Pneumatic delivery system multi-sample injector

Abstract

The application discloses a kind of pneumatic conveying system multiple sample injectors, solve the technical problem that the degree of automation and efficiency of sample placement are lower in prior art, each time irradiation needs manual in sample injector to place a sample box, the application includes placement plate, sample storage mechanism, sample storage box, telescopic sample pushing mechanism, telescopic sealing mechanism, bottom plate, first support and second support;Multiple sample boxes for containing samples are vertically placed in the sample storage mechanism, the telescopic sample pushing mechanism can push the sample box at the bottom into the sample tank along the placement plate, improve the degree of automation and efficiency of sample placement;The sample box entering the sample storage box is sealed by telescopic sealing mechanism, and the sealing property is good.

Description

TECHNICAL FIELD

[0001] The present application relates to a radioactive sample conveying device, in particular to a multi-sample feeder of a pneumatic conveying system. BACKGROUND

[0002] Irradiation technology is to use radioisotopes, reactors or accelerators to generate ionizing radiation sources such as electron beams, gamma rays and neutrons, and to irradiate the material to cause ionization, excitation and other effects, thereby changing the physical, chemical or biological properties of the material.

[0003] At present, when irradiating, storing and detecting samples, the sample is usually manually loaded into a sample box, and one sample box is placed in a pneumatic conveying device each time to convey the sample through the pneumatic conveying device. This method results in low automation and efficiency of sample irradiation.

[0004] In addition, in the invention patent with the application number CN201611029830.2 and the name of a neutron activation analysis rabbit device, the transportation of the sample box is disclosed. However, the patent sets up many route changers, and the rabbit device needs to control multiple branch changers when conveying the sample box, which makes the control process more complex. SUMMARY

[0005] The purpose of the present application is to solve the technical problems in the prior art that manual loading of a sample box is required in the sample feeder each time for irradiation, resulting in low automation and efficiency of sample irradiation, or many route changers need to be set up, and multiple branch changers need to be controlled separately when conveying the sample box, resulting in a complex control process. The present application provides a multi-sample feeder of a pneumatic conveying system.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] A multi-sample feeder of a pneumatic conveying system, characterized in that it comprises a placement plate, a sample storage mechanism, a sample storage box, a telescopic sample pushing mechanism, a telescopic sealing mechanism, a bottom plate, a first support and a second support;

[0008] The first support and the sample storage box are fixedly connected to the bottom plate;

[0009] The sample storage mechanism is a long rectangular cylindrical structure with an open upper end, used for storing sample boxes. A push-in hole is oppositely provided on the lower end side wall of the sample storage mechanism. One side of the placement plate is fixedly connected to the lower end. One end of the placement plate is fixedly connected to the sample storage box. The outer wall of the sample storage box is fixedly connected to the outer wall of the sample storage mechanism;

[0010] A sample pushing channel is oppositely provided on the sample storage box at the push-in hole. A placement groove is provided in the sample storage box for placing a sample box;

[0011] The fixed end of the telescopic sample pushing mechanism is connected with the first support, and the working end passes through the pushing hole and can extend into the sample storage mechanism to push the sample box to move from the sample storage mechanism to the placing groove;

[0012] The fixed end of the telescopic sealing mechanism is connected with the outer wall of the sample storage mechanism through the second support, and the working end corresponds to and can extend to the placing groove to seal the sample box in the placing groove.

[0013] Further, the sample storage mechanism comprises a sample storage cylinder, a sliding rail and a sliding cover.

[0014] The sample storage cylinder is a rectangular cylinder structure with open upper and lower ends, used for storing a plurality of sample boxes. The lower end side wall of the sample storage cylinder is relatively provided with a pushing hole, and the lower end is connected with a placing plate.

[0015] The upper end of the sample storage cylinder is connected with the sliding rail through screws or welding, and the sliding cover is slidingly connected with the sliding rail.

[0016] The outer wall of the sample storage cylinder is connected with the fixed end of the telescopic sealing mechanism through the second support, the lower end outer wall of the sample storage cylinder is connected with the outer wall of the sample storage box, and the pushing hole is arranged opposite to the sample storage box.

[0017] Further, the side of the sample storage cylinder facing the telescopic sample pushing mechanism is provided with an outlet, and a hinged door is arranged on the sample storage cylinder at the outlet to cover the outlet.

[0018] Further, the sample storage box comprises a shell a and a shell b, one end of the shell b is connected with a bottom plate, and the other end is connected with the shell a.

