Oil unloading sampler and sampling method

Abstract

The present invention relates to the technical field of sampling equipment, and in particular to an oil unloading sampler and a sampling method. An oil unloading sampler is used to be installed at an oil outlet pipe, and comprises an outer cylinder and a sealing mechanism. The sealing mechanism comprises a first ring block, a second ring block and an adjusting assembly. A first sealing gasket is arranged on the first ring block, and a second sealing gasket is arranged on the second ring block. The end face of the oil outlet pipe first contacts the second sealing gasket, and presses the second ring block to move in a direction away from the oil outlet pipe, and the second ring block drives the first ring block to move in a direction close to the oil outlet pipe through the adjusting assembly. By setting the first sealing gasket and the second sealing gasket, it can adapt to oil outlet pipes of different diameters, and the first sealing gasket and the second sealing gasket formed a double-layer seal, and the sealing effect is better. The present invention provides an oil unloading sampler and a sampling method to solve the problem that the existing oil unloading sampler cannot adapt to the oil unloading ports of tank trucks of different diameters, and the sealing effect is not good.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment, and in particular to an oil unloading sampler and a sampling method. Background Art

[0002] A sampler is a device or tool used to obtain samples of a substance. It is widely used in many fields such as scientific research, industrial production, and quality control. The function of a sampler is to retrieve representative samples from one or more locations. These samples are used to analyze the composition, characteristics, or conditions of the material to ensure product quality or process control. Depending on the application requirements and environment, there are many types of samplers, from simple handheld devices to complex automated systems, each with its own specific design and function.

[0003] The oil unloading sampler is a device specially used for automatically extracting representative oil samples from the oil unloading dock or pipeline. The oil unloading sampler is mainly used for automatic sampling of crude oil or other liquid petrochemical products. In the oil industry, in order to ensure the quality of the oil products transported or sold, it is necessary to regularly extract samples from the pipeline for testing. The traditional manual sampling method is not only labor-intensive, but also may have safety hazards. Therefore, the automatic sampler has become an important part of the modern oil pipeline system. This equipment usually consists of main parts such as quick connectors, volume tanks, exhaust valves and sampling valves. The quick connector can be quickly connected to the oil outlet pipe of the tank truck. The volume tank is used to measure the amount of sample flowing out. The exhaust valve facilitates the discharge of air when the oil enters the sampler. A hose is set at the sampling valve, and the oil is discharged into the measuring cylinder through the hose. The oil is taken out and then tested.

[0004] For example, the patent with announcement number CN221173984U provides a full-range special sampler for oil tanker unloading. By setting a plugging cover, the front-end sample collected in the main pipe when the tanker tank is unloading can be discharged to the sample storage area through the second drain valve, so that sampling can be collected and it is convenient for the user to insert the collection tube into other locations in the tanker for sampling. However, the adaptability of the sampling device is poor and cannot adapt to oil unloading ports of different diameters. Summary of the invention

[0005] The invention provides an oil unloading sampler and a sampling method to solve the problems that the existing oil unloading sampler cannot be adapted to the oil unloading ports of tank trucks with different diameters and has a poor sealing effect.

[0006] The oil unloading sampler and sampling method of the present invention adopt the following technical scheme: an oil unloading sampler is used to be installed at the oil outlet pipe, comprising an outer tube, a sealing mechanism and a locking mechanism. The outer tube comprises a connecting pipe, the connecting pipe is used to be installed at the oil outlet pipe, an annular retaining ring is fixedly arranged in the connecting pipe, the annular retaining ring and the connecting pipe are coaxially arranged, a first annular groove and a second annular groove are formed on the annular retaining ring, the first annular groove, the second annular groove and the annular retaining ring are concentrically arranged, and the first annular groove is located outside the second annular groove.

