CN215953355U - Solution concentration detection device - Google Patents

Abstract

The utility model provides a solution concentration detection device, which comprises a shading shell, a transparent sampling tube, a strong light emitting device, a light intensity receiving device and a processor, wherein the shading shell is arranged on the transparent sampling tube; the shading shell comprises a bottom plate, a top plate and side plates, and the bottom plate, the top plate and the side plates jointly enclose to form an inner cavity; the transparent sampling tube is arranged in the inner cavity; the strong light emitting device and the light intensity receiving device are oppositely arranged on two sides of the transparent sampling tube; the processor is connected with the light intensity receiving device to acquire the concentration of the solution to be detected in the transparent sampling tube. The utility model transmits light to the solution to be detected through the strong light transmitting device, the light intensity receiving device receives the light penetrating through the solution to be detected and converts the collected light intensity signal into an electric signal, and the processor finally calculates the concentration of the solution to be detected according to the relation between the electric signal and the concentration input in advance; and the shading shell effectively avoids the interference of external light to the light intensity receiving device, and improves the accuracy of solution concentration detection.

Description

Solution concentration detection device

Technical Field

The utility model belongs to the technical field of preparation of release agents, and particularly relates to a solution concentration detection device.

Background

With the rapid development of vehicle lightweight and 5G communication, the structures of vehicle body structural parts, new energy parts, 5G communication parts and other pressure casting products are more and more complex, and the requirements on pressure casting equipment are higher. In the production process of the die-casting product, the demolding quality of the die-casting product directly influences the qualification rate of the die-casting product, and the demolding quality of the die-casting product is greatly influenced by the demolding agent, particularly the concentration of the demolding agent. The low concentration of the release agent can lead to the unsmooth release of the die-casting product, so that the die-casting product is stuck and damaged, and the surface damage occurs; the higher concentration can cause the paint on the surface of the product to accumulate to generate variegated colors, and can also cause the waste of the release agent, thereby increasing the cost. Based on the above, the utility model provides a device capable of accurately detecting the concentration of the solution so as to ensure that the concentration of the release agent meets the requirement.

SUMMERY OF THE UTILITY MODEL

In view of the above drawbacks of the prior art, an object of the present invention is to provide a solution concentration detecting device, which emits light to a solution to be detected through an intense light emitting device, the solution to be detected absorbs a part of the light, so that only a part of the light is collected by a light intensity receiving device after passing through the solution to be detected, the light intensity receiving device converts a collected light intensity signal into an electrical signal, and a processor calculates the concentration of the solution to be detected according to a relationship between the electrical signal and the concentration input in advance.

In order to achieve the above and other related objects, the present invention provides a solution concentration detecting device, which includes a light shielding shell, a transparent sampling tube for storing a solution to be detected, a strong light emitting device for emitting light to the solution to be detected in the transparent sampling tube, a light intensity receiving device for receiving the light transmitted through the solution to be detected, and a processor; the shading shell comprises a bottom plate, a top plate and side plates, and the bottom plate, the top plate and the side plates jointly enclose to form an inner cavity; the transparent sampling tube is arranged in the inner cavity of the shading shell; the strong light emitting device and the light intensity receiving device are oppositely arranged on two sides of the transparent sampling tube; the processor is connected with the light intensity receiving device to acquire the concentration of the solution to be detected in the transparent sampling tube. The utility model transmits light to the solution to be detected through the strong light transmitting device, the solution to be detected can absorb a part of light, only a part of light penetrates through the solution to be detected and is collected by the light intensity receiving device, the light intensity receiving device converts the collected light intensity signal into an electric signal, and the processor finally calculates the concentration of the solution to be detected according to the relation between the electric signal and the concentration which are input in advance; and the arrangement of the shading shell not only avoids the interference of external light to the light intensity receiving device, but also prevents impurities such as external dust and the like from being attached to the transparent sampling tube to absorb or reflect light, thereby ensuring the accuracy of solution concentration detection.

