Performance test device for water hammer protection facility

Abstract

The utility model relates to a water hammer protection facility performance test device, which comprises a first pressure tank, a first pipe connecting part, a second pipe connecting part, a hydraulic sensor, a first air pressure sensor and a liquid level meter, and is characterized in that the top and the bottom of the first pressure tank are respectively provided with an opening; the first pipe connecting part comprises a first pipeline, a ball valve and a fluid flowmeter, one end of the first pipeline is communicated with a bottom opening of the first pressure tank, the other end of the first pipeline is communicated with an external water supply pipeline, and the ball valve and the fluid flowmeter are arranged on the first pipeline; the second pipe connecting part comprises a second pipeline and a gate valve, the second pipeline is communicated with the top opening of the first pressure tank, and the gate valve is arranged on the second pipeline; the hydraulic sensor, the first air pressure sensor and the liquid level meter are arranged on the first pressure tank. The water hammer protection facility performance test device can simulate various water hammer working conditions, so that performance tests of various water hammer protection facilities are carried out, and accurate evaluation of the performance of the water hammer protection facilities is realized.

Description

Technical Field

[0001] The present application relates to the technical field of water conservancy and hydropower engineering, and in particular to a water hammer protection facility performance test device. Background Art

[0002] Water hammer is a common phenomenon in water conservancy and hydropower projects, which may cause damage to equipment such as pipes, valves, and pumps. In order to deal with this problem, water hammer protection equipment is widely used. However, there are many types of existing water hammer protection equipment, and the performance of various equipment is also different. At present, there is no mature equipment and method to carry out performance testing for water hammer protection equipment, which is difficult to meet the needs of equipment testing. Utility Model Content

[0003] A first aspect of an embodiment of the present application provides a water hammer protection facility performance test device, which can simulate a variety of water hammer conditions, thereby performing performance tests on a variety of water hammer protection equipment and achieving accurate evaluation of the performance of the water hammer protection equipment.

[0004] The water hammer protection facility performance test device provided in the first aspect of the embodiment of the present application includes:

[0005] A first pressure tank, wherein the top and the bottom of the first pressure tank are respectively provided with openings;

[0006] a first pipe connection portion, the first pipe connection portion comprising a first pipe, a ball valve and a liquid flow meter, one end of the first pipe being in communication with a bottom opening of the first pressure tank, and the other end being in communication with an external water supply pipeline, the ball valve and the liquid flow meter being arranged on the first pipe;

[0007] a second pipe connection portion, the second pipe connection portion comprising a second pipe and a gate valve, the second pipe being communicated with the top opening of the first pressure tank, and the gate valve being arranged on the second pipe;

[0008] A hydraulic pressure sensor, a first air pressure sensor and a liquid level gauge, wherein the hydraulic pressure sensor, the first air pressure sensor and the liquid level gauge are arranged in the first pressure tank.

[0009] In addition, the water hammer protection facility performance test device provided in the embodiment of the present application may also have the following additional technical features:

[0010] In an optional scheme, the water hammer protection facility performance test device also includes a second pressure tank and a third pipe connection part, the second pressure tank is connected to the first pressure tank through the second pipe; the third pipe connection part includes a third pipe and a second manual valve, the third pipe is located on the upper middle side wall of the first pressure tank, and the third pipe is connected to the first pressure tank, and the second manual valve is arranged on the third pipe.

[0011] In an optional solution, an air valve and a gas flow meter are further provided on the second pipeline; a second air pressure sensor and a fourth pipeline are provided on the second pressure tank, and a first manual valve is provided on the fourth pipeline.

