Metal mixed standard solution vacuum dispensing device

Abstract

The application discloses a kind of metal mixed standard solution vacuum subpackaging device, belong to metal solution subpackaging technical field, it includes: base, vertical fixed with rack above it, transverse fixed with beam frame on rack;The upper end surface of base is equipped with conveying rail, and conveying rail is equidistantly arranged with several slidingly arranged carriers;Vacuum cover is vertically slidably connected through slide bar below beam frame;Liquid injection unit is fixed in the vacuum cover and arranged vertically;The vacuum cover used in the application can be sealed with the base to form a vacuum environment during the subpackaging of metal mixed standard solution. During the subpackaging process, each subpackaging tank moves with the carrier and slides to the bottom of each liquid pipe of the liquid injection unit, so that each metal solution in the liquid pipe can be injected into the subpackaging tank. The subpackaging tank can be circulated through the conveying rail once or multiple times to inject liquid, so that different concentrations of metal solutions can be added one by one to form a uniform concentration gradient distribution, avoiding excessive stratification caused by density difference.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal solution dispensing, and specifically relates to a metal mixed standard solution vacuum dispensing device. BACKGROUND

[0002] Metal mixed standard solutions are widely used in the fields of analytical chemistry, material science and environmental monitoring, and the like, and need to meet the requirements of high precision, high uniformity, pollution prevention and the like in the dispensing process. In traditional technologies, a fixed liquid injection head is often used, and a dispensing tank is moved by a mechanical arm, which leads to low efficiency. Some metal solutions (such as those containing sulfides or easily oxidizable components) need to be operated in an oxygen-free environment, but the existing dispensing equipment is mostly of an open structure, and it is difficult to meet the environmental requirements of dispensing. In addition, if the density difference of the components of the metal mixed standard solution is large, the metal mixed standard solution is pre-prepared and then injected in one time, and the stratification before injection is caused due to the gravity, which leads to the deviation of the dispensing proportion of the metal solutions and affects the accuracy of subsequent use or detection.

[0003] Therefore, it is necessary to provide a metal mixed standard solution vacuum dispensing device to solve the problems in the background. SUMMARY

[0004] To achieve the above-mentioned purpose, the application provides the following technical scheme: a metal mixed standard solution vacuum dispensing device, comprising: a base, a vertical frame is fixed above the base, and a cross beam frame is transversely fixed on the frame; a conveying rail is installed on the upper end surface of the base, a plurality of slide-mounted carriers are equidistantly arranged on the conveying rail, and a positioning structure suitable for a standard dispensing tank is arranged in each carrier; a vacuum cover is vertically and slidably connected to the lower side of the cross beam frame through a slide rod, a sealing ring is arranged on the bottom of the vacuum cover and matched with the surface of the base; an electric lifting rod is vertically fixed on the cross beam frame, and the output end of the electric lifting rod is connected with the vacuum cover; a liquid injection unit is fixed in the vacuum cover in a vertical manner, a plurality of solution storage tanks are arranged along the side wall of the frame on the upper end surface of the base, a delivery pipe is connected to the liquid outlet of each solution storage tank, and the other end of the delivery pipe penetrates through the vacuum cover and is connected with the liquid injection unit.

[0005] Preferably, a vacuum pump is installed on one side of the frame, the vacuum pump is connected with the vacuum cover through a corrugated pipe, the conveying rail is configured as an oval closed loop track structure, the long axis direction of the conveying rail is parallelly distributed with a tank conveying track and a tank taking track, one end of each of the tank conveying track and the tank taking track is connected with the conveying rail, and a sorting mechanical arm is arranged on the corresponding side of the tank conveying track and the tank taking track outside the base.

[0006] As preferred, the upper end surface of the machine base is fixed with a pneumatic sealing mechanism within the vacuum cover area, which is used for axial cap sealing of the port of the split charging can, and the split charging can on the carrier is at least circulated once for liquid filling along the conveying rail.

[0007] As preferred, the liquid filling unit comprises a fixed plate vertically fixed in the vacuum cover, and a plurality of liquid pipes are arranged on both side end surfaces of the fixed plate, and a liquid inlet seat is connected below each liquid pipe, and a rotating pipe is connected outside the liquid inlet seat, and the rotating pipe is connected in communication with the conveying pipe; an inner connecting pipe is coaxially fixed in the liquid pipe, a piston is slidingly connected in the inner connecting pipe, and a sealing shaft is fixed at the lower end surface of the inner connecting pipe, an inlet channel is vertically arranged in the sealing shaft, and the inlet channel is in communication with the annular structure cavity in the liquid inlet seat; a straight flow pipe is vertically connected below the liquid pipe, and a liquid guide pipe is vertically connected in the straight flow pipe, and the upper end of the liquid guide pipe is connected in the sealing shaft.

