CN107146645B

CN107146645B - Nuclear power plant's containment spraying system sprays performance test device

Info

Publication number: CN107146645B
Application number: CN201710488677.8A
Authority: CN
Inventors: 张大林; 边嘉伟; 巫英伟; 苏光辉; 田文喜; 秋穗正
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2017-06-23
Filing date: 2017-06-23
Publication date: 2023-04-11
Anticipated expiration: 2037-06-23
Also published as: CN107146645A

Abstract

The invention discloses a nuclear power plant containment spraying system spraying performance test device which comprises a spraying water pool, a water collecting pit, a water supply pump, a regulating valve, a ball valve, a Y-shaped filter, a bypass branch, a flowmeter, a pressure transmitter, a spacing-angle regulating mechanism and a nozzle, wherein the spraying water pool is arranged in the water collecting pit; a spraying water tank in the device provides a basic space for a spraying test, a water collecting pit in the spraying water tank stores spraying water, the spraying water is recycled in the system, enters a water supply pump through a water suction port filter and is conveyed to a nozzle through a pipeline, and a flowmeter, a spacing-angle adjusting mechanism and a pressure transmitter are arranged along the pipeline; the device is provided with 4 spraying test pipelines which can be respectively and independently opened, and the outlet angle of a nozzle can be respectively adjusted by each pipeline; the device can realize the test of a single nozzle under different spray angles and the coherent test of 2 adjacent nozzles under different spray angles with different intervals by the interval-angle adjusting mechanism, and solves the test requirement of a multi-nozzle multi-angle large-scale spray field.

Description

Nuclear power plant's containment spraying system sprays performance test device

Technical Field

The invention relates to the field of nozzle performance test evaluation, belongs to technical equipment for testing and measuring spraying characteristics of coherent spray fields with different flow rates and large coverage areas against the application background of large spray fields, multiple nozzles, multiple angles and variable intervals, and particularly relates to a nuclear power plant containment spraying system spraying performance test device.

Background

The containment vessel spraying system is an important special safety facility in a nuclear power plant, and the system ensures that the containment vessel containing the radioactive fission product is not over-pressurized under the accident condition and maintains the integrity of the pressure boundary. Because the working capacity of a single nozzle is limited, the nozzle arrangement of the containment vessel spraying system is arranged through a spraying ring pipe to realize the spraying coverage of the inner space. Different nozzles have different arrangement angles, arrange the interval, can appear the coherent phenomenon of different degrees between the adjacent nozzle, and the test measurement of single nozzle can't deal with the influence of coherent phenomenon, need carry out to the test to coherent phenomenon, knows different coherent situations and just can make accurate aassessment to the influence of spraying the effect to the whole effect that sprays. Due to the large size of the containment vessel spray system, no applicable patent or equipment is disclosed at present.

Patent CN201610908769 introduces a containment vessel spray test device and method, which comprises a containment vessel simulation body, a spray system for spraying cooling water into the containment vessel simulation body, a water storage tank for providing cooling water for the spray system, and a gas supply system for simulating the internal state of the containment vessel to provide a gas source for the containment vessel simulation body; the spraying system is connected between the containment simulation body and the water storage tank, and the gas supply system is connected with the containment simulation body; and the containment simulation body is provided with a temperature measuring point and a pressure measuring point which are used for respectively measuring the internal temperature and the internal pressure. The invention mainly aims at the cooling and pressure reducing performance of the system, is macroscopic, does not research the interference phenomenon of adjacent nozzles and the specific indexes of spraying and atomizing, and does not provide the specific structure of the device.

Patent CN201020190365 introduces a spraying performance comprehensive test bed, which comprises a main frame, an adjustable spray head mounting frame, a mist collection groove, a liquid receiving groove, a curtain, an ultrasonic spraying distribution uniformity testing system, a liquid medicine circulating system, a liquid pump testing system, a computer vision system, a control system and the like, and is used for testing the performance of spraying parts (suction pipes, connectors and spray heads) and pressurizing parts (barrels and pumps) of agricultural plant protection machinery. The patent does not aim at the multi-nozzle multi-angle spray coherence phenomenon, and cannot be applied to a large open type spray field similar to containment spray.

