CN216260186U - Solution concentration correcting device - Google Patents

Abstract

The utility model provides a solution concentration correction device, which comprises a solution tank, a quantitative water supply device, a quantitative stock solution supply device, a solution concentration online detection device and a controller, wherein the solution tank is connected with the quantitative water supply device; the quantitative water supply device and the quantitative stock solution supply device are both arranged at the top of the solution tank; a liquid outlet pipe communicated with the solution tank is arranged on the solution tank, and the solution concentration online detection device is arranged on the liquid outlet pipe; the solution concentration online detection device comprises a shading shell, a transparent sampling tube, a piston assembly, a sampling head, a strong light emitting device and a light intensity receiving device; the strong light emitting device and the light intensity receiving device are oppositely arranged on two sides of the transparent sampling tube; the controller is connected with the light intensity receiving device to obtain the concentration of the solution to be detected; the controller is connected with the quantitative water supply device and the quantitative stock solution supply device to control the water adding amount or the liquid adding amount. The utility model realizes the online detection and online correction of the solution concentration by the cooperation of all devices, ensures the solution proportioning precision and improves the solution correction efficiency.

Description

Solution concentration correcting device

Technical Field

The utility model belongs to the technical field of release agent preparation, and particularly relates to a solution concentration correction 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, and the high concentration can lead to the accumulation of the surface coating of the product to generate variegated colors, and simultaneously can cause the waste of the release agent, thereby increasing the cost.

The traditional release agent is prepared by adopting a manual proportioning method, namely, the required volumes of stock solution and water are calculated according to the concentration of the release agent required to be prepared, then the stock solution and the water are mixed for preparation, sampling detection is carried out after the preparation is finished to obtain the concentration of the release agent, and fine adjustment is carried out according to the concentration detection result until the required solution concentration is prepared. Because the preparation mode needs sampling detection and measurement for many times, the preparation of the release agent is inconvenient, the whole operation process is complicated, time and labor are wasted, and the concentration of the prepared solution is difficult to ensure.

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 correction apparatus, which can detect the concentration of a configured initial solution on line, add water or a stock solution to the initial solution according to the detected solution concentration value to achieve the purpose of correcting the concentration of the initial solution, achieve on-line detection and real-time correction of the solution concentration, ensure solution proportioning accuracy, improve solution correction efficiency, reduce the risk of solution pollution, and avoid the cost increase due to solution pollution discharge.

In order to achieve the above and other related objects, the present invention provides a solution concentration correction apparatus, including a solution tank, a quantitative water supply device, a quantitative stock solution supply device, a solution concentration on-line detection device and a controller; the quantitative water supply device and the quantitative stock solution supply device are both arranged at the top of the solution tank; a liquid outlet pipe communicated with the solution tank is arranged on the solution tank, and a liquid outlet valve is arranged on the liquid outlet pipe; the solution concentration online detection device is arranged on the liquid outlet pipe and is positioned between the solution tank and the liquid outlet valve; the solution concentration online detection device comprises a shading shell, a transparent sampling tube, a piston assembly, a sampling head, a strong light emitting device and a light intensity receiving device; 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 fixed in the inner cavity of the shading shell; the sampling head is positioned below the transparent sampling tube and is communicated with the transparent sampling tube to form a solution inlet and outlet channel; the bottom end of the sampling head extends out of the bottom plate and then extends into the liquid outlet pipe; the piston assembly comprises a liquid taking piston and a linear driving assembly for driving the liquid taking piston to move in a reciprocating manner, the linear driving assembly comprises a piston rod, and the bottom end of the piston rod is connected with the liquid taking piston; the liquid taking piston is movably arranged in the transparent sampling tube, and the periphery of the liquid taking 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; the strong light emitting device and the light intensity receiving device are oppositely arranged on two sides of the transparent sampling tube; the controller is connected with the light intensity receiving device to obtain the concentration of the solution to be detected in the transparent sampling tube; the controller is connected with the quantitative water supply device and the quantitative stock solution supply device to control the water adding amount or the liquid adding amount. The utility model realizes the online detection and online correction of the solution concentration through the quantitative water supply device, the quantitative stock solution supply device and the online solution concentration detection device, ensures the solution proportioning precision and improves the solution correction efficiency, and meanwhile, because the transparent sampling tube is communicated with the solution tank through the liquid outlet tube to form a closed container, the cleanliness of the solution in the transparent sampling tube is ensured, the solution in the transparent sampling tube can be directly returned to the liquid outlet tube after the detection is finished, and the solution waste caused by repeated sampling is avoided; in addition, the utility model can scrape the transparent sampling tube by reciprocating the liquid taking piston, thereby achieving the purpose of cleaning the transparent sampling tube, improving the cleaning efficiency and simplifying the cleaning steps; the shading shell is arranged, so that interference of external light on the light intensity receiving device is avoided, foreign matters such as external dust and the like are prevented from being attached to the transparent sampling tube to absorb or reflect light, the accuracy of solution concentration detection is guaranteed, and the solution correction efficiency is improved.

