Solution concentration detector

Abstract

According to the technical scheme, the solution concentration detector is characterized by comprising a supporting frame, a solution storage container, a temperature sensor and a weighing sensor, the weighing sensor is arranged on the supporting frame, the liquid storage container is arranged on the weighing sensor, the temperature sensor is arranged on the liquid storage container, and a solution inlet and a solution outlet are formed in the liquid storage container; and an emptying valve is arranged at the solution outlet. The device can accurately and quickly calculate the concentration of the liquid caustic soda, is simple to operate, and reduces the use of reagents and PH meters.

Description

TECHNICAL FIELD

[0001] The utility model belongs to concentration detection technical field, especially a solution concentration detector. BACKGROUND

[0002] The solution concentration detector is used for detecting the concentration of a solution, such as detecting the concentration of liquid caustic soda, which is a kind of sodium hydroxide, and is commonly known as liquid sodium hydroxide, and is an important basic chemical raw material with a wide range of applications.

[0003] The solution concentration detector in the prior art usually directly measures the concentration of a solution by using a pH meter or other measuring tools. For example, in the patent document with the publication number CN201852825U and the name of high-concentration caustic soda detection device, a static mixer, a detection sample tube, and a pH meter are disclosed. The static mixer is connected with two input pipes, each of which is provided with a metering pump. The discharge outlet of the static mixer is connected with the lower input port of the detection sample tube by a liquid delivery pipe. The probe of the pH meter is inserted into the top of the detection sample tube. The upper discharge outlet of the detection sample tube is connected with a discharge pipe. However, the method of directly measuring the concentration by using a pH meter in this scheme has a high cost. SUMMARY

[0004] The utility model discloses a solution concentration detector, realize accurate quick calculation to liquid caustic soda concentration, and simple operation reduces reagent and pH meter use, reduce cost.

[0005] The technical scheme for achieving the above-mentioned object comprises the following:

[0006] The solution concentration detector comprises a support frame, a liquid storage container, a temperature sensor, and a weighing sensor. The weighing sensor is arranged on the support frame. The liquid storage container is arranged on the weighing sensor. The temperature sensor is arranged on the liquid storage container. The liquid storage container is provided with a solution inlet and a solution outlet. An emptying valve is arranged at the solution outlet.

[0007] In some embodiments, a liquid level sensor is arranged on the side wall of the liquid storage container. An overflow port is formed in the side wall of the liquid storage container.

[0008] In some embodiments, the solution concentration detector further comprises an overflow pipe, a connecting pipe, a first elbow, and a second elbow. One end of the first elbow is connected with the overflow port. The other end of the first elbow is connected with one end of the overflow pipe. The other end of the overflow pipe is connected with one end of the second elbow. The other end of the second elbow is connected with one end of the connecting pipe. An emptying pipe is arranged at the outlet end of the emptying valve. A connecting port is formed in the side wall of the emptying pipe. The other end of the connecting pipe is connected with the connecting port.

[0009] In some embodiments, the solution concentration detector further comprises a first connecting head and a second connecting head, the emptying pipe is fixed to the outlet end of the emptying valve through the first connecting head, and the inlet end of the emptying valve is fixed to the solution outlet through the second connecting head.

[0010] In some embodiments, the overflow port and the liquid level sensor are at the same horizontal level.

[0011] In some embodiments, the liquid storage container comprises a liquid storage tank, a cover plate and a connecting piece, the top end of the liquid storage tank is open, a flange is arranged at the top end of the liquid storage tank, a first connecting hole is formed in the flange, a second connecting hole is formed in the cover plate, the cover plate is fixed on the flange through the connecting piece partially penetrating the first connecting hole and the second connecting hole, and the solution inlet is arranged on the cover plate.

[0012] In some embodiments, the solution outlet is eccentrically arranged relative to the axis of the liquid storage container to the side away from the load sensor, the inlet end of the emptying valve is connected to the solution outlet, and the actuator of the emptying valve is arranged along the radial direction of the liquid storage container to the side close to the load sensor.

[0013] In some embodiments, the bottom surface of the liquid storage container is arranged to be inclined, the height of the bottom surface of the liquid storage container gradually decreases from the outer edge to the solution outlet, and the opening area of the solution outlet is smaller than the opening area of the outer edge of the bottom surface of the liquid storage container.

[0014] In some embodiments, the solution inlet is arranged to deviate from the support frame, an extension pipe is arranged at the solution inlet, and the extension pipe extends to the outside of the liquid storage tank.

