CN213629795U - Strong magnetic fixing device of chemical gas sensor - Google Patents
Strong magnetic fixing device of chemical gas sensor Download PDFInfo
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- CN213629795U CN213629795U CN202022216469.2U CN202022216469U CN213629795U CN 213629795 U CN213629795 U CN 213629795U CN 202022216469 U CN202022216469 U CN 202022216469U CN 213629795 U CN213629795 U CN 213629795U
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Abstract
The utility model discloses a strong magnetic fixing device of a chemical gas sensor.A connecting piece with an internal thread blind hole is arranged at the center of a rubber mounting plate, and the periphery of the rubber mounting plate is provided with at least two magnetic seat components with magnetic shielding covers; a non-metallic material sheet is arranged between the magnetic base body and the magnetic shield; the magnetic field direction of the core cylinder made of the permanent magnetic material is vertical to the axial lead of the core cylinder; the magnetic base body is formed by embedding or welding a ferromagnetic block with a non-magnetic material strip, and the non-magnetic material strip is symmetrically arranged in the width direction of the magnetic base body as a part of a hole wall of a circular counter bore in which the adaptive core cylinder can rotate; owing to adopted to set up the magnetic base subassembly of adjustable magnetic attraction size on the rubber mounting panel, combine the use of magnetic shield cover, realized chemical gas sensor's installation and fixed, need not welding, the adsorptivity is strong, and the jar body or the pipeline of adaptable different curvature radius have the regulatory function of magnetism power, and loading and unloading convenient and fast can not influence the normal operating condition of gas sensor and its circuit.
Description
Technical Field
The utility model relates to a fixing device field of chemical gas sensor especially relates to a strong magnetism fixing device of chemical gas sensor.
Background
The gas sensor for on-line monitoring in the chemical industry is generally installed by directly welding a fixing bolt on the outer wall of a pipeline, and the sensor is forbidden to be installed in a welding mode for the pipeline which needs to be installed on a tank body or is sensitive to welding and easy to cause welding cracks; however, the non-welding installation methods such as the full-shell embracing type or the hinge binding type in the prior art are limited by the perimeter of the tank body or the pipeline, and the fixing device is expensive in material and heavy, and is not easy to assemble and disassemble.
Therefore, there is still a need for improvement and development of the prior art.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a chemical gas sensor's strong magnetism fixing device need not welding, the adsorptivity is strong, adaptable different curvature radius's jar body or pipeline to adjustable adsorption affinity size, easy loading and unloading, and do not influence the normal operating condition of gas sensor and its circuit, especially adapted installs on jar body or the pipeline that comparatively sensitive and easily cause the welding crack of butt welding.
The technical scheme of the utility model as follows: a strong magnetic fixing device of a chemical gas sensor comprises a rubber mounting plate, a connecting piece, at least two magnetic base assemblies and a magnetic shield; a first mounting hole matched with the tight sleeve connecting piece is formed in the center of the rubber mounting plate, at least two second mounting holes matched with the tight sleeve magnetic shielding covers are formed in the periphery of the first mounting hole, and each second mounting hole is internally tightly sleeved with one magnetic shielding cover provided with a magnetic base assembly; an internal thread blind hole matched with the gas sensor is formed in the center of the upper end face of the connecting piece; after assembly, the top surface of the connecting piece is higher than the top surface of the rubber mounting plate, and the top surface of the magnetic shield is flush with the top surface of the rubber mounting plate;
each magnetic seat component comprises a magnetic seat body and a core column body; the core column body is made of permanent magnetic material, and the magnetic field direction of the core column body is vertical to the axial lead of the core column body; the magnetic base body is formed by embedding or welding a ferromagnetic block with a non-magnetic material strip, a circular counter bore which is matched with the core cylinder and can rotate in the core cylinder in a non-contact way is arranged downwards at the center of the top surface of the magnetic base body along the height direction of the magnetic base body, and the non-magnetic material strip is used as a part of the hole wall of the circular counter bore and is symmetrically arranged in the width direction of the magnetic base body;
when the magnetic field direction of the core column body rotates to the position of the ferromagnetic block, the magnetic attraction of the magnetic base body becomes stronger; when the magnetic field direction of the core cylinder rotates to the position of the non-magnetic material strip, the magnetic attraction of the magnetic seat body is weakened;
the magnetic shield is made of soft magnetic material sheets, the top wall and the peripheral side walls of the magnetic shield are integrally connected, and the bottom of the magnetic shield is provided with an opening; a through hole for preventing the core cylinder from falling off from the magnetic seat body is arranged at the center of the top wall of the magnetic shielding cover; a rectangular cavity matched with the magnetic seat body is arranged in the magnetic shield, and the magnetic seat body and the magnetic shield are separated by adopting a non-metallic material sheet.
