A kind of oil refining tank convenient for observation

Abstract

The present invention discloses an oil refining tank which is easy to observe, and relates to the technical field of bio-industry, comprising a refining tank, wherein a supporting leg is fixedly connected to the bottom of the refining tank, a fixing column is fixedly connected to the top of the refining tank, a motor is fixedly connected to the top of the fixing column, and a stirring visualization mechanism is arranged inside the refining tank; by arranging the stirring visualization mechanism, when a rotating shaft drives a connecting rod A and a connecting rod B to stir faster, the connecting rod B is thrown out farther, and then the slider is pushed to slide on the inner wall of a retaining ring farther, and the staff only needs to observe the distance that the slider is pushed out on the inner wall of the retaining ring during stirring to intuitively judge the stirring speed and situation of the connecting rod A and the connecting rod B on the liquid in the refining tank at this time.

Description

Technical Field

[0001] The invention relates to the technical field of biological industry, in particular to a fat refining tank which is easy to observe. Background Art

[0002] In actual oil production, oil producers are required to improve the quality of crude oil through refining to obtain high-quality oil products. This process is usually called oil refining, which is the process of removing impurities from oil.

[0003] The patent application with publication number CN212800270U describes a fat refining tank that is easy to observe, which belongs to the field of biological industry technology. The key points of the technical solution are that it includes a tank body, a feed pipe is connected to the top of the tank body, a discharge pipe is connected to the bottom of the tank body, a valve is provided on the discharge pipe, an observation tube made of a transparent material is provided on one side of the tank body, the observation tube is vertically arranged, the top end of the observation tube is connected to the top of the tank body, the bottom end of the observation tube is connected to the bottom of the tank body, and the observation tube is filled with the same fat as the inside of the tank body, so as to facilitate the observation of the liquid level of the alkali solution in the tank body and reduce the amount of fat discharged;

[0004] At present, when refining oil in an oil refining tank, it is necessary to stir the inside of the refining tank in advance. During stirring, it is difficult to set the glass material due to the need for sealing, so it is difficult to observe the internal stirring state and stirring conditions, which easily leads to the problem of uneven stirring. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a fat refining tank that is easy to observe, thereby achieving the purpose of solving the above-mentioned problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an oil refining tank that is easy to observe, comprising a refining tank, a support leg fixedly connected to the bottom of the refining tank, a fixed column fixedly connected to the top of the refining tank, a motor fixedly connected to the top of the fixed column, and a stirring visualization mechanism arranged inside the refining tank;

[0007] The stirring visualization mechanism comprises:

[0008] A rotating shaft, wherein the rotating shaft is a circular rod-shaped structure, one end of the rotating shaft passes through a fixed column and is fixedly connected to an output end of a motor, a connecting rod A is fixedly connected to an outer wall of the rotating shaft, a connecting rod B is slidably connected to an inner wall of the connecting rod A, a built-in spring is fixedly connected to the inner wall of the connecting rod A, and the inner wall of the connecting rod A is fixedly connected to one end of the connecting rod B through the built-in spring, and the rotating shaft is used to be driven by the motor to control the rotation of the connecting rod A;

[0009] The scraper is a vertical plate-shaped structure, one side of the scraper is fixedly connected to one end of the connecting rod B, the outer wall of the scraper is slidably connected to the inner wall of the refining tank, and a push block is fixedly connected to the outer wall of the scraper. The scraper is used to rotate and scrape the inner wall of the refining tank.

[0010] Preferably, a fixing rod is fixedly connected to the outer wall of the refining tank, the fixing rod is an L-shaped rod structure, and a retaining ring is fixedly connected to one end of the fixing rod.

[0011] Preferably, a slider is slidably connected to the inner wall of the retaining ring, a fixing ring is fixedly connected to the outer wall of the slider, a spring is fixedly connected to one side of the fixing ring, and one end of the spring is fixedly connected to one side of the retaining ring.

[0012] Preferably, the outer wall of the fixing ring is fixedly connected with a square plate, the outer wall of the sliding block is slidably connected with a fixing sleeve, and the outer wall of the fixing sleeve is fixedly connected with the inner wall of the refining tank.

[0013] Preferably, a sliding plate is fixedly connected to one side of the fixing ring, an outer wall of the sliding plate is slidably connected to an inner wall of the fixing sleeve, and an annular groove is formed on the outer wall of the fixing sleeve.

