Jacking structure and spent fuel storage grillwork

Abstract

The utility model relates to the technical field of spent fuel storage, and discloses a jacking structure and a spent fuel storage grillwork. The jacking unit comprises an air cylinder, a first rotating rod rotating at the telescopic end of the air cylinder, a second rotating rod movably arranged on the outer ring of the first rotating rod in a sleeving mode, a third rotating rod movably arranged on the outer ring of the second rotating rod in a sleeving mode and a pushing block fixed to the outer ring of the first rotating rod, the outer ring of the second rotating rod and the outer ring of the third rotating rod. The device has the beneficial effects that the cylinder, the first rotating rod, the second rotating rod, the third rotating rod, the push block and the limiting component are matched with one another, so that a plurality of adjacent accommodating boxes can be taken out or the accommodating boxes and the sample boxes can be taken out independently when needed, the access stability can be ensured, and the condition of material leakage is avoided; and through staggered arrangement of the containing boxes and the sample boxes, it can be effectively guaranteed that neutrons released in the spent fuel are absorbed, and safe storage of the spent fuel is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of spent fuel storage, in particular to a jacking structure and a spent fuel storage grid. Background Art

[0002] Nuclear fuel assemblies become spent fuel assemblies after being irradiated in the reactor. After reaching a certain burnup depth, the spent fuel assemblies need to be unloaded from the core and stored in the spent fuel storage grids in the nuclear power plant. Currently, most nuclear power plants use dense storage methods, but when the spent fuel assemblies are close to each other, the neutrons released by the spent fuel may reach a certain concentration and cause a critical accident of the spent fuel, and the stored spent fuel and neutron absorbing materials need to be placed and taken out regularly.

[0003] In the prior art, when taking out a holding box and a sample box, adjacent holding boxes cannot be taken out at once, and the existing storage racks cannot maintain the subcritical state of the spent fuel. Utility Model Content

[0004] Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] The utility model aims to provide a lifting structure, which can solve the problem that when taking out a containing box and a sample box, adjacent containing boxes cannot be taken out at one time.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a lifting structure, which includes a lifting unit, the lifting unit includes a cylinder, a first rotating rod rotated on the telescopic end of the cylinder, a second rotating rod movably sleeved on the outer ring of the first rotating rod, a third rotating rod movably sleeved on the outer ring of the second rotating rod, a push block fixed to the outer rings of the first rotating rod, the second rotating rod and the third rotating rod, and a limit assembly arranged above the cylinder.

[0007] As a preferred solution of the jacking structure of the utility model, wherein: the telescopic end of the cylinder is fixedly connected to a fixed cylinder, the first rotating rod is rotatably arranged at the center of the telescopic end of the cylinder, and the limiting assembly is fixed to the outer ring of the fixed cylinder.

[0008] As a preferred solution of the jacking structure described in the utility model, wherein: a first annular groove is provided on the outer circle of one end of the first rotating rod, two first short grooves and two first long grooves are symmetrically provided on one side of the first annular groove, the length of the first long groove is longer than that of the first short groove, and the push block is fixed to the other end of the first rotating rod.

[0009] As a preferred scheme of the jacking structure described in the utility model, the outer ring of the second rotating rod is provided with a second annular groove, one side of the second annular groove is symmetrically provided with two second short grooves and two second long grooves, one end of the second rotating rod is fixedly connected with a first handle, the inner ring of the second rotating rod is symmetrically fixedly connected with two first fixed blocks that slide in cooperation with the first short groove and the first long groove, and one end of the second rotating rod is provided with a first placement groove.

[0010] As a preferred solution of the jacking structure described in the utility model, one end of the third rotating rod is fixedly connected to a second handle, the other end of the third rotating rod is provided with two second placement grooves, the inner ring of the third rotating rod is symmetrically fixedly connected to two second fixed blocks, and the second fixed blocks are slidably matched with the first annular groove, the first short groove, and the first long groove.

