A multi-station integrated pressure testing method

Abstract

The present invention belongs to the technical field of pressure test equipment for pressure-bearing equipment, and specifically relates to a multi-station integrated pressure test method. The present invention realizes the functions of rapid water injection, exhaust, pressure boosting, pressure maintenance, pressure relief, and drainage for multiple pressure test pipelines according to different pressure levels through the two steps of rapid water injection and pressure test and the four processes in step 2; at the same time, it reduces the high cost of pressure testing, reduces material waste, reduces labor intensity, improves pressure testing efficiency, and reduces the safety risk of welding temporary short sections to connect segmented pipelines.

Description

Technical Field

[0001] The invention belongs to the technical field of downhole control tools in the petroleum industry, and in particular relates to a multi-station integrated pressure testing method. Background Art

[0002] At present, during the pressure test of the process pipeline of the integrated integrated device of the oil and gas field, due to the different pressure levels of the process pipeline, there are some systems, equipment, instruments, meters, valves, etc. that are not suitable for pressure testing together with the pipeline. They need to be isolated and pressure tested in sections according to the pressure levels. The number of sectioned pipelines is large, and the difficulty of pressure testing increases.

[0003] The existing technology is to use a single pump for a single pipeline, or multiple pumps correspond to a single pipeline one by one, or after removing some systems, equipment, instruments, meters, valves, etc. that are restricted by the pressure test, install and weld temporary short sections to connect the segmented pipelines, and after the pressure test is completed, remove the connecting short sections and restore some systems, equipment, instruments, meters, and valves. This outdated technology has high pressure test costs, wastes materials, has high labor intensity, and has low pressure test efficiency. In addition, welding temporary short sections to connect segmented pipelines poses great safety risks.

[0004] Therefore, an integrated pressure testing method is needed for multiple pressure test pipelines at the same time, which meets different pressure levels and multiple pressure test processes, to meet the rapidly growing production needs. Summary of the invention

[0005] The present invention provides a multi-station integrated pressure testing method, aiming to provide a method for simultaneously conducting pressure tests on multiple pressure testing pipelines that conform to different pressure levels and multiple pressure testing processes.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A multi-station integrated pressure test method comprises the following steps:

[0008] Step 1: Determination of pressure test conditions

[0009] When the diameter of the pressure test pipe in the pressure test pipeline is ≥ DN40, the length of the pressure test pipe meets the volume ≥ 0.3m 3 When the required test stations are ≤3, use process 1 and process 3 or process 2 and process 4; when the test pressure pipe diameter is ≥DN40, the test pressure pipe length meets the volume ≥0.3m 3 When the required test stations are greater than 3, use process 1, process 2, process 3 and process 4; when the test pressure pipe diameter in the test pressure pipeline is less than DN40, or the test pressure pipe diameter is ≥ DN40 and the length meets the volume requirement of less than 0.3m 3If the required test stations are ≤3, use process 3 or process 4; when the test pressure pipe diameter in the test pressure pipeline is <DN40, or the test pressure pipe diameter is ≥DN40 and the length meets the volume <0.3m 3 If the required test stations are greater than 3, use process 3 and process 4;

[0010] Step 2: Test process division

[0011] Process 1: When quickly filling and exhausting water before the pressure test, the external tap water enters the water tank buffer zone for filtration through the low-pressure solenoid valve at the water filling pipe outlet, enters the water tank clean water area after filtration, and enters the water injection pump for water injection through the water outlet ball valve through the first filter and the pump end ball valve; from the outlet of the water injection pump through the third one-way valve and the first water inlet electric ball valve into the first distributor; the first of the three high-pressure outlet pipelines of the first distributor passes from the high-pressure outlet through the first gas-electrically controlled stop valve and the first high-pressure solenoid valve in parallel, and then passes through the first pressure test pipeline and the first automatic exhaust valve in turn into the sewage main pipe for exhaust and drainage; the second route in the first distributor, From the high-pressure outlet, through the pipeline of the second gas-electrically controlled stop valve and the second high-pressure solenoid valve in parallel, it enters the sewage main pipe for exhaust and drainage through the second pressure test pipeline and the second automatic exhaust valve in turn; the third route in the first distributor, from the high-pressure outlet, through the pipeline of the third gas-electrically controlled stop valve and the third high-pressure solenoid valve in parallel, enters the sewage main pipe for exhaust and drainage through the third pressure test pipeline and the third automatic exhaust valve in turn; three fast water injection exhaust pipelines are formed; when the exhaust is completed, the first automatic exhaust valve, the second automatic exhaust valve, and the third automatic exhaust valve are closed; after the pressure test is completed, the first distributor discharges water into the sewage main pipe through the first sewage electric valve;

[0012] Process 2: When quickly filling and exhausting water before the pressure test, the external tap water enters the water tank buffer zone through the water filling pipe port and the low-pressure solenoid valve for filtration, and then enters the water tank clean water area after filtration, and enters the water injection pump through the outlet ball valve through the first filter and the pump end ball valve for water injection; from the outlet of the water injection pump through the third one-way valve and the second water inlet electric ball valve to enter the second distributor; the first of the three high-pressure outlet pipelines of the second distributor, from the high-pressure outlet through the fourth gas electric control stop valve and the fourth high-pressure solenoid valve in parallel, enters the sewage main pipe for exhaust and drainage through the fourth pressure test pipeline and the fourth automatic exhaust valve in turn; the second in the second distributor , from the high-pressure outlet through the pipeline of the fifth gas electronically controlled stop valve and the fifth high-pressure solenoid valve in parallel, it passes through the fifth pressure test pipeline and the fifth automatic exhaust valve in turn to enter the sewage main pipe for exhaust and drainage; the third route in the second distributor, from the high-pressure outlet through the pipeline of the sixth gas electronically controlled stop valve and the sixth high-pressure solenoid valve in parallel, it passes through the sixth pressure test pipeline and the sixth automatic exhaust valve in turn to enter the sewage main pipe for exhaust and drainage; three fast water injection exhaust pipelines are formed; when the exhaust is completed, the fourth automatic exhaust valve, the fifth automatic exhaust valve, and the sixth automatic exhaust valve are closed; after the pressure test is completed, the second distributor discharges water into the sewage main pipe through the second drainage electric valve;

