A waterproof and high temperature resistant sensor

Abstract

The present application discloses a waterproof and high temperature resistant sensor, including a lead, a resistor element and a protective tube, wherein the resistor element is connected to the lead, and the surface of the protective tube has a groove, which seals the resistor element and the lead inside the protective tube, and also includes a protective cover, which covers the resistor element and the lead inside; and also includes a closing device, which is arranged at the tube mouth of the protective tube and seals it, and the closing device is provided with a joint through hole that allows the protective cover to pass through; the protective tube is also provided with a sealing cover, which seals and wraps the tube mouth of the protective tube. Beneficial effects of the present application: The present application discloses a waterproof and high temperature resistant sensor, which seals the resistor element as a whole inside the protective tube by adding a protective outer cover; a closing device; a groove receiving layer and other devices, so as to provide multi-layer protection for the resistor element, reduce the damage to the core device resistor element and the wiring of the sensor in a humid and high temperature environment, and increase the service life of the sensor.

Description

Technical Field

[0001] The technical field of sensors of the present application particularly relates to a waterproof and high temperature resistant sensor. Background Art

[0002] With the development of the electronic equipment industry, more and more sensors are used in it, and the requirements for the sensors' adaptability to the environment are gradually becoming more stringent. This puts higher requirements on the sensors' own ability to adapt to the environment, especially in humid and high temperature environments. Existing sensors are basically protected by steel protective tubes. Humid and high temperature environments can easily damage the sensors, resulting in a high damage rate for the sensors, thereby reducing the service life of the sensors. Summary of the invention

[0003] In order to improve the defect of low service life of the sensor, the present application provides a waterproof and high temperature resistant sensor.

[0004] The waterproof and high temperature resistant sensor provided in this application adopts the following technical solution:

[0005] A waterproof and high temperature resistant sensor comprises a lead, a resistor element and a protective tube, wherein the resistor element is connected to the lead, and the surface of the protective tube has a pressed groove, wherein the pressed groove seals the resistor element and the lead inside the protective tube, and further comprises a protective cover, wherein the protective cover covers the resistor element and the lead inside; further comprises a sealing device, wherein the sealing device is arranged at the tube mouth of the protective tube and seals it, and the sealing device is provided with a joint through hole through which the protective cover can pass; the protective tube is also provided with a sealing cover, wherein the sealing cover seals and wraps the tube mouth of the protective tube.

[0006] By adopting the above technical solution, adding a protective cover, a closing device, and a sealing cover, the sensor first uses the protective cover to provide a first layer of protection for the resistor element and the lead wire, and at the same time, the protective cover is passed through the joint through the closing device into the protective tube, and the closing device performs a second layer of protection to form an enclosed space, and finally the sealing cover performs the outermost sealing, thereby forming a multi-layer isolation measure, which can fully isolate the sensor from damage caused by changes in the harsh external environment during use, thereby increasing the service life of the sensor.

[0007] Further: the protective cover includes a lead cover, a protective inner cover and a protective outer cover, the lead cover covers the resistor element and the lead connection point; the protective inner cover covers the lead cover and the resistor element; the protective outer cover covers the lead cover and the protective inner cover.

[0008] By adopting the above technical solution, the protective cover is divided into multiple layers. The innermost lead cover protects the connection point between the resistor element and the lead, and the protective inner cover further protects the lead cover and the resistor element. Finally, the protective outer cover once again covers the lead cover and the protective inner cover as a whole to form the outermost layer of protection. The three layers of protection finally form a protective cover as a whole to provide strict protection for the leads and the resistor element.

[0009] Further: the closing device is located inside the protection tube, and the outer diameter of the closing device matches the inner diameter of the protection tube.

[0010] By adopting the above technical solution, the sealing device is inside the protection tube, and the protection device is inserted into the protection tube as a whole, so that a protection cavity that can accommodate the resistance element and the protection cover is formed inside the protection tube.

[0011] Further: the sealing device is located at the groove on the surface of the protection tube, and the outer surface of the sealing device is provided with a groove receiving layer.

[0012] By adopting the above technical scheme, the grooves are directly applied to the groove receiving layer during the punching and grooving operation, thereby protecting the leads and other wires from being squeezed and damaged. During use, the leads and other wires are also prevented from rubbing against the grooves and causing damage to the leads and other wires.

[0013] Further: the closing device includes a closing card and a snap-fit ​​joint, the closing card is provided with a joint accommodating cavity, the snap-fit ​​joint matches the joint accommodating cavity, the joint through hole passes through the closing card and the joint accommodating cavity, the edge of the joint accommodating cavity has a limiting cavity; the snap-fit ​​joint has a limiting block matching the limiting cavity.

