Pipe joint air tightness detection machine

Abstract

The application discloses a kind of pipe fittings air tightness detection machine, including rack, PLC controller and touch screen, two pressure measuring mechanisms are equipped on rack, pressure measuring mechanism includes rotatable clamp assembly and several pressure measuring components, pressure measuring component includes the upper seal pressure measuring component, side seal pressure measuring component, bottom seal pressure measuring component with corresponding connection air inlet pipe, air inlet pipe is equipped with pressure sensor and air inlet switch, recovery mechanism is set below pressure measuring mechanism, the output end of the analog operating panel of touch screen is electrically connected with the input end of PLC controller, the output end of the touch panel of touch screen is electrically connected with the input end of pressure sensor, the output end of PLC controller is electrically connected with the input end of each group pressure measuring component and its air inlet switch.The application is in touch screen by setting analog operating panel of simulating different model pipe fittings air tightness detection, according to pipe fitting model selection corresponding analog operating panel, press start button device and immediately start running, without tedious setting process, high in humanity.

Description

Technical Field

[0001] This invention relates to the field of pipe fitting testing technology, and specifically to a pipe fitting airtightness testing machine. Background Technology

[0002] Pipe fittings are a general term for components in a pipeline system that serve functions such as connection, control, direction change, flow diversion, sealing, and support. After the pipe fittings are manufactured, their airtightness needs to be tested to prevent leakage during use. Currently, the airtightness of pipe fittings is generally tested using specialized testing equipment.

[0003] However, existing pipe fitting air tightness testing equipment is cumbersome and not user-friendly in operation. It is only suitable for testing one or two types of pipe fittings and cannot meet the testing requirements of different pipe fittings. Moreover, it can only test a small number of pipe fittings and has low testing efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a pipe fitting air tightness testing machine that meets the testing requirements of pipe fittings of different specifications and improves testing efficiency.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A pipe fitting air tightness testing machine, comprising: The frame includes a rear support and a bottom support. The bottom front side of the bottom support and the bottom rear side of the rear support are symmetrically provided with casters and liftable support feet. The rear support is equipped with a pneumatic valve control box and a main control box through a mounting panel. The main control box is located on top of the pneumatic valve control box. The bottom support is equipped with a collection box through a mounting panel. The rear side of the pneumatic valve control box and the main control box, and the front side of the collection box are all provided with box doors. The support panel has two supports, which are symmetrically arranged at both ends of the top of the collection box. The support panels are located on the front side of the mounting panel between the pneumatic valve control box and the main control box. A recycling port is provided between the two support panels and the recycling port is connected to the collection box. The pressure testing mechanism comprises two components, symmetrically arranged between two support panels via two support columns and connected by a connecting column. Each pressure testing mechanism includes a rotatable clamp assembly, an upper sealing pressure testing assembly, a side sealing pressure testing assembly, a bottom sealing pressure testing assembly, and a height adjustment assembly. Several upper sealing pressure testing assemblies, side sealing pressure testing assemblies, and bottom sealing pressure testing assemblies are provided, each corresponding to the other to form a group of pressure testing assemblies. Several upper sealing pressure testing assemblies are positioned directly above the rotatable clamp assembly. The rotatable clamp assembly is rotatably set and used to fix multiple pipe fittings. Each pipe fitting corresponds to a set of pressure testing components. The top sealing pressure testing component, the side sealing pressure testing component, and the bottom sealing pressure testing component are respectively connected to the first air inlet pipe, the second air inlet pipe, and the third air inlet pipe. The first air inlet pipe, the second air inlet pipe, and the third air inlet pipe are all equipped with pressure sensors and air inlet switches. The first air inlet pipe, the second air inlet pipe, and the third air inlet pipe are connected to one end of the main air pipe. The other end of the main air pipe is connected to the air storage tank. The main air pipe is equipped with a booster cylinder. The height adjustment component is used to adjust the height of the side sealing pressure testing component. The recycling mechanism has two parts, which are located directly below the pressure testing mechanism and correspond one-to-one with the two pressure testing mechanisms. The two recycling mechanisms are symmetrically arranged in the collection box, and the collection box has discharge ports at both ends. The recycling mechanism is used to collect and recycle the pipe fittings that fail the test by the corresponding pressure testing mechanism and discharge the pipe fittings that fail the test from the discharge port. The control mechanism includes a PLC controller housed in the main control box, a booster cylinder start button and a booster cylinder pressure setting button located on the front of the main control box, a touch screen, and start, stop, and reset buttons located on the pressure measuring mechanism. The outputs of the start, stop, and reset buttons are electrically connected to the inputs of the touch screen. The touch screen contains a simulated operation panel for simulating the airtightness testing of different types of pipe fittings, an alarm indicator, and a touch panel. The output of each simulated operation panel is electrically connected to the input of the PLC controller. The output of the touch panel is electrically connected to the input of the booster cylinder pressure setting button and the pressure sensors of the first, second, and third air inlet pipes. The input of the touch panel is electrically connected to the output of the alarm indicator. The output of the PLC controller is electrically connected to each pressure measuring component, the air inlet switches of the first, second, and third air inlet pipes of each pressure measuring component, and the input of the booster cylinder.

