A sampler for gasoline detection

Abstract

The utility model provides a kind of sampler for gasoline detection, comprising: sampling rod and the sampling hole being opened in the one end of sampling rod;Sampling rod one end is divided into several sampling chambers, and several sampling holes are oppositely arranged with several sampling chambers;Sampling bin is arranged in the one end of sampling rod, and several liquid inlet holes are opened in sampling bin;And liquid inlet device is arranged between several liquid inlet holes and several sampling holes;Several sampling chamber bottoms are respectively provided with liquid outlet pipe, and liquid outlet pipe is communicated with the liquid outlet device arranged in the one end of sampling rod;And liquid outlet device is communicated with several liquid storage bottles by pipeline;Control group is connected with liquid inlet device by control line;Several pressure measuring bodies are arranged on sampling bin, and are respectively adjacent to several liquid inlet holes;And several pressure measuring bodies are connected with control group by control line;The sampler for gasoline detection proposed in the utility model avoids sample cross mixing, ensures that each stratified sample truly reflects gasoline quality, and provides accurate sample support for quality control.

Description

Technical Field

[0001] This utility model relates to the field of sampling device technology, and in particular to a sampler for gasoline detection. Background Technology

[0002] In the petrochemical production, refined oil transportation, and storage processes, gasoline quality testing is a crucial step in ensuring the safe operation of equipment and compliance with environmental regulations and product standards. Accurate and efficient sampling is a prerequisite for ensuring the reliability of test results. Currently, gasoline storage containers are diverse, encompassing large storage tanks, tank trucks, and small drums. The depths of these containers vary significantly (ranging from 30cm to 10m), and gasoline is prone to stratification during storage due to density differences and moisture settling. The quality indicators (such as sulfur content, moisture content, and flash point) of the upper and lower layers of gasoline may differ significantly. This places high demands on the depth adaptability and stratification sampling capabilities of the sampler.

[0003] Existing gasoline samplers require separate sampling for gasoline at different depths during sample collection. Since the sample delivery channel is a single cavity, samples from different depths are prone to mixing during transport, making stratified detection impossible. This can lead to deviations in test results and fail to provide a reliable basis for quality control. Utility Model Content

[0004] The purpose of this utility model is to provide a gasoline testing sampler that can solve the above-mentioned technical problems;

[0005] This utility model provides a sampler for gasoline detection, comprising:

[0006] A sampling rod and several sampling holes opened at one end of the sampling rod; and a shelf is provided inside one end of the sampling rod, and several partitions are provided between the shelf and the bottom of one end of the sampling rod to divide one end of the sampling rod into several sampling chambers, with several sampling holes and several sampling chambers arranged opposite to each other.

[0007] A sampling chamber is set at one end of the sampling rod, and several sampling holes are placed inside the sampling chamber; at the same time, several liquid inlet holes are opened on the sampling chamber, and the liquid inlet holes are arranged opposite to the several sampling holes; and a liquid inlet device that can be independently turned on and off is set between the several liquid inlet holes and the several sampling holes.

[0008] Several sampling chambers are equipped with liquid outlet pipes at the bottom, which are connected to liquid outlet devices located at one end of the sampling rod; and the liquid outlet devices are connected to several storage bottles through pipes.

[0009] The control unit is located at the other end of the sampling rod and is connected to the liquid inlet device via a control line.

[0010] Several pressure gauges, used to detect the pressure at the corresponding liquid inlet to determine the sampling depth, are installed on the sampling chamber and are respectively arranged adjacent to several liquid inlets; and the pressure gauges are all connected to the control group through control lines.

[0011] As a further technical solution, a control cavity is provided at the other end of the sampling rod, and the control group is set inside the control cavity.

[0012] As a further technical solution, the control group includes:

[0013] The control panel is located inside the control cavity;

[0014] Several control keys are inserted into the control hole at one end of the sampling rod and connected to the control board.

[0015] As a further technical solution, it also includes: an energy storage element, which is installed inside the control cavity and connected to the control board.

[0016] As a further technical solution, it also includes: a display screen for displaying data of several pressure bodies, which is set in the display hole at one end of the sampling rod and connected to the control board.

[0017] As a further technical solution, one end of the sampling rod is also provided with a cap for sealing the control cavity, and an operating ring is provided on the cap.

