CN102046971B

CN102046971B - Method and device for conveying compressed gas

Info

Publication number: CN102046971B
Application number: CN2009801194660A
Authority: CN
Inventors: E·胡塔; T·霍因梅塞
Original assignee: Leobersdorfer Maschinenfabrik GmbH
Current assignee: Leobersdorfer Maschinenfabrik GmbH
Priority date: 2008-05-28
Filing date: 2009-05-25
Publication date: 2013-09-11
Anticipated expiration: 2029-05-25
Also published as: EP2300713A1; AT506905A1; ATE555307T1; WO2009143547A1; PL2300713T3; EA017921B1; CN102046971A; EP2300713B1; AT506905B1; EA201071383A1

Abstract

The invention relates to a method and device for conveying compressed gas into at least two mutually separate pipeline sections (6, 7), wherein gas is compressed and conveyed into a first pipeline section (6), a connection is subsequently produced between the two pipeline sections (6, 7) such that the compressed gas flows from the first pipeline section (6), on account of the excess pressure, into a second pipeline section (7), and gas from the first pipeline section (6) is subsequently compressed and conveyed into the second pipeline section (7).

Description

Method and apparatus for delivery of pressurized gas

Technical field

The present invention relates to a kind of for will the compression gas be transported at least two separated pipe sections method and a kind of with the compression gas be transported at least two devices in the separated pipe section, described device has at least one compressor, each described compressor is connected with pipe section by a gas transmission pipeline respectively, wherein, two gas transmission pipelines have a valve respectively.

Background technique

In order to detect the sealing of pipeline, particularly pipeline, carry out pressure testing/applied voltage test (Abdr ü cken) to each single section, with the gas fill pipe section of compression and through determining after the time period of determining, be that pressure is maintained namely, the pressure loss still occurred.

Up to now common gas, particularly air are imported in first pipe section for this reason, implement performing leak test in first pipe section, then the gas that will compress in high pressure range usually under high pressure, namely exporting to the surrounding environment under about pressure of 100 to 150bar.Carry out identical operations for second pipe section and other pipe section.Here shortcoming particularly in, for the employed energy consumption of pressurized air after sealing test finishes not markon's land used be discharged in the surrounding environment.

By the known a kind of special compression device of DE 93 16 738 U1, utilize this compression device to detect pipeline with regard to its sealing by pressure testing.

In WO 2007/079514A1, in another case, namely under the situation that the natural gas line of filling with the gas that is under the pressure is keeped in repair, suggestion arranges multistage pressure piston formula compressor for the by-pass line between prior separated each pipe section, therefore gas can be transported to another pipe section from a pipe section.

Summary of the invention

Relative therewith, the objective of the invention is to, a kind of method and device that starts described type is provided, utilize this method and device to make it possible to pipe section, particularly pipeline are carried out energy-optimised pressure testing.

This purpose so realizes according to the present invention, pressurized gas also is transported in first pipe section, then set up two connections between the pipe section, thereby the gas of compression compresses the gas from first pipe section subsequently and is transported in second pipe section because overvoltage overflows to second pipe section from first pipe section.Therefore according to pressing method of the present invention, at first fill first pipe section with the gas of compression, after the sealing in detecting this pipe section, not that gas is exported in the surrounding environment as common so far, but be used at least one other pipe section is continued to detect.Can at first utilize the overvoltage that is transported to the gas in first pipe section for this reason, when adjust to same stress level basically in two pipe sections after, the gas that just will also be in first pipe section is extracted out from this pipe section and is carried it in second pipe section under pressure.Can realize the energy saving of about 1:3 thus with respect to known so far method, can realize that equally the time of half is saved approximately.

Aspect the pressure testing of two special energy-efficients of pipe section (efficiency), advantageously at first in a low pressure range, gas is delivered directly in first pipe section, then in a high pressure range, precompressed gas in described low pressure range is further compressed at least one times, just the gas of compression is imported in the first pressure piping section afterwards.

