Heating detection device of overheat protector

Abstract

The utility model discloses a heating detection device for an overheat protector, which relates to the technical field of overheat protector detection and comprises a conveying belt, a primary quality inspection screening mechanism, a preheating mechanism and a heating mechanism are fixedly mounted at the top of the conveying belt, and the primary quality inspection screening mechanism, the preheating mechanism and the heating mechanism are fixedly mounted at the top of the conveying belt. A secondary quality inspection screening mechanism is fixedly mounted at the top of the conveying belt, and a qualified product collecting mechanism is mounted at the tail of the conveying belt; before the overheat protectors are heated by the heating mechanism, the first-stage quality inspection and screening mechanism is used for quality inspection and screening, unheated defective overheat protectors can be screened out in the process, and then first-stage quality inspection qualified products are sequentially heated by the heating mechanism and subjected to quality inspection and screening by the second-stage quality inspection and screening mechanism; and finally, the overheat protectors entering the qualified product collecting mechanism are really qualified products, so that the defective rate of the overheat protectors after quality inspection is effectively reduced.

Description

A heating detection device for overheat protection Technical Field

[0001] This utility model relates to the field of overheat protector detection technology, and in particular to an overheat protector heating detection device. Background Technology

[0002] Thermal protectors, also known as overheat protectors or temperature control switches, are mainly used to prevent electric motors from malfunctioning due to internal overheating. The working principle of an overheat protector is based on the thermal effect of electric current. It utilizes a bimetallic strip that bends due to heat generated when current flows through it, thereby cutting off the circuit and protecting the motor. This device is typically composed of two strips made of different alloys. When the temperature exceeds a set value, the contacts automatically disconnect, achieving power-off protection.

[0003] A search revealed that Chinese patent CN213468705U discloses a thermal protector detection and sorting device, comprising a base, with two sets of identical insulation boxes and a feeding box on the upper surface of the base. High-temperature conveyor belts are interspersed inside the insulation boxes and the feeding box. A heating wire power supply is located on the upper surface of the inlet end of the insulation box, and a heating wire is installed on the lower surface of the heating wire power supply, passing through the top wall of the insulation box. A detection device is located on the upper surface of the outlet end of the insulation box, comprising a drive cylinder and a detection head. The drive cylinder is located on the upper surface of the insulation box, and the lower surface of the drive cylinder is connected to the detection head through a cylinder rod passing through the top wall of the insulation box. Waste boxes and electric push rods are respectively located on both sides of the feeding box, with a push rod at one end of the electric push rod.

[0004] The aforementioned public document describes a process where the thermal protector is heated and then tested using a detection device to determine its quality. After the two tests, qualified and unqualified products are separated and placed separately. Although the testing process involves two steps, both are performed after the thermal protector has been heated. If the metal strip in the thermal protector is bent and separated, it is considered qualified; otherwise, it is considered unqualified. However, this method has a flaw: if the metal strip in the thermal protector has already bent and separated before heating, heating and testing will only classify it as qualified, even though it is actually unqualified. This testing method has an oversight, which means that even the qualified thermal protectors may contain defective products.

[0005] To address the aforementioned issues, this application proposes a heating detection device for an overheat protector. Summary of the Invention

[0006] This invention provides a heating detection device for an overheat protector to solve the above-mentioned technical problems.

[0007] To solve the above-mentioned technical problems, this utility model provides an overheat protector heating detection device, including a conveyor belt and a primary quality inspection and screening mechanism. The primary quality inspection and screening mechanism is fixedly installed on the top of the conveyor belt and is used for quality inspection and screening of unheated overheat protectors.

[0008] A preheating mechanism is fixedly installed on the top of the conveyor belt. The preheating mechanism is located on the right side of the primary quality inspection and screening mechanism. The preheating mechanism is used to preheat the unheated overheat protector.

[0009] A heating mechanism is fixedly installed on the top of the conveyor belt. The heating mechanism is located to the right of the preheating mechanism and is used to heat the unheated overheat protector.

