Microsensor

Abstract

The utility model discloses a micro sensor belongs to sensor technical field. A micro sensor, including the shell, the top of shell is established as the glue pouring cavity, and the side of shell is close to the glue pouring cavity is equipped with the convenient dismantling subassembly for sealing glue, and the convenient dismantling subassembly includes the plug-in interface and the sealing cap, is equipped with the joint piece on the sealing cap, and the joint piece is used for connecting sealing glue, the convenient dismantling subassembly includes the plug-in interface and the sealing cap, and the plug-in interface is set up on the shell upper portion, and the shell upper portion is equipped with the first outer thread, and the inboard of sealing cap is equipped with the first internal thread, the utility model discloses the structure cooperation of plug-in interface and sealing cap has realized the maintainability of sensor after glue pouring. When needing to repair, can through the lifting of the solidified colloid of plugboard, makes the colloid whole to take out, or through the tool and breaks the colloid, and the fragment is taken out through the plug-in interface and the top of shell, avoided the problem that traditional glue pouring sensor must be replaced as a whole, and the maintenance cost is reduced greatly.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a miniature sensor. Background Technology

[0002] In flammable and explosive environments such as industrial automation, petrochemicals, and coal mining, magnetic sensors serve as critical safety monitoring components, and their explosion-proof performance is of paramount importance. Currently, explosion-proof magnetic sensors generally employ a potting process, which uses materials such as epoxy resin, polyurethane, or silicone to completely seal the internal circuitry to meet explosion-proof standards.

[0003] After potting, the internal components of the sensor are encapsulated by the cured adhesive. If the sensor malfunctions, the presence of the adhesive makes the sensor difficult to repair, usually requiring the entire sensor to be replaced, resulting in high maintenance costs. Utility Model Content

[0004] The purpose of this invention is to solve the problems of difficult maintenance and high maintenance costs of microsensors after colloid potting in the prior art, and to propose a microsensor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A miniature sensor includes a housing, the top of which is configured as a potting cavity, and a removable component for sealing adhesive is provided on the side of the housing near the potting cavity.

[0007] The easy-to-disassemble component includes a plug-in interface and a sealing cap. The sealing cap is provided with a snap-fit ​​element for connecting sealant.

[0008] In some embodiments, the easy-to-disassemble component includes a connector and a sealing cap. The connector is located on the upper part of the housing. The upper part of the housing has a first external thread, and the inner side of the sealing cap has a first internal thread. The first external thread and the first internal thread are used for connecting or disconnecting the sealing cap from the housing.

[0009] In some embodiments, a high-temperature resistant sealing ring is provided between the first internal thread and the first external thread, and the high-temperature resistant sealing ring is made of fluororubber.

[0010] In some embodiments, the snap-fit ​​component is located at the lower part of the sealing cap. The snap-fit ​​component includes a mating interface, which is connected to the inside of the mating interface. A lifting groove is provided inside the mating interface, and a lifting plate is provided inside the lifting groove. The lifting groove is used for the lifting plate to move up and down.

[0011] In some embodiments, the lifting plate has a fixed cylinder in the middle, and an insert plate is slidably connected to the middle of the fixed cylinder. The insert plate passes through the fixed cylinder, and a movable groove is opened inside the fixed cylinder. The insert plate has a sliding plate, which slides in cooperation with the movable groove. The insert plate is correspondingly engaged with the insertion interface.

[0012] In some embodiments, the insert plate is located inside the colloid within the potting cavity, and is used to form openings on the colloid to accommodate the insert plate.

[0013] In some embodiments, the sealing cap has an elastic sealing gasket on the inner side of its top, and the sealing gasket has an injection hole in the middle. The sealing gasket is used to squeeze out air when the adhesive is injected.

[0014] In some embodiments, the sealing cap has a cover plate at the top, an internal thread is provided on the inner side of the top of the sealing cap, and an external threaded ring is provided at the bottom of the cover plate. The external threaded ring and the internal thread are threaded together for the installation of the cover plate.

[0015] In some embodiments, a post is provided in the middle of the lower surface of the cover plate, and the diameter of the post corresponds to the inner diameter of the glue injection hole, which is used to insert the cover plate into the glue injection hole for sealing during installation.

[0016] In some embodiments, the upper surface of the sealing cap is provided with a sealing groove, and the lower surface of the cover plate is provided with a sealing ring, the sealing ring and the sealing groove being connected to form a sealing structure.