Preferably, the sampling head comprises a drainage tube, a sampling nozzle and a threaded joint, and the threaded joint is fixed at the bottom of the bottom plate; be equipped with on the bottom plate with the second through-hole of transparent sampling tube intercommunication, threaded connection go up open have with the third through-hole of second through-hole intercommunication, the top of drainage tube is fixed in the third through-hole, the bottom of drainage tube is connected with the sample mouth after stretching out threaded connection, is convenient for install whole solution concentration on-line measuring device on the drain pipe through threaded connection, realizes the installation of dismantling of solution concentration on-line measuring device, and simultaneously, the drainage tube passes through threaded connection and is connected with the bottom plate, avoids the drainage tube directly to bear whole solution concentration measuring device's weight, improves the life of drainage tube.

Preferably, the sampling head comprises a drainage tube, a sampling nozzle and a threaded joint, the drainage tube is fixed at the bottom end of the transparent sampling tube and is communicated with the interior of the transparent sampling tube, a second through hole for the drainage tube to pass through is formed in the bottom plate, and the sampling nozzle is fixed at the bottom end of the drainage tube; the threaded joint is sleeved and fixed on the drainage tube and is positioned between the bottom plate and the sampling nozzle; the whole solution concentration on-line detection device is convenient to install on the liquid outlet pipe through the threaded connector, and the solution concentration on-line detection device is convenient to disassemble and install.

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 locating blind hole intercommunication on first through-hole and the roof forms the shoulder hole, the locating blind hole intercommunication on second through-hole and the bottom plate forms the shoulder hole to carry on spacingly to transparent sampling tube through the locating blind hole on roof and the bottom plate, 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, 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 which converts light intensity signals into electric signals, a fifth through hole which is used for allowing the light rays of the solution to be detected 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 detection 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 assembly is an air cylinder or an electric push rod, the piston rod is detachably and fixedly connected with the liquid taking piston, and the linear driving assembly is connected with the controller so as 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.

Preferably, the quantitative stock solution supply device comprises a first base, a quantitative cylinder, a quantitative piston and a second base, wherein the quantitative cylinder is provided with a first end and a second end, the first end of the quantitative cylinder is arranged on the first base, and the second end of the quantitative cylinder is arranged on the second base; the first base is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated to form a fluid channel; the fluid channel is communicated with the inside of the quantifying cylinder; a liquid inlet valve is arranged at the liquid inlet, and a liquid outlet valve is arranged at the liquid outlet; the quantitative piston is movably arranged in the quantitative cylinder, and the periphery of the quantitative piston is in close contact with the inner wall of the quantitative cylinder; the second base is provided with a resetting device for driving the quantitative piston to move to the position of the minimum stroke, and the controller is connected with the stock solution inlet valve and the stock solution outlet valve; the method comprises the steps of conveying stock solution into a quantifying cylinder through a liquid inlet, enabling a quantifying piston to move to a maximum stroke position under the pushing of the stock solution, then closing the liquid inlet, opening a liquid outlet, pushing the quantifying piston to recover to a minimum stroke position by utilizing a resetting device, and enabling the volume of the stock solution discharged from the liquid outlet to be fixed (the volume of the discharged stock solution is determined by the inner diameter of the quantifying cylinder and the moving stroke distance of the quantifying piston), so that the quantitative discharge of the stock solution is realized, and the problem of inaccurate quantification caused by the delay of a sensor is effectively avoided; meanwhile, in the quantitative process, the device provided by the utility model always ensures the cleanliness of the stock solution, and avoids waste caused by stock solution pollution.

Preferably, the resetting device comprises an air pipe, the second base is provided with an air hole communicated with the inside of the quantifying cylinder, and the air hole is connected with the air pipe so that air in the quantifying cylinder is discharged from the air hole when the quantifying cylinder enters the liquid; when the quantitative cylinder needs to discharge liquid, the air can be supplied to the quantitative cylinder through the air hole, so that the piston automatically moves to the position of the minimum stroke.

Preferably, the resetting device comprises a push rod, a through hole communicated with the inside of the quantitative cylinder is formed in the second base, and the push rod penetrates through the through hole to enter the quantitative cylinder to be connected with the quantitative piston, so that the piston is manually moved to the position with the minimum stroke through the push rod.

Preferably, the quantitative stock solution supply device comprises a first proximity switch and a second proximity switch, and one end of the push rod, which is far away from the quantitative piston, is provided with a detection end matched with the first proximity switch and the second proximity switch; the first proximity switch is located at the minimum stroke position of the detection end, the second proximity switch is located at the maximum stroke position of the detection end, whether the quantitative piston moves in place or not is detected by the proximity switch, and the problem of inaccurate quantification caused by visual observation of the position of the quantitative piston is avoided.

Preferably, the second base is provided with an adjusting bolt which can extend into the quantifying cylinder to adjust the maximum stroke of the quantifying piston so as to change the volume of the discharged stock solution, thereby meeting the quantifying requirements of different stock solution volumes.

Preferably, the opposite sides of the first base and the second base are provided with positioning blind holes, the first end of the quantifying cylinder is positioned in the positioning blind hole of the first base, and the second end of the quantifying cylinder is positioned in the positioning blind hole of the second base; the first base and the second base are connected through fixing bolts, the quantitative cylinder is limited and fixed through the first base and the second base, and the quantitative cylinder is convenient to disassemble, assemble and replace.