[0010] A secondary quality inspection and screening mechanism is fixedly installed on the top of the conveyor belt. The secondary quality inspection and screening mechanism is located on the right side of the heating mechanism. The secondary quality inspection and screening mechanism is used to inspect and screen the overheat protector after it has been heated by the heating mechanism.

[0011] A qualified product collection mechanism is installed at the tail of the conveyor belt. The qualified product collection mechanism is used to collect overheat protectors that have passed quality inspection.

[0012] Preferably, the primary quality inspection screening mechanism includes a gantry frame, which is fixedly connected to the top of the conveyor belt by bolts. A cylinder is fixedly connected to the top of the gantry frame, and a detection head is fixedly connected to the end of the piston rod of the cylinder. The detection head is located inside the gantry frame.

[0013] Preferably, the primary quality inspection screening mechanism further includes a side plate, which is fixedly connected to one side of the gantry frame. The side plate is located above and behind the conveyor belt. A second cylinder is fixedly connected to the rear side of the side plate. A push plate is fixedly connected to the end of the piston rod of the second cylinder. The push plate is located in front of the side plate and above the conveyor belt.

[0014] Preferably, the primary quality inspection screening mechanism further includes a guide inclined plate and a defective product collection box. The guide inclined plate is fixedly connected to the top of the front side of the conveyor belt and is located at the lower part directly in front of the push plate. The defective product collection box is located in front of the conveyor belt and is located below the guide inclined plate.

[0015] Preferably, the preheating mechanism includes a rectangular tube with two fans embedded on one side. Multiple air outlet pipes are fixedly connected to the bottom of the rectangular tube and are connected to the inside of the rectangular tube. An L-shaped fixing arm is fixedly connected to the front and rear sides of the rectangular tube respectively, and the bottom of the L-shaped fixing arm is fixedly connected to the side of the conveyor belt by bolts.

[0016] Preferably, the heating mechanism includes an insulation box, which is fixedly connected to the top of the conveyor belt by bolts. An electric heater is fixedly connected to the top of the insulation box near the preheating mechanism, and the electric heater passes through the insulation box and extends into the interior of the insulation box. The rectangular tube passes through the insulation box near the fan and extends to the side of the electric heater.

[0017] Preferably, the secondary quality inspection screening mechanism and the primary quality inspection screening mechanism have the same structure.

[0018] Preferably, the qualified product collection mechanism includes a second guide ramp and a qualified product collection box. The second guide ramp is fixedly connected to the tail end of the conveyor belt, and the qualified product collection box is located below the second guide ramp.

[0019] Compared with related technologies, the overheat protection device for heating detection provided by this utility model has the following advantages:

[0020] 1. Before the overheat protector is heated by the heating mechanism, it is first screened by a primary quality inspection mechanism. This process can screen out the defective overheat protectors that have not been heated. Then, the qualified products of the primary quality inspection are heated by the heating mechanism and screened by the secondary quality inspection mechanism. Only the overheat protectors that finally enter the qualified product collection mechanism are truly qualified products, which effectively reduces the defect rate of overheat protectors after quality inspection.

[0021] 2. Before the overheat protector is heated by the heating mechanism, the preheating mechanism can conduct some of the excess heat from the electric heater and blow it toward the overheat protector that has not yet entered the insulation box, thereby preheating the overheat protector in advance. Then, when the preheated overheat protector enters the heating mechanism, it can be heated more quickly, and the thermal energy utilization rate of the electric heater is also improved. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 is a schematic diagram of the primary quality inspection and screening mechanism of this utility model;

[0024] Figure 3 is a schematic diagram of the preheating mechanism and heating mechanism of this utility model;

[0025] Figure 4 is a cross-sectional view of the preheating mechanism of this utility model;

[0026] Figure 5 is a schematic diagram of the qualified product collection mechanism of this utility model.