[0019] A sample pushing channel is arranged on the side of the shell a at the connection with the shell b, the outer wall of the shell a is connected with the sample storage cylinder, a through hole is arranged in the shell a in the vertical direction and communicates with the sample pushing channel, and one side of the shell a is further connected with an observation window.

[0020] A placing groove is arranged in the shell b and communicates with the through hole, the outer wall of the shell b is connected with the end of the placing plate, the upper surface of the placing plate is flush with the bottom of the sample pushing channel, and the working end of the telescopic sealing mechanism extends into the placing groove through the through hole of the shell a.

[0021] First and second mounting holes are arranged on both sides of the placing groove in the shell b, and a pair of photoelectric sensors are arranged in the first and second mounting holes respectively to detect whether there is a sample box in the placing groove.

[0022] A conveying channel is arranged on the shell b along the length direction of the placing groove, and a conveying pipeline coaxial with the conveying channel is arranged on the outer wall of the sample storage box to convey the sample box in the placing groove out by airflow.

[0023] Further, the telescopic pushing mechanism comprises a first telescopic member and a pushing member, and the moving end of the first telescopic member is connected to or welded with the pushing member through a pin;

[0024] The fixed end of the first telescopic member is connected to the first support;

[0025] The pushing member penetrates through the pushing hole and can extend into the sample storage mechanism, and the pushing member is used for pushing the sample box along the placement plate to the placement groove.

[0026] Further, a containing through hole is formed in the pushing member, and the containing through hole is used for positioning and containing the sample box.

[0027] Further, the telescopic sealing mechanism comprises a second telescopic member and a gland, the moving end of the second telescopic member is connected to or welded with the gland through a pin, the fixed end of the second telescopic member is connected to the outer wall of the sample storage cylinder in the sample storage mechanism through a second support, and the gland is a working end and can extend into the placement groove;

[0028] The moving range of the gland is from the through hole of the shell a to the placement groove, and the gland is used for sealing the sample box in the placement groove.

[0029] Further, the gland comprises a baffle, a sealing block and a gasket;

[0030] One side of the baffle is connected to or welded with the moving end of the second telescopic member through a pin, the other side of the baffle is connected to the gasket and the sealing block in sequence, the bottom surface of the sealing block is concave and is used for adapting and fitting the surface of the sample box, and the side wall of the sealing block is fitted with the inner wall of the placement groove when moving.

[0031] Further, at least one ring groove is formed in the side wall of the sealing block, and one sealing ring is arranged in each ring groove, the sealing ring is fitted with the inner wall of the placement groove and is used for dynamic sealing.

[0032] The beneficial effects of the present application are as follows:

[0033] (1) The pneumatic conveying system multi-sample feeder can vertically place a plurality of sample boxes containing samples in the sample storage mechanism, and the telescopic pushing mechanism can push the sample box at the bottom along the placement plate into the sample box, thereby improving the automation degree and efficiency of sample placement.

[0034] (2) The pneumatic conveying system multi-sample feeder can seal the sample box entering the sample storage box through the telescopic sealing mechanism, and the sealing performance is good.

[0035] (3) The pneumatic conveying system multi-sample feeder has simple structure, simple and easy-to-implement control mode, and high practicability. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of a multi-sample injector in a pneumatic delivery system according to the present invention. Figure 1 ;

[0037] Figure 2 This is a schematic diagram of the structure of a multi-sample injector in a pneumatic delivery system according to the present invention. Figure 2 ;

[0038] Figure 3 This is a schematic diagram of the structure of a multi-sample injector in a pneumatic delivery system according to the present invention. Figure 3 ;

[0039] Figure 4 yes Figure 3 A cross-sectional view along the AA direction;

[0040] Figure 5 This is a schematic diagram of the sample storage mechanism in Embodiment 1 of a pneumatic conveying system multi-sample injector of the present invention;

[0041] Figure 6 This is a schematic diagram of the telescopic pusher mechanism in Embodiment 1 of a pneumatic conveying system multi-sample feeder of the present invention;

[0042] Figure 7 This is a schematic diagram of the telescopic sealing mechanism in Embodiment 1 of a pneumatic conveying system multi-sample injector of the present invention.

