Ultrasonic brine concentration on-line detection flow cell

Abstract

The utility model discloses an ultrasonic brine concentration online detection flow cell, which belongs to the technical field of chemical production and comprises a flow component, a detection component and an auxiliary component, a detection end of the detection component is mounted on the flow component, and the auxiliary component is mounted on the flow component. The device is characterized in that the circulation assembly comprises a circulation cylinder, a liquid inlet pipe, a liquid discharge pipe, a control valve and sealing assemblies, the sealing assemblies are detachably installed at the two ends of the circulation cylinder, and the two ends of the circulation cylinder are sealed through the sealing assemblies. The exhaust part capable of extruding regenerated gas to the exhaust port according to the pressure of the medium inlet is arranged at the top end of the circulation barrel, so that gas in the circulation barrel can be effectively exhausted, meanwhile, the detection assembly is installed on the side wall of the circulation barrel, and the liquid inlet pipe and the liquid outlet pipe are arranged in an up-down staggered mode; the detection accuracy and stability can be effectively prevented from being affected by factors such as impurities and airflow during detection.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chemical production, and specifically relates to an ultrasonic brine concentration on-line detection flow tank. BACKGROUND

[0002] In chemical production, on-line detection application technology is very widely used, and most of the salt concentration detectors currently used are integrated and cannot be disassembled, have small volume, no exhaust hole and no emptying system, and the overall structure of the flow tank is left-in right-out straight-through type. During use, since the detection electrode of the flow tank is installed on the top of the flow tank, a large number of bubbles or air always exist in the upper half of the inner cavity of the flow tank, which affects the accuracy and stability of detection. Due to the corrosiveness and adhesion of the solution, scaling and blockage frequently occur in the inner wall of the flow tank, which needs to be disassembled and cleaned. During the frequent (once a day) disassembly and cleaning process, the flow tank needs to be disassembled as a whole, and all flanges need to be disassembled to empty the solution in the flow tank. Since the temperature of the emptied material is high, there is a risk of scalding. Therefore, the utility model provides an ultrasonic brine concentration on-line detection flow tank to solve the above problems. SUMMARY

[0003] The utility model aims at providing an ultrasonic brine concentration on-line detection flow tank to solve the problems in the above background.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] An ultrasonic brine concentration on-line detection flow tank, comprising a flow assembly, a detection assembly and an auxiliary assembly, the detection end of the detection assembly is installed on the flow assembly, and the auxiliary assembly is installed on the flow assembly. Characterized in that: the flow assembly comprises a flow cylinder, a liquid inlet pipe, a liquid outlet pipe, a control valve and a sealing assembly, the sealing assembly is detachably installed at both ends of the flow cylinder, the two ends of the flow cylinder are blocked by the sealing assembly, one end of the liquid inlet pipe is installed at the bottom end of the sealing assembly on one side of the flow cylinder, one end of the liquid outlet pipe is installed at the top end of the sealing assembly on the other side of the flow cylinder, the control valve is installed at the end of the liquid inlet pipe and the liquid outlet pipe close to the flow cylinder, the auxiliary assembly comprises an exhaust member and an emptying pipe, the exhaust member is installed at the top end of the flow cylinder, the exhaust member uses a quick plug-in flange female buckle interface, and the installation mode of the exhaust member is a straight plug-in female buckle type, the emptying pipe is installed at the bottom end of the flow cylinder, and a control valve is also installed at the end of the emptying pipe close to the flow cylinder.

[0006] As a further scheme of the utility model, the sealing assembly comprises a flange plate and a bolt member, the bolt member is arranged at intervals around the flange plate, the flange plate is divided into two groups, one group of flange plates is installed on the side wall of the flow cylinder, and the two groups of flange plates are connected and separated by the bolt member arranged around.

[0007] As a further scheme of the utility model, the closed assembly comprises a main sealing disc, a buckle ring, a secondary sealing disc, a clamping piece, an adjusting piece, a sealing piece and a fixing piece, the secondary sealing disc is fixedly installed on the outer wall of one end of the flow cylinder, the main sealing disc is arranged at the position of the secondary sealing disc away from the flow cylinder, the buckle ring is sleeved on the outside of the main sealing disc, the adjusting piece is rotatably installed between the main sealing disc and the buckle ring, the clamping piece is installed on the buckle ring and the secondary sealing disc, the sealing piece is installed between the main sealing disc and the secondary sealing disc, and the fixing piece is installed on the buckle ring at the position corresponding to the secondary sealing disc.

