A gravity type closed sampler for crude oil tank sampling

Abstract

The utility model belongs to oil tank sampler technical field, concretely relates to a kind of self-weight type closed sampler for crude oil storage tank sampling, including sampling bottle body, self-sealing bottle cap;Self-sealing bottle cap includes the cover body connected with sampling bottle body, the sealing cover that can move sealing cover body up and down, the positioning rod being set in the both sides of cover body, spring, and cross sliding ejector rod are set on positioning rod;Positioning rod is worn in sealing cover, spring is located in the bottom of sealing cover;Cross sliding ejector rod is made of rotating shaft and sliding rod, and sliding rod can rotate around rotating shaft, the both ends of rotating shaft are connected with cover body, and the short side end of sliding rod is connected with the rolling wheel that is always in contact with the top surface of sealing cover, and the long side end is used to connect sampling rope.The utility model does not need to pull bottle cap when sampling, and bottle mouth can be self-closed when sampler is pulled up and put down.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil tank samplers, specifically relating to a self-weight sealed sampler for sampling crude oil storage tanks. Background Technology

[0002] In the process of internal transfer or trade measurement of crude oil, the testing of water content, salinity, and density is a crucial step that directly affects the interests of upstream and downstream parties. Currently, crude oil sampling in storage tanks follows the requirements of GB_T 4756 2015 "Manual Sampling Method for Petroleum Liquids," using a tank sampler to take samples at multiple representative liquid levels within the tank, and then mixing the samples. Whether this process can accurately reflect the quality of the oil depends on obtaining representative oil samples.

[0003] The oil tank sampler commonly used in the petrochemical industry consists of a bottle body, a cap, a pull rod, and a rope. One end of the pull rod is connected to the rope, and the other end is connected to the cap. The pull rod and cap are fixed to the bottle body, which has a handle. During sampling, first, the cap is placed on the bottle body. Then, the rope and sampling bottle are slowly lowered to the corresponding liquid level in the storage tank. The rope is then pulled sharply to open the cap. After the bottle is filled with crude oil, it is then pulled out.

[0004] However, the sampler has the following shortcomings: (1) When the operator pulls the bottle cap during sampling, the bottle will also be subjected to an upward force and move upward, resulting in the oil sample being an upper layer sample that is not highly representative; (2) For crude oil with high viscosity and poor fluidity, there will be a situation where the crude oil is not filled in the sampling bottle and is pulled out by the operator. During this upward pulling process, oil from other points enters the bottle, causing the sample to lose its representativeness; (3) When the sampler is pulled up after sampling, the sample is easily contaminated because the bottle opening is not sealed.

[0005] Chinese patent ZL202321008636.1, entitled "A Crude Oil Sampler," includes a sampling barrel. The top surface of the sampling barrel has a storage chamber, and an oil inlet is centrally located on the bottom surface of the inner wall. A connecting pipe is connected to the outer bottom wall of the sampling barrel. Usage and working principle: In use, the user connects the fixed rod and the movable rod with ropes. Then, an external air pump is connected to a pneumatic valve via a connecting pipe. During sampling, the crude oil sampler is lowered into the oil well pipeline using ropes. Oil enters the storage chamber through the oil inlet. After the sampling barrel is lowered to the designated depth, the user can remotely control the pneumatic valve to connect the connecting pipe to the storage chamber, injecting oil into the sampling bottle. Then, the user controls the pneumatic valve to seal the connecting pipe, thus completing the oil sample collection at that depth. Multiple sampling operations are then performed. The bottle, in conjunction with the crude oil sampler, is continuously lowered to different depths to collect crude oil samples. Sampling at different depths can be achieved in a single descent. After sampling, when the crude oil sampler is lifted, the user can pull the movable rod to seal the top of the inner wall of the storage chamber, thus preventing the oil in the storage chamber from overflowing and facilitating the collection of the oil sample. After the crude oil sampler is lifted up, the oil in the storage chamber is emptied, the fixed rod is flipped upside down, and the sampling bottle is rotated off the connecting cap to collect the sample.

