CN214407908U

CN214407908U - Airtight test tool of casing part

Info

Publication number: CN214407908U
Application number: CN202120626242.7U
Authority: CN
Inventors: 王勇; 蒋建明; 于金玲; 张学庆; 冶尚容
Original assignee: Shaanxi Aircraft Industry Co Ltd
Current assignee: Shaanxi Aircraft Industry Co Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-10-15
Anticipated expiration: 2031-03-26

Abstract

The utility model belongs to the technical field of the aviation pipe is made, a airtight test instrument of casing part is disclosed, mainly include butterfly nut, screw rod, packing ring, sealing washer. The small end of the shell part consists of a screw, a gasket, a sealing ring and a butterfly nut of the tool to form a screwing mechanism, and the small end is sealed by the gasket; the main aspects of the shell parts are connected with the air inlet end of the airtight test bed, so that the sealing performance of the inner space of the shell parts is guaranteed, and in the test, whether the surface of the shell parts has air bubbles or not is judged by observing whether the surface of the shell parts has the defects of air holes or not in a water tank. And after the test is qualified, assembling and welding procedures are carried out, so that the yield of the catheter manufacturing is improved.

Description

Airtight test tool of casing part

Technical Field

The utility model belongs to the technical field of the aviation pipe is made, concretely relates to airtight test instrument of casing part.

Background

Currently, there is a casing part, as shown in fig. 2, which is welded with a conduit to form a system pipeline, and the system pipeline is located in the integral oil tank of a certain type airplane wing and used for connecting the oil pump line. One end of the conduit is connected with the through-way in a flaring mode, and the other end of the conduit is a shell part and is connected with a finished product oiling pump through a screw. In the current production, after the pipe is bent and formed, the shell part is arranged on an oil pump, the welding position of the shell part and the pipe is determined, the shell part and the pipe are welded after marking, and the pipe is subjected to an air tightness test after welding. And (5) installing the machine after the airtight test is qualified. However, in actual production, it is often found in an air-tight test that the surface of the housing part leaks air, which results in product rejection, which affects the lead time of the product and causes waste in terms of material, man-hour, etc.

Disclosure of Invention

In order to solve the problem, the utility model provides an airtight test instrument of casing part utilizes before this part and pipe assembly, welding process the utility model discloses an instrument is tested, carries out other processes after airtight test is qualified, has avoided delivering to drag phase and material extravagant.

The technical scheme of the utility model is that: an air tightness test tool for a shell part comprises a limiting device, a screw rod, a supporting seat and a sealing ring, wherein the outer surface of the screw rod is matched with the inner surface of the small end of the shell part, the inner surface of the supporting seat is matched with the outer surface of the small end of the shell part, the top of the screw rod is connected with a rod body, the top of the supporting seat is provided with a through hole for the rod body to pass through, and the limiting device is arranged on the rod body to limit the relative position of the supporting seat and the screw rod; the lower end of the screw rod is provided with a step, and a first sealing ring is arranged at the joint of the step at the lower end of the screw rod and the shell part.

Furthermore, the limiting device is a nut, and the rod body at the top of the screw rod is a threaded rod.

Further, the limiting device is a butterfly nut.

Furthermore, a second sealing ring is arranged at the joint of the lower end of the supporting seat and the upper surface of the shell part. The second seal ring mainly serves to protect the upper surface of the housing part.

Furthermore, a step is arranged at the lower end of the supporting seat, and a second sealing ring is arranged at the joint of the step at the lower end of the supporting seat and the upper surface of the shell part. The area of the second sealing ring can be enlarged through the step, and a better protection effect is achieved.

Furthermore, the height of the inner surface of the supporting seat is slightly higher than that of the small end of the shell part. When the tool is mounted on the shell part, a gap is formed between the upper surface of the small end of the shell part and the top of the inner surface of the supporting seat, and abrasion is avoided.

The utility model has the advantages that: the shell part is subjected to gas tightness test before being assembled and welded with the guide pipe, so that the product drag period and material waste are avoided; the screw rod is matched with the butterfly nut, the small end of the shell part is sealed, and the sealing ring is tightly attached to the small end of the shell, so that the airtight effect is ensured; the height of the washer is larger than that of the small end of the shell part, and the small end is guaranteed not to be damaged in the stress process of the butterfly nut. After the air-tight test is qualified, the shell part is connected with the oiling pump, the guide pipe is assembled and welded after being bent and formed, and then the subsequent procedures are carried out, so that the qualification rate of the guide pipe is improved.

