Automatic height measuring sampler for grease sample

Abstract

The invention discloses an automatic height measuring sampler for grease samples in the technical field of grain detection, which comprises a rack, and a speed reducing motor, a reel, a fixed pulley and a controller which are arranged on the rack, the reel is in transmission connection with a rotating shaft of the speed reducing motor, a lifting rope on the reel bypasses the fixed pulley and then is connected with a plumb bob or a sampling barrel through a lifting hook, and the controller is connected with the plumb bob or the sampling barrel. The fixed pulley is connected with the rack through a tension sensor, and the gear motor and the tension sensor are electrically connected with the controller. The speed reducing motor is used for winding and unwinding the lifting rope, so that the winding and unwinding length of the lifting rope can be recorded, the labor intensity of workers can be reduced, and the sampling efficiency is improved; the lifting rope bypasses the fixed pulley with the tension sensor and then is connected with the plumb bob, the tension sensor can generate tension sudden change when the plumb bob is just in contact with the liquid level and the bottom of the oil tank in the descending process, and the grease depth can be obtained and a sampling point can be determined by recording the length of the lifting rope between two times of tension sudden change. Therefore, the sampling accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grain detection, in particular to an automatic height measuring sampler for oil samples. Background Art

[0002] At present, when sampling and testing liquids such as grease, it is usually required to take samples in three layers: upper, middle and lower. The upper and lower layers are 30 to 50 cm away from the top / bottom surface. After 7 samplings in each layer at a ratio of 2:3:2, the samples are fully mixed and then divided into about 500 ml samples for inspection. At present, oil tank sampling is basically done manually, using a rope or height gauge to connect the sampling barrel, lowering it to a specified height for sampling and then lifting it up. Since the oil tank is high and the amount of grease stored in the oil tank is uncertain, the sampling point cannot be accurately grasped, and due to the resistance of the grease, when the rope or height gauge is lifted after sampling, the labor intensity of the workers is high and the work efficiency is low. Summary of the invention

[0003] In order to overcome the above-mentioned deficiencies in the existing oil sample sampling, the technical problem to be solved by the present invention is to provide an automatic height measuring oil sample sampling device which can improve the accuracy and efficiency of sampling.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] The invention discloses an automatic height measuring sampler for oil and grease samples, comprising a frame, a reduction motor, a winding wheel, a fixed pulley and a controller arranged on the frame, wherein the winding wheel is connected to the rotating shaft of the reduction motor in a driving manner, and the rope on the winding wheel is connected to a plumb bob or a sampling bucket through a hook after passing through the fixed pulley, and the fixed pulley is connected to the frame through a tension sensor, and the reduction motor and the tension sensor are electrically connected to the controller, and the controller is configured to use two sudden tension changes detected by the tension sensor when the plumb bob contacts the liquid surface and the tank bottom as the starting points of the recording, so as to determine the depth of the oil in the oil tank and the sampling position, and then the reduction motor can be controlled to send the sampling bucket to the sampling position for sampling.

[0006] Furthermore, a position sensor electrically connected to the controller is provided on the frame, and the controller is configured to stop the reduction motor when the position sensor detects the position of the plumb bob or the sampling barrel during the retraction process of the plumb bob or the sampling barrel.

[0007] Furthermore, the winding wheel is rotatably arranged on a frame, and the reduction motor drives the winding wheel to rotate via a synchronous belt.

[0008] Furthermore, the sling is a tape measure.

[0009] Furthermore, an oil scraping chuck is provided on the frame, and the lifting rope passes through the oil scraping chuck after passing around the fixed pulley and is then connected to the plumb bob or the sampling barrel.

[0010] Furthermore, a handle is provided on the top of the frame, and casters are provided on the bottom of the frame.

[0011] Furthermore, a storage rack for storing plumb bobs and sampling barrels is provided on the side of the frame.

[0012] Furthermore, a fixing frame which can be sleeved on the oil tank opening is provided at the bottom of the frame, and a clamping screw which can press the fixing frame onto the oil tank opening is provided next to the fixing frame.

[0013] The beneficial effects of the present invention are: utilizing a reduction motor to drive the winding wheel to rotate to retract and release the lifting rope, which can not only record the retracted and released length of the lifting rope, but also reduce the labor intensity of workers and improve the sampling efficiency; the lifting rope is passed around a fixed pulley with a tension sensor and then connected to a plumb bob, and when the plumb bob just touches the liquid surface and the bottom of the oil tank during the descent process, a sudden change in tension will occur in the tension sensor, and the grease depth can be obtained by recording the length of the lifting rope between two sudden changes in tension, thereby accurately calculating the sampling point, and the subsequent reduction motor can also accurately send the sampling barrel to the sampling position, thereby improving the accuracy of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0015] Figure 2 It is a front view of the present invention;

[0016] Figure 3 It is a structural diagram of the oil tank mouth;

[0017] Figure 4 It is a schematic diagram of the bottom structure of the present invention.