[0043] In the diagram, 1-placement plate; 2-sample storage mechanism; 201-sample storage cylinder; 202-slide rail; 203-sliding cover; 204-door; 3-sample storage box; 301-placement slot; 302-shell a; 303-shell b; 304-observation window; 305-first mounting hole; 306-second mounting hole; 4-telescopic pusher mechanism; 401-first telescopic component; 402-pusher component; 403-accommodating through hole; 5-telescopic sealing mechanism; 501-second telescopic component; 502-pressure cover; 5021-baffle; 5022-sealing block; 5023-gasket; 6-base plate; 7-first bracket; 8-second bracket; 9-through-beam sensor; 10-transportation pipe; 11-sample box. Detailed Implementation

[0044] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] This embodiment provides a pneumatic delivery system multi-sample injector, such as... Figure 1、 Figure 2 、 Figure 3 The multi-sample injector includes a placing plate 1, a sample storage mechanism 2, a sample storage box 3, a retractable sample pushing mechanism 4 and a retractable sealing mechanism 5.

[0046] The opening end of the sample storage mechanism 2 faces downward, and the placing plate 1 is used to place the sample box 11 coming out of the sample storage mechanism 2.

[0047] The sample storage mechanism 2 stores a plurality of sample boxes 11, and releases one sample box 11 to the placing plate 1 at a time.

[0048] In the multi-sample injector shown in Figure 1 and Figure 2 , the sample storage mechanism 2 is located above the placing plate 1, and the sample box 11 comes out of the sample storage mechanism under the action of gravity and falls on the placing plate 1.

[0049] Of course, the relative positions of the sample storage mechanism 2 and the placing plate 1 are not limited to Figure 1 and Figure 2 The sample storage mechanism 2 can also be located in other positions of the placing plate 1.

[0050] The storage space of the sample storage mechanism 2 can store a plurality of sample boxes 11, so that the operator can put a plurality of sample boxes 11 to be irradiated into the storage space at one time, thereby saving the operator's manpower.

[0051] As shown in Figure 4 , the sample storage box 3 is connected to one side of the placing plate 1, so that the sample box 11 moving on the placing plate 1 can enter the sample storage box 3; and the sample storage box 3 is provided with a placing groove 301 in communication with the conveying pipeline 10, and the sample box 11 entering the placing groove 301 can enter the conveying pipeline 10 under the action of the airflow of the conveying pipeline 10.

[0052] The placing groove 301 shown in Figure 4 opens upward, and the sample box 11 on the placing plate 1 can fall into the placing groove 301 downward after entering the sample storage box 3 under the pushing of the retractable sample pushing mechanism 4. The opening direction of the placing groove 301 is not limited to Figure 3 the structure shown, but can also be other directions. For example, the opening of the placing groove 301 faces the retractable sample pushing mechanism 4, and the sample box 11 is directly pushed into the placing groove 301 by the retractable sample pushing mechanism 4.

[0053] Continuing to refer to Figure 4 , the working end of the retractable sample pushing mechanism 4 extends into the sample storage mechanism 2 and can push the sample box 11 on the placing plate 1 into the placing groove 301.

[0054] When irradiation is required, the working end of the telescopic pusher mechanism 4 moves toward the location of the sample storage box 3, pushing the sample box 11, which has exited from the sample storage mechanism 2 and is located on the placement plate 1, so that the sample box 11 moves on the placement plate 1 and finally enters the placement slot 301 in the sample storage box 3. After the pusher operation is completed, the working end of the telescopic pusher mechanism 4 retracts.

[0055] The working end of the telescopic sealing mechanism 5 can close and open the opening of the placement groove 301.

[0056] When sample box 11 needs to be pushed into placement slot 301, the opening of placement slot 301 is open. After the telescopic pusher mechanism 4 pushes sample box 11 into placement slot 301, the working end of telescopic sealing mechanism 5 moves towards the location of placement slot 301 until it closes the opening of placement slot 301, preventing airflow from flowing out of the opening of placement slot 301, so that sample box 11 can move normally in conveying pipe 10. When one sample box 11 has finished conveying, the working end of telescopic sealing mechanism 5 moves away from placement slot 301, and the opening of placement slot 301 is opened, so that the next sample box 11 can smoothly enter placement slot 301.

[0057] Reference Figure 4 The opening of the placement groove 301 faces upward, and the telescopic sealing mechanism 5 is located above the placement groove 301; the working end of the telescopic sealing mechanism 5 can move up and down. Of course, the telescopic sealing mechanism 5 can also be located in other positions within the placement groove 301; for example, in… Figure 3 As shown, the telescopic sealing mechanism 5 can also be located on the right side of the placement groove 301. The working end of the telescopic sealing mechanism 5 can move in the left and right directions to close or open the opening of the placement groove 301.

