Sealing testing machine

A testing machine and sealing technology, which can be used in the use of liquid/vacuum for liquid tightness measurement, and by measuring the acceleration and deceleration rates of fluids, etc., which can solve the problems of troublesome ball valve installation, complicated operation process, uneven end surface of ball valve, etc. Achieve the effect of improving the sealing effect, strengthening the sealing effect, and reasonable overall structure

Inactive Publication Date: 2015-12-09
宁波宇华实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned test method has the following disadvantages: 1. The operation process is complicated, and the weight of the frame is relatively heavy. It is necessary to immerse the frame in water with the help of external equipment, and the installation of the ball valve is also relatively troublesome; 2. The ball valve is sealed by pressing down the plate with a jack And when the sealing ring is placed outside the two ends of the ball valve and clamped on both ends of the ball valve by a hydraulic cylinder for sealing, th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1: as Figure 1 to Figure 4 In the embodiment shown, a tightness testing machine includes an air supply pump, an air pressure sensor 14, a main frame 1, two push plate cylinders 2, two side frames 3 with opposite inner sides, a main end cover 4, a secondary frame The end cover 5, the main end cover and the auxiliary end cover are parallel to each other, the main frame is provided with a ball valve support frame 6 for supporting the ball valve to be tested, and the two push plate cylinders are respectively arranged on the two side frames , the piston rod of one push plate cylinder is connected with the main end cover, and the piston rod of the other push plate cylinder is connected with the auxiliary end cover. The main elastic sealing ring pad 7 at the pipe end of the ball valve, the surface of the auxiliary end cover close to the side of the ball valve support frame is provided with a secondary elastic sealing ring plate 8 for contacting the pipe end of the bal...

Example Embodiment

[0041] Example 2: as Figure 5 to Figure 7 In the embodiment shown, a tightness testing machine includes an air supply pump 13, an air pressure sensor, a main frame, two push plate cylinders, two side frames with opposite inner sides, a main end cover, and a secondary end cover. The main end cover and the auxiliary end cover are parallel to each other, the main frame is provided with a ball valve support frame for supporting the ball valve to be tested, and two push plate cylinders are respectively arranged on the two side frames, one of which is a push plate cylinder. The piston rod is connected with the main end cover, and the piston rod of the other push plate cylinder is connected with the auxiliary end cover. The surface of the main end cover close to the ball valve support frame is provided with a main elastic seal for contacting the tube end of the ball valve under test. Ring gasket 7, a secondary elastic sealing ring plate 8 for contacting the pipe end of the ball valv...

Example Embodiment

[0049] Embodiment 3: The basic structure and implementation of this embodiment are the same as those of Embodiment 2, and the difference lies in that, such as Figure 8 to Figure 11 Shown in: it also includes two anti-return cylinders 31, one of which is fixed on the main end cover through an anti-return bracket 32, and the other anti-return cylinder is fixed on the auxiliary end cover through an anti-return bracket , the anti-return cylinder is provided with a push plate piston 33 that can slide up and down in the anti-return cylinder, the push plate piston is connected with the inner end of a receiving plate piston rod 34, and the outer end of the receiving plate piston rod is set There is a suction cup 35, the piston rod of the connecting plate is vertical, and the piston of the push plate divides the anti-return cylinder where it is located into an inflatable cavity 36 and an active cavity 37, and the inflatable cavity is connected to an anti-return air pipe 50. the outlet...

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PUM

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Abstract

The invention discloses a sealing testing machine and aims to provide the sealing testing machine which is convenient to operate, high in test result accuracy and capable of preventing two tube ends of a ball valve from being damaged by clamping. The sealing testing comprises an air feed pump, an air pressure sensor, a main frame, two push plate cylinders, two lateral frames, a main end cover and an auxiliary end cover. The two push plate cylinders are respectively arranged on the two lateral frames, wherein a piston rod of one push plate cylinder is connected with the main end cover, and a piston rod of the other push plate cylinder is connected with the auxiliary end cover. The main end cover is provided with a main elastic sealing ring pad. The auxiliary end cover is provided with an auxiliary elastic sealing ring plate. The main end cover is provided with a main cover air hole. The sealing testing has the advantages that the ball valve is positioned and clamped in position, the sealing performance is ensured, and the ball valve is prevented from being damaged by clamping; a sealing structure with a self-adaptive adjustment function is provided, and the sealing effect in a high pressure detection process is strengthened; in addition, an auxiliary positioning structure is provided, the end covers are prevented from returning, the push plate cylinders are protected, the sealing effect is improved, and the stability of the detection process is maintained.

Description

technical field [0001] The invention belongs to the technical field of airtightness testing of ball valves, and in particular relates to an airtightness testing machine. Background technique [0002] Ball valves are commonly used opening and closing parts for gas or liquid circulation. They are used in different occasions and have different sealing requirements. Therefore, they need to be tested for sealing before leaving the factory, otherwise there will be greater safety hazards. [0003] In the prior art, when testing a ball valve, a gasket or a sealing ring is usually placed on the outside of both ends of the ball valve, and at the same time, a force-applying device such as a jack or a hydraulic cylinder is used to clamp the two ends of the ball valve, so that the gasket or sealing ring and the ball valve are two The end is sealed, and the whole sealed ball valve is immersed in water, and then compressed gas is passed into the ball valve to test its sealing performance. ...

Claims

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Application Information

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IPC IPC(8): G01M3/28
Inventor 孙兆儿
Owner 宁波宇华实业股份有限公司
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