A pressure monitoring and control test system with multiple stations

Abstract

The present invention belongs to the technical field of pressure test equipment for pressure-bearing equipment, and specifically relates to a pressure monitoring and control test system with multiple stations. The present invention realizes the functions of remote monitoring and control of the whole process of multiple stations, multiple processes, automatic water replenishment, automatic pressure increase, automatic pressure maintenance, automatic pressure relief, human-machine separation, and automatic generation of pressure test reports through the organic arrangement of a pressure test water tank, a water injection pump unit, a first high-pressure pump unit, a second high-pressure pump unit, a first water collection and distribution unit, a second water collection and distribution unit, a monitoring and control system, a frequency conversion control cabinet, an air compressor, an air source distributor, a pressure test unit, and a sewage main pipe. It has a high degree of automation and comprehensive functions, improves the efficiency of the pressure test of the process pipeline of the integrated device, reduces the labor intensity of operators, and reduces safety risks.

Description

Technical Field

[0001] The present invention belongs to the technical field of pressure test equipment for pressure-bearing equipment, and particularly relates to a pressure monitoring and control test system with multiple workstations. Background Art

[0002] Currently, in the manufacturing of integrated oil and gas field devices, the pressure test link of process pipelines is very important.

[0003] However, due to the complex pipeline process, diverse pipeline specifications and pressure grades, and some parts of the system, equipment, instruments, meters, valves, etc. that are not suitable for pressure testing together with the pipeline need to be isolated and pressure tested in sections according to the pressure grade, and the number of segmented pipelines is relatively large. The existing technology is to use a single pump for a single pipeline, or multiple pumps corresponding to single pipelines one by one for pressure testing, or to remove some parts of the system, equipment, instruments, meters, valves, etc. where the pressure test is restricted, weld temporary short joints to connect the segmented pipelines, and remove the connecting short joints after the pressure test is completed, and then restore the equipment, instruments, meters, valves, etc., resulting in high pressure test costs, waste of materials, high labor intensity, low pressure test efficiency, and there are some safety risks in welding temporary short joints to connect segmented pipelines.

[0004] Secondly, for the hydrostatic test, two stop valves and two pressure gauges with the same range need to be installed at the low point and the high point respectively, and the range of the pressure gauge should be 1.5 - 2 times the measured range. During the pressure test, problems such as the pressure gauge range not meeting the standard and the pressure gauge being damaged often occur; during the pressure test, multiple pressure increases and pressure holds are generally required. For process pipelines with 2.5 < P < 10 MPa, three-stage pressure increase and pressure hold are required (30% P test, 60% P test, 100% P test), and for process pipelines with P ≥ 10 MPa, three to four-stage pressure increase and pressure hold are required; if a leakage point is found, the pressure needs to be increased and held again, which further increases the frequency of pressure increase and pressure hold; during the pressure test, manual operation is adopted, which requires not only operating the start and stop of the pressure test pump, but also frequently opening and closing the pressure control valve, and observing the pressure gauge, which is prone to misoperation. Especially in the pressure test of high-pressure pipelines, there is a safety hazard of overpressure during the pressure test; if when the predetermined test pressure value is reached, the operator enters the pressure test site to check the pressure test state, if unexpected situations such as loosening of fasteners, fatigue fracture of flanges and pipe fittings occur, it will cause harm to the operator, and there is a great safety risk;

[0005] Therefore, it is necessary for us to explore and study a system that can remotely monitor and control the whole process of multi-workstation, multi-process, automatic water replenishment, automatic pressure increase, automatic pressure hold, automatic pressure relief, human-machine separation, and automatic generation of pressure test reports. Summary of the Invention

[0006] The present invention provides a pressure monitoring and control test system with multiple stations, and its purpose is to provide a system that can remotely monitor and control the entire process of multiple stations, multiple processes, automatic water replenishment, automatic pressure increase, automatic pressure maintenance, automatic pressure relief, human-machine separation, and automatic generation of pressure test reports, thereby effectively improving the efficiency of process pipeline pressure testing of integrated integrated devices and reducing the labor intensity and safety risks of operators.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A pressure monitoring and control test system with multiple stations, comprising a pressure test water tank, a water injection pump unit, a first high-pressure pump unit, a second high-pressure pump unit, a first water collecting and distributing unit, a second water collecting and distributing unit, a monitoring and control system, a frequency conversion control cabinet, an air compressor, an air source distributor, a pressure test unit and a sewage main pipe; the pressure test water tank is provided with a water inlet and a water outlet, and the water outlet is divided into two ways; one of the water outlets of the pressure test water tank is connected to the first water collecting and distributing unit and the second water collecting and distributing unit respectively through the water injection pump unit, and the other water outlet of the pressure test water tank is connected to an electric three-way ball valve, one outlet of the electric three-way ball valve is connected to the first water collecting and distributing unit through the first high-pressure pump unit, and the other outlet of the electric three-way ball valve is connected to the second water collecting and distributing unit through the second high-pressure pump unit, the first water collecting and distributing unit and the second water collecting and distributing unit are connected to the pressure test unit respectively, and the The pressure test unit, the first water collecting and distributing unit, the second water collecting and distributing unit, the first high-pressure pump unit, the second high-pressure pump unit and the pressure test water tank are respectively connected to the sewage main pipe; the monitoring and control system are respectively connected to the water injection pump unit, the first water collecting and distributing unit, the second water collecting and distributing unit, the first high-pressure pump unit, the second high-pressure pump unit, the air compressor, the pressure test unit, the electric three-way ball valve and the frequency conversion control cabinet for power-on monitoring and control; the frequency conversion control cabinet is respectively connected to the first water collecting and distributing unit, the second water collecting and distributing unit, the first high-pressure pump unit, the second high-pressure pump unit, the air compressor, the electric three-way ball valve and the monitoring and control system; the air compressor is respectively connected to the first high-pressure pump unit, the second high-pressure pump unit, the first water collecting and distributing unit and the second water collecting and distributing unit through an air source distributor to power them; the air source distributor is connected to the monitoring and control system by electrical signals.

[0009] The pressure test water tank is provided with a low-pressure electromagnetic valve, a glass tube liquid level gauge and a water level sensor. The low-pressure electromagnetic valve and the water level sensor are respectively connected to the monitoring control system through electrical signals via cables.

[0010] The pressure test water tank is provided with a buffer zone and a clean water zone. The buffer zone is arranged on the water inlet side of the pressure test water tank, and the clean water zone is arranged on the water outlet side of the pressure test water tank. The lower parts of the buffer zone and the clean water zone are respectively connected with sewage ball valves, and the buffer zone and the clean water zone are respectively connected to the sewage main pipe through the sewage ball valves.

[0011] The first high-pressure pump unit includes a first pump-end valve, a first one-way valve, a first high-pressure pump and a first pump-end pressure transmitter; the water inlet of the first high-pressure pump is connected to the electric three-way ball valve, the water outlet of the first high-pressure pump is connected to the first water collection and distribution unit through the first one-way valve, and the first pump-end pressure transmitter and the first pump-end valve are respectively arranged on the pipeline between the high-pressure pump and the first one-way valve, one end of the first pump-end valve is connected to the pipeline, and the other end of the first pump-end valve is connected to the sewage main pipe; the first pump-end valve, the first high-pressure pump and the first pump-end pressure transmitter are respectively connected to the monitoring and control system electrical signal; the first high-pressure pump is electrically connected to the frequency conversion control cabinet; the air inlet of the first pump-end valve is connected to the air compressor through the air source distributor.

