Inner threaded hole airtightness detection connecting piece

Abstract

The utility model discloses an air tightness detection connecting piece for an internal threaded hole, which is used for quickly connecting the internal threaded hole of a product to be subjected to air tightness detection. The internal expansion connecting mechanism is arranged at one end of the cylinder body; the driving mechanism is arranged at the other end of the cylinder body and is connected with the internal expansion connecting mechanism; the internal expansion connecting mechanism is inserted into an internal threaded hole of the product, and the driving mechanism drives the internal expansion connecting mechanism to expand or contract so as to connect or loosen the product; and the connecting pipe is arranged on the surface of the cylinder body, communicates with the internal expansion connecting mechanism, and is connected with an external air source. The utility model can realize quick lossless connection with the internal threaded hole of the product, and has the advantages of good sealing property, high efficiency, exquisite structure and simplicity and convenience in use.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to an airtightness testing connector for internal threaded holes. Background Technology

[0002] In the industrial manufacturing sector, airtightness testing is a crucial aspect of product quality control. Conventional testing methods require pre-drilling test holes in the workpiece to connect to an air source device for pressure decay testing. However, current technology makes it difficult to directly connect an air source device to products with threaded test holes, or in other words, it cannot effectively achieve a seal at the connection point. Summary of the Invention

[0003] According to an embodiment of the present invention, a threaded hole airtightness testing connector is provided for quickly connecting to the threaded hole of a product whose airtightness is to be tested, comprising:

[0004] cylindrical body;

[0005] An internal expansion connection mechanism is located at one end of the cylinder.

[0006] The drive mechanism is located at the other end of the cylinder and is connected to the internal expansion connection mechanism.

[0007] The internal expansion connection mechanism is inserted into the internal threaded hole of the product, and the drive mechanism drives the internal expansion connection mechanism to expand or contract in order to connect or disconnect the product.

[0008] The connecting pipe is located on the surface of the cylinder and is connected to the internal expansion connecting mechanism. The connecting pipe is connected to an external air source.

[0009] Furthermore, the internal expansion connection mechanism includes: an expansion sleeve and a core puller;

[0010] The expansion sleeve is set at one end of the cylinder, with the bottom end of the expansion sleeve extending out of the cylinder and the top end of the expansion sleeve set inside the cylinder. The bottom end of the expansion sleeve has an inner conical surface with a gradually increasing inner diameter from the top end to the bottom end.

[0011] The core is inserted into the expansion sleeve. The top of the core is connected to the drive mechanism. The bottom of the core has an outer conical surface whose outer diameter gradually increases from the top to the bottom. The outer conical surface matches the inner conical surface.

[0012] The drive mechanism drives the core to move inside the expansion sleeve, causing the expansion sleeve to deform radially in order to connect or disconnect the product.

[0013] Furthermore, the outer surface of the expansion sleeve is provided with an external thread that engages with the internal threaded hole.

[0014] Furthermore, the expansion sleeve is composed of several expansion plates, with ventilation gaps between adjacent expansion plates.

[0015] Furthermore, the internal expansion connection mechanism also includes: a first sealing ring, which is disposed at one end of the cylinder and sleeved on the expansion sleeve, and the first sealing ring seals the cylinder and the product.

[0016] Furthermore, the drive mechanism includes: a sealing plate, a second sealing ring, a pressing unit, and a return spring;

[0017] The sealing plate is installed inside the cylinder and fixed to the core.

[0018] The second sealing ring is fitted onto the sealing plate, and the second sealing ring seals the cylinder and the sealing plate;

[0019] The pressing unit is connected to the top of the pulling core. The pressing unit drives the pulling core to move toward the bottom of the pulling core, extending out of the expansion sleeve and causing the expansion sleeve to contract radially.

[0020] The return spring is sleeved on the pull core, and its two ends are connected to the pull core and the inner wall of the cylinder, respectively. The return spring resets and drives the pull core to move toward the top of the pull core, where it is engaged in the expansion sleeve, causing the expansion sleeve to expand radially.

[0021] Furthermore, the pressing unit includes: a first link, a second link, and a grip;

[0022] One end of the first connecting rod is hinged to the other end of the cylinder;

[0023] The two ends of the second link are obliquely hinged to the pull core and the other end of the first link, respectively;

[0024] The grip is fixed diagonally downwards at the other end of the first link;

[0025] Grasp the handle and move it close to the cylinder, causing the first connecting rod to rotate, which in turn causes the second connecting rod and the core to move toward the bottom of the core.

