Pickling passivation device and passivation method for inner wall of pipeline for conveying high-purity gas

Abstract

The invention discloses a high-purity gas conveying pipeline inner wall pickling passivation device and a passivation method.The device comprises a moving frame and three containing boxes, a plurality of liquid inlet pipes are obliquely arranged at the bottoms of the containing boxes, three sets of auxiliary pipes are arranged on one side of the moving frame, and the moving frame drives the auxiliary pipes to make contact with a pipeline in the a direction and pushes the pipeline; and until the other end of the pipeline is pushed to make contact with the liquid inlet pipe, the two ends of the pipeline are sealed by the auxiliary pipe and the liquid inlet pipe, and the solution in the containing box rapidly enters the pipeline from the liquid inlet pipe to be subjected to cleaning work or acid pickling work or passivation work. After the two ends of the pipeline are sealed by the auxiliary pipe and the liquid inlet pipe, the solution in the containing box is injected into the pipeline, the pickling solution and the passivation solution with volatile substances are located in the sealed environment, the influence on the working environment is avoided, and therefore the health of workers is guaranteed; and the waste of pickling solution and passivation solution resources is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of pickling and passivation devices, and in particular relates to a pickling and passivation device for the inner wall of a pipeline for conveying high-purity gas, and a passivation method for the pickling and passivation device for the inner wall of a pipeline for conveying high-purity gas. Background Art

[0002] The water, oil, gas and other media transportation pipelines in chemical, oil and gas, coal mining, construction and other industries need to be fully pickled and passivated on the inner wall of the pipeline, which can remove all kinds of oil, rust, scale, welding spots and other dirt, and form an oxide film on the inner wall surface of the pipeline, which can greatly improve the corrosion resistance of the pipeline.

[0003] In the prior art, the pickling and passivation of the pipes is performed by overall immersion. Since the pickling liquid and the passivation liquid are placed in the open, the pickling liquid and the passivation liquid will volatilize and pollute the working environment, and cause harm to the eyes, mouth, nose and skin of the workers. Summary of the invention

[0004] The present invention aims at the problem that the pickling solution and passivation solution placed in the open in the prior art will volatilize and pollute the environment and affect the health of workers, and proposes the following technical solutions:

[0005] A pickling and passivation device for the inner wall of a pipeline for high-purity gas transportation comprises: a mobile frame and three placement boxes, wherein the three placement boxes sequentially hold a cleaning liquid, a pickling liquid and a passivation liquid in the direction b, a plurality of liquid inlet pipes are obliquely arranged at the bottom of the placement box, three groups of auxiliary pipes are arranged on one side of the mobile frame, and the number of auxiliary pipes in the same group is three, the pipes are arranged between the liquid inlet pipes and the auxiliary pipes, the mobile frame is connected to an external driving device, and the external driving device drives the mobile frame to reciprocate in the direction a;

[0006] The movable frame drives the auxiliary tube in direction a to contact the pipeline and push it until the other end of the pipeline is pushed to contact the liquid inlet pipe, and the two ends of the pipeline are then sealed by the auxiliary tube and the liquid inlet pipe, and the solution in the placement box quickly enters the pipeline from the liquid inlet pipe for cleaning, pickling or passivation.

[0007] As a preferred embodiment of the above technical solution, it also includes a conveying component, which is used to convey the pipeline in direction b to pass through a cleaning position, a pickling position or a passivation position in sequence.

[0008] As a preferred embodiment of the above technical solution, the conveying assembly includes a conveyor belt, a plurality of placement racks are arranged on the surface of the conveyor belt, a return part is arranged at one end of the placement rack, and the return part is used to push back and reset the pipeline moving in direction a.

[0009] As a preferred embodiment of the above technical solution, the return part includes a plurality of return rods, and a return spring is fixedly connected between one end of the return rod and the placement rack.

[0010] As a preferred embodiment of the above technical solution, a cleaning component is also included, which includes a discharge pipe and a tee pipe. The discharge pipe is located at the top of the liquid inlet pipe. The three ports of the tee pipe are respectively connected to the auxiliary pipe, the external water storage mechanism, and the external air compressor. The external air compressor injects gas into the pipeline through the tee pipe and the auxiliary pipe to air-dry the pipeline. The discharge pipe is used to discharge the injected gas and water washing liquid.