[0018] As a further technical solution, the sampling chamber includes a chamber body and a chamber cover. The chamber body is set on the sampling rod, and the chamber cover is sleeved on the sampling rod and threadedly connected to the chamber body.

[0019] As a further technical solution, the liquid discharge device includes:

[0020] Connecting cover and several connecting valves disposed on the connecting cover;

[0021] Several connecting valves are connected to several liquid outlet pipes;

[0022] The connecting ring engages with the limiting plate on the connecting cover; in the connected state, the connecting ring is threadedly connected to the connecting wing on one end of the sampling rod.

[0023] As a further technical solution, the sampling rod includes:

[0024] The acquisition segment and the control segment are connected by a docking ring.

[0025] As a further technical solution, an extension section is provided between the acquisition section and the control section, with both ends of the extension section connected to the acquisition section and the control section respectively via docking rings.

[0026] This invention's technical solution divides the sampling rod into independent sampling chambers using shelves and partitions. Each sampling chamber corresponds to a dedicated sampling port, liquid inlet device, and liquid outlet channel, achieving physical isolation of "one port, one chamber, one channel." This completely avoids cross-mixing of samples, ensuring that each layer of samples accurately reflects gasoline quality and providing precise sample support for quality control. Furthermore, a pressure gauge is installed next to the liquid inlet of the sampling chamber to monitor pressure changes at each sampling location in real time and transmit the data to the control group. This helps operators accurately determine the sampling depth, avoids positioning errors, and ensures the accuracy of the sampling location. Moreover, the multi-channel design of this invention allows for simultaneous collection of samples from multiple depths in a single operation: after placing the sampling rod, the liquid inlet is uniformly controlled by the control group, and the sample directly enters the storage bottle through an independent outlet tube, eliminating the need for repeated disassembly and reassembly. This improves sampling efficiency and is suitable for batch testing scenarios. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a perspective view of a gasoline testing sampler according to the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of a gasoline testing sampler according to the present invention;

[0030] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0031] Figure 4 for Figure 2 Cross-sectional view along the BB direction;

[0032] Figure 5 This is a perspective view of another embodiment of a gasoline testing sampler according to the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100-Sampling rod; 101-Sampling hole; 102-Shelf; 103-Partition; 104-Sampling chamber; 105-Discharge pipe; 106-Control chamber; 107-Cap; 108-Operating ring; 109-Connecting wing; 200-Sampling compartment; 201-Inlet; 202-Compartment body; 203-Compartment cover; 204-Inlet device; 300-Discharge device; 301-Connecting cover; 302-Connecting valve; 303-Connecting ring; 304-Limiting plate; 400-Storage bottle; 401-Connecting pipe; 402-Exhaust valve; 500-Control group; 501-Control board; 502-Control key; 503-Storage element; 504-Display screen; 600-Pressure measuring element; 701-Collection section; 702-Control section; 703-Docking ring; 704-Extension section. Detailed Implementation

[0035] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the 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.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] like Figure 1-5 As shown, the present invention proposes a sampler for gasoline detection, comprising:

[0039] The sampling rod 100 includes a plurality of sampling holes 101 at one end of the sampling rod 100; a shelf 102 is provided inside one end of the sampling rod 100, and a plurality of partitions 103 are provided between the shelf 102 and the bottom of one end of the sampling rod 100, dividing one end of the sampling rod 100 into a plurality of sampling chambers 104, with the plurality of sampling holes 101 and the plurality of sampling chambers 104 arranged opposite to each other; a sampling chamber 200 is provided at one end of the sampling rod 100, and the plurality of sampling holes 101 are placed inside the sampling chamber 200; at the same time, a plurality of liquid inlet holes 201 and a plurality of liquid inlet holes 202 are provided on the sampling chamber 200. The sample is positioned opposite to several sampling holes 101; and a liquid inlet device 204 is provided between several liquid inlet holes 201 and several sampling holes 101. During use, the liquid inlet device 204 is placed in gasoline, and the liquid inlet device 204 can be controlled to allow gasoline to enter the sampling holes 101 through the liquid inlet device 204 and then enter the sampling chamber 104 through the sampling holes 101. In addition, according to actual use needs, the liquid inlet device 204 can be opened at different gasoline levels to allow gasoline to enter the sampling chamber 104, thereby achieving sample collection at different liquid levels.

