Detection device for ammonia water concentration

Abstract

The invention relates to the field of ammonia water detection, and discloses an ammonia water concentration detection device which comprises a box body and a box cover, the box cover is hinged to the box body, a microcomputer is installed on the upper portion of the front face of the box body, an installation cover is arranged in the middle of the lower inner wall of the box body, and a rotating structure is arranged on the installation cover. When the concentration of multiple groups of ammonia water needs to be detected to improve the detection accuracy, after a group of data is detected in the switching cylinder, the detection structure is taken out from the corresponding switching cylinder by utilizing the lifting structure, and then the next switching cylinder is switched by utilizing the rotating structure to continue to detect the concentration of the next group of ammonia water, so that the operation is labor-saving and labor-saving, and the detection working efficiency is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ammonia water detection, and in particular to a detection device for ammonia water concentration. Background Art

[0002] Ammonia water is an aqueous solution of gaseous ammonia, which is colorless, transparent and has a pungent odor; the density of ammonia water is less than that of water, it is unstable, volatile, and easily decomposed when exposed to light and heat; ammonia water itself is a liquid that does not burn and has no explosion hazard, and the ammonia gas separated from water has a strong pungent odor, which has certain irritation and corrosiveness to the eyes, nose and skin of the human body, and has the danger of combustion and explosion. When detecting the concentration of ammonia water, a detection device for ammonia water concentration is required.

[0003] In the prior art ammonia water concentration detection device, by setting a water level sensor and a color sensor, the change of ammonia water in the neutralization tank is monitored in real time through the cooperation of multiple sensors, and the calculation is carried out by a microcomputer. The whole process is simple to operate, which is convenient for quickly calculating the concentration of ammonia water and improving the detection efficiency of ammonia water concentration.

[0004] When detecting ammonia water, in order to ensure the detection accuracy, it is often necessary to detect multiple groups of ammonia water concentration data to improve the detection quality. After the prior art ammonia water detection device detects the ammonia water concentration, it is necessary to discharge the detected ammonia water, and even clean the ammonia water in the neutralization tank to avoid the problem of detection interference when detecting the next group of ammonia water concentration. This leads to time-consuming and laborious operation and reduces the detection work efficiency. Therefore, there are areas for improvement. Summary of the Invention

[0005] In order to solve the problems raised in the above background art, the present invention provides a detection device for ammonia water concentration.

[0006] The detection device for ammonia water concentration provided by the present invention adopts the following technical scheme:

[0007] A detection device for ammonia water concentration includes a box body and a box cover. The box cover is hinged to the box body. A microcomputer is installed above the front of the box body. An installation cover is arranged in the middle of the lower inner wall of the box body, and a rotating structure is arranged on the installation cover.

[0008] The rotating structure includes a first turntable rotatably installed in the middle of the upper surface of the installation cover. The top end of the first turntable is connected to a rotating cylinder. A plurality of first connecting rods are circumferentially and equally spaced on the lower side of the side surface of the rotating cylinder. The top ends of the plurality of first connecting rods are connected to an annular plate. A plurality of placement grooves are circumferentially and equally spaced on the upper surface of the annular plate. A switching cylinder is clamped in the placement groove through a clamping structure. A blocking structure is arranged in the switching cylinder, and a lifting structure is arranged in the rotating cylinder.

[0009] The lifting structure includes an electric telescopic rod installed in the middle of the inner wall of the installation cover. The top end of the output shaft of the electric telescopic rod is connected to a lifting column. The lifting column movably passes through the first turntable and the rotating cylinder. The middle of the top end of the lifting column is connected to a second connecting rod. One end of the second connecting rod is provided with a detection structure. A transmission structure is arranged between the lifting column and the rotating cylinder.

[0010] Preferably, the detection structure includes a fixed cylinder arranged at the upper right of the box body. The fixed cylinder is arranged in the box body through an installation structure. Two liquid inlet pipes are connected to the upper part of the fixed cylinder. One of the liquid inlet pipes installed with a valve fixedly passes through the box body. A communicating pipe is movably inserted into the fixed cylinder. The communicating pipe is fixedly connected to one end of the second connecting rod. A pressing cylinder is fixedly sleeved in the middle of the communicating pipe. The bottom end of the pressing cylinder is in the shape of a hollow frustum. An electric current regulating valve, a water level sensor and a color sensor are arranged on the inner wall of the communicating pipe. The electric current regulating valve, the water level sensor and the color sensor are electrically connected to a microcomputer.

