Multi-sample injector of pneumatic conveying system

Abstract

The invention discloses a multi-sample injector of a pneumatic conveying system, and solves the technical problems that in the prior art, a sample box needs to be manually placed in an injector every time irradiation is carried out, so that the automation degree and the efficiency of lofting are low. The device comprises a placing plate, a sample storage mechanism, a sample storage box, a telescopic sample pushing mechanism, a telescopic sealing mechanism, a bottom plate, a first bracket and a second bracket, a plurality of sample boxes for containing samples are vertically placed in the sample storage mechanism, and the telescopic sample pushing mechanism can push the sample boxes at the bottom into a sample box along a placement plate, so that the automation degree and efficiency of sample placement are improved; the sample box entering the sample storage box is sealed through the telescopic sealing mechanism, and the sealing performance is good.

Description

Technical Field

[0001] The invention relates to a radioactive sample conveying device, in particular to a multi-sample injector of a pneumatic conveying system. Background Art

[0002] Irradiation technology uses ionizing radiation sources such as radioactive isotopes, electron beams, gamma rays, neutrons, etc. produced by reactors or accelerators to irradiate matter, causing ionization, excitation and other effects, thereby changing the physical, chemical or biological properties of the matter.

[0003] At present, when performing tasks such as irradiation, storage, and testing on samples, samples are usually loaded into sample boxes manually, and one sample box is placed into a pneumatic conveying device at a time, and the samples are transported by the pneumatic conveying device. This method results in a low degree of automation and efficiency in sample placement.

[0004] In addition, the invention patent with application number CN201611029830.2 and name "A Neutron Activation Analysis Running Rabbit Device" discloses the transportation of sample boxes. However, a large number of switchers are provided in the patent. The running rabbit device needs to control multiple switchers when transporting sample boxes, and the control process is relatively complicated. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems in the prior art that each time irradiation is performed, a sample box needs to be placed manually in the sampler, resulting in a low degree of automation and efficiency of sample placement, or more switchers need to be set up, and multiple switchers need to be controlled separately when transporting the sample box, resulting in a more complicated control process, and to provide a pneumatic conveying system multi-sample injector.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A multi-sample injector for a pneumatic conveying system, which is special 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 bracket and a second bracket;

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

[0009] The sample storage mechanism is a rectangular cylindrical structure with an opening at the upper end, and is used to store the sample box. The lower end side wall of the sample storage mechanism is provided with a push-in hole, and the lower end is fixedly connected to one side of the placement plate. One end of the placement plate is fixedly connected to the sample storage box, and the outer wall of the sample storage box is fixedly connected to the outer wall of the sample storage mechanism.

[0010] The sample storage box is provided with a sample pushing channel at a position opposite to the pushing hole, and the sample storage box is provided with a placement groove for placing the sample box;

[0011] The fixed end of the telescopic sample pushing mechanism is connected to the first bracket, and the working end passes through the pushing hole and can extend into the sample storage mechanism to push the sample box from the sample storage mechanism to the placement slot;

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

[0013] Furthermore, the sample storage mechanism includes a sample storage cylinder, a slide rail and a slide cover;

[0014] The sample storage tube is a rectangular cylindrical structure with openings at the upper and lower ends, and is used to store multiple sample boxes. The lower end side walls of the sample storage tube are provided with push-in holes, and the lower end is connected to a placement plate.

[0015] The upper end of the sample storage cylinder is connected to a slide rail by screws or welding, and the slide cover is slidably connected to the slide rail;

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

[0017] Furthermore, the sample storage tube is provided with an outlet on the side facing the telescopic sample pushing mechanism, and a hinged door is provided on the sample storage tube at the outlet for covering the outlet.

[0018] Furthermore, the sample storage box comprises a shell a and a shell b, one end of the shell b is connected to the bottom plate, and the other end is connected to the shell a;

[0019] The side of the shell a is connected to the shell b and a sample pushing channel is provided. The outer wall of the shell a is closely connected to the sample storage cylinder. A through hole communicating with the sample pushing channel is vertically provided in the shell a. One side of the shell a is also connected to an observation window.

