Elbow joint air tightness detection device

Abstract

The utility model discloses an elbow joint air tightness detection device which comprises a detection box, an elbow joint to be detected in the detection box, a trapezoid round pipe and a trapezoid plug are compacted through an air cylinder, and a closed space is formed in the elbow joint to be detected. The situation that the detection result is inaccurate due to the fact that the joints are insufficient in sealing performance or not tight in connection and gaps exist is prevented, meanwhile, the box door of the detection box and the pipeline small holes of the inflation pipeline are sealed, it is further ensured that the interior of the detection box is a closed space, factors influencing the detection result are reduced, and the detection efficiency is improved. The sensor capable of monitoring the air pressure is arranged in the box, the air pressure value monitored by the sensor can be displayed on the display unit, the air tightness of the elbow joint can be determined by observing whether the air pressure value on the display unit changes or not, and the detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elbow joint detection, in particular to an elbow joint air tightness detection device. Background Art

[0002] In the pipeline system, when the pipeline fluid needs to flow at different angles, or when it is necessary to bypass certain obstacles when installing the pipeline, the elbow joint on the pipeline can achieve this. In addition, the air tightness of the elbow joint is crucial. If there is an air tightness problem with the elbow joint, it may cause fluid leakage, affect the normal operation of the system, and even cause safety hazards, resulting in irreversible consequences.

[0003] Some of the existing air tightness testing tools for elbow joints are still using traditional methods for checking air tightness, such as the water immersion method. During the testing process, the sealing of each joint is insufficient or there are gaps, which in turn affects the air tightness testing and makes the test results inaccurate. Utility Model Content

[0004] The utility model aims to provide a device for detecting air tightness of elbow joints, so as to effectively solve the problem that the detection results of the existing devices for detecting air tightness of elbow joints are not accurate enough.

[0005] The utility model is realized by the following technical solutions:

[0006] A device for detecting air tightness of an elbow joint comprises a detection box, wherein the detection box is a sealing detection box, wherein first cylinders are arranged on both sides of the bottom of the box, and a telescopic rod that can be telescoped up and down is connected to the upper end of the first cylinder, and the telescopic rod is connected and fixed to the lower surface of a movable base, and a guide groove with a left-right direction is provided on the upper surface of the movable base, and a guide rod with an axis arranged along the left-right direction is provided in the guide groove, and a guide ring that can slide left and right is provided on the guide rod, and the guide ring is connected with a trapezoidal plug for inserting one end of the elbow joint to be tested, and the trapezoidal plug is arranged upward, and a small pipe hole is provided on the box wall on one side of the detection box, and an inflation pipe passes through the small pipe hole to enter the detection box, and the end of the inflation pipe entering the detection box is sealed and connected with a trapezoidal round pipe for inserting the other end of the elbow joint to be tested, and a limiting plate is provided above the small pipe hole, and a second cylinder is installed in the box wall on the other side, and the second cylinder is provided with a piston rod that can be telescoped left and right, and a buffer pad that presses the side of the elbow joint to be tested is provided at the front end of the piston rod, and an air pressure sensor is provided in the detection box, and a display unit connected to the sensor is provided outside the detection box.

[0007] Furthermore,

[0008] The trapezoidal plug is in the shape of a trapezoidal cylinder, with a small upper end and a large lower end, the lower end being connected to a guide ring, and the upper end being able to be inserted into the elbow joint to be tested.

[0009] Furthermore,

[0010] Next to the detection box, there is an inflation component, which includes an air source connected to an inflation pipeline.

[0011] Furthermore,

[0012] The trapezoidal circular tube is in the shape of a trapezoidal cylinder, the end with a larger cross section is sealed and connected to the inflation pipe, and the end with a smaller cross section of the trapezoidal circular tube can be inserted into the elbow joint to be tested.

[0013] Furthermore,

[0014] The size of the small hole of the pipeline is just enough for the inflation pipeline to pass through, and a sealing layer is provided between the small hole of the pipeline and the inflation pipeline.