Preferably, the solution concentration detection device comprises a sampling head and a piston assembly, and a solution inlet and a solution outlet communicated with the interior of the transparent sampling tube are formed in the bottom end of the transparent sampling tube; the bottom end of the sampling head is positioned below the bottom plate, and the sampling head is communicated with the solution inlet and the solution outlet to form a solution inlet and outlet channel; the piston assembly comprises a piston and a linear driving assembly for driving the piston to reciprocate, the linear driving assembly comprises a piston rod, and the bottom end of the piston rod is connected with the piston; the piston is movably arranged in the transparent sampling tube, and the periphery of the piston is abutted against the inner wall of the transparent sampling tube; the top plate is provided with a first through hole for the piston rod to pass through; according to the utility model, the piston is arranged in the transparent sampling tube, so that the solution to be detected can be conveniently extracted or discharged on site, the back and forth movement of detection personnel between a laboratory and the site is avoided, the detection efficiency is improved, the risk of pollution of the solution to be detected is reduced, and the cost increased due to the pollution discharge of the solution to be detected is avoided; meanwhile, the piston is in close contact with the inner wall of the transparent sampling tube, so that the inner wall of the transparent sampling tube can be scraped and cleaned through the reciprocating motion of the piston, and the cleaning efficiency and the cleaning effect are improved.

Preferably, the sampling head comprises a drainage tube and a sampling nozzle, a threaded joint is fixed at the bottom of the bottom plate, a second through hole communicated with the solution inlet and outlet is formed in the bottom plate, a third through hole communicated with the second through hole is formed in the threaded joint, the top end of the drainage tube is fixed in the third through hole, and the bottom end of the drainage tube extends out of the threaded joint and then is connected with the sampling nozzle, so that the sampling nozzle is communicated with the interior of the transparent sampling tube through the drainage tube, the third through hole, the second through hole, the solution inlet and the solution outlet in sequence to form a solution inlet and outlet channel, and the solution to be detected is conveniently sucked into or discharged out of the transparent sampling tube; due to the arrangement of the threaded joint, the whole solution concentration detection device can be conveniently arranged on a conveying pipeline for storing a container for the solution to be detected, so that the cleanliness of the solution to be detected is ensured, the detection result is prevented from being influenced by external dust, and the solution can be directly returned to the container for storing the solution to be detected after the solution detection is finished, so that the cost caused by the waste of the solution is avoided; meanwhile, the drainage tube is connected with the bottom plate through the threaded connector, so that the drainage tube is prevented from directly bearing the weight of the whole solution concentration detection device, and the service life of the drainage tube is prolonged.

Preferably, the sampling head includes drainage tube and sample mouth, the drainage tube is fixed in the bottom of transparent sampling tube to with solution import and export intercommunication, be equipped with the second through-hole that supplies the drainage tube to pass on the bottom plate, the sample mouth is fixed in the bottom of drainage tube, and is fixed with threaded joint on the drainage tube, threaded joint is located between bottom plate and the sample mouth, is convenient for install whole solution concentration detection device on depositing the pipeline who treats solution container through threaded joint to guarantee the cleanliness factor of solution that awaits measuring, when avoiding external dust to influence the testing result, also guarantee that solution can directly return to after detecting the completion to deposit and treat solution container, avoid because of the extravagant cost that produces of solution.

Preferably, the sampling nozzle is a conical nozzle so as to reduce the flowing resistance of the solution to be detected in the sampling nozzle and improve the adsorption force.

Preferably, the piston comprises a piston body and an O-shaped sealing ring, an annular groove is formed in the periphery of the piston body, the O-shaped sealing ring is installed in the annular groove, the piston is in close contact with the inner wall of the transparent sampling tube through the O-shaped sealing ring, a good sealing effect is guaranteed, the piston plays a role in cleaning the inner wall of the transparent sampling tube when reciprocating in the transparent sampling tube, and the cleanliness of the inner wall of the transparent sampling tube is guaranteed.

Preferably, the bottom of the top plate and the top of the bottom plate are oppositely provided with positioning blind holes, and the upper end and the lower end of the transparent sampling tube are respectively clamped in the two positioning blind holes; the first through hole is communicated with the positioning blind hole in the top plate to form a stepped hole, and the second through hole is communicated with the positioning blind hole in the bottom plate to form a stepped hole. Carry on spacingly through the location blind hole on roof and the bottom plate to transparent sampling tube, when both preventing the piston rod motion, transparent sampling tube follow-up influences the extraction or the emission of being surveyed solution, is convenient for change transparent sampling tube again.

Preferably, location blind hole bottom is opened there is the sealing washer mounting groove, be equipped with in the sealing washer mounting groove with transparent sampling tube in close contact with's sealing washer avoids the air to get into transparent sampling tube inside from the gap between transparent sampling tube and bottom plate and the roof, and the influence is surveyed absorption and emission of solution.