[0007] The sealing mechanism includes a first ring block, a second ring block and an adjustment assembly. Along the axial direction of the connecting pipe, the two sides of the first ring block are the first side and the second side, the second side of the first ring block is inside the first ring groove, the first side of the first ring block is fixedly provided with a first sealing gasket, the two sides of the second ring block are the third side and the fourth side, the fourth side of the second ring block is inside the second ring groove, the third side of the second ring block is fixedly provided with a second sealing gasket, and the first sealing gasket and the second sealing gasket are used to abut against the end face of the oil outlet pipe. Both the first ring block and the second ring block can move along the axial direction of the connecting pipe. In the initial state, the first ring block and the second ring block are offset along the axial direction of the connecting pipe.

[0008] The adjusting assembly is arranged in the connecting pipe, and the adjusting assembly enables the first ring block and the second ring block to move in opposite directions. The locking mechanism is arranged on the connecting pipe, and the locking mechanism is used to connect the connecting pipe and the oil outlet pipe.

[0009] Further, a first rack is provided on the inner side wall of the first ring block, and the first rack is provided along the axial direction of the connecting tube. A second rack is provided on the outer side wall of the second ring block, and the second rack is provided along the axial direction of the connecting tube. The adjustment assembly includes a gear, which is provided on the annular retaining ring, and the axial direction of the gear is provided along the tangential direction of the annular retaining ring. The gear can rotate around its own axis, and the gear is meshed with the first rack and the second rack.

[0010] Further, the annular retaining ring includes a first retaining ring, and the first retaining ring is located between the first ring groove and the second ring groove. A first mounting groove is provided on the first retaining ring, and the first mounting groove communicates with the first ring groove and the second ring groove, and a first limiting groove is provided on both side walls of the first mounting groove along the circumference of the first retaining ring. A matching shaft is fixedly provided on the gear, and the matching shaft is provided along the tangent direction of the annular retaining ring, and both ends of the matching shaft are rotatably provided in the two first limiting grooves.

[0011] Further, one side of the first sealing gasket is fixedly connected to the first ring block, and the other side of the first sealing gasket includes a first plane and a first inclined surface, and the first plane is located on the inner side of the first inclined surface. The thickness of the first sealing gasket gradually increases along the direction from the inner side wall to the outer side wall of the first ring block. One side of the second sealing gasket is fixedly connected to the second ring block, and the other side of the second sealing gasket includes a second plane and a second inclined surface, and the second plane is located on the outer side of the second inclined surface. The thickness of the second sealing gasket gradually increases along the direction from the inner side wall to the outer side wall of the second ring block.

[0012] Furthermore, the sealing mechanism also includes a first spring and a second spring, the first spring is arranged in the first annular groove, the first spring connects the first annular groove and the second side of the first ring block, and the second spring is arranged in the second annular groove, the second spring connects the second annular groove and the fourth side of the second ring block.

[0013] Furthermore, the sealing mechanism also includes a third sealing gasket and a fourth sealing gasket, wherein the third sealing gasket is fixedly arranged on the inner side wall of the first ring block, and the third sealing gasket abuts against the inner wall of the first ring groove. The fourth sealing gasket is fixedly arranged on the outer side wall of the second ring block, and the fourth sealing gasket abuts against the inner wall of the second ring groove.

[0014] Furthermore, a plurality of second mounting grooves are provided on the peripheral wall of the connecting tube, and the plurality of second mounting grooves are sequentially distributed along the circumference of the connecting tube. The locking mechanism includes a plurality of locking assemblies, and the plurality of locking assemblies are sequentially distributed along the circumference of the connecting tube. Each locking assembly includes a cam, a rotating shaft, a connecting rod and two limit plates. The two limit plates are fixedly arranged on the outer peripheral wall of the connecting tube, the rotating shaft is arranged along the tangential direction of the connecting tube, and the two ends of the rotating shaft are rotatably arranged on the two limit plates respectively. The cam is fixedly connected to the rotating shaft, the cam is rotatably arranged in the second limit groove, and the connecting rod is fixedly connected to the cam.

[0015] Furthermore, the two ends of the connecting pipe are respectively a first end and a second end, and the first end of the connecting pipe is connected to the oil outlet pipe. The outer tube also includes a connecting tube, the connecting tube is connected to the second end of the connecting pipe, and the connecting tube and the connecting pipe are in communication. An oil outlet is provided on the side wall of the connecting tube, and a valve is provided at the oil outlet.