[0011] Preferably, a sealing disc is fixedly sleeved on the top end of the communicating pipe inserted into the fixed cylinder. The side of the sealing disc is closely attached to the inner wall of the fixed cylinder. A sealing gasket is arranged on the lower inner wall of the fixed cylinder.

[0012] Preferably, the installation structure includes two installation rods connected to the fixed cylinder. An installation block is arranged at one end of each installation rod away from the fixed cylinder. Installation frames are fixedly installed on the inner walls of the front and back sides of the box body. The installation block is fastened in the installation frame by screws.

[0013] Preferably, the clamping structure includes a bidirectional screw rod rotatably passing through the placement groove. Second turntables are fixedly sleeved at both ends of the bidirectional screw rod passing through the circular ring plate. The two sections of threads on the bidirectional screw rod are in opposite directions. Two grooves are opened on the lower groove wall of the placement groove along the length direction of the bidirectional screw rod. The bidirectional screw rod rotatably passes through the grooves. A moving block is sleeved on the part of the bidirectional screw rod in the groove. A threaded groove for the bidirectional screw rod to pass through is opened on the moving block. An arc-shaped clamping plate is installed on the upper part of the moving block. The clamping plate clamps on the switching cylinder.

[0014] Preferably, the blocking structure includes an inner disc fixedly arranged in the middle of the inner wall of the switching cylinder. A blocking port is vertically opened at the axial center position of the inner disc. An inner groove is opened on the inner wall of the blocking port. Multiple blocking plates are movably inserted into the inner groove. Each blocking plate is in the shape of a sector. The multiple blocking plates can be spliced into a complete disc shape. Through grooves are opened above each blocking plate on the upper surface of the inner disc. The through grooves and the inner groove communicate with each other. An extrusion strip movably passing through the through groove is connected to the upper surface of each blocking plate. The upper section of the extrusion strip is in the shape of a "Z". A spring is connected between each blocking plate and the inner side groove wall of the inner groove.

[0015] Preferably, the transmission structure includes multiple third connecting rods connected to the upper edge of the lifting column. A transmission cylinder is movably sleeved on the rotating cylinder. The bottom ends of the third connecting rods are connected to the transmission cylinder. A plug rod is fixedly inserted into the upper side of the transmission cylinder. A plurality of transmission grooves are formed on the side of the rotating cylinder. Vertical grooves are respectively formed between adjacent two transmission grooves on the side of the rotating cylinder. The top end of the vertical groove is communicated with the transmission groove.

[0016] In summary, the present invention has the following beneficial technical effects:

[0017] 1. By providing a lifting structure and a rotating structure, a plurality of switching cylinders are placed on the circular ring plate of the rotating structure, and a detection structure is arranged in the box body. When it is necessary to detect multiple groups of ammonia water concentrations to improve the detection accuracy, after detecting a set of data in a switching cylinder, the detection structure can be taken out of the corresponding switching cylinder by using the lifting structure, and then the next switching cylinder can be switched by using the rotating structure to continue detecting the next group of ammonia water concentrations, which not only saves labor and effort in operation, but also improves the detection work efficiency;

[0018] 2. By providing a transmission structure, when the lifting structure drives the detection structure to move up and down, the rotating structure can be driven to rotate at the same time, so as to automatically switch the rotating cylinder for detection, and further improve the detection work efficiency;

[0019] 3. By providing a blocking structure, when the connecting pipe on the detection structure is inserted into the switching cylinder to detect the ammonia water concentration, the blocking structure is automatically pushed, so that the connecting pipe can be smoothly inserted into the switching cylinder. When the connecting pipe is lifted and pulled out of the switching cylinder, it can be automatically blocked in the switching cylinder to avoid the strong pungent smell of ammonia water from harming the detection personnel, and improve the safety of the detection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a detection device for ammonia water concentration in an embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of the rotating structure in an embodiment of the present invention;