[0015] Furthermore,

[0016] The second cylinder, the piston rod, the trapezoidal round tube and the trapezoidal plug are all in a vertical plane.

[0017] Furthermore,

[0018] The air pressure sensor and the display unit are connected via wires.

[0019] Furthermore,

[0020] The front of the detection box is a box door, a box door frame is arranged at the box door, and a sealing strip is installed on the box door frame.

[0021] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0022] The utility model discloses a device for detecting air tightness of elbow joints, which is easy and convenient to operate. The elbow to be detected is squeezed and compacted at the connection between the elbow to be detected and the trapezoidal round pipe and the trapezoidal plug by a cylinder in the detection box, so that the connection will not have gaps due to insufficient sealing of the joint or loose connection, thereby preventing gas leakage at the interface during the detection process and affecting the detection result, thereby ensuring a better sealing effect.

[0023] The air source in the inflation component can quickly inflate the elbow joint through the inflation pipe. At the same time, the air pressure sensor arranged in the detection box monitors the air pressure in the detection box and displays the measured air pressure value on the display unit. By observing whether the air pressure value on the display unit changes, the air tightness of the elbow joint can be judged to ensure the reliability of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0025] Figure 1 The schematic diagram of the structure of the detection box is shown in Figure 2.

[0026] Figure 2 This is the left view of the detection box.

[0027] Figure 3 is a top view of the movable base.

[0028] Figure 4 This is the state diagram of the device when no detection is performed.

[0029] Figure 5 This is a state diagram of the device during detection.

[0030] Marks and corresponding parts names in the attached drawings:

[0031] 1- inflation assembly, 10- air source, 11- inflation pipe, 12- trapezoidal pipe, 2- detection box, 20- first cylinder, 201- telescopic rod, 21- movable base, 22- guide groove, 23- guide rod, 24- guide ring, 25- trapezoidal plug, 26- small hole in the pipe, 27- second cylinder, 28- piston rod, 29- buffer pad, 210- box door, 211- box door frame, 212- limit rod, 3- air pressure sensor, 4- display unit, 5- elbow joint to be tested. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0033] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example

[0036] See also Figures 1 to 5 :

[0037] A device for detecting air tightness of an elbow joint comprises a detection box 2, characterized in that the detection box 2 is a sealing detection box, a first cylinder 20 is arranged on both sides of the bottom of the box, a telescopic rod 201 which can be telescoped up and down is connected to the upper end of the first cylinder 20, the telescopic rod 201 is connected and fixed to the lower surface of a movable base 21, a guide groove 22 which runs left and right is opened on the upper surface of the movable base 21, a guide rod 23 which is arranged along the left and right axis in the guide groove 22, the guide rod 23 is sleeved with a guide ring 24 which can slide left and right, the guide ring 24 is connected with a trapezoidal plug 25 for inserting one end of the elbow joint to be tested, the trapezoidal plug 25 is arranged upward, A small pipe hole 26 is provided on the box wall on one side of the detection box 2, and the inflation pipe 11 passes through the small pipe hole 26 to enter the detection box 2. The end of the inflation pipe 11 entering the detection box 2 is sealed and connected with a trapezoidal round pipe 12 for inserting the other end of the elbow joint to be tested. A limiting plate 212 is provided above the small pipe hole 26, and a second cylinder 27 is installed in the box wall on the other side. The second cylinder 27 is provided with a piston rod 28 that can be telescoped left and right, and a buffer pad 29 is provided at the front end of the piston rod 28 to press the side of the elbow joint to be tested. An air pressure sensor 3 is provided in the detection box 2, and a display unit 4 connected to the sensor 3 is provided outside the detection box 2.

[0038] Furthermore,

[0039] The trapezoidal plug 25 is in the shape of a trapezoidal cylinder, with a small upper end and a large lower end, the lower end of which is connected to the guide ring 24, and the upper end of which can be inserted into the elbow joint 5 to be tested.

[0040] Furthermore,

[0041] Next to the detection box 2, there is an inflatable component 1, which includes an air source 10 connected to an inflatable pipe 11. The air source 10 inflates air into the elbow joint 5 to be tested through the inflatable pipe 11 and the trapezoidal round pipe 12.

