Clamp transfer device

Abstract

The utility model relates to the technical field of graphene cleaning, and discloses a clamp transfer device which comprises a first clamping plate, a second clamping plate and a third clamping plate. The second clamping plate is provided with a second circulation hole for the solution to flow out, the second circulation hole is communicated with the first circulation hole, and a fixing structure for fixing the graphene chip in the second circulation hole is arranged between the second clamping plate and the first clamping plate; when the first clamping plate and the second clamping plate are closed in a covering mode, the connecting assembly is connected with the first clamping plate and the second clamping plate in a sealed mode. The device has the technical effects of protecting the integrity of the surface of the graphene chip and improving the efficiency of operations such as acid pickling and incubation of the graphene chip.

Description

Technical Field

[0001] The utility model belongs to the technical field of graphene cleaning, and particularly relates to a clamp transfer device. Background Art

[0002] Graphene chips usually need to undergo acid washing and incubation to change the electrode properties, and then the flux of the graphene chip is detected through electrochemical testing.

[0003] Currently, during operations such as pickling and incubation of graphene chips, operators use tweezers to pick up the graphene chip and transfer it to different solutions for immersion. The graphene chip undergoes a series of treatments, including pickling, cleaning, activation, and protein antibody attachment. Operators need to pick up the graphene chip multiple times to transfer it to different solutions for immersion or transfer it to electrochemical testing equipment for testing.

[0004] However, when the graphene chip is clamped multiple times with tweezers, the surface of the graphene chip is easily damaged. At the same time, the efficiency of operations such as acid washing and incubation of the graphene chip is affected. Utility Model Content

[0005] In order to address the deficiencies of the prior art, the utility model provides a clamp transfer device, which fixes the graphene chip through a fixed structure, and the first clamp and the second clamp cover are combined to pass through different solutions in sequence. The graphene chip can be pickled and incubated without multiple transfers, thereby improving the processing efficiency and reducing the degree of damage to the surface of the graphene chip.

[0006] The technical effects to be achieved by the present invention are achieved through the following technical aspects:

[0007] The utility model provides a clamp transfer device, comprising a first clamping plate, which is provided with a first flow hole for solution to flow in; a second clamping plate, which is provided with a second flow hole for solution to flow out, the second flow hole is connected to the first flow hole, and a fixing structure for fixing the graphene chip in the second flow hole is provided between the second clamping plate and the first clamping plate; and a connecting component, which seals and connects the first clamping plate and the second clamping plate when the first clamping plate and the second clamping plate are covered.

[0008] In some implementations, the fixing structure includes a carrier net disposed in the second flow hole, the carrier net being used to place the graphene chip; and a spring sheet disposed on the first clamping plate, the spring sheet pressing and fixing the graphene chip on the carrier net.

[0009] In some implementations, the fixing structure further includes a fixing seat, which is disposed in the second flow hole. A placement hole adapted for the graphene chip is provided on the fixing seat, and the carrier mesh is disposed in the placement hole.

[0010] In some implementations, a first flow tube is provided on the first splint, and the first flow tube is connected to the first splint at the first flow hole; a second flow tube is provided on the second splint, and the second flow tube is connected to the second splint at the second flow hole, and the solution flows through the first flow tube, the first splint, the second splint and the second flow tube in sequence.

[0011] In some implementations, a first insulating member for limiting air circulation in the first circulation tube is provided at the first circulation tube; and a second insulating member for limiting air circulation in the second circulation tube is provided at the second circulation tube.

[0012] In some implementations, the first insulating member includes a first clamping block and a second clamping block for cooperating to clamp the first circulation tube, and a driving assembly is provided between the first clamping block and the second clamping block, and the driving assembly drives the first clamping block and the second clamping block to move closer to or away from each other to clamp or loosen the first circulation tube.