[0022] Figure 3 is a schematic structural diagram in the placement groove in an embodiment of the present invention;

[0023] Figure 4 is in an embodiment of the present invention Figure 3 The enlarged view of the structure at A;

[0024] Figure 5 is a schematic structural diagram of the switching cylinder in an embodiment of the present invention;

[0025] Figure 6It is a schematic structural diagram of the detection structure in the embodiment of the present invention;

[0026] Figure 7 It is a schematic structural diagram inside the fixed cylinder in the embodiment of the present invention;

[0027] Figure 8 It is a schematic structural diagram at the rotating cylinder in the embodiment of the present invention;

[0028] Figure 9 It is a schematic structural diagram after the transmission cylinder is disassembled on the rotating cylinder in the embodiment of the present invention.

[0029] Explanation of reference numerals: 1, box body; 2, box cover; 3, installation cover; 4, electric telescopic rod; 5, first turntable; 6, first connecting rod; 7, circular ring plate; 8, lifting column; 9, second connecting rod; 10, placement groove; 11, switching cylinder; 12, microcomputer; 13, fixed cylinder; 14, liquid inlet pipe; 15, extrusion cylinder; 16, connecting pipe; 17, sealing disc; 18, sealing gasket; 19, installation rod; 20, installation frame; 21, installation block; 22, turntable; 23, bidirectional screw; 24, groove; 25, moving block; 26, clamping plate; 27, inner disc; 28, blocking port; 29, inner groove; 30, blocking plate; 31, through groove; 32, extrusion strip; 33, third connecting rod; 34, transmission cylinder; 35, inserting rod; 36, transmission groove; 37, vertical groove; 38, rotating cylinder. Detailed implementation manners

[0030] The following will Figures 1-9 make a further detailed description of the present invention in conjunction with the attached

[0031] Refer to Figures 1-9 , an ammonia water concentration detection device is disclosed in the embodiment of the present invention, including a box body 1 and a box cover 2, the box cover 2 is hinged on the box body 1, a microcomputer 12 is installed above the front of the box body 1, an installation cover 3 is arranged in the middle of the lower inner wall of the box body 1, and a rotating structure is arranged on the installation cover 3;

[0032] The rotating structure includes a first turntable 5 rotatably installed in the middle of the upper surface of the installation cover 3, the top end of the first turntable 5 is connected to a rotating cylinder 38, a plurality of first connecting rods 6 are circumferentially and equally spaced and connected to the lower side of the side surface of the rotating cylinder 38, the top ends of the plurality of first connecting rods 6 are connected to a circular ring plate 7, a plurality of placement grooves 10 are circumferentially and equally spaced on the upper surface of the circular ring plate 7, a switching cylinder 11 is clamped in the placement groove 10 through a clamping structure, a liquid discharge pipe with a valve is connected and installed at the bottom end of the side surface of the switching cylinder 11, which is convenient for discharging the detected ammonia water in the switching cylinder 11, a blocking structure is arranged in the switching cylinder 11, and a lifting structure is arranged in the rotating cylinder 38;

[0033] The lifting structure includes an electric telescopic rod 4 installed at the middle of the upper inner wall of the installation cover 3. The top end of the output shaft of the electric telescopic rod 4 is connected to a lifting column 8. The lifting column 8 movably passes through the first turntable 5 and the rotating cylinder 38. The middle of the top end of the lifting column 8 is connected to a second connecting rod 9. A detection structure is arranged at one end of the second connecting rod 9. A transmission structure is arranged between the lifting column 8 and the rotating cylinder 38.

