Sensor protection method

Abstract

The invention relates to a sensor protection method, which comprises the following steps of S1, inserting a detection end of a sensor into a protection shell, so that the detection end of the sensor is fixed with the protection shell; s2, placing a protective shell between the two cables; s3, the protective shell and the two cables are connected with a first module of the injection mold in a clamped mode, and the protective shell is located in an injection molding groove of the first module; s4, a second module of the injection mold is connected with the first module in a clamped mode; s5, injection molding is conducted on the injection mold, and an injection molding material is poured into an injection molding cavity of the injection mold; and S6, after the injection molding material is cooled and fixed, a protective sleeve wrapping the protective shell and the cable is formed, and the cable and the protective sleeve are separated from the injection mold. According to the sensor protection method, the anti-pressure capability of the detection end of the sensor can be improved.

Description

Technical Field

[0001] This invention relates to the field of protection methods, and more particularly to a sensor protection method. Background Technology

[0002] NTC temperature sensors are thermistors commonly used for temperature detection in electrical equipment. Cables in electrical cabinets generate heat during operation. Excessive temperatures can cause rapid aging of the cable insulation, potentially leading to serious consequences such as fires. Therefore, temperature sensors are needed to monitor cable temperatures in real time. The sensing end of an NTC temperature sensor is oval-shaped. To prevent damage from compression during installation and maintenance of the electrical cabinet, a protective structure is required. Current protection methods involve wrapping the sensing end with heat-shrink tubing. However, this method has poor pressure resistance, making the sensing end susceptible to damage. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a sensor protection method that can improve the pressure resistance of the sensor detection end.

[0004] To solve the above-mentioned technical problems, the present invention provides a sensor protection method, comprising the following steps: S1: inserting the sensor's detection end into the protective shell to fix the sensor's detection end to the protective shell; S2: placing the protective shell between two cables; S3: snapping the protective shell and the two cables into the first module of the injection mold, so that the protective shell is located in the injection groove of the first module; S4: snapping the second module of the injection mold into the first module; S5: performing injection molding on the injection mold to pour the injection material into the injection cavity of the injection mold; S6: after the injection material cools and solidifies, it forms a protective sleeve covering the protective shell and cables, and the cables and protective sleeve are detached from the injection mold.

[0005] In one embodiment of the present invention, step S1 further includes a potting step, wherein after inserting the detection end of the sensor into the protective shell, potting is performed inside the protective shell.

[0006] In one embodiment of the present invention, in step S1, the protective shell has an arc-shaped groove on the opposite side, and in step S2, the cable is attached to the side wall of the groove.

[0007] In one embodiment of the present invention, the first module is provided with a protrusion, and the protrusion is provided with two slots for accommodating the cable.

[0008] In one embodiment of the present invention, the injection groove is located on the protrusion, and the injection groove is in communication with the slot.

[0009] In one embodiment of the present invention, the protrusion is further provided with a receiving groove, which is connected to the injection molding groove and is used to receive the wire harness of the sensor.

[0010] In one embodiment of the present invention, the bottom of the receiving groove is provided with at least two arc-shaped receiving portions.

[0011] In one embodiment of the present invention, one end of the cable is connected to a terminal, and the terminal abuts against the end of the protrusion.

[0012] In one embodiment of the present invention, the first module is further provided with a clearance groove for accommodating the terminal, the clearance groove being located at the end of the protrusion.

[0013] In one embodiment of the present invention, the injection molding material in step S5 is thermoplastic polyester resin.

[0014] The technical solution of the present invention has the following advantages compared with the prior art:

[0015] The sensor protection method described in this invention improves the compressive strength of the sensor's detection end by fixing it to the protective shell. The protective shell and cable are injection molded to form a protective sleeve, further enhancing the compressive strength of the sensor's detection end. This also secures the sensor and cable, preventing collisions between the cable and the sensor's detection end and reducing the risk of damage. The grooves on both sides of the protective shell allow the cable's sidewalls to fit snugly against the shell's sidewalls and also position the shell, ensuring it is stably clamped between the two cables and improving its stability. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a flowchart of a sensor protection method according to the present invention;

[0018] Figure 2 This is a schematic diagram of the assembly structure of the protective shell and the sensor;

[0019] Figure 3 This is a schematic diagram of the assembly structure of the protective shell and the cable;

[0020] Figure 4 This is a schematic diagram of the assembly structure of the protective sleeve, cable, and protective shell;

[0021] Figure 5 This is a structural diagram of the first module;

[0022] Figure 6 yes Figure 5 A structural diagram from another angle.