[0013] In some implementations, the drive assembly includes a support seat; a screw rod, which is passed through the support seat and rotatably connected to the support seat, and the screw rod is provided with a first thread and a second thread in opposite directions, the first clamping block is threadedly connected to the screw rod at the first thread, and the second clamping block is threadedly connected to the screw rod at the second thread; and a guide rail, which is provided on the support seat, and the first clamping block and the second clamping block are respectively slidably connected to the guide rail.

[0014] In some implementations, the second insulating member includes a one-way valve disposed in the second flow tube, and the one-way valve restricts air from flowing into the second flow hole through the second flow tube.

[0015] In some implementations, the connecting assembly includes a first magnetic member and a second magnetic member that attract each other, wherein the first magnetic member is disposed on the first clamping plate, and the second magnetic member is disposed on the second clamping plate.

[0016] In some implementations, a conductive plate is provided on the second clamping plate. The conductive plate passes through an end portion of the second clamping plate and extends into the second flow hole. The conductive plate is in contact with the graphene chip.

[0017] In summary, the present invention has at least the following advantages:

[0018] The fixture transfer device provided by the utility model secures the graphene chip within the second flow hole via a fixed structure, covers the first and second clamping plates, and seals the first and second clamping plates together with a connecting assembly. When a solution is used to rinse the graphene chip, different solutions can flow sequentially along the first flow hole into the first clamping plate and continue to flow to the fixed structure. The solution rinses the graphene chip secured by the fixed structure, and the rinsed solution is then discharged from the second clamping plate via the second flow hole. A graphene chip rinsing space for introducing different solutions is formed within the first and second flow holes. This eliminates the need for operators to repeatedly pick up and transfer the graphene chip during operations such as pickling or incubation, thereby protecting the integrity of the graphene chip surface and improving the efficiency of operations such as pickling and incubation of the graphene chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of a fixture transfer device according to a specific embodiment of the present invention.

[0020] Figure 2 It is a top view of the second splint according to a specific embodiment of the present invention.

[0021] Figure 3 This is a front view of a fixture transfer device according to a specific embodiment of the present invention.

[0022] Figure 4 It is a front view of the first insulating member and the second insulating member of a specific embodiment of the present utility model.

[0023] Figure 5 It is a front view of a screw rod according to a specific embodiment of the present invention.

[0024] Figure 6 This is a cross-sectional view of a clamp transfer device according to Example 3 of the present utility model.

[0025] Markings in the figure:

[0026] 1. First clamping plate; 11. First circulation hole; 12. First circulation tube; 13. Temperature control chip;

[0027] 2. Second clamping plate; 21. Second circulation hole; 22. Fixing structure; 221. Carrying net; 222. Spring piece; 223. Fixing seat; 224. Placement hole; 23. Second circulation tube; 24. Mounting slot; 25. Conductive plate;

[0028] 3. Connecting assembly; 31. First magnetic attraction member; 32. Second magnetic attraction member;

[0029] 4. First insulating member; 41. First clamping block; 42. Second clamping block; 43. Drive assembly; 431. Support seat; 432. Screw; 4321. First thread; 4322. Second thread; 433. Guide rail;

[0030] 5. Second insulating member; 51. One-way valve. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1:

[0034] Please see the attached Figure 1 The clamp transfer device of the utility model includes a first clamping plate 1 and a second clamping plate 2. A connecting component 3 is provided between the first clamping plate 1 and the second clamping plate 2. It can be used in operations such as material cleaning or solution immersion, especially in pickling and incubation of graphene chips. It is easy to operate and is conducive to ensuring the integrity of the graphene chip surface.

[0035] The first clamping plate 1 and the second clamping plate 2 can be arranged vertically and overlap each other, wherein the first clamping plate 1 is provided with a first flow hole 11, specifically, a vertically arranged circular hole, and the second clamping plate 2 is provided with a second flow hole 21, specifically, a vertically arranged circular hole, which is connected to the first flow hole 11 to allow the solution to flow through the first flow hole 11 and the second flow hole 21. Furthermore, a plurality of first flow holes 11 and second flow holes 21 can be provided respectively to increase the number of graphene chips that can be processed, thereby improving efficiency.

