A solution concentration correction device

Abstract

The present invention provides a solution concentration correction device, comprising a solution box, a quantitative water supply device, a quantitative raw liquid supply device, a solution concentration online detection device and a controller; the quantitative water supply device and the quantitative raw liquid supply device are both installed on the top of the solution box; the solution box is provided with a liquid outlet pipe connected to the solution box, and the solution concentration online detection device is installed on the liquid outlet pipe; the solution concentration online detection device comprises a light shielding 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 relatively arranged on both sides of the transparent sampling tube; the controller is connected to the light intensity receiving device to obtain the concentration of the measured solution; the controller is connected to the quantitative water supply device and the quantitative raw liquid supply device to control the amount of water or liquid added. The present invention realizes online detection and online correction of solution concentration through the cooperation of various devices, ensures the accuracy of solution ratio, and improves the efficiency of solution correction.

Description

Technical Field

[0001] The invention belongs to the technical field of release agent configuration, and in particular relates to a solution concentration correction device. Background Art

[0002] With the rapid development of lightweight vehicles and 5G communications, the structures of die-cast products such as body structural parts, new energy parts, and 5G communication parts are becoming more and more complex, and higher requirements are placed on die-casting equipment. In the production process of die-cast products, the demolding quality of die-cast products directly affects the pass rate of die-cast products, and the demolding quality of die-cast products is largely affected by the release agent, especially the concentration of the release agent. A low concentration of the release agent will cause the die-cast product to fail to demold smoothly, and a high concentration will cause the paint on the surface of the product to accumulate and produce discoloration, which will also cause waste of release agent, thereby increasing costs.

[0003] Traditional release agents are prepared by manual proportioning, that is, first calculate the required volumes of stock solution and water according to the concentration of the release agent to be prepared, then mix them for preparation, and then take samples for testing to obtain the concentration of the release agent after the preparation is completed, and make fine adjustments based on the concentration test results until the required solution concentration is prepared. Since this preparation method requires multiple sampling tests and measurements, it brings a lot of inconvenience to the preparation of the release agent. The entire operation process is complicated, time-consuming and labor-intensive, and the concentration of the prepared solution is difficult to guarantee. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the object of the present invention is to provide a solution concentration correction device, which can detect the configured initial solution concentration online, and add water or stock solution to the initial solution according to the detected solution concentration value to achieve the purpose of correcting the initial solution concentration, thereby realizing online detection and real-time correction of solution concentration, ensuring the accuracy of solution ratio, improving solution correction efficiency, reducing the risk of solution contamination, and avoiding increased costs due to solution pollution emissions.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a solution concentration correction device, including a solution tank, a quantitative water supply device, a quantitative raw liquid supply device, a solution concentration online detection device and a controller; the quantitative water supply device and the quantitative raw liquid supply device are both installed on the top of the solution tank; the solution tank is provided with a liquid outlet pipe connected to the solution tank, and the liquid outlet pipe is provided with a liquid outlet valve; the solution concentration online detection device is installed on the liquid outlet pipe, and the solution concentration online detection device is located between the solution tank and the liquid outlet valve; the solution concentration online detection device includes a light-shielding shell, a transparent sampling tube, a piston assembly, a sampling head, a strong light emitting device and a light intensity receiving device; the light-shielding shell includes a bottom plate, a top plate and a side plate, and the bottom plate, the top plate and the side plate together enclose an internal chamber; the transparent sampling tube is fixed in the internal chamber of the light-shielding shell The sampling head is located below the transparent sampling tube, and the sampling head is connected 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 tube; the piston assembly includes a liquid collection piston and a linear drive assembly for driving the liquid collection piston to move back and forth, and the linear drive assembly includes a piston rod, and the bottom end of the piston rod is connected with the liquid collection piston; the liquid collection piston is movably arranged in the transparent sampling tube, and the outer periphery of the liquid collection piston abuts against the inner wall of the transparent sampling tube; a first through hole for the piston rod to pass through is provided on the top plate; the strong light emitting device and the light intensity receiving device are relatively arranged on both 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 measured in the transparent sampling tube; the controller is connected with the quantitative water supply device and the quantitative stock liquid supply device to control the amount of water added or the amount of liquid added. The present invention realizes online detection and online correction of solution concentration through a quantitative water supply device, a quantitative raw liquid supply device, and an online solution concentration detection device, thereby ensuring the solution ratio accuracy and improving the solution correction efficiency. At the same time, since the transparent sampling tube is connected with the solution box through a liquid outlet pipe to form a closed container, the cleanliness of the solution in the transparent sampling tube is ensured, so that the solution in the transparent sampling tube can be directly returned to the liquid outlet pipe after the detection is completed, thereby avoiding the waste of solution caused by repeated sampling; in addition, the present invention 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; and the setting of the light shielding shell not only avoids the interference of external light on the light intensity receiving device, but also prevents external dust and other debris from adhering to the transparent sampling tube to absorb or reflect light, thereby ensuring the accuracy of solution concentration detection and further improving the solution correction efficiency.