Preferably, the liquid outlet valve is a pneumatic angle seat valve, a reversing electromagnetic valve is arranged on the pneumatic angle seat valve, the air hole is connected with the reversing electromagnetic valve through an air pipe, and the pneumatic angle seat valve is used for simultaneously controlling the liquid outlet to be opened and the quantitative piston to move towards the direction close to the first base so as to realize automatic quantitative discharge of stock solution.

Preferably, the quantitative water supply device comprises a water inlet valve and a flow meter, and the controller is connected with the water inlet valve and the flow meter to realize the control of the water adding amount.

Preferably, solution concentration correcting unit is still including setting up the agitator motor at solution tank top, be equipped with on the agitator motor and stretch into the puddler of solution tank, be equipped with the stirring leaf on the puddler, agitator motor is connected with the controller to stir the solution in the solution tank, avoid newly-added water or stoste and initial solution mixing inequality, influence concentration measurement result.

As described above, the solution concentration correction device of the present invention has the following advantageous effects:

(1) the utility model realizes the online detection and online correction of the solution concentration through the quantitative water supply device, the quantitative stock solution supply device and the solution concentration online detection device, ensures the solution proportioning precision and improves the solution correction efficiency, and meanwhile, because the transparent sampling tube is communicated with the solution tank through the liquid outlet tube to form a closed container, the cleanliness of the solution in the sampling tube is ensured, the solution in the sampling tube can be directly returned to the liquid outlet tube after the detection is finished, and the solution waste caused by repeated sampling is avoided.

(2) The method comprises the following steps that light rays are emitted to a solution to be detected through a strong light emitting device, the solution to be detected can absorb a part of the light rays, only a part of the light rays penetrate through the solution to be detected and are collected by a light intensity receiving device, the light intensity receiving device converts collected light intensity signals into electric signals, and a processor finally calculates the concentration of the solution to be detected according to the relation between the electric signals and the concentration input in advance; the arrangement of the shading shell effectively avoids the interference of external light on the light intensity receiving device, and simultaneously avoids the influence of external dust and other impurities on the transparent sampling tube on the transmission of the light, thereby improving the accuracy of the solution concentration detection;

(3) the liquid taking piston is arranged in the transparent sampling tube, so that the detected solution 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 detected solution is reduced, and the cost for pollution and dumping of the detected solution is avoided; meanwhile, the inner wall of the transparent sampling tube is scraped by utilizing the reciprocating motion of the liquid taking piston, so that the aim of cleaning the inner wall of the transparent sampling tube can be fulfilled, and the cleaning efficiency is improved;

(4) the arrangement of the threaded joint is convenient for detachably mounting the whole solution concentration online detection device on the liquid outlet pipe, so that the solution concentration online detection device is dismounted and replaced, and the replacement cost is reduced;

(5) the quantitative discharge of the stock solution is realized by utilizing the maximum stroke position and the minimum stroke position of the quantitative piston in the quantitative cylinder, the quantitative accuracy is ensured, and the problem of excessive discharge of the stock solution caused by the delay of a sensor is avoided;

(6) an adjusting bolt is screwed according to the required volume of the stock solution to change the maximum stroke position of the quantitative piston, so that quantitative discharge of different volumes of the stock solution is realized, and the quantitative accuracy of the stock solution is ensured;

(7) the stock solution is always in a closed environment in the process of entering and discharging the stock solution from the quantifying cylinder, so that the cleanliness of the stock solution is ensured, and the influence of the pollution of the stock solution on the final solution is avoided;

(8) whether the quantitative piston moves in place is judged by utilizing the proximity switches (including the first proximity switch and the second proximity switch), so that the accuracy of quantitative discharge of the stock solution is further improved;

(9) 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 correction apparatus according to the present invention.

FIG. 2 is a front sectional view of the solution concentration correction apparatus according to the present invention.

FIG. 3 is a perspective view of an online solution concentration detection device.

Fig. 4 is an explosion diagram of the solution concentration on-line detection device.

FIG. 5 is a front sectional view of the solution concentration on-line measuring device.

FIG. 6 is a perspective view of the constant volume stock solution supplying apparatus.

Fig. 7 is a front partial cross-sectional view of fig. 6.

Description of the reference numerals

The device comprises a solution tank 1, a liquid outlet pipe 11, a quantitative water supply device 2, a water inlet valve 21, a flowmeter 22, a quantitative raw liquid supply device 3, a first base 31, a raw liquid channel 311, a quantitative cylinder 32, a quantitative piston 33, a push rod 34, a detection end 341, a first proximity switch 351, a second proximity switch 352, a second base 36, an air hole 362, an adjusting bolt 365, an adjusting nut 3651, a liquid inlet valve 37, a liquid outlet valve 38, a one-way valve 381, a fixing bolt 39, a solution concentration online detection device 4, a shading shell 41, a bottom plate 411, a second through hole 411a, a positioning blind hole 411b, a slot 4111, a top plate 412, a first through hole 412a, a side plate 413, a fourth through hole 4131, a fifth through hole 4132, an observation hole 4133, a transparent sampling pipe 42, a piston assembly 43, a liquid taking piston 431, a piston rod 432, a sampling head 44, a drainage pipe 441, a piston nozzle 442, a threaded joint 443, a third through hole 443a strong light emitting device 45, a light source 451, a light intensity receiving device 46, a light detector 461, a stirring motor 5, a stirring rod 51, a stirring blade 52 and a conveying pump 6.

