Accurate temperature control device for circulating water path in water electrolysis test

Abstract

The invention provides an electrolytic water test circulating waterway accurate temperature control device, which comprises a device main body, an instant heater assembly and a spiral heating pipe, a circulating liquid tank for storing electrolyte is arranged at the right rear end of the internal composition of the device main body, and a group of PID temperature controllers are arranged at the right end of the lower part of the circulating liquid tank. Compared with the prior art, the device has the following beneficial effects that the device body, the instant heater assembly and the spiral heating pipe are additionally arranged, the front flange connecting piece and the rear flange connecting piece are installed at the front end and the rear end of the thick film heating pipe correspondingly, and the first connecting flange and the second connecting flange are connected through the bolts; the instant heater assembly is fixed between the second conveying pipe and the third conveying pipe, the thermocouple temperature sensor is fixed through the mounting flange, the spiral heating pipe is mounted on the inner side of the circulating liquid tank, secondary heating of electrolyte can be achieved, precise temperature control is achieved, and the spiral heating pipe can be conveniently disassembled and assembled by additionally arranging the device body and the spiral heating pipe.

Description

Technical Field

[0001] The invention belongs to the field of electrolytic water testing, and in particular relates to a precise temperature control device for a circulating water circuit of an electrolytic water testing device. Background Art

[0002] Electrolysis water testing usually refers to analyzing the chemical composition of water by electrolysis. The test results of AEM and PEM electrolysis water test benches are greatly affected by temperature. Studies have shown that appropriately increasing the electrolyte temperature entering the tank can improve efficiency, accelerate the transmission rate of hydrogen ions, and increase the reaction rate of the electrolyzer, thereby increasing the production of hydrogen. However, too high an inlet electrolyte temperature will cause the membrane material inside the electrolyzer to fail, easily lose water and degrade, and affect the stability and life of the electrolyzer. Usually, the test temperature of the electrolyte in the industry is between 60℃ and 80℃. The stability of temperature during the test and the accuracy of the inlet temperature are important indicators of the performance of the test bench. At present, the inlet temperature of the electrolysis water test bench is mainly achieved by heating the temperature of the circulating liquid tank to the set value, and then passing through the filter, circulating water pump, flowmeter, valve, pipeline, etc. into the electrolyzer. This process technology has many shortcomings: high system energy consumption, slow heating speed, high time cost, inaccurate temperature control, poor safety, and high equipment cost. Therefore, it is not conducive to the test research of electrolysis water testing.

[0003] In summary, the flow of electrolyte from the circulating liquid tank to the electrolytic cell will cause a large amount of heat loss, resulting in difficulty in accurately controlling the temperature of the electrolyte entering the electrolytic cell. Therefore, it is hoped to propose a new structure to solve the above technical problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a precise temperature control device for a circulating water circuit of an electrolyzed water test to solve the problems raised in the above-mentioned background technology.

[0005] The present invention is realized by the following technical scheme: a precise temperature control device for a circulating water circuit of an electrolytic water test, comprising: a device body, an instant heater assembly and a spiral heating tube, wherein the right rear end of the internal components of the device body is provided with a circulating liquid tank for storing electrolyte, a group of PID temperature controllers are provided at the right end below the circulating liquid tank, a delivery pipe 1 for delivering electrolyte is provided below the circulating liquid tank, a circulating pump is provided on the left side of the delivery pipe 1, a delivery pipe 2 is provided on the left side of the circulating pump, a connecting flange 1 is fixedly connected to the front end of the delivery pipe 2, and an electrolytic tank for electrolysis is provided at the left front end of the internal components of the device body;

[0006] A delivery pipe 3 is provided at the rear side of the electrolytic cell, and a connection flange 1 is fixedly connected to the rear end of the delivery pipe 3. An instant heating component for secondary instant heating is provided between the front and rear groups of the connection flanges 1, and the instant heating component includes a thick film heating pipe, a front flange connector and a rear flange connector;