[0012] The second high-pressure pump unit includes a second pump-end valve, a second pump-end pressure transmitter, a second high-pressure pump and a second one-way valve; the water inlet of the second high-pressure pump is connected to the electric three-way ball valve, and the water outlet of the second high-pressure pump is connected to the second water collection and distribution unit through the second one-way valve, and the second pump-end valve and the second pump-end pressure transmitter are respectively arranged on the pipeline between the second high-pressure pump and the second one-way valve, one end of the second pump-end valve is connected to the pipeline, and the other end of the second pump-end valve is connected to the sewage main pipe; the second pump-end valve, the second pump-end pressure transmitter and the second high-pressure pump are respectively connected to the monitoring and control system electrical signals; the air inlet of the second pump-end valve is connected to the air compressor through the air source distributor; the second high-pressure pump is electrically connected to the frequency conversion control cabinet.

[0013] The structure of the first water collecting and distributing unit is exactly the same as that of the second water collecting and distributing unit; the first water collecting and distributing unit includes a first water collecting and distributing device, a gas-electrically controlled stop valve and a high-pressure solenoid valve; the first water collecting and distributing device is provided with three high-pressure outlets, a sewage outlet, a pressure relief outlet and two water inlets, the three high-pressure outlets of the first water collecting and distributing device are respectively connected to three identical high-pressure pipelines, one high-pressure outlet of the first water collecting and distributing device is divided into two paths, one of which is connected to the gas-electrically controlled stop valve, and the other is connected to the high-pressure solenoid valve, and the two paths are connected to the pressure test unit after merging; the sewage outlet and the pressure relief outlet of the first water collecting and distributing device are respectively connected to the sewage main pipe; one water inlet of the first water collecting and distributing device is connected to the first high-pressure pump unit, and the other water inlet of the first water collecting and distributing device is connected to the water injection pump unit; the gas-electrically controlled stop valve and the high-pressure solenoid valve are respectively connected to the electrical signal of the monitoring and control system; the air inlet of the gas-electrically controlled stop valve is connected to the air compressor through the air source distributor.

[0014] The outlet end of the gas-electrically controlled stop valve is provided with a valve-end pressure transmitter; the valve-end pressure transmitter is connected to the monitoring and control system via an electrical signal.

[0015] The first water collection and distribution unit also includes a first sewage electric ball valve, a first servo overflow valve, a first container pressure transmitter, a first container valve, a first water inlet electric ball valve and a first temperature transmitter; the sewage outlet of the first water collection and distribution device is connected to the sewage main pipe through the first sewage electric ball valve, and the first container pressure transmitter is arranged on the pipeline between the sewage outlet of the first water collection and distribution device and the first sewage electric ball valve; the pressure relief port of the first water collection and distribution device is connected to the sewage main pipe through the first container valve and the first servo overflow valve in turn; the first temperature transmitter is connected to the water injection port. The pump unit is connected to the water inlet of the first manifold and the water distributor; the first water inlet electric ball valve is connected between the water inlet of the first manifold and the water injection pump unit; the first sewage discharge electric ball valve and the first water inlet electric ball valve are electrically connected to the frequency conversion control cabinet respectively; the air inlets of the first servo overflow valve and the first container valve are connected to the air compressor through the air source distributor respectively; the first sewage discharge electric ball valve, the first servo overflow valve, the first container pressure transmitter, the first container valve, the first water inlet electric ball valve and the first temperature transmitter are respectively connected to the monitoring and control system electrical signals.

[0016] The pressure test unit includes a pressure test pipeline, a high-point pressure transmitter and an automatic exhaust valve; the water inlet of the pressure test pipeline is connected to the first water collecting and distributing unit, the water outlet of the pressure test pipeline is connected to the automatic exhaust valve, the automatic exhaust valve is connected to the sewage main pipe, and a high-point pressure transmitter is connected between the pressure test pipeline and the automatic exhaust valve; the high-point pressure transmitter and the automatic exhaust valve are respectively connected to the monitoring and control system electrical signal; the air inlet of the automatic exhaust valve is connected to the air compressor through the air source distributor.

[0017] The water injection pump unit includes a third one-way valve, a water injection pump and a third pump-end pressure transmitter; the water inlet of the water injection pump is connected to the water outlet of the pressure test water tank, and the water outlet of the water injection pump is respectively connected to the first water collecting and distributing unit and the second water collecting and distributing unit through the third one-way valve; a third pump-end pressure transmitter is arranged on the pipeline between the third one-way valve and the water injection pump; the water injection pump and the third pump-end pressure transmitter are respectively connected to the electrical signals of the monitoring and control system; the water injection pump is electrically connected to the frequency conversion control cabinet.

[0018] Beneficial effects:

[0019] (1) The present invention provides three high-pressure outlets on each unit through the first water collecting and distributing unit and the second water collecting and distributing unit, and the three high-pressure outlets are respectively connected to the pressure test units, thereby realizing a multi-station, multi-process, integrated test function, realizing the separation of man and machine, and effectively improving the efficiency of pipeline pressure testing.

[0020] (2) The present invention realizes remote monitoring and control of the entire test process through the setting of a monitoring control system and multiple solenoid valves, and realizes automatic water replenishment, automatic pressure increase, automatic pressure maintenance, automatic pressure relief and automatic pressure generation, which effectively improves the degree of automation, reduces the labor intensity of operators, and reduces safety risks.

[0021] 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

[0022] 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.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] In the figure: 1- low-pressure solenoid valve; 2- pressure test water tank; 3- sewage ball valve; 4- glass tube liquid level gauge; 5- water level sensor; 6- first manifold; 7- first pump end valve; 8- first non-return valve; 9- first high-pressure pump; 10- electric three-way ball valve; 11- first pump end pressure transmitter; 12- third non-return valve; 13- water injection pump; 14- third pump end pressure transmitter; 15- second pump end valve; 16- second pump end pressure transmitter; 17- second high-pressure pump; 18- second non-return valve; 19- monitoring and control system; 20- frequency conversion control cabinet; 21- air compressor; 22- air source distributor; 23- first 1- sewage electric ball valve; 24-first servo relief valve; 25-first container pressure transmitter; 26-first container valve; 27-first water inlet electric ball valve; 28-first temperature transmitter; 29-second servo relief valve; 30-second water inlet electric ball valve; 31-second container valve; 32-second sewage electric ball valve; 33-second temperature transmitter; 34-second container pressure transmitter; 35-second manifold; 36-gas-electrically controlled stop valve; 37-valve end pressure transmitter; 38-high-pressure solenoid valve; 39-pressure test pipeline; 40-high-point pressure transmitter; 41-automatic exhaust valve; 42-sewage main pipe. DETAILED DESCRIPTION

[0025] 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.

