CN216978069U - Pipeline drainage device for test section in large-diameter liquid flow standard device - Google Patents

Abstract

The utility model discloses a test section pipeline drainage device for a large-diameter liquid flow standard device, which comprises a test pipeline drainage ball valve water outlet pipe, a test pipeline drainage ball valve water inlet pipe, a test pipeline air inlet ball valve and a test pipeline air inlet ball valve air inlet pipe. The water outlet pipe of the test pipeline drainage ball valve and the water inlet pipe of the test pipeline drainage ball valve are connected with two ends of the test pipeline drainage ball valve, and the air inlet pipe of the test pipeline air inlet ball valve are connected with two ends of the test pipeline air inlet ball valve; a water inlet of a water inlet pipe of the test pipeline drainage ball valve is fixedly connected with an opening below the short connecting pipe of the front straight pipe section; and the air outlet of the test pipeline air inlet pipe is fixedly connected with the opening above the front straight pipe section short joint. The utility model has the advantages of simple structure, strong durability, safety and reliability, and effectively solves the drainage problem of the test section pipeline in the large-caliber liquid flow standard device.

Description

Pipeline drainage device for test section in large-diameter liquid flow standard device

technical field

The utility model belongs to the field of flow detection, in particular to a test section pipeline drainage device used in a large-diameter liquid flow standard device.

Background technique

As shown in FIG. 1 , in the large-diameter liquid flow standard device, when the instrument to be tested 10 is detected, the instrument to be tested 10 needs to be removed from between the front straight pipe section 9 and the rear straight pipe section 11 of the large-diameter liquid flow standard device , Due to the large diameter of the pipeline, even if the front on-off ball valve 8 and the rear on-off ball valve 12 are closed, there is still a large amount of water under pressure in the pipeline between the front on-off ball valve 8 and the rear on-off ball valve 12. The water in the static state under pressure in the pipeline is removed in advance, and the instrument under test 10 between the front straight pipe section 9 and the rear straight pipe section 11 is directly removed, and a large amount of static water under pressure in the pipeline will be The gaps between the straight pipe section 9 and the instrument under test 10 and the rear straight pipe section 11 and the instrument under test 10 are sprayed out, which brings the threat of water spray to other instruments on the device, the instrument under test 10 and the dismantling personnel.

In order to avoid this problem, the current method is to set a drain pipe in front of the front straight pipe section 9, and a drain valve is installed on the drain pipe. When the water in the pipe is completely drained, close the front switch ball valve 8, keep the rear switch ball valve 12 open, and then open the drain valve to remove a large amount of water in the front straight pipe section 9, the rear straight pipe section 11 and the back pressure pipe 13. The safety when the instrument under test 10 is removed can be guaranteed.

Although the method of keeping the back on-off ball valve open at present is feasible to remove the water in the pipeline between the front on-off ball valve and the rear on-off ball valve, it is feasible to solve the problem of negative pressure in the pipeline during drainage, and the drainage is slow or the water cannot be discharged. However, in the large-diameter liquid flow standard device, the diameter of the back pressure pipe is usually relatively large, so there will also be a large amount of water in the pipeline. The on-off ball valve remains open, and a large amount of water in the back pressure pipe is also drained through the drain pipe at the same time. Because the water in the pipe between the front switch ball valve and the rear switch ball valve and the water in the back pressure pipe are large, and the drain pipe The caliber is usually small, so it takes a long time to drain the water through the drain pipe, which seriously affects the work efficiency of the large-caliber liquid flow standard device to detect the flowmeter. Therefore, the above problems must be solved, and the lifting device detection efficiency.

SUMMARY OF THE INVENTION

In order to better solve the above-mentioned technical problems, the utility model provides a test section pipeline drainage device used in a large-diameter liquid flow standard device. Balloon valve intake pipe, test pipe intake balloon valve, test pipe intake pipe), which solves the problem of negative pressure in the pipeline when the front switch ball valve and the rear switch ball valve are closed to discharge water to the pipeline in the test section, and shortens the test section. Pipeline drainage time improves the overall detection efficiency of the device.