[0007] A spiral heating tube for heating the electrolyte once is provided on the inner side of the circulating liquid tank, a thermocouple temperature sensor for measuring the temperature of the electrolyte is provided on the upper side of the outer side of the delivery pipe three, a group of outer insulation layers for heat preservation are provided on the outer sides of the delivery pipe one and the delivery pipe two, and a holding piece for conveniently fixing the outer insulation layer is provided on the upper side of the outer insulation layer. The electrolyte inside the circulating liquid tank can be discharged by using a circulating pump, and the PID temperature controller can control the heating temperature of the electrolyte inside the circulating liquid tank.

[0008] As a preferred embodiment, a reflux delivery pipe 1 for circulating electrolyte is provided at the front side of the electrolytic cell, a reflux delivery pipe 2 is provided at the front side of the circulating liquid tank, and a group of circulating pumps is also provided between the reflux delivery pipe 1 and the reflux delivery pipe 2;

[0009] The front flange connector and the rear flange connector are both provided with a connecting flange 2 at one end away from the thick film heating tube for convenient connection with the device body. The contact surfaces of the connecting flange 1 and the connecting flange 2 are in contact and are fixed by bolts. The instant heater assembly is connected and fixed by the connecting flange 1 and the connecting flange 2, so that the instant heater assembly can be disassembled and assembled separately in a targeted manner.

[0010] As a preferred embodiment, the front and rear ends of the thick film heating tube are fixedly connected with a set of connecting columns 1, the inner side surface of the connecting column 1 at the front end is provided with a front internal thread, and the outer side surface of the connecting column 1 at the rear end is provided with a rear external thread;

[0011] The rear end of the connecting flange 2 at the front end and the front end of the connecting flange 2 at the rear end are both fixedly connected with a group of connecting columns 2. The outer side surface of the connecting column 2 at the front end is provided with a front external thread, and the inner side surface of the connecting column 2 at the rear end is provided with a rear internal thread. The front internal thread and the front external thread as well as the rear external thread and the rear internal thread are all threadedly connected. The model of the thick film heating tube is XHD-Y-600G040160 / 220V. The thick film heating tube can instantly heat the electrolyte flowing through it, so that the electrolyte heated once can be quickly heated to the set temperature value for the second time, and introduced into the electrolytic cell over a short distance through the conveying pipe 3, which can reduce heat loss and improve heating efficiency.

[0012] As a preferred embodiment, a mounting column is fixedly connected to the upper end of the outer side of the delivery pipe three, and a mounting flange is fixedly connected above the mounting column. The thermocouple temperature sensor passes through the mounting flange and the mounting column and penetrates into the inner side of the delivery pipe three and is fixed to the mounting flange with bolts. The model of the thermocouple temperature sensor is WRN-130.

[0013] As a preferred embodiment, the spiral heating tube has a spiral heating tube body at the lower end of its internal components, a circuit seat is provided above the spiral heating tube body, and a wire is provided above the circuit seat;

[0014] A through hole is vertically penetrated at the upper right end of the outer side surface of the circulating liquid tank, a rubber wire clip is installed inside the through hole, the rubber wire clip and the through hole are an interference fit installation structure, and the wire passes through the rubber wire clip and is also an interference fit installation structure.

[0015] As a preferred embodiment, a tank cover is provided above the circulating liquid tank, a support frame for supporting use is provided at the lower end of the outer side of the circulating liquid tank, and a fixed support seat for supporting and placing the spiral heating tube is fixedly connected to the upper left end of the inner side of the circulating liquid tank;

[0016] A group of telescopic columns are fixedly connected to the upper right end of the inner side of the circulating liquid tank, and a movable supporting seat for supporting and placing the spiral heating tube in cooperation with the fixed supporting seat is provided on the left side of the telescopic column. By placing the spiral heating tube inside the circulating liquid tank, the fixed supporting seat and the movable supporting seat can jointly support and place the spiral heating tube, which can facilitate the disassembly and assembly of the spiral heating tube.