[0013] Process 3: During the pressure test, external tap water enters the water tank buffer zone for filtration through the water supply pipe and the low-pressure solenoid valve, enters the water tank clean area after filtration, enters the first high-pressure pump through the outlet ball valve through the second filter and the electric three-way ball valve, and enters the first high-pressure pump outlet through the first one-way valve into the first distributor. The first of the three high-pressure outlet pipelines of the first distributor passes through the first gas-electrically controlled stop valve and the first high-pressure solenoid valve in parallel from the high-pressure outlet, and then passes through the first pressure test pipeline and the first automatic exhaust valve into the sewage main pipe for exhaust and drainage. ; The second route in the first distributor, from the high-pressure outlet, passes through the second gas-electrically controlled stop valve and the second high-pressure solenoid valve in parallel, and then passes through the second pressure test pipeline and the second automatic exhaust valve to enter the sewage main pipe for exhaust and water discharge; the third route in the first distributor, from the high-pressure outlet, passes through the third gas-electrically controlled stop valve and the third high-pressure solenoid valve in parallel, and then passes through the third pressure test pipeline and the third automatic exhaust valve to enter the sewage main pipe for exhaust and water discharge; three pressure test pipelines are formed; when the pressure starts to increase, the first pump end valve, the first automatic exhaust valve, and the second automatic exhaust valve are connected to the first pump end valve, the first automatic exhaust valve, and the second automatic exhaust valve. The first gas-electrically controlled stop valve and the third automatic exhaust valve are all closed; the pressure is increased at a preset speed; when the pressure is increased to the preset test pressure value, the first gas-electrically controlled stop valve, the second gas-electrically controlled stop valve and the third gas-electrically controlled stop valve are all closed; the first pump-end valve is connected to the first high-pressure pump outlet pipeline, and the first pump-end valve is used to release the pressure to the first high-pressure pump end; the pressure relief port of the first distributor is connected to the sewage main pipe through the first container valve and the first servo overflow valve in turn; and the pressure relief port of the first distributor is used to release the pressure to the first distributor and the pipeline at a preset speed; after the pressure maintenance is completed, the first container valve and the first servo overflow valve are closed first. The valve is closed, and then the first gas-electrically controlled stop valve, the second gas-electrically controlled stop valve, and the third gas-electrically controlled stop valve are all opened, and the pressure relief port of the first distributor and the first pressure test pipeline, the second pressure test pipeline, and the third pressure test pipeline are relieved from the first distributor and the first pressure test pipeline, the second pressure test pipeline, and the third pressure test pipeline in sequence through the first container valve and the first servo relief valve at a preset speed. When the pressure value drops to the preset value, the first automatic exhaust valve, the second automatic exhaust valve, and the third automatic exhaust valve are opened respectively to cooperate with the first servo relief valve to complete the pressure relief of the first distributor and the first pressure test pipeline, the second pressure test pipeline, and the third pressure test pipeline;

[0014] Process 4: During the pressure test, tap water from outside enters the water tank buffer zone through the water supply pipe port and the low-pressure solenoid valve for filtration, enters the water tank clean water area after filtration, enters the second high-pressure pump through the water outlet ball valve through the second filter and the electric three-way ball valve, and enters the second distributor from the outlet of the second high-pressure pump through the second one-way valve. The first of the three high-pressure outlet pipelines of the second distributor passes through the fourth gas electric control stop valve and the fourth high-pressure solenoid valve in parallel from the high-pressure outlet, and then passes through the fourth pressure test pipeline and the fourth automatic exhaust valve in turn into the sewage main pipe for exhaust and drainage; The second route in the second distributor starts from the high-pressure outlet through the pipeline of the fifth gas-electrically-controlled stop valve and the fifth high-pressure solenoid valve in parallel, and then passes through the fifth pressure test pipeline and the fifth automatic exhaust valve to enter the sewage main pipe for exhaust and water discharge; the third route in the second distributor starts from the high-pressure outlet through the pipeline of the sixth gas-electrically-controlled stop valve and the sixth high-pressure solenoid valve in parallel, and then passes through the sixth pressure test pipeline and the sixth automatic exhaust valve to enter the sewage main pipe for exhaust and water discharge; three pressure test pipelines are formed; when the pressure starts to increase, the second pump end valve, the fourth automatic exhaust valve, and the fifth automatic exhaust valve , the sixth automatic exhaust valve are all closed; the pressure is increased at a preset speed; when the pressure is increased to the preset test pressure value, the fourth gas electrically controlled stop valve, the fifth gas electrically controlled stop valve, and the sixth gas electrically controlled stop valve are all closed; the second pump end valve is connected to the second high-pressure pump outlet pipeline, and the second pump end valve is used to release the pressure to the second high-pressure pump end; the pressure relief port of the second distributor is connected to the sewage main pipe through the second container valve and the second servo overflow valve in turn; the pressure relief port of the second distributor is released to the second distributor and pipeline at a preset speed in turn; after the pressure maintenance is completed, the second container valve and the second servo overflow valve are first closed. The valve is closed, and then the fourth gas electrically controlled stop valve, the fifth gas electrically controlled stop valve and the sixth gas electrically controlled stop valve are all opened, and the pressure relief port of the second distributor and the fourth pressure test pipeline, the fifth pressure test pipeline and the sixth pressure test pipeline are relieved at a preset speed in sequence through the second container valve and the second servo relief valve. When the pressure value drops to the preset value, the fourth automatic exhaust valve, the fifth automatic exhaust valve and the sixth automatic exhaust valve are opened respectively to cooperate with the second servo relief valve to complete the pressure relief of the second distributor and the fourth pressure test pipeline, the fifth pressure test pipeline and the sixth pressure test pipeline.

[0015] The three fast water injection and exhaust pipelines in the first distributor in the process 1 can be quickly injected with water and exhausted by any one, any two or a combination of three at the same time.

