A water outlet pipe assembly automatic detection device

Abstract

The application belongs to the technical field of water outlet pipe air tightness detection, and discloses a water outlet pipe assembly air tightness automatic detection device, which comprises a workbench, an automatic plugging unit, an air tightness detection unit, a square plate, a PLC control panel and an adjustable clamping assembly. A mounting plate is fixedly installed at the middle position of the upper end of the workbench, electric cylinders are fixedly installed at the two ends of the mounting plate, and the PLC control panel is fixedly installed on one side of the mounting plate. The square plate is fixedly installed at the output end of the electric cylinder, a sliding groove is formed at the middle position of one end of the square plate, square grooves are formed at the two sides of the one end of the square plate, the device can adapt to the outer dimensions of water outlet pipe assemblies with different pipe diameters, can lock the swing angle of the clamping plate, can adjust the position of the sliding plate in the sliding groove, can stably clamp water outlet pipe assemblies with different pipe diameters, does not need to replace clamps, solves the problems of complicated operation, time consumption and labor intensity of the traditional mode, and greatly improves the adaptive flexibility of the device to workpieces with multiple specifications.

Description

Technical Field

[0001] This utility model relates to the field of water outlet pipe air tightness testing technology, and in particular to an automatic testing device for water outlet pipe assembly air tightness. Background Technology

[0002] In the fields of automobiles, home appliances, and plumbing equipment, the water outlet pipe assembly is a core component of the fluid transport system. Its airtightness directly determines the safety and reliability of the equipment. Existing technologies often use automatic airtightness testing devices for water outlet pipe assemblies to perform airtightness testing.

[0003] Chinese utility model patent CN218155909U discloses an engine water outlet pipe inspection tool, belonging to the field of water outlet pipe inspection technology. It addresses the problem that existing methods for testing the airtightness and diameter of engine water outlet pipes are mostly performed by different tools and personnel, increasing labor costs and reducing efficiency. The tool includes: an automatic air pump; a transmission screw rotatably connected to the front side of the top of the automatic air pump; a limit detection rod fixedly connected to the rear side of the top of the automatic air pump; two sets of transmission adjustment plates slidably connected to the left and right sides of the upper ends of the transmission screw and the limit detection rod; and two sets of length adjustment rods respectively located on the outer sides of the upper ends of the two sets of transmission adjustment plates. This utility model simultaneously performs airtightness testing and maximum diameter detection of the engine water outlet pipe, significantly shortening the inspection time and improving efficiency.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: In the actual testing operation of the automatic testing device for the airtightness of water pipe assemblies, when performing fixed testing on water pipe assemblies of different diameters, the conventional approach is to achieve adaptation by changing the fixture. However, this method is cumbersome, time-consuming, and labor-intensive, and the device has poor adaptability to multiple specifications of workpieces, making it difficult to meet the high-efficiency testing needs of small batches and multiple varieties. Utility Model Content

[0005] To address the aforementioned issues, this invention provides an automatic airtightness detection device for water outlet pipe assemblies, which facilitates the clamping and fixing of water outlet pipe assemblies with different diameters.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an automatic detection device for the air tightness of a water outlet pipe assembly, comprising a workbench, an automatic sealing unit, an air tightness detection unit, a square plate, a PLC control panel, and an adjustable clamping assembly; An installation plate is fixedly installed at the middle position of the upper end of the workbench, and electric cylinders are fixedly installed at both ends of the installation plate; The automatic sealing unit is fixedly installed on both sides of the upper end of the workbench; The airtightness detection unit is installed on one side of the automatic sealing unit; The PLC control panel is fixedly installed on one side of the mounting plate; The square plate is fixedly installed at the output end of the electric cylinder. A sliding groove is provided in the middle of one end of the square plate, and square grooves are provided on both sides of one end of the square plate. The adjustable clamping assembly includes: The clamping plate is hinged to the square groove via a hinge rod; An arc-shaped tube is fixedly installed on both sides of one end of the square plate. An arc-shaped rod is inserted into the arc-shaped tube. One end of the arc-shaped rod is fixedly connected to the clamping plate. An arc-shaped spring is fixedly installed inside one end of the arc-shaped tube. The other end of the arc-shaped spring is fixedly connected to the arc-shaped rod. A sliding plate is slidably installed within the sliding groove.

[0007] Furthermore, the electric cylinder is electrically connected to the PLC control panel.

[0008] By adopting the above technical solution, the electric cylinder can be controlled.

[0009] Furthermore, guide rods are inserted into both ends of the mounting plate, and one end of the guide rod is fixedly connected to the square plate.

