Lifting device and air-tight pressure tester

Abstract

The utility model relates to the field of lifting, especially a lifting device and airtight pressure testing machine, including lifting drive mechanism and testing mechanism, the testing mechanism includes the test platform and sets up a plurality of elevating gear in the test platform bottom, elevating gear is along the extension direction of test platform and is arranged, lifting drive mechanism and test platform are connected, elevating gear includes first connecting block, second connecting block and connecting rod, first connecting block sets up on the test platform, second connecting block is fixedly arranged below test platform, the both ends of connecting rod are connected with first connecting block and second connecting block swingly, the driving direction of lifting drive mechanism and the plane of test platform form the preset angle between, to drive test platform to lift. Adopt the utility model, prevent deformation, reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of lifting, and in particular to a lifting device and an airtight pressure testing machine. Background Technology

[0002] An airtightness testing machine works by sealing both ends of a steel pipe with plugs, immersing the pipe in water, and then filling it with air. Once a certain pressure is reached, the pressure is maintained to test whether the steel pipe leaks. Rotating the steel pipe in the water is to observe where the bubbles emerge, indicating the location of the leak, thus facilitating the identification of the leak.

[0003] An airtightness testing machine generally includes a water tank, a testing platform, and a drive mechanism, with the steel pipe fixed on the testing platform. Traditionally, the water tank is raised and lowered by the drive mechanism to immerse the steel pipe in the water. However, because the water tank holds a large amount of water and is heavy, the drive mechanism requires significant energy, resulting in high costs. Therefore, current systems often use a drive mechanism to raise and lower the testing platform to immerse the steel pipe in the water.

[0004] The steel pipes used for testing are typically 12, 15, or 20 meters long, and the testing platform usually needs to be the same length as the pipe, or even longer. Due to the length of the testing platform, drive mechanisms are usually installed at both ends to ensure stable lifting and lowering. The structure of the testing platform varies; some use a single-beam structure, but without central support, it is prone to sagging and deformation, affecting the loading / unloading and pressure testing processes. Others use a truss structure, which is bulky, increases drive energy consumption, and raises costs. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a lifting device that prevents deformation and reduces costs.

[0006] The technical problem to be solved by this utility model is to provide an airtight pressure tester including the lifting device.

[0007] To solve the above-mentioned technical problems, this utility model provides a lifting device, including a lifting drive mechanism and a testing mechanism. The testing mechanism includes a testing platform and a plurality of lifting mechanisms disposed at the bottom of the testing platform. The lifting mechanisms are arranged along the extension direction of the testing platform, and the lifting drive mechanism is connected to the testing platform.

[0008] The lifting mechanism includes a first connecting block, a second connecting block, and a connecting rod. The first connecting block is disposed on the test platform, the second connecting block is fixedly disposed below the test platform, and the two ends of the connecting rod are movably connected to the first connecting block and the second connecting block, respectively.

[0009] The lifting drive mechanism forms a preset angle with the plane where the test platform is located to drive the test platform to rise and fall.

[0010] As an improvement to the above solution, the preset included angle is an acute angle.

[0011] As an improvement to the above solution, the lifting mechanism further includes a movable component, the connecting rod is rotatably connected to the first connecting block through the movable component, and the connecting rod is rotatably connected to the second connecting block through the movable component.

[0012] As an improvement to the above solution, the moving part is a spherical bearing.

[0013] As an improvement to the above solution, the testing mechanism also includes a fixing mechanism mounted on the testing platform.

[0014] The fixing mechanism includes a clamping drive mechanism, a clamping linkage assembly, and a clamping assembly. The clamping drive mechanism drives the clamping assembly through the clamping linkage assembly to clamp or release the pipe fitting.

[0015] As an improvement to the above solution, the clamping linkage assembly includes a main rack, a linkage gear, and a driven rack, and the clamping assembly includes a main clamp and a driven clamp;

[0016] The clamping drive mechanism, the main clamp, and the main rack are connected in sequence, and the driven rack and the driven clamp are connected; the linkage gear is respectively meshed with the main rack and the driven rack.

[0017] As an improvement to the above solution, the testing mechanism also includes a blocking mechanism disposed on the testing platform, the blocking mechanism including a blocking drive mechanism and a plug connected to the blocking drive mechanism.