[0034] The detection structure includes a fixed cylinder 13 arranged at the upper right of the box body 1. The fixed cylinder 13 is arranged in the box body 1 through an installation structure. Two liquid inlet pipes 14 are connected to the upper part of the fixed cylinder 13. One of the liquid inlet pipes 14 with a valve installed fixedly passes through the box body 1. A communicating pipe 16 is movably inserted into the fixed cylinder 13. The communicating pipe 16 is fixedly connected to one end of the second connecting rod 9. An extrusion cylinder 15 is fixedly sleeved in the middle of the communicating pipe 16. The bottom end of the extrusion cylinder 15 is in the shape of a hollow frustum. An electric current regulating valve, a water level sensor and a color sensor are arranged on the inner wall of the communicating pipe 16. The electric current regulating valve, the water level sensor and the color sensor are electrically connected to the microcomputer 12. After starting the electric telescopic rod 4 to drive the bottom end of the communicating pipe 16 to insert into the switching cylinder 13, ammonia water to be detected is introduced into the switching cylinder 11 through one of the liquid inlet pipes 14. After introducing the ammonia water, methyl orange solution is introduced into the switching cylinder 11 through the communicating pipe 16. The ammonia water is neutralized in the switching cylinder 11. The monitoring signal is sent to the microcomputer 12 by the water level sensor for recording. At this time, hydrochloric acid is slowly incorporated into the switching cylinder 11 through the other liquid inlet pipe 14. As the hydrochloric acid is continuously added, the alkalinity of the solution is gradually neutralized, and the extension of methyl orange will change from yellow to orange. In order to accurately determine the end point of the neutralization of ammonia water by hydrochloric acid, hydrochloric acid needs to be continuously added slowly until the color of the solution does not change within about 30 seconds. At this time, the color sensor will monitor the liquid and send a signal to the microcomputer 12. At this time, the microcomputer 12 can calculate the concentration of ammonia water according to the volume of hydrochloric acid consumed during the addition of hydrochloric acid. After the ammonia water concentration in the switching cylinder 11 is detected, the electric telescopic rod 4 takes out the communicating pipe 16 from the corresponding switching cylinder 11. By rotating the first turntable 5 on the installation cover 3, the ring plate 7 directly rotates and switches the next switching cylinder 11 up and down to the position directly below the communicating pipe 16, and continues to carry out the detection work of ammonia water concentration. This operation is time-saving and labor-saving, and improves the detection work efficiency.

[0035] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 and Figure 7, a connecting pipe 16 is inserted into the top end inside a fixed cylinder 13, and a sealing disc 17 is fixedly sleeved thereon. The side of the sealing disc 17 is closely attached to the inner wall of the fixed cylinder 13. A sealing gasket 18 is arranged on the lower inner wall of the fixed cylinder 13. When the connecting pipe 16 moves downward in the fixed cylinder 13 and is inserted into the switching cylinder 11, it drives the sealing disc 17 to move downward and press tightly against the sealing gasket 18, so as to play a sealing role and reduce the problem of leakage.

[0036] The installation structure includes two mounting rods 19 connected to the fixed cylinder 13. At one end of each mounting rod 19 away from the fixed cylinder 13, a mounting block 21 is arranged. Mounting frames 20 are fixedly installed on the inner walls of the front and rear sides of the box body 1. The mounting block 21 is fastened in the mounting frame 20 by screws. The mounting block 21 is installed in the mounting frame 20 by screws, so as to fixedly install the fixed cylinder 11 inside the box body 1.

[0037] The clamping structure includes a bidirectional screw rod 23 rotatably passing through the placing groove 10. Second turntables 22 are fixedly sleeved on both ends of the bidirectional screw rod 23 passing through the circular ring plate 7. The two sections of threads on the bidirectional screw rod 23 have opposite directions. Two grooves 24 are opened on the lower groove wall of the placing groove 10 along the length direction of the bidirectional screw rod 23. The bidirectional screw rod 23 rotatably passes through the grooves 24. A moving block 25 is sleeved on the part of the bidirectional screw rod 23 inside the groove 24. A threaded groove for the bidirectional screw rod 23 to pass through is opened on the moving block 25. An arc-shaped clamping plate 26 is installed on the upper surface of the moving block 25. The clamping plate 26 clamps on the switching cylinder 11. After the switching cylinder 11 is placed into the placing groove 10, the second turntable 22 is used to rotate the bidirectional screw rod 23. The two moving blocks 25 move on the rotating bidirectional screw rod 23, driving the two clamping plates 26 to move towards each other, so as to clamp and fix the switching cylinder 11 in the placing groove 10, making the installation or disassembly operation of the switching cylinder 11 on the circular ring plate 7 simpler, facilitating the removal of the switching cylinder 11 from the circular ring plate 7, discharging the ammonia water after detection in the switching cylinder 11, and carrying out centralized treatment.

