An open flash point tester for the preparation of defoaming agents

Abstract

The invention belongs to the technical field of flash point testers, and discloses an open flash point tester for preparing defoaming agents, comprising a box body, wherein a fixed plate is fixedly connected to the middle part of the upper end of the box body, a limiting sleeve and a fixed frame are fixedly connected to the bottom end of the fixed plate, the fixed frame is located on the outside of the limiting sleeve, a Y-shaped mounting frame is slidably connected to the bottom end of the fixed plate, a limiting arc plate is installed on the Y-shaped mounting frame, a spring telescopic rod is fixedly connected between opposite surfaces of adjacent Y-shaped mounting frames, an L-shaped sliding frame is slidably connected to the bottom end of the middle part of the fixed frame, the L-shaped sliding frame is connected to the Y-shaped sliding frame through a first shock absorber, a limiting spring rod is fixedly connected between opposite surfaces of adjacent Y-shaped sliding frames, the inner side surface of the Y-shaped sliding frame is rotatably connected to the limiting roller, and a driving motor is fixedly connected to the bottom end of the front Y-shaped sliding frame. The invention solves the problems of uneven heating of a handle-type oil cup and incomplete positioning and fixing of the oil cup.

Description

Technical Field

[0001] The invention belongs to the technical field of flash point testers, and in particular relates to an open flash point tester for preparing a defoaming agent. Background Art

[0002] An open-mouth flash point tester is an instrument used to measure the flash point of a liquid. Flash point refers to the lowest temperature at which a liquid releases enough volatile gas under certain conditions to form a mixture of combustible gas and air and burn instantly under the action of an ignition source. An open-mouth flash point tester can measure the open-mouth flash point of a liquid, that is, during the test in the instrument, air is introduced to promote the formation of volatile gases. During the measurement, the sample is heated and ventilated through a nozzle at the same time until a momentary flash or flame appears. The main purpose of measuring the flash point is to evaluate the flammability and fire hazard of a liquid, which is very important for the safety of handling and storing liquids. In the use of existing open-mouth flash point testers, a handle-type oil cup is generally used. When heating, the internal liquid is often heated unevenly, resulting in inaccurate flash point monitoring. At the same time, the oil cup is not completely positioned and fixed, which can easily cause a fire and affect the overall use effect and safety. Summary of the invention

[0003] The present invention aims at solving the problems of uneven heating of the handle type oil cup and incomplete positioning and fixing of the oil cup in the prior art, and proposes the following technical solutions:

[0004] The invention relates to an open flash point tester for the preparation of a defoaming agent, comprising a box body, wherein a fixed plate is fixedly connected to the middle part of the upper end of the box body, and the bottom end of the fixed plate is fixedly connected to a limiting sleeve and a fixed frame, the fixed frame is located at the outside of the limiting sleeve, and the bottom end of the fixed plate is slidably connected to a Y-shaped mounting frame, one end of the Y-shaped mounting frame close to the limiting sleeve is fixedly connected to a limiting arc plate, a spring telescopic rod is fixedly connected between opposite surfaces of adjacent Y-shaped mounting frames, an L-shaped sliding frame is slidably connected to the middle bottom end of the fixed frame, a first shock absorber is fixedly connected to a surface of the L-shaped sliding frame close to the limiting sleeve, the other end of the first shock absorber is fixedly connected to the Y-shaped sliding frame, the limiting spring rod is fixedly connected between opposite surfaces of adjacent Y-shaped sliding frames, the inner surface of the Y-shaped sliding frame is rotatably connected to a limiting roller, and the bottom end of the front Y-shaped sliding frame is fixedly connected to a driving motor, and the output end of the driving motor is fixedly connected to the bottom end of the limiting roller.

[0005] As a preferred embodiment of the above technical solution, the front end of the front fixed frame is fixedly connected to the limit motor and the auxiliary motor in sequence from top to bottom, the output end of the limit motor passes through the fixed frame and is fixedly connected with a threaded screw, the outer surface of the threaded screw is threadedly connected to the inner surface of the front Y-shaped mounting frame, and the inner surface of the remaining Y-shaped mounting frame is slidably connected with a guide rod, and the two ends of the guide rod are respectively fixedly connected to the bottom end of the fixed plate and the inner surface of the fixed frame.