[0026] Embodiment 1:

[0027] according to Figure 1 A pressure monitoring and control test system with multiple stations is shown, comprising a pressure test water tank 2, a water injection pump unit, a first high-pressure pump unit, a second high-pressure pump unit, a first water collecting and distributing unit, a second water collecting and distributing unit, a monitoring and control system 19, a frequency conversion control cabinet 20, an air compressor 21, an air source distributor 22, a pressure test unit and a sewage main pipe 42; the pressure test water tank 2 is provided with a water inlet and a water outlet, and the water outlet is divided into two ways; one of the water outlets of the pressure test water tank 2 is connected to the first water collecting and distributing unit and the second water collecting and distributing unit respectively through the water injection pump unit, and the other water outlet of the pressure test water tank 2 is connected to an electric three-way ball valve 10, one outlet of the electric three-way ball valve 10 is connected to the first water collecting and distributing unit through the first high-pressure pump unit, and the other outlet of the electric three-way ball valve 10 is connected to the second water collecting and distributing unit through the second high-pressure pump unit, the first water collecting and distributing unit and the second water collecting and distributing unit are connected to the pressure test unit respectively, and the pressure test The unit, the first water collecting and distributing unit, the second water collecting and distributing unit, the first high-pressure pump unit, the second high-pressure pump unit and the pressure test water tank 2 are respectively connected to the sewage main pipe 42; the monitoring and control system 19 is respectively connected to the water injection pump unit, the first water collecting and distributing unit, the second water collecting and distributing unit, the first high-pressure pump unit, the second high-pressure pump unit, the air compressor 21, the pressure test unit, the electric three-way ball valve 10 and the frequency conversion control cabinet 20 for power-on monitoring and control; the frequency conversion control cabinet 20 is respectively connected to the first water collecting and distributing unit, the second water collecting and distributing unit, the first high-pressure pump unit, the second high-pressure pump unit, the air compressor 21, the electric three-way ball valve 10 and the monitoring and control system 19; the air compressor 21 is respectively connected to the first high-pressure pump unit, the second high-pressure pump unit, the first water collecting and distributing unit and the second water collecting and distributing unit through the air source distributor 22 to power them; the air source distributor 22 is connected to the monitoring and control system 19 by electrical signals.

[0028] In actual use, the pressure test water tank 2 is filled with water through municipal tap water, and the electrical equipment such as the water injection pump unit, the first high-pressure pump unit, the second high-pressure pump unit, the electric three-way ball valve 10, the monitoring and control system 19, and the air compressor 21 are powered through the frequency conversion control cabinet 20. The monitoring and control system 19 provides input and output signal power to the pressure test water tank 2, the water injection pump unit, the first high-pressure pump unit, the second high-pressure pump unit, the electric three-way ball valve 10, the first water collecting and distributing unit, and the second water collecting and distributing unit control elements, and sends and receives signals, so as to monitor and control the control equipment and monitoring instruments; the water injection pump unit is controlled to start through the monitoring and control system 19 to inject water into the first water collecting and distributing unit and the second water collecting and distributing unit, and then exhaust the air through the pressure test unit to complete the entire rapid flushing and exhaust process; the monitoring and control system 19 controls the electric three-way ball valve 10 to start to supply water to the first high-pressure pump unit, the first water collecting and distributing unit, and the pressure test unit; or to supply water to the second high-pressure pump unit, the second water collecting and distributing unit, and the pressure test unit; or to supply water to both the first high-pressure pump unit and the second high-pressure pump unit at the same time. By starting the air compressor 21, the air source is continuously provided to the air source control solenoid valves in the first water collecting and distributing unit, the second water collecting and distributing unit, and the pressure test unit through the air source distributor 22; the control components in the first high-pressure pump unit, the second high-pressure pump unit, the first water collecting and distributing unit, and the second water collecting and distributing unit are controlled by the monitoring control system 19 to realize the pressure increase, pressure reduction and pressure relief control of the pressure test workpiece.

[0029] The present invention realizes the functions of remote monitoring and control of the whole process of multiple stations, multiple processes, automatic water replenishment, automatic pressure boosting, automatic pressure maintenance, automatic pressure relief, human-machine separation, and automatic generation of pressure test reports. It has a high degree of automation and comprehensive functions, improves the efficiency of process pipeline pressure testing of integrated integrated devices, reduces the labor intensity of operators, and reduces safety risks.

[0030] The monitoring and control system in this embodiment adopts the existing technology, which is the WYC microcomputer pressure test system provided by Sichuan Jet Machinery Co., Ltd., and the control program therein adopts the WYC42-4 microcomputer pressure test software provided by Sichuan Jet Machinery Co., Ltd. (WYC is the abbreviation of microcomputer pressure test).

[0031] Embodiment 2:

[0032] according to Figure 1 The pressure monitoring and control test system with multiple stations shown in the figure is different from the embodiment 1 in that: the pressure test water tank 2 is also connected to a low-pressure solenoid valve 1, a glass tube liquid level gauge 4 and a water level sensor 5, and the low-pressure solenoid valve 1 and the water level sensor 5 are respectively connected to the monitoring and control system 19 through cables.

[0033] In actual use, the setting of the low-pressure solenoid valve 1 realizes automatic water addition and manual water addition; the water level sensor 5 can send the water level status of the pressure test water tank 2 to the monitoring control system 19 in real time, and the monitoring control system 19 realizes remote real-time water level display, high limit and low limit alarm prompts and pump stop functions based on the transmitted information. The setting of the glass tube liquid level gauge 4 can grasp the water level status in real time on site.

[0034] Embodiment three:

[0035] according to Figure 1 The pressure monitoring and control test system with multiple stations shown in the figure is different from the embodiment 1 in that: the pressure test water tank 2 is provided with a buffer zone and a clean water zone, the buffer zone is arranged on the water inlet side of the pressure test water tank 2, and the clean water zone is arranged on the water outlet side of the pressure test water tank 2; the lower parts of the buffer zone and the clean water zone are respectively connected with sewage ball valves 3, and the buffer zone and the clean water zone are respectively connected to the sewage main pipe 42 through the sewage ball valves 3.

[0036] In actual use, the pressure test water tank 2 is provided with a buffer zone and a clean water zone, which not only ensures the quality of the test water, but also effectively reduces the probability of equipment maintenance. The sewage ball valve 3 connected to the lower part of the buffer zone and the clean water zone is in a normally closed state and is used for sewage discharge during maintenance, which effectively improves the efficiency and quality of maintenance.

[0037] Embodiment 4:

[0038] according to Figure 1 A pressure monitoring and control test system with multiple stations shown in the figure is different from the first embodiment in that: the first high-pressure pump unit comprises a first pump end valve 7, a first non-return valve 8, a first high-pressure pump 9 and a first pump end pressure transmitter 11; the water inlet of the first high-pressure pump 9 is connected to the electric three-way ball valve 10, and the water outlet of the first high-pressure pump 9 is connected to the first water collecting and distributing unit through the first non-return valve 8, and the first pump end pressure transmitter 11 and the first pump end valve 7 are respectively arranged on the pipeline between the high-pressure pump 9 and the first non-return valve 8, one end of the first pump end valve 7 is connected to the pipeline, and the other end of the first pump end valve 7 is connected to the sewage main pipe 42; the first pump end valve 7, the first high-pressure pump 9 and the first pump end pressure transmitter 11 are respectively connected to the monitoring and control system 19 by electrical signals; the first high-pressure pump 9 is electrically connected to the frequency conversion control cabinet 20; the air inlet of the first pump end valve 7 is connected to the air compressor 21 through the air source distributor 22.