[0027] The diagram is labeled as follows: 1. Conveyor belt; 2. Primary quality inspection and screening mechanism; 21. Gantry frame; 22. Cylinder 1; 23. Detection head; 24. Side plate; 25. Cylinder 2; 26. Push plate; 27. Guide ramp 1; 28. Defective product collection box; 3. Preheating mechanism; 31. Rectangular tube; 32. Fan; 33. Air outlet pipe; 34. L-shaped fixed arm; 4. Heating mechanism; 41. Insulation box; 42. Electric heater; 5. Secondary quality inspection and screening mechanism; 6. Qualified product collection mechanism; 61. Guide ramp 2; 62. Qualified product collection box. Detailed Implementation

[0028] Example 1, as shown in Figures 1-5, includes a conveyor belt 1 and a primary quality inspection and screening mechanism 2. The primary quality inspection and screening mechanism 2 is fixedly installed on the top of the conveyor belt 1. The primary quality inspection and screening mechanism 2 is used for quality inspection and screening of unheated overheat protectors.

[0029] Preheating mechanism 3 is fixedly installed on the top of the conveyor belt 1. The preheating mechanism 3 is located on the right side of the primary quality inspection screening mechanism 2. The preheating mechanism 3 is used to preheat the unheated overheat protector.

[0030] Heating mechanism 4 is fixedly installed on the top of conveyor belt 1. Heating mechanism 4 is located on the right side of preheating mechanism 3. Heating mechanism 4 is used to heat the unheated overheat protector.

[0031] The secondary quality inspection screening mechanism 5 is fixedly installed on the top of the conveyor belt 1. The secondary quality inspection screening mechanism 5 is located on the right side of the heating mechanism 4. The secondary quality inspection screening mechanism 5 is used to inspect and screen the overheat protector after it has been heated by the heating mechanism 4.

[0032] The qualified product collection mechanism 6 is installed at the tail of the conveyor belt 1. The qualified product collection mechanism 6 is used to collect the overheat protectors that have passed the quality inspection.

[0033] The primary quality inspection screening mechanism 2 includes a gantry frame 21, which is fixedly connected to the top of the conveyor belt 1 by bolts. A cylinder 22 is fixedly connected to the top of the gantry frame 21, and a detection head 23 is fixedly connected to the end of the piston rod of the cylinder 22. The detection head 23 is located inside the gantry frame 21.

[0034] When the overheat protector moves to the position below the detection head 23 in the gantry 21, cylinder 22 will push the detection head 23 downward. Then the detection head 23 will detect the unheated overheat protector. As can be seen from the public document CN213468705U, the detection head 23 is prior art. Therefore, the specific structure and detection principle of the detection head 23 will not be described in detail here.

[0035] The primary quality inspection screening mechanism 2 also includes a side plate 24, which is fixedly connected to one side of the gantry frame 21. The side plate 24 is located above the rear side of the conveyor belt 1. A second cylinder 25 is fixedly connected to the rear side of the side plate 24. A push plate 26 is fixedly connected to the end of the piston rod of the second cylinder 25. The push plate 26 is located in front of the side plate 24 and is located above the conveyor belt 1.

[0036] When the detection head 23 detects a defective unheated overheat protector, the cylinder 25 will drive the push plate 26 to move forward when the defective overheat protector moves in front of the push plate 26, and the push plate 26 will push the defective overheat protector off the conveyor belt 1.

[0037] The primary quality inspection and screening mechanism 2 also includes a guide inclined plate 27 and a defective product collection box 28. The guide inclined plate 27 is fixedly connected to the top front side of the conveyor belt 1 and is located at the lower front of the push plate 26. The defective product collection box 28 is located in front of the conveyor belt 1 and is located below the guide inclined plate 27.

[0038] The defective overheat protectors pushed off the conveyor belt 1 by the push plate 26 will fall into the defective product collection box 28 for unified collection by the guide plate 27.