[0014] Preferably, a one-way valve A is provided on the outer wall of the fixed sleeve, a one-way valve B is provided on the outer wall of the fixed sleeve, the interior of the one-way valve A is connected with the interior of the fixed sleeve, the interior of the one-way valve B is connected with the interior of the fixed sleeve, and the outer wall of the connecting rod B is fixedly connected with a fixed telescopic rod.

[0015] Preferably, the outer wall of the connecting rod B is provided with a stirring mechanism, and the stirring mechanism includes a rotating ball. The outer wall of the connecting rod B is rotatably connected to the rotating ball, the outer wall of the rotating ball is fixedly connected to the hinged rod A, and the outer wall of the hinged rod A is fixedly connected to a circular sleeve.

[0016] Preferably, the outer wall of the circular sleeve is rotatably connected to a rotating ball A, the rotating ball A is fixedly connected to a hinged rod B, one end of the hinged rod B is fixedly connected to the rotating ball B, and the outer wall of the rotating ball B is rotatably connected to the outer wall of the connecting rod B.

[0017] The present invention provides a fat refining tank that is easy to observe, which has the following beneficial effects:

[0018] 1. The present invention provides a stirring visualization mechanism. When the rotating shaft drives the connecting rod A and the connecting rod B to stir faster, the connecting rod B is thrown out farther, and the slider is pushed to slide farther on the inner wall of the baffle ring. The staff only needs to observe the distance that the slider is pushed out on the inner wall of the baffle ring during stirring to intuitively judge the stirring speed and situation of the connecting rod A and the connecting rod B on the liquid in the refining tank at this time.

[0019] 2. The present invention provides a visual stirring mechanism, and can realize that the push block, the scraper and the connecting rod B are subjected to a certain reaction force and are pushed back to a part of the position through the collision between the push block and the slider, so that they vibrate under the reverse push of the built-in spring elastic force. Through continuous collision and vibration, the stirring effect in the refining tank is effectively improved, and at the same time, it is also effectively prevented that a variety of solutions adhere to the connecting rods A and B during stirring, resulting in an imbalance in the mixing ratio in the refining tank, and the attachments adhering to the connecting rods B, A and the scraper are shaken off to maintain the uniformity of mixing.

[0020] 3. The present invention sets a stirring visualization mechanism. When the slider drives the fixed ring to move, it will drive the square plate to move synchronously. When the square plate moves, one end of the square plate corresponds to different positions on the annular groove, so as to judge the overall displacement distance of the slider at this time. Then, by observing the positional relationship between the annular groove and the square plate, it can be judged whether the connecting rod B accurately stirs the refining tank at this time.

[0021] 4. The present invention sets a visual stirring mechanism to keep the slider as still as possible. By continuously contacting the slider with a plurality of push blocks, the slider can be kept in the pushed-out position by a slight push, thereby avoiding the problem that each time the slider is reset, the next push block needs to push the slider again to overcome the elastic force of the spring to move, causing large vibrations. When the connecting rod A and the connecting rod B in the refining tank are stirred, the slider can maintain a stable state, and the impact vibration between the push block and the slider is greatly reduced, thereby reducing noise and protecting the slider and the push block from damage.

[0022] 5. The present invention provides a stirring mechanism to achieve stirring of the solution by synchronously rotating the connecting rod B, the connecting rod A and the hinged rod A. When faster stirring is required, the hinged rod A and the hinged rod B are synchronously tilted and opened to increase the contact area with the solution in the refining tank, thereby ensuring that when a relatively viscous solution needs to speed up to improve the stirring efficiency, the hinged rod A and the hinged rod B are automatically opened to synchronously increase the stirring force of the solution. When the solution cannot be stirred quickly and violently, the connecting rod B will not be thrown out by the centrifugal force, and the hinged rod A and the hinged rod B will not be opened, thereby reducing the impact on the solution and maintaining a stirring effect suitable for it.