[0011] As a preferred solution of the jacking structure described in the utility model, the limiting assembly includes a placing cylinder fixed on a fixed cylinder, two arc-shaped plates fixed to the outer ring of the placing cylinder, a movable rod sliding on the inner ring of the placing cylinder, and a spring arranged inside the placing cylinder, the outer ring of the movable rod is fixedly connected to a baffle, the two ends of the spring are respectively fixed to one side of the baffle and the inner wall of the placing cylinder, and one end of the movable rod is fixedly connected to a clamping block.

[0012] As a preferred solution of the jacking structure of the utility model, a groove is provided on one side of the push block, the groove is matched with one end of the placement tube located on the inner circle of the fixed tube, and the push block is matched with the first placement groove and the two second placement grooves.

[0013] The beneficial effects of the utility model: the utility model can take out multiple adjacent containing boxes or take out the containing boxes and sample boxes separately when needed through the mutual cooperation between the cylinder, the first rotating rod, the second rotating rod, the third rotating rod, the push block and the limit assembly, which can ensure the stability of storage and access and avoid material leakage.

[0014] The utility model aims to provide a spent fuel storage grid, which can solve the problem that the storage grid cannot maintain the subcritical state of the spent fuel.

[0015] In order to solve the above technical problems, the utility model provides the following technical solutions: a spent fuel storage grid, which includes a bearing unit, the bearing unit includes a bearing assembly, an outer cylinder and a top cover arranged on the top of the bearing assembly, and a containing box and a connecting plate arranged in the bearing assembly, and the lifting unit is installed on the central axis of the lifting unit.

[0016] As a preferred solution of the spent fuel storage grid of the utility model, the bearing assembly includes a base, a mounting tube fixed to the top of the base, and a placement box fixed to the top of the mounting tube, a connecting tube is fixedly connected to the interior of the placement box, a through groove is provided on the connecting tube, the through groove is slidably matched with the placement tube, the inner ring and the outer ring of the connecting tube are slidably matched with two arc plates respectively, and the cylinder is installed in the mounting tube.

[0017] As a preferred solution of the spent fuel storage grid of the utility model, the containing box is arranged in the space between the connecting tube and the placing box, a card slot is provided on the side of the containing box close to the connecting tube, the card slot cooperates with the card block, a sample box is installed on the connecting plate, and the sample box and the containing box are placed alternately.

[0018] The beneficial effects of the utility model are as follows: the utility model can effectively ensure the absorption of neutrons released from the spent fuel through the staggered arrangement of the containing box and the sample box, and maintain the subcritical state of the spent fuel pool by monitoring the degradation and change trend of the neutron absorbing material, thereby effectively ensuring the safe storage of the spent fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0020] Figure 1 It is a structural schematic diagram of the jacking structure.

[0021] Figure 2 Schematic diagram of the structure of the first rotating rod.

[0022] Figure 3 It is a schematic cross-sectional structural diagram of the second rotating rod.

[0023] Figure 4 It is a schematic cross-sectional structural diagram of the third rotating rod.

[0024] Figure 5 It is a schematic diagram of the structure of the limit component.

[0025] Figure 6 Schematic diagram of the explosion structure of the spent fuel storage grid.

[0026] Figure 7 This is a schematic diagram of the cross-sectional structure of the spent fuel storage grid.

[0027] Figure 8It is a partial cross-sectional structural schematic diagram of the fuel storage grid. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1

[0032] Reference Figure 1 , is the first embodiment of the utility model, which provides a jacking structure, which includes a jacking unit 100, the jacking unit 100 includes a cylinder 101, a first rotating rod 102 rotated on the telescopic end of the cylinder 101, a second rotating rod 103 movably mounted on the outer ring of the first rotating rod 102, a third rotating rod 104 movably mounted on the outer ring of the second rotating rod 103, a push block 105 fixed to the outer rings of the first rotating rod 102, the second rotating rod 103 and the third rotating rod 104, and a limiting assembly 106 arranged above the cylinder 101.