[0014] By adopting the above technical solution, the connector accommodating cavity on the closed card can enable the snap-fit ​​connector to be directly inserted and connected, while the limiting cavity and the matching limiting block can further increase the limiting effect. The closing device is divided into a closing card and a snap-fit ​​connector, which is also convenient for the installation of the closing device and electrical components when the sensor is produced as a whole.

[0015] Further: a plurality of contact protrusions are provided on the surface of the sealing device close to the protective cover.

[0016] By adopting the above technical solution, when the sealing operation is performed in the protective tube, the contact protrusion can increase the contact area between the sealing card and the sealing glue, making the sealing effect obvious, especially preventing the sealing glue from cracking and causing the sealing device to fall off during long-term use.

[0017] Further: a connecting piece is provided on the surface of the closing device close to the protective cover, and a connecting base matching the diameter of the protective tube is provided on the end of the connecting piece away from the closing clamp, and a protective cover accommodating cavity is provided on the connecting base.

[0018] By adopting the above technical solution, this connection method can replace the fixing effect of the sealing glue. The base is connected to the clamp through the connecting piece to make it a whole, which can be directly inserted into the protective tube, so that the tube wall is clamped by the matching connecting base to stabilize the whole. At the same time, the protective cover accommodating cavity can extend the resistor element covered by the protective cover into the interior to stabilize the resistor element.

[0019] Further: an anti-slip connecting plate is provided on the surface of the closing device close to the protective cover, an anti-slip connecting plate is provided on the outer side of the end of the anti-slip connecting plate, and the anti-slip connecting plate is elastic.

[0020] By adopting the above technical solution, this type of connection can also replace the fixing effect of the sealing glue. Through the elastic characteristics of the connecting plate with elastic anti-slip parts, when the closing device is plugged in, the elastic anti-slip parts and the anti-slip parts at the ends are directly inserted into the protective tube. The elastic restoring force of the connecting plate with its own elastic anti-slip parts and the anti-slip parts at the connection with the tube wall increase the contact friction, so that the closing device is fixed.

[0021] Further: the protective inner cover, the protective outer cover and the sealing cover are made of heat shrinkable materials.

[0022] By adopting the above technical solution, the protective inner cover and the protective outer cover can be heat-shrunk after being assembled, so that the edges of the protective inner cover and the protective outer cover can be shrunk and the whole can be shrunk to better seal, and the outermost sealing cover can be heat-shrunk after being assembled to further seal the protective pipe opening closed by the sealing device.

[0023] To sum up, the beneficial effects of the present application are as follows: the present application is a waterproof and high-temperature resistant sensor, which, by adding a protective outer cover, a sealing device, a groove receiving layer and other devices, seals the resistance element as a whole and places it inside a protective tube, provides multi-layer protection for the resistance element, reduces the damage to the core device resistance element and wiring of the sensor in a humid and high-temperature environment, and increases the service life of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of a finished installation product of a waterproof and high temperature resistant sensor;

[0025] Figure 2 This is an exploded view of the waterproof and high temperature resistant sensor in Example 1;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the closing clamp and the clamping joint of the closing device of the waterproof and high temperature resistant sensor in the first embodiment;

[0027] Figure 4It is a schematic diagram of the three-dimensional structure of the contact protrusion on the closing clamp of the closing device of the waterproof and high temperature resistant sensor in the first embodiment;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of the sealing device of the waterproof and high temperature resistant sensor in the second embodiment;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the sealing device of the waterproof and high temperature resistant sensor in Example 3.

[0030] In the figure: 1. lead; 2. resistor element; 3. protective cover; 31. lead cover; 32. protective inner cover; 33. protective outer cover; 4. closing device; 41. closing clamp; 412. groove receiving layer; 42. snap joint; 421. limit block; 422. joint through hole; 43. joint accommodating cavity; 431. limit cavity; 44. contact protrusion; 45. connector; 46. connecting base; 47. protective cover accommodating cavity; 48. anti-slip member connecting plate; 49. anti-slip member; 5. protective tube; 51. groove; 6. sealing cover. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by this application easy to understand, this application is further explained below in conjunction with specific implementation methods.

[0032] Example 1

[0033] like Figure 1 and Figure 2 As shown, one embodiment of a waterproof and high-temperature resistant sensor of the present application includes a lead 1, a resistor element 2 and a protective tube 5, wherein the resistor element 2 is connected to the lead 1, and a surface of the protective tube 5 has a pressed groove 51, and the pressed groove 51 seals the resistor element 2 and the lead 1 in the protective tube 5, and also includes a protective cover 3, and the protective cover 3 covers the resistor element 2 and the lead 1 inside; it also includes a closing device 4, which is arranged at the pipe mouth of the protective tube 5 and seals it, and the closing device 4 is provided with a joint through hole 422 that allows the protective cover 3 to pass through; the protective tube 5 is also provided with a sealing cover 6, and the sealing cover 6 seals and wraps the pipe mouth of the protective tube 5.