[0018] As an improvement to the above solution, the testing mechanism also includes a pick-and-place mechanism mounted on the testing platform.

[0019] The retrieval mechanism includes a retrieval frame and a retrieval drive mechanism, which are connected to the retrieval frame to drive the retrieval frame to rise and fall.

[0020] As an improvement to the above solution, the picking mechanism further includes a picking linkage component, which includes a picking gear, a picking rack, and a linkage rod. One end of the picking rack is connected to the picking frame, and the picking rack and the picking gear are meshed together. The linkage rod passes through the picking gear, and the linkage rod and the picking gear are circumferentially fixed.

[0021] Accordingly, this utility model also provides an airtight pressure testing machine, including a water tank and the above-mentioned lifting device, wherein the testing mechanism is located inside the water tank, and the second connecting block is fixedly connected to the bottom of the water tank.

[0022] The following are the beneficial effects of implementing this utility model:

[0023] This utility model's lifting device employs several lifting mechanisms to support the testing platform. These mechanisms are positioned along the platform's extension direction to prevent the platform from sagging or deforming due to lack of support in certain areas, thus avoiding interference with the loading / unloading and pressure testing processes. Because the lifting mechanisms effectively support the testing platform, only one lifting drive mechanism is needed to drive its movement. Compared to existing systems using two lifting drive mechanisms, this significantly reduces energy consumption and costs.

[0024] Specifically, the lifting mechanism includes a first connecting block, a second connecting block, and a connecting rod. The first connecting block is located on the test platform, and the second connecting block is fixedly located below the test platform. Both ends of the connecting rod are movably connected to the first and second connecting blocks, respectively. The second connecting block is located at the bottom of the water tank, and the connecting rod is vertically positioned inside the water tank, effectively supporting the test platform and preventing localized sagging and deformation. Simultaneously, the driving direction of the lifting drive mechanism forms a preset angle with the plane of the test platform. With the support of the lifting mechanism, the test platform moves in an inclined direction, and the connecting rod gradually tilts from a vertical state to a horizontal state, thereby lowering the test platform. The lifting mechanism also enables stable lifting and lowering of the test platform, saving energy consumption of the lifting drive mechanism and thus reducing costs. Attached Figure Description

[0025] Figure 1 This is a front view of the lifting device of this utility model;

[0026] Figure 2 yes Figure 1 Enlarged view of point A;

[0027] Figure 3 yes Figure 1 Top view;

[0028] Figure 4 yes Figure 3 Enlarged view of the organization;

[0029] Figure 5 yes Figure 3 Sectional view along line BB;

[0030] Figure 6 yes Figure 1 A three-dimensional image;

[0031] Figure 7 yes Figure 6 Enlarged view of point C;

[0032] Figure 8 This is a schematic diagram of the structure of the airtightness testing machine of this utility model. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0034] See Figure 1-8 This utility model discloses a lifting device, including a lifting drive mechanism 1 and a testing mechanism. The testing mechanism includes a testing platform 2 and a plurality of lifting mechanisms 3 disposed at the bottom of the testing platform 2. The lifting mechanisms 3 are arranged along the extension direction of the testing platform 2, and the lifting drive mechanism 1 is connected to the testing platform 2. Specifically, the lifting mechanisms 3 are spaced apart along the extension direction of the testing platform 2, and one end of the lifting drive mechanism 1 is connected to the testing platform 2.

[0035] The lifting mechanism 3 includes a first connecting block 31, a second connecting block 32, and a connecting rod 33. The first connecting block 31 is disposed on the test platform 2, the second connecting block 32 is fixedly disposed below the test platform 2, and the two ends of the connecting rod 33 are movably connected to the first connecting block 31 and the second connecting block 32, respectively.

[0036] The lifting drive mechanism 1 is driven at a preset angle α with the plane of the test platform 2, so as to drive the test platform 2 to rise and fall.

[0037] This utility model's lifting device employs several lifting mechanisms to support the testing platform. These mechanisms are positioned along the platform's extension direction to prevent the platform from sagging or deforming due to lack of support in certain areas, thus avoiding interference with the loading / unloading and pressure testing processes. Because the lifting mechanisms effectively support the testing platform, only one lifting drive mechanism is needed to drive its movement. Compared to existing systems using two lifting drive mechanisms, this significantly reduces energy consumption and costs.

