Disassembly-free pressure test blind plate system of pipeline system
By installing test blind flanges and external pipe assemblies at the highest and lowest points of the pipeline system, the problem of disassembly required for pipeline pressure testing in existing technologies is solved, enabling pressure testing operations without disassembly and improving testing efficiency and safety.
Patent Information
- Application Number
- CN202422780000.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-11-14
AI Technical Summary
In existing technologies, pipeline pressure testing requires dismantling and reinstallation, which consumes a lot of manpower, machinery and time, increasing project costs.
The pipeline system adopts a non-disassembly pressure testing blind flange system. By installing pressure testing blind flanges and external pipeline components at the highest and lowest points of the pipeline system, and using pressure gauges and valves to form a pressure testing system, water inlet, drainage and pressure testing operations can be achieved without disassembling the pipeline.
It reduces construction time and costs, improves pressure testing efficiency, ensures the accuracy and safety of pipeline sealing tests, and reduces resource waste and safety risks caused by leaks.
Smart Images
Figure CN223637050U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pipeline pressure test technical field, specifically, relate to a pipeline system disassembly -free pressure test blind plate system. BACKGROUND
[0002] Pipeline pressure test is through filling liquid or gas into pipeline, through pressurizing equipment to the liquid or gas in pipeline to test the strength and tightness of pipeline, weld and sealing surface, to avoid the safety problem of pipeline in normal use. Due to the complexity of pipeline design, part of pipeline system has no import position (or air inlet) and discharge port, so that liquid or gas cannot be injected. The prior art removes the connected pipeline, reassembles on the ground, and re-installs after pressure test. This technology needs to remove and reinstall the pipeline system, consumes a large amount of manual machinery in construction, and has long operation time and increased engineering cost. SUMMARY
[0003] The utility model provides a pipeline system disassembly -free pressure test blind plate system, solve the problem of test device in the related art that needs to remove and reinstall the pipeline system, consumes a large amount of manual machinery in construction, and has long operation time and increased engineering cost.
[0004] The technical scheme of the utility model is as follows:
[0005] A pipeline system disassembly -free pressure test blind plate system is used for detecting the sealing property of a plurality of flange interfaces of a pipeline system, comprising:
[0006] A plurality of pressure test blind plates are arranged at the interface flanges at the highest point and the lowest point of the pipeline system respectively, the pressure test blind plate has a flow channel, and the flow channel is in communication with the pipeline system and the outside world;
[0007] An external pipeline assembly is arranged at one end of the flow channel and extends to the outside of the pressure test blind plate at the other end, and the external pipeline assembly has a water inlet;
[0008] A first pressure gauge is arranged on the external pipeline assembly, and the first pressure gauge is used for testing the pressure at the pressure test blind plate.
[0009] Preferably, the external pipeline assembly comprises:
[0010] A first pipeline is in communication with the flow channel at one end and extends to the outside of the pressure test blind plate at the other end, and the first pressure gauge is arranged on the other end of the first pipeline;
[0011] A sixth valve is arranged on the first pipeline, and the sixth valve is located on the side close to the first pressure gauge;
[0012] A fourth valve is arranged on the first pipeline, and the fourth valve is located on the side close to the pressure test blind plate;
[0013] A second pipeline is communicated with the first pipeline at the pipe body and located between the fourth valve and the sixth valve, and the other end of the second pipeline extends to the outside of the pipeline system;
[0014] A third pipeline is communicated with the second pipeline at the pipe body, and the other end of the third pipeline is located outside the second pipeline, and the water injection port is arranged on the other end of the third pipeline;
[0015] A first valve is arranged on the first pipeline, and the first valve is used for controlling the opening and closing of the water injection port;
[0016] The first pipeline, the second pipeline and the third pipeline are communicated with each other, and the first pipeline, the second pipeline and the third pipeline are located at the interface flange of the lowest point of the pipeline system.
[0017] Preferably, the external pipeline assembly further comprises:
[0018] A pressurizing device is arranged on the other end of the second pipeline, and the pressurizing device is used for injecting compressed gas into the second pipeline to pressurize the water flow after the water flow is injected into the third pipeline through the water injection port;
[0019] A second valve is arranged on the second pipeline and located on the side of the pressurizing device, and the second valve is used for controlling the amount of compressed gas injected into the second pipeline.
