Corrosion resistance testing device for MVR evaporators used in wastewater treatment

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By introducing a stress-affected component into the corrosion resistance testing device for MVR evaporators used in wastewater treatment, the stress during welding and expansion processes is simulated, solving the problem of stress influence not being considered in existing technologies and achieving more accurate corrosion resistance testing.

CN224581354UActive Publication Date: 2026-07-31SUZHOU DINGCHANG ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: SUZHOU DINGCHANG ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH CO LTD
Filing Date: 2025-08-11
Publication Date: 2026-07-31

AI Technical Summary

Technical Problem

Existing corrosion resistance testing devices for MVR evaporators used in wastewater treatment fail to effectively account for the residual stress experienced by heat exchange tubes during welding and expansion, resulting in corrosion test results that underestimate the actual risks.

Method used

A testing device was designed, comprising a receiving base, an evaporator sample tube, a medium inlet pipe, a first clamping plate, a second clamping plate, and a hydraulic rod. The hydraulic rod applies stress to simulate the residual stress during welding and expansion jointing processes, ensuring that the testing environment is consistent with the actual use environment.

Benefits of technology

This improves the authenticity and effectiveness of corrosion resistance testing, ensures the accuracy of test results, and avoids underestimating corrosion risks due to neglecting the influence of stress.

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Abstract

This utility model discloses a corrosion resistance testing device for an MVR evaporator used in wastewater treatment, including a stress-affecting component. The stress-affecting component comprises a first clamping plate, a second clamping plate, and a hydraulic rod. The first and second clamping plates are movably connected to a receiving seat. An evaporator sample tube is clamped between the first and second clamping plates. One end of the hydraulic rod is fixedly connected to the first and second clamping plates, and the other end of the hydraulic rod is movably connected to both the first and second clamping plates. This utility model can generate a force on the evaporator sample tube, thereby simulating the residual stress that the evaporator sample tube would experience during welding and expansion (the process of connecting to the tube sheet), thus ensuring that the test environment is consistent with the actual use environment and guaranteeing the authenticity and validity of the corrosion resistance test results.

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Description

Technical Field

[0001] This utility model relates to the field of corrosion resistance testing technology, specifically a corrosion resistance testing device for MVR evaporators used in wastewater treatment. Background Technology

[0002] The corrosion resistance testing device for MVR (Mechanical Vapor Recompression) evaporators used in wastewater treatment is a specialized device for simulating and evaluating the corrosion resistance of the core components (heat exchange tubes) of MVR evaporators when treating corrosive wastewater containing high salt, high COD, acids, alkalis, or heavy metals.

[0003] Existing testing devices typically only clamp the heat exchange tubes and introduce the medium for testing, without considering the residual stress that may occur during the welding and expansion (the process of connecting the heat exchange tubes to the tube sheet). Stress can accelerate the corrosion process. If no stress is applied during testing, and only corrosion under stress-free conditions is tested, the actual risk will be underestimated. Therefore, a new structure is needed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a corrosion resistance testing device for MVR evaporators used in wastewater treatment, thereby solving the problems mentioned in the background section. To solve the above-mentioned technical problems, this invention is achieved through the following technical solution: This utility model is a corrosion resistance testing device for MVR evaporators used in wastewater treatment, comprising: The assembly includes a receiving base, an evaporator sample tube, and a medium inlet pipe. The evaporator sample tube is mounted on the receiving base, and the medium inlet pipe is fixedly installed on the receiving base. The outlet end of the medium inlet pipe is connected to the inlet end of the evaporator sample tube. A stress-affecting component includes a first clamping plate, a second clamping plate, and a hydraulic rod. The first clamping plate and the second clamping plate are movably connected to the receiving seat. An evaporator sample tube is clamped between the first clamping plate and the second clamping plate. One end of the hydraulic rod is fixedly connected to the first clamping plate and the second clamping plate, and the other end of the hydraulic rod is movably connected to both the first clamping plate and the second clamping plate.

[0005] Furthermore, there are two of each of the first and second clamping plates.

[0006] Furthermore, both the first clamping plate and the second clamping plate have arc-shaped groove structures on their inner sides.

