A high-temperature and high-pressure test circuit specifically designed for a horizontally mounted main pump

Abstract

The present invention discloses a high-temperature and high-pressure test circuit for a horizontal main pump, comprising an outlet pipeline, an adjustment section pipeline, a vertical pipeline, a pressure tank, an inlet pipeline, and a water supply system. The outlet of the device to be tested is connected to the inlet of the pressure tank via the outlet pipeline, the adjustment section pipeline, and the vertical pipeline connected in sequence; the outlet of the pressure tank is connected to the inlet of the device to be tested via the inlet pipeline; a flow meter is provided between the connection of the outlet pipeline and the adjustment section pipeline; a first gate valve and a stop valve are provided in sequence between the connection of the adjustment section pipeline and the vertical pipeline; a second gate valve and a drain pipe are provided in sequence along the flow direction of the medium on the inlet pipeline; and the water supply system comprises a five-way pipe and two sets of high-pressure water supply pumps. The high-temperature and high-pressure test circuit for a horizontal main pump of the present invention has a simple structural principle, is easy to operate and maintain, is safe and reliable, has low operating cost, and is highly versatile. It can be used for performance and durability testing of horizontal main pump equipment.

Description

Technical Field

[0001] The invention relates to a high-temperature and high-pressure test circuit dedicated to a horizontally placed main pump. Background Art

[0002] There are many pumping equipment in the nuclear power field. For normal temperature and pressure or low-pressure pump groups, the test circuit construction is relatively simple. For pump equipment with high design temperature and high pressure, such as nuclear power primary, secondary, and tertiary horizontal main pump equipment, it is often difficult to conduct relevant performance tests and durability tests. There are also high-temperature test circuits, but the structure is extremely complex, the operating cost is extremely high, or the operating range is small, which makes it difficult to meet the needs of ordinary customers for related tests on pump equipment. In order to address the above disadvantages, it is necessary to build a high-temperature and high-pressure test circuit with a relatively simple structure, safety and reliability, and easy operation and maintenance to test the relevant performance of horizontal main pumps. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a high-temperature and high-pressure test circuit dedicated to a horizontal main pump. The circuit has a simple structural principle, is easy to operate and maintain, is safe and reliable, has low operating costs, and is highly versatile. It can be used for performance and durability tests of horizontal main pump equipment.

[0004] The technical solution to achieve the above purpose is: a high-temperature and high-pressure test circuit dedicated to a horizontal main pump, including an outlet pipeline, an adjustment section pipeline, a vertical pipeline, a pressure tank, an inlet pipeline and a water supply system, wherein:

[0005] The outlet of the device to be tested is connected to the inlet of the pressure tank through an outlet pipeline, an adjustment section pipeline and a vertical pipeline connected in sequence;

[0006] The outlet of the pressure tank is connected to the inlet of the device to be tested through an inlet pipeline;

[0007] A pressure ring and a medium compensation pipeline are sequentially arranged on the outlet pipeline along the medium flow direction, and an exhaust valve and a first pressure pipeline are arranged on the pressure ring;

[0008] A flow meter is provided between the connection point of the outlet pipeline and the adjustment section pipeline;

[0009] A first gate valve and a stop valve are sequentially provided between the connection points of the adjustment section pipeline and the vertical pipeline;

[0010] A second gate valve and a drain pipe are sequentially arranged on the inlet pipeline along the medium flow direction;

[0011] The water supply system includes a five-way pipe and two sets of high-pressure water supply pumps, wherein the two sets of high-pressure water supply pumps are connected to two interfaces of the five-way pipe through one-way valves; the other interface of the five-way pipe is connected to the medium compensation pipeline through a water supply stop valve; and the other interface of the five-way pipe is connected to the pressure tank;

[0012] The upper part of the pressure tank is provided with an exhaust pipeline, a second pressure-taking pipeline, a safety valve and a liquid level gauge, and the bottom of the pressure tank is provided with a pressure tank drainage pipeline; the outside of the pressure tank is connected to a pressure stabilizer.

