Vibration wheel air tightness detection tool

Abstract

The vibration wheel air tightness detection tool comprises a lower positioning assembly and an upper sealing assembly, the lower positioning assembly comprises a support and a positioning column fixedly arranged on the upper side face of the support, the upper sealing assembly comprises a sealing cover, a positioning screw and a sealing nut, and the lower end of the upper sealing assembly is in threaded connection with the top end of the positioning column; a first silica gel gasket and a second silica gel gasket are respectively arranged between the sealing cover support and the corresponding vibrating wheel side plate; the quick-change connector, the pressure release valve and the pressure measuring meter are communicated with the inner cavity of the vibrating wheel. Compressed air with set pressure is introduced into the inner cavity of the vibrating wheel, torque is applied through the sealing nut, the vibrating wheel, the first silica gel gasket, the second silica gel gasket and the sealing cover plate are pressed, and the inner cavity of the vibrating wheel is completely sealed. The sealing device is simple and stable in structure, the mounting holes of the side plates of the vibrating wheel are well sealed, and the upper silica gel gasket and the lower silica gel gasket are extruded to deform, so that effective sealing can be achieved.

Description

Technical Field

[0001] This utility model relates to a vibratory wheel airtightness testing fixture, belonging to the technical field of engineering machinery processing equipment. Background Technology

[0002] Air tightness testing of the vibratory roller is crucial because the inside of the vibratory roller is usually filled with lubricating oil or hydraulic oil. Good air tightness prevents oil leakage, ensuring the normal operation and long-term stability of the vibratory roller. Poor air tightness can lead to insufficient lubrication of the equipment, increased mechanical wear, and may also pollute the environment and even cause safety hazards. Therefore, regularly testing the air tightness of the vibratory roller is a key measure to ensure efficient operation and extend the service life of the equipment.

[0003] Currently, commonly used airtightness testing methods mainly include pneumatic pressure testing and water immersion testing. Pneumatic pressure testing involves filling the vibratory wheel with gas at a certain pressure and using a pressure sensor to monitor pressure changes to determine if a leak exists. This method is simple to operate and applicable to most scenarios, but its sensitivity for detecting minute leaks is limited. Water immersion testing involves immersing the vibratory wheel in water and observing whether bubbles are generated to determine airtightness. This method is more sensitive to detecting minute leaks, but it is relatively complex to operate and requires certain equipment.

[0004] Furthermore, with technological advancements, advanced detection methods have gradually been applied, such as ultrasonic testing and infrared thermography. Ultrasonic testing locates leaks by capturing ultrasonic signals generated at the leak point, offering high precision and non-contact characteristics. Infrared thermography uses temperature changes to identify leak points, making it suitable for rapid detection of large equipment, but it is more expensive.

[0005] Maintaining good airtightness of the vibratory roller can prevent lubricating oil leakage, prevent contaminants from entering, maintain internal pressure, improve work efficiency, and reduce maintenance costs. Therefore, designing a simple, stable, low-cost, and quick and effective vibratory roller airtightness testing fixture is an urgent problem to be solved. Summary of the Invention

[0006] Purpose of the invention: To address the shortcomings of existing technologies, this invention provides a vibratory wheel airtightness testing fixture. By connecting a high-pressure air tank to a quick-connect fitting on the fixture's support via an air pipe, compressed air with a set pressure is introduced into the vibratory wheel's inner cavity through the air pipe. A torque is applied using a sealing nut, and the upper and lower silicone gaskets are deformed to seal the upper and lower contact surfaces. The airtightness of the vibratory wheel's inner cavity is then tested, thus determining its airtightness. The overall device is simple, stable, and low-cost, with promising application prospects.

[0007] Technical solution: A vibratory wheel air tightness testing fixture includes a lower positioning assembly and an upper sealing assembly. The lower positioning assembly includes a support and a positioning post fixedly disposed on the upper side of the support. The outer diameter of the positioning post is smaller than the inner diameter of the mounting hole of the vibratory wheel side plate. The upper sealing assembly includes a sealing cover with an outer diameter larger than the inner diameter of the mounting hole of the vibratory wheel side plate. A positioning screw is disposed through the sealing cover. A sealing nut is threaded to the upper end of the positioning screw, and the lower end is threaded to the top of the positioning post.

[0008] A first silicone gasket and a second silicone gasket are respectively provided between the sealing cover and the corresponding vibrating wheel side plate, and between the support and the corresponding vibrating wheel side plate.

[0009] A quick-connect coupling is installed from bottom to top, penetrating the positioning column and communicating with the inner cavity of the vibrating wheel. The quick-connect coupling is connected to an external high-pressure gas tank. A pressure relief valve and a pressure gauge are installed through the sealing cover and communicating with the inner cavity of the vibrating wheel.