[0008] As a further scheme of the utility model, the clamping piece comprises a buckle block and a through slot, the buckle block is annularly and intervally fixedly installed on the inner wall of the side of the buckle ring close to the flow cylinder, and the through slot is annularly and intervally arranged on the side wall of the secondary sealing disc, and the size of the through slot is matched with the size of the buckle block.

[0009] As a further scheme of the utility model, the sealing piece comprises a sealing ring and a sealing ring, the sealing piece and the through slot of the secondary sealing disc are arranged in a staggered manner, the sealing ring is fixedly installed on the side wall of the side of the main sealing disc and the secondary sealing disc close to each other, and the sealing ring is fixedly installed on the two sides of the sealing ring on the main sealing disc and the secondary sealing disc.

[0010] As a further scheme of the utility model, the sealing ring on the main sealing disc and the sealing ring on the secondary sealing disc are both protruded towards the side close to each other, the sealing ring is an annular plate with a trapezoidal cross section, and the sealing ring is inclined towards the side close to the sealing ring.

[0011] As a further scheme of the utility model, the fixing piece comprises a lock screw and a lock screw groove, the lock screw groove is arranged on the top end of the secondary sealing disc and the side wall of the buckle ring, and the lock screw groove on the secondary sealing disc corresponds to the lock screw groove on the buckle ring when the closed assembly is locked.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1、When the utility model is used, the exhaust piece arranged at the top end of the flow cylinder can extrude the regenerated gas to the exhaust port according to the medium inlet pressure, so that the gas in the flow cylinder can be effectively exhausted, and meanwhile, the detection assembly is installed on the side wall of the flow cylinder, and the inlet pipe and the outlet pipe are arranged in a staggered manner, so that the detection accuracy and stability can be effectively avoided from being affected by impurities, airflow and other factors during detection.

[0014] 2、When the utility model is used, the net discharge pipe arranged at the bottom of the flow cylinder can effectively discharge the solution in the flow cylinder before disassembly, and then the flow cylinder can be disassembled, so that the scalding during disassembly can be effectively avoided.

[0015] 3、The utility model discloses when using, through setting up detachable closed assembly, can effectively to the both ends of flow -through cylinder dismount, thereby can conveniently clean the inside of flow -through cylinder.

[0016] 4、The utility model discloses when using, through the screwing of the lock catch screw on buckle ring, make the bottom end of lock catch screw through the screwing of lock catch screw groove on secondary seal disc, and rotate buckle ring, make buckle ring drive buckle block remove to the corresponding position of secondary seal disc through groove and remove, thereby make buckle ring can drive main seal disc complete and the separation of secondary seal disc, thereby can effectively fast complete closed assembly dismounting operation, greatly reduced the dismounting complicated situation to occur. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a kind of ultrasonic wave brine concentration on-line detection flow-through cell's overall structure schematic diagram.

[0018] Figure 2 It is a kind of ultrasonic wave brine concentration on-line detection flow-through cell embodiment three's overall structure schematic diagram.

[0019] Figure 3 It is a kind of ultrasonic wave brine concentration on-line detection flow-through cell embodiment three's closed assembly's partial section structure schematic diagram.

[0020] Figure 4 It is a kind of ultrasonic wave brine concentration on-line detection flow-through cell embodiment three's closed assembly's partial section structure schematic diagram. Figure 3 Local amplification structure schematic diagram of place A in it.

[0021] Figure 5 It is a kind of ultrasonic wave brine concentration on-line detection flow-through cell embodiment three's secondary seal disc's partial structure schematic diagram.

[0022] In the drawing: 1, flow-through cylinder;2, inlet pipe;3, liquid discharge pipe;4, exhaust;5, drain pipe;6, control valve;7, electrode detection piece;8, on-site display;9, data transmission line;10, flange;11, bolt;12, main seal disc;13, buckle ring;14, secondary seal disc;15, lock catch screw;16, lock catch screw groove;17, adjusting ring;18, adjusting groove;19, buckle block;20, sealing ring;21, sealing ring;22, through groove. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0024] Embodiment one:

[0025] Please refer to Figure 1 The utility model discloses an ultrasonic brine concentration on -line detection flow -through cell, including flow -through subassembly, detection subassembly and auxiliary assembly, and the detection subassembly detects the side of flow -through subassembly and installs, and auxiliary assembly installs on flow -through subassembly, and the inside transmission of flow -through subassembly has detection medium, and the detection medium in flow -through subassembly is the saturated concentration brine.

