CN213903035U - Sampling equipment for fluoride automatic determinator - Google Patents
Sampling equipment for fluoride automatic determinator Download PDFInfo
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- CN213903035U CN213903035U CN202022957905.1U CN202022957905U CN213903035U CN 213903035 U CN213903035 U CN 213903035U CN 202022957905 U CN202022957905 U CN 202022957905U CN 213903035 U CN213903035 U CN 213903035U
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Abstract
The utility model discloses a sampling device for a fluoride automatic determinator, which comprises a box body, wherein a movable clamp plate is arranged in the box body, a sealing top plate is connected and arranged below the movable clamp plate, detection membrane clamping grooves are respectively formed between the movable clamp plate and the top end of the inner wall of the sampling box body and between the movable clamp plate and the sealing top plate, and the sealing top plate and the movable clamp plate are driven by a sealing driving mechanism to move up and down; the top end of the box body is provided with a sampling structure and a blank test structure side by side, and the detection membrane clamping grooves comprise two detection membrane clamping grooves a and two detection membrane clamping grooves b; and the sampling structure is communicated with the detection membrane clamping groove a to form a sampling and pumping mechanism. The utility model discloses mainly carry out automatic continuous sampling to ambient air fluoride through the filter membrane sampling method, the blank test structure can get rid of in the environment air automatic entering this device effectively and cause the possibility of influence to the experimental result, can guarantee the accuracy nature of experimental result effectively.
Description
Technical Field
The utility model relates to an air quality monitoring technology field, especially a fluoride sampling equipment for automatic analyzer mainly is suitable for the collection of gaseous state and granular state fluoride in the air.
Background
The fluoride in the ambient air has two kinds of gaseous fluorine and dust-like fluorine, the gaseous fluorine is mainly hydrogen fluoride, and the fluorine-containing dust is mainly gas and dust discharged or dissipated from electrolytic aluminum plants, phosphate fertilizer plants, cryolite plants and the like as long as the gas is cryolite, fluorite, aluminum fluoride and phosphor lime. 400-430 mg/m of hydrogen fluoride3Can cause acute poisoning and death under the concentration, can affect the normal physiological functions of various tissues and organs by inhaling the gas and dust of low-concentration fluorine and compounds thereof for a long time, and even cause chronic fluorosis, so that the accurate determination of the fluorine pollution in the ambient air is very important.
The existing environmental air fluoride sampling equipment is independent, only manual sampling can be carried out, and automatic continuous sampling cannot be carried out.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve provides a fluoride sampling equipment for automatic determinator to solve the problem that current sampling equipment can't carry out automatic continuous sampling, in order to realize sampling equipment's continuous sampling.
In order to solve the technical problem, the utility model adopts the following technical proposal.
The sampling equipment for the automatic fluoride determinator comprises a box body, wherein a movable clamp plate is arranged in the box body, a sealing top plate is connected and arranged below the movable clamp plate, detection membrane clamping grooves for containing filter membrane clamps are respectively formed between the movable clamp plate and the top end of the inner wall of the sampling box body and between the movable clamp plate and the sealing top plate, the sealing top plate and the movable clamp plate move up and down under the driving of a sealing driving mechanism, and the sealing driving mechanism is arranged in the box body; the top end of the box body is provided with a sampling structure for filtering and sampling environmental gas and a blank test structure which is the same as the sampling structure and is used for carrying out a blank comparison test, and the detection membrane clamping grooves comprise two detection membrane clamping grooves a communicated with the sampling structure and two detection membrane clamping grooves b communicated with the blank test structure; the sampling structure and the detection membrane clamping groove a are communicated with each other to form a sampling and sucking mechanism for sucking ambient air to enable the sampling structure to sample; the sampling device also comprises a controller, and the controlled ends of the sampling suction mechanism and the sealing driving mechanism are respectively connected with the output end of the controller.
According to the technical scheme, the sealing driving mechanism comprises a steering air channel fixedly arranged at the bottom end of the sealing top plate and a lifting mechanism arranged below the steering air channel and used for driving the steering air channel and the sealing top plate to lift, two through holes communicated with the detection membrane clamping groove a and the detection membrane clamping groove b are respectively formed in the sealing top plate, the steering air channel is located under the detection membrane clamping groove a and communicated with the detection membrane clamping groove a, and the controlled end of the lifting mechanism is connected to the output end of the controller.