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 2, the present invention provides a solution concentration correction device, which comprises a solution tank 1, a quantitative water supply device 2, a quantitative stock solution supply device 3, a solution concentration on-line detection device 4 and a controller; the quantitative water supply device 2 and the quantitative stock solution supply device 3 are both arranged at the top of the solution tank 1; a liquid outlet pipe 11 communicated with the solution tank 1 is arranged on the solution tank 1, and a liquid outlet valve and a delivery pump 6 are arranged on the liquid outlet pipe 11; the solution concentration online detection device 4 is arranged on the liquid outlet pipe 11, and the solution concentration online detection device 4 is positioned between the solution tank 1 and the liquid outlet valve; the solution concentration online detection device 4 comprises a shading shell 41, a transparent sampling tube 42, a piston assembly 43, a sampling head 44, a strong light emitting device 45 and a light intensity receiving device 46; the shading shell comprises a bottom plate 411, a top plate 412 and side plates 413, wherein the bottom plate 411, the top plate 412 and the side plates 413 jointly enclose to form an inner cavity; the transparent sampling tube 42 is fixed in the inner cavity of the shading shell 41; the sampling head 44 is positioned below the transparent sampling tube 42, and the sampling head 44 is communicated with the transparent sampling tube 42 to form a solution inlet and outlet channel; the bottom end of the sampling head 44 extends out of the bottom plate 411 and then extends into the liquid outlet pipe 11; the piston assembly 43 comprises a liquid taking piston 431 and a linear driving assembly for driving the liquid taking piston 431 to reciprocate, the linear driving assembly comprises a piston rod 432, and the bottom end of the piston rod 432 is connected with the liquid taking piston 431; the liquid taking piston 431 is movably arranged in the transparent sampling tube 42, and the periphery of the liquid taking piston 431 is abutted against the inner wall of the transparent sampling tube 42; a first through hole 412a for the piston rod 432 to pass through is formed in the top plate 412; the strong light emitting device 45 and the light intensity receiving device 46 are oppositely arranged at two sides of the transparent sampling tube 42; the controller is connected with the light intensity receiving device 46 to obtain the concentration of the solution to be tested in the transparent sampling tube 42; the controller is connected with the quantitative water supply device 2 and the quantitative stock solution supply device 3 to control the water adding amount or the liquid adding amount.

Mixing a first preset volume of water and a second preset volume of stock solution in a solution tank 1 as an initial solution according to requirements, pumping the initial solution into a transparent sampling tube 42 as a detected solution by using a piston rod 432 in a solution concentration online detection device 4, and emitting light to the detected solution in the transparent sampling tube 42 through an intense light emitting device 45, wherein the detected solution can absorb a part of light, so that only part of light is collected by a light intensity receiving device 46 after penetrating through the detected solution, the light intensity receiving device 46 converts the collected light intensity signal into an electric signal, and a controller finally calculates the concentration of the detected solution according to the relation between the electric signal and the concentration input in advance; after the solution concentration detection is finished, the solution to be detected in the transparent sampling tube 42 is pushed back to the solution tank 1, so that the pollution and waste of the solution are avoided; and finally, controlling the water adding volume of the quantitative water supply device 2 or the stock solution adding volume of the quantitative stock solution supply device 3 according to the obtained concentration value of the solution to be detected until the concentration of the solution meets the requirement, and improving the correction efficiency of the concentration of the solution.

It is understood that the transparent sampling tube 42 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 42 is in a regular hexagonal or square or circular etc. centrosymmetric pattern, but this is not a limitation, and the embodiment is preferably configured to be circular.

It can be understood that the liquid-extracting piston 431 includes a piston body and an O-ring, the top of the piston body is provided with a mounting hole for inserting the piston rod 432, the periphery of the piston body is provided with an annular groove, the O-ring is mounted in the annular groove, and the purpose of sealing and cleaning the inner wall of the transparent sampling tube 42 is achieved by the O-ring.

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 is a reciprocating linear motion device that can realize automatic driving, such as an air cylinder, an electric push rod, etc., and this is not limited, and the linear driving assembly is preferably configured as an air cylinder in this embodiment.

As shown in fig. 4, when the linear driving assembly is a cylinder, the cylinder includes a cylinder body and a piston rod 432 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 412a, 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 bottom plate 411 and the top plate 412 are square plates, the side plate 413 includes a front side plate, a rear side plate, a left side plate and a right side plate, and the bottom plate 411, the top plate 412, 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 41 in a shape of a regular quadrangular prism; the bottom plate 411 and the top plate 412 are oppositely provided with slots 4111 for mounting the side plates 413, so that the positioning and mounting of the side plates 413 are facilitated; the bottom plate 411, the side plate 413 and the top plate 412 are connected through bolts, so that the assembly, disassembly and processing are facilitated.

