CN216283238U - Magnetostrictive displacement sensor sealing structure - Google Patents
Magnetostrictive displacement sensor sealing structure Download PDFInfo
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- CN216283238U CN216283238U CN202122610976.9U CN202122610976U CN216283238U CN 216283238 U CN216283238 U CN 216283238U CN 202122610976 U CN202122610976 U CN 202122610976U CN 216283238 U CN216283238 U CN 216283238U
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Abstract
The utility model provides a magnetostrictive displacement sensor sealing structure which comprises an outer measuring rod, a welding flange, a PCBA (printed circuit board assembly) board, an epoxy resin layer, a cable, a rubber ring, a pressure ring and a locking nut, wherein the outer measuring rod is fixed on the PCBA board; the welding flange is arranged at the top of the outer measuring rod, and the top of the outer measuring rod is embedded into the hollow cavity of the welding flange; the PCBA board is arranged at the top of the outer measuring rod and is positioned in the hollow cavity of the welding flange; the cable is connected with the PCBA board; the epoxy resin is positioned in the hollow cavity of the welding flange and covers the PCBA board; the PCBA board, the cable and the inner wall of the welding flange are sealed by the epoxy resin; the inner wall of the welding flange is provided with internal threads; the rubber ring is in a hollow cylinder shape and is arranged above the epoxy resin; the compression ring is in a hollow cylindrical shape and is positioned above the rubber ring; the lock nut is a hollow cylinder, and the outer wall of the lock nut is provided with external threads. The sealing structure of the magnetostrictive displacement sensor has good sealing effect and is convenient to maintain, disassemble and assemble.
Description
Technical Field
The utility model relates to the field of detection in engineering, in particular to a sealing structure of a magnetostrictive displacement sensor.
Background
The magnetostrictive displacement sensor is widely applied to the fields of various production and manufacturing industries such as petroleum, chemical engineering, food, water conservancy and the like. Due to the characteristics of the medium, the sealing and wire locking performance of the outgoing line of the sensor is very important, and the sealing and wire locking performance of the sensor directly influences whether the sensor works normally or not. The sealing structure of the existing magnetostrictive displacement sensor is shown in fig. 1: after the cable 09 and the PCBA board 014 are connected, the PCBA board 014 and a shell (the welding flange 015 and the outer measuring rod 016 are welded to form the shell) are assembled to the position shown in the figure, then epoxy resin is filled in the shell to reach a preset height, and the epoxy resin is cured to form an epoxy resin layer 013. The purpose of the potting epoxy resin is for water and moisture proofing, and the potting epoxy resin also plays a role in fixing the cable and the PCBA.
The purpose of encapsulating epoxy resin in the prior art is waterproof, dampproofing and solidus, but the method of encapsulating epoxy resin in the prior art has following hidden danger:
firstly, the proportion of expansion with heat and contraction with cold of the epoxy resin is inconsistent, and the affinity of the epoxy resin and the cable outer layer insulating sheath is poor, so that gaps can appear among the welding flange, the cable outer layer insulating sheath and the epoxy resin after long-time use, and further the waterproof and moisture-proof performance is damaged;
secondly, the cable cannot be ensured to be centered, and hidden danger is left for the disassembly and assembly of subsequent equipment;
thirdly, in case functional circuit board PCBA breaks down, when needing the maintenance, need clear away epoxy and just can maintain, current epoxy is thicker, and inconvenient dismantlement, and the maintenance is consuming time hard, and is very inconvenient.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a sealing structure of a magnetostrictive displacement sensor, which overcomes the defects in the prior art, can improve the sealing effect of the magnetostrictive displacement sensor and is convenient to disassemble, assemble and maintain.
