A multi-channel split-flow sampling device

Abstract

The utility model relates to transformer oil detection technical field discloses a kind of multi-channel shunt sampling device, comprising: sampling bottle, extraction component, shunt component and infusion component;The bottle mouth of sampling bottle is provided with sealing cover;Extraction component includes: sampling member, liquid suction tube and liquid outlet pipe, sampling member is set in sealing cover, one end of liquid suction tube is connected with the liquid inlet end of sampling member, the other end is inserted into the bottom of sampling bottle, one end of liquid outlet pipe is connected with the liquid outlet end of sampling member;Shunt component includes: installation shell, shunt column and multiple shunt pipes, installation shell is set in sealing cover, shunt column is set in installation shell, it has multiple shunt ports, one end of each shunt pipe is connected with a shunt port;The liquid inlet of each group infusion component is connected with the other end of a shunt pipe, and the liquid outlet thereof is adapted to be connected with measuring device.The utility model can supply different measuring device to carry out different characteristic detection each time sampling, sampling process is simple and convenient, and detection efficiency is also higher.

Description

Technical Field

[0001] This utility model relates to the field of transformer oil testing technology, specifically to a multi-channel shunt sampling device. Background Technology

[0002] Transformer oil is a specially treated mineral oil primarily used in power transformers for insulation, heat dissipation, and arc suppression. Its significantly higher insulation strength than air effectively improves the insulation performance of internal transformer insulation materials and protects them from moisture corrosion. Due to its high specific heat, transformer oil is often used as a coolant. The heat generated during transformer operation causes the oil to expand and rise; through vertical convection, the heat is dissipated via the radiator, ensuring the transformer's normal operation. In oil circuit breakers and on-load tap changers, electric arcs are generated during contact switching. Utilizing the excellent thermal conductivity of transformer oil, it decomposes under the high temperature of the arc, releasing a large amount of gas and generating significant pressure, thereby improving the arc-extinguishing performance of the medium and rapidly extinguishing the arc.

[0003] To ensure that transformer oil meets usage standards, it needs to be sampled and tested. One existing sampling device includes a collection component, an extraction component, a reversing valve, and a sampling bottle. The reversing valve, located on the collection component, has three connection ports, connecting to the extraction component, the transformer under test, and the sampling bottle, respectively. First, the port connecting the reversing valve to the sampling bottle is closed, while the other ports are opened. Power is supplied by the extraction component to draw transformer oil from the transformer under test into the collection component. Then, the port connecting the reversing valve to the extraction component is closed, and the other ports are opened, allowing the transformer oil to flow into the sampling bottle for subsequent testing and analysis.

[0004] However, transformer oil testing typically requires examining multiple properties, including pour point, water content, interfacial tension, pH, breakdown voltage, and resistivity, to ensure it meets usage standards. Existing sampling devices require separate sampling of the transformer oil each time different properties are tested, leading to frequent sampling and reduced subsequent testing efficiency. Utility Model Content

[0005] This invention provides a multi-channel shunt sampling device to solve the problem that existing sampling devices require separate sampling of transformer oil each time different characteristics are detected, which leads to a more frequent sampling process and reduces the efficiency of subsequent detection.

[0006] In a first aspect, this utility model provides a multi-channel shunt sampling device, comprising: A sampling bottle, the mouth of which is provided with a sealing cap, and the sample liquid to be tested is placed inside the sampling bottle; An extraction assembly includes a sampling element, a liquid extraction tube, and a liquid outlet tube. The sampling element is disposed on the sealing cap. One end of the liquid extraction tube is connected to the liquid inlet of the sampling element, and the other end extends into the bottom of the sampling bottle. One end of the liquid outlet tube is connected to the liquid outlet of the sampling element. The diversion assembly includes: a mounting shell, a diversion column, and a plurality of diversion tubes. The mounting shell is disposed on the sealing cover, and the diversion column is disposed on the mounting shell and has a plurality of diversion ports. One end of each diversion tube is connected to one of the diversion ports. The infusion assembly has an inlet connected to the other end of one of the shunt tubes, and its outlet is adapted to connect to a sample measuring device.