[0020] The housing b is provided with a placement groove communicating with the through hole, the outer wall of the housing b is connected to the end of the placement plate, and the top of the placement plate is flush with the bottom of the sample pushing channel, and the working end of the telescopic sealing mechanism passes through the through hole of the housing a and extends into the placement groove;

[0021] The housing b has a first mounting hole and a second mounting hole respectively disposed on both sides of the placement slot, and the first mounting hole and the second mounting hole are respectively provided with a through-beam sensor for detecting whether there is a sample box in the placement slot;

[0022] The housing b is provided with a delivery channel along the length direction of the placement slot, and the outer wall of the sample storage box is connected to a delivery pipe coaxial with the delivery channel, so as to deliver the sample box in the placement slot out through airflow.

[0023] Furthermore, the telescopic sample-pushing mechanism comprises a first telescopic member and a sample-pushing member, and the moving end of the first telescopic member is connected to the sample-pushing member by a pin or welded;

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

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

[0026] Furthermore, a receiving through hole is provided on the sample pushing member, and the receiving through hole is used for positioning and receiving the sample box.

[0027] Furthermore, the telescopic sealing mechanism includes a second telescopic member and a pressure cover, the movable end of the second telescopic member is connected to the pressure cover by a pin or welding, the fixed end of the second telescopic member is connected to the outer wall of the sample storage tube in the sample storage mechanism through a second bracket, and the pressure cover is a working end, corresponding to and can extend into the placement slot;

[0028] The moving range of the pressure cover is from the through hole of the housing a to the placement groove, and is used to seal the sample box in the placement groove.

[0029] Furthermore, the gland includes a baffle, a sealing block and a gasket;

[0030] One side of the baffle is connected to the movable end of the second telescopic member by a pin or welded, and 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 a concave arc surface and is used to adapt and fit with the surface of the sample box. The side wall of the sealing block fits with the inner wall of the placement groove when moving.

[0031] Furthermore, at least one annular groove is provided on the side wall of the sealing block, and a sealing ring is arranged in each annular groove. The sealing ring fits the inner wall of the groove for dynamic sealing.

[0032] Beneficial effects of the present invention:

[0033] (1) The present invention provides a pneumatic conveying system multi-sample injector, in which multiple sample boxes containing samples are vertically placed in a sample storage mechanism, and a telescopic sample pushing mechanism can push the sample box at the bottom along the placement plate into the sample box, thereby improving the automation and efficiency of sample placement.

[0034] (2) The multi-sample injector of the pneumatic conveying system of the present invention seals the sample box entering the sample storage box through a telescopic sealing mechanism, and has good sealing performance.

[0035] (3) The multi-sample injector of the pneumatic conveying system of the present invention has a simple structure, a concise and easy-to-implement control method, and high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The structure diagram of the embodiment 1 of the pneumatic conveying system multi-sample injector of the present invention is Figure 1 ;

[0037] Figure 2 The structure diagram of the embodiment 1 of the pneumatic conveying system multi-sample injector of the present invention is Figure 2 ;

[0038] Figure 3 The structure diagram of the embodiment 1 of the pneumatic conveying system multi-sample injector of the present invention is Figure 3 ;

[0039] Figure 4 yes Figure 3 Sectional view in the AA direction;

[0040] Figure 5 It is a structural schematic diagram of a sample storage mechanism in a first embodiment of a multi-sample injector for a pneumatic conveying system of the present invention;

[0041] Figure 6 It is a structural schematic diagram of a telescopic sample pushing mechanism in a first embodiment of a multi-sample injector of a pneumatic conveying system of the present invention;

[0042] Figure 7 It is a structural schematic diagram of a telescopic sealing mechanism in a first embodiment of a multi-sample injector of a pneumatic conveying system of the present invention.

[0043] In the figure, 1-placing plate; 2-sample storage mechanism; 201-sample storage tube, 202-slide rail, 203-slide cover, 204-door; 3-sample storage box, 301-placing slot, 302-shell a, 303-shell b, 304-observation window, 305-first mounting hole, 306-second mounting hole; 4-telescopic sample pushing mechanism; 401-first telescopic part, 402-sample pushing part, 403-accommodating through hole; 5-telescopic sealing mechanism, 501-second telescopic part, 502-pressure cover; 5021-baffle, 5022-sealing block, 5023-gasket; 6-bottom plate; 7-first bracket; 8-second bracket; 9-counter-type sensor; 10-delivery pipeline; 11-sample box. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0046] The opening end of the sample storage mechanism 2 faces downward, and the placement plate 1 is used to place the sample box 11 taken 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 placement plate 1 each time.

