An internally braced air tight test valve

Abstract

The utility model discloses an inner support airtight test valve relates to airtightness detection technical field, including the body, the body includes the breather pipe, sealing assembly, top block and driving part, one end of breather pipe is set for the insertion end of the air inlet hole of the product to be detected, sealing assembly and top block are in proper order and are set in the insertion end outside of breather pipe, driving part is used for driving top block moves along the axial movement of breather pipe to make top block extrude sealing assembly, and sealing assembly produces radial expansion to seal air inlet hole. Provide a kind of compact structure, easy operation, reliable sealing and the inner support airtight test valve of no damage to product. The test valve can realize radial expansion sealing from the inside of product air inlet hole, thereby efficiently, losslessly complete airtight test preparation work.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, specifically to an internal support airtightness test valve. Background Technology

[0002] In industrial production, airtightness testing of various products with cavities is a crucial process for ensuring their quality. Traditional sealing test methods involve using external clamps to clamp or wrap the product from the outside to achieve a seal. External clamping sealing methods often require complex clamping mechanisms and significant force, which can easily cause damage such as indentations and scratches on the product's outer surface. This method is particularly unsuitable for products with high surface treatment requirements or made of soft materials.

[0003] Therefore, the industry needs a specialized tool that can quickly, non-destructively, and reliably seal the inner bore of a product to improve testing efficiency, protect the product's appearance, and ensure the accuracy of test results. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing airtightness testing sealing methods, such as easy damage to products, complex operation, and insufficient reliability, and to provide an internally supported airtightness testing valve that is compact in structure, easy to operate, provides reliable sealing, and does not damage the product. This testing valve can achieve radial expansion sealing from inside the product's air inlet, thereby efficiently and non-destructively completing the airtightness testing preparation work.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An internally supported airtightness test valve includes a body, which includes a vent pipe, a sealing assembly, a top block, and a driving component. One end of the vent pipe is configured as an insertion end for inserting into the air inlet of the product to be tested. The sealing assembly and the top block are sequentially sleeved outside the insertion end of the vent pipe. The driving component is used to drive the top block to move axially along the vent pipe, so that the top block squeezes the sealing assembly, causing the sealing assembly to expand radially to seal the air inlet.

[0006] Furthermore, the drive component includes a connecting block and a handle. The connecting block has a locking hole for fasteners to pass through and connect to an external base. The connecting block is spirally connected to a vent pipe. The handle is rotatably connected to the connecting block. The handle has an arcuate portion. When the handle swings, the arcuate portion can abut against and push the top block to move along its axial direction.

[0007] Furthermore, the vent pipe includes an integrally formed threaded section and a T-shaped section, the T-shaped section constituting the insertion end; the sealing assembly and the top block are sleeved outside the T-shaped section, and the connecting block is sleeved outside the threaded section and threadedly engaged with the threaded section.

[0008] Furthermore, the T-shaped platform section is provided with radially protruding bosses for axially positioning the sealing assembly.

[0009] Furthermore, the sealing assembly includes at least one sealing ring and a plurality of gaskets fitted onto the T-shaped section, with the sealing ring sandwiched between two gaskets.

[0010] Furthermore, the number of gaskets is three, and the sealing ring is disposed between two of the gaskets.

[0011] Furthermore, the vent pipe is provided with an axially penetrating vent hole inside.

[0012] Furthermore, the connecting block and the handle are rotatably connected by a pin.

[0013] Compared with existing technologies, the technical solution of this patent achieves the following beneficial effects: 1. It adopts the principle of radial expansion sealing from the inside of the air inlet of the product to be inspected. The sealing force is applied from the inside to the outside, which completely avoids the damage to the outer surface of the product that may be caused by traditional external clamping or end face pressing methods. It is especially suitable for products with high appearance requirements.

[0014] 2. The drive mechanism enables quick locking and releasing that can be completed with one hand, making operation labor-saving and intuitive, and significantly improving the efficiency of test preparation and disassembly.

[0015] 3. The sealing ring is subjected to uniform axial pressure and deformation constraint by the top block and gasket, which ensures that the sealing ring produces regular and controllable radial expansion, fits tightly and uniformly with the hole wall, has good sealing repeatability and high reliability.

[0016] 4. The vent pipe adopts an integrated functional partition design of threaded section and T-shaped section, which has good structural rigidity; key components such as sealing components have bosses for axial positioning; the sealing ring is protected by gaskets, reducing abnormal wear and extending the overall tool life. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the internal support airtightness test valve of this utility model; Figure 2 This is a side view of the internal support airtightness test valve of this utility model. Figure 3 This is a schematic diagram of the disassembled assembly structure of the internal support airtightness test valve of this utility model; Figure 4 This is a schematic diagram of the working state (seal establishment state) of the internal support airtightness test valve of this utility model.