[0020] Preferably, the flow channel has a plurality of flow channels, and the plurality of flow channels are located at 0° and 180° of the pressure test blind hole respectively, each flow channel has a first channel and a second channel, the first channel and the second channel are vertically arranged and communicated with each other, and the first channel and the second channel are communicated with the pipeline system.
[0021] Preferably, the first pipeline is communicated with the second channel at 0°; and the external pipeline assembly further comprises:
[0022] A discharge pipe is communicated with the second channel at 180° at one end, and the other end of the discharge pipe is located outside the pipeline system, and the discharge pipe is used for discharging the pressure test water;
[0023] A fifth valve is arranged on the discharge pipe, and the fifth valve is used for controlling the opening and closing of the discharge pipe.
[0024] Preferably, the external pipeline assembly further comprises:
[0025] Fourth pipeline, one end with the test pressure blind plate 0 ° of the second channel in the pipeline system highest point, the other end extends to the outside of the pipeline system;
[0026] Second pressure gauge, provided on the other side of the fourth pipeline, the second pressure gauge is used to display the pressure value of the test pressure blind plate at the highest point
[0027] The eighth valve is arranged on the fourth pipeline.
[0028] Preferably, the external pipeline assembly further comprises:
[0029] The fifth pipeline, one end with the test pressure blind plate 180 ° of the second channel in the pipeline system highest point;
[0030] Safety valve, provided on the other end of the fifth pipeline;
[0031] The seventh valve is arranged on the fifth pipeline.
[0032] Preferably, the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline and the discharge pipe are steel pipes.
[0033] Preferably, it further comprises:
[0034] The sleeve joint is arranged at the second through hole of the test pressure blind plate, and the first pipeline, the discharge pipe, the fourth pipeline and the fifth pipeline are communicated with the test pressure blind hole through the sleeve joint.
[0035] Preferably, the external pipeline assembly further comprises:
[0036] The third valve is arranged on the side of the second pipeline close to the first pipeline.
[0037] The working principle and beneficial effects of the utility model are as follows:
[0038] The utility model solves the problem of test pressure pipeline dismounting or opening hole, and the blind plate body can be used as an isolated process pipeline system when the pipeline is tested. A pipeline test pressure system is formed by using the external pipeline assembly and the pressure gauge. The water (air) inlet, water (air) discharge and test pressure can be completed without dismounting the pipeline. The utility model has multiple functions, strong applicability, can accelerate the test pressure efficiency and reduce the construction cost. BRIEF DESCRIPTION OF DRAWINGS
[0039] The above characteristics, technical features, advantages and implementation modes of the utility model will be further described in the following clear and understandable manner combined with the preferred embodiments and the drawings.
[0040] Fig. 1The utility model discloses a whole structure schematic diagram.
[0041] Fig. 2 The utility model discloses a pressure test blind plate internal structure schematic diagram.
[0042] Fig. 3 The utility model discloses a pressure test blind plate structure schematic diagram.
[0043] Fig. 4 The utility model discloses a sleeve joint structure schematic diagram.
[0044] In the drawing: 1, pipeline system;100, external pipeline assembly;2, pressure test blind plate;201, flow channel;211, first channel;212, second channel;3, first pipeline;4, second pipeline;5, third pipeline;6, pressurizing equipment;7, discharge pipe;8, fourth pipeline;9, fifth pipeline;10, ordinary blind plate;11, first valve;12, second valve;13, fourth valve;14, fifth valve;15, sixth valve;16, third valve;17, seventh valve;18, safety valve;19, eighth valve;20, second pressure gauge;21, first pressure gauge;22, sleeve joint. DETAILED DESCRIPTION
[0045] In order to make the technical scheme of the embodiments of the utility model or the prior art clearer, the specific implementation of the utility model will be described below with reference to the drawings. Obviously, the drawings in the following description only represent some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative effort, and other embodiments can also be obtained.
[0046] In order to make the drawing simple, only the parts related to the utility model are shown in each drawing, and they do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".