[0016] The three fast water injection and exhaust pipelines in the second distributor in the process 2 can be quickly injected with water and exhausted by any one, any two or a combination of three at the same time.

[0017] Any one, any two or a combination of three of the pressure test pipelines in the first set of distributors in the process three are used for water injection, exhaust, pressure increase, pressure maintenance, pressure reduction and pressure relief.

[0018] Any one, any two or a combination of three of the pressure test pipelines in the second set distributor in the process four are used for water injection, exhaust, pressure increase, pressure maintenance, pressure reduction and pressure relief.

[0019] The first servo relief valve and the second servo relief valve in the process three and process four in step two are in the test pressure pipe diameter ≥ DN40 and the length meets the volume ≥ 0.3m 3 When the pressure is reduced, it opens; or when the pressure test pipe diameter is less than DN40, or the pressure test pipe diameter is greater than or equal to DN40, and the length satisfies the volume less than 0.3m 3 , it is turned on both during step-up and step-down.

[0020] The preset pressure increase rate in the process three and the process four is 0.07-0.12MPa / min; the preset pressure relief rate in the process three and the process four is 2-3MPa / min.

[0021] The preset pressure increase rate in the process three and the process four is 0.1 MPa / min.

[0022] Beneficial effects:

[0023] The present invention realizes functions such as rapid water injection, exhaust, pressure boosting, pressure maintenance, pressure relief, and drainage for multiple pressure test pipelines at different pressure levels; at the same time, it reduces the high cost of pressure testing, reduces material waste, reduces labor intensity, improves pressure testing efficiency, and reduces the safety risk of welding temporary short sections to connect segmented pipelines.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the experimental process flow of the present invention.

[0027] In the figure: 1-water filling pipe outlet; 2-low-pressure solenoid valve; 3-water tank buffer zone; 4-water tank water purification zone; 5-buffer zone sewage discharge ball valve; 6-water purification zone sewage discharge ball valve; 7-water outlet ball valve; 8-first pump end valve; 9-first filter; 10-second filter; 11-electric three-way ball valve; 12-first high-pressure pump; 13-pump end ball valve; 14-first check valve; 15-first sewage discharge electric ball valve; 16-water injection pump; 17-third check valve; 18-second high-pressure pump; 19-second pump end valve; 20-second check valve; 21-first servo overflow valve; 22-first container valve; 23-first central distributor; 24-first water inlet electric ball valve; 25-second servo overflow valve; 26-second water inlet electric ball valve; 27-second container valve; 28-second sewage discharge electric ball valve; 29-second central distributor; 30-first gas-electrically controlled stop valve; 31-first high-pressure solenoid valve; 32-first pressure test pipeline; 33-first automatic exhaust valve; 34-second gas-electrically controlled stop valve; 35-second high-pressure solenoid valve; 36-second pressure test pipeline; 37-second automatic exhaust valve; 38-third gas-electrically controlled stop valve; 39-third high-pressure solenoid valve; 40-third pressure test pipeline; 41-third automatic exhaust valve; 42-fourth gas-electrically controlled stop valve; 43-fourth high-pressure solenoid valve; 44-fourth pressure test pipeline; 45-fourth automatic exhaust valve; 46-fifth gas-electrically controlled stop valve; 47-fifth high-pressure solenoid valve; 48-fifth pressure test pipeline; 49-fifth automatic exhaust valve; 50-sixth gas-electrically controlled stop valve; 51-sixth high-pressure solenoid valve; 52-sixth pressure test pipeline; 53-sixth automatic exhaust valve; 54-sewage main pipe. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example:

[0030] refer to Figure 1 , a multi-station integrated pressure test method, comprising the following steps

[0031] Step 1: Determination of pressure test conditions

[0032] When the diameter of the pressure test pipe in the pressure test pipeline is ≥ DN40, the length of the pressure test pipe meets the volume ≥ 0.3m 3 When the required test stations are ≤3, use process 1 and process 3 or process 2 and process 4; when the test pressure pipe diameter is ≥DN40, the test pressure pipe length meets the volume ≥0.3m 3When the required test stations are greater than 3, use process 1, process 2, process 3 and process 4; when the test pressure pipe diameter in the test pressure pipeline is less than DN40, or the test pressure pipe diameter is ≥ DN40 and the length meets the volume requirement of less than 0.3m 3 If the required test stations are ≤3, use process 3 or process 4; when the test pressure pipe diameter in the test pressure pipeline is <DN40, or the test pressure pipe diameter is ≥DN40 and the length meets the volume <0.3m 3 If the required test stations are greater than 3, use process 3 and process 4;

[0033] Step 2: Test process division

[0034] Process 1: When quickly filling and exhausting water before the pressure test, the external tap water enters the water tank buffer zone 3 for filtration through the low-pressure solenoid valve 2 of the water filling pipe port 1, and enters the water tank clean water area 4 after filtration, and enters the water filling pump 16 for water filling through the water outlet ball valve 7 through the first filter 9 and the pump end ball valve 13; from the outlet of the water filling pump 16 through the third one-way valve 17 and the first water inlet electric ball valve 24 to the first distributor 23, the first of the three high-pressure outlet pipelines of the first distributor 23, from the high-pressure outlet through the first gas-electrically controlled stop valve 30 and the first high-pressure solenoid valve 31 in parallel, and then passes through the first pressure test pipeline 32 and the first automatic exhaust valve 33 to enter the sewage main pipe 54 for exhaust and drainage; the second route in the first distributor 23, After passing through the pipeline of the second gas-electrically controlled stop valve 34 and the second high-pressure solenoid valve 35 in parallel from the high-pressure outlet, it enters the sewage main pipe 54 through the second pressure test pipeline 36 and the second automatic exhaust valve 37 to exhaust and drain water; the third route in the first distributor 23 enters the sewage main pipe 54 through the third pressure test pipeline 40 and the third automatic exhaust valve 41 from the high-pressure outlet through the pipeline of the third gas-electrically controlled stop valve 38 and the third high-pressure solenoid valve 39 in parallel to exhaust and drain water; three fast water injection exhaust pipelines are formed; when the exhaust is completed, the first automatic exhaust valve 33, the second automatic exhaust valve 37, and the third automatic exhaust valve 41 are closed; after the pressure test is completed, the first distributor 23 discharges water into the sewage main pipe 54 through the first sewage electric valve 15;