[0017] Compared with the prior art, the present invention provides a miniature sensor with the following advantages.

[0018] 1. This utility model achieves maintainability of the sensor after potting by using the interlocking interface and sealing cap. When maintenance is required, the cured adhesive can be lifted by the interlocking plate to remove the entire adhesive, or the adhesive can be broken up with tools and the fragments can be removed through the interlocking interface and the top of the housing. This avoids the problem of traditional potted sensors having to be replaced entirely, and significantly reduces maintenance costs.

[0019] 2. This utility model achieves multiple seals for the miniature sensor through the sealing ring at the connection between the outer shell and the sealing cap, the protection of the insertion plate and the insertion interface, and the sealing connection of the sealing groove and the sealing ring. This ensures the sealing performance during critical processes and after curing, thereby meeting the requirements of explosion-proof standards for spark isolation and gas penetration.

[0020] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the top structure of the miniature sensor of this utility model.

[0022] Figure 2 This is a schematic diagram of the front view of the miniature sensor of this utility model.

[0023] Figure 3 This is a top view of the structure of the miniature sensor of this utility model.

[0024] Figure 4 This is a three-dimensional structural diagram of the miniature sensor of this utility model.

[0025] Figure 5 This is a structural schematic diagram of the easy-to-disassemble component of this utility model.

[0026] Figure 6 This is a schematic diagram of the structure of the snap-fit ​​component of this utility model.

[0027] Figure 7 This is a schematic diagram of the connection between the fixed cylinder and the insert plate of this utility model.

[0028] Figure 8 This utility model Figure 7 Enlarged structural diagram of area A in the middle.

[0029] Figure 9 This is a schematic diagram of the structure of the sealing gasket and cover plate of this utility model.

[0030] Figure 10 This is a schematic diagram of the bottom structure of the cover plate of this utility model.

[0031] Figure 11 This is a schematic diagram of the connection between the outer shell, sealing cap, and cover plate of this utility model.

[0032] In the picture:

[0033] 1. Outer shell; 101. Glue filling cavity; 102. First external thread; 103. Insertion interface; 2. Sealing cap; 201. Connecting interface; 202. Lifting groove; 203. Lifting plate; 204. Fixed cylinder; 2041. Movable groove; 205. Insert plate; 2051. Sliding plate; 206. First internal thread; 3. Sealing gasket; 301. Glue injection hole; 4. Cover plate; 401. Internal thread; 402. Sealing groove; 403. External thread ring; 404. Sealing ring; 405. Insertion post. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0035] Reference Figure 1-8 A miniature sensor includes a housing 1, the top of the housing 1 is configured as a potting cavity 101, and a removable component for sealant is provided on the side of the housing 1 near the potting cavity 101.

[0036] As one embodiment of the easy-to-disassemble component, the easy-to-disassemble component includes a plug-in interface 103 and a sealing cap 2;

[0037] The insertion interface 103 is located on the upper part of the outer shell 1. The upper part of the outer shell 1 is also provided with a first external thread 102, and the inner side of the sealing cap 2 is provided with a first internal thread 206. The sealing cap 2 and the outer shell 1 are threadedly connected by the first external thread 102 and the first internal thread 206. A high-temperature resistant sealing ring, which can be made of fluororubber, can be added between the first internal thread 206 and the first external thread 102.

[0038] Furthermore, the lower part of the sealing cap 2 is provided with a snap-fit ​​component. As one embodiment of the snap-fit ​​component, the snap-fit ​​component includes a mating interface 201, which is open inside and out. A lifting groove 202 is provided inside the mating interface 201, and a lifting plate 203 is provided inside the lifting groove 202. A fixing cylinder 204 is provided in the middle of the lifting plate 203, and an insert plate 205 is slidably connected in the middle of the fixing cylinder 204. The insert plate 205 passes through the fixing cylinder 204.

[0039] The fixed cylinder 204 has an internal movable groove 2041, and the insert plate 205 has a sliding plate 2051. The sliding plate 2051 slides with the movable groove 2041, and the insert plate 205 corresponds to the insertion interface 103.