[0023] Explanation of reference numerals in the accompanying drawings: 1. Sensor; 2. Protective housing; 3. Cable; 4. Protective sleeve; 5. First module; 21. Groove; 51. Protrusion; 52. Slot; 53. Injection groove; 54. Receiving groove; 55. Feed groove; 56. Feed hole; 57. Through hole; 58. Positioning hole; 59. Clearance groove; 521. Injection part; 541. Receiving part. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0025] Reference Figure 1 As shown, a sensor protection method of the present invention includes the following steps: S1: Inserting the detection end of sensor 1 into protective shell 2 to fix the detection end of sensor 1 to protective shell 2; S2: Placing protective shell 2 between two cables 3; S3: Engaging protective shell 2 and two cables 3 with the first module 5 of injection mold, so that protective shell 2 is located in injection groove 53 of the first module 5; S4: Engaging second module of injection mold with first module 5; S5: Injecting into injection mold to pour injection material into injection cavity of injection mold; S6: After the injection material cools and solidifies, it forms a protective sleeve 4 covering protective shell 2 and cables 3, and detaching cables 3 and protective sleeve 4 from injection mold.

[0026] This embodiment of a sensor protection method improves the pressure resistance of the sensor 1's detection end by fixing the sensor 1's detection end to the protective shell 2. The protective shell 2 and the cable 3 are injection molded to form a protective sleeve 4, which further improves the pressure resistance of the sensor 1's detection end. At the same time, it can fix the sensor 1 and the cable 3, thereby avoiding collisions between the cable 3 and the sensor 1's detection end and reducing the risk of damage to the sensor 1's detection end.

[0027] Reference Figure 2As shown, step S1 involves inserting the detection end of sensor 1 into protective shell 2 to fix it in place. Protective shell 2 has a protective cavity with an opening at one end, allowing the detection end of sensor 1 to extend into the cavity. Step S1 also includes a potting step: after inserting the detection end of sensor 1 into the protective cavity of protective shell 2, potting is applied to the cavity to fix the detection end of sensor 1 to the protective shell 2. The potted potting also cushions the detection end of sensor 1 during vibration and impact, preventing damage. Protective shell 2 in step S1 is made of a thermally conductive metal, which increases its overall strength and stability, further preventing damage to the detection end of sensor 1. The use of a thermally conductive material for protective shell 2, along with the cable 3's fit with it, improves the accuracy of temperature detection by sensor 1. An arc-shaped groove 21 for the cable 3 is provided on the opposite side of protective shell 2.

[0028] Reference Figure 3 As shown, step S2 involves placing the protective shell 2 between the two cables 3. Specifically, the groove 21 on the protective shell 2 is adapted to the sidewall of the cable 3, i.e., the sidewall of the cable 3 is arc-shaped, and the sidewall of the cable 3 fits against the sidewall of the groove 21. The groove 21 allows the sidewall of the cable 3 to fit against the sidewall of the protective shell 2, and also positions the protective shell 2, ensuring that it is stably clamped between the two cables 3, thus improving the stability of the protective shell 2. Depending on the structure of the sidewall of the cable 3, the sidewall of the groove 21 can be configured with different structures to fit the sidewall of the cable 3. Depending on the number of cables 3, different numbers of grooves 21 can be provided on the sidewall of the protective shell 2 to fit the cables 3.