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

[0049] Of course, the relative position of the sample storage mechanism 2 and the placement plate 1 is not necessarily Figure 1 and Figure 2 The structure shown is a limitation, and the sample storage mechanism 2 can also be located at other positions of the placement plate 1.

[0050] The storage space of the sample storage mechanism 2 can store multiple sample boxes 11, so that the operator can put multiple sample boxes 11 that need to be irradiated into the storage space at one time, and there is no need to place a sample box 11 into the sampler every time irradiation is performed, which saves the operator's manpower.

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

[0052] like Figure 4 The placement slot 301 shown opens upward, and the sample box 11 located on the placement plate 1 can fall downward into the placement slot 301 after entering the sample storage box 3 under the push of the telescopic sample pushing mechanism 4. The opening direction of the placement slot 301 is not Figure 3 The structure shown is a limitation, and other directions are also possible. For example, the opening of the placement slot 301 faces the telescopic sample pushing mechanism 4, and the sample box 11 is directly pushed into the placement slot 301 by the telescopic sample pushing mechanism 4.

[0053] Continue to refer to Figure 4 The working end of the telescopic sample pushing mechanism 4 extends into the sample storage mechanism 2 , and can push the sample box 11 located on the placement plate 1 into the placement slot 301 .

[0054] When irradiation is required, the working end of the telescopic sample pushing mechanism 4 moves toward the location of the sample storage box 3, pushing the sample box 11 that comes out of 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 sample pushing work is completed, the working end of the telescopic sample pushing 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 the sample box 11 needs to be pushed into the placement slot 301, the opening of the placement slot 301 is in an open state. After the telescopic sample pushing mechanism 4 pushes the sample box 11 into the placement slot 301, the working end of the telescopic sealing mechanism 5 moves toward the location of the placement slot 301 until the opening of the placement slot 301 is closed to prevent airflow from flowing out of the opening of the placement slot 301, so that the sample box 11 can move normally in the conveying pipe 10. When one of the sample boxes 11 is transported, the working end of the telescopic sealing mechanism 5 moves away from the placement slot 301, and the opening of the placement slot 301 is opened, so that the next sample box 11 can smoothly enter the placement slot 301.

[0057] Reference Figure 4 , the opening of the placement slot 301 is upward, and the telescopic sealing mechanism 5 is located above the placement slot 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 of the placement slot 301; for example, Figure 3 In the orientation shown, the telescopic sealing mechanism 5 can also be located on the right side of the placement slot 301 , and 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 slot 301 .

[0058] When the multi-sample injector provided in this embodiment is working, first the sample discharging mechanism releases a sample box 11 on the placement plate 1, then the telescopic sample pushing mechanism 4 pushes the sample box 11 on the placement plate 1 into the placement slot 301 of the sample storage box 3, and finally the telescopic sealing mechanism 5 seals the opening of the placement slot 301, and an airflow thrust is generated in the delivery pipe 10 to push the sample box 11 into the reactor for irradiation; when the next irradiation is performed, the above working process is repeated. Therefore, the multi-sample injector can allow the operator to place multiple sample boxes 11 at a time, and can automatically place one sample box 11 into the delivery pipe 10 each time, without having to place a sample box 11 each time for irradiation, thereby 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, and the sample pushing member 402 can move toward or away from the placement slot 301 under the drive of the first telescopic member 401.

[0060] The first telescopic member 401 can be an electric push rod, which can be telescopic in its own length direction. Of course, the first telescopic rod can also be other structural forms such as a hydraulic cylinder, a cylinder, etc.

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

[0062] When the sample box 11 on the placement plate 1 needs to be pushed into the placement slot 301, the first telescopic member 401 is extended, and the working end of the first telescopic member 401 drives the sample 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 is shortened, and the working end of the first telescopic member 401 drives the sample pusher 402 to move away from the placement slot 301, until the sample pusher 402 returns to the initial position of pushing the sample box 11.