[0023] 6. The present invention provides a stirring mechanism. When the push block collides with the slider, it will reset backward due to the reaction force. Then, the connecting rod B will be thrown out again by the centrifugal force to pull the built-in spring to deform and slide out again. The small degree of movement generated when the push block collides with the slider and resets backward in this working state will also realize the layer-turning direction of the material in the refining tank through the left and right swing of the hinged rod A and the hinged rod B, and the material will be further tilted up and down while being stirred, rotated and vibrated to be broken up and turned over. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 The structure diagram of the stirring visualization mechanism of the present invention is shown in FIG. Figure 1 ;

[0026] Figure 3 The structure diagram of the stirring visualization mechanism of the present invention is shown in FIG. Figure 2 ;

[0027] Figure 4 The structure diagram of the stirring visualization mechanism of the present invention is shown in FIG. Figure 3 ;

[0028] Figure 5 This is a schematic diagram of the disassembled structure of the stirring visualization mechanism of the present invention;

[0029] Figure 6 The structure diagram of the stirring visualization mechanism of the present invention is shown in FIG. Figure 4 ;

[0030] Figure 7 For the present invention Figure 4 A magnified image of point A;

[0031] Figure 8 The motion state of the stirring visualization mechanism of the present invention Figure 1 ;

[0032] Fig. 9 The motion state of the stirring visualization mechanism of the present invention Figure 2 ;

[0033] Fig.10 The motion state of the stirring visualization mechanism of the present invention Figure 3 ;

[0034] Fig.11 It is a schematic diagram of the disassembled structure of the stirring mechanism of the present invention;

[0035] Fig.12 For the present invention Figure 6 The enlarged view of point B;

[0036] Fig.13It is a structural schematic diagram of the stirring mechanism of the present invention;

[0037] Fig.14 It is the motion state diagram of the stirring mechanism of the present invention.

[0038] In the figure: 1 supporting leg, 2 refining tank, 3 stirring visualization mechanism, 301 rotating shaft, 302 connecting rod A, 303 connecting rod B, 304 scraper, 305 push block, 306 slider, 307 fixing ring, 308 spring, 309 retaining ring, 310 fixing rod, 311 sliding plate, 312 fixing sleeve, 313 one-way valve A, 314 one-way valve B, 315 square plate, 316 annular groove, 317 fixed telescopic rod, 4 stirring mechanism, 402 rotating ball, 403 articulated rod A, 404 circular sleeve, 405 rotating ball A, 406 articulated rod B, 407 rotating ball B, 5 motor, 6 fixing column. DETAILED DESCRIPTION

[0039] Example 1: Please refer to Figure 1-4 The present invention provides a technical solution: a fat refining tank that is easy to observe, comprising a refining tank 2, a supporting leg 1 is fixedly connected to the bottom of the refining tank 2, a fixing column 6 is fixedly connected to the top of the refining tank 2, a motor 5 is fixedly connected to the top of the fixing column 6, and a stirring visualization mechanism 3 is arranged inside the refining tank 2;

[0040] The stirring visualization mechanism 3 comprises:

[0041] The rotating shaft 301 is a circular rod-shaped structure. One end of the rotating shaft 301 passes through the fixed column 6 and is fixedly connected to the output end of the motor 5. The outer wall of the rotating shaft 301 is fixedly connected to the connecting rod A302. The inner wall of the connecting rod A302 is slidably connected to the connecting rod B303. The inner wall of the connecting rod A302 is fixedly connected to an internal spring. The inner wall of the connecting rod A302 is fixedly connected to one end of the connecting rod B303 through the internal spring. The rotating shaft 301 is used to be driven by the motor 5 to control the rotation of the connecting rod A302;

[0042] The scraper 304 is a vertical plate-shaped structure. One side of the scraper 304 is fixedly connected to one end of the connecting rod B303. The outer wall of the scraper 304 is slidably connected to the inner wall of the refining tank 2. The outer wall of the scraper 304 is fixedly connected with a push block 305. The scraper 304 is used to rotate and scrape the inner wall of the refining tank 2.

[0043] When in use, the oil to be refined and the compound are put into the refining tank 2 through the feed port on the top of the refining tank 2, and then the motor 5 is started to control the rotating shaft 301 and the connecting rod A302 and the connecting rod B303 to rotate synchronously, and the liquid in the refining tank 2 is stirred and mixed through the rotation, thereby completing the material mixing work before precipitation refining;

[0044] Example 2: Please refer to Figure 1-10 On the basis of the first embodiment, the present invention provides a technical solution: a fixing rod 310 is fixedly connected to the outer wall of the refining tank 2, the fixing rod 310 is an L-shaped rod structure, and a retaining ring 309 is fixedly connected to one end of the fixing rod 310.