[0047] In this paper, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0048] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0049] Referring to Figs. 1-4 For the first embodiment of the utility model, a pipeline system disassembly-free pressure test blind plate system is proposed for detecting the sealing performance of a plurality of flange interfaces of a pipeline system 1, comprising: a plurality of pressure test blind plates 2, each of which is arranged at a highest point interface flange and a lowest point interface flange of the pipeline system 1, and each of which has a flow channel 201 that is in communication with the pipeline system 1 and the outside; an external pipeline assembly 100, one end of which is arranged on the flow channel 201 and the other end of which extends to the outside of the pressure test blind plate 2, and the external pipeline assembly 100 has a water inlet; and a first pressure gauge 21 arranged on the external pipeline assembly 100, which is used for testing the pressure at the pressure test blind plate 2.
[0050] In the above scheme, at the highest point and the lowest point flanges of the pipeline system 1, the installation personnel uses professional tools to tightly fix the pressure test blind plate 2, so as to ensure the sealing performance thereof. One end of the external pipeline assembly 100 is stably connected with the flow channel 201 of the pressure test blind plate 2, and the other end extends to a suitable position outside the blind plate. On this external pipeline assembly 100, the high-precision first pressure gauge 21 is accurately installed, which is used for monitoring the pressure fluctuation at the pressure test blind plate 2 in real time. This pressure test blind plate 2 system avoids the disassembly and reinstallation operation of the connected pipeline in the traditional pressure test technology, greatly saves the human and mechanical resources, shortens the construction period, and reduces the engineering cost. At the same time, by arranging the pressure test blind plate 2 and the external pipeline assembly 100 and the first pressure gauge 21 at the highest point and the lowest point, the sealing performance of the entire pipeline system 1 can be comprehensively and accurately detected, the safety and reliability of the water supply pipeline in subsequent use are effectively ensured, and the waste of water resources and the potential safety accident hidden danger caused by pipeline leakage are reduced.
[0051] Further, the external pipeline assembly 100 comprises: a first pipeline 3, one end of which is in communication with the flow channel 201, and the other end of which extends to the outside of the pressure test blind plate 2, and the first pressure gauge 21 is arranged on the other end of the first pipeline 3; a sixth valve 15 arranged on the first pipeline 3, and the sixth valve 15 is located on the side close to the first pressure gauge 21; a fourth valve 13 arranged on the first pipeline 3, and the fourth valve 13 is located on the side close to the pressure test blind plate 2; a second pipeline 4, one end of which is in communication with the pipe body of the first pipeline 3 and located between the fourth valve 13 and the sixth valve 15, and the other end of which extends to the outside of the pipeline system 1; a third pipeline 5, one end of which is in communication with the pipe body of the second pipeline 4, and the other end of which is located outside the second pipeline 4, and the water injection port is arranged on the other end of the third pipeline 5; and a first valve 11 arranged on the first pipeline 3, and the first valve 11 is used for controlling the opening and closing of the water injection port; the first pipeline 3, the second pipeline 4 and the third pipeline 5 are in communication with each other, and the first pipeline 3, the second pipeline 4 and the third pipeline 5 are located at the interface flange of the lowest point of the pipeline system 1.
[0052] In the above scheme, the reasonable layout of each valve facilitates the operator to flexibly adjust according to the needs of different pressure test stages. The mutual communication of the first pipeline 3, the second pipeline 4 and the third pipeline 5 and the cooperation of the valves not only can realize efficient water injection, but also can accurately adjust the pressure during the pressure test, improve the accuracy and reliability of the pressure test, further ensure the smooth progress of the pressure test of the pipeline system 1, and reduce the pressure test failure or safety risk caused by inconvenient operation or inaccurate control.
[0053] Further, the external pipeline assembly 100 further comprises: a pressurizing device 6 arranged on the other end of the second pipeline 4, and after the water flow is introduced into the third pipeline 5 through the water injection port, the pressurizing device 6 is used for introducing compressed gas into the second pipeline 4 to pressurize the water flow; and a second valve 12 arranged on the second pipeline 4 and located on the side of the pressurizing device 6, and the second valve 12 is used for controlling the amount of compressed gas introduced into the second pipeline 4.
[0054] In the above scheme, the second valve 12 with accurate control is installed on the second pipeline 4 and located on the side of the pressurizing device 6, which is used for accurately adjusting the amount of compressed gas introduced.