[0016] Furthermore, an observation mechanism is also provided on the side wall of the connecting tube, and the observation mechanism includes a glass tube and a sleeve, wherein the glass tube is fixedly provided on the connecting tube and the glass tube and the connecting tube are connected. The sleeve is fixedly provided on the connecting tube and the sleeve is provided on the outside of the glass tube, and a plurality of observation holes are opened on the sleeve.

[0017] A sampling method, using the above-mentioned oil unloading sampler, comprises the following steps:

[0018] S1: In the initial state, the first ring block and the second ring block are arranged in a staggered manner, the outer cylinder is picked up and aligned with the oil outlet pipe for connection, and the connecting pipe is sleeved on the oil outlet pipe.

[0019] S2: The end face of the oil outlet pipe first contacts the second sealing gasket, and presses the second ring block to move away from the oil outlet pipe, and the second ring block drives the first ring block to move toward the oil outlet pipe through the adjustment component. Or the end face of the oil outlet pipe first contacts the first sealing gasket, and presses the first ring block to move away from the oil outlet pipe, and the first ring block drives the second ring block to move toward the oil outlet pipe through the adjustment component.

[0020] S3: Then, the connecting pipe and the oil outlet pipe are connected through the locking mechanism.

[0021] S4: Finally, open the oil outlet pipe to take out the oil.

[0022] The beneficial effects of the present invention are as follows: an oil unloading sampler of the present invention, through the first ring block and the second ring block, in the initial state, the first ring block and the second ring block are staggered, and when the first ring block is farther away from the oil outlet pipe relative to the second ring block, the outer tube is first picked up and aligned with the oil outlet pipe for connection, and in the process of connecting the oil outlet pipe and the connecting pipe, the end face of the oil outlet pipe first contacts the second sealing gasket, and presses the second ring block to move in the direction away from the oil outlet pipe, the movement of the second ring block drives the gear to rotate, and the gear drives the first ring block to move in the direction close to the oil outlet pipe. The second sealing gasket and the first sealing gasket contact the oil outlet pipe successively, and after the second sealing gasket and the oil outlet pipe are tightly pressed, the first sealing gasket is pressed against the oil outlet pipe again, thereby ensuring the sealing effect.

[0023] By setting the first sealing gasket and the second sealing gasket, it can adapt to oil outlet pipes of different diameters, and has a wider range of applications. Secondly, the first sealing gasket and the second sealing gasket are set to form a double-layer seal, and the sealing effect is better. Finally, the second sealing gasket is firstly against the oil outlet pipe, and the first sealing gasket is then against the oil outlet pipe, which can ensure that the first sealing gasket and the second sealing gasket are both tightly against the oil outlet pipe, and the sealing effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 A schematic diagram of the structure of an oil unloading sampler provided by an embodiment of the present invention;

[0026] Figure 2 A front view of an oil unloading sampler provided by an embodiment of the present invention;

[0027] Figure 3for Figure 2 Sectional view at AA in the middle;

[0028] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0029] Figure 5 A partial structural schematic diagram of an oil unloading sampler provided in an embodiment of the present invention.

[0030] In the figure: 100, outer tube; 101, connecting tube; 102, connecting tube; 104, annular retaining ring; 105, first annular groove; 106, second annular groove; 107, second mounting groove; 110, first ring block; 111, first inclined surface; 112, first rack; 113, first sealing gasket; 114, first spring; 115, third sealing gasket; 116, first plane; 120, second ring block; 121, second inclined surface; 122, second rack; 123, second sealing gasket; 124, second spring; 125, fourth sealing gasket; 126, second plane; 130, gear; 131, matching shaft; 140, cam; 141, connecting rod; 142, limit plate; 150, valve; 160, sleeve; 161, glass tube; 162, observation hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Reference Figures 1 to 5 As shown, an oil unloading sampler provided by an embodiment of the present invention is used to be installed at an oil outlet pipe, and includes an outer tube 100, a sealing mechanism, and a locking mechanism. The outer tube 100 includes a connecting tube 101, and the connecting tube 101 is used to be installed at an oil outlet pipe. An annular retaining ring 104 is fixedly arranged in the connecting tube 101, and the annular retaining ring 104 and the connecting tube 101 are coaxially arranged. The annular retaining ring 104 is provided with a first annular groove 105 and a second annular groove 106, and the first annular groove 105, the second annular groove 106 and the annular retaining ring 104 are concentrically arranged, and the first annular groove 105 is located outside the second annular groove 106.