[0006] As a preferred technical solution of the present invention, the rotatable clamp assembly includes a ball bearing disposed on a support plate on the side of the connecting column away from the support panel, a rotating shaft rotatably connected to the ball bearing, a cylinder sleeved on one side of the rotating shaft, the top of the cylinder being connected to the clamp, and the other side being connected to a second drive motor, the input end of the second drive motor being electrically connected to the output end of the PLC controller.

[0007] As a preferred technical solution of the present invention, the connecting column is provided with support plates on the side away from the support panel and on both sides of the connecting column. The pressure measuring mechanism is located between the two support plates on the same side, and an upwardly open material box is provided between the two support plates on the same side. The material box is located in front of the rotatable clamp assembly and is used to load and unload qualified pipe fittings. The material box is located inside the collection box.

[0008] As a preferred technical solution of the present invention, a first connecting plate is horizontally arranged between the two support plates on the same side, and a plurality of upper sealing pressure testing components are arranged on the first connecting plate. The upper sealing pressure testing components include an upper sealing cylinder. The piston rod of the upper sealing cylinder passes through the first connecting plate and is connected to the upper sealing head. The upper sealing head has a first air inlet on its side and a first air outlet at its bottom. The first air inlet and the first air outlet are connected, and a first air inlet pipe is connected to the first air inlet.

[0009] As a preferred technical solution of the present invention, the height adjustment component includes two guide rails, which are respectively arranged on opposite sides of the two support plates on the same side. A slider is slidably connected to the guide rail, and a vertical second connecting plate is provided between the two sliders. The second connecting plate is located directly below the first connecting plate. The side sealing pressure measuring component is provided on the second connecting plate. The side sealing pressure measuring component includes a plurality of side sealing cylinders. The piston rod of the side sealing cylinder passes through the second connecting plate and is connected to the side sealing head. The side of the side sealing head is provided with a second air inlet, and the bottom of the side sealing head is provided with a second air outlet. The second air inlet and the second air outlet are connected, and a second air inlet pipe is connected to the second air inlet.

[0010] As a preferred technical solution of the present invention, the two support plates on the same side are provided with fixing blocks on opposite sides at the bottom of the guide rail. A vertical third connecting plate is provided between the two fixing blocks. The bottom sealing pressure measuring assembly is provided on the third connecting plate. The bottom sealing pressure measuring assembly includes several bottom sealing cylinders. The piston rod of the bottom sealing cylinder passes through the third connecting plate and is connected to the bottom sealing head. The side of the bottom sealing head is provided with a third air inlet, and the bottom of the bottom sealing head is provided with a third air outlet. The third air inlet and the third air outlet are connected, and a third air inlet pipe is connected to the second air inlet.

[0011] As a preferred technical solution of the present invention, the height adjustment assembly further includes a flange-type guide shaft support fixed to the side of the second connecting plate. The flange-type guide shaft support is threadedly connected to a long threaded rod. The long threaded rod passes through the first connecting plate and is connected to the handwheel. The end of the long threaded rod connected to the handwheel is provided with a seated bearing.

[0012] As a preferred technical solution of the present invention, the first connecting plate is provided with a vertical elongated plate, and the start button, stop button and reset button are provided on the vertical elongated plate.

[0013] As a preferred embodiment of the present invention, the recycling mechanism includes a conveying assembly installed inside a collection box. The conveying assembly includes a drive wheel, a driven wheel, and a conveyor belt between the drive wheel and the driven wheel. The driven wheel is located at the discharge port, and the discharge port is provided with an inclined discharge trough. A collection trough is located directly above the conveyor belt. The collection trough is located on the inner wall of the collection box, and a mounting plate is connected to the bottom of the collection trough. A first drive motor is mounted on the mounting plate. The shaft of the first drive motor is connected to a drive wheel. The drive wheel and the drive wheel are driven by a synchronous belt. The input end of the first drive motor is electrically connected to the output end of the discharge control button.