[0006] Preferably, the sampling head includes a drainage tube, a sampling nozzle and a threaded joint, and the threaded joint is fixed to the bottom of the base plate; a second through hole connected to the transparent sampling tube is provided on the base plate, and a third through hole connected to the second through hole is opened on the threaded joint, and 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 is connected to the sampling nozzle, so that the entire solution concentration online detection device can be installed on the liquid outlet pipe through the threaded joint, and the disassembly and installation of the solution concentration online detection device can be realized. At the same time, the drainage tube is connected to the base plate through the threaded joint, so as to avoid the drainage tube directly bearing the weight of the entire solution concentration detection device, thereby improving the service life of the drainage tube.

[0007] Preferably, the sampling head includes 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 connected to the inside of the transparent sampling tube. A second through hole for the drainage tube to pass through is provided on the bottom plate. 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 the threaded joint is located between the bottom plate and the sampling nozzle. The entire solution concentration online detection device can be easily installed on the liquid outlet pipe through the threaded joint, so as to realize the disassembly and installation of the solution concentration online detection device.

[0008] Preferably, positioning blind holes are relatively arranged at the bottom of the top plate and the top of the bottom plate, 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 connected with the positioning blind hole on the top plate to form a stepped hole, and the second through hole is connected with the positioning blind hole on the bottom plate to form a stepped hole, so as to limit the transparent sampling tube through the positioning blind holes on the top plate and the bottom plate, so as to prevent the transparent sampling tube from moving with the piston rod when it moves, affecting the extraction or discharge of the solution to be tested, and to facilitate the replacement of the transparent sampling tube.

[0009] Preferably, the strong light emitting device and the light intensity receiving device are relatively installed on the side panel of the light-shielding shell; the strong light emitting device includes a light source, and the side panel is provided with a fourth through hole for the light source to extend into the internal chamber; the light intensity receiving device includes a light detector that converts the light intensity signal into an electrical signal, and the side panel is provided with a fifth through hole for the light passing through the solution to be tested, and the light detector is aligned with the fifth through hole to ensure that the light source, the light detector and the transparent glass tube are all located in the internal chamber of the light-shielding shell, thereby reducing the influence of external light on the detection results.

[0010] Preferably, the light detector is a photodiode, a phototransistor or a photoresistor, so that users can choose according to their needs.

[0011] Preferably, the side plate is provided with an observation hole for observing the solution in the transparent sampling tube, and the side plate is provided with a light shielding cover which can open or close the observation hole, so as to facilitate observation of whether the volume of the solution in the transparent sampling tube meets the requirements.

[0012] Preferably, the linear drive assembly is a cylinder or an electric push rod, the piston rod is detachably fixedly connected to the liquid extraction piston, and the linear drive assembly is connected to a controller to realize automatic extraction and discharge of the solution, thereby reducing the workload of the operator.

[0013] Preferably, the processor is provided with a display for displaying the acquired concentration of the measured solution, so that the operator can adjust the concentration of the solution according to the displayed concentration value to achieve the purpose of accurate proportioning.

[0014] Preferably, the quantitative raw liquid supply device comprises a first base, a quantitative cylinder, a quantitative piston and a second base, the quantitative cylinder having a first end and a second end, and 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; a liquid inlet and a liquid outlet are arranged on the first base, and the liquid inlet and the liquid outlet are connected to form a fluid channel; the fluid channel is connected to the inside of the quantitative 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 outer periphery of the quantitative piston is in close contact with the inner wall of the quantitative cylinder; a reset valve is arranged on the second base to drive the quantitative piston to move to the minimum stroke position The device is characterized in that the controller is connected with the stock liquid inlet valve and the stock liquid outlet valve; the present invention first delivers the stock liquid into the metering cylinder through the liquid inlet, so that the metering piston moves to the maximum stroke position under the push of the stock liquid, and then closes the liquid inlet, opens the liquid outlet, and uses the reset device to push the metering piston to return to the minimum stroke position, so that the volume of the stock liquid discharged from the liquid outlet is fixed (the volume of the discharged stock liquid is determined by the inner diameter of the metering cylinder and the moving stroke distance of the metering piston), thereby realizing the quantitative discharge of the stock liquid and effectively avoiding the quantitative inaccuracy problem caused by sensor delay; at the same time, in the quantitative process, the device of the present invention always ensures the cleanliness of the stock liquid and avoids the waste caused by the contamination of the stock liquid.

[0015] Preferably, the resetting device includes an air pipe, and the second base is provided with an air hole connected to the interior of the measuring cylinder, and the air hole is connected to the air pipe, so that when the measuring cylinder is filled with liquid, the air in the measuring cylinder is discharged from the air hole; when the measuring cylinder needs to be discharged, air can be supplied to the measuring cylinder through the air hole, so that the piston automatically moves to the minimum stroke position.

[0016] Preferably, the resetting device comprises a push rod, and the second base is provided with a through hole connected to the interior of the metering cylinder. The push rod passes through the through hole and enters the metering cylinder to connect with the metering piston, so that the piston can be manually moved to the minimum stroke position by the push rod.

