CN215677305U

CN215677305U - Waterproof packaging structure for high-precision temperature sensor

Info

Publication number: CN215677305U
Application number: CN202122211294.0U
Authority: CN
Inventors: 朱怡
Original assignee: Sichuan Huacan Electronic Co ltd
Current assignee: Sichuan Huacan Electronic Co ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-01-28
Anticipated expiration: 2031-09-13

Abstract

The application provides a waterproof packaging structure for high accuracy temperature sensor belongs to sensor technical field. This a waterproof packaging structure for high accuracy temperature sensor, including sensor body and waterproof encapsulation subassembly, the sensor body includes protective sleeve, wire and thermistor, waterproof encapsulation subassembly includes waterproof shell, first seal cover and second seal cover, the sealing layer includes from interior to exterior silica gel layer, epoxy layer and epoxy encapsulation bed of material and constitutes, utilizes the silica gel layer to wrap up thermistor completely sealed, recycles the epoxy layer and wraps up pin and thermistor totally sealed, uses through the cooperation of first seal cover, second seal cover and sealing ring, causes inside the unable waterproof shell that gets into of moisture, realizes multiple waterproof purpose, makes high accuracy temperature sensor have good sealed and waterproof performance.

Description

Waterproof packaging structure for high-precision temperature sensor

Technical Field

The application relates to the field of sensors, in particular to a waterproof packaging structure for a high-precision temperature sensor.

Background

The temperature sensor is a sensor which can sense temperature and convert the temperature into a usable output signal, is a core part of a temperature measuring instrument, has various varieties, can be divided into two types of contact and non-contact according to a measuring mode, and is divided into two types of thermal resistance and thermocouple according to sensor materials and electronic element characteristics.

The waterproof packaging structure of the existing high-precision temperature sensor is low in waterproof capacity, and because the temperature sensor is usually in a high-temperature and high-humidity environment, moisture easily enters the waterproof packaging structure and the inductive probe from a gap between the waterproof packaging structure and the inductive probe, so that the temperature sensor is damaged or the detection precision is reduced, and the practicability and the usability of the temperature sensor are reduced.

SUMMERY OF THE UTILITY MODEL

In order to remedy the above deficiencies, the present application provides a waterproof packaging structure for a high-precision temperature sensor, which aims to improve the problems proposed in the above-mentioned background art.

The embodiment of the application provides a waterproof packaging structure for high accuracy temperature sensor, including sensor body and waterproof packaging subassembly.

The sensor body comprises a protective sleeve, a lead and a thermistor, wherein the lead is inserted into the protective sleeve, and the thermistor is electrically connected with the extending end of the lead through a pin.

Waterproof encapsulation subassembly includes waterproof shell, first seal cover and second seal cover, waterproof shell cover is located protection sleeve one end, first seal cover with second seal cover is located waterproof shell with protection sleeve contact department, wire, pin, thermistor with space packing between the waterproof shell has a plurality of layers of sealing layer, the sealing layer includes from interior to exterior silica gel layer, epoxy layer and epoxy encapsulating material layer and constitutes.

In the above-mentioned realization in-process, it is sealed to utilize the silica gel layer to wrap up thermistor completely, it is sealed with the whole parcel of pin and thermistor to recycle the epoxy layer, temperature sensor's waterproof ability has been improved effectively, through first seal cover, the cooperation of second seal cover and sealing ring is used, can realize the high-efficient sealing connection between waterproof housing and the protective casing, cause inside the unable waterproof housing that gets into of moisture, thereby further improve waterproof housing to thermistor's in sealing performance, through setting up epoxy layer and waterproof housing, can further improve temperature sensor's waterproof ability and shock resistance, and then reach multiple waterproof purpose.

In a specific embodiment, the silicone rubber layer is wrapped and sealed outside the thermistor.

In a specific embodiment, the epoxy layer is wrapped and sealed outside the pin and the thermistor.