Patent CN201120528754.6 describes a test bed device for testing nozzle performance. The 2-dimensional guide rail design is adopted, the measurement is mainly carried out aiming at the fog quantity distribution index of the nozzle, and the measurement of other atomization indexes such as the atomization granularity is not given. Nor does it address the coherence issues of multiple nozzles.

Patent 201610297315.6 discloses a nuclear power plant spent fuel pool sprays cooling system's performance test device, and the device sprays to nuclear power plant spent fuel pool and designs, and the spent fuel pool sprays for the unilateral sprays, and the nozzle arrangement position all sprays differently with the containment in the same one side of coverage area. Although the patent designs variable offset angle and interval, its offset angle orientation all is in the same side of vertical plane, is difficult to carry out vertical decurrent spray test, if carry out the opposite side and spray, the spray field can cover on the test support, can't carry out the test and measure.

In practical test and production practices, the diameter of a spraying coverage range of the containment spray head of the nuclear power plant can reach five meters or more, and the existing device and method have certain defects. The installation arrangement of the containment spray head of the nuclear power plant in the containment has various offset angles, so that the difference from the performance test of the traditional spray head is large, the coverage ranges of the same spray head at different angles have quite large difference due to different offset angles, and the spray performance test device of the containment spray system of the nuclear power plant is designed according to actual requirements.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a nuclear power plant containment vessel spraying system spraying performance test device which can be used for a nuclear power plant containment vessel spraying system spraying performance test.

The invention adopts the following technical scheme:

a nuclear power plant containment spraying system spraying performance test device comprises a branch regulating valve 1 No. 1, a ball valve 2 No. 1, a bypass regulating valve 3, a bypass branch 4, a branch regulating valve 2 No. 2, a water supply pump 6, a lateral pipeline interval-angle regulating mechanism 7, a lateral nozzle 8, a lateral pipeline pressure transmitter 9, a ball valve 3 No. 10, an inlet filter 11, a sump 12, a middle pipeline pressure transmitter 13, a middle pipeline interval-angle regulating mechanism 14, a middle nozzle 15, a ball valve 4 16, a spraying water tank 17 and a ball valve 2 18; the spraying performance test device is based on a rectangular spraying water tank 17, the south-north direction is a short side, and the east-west direction is a long side; the spraying performance test device is provided with four spraying pipelines which are respectively a south side No. 1 spraying pipeline, a south side No. 2 spraying pipeline, a north side No. 1 spraying pipeline and a north side No. 2 spraying pipeline, wherein the south side No. 1 spraying pipeline and the north side No. 1 spraying pipeline are positioned above a fence at the west side of the spraying water pool 17, the south side No. 2 spraying pipeline and the north side No. 2 spraying pipeline are positioned above the center of the spraying water pool 17, and the south side No. 1 spraying pipeline is structurally symmetrical with the north side No. 1 spraying pipeline, and the south side No. 2 spraying pipeline and the north side No. 2 spraying pipeline are symmetrical along the central axis of the spraying water pool 17 in the length direction; a square sump 12 is arranged at the northwest corner of the water tank fence, a water supply pump 6 is arranged in a pump pit at the outer side of the water tank beside the sump 12, an inlet filter 11 is reserved at the bottom of the sump 12, the inlet filter 11 is connected with the water supply pump 6 through a water supply pipeline, water in the sump 12 is sucked into the water supply pump 6 through the inlet filter 11, an outlet of the water supply pump 6 is connected with a Y-shaped filter through a pipeline, then a pipeline is arranged at the outer side of a spraying water tank 17, a four-way pipe is connected at the middle point of the short side of the spraying water tank 17 and is divided into three pipelines, the first pipeline is a four-way pipe, the middle direction of the four-way pipe is connected with a bypass adjusting valve 3 and a bypass branch 4, and the bypass branch is communicated with the sump 12 by adhering to the inner wall surface of the water tank; the second path supplies water for the No. 1 spraying pipeline on the south side and the No. 2 spraying pipeline on the south side of the four-way pipe, and the third path supplies water for the No. 1 spraying pipeline on the north side and the No. 2 spraying pipeline on the north side of the four-way pipe; for a south side No. 1 spraying pipeline and a south side No. 2 spraying pipeline, a pipeline is connected to the south side from a four-way joint along the top end of a pool fence, a flowmeter is arranged at the position of a pipe diameter which is 20 times of the interval, a No. 1