[0026] Furthermore, the grip is integrally formed with the first connecting rod, and multiple arc-shaped grooves are spaced apart along the axial direction on the upper surface of the grip.

[0027] Furthermore, the pressing unit includes a pressing plate, which is fixed to the other end of the pull core. Pressing the pressing plate causes the pull core to move toward the bottom end of the pull core.

[0028] The internal thread hole airtightness testing connector according to the embodiment of this utility model can achieve a quick and non-destructive connection with the internal thread hole of the product, with good sealing performance, high efficiency, exquisite structure, and simple and convenient use.

[0029] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0030] Figure 1This is a schematic diagram of the first structure of the internal thread hole airtightness detection connector according to an embodiment of the present utility model;

[0031] Figure 2 This is a schematic diagram of the second structure of the internal thread hole airtightness detection connector according to an embodiment of the present utility model;

[0032] Figure 3 This is a cross-sectional schematic diagram of the internal thread hole airtightness detection connector according to an embodiment of the present utility model. Detailed Implementation

[0033] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0034] First, combine Figures 1-3 The present invention describes an internal thread hole airtightness testing connector according to an embodiment of the present invention, which is used to quickly connect the internal thread hole of a product whose airtightness is to be tested, and has a wide range of applications.

[0035] like Figures 1-3 As shown, the internal thread hole airtightness detection connector of this utility model embodiment includes: a cylinder 1; an internal expansion connection mechanism 2; a drive mechanism 3; and a connecting pipe 4.

[0036] Specifically, such as Figures 1-3 As shown, in this embodiment, the internal expansion connecting mechanism 2 is located at one end of the cylinder 1; the driving mechanism 3 is located at the other end of the cylinder 1 and is connected to the internal expansion connecting mechanism 2; the internal expansion connecting mechanism 2 is inserted into the internal threaded hole of the product, and the driving mechanism 3 drives the internal expansion connecting mechanism 2 to expand or contract to connect or release the product; the connecting pipe 4 is located on the surface of the cylinder 1 and is connected to the internal expansion connecting mechanism 2, and the connecting pipe 4 is connected to an external air source. The internal expansion structure controls radial deformation expansion through the driving mechanism 3, which can quickly complete the surface contact sealing connection with the internal threaded hole, achieve a fast and non-destructive connection, ensure the sealing performance of the connection with the internal threaded hole, significantly improve efficiency, and prevent the air source interface from causing wear on the internal thread of the product by directly connecting to the air source instead of the internal threaded hole, while ensuring the sealing performance of the connection. The overall structure is simple and compact, and easy to use.

[0037] Specifically, such as Figures 1-3As shown, in this embodiment, the internal expansion connection mechanism 2 includes an expansion sleeve and a pull core 22. The expansion sleeve is disposed at one end of the cylinder 1, with its bottom end extending out of the cylinder 1 for easy insertion into the internal threaded hole of the product. The top end of the expansion sleeve is disposed inside the cylinder 1, and the bottom end of the expansion sleeve has an inner conical surface 211 whose inner diameter gradually increases from the top end to the bottom end. The pull core 22 is inserted into the expansion sleeve, with its top end connected to the drive mechanism 3. The bottom end of the pull core 22 has an outer conical surface 221 whose outer diameter gradually increases from the top end to the bottom end, and the outer conical surface 221 cooperates with the inner conical surface 211. The drive mechanism 3 drives the pull core 22 to move within the expansion sleeve, causing the expansion sleeve to deform radially to connect or release the product. The outer conical surface 221 of the pull core 22 cooperates with the inner conical surface 211 of the expansion sleeve. The axial drive of the pull core 22 by the drive mechanism 3 is converted into radial deformation of the expansion sleeve, causing the expansion sleeve to engage in the internal threaded hole, realizing a quick and non-destructive connection between the cylinder 1 and the product, suitable for high-frequency testing scenarios.

[0038] Furthermore, such as Figures 1-3 As shown, in this embodiment, the outer surface of the expansion sleeve is provided with an external thread that engages with the internal threaded hole, and the thread engagement improves the connection effect and sealing performance.