The technical scheme is further optimized, the lifting mechanism comprises a lead screw rotatably arranged on the bottom wall of the box body, a screw nut arranged in the box body and matched with the lead screw, and a driving motor connected with one end of the lead screw extending out of the box body, wherein the controlled end of the driving motor is connected with the output end of the controller; the bottom end of the side wall of the steering air channel is fixedly provided with a first transverse plate, the screw is fixedly connected with a screw connecting plate, the bottom end of the inner wall of the box body is detachably provided with a guide roller which sequentially and movably penetrates through the screw connecting plate and the first transverse plate, and a first spring which is sleeved on the outer side of the guide roller is fixedly arranged between the top end of the screw connecting plate and the bottom end of the first transverse plate.
According to the technical scheme, the top end of the sealing top plate is fixedly provided with a plurality of second guide rollers which can penetrate through the movable clamping plate movably, and a second spring which is sleeved on the outer side of the second guide roller is connected and arranged between the sealing top plate and the movable clamping plate.
According to the technical scheme, the box body is internally detachably connected with a plurality of vertically arranged movable guide rails, and the sealing top plate penetrates through the movable guide rails and can slide up and down along the movable guide rails.
According to the technical scheme, the sampling and pumping mechanism comprises a spring air pipe communicated with the steering air channel, an air suction pipeline communicated with the spring air pipe and a sampling pump communicated with the air suction pipeline, and the controlled end of the sampling pump is connected to the output end of the controller.
Further optimize technical scheme, the intercommunication is provided with the flowmeter that is used for statistics gas collection flow on the side of exhaust duct, and the output of flowmeter is connected in the input of controller.
Further optimize technical scheme, it is used for carrying out spacing stopper to sealed roof shift position to be provided with on the inside wall of box fixedly, and the output of stopper is connected in the controller input.
According to the technical scheme, filter membrane supporting structures are arranged inside the sampling structure and the blank test structure respectively.
Further optimize technical scheme, the fixed a plurality of archs that are provided with in top of portable splint, a plurality of recesses with protruding matched with respectively have been seted up on the inner wall top of box.
Due to the adoption of the technical scheme, the utility model has the following technical progress.
The utility model discloses mainly carry out automatic continuous sampling to ambient air fluoride through the filter membrane sampling method, the blank test structure can get rid of in the environment air automatic entering this device effectively and cause the possibility of influence to the experimental result, can guarantee the accuracy nature of experimental result effectively.
The utility model discloses portable splint can the up-and-down motion through sealed actuating mechanism's drive, and then make and detect the membrane draw-in groove and open, closed to the filter membrane presss from both sides to change automatically and gets to put.
The utility model discloses the fixed stopper that is provided with on the inside wall of box, stopper are used for carrying on spacingly to sealed roof shift position, upwards move when touching the stopper when sealed roof, and the stopper will be with the position signal feedback to the controller of sealed roof this moment, and then the controller comes the stop upward movement of sealed roof, has reached limiting displacement well.
The utility model discloses can realize automatic continuous sampling and record and control flow under the condition of unmanned guard.
Drawings
Fig. 1 is a cross-sectional view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
fig. 3 is a top view of the present invention;
fig. 4 is a side view of the present invention.
Wherein: 1. the device comprises a box body, 11, a groove, 2, a sampling structure, 21, a sampling air inlet pipe, 3, a blank test structure, 31, a blank test air inlet pipe, 4, a movable clamping plate, 41, a detection membrane clamping groove, 42, a protrusion, 5, a sealing driving mechanism, 52, a movable guide rail, 53, a steering air channel, 531, a first transverse plate, 532, a second transverse plate, 54, a lead screw, 55, a nut, 56, a driving motor, 57, a guide roller, 58, a first spring, 59, a second guide roller, 510, a second spring, 511, a nut connecting plate, 6, a sampling suction mechanism, 61, a spring air pipe, 62, an air suction pipeline, 63, a connector, 7, a flowmeter, 8, a limiter, 9 and a sealing top plate.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
A sampling device for a fluoride automatic determinator is shown in figures 1 to 4 and comprises a box body 1, a movable clamping plate 4, a detection membrane clamping groove 41, a sealing driving mechanism 5, a sampling structure 2, a blank test structure 3, a sampling suction mechanism 6 and a controller.