[0039] Preferably, the second high-pressure pump unit includes a second pump-end valve 15, a second pump-end pressure transmitter 16, a second high-pressure pump 17 and a second one-way valve 18; the water inlet of the second high-pressure pump 17 is connected to the electric three-way ball valve 10, and the water outlet of the second high-pressure pump 17 is connected to the second water collection and distribution unit through the second one-way valve 18, and the second pump-end valve 15 and the second pump-end pressure transmitter 16 are respectively arranged on the pipeline between the second high-pressure pump 17 and the second one-way valve 18, one end of the second pump-end valve 15 is connected to the pipeline, and the other end of the second pump-end valve 15 is connected to the sewage main pipe 42; the second pump-end valve 15, the second pump-end pressure transmitter 16 and the second high-pressure pump 17 are respectively connected to the monitoring and control system 19 by electrical signals; the air inlet of the second pump-end valve 15 is connected to the air compressor 21 through the air source distributor 22; the second high-pressure pump 17 is electrically connected to the frequency conversion control cabinet 20.

[0040] In actual use, the first high-pressure pump unit and the second high-pressure pump unit pressurize the water output from the pressure test water tank 2 and inject it into the first water collecting and distributing unit and the second water collecting and distributing unit respectively, thereby ensuring the water pressure for the pressure test. The first pump end valve 7, the first high-pressure pump 9, the first pump end pressure transmitter 11, the second pump end valve 15, the second pump end pressure transmitter 16 and the second high-pressure pump 17 are respectively connected to the monitoring and control system 19 with electrical signals, so that the first pump end valve 7, the first high-pressure pump 9, the first pump end pressure transmitter 11, the second pump end valve 15, the second pump end pressure transmitter 16 and the second high-pressure pump 17 send the acquired information to the monitoring and control system 19 in real time, and the monitoring and control system 19 monitors, opens or closes the relevant components according to the acquired relevant information; the frequency conversion control cabinet 20 is respectively electrically connected to the first high-pressure pump 9 and the second high-pressure pump 17 for powering the first high-pressure pump 9 and the second high-pressure pump 17; the first pump end valve 7 and the second pump end valve 15 are connected to the air compressor 21 through the air source distributor 22, and the air compressor 21 is controlled by the monitoring and control system 19, thereby controlling the first pump end valve 7 and the second pump end valve 15.

[0041] The first high-pressure pump unit and the second high-pressure pump unit adopt the technical solution of the present invention, which not only saves manpower but also ensures the safety of the test.

[0042] Embodiment five:

[0043] according to Figure 1The pressure monitoring and control test system with multiple stations shown in the figure is different from the first embodiment in that: the structure of the first water collecting and distributing unit is exactly the same as that of the second water collecting and distributing unit; the first water collecting and distributing unit includes a first water collecting and distributing device 6, a gas-electrically controlled stop valve 36 and a high-pressure solenoid valve 38; the first water collecting and distributing device 6 is provided with three high-pressure outlets, a sewage outlet, a pressure relief outlet and two water inlets, and the three high-pressure outlets of the first water collecting and distributing device 6 are exactly the same in structure and connection mode, and one high-pressure outlet of the first water collecting and distributing device 6 is divided into two paths, one of which is It is connected to a gas-electrically controlled stop valve 36, and the other is connected to a high-pressure solenoid valve 38, and the two paths are connected to the pressure test unit after merging; the sewage outlet and the pressure relief port of the first water collector 6 are respectively connected to the sewage main pipe 42; one water inlet of the first water collector 6 is connected to the first high-pressure pump unit, and the other water inlet of the first water collector 6 is connected to the water injection pump unit; the gas-electrically controlled stop valve 36 and the high-pressure solenoid valve 38 are respectively connected to the monitoring and control system 19 with electrical signals; the air inlet of the gas-electrically controlled stop valve 36 is connected to the air compressor 21 through the air source distributor 22.

[0044] Preferably, a valve end pressure transmitter 37 is provided at the outlet end of the gas-electrically controlled stop valve 36 ; the valve end pressure transmitter 37 is connected to the monitoring and control system 19 via an electrical signal.

[0045] In actual use, the structure of the first water collecting and distributing unit is exactly the same as that of the second water collecting and distributing unit, which ensures that the present invention can perform multi-station pressure tests. The first water collecting and distributing unit controls the first high-pressure pump 9 to start through the monitoring control system 19, controls the gas-electrically controlled stop valve 36 to open, the high-pressure solenoid valve 38 to close, and the automatic exhaust valve 41 to close, and continuously increases the pressure; when the pressure rises to a specified value, the gas-electrically controlled stop valve 36 is controlled to close to maintain the pressure, and after the pressure maintenance is completed, the gas-electrically controlled stop valve 36 is opened, and the first container valve 26 and the first servo overflow valve 24 are opened to reduce the pressure, and finally the pressure is released; this scheme can effectively guarantee the pressure increase rate and pressure reduction rate of the pressure test workpiece, especially for pipelines with a volume of less than 0.3m3 and a diameter of less than 40mm.

[0046] Embodiment six:

[0047] according to Figure 1The pressure monitoring and control test system with multiple stations shown in the figure is different from the fifth embodiment in that: the first water collecting and distributing unit also includes a first sewage electric ball valve 23, a first servo overflow valve 24, a first container pressure transmitter 25, a first container valve 26, a first water inlet electric ball valve 27 and a first temperature transmitter 28; the sewage outlet of the first water collecting and distributing device 6 is connected to the sewage main pipe 42 through the first sewage electric ball valve 23, and the first container pressure transmitter 25 is arranged on the pipeline between the sewage outlet of the first water collecting and distributing device 6 and the first sewage electric ball valve 23; the pressure relief port of the first water collecting and distributing device 6 is connected to the sewage main pipe 42 through the first container valve 26 and the first servo overflow valve 24 in sequence; The first temperature transmitter 28 is connected to the water inlet of the first manifold 6 connected to the water injection pump unit; the first water inlet electric ball valve 27 is connected between the water inlet of the first manifold 6 and the water injection pump unit; the first sewage electric ball valve 23 and the first water inlet electric ball valve 27 are electrically connected to the frequency conversion control cabinet 20 respectively; the air inlets of the first servo overflow valve 24 and the first container valve 26 are respectively connected to the air compressor 21 through the air source distributor 22; the first sewage electric ball valve 23, the first servo overflow valve 24, the first container pressure transmitter 25, the first container valve 26, the first water inlet electric ball valve 27 and the first temperature transmitter 28 are respectively connected to the monitoring and control system 19 for electrical signals.

