CN112525617A - Chemical product production device capable of sampling in time - Google Patents
Chemical product production device capable of sampling in time Download PDFInfo
- Publication number
- CN112525617A CN112525617A CN202011298993.7A CN202011298993A CN112525617A CN 112525617 A CN112525617 A CN 112525617A CN 202011298993 A CN202011298993 A CN 202011298993A CN 112525617 A CN112525617 A CN 112525617A
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- connecting box
- rod
- sampling
- ring
- wall
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- 239000000126 substance Substances 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000005070 sampling Methods 0.000 title claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 230000000694 effects Effects 0.000 claims description 4
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 5
- 241000282414 Homo sapiens Species 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000003889 chemical engineering Methods 0.000 description 2
- 238000001311 chemical methods and process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
- G01N1/2035—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials by deviating part of a fluid stream, e.g. by drawing-off or tapping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/04—Methods of, or means for, filling the material into the containers or receptacles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1031—Sampling from special places
Abstract
The invention belongs to the field of sampling devices, in particular to a chemical product production device capable of sampling in time, which aims at the problem that two ends of the existing conveying pipeline are fixedly connected in a sealing way, and chemical reagents are often difficult to obtain when the chemical reagents need to be collected in the period, the invention provides a scheme which comprises a connecting box, wherein the conveying pipelines are fixedly arranged on the inner walls of the two sides of the connecting box in a sealing way, the mutually far ends of the two conveying pipelines extend to the two sides of the connecting box respectively, a movable plate is connected in the connecting box in a sealing way in a sliding way, two connecting rods are symmetrically connected on the inner wall of the bottom of the connecting box in a sliding way, and are in transmission connection with the movable plate, the flow direction of the chemical products can be adjusted, the collecting cup can be stably connected, so that the chemical products can be quickly collected and sampled, and the operation is convenient, therefore, the utility model has good practicability.
Description
Technical Field
The invention relates to the technical field of sampling devices, in particular to a chemical product production device capable of sampling in time.
Background
Chemical industry is short for "chemical process", "chemical industry", "chemical engineering", and the like. The technology of changing the composition and structure of substances or synthesizing new substances by chemical methods belongs to the chemical production technology, namely the chemical process, and the obtained products are called chemicals or chemical products. Originally, the production of such products was performed in manual workshops, later developed into factories, and gradually developed into a specific production industry, i.e., the chemical industry. Chemical engineering is a science for researching the general rule of the production process of chemical products. The relationship between human beings and chemical industry is very close, and some chemical products play epoch-making important roles in the development history of human beings, and the production and the application of the chemical products even represent a certain history stage of human civilization.
At present, liquid chemical reagents are conveyed generally by adopting a conveying pipeline, but both ends of the existing conveying pipeline are in sealing fixed connection, and the chemical reagents are difficult to obtain when needing to be collected, so that a chemical product production device capable of sampling in time is provided for solving the problem.
Disclosure of Invention
Based on the technical problem that the two ends of the existing conveying pipeline are in sealed fixed connection and are often difficult to obtain when chemical reagents need to be collected in the period, the invention provides a chemical product production device capable of sampling in time.
The invention provides a chemical product production device capable of sampling in time, which comprises a connecting box, wherein conveying pipelines are fixedly and hermetically arranged on the inner walls of two sides of the connecting box, one ends of the two conveying pipelines, which are far away from each other, extend to two sides of the connecting box respectively, a movable plate is connected in the connecting box in a sealing and sliding manner, two connecting rods are symmetrically and slidably connected to the inner wall of the bottom of the connecting box and are in transmission connection with the movable plate, the bottom ends of the two connecting rods extend to the lower part of the connecting box, clamping plates are fixedly arranged at the bottoms of the sides, which are close to each other, of the two connecting rods, an output pipe is fixedly arranged on the inner wall of the bottom of the connecting box, a sealing ring is fixedly arranged at the bottom of the connecting box, the bottom end of the output pipe penetrates through the sealing ring and extends to the lower part of the sealing, l type hole and one of them pipeline activity intercommunication, one side bottom fixed mounting of movable plate installs the backup pad, the removal hole has been seted up on one side inner wall of connecting box, one side of backup pad runs through the removal hole and extends to the outside of connecting box, one side top of connecting box is rotated and is connected with the dwang, and the dwang is connected with the backup pad transmission.