[0026] Flow -through subassembly includes flow -through cylinder 1, liquid inlet pipe 2, liquid outlet pipe 3, control valve 6 and closed subassembly, and flow -through cylinder 1 is cylindrical, and flow -through cylinder 1 is installed horizontally on the support, and the inner wall of flow -through cylinder 1 is designed smooth, and it is convenient to wash, and effectively reduces medium residue, and the material of flow -through cylinder 1 includes but is not limited to corrosion -resistant stainless steel to prolong the service life of equipment, and closed subassembly is detachably installed at both ends of flow -through cylinder 1, and the both ends of flow -through cylinder 1 are blocked through closed subassembly, one end of liquid inlet pipe 2 is installed on the bottom end position of one side closed subassembly of flow -through cylinder 1, and the inside of liquid inlet pipe 2 and flow -through cylinder 1 is interconnected, and the other end of liquid inlet pipe 2 and the main pipe of detection medium are connected, and one end of liquid outlet pipe 3 is installed on the top end position of the closed subassembly of flow -through cylinder 1 on the other side, and the inside of liquid outlet pipe 3 and flow -through cylinder 1 is interconnected, and the other end of liquid outlet pipe 3 is connected with material recovery pool, and detection medium transmission is carried out to the inside of flow -through cylinder 1 through liquid inlet pipe 2, and then transmission is carried out to the liquid outlet through liquid outlet pipe 3, further, after transmission is carried out to the inside of flow -through cylinder 1 through the liquid inlet pipe 2 set up at the bottom, the inside of flow -through cylinder 1 will gradually be filled, until detection medium reaches the position of liquid outlet pipe 3 and is discharged through liquid outlet pipe 3, and through overflow type discharge, the top floating object or foam of detection medium can be effectively discharged, and the interference to detection data during detection is reduced.

[0027] Control valve 6 is installed at the position close to one end of liquid inlet pipe 2 and liquid outlet pipe 3 of flow -through cylinder 1 respectively, and the transmission efficiency of liquid inlet pipe 2 to the inside of flow -through cylinder 1 and the discharge efficiency of liquid outlet pipe 3 to the inside of flow -through cylinder 1 can be controlled through control valve 6.

[0028] The detection assembly includes an electrode detection element 7, a field display 8, and a data transmission line 9. The electrode detection element 7 is installed on the side wall of the flow cylinder 1, and its detection end is located inside the flow cylinder 1. The electrode detection element 7 is a high-precision conductivity sensor to ensure the accuracy of the measurement results. The transmission end of the electrode detection element 7 is installed on the input end of the field display 8. The detection data is transmitted to the field display 8 and displayed as data. The data transmission line 9 is installed on the output end of the field display 8. The other end of the data transmission line 9 is connected to the control terminal. The relevant data on the field display 8 is transmitted to the control terminal through the data transmission line 9 for reference by the personnel and for making control decisions.

[0029] The auxiliary components include an exhaust component 4 and a drain pipe 5. The exhaust component 4 is installed at the top of the flow cylinder 1 and is connected to the interior of the flow cylinder 1. The exhaust component 4 uses a quick-connect flange male and female interface, and the gas in the cavity can be discharged automatically or manually by light touch, avoiding gas interference with the detection and thus ensuring high detection efficiency.

[0030] The quick-connect flange male and female interlocking interface compresses the regenerated gas to the exhaust port according to the medium inlet pressure, and the exhaust component 4 is installed in a straight-plug male and female interlocking manner.

[0031] The drain pipe 5 is installed at the bottom of the flow cylinder 1. The drain pipe 5 and the flow cylinder 1 are interconnected. A control valve 6 is also installed at the end of the drain pipe 5 near the flow cylinder 1. The drain efficiency of the drain pipe 5 is controlled by the control valve 6.