[0038] Specifically, the lifting mechanism includes a first connecting block, a second connecting block, and a connecting rod. The first connecting block is located on the test platform, and the second connecting block is fixedly located below the test platform. Both ends of the connecting rod are movably connected to the first and second connecting blocks, respectively. The second connecting block is located at the bottom of the water tank, and the connecting rod is vertically positioned inside the water tank, effectively supporting the test platform and preventing localized sagging and deformation. Simultaneously, the driving direction of the lifting drive mechanism forms a preset angle with the plane of the test platform. With the support of the lifting mechanism, the test platform moves in an inclined direction, and the connecting rod gradually tilts from a vertical state to a horizontal state, thereby lowering the test platform. The lifting mechanism also enables stable lifting and lowering of the test platform, saving energy consumption of the lifting drive mechanism and thus reducing costs.

[0039] Preferably, such as Figure 2 As shown, the preset included angle α is an acute angle. More preferably, the preset included angle α is 30°-60°. More preferably, the preset included angle α is 45°, which makes the pushing or pulling of the lifting drive mechanism smoother, with minimal resistance and the lowest energy consumption.

[0040] Preferably, such as Figure 7 As shown, the lifting mechanism 3 also includes a movable component 34. The connecting rod 33 is rotatably connected to the first connecting block 31 via the movable component 34, and the connecting rod 33 is rotatably connected to the second connecting block 32 via the movable component 34. The movable component 34 is a spherical plain bearing. A spherical plain bearing is a type of spherical sliding bearing, whose sliding contact surface is an inner spherical surface and an outer spherical surface, allowing it to rotate and swing at any angle during movement. The spherical plain bearing reduces the rotational friction between the connecting rod and the first and second connecting blocks, ensuring smooth rotation and significantly reducing rotational resistance, thereby reducing drive energy consumption and cost.

[0041] Among them, such as Figure 1 , 3 As shown in Figures 6 and 8, the testing mechanism also includes a fixing mechanism 4 disposed on the testing platform 2. The fixing mechanism 4 is used to fix the pipe fitting 8 on the testing platform 2 to ensure that the pipe fitting will not move on the testing platform during the pressure test, thereby ensuring the smooth progress of the entire pressure test process.

[0042] like Figure 4 As shown, the fixing mechanism 4 includes a clamping drive mechanism 41, a clamping linkage assembly, and a clamping fixture assembly. The clamping drive mechanism 41 drives the clamping fixture assembly through the clamping linkage assembly to clamp or release the pipe fitting 8. There are several clamping fixture assemblies, allowing multiple pipe fittings to be fixed simultaneously on the test platform. The clamping drive mechanism synchronously drives multiple clamping fixture assemblies to move, achieving clamping or releasing of multiple pipe fittings at the same position. The clamping and fixing drive is preferably a cylinder.

[0043] Preferably, such as Figure 4 As shown, the clamping linkage assembly includes a main rack 42, a linkage gear 43, and a driven rack 44; the clamping assembly includes a main clamp 45 and a driven clamp 46; the clamping drive mechanism 41, the main clamp 45, and the main rack 42 are connected in sequence, and the driven rack 44 and the driven clamp 46 are connected; the linkage gear 43 is meshed with the main rack 42 and the driven rack 44 respectively.

[0044] Multiple main clamps are fixedly connected to a main rack, and a clamping drive mechanism is connected to one of the main clamps. The clamping drive mechanism drives one of the main clamps to move, causing the main rack and other main clamps to move synchronously. Simultaneously, the main rack drives a linkage gear to rotate, which in turn drives a driven rack and its associated clamps to move, causing the main clamps and associated clamps in each clamping assembly to move relative to each other, thus clamping the pipe fittings between them. When the clamping drive mechanism drives one of the main clamps to move in the opposite direction, according to the aforementioned linkage structure, the associated clamps also move in the opposite direction, increasing the distance between the main clamps and associated clamps in each set, thereby releasing the pipe fittings. This fixing mechanism enables synchronous clamping or releasing at the same position on each pipe fitting, featuring a simple, reliable structure and low energy consumption.