branch adjusting valve

1,1 branch adjusting valve 1 is arranged at the position 15 times of the pipe diameter at the downstream of the flowmeter to control the flow of the south side No. 1 spraying pipeline and the south side No. 2 spraying pipeline, a three-way joint is arranged at the downstream of the No. 1 branch adjusting valve 1 and is divided into two paths which are respectively connected with the south side No. 1 spraying pipeline and the south side No. 2 spraying pipeline, one path is vertically led out upwards, a straight pipe section is arranged after a No. 1

ball valve

2,1 ball valve 2 is arranged at the position 10 times of the pipe diameter of the joint, a 90-degree elbow is connected to the position 5.5 meters away from the ground height, the straight pipe section bends towards the north, a lateral pipeline spacing-angle adjusting mechanism 7 is arranged at the position 10 times of the elbow, a lateral pipeline pressure transmitter 9 and a lateral nozzle 8 are arranged at the downstream, and the lateral nozzle 8 are arranged, and the south side spraying pipeline, so that the south side No. 1 spraying pipeline is formed; leading out another pipeline at a downstream three-way joint of the No. 1 branch regulating valve 1, arranging along the top end of a pool fence, connecting a 90-degree upward elbow at the middle point of the long side of the pool, installing a No. 2

ball valve

18,2 ball valve 18 at a position 10 times of pipe diameter away from the joint, arranging a straight pipe section, connecting a 90-degree elbow at a position 5.5 meters away from the ground, bending to the north, installing a middle pipeline interval-angle regulating mechanism 14 at a position 10 times of pipe diameter away from the elbow, installing a middle pipeline pressure transmitter 13 and a middle nozzle 15 at the downstream, and forming a No. 2 spraying pipeline on the south side; for the No. 1 north spray pipeline and the No. 2 north spray pipeline, the four-way joint is connected with a pipeline to the north along the top end of the pool fence, and the pipelines are respectively and symmetrically arranged with the No. 1 south spray pipeline and the No. 2 south spray pipeline to form the No. 1 north spray pipeline and the No. 2 north spray pipeline; each path of spraying pipeline respectively and independently adjusts the arrangement angle and the relative position of the nozzles through the lateral pipeline spacing-angle adjusting mechanism 7 and the middle pipeline spacing-angle adjusting mechanism 14, and each path of spraying pipeline respectively opens through the

ball valves

2, 18, 10 and 16 corresponding to each pipeline.

The lateral pipeline spacing-angle adjusting mechanism 7 and the middle pipeline spacing-angle adjusting mechanism 14 have two selection forms, wherein the first selection form comprises two pairs of loop flanges 19 and a section of replaceable pipe section 22 positioned between the two pairs of loop flanges 19, the nozzle spacing adjustment is realized by replacing the replaceable pipe sections 22 with different lengths, the offset angle adjustment is realized by rotating the loop flanges 19, and the spiral-flow type nozzle is suitable for a spiral-flow type nozzle of which the nozzle outlet direction and the fluid inlet form an angle of 90 degrees; the second selection form is composed of 3

movable joints

20 and 3 bent pipe sections 21, the adjustment of the distance and the offset angle is realized through the matching of the 3 movable joints 20, and the second selection form is suitable for the nozzle with the nozzle outlet direction and the fluid inlet direction in the same direction.

