CN219916986U - Positive pressure anti-blocking type anti-rotation switch - Google Patents
Positive pressure anti-blocking type anti-rotation switch Download PDFInfo
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- CN219916986U CN219916986U CN202321090186.5U CN202321090186U CN219916986U CN 219916986 U CN219916986 U CN 219916986U CN 202321090186 U CN202321090186 U CN 202321090186U CN 219916986 U CN219916986 U CN 219916986U
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- protective tube
- transmission shaft
- wall
- blocking
- sealing
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- 238000007789 sealing Methods 0.000 claims abstract description 95
- 230000005540 biological transmission Effects 0.000 claims abstract description 56
- 230000001681 protective effect Effects 0.000 claims abstract description 56
- 238000007664 blowing Methods 0.000 claims abstract description 18
- 230000000903 blocking effect Effects 0.000 claims description 27
- 210000001503 joint Anatomy 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims 1
- 239000010883 coal ash Substances 0.000 abstract description 23
- 239000002956 ash Substances 0.000 description 18
- 238000005299 abrasion Methods 0.000 description 8
- 238000009825 accumulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Sealing Devices (AREA)
Abstract
The utility model provides a positive pressure anti-blocking type anti-rotation switch, which comprises a motor and a protective tube, wherein a flange head is arranged on the protective tube, the positive pressure anti-blocking type anti-rotation switch further comprises a transmission shaft which is positioned in the protective tube, one end of the transmission shaft is connected with the motor, the other end of the transmission shaft extends out of the protective tube and is connected with blades, an air supply port which is communicated with an inner cavity of the protective tube is arranged on the wall of the protective tube, and an air blowing gap which enables compressed air entering from the air supply port to blow out towards the direction of one end of the transmission shaft, which is provided with the blades, is reserved between the inner wall of the protective tube and the outer wall of the transmission shaft. The utility model has the advantages of effectively preventing coal ash from entering and effectively sealing in a shutdown state.
Description
Technical Field
The utility model relates to the field of anti-rotation switches, in particular to a positive pressure anti-blocking anti-rotation switch.
Background
The rotation-resisting switch comprises a motor, a protective tube and a flange head, wherein the motor is connected with a transmission shaft, penetrates through the protective tube to extend to the outside and is provided with blades, and the rotation-resisting switch can be applied to the measurement of solid materials such as powder, grains, colloid and the like. The spring tension can be adjusted for materials with different specific gravities, and the spring tension is widely used in the industries of chemical industry, plastics, cement, pharmacy, feed, food and the like; although the existing rotation-resistant switch is provided with a sealing bearing between a protective tube and a transmission shaft, the existing rotation-resistant switch is easy to gather and cover at the position when in use, especially under a coal ash medium, and after long-term use, the existing rotation-resistant switch gradually wears the sealing bearing and invades into the protective tube, and further reaches the positions such as a motor to increase resistance so as not to continue rotating, thereby generating false alarm and paralysis.
Disclosure of Invention
Based on the above problems, the utility model aims to provide a positive pressure anti-blocking type rotation-blocking switch which can effectively prevent coal ash from entering and can effectively seal in a stop state.
Aiming at the problems, the following technical scheme is provided: the positive pressure anti-blocking type anti-rotation switch comprises a motor and a protection tube, wherein a flange head is arranged on the protection tube, one end of the flange head is connected with the motor, the other end of the flange head extends out of the protection tube and is connected with a transmission shaft of a blade, an air supply port communicated with an inner cavity of the protection tube is formed in a wall of the protection tube on one side of the direction of the motor, and an air blowing gap for enabling compressed air entering from the air supply port to blow out towards one end direction of the transmission shaft, provided with the blade, is reserved between the inner wall of the protection tube and the outer wall of the transmission shaft.
In the structure, compressed air is introduced into the protective tube, so that the air is blown out in the blowing gap between the inner wall of the protective tube and the outer wall of the transmission shaft, and the medium such as coal ash is prevented from entering the protective tube and reaching the motor to influence the rotation, so that the transmission shaft always keeps smooth rotation.