It is understood that the light shielding case 41 may be configured as a cylindrical or other regular prism case with various structures, which is not limited as long as the requirements of light shielding and dust prevention can be satisfied.

As shown in fig. 4 and 5, the bottom of the top plate 412 and the top of the bottom plate 411 are provided with positioning blind holes 411b, and the upper end and the lower end of the transparent sampling tube 42 are respectively clamped in the two positioning blind holes 411b to limit and fix the transparent sampling tube 42; the first through hole 412a communicates with the blind positioning hole 411b of the top plate 412 to form a stepped hole.

It can be understood that the positioning blind hole 411b is provided therein with a sealing ring closely contacting with the transparent sampling tube 42, so as to prevent the external air from affecting the suction force of the transparent sampling tube 42.

As shown in FIG. 5, the sampling head 44 includes a draft tube 441, a sampling nozzle 442 and a screw-thread joint 443, the screw-thread joint 443 being fixed at the bottom of the bottom plate 411; the bottom plate 411 is provided with a second through hole 411a communicated with the transparent sampling tube 42, the threaded joint 443 is provided with a third through hole 443a communicated with the second through hole 411a, the top end of the drainage tube 441 is fixed in the third through hole 443a, and the bottom end of the drainage tube 441 extends out of the threaded joint 443 and then is connected with the sampling nozzle 442, so that the solution concentration online detection device 4 can be conveniently disassembled, assembled and replaced.

In another embodiment, the sampling head comprises a drainage tube 441, a sampling nozzle 442 and a threaded joint 443, the drainage tube 441 is fixed at the bottom end of the transparent sampling tube 42 and is communicated with the inside of the transparent sampling tube 42, the bottom plate 411 is provided with a second through hole 411a for the drainage tube 441 to pass through, and the sampling nozzle 442 is fixed at the bottom end of the drainage tube 441; the screw joint 443 is sleeved and fixed on the drainage tube 441, and the screw joint 443 is located between the bottom plate 411 and the sampling nozzle 442.

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.

It can be understood that, in order to facilitate the installation of the solution concentration online detection device 4 and the delivery pump 6, a tee joint is arranged on the liquid outlet pipe 11, the tee joint comprises a first interface, a second interface and a third interface, the first interface of the tee joint is connected with the liquid outlet pipe 11, and the delivery pump 6 is installed on the second interface of the tee joint; the solution concentration online detection device 4 is arranged on a third interface of the tee joint.

As shown in fig. 4 and 5, the strong light emitting device 45 and the light intensity receiving device 46 are oppositely mounted on the side plate 413 of the light shielding shell 41; the strong light emitting device 45 comprises a light source 451, and a fourth through hole 4131 for the light source 451 to extend into the inner chamber is formed on the side plate 413; the light intensity receiving device 46 includes a light detector 461 for converting a light intensity signal into an electrical signal, a fifth through hole 4132 is disposed on the side plate 413 for allowing the light passing through the solution to be detected to pass through, and the light detector 461 is aligned with the fifth through hole 4132.

It is understood that the strong light emitting device 45 and the light intensity receiving device 46 can be directly installed in the light shielding shell 41, and the specific installation position is not limited as long as it is ensured that all the light emitted by the strong light emitting device 45 passes through the solution to be tested in the transparent sampling tube 42, and the light passing through the solution to be tested can be sensed by the light intensity receiving device 46.

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 461 is a photosensitive element such as a photodiode, a phototriode, or a photoresistor, but not limited thereto, and a photodiode that can convert a light intensity signal into a voltage signal is preferably used in this embodiment.

As shown in fig. 3, the side plate 413 is provided with an observation hole 4133 for observing the solution in the transparent sampling tube 42, and the side plate 413 is provided with a light shielding cover capable of opening or closing the observation hole 4133.

Furthermore, the transparent sampling tube 42 is provided with scale marks, which is convenient for the operator to accurately know the volume of the solution to be measured in the transparent sampling tube 42.

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

As shown in fig. 6 and 7, the quantitative liquid feeding apparatus 3 includes a first base 31, a quantitative cylinder 32, a quantitative piston 33, and a second base 36, wherein the quantitative cylinder 32 has a first end and a second end, the first end of the quantitative cylinder 32 is disposed on the first base 31, and the second end of the quantitative cylinder 32 is disposed on the second base 36; a liquid inlet and a liquid outlet are arranged on the first base 31, and the liquid inlet and the liquid outlet are communicated to form a stock solution channel 311; the stock solution channel 311 is communicated with the inside of the quantifying cylinder 32; a stock solution inlet valve 37 is arranged at the liquid inlet, and a stock solution outlet valve 38 is arranged at the liquid outlet; the quantitative piston 33 is movably arranged in the quantitative cylinder 32, and the periphery of the quantitative piston 33 is tightly contacted with the inner wall of the quantitative cylinder 32; and a resetting device for driving the quantitative piston 33 to move to the minimum stroke position is arranged on the second base 36, and the controller is connected with a stock solution inlet valve 37 and a stock solution outlet valve 38.

