CN216957881U - Air duct switch with reed switch - Google Patents
Air duct switch with reed switch Download PDFInfo
- Publication number
- CN216957881U CN216957881U CN202220796839.0U CN202220796839U CN216957881U CN 216957881 U CN216957881 U CN 216957881U CN 202220796839 U CN202220796839 U CN 202220796839U CN 216957881 U CN216957881 U CN 216957881U
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- air duct
- reed
- switch
- air
- pendulum
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- 235000014676 Phragmites communis Nutrition 0.000 title claims abstract description 105
- 230000000670 limiting effect Effects 0.000 claims abstract description 14
- 239000011521 glass Substances 0.000 claims description 12
- 230000017525 heat dissipation Effects 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 244000089486 Phragmites australis subsp australis Species 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 5
- 244000273256 Phragmites communis Species 0.000 description 9
- 238000009423 ventilation Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 150000002739 metals Chemical class 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
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- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
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Abstract
The utility model discloses an air duct switch with a reed pipe. The fixing piece and the air duct frame are fixedly connected through a bolt, the control piece is located on the fixing piece, the hanging piece is located at the top of the fixing piece and connected with the fixing piece through a bolt, the control piece further comprises a shell, a reed pipe and a magnet, the reed pipe is arranged inside the shell, the magnet is fixedly connected with the air pendulum, the fixing piece further comprises a mounting plate and a limiting plate, the mounting plate is of an N-shaped structure, the limiting plate is fixed at the bottom of the mounting plate, and the limiting plate limits the maximum swing angle of the air duct frame. The air duct switch is a non-contact switch with simple structure and strong reliability, replaces the original traditional switch, and thoroughly solves the problem that the air duct detection switch is easy to damage.
Description
Technical Field
The utility model relates to a monitoring technology of underground coal mine ventilation equipment, in particular to an air duct switch with a reed switch.
Background
In the process of tunneling coal mines and other tunnels, air needs to be supplied into the tunnels (ventilation), natural or circulating ventilation is infeasible because the tunnels are not communicated, a common method is to supply air into the tunnels by using an air duct (a cylindrical ventilation channel made of industrial canvas), the air duct is likely to break, leak air, lack of air volume and the like in normal use, the lack of air supplied to a working face can cause many problems of safety and the like, and the detection of whether the air duct is provided with air or not and whether the air volume is sufficient is a necessary means for tunneling the tunnels. Patent No. CN202021240098.5 discloses an air duct switch sensor installation gallows and air duct switch sensor, this file has solved air duct switch sensor installation gallows and has been not suitable for the diameter variation in size's air duct, the poor technical problem of adaptability, but the air duct frame in this file is the contact response with the sensor.
Because the tunnel boring machine is used in a tunnel boring environment, the environment is very severe, and the requirements on water resistance, dust resistance and the like are very high. The existing switch solves the problems of water resistance, dust prevention and the like, the durability of the existing switch is reduced, when an air duct supplies air, the instant tension is very large, and the situations that an air duct frame opens rapidly, and the switch is broken and broken frequently occur.
In view of this, it is a current challenge to be able to provide a low cost solution that is both waterproof and dustproof, small and durable, and non-contact sensing.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides the air duct switch with the reed pipe, which utilizes the magnetic control characteristic of the reed pipe to overcome the defect that the original air duct frame switch is easy to damage, and has simple structure, durability, reliability and low manufacturing cost.