[0036] A fixing structure 22 for fixing the graphene chip in the second flow hole 21 is provided between the first clamping plate 1 and the second clamping plate 2. When the first clamping plate 1 and the second clamping plate 2 are covered, the solution flows into the first flow hole 11 to rinse the graphene chip fixed by the fixing structure 22, and the solution after rinsing the graphene chip flows out from the second flow hole 21.

[0037] A connecting component 3 is provided between the first splint 1 and the second splint 2. The connecting component 3 can seal and connect the first splint 1 and the second splint 2. As shown in some specific embodiments, the connecting component 3 includes a first magnetic member 31 and a second magnetic member 32 that attract each other. Specifically, the first magnetic member 31 and the second magnetic member 32 are preferably, but not limited to, magnets. The first magnetic member 31 is provided on the side of the first splint 1 close to the second splint 2. A mounting groove 24 is provided on the second splint 2. The mounting groove 24 is adapted to the first magnetic member 31 and is arranged opposite to the first magnetic member 31. The second magnetic member 32 is arranged in the mounting groove 24. When the first splint 1 and the second splint 2 are covered, the first magnetic member 31 is embedded in the mounting groove 24 and attracts each other with the second magnetic member 32, so as to realize the quick disassembly and assembly of the first splint 1 and the second splint 2, and the operation is convenient.

[0038] Specifically, the connecting assembly 3 includes a seal, a sealing groove is provided on the first plywood 1, and a sealing ring is provided on the second plywood 2. The sealing ring is interference fit with the sealing groove, and the sealing ring is arranged around the outside of the second circulation hole 21 to achieve a sealed connection between the first plywood 1 and the second plywood 2. Furthermore, the sealing ring can be made of acid-resistant material, such as a silicone sealing ring.

[0039] During the incubation process of the graphene chip, the graphene chip is first placed in the second circulation hole 21 and fixed by the fixed structure 22. The first splint 1 and the second splint 2 are covered, the first magnetic part 31 and the second magnetic part 32 attract each other, and the first splint 1 and the second splint 2 are assembled. First, the pickling solution is introduced into the first circulation hole 11, and the pickling solution flows along the first circulation hole 11 to the second circulation hole 21, and the graphene chip at the fixed structure 22 is cleaned. The pickling solution flushes the graphene chip and flows out from the outlet of the second circulation hole 21. After the pickling is completed, the first splint 1 and the second splint 2 are separated, and the graphene chip is left to dry. The first splint 1 and the second splint 2 are covered again, and the solution required for incubation flows into the first circulation hole 11. The solution also flows through the first circulation hole 11 and the second circulation hole 21 to incubate the graphene chip. After the incubation is completed, the above-mentioned pickling and drying process needs to be repeated again, and the graphene chip completes the pickling and incubation process. It is understandable that those skilled in the art can adjust the type and dosage of different solutions according to actual needs, and the operation is flexible.

[0040] Compared to manually gripping a graphene chip with tweezers, manual gripping makes it difficult to control the gripping force, which can easily damage the graphene chip. Furthermore, multiple gripping and transfers of the graphene chip to different solutions can cause more severe damage to its surface. The first clamping plate 1 and the second clamping plate 2 can circulate different solutions to eliminate the tedious steps of transferring the graphene chip, improving efficiency and reducing the operating time of the entire process. Furthermore, there is no need to remove the graphene chip from the fixing structure 22, which protects the surface of the graphene chip and reduces damage to the surface of the graphene chip caused by frequent gripping.

[0041] Example 2:

[0042] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the fixing structure 22 of the utility model. Figure 1 and Figure 2 .