[0033] The sealing mechanism includes a first ring block 110, a second ring block 120 and an adjustment assembly. Along the axial direction of the connecting pipe 101, the two sides of the first ring block 110 are the first side and the second side, the second side of the first ring block 110 is located inside the first ring groove 105, the first side of the first ring block 110 is fixedly provided with a first sealing gasket 113, the two sides of the second ring block 120 are the third side and the fourth side, the fourth side of the second ring block 120 is located inside the second ring groove 106, the third side of the second ring block 120 is fixedly provided with a second sealing gasket 123, and the first sealing gasket 113 and the second sealing gasket 123 are used to abut against the end face of the oil outlet pipe. Both the first ring block 110 and the second ring block 120 can move along the axial direction of the connecting pipe 101. In the initial state, the first ring block 110 and the second ring block 120 are staggered along the axial direction of the connecting pipe 101.

[0034] The adjusting assembly is disposed in the connecting pipe 101, and the adjusting assembly enables the first ring block 110 and the second ring block 120 to move in opposite directions. The locking mechanism is disposed on the connecting pipe 101, and the locking mechanism is used to connect the connecting pipe 101 and the oil outlet pipe.

[0035] The first ring block 110 and the second ring block 120 are staggered, and when the first ring block 110 is farther away from the oil outlet pipe than the second ring block 120, the outer cylinder 100 is first lifted and aligned with the oil outlet pipe for connection. In the process of connecting the oil outlet pipe and the connecting pipe 101, the end face of the oil outlet pipe first contacts the second sealing gasket 123, and presses the second ring block 120 to move away from the oil outlet pipe. The movement of the second ring block 120 drives the gear 130 to rotate, and the gear 130 drives the first ring block 110 to move toward the direction close to the oil outlet pipe. The second sealing gasket 123 and the first sealing gasket 113 contact the oil outlet pipe successively. After the second sealing gasket 123 is pressed against the oil outlet pipe, the first sealing gasket 113 is pressed against the oil outlet pipe again, thereby ensuring the sealing effect.

[0036] By setting the first sealing gasket 113 and the second sealing gasket 123, it can adapt to oil outlet pipes of different diameters, and the application range is wider. Secondly, the first sealing gasket 113 and the second sealing gasket 123 are set to form a double-layer seal, and the sealing effect is better. Finally, the second sealing gasket 123 is firstly against the oil outlet pipe, and the first sealing gasket 113 is then against the oil outlet pipe, which can ensure that the first sealing gasket 113 and the second sealing gasket 123 are both tightly against the oil outlet pipe, and the sealing effect is better.

[0037] In this embodiment, a first rack 112 is provided on the inner side wall of the first ring block 110, and the first rack 112 is provided along the axial direction of the connecting tube 101. A second rack 122 is provided on the outer side wall of the second ring block 120, and the second rack 122 is provided along the axial direction of the connecting tube 101. The adjustment assembly includes a gear 130, which is provided on the annular retaining ring 104, and the axial direction of the gear 130 is provided along the tangential direction of the annular retaining ring 104. The gear 130 can rotate around its own axis, and the gear 130 is meshed with the first rack 112 and the second rack 122.

[0038] The first ring block 110 and the second ring block 120 are staggered. When the first ring block 110 moves relative to the second ring block 120 , the first ring block 110 drives the gear 130 to rotate. When the gear 130 rotates, it drives the second ring block 120 to move in the opposite direction of the first ring block 110 .

