Device for testing flowing property of pickling corrosion inhibitor

Abstract

The invention discloses a pickling corrosion inhibitor flowing property testing device which comprises a liquid circulating device, a liquid flowing device and a first support, the liquid circulating device comprises a first container, a second container and a liquid extraction assembly, and a partition plate is fixedly connected to the middle of the interior of the first container; two liquid containing bins are symmetrically arranged in the first container, a discharging pipe is fixedly connected to the bottom end of the outer side of the second container, a first fluoroplastic centrifugal pump is arranged on the outer side of the second container, and the end, away from the second container, of the discharging pipe is fixedly installed at the input end of the first fluoroplastic centrifugal pump; and a return pipe is fixedly mounted at the output end of the first fluoroplastic centrifugal pump. According to the invention, by designing a plurality of variable circulating systems, different types of tests can be carried out, including a circular flow test, a test at different flow rates and a multi-round reflux pickling solution test, and a plurality of test modes are realized through a group of devices.

Description

Technical Field

[0001] The invention relates to the field of corrosion inhibitors, in particular to a device for testing the flow properties of a pickling corrosion inhibitor. Background Art

[0002] A pickling corrosion inhibitor is a chemical substance added during the metal pickling process. It effectively inhibits acid corrosion on the metal substrate, preventing excessive corrosion and hydrogen embrittlement while ensuring the pickling effect. Widely used in various fields, most pickling corrosion inhibitors adsorb on the metal surface, forming a continuous, dense protective film. This film acts as a barrier, preventing direct contact between the acid and the metal, thereby slowing corrosion.

[0003] The purpose of the pickling corrosion inhibitor flow performance test is to evaluate the fluidity, dispersibility and stability of the pickling corrosion inhibitor in a dynamic pickling environment to ensure that it can be evenly distributed and maintain the corrosion inhibition effect in actual industrial applications. The traditional testing device is relatively simple, with a single cyclic flow test. For other comparative tests, multiple different devices are required. In addition, the metal parts used for testing in the flow environment are easy to move, resulting in errors in the test results. Therefore, a pickling corrosion inhibitor flow performance test device is urgently needed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for testing the flow properties of pickling corrosion inhibitors to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pickling corrosion inhibitor flow performance test device, comprising a liquid circulation device, a liquid flow device and a first bracket, the liquid circulation device comprising a first container, a second container and a liquid extraction component, a partition plate is fixedly connected to the middle of the interior of the first container, two liquid holding bins are symmetrically arranged inside the first container, a discharge pipe is fixedly connected to the bottom end of the outer side of the second container, a first fluoroplastic centrifugal pump is arranged on the outer side of the second container, an end of the discharge pipe away from the second container is fixedly installed at the input end of the first fluoroplastic centrifugal pump, and a reflux pump is fixedly installed at the output end of the first fluoroplastic centrifugal pump. The liquid extraction assembly comprises a first support and a second support, wherein the first support comprises a first fluoroplastic centrifugal pump and a second fluoroplastic centrifugal pump. The ...

[0006] The liquid flow device includes a drainage trough and a fixing assembly, the inner bottom end of the drainage trough is provided with a sinking groove, the top of the drainage trough is symmetrically fixedly connected with a block, and the fixing assembly includes a support base and a threaded rod, the middle part of the top of the support base is evenly fixedly connected with a triangular support rod, the top of the support base is symmetrically fixedly connected with four supporting side rods, the inner top ends of the four supporting side rods are fixedly connected with a connecting bracket, one side of the top of the support base is evenly fixedly connected with a blocking rod, and the outer top ends of the two supporting side rods close to the blocking rod are respectively fixedly connected with positioning plates, the threaded rod is threadedly connected to the middle part of the connecting bracket, and the middle part of the bottom end of the threaded rod is fixedly connected with a cross plug rod, the outer side of the cross plug rod is movably plugged with a spherical extrusion part, and the top of the spherical extrusion part is provided with a cross slot, and the cross plug rod is interference fit inserted in the inner side of the cross slot.