[0018] In the diagram: 1. Product to be inspected; 101. Air inlet; 2. Body; 201. Vent pipe; 2011. Threaded section; 2012. T-shaped section; 2013. Boss; 2014. Vent; 202. Gasket; 203. Sealing ring; 204. Top block; 205. Connecting block; 206. Handle; 2061. Arc section. Detailed Implementation

[0019] 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.

[0020] like Figures 1 to 4 As shown, this embodiment provides a technical solution: an internally supported airtightness test valve, including a body 2. The body 2 includes a vent pipe 201, a sealing assembly, a top block 204, and a driving component. One end of the vent pipe 201 is configured as an insertion end for inserting into the air inlet 101 of the product to be tested. The sealing assembly and the top block 204 are sequentially sleeved outside the insertion end of the vent pipe 201. The driving component drives the top block 204 to move axially along the vent pipe 201, so that the top block 204 squeezes the sealing assembly, causing the sealing assembly to expand radially to seal the air inlet 101. By driving the top block 204 axially, the sealing assembly sleeved on the insertion end of the vent pipe 201 is squeezed, causing it to expand radially. This solution solves the problems of traditional sealing methods potentially damaging the product's appearance and being complex to operate. Its beneficial effect is that it provides an independent, dedicated tool that can achieve a seal from the inside to the outside of the product's air inlet 101. The sealing force originates from inside the tool, causing no additional damage to the external product, and it has strong versatility.

[0021] The driving component includes a connecting block 205 and a handle 206. The lower part of the connecting block 205 has a locking hole for fasteners to pass through and connect to the external base. The connecting block 205 is screwed to the vent pipe 201. The handle 206 is rotatably connected to the connecting block 205 and has an arcuate portion 2061. When the handle 206 swings, the arcuate portion 2061 can push the top block 204 to move axially. The connecting block 205 provides a mounting fulcrum and enables adjustment. The lever action of the handle 206 converts the swinging motion into a linear thrust on the top block 204. This provides the test valve with quick installation and fixation and extremely labor-saving one-handed operation. The top block 204 can be driven by a simple swing to achieve reliable sealing and release, greatly improving testing efficiency.

[0022] The vent pipe 201 includes an integrally formed threaded section 2011 and a T-shaped section 2012, with the T-shaped section 2012 forming the insertion end. The sealing assembly and top block 204 are fitted onto the outside of the T-shaped section 2012, and the connecting block 205 is fitted onto the outside of the threaded section 2011 and threadedly engages with it. This further defines the vent pipe 201 as specifically divided into the threaded section 2011 and the T-shaped section 2012. This structural division is clear: the threaded section 2011 is specifically used for adjustment in conjunction with the connecting block 205, while the T-shaped section 2012, as the insertion end and core working section, supports the sealing assembly and piston head 204. Its advantages are: functional zoning is achieved, the structure is compact and reasonable, the assembly relationship is clear, the threaded adjustment process does not interfere with the sealing components, and the stability and lifespan of the sealing assembly are guaranteed.

[0023] The T-shaped section 2012 is equipped with a radially protruding boss 2013 for axially positioning the sealing assembly. This boss 2013 acts as a non-movable mechanical stop for axially positioning the sealing assembly. Its beneficial effects are: providing a precise and robust mounting reference for the sealing assembly, preventing excessive lateral movement under pressure, ensuring the controllability and consistency of the direction and position of the seal ring 203's expansion under compression, thereby improving the reliability and repeatability of the seal.

[0024] The sealing assembly includes at least one sealing ring 203 and multiple gaskets 202 fitted onto the T-shaped section 2012, with the sealing ring 203 sandwiched between two gaskets 202. The gaskets 202, acting as force transmission media and forming limiters for the sealing ring, can more evenly transmit the axial pressure applied by the piston head 204 to the sealing ring 203 and constrain its axial deformation, promoting primarily radial and regular expansion, thus greatly extending the service life of the sealing ring and ensuring sealing quality.

[0025] There are three gaskets 202, and the sealing ring 203 is positioned between two of the gaskets 202. The advantage of this structure is that the two outer gaskets 202 symmetrically clamp the individual sealing ring 203, making the radial expansion of the sealing ring 203 more symmetrical and centered under axial pressure. This further optimizes the pressure distribution on the sealing surface, achieving the best sealing effect. The structure is simple and efficient.

