Automatic sampling device suitable for oil product detection

Abstract

The utility model discloses an automatic sampling device suitable for oil product detection, which comprises a rack, a hoisting mechanism and a sampling mechanism, the hoisting mechanism is arranged on the rack, the hoisting mechanism drives the sampling mechanism to lift, and the hoisting mechanism comprises a winch arranged on the rack; the sampling mechanism comprises a lifting frame, a rotary driving device, a rotating shaft and a plurality of vertically arranged sampling units; each sampling unit comprises a sampling barrel, a piston, a piston rod, a plug and a pull rope. When the sampling unit is driven by the winch to enter oil, the sampling barrel has no closed cavity and can naturally sink, the oil can naturally flow into the sampling barrel, air cannot be brought into the oil, and the oil quality cannot be affected; the rotary driving device drives the rotating shaft to rotate, and the rotating shaft winds the pull rope to drive the piston to move, so that oil enters the sampling barrel from the oil inlet hole; the oil inlet hole is sealed by the plug, so that oil is stored in a closed space formed by the plug, the sampling barrel and the piston, and automatic sampling is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of oil detection equipment, in particular to an automatic sampling device suitable for oil product detection. Background Technique

[0002] Most crude oils and petrochemical raw materials are stored in fixed storage tanks. Since the oil products are stored statically in the oil tanks for a long time, many physical and chemical properties of the oil products in the oil tanks may change. In order to measure the performance and quality of the substances in the tanks, it is necessary to sample and analyze the oil products in the storage tanks; common sampling methods include spot sampling, combined sampling, etc.

[0003] The patent with the publication number CN213041566U discloses a combined sample sampling device for oil product detection, which includes a counterweight, a box body, a partition board, and a suspension rod. A counterweight is fixedly connected to the bottom of the box body. A hydraulic cavity is fixedly connected to the middle of the inner top wall of the box body. A hydraulic rod is vertically installed in the hydraulic cavity. A connecting rod is fixedly connected to the bottom of the hydraulic rod. A sealing plate is fixedly connected to the left end of the connecting rod. When in use, the sampling device is hoisted into the storage tank through a suspension rope to perform combined sample sampling.

[0004] When the above sampling device samples, the box body will be immersed in the oil liquid. Since the inner cavity of the box body remains closed, there will be air and it has a certain buoyancy. The gravity of the counterweight enables the box body to descend normally in the oil liquid; there are two problems:

[0005] First, when the sealing plate is opened, the oil liquid enters the box body, and the air in the box body is discharged from the box body and enters the oil liquid. The oxygen and moisture in the air may accelerate the oxidation of the oil, resulting in a decrease in the quality of the oil; second, the box body has a certain buoyancy. Although setting a counterweight can offset the buoyancy and enable the box body to descend smoothly in the oil liquid, it will increase the overall weight of the sampling device, making the lifting of the sampling device more laborious and energy-consuming. Summary of the Utility Model

[0006] Based on this, it is necessary to provide an automatic sampling device suitable for oil product detection in view of the above technical problems.

[0007] To achieve the above object, the present utility model provides an automatic sampling device suitable for oil product detection, which includes a frame, a hoisting mechanism, and a sampling mechanism. The hoisting mechanism is installed on the frame, and the hoisting mechanism drives the sampling mechanism to lift and lower. The hoisting mechanism includes a winch installed on the frame; the sampling mechanism includes a lifting frame, a rotation driving device, a rotating shaft, and a plurality of vertically arranged sampling units. The lifting frame is connected to the steel wire rope of the winch. The rotation driving device is fixedly installed on the lifting frame. The rotating shaft is rotatably installed on the lifting frame, and the rotation driving device is in transmission connection with the rotating shaft; the sampling unit includes a sampling cylinder, a piston, a piston rod, a plug, and a pulling rope. One end of the sampling cylinder is a closed end and is provided with an oil inlet hole. The other end of the sampling cylinder is an open structure. The piston is located inside the sampling cylinder and is slidably and sealingly connected to the sampling cylinder. One end of the piston rod is fixedly connected to the piston, and the other end passes through the oil inlet hole and is fixedly connected to a plug that can close the oil inlet hole. The diameter of the piston rod is smaller than the inner diameter of the oil inlet hole. A pulling rope is fixed to the end of the piston facing away from the plug, and the other end of the pulling rope is connected to the rotating shaft; adjacent sampling cylinders are fixedly connected to each other.