Here preferably, in described low pressure range, realize gas is compressed between 5bar and the 30bar, particularly is compressed to and is essentially 15bar, and in described high pressure range, realize with gas be compressed to 70 and 150bar between, particularly be compressed to and be essentially 100bar.Certainly the compression in low pressure and particularly high pressure range can single-stage or multistage ground (namely in a plurality of active chambers) carry out.Guaranteed thus in low pressure range and the compression of in high pressure range, comparing the high energy efficiency that is about 1: 2, reached the stress level of about 100bar common in the pressurized gas pipeline in addition.

If after gas freely overflows to second pipe section from first pipe section, in first pipe section, still at first after high pressure compressed, be transported in second pipe section by precompressed gas, and after the gas pressure level in first pipe section reduces, in order to deliver gas in second pipe section, at first in low pressure range, gas is being compressed before the high pressure compressed, then realize special high energy efficiency ground gas transfer from first pipe section, and fill at least one second pipe section.Basically this transfer can have three phases, wherein, and at first because different stress levels has been guaranteed free overflow.Then, namely two stress levels in two pipe sections are basically after the balance, can directly carry out the high pressure compressed of high energy efficiency, delivering gas in second pipe section, this is because the stress level in first pipe section still higher (for example being approximately 50bar).After can't carrying out the direct high pressure compressed of high energy efficiency again, after namely the stress level in first pipe section obviously reduces, just at first in low pressure range, also then in high pressure range, (sucking from surrounding environment) gas is compressed.

The device that starts described type is characterised in that each gas transmission pipeline interconnects by the by-pass line with valve.By between compressor and at least two pipe sections, a by-pass line with valve that has the gas transmission pipeline of valve and each gas transmission pipeline of connection is set being set respectively, can be optionally, namely according to the setting of valve, at first deliver gas in first pipe section, then can open each valve, thereby the free overflow can realizing from first pipe section to second pipe section can be brought in second pipe section via the air that another gas transmission pipeline will pump out from first pipe section at last.Aspect the pressure testing of pipe section being carried out high energy efficiency, obtained thus with described method in front in identical advantage, therefore for fear of repeat can be with reference to the explanation of front.

In addition, advantageously, at least one low pressure compression stage and high pressure compressed level are set aspect the pressure testing of at least two pipe sections being carried out high energy efficiency, they interconnect by the compression pipe with valve.Low pressure stage and high pressure stage itself also can be configured to multistage.Thus, as long as in first pipe section, also there is enough precompressed gas, then only use the high pressure compressed level, and after the decline of the stress level in first pipe section, be transformed into low pressure and high pressure compressed.This moment can be from surrounding environment or from the first pipe section intake-gas.

In order can at first precompressed gas in low pressure range to be transported in first pipe section, in order to stop the gas that will in low pressure stage, compress directly to be fed in first gas transmission pipeline selectively, and in order therefore precompressed gas to be transported in the high pressure stage, advantageously, branch out the low-pressure connection tube road with valve between low pressure compression stage and compressor pipeline valve, this low-pressure connection tube road is connected with first gas transmission pipeline.

If the high pressure compressed level is connected with second gas transmission pipeline by the high pressure connecting tube with valve at outlet side, then can prevent from entering the exit region of high pressure compressed level at gas gas (partly) of overflow when first pipe section overflows to second pipe section.

Advantageously, low pressure compression stage and high pressure compressed level have common driver element aspect the drive unit simple in structure of low pressure compression stage and high pressure compressed level, and each compression stage is connected with this driver element by a switchable part that is coupled respectively.Can activate low pressure stage and high pressure stage selectively by means of the switchable part that is coupled thus.Can certainly two special driving unit be set for low pressure compression stage and high pressure compressed level.