[0013] In the above-mentioned high-temperature and high-pressure test circuit dedicated to a horizontally mounted main pump, the inlet of the pressure tank is located at the upper part of the pressure tank, and the outlet of the pressure tank is located at the lower part of the pressure tank.

[0014] The above-mentioned high-temperature and high-pressure test circuit dedicated to a horizontally mounted main pump, wherein the length of the vertical pipeline is greater than or equal to 15 times the diameter of the vertical pipeline.

[0015] In the above-mentioned high-temperature and high-pressure test circuit dedicated to a horizontally mounted main pump, the exhaust valve is arranged at the top end of the pressure-taking ring; and the first pressure-taking pipeline is connected to the side of the pressure-taking ring.

[0016] The above-mentioned high-temperature and high-pressure test circuit dedicated to a horizontal main pump, wherein the first pressure-taking pipeline adopts a DN15 pipeline, the first pressure-taking pipeline is externally connected to a pressure transmitter, and the distance between the pressure transmitter and the pressure ring is greater than 3m.

[0017] In the above-mentioned high-temperature and high-pressure test circuit dedicated to a horizontally mounted main pump, the flow meter is a flow meter with temperature and pressure compensation capabilities.

[0018] The above-mentioned high-temperature and high-pressure test circuit dedicated to a horizontally mounted main pump, wherein the adjustment section pipeline is used to adjust the axial dimensions when the entire high-temperature and high-pressure test circuit is constructed to ensure that the entire high-temperature and high-pressure test circuit is in a stress relaxation state.

[0019] The above-mentioned high-temperature and high-pressure test circuit dedicated to a horizontally mounted main pump, wherein the pressure tank is set on the ground through a support frame, and a universal ball that can roll freely is set at the bottom end of the support frame of the pressure tank.

[0020] In the above-mentioned high-temperature and high-pressure test circuit dedicated to a horizontally mounted main pump, both ends of the vertical pipeline are connected to the inlet and the adjustment section pipeline of the pressure tank in a one-to-one correspondence through elbows.

[0021] The above-mentioned high-temperature and high-pressure test circuit dedicated to a horizontally mounted main pump, wherein the lengths of the exhaust pipeline and the second pressure pipeline are respectively greater than 3m, and the exhaust pipeline and the second pressure pipeline are respectively U-shaped.

[0022] The high-temperature and high-pressure test circuit for a horizontally mounted main pump of the present invention can be used for performance and durability testing of horizontally mounted main pump equipment. Compared with the prior art, it has the following beneficial effects:

[0023] (1) The test circuit has a simple principle, is easy to operate, and has low production and maintenance costs;

[0024] (2) The combined structure of a free-sliding pressure tank and a long vertical pipe can fully absorb the deformation caused by the alternating hot and cold conditions of the pipeline, eliminating the need for expansion joints and ensuring safety and reliability.

[0025] (3) The main circuit adopts a gate valve and a stop valve in series design, which improves the stability of system operation, reduces the risk of leakage after frequent start and stop, and is easy to maintain, safe and reliable;

[0026] (4) There is no need to set up a cooling system. The system can achieve constant speed cooling operation by relying solely on natural cooling and alternating water supply and heat discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a high-temperature and high-pressure test circuit dedicated to a horizontally mounted main pump of the present invention;

[0028] Figure 2 This is a schematic diagram of the connection between the exhaust valve and the pressure ring;

[0029] Figure 3 It is a schematic diagram of the connection between the pressure taking pipeline and the pressure taking ring;

[0030] Figure 4 Schematic diagram of the water replenishment system structure. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the specific implementation methods thereof are described in detail below with reference to the accompanying drawings:

[0032] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The best embodiment of the present invention is a high-temperature and high-pressure test circuit dedicated to a horizontal main pump, including an outlet pipeline 2, an adjustment section pipeline 4, a vertical pipeline 7, a pressure tank 8, an inlet pipeline 11 and a water supply system 9.