[0018] Marked in the figure are, 1-frame, 2-reduction motor, 3-winding wheel, 4-fixed pulley, 5-controller, 6-plumb bob, 7-sampling barrel, 8-position sensor, 9-oil tank mouth, 11-oil scraper chuck, 12-handle, 13-castor, 14-storage rack, 15-fixed rack, 16-clamping screw, 21-synchronous belt, 31-suspension rope, 41-tension sensor. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings.

[0020] It should be noted that if there are directional indication terms in the present invention, such as up, down, left, right, front, and back directions and orientation terms, they are for the purpose of facilitating the description of the relative position relationship between components, and are not specific to the absolute position of the related components or the position relationship between components. They are only used to explain the relative position relationship and movement of the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly. If there are terms related to quantity in the present invention, such as "multiple", "multiple", "several", etc., they specifically refer to two or more.

[0021] like Figure 1 , Figure 2 As shown, the automatic height measuring sampler for oil samples provided by the present invention includes a frame 1, and a reduction motor 2, a winding wheel 3, a fixed pulley 4 and a controller 5 arranged on the frame 1, the winding wheel 3 is connected to the rotating shaft of the reduction motor 2, the hanging rope 31 on the winding wheel 3 is connected to the plumb bob 6 or the sampling bucket 7 through a hook after passing through the fixed pulley 4, the fixed pulley 4 is connected to the frame 1 through a tension sensor 41, the reduction motor 2 and the tension sensor 41 are electrically connected to the controller 5, and the controller 5 is configured to obtain the retracted and extended length of the hanging rope 31 according to the number of revolutions of the reduction motor 2, and can use the two sudden tension changes detected by the tension sensor 41 when the plumb bob 6 contacts the liquid surface and the tank bottom as the starting points of the recording, so as to determine the depth of the oil in the oil tank and the sampling position, and then the reduction motor 2 can be controlled to send the sampling bucket 7 to the sampling position for sampling.

[0022] The present invention mainly comprises two steps when in use, namely height measurement and sampling.

[0023] The height measurement process is: first place the entire device above the oil tank mouth 9, and hang the plumb bob 6 on the hook of the suspension rope 31, then start the reduction motor 2 to drive the winding wheel 3 to rotate, so that the plumb bob 6 slowly and evenly descends from the initial position. When the plumb bob 6 contacts the liquid surface, due to the buoyancy, the tension value detected by the tension sensor 41 will change suddenly. The controller 5 uses this moment as the recording starting point, and determines the height from the initial position to the recording starting point according to the number of turns of the reduction motor 2. Then the plumb bob 6 continues to descend until it contacts the bottom of the tank, and the tension value will change suddenly again. The controller 5 uses this moment as the recording end point. The controller 5 converts the number of turns of the reduction motor 2 from the recording starting point to the recording end point into the length of the suspension rope 31 descent, that is, the height of the liquid surface, and can determine the positions of the upper, middle and lower sampling points according to the sampling requirements. During this period, the number of turns that the reduction motor 2 needs to rotate from the initial position to each sampling position can be converted. After completing the above process, the reduction motor 2 is reversed to recover the plumb bob 6 to the initial position.

[0024] The sampling process is: remove the plumb bob 6 and replace it with the sampling barrel 7. The bottom of the sampling barrel 7 is provided with a one-way valve that opens upwards, and the top is provided with an opening or an open structure. The controller 5 controls the reduction motor 2 to lower the sampling barrel 7 according to the sampling position determined by the height measurement process. After the sampling barrel 7 reaches the sampling position, the reduction motor 2 reverses and pulls up the sampling barrel 7 to complete one sampling. Repeat the above steps until 7 sampling operations are completed.

[0025] The initial position can be determined by manually controlling the reduction motor 2 to stop. Since the structure itself is not high, the error range is not very large. The preferred solution is as follows: Figure 2 As shown, a position sensor 8 electrically connected to the controller 5 is also provided on the frame 1, and the position sensor 8 is arranged on the path that the plumb bob 6 or the sampling barrel 7 will pass through, and the controller 5 is configured to stop the reduction motor 2 when the position sensor 8 detects the position of the plumb bob 6 or the sampling barrel 7 during the retraction process of the plumb bob 6 or the sampling barrel 7. In this way, the reduction motor 2 can be automatically stopped, the control is more accurate, and it is conducive to automatic control.

[0026] In order to make the overall structure more perfect, the present invention also provides the following specific implementation methods.

[0027] As for the installation method of the winding wheel 3, it can be directly fixed on the rotating shaft of the reduction motor 2, or the winding wheel 3 can be rotatably set on the frame 1, and the reduction motor 2 drives the winding wheel 3 to rotate through the synchronous belt 21. The synchronous belt 21 can ensure that the winding wheel 3 rotates synchronously with the reduction motor 2, so as to calculate the retracted and extended length of the suspension rope 31, and is also conducive to the replacement and maintenance of the winding wheel 3.

[0028] For the hanging rope 31, the preferred solution of the present invention is a tape measure with sufficient strength. The tape measure is a flat structure, which is easier to store, and has scales on it, which can facilitate workers to intuitively understand the sampling position and perform comparative testing.

