On-site electrochemical testing device for large pipeline material of power plant

Abstract

The utility model discloses a power plant large pipeline material on-site electrochemical testing device, which relates to the technical field of metal material electrochemistry and comprises a bottom plate, a detection component is arranged above the bottom plate, a U seat is arranged at the top of the bottom plate and positioned below the detection component, and a driving component for lifting the detection component is assembled at the top end of the U seat; the detection assembly comprises a liquid storage frame, an auxiliary electrode extending to the top of the liquid storage frame is assembled in the liquid storage frame, and a reference electrode extending to the top of the liquid storage frame is arranged on one side of the auxiliary electrode. Through the arrangement of the bent pipe, the horn head can rotate in multiple directions and is in contact with the outer walls of various pipelines in a power plant for electrochemical testing, so that the test on the pipeline material of the power plant is more comprehensive, and the electrolyte flowing down from the outer wall of the pipeline can be collected by the U-shaped seat and can be continuously used after being treated; meanwhile, the situation that the water drops on the ground to pollute the environment in a power plant is avoided.

Description

Technical Field

[0001] This utility model relates to the field of electrochemical technology of metallic materials, specifically to an on-site electrochemical testing device for large pipeline materials in power plants. Background Technology

[0002] Some key components of coal-fired power plants operate under high temperature and high pressure conditions for extended periods, making creep damage and aging one of their typical failure modes. Currently, relevant aging assessment standards (DL / T438-2016) have been established for low-alloy steel used in coal-fired power plants, allowing for the determination of creep damage levels through on-site metallographic coating methods, providing an important tool for metal monitoring. However, in supercritical and ultra-supercritical coal-fired power plants, high-chromium martensitic heat-resistant steels (P91, P92, P122, etc.) are almost universally used in the main steam and reheat steam hot section pipelines. The aging behavior of martensitic heat-resistant steels differs significantly from that of low-alloy steels, and existing creep aging assessment guidelines are not entirely applicable to martensitic heat-resistant steels. New on-site aging assessment technologies urgently need to be developed.

[0003] Patent document CN 215005102 U discloses an on-site electrochemical testing device for large pipeline materials in power plants. By setting up a screw adjustment mechanism and a pipeline bottom fixing component, the testing tank can be fixed to the pipeline, which facilitates operation and avoids problems such as tipping over during the electrochemical testing of the pipeline. When conducting electrochemical testing on the pipeline, the pipeline bottom fixing component is placed below the pipeline to be tested, and the screw motor is started. The output shaft of the screw motor drives the screw to rotate, and the screw lowers the testing tank to the upper surface of the pipeline through the moving seat. Electrolyte is then injected through the liquid inlet, and the electrochemical testing of the pipeline begins.

[0004] However, the above technical solution has certain shortcomings. Since the liquid outlet pipe and the detection tank are fixedly set, it can only detect metal pipes lying in the regulating seat. Moreover, since the appearance of power plant pipes is diverse, the metal pipe styles that the detection tank can detect are relatively limited, resulting in situations where the detection of power plant pipe materials cannot be performed. Therefore, an on-site electrochemical testing device for large power plant pipe materials is proposed. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide an on-site electrochemical testing device for large pipeline materials in power plants, so as to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an on-site electrochemical testing device for large pipeline materials in power plants, comprising a base plate, a detection component above the base plate, a U-shaped seat below the detection component on the top of the base plate, and a drive component for lifting and lowering the detection component mounted on the top of the U-shaped seat.

[0007] The detection assembly includes a liquid storage frame, an auxiliary electrode extending to the top of the liquid storage frame is installed inside the liquid storage frame, a reference electrode extending to the top of the liquid storage frame is provided on one side of the auxiliary electrode, a working electrode is provided on the side of the reference electrode away from the auxiliary electrode, and the top of the working electrode extends beyond the top of the liquid storage frame, a guide funnel extending into the liquid storage frame is provided at the top of the liquid storage frame, and the guide funnel is located between the auxiliary electrode and the reference electrode, a bent tube is connected to the bottom of the liquid storage frame, a constraint sleeve connected to the bottom of the liquid storage frame is fitted on the outer wall of the bent tube, a handle valve is installed at the end of the bent tube, and a horn head is connected to the bottom of the handle valve;

[0008] The bent tube includes a base tube fixed to the bottom of the liquid storage frame, a first inclined tube rotatably connected to the bottom of the base tube, a second inclined tube rotatably provided at the bottom of the first inclined tube, a third inclined tube rotatably connected to the bottom of the second inclined tube, and a bottom tube rotatably provided at the bottom end of the third inclined tube to connect with the handle valve.