[0017] Preferably, the quantitative raw liquid supply device includes a first proximity switch and a second proximity switch, and the end of the push rod away from the quantitative piston is provided with a detection end that cooperates 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, and the second proximity switch is located at the maximum stroke position of the detection end. The proximity switch is used to detect whether the quantitative piston has moved into place, thereby avoiding the problem of inaccurate quantitative measurement caused by observing the position of the quantitative piston with the naked eye.

[0018] Preferably, the second base is provided with an adjusting bolt which can be inserted into the metering cylinder to adjust the maximum stroke of the metering piston, so as to change the volume of the discharged stock liquid, thereby meeting the quantitative requirements of different stock liquid volumes.

[0019] Preferably, positioning blind holes are provided on opposite sides of the first base and the second base, the first end of the quantitative cylinder is located in the positioning blind hole of the first base, and the second end of the quantitative cylinder is located in the positioning blind hole of the second base; the first base and the second base are connected by fixing bolts, and the quantitative cylinder is limited and fixed by the first base and the second base, so as to facilitate the disassembly, assembly and replacement of the quantitative cylinder.

[0020] Preferably, the liquid outlet valve is a pneumatic angle seat valve, which is provided with a reversing solenoid valve. The air hole is connected to the reversing solenoid valve through an air pipe. The pneumatic angle seat valve is used to simultaneously control the opening of the liquid outlet and the movement of the quantitative piston toward the first base to achieve automatic quantitative discharge of the raw liquid.

[0021] Preferably, the quantitative water supply device comprises a water inlet valve and a flow meter, and the controller is connected to the water inlet valve and the flow meter to achieve control of the amount of water added.

[0022] Preferably, the solution concentration correction device also includes a stirring motor arranged on the top of the solution tank, the stirring motor is provided with a stirring rod extending into the solution tank, the stirring rod is provided with stirring blades, and the stirring motor is connected to the controller to stir the solution in the solution tank to avoid uneven mixing of newly added water or stock solution with the initial solution, thereby affecting the concentration measurement results.

[0023] As described above, a solution concentration correction device of the present invention has the following beneficial effects:

[0024] (1) The present invention realizes online detection and online correction of solution concentration through a quantitative water supply device, a quantitative raw liquid supply device, and a solution concentration online detection device, thereby ensuring the solution ratio accuracy and improving the solution correction efficiency. At the same time, since the transparent sampling tube is connected to the solution tank through the liquid outlet pipe to form a closed container, the cleanliness of the solution in the sampling tube is ensured, so that the solution in the sampling tube can be directly returned to the liquid outlet pipe after the detection is completed, thereby avoiding the waste of solution caused by repeated sampling.

[0025] (2) The strong light emitting device emits light to the solution to be tested, and the solution to be tested absorbs part of the light, so that only part of the light passes through the solution to be tested and is collected by the light intensity receiving device. The light intensity receiving device converts the collected light intensity signal into an electrical signal. The processor finally calculates the concentration of the solution to be tested based on the relationship between the electrical signal and the concentration input in advance. The setting of the light shielding shell effectively avoids the interference of external light on the light intensity receiving device, and also avoids external dust and other debris adhering to the transparent sampling tube to affect the transmission of light, thereby improving the accuracy of solution concentration detection.

[0026] (3) By arranging a liquid extraction piston in the transparent sampling tube, the solution to be tested can be conveniently extracted or discharged on site, thereby realizing continuous testing and avoiding the need for testing personnel to travel back and forth between the laboratory and the site. This improves testing efficiency while reducing the risk of contamination of the solution to be tested and avoiding the increased cost due to the dumping of the contaminated solution to be tested. At the same time, the reciprocating motion of the liquid extraction piston can be used to scrape the inner wall of the transparent sampling tube, thereby achieving the purpose of cleaning the inner wall of the transparent sampling tube and improving cleaning efficiency.

[0027] (4) The setting of the threaded joint facilitates the detachable installation of the entire solution concentration online detection device on the liquid outlet pipe, thereby realizing the disassembly, assembly and replacement of the solution concentration online detection device and reducing the replacement cost;

[0028] (5) The maximum stroke position and minimum stroke position of the quantitative piston in the quantitative cylinder are used to achieve quantitative discharge of the raw liquid, ensure quantitative accuracy, and avoid the problem of excessive discharge of the raw liquid due to sensor delay;

[0029] (6) According to the required volume of raw liquid, the adjusting bolt is screwed to change the maximum stroke position of the quantitative piston, thereby achieving quantitative discharge of different volumes of raw liquid and ensuring the quantitative accuracy of the raw liquid;

[0030] (7) Since the stock solution is always in a closed environment during the process of entering and discharging the quantitative cylinder, the cleanliness of the stock solution is guaranteed to avoid contamination of the stock solution affecting the final solution;

[0031] (8) Using a proximity switch (including a first proximity switch and a second proximity switch) to determine whether the quantitative piston has moved into position, further improving the accuracy of quantitative discharge of the raw liquid;

[0032] (9) The components of the device of the present invention can be detachably connected, which is convenient for mass production and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional diagram of the solution concentration correction device in the present invention.

[0034] Figure 2 It is a front cross-sectional view of the solution concentration correction device in the present invention.

[0035] Figure 3 It is a three-dimensional diagram of the online detection device of solution concentration.

