Plastic particle aging resistance detection box

Abstract

A plastic particle anti-aging detection box is used for solving the problems that in the prior art, a plastic aging detection box in the prior art can conduct ventilation on the interior of an aging box, but plastic aging detection needs to be continuously conducted within a temperature range, and due to the fact that the difference between the temperature of airflow inside the aging box and the temperature of airflow outside the aging box is large, plastic aging detection cannot be conducted. The technical problems that in the prior art, the temperature of a detected object in an aging box is likely to change greatly in a short time, plastic to be detected cannot be stabilized within a temperature range, and the aging resistance detection of the detected object is affected are solved, and the device comprises a detection box which is internally and fixedly provided with a placement plate; a plurality of placing holes for placing plastic particles are formed in the placing plate, two electric heating wires for heating gas in the detection box are arranged in the detection box in a sliding mode and located on the two sides of the placing plate respectively, and a preheating box is fixedly arranged on the detection box and connected with the detection box in a conducting mode; a preheating assembly used for preheating gas is arranged in the preheating box.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic detection, in particular to a plastic particle aging resistance detection box. Background Art

[0002] Heat is one of the main factors that cause aging of plastic materials. Heat can accelerate the movement of polymer chains, causing them to break, generate active free radicals, and cause free radical chain reactions, leading to polymer degradation or cross-linking. Hot air aging test is one of the main test methods for evaluating plastic materials and studying the aging resistance of plastic materials.

[0003] Aging boxes in the prior art, such as the utility model patent document with the authorization announcement number "CN220251689U" and the patent name "A hot air aging box that is convenient for ventilation", disclose an aging box, including a carrier plate, the outer surface of the carrier plate is fixedly connected to a shell, the inner part of the carrier plate is rotatably connected to an output shaft, the lower end of the output shaft is fixedly connected to a servo motor A, and the upper end of the output shaft is fixedly connected to a cam. When the hot air aging box that is convenient for ventilation is in use, when ventilation is needed, the heating module heats up, and at the same time, the servo motor B drives the power shaft to rotate, the power shaft drives the fan blades to rotate, and the fan blades suck out the outside gas, and at the same time, the power shaft drives the power gear to rotate, the power gear drives the fixed gear to rotate, the fixed gear drives the fixed shaft to rotate, the fixed shaft drives the heating module to rotate, and the heating module evenly heats the air, so that the replaced gas is discharged from the air outlet outside the device.

[0004] The above patent document states that ventilation can be performed inside the aging box, but the plastic aging test needs to be carried out continuously within a temperature range. Since there is a large difference between the air flow temperature inside the aging box and the air flow temperature outside the aging box, the temperature of the test items in the aging box may change significantly in a short period of time, making it impossible for the plastic to be tested to stabilize within a temperature range, thereby affecting the aging resistance test of the test items. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies of the existing technology and propose a plastic particle aging resistance testing box to solve the technical problem mentioned in the background technology that the plastic aging testing box of the existing technology can ventilate the inside of the aging box, but the plastic aging detection needs to be carried out continuously within a temperature range. Since the air flow temperature inside the aging box and the air flow temperature outside the aging box are quite different, the temperature of the test items in the aging box may change greatly in a short period of time, making it impossible for the plastic to be tested to be stable within a temperature range, affecting the detection of the aging resistance of the test items.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A plastic particle aging resistance test box includes a test box, a placement plate is fixedly provided in the test box, a plurality of placement holes for placing plastic particles are opened on the placement plate, two heating wires are provided in the test box for heating the gas in the test box, and the two heating wires are respectively located on both sides of the placement plate, a preheating box is fixedly provided on the test box and the preheating box is conductively connected to the test box, and a preheating component for preheating the gas is provided in the preheating box.

