CN203560665U - Sealing device for hydraulic tests - Google Patents

Abstract

The utility model relates to a sealing device for a hydraulic test. The purpose is that the sealing device provided should have the characteristics of reusability, convenient installation and removal, and simple structure. The technical solution is: a sealing device for hydrostatic testing, which is characterized in that it includes a cover plate for sealing the equipment connection pipe, a sealing ring positioned between the cover plate and the equipment connection pipe, a fixing ring fixed on the equipment connection pipe and Several axial bolts are used to connect the cover plate and the fixing ring so as to generate axial pre-tightening force on the cover plate.

Description

A sealing device for hydrostatic test

technical field

The utility model relates to a pressure test device, in particular to a pressure test sealing device.

Background technique

The hydrostatic test is a pressure test with water as the medium and the pressure equipment is higher than the working pressure. The purpose is to test the tightness and compressive strength of the pressure equipment. According to Pascal's law, it can be seen that the pressure applied to the enclosed liquid is transmitted from the liquid to all directions without changing. During the hydrostatic test, if there are small pores in a certain part of the pressure-bearing equipment, the part will leak, and when the mechanical strength of the part is weak, it will also cause deformation or damage. For potential safety hazards after hydrostatic testing, corresponding measures can be taken in advance to improve the reliability and service life of pressure-bearing equipment.

At present, before the hydrostatic test, the connecting pipe of the pressure-bearing equipment should be designed to a certain length (longer than the actual demand), and the cover plate should be welded on the end surface of the connecting pipe to seal the pressure-bearing equipment, and the redundant connecting pipe should be cut off after the test And the cover plate, and grind the cut surface of the connecting pipe to make it smooth. This not only increases the working intensity, but also has serious material loss, which greatly reduces the production efficiency, so it needs further improvement.

Utility model content

The purpose of this utility model is to overcome the shortcomings in the above-mentioned background technology and provide a sealing device for hydrostatic testing. The sealing device should have the characteristics of reusability, convenient installation and removal, and simple structure.

The technical scheme of the utility model is: a sealing device for hydrostatic testing, which is characterized in that it includes a cover plate for sealing the equipment connection pipe, a sealing ring positioned between the cover plate and the equipment connection pipe, and a sealing ring fixed on the equipment connection pipe. The fixed ring and several axial bolts are used to connect the cover plate and the fixed ring to generate axial pre-tightening force on the cover plate.

The fixing ring is a pair of hoops that are mutually butted and positioned on the outer peripheral surface of the equipment connection.

The cover plate and the hoop are formed with a plurality of through holes for axial bolts to pass through.

An installation groove for positioning the sealing ring is formed on the inner end surface of the cover plate.

The beneficial effects of the utility model are:

The utility model generates an axial force between the fixed ring and the cover plate by pre-tightening the axial bolts, so that the cover plate can firmly seal the connecting pipe of the pressure-bearing equipment, and can be easily removed after the hydraulic test is completed; Therefore, the utility model not only can be reused, but also is easy to operate, simple in structure, no need to weld (can be designed according to the actual length of the connecting pipe), avoids unnecessary material waste, and has a good sealing effect, which greatly improves the water pressure The efficiency of the test.

Description of drawings

Fig. 1 is a three-dimensional structural schematic view of the utility model when in use.

Fig. 2 is a front structural schematic view of the utility model.

Fig. 3 is a right view structure diagram of the utility model.

Fig. 4 is a left view structural diagram of the utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings of the description, but the utility model is not limited to the following embodiments.

As shown in the figure, a sealing device for a hydrostatic test includes a cover plate 1, a sealing ring 4, an axial bolt 3 and a fixing ring.

The cover plate is used to cover the opening of the equipment connection pipe 9 (the direction on the right side of the connection pipe in the figure), and is generally made of a circular metal plate; the sealing ring is positioned between the inner end surface of the cover plate and the opening of the equipment connection pipe; the inner side of the cover plate An installation groove (omitted in the figure) for positioning the sealing ring is also formed on the end face 1-1, and the sealing ring can be put into the installation groove to prevent the sealing ring from sliding.

The fixing ring is fixed on the equipment connecting pipe, and the axial movement of the fixing ring is prevented by applying a certain pressure on the outer peripheral surface of the equipment connecting pipe; The hoops are connected to each other by fixing bolts 2-1 and positioned on the outer circumferential surface of the equipment connection.

A number of axial bolts 3 vertically pass through the cover plate and the hoop; the number of axial bolts is generally 4-8 (4 in the figure); the cover plate and the hoop are made with several holes for the axial bolts to pass through. Through holes; by pre-tightening the axial bolts, the axial bolts can generate an axial force between the cover plate and the hoop. Since the hoop is firmly fixed on the equipment connection and cannot be moved, the force will be tightened The cover plate thus closes the opening of the equipment connecting pipe, ensuring a good sealing effect.

The installation and disassembly method of the utility model is as follows: before the hydraulic test, first fix the hoop on the equipment connection pipe, then place the cover plate at the opening position of the equipment connection pipe, and connect the cover plate and the hoop with axial bolts Together, finally tighten the axial bolts (according to the diagonal method) to tighten the cover plate; after the hydraulic test is completed, the utility model can be disassembled by successively unloading the axial bolts and fixing bolts.

Claims (4)

1. A sealing device for hydrostatic testing, characterized in that: it includes a cover plate (1) for sealing the equipment connection pipe (9), a sealing ring (4) positioned between the cover plate and the equipment connection pipe, fixed on The fixed ring on the equipment connection and several axial bolts (3) used to connect the cover plate and the fixed ring to generate axial pre-tightening force on the cover plate. 2 . The sealing device for hydrostatic testing according to claim 1 , wherein the fixing ring is a pair of hoops ( 2 ) that are butted with each other and positioned on the outer circumferential surface of the equipment connection. 3 . 3. A sealing device for hydrostatic testing according to claim 2, characterized in that: said cover plate and hoop are formed with a plurality of through holes for axial bolts to pass through. 4 . The sealing device for hydrostatic testing according to claim 3 , wherein an installation groove for positioning the sealing ring is formed on the inner end surface of the cover plate. 5 .

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