[0008] Preferably, the sampling mechanism further includes a first coupling, a second coupling, and a torque sensor. One end of the torque sensor is connected to the first coupling, and the other end of the torque sensor is connected to the second coupling. The end of the first coupling facing away from the torque sensor is connected to the output end of the rotation driving device, and the end of the second coupling facing away from the torque sensor is connected to the rotating shaft.

[0009] Preferably, a winding wheel corresponding to the pulling rope one by one is fixed on the rotating shaft, and the end of the pulling rope away from the piston is wound and installed on the winding wheel.

[0010] Preferably, the hoisting mechanism further includes a first guide wheel assembly and a second guide wheel assembly. The steel wire rope of the winch sequentially bypasses the first guide wheel assembly and the second guide wheel assembly and then is connected to the lifting frame.

[0011] Preferably, the hoisting mechanism further includes a multi-section telescopic rod. The upper end of the multi-section telescopic rod is connected to the frame, and the lower end of the multi-section telescopic rod is connected to the lifting frame.

[0012] Preferably, the piston includes a first plug body part and a second plug body part. The first plug body part is fixedly connected to the second plug body part. The first plug body part is slidably and sealingly connected to the sampling cylinder. When the first plug body part abuts against the inner wall of the closed end of the sampling cylinder, the second plug body part is located inside the oil inlet hole and closes the oil inlet hole.

[0013] Preferably, the plug includes a first blocking part and a second blocking part. The first blocking part is used for abutting and cooperating with the outer wall of the closed end of the sampling cylinder. When the first blocking part abuts against the outer wall of the closed end of the sampling cylinder, the second blocking part is located inside the oil inlet hole and closes the oil inlet hole.

[0014] Preferably, adjacent sampling cylinders are communicated through an oil passage hole. An oil discharge port is provided at the bottom of the lowermost sampling cylinder, and an oil discharge valve is installed on the oil discharge port.

[0015] Compared with the prior art, the technical solution has at least one of the following beneficial effects:

[0016] By paying out the wire rope with a winch, the sampling unit is driven to descend to a preset height position in the oil tank, facilitating sampling; when the sampling unit enters the oil, there is no sealed cavity in the sampling cylinder, and it can sink naturally without being equipped with a heavy block; the oil will flow into the sampling cylinder naturally, without bringing air into the oil and without affecting the quality of the oil product;

[0017] By driving the rotation of the rotating shaft with a rotation driving device, the rotating shaft winds up the pulling rope and then drives the piston to move, so that the oil flows into the sampling cylinder through the oil inlet hole; when the plug abuts against the outer wall of the closed end of the sampling cylinder, the plug closes the oil inlet hole, and the oil is stored in the sealed space formed by the plug, the sampling cylinder and the piston, realizing automatic sampling. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of an automatic sampling device applicable to oil product detection according to an embodiment;

[0019] Figure 2 is a working state diagram of an automatic sampling device applicable to oil product detection according to an embodiment;

[0020] Figure 3 is Figure 1 a partial enlarged view of part A in

[0021] Figure 4 is Figure 2 a cross-sectional view taken along line B-B in

[0022] Figure 5 is Figure 2 a partial enlarged view of part C in

[0023] In the figure, 1, frame; 2, hoisting mechanism; 21, winch; 22, first guide wheel assembly; 23, second guide wheel assembly; 24, multi-section telescopic rod; 3, sampling mechanism; 31, lifting frame; 32, rotation driving device; 33, rotating shaft; 34, sampling unit; 341, sampling cylinder; 3411, oil inlet hole; 3412, oil through hole; 3413, oil discharge port; 342, piston; 3421, first plug body part; 3422, second plug body part; 343, piston rod; 344, plug; 3441, first blocking part; 3442, second blocking part; 345, pulling rope; 35, torque sensor; 36, winding wheel; 37, oil discharge valve. Detailed Embodiments