[0015] In some embodiments, the solution concentration detector further comprises a second connecting head, and the inlet end of the emptying valve is fixed to the solution outlet through the second connecting head.

[0016] In some embodiments, the support frame comprises a bottom frame, a first support rod, a second support rod and a connecting rod, the first support rod is arranged on one side of the bottom frame, the second support rod is arranged on the other side of the bottom frame, one end of the connecting rod is arranged on the first support rod, the other end of the connecting rod is arranged on the second support rod, a supporting seat is arranged on the first support rod, a connecting seat is arranged on the liquid storage container, and the load sensor is arranged on the supporting seat and the connecting seat.

[0017] The technical scheme provided by the utility model has the following advantages and effects: the temperature sensor detects the temperature of liquid alkali, the weighing sensor detects the weight of liquid alkali, the volume of liquid alkali in the liquid storage container can be obtained by pouring a quantitative volume of liquid alkali, the density of water at the temperature is obtained by the detected liquid alkali temperature, then the liquid alkali density is calculated according to the liquid alkali weight and the liquid alkali volume, the liquid alkali concentration is calculated according to the density of water as the benchmark, the accurate and rapid calculation of the liquid alkali concentration is realized, compared with the traditional measurement method, the operation is simple, and the use of reagent and PH meter is reduced, thereby reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings show the specific examples of the technical scheme of the utility model, and constitute part of the specification together with the specific embodiments, for explaining the technical scheme, principle and effect of the utility model.

[0019] Unless particularly stated or defined, the same reference signs in different drawings represent the same or similar technical features, and different reference signs can also be used to represent the same or similar technical features.

[0020] Figure 1 It is the overall structure schematic view of the utility model embodiment;

[0021] Figure 2 It is the overall structure schematic view of the utility model embodiment from another angle;

[0022] Figure 3 It is the explosion view of the liquid storage container of the utility model embodiment;

[0023] Figure 4 It is the connection state schematic view of the first connecting head, the emptying valve and the second connecting head of the utility model embodiment.

[0024] Mark explanation:

[0025] 1, support frame; 11, bottom frame; 12, first support rod; 13, second support rod; 14, connecting rod; 15, bearing seat; 151, bearing plate; 152, first reinforcing plate; 2, liquid storage container; 21, liquid storage tank; 211, flange; 212, first connecting hole; 213, solution outlet; 214, overflow port; 22, cover plate; 221, second connecting hole; 222, solution inlet; 223, extension pipe; 23, overflow pipe; 24, connecting pipe; 25, first elbow; 26, second elbow; 27, connecting seat; 271, connecting plate; 272, second reinforcing plate; 3, temperature sensor; 4, weighing sensor; 5, liquid level sensor; 6, emptying valve; 61, valve body; 62, actuator; 7, emptying pipe; 8, first connecting head; 81, first clamping portion; 82, second clamping portion; 83, first screw rod; 84, first threaded block; 85, first handle; 9, second connecting head; 91, third clamping portion; 92, fourth clamping portion; 93, second screw rod; 94, second threaded block; 95, second handle. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present application, the specific embodiments of the present application will be described in more detail below with reference to the accompanying drawings.

[0027] Unless specifically stated or defined otherwise, the terms "first, second,..." used herein are merely used to distinguish the names, and do not represent the specific quantity or order.

[0028] Unless specifically stated or defined otherwise, the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] It should be noted that when an element is considered to be "fixed to" another element, it can be directly fixed to the other element or a middle element can exist; when an element is considered to be "connected to" another element, it can be directly connected to the other element or a middle element can exist; when an element is considered to be "mounted on" another element, it can be directly mounted on the other element or a middle element can exist. When an element is considered to be "provided on" another element, it can be directly provided on the other element or a middle element can exist.

[0030] As Figure 1 and Figure 2The utility model discloses an embodiment provides a kind of solution concentration detector, comprising: support frame 1, liquid storage container 2, temperature sensor 3 and weighing sensor 4;The weighing sensor 4 is arranged on support frame 1, the liquid storage container 2 is arranged on weighing sensor 4, the temperature sensor 3 is arranged on liquid storage container 2, and the liquid storage container 2 is equipped with solution inlet 222 and solution outlet 213;Solution outlet 213 is provided with emptying valve 6.