[0035] Process 2: When quickly filling and exhausting water before the pressure test, the external tap water enters the water tank buffer zone 3 through the water filling pipe port 1 and the low-pressure solenoid valve 2 for filtration, and then enters the water tank clean water zone 4 after filtration, and enters the water injection pump 16 through the water outlet ball valve 7 through the first filter 9 and the pump end ball valve 13 for water injection; from the outlet of the water injection pump 16, it passes through the third one-way valve 17 and the second water inlet electric ball valve 26 to enter the second distributor 29; the first of the three high-pressure outlet pipelines of the second distributor 29, from the high-pressure outlet through the fourth gas-electrically controlled stop valve 42 and the fourth high-pressure solenoid valve 43 in parallel, and then passes through the fourth pressure test pipeline 44 and the fourth automatic exhaust valve 45 to enter the sewage main pipe 54 for exhaust and drainage; the second route in the second distributor 29, After passing through the pipeline of the fifth gas electric control stop valve 46 and the fifth high-pressure solenoid valve 47 connected in parallel from the high-pressure outlet, it enters the sewage main pipe 54 through the fifth pressure test pipeline 48 and the fifth automatic exhaust valve 49 to exhaust and drain water; the third route in the second central distributor 29 enters the sewage main pipe 54 through the sixth gas electric control stop valve 50 and the sixth high-pressure solenoid valve 51 connected in parallel from the high-pressure outlet through the sixth pressure test pipeline 52 and the sixth automatic exhaust valve 53 to exhaust and drain water; three fast water injection exhaust pipelines are formed; when the exhaust is completed, the fourth automatic exhaust valve 45, the fifth automatic exhaust valve 49 and the sixth automatic exhaust valve 53 are closed; after the pressure test is completed, the second central distributor 29 discharges water into the sewage main pipe 54 through the second drainage electric valve 26;

[0036] Process three: During the pressure test, external tap water enters the water tank buffer zone 3 through the water supply pipe port 1 and the low-pressure solenoid valve 2 for filtration, enters the water tank buffer zone 4 after filtration, enters the first high-pressure pump 12 through the water outlet ball valve 7 through the second filter 10 and the electric three-way ball valve 11, and enters the first distributor 23 through the first one-way valve 14 from the outlet of the first high-pressure pump 12. The first of the three high-pressure outlet pipelines of the first distributor 23 passes through the first gas-electrically controlled stop valve 30 and the first high-pressure solenoid valve 31 in parallel from the high-pressure outlet, and then passes through the first pressure test pipeline 32 and the first automatic exhaust valve 33 to enter the sewage main pipe 54 for exhaust and drainage; The second route in the first distributor 23, after passing through the pipeline of the second gas-electrically controlled stop valve 34 and the second high-pressure solenoid valve 35 in parallel from the high-pressure outlet, passes through the second pressure test pipeline 36 and the second automatic exhaust valve 37 in sequence to enter the sewage main pipe 54 for exhaust and water discharge; the third route in the first distributor 23, after passing through the pipeline of the third gas-electrically controlled stop valve 38 and the third high-pressure solenoid valve 39 in parallel from the high-pressure outlet, passes through the third pressure test pipeline 40 and the third automatic exhaust valve 41 in sequence to enter the sewage main pipe 54 for exhaust and water discharge; three pressure test pipelines are formed; when the pressure starts to increase, the first pump end valve 8, the first automatic exhaust valve 33, the second automatic exhaust valve 37, the third The automatic exhaust valves 41 are all closed; the pressure is increased at a preset speed; when the pressure is increased to the preset test pressure value, the first gas-electrically controlled stop valve 30, the second gas-electrically controlled stop valve 34, and the third gas-electrically controlled stop valve 38 are all closed; the first pump end valve 8 is connected to the outlet pipeline of the first high-pressure pump 12, and the first pump end valve 8 releases pressure to the first high-pressure pump 12 end; the pressure relief port of the first distributor 23 is connected to the sewage main pipe 54 through the first container valve 22 and the first servo overflow valve 21 in sequence; and the pressure relief port of the first distributor 23 releases pressure to the first distributor 23 and the pipeline at a preset speed; after the pressure maintenance is completed, the first container valve 22 and the first servo overflow valve 21 are closed first, and then The first gas-electrically controlled stop valve 30, the second gas-electrically controlled stop valve 34, and the third gas-electrically controlled stop valve 38 are all opened, and the pressure relief port of the first distributor 23 is sequentially released through the first container valve 22 and the first servo relief valve 21 at a preset speed to the first distributor 23 and the first pressure test pipeline 32, the second pressure test pipeline 36, and the third pressure test pipeline 40. When the pressure value drops to the preset value, the first automatic exhaust valve 33, the second automatic exhaust valve 37, and the third automatic exhaust valve 41 are opened respectively to cooperate with the first servo relief valve 21 to complete the pressure relief of the first distributor 23 and the first pressure test pipeline 32, the second pressure test pipeline 36, and the third pressure test pipeline 40;

