Ball valve sealing testing apparatus

A testing device and sealing technology, which can be used in liquid/vacuum measurement for liquid tightness, and by measuring the acceleration and deceleration rate of fluid, etc., can solve the problems of uneven end face of ball valve, troublesome installation of ball valve, complicated operation process, etc. Achieve reasonable overall structure, improve sealing effect, and strengthen the effect of sealing effect

Inactive Publication Date: 2015-12-16
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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Embodiment 1

[0039] Embodiment 1: as Figure 1 to Figure 4 In the shown embodiment, a ball valve tightness testing device 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 surfaces, a main end cover 4, The auxiliary 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 of the push pedal cylinders is connected to the main end cover, and the piston rod of the other push pedal cylinder is connected to the auxiliary end cover. The surface of the main end cover near the ball valve support frame is provided with a Measure 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 ball valve support frame sid...

Embodiment 2

[0041] Embodiment 2: as Figure 5 to Figure 7 In the shown embodiment, a ball valve tightness testing device includes an air supply pump 13, an air pressure sensor, a main frame, two push plate cylinders, two side frames with opposite inner surfaces, 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. Two push plate cylinders are respectively arranged on the two side frames, and one of the push plate The piston rod of the cylinder is connected to the main end cover, and the piston rod of the other push plate cylinder is connected to the auxiliary end cover. The surface of the main end cover close to the ball valve support frame is provided with a main spring for contacting the pipe end of the tested ball valve. A sealing ring pad 7, the surface of the auxiliary end cover close to the ball valve support frame ...

Embodiment 3

[0049] Embodiment 3: the basic structure and implementation mode of this embodiment are the same as embodiment 2, and its difference is, as Figure 8 to Figure 11 As shown in: It also includes two anti-retraction cylinders 31, one of which is fixed on the main end cover through an anti-retraction bracket 32, and the other anti-retraction cylinder is fixed on the secondary end cover through an anti-retraction bracket , the anti-retraction cylinder is provided with a push plate piston 33 that can slide up and down in the anti-retraction cylinder, the described push plate piston is connected with the inner end of a disc piston rod 34, and the outer end of the disc piston rod is provided with There is a suction cup 35, and the described connecting disk piston rod is vertical, and the described pushing disk piston divides the anti-retraction cylinder where it is located into an air chamber 36 and an active chamber 37, and the described inflatable chamber is connected with an anti-re...

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Abstract

The invention discloses a ball valve sealing test apparatus, and provides a ball valve sealing testing apparatus that has advantages as convenient operation and high accuracy on test result, and two pipe ends of the ball valve can be ensured not to be easily clamped and damaged. The apparatus comprises an air feed pump, an air pressure sensor, a mainframe, two push pedal cylinders, two lateral frames, a main end cap, and an auxiliary end cap; the two push pedal cylinders are set on the two lateral frames respectively; one push pedal cylinder piston rod is connected with the main end cap and the other push pedal cylinder piston rod is connected with the auxiliary end cap; the main end cap has a main elastic sealing ring pad; the auxiliary end cap has an auxiliary elastic sealing ring plate; and the main end cap has a main cover pore. The beneficial effects of the present invention are that the positioning and clamping of the ball valve is perfect and the sealing can be ensured without clamping and damaging the ball valve; a sealing structure adaptive to adjusting is provided for enhancing the sealing effect when testing in high air pressure; an auxiliary positioning structure is provided to avoid the end cap from returning, so as to protect the push pedal cylinders, raise sealing effect, and maintain the stability in the process of test.

Description

technical field [0001] The invention belongs to the technical field of ball valve airtightness testing, and in particular relates to a ball valve airtightness testing device. 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 performa...

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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