Spontaneous combustion temperature tester

Abstract

The utility model relates to the technical field of spontaneous combustion temperature testers, and discloses a spontaneous combustion temperature tester which comprises a beaker, a support with the bottom extending to the inner side of the beaker is connected to the top of the beaker in a clamped mode, an asbestosed wire gauze located on the inner side of the beaker is placed on the inner side of the support, and an electric bakelite cover plate located above the support is buckled to the top of the beaker. A heat insulation assembly in contact with the outer side of the beaker is arranged at the bottom of the bakelite cover plate; the heat insulation assembly comprises four limiting rods, and the four limiting rods are all in threaded connection to the bottom of the bakelite cover plate and are annularly distributed at equal intervals. The spontaneous combustion temperature tester has the advantages that the heat concentration capacity is high, sample measurement is not interfered by related devices, energy is saved and the like, and solves the problems that a beaker is a glass product, the heat transfer capacity is high, most heat can be dissipated into air by the beaker in the heating process, the heating efficiency of a detection sample on an asbestosed wire gauze is low, and the like. Therefore, the problems that a test sample is heated unevenly, and more energy is consumed in the experiment process are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of spontaneous combustion temperature measuring instruments, specifically a spontaneous combustion temperature measuring instrument. Background Technology

[0002] The ZRY-1 auto-ignition temperature tester is assembled according to the relevant provisions of the HG / T2467.18-2003 standard. It is suitable for testing the auto-ignition temperature of pesticide fumigants. It is an essential testing device for pesticide manufacturers, research institutions, and testing and inspection organizations.

[0003] Existing spontaneous combustion temperature measuring instruments typically use an electric furnace to heat a beaker on an asbestos mesh to achieve spontaneous combustion. However, the beaker itself is made of glass, which has a strong heat transfer capacity. During the heating process, most of the heat is dissipated into the air, resulting in low heating efficiency for the sample on the asbestos mesh. This also leads to significant energy loss during the experiment. Therefore, a new spontaneous combustion temperature measuring instrument is proposed to address these issues. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a self-ignition temperature measuring instrument with advantages such as strong heat concentration and energy saving. It solves the problem that the beaker itself is a glass product with strong heat transfer capacity, and during the heating process, most of the heat is dissipated into the air by the beaker, resulting in low heating efficiency for the test sample on the asbestos mesh and significant energy loss during the experiment.

[0006] (II) Technical Solution

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A self-ignition temperature measuring instrument includes a beaker, the top of the beaker is snapped with a bracket extending to the inside of the beaker, an asbestos mesh is placed inside the bracket and located inside the beaker, the top of the beaker is fastened with an phenolic resin cover plate located above the bracket, and the bottom of the phenolic resin cover plate is provided with a heat insulation component that contacts the outside of the beaker.

[0008] The heat insulation component includes four limiting rods, all of which are threaded to the bottom of the phenolic resin cover and are distributed in a ring at equal intervals. The same heat insulation sleeve is fitted over the outer side of the four limiting rods. The bottom of the heat insulation sleeve is suspended. Four limiting pins are inserted into the outer side of the heat insulation sleeve and pass through the four limiting rods respectively. An observation window is provided on the front of the heat insulation sleeve.

[0009] The beneficial effects of this utility model are: by using a heat insulation sleeve that is suspended and does not contact the beaker, the heat emitted from the beaker is intercepted and kept around the beaker, thereby reducing heat loss, improving energy utilization efficiency, and increasing the accuracy of test results.

[0010] This self-ignition temperature measuring instrument has the advantages of strong heat concentration, uniform thermal temperature field, and energy saving.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, an electric furnace is installed at the bottom of the beaker, a lifting platform is installed at the bottom of the electric furnace, a support frame is installed on the outside of the lifting platform, a relay is installed on the outside of the support frame, a clamping frame is installed on the outside of the support frame, and an electrical contact thermometer with one end passing through the phenolic resin cover and extending above the asbestos mesh is clamped on the inside of the clamping frame. The electrical contact thermometer is electrically connected to the relay via a power cord, and a measuring thermometer located to the right of the electrical contact thermometer is also installed on the top of the phenolic resin cover.