[0008] As preferred, a sliding frame is vertically fixed on one side of the upper end surface of the liquid pipe, a sliding block is slidingly connected on the sliding frame through threads, and the sliding block is connected with the upper end of the piston through a support.

[0009] As preferred, an annular outer cavity is formed between the inner connecting pipe and the liquid pipe, a plurality of convex edge plates are axially connected on the circumferential outer wall of the inner connecting pipe, and a push plug is slidingly connected between the convex edge plates; a one-way inlet hole is arranged below each push plug on the side wall of the inner connecting pipe; a guide cavity is arranged in the sealing shaft, a plurality of bypass holes are distributed on the outer circumference of the guide cavity, and a one-way outlet hole is arranged below the one-way inlet hole on the side wall of the inner connecting pipe, which is opposite to the bypass hole.

[0010] As preferred, the upper end of the straight flow pipe is in communication with the guide cavity.

[0011] As preferred, a connecting rod is connected to the upper end of each push plug, an adjusting ring is rotatably installed on one side of the sliding frame and above the coaxial liquid pipe, a guide sleeve is slidingly connected outside the adjusting ring, and each connecting rod is connected with the guide sleeve; a corrugated groove is arranged on the inner wall of the guide sleeve, and an axle pin is fixed on the adjusting ring, and the axle pin is slidingly connected with the corrugated groove.

[0012] As preferred, an electric control damper is installed at the upper end of the connecting rod, and the electric control damper provides different intensity elastic support under voltage adjustment.

[0013] Compared with the prior art, the beneficial effects of the present application are that: the vacuum cover adopted in the present application can be sealingly matched with the machine base to construct a vacuum environment in the metal mixed standard solution dispensing, and a plurality of carriers are distributed in the conveying rail on the machine base, each carrier can temporarily fix a single dispensing canister, which facilitates to keep the stability of the dispensing canister during the metal mixed standard solution dispensing, wherein, during the dispensing process, each dispensing canister is slid to below each liquid pipe of the liquid injection unit along with the movement of the carrier, so that the corresponding metal solution of the liquid pipe is injected into the dispensing canister, and for the dispensing of the metal mixed standard solution which is prone to stratification, the dispensing canister can be circulated for one or more times to inject liquid, so as to sequentially superimpose metal solutions of different concentrations to form a uniform concentration gradient distribution, thereby avoiding the excessive stratification phenomenon caused by the density difference; and a liquid guide pipe and a direct current pipe are arranged below each liquid pipe, the liquid guide pipe can quickly inject the metal solution into the dispensing canister when the piston slides downward, and when a certain injection amount is reached, the metal solution can be injected in a pulse manner in a small amount by the high-frequency reciprocating sliding of each push plug, thereby avoiding the tailing phenomenon of the metal solution and improving the liquid injection dispensing precision. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0015] Figure 2 It is a schematic diagram of the structure of the conveying rail in the present application;

[0016] Figure 3 It is a schematic diagram of the internal structure of the vacuum cover in the present application;

[0017] Figure 4 It is a schematic diagram of the structure of the liquid injection unit in the present application;

[0018] Figure 5 It is Figure 4 It is an enlarged schematic diagram of structure A in the present application;

[0019] Figure 6 It is an assembly diagram of the adjusting ring and the guide sleeve in the present application;

[0020] Figure 7 It is a schematic diagram of the structure of the inner connecting pipe in the present application;

[0021] In the figure: 1, base; 11, frame; 12, electric lifting rod; 13, solution storage tank; 14, conveying pipe; 15, vacuum pump; 2, conveying rail; 21, tank feeding rail; 22, tank taking rail; 23, carrier; 24, pneumatic capping mechanism; 3, vacuum cover; 31, fixed plate; 32, sliding block; 33, adjusting ring; 34, guide sleeve; 4, liquid injection unit; 41, liquid pipe; 42, liquid inlet seat; 43, rotating pipe; 44, piston; 45, straight pipe; 46, liquid guide pipe; 5, inner connecting pipe; 51, convex edge plate; 52, push plug; 53, one-way inlet hole; 54, one-way outlet hole; 55, connecting rod; 56, electric control damper; 6, sealing shaft; 61, liquid inlet channel; 62, bypass hole. DETAILED DESCRIPTION

[0022] Please refer to Figures 1-7 In the embodiment of the present application, a metal mixed standard solution vacuum dispensing device comprises a base 1, a frame 11 vertically fixed above the base 1, and a cross beam fixed horizontally on the frame 11; a conveying rail 2 is installed on the upper end surface of the base 1, and a plurality of carrier seats 23 are equidistantly arranged on the conveying rail 2, each of which is provided with a positioning structure adapted to a standard dispensing tank, wherein the positioning structure can be a V-shaped groove with spring clamps to adapt to standard tanks with different diameters.