[0036] Figure 4 This is an exploded diagram of the solution concentration online detection device.

[0037] Figure 5 It is a front view cross-sectional view of the online detection device for solution concentration.

[0038] Figure 6 It is a three-dimensional diagram of the device for quantitative supply of raw liquid.

[0039] Figure 7 for Figure 6 The main view of the partial section.

[0040] Description of Reference Numerals

[0041] Solution tank 1, liquid outlet pipe 11, quantitative water supply device 2, water inlet valve 21, flow meter 22, quantitative raw liquid supply device 3, first base 31, raw liquid channel 311, quantitative cylinder 32, quantitative piston 33, push rod 34, detection end 341, first proximity switch 351, second proximity switch 352, second base 36, air hole 362, adjustment bolt 365, adjustment nut 3651, liquid inlet valve 37, liquid outlet valve 38, one-way valve 381, fixing bolt 39, solution concentration online detection device 4, light shielding shell 41, bottom plate 411, second through hole 411 a, positioning blind hole 411b, slot 4111, top plate 412, first through hole 412a, side plate 413, fourth through hole 4131, fifth through hole 4132, observation hole 4133, transparent sampling tube 42, piston assembly 43, liquid sampling piston 431, piston rod 432, sampling head 44, drainage tube 441, piston mouth 442, threaded joint 443, third through hole 443a, strong light emitting device 45, light source 451, light intensity receiving device 46, light detector 461, stirring motor 5, stirring rod 51, stirring blade 52, delivery pump 6. DETAILED DESCRIPTION

[0042] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0043] See also Figures 1 to 7. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0044] like Figure 1 and Figure 2 As shown, the present invention provides a solution concentration correction device, including a solution tank 1, a quantitative water supply device 2, a quantitative raw liquid supply device 3, a solution concentration online detection device 4 and a controller; the quantitative water supply device 2 and the quantitative raw liquid supply device 3 are both installed on the top of the solution tank 1; the solution tank 1 is provided with a liquid outlet pipe 11 connected to the solution tank 1, and the liquid outlet pipe 11 is provided with a liquid outlet valve and a delivery pump 6; the solution concentration online detection device 4 is installed on the liquid outlet pipe 11, and the solution concentration online detection device 4 is located between the solution tank 1 and the liquid outlet valve; the solution concentration online detection device 4 includes a light shielding 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 light shielding shell includes a bottom plate 411, a top plate 412 and a side plate 413, and the bottom plate 411, the top plate 412 and the side plate 413 are enclosed together to form an internal chamber; the transparent sampling tube 42 is fixed in the internal chamber of the light shielding shell 41; the sampling head 44 is provided with ... The head 44 is located below the transparent sampling tube 42, and the sampling head 44 is connected to 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 tube 11; the piston assembly 43 includes a liquid collection piston 431 and a linear drive assembly that drives the liquid collection piston 431 to move back and forth, and the linear drive assembly includes a piston rod 432, and the bottom end of the piston rod 432 is connected to the liquid collection piston 431; the liquid collection piston 431 is movably arranged in the transparent sampling tube 42 , and the outer periphery of the liquid taking piston 431 abuts against the inner wall of the transparent sampling tube 42; the top plate 412 is provided with a first through hole 412a for the piston rod 432 to pass through; the strong light emitting device 45 and the light intensity receiving device 46 are relatively arranged on both sides of the transparent sampling tube 42; the controller is connected to the light intensity receiving device 46 to obtain the concentration of the measured solution in the transparent sampling tube 42; the controller is connected to the quantitative water supply device 2 and the quantitative raw liquid supply device 3 to control the amount of water added or the amount of liquid added.

[0045] First, the first preset volume of water and the second preset volume of stock solution are mixed into the solution tank 1 as the initial solution as required, and then the piston rod 432 in the solution concentration online detection device 4 is used to draw the initial solution into the transparent sampling tube 42 as the solution to be tested, and the strong light emitting device 45 emits light to the solution to be tested in the transparent sampling tube 42. The solution to be tested will absorb part of the light, so that only part of the light is collected by the light intensity receiving device 46 after passing through the solution to be tested. The light intensity receiving device 46 converts the collected light intensity signal into an electrical signal, and the controller finally calculates the concentration of the solution to be tested based on the relationship between the electrical signal and the concentration input in advance; after the solution concentration detection is completed, the solution to be tested in the transparent sampling tube 42 is pushed back to the solution tank 1 to avoid contamination and waste of the solution; finally, according to the obtained concentration value of the solution to be tested, the water volume added by the quantitative water supply device 2 or the stock solution volume added by the quantitative stock solution supply device 3 is controlled until the solution concentration meets the requirements, thereby improving the correction efficiency of the solution concentration.

[0046] It is understandable that the transparent sampling tube 42 is made of transparent materials such as transparent glass, transparent polypropylene, transparent polyethylene, etc., which is not limited to this. In this embodiment, a transparent glass tube is preferably used.

[0047] It can be understood that the cross section of the transparent sampling tube 42 is a centrally symmetrical shape such as a regular hexagon, a square, or a circle, which is not limited to this. In this embodiment, it is preferably set to be a circle.

