CN111102995B - Air door position detection device for drying fan - Google Patents
Air door position detection device for drying fan Download PDFInfo
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- CN111102995B CN111102995B CN201911367422.1A CN201911367422A CN111102995B CN 111102995 B CN111102995 B CN 111102995B CN 201911367422 A CN201911367422 A CN 201911367422A CN 111102995 B CN111102995 B CN 111102995B
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- 238000001514 detection method Methods 0.000 title claims abstract description 73
- 238000001035 drying Methods 0.000 title claims abstract description 37
- 230000006835 compression Effects 0.000 claims abstract description 23
- 238000007906 compression Methods 0.000 claims abstract description 23
- 238000009423 ventilation Methods 0.000 claims description 15
- 238000010926 purge Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Drying Of Solid Materials (AREA)
Abstract
本发明提供了一种用于干燥风机的风门位置检测装置，属于位置检测技术领域，包括检测筒、接近开关、驱动件、触发块、夹持件和压缩弹簧。检测筒的上壁开设有控制孔。接近开关固设于检测筒内的下端。驱动件的下端滑动设于检测筒内，上端滑动穿透检测筒的上壁且漏出端用于与风门固定连接。触发块滑动设于接近开关与驱动件之间。两个夹持件相对间隔设置，夹持件的中部绕水平轴线与驱动件铰接。压缩弹簧设于两个夹持件之间的上端。两个夹持件的下端向下滑动实现夹紧触发块，两个夹持件向上滑动，实现两个夹持件的下端松开触发块。本发明提供的用于干燥风机的风门位置检测装置，解决了风门开启以及风门开启到最大位置的信号无法采集的问题。
The present invention provides a damper position detection device for a drying fan, which belongs to the technical field of position detection and includes a detection tube, a proximity switch, a driving member, a trigger block, a clamping member and a compression spring. A control hole is provided on the upper wall of the detection tube. The proximity switch is fixed at the lower end in the detection tube. The lower end of the driving member is slidably arranged in the detection tube, and the upper end slides through the upper wall of the detection tube and the leakage end is used to be fixedly connected to the damper. The trigger block is slidably arranged between the proximity switch and the driving member. Two clamping members are arranged at a relative interval, and the middle part of the clamping member is hinged to the driving member around a horizontal axis. The compression spring is arranged at the upper end between the two clamping members. The lower ends of the two clamping members slide downward to clamp the trigger block, and the two clamping members slide upward to release the trigger block at the lower ends of the two clamping members. The damper position detection device for a drying fan provided by the present invention solves the problem that the signal of the damper opening and the damper opening to the maximum position cannot be collected.
Description
Technical Field
The invention belongs to the technical field of position detection, and particularly relates to a throttle position detection device for a drying fan.
Background
The drying fan of the cold calender is provided with an air door, and the air blown out by the air door sweeps and cools the finishing liquid and the surface water on the surface of the strip steel. According to the process requirement and the protection of the equipment limit action, the signals of opening the air door and the signals of opening the air door to the maximum position are required to be collected in the program, and because tension roller equipment, clamping plates, hydraulic pipelines and the like are also arranged at the position where the air door is located in a crossing manner, the actions of the air door cannot be led out in a transmission manner and the like, so that the signals of opening the air door and the signals of opening the air door to the maximum position cannot be collected in the prior art.
Disclosure of Invention
The invention aims to provide a throttle position detection device for a drying fan, which aims to solve the problem that a throttle is opened and a signal of the maximum position of the throttle is opened cannot be acquired.
In order to achieve the aim, the technical scheme adopted by the invention is that the air door position detection device for the drying fan comprises a detection cylinder, a proximity switch, a driving piece, a trigger block, a clamping piece and a compression spring. The detection cylinder is used for being fixedly arranged relative to an air door of the drying fan, the axial lead of the detection cylinder is arranged vertically, and a control hole with a trapezoid longitudinal section and gradually smaller outwards is formed in the upper wall of the detection cylinder. The proximity switch is fixedly arranged at the lower end in the detection cylinder. The lower extreme of driving piece slides and locates in the detection section of thick bamboo, the upper end slides and pierces through the upper wall of detection section of thick bamboo and spill the end and be used for with air door fixed connection. The trigger block is arranged in the detection cylinder in a sliding manner and is positioned between the proximity switch and the driving piece. The quantity of clamping pieces is two and slides and locate in the detection section of thick bamboo, two the relative interval setting of clamping piece, the middle part of clamping piece around horizontal axis with the driving piece articulates. The compression spring is arranged at the upper end between the two clamping pieces, and two ends of the compression spring are used for outwards extruding the upper ends of the two clamping pieces. The lower ends of the clamping pieces slide downwards along with the driving pieces to squeeze the trigger blocks, so that the lower ends of the two clamping pieces rotate and then clamp the trigger blocks, and the upper ends of the clamping pieces slide upwards along with the driving pieces to penetrate into the control holes, so that the lower ends of the two clamping pieces rotate and then release the trigger blocks.