[0009] As a preferred technical solution, the driving assembly includes a lead screw rotatably mounted on the top of the base plate, an active plate threaded onto the outer wall of the lead screw, a crossbeam fixed to the end face of the active plate, a sliding sleeve slidably mounted on the outer side of the crossbeam, a constraint frame for fixing the liquid storage frame on the front surface of the sliding sleeve, and a bolt rotatably mounted on the front surface of the constraint frame to abut against the liquid storage frame.

[0010] As a preferred technical solution, a top plate is installed on the top of the lead screw, and a drive motor for driving the lead screw to rotate is installed on the top of the top plate. An auxiliary rod fixed to the bottom plate and the top plate is provided on one side of the lead screw, and the active plate is sleeved on the outer wall of the auxiliary rod and the two are slidably connected.

[0011] As a preferred technical solution, the bottom of the U-shaped base is provided with a storage groove, and the inner wall of the U-shaped base is provided with multiple sets of grooves that communicate with the storage groove at equal intervals. A liquid collection frame is slidably provided in the storage groove.

[0012] As a preferred technical solution, the horn head is made of horn-shaped rubber material, and a filter screen with a central protrusion is fixed inside the horn head.

[0013] As a preferred technical solution, the top of the constraint sleeve and the bottom of the liquid storage frame are fixed by a threaded connection.

[0014] In summary, the present invention has the following main advantages:

[0015] This invention, through the design of the bent tube, allows the horn head to rotate in multiple directions, enabling it to contact the outer walls of various types of pipes within the power plant for electrochemical testing. This allows for a more comprehensive testing of the power plant's pipe materials. The U-shaped base can collect the electrolyte flowing down from the outer wall of the pipe, which can be treated and reused, while preventing it from dripping onto the ground and polluting the power plant's environment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is an unfolded view of the U-shaped base of this utility model;

[0018] Figure 3 This is a schematic diagram of the detection component structure of this utility model;

[0019] Figure 4 This is a cross-sectional view of the detection component of this utility model;

[0020] Figure 5 This is a schematic diagram of the bent tube structure of this utility model.

[0021] In the diagram: 100, base plate;

[0022] 110. U-shaped seat; 111. Groove; 112. Storage trough; 113. Liquid collection frame; 120. Lead screw; 121. Active plate; 122. Crossbeam; 123. Sliding sleeve; 124. Constraint frame; 130. Auxiliary rod; 131. Top plate; 140. Drive motor; 150. Detection component; 151. Liquid storage frame; 152. Auxiliary electrode; 153. Reference electrode; 154. Working electrode; 155. Guide hopper; 156. Bending tube; 1561. Base tube; 1562. First inclined tube; 1563. Second inclined tube; 1564. Third inclined tube; 1565. Bottom tube; 157. Constraint sleeve; 158. Handle valve; 159. Horn head. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The embodiments of this utility model will be described below based on its overall structure.

[0025] An on-site electrochemical testing device for large pipeline materials in power plants, such as Figures 1 to 5As shown, it includes a base plate 100, a detection component 150 is provided above the base plate 100, a U-shaped seat 110 is provided at the top of the base plate 100 below the detection component 150, and a drive component for lifting and lowering the detection component 150 is mounted at the top of the U-shaped seat 110.

[0026] The detection assembly 150 includes a liquid storage frame 151, an auxiliary electrode 152 extending to the top of the liquid storage frame 151 is installed inside the liquid storage frame 151, a reference electrode 153 extending to the top of the liquid storage frame 151 is provided on one side of the auxiliary electrode 152, a working electrode 154 is provided on the side of the reference electrode 153 away from the auxiliary electrode 152, and the top of the working electrode 154 extends beyond the top of the liquid storage frame 151. A guide bucket 155 extending into the liquid storage frame 151 is provided at the top of the liquid storage frame 151, and the guide bucket 155 is located between the auxiliary electrode 152 and the reference electrode 153. A bent tube 156 is connected to the bottom of the liquid storage frame 151. A constraint sleeve 157 connected to the bottom of the liquid storage frame 151 is fitted on the outer wall of the bent tube 156. A handle valve 158 is installed at the end of the bent tube 156, and a horn head 159 is connected to the bottom of the handle valve 158.