[0011] As a preferred embodiment of the above technical solution, sealing gaskets are provided at the ends of the auxiliary tube and the liquid inlet tube, and the sealing gaskets are used for sealing between the auxiliary tube and the pipeline, and between the liquid inlet tube and the pipeline.

[0012] As a preferred embodiment of the above technical solution, a water pump driven by a motor is installed inside the liquid outlet pipe to inject the solution in the storage box into the pipeline.

[0013] The passivation method of the pickling passivation device for the inner wall of a pipeline for high-purity gas transportation is characterized by comprising the following steps:

[0014] S1. Pipeline transportation;

[0015] The conveyor belt transports the pipes on the rack through the cleaning position, pickling position or passivation position in sequence, and replenishes the pipes after the pipes move to the next working position;

[0016] S2, pipeline is sealed;

[0017] The external driving device drives the moving frame to move in direction a, and the auxiliary pipe contacts one end of the pipeline and pushes it until the other end of the pipeline is pushed to contact the liquid inlet pipe, and the two ends of the pipeline are sealed by the auxiliary pipe and the liquid inlet pipe;

[0018] S3, injecting reaction solution;

[0019] Open the valve of the liquid inlet pipe, and quickly let the solution in the placement box enter the pipeline from the liquid inlet pipe until the liquid level submerges the top of the pipeline. The solution then cleans, pickles or passivates the inner wall surface of the pipeline.

[0020] S4, pipeline removal;

[0021] The external drive device drives the mobile frame to reset and retract the auxiliary pipe, so that workers can remove the pipe after cleaning, pickling and passivation.

[0022] The beneficial effects of the present invention are:

[0023] 1. After both ends of the pipeline are sealed by auxiliary pipes and liquid inlet pipes, the solution in the placement box is injected into the pipeline. The volatile pickling liquid and passivation liquid are in a closed environment to avoid affecting the working environment, thereby protecting the health of workers, and only the inner wall surface of the pipeline is processed to reduce the waste of pickling liquid and passivation liquid resources;

[0024] 2. The cleaning component can be injected with water washing liquid and gas flow in sequence. After the residual solution on the surface of the pipeline is cleaned and discharged with the water washing liquid, the gas flow is introduced to evaporate the residual water washing liquid and air-dry the inner wall of the pipeline, so as to prevent the water washing liquid from entering the solution in the next stage and reduce the impact on the pickling and passivation work;

[0025] 3. The set recovery part can use the movement of the pipeline to convert kinetic energy into elastic potential energy storage, and use the stored elastic potential energy to push the pipeline to reset, so as to facilitate the workers to place and take materials from the pipeline. At the same time, the recovery part can block the pipeline, leaving an observation position for the liquid inlet pipe and the auxiliary pipe, which is convenient for workers to check and avoid solution leakage caused by damage to the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 What is shown is a schematic diagram of the overall structure of the embodiment;

[0027] Figure 2 What is shown is a front view of the conveying assembly in the embodiment;

[0028] Figure 3 What is shown is the placement diagram of the pipeline in the embodiment;

[0029] Figure 4 Shown is a diagram of the installation position of the return portion in the embodiment.

[0030] In the figure: 10, mobile rack; 20, placement box; 30, liquid inlet pipe; 30, auxiliary pipe; 50, sealing gasket; 61, conveyor belt; 62, placement rack; 63, return part; 631, return rod; 632, return spring; 71, discharge pipe; 72, three-way pipe; 80, pipeline. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings of the specification.

[0032] Example

[0033] Figure 1In the embodiment, the pickling and passivation device for the inner wall of a pipeline 80 for high-purity gas delivery comprises: a mobile frame 10 and three placement boxes 20, wherein the three placement boxes 20 sequentially hold cleaning liquid, pickling liquid and passivation liquid in the direction b, and a plurality of liquid inlet pipes 30 are obliquely arranged at the bottom of the placement box 20, and three groups of auxiliary pipes 30 are arranged on one side of the mobile frame 10, and the number of auxiliary pipes 30 in the same group is three, and the pipeline 80 is arranged between the liquid inlet pipe 30 and the auxiliary pipe 30, and the angle between the pipeline 80 and the horizontal plane is 5 degrees to 11 degrees, and the liquid inlet pipe 30 and the auxiliary pipe 30 match the pipeline 80, and the mobile frame 10 is connected to an external driving device, and the external driving device drives the mobile frame 10 to reciprocate in the direction a;

