CN215493571U

CN215493571U - COD on-line measuring device

Info

Publication number: CN215493571U
Application number: CN202122053702.4U
Authority: CN
Inventors: 陆顺东
Original assignee: Changzhou Dongdan Automation Technology Co ltd
Current assignee: Changzhou Dongdan Automation Technology Co ltd
Priority date: 2021-08-29
Filing date: 2021-08-29
Publication date: 2022-01-11
Anticipated expiration: 2031-08-29

Abstract

The utility model belongs to the field of water quality detection, and particularly relates to a COD (chemical oxygen demand) online detection device which comprises a detector body, a test tube and a reagent adding structure; a placing hole is formed in the top surface of the detection end of the detector body, and a test tube is slidably mounted in the placing hole; the reagent adding structure comprises a supporting arm, an injection needle and a screw rod; the top surface of the detector body is fixedly connected with a supporting arm, a sliding table is slidably mounted on the outer side of the supporting arm, a liquid medicine cavity is formed in the sliding table, a plurality of injection needles are inserted into the bottom surface of the sliding table, the outer rings of the injection needles penetrate through sealing plugs of test tubes, a piston is slidably mounted in the liquid medicine cavity, a screw rod is rotatably mounted in the middle of the top surface of the piston, a threaded hole is formed in the top wall of the liquid medicine cavity, the outer rings of the screw rod are in threaded fit with the inner rings of the threaded hole, a reagent is filled in the bottom of the liquid medicine cavity, and the liquid level of the reagent is located at the bottom of the piston; the reagent is accurately added between the test tubes, and the detection accuracy is improved.

Description

COD on-line measuring device

Technical Field

The utility model relates to the field of water quality detection, in particular to a COD online detection device.

Background

COD is the amount of reducing substances needing to be oxidized in a water sample measured by a chemical method, and is an important organic pollution parameter which can be measured quickly. The COD detector in the prior art carries out a rapid digestion spectrophotometry to detect COD, and the detection principle is that a potassium dichromate solution is digested at high temperature in a medium of strong acid by taking silver sulfate as a catalyst, and then the COD value is measured by the spectrophotometry.

However, when the COD detector detects various sample liquids, a worker needs to manually add reagents into test tubes of the sample liquids, but the manual addition accuracy is not high, and the amount of the reagents added into each test tube is different, so that the detection result is different; therefore, the COD online detection device is proposed to address the above problems.

SUMMERY OF THE UTILITY MODEL

In order to make up for the defects of the prior art and solve the problems that when a COD detector detects various sample liquids, a worker needs to manually add reagents into test tubes of the sample liquids, but the manual adding accuracy is low, and the amount of the reagents added into each test tube is different, so that the detection results are different, the utility model provides the COD online detection device.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the COD online detection device comprises a detector body, a test tube and a reagent adding structure; a placing hole is formed in the top surface of the detection end of the detector body, a test tube is slidably mounted in the placing hole, and a reagent adding structure is arranged at the detection end of the detector body and is positioned right above the test tube;

the reagent adding structure comprises a supporting arm, a sliding table, an injection needle, a piston and a screw rod; the top surface of the detector body is fixedly connected with a supporting arm, a sliding table is slidably mounted on the outer side of the supporting arm, a liquid medicine cavity is formed in the sliding table, a plurality of injection needles are inserted into the bottom surface of the sliding table, the inner rings of the injection needles are communicated with the liquid medicine cavity, the outer rings of the injection needles penetrate through sealing plugs of test tubes, a piston is slidably mounted in the liquid medicine cavity, a screw rod is rotatably mounted in the middle of the top surface of the piston, a threaded hole is formed in the top wall of the liquid medicine cavity, the outer rings of the screw rod are in threaded fit with the inner rings of the threaded hole, a reagent is filled in the bottom of the liquid medicine cavity, and the liquid level of the reagent is located at the bottom of the piston; the reagent is accurately added between the test tubes, and the detection accuracy is improved.