Screw compressor preferably is set as the low pressure compression stage, and the Reciprocting piston compressor that one or more levels is set is as the high pressure compressed level.Can certainly use other type of compressor as low pressure compression stage and high pressure compressed level.Therefore can for example use piston compressor with a plurality of cylinders and other the blower with a plurality of active chambers, screw compressor, turbocompressor or vacuum compressor and similar device.

Description of drawings

Describe the present invention in detail by means of the preferred embodiment shown in the accompanying drawing below, but the present invention is limited to these embodiments in no instance.Particularly in the accompanying drawings:

The circuti diagram of the schematically illustrated compression system of Fig. 1, this compression system have two pipe sections and two compression stages with a common driver element, and wherein each valve of compression system connects like this, make to deliver gas to first pipe section from low pressure stage;

Fig. 1 a illustrates the circuti diagram similar to Fig. 1, but wherein is provided with for two special driving unit of two compression stages;

Fig. 2 schematically shows the circuti diagram corresponding to Fig. 1, but wherein carries out low pressure compression and high pressure compressed before the gas with compression imports first pipe section;

Fig. 2 a illustrates the circuti diagram corresponding to Fig. 2, but has the special driving unit for each compression stage;

Fig. 3 schematically shows the circuti diagram corresponding to Fig. 1 and 2, but wherein gas only is freely to overflow to second pipe section from first pipe section;

Fig. 3 a illustrates the circuti diagram corresponding to Fig. 3, but has the special driving unit for each compression stage;

Fig. 4 schematically shows the circuti diagram corresponding to Fig. 1 to 3, and wherein, precompressed gas enters the high pressure compressed level and import second pipe section after high compression in first pipe section;

Fig. 4 a illustrates the circuti diagram corresponding to Fig. 4, but has the special driving unit for each compression stage;

Fig. 5 illustrates the circuti diagram according to Fig. 1 to 4, and wherein, the gas of importing in second pipe section at first compresses in low pressure stage, and then compresses in high pressure stage subsequently; And

Fig. 5 a illustrates the circuti diagram corresponding to Fig. 5, but is provided with the special driving unit for each compression stage.

Embodiment

Compressor 1 with low pressure stage 2 and high pressure stage 3 has been shown among Fig. 1 and Fig. 1 a.Compressor 1 is connected with first pipe section 6 by first gas transmission pipeline 4 and is connected with second pipe section 7 by second gas transmission pipeline 5.In gas transmission pipeline 4,5, be respectively equipped with stop valve 8 or 9, thereby can control selectively by two gas transmission pipelines 4,5 inlet stream and exhaust stream.Two gas transmission pipelines 4,5 interconnect by by-pass line 10, and this by-pass line has stop valve equally, and namely bypass valve 11.

Two compression stages, namely low pressure compression stage 2 and high pressure compressed level 3 interconnect by compression pipe 12, are provided with stop valve in the compression pipe equally, and namely compression valve 13.Screw compressor 2 is set in an illustrated embodiment as low pressure compression stage 2, and Reciprocting piston compressor is set as high pressure compressed level 3, they have a common driver element 14 in the embodiment shown in Fig. 1.In order optionally low pressure stage 2 or high pressure stage 3 to be connected on the driver element 14, be respectively equipped with

switchable part

15 or 16 of being coupled.In the working position shown in Figure 1, be coupled part 15 and be in the state that is coupled, thereby drive low pressure stage 2 by driver element 14; Be coupled part 16 on the contrary in taking off the position of coupling, so high pressure compressed level 3 is not worked.

Replace one to have

switchable part

15,16 the common driver element 14 of being coupled, also can be provided for (two) special driving unit 14 ', 14 of low pressure compression stage 2 and high pressure compressed level 3 " (referring to Fig. 1 a); In the working position shown in Fig. 1 a, corresponding to Fig. 1, driver element 14 ' is in the work, and driver element 14 in contrast " do not work.

