CN219830292U

CN219830292U - Pressure testing device suitable for valves of different types and pressure grades

Info

Publication number: CN219830292U
Application number: CN202320983492.5U
Authority: CN
Inventors: 郁越; 王元祥; 张立勇
Original assignee: China Nuclear Industry Huaxing Construction Co Ltd
Current assignee: China Nuclear Industry Huaxing Construction Co Ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-10-13
Anticipated expiration: 2033-04-27

Abstract

The utility model provides a pressure testing device suitable for valves of different types and pressure grades, which comprises a pressure testing main pipe, a water inlet pipe, a pressure testing pump and a water outlet device; the pressure test main pipe is divided into a plurality of test sections with different pressure grades, and a pressure reducing device is arranged between two adjacent test sections; each group of test sections is respectively provided with a connecting pipeline for connecting a valve to be tested, and the connecting pipeline comprises one or more common flange connecting short pipes, butterfly valve flange connecting short pipes and threading steel pipes which are respectively used for installing the common flange valve, the butterfly valve flange valve and the threading valve; and pressure gauges are respectively arranged on the test sections of each group. The pressure test main pipe is provided with a plurality of test sites with different pressure levels and different types, can be used for testing valves with different types and different specifications, can detect the strength and tightness of the valves with different pressure level requirements and different types and specifications at the same time, improves the test efficiency of the valves, and has the advantages of small occupied space, material saving, wide application range and strong practicability.

Description

Pressure testing device suitable for valves of different types and pressure grades

Technical field:

the utility model belongs to the technical field of building installation, and particularly relates to a pressure testing device suitable for valves of different types and pressure grades.

The background technology is as follows:

the valve is a pipeline accessory for opening and closing a pipeline, controlling flow direction, adjusting and controlling parameters (temperature, pressure and flow) of a conveying medium, has functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, shunting or overflow pressure relief and the like, is often used for controlling the flow of various types of fluids such as air, water, steam, various corrosive mediums, slurry, oil products, liquid metal, radioactive mediums and the like, and is widely used in engineering fields such as chemical industry, petroleum, nuclear power and the like. In the field of construction and installation engineering, the quality of the valve directly affects the engineering quality, so that the strength and tightness tests of the valve are tested before application to avoid problems in use. Valve strength and tightness testing devices exist in the prior art, however, the existing valve testing devices generally test only a single valve, or a single type, specification, or single pressure level valve, resulting in low valve testing efficiency. Based on the above, the present utility model provides a pressure test device suitable for valves of different types and pressure grades to solve the above problems.

The utility model comprises the following steps:

the utility model aims to overcome the defects of the prior art and provides a pressure testing device suitable for valves of different types and pressure grades.

The utility model adopts the following technical scheme:

the utility model provides a pressure testing device suitable for valves of different types and pressure grades, which comprises a pressure testing main pipe, a water inlet pipe, a pressure testing pump and a water outlet device; the pressure test main pipe is divided into a plurality of test sections with different pressure grades, and a pressure reducing device is arranged between two adjacent test sections; each group of test sections are respectively provided with a connecting pipeline for connecting a valve to be tested, one end of each connecting pipeline is communicated with the pressure test main pipe, and the other end of each connecting pipeline is communicated with the valve to be tested; and pressure gauges are respectively arranged on the test sections of each group.

Further, in the pressure testing main pipe, the water inlet pipe and the pressure testing pump are arranged at one end of the pressure testing main pipe, and the pressure level of each testing section is gradually reduced along the direction far away from the water inlet pipe.

Further, the connecting pipeline comprises one or more common flange connecting short pipes, butterfly valve flange connecting short pipes and threading steel pipes, and the common flange valve, the butterfly valve flange valve and the threading valve are respectively arranged.

Further, the tail end of the common flange short connecting pipe is detachably and fixedly connected with a common flange with a welded big end; the welding big-end and small-end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe; the aperture of one end of the reducing short pipe is the same as that of the common flange short pipe, and the reducing short pipe and the common flange short pipe are fixedly connected through a flange; the aperture of the other end of the reducing short pipe is matched with a common flange valve and is fixedly connected with the common flange valve through a flange.