The device is integrally fixed on the instrument main board. The utility model provides a controller is the PLC controller.
The box body 1 is formed by surrounding a supporting frame, and the interior of the box body 1 is hollow.
A movable clamping plate 4 is arranged in the box body 1, a sealing top plate 9 is connected and arranged below the movable clamping plate 4, and the sealing top plate 9 and the movable clamping plate 4 move up and down through the driving of a sealing driving mechanism 5 arranged in the box body 1. Detection membrane clamping grooves 41 for containing the filter membrane clamps are formed between the movable clamping plate 4 and the top end of the inner wall of the sampling box body 1 and between the movable clamping plate 4 and the sealing top plate 9 respectively.
The fixed a plurality of archs 42 that are provided with in top of portable splint 4, the inner wall top of box 1 has been seted up a plurality of respectively with protruding 42 matched with recess 11, when sealed actuating mechanism 5 drive portable splint 4 rebound, protruding 42 can enter into in the recess 11, and then make to form two between the top of portable splint 4 and the inner wall top of sampling box 1 and carry out the sealed detection membrane draw-in groove of centre gripping to the filter membrane clamp. Meanwhile, two detection membrane clamping grooves are formed between the movable clamping plate 4 and the sealing top plate 9.
Four filter membrane clamps can be placed in the sampling equipment at the same time, two movable clamping plates 4 can be placed on the upper edge, a blank test filter membrane clamp is arranged on the left side, and a sampling filter membrane clamp is arranged on the right side; two movable clamping plates 4 can be placed below the movable clamping plates, the left side of each movable clamping plate is a blank test filter membrane clamp, and the right side of each movable clamping plate is a sampling filter membrane clamp. When the movable clamping plate 4 and the sealing top plate 9 are pulled downwards, the filter membrane clamps can be placed step by step, and when the movable clamping plate 4 and the sealing top plate 9 are pushed upwards, the four filter membrane clamps are tightly pressed and sealed at the same time.
The top of box 1 is provided with sampling structure 2 and blank test structure 3 side by side. The sampling structure 2 is used for filtering and sampling ambient gas. The blank test structure 3 is identical to the sampling structure 2 in structure and is used for carrying out a blank control test.
The number of the detection membrane clamping grooves 41 is four, and the detection membrane clamping grooves comprise detection membrane clamping grooves a communicated with the sampling structure 2 and detection membrane clamping grooves b communicated with the blank test structure 3. The filter membrane clamps placed in the upper detection membrane clamping groove b and the lower detection membrane clamping groove b on the left side are used as a whole blank, and the filter membrane clamps placed in the upper detection membrane clamping groove a and the lower detection membrane clamping groove a on the right side are used as actual samples.
The blank test structure 3 comprises a blank test air inlet pipe 31, and the blank test air inlet pipe 31 is arranged at the top end of the box body 1 and communicated with the detection membrane clamping groove b.
The sampling structure 2 and the blank test structure 3 are respectively provided with a filter membrane supporting structure inside, namely the filter membrane supporting structures are respectively arranged inside the sampling air inlet pipe 21 and the blank test air inlet pipe 31.
The filter membrane support structure comprises a filter membrane net pad and a spacing ring. The filter membrane gauze pad is provided with an upper layer and a lower layer and is a stainless steel supporting filter membrane gauze pad. The two layers of filter membrane net cushions are separated by a spacing ring.
The seal driving mechanism 5 includes a turning air duct 53 and a lifting mechanism. The controlled end of the sealing driving mechanism 5 is connected to the output end of the controller, and the sealing driving mechanism 5 is used for driving the sealing top plate 9 and the movable clamping plate 4 to move up and down, so that the detection membrane clamping groove is opened and closed, and the filter membrane clamp can be replaced, taken and placed conveniently.
The sealing top plate 9 is connected with the bottom end of the movable clamping plate 4. The top end of the sealing top plate 9 is fixedly provided with a plurality of second guide rollers 59 which movably penetrate through the movable clamping plate 4, and a second spring 510 which is sleeved on the outer side of the second guide rollers 59 is connected between the sealing top plate 9 and the movable clamping plate 4.