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0025] See also Figures 1 to 5 The embodiment of the present application provides an automatic sampling device suitable for oil product detection, including a frame 1, a hoisting mechanism 2, and a sampling mechanism 3. The hoisting mechanism 2 is installed on the frame 1, and the hoisting mechanism 2 drives the sampling mechanism 3 to rise and fall. The hoisting mechanism 2 includes a winch 21 installed on the frame 1; the sampling mechanism 3 includes a lifting frame 31, a rotating drive device 32, a rotating shaft 33 and a plurality of vertically arranged sampling units 34. The lifting frame 31 is connected to the wire rope of the winch 21, the rotating drive device 32 is fixedly installed on the lifting frame 31, and the rotating shaft 33 is rotatably installed on the lifting frame 31. The rotating drive device 32 uses a motor equipped with a worm gear reducer, or a motor equipped with a brake self-locking device, and has a self-locking function; the rotating drive device 32 and the rotating shaft 3 3 transmission connection; the sampling unit 34 includes a sampling cylinder 341, a piston 342, a piston rod 343, a plug 344 and a pull rope 345. One end of the sampling cylinder 341 is a closed end and is provided with an oil inlet hole 3411, and the other end of the sampling cylinder 341 is an open structure. The piston 342 is located in the sampling cylinder 341 and is slidably and sealedly connected to the sampling cylinder 341. One end of the piston rod 343 is fixedly connected to the piston 342, and the other end passes through the oil inlet hole 3411 and is fixedly connected to the plug 344 that can close the oil inlet hole 3411. The diameter of the piston rod 343 is smaller than the inner diameter of the oil inlet hole 3411. The end of the piston 342 facing away from the plug 344 is fixed with a pull rope 345, and the other end of the pull rope 345 is connected to the rotating shaft 33; adjacent sampling cylinders 341 are fixedly connected.

[0026] In this embodiment, initially, the piston 342 abuts against the closed end of the sampling tube 341, and there is no sealed cavity in the sampling tube 341; there is a certain friction between the piston 342 and the inner wall of the sampling tube 341, and the piston 342 will not move easily; the wire rope is unwound by the winch 21, driving the lifting frame 31 to descend, so that the sampling unit 34 descends from the top of the oil tank into the oil tank, and the sampling unit 34 is controlled to descend to a preset height position in the oil tank by the length of the unwound wire rope of the winch 21; when the sampling tube 341 descends in the oil liquid in the oil tank, the oil liquid will naturally flow into the sampling tube 341, and air will not be brought into the oil liquid. At the same time, the sampling mechanism 3 will naturally sink in the oil liquid due to the buoyancy generated by the absence of a sealed cavity, and there is no need to be equipped with a weight block;

[0027] The rotating shaft 33 is driven to rotate by the rotation driving device 32. The rotating shaft 33 winds up the pulling rope 345, and the pulling rope 345 drives the piston 342 to move, so that the piston 342 no longer closes the oil inlet hole 3411, and the oil fluid enters the sampling cylinder 341 from the oil inlet hole 3411; when the plug 344 abuts against the outer wall of the closed end of the sampling cylinder 341, the plug 344 closes the oil inlet hole 3411, and the plug 344, the sampling cylinder 341 and the piston 342 form a closed space for storing the oil fluid.

[0028] Finally, the wire rope is wound up by the winch 21, driving the sampling mechanism 3 to rise to the rising oil tank, realizing automatic sampling of the oil product.

[0029] In a preferred embodiment, to facilitate detecting whether the plug 344 abuts against the outer wall of the closed end of the sampling cylinder 341 and closes the oil inlet hole 3411, please refer to Figure 1 and Figure 2 The sampling mechanism 3 is further provided with a first coupling, a second coupling and a torque sensor 35. One end of the torque sensor 35 is connected to the first coupling, and the other end of the torque sensor 35 is connected to the second coupling. The end of the first coupling facing away from the torque sensor 35 is connected to the output end of the rotation driving device 32, and the end of the second coupling facing away from the torque sensor 35 is connected to the rotating shaft 33. The rotation driving device 32 drives the first coupling, the torque sensor 35, the second coupling and the rotating shaft 33 to rotate in sequence. The rotating shaft 33 winds up the pulling rope 345 and further drives the piston 342 to move. When the plug 344 abuts against the outer wall of the closed end of the sampling cylinder 341, the pulling rope 345 cannot continue to pull the piston 342, and the torque sensor 35 detects an increase in the torque for driving the rotating shaft 33 to rotate by the rotation driving device 32. Therefore, it can be judged that the plug 344 has abutted against the outer wall of the closed end of the sampling cylinder 341 and closed the oil inlet hole 3411. The pulling rope 345 can be a rope with certain elasticity, so that a certain pressure is maintained between the plug 344 and the sampling cylinder 341, and the plug 344 stably closes the oil inlet hole 3411.