[0017] As a preferred embodiment, a fixing hole is opened at the upper end of the outer side surface of the telescopic column, a fixing column is provided at the right end of the outer side of the movable supporting seat, a fixing spring is provided under the fixing column, and the fixing column is engaged with the fixing hole under the elastic force of the fixing spring.

[0018] As a preferred embodiment, a group of auxiliary frames are fixedly connected to the outer sides of the conveying pipe 1 and the conveying pipe 2, and a group of guide grooves for guiding the holding member are opened on the inner side surfaces of the left and right ends of the auxiliary frames, and a rotating hole is opened on the upper surface of the auxiliary frames;

[0019] A bearing is installed inside the rotating hole, a holding stud is arranged inside the bearing, an adjusting plate is arranged at the upper end of the internal component of the holding part, and guide blocks are fixedly connected to both left and right ends of the adjusting plate.

[0020] As a preferred embodiment, the guide block and the guide groove are movably engaged with each other, an arc-shaped holding plate is fixedly connected below the adjustment plate, and the inner side surface of the arc-shaped holding plate is pressed and fitted with the outer insulation layer;

[0021] A pressing threaded hole is provided at the center of the upper surface of the adjusting plate, and the pressing stud is threadedly connected to the pressing threaded hole. Rotating the pressing stud can cooperate with the pressing threaded hole to drive the pressing part to move up and down, and press and fix the external insulation layer when moving downward, so as to keep the heat insulated and reduce heat loss.

[0022] After adopting the above technical scheme, the beneficial effects of the present invention are as follows: by adding a device main body, an instant heater assembly and a spiral heating tube, the front flange connector and the rear flange connector are respectively installed to the front and rear ends of the thick film heating tube, the connecting flange one and the connecting flange two are connected by bolts, the instant heater assembly is fixed between the conveying pipe two and the conveying pipe three, and the thermocouple temperature sensor is fixed by the mounting flange, and the spiral heating tube is installed to the inner side of the circulating liquid tank, so that the secondary heating of the electrolyte can be accurately controlled, and by adding a device main body and a spiral heating tube, the spiral heating tube can be conveniently disassembled and assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 This is a schematic diagram of the overall structure on the left side of a precise temperature control device for a circulating water circuit of an electrolyzed water test according to the present invention.

[0025] Figure 2 This is a schematic diagram of the overall structure on the right side of a precise temperature control device for a circulating water circuit of an electrolyzed water test according to the present invention.

[0026] Figure 3 This is a schematic structural diagram of the device main body in a precise temperature control device for a circulating water circuit of an electrolyzed water test according to the present invention.

[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0028] Figure 5 The present invention is a schematic structural diagram of an instant heater assembly in a precise temperature control device for a circulating water circuit of an electrolyzed water test.

[0029] Figure 6 This is a schematic structural diagram of a front flange connector in a precise temperature control device for a circulating water circuit in an electrolyzed water test according to the present invention.

[0030] Figure 7 It is a schematic diagram of the structure of a thick film heating tube in a precise temperature control device for a circulating water circuit of an electrolyzed water test according to the present invention.

[0031] Figure 8 The present invention is a schematic diagram of the structure of a spiral heating tube in a precise temperature control device for a circulating water circuit of an electrolyzed water test.

[0032] Fig. 9 The present invention is a schematic diagram of the structure of a pressure-holding component in a precise temperature control device for a circulating water circuit of an electrolyzed water test.

