CN106940166B - Explosion-proof rotary displacement measuring device and using method - Google Patents
Explosion-proof rotary displacement measuring device and using method Download PDFInfo
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- CN106940166B CN106940166B CN201710095849.5A CN201710095849A CN106940166B CN 106940166 B CN106940166 B CN 106940166B CN 201710095849 A CN201710095849 A CN 201710095849A CN 106940166 B CN106940166 B CN 106940166B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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Abstract
The cover and the support are matched by a threaded explosion-proof joint surface; the upper part of the support is provided with a through shaft hole, a bushing and a shaft are arranged in the shaft hole, the outer end face of the bushing is flush with the outer end face of the reinforced shaft hole seat and is sleeved with a sleeve, the outer side of the sleeve is provided with a cover body and a dial scale, the periphery of the cover body is fixed on the outer side surface of the support through screws, and the cover body above the dial scale is provided with locking screws; the outer end of the shaft is provided with an elastic shifting fork, the upper side surface of the cover body corresponding to the elastic shifting fork is provided with a window, and the corresponding rotating equipment is provided with a position pointer; an extension bar extends from the lower part of the support to the inside of the cover, a bottom plate is arranged at the inner end of the extension bar in a penetrating way, and a potentiometer is fixed on the bottom plate; after the inner end of the extension bar penetrates through the bottom plate, a feedback circuit board of the potentiometer is fixed at the inner end of the extension bar through a screw; the support under the extension bar is provided with an outlet part, a cable lead-in device and a grounding device. The rotary displacement measuring device is reasonable in structure, convenient to disassemble, assemble and operate and high in safety and reliability.
Description
Technical Field
The invention relates to an explosion-proof rotary displacement measuring device and a using method thereof.
Background
Because the requirements on the structure of the equipment are strict in the dangerous environment of explosive gas or combustible dust and need to be customized in a targeted manner, the conventional rotary displacement measuring device can not be used under the explosion-proof condition basically, and is complex in structure and inconvenient to operate.
Disclosure of Invention
The invention provides an explosion-proof rotary displacement measuring device and a using method thereof, which are convenient to operate, can be used in an explosion-proof environment and have higher safety and reliability.
In order to solve the technical problems, the invention adopts the following technical scheme: the explosion-proof rotary displacement measuring device comprises a cover and a support, wherein an internal thread is arranged at the opening end of the cover, an external thread is arranged at the inner end of the support, and a threaded explosion-proof joint surface is matched between the cover and the support; the upper part of the support is provided with a through shaft hole, the shaft hole is axially provided with a cylindrical reinforcing shaft hole seat, a small-inside and large-outside step hole is axially arranged in the reinforcing shaft hole seat, a lining is arranged in the step hole through an explosion-proof junction surface, a shaft penetrates through the lining through the explosion-proof junction surface, the outer end surface of the lining is flush with the outer end surface of the reinforcing shaft hole seat and is sleeved with a sleeve, a step edge is arranged on the outer side of the sleeve, a cover body and a dial are arranged on the step edge from inside to outside, the cover body and the dial are both sleeved on the step edge, the periphery of the cover body is fixed on the outer side surface of the support through screws, the dial comprises a wafer part and a scale cylinder body, the scale cylinder body is vertically arranged at the outer circle of the wafer part, a locking screw of the dial is arranged on the cover body above the dial, and a scale is arranged on the scale cylinder body; the outer end of the shaft penetrates through the sleeve, the extending end of the shaft is provided with an elastic shifting fork matched with the rotating equipment, the side surface of the cover body corresponding to the elastic shifting fork is provided with a window, the window corresponds to the position of the lower scale cylinder, and the corresponding rotating equipment is provided with a position pointer; the inner end of the shaft extends into the cover and is connected with the coupler; the lower part of the support extends into the cover to form an extension bar, the inner end of the extension bar is penetrated by a bottom plate, the potentiometer is fixed on the bottom plate through a base plate, and the input end of the potentiometer is butted with the output end of the coupler; the inner end of the extension bar penetrates through the bottom plate and then penetrates through the heightening pad, and then a feedback circuit board of the potentiometer is fixed at the inner end of the extension bar through a screw; the support below the extension bar is provided with an outlet part with a right-angle bending hole, the outlet end of the outlet part is provided with a cable lead-in device, and the outer side surface of the vertical part of the outlet part is provided with a grounding device.
