CN203132924U - Local pressure testing structure for pressure vessel - Google Patents

Abstract

The utility model discloses a local pressure test structure of a pressure vessel, which comprises a blind plate installed on the nozzle of a newly added flange and a pressure test box installed on the wall of the pressure vessel, the pressure test box, the new The flange connection and the blind plate jointly form a closed pressure test space. The utility model checks the strength and tightness of the equipment modification by performing a local hydraulic test at the equipment modification, reduces water consumption, reduces the overall construction time, and solves the urgent need for maintenance and construction under the premise of laws and regulations The problem has changed the previous model that the container needs to be filled with water for pressure test after partial modification, which greatly reduces the cost of pressure test. And the utility model is simple in structure, easy to use.

Description

Partial pressure test structure of a pressure vessel

technical field

The utility model relates to a pressure test structure of a pressure vessel, in particular to a partial pressure test structure of the pressure vessel.

Background technique

When some process flow of petrochemical production equipment is optimized or changed, some pressure vessels (such as towers or storage tanks, etc.) need to be partially modified, such as adding new joints or other accessories to the equipment, or Change the original port diameter of the equipment. For partial modification of pressure vessels, it is necessary to follow the pressure vessel manufacturing specifications, such as GB150 and GB151, and notify the local relevant departments of the pressure vessel modification. According to the relevant specifications of pressure vessel manufacturing, strength and tightness tests should be carried out after the equipment renovation construction/manufacturing is completed. In the past, the conventional practice was to conduct overall hydraulic pressure tests on the equipment. The equipment to be transformed is the equipment that has already been put into use in the plant, and the construction content is generally completed during the shutdown of the plant for maintenance. Since the equipment has been put into use, and the insulation, piping, and internal parts of the equipment have been completed, the biggest difficulty in the overall pressure test of the equipment is the removal of the nozzle flange of the equipment and the installation of the blind plate, followed by the overall water supply and drainage of the equipment. In addition to the two points having a great impact on the construction period, the consumption of manpower, equipment and materials is also huge. Therefore, it is urgent to develop a local pressure test structure for pressure vessels.

Utility model content

The utility model provides a local pressure test structure of a pressure vessel to solve the technical problems in the known technology.

The technical solution adopted by the utility model to solve the technical problems in the known technology is: a local pressure test structure of a pressure vessel, including a blind plate installed on the nozzle of the newly added flange and a blind plate installed on the wall of the pressure vessel. The pressure test box, the pressure test box, the newly added flange adapter and the blind plate together form a closed pressure test space.

The pressure test box is welded on the inner wall of the pressure vessel.

The pressure test box is welded on the outer wall of the pressure vessel.

A reinforcing ring is welded on the outer wall of the pressure vessel, and the reinforcing ring is set and welded on the outside of the newly added flange connection.

The advantages and positive effects of the utility model are: since the influence on the overall strength of the equipment can be basically ignored after the local renovation, the utility model checks the strength and tightness of the equipment renovation by performing a local hydraulic test at the equipment renovation , reduced water consumption, reduced the overall construction time, and solved the problem of tight time in maintenance and construction under the premise of laws and regulations. Greatly reduced. And the utility model is simple in structure, easy to use.

Description of drawings

Fig. 1 is the structural representation of the utility model first scheme;

Fig. 2 is a schematic structural view of the second solution of the present invention.

In the figure: 1. Pressure gauge; 2. Vent valve; 3. Blind plate; 4. Added flange connection; 5. Pressure test box; 6. Pressure vessel wall; 7. Reinforcing ring.

Detailed ways

In order to further understand the invention content, characteristics and effects of the present utility model, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

Please refer to Fig. 1 and Fig. 2, a partial pressure test structure of a pressure vessel, including a blind plate 3 installed on the nozzle of the newly added flange connection 4 and a pressure test box 5 installed on the wall 6 of the pressure vessel. The pressure test box 5 , the newly added flange adapter 4 and the blind plate 3 jointly form a closed pressure test space. By installing pressure test materials on the parts that form a closed pressure test space, such as pressure test valve 8, pressure gauge 1 and vent valve 2, etc., the closed space is used for pressure test operations to realize partial pressure test of the pressure vessel.

Referring to Fig. 1, the pressure test box 5 is welded on the inner wall of the pressure vessel. Referring to Fig. 2, the pressure test box 5 is welded on the outer wall of the pressure vessel. Regardless of whether the pressure test box 5 is installed on the outer wall or the inner wall of the pressure vessel, a reinforcing ring 7 must be welded on the outer wall of the pressure vessel, and the reinforcing ring 7 is set and welded on the newly added flange connection. 4 outside.

The above-mentioned pressure test box should include all the heat-affected zones of the modified welds, and the strength and tightness of the modified parts can be checked by carrying out a hydraulic test on this pressure test box. When installing the pressure test box, for general single-wall containers, the pressure test box can be welded on the outer wall or inner wall of the container, and the pressure test box is welded on the inner wall, and the deformation or tightness of the equipment modification should be checked externally. If the pressure test box is welded on the outer wall, it should be checked inside the container. For composite layer containers, generally speaking, the pressure test box should be welded on the carbon steel layer.

Although the preferred embodiment of the utility model has been described above in conjunction with the accompanying drawings, the utility model is not limited to the above-mentioned specific implementation, and the above-mentioned specific implementation is only illustrative and not restrictive. Under the enlightenment of the utility model, those skilled in the art can also make many forms without departing from the purpose of the utility model and the protection scope of the claims, and these all belong to the protection scope of the utility model.

Claims (4)

1. A local pressure test structure of a pressure vessel, characterized in that it comprises a blind plate installed on the nozzle of the newly added flange and a pressure test box installed on the wall of the pressure vessel, the pressure test box, the The newly added flange connection and the blind plate together form a closed pressure test space. 2 . The partial pressure test structure of the pressure vessel according to claim 1 , wherein the pressure test box is welded on the inner wall of the pressure vessel. 3 . 3 . The partial pressure test structure of the pressure vessel according to claim 1 , wherein the pressure test box is welded on the outer wall of the pressure vessel. 4 . 4. The partial pressure test structure of the pressure vessel according to claim 2 or 3, characterized in that a reinforcing ring is welded on the outer wall of the pressure vessel, and the reinforcing ring is set and welded on the newly added The outside of the flange takes over.

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