[0034] The movable frame 10 drives the auxiliary tube 30 in direction a to contact and push the pipeline 80 until the other end of the pipeline 80 is pushed to contact the liquid inlet tube 30. The two ends of the pipeline 80 are then sealed by the auxiliary tube 30 and the liquid inlet tube 30. The solution in the placement box 20 quickly enters the pipeline 80 from the liquid inlet tube 30 for cleaning, pickling or passivation.

[0035] After both ends of the pipeline 80 are sealed by the auxiliary pipe 30 and the liquid inlet pipe 30, the solution in the placement box 20 is injected into the pipeline 80. The volatile pickling liquid and passivation liquid are in a closed environment to avoid affecting the working environment, thereby protecting the health of workers, and only the inner wall surface of the pipeline 80 is processed to reduce the waste of pickling liquid and passivation liquid resources.

[0036] The passivation method of the pickling passivation device for the inner wall of the high-purity gas delivery pipeline 80 is characterized by comprising the following steps:

[0037] S1, pipeline 80 transportation;

[0038] The conveyor belt 61 sequentially transports the pipe 80 on the placement rack 62 through the cleaning position, the pickling position or the passivation position, and replenishes the pipe 80 after the pipe 80 moves to the next working position;

[0039] S2, pipeline 80 is closed;

[0040] The external driving device drives the moving frame 10 to move in the direction a, and the auxiliary pipe 30 contacts one end of the pipeline 80 and pushes it until the other end of the pipeline 80 contacts the liquid inlet pipe 30, and the two ends of the pipeline 80 are sealed by the auxiliary pipe 30 and the liquid inlet pipe 30;

[0041] S3, injecting reaction solution;

[0042] The valve of the liquid inlet pipe 30 is opened, and the solution in the placement box 20 is quickly introduced into the pipe 80 from the liquid inlet pipe 30 until the liquid level submerges the top of the pipe 80 , and the solution then cleans, pickles or passivates the inner wall surface of the pipe 80 .

[0043] S4, pipeline 80 is removed;

[0044] The external driving device drives the movable frame 10 to reset and retract the auxiliary pipe 30, and the worker can remove the pipe 80 after cleaning, pickling and passivation.

[0045] The pipeline 80 first passes through the cleaning position to treat the residual oil stains on the inner wall, and then passes through the pickling position and the passivation position for pickling and passivation work. While ensuring the reaction time of the solution, there is no need to move the pipeline 80 after each treatment process, which can effectively reduce the workload of workers and reduce the work intensity of workers.

[0046] Figure 1-Figure 3 The method further includes a conveying component, which is used to convey the pipeline 80 in direction b to pass through a cleaning position, a pickling position or a passivation position in sequence.

[0047] The conveying assembly includes a conveyor belt 61, a plurality of placement racks 62 are arranged on the surface of the conveyor belt 61, and a return portion 63 is arranged at one end of the placement rack 62. The return portion 63 is used to push back and reset the pipe 80 moving in the direction a.

[0048] The conveying assembly can convey the pipe 80 in direction b, so that the pipe 80 passes through the cleaning position, the pickling position and the passivation position in sequence. Workers only need to load and unload the pipe 80 without having to move the pipe 80 multiple times.

[0049] Figure 1-Figure 4 In the embodiment, the restoring portion 63 includes a plurality of restoring rods 631 , and a restoring spring 632 is fixedly connected between one end of the restoring rod 631 and the placement rack 62 .

[0050] After the pipe 80 is placed, the end of the pipe 80 contacts the surface of the return rod 631. Due to the strong friction between the return rod 631 and the surface of the pipe 80, the pipe 80 will not fall and contact the surface of the liquid inlet pipe 30. When the auxiliary pipe 30 pushes the pipe 80 to move, the surface of one end of the pipe 80 contacts the return rod 631 and pushes it. The return spring 632 is compressed and deformed to store elastic potential energy. When the auxiliary pipe 30 is reset, the return spring 632 is reset under the elastic potential energy to push the return rod 631, and the pipe 80 moves up accordingly, making it convenient to take materials from the pipe 80.