[0014] As a preferred embodiment of the present invention, the touch panel includes a booster cylinder pressure value display panel and multiple pressure change value display panels, measured leakage value display panels, and test result display panels. Each pressure change value display panel, measured leakage value display panel, and test result display panel corresponds to a set of pressure measuring components. The output terminal of the booster cylinder pressure value display panel is electrically connected to the input terminal of the booster cylinder pressure setting button. The input terminal of the booster cylinder pressure value display panel is electrically connected to the output terminal of the PLC controller. The output terminal of the pressure change value display panel is electrically connected to the input terminals of the pressure sensors of the first, second, and third air inlets of each set of pressure measuring components. The output terminal of the measured leakage value display panel is electrically connected to the input terminal of the pressure change value display panel.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention sets up a control mechanism, which includes a touch screen and a PLC controller. The touch screen is equipped with a simulation operation panel for simulating the air tightness test of different types of pipe fittings. The output terminal of each simulation operation panel is electrically connected to the input terminal of the PLC controller. The pipe fitting model to be tested is selected in advance on the simulation operation panel. When the start button is pressed, the PLC controller controls the corresponding upper sealing cylinder, side sealing cylinder or bottom sealing cylinder and the corresponding first air inlet pipe, second air inlet pipe or third air inlet pipe to work according to the command of the simulation operation panel of the pipe fitting model. The automatic mode / manual mode start-up mode does not require a complicated setting process, so that the testing machine can be started and used. The air inlet switch of the air inlet pipe connected to one of the pipe ports is opened, and the booster cylinder sends the gas in the storage tank to the pipe fitting. If the pressure sensor of the outlet pipe connected to the other pipe port detects the pressure change value If the calculated measured leakage value is not greater than the preset threshold, it proves that the pipe fitting is airtight and is a qualified pipe fitting. Qualified pipe fittings are collected into the material box. If the measured leakage value calculated by the pressure change value detected by the pressure sensor of the outlet pipe connected to the other pipe port is greater than the preset threshold, it proves that the pipe fitting is airtight and is a substandard pipe fitting. The PLC controller controls the pipe fitting to release the clamp and then controls the second drive motor to start. The second drive motor drives the cylinder to rotate. The rotation of the cylinder causes the substandard pipe fitting on the clamp to pass through the recovery port and be unloaded onto the conveyor belt. The PLC controller controls the second drive motor to start. The second drive motor drives the conveyor belt to move and send the substandard pipe fitting to the discharge port for collection, thereby realizing the detection of the airtightness of the pipe fitting and separating the leaking pipe fitting. Moreover, the pressure sensor of the inlet pipe is used to detect the pressure. When the pressure change value reaches the preset maximum value, it triggers the detection machine to stop the detection to avoid the risk of overpressure and save energy.

[0016] (2) The present invention sets up a control mechanism, which also includes a booster cylinder start button and a booster cylinder pressure setting button. The touch screen is equipped with a touch panel, which includes a booster cylinder pressure value display panel and multiple pressure change value display panels, measured leakage value display panels and test result display panels. This allows the operator to set the booster cylinder pressure before ventilation and observe the internal pressure change of the pipe fitting, the measured leakage value and the final test result after ventilation. The result data is displayed in a user-friendly way, which is convenient for the operator to continuously process a large number of pipe fittings.

[0017] (3) The present invention is provided with several upper sealing pressure testing components, side sealing pressure testing components and bottom sealing pressure testing components. The upper sealing pressure testing components, side sealing pressure testing components and bottom sealing pressure testing components are set up in a corresponding group. The rotatable clamp assembly can fix multiple pipe fittings. Each pipe fitting corresponds to a group of pressure testing components, so that the testing machine can test the air tightness of multiple pipe fittings at the same time. Moreover, by setting a height adjustment component, the height of several side sealing pressure testing components can be adjusted to meet the air tightness testing of pipe fittings of different specifications. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is one of the overall structural diagrams of this embodiment.

[0020] Figure 2 This is the second schematic diagram of the overall structure of this embodiment.

[0021] Figure 3 This is a schematic diagram of the rack structure in this embodiment.

[0022] Figure 4 This is one of the schematic diagrams of the pressure measuring mechanism in this embodiment.

[0023] Figure 5 This is the second schematic diagram of the pressure measuring mechanism in this embodiment.

[0024] Figure 6 This describes the control principle of the control mechanism in this embodiment.

[0025] In the diagram: Frame 1, Rear support 101, Bottom support 102, Rotatable clamp assembly 2, Ball bearing 201, Cylinder 202, Clamp 203, Second drive motor 204, Upper sealing pressure testing assembly 3, Upper sealing cylinder 301, Upper sealing head 302, Side sealing pressure testing assembly 4, Side sealing cylinder 401, Side sealing head 402, Bottom sealing pressure testing assembly 5, Bottom sealing cylinder 501, Bottom sealing head 502, Height adjustment assembly 6, Guide rail 601, Slider 602, Flange-type guide shaft support 603, Long threaded rod 604, Handwheel 605, Discharge port 7, Conveying assembly 8, Driven wheel 801, Driven wheel 802 2. Conveyor belt 803, first drive motor 804, drive wheel 805, synchronous belt 806, pneumatic valve control box 9, support panel 10, main control box 11, collection box 12, caster wheel 13, support foot 14, recovery port 15, support column 16, connecting column 17, booster cylinder start button 18, booster cylinder pressure setting button 19, touch screen 20, start button 21, stop button 22, reset button 23, box door panel 24, support plate 25, material box 26, first connecting plate 27, second connecting plate 28, fixing block 29, third connecting plate 30, vertical long plate 31, discharge chute 32, collection chute 33, mounting plate 34. Detailed Implementation

[0026] 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, but this does not constitute a limitation on the scope of protection of the present invention.