Preferably, the strong light emitting device and the light intensity receiving device are oppositely arranged on a side plate of the shading shell, the strong light emitting device comprises a light source, and a fourth through hole for the light source to extend into the inner cavity is formed in the side plate; the light intensity receiving device comprises a light detector capable of converting light signals into electric signals, a fifth through hole for allowing the light rays of the solution to be measured to pass through is formed in the side plate, the light detector is aligned to the fifth through hole, the light source, the light detector and the transparent glass tube are all located in the inner cavity of the shading shell, and the influence of the external light rays on the measuring result is reduced.

Preferably, the light detector is a photodiode, a phototriode or a photoresistor, which is convenient for a user to select according to needs.

Preferably, be equipped with the observation hole that is used for observing transparent interior solution of sampling tube on the curb plate, be equipped with on the curb plate and open or close the shading lid of observation hole is convenient for observe transparent interior solution volume of sampling tube and meet the requirements.

Preferably, the linear driving device is a cylinder or an electric push rod, and the piston rod is detachably and fixedly connected with the piston to realize automatic extraction and discharge of the solution and reduce the workload of operators.

Preferably, the processor is provided with a display for displaying the obtained concentration of the solution to be detected, so that an operator can adjust the concentration of the solution according to the displayed concentration value to achieve the purpose of accurate proportioning.

As described above, the solution concentration detection apparatus of the present invention has the following advantageous effects:

(1) the utility model transmits light to the solution to be detected through the strong light transmitting device, the solution to be detected can absorb a part of light, only a part of light penetrates through the solution to be detected and is collected by the light intensity receiving device, the light intensity receiving device converts the collected light intensity signal into an electric signal, and the processor finally calculates the concentration of the solution to be detected according to the relation between the electric signal and the concentration which are input in advance; the arrangement of the shading shell not only effectively avoids the interference of external light to the light intensity receiving device, but also avoids the foreign matters such as external dust and the like from adhering to the transparent sampling tube to influence the transmission of the light, thereby improving the accuracy of the solution concentration detection;

(2) the piston is arranged in the transparent sampling tube, so that the solution to be detected can be conveniently extracted or discharged on site, continuous detection is realized, detection personnel are prevented from going back and forth between a laboratory and the site, the detection efficiency is improved, the risk of pollution of the solution to be detected is reduced, and the cost for dumping the solution to be detected due to pollution is avoided; meanwhile, the inner wall of the transparent sampling tube is scraped by utilizing the reciprocating motion of the piston, so that the aim of cleaning the inner wall of the transparent sampling tube can be fulfilled, and the cleaning efficiency is improved;

(3) the arrangement of the threaded joint is convenient for mounting the whole solution concentration detection device on a conveying pipeline for storing a container for the solution to be detected, so that the cleanliness of the solution to be detected is ensured, the detection result is prevented from being influenced by external dust, and the solution can be directly returned to the container for storing the solution to be detected after the detection is finished, so that the cost caused by the waste of the solution is avoided;

(4) all parts of the device are detachably connected, so that the device is convenient for batch production and processing.

Drawings

Fig. 1 is a perspective view of a solution concentration detection apparatus of the present invention.

Fig. 2 is an exploded view of the solution concentration detection apparatus of the present invention.

Fig. 3 is a front sectional view of the solution concentration detection apparatus of the present invention.

Fig. 4 is a perspective view of the piston.

Fig. 5 is a perspective view of the piston with the O-ring removed.

Fig. 6 is a cross-sectional view of the base plate.

Fig. 7 is a cross-sectional view of the top plate.