[0039] In this embodiment, the annular retaining ring 104 includes a first retaining ring, and the first retaining ring is located between the first annular groove 105 and the second annular groove 106. A first mounting groove is provided on the first retaining ring, and the first mounting groove communicates with the first annular groove 105 and the second annular groove 106. A first limiting groove is provided on both side walls of the first mounting groove along the circumference of the first retaining ring. A matching shaft 131 is fixedly provided on the gear 130, and the matching shaft 131 and the gear 130 are coaxially arranged. The matching shaft 131 is arranged along the tangential direction of the annular retaining ring 104, and the two ends of the matching shaft 131 are rotatably arranged in the two first limiting grooves.

[0040] In this embodiment, one side of the first sealing gasket 113 is fixedly connected to the first ring block 110, and the other side of the first sealing gasket 113 includes a first plane 116 and a first inclined surface 111, and the first plane 116 is located on the inner side of the first inclined surface 111. The thickness of the first sealing gasket 113 gradually increases along the direction from the inner side wall to the outer side wall of the first ring block 110. One side of the second sealing gasket 123 is fixedly connected to the second ring block 120, and the other side of the second sealing gasket 123 includes a second plane 126 and a second inclined surface 121, and the second plane 126 is located on the outer side of the second inclined surface 121. The thickness of the second sealing gasket 123 gradually increases along the direction from the inner side wall to the outer side wall of the second ring block 120.

[0041] When the small-diameter oil outlet pipe is pressed, the end face of the oil outlet pipe contacts the second plane 126 on the second ring block 120 and the first inclined surface 111 on the first ring block 110. When the large-diameter oil outlet pipe is pressed, the end face of the oil outlet pipe contacts the second inclined surface 121 on the second ring block 120 and the first plane 116 on the first ring block 110. Specifically, when the oil outlet pipe contacts the first inclined surface 111 or the second inclined surface 121, it is initially in point contact. When connected to oil outlet pipes of different diameters, the positions of the point contact between the oil outlet pipe and the first inclined surface 111 or the second inclined surface 121 are different. When the same force is used to squeeze so that the first inclined surface 111 or the second inclined surface 121 and the oil outlet pipes of different diameters are offset, the deformation distance of the first inclined surface 111 or the second inclined surface 121 is nearly the same, and the contact surfaces of the oil outlet pipes of different diameters and the first inclined surface 111 or the second inclined surface 121 are consistent. That is, when connecting oil outlet pipes of different diameters, the same positive pressure can be used, which is more labor-saving.

[0042] In this embodiment, the sealing mechanism further includes a first spring 114 and a second spring 124. There are multiple first springs 114 and multiple second springs 124, and the multiple first springs 114 and multiple second springs 124 are sequentially distributed along the circumference of the connecting pipe 101. The first spring 114 is arranged in the first annular groove 105, and the first spring 114 connects the first annular groove 105 and the second side of the first ring block 110. The second spring 124 is arranged in the second annular groove 106, and the second spring 124 connects the second annular groove 106 and the fourth side of the second ring block 120. The first spring 114 and the second spring 124 are used to make the first ring block 110 and the second ring block 120 further press against the oil outlet pipe.

[0043] In this embodiment, the sealing mechanism further includes a third sealing gasket 115 and a fourth sealing gasket 125. The third sealing gasket 115 is fixedly disposed on the inner side wall of the first ring block 110, and the third sealing gasket 115 abuts against the inner wall of the first annular groove 105. The fourth sealing gasket 125 is fixedly disposed on the outer side wall of the second ring block 120, and the fourth sealing gasket 125 abuts against the inner wall of the second annular groove 106. The third sealing gasket 115 prevents oil from entering the first annular groove 105, and the fourth sealing gasket 125 prevents oil from entering the second annular groove 106.

[0044] In this embodiment, a plurality of second mounting grooves 107 are provided on the peripheral wall of the connecting tube 101, and the plurality of second mounting grooves 107 are sequentially distributed along the circumference of the connecting tube 101, and the second mounting grooves 107 are arranged along the tangential direction of the connecting tube 101. The locking mechanism includes a plurality of locking assemblies, and the plurality of locking assemblies are sequentially distributed along the circumference of the connecting tube 101. Each locking assembly includes a cam 140, a rotating shaft, a connecting rod 141 and two limiting plates 142. The two limiting plates 142 are fixedly arranged on the peripheral wall of the connecting tube 101, and the two limiting plates 142 are located on both sides of a second mounting groove 107, and a second limiting groove is provided on each first limiting plate 142. The rotating shaft is arranged along the tangential direction of the connecting tube 101, and the two ends of the rotating shaft are rotatably arranged in the two second limiting grooves respectively. The cam 140 is fixedly connected to the rotating shaft, a torsion spring is provided at the connection between the cam 140 and the rotating shaft, the cam 140 is rotatably disposed in the second limiting groove, and the connecting rod 141 is fixedly connected to the cam 140 .