[0042] Furthermore,

[0043] The trapezoidal tube 12 is in the shape of a trapezoidal cylinder, and the end with a large cross section is sealed and connected to the inflation pipe 11, and the end with a small cross section of the trapezoidal tube 12 can be inserted into the elbow joint 5 to be tested. The end of the elbow joint 5 to be tested that contacts the trapezoidal tube 12 is blocked by the trapezoidal tube 12.

[0044] Furthermore,

[0045] The size of the pipe hole 26 is just enough to allow the inflation pipe 11 to pass through, and a sealing layer is provided between the pipe hole 26 and the inflation pipe 11. The sealing layer can further ensure that when the detection box 2 detects the air tightness of the bent pipe, the environment where the bent pipe is located is a closed space.

[0046] Furthermore,

[0047] The second cylinder 27, the piston rod 28, the trapezoidal tube 12 and the trapezoidal plug 25 are all in a vertical plane, ensuring that the second cylinder 27 and the piston rod 28 can act on the elbow joint 5 to be tested, compacting the joint between the elbow joint 5 to be tested and the trapezoidal tube 12, further preventing gas leakage during the test.

[0048] Furthermore,

[0049] The air pressure sensor 3 and the display unit 4 are connected by wires. The air pressure sensor 3 can monitor the air pressure in the detection box in real time, and the air pressure value measured by the air pressure sensor 3 is displayed on the display unit 4.

[0050] Furthermore,

[0051] The front of the detection box 2 is a box door 210, and a box door frame 211 is provided at the box door. A sealing strip is installed on the box door frame 211 to ensure that the detection box 2 is in a sealed state when the box door 210 is closed.

[0052] The principle of the utility model is:

[0053] Before testing the air tightness, the elbow joint to be tested needs to be fixed in the test box 2 as required. First, open the box door 210 and install the elbow joint 5 on the trapezoidal plug 25. The inflation pipe 11 passes through the pipe hole 26 on the test box 2 and enters the test box 2. One end of the inflation pipe 11 is connected to the gas source 10. The end of the inflation pipe 11 entering the test box 2 is sealed and connected with a trapezoidal round tube 12 for inserting the other end of the elbow joint 5 to be tested. The gas source 10 can inflate the test box 2 through the inflation pipe 11 and the trapezoidal round tube 12.

[0054] After the elbow joint 5 to be tested is installed on the trapezoidal plug 25, the first cylinders 20 on both sides of the bottom of the detection box 2 are started, and the telescopic rods 201 move upward to push the movable base 21 to rise. When the elbow joint 5 to be tested is in contact with the limit plate 212, the trapezoidal round tube 12 of the elbow joint 5 to be tested is aligned in the horizontal direction. At the same time, the first cylinder 20 continues to operate, and the telescopic rod 201 continues to move upward, so that the trapezoidal plug 25 continues to move upward, thereby strengthening the sealing between the trapezoidal plug 25 and the elbow joint 5 to be tested.

[0055] At this time, the second cylinder 27 is started, and the piston rod 28 will move toward the elbow joint 5 to be tested, and push the elbow joint 5 to be tested close to the trapezoidal circular tube 12. The end of the trapezoidal circular tube 12 with a small cross section is inserted into the elbow joint 5 to be tested, and presses the elbow joint 5 to be tested, so that the trapezoidal circular tube 12 and the elbow joint 5 to be tested are sealed. The front end of the piston rod 28 is provided with a buffer pad 29 for pressing the side of the elbow joint to be tested. The buffer pad 29 can prevent the elbow joint 5 to be tested from leaving marks during the pressing process. Pressing the elbow joint 5 to be tested can ensure that the joint between the elbow joint to be tested and the trapezoidal circular tube 12 is pressed tightly, thereby improving the tightness of the connection between the two. After the above operation, the lumen of the elbow joint 5 to be tested is a closed space, which ensures that the test results will not be affected by insufficient sealing at the joint or gaps in the loose connection during the test.