[0040] In use, the sealing cap 2 is pre-fitted downward through the top of the outer shell 1. After the first internal thread 206 contacts the first external thread 102, the sealing cap 2 and the outer shell 1 are connected and fixed by screwing the sealing cap 2. During this process, the insert plate 205 in the fixed cylinder 204 first moves away from the center of the sealing cap 2 under the sliding cooperation of the sliding plate 2051 and the movable groove 2041, so that the end face of the insert plate 205 inside the sealing cap 2 coincides with the inner wall of the sealing cap 2, thereby making the sealing cap 2 smoothly fitted with the outer shell 1.

[0041] After the sealing cap 2 and the outer shell 1 are fitted together, when the sealing cap 2 is screwed down to the bottom, the insertion plate 205 is aligned with the bottom of the insertion interface 103. At this time, the insertion plate 205 is pushed inward to the bottom. The insertion plate 205 drives the sliding plate 2051 to move from one end of the movable groove 2041 to the other end. Then, the glue is poured into the glue filling chamber 101 through the top of the outer shell 1. When the glue is poured inward, the lifting plate 203 prevents the glue from leaking outward through the insertion interface 103 and the interface 201.

[0042] After the colloid is poured in, the extension of the insert plate 205 located in the colloid filling cavity 101 is inside the colloid.

[0043] Once the colloid has fully cured, the sealing cap 2 remains on the outer shell 1, while the insert plate 205 remains inside the colloid. The lifting plate 203, the fixing cylinder 204, and the insert plate 205 provide protection for the colloid inside the outer shell 1.

[0044] Alternatively, depending on the application, the insert plate 205 can be removed from the sealing cap 2 to the bottom, leaving an opening in the adhesive that matches the specifications of the insert plate 205. Then, the sealing cap 2 is screwed upwards through the first internal thread 206 and the first external thread 102, causing the sealing cap 2 to detach from the outer shell 1. At this point, the potting cavity 101 is completely filled, and the adhesive covers all circuits, preventing spark leakage or gas infiltration, thus meeting explosion-proof requirements.

[0045] When the miniature sensor requires maintenance, the sealing cap 2 is reinstalled with the outer shell 1, and the insert plate 205 is aligned with the insertion interface 103. Simultaneously, the insert plate 205 aligns with the opening left on the adhesive. The insert plate 205 is pushed inwards to the bottom, engaging with the opening. Then, with the sliding cooperation of the lifting plate 203 and the lifting groove 202, the insert plate 205 is lifted upwards. For thinner adhesives poured into the dispensing cavity 101, the insert plate 205 moves the adhesive upwards, causing it to detach from the outer shell 1. After the adhesive loosens within the outer shell 1, the insert plate 205 is pulled outwards again and then twisted upwards to detach from the outer shell 1, removing the adhesive from the inlet of the dispensing cavity 101.

[0046] If the cured adhesive inside the outer shell 1 is thick, the upward lifting of the insert plate 205 is insufficient to completely separate the adhesive from the outer shell 1. Therefore, before injecting more adhesive into the glue filling cavity 101, a larger size outer shell 1 with a mating interface 201 should be selected in advance.

[0047] When the miniature sensor requires maintenance, if the colloid cannot be lifted and detached from the housing 1 by the insert plate 205, then after the sealing cap 2 is removed from the housing 1, the large-sized interface 201 is used as the discharge channel. Tools such as tweezers or hooks are used to break up the colloid inside the housing 1, and the broken colloid fragments are discharged outwards through the interface 201, thus completing the removal of the thick colloid. After the colloid is cleaned, the miniature sensor is inspected and maintained.

[0048] Example 2

[0049] like Figure 1-11As shown, as an optional solution in the above embodiment, a sealing gasket 3 can be provided on the inner side of the top of the sealing cap 2. The sealing gasket 3 has an injection hole 301 in its center. After the sealing cap 2 is connected to the outer shell 1, the adhesive is injected into the outer shell 1 through the injection hole 301. The sealing gasket is elastic; during the adhesive injection process, the air inside the outer shell 1 is expelled through the injection hole 301 by squeezing and deforming the sealing gasket until the adhesive adheres tightly to the lower surface of the sealing gasket 3, at which point the adhesive injection is complete. This method can reduce or avoid air bubble residue inside the outer shell 1.