Chemical industry gas sensor's strong magnetism fixing device, wherein: the cross sections of the connecting piece and the first mounting hole are both elliptical, and the second mounting hole is located on the peripheries of two ends of the long axis of the elliptical first mounting hole.
Chemical industry gas sensor's strong magnetism fixing device, wherein: the hole opening of the round counter bore on the top surface of the magnetic seat body is coaxially provided with a circle of step holes, the top of the core column body is coaxially connected with a rotary table which is matched with the rotary table to rotate in the step holes, the side wall of the rotary table is transversely convexly provided with a positioning pin, and the side wall of the step holes is provided with a fan-shaped limiting groove with a quarter arc length and used for matching the positioning pin to slide in the limiting groove and limiting the rotating angle of the rotary table.
Chemical industry gas sensor's strong magnetism fixing device, wherein: the center of the top surface of the turntable is coaxially connected with a rotating shaft, and the cross section from the top end of the rotating shaft to the middle lower part of the rotating shaft is square.
Chemical industry gas sensor's strong magnetism fixing device, wherein: the top surface of the rotating shaft is also provided with a straight groove used for indicating the magnetic field direction of the core column body along the diagonal direction of the square.
Chemical industry gas sensor's strong magnetism fixing device, wherein: the turntable, the positioning pin and the rotating shaft are all made of nonmagnetic material rods.
Chemical industry gas sensor's strong magnetism fixing device, wherein: the inner diameter of a through hole in the center of the top wall of the magnetic shield is smaller than the outer diameter of the rotary table on the top of the core cylinder.
Chemical industry gas sensor's strong magnetism fixing device, wherein: the magnetic shield and the magnetic base body are both rectangular cuboids with the width smaller than the length and the height; the core column body is in a cylinder shape with the diameter smaller than the inner diameter of the round counter bore.
Chemical industry gas sensor's strong magnetism fixing device, wherein: the rubber mounting plate is in a rectangular cube shape with the thickness smaller than the length and the width, and is made of a polyurethane rubber plate or a natural rubber plate; the connecting piece is columnar and is made of stainless steel bars.
The utility model provides a strong magnetism fixing device of chemical gas sensor, owing to adopted and set up the magnetic base subassembly of adjustable magnetic attraction size on the rubber mounting panel, combine the use of magnetic shield cover, the installation and the fixing of chemical gas sensor have been realized, and need not the welding, the adsorptivity is strong, adaptable different curvature radius's jar body or pipeline, and the adsorption affinity size of magnetic base is adjusted to the rotatory core cylinder of accessible, the regulatory function who has the magnetism strong and weak, loading and unloading convenient and fast, can not influence the normal operating condition of gas sensor and its circuit again, be particularly suitable for installing on jar body or the pipeline that the butt welding is comparatively sensitive and easily cause the welding crackle.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way; the shapes, the proportional sizes and the like of the various components in the drawings are only schematic and are used for helping the understanding of the invention, and the shapes, the proportional sizes and the like of the various components of the invention are not particularly limited; the skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.
