushing block (51) protrudes out of the outer wall of the accommodating tube (4);
the accommodating pipe (4) and the outer wall of the communication head (3) are provided with a sliding groove (30), a telescopic organ plate (31) is arranged in the sliding groove (30), and the pushing block (51) is slidably arranged in the sliding groove (30);
a vertical chute is formed in the side wall of the pushing block (51), and the end part of a piston rod of the sealing cylinder is slidably arranged in the vertical chute;
the sealing component (53) is fixed on the inner wall of the sealing sleeve (52), and the sealing component (53) is made of elastic materials; wherein the method comprises the steps of
When the pushing block (51) is driven by the sealing cylinder to horizontally move towards the workpiece, the sealing sleeves (52) are driven by the pushing block (51) to horizontally move towards the workpiece, and the adjacent two sealing sleeves (52) are driven to move towards each other, so that the sealing assembly (53) is propped against the outer wall of the workpiece and tightly seals the outer wall of the workpiece;
the sealing cylinder drives the pushing block (51) to move towards the filtering component (6), the sealing sleeve (52) horizontally slides along the outer wall of the filtering component (6), so that the sealing component (53) pushes the filtering component (6) to circumferentially rotate, and the filtering component (6) is extruded to enable dust intercepted by filtering to be discharged out of the communication head (3).
4. A negative pressure vent valve for grain storage equipment as claimed in claim 3,
the outer wall of the sealing sleeve (52) is provided with a slope, and the inner wall of the accommodating tube (4) is provided with an inclined plane (40) matched with the slope; wherein the method comprises the steps of
When the pushing block (51) drives the slope of the outer wall of the sealing sleeve (52) to prop against the inclined surface (40), the sealing sleeve (52) is continuously driven, so that the sealing sleeve (52) can slide along the inclined surface (40) towards the axial direction of the accommodating tube (4).
5. The negative pressure exhaust valve for grain storage equipment of claim 4, wherein,
the seal assembly (53) comprises: the sealing device comprises a sealing ring (531) and two contact blocks (532), wherein a fixing groove is formed in the inner wall of each sealing sleeve (52), the sealing ring (531) is arranged in the fixing groove in a telescopic mode, and the sealing ring (531) protrudes out of the inner wall of each sealing sleeve (52);
the two contact blocks (532) are respectively arranged at two sides of the sealing ring (531), and the two contact blocks (532) are respectively and slidably arranged at the inner wall of the sealing sleeve (52);
wherein the method comprises the steps of
After the sealing ring (531) is propped against the outer wall of the workpiece, the sealing ring (531) is suitable for tightly sealing the outer wall of the workpiece;
the workpiece presses the sealing ring (531) to deform, so that the sealing ring (531) presses the two contact blocks (532) to slide to two sides.
6. The negative pressure exhaust valve for grain storage equipment according to claim 5, wherein,
the sealing ring (531) is elastic material, the inside of sealing ring (531) is hollow, be suitable for in sealing ring (531) to store lubricating oil.
7. The negative pressure exhaust valve for grain storage equipment of claim 6, wherein,
two sides of the sealing ring (531) are respectively provided with an oil injection hole, each oil injection hole is internally provided with a one-way valve (533), one-way valve (533) corresponds to one contact block (532), and the contact block (532) is linked with the one-way valve (533).
8. The negative pressure exhaust valve for grain storage equipment according to claim 7, wherein,
a limit groove is formed in the inner wall of the sealing sleeve (52), and the limit groove is axially formed along the sealing sleeve (52);
the contact block (532) is fixedly provided with a fixed block matched with the limit groove, and the fixed block is suitable for sliding horizontally along the limit groove.