[0033] In the figure, 100-device body, 101-circulating liquid tank, 102-support frame, 103-tank cover, 104-rubber wire clamp, 105-fixed support seat, 106-telescopic column, 107-movable support seat, 108-transmission pipe 1, 109-auxiliary frame, 110-pressing stud, 111-guide groove, 112-circulating pump, 113-connecting flange 1, 114-electrolyzer, 115-mounting flange, 116-reflux transmission pipe 2;

[0034] 200-instant heater assembly, 201-thick film heating tube, 202-front flange connector, 203-rear flange connector;

[0035] 300- spiral heating tube, 301- circuit seat, 302- spiral heating tube body, 303- wire;

[0036] 400-holding piece, 401-adjusting plate, 402-guide block, 403-holding threaded hole, 404-arc-shaped holding plate;

[0037] 500-external insulation layer;

[0038] 600-Thermocouple temperature sensor;

[0039] 201a-front internal thread, 201b-rear external thread;

[0040] 202a-Front external thread. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figures 1 to 9The present invention provides a technical solution: a precise temperature control device for a circulating water circuit of an electrolytic water test, comprising: a device body 100, an instant heater assembly 200 and a spiral heating tube 300, wherein the right rear end of the internal components of the device body 100 is provided with a circulating liquid tank 101 for storing electrolyte, and a group of PID temperature controllers are provided at the right end below the circulating liquid tank 101;

[0043] A delivery pipe 108 for delivering electrolyte is provided below the circulating liquid tank 101, a circulating pump 112 is provided on the left side of the delivery pipe 108, a delivery pipe 2 is provided on the left side of the circulating pump 112, a connecting flange 113 is fixedly connected to the front end of the delivery pipe 2, and an electrolytic tank 114 for electrolysis is provided at the left front end of the internal components of the device body 100;

[0044] A delivery pipe 3 is provided at the rear side of the electrolytic cell 114, and a connection flange 113 is fixedly connected to the rear end of the delivery pipe 3. An instant heating component 200 for secondary instant heating is provided between the front and rear sets of the connection flanges 113. The instant heating component 200 includes a thick film heating pipe 201, a front flange connector 202 and a rear flange connector 203.

[0045] A spiral heating tube 300 for heating the electrolyte once is provided on the inner side of the circulating liquid tank 101, a thermocouple temperature sensor 600 for measuring the temperature of the electrolyte is provided on the upper side of the outer side of the delivery pipe 3, a group of outer insulation layers 500 for heat preservation are provided on the outer sides of the delivery pipe 1 108 and the delivery pipe 2, and a holding piece 400 for conveniently fixing the outer insulation layer 500 is provided on the upper side of the outer insulation layer 500. The electrolyte inside the circulating liquid tank 101 can be discharged by using the circulating pump 112, and the PID temperature controller can control the heating temperature of the electrolyte inside the circulating liquid tank 101.

[0046] A reflux pipe 1 for circulating electrolyte is provided at the front side of the electrolytic tank 114, a reflux pipe 2 116 is provided at the front side of the circulating liquid tank 101, and a group of circulating pumps 112 is also provided between the reflux pipe 1 and the reflux pipe 2 116;

[0047] The front flange connector 202 and the rear flange connector 203 are both provided with a connecting flange 202a at one end away from the thick film heating tube 201 for convenient connection with the device body 100. The contact surfaces of the connecting flange 113 and the connecting flange 202a are in contact with each other and are fixed by bolts. The instant heater assembly 200 is connected and fixed to the connecting flange 2 202a via the connecting flange 113, so that the instant heater assembly 200 can be disassembled and assembled separately in a targeted manner.

[0048] The front and rear ends of the thick film heating tube 201 are fixedly connected with a set of connecting columns 1, the inner side of the front connecting column 1 is provided with a front internal thread 201a, and the outer side of the rear connecting column 1 is provided with a rear external thread 201b;

[0049] The rear end of the front connecting flange 202a and the front end of the rear connecting flange 202a are fixedly connected with a group of connecting columns 2. The outer side surface of the front connecting column 2 is provided with a front external thread 202b, and the inner side surface of the rear connecting column 2 is provided with a rear internal thread. The front internal thread 201a and the front external thread 202b as well as the rear external thread 201b and the rear internal thread are all threadedly connected. The model of the thick film heating tube 201 is XHD-Y-600G040160 / 220V. The thick film heating tube 201 can instantly heat the electrolyte flowing through it, so that the electrolyte heated once is quickly heated to the set temperature value for the second time, and is introduced into the electrolytic cell 114 over a short distance through the conveying pipe 3, which can reduce heat loss and improve heating efficiency.