[0007] Preferably, three slots are provided on the top of the first bracket, and the drainage groove is movably connected to the inner side of the slots.

[0008] Preferably, one end of the top of the drainage groove is fixedly connected to a splash guard, a second plug hole is opened through the top of the splash guard, an arc-shaped guide groove is provided at one end of the drainage groove away from the splash guard, a clamping plate is provided at the bottom end of the drainage groove close to one end of the arc-shaped guide groove, the supporting bottom plate is placed on the inner side of the sinking groove, and the positioning plate is in contact with the block.

[0009] Preferably, a first plug hole is evenly penetrated through the top of the counterweight block, the bottom end of the counterweight block is evenly fixedly connected to a support rod, the top end of the counterweight block is fixedly connected to a pull rod, and both sides of the pull rod are symmetrically fixedly connected to hanging rods.

[0010] Preferably, the delivery pipe is movably plugged into the inner side of the first plug hole, the top end of the clamp is in contact with and connected to the bottom end of the counterweight, and the pull rod is mounted on the top end of the partition plate through the hanging rod.

[0011] Preferably, the connecting plate is connected to the top end of the side wall of the second container, and the bottom end of the arc-shaped guide groove is located inside the second container.

[0012] Preferably, a metal plate is provided at the top end of the triangular support rod, and the top end of the metal plate is in contact and connected with the bottom end of the spherical extrusion piece.

[0013] Preferably, the PLC controller is electrically connected to the second fluoroplastic centrifugal pump and the electromagnetic flowmeter respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention designs a variety of variable circulation systems, thereby being able to perform different types of tests, including circulating flow tests, different flow rate tests and multi-round reflux pickling solution tests. A variety of test methods can be achieved through a set of devices, and the operation is convenient and cost-effective. At the same time, the metal plate is fixed by the fixing assembly to avoid errors caused by displacement of the metal plate during the flow test. The fixing assembly is easy to disassemble and assemble, and the metal plate and the fixing assembly can be quickly disassembled and assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main body three-dimensional cross-section structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the second state structure of the main body of the present invention;

[0018] Figure 3 This is a schematic diagram of the third state structure of the main body of the present invention;

[0019] Figure 4 Schematic diagram of the structure of the liquid circulation device in the present invention;

[0020] Figure 5 Schematic diagram of the structure of the liquid extraction component in the present invention;

[0021] Figure 6 Schematic diagram of the structure of the liquid flow device in the present invention;

[0022] Figure 7 Schematic diagram of the drainage trough structure in the present invention;

[0023] Figure 8 It is a schematic diagram of the structure of the fixing component in the present invention.