[0010] This invention connects a high-pressure air tank to a quick-connect fitting on an airtightness testing fixture via an air pipe. Compressed air at a set pressure is introduced into the vibrating wheel's inner cavity through the air pipe. A sealing nut applies torque, tightening the vibrating wheel, the first silicone gasket, the second silicone gasket, and the sealing cover, ensuring a complete seal within the vibrating wheel's inner cavity. A pressure gauge monitors the current pressure within the vibrating wheel's inner cavity. When the compressed air pressure in the workpiece's inner cavity reaches the set testing pressure, airtightness testing liquid is sprayed onto the upper and lower circumferential welds of the workpiece. Any defects in the welds are checked and marked. If defects are found, the high-pressure gas inlet switch is closed, and the pressure relief valve is opened, allowing the compressed air inside the workpiece to be quickly depressurized to a level suitable for repair welding. The defects are then repaired using gas-assisted welding. The above steps are repeated to test the airtightness of the workpiece's welds until no defects are found. This invention features a simple and stable structure, provides excellent sealing at the mounting holes on the vibrating wheel's side plate, and the deformation of the upper and lower silicone gaskets under pressure achieves effective sealing.

[0011] A safety valve is also installed through the sealing cover and in communication with the inner cavity of the vibrating wheel.

[0012] When the pressure relief valve and pressure gauge fail, causing the compressed air pressure inside the workpiece to exceed the safe pressure, the safety regulator will release the pressure to the set safe pressure value to ensure the safety of the airtightness inspection process.

[0013] A silicone sealing ring is provided between the sealing nut and the sealing cap, which is fitted onto the outside of the positioning screw.

[0014] By setting a silicone sealing ring, when torque is applied to the sealing nut, the silicone sealing ring is compressed and deformed, and fits tightly with the positioning screw, filling the gap between the positioning screw and the sealing nut and the sealing cover. This prevents gas leakage at the threaded connection, which could lead to inaccurate sealing measurements and further improves the accuracy of workpiece airtightness testing.

[0015] A positioning silicone pad is fixedly installed on the support between the support and the adjacent vibrating wheel side plate. The positioning silicone pad is located in the outer area of ​​the second silicone washer and at least two are arranged in a circular array along the circumference of the second silicone washer.

[0016] To ensure the vibratory wheel remains stable after being installed into the airtightness testing fixture, a positioning silicone pad is used to increase contact friction and prevent the lower side plate of the vibratory wheel from shifting. The thickness of the silicone pad can be set to be consistent with that of the second silicone gasket, so that the deformation is consistent when the vibratory wheel is pressed down as a whole, allowing the second silicone gasket to deform effectively and provide a good sealing effect.

[0017] The positioning column includes a circular base that is clearance-fitted to the inner side of the mounting hole of the vibrating wheel side plate, a connecting part that is threaded to the positioning bolt, and at least three connecting ribs arranged in a circumferential array between the base and the connecting part. The outer diameter of the connecting part is smaller than the outer diameter of the base, and the positioning column as a whole is frustoconical in shape.

[0018] The positioning post is designed in a frustum shape, which serves as a guide when installing the vibrating wheel, while reducing the probability of collision between the vibrating wheel and the positioning post, and reducing wear on the vibrating wheel caused by friction. The middle part of the positioning post uses a combination of stiffening plates to provide sufficient rigidity. The circular base and the mounting holes of the vibrating wheel side plate are fitted with a clearance to achieve the initial positioning of the vibrating wheel, and further positioning is achieved by tightening the sealing nut.

[0019] The support includes an upper support plate and a lower support plate, which are fixedly connected as a whole by vertically arranged connecting plates. At least three connecting plates are arranged in a circular array along the circumference of the upper or lower support plate.

[0020] By setting the support as a combination of upper support, lower support and connecting plate, the overall weight of the support is increased, which makes the air tightness testing tool more stable. At the same time, the central space can accommodate the air inlet pipe and quick-connect coupling, providing it with a spacious operating and installation space.

[0021] A handle is fixedly provided on the upper side of the sealing cover, and a set of handles are symmetrically arranged along the diameter direction of the sealing cover.

[0022] To facilitate the installation and removal of the sealing cap, a handle is provided to make the process easier and more convenient.

[0023] Beneficial Effects: This utility model connects a high-pressure air tank to a quick-connect coupling on an airtightness testing fixture via an air pipe. Compressed air at a set pressure is introduced into the vibrating wheel's inner cavity through the air pipe. A sealing nut applies torque, tightening the vibrating wheel, the first silicone gasket, the second silicone gasket, and the sealing cover, ensuring a complete seal on both sides of the vibrating wheel. Compressed air is then introduced to the set pressure value, and the welded ring is tested for leakage using a water immersion method. The overall structure is simple and stable, easy to operate, effectively seals both sides of the vibrating wheel to avoid testing errors, and has low cost, making it a promising application. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a structural diagram of the present invention after the vibrating wheel is installed.