Simultaneously starting the south side No. 1 spray pipeline and the north side No. 1 spray pipeline which are in opposite positions, or starting the south side No. 2 spray pipeline and the north side No. 2 spray pipeline to carry out an adjacent nozzle interference effect test; the south spray pipeline No. 2 and the north spray pipeline No. 2 which are positioned above the middle part of the spray water pool 17 perform vertical downward spray and lateral spray interference or spray interference of two nozzles with small offset angles; the south side No. 1 spray pipeline and the north side No. 1 spray pipeline which are positioned above the west side fence of the water pool perform spray interference of the large-offset-angle nozzles, and the field space is fully utilized.

The suspended part of the spraying pipeline is hoisted and fixed at the upper part, and no interference structure is arranged below and on the side of the nozzle.

The nuclear power plant containment spraying system spraying performance test device can be used for testing spraying performance indexes including pressure drop characteristics, atomizing cone angles and atomizing granularity, wherein the pressure drop characteristics are measured through a device instrument, the atomizing cone angles can be measured by adopting an image method, and the atomizing granularity can be measured through a laser particle size analyzer.

The invention has the following advantages and beneficial effects:

1. the spray performance test device for the containment spray system of the nuclear power plant can be used for the test of the spray performance of the containment spray system of the nuclear power plant.

2. The invention can test the spraying performance of a single nozzle under different offset angle conditions, and can test the interference effect of adjacent nozzles at different angles and different distances.

3. The distance-angle adjusting mechanism has two optional forms, can flexibly adjust the applicable size of the device according to actual requirements, and is simple, reliable and convenient to operate.

4. The test result of the invention can provide a basis for the optimization design and safety evaluation of the containment vessel spraying system.

5. The invention reserves a larger spray field development space in the test area, ensures that the spray field has no interference, and simultaneously reserves higher expansibility, and can be conveniently modified.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of an alternative form 1 of the "interval-angle adjustment mechanism" as a constituent part in the present invention.

Fig. 3 is a schematic structural view of an alternative form 2 of the "interval-angle adjustment mechanism" as a component in the present invention.

Fig. 4 is a schematic diagram of the operation of the present invention in the state that the middle spray pipeline is opened.

FIG. 5 is a schematic view of the side shower line of the present invention in an open state.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, a nuclear power plant containment vessel spraying system spraying performance test device includes a branch regulating valve 1 No. 1, a ball valve 2 No. 1, a bypass regulating valve 3, a bypass branch 4, a branch regulating valve 5 No. 2, a water supply pump 6, a lateral pipeline interval-angle regulating mechanism 7, a lateral nozzle 8, a lateral pipeline pressure transmitter 9, a ball valve 3, an inlet filter 11, a sump 12, a middle pipeline pressure transmitter 13, a middle pipeline interval-angle regulating mechanism 14, a middle nozzle 15, a ball valve 4, a spraying water tank 17 and a ball valve 2 18.