[0007] Beneficial effects: The extraction component can extract the sample liquid to be tested from the sampling bottle to the splitting component, and then split it into multiple splitting tubes through the splitting column. Then, it is delivered to different testing devices through multiple sets of infusion components. In this way, each sampling can supply different testing devices for the detection of different characteristics. The sampling process is simple and convenient, and the detection efficiency is also higher.

[0008] In an optional embodiment, the infusion assembly includes: a delivery tube, a sealing mechanism, and a delivery tube, wherein the inlet of the delivery tube is connected to the other end of the diversion tube, the sealing mechanism is disposed inside the delivery tube, one end of the delivery tube can be inserted from the outlet of the delivery tube, and the sealing mechanism has an open state when the delivery tube is inserted into the delivery tube and a sealed state when the delivery tube is pulled out of the delivery tube.

[0009] In an optional embodiment, the sealing mechanism includes a baffle and an elastic element. The baffle is slidably disposed inside the conveying pipe and has a plurality of liquid outlet holes. One end of the elastic element is connected to the inner wall of the conveying pipe, and the other end is connected to the side of the baffle away from the outlet. A first sealing element is disposed on the side of the baffle close to the outlet.

[0010] In an optional embodiment, the end of the delivery pipe inserted into the transfer pipe has a liquid inlet.

[0011] Beneficial effects: When the delivery tube is inserted into the transfer tube, the baffle is pushed away from the outlet. The sample liquid enters from the inlet of the transfer tube, then flows through the outlet hole on the baffle and the inlet hole on the delivery tube into the transfer tube. When the delivery tube is pulled out of the transfer tube, the elastic element pushes the baffle back to its original position, and the first sealing element seals the tube, preventing leakage of the sample liquid from the outlet. This type of infusion assembly allows for the selection of an appropriate number of diversion channels for sampling based on actual testing needs.

[0012] In an optional implementation, an anti-slip sleeve is provided on the outside of the delivery pipe.

[0013] In an optional embodiment, a positioning sleeve is provided on the outer side of the anti-slip cylinder, and the positioning sleeve is threadedly connected to the transmission pipe.

[0014] Beneficial effects: The anti-slip sleeve and positioning sleeve can be quickly connected and fixed to the conveying pipe.

[0015] In an optional embodiment, the sampling bottle has a sampling tube at its opening, a sealing cap is disposed on the sampling tube, and the sealing cap is connected to the sampling tube via a positioning mechanism.

[0016] In an optional embodiment, the positioning mechanism includes: a mounting block, a telescopic rod, a sliding block, a connecting rod, and a fixing plate. The mounting block is disposed on the sampling tube. The fixed end of the telescopic rod is connected to the mounting block, and its driving end is connected to the sliding block. The telescopic rod is adapted to drive the sliding block to move along the height direction of the sampling bottle. One end of the connecting rod is hinged to the sliding block, and the other end is provided with a locking block. The fixing plate is disposed on the sealing cap and has a locking groove thereon. The locking block engages with the locking groove.

[0017] Beneficial effects: By setting a positioning mechanism, the sealing cap and the sampling tube can be quickly connected and disassembled.

[0018] In an optional embodiment, the positioning mechanism further includes a guide rod disposed on the sampling bottle, and the sliding block is slidably connected to the guide rod.

[0019] In an optional implementation, a second seal is provided between the sealing cap and the sampling tube.

[0020] Beneficial effects: The positioning mechanism enables a good seal between the sealing cap and the sampling tube. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of a multi-channel diversion sampling device according to the present invention; Figure 2 for Figure 1 A magnified view of part A in the diagram; Figure 3 for Figure 1 A magnified view of part B in the diagram; Figure 4 This is a top view of a multi-channel shunt sampling device according to the present invention; Figure 5 This is a schematic diagram showing the connection between the delivery tube and the sealing mechanism in a multi-channel diversion sampling device of this utility model; Figure 6 This is a schematic diagram of the baffle in a multi-channel shunt sampling device according to the present invention.