Description of the reference numerals

The light shielding shell 1, the bottom plate 11, the second through hole 11a, the positioning blind hole 11b, the sealing ring installation groove 11c, the connector installation hole 11d, the slot 111, the top plate 12, the first through hole 12a, the side plate 13, the fourth through hole 131, the fifth through hole 132, the observation hole 133, the transparent sampling tube 2, the strong light emitting device 3, the light source 31, the light intensity receiving device 4, the light detector 41, the piston assembly 5, the piston 51, the piston body 511, the installation hole 511a, the annular groove 511b, the O-shaped sealing ring 512, the piston rod 52, the sampling head 6, the drainage tube 61, the piston nozzle 62, the threaded connector 7, and the third through hole 7 a.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1 to 7. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1 and fig. 3, the present invention provides a solution concentration detection device, which comprises a light shielding shell 1, a transparent sampling tube 2 for storing a solution to be detected, a strong light emitting device 3 for emitting light to the solution to be detected in the transparent sampling tube 2, a light intensity receiving device 4 for receiving the light penetrating through the solution to be detected, and a processor; the shading shell 1 comprises a bottom plate 11, a top plate 12 and side plates 13, wherein the bottom plate 11, the top plate 12 and the side plates 13 jointly enclose to form an inner cavity; the transparent sampling tube 2 is arranged in the inner cavity of the shading shell 1; the strong light emitting device 3 and the light intensity receiving device 4 are oppositely arranged at two sides of the transparent sampling tube 2; the processor is connected with the light intensity receiving device 4 to obtain the concentration of the solution to be tested in the transparent sampling tube 2.

It is understood that the transparent sampling tube 2 is made of transparent material such as transparent glass, transparent polypropylene, transparent polyethylene, etc., but not limited thereto, and the transparent glass tube is preferably used in this embodiment.

It will be understood that the cross section of the transparent sampling tube 2 is in a regular hexagonal or square or circular etc. centrosymmetric pattern, which is not limited to this, and the embodiment is preferably configured to be circular.

As shown in fig. 2, the bottom plate 11 and the top plate 12 are square plates, the side plate 13 includes a front side plate, a rear side plate, a left side plate and a right side plate, and the bottom plate 11, the top plate 12, the front side plate, the rear side plate, the left side plate and the right side plate together enclose to form a light shielding shell 1 in a regular quadrangular prism shape; the bottom plate 11 and the top plate 12 are oppositely provided with slots 111 for mounting the side plates 13, so that the positioning and mounting of the side plates 13 are facilitated; the bottom plate 11, the side plate 13 and the top plate 12 are connected through bolts, so that the assembly, disassembly and processing are facilitated.

It is understood that the light shielding shell 1 may be configured as a cylinder or other regular prism, which is not limited to this.

As shown in fig. 2 and 3, the solution concentration detection device comprises a sampling head 6 and a piston assembly 5, wherein a solution inlet and a solution outlet communicated with the interior of the transparent sampling tube are arranged at the bottom end of the transparent sampling tube 2; the bottom end of the sampling head 6 is positioned below the bottom plate 11, and the sampling head 6 is communicated with the solution inlet and outlet to form a solution inlet and outlet channel; the piston assembly 5 comprises a piston 51 and a linear driving assembly for driving the piston 51 to reciprocate, the linear driving assembly comprises a piston rod 52, and the bottom end of the piston rod 52 is connected with the piston 51; the piston 51 is movably arranged in the transparent sampling tube 2, and the periphery of the piston 51 is abutted against the inner wall of the transparent sampling tube 2; the top plate 12 is provided with a first through hole 12a through which the piston rod 52 passes.

It will be appreciated that there are two types of linear drive assemblies, the first being a single piston rod, which can only be driven manually; the second type is a reciprocating linear motion device that can be automatically driven, such as an air cylinder, an electric push rod, etc., and this is not limited, and this embodiment is preferably configured as an air cylinder.

As shown in fig. 2, when the linear driving assembly is a cylinder, the cylinder includes a cylinder body and a piston rod 52 reciprocating in the cylinder body, the cylinder body includes a first cylinder body and a second cylinder body, an outer diameter of the first cylinder body is adapted to an inner diameter of the first through hole 12a, and the outer diameter of the first cylinder body is smaller than that of the second cylinder body, so that the whole cylinder body forms a stepped structure, which facilitates positioning and installation of the cylinder by using the stepped structure of the cylinder body.

As shown in fig. 4 and 5, the piston 51 includes a piston body 511 and an O-ring 512, the top of the piston body 511 is provided with a mounting hole 511a into which the piston rod 52 is inserted, the outer periphery of the piston body 511 is provided with an annular groove 511b, and the O-ring 512 is mounted in the annular groove 511 b.

As shown in fig. 6 and 7, the bottom of the top plate 12 and the top of the bottom plate 11 are provided with positioning blind holes 11b, and the upper end and the lower end of the transparent sampling tube 2 are respectively clamped in the two positioning blind holes 11b to limit and fix the transparent sampling tube 2; the first through hole 12a is communicated with the positioning blind hole 11b on the top plate 12 to form a stepped hole.