[0039] Furthermore, such as Figures 1-3 As shown, in this embodiment, the expansion sleeve is formed by a number of expansion pieces 21. A ventilation gap 212 is provided between adjacent expansion pieces 21. When the pull core 22 is engaged in the expansion sleeve and the expansion sleeve is driven to expand radially, the ventilation gap 212 ensures that the gas output from the gas source can be smoothly delivered to the product.

[0040] Furthermore, such as Figures 1-3 As shown, in this embodiment, the inner expansion connection mechanism 2 further includes: a first sealing ring 23, which is disposed at one end of the cylinder 1 and sleeved on the expansion sleeve, and the first sealing ring 23 seals the cylinder 1 and the product.

[0041] Specifically, such as Figures 1-3As shown, in this embodiment, the driving mechanism 3 includes: a sealing plate 31, a second sealing ring 32, a pressing unit, and a return spring 33; the sealing plate 31 is disposed inside the cylinder 1 and fixed on the pull core 22; the second sealing ring 32 is sleeved on the sealing plate 31, and the second sealing ring 32 seals the cylinder 1 and the sealing plate 31; the pressing unit is connected to the top end of the pull core 22, and the pressing unit drives the pull core 22 to move toward the bottom end of the pull core 22, extending out of the expansion sleeve, and driving the expansion sleeve to contract radially; the return spring 33 is sleeved on the pull core 22, and the two ends of the return spring 33 are respectively connected to the pull core 22 and the inner wall of the cylinder 1, and the return spring 33 resets and drives the pull core 22 to move toward the top end of the pull core 22, engaging in the expansion sleeve, and driving the expansion sleeve to expand radially. The sealing plate 31 and the second sealing ring 32 ensure the sealing of the cylinder 1, so that the gas output from the gas source can be smoothly output from the expansion sleeve to the product. The pressing unit and the return spring 33 respectively realize the axial movement of the core 22 in opposite directions to realize the contraction and expansion of the expansion sleeve.

[0042] Furthermore, such as Figures 1-3 As shown, in this embodiment, the pressing unit includes: a first connecting rod 34, a second connecting rod 35, and a gripping rod 36; one end of the first connecting rod 34 is hinged to the other end of the cylinder 1; both ends of the second connecting rod 35 are obliquely hinged to the pull core 22 and the other end of the first connecting rod 34, respectively; the gripping rod 36 is obliquely fixed to the other end of the first connecting rod 34; in use, the user grips the gripping rod 36, causing the gripping rod 36 to move closer to the cylinder 1, causing the first connecting rod 34 to rotate, thereby causing the second connecting rod 35 and the pull core 22 to move towards the bottom end of the pull core 22. The first connecting rod 34, the second connecting rod 35, and the gripping rod 36 convert the manually input linear motion into the radial expansion of the expansion sleeve, making the drive quick and convenient, and the structure simple and reliable.

[0043] Furthermore, such as Figures 1-3 As shown, in this embodiment, the grip 36 and the first connecting rod 34 are integrally formed. The upper surface of the grip 36 is provided with a plurality of arc-shaped grooves 361 spaced along the axial direction to fit the fingertips of the human hand, improve grip comfort, and facilitate quick finger positioning.

[0044] Furthermore, such as Figures 1-3 As shown, in this embodiment, the pressing unit includes a pressing plate, which is fixed to the other end of the pull core 22. Pressing the pressing plate causes the pull core 22 to move toward the bottom end of the pull core 22.

[0045] Under normal conditions, due to the action of the return spring 33, the outer conical surface 221 of the pull core 22 engages with the inner conical surface 211 of the expansion sleeve, and the expansion sleeve is in a radially expanded state. When in use, hold the handle 36, and the pull core 22 is driven to move down through the first connecting rod 34 and the second connecting rod 35, compressing the return spring 33. The pull core 22 extends out of the expansion sleeve, and the expansion sleeve automatically retracts, which can be easily inserted into the internal threaded hole of the product. After insertion, until the first sealing ring 23 is in contact with the product, release the handle 36, and the return spring 33 automatically resets, driving the pull core 22 to move up and insert into the expansion sleeve, so that the expansion sleeve expands radially and engages in the internal threaded hole of the product, realizing the quick connection between the cylinder 1 and the product. The connecting pipe 4 is connected to the air source for airtightness testing.