Further, the tail end of the butterfly valve flange connecting short pipe is detachably and fixedly connected with the groove variable-diameter butterfly valve flange; the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe; the aperture of one end of the reducing short pipe is matched with the aperture of the butterfly valve flange short connecting pipe, and the reducing short pipe is fixedly connected with the butterfly valve flange short connecting pipe through a flange; the aperture of the other end of the reducing short pipe is matched with a butterfly valve flange valve and is fixedly connected with the butterfly valve flange valve through a flange.

Furthermore, a plurality of fixing brackets are arranged below the pressure test main pipe and are fixedly arranged through the fixing brackets; and the two ends of the pressure testing main pipe are sealed through hemispherical sealing heads.

Furthermore, the water outlet device is a stop valve, the number of the stop valves is consistent with that of the test sections, and the stop valves are respectively arranged on the pressure test main pipes corresponding to the test sections.

Further, the pressure test main pipe is divided into a first test section, a second test section and a third test section, and the pressure grades are respectively 2.5MPa,1.6MPa and 1.0MPa; a 2.5/1.6MPa pressure reducing valve is arranged between the first test section and the second test section, and a 1.6/1.0MPa pressure reducing valve is arranged between the second test section and the third test section; the water outlet device comprises a 2.5MPa stop valve, a 1.6MPa stop valve and a 1.0MPa stop valve which are respectively arranged on the first test section, the second test section and the third test section.

Further, the connecting pipeline arranged on the first test section comprises a DN200 common flange short pipe with the pressure of 2.5MPa, a DN200 butterfly valve flange short pipe with the pressure of 2.5MPa, a DN50 galvanized mantle fiber steel pipe, a DN40 galvanized mantle fiber steel pipe, a DN32 galvanized mantle fiber steel pipe, a DN25 galvanized mantle fiber steel pipe, a DN20 galvanized mantle fiber steel pipe and a DN15 galvanized mantle fiber steel pipe; the connecting pipeline arranged on the second test section comprises a DN200 common flange short pipe with the pressure of 1.6MPa, a DN200 butterfly valve flange short pipe with the pressure of 1.6MPa, a DN50 galvanized wire-covering steel pipe, a DN40 galvanized wire-covering steel pipe, a DN32 galvanized wire-covering steel pipe, a DN25 galvanized wire-covering steel pipe, a DN20 galvanized wire-covering steel pipe and a DN15 galvanized wire-covering steel pipe; the connecting pipeline arranged on the third test section comprises a DN200 common flange short pipe with the pressure of 1.0MPa, a DN200 butterfly valve flange short pipe with the pressure of 1.0MPa, a DN50 galvanized wire-covering steel pipe, a DN40 galvanized wire-covering steel pipe, a DN32 galvanized wire-covering steel pipe, a DN25 galvanized wire-covering steel pipe, a DN20 galvanized wire-covering steel pipe and a DN15 galvanized wire-covering steel pipe.

Further, the DN200 common flange short pipe with the pressure of 2.5MPa is detachably and fixedly connected with a common flange with a welded big end and a common flange valve in sequence; the welding big-end and small-end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe; the welding size head common flange is 2.5MPa of welding size head common flanges with phi 219 x 159, phi 219 x 133, phi 219 x 108, phi 219 x 89 or phi 219 x 76; the DN200 butterfly valve flange short pipe of 2.5MPa is detachably and fixedly connected with the groove variable diameter butterfly valve flange and the butterfly valve flange valve in sequence; the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe; the groove reducing butterfly valve flange is a groove reducing butterfly valve flange with DN200 x 150, DN200 x 125, DN200 x 100, DN200 x 80 or DN200 x 65 of 2.5 MPa; the DN200 common flange short pipe with the pressure of 1.6MPa is connected with a common flange with a welded big end and a common flange valve in a detachable and fixed way in sequence; the welding big-end and small-end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe; the welding size head common flange is a welding size head common flange with the welding size head of 1.6MPa of phi 219 x 159, phi 219 x 133, phi 219 x 108, phi 219 x 89 or phi 219 x 76; the DN200 butterfly valve flange short pipe of 1.6MPa is detachably and fixedly connected with the groove variable diameter butterfly valve flange and the butterfly valve flange valve in sequence; the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe; the groove reducing butterfly valve flange is a groove reducing butterfly valve flange with DN200 x 150, DN200 x 125, DN200 x 100, DN200 x 80 or DN200 x 65 of 1.6 MPa; the DN200 common flange short pipe with the pressure of 1.0MPa is detachably and fixedly connected with a common flange with a welded big end and a common flange valve in sequence; the welding big-end and small-end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe; the welding size head common flange is a welding size head common flange with the welding size head of 1.0MPa of phi 219 x 159, phi 219 x 133, phi 219 x 108, phi 219 x 89 or phi 219 x 76; the DN200 butterfly valve flange short pipe of 1.0MPa is detachably and fixedly connected with the groove variable diameter butterfly valve flange and the butterfly valve flange valve in sequence; the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe; the groove reducing butterfly valve flange is a groove reducing butterfly valve flange with DN200 x 150, DN200 x 125, DN200 x 100, DN200 x 80 or DN200 x 65 of 1.0 MPa.