When the concentration value obtained by the solution concentration online detection device 4 is smaller than a preset concentration value, firstly calculating the volume of a stock solution to be added according to the obtained concentration value and the volume of an initial solution, and calculating the quantitative discharge frequency of the stock solution to be finished according to the volume of the stock solution to be added and the volume of the stock solution to be discharged by the stock solution quantitative device at a single time; then, the quantitative piston 33 is pushed to make the quantitative piston 33 located at the minimum stroke position, then, the raw liquid outlet valve 38 is closed, the raw liquid inlet valve 37 is opened, so that the raw liquid enters the quantitative cylinder 32 to push the quantitative piston 33 to move in the direction away from the first base 31 until the quantitative piston 33 reaches the maximum stroke position, and the raw liquid inlet valve 37 is closed; then, the raw liquid outlet valve 38 is opened, the quantitative piston 33 is pushed to move towards the direction close to the first base 31 until the quantitative piston 33 reaches the position of the minimum stroke, and the raw liquid outlet valve 38 is closed; repeating the steps until the required quantitative discharge times of the stock solution are finished; the volume of the stock solution discharged by the stock solution quantitative supplying means 3 at a single time can be obtained by calculating the inner diameter of the quantitative cylinder 32 and the distance between the maximum stroke position and the minimum stroke position of the quantitative piston 3.

It can be understood that the quantitative piston 33 includes a piston body having an annular groove formed in the outer periphery thereof and an O-ring seal installed in the annular groove, and the O-ring seal is used to seal and clean the inner wall of the quantitative cylinder 32.

It can be understood that the resetting device has three modes, the first mode is manual resetting, the second mode is automatic resetting, and the third mode is manual and automatic; the following description will be made specifically for the structures corresponding to the manual reset mode and the automatic reset mode:

as shown in fig. 7, when the manual reset mode is adopted, the reset device includes a push rod 34, a through hole communicated with the inside of the dosing cylinder 32 is formed on the second base 36, the push rod 34 passes through the through hole to enter the dosing cylinder 32 to be connected with the dosing piston 33, and the dosing piston 33 is pushed by the push rod 34 to reset (i.e., return to the minimum stroke position); when adopting the automatic re-setting mode, resetting means includes the trachea, be equipped with on the second base 36 with the inside gas pocket 362 of intercommunication of a quantification section of thick bamboo 32, gas pocket 362 is connected with the trachea, realizes the automatic re-setting of ration piston 33 through the air feed to gas pocket 362, and simultaneously, air exhaust's venthole when the feed liquor of a quantification section of thick bamboo 32 is also regarded as to gas pocket 362.

It should be understood that the push rod 34 may be directly pushed by a linear moving device such as an air cylinder or an electric push rod to achieve the automatic reset function, which is not limited in this respect.

When the reset device adopts a manual reset structure or a manual + automatic structure, the push rod 34 serves as a detection rod.

As shown in fig. 7, the quantitative liquid supplying device includes a first proximity switch 351 and a second proximity switch 352, and a detection end 341 cooperating with the first proximity switch 351 and the second proximity switch 352 is provided at one end of the push rod 34 away from the quantitative piston 33; the first proximity switch 351 is positioned at the minimum stroke position of the detection end 341, the second proximity switch 352 is positioned at the maximum stroke position of the detection end 341, and the controller is connected with the first proximity switch 351 and the second proximity switch 352; whether the quantitative piston 33 moves in place or not is judged by utilizing a signal of the proximity switch, so that the quantitative efficiency is improved, and meanwhile, the problem of inaccurate quantification caused by small actual discharge volume of the stock solution due to errors observed by human eyes is avoided.

As shown in fig. 7, the second base 36 is provided with an adjusting bolt 365 capable of extending into the dosing cylinder 32 to adjust the maximum stroke position of the dosing piston 33, so as to satisfy the dosing requirements of different stock solution volumes; in this embodiment, an adjusting nut 3651 is fixed to the outer end surface of the second base 36, an adjusting bolt 365 that can be inserted into the dosing cylinder 32 is screwed onto the adjusting nut 3651, and the maximum stroke position that can be reached by the dosing piston 33 is adjusted by changing the insertion amount of the adjusting bolt 365.

As shown in fig. 7, the opposite sides of the first base 31 and the second base 36 are provided with positioning blind holes, the first end of the quantitative cylinder 32 is located in the positioning blind hole of the first base 31, and the second end of the quantitative cylinder 32 is located in the positioning blind hole of the second base 36; the first base 31 and the second base 36 are connected by a fixing bolt 39, so that the dosing cylinder 33 can be detachably connected.

It can be understood that, in order to ensure the overall sealing performance of the quantitative stock solution supply device 3, a sealing ring which is tightly contacted with the quantitative cylinder 32 is arranged in the positioning blind hole.

As shown in fig. 6, the raw liquid outlet valve 38 is a pneumatic angle seat valve, a reversing solenoid valve is disposed on the pneumatic angle seat valve, the air hole 362 is connected with the reversing solenoid valve through an air pipe, the solenoid valve is connected with a controller, and compressed air is respectively delivered to the air hole 362 and the pneumatic angle seat valve through the reversing solenoid valve, so as to achieve quantitative discharge of the raw liquid.