The turning air duct 53 is fixedly arranged at the bottom end of the sealing top plate 9 and is positioned right below the sampling structure 2. Two through holes communicated with the detection membrane clamping groove a and the detection membrane clamping groove b are respectively formed in the sealing top plate 9, and the steering air duct 53 is located under the detection membrane clamping groove a and is communicated with the detection membrane clamping groove a.
The lifting mechanism is arranged below the steering air duct 53 and used for driving the steering air duct 53 and the sealing top plate 9 to lift, and the controlled end of the lifting mechanism is connected to the output end of the controller.
The elevating mechanism includes a lead screw 54, a nut 55, and a drive motor 56. The lead screw 54 is rotatably arranged on the bottom wall of the box body 1, the lead screw 54 is vertically arranged, and the top end of the lead screw extends into the box body 1. The nut 55 is provided in the case 1 and fitted with the lead screw 54. The driving motor 56 is connected with one end of the lead screw 54 extending out of the box body 1, and the controlled end of the driving motor 56 is connected with the output end of the controller.
The nut 55 is provided with a nut attachment plate 511 by screw attachment. The bottom end of the side wall of the turning air duct 53 is fixedly provided with a first transverse plate 531, and the top end of the side wall of the turning air duct 53 is fixedly provided with a second transverse plate 532. The bottom end of the inner wall of the box body 1 is detachably provided with a guide roller 57 which sequentially and movably penetrates through the nut connecting plate 511 and the first transverse plate 531, the bottom end of the guide roller 57 is arranged on the box body 1 through a bolt, the top end of the guide roller 57 extends into the space between the first transverse plate 531 and the second transverse plate 532, and the top end of the guide roller is not connected with the second transverse plate 532. A first spring 58 sleeved outside the guide roller 57 is fixedly arranged between the top end of the nut connecting plate 511 and the bottom end of the first transverse plate 531.
A plurality of vertically arranged movable guide rails 52 are detachably connected in the box body 1, the sealing top plate 9 penetrates through the movable guide rails 52 and can slide up and down along the movable guide rails 52, and the arranged sealing top plate 9 enables the movable guide rails 52 to move up and down more stably without deflection.
The sampling and pumping mechanism 6 comprises a spring air pipe 61 communicated with the steering air duct 53, an air suction pipeline 62 communicated with the spring air pipe 61 and a sampling pump communicated with the air suction pipeline 62, and the controlled end of the sampling pump is connected to the output end of the controller. One end of the air suction pipeline 62 is provided with a connector 63, and the sampling pump is connected with the connector 63 through a connecting pipe.
The sampling pump can ensure that the flow range is adjustable between 10L/min and 60L/min under the load that the air inlet end is less than 20 kPa.
The filter membrane clamp which is provided with the filter membrane and close to one end of the spring air pipe 61 is used for sampling fluoride in air, and the filter membrane clamp which is provided with the filter membrane and close to the other end of the spring air pipe is used for making a blank of a laboratory and a blank of the whole process.
The side of the air draft pipeline 62 is communicated with a flowmeter 7 used for counting the gas collection flow, and the output end of the flowmeter 7 is connected to the input end of the controller. The utility model provides a flowmeter 7 is mass flow meter.
The fixed stopper 8 that is provided with on the inside wall of box 1, stopper 8 are used for spacing 9 shift position of sealed roof, and the output of stopper 8 is connected in the controller input. Stopper 8 is travel switch, and when sealed roof 9 upwards moved and touched stopper 8, stopper 8 will be with the position signal feedback to the controller of sealed roof 9 this moment, and then the controller comes control sealed roof 9 to stop upward movement, has reached limiting displacement well.
The utility model discloses gaseous state and the collection of granular state fluoride in the mainly suitable air, sampling flow can be less than under 20 kPa's load at the inlet end, can guarantee that the flow scope can set for gas collection flow wantonly between 10L/min ~ 60L/min. The sampling time can be set at will between 1min and 99h, or between 1m and 999m3The gas collection volume under the standard condition is set at will.