The spraying performance test device is based on a rectangular spraying water tank 17, wherein the south and north directions are short sides, and the east and west directions are long sides; the spraying performance test device is provided with four spraying pipelines which are respectively a south side No. 1 spraying pipeline, a south side No. 2 spraying pipeline, a north side No. 1 spraying pipeline and a north side No. 2 spraying pipeline, wherein the south side No. 1 spraying pipeline and the north side No. 1 spraying pipeline are positioned above a fence at the west side of the spraying water pool 17, the south side No. 2 spraying pipeline and the north side No. 2 spraying pipeline are positioned above the center of the spraying water pool 17, and the south side No. 1 spraying pipeline and the north side No. 1 spraying pipeline as well as the south side No. 2 spraying pipeline and the north side No. 2 spraying pipeline are structurally symmetrical along the central axis of the length direction of the spraying water pool 17; a square sump 12 is arranged at the northwest corner of the water tank fence, a water supply pump 6 is arranged in a pump pit at the outer side of the water tank beside the sump 12, an inlet filter 11 is reserved at the bottom of the sump 12, the inlet filter 11 is connected with the water supply pump 6 through a water supply pipeline, water in the sump 12 is sucked into the water supply pump 6 through the inlet filter 11, an outlet of the water supply pump 6 is connected with a Y-shaped filter through a pipeline, then a pipeline is arranged at the outer side of a spraying water tank 17, a four-way pipe is connected at the middle point of the short side of the spraying water tank 17 and is divided into three pipelines, the first pipeline is a four-way pipe, the middle direction of the four-way pipe is connected with a bypass adjusting valve 3 and a bypass branch 4, and the bypass branch is communicated with the sump 12 by adhering to the inner wall surface of the water tank; the second path supplies water for the No. 1 spraying pipeline on the south side and the No. 2 spraying pipeline on the south side of the four-way pipe, and the third path supplies water for the No. 1 spraying pipeline on the north side and the No. 2 spraying pipeline on the north side of the four-way pipe; for south side No. 1 spray pipeline and south side No. 2 spray pipeline, a pipeline is connected to the south side along the top end of a pool fence at a four-way joint, a flowmeter is arranged at the position with 20-time pipe diameter at intervals, a No. 1

branch adjusting valve

1,1 is arranged at the 15-time pipe diameter position at the downstream of the flowmeter to control the flow of the south side No. 1 spray pipeline and the south side No. 2 spray pipeline, a No. 1 branch adjusting valve 1 is arranged at the downstream of the flowmeter and divided into two paths, the two paths are respectively connected with the south side No. 1 spray pipeline and the south side No. 2 spray pipeline, one path is vertically led out upwards, a No. 1

ball valve

2,1 ball valve 2 is arranged at the pipe diameter position 10 times of the joint, then a straight pipe section is arranged, a 90-degree elbow is connected to the position 5.5 meters away from the ground, the distance to the north, a lateral pipeline distance-angle adjusting mechanism 7 is arranged at the pipe diameter position 10 times of the elbow, a lateral pipeline pressure transmitter 9 and a lateral nozzle 8 are arranged at the downstream of the lateral pipeline, and the south side No. 1 spray pipeline is formed; leading out another pipeline at a downstream three-way joint of the No. 1 branch regulating valve 1, arranging along the top end of a pool fence, connecting a 90-degree upward elbow at the middle point of the long side of the pool, installing a No. 2

ball valve

ball valves

2, 18, 10 and 16 corresponding to each pipeline.

As shown in fig. 2 and 3, the distance-angle adjusting mechanism has two optional forms, one is composed of two pairs of loop flanges 19 and a section of replaceable pipe section 22 between the two pairs of loop flanges 19, the nozzle distance adjustment is realized by replacing the replaceable pipe section 22 with different lengths, the offset angle adjustment is realized by rotating the loop flanges 19, and the mechanism is suitable for the swirl nozzle with the nozzle outlet direction being 90 degrees to the fluid inlet; the second selection form is composed of 3

movable joints

As shown in fig. 4 and 5, the south spray pipeline 1 and the north spray pipeline 1, or the south spray pipeline 2 and the north spray pipeline 2, which are in opposite positions, are simultaneously opened to perform the test of the interference effect of the adjacent nozzles; the south spray pipeline No. 2 and the north spray pipeline No. 2 which are positioned above the middle part of the spray water pool 17 perform vertical downward spray and lateral spray interference or spray interference of two nozzles with small offset angles; the south side No. 1 spray pipeline and the north side No. 1 spray pipeline which are positioned above the west side fence of the water pool perform spray interference of the large-offset-angle nozzles, and the field space is fully utilized.