[0027] In this invention, for clarity, the following description is provided: The observer faces the attached... Figure 1 In this observation, the left side of the observer is designated as front, the right side as rear, the front of the observer as right, the rear of the observer as left, the top of the observer as up, and the bottom of the observer as down. It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" used in this document indicate orientations or positional relationships based on the accompanying drawings. These are merely for the purpose of clearly describing the invention and do not indicate or imply that the structures or components referred to must have a specific orientation or be constructed in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0028] like Figures 1-6As shown, this embodiment provides a pipe airtightness testing machine, including a frame 1, a support panel 10, a pressure testing mechanism, a recovery mechanism, and a control mechanism. The frame 1 includes a rear support 101 and a bottom support 102. Universal wheels 13 and adjustable support feet 14 are symmetrically provided on the bottom front of the bottom support 102 and the bottom rear of the rear support 101. A pneumatic valve control box 9 and a main control box 11 are formed on the rear support 101 via a mounting panel. The main control box 11 is located on top of the pneumatic valve control box 9. A collection box 12 is formed on the bottom support 102 via a mounting panel. Box doors 24 are provided on the rear sides of the pneumatic valve control box 9 and the main control box 11, and on the front side of the collection box 12, to facilitate the inspection and maintenance of the pneumatic valve, control components, and internal components of the collection box 12. The recovery mechanism has two components, located directly below the pressure testing mechanism, with each recovery mechanism corresponding to one of the two pressure testing mechanisms. The two recovery mechanisms are symmetrically arranged in the collection box. Inside the collection box 12, discharge ports 7 are provided at both ends. The recycling mechanism is used to collect and recycle pipe fittings that fail the pressure testing mechanism and discharge them from the discharge ports 7. There are two support panels 10, which are symmetrically arranged at both ends of the top of the collection box 12. The support panels 10 are located on the front side of the mounting panel between the pneumatic valve control box 9 and the main control box 11. A recycling port 15 is provided between the two support panels 10 and is connected to the collection box 12. There are two pressure testing mechanisms, which are symmetrically arranged between the two support panels 10 via two support columns 16. The two pressure testing mechanisms are connected by a connecting column 17. The pressure testing mechanism includes a rotatable clamp assembly 2, an upper sealing pressure testing assembly 3, a side sealing pressure testing assembly 4, a bottom sealing pressure testing assembly 5, and a height adjustment assembly 6. There are ten upper sealing pressure testing assemblies 3, 4, and 5. The side sealing pressure testing components 4 and the bottom sealing pressure testing components 5 are arranged in a corresponding group to form a pressure testing component. That is, each pressure testing mechanism has ten groups of pressure testing components. The ten upper sealing pressure testing components 3 are set directly above the rotatable clamp component 2. The rotatable clamp component 2 can be rotatably set and is used to fix no more than ten pipe fittings. Each pipe fitting corresponds to a group of pressure testing components. The upper sealing pressure testing components 3, the side sealing pressure testing components 4, and the bottom sealing pressure testing components 5 are respectively connected to the first air inlet pipe, the second air inlet pipe, and the third air inlet pipe. The first air inlet pipe, the second air inlet pipe, and the third air inlet pipe are all equipped with pressure sensors and air inlet switches. The first air inlet pipe, the second air inlet pipe, and the third air inlet pipe are connected to one end of the main air pipe. The other end of the main air pipe is connected to the air storage tank. The main air pipe is equipped with a booster cylinder. The height adjustment component 6 is used to adjust the height of the side sealing pressure testing components 4 and the bottom sealing pressure testing components 5.The control mechanism includes a PLC controller installed in the main control box 11, a booster cylinder start button 18 and a booster cylinder pressure setting button 19 installed on the front of the main control box 11, a touch screen 20, and start buttons 21, stop buttons 22, and reset buttons 23 installed on the pressure measuring mechanism. The outputs of start buttons 21, stop buttons 22, and reset buttons 23 are electrically connected to the inputs of the touch screen 20. The touch screen 20 is equipped with a simulated operation panel for simulating the airtightness testing of different types of pipe fittings, an alarm indicator, and a touch panel. The output of each simulated operation panel is electrically connected to the input of the PLC controller. The output of the touch panel is electrically connected to the input of the booster cylinder pressure setting button 19 and the pressure sensors of the first, second, and third air inlet pipes. The input of the touch panel is electrically connected to the output of the alarm indicator. The output of the PLC controller is electrically connected to the air inlet switches of each pressure measuring component and the first, second, and third air inlet pipes of each pressure measuring component, as well as the input of the booster cylinder. ;

[0029] In this embodiment, as Figure 1 , Figure 4 and Figure 5 As shown, the connecting column 17 is provided with support plates 25 on the side away from the support panel 10 and on both sides of the connecting column 17. The pressure measuring mechanism is located between the two support plates 25 on the same side, and an upward-opening material box 26 is provided between the two support plates 25 on the same side. The material box 26 is located in front of the rotatable clamp assembly 2 and is used to load and unload qualified pipe fittings. The material box 26 is located inside the collection box 12.

[0030] Specifically, two sets of pressure testing mechanisms are supported by four support plates (25), thereby multiplying the number of pipe fittings that can be tested for airtightness. In this embodiment, as Figure 4 As shown, the rotatable clamp assembly 2 includes a ball bearing 201 disposed on a support plate 25 on the side of the connecting column 17 away from the support panel 10. A rotating shaft is rotatably connected to the ball bearing 201. A cylinder 202 is sleeved on one side of the rotating shaft. The top of the cylinder 202 is connected to the clamp 203, and the other side is connected to the second drive motor 204. The input end of the second drive motor 204 is electrically connected to the output end of the discharge control button.

