A tool for drying and leak testing

Abstract

The application provides a tool for drying and leakage detection, relates to the technical field of polysilicon, and comprises a first blocking balloon, a second blocking balloon, a first pressure regulating valve, a nitrogen source, a heater, a fixed drying air inlet pipe, a fixed drying air outlet pipe and a first drying air inlet cut-off valve. The first blocking balloon and the second blocking balloon are used for blocking the two ends of the air path of a pipe to be dried. The first pressure regulating valve is used for adjusting the inflation amount of the first blocking balloon and the second blocking balloon. The inlet of the heater is connected with the outlet of the nitrogen source. The second pressure regulating valve is arranged on the path from the outlet of the nitrogen source to the inlet of the heater. The fixed drying air inlet pipe is connected with the outlet of the heater and penetrates the first blocking balloon in a sealed mode. The first drying air inlet cut-off valve is arranged on the fixed drying air inlet pipe. The fixed drying air outlet pipe penetrates the second blocking balloon in a sealed mode. The first drying air outlet cut-off valve is arranged on the fixed drying air outlet pipe. The pipe to be dried is blocked by the first blocking balloon and the second blocking balloon, so that the pipe connection work on site is reduced. In addition, the pipe can be subjected to leakage detection before or after drying.

Description

Technical Field

[0001] This utility model relates to the field of polycrystalline silicon technology, and in particular to a tool for drying and leak detection. Background Technology

[0002] Heat exchangers and pressure pipelines are crucial equipment for ensuring the normal production of polysilicon. Due to the properties of the material, residual moisture in the heat exchangers and pressure pipelines needs to be dried after maintenance of the production equipment. Otherwise, moisture in the air can easily react with the material to produce free chloride ions, causing corrosion of the pipelines and equipment.

[0003] The current drying method involves manual nitrogen purging, which has the following drawbacks:

[0004] 1. Due to the influence of equipment structure and pipeline specifications, complex connection work is required on site.

[0005] 2. Due to the design structure of the equipment itself, there is a dead zone during the replacement process, which can easily lead to incomplete drying and thus shorten the equipment's lifespan. Utility Model Content

[0006] In view of the above, the present invention provides a tool for drying and leak detection, which aims to address at least one of the defects pointed out in the background art above.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model provides a tool for drying and leak detection, comprising:

[0009] First blocking balloon;

[0010] The second sealing balloon; the first sealing balloon and the second sealing balloon are used to seal the two ends of the gas passage of the drying pipeline, respectively;

[0011] The first pressure regulating valve is used to adjust the inflation volume of the first and second occlusion balloons;

[0012] Nitrogen source;

[0013] A heater, the inlet of which is connected to the outlet of the nitrogen supply source;

[0014] The second pressure regulating valve is installed on the path from the outlet of the nitrogen source to the inlet of the heater;

[0015] A fixed drying air inlet pipe is connected to the outlet of the heater and is sealed through the first sealing balloon; a first drying air inlet shut-off valve is provided on the fixed drying air inlet pipe;

[0016] A fixed drying exhaust pipe is provided, which is sealed through the second sealing balloon; a first drying exhaust shut-off valve is provided on the fixed drying exhaust pipe.

[0017] In some embodiments of this invention, both the first and second sealing balloons are connected to the outlet of the nitrogen supply source.

[0018] In some embodiments of this invention, a balloon pressure regulator is also included; the balloon pressure regulator is connected to the path from the outlet of the nitrogen source to the first and second blocking balloons.

[0019] In some embodiments of this utility model, it further includes:

[0020] A balloon pressure gauge is used to monitor the air pressure inside the balloon pressure regulator and is associated with the first pressure regulating valve;

[0021] A pressure sensor is used to monitor the gas pressure inside the heater and is associated with a second pressure regulating valve.

[0022] In some embodiments of this invention, there are at least two second occlusion balloons.

[0023] In some embodiments of this invention, the heater is an electric heater.

[0024] In some embodiments of this utility model, a dew point detector is also included; the dew point detector is connected to a fixed drying exhaust pipe.