It can be understood that the stock solution inlet valve 37 is a pneumatic angle seat valve or a stop valve, and the like, which can be connected or disconnected, and the present embodiment is preferably configured as a pneumatic angle seat valve, which not only has the characteristics of sensitive response, accurate action and frequent starting, but also is convenient for connecting with different stock solution supply devices.

As shown in fig. 7, the raw liquid outlet valve 38 is connected to the liquid outlet through a check valve 381 to prevent the liquid from flowing back into the quantitative cylinder 32 through the liquid outlet.

As shown in fig. 1, the quantitative water supply device 2 includes a water inlet valve 21 and a flow meter 22, both the water inlet valve 21 and the flow meter 22 are connected to a controller, so that when the concentration value obtained by the solution concentration online detection device 4 is greater than a preset concentration value, the volume of water to be added is calculated, and the water inlet volume is controlled by the cooperation of the water inlet valve 21 and the flow meter 22, thereby ensuring that the water inlet volume meets the requirements.

It is to be understood that the constant-volume liquid supply means 2 may be constituted by the constant-volume stock solution supply means 3, and is not limited thereto.

As shown in fig. 2, the solution concentration correction device further includes a stirring motor 5 disposed at the top of the solution tank 1, a stirring rod 51 extending into the solution tank 1 is disposed on the stirring motor 5, a stirring blade 52 is disposed on the stirring rod 51, and the stirring motor 5 is connected with the controller, so as to uniformly mix the solution in the solution tank 1 and avoid affecting the solution concentration detection result.

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 (18)

1. A solution concentration correction device is characterized by comprising a solution tank (1), a quantitative water supply device (2), a quantitative stock solution supply device (3), a solution concentration online detection device (4) and a controller; the quantitative water supply device (2) and the quantitative stock solution supply device (3) are both arranged at the top of the solution tank (1); a liquid outlet pipe (11) communicated with the solution tank (1) is arranged on the solution tank (1), and a liquid outlet valve is arranged on the liquid outlet pipe (11); the solution concentration online detection device (4) is arranged on the liquid outlet pipe (11), and the solution concentration online detection device (4) is positioned between the solution tank (1) and the liquid outlet valve; the solution concentration online detection device (4) comprises a shading shell (41), a transparent sampling tube (42), a piston assembly (43), a sampling head (44), a strong light emitting device (45) and a light intensity receiving device (46); the shading shell comprises a bottom plate (411), a top plate (412) and side plates (413), and the bottom plate (411), the top plate (412) and the side plates (413) jointly enclose to form an inner cavity; the transparent sampling tube (42) is fixed in the inner cavity of the shading shell (41); the sampling head (44) is positioned below the transparent sampling tube (42), and the sampling head (44) is communicated with the transparent sampling tube (42) to form a solution inlet and outlet channel; the bottom end of the sampling head (44) extends out of the bottom plate (411) and then extends into the liquid outlet pipe (11); the piston assembly (43) comprises a liquid taking piston (431) and a linear driving assembly for driving the liquid taking piston (431) to reciprocate, the linear driving assembly comprises a piston rod (432), and the bottom end of the piston rod (432) is connected with the liquid taking piston (431); the liquid taking piston (431) is movably arranged in the transparent sampling tube (42), and the periphery of the liquid taking piston (431) is abutted against the inner wall of the transparent sampling tube (42); a first through hole (412a) for a piston rod (432) to pass through is formed in the top plate (412); the strong light emitting device (45) and the light intensity receiving device (46) are oppositely arranged on two sides of the transparent sampling tube (42); the controller is connected with the light intensity receiving device (46) to acquire the concentration of the solution to be detected in the transparent sampling tube (42); the controller is connected with the quantitative water supply device (2) and the quantitative stock solution supply device (3) to control the water adding amount or the liquid adding amount.

2. The solution concentration correction apparatus according to claim 1, wherein the sampling head (44) comprises a draft tube (441), a sampling nozzle (442) and a screw joint (443), the screw joint (443) is fixed at the bottom of the bottom plate (411); the bottom plate (411) is provided with a second through hole (411a) communicated with the transparent sampling tube (42), the screwed joint (443) is provided with a third through hole (443a) communicated with the second through hole (411a), the top end of the drainage tube (441) is fixed in the third through hole (443a), and the bottom end of the drainage tube (441) extends out of the screwed joint (443) and then is connected with the sampling nozzle (442).

3. The solution concentration correction apparatus as claimed in claim 1, wherein the sampling head comprises a drainage tube (441), a sampling nozzle (442) and a screw joint (443), the drainage tube (441) is fixed to the bottom end of the transparent sampling tube (42) and communicates with the inside of the transparent sampling tube (42), the base plate (411) is provided with a second through hole (411a) through which the drainage tube (441) passes, and the sampling nozzle (442) is fixed to the bottom end of the drainage tube (441); the screwed joint (443) is sleeved and fixed on the drainage tube (441), and the screwed joint (443) is positioned between the bottom plate (411) and the sampling nozzle (442).

4. The solution concentration correction device according to claim 2 or 3, wherein the bottom of the top plate (412) and the top of the bottom plate (411) are provided with positioning blind holes (411b) oppositely, and the upper end and the lower end of the transparent sampling tube (42) are respectively clamped in the two positioning blind holes (411 b); the first through hole (412a) is communicated with a positioning blind hole (411b) in the top plate (412) to form a stepped hole, and the second through hole (411a) is communicated with a positioning blind hole (411b) in the bottom plate (411) to form a stepped hole.