The utility model discloses when actually sampling, controller control sampling pump starts, the sampling pump pumps the operation, air in the environment is sucked the inside of device from sampling intake pipe 21, filter membrane bearing structure in the sampling intake pipe 21 filters inhaled air, the air after crossing filters through the filter membrane clamp of centre gripping in detecting membrane draw-in groove 41, absorb the fluoride in the air by the filter membrane in the filter membrane clamp, and then make the sampling pump bleed and adsorb the sample in the air on two-layer filter membrane, air after absorbing enters into spring tuber pipe 61 department, then through flowmeter 7, flowmeter 7 makes statistics to the air mass flow that passes through.
And simultaneously, the utility model discloses in the blank test structure 3 that sets up can get rid of in the environment air automatic entering into sampling intake pipe 21 effectively and cause the possibility of influence to the experimental result, can guarantee the accuracy nature of experimental result effectively.
When the utility model discloses when carrying out the change that the filter membrane pressed from both sides or getting and put, controller control driving motor 56 functions, driving motor 56 drives lead screw 54 and rotates, lead screw 54 drives screw 55 and the screw connecting plate 511 downstream fixed mutually with screw 55, can stimulate first spring 58 downstream when screw connecting plate 511 downstream, first spring 58 stimulates first horizontal plate 531, turn to wind channel 53 and sealed roof 9 downstream, sealed roof 9 passes through second spring 510 and stimulates portable splint 4 downstream, and then will detect membrane draw-in groove a and detect membrane draw-in groove b and open, change or get and put the filter membrane clamp this moment.
Through sealed actuating mechanism 5 pulling sealed roof 9 and portable splint 4 downwards, it has two gears to store up the membrane storehouse, a gear is aimed at and is located the detection membrane draw-in groove a between left portable splint 4 and the 1 inner wall top of box, a gear is aimed at and is located the detection membrane draw-in groove b between portable splint 4 and the sealed roof 9 on right side, the lateral shifting of filter membrane clamp automatic pushing equipment is mated again, can push any sampling station (total four stations, sampling station all is stained with the silica gel piece that is used for sealing up from top to bottom with the filter membrane clamp of storing up the membrane storehouse wantonly (totally two storage membrane storehouses) inside.
After the filter membrane clamp is replaced, the controller controls the driving motor 56 to reversely operate, the driving motor 56 drives the screw 54 to rotate, the screw 54 drives the nut 55 and the nut connecting plate 511 fixed with the nut 55 to move upwards, and the first spring 58 and the second spring 510 can be in a compressed state. Can touch stopper 8 when sealed roof 9 upward movement to a certain position, stopper 8 feeds back the positional information of sealed roof 9 this moment to the controller, and then the controller controls sealed roof 9 and stops upward movement, at this moment, presss from both sides the filter membrane and carries out inseparable centre gripping. Is pushed up by the seal driving mechanism 5 until the seal is ensured. The sampling suction mechanism 6 is started and the flow meter 7 controls and records the flow.
And finally, shearing, extracting, detecting and analyzing the collected filter membrane in the filter membrane clamp by a shearing device, a reaction device and an analysis device to obtain the concentration information of the fluoride in the solution and calculate the concentration value of the fluoride in the air.
Claims (10)
1. Sampling equipment for fluoride automatic determinator, including box (1), its characterized in that: a movable clamping plate (4) is arranged in the box body (1), a sealing top plate (9) is connected and arranged below the movable clamping plate (4), detection membrane clamping grooves (41) for containing filter membrane clamps are respectively formed between the movable clamping plate (4) and the top end of the inner wall of the sampling box body (1) and between the movable clamping plate (4) and the sealing top plate (9), the sealing top plate (9) and the movable clamping plate (4) move up and down through the driving of a sealing driving mechanism (5), and the sealing driving mechanism (5) is arranged in the box body (1); the top end of the box body (1) is provided with a sampling structure (2) for filtering and sampling environmental gas and a blank test structure (3) which has the same structure as the sampling structure (2) and is used for performing a blank comparison test, and the detection membrane clamping grooves (41) comprise two detection membrane clamping grooves a communicated with the sampling structure (2) and two detection membrane clamping grooves b communicated with the blank test structure (3); the sampling structure (2) and the detection membrane clamping groove a are communicated with each other and provided with a sampling and sucking mechanism (6) for sucking ambient air to enable the sampling structure to sample; the sampling device also comprises a controller, and the controlled ends of the sampling suction mechanism (6) and the sealing driving mechanism (5) are respectively connected with the output end of the controller.