[0031] In practical application, first control emptying valve 6 to close, after the solution to be measured is filled into liquid storage container 2 by solution inlet 222, the solution to be measured in the embodiment is liquid alkali, and the solution to be measured can be other solution, such as acidic solution, in other embodiments. The temperature of liquid alkali is detected by temperature sensor 3, and the weight of liquid alkali is detected by weighing sensor 4. For the volume of liquid alkali in liquid storage container 2, the volume of liquid alkali can be obtained by filling a quantitative volume of liquid alkali. The density of water at the temperature is obtained by detecting the temperature of liquid alkali. Then, the density of liquid alkali is calculated according to the weight of liquid alkali and the volume of liquid alkali. According to the density of liquid alkali, the concentration of liquid alkali is calculated, the concentration of liquid alkali is accurately and quickly calculated, compared with the traditional measurement method, the operation is simple, and the use of reagent and pH meter is reduced, and the cost is reduced. After completing the concentration measurement of liquid alkali, emptying valve 6 is controlled to open, so that liquid alkali is discharged from solution outlet 213.

[0032] Further, as shown in the drawings, Figure 3 The side wall of the liquid storage container 2 is provided with a liquid level sensor 5, and the side wall of the liquid storage container 2 is provided with an overflow port 214. The overflow port 214 and the liquid level sensor 5 are at the same horizontal height.

[0033] In practical application, the volume of liquid alkali in liquid storage container 2 is detected by liquid level sensor 5. After the liquid alkali in liquid storage container 2 reaches the set liquid level, the filling of liquid alkali is stopped, and the volume of liquid alkali in liquid storage container 2 is controlled. Since the volume of liquid alkali in liquid storage container 2 reaches the set liquid level is detected by the liquid level sensor, the liquid level sensor 5 sends a command to stop pumping, and the filling of liquid alkali is stopped. However, due to the effect of fluid inertia, there is residual liquid alkali in the pipeline, which will continue to flow into the liquid storage container 2. By providing the overflow port 214 at the same horizontal height as the liquid level sensor 5, the excess liquid alkali can be discharged from the overflow port 214, preventing the liquid level of liquid alkali in the liquid storage container 2 from exceeding the set liquid level.

[0034] Further, as shown in the drawings, Figure 2As shown, the solution concentration detector further comprises an overflow pipe 23, a connecting pipe 24, a first elbow 25 and a second elbow 26; one end of the first elbow 25 is connected with the overflow port 214, the other end of the first elbow 25 is connected with one end of the overflow pipe 23, the other end of the overflow pipe 23 is connected with one end of the second elbow 26, the other end of the second elbow 26 is connected with one end of the connecting pipe 24, and the outlet end of the emptying valve 6 is provided with an emptying pipe 7, the sidewall of the emptying pipe 7 is provided with a connecting port, and the other end of the connecting pipe 24 is connected with the connecting port.

[0035] In actual application, the first elbow 25 and the second elbow 26 are both 90° elbows, the overflow port 214, the first elbow 25, the overflow pipe 23, the second elbow 26, the connecting pipe 24 and the emptying pipe 7 are sequentially communicated, the liquid caustic soda flowing out of the overflow port 214 is sequentially discharged through the first elbow 25, the overflow pipe 23, the second elbow 26, the connecting pipe 24 and the emptying pipe 7, the liquid caustic soda flowing out of the overflow port 214 can flow out of the emptying pipe 7 through the overflow pipe 23 and the connecting pipe 24, the liquid caustic soda in the liquid storage container 2 can also flow out of the emptying pipe 7 after the emptying valve 6 is opened through the arrangement of the emptying pipe 7, that is, the liquid caustic soda of the overflow port 214 and the liquid caustic soda after the measurement are all discharged through the emptying pipe 7, which is beneficial to the recovery of the liquid caustic soda.

[0036] Further, as shown in Figs. 1 and 2, Figure 1 and Figure 4 the solution concentration detector further comprises a first connecting head 8, and the emptying pipe 7 is fixed to the outlet end of the emptying valve 6 through the first connecting head 8.