[0031] Specifically, when the measured leakage value obtained by the pressure sensor from the pressure change value is greater than the preset threshold, the tested pipe fitting is a defective pipe fitting, and the test result display panel on the touch panel displays "NG". The signal is sent to the PLC controller, which controls the second drive motor 204 to drive the rotating shaft to rotate. The rotation of the rotating shaft drives the cylinder 202 to rotate, and the rotation of the cylinder 202 causes the defective pipe fitting on the clamp 203 to fall off the clamp 203. If the measured leakage value is not greater than the preset threshold, the tested pipe fitting is a qualified pipe fitting, and the test result display panel on the touch panel displays "OK".

[0032] In this embodiment, as Figure 4 and Figure 5 As shown, a first connecting plate 27 is horizontally arranged between two support plates 25 on the same side. Ten upper sealing pressure testing components 3 are arranged on the first connecting plate 27. The upper sealing pressure testing component 3 includes an upper sealing cylinder 301. The piston rod of the upper sealing cylinder 301 passes through the first connecting plate 27 and is connected to the upper sealing head 302. The upper sealing head 302 has a first air inlet on its side and a first air outlet at its bottom. The first air inlet and the first air outlet are connected, and a first air inlet pipe is connected to the first air inlet.

[0033] Specifically, by extending the upper sealing head 302 through the upper sealing cylinder 301, air can be supplied to the upper pipe opening of the pipe fitting, or the elbow pipe fitting can be fixed.

[0034] In this embodiment, as Figure 4 and Figure 5 As shown, the height adjustment component 6 includes two guide rails 601, which are respectively set on the opposite sides of two support plates 25 on the same side. A slider 602 is slidably connected to the guide rail 601. A vertical second connecting plate 28 is provided between the two sliders 602. The second connecting plate 28 is located directly below the first connecting plate 27. A side sealing pressure testing component 4 is provided on the second connecting plate 28. The side sealing pressure testing component 4 includes ten side sealing cylinders 401. The piston rod of the side sealing cylinder 401 passes through the second connecting plate 28 and is connected to the side sealing head 402. The side sealing head 402 has a second air inlet on its side and a second air outlet at its bottom. The second air inlet and the second air outlet are connected, and a second air inlet pipe is connected to the second air inlet.

[0035] Specifically, the guide rail 601 and slider 602 are designed to allow the second connecting plate 28 to slide, the height of the side sealing pressure measuring component 4 to be adjustable, and the side sealing head 402 to be extended by the side sealing cylinder 401 to achieve air passage through the horizontal pipe opening of the pipe fitting.

[0036] In this embodiment, as Figure 4 and Figure 5As shown, two support plates 25 on the same side are provided with fixing blocks 29 on opposite sides at the bottom of the guide rail 601. A vertical third connecting plate 30 is provided between the two fixing blocks 29. Ten bottom sealing pressure testing components 5 are provided on the third connecting plate 30. The bottom sealing pressure testing components 5 include bottom sealing cylinders 501. The piston rod of the bottom sealing cylinder 501 passes through the third connecting plate 30 and is connected to the bottom sealing head 502. The bottom sealing head 502 has a third air inlet on its side and a third air outlet at its bottom. The third air inlet and the third air outlet are connected, and a third air inlet pipe is connected to the second air inlet.

[0037] Specifically, the bottom sealing cylinder 501 extends the bottom side sealing head 402 to allow air to pass through the lower pipe opening of the pipe fitting.

[0038] In this embodiment, as Figure 5 As shown, the height adjustment assembly 6 also includes a flange-type guide shaft support 603 fixed to the side of the second connecting plate 28. The flange-type guide shaft support 603 is threadedly connected to a long threaded rod 604. The long threaded rod 604 passes through the first connecting plate 27 and is connected to the handwheel 605. The connection end of the long threaded rod 604 and the handwheel 605 is provided with a seated bearing.

[0039] Specifically, the flange-type guide shaft support 603 is installed on the second connecting plate 28, and is connected to the long threaded rod 604 threaded to it, and a handwheel 605 connected to the top of the long threaded rod 604, so that rotating the handwheel 605 can adjust the height of the second connecting plate 28. In this embodiment, as Figure 1 As shown, a vertical long plate 31 is vertically provided on the first connecting plate 27, and a start button 21, a stop button 22 and a reset button 23 are provided on the vertical long plate 31.

[0040] Specifically, the start button 21, stop button 22, and reset button 23 are designed to facilitate the operation of the testing machine. If a problem occurs during operation, the stop button 22 can be pressed to stop the testing machine from working. The reset button 23 is designed to facilitate repeated manual operations (such as placing the pipe fitting on the clamp 203).