[0023] Explanation of reference numerals in the attached figures: 1. Sampling bottle; 2. Sealing cap; 31. Sampling component; 32. Liquid extraction tube; 33. Liquid outlet tube; 41. Mounting housing; 42. Diverter column; 43. Diverter pipe; 5. Infusion assembly; 51. Delivery tube; 52. Sealing mechanism; 521. Baffle; 5211. Outlet; 522. Elastic element; 523. First seal; 524. Third seal; 53. Delivery tube; 531. Inlet; 54. Anti-slip sleeve; 55. Positioning sleeve; 56. Fourth seal. 6. Sampling tube; 7. Positioning mechanism; 71. Mounting block; 72. Telescopic rod; 73. Sliding block; 74. Connecting rod; 75. Fixing plate; 76. Locking block; 77. Guide rod. 8. Second sealing element. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0025] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0026] According to an embodiment of the present invention, a multi-channel diversion sampling device is provided, comprising: a sampling bottle 1, an extraction component, a diversion component, and an infusion component 5. The sampling bottle 1 has a sealing cap 2 at its opening, and the sampling bottle 1 is suitable for holding the sample liquid to be tested. The extraction component includes: a sampling element 31, a suction tube 32, and an outlet tube 33. The sampling element 31 is disposed on the sealing cap 2. One end of the suction tube 32 is connected to the inlet end of the sampling element 31, and the other end extends into the bottom of the sampling bottle 1. One end of the outlet tube 33 is connected to the outlet end of the sampling element 31. The diversion component includes: a mounting shell 41, a diversion column 42, and multiple diversion tubes 43. The mounting shell 41 is disposed on the sealing cap 2. The diversion column 42 is disposed on the mounting shell 41 and has multiple diversion ports. One end of each diversion tube 43 is connected to a diversion port. The inlet of each infusion component 5 is connected to the other end of a diversion tube 43, and its outlet is suitable for connecting to a testing device.

[0027] Specifically, the sampling bottle 1 has a cavity to hold the sample liquid to be tested, and an external pipeline can be connected to the sampling bottle 1 to deliver the sample liquid to be tested. The sealing cap 2 is recessed at the mouth of the sampling bottle 1 to seal the mouth and prevent leakage of the sample liquid to be tested. In this embodiment, the sample liquid to be tested is transformer oil.

[0028] The sampling component 31 is preferably a liquid pump, which is mounted on the sealing cap 2. One end of the sampling tube 32 is connected to the inlet end of the sampling component 31, and the other end passes through the sealing cap 2 and extends into the bottom of the sampling bottle 1. One end of the outlet tube 33 is connected to the outlet end of the sampling component 31, and the other end is connected to the diversion assembly. The sampling assembly is mainly used to remove the sample liquid to be tested from the sampling bottle 1. After the liquid pump is started, the sample liquid to be tested can be drawn away through the sampling tube 32 and then delivered to the diversion assembly through the outlet tube 33.

[0029] The flow splitting assembly can split the sample liquid being tested, delivered by the outlet tube 33, into multiple streams. Specifically, the mounting housing 41 is disposed on the sealing cover 2 and is used to house the flow splitting column 42 and multiple flow splitting tubes 43. The flow splitting column 42 is located at the center of the mounting housing 41 and has multiple flow splitting ports. Each flow splitting port is connected to a flow splitting tube 43, thus allowing the sample liquid to be tested to be split into multiple testing devices via multiple flow splitting tubes 43, facilitating detection. In this embodiment, six flow splitting tubes 43 are provided, and the corresponding flow splitting column 42 should have six flow splitting ports.

[0030] This multi-channel diversion sampling device can divert the sample liquid to multiple different sampling devices each time it is drawn, which is convenient for the detection of different properties. The sampling process is convenient and fast, which greatly improves the detection efficiency.

[0031] In some embodiments, the sampling bottle 1 is provided with a sampling tube 6 at its mouth, a sealing cap 2 is provided on the sampling tube 6, and the sealing cap 2 and the sampling tube 6 are connected by a positioning mechanism 7.

[0032] A sampling tube 6 is provided at the mouth of the sampling bottle 1. The outer diameter of the sampling tube 6 is smaller than the outer diameter of the sampling bottle 1, and a sampling channel communicating with the bottle mouth is provided in the middle of the sampling tube 6. A sealing cap 2 is provided on the top of the sampling tube 6, and the two are detachably connected by a positioning mechanism 7. Specifically, in this embodiment, two sets of positioning mechanisms 7 are provided on both sides of the sealing cap 2.