[0048] In actual use, the second water collector 35 in the second water collector unit is provided with three high-pressure outlets, a sewage outlet, a pressure relief outlet and two water inlets. The structure and connection method of the three high-pressure outlets of the second water collector 35 are exactly the same as those of the first water collector 6. The sewage outlet of the second manifold 35 is connected to the second container pressure transmitter 34, and the sewage outlet of the second manifold 35 is connected to the sewage main pipe 42 through the second sewage electric ball valve 32; the pressure relief port of the second manifold 35 is connected to the sewage main pipe 42 through the second container valve 31 and the second servo overflow valve 29 in sequence; the second temperature transmitter 33 is connected to the water inlet of the second manifold 35 connected to the water injection pump unit, and the second water inlet electric ball valve 30 is connected between the water inlet and the water injection pump unit; the second sewage electric ball valve 32 and the second water inlet electric ball valve 30 are electrically connected to the frequency conversion control cabinet 20 respectively; the air inlets of the second servo overflow valve 29 and the second container valve 31 are respectively connected to the air compressor 21 through the air source distributor 22; the second sewage electric ball valve 32, the second servo overflow valve 29, the second container pressure transmitter 34, the second container valve 31 and the second temperature transmitter 33 are respectively connected to the monitoring and control system 19 for electrical signals.

[0049] The monitoring and control system 19 sends and receives signals to the first sewage discharge electric ball valve 23, the first servo overflow valve 24, the first container pressure transmitter 25, the first container valve 26, the first water inlet electric ball valve 27, the first temperature transmitter 28, the second sewage discharge electric ball valve 32, the second servo overflow valve 29, the second container pressure transmitter 34, the second container valve 31 and the second temperature transmitter 33, thereby improving the degree of automation of the present invention, realizing the separation of man and machine, and reducing safety risks.

[0050] Embodiment seven:

[0051] according to Figure 1 A pressure monitoring and control test system with multiple stations shown in the figure is different from the embodiment 1 in that: the pressure test unit includes a pressure test pipeline 39, a high point pressure transmitter 40 and an automatic exhaust valve 41; the water inlet of the pressure test pipeline 39 is connected to the first water collecting and distributing unit, the water outlet of the pressure test pipeline 39 is connected to the automatic exhaust valve 41, the automatic exhaust valve 41 is connected to the sewage main pipe 42, and a high point pressure transmitter 40 is connected between the pressure test pipeline 39 and the automatic exhaust valve 41; the high point pressure transmitter 40 and the automatic exhaust valve 41 are respectively connected to the monitoring and control system 19 by electrical signals; the air inlet of the automatic exhaust valve 41 is connected to the air compressor 21 through the air source distributor 22.

[0052] In actual use, the high-point pressure transmitter 40 and the automatic exhaust valve 41 are respectively connected to the monitoring and control system 19 via electrical signals. The monitoring and control system 19 realizes remote monitoring and control of the pressure test unit by receiving and sending signals. The automatic exhaust valve 41 is connected to the air compressor 21 via the air source distributor 22. The monitoring and control system 19 controls the air compressor 21 to thereby realize control of the automatic exhaust valve 41.

[0053] The pressure test unit adopts the technical solution of the present invention, so that the pressure test can achieve ideal results.

[0054] Embodiment eight:

[0055] according to Figure 1 A pressure monitoring and control test system with multiple stations shown in the figure is different from the embodiment 1 in that: the water injection pump unit includes a third one-way valve 12, a water injection pump 13 and a third pump-end pressure transmitter 14; the water inlet of the water injection pump 13 is connected to the water outlet of the pressure test water tank 2, and the water outlet of the water injection pump 13 is respectively connected to the first water collecting and distributing unit and the second water collecting and distributing unit through the third one-way valve 12; a third pump-end pressure transmitter 14 is arranged on the pipeline between the third one-way valve 12 and the water injection pump 13; the water injection pump 13 and the third pump-end pressure transmitter 14 are respectively connected to the monitoring and control system 19 in terms of electrical signals; the water injection pump 13 is electrically connected to the frequency conversion control cabinet 20.

[0056] In actual use, the water injection pump unit pumps the water in the test pressure water tank 2 into the first water collecting and distributing unit and the second water collecting and distributing unit to ensure the ideal state of the test water for the pressure test; through the water injection pump 13 and the third pump end pressure transmitter 14 and the monitoring and control system 19 electrical signal connection, the test can be monitored and controlled remotely, which not only saves manpower but also ensures the safety of the test.

[0057] Embodiment nine:

[0058] A method for using a pressure monitoring and control test system with multiple stations.

[0059] 1) Start the control system of monitoring control system 19

[0060] 2) Set parameters (make sure the parameters are set correctly)

[0061] 3) Start the automatic test program, the system automatically increases pressure, maintains pressure, and releases pressure

[0062] like Figure 1 As shown: the control system of the monitoring and control system 19 has an automatic rapid water injection function. The pressure test area is divided into two parts. Each pressure test area is set with 3 stations. The test process of each station is exactly the same and the pressure can be increased at the same time. The flow of the water injection pump 13 is large, that is, when the diameter of the pressure test pipe in the pressure test pipeline 39 is ≥ DN40, and the length of the pressure test pipe meets the volume ≥ 0.3m 3 The high pressure pump 9 corresponds to the first servo relief valve 24 in the pressure test area. The diameter of the pressure test pipeline 39 is ≥ DN40 and the length meets the volume < 0.3m 3 , automatic rapid water injection and pressure test when the pressure test station is ≤3, the pressure test pipe diameter in the pressure test pipeline 39 is ≥ DN40, and the pressure test pipe length meets the volume ≥ 0.3m 3 During the pressure test, the pressure is increased by controlling the pressure increase rate according to the regulations. The pressure test area corresponding to the second high-pressure pump 17 has the same structure as the pressure test area corresponding to the first high-pressure pump 9. Six pressure test stations of the first high-pressure pump 9 and the second high-pressure pump 17 are selected and opened according to the number of test pipelines; the water injection pump 13, the first high-pressure pump 9, and the second high-pressure pump 17 of this control system are all frequency conversion controlled. When the water injection pump 13 is working, the first high-pressure pump 9 and the second high-pressure pump 17 are not working.

[0063] There are six gas-electrically controlled stop valves 36, valve-end pressure transmitters 37, high-pressure solenoid valves 38, pressure test pipelines 39, high-point pressure transmitters 40, and automatic exhaust valves 41. The first high-pressure pump 9 corresponds to three adjacent pressure test stations, including one gas-electrically controlled stop valve 36, one valve-end pressure transmitter 37, one high-pressure solenoid valve 38, pressure test pipelines 39, high-point pressure transmitters 40, and automatic exhaust valves 41 for each circuit; the second high-pressure pump 17 corresponds to three adjacent pressure test stations, including one gas-electrically controlled stop valve 36, one valve-end pressure transmitter 37, one high-pressure solenoid valve 38, pressure test pipelines 39, high-point pressure transmitters 40, and automatic exhaust valves 41 for each circuit;

[0064] Before the first high-pressure pump 9 and the second high-pressure pump 17 are automatically and quickly filled with water and pressure tested, the first drain electric ball valve 23 and the second electric ball valve 32 need to be closed.