The outer side of the external thread of the support is provided with a groove, the outer side of the groove is provided with an annular convex edge, an O-shaped sealing ring is embedded in the groove, an inclined plane matched with the O-shaped sealing ring is arranged at the edge of the inner opening of the opening end of the cover, and the end surface of the opening end of the cover is abutted against the annular convex edge of the support.
The inner and outer cylinder walls of the bushing in the large step hole at the outer end of the reinforced shaft hole seat are provided with grooves and are matched with O-shaped sealing rings.
A step hole with a large inside and a small outside is arranged in the horizontal section of the wire outlet part.
The cover and the support are made of ZL102 material, and the magnesium and titanium contents of the cover and the support are not more than 7.5%; the bush is made of tin bronze material, and the shaft is made of stainless steel material.
A threaded explosion-proof joint is arranged between the cover and the support, the effective meshing length of the threaded explosion-proof surface is not less than 8mm, and the number of effective meshing buckles of the threaded explosion-proof surface is not less than 5 buckles.
A cylindrical explosion-proof joint surface is arranged between the bushing and the shaft, the length of the explosion-proof surface is not less than 12.5mm, and the gap between the explosion-proof surfaces is not more than 0.019mm. A cylindrical explosion-proof joint surface is arranged between the bushing and the support, the length of the explosion-proof surface is not less than 12.5mm, and the gap between the explosion-proof surfaces is not more than 0.10mm.
An explosion-proof stuffing box is required to be matched with the cable leading-out device, a thread explosion-proof joint surface is arranged between the support and the explosion-proof stuffing box, the effective meshing length of the thread explosion-proof surface is not less than 8mm, and the effective meshing number of the thread explosion-proof surface is not less than 5; the explosion-proof level of the explosion-proof stuffing box is not lower than that of the explosion-proof rotary displacement measuring device.
The protection grade of the shell is not lower than IP65; the O-shaped sealing ring is made of anti-aging silicon rubber; the filler of the explosion-proof stuffing box is epoxy resin with ageing resistance; the feedback circuit boards all adopt weak current elements.
The use method of the explosion-proof rotary displacement measuring device comprises the following steps:
(1) Firstly, fixing a rotary displacement measuring device above rotary equipment by screws through a transition plate, and during installation, firstly adjusting the direction of an elastic shifting fork, so that when the rotary displacement measuring device is installed, two elastic sheets of the elastic shifting fork just sleeve a square key above the rotary equipment;
(2) Unscrewing a cover of the rotary displacement measuring device, and connecting a wire;
(3) Moving the rotating equipment to a full-closed position, unscrewing a locking screw on the rotary displacement measuring device, adjusting the dial plate to enable a position pointer of the rotating equipment to just point to a zero-degree position of a graduated scale on the dial plate, and screwing the locking screw;
(4) Adjusting: firstly, loosening a fixed jackscrew between a coupler and a shaft, clockwise operating a rotary device to a limit position, slightly clockwise rotating an output shaft of the coupler and a potentiometer by hand to enable the potentiometer to just exit an effective resistance range, gradually screwing the fixed jackscrew between the coupler and the shaft, and simultaneously paying attention to measuring the output of the potentiometer to basically ensure that the output of the potentiometer is unchanged at the original position;
(5) And installing a cover and screwing.