[0039] The secondary quality inspection screening mechanism 5 and the primary quality inspection screening mechanism 2 have the same structure. The primary quality inspection screening mechanism 2 is used for quality inspection screening of unheated overheat protectors, while the secondary quality inspection screening mechanism 5 is used for quality inspection screening of heated overheat protectors. Since the primary quality inspection screening mechanism 2 and the secondary quality inspection screening mechanism 5 have the same structure and similar functions, the specific structure of the secondary quality inspection screening mechanism 5 will not be described in detail here.

[0040] The qualified product collection mechanism 6 includes a second guide ramp 61 and a qualified product collection box 62. The second guide ramp 61 is fixedly connected to the tail of the conveyor belt 1, and the qualified product collection box 62 is located below the second guide ramp 61.

[0041] After passing multiple quality inspections, the overheat protectors will be transported on conveyor belt 1 to the qualified product collection mechanism 6 at the end. The overheat protectors will be guided from the end of conveyor belt 1 by guide plate 61 and finally enter the qualified product collection box 62 for unified collection.

[0042] In Example 2, based on Example 1, the preheating mechanism 3 includes a rectangular tube 31. Two fans 32 are embedded on one side of the rectangular tube 31. Multiple air outlet pipes 33 are fixedly connected to the bottom of the rectangular tube 31, and the air outlet pipes 33 are connected to the inside of the rectangular tube 31. An L-shaped fixed arm 34 is fixedly connected to the front and rear sides of the rectangular tube 31 respectively. The bottom of the L-shaped fixed arm 34 is fixedly connected to the side of the conveyor belt 1 by bolts.

[0043] The heating mechanism 4 includes a heat preservation box 41, which is fixedly connected to the top of the conveyor belt 1 by bolts. An electric heater 42 is fixedly connected to the top of the heat preservation box 41 near the preheating mechanism 3. The electric heater 42 passes through the heat preservation box 41 and extends into the interior of the heat preservation box 41. A rectangular tube 31 passes through the heat preservation box 41 near the fan 32 and extends to the side of the electric heater 42.

[0044] When the electric heater 42 in the heating mechanism 4 is running and dissipating heat, it can heat the overheat protector on the one hand, and the excess heat can be guided into the rectangular tube 31 by the fan 32 in the preheating mechanism on the other hand. Then the heat is blown out through the air outlet 33 to the overheat protector on the conveyor belt 1, so as to preheat the unheated overheat protector in advance. Then, when the preheated overheat protector enters the heating mechanism 4, it can be heated more quickly, and at the same time, the thermal energy utilization rate of the electric heater 42 is improved.

[0045] Working principle:

[0046] The overheat protectors are conveyed from left to right via conveyor belt 1. During the conveying process, the overheat protectors are first inspected and screened by the primary quality inspection and screening mechanism 2. After the unheated overheat protectors are inspected by the detection head 23, the qualified products continue to be conveyed on conveyor belt 1, while the unqualified products are pushed forward by cylinder 25 to push the push plate 26. The push plate 26 pushes the unqualified products off the conveyor belt 1, and then they fall into the defective product collection box 28 for unified collection after being guided by the guide inclined plate 27.

[0047] When the first-level quality inspection qualified products continue to be conveyed on the conveyor belt 1, they will first be preheated by the preheating mechanism 3, and then enter the heating mechanism 4 to be heated. During the preheating process, the preheating mechanism 3 draws the heat emitted by the electric heater 42 into the rectangular tube 31 and blows it to the overheat protector through the air outlet 33, thereby preheating the overheat protector in advance. After preheating, the overheat protector enters the heat preservation box 41 and is thoroughly heated by the electric heater 42. After the overheat protector comes out from the tail of the heat preservation box 41, it will be inspected again by the second-level quality inspection screening mechanism 5, and the qualified products and unqualified products are screened in the same way as the first-level quality inspection screening mechanism 2.

[0048] As the conveyor belt 1 continues to transport the qualified overheat protectors, they are eventually guided by the guide plate 61 and collected in the qualified product collection box 62.