[0033] When in use, the cylinder 101 can provide power for the lifting of the storage box 204 and the connecting plate 205. The cooperation between the push block 105 and the limit assembly 106 can realize the removal and storage of the storage box 204. The position of the push block 105 can be adjusted through the coordination and adjustment between the first rotating rod 102, the second rotating rod 103 and the third rotating rod 104, so that multiple adjacent storage boxes 204 can be taken out at the same time, which is convenient for use and can also ensure the stability of the materials that have not been taken out to prevent them from leaking.

[0034] Example 2

[0035] Reference Figure 1 to Figure 5, which is the second embodiment of the utility model, and is different from the first embodiment in that: it also includes a cylinder 101 whose telescopic end is fixedly connected to a fixed cylinder 101a, a first rotating rod 102 is rotatably arranged at the center of the telescopic end of the cylinder 101, and a limiting assembly 106 is fixed to the outer ring of the fixed cylinder 101a. The cylinder 101 provides the device with lifting power, and the fixed cylinder 101a can ensure the stability of the limiting assembly 106, so as to facilitate the removal of materials.

[0036] Specifically, a first annular groove 102a is formed on the outer circle of one end of the first rotating rod 102, and two first short grooves 102b and two first long grooves 102c are symmetrically formed on one side of the first annular groove 102a. The length of the first long groove 102c is longer than that of the first short groove 102b. The push block 105 is fixed to the other end of the first rotating rod 102.

[0037] Furthermore, the outer ring of the second rotating rod 103 is provided with a second annular groove 103a, and two second short grooves 103b and two second long grooves 103c are symmetrically provided on one side of the second annular groove 103a, one end of the second rotating rod 103 is fixedly connected with a first handle 103d, and the inner ring of the second rotating rod 103 is symmetrically fixedly connected with two first fixed blocks 103f that are slidably matched with the first short groove 102b and the first long groove 102c, and one end of the second rotating rod 103 is provided with a first placement groove 103e.

[0038] Furthermore, one end of the third rotating rod 104 is fixedly connected to the second handle 104a, the other end of the third rotating rod 104 is provided with two second placement grooves 104b, the inner circle of the third rotating rod 104 is symmetrically fixedly connected to two second fixed blocks 104c, and the second fixed blocks 104c are slidably matched with the first annular groove 102a, the first short groove 102b, and the first long groove 102c.

[0039] The angles between the first short slot 102b and the first long slot 102c, the second short slot 103b and the second long slot 103c are calculated in the counterclockwise direction, and the angles formed therebetween can be set according to the number of storage boxes 204 in the placement box 201c, the number of push blocks 105 and actual usage, but cannot affect the normal operation of the device. For example, there are three push blocks 105, and at this time, the positions of the three push blocks 105 need to be controlled by the first rotating rod 102, the second rotating rod 103 and the third rotating rod 104. When each push block 105 cooperates with the storage box 204, the angles between the three push blocks 105 are all 120 degrees. At this time, the distance from the first short slot 102b to the first long slot 102c and the distance from the second short slot 103b to the second long slot 103c is also 120 degrees when calculated counterclockwise.

[0040] The angle of the push block 105 on the second rotating rod 103 to the first placement groove 103e is 102 degrees when calculated counterclockwise, in order to match the angle of the first fixed block 103f rotating from the first short groove 102b to the first long groove 102c, and after the rotation, the first fixed block 103f slides down along the first long groove 102c, and the push block 105 on the first rotating rod 102 will be located in the first placement groove 103e. Similarly, when the third rotating rod 104 is rotated 120 degrees counterclockwise, the two second placement grooves 104b are respectively matched with the push blocks 105 on the first rotating rod 102 and the second rotating rod 103.

[0041] The first handle 103d is located above the second handle 104a, so that the second rotating rod 103 and the third rotating rod 104 can be operated separately, which is convenient for the use of the device and ensures the normal operation of the device. Through the limiting effect of the first short groove 102b and the first long groove 102c, the second short groove 103b and the second long groove 103c and the first fixed block 103f and the second fixed block 104c respectively, when the second handle 104a is rotated, the second rotating rod 103 and the first rotating rod 102 can be driven to rotate at the same time. Because there is a certain friction in the rotation connection between the first rotating rod 102 and the telescopic end of the cylinder 101, when the second rotating rod 103 and the third rotating rod 104 are rotated to adjust the positions of the two push blocks 105, the first rotating rod 102 will remain stable accordingly, which is convenient for operation.