[0048] It can be understood that the liquid sampling piston 431 includes a piston body and an O-ring. A mounting hole for inserting the piston rod 432 is provided on the top of the piston body. An annular groove is opened on the periphery of the piston body. The O-ring is installed in the annular groove. The O-ring is used to seal and clean the inner wall of the transparent sampling tube 42.

[0049] It can be understood that there are two types of linear drive components. The first type is a separate piston rod that can only be driven manually; the second type is a reciprocating linear moving device such as a cylinder or an electric push rod that can be automatically driven. There is no limitation on this. In this embodiment, the linear drive component is preferably set to a cylinder.

[0050] like Figure 4 As shown, when the linear drive assembly is a cylinder, the cylinder includes a cylinder body and a piston rod 432 that reciprocates in the cylinder body, the cylinder body includes a first cylinder body and a second cylinder body, the outer diameter of the first cylinder body is adapted to the inner diameter of the first through hole 412a, and the outer diameter of the first cylinder body is smaller than the outer diameter of the second cylinder body, so that the entire cylinder body forms a stepped structure, which is convenient for utilizing the stepped structure of the cylinder body to realize the positioning and installation of the cylinder.

[0051] like Figure 4 and Figure 5As shown, the bottom plate 411 and the top plate 412 are both square plates, and the side plate 413 includes a front side plate, a rear side plate, a left side plate and a right side plate. 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 form a light-shielding shell 41 in the shape of a regular quadrangular prism; the bottom plate 411 and the top plate 412 are relatively provided with slots 4111 for installing the side plates 413, which is convenient for positioning and installing the side plates 413; the bottom plate 411, the side plates 413 and the top plate 412 are connected by bolts, which is convenient for disassembly, assembly and processing.

[0052] It is understandable that the light shielding shell 41 can also be configured as a shell of various structures such as a cylinder or other regular prisms, and there is no limitation on this, as long as the light shielding and dust prevention requirements can be met.

[0053] like Figure 4 and Figure 5 As shown, positioning blind holes 411b are relatively arranged at the bottom of the top plate 412 and the top of the bottom plate 411, 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 is connected with the positioning blind hole 411b on the top plate 412 to form a stepped hole.

[0054] It is understandable that a sealing ring is provided in the positioning blind hole 411 b so as to be in close contact with the transparent sampling tube 42 , so as to prevent the outside air from affecting the suction force of the transparent sampling tube 42 .

[0055] like Figure 5 As shown, the sampling head 44 includes a drainage tube 441, a sampling nozzle 442 and a threaded joint 443, and the threaded joint 443 is fixed at the bottom of the base plate 411; the base plate 411 is provided with a second through hole 411a connected to the transparent sampling tube 42, and the threaded joint 443 is provided with a third through hole 443a connected to 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 is connected to the sampling nozzle 442, so as to facilitate the disassembly, assembly and replacement of the solution concentration online detection device 4.

[0056] In another embodiment, the sampling head includes a drainage 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 connected to 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. The sampling nozzle 442 is fixed at the bottom end of the drainage tube 441; the threaded joint 443 is sleeved and fixed on the drainage tube 441, and the threaded joint 443 is located between the bottom plate 411 and the sampling nozzle 442.

[0057] It can be understood that the sampling nozzle 62 is a conical suction nozzle to reduce the resistance of the measured liquid flowing in the sampling nozzle 62, thereby improving the suction force.

[0058] 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 is provided on the liquid outlet pipe 11, and the tee includes a first interface, a second interface and a third interface. The first interface of the tee is connected to the liquid outlet pipe 11, and the delivery pump 6 is installed on the second interface of the tee; the solution concentration online detection device 4 is installed on the third interface of the tee.

[0059] like Figure 4 and Figure 5 As shown, the strong light emitting device 45 and the light intensity receiving device 46 are relatively installed on the side plate 413 of the light shielding shell 41; the strong light emitting device 45 includes a light source 451, and the side plate 413 is provided with a fourth through hole 4131 for the light source 451 to extend into the internal chamber; the light intensity receiving device 46 includes a light detector 461 that converts the light intensity signal into an electrical signal, and the side plate 413 is provided with a fifth through hole 4132 for the light of the measured solution to pass through, and the light detector 461 is aligned with the fifth through hole 4132.

[0060] It is understandable that the strong light emitting device 45 and the light intensity receiving device 46 can also be directly installed in the light shielding shell 41, and the specific installation position is not limited, as long as 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.

[0061] It is understandable that the light source 31 is a light source such as a light emitting diode that can emit parallel light, and this is not limited to this.

[0062] It is understandable that the light detector 461 is a photosensitive element such as a photodiode, a phototransistor, or a photoresistor, which is not limited thereto. In this embodiment, a photosensitive diode that can convert a light intensity signal into a voltage signal is preferably selected.

[0063] like Figure 3 As shown, 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 which can open or close the observation hole 4133 .

[0064] Furthermore, the transparent sampling tube 42 is provided with scale lines, so that the operator can accurately know the volume of the solution to be measured in the transparent sampling tube 42 .

[0065] Furthermore, the controller is provided with a display for displaying the acquired concentration of the measured solution.