According to another embodiment of the application, the opposite sides of the clamping piece are fixedly provided with protruding clamping parts, the lower ends of the two clamping parts are respectively provided with a first chamfer, the two first chamfers are oppositely arranged, the upper end of the trigger block is fixedly provided with a vertically arranged clamping column, the space between the clamping column and the two first chamfers is vertically aligned, and the clamping column is used for being clamped by the inner side surfaces of the two clamping parts.
As another embodiment of the present application, a first limiting portion protruding outwards along a radial direction of the clamping post is fixedly arranged on an upper end surface of the clamping post, and the first limiting portion is used for limiting an axial direction of the clamping portion when the two clamping portions clamp the clamping post.
In another embodiment of the present application, a driving post is fixed at the upper end of the inner side of the clamping member, a second limiting portion protruding outwards along the radial direction of the driving post is fixed at the middle of the driving post, the compression springs are sleeved on the two driving posts, and two ends of the compression springs respectively squeeze one of the second limiting portions.
In another embodiment of the present application, the driving member includes a driving block disposed in the detection cylinder and a driving rod penetrating through the upper wall, the driving block is fixedly connected to the driving rod, and a plurality of connection holes for fixedly connecting with the damper are disposed at a leakage end of the driving rod along an axial direction of the driving rod.
As another embodiment of the application, the bottom end in the detection cylinder is fixedly provided with a mounting piece, the mounting piece is provided with a fixing hole which is vertically arranged, and the inside of the fixing hole is used for fixing the proximity switch.
As another embodiment of the application, the lower wall of the detection cylinder is provided with an air inlet which is communicated with a purge air source, a ventilation channel is arranged in the detection cylinder, one end of the ventilation channel is communicated with the control hole, and the other end of the ventilation channel is communicated with the air inlet after sequentially passing through the corresponding end of the driving piece, the triggering block and the mounting piece.
As another embodiment of the application, the mounting piece comprises a first end cover, a first sleeving ring, a fixing plate and a second sleeving ring, wherein the first end cover, the first sleeving ring and the fixing plate are arranged in a split mode from top to bottom in sequence, the second sleeving ring is coaxial with the detection cylinder, and the middle part of the proximity switch is fixed on the fixing plate.
In another embodiment of the present application, a lower end of the inner surface of the detection cylinder is provided with a limiting groove recessed inward along a radial direction of the detection cylinder, and the mounting piece is matched and attached with the limiting groove.
As another embodiment of the present application, the lower wall of the detection cylinder is separately arranged with the cylinder body of the detection cylinder, the bottom surface of the lower wall is abutted with a supporting rod, one end of the supporting rod is hinged with the cylinder body around a horizontal axis, and the other end of the supporting rod is connected with the cylinder body by means of a snap lock.