Because the reducing pipe material of the groove reducing butterfly valve flange is galvanized steel pipe, the nominal diameter DN+ specification is used for representing; the reducer pipe material for welding the common flange with the big end and the small end is a seamless steel pipe, so the reducer pipe material is directly expressed by the specification of the outer diameter phi of a pipeline.

The utility model has the beneficial effects that:

(1) The pressure test main pipe is provided with a plurality of test sections with different pressure levels, can be used for testing the strength and tightness of valves with different pressure levels, and is provided with different types of connecting pipelines respectively, so that the pressure test main pipe can adapt to the testing of valves with different types and different specifications, and has wide application range;

(2) The pressure test main pipe is provided with a plurality of test positions with different pressure levels and different types, so that the valves with different pressure levels and different types can be tested simultaneously, the test efficiency of the valves is improved, the occupied space is small, the materials are saved, and the practicability is high.

Description of the drawings:

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a flange of a common flange with welded big and small heads and a groove reducing butterfly valve, which is provided with accessories of 1-2.5 MPa in the embodiment of the utility model;

FIG. 3 is a schematic diagram of a flange of a groove reducing butterfly valve, which is welded with a common flange with a big end and a small end in each specification and is attached with 2-1.6 MPa in the embodiment of the utility model;

FIG. 4 is a schematic diagram of a flange of a groove reducing butterfly valve, welded with a common flange with a big end and a small end in each specification, wherein the flange is attached to 3-1.0 MPa in the embodiment of the utility model.

The marks in fig. 1 are:

1. a pressure test main pipe; 2. a 2.5/1.6MPa pressure reducing valve; 3. a 1.6/1.0MPa pressure reducing valve; 4. hemispherical closure head; 5. a fixed bracket; 6. DN200 common flange short pipe with 2.5 MPa; 7. DN200 butterfly valve flange short pipe with 2.5 MPa; 8. DN50 galvanized threading steel pipe; 9. DN40 galvanized threading steel pipe; 10. a pressure gauge; 11. DN32 galvanized threading steel pipe; 12. DN25 galvanized threading steel pipe; 13. DN20 galvanized threading steel pipe; 14. DN15 galvanized threading steel pipe; 15. a water inlet pipe; 16. 2.5MPa stop valve; 17. a 1.6MPa stop valve; 18. DN200 common flange short pipe with 1.6 MPa; 19. DN200 butterfly valve flange short pipe with 1.6 MPa; 20. DN200 common flange short pipe with 1.0MPa; 21. DN200 butterfly valve flange short pipe with 1.0MPa; 22. a 1.0MPa stop valve; 23. a pressure test pump;

the labels in fig. 2 are:

2-1, DN200 x 150 groove reducing butterfly valve flange (2.5 MPa); 2-2, DN200 x 125 groove reducing butterfly valve flange (2.5 MPa); 2-3, DN200 x 100 groove reducing butterfly valve flange (2.5 MPa); 2-4, DN200 x 80 groove diameter-variable butterfly valve flange (2.5 MPa); 2-5, DN200 x 65 groove diameter-variable butterfly valve flange (2.5 MPa); 2-6, phi 219 x 159 welding a common flange with a big end and a small end (2.5 MPa); 2-7, phi 219 x 133, welding a common flange with a big end and a small end (2.5 MPa); 2-8, phi 219 x 108, welding a common flange with a big end and a small end (2.5 MPa); 2-9, phi 219 x 89 welding a common flange with a big end and a small end (2.5 MPa); 2-10, phi 219 x 76 welding a common flange with a big end and a small end (2.5 MPa);

the labels in fig. 3 are:

3-1, DN200 x 150 groove reducing butterfly valve flange (1.6 MPa); 3-2, DN200 x 125 groove diameter-variable butterfly valve flange (1.6 MPa); 3-3, DN200 x 100 groove reducing butterfly valve flange (1.6 MPa); 3-4, DN200 x 80 groove diameter-variable butterfly valve flange (1.6 MPa); 3-5, DN200 x 65 groove diameter-variable butterfly valve flange (1.6 MPa); 3-6, phi 219 x 159 welding a common flange with a big end and a small end (1.6 MPa); 3-7, phi 219 x 133 welding a common flange with a big end and a small end (1.6 MPa); 3-8, phi 219 x 108 welding a common flange with a big end and a small end (1.6 MPa); 3-9, phi 219 x 89 welding a common flange with a big end and a small end (1.6 MPa); 3-10, phi 219 x 76 welding a common flange with a big end and a small end (1.6 MPa);

the labels in fig. 4 are:

4-1, DN200 x 150 groove reducing butterfly valve flange (1.0 MPa); 4-2, DN200 x 125 groove diameter-variable butterfly valve flange (1.0 MPa); 4-3, DN200 x 100 groove reducing butterfly valve flange (1.0 MPa); 4-4, DN200 x 80 groove diameter-variable butterfly valve flange (1.0 MPa); 4-5, DN200 x 65 groove diameter-variable butterfly valve flange (1.0 MPa); 4-6, phi 219 x 159 welding a common flange with a big end and a small end (1.0 MPa); 4-7, phi 219 x 133, welding a common flange with a big end and a small end (1.0 MPa); 4-8, phi 219 x 108, welding a common flange with a big end and a small end (1.0 MPa); 4-9, phi 219 x 89 welding a common flange with a big end and a small end (1.0 MPa); 4-10, phi 219 x 76 welding the common flange with the big end and the small end (1.0 MPa).

The specific embodiment is as follows:

in order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1, an embodiment of the present utility model provides a pressure test device suitable for valves of different types and pressure levels, including a pressure test main pipe 1, a water inlet pipe 15, a pressure test pump 23, and a water outlet device, where the water inlet pipe 15 and the pressure test pump 23 are disposed at one end of the pressure test main pipe 1; the pressure test main pipe 1 is divided into a plurality of test sections with different pressure levels, and the pressure levels of the test sections gradually decrease along the direction away from the water inlet pipe 15; a pressure reducing device is arranged between two adjacent test sections, so that the pressure of the test sections meets the requirements of the strength and tightness test of the valve; each group of test sections are respectively provided with a connecting pipeline for connecting a valve to be tested, one end of each connecting pipeline is communicated with the pressure test main pipe 1, and the other end of each connecting pipeline is communicated with the valve to be tested; pressure gauges 10 are respectively arranged on each group of test sections. A plurality of fixing brackets 5 are arranged below the pressure test main pipe 1, and are fixedly arranged through the fixing brackets 5; the two ends of the pressure testing main pipe 1 are sealed through hemispherical sealing heads 4.

In this embodiment, the connecting pipeline includes one or more common flange connecting short pipes, butterfly valve flange connecting short pipes and threading steel pipes, which are respectively used for installing common flange valves, butterfly valve flange valves and threading valves; the water outlet device is a stop valve, the number of the stop valves is consistent with that of the test sections, and the stop valves are respectively arranged on the pressure test main pipe 1 corresponding to each test section.

When the device is applied, firstly, a valve to be tested, which needs to be subjected to strength test and tightness test, is selected, the valve to be tested is hermetically arranged on a corresponding connecting pipeline, and the connecting pipeline which does not occupy space (a vacancy without pressure test) is plugged by adopting a flange blind plate or a wire plug; closing the stop valve, injecting water through the pressure test pump 23, and testing the strength and tightness of the valve according to the time required by the specification; after the pressure test is completed, the stop valve is opened, the water in the pressure test main pipe 1 is completely discharged, and the opened connecting pipeline is completely closed.

Example 2

The main structure of this embodiment is the same as that of embodiment 1, except that: the present embodiment is further limited to the specific structure of the valve installation.