[0030] In a preferred embodiment, to facilitate the rotating shaft 33 to wind up the pulling rope 345 and facilitate the connection between the pulling rope 345 and the rotating shaft 33, please refer to Figure 1 and Figure 2 The rotating shaft 33 is fixed with winding wheels 36 corresponding to the pulling ropes 345 one by one, and the end of the pulling rope 345 away from the piston 342 is wound and installed on the winding wheel 36. The rotating shaft 33 drives the winding wheel 36 to rotate, and further drives the pulling rope 345 to move.

[0031] In a preferred embodiment, to facilitate the wire rope of the winch 21 to drive the lifting frame 31 to lift and lower, please refer to Figure 1 and Figure 2, the hoisting mechanism 2 is further provided with a first guide wheel assembly 22 and a second guide wheel assembly 23. The steel wire rope of the winch 21 sequentially bypasses the first guide wheel assembly 22 and the second guide wheel assembly 23 and then is connected to the lifting frame 31. The first guide wheel assembly 22 and the second guide wheel assembly 23 play a guiding role for the steel wire rope.

[0032] In a preferred embodiment, to prevent the lifting frame 31 from rotating and swinging during lifting and sampling, please refer to Figure 1 and Figure 2 , the hoisting mechanism 2 is further provided with a multi-section telescopic rod 24. The upper end of the multi-section telescopic rod 24 is connected to the frame 1, and the lower end of the multi-section telescopic rod 24 is connected to the lifting frame 31. The multi-section telescopic rod 24 has a multi-section telescopic function and can be telescoped with the lifting and lowering of the lifting frame 31, playing a guiding role for the lifting frame 31 to prevent rotation and swinging and ensuring the smooth progress of the sampling work.

[0033] In a preferred embodiment, to prevent impurities from entering the oil inlet hole 3411 before sampling and to prevent the oil in the oil inlet hole 3411 from being stored during the downward movement of the sampling mechanism 3 and then entering the sampling cylinder 341 when it descends to the preset position, please refer to Figures 3 to 5 , the piston 342 is provided with a first plug body part 3421 and a second plug body part 3422. The first plug body part 3421 is fixedly connected to the second plug body part 3422. The first plug body part 3421 is slidably and sealingly connected to the sampling cylinder 341. When the first plug body part 3421 abuts against the inner wall of the closed end of the sampling cylinder 341, the second plug body part 3422 is located in the oil inlet hole 3411 and closes the oil inlet hole 3411. A chamfer is provided at one end of the second plug body part 3422 facing the piston rod 343, which is convenient for inserting into the oil inlet hole 3411.

[0034] In a preferred embodiment, to improve the sealing effect of the plug 344 on the oil inlet hole 3411, please refer to Figures 3 to 5 , the plug 344 is provided with a first blocking part 3441 and a second blocking part 3442. The first blocking part 3441 is used for abutting and cooperating with the outer wall of the closed end of the sampling cylinder 341. When the first blocking part 3441 abuts against the outer wall of the closed end of the sampling cylinder 341, the second blocking part 3442 is located in the oil inlet hole 3411 and closes the oil inlet hole 3411. The first blocking part 3441 and the second blocking part 3442 are integrally and fixedly connected. The first blocking part 3441 and the second blocking part 3442 are made of elastic rubber material. The second blocking part 3442 is adapted to the oil inlet hole 3411 and can be inserted into the oil inlet hole 3411 with an interference fit to close the oil inlet hole 3411. A chamfer is provided at one end of the second blocking part 3442 facing the piston rod 343, which is convenient for inserting into the oil inlet hole 3411.

[0035] In a preferred embodiment, to facilitate the removal of the sampled oil in the sampling cylinder 341, please refer to Figures 3 to 5, it is set that adjacent sampling cylinders 341 are communicated through oil passing holes 3412, and an oil drain port 3413 is provided at the bottom of the lowermost sampling cylinder 341. An oil drain valve 37 is installed on the oil drain port 3413. By opening the oil drain valve 37, the oil in the lowermost sampling cylinder 341 can be discharged from the oil drain port 3413, and the oil in the remaining sampling cylinders 341 flows downward through the oil passing holes 3412 and will ultimately be discharged from the oil drain port 3413.