To achieve the above purpose, the technical scheme adopted by the present utility model is:

The pipeline drainage device in the test section of the large-diameter liquid flow standard device mainly includes: the outlet pipe of the test pipeline drainage ball valve, the test pipeline drainage ball valve, the test pipeline drainage ball valve water inlet pipe, the test pipeline inlet balloon valve inlet pipe, the test pipeline inlet balloon valve and Test duct intake pipe.

The water inlet of the water inlet pipe of the test pipeline drainage ball valve is fixedly connected with the opening under the short pipe of the front straight pipe section, the water outlet of the water inlet pipe of the test pipeline drainage ball valve is fixedly connected with the water inlet of the test pipeline drainage ball valve, and the water outlet of the test pipeline drainage ball valve is connected with the test pipe. The water inlet of the water outlet pipe of the pipe drainage ball valve is fixedly connected, and the water outlet of the water outlet pipe of the test pipe drainage ball valve extends into the underground pool; the air inlet of the air inlet pipe of the test pipe inlet ball valve is exposed to the atmosphere, and its air outlet is connected to the test pipe inlet. The air inlet of the balloon valve is fixedly connected, the air outlet of the air inlet valve of the test pipeline is fixedly connected to the air inlet of the air inlet pipe of the test pipeline, and the air outlet of the air inlet pipe of the test pipeline is fixedly connected to the opening above the short connection of the front straight pipe section.

Further, the air inlet pipe of the test pipeline into the balloon valve adopts an inverted "L" shape, which is used to prevent foreign matter from entering the air inlet pipe of the test pipeline into the balloon valve.

Compared with the prior art, the beneficial effects of the present utility model are:

The utility model solves the problem that negative pressure occurs in the pipeline when the front switch ball valve and the rear switch ball valve are closed to discharge water to the test section pipeline by setting the large-diameter liquid flow standard device The pipes drain quickly.

The utility model has the advantages of simple structure, strong durability, safety and reliability, well solves the drainage problem of the pipeline in the test section of the large-diameter liquid flow standard device, shortens the drainage time of the device, and improves the overall working efficiency of the device.

Description of drawings

Figure 1 is a structural diagram of a large-diameter liquid flow standard device and a pipeline drainage device in the test section.

Figure 2 is a schematic structural diagram of the pipeline drainage device in the test section of the present invention.

In the figure: 1. Outlet pipe of test pipeline drainage ball valve; 2. Test pipeline drainage ball valve; 3. Inlet pipe of test pipeline drainage ball valve; 4. Test pipeline inlet pipe; Intake pipe; 7. Short pipe of front straight pipe section; 8. Front on-off ball valve; 9. Front straight pipe section; 10. Tested instrument; 11. Rear straight pipe section; 12. Back on-off ball valve; 13. Back pressure pipe; 14. Adjustment Ball valve; 15. Rear header pipe; 16. Front header pipe; 17. Water inlet pipe of front switch ball valve; 18. Water pressure tank outlet switch ball valve; .

Detailed ways

In the large-diameter liquid flow standard device, the test pipeline air inlet device is added at the test pipeline drainage ball valve to form a test section pipeline drainage device, which solves the problem that the front switch ball valve and the rear switch ball valve are both closed. There is a negative pressure problem when the water is discharged.

As shown in Figures 1 and 2, the pipeline drainage device in the test section mainly includes the outlet pipe of the test pipeline drainage ball valve 1, the test pipeline drainage ball valve 2, the test pipeline drainage ball valve water inlet pipe 3, the test pipeline intake pipe 4, and the test pipeline inlet pipe. Balloon valve 5, test pipeline into balloon valve inlet pipe 6.