[0026] Figure 2 This is a structural diagram of the present utility model.

[0027] Figure 3 This is a side view of the present invention. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] like Figures 1 to 3 As shown, a vibratory wheel airtightness testing fixture includes a lower positioning component 1 and an upper sealing component 2. The lower positioning component 1 includes a support 11 and a positioning post 12 fixedly disposed on the upper side of the support 11. The outer diameter of the positioning post 12 is smaller than the inner diameter of the mounting hole of the vibratory wheel side plate. The upper sealing component 2 includes a sealing cover 21 with an outer diameter larger than the inner diameter of the mounting hole of the vibratory wheel side plate. A positioning screw 22 is disposed through the sealing cover 21. A sealing nut 23 is threaded to the upper end of the positioning screw 22, and the lower end is threaded to the top end of the positioning post 12.

[0032] A first silicone gasket 3 and a second silicone gasket 4 are respectively provided between the sealing cover 21 and the corresponding vibrating wheel side plate, and between the support 11 and the corresponding vibrating wheel side plate.

[0033] A quick-connector 5 is provided from bottom to top, penetrating the positioning post 12 and communicating with the inner cavity of the vibrating wheel. The quick-connector 5 is connected to an external high-pressure gas tank. A pressure relief valve 24 and a pressure gauge 25 are provided, penetrating the sealing cover 21 and communicating with the inner cavity of the vibrating wheel.

[0034] This invention connects a high-pressure gas tank to the quick-connect coupling 5 of the airtightness testing fixture support 11 via an air pipe. Compressed air with a set pressure is introduced into the vibrating wheel's inner cavity through the air pipe. A torque is applied using the sealing nut 23 to tighten the vibrating wheel, the first silicone gasket 3, and the sealing cover 21, ensuring a complete seal within the vibrating wheel's inner cavity. The pressure value within the vibrating wheel's inner cavity is monitored using a pressure gauge. When the compressed air pressure within the workpiece's inner cavity reaches the set testing pressure, airtightness testing liquid is sprayed onto the upper and lower circumferential weld seams of the workpiece. In this embodiment, soapy water is brushed onto the outer surface of the weld seam, and air bubbles are observed. The presence of air bubbles indicates pores in the weld seam. Any defects in the weld seam are checked and marked. If defects are found, the high-pressure gas inlet switch is closed, and the pressure relief valve 24 is opened to quickly depressurize the compressed air within the workpiece to a level suitable for repair welding. The defects are then repaired using gas-assisted welding. The above steps are repeated to test the airtightness of the workpiece's weld seams until no defects remain. This application has a simple and stable structure, provides good sealing at the mounting hole of the vibrating wheel side plate, and the upper and lower silicone gaskets deform under compression to achieve effective sealing.

[0035] A safety valve 26 is also provided that penetrates the sealing cover 21 and communicates with the inner cavity of the vibrating wheel.

[0036] When the pressure relief valve 24 and pressure gauge 25 fail, causing the compressed air pressure inside the workpiece to exceed the safe pressure, the safety valve 26 will release pressure to the set safe pressure value to ensure the safety of the airtightness testing process.

[0037] A silicone sealing ring 27, fitted onto the outside of the positioning screw 22, is provided between the sealing nut 23 and the sealing cap 21.

[0038] By setting the silicone sealing ring 27, when torque is applied to the sealing nut 23, the silicone sealing ring 27 is squeezed and deformed, and fits tightly with the positioning screw 22, filling the gap between the positioning screw 22 and the sealing nut 23 and the sealing cover 21, avoiding gas leakage at the threaded connection that would lead to inaccurate sealing measurement, and further improving the accuracy of workpiece airtightness detection.

[0039] A positioning silicone pad 6 is fixedly installed on the support 11 between the support 11 and the adjacent vibrating wheel side plate. The positioning silicone pad 6 is located in the outer area of ​​the second silicone washer 4 and at least two are arranged in a circular array along the circumference of the second silicone washer 4.

[0040] To ensure the vibratory wheel remains stable after being installed into the airtightness testing fixture, a positioning silicone pad 6 is used to increase contact friction and prevent the lower vibratory wheel side plate from shifting. The thickness of the silicone pad 6 can be set to be consistent with that of the second silicone gasket 4, so that the deformation is consistent when the vibratory wheel is pressed down as a whole, allowing the second silicone gasket 4 to deform effectively and provide a good sealing effect.

[0041] The positioning post 12 includes a circular base 121 that is clearance-fitted with the inner side of the mounting hole of the vibrating wheel side plate, a connecting part 122 that is threadedly connected to the positioning bolt, and at least three connecting ribs 123 arranged in a circumferential array between the base 121 and the connecting part 122. The outer diameter of the connecting part 122 is smaller than the outer diameter of the base 121, and the positioning post 12 is generally frustoconical.