[0006] However, this crude oil sampler requires an external air pump and air pipe to power the pneumatic valves. The inverted sampling bottle can only be injected under pressure, making it difficult for crude oil to enter the bottle when sampling from large tanks. Furthermore, the connecting pipe is prone to blockage after sampling high-viscosity crude oil, affecting secondary sampling. Additionally, two ropes are required to connect to the fixed rod and the movable rod respectively to achieve a seal. The device is too complex and is not suitable for sampling high-viscosity, high-pour-point crude oil, nor for sampling from storage tanks.

[0007] Chinese patent ZL202120846156.7, entitled "An Oil Well Crude Oil Sampler," includes a bottle body, a self-sealing mechanism, a bottle cap, a float, a magnetic ring, an oil inlet, an iron-plated ball layer, a triggering mechanism, a triangular bracket, a support rod, a trigger switch, a rubber stopper, a signal transmitter, a battery, and a fixing lug. The self-sealing mechanism is located at the inner end of the bottle body. The self-sealing mechanism includes the bottle cap, the float, the magnetic ring, the oil inlet, and the iron-plated ball layer. The bottle cap is fixedly fitted onto the top of the bottle body, the float is placed inside the bottle body, and the oil inlet penetrates through it. The magnetic ring is embedded in the center of the bottle cap, near the edge of the oil inlet. The iron-plated ball layer covers the outer surface of the float. In this oil well crude oil sampler, the oil well fluid flows into the bottle body through the pipeline outlet to collect the crude oil. The float floats to the oil inlet at the bottle cap, and the magnetic ring, together with the iron-plated ball layer on the outer surface of the float, attracts and seals the oil inlet, ensuring the accuracy and scientific nature of crude oil collection. At the same time, it solves the problem of excessively long sampling time in traditional manual sampling due to the intermittent fluid supply of the oil well.

[0008] However, the oil well crude oil sampler is equipped with a battery, which poses a risk of fire and explosion when sampling from a storage tank. Secondly, the sampler uses an iron-plated float to seal the bottle opening, so it has requirements on the density of the crude oil. When the density is high, the float may not rise, resulting in an incomplete seal at the bottle opening. In addition, storage tank sampling is continuous, while the oil well crude oil sampler is an intermittent sampler and is not suitable for storage tank sampling. Utility Model Content

[0009] The problem to be solved by this utility model is: to design an oil tank sampler that can automatically close the bottle opening when the sampler is pulled up or lowered.

[0010] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A self-weight sealed sampler for sampling crude oil storage tanks includes a sampling bottle body and a self-sealing cap for sealing the sampling bottle body. The self-sealing cap includes a cap body connected to the sampling bottle body, a sealing cap that can move up and down to seal the cap body, positioning rods on both sides of the cap body, springs sleeved on the positioning rods, and a cross sliding top rod. The positioning rod passes through the sealing cover, and the spring is located at the bottom of the sealing cover; The cross sliding top rod consists of a rotating shaft and a sliding rod. The sliding rod can rotate around the rotating shaft. Both ends of the rotating shaft are connected to the cover body. The shorter end of the sliding rod is connected to a rolling wheel that is always in contact with the top surface of the sealing cover, and the longer end is used to connect the sampling rope. When the sliding rod is subjected to force, the rolling wheel rolls on the top surface of the sealing cover, applying force to the sealing cover. The sealing cover moves up and down along the positioning rod, squeezing the spring downwards to seal the cover body; or, after the force on the sealing cover is released, the spring returns to its original position, and the cover body opens.

[0011] Furthermore, the top two sides of the cover are provided with limiting frames to restrict the travel of the sealing cover; the two ends of the sealing cover are provided with two cover ears, which can move up and down in the limiting holes inside the limiting frames.

[0012] Furthermore, fixing nuts are provided on both sides of the sealing cover, and the bottom end of the positioning rod is fitted inside the fixing nuts.

[0013] Furthermore, the top of the spring is located between the top of the retaining nut and the bottom of the lug of the sealing cap.

[0014] Furthermore, the bottom surface of the sealing cap is convex.