[0045] The connecting rod 141 is rotated so that the cam 140 is located outside the connecting pipe 101, which facilitates the connection between the connecting pipe 101 and the oil outlet pipe. When the first sealing gasket 113 and the second sealing gasket 123 are pressed against the oil outlet pipe at the same time, the connecting rod 141 is rotated again to rotate the cam 140 to the inside of the connecting pipe 101. After the cam 140 and the oil outlet pipe are in contact, the oil outlet pipe and the connecting pipe 101 are connected. Under the action of the torsion spring, the cam 140 and the oil outlet pipe are pressed tightly, and the oil outlet pipe and the connecting pipe 101 are ensured to be coaxially arranged.

[0046] In this embodiment, the two ends of the connecting tube 101 are respectively a first end and a second end, and the first end of the connecting tube 101 is connected to the oil outlet pipe. The outer cylinder 100 also includes a connecting cylinder 102, which is connected to the second end of the connecting tube 101, and the connecting cylinder 102 and the connecting tube 101 are in communication. An oil outlet is provided on the side wall of the connecting cylinder 102, and a valve 150 is provided at the oil outlet, and a hose is connected to the valve 150. When the valve 150 is opened, the oil in the outer cylinder 100 enters the measuring cylinder through the hose for storage.

[0047] In this embodiment, an observation mechanism is also provided on the side wall of the connecting tube 102, and the observation mechanism includes a glass tube 161 and a sleeve 160. The glass tube 161 is fixedly provided on the connecting tube 101, and the glass tube 161 is communicated with the connecting tube 101. The sleeve 160 is fixedly provided on the connecting tube 101, and the sleeve 160 is provided on the outside of the glass tube 161. The sleeve 160 is provided with a plurality of observation holes 162, and the oil condition can be observed through the glass tube 161.

[0048] A sampling method, using the above-mentioned oil unloading sampler, comprises the following steps:

[0049] S1: In the initial state, the valve 150 is closed, the first ring block 110 and the second ring block 120 are staggered, and the first ring block 110 is closer to the connecting tube 102 than the second ring block 120. Turn the connecting rod 141 so that the cam 140 is outside the connecting tube 101. Pick up the outer tube 100 and align it with the oil outlet pipe, put the connecting pipe 101 on the oil outlet pipe, and then put one end of the hose into the measuring cylinder.

[0050] S2: In the process of connecting the oil outlet pipe and the connecting pipe 101, the end face of the oil outlet pipe first contacts the second sealing gasket 123, and presses the second ring block 120 to move in the direction close to the connecting tube 102. The movement of the second ring block 120 drives the gear 130 to rotate, and the gear 130 drives the first ring block 110 to move in the direction close to the oil outlet pipe. The second sealing gasket 123 and the first sealing gasket 113 contact the oil outlet pipe successively. After the second sealing gasket 123 and the oil outlet pipe are tightly pressed, the first sealing gasket 113 and the oil outlet pipe are pressed tightly, thereby ensuring the sealing effect.

[0051] When the oil outlet pipe with a small bore is pressed, the end face of the oil outlet pipe contacts the second plane 126 on the second ring block 120 and the first inclined surface 111 on the first ring block 110. When the oil outlet pipe with a large bore is pressed, the end face of the oil outlet pipe contacts the second inclined surface 121 on the second ring block 120 and the first plane 116 on the first ring block 110.