[0042] Specifically, the limiting assembly 106 includes a placing cylinder 106a fixed on the fixed cylinder 101a, two arc-shaped plates 106b fixed on the outer ring of the placing cylinder 106a, a movable rod 106c sliding on the inner ring of the placing cylinder 106a, and a spring 106e arranged inside the placing cylinder 106a, the outer ring of the movable rod 106c is fixedly connected with a baffle 106d, the two ends of the spring 106e are respectively fixed on one side of the baffle 106d and the inner wall of the placing cylinder 106a, and one end of the movable rod 106c is fixedly connected with a block 106f.

[0043] The number of upper limit assemblies 106 on the fixed cylinder 101a is set according to the number of push blocks 105. Since the three push blocks 105 are arranged vertically in a line in the initial position, rotating the third rotating rod 104 will drive the push block 105 on the first rotating rod 102 to squeeze one of the movable rods 106c, so that the blocking block 106f cooperates with the containing box 204. When the positions of the two upper push blocks 105 are adjusted by the second rotating rod 103 and the third rotating rod 104, one or two push blocks 105 are adjusted to be distributed in a ring around the first rotating rod 102 on the same horizontal plane as the bottom push block 105. At this time, multiple limit assemblies 106 can be controlled and squeezed.

[0044] Specifically, a groove 105a is formed on one side of the push block 105, and the groove 105a is matched with one end of the placement tube 106a located on the inner circle of the fixed tube 101a. The push block 105 is matched with the first placement groove 103e and the two second placement grooves 104b.

[0045] By setting the groove 105a, the push block 105 can cooperate with the movable rod 106c after squeezing the movable rod 106c, thereby ensuring the stability of the lifting process.

[0046] During use, taking the setting of three containing boxes 204 as an example, when the connecting plate 205 needs to be lifted, the vertically arranged push block 105 needs to be rotated to the position of the sample box 205a. At this time, the push block 105 will not contact the movable rod 106c. At this time, the cylinder 101 is turned on, and the movement of the cylinder 101 will drive the fixed cylinder 101a and the first rotating rod 102, the second rotating rod 103 and the third rotating rod 104 to move upward. During the movement, the first handle 103d at one end of the second rotating rod 103 contacts the bottom of the connecting plate 205, which will drive the connecting plate 205 to move upward, thereby driving the sample box 205a to move upward, and then the sample box 205a can be taken out.

[0047] Then, when it is necessary to take out the storage box 204, the number and position of the storage box 204 that needs to be taken out can be confirmed first. If only one storage box 204 is needed, the second handle 104a is turned, and the push block 105 at the bottom will contact the movable rod 106c, and the push block 105 is moved to the position of the storage box 204 to be taken out. The push block 105 squeezes the movable rod 106c, and the movable rod 106c will carry the card block 106f to move into the card slot 204a of the selected storage box 204. When the movable rod 106c contacts the groove 105a, the card block 106f is inserted into the card slot 204a, and then the cylinder 101 is opened, and the cylinder 101 drives the first rotating rod 102 and the placement cylinder 106a to move. At this time, the storage box 204 is driven to move upward by the card block 106f. When it moves to the specified height, the cylinder 101 is closed, and then the material is taken out, and then the storage box 204 is reset by the cylinder 101.