In order to achieve the purpose, the utility model provides the following technical scheme: the magnetostrictive displacement sensor sealing structure comprises an outer measuring rod, a welding flange, a PCBA board, an epoxy resin layer and a cable; the welding flange is arranged at the top of the outer measuring rod, and the top of the outer measuring rod is embedded into the hollow cavity of the welding flange; the PCBA board is arranged at the top of the outer measuring rod and is positioned in the hollow cavity of the welding flange; the cable is connected with the PCBA board; the epoxy resin layer is positioned in the hollow cavity of the welding flange and covers the PCBA board; the epoxy resin layer seals the PCBA board, the cable and the inner wall of the welding flange; the rubber ring, the pressure ring and the locking nut are also included; the inner wall of the welding flange is provided with internal threads; the rubber ring is in a hollow cylinder shape, is sleeved on the cable and is arranged above the epoxy resin layer; the compression ring is in a hollow cylindrical shape, is sleeved on the cable and is positioned above the rubber ring; the lock nut is a hollow cylinder, and the outer wall of the lock nut is provided with external threads matched with the internal threads of the inner wall of the welding flange; and the lock nut is sleeved on the pressure ring, and the inner wall of the lock nut is abutted to the outer wall of the pressure ring.
The utility model utilizes the matching of the locking nut and the welding flange to extrude the pressure ring and the rubber ring; on one hand, the cable can be ensured to be positioned in the center of the welding flange cavity; on the other hand extrudees clamping ring, rubber ring, and then extrudees the epoxy layer for rubber ring and epoxy layer paste tightly, epoxy layer and PCBA board, welding flange, cable paste tightly sealed. Therefore, the utility model is beneficial to the integral sealing performance of the product, is beneficial to the locking line centering of the cable, and is simple and convenient to disassemble and assemble.
According to the preferable technical scheme, the bottom of the rubber ring is provided with a fixing pin, and the rubber fixing pin is embedded into the epoxy resin layer; prevent the rubber ring with the epoxy resin layer drops after long-time use, is favorable to the increase of stability.
According to the preferable technical scheme, the number of the fixing feet at the bottom of the rubber ring is three, and the fixing feet are uniformly distributed on the circumference of the bottom of the rubber ring; the triangle shape has stability, and the stability between the rubber ring and the epoxy resin layer is further enhanced.
According to the preferable technical scheme, the top of the rubber ring is provided with two holes; when the rubber ring is installed on epoxy resin, air can be discharged when the rubber ring is extruded by the locking nut, so that the attaching surface is attached more compactly, and the air tightness of the part is ensured.
According to the preferable technical scheme, the outer wall of the pressure ring is provided with an inclined surface; the inner wall of the lock nut is provided with a locking surface matched with the inclined surface of the outer wall of the pressure ring; and the locking surface on the inner wall of the lock nut is abutted against the inclined surface on the outer wall of the pressing ring to lock the pressing ring.
According to the preferable technical scheme, two straight locking grooves are formed in the top of the lock nut; the installation and the replacement of parts of the product are facilitated.
Preferably, the pressing ring is an elastic element, so that deformation is facilitated, and locking of the cable is facilitated.
According to the preferable technical scheme, the pressing ring is made of stainless steel, and two grooves are formed in the bottom of the pressing ring; the clamping ring is in the screwing down of the locking nut, the groove is extruded to deform towards the middle, and the locking of the cable is facilitated.
According to the preferable technical scheme, the cable is located in the center of the hollow cavity of the welding flange; the disassembly and assembly of the sealing part and the replacement of parts are facilitated.
According to the preferable technical scheme, the thickness of the epoxy resin layer is five millimeters; avoid the wearing and tearing of PCBA board, and have waterproof, dampproofing, effectual extension the life of PCBA board. Compared with the epoxy resin layer in the prior art, the epoxy resin layer is very thin, but also has better sealing effect, and is convenient to disassemble if the PCBA is damaged and needs to be maintained.
Compared with the prior art, the utility model has the beneficial effects that:
1. utilize the inseparable laminating of rubber ring and epoxy layer, avoid the wearing and tearing of PCBA board to have waterproof, humidity resistance.
2. The locking nut is screwed tightly to apply pressure to the pressing ring, so that the bottom of the pressing ring is deformed to lock the cable; and the cable is positioned in the middle position, so that the sealing part is convenient to disassemble and assemble and the parts are convenient to replace.