[0010] By adopting the above technical solution, the square plate can be moved smoothly.

[0011] Furthermore, a first positioning screw is rotatably mounted on the outer side of the arc-shaped tube, and a first screw hole matching the specification of the first positioning screw is opened in a circumferential array on the outer side of the arc-shaped tube, and the threaded end of the first positioning screw is screwed into the first screw hole.

[0012] The arc-shaped rod is fixed by adopting the above technical solution.

[0013] Furthermore, a buffer pad is fixedly installed at one end of both the clamping plate and the sliding plate.

[0014] The above-mentioned technical solution is used to protect the water outlet pipe.

[0015] Furthermore, the cushioning pad is made of rubber.

[0016] By adopting the above technical solutions, the clamping force is improved.

[0017] Furthermore, the square plate is rotatably mounted with second positioning screws at both ends, and the sliding plate has second screw holes at both ends that match the specifications of the second positioning screws, with the threaded end of the second positioning screw screw screwed into the second screw hole.

[0018] By adopting the above technical solution, the sliding plate can be fixed.

[0019] Furthermore, a placement plate is symmetrically installed on the upper end of the workbench, and a placement groove is opened at one end of the placement plate.

[0020] The above-mentioned technical solution is used to place the water outlet pipe.

[0021] In summary, this utility model has the following beneficial effects: In this application, the device replaces the traditional fixed clamp with an adjustable clamping assembly. The clamping plate swings using a hinged rod, which can adapt to the external dimensions of water pipe assemblies with different diameters. At the same time, by screwing the first positioning screw into the first screw hole at different positions of the arc rod, the swing angle of the clamping plate can be locked. Combined with the position adjustment of the sliding plate in the sliding groove, stable clamping of water pipe assemblies with different diameters can be achieved without changing the clamp. This solves the problems of cumbersome operation, time and labor consumption in the traditional method, and greatly improves the device's adaptability to workpieces of multiple specifications. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a top view of an embodiment of the present utility model. Figure 3 This is a schematic diagram of the electric cylinder connection structure according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the square plate connection structure according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the adjustable clamping component structure according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the sliding plate structure according to an embodiment of the present invention.

[0023] In the diagram: 1. Workbench; 2. Square plate; 3. PLC control panel; 4. Adjustable clamping assembly; 401. Clamping plate; 402. Arc-shaped tube; 403. Arc-shaped rod; 404. Arc-shaped spring; 405. Sliding plate; 5. Mounting plate; 6. Electric cylinder; 7. Sliding groove; 8. Square groove; 9. Guide rod; 10. First positioning screw; 11. First screw hole; 12. Second positioning screw; 13. Second screw hole; 14. Placement plate. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] like Figures 1-6 As shown in the figure, this application discloses an automatic airtightness detection device for a water outlet pipe assembly, including a workbench 1, an automatic sealing unit, an airtightness detection unit, a square plate 2, a PLC control panel 3, and an adjustable clamping assembly 4.

[0026] A mounting plate 5 is fixedly installed at the middle position of the upper end of the workbench 1. Electric cylinders 6 are fixedly installed at both ends of the mounting plate 5. The electric cylinders 6 are electrically connected to the PLC control panel 3. Guide rods 9 are inserted into both ends of the mounting plate 5. One end of the guide rods 9 is fixedly connected to the square plate 2. Placement plates 14 are symmetrically installed on the upper end of the workbench 1. Placement slots are opened at one end of the placement plates 14.

[0027] The automatic sealing unit is fixedly installed on both sides of the upper end of the workbench 1. The automatic sealing unit is an existing structure, including a sealing cylinder and a sealing head. The piston rod of the sealing cylinder is connected to the sealing head. The end face of the sealing head is provided with an elastic sealing gasket, which can be adapted to the interface size of different specifications of water outlet pipes. The sealing head has an internal air passage, which is connected to the pipeline of the airtightness detection unit to realize the integration of sealing and air passage.

[0028] The airtightness detection unit is installed on one side of the automatic sealing unit. The airtightness detection unit is an existing device, including an air source, a pressure regulating valve, a pressure sensor, and a flow sensor. The air source adjusts the pressure of the detection medium (compressed air) to a preset value through the pressure regulating valve. The pressure sensor is installed in the ventilation channel to monitor the pressure change inside the water outlet pipe assembly in real time. If the pressure drop rate exceeds the preset threshold, the airtightness is judged to be unqualified. The flow sensor is used to assist in monitoring minute leaks and improve detection accuracy.

[0029] The PLC control panel 3 is fixedly installed on one side of the mounting plate 5.