[0058] In this embodiment, the multi-sample injector operates as follows: First, the sample ejection mechanism releases a sample box 11 onto the placement plate 1. Then, the telescopic pushing mechanism 4 pushes the sample box 11 from the placement plate 1 into the placement slot 301 of the sample storage box 3. Finally, the telescopic sealing mechanism 5 seals the opening of the placement slot 301. Airflow propulsion is generated in the delivery pipe 10, pushing the sample box 11 into the reactor for irradiation. The process is repeated for each subsequent irradiation. Therefore, this multi-sample injector allows operators to place multiple sample boxes 11 at once and automatically inserts one sample box 11 into the delivery pipe 10 each time, eliminating the need to place the sample box 11 for each irradiation, thus improving the automation and efficiency of sample placement.

[0059] In this embodiment, refer to Figure 6The telescopic sample pushing mechanism 4 includes a first telescopic member 401 and a sample pushing member 402. One end of the sample pushing member 402 is connected to the working end of the first telescopic member 401, and the other end of the sample pushing member 402 is located between the placement plate 1 and the sample storage mechanism 2. The sample pushing member 402 can move towards or away from the placement groove 301 under the drive of the first telescopic member 401.

[0060] The first telescopic component 401 can be an electric push rod, capable of extending and retracting along its own length. Of course, the first telescopic rod can also be other structural forms such as a hydraulic cylinder or a pneumatic cylinder.

[0061] like Figure 6 The working end of the first telescopic member 401 shown is connected to the pusher member 402 by a pin. Of course, in some other embodiments of this application, the working end of the first telescopic member 401 is welded to the pusher member 402.

[0062] When it is necessary to push the sample box 11 located on the placement plate 1 into the placement slot 301, the first telescopic member 401 extends. The working end of the first telescopic member 401 drives the pusher 402 to move from the initial position toward the placement slot 301, thereby pushing the sample box 11 into the placement slot 301. After the sample box 11 is pushed into the placement slot 301, the first telescopic member 401 retracts. The working end of the first telescopic member 401 drives the pusher 402 to move away from the placement slot 301 until the pusher 402 returns to the initial position of pushing the sample box 11.

[0063] Continue to refer to Figure 6 The sample pusher 402 has a receiving through hole 403 for the sample box 11 to enter. When the sample storage mechanism 2 releases a sample box 11, the sample box 11 enters the receiving through hole 403. The inner wall of the receiving through hole 403 can restrict the movement of the sample box 11 and prevent the sample box 11 coming out of the sample storage mechanism 2 from moving freely on the placement plate 1.

[0064] By setting the relative distance between the telescopic pusher mechanism 4 and the sample storage mechanism 2, and the telescopic distance of the first telescopic member 401, it is possible to align the receiving through hole 403 with the position where the sample storage mechanism 2 releases the sample box 11 when the first telescopic member 401 shortens and drives the pusher 402 back to the initial position; and to align the receiving through hole 403 with the opening of the placement groove 301 when the first telescopic member 401 extends and drives the pusher 402 to extend a preset distance.

[0065] In this embodiment, refer to Figure 1 and Figure 2 The embodiments of this application also include a base plate 6 and a first support 7. The first support 7 is disposed on the base plate 6, and the telescopic pusher mechanism 4 is connected to the first support 7. When the telescopic pusher mechanism 4 has the above-described structure, the end of the first telescopic member 401 that is away from the pusher member 402 is connected to the first support 7.

[0066] In the embodiment, with reference to Figure 7 , the telescopic sealing mechanism 5 comprises a second telescopic member 501 and a cover 502. The cover 502 is connected to the working end of the second telescopic member 501, and the cover 502 is driven by the second telescopic member 501 to move towards or away from the placement slot 301.

[0067] The second telescopic member 501 can be an electric push rod, which can be telescopic in the length direction of the second telescopic member 501. Of course, the second telescopic member 501 can also be a hydraulic cylinder, an air cylinder or other structural forms.

[0068] As shown in Figure 7 , the working end of the second telescopic member 501 is connected to the cover 502 by a pin. Of course, in other embodiments, the working end of the second telescopic member 501 is welded to the cover 502.

