Sealing experiment tool for air cylinder

Abstract

The utility model relates to the technical field of air cylinder overhauling devices, in particular to a sealing experiment tool for an air cylinder. Comprising a base, a pressing plate, a sealing gasket and a check bolt. When the high and low pressure static sealing performance of the overhauled cylinder needs to be tested, the opening of the U-shaped groove of the base is placed upwards, then the two second planes of the end cover are clamped along the two parallel side walls of the U-shaped groove, the sealing gasket is placed on the vent hole, the pressing plate is connected to the opening of the U-shaped groove, the tightening bolt is rotated in the forward direction, and the sealing gasket is clamped on the vent hole. And the tightening bolt applies pressure to the sealing gasket, so that the sealing gasket compresses and blocks the vent hole. Afterwards, high-pressure gas with the set pressure value is introduced into the air cylinder through the air inlet pipe, the attenuation value of the pressure gauge is observed through the pressure gauge, and the air tightness of the air cylinder can be judged. The sealing experiment tool for the air cylinder is simple in structure, convenient to operate and high in experiment safety and reliability, and the experiment pressure can be ensured to meet the technical requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cylinder maintenance device, in particular to a sealing experiment tool for a cylinder. BACKGROUND

[0002] As an actuator of a cold air system, a cylinder is widely used in an aircraft cold air system, such as an aircraft switch hatch, an emergency jettison hatch, and a retractable speed brake. In the process of repairing the aircraft cylinder, the high and low pressure static sealing performance of the cylinder needs to be verified after repair. The cylinder itself has a small air hole.

[0003] In the related art, there is no special tool, and when the sealing experiment is performed, the high-pressure gas leaks through the air hole, making it difficult to maintain the experimental pressure to meet the technical requirements, affecting the product quality acceptance, and the experimental gas pressure value is large, which is dangerous.

[0004] Therefore, it is necessary to design a tool that can maintain the experimental pressure to meet the specified requirements when performing the high-pressure static sealing experiment of the cylinder. INVENTION CONTENTS

[0005] The present application provides a sealing experiment tool for a cylinder, which can solve the technical problem of gas leakage during the air tightness experiment of the cylinder after maintenance in the prior art. The technical solution is as follows:

[0006] A sealing experiment tool for a cylinder, the cylinder has a cylinder body and an end cover, the edge of the end cover has two first planes parallel to each other and two second planes parallel to each other, and the two first planes and the two second planes are perpendicular to each other, one of the first planes is provided with an air hole communicating with the inside of the end cover, and the other of the first planes is provided with an air inlet pipe communicating with the inside of the end cover, the sealing experiment tool comprises:

[0007] a base, the base has a U-shaped groove with an upward opening, the width of the U-shaped groove is equal to the distance between the two second planes, and the groove bottom of the U-shaped groove has a containing cavity extending to the groove bottom, the containing cavity is used to avoid the air inlet pipe;

[0008] a pressing plate, which is detachably connected to the opening of the U-shaped groove of the base, the distance between the lower surface of the pressing plate and the groove bottom of the U-shaped groove is greater than the distance between the two first planes; the middle part of the pressing plate has a first screw hole, and a clamping bolt is arranged in the first screw hole;

[0009] and a sealing gasket, which covers the air hole and is selectively abutted on the first plane of the end cover provided with the air hole by the clamping bolt.

[0010] Optionally, the pressing plate is provided with two first through holes located on two sides of the first screw hole, and the base is provided with two second screw holes; the sealing experiment tool further comprises two first bolts, and the pressing plate is connected with the base through the two first bolts.

[0011] Optionally, the sealing gasket is a polyurethane gasket or a rubber gasket.

[0012] Optionally, the end of the clamping bolt in contact with the sealing gasket is a third plane, and the flatness of the third plane is less than or equal to 0.005.

[0013] Optionally, the end of the clamping bolt in contact with the sealing gasket is concave.

[0014] Optionally, the end of the clamping bolt in contact with the sealing gasket is further rotationally connected with an abutting block, an abutting surface of the abutting block is a fourth plane, and the flatness of the fourth plane is less than or equal to 0.005.

[0015] Optionally, the end of the clamping bolt in contact with the sealing gasket is further rotationally connected with an abutting block, and the end of the abutting block in contact with the sealing gasket is concave.

[0016] Optionally, one end of the pressing plate is hinged to one end of the base, the other end of the pressing plate is provided with a second through hole, and the base is provided with a third screw hole corresponding to the second through hole.