[0037] Process 4: During the pressure test, tap water from outside enters the water tank buffer zone 3 through the water supply pipe port 1 and the low-pressure solenoid valve 2 for filtration, enters the water tank buffer zone 4 after filtration, enters the second high-pressure pump 18 through the water outlet ball valve 7 through the second filter 10 and the electric three-way ball valve 11, and enters the second distributor 29 through the second one-way valve 20 from the outlet of the second high-pressure pump 18. The first of the three high-pressure outlet pipelines of the second distributor 29 passes through the fourth gas electric control stop valve 42 and the fourth high-pressure solenoid valve 43 in parallel from the high-pressure outlet, and then passes through the fourth pressure test pipeline 44 and the fourth automatic exhaust valve 45 to enter the sewage main pipe 54 for exhaust and drainage; the second The second route in the distributor 29, from the high-pressure outlet through the pipeline of the fifth gas electrically controlled stop valve 46 and the fifth high-pressure solenoid valve 47 connected in parallel, successively passes through the fifth pressure test pipeline 48 and the fifth automatic exhaust valve 49 to enter the sewage main pipe 54 for exhaust and water discharge; the third route in the second distributor 29, from the high-pressure outlet through the pipeline of the sixth gas electrically controlled stop valve 50 and the sixth high-pressure solenoid valve 51 connected in parallel, successively passes through the sixth pressure test pipeline 52 and the sixth automatic exhaust valve 53 to enter the sewage main pipe 54 for exhaust and water discharge; three pressure test pipelines are formed; when the pressure starts to increase, the second pump end valve 19, the fourth automatic exhaust valve 45, the fifth automatic exhaust valve 49, the sixth automatic exhaust valve 53 The dynamic exhaust valves 53 are all closed; the pressure is increased at a preset speed; when the pressure is increased to the preset test pressure value, the fourth gas electrically controlled stop valve 42, the fifth gas electrically controlled stop valve 46, and the sixth gas electrically controlled stop valve 50 are all closed; the second pump end valve 19 is connected to the outlet pipeline of the second high-pressure pump 18, and the second pump end valve 19 releases pressure to the second high-pressure pump 18 end; the pressure relief port of the second distributor 29 is connected to the sewage main pipe 54 through the second container valve 27 and the second servo overflow valve 25 in turn; the pressure relief port of the second distributor 29 releases pressure to the second distributor 29 and the pipeline in turn at a preset speed; after the pressure maintenance is completed, the second container valve 27 and the second servo overflow valve 25 are closed first, Then open all the fourth gas electrically controlled stop valve 42, the fifth gas electrically controlled stop valve 46 and the sixth gas electrically controlled stop valve 50, and release the pressure of the second distributor 29 and the fourth pressure test pipeline 44, the fifth pressure test pipeline 48 and the sixth pressure test pipeline 52 through the pressure relief port of the second distributor 29 in sequence through the second container valve 27 and the second servo relief valve 25 at a preset speed. When the pressure value drops to the preset value, open the fourth automatic exhaust valve 45, the fifth automatic exhaust valve 49 and the sixth automatic exhaust valve 53 respectively to cooperate with the second servo relief valve 25 to complete the pressure relief of the second distributor 29 and the fourth pressure test pipeline 44, the fifth pressure test pipeline 48 and the sixth pressure test pipeline 52.

[0038] In actual use, the present invention is carried out on a multi-station integrated pressure test system. The multi-station integrated pressure test system at least includes a water supply pipe 1, a low-pressure solenoid valve 2, a water tank buffer zone 3, a water tank clean water zone 4, a buffer zone sewage ball valve 5, a clean water zone sewage ball valve 6, a water outlet ball valve 7, a first pump end valve 8, a first filter 9, a second filter 10, an electric three-way ball valve 11, a first high-pressure pump 12, a pump end ball valve 13, a first check valve 14, a first sewage electric ball valve 15, a water injection pump 16, a third check valve 17, a second high-pressure pump 18, a pump end valve 2 19, a second check valve 20, a first servo overflow valve 21, a first container valve 22, a first distributor 23, a first water inlet electric ball valve 24, a second servo overflow valve 25, a second water inlet electric ball valve 26, a second container valve 27, a second sewage electric ball valve 28, a second distributor device 29, a first gas electrically controlled stop valve 30, a first high-pressure solenoid valve 31, a first pressure test pipeline 32, a first automatic exhaust valve 33, a second gas electrically controlled stop valve 34, a second high-pressure solenoid valve 35, a second pressure test pipeline 36, a second automatic exhaust valve 37, a third gas electrically controlled stop valve 38, a third high-pressure solenoid valve 39, a third pressure test pipeline 40, a third automatic exhaust valve 41, a fourth gas electrically controlled stop valve 42, a fourth high-pressure solenoid valve 43, a fourth pressure test pipeline 44, a fourth automatic exhaust valve 45, a fifth gas electrically controlled stop valve 46, a fifth high-pressure solenoid valve 47, a fifth pressure test pipeline 48, a fifth automatic exhaust valve 49, a sixth gas electrically controlled stop valve 50, a sixth high-pressure solenoid valve 51, a sixth pressure test pipeline 52, a sixth automatic exhaust valve 53 and a sewage main pipe 54.

[0039] The water filling pipe port 1 is connected with the water tank buffer zone 3 through a pipeline via a low-pressure solenoid valve 2; the water tank buffer zone 3 and the water tank clean water zone 4 are respectively connected through a pipeline via a buffer zone sewage ball valve 5 and a clean water zone sewage ball valve 6 and are connected to a sewage main manifold 54; the water tank clean water zone 4 is connected through a pipeline via a water outlet ball valve 7, and the water outlet ball valve 7 is divided into two paths through a pipeline, one of which is connected with the water injection pump 16 through a pipeline through the first filter 9 and the pump end ball valve 13, and the other is connected with a straight-through inlet of the electric three-way ball valve 11 through a pipeline through the second filter 10; another straight-through port of the electric three-way ball valve 11 is connected with the second high-pressure pump 18 through a pipeline; a bypass port of the electric three-way ball valve 11 is connected with the first high-pressure pump 12 through a pipeline; the outlet of the water injection pump 16 is divided into two paths through a pipeline after passing through a third one-way valve 17, one of which is connected with the first collector distributor 23 through the first water inlet electric ball valve 24, and the other is connected with the second collector distributor 29 through the second water inlet electric ball valve 26. The outlet of the first high-pressure pump 12 is connected to the first non-return valve 14 and the inlet of the first pump end valve 8 through a three-way pipe fitting; the outlet of the first non-return valve 14 is connected to the high-pressure inlet of the first distributor 23; the outlet of the first pump end valve 8 is connected to the sewage main pipe 54 through a pipeline; the outlet of the second high-pressure pump 18 is connected to the inlet of the second non-return valve 20 and the second pump end valve 19 through a three-way pipe fitting; the outlet of the second non-return valve 20 is connected to the high-pressure inlet of the second distributor 29; the outlet of the second pump end valve 19 is connected to the high-pressure inlet of the second distributor 29; The outlet is connected to the sewage main pipe 54 through a pipeline; the pressure relief port of the first collector and distributor 23 is connected to the sewage main pipe 54 through a pipeline through the first container valve 22; the pressure relief port of the second collector and distributor 29 is connected to the sewage main pipe 54 through a pipeline through the second container valve 27; the first collector and distributor 23 is connected to the sewage main pipe 54 through a pipeline through the first drainage electric ball valve 15; the second collector and distributor 29 is connected to the sewage main pipe 54 through a pipeline through the second drainage electric ball valve 28;