[0033] In one embodiment, the positioning mechanism 7 includes: a mounting block 71, a telescopic rod 72, a sliding block 73, a connecting rod 74, and a fixing plate 75. The mounting block 71 is disposed on the sampling tube 6. The fixed end of the telescopic rod 72 is connected to the mounting block 71, and its driving end is connected to the sliding block 73. The telescopic rod 72 is adapted to drive the sliding block 73 to move along the height direction of the sampling bottle 1. One end of the connecting rod 74 is hinged to the sliding block 73, and the other end is provided with a locking block 76. The fixing plate 75 is disposed on the sealing cap 2, and a locking groove is opened on it. The locking block 76 is engaged with the locking groove.

[0034] like Figure 2 As shown, a mounting block 71 is provided on the outer wall of the top of the sampling tube 6, and a telescopic rod 72 is provided at the bottom of the mounting block 71. The telescopic rod 72 can be a hydraulic rod, an electric rod, etc. A sliding block 73 is provided at the bottom end of the telescopic rod 72, which is its driving end. When the telescopic rod 72 extends or retracts, it can drive the sliding block 73 to move up and down. One end of the connecting rod 74 is hinged to the sliding block 73 and can rotate around the hinge point. The other end is provided with a locking block 76. A fixing plate 75 is also provided on the sealing cover 2. The fixing plate 75 has a slot with an opening at the top, and the locking block 76 can be inserted into the slot to engage with it.

[0035] In one embodiment, the positioning mechanism 7 further includes a guide rod 77, which is disposed on the sampling bottle 1, and a sliding block 73 is slidably connected to the guide rod 77.

[0036] The sampling tube 6 has mounting grooves on both sides, and guide rods 77 are installed in the mounting grooves, with the guide rods 77 arranged parallel to the telescopic rod 72. A through hole is provided on the sliding block 73, into which the guide hole is inserted. When the telescopic rod 72 drives the sliding block 73 to move, the sliding block 73 slides axially along the guide rod 77.

[0037] The working process of positioning mechanism 7 is as follows: When connection is required, the telescopic rod 72 drives the sliding block 73 to move upward, and then the connecting rod 74 is rotated to be parallel to the telescopic rod 72, so that the locking block 76 is above the slot. Then the telescopic rod 72 drives the sliding block 73 to move downward, so that the locking block 76 is locked into the slot. At this time, the sealing cover 2 is connected to the sampling tube 6.

[0038] When disassembly is required, the telescopic rod 72 drives the sliding block 73 to move upward, allowing the locking block 76 to disengage from the locking slot. Then, the connecting rod 74 is rotated, and the telescopic rod 72 drives the sliding block 73 to move downward. At this time, the sealing cover 2 can be separated from the sampling tube 6.

[0039] In one embodiment, a second seal 8 is provided between the sealing cap 2 and the sampling tube 6.

[0040] Specifically, both the sealing cap 2 and the sampling bottle 1 have grooves, and the second sealing element 8 is disposed within the grooves. When the sealing cap 2 is connected to the sampling tube 6, it will compress the second sealing element 8 to form a seal. The second sealing element 8 can be a rubber gasket.

[0041] In one embodiment, the infusion assembly 5 includes: a delivery tube 51, a sealing mechanism 52, and a delivery tube 53. The inlet of the delivery tube 51 is connected to the other end of the diversion tube 43. The sealing mechanism 52 is provided inside the delivery tube 51. One end of the delivery tube 53 can be inserted from the outlet of the delivery tube 51. The sealing mechanism 52 has an open state when the delivery tube 53 is inserted into the delivery tube 51 and a sealed state when the delivery tube 53 is pulled out of the delivery tube 51.

[0042] Specifically, the number of transfer tubes 51 corresponds to the number of diversion tubes 43. In this embodiment, six transfer tubes 51 are provided. The transfer tubes 51 are fixedly installed on the outer wall of the mounting shell 41. The two ends of the transfer tubes 51 are respectively provided with inlets and outlets. They have a receiving cavity inside, and the inlet of the transfer tube 51 is connected to the diversion tube 43. The sample liquid to be tested in the diversion tube 43 can enter the transfer tube 51 through the inlet.