[0069] When the sample box 11 is pushed into the placement hole by the sample pushing member 402, the second telescopic member 501 is elongated, and the working end of the telescopic member drives the cover 502 to move towards the opening of the placement slot 301 until the cover 502 closes the opening of the placement slot 301, so that the placement slot 301 is isolated from the outside. When the sample box 11 is transported to the reaction pile by the airflow in the transport pipeline 10, the second telescopic member 501 is shortened, and the working end of the telescopic member drives the cover 502 to move away from the opening of the placement slot 301, so that the opening of the placement slot 301 is opened to allow the telescopic sample pushing mechanism 4 to push the next sample box 11 into the placement slot 301.

[0070] Figure 7 The specific structure of the cover 502. The cover 502 comprises a baffle 5021, a sealing block 5022 and a gasket 5023. The baffle 5021 is connected to the working end of the second telescopic member 501. The sealing block 5022 is arranged on the bottom surface of the baffle 5021 and is used to extend into the placement slot 301 and abut the inner wall of the placement slot 301. The gasket 5023 is arranged on the bottom surface of the baffle 5021 and surrounds the sealing block 5022.

[0071] The sealing block 5022 is integrally connected to the baffle 5021, and the top surface of the gasket 5023 is bonded to the bottom surface of the baffle 5021. Of course, the sealing block 5022 and the baffle 5021 can also be connected by welding, and the gasket 5023 can also be connected to the bottom surface of the baffle 5021 by screws.

[0072] When the cover 502 closes the opening of the placement slot 301, the outer side surface of the sealing block 5022 abuts the inner wall of the placement slot 301, and the baffle 5021 presses the gasket 5023 against the edge of the placement slot 301. The cover 502 cooperates with the sealing block 5022 through the gasket 5023 to isolate the placement slot 301 from the outside, avoiding leakage of the airflow in the transport pipeline 10.

[0073] With reference to Figure 7 , the bottom surface of the placement groove 301 and the bottom surface of the sealing block 5022 are both provided as a circular arc surface, forming an inner wall surface that is adapted to the sample box 11. Specifically, the inner wall formed by the bottom surface of the placement groove 301 and the bottom surface of the sealing block 5022 is a cylindrical surface, which is fitted with the outer side surface of the sample box 11 as shown in the figure, avoiding excessive airflow between the sample box 11 and the bottom surface of the sealing block 5022 and between the sample box 11 and the bottom surface of the placement groove 301, which would affect the transportation of the sample box 11, ensuring that the airflow in the transportation pipeline 10 can push the sample box 11 in the placement groove 301. Figure 5

[0074] It should be noted that the specific structure of the gland 502 is not limited to the above, and in other embodiments of the present application, the gland 502 can also have other structures.

[0075] As shown in Figures 1 to 4 , the sample storage mechanism 2 is arranged above the placement plate 1, and the sample box 11 released from the sample storage mechanism 2 falls on the upper surface of the placement plate 1.

[0076] In this embodiment, as shown in Figure 5 , the sample storage mechanism 2 includes a sample storage cylinder 201, a sliding rail 202, and a sliding cover 203. The sample storage cylinder 201 is located above the placement plate 1, and a plurality of sample boxes 11 can be arranged in the sample storage cylinder 201. The sliding rail 202 is arranged on the top of the sample storage cylinder 201 in the horizontal direction; and the sliding cover 203 is slidingly connected to the sliding rail 202.

[0077] Both ends of the sample storage cylinder 201 have openings, the opening at the top of the sample storage cylinder 201 is used for placing the sample box 11, and the opening at the bottom of the sample storage cylinder 201 is used for the sample box 11 to fall down.

[0078] The sliding rail 202 is connected to the top of the sample storage cylinder 201 by screws. The sliding rail 202 can also be welded to the top of the sample storage cylinder 201.

[0079] When it is necessary to place sample boxes 11 in the sample storage mechanism 2, the sliding cover 203 is slid along the sliding rail 202 to move away from the opening at the top of the sample storage cylinder 201, and after the opening at the top of the sample storage cylinder 201 is opened, the operator places a plurality of sample boxes 11 in the sample storage cylinder 201 according to the pre-set irradiation order, and the plurality of sample boxes 11 in the sample storage cylinder 201 are arranged in the height direction as shown in Figure 5 .

[0080] With reference to Figure 5 , the sample storage mechanism 2 further includes a door 204, and the sample storage cylinder 201 is provided with an outlet facing the first telescopic sample pushing mechanism 4. The door 204 is hinged to the sample storage cylinder 201, and the door 204 can cover the outlet.