[0051] The restoring part 63 can utilize the movement of the pipeline 80 to convert kinetic energy into elastic potential energy for storage, and utilize the stored elastic potential energy to push the pipeline 80 to reset, thereby facilitating workers to place and take materials from the pipeline 80. At the same time, the restoring part 63 can block the pipeline 80, leaving an observation position for the liquid inlet pipe 30 and the auxiliary pipe 30, facilitating workers to inspect and avoiding damage to the device causing solution leakage.

[0052] Figure 1 The invention also includes a cleaning component, which includes a discharge pipe 71 and a tee pipe 72. The discharge pipe 71 is located at the top of the liquid inlet pipe 30. The three ports of the tee pipe 72 are respectively connected to the auxiliary pipe 30, the external water storage mechanism, and the external air compressor. The external water storage mechanism injects the washing liquid into the pipeline 80 through the tee pipe 72 and the auxiliary pipe 30 to wash the pipeline 80. The external air compressor injects the gas into the pipeline 80 through the tee pipe 72 and the auxiliary pipe 30 to air-dry the pipeline 80. The discharge pipe 71 is used to discharge the injected gas or washing liquid.

[0053] After the solution returns to the placement box 20, the valve body of the liquid inlet pipe 30 is closed, and the external water storage mechanism injects the washing liquid into the pipeline 80 through the three-way pipe 72 and the auxiliary pipe 30. The washing liquid cleans the solution remaining on the surface of the pipeline 80. After the cleaning is completed, the valve body of the auxiliary pipe 30 is opened to discharge the washing liquid. The washing liquid containing the solution is treated by a subsequent treatment method. Then, the external air compressor injects gas into the pipeline 80 through the three-way pipe 72 and the auxiliary pipe 30. The airflow passes through the inner wall surface of the pipeline 80 to evaporate the residual washing liquid, thereby drying the inner wall of the pipeline 80.

[0054] The cleaning component is capable of injecting water washing liquid and gas flow in sequence. After the residual solution on the surface of the pipe 80 is cleaned and discharged by the water washing liquid, the gas flow is introduced to evaporate the residual water washing liquid and air-dry the inner wall of the pipe 80, thereby preventing the water washing liquid from entering the solution in the next stage and reducing the impact on the pickling and passivation work.

[0055] Figure 1 In the embodiment, sealing gaskets 50 are provided at the ends of the auxiliary tube 30 and the liquid inlet tube 30 , and the sealing gaskets 50 are used for sealing between the auxiliary tube 30 and the pipeline 80 , and between the liquid inlet tube 30 and the pipeline 80 .

[0056] The provided sealing gasket 50 can seal between the auxiliary tube 30 and the pipeline 80, and between the liquid inlet tube 30 and the pipeline 80, thereby preventing leakage of the solution and preventing damage to the device and the pipeline 80 caused by rigid contact between the auxiliary tube 30 and the pipeline 80, and between the liquid inlet tube 30 and the pipeline 80.

[0057] Figure 1 In the embodiment, a water pump driven by a motor is installed inside the liquid outlet pipe to inject the solution in the placement box 20 into the pipeline 80.

[0058] The water pump arranged inside the liquid outlet pipe can lift the solution from the placement box 20 to the liquid outlet pipe, so that the solution quickly rises inside the pipe 80 and immerses the entire inner wall of the pipe 80, thereby avoiding different reactions on the inner wall surface of the pipe 80 resulting in different thicknesses of the oxide film.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them.

Claims

1. A device for pickling and passivating the inner wall of a pipeline (80) for high-purity gas transportation, include: A movable rack (10) and three placement boxes (20), wherein the three placement boxes (20) are used to sequentially hold cleaning liquid, pickling liquid and passivation liquid in the direction b, characterized in that a plurality of liquid inlet pipes (30) are obliquely arranged at the bottom of the placement box (20), three groups of auxiliary pipes (30) are arranged on one side of the movable rack (10), and the number of the auxiliary pipes (30) in the same group is three, and the pipeline (80) is arranged between the liquid inlet pipes (30) and the auxiliary pipes (30), and the movable rack (10) is connected to an external driving device, and the external driving device drives the movable rack (10) to reciprocate in the direction a; The movable frame (10) drives the auxiliary pipe (30) in direction a to contact the pipeline (80) and pushes it until the other end of the pipeline (80) is pushed to contact the liquid inlet pipe (30), and the two ends of the pipeline (80) are then sealed by the auxiliary pipe (30) and the liquid inlet pipe (30), and the solution in the placement box (20) quickly enters the pipeline (80) from the liquid inlet pipe (30) to perform cleaning work, pickling work or passivation work.

