Test piece fixing device for corrosion inhibitor performance evaluation experiment

Abstract

According to the test piece fixing device for the corrosion inhibitor performance evaluation experiment, a channel communicated with a sleeve is formed in a supporting base of the device, a bearing rod can abut against the interior of a groove formed in a stirring rod after sequentially penetrating through the sleeve and the channel, a limiting hole matched with a limiting block is formed in the sleeve, a jacking assembly can jack a test piece on the sleeve, and therefore the test piece can be fixed on the stirring rod. Therefore, the test piece cannot be loosened due to vibration in the stirring process of the stirring rod.

Description

Technical Field

[0001] The utility model relates to the technical field of corrosion inhibitor performance evaluation experiments, and specifically relates to a specimen fixing device for corrosion inhibitor performance evaluation experiments. Background Art

[0002] In the petrochemical field, with the trend of inferior raw materials for processing, the corrosion protection of production devices has always been highly concerned. Among them, the corrosion problem of equipment is more prominent. Slowing down the corrosion problem in the device production process through scientific corrosion protection technology is of great significance for maintaining the long-term operation of the device, ensuring the economic benefits and market competitiveness of the enterprise.

[0003] In the prior art, in order to reduce the impact of equipment corrosion on the normal operation of the device, the method of adding corrosion inhibitors is usually used to slow down the corrosion rate. At present, there are various types of corrosion inhibitors on the market. To ensure the corrosion inhibition effect, it is necessary to carry out specimen corrosion experiments to evaluate the performance of corrosion inhibitors. In corrosion experiments containing volatile media, the open device will cause the corrosion medium to volatilize, and the change in the concentration of the corrosion medium makes it impossible to scientifically evaluate the performance of the corrosion inhibitor. Therefore, the specimens are generally placed in a sealed reaction kettle for operation. Under closed conditions, the hanging method of the specimens has a great influence on the experimental parallelism results. Currently, the specimens are mainly immersed in the corrosion medium for experiments by hanging them with hooks. However, during the experiment, the specimens swing with the agitation of the corrosion liquid, and their postures are not fixed, resulting in poor experimental parallelism. Furthermore, it will also cause trouble to the performance evaluation of the corrosion inhibitor. There are also some prior arts that use the cooperation of bolts and nuts to clamp the specimens, but due to the agitation of the stirring rod, the bolts will become loose under long-term vibration, resulting in the loosening of the specimens, and there is also the problem of unfixed specimen postures. Summary of the Utility Model

[0004] In order to solve the deficiencies in the prior art, the utility model provides a specimen fixing device for corrosion inhibitor performance evaluation experiments. A channel communicating with the sleeve is opened in the support seat of the device. After the bearing rod passes through the sleeve and the channel in sequence, it can abut against the groove opened on the stirring rod. A limiting hole cooperating with the limiting block is opened on the sleeve, and the tightening assembly can tightly press the specimen on the sleeve, so that the specimen will not become loose due to vibration during the stirring process of the stirring rod.

[0005] The technical solution adopted by the present utility model to solve the above technical problems is as follows: A specimen fixing device for corrosion inhibitor performance evaluation experiments, comprising a support seat slidably sleeved on the stirring rod of the corrosion inhibitor performance evaluation experimental equipment and a plurality of bearing rods for hanging specimens. A plurality of sleeves are fixedly connected to the support seat, and a channel communicating with the sleeves is provided in the support seat. The bearing rods can pass through the sleeves and the channels in sequence and then abut against the grooves provided on the stirring rod. An accommodation groove is provided on the bearing rod, and a limit block is telescopically arranged in the accommodation groove. A limit hole cooperating with the limit block is provided on the sleeve. A tightening assembly is arranged at one end of the bearing rod away from the groove. A hanging space for accommodating the specimen is formed between the tightening assembly and the sleeve, and the tightening assembly can tighten the specimen against the sleeve.

[0006] As a further optimization of the specimen fixing device for corrosion inhibitor performance evaluation experiments of the present utility model: The tightening assembly includes a fixing plate and a tightening spring. The fixing plate is arranged at one end of the bearing rod away from the groove. One end of the tightening spring is fixedly connected to the fixing plate, and the other end of the tightening spring and the sleeve form the hanging space, and the tightening spring can tighten the specimen against the sleeve.

[0007] As a further optimization of the specimen fixing device for corrosion inhibitor performance evaluation experiments of the present utility model: The bearing rod includes a first part and a second part, and the diameter of the first part is smaller than that of the second part. The diameter of the first part is equal to the inner diameter of the sleeve. The second part can pass through the through hole on the specimen, and the circumferential side wall of the second part is attached to the inner wall of the through hole. The fixing plate is arranged at one end of the second part away from the groove, and the tightening spring is sleeved on the second part.