[0066] like Figure 6 and Figure 7 As shown, the quantitative raw liquid supply device 3 includes 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, and the first end of the quantitative cylinder 32 is arranged on the first base 31, and the second end of the quantitative cylinder 32 is arranged on the second base 36; the first base 31 is provided with a liquid inlet and a liquid outlet, and the liquid inlet is connected with the liquid outlet to form a raw liquid channel 311; the raw liquid channel 311 is connected with the inside of the quantitative cylinder 32; a raw liquid inlet valve 37 is provided at the liquid inlet, and a raw liquid outlet valve 38 is provided at the liquid outlet; the quantitative piston 33 is movably arranged in the quantitative cylinder 32, and the outer periphery of the quantitative piston 33 is in close contact with the inner wall of the quantitative cylinder 32; a reset device that drives the quantitative piston 33 to move to the minimum stroke position is provided on the second base 36, and the controller is connected with the raw liquid inlet valve 37 and the raw liquid outlet valve 38.

[0067] When the concentration value obtained by the solution concentration online detection device 4 is less than the preset concentration value, the volume of the stock solution to be added is first calculated according to the obtained concentration value and the volume of the initial solution, and the number of stock solution quantitative discharges to be completed is calculated according to the volume of the stock solution to be added and the volume of the stock solution discharged by the quantitative stock solution supply device in a single time; then, the quantitative piston 33 is pushed so that the quantitative piston 33 is located at the minimum stroke position, and then, the stock solution outlet valve 38 is closed, and the stock solution inlet valve 37 is opened to allow the stock solution to enter the quantitative cylinder 32 to push the quantitative piston 33 away from the first base The quantitative piston 33 moves in the direction of 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, and the quantitative piston 33 is pushed to move in the direction close to the first base 31 until the quantitative piston 33 reaches the minimum stroke position, and the raw liquid outlet valve 38 is closed; the above steps are repeated until the required number of quantitative discharges of raw liquid is completed; the volume of raw liquid discharged by the quantitative raw liquid supply device 3 at a time can be calculated by 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.

[0068] It is understandable that the metering piston 33 includes a piston body and an O-ring. An annular groove is formed on the periphery of the piston body. The O-ring is installed in the annular groove. The O-ring is used to seal and clean the inner wall of the metering cylinder 32.

[0069] It can be understood that there are three types of reset devices, the first is manual reset, the second is automatic reset, and the third is manual + automatic; the structures corresponding to the manual reset mode and the automatic reset mode are specifically described below:

[0070] like Figure 7As shown, when the manual reset mode is adopted, the reset device includes a push rod 34, and the second base 36 is provided with a through hole connected to the inside of the quantitative cylinder 32. The push rod 34 passes through the through hole and enters the quantitative cylinder 32 to be connected to the quantitative piston 33. The quantitative piston 33 is pushed to reset (i.e., return to the minimum stroke position) by the push rod 34; when the automatic reset mode is adopted, the reset device includes an air pipe, and the second base 36 is provided with an air hole 362 connected to the inside of the quantitative cylinder 32, and the air hole 362 is connected to the air pipe. The automatic reset of the quantitative piston 33 is achieved by supplying air to the air hole 362. At the same time, the air hole 362 also serves as an air outlet for air to be discharged when the quantitative cylinder 32 is filled with liquid.

[0071] It is understandable that the push rod 34 can also be directly pushed by a linear moving device such as a cylinder or an electric push rod to achieve the automatic reset function, which is not limited to this.

[0072] When the reset device adopts a manual reset structure or a manual+automatic structure, the push rod 34 serves as a detection rod.

[0073] like Figure 7 As shown, the quantitative raw liquid supply device includes a first proximity switch 351 and a second proximity switch 352, and the end of the push rod 34 away from the quantitative piston 33 is provided with a detection end 341 that cooperates 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, and the second proximity switch 352 is located at the maximum stroke position of the detection end 341, and the controller is connected to the first proximity switch 351 and the second proximity switch 352; the signal of the proximity switch is used to judge whether the quantitative piston 33 has moved into place, thereby improving the quantitative efficiency and avoiding the quantitative inaccuracy caused by the small actual discharge volume of the raw liquid due to the observation error of the human eye.

[0074] like Figure 7 As shown, the second base 36 is provided with an adjusting bolt 365 which can be inserted into the metering cylinder 32 to adjust the maximum stroke position of the metering piston 33 to meet the quantitative requirements of different raw liquid volumes; in this embodiment, an adjusting nut 3651 is fixed to the outer end surface of the second base 36, and the adjusting nut 3651 is screwed with an adjusting bolt 365 which can be inserted into the metering cylinder 32. The maximum stroke position that the metering piston 33 can reach is adjusted by changing the insertion amount of the adjusting bolt 365.

[0075] like Figure 7 As shown, positioning blind holes are provided on opposite sides of the first base 31 and the second base 36, 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 fixing bolts 39 to realize the detachable connection of the quantitative cylinder 33.

[0076] It can be understood that, in order to ensure the overall sealing of the quantitative raw liquid supply device 3, a sealing ring in close contact with the quantitative cylinder 32 is provided in the positioning blind hole.