[0043] The fixing structure 22 of this embodiment includes a carrier mesh 221 for placing the graphene chip. The carrier mesh 221 is disposed within the second circulation hole 21, and the solution can pass through the carrier mesh 221 to circulate within the second circulation hole 21. The first clamping plate 1 is provided with a spring 222 on the wall of the first circulation hole 11. The spring 222 presses and fixes the graphene chip on the carrier mesh 221. Specifically, the first spring 222 can be hook-shaped and made of acid-resistant material to ensure the positioning of the graphene chip.

[0044] As shown in some specific embodiments, a fixing seat 223 is provided in the second flow hole 21, and the fixing seat 223 can be installed on the hole wall of the second flow hole 21. A placement hole 224 is provided on the fixing seat 223. Specifically, the placement hole 224 is adapted to the graphene chip, and the carrier net 221 is provided in the placement hole 224, so that when the graphene chip is placed on the carrier net 221, the fixing seat 223 limits the random movement of the graphene chip at the placement hole 224, and the graphene chip can fully contact with the solution to facilitate the reaction, thereby ensuring the flushing effect of the solution.

[0045] Open the first clamping plate 1, place the graphene chip on the carrier net 221, and then cover the first clamping plate 1 and the second clamping plate 2. The first clamping plate 1 and the second clamping plate 2 are connected by the connecting component 3. The spring piece 222 can press on the graphene chip to fix the graphene chip.

[0046] Example 3:

[0047] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the first splint 1 and the second splint 2 of the utility model. Figures 3 to 6 .

[0048] See Figure 3 and Figure 4 In this embodiment, a first flow tube 12 is provided on the first clamping plate 1. Specifically, the first flow tube 12 can be an acid-resistant hose. The first flow tube 12 is connected to the first clamping plate 1 at the first flow hole 11. When incubating the graphene chip, different solutions flow into the first flow hole 11 through the first flow tube 12.

[0049] A second flow tube 23 is provided on the second splint 2, and the second flow tube 23 is connected to the second splint 2 at the second flow hole 21. The solution flows through the first flow tube 12, the first flow hole 11, the second flow hole 21 and the second flow tube 23 in sequence, forming a flow path for flushing the graphene chip between the first splint 1 and the second splint 2.

[0050] Specifically, during the pickling process, the first circulation tube 12 can be externally connected to the infusion tube of the pickling device, and the second circulation tube 23 can be externally connected to the drainage tube of the pickling device. The pickling liquid flows through the first circulation tube 12, the first circulation hole 11, the second circulation hole 21, and the second circulation tube 23 in sequence to pickle the graphene chip. During the incubation process, the first circulation tube 12 can be externally connected to the infusion tube of the incubation device, and the second circulation tube 23 can be externally connected to the drainage tube of the incubation device. The incubation solution flows through the first circulation tube 12, the first circulation hole 11, the second circulation hole 21, and the second circulation tube 23 in sequence to incubate the graphene chip. The graphene chip does not need to be transferred multiple times between different external devices, and the operation is efficient and convenient. The clamp transfer device of the utility model is externally connected to different devices to pass different solutions, which can reduce the exposure time of the graphene chip to the air, thereby reducing the impact of multiple clamping and transfer operations on the performance of the graphene chip.

[0051] In a preferred embodiment, a conductive plate 25 is provided on the second clamping plate 2. The conductive plate 25 is inserted into the second clamping plate 2. A guide plate extends through the end of the second clamping plate 2 and into the second flow hole 21. The conductive plate 25 contacts the graphene chip so that during electrochemical testing, the conductive plate 25 and the graphene chip are electrically connected. When the graphene chip completes the pickling and incubation treatment, the first flow tube 12 is passed through the electrolyte, the first flow tube 12 and the second flow tube 23 are sealed, and the graphene chip is immersed in the electrolyte. After the guide plate and the graphene chip are electrically connected, high-throughput testing of the graphene chip can be performed. During electrochemical testing, the graphene chips do not need to be removed from the pickling solution and placed in the electrolyte one by one, which can reduce operational errors and further improve efficiency.