[0040] Each of the sampling chambers 104 has a liquid outlet pipe 105 at its bottom, which is connected to a liquid outlet device 300 located at one end of the sampling rod 100. The liquid outlet device 300 is connected to several storage bottles 400 via pipes. When gasoline enters the sampling chamber 104, it is transferred to the liquid outlet device 300 through the liquid outlet pipe 105, then into the pipes, and finally into the storage bottles 400. The gasoline sample is stored in the storage bottles 400 for subsequent testing. It should be noted that the number of sampling chambers 104, liquid inlet devices 204, liquid outlet pipes 105, liquid outlet devices 300, and storage bottles 400 is the same, with three of each in this invention. This allows for the collection of gasoline at different liquid levels through different sampling chambers 104 and storage in different storage bottles 400, thus avoiding mutual interference between the oils during transfer. Preferably, the liquid inlet device 204 is a solenoid valve.

[0041] The control group 500 is located at the other end of the sampling rod 100 and is connected to the liquid inlet device 204 via a control line; several pressure measuring elements 600 are installed on the sampling chamber 200 and are respectively arranged adjacent to several liquid inlet holes 201; and the pressure measuring elements 600 are all connected to the control group 500 via control lines; before the sampling rod 100 is inserted into the gasoline, the pressure and depth parameters are calibrated according to the actual density of the gasoline, for example, when the gasoline density is 0.72 g / cm³. 3For every 705.6 Pa increase in pressure, the sampling depth increases by 10 cm. Calibration parameters can be entered into the control group 500 via an external computer. After the sampling rod 100 is inserted into the gasoline, the pressure at the location is detected by several pressure measuring bodies 600. When the required pressure is reached, the pressure measuring bodies 600 send the detection data to the control group 500 via a control line. After receiving the pressure signal, the control group 500 controls the liquid inlet device 204 to open. The gasoline enters the sampling hole 101 through the liquid inlet device 204 and then enters the sampling chamber 104 through the sampling hole 101. After entering the sampling chamber 104, the gasoline enters the liquid outlet pipe 105 and is then transported by the liquid outlet pipe 105 to the liquid outlet device 300. The gasoline is then transported to the liquid storage bottle 400 through the pipe connecting the liquid outlet device 300 and the liquid storage bottle 400 for storage.

[0042] It should be noted that the number of pressure measuring bodies 600 is the same as that of the liquid inlet devices 204, so as to realize pressure detection at the location of each liquid inlet device 204; when one of the sampling chambers 104 has finished sampling, the sampling rod 100 is pulled up and the pressure is detected by the pressure measuring body 600. The control group 500 controls the other liquid inlet devices 204 to open and collect samples at their respective locations; the preferred pressure measuring body 600 is a pressure sensor.

[0043] The technical solution of this utility model divides the sampling rod 100 into independent sampling chambers 104 through the layer plate 102 and the partition plate 103. Each sampling chamber 104 corresponds to a dedicated sampling hole 101, liquid inlet device 204 and liquid outlet channel, realizing "one hole, one chamber, one channel" physical isolation, completely avoiding cross-mixing of samples, ensuring that the samples of each layer truly reflect the quality of gasoline, and providing accurate sample support for quality control. In addition, a pressure measuring body 600 is set next to the liquid inlet hole 201 of the sampling chamber 200, which can monitor the pressure changes of each sampling position in real time and transmit them to the control group 500. This can help operators accurately judge the sampling depth, avoid positioning errors, and ensure the accuracy of the sampling position. Furthermore, the multi-channel design of this utility model allows for the simultaneous collection of samples at multiple depths in one operation: after placing the sampling rod 100, the liquid inlet is uniformly controlled by the control group 500, and the sample is directly put into the storage bottle 400 through the independent liquid outlet tube 105, without repeated disassembly and assembly, improving sampling efficiency and adapting to batch testing and other scenarios.