[0037] In practical application, the outlet end of the exhaust valve 6, i.e. the outlet end of the valve body 61 of the exhaust valve 6, can be quickly disassembled and assembled with the exhaust pipe 7 through the first connecting head 8, so as to facilitate replacement of the exhaust valve 6. The first connecting head 8 comprises a first clamping portion 81 and a second clamping portion 82, which are semicircular. One end of the first clamping portion 81 is hingedly connected to one end of the second clamping portion 82, and the other end of the first clamping portion 81 and the other end of the second clamping portion 82 are both provided with a first base plate. When the first clamping portion 81 and the second clamping portion 82 embrace the outlet end of the exhaust pipe 7 and the exhaust valve 6, the two first base plates are parallel to each other. One of the two first base plates is hingedly connected to a first screw rod 83, and the other first base plate is provided with a first accommodating groove for the first screw rod 83. A first threaded block 84 is threadedly connected to the first screw rod 83, and the first threaded block 84 is provided with a first handle 85. After the first clamping portion 81 and the second clamping portion 82 embrace the outlet end of the exhaust pipe 7 and the exhaust valve 6, the first screw rod 83 is turned to enter the first accommodating groove, and the first handle 85 is turned to drive the first threaded block 84 to rotate, so that the first threaded block 84 is rotated to abut against the outside of the other first base plate, thereby locking the first connecting head 8. When unlocking, the first handle 85 is turned in the opposite direction to drive the first threaded block 84 to rotate in the opposite direction, until the first threaded block 84 can be rotated out of the first accommodating groove, thereby unlocking the first connecting head 8. Through the first handle 85, the first threaded block 84 can be driven to move to lock the first connecting head 8. Through the first screw rod 83 and the second threaded block 94, the first connecting head 8 can be quickly locked and unlocked.

[0038] Further, as shown in Figure 3 the liquid storage container 2 comprises a liquid storage tank 21, a cover plate 22 and a connecting piece. The top end of the liquid storage tank 21 is open, and the top end of the liquid storage tank 21 is provided with a flange 211. The flange 211 is provided with a first connecting hole 212. The cover plate 22 is provided with a second connecting hole 221. The connecting piece partially passes through the first connecting hole 212 and the second connecting hole 221, and then the cover plate 22 is fixed on the flange 211. The solution inlet 222 is arranged on the cover plate 22.

[0039] In practical application, the liquid level sensor 5 and the temperature sensor 3 are arranged on the side wall of the liquid storage tank 21, and the liquid level sensor 5 and the temperature sensor 3 are respectively arranged on the side wall of the liquid storage tank through two DN15 inner teeth, the height of the temperature sensor 3 is lower than the height of the liquid level sensor 5, and the overflow port 214 is arranged on the side wall of the liquid storage tank 21. A plurality of first connecting holes 212 are arranged on the flange 211 and uniformly distributed along the ring direction, a plurality of second connecting holes 221 are arranged on the cover plate 22, the number of the second connecting holes 221 is the same as that of the first connecting holes 212, and the plurality of second connecting holes 221 are uniformly distributed along the ring direction. The connecting piece includes a bolt and a nut, the rod part of the bolt is connected with the nut after penetrating through the second connecting hole 221 and the first connecting hole 212, and the cover plate 22 is fixed on the liquid storage tank 21. Through the arrangement of the cover plate 22, foreign matters can be prevented from falling into the liquid storage tank 21, and through the detachable arrangement of the cover plate 22, the inside of the liquid storage tank 21 can be conveniently cleaned.

[0040] Further, as shown in Figure 1 the solution outlet 213 is arranged eccentrically relative to the axis of the liquid storage container 2 to the side away from the weighing sensor 4, the inlet end of the emptying valve 6 is connected with the solution outlet 213, and the actuator 62 of the emptying valve 6 is arranged along the radial direction of the liquid storage container 2 to the side close to the weighing sensor 4.

[0041] In practical application, the inlet end of the emptying valve 6, i.e. the inlet end of the valve body 61 of the emptying valve 6, is arranged eccentrically relative to the axis of the liquid storage container 1 to the side away from the weighing sensor 4, and the actuator 62 of the emptying valve 6 is arranged along the radial direction of the liquid storage container 2 to the side close to the weighing sensor 4, so that the center of gravity of the overall structure formed by the liquid storage container 2, the emptying valve 6 and the emptying pipe 7 is located at the center, the weighing of the weighing sensor 4 is prevented from being inaccurate when the center of gravity of the object deviates from the center, and the valve body 61 and the actuator 62 of the emptying valve 6 are prevented from being excessively deviated to one side, thereby improving the overall stability.

[0042] Further, the bottom surface of the liquid storage container 2 is arranged to be inclined, the height of the bottom surface of the liquid storage container 2 gradually decreases from the outer edge to the solution outlet 213, and the opening area of the solution outlet 213 is smaller than that of the outer edge of the bottom surface of the liquid storage container 2. Specifically, the height of the bottom surface of the liquid storage container gradually decreases from the outer edge to the solution outlet 213, and the opening of the solution outlet 213 is smaller than that of the outer edge of the bottom surface of the liquid storage container 2. In the case of emptying liquid caustic soda, the liquid caustic soda in the liquid storage tank 21 is conveniently gathered and discharged to the solution outlet 213.

