Balance valve delivery test board and test method
Through the integrated balance valve factory test bench, the automatic integration of the set pressure debugging of the balance valve and the leakage test is achieved, solving the problems of low testing efficiency and poor accuracy in the existing technology, and achieving efficient and accurate balance valve factory test.
Patent Information
- Application Number
- CN202510492298.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2025-07-18
AI Technical Summary
In the prior art, the factory test automation of balancing valves is low, making it difficult to efficiently and accurately complete set pressure debugging and leakage tests, resulting in cumbersome operation and inaccurate test results.
Design an integrated balance valve factory test bench, including valve installation module, valve pressure regulating module, pump group module, pump pressure regulating module and circulating cooling module. Through automated control and precise regulation of oil pressure and temperature, the set pressure debugging and leakage test are integrated, and the leakage phenomenon is observed using throttles.
It realizes the efficiency and accuracy of the factory test of the balance valve, reduces human error, improves testing efficiency and accuracy, can intuitively determine the leakage amount, and meets high-precision requirements.
Smart Images
Figure CN120333813A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of valve body testing, and particularly to a factory test bench and a test method for a balance valve. Background Art
[0002] As a key fluid control component, the factory test of a balance valve needs to meet two important indicators: one is to adjust the balance valve to the set pressure value required by the customer; the other is that the balance valve must meet the leakage test under the set pressure, so as to effectively ensure the qualification rate of the product delivered for use.
[0003] In the related art, it is usually necessary to assemble the balance valve on the debugging equipment. After repeated debugging, the balance valve is disassembled and then assembled on another test equipment to test the leakage of the balance valve. During this process, the debugging equipment or the test equipment can only perform single processing, with low automation. It is necessary to repeatedly disassemble and assemble the balance valve and repeat the debugging work many times, resulting in cumbersome operation. Moreover, the leakage amount of the balance valve during the test is relatively low, and it is difficult to directly observe and determine whether it meets the leakage test requirements during the test, so the factory test of the balance valve cannot be completed efficiently and accurately.
[0004] The information disclosed in this background art section is only intended to deepen the understanding of the overall background art of the present invention, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art. Summary of the Invention
[0005] The technical problem to be solved by the present invention is: to provide a factory test bench and a test method for a balance valve to achieve efficient and precise control of the factory test of the balance valve.
[0006] In order to achieve the above object, the technical solution adopted by the present invention is: a factory test bench for a balance valve, comprising: A test bench, including a valve installation module and a valve pressure regulation module. The valve installation module provides an assembly space for the valve to be tested, and the valve pressure regulation module is connected to the valve installation module to adjust the oil pressure passing through the valve to be tested. A control console, including a pump group module, a pump pressure regulation module, and a circulating cooling module; the pump pressure regulation module is located in the delivery path between the pump group module and the valve installation module to adjust the oil pressure output by the pump group module, and the circulating cooling module is connected to the pump group module to adjust the oil temperature output by the pump group module. The valve installation module includes a valve installation solenoid valve, a pressure gauge, a valve installation check valve, and a throttle. The oil output by the pumping module passes through the valve installation check valve and the valve installation solenoid valve and is pumped into the valve to be tested, and then enters the pumping module again. The throttle is arranged in the oil return path.
[0007] Further, a safety overflow valve is also provided in the valve installation module, and the safety overflow valve is arranged in parallel with the valve installation solenoid valve.
[0008] Further, the valve pressure regulating module includes a mechanical pressure regulating valve group and an electro-hydraulic proportional pressure regulating valve group arranged in parallel. The mechanical pressure regulating valve group includes a mechanical pressure regulating solenoid valve and a mechanical pressure regulating overflow valve connected in sequence. The electro-hydraulic proportional pressure regulating valve group includes an electro-hydraulic proportional pressure regulating solenoid valve, an overflow valve base, and an electro-hydraulic proportional overflow valve arranged in sequence. One end of the electro-hydraulic proportional overflow valve is connected with an amplifier and a potentiometer.
[0009] Further, the pump group module includes an oil tank, a pumping motor, a high-pressure piston pump, a coupling, a bell housing, and an oil high-pressure filter. The high-pressure piston pump and the coupling are arranged in the oil tank. The bell housing is arranged outside the coupling. The pumping motor is connected to the high-pressure piston pump through the coupling. The high-pressure piston pump is connected to the pump pressure regulating module through the oil high-pressure filter.