[0052] First, the first ring block 110 and the second ring block 120 can adapt to oil outlet pipes of different diameters. Secondly, the first sealing gasket 113 and the second sealing gasket 123 form a double-layer seal, which has a better sealing effect. Finally, the first inclined surface 111 and the second inclined surface 121 can ensure that when the pressure of the first sealing gasket 113 and the second sealing gasket 123 is sufficient, the positive pressure pressing the outer cylinder 100 is smaller than that of the first sealing gasket 113 and the second sealing gasket 123 without the inclined surface.

[0053] Specifically, when the oil outlet pipe contacts the first inclined surface 111 or the second inclined surface 121, it is initially in point contact. When connecting with oil outlet pipes of different diameters, the positions of the point contact between the oil outlet pipe and the first inclined surface 111 or the second inclined surface 121 are different. When the same force is used to squeeze the first inclined surface 111 or the second inclined surface 121 and the oil outlet pipes of different diameters, the deformation distance of the first inclined surface 111 or the second inclined surface 121 is almost the same, and the contact surfaces of the oil outlet pipes of different diameters and the first inclined surface 111 or the second inclined surface 121 are consistent. That is, when connecting oil outlet pipes of different diameters, the same positive pressure can be used, which is more labor-saving.

[0054] S3: When the first sealing gasket 113 and the second sealing gasket 123 are against the oil outlet pipe at the same time, the connecting rod 141 is rotated to rotate the cam 140 to the inside of the connecting pipe 101. After the cam 140 contacts the oil outlet pipe, the oil outlet pipe and the connecting pipe 101 are connected.

[0055] S4: Then, open the switch of the oil outlet pipe to let oil flow into the outer cylinder 100, and then observe the oil from the observation hole 162, and finally open the valve 150, so that the oil in the outer cylinder 100 flows into the measuring cylinder through the hose. After the sampling is completed, close the switch and valve 150, and then remove the outer cylinder 100.

Claims

1. An oil unloading sampler, used for installation at an oil outlet pipe, characterized in that: It comprises an outer tube, a sealing mechanism and a locking mechanism; the outer tube comprises a connecting pipe, the connecting pipe is used to be installed at the oil outlet pipe, an annular retaining ring is fixedly arranged in the connecting pipe, the annular retaining ring and the connecting pipe are coaxially arranged, a first annular groove and a second annular groove are formed on the annular retaining ring, the first annular groove, the second annular groove and the annular retaining ring are concentrically arranged, and the first annular groove is located outside the second annular groove; The sealing mechanism comprises a first ring block, a second ring block and an adjusting assembly. Along the axial direction of the connecting pipe, two sides of the first ring block are a first side and a second side, the second side of the first ring block is inside the first ring groove, a first sealing gasket is fixedly arranged on the first side of the first ring block, two sides of the second ring block are a third side and a fourth side, the fourth side of the second ring block is inside the second ring groove, a second sealing gasket is fixedly arranged on the third side of the second ring block, and the first sealing gasket and the second sealing gasket are used to abut against the end face of the oil outlet pipe; both the first ring block and the second ring block can move along the axial direction of the connecting pipe; in the initial state, the first ring block and the second ring block are staggered along the axial direction of the connecting pipe; The adjusting assembly is arranged in the connecting pipe, and the adjusting assembly enables the first ring block and the second ring block to move in opposite directions; the locking mechanism is arranged on the connecting pipe, and the locking mechanism is used to connect the connecting pipe and the oil outlet pipe.

2. The oil unloading sampler according to claim 1, characterized in that: A first rack is arranged on the inner wall of the first ring block, and the first rack is arranged along the axial direction of the connecting tube; a second rack is arranged on the outer wall of the second ring block, and the second rack is arranged along the axial direction of the connecting tube; the adjustment assembly includes a gear, the gear is arranged on the annular retaining ring, the axial direction of the gear is arranged along the tangential direction of the annular retaining ring, the gear can rotate around its own axis, and the gear is meshed with the first rack and the second rack.

3. The oil unloading sampler according to claim 2, characterized in that: The annular retaining ring includes a first retaining ring, which is located between the first annular groove and the second annular groove; a first mounting groove is provided on the first retaining ring, the first mounting groove connects the first annular groove and the second annular groove, and a first limiting groove is provided on both side walls of the first mounting groove along the circumference of the first retaining ring; a mating shaft is fixedly arranged on the gear, the mating shaft is arranged along the tangent direction of the annular retaining ring, and both ends of the mating shaft are rotatably arranged in the two first limiting grooves.