Compared with the prior art, the air door position detection device for the drying fan has the advantages that the driving piece is fixedly connected with the air door, when the air door is closed, the lower ends of the clamping pieces slide downwards along with the driving piece to press the trigger block, the lower ends of the two clamping pieces rotate and clamp the trigger block under the resilience force of the compression springs, when the air door is opened, the two clamping pieces clamp the trigger block to slide upwards, the proximity switch sends out a signal, when the upper ends of the clamping pieces slide upwards along with the driving piece to penetrate into the control hole, the upper ends of the two clamping pieces rotate inwards due to the fact that the longitudinal section of the control hole is trapezoid and gradually decreases outwards, finally, the lower ends of the two clamping pieces rotate outwards and then release the trigger block, the trigger block slides downwards under the action of gravity, and when the air door is opened to the maximum position, the proximity switch sends out a signal, so that the air door is opened and the signal of the maximum position cannot be acquired is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an axial structure of a damper position detecting device for a drying fan according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structural diagram of a damper position detecting device for a drying fan according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of the portion A in FIG. 2;
fig. 4 is a schematic diagram of an axial measurement structure of a detection cylinder in a damper position detection device for a drying fan according to an embodiment of the present invention after a lower wall is removed;
Fig. 5 is a schematic diagram of an axial structure of a lower wall in a damper position detecting device for a drying fan according to an embodiment of the present invention;
Fig. 6 is a schematic diagram of an axial structure of a driving block in a damper position detecting device for a drying fan according to an embodiment of the present invention;
fig. 7 is a schematic diagram of an axial structure of a driving rod in a damper position detecting device for a drying fan according to an embodiment of the present invention.
In the figure, 1, a detection cylinder; 11, upper wall, 111, control hole, 12, lower wall, 121, air inlet, 122, wiring hole, 123, third sleeve ring, 13, cylinder, 131, limit groove, 132, slideway, 2, proximity switch, 21, nut, 3, driving piece, 31, driving block, 311, first mounting hole, 312, second mounting hole, 32, driving rod, 321, connecting hole, 4, trigger block, 41, support column, 411, clamping column, 412, first limit part, 42, sleeve block, 43, second chamfer, 5, clamping piece, 51, clamping part, 511, first chamfer, 52, driving column, 521, second limit part, 6, compression spring, 7, mounting piece, 701, fixing hole, 704, air hole, 71, first end cover, 72, first sleeve ring, 73, fixing plate, 74, second sleeve ring, 8, rod, 81, connecting groove, 9, overlap lock, 10, connecting plate.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 4, a description will now be given of a damper position detecting device for a drying fan according to the present invention. The throttle position detection device for the drying fan comprises a detection cylinder 1, a proximity switch 2, a driving piece 3, a trigger block 4, a clamping piece 5 and a compression spring 6. The detection cylinder 1 is used for being fixedly arranged relative to an air door of the drying fan, the axial lead of the detection cylinder 1 is vertically arranged, and a control hole 111 with a trapezoid longitudinal section and gradually smaller outwards is formed in the upper wall 11 of the detection cylinder 1. The proximity switch 2 is fixedly arranged at the lower end in the detection cylinder 1. The lower end of the driving piece 3 is slidably arranged in the detection cylinder 1, the upper end of the driving piece penetrates through the upper wall 11 of the detection cylinder 1 in a sliding manner, and the leakage end is fixedly connected with the air door. The trigger block 4 is slidably disposed in the detection cylinder 1 and located between the proximity switch 2 and the driving member 3. The number of the clamping pieces 5 is two, the two clamping pieces 5 are arranged in the detection barrel 1 in a sliding manner, the two clamping pieces 5 are arranged at intervals relatively, and the middle part of the clamping piece 5 is hinged with the driving piece 3 around the horizontal axis. The compression spring 6 is arranged at the upper end between the two clamping pieces 5, and two ends of the compression spring 6 are used for outwards extruding the upper ends of the two clamping pieces 5. The lower extreme of clamping piece 5 is along with drive piece 3 downwardly sliding extrusion trigger piece 4, and the tight trigger piece 4 of back is rotated to the lower extreme of realizing two clamping pieces 5, and the upper end of clamping piece 5 upwards slides along with drive piece 3 and penetrates control hole 111, loosens trigger piece 4 after realizing the lower extreme of two clamping pieces 5 and rotate.
In this embodiment, the detection cylinder 1 may be fixedly connected to a connection board 10, and fixedly connected to a wall body or the like through the connection board 10.
Compared with the prior art, the air door position detection device for the drying fan provided by the invention has the advantages that the driving piece 3 is fixedly connected with the air door, so that when the air door is closed, the lower ends of the clamping pieces 5 slide downwards along with the driving piece 3 to press the trigger block 4, the lower ends of the two clamping pieces 5 rotate and then clamp the trigger block 4 under the resilience force of the compression spring 6, when the air door is opened, the two clamping pieces 5 clamp the trigger block 4 to slide upwards, the proximity switch 2 sends out a signal, when the upper ends of the clamping pieces 5 slide upwards along with the driving piece 3 to penetrate into the control hole 111, the upper ends of the two clamping pieces 5 rotate inwards due to the fact that the longitudinal section of the control hole 111 is trapezoidal and gradually decreases outwards, finally, the lower ends of the two clamping pieces 5 rotate outwards and then release the trigger block 4, the trigger block 4 slides downwards under the action of gravity, and when the air door is opened to the maximum position, the proximity switch 2 sends out a signal, and the problem that the air door is opened and the signal of the maximum position cannot be acquired is solved.
