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Air-tightness detection device for composite steel-plastic pipe fitting

A technology for air tightness detection and composite section steel, which is applied in the use of liquid/vacuum degree for liquid tightness measurement, by detecting the appearance of fluid at the leak point, etc. Excessive force and other problems, to achieve the effect of accurate detection structure

Pending Publication Date: 2019-06-21
NINGBO HENGYUAN PRECISION VALVES TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned test method has the following disadvantages: it is difficult to control the force by squeezing and sealing both ends of the steel-plastic pipe fittings through the cylinder. If the force is too small, it is difficult to seal the ends of the steel-plastic pipe fittings; if the force is too large, it is easy to damage the steel-plastic pipe fittings.
Moreover, the sealing method of the end extrusion does not meet the international requirements, which is likely to cause misjudgment in detection

Method used

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  • Air-tightness detection device for composite steel-plastic pipe fitting
  • Air-tightness detection device for composite steel-plastic pipe fitting
  • Air-tightness detection device for composite steel-plastic pipe fitting

Examples

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Effect test

Embodiment

[0037] see figure 1 , figure 2 with image 3 , a composite type steel-plastic pipe fittings airtightness testing device, comprising a frame 1, a rectangular water tank 2 is welded on the frame 1, and the water tank 2 is filled with water 13 for testing the tightness of the steel-plastic conversion joint. A rectangular rotating plate 3 is pivotally connected to the short side on the right side of the opening end of the water tank 2. The lower end surface of the rotating plate 3 is welded with a pivot shaft 4, and the corresponding short side of the opening end of the water tank 2 is welded with a sleeve matching the pivot shaft 4. 5. The width of the rotating plate 3 is smaller than the width of the opening of the water tank 2, the axis of the pivot shaft 4 is parallel to the width direction of the rotating plate 3, the left short side of the rotating plate 3 is located inside the opening of the water tank 2, and the right side of the rotating plate 3 The short side is locat...

Embodiment 2

[0046] see Figure 5 , a composite airtightness detection device for steel-plastic pipe fittings. The difference between this embodiment and Embodiment 1 is that a V-shaped groove is provided on the upper end surface of the pallet 11, which is convenient for the automatic centering of the steel-plastic pipe fittings placed on the pallet 11. ; On the cylinder mounting plate 901, a linear bearing is also installed, and the piston rod of the cylinder two 902 is slidably connected in the linear bearing, which can ensure that the cylinder seat 904 driven by the piston rod of the cylinder two 902 runs more smoothly and can be inserted more accurately The steel-plastic pipe fittings are sealed inside.

Embodiment 3

[0048] A composite type steel-plastic pipe fitting airtightness detection device, the difference between this embodiment and embodiment 1 or embodiment 2 is that, see Image 6 , the expansion sealing ring 1 806 is hollow, and the middle part of the outer wall and the middle part of the inner wall of the expansion sealing ring 806 protrude radially outward to form an arc surface. When the expansion sealing ring 1 806 is squeezed by the pressure block 804, it is easy to expand The middle part of sealing ring one 806 expands radially outward to realize sealing, and the middle part of the inner wall of expansion sealing ring one 806 also protrudes to form a circle of reinforcement ring 8061, which is used to improve the structural strength of expansion sealing ring one 806 and prolong its service life. see Figure 7 , the structure of the second expansion sealing ring 908 is the same as that of the first expansion sealing ring 806 .

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Abstract

The invention discloses an air-tightness detection device for a composite steel-plastic pipe fitting. The device comprises a rack and a water tank arranged on the rack. A rotating plate is pivotally connected on one side of the open end of the water tank. The two ends, which are perpendicular to the rotating axis of the pivotal end, of the upper end of the rotating plate are respectively providedwith a first seal component and a second seal component. The first seal component is arranged on the inner side of the opening of the water tank. The second seal component is arranged on the outer side of the opening of the water tank. The openings of the two ends of the steel-plastic pipe fitting are sealed through the first seal component and the second seal component. The inner diameter of theopening of the steel-plastic pipe fitting is sealed instead of sealing the two ends of the opening of the steel-plastic pipe fitting through compressing so that the steel-plastic pipe fitting is not liable to be damaged, and the detection structure is more accurate.

Description

technical field [0001] The invention relates to the technical field of pipe fitting detection, in particular to a composite steel-plastic pipe fitting airtightness detection device. Background technique [0002] Steel-plastic pipe fittings, also known as steel-plastic conversion joints, are used as conversion connectors between steel pipes and plastic pipes (usually PE pipes, namely polyethylene pipes), and have been widely used in two important industries: gas pipeline network and water conservancy transportation. It itself consists of a steel pipe section and a plastic pipe section, which are formed by snapping each end of the steel pipe section and the plastic pipe section relative to each other, and a sealing ring is set inside the snap joint, and a metal hoop is set outside to increase the sealing effect. The overall appearance is three sections connected end to end The cylinder, and the outer diameter of the middle section (the outer diameter of the butt joint section)...

Claims

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Application Information

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IPC IPC(8): G01M3/08
Inventor 童津金
Owner NINGBO HENGYUAN PRECISION VALVES TECH
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