FIG. 1 is a schematic structural view of a strong magnetic fixing device of a chemical gas sensor according to an embodiment of the present invention;
fig. 2 is a schematic top view of the present invention in fig. 1;
FIG. 3 is an enlarged schematic view of the exploded structure of a single magnetic base assembly used in the embodiment of the strong magnetic fixing device of the chemical gas sensor of the present invention;
FIG. 4 is an enlarged schematic view of the structure of a single magnetic shield used in the embodiment of the strong magnetic fixing device of the chemical gas sensor of the present invention;
the various reference numbers in the figures are summarized: the magnetic bearing comprises a rubber mounting plate 110, a first mounting hole 112, a second mounting hole 114, a connecting piece 120, an internally threaded blind hole 121, a magnetic bearing assembly 130, a magnetic bearing body 131, a ferromagnetic block 131a, a non-magnetic material strip 131b, a circular counter bore 131c, a limiting groove 131d, a core cylinder 132, a straight groove 132a, a rotating shaft 132b, a rotating disc 132c, a positioning pin 132d, a magnetic shield 140, a top wall 141 (of the magnetic shield 140), a side wall 142 (of the magnetic shield 140), a cavity 143 and a through hole 144.
Detailed Description
The following detailed description and examples of the present invention are provided in connection with the accompanying drawings, which are set forth for the purpose of illustration only and are not intended to limit the invention.
As shown in fig. 1 and fig. 2, fig. 1 is a schematic front view of an embodiment of a strong magnetic fixing device of a chemical gas sensor, and fig. 2 is a schematic top view of fig. 1; the utility model discloses a strong magnetic fixing device of a chemical gas sensor, which comprises a rubber mounting plate 110, a connecting piece 120, at least two magnetic base components 130 and a magnetic shield 140; the center of the rubber mounting plate 110 is provided with a first mounting hole 112 adapted to be tightly sleeved into the connecting member 120, the periphery of the first mounting hole 112 is provided with at least two second mounting holes 114 adapted to be tightly sleeved into the magnetic shield 140, and each second mounting hole 114 is tightly sleeved into one magnetic shield 140 provided with the magnetic base assembly 130; an internally threaded blind hole 121 adapted to mount a gas sensor (not shown) is provided at the center of the upper end surface of the connector 120.
Specifically, the rubber mounting plate 110 is in the shape of a rectangular cube with the thickness smaller than the length and the width, and is made of a polyurethane rubber plate or a natural rubber plate with high tensile strength characteristic, so that the rubber mounting plate can be well matched with the outer walls of the tank bodies or the pipelines with different curvature radiuses by utilizing the flexibility of the rubber mounting plate; the connecting member 120 is cylindrical and can be made of stainless steel rods, and the top surface of the connecting member 120 is higher than the top surface of the rubber mounting plate 110 after assembly.
Preferably, the cross sections of the connecting member 120 and the first mounting hole 112 are both elliptical, and the second mounting hole 114 is located at the periphery of the two ends of the major axis of the elliptical first mounting hole 112; the elliptical shape has the advantage that when the rubber mounting plate 110 is mounted on the outer wall of the tank or the pipeline with a smaller curvature radius, the rubber mounting plate cannot cause the position and the direction of the gas sensor on the connecting member 120 to deviate, so as to enhance the fixing effect of the gas sensor.
Referring to fig. 3, fig. 3 is an enlarged schematic view of an exploded structure of a single magnetic base assembly used in an embodiment of the strong magnetic fixing device of the chemical gas sensor of the present invention, where each magnetic base assembly 130 includes a magnetic base body 131 and a core cylinder 132; after assembly, the core cylinder 132 is located in the magnetic base body 131 and can rotate back and forth within 90 degrees around the axis of the core cylinder 132 to adjust the magnetic attraction of the magnetic base body 131; in order to show the internal structure of the magnetic base body 131, the core cylinder 132 is separated from the magnetic base body 131 as shown in fig. 3.