[0025] In some embodiments of this invention, the dew point detector is associated with a first dry air inlet shut-off valve.

[0026] In some embodiments of this utility model, a telescopic drying air inlet pipe is also included; the telescopic drying air inlet pipe is connected to the outlet of the heater and is connected in parallel with the fixed drying air inlet pipe; the telescopic drying air inlet pipe is sealed through the first sealing balloon; and a second drying air inlet shut-off valve is provided on the telescopic drying air inlet pipe.

[0027] In some embodiments of this utility model, a telescopic drying exhaust pipe is also included; the telescopic drying exhaust pipe is sealed through the second sealing balloon; and a second drying exhaust shut-off valve is provided on the telescopic drying exhaust pipe.

[0028] The embodiments of this utility model have at least the following advantages or beneficial effects:

[0029] 1. By sealing both ends of the air passage of the drying pipeline with the first sealing balloon and the second sealing balloon, the on-site connection work is reduced (such as connecting the drying equipment to the air passage interfaces of the drying pipeline).

[0030] 2. Leak detection can also be performed on the pipeline before or after drying.

[0031] Other features and advantages of this invention will be set forth in the following description. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the tool used for drying and leak detection.

[0034] Icons: 1-First occlusion balloon, 11-First balloon inflation pipe, 2-Second occlusion balloon, 21-Second balloon inflation pipe, 3-First pressure regulating valve, 4-Nitrogen generator, 5-Heater, 6-Second pressure regulating valve, 7-Fixed dryer inlet pipe, 71-First dryer inlet shut-off valve, 8-Retractable dryer inlet pipe, 81-Second dryer inlet shut-off valve, 9-Fixed dryer exhaust pipe, 91-First dryer exhaust shut-off valve, 101-Balloon pressure regulator, 102-Retractable dryer exhaust pipe, 1021-Second dryer exhaust shut-off valve, 103-Dew point detector, 104-Balloon pressure gauge, 105-Pressure sensor. Detailed Implementation

[0035] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0036] In the description of the embodiments of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0038] The embodiments of this utility model will be described in detail below.

[0039] Example 1

[0040] See Figure 1 This embodiment provides a tool for drying and leak detection, including a first sealing balloon 1, a second sealing balloon 2, a first pressure regulating valve 3, a nitrogen source, a heater 5, a second pressure regulating valve 6, a fixed drying air inlet pipe 7, a telescopic drying air inlet pipe 8, and a fixed drying exhaust pipe 9.

[0041] The first occlusion balloon 1 is connected to the first balloon inflation tube 11.

[0042] The second sealing balloon 2 is connected to the second balloon inflation pipe 21; the first sealing balloon 1 and the second sealing balloon 2 are connected in parallel and are used to seal the two ends of the air passage of the drying pipe, respectively.

[0043] The first pressure regulating valve 3 is used to adjust the inflation volume of the first occlusion balloon 1 and the second occlusion balloon 2.

[0044] The nitrogen source includes a nitrogen generator 4 for supplying nitrogen gas. In other embodiments, the nitrogen source may be a nitrogen pressure storage tank.

[0045] Heater 5 is an electric heater. The inlet of heater 5 is connected to the outlet of the nitrogen supply source.

[0046] The second pressure regulating valve 6 is installed on the path from the outlet of the nitrogen supply source to the inlet of the heater 5.

[0047] The fixed drying air inlet pipe 7 is connected to the outlet of the heater 5 and is sealed through the first sealing balloon 1; a first drying air inlet shut-off valve 71 is provided on the fixed drying air inlet pipe 7.

[0048] The telescopic drying air inlet pipe 8 is connected to the outlet of the heater 5, and is connected in parallel with the fixed drying air inlet pipe 7; the telescopic drying air inlet pipe 8 seals through the first sealing balloon 1; a second drying air inlet shut-off valve 81 is installed on the telescopic drying air inlet pipe 8. The telescopic drying air inlet pipe 8 is a flexible rubber structure, and the insertion depth into the pipe is manually adjusted according to the pipe structure during installation.