[0008] As a further optimization of the specimen fixing device for corrosion inhibitor performance evaluation experiments of the present utility model: The fixing plate is a circular plate, the bearing rod is a circular rod, the fixing plate and the bearing rod are coaxially connected, and the diameter of the fixing plate is larger than that of the bearing rod.

[0009] As a further optimization of the specimen fixing device for corrosion inhibitor performance evaluation experiments of the present utility model: The materials of the support seat, sleeve, bearing rod, limit block and fixing plate are polytetrafluoroethylene.

[0010] As a further optimization of the specimen fixing device for corrosion inhibitor performance evaluation experiments of the present utility model: A limit rod is arranged on the outer wall of the sleeve, and the limit rod prevents the limit block from disengaging from the limit hole.

[0011] As a further optimization of the specimen fixing device for corrosion inhibitor performance evaluation experiments of the present utility model: A return spring is connected between the limit block and the bottom wall of the accommodation groove, and the return spring can push the limit block to extend out of the accommodation groove and enter the limit hole.

[0012] As a further optimization of a test piece fixing device for a corrosion inhibitor performance evaluation experiment of the present utility model: The support base, sleeve, bearing rod, limit block, return spring, and tightening assembly are made of Hastelloy.

[0013] As a further optimization of a test piece fixing device for a corrosion inhibitor performance evaluation experiment of the present utility model: The grooves are provided in multiple groups, and the multiple groups of grooves are evenly distributed along the axial direction of the stirring rod. The number of grooves in one group is multiple, and all the grooves in the same group are evenly distributed along the circumferential direction of the stirring rod.

[0014] As a further optimization of a test piece fixing device for a corrosion inhibitor performance evaluation experiment of the present utility model: A plurality of bolts and a plurality of screw holes are provided on the support base, and after the bolts pass through the screw holes, they can abut against the surface of the stirring rod.

[0015] Beneficial effects: A limit block is telescopically arranged in the receiving groove of the present utility model. A limit hole matching with the limit block is opened on the sleeve. A tightening assembly is arranged at one end of the bearing rod away from the groove. A suspension space for receiving the test piece is formed between the tightening assembly and the sleeve, and the tightening assembly can tighten the test piece on the sleeve. The limit block extends out of the limit hole, so that the bearing rod cannot fall off from the sleeve. At the same time, the tightening assembly tightens the test piece on the sleeve, so that during the rotation of the stirring rod, the test piece will not be affected by vibration and the fixing effect of the test piece will not be affected.

[0016] The tightening assembly includes a fixing plate and a tightening spring. The fixing plate is arranged at one end of the bearing rod away from the groove. One end of the tightening spring is fixedly connected to the fixing plate, and the other end of the tightening spring and the sleeve form the suspension space, and the tightening spring can tighten the test piece on the sleeve. The test piece is sleeved on the bearing rod. After the bearing rod and the sleeve are limited, the test piece will squeeze the tightening spring, and after the tightening spring is compressed, it will always tighten the test piece and tighten it on the sleeve.

[0017] The bearing rod can abut against the grooves opened on the stirring rod after passing through the sleeve and the channel in sequence. The grooves are provided in multiple groups, and the multiple groups of grooves are evenly distributed along the axial direction of the stirring rod. The number of grooves in one group is multiple, and all the grooves in the same group are evenly distributed along the circumferential direction of the stirring rod, so that the position of the support base on the stirring rod can be adjusted. Description of the Drawings

[0018] Figure 1 is a partial sectional view of the present utility model;

[0019] Figure 2 is a schematic diagram of the cooperation between the bearing rod and the tightening spring of the present utility model;

[0020] Figure 3 is a schematic diagram of the cooperation between the limit block and the receiving groove;

[0021] Figure 4 is a schematic structural view of the present utility model;

[0022] Reference numerals: 1, support base; 101, sleeve; 102, limiting rod; 2, bearing rod; 201, limiting block; 202, pressing spring; 203, fixing plate; 204, reset spring; 205, receiving groove; 206, second part; 207, first part; 3, stirring rod; 301, groove; 302, bolt; 4, test piece. Specific embodiments

[0023] The technical solution of the present utility model will be further elaborated in detail below in conjunction with specific embodiments. For parts that are not detailedly described and disclosed in the following embodiments of the present utility model, they should all be understood as the prior art known or should be known to those skilled in the art, such as the principle of the corrosion inhibitor performance evaluation experiment, the structure and model of the reaction kettle, the material, structure and model of the stirring rod 3, the material, structure and model of the test piece 4, etc.