The utility model is further provided that the end part of the protective tube of the flange head, which is back to the motor, is provided with a protective tube sealing head for the transmission shaft to pass through, a unidirectional sealing bowl is arranged between the protective tube sealing head and the end part of the protective tube, the center of the unidirectional sealing bowl is provided with a sealing lip for the transmission shaft to pass through, the section of the sealing lip is funnel-shaped, and the conical tip faces the direction of the blade; the sealing lip is in contact sealing with the outer wall of the transmission shaft when compressed air is not supplied into the air supply port; the inner diameter of the sealing lip is enlarged after compressed air is supplied into the air supply port, and the sealing lip is in clearance fit with the outer wall of the transmission shaft.
In the structure, when the compressed air stops supplying, coal ash enters the blowing gap in a fine air flowing or diffusing mode, so that the unidirectional sealing bowl is arranged, and when the compressed air is normally supplied, the sealing lip is spread by forward pressure and keeps clearance fit with the outer wall of the transmission shaft, so that contact and abrasion of the sealing lip and the outer wall of the transmission shaft are avoided; after stopping, the compressed air stops supplying, the forward pressure disappears, the sealing lip contracts and resets and is in contact with the outer wall of the transmission shaft in a propping mode, so that coal ash is prevented from entering a blowing gap in a fine air flowing or diffusing mode, when the compressed air starts next time, the sealing lip is re-spread by the compressed air and the coal ash on the outer side of the sealing lip is blown off, the sealing lip is ensured to be always in a clean state, and meanwhile abrasion of the sealing lip due to contact with the transmission shaft in a rotating state is also effectively avoided.
The utility model further provides an ash blocking cylinder, wherein an outer shoulder is arranged on the outer wall of one end of the ash blocking cylinder, the ash blocking cylinder is inserted into the protective tube sealing head, one end of the ash blocking cylinder, which is not provided with the outer shoulder, extends towards the direction of the blade, and the outer shoulder is clamped between the protective tube sealing head and the unidirectional sealing bowl.
In the structure, the ash blocking cylinder can be used for blocking coal ash falling by self weight, so that large-particle coal ash is prevented from falling on the sealing lip of the unidirectional sealing bowl as far as possible.
The utility model is further arranged that the protective tube sealing head is in threaded fit with the outer wall of the end part of the protective tube, an inner retaining shoulder is arranged on the inner wall of one end of the protective tube sealing head, which is opposite to the motor, and the inner retaining shoulder and the outer retaining shoulder are propped against each other to press the outer retaining shoulder on the unidirectional sealing bowl.
The utility model is further characterized in that the end face of the ash blocking cylinder, which faces one end of the blade, is provided with an ash discharging chamfer inclined towards the sealing head direction of the protective tube from the position of 3 o ' clock to the position of 9 o ' clock to the position of 6 o ' clock.
In the structure, the ash discharge chamfer can prevent the accumulation of coal ash in the ash blocking cylinder.
The utility model is further arranged that the inner wall of one end of the protective tube, which is close to the protective tube sealing head, is provided with a support bearing for supporting the transmission shaft.
In the structure, the supporting bearing can improve the rigidity of the transmission shaft.
The utility model is further characterized in that the air supply port is provided with a butt joint thread, and the butt joint thread is screwed with an air supply joint.
The flange head is further provided with a fixed external thread, and the fixed external thread is provided with a gasket and a fixed nut.