[0008] Working principle:

[0009] First, the operator places the plastic particles that need to be tested for aging in the placement hole, and then the operator starts the heating wire, which evenly heats both sides of the plastic particles. When the operator needs to ventilate the test box, the operator can conduct the hot air flow in the test box to the preheating component. The operator introduces external air into the preheating component. The hot air flow in the preheating component can preheat the external cold air flow, reducing the temperature difference between the external air flow and the internal air flow. Finally, the operator takes the tested plastic particles out of the test box.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] First, a placement plate and a placement hole are provided. The placement hole can be used to facilitate the placement of plastic particles to be tested. The movement of the plastic particles can be limited to a certain extent by the inner wall of the placement hole abutting against the outer wall of the plastic particles.

[0012] Second, a preheating component is provided. The preheating component can preheat the external cold air flow through the internal hot air flow when the gas in the detection box is ventilated, thereby reducing the temperature difference of the external cold air flow entering the detection box, so that the plastic particles to be detected are within a relatively stable temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0014] Figure 2 Schematic diagram of the structure of the return pipe and exhaust pipe.

[0015] Explanation of the accompanying drawings: detection box 1, placement plate 2, placement hole 3, heating wire 4, preheating box 5, partition 6, full-fin tube 7, fan 8, return pipe 9, air inlet pipe 10, exhaust pipe 11, filter box 12, activated carbon plate 13, air outlet pipe 14, baffle 15, through groove 16, bolt 17, nut 18, strip hole 19, bidirectional screw 20, guide rod 21, slider 22, motor 23, fan 24, upper chamber 25, lower chamber 26. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0017] Example:

[0018] like Figure 1 As shown, a plastic particle aging resistance test box includes a test box 1, a placement plate 2 is fixedly provided in the test box 1, and a plurality of placement holes 3 for placing plastic particles are opened on the placement plate 2. The placement holes 3 are convex, and the plastic particles to be tested can be placed in the placement holes 3. The movement of the plastic particles is restricted by the abutment between the inner wall of the placement hole 3 and the outer wall of the plastic particles. A baffle 15 is provided on the placement plate 2 to prevent the movement of the plastic particles. The baffle 15 can prevent the plastic particles from escaping from the placement holes 3. A plurality of through grooves 16 are opened on the baffle 15, and the plurality of through grooves 16 correspond to the plurality of placement holes 3 up and down. Through the cooperation of the through grooves 16 and the placement holes 3, the opposite sides of the plastic particles can be directly in contact with the hot air flow in the test box 1. A bolt 17 is fixed on the baffle 15, and the bolt 17 slides through the placement plate 2. A nut 18 is screwed on the bolt 17, and the nut 18 abuts against the placement plate 2. The position of the baffle 15 can be fixed by the bolt 17 and the nut 18. A temperature sensor is placed on the top of the baffle 15 near the plastic particles.

[0019] like Figure 1 As shown, the detection box 1 is provided with two heating wires 4 for heating the gas in the detection box 1, and the two heating wires 4 are respectively located on both sides of the placement plate 2. The heating wires 4 can generate heat to heat the plastic particles in the detection box 1. Fans 24 are fixed on the two sliders 22. The two fans 24 are used to blow the heat generated by the heating wires 4 to the plastic particles. The heat generated by the heating wires 4 can be blown to the plastic particles by the fans 24, so that the plastic particles are quickly raised to the temperature range to be detected, and the temperature range of the plastic particles to be detected can be adjusted by adjusting the wind speed of the fans 24.

[0020] like Figure 1 As shown, strip holes 19 are provided on both sides of the placement plate 2, a bidirectional screw 20 is rotated in the detection box 1, a guide rod 21 is fixed in the detection box 1, the bidirectional screw 20 and the guide rod 21 are parallel to each other and slide through the two strip holes 19 respectively, the two threaded sections of the bidirectional screw 20 are screwed with sliders 22 and the two sliders 22 are slidably connected to the guide rod 21, the two heating wires 4 are respectively fixed on the two sliders 22, a motor 23 is fixed at the bottom of the detection box 1 and the output end of the motor 23 is fixed to the bidirectional screw 20, the bidirectional screw 20 is driven by the motor 23, and the sliders 22 on the two threaded sections of the bidirectional screw 20 can approach and move away from each other, so that the sliders 22 can approach or move away from the plastic particles.