[0040] The first distributor 23 has three high-pressure outlets, one of which is divided into two ways through pipelines, one of which is connected to the inlet of the first gas-electrically controlled stop valve 30, and the other is connected to the first high-pressure solenoid valve 31. The outlet of the first gas-electrically controlled stop valve 30 and the outlet of the first high-pressure solenoid valve 31 are connected to the inlet of the first pressure test pipeline 32 through a high-pressure hose after being connected through the pipeline. The outlet of the first pressure test pipeline 32 (i.e., the highest water outlet of the pressure test pipeline) is connected to the sewage main pipe 54 through the high-pressure hose through the first automatic exhaust valve 33; the other two high-pressure outlets of the first distributor 23 in the present invention are completely the same as the supporting valves and connection forms;

[0041] The second distributor 29 has the same structural features as the first distributor 23, and its three high-pressure outlet matching valves and connection forms are also exactly the same;

[0042] The present invention includes a rapid water injection and pressure test process; process one and process two in step two are both rapid water injection and exhaust, and process three and process four are both pressure tests.

[0043] Furthermore, any one, two or three of the three rapid water injection and exhaust pipelines in the first distributor 23 in the process one can be used in combination for rapid water injection and exhaust.

[0044] Furthermore, any one, two or three of the three rapid water injection and exhaust pipelines in the second distributor 29 in the process 2 can be used in combination to perform rapid water injection and exhaust.

[0045] Furthermore, any one, any two or a combination of three of the pressure test pipelines in the first set distributor 23 in the process three are used for water injection, exhaust, pressure increase, pressure maintenance, pressure reduction and pressure relief.

[0046] Furthermore, any one, any two or a combination of three of the pressure test pipelines in the second set distributor 29 in the process four are used for water injection, exhaust, pressure increase, pressure maintenance, pressure reduction and pressure relief.

[0047] Furthermore, the first servo relief valve 21 and the second servo relief valve 25 in the process 3 and the process 4 in the step 2 are provided with a pressure test pipe with a diameter ≥ DN40 and a length satisfying a volume ≥ 0.3 m 3 When the pressure is reduced, it opens; or when the pressure test pipe diameter is less than DN40, or the pressure test pipe diameter is greater than or equal to DN40, and the length satisfies the volume less than 0.3m 3 , it is turned on both during step-up and step-down.

[0048] Furthermore, the preset pressure increase rate in the process three and the process four is 0.07-0.12MPa / min; the preset pressure relief rate in the process three and the process four is 2-3MPa / min.

[0049] Furthermore, the preset pressure increasing speed in the further step is 0.1 MPa / min.

[0050] In specific applications, the water tank buffer area 3 and the water purification area 4 must be filled with water before the water injection pump 16, the first high-pressure pump 12, and the second high-pressure pump 18 in the processes 1 to 4 are operated, and the low-pressure solenoid valve 2 is used to control the automatic water replenishment of the water tank buffer area 3 and the water purification area 4. The electric three-way ball valve 11 in processes 3 and 4 can be connected and disconnected with the first high-pressure pump 12 or the second high-pressure pump 18 alone, or can be connected and disconnected with the first high-pressure pump 12 and the second high-pressure pump 18 at the same time, so as to conveniently meet the tests with different requirements.

[0051] The pressure test in Process 3 and Process 4 includes water injection, exhaust, pressure increase, pressure maintenance and pressure relief processes.

