A solar collector weld leak detection device

Abstract

This utility model discloses a leak detection device for weld seams of solar collectors, relating to the field of solar collector weld seam leak detection technology. The device includes: a shell; a first support base fixedly connected to the left side of the shell; a second support base disposed on the right side of the shell; an arc-shaped bracket fixedly connected to the upper end of both the first and second support bases; a collector tube disposed at the upper end of the arc-shaped bracket; and a first sealing plug disposed on the left side of the collector tube. This invention solves the problems of existing weld seam leak detection devices, such as low detection accuracy, the need to fill the collector tube with water to a set pressure and maintain the pressure when leak detection is required, the need to thoroughly drain and dry the residual moisture in the tube after detection, a time-consuming process, and the potential for residual moisture to cause secondary contamination to the subsequently assembled sealing rings and heat transfer medium. Furthermore, it lacks adjustment functionality and can only adapt to collector tubes of a single specification (length, diameter).

Description

Technical Field

[0001] This utility model relates to the field of weld leak detection technology for solar collectors, and in particular to a device for weld leak detection of solar collectors. Background Technology

[0002] As the core equipment for photothermal conversion, the sealing performance of the solar collector tubes (including the tube body and end welded structure) directly determines the service life and thermal efficiency of the equipment. If there are micro-leakage or penetrating leaks in the weld, it will not only cause leakage of the heat transfer medium (such as heat transfer oil or water) inside the tube, but also allow external air and water vapor to enter the tube, causing internal corrosion and scaling. In severe cases, it can render the collector tube unusable, increasing the user's maintenance costs. Therefore, it is necessary to use a weld leak detection device to test it.

[0003] However, existing technologies have some problems: existing weld leak detection devices have low detection accuracy. When leak detection is required, water must be filled into the collector tube to a set pressure and maintained. After detection, the water must be completely drained and the residual water in the tube dried. The whole process is time-consuming, and residual water can easily cause secondary pollution to the sealing rings and heat transfer medium that are subsequently assembled. In addition, it does not have an adjustment function and can only be adapted to a single specification (length, tube diameter) of collector tube. Therefore, it is necessary to provide a weld leak detection device for solar collectors to solve the above technical problems. Utility Model Content

[0004] This invention provides a leak detection device for weld seams of solar collectors, which solves the problems of existing leak detection devices, such as low detection accuracy, the need to fill the collector tube with water to a set pressure and maintain the pressure when leak detection is required, the need to thoroughly drain and dry the residual water in the tube after detection, the whole process is time-consuming, and the residual water can easily cause secondary pollution to the sealing ring and heat transfer medium that are subsequently assembled. In addition, it does not have an adjustment function and can only be adapted to a single specification (length, pipe diameter) of collector tube.

[0005] To solve the above-mentioned technical problems, this utility model provides a leak detection device for weld seams of solar collectors, comprising:

[0006] The outer casing has a first support base fixedly connected to its left side and a second support base provided on its right side. Both the first and second support bases have an arc-shaped bracket fixedly connected to their upper ends. A heat collection tube is provided at the upper end of the arc-shaped bracket. A first sealing plug is provided on the left side of the heat collection tube. A pressure sensor is provided on the left side of the first sealing plug. A controller is fixedly connected to the front of the upper end of the outer casing. The controller includes a display screen and an audible and visual alarm. A fixing plate is fixedly connected to the right side of the second support base.

[0007] An adjustment component and a detection component are included. The adjustment component is located in the housing and is used to drive the movement of the second support base. The detection component is located on the fixed plate and is used to perform gas filling and leak detection on the heat collection tube.

[0008] Preferably, the adjustment assembly includes an electric push rod, the output end of which is fixedly connected to a top plate, and support columns are fixedly connected to the front and rear sides of the right side of the top plate. One end of the support column extends out of the outer shell and is fixedly connected to the left side of the second support seat.

[0009] Preferably, guide blocks are fixedly connected to both the front and rear sides of the top plate, and guide rods are slidably connected inside the guide blocks, with the guide rods being laterally fixed inside the outer shell.

[0010] Preferably, the detection component includes a miniature air pump, the outlet of which is connected to an elastic tube, one end of which is connected to a second sealing plug, the left side of which is inserted into the right side of the heat collection tube.

[0011] Preferably, the front and rear sides of the lower ends of the first support base and the second support base are fixedly connected with casters, the surface of the casters is provided with a rubber anti-slip layer, and the controller, pressure sensor, detection component and adjustment component are electrically connected.

[0012] Preferably, a protective pad is provided at the connection between the upper end of the arc-shaped bracket and the lower end of the heat collection tube, and the lower end of the protective pad is fixedly connected to the upper end of the arc-shaped bracket.

[0013] Compared with related technologies, the leak detection device for weld seams of solar collectors provided by this utility model has the following advantages:

[0014] This utility model provides a leak detection device for weld seams of solar collectors. The use of casters facilitates the movement of the first and second support seats during use, thus solving the problem of the first and second support seats being difficult to move during use.

[0015] This utility model provides a leak detection device for weld seams of solar collectors. Through the cooperation of guide blocks and guide rods, it plays a role in preventing vibration of the top plate during use, thus solving the problem of vibration that easily occurs during the use of the top plate.