[0015] Furthermore, the rotating shaft is positioned between the limiting frames on both sides of the cover.

[0016] Furthermore, a circular sampling rope attachment port is provided at one end of the longer side of the sliding rod.

[0017] Furthermore, the rolling wheel uses bearings.

[0018] Furthermore, a limiting groove is provided at the center of the top of the sealing cover to restrict the movement of the rolling wheel.

[0019] Furthermore, the roller moves from the outer edge of the sealing cover towards the center point of the horizontal plane. When it reaches the limiting groove, the sealing cover completely seals the cover body; or, the roller moves from the center point of the sealing cover towards the outer edge, and the cover body opens.

[0020] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a sliding rod that, when subjected to force, causes the rolling wheel to roll on the top surface of the sealing cap, applying force to the cap. The sealing cap moves up and down along the positioning rod, compressing the spring downwards to seal the cap body, thus automatically sealing the self-sealing bottle cap. Alternatively, when the force on the sealing cap is released, the spring returns to its original position, the cap body opens, and the self-sealing bottle cap is automatically opened. This invention provides an oil tank sampler that eliminates the need to pull the cap during sampling and allows the bottle opening to close automatically when the sampler is pulled up or down.

[0021] The self-weight sealed sampler of this utility model has a simple structure, low manufacturing cost, and is easy to maintain.

[0022] This invention provides a sealed sampler that can obtain representative oil samples from storage tanks, ensuring that the samples are representative and improving the crude oil sampling level in storage tanks. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the structure of the self-weight sealed sampler of this utility model when it is fully opened. Figure 2 This is a structural diagram of the self-weight sealed sampler of this utility model during the opening or closing process; Figure 3 This is a schematic diagram of the structure of the self-weight sealed sampler of this utility model when it is completely closed. Figure 4 This is a schematic diagram of the structure of the self-sealing bottle cap of this utility model during the opening or closing process; Figure 5 For the present utility model Figure 4 The left view.

[0024] Figure label: 10 is the sampling bottle body; 20 is the self-sealing cap; 21 is the cap body; 22 is the sealing cap; 221 is the cap lug; 222 is the limiting groove; 23 is the positioning rod; 24 is a fixing nut; 25 is a spring; 26 is a limiting frame; 261 is a fixing hole; 262 is a limiting hole; 27 is a cross sliding top rod; 271 is a rotating shaft; 272 is a sliding rod; 28 is a rolling wheel; 29 is a sampling rope attachment port. Detailed Implementation

[0025] The technical solution of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Combination Figures 1-5 As shown, this utility model provides a weight-type sealed sampler for sampling crude oil storage tanks, including a sampling bottle body 10 and a self-sealing cap 20 connected to the top of the sampling bottle body 10. The bottle mouth of the sampling bottle body 10 has an external thread structure.

[0028] The self-sealing cap 20 includes a cap body 21 connected to the sampling bottle body 10 and a sealing cap 22 that can move up and down to seal the cap body 21. The cap body 21 has internal threads and is threadedly connected to the sampling bottle body 10.

[0029] The top surface of the sealing cap 22 is flat, and the bottom surface of the sealing cap 22 is convex. The convex design can better seal the bottle opening.

[0030] The sealing cover 22 has two symmetrical cover ears 221 at both ends. The cover ears 221 are 8.9mm wide and have 5mm round holes for installing the positioning rod 23.

[0031] The self-sealing cap 20 also includes positioning rods 23 disposed on both sides of the cap body 21; the positioning rods 23 pass through the cap lugs 221, so that the sealing cap 22 can move up and down along the positioning rods 23.

[0032] The sealing cover 22 is provided with fixing nuts 24 on both sides, and the bottom end of the positioning rod 23 is sleeved inside the fixing nuts 24.

[0033] The self-sealing cap 20 also includes a spring 25 sleeved on the positioning rod 23, and the stroke of the spring 25 is located between the top of the fixing nut 24 and the bottom of the cap lug 221 of the sealing cap 22. When the sealing cap 22 is subjected to force, the spring 25 is squeezed or returns to its original position, causing the sealing cap 22 to move up and down, so that the cap body 21 is sealed or opened.