Be provided with safety check 17 in this external compression pipe 12, this safety check only allows through-flow towards the direction of first pipe section 6 or high pressure compressed level 3.Go out low-pressure connection tube road 19 from compression pipe 12 top sets between this external safety check 17 and the compression pipe valve 13, this low-pressure connection tube road feeds in first gas transmission pipeline 4.Low-pressure connection tube road 19 also has stop valve 20.

High pressure compressed level 3 is connected with second gas transmission pipeline 5 by high pressure connecting tube 21 at outlet side.Also be provided with stop valve 22 in the high pressure connecting tube 21.

In the working position shown in Fig. 1 and the 1a, the screw compressor that is set to low pressure compression stage 2 drives by driver element 14 or 14 ', is delivered directly in first pipe section 6 thereby suck the air that ambient air and the valve 20 by opening, 8 will (i.e. the highest about 15bar) compresses in low pressure range.

After existence in first pipe section utilizes low pressure compression stage 2 attainable stress levels,

stop valve

20,13,22 and 11 is switched, thereby be set in the Reciprocting piston compressor of high pressure stage 3 by the importing of compression connecting tube 12 precompressed airs, in this compressor, realize the high pressure compressed (referring to Fig. 2,2a) of about 100bar.

Therefore

stop valve

13,22,11 and 8 is switched to its open position, on the contrary, the same with stop valve 9 in second gas transmission pipeline 5, stop valve 20 is closed.Therefore the screw compressor that is set to low pressure stage 2 sucks air from surrounding environment, with air precompression in screw compressor, then carry out high pressure compressed in the Reciprocting piston compressor of high pressure stage 3; Follow compressed air delivery in first pipe section 6.

In case finish the pressure testing to first pipe section 6, namely the performing leak test of first pipe section 6 finishes, and makes the air of high compression transfer to (referring to Fig. 3,3a) second pipe section 7 from first pipe section 6.Reciprocting piston compressor in screw compressor in low pressure stage 2 and the high pressure stage 3 here is coupled or

driver element

14,14 ', 14 with driver element 14 disengagings " stop.

For the air of high compression is directly shifted from first pipe section 6, with the valve 8 in the gas transmission pipeline 4,5,9 and by-pass line 10 in valve 11 place its open position; Valve 20 in the low-pressure connection tube road 19 and the valve 22 in the high pressure connecting tube 21 are positioned at its closed position on the contrary.Therefore the air of high compression overflows to second pipe section 7 from the pipe section 6 with obviously higher stress level, adjusts to identical stress level basically until two

pipe sections

6,7, for example about 50bar.

As shown in Fig. 4 and 4a, after in

pipe section

6,7, adjusting to identical stress level, stop valve 11 in the by-pass line 10 is closed, valve 20, the valve 13 in the compression pipe 12 and the stop valve 22 in the high pressure connecting tube 21 in the low-pressure connection tube road 19 are opened, thereby in first pipe section 6 still under about 50bar for example precompressed gas be connected on the driver element 14 or its driver element 14 " in the high pressure compressed level 3 that is activated by high pressure compressed, be transported in second pipe section 7 by gas transmission pipeline 5 then.

Therefore in this job step, can cancel the precompression of the gas that is undertaken by low pressure compression stage 2, and will still be arranged in the gas continuation use of first pipe section 6 so that second pipe section 7 is carried out pressure test for energy-optimised.

Stress level in first pipe section 6 only is reduced to no longer can realize effective high pressure compressed by means of the compression by the Reciprocting piston compressor in the high pressure compressed level 3, final by low pressure compression stage 2 suction ambient airs, this precompressed air is high compression in high pressure compressed level 3 then, and importing second pipe section 7, so that this pipe section is carried out pressure testing under about pressure of 100 to 150bar by high pressure connecting tube 21, airflow pipe 5 pressurized air with high compression.In addition as shown in Fig. 5 and 5a, valve 8 in the gas transmission pipeline 4 and the valve 20 in the low-pressure connection tube road 19 are closed, and be arranged on screw compressor in the low pressure compression stage 2 and the Reciprocting piston compressor in the high pressure compressed level 3 be coupled to equally on the driver element 14 (perhaps two driver elements 14 ', 14 " work; See Fig. 5 a).