[0050] A mounting column is fixedly connected to the upper end of the outer side of the delivery pipe 3, and a mounting flange 115 is fixedly connected above the mounting column. The thermocouple temperature sensor 600 passes through the mounting flange 115 and the mounting column and penetrates into the inner side of the delivery pipe 3 and is fixed to the mounting flange 115 using bolts.

[0051] See also Figure 1-Figure 7 As the first embodiment of the present invention: First, the user splices the rear film heating tube 201, the front flange connector 202 and the rear flange connector 203 into a set of instant heater components 200 by screwing the front internal thread 201a with the front external thread 202b and the rear external thread 201b with the rear internal thread, and fixes the two sets of connecting flanges 202a and the two sets of connecting flanges 1 113 by bolts, and fixes the instant heater components 200 between the delivery pipe 2 and the delivery pipe 3. Secondly, the electrolyte inside the circulating liquid tank 101 can be heated once through the spiral heating tube 300, and the spiral heating tube body 3 in the spiral heating tube 300 is fixed. 02 is a spiral structure, which can heat the electrolyte at multiple positions simultaneously to improve the heating efficiency. The electrolyte is heated once and the temperature is detected and controlled by the PID temperature controller to be heated to 50°C. It is discharged through the delivery pipe 108 by the action of the circulation pump 112, and then flows through the delivery pipe 2 and passes through the instant heater assembly 200 for secondary heating, so that the electrolyte temperature quickly rises to the set temperature value after the secondary heating, and flows through the delivery pipe 3 and the temperature value is confirmed by the thermocouple temperature sensor 600, so that the electrolyte after secondary heating only needs to flow through the short distance of the delivery pipe 3 to enter the inner side of the electrolytic cell 114, thereby reducing heat loss and improving heating efficiency.

[0052] The spiral heating tube 300 has a spiral heating tube body 302 at the lower end thereof, a circuit seat 301 is arranged above the spiral heating tube body 302, and a wire 303 is arranged above the circuit seat 301;

[0053] A through hole is vertically penetrated through the upper right end of the outer side of the circulating liquid tank 101, and a rubber wire clip 104 is installed inside the through hole. The rubber wire clip 104 and the through hole are an interference fit installation structure, and the wire 303 passes through the rubber wire clip 104 and is also an interference fit installation structure.

[0054] A support frame 102 for supporting is provided at the lower end of the outer side of the circulating liquid tank 101, and a fixed support seat 105 for supporting and placing the spiral heating tube 300 is fixedly connected to the upper left end of the inner side of the circulating liquid tank 101;

[0055] A group of telescopic columns 106 are fixedly connected to the upper right end of the inner side of the circulating liquid tank 101, and a movable supporting seat 107 for supporting and placing the spiral heating tube 300 in cooperation with the fixed supporting seat 105 is provided on the left side of the telescopic column 106. When the spiral heating tube 300 is placed inside the circulating liquid tank 101, the fixed supporting seat 105 and the movable supporting seat 107 can jointly support and place the spiral heating tube 300, which can facilitate the disassembly and assembly of the spiral heating tube 300.

[0056] A fixing hole is provided at the upper end of the outer side of the telescopic column 106, a fixing column is provided at the right end of the outer side of the movable supporting seat 107, a fixing spring is provided below the fixing column, and the fixing column is engaged with the fixing hole under the elastic force of the fixing spring.