[0043] A sealing mechanism 52 is provided inside the transfer tube 51, and the state of the sealing mechanism 52 is controlled by the transfer tube 53. When the transfer tube 53 is inserted into the transfer tube 51, the sealing mechanism 52 is in the open state, and the sample liquid to be tested in the transfer tube 51 can smoothly enter the transfer tube 53. When the transfer tube 53 is pulled out of the transfer tube 51, the sealing mechanism 52 is in the sealed state, and the sample liquid to be tested in the transfer tube 51 cannot flow out from the outlet of the transfer tube 51.

[0044] In one embodiment, the sealing mechanism 52 includes a baffle 521 and an elastic member 522. The baffle 521 is slidably disposed in the conveying pipe 51 and has a plurality of liquid outlet holes 5211. One end of the elastic member 522 is connected to the inner wall of the conveying pipe 51, and the other end is connected to the side of the baffle 521 away from the outlet. A first sealing member 523 is provided on the side of the baffle 521 near the outlet.

[0045] Specifically, the baffle 521 is shaped to match the inner wall of the delivery tube 51. Multiple outlet holes 5211 are circumferentially formed on the baffle 521, allowing the sample liquid to flow from one side of the baffle 521 to the other. A first seal 523 and a third seal 524 are located near the outlet of the baffle 521. The diameter of the third seal 524 is larger than that of the first seal 523, the diameter of the first seal 523 is larger than the outlet diameter, and the diameter of the third seal 524 is equal to the inner diameter of the delivery tube 51. An elastic element 522 is located on the side of the baffle 521 away from the outlet. One end of the elastic element 522 is connected to the inner wall of the delivery tube 51, and the other end is connected to the baffle 521 to provide elastic force. When the delivery tube 53 is inserted into the delivery tube 51 from the outside, it pushes the baffle 521 towards the inlet, compressing the elastic element 522 and accumulating elastic potential energy, allowing the sample liquid to enter the delivery tube 53. When the delivery tube 53 is pulled out of the delivery tube 51, the elastic potential energy stored in the elastic element 522 is released, which will push the baffle 521 to move closer to the outlet until it fits against the side wall of the delivery tube 51. Under the action of the first sealing element 523, the sample liquid to be tested will not leak from the outlet.

[0046] In one embodiment, the end of the delivery pipe 53 inserted into the delivery pipe 51 has an inlet hole 531.

[0047] The delivery pipe 53 is inserted into the transfer pipe 51 at one end, and has multiple inlet holes 531 along its circumference to allow the sample liquid to enter the delivery pipe 53. The other end of the delivery pipe 53 is connected to the testing device, so that the sample liquid can be smoothly delivered to the testing device after entering the delivery pipe 53.

[0048] In one embodiment, an anti-slip sleeve 54 is provided on the outside of the delivery pipe 53.

[0049] The anti-slip cylinder 54 is fitted onto the outside of the conveying pipe 53 to facilitate the handling and operation of the conveying pipe 53 by the staff. Furthermore, a fourth sealing element 56 is provided at one end of the anti-slip cylinder 54 to ensure the sealing of the connection surface between the anti-slip cylinder 54 and the conveying pipe 51 after the conveying pipe 53 is connected to the transmission pipe 51.

[0050] In one embodiment, a positioning sleeve 55 is provided on the outside of the anti-slip cylinder 54, and the positioning sleeve 55 is threadedly connected to the transmission pipe 51.

[0051] The positioning sleeve 55 is provided with internal threads, and the conveying pipe 51 is provided with external threads. The positioning sleeve 55 can be threadedly connected to the conveying pipe 51 to realize the positioning of the conveying pipe 53 and the anti-slip cylinder 54.

[0052] The following describes the operation of the multi-channel shunt sampling device provided in this embodiment: According to the testing requirements, insert an appropriate number of delivery tubes 53 into the delivery tubes 51 and tighten the positioning sleeves 55 to lock them in place. That is, install as many delivery tubes 53 as there are several properties of the sample liquid to be tested, while the delivery tubes 51 without delivery tubes 53 installed remain sealed by the sealing mechanism 52.

[0053] The sample liquid to be tested is supplied into the sampling bottle 1, and then the sampling device 31 is started. The sample liquid to be tested in the sampling bottle 1 is pumped into the split column 42 through the extraction tube 32 and the outlet tube 33. The sample liquid to be tested is split into the corresponding split tube 43 through the split column 42, and then enters the corresponding testing device for detection through the transfer tube 51, the baffle 521, and the delivery tube 53.