[0045] The inner wall of the retaining ring 309 is slidably connected to the slider 306 , the outer wall of the slider 306 is fixedly connected to the fixing ring 307 , one side of the fixing ring 307 is fixedly connected to the spring 308 , and one end of the spring 308 is fixedly connected to one side of the retaining ring 309 .

[0046] The outer wall of the fixing ring 307 is fixedly connected with a square plate 315 , the outer wall of the sliding block 306 is slidably connected with a fixing sleeve 312 , and the outer wall of the fixing sleeve 312 is fixedly connected with the inner wall of the refining tank 2 .

[0047] A sliding plate 311 is fixedly connected to one side of the fixing ring 307 . The outer wall of the sliding plate 311 is slidably connected to the inner wall of the fixing sleeve 312 . An annular groove 316 is formed on the outer wall of the fixing sleeve 312 .

[0048] A one-way valve A313 is provided on the outer wall of the fixed sleeve 312, a one-way valve B314 is provided on the outer wall of the fixed sleeve 312, the interior of the one-way valve A313 is connected with the interior of the fixed sleeve 312, the interior of the one-way valve B314 is connected with the interior of the fixed sleeve 312, and a fixed telescopic rod 317 is fixedly connected to the outer wall of the connecting rod B303.

[0049] During mixing, the connecting rod B303 drives the scraper 304 and the push block 305 to rotate synchronously. When the push block 305, the connecting rod B303 and the connecting rod A302 rotate, the connecting rod B303 slides outward on the outer wall of the connecting rod A302 and away from the connecting rod A302 due to the centrifugal force of the rotation, and at the same time pulls the inner wall of the connecting rod B303 and the built-in spring on one end of the connecting rod A302, so that the built-in spring is deformed and overcomes the elastic force of the spring to make the connecting rod B303 move outward on the outer wall of the connecting rod A302, thereby When the scraper 304 and the push block 305 slide outward centrifugally, the push block 305 will be pushed outward synchronously. After the push block 305 moves outward centrifugally, it will touch one end of the slider 306 and move the slider 306 through the arc surface of the slider 306. The slider 306 is moved and slides backward in the inner wall of the retaining ring 309. At the same time, the retaining ring 309 is fixed to the outer wall of the refining tank 2 by the fixing rod 310, so that the slider 306 is limited so that the slider 306 can only slide left and right on the inner wall of the retaining ring 309. The faster the rod B303 stirs, the farther the connecting rod B303 is thrown out, and the farther the slider 306 is pushed and slides on the inner wall of the retaining ring 309. The staff only needs to observe the distance that the slider 306 is pushed out on the inner wall of the retaining ring 309 during stirring to intuitively judge the stirring speed of the liquid in the refining tank 2 by the connecting rod A302 and the connecting rod B303 at this time, and can realize a certain degree of friction between the push block 305 and the scraper 304 and the connecting rod B303 through the collision between the push block 305 and the slider 306. The reaction force pushes the push block 305, the scraper 304, and the connecting rods B303 and A302 back to a certain position, and the push block 305, the scraper 304, and the connecting rods B303 and A302 vibrate under the elastic force of the built-in spring. Through continuous collision and vibration, the stirring effect in the refining tank 2 is effectively improved, and it also effectively prevents a variety of solutions from adhering to the connecting rods A302 and B303 during stirring, resulting in an unbalanced mixing ratio in the refining tank 2. The attachments adhering to the connecting rods B303, A302, and the scraper 304 are shaken off to maintain the uniformity of mixing;

[0050] When the slider 306 drives the fixed ring 307 to move, it drives the square plate 315 to move synchronously. When the square plate 315 moves, one end of the square plate 315 corresponds to different positions on the annular groove 316, so as to judge the overall displacement distance of the slider 306 at this time. Then, by observing the positional relationship between the annular groove 316 and the square plate 315, it can be judged whether the connecting rod B303 accurately stirs the refining tank 2 at this time.