4. The oil unloading sampler according to claim 1, characterized in that: One side of the first sealing gasket is fixedly connected to the first ring block, and the other side of the first sealing gasket includes a first plane and a first inclined surface, and the first plane is located on the inner side of the first inclined surface; along the direction from the inner side wall to the outer side wall of the first ring block, the thickness of the first sealing gasket gradually increases; One side of the second sealing gasket is fixedly connected to the second ring block, and the other side of the second sealing gasket includes a second plane and a second inclined surface, and the second plane is located outside the second inclined surface; along the direction from the inner wall to the outer wall of the second ring block, the thickness of the second sealing gasket gradually increases.

5. The oil unloading sampler according to claim 1, characterized in that: The sealing mechanism also includes a first spring and a second spring. The first spring is arranged in the first annular groove and connects the first annular groove and the second side of the first ring block. The second spring is arranged in the second annular groove and connects the second annular groove and the fourth side of the second ring block.

6. The oil unloading sampler according to claim 1, characterized in that: The sealing mechanism also includes a third sealing gasket and a fourth sealing gasket. The third sealing gasket is fixedly arranged on the inner wall of the first ring block, and the third sealing gasket abuts against the inner wall of the first ring groove; the fourth sealing gasket is fixedly arranged on the outer wall of the second ring block, and the fourth sealing gasket abuts against the inner wall of the second ring groove.

7. The oil unloading sampler according to claim 1, characterized in that: A plurality of second mounting grooves are provided on the peripheral wall of the connecting tube, and the plurality of second mounting grooves are sequentially distributed along the circumference of the connecting tube; the locking mechanism comprises a plurality of locking assemblies, and the plurality of locking assemblies are sequentially distributed along the circumference of the connecting tube; each locking assembly comprises a cam, a rotating shaft, a connecting rod and two limit plates; the two limit plates are fixedly arranged on the outer peripheral wall of the connecting tube, the rotating shaft is arranged along the tangential direction of the connecting tube, and the two ends of the rotating shaft are rotatably arranged on the two limit plates respectively; the cam and the rotating shaft are fixedly connected, the cam is rotatably arranged in the second limit groove, and the connecting rod and the cam are fixedly connected.

8. The oil unloading sampler according to claim 1, characterized in that: The two ends of the connecting pipe are respectively a first end and a second end, and the first end of the connecting pipe is connected to the oil outlet pipe; the outer tube also includes a connecting tube, the connecting tube is connected to the second end of the connecting pipe, and the connecting tube and the connecting pipe are communicated; an oil outlet is opened on the side wall of the connecting tube, and a valve is arranged at the oil outlet.

9. The oil unloading sampler according to claim 8, characterized in that: An observation mechanism is also provided on the side wall of the connecting tube, which includes a glass tube and a sleeve. The glass tube is fixedly arranged on the connecting tube and the glass tube and the connecting tube are connected; the sleeve is fixedly arranged on the connecting tube and the sleeve is arranged on the outside of the glass tube, and a plurality of observation holes are opened on the sleeve.

10. A sampling method, using an oil unloading sampler according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: In the initial state, the first ring block and the second ring block are staggered, the outer cylinder is picked up and aligned with the oil outlet pipe for connection, and the connecting pipe is sleeved on the oil outlet pipe; S2: The end face of the oil outlet pipe first contacts the second sealing gasket and presses the second ring block to move away from the oil outlet pipe, and the second ring block drives the first ring block to move toward the oil outlet pipe through the adjusting assembly; or the end face of the oil outlet pipe first contacts the first sealing gasket and presses the first ring block to move away from the oil outlet pipe, and the first ring block drives the second ring block to move toward the oil outlet pipe through the adjusting assembly; S3: Then, the connecting pipe and the oil outlet pipe are connected through a locking mechanism; S4: Finally, open the oil outlet pipe to take out the oil.

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