[0077] like Figure 6 As shown, the raw liquid outlet valve 38 is a pneumatic angle seat valve, on which a reversing solenoid valve is provided. The air hole 362 is connected to the reversing solenoid valve through an air pipe, and the solenoid valve is connected to a controller. Compressed air is respectively delivered to the air hole 362 and the pneumatic angle seat valve through the reversing solenoid valve to achieve quantitative discharge of the raw liquid.

[0078] It can be understood that the raw liquid inlet valve 37 is a pneumatic angle seat valve or a stop valve or other valves that can be connected or disconnected. The present embodiment is preferably set to a pneumatic angle seat valve, which not only has the characteristics of sensitive response, accurate action, and frequent startup, but also is easy to connect with different raw liquid supply devices.

[0079] like Figure 7 As shown, the raw liquid outlet valve 38 is connected to the liquid outlet through a one-way valve 381 to prevent the liquid from flowing back into the quantitative cylinder 32 through the liquid outlet.

[0080] like Figure 1 As shown, the quantitative water supply device 2 includes an inlet valve 21 and a flow meter 22, and the inlet valve 21 and the flow meter 22 are both connected to the controller, so that when the concentration value obtained by the online detection device 4 of the solution concentration is greater than the preset concentration value, the volume of water to be added is calculated, and the water inlet amount is controlled by the inlet valve 21 and the flow meter 22 to ensure that the water inlet volume meets the requirements.

[0081] It is understandable that the quantitative water supply device 2 may also adopt the structure of the quantitative raw liquid supply device 3, and this is not limited.

[0082] like Figure 2 As shown, the solution concentration correction device also includes a stirring motor 5 arranged on the top of the solution tank 1, and the stirring motor 5 is provided with a stirring rod 51 extending into the solution tank 1, and the stirring rod 51 is provided with a stirring blade 52. The stirring motor 5 is connected to the controller so as to mix the solution in the solution tank 1 evenly to avoid affecting the solution concentration detection result.

[0083] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A solution concentration correction device, characterized in that: The invention comprises a solution tank (1), a quantitative water supply device (2), a quantitative raw liquid supply device (3), a solution concentration online detection device (4) and a controller; the quantitative water supply device (2) and the quantitative raw liquid supply device (3) are both installed on the top of the solution tank (1); the solution tank (1) is provided with a liquid outlet pipe (11) connected to the solution tank (1), and the liquid outlet pipe (11) is provided with a liquid outlet valve; the solution concentration online detection device (4) is installed on the liquid outlet pipe (11), and the solution concentration online detection device (4) is located between the solution tank (1) and the liquid outlet valve; the solution concentration online detection device (4) comprises a light shielding 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 light shielding shell comprises a bottom plate (411), a top plate (412) and a side plate (413), and the bottom plate (411), the top plate (412) and the side plate (413) together enclose an internal chamber; the transparent sampling tube (42) is fixed in the internal chamber of the light shielding shell (41); the sampling head (44) is located below the transparent sampling tube (42), and the sampling head (44) is connected to 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 tube (11); the piston assembly (43) comprises a liquid collection piston (431) and a linear drive assembly for driving the liquid collection piston (431) to reciprocate, the linear drive assembly comprising a piston rod (432), the bottom end of the piston rod (432) being connected to the liquid collection piston (431); the liquid collection piston (431) is movably arranged in the transparent sampling tube (42), and the outer periphery of the liquid collection piston (431) is in contact with the inner wall of the transparent sampling tube (42); the top plate (412) is provided with a first through hole (431) for the piston rod (432) to pass through. 12a); the strong light emitting device (45) and the light intensity receiving device (46) are arranged on opposite sides of the transparent sampling tube (42); the controller is connected to the light intensity receiving device (46) to obtain the concentration of the solution to be measured in the transparent sampling tube (42); the controller is connected to the quantitative water supply device (2) and the quantitative stock solution supply device (3) to control the amount of water or liquid added; the controller is provided with a display for displaying the obtained concentration of the solution to be measured; the quantitative water supply device (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).

2. A solution concentration correction device according to claim 1, characterized in that: The sampling head (44) comprises a drainage tube (441), a sampling nozzle (442) and a threaded joint (443); the threaded joint (443) is fixed to the bottom of the base plate (411); the base plate (411) is provided with a second through hole (411a) communicating with the transparent sampling tube (42); the threaded joint (443) is provided with a third through hole (443a) communicating with the second through hole (411a); the top end of the drainage tube (441) is fixed in the third through hole (443a); the bottom end of the drainage tube (441) extends out of the threaded joint (443) and is connected to the sampling nozzle (442).

3. A solution concentration correction device according to claim 1, characterized in that: The sampling head comprises a drainage tube (441), a sampling nozzle (442) and a threaded joint (443); the drainage tube (441) is fixed to the bottom end of the transparent sampling tube (42) and is in communication with the interior of the transparent sampling tube (42); a second through hole (411a) for the drainage tube (441) to pass through is provided on the bottom plate (411); the sampling nozzle (442) is fixed to the bottom end of the drainage tube (441); the threaded joint (443) is sleeved and fixed on the drainage tube (441), and the threaded joint (443) is located between the bottom plate (411) and the sampling nozzle (442).