[0052] In a preferred embodiment, a first insulating member 4 for limiting air circulation in the first circulation tube 12 is provided at the first circulation tube 12 , and a second insulating member 5 for limiting air circulation in the second circulation tube 23 is provided at the second circulation tube 23 .

[0053] In a preferred embodiment, the first insulating member 4 includes a first clamping block 41 and a second clamping block 42 that cooperate to clamp the first circulation tube 12. A driving assembly 43 is provided between the first clamping block 41 and the second clamping block 42. The driving assembly 43 drives the first clamping block 41 and the second clamping block 42 to move closer to or away from each other to clamp or loosen the first circulation tube 12.

[0054] In some specific embodiments shown, the driving assembly 43 includes a support seat 431, which is arranged on the first clamping plate 1. Figure 5 The support seat 431 is provided with a screw 432. The screw 432 is specifically arranged horizontally and is rotatably connected to the support seat 431. Specifically, a screw head is provided at one end of the screw 432 along the axial direction. By rotating the screw head, the screw 432 is driven to rotate, which facilitates the rotation operation of the screw 432. The screw 432 is provided with a first thread 4321 and a second thread 4322 in opposite directions. Specifically, the first thread 4321 and the second thread 4322 are distributed along the axial direction of the screw 432. The first clamping block 41 is threadedly connected to the screw 432 at the first thread 4321, and the second clamping block 42 is threadedly connected to the screw 432 at the second thread 4322. The support seat 431 is provided with a guide rail 433. Specifically, the guide rail 433 is arranged parallel to the screw 432. The first clamping block 41 and the second clamping block 42 are respectively slidably connected to the guide rail 433. The guide rail 433 can guide the movement of the first clamping block 41 and the second clamping block 42, respectively.

[0055] See Figure 4 and Figure 6 In a preferred embodiment, the second insulating member 5 includes a one-way valve 51 . Specifically, the one-way valve 51 is an acid-resistant valve. The one-way valve 51 can limit air from flowing into the second flow hole 21 through the second flow tube 23 .

[0056] Before the solution is introduced into the first circulation tube 12, the screw 432 is rotated, and the screw 432 drives the first clamp 41 and the second clamp 42 to approach each other along the guide rail 433. The first clamp 41 and the second clamp 42 clamp the first circulation tube 12, and the first circulation tube 12 is in a closed state. When the solution needs to be introduced, the screw 432 rotates in the opposite direction, and the first clamp 41 and the second clamp 42 move away from each other. The first circulation tube 12 is in a flow state, and both the solution and air can flow. During the electrochemical test, the electrolyte is introduced through the first circulation tube 12, and the screw 432 is rotated, and the screw 432 drives the first clamp 41 and the second clamp 42 to clamp the first circulation tube 12. The conductive plate 25 is connected to the graphene chip to perform the electrochemical test.

[0057] The arrangement of the first insulating member 4 and the second insulating member 5 forms a closed space within the first clamping plate 1 and the second clamping plate 2, thereby reducing the contact time between the graphene chip and the air during the solution replacement process, reducing the impact of external factors on the test results of the graphene chip, improving the stability and accuracy of the test results, and at the same time, providing a closed chamber for electrochemical testing of the graphene chip.

[0058] See Figure 6 In other preferred embodiments, the first isolation member 4 may include a one-way valve 51, and the second isolation member 5 includes a first clamping block 41, a second clamping plate 2 and a drive assembly 43. A relatively closed space can also be formed in the first clamping plate 1 and the second clamping plate 2.

[0059] See Figure 1 In a preferred embodiment, a temperature control chip 13 is provided on the first clamping plate 1 for regulating and controlling the solution temperature. This maintains the graphene chip in a constant temperature environment, thereby ensuring its stability and improving the accuracy of electrochemical testing. Specifically, the temperature control chip 13 may be provided with a temperature actuator in contact with the solution. The method for regulating the temperature by the temperature control chip 13 is well known and feasible to those skilled in the art and is not described in detail in this embodiment.