[0021] like Figure 1 and Figure 2As shown, a preheating box 5 is fixed on the detection box 1 and the preheating box 5 is conductively connected to the detection box 1. A preheating component for preheating the gas is provided in the preheating box 5. The preheating component includes a partition 6, a plurality of full-fin tubes 7, a fan 8, a return pipe 9, an air inlet pipe 10 and an exhaust pipe 11. The partition 6 is fixed in the preheating box 5 and the partition 6 divides the preheating box 5 into an upper chamber 25 and a lower chamber 26. The upper chamber 25 and the lower chamber 26 are not conductive to each other. A plurality of full-fin tubes 7 are evenly fixed on both sides of the partition 6. The two ends of the full-fin tubes 7 are respectively located in the upper chamber 25 and the lower chamber 26. The full-fin tubes 7 are prior art and will not be elaborated on here. The fan 8 is provided on the detection box 1 and the air outlet of the fan 8 is conductively connected to the upper chamber 25. The fan 8 can blow the external cold air flow into the interior of the upper chamber 25 and make the cold air The airflow collides with the full-fin tube 7 to take away the heat from the full-fin tube 7, and preheats the gas guided from the outside to the upper chamber 25. The return pipe 9 is arranged in the upper chamber 25, and the preheated gas in the upper chamber 25 can be guided into the detection box 1 through the return pipe 9 and the exhaust pipe 11. The two ends of the intake pipe 10 are respectively connected to the top of the detection box 1 and the lower chamber 26. The hot airflow in the detection box 1 can be guided to the lower chamber 26 through the intake pipe 10. The hot airflow contacts the full-fin tube 7, and the full-fin tube 7 takes away the heat of the hot airflow and transfers the heat to the full-fin tube 7 in the upper chamber 25. The exhaust pipe 11 is fixed in the detection box 1 and the exhaust pipe 11 is connected to the return pipe 9. The outside of the return pipe 9 and the intake pipe 10 are covered with thermal insulation material to reduce the heat dissipated to the outside when the airflow passes through.

[0022] like Figure 1 As shown, a filter box 12 is provided on the side of the preheating box 5 away from the return pipe 9. The filter box 12 is conductively connected to the preheating box 5. A plurality of removable activated carbon plates 13 are provided in the filter box 12. An air outlet pipe 14 is provided on one side of the filter box 12. The airflow that exchanges heat with the full-finned tube 7 in the lower chamber 26 can be directed into the filter box 12. The activated carbon plates 13 in the filter box 12 can adsorb particles in the airflow and discharge the gas after adsorption to the external space.

[0023] Working principle:

[0024] First, the operator places the plastic particles to be tested in the placement hole 3, and then the operator slides the baffle 15 through the placement plate 2 and screws the baffle 15 with the nut 18 and the bolt 17 to prevent the plastic particles from escaping from the placement hole 3. Then the operator starts the heating wire 4 and the fan 24. The heating wire 4 generates heat, and the fan 24 blows the heat generated by the heating wire 4 to the plastic particles. Due to the cooperation of the placement hole 3 and the through groove 16, both sides of the plastic particles can be evenly heated.

[0025] When ventilation is performed in the detection box 1, the hot air flow in the detection box 1 can be discharged into the lower chamber 26 in the preheating box 5 through the air inlet pipe 10, and the hot air flow contacts the full-fin tube 7 in the lower chamber 26. The full-fin tube 7 in the lower chamber 26 takes away the heat in the hot air flow and transfers the heat to the full-fin tube 7 in the upper chamber 25. Starting the fan 8 can blow the external cold air flow into the upper chamber 25, and the cold air flow contacts the full-fin tube 7 in the upper chamber 25 and takes away the heat on the full-fin tube 7. After preheating, the air flow in the upper chamber 25 is guided to the exhaust pipe 11 through the return pipe 9 and then guided into the detection box 1. The air flow in the lower chamber 26 will finally be guided into the filter box 12. The activated carbon plate 13 in the filter box 12 can adsorb the particles contained in the air flow, and the air flow after adsorption is finally discharged to the external space.