In the implementation process, the thermistor and the welding point between the thermistor and the pin are completely wrapped and sealed by the silica gel layer, and the pin and the thermistor are completely wrapped and sealed by the epoxy resin layer, so that the waterproof capability of the temperature sensor is effectively improved, and the thermistor is protected from being impacted by external mechanical force.

In a specific embodiment, the epoxy potting compound layer is potted between the epoxy resin layer and the waterproof housing.

In the implementation process, the epoxy resin layer and the waterproof shell are arranged, so that the waterproof capacity and the impact resistance of the temperature sensor can be further improved, and the aim of multiple waterproof is fulfilled.

In a specific implementation scheme, the first sealing sleeve is annular, and a thread ring is arranged at the contact position of the first sealing sleeve and the protective sleeve.

In a specific embodiment, the second seal cover is ring-shaped, the protective sleeve and the peripheral wall of the contact surface of the second seal cover are provided with a plurality of annular clamping grooves, sealing rings are movably clamped in the annular clamping grooves, and the sealing rings are tightly attached to the inner peripheral wall of the second seal cover.

In the implementation process, the first sealing sleeve, the second sealing sleeve and the sealing ring are matched to realize efficient sealing connection between the waterproof shell and the protective sleeve, so that moisture cannot enter the waterproof shell, and the sealing performance of the waterproof shell to the thermistor in the waterproof shell is further improved.

In a specific embodiment, an insulating tube is sleeved outside the conducting wire in the protective sleeve, and an insulating isolation layer is filled between the insulating tube and the protective sleeve.

In the implementation process, the insulating tube and the insulating isolation layer have certain heat conduction capacity, the electric insulation performance is excellent, the condition of electric leakage of the wire is effectively prevented, and the safety is improved.

In a specific embodiment, a terminal box is screwed on one end of the protective sleeve far away from the thermistor, and one end of the lead extends into the terminal box.

In a specific embodiment, a transmitter is installed in the junction box, and one end of the wire far away from the thermistor is electrically connected with the transmitter.

In a specific embodiment, terminal box one side is provided with the connector, protection sleeve one end spiro union in the connector, the terminal box opposite side still spiro union has the connector, the connector with changer electric connection.

In the implementation process, the protective sleeve is connected with the junction box conveniently and quickly, the temperature is detected through the thermistor, the temperature is conducted to the transmitter through the pins and the lead, the transmitter is used for converting the temperature signal into an output signal, and the output signal is sent to the controller through the connector lug.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic structural diagram of a waterproof packaging structure for a high-precision temperature sensor according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a sensor body according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a waterproof package assembly according to an embodiment of the present disclosure;

fig. 4 is an enlarged schematic structural diagram of a portion a in fig. 3 according to an embodiment of the present disclosure.

In the figure: 10-a sensor body; 110-protective sleeves; 111-ring card slot; 120-a wire; 130-pin; 140-a thermistor; 150-an insulating tube; 151-insulating isolation layer; 160-a junction box; 161-a connector; 162-a connector lug; 170-a transmitter; 20-a waterproof packaging assembly; 210-a waterproof housing; 220-a first gland; 230-a second gland; 240-a seal ring; 250-a sealing layer; 251-a silica gel layer; 252-a layer of epoxy resin; 253-epoxy potting compound layer.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1-4, the present application provides a waterproof package structure for a high-precision temperature sensor, which includes a sensor body 10 and a waterproof package assembly 20.

Referring to fig. 2, the sensor body 10 includes a protection sleeve 110, a wire 120 and a thermistor 140, the wire 120 is inserted into the protection sleeve 110, the wire 120 includes a wire core and a PVC sheath wrapped outside the wire core, the protection sleeve 110 can perform pressure bearing and protection functions, the thermistor 140 is electrically connected to an extending end of the wire 120 through a pin 130, two ends of the pin 130 are respectively welded or riveted to the wire cores of the thermistor 140 and the wire 120, so that the thermistor 140 can be mounted at an end of the protection sleeve 110, the thermistor 140 has a fast thermal response speed and a high temperature detection sensitivity, and thus the detection accuracy of the temperature sensor is improved.