In the large-diameter liquid flow standard device, the water pump 21 is connected to the surge tank 19 through the surge tank water inlet switch ball valve 20, and the surge tank 19 water outlet is connected to the front manifold 16 and the front switch ball valve through the surge tank water outlet switch ball valve 18. The water inlet pipe 17, the water inlet pipe 17 of the front switch ball valve is connected with the water inlet of the front switch ball valve 8, and the water outlet of the front switch ball valve 8 is connected with the short pipe 7 of the front straight pipe section. The water inlet of the water inlet pipe 3 of the test pipeline drainage ball valve is fixedly connected with the opening below the short pipe 7 of the front straight pipe section, the water outlet of the water inlet pipe 3 of the test pipeline drainage ball valve is fixedly connected with the water inlet of the test pipeline drainage ball valve 2, and the test pipeline drainage ball valve 2 outlet is fixedly connected. The water outlet is fixedly connected with the water inlet of the water outlet pipe 1 of the test pipeline drainage ball valve, and the water outlet of the water outlet pipe 1 of the test pipeline drainage ball valve extends into the underground pool; The air outlet is fixedly connected with the air inlet of the air inlet valve 5 of the test pipe, the air outlet of the air inlet valve 5 of the test pipe is fixedly connected with the air inlet of the air inlet pipe 4 of the test pipe, and the air outlet of the air inlet pipe 4 of the test pipe is connected with the front straight pipe section. The opening above the short tube 7 is fixedly connected. The instrument under test 10 is installed between the front straight pipe section 9 and the rear straight pipe section 11. The rear straight pipe section 11 is connected to the rear header pipe 15 and the back pressure pipe 13 through the rear switch ball valve 12. The rear switch ball valve 12 and the back pressure pipe 13 are provided with regulating ball valves 14.

The air inlet pipe 6 of the test pipeline into the balloon valve is an inverted "L" shape, which effectively prevents foreign matter from entering the test pipeline into the balloon valve air inlet 6 through the air inlet of the test pipeline into the balloon valve inlet pipe 6 exposed to the air.

After the large-diameter liquid flow standard device is tested, it is necessary to drain the water in the pipeline of the test section before disassembling the instrument under test in the pipeline of the test section. By controlling the opening sequence relationship between the test pipeline drainage ball valve 2 and the test pipeline inlet valve 5, the pipeline drainage of the test section according to the present utility model can be better realized.

The specific working process of the pipeline drainage device in the test section of the utility model is as follows:

1) When the test instrument 10 is completed, close the front switch ball valve 8 and the rear switch ball valve 12;

2) Open the drain ball valve 2 of the test pipeline;

3) Open the test pipeline into the balloon valve 5, and wait for the water in the pipeline between the front switch ball valve 8 and the rear switch ball valve 12 to be drained clean;

6) After the drainage is completed, close the test pipeline drain ball valve 2 and the test pipeline inlet balloon valve 5, and remove the tested instrument 10 from between the front straight pipe section 9 and the rear straight pipe section 11 of the large-diameter liquid flow standard device.

Claims (2)

1. A test section pipeline drainage device for among heavy-calibre liquid flow standard device, its characterized in that:

the device comprises a test pipeline drainage ball valve water outlet pipe, a test pipeline drainage ball valve water inlet pipe, a test pipeline air inlet ball valve air inlet pipe, a test pipeline air inlet ball valve and a test pipeline air inlet pipe;

the water inlet of the water inlet pipe of the test pipeline drainage ball valve is fixedly connected with the opening below the short connecting pipe of the front straight pipe section, the water outlet of the water inlet pipe of the test pipeline drainage ball valve is fixedly connected with the water inlet of the water outlet pipe of the test pipeline drainage ball valve, the water outlet of the test pipeline drainage ball valve is fixedly connected with the water inlet of the water outlet pipe of the test pipeline drainage ball valve, and the water outlet of the water outlet pipe of the test pipeline drainage ball valve extends into the underground water pool;

the air inlet of the air inlet ball valve air inlet pipe of the test pipeline is exposed in the atmosphere, the air outlet of the air inlet ball valve air inlet pipe is fixedly connected with the air inlet of the air inlet ball valve of the test pipeline, the air outlet of the air inlet ball valve of the test pipeline is fixedly connected with the air inlet of the air inlet pipe of the test pipeline, and the air outlet of the air inlet pipe of the test pipeline is fixedly connected with the hole formed in the upper part of the front straight pipe section short joint.

2. The test segment pipeline drainage device for the large-caliber liquid flow standard device according to claim 1, wherein: the air inlet pipe of the air inlet ball valve of the test pipeline is in an inverted L shape.

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