Referring to fig. 1 to 3, in this embodiment, the end of the common flange junction pipe is detachably and fixedly connected with a common flange with a welded big-end and a small-end; the welding big-end and small-end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe; the aperture of one end of the reducing short pipe is the same as that of the common flange short pipe, and the reducing short pipe and the common flange short pipe are fixedly connected through a flange; the aperture of the other end of the reducing short pipe is matched with a common flange valve and is fixedly connected with the common flange valve through a flange.

In the embodiment, the tail end of the butterfly valve flange connecting short pipe is detachably and fixedly connected with the groove reducing butterfly valve flange; the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe; the aperture of one end of the reducing short pipe is matched with the aperture of the butterfly valve flange short connecting pipe, and the reducing short pipe is fixedly connected with the butterfly valve flange short connecting pipe through a flange; the aperture of the other end of the reducing short pipe is matched with a butterfly valve flange valve and is fixedly connected with the butterfly valve flange valve through a flange.

The embodiment specifically describes the valve mounting structure, wherein the tail end of the common flange short connecting pipe is detachably and fixedly connected with a common flange with a welded big end and a common flange with a welded big end, and the common flange with the welded big end is detachably and fixedly connected with a valve to be tested; the tail end of the butterfly valve flange connecting short pipe is detachably and fixedly connected with a groove reducing butterfly valve flange, and the groove reducing butterfly valve flange is detachably and fixedly connected with a butterfly valve flange valve to be measured. The design has the advantages that on one hand, the valve to be tested is convenient to mount and dismount, on the other hand, the device has wider application range, and the strength and tightness of the valves with different specifications can be detected as required.

Example 3

Referring to fig. 1 to 3, the present embodiment provides a pressure test device suitable for valves of different types and pressure levels, including a pressure test main pipe 1 (DN 400 seamless pipe steel pipe), a water inlet pipe 15 (DN 32 galvanized steel pipe), a pressure test pump 23, and a water outlet device, the water inlet pipe 15 and the pressure test pump 23 being disposed at one end of the pressure test main pipe 1; the pressure testing main pipe 1 is divided into a first test section, a second test section and a third test section, and the pressure grades are respectively 2.5MPa,1.6MPa and 1.0MPa; a 2.5/1.6MPa pressure reducing valve 2 (DN 400) is arranged between the first test section and the second test section, and a 1.6/1.0MPa pressure reducing valve 3 (DN 400) is arranged between the second test section and the third test section; the water outlet device comprises a 2.5MPa stop valve 16 (DN 32), a 1.6MPa stop valve 17 (DN 32) and a 1.0MPa stop valve 22 (DN 32), which are respectively arranged on the first test section, the second test section and the third test section. The pressure gauges 10 are respectively arranged on the test sections of each group and are used for measuring the pressure of each test section; a plurality of fixing brackets 5 (10 # channel steel) are arranged below the pressure test main pipe 1, and stable installation and fixation are carried out through the fixing brackets 5; the two ends of the pressure testing main pipe 1 are sealed through hemispherical sealing heads 4.

In this embodiment, the first test section, the second test section and the third test section are respectively provided with a connecting pipeline for connecting the valve to be tested, one end of the connecting pipeline is communicated with the pressure testing main pipe 1, and the other end of the connecting pipeline is communicated with the valve to be tested. Specifically, the connecting pipeline arranged on the first test section comprises a DN200 common flange short pipe 6 with the pressure of 2.5MPa, a DN200 butterfly valve flange short pipe 7 with the pressure of 2.5MPa, a DN50 galvanized mantle fiber steel pipe 8, a DN40 galvanized mantle fiber steel pipe 9, a DN32 galvanized mantle fiber steel pipe 11, a DN25 galvanized mantle fiber steel pipe 12, a DN20 galvanized mantle fiber steel pipe 13 and a DN15 galvanized mantle fiber steel pipe 14; the connecting pipeline arranged on the second test section comprises a DN200 common flange short pipe 18 with the pressure of 1.6MPa, a DN200 butterfly valve flange short pipe 19 with the pressure of 1.6MPa, a DN50 galvanized mantle fiber steel pipe 8, a DN40 galvanized mantle fiber steel pipe 9, a DN32 galvanized mantle fiber steel pipe 11, a DN25 galvanized mantle fiber steel pipe 12, a DN20 galvanized mantle fiber steel pipe 13 and a DN15 galvanized mantle fiber steel pipe 14; the connecting pipeline arranged on the third test section comprises a DN200 common flange short pipe 20 with the pressure of 1.0MPa, a DN200 butterfly valve flange short pipe 21 with the pressure of 1.0MPa, a DN50 galvanized mantle fiber steel pipe 8, a DN40 galvanized mantle fiber steel pipe 9, a DN32 galvanized mantle fiber steel pipe 11, a DN25 galvanized mantle fiber steel pipe 12, a DN20 galvanized mantle fiber steel pipe 13 and a DN15 galvanized mantle fiber steel pipe 14.