In a preferred embodiment of the invention, the suspended part of the spray pipeline is hoisted and fixed at the upper part, and no interference structure is generated below and at the side of the nozzle.

The spray performance test device of the containment spray system of the nuclear power plant can be used for testing spray performance indexes including pressure drop characteristics, atomization cone angles and atomization granularity, wherein the pressure drop characteristics are measured by a device instrument, the atomization cone angles can be measured by an image method, and the atomization granularity can be measured by a laser particle size analyzer.

The specific test method of the pressure drop characteristic comprises the following steps: taking the south side spray pipeline No. 2 as an example, the ball valve No. 2 18 on the south side spray pipeline No. 2 to be tested is opened, the ball valve No. 12, the ball valve No. 3 and the ball valve No. 4 are closed, the middle pipeline interval-angle adjusting mechanism 14 is adjusted to enable the middle nozzle 15 to reach a rated offset angle, the water supply pump 6 is opened, the bypass adjusting valve 3 and the branch adjusting valve No. 1 are adjusted to control the flow to the rated working condition, the test is carried out after the operation is stable, the flow and pressure drop data under the rated working condition can be respectively obtained through the flow meter arranged on the test device and the middle pipeline pressure transmitter 13, and the pressure drop characteristic curve can be drawn through the flow and pressure drop data under different working conditions of multiple times of side measurement.

The specific test method of the atomization cone angle comprises the following steps: taking the south side No. 2 spray pipeline as an example, a No. 2 ball valve 18 on the south side No. 2 spray pipeline to be tested is opened, a No. 1 ball valve 2, a No. 3 ball valve 10 and a No. 4 ball valve 16 are closed, a middle pipeline interval-angle adjusting mechanism 14 is adjusted to enable a middle nozzle 15 to reach a rated offset angle, a water supply pump 6 is opened, a bypass adjusting valve 3 and a No. 1 branch adjusting valve 1 are adjusted to control the flow to a rated working condition, test testing is carried out after stable operation is carried out, three different fixed visual angles at intervals of 120 degrees are selected around the axis direction of a nozzle outlet to carry out shooting and measuring on an atomization cone angle, a camera and the outlet of the spray head are located at the same horizontal position along the axis direction at a distance of 10cm, and the selected camera lens can at least cover all liquid drops in the axis direction of the maximum spray angle spray head outlet within the window range at the shooting distance. After the picture is shot, the picture is guided into Auto CAD software by using an Imageattach command, the edge of the atomization cone angle is sketched by using a line command, and the atomization cone angle can be obtained by using an angle marking command dimangular.

The specific test method of the atomization granularity is as follows: taking the south side spray pipeline 2 as an example, the ball valve 2 18 on the south side spray pipeline 2 to be tested is opened, the

ball valves

2, 3 and 4 are closed, and the middle pipeline interval-angle adjusting mechanism 14 is adjusted to enable the middle nozzle 15 to reach a rated offset angle. Adjusting the laser particle analyzer to enable a light path of the laser particle analyzer to pass through the center of the spray field, starting the water supply pump 6 after the background test state of the laser particle analyzer is stable, adjusting the bypass adjusting valve 3 and the No. 1 branch adjusting valve 1 to control the flow to a rated working condition, performing test tests after the operation is stable, and acquiring 10-20 records by the laser particle analyzer to average to obtain various characteristic particle size parameters of the spray field. The method for testing the interference effect of the adjacent nozzles is similar, taking the use of No. 2 spraying pipelines on the north side and No. 2 spraying pipelines on the south side as an example, a No. 4 ball valve 16 on the No. 2 spraying pipeline on the north side to be tested is opened, a No. 2 ball valve 18 on the No. 2 spraying pipeline on the south side is closed, a No. 1 ball valve 2 and a No. 3 ball valve 10 are closed, and a middle pipeline interval-angle adjusting mechanism 14 is adjusted to enable a middle nozzle 15 to reach a rated offset angle and a rated interval. Adjusting the laser particle analyzer to enable a light path of the laser particle analyzer to pass through the coherent positions of the two spray fields, starting the water supply pump 6 after the background test state of the laser particle analyzer is stable, adjusting the bypass adjusting valve 3 and the No. 1 branch adjusting valve 1 and the No. 2 branch adjusting valve 5 to control the flow to the rated working condition, performing test after the operation is stable, and acquiring 10-20 records for averaging through the laser particle analyzer to obtain various characteristic particle size parameters under the coherent effect of the spray fields.