[0081] ​A hinge is arranged beside the outlet of the sample storage cylinder 201, and the door 204 is connected to the hinge, so that the door 204 can be opened and closed by rotating around the hinge. When the door 204 is closed, the outlet is covered. When it is necessary to observe the sample box 11 placed in the sample storage cylinder 201, the door 204 can be opened for observation.

[0082] In the embodiment, the sample storage box 3 is provided with a first mounting hole 305 and a second mounting hole 3046 which are coaxial and communicate with the placing groove 301. The multi-sample feeder further comprises two pairs of photoelectric sensors 9 which are respectively mounted in the first mounting hole 305 and the second mounting hole 3046 to detect the sample box 11 in the placing groove 301.

[0083] When the telescopic sample pushing mechanism 4 pushes the sample box 11 into the placing groove 301, the two pairs of photoelectric sensors 9 mounted in the first mounting hole 305 and the second mounting hole 3046 can detect the sample box 11 in the placing groove 301, and then control the telescopic sealing mechanism 5 to close the opening of the placing groove 301.

[0084] Referring to Figure 2 With Figure 4 , the sample storage box 3 comprises a shell a 302 and a shell b 303. The shell a 302 is connected to the shell b 303, and the placing plate 1 is connected to the shell b 303, and the top surface of the placing plate 1 is flush with the top surface of the shell b 303. The side of the shell a 302 facing the sample storage mechanism 2 is provided with a sample pushing channel for the working end of the telescopic sample pushing mechanism 4 and the sample box 11 to pass through. The placing groove 301 is arranged in the shell b 303, and the opening of the placing groove 301 faces upward, and the telescopic sealing mechanism 5 is located above the placing groove 301; the first mounting hole 305 and the second mounting hole 3046 are also arranged in the shell b 303.

[0085] As Figure 2 shown, the sample storage box 3 further comprises an observation window 304 arranged in the shell a 302. The operator can observe whether the telescopic sample pushing mechanism 4 pushes the sample box 11 into the placing groove 301 through the observation window 304.

[0086] Embodiment Two

[0087] Different from the embodiment one, at least one annular groove is arranged on the side wall of the sealing block 5022, and a sealing ring is arranged in each annular groove, which is placed in close contact with the inner wall of the placing groove 301 for dynamic sealing; when the sample box 11 is pushed into the placing groove 301 by the telescopic pushing mechanism 4, the working end of the second telescopic part 501 drives the sealing block 5022 to move towards the direction close to the placing groove 301; when the sealing block 5022 extends into the placing groove 301, the sealing ring is in close contact with the inner wall of the placing groove 301, thereby achieving the closure of the opening of the placing groove 301.