[0024] In the figure: 1-liquid circulation device, 2-liquid flow device, 3-first bracket, 4-card slot, 5-first container, 6-partition plate, 7-liquid storage bin, 8-second container, 9-discharge pipe, 10-first fluoroplastic centrifugal pump, 11-reflux pipe, 12-hanging part, 13-liquid extraction component, 14-second bracket, 15-second fluoroplastic centrifugal pump, 16-drainage pipe, 17-electromagnetic flowmeter, 18-delivery pipe, 19-card head, 20-PLC controller, 21-counterweight, 22- First plug-in hole, 23-support rod, 24-pull rod, 25-hanging rod, 26-drainage groove, 27-clamping plate, 28-splash plate, 29-second plug-in hole, 30-fixing component, 31-arc-shaped guide groove, 32-sinking groove, 33-block, 34-support bottom plate, 35-triangular support rod, 36-support side rod, 37-connecting bracket, 38-threaded rod, 39-cross plug-in rod, 40-spherical extrusion part, 41-cross slot, 42-blocking rod, 43-positioning plate, 44-metal plate. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] See also Figure 1 、 Figure 4 and Figure 5, an embodiment of the present invention provides: a pickling corrosion inhibitor flow performance test device, comprising a liquid circulation device 1, a liquid flow device 2 and a first bracket 3, the liquid circulation device 1 comprises a first container 5, a second container 8 and a liquid extraction component 13, the middle of the interior of the first container 5 is fixedly connected with a partition plate 6, the interior of the first container 5 is symmetrically provided with two liquid holding bins 7, by setting the two liquid holding bins 7, new solution and reflux solution can be respectively held, the outer bottom end of the second container 8 is fixedly connected with a discharge pipe 9, the outer side of the second container 8 is provided with a first fluoroplastic centrifugal pump 10, the discharge pipe 9 is remote The end away from the second container 8 is fixedly mounted on the input end of the first fluoroplastic centrifugal pump 10, the output end of the first fluoroplastic centrifugal pump 10 is fixedly mounted with a reflux pipe 11, the end of the reflux pipe 11 away from the first fluoroplastic centrifugal pump 10 is fixedly mounted with a hanger 12, the hanger 12 is movably plugged into the top of the side wall of the first container 5, and the end of the reflux pipe 11 close to the hanger 12 is located inside the liquid storage bin 7, the input end of the first fluoroplastic centrifugal pump 10 transports the solution inside the second container 8 to the inside of the liquid storage bin 7 through the reflux pipe 11 via the discharge pipe 9, and the liquid extraction component 13 includes a second bracket 14 and a counterweight 21, a second fluoroplastic centrifugal pump 15 is evenly fixedly installed on the top of the second bracket 14, and multiple sets of tests can be performed for comparison by setting up multiple second fluoroplastic centrifugal pumps 15. A drainage tube 16 is fixedly installed on the output end of the second fluoroplastic centrifugal pump 15, and an electromagnetic flowmeter 17 is fixedly installed on the drainage tube 16. The electromagnetic flowmeter 17 monitors the flow rate of the liquid inside the drainage tube 16 in real time. A PLC controller 20 is provided on the floor of the second bracket 14, and the PLC controller 20 is electrically connected to the second fluoroplastic centrifugal pump 15 and the electromagnetic flowmeter 17 through an internal control module. The power of the second fluoroplastic centrifugal pump 15 is controlled by the PLC controller 20 and the flow rate monitored by the electromagnetic flowmeter 17 is received, so as to realize automatic control of the flow rate of the liquid. The input end of the second fluoroplastic centrifugal pump 15 is fixedly installed with a delivery pipe 18, and the input end of the delivery pipe 18 is fixedly installed with a clamp 19. The top of the counterweight block 21 is evenly penetrated with a first plug hole 22, the bottom end of the counterweight block 21 is evenly fixedly connected with a support rod 23, the top of the counterweight block 21 is fixedly connected with a pull rod 24, and the two sides of the pull rod 24 are symmetrically fixedly connected with a hanging rod 25, and the top of the first bracket 3 is provided with three card slots 4.