[0032] Example 2:

[0033] like Figure 1 As shown, based on Embodiment 1, the sealing assembly includes a flange 10 and bolts 11. The bolts 11 are arranged around the flange 10 at intervals. There are two sets of flanges 10. One set of flanges 10 is installed on the side wall of the flow cylinder 1. The two sets of flanges 10 are connected and separated by the bolts 11 arranged around them.

[0034] Example 3:

[0035] like Figures 2-5 As shown, based on Embodiment 1, the sealing assembly includes a main sealing plate 12, a snap ring 13, a secondary sealing plate 14, a locking component, an adjusting component, a sealing component, and a fixing component.

[0036] The secondary sealing plate 14 is annular and is fixedly installed on the outer wall of one end of the flow cylinder 1. The main sealing plate 12 is disc-shaped and its outer diameter is matched with that of the secondary sealing plate 14. The main sealing plate 12 is located at the end of the secondary sealing plate 14 away from the flow cylinder 1.

[0037] The buckle ring 13 is a circular ring plate, the buckle ring 13 is sleeved on the outside of the main sealing disc 12, the inner diameter of the buckle ring 13 is matched with the outer diameter of the main sealing disc 12, and the thickness of the buckle ring 13 is greater than the sum of the thicknesses of the main sealing disc 12 and the secondary sealing disc 14.

[0038] The adjusting part is installed between the main sealing disc 12 and the buckle ring 13, and the buckle ring 13 can be rotationally adjusted on the main sealing disc 12 through the adjusting part.

[0039] The clamping part is installed on the buckle ring 13 and the secondary sealing disc 14, and the buckle ring 13 can drive the main sealing disc 12 to be buckled and installed on the secondary sealing disc 14 through rotational adjustment through the clamping part.

[0040] The sealing part is installed between the main sealing disc 12 and the secondary sealing disc 14, and the sealing effect between the main sealing disc 12 and the secondary sealing disc 14 can be improved through the sealing part.

[0041] The fixing part is installed on the buckle ring 13 at a position corresponding to the secondary sealing disc 14, and the buckle ring 13 and the secondary sealing disc 14 are connected to each other through the fixing part, so as to limit the rotation of the buckle ring 13.

[0042] The adjusting part includes an adjusting ring 17 and an adjusting groove 18, the adjusting groove 18 is a “T”-shaped annular groove, the adjusting groove 18 is arranged on the side wall of the buckle ring 13 at a position corresponding to the main sealing disc 12, the adjusting ring 17 is a “T”-shaped annular plate, the size of the adjusting ring 17 is matched with the size of the adjusting groove 18, the adjusting ring 17 is fixedly installed on the outer side wall of the main sealing disc 12, and the buckle ring 13 is movably installed on the main sealing disc 12 through the adjusting ring 17 and the adjusting groove 18.

[0043] The clamping part includes a buckle block 19 and a through groove 22, the buckle block 19 is annularly and intervally fixedly installed on the inner side wall of the buckle ring 13 on the side close to the flow tube 1, the sum of the thicknesses of the main sealing disc 12, the secondary sealing disc 14 and the buckle block 19 is matched with the thickness of the buckle ring 13, the through groove 22 is annularly and intervally arranged on the side wall of the secondary sealing disc 14, and the size of the through groove 22 is matched with the size of the buckle block 19, when the main sealing disc 12 is moved to the secondary sealing disc 14 by the buckle ring 13, the buckle block 19 on the buckle ring 13 moves to the other side of the secondary sealing disc 14 through the through groove 22 on the secondary sealing disc 14, and the buckle block 19 and the through groove 22 on the secondary sealing disc 14 are dislocated by rotating the buckle ring 13, so that the main sealing disc 12 can be buckled and installed on the secondary sealing disc 14 through a plurality of groups of buckle blocks 19.