[0006] As a preferred embodiment of the above technical solution, the output end of the auxiliary motor passes through the fixed frame and is fixedly connected with a threaded guide column, the outer surface of the threaded guide column is threadedly connected to the inner surface of the front L-shaped sliding frame, the inner surface of the remaining L-shaped sliding frame is slidably connected with a guide column, the two ends of the guide column are fixedly connected to the inner surface of the fixed frame, and the bottom end of the Y-shaped sliding frame is slidably connected to the inner bottom end of the fixed frame.

[0007] As a preferred embodiment of the above technical solution, the upper end of the inner bottom of the limiting sleeve is abutted against the lower oil cup, the upper outer surface of the lower oil cup is rotatably connected to the upper oil cup, a shock absorbing assembly and a limiting guide assembly are arranged between the lower oil cup and the upper oil cup, the inner surface of the limiting arc plate is fitted with the outer surface of the upper oil cup, and the outer surface of the limiting roller is abutted against the outer surface of the lower oil cup.

[0008] As a preferred embodiment of the above technical solution, the shock absorbing assembly includes a second shock absorber fixedly connected to the top and bottom ends of the lower oil cup, the other end of the second shock absorber is fixedly connected to a U-shaped abutment, the outer surface of the U-shaped abutment and the top and bottom ends of the lower oil cup are rotatably connected to an auxiliary spring rod, the other end of the auxiliary spring rod is rotatably connected to a rotating frame, the inner side of the rotating frame is rotatably connected to an auxiliary roller, and the outer surfaces of the inner and outer auxiliary rollers are respectively abutted against the top outer surface of the lower oil cup and the inner surface of the upper oil cup.

[0009] As a preferred embodiment of the above technical solution, the limiting guide assembly includes a third shock absorber fixedly connected to the top and bottom ends of the lower oil cup, the other end of the third shock absorber is fixedly connected to a roller frame, the inner surface of the roller frame is rotatably connected to a guide roller, and the outer surface of the guide roller abuts against the inner surface of the upper oil cup.

[0010] As a preferred embodiment of the above technical solution, a handle is fixedly connected to the top of the oiling cup, a wooden sleeve is fixedly connected to the other end of the handle, a protective cover is fixedly connected to the top of the box, and an auxiliary positioning frame is fixedly connected to the middle of the front end of the protective cover.

[0011] As a preferred embodiment of the above technical solution, a rotating motor is fixedly connected to the inner surface of the box body, the output end of the rotating motor passes through the box body and is fixedly connected to a fixing rod, the inner surface of the fixing rod is bolted to an ignition arm, the top of the box body is fixedly connected to a U-shaped frame, the inner surface of the U-shaped frame is fixedly connected to a control valve, the output end of the control valve is pipe-connected to the input end of the ignition arm, and the other end of the control valve is pipe-connected to an external gas tank.

[0012] As a preferred embodiment of the above technical solution, the front end of the box is provided with a display screen, a voltage regulating knob, a sweep switch and a power switch from left to right in sequence, the voltage regulating knob is electrically connected to the external electromagnetic heater, and the output end of the external electromagnetic heater abuts against the bottom end of the limiting sleeve.

[0013] The beneficial effects of the present invention are:

[0014] By providing a Y-shaped mounting frame, a spring telescopic rod, a Y-shaped sliding frame and a limiting spring rod, when the limiting arc plate and the limiting roller respectively position the upper oil cup and the lower oil cup, the connecting rod structure formed by the Y-shaped mounting frame and the spring telescopic rod and the Y-shaped sliding frame and the limiting spring rod can ensure the synchronous movement of all the limiting arc plates and the limiting rollers, and can offset the vibration generated during heating and stirring, thereby improving the overall stability and reliability. At the same time, after the upper oil cup and the lower oil cup are limited, the limiting roller can be driven by starting the driving motor to drive the lower oil cup to rotate, thereby stirring the defoaming agent, ensuring uniform heating and reliable measurement.

[0015] By providing staggered shock-absorbing components and limit guide components, the auxiliary rollers and guide rollers can be used to make the lower oil cup and the upper oil cup rotate relative to each other, and the connecting rod structure formed between the U-shaped abutment, the auxiliary spring rod and the lower oil cup can reduce shock and protect the lower oil cup and improve the coaxiality of the lower oil cup and the upper oil cup, thereby improving the service life and overall effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a stereoscopic view of an open flash point tester for preparing a defoaming agent.

[0017] Figure 2 Shown is a partial structural diagram of an open flash point tester for preparing defoaming agents.

[0018] Figure 3 Shown is a partial structural diagram of an open flash point tester for preparing defoaming agents from another perspective.