As shown in fig. 6 and 7, a sealing ring mounting groove 11c is formed at the bottom of the positioning blind hole 11b, and a sealing ring in close contact with the transparent sampling tube 2 is arranged in the sealing ring mounting groove 11c, so that the suction force is prevented from being influenced by the external air.

As shown in fig. 3 and 6, the sampling head 6 includes a drainage tube 61 and a sampling nozzle 62, the bottom of the bottom plate 11 is provided with a connector mounting hole 11d, a screw connector 7 is fixed in the connector mounting hole 11d, the bottom plate 11 is provided with a second through hole 11a communicated with the solution inlet and outlet, and the second through hole 11a is communicated with a positioning blind hole 11b on the bottom plate 11 to form a stepped hole; the threaded connector 7 is provided with a third through hole 7a communicated with the second through hole 11a, the upper end of the drainage tube 61 is fixed in the third through hole 7a, and the lower end of the drainage tube 61 extends out of the threaded connector 7 and then is connected with the sampling nozzle 62.

In another embodiment, the sampling head 6 comprises a drainage tube 61 and a sampling nozzle 62, the drainage tube 61 is fixed at the bottom end of the transparent sampling tube 2 and is communicated with the solution inlet and outlet, the bottom plate 11 is provided with a second through hole 11a for the drainage tube 61 to pass through, and the second through hole 11a is communicated with the positioning blind hole 11b on the bottom plate 11 to form a stepped hole; the sampling nozzle 62 is fixed at the bottom end of the drainage tube 61, a threaded joint 7 is fixed on the drainage tube 61, and the threaded joint 7 is positioned between the bottom plate 11 and the sampling nozzle 62.

It will be appreciated that the sampling nozzle 62 is a tapered nozzle to reduce the resistance to flow of the liquid being measured within the sampling nozzle 62, thereby improving suction.

As shown in fig. 2 and 3, the strong light emitting device 3 and the light intensity receiving device 4 are oppositely arranged on the left side plate and the right side plate of the light shielding shell 1; the strong light emitting device 3 comprises a light source 31, and a fourth through hole 131 for the light source 31 to extend into the internal cavity is formed in the left side plate; the light intensity receiving device 4 includes a light detector 41 for converting a light intensity signal into an electrical signal, a fifth through hole 132 for allowing the light passing through the solution to be detected to pass through is formed in the right side plate 13, and the light detector 41 is aligned with the fifth through hole 132.

It is understood that the light source 31 is a light emitting diode or the like that can emit parallel light, and is not limited thereto.

It is understood that the light detector 41 is a photodiode, a phototriode, a photoresistor or other photosensitive elements, but not limited thereto, and the photodiode capable of converting the light intensity signal into the voltage signal is preferably used in this embodiment.

As shown in FIG. 1, the side plate 13 is provided with an observation hole 133 for observing the solution in the transparent sampling tube 2, and the side plate 13 is provided with a light-shielding cover capable of opening or closing the observation hole 133.

Furthermore, the transparent sampling tube 2 is provided with scale marks, so that an operator can accurately know the volume of the solution to be detected in the transparent sampling tube 2.

Furthermore, a display for displaying the obtained concentration of the solution to be detected is arranged on the processor.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (13)

1. The solution concentration detection device is characterized by comprising a shading shell (1), a transparent sampling tube (2) for storing a solution to be detected, a strong light emitting device (3) for emitting light to the solution to be detected in the transparent sampling tube (2), a light intensity receiving device (4) for receiving the light penetrating through the solution to be detected and a processor; the shading shell (1) comprises a bottom plate (11), a top plate (12) and side plates (13), wherein the bottom plate (11), the top plate (12) and the side plates (13) jointly enclose to form an inner cavity; the transparent sampling tube (2) is arranged in the inner cavity of the shading shell (1); the strong light emitting device (3) and the light intensity receiving device (4) are oppositely arranged on two sides of the transparent sampling tube (2); the processor is connected with the light intensity receiving device (4) to obtain the concentration of the solution to be detected in the transparent sampling tube (2).