[0012] A second aspect of the present application provides a test method for a water hammer protection facility performance test device, which is used to perform a hydraulic performance test on an air tank. The water hammer protection facility performance test device is the water hammer protection facility performance test device in the first aspect of the present application. The test method comprises the following steps:

[0013] 1) Close the gate valve at the top of the first pressure tank;

[0014] 2) Open the ball valve, the external water supply pipeline starts to supply water, the water level in the first pressure tank rises, and the gas is compressed until the water level stabilizes, and the first pressure tank forms an air tank to prevent water hammer;

[0015] 3) The external water supply pipeline is suddenly stopped from supplying water, and the flow rate change Q1(t) during the test is measured by the liquid flow meter, and the water pressure change P in the tank during the test is measured by the hydraulic sensor. w1 (t), the pressure change P in the tank during the test is measured by the first pressure sensor A1 (t), the water level change H1(t) in the tank during the test is measured by the level gauge;

[0016] 4) According to the measured Q1(t), P w1 (t), P A1 (t) and H1(t) are used to analyze the water hammer protection effect of the air tank.

[0017] In an optional solution, the following steps are further included between step 1) and step 2):

[0018] First, open the second manual valve to pressurize the gas into the first pressure tank, and then conduct a comparative test on the water hammer protection effect of the air tank under different gas volume and water level parameters.

[0019] A third aspect of the present application provides a test method for a water hammer protection facility performance test device, which is used to perform a performance test on an air valve. The water hammer protection facility performance test device is the water hammer protection facility performance test device in the first aspect of the present application. The test method comprises the following steps:

[0020] 1) Open the gate valve on the top of the first pressure tank and close the second manual valve;

[0021] 2) Open the first manual valve;

[0022] 3) Open the ball valve, the external water supply pipeline starts to supply water, and the first air pressure sensor measures the change in water pressure in the tank during the test.A1 (t), the exhaust flow rate change Q during the test is measured by the gas flow meter A1 (t);

[0023] 4) The water level in the first pressure tank rises to the top of the tank, the exhaust port of the air valve is closed, and the change in the trace exhaust flow rate Q during the test is measured by the gas flow meter. A2 (t);

[0024] 5) The external water supply pipeline suddenly stops supplying water, the pressure drops, and the pressure change P in the tank during the test is measured. A3 (t), the exhaust flow rate change Q during the test is measured by the gas flow meter A3 (t); When the water hammer wave is reflected, the pressure rises, and the pressure change P in the tank during the test is measured by the first pressure sensor A4 (t), the exhaust flow rate change Q during the test is measured by the gas flow meter A4 (t);

[0025] 6) Based on the measured Q A1 (t), P A1 (t), Q A2 (t), P A3 (t), Q A3 (t), P A4 (t) and Q A4 (t) Analyze the air tank’s intake and exhaust characteristics during the water filling process and water hammer protection process.

[0026] In an optional solution, the step 2) can be replaced by the following steps:

[0027] The first manual valve is opened, pressurized gas is added to the second pressure tank, the first manual valve is closed, and then a comparative test of air intake and exhaust characteristics of the air valve under different air pressures is performed.

[0028] A fourth aspect of the present application provides a test method for a water hammer protection facility performance test device for performing a performance test on a surge tower. The water hammer protection facility performance test device is the water hammer protection facility performance test device in the first aspect of the present application embodiment. The test method comprises the following steps:

[0029] 1) Open the gate valve on the top of the first pressure tank and close the second manual valve;

[0030] 2) Open the first manual valve to connect the second pressure tank to the external atmosphere;

[0031] 3) Open the ball valve, the external water supply pipeline starts to supply water, and the pressure of the external water supply pipeline is controlled to prevent the water level in the first pressure tank from rising to the top and triggering the air valve;

[0032] 4) The external water supply pipeline suddenly stops supplying water, and the flow rate change Q1(t) during the test is measured by the liquid flow meter, and the water pressure change P in the tank during the test is measured by the hydraulic sensor w1 (t), the water level change H1(t) in the tank during the test is measured by the level gauge;

[0033] 5) According to Q1(t), P w1 (t), H1(t) analyze the water hammer protection characteristics of the pressure regulating tower.