Preferably, sliding grooves are formed in two sides of the supporting arm, a convex block in a groove of the sliding table is in sliding fit with the side walls of the sliding grooves, hydraulic cylinders are fixedly connected to bottom surfaces of two sides of a cross beam of the supporting arm, and bottom ends of piston rods of the hydraulic cylinders are fixedly connected with top surfaces of the sliding table; the automatic and accurate sliding of the sliding table is realized, and the reagent adding accuracy is further improved.

Preferably, the bottom of the front surface of the sliding table is fixedly connected with an adding pipe, the inner ring of the adding pipe is communicated with the liquid medicine cavity, the middle part of the adding pipe is provided with a one-way valve, and the water flowing direction of the one-way valve points to the liquid medicine cavity; reagent is added into the liquid medicine cavity through the adding pipe, and the reagent is prevented from reversely flowing out of the adding pipe through the one-way performance of the one-way valve.

Preferably, the middle part of the piston is provided with a plurality of slide holes, the interior of the liquid medicine cavity is fixedly connected with a plurality of slide bars, and the outer walls of the slide bars are in sliding fit with the inner walls of the slide holes; the piston is prevented from rotating with the screw.

Preferably, the outer ring of the placing hole is fixedly connected with a plurality of round seats, the outer ring of each round seat is fixedly connected with a plurality of arc-shaped elastic pieces, and the arc-shaped elastic pieces clamp the test tube; the overall stability of the test tube is improved.

Preferably, a support column is fixedly connected to the middle of the top surface of the round seat, an outer ring at the top of the support column is fixedly connected to one end of each of a plurality of springs, the other end of each of the springs is fixedly connected to the arc-shaped elastic sheet, an outer ring at the top of the support column is fixedly connected to one end of a telescopic rod, the other end of the telescopic rod is fixedly connected to the arc-shaped elastic sheet, and an inner ring of each of the springs is sleeved on an outer ring of the telescopic rod; through the elasticity of spring, promote the arc shell fragment and further press from both sides tight test tube, further improved the stability of test tube.

The utility model has the advantages that:

1. different detection samples are collected through the test tubes, the hydraulic cylinder pushes the sliding table to slide downwards along the supporting arm, so that the injection needle is inserted into the test tube, the screw rod is rotated to push the piston to descend, and the reagent in the liquid medicine cavity is pressed into the test tube, so that the reagent is accurately added between the test tubes, and the detection accuracy is improved;

2. the test tube clamp is fixed through the arc-shaped elastic piece that sets up, and the elasticity of spring promotes the arc-shaped elastic piece and further presss from both sides tight test tube, has improved the overall stability of test tube.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic overall structure diagram of the first embodiment;

FIG. 2 is a side sectional view of the first embodiment;

fig. 3 is a schematic structural view of an arc-shaped elastic sheet according to the first embodiment;

FIG. 4 is an enlarged view of a portion of FIG. 1 at A;

FIG. 5 is an enlarged view of a portion of FIG. 1 at B;

FIG. 6 is an enlarged view of a portion of FIG. 2 at C;

fig. 7 is a schematic overall structure diagram of the second embodiment.

In the figure: 1. a detector body; 2. a test tube; 3. placing holes; 4. a support arm; 5. a sliding table; 6. an injection needle; 8. a piston; 9. a screw; 10. a liquid medicine cavity; 11. a threaded hole; 12. a chute; 13. a hydraulic cylinder; 14. an addition pipe; 15. a one-way valve; 16. a slide hole; 17. a slide bar; 18. a round base; 19. an arc-shaped elastic sheet; 20. a support pillar; 21. a spring; 22. a telescopic rod; 23. and (4) sucking discs.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-6, the COD on-line detecting device includes a detector body 1, a test tube 2 and a reagent adding structure; a placing hole 3 is formed in the top surface of the detection end of the detector body 1, a test tube 2 is slidably mounted in the placing hole 3, and a reagent adding structure is arranged at the detection end of the detector body 1 and is positioned right above the test tube 2;