Preferably, the inner wall in L type hole is gone up sealed fixed mounting and is had the connecting pipe, and the bottom of connecting pipe extends to the below of movable plate and fixed mounting has the bellows, the bottom of bellows and the top of output tube sealed fixed connection can be so that L type hole and output tube are in the feed through state all the time.
Preferably, two moving holes are symmetrically formed in the inner wall of the bottom of the connecting box, a moving ring is connected to each moving hole in a sliding mode, the connecting rod penetrates through the moving ring and is fixedly connected with the inner wall of the moving ring, and the connecting rod can be limited in sliding mode.
Preferably, the sliding sleeve is equipped with the go-between that is located the connecting box on the connecting rod, top one side fixed mounting of go-between has the pull rod, and the top of two pull rods all with the bottom sliding connection of movable plate, it is connected with the swinging arms to rotate on the go-between, and the bottom of two swinging arms all rotates with the bottom inner wall of connecting box to be connected, can conveniently drive two connecting rods and carry out lateral shifting.
Preferably, top one side fixed mounting of backup pad has the carriage release lever that is located the connecting box outside, the dwang is connected with the carriage release lever transmission, can realize that dwang and carriage release lever carry out the transmission and are connected.
Preferably, the top fixed mounting of carriage release lever has the transmission ring, sliding connection has the transfer line in the transmission ring, the both ends of transfer line extend to the both sides of transmission ring respectively, the bottom of dwang is rotated with top one side of transfer line and is connected, can turn into the linear motion of carriage release lever with the rotary motion of dwang.
Preferably, one side top fixed mounting of connecting box has the arc template, the draw-in groove has been seted up to one side of arc template, sliding connection has the mounting panel on the dwang, and top one side rotation of mounting panel is connected with the card wheel, the card wheel clamps with the draw-in groove activity, can realize braking the dwang spacing.
Preferably, the slide opening has been seted up on the dwang, and the mounting panel runs through the slide opening, and fixed mounting has the gag lever post in the slide opening, the gag lever post run through the mounting panel and with mounting panel sliding connection, the cover is equipped with the extension spring who is located the mounting panel top on the gag lever post, and extension spring's top and bottom respectively with the top inner wall of slide opening and the top fixed connection of mounting panel, can with the card wheel automatic push into the draw-in groove.
The invention has the beneficial effects that:
the technical proposal is that a collecting cup for collecting chemical raw materials is sleeved on an output pipe, a sealing ring is utilized to be in sealing joint with the collecting cup, then a rotating rod can be rotated upwards to pull a transmission rod to move transversely, and the height of the transmission rod can be raised, at the moment, the movable rod can be driven to move upwards under the matching of the transmission ring, when the movable rod moves upwards, the movable plate can be driven by the supporting plate to move upwards, and when the rotating rod is rotated, the clamping wheel can roll on the arc-shaped plate, when the rotating rod rotates to the horizontal position, the clamping wheel corresponds to the clamping groove, the tension spring in the stressed state pulls the mounting plate to move, so that the clamping wheel can move into the clamping groove, the movable plate can be stably limited, and at the moment, the L-shaped hole can be communicated with a conveying pipeline for feeding;
when the movable plate upwards moved, two go-between of two pull rod pulling of accessible upwards removed, can make two swinging arms upwards rotate this moment, and when the swinging arms rotated, can pull the connecting rod and carry out lateral shifting, two splint were close to each other this moment, after braking the movable plate, usable two splint carry out stable clamp to collecting the cup this moment, later when chemical industry raw materials is carried by pipeline in to the connecting box, can be carried chemical products to the bellows by L type hole in, later can be carried chemical industry products in to collecting the cup by the output tube, with this can realize gathering chemical industry products.
The invention can realize the adjustment of the flow direction of the chemical products and can stably connect the collecting cups, thereby being capable of rapidly collecting and sampling the chemical products and being more convenient in operation, thereby having good practicability.
Drawings
FIG. 1 is a bottom view of a chemical product manufacturing apparatus capable of sampling in time according to the present invention;
FIG. 2 is a side sectional view of a chemical product manufacturing apparatus capable of sampling in time according to the present invention;
FIG. 3 is a front view of a chemical product manufacturing apparatus capable of sampling in time according to the present invention;
FIG. 4 is a schematic structural diagram of part A of FIG. 2 of a chemical product manufacturing apparatus capable of sampling in time according to the present invention;
fig. 5 is a schematic structural diagram of part B in fig. 2 of a chemical product production apparatus capable of sampling in time according to the present invention.