[0051] When the slider 306 is moved, the sliding plate 311 is driven to slide in the fixed sleeve 312, and the air enters through the one-way valve A313 when the sliding plate 311 is separated from the fixed sleeve 312 and slides outward. After the push block 305 is separated from the slider 306, the slider 306 is rebounded by the elastic force of the spring 308, and the slider 306 is reset, which drives the sliding plate 311 to reset synchronously. The sliding plate 311 slides into the fixed sleeve 312 at this time and squeezes the air in the fixed sleeve 312 outward through the one-way valve B314. The one-way valve B314 has a small diameter, so the air is discharged very slowly, so that the slider 306 is reset. The speed is very slow. Then, after the last push block 305 collides with the slider 306, when the slider 306 is pushed out, until the next push block 305 collides with it, the slider 306 will not be directly rebounded to its original position by the elastic force of the spring 308, so that the slider 306 can be kept as immobile as possible. By continuously contacting the slider 306 with several push blocks 305, the slider 306 can be kept in the pushed-out position by a slight push, thereby avoiding the problem that each time the slider 306 is reset, the next push block 305 needs to push the slider 306 again to overcome the elastic force of the spring 308 to move, causing a large vibration. When the connecting rod A 302 and the connecting rod B 303 in the refining tank 2 are stirred, the slider 306 can maintain a stable state, and the impact vibration between the push block 305 and the slider 306 is greatly reduced, thereby reducing noise and protecting the slider 306 and the push block 305 from damage.

[0052] Example 3: Please refer to Figure 1-14 On the basis of Embodiment 1 and Embodiment 2, the present invention provides a technical solution: a stirring mechanism 4 is provided on the outer wall of the connecting rod B303, the stirring mechanism 4 includes a rotating ball 402, the outer wall of the connecting rod B303 is rotatably connected to the rotating ball 402, the outer wall of the rotating ball 402 is fixedly connected to the hinged rod A403, and the outer wall of the hinged rod A403 is fixedly connected to the circular sleeve 404.

[0053] The outer wall of the circular sleeve 404 is rotatably connected to a rotating ball A405, the rotating ball A405 is fixedly connected to a hinge rod B406, one end of the hinge rod B406 is fixedly connected to a rotating ball B407, and the outer wall of the rotating ball B407 is rotatably connected to the outer wall of the connecting rod B303.

[0054] At the same time, when the rotation speed increases so that the connecting rod B303, the scraper 304, and the push block 305 are pushed outward to different distances, the connecting rod B303 will pull the hinged rod A403 and the circular sleeve 404 to move different distances through the rotating ball 402 on the outer wall. Since the connecting rod A302 limits the rotating ball B407 and the hinged rod B406 on the connecting rod A302, when the connecting rod B303 is away from the connecting rod A302, the rotating ball A405 will be pulled through the rotating ball 402, the hinged rod A403, and the circular sleeve 404. When the rotating ball A405 is pulled, it will drive the hinged rod B406 to rotate in a circle on the center of the rotating ball B407, and the hinged rod B406 will rotate and warp upward, and the hinged rod A403 and the circular sleeve 404 will also warp with the hinged rod B406. The connecting rod B303, the connecting rod A302 and the hinged rod A403 are pushed upward to achieve the stirring of the solution by synchronous rotation. When faster stirring is required, the hinged rod A403 and the hinged rod B406 are synchronously tilted upward and opened to increase the contact area with the solution in the refining tank 2, thereby ensuring that when a relatively viscous solution needs to speed up the rotation speed to improve the stirring efficiency, the hinged rod A403 and the hinged rod B406 are automatically opened to simultaneously increase the stirring force of the solution. When the solution cannot be stirred quickly and violently, the connecting rod B303 will not be thrown out by the centrifugal force, and the hinged rod A403 and the hinged rod B406 will not be opened, thereby reducing the impact on the solution and maintaining the stirring effect adapted thereto.

[0055] When the push block 305 collides with the slider 306, it will reset backwards due to the reaction force, and then the connecting rod B303 will be thrown out again due to the centrifugal force, pulling the internal spring to deform and slide out again. In this working state, the small degree of movement generated when the push block 305 collides with the slider 306 and resets backwards will also realize the layer-turning direction of the material in the refining tank 2 through the left and right swinging of the hinged rod A403 and the hinged rod B406, and the material will be further tilted up and down while being stirred, rotated and vibrated to be scattered and turned over.