[0044] like Figure 3As shown, a control cavity 106 is provided at the other end of the sampling rod 100, and a control group 500 is disposed within the control cavity 106. Specifically, the control group 500 includes a control plate 501 disposed within the control cavity 106; several control keys 502 are inserted through control holes at one end of the sampling rod 100 and connected to the control plate 501; the liquid inlet device 204 and the pressure measuring body 600 are both connected to the control plate 501; several control keys 502 are disposed on the control plate 501. When pressure data is obtained through the pressure measuring body 600, a control signal is generated by operating the control keys 502, and the signal is transmitted through the control plate 501. A control signal is transmitted to the liquid inlet device 204 to open it, allowing gasoline to enter the sampling chamber 104. After sampling, the control key 502 is pressed again to close the liquid inlet device 204. By changing the position of the sampling rod 100, other control keys 502 can be operated to open other liquid inlet devices 204, thus enabling the collection of gasoline samples at different liquid levels. The preferred control board 501 is a PLC control board, which can be connected to the inner wall of the sampling rod 100 by adhesive or fixed to the inner wall of the sampling rod 100 by bolts. In this invention, there are three control keys 502.

[0045] In addition, this utility model includes a power storage body 503, which is located inside the control cavity 106 and connected to the control board 501. In use, the power storage body 503 provides the electrical energy required for the operation of several liquid inlet devices 204. Specifically, one end of the control line is connected to the control board 501, and the other end passes through the wire hole at the bottom of the control cavity 106 and the wire hole on the side wall of the sampling rod 100 before being placed inside the sampling chamber 200 and connected to several liquid inlet devices 204. Similarly, the control line connecting several pressure measuring bodies 600 passes through the wire hole on the side wall of the sampling rod 100 and the wire hole at the bottom of the control cavity 106 before being connected to the control board 501, so as to realize the feedback of pressure signals to the control board 501 through the control line. At the same time, the control cavity 106 adopts an explosion-proof structure, the power storage body 503 is an explosion-proof lithium battery, and the control key 502 and the display screen 504 adopt an explosion-proof sealed design to prevent electric sparks from igniting gasoline vapors.

[0046] Of course, in order to better display the pressure signals of the pressure measuring bodies 600, a display screen 504 is preferably provided. The display screen 504 is located in the display hole at one end of the sampling rod 100 and is connected to the control board 501. The display screen 504 displays the data of the pressure measuring bodies 600. Specifically, after the pressure signals detected by the pressure measuring bodies 600 are fed back to the control board 501, the control board 501 displays the acquired pressure signals on the display screen 504. Then, the operator controls the control key 502 according to the display results on the display screen 504 to open the liquid inlet device 204.

[0047] In this invention, the top of the sampling rod 100 (the gripping end during use) is an open structure, which communicates with the control cavity 106; thus enabling the assembly and disassembly of the control board 501, several control components, the energy storage unit 503, and the control wires; however, in actual use, the open structure needs to be sealed; therefore, one end of the sampling rod 100 is also provided with a cover 107 for sealing the control cavity 106, and an operating ring 108 is provided on the cover 107; thus, during operation, the control cavity 106 can be sealed by the cover 107. The top of the sampling rod 100 is sealed to prevent foreign objects from entering the control cavity 106. The cap 107 is threaded to the top of the sampling rod 100. When disassembling or assembling the cap 107, the operating ring 108 can be operated to improve the efficiency of disassembly or assembly. Of course, a hanging rope can also be set on the operating ring 108 during use. When operating the sampling rod 100, the hanging rope can be put around the operator's wrist to prevent the sampling rod 100 from slipping during use and improve the stability of operation.

[0048] like Figure 3 As shown, the sampling chamber 200 includes a chamber body 202 and a chamber cover 203. The chamber body 202 is mounted on the sampling rod 100, and the chamber cover 203 is fitted onto the sampling rod 100 and threadedly connected to the chamber body 202. The chamber body 202 and the sampling rod 100 can be fixed by welding to ensure the stability and sealing of the chamber body 202. In use, the liquid inlet device 204 is installed inside the chamber body 202, and after connecting the liquid inlet device 204 to the control line, the chamber cover 203 is connected to the chamber body 202. Preferably, the chamber cover 203 and the chamber body 202 are threaded together. A sealing ring is provided between the chamber body 202 and the chamber cover 203 to ensure the sealing between the chamber body 202 and the chamber cover 203.

[0049] It should be noted that several liquid inlet holes 201 are provided on the chamber body 202. When installing the liquid inlet device 204, sealant needs to be filled between the end of the liquid inlet device 204 placed on the liquid inlet hole 201 and the liquid inlet hole 201 to increase the sealing between the liquid inlet device 204 and the liquid inlet hole 201. At the same time, sealant is also filled between the end of the liquid inlet device 204 placed on the sampling hole 101 and the sampling hole 101 to prevent gasoline from leaking directly through the gap between the liquid inlet hole 201 and the chamber body 202 instead of entering the sampling chamber 104 through the liquid inlet device 204 and the sampling hole 101.