The technical scheme of the utility model is realized as follows:
a wind tube switch with a reed switch is characterized by comprising,
the fixing piece comprises a mounting plate and a limiting plate, and the limiting plate is fixed at the bottom of the mounting plate;
the air duct frame is connected with the fixing piece, the air duct frame further comprises a mounting frame and an air pendulum, the mounting frame is connected with the fixing piece, and the air pendulum is rotatably connected to the mounting frame;
the control piece is connected with the fixing piece, the control piece further comprises a shell, a reed pipe and a magnet, the reed pipe is arranged in the shell, the magnet is fixedly connected with the wind pendulum, and the reed pipe comprises a first magnetic reed and a second magnetic reed;
a suspension member to which the anchor member is connected, wherein,
the limiting plate limits the maximum swing angle of the air duct frame, the air duct frame controls the reed pipe to be in an open state, the magnet moves towards the direction close to the reed pipe under the open state of the air duct frame, the first magnetic reed is connected with the second magnetic reed, the magnet moves towards the direction far away from the reed pipe under the closed state of the air duct frame, and the first magnetic reed is disconnected with the second magnetic reed.
In the air duct switch, the control piece further comprises a screw nut and a lead screw capable of adjusting the distance between the magnet and the reed pipe, the lead screw is in threaded fit with the screw nut, the screw nut is fixedly connected with the air pendulum, and the magnet is fixed on the lead screw.
In the air duct switch, the reed pipe further comprises a glass pipe, the first magnetic reed and the second magnetic reed are sealed in the glass pipe, a gap is formed between the two magnetic reeds, and the interior of the glass pipe is in a vacuum state.
In the air duct switch, the air pendulum is composed of an L-shaped plate and an arc-shaped surface, and the gravity center of the air pendulum is far away from the rotating shaft of the air pendulum.
In the air duct switch, the L-shaped plate is provided with an arc surface, and the arc surface is contacted with the limit plate when the air duct frame is in an open state.
In the air duct switch, the shell is also provided with a heat dissipation hole, the heat dissipation hole is horizontally distributed on two sides of the shell in a transverse direction, and the heat dissipation hole is communicated with the inside of the shell.
In the air duct switch, the mounting plate is further provided with a through groove, and the distance between the through groove and the upper end face of the mounting plate is smaller than the distance between the through groove and the lower end face of the mounting plate.
In the air duct switch, the suspension part is in an annular structure, and the lower end of the suspension part is tightly fixed by a bolt.
The air duct switch has the following beneficial effects: the air duct switch is a non-contact switch with simple structure and strong reliability, replaces the original traditional switch, and thoroughly solves the problem that the air duct detection switch is easy to damage. A plurality of dry reed pipes are arranged in a control piece in the air duct switch and are connected in parallel, so that the detection error in actual use can be reduced. The air duct switch is also provided with an adjusting component which can adjust the distance between the magnet and the reed pipe and adjust the induction sensitivity of the reed pipe. The heat dissipation holes are formed in the two sides of the shell of the air duct switch, so that the heat inside the air duct switch can be effectively discharged, and the phenomenon that the magnetic reed in the reed pipe loses elasticity due to overheating is prevented.
Drawings
Fig. 1 is a schematic structural diagram of a closed state of an air duct switch according to the present invention;
FIG. 2 is a schematic structural diagram of the open state of the air duct switch according to the present invention;
FIG. 3 is a schematic view of a part of the structure of the air duct switch of the present invention, mainly showing the adjusting assembly;
FIG. 4 is a partial cross-sectional view of the air duct switch control of the present invention;
FIG. 5 is a partial cross-sectional view of a reed switch in the control of the present invention;
FIG. 6 is a schematic diagram of the principle analysis of the tongue tube of the present invention, mainly showing the disconnected state of the tongue tube;
fig. 7 is a schematic diagram of principle analysis of the reed switch of the present invention, which mainly shows the conducting state of the reed switch.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 to 5, the air duct switch of the present invention includes a fixing member 1, an air duct frame 2, a control member 3, and a hanging member 4. The fixing piece 1 is fixedly connected with the air duct frame 2 through bolts, and the control piece 3 is positioned on the fixing piece 1. The hanging member 4 is positioned on top of the fixed member 1, and the hanging member 4 is connected to the fixed member 1 by a bolt.