[0042] The positioning post 12 is designed in the shape of a frustum, which can play a guiding role when installing the vibrating wheel, and at the same time reduce the probability of collision between the vibrating wheel and the positioning post 12, and reduce the wear of the vibrating wheel due to friction. The middle part of the positioning post 12 is provided with sufficient rigidity by means of a combination of rib plates. The circular base 121 and the mounting hole of the side plate of the vibrating wheel are fitted with a clearance to achieve the initial positioning of the vibrating wheel. Further positioning is achieved by tightening the sealing nut 23.

[0043] The support 11 includes an upper support plate 111 and a lower support plate 112. The upper support plate 111 and the lower support plate 112 are fixedly connected as a whole by a vertically arranged connecting plate 113. At least three connecting plates 113 are arranged in a circular array along the circumference of the upper support plate 111 or the lower support plate 112.

[0044] By setting the support 11 as a combination of upper support 11, lower support 11 and connecting plate 113, the overall weight of the support 11 is increased, which makes the air tightness testing fixture more stable. At the same time, the central space can accommodate the connection between the air inlet pipe and the quick-change connector 5, providing it with a spacious operating and installation space.

[0045] A handle 7 is fixedly provided on the upper side of the sealing cover 21, and a set of handles 7 are symmetrically arranged along the diameter direction of the sealing cover 21.

[0046] To facilitate the installation and removal of the sealing cover 21, a handle 7 is provided to make the installation and removal process more convenient.

[0047] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0048] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vibration wheel air tightness detection tool, characterized in that: It includes lower positioning assembly (1) and upper sealing assembly (2), the lower positioning assembly (1) includes support (11) and the positioning column (12) fixedly arranged on the upper side of support (11), the positioning column (12) outer diameter is less than the inner diameter of the vibration wheel side plate mounting hole, the upper sealing assembly (2) includes sealing cover (21), the outer diameter of which is greater than the inner diameter of the vibration wheel side plate mounting hole, the positioning screw rod (22) is arranged through the sealing cover (21), the sealing nut (23) is threadedly connected to the upper end of the positioning screw rod (22), and the lower end is threadedly connected with the top end of the positioning column (12); The sealing cover (21) and the corresponding vibration wheel side plate are provided with first silica gel gasket (3) and second silica gel gasket (4) respectively, and the support (11) and the corresponding vibration wheel side plate are provided with first silica gel gasket (3) and second silica gel gasket (4) respectively; The quick connector (5) is arranged through the positioning column (12) and communicated with the inner cavity of the vibration wheel from bottom to top, the quick connector (5) is communicated with the external high-pressure gas tank, the pressure relief valve (24) and the pressure measuring table (25) are arranged through the sealing cover (21) and communicated with the inner cavity of the vibration wheel.

2. The vibration wheel air tightness detection tooling of claim 1, wherein: The safety valve (26) is also arranged through the sealing cover (21) and communicated with the inner cavity of the vibration wheel.

3. The vibratory wheel air tightness detection tool of claim 1, wherein: The sealing nut (23) and the sealing cover (21) are provided with silica gel sealing ring (27) sleeved outside the positioning screw rod (22).

4. The vibratory wheel air tightness detection tool of claim 1, wherein: The positioning silica gel pad (6) is arranged between the support (11) and the adjacent vibration wheel side plate and fixedly installed on the support (11), the positioning silica gel pad (6) is arranged outside the second silica gel gasket (4) region and at least two are arranged in circular array along the circumferential direction of the second silica gel gasket (4).

5. The vibratory wheel air tightness detection tool of claim 1, wherein: The positioning column (12) includes a circular base (121) matched with the inner side of the vibration wheel side plate mounting hole, a connecting portion (122) threadedly connected with the positioning bolt, and at least three connecting rib plates (123) arranged between the base (121) and the connecting portion (122) in circular array, and the outer diameter of the connecting portion (122) is smaller than the outer diameter of the base (121), and the whole positioning column (12) is in the form of a truncated cone.

6. The vibratory wheel air tightness detection tool of claim 1, wherein: The support (11) includes an upper support plate (111) and a lower support plate (112), and the upper support plate (111) and the lower support plate (112) are fixedly connected into an integrated body by a vertically arranged connecting plate (113), and at least three connecting plates (113) are arranged in circular array along the circumferential direction of the upper support plate (111) or the lower support plate (112).

7. The vibratory wheel air tightness detection tool of claim 1, wherein: A handle (7) is fixedly arranged on the upper side of the sealing cover (21), and the handle (7) is symmetrically arranged in a group along the diameter direction of the sealing cover (21).

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