[0030] The square plate 2 is fixedly installed at the output end of the electric cylinder 6. A sliding groove 7 is provided in the middle of one end of the square plate 2, and square grooves 8 are provided on both sides of one end of the square plate 2.

[0031] like Figure 5 and Figure 6 As shown, the adjustable clamping assembly 4 includes: The clamping plate 401 is hinged to the square groove 8 via a hinge rod; An arc-shaped tube 402 is fixedly installed on both sides of one end of a square plate 2. An arc-shaped rod 403 is inserted into the arc-shaped tube 402. One end of the arc-shaped rod 403 is fixedly connected to a clamping plate 401. An arc-shaped spring 404 is fixedly installed at one end inside the arc-shaped tube 402. The other end of the arc-shaped spring 404 is fixedly connected to the arc-shaped rod 403. A first positioning screw 10 is rotatably installed on the outside of the arc-shaped tube 402. A first screw hole 11 matching the specification of the first positioning screw 10 is opened in a circumferential array on the outside of the arc-shaped rod 403. The threaded end of the first positioning screw 10 is screwed into the first screw hole 11. The sliding plate 405 is slidably installed in the sliding groove 7. A buffer pad, made of rubber, is fixedly installed at one end of both the clamping plate 401 and the sliding plate 405. Second positioning screws 12 are rotatably installed at both ends of the square plate 2. Second screw holes 13, matching the specifications of the second positioning screws 12, are opened at both ends of the sliding plate 405. The threaded end of the second positioning screw 12 is screwed into the second screw hole 13. In use, the first positioning screw 10 on the outside of the arc-shaped tube 402 is manually loosened to release the connection between the arc-shaped tube 402 and the first positioning screw 10. 03 is locked in place; at this time, the arc rod 403 is pulled and slides along the arc trajectory inside the arc tube 402, causing the clamping plate 401 hinged in the square groove 8 to swing around the hinge point until the inner distance between the two clamping plates 401 is completely matched with the pipe diameter of the water outlet pipe assembly; after adjustment, the first positioning screw 10 is screwed back into the first screw hole 11 at the corresponding position of the arc rod 403 to complete the locking of the swing angle of the clamping plate 401, ensuring that the clamping plate 401 can fit against the outer wall of the workpiece. Then, the second positioning screws 12 at both ends of the square plate 2 are loosened, and the sliding plate 405 is pushed to slide horizontally in the sliding groove 7. The position of the sliding plate 405 is adjusted so that one end is in close contact with the water outlet pipe assembly. After adjustment, the second positioning screw 12 is tightened so that its threaded end is screwed into the second screw hole 13 at the corresponding position of the sliding plate 405 to complete the position locking of the sliding plate 405. After adjustment, the rubber buffer pads at the ends of the clamping plate 401 and the sliding plate 405 are tightly fitted to the outer wall of the water outlet pipe assembly. The arc spring 404 inside the arc tube 402 is in a slightly compressed state, providing continuous and uniform elastic support force for the clamping plate 401, which increases the stability of workpiece clamping. This enables stable clamping of water outlet pipe assemblies with different pipe diameters without the need to change the clamps, solving the problems of cumbersome operation, time and labor consumption in traditional methods, and greatly improving the device's adaptability to workpieces of various specifications.

[0032] The operating principle of the automatic airtightness testing device for a water outlet pipe assembly in this embodiment is as follows: The operator places the water outlet pipe assembly to be tested stably in the placement groove of the placement plate 14 symmetrically installed on the upper end of the workbench 1. The groove shape is adapted to the basic shape of the water outlet pipe assembly, which can play a preliminary limiting and supporting role for the workpiece, ensuring that the axis of the water outlet pipe assembly is in the same straight line as the axis of the sealing head of the automatic sealing unit on both sides of the workbench 1. This provides a precise reference for subsequent clamping, fixing and sealing, avoiding sealing failure or detection error due to workpiece offset. The adjustable clamping component 4 is manually adjusted according to the pipe diameter and length of the water outlet pipe assembly to be tested.