[0055] Further, the flow channel 201 has a plurality of flow channels 201, and the plurality of flow channels 201 are respectively located at positions of 0° and 180° of the pressure test blind hole, each flow channel 201 has a first channel 211 and a second channel 212, the first channel 211 and the second channel 212 are vertically arranged and in communication with each other, and the first channel 211 and the second channel 212 have pipeline system 1 communication.
[0056] In the above scheme, in the pressure test process, the liquid or gas enters the first channel 211 of the flow channel 201 of the pressure test blind plate 2, and then turns in the flow channel 201 to enter the second channel 212, and flows to the pipeline system 1. In this process, due to the rationality of the structure of the flow channel 201, the pressure loss of the water flow or the gas flow is small, which can accurately reflect the pressure condition inside the pipeline system 1, and the first pressure gauge 21 can obtain relatively accurate pressure data in real time, which provides a reliable basis for the judgment of the pressure test result.
[0057] Beneficial effects: In the process of water injection or gas injection pressure test, the pressure can be uniformly distributed in the flow channel 201, the pressure fluctuation and measurement error caused by the unreasonable structure of the flow channel 201 are reduced, the reliability of the pressure test data is improved, the sealing of the pipeline system 1 is more accurately judged, potential leakage risks are found in time, the safe operation of the water supply pipeline system 1 is ensured, the efficiency of the pressure test work is improved, and the repeated test work caused by inaccurate data is reduced.
[0058] Further, the first pipeline 3 is in communication with the second channel 212 located at 0°; further comprising: a discharge pipe 7, one end of which is in communication with the second channel 212 located at 180°, the other end of the discharge pipe 7 is located outside the pipeline system 1, and the discharge pipe 7 is used for discharging water for pressure test; a fifth valve 14 is arranged on the discharge pipe 7, and the fifth valve 14 is used for controlling the opening and closing of the discharge pipe 7.
[0059] In the above scheme, at the pressure test blind plate 2 at the lowest point of the urban water supply pipeline system 1, the first pipeline 3 is in stable communication with the second channel 212 located at 0°, and one end of the discharge pipe 7 is tightly connected with the second channel 212 located at 180°, and the other end leads to a designated drainage area outside the pipeline system 1.
[0060] Further, the external pipeline assembly 100 further comprises: a fourth pipeline 8, one end of which is in communication with the second channel 212 located at 0° of the pressure test blind plate 2 at the highest point of the pipeline system 1, and the other end extends to the outside of the pipeline system 1; a second pressure gauge 20 is arranged on the other side of the fourth pipeline 8, and the second pressure gauge 20 is used for displaying the pressure value borne by the pressure test blind plate 2 at the highest point; an eighth valve 19 is arranged on the fourth pipeline 8.
[0061] Further, the external pipeline assembly 100 further comprises: a fifth pipeline 9, one end of which is in communication with the second channel 212 located at 180° of the pressure test blind plate 2 at the highest point of the pipeline system 1; a safety valve 18 is arranged at the other end of the fifth pipeline 9; and a seventh valve 17 is arranged on the fifth pipeline 9.
[0062] Further, the external pipeline assembly 100 further comprises: a third valve 16 arranged on the second pipeline 4 close to the first pipeline 3, and ordinary blind plates 10 can be used at other pipeline joint flanges located at other positions of the pipeline system 1, such as a middle position of the pipeline system 1.
[0063] In the above scheme, during the water injection stage, the third valve 16 is in a closed state, so as to ensure the uniqueness and stability of the water injection path. During the pressurization stage, the third valve 16 is gradually adjusted according to the pressure change, so as to realize fine control of the pressure and flow in the pipeline. During the blow-off stage after the pressure test, the third valve 16 can also be adjusted to work cooperatively with other valves according to the blow-off requirement, so as to control the blow-off speed and pressure.
[0064] In summary, it needs to be explained that the specific working process of the utility model is as follows:
[0065] 1. According to the pressure test system diagram, the pressure test pipeline is determined, and the test pressure and the blind plate sealing position are determined.
[0066] 2. According to the pipeline system 1, the highest point and the lowest point flange position in the pipeline system 1 are found, and the test pressure special blind plate specification is selected according to the highest point and the lowest point interface flange diameter.