The fixing member 1 is mainly composed of a mounting plate 11, a limiting plate 12 and a through groove 13. The mounting panel 11 is the N type structure, and a pair of limiting plate 12 fixed connection still is equipped with logical groove 13 in the bottom of mounting panel 11 on the mounting panel 11, and should lead to the groove and be the rectangle structure.
As shown in fig. 1 to 2, the air duct frame 2 mainly includes a mounting frame 21, a fixing bolt 22, and an air pendulum 23. The mounting bracket 21 is fixedly connected with the limiting plate 12 on the left side of the mounting plate 11 through a fixing bolt 22. The wind pendulum 23 is rotatably connected to the mounting frame 21, and the wind pendulum 23 is composed of an L-shaped plate and an arc-shaped surface. Under the connection of the L-shaped plate and the arc-shaped surface, the weight of the wind swing rotating shaft is far less than that of the end face. Wherein, the cross connection position of the L-shaped plates is a circular arc surface.
As shown in fig. 4 to 5, the control member 3 includes a housing 31, a heat dissipation hole 32, a circuit board 33, a reed pipe 34, a lead 35, a nut 36, a lead screw 37, and a magnet 38. The housing 31 is fixedly connected with the mounting plate 11 through bolts, and heat dissipation holes 32 are distributed and arranged on two sides of the housing 31. The circuit board 33 is fixedly attached to the inside of the housing 31. In order to enhance the sensitivity of the control member, the circuit on the circuit board 33 is connected with a plurality of reed switches 34, that is, one of the reed switches is turned on, and then the control member is turned on.
The reed switch 34 is mainly composed of a glass tube 341, a first magnetic reed 342, and a second magnetic reed 343. The first magnetic reed 342 and the second magnetic reed 343 are usually made of two metals, iron and nickel, and are hermetically sealed in the glass tube 341, and the two magnetic reeds are overlapped and spaced by a small gap. The contacts on the two magnetic reed pieces are also plated with hard metal layers, usually rhodium and ruthenium, and the hard metal layers greatly improve the switching times and the service life of the reed switch. In order to improve the performance of the reed switch, the inside of the glass tube 341 may be made in a vacuum state (or the inside of the glass tube 341 may be filled with a high-purity inert gas). The magnetic reed is sealed in a vacuum state and does not contact with the external environment, so that the oxidation and carbonization of the contact caused by the spark of the contact in the opening and closing processes of the contact are greatly reduced. And prevents the erosion of foreign matters such as external steam and dust to the contact points. The circuit board 33 leads out the magnetic reeds at two ends of the reed pipe, the circuit board 33 is connected with the lead 35, and the lead 35 is positioned in the through groove 13.
As shown in FIG. 3, the nut 36 is fixedly connected to the wind pendulum 23, the screw 37 is tightly matched with the nut through threads, and the magnet 38 is fixedly connected to the screw 37.
When the magnetic reed is not operated, the two magnetic reeds of the reed pipe are not contacted. The mounting frame 21 and the arc-shaped surface of the wind pendulum 23 clamp the wind cylinder. As shown in fig. 2, when the ventilator works normally, the wind duct frame 2 detects the wind, the wind duct frame 2 is opened under the action of the wind, the wind pendulum 23 rotates along the mounting frame 21, and the magnet 38 on the wind pendulum 23 is close to the reed pipe 34. As shown in fig. 6 to 7, when the magnetic field of the magnet 38 passes through, the external magnetic field causes the end points of the two magnetic reeds to generate different magnetic properties, and when the magnetic force exceeds the elastic force of the reeds, the two magnetic reeds attract and conduct the circuit, indicating that the air volume in the air duct is normal.
When the ventilator stops running or there is no wind in the wind tunnel for some reason, the wind pendulum 23 is folded under the action of gravity and returns to the original position, and the magnet 38 is far away from the reed pipe 34. After the magnetic field is weakened or disappears, the magnetic reed is released due to the elasticity of the magnetic reed, and the contact surfaces are separated, so that a circuit is disconnected, and a signal is sent out to the well.