5. A solution concentration correction apparatus according to claim 1, 2 or 3, wherein said strong light emitting means (45) and said light intensity receiving means (46) are installed oppositely on a side plate (413) of the light shielding case (41); the strong light emitting device (45) comprises a light source (451), and a fourth through hole (4131) for the light source (451) to extend into the inner cavity is formed in the side plate (413); the light intensity receiving device (46) comprises a light detector (461) for converting a light intensity signal into an electric signal, a fifth through hole (4132) for allowing the light passing through the solution to be detected to pass through is formed in the side plate (413), and the light detector (461) is aligned with the fifth through hole (4132).

6. The solution concentration correction apparatus according to claim 5, wherein the light detector (461) is a photodiode, a phototriode or a photoresistor.

7. The solution concentration correction apparatus according to claim 1, 2 or 3, wherein the side plate (413) is provided with an observation hole (4133) for observing the solution in the transparent sampling tube (42), and the side plate (413) is provided with a light-shielding cover capable of opening or closing the observation hole (4133).

8. The solution concentration correction device according to claim 1, 2 or 3, wherein the linear driving assembly is an air cylinder or an electric push rod, and the piston rod (432) is detachably and fixedly connected with the liquid taking piston (431); the linear driving assembly is connected with the controller.

9. The solution concentration correction device according to claim 1, wherein a display for displaying the obtained measured solution concentration is provided on the controller.

10. The solution concentration correction apparatus according to claim 1, 2 or 3, wherein the quantitative stock solution supply apparatus (3) comprises a first base (31), a quantitative cylinder (32), a quantitative piston (33) and a second base (36), the quantitative cylinder (32) has a first end and a second end, the first end of the quantitative cylinder (32) is disposed on the first base (31), and the second end of the quantitative cylinder (32) is disposed on the second base (36); a liquid inlet and a liquid outlet are arranged on the first base (31), and the liquid inlet and the liquid outlet are communicated to form a stock solution channel (311); the stock solution channel (311) is communicated with the inside of the quantitative cylinder (32); a stock solution inlet valve (37) is arranged at the liquid inlet, and a stock solution outlet valve (38) is arranged at the liquid outlet; the quantitative piston (33) is movably arranged in the quantitative cylinder (32), and the periphery of the quantitative piston (33) is tightly contacted with the inner wall of the quantitative cylinder (32); and a resetting device for driving the quantitative piston (33) to move to the position of the minimum stroke is arranged on the second base (36), and the controller is connected with a stock solution inlet valve (37) and a stock solution outlet valve (38).

11. The solution concentration correction apparatus according to claim 10, wherein the reset means comprises an air tube, the second base (36) is provided with an air hole (362) communicated with the inside of the quantitative cylinder (32), and the air hole (362) is connected with the air tube.

12. The solution concentration correction device as claimed in claim 11, wherein the reset means comprises a push rod (34), the second base (36) is provided with a through hole communicated with the inside of the dosing cylinder (32), and the push rod (34) passes through the through hole to enter the dosing cylinder (32) to be connected with the dosing piston (33).

13. The solution concentration correction device according to claim 12, wherein the quantitative liquid supplying device comprises a first proximity switch (351) and a second proximity switch (352), and one end of the push rod (34) far away from the quantitative piston (33) is provided with a detection end (341) matched with the first proximity switch (351) and the second proximity switch (352); the first proximity switch (351) is located at the minimum stroke position of the detection end (341), the second proximity switch (352) is located at the maximum stroke position of the detection end (341), and the controller is connected with the first proximity switch (351) and the second proximity switch (352).

14. The solution concentration correction apparatus according to claim 10, wherein the second base (36) is provided with an adjusting bolt (365) which can be extended into the quantitative cylinder (32) to adjust the maximum stroke position of the quantitative piston (33).

15. The solution concentration correction device according to claim 10, wherein the first base (31) and the second base (36) are provided with blind positioning holes on opposite sides, the first end of the quantitative cylinder (32) is located in the blind positioning hole of the first base (31), and the second end of the quantitative cylinder (32) is located in the blind positioning hole of the second base (36); the first base (31) and the second base (36) are connected by a fixing bolt (39).

16. The solution concentration correction device as claimed in claim 11, wherein the outlet valve (38) is a pneumatic angle seat valve, a reversing solenoid valve is disposed on the pneumatic angle seat valve, the air hole (362) is connected with the reversing solenoid valve through an air pipe, and the solenoid valve is connected with the controller.

17. The solution concentration correction apparatus according to claim 1, wherein the quantitative water supply means (2) comprises a water inlet valve (21) and a flow meter (22), and the controller is connected to the water inlet valve (21) and the flow meter (22).

18. The solution concentration correction device according to claim 1, further comprising a stirring motor (5) disposed at the top of the solution tank (1), wherein a stirring rod (51) extending into the solution tank (1) is disposed on the stirring motor (5), a stirring blade (52) is disposed on the stirring rod (51), and the stirring motor (5) is connected to the controller.

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