[0038] See Figure 1 、 Figure 2 、 Figure 5 、 Figure 8 and Figure 9, the plugging structure includes an inner disk 27 fixedly arranged at the middle of the inner wall of the switching cylinder 11. A plugging opening 28 is vertically formed at the axial center position of the inner disk 27. An inner groove 29 is formed on the inner wall of the plugging opening 28. Multiple plugging plates 30 are movably inserted into the inner groove 29. Each plugging plate 30 is in a fan shape. Multiple plugging plates 30 can be spliced into a complete disk shape. Through grooves 31 are formed above each plugging plate 30 on the upper surface of the inner disk 27. The through grooves 31 communicate with the inner groove 29. An extrusion strip 32 that movably passes through the through groove 31 is connected to the upper surface of each plugging plate 30. The upper section of the extrusion strip 32 is in a "Z" shape. A spring is connected between each plugging plate 30 and the inner side wall of the inner groove 29. When the connecting pipe 16 is inserted into the switching cylinder 11, the extrusion cylinder 15 on the connecting pipe 16 extrudes the extrusion strip 32. The extrusion strip 32 drives multiple plugging plates 30 to move away from each other, thereby opening the plugging opening 28, so that the connecting pipe 16 can be smoothly inserted into the switching cylinder 11 for the detection work of ammonia water. And when the connecting pipe 16 is pulled out of the switching cylinder 11, the extrusion cylinder 15 gradually disengages from the extrusion strip 32. Under the elastic force of the spring, the plugging plates 30 are pushed to move reversely and spliced together, thereby plugging the plugging opening 28, reducing the leakage of the pungent smell of ammonia water, and damaging the physical health of the detection personnel, and improving the safety of the detection work;

[0039] The transmission structure includes multiple third connecting rods 33 connected to the edge of the upper surface of the lifting column 8. A transmission cylinder 34 is movably sleeved on the rotating cylinder 38. The bottom end of the third connecting rod 33 is connected to the transmission cylinder 34. A plug rod 35 is fixedly inserted above the side surface of the transmission cylinder 34. Multiple transmission grooves 36 are formed on the side surface of the rotating cylinder 38. Vertical grooves 37 are respectively formed between adjacent two transmission grooves 36 on the side surface of the rotating cylinder 38. The top end of the vertical groove 37 communicates with the transmission groove 36 (the shape of the transmission groove 36 is as Figure 9 shown). When starting the electric telescopic rod 4 to drive the lifting column 8 to move upward to pull out the connecting pipe 16 from the switching cylinder 11, one end of the plug rod 35 on the transmission cylinder 34 driven by the third connecting rod 33 slides upward in the vertical groove 37 and the transmission groove 36. By using the extrusion of the plug rod 35 on the groove wall of the transmission groove 36, the rotating cylinder 38 is pushed to drive the circular ring plate 7 to rotate. And when the lifting column 8 moves downward, the extrusion of one end of the plug rod 35 on the groove wall of the transmission groove 36 continues to drive the circular ring plate 7 to rotate, thereby automatically rotating and switching the next switching cylinder 11 to the position directly below the connecting pipe 16. In this way, as the lifting column 8 continues to move downward, driving the plug rod 35 to move downward in the corresponding vertical groove 37, the connecting pipe 16 can be smoothly inserted into the switching cylinder 11 for the detection work.