[0052] To sum up, the present invention realizes the functions of rapid water injection, exhaust, pressure boosting, pressure maintaining, pressure relief, and drainage for multiple pressure test pipelines according to different pressure levels; at the same time, it reduces the high cost of pressure testing, reduces material waste, reduces labor intensity, improves the efficiency of pressure testing, and reduces the safety risks of welding temporary short sections to connect segmented pipelines.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0054] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0055] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0056] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0057] The above are only preferred embodiments of the present invention. The present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A multi-station integrated pressure test method, characterized in that: The following steps are included Step 1: Determination of pressure test conditions When the diameter of the pressure test pipe in the pressure test pipeline is ≥ DN40, the length of the pressure test pipe meets the volume ≥ 0.3m 3 When the required test stations are ≤3, use process 1 and process 3 or process 2 and process 4; when the test pressure pipe diameter is ≥DN40, the test pressure pipe length meets the volume ≥0.3m 3 When the required test stations are greater than 3, use process 1, process 2, process 3 and process 4; when the test pressure pipe diameter in the test pressure pipeline is less than DN40, or the test pressure pipe diameter is ≥ DN40 and the length meets the volume requirement of less than 0.3m 3 If the required test stations are ≤3, use process 3 or process 4; when the test pressure pipe diameter in the test pressure pipeline is <DN40, or the test pressure pipe diameter is ≥DN40 and the length meets the volume <0.3m 3 If the required test stations are greater than 3, use process 3 and process 4; Step 2: Test process division Process 1: When quickly filling water and exhausting air before the pressure test, the external tap water enters the water tank buffer zone (3) through the low-pressure solenoid valve (2) at the water filling pipe port (1) for filtration, and then enters the water tank clean water zone (4) after filtration, and enters the water filling pump (16) through the water outlet ball valve (7) through the first filter (9) and the pump end ball valve (13) for water filling; from the outlet of the water filling pump (16) through the third one-way valve (17) and the first water inlet electric ball valve (24) to enter the first distributor (23); the first of the three high-pressure outlet pipelines of the first distributor (23) passes from the high-pressure outlet through the pipelines of the first gas-electrically controlled stop valve (30) and the first high-pressure solenoid valve (31) connected in parallel, and then passes through the first pressure test pipeline (32) and the first automatic exhaust valve (33) to enter the sewage main pipe (54) for exhaust and drainage; the first of the three high-pressure outlet pipelines of the first distributor (23) passes through the pipelines of the first gas-electrically controlled stop valve (30) and the first high-pressure solenoid valve (31) in parallel, and then enters the sewage main pipe (54) for exhaust and drainage; The second route, from the high-pressure outlet, passes through the pipeline of the second gas-electrically controlled stop valve (34) and the second high-pressure solenoid valve (35) connected in parallel, and then passes through the second pressure test pipeline (36) and the second automatic exhaust valve (37) to enter the sewage main pipe (54) for exhaust and water discharge; the third route in the first distributor (23), from the high-pressure outlet, passes through the pipeline of the third gas-electrically controlled stop valve (38) and the third high-pressure solenoid valve (39) connected in parallel, and then passes through the third pressure test pipeline (40) and the third automatic exhaust valve (41) to enter the sewage main pipe (54) for exhaust and water discharge; three fast water injection exhaust pipelines are formed; when the exhaust is completed, the first automatic exhaust valve (33), the second automatic exhaust valve (37) and the third automatic exhaust valve (41) are closed; after the pressure test is completed, the first distributor (23) discharges water into the sewage main pipe (54) through the first sewage electric valve (15); Process 2: When quickly filling water and exhausting air before the pressure test, the external tap water enters the water tank buffer zone (3) through the water filling pipe port (1) and the low-pressure solenoid valve (2) for filtration, enters the water tank clean water zone (4) after filtration, and enters the water injection pump (16) through the water outlet ball valve (7) through the first filter (9) and the pump end ball valve (13) for water injection; from the outlet of the water injection pump (16) through the third non-return valve (17) and the second water inlet electric ball valve (26) to enter the second distributor (29); the first of the three high-pressure outlet pipelines of the second distributor (29) passes from the high-pressure outlet through the pipelines of the fourth gas-electrically controlled stop valve (42) and the fourth high-pressure solenoid valve (43) connected in parallel, and then passes through the fourth pressure test pipeline (4 4), the fourth automatic exhaust valve (45) enters the sewage main pipe (54) for exhaust and water discharge; the second route in the second distributor (29) enters the sewage main pipe (54) for exhaust and water discharge from the high-pressure outlet through the pipelines of the fifth gas-electrically-controlled stop valve (46) and the fifth high-pressure solenoid valve (47) connected in parallel, and then passes through the fifth pressure test pipeline (48) and the fifth automatic exhaust valve (49) in sequence; the third route in the second distributor (29) enters the sewage main pipe (54) for exhaust and water discharge from the high-pressure outlet through the pipelines of the sixth gas-electrically-controlled stop valve (50) and the sixth high-pressure solenoid valve (51) connected in parallel, and then passes through the sixth pressure test pipeline (52) and the sixth automatic exhaust valve (53) in sequence; three rapid water injection exhaust pipelines are formed; When the exhaust is completed, the fourth automatic exhaust valve (45), the fifth automatic exhaust valve (49), and the sixth automatic exhaust valve (53) are closed; after the pressure test is completed, the second central distributor (29) discharges the water into the sewage main pipe (54) through the second drainage electric valve (26); Process 3: During the pressure test, external tap water enters the water tank buffer zone (3) through the water supply pipe port (1) and the low-pressure solenoid valve (2) for filtration. After being filtered in the water tank buffer zone (3), it enters the water tank clean water zone (4). It enters the first high-pressure pump (12) through the water outlet ball valve (7) through the second filter (10) and the electric three-way ball valve (11). It enters the first collection and distribution device (23) from the outlet of the first high-pressure pump (12) through the first non-return valve (14). The first of the three high-pressure outlet pipelines of the first collection and distribution device (23) passes from the high-pressure outlet through the pipeline of the first gas-electrically controlled stop valve (30) and the first high-pressure solenoid valve (31) connected in parallel, and then passes through the first pressure test pipeline (32) and the first automatic exhaust valve (33) in sequence to enter the sewage main pipe (54) for exhaust. The second route in the first distributor (23) enters the sewage main pipe (54) from the high-pressure outlet through the pipeline of the second gas-electrically controlled stop valve (34) and the second high-pressure solenoid valve (35) connected in parallel, and then passes through the second pressure test pipeline (36) and the second automatic exhaust valve (37) to exhaust and drain. The third route in the first distributor (23) enters the sewage main pipe (54) from the high-pressure outlet through the pipeline of the third gas-electrically controlled stop valve (38) and the third high-pressure solenoid valve (39) connected in parallel, and then passes through the third pressure test pipeline (40) and the third automatic exhaust valve (41) to exhaust and drain. Three pressure test pipelines are formed. When the pressure is increased, the first pump end valve (8), the first automatic exhaust valve (33), the second automatic exhaust valve (37), the third The automatic exhaust valves (41) are all closed; the pressure is increased at a preset speed; when the pressure is increased to a preset test pressure value, the first gas-electrically controlled stop valve (30), the second gas-electrically controlled stop valve (34), and the third gas-electrically controlled stop valve (38) are all closed; the first pump end valve (8) is connected to the outlet pipeline of the first high-pressure pump (12), and the first pump end valve (8) releases pressure to the first high-pressure pump (12); the pressure relief port of the first distributor (23) is connected to the sewage main pipe (54) through the first container valve (22) and the first servo overflow valve (21) in sequence; and the pressure relief port of the first distributor (23) releases pressure to the first distributor (23) and the pipeline at a preset speed; after the pressure maintenance is completed, the first container valve (22) and the first servo overflow valve (21) are closed first, and then the first container valve (22) and the first servo overflow valve (21) are closed. The first gas-electrically controlled stop valve (30), the second gas-electrically controlled stop valve (34), and the third gas-electrically controlled stop valve (38) are all opened, and the pressure of the first distributor (23) and the first pressure test pipeline (32), the second pressure test pipeline (36), and the third pressure test pipeline (40) are released from the pressure relief port of the first distributor (23) in sequence through the first container valve (22) and the first servo relief valve (21) at a preset speed. When the pressure value drops to a preset value, the first automatic exhaust valve (33), the second automatic exhaust valve (37), and the third automatic exhaust valve (41) are opened respectively to cooperate with the first servo relief valve (21) to complete the pressure release of the first distributor (23) and the first pressure test pipeline (32), the second pressure test pipeline (36), and the third pressure test pipeline (40); Process 4: During the pressure test, the tap water from the outside enters the water tank buffer zone (3) through the water supply pipe port (1) and the low-pressure solenoid valve (2) for filtration. After being filtered in the water tank buffer zone (3), the water enters the water tank clean water zone (4). The water enters the second high-pressure pump (18) through the water outlet ball valve (7) through the second filter (10) and the electric three-way ball valve (11). The water enters the second distributor (29) through the outlet of the second high-pressure pump (18) through the second one-way valve (20). The first of the three high-pressure outlet pipelines of the second distributor (29) passes through the fourth gas-electrically controlled stop valve (42) and the fourth high-pressure solenoid valve (43) connected in parallel from the high-pressure outlet, and then passes through the fourth pressure test pipeline (44) and the fourth automatic exhaust valve (45) in turn to enter the sewage main pipe (54) for exhaust and drainage. The second route in the second distributor (29) passes from the high-pressure outlet through the pipeline of the fifth gas-electrically controlled stop valve (46) and the fifth high-pressure solenoid valve (47) connected in parallel, and then passes through the fifth pressure test pipeline (48) and the fifth automatic exhaust valve (49) to enter the sewage main pipe (54) for exhaust and water discharge; the third route in the second distributor (29) passes from the high-pressure outlet through the pipeline of the sixth gas-electrically controlled stop valve (50) and the sixth high-pressure solenoid valve (51) connected in parallel, and then passes through the sixth pressure test pipeline (52) and the sixth automatic exhaust valve (53) to enter the sewage main pipe (54) for exhaust and water discharge; three pressure test pipelines are formed; when the pressure is increased, the second pump end valve (19), the fourth automatic exhaust valve (45), the fifth automatic exhaust valve (49), the sixth automatic The exhaust valves (53) are all closed; the pressure is increased at a preset speed; when the pressure is increased to a preset test pressure value, the fourth gas electrically controlled stop valve (42), the fifth gas electrically controlled stop valve (46) and the sixth gas electrically controlled stop valve (50) are all closed; the second pump end valve (19) is connected to the outlet pipeline of the second high-pressure pump (18), and the second pump end valve (19) releases the pressure to the second high-pressure pump (18); the pressure relief port of the second distributor (29) is connected to the sewage main manifold (54) in sequence through the second container valve (27) and the second servo relief valve (25); the pressure relief port of the second distributor (29) releases the pressure to the second distributor (29) and the pipeline in sequence at a preset speed; after the pressure maintenance is completed, the second container valve (27) and the second servo relief valve (25) are closed first, and then the second container valve (27) and the second servo relief valve (25) are closed. The four gas electrically controlled stop valves (42), the fifth gas electrically controlled stop valve (46), and the sixth gas electrically controlled stop valve (50) are all opened, and the pressure of the second distributor (29) and the fourth pressure test pipeline (44), the fifth pressure test pipeline (48), and the sixth pressure test pipeline (52) are relieved from the pressure relief port of the second distributor (29) in sequence through the second container valve (27) and the second servo relief valve (25) at a preset speed. When the pressure value drops to a preset value, the fourth automatic exhaust valve (45), the fifth automatic exhaust valve (49), and the sixth automatic exhaust valve (53) are opened respectively to cooperate with the second servo relief valve (25) to complete the pressure relief of the second distributor (29) and the fourth pressure test pipeline (44), the fifth pressure test pipeline (48), and the sixth pressure test pipeline (52).