[0065] The water level of the pressure test water tank 2 is controlled by interlocking the low-pressure solenoid valve 1 with the water level sensor 5. The water level sensor 5 has the functions of low-point alarm, low-point shutdown and high-point cut-off. The glass tube liquid level gauge 4 plays the role of on-site display. The first one-way valve 8, the second one-way valve 18, and the third one-way valve 12 are respectively arranged corresponding to the first high-pressure pump 9, the second high-pressure pump 17, and the water injection pump 13, mainly to play the role of overpressure mechanical protection for the pumps. The electric three-way ball valve 10 controls whether to supply water to the first high-pressure pump 9 or the second high-pressure pump 17 or to the first high-pressure pump 9 and the second high-pressure pump 17 at the same time. The first pump-end pressure transmitter 11, the second pump-end pressure transmitter 16, and the third pump-end pressure transmitter 14 provide pressure data signals to the control system of the monitoring control system 19, and the first high-pressure pump 9, the second high-pressure pump 17, and the water injection pump 13 are automatically controlled and interlocked for overpressure protection. By setting the first container pressure transmitter 25 , the first temperature transmitter 28, the second temperature transmitter 33, and the second container pressure transmitter 34 provide pressure and temperature data signals to the control system of the monitoring and control system 19, and perform overpressure automatic control interlocking protection on the first water collector 6 and the second water collector 35; the valve end pressure transmitter 37 is mainly used to measure the pressure at the lowest point of the pressure test pipeline 39, and the high point pressure transmitter 40 is mainly used to measure the pressure at the highest point of the pressure test pipeline 39. The valve end pressure transmitter 37 and the high point pressure transmitter 40 transmit data signals to the control system of the monitoring and control system 19; the air compressor 21 is connected to the air source distributor 22, and the air source distributor 22 provides air source for the electromagnetic valves of the first pump end valve 7, the second pump end valve 15, the first servo overflow valve 24, the second servo overflow valve 29, the first container valve 26, the second container valve 31, the gas-electrically controlled stop valve 36 (6), the automatic exhaust valve 41 (6) and other valves;

[0066] When the first high-pressure pump 9 automatically and quickly fills water at the corresponding pressure test station:

[0067] Select the water injection station on the control system interface of the monitoring and control system 19 → start the automatic fast water injection function → close the first container valve 26 → open the automatic exhaust valve 41 of the corresponding water injection station → open the gas-electrically controlled stop valve 36 and the high-pressure solenoid valve 38 of the corresponding water injection station → close the gas-electrically controlled stop valve 36 and the high-pressure solenoid valve 38 of the non-corresponding water injection station → close the first water inlet electric ball valve 27 → open the water injection pump 13 → open the water injection pressure → close the water injection pump 13 → close the automatic exhaust valve 41 of the corresponding water injection station → close the high-pressure solenoid valve 38 of the corresponding water injection station → close the first water inlet electric ball valve 27 → end the fast water injection.

[0068] When the second high-pressure pump 17 automatically and quickly injects water into the corresponding pressure test station:

[0069] Select the water injection station on the control system interface of the monitoring and control system 19 → start the automatic fast water injection function → close the second container valve 31 → open the automatic exhaust valve 41 of the corresponding water injection station → open the gas-electrically controlled stop valve 36 and the high-pressure solenoid valve 38 of the corresponding water injection station → close the gas-electrically controlled stop valve 36 and the high-pressure solenoid valve 38 of the non-corresponding water injection station → close the second water inlet electric ball valve 30 → open the water injection pump 13 → open the water injection pressure → close the water injection pump 13 → close the automatic exhaust valve 41 of the corresponding water injection station → close the high-pressure solenoid valve 38 of the corresponding water injection station → close the second water inlet electric ball valve 30 → end the fast water injection.

[0070] The first high-pressure pump 9 corresponds to the pressure test station pressure test process (water injection completed state):

[0071] Select the pressure test station → both the gas-electrically controlled stop valve 36 and the high-pressure solenoid valve 38 of the non-pressure test station are closed → the first high-pressure pump 9 is started at a low frequency → the first pump end valve 7 is closed → the workpiece pressure increases:

[0072] When the pressure increase rate of the workpiece is within 0.1MPa / min: the workpiece is pressurized to the target pressure → the first pump end valve 7 is opened → the corresponding pressure test station gas-electrically controlled stop valve 36 is closed → the first high-pressure pump 9 is stopped → the workpiece starts to maintain pressure → the pressure maintenance ends (if the pressure needs to be continued: the first high-pressure pump 9 is started at a low frequency → the corresponding pressure test station gas-electrically controlled stop valve 36 is opened → the first pump end valve 7 is closed → the workpiece continues to be pressurized → reaches the target pressure → the corresponding pressure test station gas-electrically controlled stop valve 36 is closed → the first pump end valve 7 is opened → the first high-pressure pump 9 is stopped → the workpiece starts to maintain pressure) → the corresponding pressure test station gas-electrically controlled stop valve 36 is opened Start → the first servo overflow valve 24 opens to the minimum → the first container valve 26 opens → the workpiece begins to reduce pressure (the pressure reduction rate is too fast: the first high-pressure pump 9 starts at a low frequency → the first pump end valve 7 closes → the workpiece slowly reduces pressure → reduces pressure to the target pressure → maintains pressure → the first high-pressure pump 9 stops) → the workpiece pressure slowly drops to the target pressure → closes the corresponding pressure test station gas-electrically controlled stop valve 36 → starts to maintain pressure → the pressure maintenance time ends → opens the corresponding pressure test station gas-electrically controlled stop valve 36 → the first servo overflow valve 24 opens more → the workpiece is depressurized to normal pressure (the corresponding pressure test station automatic exhaust valve 41 opens) → the pressure test ends.

[0073] When the pressure increase rate exceeds 0.1MPa / min: the first container valve 26 opens → the opening of the first servo relief valve 24 increases → the workpiece is pressurized to the target pressure within the standard pressure increase rate range → the corresponding pressure test station gas-electrically controlled stop valve 36 is closed → the first pump end valve 7 opens → the first high-pressure pump 9 stops → the workpiece starts to maintain pressure → the pressure maintenance ends (if the pressure needs to continue to increase: the first high-pressure pump 9 starts at a low frequency → the first pump end valve 7 is closed → the frequency of the first high-pressure pump 9 increases → the pressure of the first container pressure transmitter 25 on the first manifold 6 reaches the workpiece pressure → the corresponding pressure test station gas-electrically controlled stop valve 36 is opened → the frequency of the first high-pressure pump 9 increases → the workpiece continues to be pressurized at the standard rate → reaches the target pressure → the first high-pressure pump 9 reduces the frequency → the corresponding pressure test station gas-electrically controlled stop valve 36 is closed → the first pump end valve 7 opens Start → first high-pressure pump 9 stops → workpiece starts to maintain pressure) → first container valve 26 closes → first servo overflow valve 24 opens to the minimum → first container valve 26 opens → first high-pressure pump 9 starts at low frequency → first pump end valve 7 closes → the detection pressure of the first container pressure transmitter 25 on the first manifold 6 reaches the workpiece pressure → the corresponding pressure test station air-electrically controlled stop valve 36 opens → the opening of the first servo overflow valve 24 increases → the workpiece pressure slowly drops to the target pressure → close the corresponding pressure test station air-electrically controlled stop valve 36 → the workpiece starts to maintain pressure → first pump end valve 7 opens → first high-pressure pump 9 stops → pressure maintenance ends → open the corresponding pressure test station air-electrically controlled stop valve 36 → the opening of the first servo overflow valve 24 increases → the workpiece is depressurized to normal pressure (the corresponding pressure test station automatic exhaust valve 41 opens) → pressure test ends.