[0057] See also Figure 1-Figure 3 and Figure 8 , as the second embodiment of the present invention: Based on the above-mentioned first embodiment, the spiral heating tube 300 is a consumable part, which needs to be maintained or replaced after being used for a period of time. The user can place the spiral heating tube 300 inside the circulating liquid tank 101, and first pre-support it through the fixed support seat 105, and then telescopically move the movable support seat 107 to the left, and make the fixed column engage with the fixed hole under the action of the elastic force of the fixed spring, so that the movable support seat 107 and the telescopic column 106 are relatively fixed, so that the fixed support seat 105 and the movable support seat 107 can jointly support and place the spiral heating tube 300, and the guide 303 can pass through the rubber wire clip 104 to connect with the external power supply, so that the disassembly and assembly of the spiral heating tube 300 can be facilitated.

[0058] A set of auxiliary frames 109 are fixedly connected to the outside of the conveying pipe 108 and the conveying pipe 2. A set of guide grooves 111 for guiding the holding member 400 are opened on the inner side surfaces of the left and right ends of the auxiliary frames 109. A rotating hole is opened on the upper surface of the auxiliary frames 109.

[0059] A bearing is installed inside the rotating hole, and a holding stud 110 is arranged inside the bearing. The upper end of the holding member 400 is provided with an adjustment plate 401 in its internal components, and the left and right ends of the adjustment plate 401 are fixedly connected with guide blocks 402.

[0060] The guide block 402 and the guide groove 111 are movably engaged with each other, and an arc-shaped pressing plate 404 is fixedly connected below the adjustment plate 401, and the inner side of the arc-shaped pressing plate 404 and the outer insulation layer 500 are pressed and fitted with each other;

[0061] A pressing threaded hole 403 is provided at the center of the upper surface of the adjustment plate 401, and the pressing stud 110 is threadedly connected to the pressing threaded hole 403. Rotating the pressing stud 110 can cooperate with the pressing threaded hole 403 to drive the pressing part 400 to move up and down, and press and fix the external insulation layer 500 when moving downward, so as to keep warm and reduce heat loss.

[0062] See also Figure 1-Figure 3 and Fig. 9 As the third embodiment of the present invention: Based on the above-mentioned first embodiment, there will still be a lot of heat loss between the primary heating and the secondary heating. The user can roll the outer insulation layer 500 onto the outside of the conveying pipe 108 and the conveying pipe 2, and place the connection on the inner side of the auxiliary frame 109. Then, the pressing stud 110 can be rotated to cooperate with the pressing threaded hole 403 to drive the pressing member 400 to move up and down and assist in guiding the movement through the engagement of the guide block 402 and the guide groove 111. When the pressing member 400 moves downward, the arc-shaped pressing plate 404 can be pressed and fixed to the outer insulation layer 500, thereby maintaining heat and reducing heat loss.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A precise temperature control device for a circulating water circuit of an electrolyzed water test, comprising: The device body (100), the instant heater assembly (200) and the spiral heating tube (300) are characterized in that the right rear end of the internal components of the device body (100) is provided with a circulating liquid tank (101) for storing electrolyte, and a group of PID temperature controllers are provided at the right end below the circulating liquid tank (101); A delivery pipe 1 (108) for delivering electrolyte is provided below the circulating liquid tank (101), a circulating pump (112) is provided on the left side of the delivery pipe 1 (108), a delivery pipe 2 is provided on the left side of the circulating pump (112), a connecting flange 1 (113) is fixedly connected to the front end of the delivery pipe 2, and an electrolytic tank (114) for electrolysis is provided at the left front end of the internal components of the device body (100); A delivery pipe 3 is provided at the rear side of the electrolytic cell (114), and a connection flange 1 (113) is fixedly connected to the rear end of the delivery pipe 3. An instant heating component (200) for secondary instant heating is provided between the front and rear groups of the connection flange 1 (113), and the instant heating component (200) comprises a thick film heating pipe (201), a front flange connector (202) and a rear flange connector (203); A spiral heating tube (300) for heating the electrolyte once is provided inside the circulating liquid tank (101), a thermocouple temperature sensor (600) for measuring the electrolyte temperature is provided above the outer side of the third delivery tube, a group of outer insulation layers (500) for heat preservation are provided outside the first delivery tube (108) and the second delivery tube, and a holding piece (400) for conveniently fixing the outer insulation layer (500) is provided above the outer side of the outer insulation layer (500).