[0034] The beneficial effects of the embodiments of the present application are:

[0035] The water hammer protection facility performance test device and test method in the embodiments of the present application can perform performance tests on a variety of water hammer protection equipment with a set of equipment, avoiding the need to separately arrange various water hammer protection equipment and various measuring instruments in a large area, saving test costs and improving test efficiency to a certain extent.

[0036] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the overall structure of the water hammer protection facility performance test device provided in this application.

[0038] Figure numerals: first pressure tank 1, first pipeline 2, ball valve 3, liquid flow meter 4, external water supply pipeline 5, second pipeline 6, gate valve 7, hydraulic sensor 8, first air pressure sensor 9, liquid level meter 10, second pressure tank 11, third pipeline 12, second manual valve 13, air valve 14, gas flow meter 15, second air pressure sensor 16, fourth pipeline 17, first manual valve 18.

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0040] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0041] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0042] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0043] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0045] A first aspect of an embodiment of the present application provides a water hammer protection facility performance test device, which can simulate a variety of water hammer conditions, thereby performing performance tests on a variety of water hammer protection equipment and achieving accurate evaluation of the performance of the water hammer protection equipment.

[0046] like Figure 1 As shown, the water hammer protection facility performance test device mainly includes a first pressure tank 1, a first pipe connection part, a second pipe connection part, a hydraulic sensor 8, a first air pressure sensor 9 and a liquid level meter 10, wherein the top and bottom of the first pressure tank 1 are respectively provided with openings; the first pipe connection part includes a first pipeline 2, a ball valve 3 and a liquid flow meter 4, one end of the first pipeline 2 is connected to the bottom opening of the first pressure tank 1, and the other end is connected to the external water supply pipeline 5, and the ball valve 3 and the liquid flow meter 4 are arranged in the first pipeline 2; the second pipe connection part includes a second pipeline 6 and a gate valve 7, the second pipeline 6 is connected to the top opening of the first pressure tank 1, and the gate valve 7 is arranged in the second pipeline 6; the hydraulic sensor 8, the first air pressure sensor 9 and the liquid level meter 10 are arranged in the first pressure tank 1.

[0047] like Figure 1As shown, in a specific embodiment, the water hammer protection facility performance test device also includes a second pressure tank 11 and a third pipe connection part, the second pressure tank 11 is connected to the first pressure tank 1 through a second pipe 6; the third pipe connection part includes a third pipe 12 and a second manual valve 13, the third pipe 12 is located on the middle and upper side wall of the first pressure tank 1, and the third pipe 12 is connected to the first pressure tank 1, and the second manual valve 13 is arranged on the third pipe 12.

[0048] like Figure 1 As shown, in a specific embodiment, an air valve 14 and a gas flow meter 15 are further provided on the second pipeline 6 ; a second air pressure sensor 16 and a fourth pipeline 17 are provided on the second pressure tank 11 , and a first manual valve 18 is provided on the fourth pipeline 17 .

[0049] In this embodiment, the switch of the ball valve 3 realizes the filling and draining of the first pressure tank 1 by the external water supply pipeline 5; the flow rate can be measured by the liquid flow meter 4, and the switch of the gate valve 7 can control whether the first pressure tank 1 is connected to the air valve 14. In addition, the hydraulic sensor 8 is used to measure the real-time liquid pressure in the tank, the first air pressure sensor 9 is used to measure the real-time gas pressure in the tank, the liquid level meter 10 is used to observe the real-time water level in the tank, and the second air pressure sensor 16 arranged at the upper opening of the second pressure tank 11 is used to measure the real-time gas pressure in the tank. The first manual valve 18 is used to control the second pressure tank 11 to be connected to the external atmosphere, and an external air compressor can also be connected to pressurize the second pressure tank 11. When the second manual valve 13 is opened, the external air compressor can be used to pressurize the first pressure tank 1.