[0074] The second high-pressure pump 17 corresponds to the pressure test station pressure test process (water injection completed state):

[0075] Select the pressure test station → the non-pressure test station gas-electrically controlled stop valve 36 and the high-pressure solenoid valve 38 are closed → the second high-pressure pump 17 is started at a low frequency → the second pump end valve 15 is closed → the workpiece pressure increases:

[0076] When the pressure increase rate of the workpiece is within 0.1MPa / min: the workpiece is pressurized to the target pressure → the second pump end valve 15 is opened → the corresponding pressure test station gas-electrically controlled stop valve 36 is closed → the second high-pressure pump 17 is stopped → the workpiece starts to maintain pressure → the pressure maintenance ends (if the pressure needs to be continued: the second high-pressure pump 17 is started at a low frequency → the corresponding pressure test station gas-electrically controlled stop valve 36 is opened → the second pump end valve 15 is closed → the workpiece continues to be pressurized → the target pressure is reached → the corresponding pressure test station gas-electrically controlled stop valve 36 is closed → the second pump end valve 15 is opened → the second high-pressure pump 17 is stopped → the workpiece starts to maintain pressure) 6 opens → the second servo overflow valve 29 opens to the minimum → the second container valve 31 opens → the workpiece starts to reduce the pressure (the pressure reduction rate is too fast: the second high-pressure pump 17 starts at a low frequency → the second pump end valve 15 closes → the workpiece slowly reduces the pressure → reduces the pressure to the target pressure → maintains the pressure → the second high-pressure pump 17 stops) → the workpiece pressure slowly drops to the target pressure → closes the corresponding pressure test station gas-electrically controlled stop valve 36 → starts to maintain the pressure → the pressure maintenance time ends → opens the corresponding pressure test station gas-electrically controlled stop valve 36 → the second servo overflow valve 29 opens more → the workpiece is depressurized to normal pressure (the corresponding pressure test station automatic exhaust valve 41 opens) → the pressure test ends.

[0077] When the pressure increase rate exceeds 0.1MPa / min: the second container valve 31 opens → the second servo overflow valve 29 increases in opening → the workpiece is pressurized to the target pressure within the pressure increase rate range specified in the standard → the corresponding pressure test station gas-electrically controlled stop valve 36 is closed → the second pump end valve 15 opens → the second high-pressure pump 17 stops → the workpiece starts to maintain pressure → the pressure maintenance ends (if the pressure needs to be continued: the second high-pressure pump 17 starts at a low frequency → the second pump end valve 15 is closed → the frequency of the second high-pressure pump 17 increases → the pressure of the second container pressure transmitter 34 on the second manifold 35 reaches the pressure of the workpiece → the corresponding pressure test station gas-electrically controlled stop valve 36 is opened → the frequency of the second high-pressure pump 17 increases → the workpiece continues to be pressurized at the rate specified in the standard → the target pressure is reached → the second high-pressure pump 17 reduces the frequency → the corresponding pressure test station gas-electrically controlled stop valve 36 is closed → the second pump end valve 1 5 starts → the second high-pressure pump 17 stops → the workpiece starts to maintain pressure) → the second container valve 31 closes → the second servo relief valve 29 opens to the minimum → the second container valve 31 opens → the second high-pressure pump 17 starts at a low frequency → the second pump end valve 15 closes → the detection pressure of the second container pressure transmitter 34 on the second manifold 35 reaches the workpiece pressure → the corresponding pressure test station gas-electrically controlled stop valve 36 opens → the opening of the second servo relief valve 29 increases → the workpiece pressure slowly drops to the target pressure → close the corresponding pressure test station gas-electrically controlled stop valve 36 → the workpiece starts to maintain pressure → the second pump end valve 15 opens → the second high-pressure pump 17 stops → the pressure maintenance ends → open the corresponding pressure test station gas-electrically controlled stop valve 36 → the second servo relief valve 29 increases → the workpiece is depressurized to normal pressure (the corresponding pressure test station automatic exhaust valve 41 opens) → the pressure test ends.

[0078] The control system of the monitoring control system 19 can control the first high-pressure pump 9 and the second high-pressure pump 17 to respectively correspond to the pressure test stations to perform rapid flushing or pressure testing simultaneously, or one or more of them can be selected to work.

[0079] 4) Save records and generate curves and tables.

[0080] 5) Print records.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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 pressure monitoring and control test system with multiple stations, characterized in that: The invention comprises a pressure test water tank (2), a water injection pump unit, a first high-pressure pump unit, a second high-pressure pump unit, a first water collecting and distributing unit, a second water collecting and distributing unit, a monitoring and control system (19), a frequency conversion control cabinet (20), an air compressor (21), an air source distributor (22), a pressure test unit and a sewage main pipe (42); the pressure test water tank (2) is provided with a water inlet and a water outlet, and the water outlet is divided into two paths; one of the water outlets of the pressure test water tank (2) is connected to the first water collecting and distributing unit and the second water collecting and distributing unit respectively through the water injection pump unit, and the other water outlet of the pressure test water tank (2) is connected to an electric three-way ball valve (10), one outlet of the electric three-way ball valve (10) is connected to the first water collecting and distributing unit through the first high-pressure pump unit, and the other outlet of the electric three-way ball valve (10) is connected to the second water collecting and distributing unit through the second high-pressure pump unit, the first water collecting and distributing unit and the second water collecting and distributing unit are respectively connected to the pressure test unit, and the pressure test unit, the first water collecting and distributing unit, and the second water collecting and distributing unit are respectively connected to the pressure test unit. The water collecting and distributing unit, the first high-pressure pump unit, the second high-pressure pump unit and the pressure test water tank (2) are respectively connected to the sewage main pipe (42); the monitoring and control system (19) is respectively connected to the water injection pump unit, the first water collecting and distributing unit, the second water collecting and distributing unit, the first high-pressure pump unit, the second high-pressure pump unit, the air compressor (21), the pressure test unit, the electric three-way ball valve (10) and the frequency conversion control cabinet (20) for power-on monitoring and control; the frequency conversion control cabinet (20) is respectively connected to the first water collecting and distributing unit, the second water collecting and distributing unit, the first high-pressure pump unit, the second high-pressure pump unit, the air compressor (21), the electric three-way ball valve (10) and the monitoring and control system (19); the air compressor (21) is respectively connected to the first high-pressure pump unit, the second high-pressure pump unit, the first water collecting and distributing unit and the second water collecting and distributing unit through the air source distributor (22) to supply power to them; the air source distributor (22) is connected to the monitoring and control system (19) by electrical signals; The structure of the first water collecting and distributing unit is completely the same as that of the second water collecting and distributing unit; the first water collecting and distributing unit comprises a first water collecting and distributing device (6), a gas-electrically controlled stop valve (36) and a high-pressure solenoid valve (38); the first water collecting and distributing device (6) is provided with three high-pressure outlets, a sewage outlet, a pressure relief outlet and two water inlets; the three high-pressure outlets of the first water collecting and distributing device (6) are respectively connected to three identical high-pressure pipelines; one high-pressure outlet of the first water collecting and distributing device (6) is divided into two paths, one of which is connected to the gas-electrically controlled stop valve (36) and the other is connected to the high-pressure solenoid valve (38). The electromagnetic valve (38) is connected to the pressure test unit after the two paths meet; the sewage outlet and the pressure relief outlet of the first water collector (6) are respectively connected to the sewage main pipe (42); one water inlet of the first water collector (6) is connected to the first high-pressure pump unit, and the other water inlet of the first water collector (6) is connected to the water injection pump unit; the gas-electrically controlled stop valve (36) and the high-pressure electromagnetic valve (38) are respectively connected to the monitoring and control system (19) by electrical signals; the air inlet of the gas-electrically controlled stop valve (36) is connected to the air compressor (21) through the air source distributor (22); The pressure test unit comprises a pressure test pipeline (39), a high point pressure transmitter (40) and an automatic exhaust valve (41); the water inlet of the pressure test pipeline (39) is connected to the first water collecting and distributing unit, the water outlet of the pressure test pipeline (39) is connected to the automatic exhaust valve (41), the automatic exhaust valve (41) is connected to the sewage main pipe (42), and a high point pressure transmitter (40) is connected between the pressure test pipeline (39) and the automatic exhaust valve (41); the high point pressure transmitter (40) and the automatic exhaust valve (41) are respectively connected to the monitoring control system (19) via electrical signals; the air inlet of the automatic exhaust valve (41) is connected to the air compressor (21) via the air source distributor (22).