[0027] See also Figure 6-Figure 8The liquid flow device 2 includes a drainage groove 26 and a fixing assembly 30. The drainage groove 26 is movably connected to the inner side of the card slot 4. The bottom end of the drainage groove 26 is provided with a sinking groove 32. The top of the drainage groove 26 is symmetrically fixed with a stopper 33. The fixing assembly 30 includes a supporting base 34 and a threaded rod 38. The middle of the top of the supporting base 34 is evenly fixed with a triangular support rod 35. The top of the triangular support rod 35 is provided with a metal plate 44. The top of the triangular support rod 35 is a pointed design to reduce the contact area with the metal plate 44 and reduce the contact area. The impact of the test, the top of the support base 34 is symmetrically fixedly connected with four support side rods 36, the inner tops of the four support side rods 36 are fixedly connected with a connecting bracket 37, one side of the top of the support base 34 is evenly fixedly connected with a blocking rod 42, the outer tops of the two support side rods 36 close to the blocking rod 42 are respectively fixedly connected with a positioning plate 43, the threaded rod 38 is threadedly connected to the middle of the connecting bracket 37, the middle of the bottom end of the threaded rod 38 is fixedly connected with a cross plug rod 39, and the outer side of the cross plug rod 39 is movably plugged with a spherical extrusion piece 4 0, a cross slot 41 is provided at the top of the spherical extrusion member 40, and the cross plug rod 39 is inserted into the inner side of the cross slot 41 with an interference fit. The top of the metal plate 44 is in contact with the bottom end of the spherical extrusion member 40, and the threaded rod 38 is screwed by external force to drive the spherical extrusion member 40 to move downward until the bottom end of the spherical extrusion member 40 is tightly attached to the top of the metal plate 44 to fix the metal plate 44 to prevent shaking caused by the impact of the solution. One end of the top of the drainage groove 26 is fixedly connected to the splash plate 28, and the top of the splash plate 28 is penetrated by a second plug hole 2 9. An arc-shaped guide groove 31 is provided at one end of the drainage groove 26 away from the splash plate 28. A clamping plate 27 is provided at one end of the bottom end of the drainage groove 26 close to the arc-shaped guide groove 31. The support base plate 34 is placed on the inner side of the sinking groove 32. At this time, the top of the support base plate 34 is lower than the inner bottom end of the drainage groove 26. The solution flows through the top of the support base plate 34 to prevent the solution from impacting the bottom end of the support base plate 34 and causing shaking. The positioning plate 43 is contacted and connected with the block 33, and the positioning plate 43 is blocked by the block 33 to prevent the fixing component 30 from shaking.

[0028] See also Figure 2 The delivery tube 18 is movably plugged into the inner side of the first plug hole 22, the top of the clamp 19 is in contact with the bottom end of the counterweight 21, the pull rod 24 is mounted on the top of the partition plate 6 through the hanging rod 25, and the counterweight 21 is replaced in the two liquid storage bins 7 by pulling the pull rod 24 by external force to realize the extraction of different solutions. The clamping plate 27 is engaged and connected to the top of the side wall of the second container 8, and the bottom end of the arc-shaped guide groove 31 is located inside the second container 8.

[0029] The second fluoroplastic centrifugal pump 15 extracts the pickling solution from the liquid storage bin 7 through the delivery pipe 18 and discharges it into the drainage trough 26 through the drainage pipe 16. The pickling solution flows to the second container 8 through the drainage trough 26. The first fluoroplastic centrifugal pump 10 extracts the pickling solution from the second container 8 through the discharge pipe 9 and delivers it to another liquid storage bin 7 through the reflux pipe 11 for storage.

[0030] See also Figure 2 In a second embodiment of the present invention, all second fluoroplastic centrifugal pumps 15 are set to the same power and control a uniform flow rate through a PLC controller 20. Then, the first second fluoroplastic centrifugal pump 15 is started to pump the pickling liquid in the liquid holding chamber 7 into the drainage groove 26 for a first round of testing. After the pickling solution flows through the metal plate 44, it flows into the second container 8 through the arc-shaped guide groove 31. Then, the first fluoroplastic centrifugal pump 10 is started to pump the pickling solution in the second container 8 back into another liquid holding chamber 7. When the pickling solution in the liquid holding chamber 7 is completely pumped out by the second fluoroplastic centrifugal pump 15, the second fluoroplastic centrifugal pump 15 is turned off. Then, the input end of the delivery pipe 18 is placed in the liquid holding chamber 7 containing the reflux pickling solution through the pull rod 24 and hung on the partition plate 6 through the hanging rod 25. When the pickling solution in the second container 8 is completely pumped out, the second second fluoroplastic centrifugal pump 15 is started for a second round of testing. Multiple rounds of testing are performed in sequence to test the changes in the effect of the pickling corrosion inhibitor after use.

[0031] See also Figure 3 The third embodiment provided by the present invention is: all the second fluoroplastic centrifugal pumps 15 are set to the same power to control a uniform flow rate through the PLC controller 20, or different flow rates are set in a step-by-step manner, and then all the second fluoroplastic centrifugal pumps 15 are started at the same time for testing, and then the first fluoroplastic centrifugal pump 10 is started to return the pickling solution inside the second container 8 to the liquid holding tank 7 where the delivery pipe 18 is placed to form a circulation, so as to perform multiple groups of continuous flow tests on the pickling corrosion inhibitor.