[0029] When the hanging rope 31 is recovered, more grease will be attached, which is easy to contaminate the winding wheel 3. Therefore, an oil scraper chuck 11 can be set on the frame 1, and the hanging rope 31 passes through the oil scraper chuck 11 after passing through the fixed pulley 4 and then connected to the plumb bob 6 or the sampling barrel 7. The oil scraper chuck 11 can be pressed on the hanging rope 31 by a spring structure. Another reason for using a tape measure for the hanging rope 31 is that the oil scraper chuck 11 can be better pressed on both sides of the tape measure, so as to better scrape off the grease on its surface.

[0030] In addition, in order to facilitate operation and understanding of the working process of the equipment, the controller 5 includes a display screen and a control panel. The display screen can display information such as the oil tank depth, sampling position and sampling times, and the control panel is used for workers to operate the equipment to perform operations such as height measurement and sampling.

[0031] In order to facilitate the movement of the equipment, a handle 12 is provided on the top of the frame 1, and casters 13 are provided at the bottom of the frame 1. After the casters 13 are used, the equipment may be unstable during the tooling process. Therefore, in order to improve the stability, Figure 3 , Figure 4 As shown, a fixing frame 15 that can be sleeved on the oil tank opening 9 is provided at the bottom of the frame 1, and a clamping screw 16 is provided next to the fixing frame 15. The fixing frame 15 is provided with an opening slightly larger than the outer diameter of the oil tank opening 9, so that the fixing frame 15 can be sleeved on the oil tank opening 9 conveniently. The clamping screw 16 is threadedly connected to the fixing frame 15 through the nut on the fixing frame 15. By rotating the clamping screw 16 so that its end is pressed against the side wall of the oil tank opening 9, the fixing frame 15 can be fixedly connected to the oil tank opening 9, ensuring that the equipment will not move during operation. In addition, in order to facilitate the storage of the plumb bob 6 and the sampling barrel 7, a storage rack 14 for storing the plumb bob 6 and the sampling barrel 7 is provided on the side of the frame 1.

Claims

1. Automatic height measuring sampler for grease samples, characterized by: The invention comprises a frame (1), a reduction motor (2), a winding wheel (3), a fixed pulley (4) and a controller (5) arranged on the frame (1); the winding wheel (3) is connected to the rotating shaft of the reduction motor (2); a suspension rope (31) on the winding wheel (3) passes around the fixed pulley (4) and is connected to a plumb bob (6) or a sampling bucket (7) through a suspension hook; the fixed pulley (4) is connected to the frame (1) through a tension sensor (41); the reduction motor (2) and the tension sensor (41) are connected to the frame (1); The sensor (41) is electrically connected to the controller (5). The controller (5) is configured to obtain the retracted length of the suspension rope (31) according to the number of revolutions of the reduction motor (2), and to use the two moments of sudden tension changes when the plumb bob (6) contacts the liquid surface and the tank bottom detected by the tension sensor (41) as the starting point of recording, thereby determining the depth of the oil in the oil tank and the sampling position, and then controlling the reduction motor (2) to send the sampling barrel (7) to the sampling position for sampling.

2. The automatic height measuring device for oil samples as claimed in claim 1, characterized in that: The frame (1) is also provided with a position sensor (8) electrically connected to the controller (5), and the controller (5) is configured to stop the reduction motor (2) from working when the position sensor (8) detects the position of the plumb bob (6) or the sampling bucket (7) during the process of retracting the plumb bob (6) or the sampling bucket (7).

3. The automatic height measuring device for oil samples as claimed in claim 1, characterized in that: The winding wheel (3) is rotatably arranged on the frame (1), and the reduction motor (2) drives the winding wheel (3) to rotate via a synchronous belt (21).

4. The automatic height measuring sampler for oil samples as claimed in claim 1, characterized in that: The hanging rope (31) is a measuring tape.

5. The automatic height measuring device for oil samples as claimed in claim 4, characterized in that: The frame (1) is provided with an oil scraping chuck (11), and the suspension rope (31) passes through the oil scraping chuck (11) after passing around the fixed pulley (4) and is then connected to the plumb bob (6) or the sampling barrel (7).

6. The automatic height measuring device for oil samples as claimed in claim 1, characterized in that: The controller (5) comprises a display screen and a control panel.

7. The automatic height measuring sampler for oil sample according to any one of claims 1 to 6, characterized in that: The top of the frame (1) is provided with a handle (12), and the bottom of the frame (1) is provided with casters (13).

8. The automatic height measuring sampler for oil samples as claimed in claim 7, characterized in that: A storage rack (14) for storing a plumb bob (6) and a sampling bucket (7) is provided on the side of the frame (1).

9. The automatic height measuring sampler for oil samples according to claim 7, characterized in that: A fixing frame (15) which can be sleeved on the oil tank opening (9) is provided at the bottom of the frame (1), and a clamping screw (16) which can press the fixing frame (15) onto the oil tank opening (9) is provided beside the fixing frame (15).

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