The utility model has the beneficial effects that: compressed air is introduced into the protective tube, so that the air is blown out in an air blowing gap between the inner wall of the protective tube and the outer wall of the transmission shaft, and the medium such as coal ash is prevented from entering the protective tube and reaching the motor to influence rotation, so that the transmission shaft always keeps smooth rotation; considering that when the compressed air stops being supplied in a stop state, coal ash can enter the blowing gap in a fine air flowing or diffusing mode, a one-way sealing bowl is arranged, and when the compressed air is normally supplied, the sealing lip is propped up under forward pressure and keeps clearance fit with the outer wall of the transmission shaft, so that contact and abrasion of the sealing lip and the outer wall of the transmission shaft are avoided; after stopping, the compressed air stops supplying, the forward pressure disappears, the sealing lip contracts and resets and is in contact with the outer wall of the transmission shaft in a propping mode, so that coal ash is prevented from entering a blowing gap in a fine air flowing or diffusing mode, when the compressed air starts next time, the sealing lip is re-spread by the compressed air and the coal ash on the outer side of the sealing lip is blown off, the sealing lip is ensured to be always in a clean state, and meanwhile abrasion of the sealing lip due to contact with the transmission shaft in a rotating state is also effectively avoided.
Drawings
Fig. 1 is a schematic perspective view of the present utility model.
Fig. 2 is a schematic view of a partial cross-section of the present utility model.
Fig. 3 is a schematic diagram of an explosive structure according to the present utility model.
Fig. 4 is an exploded cross-sectional view of the present utility model.
The meaning of the reference numerals in the figures: 10-an electric motor; 11-leaf; 12-a transmission shaft; 20-protecting tube; 21-a flange head; 211-fixing external threads; 212-washers; 213-a fixing nut; 22-an air supply port; 221-mating threads; 23-supporting bearings; 24-an air supply joint; 30-protecting tube sealing heads; 31-inner shoulder; 40-one-way sealing bowl; 41-a sealing lip; 50-ash blocking cylinder; 51-an outer shoulder; 52-ash discharge chamfering; a-blowing gap.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
Referring to fig. 1 to 4, a positive pressure anti-blocking type rotation-blocking switch as shown in fig. 1 to 4 comprises a motor 10 and a protective tube 20, wherein the protective tube 20 is provided with a flange head 21, the switch further comprises a transmission shaft 12 which is positioned in the protective tube 20, one end of the transmission shaft is connected with the motor 10, the other end of the transmission shaft extends out of the protective tube 20 and is connected with blades 11, an air supply port 22 which is communicated with an inner cavity of the protective tube 20 is arranged on a tube wall of the protective tube 20 on one side of the flange head 21 in the direction of the motor 10, and an air blowing gap a which enables compressed air entering from the air supply port 22 to blow out towards one end direction of the transmission shaft 12, wherein the blades 11 are arranged, is reserved between the inner wall of the protective tube 20 and the outer wall of the transmission shaft 12.
In the above-described structure, compressed air is introduced into the protection tube 20 to blow out air in the air blowing gap a between the inner wall of the protection tube 20 and the outer wall of the transmission shaft 12, so that the transmission shaft 12 is kept smoothly rotating all the time, and the medium such as coal ash is prevented from entering the protection tube 20 and reaching the motor 10 to affect rotation.
In this embodiment, a protecting tube sealing head 30 for the transmission shaft 12 to pass through is provided at the end of the protecting tube 20 of the flange head 21 facing away from the direction of the motor 10, a unidirectional sealing bowl 40 is provided between the protecting tube sealing head 30 and the end of the protecting tube 20, a sealing lip 41 for the transmission shaft 12 to pass through is provided at the center of the unidirectional sealing bowl 40, the cross section of the sealing lip 41 is funnel-shaped, and the taper point faces the direction of the blade 11; the sealing lip 41 is in contact with and seals with the outer wall of the transmission shaft 12 when the compressed air is not supplied to the air supply port 22; the sealing lip 41 has a large inner diameter and is in clearance fit with the outer wall of the drive shaft 12 when compressed air is supplied from the air supply port 22.