[0027] The bent tube 156 includes a base tube 1561 fixed to the bottom of the liquid storage frame 151. The bottom of the base tube 1561 is rotatably connected to a first inclined tube 1562. The bottom of the first inclined tube 1562 is rotatably provided with a second inclined tube 1563. The bottom of the second inclined tube 1563 is rotatably connected to a third inclined tube 1564. The bottom end of the third inclined tube 1564 is rotatably provided with a bottom tube 1565 that is connected to the handle valve 158.

[0028] The drive assembly includes a lead screw 120 rotatably mounted on the top of the base plate 100. An active plate 121 is threaded onto the outer wall of the lead screw 120. A crossbeam 122 is fixed to the end face of the active plate 121. A sliding sleeve 123 is slidably mounted on the outside of the crossbeam 122. A constraint frame 124 for fixing a liquid storage frame 151 is provided on the front surface of the sliding sleeve 123. A bolt that abuts against the liquid storage frame 151 is rotatably mounted on the front surface of the constraint frame 124.

[0029] A top plate 131 is installed on the top of the lead screw 120, and a drive motor 140 for driving the lead screw 120 to rotate is installed on the top of the top plate 131. An auxiliary rod 130 is provided on one side of the lead screw 120 and fixed to the bottom plate 100 and the top plate 131. The active plate 121 is sleeved on the outer wall of the auxiliary rod 130 and the two are slidably connected.

[0030] The output of the drive motor 140 drives the lead screw 120 to rotate. Under the constraint of the auxiliary rod 130, the active plate 121 and the crossbeam 122 are lowered synchronously, causing the detection component 150 to lower and approach the tube in the U-shaped seat 110 until the horn head 159 is fully attached to the outer wall of the tube. The handle valve 158 can be opened to allow the internal electrolyte to contact the tube, and electrochemical testing can be performed. After the test is completed, the handle valve 158 should be closed first. When the detection component 150 rises back to its original position, the electrolyte located between the handle valve 158 and the horn head 159 can be allowed to flow out to avoid wasting a large amount of electrolyte. Subsequently, electrolyte can be added to the liquid storage frame 151 through the guide bucket 155 to ensure that the tube can be electrochemically tested normally.

[0031] When the pipe to be tested cannot lie in the U-shaped seat 110, the constraint sleeve 157 can be lifted down and threadedly connected to the liquid storage frame 151, exposing the bent pipe 156. At this time, the first beveled pipe 1562, the second beveled pipe 1563, the third beveled pipe 1564 and the bottom pipe 1565 can be rotated one by one to make the bent pipe 156 bend until the horn head 159 can be perpendicular to the outer wall of the pipe. The horn head 159 can be fully aligned with the outer wall of the pipe to perform electrochemical testing. This satisfies the testing work of various types of pipes in power plants.

[0032] Please refer to this carefully. Figure 2 The bottom of the U-shaped base 110 is provided with a storage groove 112. The inner wall of the U-shaped base 110 is provided with multiple sets of grooves 111 that are connected to the storage groove 112 at equal intervals. A liquid collection frame 113 is slidably provided in the storage groove 112.

[0033] The electrolyte flowing down from the outer wall of the power plant pipes is collected and enters the collection frame 113 through the trough 111. This avoids water pollution on the power plant floor (due to slippage of the device or manual dumping) and allows the electrolyte to be collected and reused after treatment.

[0034] Please refer to this carefully. Figure 1 , Figure 3 , Figure 4 and Figure 5 The horn head 159 is made of horn-shaped rubber material, and a filter screen with a central protrusion is fixed inside the horn head 159.

[0035] By utilizing the soft properties of rubber, it can fully conform to the curved outer wall of the pipe, preventing excessive loss of electrolyte.

[0036] Please refer to this carefully. Figure 3 and Figure 4 The top of the constraint sleeve 157 is fixed to the bottom of the liquid storage frame 151 by a threaded connection.

[0037] The constraint sleeve 157 serves to lock the bending of the bent tube 156, preventing it from being obstructed. At the same time, when the constraint sleeve 157 is separated from the liquid storage frame 151, it is fitted onto the outside of the bent tube 156 to prevent bending when testing the tube directly below.

[0038] In use, the output of the drive motor 140 drives the lead screw 120 to rotate. Under the constraint of the auxiliary rod 130, the active plate 121 and the crossbeam 122 are lowered synchronously, causing the detection component 150 to lower and approach the tube in the U-shaped seat 110 until the horn head 159 is fully attached to the outer wall of the tube. The handle valve 158 can be opened to allow the internal electrolyte to contact the tube, and electrochemical testing can be performed. After the test is completed, the handle valve 158 should be closed first. When the detection component 150 rises back to its original position, the electrolyte located between the handle valve 158 and the horn head 159 can be allowed to flow out to avoid wasting a large amount of electrolyte. Subsequently, electrolyte can be added to the liquid storage frame 151 through the guide bucket 155 to ensure that the tube can be electrochemically tested normally.