[0049] The fixed dry exhaust pipe 9 is sealed through the second sealing balloon 2; the fixed dry exhaust pipe 9 is equipped with a first dry exhaust shut-off valve 91.

[0050] In use, the first sealing balloon 1 and the second sealing balloon 2 are inserted into the gas passages of the pipeline to be dried. The first sealing balloon 1 is inflated through the first balloon inflation pipe 11, and the second sealing balloon 2 is inflated through the second balloon inflation pipe 21. Under the action of the gas, the first sealing balloon 1 and the second sealing balloon 2 expand and seal against the pipeline. When the heater 5 dries the nitrogen gas from the nitrogen source to the predetermined temperature, the first drying inlet shut-off valve 71 and the first drying exhaust shut-off valve 91 are opened, using hot nitrogen gas to dry the pipeline equipment. After drying is complete, the first sealing balloon 1 and the second sealing balloon 2 are depressurized and removed.

[0051] The telescopic drying air inlet pipe 8 is a flexible rubber structure. During installation, the insertion depth into the pipe is manually adjusted according to the pipe structure. When the shape of the pipe is more complex, the position and depth of the telescopic drying air inlet pipe 8 can be adjusted, and the second drying air inlet shut-off valve 81 can be opened to avoid the existence of a drying dead zone.

[0052] In addition, before or after drying the connecting pipe, the heater 5, the first drying exhaust shut-off valve 91, and the second drying exhaust shut-off valve 1021 can be turned off. After filling the pipe with air, the second pressure regulating valve 6 can be turned off. After a period of time, the pipe can be checked for leaks by detecting changes in the air pressure inside the pipe.

[0053] In summary, this embodiment has at least the following beneficial effects:

[0054] First, by sealing both ends of the air passage of the drying pipeline with the first sealing balloon 1 and the second sealing balloon 2, the on-site connection work is reduced (such as connecting the drying equipment to the air passage interfaces of the drying pipeline).

[0055] Second, by adjusting the position and depth of the telescopic drying air inlet pipe 8 inserted into the pipeline and opening the second drying air inlet shut-off valve 81, air can be introduced at different positions in the pipeline to avoid the existence of a drying dead zone.

[0056] Third, leak detection can be performed on the pipeline before or after drying.

[0057] Example 2

[0058] See Figure 1 Unlike Example 1, in this example, the first balloon inflation pipe 11 (or the first sealing balloon 1) and the second balloon inflation pipe 21 (or the second sealing balloon 2) are both connected to the outlet of the nitrogen source. In this way, the two balloons and the drying process share a single gas source, reducing the number of supporting equipment.

[0059] This embodiment also includes a balloon pressure regulator 101, a telescopic drying exhaust pipe 102, and a dew point detector 103.

[0060] The balloon pressure regulator 101 is connected to the path from the outlet of the nitrogen source to the first balloon inflation pipe 11 (or the first blocking balloon 1) and the second balloon inflation pipe 21 (or the second blocking balloon 2), and plays a role in stabilizing pressure and buffering.

[0061] The telescopic drying exhaust pipe 102 seals and penetrates the second sealing balloon 2; a second drying exhaust shut-off valve 1021 is installed on the telescopic drying exhaust pipe 102. The telescopic drying exhaust pipe 102 is a flexible rubber structure, and its insertion depth into the pipe is manually adjusted according to the pipe structure during installation. The telescopic drying exhaust pipe 102 facilitates the discharge of gas from different locations within the pipe, thereby reducing dead zones.

[0062] The dew point detector 103 is connected to the telescopic drying exhaust pipe 102 and the fixed drying exhaust pipe 9. The dew point detector 103 is used to monitor the water vapor content in the airflow to facilitate the judgment of drying progress and drying effect.

[0063] Example 3

[0064] See Figure 1 This embodiment is an improvement on embodiment 2 to enhance the degree of automation.

[0065] The dew point detector 103 is associated with the first drying inlet shut-off valve 71 and the second drying inlet shut-off valve 81. When the dew point detector 103 detects that the dew point is within acceptable limits, the first drying inlet shut-off valve 71 and the second drying inlet shut-off valve 81 automatically close, ending the drying task.