4. A solution concentration correction device according to claim 2 or 3, characterized in that: Positioning blind holes (411b) are arranged opposite to each other at the bottom of the top plate (412) and the top of the bottom plate (411); the upper end and the lower end of the transparent sampling tube (42) are respectively clamped in the two positioning blind holes (411b); the first through hole (412a) is connected to the positioning blind hole (411b) on the top plate (412) to form a stepped hole, and the second through hole (411a) is connected to the positioning blind hole (411b) on the bottom plate (411) to form a stepped hole.

5. A solution concentration correction device according to claim 1, 2 or 3, characterized in that: The strong light emitting device (45) and the light intensity receiving device (46) are mounted on the side plate (413) of the light shielding shell (41) relative to each other; the strong light emitting device (45) comprises a light source (451), and the side plate (413) is provided with a fourth through hole (4131) for the light source (451) to extend into the internal chamber; the light intensity receiving device (46) comprises a light detector (461) for converting a light intensity signal into an electrical signal, and the side plate (413) is provided with a fifth through hole (4132) for light transmitted through the solution to be tested to pass through, and the light detector (461) is aligned with the fifth through hole (4132).

6. A solution concentration correction device according to claim 5, characterized in that: The light detector (461) is a photodiode, a phototransistor, or a photoresistor.

7. A solution concentration correction device according to claim 1, 2 or 3, characterized in that: 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. A solution concentration correction device according to claim 1, 2 or 3, characterized in that: The linear drive assembly is a cylinder or an electric push rod, and the piston rod (432) is detachably fixedly connected to the liquid extraction piston (431); the linear drive assembly is connected to a controller.

9. A solution concentration correction device according to claim 1, 2 or 3, characterized in that: The quantitative raw liquid supply device (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, and the first end of the quantitative cylinder (32) is arranged on the first base (31), and the second end of the quantitative cylinder (32) is arranged on the second base (36); the first base (31) is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are connected to form a raw liquid channel (311); the raw liquid channel (31 ... liquid inlet and the liquid outlet are connected to form a raw liquid channel (311); the liquid inlet and the liquid outlet are connected to form a raw liquid channel (311); the liquid inlet and the liquid outlet are connected to form a raw liquid channel (311); the liquid inlet and the liquid 11) is in communication with the interior of the quantitative cylinder (32); a raw liquid inlet valve (37) is provided at the liquid inlet, and a raw liquid outlet valve (38) is provided at the liquid outlet; the quantitative piston (33) is movably arranged in the quantitative cylinder (32), and the outer periphery of the quantitative piston (33) is in close contact with the inner wall of the quantitative cylinder (32); a reset device for driving the quantitative piston (33) to move to the minimum stroke position is provided on the second base (36), and the controller is connected to the raw liquid inlet valve (37) and the raw liquid outlet valve (38).

10. A solution concentration correction device according to claim 9, characterized in that: The resetting device comprises an air pipe, and the second base (36) is provided with an air hole (362) communicating with the interior of the metering cylinder (32), and the air hole (362) is connected to the air pipe.

11. A solution concentration correction device according to claim 9, characterized in that: The reset device comprises a push rod (34); the second base (36) is provided with a through hole communicating with the interior of the metering cylinder (32); the push rod (34) passes through the through hole and enters the metering cylinder (32) to connect with the metering piston (33).

12. A solution concentration correction device as claimed in claim 10, characterized in that: The reset device comprises a push rod (34); the second base (36) is provided with a through hole communicating with the interior of the metering cylinder (32); the push rod (34) passes through the through hole and enters the metering cylinder (32) to connect with the metering piston (33).

13. A solution concentration correction device according to claim 11 or 12, characterized in that: The quantitative raw liquid supply device comprises a first proximity switch (351) and a second proximity switch (352); an end of the push rod (34) away from the quantitative piston (33) is provided with a detection end (341) that cooperates 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), and the second proximity switch (352) is located at the maximum stroke position of the detection end (341); and the controller is connected to the first proximity switch (351) and the second proximity switch (352).

14. A solution concentration correction device according to claim 9, characterized in that: The second base (36) is provided with an adjusting bolt (365) which can extend into the metering cylinder (32) to adjust the maximum stroke position of the metering piston (33).

15. A solution concentration correction device according to claim 9, characterized in that: Positioning blind holes are provided on opposite sides of the first base (31) and the second base (36); 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 fixing bolts (39).

16. A solution concentration correction device according to claim 10, characterized in that: The liquid outlet valve (38) is a pneumatic angle seat valve, a reversing solenoid valve is provided on the pneumatic angle seat valve, the air hole (362) is connected to the reversing solenoid valve via an air pipe, and the solenoid valve is connected to a controller.

17. A solution concentration correction device according to claim 1, characterized in that: The solution concentration correction device further comprises a stirring motor (5) arranged on the top of the solution tank (1), the stirring motor (5) being provided with a stirring rod (51) extending into the solution tank (1), the stirring rod (51) being provided with a stirring blade (52), and the stirring motor (5) being connected to a controller.

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