[0010] Further, a liquid level gauge, a heater, and a temperature sensor are arranged in the oil tank. The liquid level gauge is electrically connected to a low liquid level alarm. The probes of the heater and the temperature sensor are immersed in the oil, and the sensing temperature of the temperature sensor can be adjusted.
[0011] Further, a check valve, a visual flow indicator, a return oil filter, an air filter, and an oil filter are arranged in the return oil path of the oil. The oil passes through the check valve, the visual flow indicator, and the return oil filter in sequence and is recycled to the oil tank. The air filter is arranged outside the oil tank, and the oil filter is arranged inside the oil tank.
[0012] Further, the pump pressure regulating module includes an oil pump pressure regulating overflow valve, an oil pump pressurizing solenoid valve, a test circuit pressurizing solenoid valve, a pump pressure regulating check valve, and a pressure measuring joint. The oil pump pressure regulating overflow valve, the oil pump pressurizing solenoid valve, and the test circuit pressurizing solenoid valve are arranged in parallel. The pump pressure regulating check valve is connected to the test circuit pressurizing solenoid valve, and the pressure measuring joint is connected to the oil pump pressure regulating overflow valve.
[0013] Further, the circulating cooling module includes a circulating motor, a vane pump, a cooler, a circulating filter, and a circulating high-pressure filter connected in sequence. An oil suction filter is arranged in the water tank. The oil suction filter and the circulating motor are connected through a ball valve. The water outlet of the cooler is connected to an electromagnetic valve. The water inlet of the cooler is connected to a ball valve, and a ball valve is arranged in parallel on the electromagnetic valve.
[0014] The present invention also provides a method for factory testing a balance valve. Using the balance valve factory test bench described in any of the above, it includes the following steps: Start the test bench, set the circulating cooling module, and control the oil temperature within the set range. Assemble the valve to be tested onto the valve mounting module and start the pump module. Adjust the output pressure of the pump module through the pump pressure regulating module so that the test circuit of the valve to be tested is connected to the pump module and the pump pressure regulating module. Adjust the oil pressure of the valve pressure regulating module to the set value of the pressure of the valve to be tested. Control the valve to be tested to repeatedly open and close a set number of times through the valve mounting solenoid valve to discharge the air brought into the valve during installation. Adjust the pressure of the valve to be tested to the set value. Through the valve pressure regulating module, lower the oil pressure passing through the valve to be tested to 0, and then raise it again to 85% of the set value of the pressure of the valve to be tested. Continuously pressurize and maintain for the set time, and record the number of oil drops of the throttle during the set time. Based on the number of oil drops, determine whether the valve to be tested meets the requirements of the valve leakage test.
[0015] Further, adjusting the pressure of the valve to be tested to the set value includes the following steps: Adjust the pressure value of the valve to be tested from high to low through the pressure regulating bolt until the oil outlet state at the throttle is changed from dripping to linear, and determine that the pressure of the valve to be tested is adjusted to the set value at this time. Observe the oil pressure at the pressure gauge, automatically adjust the oil pressure passing through the valve to be tested from 0 to exceed the set value of the valve to be tested through the valve pressure regulating module, and observe during the pressure increase process to determine: whether the oil outlet state at the throttle is exactly changed from dripping to linear when reaching the set value. If not, re-adjust the pressure value of the valve to be tested until the above determination requirements are met. If so, perform the valve leakage testing process.
[0016] The beneficial effects of the present invention are as follows: Through the integrated test bench design, the present invention integrates the set pressure debugging and leakage amount testing of the balance valve into the same device. Only need to install and disassemble the balance valve to be tested once to complete the two steps of pressure debugging and leakage testing at one time, significantly improving the test efficiency and reducing the human error introduced by repeatedly installing and disassembling the balance valve. At the same time, after the pressure debugging is completed, by precisely controlling the pressure and conduction of the oil, the accuracy and reliability of the test results are ensured; when there is leakage, the oil leakage phenomenon can be intuitively observed at the throttle, which is easy to directly determine the test effect, realizing the efficient and accurate detection of the leakage amount of the balance valve and meeting the high-precision requirements of the balance valve factory test. Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a schematic structural diagram of the balance valve factory test bench in the embodiment of the present invention; Figure 2 It is a schematic layout diagram of the balance valve factory test bench in the embodiment of the present invention; Figure 3 It is a top view of the balance valve factory test bench in the embodiment of the present invention; Figure 4 It is a front view of the internal structure of the balance valve factory test bench in the embodiment of the present invention; Figure 5 It is a left view of the balance valve factory test bench in the embodiment of the present invention; Figure 6 It is a bottom view of the internal structure of the balance valve factory test bench in the embodiment of the present invention; Figure 7 It is a rear view of the balance valve factory test bench in the embodiment of the present invention; Figure 8 It is a right view of the internal structure of the balance valve factory test bench in the embodiment of the present invention; Figure 9 It is a schematic flow diagram of the balance valve factory test method in the embodiment of the present invention; Figure 10 It is a schematic flow diagram of adjusting the pressure of the valve under test to the set value in the embodiment of the present invention.
[0019] Reference numerals: 1, test bench; 2, control console; 3, valve to be tested; 10, valve installation module; 11, valve installation solenoid valve; 12, pressure gauge; 13, valve installation check valve; 14, throttle element; 15, safety relief valve; 20, valve pressure regulation module; 211, mechanical pressure regulation solenoid valve; 212, mechanical pressure regulation relief valve; 221, electro-hydraulic proportional pressure regulation solenoid valve; 222, relief valve base; 223, electro-hydraulic proportional relief valve; 224, amplifier; 225, potentiometer; 30, pump unit module; 31, oil tank; 32, pumping motor; 33, high-pressure piston pump; 34, coupling; 35, bell housing; 36, high-pressure oil filter; 37, liquid level gauge; 38, heater; 39, temperature sensor; 310, visual flow indicator; 311, return oil filter; 312, air filter; 313, oil filter; 314, return oil check valve; 40, pump pressure regulation module; 41, oil pump pressure regulation relief valve; 42, oil pump pressurization solenoid valve; 43, test circuit pressurization solenoid valve; 44, pump pressure regulation check valve; 45, pressure measuring joint; 50, circulating cooling module; 51, circulating motor; 52, vane pump; 53, cooler; 54, circulating filter; 55, circulating high-pressure filter; 56, suction filter; 57, electromagnetic water valve. Detailed implementation manners
[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.
[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manners.
[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0023] As Figures 1 to 8 shown, a balance valve factory test bench and a test method include: The test bench 1 includes a valve installation module 10 and a valve pressure regulation module 20. The valve installation module 10 provides an assembly space for the valve 3 to be tested, and the valve pressure regulation module 20 is connected to the valve installation module 10 to adjust the hydraulic pressure of the hydraulic fluid passing through the valve 3 to be tested. The control console 2 includes a pump unit module 30, a pump pressure regulation module 40, and a circulating cooling module 50. The pump pressure regulation module 40 is located in the delivery path of the pump unit module 30 and the valve installation module 10 to adjust the hydraulic pressure of the hydraulic fluid output by the pump unit module 30. The circulating cooling module 50 is connected to the pump unit module 30 to adjust the hydraulic fluid temperature of the hydraulic fluid output by the pump unit module 30. The valve installation module 10 includes a valve installation solenoid valve 11, a pressure gauge 12, a valve installation check valve 13, and a throttle element 14. The hydraulic fluid output by the pumping module passes through the valve installation check valve 13 and the valve installation solenoid valve 11 and is pumped into the valve 3 to be tested, and then enters the pumping module again. The throttle element 14 is arranged in the oil return path of the hydraulic fluid.
[0024] Through the integrated test bench design of the present invention, the setting pressure debugging and leakage volume test of the balance valve are integrated into the same device. Only by installing and disassembling the balance valve to be tested once can the two steps of pressure debugging and leakage test be completed at one time, significantly improving the test efficiency and reducing the human error introduced by repeatedly installing and disassembling the balance valve. At the same time, after the pressure debugging is completed, by precisely controlling the pressure and conduction of the hydraulic fluid, the accuracy and reliability of the test results are ensured. When there is a leak, the oil leakage phenomenon can be intuitively observed at the throttle element 14, which is easy to directly judge the test effect, realizing the efficient and accurate detection of the leakage volume of the balance valve and meeting the high-precision requirements of the balance valve factory test.
[0025] The valve installation module 10 provides an assembly space for the valve 3 to be tested, ensuring the stable installation of the balance valve during the test. At the same time, the flow direction of the hydraulic fluid is controlled by the valve installation solenoid valve 11 and the check valve to prevent backflow and ensure the stability of the test process. Specifically, the valve installation solenoid valve 11 controls the on-off of the hydraulic fluid to realize the automatic control of the test process. The pressure gauge 12 monitors the pressure of the hydraulic fluid passing through the balance valve in real time to ensure the precise control and recording of the pressure during the test. The valve installation check valve 13 prevents the backflow of the hydraulic fluid, ensures the unidirectional flow of the hydraulic fluid, and improves the stability of the test system. The throttle element 14 is arranged in the oil return path of the hydraulic fluid. By observing the oil leakage phenomenon at the throttle element 14, it can assist in judging whether it meets the requirements of the leakage test and ensure the accuracy of the test results.
[0026] The valve pressure regulating module 20 is connected to the valve installation module 10 and is used to regulate the oil pressure passing through the balance valve, ensuring that the balance valve can be accurately set to the pressure value required by the customer and maintaining a stable oil pressure during the leakage test; the pump group module 30 provides power for the entire test system, outputs a stable oil flow rate, and ensures the continuity of the test process; the pump pressure regulating module 40 is located in the conveying path between the pump group module 30 and the valve installation module 10 and is used to regulate the oil pressure output by the pump group, ensuring that the oil pressure can accurately reach the set value and meet the set pressure test requirements of the balance valve; the circulating cooling module 50 is connected to the pump group module 30, regulates the temperature of the oil, ensures the stability of the oil temperature during the test process, avoids the influence of temperature changes on the test results, and improves the accuracy and reliability of the test.
[0027] On the basis of the above embodiment, a safety overflow valve 15 is further provided in the valve installation module 10, and the safety overflow valve 15 is arranged in parallel with the valve installation solenoid valve 11; the safety overflow valve 15 automatically opens when the system pressure exceeds the set value, returns the excess oil to the fuel tank 31, and prevents equipment damage caused by excessive system pressure. During the test process, when fluctuations occur, the safety overflow valve 15 can release the excess pressure, ensure the constancy of the pressure during the test process, efficiently control the pressure range, reduce test interruptions or repeated operations caused by abnormal pressure, and improve the test efficiency and the accuracy of the test results.
[0028] In addition, a maintenance oil circuit is additionally provided in the valve installation module 10. During maintenance, the oil circuit channel of the valve 3 to be tested is accessed through an additional ball valve and pressure gauge 12, and the pressure change in the oil circuit channel of the valve 3 to be tested is monitored in real time. The location of the fault is determined according to the readings of the additional pressure gauge 12 under different oil pressures and conduction states, and fault diagnosis is carried out to accurately locate the fault location, thereby improving the maintenance efficiency and accuracy.
[0029] On the basis of the above embodiment, the valve pressure regulating module 20 includes a mechanical pressure regulating valve group and an electro-hydraulic proportional pressure regulating valve group arranged in parallel. The mechanical pressure regulating valve group includes a mechanical pressure regulating solenoid valve 211 and a mechanical pressure regulating overflow valve 212 connected in sequence. The electro-hydraulic proportional pressure regulating valve group includes an electro-hydraulic proportional pressure regulating solenoid valve 221, an overflow valve base 222, and an electro-hydraulic proportional overflow valve 223 arranged in sequence; one end of the electro-hydraulic proportional overflow valve is connected with an amplifier 224 and a potentiometer 225.
[0030] The mechanical pressure regulating valve group can realize the function of manual pressure regulation. The mechanical pressure regulating solenoid valve 211 is used to control the on-off of the oil fluid to ensure the precise control of the pressure regulation process. The mechanical pressure regulating overflow valve 212 can ensure that the system pressure will not exceed the safe range in the manual pressure regulation mode, which is applicable to rapid and rough pressure setting and is suitable for the initial stage of batch testing or testing scenarios with low precision requirements. The electro-hydraulic proportional pressure regulating valve can realize the function of automatic pressure regulation. The electro-hydraulic proportional pressure regulating solenoid valve 221 controls the on-off of the oil fluid through an electric signal to achieve precise dynamic pressure regulation. The overflow valve base 222 serves as the installation base for the electro-hydraulic proportional pressure regulating overflow valve to ensure its stability and reliability. The electro-hydraulic proportional pressure regulating overflow valve controls the pressure output through an electric signal and can achieve high-precision and dynamic pressure regulation. One end of it is connected to the amplifier 224 and the potentiometer 225, which are used to amplify the electric signal and precisely adjust the pressure output, and is applicable to testing scenarios that require high-precision pressure regulation.
[0031] By introducing the mechanically pressure regulating valve group and the electro-hydraulic proportional pressure regulating valve group arranged in parallel, the valve pressure regulating module 20 can not only rapidly and roughly regulate the pressure, but also achieve high-precision and dynamic pressure regulation. Furthermore, the balance valve factory test bench has been significantly improved in terms of flexibility, precision, automation level and safety, and can better meet the high-precision requirements of modern industrial production for balance valve testing.
[0032] On the basis of the above embodiments, the pump group module 30 includes an oil tank 31, a pumping motor 32, a high-pressure plunger pump 33, a coupling 34, a bell housing 35 and an oil high-pressure filter 36. The high-pressure plunger pump 33 and the coupling 34 are arranged in the oil tank 31. The bell housing 35 is arranged outside the coupling 34. The pumping motor 32 is connected to the high-pressure plunger pump 33 through the coupling 34. The high-pressure plunger pump 33 is connected to the pump pressure regulating module 40 through the oil high-pressure filter 36.
[0033] The pump unit module 30 is the power core of the entire test bench, responsible for providing stable oil pressure and flow rate for the system, and having efficient and stable oil delivery capacity; the oil tank 31 serves as a storage container for the oil. The oil tank 31 provides sufficient oil supply for the entire system. At the same time, the oil tank 31 also plays a role in sedimenting impurities and cooling the oil, ensuring the cleanliness and temperature stability of the oil; the pumping motor 32 provides power for the high-pressure piston pump 33, drives the high-pressure piston pump 33 to work through the rotation of the motor, and its performance directly affects the oil delivery efficiency and pressure stability; the high-pressure piston pump 33 can provide stable high-pressure oil for the valve 3 to be tested, meeting the high-pressure requirements for the balance valve test; the coupling 34 connects the pumping motor 32 and the high-pressure piston pump 33, and can effectively reduce mechanical vibration, ensuring smooth and efficient power transmission between the two, improving the reliability of the system; the bell-shaped cover 35 is arranged outside the coupling 34, playing a role in protecting the coupling 34 from external interference; the oil high-pressure filter 36 is installed at the outlet of the high-pressure piston pump 33, used to filter impurities and particles in the oil, effectively preventing impurities from entering the system, ensuring the cleanliness of the oil entering the pump pressure regulating module 40, and avoiding damage to the balance valve and test equipment.
[0034] On the basis of the above embodiments, a liquid level gauge 37, a heater 38 and a temperature sensor 39 are arranged in the oil tank 31. The liquid level gauge 37 is electrically connected to the low liquid level alarm. The probes of the heater 38 and the temperature sensor 39 are immersed in the oil, and the sensing temperature of the temperature sensor 39 can be adjusted and set.
[0035] By arranging the liquid level gauge 37, the heater 38 and the temperature sensor 39 in the oil tank 31, the liquid level and temperature of the oil supply can be accurately monitored and adjusted. The liquid level gauge 37 is used to monitor the liquid level height of the oil in the oil tank 31 in real time. Through the liquid level gauge 37, the inventory of the oil in the oil tank 31 can be visually confirmed, ensuring the stability of the oil supply; the liquid level gauge 37 is electrically connected to the low liquid level alarm. When the oil liquid level is lower than the set safety value, the low liquid level alarm will give an alarm, reminding the operator to replenish the oil in time to avoid test interruption or equipment damage caused by insufficient oil. Specifically, when the alarm occurs, the entire test bench should stop to prevent dry grinding of the oil pump and damage to components; the probe of the temperature sensor 39 is immersed in the oil, and can monitor the actual temperature of the oil in real time. Through the temperature sensor 39, the operator can accurately master the oil temperature to ensure that it meets the test requirements; the heater 38 is installed inside the oil tank 31, and its function is to increase the temperature of the oil, ensuring the fluidity of the oil in a low-temperature environment; the sensing temperature of the temperature sensor 39 can be adjusted and set, enabling the operator to set the target temperature range according to different test requirements, and automatically adjust the oil temperature through the heater 38 to keep it always in the best working state.
[0036] On the basis of the above embodiments, a check valve 314 for oil return, a visual flow indicator 310, an oil return filter 311, an air filter 312, and an oil filter 313 are provided in the oil return path of the oil fluid. The oil fluid sequentially passes through the check valve 314 for oil return, the visual flow indicator 310, and the oil return filter 311 and is recycled to the fuel tank 31. The air filter 312 is arranged outside the fuel tank 31, and the oil filter 313 is arranged inside the fuel tank 31.
[0037] The check valve 314 for oil return ensures that the oil fluid can only flow in one direction. It is arranged at the starting position of the oil return path to ensure that the oil fluid always flows in a predetermined direction during the oil return process, prevent the oil fluid from flowing back during the oil return process, avoid system pressure fluctuations or equipment damage caused by the oil fluid flowing back, and enhance the stability and reliability of the system. The visual flow indicator 310 can display the oil return flow rate of the oil fluid in real time, facilitating the operator to visually observe the flow condition of the oil fluid, judge whether the oil return is normal, promptly detect abnormal flow rates, and ensure the normal operation of the oil return system. The oil return filter 311 can effectively remove contaminants in the oil fluid, ensure the cleanliness of the oil fluid before it returns to the fuel tank 31, reduce the impact of impurities on the fuel tank 31 and subsequent test equipment, and extend the service life of the equipment. The air filter 312 is arranged outside the fuel tank 31 to filter the air entering the fuel tank 31, which can effectively prevent dust and impurities in the air from entering the fuel tank 31, maintain the cleanliness of the oil fluid, and reduce the deterioration of the oil fluid or equipment failures caused by air pollution. The oil filter 313 is arranged inside the fuel tank 31 to purify and filter the externally supplemented oil fluid and the oil fluid supplemented from the oil return path, effectively removing residual impurities in the oil fluid, ensuring that the oil fluid always maintains high quality during the recycling process, and meeting the test requirements.
[0038] On the basis of the above embodiments, the pump pressure regulating module 40 includes an oil pump pressure regulating relief valve 41, an oil pump pressurizing solenoid valve 42, a test circuit pressurizing solenoid valve 43, a pump pressure regulating check valve 44, and a pressure measuring joint 45. The oil pump pressure regulating relief valve 41, the oil pump pressurizing solenoid valve 42, and the test circuit pressurizing solenoid valve 43 are arranged in parallel. The pump pressure regulating check valve 44 is connected to the test circuit pressurizing solenoid valve 43, and the pressure measuring joint 45 is connected to the oil pump pressure regulating relief valve 41.
[0039] The oil pump pressure regulating relief valve 41 ensures that the system pressure does not exceed the preset value by setting the relief pressure, playing the role of safety protection and pressure regulation. When the system pressure reaches the set value, the oil pump pressure regulating relief valve 41 opens, and the excess oil flows back to the oil tank 31 to maintain the stability of the system pressure; the oil pump pressurizing solenoid valve 42 controls the on-off of the oil through electromagnetic control, and is used to adjust the output pressure of the oil pump. When the pressure needs to be increased, the oil pump pressurizing solenoid valve 42 opens, and the oil enters the system; when it is not needed, the oil pump pressurizing solenoid valve 42 closes to prevent the oil from flowing back; the test circuit pressurizing solenoid valve 43 is used for the pressure regulation of the test circuit, ensuring the precise control of the pressure during the test, realizing the rapid pressurization or pressure relief of the test circuit, and meeting the requirements of different test stages; the pump pressure regulating check valve 44 is connected to the test circuit pressurizing solenoid valve 43 to ensure that the oil in the test circuit does not flow back during the pressurization process, improving the stability and reliability of the system; the pressure measuring joint 45 can be used to connect the pressure gauge 12 or the sensor to real-time monitor the oil pressure in the pump pressure regulating module 40.