[0019] Figure 4 The figure shows the internal structure of an open flash point tester for the preparation of defoaming agents.

[0020] Figure 5 Shown is a diagram of the internal structure of an open flash point tester for preparing defoaming agents from another perspective.

[0021] Figure 6 It shows Figure 5 Right view of .

[0022] Figure 7 It shows Figure 6 Cross-sectional view at AA in the middle.

[0023] Figure 8 It shows Figure 7 A local enlarged schematic diagram of point B in the middle.

[0024] Fig. 9 It shows Figure 7A partial enlarged schematic diagram of point C in the middle.

[0025] Fig.10 Shown is an exploded view of some parts of an open flash point tester for preparing defoaming agents.

[0026] Fig.11 Shown is a perspective view of the limiting guide assembly.

[0027] Fig.12 Shown is a perspective view of a shock absorbing assembly.

[0028] In the figure: 1, box body; 2, fixed plate; 3, limit sleeve; 4, fixed frame; 5, Y-type mounting frame; 6, limit arc plate; 7, spring telescopic rod; 8, threaded screw; 9, limit motor; 10, guide rod; 11, L-type sliding frame; 12, first shock absorber; 13, Y-type sliding frame; 14, limit spring rod; 15, limit roller; 16, drive motor; 17, threaded guide column; 18, auxiliary motor; 19, guide column; 20, lower oil cup; 21, upper oil cup; 22, shock absorption assembly; 2201, second shock absorber ; 2202, U-shaped abutment; 2203, auxiliary spring rod; 2204, rotating frame; 2205, auxiliary roller; 23, limit guide assembly; 2301, third shock absorber; 2302, roller frame; 2303, guide roller; 24, handle; 25, wooden sleeve; 26, protective cover; 27, auxiliary positioning frame; 28, rotating motor; 29, fixing rod; 30, ignition arm; 31, U-shaped frame; 32, control valve; 33, display screen; 34, pressure regulating knob; 35, sweep switch; 36, power switch. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0030] Example 1: The present invention provides an open flash point tester for preparing a defoamer, such as Figure 1-Figure 12As shown, it includes a box body 1, a fixed plate 2 is fixedly connected to the middle part of the upper end of the box body 1, a limited sleeve 3 and a fixed frame 4 are fixedly connected to the bottom end of the fixed plate 2, the fixed frame 4 is located on the outside of the limited sleeve 3, a Y-shaped mounting frame 5 is slidably connected to the bottom end of the fixed plate 2, one end of the Y-shaped mounting frame 5 close to the limited sleeve 3 is fixedly connected to the limited arc plate 6, a spring telescopic rod 7 is fixedly connected between the opposite surfaces of adjacent Y-shaped mounting frames 5, an L-shaped sliding frame 11 is slidably connected to the bottom end of the middle part of the fixed frame 4, a first shock absorber 12 is fixedly connected to one side of the L-shaped sliding frame 11 close to the limited sleeve 3, the other end of the first shock absorber 12 is fixedly connected to the Y-shaped sliding frame 13, and the adjacent Y-shaped sliding frames A limiting spring rod 14 is fixedly connected between the opposite surfaces of 13, the inner surface of the Y-shaped sliding frame 13 is rotatably connected to the limiting roller 15, the bottom end of the front Y-shaped sliding frame 13 is fixedly connected to a driving motor 16, the output end of the driving motor 16 is fixedly connected to the bottom end of the limiting roller 15, the front end of the front fixed frame 4 is fixedly connected to the limiting motor 9 and the auxiliary motor 18 in sequence from top to bottom, the output end of the limiting motor 9 passes through the fixed frame 4 and is fixedly connected to a threaded screw 8, the outer surface of the threaded screw 8 is threadedly connected to the inner surface of the front Y-shaped mounting frame 5, and the inner surfaces of the remaining Y-shaped mounting frames 5 are slidably connected to guide rods 10, and the two ends of the guide rods 10 are respectively connected to the fixed plate 2 The bottom end is fixedly connected to the inner surface of the fixing frame 4, which is convenient for limiting and fixing the upper oil cup 21. The output end of the auxiliary motor 18 passes through the fixing frame 4 and is fixedly connected with a threaded guide column 17. The outer surface of the threaded guide column 17 is threadedly connected to the inner surface of the front L-shaped sliding frame 11. The inner surface of the remaining L-shaped sliding frames 11 is slidably connected with a guide column 19. The two ends of the guide column 19 are fixedly connected to the inner surface of the fixing frame 4. The bottom end of the Y-shaped sliding frame 13 is slidably connected to the inner bottom end of the fixing frame 4, which is convenient for adjusting the limiting fixation of the lower oil cup 20 and the shock absorbing effect between the limiting roller 15 and the lower oil cup 20. By providing a Y-shaped mounting frame 5, a spring telescopic rod 7, and a Y-shaped sliding frame 13, The movable frame 13 and the limiting spring rod 14, when the limiting arc plate 6 and the limiting roller 15 respectively position the upper oil cup 21 and the lower oil cup 20, the connecting rod structure formed by the Y-shaped mounting frame 5 and the spring telescopic rod 7 and the Y-shaped sliding frame 13 and the limiting spring rod 14 can ensure the synchronous movement of all the limiting arc plates 6 and the limiting roller 15, and can offset the vibration generated during heating and stirring, thereby improving the overall stability and reliability. At the same time, after limiting the upper oil cup 21 and the lower oil cup 20, the limiting roller 15 can be driven by starting the driving motor 16 to drive the lower oil cup 20 to rotate, thereby stirring the defoaming agent, ensuring uniform heating and reliable measurement.