The rotary displacement measuring device is reasonable in structure, convenient to assemble, disassemble and operate, high in safety and reliability, and a unique structure is designed according to the explosion-proof requirement, so that the requirement for use in an explosion-proof environment is met.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in fig. 1, the explosion-proof rotary displacement measuring device comprises a cover 1 and a support 2, wherein an internal thread is arranged at the opening end of the cover 1, an external thread is arranged at the inner end of the support 2, and the cover 1 is matched with the support 2 through a thread explosion-proof joint surface; the upper part of the support 2 is provided with a through shaft hole, the shaft hole is axially provided with a cylindrical reinforcing shaft hole seat, a step hole with a small inside and a large outside is axially arranged in the reinforcing shaft hole seat, a bushing 3 is arranged in the step hole through an explosion-proof junction surface, a shaft 9 penetrates through the bushing 3 through the explosion-proof junction surface, the outer end surface of the bushing 3 is flush with the outer end surface of the reinforcing shaft hole seat and is sleeved with a sleeve 4, the step edge is arranged on the outer side of the sleeve 4, a cover body 5 and a dial 6 are arranged on the step edge from inside to outside, the cover body 5 and the dial 6 are both sleeved on the step edge on the outer side of the bushing 3, one circle of the cover body 5 is fixed on the outer side surface of the support 2 through a screw, the dial 6 comprises a wafer part and a scale cylinder body, the scale cylinder body is vertically arranged at the outer circle of the wafer part, a locking screw 7 of the dial is arranged on the cover body 5 above the dial 6, and a scale 8 is arranged on the scale cylinder body; the outer end of the shaft 9 penetrates through the sleeve 4, the extending end of the shaft is provided with an elastic shifting fork 10 matched with rotating equipment, the upper side face of the cover body corresponding to the elastic shifting fork 10 is provided with a window 11, the window corresponds to the position of the scale cylinder below, and the corresponding rotating equipment is provided with a position pointer; the inner end of the shaft 9 extends into the cover 1 and is connected with a coupler 12; an extension bar 13 extends from the lower part of the support 2 to the cover 1, a bottom plate 14 penetrates through the inner end of the extension bar 13, a potentiometer 15 is fixed on the bottom plate 14 through a backing plate 16, and the input end of the potentiometer 15 is in butt joint with the output end of the coupler 12; after the inner end of the extension bar 13 penetrates through the bottom plate 14, a heightening pad 17 is penetrated through, and then a feedback circuit board 19 of the potentiometer is fixed at the inner end of the extension bar 13 through a screw 18; the support 2 below the extension bar 13 is provided with a wire outlet part in a right-angle bending hole, the outlet end of the wire outlet part is provided with a cable lead-in device 20, and the outer side surface of the vertical part of the wire outlet part is provided with a grounding device 21, so that the equipment and personal safety can be ensured.
The outside of the external screw thread of support 2 is equipped with the recess, and the outside of recess is equipped with annular protruding edge, and the recess is embedded to establish O type sealing washer 21, and the interior mouth of cover open end is equipped with along arris department with O type sealing washer 21 complex inclined plane, and the terminal surface of cover open end and the annular protruding edge of support 2 are inarched.
The inner and outer cylinder walls of the bushing 3 in the large step hole at the outer end of the reinforced shaft hole seat are provided with grooves and are matched with O- shaped sealing rings 22 and 23.
A step hole with a large inside and a small outside is arranged in the horizontal section of the wire outlet part.
The cover and the support are made of ZL102 materials, the magnesium and titanium content of the cover and the support is not more than 7.5%, the cover and the support have proper strength and toughness, can bear internal explosion pressure, and cannot generate the phenomena of cracks, deformation, fragmentation and the like; the bush is made of tin bronze material, and the shaft is made of stainless steel material.
A thread explosion-proof joint 26 is arranged between the cover and the support, the effective meshing length of the thread explosion-proof joint is not less than 8mm, and the effective meshing number of the thread explosion-proof joint is not less than 5.