2. A precise temperature control device for a circulating water circuit for electrolyzed water testing as claimed in claim 1, characterized in that: A reflux delivery pipe 1 for circulating electrolyte is provided at the front side of the electrolytic cell (114), a reflux delivery pipe 2 (116) is provided at the front side of the circulating liquid tank (101), and a group of circulating pumps (112) is also provided between the reflux delivery pipe 1 and the reflux delivery pipe 2 (116); The front flange connector (202) and the rear flange connector (203) are both provided with a second connecting flange (202a) for convenient connection with the device body (100) at one end away from the thick film heating tube (201), and the contact surfaces of the first connecting flange (113) and the second connecting flange (202a) are in contact with each other and are fixed by bolt connection.

3. A precise temperature control device for circulating water circuit of electrolyzed water test as claimed in claim 2, characterized in that: The front and rear ends of the thick film heating tube (201) are both fixedly connected with a group of connecting columns 1, the inner side surface of the connecting column 1 at the front end is provided with a front internal thread (201a), and the outer side surface of the connecting column 1 at the rear end is provided with a rear external thread (201b); The rear end of the front connecting flange 2 (202a) and the front end of the rear connecting flange 2 (202a) are both fixedly connected with a set of connecting columns 2. The outer side surface of the front connecting column 2 is provided with a front external thread (202b), and the inner side surface of the rear connecting column 2 is provided with a rear internal thread. The front internal thread (201a) and the front external thread (202b) as well as the rear external thread (201b) and the rear internal thread are all threadedly matched.

4. A precise temperature control device for circulating water circuit of electrolyzed water test as claimed in claim 3, characterized in that: The upper end of the outer side of the delivery pipe 3 is fixedly connected with a mounting column, and the upper side of the mounting column is fixedly connected with a mounting flange (115). The thermocouple temperature sensor (600) passes through the mounting flange (115) and the mounting column and penetrates into the inner side of the delivery pipe 3 and is fixed to the mounting flange (115) by bolts.

5. The precise temperature control device for circulating water circuit of electrolyzed water test according to claim 1, characterized in that: The spiral heating tube (300) has a spiral heating tube body (302) at its lower end, a circuit seat (301) is provided above the spiral heating tube body (302), and a wire (303) is provided above the circuit seat (301); A through hole is vertically penetrated through the upper right end of the outer side surface of the circulating liquid tank (101), a rubber wire clamp (104) is installed inside the through hole, the rubber wire clamp (104) and the through hole are an interference fit installation structure, and the wire (303) passes through the rubber wire clamp (104) and is also an interference fit installation structure.

6. The precise temperature control device for circulating water circuit of electrolyzed water test according to claim 1, characterized in that: A tank cover (103) is provided above the circulating liquid tank (101); a support frame (102) for supporting is provided at the lower end of the outer side of the circulating liquid tank (101); and a fixed support seat (105) for supporting and placing the spiral heating tube (300) is fixedly connected to the upper left end of the inner side of the circulating liquid tank (101); A group of telescopic columns (106) are fixedly connected to the upper right end of the inner side of the circulating liquid tank (101), and a movable supporting seat (107) for supporting and placing the spiral heating tube (300) is provided on the left side of the telescopic column (106) for use in conjunction with the fixed supporting seat (105).

7. A precise temperature control device for circulating water circuit of electrolyzed water test according to claim 6, characterized in that: A fixing hole is provided at the upper end of the outer side surface of the telescopic column (106), a fixing column is provided at the right end of the outer side of the movable supporting seat (107), a fixing spring is provided below the fixing column, and the fixing column is engaged with the fixing hole under the elastic force of the fixing spring.

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