In the embodiment, the galvanized mantle fiber steel pipes with various specifications can be provided with the to-be-tested wire connection valves in a sealing manner, and the strength and tightness of the wire connection valves with different specifications are tested.

In the embodiment, the DN200 common flange short pipe 6 with the pressure of 2.5MPa is detachably and fixedly connected with a welding big-small end common flange and a common flange valve in sequence, the welding big-small end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe; the welding size head common flange comprises (one or more than one of) welding size head common flanges of phi 219 x 159, phi 219 x 133, phi 219 x 108, phi 219 x 89 and phi 219 x 76 of 2.5 MPa; the DN200 butterfly valve flange short pipe 7 of 2.5MPa is detachably and fixedly connected with the groove variable diameter butterfly valve flange and the butterfly valve flange valve in sequence; the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe; the groove reducing butterfly valve flange comprises (one or more than one of) a groove reducing butterfly valve flange of DN200 x 150, DN200 x 125, DN200 x 100, DN200 x 80 or DN200 x 65 with the pressure of 2.5 MPa;

in this embodiment, the DN200 common flange short pipe 18 of 1.6MPa is detachably and fixedly connected with a common flange with a welded big-small end and a common flange valve in sequence; the welding big-end and small-end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe; the welding size head common flange comprises (one or more than one of) welding size head common flanges of phi 219 x 159, phi 219 x 133, phi 219 x 108, phi 219 x 89 or phi 219 x 76 of 1.6 MPa; the DN200 butterfly valve flange short pipe 19 of 1.6MPa is detachably and fixedly connected with the groove variable diameter butterfly valve flange and the butterfly valve flange valve in sequence; the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe; the groove reducing butterfly valve flange comprises (one or more than one of) 1.6MPa of DN200 x 150, DN200 x 125, DN200 x 100, DN200 x 80 or DN200 x 65 groove reducing butterfly valve flanges;

in this embodiment, the DN200 common flange short pipe 20 of 1.0MPa is detachably and fixedly connected with a common flange with a welded big-end and a common flange valve in sequence; the welding big-end and small-end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe; the welding size head common flange comprises (one or more than one of) welding size head common flanges of phi 219 x 159, phi 219 x 133, phi 219 x 108, phi 219 x 89 or phi 219 x 76 of 1.0MPa; the DN200 butterfly valve flange short pipe 21 of 1.0MPa is detachably and fixedly connected with the groove variable diameter butterfly valve flange and the butterfly valve flange valve in sequence; the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe; the groove reducing butterfly valve flange comprises (one or more than one of) 1.0MPa of DN 200:150, DN 200:125, DN 200:100, DN 200:80 or DN 200:65 groove reducing butterfly valve flanges.

The structure of the pressure testing device is described in detail in the embodiment, when the pressure testing device is applied, groove variable diameter butterfly valve flanges with different specifications in accessories 1-3 and common flanges with welded big and small ends can be selected according to the types of the valves, so that the common flange valves of DN65-DN200 (2.5 MPa,1.6MPa and 1.0 MPa), the butterfly valve flange valves of DN65-DN200 (2.5 MPa,1.6MPa and 1.0 MPa) and the wire connection valves of DN15-DN50 (2.5 MPa,1.6MPa and 1.0 MPa) can be subjected to strength and tightness tests, other vacancies without pressure testing are plugged by adopting flange blind plates, and a threading pipeline is plugged by adopting plugs, thereby greatly improving the strength and tightness test efficiency of the valves.