2. The device for pickling and passivating the inner wall of a pipeline (80) for conveying high-purity gas according to claim 1, It is characterized in that It also includes a conveying component, which is used to convey the pipeline (80) in direction b to sequentially pass through a cleaning position, a pickling position or a passivation position.

3. The device for pickling and passivating the inner wall of the high-purity gas delivery pipeline (80) according to claim 2, It is characterized in that The conveying assembly comprises a conveyor belt (61), a plurality of placement racks (62) are arranged on the surface of the conveyor belt (61), a return portion (63) is arranged at one end of the placement rack (62), and the return portion (63) is used to push back and reset the pipeline (80) moving in the direction a.

4. The device for pickling and passivating the inner wall of a pipeline (80) for conveying high-purity gas according to claim 3, It is characterized in that The return portion (63) comprises a plurality of return rods (631), and a return spring (632) is fixedly connected between one end of the return rod (631) and the placement rack (62).

5. The device for pickling and passivating the inner wall of a pipeline (80) for conveying high-purity gas according to claim 1, It is characterized in that The cleaning assembly also includes a discharge pipe (71) and a three-way pipe (72). The discharge pipe (71) is located at the top of the liquid inlet pipe (30). The three ports of the three-way pipe (72) are respectively connected to the auxiliary pipe (30), the external water storage mechanism, and the external air compressor. The external water storage mechanism injects water washing liquid into the pipeline (80) through the three-way pipe (72) and the auxiliary pipe (30) to wash the pipeline (80). The external air compressor injects gas into the pipeline (80) through the three-way pipe (72) and the auxiliary pipe (30) to air-dry the pipeline (80). The discharge pipe (71) is used to discharge the injected gas and water washing liquid.

6. The device for pickling and passivating the inner wall of a pipeline (80) for conveying high-purity gas according to claim 1, It is characterized in that The ends of the auxiliary tube (30) and the liquid inlet tube (30) are both provided with sealing gaskets (50), and the sealing gaskets (50) are used for sealing between the auxiliary tube (30) and the pipeline (80), and between the liquid inlet tube (30) and the pipeline (80).

7. The device for pickling and passivating the inner wall of a pipeline (80) for conveying high-purity gas according to claim 1, It is characterized in that A water pump driven by a motor is installed inside the liquid outlet pipe, which is used to inject the solution in the storage box (20) into the pipeline (80).

8. A passivation method for the pickling and passivation device for the inner wall of a high-purity gas delivery pipeline (80) according to any one of claims 1 to 7, It is characterized in that The following steps are included: S1, pipeline (80) transportation; The conveyor belt (61) sequentially transports the pipe (80) on the placement rack (62) through a cleaning position, a pickling position or a passivation position, and replenishes the pipe (80) after the pipe (80) moves to the next working position; S2, pipeline (80) is sealed; The external driving device drives the moving frame (10) to move in the direction a, and the auxiliary pipe (30) contacts one end of the pipeline (80) and pushes it until the other end of the pipeline (80) contacts the liquid inlet pipe (30), and the two ends of the pipeline (80) are sealed by the auxiliary pipe (30) and the liquid inlet pipe (30); S3, injecting reaction solution; The valve of the liquid inlet pipe (30) is opened, and the solution in the storage box (20) is quickly introduced into the pipeline (80) from the liquid inlet pipe (30) until the liquid surface submerges the top of the pipeline (80), and the solution then cleans, pickles or passivates the inner wall surface of the pipeline (80). S4, pipeline (80) is removed; The external driving device drives the movable frame (10) to reset and retract the auxiliary pipe (30), so that the worker can remove the pipe (80) after cleaning, pickling and passivation.

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