阅读说明：本技术 一种便携式气密性检测装置 (Portable air tightness detection device ) 是由 金容� 付喜龙 钱高杰 沈金弟 赵海峰 邬一鸣 李凯 于 2021-01-29 设计创作，主要内容包括：本发明提供了一种便携式气密性检测装置,包括在外侧套设有密封组件和套筒的中空的导柱,所述导柱靠近所述密封组件的一端设有限位块,其靠近所述套筒的一端设有压紧装置,工作时,将所述导柱插入待测加工孔中,所述压紧装置驱动所述套筒压紧密封组件,实现对待测区域的密封。本发明的有益之处在于,可在整体气密性检测前或缸孔珩磨前,对加工孔中某一个可能存在泄漏风险的局部位置进行泄漏检测,从而避免珩磨后不能浸渗所导致的产品报废,避免产线改造带来的成本,减少加工线的产能浪费。(The invention provides a portable air tightness detection device which comprises a hollow guide pillar, wherein a sealing assembly and a sleeve are sleeved on the outer side of the hollow guide pillar, a limiting block is arranged at one end, close to the sealing assembly, of the guide pillar, a pressing device is arranged at one end, close to the sleeve, of the guide pillar, when the portable air tightness detection device works, the guide pillar is inserted into a to-be-detected machining hole, the pressing device drives the sleeve to press the sealing assembly, and sealing of a to-be-detected area is achieved. The invention has the beneficial effects that before the integral air tightness detection or the cylinder hole honing, the leakage detection can be carried out on a local position in a processing hole, which possibly has a leakage risk, so that the product scrapping caused by the incapability of infiltration after honing is avoided, the cost brought by the modification of a production line is avoided, and the capacity waste of the processing line is reduced.)

1. The portable air tightness detection device is characterized by comprising a hollow guide pillar (1) which is sleeved with a sealing assembly and a sleeve on the outer side, wherein a limiting block (11) is arranged at one end, close to the sealing assembly, of the guide pillar (1), a pressing device is arranged at one end, close to the sleeve, of the guide pillar (1), the guide pillar (1) is inserted into a machining hole to be detected during working, the pressing device drives the sleeve to press the sealing assembly tightly, and sealing of a region to be detected is achieved.

2. The tightness detection device according to claim 1, characterized in that said sealing assembly comprises a first sealing ring (61), a sealing portion (5) and a second sealing ring (62), said sealing portion (5) being provided with an opening, and an opening (12) being provided correspondingly at the position of said guide post (1) where said sealing portion (5) is mounted.

3. The airtightness detection apparatus according to claim 1, wherein the sleeve comprises a first sleeve (2) and a second sleeve (4), the first sleeve (2) and the second sleeve (4) are respectively disposed on two sides of a limiting portion (3), and the limiting portion (3) is sleeved on the guide pillar (1) and used for protecting an end surface of a to-be-processed hole.

4. The tightness detection device according to claim 3, characterized in that said compression means comprise two eccentric wheels (7), said two eccentric wheels (7) being rotatably mounted in said guide post (1) at an end close to said second sleeve (4) and abutting against said second sleeve (4); a handle (9) is connected between the two eccentric wheels (7).

5. The tightness detection device according to claim 3, characterized in that the stopper (3) is made of rubber.

6. The tightness detection device according to claim 1, characterized in that said guide posts (1) are connected to a leak tester.

7. The airtightness detection apparatus according to claim 6, wherein the leak tester is connected to an air compression station.

Technical Field

The invention relates to an air tightness detection device, in particular to a portable air tightness detection device for processing a through hole.

Background

The dividing wall between a balance shaft hole (low pressure) of a certain high-pressure casting cylinder body and a main oil duct inclined oil supply hole (high pressure) is thick, and a blank casting is easy to shrink in holes, so that the high-pressure sealing detection is unqualified finally (the high-pressure sealing requirement is 6 cc/min). In practice, the rejection rate, which is caused only by defects in this region, is as high as 20%, with leakage values of over 80% all being less than 50 cc/min. According to the requirement of customers, products with the leakage value of less than 50cc/min can be repaired to be qualified through the infiltration process and then used, but the machining process belongs to a finishing process, and the infiltration process is not planned on a finishing line. In addition, the existing air-tight seal detection process is arranged after the cylinder liner honing process, but infiltration repair is not allowed after the cylinder liner is honed to avoid influencing the size of the processing surface of the cylinder hole, so that in actual production, when the air-tight seal detection process judges that a part is a leakage part, infiltration repair cannot be carried out on the part.

Disclosure of Invention

In view of the above-mentioned drawbacks, an object of the present invention is to provide a portable air-tightness detection device, which can detect the air-tightness of a risk part in time without modifying a processing line, and thus enable subsequent infiltration repair.