The utility model improves on the basis of the traditional valve strength and tightness test device, the test pressure of the valve is regulated by three-section DN400 seamless steel pipes and pressure reducing valves, and the pressure test efficiency of the valve is increased by opening holes of the seamless steel pipes in different test sections to contact short pipes (with flange sheets and threading) and attached variable-diameter short pipes (with flange sheets) of different types, and simultaneously, the vacancies without pressure test are plugged by adopting flange blind plates or plugs, thereby realizing the simultaneous strength and tightness tests of the valves of different pressure grades, different types and different sizes.

The foregoing is merely a preferred embodiment of the present utility model, and the scope of the present utility model is not limited to the above embodiments, but all technical solutions falling under the concept of the present utility model fall within the scope of the present utility model, and it should be noted that, for those skilled in the art, several modifications and adaptations without departing from the principles of the present utility model should and are intended to be regarded as the scope of the present utility model.

Claims

1. A pressure test device suitable for valves of different types and pressure grades is characterized in that,

comprises a pressure testing main pipe (1), a water inlet pipe (15), a pressure testing pump (23) and a water outlet device;

the pressure test main pipe (1) is divided into a plurality of test sections with different pressure grades, and a pressure reducing device is arranged between two adjacent test sections; each group of test sections are respectively provided with a connecting pipeline for connecting a valve to be tested, one end of each connecting pipeline is communicated with a pressure test main pipe (1), and the other end of each connecting pipeline is communicated with the valve to be tested; pressure gauges (10) are respectively arranged on the test sections of each group.

2. A pressure test device for valves of different types and pressure ratings as claimed in claim 1,

in the pressure testing main pipe (1), a water inlet pipe (15) and a pressure testing pump (23) are arranged at one end of the pressure testing main pipe (1), and the pressure level of each test section is gradually reduced along the direction far away from the water inlet pipe (15).

3. A pressure test device for valves of different types and pressure ratings as claimed in claim 1,

the connecting pipeline comprises one or more common flange connecting short pipes, butterfly valve flange connecting short pipes and threading steel pipes, and the connecting pipeline is respectively used for installing a common flange valve, a butterfly valve flange valve and a threading valve.

4. A pressure test device for valves of different types and pressure ratings as claimed in claim 3,

the tail end of the common flange connecting short pipe is detachably and fixedly connected with a common flange with a welded big end;

the welding big-end and small-end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe;

the aperture of one end of the reducing short pipe is the same as that of the common flange short pipe, and the reducing short pipe and the common flange short pipe are fixedly connected through a flange; the aperture of the other end of the reducing short pipe is matched with a common flange valve and is fixedly connected with the common flange valve through a flange.

5. A pressure test device for valves of different types and pressure ratings as claimed in claim 3,

the tail end of the butterfly valve flange connecting short pipe is detachably and fixedly connected with the groove variable-diameter butterfly valve flange;

the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe;

the aperture of one end of the reducing short pipe is matched with the aperture of the butterfly valve flange short connecting pipe, and the reducing short pipe is fixedly connected with the butterfly valve flange short connecting pipe through a flange; the aperture of the other end of the reducing short pipe is matched with a butterfly valve flange valve and is fixedly connected with the butterfly valve flange valve through a flange.

6. A pressure test device for valves of different types and pressure ratings as claimed in claim 1,

a plurality of fixing brackets (5) are arranged below the pressure test main pipe (1), and are fixedly arranged through the fixing brackets (5);

the two ends of the pressure testing main pipe (1) are sealed through hemispherical sealing heads (4).

7. A pressure test device for valves of different types and pressure ratings as claimed in claim 1,

the water outlet device is a stop valve, the number of the stop valves is consistent with that of the test sections, and the stop valves are respectively arranged on the pressure test main pipe (1) corresponding to each test section.

8. A pressure test device for valves of different types and pressure ratings as claimed in claim 1,

the pressure testing main pipe (1) is divided into a first test section, a second test section and a third test section, and the pressure grades are respectively 2.5MPa,1.6MPa and 1.0MPa; a 2.5/1.6MPa pressure reducing valve (2) is arranged between the first test section and the second test section, and a 1.6/1.0MPa pressure reducing valve (3) is arranged between the second test section and the third test section;

the water outlet device comprises a 2.5MPa stop valve (16), a 1.6MPa stop valve (17) and a 1.0MPa stop valve (22), and the water outlet device is respectively arranged on the first test section, the second test section and the third test section.