[0036] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0037] The above embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. An automatic sampling device applicable to oil product detection, comprising a frame (1), a hoisting mechanism (2), and a sampling mechanism (3). The hoisting mechanism (2) is installed on the frame (1), and the hoisting mechanism (2) drives the sampling mechanism (3) to lift and lower. It is characterized in that, The hoisting mechanism (2) includes a winch (21) installed on the frame (1); the sampling mechanism (3) includes a lifting frame (31), a rotary drive device (32), a rotating shaft (33), and a plurality of vertically arranged sampling units (34). The lifting frame (31) is connected to the steel wire rope of the winch (21). The rotary drive device (32) is fixedly installed on the lifting frame (31). The rotating shaft (33) is rotatably installed on the lifting frame (31). The rotary drive device (32) is in transmission connection with the rotating shaft (33). The sampling unit (34) includes a sampling cylinder (341), a piston (342), a piston rod (343), a plug (344), and a pulling rope (345). One end of the sampling cylinder (341) is a closed end and is provided with an oil inlet hole (3411). The other end of the sampling cylinder (341) is of an open structure. The piston (342) is located inside the sampling cylinder (341) and is in sliding seal connection with the sampling cylinder (341). One end of the piston rod (343) is fixedly connected to the piston (342), and the other end passes through the oil inlet hole (3411) and is fixedly connected to the plug (344) capable of closing the oil inlet hole (3411). The diameter of the piston rod (343) is smaller than the inner diameter of the oil inlet hole (3411). A pulling rope (345) is fixed to the end of the piston (342) facing away from the plug (344). The other end of the pulling rope (345) is connected to the rotating shaft (33). The adjacent sampling cylinders (341) are fixedly connected.

2. The automatic sampling device applicable to oil product detection according to claim 1, wherein The sampling mechanism (3) further includes a first coupling, a second coupling, and a torque sensor (35). One end of the torque sensor (35) is connected to the first coupling. The other end of the torque sensor (35) is connected to the second coupling. The end of the first coupling facing away from the torque sensor (35) is connected to the output end of the rotary drive device (32). The end of the second coupling facing away from the torque sensor (35) is connected to the rotating shaft (33).

3. The automatic sampling device applicable to oil product detection according to claim 1, characterized in that, A winding wheel (36) corresponding to the pulling rope (345) one by one is fixed on the rotating shaft (33). The end of the pulling rope (345) away from the piston (342) is wound and installed on the winding wheel (36).

4. The automatic sampling device applicable to oil product detection according to claim 1, characterized in that, The hoisting mechanism (2) further includes a first guide wheel assembly (22) and a second guide wheel assembly (23). The steel wire rope of the winch (21) sequentially passes around the first guide wheel assembly (22) and the second guide wheel assembly (23) and then is connected to the lifting frame (31).

5. The automatic sampling device applicable to oil product detection according to claim 1, characterized in that, The hoisting mechanism (2) further includes a multi-section telescopic rod (24). The upper end of the multi-section telescopic rod (24) is connected to the frame (1). The lower end of the multi-section telescopic rod (24) is connected to the lifting frame (31).

6. The automatic sampling device applicable to oil product detection according to claim 1, wherein, The piston (342) includes a first piston body part (3421) and a second piston body part (3422). The first piston body part (3421) is fixedly connected to the second piston body part (3422). The first piston body part (3421) is in sliding seal connection with the sampling cylinder (341). When the first piston body part (3421) abuts against the inner wall of the closed end of the sampling cylinder (341), the second piston body part (3422) is located inside the oil inlet hole (3411) and closes the oil inlet hole (3411).

7. The automatic sampling device applicable to oil product detection according to claim 1, characterized in that, The plug (344) includes a first blocking portion (3441) and a second blocking portion (3442). The first blocking portion (3441) is used for abutting and cooperating with the outer wall of the closed end of the sampling cylinder (341). When the first blocking portion (3441) abuts against the outer wall of the closed end of the sampling cylinder (341), the second blocking portion (3442) is located in the oil inlet hole (3411) and closes the oil inlet hole (3411).

8. The automatic sampling device applicable to oil product detection according to claim 1, wherein Adjacent sampling cylinders (341) are communicated through an oil through hole (3412). An oil drain port (3413) is provided at the bottom of the lowermost sampling cylinder (341), and an oil drain valve (37) is installed on the oil drain port (3413).

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