2. The sampling apparatus for an automated fluoride analyzer according to claim 1, wherein: the sealing driving mechanism (5) comprises a steering air channel (53) fixedly arranged at the bottom end of the sealing top plate (9) and a lifting mechanism arranged below the steering air channel (53) and used for driving the steering air channel (53) and the sealing top plate (9) to lift, two through holes communicated with a detection membrane clamping groove a and a detection membrane clamping groove b are respectively formed in the sealing top plate (9), the steering air channel (53) is located under the detection membrane clamping groove a and communicated with the detection membrane clamping groove a, and the controlled end of the lifting mechanism is connected to the output end of the controller.
3. The sampling apparatus for an automated fluoride analyzer according to claim 2, wherein: the lifting mechanism comprises a lead screw (54) rotatably arranged on the bottom wall of the box body (1), a screw nut (55) arranged in the box body (1) and matched with the lead screw (54), and a driving motor (56) connected with one end of the lead screw (54) extending out of the box body (1), wherein the controlled end of the driving motor (56) is connected with the output end of the controller; the bottom end of the side wall of the steering air duct (53) is fixedly provided with a first transverse plate (531), a nut (55) is fixedly connected with a nut connecting plate (511), the bottom end of the inner wall of the box body (1) is detachably provided with a guide roller (57) which sequentially and movably penetrates through the nut connecting plate (511) and the first transverse plate (531), and a first spring (58) which is sleeved on the outer side of the guide roller (57) is fixedly arranged between the top end of the nut connecting plate (511) and the bottom end of the first transverse plate (531).
4. The sampling apparatus for an automated fluoride analyzer according to claim 2, wherein: the top end of the sealing top plate (9) is fixedly provided with a plurality of second guide rollers (59) which can penetrate through the movable clamping plate (4) in a movable mode, and a second spring (510) which is sleeved on the outer side of each second guide roller (59) is connected and arranged between the sealing top plate (9) and the movable clamping plate (4).
5. The sampling apparatus for an automated fluoride analyzer according to claim 2, wherein: a plurality of vertically arranged movable guide rails (52) are detachably connected in the box body (1), and the sealing top plate (9) penetrates through the movable guide rails (52) and can slide up and down along the movable guide rails (52).
6. The sampling apparatus for an automated fluoride analyzer according to claim 2, wherein: the sampling and pumping mechanism (6) comprises a spring air pipe (61) communicated with the steering air duct (53), an air suction pipeline (62) communicated with the spring air pipe (61) and a sampling pump communicated with the air suction pipeline (62), and the controlled end of the sampling pump is connected to the output end of the controller.
7. The sampling apparatus for an automated fluoride analyzer according to claim 6, wherein: the side of the air draft pipeline (62) is communicated with a flowmeter (7) used for counting gas collection flow, and the output end of the flowmeter (7) is connected to the input end of the controller.
8. The sampling apparatus for an automated fluoride analyzer according to claim 2, wherein: the device is characterized in that a limiting stopper (8) used for limiting the moving position of the sealing top plate (9) is fixedly arranged on the inner side wall of the box body (1), and the output end of the limiting stopper (8) is connected to the input end of the controller.
9. The sampling apparatus for an automated fluoride analyzer according to claim 1, wherein: and filter membrane supporting structures are respectively arranged inside the sampling structure (2) and the blank test structure (3).
10. The sampling apparatus for an automated fluoride analyzer according to claim 1, wherein: the top end of the movable clamping plate (4) is fixedly provided with a plurality of bulges (42), and the top end of the inner wall of the box body (1) is provided with a plurality of grooves (11) which are respectively matched with the bulges (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022957905.1U CN213903035U (en) | 2020-12-09 | 2020-12-09 | Sampling equipment for fluoride automatic determinator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022957905.1U CN213903035U (en) | 2020-12-09 | 2020-12-09 | Sampling equipment for fluoride automatic determinator |
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| Publication Number | Publication Date |
|---|---|
| CN213903035U true CN213903035U (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022957905.1U Active CN213903035U (en) | 2020-12-09 | 2020-12-09 | Sampling equipment for fluoride automatic determinator |
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| Country | Link |
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| CN (1) | CN213903035U (en) |
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2020
- 2020-12-09 CN CN202022957905.1U patent/CN213903035U/en active Active
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