As a specific embodiment of the damper position detection device for a drying fan provided by the invention, referring to fig. 2 to 4, in order to realize that when the lower ends of the clamping pieces 5 slide downwards along with the driving piece 3 to squeeze the trigger block 4, the lower ends of the two clamping pieces 5 rotate and then clamp the trigger block 4, the opposite sides of the clamping pieces 5 are fixedly provided with protruded clamping portions 51, the lower ends of the two clamping portions 51 are respectively provided with a first chamfer 511, the two first chamfers 511 are oppositely arranged, the upper ends of the trigger block 4 are fixedly provided with vertically arranged clamping columns 411, and the clamping columns 411 are used for being clamped by the inner side surfaces of the two clamping portions 51 in an up-down alignment manner. The clamping column 411 is configured to spread the two clamping portions 51 by pressing the two first chamfers 511, and when the clamping column 411 is inserted between the two clamping portions 51, the lower ends of the two clamping portions 51 clamp the clamping column 411 inward since the compression springs 6 compress the upper ends of the two clamping members 5 to rotate outward. I.e. to clamp the trigger block 4 after rotation of the lower ends of the two clamping members 5. In this embodiment, two slides 132 may also be provided on the inner surface of the cartridge 1. The two slide ways 132 are respectively used for sliding one of the clamping pieces 5, so that when the two clamping pieces 5 slide upwards, the upper ends of the two clamping pieces 5 can accurately penetrate into the control hole 111, and when the two clamping pieces 5 slide downwards, the lower ends of the two clamping pieces 5 accurately clamp the clamping column 411.
As a specific embodiment of the damper position detection device for a drying fan provided by the invention, referring to fig. 2, a first limiting portion 412 protruding outwards along the radial direction of the clamping post 411 is fixedly arranged on the upper end surface of the clamping post 411, and the first limiting portion 412 is used for realizing axial limiting of the clamping portion 51 when the two clamping portions 51 clamp the clamping post 411, so that the reliability of the trigger block 4 sliding upwards along with the clamping piece 5 can be increased, that is, the reliability of the signal emission of the proximity switch 2 is increased. The first limiting portion 412 is used for expanding the two clamping portions 51, and when the two clamping portions 51 move downwards to the position of the clamping column 411, the two clamping portions 51 rotate inwards to clamp the clamping column 411.
As a specific embodiment of the damper position detection device for a drying fan provided by the invention, referring to fig. 3, in order to achieve that two ends of the compression spring 6 press the upper ends of the two clamping pieces 5 outwards, the upper ends of the inner sides of the clamping pieces 5 are fixedly provided with driving columns 52 horizontally, the middle part of the driving columns 52 is fixedly provided with a second limiting part 521 protruding outwards along the radial direction of the driving columns 52, the compression spring 6 is sleeved on the two driving columns 52, and two ends of the compression spring 6 respectively press one second limiting part 521.
As a specific embodiment of the device for detecting the position of the air door of the drying fan provided by the invention, referring to fig. 2, 6 and 7, the driving member 3 includes a driving block 31 disposed in the detecting cylinder 1 and a driving rod 32 penetrating through the upper wall 11, the driving block 31 is fixedly connected with the driving rod 32, and a plurality of connecting holes 321 for fixedly connecting with the air door are disposed at the leakage end of the driving rod 32 along the axial direction of the driving rod 32. The structure is simple and easy to process, and the arrangement of the plurality of connecting holes 321 can enable the detection device to be applicable to air doors of different dryers, so that the application range is wider. In this embodiment, two first mounting holes 311 penetrating radially outwards can be formed in the end face of the driving block 31, the middle parts of the two clamping pieces 5 are respectively located in one first mounting hole 311, a horizontal second mounting hole 312 can be formed in the middle part of the driving block 31, two ends of the second mounting hole 312 are respectively communicated with one first mounting hole 311, the middle part of the compression spring 6 is placed in the second mounting hole 312, when the triggering block 4 is clamped by the two clamping pieces 5, the bottom surface of the driving block 31 is used for carrying out butt limiting on the top surface of the triggering block 4, and the lower end of the triggering block 4 is prevented from being damaged by the two clamping pieces 5.