The magnetic base body 131 is in a rectangular cube shape with the width smaller than the length and the height, and the magnetic base body 131 is integrally formed by embedding or welding non-magnetic material strips 131b such as stainless steel strips, copper strips and the like into a ferromagnetic block 131a such as carbon steel and the like; a circular counter bore 131c in which the core cylinder 132 can rotate in a non-contact manner is arranged downwards along the height direction of the center of the top surface of the magnetic base body 131, and the non-magnetic material strips 131b are symmetrically arranged in the width direction of the magnetic base body 131 as a part of the hole wall forming the circular counter bore 131 c;
the core cylinder 132 is cylindrical with a diameter smaller than the inner diameter of the circular counterbore 131c, so that the core cylinder 132 does not contact the magnetic seat body 131 during the rotation process in the circular counterbore 131c, thereby avoiding any damage to the magnetism of the core cylinder 132; the core column 132 is made of permanent magnetic materials such as an aluminum-nickel-cobalt permanent magnetic alloy material, an iron-chromium-cobalt permanent magnetic alloy material, a permanent magnetic ferrite material, a rare earth permanent magnetic material or a composite permanent magnetic material, the magnetic field direction of the core column 132 is perpendicular to the axial lead of the core column, and the distribution of the magnetic field direction can be specifically controlled in the process of manufacturing the core column 132;
a circle of stepped holes (not shown) are coaxially arranged at the hole opening of the circular counter bore 131c on the top surface of the magnetic base body 131, the top of the core column body 132 is coaxially connected with a rotary disc 132c which is adapted to rotate in the stepped hole, a positioning pin 132d is transversely convexly arranged on the side wall of the rotary disc 132c, and a fan-shaped limiting groove 131d with a quarter arc length is arranged on the side wall of the stepped hole and is used for adapting to the sliding of the positioning pin 132d in the positioning pin and limiting the rotating angle of the rotary disc 132 c; a rotating shaft 132b is coaxially connected to the center of the top surface of the rotating disc 132c, and the cross section from the top end of the rotating shaft 132b to the middle lower part thereof is square, so that a wrench or other tools can be used to pull the rotating shaft 132b to drive the rotating disc 132c and the core cylinder 132 to rotate together; a linear groove 132a is further formed on the top surface of the rotating shaft 132b along the diagonal direction of the square, so that a tool such as a linear screwdriver can be used to screw the rotating shaft 132b to drive the rotating disc 132c and the core cylinder 132 to rotate together.
The turntable 132c, the positioning pin 132d and the rotating shaft 132b are all made of non-magnetic material rods such as stainless steel rods and copper rods; preferably, when the rotating disc 132c is coupled (e.g., welded or clamped) to the core cylinder 132, the linear groove 132a at the top end of the rotating shaft 132b is used to indicate the magnetic field direction of the core cylinder 132.
When the magnetic field direction of the core cylinder 132 is rotated to the position of the ferromagnetic block 131a of carbon steel or the like, the magnetic base body 131 is strongly magnetized so that the magnetic attraction of the magnetic base body 131 becomes strong, and when the magnetic field direction of the core cylinder 132 is rotated to the position of the strip 131b of non-magnetic material such as stainless steel strip, copper strip or the like, the magnetic base body 131 is weakly magnetized so that the magnetic attraction of the magnetic base body 131 becomes weak.
Referring to fig. 4, fig. 4 is an enlarged schematic view of a single magnetic shield used in an embodiment of the strong magnetic fixing device of the chemical gas sensor according to the present invention, in order to show the internal structure of the magnetic shield 140, the top wall of the magnetic shield 140 shown in fig. 4 is cut and separated from the surrounding side walls; the magnetic shield 140 is also in the shape of a rectangular cube with the width smaller than the length and the height, and the magnetic shield 140 is made of soft magnetic material sheets such as soft iron sheets, silicon steel sheets or permalloy sheets; the top wall 141 of the magnetic shield 140 is integrally connected to the peripheral side wall 142, and only the bottom of the magnetic shield 140 is open; a rectangular cavity 143 adapted to the magnetic base body 131 is formed in the magnetic shield 140, and gaps between the peripheral side surfaces of the magnetic base body 131 and the peripheral inner side walls 142 of the magnetic shield 140 and gaps between the top surface of the magnetic base body 131 and the inner top wall 141 of the magnetic shield 140 are separated by a non-metallic material sheet (not shown) containing bubble pores, such as a pearl cotton sheet and a sponge sheet; a through hole 144 having an inner diameter smaller than the outer diameter of the turntable 132c of fig. 3 is formed at the center of the top wall of the magnetic shield 140 to prevent the core cylinder 132 from falling off the magnetic base body 131, and the top surface of the magnetic shield 140 is flush with the top surface of the rubber mounting plate 110 after assembly.