[0034] The top two sides of the cover body 21 are provided with limiting frames 26 for limiting the travel of the sealing cover 22. The limiting hole 262 inside the limiting frame 26 is 21.5mm high and 9mm wide. The limiting hole 262 allows the sealing cover 22 to move within a limited area, while the installation of the spring 25 provides a guarantee for the opening of the sealing cover 22 after sealing.

[0035] The self-sealing cap 20 also includes a cross sliding rod 27 connected to the sealing cap 22. The cross sliding rod 27 is composed of a transverse rotating shaft 271 and a longitudinal sliding rod 272 rotatably connected. The sliding rod 272 can rotate around the rotating shaft 271.

[0036] The top of the limiting frame 26 has a fixing hole 261 for fixing the rotating shaft 271, and the diameter of the fixing hole 261 is 3mm.

[0037] The left and right ends of the rotating shaft 271 of the cross sliding top rod 27 are connected to the fixing hole 261.

[0038] With the rotation axis 271 as the dividing line, the length of one side of the sliding rod 272 is longer than that of the other side, and the sliding rod 272 and the rotation axis 271 form a lever.

[0039] A roller 28 is provided on the shorter side of the sliding rod 272. The roller 28 contacts the top surface of the sealing cover 22 and can move on the sealing cover 22.

[0040] In this embodiment, a bearing is used as the rolling wheel 28. Based on the lever principle, the longer side of the sliding rod 272 rotates under force, allowing the rolling wheel 28 to roll towards the center of the sealing cap 22, applying force to the sealing cap 22 until it is located at the center of the sealing cap 22, at which point the sealing cap 22 completely seals the cap body 21, and the self-sealing bottle cap 20 automatically seals; or, the rolling wheel 28 gradually rolls away from the center of the sealing cap 22, and when the rolling wheel 28 is located at the edge of the sealing cap 22, the self-sealing bottle cap 20 is automatically opened.

[0041] The sealing cap 22 has a radius of 21.5 mm. The sliding rod 272 of the cross-shaped sliding top rod 27 has a total length of 64 mm. With the center line of the rotation axis 271 as the dividing line, the longer side of the sliding rod 272 is 40 mm long, and the shorter side is 24 mm long. This design ensures that the rolling wheel 28 always runs on the sealing cap 22 during the rotation of the cross-shaped sliding top rod 27; at the same time, the lever structure ensures that during the up and down movement of the sliding rod 272, under its own weight, the cross-shaped sliding top rod 27 can push the sealing cap 22 to compress the spring 25 at its lower part, thereby sealing the bottle mouth.

[0042] A circular sampling rope attachment port 29 is provided at one end of the long side of the sliding rod 272. The inner diameter of the sampling rope attachment port 29 is 12mm. When a sampling rope is attached to the sampling rope attachment port 29 and pulled, the upper part of the sliding rod 272 rotates, the roller 28 moves on the top of the sealing cap 22, and the cross sliding top rod 27 pushes the sealing cap 22 downward within the limiting hole 262, compressing the spring 25 and sealing the bottle mouth.

[0043] A limiting groove 222 is provided at the center of the top of the sealing cap 22 to restrict the movement of the rolling wheel 28. The limiting groove 222 is 10mm long, 3mm wide, and 2mm deep. The function of the limiting groove is to stop the rolling wheel 28 after it has completely closed the bottle mouth after the sealing cap 22 has moved into the limiting groove 222, thus limiting the rolling wheel 28 and preventing the sealing cap 22 from pushing open the cross sliding rod 27 under the force of the spring 25, which would cause the bottle mouth seal to fail.

[0044] When the sampler reaches the sampling oil layer, the operator shakes the sampling rope. The cross sliding top rod 27, under the shaking, drives the rolling wheel 28 to move out of the limiting groove 222. Then, under the reset force of the spring 25, the sealing cover 22 moves upward, and the rolling wheel 28 moves from the center point of the horizontal plane of the sealing cover 22 to the outside, so as to fully open the bottle mouth.