9. The negative pressure exhaust valve for grain storage equipment according to claim 8, wherein,
the filter assembly (6) comprises: a rotating pipe (61), external threads (62) and a filter screen (63), wherein the rotating pipe (61) is axially arranged along the accommodating pipe (4), and the rotating pipe (61) is rotatably arranged in the communication head (3);
the inside of the rotating pipe (61) is hollow, and one end of the rotating pipe (61) facing the accommodating pipe (4) is open;
the external thread (62) is spirally fixed at one end of the rotating tube (61) close to the accommodating tube (4);
a through hole is formed in the rotating pipe (61), the filter screen (63) is fixed in the through hole, and the filter screen (63) is suitable for filtering and intercepting dust; wherein the method comprises the steps of
In an initial state, the filter screen (63) faces the supporting tube (2), and when the negative pressure air pump sucks a workpiece, the filter screen (63) can intercept dust;
the pushing block (51) drives the sealing sleeve (52) to move towards the rotating pipe (61), and the contact block (532) abuts against the external thread (62) and pushes the rotating pipe (61) to rotate circumferentially so that the rotating pipe (61) closes the supporting pipe (2);
the contact block (532) presses the sealing ring (531) to open the one-way valve (533) so that lubricating oil in the sealing ring (531) is sprayed to the side wall of the external thread (62);
and continuously driving the sealing sleeve (52) to horizontally move so that the sealing ring (531) presses the filter screen (63) to remove dust on the filter screen (63).
10. The negative pressure exhaust valve for grain storage equipment of claim 9, wherein,
one side of the communication head (3) far away from the accommodating pipe (4) is fixedly provided with a gas pipe (7), the gas pipe (7) is communicated with the accommodating pipe (4), and the gas pipe (7) is suitable for conveying inert gas into a workpiece.
11. An exhaust process of a negative pressure exhaust valve for grain storage equipment, which is characterized by comprising the negative pressure exhaust valve for grain storage equipment according to claim 10,
after the end part of the workpiece is inserted into the accommodating tube (4), the sealing cylinder drives the pushing block (51) to horizontally move towards the direction of the workpiece, the pushing block (51) drives the sealing sleeves (52) to horizontally slide towards the direction of the workpiece synchronously, and meanwhile, the sealing sleeves (52) slide towards the axis direction of the accommodating tube (4) under the guidance of the inclined plane (40) so as to enable two adjacent sealing sleeves (52) to synchronously move towards each other; until the sealing ring (531) is propped against the outer wall of the workpiece, the sealing ring (531) can tightly seal the outer wall of the workpiece in a clasping way; at the moment, the filter screen (63) faces the supporting tube (2), and when the negative pressure air pump pumps work, the negative pressure air pump can pump air and dust in a workpiece outwards, and the filter screen (63) can intercept and filter dust and prevent the dust from entering the negative pressure air pump; after the vacuumizing is finished, the negative pressure air pump stops working, and the air pipe (7) conveys inert gas into the workpiece; sealing the workpiece port by using coal oxygen fire; the sealing cylinder drives the pushing block (51) to move reversely so that the residual section of the workpiece can be taken out from the accommodating tube (4); the sealing cylinder continuously drives the pushing block (51) to move towards the air conveying pipe (7) so as to enable the sealing sleeve (52) to axially slide along the outer wall of the rotating pipe (61), the contact block (532) is abutted against the side wall of the external thread (62) and moves towards the air conveying pipe (7) along with the sealing sleeve (52), and the contact block (532) pushes the external thread (62) so as to enable the rotating pipe (61) to axially rotate, so that the through hole faces the side wall of the communicating head (3); synchronously, in the process that the contact block (532) is propped against the external thread (62), the external thread (62) presses the contact block (532) to slide towards the sealing ring (531), so that lubricating oil in the sealing ring (531) can be sprayed to the side wall of the external thread (62); when the contact block (532) is separated from the external thread (62), the filter screen (63) rotates 180 degrees circumferentially, so that the filter screen (63) is abutted against a sealing ring (531); at this time, the vacuumizing of one workpiece is finished; before the next workpiece is inserted into the accommodating pipe (4), the sealing cylinder drives the pushing block (51) to move towards the accommodating pipe (4), the sealing ring (531) presses the filter screen (63) to remove dust on the filter screen (63) and enable the dust to fall into the rotating cylinder, and at the moment, the air conveying pipe (7) blows air inwards to discharge the dust out of the accommodating pipe (4); simultaneously, the pushing block (51) drives the filter screen (63) to circumferentially rotate to be communicated with the supporting tube (2).
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| CN202310932299.3A CN116658655B (en) | 2023-07-27 | 2023-07-27 | Negative pressure exhaust valve for grain storage equipment and exhaust process |
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| CN202310932299.3A CN116658655B (en) | 2023-07-27 | 2023-07-27 | Negative pressure exhaust valve for grain storage equipment and exhaust process |
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