In the above structure, when the compressed air stops supplying, the coal ash enters the blowing gap a by a fine air flowing or diffusing mode, so the unidirectional sealing bowl 40 is arranged, and when the compressed air is normally supplied, the sealing lip 41 is spread by forward pressure and keeps clearance fit with the outer wall of the transmission shaft 12, so that the contact and abrasion of the sealing lip and the outer wall are avoided; after the machine is stopped, the compressed air stops supplying, the forward pressure disappears, the sealing lip 41 contracts and resets and is in contact with the outer wall of the transmission shaft 12 in a propping mode, so that coal ash is prevented from entering the blowing gap a in a mode of fine air flow or diffusion, when the machine is started next time, the compressed air props up the sealing lip 41 again and blows off the coal ash outside the sealing lip 41, the sealing lip 41 is ensured to be always in a clean state, and meanwhile, the abrasion of the sealing lip 41 caused by contact with the transmission shaft 12 in a rotating state is also effectively avoided.
In this embodiment, the dust-blocking device further comprises a dust-blocking cylinder 50, an outer shoulder 51 is disposed on an outer wall of one end of the dust-blocking cylinder 50, the dust-blocking cylinder 50 is inserted into the protective tube sealing head 30, one end of the dust-blocking cylinder, which is not provided with the outer shoulder 51, extends towards the direction of the blade 11, and the outer shoulder 51 is clamped between the protective tube sealing head 30 and the unidirectional sealing bowl 40.
In the above structure, the ash blocking cylinder 50 can be used for blocking the ash falling by self weight, so as to prevent the large-particle ash from directly falling on the sealing lip 41 of the unidirectional sealing bowl 40 as much as possible.
In this embodiment, the protective tube sealing head 30 is in threaded fit with the outer wall of the end of the protective tube 20, an inner blocking shoulder 31 is disposed on the inner wall of the end of the protective tube sealing head 30 facing away from the motor 10, and the inner blocking shoulder 31 abuts against the outer blocking shoulder 51 to press the outer blocking shoulder 51 on the unidirectional sealing bowl 40.
In this embodiment, the end surface of the ash blocking cylinder 50 facing the blade 11 is provided with an ash discharge chamfer 52 inclined toward the protection pipe sealing head 30 from the position of 3 o ' clock to the position of 9 o ' clock to the position of 6 o ' clock.
In the above configuration, the ash discharge chamfer 52 can prevent the accumulation of coal ash in the ash blocking cylinder 50.
In this embodiment, the inner wall of the end of the protection tube 20 near the protection tube sealing head 30 is provided with a support bearing 23 for supporting the transmission shaft 12.
In the above structure, the support bearing 23 can improve the rigidity of the propeller shaft 12.
In this embodiment, the air supply port 22 is provided with a butt screw 221, and the butt screw 221 is screwed with an air supply connector 24.
In this embodiment, the flange head 21 is provided with a fixing external thread 211, and the fixing external thread 211 is provided with a washer 212 and a fixing nut 213.
The utility model has the beneficial effects that: compressed air is introduced into the protective tube 20, so that the air is blown out in a blowing gap a between the inner wall of the protective tube 20 and the outer wall of the transmission shaft 12, and mediums such as coal ash are prevented from entering the protective tube 20 and reaching the motor 10 to influence rotation, so that the transmission shaft 12 always keeps smooth rotation; considering that when the compressed air stops being supplied in a stop state, coal ash enters the blowing gap a in a fine air flowing or diffusing mode, a one-way sealing bowl 40 is arranged, and when the compressed air is normally supplied, a sealing lip 41 is propped up under forward pressure and keeps clearance fit with the outer wall of the transmission shaft 12, so that contact and abrasion of the sealing lip and the outer wall are avoided; after the machine is stopped, the compressed air stops supplying, the forward pressure disappears, the sealing lip 41 contracts and resets and is in contact with the outer wall of the transmission shaft 12 in a propping mode, so that coal ash is prevented from entering the blowing gap a in a mode of fine air flow or diffusion, when the machine is started next time, the compressed air props up the sealing lip 41 again and blows off the coal ash outside the sealing lip 41, the sealing lip 41 is ensured to be always in a clean state, and meanwhile, the abrasion of the sealing lip 41 caused by contact with the transmission shaft 12 in a rotating state is also effectively avoided.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (8)
1. The utility model provides a positive pressure prevents blocking type and hinders rotary switch, includes motor and pillar, be equipped with the flange head on the pillar, still including being located the pillar, one end links to each other with the motor, and the other end stretches out the pillar and is connected with the transmission shaft of blade, its characterized in that: an air supply port communicated with the inner cavity of the protective tube is formed in the wall of the protective tube on one side of the flange head towards the motor direction, and an air blowing gap for blowing compressed air entering from the air supply port out towards the direction of one end of the transmission shaft, provided with blades, is reserved between the inner wall of the protective tube and the outer wall of the transmission shaft.