As a specific embodiment of the air door position detection device for a drying fan provided by the invention, referring to fig. 2, a mounting piece 7 is fixedly arranged at the bottom end in the detection cylinder 1, and a fixing hole 701 is vertically arranged in the mounting piece 7, wherein the fixing hole 701 is used for fixing the proximity switch 2. Providing the proximity switch 2 in the fixing hole 701 can prevent the proximity switch 2 from being damaged due to the pressing or collision of the trigger block 4. In this embodiment, in order to further protect the proximity switch 2, the trigger block 4 includes a middle support column 41 made of metal and a sleeve block 42 made of nylon and sleeved outside the support column 41, the support column 41 is fixedly connected with the sleeve block 42, the upper end of the support column 41 extends out of the sleeve block 42, a section of the support column 41 above the sleeve block 42 is used for being set as a clamping column 411, and the lower surface of the support column 41 is used for being in contact with the upper surface of the mounting piece 7, so that the use of the trigger block 4 is not affected, the weight of the trigger block 4 is reduced, and the influence of vibration of the trigger block 4, which is caused by downward sliding collision of the mounting piece 7, on the proximity switch 2 is reduced.
As a specific embodiment of the damper position detecting device for a drying fan provided by the invention, please refer to fig. 1,2 and 5, the ambient temperature near the detecting cylinder 1 is high, which affects the proximity switch 2, and the iron powder and dust deposit enter the detecting cylinder 1 from the control hole 111 above, which affects the use of the device, so that frequent wiping or replacement of parts in the detecting cylinder 1 is required, the operation place for these operations is high, the space is small, and the risk coefficient is large. In order to avoid the influence, the lower wall 12 of the detection cylinder 1 is provided with an air inlet 121, the air inlet 121 is communicated with a purge air source, a ventilation channel is arranged in the detection cylinder 1, one end of the ventilation channel is communicated with the control hole 111, and the other end of the ventilation channel sequentially passes through the corresponding end of the driving piece 3, the triggering block 4 and the mounting piece 7 and then is communicated with the air inlet 121. The high-pressure gas generated by the purging gas source enters the detection cylinder 1 from the air inlet 121 and is discharged from the control hole 111 after passing through the ventilation channel, so that iron powder and dust can be prevented from entering the detection cylinder 1 from the control hole 111 above, and meanwhile, the temperature in the detection cylinder 1 can be reduced by the ventilation channel. In this embodiment, the purge air source may be an air compressor, the ventilation channel includes a plurality of ventilation holes 704 formed on the mounting member 7 and the trigger block 4 for ventilation, and two ends of the trigger block 4 are provided with second chamfer angles 43, and the second chamfer angles 43 at the lower end are used for leaking the ventilation holes 704 of the mounting member 7. A wiring hole 122 may be further formed in the lower wall 12 of the detection cylinder 1, and an electrical connection wire of the proximity switch 2 may be hermetically protruded from the wiring hole 122.
As a specific embodiment of the damper position detecting device for a drying fan provided by the invention, referring to fig. 2, in order to facilitate installation of the proximity switch 2, the installation member 7 includes a first end cover 71, a first sleeving ring 72 coaxial with the detection cylinder 1, a fixing plate 73 and a second sleeving ring 74 coaxial with the detection cylinder 1, which are sequentially and separately arranged from top to bottom, wherein the middle part of the proximity switch 2 is fixed on the fixing plate 73, the proximity switch 2 is inserted into the fixing hole 701, and the proximity switch 2 is fixedly connected with the fixing plate 73 through two nuts 21 on the proximity switch 2.
As a specific embodiment of the damper position detecting device for a drying fan provided by the invention, referring to fig. 2 and 4, in order to facilitate installation of the mounting member 7, a lower end of an inner surface of the detecting cylinder 1 is provided with a limiting groove 131 recessed inward along a radial direction of the detecting cylinder 1, and the mounting member 7 is matched and attached with the limiting groove 131.