Can realize in the mode of high energy efficiency thus a plurality of

pipe sections

6,7 pressure testing.Certainly the pressurized air in importing second pipe section 7 can be used for the pressure testing of another pipe section equally by previously described method and

mode.Stop valve

8,9,11,13,20,22 opening and closing can manually realize or control automatically and regulate.Essence of the present invention only is, can carry out pressure testing at least two pipe sections, particularly pipeline by aforesaid method and aforesaid device in the mode of high energy efficiency with respect to known system.

Claims

1. for detection of the method for the sealing of pipeline, described pipeline has at least two separated pipe sections (6,7), wherein, gas is compressed, and deliver gas in first pipe section (6), it is characterized in that, after the sealing that detects first pipe section (6), at two pipe sections (6,7) connect between, thereby the gas of compression is because overvoltage overflows in second pipe section (7) from first pipe section (6), when adjust to substantially the same stress level in two pipe sections after, the gas that just will also be in first pipe section (6) is extracted out and is taken under pressure in second pipe section (7).

2. method according to claim 1, it is characterized in that, at first in a low pressure range, gas is delivered directly in first pipe section (6), then in a high pressure range precompressed gas in low pressure range is further compressed at least one times, the gas with compression is transported in first pipe section (6) then.

3. method according to claim 2 is characterized in that, in described low pressure range, realize with gas be compressed to 5 and 30bar between, and in described high pressure range, realize with gas be compressed to 70 and 150bar between.

4. method according to claim 3 is characterized in that, realizes gas is compressed in described low pressure range being essentially 15bar, is essentially 100bar and realize gas is compressed in described high pressure range.

5. according to each described method of claim 2 to 4, it is characterized in that, after gas freely overflows to second pipe section (7) from first pipe section (6), will be in first pipe section (6) still precompressed gas at first after high pressure compressed, be transported in second pipe section (7), after the stress level of the gas in first pipe section (6) descends, in order to deliver gas in second pipe section (7), at first in described low pressure range, gas is being compressed before the high pressure compressed at least.

6. for detection of the device of the sealing of pipeline, described pipeline has at least two separated pipe sections (6,7), described device has at least one compressor (1), described compressor is connected with a pipe section (6,7) by a gas transmission pipeline (4,5) respectively, wherein two gas transmission pipelines (4,5) have a stop valve (8,9) respectively, it is characterized in that each gas transmission pipeline (4,5) interconnects by the by-pass line (10) with stop valve (11).

7. device according to claim 6 is characterized in that, is provided with at least one low pressure compression stage (2) and high pressure compressed level (3), and described low pressure compression stage and high pressure compressed level interconnect by the compression pipe (12) with valve (13).

8. device according to claim 7 is characterized in that, branches out the have valve low-pressure connection tube road (19) of (20) between low pressure compression stage (2) and compression pipe valve (13), and described low-pressure connection tube road is connected with first gas transmission pipeline (4).

9. according to claim 7 or 8 described devices, it is characterized in that high pressure compressed level (3) is connected with second gas transmission pipeline (5) by the high pressure connecting tube (21) with valve (22) at outlet side.

10. device according to claim 7, it is characterized in that, low pressure compression stage (2) and high pressure compressed level (3) have common driver element (14), and low pressure compression stage (2) is connected with described driver element by a switchable part (15,16) that is coupled respectively with high pressure compressed level (3).

11. device according to claim 7 is characterized in that, screw compressor is set as low pressure compression stage (2), and Reciprocting piston compressor is set as high pressure compressed level (3).

12. device according to claim 6 is characterized in that, described pipeline is pipeline.