The device provided by the invention is reliable in operation, the method is feasible, and the function can be better realized. The whole device is simple and convenient to operate, and the test working efficiency can be obviously improved.

While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a nuclear power plant's containment spraying system sprays performance test device which characterized in that: the device comprises a No. 1 branch regulating valve (1), a No. 1 ball valve (2), a bypass regulating valve (3), a bypass branch (4), a No. 2 branch regulating valve (5), a water supply pump (6), a lateral pipeline spacing-angle regulating mechanism (7), a lateral nozzle (8), a lateral pipeline pressure transmitter (9), a No. 3 ball valve (10), an inlet filter (11), a sump (12), a middle pipeline pressure transmitter (13), a middle pipeline spacing-angle regulating mechanism (14), a middle nozzle (15), a No. 4 ball valve (16), a spray water tank (17) and a No. 2 ball valve (18);

the spraying performance test device is based on a rectangular spraying water tank (17), wherein the south and north directions are short sides, and the east and west directions are long sides; the spraying performance test device is provided with four spraying pipelines which are respectively a south side No. 1 spraying pipeline, a south side No. 2 spraying pipeline, a north side No. 1 spraying pipeline and a north side No. 2 spraying pipeline, wherein the south side No. 1 spraying pipeline and the north side No. 1 spraying pipeline are positioned above a west side fence of a spraying water tank (17), the south side No. 2 spraying pipeline and the north side No. 2 spraying pipeline are positioned above the center of the spraying water tank (17), and the south side No. 1 spraying pipeline and the north side No. 1 spraying pipeline, the south side No. 2 spraying pipeline and the north side No. 2 spraying pipeline are structurally symmetrical along the central axis in the length direction of the spraying water tank (17); a square sump pit (12) is arranged at the northwest corner of the water tank fence, a water supply pump (6) is arranged in a pump pit at the outer side of the water tank beside the sump pit (12), an inlet filter (11) is reserved at the bottom of the sump pit (12), the inlet filter (11) is connected with the water supply pump (6) through a water supply pipeline, water in the sump pit (12) is sucked into the water supply pump (6) through the inlet filter (11), the outlet of the water supply pump (6) is connected with a Y-shaped filter through a pipeline, then a pipeline is arranged at the outer side of the spray water tank (17), a four-way pipe is connected at the midpoint of the short edge of the spray water tank (17) and is divided into three pipelines, the first pipeline is connected with a bypass adjusting valve (3) and a bypass branch (4) in the middle direction of the four-way pipe, and the bypass branch is communicated with the sump pit (12) by adhering to the inner wall surface of the water tank; the second path supplies water for the No. 1 spraying pipeline on the south side and the No. 2 spraying pipeline on the south side of the four-way pipe, and the third path supplies water for the No. 1 spraying pipeline on the north side and the No. 2 spraying pipeline on the north side of the four-way pipe; for south side No. 1 spray pipeline and south side No. 2 spray pipeline, a pipeline is connected to the south side along the top end of a pool fence at a four-way joint, a flowmeter is arranged at the position with 20-time pipe diameter, a No. 1 branch regulating valve (1) is arranged at the position 15-time pipe diameter downstream of the flowmeter, the No. 1 branch regulating valve (1) controls the flow of the south side No. 1 spray pipeline and the south side No. 2 spray pipeline, a three-way joint is arranged at the downstream of the No. 1 branch regulating valve (1) and is divided into two paths which are respectively connected with the south side No. 1 spray pipeline and the south side No. 2 spray pipeline, one path is led out vertically upwards, a No. 1 ball valve (2) is arranged at the position 10-time pipe diameter away from the joint, a straight pipe section is arranged behind the No. 1 ball valve (2), a 90-degree elbow is connected to the position 5.5 meters away from the ground, the elbow is bent to the north, a lateral pipeline spacing-angle regulating mechanism (7) is arranged at the position 10-time pipe diameter away from the elbow, a lateral pipeline pressure transmitter (9) and a lateral nozzle (8) are arranged at the downstream, so as to form the south side No. 1 spray pipeline; leading out another pipeline at a downstream three-way joint of the No. 1 branch regulating valve (1), arranging along the top end of a pool fence, connecting a 90-degree upward elbow at the middle point of the long side of the pool, installing a No. 2 ball valve (18) at a position 10 times of pipe diameter away from the joint, arranging a straight pipe section behind the No. 2 ball valve (18), connecting a 90-degree elbow at a position 5.5 meters away from the ground, bending to the north, installing a middle pipeline interval-angle regulating mechanism (14) at a position 10 times of pipe diameter away from the elbow, and installing a middle pipeline pressure transmitter (13) and a middle nozzle (15) at the downstream to form a No. 2 spraying pipeline on the south side; for the No. 1 north spray pipeline and the No. 2 north spray pipeline, the four-way joint is connected with a pipeline to the north along the top end of the pool fence, and the pipelines are respectively and symmetrically arranged with the No. 1 south spray pipeline and the No. 2 south spray pipeline to form the No. 1 north spray pipeline and the No. 2 north spray pipeline; each spraying pipeline independently adjusts the arrangement angle and the relative position of a nozzle through a lateral pipeline interval-angle adjusting mechanism (7) and a middle pipeline interval-angle adjusting mechanism (14), and each spraying pipeline is respectively opened through a No. 1 ball valve (2), a No. 2 ball valve (18), a No. 3 ball valve (10) and a No. 4 ball valve (16) corresponding to each pipeline;