[0013] The beneficial effect of adopting the above-mentioned further solution is that a rubber stopper for fixing the electric contact thermometer is also provided between the electric contact thermometer and the phenolic resin cover plate, and the electric contact thermometer is used to monitor the temperature inside the beaker in real time.

[0014] Furthermore, the support is arranged in a Z-shape, and the lower end of the support has three L-shaped supports, with the asbestos mesh located inside the three L-shaped supports.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the support frame is used to suspend the asbestos net.

[0016] Furthermore, the relay has two terminals on its front side, which are used to connect the power cord of the electrical contact thermometer.

[0017] The beneficial effect of adopting the above-mentioned further solution is that a relay is an electronic control device that plays a role in automatic adjustment, safety protection, and circuit switching in a circuit, and is mainly used to control electrical contact thermometers.

[0018] Furthermore, the lifting platform includes a base, a sliding box is fixedly connected to the top of the base, and a bidirectional threaded rod is rotatably connected inside the sliding box. A turntable located outside the sliding box is fixedly connected to the left side of the bidirectional threaded rod. Two screw hole plates symmetrically distributed on the left and right sides are threadedly connected to the outer side of the bidirectional threaded rod. Two scissor frames symmetrically distributed front and back are rotatably connected to the top of the two screw hole plates. The same sliding plate is slidably connected to the top of the two scissor frames.

[0019] The advantage of adopting the above-mentioned further solution is that the lifting platform facilitates the adjustment of the operating height of the electric furnace.

[0020] Furthermore, the mounting frame includes a base frame, which is U-shaped, and a vertical pole located behind the beaker is threadedly connected to the top of the base frame. The clamping frame is fixedly connected to the vertical pole by screws.

[0021] The beneficial effect of adopting the above-mentioned further solution is that the mounting frame is used to provide a suspended and fixed position for external auxiliary equipment, so that the auxiliary equipment can be mounted above the beaker. Attached Figure Description

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

[0023] Figure 2 This is a front view of the connection structure between the heat insulation component and the phenolic resin cover plate of this utility model;

[0024] Figure 3 This is a sectional view of the internal structure of the lifting platform of this utility model;

[0025] Figure 4 This is an enlarged view of the structure at point A of this utility model.

[0026] In the diagram: 1. Beaker; 2. Support; 3. Asbestos mesh; 4. Phenolic revetment cover; 5. Insulation component; 501. Limiting rod; 502. Limiting pin; 503. Insulation sleeve; 504. Observation window; 6. Electric furnace; 7. Relay; 8. Lifting platform; 801. Base; 802. Sliding box; 803. Turntable; 804. Scissor bracket; 805. Slide plate; 806. Screw hole plate; 807. Bidirectional threaded rod; 9. Erection frame; 901. Base frame; 902. Upright pole; 10. Clamping frame; 11. Electrical contact thermometer; 12. Terminal block; 13. Measuring thermometer. Detailed Implementation

[0027] 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.

[0028] In the embodiments, by Figure 1-4The present invention provides a self-ignition temperature measuring instrument, comprising a beaker 1, a support 2 extending to the inside of the beaker 1 and snapped onto the top of the beaker 1, an asbestos mesh 3 placed inside the support 2 and located inside the beaker 1, an phenolic resin cover 4 located above the support 2 and a heat insulation component 5 in contact with the outside of the beaker 1 at the bottom of the phenolic resin cover 4.

[0029] The heat insulation component 5 includes four limiting rods 501. The four limiting rods 501 are all threaded to the bottom of the phenolic resin cover plate 4 and are distributed in a ring at equal intervals. The same heat insulation sleeve 503 is sleeved on the outside of the four limiting rods 501. The bottom of the heat insulation sleeve 503 is suspended. Four limiting pins 502 are inserted into the outside of the heat insulation sleeve 503 and pass through the four limiting rods 501 respectively. An observation window 504 is opened on the front of the heat insulation sleeve 503.