[0067] 3. The test pressure special blind plate is installed at the selected position, the blind plate is 0° upward and 180° downward, the flange is disassembled and the special blind plate is added, and the ordinary blind plate 10 is installed at other positions that need to be blocked.
[0068] 4. The special blind plate screw thread is provided with a sleeve joint 22 with a sealing gasket, a steel pipe of a corresponding diameter is connected, and a low point first pressure gauge 21, a valve, a pressurizing device 6 and a safety valve 18 are installed by using the tee sleeve joint 22 and the corresponding steel pipe, and a high point second pressure gauge 20 is temporarily not installed.
[0069] 5. The first valve 11, the third valve 16, the fourth valve 13, the sixth valve 15 and the eighth valve 19 are opened, the second valve 12, the fifth valve 14 and the seventh valve 17 are closed, liquid or gas is filled into the system from the filling inlet, and the safety valve 18 is added at the rear end of the seventh valve 17, and the seventh valve 17 is closed at the same time.
[0070] 6. After the liquid flows out of the high point second pressure gauge 20, the water filling is stopped, the seventh valve 17 is opened when the gas is filled, the first valve 11 is closed, the second valve 12 is opened, and the pressurizing device 6 is started to pressurize.
[0071] 7. After pressurizing to the specified pressure, close the second valve 12. After maintaining the pressure for the specified time, open the fifth valve 14 to reduce the tightness test pressure and then close the fifth valve 14. After the pressure test is qualified, open the seventh valve 17 first to release the gas and then open the fifth valve 14. After opening the fifth valve 14, remove the second pressure gauge 20 to release the liquid.
[0072] 8. After the liquid is completely drained, remove the special blind flange at the lowest point. The liquid pipeline needs to be connected to compressed air from the original second pressure gauge 20 joint and the seventh valve 17 to purge the residual liquid. The pressure test is then completed.
[0073] Furthermore, the first pipe 3, the second pipe 4, the third pipe 5, the fourth pipe 8, the fifth pipe 9, and the discharge pipe 7 are all steel pipes.
[0074] Furthermore, it also includes: a compression fitting 22, which is installed at the second through hole of the pressure test blind plate 2, and the first pipe 3, the discharge pipe 7, the fourth pipe 8 and the fifth pipe 9 are all connected to the pressure test blind hole through the compression fitting 22.
[0075] In the above scheme, before installing the ferrule connector 22, the connection between the steel pipe and the pressure test blind flange 2 is cleaned and polished to remove surface impurities and oxide layers, improving the tightness of the connection. During the tightening process of the ferrule, the specified torque must be strictly followed to avoid poor sealing or damage to the ferrule due to excessive or insufficient torque. During the sealing test phase, pressure changes are monitored in real time. If the pressure drops, the ferrule connector 22 is inspected in detail to locate and repair any leaks.
[0076] Beneficial effects: The proper selection and correct installation of the compression fitting 22 ensures reliable connection and good sealing between each pipe and the pressure testing blind flange 2. During the pressure test, it can withstand the impact of high-pressure liquid or gas, preventing leakage. Its high strength and corrosion resistance meet the special environmental requirements of the water supply pipeline system 1, extending the service life of the fitting, reducing pressure test failures and pipeline system 1 malfunctions caused by fitting leakage, improving the stability and reliability of the entire pressure testing blind flange 2 system, and ensuring the smooth progress of the urban water supply pipeline pressure test.
[0077] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A pipeline system disassembly-free pressure test blind plate system for detecting the tightness of several interface flanges of a pipeline system (1), characterized in that include: A pressure test blind flange (2) is provided, and the pressure test blind flange (2) is respectively provided at the interface flange at the highest point and the interface flange at the lowest point of the pipeline system (1). The pressure test blind flange (2) has a flow channel (201), which is connected to the pipeline system (1) and to the outside world. An external piping assembly (100) has one end disposed on the flow channel (201) and the other end extended to the outside of the test pressure blind plate (2). The external piping assembly (100) has a water inlet. A first pressure gauge (21) is installed on the external pipe assembly (100) and is used to test the pressure at the test pressure blind plate (2).