[0017] The sealing experiment tool further comprises a second bolt, and the other end of the pressing plate is connected with the other end of the base through the second bolt.

[0018] The technical scheme provided by the embodiments has at least the following beneficial effects:

[0019] The sealing experiment tool for the air cylinder comprises a base, a pressing plate, a sealing gasket and a clamping bolt. When the high and low pressure static sealing performance of the overhauled air cylinder needs to be tested, the U-shaped groove of the base is placed with the opening facing upwards, the two second planes of the end cover are clamped into the two parallel side walls of the U-shaped groove, the sealing gasket is placed on the air hole, the pressing plate is connected to the opening of the U-shaped groove, the clamping bolt is rotated in the positive direction, the clamping bolt applies pressure to the sealing gasket, and the sealing gasket is pressed and sealed to the air hole. Then, the air cylinder is filled with high pressure gas with a set pressure value through the air inlet pipe, and the pressure decay value of the pressure gauge is observed to determine the air tightness of the air cylinder. The sealing experiment tool for the air cylinder has a simple structure and is easy to operate, can ensure that the experimental pressure meets the technical requirements, and has high safety and reliability.

[0020] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0022] Figure 1 is a perspective view of an end cover according to an embodiment of the present application;

[0023] Figure 2 is a perspective view of an end cover according to an embodiment of the present application;

[0024] Figure 3 is a front view of a sealing experiment tool for a cylinder according to an embodiment of the present application;

[0025] Figure 4 is a front view of a sealing experiment tool for a cylinder according to an embodiment of the present application, which is installed with an end cover of the cylinder;

[0026] Figure 5 is a side view of a sealing experiment tool for a cylinder according to an embodiment of the present application, which is installed with an end cover of the cylinder;

[0027] Figure 6 is a front view of a base in a sealing experiment tool for a cylinder according to an embodiment of the present application;

[0028] Figure 7 is a top view of a pressing plate in a sealing experiment tool for a cylinder according to an embodiment of the present application;

[0029] Figure 8 is a front view of one embodiment of a clamping bolt in a sealing experiment tool for a cylinder according to an embodiment of the present application;

[0030] Figure 9 is a front view of another embodiment of a clamping bolt in a sealing experiment tool for a cylinder according to an embodiment of the present application.

[0031] Explanation of reference signs

[0032] 1 - end cover; 101 - first plane; 102 - second plane; 103 - air hole; 104 - air inlet pipe; 2 - base; 201 - U-shaped groove; 202 - accommodating cavity; 203 - second screw hole; 3 - pressing plate; 301 - first screw hole; 302 - first through hole; 4 - clamping bolt; 401 - third plane; 402 - abutting block; 5 - sealing gasket; 6 - first bolt. DETAILED DESCRIPTION

[0033] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended for illustration and explanation of the present disclosure and are not intended to limit the present disclosure.

[0034] In the present disclosure, the orientation words such as "upper" and "lower" used herein generally refer to the "upper" and "lower" of the corresponding components in the direction of gravity in the use state, and "inner" and "outer" refer to the "inner" and "outer" relative to the outline of the corresponding component. In addition, the terms "first", "second", and the like used in the present disclosure are used to distinguish one element from another element, and do not have sequential or important meanings. In the following description, the same reference numerals in different drawings represent the same or similar elements unless otherwise explained.

[0035] The cylinder is the actuator of the cold air system and is widely used in the aircraft cold air system, such as opening and closing the cabin cover, emergency jettisoning the cabin cover, and retracting and extending the speed brake. During the repair of the aircraft cylinder, the high and low pressure static sealing of the cylinder after repair needs to be verified. However, when performing the high pressure sealing experiment, due to the fact that some cylinders have small air holes, there is no special tool, and when performing the sealing experiment, the experimental pressure leaks through the air hole, so that it is difficult to maintain the experimental pressure at the specified technical requirement, which affects the product quality acceptance.

[0036] According to the embodiments of the present application, referring to Figures 1 to 9 , a sealing experiment tool for a cylinder is provided.

[0037] Referring to Figure 1 and Figure 2 , the cylinder has a cylinder body and an end cover 1, the edge of the end cover 1 has two first planes 101 parallel to each other and two second planes 102 parallel to each other, and the two first planes 101 and the two second planes 102 are perpendicular to each other, one of the first planes 101 is provided with an air hole 103 communicating with the inside of the end cover 1, and the air hole 103 is the original hole of the end cover 1, and the other first plane 101 is provided with an air inlet pipe 104 communicating with the inside of the end cover 1, and the sealing experiment tool comprises a base 2, a pressing plate 3, a sealing gasket 5 and a clamping bolt 4.