[0007] Furthermore, the stress-affecting component also includes a U-shaped rod, a screw rod, and a circular groove. The U-shaped rod is fixedly connected to the first clamping plate, and the screw rod is fixedly connected to the side of the U-shaped rod. A circular groove is formed through the second clamping plate, and the screw rod is movably connected in the circular groove.

[0008] Furthermore, the stress-affecting component also includes a nut, which is movably connected to the screw rod.

[0009] Furthermore, the stress-affecting component also includes a guide rod and a guide groove. The guide rod is fixedly connected to both ends of the inner side of the first clamping plate, and the guide groove is formed at both ends of the inner side of the second clamping plate, in which the guide rod is movably connected.

[0010] Furthermore, it also includes a convenient carrying component, which includes a card block, a card slot, a locking groove, and a locking rod. The card block is fixedly connected to the hydraulic rod. Card slots are opened through the first clamping plate and the second clamping plate. The card block is movably connected in the card slot. The locking groove is opened through the card block. The locking rod is movably inserted between the locking grooves. The card block is located at the front end of the receiving seat.

[0011] Furthermore, the portable assembly also includes a rectangular plate, a receiving groove, and a receiving rod. The rectangular plate is fixedly connected to the sides of both the first clamping plate and the second clamping plate. The receiving groove is opened through the rectangular plate. The receiving rod is fixedly connected to both ends of the receiving seat. The receiving rod is movably connected in the receiving groove.

[0012] This utility model has the following beneficial effects: In this invention, the upper and lower ends of the evaporator sample tube are clamped and connected by a first clamping plate and a second clamping plate, and the corresponding first clamping plate and second clamping plate are connected by a hydraulic rod. By controlling the hydraulic rod, a force can be generated on the evaporator sample tube under the action of the corresponding first clamping plate and second clamping plate, thereby simulating the residual stress that the evaporator sample tube will be subjected to during welding and expansion (the process of connecting with the tube sheet), thus ensuring that the test environment is consistent with the actual use environment and guaranteeing the authenticity and validity of the corrosion resistance test results. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a schematic diagram of the front view of this utility model; Figure 3 This is a schematic diagram of the hydraulic rod connection of this utility model; Figure 4 This is a schematic diagram showing the connection between the first clamping plate and the second clamping plate of this utility model; Figure 5 This is a schematic diagram of the card block connection of this utility model; Figure 6 This is a schematic diagram of the connection of the receiving rod of this utility model.

[0015] The attached diagram lists the components represented by each number as follows: 101. Receiver; 102. Evaporator sample tube; 103. Medium inlet pipe; 201. First clamping plate; 202. Second clamping plate; 203. Hydraulic rod; 204. U-shaped rod; 205. Screw rod; 206. Circular groove; 207. Nut; 208. Guide rod; 209. Guide groove; 301. Locking block; 302. Locking groove; 303. Locking groove; 304. Locking rod; 305. Rectangular plate; 306. Receiving groove; 307. Receiving rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0018] Please see Figure 1-6 As shown, this utility model is a corrosion resistance testing device for MVR evaporators used in wastewater treatment, comprising: The receiver 101, the evaporator sample tube 102, and the medium inlet pipe 103 are provided. The evaporator sample tube 102 is provided on the receiver 101, and the medium inlet pipe 103 is fixedly installed on the receiver 101. The outlet end of the medium inlet pipe 103 is connected to the inlet end of the evaporator sample tube 102. The stress-affecting component includes a first clamping plate 201, a second clamping plate 202, and a hydraulic rod 203. The first clamping plate 201 and the second clamping plate 202 are movably connected to the receiving seat 101. The evaporator sample tube 102 is clamped between the first clamping plate 201 and the second clamping plate 202. One end of the hydraulic rod 203 is fixedly connected to the first clamping plate 201 and the second clamping plate 202, and the other end of the hydraulic rod 203 is movably connected to both the first clamping plate 201 and the second clamping plate 202. There are two first clamping plates 201 and two second clamping plates 202. The mounting base 101 ensures the installation of the medium inlet pipe 103, which is used to introduce a test liquid with the same characteristics as sewage. The evaporator sample tube 102 has the same characteristics as the heat exchange tube in the MVR evaporator. The first clamping plate 201 and the second clamping plate 202 cooperate to clamp and fix the evaporator sample tube 102, and at the same time ensure the installation of the hydraulic rod 203. The hydraulic rod 203 ensures the generation of stress.