[0056] Afterwards, the box door 210 is closed, and the box frame 211 and the sealing strip provided at the box opening are used to prevent the box door 210 from being loosely closed, thereby ensuring that the internal space of the detection box 2 is a closed space when the box door 210 is closed.

[0057] When the test starts, the gas source 10 injects gas into the closed tube cavity of the elbow joint 5 to be tested in the detection box 2, and the air pressure sensor 3 arranged in the detection box 2 will accurately monitor the air pressure in the detection box 2, and at the same time display the monitored air pressure value on the display unit 4. By observing whether the air pressure value displayed on the display unit 4 changes, the air tightness of the tested elbow joint is determined. The air pressure sensor 3 and the display unit 4 are both existing technologies, and the combination of the two constitutes a combined detection and display device.

[0058] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for testing the air tightness of an elbow joint, comprising a testing box (2), characterized in that: The detection box (2) is a sealing detection box. First cylinders (20) are provided on both sides of the bottom of the box. The upper end of the first cylinder (20) is connected to a telescopic rod (201) that can be telescoped upward and downward. The telescopic rod (201) is fixedly connected to the lower surface of a movable base (21). A guide groove (22) running leftward and rightward is provided on the upper surface of the movable base (21). A guide rod (23) whose axis is arranged along the leftward and rightward directions is provided in the guide groove (22). The guide rod (23) is sleeved with a guide ring (24) that can slide leftward and rightward. The guide ring (24) is connected to a trapezoidal plug (25) for inserting one end of a bend pipe joint to be tested. The trapezoidal plug (25) is arranged upward. A pipe is provided on the box wall on one side of the detection box (2). A small hole (26) is formed in the pipe, and an air-filled pipe (11) passes through the pipe small hole (26) to enter the detection box (2). The end of the air-filled pipe (11) entering the detection box (2) is sealed and connected to a trapezoidal round pipe (12) for inserting the other end of the elbow joint to be tested. A limit plate (212) is provided above the pipe small hole (26). A second cylinder (27) is installed in the other side of the box wall. The second cylinder (27) is provided with a piston rod (28) that can be telescoped to the left and right. A buffer pad (29) is provided at the front end of the piston rod (28) to press the side of the elbow joint to be tested. An air pressure sensor (3) is provided in the detection box (2). A display unit (4) connected to the sensor (3) is provided outside the detection box (2).

2. The device for detecting air tightness of elbow joints according to claim 1, characterized in that: The trapezoidal plug (25) is in the shape of a trapezoidal cylinder, with a small upper end and a large lower end, the lower end of which is connected to the guide ring (24), and the upper end of which can be inserted into the elbow joint (5) to be tested.

3. The device for detecting air tightness of elbow joints according to claim 1, characterized in that: Next to the detection box (2), there is an inflation component (1), and the inflation component (1) includes an air source (10) connected to an inflation pipe (11).

4. The device for detecting air tightness of elbow joints according to claim 3, characterized in that: The trapezoidal circular tube (12) is in the shape of a trapezoidal cylinder, the end with a larger cross section is sealedly connected to the inflation pipe (11), and the end with a smaller cross section of the trapezoidal circular tube (12) can be inserted into the elbow joint (5) to be tested.

5. The device for detecting air tightness of elbow joints according to claim 3, characterized in that: The size of the pipeline hole (26) is just enough to allow the inflation pipeline (11) to pass through, and a sealing layer is provided between the pipeline hole (26) and the inflation pipeline (11).

6. The device for detecting air tightness of elbow joints according to claim 3, characterized in that: The second cylinder (27), the piston rod (28), the trapezoidal round tube (12) and the trapezoidal plug (25) are all in a vertical plane.

7. The device for detecting air tightness of elbow joints according to claim 1, characterized in that: The air pressure sensor (3) and the display unit (4) are connected via a wire.

8. The device for detecting air tightness of elbow joints according to claim 1, characterized in that: The front of the detection box (2) is a box door (210), a box door frame (211) is provided at the box door, and a sealing strip is installed on the box door frame (211).

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