[0026] The vent pipe 201 has an axially penetrating vent hole inside. This feature complements the vent pipe 201's internal axially penetrating vent hole. This is the core channel for achieving the airtightness test function. After a reliable mechanical seal is established, it provides a direct and unobstructed flow path for the test gas, enabling the inflation test process to be carried out quickly and without obstruction, ensuring the accuracy and efficiency of the test results.

[0027] The connecting block 205 and the handle 206 are rotatably connected by a pin. This provides a reliable and low-friction fulcrum, making the swinging motion of the handle 206 smooth, the force transmission efficiency high, and the structure simple, the manufacturing cost low, and the durability good.

[0028] The working principle of this utility model's internal support airtightness test valve is as follows: The entire test valve is fixed to the base of the test station via the locking hole on the connecting block 205. The vent pipe 201 is rotated to adjust the length of the extended T-section 2012, allowing it to be smoothly inserted into the air inlet 101 of the product to be inspected. At this time, the sealing assembly is located inside the air inlet 101. The operator swings the handle 206 inward (i.e., to the left). The handle 206 rotates around its hinge point, and its arc-shaped portion 2061 abuts against and pushes the top block 204 forward axially along the T-section 2012. The forward-moving top block 204 compresses the front gasket 202 and sealing ring 203 assembly. This causes the sealing ring 203, sandwiched between the two gaskets 202, to be axially compressed. Due to the constraint of the gaskets 202 and the limiting position of the boss 2013, the axial deformation of the sealing ring 203 is restricted, and its elastic material is forced to primarily expand radially outward, thereby tightly filling and adhering to the inner wall of the air inlet 101, forming a reliable air seal. After the seal is established, an external test gas source fills the inner cavity of the product under test 1 through the vent hole inside the vent pipe 201 and the sealed air inlet 101, and the airtightness test can then begin. It should be noted that the product under test 1 shown in the figure is only a partial structure. After the test is completed, swinging the handle 206 outwards causes the top block 204 to retract, the sealing ring 203 elastically contracts to return to its original shape, the seal is released, and the product can be removed.

Claims

1. An internally supported airtightness test valve, comprising a body (2), characterized in that, The body (2) includes a vent pipe (201), a sealing assembly, a top block (204), and a driving component; one end of the vent pipe (201) is configured as an insertion end for inserting into the air inlet (101) of the product to be inspected (1); the sealing assembly and the top block (204) are sequentially sleeved outside the insertion end of the vent pipe (201); the driving component is used to drive the top block (204) to move axially along the vent pipe (201) so that the top block (204) squeezes the sealing assembly, causing the sealing assembly to expand radially to seal the air inlet (101).

2. The internal support airtightness test valve according to claim 1, characterized in that, The drive unit includes a connecting block (205) and a handle (206). The lower part of the connecting block (205) is provided with a locking hole for fasteners to pass through and connect to the external base. The connecting block (205) is spirally connected to the vent pipe (201). The handle (206) is rotatably connected to the connecting block (205). The handle (206) is provided with an arc portion (2061). When the handle (206) swings, the arc portion (2061) can abut against and push the top block (204) to move along its axial direction.

3. The internal support airtightness test valve according to claim 2, characterized in that, The vent pipe (201) includes an integrally formed threaded section (2011) and a T-shaped section (2012), the T-shaped section (2012) constituting the insertion end; the sealing assembly and the top block (204) are sleeved on the outside of the T-shaped section (2012), and the connecting block (205) is sleeved on the outside of the threaded section (2011) and threadedly engaged with the threaded section (2011).

4. The internal support airtightness test valve according to claim 3, characterized in that, The T-shaped section (2012) is provided with a radially protruding boss (2013) for axially positioning the sealing assembly.

5. The internal support airtightness test valve according to claim 3 or 4, characterized in that, The sealing assembly includes at least one sealing ring (203) and a plurality of gaskets (202) fitted onto the T-stage section (2012), wherein the sealing ring (203) is sandwiched between two gaskets (202).

6. The internal support airtightness test valve according to claim 5, characterized in that, The number of gaskets (202) is three, and the sealing ring (203) is disposed between two of the gaskets (202).

7. The internal support airtightness test valve according to claim 1, characterized in that, The vent pipe (201) is provided with an axially penetrating vent hole (2014).

8. The internal support airtightness test valve according to claim 2, characterized in that, The connecting block (205) and the handle (206) are rotatably connected by a pin.

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