A cylindrical explosion-proof joint surface 24 is arranged between the bushing and the shaft, the length of the explosion-proof surface is not less than 12.5mm, and the gap between the explosion-proof surfaces is not more than 0.019mm. A cylindrical explosion-proof joint surface 25 is arranged between the bushing and the support, the length of the explosion-proof surface is not less than 12.5mm, and the gap between the explosion-proof surfaces is not more than 0.10mm. The flame-proof joint surface has the capability of preventing flame from spreading outwards.
An explosion-proof stuffing box is required to be matched with the cable leading-out device, a thread explosion-proof joint surface is arranged between the support and the explosion-proof stuffing box, the effective meshing length of the thread explosion-proof surface is not less than 8mm, and the effective meshing number of the thread explosion-proof surface is not less than 5; the explosion-proof level of the explosion-proof stuffing box is not lower than that of the explosion-proof rotary displacement measuring device.
The protection grade of the shell is not lower than IP65, the dustproof and waterproof performance is very strong, and the waterproof paint can be safely used in indoor and outdoor places; the O-shaped sealing ring is made of anti-aging silicon rubber, so that the protection capability of equipment can be effectively ensured; the filler of the explosion-proof stuffing box is made of epoxy resin with ageing resistance, so that the filler can be prevented from ageing, deteriorating and losing flame retardant capability in the service life of a product; the feedback circuit board adopts weak current elements.
Because the rotation stroke is short and the speed is slow, high friction heating and friction spark cannot be generated. The circuit board is a weak current element, the voltage and the current are lower, and the high-temperature heating phenomenon cannot be generated during use. The internal components are lighter in weight, causing less eccentricity of the shaft, and the amount of eccentricity is within a controlled range, without exacerbating the friction risk.
The working principle is as follows: the rotary displacement measuring device is installed on the rotary equipment through the elastic shifting fork, when the rotary equipment is electrified to work, the elastic shifting fork drives a shaft in the rotary displacement measuring device to rotate, the potentiometer fixed at the shaft end rotates together with the shaft to cause the resistance value of the potentiometer to change, the change of the resistance value is converted into a signal of 4-20 mA through the feedback circuit board, or a switching value signal of a full-on position and a full-off position, and the signal is transmitted to a field and a remote control operation station, so that the angle measurement of the rotary equipment is realized.
The use method of the explosion-proof rotary displacement measuring device comprises the following steps:
(1) Firstly, fixing a rotary displacement measuring device above rotary equipment by using screws through a transition plate, and during installation, firstly adjusting the direction of an elastic shifting fork, so that two elastic sheets of the elastic shifting fork just sleeve a square key above the rotary equipment when the rotary displacement measuring device is installed;
(2) Unscrewing a cover of the rotary displacement measuring device, and connecting a wire;
(3) Moving the rotating equipment to a full-closed position, unscrewing a locking screw on the rotary displacement measuring device, adjusting the dial plate to enable a position pointer of the rotating equipment to just point to a zero-degree position of a graduated scale on the dial plate, and screwing the locking screw;
(4) Adjusting: firstly, loosening a fixed jackscrew between a coupler and a shaft, clockwise operating a rotary device to a limit position, slightly clockwise rotating an output shaft of the coupler and a potentiometer by hand to enable the potentiometer to just exit an effective resistance range, gradually screwing the fixed jackscrew between the coupler and the shaft, and simultaneously paying attention to measuring the output of the potentiometer to basically ensure that the output of the potentiometer is unchanged at the original position;
(5) And installing the cover and screwing.