[0033] The outlet of the device under test 1 is connected to the inlet of a pressure tank 8 via an outlet pipe 2, an adjustment section pipe 4, and a vertical pipe 7, which are connected in sequence. The outlet of the pressure tank 8 is connected to the inlet of the device under test 1 via an inlet pipe 11. The inlet of the pressure tank 8 is located at the top of the pressure tank, and the outlet of the pressure tank 8 is located at the bottom of the pressure tank.

[0034] A pressure ring 12 and a medium compensation pipeline 15 are arranged in sequence on the outlet pipeline 11 along the medium flow direction. An exhaust valve 13 and a first pressure pipeline 14 are provided on the pressure ring 12; the exhaust valve 13 is arranged at the top of the pressure ring 12, and the exhaust valve 13 assists in exhausting the entire test circuit; the first pressure pipeline 14 is connected to the side of the pressure ring 12 for pipeline pressure collection. The first pressure pipeline 14 adopts a DN15 pipeline. The first pressure pipeline 14 is externally connected to a pressure transmitter 100. In order to facilitate pressure collection and the installation and maintenance of the pressure transmitter, when the high-temperature and high-pressure circuit is built, the distance between the pressure transmitter 100 and the pressure ring 12 is greater than 3m, and the medium temperature here tends to normal temperature.

[0035] The medium compensation pipeline 15 is connected to the water supply system 9 through the water supply stop valve 16. The setting of the medium compensation pipeline 15 can not only improve the water supply capacity of the entire test circuit, but also quickly cool the device under test 1 when the main circuit valve is closed during maintenance of the entire test circuit.

[0036] The water supply system 9 includes a five-way pipe 19 and two groups of high-pressure water supply pumps 17. The two groups of high-pressure water supply pumps 17 are connected to the two interfaces of the five-way pipe 19 through a one-way valve 18. The other interface of the five-way pipe 19 is connected to the medium compensation pipeline 15 through the water supply stop valve 16. The other interface of the five-way pipe 19 is connected to the pressure tank 8. The high-pressure water supply pump 17 is mainly used to supply water to the entire test circuit through the five-way pipe 20. The two groups of high-pressure water supply pumps 17 can not only increase the water supply rate of the entire test circuit system, but also play a role in mutual replacement, preventing damage to a single high-pressure water supply pump and affecting equipment operation. The one-way valve 18 is mainly used to protect the high-pressure water supply pump 17.

[0037] A flowmeter 3 is installed between the outlet pipe 2 and the adjustment section pipe 4. This flowmeter features temperature and pressure compensation to ensure measurement accuracy. The adjustment section pipe 4 is used to adjust the axial dimensions of the entire high-temperature, high-pressure test circuit during construction, ensuring that the entire circuit remains in a stress-relaxed state.

[0038] A first gate valve 5 and a stop valve 6 are sequentially arranged between the connection of the adjustment section pipeline 4 and the vertical pipeline 7; the first gate valve 5 and the stop valve 6 are designed in series, and the first gate valve 5 is arranged at the front end of the stop valve 6. When the entire test circuit is operating normally, the first gate valve 5 is in a normally open state, and the operating flow of the entire test circuit is controlled by adjusting the stop valve 6. After the stop valve 6 is in operation, the sealing performance of the stop valve 6 will decrease due to the high pressure and wear of the entire test circuit. At this time, the setting of the first gate valve 5 can improve the sealing performance of the system, which is beneficial to the maintenance of the entire test circuit. When repairing and replacing the stop valve 6, the first gate valve 5 should be closed before repairing and maintaining it.

[0039] A second gate valve 10 and a drain pipe 26 are sequentially installed on the inlet pipe 11 along the flow direction of the medium. Second gate valve 10 is normally open. When the entire test circuit requires maintenance, second gate valve 10 is closed, eliminating the need for frequent openings and reducing valve wear. When the entire test circuit requires maintenance, all valves in the main circuit are closed, and the drain valve on drain pipe 26 is opened to drain the water. Simultaneously, the water supply shut-off valve 16 is slowly opened to quickly cool the medium temperature at the test end to room temperature, improving the safety of maintenance throughout the entire test circuit.