[0016] This utility model provides a leak detection device for weld seams of solar collectors. By setting up a protective pad, it plays a role in preventing the heat collection pipe from being bumped during use, thus solving the problem that the heat collection pipe and the arc-shaped bracket are prone to bumping during use. Attached Figure Description

[0017] Figure 1 A schematic diagram of a preferred embodiment of a leak detection device for weld seams of solar collectors provided by this utility model;

[0018] Figure 2 This is a schematic diagram showing the unfolded structure of the arc-shaped bracket and heat collection tube of this utility model;

[0019] Figure 3 This is a top sectional view of the outer shell structure of this utility model.

[0020] Labels in the diagram: 1. Outer shell; 2. First support base; 3. Second support base; 4. Arc-shaped bracket; 5. Heat collection tube; 6. First sealing plug; 7. Pressure sensor; 8. Controller; 9. Fixing plate; 10. Adjustment assembly; 101. Electric push rod; 102. Top plate; 103. Support column; 11. Detection assembly; 111. Miniature air pump; 112. Elastic tube; 113. Second sealing plug; 12. Guide block; 13. Guide rod; 14. Caster wheel. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Example 1:

[0023] Please see Figure 1-3 This utility model provides a technical solution: a leak detection device for weld seams of solar collectors, comprising: a shell 1, a first support 2 fixedly connected to the left side of the shell 1, a second support 3 provided on the right side of the shell 1, an arc-shaped bracket 4 fixedly connected to the upper end of both the first support 2 and the second support 3, a heat collection tube 5 provided at the upper end of the arc-shaped bracket 4, a first sealing plug 6 provided on the left side of the heat collection tube 5, a pressure sensor 7 provided on the left side of the first sealing plug 6, a controller 8 fixedly connected to the front side of the upper end of the shell 1, the controller 8 including a display screen and an audible and visual alarm, a fixing plate 9 fixedly connected to the right side of the second support 3, an adjustment component 10 and a detection component 11, the adjustment component 10 being located in the shell 1 and used to drive the movement of the second support 3, and the detection component 11 being located on the fixing plate 9 and used to perform air inflation leak detection on the heat collection tube 5.

[0024] In this implementation scheme, based on the length of the heat collection tube 5 to be tested, the electric push rod 101 is activated by the controller 8. The output end of the electric push rod 101 pushes the top plate 102 to move laterally, causing the support column 103 and the second support seat 3 to move synchronously until the distance between the arc brackets 4 on the first support seat 2 and the second support seat 3 matches the length of the heat collection tube 5. During the movement, the top plate 102 drives the guide block 12 to slide on the guide rod 13 to ensure that the second support seat 3 moves smoothly without deviation. Then, the heat collection tube 5 to be tested is placed smoothly on the two arc brackets 4, so that the axis of the heat collection tube 5 is aligned with the center of the arc bracket 4. The lateral position of the heat collection tube 5 is fixed by the limiting effect of the arc bracket 4. At this time, the left end of the heat collection tube 5 is aligned with the first sealing plug 6, and the right end corresponds to the second sealing plug 113.

[0025] Example 2:

[0026] Please see Figure 1-3 As shown, based on Embodiment 1, this utility model provides a technical solution: the adjustment component 10 includes an electric push rod 101, the output end of which is fixedly connected to a top plate 102. Support columns 103 are fixedly connected to the front and rear sides of the right side of the top plate 102. One end of the support column 103 extends outside the outer shell 1 and is fixedly connected to the left side of the second support seat 3. Guide blocks 12 are fixedly connected to the front and rear sides of the top plate 102. A guide rod 13 is slidably connected inside the guide block 12. The guide rod 13 is laterally fixedly connected inside the outer shell 1. The detection component 11 includes a miniature air pump 1. 11. The outlet end of the micro air pump 111 is connected to an elastic tube 112. One end of the elastic tube 112 is connected to a second sealing plug 113. The left side of the second sealing plug 113 is inserted into the right side of the heat collection tube 5. The front and rear sides of the lower ends of the first support base 2 and the second support base 3 are fixedly connected to casters 14. The surface of the casters 14 is provided with a rubber anti-slip layer. The controller 8, pressure sensor 7, detection component 11 and adjustment component 10 are electrically connected. A protective pad is provided at the connection between the upper end of the arc bracket 4 and the lower end of the heat collection tube 5, and the lower end of the protective pad is fixedly connected to the upper end of the arc bracket 4.

[0027] In this embodiment: The second sealing plug 113 is manually pushed to ensure it is tightly inserted into the right port of the heat collector tube 5, while simultaneously confirming that the first sealing plug 6 is sealed to the left port of the heat collector tube 5, ensuring that a sealed space is formed inside the heat collector tube 5. The micro air pump 111 is started by the controller 8, and compressed air is injected into the heat collector tube 5 through the elastic tube 112. When the pressure sensor 7 detects that the pressure inside the heat collector tube 5 reaches the set value, the controller 8 automatically shuts off the micro air pump 111 and enters the pressure holding stage. During the pressure holding period, the pressure sensor 7 transmits the pressure data to the display screen on the controller 8 in real time. The display screen dynamically displays the pressure change curve. If the pressure drops, it is determined that there is a leak. The controller 8 triggers the audible and visual alarm to sound an alarm. The staff can combine the pressure drop curve with the fact that the faster the pressure drops, the larger the leak. They can apply soapy water to the weld surface to locate the leak, and after repair, re-inspect.