2. A positive pressure anti-blocking rotary switch as claimed in claim 1, wherein: the flange head is provided with a protective tube sealing head which is used for the transmission shaft to pass through at the end part of the protective tube, a one-way sealing bowl is arranged between the protective tube sealing head and the end part of the protective tube, the center of the one-way sealing bowl is provided with a sealing lip which is used for the transmission shaft to pass through, and the section of the sealing lip is funnel-shaped and the conical tip faces the direction of the blade; the sealing lip is in contact sealing with the outer wall of the transmission shaft when compressed air is not supplied into the air supply port; the inner diameter of the sealing lip is enlarged after compressed air is supplied into the air supply port, and the sealing lip is in clearance fit with the outer wall of the transmission shaft.
3. A positive pressure anti-blocking rotary switch as claimed in claim 2, wherein: the dust blocking device comprises a protective tube sealing head, and is characterized by further comprising an ash blocking cylinder, wherein an outer blocking shoulder is arranged on the outer wall of one end of the ash blocking cylinder, the ash blocking cylinder is inserted into the protective tube sealing head, one end of the ash blocking cylinder, which is not provided with the outer blocking shoulder, extends towards the direction of a blade, and the outer blocking shoulder is clamped between the protective tube sealing head and the unidirectional sealing bowl.
4. A positive pressure anti-blocking rotary switch as claimed in claim 3, wherein: the protection tube sealing head is in threaded fit with the outer wall of the end part of the protection tube, an inner retaining shoulder is arranged on the inner wall of one end of the protection tube sealing head, which faces away from the motor, and the inner retaining shoulder and the outer retaining shoulder are propped against each other to press the outer retaining shoulder on the unidirectional sealing bowl.
5. A positive pressure anti-blocking rotary switch as claimed in claim 3, wherein: the end face of the ash blocking cylinder, which faces one end of the blade, is provided with an ash discharging chamfer inclined towards the sealing head direction of the protection pipe from the position of 3 o ' clock to the position of 9 o ' clock to the position of 6 o ' clock.
6. A positive pressure anti-blocking rotary switch according to claim 2 or 3 or 4 or 5, wherein: the inner wall of one end of the protective tube, which is close to the protective tube sealing head, is provided with a support bearing for supporting the transmission shaft.
7. A positive pressure anti-blocking rotary switch as claimed in claim 1, wherein: the air supply port is provided with a butt joint thread, and the butt joint thread is screwed with an air supply joint.
8. A positive pressure anti-blocking rotary switch as claimed in claim 1, wherein: the flange head is provided with a fixed external thread, and the fixed external thread is provided with a gasket and a fixed nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321090186.5U CN219916986U (en) | 2023-05-09 | 2023-05-09 | Positive pressure anti-blocking type anti-rotation switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321090186.5U CN219916986U (en) | 2023-05-09 | 2023-05-09 | Positive pressure anti-blocking type anti-rotation switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219916986U true CN219916986U (en) | 2023-10-27 |
Family
ID=88433548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321090186.5U Active CN219916986U (en) | 2023-05-09 | 2023-05-09 | Positive pressure anti-blocking type anti-rotation switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219916986U (en) |
-
2023
- 2023-05-09 CN CN202321090186.5U patent/CN219916986U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |