CN110208103B - Pressure vessel hydrostatic test connection control device and method - Google Patents
Pressure vessel hydrostatic test connection control device and method Download PDFInfo
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- CN110208103B CN110208103B CN201910542984.9A CN201910542984A CN110208103B CN 110208103 B CN110208103 B CN 110208103B CN 201910542984 A CN201910542984 A CN 201910542984A CN 110208103 B CN110208103 B CN 110208103B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
- F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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Abstract
The invention provides a device and a method for connection control of a hydraulic test of a pressure container. The device includes: the water pump assemblies are connected in parallel, power is provided after the water pump assemblies are electrified, test water is pressurized, and then the pressurized test water is injected into the connecting assembly through the high-pressure hose; the movable plate trailer can move and turn under the action of external force, and the upper end of the movable plate trailer is fixedly connected with the water pump assembly so as to slow down the vibration generated when the water pump assembly works; and the connecting assembly is arranged on one side of the movable plate trailer and used for injecting the water for the pressurization test injected by the water pump assembly into the pressure container to be detected through the high-pressure hose. The device and the method can meet the requirement of the pressure rise rate of the hydrostatic test of the ultra-large volume pressure container, and are suitable for pressure containers of various models. Through setting up two sets of water pump assembly, realize that the water pump is used one and is equipped with one in the hydrostatic test, improved the operational safety nature.
Description
Technical Field
The invention relates to the field of hydraulic test equipment, in particular to a connection control device and method for a hydraulic test of a pressure container.
Background
Before a pressure container product, particularly a pressure container for nuclear power equipment leaves a factory, a hydraulic test needs to be carried out, and the purpose is to test the strength and the tightness of a pressure-bearing part of the pressure container. In the test process, whether the pressure container has the necessary pressure-bearing capacity is verified by observing whether the pressure-bearing member is obviously deformed or broken. Meanwhile, the tightness of the pressure container is checked by observing whether the joints such as welding seams, flanges and the like have leakage or not.
Due to the diversity of products, the requirements of the hydrostatic test pressure increasing rate of different pressure container products are different. Generally, the highest pressure rise rate of the hydrostatic test is higher than the set pressure resistance value of the pressure vessel to be tested. For pressure vessels, the rate of pressure rise in a hydrostatic test is very important: when the pressure raising rate is too low, the pressure test time is too long, the pressure container can be irreversibly damaged, the hydrostatic test can be inaccurate, and the like; when the pressure rise rate is too high, the pressure vessel is damaged by violent impact on the pressure vessel in a short time, and the safety of operators in the hydraulic test is also influenced.
Because the highest pressure of the hydrostatic test is higher than the set pressure resistance value of the pressure vessel to be detected, the safety and the reliability of the pressure vessel can be influenced by the hydrostatic test for many times. In order to ensure the safety and reliability of the pressure container, the pressure container can only be subjected to one-time hydrostatic test, so that the hydraulic test is required and important to be completed at one time.
In addition, due to the uncertainty of the hydraulic test detection process, in order to ensure the safety of operators and related equipment, the test device and the operators should be away from the pressure vessel for a certain distance during the hydraulic test.
In order to ensure the one-time completion and the pressure increasing rate requirement of the hydrostatic test of a pressure container product with an ultra-large volume (the water capacity is more than 300 tons), and simultaneously meet the requirement of a hydrostatic test regulation on a safe distance, the research is carried out on the basis of the prior art, and the connection control device for the hydrostatic test of the pressure container is provided to solve the problems.
Disclosure of Invention
In order to solve the above problems, the present inventors have conducted intensive studies and, as a result, have found that: the two groups of water pump assemblies are connected in parallel through the connecting assembly to provide test water with high flow and high lift-up rate, and the water pump assemblies are fixedly arranged on the mobile plate trailer to reduce vibration of the water pump assemblies during working; after the two groups of water pump assemblies are connected through the three-way joint, the high-pressure hose connected with the middle joint is connected to a container needing a hydrostatic test, and therefore the invention is completed.
The object of the present invention is to provide the following:
in a first aspect, the present invention provides a hydraulic test connection control device for a pressure vessel, comprising:
the water pump assemblies are connected in parallel, power is provided after the water pump assemblies are electrified, test water is pressurized and then is injected into the connecting assembly through the high-pressure hose 6;
the movable plate trailer 11 can move and turn under the action of external force, and the upper end of the movable plate trailer 11 is fixedly connected with the water pump assembly so as to slow down the vibration generated when the water pump assembly works; and the number of the first and second groups,
and the connecting component is arranged on one side of the movable plate trailer 11, and is used for injecting the water for the pressurization test, which is injected by the water pump component, into the pressure container to be detected through the high-pressure hose 6.
The water pump assembly comprises a motor 1, a belt 2, a water pump 7 and an electric cabinet 4;
wherein, an electric control element connected with the motor 1 and the water pump 7 is arranged in the electric cabinet 4, and the motor 1 and the water pump 7 are controlled to work or stop by electrifying or powering off the electric control element in the electric cabinet 4;
the motor 1 is connected with one end of the belt 2, and provides rotating power for the belt 2 after the motor 1 is electrified;
the other end of the belt 2 is connected with a water pump 7, the water pump 7 is powered by the rotation of the belt 2, and test water entering the water pump is pressurized by the water pump 7 and then is injected into the pressure container through a high-pressure hose 6.
Preferably, the highest pressure of the water pump 7 is 30 MPa;
the injection flow rate of the water pump 7 is 1200L/h at most.
The connecting assembly comprises a throttling pressure regulating valve 9, a stop valve 3 and a three-way joint 5, and guides and connects a high-pressure hose 6;
the throttling pressure regulating valve 9 is connected with the stop valve 3 through a high-pressure hose 6;
the stop valve 3 is connected with two opposite joints in the three-way joint 5, and the middle joint of the three-way joint 5 is connected with a pressure container to be detected.
Preferably, the stop valve 3 and the three-way joint 5 are fixedly arranged on the top plane of the fixed bracket 17;
the fixed bracket 17 is arranged on the movable plate trailer 11 of any one of the two groups of water pump assemblies and is arranged on one side close to the other group of water pump assemblies.
Preferably, the fixing bracket 17 is disposed at one side of the water pump 7 and near the motor 1.
Wherein, the lower end of the movable plate trailer 11 is provided with a roller with a brake;
the water pump assembly is fixedly connected to the upper end face of the movable plate trailer 11 in a threaded connection or welding mode.
Preferably, the water pump 7 is further provided with a high-pressure unloading valve 10, and the pressure of the test water is reduced by reducing the pressure in the water pump 7 when the high-pressure unloading valve 10 is started.
In a second aspect, the invention provides a control method of the above-mentioned hydraulic test connection control device for a pressure vessel, the method comprising the following steps:
placing the two groups of water pump assemblies at proper positions, and connecting a throttling pressure regulating valve 9, a stop valve 3 and a three-way joint 5 by using a high-pressure hose 6 to connect the water pump assemblies in parallel; connecting the three-way joint 5 with a pressure container to be detected by using a high-pressure hose 6;
when the pressure vessel to be detected is subjected to a hydrostatic test:
opening a stop valve 3 connected with the three-way joint 5, throttle pressure regulating valves 9 of the two groups of water pump assemblies and a high-pressure unloading valve 10 of the water pump 7, starting the motor 1 and performing boosting operation;
during the pressure increasing operation, the high-pressure unloading valve 10 is closed firstly, then the throttling pressure regulating valve 9 is closed slowly, at the moment, the pressure in the pressure container to be detected gradually rises, and after the set test pressure is reached, the throttling pressure regulating valve 9 is opened, and the system is in an automatic pressure maintaining state;
after the pressure maintaining is finished, the high-pressure unloading valve 10 is opened to unload the pressure in the pressure container, and the hydraulic pressure test is finished.
Furthermore, when the two groups of water pump assemblies are used for carrying out a hydrostatic test in a one-to-one standby mode, any water pump assembly is set as a working pump set;
opening a stop valve 3, a throttling pressure regulating valve 9 and a high-pressure unloading valve 10 of a working pump group;
and closing the stop valve 3, the throttling pressure regulating valve 9 and the high-pressure unloading valve 10 of the other water pump assembly.
According to the connecting device and the control method for the hydraulic pressure test of the pressure container, provided by the invention, the following beneficial effects are achieved:
(1) when the connection control device and the control method for the hydraulic pressure test of the pressure container are used for carrying out the hydraulic pressure test on the pressure container, two groups of water pump assemblies can be used and prepared;
(2) when the connection control device and the control method for the hydraulic pressure test of the pressure container are used for performing the hydraulic pressure test on the pressure container with the ultra-large volume, the flow of the two groups of water pump assemblies can be completely output to the pressure container, so that the connection control device can meet the hydraulic pressure test requirements of the pressure containers with different models.
(3) In the connection control device and the control method for the hydraulic pressure test of the pressure container, the distance between the connection control device for the hydraulic pressure test of the pressure container and the pressure container is 20-25 m, so that the requirement of safe operation is met.
Drawings
FIG. 1 is a schematic structural diagram of a hydraulic test connection control device of a pressure vessel in a preferred embodiment;
fig. 2 shows a schematic side view of a preferred embodiment of a hydrostatic test connection control for a pressure vessel.
The reference numbers illustrate:
1-electric machine
2-leather belt
3-stop valve
4-electric cabinet
5-three way connection
6-high pressure hose
7-Water Pump
8-water inlet pipe
9-throttling pressure regulating valve
10-high pressure unloading valve
11-moving plate vehicle
17-fixed support
Detailed Description
The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention, as illustrated in the accompanying drawings.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left" and "right" and the like indicate orientations or positional relationships based on an operating state of the present invention, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and operation, and thus, should not be construed as limiting the present invention.
The present invention is described in detail below.
The invention provides a hydraulic test connection control device for a pressure vessel, which comprises a water pump assembly and a water injection pipe, wherein the water pump assembly is used for pressurizing test water and then injecting the test water into the pressure vessel.
The test water is water which can be injected into the pressure container and meets the hydraulic test requirement of the pressure container, and the water has specific requirements on hardness, ion quantity, oxygen content and the like. Different pressure vessel hydrostatic tests may have different requirements on test water, and the test water only needs to meet the requirements of the hydrostatic test of the pressure vessel to be detected, and the specific quality of the test water is not limited herein.
The water pump assembly comprises a motor 1, a belt 2, a water pump 7 and an electric cabinet 4.
The electric cabinet 4 is internally provided with an electric control element connected with the motor 1 and the water pump 7, and the motor 1 and the water pump 7 are controlled to work or stop by electrifying or powering off the electric control element in the electric cabinet 4.
The motor 1 is connected with one end of the belt 2, and provides rotating power for the belt 2 after the motor 1 is electrified.
The other end of the belt 2 is connected with a water pump 7, the water pump 7 is powered under the driving of the rotation of the belt 2, and test water entering the water pump is pressurized by the water pump 7 and then is injected into the pressure container through a water injection pipe.
Researches show that when the water pump assembly is used for carrying out a hydrostatic test, the water injection time is too long, and the pressurizing rate cannot meet the set requirement of a pressure container to be detected, namely, the working power and the maximum working pressure of the water pump assembly are improved, and the requirement cannot be met, particularly when a pressure container with an ultra-large volume (water capacity of more than 300 tons) is detected, the water pump assembly in the prior art can hardly meet the requirement of the hydrostatic test of the pressure container.
In the hydraulic test, based on the maximum volume of a pressure vessel of nuclear power equipment in the prior art, the highest pressure rise rate of the hydraulic test is generally not higher than 36 MPa/h. Generally, the larger the volume of the pressure vessel, the higher the rate of pressure rise in the hydrostatic test.
The water pressure of the pressure container in the hydraulic test is usually increased by injecting water into the pressure container through the water pump assembly. Research shows that the increase of the pressure boosting rate in the hydrostatic test is limited by the water injection flow rate of the water pump assembly. Therefore, the pressure container hydrostatic test connection control device provided by the invention particularly comprises two groups of water pump assemblies connected in parallel, after the water pump assemblies are electrified, water is injected into the pressure container to be detected and pressurized together to carry out hydrostatic test, and the hydrostatic test requirements of the pressure container, particularly the ultra-large volume pressure container, can be smoothly completed.
In order to meet the requirement of the pressure boosting rate of the hydrostatic test of the ultra-large volume pressure container, the water pump 7 is a high-pressure water pump. Preferably, the maximum pressure of the water pump 7 is 30MPa, which meets the requirement of the pressure increasing rate of most pressure vessels in the prior art, especially the requirement of the hydraulic test of the ultra-large volume pressure vessel.
Further, the maximum injection flow rate of the water pump 7 is 1200L/h, and the pressurizing time can be obviously reduced when water is injected into a pressure vessel, particularly an ultra-large volume pressure vessel.
Accordingly, in order to drive the water pump 7 to work at a high speed, the power of the motor 1 is often too large to meet the use requirement, for example, the power of the motor 1 is not less than 30 KW.
The hydraulic test connection control device for the pressure container is suitable for the pressure containers with various specifications, and is particularly suitable for the hydraulic test of the pressure container with the ultra-large volume. The water pump assembly that the parallelly connected setting not only satisfies the demand of the rate of stepping up when hydrostatic test, can also be when only using a water pump assembly to carry out hydrostatic test, and another water pump assembly is as reserve subassembly, makes this connecting device carry out hydrostatic test's security and reliability through the dual fail-safe and show the promotion.
In the connection control device, since there are many components in the water pump assembly and the quality is large, it is very difficult to move. The larger the volume and mass of the pressure vessel, the impractical to move the pressure vessel to complete the hydrostatic test.
In order to achieve an easy movement of the water pump assembly, the water pump assembly is preferably mounted on a freely movable device, the movement of which drives the movement of the water pump assembly.
In a preferred embodiment, as shown in fig. 2, the water pump assembly is connected to the upper end of the mobile cart 11, and the movement of the water pump assembly is realized by the displacement of the mobile cart 11. The mobile board trolley 11 may be provided with various types of devices capable of moving under the action of external force.
Preferably, the mobile plate trailer 11 comprises a plate capable of supporting the water pump assembly, the plate having a thickness and mechanical strength capable of supporting the water pump assembly at its upper end. The support plate of the mobile plate trailer 11 is preferably made of metal so as to provide on its upper face fastening means for fixing the water pump assembly, such as threaded holes for fixing bolts, welding elements for welding the water pump assembly, etc.
In research, the water pump assembly is found to vibrate in a manner that the vibration of the motor 1, the belt 2 and other components can drive the whole water pump assembly to vibrate when the water pump assembly works, so that a water injection pipe connected with the water pump assembly is also shaken. The connection between the water injection pipe and the water pump assembly is loosened in the working state, the shaking of test water in the water injection pipe is driven, and the connection between the water injection pipe and the water pump assembly is further deteriorated due to the further loosening; importantly, unstable water pressure in the test water during the surge condition can affect the measurement of the rate of pressure rise and potentially compromise the safety of the pressure vessel.
Preferably, the water pump assembly is fixedly connected to the upper end surface of the movable plate trailer 11, preferably by screwing or welding.
Through the fixed connection, the support plate of the movable plate trailer 11 can absorb part of vibration caused by the water pump assembly, and the vibration amplitude of the water pump assembly is reduced.
Optionally, in order to better reduce the vibration, a flexible material, such as cotton cloth, sponge and the like, can be arranged below the water pump assembly and in contact with the supporting plate, so as to reduce the vibration caused by the direct contact of the water pump assembly and the supporting plate.
In order to move conveniently, the lower end of the movable plate trailer 11 is provided with a roller with a brake, and the roller can roll and turn under the action of external force.
Preferably, in order to further slow down the vibration of the water pump assembly, a rubber cover tire can be arranged on the roller, and the vibration of the water pump assembly for the mobile plate trolley is slowed down through the elastic deformation of the rubber cover tire, so that the vibration of the water pump assembly during working is further slowed down.
Through the setting of removing the wooden handcart 11 and the fixed connection of water pump assembly and removal wooden handcart 11, slowed down the vibration that the water pump assembly during operation produced to guarantee the firm connection of water injection pipe and experimental water hydraulic pressure's stability, improved hydrostatic test's security and accuracy.
In the connection control device provided by the invention, after being connected in parallel, two groups of water pump assemblies inject test water into the pressure container through the water injection pipe. After the test water enters the water pump through the water inlet pipe 8, the test water is pressurized by the water pump 7 to have a large pressure, and the water injection pipe can bear the pressure of the test water.
Preferably, the water injection pipe is a high-pressure hose 6 which can resist 60MPa of working pressure; preferably a high pressure braided rubber hose. For example, the high-pressure hose 6 is an M20 high-pressure braided rubber hose to which a nut screw can be attached.
In order to realize that two groups of water pump assemblies inject test water into the pressure container in parallel, the connection control device is also provided with a connection assembly. Preferably, the connection assembly comprises a throttling pressure regulating valve 9, a stop valve 3 and a three-way joint 5, and is guided and connected by a high-pressure hose 6.
In a preferred embodiment, as shown in fig. 1, a throttle pressure regulating valve 9 is arranged at one end of the water outlet of the water pump 7, and the throttle pressure regulating valve 9 is connected with the stop valve 3 through a high-pressure hose 6.
The throttle pressure regulating valve 9 regulates the pressure in the pressure vessel to be detected by opening or closing, increasing or decreasing the valve. Generally, when the pressure container to be detected is subjected to a boosting operation, the throttling pressure regulating valve 9 is slowly closed, and the pressure in the pressure container gradually rises; after the set test pressure is reached, the throttling pressure regulating valve 9 is opened, and the pressure in the pressure container is in an automatic pressure maintaining state.
The stop valve 3 controls the flow and stop of the test water pressurized in the high-pressure hose 6 connected with the stop valve 3 through the opening and closing of the valve.
The shut-off valve 3 is connected to a three-way connection 5, preferably likewise using a high-pressure hose 6.
In a preferred embodiment, as shown in fig. 1, two sets of water pump assemblies are connected to different joints of the three-way joint 5, preferably to two opposite joints of the three-way joint 5, respectively, through the throttling and pressure regulating valve 9 and the high-pressure hose 6. Therefore, the two groups of water pump assemblies which are connected in parallel are communicated through the three-way joint 5.
Furthermore, a high-pressure hose 6 is arranged on the last joint (middle joint) of the three-way joint 5, and test water collected into the two groups of water pump assemblies in the three-way joint 5 and respectively pressurized is injected into a pressure container to be detected through the high-pressure hose 6.
In the process of water supply, the high-pressure hose 6 can drive the high-pressure hose 6 to vibrate and even move due to the pressure and vibration of test water, so that loose or loose connection among valves is caused, and the hydraulic test fails.
Preferably, the shut-off valve 3 to which the high-pressure hose 6 is connected and the three-way joint 5 are fixedly provided on the fixing bracket 17, as shown in fig. 2. The top end of the fixed bracket 17 is provided with a plane, and the stop valve 3 and the three-way joint 5 are fixed at the upper end of the fixed bracket 17 through bolts.
The fixed bracket 17 is arranged at the upper end of the movable plate trailer 11, preferably arranged on the movable plate trailer 11 of any one of the two groups of water pump assemblies, and arranged at one side close to the other group of water pump assemblies.
More preferably, the fixing bracket 17 is disposed at one side of the water pump 7 and near the motor 1, as shown in fig. 1 or 2. The fixed bracket 17 is arranged at the specific position, so that the lengths of the high-pressure hoses 6 connected with the three-way joints 5 in the two groups of water pump assemblies are basically equivalent.
This is because the difference in the length of the high-pressure hose 6 from the throttle relief valve 9 to the shutoff valve 3 causes the difference in the pressure loss of the test water in the different lines due to the distance. Thereby make the two strands of experimental water rivers pressure that get into in three way connection 5 different, when stop valve 3 sets up relatively, the too big experimental water of rivers pressure can produce the suppression effect to the less experimental water rivers of pressure, restraines it and flows in three way connection 5 to the rivers water pressure of equidirectional rivers that have avoided subducing each other.
Preferably, two groups of water pump assemblies are placed nearby and connected through a high-pressure hose 6 with an appropriate length.
In order to reduce the pressure loss caused by the distance between the high-pressure hose 6 and the throttling pressure regulating valve 9, the length of the high-pressure hose 6 between the throttling pressure regulating valve and the stop valve 3 is preferably 3-6 meters, and more preferably 3-5 meters.
In a preferred embodiment, the two water pump assemblies are connected and fixed through a 3m long high-pressure woven rubber hose.
When the hydraulic test is carried out, the safe distance between the connection control device for the hydraulic test and the pressure container is 20-25 meters in consideration of safety, water pressure loss in the high-pressure hose 6 caused by the distance and the like.
Therefore, the length of the high-pressure hose 6 which is connected with the three-way joint 5 and used for injecting water into the pressure container is preferably 20-25 m, personal safety of operators during a hydrostatic test can be guaranteed, and the hydrostatic test can be in accordance with the set pressure rise rate of the pressure container to be detected.
In order to further improve the safety of the hydraulic test, a high-pressure unloading valve 10 is preferably further provided in the water pump 7. The high pressure relief valve 10 reduces the pressure in the water pump 7 when activated, thereby reducing the pressure of the test water. By arranging the high-pressure unloading valve 10, the safety guarantee is improved for the connection control device to carry out a hydrostatic test.
Preferably, the high-pressure unloading valve 10 is a manual high-pressure unloading valve, and an operator starts or closes the high-pressure unloading valve 10 according to the working state of the hydrostatic test.
The invention also provides a connection control method for the hydraulic pressure test of the pressure container, which uses the connection control device for the hydraulic pressure test of the pressure container. The method comprises the following steps:
placing the two groups of water pump assemblies at proper positions, and connecting a throttling pressure regulating valve 9, a stop valve 3 and a three-way joint 5 by using a high-pressure hose 6 to connect the water pump assemblies in parallel; connecting the three-way joint 5 with a pressure container to be detected by using a high-pressure hose 6;
when the pressure vessel to be detected is subjected to a hydrostatic test:
opening a stop valve 3 connected with the three-way joint 5, a throttle pressure regulating valve 9 of two groups of water pump components and a high-pressure unloading valve 10 of a water pump 7;
the motor 1 is started to perform the boosting operation.
Preferably, the motor 1 is started by first running for 5 minutes at normal pressure and checking whether the pump is running normally. If there is no abnormal sound and the discharge medium of the pump has no significant fluctuation, the boosting operation can be performed.
During the pressure increasing operation, the high-pressure unloading valve 10 is closed first, then the throttling pressure regulating valve 9 is closed slowly, at the moment, the pressure in the pressure container to be detected gradually rises, and after the set test pressure is reached, the throttling pressure regulating valve 9 is opened, and the system is in an automatic pressure maintaining state.
In the pressure maintaining process, the motor 1 should be shut down.
After the pressure maintaining is finished, the high-pressure unloading valve 10 is opened to unload the pressure in the pressure container, and the hydraulic pressure test is finished.
The connection control device for the hydraulic pressure test of the pressure container is suitable for the pressure container with the ultra-large volume, and when the connection control device is used for the pressure container with the volume not particularly large, the hydraulic pressure test can be carried out by using two groups of water pump assemblies in a one-to-one standby mode.
At the moment, only any one water pump assembly is required to be set as a working pump assembly, a valve of the working pump assembly is opened, and a valve of the other water pump assembly is closed.
In a preferred embodiment, one of the shut-off valves 3 is opened, the other shut-off valve 3 is closed, and the throttle and pressure regulating valve 9 and the high pressure relief valve 10 of the operating water pump unit are opened. The remaining operations are consistent with the above.
When the connection control device and the control method for the hydraulic pressure test of the pressure container are used for carrying out the hydraulic pressure test on the pressure container, two groups of water pump assemblies can be used and prepared; when the hydraulic test is carried out on the pressure container with the ultra-large volume, the flow of the two groups of water pump assemblies can be completely output to the pressure container, so that the connection control device can meet the hydraulic test requirements of the pressure containers with different models.
Meanwhile, the distance between the connection control device for the hydraulic pressure test of the pressure container and the pressure container is between 20 and 25 meters, and the requirement of safe operation is met.
The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to be construed in a limiting sense. It will be understood by those skilled in the art that various equivalent substitutions, modifications or improvements may be made in the technical solution of the present invention and the embodiments thereof without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the invention is to be determined by the appended claims.
Claims (9)
1. A hydraulic test connection control device for a pressure container is characterized by comprising:
the water pump assemblies are connected in parallel, power is provided after the water pump assemblies are electrified, test water is pressurized and then is injected into the connecting assembly through the high-pressure hose (6);
the movable plate trailer (11) can move and turn under the action of external force, and the upper end of the movable plate trailer (11) is fixedly connected with the water pump assembly so as to slow down vibration generated when the water pump assembly works; and the number of the first and second groups,
the connecting assembly is arranged on one side of the movable plate trailer (11), and used for injecting the water for the pressurization test, which is injected by the water pump assembly, into the pressure container to be detected through the high-pressure hose (6);
the connecting assembly comprises a throttling pressure regulating valve (9), a stop valve (3) and a three-way joint (5), and guides and connects the high-pressure hose (6);
the throttling pressure regulating valve (9) is connected with the stop valve (3) through a high-pressure hose (6);
the stop valve (3) is connected with two opposite joints in the three-way joint (5), and the middle joint of the three-way joint (5) is connected with a pressure container to be detected.
2. The pressure vessel hydrostatic test connection control device of claim 1, characterized in that the water pump assembly comprises a motor (1), a belt (2), a water pump (7) and an electric cabinet (4);
wherein, an electric control element connected with the motor (1) and the water pump (7) is arranged in the electric cabinet (4), and the motor (1) and the water pump (7) are controlled to work or stop by electrifying or powering off the electric control element in the electric cabinet (4);
the motor (1) is connected with one end of the belt (2), and provides rotating power for the belt (2) after the motor (1) is electrified;
the other end of the belt (2) is connected with a water pump (7) and is driven by the rotation of the belt (2) to provide power for the water pump (7), and test water entering the water pump is pressurized by the water pump (7) and then is injected into the pressure container through a high-pressure hose (6).
3. The pressure vessel hydrostatic test connection control device of claim 2, characterized in that the highest pressure of the water pump (7) is 30 MPa;
the injection flow rate of the water pump (7) is 1200L/h at most.
4. The connection control device for the hydraulic test of the pressure vessel is characterized in that the stop valve (3) and the three-way joint (5) are fixedly arranged on the top end plane of the fixed bracket (17);
the fixed support (17) is arranged on the movable plate trailer (11) of any one of the two groups of water pump assemblies and is arranged on one side close to the other group of water pump assemblies.
5. The connection control device for the hydrostatic test of the pressure vessel is characterized in that the fixed bracket (17) is arranged at one side of the water pump (7) and close to the motor (1).
6. The hydrostatic test connection control device of the pressure vessel according to claim 1, characterized in that the lower end of the movable plate trailer (11) is provided with a roller with a brake;
the water pump assembly is fixedly connected to the upper end face of the movable plate trolley (11) in a threaded connection or welding mode.
7. The connection control device for the hydraulic test of the pressure vessel is characterized in that a high-pressure unloading valve (10) is further arranged in the water pump (7), and the pressure of test water is reduced by reducing the pressure in the water pump (7) when the high-pressure unloading valve (10) is started.
8. A control method using the pressure vessel hydraulics test connection of any of claims 1-7, characterized in that the method comprises the steps of:
placing the two groups of water pump assemblies to proper positions, and connecting a throttling pressure regulating valve (9), a stop valve (3) and a three-way joint (5) by using a high-pressure hose (6) to connect the water pump assemblies in parallel; connecting the three-way joint 5 with a pressure container to be detected by using a high-pressure hose (6);
when the pressure vessel to be detected is subjected to a hydrostatic test:
opening a stop valve (3) connected with a three-way joint (5), throttling pressure regulating valves (9) of two groups of water pump assemblies and a high-pressure unloading valve (10) of a water pump (7), starting a motor (1) and performing boosting operation;
during the pressure increasing operation, the high-pressure unloading valve (10) is closed, then the throttling pressure regulating valve (9) is closed slowly, the pressure in the pressure container to be detected gradually rises at the moment, the throttling pressure regulating valve (9) is opened after the set test pressure is reached, and the system is in an automatic pressure maintaining state;
after the pressure maintaining is finished, the high-pressure unloading valve 10 is opened to unload the pressure in the pressure container, and the hydraulic pressure test is finished.
9. The method according to claim 8, characterized in that when two groups of water pump assemblies are used for hydrostatic test in a one-to-one mode, any water pump assembly is set as a working pump group;
opening a stop valve (3), a throttling pressure regulating valve (9) and a high-pressure unloading valve (10) of a working pump group;
and closing a stop valve (3), a throttling pressure regulating valve (9) and a high-pressure unloading valve (10) of the other water pump assembly.
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