[0028] The working principle of the leak detection device for weld seams of solar collectors provided by this utility model is as follows:

[0029] Implementation steps for the first innovation point:

[0030] Step 1: Based on the length of the heat collection tube 5 to be tested, the electric push rod 101 is activated by the controller 8. The output end of the electric push rod 101 pushes the top plate 102 to move laterally, causing the support column 103 and the second support seat 3 to move synchronously until the distance between the arc brackets 4 on the first support seat 2 and the second support seat 3 matches the length of the heat collection tube 5. During the movement, the top plate 102 drives the guide block 12 to slide on the guide rod 13 to ensure that the second support seat 3 moves smoothly without deviation.

[0031] Step 2: Then, place the heat collection tube 5 to be tested stably on the two arc-shaped brackets 4, aligning the axis of the heat collection tube 5 with the center of the arc-shaped brackets 4. Use the limiting effect of the arc-shaped brackets 4 to fix the lateral position of the heat collection tube 5. At this time, the left end of the heat collection tube 5 is aligned with the first sealing plug 6, and the right end is aligned with the second sealing plug 113.

[0032] Implementation steps for the second innovation point:

[0033] Step 1: Manually push the second sealing plug 113 to make it tightly inserted into the right port of the heat collector tube 5, while confirming that the first sealing plug 6 is in close contact with the left port of the heat collector tube 5 to ensure that a sealed space is formed inside the heat collector tube 5. Start the micro air pump 111 through the controller 8, and inject compressed air into the heat collector tube 5 through the elastic tube 112. When the pressure sensor 7 detects that the pressure inside the heat collector tube 5 reaches the set value, the controller 8 automatically shuts off the micro air pump 111 and enters the pressure holding stage.

[0034] Step 2: During the pressure holding period, the pressure sensor 7 transmits the pressure data to the display screen on the controller 8 in real time. The display screen dynamically displays the pressure change curve. If the pressure drops, it is determined that there is a leak. The controller 8 triggers the audible and visual alarm to sound an alarm. The staff can combine the pressure drop curve with the fact that the faster the pressure drops, the larger the leak is. They can apply soapy water to the weld surface to locate the leak. After the repair is completed, the leak is retested.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak detection device for weld seams of solar collectors, characterized in that: include: The outer shell (1) has a first support base (2) fixedly connected to its left side and a second support base (3) provided on its right side. Both the first support base (2) and the second support base (3) have an arc-shaped bracket (4) fixedly connected to their upper ends. The arc-shaped bracket (4) has a heat collection tube (5) at its upper end. The heat collection tube (5) has a first sealing plug (6) on its left side and a pressure sensor (7) on its left side. The front side of the upper end of the outer shell (1) is fixedly connected to a controller (8), which includes a display screen and an audible and visual alarm. The right side of the second support base (3) is fixedly connected to a fixing plate (9). Adjustment component (10) and detection component (11), wherein the adjustment component (10) is located in the housing (1) and is used to drive the movement of the second support base (3), and the detection component (11) is located on the fixed plate (9) and is used to perform air inflation and leak detection on the heat collection tube (5).

2. The leak detection device for weld seams of solar collectors according to claim 1, characterized in that, The adjustment assembly (10) includes an electric push rod (101), the output end of which is fixedly connected to a top plate (102). Support columns (103) are fixedly connected to the front and rear sides of the right side of the top plate (102). One end of the support column (103) extends to the outside of the outer shell (1) and is fixedly connected to the left side of the second support seat (3).

3. A leak detection device for weld seams of solar collectors according to claim 2, characterized in that, Guide blocks (12) are fixedly connected to the front and rear sides of the top plate (102). A guide rod (13) is slidably connected inside the guide block (12). The guide rod (13) is horizontally fixedly connected inside the outer shell (1).

4. A leak detection device for weld seams of solar collectors according to claim 1, characterized in that, The detection component (11) includes a micro air pump (111), the outlet of which is connected to an elastic tube (112), one end of which is connected to a second sealing plug (113), the left side of which is inserted into the right side of the heat collection tube (5).

5. A leak detection device for weld seams of solar collectors according to claim 1, characterized in that, The first support base (2) and the second support base (3) are both fixedly connected to the front and rear sides of the lower end of the universal wheel (14). The surface of the universal wheel (14) is provided with a rubber anti-slip layer. The controller (8), pressure sensor (7), detection component (11) and adjustment component (10) are electrically connected.

6. A leak detection device for weld seams of solar collectors according to claim 1, characterized in that, A protective pad is provided at the connection between the upper end of the arc-shaped bracket (4) and the lower end of the heat collection tube (5), and the lower end of the protective pad is fixedly connected to the upper end of the arc-shaped bracket (4).

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