[0039] When the pipe to be tested cannot lie within the U-shaped seat 110, the constraint sleeve 157 can be lifted downwards and threadedly connected to the liquid storage frame 151, exposing the bent pipe 156. At this time, the first beveled pipe 1562, the second beveled pipe 1563, the third beveled pipe 1564, and the bottom pipe 1565 can be rotated one by one to make the bent pipe 156 bend until the horn head 159 can be perpendicular to the outer wall of the pipe. The horn head 159 can be fully aligned with the outer wall of the pipe to perform electrochemical testing. This satisfies the testing work of various types of pipes in power plants. The parts not covered in this device are the same as or can be implemented using existing technologies.

[0040] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An on-site electrochemical testing device for large pipeline materials in power plants, comprising a base plate (100), characterized in that: A detection component (150) is provided above the base plate (100), and a U-shaped seat (110) is provided at the top of the base plate (100) below the detection component (150). A drive component for lifting and lowering the detection component (150) is installed at the top of the U-shaped seat (110). The detection component (150) includes a liquid storage frame (151), in which an auxiliary electrode (152) extending to the top of the liquid storage frame (151) is installed. A reference electrode (153) extending to the top of the liquid storage frame (151) is provided on one side of the auxiliary electrode (152). A working electrode (154) is provided on the side of the reference electrode (153) away from the auxiliary electrode (152), and the top of the working electrode (154) extends beyond the top of the liquid storage frame (151). The top of the container is provided with a guide bucket (155) extending into the liquid storage frame (151), and the guide bucket (155) is located between the auxiliary electrode (152) and the reference electrode (153). The bottom of the liquid storage frame (151) is connected to a bent tube (156). The outer wall of the bent tube (156) is fitted with a constraint sleeve (157) connected to the bottom of the liquid storage frame (151). The end of the bent tube (156) is equipped with a handle valve (158), and the bottom of the handle valve (158) is connected to a horn head (159). The bent tube (156) includes a base tube (1561) fixed to the bottom of the liquid storage frame (151). The bottom of the base tube (1561) is rotatably connected to a first inclined tube (1562). The bottom of the first inclined tube (1562) is rotatably provided with a second inclined tube (1563). The bottom of the second inclined tube (1563) is rotatably connected to a third inclined tube (1564). The bottom end of the third inclined tube (1564) is rotatably provided with a bottom tube (1565) that is connected to the handle valve (158).

2. The on-site electrochemical testing device for power plant large pipeline materials according to claim 1, characterized in that: The drive assembly includes a lead screw (120) rotatably mounted on the top of the base plate (100). The outer wall of the lead screw (120) is threaded with an active plate (121). A crossbeam (122) is fixed to the end face of the active plate (121). A sliding sleeve (123) is slidably mounted on the outside of the crossbeam (122). The front surface of the sliding sleeve (123) is provided with a constraint frame (124) for fixing the liquid storage frame (151). The front surface of the constraint frame (124) is rotatably fitted with bolts that abut against the liquid storage frame (151).

3. The on-site electrochemical testing device for power plant large pipeline materials according to claim 2, characterized in that: A top plate (131) is installed on the top of the lead screw (120), and a drive motor (140) for driving the lead screw (120) to rotate is installed on the top of the top plate (131). An auxiliary rod (130) is provided on one side of the lead screw (120) and fixed to the bottom plate (100) and the top plate (131). The active plate (121) is sleeved on the outer wall of the auxiliary rod (130) and the two are slidably connected.

4. The on-site electrochemical testing device for power plant large pipeline materials according to claim 1, characterized in that: The bottom of the U-shaped base (110) is provided with a storage groove (112), and the inner wall of the U-shaped base (110) is provided with multiple sets of grooves (111) that communicate with the storage groove (112) at equal intervals. A liquid collection frame (113) is slidably provided in the storage groove (112).

5. The on-site electrochemical testing device for power plant large pipeline materials according to claim 1, characterized in that: The horn head (159) is made of horn-shaped rubber material, and a filter screen with a central protrusion is fixed inside the horn head (159).

6. The on-site electrochemical testing device for power plant large pipeline materials according to claim 1, characterized in that: The top of the constraint sleeve (157) is fixed to the bottom of the liquid storage frame (151) by means of a threaded connection.

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