2. A multi-station pressure monitoring and control test system as claimed in claim 1, characterized in that: The pressure test water tank (2) is provided with a low-pressure solenoid valve (1), a glass tube liquid level gauge (4) and a water level sensor (5). The low-pressure solenoid valve (1) and the water level sensor (5) are respectively connected to the monitoring control system (19) via electrical cables.

3. A multi-station pressure monitoring and control test system as claimed in claim 1 or 2, characterized in that: The pressure test water tank (2) is provided with a buffer zone and a clean water zone, the buffer zone is provided on the water inlet side of the pressure test water tank (2), and the clean water zone is provided on the water outlet side of the pressure test water tank (2); the lower parts of the buffer zone and the clean water zone are respectively connected to sewage ball valves (3), and the buffer zone and the clean water zone are respectively connected to the sewage main pipe (42) through the sewage ball valves (3).

4. A multi-station pressure monitoring and control test system as claimed in claim 1, characterized in that: The first high-pressure pump unit comprises a first pump-end valve (7), a first non-return valve (8), a first high-pressure pump (9) and a first pump-end pressure transmitter (11); the water inlet of the first high-pressure pump (9) is connected to the electric three-way ball valve (10), the water outlet of the first high-pressure pump (9) is connected to the first water collection and distribution unit through the first non-return valve (8), the first pump-end pressure transmitter (11) and the first pump-end valve (7) are respectively arranged on the pipeline between the high-pressure pump (9) and the first non-return valve (8), one end of the first pump-end valve (7) is connected to the pipeline, and the other end of the first pump-end valve (7) is connected to the sewage main pipe (42); the first pump-end valve (7), the first high-pressure pump (9) and the first pump-end pressure transmitter (11) are respectively connected to the monitoring and control system (19) for electrical signals; the first high-pressure pump (9) is electrically connected to the frequency conversion control cabinet (20); the air inlet of the first pump-end valve (7) is connected to the air compressor (21) through the air source distributor (22).

5. A multi-station pressure monitoring and control test system as claimed in claim 1, characterized in that: The second high-pressure pump unit comprises a second pump-end valve (15), a second pump-end pressure transmitter (16), a second high-pressure pump (17) and a second one-way valve (18); the water inlet of the second high-pressure pump (17) is connected to the electric three-way ball valve (10), the water outlet of the second high-pressure pump (17) is connected to the second water collection and distribution unit via the second one-way valve (18), and the second pump-end valve (15) and the second pump-end pressure transmitter are respectively arranged on the pipeline between the second high-pressure pump (17) and the second one-way valve (18). (16), one end of the second pump-end valve (15) is connected to the pipeline, and the other end of the second pump-end valve (15) is connected to the sewage main pipe (42); the second pump-end valve (15), the second pump-end pressure transmitter (16) and the second high-pressure pump (17) are respectively connected to the monitoring and control system (19) for electrical signals; the air inlet of the second pump-end valve (15) is connected to the air compressor (21) through the air source distributor (22); and the second high-pressure pump (17) is electrically connected to the frequency conversion control cabinet (20).

6. A multi-station pressure monitoring and control test system as claimed in claim 1, characterized in that: The outlet end of the gas-electrically controlled stop valve (36) is provided with a valve-end pressure transmitter (37); the valve-end pressure transmitter (37) is electrically connected to the monitoring and control system (19).

7. A multi-station pressure monitoring and control test system as claimed in claim 1, characterized in that: The first water collection and distribution unit further comprises a first sewage discharge electric ball valve (23), a first servo overflow valve (24), a first container pressure transmitter (25), a first container valve (26), a first water inlet electric ball valve (27) and a first temperature transmitter (28); the sewage discharge port of the first water collection and distribution device (6) is connected to the sewage discharge main pipe (42) through the first sewage discharge electric ball valve (23); the first container pressure transmitter (25) is arranged on the pipeline between the sewage discharge port of the first water collection and distribution device (6) and the first sewage discharge electric ball valve (23); the pressure relief port of the first water collection and distribution device (6) is connected to the sewage discharge main pipe (42) through the first container valve (26) and the first servo overflow valve (24) in sequence; the first temperature transmitter (28) is connected to the water injection pump The first water inlet electric ball valve (27) is connected to the water inlet of the first water collector (6) and the water injection pump unit; the first sewage discharge electric ball valve (23) and the first water inlet electric ball valve (27) are respectively electrically connected to the frequency conversion control cabinet (20); the air inlets of the first servo overflow valve (24) and the first container valve (26) are respectively connected to the air compressor (21) through the air source distributor (22); the first sewage discharge electric ball valve (23), the first servo overflow valve (24), the first container pressure transmitter (25), the first container valve (26), the first water inlet electric ball valve (27) and the first temperature transmitter (28) are respectively connected to the monitoring and control system (19) for electrical signals.

8. A multi-station pressure monitoring and control test system as claimed in claim 1, characterized in that: The water injection pump unit comprises a third one-way valve (12), a water injection pump (13) and a third pump-end pressure transmitter (14); the water inlet of the water injection pump (13) is connected to the water outlet of the pressure test water tank (2), and the water outlet of the water injection pump (13) is respectively connected to the first water collecting and distributing unit and the second water collecting and distributing unit through the third one-way valve (12); a third pump-end pressure transmitter (14) is provided on the pipeline between the third one-way valve (12) and the water injection pump (13); the water injection pump (13) and the third pump-end pressure transmitter (14) are respectively connected to the monitoring and control system (19) in terms of electrical signals; and the water injection pump (13) is electrically connected to the frequency conversion control cabinet (20).

Images