[0024] Embodiment 1

[0025] A test piece fixing device for a corrosion inhibitor performance evaluation experiment, as Figure 1As shown in the figure, it includes a support base 1 slidably sleeved on a stirring rod 3 of an experimental device for evaluating the performance of corrosion inhibitors and a plurality of bearing rods 2 for hanging test pieces 4. The experimental device for evaluating the performance of corrosion inhibitors is a reaction kettle. A corrosion inhibitor is provided in the reaction kettle, and the liquid level height of the added corrosion inhibitor should be such that it submerges the fixed test piece 4, generally not exceeding 2 / 3 of the total volume of the reaction kettle. According to the needs of the simulated working conditions, an inert gas can also be filled into the reaction kettle. The corrosion inhibitor and the inert gas are prior arts in this field and will not be elaborated here. Four bearing rods 2 are provided, one on each of the front, back, left, and right sides. A plurality of sleeves 101 are fixedly connected to the support base 1. A channel communicating with the sleeves 101 is opened in the support base 1. After the bearing rod 2 sequentially passes through the sleeves 101 and the channel, it can abut against a groove 301 opened on the stirring rod 3. An accommodation groove 205 is opened on the bearing rod 2, and a limit block 201 is telescopically arranged in the accommodation groove 205. A limit hole cooperating with the limit block 201 is opened on the sleeve 101. The sleeve 101 is integrally connected with the support base 1. The operator first presses the limit block 201 into the accommodation groove 205, then passes the bearing rod 2 through a through hole on the test piece 4, and then passes the bearing rod 2 into the sleeve 101 until the limit block 201 extends out of the limit hole, thereby limiting the bearing rod 2 inside the sleeve 101. A tightening assembly is arranged at one end of the bearing rod 2 away from the groove 301. A hanging space for accommodating the test piece 4 is formed between the tightening assembly and the sleeve 101. The test piece 4 will squeeze the tightening assembly in the hanging space, and the tightening assembly can tightly press the test piece 4 against the sleeve 101, so that during the stirring process of the stirring rod 3, due to the cooperation between the limit block 201 and the limit hole and the tightening of the tightening assembly, the test piece 4 will not become loose due to the stirring of the stirring rod 3.

[0026] When the test piece 4 needs to be removed after the experiment, the operator presses the limit block 201 extending out of the limit hole so that it returns from the limit hole to the accommodation groove 205. At this time, the bearing rod 2 is pulled out of the sleeve 101, and the test piece 4 can be removed.

[0027] The above is the basic implementation mode of the present invention. Further improvements, optimizations, and limitations can be made on this basis to obtain the following embodiments:

[0028] Embodiment 2

[0029] This embodiment is an improved solution based on Embodiment 1. Its main structure is the same as that of Embodiment 1. The improvement lies in: as Figure 1As shown in the figure, the tightening assembly includes a fixing plate 203 and a tightening spring 202. The fixing plate 203 is arranged at one end of the bearing rod 2 away from the groove 301. One end of the tightening spring 202 is fixedly connected to the fixing plate 203. The length of the tightening spring 202 exceeds the distance between the fixing plate 203 and the sleeve 101 after the bearing rod 2 enters the sleeve 101, ensuring the tightening effect after the tightening spring 202 is compressed. A suspension space is formed between the other end of the tightening spring 202 and the sleeve 101. After the test piece 4 is sleeved on the bearing rod 2 and enters the suspension space, it will compress the tightening spring 202, causing the tightening spring 202 to deform under compression and generate a force for the tightening spring 202 to recover. Moreover, the tightening spring 202 can tightly hold the test piece 4 against the sleeve 101, ensuring that during the stirring process of the stirring rod 3, the tightening spring 202 can always tightly hold the test piece 4 against the sleeve 101.

[0030] Embodiment 3

[0031] This embodiment is an improved solution based on Embodiment 2. Its main structure is the same as that of Embodiment 2. The improvement lies in: As Figure 2 shown in the figure, the bearing rod 2 includes a first part 207 and a second part 206, and the diameter of the first part 207 is smaller than that of the second part 206. The diameter of the first part 207 is equal to the inner diameter of the sleeve 101. The first part 207 and the second part 206 are integrally connected, ensuring that the first part 207 can enter the inside of the sleeve 101, while the second part 206 cannot enter the inside of the sleeve 101. The second part 206 can pass through the through hole on the test piece 4, and the peripheral side wall of the second part 206 is in contact with the inner wall of the through hole, ensuring that when the test piece 4 is sleeved on the second part 206, the fixing effect of the test piece 4 will not be affected by the gap between the inner wall of the through hole and the peripheral side wall of the second part 206. The fixing plate 203 is arranged at one end of the second part 206 away from the groove 301, and the tightening spring 202 is sleeved on the second part 206.