[0054] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A multi-channel shunt sampling device, characterized in that, include: A sampling bottle (1) is provided with a sealing cap (2) at the mouth of the sampling bottle (1), and the sampling bottle (1) is suitable for placing the sample liquid to be tested. The extraction assembly includes: a sampling element (31), a liquid extraction tube (32), and a liquid outlet tube (33). The sampling element (31) is disposed on the sealing cap (2). One end of the liquid extraction tube (32) is connected to the liquid inlet end of the sampling element (31), and the other end extends into the bottom of the sampling bottle (1). One end of the liquid outlet tube (33) is connected to the liquid outlet end of the sampling element (31). The diversion assembly includes: a mounting shell (41), a diversion column (42), and a plurality of diversion tubes (43). The mounting shell (41) is disposed on the sealing cover (2). The diversion column (42) is disposed on the mounting shell (41) and has a plurality of diversion ports. One end of each diversion tube (43) is connected to one of the diversion ports. Infusion assembly (5), the inlet of each infusion assembly (5) is connected to the other end of one of the diversion tubes (43), and its outlet is adapted to be connected to a sample measuring device.

2. The multi-channel shunt sampling device according to claim 1, characterized in that, The infusion assembly (5) includes: a delivery tube (51), a sealing mechanism (52), and a delivery tube (53). The inlet of the delivery tube (51) is connected to the other end of the diversion tube (43). The sealing mechanism (52) is provided inside the delivery tube (51). One end of the delivery tube (53) can be inserted from the outlet of the delivery tube (51). The sealing mechanism (52) has an open state when the delivery tube (53) is inserted into the delivery tube (51) and a sealed state when the delivery tube (53) is pulled out of the delivery tube (51).

3. The multi-channel shunt sampling device according to claim 2, characterized in that, The sealing mechanism (52) includes a baffle (521) and an elastic element (522). The baffle (521) is slidably disposed in the conveying pipe (51) and has a plurality of liquid outlet holes (5211) thereon. One end of the elastic element (522) is connected to the inner wall of the conveying pipe (51) and the other end is connected to the side of the baffle (521) away from the outlet. A first sealing element (523) is provided on the side of the baffle (521) near the outlet.

4. The multi-channel shunt sampling device according to claim 3, characterized in that, The end of the delivery pipe (53) inserted into the transmission pipe (51) has an inlet hole (531).

5. The multi-channel shunt sampling device according to claim 2, characterized in that, An anti-slip sleeve (54) is provided on the outside of the conveying pipe (53).

6. The multi-channel shunt sampling device according to claim 5, characterized in that, A positioning sleeve (55) is provided on the outside of the anti-slip cylinder (54), and the positioning sleeve (55) is threadedly connected to the transmission pipe (51).

7. The multi-channel shunt sampling device according to claim 1, characterized in that, The sampling bottle (1) has a sampling tube (6) at its mouth, and a sealing cap (2) is placed on the sampling tube (6). The sealing cap (2) and the sampling tube (6) are connected by a positioning mechanism (7).

8. The multi-channel shunt sampling device according to claim 7, characterized in that, The positioning mechanism (7) includes: a mounting block (71), a telescopic rod (72), a sliding block (73), a connecting rod (74), and a fixing plate (75). The mounting block (71) is disposed on the sampling tube (6). The fixed end of the telescopic rod (72) is connected to the mounting block (71), and its driving end is connected to the sliding block (73). The telescopic rod (72) is adapted to drive the sliding block (73) to move along the height direction of the sampling bottle (1). One end of the connecting rod (74) is hinged to the sliding block (73), and the other end is provided with a locking block (76). The fixing plate (75) is disposed on the sealing cover (2), and a locking groove is provided thereon. The locking block (76) is engaged with the locking groove.

9. The multi-channel shunt sampling device according to claim 8, characterized in that, The positioning mechanism (7) further includes a guide rod (77), which is disposed on the sampling bottle (1), and the sliding block (73) is slidably connected to the guide rod (77).

10. The multi-channel shunt sampling device according to claim 7, characterized in that, A second sealing element (8) is provided between the sealing cap (2) and the sampling tube (6).

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