the reagent adding structure comprises a supporting arm 4, a sliding table 5, an injection needle 6, a piston 8 and a screw 9; the detector comprises a detector body 1, a supporting arm 4 is fixedly connected to the top surface of the detector body 1, a sliding table 5 is slidably mounted on the outer side of the supporting arm 4, a liquid medicine cavity 10 is formed in the sliding table 5, a plurality of injection needles 6 are inserted into the bottom surface of the sliding table 5, inner rings of the injection needles 6 are communicated with the liquid medicine cavity 10, outer rings of the injection needles 6 penetrate through sealing plugs of test tubes 2, a piston 8 is slidably mounted in the liquid medicine cavity 10, a mounting screw rod 9 is rotatably mounted in the middle of the top surface of the piston 8, a threaded hole 11 is formed in the top wall of the liquid medicine cavity 10, outer rings of the screw rod 9 are in threaded fit with inner rings of the threaded hole 11, reagents are filled in the bottom of the liquid medicine cavity 10, and liquid levels of the reagents are located at the bottom of the piston 8; gather different detection samples through test tube 2, promote slip table 5 along support arm 4 lapse for syringe needle 6 inserts in test tube 2, rotates screw rod 9, promotes piston 8 and descends, impresses the reagent in the liquid medicine chamber 10 in test tube 2, has realized the accurate reagent that adds between test tube 2, has improved the degree of accuracy that detects.

The two sides of the supporting arm 4 are respectively provided with a sliding chute 12, a convex block in a groove of the sliding table 5 is in sliding fit with the side wall of the sliding chute 12, the bottom surfaces of the two sides of a cross beam of the supporting arm 4 are fixedly connected with a hydraulic cylinder 13, and the bottom end of a piston rod of the hydraulic cylinder 13 is fixedly connected with the top surface of the sliding table 5; the lifting and descending of the sliding table 5 are pushed by the hydraulic cylinder 13, so that the sliding of the sliding table 5 is automatically and accurately realized, and the reagent adding accuracy is further improved.

An adding pipe 14 is fixedly connected to the bottom of the front face of the sliding table 5, the inner ring of the adding pipe 14 is communicated with the liquid medicine cavity 10, a one-way valve 15 is arranged in the middle of the adding pipe 14, and the water flowing direction of the one-way valve 15 points to the liquid medicine cavity 10; reagent is added into the liquid medicine cavity 10 through the adding pipe 14, and the reagent is prevented from reversely flowing out of the adding pipe 14 through the one-way performance of the one-way valve 15.

A plurality of slide holes 16 are formed in the middle of the piston 8, a plurality of slide rods 17 are fixedly connected inside the liquid medicine cavity 10, and the outer walls of the slide rods 17 are in sliding fit with the inner walls of the slide holes 16; the sliding direction of the piston 8 is defined by the sliding fit of the slide rod 17 with the slide hole 16, and the piston 8 is prevented from rotating along with the rotation of the screw 9.

The outer ring of the placing hole 3 is fixedly connected with a plurality of round seats 18, the outer ring of each round seat 18 is fixedly connected with a plurality of arc-shaped elastic sheets 19, and the arc-shaped elastic sheets 19 clamp the test tube 2; the test tube 2 is clamped and fixed by the arc-shaped elastic sheet 19, so that the overall stability of the test tube 2 is improved.

A supporting column 20 is fixedly connected to the middle of the top surface of the round seat 18, the outer ring of the top of the supporting column 20 is fixedly connected to one end of a plurality of springs 21, the other end of each spring 21 is fixedly connected to an arc-shaped elastic sheet 19, the outer ring of the top of the supporting column 20 is fixedly connected to one end of a telescopic rod 22, the other end of the telescopic rod 22 is fixedly connected to the arc-shaped elastic sheet 19, and the inner ring of each spring 21 is sleeved on the outer ring of the telescopic rod 22; the arc-shaped elastic sheet 19 is pushed by the elastic force of the spring 21 to further clamp the test tube 2, so that the stability of the test tube 2 is further improved.

Example two

Referring to fig. 7, in a first comparative example, as another embodiment of the present invention, a plurality of groups of suction cups 23 are fixedly connected to a bottom surface of the detector body 1, and each group of suction cups 23 is arranged horizontally and longitudinally; through the sucking disc 23 that sets up, adsorb detector body 1 on the plane to the stability of detector body 1 has been improved.