[0019] Both the first clamping plate 201 and the second clamping plate 202 have arc-shaped groove structures on their inner sides; The arc-shaped grooves of the aforementioned components ensure that the first clamping plate 201 and the second clamping plate 202 fit against the wall of the evaporator sample tube 102, thereby ensuring the stability of the clamping connection.

[0020] The stress-affecting component also includes a U-shaped rod 204, a screw rod 205, and a circular groove 206. The U-shaped rod 204 is fixedly connected to the first clamping plate 201, and the screw rod 205 is fixedly connected to the side of the U-shaped rod 204. The circular groove 206 is formed through the second clamping plate 202, and the screw rod 205 is movably connected in the circular groove 206. The stress-affecting component also includes a nut 207, and the nut 207 is movably connected to the screw rod 205. The U-shaped rod 204 ensures the installation of the screw rod 205, the circular groove 206 ensures the movement and insertion of the screw rod 205, and the nut 207 works in conjunction with the screw rod 205 to ensure the fastening and locking between the first clamping plate 201 and the second clamping plate 202.

[0021] The stress-affecting component also includes a guide rod 208 and a guide groove 209. The guide rod 208 is fixedly connected to both ends of the inner side of the first clamping plate 201, and the guide groove 209 is opened at both ends of the inner side of the second clamping plate 202. The guide rod 208 is movably connected in the guide groove 209. The guide rod 208 and the guide groove 209 work together to enable the first clamping plate 201 and the second clamping plate 202 to move smoothly together.

[0022] Working principle: First, the screw rod 205 fixedly connected to the upper and lower U-shaped rods 204 is inserted into the circular groove 206. At this time, the guide rod 208 moves along the guide groove 209. After the first clamping plate 201 and the second clamping plate 202 at the upper and lower ends clamp the evaporator sample tube 102, the nut 207 is tightened on the screw rod 205. Then, the hydraulic rod 203 is opened to apply force between the two first clamping plates 201 and the two second clamping plates 202, thereby generating stress on the evaporator sample tube 102. Then, the test liquid with the same characteristics as sewage is flushed into the inner wall of the evaporator sample tube 102 through the medium inlet pipe 103. After a period of time, the inner wall of the evaporator sample tube 102 is tested using a corrosion detector. This step can ensure that the test environment is consistent with the actual use environment, and ensure the authenticity and validity of the corrosion resistance test results.

[0023] Please see Figure 1-6 As shown, this embodiment, based on the above embodiment, further includes: The convenient carrying component includes a locking block 301, a locking groove 302, a locking groove 303, and a locking rod 304. The locking block 301 is fixedly connected to the hydraulic rod 203. The locking groove 302 is opened through the first clamping plate 201 and the second clamping plate 202. The locking block 301 is movably connected in the locking groove 302. The locking groove 303 is opened through the locking block 301. The locking rod 304 is movably inserted between the locking grooves 303. The locking block 301 is located at the front end of the receiving seat 101. The locking block 301 and the locking groove 302 work together to ensure the initial movable connection of the hydraulic rod 203 to the first clamping plate 201 and the second clamping plate 202. The locking groove 303 and the locking rod 304 work together to ensure the stable connection of the first clamping plate 201 and the second clamping plate 202 under force, and at the same time, to ensure the quick assembly and disassembly of the first clamping plate 201 and the second clamping plate 202 and the hydraulic rod 203.

[0024] The portable component also includes a rectangular plate 305, a receiving groove 306, and a receiving rod 307. The rectangular plate 305 is fixedly connected to the sides of the first clamping plate 201 and the second clamping plate 202. The receiving groove 306 is opened through the rectangular plate 305. The receiving rod 307 is fixedly connected to both ends of the receiving seat 101. The receiving rod 307 is movably connected in the receiving groove 306. The rectangular plate 305 provides a guarantee for the opening of the receiving groove 306. The receiving groove 306 and the receiving rod 307 work together to ensure quick assembly and disassembly between the bottom first clamping plate 201 and the second clamping plate 202 and the receiving seat 101.