The invention provides a portable air tightness detection device which comprises a hollow guide pillar, wherein a sealing assembly and a sleeve are sleeved on the outer side of the hollow guide pillar, a limiting block is arranged at one end, close to the sealing assembly, of the guide pillar, a pressing device is arranged at one end, close to the sleeve, of the guide pillar, when the portable air tightness detection device works, the guide pillar is inserted into a to-be-detected machining hole, the pressing device drives the sleeve to press the sealing assembly, and sealing of a to-be-detected area is achieved.

Preferably, the sealing assembly comprises a first sealing ring, a sealing portion and a second sealing ring, the sealing portion is provided with an opening, and the position of the guide pillar where the sealing portion is installed is correspondingly provided with an opening.

Preferably, the sleeve comprises a first sleeve and a second sleeve, the first sleeve and the second sleeve are respectively arranged on two sides of a limiting portion, and the limiting portion is sleeved on the guide pillar and used for protecting the end face of the to-be-machined hole.

Preferably, the pressing device comprises two eccentric wheels, and the two eccentric wheels are rotatably installed at one end of the guide post close to the second sleeve and are abutted with the second sleeve; a handle is also connected between the two eccentric wheels.

Preferably, the limiting part is made of rubber.

Preferably, the guide post is connected to a leak tester.

Preferably, the leak tester is connected to an air compression station.

The invention has the beneficial effects that before the integral air tightness detection or the cylinder hole honing, the leakage detection can be carried out on a local position in a processing hole, which possibly has a leakage risk, so that the product scrapping caused by the incapability of infiltration after honing is avoided, the cost brought by the modification of a production line is avoided, and the capacity waste of the processing line is reduced.

Drawings

Fig. 1 is an exploded view of a portable airtightness detection apparatus according to the present invention;

fig. 2 is a perspective view of the portable airtightness detection apparatus according to the present invention.

Element number description:

1 guide post

11 limiting block

12 open pores

13 gas-filled bolt

2 first sleeve

21 open slot

3 limiting part

31 fixed pin

4 second sleeve

5 sealing part

61 first seal ring

62 second seal ring

7 eccentric wheel

81 rotating support rod

82 bolt

83 shim

9 handle

91 connecting rod

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 and 2, the invention provides a portable air tightness detection device, which comprises a hollow guide post 1, wherein a sealing assembly and a sleeve are sleeved outside the hollow guide post 1, a limiting block 11 is arranged at one end of the guide post 1 close to the sealing assembly, and a pressing device is arranged at one end of the guide post 1 close to the sleeve. And inserting the end of the sealing assembly into the processing hole to be detected, and driving the sleeve to compress the sealing assembly by the compressing device to realize the sealing of the region to be detected.

In an embodiment of the present invention, the sealing assembly includes a first sealing ring 61, a sealing portion 5 and a second sealing ring 62, the first sealing ring 61 abuts against the stopper 11, the sealing portion 5 is provided with an opening, and the position of the guide post 1 where the sealing portion 5 is installed is also correspondingly provided with an opening 12. The sleeve includes first sleeve 2 and second sleeve 4, and first sleeve 2 and second sleeve 4 set up the both sides at a spacing portion 3 respectively, and spacing portion 3 is fixed on guide pillar 1 to spacing portion 31 of fixing pin 31 passing spacing portion 3 and fluting 21 on the first sleeve 2 in proper order. Due to the presence of the slot 21, the first sleeve 2 can be displaced a certain distance in the direction of the sealing assembly under the push of the second sleeve 4. Preferably, the limiting portion 3 is made of rubber, and can protect the end face of the machined hole after finishing machining and prevent damage to the end face.

The pressing device comprises two eccentric wheels 7, and the two eccentric wheels 7 are rotatably mounted at one end of the guide post 1 close to the second sleeve 4 through a rotating support rod 81 and abut against the second sleeve 4. A handle 9 is also connected between the two eccentrics 7 by a bolt 82 and a washer 83.

The guide pillar 1 is connected with a leakage tester through an inflating bolt 13, the leakage tester is connected with an air compression station, and the air compression station is used as an air source.

During operation, stretch into the device and await measuring in the processing hole, operating personnel promotes handle 9, drives two eccentric wheels 7 and rotates, and two eccentric wheels 7 promote second sleeve 4, and second sleeve 4 compresses tightly first sealing washer 61, sealing part 5 and second sealing washer 62 to stopper 11 department through first sleeve 2 for the region that awaits measuring forms a sealed space. And then starting a leakage tester, enabling air with certain pressure to enter a sealed space between the first sealing ring 61 and the second sealing ring 62 through the opening 12 on the guide post 1 and the opening on the sealing part 5, and obtaining the leakage amount through the attenuation of the differential pressure measured by the leakage tester.

According to the invention, through the air tightness detection device with simple structure and small occupied space, the air tightness performance of a certain risk hole can be detected on a processing line or beside a machine tool, and whether parts need to be infiltrated and repaired is judged before a cylinder hole honing process, so that the defect of insufficient air tightness detection station is overcome, and the rejection rate of products is reduced.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.