[0041] In this embodiment, as Figure 3As shown, the recycling mechanism includes a conveying assembly 8 installed inside the collection box 12. The conveying assembly 8 includes a drive wheel 801, a driven wheel 802, and a conveyor belt 803 between the drive wheel 801 and the driven wheel 802. The driven wheel 802 is located on the discharge port 7, and the discharge port 7 is provided with an inclined discharge chute 32. A collection trough 33 is located directly above the conveyor belt 803. The collection trough 33 is located on the inner wall of the collection box 12, and a mounting plate 34 is connected to the bottom of the collection trough 33. A first drive motor 804 is mounted on the mounting plate 34. The shaft of the first drive motor 804 is connected to a drive wheel 805. The drive wheel 805 and the drive wheel 801 are driven by a synchronous belt 806. The input end of the first drive motor 804 is electrically connected to the output end of the PLC controller.

[0042] Specifically, when the substandard pipe fitting falls off the clamp 203, passes through the recycling port 15 and falls onto the conveyor belt 803, the PLC controller controls the first drive motor 804 to drive the rotating shaft to rotate. The rotation of the rotating shaft drives the drive wheel 805 to rotate. The rotation of the drive wheel 805 drives the drive wheel 801 to rotate through the transmission of the synchronous belt 806. The rotation of the drive wheel 801, combined with the passive wheel 802, drives the conveyor belt 803 to transport the substandard pipe fitting to the discharge port 7 for collection.

[0043] In this embodiment, as Figure 6 As shown, the touch panel includes a booster cylinder pressure value display panel, multiple pressure change value display panels, measured leakage value display panels, and test result display panels. Each pressure change value display panel, measured leakage value display panel, and test result display panel corresponds to a set of pressure measuring components. The output terminal of the booster cylinder pressure value display panel is electrically connected to the input terminal of the booster cylinder pressure setting button. The input terminal of the booster cylinder pressure value display panel is electrically connected to the output terminal of the PLC controller. The output terminal of the pressure change value display panel is electrically connected to the input terminals of the pressure sensors of the first, second, and third air inlets of each set of pressure measuring components. The output terminal of the measured leakage value display panel is electrically connected to the input terminal of the pressure change value display panel.

[0044] Specifically, before operation, the pressure of the booster cylinder is set using the booster cylinder pressure setting button and displayed on the booster cylinder pressure value display panel. During operation, the PLC controller applies pressure to the booster cylinder according to the set pressure. After air is supplied to the pipe, the pressure sensor detects the pressure change in the pipe and displays the pressure change value (ΔP) on the pressure change value display panel. Then, the measured leakage value (Q) is calculated using the formula Q = (ΔP × V) / Δt (V and Δt are both fixed). The measured leakage value is then displayed on the measured leakage value display panel and compared with the preset judgment threshold to display the test result (OK / NG) on the test result display panel. If the pressure change value displayed on the pressure change value display panel is too large, the signal is sent to the alarm indicator, which then issues an alarm on the touch screen (either an alarm sound or an alarm flash).