In this embodiment, the outside cover of wire 120 in the protective sheath 110 is equipped with insulating tube 150, and it has insulating isolation layer 151 to fill between insulating tube 150 and the protective sheath 110, lives wire 120 through insulating tube 150 parcel, and insulating isolation layer 151 of rethread is kept apart, promotes electrical insulation performance, prevents wire 120 electric leakage's the condition effectively and takes place, improves the security.

In some specific embodiments, a terminal box 160 is screwed to an end of the protection sleeve 110 away from the thermistor 140, an end of the wire 120 extends into the terminal box 160, a transmitter 170 is installed in the terminal box 160, an end of the wire 120 away from the thermistor 140 is electrically connected to the transmitter 170, a connector 161 is disposed on one side of the terminal box 160, the connector 161 and the terminal box 160 are integrally formed, one end of the protection sleeve 110 is screwed to the connector 161 to facilitate quick connection of the protection sleeve 110 to the terminal box 160, a connector 162 is screwed to the other side of the terminal box 160, the connector 162 is electrically connected to the transmitter 170, the temperature is detected by the thermistor 140 and transmitted to the transmitter 170 through the pin 130 and the wire 120, the temperature signal is converted into an output signal by the transmitter 170, and the output signal is transmitted to the controller through the connector 162.

Referring to fig. 3 and 4, the waterproof package assembly 20 includes a waterproof housing 210, a first sealing sleeve 220 and a second sealing sleeve 230, the waterproof housing 210 is sleeved on one end of the protection casing 110, the waterproof housing 210 is made of stainless steel, the first sealing sleeve 220 and the second sealing sleeve 230 are sleeved on the waterproof housing 210 and the protection casing 110, a plurality of sealing layers 250 are filled in gaps between the wires 120, the pins 130, the thermistor 140 and the waterproof housing 210, when the waterproof package assembly is specifically configured, the sealing layers 250 include a silicone layer 251, an epoxy layer 252 and an epoxy potting layer 253 from inside to outside, the silicone layer 251 is wrapped and sealed outside the thermistor 140, the silicone layer 251 is used to wrap and seal the thermistor 140 and a welding point between the thermistor 140 and the pins 130 completely, and the epoxy layer 252 is used to wrap and seal the pins 130 and the thermistor 140 completely, the waterproof capability of the temperature sensor is effectively improved, meanwhile, the thermistor 140 is protected from being impacted by external mechanical force, the epoxy potting material layer 253 is potted between the epoxy resin layer 252 and the waterproof shell 210, and the waterproof capability and the impact resistance of the temperature sensor can be further improved by arranging the epoxy resin layer 252 and the waterproof shell 210, so that the aim of multiple waterproof is fulfilled.

In this embodiment, first seal cover 220 is the ring shape, first seal cover 220 is provided with the thread circle with protection sleeve 110 contact department, second seal cover 230 is the ring shape, a plurality of ring groove 111 has been seted up on the periphery wall of protection sleeve 110 and second seal cover 230 contact surface, the equal movable joint has sealing ring 240 in the ring groove 111, sealing ring 240 hugs closely in second seal cover 230 internal perisporium, through first seal cover 220, the cooperation of second seal cover 230 and sealing ring 240 is used, can realize the high-efficient sealing connection between waterproof housing 210 and the protection sleeve 110, cause inside the unable entering waterproof housing 210 of moisture, thereby further improve the sealing performance of waterproof housing 210 to thermistor 140 in it.