[0050] like Figure 2-3As shown, the liquid dispensing device 300 includes a connecting cover 301 and a plurality of connecting valves 302 disposed on the connecting cover 301; the plurality of connecting valves 302 are connected to a plurality of liquid dispensing pipes 105; a connecting ring 303 is engaged with a limiting plate 304 on the connecting cover 301; in the connected state, the connecting ring 303 is threadedly connected to a connecting wing 109 at one end of the sampling rod 100; during installation, the liquid dispensing pipe 105 is inserted into the connecting valve 302, and then the connecting ring 303 is threadedly connected to the connecting wing 109; it should be noted that a seal is provided between the connecting cover 301 and the bottom of the sampling rod 100. A rubber ring is provided to ensure that gasoline does not enter the connecting cover 301 between the bottom of the sampling rod 100 and the connecting cover 301 after installation. At the same time, at least two limiting grooves are provided on the outer wall of the outlet pipe 105, and a rubber ring is provided in the limiting groove. When the outlet pipe 105 is inserted into the connecting valve 302, the rubber ring increases the sealing between the outlet pipe 105 and the connecting valve 302, preventing gasoline from overflowing between the outlet pipe 105 and the connecting valve 302 during the transmission process. Preferably, the connecting valve 302 is a one-way valve to prevent the transmitted gasoline sample from flowing back into the sampling chamber 104.

[0051] Figure 1 The original design only had one storage bottle 400, connected to a connecting valve 302 via a pipe. However, this invention features three storage bottles 400 (not shown in the figure), each connected to a connecting valve 302 via a pipe. This allows gasoline from the three sampling chambers 104 to enter different storage bottles 400 through the connecting valves 302, preventing contact and interference during transport. Additionally, each storage bottle 400 is equipped with a connecting pipe 401 and an exhaust valve 402. The connecting pipe 401 connects to the connecting valve 302 via a pipe. The exhaust valve 402 expels air from the storage bottle 400 as gasoline enters. Furthermore, the inside of the bottle cap of each storage bottle 400 is fitted with an oil-resistant nitrile rubber sealing gasket, sealed via a threaded connection. Both the connecting pipe 401 and the exhaust valve 402 are located on the bottle cap, and the exhaust valve 402, when closed, ensures sealed sample storage.

[0052] In actual use, the liquid storage bottle 400 needs to be positioned below the sampling rod 100 at the gasoline end to ensure that gasoline can enter the liquid storage bottle 400 under air pressure. When in use, after the liquid inlet device 204 is turned on, the liquid storage bottle 400 can be squeezed to fill the pipeline with gasoline. As the gasoline enters the liquid storage bottle 400, the gas inside the liquid storage bottle 400 is discharged through the exhaust valve 402. In addition, the liquid storage bottle 400 is made of transparent material, so that the amount of sample stored in the liquid storage bottle 400 can be observed. The control key 502 is operated to close the liquid inlet device 204. Preferably, the exhaust valve 402 is a one-way valve to prevent air from entering the liquid storage bottle 400 through the exhaust valve 402.

[0053] like Figure 5 As shown, the sampling rod 100 includes a collection section 701 and a control section 702, which are connected by a docking ring 703. This allows for easy storage by separating the collection section 701 and control section 702, reducing the overall size. It should be noted that the control line is equipped with terminals as in the prior art. After separating the collection section 701 and control section 702, the terminals between the control lines can be disconnected for separate storage. Furthermore, threads are provided at adjacent positions of the collection section 701 and control section 702, and threads are also provided on the docking ring 703. During connection, the collection section 701 and control section 702 are docked, and the docking ring 703 is rotated to fix them in place. Simultaneously, a sealing ring is provided between the collection section 701 and control section 702 to prevent gasoline from entering the sampling rod 100.