[0050] Furthermore, a cover plate 4 can be provided on the top of the sealing cap 2. An internal thread 401 is provided on the inner side of the top of the sealing cap 2, and an external threaded ring 403 is provided at the bottom of the cover plate 4. The external threaded ring 403 corresponds to and engages with the internal thread 401 on the top of the sealing cap 2. The cover plate 4 is installed on the top of the sealing cap 2 through the engagement of the external threaded ring 403 and the internal thread 401. The cover plate 4 seals the top of the sealing cap 2, preventing the intrusion of external explosive gases.

[0051] The cover plate 4 has a post 405 in the middle of its lower surface. The diameter of the post 405 corresponds to the inner diameter of the glue injection hole 301. When the cover plate 4 is threadedly connected to the sealing cap 2, the post 405 is inserted into the glue injection hole 301 to prevent glue or gas from leaking out through the glue injection hole 301.

[0052] The upper surface of the sealing cap 2 is provided with a sealing groove 402, and the lower surface of the cover plate 4 is provided with a sealing ring 404 that corresponds to and cooperates with the sealing groove 402. When the cover plate 4 and the sealing cap 2 are threadedly connected, the sealing ring 404 and the sealing groove 402 are mated and sealed, thereby improving the sealing performance of the sealing cap 2 and the cover plate 4.

[0053] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A miniature sensor, comprising a housing (1), characterized in that, The top of the outer shell (1) is provided as a glue-filling cavity (101), and a removable component for sealant is provided on the side of the outer shell (1) near the glue-filling cavity (101). The easy-to-disassemble assembly includes a plug-in interface (103) and a sealing cap (2), the sealing cap (2) being provided with a snap-fit ​​element for connecting sealant.

2. The miniature sensor according to claim 1, characterized in that, The insertion interface (103) is located on the upper part of the outer shell (1). The upper part of the outer shell (1) is provided with a first external thread (102), and the inner side of the sealing cap (2) is provided with a first internal thread (206). The first external thread (102) and the first internal thread (206) are used for connecting or disconnecting the sealing cap (2) and the outer shell (1).

3. The miniature sensor according to claim 2, characterized in that, A high-temperature resistant sealing ring is provided between the first internal thread (206) and the first external thread (102), and the high-temperature resistant sealing ring is made of fluororubber.

4. The miniature sensor according to claim 3, characterized in that, The snap-fit ​​component is located at the lower part of the sealing cap (2). The snap-fit ​​component includes a mating interface (201). The mating interface (201) is open inside and out. A lifting groove (202) is provided inside the mating interface (201). A lifting plate (203) is provided inside the lifting groove (202). The lifting groove (202) is used for the lifting plate (203) to move up and down.

5. The miniature sensor according to claim 4, characterized in that, The lifting plate (203) has a fixed cylinder (204) in the middle, and a plug plate (205) is slidably connected to the middle of the fixed cylinder (204). The plug plate (205) passes through the fixed cylinder (204). A movable groove (2041) is opened inside the fixed cylinder (204). A sliding plate (2051) is provided on the plug plate (205). The sliding plate (2051) is slidably engaged with the movable groove (2041). The plug plate (205) is correspondingly engaged with the plug interface (103).

6. The miniature sensor according to claim 5, characterized in that, The insert plate (205) is located inside the glue in the glue filling cavity (101) and is used to form an opening on the glue to fit the insert plate (205).

7. The miniature sensor according to any one of claims 1-6, characterized in that, The sealing cap (2) has an elastic sealing gasket (3) on the inner side of its top. The sealing gasket (3) has an injection hole (301) in the middle. The sealing gasket (3) is used to squeeze out air when the colloid is injected.

8. The miniature sensor according to claim 7, characterized in that, The top of the sealing cap (2) is provided with a cover plate (4), and the inner side of the top of the sealing cap (2) is provided with an internal thread (401). The bottom of the cover plate (4) is provided with an external thread ring (403). The external thread ring (403) and the internal thread (401) are threaded together for the installation of the cover plate (4).

9. The miniature sensor according to claim 8, characterized in that, The lower surface of the cover plate (4) is provided with a post (405) in the middle. The diameter of the post (405) corresponds to the inner diameter of the glue injection hole (301) and is used to insert the cover plate (4) into the glue injection hole (301) for sealing during installation.

10. The miniature sensor according to claim 9, characterized in that, The sealing cap (2) has a sealing groove (402) on its upper surface and a sealing ring (404) on its lower surface. The sealing ring (404) and the sealing groove (402) are connected to form a sealing structure.

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