2. A multi-station integrated pressure testing method as claimed in claim 1, characterized in that: The three rapid water injection and exhaust pipelines in the first distributor (23) in the process 1 can be rapidly injected with water and exhausted by any one, any two or a combination of three at the same time.

3. A multi-station integrated pressure testing method as claimed in claim 1, characterized in that: The three rapid water injection and exhaust pipelines in the second distributor (29) in the process 2 can be rapidly injected with water and exhausted by any one, any two or a combination of three at the same time.

4. A multi-station integrated pressure testing method as claimed in claim 1, characterized in that: Any one, any two or a combination of three of the pressure test pipelines in the first set distributor (23) in the process three are used to perform water injection, exhaust, pressure increase, pressure maintenance, pressure reduction and pressure relief.

5. A multi-station integrated pressure testing method as claimed in claim 1, characterized in that: Any one, any two or a combination of three of the pressure test pipelines in the second set distributor (29) in the process four are used to perform water injection, exhaust, pressure increase, pressure maintenance, pressure reduction and pressure relief.

6. A multi-station integrated pressure testing method as claimed in claim 1, characterized in that: The first servo relief valve (21) and the second servo relief valve (25) in the process three and the process four in step two are provided with a pressure test pipe with a diameter of ≥ DN40 and a length satisfying a volume of ≥ 0.3 m 3 When the pressure is reduced, it opens; or when the pressure test pipe diameter is less than DN40, or the pressure test pipe diameter is greater than or equal to DN40, and the length satisfies the volume less than 0.3m 3 , it is turned on both during step-up and step-down.

7. A multi-station integrated pressure testing method as claimed in claim 1, characterized in that: The preset pressure increase rate in the process three and the process four is 0.07-0.12MPa / min; the preset pressure relief rate in the process three and the process four is 2-3MPa / min.

8. A multi-station integrated pressure testing method as claimed in claim 7, characterized in that: The preset pressure increase rate in the process three and the process four is 0.1 MPa / min.

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