[0045] The working principle of this embodiment is as follows: Taking the airtightness test of multiple T-joints as an example, before the airtightness test, multiple T-joints to be tested are placed on the clamp 203, with one end of the T-joint blocked by the clamp 203. The simulated operation panel of the T-joint is selected on the touch screen 20, and then the booster cylinder start button 18 is pressed. The booster cylinder setting button is then pressed, and the booster cylinder pressure is displayed on the touch panel. Then the start button 21 is pressed. The PLC controller controls each pressure testing component and its air inlet switch to work according to the commands of the simulated operation panel of the T-joint. The upper sealing cylinder 301 extends the upper sealing head 3. 02. Simultaneously, the side sealing cylinder 401 extends the side sealing head 402, and the upper sealing head 302 extends into the horizontal port of the three-way pipe. The side sealing head 402 extends into the upper port of the three-way pipe. Then, the air inlet switch of the first air inlet pipe is opened. The booster cylinder draws the gas from the gas storage tank along the main air pipe and the first air inlet pipe to the first air inlet port. The gas is then transferred to the three-way pipe through the connection between the first air inlet port and the first air outlet port. The gas entering the three-way pipe is transferred to the second air inlet pipe through the second air outlet port and the second air inlet port. The pressure sensor on the second air inlet pipe detects the pressure change. The measured leakage value is calculated from the pressure change value and... The touch panel displays a comparison between the measured leakage value and a preset threshold. If the measured leakage value is not greater than the preset threshold, it proves that the pipe is airtight and is a qualified pipe. The touch panel displays "OK," and the operator places the qualified pipe into the material bin 26. If the measured leakage value is greater than the preset threshold, it proves that the pipe is airtight and is a substandard pipe. The touch panel displays "NG," and the touch screen 20 sends a signal to the PLC controller. The PLC controller controls the second drive motor 204 to drive the rotating shaft to rotate. The rotation of the rotating shaft drives the cylinder 202 to rotate. The rotation of the cylinder 202 causes the substandard pipe on the clamp 203 to rotate. The pipe fittings detach from the clamp 203 and fall through the recovery port 15 onto the conveyor belt 803. At the same time, the PLC controller controls the first drive motor 804 to drive the shaft to rotate. The rotation of the shaft drives the drive wheel 805 to rotate. The rotation of the drive wheel 805 drives the drive wheel 801 to rotate through the synchronous belt 806. The rotation of the drive wheel 801, combined with the passive wheel 802, drives the conveyor belt 803 to transport the substandard pipe fittings to the discharge port 7 for collection. Finally, the air inlet switch of the first air inlet pipe is closed, the upper sealing cylinder 301 retracts the upper sealing head 302, and the side sealing cylinder 401 retracts the side sealing head 402.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pipe fitting airtightness testing machine, characterized in that, include: The frame (1) includes a rear support (101) and a bottom support (102). The bottom of the bottom support (102) and the bottom of the rear support (101) are symmetrically provided with casters (13) and liftable support feet (14). The rear support (101) forms a pneumatic valve control box (9) and a main control box (11) through an installation panel. The main control box (11) is located on the top of the pneumatic valve control box (9). The bottom support (102) forms a collection box (12) through an installation panel. The rear of the pneumatic valve control box (9) and the main control box (11) and the front of the collection box (12) are provided with box doors (24). Support panel (10), there are two support panels (10), the two support panels (10) are symmetrically arranged at both ends of the top of the collection box (12), and the support panels (10) are arranged on the front side of the mounting panel between the pneumatic valve control box (9) and the main control box (11). A recycling port (15) is provided between the two support panels (10), and the recycling port (15) is connected to the collection box (12). The pressure measuring mechanism has two components, which are symmetrically arranged between two support panels (10) via two support columns (16). The two pressure measuring mechanisms are connected by a connecting column (17). The pressure measuring mechanism includes a rotatable clamp (203) assembly (2), an upper sealing pressure measuring assembly (3), a side sealing pressure measuring assembly (4), a bottom sealing pressure measuring assembly (5), and a height adjustment assembly (6). There are several upper sealing pressure measuring assemblies (3), side sealing pressure measuring assemblies (4), and bottom sealing pressure measuring assemblies (5). The upper sealing pressure measuring assemblies (3), side sealing pressure measuring assemblies (4), and bottom sealing pressure measuring assemblies (5) are arranged in a one-to-one correspondence to form a set of pressure measuring assemblies. Several upper sealing pressure measuring assemblies (3) are arranged in a set. The rotatable clamp (203) assembly (2) is located directly above the rotatable clamp (203) assembly (2). The rotatable clamp (203) assembly (2) is rotatable and is used to fix multiple pipe fittings. Each pipe fitting corresponds to a set of pressure testing assemblies. The top sealing pressure testing assembly (3), the side sealing pressure testing assembly (4), and the bottom sealing pressure testing assembly (5) are respectively connected to the first air inlet pipe, the second air inlet pipe, and the third air inlet pipe. The first air inlet pipe, the second air inlet pipe, and the third air inlet pipe are all equipped with pressure sensors and air inlet switches. The first air inlet pipe, the second air inlet pipe, and the third air inlet pipe are connected to one end of the main air pipe. The other end of the main air pipe is connected to the air storage tank. The main air pipe is equipped with a booster cylinder. The height adjustment assembly (6) is used to adjust the height of the side sealing pressure testing assembly (4). The recycling mechanism has two parts. The recycling mechanism is located directly below the pressure measuring mechanism, and the two recycling mechanisms are set one-to-one with the two pressure measuring mechanisms. The two recycling mechanisms are symmetrically arranged in the collection box (12). The collection box (12) has discharge ports (7) at both ends. The recycling mechanism is used to collect and recycle the pipe fittings that are not qualified by the corresponding pressure measuring mechanism, and discharge the unqualified pipe fittings from the discharge port (7). The control mechanism includes a PLC controller installed in the main control box (11), a booster cylinder start button (18), a booster cylinder pressure setting button (19), a touch screen (20), and a start button (21), a stop button (22), and a reset button (23) installed on the pressure measuring mechanism. The output terminals of the start button (21), the stop button (22), and the reset button (23) are electrically connected to the input terminals of the touch screen (20). The touch screen (20) is equipped with a model that simulates the airtightness test of different types of pipe fittings. The system includes an analog operation panel, an alarm indicator, and a touch panel. The output of each analog operation panel is electrically connected to the input of the PLC controller. The output of the touch panel is electrically connected to the pressure setting button (19) of the booster cylinder and the input of the pressure sensors of the first, second, and third air intake pipes. The input of the touch panel is electrically connected to the output of the alarm indicator. The output of the PLC controller is electrically connected to each pressure measuring component and the air intake switches of the first, second, and third air intake pipes of each pressure measuring component, as well as the input of the booster cylinder.

2. The pipe fitting airtightness testing machine according to claim 1, characterized in that, The rotatable clamp (203) assembly (2) includes a ball bearing (201) disposed on a support plate (25) on the side of the connecting column (17) away from the support panel (10). A rotating shaft is rotatably connected to the ball bearing (201). A cylinder (202) is sleeved on one side of the rotating shaft. The top of the cylinder (202) is connected to the clamp (203), and the other side is connected to the second drive motor (204). The input end of the second drive motor (204) is electrically connected to the output end of the PLC controller.