[0023] A vacuum cover 3 is vertically and slidingly connected to the lower part of the cross beam through a slide rod, the bottom of the vacuum cover 3 is provided with a sealing ring matched with the surface of the base 1, so as to provide a vacuum liquid injection environment in the metal mixed standard solution dispensing; and an electric lifting rod 12 is vertically fixed on the cross beam, and the output end of the electric lifting rod 12 is connected with the vacuum cover 3.

[0024] A liquid injection unit 4 is fixed vertically in the vacuum cover 3, and a plurality of solution storage tanks 13 are arranged along the side wall of the frame 11 on the upper end surface of the base 1, each of which stores a different metal solution, and the liquid outlet of each solution storage tank 13 is connected with a conveying pipe 14, the other end of the conveying pipe 14 penetrates through the vacuum cover 3 and is connected with the liquid injection unit 4.

[0025] In this embodiment, a vacuum pump 15 is installed on one side of the frame 11, and the vacuum pump 15 is connected with the vacuum cover 3 through a corrugated conduit.

[0026] The conveying track 2 is configured as an elliptical closed loop track structure, wherein the arc-shaped sections of the conveying track 2 can be designed with variable curvatures, so that when the sub-packaged cans on the carriers 23 accelerate through the arc-shaped sections, non-uniform accelerations are generated due to the change of path curvatures, the solutions in the cans are subjected to inertial forces and centrifugal forces to form shear flow, which can further break the agglomeration of the solutions, and the long axis direction of the conveying track 2 is parallel to the can feeding track 21 and the can taking track 22, one end of the can feeding track 21 and the can taking track 22 is connected with the conveying track 2, and a sorting mechanical arm is arranged on the corresponding side of the can feeding track 21 and the can taking track 22 outside the base 1; that is, during the sub-packaging process, a plurality of sub-packaged cans are arranged on the can feeding track 21, and the sorting mechanical arm sequentially sorts the sub-packaged cans to the carriers 23 (the carriers 23 stop after sliding along the conveying track 2 to a position near the can feeding track 21), and when each carrier 23 corresponds to one sub-packaged can, the vacuum cover 3 is controlled to slide downward by the electric lifting rod 12 to provide a vacuum liquid injection environment, and then the liquid injection unit 4 injects liquid into each sub-packaged can, and after the liquid injection is completed, the sub-packaged cans can be sequentially sorted to the can taking track 22 by the sorting mechanical arm.

[0027] As a preferred embodiment, the upper end surface of the base 1 is fixed with a pneumatic sealing mechanism 24 in the coverage area of the vacuum cover 3, the pneumatic sealing mechanism 24 is used for axially sealing the sub-packaged cans, and the sub-packaged cans on the carriers 23 at least pass through the conveying track 2 once for cyclic liquid injection filling, so that cyclic liquid injection sub-packaging of each sub-packaged can can be realized, different metal solutions can be layered or alternately injected, so that different concentrations of solutions can be sequentially superimposed, and finally a uniform concentration gradient distribution is formed in the sub-packaged cans, the sub-packaging uniformity of the metal mixed standard solution is improved, and the sub-packaging precision is further improved.

[0028] In this embodiment, the liquid injection unit 4 includes a fixed plate 31 which is vertically fixed in the vacuum cover 3, the two side end surfaces of the fixed plate 31 are arranged with a plurality of liquid pipes 41, the lower side of each liquid pipe 41 is connected with a liquid inlet seat 42, the outer side of the liquid inlet seat 42 is connected with a rotating pipe 43, and the rotating pipe 43 is connected in communication with the conveying pipe 14, that is, the metal solutions in each solution storage tank 13 can enter the rotating pipe 43 through the conveying pipe 14, and then flow into the liquid inlet seat 42.