[0050] like Figure 1 As shown, the water hammer protection facility performance test device in the first aspect of the embodiment can be used to perform a hydraulic performance test on an air tank, and the specific test method includes the following steps:

[0051] 1) Close the gate valve 7 at the top of the first pressure tank 1;

[0052] 2) Open the ball valve 3, the external water supply pipeline 5 starts to supply water, the water level in the first pressure tank 1 rises, the gas in the tank cannot be discharged, and is compressed to form high pressure. When the water pressure is the same as the gas pressure, the water level remains unchanged, and the first pressure tank 1 stores high-pressure gas and liquid, which has the same principle and function as the anti-water hammer air tank, that is, the first pressure tank 1 forms an anti-water hammer air tank;

[0053] 3) The external water supply pipeline 5 suddenly stops supplying water, the pressure drops, and a negative water hammer is formed. The first pressure tank 1 replenishes water to the external water supply pipeline 5, and the water level in the tank drops. When the water hammer wave is reflected, the pressure rises, and the water level in the tank rises. Then, the flow rate change Q1(t) during the test process is measured by the liquid flow meter 4, and the water pressure change P in the tank during the test process is measured by the hydraulic sensor 8. w1(t), the pressure change P in the tank during the test is measured by the first pressure sensor 9 A1 (t), the water level change H1(t) in the tank during the test is measured by the liquid level meter 10;

[0054] 4) According to the measured Q1(t), P w1 (t), P A1 (t) and H1(t) are used to analyze the water hammer protection effect of the air tank.

[0055] In a specific embodiment, the following steps are also included between step 1) and step 2):

[0056] First, open the second manual valve 13 and connect an external air compressor to pressurize the gas into the first pressure tank 1. In this step, the first pressure tank 1 is pressurized. After the tank is filled with water, the gas volume and water level change, so that a comparative test of the water hammer protection effect of the air tank under different gas volume, water level and other parameters can be carried out.

[0057] like Figure 1 As shown, the water hammer protection facility performance test device in the first aspect of the embodiment can also be used to perform a performance test of the air valve 14. The specific test method includes the following steps:

[0058] 1) Open the gate valve 7 at the top of the first pressure tank 1 and close the second manual valve 13;

[0059] 2) Open the first manual valve 18, the second pressure tank 11 is connected to the external atmosphere, and the pressure inside the tank is atmospheric pressure;

[0060] 3) Open the ball valve 3, the external water supply pipeline 5 starts to supply water, the water level in the first pressure tank 1 rises, the gas in the tank flows to the second pressure tank 11 through the air valve 14, and then flows to the atmosphere through the pipeline and the first manual valve 18, thereby forming a large amount of exhaust test of the air valve 14, and then the first air pressure sensor 9 measures the water pressure change P in the tank during the test process. A1 (t), the exhaust flow rate change Q during the test process is measured by the gas flow meter 15 A1 (t);

[0061] 4) The water level in the first pressure tank 1 rises to the top of the tank body, the exhaust port of the air valve 14 is closed, and the residual gas in the tank can be discharged through the trace exhaust port. The change Q of the trace exhaust flow rate during the test is measured by the gas flow meter 15. A2 (t);

[0062] 5) The external water supply pipeline 5 suddenly stops supplying water, the pressure drops, and a negative water hammer is formed. The first pressure tank 1 replenishes water to the external water supply pipeline 5, and then the first air pressure sensor 9 can measure the pressure change P in the tank during the test. A3 (t), the exhaust flow rate change Q during the test process is measured by the gas flow meter 15A3 (t); When the water hammer wave is reflected, the pressure rises, and the pressure change P in the tank during the test is measured by the first pressure sensor 9 A4 (t), the exhaust flow rate change Q during the test process is measured by the gas flow meter 15 A4 (t);

[0063] 6) Based on the measured Q A1 (t), P A1 (t), Q A2 (t), P A3 (t), Q A3 (t), P A4 (t) and Q A4 (t) Analyze the air tank’s intake and exhaust characteristics during the water filling process and water hammer protection process.