3. The locking nut is screwed tightly, and pressure is applied to the rubber ring, so that the rubber ring is tightly attached to the cable, the welding flange and the epoxy resin layer, and a sealing effect is achieved.
Drawings
FIG. 1 is a schematic diagram of a prior art configuration of the present invention;
FIG. 2 is a schematic structural view of a magnetostrictive displacement sensor sealing structure according to the utility model;
FIG. 3 is a schematic view of the compression ring of the present invention;
FIG. 4 is a schematic structural view of a locking nut of the present invention;
fig. 5 is a schematic structural view of a rubber ring according to the present invention.
Detailed Description
Embodiments of the sealing structure of the magnetostrictive displacement sensor according to the present invention will be further described with reference to fig. 2 to 5.
The magnetostrictive displacement sensor sealing structure comprises an outer measuring rod 16, a welding flange 15, a PCBA board 14, an epoxy resin layer 13, a rubber ring 12, a locking nut 11, a pressure ring 10 and a cable 9; the welding flange 15 is arranged at the top of the outer measuring rod 16, the top of the outer measuring rod 16 is embedded into the hollow cavity of the welding flange 15, and the PCBA board 14 is arranged at the top of the outer measuring rod 16 and is positioned in the hollow cavity of the welding flange 15; the cable 9 is connected with the PCBA board 14; the epoxy resin layer 13 is positioned in the hollow cavity of the welding flange 15 and covers the PCBA board 14; the epoxy resin layer 13 seals the PCBA board 14 and the cable 9 with the inner wall of the welding flange 15; the inner wall of the welding flange 15 is provided with internal threads.
The rubber ring 12 is in a hollow cylindrical shape and is provided with three rubber ring fixing feet 8, a rubber ring plane 6 and two rubber ring holes 7. The rubber ring 12 is sleeved on the cable 9 and is installed above the epoxy resin layer 13. The pressing ring 10 is in a hollow cylindrical shape and is provided with a pressing ring bottom groove 2 and a pressing ring outer wall inclined plane 1, and the pressing ring 10 is sleeved on the cable 9 and is positioned above the rubber ring 12; the lock nut 11 is a hollow cylinder and is provided with a lock nut inner wall inclined plane 3 and a lock nut linear locking groove 5, and the outer wall of the lock nut 11 is provided with a lock nut outer wall external thread 4 matched with the internal thread of the inner wall of the welding flange 15; and the lock nut 11 is sleeved on the pressure ring 10, and the inner wall of the lock nut 11 is abutted to the outer wall of the pressure ring 10.
The assembly principle of the sealing structure of the magnetostrictive displacement sensor is as follows:
and connecting the top of the outer measuring rod 16 with the hollow cavity of the welding flange 15. The PCBA board 14 is then mounted on top of the outer rail 16. After the cable 12 and the PCBA 7 are connected, epoxy resin is uniformly poured on the PCBA 14, and the thickness of the epoxy resin is five millimeters, so that the epoxy resin is enough to cover the joint of the cable 9 and the PCBA 14 and cover the top of the outer measuring rod 16 and the joint of the welding flange 15.
The rubber ring 12 is sleeved on the cable 9 and is simultaneously arranged on the epoxy resin, and the rubber ring fixing pin 8 extends into the epoxy resin; waiting for the epoxy resin to cure to form an epoxy resin layer 13; the epoxy resin layer 13 can fix the rubber ring fixing pins 8 and provide waterproof and moistureproof effects for the surfaces of the PCBA boards 14 and the interfaces of the PCBA boards 14 and the cables 9;
sleeving the pressing ring 10 on the cable 9, and placing the pressing ring on the rubber ring 12;
the locking nut 11 is sleeved on the cable 9 and screwed tightly by matching external threads 4 on the outer wall of the locking nut with internal threads on the inner wall of the welding flange 15 through the locking nut linear locking groove 5; the inclined surface 3 of the inner wall of the lock nut extrudes the inclined surface 1 of the outer wall of the pressure ring; two grooves 2 are arranged below the pressing ring 10, and will deform under the screwing pressure of the locking nut 11, so as to achieve the purpose of locking the cable 9; the rubber ring plane 6 is contacted with the locking nut 11 and the bottom surface of the pressing ring 10 under the screwing pressure of the locking nut 11, and simultaneously applies pressure to the epoxy resin layer 13; air reserved in the epoxy resin layer 13 and the rubber ring 12 is exhausted from the rubber ring hole 7, so that the rubber ring 12 and the epoxy resin layer 13 are more attached;
the present invention should be considered as limited only by the preferred embodiments of the utility model, and not limited to the above embodiments, and it should be understood that any modifications, equivalents and improvements made within the spirit and principle of the utility model are included in the scope of the utility model.