[0029] Reference Figures 4 to 6As shown, step S3 involves engaging the protective shell 2 and the two cables 3 with the first module 5 of the injection mold, so that the protective shell 2 is located within the injection groove 53 of the first module 5. The injection mold includes a first module 5 and a second module (not shown), wherein the first module 5 is the lower module and the second module is the upper module that cooperates with the first module. An injection unit is provided on the top side of the first module 5, and the injection unit includes a protrusion 51 located on the top side of the first module 5. The protrusion 51 has two slots 52 for accommodating the cables 3, and the sidewalls of the slots 52 are arc-shaped to fit the cables 3. The injection groove 53 is located in the middle of the top side of the protrusion 51, and the injection groove 53 communicates with both slots 52. The protective shell 2 is located in the middle of the injection groove 53 and between the two slots 52. The protrusion 51 is also provided with a receiving groove 54, which extends from the middle of one end of the protrusion 51 to the injection molding groove 53. The receiving groove 54 is used to accommodate the wire harness of the sensor 1, thereby avoiding interference between the wire harness of the sensor 1 and the protrusion 51. The bottom of the receiving groove 54 is provided with at least two arc-shaped receiving portions 541. In this embodiment, the wire harness of the sensor 1 consists of two wires, and the two wires are respectively engaged with the two arc-shaped receiving portions 541, thereby preventing the wire harness from shaking during the injection molding process and causing gaps in the protective sleeve 4, which would affect the injection molding quality. Depending on the number of wires in the wire harness of the sensor 1, the number of receiving portions 541 at the bottom of the receiving groove 54 can be set to correspond to the number of wires.

[0030] Preferably, the slot 52 further includes an injection molding section 521, which is located in the middle of the slot 52. The injection molding section 521 corresponds to and communicates with the injection groove 53. The diameter of the injection molding section 521 is larger than the diameter of the slot 52, so that during injection molding, the injection material can flow along the side wall of the injection molding section 521 and can cover the circumferential side wall of the two cables 3 and the protective shell 2, thereby improving the stability and pressure resistance of the protective sleeve 4 structure, and also improving the stability of the connection between the protective shell 2 and the cable 3. By setting the diameter of the injection molding section 521 to be larger than the diameter of the slot 52, the side wall of the slot 52 can abut against the side wall of the cable 3 and form a seal, thereby preventing the injection material from flowing out between the side wall of the slot 52 and the cable 3. By setting the grooves 21 on both sides of the protective shell 2, the grooves 21 can support the cable 3 in the position of the injection molding section 521, thereby preventing the cable 3 from bending.

[0031] One end of cable 3 is connected to a terminal (not shown in the figure), which facilitates the connection of cable 3 to electrical components. The terminal abuts against the end of the protrusion 51, thereby positioning cable 3 and ensuring that the terminals on both cables 3 are aligned, facilitating subsequent connection of cable 3 to external components. The first module 5 also has a relief groove 59 for accommodating the terminal, located at the end of the protrusion 51, to prevent cable 3 from bending due to excessively large terminals.

[0032] The first module 5 also has a feeding trough 55 in the middle. The bottom edge of the feeding trough 55 is arc-shaped, and a feeding hole 56 is provided in the middle of the bottom of the feeding trough 55. The feeding hole 56 is connected to the feeding source of the injection molding material, and the injection molding material can be injected into the feeding trough 55 through the feeding source. The feeding trough 55 has a through hole 57 that is connected to the adjacent injection molding part 521. The injection molding material can enter the injection molding part 521 through the through hole 57 until it fills the injection trough 53. Preferably, the first module 5 has two injection molding units, and the feeding trough 55 is located between the two injection molding units. The feeding trough 55 has two through holes 57, which are connected to the injection molding parts 521 of the two injection molding units respectively. This allows the injection molding material to enter the injection molding parts 521 of the two injection molding units through the two through holes 57 respectively, thereby enabling the simultaneous injection molding of two sets of cables 3 and protective shells 2, improving the injection molding efficiency.

[0033] Step S4 involves engaging the second module of the injection mold with the first module 5. Specifically, the top side of the first module 5 has two positioning holes 58, and the bottom side of the second module has positioning pins corresponding to the positioning holes 58. By moving the second module, the positioning pins engage with the positioning holes 58, thereby positioning and engaging the first module 5 and the second module, thus fixing their horizontal positions relative to each other. The bottom side of the second module also has an injection section 521 and an injection groove 53. After the first module 5 and the second module abut against each other, the injection section 521 and the injection groove 53 of the first module 5 and the second module together form an injection cavity.

