High temperature resistant proximity switch

Abstract

The utility model discloses a kind of high-temperature-resistant proximity switches, including proximity switch body, the one end of proximity switch body is connected with induction head, the other end is connected with connecting wire, the outside of proximity switch body is threadedly connected with heat dissipation cover, the bottom of heat dissipation cover is connected with liquid storage tank, the top of liquid storage tank is connected with support frame, circulation heat dissipation mechanism is equipped between support frame and heat dissipation cover, the bottom of liquid storage tank is equipped with clamping positioning mechanism. The utility model has following effect: by integrated active circulation liquid cooling heat dissipation, air cooling auxiliary cooling and multiple measures such as ceramic heat insulation protection, the working stability and reliability of proximity switch under sustained high-temperature environment are significantly improved, effectively avoid the electronic component failure problem caused by high temperature, prolong the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of proximity switch technology, and more specifically, to a high-temperature resistant proximity switch. Background Technology

[0002] In the field of modern industrial automation control, inductive proximity switches are widely used due to their advantages such as non-contact detection, fast response speed, and stable and reliable operation. Their working principle utilizes the electromagnetic induction effect. When a metal object enters the vicinity of the sensing surface, eddy currents are generated within the metal object, causing the oscillation capability of the coil inside the switch to decrease. By detecting changes in the circuit, the presence of a target object is determined, and a corresponding switching signal is output.

[0003] However, in certain special working conditions, such as in metallurgy, glass manufacturing, ceramic sintering, or high-temperature machining, the objects being detected are often at high temperatures. When these high-temperature objects approach a proximity switch for detection, the large amount of heat radiation and conduction emitted directly affects the proximity switch's casing and internal structure. Due to the limited heat dissipation performance and temperature resistance of traditional proximity switches, internal electronic components (such as integrated circuits, transistors, and coils) are subjected to high-temperature environments for extended periods. This continuous thermal stress can easily cause component parameter drift and performance degradation, and may even lead to overheating and damage to components, resulting in problems such as malfunctions, slow response, or complete failure of the proximity switch. Utility Model Content

[0004] In view of the problems in related technologies, this utility model proposes a high-temperature resistant proximity switch to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows:

[0006] A high-temperature resistant proximity switch includes a proximity switch body, a sensing head connected to one end of the proximity switch body, a connecting wire connected to the other end, a heat sink threadedly connected to the outer side of the proximity switch body, a liquid storage tank connected to the bottom of the heat sink, a support frame connected to the top of the liquid storage tank, a circulating heat dissipation mechanism provided between the support frame and the heat sink, and a clamping and positioning mechanism provided at the bottom of the liquid storage tank.

[0007] Furthermore, in order to achieve efficient liquid cooling of the proximity switch body when detecting high-temperature objects, the circulating heat dissipation mechanism includes a cooling pump installed on the surface of the liquid storage tank, a heat dissipation cavity inside the heat dissipation shroud, the output end of the cooling pump being connected to the heat dissipation cavity, a recovery pipe being connected to one side of the heat dissipation cavity, and the end of the recovery pipe being connected to the liquid storage tank.

[0008] Furthermore, in order to quickly cool the coolant after heat absorption and recovery, a positioning frame is installed on one side of the support frame, and a cooling fan is installed inside the positioning frame.

[0009] Furthermore, in order to fix the proximity switch body in place at the detection position, the clamping and positioning mechanism includes limiting plates connected to both sides of the bottom of the liquid storage tank, one of the limiting plates has an adjusting screw threadedly connected to its surface, and the end of the adjusting screw is rotatably connected to a clamping plate.

[0010] Furthermore, in order to achieve high temperature resistance for the sensing head at one end of the proximity switch body, a heat insulation cover is installed on the outside of the sensing head.

[0011] Furthermore, to facilitate the screwing and unscrewing of the threaded connection between the proximity switch body and the heat sink, a screwing block is connected to one side of the proximity switch body.

[0012] Furthermore, to facilitate the addition of coolant to the reservoir, an injection pipe is installed on one side of the outer surface of the reservoir.

[0013] Furthermore, in order to increase the friction between the limiting plate and the clamping plate and the part to be clamped, the surfaces of the limiting plate and the clamping plate are provided with anti-slip textures.