As a specific embodiment of the damper position detecting device for a drying fan provided by the invention, referring to fig. 1 to 2, a lower wall 12 of a detecting cylinder 1 is separately arranged with a cylinder body 13 of the detecting cylinder 1, a bottom surface of the lower wall 12 is abutted with a supporting rod 8, one end of the supporting rod 8 is hinged with the cylinder body 13 around a horizontal axis, and the other end of the supporting rod 8 is connected with the cylinder body 13 by means of a snap lock 9. When the mounting piece 7 needs to be mounted, the connection between the cylinder 13 and the lower wall 12 is disconnected through the snap lock 9 in the first step, then the support rod 8 is rotated downwards and the lower wall 12 is removed, the mounting piece 7 is placed in the limit groove 131 in the second step, then the lower wall 12 is reset, the support rod 8 is rotated upwards to reset in the third step, and finally the cylinder 13 and the lower wall 12 are connected through the snap lock 9. In this embodiment, the upper surface of the lower wall 12 may be fixed with a third sleeving ring 123 coaxial with the detection cylinder 1, the outer surface of the third sleeving ring 123 is attached to the limiting groove 131, and the upper surface of the third sleeving ring 123 is used for supporting the mounting member 7, so that the mounting and positioning of the lower wall 12 can be facilitated. In this embodiment, the snap lock 9 is hinged to the cylinder 13 about a horizontal axis, and the lower surface of the support rod 8 is provided with a connecting groove 81 for connection with the snap lock 9.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. A air door position detection device for drying fan, its characterized in that includes:
The detection cylinder is used for being fixedly arranged relative to an air door of the drying fan, the axial lead of the detection cylinder is vertically arranged, and a control hole with a trapezoid longitudinal section and gradually smaller outwards is formed in the upper wall of the detection cylinder;
The proximity switch is fixedly arranged at the lower end in the detection cylinder;
the lower end of the driving piece is arranged in the detection cylinder in a sliding way, the upper end of the driving piece penetrates through the upper wall of the detection cylinder in a sliding way, and the leakage end of the driving piece is fixedly connected with the air door;
The trigger block is arranged in the detection cylinder in a sliding manner and is positioned between the proximity switch and the driving piece;
The two clamping pieces are arranged in the detection cylinder in a sliding manner, the two clamping pieces are arranged at intervals relatively, the middle part of each clamping piece is hinged with the driving piece around the horizontal axis, and
The compression springs are arranged at the upper ends between the two clamping pieces, and two ends of each compression spring are used for outwards extruding the upper ends of the two clamping pieces;
the lower ends of the clamping pieces slide downwards along with the driving pieces to squeeze the trigger blocks, so that the lower ends of the two clamping pieces rotate and then clamp the trigger blocks, and the upper ends of the clamping pieces slide upwards along with the driving pieces to penetrate into the control holes, so that the lower ends of the two clamping pieces rotate and then release the trigger blocks;
The upper end of the trigger block is fixedly provided with a vertically arranged clamping column, the space between the clamping column and the two first chamfers is aligned vertically, and the clamping column is used for being clamped by the inner side surfaces of the two clamping parts;
The upper end of the inner side of the clamping piece is fixedly provided with a driving column which is horizontally arranged, the middle part of the driving column is fixedly provided with a second limiting part which protrudes outwards along the radial direction of the driving column, the compression spring is sleeved on the two driving columns, and two ends of the compression spring respectively extrude one second limiting part;
when the air door is closed, the lower ends of the clamping pieces slide downwards along with the driving piece to squeeze the trigger blocks, the lower ends of the two clamping pieces rotate and then clamp the trigger blocks under the action of resilience force of the compression springs, when the air door is opened, the two clamping pieces clamp the trigger blocks to slide upwards, the proximity switch sends out a signal, when the upper ends of the clamping pieces slide upwards along with the driving piece to penetrate into the control hole, as the longitudinal section of the control hole is trapezoid and gradually decreases outwards, the upper ends of the two clamping pieces rotate inwards, finally, the lower ends of the two clamping pieces rotate outwards and then release the trigger blocks, the trigger blocks slide downwards under the action of gravity, and when the air door is opened to the maximum position, the proximity switch sends out a signal.