[0026] The starting motor 23 can drive the bidirectional screw 20, and the bidirectional screw 20 can drive the fan 24 and the heating wire 4 on the two sliders 22 to move closer to or away from the detected plastic particles, so as to facilitate the adjustment of the heat received by the plastic particles and to facilitate the plastic particles to be in a relatively stable temperature range.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A plastic particle aging resistance test box, characterized in that: The invention comprises a detection box (1), wherein a placement plate (2) is fixedly provided in the detection box (1), a plurality of placement holes (3) for placing plastic particles are opened on the placement plate (2), two electric heating wires (4) for heating the gas in the detection box (1) are provided in the detection box (1), and the two electric heating wires (4) are respectively located on both sides of the placement plate (2), a preheating box (5) is fixedly provided on the detection box (1), and the preheating box (5) is conductively connected to the detection box (1), and a preheating component for preheating the gas is provided in the preheating box (5).

2. The plastic particle aging resistance test box according to claim 1, characterized in that: The preheating assembly comprises a partition (6), a plurality of full-fin tubes (7), a fan (8), a return pipe (9), an air inlet pipe (10) and an exhaust pipe (11); the partition (6) is fixed in the preheating box (5) and the partition (6) divides the preheating box (5) into an upper chamber (25) and a lower chamber (26); the plurality of full-fin tubes (7) are evenly fixedly installed on both sides of the partition (6); the fan (8) is arranged on the detection box (1) and the air outlet of the fan (8) is conductively connected to the upper chamber (25); the return pipe (9) is conductively arranged in the upper chamber (25); the two ends of the air inlet pipe (10) are conductively connected to the top of the detection box (1) and the lower chamber (26) respectively; the exhaust pipe (11) is fixed in the detection box (1) and the exhaust pipe (11) is conductively connected to the return pipe (9).

3. The plastic particle aging resistance test box according to claim 2, characterized in that: A filter box (12) is provided on the side of the preheating box (5) away from the return pipe (9), the filter box (12) is conductively connected to the preheating box (5), a plurality of removable activated carbon plates (13) are provided in the filter box (12), and an air outlet pipe (14) is conductively provided on one side of the filter box (12).

4. The plastic particle aging resistance test box according to claim 1, characterized in that: The placement plate (2) is provided with a baffle (15) for preventing the plastic particles from moving. The baffle (15) is provided with a plurality of through slots (16), and the plurality of through slots (16) correspond to the plurality of placement holes (3) in a vertical direction.

5. The plastic particle aging resistance test box according to claim 4, characterized in that: A bolt (17) is fixed on the baffle (15) and the bolt (17) slides through the placement plate (2). A nut (18) is screwed on the bolt (17) and the nut (18) abuts against the placement plate (2).

6. The plastic particle aging resistance test box according to claim 1, characterized in that: Both sides of the placement plate (2) are provided with strip holes (19); a bidirectional screw (20) is rotatably provided in the detection box (1); a guide rod (21) is fixed in the detection box (1); the bidirectional screw (20) and the guide rod (21) are parallel to each other and slide through the two strip holes (19) respectively; two threaded sections of the bidirectional screw (20) are screwed with sliders (22) and the two sliders (22) are slidably connected to the guide rods (21); the two heating wires (4) are fixed on the two sliders (22) respectively; a motor (23) is fixed at the bottom of the detection box (1) and the output end of the motor (23) is fixed to the bidirectional screw (20).

7. The plastic particle aging resistance test box according to claim 6, characterized in that: A fan (24) is fixedly provided on each of the two sliding blocks (22), and the two fans (24) are used to blow the heat generated by the heating wire (4) toward the plastic particles.

Images