Because the magnetic conductivity of the soft magnetic material sheet is thousands of times greater than that of air, the magnetic resistance of the non-metallic material sheet containing bubble pores is much greater than that of the magnetic shield 140 made of the soft magnetic material sheet, so that most of the magnetic induction lines generated by the strong magnetic field of the magnetic base assembly 130 pass through the inner wall of the magnetic shield 140, thereby achieving the purpose of shielding the magnetic field of the top surface of the magnetic base body 131 and the peripheral side surface of the magnetic base body 131 by utilizing the static magnetic shielding principle, and further avoiding the adverse effect of the strong magnetic field of the magnetic base assembly 130 on the gas sensor and the circuit thereof; moreover, since the bottom of the magnetic shielding case 140 is open, the magnetic field in the bottom direction of the magnetic base body 131 is not shielded, and thus the magnetic attraction force on the bottom of the magnetic base body 131 is not weakened and can still be absorbed normally; the thickness of the non-metallic material sheet spaced between the magnetic base assembly 130 and the magnetic shield 140 and the thickness of the magnetic shield 140 can be optimized according to the magnetic shielding effect required by the gas sensor and the circuit thereof, and will not be described herein again.
The utility model discloses chemical industry gas sensor's strong magnetism fixing device's equipment order is: firstly, the core cylinder 132 welded with the rotating disc 132c, the rotating shaft 132b and the positioning pin 132d is arranged in the circular counter bore 131c of the magnetic seat body 131 to form a single magnetic seat assembly 130; then, the magnetic shielding cover 140 with the inner wall stuck with the non-metallic material sheet is reversely buckled and sleeved on the magnetic seat assembly 130, and the rotating shaft 132b of the core cylinder 132 is upward; then, the magnetic base assembly 130 with the magnetic shield 140 is embedded in the second mounting hole 114 of the rubber mounting plate 110, and the rotating shaft 132b of the core cylinder 132 is also kept upward; finally, the connecting member 120 is embedded in the first mounting hole 112 of the rubber mounting plate 110, and the inner threaded blind hole 121 faces upwards.
Before the installation of the strong magnetic fixing device of the chemical gas sensor, the square rotating shaft 132b or the straight groove 132a at the top end thereof is rotated by using a corresponding tool, so that the magnetic attraction of each magnetic seat assembly 130 is adjusted to the state of the minimum attraction; then attaching the rubber mounting plate 110 on the outer wall of the tank or the pipeline so as to position the strong magnetic fixing device; then, the square rotating shaft 132b or the straight groove 132a at the top end thereof is rotated by using a corresponding tool, so that the magnetic attraction force of each magnetic seat assembly 130 is adjusted to be in a state of large and small attraction force, and the strong magnetic fixing device is fixed conveniently; finally, screwing the gas sensor into the internal thread blind hole 121 of the connecting piece 120 and screwing; if need dismantle this strong magnetic fixing device, only need utilize corresponding instrument to rotate square pivot 132b or the straight line groove 132a on its top, adjust the state of minimum adsorption affinity with the magnetic attraction of every magnetic base subassembly 130, can easily take off attached rubber mounting panel 110 on the outer wall of jar body or pipeline.
It should be understood that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and those skilled in the art can add, subtract, replace, change or modify the above-mentioned embodiments within the spirit and principle of the present invention, and all such additions, substitutions, changes or modifications should fall within the scope of the appended claims.