[0014] The beneficial effects of this utility model are as follows: Through the circulating heat dissipation mechanism, the heat absorbed and generated by the proximity switch body can be effectively conducted to the coolant, and the temperature can be quickly reduced by natural convection and forced air cooling. The coolant is circulated and reused, thereby keeping the operating temperature of the proximity switch within a safe range and avoiding damage or performance degradation of electronic components due to overheating. This design greatly improves the heat resistance of the sensing head, ensuring that the proximity switch can work stably in high-temperature environments and extending the service life of the equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the surface structure of a high-temperature resistant proximity switch according to an embodiment of the present utility model;

[0017] Figure 2 This is a side view of a high-temperature resistant proximity switch according to an embodiment of the present utility model;

[0018] Figure 3This is a rear view of a high-temperature resistant proximity switch according to an embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of the surface structure of a high-temperature proximity switch after the cooling fan has been disassembled, according to an embodiment of the present invention.

[0020] Figure 5 This is an internal cross-sectional view of the heat sink and heat insulation cover in a high-temperature resistant proximity switch according to an embodiment of the present invention.

[0021] In the picture:

[0022] 1. Proximity switch body; 2. Sensing head; 3. Connecting wire; 4. Heat sink; 5. Liquid storage tank; 6. Support frame; 7. Circulating heat dissipation mechanism; 701. Cooling pump; 702. Heat dissipation cavity; 703. Recovery pipe; 704. Positioning frame; 705. Cooling fan; 8. Clamping and positioning mechanism; 801. Limiting plate; 802. Adjusting screw; 803. Clamping plate; 9. Heat insulation cover; 10. Tightening block; 11. Liquid injection pipe; 12. Anti-slip texture. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] According to an embodiment of the present invention, a high-temperature resistant proximity switch is provided.

[0025] like Figures 1-5As shown, a high-temperature resistant proximity switch according to an embodiment of the present invention includes a proximity switch body 1, which is an inductive proximity switch. One end of the proximity switch body 1 is connected to a sensing head 2, and the other end is connected to a connecting wire 3. A coil is installed inside the sensing head 2 to generate a high-frequency alternating magnetic field. The connecting wire 3 is used to power the electronic components inside the proximity switch body 1. The proximity switch body 1 includes an oscillator, a switching circuit, and an amplification output circuit. The oscillator generates a high-frequency signal to drive the coil to form an alternating magnetic field. When a metal object approaches, eddy currents are induced in the coil, causing energy loss and a decrease in oscillation amplitude. At this time, the switching circuit detects the low amplitude. Upon setting a threshold, a target object is detected approaching, triggering a signal. This signal is processed and amplified by an amplified output circuit, changing the output state and thus outputting the detection result to an external control system. A stainless steel heat sink 4 is threadedly connected to the outer side of the proximity switch body 1. A liquid storage tank 5 is connected to the bottom of the heat sink 4, and the liquid storage tank 5 stores coolant. A support frame 6 is connected to the top of the liquid storage tank 5, and a circulating heat dissipation mechanism 7 is provided between the support frame 6 and the heat sink 4 to draw the coolant from the liquid storage tank 5 into the heat sink 4, thereby efficiently dissipating heat from the proximity switch body 1. A clamping and positioning mechanism 8 is provided at the bottom of the liquid storage tank 5 to clamp and install the entire device at the location to be detected.

[0026] like Figures 1-5As shown, the circulating heat dissipation mechanism 7 includes a cooling pump 701 mounted on the surface of the liquid storage tank 5, a heat dissipation cavity 702 inside the heat dissipation shroud 4, the output end of the cooling pump 701 connected to the heat dissipation cavity 702, a recovery pipe 703 connected to one side of the heat dissipation cavity 702, and the end of the recovery pipe 703 connected to the liquid storage tank 5. The cooling pump 701 draws the coolant from the liquid storage tank 5 into the heat dissipation cavity 702, allowing the coolant to absorb heat from the proximity switch body 1 inside the heat dissipation shroud 4. The coolant, after absorbing heat, can pass through the recovery pipe 703. The coolant is then returned to the storage tank 5. The recovery pipe 703 is an S-shaped rectangular plate made of copper, which allows for sufficient heat exchange between the coolant and the outside air during the recovery process, thereby releasing the absorbed heat to the outside air. A positioning frame 704 is installed on one side of the support frame 6, and a cooling fan 705 is installed inside the positioning frame 704. The cooling fan 705 is installed on one side of the recovery pipe 703. By activating the cooling fan 705, the coolant in the recovery pipe 703 can be efficiently cooled by air, accelerating the cooling down of the coolant during recovery. Effect; The clamping and positioning mechanism 8 includes limiting plates 801 connected to both sides of the bottom of the liquid storage tank 5. An adjusting screw 802 is threadedly connected to the surface of one of the limiting plates 801. A clamping plate 803 is rotatably connected to the end of the adjusting screw 802. When the device needs to be installed as a whole, the limiting plate 801 and the clamping plate 803 are placed on both sides of the support at the point to be tested. By turning the adjusting screw 802, the clamping plate 803 is continuously moved closer to one of the limiting plates 801, thereby firmly clamping the entire device at the point to be tested. A ceramic heat shield 9 is installed on the outside of the sensor head 2 to improve the heat resistance of the sensor head 2; a screw block 10 is connected to one side of the proximity switch body 1 to facilitate the screwing and unscrewing of the threaded connection between the proximity switch body 1 and the heat sink 4; an injection pipe 11 is installed on one side of the outer surface of the liquid storage tank 5 to facilitate the injection of coolant into the liquid storage tank 5; the surfaces of the limiting plate 801 and the clamping plate 803 are provided with anti-slip textures 12 to increase the friction when the limiting plate 801 and the clamping plate 803 come into contact with the part to be clamped.