[0032] Embodiment 4

[0033] This embodiment is an improved solution based on Embodiment 2. Its main structure is the same as that of Embodiment 2. The improvement lies in: As Figure 1 shown in the figure, the fixing plate 203 is a circular plate, the bearing rod 2 is a circular rod, the fixing plate 203 is coaxially connected to the bearing rod 2, and the diameter of the fixing plate 203 is larger than that of the bearing rod 2, enabling the fixing plate 203 to better ensure the tightening effect of the tightening spring 202.

[0034] Embodiment 5

[0035] This embodiment is an improved solution based on Embodiment 1. Its main structure is the same as that of Embodiment 1. The improvement lies in: As Figure 1As shown, the limiting block 201 enters the receiving groove 205 until it extends out of the limiting hole. A limiting rod 102 is provided on the outer wall of the sleeve 101, and the limiting rod 102 prevents the limiting block 201 from disengaging from the limiting hole. As Figure 3 shown, a return spring 204 is connected between the limiting block 201 and the bottom wall of the receiving groove 205. The return spring 204 can push the limiting block 201 to extend out of the receiving groove 205 and enter the limiting hole.

[0036] Embodiment 6

[0037] This embodiment is an improved solution based on Embodiment 1. Its main structure is the same as that of Embodiment 1. The improvement lies in: As Figure 1 shown, multiple groups of grooves 301 are provided. The multiple groups of grooves 301 are evenly distributed along the axial direction of the stirring rod 3. The number of grooves 301 in one group is multiple, and all the grooves 301 in the same group are evenly distributed along the circumferential direction of the stirring rod 3. In this way, the position of the support seat 1 on the stirring rod 3 can be adjusted, so that the distance between the support seat 1 and the bottom of the stirring rod 3 can be adjusted.

[0038] Embodiment 7

[0039] This embodiment is an improved solution based on Embodiment 1. Its main structure is the same as that of Embodiment 1. The improvement lies in: As Figure 4 shown, multiple bolts 302 and multiple screw holes are provided on the support seat 1. After the bolts 302 pass through the screw holes, they can abut against the surface of the stirring rod 3. After the support seat 1 reaches the appropriate position on the stirring rod 3, it is tightened against the stirring rod 3 by the bolts 302 to ensure the fixation of the position of the support seat 1.

[0040] It should be noted that the materials of the support seat 1, the sleeve 101, the bearing rod 2, the limiting block 201, the return spring 204 and the tightening assembly are Hastelloy. Among them, the support seat 1 and the sleeve 101 are integrally formed. An installation hole is opened at the bottom of the receiving groove 205 on the bearing rod 2. One end of the return spring 204 passes through the installation hole and then this end of the return spring 204 is bent and tightened to ensure that this end of the return spring 204 will not fall off from the installation hole. The same is true for one end of the tightening spring 202 in the tightening assembly close to the fixed plate 203, that is, an installation hole is opened on the fixed plate 203, one end of the tightening spring 202 passes through the installation hole and then this end of the tightening spring 202 is bent and tightened to ensure that this end of the tightening spring 202 will not fall off from the installation hole on the fixed plate 203.

[0041] The materials of the support base 1, the sleeve 101, the bearing rod 2, the limiting block 201 and the fixing plate 203 can also be selected as polytetrafluoroethylene, while the return spring 204 and the pressing spring 202 are made of Hastelloy. The installation method is still to drill installation holes in the receiving groove 205 and the fixing plate 203. The specific steps are the same as those described above and will not be elaborated here.

[0042] Both Hastelloy and polytetrafluoroethylene are existing technologies in this field and will not be elaborated here.

[0043] The application scenarios of the present utility model are as follows:

[0044] Application scenario 1:

[0045] In the coupon experiment of the corrosion inhibitor performance evaluation experiment of the present utility model, the mass of the standard coupon 4 is weighed before the experiment to facilitate the comparison of the weight loss of the coupon 4 after the experiment. The parameters required for the experiment are: reaction time 6h, reaction temperature 90°C, and stirring rate 100rpm.

[0046] Application scenario 2:

[0047] In the coupon experiment of the corrosion inhibitor performance evaluation experiment of the present utility model, the mass of the standard coupon 4 is weighed before the experiment to facilitate the comparison of the weight loss of the coupon 4 after the experiment. The parameters required for the experiment are: reaction time 6h, reaction temperature 90°C, and stirring rate 200rpm.