[0064] In a specific embodiment, step 2) can be replaced by the following steps:

[0065] Open the first manual valve 18 and connect an external air compressor to pressurize the gas into the second pressure tank 11, and then close the first manual valve 18 to form a certain initial pressure. This step pressurizes the second pressure tank 11. The pressure inside the tank is higher than the atmospheric pressure, so a comparative test of the intake and exhaust characteristics of the air valve 14 under different air pressures can be carried out.

[0066] like Figure 1 As shown, the water hammer protection facility performance test device in the first aspect of the embodiment can also be used to perform a performance test of a surge tower. The specific test method includes the following steps:

[0067] 1) Open the gate valve 7 at the top of the first pressure tank 1 and close the second manual valve 13;

[0068] 2) Open the first manual valve 18 so that the second pressure tank 11 is connected to the external atmosphere and the pressure inside the tank is atmospheric pressure;

[0069] 3) Open the ball valve 3, the external water supply pipeline 5 starts to supply water, the water level in the first pressure tank 1 rises, the gas in the tank flows to the second pressure tank 11 through the air valve 14, and then flows to the atmosphere through the pipeline and the first manual valve 18, and the pressure of the external water supply pipeline 5 is controlled to prevent the water level in the first pressure tank 1 from rising to the top and triggering the air valve 14. At this time, the upper part of the first pressure tank 1 is atmospheric pressure, and the lower part is water, which is consistent with the type of a pressure regulating tower;

[0070] 4) The external water supply pipeline 5 suddenly stops supplying water, and the pressure drops to form a negative water hammer. The first pressure tank 1 replenishes water to the external water supply pipeline 5, and the water level in the tank drops. When the water hammer wave is reflected, the pressure rises, and the water level in the tank rises. Then, the flow change Q1(t) during the test process is measured by the liquid flow meter 4, and the water pressure change P in the tank during the test process is measured by the hydraulic sensor 8.w1 (t), the water level change H1(t) in the tank during the test is measured by the liquid level meter 10;

[0071] 5) According to Q1(t), P w1 (t), H1(t) analyze the water hammer protection characteristics of the pressure regulating tower.

[0072] The water hammer protection facility performance test device and test method in the embodiments of the present application can perform performance tests on a variety of water hammer protection equipment with a set of equipment, avoiding the need to separately arrange various water hammer protection equipment and various measuring instruments in a large area, saving test costs and improving test efficiency to a certain extent.

[0073] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A water hammer protection facility performance test device, characterized in that: include: A first pressure tank, wherein the top and the bottom of the first pressure tank are respectively provided with openings; a first pipe connection portion, the first pipe connection portion comprising a first pipe, a ball valve and a liquid flow meter, one end of the first pipe being in communication with a bottom opening of the first pressure tank, and the other end being in communication with an external water supply pipeline, the ball valve and the liquid flow meter being arranged on the first pipe; a second pipe connection portion, the second pipe connection portion comprising a second pipe and a gate valve, the second pipe being communicated with the top opening of the first pressure tank, and the gate valve being arranged on the second pipe; A hydraulic pressure sensor, a first air pressure sensor and a liquid level gauge, wherein the hydraulic pressure sensor, the first air pressure sensor and the liquid level gauge are arranged in the first pressure tank.

2. The water hammer protection facility performance test device according to claim 1 is characterized in that: It also includes a second pressure tank and a third pipe connection part, the second pressure tank is connected to the first pressure tank through the second pipe; the third pipe connection part includes a third pipe and a second manual valve, the third pipe is located on the upper middle side wall of the first pressure tank, and the third pipe is connected to the first pressure tank, and the second manual valve is arranged on the third pipe.

3. The water hammer protection facility performance test device according to claim 2 is characterized in that: The second pipeline is also provided with an air valve and a gas flow meter; the second pressure tank is provided with a second air pressure sensor and a fourth pipeline, and the fourth pipeline is provided with a first manual valve.

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