2. The damper position detecting device for a drying fan according to claim 1, wherein a first limiting portion protruding radially outward of the clamping post is fixedly provided on an upper end face of the clamping post, and the first limiting portion is used for limiting axially of the clamping portions when the clamping posts are clamped by the two clamping portions.
3. The damper position detecting device for a drying blower according to claim 1, wherein the driving member includes a driving block provided in the detecting cylinder and a driving rod penetrating the upper wall, the driving block is fixedly connected to the driving rod, and a leakage end of the driving rod is provided with a plurality of connection holes for fixedly connecting with the damper in an axial direction of the driving rod.
4. The damper position detecting device for a drying fan as claimed in claim 1, wherein a mounting member is fixedly provided at a bottom end in the detecting cylinder, the mounting member is provided with a fixing hole vertically provided therein for fixing the proximity switch.
5. The device for detecting the position of a damper of a drying fan according to claim 4, wherein the lower wall of the detecting cylinder is provided with an air inlet, the air inlet is communicated with a purge air source, a ventilation channel is arranged in the detecting cylinder, one end of the ventilation channel is communicated with the control hole, and the other end of the ventilation channel sequentially passes through the corresponding end of the driving piece, the triggering block and the mounting piece and then is communicated with the air inlet.
6. The damper position detecting apparatus for a dry blower according to claim 5, wherein the mounting member includes a first end cap, a first set ring, a fixing plate, and a second set ring, which are disposed separately from top to bottom in this order, coaxial with the detection cylinder, and the middle portion of the proximity switch is fixed to the fixing plate.
7. The damper position detecting device for a drying blower according to claim 5, wherein a lower end of the inner surface of the detecting cylinder has a limit groove recessed inward in a radial direction of the detecting cylinder, and the mounting member is fitted to the limit groove in a matching manner.
8. The damper position detecting device for a drying blower according to claim 7, wherein the lower wall of the detecting cylinder is provided separately from the cylinder body of the detecting cylinder, a support rod is abutted against the bottom surface of the lower wall, one end of the support rod is hinged with the cylinder body around a horizontal axis, and the other end of the support rod is connected with the cylinder body by means of a snap lock.
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| FR2521885A1 (en) * | 1982-02-23 | 1983-08-26 | Altaisky Inst T | Longitudinal rolling equipment - has housing containing pass-forming friction rolls with clamping device slidable by power cylinders mounted on housing |
| FR2638670B1 (en) * | 1988-11-09 | 1990-12-14 | Roudaut Philippe | PNEUMATIC CLIP |
| DE19650799C1 (en) * | 1996-12-06 | 1998-07-02 | Sfs Ind Holding Ag | Nut for receiving or inserting into a fastener head (es) |
| JP6094366B2 (en) * | 2013-02-21 | 2017-03-15 | 豊田合成株式会社 | Damper opening and closing device |
| CN204083478U (en) * | 2014-08-28 | 2015-01-07 | 中国人民解放军第五七二一工厂 | The maximum opening angle detection device of a kind of built-in valve of conduit |
| CN204531755U (en) * | 2015-03-10 | 2015-08-05 | 吉林大学 | The automatically controlled stopping means of a kind of car door |
| CN104879996B (en) * | 2015-05-29 | 2017-05-31 | 海信容声(广东)冰箱有限公司 | A kind of detection position limiting structure of cold storage plant air door |
| CN205556555U (en) * | 2016-04-21 | 2016-09-07 | 唐山钢铁集团有限责任公司 | Coke oven waste gas brace detection device and control circuit thereof |
| CN105819329B (en) * | 2016-05-26 | 2017-10-03 | 中冶赛迪工程技术股份有限公司 | Intelligent coil of strip fixture |
| CN108775848A (en) * | 2018-07-16 | 2018-11-09 | 安徽悦众车身装备有限公司 | A kind of head valve position detection tooling |
| CN209416671U (en) * | 2018-12-18 | 2019-09-20 | 上海马陆日用友捷汽车电气有限公司 | Fan housing air door detection device |
| CN209230956U (en) * | 2019-01-16 | 2019-08-09 | 孝感华工高理电子有限公司 | Automobile air door executer angle automatic test equipment |
| CN209739513U (en) * | 2019-02-20 | 2019-12-06 | 泉州牡丹生物科技有限公司 | An automatic tape sealing machine |
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