[0031] like Figure 1-Figure 12As shown, the upper end of the inner bottom of the limiting sleeve 3 is abutted with a lower oil cup 20, and the upper outer surface of the upper end of the lower oil cup 20 is rotatably connected with an upper oil cup 21. A shock absorbing component 22 and a limiting guide component 23 are arranged between the lower oil cup 20 and the upper oil cup 21. The inner surface of the limiting arc plate 6 is fitted with the outer surface of the upper oil cup 21, and the outer surface of the limiting roller 15 is abutted with the outer surface of the lower oil cup 20. The shock absorbing component 22 includes a second shock absorber 2201 fixedly connected to the top and bottom ends of the lower oil cup 20. The second shock absorber 2201 The other end is fixedly connected with a U-shaped abutment 2202, and the outer surface of the U-shaped abutment 2202 and the top and bottom ends of the lower oil cup 20 are rotatably connected with auxiliary spring rods 2203, and the other end of the auxiliary spring rod 2203 is rotatably connected with a rotating frame 2204, and the inner side of the rotating frame 2204 is rotatably connected with an auxiliary roller 2205, and the outer surfaces of the inner and outer auxiliary rollers 2205 are respectively in contact with the top outer surface of the lower oil cup 20 and the inner surface of the upper oil cup 21, and the upper oil cup 21 and the shock absorbing assembly 22 appear. When vibrating up and down, by changing the angle of the auxiliary spring rod 2203, the lower oil cup 20 and the upper oil cup 21 are limited and damped to ensure the overall reliability and improve the service life. The limiting guide assembly 23 includes a third shock absorber 2301 fixedly connected to the top and bottom ends of the lower oil cup 20, and the other end of the third shock absorber 2301 is fixedly connected to a roller frame 2302. The inner surface of the roller frame 2302 is rotatably connected to a guide roller 2303. The outer surface of the guide roller 2303 is in contact with the upper oil cup 21. The inner surface abuts against each other, and by providing staggered shock-absorbing components 22 and limiting guide components 23, the auxiliary roller 2205 and the guide roller 2303 can enable the lower oil cup 20 and the upper oil cup 21 to rotate relative to each other, and the connecting rod structure formed between the U-shaped abutment 2202, the auxiliary spring rod 2203 and the lower oil cup 20 can reduce shock and protect the lower oil cup 20 and the upper oil cup 21, while improving the coaxiality of the lower oil cup 20 and the upper oil cup 21, thereby improving the service life and the overall effect.

[0032] like Figure 1-Figure 12As shown, a handle 24 is fixedly connected to the top of the oil cup 21, and a wooden sleeve 25 is fixedly connected to the other end of the handle 24. A protective cover 26 is fixedly connected to the top of the box body 1, and an auxiliary clamping frame 27 is fixedly connected to the middle of the front end of the protective cover 26 for installing a thermometer for monitoring the temperature, which is convenient for personnel to record and observe. A rotating motor 28 is fixedly connected to the inner surface of the box body 1, and the output end of the rotating motor 28 passes through the box body 1 and is fixedly connected to a fixing rod 29, and the inner surface of the fixing rod 29 is bolted to an ignition arm 30. A U-shaped frame 31 is fixedly connected to the top of the box body 1. A control valve 32 is fixedly connected to the inner surface of the U-shaped frame 31, and the output end of the control valve 32 is pipe-connected to the input end of the ignition arm 30, and the other end of the control valve 32 is pipe-connected to the external gas tank, which is convenient for sweeping the top of the oil cup 21 to improve the overall work efficiency and reliability. A display screen 33, a pressure regulating knob 34, a sweeping switch 35 and a power switch 36 are provided at the front end of the box body 1 from left to right. The pressure regulating knob 34 is electrically connected to the external electromagnetic heater, and the output end of the external electromagnetic heater is abutted against the bottom end of the limit sleeve 3, which is convenient for rapid control and adjustment of the overall function.