[0043] Further, as shown in Figure 2As shown, the solution inlet 222 is arranged away from the support frame, i.e., the overlapping area of the planar orthographic projection of the solution inlet 222 and the support frame 1 is zero, preventing the support frame 1 from blocking the solution inlet 222, and facilitating the pouring of liquid alkali into the solution inlet 222. Specifically, the solution inlet 222 is arranged away from the liquid level sensor 5, preventing the liquid level sensor 5 from making a false judgment during the pouring of liquid alkali.

[0044] Further, as shown in Figure 2 the solution inlet 222 is provided with an extension pipe 223 extending to the outside of the liquid storage tank 21. In actual application, the extension pipe 223 prevents liquid alkali from splashing out when pouring liquid alkali into the liquid storage tank 21.

[0045] Further, as shown in Figure 4 the solution concentration detector further comprises a second connecting head 9, and the inlet end of the emptying valve 6 is fixed at the solution outlet 213 through the second connecting head 9.

[0046] In actual application, the second connecting head 9 enables the quick disassembly and assembly of the solution outlet 213 and the emptying valve 6. The second connecting head 9 comprises a third clamping portion 91 and a fourth clamping portion 92, which are semicircular, and one end of the third clamping portion 91 and one end of the fourth clamping portion 92 are hinged, and the other end of the third clamping portion 91 and the other end of the fourth clamping portion 92 are both provided with a second base plate. When the third clamping portion 91 and the fourth clamping portion 92 embrace the solution outlet 213 and the outlet end of the emptying valve 6, the two second base plates are parallel to each other. One of the two second base plates is hinged with a second screw rod 93, and the other second base plate is provided with a second accommodating groove for the second screw rod 93, and a second threaded block 94 is threadedly connected to the second screw rod 93, and the second threaded block 94 is provided with a second handle 95. After the third clamping portion 91 and the fourth clamping portion 92 embrace the solution outlet 213 and the outlet end of the emptying valve 6, the second screw rod 93 is turned to enter the second accommodating groove, and the second handle 95 is turned to drive the second threaded block 94 to rotate, so that the second threaded block 94 is rotated to abut against the outside of the other second base plate, realizing the locking of the second connecting head 9. To unlock, the second handle 95 is turned in the opposite direction to drive the second threaded block 94 to rotate in the opposite direction, until the second threaded block 94 can be rotated out of the second accommodating groove, realizing the unlocking of the second connecting head 9. The second handle 95 facilitates the movement of the second threaded block 94 to lock the second connecting head 9, and the second screw rod 93 and the second threaded block 94 realize the quick locking and unlocking of the second connecting head 9. Since liquid alkali is strongly corrosive, the emptying valve 6 is prone to damage and is a consumable part. The first connecting head 8 and the second connecting head 9 enable the quick disassembly and assembly of the emptying valve 6, facilitating the replacement of the emptying valve 6.

[0047] Further, as shown in the drawings, Figure 2 The support frame 1 comprises a bottom frame 11, a first support rod 12, a second support rod 13 and a connecting rod 14; the first support rod 12 is arranged on one side of the bottom frame 11, the second support rod 13 is arranged on the other side of the bottom frame 11, one end of the connecting rod 14 is arranged on the first support rod 12, the other end of the connecting rod 14 is arranged on the second support rod 13, a supporting seat 15 is arranged on the first support rod 12, a connecting seat 27 is arranged on the liquid storage container 2, and the weighing sensor 4 is arranged on the supporting seat 15 and the connecting seat 27.

[0048] In actual application, the bottom frame 11 is a square frame, the first support rod 12 and the second support rod 13 are symmetrically arranged, the solution inlet 222 is arranged away from the support frame 1, that is, the solution inlet 222 is arranged away from the connecting rod 14, and the overlapping area of the top view orthographic projection of the solution inlet 222 and the connecting rod 14 is zero. The supporting seat 15 comprises a supporting plate 151, first reinforcing plates 152 are arranged on both sides of the supporting plate 151 arranged on the first support rod 12, the first reinforcing plates 152 are also fixedly connected with the first support rod 12, and the connection stability between the supporting plate 151 and the first support rod 12 is improved through the arrangement of the first reinforcing plates 152. The connecting seat 27 is arranged on the liquid storage tank 21, and the connecting seat 27 comprises a connecting plate 271 arranged on the liquid storage tank 21, and second reinforcing plates 272 arranged on the connecting plate 271, the second reinforcing plates 272 are also fixedly connected with the liquid storage tank 21, and the connection stability between the connecting plate 271 and the liquid storage tank 21 is improved through the arrangement of the second reinforcing plates 272.