[0040] The upper portion of the pressure tank 8 is equipped with an exhaust line 20, a second pressure line 21, a safety valve 22, and a liquid level gauge 23. The exhaust line 20 is used to vent the pressure tank 8 during water filling, while the second pressure line 21 is used to test the pressure within the pressure tank 8. The safety valve 22 protects the pressure tank 8 from falling below the set pressure. To ensure safe and reliable operation and convenient operation of the exhaust line 20 and the second pressure line 21, the exhaust line 20 and the second pressure line 21 can each be set to a length of at least 3 meters (depending on the design temperature of the line), and each adopts a "U"-shaped design.

[0041] A pressure tank drainage pipe 25 is provided at the bottom of the pressure tank 8; a pressure stabilizer 24 is connected to the outside of the pressure tank 8 to ensure that the pressure of the pressure tank 8 does not change drastically when the equipment is running, thereby preventing the safety valve 22 from frequently tripping and protecting the equipment under test.

[0042] The pressure tank 8 is also provided with a heating device and a pressure tank drainage pipeline 25, and the high-temperature valves on the pressure tank 8 are all set as electric valves to avoid potential safety hazards caused by human contact.

[0043] The present invention provides a dedicated high-temperature and high-pressure test circuit for a horizontally mounted main pump. During installation, the device under test 1 is fixedly mounted, while the pressure tank 8 is slidably mounted. For example, the device under test 1 is fixed to the ground via a base, and the base of the device under test 1 is fixed to the ground in a fixed manner to prevent vibrations generated during operation. The pressure tank 8 is set on the ground via a support frame 81, and a freely rolling universal ball 82 is provided at the bottom end of the support frame 81 of the pressure tank 8. In this way, the thermal expansion energy of the pipeline pushes the pressure tank 8 to absorb the expansion amount and then slide freely. The two ends of the vertical pipeline 7 are respectively connected to the inlet and adjustment section pipeline 4 of the pressure tank 8 through elbows. The vertical pipeline 7 has the function of absorbing the thermal expansion and deformation of the system. When the high-temperature test circuit is operating, the thermal expansion and deformation difference generated by the inlet and outlet pipelines will be eliminated by the elastic deformation of the vertical pipeline 7, because under normal circumstances, the inlet and outlet pipelines of the device under test 1 have inconsistent structures and different thermal expansion amounts. Usually the length of the vertical pipeline 7 needs to be greater than or equal to 15 times the diameter of the vertical pipeline 7. The vertical pipeline 7 is longer and has greater deflection, which greatly reduces the large stress generated by thermal deformation of the system, replaces the high-pressure expansion joint and reduces the safety risks of the system.

[0044] The high-temperature and high-pressure test circuit dedicated to the horizontally mounted main pump of the present invention further requires a supporting device to fix and support various equipment and pipelines.

[0045] When the high-temperature and high-pressure test circuit dedicated to the horizontal main pump of the present invention is in use, the high-temperature and high-pressure medium in the pressure tank enters the device under test 1 from the outlet through the inlet pipe 11, and then enters the pressure tank through the outlet pipe 2, the adjustment section pipe 4 and the vertical pipe 7 in sequence, so that the performance and durability tests of the device under test 1 can be carried out.

[0046] The present invention's dedicated high-temperature, high-pressure test circuit for a horizontally mounted main pump eliminates the need for a separate cooling circuit. When cooling is required, the pressure tank's heating system can be turned off, and the drain valve on the pressure tank drain line 25 and the high-pressure make-up pump 17 of the water supply system 9 can be opened. Cold water is then directed through the five-way pipe 19 into the pressure tank 8, where it is thoroughly mixed. By controlling the water replenishment and drainage rates, the cooling rate of the equipment under test can be controlled.

[0047] In summary, the high-temperature and high-pressure test circuit dedicated to the horizontal main pump of the present invention has a simple structural principle, convenient operation and maintenance, safety and reliability, low operating cost, and strong versatility, and can be used for performance and durability tests of horizontal main pump equipment.