[0060] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0061] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0062] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0063] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. A fixture transfer device, characterized in that: include The first clamping plate (1) is provided with a first flow hole (11) for the solution to flow in; A second clamping plate (2) is provided with a second flow hole (21) for solution outflow, the second flow hole (21) is connected to the first flow hole (11), and a fixing structure (22) for fixing the graphene chip in the second flow hole (21) is provided between the second clamping plate (2) and the first clamping plate (1); and A connecting assembly (3) is provided, wherein when the first splint (1) and the second splint (2) are covered, the connecting assembly (3) seals and connects the first splint (1) and the second splint (2).

2. The fixture transfer device according to claim 1, characterized in that: The fixing structure (22) includes a carrier net (221), disposed in the second flow hole (21), the carrier net (221) being used for placing the graphene chip; and A spring piece (222) is provided on the first clamping plate (1), and the spring piece (222) presses and fixes the graphene chip on the carrier net (221).

3. The fixture transfer device according to claim 2, characterized in that: The fixing structure (22) further comprises a fixing seat (223), the fixing seat (223) being arranged in the second circulation hole (21), the fixing seat (223) being provided with a placement hole (224) adapted to the graphene chip, and the carrying net (221) being arranged in the placement hole (224).

4. The fixture transfer device according to claim 1, characterized in that: A first flow tube (12) is provided on the first clamping plate (1), and the first flow tube (12) is connected to the first clamping plate (1) at the first flow hole (11); A second flow tube (23) is provided on the second splint (2), and the second flow tube (23) is connected to the second splint (2) at the second flow hole (21), and the solution flows through the first flow tube (12), the first splint (1), the second splint (2) and the second flow tube (23) in sequence.

5. The fixture transfer device according to claim 4, characterized in that: The first circulation pipe (12) is provided with a first insulating member (4) for limiting the circulation of air in the first circulation pipe (12); The second circulation pipe (23) is provided with a second insulating member (5) for limiting the circulation of air in the second circulation pipe (23).

6. The fixture transfer device according to claim 5, characterized in that: The first insulating member (4) comprises a first clamping block (41) and a second clamping block (42) for cooperating to clamp the first circulation tube (12); a driving assembly (43) is provided between the first clamping block (41) and the second clamping block (42); the driving assembly (43) drives the first clamping block (41) and the second clamping block (42) to move closer to or away from each other, so as to clamp or loosen the first circulation tube (12).

7. The fixture transfer device according to claim 6, characterized in that: The drive assembly (43) includes Support seat (431); a screw (432) passing through the support seat (431) and rotatably connected to the support seat (431); a first thread (4321) and a second thread (4322) in opposite directions are provided on the screw (432); the first clamping block (41) is threadedly connected to the screw (432) at the first thread (4321); and the second clamping block (42) is threadedly connected to the screw (432) at the second thread (4322); and The guide rail (433) is provided on the support seat (431), and the first clamping block (41) and the second clamping block (42) are respectively slidably connected to the guide rail (433).

8. The fixture transfer device according to claim 5, characterized in that: The second insulating member (5) includes a one-way valve (51), which is arranged in the second circulation tube (23). The one-way valve (51) limits air from flowing into the second circulation hole (21) through the second circulation tube (23).

9. The fixture transfer device according to claim 1, characterized in that: The connecting assembly (3) comprises a first magnetic member (31) and a second magnetic member (32) that attract each other, wherein the first magnetic member (31) is arranged on the first clamping plate (1), and the second magnetic member (32) is arranged on the second clamping plate (2).

10. The fixture transfer device according to claim 1, wherein: A conductive plate (25) is provided on the second clamping plate (2), the conductive plate (25) passes through the end of the second clamping plate (2) and extends into the second flow hole (21), and the conductive plate (25) is in contact with the graphene chip.

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