[0034] The closing device 4 is located in the protection tube 5 , and the outer diameter of the closing device 4 matches the inner diameter of the protection tube 5 .

[0035] The closing device 4 is located at the depression 51 on the surface of the protection tube 5 , and a depression receiving layer 412 is provided on the outer surface of the closing device 4 .

[0036] The protective cover 3 includes a lead cover 31, a protective inner cover 32 and a protective outer cover 33. The lead cover 31 covers the connection point between the resistor element 2 and the lead 1; the protective inner cover 32 covers the lead cover 31 and the resistor element 2; and the protective outer cover 33 covers the lead cover 31 and the protective inner cover 32.

[0037] The protective inner cover 32, the protective outer cover 33 and the sealing cover 6 are made of heat shrinkable materials.

[0038] like Figure 3 As shown, the closing device 4 includes a closing card 41 and a snap-fit ​​joint 42, the closing card 41 is provided with a joint accommodating cavity 43, the snap-fit ​​joint 42 matches the joint accommodating cavity 43, the joint through hole 422 passes through the closing card 41 and the joint accommodating cavity 43, the edge of the joint accommodating cavity 43 has a limiting cavity 431; the snap-fit ​​joint 42 has a limiting block 421 matching the limiting cavity 431.

[0039] like Figure 4 As shown, a plurality of contact protrusions 44 are provided on the surface of the closing device 4 close to the protective cover 3 .

[0040] The principle process is as follows: the lead wire 1 is inserted into the lead wire cover 31, and then the lead wire 1 is connected to the resistor element 2, and then the lead wire cover 31 covers the connection point between the lead wire 1 and the resistor element 2, and the protective inner cover 32 covers the lead wire cover 31 and the resistor element 2 to form a further protective layer, and then the protective outer cover 33 covers the protective inner cover 32 and the exposed part of the lead wire to form the outermost layer; since the protective inner cover 32 and the protective outer cover 33 are heat-shrinkable materials, the electronic component covered by the protective cover 3 can be heat-shrinkable as a whole. The electronic component covered by the protective cover 3 is compressed to make the electronic component as a whole more tightly sealed; then the whole is passed through the joint through hole 422 on the snap joint 42 in the closing device 4, and then the snap joint 42 is inserted into the joint accommodating cavity 43 through the matching limit block 421 and the limit cavity 431, and then the protective cover 3 is extended into the protective tube, and finally the closing device 4 is inserted into the protective tube 5, and then the snap joint 42 can be pulled up by plugging and pulling out the snap joint 42, and then the sealing glue is put into the joint through hole 422, and then After that, the snap-fit ​​connector 42 is inserted back into the connector accommodating cavity 43. Before installing the closing device 4, the protective tube 5 can also be filled with sealing glue and then the electronic component covered by the protective cover 3 can be inserted into it as a whole. Then, when the closing device 4 is installed and the sealing glue solidifies, the snap-fit ​​connector 42 contacts the sealing glue protrusion 44 to increase the contact area, making the sealing effect more significant. Then, the outer part of the protective tube 5 corresponding to the groove receiving layer 412 on the closing device 4 in the protective tube 5 is punched to form a groove 51. During the punching, the protective tube 5 directly acts on the groove receiving layer 412 to protect the lead wire and other wires from being squeezed and damaged. In addition, during use, it also prevents the lead wire and other wires from directly rubbing against the groove to cause damage to the lead wire and other wires. Then, the exposed part of the pipe mouth of the protective tube 5 is sealed with glue. Finally, the outermost sealing cover 6 covers the pipe mouth of the sealed protective tube 5 or the protective tube 5 is sealed as a whole. Then, the sealing cover 6 is thermoplasticized so that the sealing cover 6 shrinks and wraps the pipe mouth of the protective tube 5 or the protective tube 5 is sealed as a whole.

[0041] Example 2

[0042] The lead wire 1, resistor element 2, protective cover 3, protective tube 5 and sealing cover 6 included in this embodiment are the same as those in the first embodiment and are not described in detail here. The difference between this embodiment and the first embodiment is the sealing device 4.

[0043] like Figure 5 As shown, a connecting member 45 is provided on the surface of the closing clamp 41 in the closing device 4 in this embodiment opposite to the snap joint 42, and a connecting base 46 matching the diameter of the protective tube 5 is provided on the end of the connecting member 45 away from the closing clamp 41, and a protective cover accommodating cavity 47 is provided on the connecting base 46.