[0034] Step S5 involves injection molding the mold, allowing the injection material to be poured into the injection cavity of the mold. Specifically, the material source injects the injection material into the material supply channel 55, and the injection material flows along the through hole 57 and enters the injection section 521 until the injection cavity is full. The injection material in step S5 is a thermoplastic polyester resin, specifically polybutylene terephthalate (PET), which has good high-temperature resistance, thus preventing damage to the protective sleeve 4 under high-temperature conditions.

[0035] Reference Figure 4 As shown, step S6 involves the injection molding material cooling and solidifying to form a protective sleeve 4 that is fitted over the protective shell 2 and the cable 3, thereby detaching the cable 3 and the protective sleeve 4 from the injection mold. Specifically, both the first module 5 and the second module are equipped with ejector pins that can extend into the injection section 521 and the injection groove 53, thus facilitating the detachment of the protective sleeve 4 from the injection mold. The protective sleeve 4 completely covers the protective shell 2, thereby improving the protective strength of the protective sleeve 4 for the protective shell 2.

[0036] This invention provides a sensor protection method. By fixing the detection end of sensor 1 to the protective shell 2, the compressive strength of the detection end of sensor 1 is improved. Furthermore, by injection molding the protective shell 2 and cable 3 to form a protective sleeve 4, the compressive strength of the detection end of sensor 1 is further improved. Simultaneously, the sensor 1 and cable 3 are fixed together, preventing collisions between the cable 3 and the detection end of sensor 1, thus reducing the risk of damage. The grooves 21 on both sides of the protective shell 2 allow the sidewalls of the cable 3 to fit against the sidewalls of the protective shell 2, and also position the protective shell 2, ensuring it is stably clamped between the two cables 3, thus improving the stability of the protective shell 2. Because the diameter of the injection molding part 521 is larger than the diameter of the slot 52, the injection material can flow along the sidewall of the injection molding part 521 during injection molding. The injection material can cover the circumferential sidewalls of the two cables 3 and the protective shell 2, thereby improving the stability and compressive strength of the protective sleeve 4 structure, and also improving the stability of the connection between the protective shell 2 and the cable 3.

[0037] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A sensor protection method, characterized in that, Includes the following steps: S1: Insert the sensor's detection end into the protective housing to fix the sensor's detection end to the protective housing; S2: Place the protective case between the two cables; S3: Connect the protective shell and the two cables to the first module of the injection mold, so that the protective shell is located in the injection groove of the first module; S4: Connect the second module of the injection mold to the first module; S5: Injecting the molding material into the injection cavity of the injection mold; S6: After the injection molding material cools and solidifies, it forms a protective sleeve that covers the protective shell and cable, thus removing the cable and protective sleeve from the injection mold.

2. The sensor protection method according to claim 1, characterized in that: Step S1 also includes a potting step, in which the sensor's detection end is inserted into the protective shell and then potting is performed inside the protective shell.

3. The sensor protection method according to claim 1, characterized in that: In step S1, the protective shell has an arc-shaped groove on the opposite side, and in step S2, the cable is attached to the side wall of the groove.

4. The sensor protection method according to claim 1, characterized in that: The first module is provided with a protrusion, and the protrusion is provided with two slots for accommodating the cable.

5. The sensor protection method according to claim 4, characterized in that: The injection groove is located on the protrusion, and the injection groove is connected to the slot.

6. The sensor protection method according to claim 5, characterized in that: The protrusion is also provided with a receiving groove, which is connected to the injection molding groove and is used to accommodate the sensor's wiring harness.

7. The sensor protection method according to claim 6, characterized in that: The bottom of the receiving groove is provided with at least two arc-shaped receiving parts.

8. The sensor protection method according to claim 4, characterized in that: One end of the cable is connected to a terminal, which abuts against the end of the protrusion.

9. The sensor protection method according to claim 8, characterized in that: The first module is also provided with a clearance groove for accommodating the terminal, the clearance groove being located at the end of the protrusion.

10. The sensor protection method according to claim 1, characterized in that: The injection molding material in step S5 is thermoplastic polyester resin.

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