3. The pipe fitting airtightness testing machine according to claim 2, characterized in that, The connecting column (17) is provided with a support plate (25) on the side away from the support panel (10) and on both sides of the connecting column (17). The pressure measuring mechanism is located between the two support plates (25) on the same side, and an upward-opening material box (26) is provided between the two support plates (25) on the same side. The material box (26) is located in front of the rotatable clamp (203) assembly (2) and is used to load and unload qualified pipe fittings. The material box (26) is located inside the collection box (12).

4. The pipe fitting airtightness testing machine according to claim 2, characterized in that, A first connecting plate (27) is horizontally arranged between the two support plates (25) on the same side. Several upper sealing pressure testing components (3) are arranged on the first connecting plate (27). The upper sealing pressure testing component (3) includes an upper sealing cylinder (301). The piston rod of the upper sealing cylinder (301) passes through the first connecting plate (27) and is connected to the upper sealing head (302). The upper sealing head (302) has a first air inlet on its side and a first air outlet at its bottom. The first air inlet and the first air outlet are connected, and a first air inlet pipe is connected to the first air inlet.

5. The pipe fitting airtightness testing machine according to claim 4, characterized in that, The height adjustment component (6) includes two guide rails (601), which are respectively set on the opposite sides of the two support plates (25) on the same side. A slider (602) is slidably connected on the guide rail (601). A vertical second connecting plate (28) is provided between the two sliders (602). The second connecting plate (28) is located directly below the first connecting plate (27). The side sealing pressure measuring component (4) is provided on the second connecting plate (28). The side sealing pressure measuring component (4) includes several side sealing cylinders (401). The piston rod of the side sealing cylinder (401) passes through the second connecting plate (28) and is connected to the side sealing head (402). The side sealing head (402) has a second air inlet on its side and a second air outlet at its bottom. The second air inlet and the second air outlet are connected, and a second air inlet pipe is connected to the second air inlet.

6. The pipe fitting airtightness testing machine according to claim 1, characterized in that, The two support plates (25) on the same side are provided with fixing blocks (29) at the bottom of the guide rail (601). A vertical third connecting plate (30) is provided between the two fixing blocks (29). The bottom sealing pressure measuring assembly (5) is provided on the third connecting plate (30). The bottom sealing pressure measuring assembly (5) includes several bottom sealing cylinders (501). The piston rod of the bottom sealing cylinder (501) passes through the third connecting plate (30) and is connected to the bottom sealing head (502). The bottom sealing head (502) is provided with a third air inlet on its side and a third air outlet at the bottom of the bottom sealing head (502). The third air inlet and the third air outlet are connected, and a third air inlet pipe is connected to the second air inlet.

7. A pipe fitting airtightness testing machine according to claim 5, characterized in that, The height adjustment assembly (6) also includes a flange-type guide shaft support (603) fixed to the side of the second connecting plate (28). The flange-type guide shaft support (603) is threadedly connected to a long threaded rod (604). The long threaded rod (604) passes through the first connecting plate (27) and is connected to the handwheel (605). The connection end of the long threaded rod (604) and the handwheel (605) is provided with a seated bearing.

8. The pipe fitting airtightness testing machine according to claim 4, characterized in that, The first connecting plate (27) is vertically provided with a vertical long plate (31), and the vertical long plate (31) is provided with the start button (21), stop button (22) and reset button (23).

9. A pipe fitting airtightness testing machine according to claim 1, characterized in that, The recycling mechanism includes a conveying assembly (8) installed in the collection box (12). The conveying assembly (8) includes a drive wheel (801), a driven wheel (802), and a conveyor belt (803) between the drive wheel (801) and the driven wheel (802). The driven wheel (802) is located on the discharge port (7), and the discharge port (7) is provided with an inclined discharge trough (32). A collection trough (33) is located directly above the conveyor belt (803). The collection trough (33) is located on the inner wall of the collection box (12), and the bottom of the collection trough (33) is connected to an mounting plate (34). A first drive motor (804) is installed on the mounting plate (34). The shaft of the first drive motor (804) is connected to a drive wheel (805). The drive wheel (805) and the drive wheel (801) are driven by a synchronous belt (806). The input end of the first drive motor (804) is electrically connected to the output end of the discharge control button.

10. A pipe fitting airtightness testing machine according to claim 1, characterized in that, The touch panel includes a booster cylinder pressure value display panel and multiple pressure change value display panels, measured leakage value display panels and test result display panels. Each pressure change value display panel, measured leakage value display panel and test result display panel corresponds to a set of pressure measuring components. The output end of the booster cylinder pressure value display panel is electrically connected to the input end of the booster cylinder pressure setting button (19). The input end of the booster cylinder pressure value display panel is electrically connected to the output end of the PLC controller. The output end of the pressure change value display panel is electrically connected to the input end of the pressure sensor of the first air inlet pipe, the second air inlet pipe and the third air inlet pipe of each set of pressure measuring components. The output end of the measured leakage value display panel is electrically connected to the input end of the pressure change value display panel.

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