[0032] Working principle: During use, first set different numbers of liquid flow devices 2 according to the comparative data to be tested, then place the metal plate 44 on the top of the triangular support rod 35, and then use external force to twist the threaded rod 38 to move downward. The movement of the threaded rod 38 drives the spherical extrusion member 40 to move downward until the bottom end of the spherical extrusion member 40 is close to the top of the metal plate 44. At this time, the metal plate 44 is fixed, and then the fixing component 30 is placed inside the drainage groove 26 by external force, and the supporting bottom plate 34 is located inside the sinking groove 32, and the positioning plate 43 is close to the side of the stopper 33, and then controlled by PLC. The controller 20 is set to control the flow rate of the power of the second fluoroplastic centrifugal pump 15, and then the acidic solution mixed with the corrosion inhibitor is added to the liquid holding bin 7. Then, the delivery pipe 18 is inserted into the inside of the first plug hole 22, and the clamp 19 is installed at the end of the delivery pipe 18 away from the second fluoroplastic centrifugal pump 15. Then, the counterweight 21 is placed in the liquid holding bin 7 containing the solution through the pull rod 24, and the hanging rod 25 is hung on the top of the liquid holding bin 7. The end of the drainage pipe 16 away from the second fluoroplastic centrifugal pump 15 is inserted into the inner side of the second plug hole 29, and then the second fluoroplastic centrifugal pump 15 is started for testing;

[0033] After starting the second fluoroplastic centrifugal pump 15, the second fluoroplastic centrifugal pump 15 extracts the solution inside the liquid holding bin 7 through the delivery pipe 18 and discharges it into the interior of the drainage trough 26 through the drainage pipe 16. The solution flows to the second container 8 through the drainage trough 26. When the solution passes through the fixed component 30, the solution flows to the metal plate 44 through the top of the supporting bottom plate 34. The metal plate 44 is flushed by the flowing solution. The electromagnetic flowmeter 17 monitors the flow rate of the solution in the drainage pipe 16 in real time. When the flow rate decreases or exceeds the preset range, the PLC controller 20 receives a signal to control the second fluoroplastic centrifugal pump 15 to increase or decrease the power to maintain a uniform flow rate of the solution. The flow rates of different second fluoroplastic centrifugal pumps 15 are different. After the test is completed, the threaded rod 38 is pulled upward by external force to drive the fixed component 30 to disengage from the interior of the drainage trough 26. Then, the threaded rod 38 is rotated by external force to drive the spherical extrusion member 40 away from the metal plate 44 until the metal plate 44 falls off. Then, a comparison is made based on the corrosion conditions of multiple metal plates 44.

[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for testing the flow properties of a pickling corrosion inhibitor, comprising a liquid circulation device (1), a liquid flow device (2) and a first bracket (3), characterized in that: The liquid circulation device (1) includes a first container (5), a second container (8) and a liquid extraction assembly (13), wherein a partition plate (6) is fixedly connected to the middle portion of the interior of the first container (5), two liquid storage bins (7) are symmetrically provided inside the first container (5), a discharge pipe (9) is fixedly connected to the outer bottom end of the second container (8), and the liquid extraction assembly (13) includes a second bracket (14) and a counterweight (21), and a second fluoroplastic centrifugal pump (15) is evenly fixedly installed on the top end of the second bracket (14); The liquid flow device (2) comprises a drainage trough (26) and a fixing assembly (30), wherein a sinking trough (32) is provided at the inner bottom end of the drainage trough (26), a stopper (33) is symmetrically fixedly connected to the top end of the drainage trough (26), and the fixing assembly (30) comprises a supporting base plate (34) and a threaded rod (38), wherein a triangular supporting rod (35) is evenly fixedly connected to the middle of the top end of the supporting base plate (34), and four supporting side rods (36) are symmetrically fixedly connected to the top end of the supporting base plate (34). The inner top end of each supporting side rod (36) is fixedly connected to a connecting bracket (37), the threaded rod (38) is threadedly connected to the middle of the connecting bracket (37), the middle of the bottom end of the threaded rod (38) is fixedly connected to a cross plug rod (39), the outer side of the cross plug rod (39) is movably plugged with a spherical extrusion piece (40), the top end of the spherical extrusion piece (40) is provided with a cross slot (41), and the cross plug rod (39) is interference fit and plugged into the inner side of the cross slot (41).