Claims

1. A heating detection device for an overheat protector, comprising a conveyor belt (1), characterized in that: A primary quality inspection screening mechanism (2) is fixedly installed on the top of the conveyor belt (1). The primary quality inspection screening mechanism (2) is used for quality inspection screening of unheated overheat protectors. A preheating mechanism (3) is fixedly installed on the top of the conveyor belt (1). The preheating mechanism (3) is located to the right of the primary quality inspection screening mechanism (2). The preheating mechanism (3) is used for preheating unheated overheat protectors. A heating mechanism (4) is fixedly installed on the top of the conveyor belt (1). The heating mechanism (4) is located to the right of the preheating mechanism. (3) On the right side, the heating mechanism (4) is used to heat the unheated overheat protector; the secondary quality inspection screening mechanism (5) is fixedly installed on the top of the conveyor belt (1), the secondary quality inspection screening mechanism (5) is located on the right side of the heating mechanism (4), and the secondary quality inspection screening mechanism (5) is used to inspect and screen the overheat protector after it has been heated by the heating mechanism (4); the qualified product collection mechanism (6) is installed at the tail of the conveyor belt (1), and the qualified product collection mechanism (6) is used to collect the overheat protector that has passed the quality inspection.

2. The overheat protection device for heating detection according to claim 1, characterized in that, The primary quality inspection screening mechanism (2) includes a gantry frame (21), which is fixedly connected to the top of the conveyor belt (1) by bolts. A cylinder (22) is fixedly connected to the top of the gantry frame (21), and a detection head (23) is fixedly connected to the end of the piston rod of the cylinder (22). The detection head (23) is located inside the gantry frame (21).

3. The overheat protection device for heating detection according to claim 2, characterized in that, The primary quality inspection screening mechanism (2) also includes a side plate (24), which is fixedly connected to one side of the gantry frame (21). The side plate (24) is located above the rear side of the conveyor belt (1). A cylinder (25) is fixedly connected to the rear side of the side plate (24). A push plate (26) is fixedly connected to the end of the piston rod of the cylinder (25). The push plate (26) is located in front of the side plate (24) and above the conveyor belt (1).

4. The overheat protection device for heating detection according to claim 3, characterized in that, The primary quality inspection screening mechanism (2) also includes a guide inclined plate (27) and a defective product collection box (28). The guide inclined plate (27) is fixedly connected to the top front side of the conveyor belt (1) and is located at the lower front of the push plate (26). The defective product collection box (28) is located in front of the conveyor belt (1) and is located below the guide inclined plate (27).

5. The overheat protection device for heating detection according to claim 1, characterized in that, The preheating mechanism (3) includes a rectangular tube (31), with two fans (32) embedded on one side of the rectangular tube (31). Multiple air outlet pipes (33) are fixedly connected to the bottom of the rectangular tube (31), and the air outlet pipes (33) and the rectangular tube (31) are connected internally. An L-shaped fixed arm (34) is fixedly connected to the front and rear sides of the rectangular tube (31), and the bottom of the L-shaped fixed arm (34) is fixedly connected to the side of the conveyor belt (1) by bolts.

6. The overheat protection device for heating detection according to claim 5, characterized in that, The heating mechanism (4) includes a heat preservation box (41), which is fixedly connected to the top of the conveyor belt (1) by bolts. An electric heater (42) is fixedly connected to the top of the heat preservation box (41) near the preheating mechanism (3). The electric heater (42) penetrates the heat preservation box (41) and extends into the interior of the heat preservation box (41). The rectangular tube (31) near the fan (32) penetrates the heat preservation box (41) and extends to the side of the electric heater (42).

7. The overheat protection device for heating detection according to claim 1, characterized in that, The secondary quality inspection screening mechanism (5) and the primary quality inspection screening mechanism (2) have the same structure.

8. The overheat protection device for heating detection according to claim 1, characterized in that, The qualified product collection mechanism (6) includes a second guide ramp (61) and a qualified product collection box (62). The second guide ramp (61) is fixedly connected to the tail of the conveyor belt (1), and the qualified product collection box (62) is located below the second guide ramp (61).

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