2. The solution concentration detection device according to claim 1, wherein the solution concentration detection device comprises a sampling head (6) and a piston assembly (5), and the bottom end of the transparent sampling tube (2) is provided with a solution inlet and a solution outlet communicated with the interior of the transparent sampling tube; the bottom end of the sampling head (6) is positioned below the bottom plate (11), and the sampling head (6) is communicated with the solution inlet and outlet to form a solution inlet and outlet channel; the piston assembly (5) comprises a piston (51) and a linear driving assembly for driving the piston (51) to reciprocate, the linear driving assembly comprises a piston rod (52), and the bottom end of the piston rod (52) is connected with the piston (51); the piston (51) is movably arranged in the transparent sampling tube (2), and the periphery of the piston (51) is abutted against the inner wall of the transparent sampling tube (2); the top plate (12) is provided with a first through hole (12a) for the piston rod (52) to pass through.

3. The solution concentration detection device according to claim 2, wherein the sampling head (6) comprises a drainage tube (61) and a sampling nozzle (62), a threaded joint (7) is fixed at the bottom of the bottom plate (11), a second through hole (11a) communicated with the solution inlet and outlet is arranged on the bottom plate (11), a third through hole (7a) communicated with the second through hole (11a) is formed in the threaded joint (7), the top end of the drainage tube (61) is fixed in the third through hole (7a), and the bottom end of the drainage tube (61) extends out of the threaded joint (7) and is connected with the sampling nozzle (62).

4. The solution concentration detecting device according to claim 2, wherein the sampling head (6) comprises a drainage tube (61) and a sampling nozzle (62), the drainage tube (61) is fixed at the bottom end of the transparent sampling tube (2) and is communicated with the solution inlet and outlet, the bottom plate (11) is provided with a second through hole (11a) for the drainage tube (61) to pass through, the sampling nozzle (62) is fixed at the bottom end of the drainage tube (61), the drainage tube (61) is fixed with a threaded joint (7), and the threaded joint (7) is located between the bottom plate (11) and the sampling nozzle (62).

5. The solution concentration detecting apparatus according to claim 3 or 4, wherein the sampling nozzle (62) is a conical nozzle.

6. The solution concentration detecting apparatus according to claim 2, 3 or 4, wherein the piston (51) comprises a piston body (511) and an O-ring (512), an annular groove (511b) is formed on the outer periphery of the piston body (511), and the O-ring (512) is installed in the annular groove (511 b).

7. The solution concentration detection device according to claim 2, 3 or 4, wherein the bottom of the top plate (12) and the top of the bottom plate (11) are provided with positioning blind holes (11b) oppositely, and the upper end and the lower end of the transparent sampling tube (2) are respectively clamped in the two positioning blind holes (11 b); the first through hole (12a) is communicated with the positioning blind hole (11b) in the top plate (12) to form a stepped hole, and the second through hole (11a) is communicated with the positioning blind hole (11b) in the bottom plate (11) to form the stepped hole.

8. The solution concentration detecting device according to claim 7, wherein a sealing ring mounting groove (11c) is formed at the bottom of the positioning blind hole (11b), and the sealing ring mounting groove (11c) is provided with a sealing ring which is in close contact with the transparent sampling tube (2).

9. A solution concentration detecting apparatus according to claim 1, 2 or 3, wherein said strong light emitting means (3) and said light intensity receiving means (4) are oppositely mounted on a side plate (13) of said light shielding case (1); the strong light emitting device (3) comprises a light source (31), and a fourth through hole (131) for the light source (31) to extend into the inner cavity is formed in the side plate (13); the light intensity receiving device (4) comprises a light detector (41) for converting a light intensity signal into an electric signal, a fifth through hole (132) for allowing a solution light to penetrate through is formed in the side plate (13), and the light detector (41) is aligned to the fifth through hole (132).

10. The solution concentration detecting apparatus according to claim 9, wherein the light detector (41) is a photodiode, a phototriode or a photoresistor.

11. The solution concentration detecting device according to claim 2, 3 or 4, wherein the side plate (13) is provided with an observation hole (133) for observing the solution in the transparent sampling tube (2), and the side plate (13) is provided with a light shielding cover capable of opening or closing the observation hole (133).

12. The solution concentration detecting device according to claim 2, 3 or 4, wherein the linear driving device is an air cylinder or an electric push rod, and the piston rod (52) is detachably and fixedly connected with the piston (51).

13. The apparatus according to claim 1, wherein the processor is provided with a display for displaying the obtained concentration of the solution to be measured.

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