[0048] When it is necessary to take out multiple storage boxes 204, first determine their positions, first pull up the first handle 103d, so that the first fixing block 103f moves from the first short groove 102b to the first annular groove 102a, and then rotate the first handle 103d 120 degrees counterclockwise. After completion, slowly move the second rotating rod 103 downward so that the first fixing block 103f falls into the first long groove 102c. Due to the cooperation between the second fixing block 104c and the second short groove 103b and the second long groove 103c, when the first handle 103d is pulled and rotated, the third rotating rod 103 will be driven The movable rod 104 operates, and when the first fixed block 103f falls into the first long groove 102c, the first placement groove 103e cooperates with the push block 105 on the first rotating rod 102, and the push block 105 on the second rotating rod 103 will be on the same horizontal plane with the push block 105 on the first rotating rod 102. When the second handle 104a is pulled, the process is similar to pulling the second rotating rod 103. Finally, the three push blocks 105 are on the same horizontal plane, and then the adjacent storage box 204 can be taken out. After resetting, only the steps need to be reversed.

[0049] Example 3

[0050] Reference Figure 6 to Figure 8 , which is the third embodiment of the utility model, and is based on the first two embodiments. This embodiment provides a spent fuel storage grid, which includes a bearing unit 200, the bearing unit 200 includes a bearing assembly 201, an outer cylinder 202 and a top cover 203 arranged on the top of the bearing assembly 201, and a containing box 204 and a connecting plate 205 arranged in the bearing assembly 201. The lifting unit 100 is installed on the central axis of the lifting unit 100. The device can be sealed by the outer cylinder 202 and the top cover 203, so that it can be placed underwater without contaminating the water medium. Neutron absorbing materials and spent fuel can be placed through the sample box 205a and the containing box 204.

[0051] Specifically, the supporting assembly 201 includes a base 201a, a mounting tube 201b fixed to the top of the base 201a, and a placement box 201c fixed to the top of the mounting tube 201b. The interior of the placement box 201c is fixedly connected with a connecting tube 201d. The connecting tube 201d is provided with a through groove 201e. The through groove 201e is slidably matched with the placement tube 106a. The inner ring and the outer ring of the connecting tube 201d are slidably matched with the two arc plates 106b respectively. The cylinder 101 is installed in the mounting tube 201b.

[0052] The shape of the placement box 201c can be adjusted according to the number of the placed containing boxes 204. By setting the connecting tube 201d, the movement of the limiting component 106 can be limited to ensure the stability of the limiting component 106 during the movement, and the base 201a and the installation tube 201b provide support for the device.

[0053] Specifically, the containing box 204 is arranged in the space between the connecting tube 201d and the placing box 201c. A card slot 204a is provided on one side of the containing box 204 close to the connecting tube 201d. The card slot 204a cooperates with the card block 106f. A sample box 205a is installed on the connecting plate 205. The sample box 205a and the containing box 204 are staggered. By staggering the sample box 205a and the containing box 204, a corresponding distance can be ensured between the spent fuel in the containing box 204, and the neutron absorption material in the sample box 205a can also absorb the neutrons released by the spent fuel, so as to achieve the purpose of maintaining the subcritical state of the spent fuel pool.

[0054] In summary, firstly, the outer cylinder 202 and the top cover 203 are removed from the bearing assembly 201, and then the cylinder 101 can be opened, and the first rotating rod 102, the second rotating rod 103 and the third rotating rod 104 can be operated step by step to change the position of the push block 105, so that one or more push blocks 105 cooperate with one or more limit assemblies 106, so as to drive one or more adjacent containing boxes 204 to be taken out, and the sample box 205a can also be taken out. The specific operation is shown in Example 2, and the neutron absorbing material is judged, and its degradation and change trend are judged, so as to replace it, so as to achieve the purpose of maintaining the subcritical state of the spent fuel pool and effectively ensure the safe storage of the spent fuel.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A lifting structure, characterized in that: include, A lifting unit (100) comprises a cylinder (101), a first rotating rod (102) rotating on the telescopic end of the cylinder (101), a second rotating rod (103) movably sleeved on the outer ring of the first rotating rod (102), a third rotating rod (104) movably sleeved on the outer ring of the second rotating rod (103), a push block (105) fixed to the outer rings of the first rotating rod (102), the second rotating rod (103) and the third rotating rod (104), and a limit assembly (106) arranged above the cylinder (101).