[0033] Working principle: When in use, the staff holds the wooden sleeve 25 to put the lower oil cup 20 and the upper oil cup 21 filled with defoaming agent into the box body 1 and the limiting sleeve 3, and starts the limiting motor 9 and the auxiliary motor 18. The limiting motor 9 drives the limiting arc plate 6 to fix the upper oil cup 21 under the threaded connection between the threaded screw 8 and the Y-shaped mounting frame 5, and the auxiliary motor 18 drives the limiting roller 15 to limit the lower oil cup 20 under the threaded connection between the threaded guide column 17 and the L-shaped sliding frame 11. The limiting spring rod 14, when the limiting arc plate 6 and the limiting roller 15 respectively position the upper oil cup 21 and the lower oil cup 20, the connecting rod structure formed by the Y-shaped mounting frame 5 and the spring telescopic rod 7 and the Y-shaped sliding frame 13 and the limiting spring rod 14 can ensure the synchronous movement of all the limiting arc plates 6 and the limiting rollers 15, and can offset the vibration generated during heating and stirring, thereby improving the overall stability and reliability. At the same time, after the upper oil cup 21 and the lower oil cup 20 are limited, after the limit is completed, the external electromagnetic heater is started to position the lower oil cup 20 and the upper oil cup 21 The defoaming agent in the oil cup 20 is heated, and the driving motor 16 is started. The output end of the driving motor 16 drives the lower oil cup 20 to rotate, so as to stir the whole, ensure the uniform temperature of the whole, and improve the stability of the measurement. By providing the staggered shock absorbing components 22 and the limiting guide components 23, the lower oil cup 20 and the upper oil cup 21 can rotate relative to each other through the auxiliary roller 2205 and the guide roller 2303, and the connecting rod structure formed between the U-shaped abutment 2202, the auxiliary spring rod 2203 and the lower oil cup 20, the upper oil cup 21 and the shock absorbing components can rotate relative to each other. When 22 vibrates up and down, by changing the angle of the auxiliary spring rod 2203, the lower oil cup 20 and the upper oil cup 21 are limited and damped, thereby ensuring the overall reliability and improving the service life, and then the lower oil cup 20 and the upper oil cup 21 are damped and protected, and the coaxiality of the lower oil cup 20 and the upper oil cup 21 is improved, thereby improving the service life and the overall effect. After completing the stirring, press the sweeping switch 35, and the sweeping switch 35 controls the rotating motor 28 to drive the fixed rod 29 and the ignition arm 30 to sweep the top of the defoaming agent to complete the determination of the flash point.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. An open flash point tester for defoamer preparation, characterized in that: The invention comprises a box body (1), wherein a fixing plate (2) is fixedly connected to the middle of the upper end of the box body (1), the bottom end of the fixing plate (2) is fixedly connected to a limiting sleeve (3) and a fixing frame (4), the fixing frame (4) is located outside the limiting sleeve (3), the bottom end of the fixing plate (2) is slidably connected to a Y-shaped mounting frame (5), one end of the Y-shaped mounting frame (5) close to the limiting sleeve (3) is fixedly connected to a limiting arc plate (6), a spring telescopic rod (7) is fixedly connected between opposite surfaces of adjacent Y-shaped mounting frames (5), and an L-shaped sliding plate (6) is slidably connected to the bottom end of the middle part of the fixing frame (4). A frame (11) is provided, wherein a first shock absorber (12) is fixedly connected to a surface of the L-shaped sliding frame (11) close to the limiting sleeve (3), the other end of the first shock absorber (12) is fixedly connected to a Y-shaped sliding frame (13), a limiting spring rod (14) is fixedly connected between opposite surfaces of adjacent Y-shaped sliding frames (13), the inner surface of the Y-shaped sliding frame (13) is rotatably connected to a limiting roller (15), the bottom end of the front Y-shaped sliding frame (13) is fixedly connected to a driving motor (16), and the output end of the driving motor (16) is fixedly connected to the bottom end of the limiting roller (15); The upper end of the inner bottom of the limiting sleeve (3) is in contact with a lower oil cup (20), the upper outer surface of the lower oil cup (20) is rotatably connected to an upper oil cup (21), a damping assembly (22) and a limiting guide assembly (23) are provided between the lower oil cup (20) and the upper oil cup (21), the inner surface of the limiting arc plate (6) is in contact with the outer surface of the upper oil cup (21), and the outer surface of the limiting roller (15) is in contact with the outer surface of the lower oil cup (20).