[0056] When the connecting rod B303 slides and extends inside the connecting rod A302, it will drive the fixed telescopic rod 317 to move together. When the fixed telescopic rod 317 is pulled, it will extend and extend the other connecting rod B303 synchronously, so that the three connecting rods B303 can be extended and retracted synchronously through the fixed telescopic rods 317 on the outer walls of the three connecting rods B303.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fat refining tank for easy observation, comprising a refining tank (2), wherein the bottom of the refining tank (2) is fixedly connected to a support leg (1), the top of the refining tank (2) is fixedly connected to a fixing column (6), and the top of the fixing column (6) is fixedly connected to a motor (5), characterized in that: The refining tank (2) is provided with a visual stirring mechanism (3); The stirring visualization mechanism (3) comprises: A rotating shaft (301), wherein the rotating shaft (301) is a circular rod-shaped structure, one end of the rotating shaft (301) passes through a fixed column (6) and is fixedly connected to an output end of a motor (5), an outer wall of the rotating shaft (301) is fixedly connected to a connecting rod A (302), an inner wall of the connecting rod A (302) is slidably connected to a connecting rod B (303), an inner wall of the connecting rod A (302) is fixedly connected to an internal spring, and the inner wall of the connecting rod A (302) is fixedly connected to one end of the connecting rod B (303) via the internal spring, and the rotating shaft (301) is used to be driven by the motor (5) to control the rotation of the connecting rod A (302); A scraper (304), the scraper (304) being a vertical plate-shaped structure, one side of the scraper (304) being fixedly connected to one end of a connecting rod B (303), the outer wall of the scraper (304) being slidably connected to the inner wall of the refining tank (2), the outer wall of the scraper (304) being fixedly connected to a push block (305), the scraper (304) being used to perform a rotational scraping function on the inner wall of the refining tank (2); A fixing rod (310) is fixedly connected to the outer wall of the refining tank (2); the fixing rod (310) is an L-shaped rod structure; one end of the fixing rod (310) is fixedly connected to a retaining ring (309); The inner wall of the retaining ring (309) is slidably connected to a slider (306), the outer wall of the slider (306) is fixedly connected to a fixing ring (307), one side of the fixing ring (307) is fixedly connected to a spring (308), and one end of the spring (308) is fixedly connected to one side of the retaining ring (309); The outer wall of the fixing ring (307) is fixedly connected to a square plate (315), the outer wall of the sliding block (306) is slidably connected to a fixing sleeve (312), and the outer wall of the fixing sleeve (312) is fixedly connected to the inner wall of the refining tank (2).

2. The oil refining tank that is easy to observe according to claim 1 is characterized in that: A sliding plate (311) is fixedly connected to one side of the fixing ring (307), an outer wall of the sliding plate (311) is slidably connected to an inner wall of a fixing sleeve (312), and an annular groove (316) is formed on the outer wall of the fixing sleeve (312).

3. The oil refining tank that is easy to observe according to claim 2 is characterized in that: A one-way valve A (313) is provided on the outer wall of the fixed sleeve (312), a one-way valve B (314) is provided on the outer wall of the fixed sleeve (312), the interior of the one-way valve A (313) is communicated with the interior of the fixed sleeve (312), the interior of the one-way valve B (314) is communicated with the interior of the fixed sleeve (312), and the outer wall of the connecting rod B (303) is fixedly connected to a fixed telescopic rod (317).

4. The oil refining tank that is easy to observe according to claim 3 is characterized in that: The outer wall of the connecting rod B (303) is provided with a stirring mechanism (4), the stirring mechanism (4) comprising a rotating ball (402), the outer wall of the connecting rod B (303) is rotatably connected to the rotating ball (402), the outer wall of the rotating ball (402) is fixedly connected to a hinged rod A (403), and the outer wall of the hinged rod A (403) is fixedly connected to a circular sleeve (404).

5. The oil refining tank that is easy to observe according to claim 4 is characterized in that: The outer wall of the circular sleeve (404) is rotatably connected to a rotating ball A (405), the rotating ball A (405) is fixedly connected to a hinged rod B (406), one end of the hinged rod B (406) is fixedly connected to a rotating ball B (407), and the outer wall of the rotating ball B (407) is rotatably connected to the outer wall of the connecting rod B (303).

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