2. The jacking structure according to claim 1, characterized in that: The telescopic end of the cylinder (101) is fixedly connected to a fixed cylinder (101a), the first rotating rod (102) is rotatably arranged at the center of the telescopic end of the cylinder (101), and the limiting assembly (106) is fixed to the outer ring of the fixed cylinder (101a).

3. The jacking structure according to claim 2, characterized in that: A first annular groove (102a) is provided on the outer ring of one end of the first rotating rod (102), and two first short grooves (102b) and two first long grooves (102c) are symmetrically provided on one side of the first annular groove (102a), wherein the length of the first long groove (102c) is longer than that of the first short groove (102b), and the pushing block (105) is fixed to the other end of the first rotating rod (102).

4. The lifting structure according to claim 3, characterized in that: The outer ring of the second rotating rod (103) is provided with a second annular groove (103a), and one side of the second annular groove (103a) is symmetrically provided with two second short grooves (103b) and two second long grooves (103c). One end of the second rotating rod (103) is fixedly connected with a first handle (103d), and the inner ring of the second rotating rod (103) is symmetrically fixedly connected with two first fixing blocks (103f) that are slidably matched with the first short groove (102b) and the first long groove (102c), and one end of the second rotating rod (103) is provided with a first placement groove (103e).

5. The lifting structure according to claim 4, characterized in that: One end of the third rotating rod (104) is fixedly connected to a second handle (104a), and the other end of the third rotating rod (104) is provided with two second placement grooves (104b). The inner circle of the third rotating rod (104) is symmetrically fixedly connected to two second fixing blocks (104c), and the second fixing blocks (104c) are slidably matched with the first annular groove (102a), the first short groove (102b), and the first long groove (102c).

6. The lifting structure according to claim 5, characterized in that: The limiting assembly (106) comprises a placement cylinder (106a) fixed on a fixed cylinder (101a), two arc-shaped plates (106b) fixed on the outer ring of the placement cylinder (106a), a movable rod (106c) sliding on the inner ring of the placement cylinder (106a), and a spring (106e) arranged inside the placement cylinder (106a), wherein the outer ring of the movable rod (106c) is fixedly connected to a baffle (106d), the two ends of the spring (106e) are respectively fixed to one side of the baffle (106d) and the inner wall of the placement cylinder (106a), and one end of the movable rod (106c) is fixedly connected to a clamping block (106f).

7. The lifting structure according to claim 6, characterized in that: A groove (105a) is provided on one side of the push block (105), and the groove (105a) is matched with one end of the placement tube (106a) located on the inner circle of the fixed tube (101a). The push block (105) is matched with the first placement groove (103e) and the two second placement grooves (104b).

8. A spent fuel storage grid, characterized in that: A jacking structure comprising any one of claims 1 to 7; as well as The bearing unit (200) comprises a bearing assembly (201), an outer cylinder (202) and a top cover (203) arranged on the top of the bearing assembly (201), and a containing box (204) and a connecting plate (205) arranged in the bearing assembly (201); the lifting unit (100) is installed on the central axis of the lifting unit (100).

9. The spent fuel storage grid according to claim 8, characterized in that: The bearing assembly (201) comprises a base (201a), a mounting tube (201b) fixed to the top of the base (201a), and a placement box (201c) fixed to the top of the mounting tube (201b); a connecting tube (201d) is fixedly connected to the interior of the placement box (201c); a through groove (201e) is provided on the connecting tube (201d); the through groove (201e) is slidably matched with the placement tube (106a); the inner ring and the outer ring of the connecting tube (201d) are slidably matched with the two arc plates (106b) respectively; and the cylinder (101) is installed in the mounting tube (201b).

10. The spent fuel storage grid according to claim 9, characterized in that: The containing box (204) is arranged in the space between the connecting tube (201d) and the placing box (201c); a card slot (204a) is provided on a side of the containing box (204) close to the connecting tube (201d); the card slot (204a) cooperates with the card block (106f); a sample box (205a) is installed on the connecting plate (205); the sample box (205a) and the containing box (204) are placed alternately.

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