[0038] Referring to Figures 3 to 6 , the base 2 has a U-shaped groove 201 opening upward, the width of the U-shaped groove 201 is equal to the distance between the two second planes 102, and the groove bottom of the U-shaped groove 201 has a containing cavity 202 extending to the groove bottom, and the containing cavity 202 is used for avoiding the air inlet pipe 104; in this way, the two second planes 102 of the end cover 1 are just clamped into the U-shaped groove 201.

[0039] Referring to Figure 3 andFigure 7 As shown in the drawings, the pressing plate 3 is detachably connected to the opening of the U-shaped groove 201 of the base 2, the distance between the lower surface of the pressing plate 3 and the groove bottom of the U-shaped groove 201 is greater than the distance between the two first planes 101; the middle part of the pressing plate 3 is provided with a first screw hole 301, and a fastening bolt 4 is arranged in the first screw hole 301.

[0040] Referring to Figure 3 and Figure 4 As shown in the drawings, the sealing gasket 5 covers the vent hole 103 and is selectively abutted against the first plane 101 of the end cover 1 provided with the vent hole 103 through the fastening bolt 4.

[0041] In the above embodiment, when the high and low pressure static sealing performance of the overhauled cylinder needs to be tested, first, the U-shaped groove 201 of the base 2 is placed with the opening upward, then the two second planes 102 of the end cover 1 are clamped into the two parallel side walls of the U-shaped groove 201, the sealing gasket 5 is placed on the vent hole 103, the pressing plate 3 is connected to the opening of the U-shaped groove 201, and the fastening bolt 4 is rotated in the forward direction, the fastening bolt 4 applies pressure to the sealing gasket 5, so that the sealing gasket 5 is pressed and blocks the vent hole 103. Then, high pressure gas with a set pressure value is introduced into the cylinder through the air inlet pipe 104, and the pressure decay value of the pressure gauge is observed through the pressure gauge, so that the air tightness of the cylinder can be judged. The sealing test tool for the cylinder of the present application has a simple structure and is easy to operate, which can ensure that the experimental pressure meets the technical requirements and has high safety and reliability.

[0042] According to an embodiment of the present application, referring to Figure 3 , Figure 4 and Figure 7 As shown in the drawings, the pressing plate 3 is provided with two first through holes 302 located on both sides of the first screw hole 301, and the base 2 is provided with two second screw holes 203; the sealing test tool further comprises two first bolts 6, and the pressing plate 3 is connected to the base 2 through the two first bolts 6.

[0043] According to the embodiment of the present application, the sealing gasket 5 is a polyurethane gasket or a rubber gasket. In other embodiments, the sealing gasket 5 can also be selected from other flexible materials, which are not limited in the present application.

[0044] According to the embodiment of the present application, referring to Figure 8 As shown in the drawings, the end of the fastening bolt 4 in contact with the sealing gasket 5 is a third plane 401, and the flatness of the third plane 401 is ≤0.005. In this way, the sealing gasket 5 can be well attached to the first plane 101 of the end cover 1.

[0045] According to another embodiment of the present application, the end of the clinch bolt 4 in contact with the gasket 5 can also be concave. In this case, the lower end of the clinch bolt 4 can reliably abut against the first plane 101 of the end cover 1, thereby ensuring the sealing performance.

[0046] According to an embodiment of the present application, as shown in Fig. 9, the end of the clinch bolt 4 in contact with the gasket 5 is further rotatably connected with a stopper block 402, and the contact end of the stopper block 402 is concave. In this case, the lower end of the stopper block 402 can reliably abut against the first plane 101 of the end cover 1, thereby ensuring the sealing performance. Figure 9

[0047] According to an embodiment of the present application, as shown in Fig. 9, the end of the clinch bolt 4 in contact with the gasket 5 is further rotatably connected with a stopper block 402, and the contact end of the stopper block 402 is concave. In this case, the lower end of the stopper block 402 can reliably abut against the first plane 101 of the end cover 1, thereby ensuring the sealing performance.