[0030] An electric furnace 6 is installed at the bottom of beaker 1. A lifting platform 8 is installed at the bottom of the electric furnace 6. A support frame 9 is installed on the outside of the lifting platform 8. A relay 7 is installed on the outside of the support frame 9. A clamping frame 10 is installed on the outside of the support frame 9. An electric contact thermometer 11 with one end passing through the phenolic resin cover plate 4 and extending to the top of the asbestos mesh 3 is clamped on the inside of the clamping frame 10. The electric contact thermometer 11 is electrically connected to the relay 7 through a power cord. A measuring thermometer 13 located to the right of the electric contact thermometer 11 is also installed on the top of the phenolic resin cover plate 4.

[0031] A rubber stopper for fixing the electric contact thermometer 11 is also provided between the electric contact thermometer 11 and the phenolic resin cover plate 4. The electric contact thermometer 11 is used to monitor the temperature inside the beaker 1 in real time.

[0032] The support 2 is arranged in a Z-shape, and the lower end of the support 2 has three L-shaped supports. The asbestos net 3 is located inside the three L-shaped supports.

[0033] Support 2 is used to suspend and install asbestos net 3;

[0034] The front of the relay 7 has two terminals 12, which are used to connect the power cord of the electrical contact thermometer 11.

[0035] Relay 7 is an electronic control device that plays a role in automatic adjustment, safety protection, and circuit switching in the circuit. It is mainly used to control the electrical contact thermometer 11.

[0036] The lifting platform 8 includes a base 801, a sliding box 802 fixedly connected to the top of the base 801, a bidirectional threaded rod 807 rotatably connected inside the base 801, a turntable 803 located outside the sliding box 802 fixedly connected to the left side of the bidirectional threaded rod 807, two screw hole plates 806 symmetrically distributed on the left and right sides of the outer side of the bidirectional threaded rod 807, two scissor frames 804 symmetrically distributed in front and behind the top of the two screw hole plates 806, and the same sliding plate 805 slidably connected to the top of the two scissor frames 804.

[0037] The lifting platform 8 facilitates adjustment of the operating height of the electric furnace 6;

[0038] The support frame 9 includes a base frame 901, which is U-shaped. The top of the base frame 901 is threadedly connected to a vertical rod 902 located behind the beaker 1. The clamping frame 10 is fixedly connected to the vertical rod 902 by screws.

[0039] The mounting frame 9 is used to provide a suspended and fixed position for external auxiliary equipment, so that the auxiliary equipment can be mounted above the beaker 1.

[0040] Working principle:

[0041] Step 1: After assembling the frame 9, place the lifting platform 8 inside the U-shape of the base frame 901, and rotate the turntable 803 to drive the bidirectional threaded rod 807 to rotate, thereby adjusting the height of the scissor frame 804, and thus adjusting the height of the electric furnace 6 above the slide plate 805. Then fix the clamping frame 10 to the outside of the upright 902, and fix the electric contact thermometer 11 to the inside of the clamping frame 10. Place the bracket 2 inside the beaker 1, and place the asbestos mesh 3 inside the bracket 2. Then fasten the phenolic resin cover plate 4 on top of the beaker 1, and then allow the electric contact thermometer 11 to pass through the phenolic resin cover plate 4 and be inserted into the beaker 1, positioned above the asbestos mesh 3, and insert the measuring thermometer 13.

[0042] Step 2: Weigh 1.0g of sample and place it in the center of the asbestos mesh 3. Cover the beaker 1 with the phenolic resin beaker lid 4, insert the measuring thermometer 13, connect and fix the electric contact thermometer 11, and ensure that the mercury heads of the two thermometers are in contact with the asbestos mesh 3 on which the sample is placed. Adjust the adjusting cap on the electric contact thermometer 11 so that the upper edge of the indicating iron reaches 100℃±5℃. Turn on the relay 7 and the electric furnace 6 starts heating. When the relay 7 makes a "kick, tap" sound, it means that the electric contact thermometer 11 has measured the temperature on the asbestos mesh 3 to reach 100℃. After the temperature stabilizes, use the electric contact thermometer 11 to control the temperature rise and speed. Adjust the electric contact thermometer 11 at a rate of 5℃~10℃ per minute. When it approaches the smoking temperature, adjust the rate of rise to 1℃~2℃ per minute. At the same time, observe the sample and the measuring thermometer 13. The temperature indicated by the measuring thermometer 13 at the moment the sample smokes is the natural temperature of the sample.