the lateral pipeline spacing-angle adjusting mechanism (7) and the middle pipeline spacing-angle adjusting mechanism (14) have two selection forms, wherein the first selection form comprises two pairs of loop flanges (19) and a section of replaceable pipe section (22) positioned between the two pairs of loop flanges (19), the nozzle spacing adjustment is realized by replacing the replaceable pipe sections (22) with different lengths, the offset angle adjustment is realized by rotating the loop flanges (19), and the spiral-flow type nozzle is suitable for a spiral-flow type nozzle with the nozzle outlet direction forming an angle of 90 degrees with a fluid inlet; the second selection form comprises 3 movable joints (20) and 3 bent pipe sections (21), the adjustment of the distance and the offset angle is realized through the matching of the 3 movable joints (20), and the second selection form is suitable for nozzles with the nozzle outlet direction and the fluid inlet in the same direction;

simultaneously starting the south side No. 1 spray pipeline and the north side No. 1 spray pipeline which are in opposite positions, or starting the south side No. 2 spray pipeline and the north side No. 2 spray pipeline to carry out an adjacent nozzle interference effect test; the south side No. 2 spray pipeline and the north side No. 2 spray pipeline which are positioned above the middle part of the spray water tank (17) perform vertical downward spray and lateral spray interference or spray interference of two nozzles with small offset angles; the south side No. 1 spray pipeline and the north side No. 1 spray pipeline which are positioned above the west side fence of the water pool perform spray interference of the large-offset-angle nozzles, and the field space is fully utilized.

2. The nuclear power plant containment spraying system spraying performance testing device of claim 1, characterized in that: the suspended part of the spraying pipeline is hoisted and fixed at the upper part, and no interference structure is arranged below and on the side of the nozzle.