[0045] It should be noted that there are multiple fixing mechanisms 4, which are spaced apart along the extension direction of the test platform 2. They can fix the same pipe 8 at different positions to ensure that the pipe is stably fixed on the test platform.

[0046] Furthermore, such as Figure 1 , 3 As shown in Figures 6 and 8, the testing mechanism also includes a sealing mechanism 5 mounted on the testing platform 2. The sealing mechanism 5 is correspondingly positioned at the ports of the pipe fitting 8. The sealing mechanism is used to seal both ends of the pipe fitting. After sealing both ends of the pipe fitting, the lifting drive mechanism is controlled to lower the testing platform, immersing the pipe fitting in water. The function of the sealing mechanism is to prevent water from entering the pipe fitting.

[0047] Specifically, such as Figure 2 As shown, the sealing mechanism 5 includes a sealing drive mechanism 51 and a plug 52 connected to the sealing drive mechanism 51. The sealing drive mechanism 51 is preferably a cylinder. The sealing drive mechanism drives the plug closer to the pipe port to close the port, or drives the plug away from the pipe port.

[0048] It should be noted that there are two sealing mechanisms 5, located at both ends of the test platform 2, i.e., both ends of the pipe fitting, respectively sealing the two ends of the pipe fitting. Simultaneously, the combined action of the two sealing mechanisms clamps and fixes the pipe fitting. The sealing and fixing mechanisms work together to fix the pipe fitting both axially and radially, resulting in good, reliable, and stable fixation. One plug is connected to an air pipe, which communicates with the inside of the pipe fitting through the plug. The air pipe is connected to the pump body to inflate the pipe, achieving and maintaining a certain pressure to test for leaks. If a leak is found, the location of the leak can be determined by observing the position of the bubbles emerging from the pipe.

[0049] Furthermore, such as Figure 1 , 3As shown in Figures 6 and 8, the testing mechanism also includes a pick-and-place mechanism 6 mounted on the testing platform 2. The pick-and-place mechanism is used to assist in the automatic placement or removal of pipe fittings, achieving full automation of the airtightness pressure test.

[0050] like Figure 4-5 As shown, the picking mechanism 6 includes a picking frame 61 and a picking drive mechanism 62. The picking drive mechanism 62 is connected to the picking frame 61 to drive the picking frame 61 to rise and fall. The picking drive mechanism 61 is preferably a cylinder. The picking drive mechanism drives the picking frame to rise and fall. Specifically, all the pipes to be tested are first placed on the picking frame, then the picking drive mechanism drives the picking frame to fall, so that each pipe is placed between the main clamp and the slave clamp of the same set of clamping components. Finally, the clamping drive mechanism drives the main clamp and the slave clamp to move to clamp the pipe. After the test is completed, when it is necessary to remove the pipe, the clamping drive mechanism first drives the main clamp and the slave clamp to move to release the pipe, then the picking drive mechanism drives the picking frame to rise to lift the pipe, and then the pipe is removed manually or mechanically. This invention, through the setting of the picking mechanism, can accurately place each pipe fitting between the main clamp and the slave clamp of each set of clamping components, eliminating manual operation, reducing labor intensity, and improving testing efficiency.

[0051] Preferably, such as Figure 5 As shown, the picking mechanism 6 further includes a picking linkage assembly, which includes a picking gear 63, a picking rack 64, and a linkage rod 65. One end of the picking rack 64 is connected to the picking frame 61, and the picking rack 64 and the picking gear 63 are meshed together. The linkage rod 65 passes through the picking gear 63, and the linkage rod 65 and the picking gear 63 are circumferentially fixed.

[0052] It should be noted that, in order to ensure that the pipe fittings can be raised and lowered synchronously and stably, there are multiple pick-up and placement frames 61, and each pick-up and placement frame 61 is set up in a one-to-one correspondence with the fixing mechanism 4; there are multiple pick-up and placement linkage components, and each pick-up and placement linkage component is set up in a one-to-one correspondence with the pick-up and placement frame 61.