[0033] The operator issues a start command via PLC control panel 3. Upon receiving the signal, electric cylinder 6, electrically connected to PLC control panel 3, begins operation, smoothly moving the square plate 2 towards the water outlet pipe assembly. During this process, guide rods 9, inserted at both ends of mounting plate 5, slide synchronously with the square plate 2, effectively limiting its displacement trajectory and preventing deviation or wobbling. Then, PLC control panel 3 controls the automatic sealing unit to ensure complete contact between the two ends of the water outlet pipe assembly and the sealing heads of the automatic sealing unit. After sealing the two ends of the water outlet pipe assembly, the airtightness detection unit activates, injecting dry compressed air at a preset pressure into the water outlet pipe assembly through a pre-set air passage inside the sealing head. After inflation, the system enters the pressure holding stage, the pressure holding time of which can be freely set via PLC control panel 3. During the pressure holding process, the pressure sensor and flow sensor built into the airtightness detection unit monitor the pressure changes and gas flow rate inside the water outlet pipe assembly in real time, and transmit the monitoring data to the PLC control panel 3 in real time. The PLC control panel 3 compares and analyzes the monitoring data with the preset threshold range: if the pressure drop rate is less than or equal to the preset threshold and the gas leakage is within the acceptable range, the airtightness of the water outlet pipe assembly is deemed acceptable; if the pressure drop rate exceeds the preset threshold or the gas leakage exceeds the standard, it is deemed unacceptable, and the PLC control panel 3 will automatically record the detection data and trigger an alarm.

[0034] After the testing process is completed, the PLC control panel 3 automatically issues a command to control the automatic sealing unit to depressurize and reset the sealing head, thus releasing the seal on the water outlet pipe assembly; at the same time, the electric cylinder 6 is started to run in reverse, driving the square plate 2 back to its initial position, releasing the clamping and fixing of the workpiece, and the operator can take out the tested water outlet pipe assembly, and then carry out the testing operation of the next batch of water outlet pipe assemblies.

[0035] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An automatic detection device for the airtightness of a water outlet pipe assembly, characterized in that: It includes a workbench (1), an automatic sealing unit, an airtightness detection unit, a square plate (2), a PLC control panel (3), and an adjustable clamping assembly (4). An installation plate (5) is fixedly installed at the middle position of the upper end of the workbench (1), and electric cylinders (6) are fixedly installed at both ends of the installation plate (5). The automatic sealing unit is fixedly installed on both sides of the upper end of the workbench (1); The airtightness detection unit is installed on one side of the automatic sealing unit; The PLC control panel (3) is fixedly installed on one side of the mounting plate (5); The square plate (2) is fixedly installed at the output end of the electric cylinder (6). A sliding groove (7) is provided in the middle of one end of the square plate (2), and square grooves (8) are provided on both sides of one end of the square plate (2). The adjustable clamping assembly (4) includes: The clamping plate (401) is hinged to the square groove (8) by a hinge rod; An arc-shaped tube (402) is fixedly installed on both sides of one end of the square plate (2). An arc-shaped rod (403) is inserted into the arc-shaped tube (402). One end of the arc-shaped rod (403) is fixedly connected to the clamping plate (401). An arc-shaped spring (404) is fixedly installed at one end inside the arc-shaped tube (402). The other end of the arc-shaped spring (404) is fixedly connected to the arc-shaped rod (403). The sliding plate (405) is slidably installed in the sliding groove (7).

2. The automatic airtightness detection device for the water outlet pipe assembly according to claim 1, characterized in that: The electric cylinder (6) is electrically connected to the PLC control panel (3).

3. The automatic airtightness detection device for the water outlet pipe assembly according to claim 1, characterized in that: The mounting plate (5) has guide rods (9) inserted at both ends, and one end of the guide rod (9) is fixedly connected to the square plate (2).

4. The automatic airtightness detection device for the water outlet pipe assembly according to claim 1, characterized in that: The outer side of the arc-shaped tube (402) is rotatably mounted with a first positioning screw (10), and the outer side of the arc-shaped tube (403) is provided with a first screw hole (11) matching the specification of the first positioning screw (10) in a circumferential array. The threaded end of the first positioning screw (10) is screwed into the first screw hole (11).

5. The automatic airtightness detection device for the water outlet pipe assembly according to claim 1, characterized in that: A buffer pad is fixedly installed at one end of both the clamping plate (401) and the sliding plate (405).

6. The automatic airtightness detection device for the water outlet pipe assembly according to claim 5, characterized in that: The cushioning pad is made of rubber.

7. The automatic airtightness detection device for the water outlet pipe assembly according to claim 1, characterized in that: The square plate (2) is rotatably mounted with a second positioning screw (12) at both ends. The sliding plate (405) has a second screw hole (13) at both ends that matches the specifications of the second positioning screw (12). The threaded end of the second positioning screw (12) is screwed into the second screw hole (13).

8. The automatic airtightness detection device for the water outlet pipe assembly according to claim 1, characterized in that: The workbench (1) is symmetrically equipped with placement plates (14) on its upper end, and a placement groove is provided at one end of the placement plate (14).

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