[0027] In practical use, first, place the limiting plates 801 and clamping plates 803 on both sides of the bottom of the liquid storage tank 5 on both sides of the support structure. Rotate the adjusting screw 802 to push the clamping plate 803 towards one of the limiting plates 801 until the two clamp the support tightly. The anti-slip texture 12 on the surface of the limiting plate 801 and clamping plate 803 effectively improves the clamping stability and prevents the device from loosening or falling off during operation. After the proximity switch body 1 is powered on, it can perform non-contact detection of metal objects. When the detected object is in a high-temperature state, the cooling pump 701 is started, and the coolant stored in the liquid storage tank 5 is extracted and transported through the pipeline to the heat dissipation cavity 702 inside the heat dissipation cover 4. The heat dissipation cover 4 is made of stainless steel with good thermal conductivity and is threadedly connected to the proximity switch body 1 to ensure that heat can be quickly conducted from the proximity switch body 1 to the coolant in the heat dissipation cover 4 and the heat dissipation cavity 702, achieving efficient heat absorption and cooling. After absorbing heat, the high-temperature coolant returns to the storage tank 5 via the recovery pipe 703. During this process, the recovery pipe 703 is made of copper and designed as an S-shaped rectangular plate structure with a large surface area, which is conducive to sufficient natural convection heat exchange with the outside air. At the same time, the cooling fan 705 located on the support frame 6 starts simultaneously, forcing airflow to blow on the surface of the recovery pipe 703, further accelerating the heat dissipation efficiency of the coolant during the return process, significantly reducing its temperature, and effectively cooling it before entering the storage tank 5, thereby ensuring the stable and cyclical use of the coolant.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-temperature resistant proximity switch, characterized in that, It includes a proximity switch body (1), one end of which is connected to a sensing head (2) and the other end is connected to a connecting wire (3). A heat sink (4) is threadedly connected to the outside of the proximity switch body (1). A liquid storage tank (5) is connected to the bottom of the heat sink (4). A support frame (6) is connected to the top of the liquid storage tank (5). A circulating heat dissipation mechanism (7) is provided between the support frame (6) and the heat sink (4). A clamping and positioning mechanism (8) is provided at the bottom of the liquid storage tank (5).

2. The high-temperature resistant proximity switch according to claim 1, characterized in that, The circulating heat dissipation mechanism (7) includes a cooling pump (701) mounted on the surface of the liquid storage tank (5), a heat dissipation cavity (702) inside the heat dissipation cover (4), the output end of the cooling pump (701) is connected to the heat dissipation cavity (702), a recovery pipe (703) is connected to one side of the heat dissipation cavity (702), and the end of the recovery pipe (703) is connected to the liquid storage tank (5).

3. A high-temperature resistant proximity switch according to claim 2, characterized in that, A positioning frame (704) is installed on one side of the support frame (6), and a cooling fan (705) is installed inside the positioning frame (704).

4. A high-temperature resistant proximity switch according to claim 1, characterized in that, The clamping and positioning mechanism (8) includes two bottom limit plates (801) connected to the bottom of the liquid storage tank (5). One of the limit plates (801) has an adjusting screw (802) threadedly connected to its surface, and the end of the adjusting screw (802) is rotatably connected to a clamping plate (803).

5. A high-temperature resistant proximity switch according to claim 1, characterized in that, A heat shield (9) is installed on the outside of the sensor head (2).

6. A high-temperature resistant proximity switch according to claim 1, characterized in that, A screw block (10) is connected to one side of the proximity switch body (1).

7. A high-temperature resistant proximity switch according to claim 1, characterized in that, A liquid injection pipe (11) is installed on one side of the outer surface of the liquid storage tank (5).

8. A high-temperature resistant proximity switch according to claim 4, characterized in that, The surfaces of the limiting plate (801) and the clamping plate (803) are provided with anti-slip texture (12).

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