9. A pressure test device for valves of different types and pressure ratings as set forth in claim 8,

the connecting pipeline arranged on the first test section comprises a DN200 common flange short pipe (6) with the pressure of 2.5MPa, a DN200 butterfly valve flange short pipe (7) with the pressure of 2.5MPa, a DN50 galvanized mantle fiber steel pipe (8), a DN40 galvanized mantle fiber steel pipe (9), a DN32 galvanized mantle fiber steel pipe (11), a DN25 galvanized mantle fiber steel pipe (12), a DN20 galvanized mantle fiber steel pipe (13) and a DN15 galvanized mantle fiber steel pipe (14);

the connecting pipeline arranged on the second test section comprises a DN200 common flange short pipe (18) with the pressure of 1.6MPa, a DN200 butterfly valve flange short pipe (19) with the pressure of 1.6MPa, a DN50 galvanized mantle fiber steel pipe (8), a DN40 galvanized mantle fiber steel pipe (9), a DN32 galvanized mantle fiber steel pipe (11), a DN25 galvanized mantle fiber steel pipe (12), a DN20 galvanized mantle fiber steel pipe (13) and a DN15 galvanized mantle fiber steel pipe (14);

the connecting pipeline arranged on the third test section comprises a DN200 common flange short pipe (20) with the pressure of 1.0MPa, a DN200 butterfly valve flange short pipe (21) with the pressure of 1.0MPa, a DN50 galvanized mantle fiber steel pipe (8), a DN40 galvanized mantle fiber steel pipe (9), a DN32 galvanized mantle fiber steel pipe (11), a DN25 galvanized mantle fiber steel pipe (12), a DN20 galvanized mantle fiber steel pipe (13) and a DN15 galvanized mantle fiber steel pipe (14).

10. A pressure test device for valves of different types and pressure ratings as set forth in claim 9,

the DN200 common flange short pipe (6) with the pressure of 2.5MPa is detachably and fixedly connected with a common flange with a welded big end and a common flange valve in sequence; the welding big-end and small-end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe; the welding size head common flange is 2.5MPa of welding size head common flanges with phi 219 x 159, phi 219 x 133, phi 219 x 108, phi 219 x 89 or phi 219 x 76; the DN200 butterfly valve flange short pipe (7) of 2.5MPa is detachably and fixedly connected with the groove variable diameter butterfly valve flange and the butterfly valve flange valve in sequence; the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe; the groove reducing butterfly valve flange is a groove reducing butterfly valve flange with DN200 x 150, DN200 x 125, DN200 x 100, DN200 x 80 or DN200 x 65 of 2.5 MPa;

the DN200 common flange short pipe (18) with the pressure of 1.6MPa is detachably and fixedly connected with a common flange with a welded big end and a common flange valve in sequence; the welding big-end and small-end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe; the welding size head common flange is a welding size head common flange with the welding size head of 1.6MPa of phi 219 x 159, phi 219 x 133, phi 219 x 108, phi 219 x 89 or phi 219 x 76; the DN200 butterfly valve flange short pipe (19) of 1.6MPa is detachably and fixedly connected with the groove variable diameter butterfly valve flange and the butterfly valve flange valve in sequence; the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe; the groove reducing butterfly valve flange is a groove reducing butterfly valve flange with DN200 x 150, DN200 x 125, DN200 x 100, DN200 x 80 or DN200 x 65 of 1.6 MPa;

the DN200 common flange short pipe (20) with the pressure of 1.0MPa is detachably and fixedly connected with a common flange with a welded big end and a common flange valve in sequence; the welding big-end and small-end common flange comprises a reducing short pipe, and flanges are fixedly arranged at two ends of the reducing short pipe; the welding size head common flange is a welding size head common flange with the welding size head of 1.0MPa of phi 219 x 159, phi 219 x 133, phi 219 x 108, phi 219 x 89 or phi 219 x 76; the DN200 butterfly valve flange short pipe (21) with the pressure of 1.0MPa is detachably and fixedly connected with the groove variable diameter butterfly valve flange and the butterfly valve flange valve in sequence; the groove variable diameter butterfly valve flange comprises a variable diameter short pipe, and flanges are fixedly arranged at two ends of the variable diameter short pipe; the groove reducing butterfly valve flange is a groove reducing butterfly valve flange with DN200 x 150, DN200 x 125, DN200 x 100, DN200 x 80 or DN200 x 65 of 1.0 MPa.