[0088] The above is only a specific embodiment of the present application, and the effect of the related specific embodiment and the related comparative example is compared, but the protection scope of the present application is not limited thereto, any change or replacement within the technical scope disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multi-sample injector for a pneumatic conveying system, characterized in that: It includes a placement plate (1), a sample storage mechanism (2), a sample storage box (3), a telescopic sample pushing mechanism (4), a telescopic sealing mechanism (5), a base plate (6), a first support (7), and a second support (8); The first bracket (7) and the sample storage box (3) are fixedly connected to the base plate (6); The sample storage mechanism (2) is a rectangular cylindrical structure with an open top, used to store sample boxes (11). The lower sidewalls of the sample storage mechanism (2) have push-in holes, and the lower end is fixedly connected to one side of the placement plate (1). One end of the placement plate (1) is fixedly connected to the sample storage box (3), and the outer wall of the sample storage box (3) is fixedly connected to the outer wall of the sample storage mechanism (2). A push-out channel is provided on the sample storage box (3) at the push-in hole, and a placement slot (301) is provided inside the sample storage box (3) for placing the sample box (11). The sample storage box (3) includes a shell a (302) and a shell b (303). One end of the shell b (303) is connected to the bottom plate (6), and the other end is connected to the shell a (302). A sample pushing channel is opened on one side of the housing a (302) at the connection of the housing b (303). The outer wall of the housing a (302) is attached to the outer wall of the sample storage mechanism (2). A through hole communicating with the sample pushing channel is opened vertically inside the housing a (302). An observation window (304) is also connected to one side of the housing a (302). The housing b (303) has a placement groove (301) that communicates with the through hole. The outer wall of the housing b (303) is connected to the end of the placement plate (1), and the top of the placement plate (1) is flush with the bottom of the push-sample channel. The working end of the telescopic sealing mechanism (5) extends through the through hole of the housing a (302) into the placement groove (301). The housing b (303) has a first mounting hole (305) and a second mounting hole (306) respectively on both sides of the placement groove (301). A through-beam sensor (9) is provided in the first mounting hole (305) and the second mounting hole (306) respectively to detect whether there is a sample box (11) in the placement groove (301). A conveying channel is opened on the shell b (303) along the length direction of the placement groove (301), and the outer wall of the sample storage box (3) is connected to a conveying pipe (10) coaxial with the conveying channel, which is used to convey the sample box (11) in the placement groove (301) out by airflow. The fixed end of the telescopic pusher mechanism (4) is connected to the first bracket (7), and the working end passes through the push hole and can extend into the sample storage mechanism (2) to push the sample box (11) from the sample storage mechanism (2) to the placement slot (301); The telescopic pusher mechanism (4) includes a first telescopic component (401) and a pusher component (402). The moving end of the first telescopic component (401) is connected to or welded to the pusher component (402) via a pin. The fixed end of the first telescopic member (401) is connected to the first bracket (7); The pusher (402) passes through the push-in hole and can extend into the sample storage mechanism (2). The pusher (402) is used to push the sample box (11) to move into the placement slot (301). The sample pusher (402) has a receiving through hole (403) for positioning and receiving the sample box (11); The fixed end of the telescopic sealing mechanism (5) is connected to the outer wall of the sample storage mechanism (2) through the second bracket (8), and the working end is corresponding to and can extend movably to the placement groove (301) to seal the sample box (11) in the placement groove (301).

2. The multi-sample injector for a pneumatic conveying system according to claim 1, characterized in that: The sample storage mechanism (2) includes a sample storage cylinder (201), a slide rail (202), and a sliding cover (203); The sample storage tube (201) is a rectangular cylindrical structure with openings at both the top and bottom ends, used to store multiple sample boxes (11). The lower sidewall of the sample storage tube (201) has push-in holes, and the lower end is connected to a placement plate (1). The upper end of the sample storage cylinder (201) is connected to the slide rail (202) by screws or welded, and the sliding cover (203) is slidably connected to the slide rail (202). The outer wall of the sample storage cylinder (201) is connected to the fixed end of the telescopic sealing mechanism (5) through the second bracket (8). The lower outer wall of the sample storage cylinder (201) is attached to the outer wall of the sample storage box (3), and the push-in hole is set opposite to the push-in channel of the sample storage box (3).

3. The multi-sample injector for a pneumatic conveying system according to claim 2, characterized in that: The sample storage cylinder (201) has an outlet on its side facing the telescopic pusher mechanism (4), and a hinged door (204) is located at the outlet on the sample storage cylinder (201) to cover the outlet.

4. The multi-sample injector for a pneumatic conveying system according to claim 1, characterized in that: The telescopic sealing mechanism (5) includes a second telescopic component (501) and a pressure cap (502). The moving end of the second telescopic component (501) is connected to or welded to the pressure cap (502) via a pin. The fixed end of the second telescopic component (501) is connected to the outer wall of the sample storage cylinder (201) in the sample storage mechanism (2) via a second bracket (8). The pressure cap (502) is the working end, corresponding to and extending into the placement groove (301). The moving range of the pressure cap (502) is: from the through hole of the housing a (302) to the placement groove (301), which is used to seal the sample box (11) in the placement groove (301).

5. The multi-sample injector for a pneumatic conveying system according to claim 4, characterized in that: The gland (502) includes a baffle (5021), a sealing block (5022), and a gasket (5023); One side of the baffle (5021) is connected to or welded to the moving end of the second telescopic member (501) by a pin. The other side of the baffle (5021) is connected to a gasket (5023) and a sealing block (5022) in sequence. The bottom surface of the sealing block (5022) is a concave arc surface and is used to fit and conform to the surface of the sample box (11). When the side wall of the sealing block (5022) moves, it fits against the inner wall of the placement groove (301).

6. The multi-sample injector for a pneumatic conveying system according to claim 5, characterized in that: At least one annular groove is provided on the side wall of the sealing block (5022), and a sealing ring is provided in each annular groove. The sealing ring fits against the inner wall of the placement groove (301) for dynamic sealing.

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