[0040] The implementation principle of a detection device for ammonia water concentration in an embodiment of the present invention is as follows: First, start the electric telescopic rod 4 to drive the lifting column 8 to move downward in the rotating cylinder 38, driving one end of the insertion rod 35 on the transmission cylinder 34 to slide downward in the transmission groove 36. By using the extrusion of one end of the insertion rod 35 on the lower groove wall of the transmission groove 36, the rotating cylinder 38 and the circular ring plate 7 as a whole are driven to rotate, thereby driving the corresponding switching cylinder 11 on the circular ring plate 7 to move downward to a position directly below the communication pipe 16. Then, the electric telescopic rod 4 continues to drive the lifting column 8 to move downward to drive the communication pipe 16 to insert into the switching cylinder 11. During the downward movement of the communication pipe 16, the extrusion cylinder 15 is driven to squeeze the extrusion strip 32, and through the extrusion strip 32, multiple sealing plates 30 are driven to move away from each other, thereby opening the sealing port 28, enabling the communication pipe 16 to smoothly insert into the switching cylinder 11. At this time, the insertion rod 35 slides downward in the corresponding vertical groove 37 on the rotating cylinder 38, and the circular ring plate 7 remains in place. And when the bottom end of the communication pipe 16 abuts against the lower inner wall of the switching cylinder 11, the sealing disk 17 at the top end of the communication pipe 16 abuts against the sealing gasket 18 to ensure the sealing between the communication pipe 16 and the fixed cylinder 13. Then, the ammonia water to be detected is introduced into the switching cylinder 11 through one of the liquid inlet pipes 14. After introducing the ammonia water, the methyl orange solution is introduced into the switching cylinder 11 through the communication pipe 16 to neutralize the ammonia water in the switching cylinder 11. The monitoring signal is sent to the microcomputer 12 by the water level sensor for recording. At this time, hydrochloric acid is slowly incorporated into the switching cylinder 11 through the other liquid inlet pipe 14. As the hydrochloric acid is continuously added, the alkalinity of the solution is gradually neutralized, and the extension of methyl orange will change from yellow to orange. In order to accurately determine the end point of the neutralization of ammonia water by hydrochloric acid, hydrochloric acid needs to be continuously and slowly added until the color of the solution does not change within about 30 seconds. At this time, the color sensor will monitor the liquid and send a signal to the microcomputer 12. At this time, the microcomputer 12 can calculate the concentration of ammonia water according to the volume of hydrochloric acid consumed during the addition of hydrochloric acid. After the detection, the electric telescopic rod 4 drives the communication pipe 16 to move upward and withdraw from the switching cylinder 11, driving one end of the insertion rod 35 to slide upward in the vertical groove 37 and the transmission groove 36. After the communication pipe 16 is withdrawn from the switching cylinder 11, the circular ring plate 7 can continue to be driven to rotate. And when detecting the next group of ammonia water, the electric telescopic rod 4 drives the communication pipe 16 to move downward, driving one end of the insertion rod 35 to move downward in the corresponding transmission groove 36 and vertical groove 37 to continue driving the circular ring plate 7 to rotate, thereby automatically rotating and switching the next switching cylinder 11 on the circular ring plate 7 to a position directly below the communication pipe 16 for ammonia water concentration detection work. In this way, the detection work is more time-saving and labor-saving, improving the detection work efficiency.

[0041] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A device for detecting ammonia concentration, comprising a box body (1) and a box cover (2), characterized in that: The box body (1) is hingedly connected with a box cover (2); a microcomputer (12) is installed at the upper front of the box body (1); a mounting cover (3) is provided in the middle of the lower inner wall of the box body (1); and a rotating structure is provided on the mounting cover (3); The rotating structure comprises a first rotating disk (5) rotatably mounted in the middle of the mounting cover (3), the top end of the first rotating disk (5) being connected to a rotating cylinder (38), a plurality of first connecting rods (6) being connected to the lower side of the rotating cylinder (38) at equal intervals on the circumference, the top ends of the plurality of first connecting rods (6) being connected to a circular plate (7), a plurality of placement grooves (10) being provided at equal intervals on the circumference of the circular plate (7), a switching cylinder (11) being clamped in the placement grooves (10) by a clamping structure, a blocking structure being provided in the switching cylinder (11), and a lifting structure being provided in the rotating cylinder (38); The lifting structure comprises an electric telescopic rod (4) mounted at the middle of the inner wall of the mounting cover (3); the top end of the output shaft of the electric telescopic rod (4) is connected to a lifting column (8); the lifting column (8) movably passes through the first turntable (5) and the rotating cylinder (38); the middle of the top end of the lifting column (8) is connected to a second connecting rod (9); a detection structure is arranged at one end of the second connecting rod (9); and a transmission structure is arranged between the lifting column (8) and the rotating cylinder (38).