Claims (10)
1. Explosion-proof rotary displacement measuring device, its characterized in that: the flame-proof device comprises a cover and a support, wherein an internal thread is arranged at the opening end of the cover, an external thread is arranged at the inner end of the support, and the cover and the support are matched by a threaded flame-proof joint surface; the upper part of the support is provided with a through shaft hole, the shaft hole is axially provided with a cylindrical reinforcing shaft hole seat, a step hole with a small inside and a large outside is axially arranged in the reinforcing shaft hole seat, a bushing is arranged in the step hole through an explosion-proof junction surface, a shaft penetrates through the bushing through the explosion-proof junction surface, the outer end surface of the bushing is flush with the outer end surface of the reinforcing shaft hole seat and is sleeved with a sleeve, a step edge is arranged on the outer side of the sleeve, a cover body and a dial are arranged on the step edge from inside to outside, the cover body and the dial are both sleeved on the step edge, the periphery of the cover body is fixed on the outer side surface of the support through screws, the dial comprises a disc part and a scale cylinder body, the scale cylinder body is vertically arranged at the outer circle of the disc part, a locking screw of the dial is arranged on the cover body above the dial, and a scale is arranged on the scale cylinder body; the outer end of the shaft penetrates through the sleeve, the extending end of the shaft is provided with an elastic shifting fork matched with rotating equipment, the side surface of the cover body corresponding to the elastic shifting fork is provided with a window, the window corresponds to the position of the lower scale cylinder, and the corresponding rotating equipment is provided with a position pointer; the inner end of the shaft extends into the cover and is connected with the coupler; the lower part of the support extends into the cover to form an extension bar, the inner end of the extension bar is penetrated by a bottom plate, the potentiometer is fixed on the bottom plate through a base plate, and the input end of the potentiometer is butted with the output end of the coupler; the inner end of the extension bar penetrates through the bottom plate and then penetrates through the heightening pad, and then the feedback circuit board of the potentiometer is fixed at the inner end of the extension bar through a screw; the support below the extension bar is provided with an outlet part with a right-angle bending hole, the outlet end of the outlet part is provided with a cable lead-in device, and the outer side surface of the vertical part of the outlet part is provided with a grounding device.
2. The explosion-proof rotary displacement measurement device of claim 1, characterized in that: the outside of the external screw thread of support is equipped with the recess, and the outside of recess is equipped with annular protruding edge, and the recess is embedded to establish O type sealing washer, and the interior mouth of cover open end is equipped with along arris department with O type sealing washer complex inclined plane, the terminal surface of cover open end and the annular protruding edge butt of support.
3. The explosion-proof rotary displacement measuring device of claim 2, characterized in that: the inner and outer cylinder walls of the bushing in the large step hole at the outer end of the reinforced shaft hole seat are provided with grooves and are provided with O-shaped sealing rings in a matching way.
4. An explosion-proof rotary displacement measuring device according to claim 3, characterized in that: a step hole with a large inner part and a small outer part is arranged in the horizontal section of the wire outlet part.
5. The explosion-proof rotary displacement measuring device of claim 1, wherein: the cover and the support are made of ZL102 material, and the magnesium and titanium contents of the cover and the support are not more than 7.5%; the bush is made of tin bronze material, and the shaft is made of stainless steel material.
6. The explosion-proof rotary displacement measuring device of claim 4, wherein: the cover and the support are in threaded explosion-proof joint, the effective meshing length of the threaded explosion-proof surface is not less than 8mm, and the number of effective meshing buckles of the threaded explosion-proof surface is not less than 5 buckles.
7. The explosion-proof rotary displacement measurement device of claim 4, wherein: a cylindrical explosion-proof joint surface is arranged between the bushing and the shaft, the length of the explosion-proof surface is not less than 12.5mm, and the gap between the explosion-proof surfaces is not more than 0.019mm; a cylindrical explosion-proof joint surface is arranged between the bushing and the support, the length of the explosion-proof surface is not less than 12.5mm, and the gap between the explosion-proof surfaces is not more than 0.10mm.
8. The explosion-proof rotary displacement measurement device of claim 7, wherein: the cable leading-out device needs to be matched with an explosion-proof stuffing box, a thread explosion-proof joint surface is arranged between the support and the explosion-proof stuffing box, the effective meshing length of the thread explosion-proof surface is not less than 8mm, and the effective meshing number of the thread explosion-proof surface is not less than 5; the explosion-proof level of the explosion-proof stuffing box is not lower than that of the explosion-proof rotary displacement measuring device.