In the figure: the device comprises a connecting box 1, a conveying pipeline 2, an output pipe 3, a sealing ring 4, a moving plate 5, a 6L-shaped hole, a connecting pipe 7, an anticorrosive corrugated pipe 8, a supporting plate 9, a moving rod 10, a rotating rod 11, a moving hole 12, a moving ring 13, a connecting rod 14, a clamping plate 15, a connecting ring 16, a pull rod 17, a swinging rod 18, a driving ring 19, a driving rod 20, an arc-shaped plate 21, a clamping groove 22, a mounting plate 23, a limiting rod 24, a tension spring 25 and a clamping wheel 26.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Referring to fig. 1-5, the embodiment provides a chemical product production device capable of sampling in time, which includes a connection box 1, wherein the inner walls of two sides of the connection box 1 are fixedly and hermetically mounted with delivery pipes 2, and the ends of the two delivery pipes 2 far away from each other extend to two sides of the connection box 1 respectively, the connection box 1 is internally and slidably connected with a movable plate 5 in a sealing manner, the inner wall of the bottom of the connection box 1 is slidably and symmetrically connected with two connecting rods 14, and the two connecting rods 14 are in transmission connection with the movable plate 5, the bottom ends of the two connecting rods 14 extend to the lower side of the connection box 1, and the bottom of the side of the two connecting rods 14 close to each other is fixedly mounted with a clamp plate 15, the inner wall of the bottom of the connection box 1 is fixedly mounted with an output pipe 3, the bottom of the connection box 1 is fixedly mounted with a sealing ring 4, and the, the movable plate 5 is provided with an L-shaped hole 6, the L-shaped hole 6 corresponds to the output pipe 3, the L-shaped hole 6 is movably communicated with one conveying pipeline 2, a supporting plate 9 is fixedly installed at the bottom of one side of the movable plate 5, a moving hole is formed in the inner wall of one side of the connecting box 1, one side of the supporting plate 9 penetrates through the moving hole and extends to the outer side of the connecting box 1, the top of one side of the connecting box 1 is rotatably connected with a rotating rod 11, and the rotating rod 11 is in transmission connection with the supporting plate 9.
The collecting cup can adjust the flow direction of chemical products, can stably connect the collecting cup, can quickly collect and sample the chemical products, and is convenient to operate, so that the collecting cup has good practicability.
In this embodiment, the inner wall of the L-shaped hole 6 is fixedly and hermetically provided with a connecting pipe 7, the bottom end of the connecting pipe 7 extends to the lower side of the moving plate 5 and is fixedly provided with a bellows 8, and the bottom end of the bellows 8 is fixedly and hermetically connected with the top end of the output pipe 3, so that the L-shaped hole 6 and the output pipe 3 are always in a communicated state.
In this embodiment, two shift holes 12 have been seted up to the symmetry on the bottom inner wall of connecting box 1, and sliding connection has shift ring 13 in shift hole 12, and connecting rod 14 runs through shift ring 13 and with shift ring 13's inner wall fixed connection, can slide spacing connecting rod 14.
In this embodiment, the sliding sleeve is equipped with the go-between 16 that is located connecting box 1 on connecting rod 14, and top one side fixed mounting of go-between 16 has pull rod 17, and the top of two pull rods 17 all with the bottom sliding connection of movable plate 5, rotate on the go-between 16 and be connected with swinging arms 18, and the bottom of two swinging arms 18 all rotates with the bottom inner wall of connecting box 1 to be connected, can conveniently drive two connecting rods 14 and carry out lateral shifting.
In this embodiment, top one side fixed mounting of backup pad 9 has the carriage release lever 10 that is located the connecting box 1 outside, and dwang 11 is connected with the transmission of carriage release lever 10, can realize dwang 11 and carriage release lever 10 and carry out the transmission and be connected.
In this embodiment, the top end fixed mounting of carriage release lever 10 has drive ring 19, and sliding connection has transfer line 20 in drive ring 19, and the both ends of transfer line 20 extend to the both sides of drive ring 19 respectively, and the bottom of dwang 11 rotates with top one side of transfer line 20 to be connected, can turn into the linear motion of carriage release lever 10 with the rotary motion of dwang 11.
In this embodiment, one side top fixed mounting of connecting box 1 has arc template 21, and draw-in groove 22 has been seted up to one side of arc template 21, and sliding connection has mounting panel 23 on dwang 11, and top one side of mounting panel 23 rotates and is connected with card wheel 26, and card wheel 26 clamps with the activity of draw-in groove 22, can realize braking dwang 11 spacing.