2. A dismountable pressure test blind system for a pipe system according to claim 1, characterized in that The external conduit assembly (100) includes: The first pipe (3) is connected at one end to the flow channel (201) and at the other end to the outside of the test pressure blind plate (2). The first pressure gauge (21) is set on the other end of the first pipe (3). The sixth valve (15) is disposed on the first pipe (3), and the sixth valve (15) is located on the side close to the first pressure gauge (21); A fourth valve (13) is provided on the first pipe (3), and the fourth valve (13) is located on the side close to the test pressure blind plate (2); The second pipe (4) is connected at one end to the body of the first pipe (3) and located between the fourth valve (13) and the sixth valve (15), and the other end extends to the outside of the pipe system (1); The third pipe (5) has one end connected to the body of the second pipe (4) and the other end located outside the second pipe (4). The water inlet is located at the other end of the third pipe (5). The first valve (11) is installed on the first pipe (3) and is used to control the opening and closing of the water inlet; The first pipe (3), the second pipe (4) and the third pipe (5) are all interconnected, and the first pipe (3), the second pipe (4) and the third pipe (5) are all located at the interface flange at the lowest point of the pipe system (1).
3. A dismountable pressure test blind system for a pipe system according to claim 2, characterized in that The external conduit assembly (100) also includes: A pressurizing device (6) is installed at the other end of the second pipe (4). After the water inlet is connected to the third pipe (5), the pressurizing device (6) is used to pressurize the water flow by introducing compressed gas into the second pipe (4). The second valve (12) is disposed on the second pipe (4) and located on one side of the pressurizing device (6). The second valve (12) is used to control the amount of compressed gas introduced into the second pipe (4).
4. A dismountable pressure test blind system for a pipe system according to claim 2, characterized in that The flow channel (201) has several, several flow channels (201) are respectively located at 0° and 180° of the pressure test blind plate (2), each flow channel (201) has a first channel (211) and a second channel (212), the first channel (211) and the second channel (212) are vertically arranged and communicated with each other, the first channel (211) and the second channel (212) are communicated with the pipeline system (1).
5. A pipe system pressure test blind system according to claim 4, wherein, The first pipeline (3) is communicated with the second channel (212) at 0°; further comprising: A discharge pipe (7) is communicated with the second channel (212) at 180° at one end, the other end of the discharge pipe (7) is located outside the pipeline system (1), the discharge pipe (7) is used for discharging water for pressure test; A fifth valve (14) is arranged on the discharge pipe (7), the fifth valve (14) is used for controlling opening and closing of the discharge pipe (7).
6. A pipe system pressure test blind system according to claim 5, wherein, The external pipeline assembly (100) further comprises: A fourth pipeline (8) is communicated with the second channel (212) at 0° of the pressure test blind plate (2) at the highest point of the pipeline system (1) at one end, and the other end extends to the outside of the pipeline system (1); A second pressure gauge (20) is arranged on the other side of the fourth pipeline (8), the second pressure gauge (20) is used for displaying the pressure value of the pressure test blind plate (2) at the highest point An eighth valve (19) is arranged on the fourth pipeline (8).
7. A dismountable pressure test blind system for a pipe system according to claim 6, characterized in that The external pipeline assembly (100) further comprises: A fifth pipeline (9) is communicated with the second channel (212) at 180° of the pressure test blind plate (2) at the highest point of the pipeline system (1) at one end; A safety valve (18) is arranged at the other end of the fifth pipeline (9); A seventh valve (17) is arranged on the fifth pipeline (9).
8. A pipe system pressure test blind system according to claim 7, wherein, The first pipeline (3), the second pipeline (4), the third pipeline (5), the fourth pipeline (8), the fifth pipeline (9) and the discharge pipe (7) are all steel pipes.
9. A pipe system dismountable pressure test blind system according to claim 8, characterized in that Further comprising: A clamping sleeve joint (22) is arranged at the second channel (212) of the pressure test blind plate (2), the first pipeline (3), the discharge pipe (7), the fourth pipeline (8) and the fifth pipeline (9) are all communicated with the flow channel (201) of the pressure test blind plate (2) through the clamping sleeve joint (22).
10. A dismountable pressure test blind system for a pipe system according to claim 2, characterized in that The external pipeline assembly (100) further comprises: A third valve (16) is arranged on the second pipeline (4) close to the first pipeline (3) side.