[0063] Continue to refer to Figure 6 The sample pusher 402 is provided with a receiving 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 hole 403, and the inner wall of the receiving hole 403 can limit the movement of the sample box 11, preventing the sample box 11 from the sample storage mechanism 2 from moving freely on the placement plate 1.

[0064] By setting the relative distance between the telescopic sample pushing mechanism 4 and the sample storage mechanism 2, and the telescopic distance of the first telescopic member 401, when the first telescopic member 401 is shortened and drives the sample pushing member 402 back to the initial position, the accommodating through hole 403 can be aligned with the position where the sample storage mechanism 2 releases the sample box 11; and when the first telescopic member 401 is extended and drives the sample pushing member 402 to extend a preset distance, the accommodating through hole 403 can be aligned with the opening of the placement groove 301.

[0065] In this embodiment, refer to Figure 1 and Figure 2 The embodiment of the present application further includes a bottom plate 6 and a first bracket 7, the first bracket 7 is disposed on the bottom plate 6, and the telescopic sample pushing mechanism 4 is connected to the first bracket 7. When the telescopic sample pushing mechanism 4 is of the above structure, the end of the first telescopic member 401 away from the sample pushing member 402 is connected to the first bracket 7.

[0066] In this embodiment, refer to Figure 7 The telescopic sealing mechanism 5 includes a second telescopic member 501 and a pressure cover 502. The pressure cover 502 is connected to the working end of the second telescopic member 501, and the pressure cover 502 moves toward or away from the placement groove 301 under the drive of the second telescopic member 501.

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

[0068] like Figure 7 The working end of the second telescopic member 501 is connected to the gland 502 via a pin. Of course, in other embodiments, the working end of the second telescopic member 501 is welded to the gland 502.

[0069] When the sample pusher 402 pushes the sample box 11 into the placement hole, the second telescopic member 501 extends, and the working end of the telescopic member drives the pressure cover 502 to move in a direction close to the opening of the placement slot 301, until the pressure cover 502 closes the opening of the placement slot 301, so that the placement slot 301 is isolated from the outside. After the sample box 11 is transported to the reactor by the airflow in the transport pipeline 10, the second telescopic member 501 shortens, and the working end of the telescopic member drives the pressure cover 502 to move in a direction away from the opening of the placement slot 301, so that the opening of the placement slot 301 is opened, so as to allow the telescopic sample pusher mechanism 4 to push the next sample box 11 into the placement slot 301.

[0070] Figure 7 Detailed structure of the gland 502. The gland 502 includes 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 groove 301 and fit the inner wall of the placement groove 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 gland 502 closes the opening of the placement groove 301, the outer side of the sealing block 5022 fits the inner wall of the placement groove 301, and the baffle 5021 presses the gasket 5023 against the edge of the placement groove 301. The gland 502 works together with the gasket 5023 and the sealing block 5022 to isolate the placement groove 301 from the outside, thereby preventing airflow leakage in the delivery pipeline 10.

[0073] Continue to refer to Figure 7 The bottom surface of the placement groove 301 and the bottom surface of the sealing block 5022 are both set as arc surfaces, forming an inner wall surface adapted to the sample box 11. Specifically, the inner wall surrounded by the bottom surface of the placement groove 301 and the bottom surface of the sealing block 5022 is a cylindrical surface. Figure 5 The outer side surface of the sample box 11 shown is fitted together, which avoids 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, thereby affecting the transportation of the sample box 11, and ensures that the airflow in the transportation pipeline 10 can push the sample box 11 in the placement groove 301.

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

[0075] like Figures 1 to 4 As shown, the sample storage mechanism 2 is disposed 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, if Figure 5 As shown, the sample storage mechanism 2 includes a sample storage cylinder 201, a slide rail 202 and a slide 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 slide rail 202 is arranged at the top of the sample storage cylinder 201 in a horizontal direction; the slide cover 203 is slidably connected to the slide 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 to place 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.