[0054] Of course, to better collect samples at different liquid levels for different usage scenarios, an extension section 704 is preferably provided between the collection section 701 and the control section 702. The two ends of the extension section 704 are connected to the collection section 701 and the control section 702 respectively through docking rings 703. In this way, the extension section 704 can increase the overall length, thereby meeting the needs of different usage scenarios. It should be noted that when using the extension section 704, a control line also needs to be added in the channel inside the extension section 704 (the channel has the same internal size as the control section 702 and the collection section 701), and connected to the control line placed in the control section 702 and the collection section 701 through the wiring terminal. The control section 702 and the collection section 701 are connected to the extension section 704 through the docking rings 703 respectively, and a sealing ring is provided between the extension section 704 and the collection section 701 and the control section 702. At the same time, the length of the extension section 704 can be adjusted according to actual needs, and this utility model does not further limit it.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sampler for gasoline detection, characterized in that, include: A sampling rod (100) and a plurality of sampling holes (101) opened at one end of the sampling rod (100); and a shelf (102) is provided inside one end of the sampling rod (100), and a plurality of partitions (103) are provided between the shelf (102) and the bottom of one end of the sampling rod (100) to divide one end of the sampling rod (100) into a plurality of sampling chambers (104), and the plurality of sampling holes (101) and the plurality of sampling chambers (104) are arranged opposite to each other; A sampling chamber (200) is provided at one end of the sampling rod (100), and a plurality of sampling holes (101) are placed inside the sampling chamber (200); at the same time, a plurality of liquid inlet holes (201) are provided on the sampling chamber (200), and the plurality of liquid inlet holes (201) are arranged opposite to the plurality of sampling holes (101); and a liquid inlet device (204) capable of independent opening and closing is provided between the plurality of liquid inlet holes (201) and the plurality of sampling holes (101); Several sampling chambers (104) are respectively provided with liquid outlet pipes (105) at the bottom, and the liquid outlet pipes (105) are connected to the liquid outlet device (300) provided at one end of the sampling rod (100); and the liquid outlet device (300) is connected to several liquid storage bottles (400) through pipes; A control unit (500) is located at the other end of the sampling rod (100) and is connected to the liquid inlet device (204) via a control line; Several pressure measuring bodies (600) for detecting the pressure at the corresponding liquid inlet (201) to determine the sampling depth are set on the sampling chamber (200) and are respectively arranged adjacent to the several liquid inlet (201); and the several pressure measuring bodies (600) are all connected to the control group (500) through control lines.

2. The gasoline sampler according to claim 1, characterized in that, The other end of the sampling rod (100) is provided with a control cavity (106), and the control group (500) is disposed in the control cavity (106).

3. The gasoline sampler according to claim 2, characterized in that, The control group (500) includes: A control panel (501) is disposed within the control cavity (106); Several control keys (502) are inserted into the control hole at one end of the sampling rod (100) and connected to the control board (501).

4. The gasoline sampler according to claim 3, characterized in that, Also includes: The energy storage element (503) is disposed in the control cavity (106) and connected to the control board (501).

5. The gasoline sampler according to claim 4, characterized in that, Also includes: A display screen (504) for displaying data of several pressure gauges (600) is set in a display hole at one end of the sampling rod (100) and connected to the control board (501).

6. The gasoline sampler according to claim 5, characterized in that, The sampling rod (100) is also provided with a cover (107) for sealing the control cavity (106) at one end, and an operating ring (108) is provided on the cover (107).

7. The gasoline sampler according to claim 1, characterized in that, The sampling chamber (200) includes a chamber body (202) and a chamber cover (203). The chamber body (202) is disposed on the sampling rod (100), and the chamber cover (203) is sleeved on the sampling rod (100) and threadedly connected to the chamber body (202).

8. The gasoline sampler according to claim 1, characterized in that, The liquid dispensing device (300) includes: A connecting cover (301) and a plurality of connecting valves (302) disposed on the connecting cover (301); Several of the connecting valves (302) are connected to several outlet pipes (105); The connecting ring (303) is engaged with the limiting plate (304) on the connecting cover (301); in the connected state, the connecting ring (303) is threadedly connected to the connecting wing (109) on one end of the sampling rod (100).

9. The gasoline sampler according to claim 1, characterized in that, The sampling rod (100) includes: The acquisition section (701) and the control section (702) are connected by a docking ring (703).

10. The gasoline sampler according to claim 9, characterized in that, An extension section (704) is provided between the acquisition section (701) and the control section (702), and the two ends of the extension section (704) are respectively connected to the acquisition section (701) and the control section (702) through docking rings (703).

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