This a waterproof packaging structure's for high accuracy temperature sensor theory of operation: when the temperature sensor is used, the temperature is detected through the thermistor 140, the temperature is transmitted to the transmitter 170 through the pin 130 and the lead 120, the temperature signal is converted into an output signal by the transmitter 170 and is sent to a controller through the connector lug 162, the thermistor 140 and a welding point of the thermistor 140 and the pin 130 are completely wrapped and sealed through the silica gel layer 251, and then the pin 130 and the thermistor 140 are completely wrapped and sealed through the epoxy resin layer 252, so that the waterproof capacity of the temperature sensor is effectively improved, the thermistor 140 is protected from being impacted by external mechanical force, the waterproof shell 210 and the protective sleeve 110 can be efficiently sealed and connected through the matching use of the first sealing sleeve 220, the second sealing sleeve 230 and the sealing ring 240, moisture cannot enter the waterproof shell 210, the sealing performance of the waterproof shell 210 on the thermistor 140 in the waterproof shell is further improved, and by arranging the epoxy resin layer 252 and the waterproof shell 210, the waterproof capability and the shock resistance of the temperature sensor can be further improved, and the aim of multiple waterproof is further fulfilled.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A waterproof packaging structure for high accuracy temperature sensor, its characterized in that includes

The sensor comprises a sensor body (10), wherein the sensor body (10) comprises a protective sleeve (110), a lead (120) and a thermistor (140), the lead (120) is inserted into the protective sleeve (110), and the thermistor (140) is electrically connected with an extending end of the lead (120) through a pin (130);

waterproof encapsulation subassembly (20), waterproof encapsulation subassembly (20) include waterproof shell (210), first seal cover (220) and second seal cover (230), waterproof shell (210) cover is located protective casing (110) one end, first seal cover (220) with second seal cover (230) cover is located waterproof shell (210) with protective casing (110) contact department, wire (120), pin (130), thermistor (140) and space between waterproof shell (210) is filled there are a plurality of layers of sealing layer (250), sealing layer (250) include from interior to exterior silica gel layer (251), epoxy resin layer (252) and epoxy encapsulation bed of material (253) are constituteed.

2. The waterproof packaging structure for the high-precision temperature sensor is characterized in that the silicone layer (251) is wrapped and sealed outside the thermistor (140).

3. The waterproof packaging structure for the high-precision temperature sensor according to claim 1, wherein the epoxy resin layer (252) is wrapped and sealed outside the pin (130) and the thermistor (140).

4. The waterproof packaging structure for the high-precision temperature sensor according to claim 1, wherein the epoxy potting layer (253) is potted between the epoxy resin layer (252) and the waterproof housing (210).

5. The waterproof packaging structure for the high-precision temperature sensor is characterized in that the first sealing sleeve (220) is in a ring shape, and a threaded ring is arranged at the contact position of the first sealing sleeve (220) and the protective sleeve (110).

6. The waterproof packaging structure for the high-precision temperature sensor is according to claim 1, wherein the second sealing sleeve (230) is annular, the outer peripheral wall of the contact surface between the protective sleeve (110) and the second sealing sleeve (230) is provided with a plurality of annular clamping grooves (111), the annular clamping grooves (111) are movably clamped with sealing rings (240), and the sealing rings (240) are tightly attached to the inner peripheral wall of the second sealing sleeve (230).

7. The waterproof packaging structure for the high-precision temperature sensor of claim 1, wherein an insulating tube (150) is sleeved outside the conducting wire (120) in the protective sleeve (110), and an insulating isolation layer (151) is filled between the insulating tube (150) and the protective sleeve (110).

8. The waterproof packaging structure for the high-precision temperature sensor as claimed in claim 1, wherein a terminal box (160) is screwed on one end of the protective sleeve (110) far away from the thermistor (140), and one end of the lead (120) extends into the terminal box (160).

9. The waterproof packaging structure for the high-precision temperature sensor according to claim 8, wherein a transmitter (170) is installed in the junction box (160), and one end of the lead (120) far away from the thermistor (140) is electrically connected with the transmitter (170).

10. The waterproof packaging structure for the high-precision temperature sensor as claimed in claim 9, wherein a connector (161) is disposed on one side of the junction box (160), one end of the protective sleeve (110) is screwed to the connector (161), a connector (162) is screwed to the other side of the junction box (160), and the connector (162) is electrically connected to the transmitter (170).