The working principle is as follows: firstly, a sample to be detected is collected by using the test tube 2, the test tube 2 is inserted into the placing hole 3, so that the arc-shaped elastic sheet 19 is squeezed to be expanded towards the outer ring, the test tube 2 is clamped and fixed by the generated elastic force, the spring 21 is compressed, the generated reaction force provides extra power for the arc-shaped elastic sheet 19, and the test tube 2 is further clamped and fixed;

then, reagent is added into the liquid medicine cavity 10 through the adding pipe 14, the hydraulic cylinder 13 pushes the sliding table 5 to slide downwards along the supporting arm 4, so that the injection needle 6 is inserted into the test tube 2, the screw rod 9 is rotated, the piston 8 is pushed to slide downwards along the sliding rod 17, and the reagent in the liquid medicine cavity 10 is accurately injected into the test tube 2 through the injection needle 6; accurate reagent addition among a plurality of test tubes 2 is realized, and the detection accuracy is improved.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed.

Claims

COD on-line measuring device, its characterized in that: comprises a detector body (1), a test tube (2) and a reagent adding structure; a placing hole (3) is formed in the top surface of the detection end of the detector body (1), a test tube (2) is slidably mounted in the placing hole (3), a reagent adding structure is arranged at the detection end of the detector body (1), and the reagent adding structure is positioned right above the test tube (2);

the reagent adding structure comprises a supporting arm (4), a sliding table (5), an injection needle (6), a piston (8) and a screw (9); top surface rigid coupling support arm (4) of detector body (1), outside slidable mounting slip table (5) of support arm (4), liquid medicine chamber (10) are seted up to the inside of slip table (5), a plurality of syringe needles (6) are pegged graft to the bottom surface of slip table (5), inner circle intercommunication liquid medicine chamber (10) of syringe needle (6), the sealing plug of test tube (2) is passed to the outer lane of syringe needle (6), inside slidable mounting piston (8) of liquid medicine chamber (10), the top surface mid-rotation installation screw rod (9) of piston (8), screw hole (11) are seted up to the roof of liquid medicine chamber (10), the outer lane of screw rod (9) and the inner circle screw-thread fit of screw hole (11), the bottom filling of liquid medicine chamber (10) has the reagent, the liquid level of reagent is located the bottom of piston (8).
2. The COD on-line detecting device according to claim 1, characterized in that: spout (12) are all seted up to the both sides of support arm (4), the lateral wall sliding fit of lug and spout (12) in the recess of slip table (5), the equal rigid coupling pneumatic cylinder (13) in crossbeam both sides bottom surface of support arm (4), the top surface rigid coupling of the piston rod bottom of pneumatic cylinder (13) and slip table (5).
3. The COD on-line detecting device according to claim 2, characterized in that: the front bottom of slip table (5) rigid coupling adds pipe (14), the inner circle intercommunication liquid medicine chamber (10) that adds pipe (14), the middle part that adds pipe (14) is provided with check valve (15), the water-passing direction of check valve (15) points to liquid medicine chamber (10).
4. The COD on-line detecting device according to claim 3, characterized in that: the middle part of the piston (8) is provided with a plurality of slide holes (16), the interior of the liquid medicine cavity (10) is fixedly connected with a plurality of slide bars (17), and the outer walls of the slide bars (17) are in sliding fit with the inner walls of the slide holes (16).
5. The COD online detection device of claim 4, wherein: the test tube placing device is characterized in that the outer ring of the placing hole (3) is fixedly connected with a plurality of round seats (18), the outer ring of each round seat (18) is fixedly connected with a plurality of arc-shaped elastic sheets (19), and the arc-shaped elastic sheets (19) clamp the test tube (2).
6. The COD on-line detecting device according to claim 5, characterized in that: the top surface middle part rigid coupling support column (20) of circle seat (18), the top outer lane rigid coupling one end of a plurality of springs (21) of support column (20), the other end and the arc shell fragment (19) rigid coupling of spring (21), the top outer lane rigid coupling one end of telescopic link (22) of support column (20), the other end and the arc shell fragment (19) rigid coupling of telescopic link (22), the inner circle cover of spring (21) is in telescopic link (22) outer lane.