9. An explosion-proof rotary displacement measuring device according to claim 8, characterized in that: the protection grade of the shell is not lower than IP65; the O-shaped sealing ring is made of anti-aging silicon rubber; the filler of the explosion-proof stuffing box is epoxy resin with ageing resistance; the feedback circuit boards all adopt weak current elements.
10. Use of an explosion proof rotary displacement measuring device according to any of claims 1-9, comprising the steps of:
(1) Firstly, fixing a rotary displacement measuring device above rotary equipment by using screws through a transition plate, and during installation, firstly adjusting the direction of an elastic shifting fork, so that two elastic sheets of the elastic shifting fork just sleeve a square key above the rotary equipment when the rotary displacement measuring device is installed;
(2) Unscrewing a cover of the rotary displacement measuring device, and connecting a wire;
(3) Moving the rotating equipment to a full-closed position, unscrewing a locking screw on the rotary displacement measuring device, adjusting the dial to enable a position pointer of the rotating equipment to just point to a zero-degree position of a graduated scale on the dial, and screwing the locking screw;
(4) Adjusting: firstly, loosening a fixed jackscrew between a coupler and a shaft, clockwise operating a rotary device to a limit position, slightly clockwise rotating an output shaft of the coupler and a potentiometer by hand to enable the potentiometer to just exit an effective resistance range, gradually screwing the fixed jackscrew between the coupler and the shaft, and simultaneously paying attention to measuring the output of the potentiometer to basically ensure that the output of the potentiometer is unchanged at the original position;
(5) And installing a cover and screwing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710095849.5A CN106940166B (en) | 2017-02-22 | 2017-02-22 | Explosion-proof rotary displacement measuring device and using method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710095849.5A CN106940166B (en) | 2017-02-22 | 2017-02-22 | Explosion-proof rotary displacement measuring device and using method |
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| CN106940166A CN106940166A (en) | 2017-07-11 |
| CN106940166B true CN106940166B (en) | 2022-11-11 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CH288771A (en) * | 1949-09-29 | 1953-02-15 | Gen Electric Co Ltd | Apparatus for measuring the thickness of non-magnetizable layers on magnetizable materials. |
| JPH0645256Y2 (en) * | 1985-02-13 | 1994-11-16 | 東芝機械株式会社 | Wire type velocity displacement detector |
| JP2001071782A (en) * | 1999-06-30 | 2001-03-21 | Aisin Seiki Co Ltd | Actuator for drive condition switching device |
| CN201041504Y (en) * | 2007-06-08 | 2008-03-26 | 杜国凯 | Oscillating detection material level instrument |
| CN201210069Y (en) * | 2008-04-14 | 2009-03-18 | 北京拓盛电子科技有限公司 | Encoder suitable for being embedded in flow meter |
| JP5781913B2 (en) * | 2011-12-21 | 2015-09-24 | アズビル株式会社 | Method and apparatus for detecting sticking of rotating shaft of angle sensor |
| CN202900254U (en) * | 2012-09-28 | 2013-04-24 | 蚌埠赛英电子科技发展有限公司 | Oil field explosion-proof winch sensor |
| DE102014016052A1 (en) * | 2014-10-30 | 2016-05-04 | Hengstler Gmbh | Explosion-proof housing for a sensor |
| CN206740066U (en) * | 2017-02-22 | 2017-12-12 | 南阳中天防爆电气有限公司 | Explosion-proof swing offset measurement apparatus |
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2017
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Address after: 473000 No.1 Industrial Park, high tech Zone, Nanyang City, Henan Province Applicant after: Nanyang Zhongtian explosion proof Electric Co.,Ltd. Address before: 473000 No.1 Industrial Park, high tech Zone, Nanyang City, Henan Province Applicant before: NANYANG ZHONGTIAN EXPLOSION-PROOF ELECTRIC Co.,Ltd. |
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