In this embodiment, the slide opening has been seted up on the dwang 11, and the mounting panel 23 runs through the slide opening, and fixed mounting has gag lever post 24 in the slide opening, and gag lever post 24 run through mounting panel 23 and with mounting panel 23 sliding connection, the cover is equipped with the extension spring 25 that is located the mounting panel 23 top on the gag lever post 24, and extension spring 25's top and bottom respectively with the top inner wall of slide opening and the top fixed connection of mounting panel 23, can push draw-in groove 22 with card wheel 26 is automatic in.
In this embodiment, according to the technical scheme, a collecting cup for collecting chemical materials is firstly sleeved on an output pipe 3, and is sealed and attached to the collecting cup by using a sealing ring 4, then a rotating rod 11 can be rotated upwards to pull a transmission rod 20 to move transversely, and the height of the transmission rod 20 can be raised, at this time, under the cooperation of a transmission ring 19, a moving rod 10 can be driven to move upwards, when the moving rod 10 moves upwards, a moving plate 5 can be driven to move upwards by a supporting plate 9, and when the rotating rod 11 is rotated, a clamping wheel 26 can roll on an arc-shaped plate 21, when the rotating rod 11 rotates to a horizontal position, the clamping wheel 26 can correspond to a clamping groove 22, at this time, a tension spring 25 in a stressed state can pull a mounting plate 23 to move, so that the clamping wheel 26 can move into the clamping groove 22, the movable plate 5 can be stably limited, the L-shaped holes 6 can be communicated with the conveying pipeline 2 for feeding, when the movable plate 5 moves upwards, the two connecting rings 16 can be pulled by the two pull rods 17 to move upwards, the two swing rods 18 can be rotated upwards, and when the swing rods 18 rotate, the connecting rods 14 can be pulled to move transversely, the two clamping plates 15 are close to each other, after the movable plate 5 is braked, the collecting cup can be stably clamped by the two clamping plates 15, chemical products can be conveyed into the corrugated pipe 8 through the L-shaped holes 6 when chemical raw materials are conveyed into the connecting box 1 through the conveying pipeline 2, the chemical products can be conveyed into the collecting cup through the output pipe 3, and therefore, the chemical products can be collected, therefore, the flow direction of the chemical products can be adjusted, and can carry out stable connection to collecting the cup to this can be quick gather the sample to chemical products, can be more convenient when the operation simultaneously, so have good practicality.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The chemical product production device capable of sampling in time comprises a connecting box (1) and is characterized in that conveying pipelines (2) are fixedly mounted on the inner walls of the two sides of the connecting box (1) in a sealing mode, one ends, far away from each other, of the two conveying pipelines (2) extend to the two sides of the connecting box (1) respectively, a movable plate (5) is connected to the inner wall of the bottom of the connecting box (1) in a sliding mode in a sealing mode, two connecting rods (14) are symmetrically connected to the inner wall of the bottom of the connecting box (1) in a sliding mode, the two connecting rods (14) are connected with the movable plate (5) in a sliding mode, the bottoms of the two connecting rods (14) extend to the lower portion of the connecting box (1), a clamping plate (15) is fixedly mounted at the bottom of one side, close to each other, an output pipe (3) is fixedly mounted on the inner wall of the, and the bottom of output tube (3) runs through sealing ring (4) and extends to the below of sealing ring (4), L type hole (6) have been seted up on movable plate (5), and L type hole (6) are corresponding with output tube (3), L type hole (6) and one of them pipeline (2) activity intercommunication, one side bottom fixed mounting of movable plate (5) installs backup pad (9), the removal hole has been seted up on one side inner wall of connecting box (1), one side of backup pad (9) runs through the removal hole and extends to the outside of connecting box (1), one side top of connecting box (1) is rotated and is connected with dwang (11), and dwang (11) are connected with backup pad (9) transmission.
2. The chemical product production device capable of sampling in time according to claim 1, wherein the inner wall of the L-shaped hole (6) is fixedly provided with a connecting pipe (7) in a sealing manner, the bottom end of the connecting pipe (7) extends to the lower part of the moving plate (5) and is fixedly provided with a corrugated pipe (8), and the bottom end of the corrugated pipe (8) is fixedly connected with the top end of the output pipe (3) in a sealing manner.
3. The chemical product production device capable of sampling in time according to claim 1, wherein two moving holes (12) are symmetrically formed in the inner wall of the bottom of the connecting box (1), a moving ring (13) is slidably connected in the moving holes (12), and the connecting rod (14) penetrates through the moving ring (13) and is fixedly connected with the inner wall of the moving ring (13).