[0044] The working principle process is as follows: the working principle process of the lead 1 and the protective cover 3 is the same as that of the embodiment 1, and will not be repeated here. When the closing device 4 is inserted into the protective tube 5, the connecting member closing card 41 is connected to the connecting base 46 matching the diameter of the protective tube 5 through the connecting member 45, so that it can be directly inserted into the protective tube 5 as a whole, so that the tube wall is clamped by the matching connecting base 46 to stabilize the whole. At the same time, the protective cover accommodating cavity 47 can extend the resistor element covered by the protective cover as a whole into the interior thereof. The protective cover accommodating cavity 47 can stabilize the resistor element without injecting sealant into the protective tube 5. Finally, the outer part of the protective tube 5 corresponding to the groove receiving layer 412 on the closing device 4 in the protective tube 5 is stamped to form a groove 51, and the subsequent operations are the same as those in the embodiment.

[0045] Example 3

[0046] The lead wire 1, resistor element 2, protective cover 3, protective tube 5 and sealing cover 6 included in this embodiment are the same as those in the other two embodiments and will not be described in detail here. The difference between this embodiment and the other two embodiments is the sealing device 4.

[0047] like Figure 6 As shown, the surface of the closing clamp 41 opposite to the clamping joint 42 is provided with an anti-slip member connecting plate 48, and an anti-slip member 49 is provided on the outer side of the end of the anti-slip member connecting plate 48, and the anti-slip member connecting plate 48 is elastic.

[0048] The working principle process is as follows: the working principle process of the lead 1 and the protective cover 3 is the same as that of the other two embodiments, and will not be repeated here. When the closing device 4 is inserted into the protective tube 5, through the elastic characteristics of the elastic anti-slip part connecting plate 48, when the closing device 4 is plugged into the protective tube 5, the elastic anti-slip part 48 and the outer anti-slip part 49 at the end are directly extended into the protective tube, and the tube wall squeezes the anti-slip part 49 and the elastic anti-slip part 48 connected thereto. Through the elastic restoring force characteristics of the anti-slip part connecting plate 48 and the larger contact area of ​​the anti-slip part 49 at the junction of the tube wall, the contact friction is increased, so that the closing device 4 is fixed in the protective tube 5. At this time, the protective cover accommodating cavity 47 can stabilize the resistor element without injecting sealant into the protective tube 5. Finally, the outer part of the protective tube 5 corresponding to the groove receiving layer 412 on the closing device 4 in the protective tube 5 is stamped to form a groove 51, and the subsequent operations are the same as the other two embodiments.

[0049] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present application is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A waterproof and high temperature resistant sensor, comprising a lead wire (1), a resistor element (2) and a protective tube (5), wherein the resistor element (2) is connected to the lead wire (1), and the protective tube (5) has a pressed groove (51) on its surface, wherein the pressed groove (51) seals the resistor element (2) and the lead wire (1) in the protective tube (5), characterized in that: The device further comprises a protective cover (3), wherein the protective cover (3) covers the resistor element (2) and the lead wire (1) inside; and a sealing device (4), wherein the sealing device (4) is arranged at the tube mouth of the protective tube (5) and seals the tube mouth thereof, wherein the sealing device (4) is provided with a joint through hole (422) through which the protective cover (3) can pass; and the protective tube (5) is further provided with a sealing cover (6), wherein the sealing cover (6) seals and wraps the tube mouth of the protective tube (5); The closing device (4) is located inside the protective tube (5), and the outer diameter of the closing device (4) matches the inner diameter of the protective tube (5); The closing device (4) comprises a closing clamp (41) and a snap-fit ​​joint (42); the closing clamp (41) is provided with a joint accommodating cavity (43); the snap-fit ​​joint (42) matches the joint accommodating cavity (43); the joint through hole (422) passes through the closing clamp (41) and the joint accommodating cavity (43); the edge of the joint accommodating cavity (43) has a limiting cavity (431); the snap-fit ​​joint (42) has a limiting block (421) matching the limiting cavity (431); The protective cover (3) comprises a lead cover (31), a protective inner cover (32) and a protective outer cover (33); the lead cover (31) covers the connection point between the resistor element (2) and the lead wire (1); the protective inner cover (32) covers the lead cover (31) and the resistor element (2); and the protective outer cover (33) covers the lead cover (31) and the protective inner cover (32); The protective inner cover (32), the protective outer cover (33) and the sealing cover (6) are made of heat-shrinkable materials; The sealing device (4) is located at the groove (51) on the surface of the protection tube (5), and the outer surface of the sealing device (4) is provided with a groove receiving layer (412); The waterproof and high temperature resistant sensor further comprises: an anti-slip member connecting plate (48) is provided on the surface of the closing device (4) close to the protective cover (3); an anti-slip member (49) is provided on the outer side of the end of the anti-slip member connecting plate (48); and the anti-slip member connecting plate (48) is elastic.

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