[0048] Application scenario 3:

[0049] In the coupon experiment of the corrosion inhibitor performance evaluation experiment of the present utility model, the mass of the standard coupon 4 is weighed before the experiment to facilitate the comparison of the weight loss of the coupon 4 after the experiment. The parameters required for the experiment are: reaction time 6h, reaction temperature 100°C, and stirring rate 200rpm.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test piece fixing device for a corrosion inhibitor performance evaluation experiment, comprising a support seat (1) slidably mounted on a stirring rod (3) of a corrosion inhibitor performance evaluation experimental device and a plurality of bearing rods (2) for hanging test pieces (4), characterized in that: A plurality of sleeves (101) are fixedly connected to the support seat (1), a channel communicating with the sleeves (101) is provided in the support seat (1), and the bearing rod (2) can be abutted against a groove (301) provided on the stirring rod (3) after passing through the sleeves (101) and the channel in sequence, a receiving groove (205) is provided on the bearing rod (2), a limit block (201) is telescopically provided in the receiving groove (205), a limit hole cooperating with the limit block (201) is provided on the sleeve (101), a tightening assembly is provided at one end of the bearing rod (2) away from the groove (301), a hanging space for accommodating a test piece (4) is formed between the tightening assembly and the sleeve (101), and the tightening assembly can tighten the test piece (4) on the sleeve (101).

2. The test piece fixing device for corrosion inhibitor performance evaluation experiment according to claim 1, characterized in that: The tightening assembly comprises a fixing plate (203) and a tightening spring (202); the fixing plate (203) is arranged at one end of the bearing rod (2) away from the groove (301); one end of the tightening spring (202) is fixedly connected to the fixing plate (203); the other end of the tightening spring (202) and the sleeve (101) form the suspension space; and the tightening spring (202) can tighten the test piece (4) onto the sleeve (101).

3. The test piece fixing device for corrosion inhibitor performance evaluation experiment according to claim 2, characterized in that: The bearing rod (2) comprises a first part (207) and a second part (206), and the diameter of the first part (207) is smaller than the diameter of the second part (206), and the diameter of the first part (207) is equal to the inner diameter of the sleeve (101); the second part (206) can be inserted into the through hole on the test piece (4), and the peripheral side wall of the second part (206) is in contact with the inner wall of the through hole; the fixing plate (203) is arranged at one end of the second part (206) away from the groove (301), and the tensioning spring (202) is sleeved on the second part (206).

4. The test piece fixing device for corrosion inhibitor performance evaluation experiment according to claim 2, characterized in that: The fixing plate (203) is a circular plate, the bearing rod (2) is a circular rod, the fixing plate (203) and the bearing rod (2) are coaxially connected, and the diameter of the fixing plate (203) is greater than the diameter of the bearing rod (2).

5. The test piece fixing device for corrosion inhibitor performance evaluation experiment according to claim 2, characterized in that: The support seat (1), sleeve (101), bearing rod (2), limit block (201) and fixing plate (203) are made of polytetrafluoroethylene.

6. The test piece fixing device for corrosion inhibitor performance evaluation experiment according to claim 1, characterized in that: The outer wall of the sleeve (101) is provided with a limiting rod (102), and the limiting rod (102) prevents the limiting block (201) from falling out of the limiting hole.

7. The test piece fixing device for corrosion inhibitor performance evaluation experiment according to claim 1, characterized in that: A return spring (204) is connected between the limit block (201) and the bottom wall of the receiving groove (205), and the return spring (204) can push the limit block (201) to extend out of the receiving groove (205) and enter the limit hole.

8. The test piece fixing device for corrosion inhibitor performance evaluation experiment according to claim 7, characterized in that: The support seat (1), sleeve (101), bearing rod (2), limit block (201), return spring (204) and tightening assembly are made of Hastelloy.

9. The test piece fixing device for corrosion inhibitor performance evaluation experiment according to claim 1, characterized in that: The grooves (301) are arranged in a plurality of groups, the plurality of groups of grooves (301) are evenly distributed along the axial direction of the stirring rod (3), the number of grooves (301) in a group is multiple, and all the grooves (301) in the same group are evenly distributed along the circumferential direction of the stirring rod (3).

10. The test piece fixing device for corrosion inhibitor performance evaluation experiment according to claim 1, characterized in that: The support seat (1) is provided with a plurality of bolts (302) and a plurality of screw holes, and the bolts (302) can abut against the surface of the stirring rod (3) after passing through the screw holes.

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