Claims (9)
1. A strong magnetic fixing device of a chemical gas sensor is characterized by comprising a rubber mounting plate, a connecting piece, at least two magnetic base assemblies and a magnetic shield; a first mounting hole matched with the tight sleeve connecting piece is formed in the center of the rubber mounting plate, at least two second mounting holes matched with the tight sleeve magnetic shielding covers are formed in the periphery of the first mounting hole, and each second mounting hole is internally tightly sleeved with one magnetic shielding cover provided with a magnetic base assembly; an internal thread blind hole matched with the gas sensor is formed in the center of the upper end face of the connecting piece; after assembly, the top surface of the connecting piece is higher than the top surface of the rubber mounting plate, and the top surface of the magnetic shield is flush with the top surface of the rubber mounting plate;
each magnetic seat component comprises a magnetic seat body and a core column body; the core column body is made of permanent magnetic material, and the magnetic field direction of the core column body is vertical to the axial lead of the core column body; the magnetic base body is formed by embedding or welding a ferromagnetic block with a non-magnetic material strip, a circular counter bore which is matched with the core cylinder and can rotate in the core cylinder in a non-contact way is arranged downwards at the center of the top surface of the magnetic base body along the height direction of the magnetic base body, and the non-magnetic material strip is used as a part of the hole wall of the circular counter bore and is symmetrically arranged in the width direction of the magnetic base body;
when the magnetic field direction of the core column body rotates to the position of the ferromagnetic block, the magnetic attraction of the magnetic base body becomes stronger; when the magnetic field direction of the core cylinder rotates to the position of the non-magnetic material strip, the magnetic attraction of the magnetic seat body is weakened;
the magnetic shield is made of soft magnetic material sheets, the top wall and the peripheral side walls of the magnetic shield are integrally connected, and the bottom of the magnetic shield is provided with an opening; a through hole for preventing the core cylinder from falling off from the magnetic seat body is arranged at the center of the top wall of the magnetic shielding cover; a rectangular cavity matched with the magnetic seat body is arranged in the magnetic shield, and the magnetic seat body and the magnetic shield are separated by adopting a non-metallic material sheet.
2. The strong magnetic fixing device of the chemical gas sensor according to claim 1, wherein: the cross sections of the connecting piece and the first mounting hole are both elliptical, and the second mounting hole is located on the peripheries of two ends of the long axis of the elliptical first mounting hole.
3. The strong magnetic fixing device of the chemical gas sensor according to claim 1, wherein: the hole opening of the round counter bore on the top surface of the magnetic seat body is coaxially provided with a circle of step holes, the top of the core column body is coaxially connected with a rotary table which is matched with the rotary table to rotate in the step holes, the side wall of the rotary table is transversely convexly provided with a positioning pin, and the side wall of the step holes is provided with a fan-shaped limiting groove with a quarter arc length and used for matching the positioning pin to slide in the limiting groove and limiting the rotating angle of the rotary table.
4. The strong magnetic fixing device of the chemical gas sensor according to claim 3, wherein: the center of the top surface of the turntable is coaxially connected with a rotating shaft, and the cross section from the top end of the rotating shaft to the middle lower part of the rotating shaft is square.
5. The strong magnetic fixing device of the chemical gas sensor according to claim 4, wherein: the top surface of the rotating shaft is also provided with a straight groove used for indicating the magnetic field direction of the core column body along the diagonal direction of the square.
6. The strong magnetic fixing device of the chemical gas sensor according to claim 5, wherein: the turntable, the positioning pin and the rotating shaft are all made of nonmagnetic material rods.
7. The strong magnetic fixing device of the chemical gas sensor according to claim 3, wherein: the inner diameter of a through hole in the center of the top wall of the magnetic shield is smaller than the outer diameter of the rotary table on the top of the core cylinder.
8. The strong magnetic fixing device of the chemical gas sensor according to claim 1, wherein: the magnetic shield and the magnetic base body are both rectangular cuboids with the width smaller than the length and the height; the core column body is in a cylinder shape with the diameter smaller than the inner diameter of the round counter bore.
9. The strong magnetic fixing device of the chemical gas sensor according to claim 1, wherein: the rubber mounting plate is in a rectangular cube shape with the thickness smaller than the length and the width, and is made of a polyurethane rubber plate or a natural rubber plate; the connecting piece is columnar and is made of stainless steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022216469.2U CN213629795U (en) | 2020-10-09 | 2020-10-09 | Strong magnetic fixing device of chemical gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022216469.2U CN213629795U (en) | 2020-10-09 | 2020-10-09 | Strong magnetic fixing device of chemical gas sensor |
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| Publication Number | Publication Date |
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| CN213629795U true CN213629795U (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022216469.2U Active CN213629795U (en) | 2020-10-09 | 2020-10-09 | Strong magnetic fixing device of chemical gas sensor |
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| CN (1) | CN213629795U (en) |
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- 2020-10-09 CN CN202022216469.2U patent/CN213629795U/en active Active
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