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

[0079] When it is necessary to place a sample box 11 in the sample storage mechanism 2, the slide cover 203 is slid along the slide rail 202 to keep the slide cover 203 away from the opening at the top of the sample storage cylinder 201. After the opening at the top of the sample storage cylinder 201 is opened, the operator places multiple sample boxes 11 in the sample storage cylinder 201 in sequence according to a pre-set irradiation sequence. The multiple sample boxes 11 in the sample storage cylinder 201 are arranged in the height direction, such as Figure 5 shown.

[0080] Continue to refer to Figure 5 The sample storage mechanism 2 further comprises a door 204, and the sample storage cylinder 201 is provided with an outlet toward 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 provided 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 rotated around the hinge to open and close; when the door 204 is closed, the outlet is covered. When the sample box 11 placed in the sample storage cylinder 201 needs to be observed, the door 204 can be opened for observation.

[0082] In this embodiment, the sample storage box 3 is provided with a first mounting hole 305 and a second mounting hole 3046 which are connected to the placement slot 301, and the first mounting hole 305 and the second mounting hole 3046 are coaxially arranged. The multi-sample injector further includes two opposing beam sensors 9; the two opposing beam sensors 9 are respectively installed in the first mounting hole 305 and the second mounting hole 3046 to detect the sample box 11 in the placement slot 301.

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

[0084] Reference Figure 2 and Figure 4 The sample storage box 3 includes a shell a302 and a shell b303. The shell a302 is connected to the shell b303, the placement plate 1 is connected to the shell b303, and the top surface of the placement plate 1 is flush with the top surface of the shell b303. The side of the shell a302 facing the sample storage mechanism 2 is provided with a sample pushing channel, and the sample pushing channel is used for the working end of the telescopic sample pushing mechanism 4 and the sample box 11 to pass through. Among them, the placement groove 301 is arranged in the shell b303, and the opening of the placement groove 301 faces upward, and the telescopic sealing mechanism 5 is located above the placement groove 301; the first mounting hole 305 and the second mounting hole 3046 are also arranged in the shell b303.

[0085] like Figure 2 As shown, the sample storage box 3 further includes an observation window 304, which is disposed on the housing a302. The operator can observe through the observation window 304 whether the telescopic sample pushing mechanism 4 pushes the sample box 11 into the placement slot 301.

[0086] Embodiment 2

[0087] Different from the first embodiment, in this embodiment, at least one annular groove is provided on the side wall of the sealing block 5022, and a sealing ring is arranged in each annular groove, and the sealing ring fits the inner wall of the placement groove 301 for dynamic sealing; when the telescopic sample pushing mechanism 4 pushes the sample box 11 into the placement groove 301, the working end of the second telescopic member 501 drives the sealing block 5022 to move toward the placement groove 301, and when the sealing block 5022 extends into the placement groove 301, the sealing ring is tightly attached to the inner wall of the placement groove 301, thereby achieving the closure of the opening of the placement groove 301.

[0088] The above description is only a specific embodiment of the present invention, and a comparison of the effects of the specific embodiments and the related comparative examples, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A multi-sample injector for a pneumatic conveying system, characterized in that: It comprises 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 bottom plate (6), a first bracket (7) and a second bracket (8); The base plate (6) is fixedly connected to a first bracket (7) and a sample storage box (3); The sample storage mechanism (2) is a rectangular cylindrical structure with an open upper end, and is used to store a sample box (11). The lower end side walls of the sample storage mechanism (2) are provided with push-in holes, and the lower end is fixedly connected to one side of a placement plate (1). One end of the placement plate (1) is fixedly connected to a 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). The sample storage box (3) is provided with a sample pushing channel at a position opposite to the pushing hole, and the sample storage box (3) is provided with a placement groove (301) for placing the sample box (11); The fixed end of the telescopic sample pushing mechanism (4) is connected to the first bracket (7), and the working end passes through the pushing 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 groove (301); The fixed end of the telescopic sealing mechanism (5) is connected to the outer wall of the sample storage mechanism (2) via the second bracket (8), and the working end corresponds to and can be movably extended 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) comprises a sample storage cylinder (201), a slide rail (202) and a slide cover (203); The sample storage cylinder (201) is a rectangular cylindrical structure with openings at both ends, and is used to store a plurality of sample boxes (11). The lower side walls of the sample storage cylinder (201) are provided with push-in holes, and the lower end is connected to the placement plate (1). The upper end of the sample storage cylinder (201) is connected to the slide rail (202) by screws or welding, and the slide cover (203) is slidably connected to the slide rail (202); The outer wall of the sample storage tube (201) is connected to the fixed end of the telescopic sealing mechanism (5) through the second bracket (8), the outer wall of the lower end of the sample storage tube (201) is in contact with the outer wall of the sample storage box (3), and the push-in hole is arranged opposite to the sample pushing 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) is provided with an outlet on the side facing the telescopic sample pushing mechanism (4), and a hinged door (204) is provided on the sample storage cylinder (201) at the outlet for covering the outlet.