[0048] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A high-temperature and high-pressure test circuit dedicated to a horizontal main pump, characterized in that: It includes outlet pipeline, adjustment section pipeline, vertical pipeline, pressure tank, inlet pipeline and water supply system, including: The outlet of the device to be tested is connected to the inlet of the pressure tank through an outlet pipeline, an adjustment section pipeline and a vertical pipeline connected in sequence; The outlet of the pressure tank is connected to the inlet of the device to be tested through an inlet pipeline; A pressure ring and a medium compensation pipeline are sequentially arranged on the outlet pipeline along the medium flow direction, and an exhaust valve and a first pressure pipeline are arranged on the pressure ring; A flow meter is provided between the connection point of the outlet pipeline and the adjustment section pipeline; A first gate valve and a stop valve are sequentially provided between the connection points of the adjustment section pipeline and the vertical pipeline; A second gate valve and a drain pipe are sequentially arranged on the inlet pipeline along the medium flow direction; The water supply system includes a five-way pipe and two sets of high-pressure water supply pumps, wherein the two sets of high-pressure water supply pumps are connected to two interfaces of the five-way pipe through one-way valves; the other interface of the five-way pipe is connected to the medium compensation pipeline through a water supply stop valve; and the other interface of the five-way pipe is connected to the pressure tank; The upper part of the pressure tank is provided with an exhaust pipeline, a second pressure-taking pipeline, a safety valve and a liquid level gauge, and the bottom of the pressure tank is provided with a pressure tank drainage pipeline; the outside of the pressure tank is connected to a pressure stabilizer.

2. A high-temperature and high-pressure test circuit dedicated to a horizontal main pump according to claim 1, characterized in that: The inlet of the pressure tank is located at the upper part of the pressure tank, and the outlet of the pressure tank is located at the lower part of the pressure tank.

3. A high-temperature and high-pressure test circuit dedicated to a horizontal main pump according to claim 1, characterized in that: The length of the vertical pipeline is greater than or equal to 15 times the diameter of the vertical pipeline.

4. A high-temperature and high-pressure test circuit dedicated to a horizontal main pump according to claim 1, characterized in that: The exhaust valve is arranged at the top end of the pressure-taking ring; and the first pressure-taking pipeline is connected to the side of the pressure-taking ring.

5. A high-temperature and high-pressure test circuit dedicated to a horizontal main pump according to claim 1 or 4, characterized in that: The first pressure-taking pipeline adopts a DN15 pipeline, the first pressure-taking pipeline is externally connected to a pressure transmitter, and the distance between the pressure transmitter and the pressure-taking ring is greater than 3m.

6. A high-temperature and high-pressure test circuit dedicated to a horizontal main pump according to claim 1, characterized in that: The flow meter is a flow meter with temperature and pressure compensation capabilities.

7. A high-temperature and high-pressure test circuit dedicated to a horizontal main pump according to claim 1, characterized in that: The adjustment section pipeline is used for axial dimension adjustment when the entire high-temperature and high-pressure test circuit is constructed, ensuring that the entire high-temperature and high-pressure test circuit is in a stress relaxation state.

8. The high-temperature and high-pressure test circuit for a horizontal main pump according to claim 1, characterized in that: The pressure tank is arranged on the ground through a support frame, and a freely rolling universal ball is arranged at the bottom end of the support frame of the pressure tank.

9. The high-temperature and high-pressure test circuit for a horizontal main pump according to claim 1, characterized in that: Both ends of the vertical pipeline are connected to the inlet and the adjustment section pipeline of the pressure tank through elbows in a one-to-one correspondence.

10. A high-temperature and high-pressure test circuit dedicated to a horizontal main pump according to claim 1, characterized in that: The lengths of the exhaust pipeline and the second pressure-taking pipeline are respectively greater than 3 m, and the exhaust pipeline and the second pressure-taking pipeline are respectively U-shaped.

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