[0046] Above, refer to Figures 1-3 This invention describes an internal thread hole airtightness testing connector according to an embodiment of the present invention, which can achieve a quick and non-destructive connection with the internal thread hole of a product, with good sealing performance, high efficiency, compact structure, and simple and convenient use.

[0047] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes that element.

[0048] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A female threaded hole hermeticity detection connector for quickly connecting a female threaded hole of a product to be detected for hermeticity, characterized by, The utility model relates to a kind of products of connecting and disconnecting, including: Barrel; Internal inflation connecting mechanism, the internal inflation connecting mechanism is arranged in one end of the barrel; Driving mechanism, the driving mechanism is arranged in the other end of the barrel, and is connected with the internal inflation connecting mechanism; The internal inflation connecting mechanism is inserted into the internal thread hole of the product, and the driving mechanism drives the internal inflation connecting mechanism to expand or contract, to connect or release the product; Connecting pipe, the connecting pipe is arranged on the surface of the barrel, and is communicated with the internal inflation connecting mechanism, and the connecting pipe is connected with external gas source.

2. The female threaded hole leak test adapter of claim 1, wherein, The internal inflation connecting mechanism includes: expansion sleeve and pull core; The expansion sleeve is arranged in one end of the barrel, the bottom end of the expansion sleeve extends from the barrel, the top end of the expansion sleeve is arranged in the barrel, the bottom end of the expansion sleeve has internal taper surface gradually increasing from top end to bottom end inner diameter; The pull core is inserted in the expansion sleeve, the top end of the pull core is connected with the driving mechanism, the bottom end of the pull core has external taper surface gradually increasing from top end to bottom end outer diameter, and the external taper surface is matched with the internal taper surface; The driving mechanism drives the pull core to move in the expansion sleeve, and drives the expansion sleeve to be radially deformed, to connect or release the product.

3. The female threaded hole leak test adapter of claim 2, wherein, The outer surface of the expansion sleeve is provided with external thread matched with the internal thread hole.

4. The female threaded hole leak test adapter of claim 2, wherein, The expansion sleeve is surrounded by several expansion sheets, and air gap is provided between adjacent expansion sheets.

5. A box leak test fitting according to any one of claims 2 to 4, wherein The internal inflation connecting mechanism further includes: first sealing ring, the first sealing ring is arranged in one end of the barrel, and is sleeved on the expansion sleeve, and the first sealing ring seals the barrel and the product.

6. The female threaded hole leak test adapter of claim 2, wherein, The driving mechanism includes: sealing plate, second sealing ring, pressing unit and return spring; The sealing plate is arranged in the barrel, and is fixed on the pull core; The second sealing ring is sleeved on the sealing plate, and the second sealing ring seals the barrel and the sealing plate; The pressing unit is connected with the top end of the pull core, the pressing unit drives the pull core to move towards the bottom end of the pull core, and the pull core extends from the expansion sleeve, drives the expansion sleeve to be radially contracted; The return spring is sleeved on the pull core, and the two ends of the return spring are respectively connected with the pull core and the inner wall of the barrel, the return spring drives the pull core to move towards the top end of the pull core, and the pull core is clamped in the expansion sleeve, drives the expansion sleeve to be radially expanded.

7. The female threaded hole leak test adapter of claim 6, wherein, The pressing unit includes: first connecting rod, second connecting rod and handle bar; One end of the first connecting rod is hingedly connected to the other end of the barrel; The two ends of the second connecting rod are respectively hingedly connected with the pull core and the other end of the first connecting rod; The handle bar is fixed to the other end of the first connecting rod obliquely downwards; Grasp the handle bar, drive the handle bar to be close to the barrel, drive the first connecting rod to rotate, thereby drive the second connecting rod and the pull core to move towards the bottom end of the pull core.

8. The female threaded hole leak test adapter of claim 7, wherein, The handle bar is integrally formed with the first connecting rod, and a plurality of arc grooves are arranged on the upper surface of the handle bar in axial direction.

9. The female threaded hole leak test adapter of claim 6, wherein, The pressing unit includes: pressing plate, the pressing plate is fixed to the other end of the pull core, and pressing the pressing plate drives the pull core to move towards the bottom end of the pull core.

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