[0045] Working principle and usage: When the operator pulls up or lowers the sampler, the roller 28, under the action of the sampler's own weight, begins to move from the outer periphery of the horizontal plane of the sealing cover 22 towards the center point. After the sealing cover 22 is subjected to the force of the cross sliding rod 27, the spring 25 at the ear of the sealing cover 22 is compressed and moves downward. Finally, the roller 28 enters the limiting groove 222 at the center position of the sealing cover 22, and the sealing cover 22 completely seals the mouth of the sampling bottle.

[0046] When the sampler reaches the sampling oil layer, the operator shakes the sampling rope. The cross sliding top rod 27, under the shaking, drives the rolling wheel 28 to move out of the limiting groove 222. Then, under the force of the spring 25, the sealing cover 22 moves upward, and the rolling wheel 28 moves from the center point of the horizontal plane of the sealing cover 22 to the outside, so as to fully open the bottle mouth.

[0047] The above technical features constitute the preferred embodiment of this utility model, which has strong adaptability and optimal implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

[0048] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A gravity-type sealed sampler for sampling crude oil storage tanks, comprising a sampling bottle body, characterized in that, It also includes self-sealing caps for sealing the sampling bottles; The self-sealing cap includes a cap body connected to the sampling bottle body, a sealing cap that can move up and down to seal the cap body, positioning rods on both sides of the cap body, springs sleeved on the positioning rods, and a cross sliding top rod. The positioning rod passes through the sealing cover, and the spring is located at the bottom of the sealing cover; The cross sliding top rod consists of a rotating shaft and a sliding rod. The sliding rod can rotate around the rotating shaft. Both ends of the rotating shaft are connected to the cover body. The shorter end of the sliding rod is connected to a rolling wheel that is always in contact with the top surface of the sealing cover, and the longer end is used to connect the sampling rope. When the sliding rod is subjected to force, the rolling wheel rolls on the top surface of the sealing cover, applying force to the sealing cover. The sealing cover moves up and down along the positioning rod, squeezing the spring downwards to seal the cover body; or, after the force on the sealing cover is released, the spring returns to its original position, and the cover body opens.

2. The self-weight sealed sampler for crude oil storage tank sampling according to claim 1, characterized in that, The top two sides of the cover are provided with limiting frames to restrict the travel of the sealing cover; the two ends of the sealing cover are provided with two cover ears, which can move up and down through the limiting holes inside the limiting frames.

3. A gravity-type sealed sampler for crude oil storage tank sampling according to claim 2, characterized in that, The sealing cap has fixing nuts on both sides, and the bottom end of the positioning rod is fitted inside the fixing nuts.

4. A gravity-type sealed sampler for crude oil storage tank sampling according to claim 3, characterized in that, The top of the spring is located between the top of the retaining nut and the bottom of the lug of the sealing cap.

5. A gravity-type sealed sampler for crude oil storage tank sampling according to any one of claims 1-4, characterized in that, The bottom surface of the sealing cap is convex.

6. A gravity-type sealed sampler for crude oil storage tank sampling according to any one of claims 2-4, characterized in that, The rotating shaft is located between the limiting frames on both sides of the cover.

7. A gravity-type sealed sampler for crude oil storage tank sampling according to any one of claims 1-4, characterized in that, A circular sampling rope attachment point is provided at one end of the longer side of the sliding rod.

8. A gravity-type sealed sampler for crude oil storage tank sampling according to any one of claims 1-4, characterized in that, The rolling wheel uses bearings.

9. A gravity-type sealed sampler for crude oil storage tank sampling according to any one of claims 1-4, characterized in that, A limiting groove is provided at the center of the top of the sealing cover to restrict the movement of the rolling wheel.

10. A gravity-type sealed sampler for crude oil storage tank sampling according to claim 9, characterized in that, The roller moves from the outer edge of the sealing cover towards the center point of the horizontal plane. When it reaches the limiting groove, the sealing cover completely seals the cover body; or, the roller moves from the center point of the horizontal plane of the sealing cover towards the outer edge, and the cover body opens.

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