4. The multi-sample injector for a pneumatic conveying system according to claim 2, characterized in that: The sample storage box (3) comprises a shell a (302) and a shell b (303), wherein 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 provided on one side of the shell a (302) where it is connected to the shell b (303); the outer wall of the shell a (302) is closely connected to the sample storage cylinder (201); a through hole is vertically provided in the shell a (302) and communicates with the sample pushing channel; and an observation window (304) is also connected to one side of the shell a (302); The housing b (303) is provided with the placement groove (301) communicating with the through hole, the outer wall of the housing b (303) is connected to the end of the placement plate (1), and the upper surface of the placement plate (1) is flush with the bottom of the sample pushing channel, and the working end of the telescopic sealing mechanism (5) passes through the through hole of the housing a (302) and extends into the placement groove (301); The housing b (303) is provided with a first mounting hole (305) and a second mounting hole (306) on both sides of the placement slot (301), and a through-beam sensor (9) is provided in the first mounting hole (305) and the second mounting hole (306) for detecting whether there is a sample box (11) in the placement slot (301); The housing b (303) is provided with a conveying channel along the length direction of the placement slot (301), and the outer wall of the sample storage box (3) is connected to a conveying pipe (10) coaxial with the conveying channel, so as to convey the sample box (11) in the placement slot (301) out through airflow.

5. The multi-sample injector for a pneumatic conveying system according to claim 1, characterized in that: The telescopic sample pushing mechanism (4) comprises a first telescopic member (401) and a sample pushing member (402), wherein the movable end of the first telescopic member (401) is connected to the sample pushing member (402) by a pin or by welding; The fixed end of the first telescopic member (401) is connected to the first bracket (7); The sample pushing member (402) passes through the pushing hole and can extend into the sample storage mechanism (2). The sample pushing member (402) is used to push the sample box (11) to move into the placement groove (301).

6. The multi-sample injector for a pneumatic conveying system according to claim 5, characterized in that: The sample pushing member (402) is provided with a receiving through hole (403), and the receiving through hole (403) is used for positioning and receiving the sample box (11).

7. The multi-sample injector for a pneumatic conveying system according to claim 4, characterized in that: The telescopic sealing mechanism (5) comprises a second telescopic member (501) and a pressure cover (502); the movable end of the second telescopic member (501) is connected to the pressure cover (502) by a pin or welding; the fixed end of the second telescopic member (501) is connected to the outer wall of the sample storage cylinder (201) in the sample storage mechanism (2) through a second bracket (8); the pressure cover (502) is a working end, corresponding to and extending into the placement groove (301); The movement range of the pressure cover (502) is from the through hole of the housing a (302) to the placement groove (301), and is used to seal the sample box (11) in the placement groove (301).

8. The multi-sample injector for a pneumatic conveying system according to claim 7, characterized in that: The gland (502) comprises a baffle (5021), a sealing block (5022) and a gasket (5023); One side of the baffle (5021) is connected to the movable end of the second telescopic member (501) by a pin or welded, and the other side of the baffle (5021) is connected to the gasket (5023) and the sealing block (5022) in sequence. The bottom surface of the sealing block (5022) is a concave arc surface and is used to fit with the surface of the sample box (11). When the side wall of the sealing block (5022) moves, it fits with the inner wall of the placement groove (301).

9. The multi-sample injector for a pneumatic conveying system according to claim 8, characterized in that: At least one annular groove is formed on the side wall of the sealing block (5022), and a sealing ring is arranged in each annular groove. The sealing ring fits against the inner wall of the placement groove (301) for dynamic sealing.

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