Claims (10)
1. The magnetostrictive displacement sensor sealing structure comprises an outer measuring rod, a welding flange, a PCBA board, an epoxy resin layer and a cable; the welding flange is arranged at the top of the outer measuring rod, and the top of the outer measuring rod is embedded into the hollow cavity of the welding flange; the PCBA board is arranged at the top of the outer measuring rod and is positioned in the hollow cavity of the welding flange; the cable is connected with the PCBA board; the epoxy resin layer is positioned in the hollow cavity of the welding flange and covers the PCBA board; the epoxy resin layer seals the PCBA board, the cable and the inner wall of the welding flange; the method is characterized in that: the rubber ring, the pressure ring and the locking nut are also included; the inner wall of the welding flange is provided with internal threads; the rubber ring is in a hollow cylinder shape, is sleeved on the cable and is arranged above the epoxy resin layer; the compression ring is in a hollow cylindrical shape, is sleeved on the cable and is positioned above the rubber ring; the lock nut is a hollow cylinder, and the outer wall of the lock nut is provided with external threads matched with the internal threads of the inner wall of the welding flange; and the lock nut is sleeved on the pressure ring, and the inner wall of the lock nut is abutted to the outer wall of the pressure ring.
2. The magnetostrictive displacement sensor sealing structure according to claim 1, characterized in that: the bottom of the rubber ring is provided with a fixing pin, and the rubber fixing glue is embedded into the epoxy resin layer.
3. The magnetostrictive displacement sensor sealing structure according to claim 2, characterized in that: the fixed foot of rubber ring bottom is three, and the equipartition is on rubber ring bottom circumference.
4. The magnetostrictive displacement sensor sealing structure according to claim 1, characterized in that: two holes are arranged at the top of the rubber ring.
5. The magnetostrictive displacement sensor sealing structure according to claim 1, characterized in that: the outer wall of the pressure ring is provided with an inclined surface; the inner wall of the lock nut is provided with a locking surface matched with the inclined surface of the outer wall of the pressure ring; and the locking surface on the inner wall of the lock nut is abutted against the inclined surface on the outer wall of the pressing ring to lock the pressing ring.
6. The magnetostrictive displacement sensor sealing structure according to claim 1, characterized in that: two straight locking grooves are formed in the top of the lock nut.
7. The magnetostrictive displacement sensor sealing structure according to claim 1, characterized in that: the clamping ring is an elastic element.
8. The magnetostrictive displacement sensor sealing structure according to claim 7, characterized in that: the clamping ring is made of stainless steel, and two grooves are formed in the bottom of the clamping ring.
9. The magnetostrictive displacement sensor sealing structure according to claim 1, characterized in that: the cable is located at the center of the hollow cavity of the welding flange.
10. The magnetostrictive displacement sensor sealing structure according to claim 1, characterized in that: the thickness of the epoxy resin layer is five millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122610976.9U CN216283238U (en) | 2021-10-27 | 2021-10-27 | Magnetostrictive displacement sensor sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122610976.9U CN216283238U (en) | 2021-10-27 | 2021-10-27 | Magnetostrictive displacement sensor sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216283238U true CN216283238U (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122610976.9U Active CN216283238U (en) | 2021-10-27 | 2021-10-27 | Magnetostrictive displacement sensor sealing structure |
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| Country | Link |
|---|---|
| CN (1) | CN216283238U (en) |
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2021
- 2021-10-27 CN CN202122610976.9U patent/CN216283238U/en active Active
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