[0049] When referring to the drawings, new features appearing are described; in order to avoid repeated reference to the drawings leading to less concise description, features already described are not repeatedly referred to the drawings.

[0050] The purpose of the above examples is to exemplarily reproduce and deduce the technical scheme of the utility model, and to completely describe the technical scheme, purpose and effect of the utility model, so that the public can understand the disclosure of the utility model more thoroughly and comprehensively, and the protection scope of the utility model is not limited.

[0051] The above examples are not exhaustive enumeration based on the utility model, and there can be many other unlisted implementation manners. Any replacement and improvement made without violating the concept of the utility model belongs to the protection scope of the utility model.

Claims

1. A solution concentration detector characterized by, The solution concentration detector comprises a support frame, a liquid storage container, a temperature sensor and a weighing sensor; the weighing sensor is arranged on the support frame, the liquid storage container is arranged on the weighing sensor, the temperature sensor is arranged on the liquid storage container, the liquid storage container is provided with a solution inlet and a solution outlet; and an emptying valve is arranged at the solution outlet. A liquid level sensor is arranged on the side wall of the liquid storage container, and an overflow port is formed in the side wall of the liquid storage container.

2. The solution concentration detector as claimed in claim 1, wherein The solution concentration detector further comprises an overflow pipe, a connecting pipe, a first elbow and a second elbow; one end of the first elbow is connected with the overflow port, the other end of the first elbow is connected with one end of the overflow pipe, the other end of the overflow pipe is connected with one end of the second elbow, the other end of the second elbow is connected with one end of the connecting pipe, the outlet end of the emptying valve is provided with an emptying pipe, a connecting port is formed in the side wall of the emptying pipe, and the other end of the connecting pipe is connected with the connecting port.

3. The solution concentration detector as claimed in claim 2, wherein The solution concentration detector further comprises a first connecting head and a second connecting head; the emptying pipe is fixed to the outlet end of the emptying valve through the first connecting head, and the inlet end of the emptying valve is fixed to the solution outlet through the second connecting head.

4. The solution concentration detector as claimed in claim 3, wherein The overflow port and the liquid level sensor are at the same horizontal height.

5. The solution concentration detector as claimed in claim 2, wherein The liquid storage container comprises a liquid storage tank, a cover plate and a connecting piece; the top end of the liquid storage tank is open, a flange is arranged at the top end of the liquid storage tank, a first connecting hole is formed in the flange, a second connecting hole is formed in the cover plate, the cover plate is fixed to the flange through the connecting piece partially penetrating through the first connecting hole and the second connecting hole, and the solution inlet is arranged on the cover plate.

6. The solution concentration detector according to any one of claims 1 to 5, wherein The solution outlet is eccentrically arranged relative to the axis of the liquid storage container and away from the weighing sensor, the inlet end of the emptying valve is connected with the solution outlet, and an actuator of the emptying valve is arranged along the radial direction of the liquid storage container and close to the weighing sensor.

7. The solution concentration detector according to any one of claims 1 to 5, wherein The bottom surface of the liquid storage container is arranged to be inclined, the height of the bottom surface of the liquid storage container gradually decreases from the outer edge to the solution outlet, and the opening area of the solution outlet is smaller than that of the outer edge of the bottom surface of the liquid storage container.

8. The solution concentration detector as claimed in claim 7, wherein The solution inlet is arranged away from the support frame, an extension pipe is arranged at the solution inlet, and the extension pipe extends to the outside of the liquid storage tank.

9. The solution concentration detector according to any one of claims 1 to 5, wherein The support frame comprises a bottom frame, a first support rod, a second support rod and a connecting rod; the first support rod is arranged on one side of the bottom frame, the second support rod is arranged on the other side of the bottom frame, one end of the connecting rod is arranged on the first support rod, the other end of the connecting rod is arranged on the second support rod, a supporting seat is arranged on the first support rod, a connecting seat is arranged on the liquid storage container, and the weighing sensor is arranged on the supporting seat and the connecting seat.

10. The solution concentration detector according to any one of claims 1 to 5, wherein ​

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