Drawings

FIG. 1 is a schematic view of a tool of the present invention;

FIG. 2 is a view showing the outer shape of the case part to be tested for airtightness according to the present invention;

fig. 3 is an outline view of a wing nut according to an embodiment of the present invention;

FIG. 4 is a view of the supporting seat of the embodiment of the present invention;

FIG. 5 is a view of the screw profile of an embodiment of the present invention;

wherein: 1-butterfly nut, 2-screw rod, 3-supporting seat, 4-1-first sealing washer, 4-2-second sealing washer, 5-casing part.

Detailed Description

This section is an embodiment of the present invention for explaining and explaining the technical solution of the present invention.

An air tightness test tool for a shell part comprises a limiting device, a screw rod 2, a supporting seat 3 and a sealing ring 4, wherein the outer surface of the screw rod 2 is matched with the inner shape surface of the small end of the shell part 5, the inner surface of the supporting seat 3 is matched with the outer shape surface of the small end of the shell part 5, the top of the screw rod 2 is connected with a rod body, a through hole for accommodating the rod body to pass through is formed in the top of the supporting seat 3, and the limiting device is arranged on the rod body to limit the relative position of the supporting seat 3 and the screw rod 2; the lower end of the screw rod 2 is provided with a step, and a first sealing ring 4-1 is arranged at the joint of the step at the lower end of the screw rod 2 and the shell part 5.

The limiting device is a nut, and the rod body at the top of the screw rod 2 is a threaded rod.

The limiting device is a butterfly nut 1.

A second sealing ring 4-2 is arranged at the joint of the lower end of the supporting seat 3 and the upper surface of the shell part 5. The second seal ring 4-2 mainly functions to protect the upper surface of the housing part 5.

The lower end of the supporting seat 3 is provided with a step, and the second sealing ring 4-2 is arranged at the joint of the step at the lower end of the supporting seat 3 and the upper surface of the shell part 5. The area of the second sealing ring 4-2 can be enlarged through the step, and a better protection effect is achieved.

The height of the inner surface of the supporting seat 3 is slightly higher than the height of the small end of the shell part 5. When the tool is mounted on the housing part, a gap is ensured between the upper surface of the small end of the housing part 5 and the top of the inner surface of the support seat 3, and no abrasion is generated.

Another embodiment of the present invention is described below with reference to the drawings.

As shown in figure 1, the support seat 3 is sleeved at the small end of the shell part, the screw rod 2 penetrates out of the small end of the shell part and extends out of the small end of the shell part, the butterfly nut 1 is matched with the screw rod 2, and the small end of the shell part is sealed after being screwed down.

The butterfly nut 1 is structured as shown in fig. 3, the support seat 3 is structured as shown in fig. 4, and the screw 2 is structured as shown in fig. 5.

Two sealing rings 4 are positioned on the inner surfaces of the screw rod and the supporting seat and are attached to the small end of the shell part, and after the nut is screwed down, the gasket is extruded, so that the effect of sealing the small end of the shell part is achieved on one hand, and the surface of the shell part is protected from being scratched on the other hand. The big end of the shell part is connected with the air-tight test bed, air is fed through the air inlet of the test bed to perform the air-tight test, and in the test, whether the surface of the shell part has the defects of sand holes and air holes or not can be judged by observing whether bubbles are generated on the surface of the shell part in the water tank or not.

Claims

1. The air tightness test tool for the shell part is characterized by comprising a limiting device, a screw rod (2), a supporting seat (3) and a sealing ring (4), wherein the outer surface of the screw rod (2) is matched with the inner shape surface of the small end of the shell part (5), the inner surface of the supporting seat (3) is matched with the outer shape surface of the small end of the shell part (5), the top of the screw rod (2) is connected with a rod body, a through hole for the rod body to penetrate through is formed in the top of the supporting seat (3), and the limiting device is arranged on the rod body to limit the relative positions of the supporting seat (3) and the screw rod (2); the lower end of the screw rod (2) is provided with a step, and a first sealing ring (4-1) is arranged at the joint of the step at the lower end of the screw rod (2) and the shell part (5).

2. The airtightness test tool for casing parts according to claim 1, wherein the limiting means is a nut, and the rod body at the top of the screw (2) is a threaded rod.

3. The airtightness test tool for casing parts according to claim 2, wherein said limiting means is a wing nut (1).

4. The airtightness test tool for the casing part according to claim 1, wherein a second sealing ring (4-2) is provided at a joint between a lower end of the support base (3) and an upper surface of the casing part (5).

5. The airtightness test tool for the casing part according to claim 4, wherein the lower end of the support base (3) is provided with a step, and the second sealing ring (4-2) is provided at a joint of the step at the lower end of the support base (3) and the upper surface of the casing part (5).

6. The airtightness testing tool for the casing member according to claim 1, wherein the height of the inner surface of the supporting seat (3) is slightly higher than the height of the small end of the casing member (5).