2. A device for detecting ammonia concentration according to claim 1, characterized in that: The detection structure comprises a fixed cylinder (13) arranged at the upper right part of the box body (1), the fixed cylinder (13) being arranged in the box body (1) through a mounting structure, two liquid inlet pipes (14) being connected to the upper part of the fixed cylinder (13), one of the liquid inlet pipes (14) having a valve mounted thereon being fixedly passed through the box body (1), a connecting pipe (16) being movably inserted into the fixed cylinder (13), the connecting pipe (16) being fixedly connected to one end of a second connecting rod (9), an extrusion cylinder (15) being fixedly sleeved at the middle part of the connecting pipe (16), the bottom end of the extrusion cylinder (15) being in the shape of a hollow frustum, an electric current regulating valve, a water level sensor and a color sensor being arranged on the inner wall of the connecting pipe (16), the electric current regulating valve, the water level sensor and the color sensor being electrically connected to a microcomputer (12).

3. A detection device for ammonia concentration according to claim 2, characterized in that: The connecting pipe (16) is inserted into the fixed tube (13), and a sealing disk (17) is fixedly sleeved on the top end thereof. The side surface of the sealing disk (17) is tightly attached to the inner wall of the fixed tube (13), and a sealing gasket (18) is provided on the lower inner wall of the fixed tube (13).

4. A device for detecting ammonia concentration according to claim 2, characterized in that: The mounting structure comprises two mounting rods (19) connected to the fixing tube (13), each mounting rod (19) being provided with a mounting block (21) at one end away from the fixing tube (13), and mounting frames (20) being fixedly mounted on the inner walls on both the front and rear sides of the box body (1), and the mounting blocks (21) being fastened in the mounting frames (20) by means of screws.

5. The device for detecting ammonia concentration according to claim 1, characterized in that: The clamping structure comprises a bidirectional screw (23) that rotates through the placement groove (10); a second rotating disk (22) is fixedly sleeved on both ends of the bidirectional screw (23) that pass through the circular ring plate (7); two sections of threads on the bidirectional screw (23) have opposite directions; two grooves (24) are provided on the lower groove wall of the placement groove (10) along the length direction of the bidirectional screw (23); the bidirectional screw (23) rotates through the groove (24); a moving block (25) is sleeved on the part of the bidirectional screw (23) in the groove (24); a thread groove for the bidirectional screw (23) to pass through is provided on the moving block (25); an arc-shaped clamping plate (26) is installed on the upper surface of the moving block (25); the clamping plate (26) is clamped on the switching cylinder (11).

6. A device for detecting ammonia concentration according to claim 1, characterized in that: The blocking structure comprises an inner disk (27) fixedly arranged at the middle of the inner wall of the switching cylinder (11); a blocking opening (28) is vertically opened at the axial position of the inner disk (27); an inner groove (29) is opened on the inner wall of the blocking opening (28); a plurality of blocking plates (30) are movably inserted into the inner groove (29); each of the blocking plates (30) is in a fan shape; the plurality of blocking plates (30) can be spliced ​​into a complete disc shape; a through groove (31) is opened on the inner disk (27) above each of the blocking plates (30); the through groove (31) and the inner groove (29) are connected to each other; each of the blocking plates (30) is connected to an extrusion strip (32) movably passing through the through groove (31); the upper section of the extrusion strip (32) is in a "Z" shape; and a spring is connected between each of the blocking plates (30) and the inner groove wall of the inner groove (29).

7. The device for detecting ammonia concentration according to claim 1, characterized in that: The transmission structure comprises a plurality of third connecting rods (33) connected to the upper edge of the lifting column (8); a transmission cylinder (34) is movably sleeved on the rotating cylinder (38); the bottom end of the third connecting rod (33) is connected to the transmission cylinder (34); an insertion rod (35) is fixedly inserted into the upper side of the transmission cylinder (34); a plurality of transmission grooves (36) are provided on the side of the rotating cylinder (38); vertical grooves (37) are respectively provided on the side of the rotating cylinder (38) between two adjacent transmission grooves (36); and the top ends of the vertical grooves (37) are communicated with the transmission grooves (36).

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