[0043] Step 3: During the experiment, when the electric furnace 6 heats the beaker 1, the heat is concentrated inside the beaker 1 through the heat insulation sleeve 503, which improves the heating efficiency of the sample. At the same time, the state of the sample on the asbestos mesh 3 can be observed in real time through the observation window 504 during the heating process.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-ignition temperature measuring instrument, comprising a beaker (1), characterized in that: The top of the beaker (1) is fitted with a bracket (2) whose bottom extends to the inside of the beaker (1). An asbestos mesh (3) is placed inside the bracket (2) and located inside the beaker (1). The top of the beaker (1) is fastened with an phenolic resin cover plate (4) located above the bracket (2). The bottom of the phenolic resin cover plate (4) is provided with a heat insulation component (5) that contacts the outside of the beaker (1). The heat insulation component (5) includes four limiting rods (501). The four limiting rods (501) are all threaded to the bottom of the phenolic resin cover plate (4) and are distributed in a ring at equal intervals. The same heat insulation sleeve (503) is sleeved on the outside of the four limiting rods (501). The bottom of the heat insulation sleeve (503) is suspended. Four limiting pins (502) are inserted into the outside of the heat insulation sleeve (503) and pass through the four limiting rods (501) respectively. An observation window (504) is opened on the front of the heat insulation sleeve (503).

2. The spontaneous combustion temperature measuring instrument according to claim 1, characterized in that: An electric furnace (6) is provided at the bottom of the beaker (1), a lifting platform (8) is provided at the bottom of the electric furnace (6), a support frame (9) is provided on the outside of the lifting platform (8), a relay (7) is provided on the outside of the support frame (9), a clamping frame (10) is provided on the outside of the support frame (9), and an electric contact thermometer (11) with one end passing through the phenolic resin cover plate (4) and extending to the top of the asbestos mesh (3) is clamped on the inside of the clamping frame (10). The electric contact thermometer (11) is electrically connected to the relay (7) through a power cord. A measuring thermometer (13) located to the right of the electric contact thermometer (11) is also provided on the top of the phenolic resin cover plate (4).

3. The spontaneous combustion temperature measuring instrument according to claim 2, characterized in that: The support (2) is arranged in a Z-shape, and the lower end of the support (2) has three L-shaped supports. The asbestos net (3) is located inside the three L-shaped supports.

4. The spontaneous combustion temperature measuring instrument according to claim 2, characterized in that: The relay (7) has two terminals (12) on its front side, which are used to connect the power cord of the electrical contact thermometer (11).

5. The spontaneous combustion temperature measuring instrument according to claim 2, characterized in that: The lifting platform (8) includes a base (801), a sliding box (802) is fixedly connected to the top of the base (801), and a bidirectional threaded rod (807) is rotatably connected inside the base (801). A turntable (803) located outside the sliding box (802) is fixedly connected to the left side of the bidirectional threaded rod (807). Two screw hole plates (806) are threadedly connected to the outer side of the bidirectional threaded rod (807) and are symmetrically distributed from left to right. Two scissor frames (804) are rotatably connected to the top of the two screw hole plates (806) and are symmetrically distributed from front to back. The same sliding plate (805) is slidably connected to the top of the two scissor frames (804).

6. The spontaneous combustion temperature measuring instrument according to claim 2, characterized in that: The mounting frame (9) includes a base frame (901), which is U-shaped. The top of the base frame (901) is threadedly connected to a vertical rod (902) located behind the beaker (1). The clamping frame (10) is fixedly connected to the vertical rod (902) by screws.

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