[0053] When the pick-up drive mechanism moves the pick-up frame, the pick-up frame moves the pick-up rack, which in turn drives the pick-up gear to rotate, causing the linkage rod to rotate. Since the linkage rod passes through all the pick-up gears, it simultaneously drives all the pick-up gears to rotate synchronously. The pick-up gears then drive the pick-up rack, which meshes with them, thus causing all the pick-up frames to move synchronously. Therefore, only one pick-up drive mechanism and one linkage rod are needed to achieve synchronous movement of multiple pick-up frames, resulting in a simple structure, low energy consumption, and low cost.

[0054] Accordingly, see Figure 8This utility model also discloses an airtightness testing machine, including a water tank 7 and the aforementioned lifting device. The testing mechanism is located inside the water tank 7, and the second connecting block 32 is fixedly connected to the bottom of the water tank 7. The testing mechanism is located inside the water tank, and the second connecting block is fixedly located at the bottom of the water tank, which is filled with water. When the lifting drive mechanism drives the testing platform to rise, the pipe is exposed above the water surface; when the lifting drive mechanism drives the testing platform to fall, the pipe is immersed in the water. The lifting drive mechanism is mounted outside the water tank via a frame. The specific structure of the lifting device is as described above and will not be repeated here.

[0055] In summary, this utility model provides a lifting device and an airtight pressure testing machine to prevent deformation and reduce costs.

[0056] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A lifting device, characterized in that, It includes a lifting drive mechanism and a testing mechanism. The testing mechanism includes a testing platform and several lifting mechanisms located at the bottom of the testing platform. The lifting mechanisms are arranged along the extension direction of the testing platform, and the lifting drive mechanism is connected to the testing platform. The lifting mechanism includes a first connecting block, a second connecting block, and a connecting rod. The first connecting block is disposed on the test platform, the second connecting block is fixedly disposed below the test platform, and the two ends of the connecting rod are movably connected to the first connecting block and the second connecting block, respectively. The lifting drive mechanism forms a preset angle with the plane where the test platform is located to drive the test platform to rise and fall.

2. The lifting device as described in claim 1, characterized in that, The preset included angle is an acute angle.

3. The lifting device as described in claim 1, characterized in that, The lifting mechanism also includes a movable component, the connecting rod is rotatably connected to the first connecting block through the movable component, and the connecting rod is rotatably connected to the second connecting block through the movable component.

4. The lifting device as described in claim 3, characterized in that, The moving part is a spherical bearing.

5. The lifting device as described in claim 1, characterized in that, The testing mechanism also includes a fixing mechanism mounted on the testing platform. The fixing mechanism includes a clamping drive mechanism, a clamping linkage assembly, and a clamping assembly. The clamping drive mechanism drives the clamping assembly through the clamping linkage assembly to clamp or release the pipe fitting.

6. The lifting device as described in claim 5, characterized in that, The clamping linkage assembly includes a main rack, a linkage gear, and a driven rack; the clamping assembly includes a main clamp and a driven clamp. The clamping drive mechanism, the main clamp, and the main rack are connected in sequence, and the driven rack and the driven clamp are connected; the linkage gear is respectively meshed with the main rack and the driven rack.

7. The lifting device as described in claim 1, characterized in that, The testing mechanism also includes a blocking mechanism mounted on the testing platform, the blocking mechanism including a blocking drive mechanism and a plug connected to the blocking drive mechanism.

8. The lifting device as described in claim 1, characterized in that, The testing mechanism also includes a pick-and-place mechanism mounted on the testing platform. The retrieval mechanism includes a retrieval frame and a retrieval drive mechanism, which are connected to the retrieval frame to drive the retrieval frame to rise and fall.

9. The lifting device as described in claim 8, characterized in that, The picking mechanism further includes a picking linkage component, which includes a picking gear, a picking rack, and a linkage rod. One end of the picking rack is connected to the picking frame, and the picking rack and the picking gear are meshed together. The linkage rod passes through the picking gear, and the linkage rod and the picking gear are circumferentially fixed.

10. An airtightness testing machine, characterized in that, It includes a water tank and a lifting device as described in any one of claims 1-9, wherein the testing mechanism is disposed inside the water tank, and the second connecting block is fixedly connected to the bottom of the water tank.

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