[0044] The closure includes a sealing ring 20 and a sealing ring 21, and the closure and the secondary sealing disc 14 are arranged in a staggered manner with a through groove 22, that is, the through groove 22 is arranged at the outer ring position of the secondary sealing disc 14, the closure is arranged at the inner ring position of the secondary sealing disc 14, the sealing ring 20 is fixedly arranged on the side wall of the side of the primary sealing disc 12 and the secondary sealing disc 14 close to each other, and the sealing ring 20 on the primary sealing disc 12 and the sealing ring 20 on the secondary sealing disc 14 are both protruded to the side close to each other, the sealing ring 20 is made of a material capable of being deformed under pressure, and the material of the sealing ring 20 includes but is not limited to rubber, when the primary sealing disc 12 moves to the side close to the secondary sealing disc 14, the two groups of sealing rings 20 will be deformed under pressure, the convex surface of the sealing ring 20 will gradually change to a plane under pressure, the sealing ring 21 is fixedly arranged on the two sides of the sealing ring 20 on the primary sealing disc 12 and the secondary sealing disc 14, the sealing ring 21 is a ring-shaped plate with a trapezoidal cross section, the sealing ring 21 is inclined to the side close to the sealing ring 20, and the thickness of the sealing ring 21 is smaller than the thickness of the sealing ring 20 (specifically, the distance from the most protruding end to the mounting surface), the thickness of the sealing ring 21 is at least one half to two thirds of the thickness of the sealing ring 20, and the specific thickness of the sealing ring 21 is set according to the deformation coefficient of the sealing ring 20, specifically, when the primary sealing disc 12 moves to the side close to the secondary sealing disc 14, the convex surfaces of the two groups of sealing rings 20 will be deformed under pressure and gradually change to a plane, at this time, the deformed sealing ring 20 will fill the area between the two groups of sealing rings 21 until the sealing ring 21 on the primary sealing disc 12 and the sealing ring 21 on the secondary sealing disc 14 are in close contact, and additionally, the buckle block 19 on the buckle ring 13 just passes through the through groove 22 on the secondary sealing disc 14 at this time; the mutual extrusion and close contact of the two groups of sealing rings 20 can also increase the resistance between the primary sealing disc 12 and the secondary sealing disc 14, so that the primary sealing disc 12 cannot rotate relative to the secondary sealing disc 14 after installation.

[0045] The fixing member includes a locking screw 15 and a locking screw groove 16, and the locking screw groove 16 is arranged on the top end of the secondary sealing disc 14 and the side wall of the buckle ring 13, specifically, after the primary sealing disc 12 is buckled and installed on the secondary sealing disc 14, the buckle ring 13 is rotated to adjust the buckle block 19 to a suitable position on the side of the secondary sealing disc 14 away from the primary sealing disc 12, at this time, the locking screw groove 16 on the buckle ring 13 and the locking screw groove 16 on the secondary sealing disc 14 are in corresponding positions, the locking screw 15 is screwedly arranged in the locking screw groove 16, and the bottom end of the locking screw 15 is extended into the locking screw groove 16 on the secondary sealing disc 14 through screw rotation.

[0046] The working principle of the utility model is:

[0047] The utility model discloses a flow-through cylinder 1, the electrode detection piece 7, the liquid inlet pipe 2, the control valve 6, the liquid outlet pipe 3, the control valve 6, the discharge pipe 5, the discharge piece 4, the data transmission wire 9 and the on-site display 8 are connected.

[0048] When carrying out the regular dismounting detection flow-through cylinder 1, by closing the control valve 6 on the liquid inlet pipe 2, open the control valve 6 on the discharge pipe 5, the medium in the flow-through cylinder 1 is discharged, thereby detecting the inside of the flow-through cylinder 1 and carrying out the maintenance.

[0049] When carrying out the dismounting operation:

[0050] In the embodiment two, by screwing the bolt piece 11 on the flange plate 10 in sequence, until the bolt piece 11 on the flange plate 10 is all screwed and dismounted, thereby making the two groups of flange plates 10 on both ends of the flow-through cylinder 1 complete separation, thereby completing the dismounting.

[0051] In the embodiment three, by screwing the lock screw 15 on the buckle ring 13, make the bottom end of the lock screw 15 move out the lock thread groove 16 on the secondary sealing disc 14 by screwing, and rotate the buckle ring 13, make the buckle ring 13 drive the buckle block 19 to move to the corresponding position of the through slot 22 on the secondary sealing disc 14 and move out, thereby making the buckle ring 13 can drive the main sealing disc 12 complete and the secondary sealing disc 14 separation, thereby completing the dismounting.

[0052] The above, only for the preferable specific implementation mode of the utility model, but the protection scope of the utility model does not limit to this, any skilled in the art person in the utility model disclosed technical range, according to the utility model technical scheme and the utility model conception equivalent replacement or change, all should cover in the protection scope of the utility model.