[0025] Working principle: When the device needs to be transported, firstly, the locking rod 304 is removed from the locking groove 303, then the hydraulic rod 203 is closed, causing the locking block 301 to move downwards and disengage from the locking groove 302. Then, the bottom first clamping plate 201 and the second clamping plate 202 are moved upwards. At this time, the receiving rod 307 disengages from the receiving groove 306. Then, the nut 207 is removed from the screw rod 205. This step enables quick disassembly between the components, thereby improving the convenience of transportation. At the same time, it is convenient to replace the corresponding components individually when they are damaged, thus saving maintenance costs.

[0026] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A corrosion resistance testing device for MVR evaporator for wastewater treatment, characterized by, include: The container includes a receiving base (101), an evaporator sample tube (102), and a medium inlet pipe (103). The receiving base (101) is provided with an evaporator sample tube (102), and the medium inlet pipe (103) is fixedly installed on the receiving base (101). The outlet end of the medium inlet pipe (103) is connected to the inlet end of the evaporator sample tube (102). The stress-affecting component includes a first clamping plate (201), a second clamping plate (202), and a hydraulic rod (203). The first clamping plate (201) and the second clamping plate (202) are movably connected to the receiving seat (101). An evaporator sample tube (102) is clamped between the first clamping plate (201) and the second clamping plate (202). One end of the hydraulic rod (203) is fixedly connected to the first clamping plate (201) and the second clamping plate (202). The other end of the hydraulic rod (203) is movably connected to both the first clamping plate (201) and the second clamping plate (202).

2. The corrosion resistance testing device for an MVR evaporator for wastewater treatment according to claim 1, characterized in that: There are two clamping plates (201) and two clamping plates (202).

3. The corrosion resistance testing device for MVR evaporator for sewage treatment according to claim 1, characterized in that: Both the first clamping plate (201) and the second clamping plate (202) have arc-shaped groove structures on their inner sides.

4. The corrosion resistance testing device for MVR evaporator for sewage treatment according to claim 1, characterized in that: The stress-affecting component also includes a U-shaped rod (204), a screw rod (205), and a circular groove (206). The U-shaped rod (204) is fixedly connected to the first clamping plate (201), and the screw rod (205) is fixedly connected to the side of the U-shaped rod (204). The circular groove (206) is opened through the second clamping plate (202), and the screw rod (205) is movably connected in the circular groove (206).

5. The corrosion resistance testing device for MVR evaporator for sewage treatment according to claim 4, characterized in that: The stress-affecting component also includes a nut (207), which is movably connected to the screw rod (205).

6. The corrosion resistance testing device for MVR evaporator for sewage treatment according to claim 1, characterized in that: The stress-affecting component also includes a guide rod (208) and a guide groove (209). The guide rod (208) is fixedly connected to both ends of the inner side of the first clamping plate (201), and the guide groove (209) is opened at both ends of the inner side of the second clamping plate (202). The guide rod (208) is movably connected in the guide groove (209).

7. The corrosion resistance testing device for MVR evaporator for sewage treatment according to claim 1, characterized in that: It also includes a convenient carrying component, which includes a locking block (301), a locking slot (302), a locking groove (303), and a locking rod (304). The locking block (301) is fixedly connected to the hydraulic rod (203). The locking slot (302) is opened through the first clamping plate (201) and the second clamping plate (202). The locking block (301) is movably connected in the locking slot (302). The locking groove (303) is opened through the locking block (301). The locking rod (304) is movably inserted between the locking grooves (303). The locking block (301) is located at the front end of the receiving seat (101).

8. The corrosion resistance testing device for MVR evaporator for sewage treatment according to claim 7, characterized in that: The portable component also includes a rectangular plate (305), a receiving groove (306), and a receiving rod (307). The rectangular plate (305) is fixedly connected to the sides of the first clamping plate (201) and the second clamping plate (202). The receiving groove (306) is opened through the rectangular plate (305). The receiving rod (307) is fixedly connected to both ends of the receiving seat (101). The receiving rod (307) is movably connected in the receiving groove (306).