[0066] This embodiment also includes a balloon pressure gauge 104 associated with the first pressure regulating valve 3 and a pressure sensor 105 associated with the second pressure regulating valve 6.

[0067] The balloon pressure gauge 104 is connected to the balloon pressure regulator 101 and is used to monitor the air pressure inside the balloon pressure regulator 101.

[0068] Pressure sensor 105 is connected to electric heater 5 and is used to monitor the air pressure inside heater 5.

[0069] The opening of the first pressure regulating valve 3 is automatically adjusted according to the data fed back by the balloon pressure gauge 104, and the opening of the second pressure regulating valve 6 is automatically adjusted according to the data fed back by the pressure sensor 105, so that the pressure in the balloon pressure regulator 101 is greater than the pressure in the electric heater 5, thereby making the pressure in the first sealing balloon 1 and the second sealing balloon 2 greater than the pressure in the drying pipeline, ensuring that the first sealing balloon 1 and the second sealing balloon 2 can be stably connected to both ends of the air passage of the drying pipeline.

[0070] Example 4

[0071] See Figure 1Unlike Embodiment 1, in this embodiment, there are at least two second sealing balloons 2 to accommodate situations where the drying pipe has more interfaces.

[0072] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tool for drying and leak detection, characterized in that, include: First blocking balloon; Second occlusion balloon; The first sealing balloon and the second sealing balloon are used to seal the two ends of the gas path of the drying pipeline, respectively. The first pressure regulating valve is used to adjust the inflation volume of the first occlusion balloon and the second occlusion balloon; Nitrogen source; A heater, the inlet of which is connected to the outlet of the nitrogen source; The second pressure regulating valve is located on the path from the outlet of the nitrogen supply source to the inlet of the heater; A fixed drying air inlet pipe is connected to the outlet of the heater and is sealed through the first sealing balloon; a first drying air inlet shut-off valve is provided on the fixed drying air inlet pipe; A fixed drying exhaust pipe is provided, which is sealed through the second sealing balloon; a first drying exhaust shut-off valve is provided on the fixed drying exhaust pipe.

2. The tool for drying and leak detection according to claim 1, characterized in that, Both the first and second occlusion balloons are connected to the outlet of the nitrogen supply source.

3. The tool for drying and leak detection according to claim 2, characterized in that, It also includes a balloon regulator; the balloon regulator is connected to the path from the outlet of the nitrogen supply source to the first occlusion balloon and the second occlusion balloon.

4. The tool for drying and leak detection according to claim 3, characterized in that, Also includes: A balloon pressure gauge is used to monitor the air pressure inside the balloon pressure regulator and is associated with the first pressure regulating valve; A pressure sensor is used to monitor the gas pressure inside the heater and is associated with the second pressure regulating valve.

5. The tool for drying and leak detection according to claim 1, characterized in that, There are at least two second occlusion balloons.

6. The tool for drying and leak detection according to claim 1, characterized in that, The heater is an electric heater.

7. The tool for drying and leak detection according to claim 1, characterized in that, It also includes a dew point detector; the dew point detector is connected to the fixed drying exhaust pipe.

8. The tool for drying and leak detection according to claim 7, characterized in that, The dew point detector is associated with the first dry air intake shut-off valve.

9. The tool for drying and leak detection according to any one of claims 1 to 8, characterized in that, It also includes a telescopic drying air inlet pipe; the telescopic drying air inlet pipe is connected to the outlet of the heater and is connected in parallel with the fixed drying air inlet pipe; the telescopic drying air inlet pipe is sealed through the first sealing balloon; a second drying air inlet shut-off valve is provided on the telescopic drying air inlet pipe.

10. The tool for drying and leak detection according to claim 9, characterized in that, It also includes a telescopic drying exhaust pipe; the telescopic drying exhaust pipe is sealed through the second sealing balloon; and a second drying exhaust shut-off valve is provided on the telescopic drying exhaust pipe.

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