When the magnet 38 approaches the reed pipe 34, the two magnetic reeds are magnetized to have different polarities that attract each other, and when the magnetic field is large enough, the two magnetic reeds can generate enough attraction force to contact each other. The magnetic reed is tempered to eliminate remanence, so that the magnetic field on the magnetic reed disappears when the magnetic field is removed. The most obvious deformation caused by the ventilation condition change of the air duct is on the arc surface of the air duct frame 2. When no wind exists, the air duct frame is shriveled and drooped to be in an I shape; when in ventilation, the air duct frame is expanded to be O-shaped. In actual use, the posture change of the plane where the arc-shaped surface of the air duct frame is located is detected, and the larger angle change is extracted and used as the main discrimination quantity.
Because the air duct switch is arranged under a coal mine or in a roadway for a long time, the air duct frame 2 is difficult to act due to corrosion and further fails. The wind pendulum 23 is composed of an L-shaped plate and an arc-shaped surface, and the weight of the rotating shaft of the wind pendulum 23 is far smaller than that of the end face by the structure, namely the wind pendulum can return by utilizing gravity better. Meanwhile, the air duct switch is prevented from being aged after being used in a long-term severe environment, and the air swing cannot return at the first time, so that the switch has errors. As shown in fig. 1, a limit plate 12 on the right side of the mounting plate 11 can limit the maximum rotation angle of the wind pendulum 23. In the air supply process of the air duct, the situation that the switch shell is broken or broken due to the fact that the tension is overlarge instantly when the air swings is prevented. The arc surface at the cross connection of the L-shaped plates on the wind pendulum 23 can be used for buffering to prevent the wind pendulum from generating irreversible deformation after colliding with the limiting plate.
The reed 342 in the reed switch 34 is light and short, and has a mechanical structure and a natural frequency, so that the reed switch cannot be used in a case where the natural frequency is higher than or equal to the natural frequency. When the reed switch is subjected to a collision, its electrical characteristics (the state of activation, release, etc.) may be changed. And the glass tube 341 in the reed switch is fragile and has poor resistance to impact and vibration. The shell 31 plays roles of water prevention, dust prevention, vibration prevention and the like for the reed pipe 34.
In the existing reed switch, the magnetic reed and the contact are quite small, and when the field intensity of a magnetic field is too large, the magnetic reed loses elasticity due to overheating or the contact generates jitter. The heat dissipation holes 32 are distributed on two sides of the housing 31, and can effectively discharge the temperature inside the housing, thereby prolonging the service life of the reed switch. And the influence of the thermal expansion characteristics of the metal magnetic reed and the glass tube of the reed switch is also prevented.
As shown in fig. 3, the magnet 38 is fixed on the screw rod 37, and since the nut 36 is in a fixed state, the distance between the magnet 38 and the wind pendulum can be adjusted by rotating the screw rod 37, and the distance between the magnet 38 and the control member 3 can also be changed. The purpose of the distance adjustment is, above all, to prevent a collision between the magnet 38 and the housing 31 on the control element 3. Secondly, the distance between the magnet 38 and the reed switch 34 is adjusted, the trigger sensitivity of the reed switch can be changed according to the air quantity of the air duct, the situation that the air quantity of the air duct is too small, the swing distance of the magnet does not reach the trigger distance of the reed switch is avoided, and the trigger sensitivity of the reed switch is reduced.
The hanging part 4 is in a ring structure, the hanging part 4 is rotatably connected with the mounting plate 11, and a nut is arranged at the lower end of the hanging part 4 and is tightly attached to the mounting plate 11, so that the hanging part 4 is fixedly connected with the mounting plate 11. The shackle on the hanging piece 4 is convenient to connect in the severe environment of coal mine and roadway excavation. And the dry reed pipe is arranged at the position 50-80m away from the working surface in order to avoid the influence of blasting vibration on the dry reed pipe when the dry reed pipe is arranged at the underground tunneling working surface. The suspension part 4 can be suitable for different terrain structures, and has the advantages of simple structure, lower cost and wide application prospect.