2. The open flash point tester for defoamer preparation according to claim 1, characterized in that: The front end of the front fixing frame (4) is fixedly connected to a limit motor (9) and an auxiliary motor (18) in sequence from top to bottom, the output end of the limit motor (9) passes through the fixing frame (4) and is fixedly connected to a threaded screw (8), the outer surface of the threaded screw (8) is threadedly connected to the inner surface of the front Y-shaped mounting frame (5), and the inner surface of the remaining Y-shaped mounting frame (5) is slidably connected to a guide rod (10), and the two ends of the guide rod (10) are respectively fixedly connected to the bottom end of the fixing plate (2) and the inner surface of the fixing frame (4).

3. The open flash point tester for defoamer preparation according to claim 2, characterized in that: The output end of the auxiliary motor (18) passes through the fixed frame (4) and is fixedly connected to a threaded guide column (17); the outer surface of the threaded guide column (17) is threadedly connected to the inner surface of the front L-shaped sliding frame (11); the inner surface of the remaining L-shaped sliding frame (11) is slidably connected to a guide column (19); both ends of the guide column (19) are fixedly connected to the inner surface of the fixed frame (4); and the bottom end of the Y-shaped sliding frame (13) is slidably connected to the inner bottom end of the fixed frame (4).

4. The open flash point tester for defoamer preparation according to claim 1, characterized in that: The shock absorbing assembly (22) comprises a second shock absorber (2201) fixedly connected to the top and bottom ends of the lower oil cup (20); the other end of the second shock absorber (2201) is fixedly connected to a U-shaped abutment member (2202); the outer surface of the U-shaped abutment member (2202) and the top and bottom ends of the lower oil cup (20) are both rotatably connected to auxiliary spring rods (2203); the other end of the auxiliary spring rod (2203) is rotatably connected to a rotating frame (2204); the inner side of the rotating frame (2204) is rotatably connected to an auxiliary roller (2205); the inner and outer outer surfaces of the auxiliary rollers (2205) are respectively in abutment with the top outer surface of the lower oil cup (20) and the inner surface of the upper oil cup (21).

5. The open flash point tester for defoamer preparation according to claim 4, characterized in that: The position limiting guide assembly (23) comprises a third shock absorber (2301) fixedly connected to the top and bottom ends of the lower oil cup (20); the other end of the third shock absorber (2301) is fixedly connected to a roller frame (2302); the inner surface of the roller frame (2302) is rotatably connected to a guide roller (2303); the outer surface of the guide roller (2303) abuts against the inner surface of the upper oil cup (21).

6. The open flash point tester for defoamer preparation according to claim 1, characterized in that: The top end of the oiling cup (21) is fixedly connected to a handle (24), the other end of the handle (24) is fixedly connected to a wooden sleeve (25), the top end of the box body (1) is fixedly connected to a protective cover (26), and the middle part of the front end of the protective cover (26) is fixedly connected to an auxiliary positioning frame (27).

7. The open flash point tester for defoamer preparation according to claim 2, characterized in that: A rotating motor (28) is fixedly connected to the inner surface of the box body (1); the output end of the rotating motor (28) passes through the box body (1) and is fixedly connected to a fixing rod (29); the inner surface of the fixing rod (29) is bolted to an ignition arm (30); the top of the box body (1) is fixedly connected to a U-shaped frame (31); the inner surface of the U-shaped frame (31) is fixedly connected to a control valve (32); the output end of the control valve (32) is pipe-connected to the input end of the ignition arm (30); and the other end of the control valve (32) is pipe-connected to an external gas tank.

8. The open flash point tester for defoamer preparation according to claim 2, characterized in that: The front end of the box (1) is provided with a display screen (33), a voltage regulating knob (34), a sweep switch (35) and a power switch (36) in sequence from left to right. The voltage regulating knob (34) is electrically connected to an external electromagnetic heater, and the output end of the external electromagnetic heater abuts against the bottom end of the limiting sleeve (3).

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