2. A pickling corrosion inhibitor flowability testing device according to claim 1, characterized in that: The top of the first bracket (3) is provided with three card slots (4), the drainage groove (26) is movably connected to the inner side of the card slot (4), the outer side of the second container (8) is provided with a first fluoroplastic centrifugal pump (10), the end of the discharge pipe (9) away from the second container (8) is fixedly installed on the input end of the first fluoroplastic centrifugal pump (10), the output end of the first fluoroplastic centrifugal pump (10) is fixedly installed with a return pipe (11), the end of the return pipe (11) away from the first fluoroplastic centrifugal pump (10) is fixedly installed with a hanger (12), and the hanger (12) is movably plugged into the first container (5) is located at the top of the side wall, and one end of the return pipe (11) close to the hanger (12) is located inside the liquid storage bin (7), the counterweight block (21) is located inside the liquid storage bin (7), the output end of the second fluoroplastic centrifugal pump (15) is fixedly installed with a drainage pipe (16), the drainage pipe (16) is fixedly installed with an electromagnetic flowmeter (17), a PLC controller (20) is provided on the floor of the second bracket (14), the input end of the second fluoroplastic centrifugal pump (15) is fixedly installed with a delivery pipe (18), and the input end of the delivery pipe (18) is fixedly installed with a clamp (19).

3. A pickling corrosion inhibitor flowability testing device according to claim 1, characterized in that: One end of the top of the drainage groove (26) is fixedly connected to a splash plate (28), and a second plug hole (29) is opened through the top of the splash plate (28). An arc-shaped guide groove (31) is provided at one end of the drainage groove (26) away from the splash plate (28), and a clamping plate (27) is provided at one end of the bottom end of the drainage groove (26) close to the arc-shaped guide groove (31). A blocking rod (42) is evenly fixedly connected to one side of the top of the support base plate (34), and the outer top ends of the two support side rods (36) close to the blocking rod (42) are respectively fixedly connected to positioning plates (43). The support base plate (34) is placed on the inner side of the sinking groove (32), and the positioning plate (43) and the stop block (33) are in contact and connected.

4. A pickling corrosion inhibitor flowability testing device according to claim 2, characterized in that: The top of the counterweight block (21) is evenly penetrated with a first plug hole (22), the bottom of the counterweight block (21) is evenly fixedly connected with a support rod (23), the top of the counterweight block (21) is fixedly connected with a pull rod (24), and the two sides of the pull rod (24) are symmetrically fixedly connected with hanging rods (25).

5. A pickling corrosion inhibitor flowability testing device according to claim 4, characterized in that: The delivery pipe (18) is movably plugged into the inner side of the first plug hole (22), the top end of the clamp (19) is in contact with the bottom end of the counterweight (21), and the pull rod (24) is mounted on the top end of the partition plate (6) through the hanging rod (25).

6. A pickling corrosion inhibitor flowability testing device according to claim 3, characterized in that: The snap-on plate (27) is snap-connected to the top end of the side wall of the second container (8), and the bottom end of the arc-shaped guide groove (31) is located inside the second container (8).

7. The pickling corrosion inhibitor flowability testing device according to claim 1, characterized in that: A metal plate (44) is provided at the top end of the triangular support rod (35), and the top end of the metal plate (44) is in contact with and connected to the bottom end of the spherical extrusion member (40).

8. A pickling corrosion inhibitor flowability testing device according to claim 2, characterized in that: The PLC controller (20) is electrically connected to the second fluoroplastic centrifugal pump (15) and the electromagnetic flowmeter (17) respectively.

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