[0029] The inner pipe 5 is coaxially fixed in the liquid pipe 41, the piston 44 is slidably connected in the inner pipe 5, the lower end surface of the inner pipe 5 is fixed with the sealing shaft 6, the sealing shaft 6 is vertically provided with the liquid inlet channel 61, the liquid inlet channel 61 is communicated with the annular cavity in the liquid inlet seat 42; the straight flow pipe 45 is vertically connected below the liquid pipe 41, the liquid guide pipe 46 is vertically connected in the straight flow pipe 45, the upper end of the liquid guide pipe 46 is connected in the sealing shaft 6, the metal solution can be unidirectionally flowed into the inner pipe 5 through the liquid inlet channel 61, and then discharged through the liquid guide pipe 46 below the liquid pipe 41.

[0030] In the embodiment, the upper end surface of the liquid pipe 41 is vertically fixed with the sliding frame, the sliding block 32 is threadedly and slidably connected on the sliding frame, and the sliding block 32 is connected with the upper end of the piston 44 through the support.

[0031] In the embodiment, the inner pipe 5 and the liquid pipe 41 are sealed to form the annular outer cavity, a plurality of convex edge plates 51 are axially connected on the outer circumferential wall of the inner pipe 5, and the push plug 52 is slidably connected between the convex edge plates 51; the one-way inlet hole 53 is formed below each push plug 52 on the side wall of the inner pipe 5, the push plug 52 can be axially slid along the inner pipe 5, and the metal solution in the inner pipe 5 is pumped into the annular outer cavity through the one-way inlet hole 53; the guide cavity is arranged in the sealing shaft 6, a plurality of bypass holes 62 are distributed on the outer circumference of the guide cavity, the one-way outlet hole 54 is formed below the one-way inlet hole 53 on the side wall of the inner pipe 5 and is opposite to the bypass hole 62, so that the metal solution in the annular outer cavity can enter the guide cavity through the one-way outlet hole 54.

[0032] As a preferred embodiment, the upper end of the straight flow pipe 45 is communicated with the guide cavity, so that the metal solution in the guide cavity is discharged through the straight flow pipe 45.

[0033] In the embodiment, the upper end of the push plug 52 is connected with a connecting rod 55, one side of the sliding frame and above the coaxial of the liquid pipe 41 is rotatably installed with an adjusting ring 33, the adjusting ring 33 is slidably connected with a guide sleeve 34, and each connecting rod 55 is connected with the guide sleeve 34; the inner wall of the guide sleeve 34 is provided with a corrugated groove, and the adjusting ring 33 is fixed with a shaft pin, and the shaft pin is slidably connected with the corrugated groove. When the adjusting ring 33 is driven to rotate by the external motor through the gear meshing effect, it can drive the guide sleeve 34 to high-frequency reciprocate up and down through the sliding action of the shaft pin and the corrugated groove. At this time, each push plug 52 below the guide sleeve 34 can slide synchronously with the connecting rod 55, so as to pump the metal solution in the inner connecting pipe 5 into the annular outer cavity, and discharge it through the direct current pipe 45 by the one-way hole 54, so as to realize the pulse injection effect of the metal solution. Especially when the metal solution sub-packaging residual amount is less than 10%, the micro-pulse mode injection can effectively avoid liquid drop tailing, and realize high-precision metal solution sub-packaging.

[0034] In the embodiment, the upper end of the connecting rod 55 is installed with an electric control damper 56, and the electric control damper 56 provides different intensity elastic support under voltage adjustment, so that the effective stroke of each push plug 52 below the connecting rod 55 can be changed when the guide sleeve 34 slides in the axial direction, and the injection amount in the overall micro-pulse mode is adjusted (for example: voltage rise→magnetorheological fluid solidification degree increases→damper stiffness increases→damper compression degree approaches zero→push plug 52 stroke increases), so as to further improve the injection precision in the micro-pulse mode.