Claims

1. An on-line detection flow cell for ultrasonic brine concentration, comprising a flow assembly, a detection assembly and an auxiliary assembly, the detection assembly is installed on the side of the flow assembly, and the auxiliary assembly is installed on the flow assembly, characterized in that: The flow assembly comprises a flow cylinder (1), a liquid inlet pipe (2), a liquid outlet pipe (3), a control valve (6) and a sealing assembly, the sealing assembly is detachably mounted on both ends of the flow cylinder (1), the two ends of the flow cylinder (1) are sealed by the sealing assembly, one end of the liquid inlet pipe (2) is mounted on the bottom end of the sealing assembly on one side of the flow cylinder (1), one end of the liquid outlet pipe (3) is mounted on the top end of the sealing assembly on the other side of the flow cylinder (1), the control valve (6) is mounted on the liquid inlet pipe (2) and the liquid outlet pipe (3) near one end of the flow cylinder (1) respectively, the auxiliary assembly comprises an exhaust member (4) and a purge pipe (5), the exhaust member (4) is mounted on the top end of the flow cylinder (1), the exhaust member (4) uses a quick plug flange female buckle interface, and the exhaust member (4) is directly inserted into the female buckle type, the purge pipe (5) is mounted on the bottom end of the flow cylinder (1), and the purge pipe (5) is also provided with a control valve (6) near one end of the flow cylinder (1).

2. The flow cell for on-line detection of brine concentration according to claim 1, characterized in that: The sealing assembly comprises a flange plate (10) and a bolt member (11), the bolt member (11) is arranged on the flange plate (10) in a ring shape, the flange plate (10) is divided into two groups, one group of the flange plate (10) is mounted on the side wall of the flow cylinder (1), and the two groups of the flange plate (10) are connected and separated by the bolt member (11) arranged in a ring shape.

3. The flow cell for on-line detection of brine concentration according to claim 1, characterized in that: The sealing assembly comprises a main sealing plate (12), a buckle ring (13), a secondary sealing plate (14), a clamping member, an adjusting member, a sealing member and a fixing member, the secondary sealing plate (14) is fixedly mounted on the outer wall of one end of the flow cylinder (1), the main sealing plate (12) is arranged on the secondary sealing plate (14) away from one end of the flow cylinder (1), the buckle ring (13) is sleeved on the outside of the main sealing plate (12), the adjusting member is rotatably arranged between the main sealing plate (12) and the buckle ring (13), the clamping member is arranged on the buckle ring (13) and the secondary sealing plate (14), the sealing member is arranged between the main sealing plate (12) and the secondary sealing plate (14), and the fixing member is arranged on the buckle ring (13) corresponding to the position of the secondary sealing plate (14).

4. The flow cell for on-line detection of brine concentration according to claim 3, characterized in that: The clamping member comprises a buckle block (19) and a through groove (22), the buckle block (19) is fixedly arranged on the inner ring side wall of the buckle ring (13) near one side of the flow cylinder (1) in a ring shape, and the through groove (22) is arranged on the side wall of the secondary sealing plate (14) in a ring shape, and the size of the through groove (22) is matched with the size of the buckle block (19).

5. The flow cell for on-line detection of brine concentration according to claim 3, wherein: The sealing member comprises a sealing ring (20) and a sealing ring (21), the sealing member and the through groove (22) of the secondary sealing plate (14) are arranged in a staggered manner, the sealing ring (20) is fixedly arranged on the side wall of the main sealing plate (12) and the secondary sealing plate (14) close to each other, and the sealing ring (21) is fixedly arranged on both sides of the sealing ring (20) of the main sealing plate (12) and the secondary sealing plate (14).

6. The flow cell for on-line detection of brine concentration according to claim 5, characterized in that: The sealing ring (20) on the primary sealing disc (12) and the sealing ring (20) on the secondary sealing disc (14) are both convex to the side close to each other, and the sealing ring (21) is a ring-shaped plate with a trapezoidal cross section, which is inclined to the side close to the sealing ring (20).

7. The flow cell for on-line detection of brine concentration according to claim 3, characterized in that: The fixing member comprises a locking screw (15) and a locking screw groove (16), the locking screw groove (16) is arranged on the top end of the secondary sealing disc (14) and the side wall of the buckle ring (13), and the locking screw groove (16) on the secondary sealing disc (14) corresponds to the locking screw groove (16) on the buckle ring (13) when the closure assembly is locked.

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