4. The chemical product production device capable of sampling in time according to claim 1, wherein the connecting rod (14) is slidably sleeved with a connecting ring (16) positioned in the connecting box (1), a pull rod (17) is fixedly mounted on one side of the top of the connecting ring (16), the top ends of the two pull rods (17) are slidably connected with the bottom of the moving plate (5), a swing rod (18) is rotatably connected to the connecting ring (16), and the bottom ends of the two swing rods (18) are rotatably connected with the inner wall of the bottom of the connecting box (1).
5. The chemical product production device capable of sampling in time according to claim 1, wherein a moving rod (10) located outside the connecting box (1) is fixedly installed on one side of the top of the supporting plate (9), and the rotating rod (11) is in transmission connection with the moving rod (10).
6. The chemical product production device capable of sampling in time according to claim 1, wherein a transmission ring (19) is fixedly mounted at the top end of the moving rod (10), a transmission rod (20) is slidably connected in the transmission ring (19), two ends of the transmission rod (20) respectively extend to two sides of the transmission ring (19), and the bottom end of the rotating rod (11) is rotatably connected with one side of the top of the transmission rod (20).
7. The chemical product production device capable of sampling in time according to claim 1, wherein an arc-shaped plate (21) is fixedly mounted at the top of one side of the connecting box (1), a clamping groove (22) is formed in one side of the arc-shaped plate (21), a mounting plate (23) is connected onto the rotating rod (11) in a sliding manner, a clamping wheel (26) is connected onto one side of the top of the mounting plate (23) in a rotating manner, and the clamping wheel (26) is movably clamped with the clamping groove (22).
8. The chemical product production device capable of sampling in time according to claim 1, wherein a slide hole is formed in the rotating rod (11), the mounting plate (23) penetrates through the slide hole, a limiting rod (24) is fixedly mounted in the slide hole, the limiting rod (24) penetrates through the mounting plate (23) and is in sliding connection with the mounting plate (23), an extension spring (25) located above the mounting plate (23) is sleeved on the limiting rod (24), and the top end and the bottom end of the extension spring (25) are respectively in fixed connection with the inner wall of the top of the slide hole and the top of the mounting plate (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298993.7A CN112525617A (en) | 2020-11-18 | 2020-11-18 | Chemical product production device capable of sampling in time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298993.7A CN112525617A (en) | 2020-11-18 | 2020-11-18 | Chemical product production device capable of sampling in time |
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| Publication Number | Publication Date |
|---|---|
| CN112525617A true CN112525617A (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011298993.7A Pending CN112525617A (en) | 2020-11-18 | 2020-11-18 | Chemical product production device capable of sampling in time |
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| Country | Link |
|---|---|
| CN (1) | CN112525617A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2076797A5 (en) * | 1970-01-28 | 1971-10-15 | Girolami Antoine | |
| CN107462444A (en) * | 2017-08-04 | 2017-12-12 | 九江天赐高新材料有限公司 | Duct type material sampler |
| CN107642615A (en) * | 2017-09-26 | 2018-01-30 | 君品集团有限公司 | Pipeline sampler |
| CN111713790A (en) * | 2020-06-30 | 2020-09-29 | 砀山县明昆防护用品有限公司 | Turnover device for mask machining |
| CN111735667A (en) * | 2020-06-05 | 2020-10-02 | 范文 | Ore pulp pipeline sampler convenient to seal |
| CN211712444U (en) * | 2019-12-25 | 2020-10-20 | 河南凯丰包装制品有限公司 | Clamping device for plastic product production |
-
2020
- 2020-11-18 CN CN202011298993.7A patent/CN112525617A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2076797A5 (en) * | 1970-01-28 | 1971-10-15 | Girolami Antoine | |
| CN107462444A (en) * | 2017-08-04 | 2017-12-12 | 九江天赐高新材料有限公司 | Duct type material sampler |
| CN107642615A (en) * | 2017-09-26 | 2018-01-30 | 君品集团有限公司 | Pipeline sampler |
| CN211712444U (en) * | 2019-12-25 | 2020-10-20 | 河南凯丰包装制品有限公司 | Clamping device for plastic product production |
| CN111735667A (en) * | 2020-06-05 | 2020-10-02 | 范文 | Ore pulp pipeline sampler convenient to seal |
| CN111713790A (en) * | 2020-06-30 | 2020-09-29 | 砀山县明昆防护用品有限公司 | Turnover device for mask machining |
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