The air duct switches of the present invention are mainly characterized by small size and light weight, which makes them easy to install and unobtrusive. Compared with the existing mechanical switch, the reed switch has small volume, so that the reed switch does not need to be driven by a complex mechanical mechanism, the metal fatigue phenomenon can not occur, and the almost infinite service life is ensured. And can be installed in a limited space, and is very suitable for miniature equipment. The air duct switch is a magnetic control switch, and whether air is exhausted from the air duct can be detected without detecting with the switch. Compared with the existing electromagnetic relay, the magnetic reed in the reed switch is thin and short, has higher natural frequency, improves the on-off speed of the contact, has 5-10 times higher switching speed than the common electromagnetic relay, and greatly improves the detection performance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A wind tube switch with a reed switch is characterized by comprising,
the fixing piece comprises a mounting plate and a limiting plate, and the limiting plate is fixed at the bottom of the mounting plate;
the air duct frame is connected with the fixing piece, the air duct frame further comprises a mounting frame and an air pendulum, the mounting frame is connected with the fixing piece, and the air pendulum is rotatably connected to the mounting frame;
the control piece is connected with the fixing piece, the control piece further comprises a shell, a reed pipe and a magnet, the reed pipe is arranged in the shell, the magnet is fixedly connected with the wind pendulum, and the reed pipe comprises a first magnetic reed and a second magnetic reed;
a suspension member to which the anchor member is connected, wherein,
the limiting plate limits the maximum swing angle of the air duct frame, the air duct frame controls the reed pipe to be in an open state, the magnet moves towards the direction close to the reed pipe under the open state of the air duct frame, the first magnetic reed is connected with the second magnetic reed, the magnet moves towards the direction far away from the reed pipe under the closed state of the air duct frame, and the first magnetic reed is disconnected with the second magnetic reed.
2. The air duct switch according to claim 1, wherein the control member further comprises a screw nut, a lead screw capable of adjusting the distance between the magnet and the reed pipe, the lead screw is in threaded fit with the screw nut, the screw nut is fixedly connected with the air pendulum, and the magnet is fixed on the lead screw.
3. The air duct switch according to claim 1, wherein the reed tube further comprises a glass tube, the first magnetic reed and the second magnetic reed are sealed in the glass tube, a gap is formed between the two magnetic reeds, and the inside of the glass tube is in a vacuum state.
4. The air duct switch according to claim 1, wherein the air pendulum is composed of an L-shaped plate and an arc-shaped surface, and the center of gravity of the air pendulum is far away from the rotating shaft of the air pendulum.
5. The air duct switch according to claim 4, wherein the L-shaped plate has an arc surface, and the arc surface contacts the limit plate when the air duct frame is in the open state.
6. The air duct switch according to claim 1, wherein the casing further has a heat dissipation hole, the heat dissipation hole is horizontally distributed on two sides of the casing, and the heat dissipation hole is communicated with the inside of the casing.
7. The air duct switch according to claim 1, wherein the mounting plate further comprises a through slot, and the through slot is spaced from the upper end surface of the mounting plate by a distance smaller than the distance from the lower end surface of the mounting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220796839.0U CN216957881U (en) | 2022-04-08 | 2022-04-08 | Air duct switch with reed switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220796839.0U CN216957881U (en) | 2022-04-08 | 2022-04-08 | Air duct switch with reed switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216957881U true CN216957881U (en) | 2022-07-12 |
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ID=82300131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220796839.0U Expired - Fee Related CN216957881U (en) | 2022-04-08 | 2022-04-08 | Air duct switch with reed switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216957881U (en) |
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2022
- 2022-04-08 CN CN202220796839.0U patent/CN216957881U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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Granted publication date: 20220712 |