[0035] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A vacuum dispensing device for metal mixed standard solution, characterized in that, It includes: The base (1) is vertically fixed with a rack (11) above, and the rack (11) is transversely fixed with a beam frame; the upper end surface of the base (1) is provided with a conveying rail (2), and a plurality of slideably arranged carriers (23) are equidistantly arranged on the conveying rail (2); each carrier (23) is provided with a positioning structure matched with a standard sub-packaging tank; The lower side of the beam frame is vertically and slidably connected with a vacuum cover (3) through a slide rod, the bottom of the vacuum cover (3) is provided with a sealing ring matched with the surface of the base (1); and an electric lifting rod (12) is vertically fixed on the beam frame, and the output end of the electric lifting rod (12) is connected with the vacuum cover (3); The vacuum cover (3) is fixedly provided with a vertical liquid injection unit (4), and a plurality of solution storage tanks (13) are arranged along the side wall of the rack (11) on the upper end surface of the base (1); the discharge port of each solution storage tank (13) is connected with a conveying pipe (14), one end of the conveying pipe (14) penetrates through the vacuum cover (3) and is connected with the liquid injection unit (4); The sub-packaging tank is injected with liquid for one or more cycles to gradually superimpose metal solutions of different concentrations to form a uniform concentration gradient distribution; The liquid injection unit (4) comprises a fixed plate (31) vertically fixed in the vacuum cover (3), a plurality of liquid pipes (41) are arranged on the two side end surfaces of the fixed plate (31), a liquid inlet seat (42) is connected below each liquid pipe (41), a rotating pipe (43) is connected outside the liquid inlet seat (42), and the rotating pipe (43) is connected in communication with the conveying pipe (14); A inner connecting pipe (5) is coaxially fixed in the liquid pipe (41), a piston (44) is slidably connected in the inner connecting pipe (5), a sealing shaft (6) is fixed to the lower end surface of the inner connecting pipe (5), a liquid inlet channel (61) is vertically formed in the sealing shaft (6), and the liquid inlet channel (61) is in communication with the annular structure cavity in the liquid inlet seat (42); A straight pipe (45) is vertically connected below the liquid pipe (41), a liquid guide pipe (46) is vertically connected in the straight pipe (45), and the upper end of the liquid guide pipe (46) penetrates and is connected in the sealing shaft (6); The inner connecting pipe (5) and the liquid pipe (41) form an annular outer cavity in seal, a plurality of convex edge plates (51) are axially connected on the circumferential outer wall of the inner connecting pipe (5), and a push plug (52) is slidably connected between the convex edge plates (51); A one-way inlet hole (53) is formed in the side wall of the inner connecting pipe (5) below each push plug (52); A guide cavity is formed in the sealing shaft (6), a plurality of bypass holes (62) are distributed on the outer circumference of the guide cavity, and a one-way discharge hole (54) is formed in the side wall of the inner connecting pipe (5) below the one-way inlet hole (53) and opposite the bypass hole (62); The upper end of the straight pipe (45) is in communication with the guide cavity.

2. The vacuum dispensing device for metal mixed standard solution according to claim 1, characterized in that, A vacuum pump (15) is mounted on one side of the rack (11), and the vacuum pump (15) is in communication with the vacuum cover (3) through a corrugated conduit. The conveying rail (2) is configured as an elliptical closed loop track structure, and the long axis direction of the conveying rail (2) is parallel to the distribution of the can feeding rail (21) and the can taking rail (22), one end of the can feeding rail (21) and the can taking rail (22) is connected with the conveying rail (2), and the corresponding side of the can feeding rail (21) and the can taking rail (22) outside the base (1) is provided with a sorting mechanical hand.

3. The vacuum dispensing device for metal mixed standard solution according to claim 1, characterized in that, The upper end surface of the base (1) is fixed with a pneumatic cover mechanism (24) in the covering area of the vacuum cover (3), the pneumatic cover mechanism (24) is used for axial cap sealing of the split can port, and the split can on the carrier (23) at least circulates once along the conveying rail (2) for liquid filling.

4. The vacuum dispensing device for metal mixed standard solution according to claim 1, characterized in that, The upper end surface of the liquid pipe (41) is vertically fixed with a sliding frame, the sliding frame is threadedly and slidably connected with a sliding block (32), and the sliding block (32) is connected with the upper end of the piston (44) through a support.

5. The metal mixed solution vacuum dispensing device according to claim 4, characterized in that, The upper end of the push plug (52) is connected with a connecting rod (55), one side of the sliding frame and above the coaxial liquid pipe (41) is rotatably installed with an adjusting ring (33), the adjusting ring (33) is slidably connected with a guide sleeve (34), and each connecting rod (55) is connected with the guide sleeve (34). The inner wall of the guide sleeve (34) is provided with a corrugated groove, and the adjusting ring (33) is fixed with a shaft pin, and the shaft pin is slidably connected with the corrugated groove.

6. The metal mixed solution vacuum dispensing device according to claim 5, characterized in that, The upper end of the connecting rod (55) is provided with an electric control damper (56), and the electric control damper (56) provides elastic support of different intensity under voltage regulation.

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