[0048] According to an embodiment of the present application, in order to make the operation of the sealing experiment device for the cylinder simpler, one end of the pressing plate 3 is hingedly connected with one end of the base 2 (not shown in the drawings), the other end of the pressing plate 3 is provided with a second through hole (not shown in the drawings), and the base 2 is provided with a third screw hole (not shown in the drawings) corresponding to the second through hole; the sealing experiment tool further comprises a second bolt, and the other end of the pressing plate 3 is connected with the other end of the base 2 through the second bolt.

[0049] The implementation principle of the sealing experiment tool for the cylinder according to the present application will be described below in combination with actual operation steps:

[0050] Step 1: Place the U-shaped groove 201 of the base 2 with the opening facing upwards;

[0051] Step 2: Insert the two second planes 102 of the end cover 1 into the two parallel side walls of the U-shaped groove 201, connect the pressing plate 3 to the opening of the U-shaped groove 201, place the gasket 5 on the air hole 103, and rotate the clinch bolt 4 in the forward direction to press and seal the air hole 103.

[0052] Step 3: Pass high-pressure gas with a set pressure value into the cylinder through the air inlet pipe 104, and observe the attenuation value of the pressure gauge to determine the air tightness of the cylinder.​

[0053] The sealing experiment tool for the air cylinder is simple in structure, convenient to operate, can ensure that the experimental pressure reaches the specified technical requirements, and is high in safety and reliability.

[0054] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0055] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0056] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. A seal test tooling for a gas cylinder, characterized by, The cylinder has a cylinder body and an end cover (1), the edge of the end cover (1) has two first planes (101) and two second planes (102) which are parallel to each other, the two first planes (101) and the two second planes (102) are perpendicular to each other, one of the first planes (101) is provided with a vent hole (103) which is in communication with the inside of the end cover (1), the other of the first planes (101) is provided with an air inlet pipe (104) which is in communication with the inside of the end cover (1), and the sealing test tool comprises: a base (2) which has a U-shaped groove (201) which is open upward, the width of the U-shaped groove (201) is equal to the distance between the two second planes (102), the groove bottom of the U-shaped groove (201) has a containing cavity (202) which extends to the groove bottom, and the containing cavity (202) is used for avoiding the air inlet pipe (104); a pressing plate (3) which is detachably connected to the opening of the U-shaped groove (201) of the base (2), the distance between the lower surface of the pressing plate (3) and the groove bottom of the U-shaped groove (201) is greater than the distance between the two first planes (101); the middle part of the pressing plate (3) has a first screw hole (301), and a clamping bolt (4) is arranged in the first screw hole (301); and a sealing gasket (5) which covers the vent hole (103) and is selectively abutted against the first plane (101) of the end cover (1) where the vent hole (103) is arranged by the clamping bolt (4).

2. The seal test tooling for a gas cylinder of claim 1, wherein, The pressing plate (3) is provided with two first through holes (302) which are located on the two sides of the first screw hole (301), and the base (2) is provided with two second screw holes (203); the sealing test tool further comprises two first bolts (6), and the pressing plate (3) is connected with the base (2) by the two first bolts (6).

3. The seal test tooling for a gas cylinder of claim 1, wherein, The sealing gasket (5) is a polyurethane gasket or a rubber gasket.

4. The seal test tooling for an air cylinder of claim 1, wherein, The end of the clamping bolt (4) which is in contact with the sealing gasket (5) is a third plane (401), and the flatness of the third plane (401) is ≤0.

005.

5. The seal test tooling for an air cylinder of claim 1, wherein, The end of the clamping bolt (4) which is in contact with the sealing gasket (5) is concave.

6. The seal test tooling for an air cylinder of claim 1, wherein, The end of the clamping bolt (4) which is in contact with the sealing gasket (5) is further rotationally connected with an abutting block (402), the abutting surface of the abutting block (402) is a fourth plane, and the flatness of the fourth plane is ≤0.

005.

7. The seal test tooling for an air cylinder of claim 1, wherein, The end of the clamping bolt (4) which is in contact with the sealing gasket (5) is further rotationally connected with an abutting block (402), and the end of the abutting block (402) which is in contact with the sealing gasket (5) is concave.

8. The seal test tooling for an air cylinder of claim 1, wherein, One end of the pressing plate (3) is hinged to one end of the base (2), the other end of the pressing plate (3) is provided with a second through hole, the base (2) is provided with a third screw hole which corresponds to the second through hole; and the sealing test tool further comprises a second bolt, and the other end of the pressing plate (3) is connected with the other end of the base (2) by the second bolt.

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