[0040] On the basis of the above embodiments, the circulating cooling module 50 includes a circulating motor 51, a vane pump 52, a cooler 53, a circulating filter 54, and a circulating high-pressure filter 55 connected in sequence. An oil suction filter 56 is arranged in the water tank. The oil suction filter 56 and the circulating motor 51 are connected by a ball valve. The water outlet of the cooler 53 is connected to the solenoid valve; the water inlet of the cooler 53 is connected to a ball valve, and a ball valve is arranged in parallel on the solenoid valve 57.
[0041] The circulating cooling module 50 ensures that the temperature and cleanliness of the oil are always in the best state through a fine filtration system and a flexible control method. The circulating motor 51 provides power for the entire cooling circulation system, driving the vane pump 52 to operate, thereby pumping out the oil and entering the cooler 53. The cooler 53 reduces the temperature of the oil through the heat exchange between the coolant and the oil, ensuring that the oil always maintains a stable temperature during the test and avoiding affecting the accuracy of the test results due to temperature rise; after the cooler 53 finishes processing, to ensure the cleanliness of the oil, before returning to the oil tank 31 again, the oil passes through the circulating filter 54 and the circulating high-pressure filter 55 for double filtration to remove impurities and particles therein; the circulation of the coolant in the cooler 53 is controlled by the conduction of the solenoid valve 57 and the ball valve, so as to flexibly control the on-off and flow regulation of the coolant.
[0042] As Figures 9 to 10 shown, the present invention also provides a method for testing the balance valve during factory testing. Using the balance valve factory test bench as described in any one of the above, it includes the following steps: Start the test bench and set the circulating cooling module 50 to control the oil temperature within the set range; Assemble the valve to be tested 3 onto the valve mounting module 10 and start the pump group module 30; Adjust the output pressure of the pump module 30 through the pump pressure regulating module 40, so that the test circuit of the valve to be tested 3 is communicated with the pump module 30 and the pump pressure regulating module 40; Adjust the oil pressure of the valve pressure regulating module 20 to the set value of the pressure of the valve to be tested 3; Control the valve to be tested 3 to open and close repeatedly for a set number of times through the valve installation solenoid valve 11 to discharge the air brought into the valve during the installation of the valve to be tested 3; Adjust the pressure of the valve to be tested 3 to the set value; Through the valve pressure regulating module 20, lower the oil pressure passing through the valve to be tested 3 to 0, and then raise it again to 85% of the set value of the pressure of the valve to be tested 3, continuously apply pressure and maintain for a set time, while recording the number of oil droplets of the throttle element 14 within the set time; Based on the number of oil droplets, determine whether the valve to be tested 3 meets the requirements of the valve leakage test.
[0043] By precisely controlling the pressure and conduction of the oil, ensure the accuracy and reliability of the test results; when there is leakage, the oil leakage phenomenon can be directly observed at the throttle element 14, which is easy to directly judge the test effect, realizing the efficient and accurate detection of the leakage amount of the balance valve and meeting the high-precision requirements of the balance valve factory test.
[0044] On the basis of the above embodiment, adjusting the pressure of the valve to be tested 3 to the set value includes the following steps: Adjust the pressure value of the valve to be tested 3 from high to low through the pressure regulating bolt until the oil outlet state of the oil at the throttle element 14 changes from dripping to linear state, and determine that the pressure of the valve to be tested 3 is adjusted to the set value at this time; Observe the oil pressure at the pressure gauge 12, automatically adjust the oil pressure passing through the valve to be tested 3 from 0 to exceed the set value of the valve to be tested 3 through the valve pressure regulating module 20, and observe during the pressure increase process to determine: whether the oil outlet state of the oil at the throttle element 14 just changes from dripping to linear state when reaching the set value; If not, re-adjust the pressure value of the valve to be tested 3 until the above determination requirements are met; If so, perform the valve leakage process.
[0045] Specifically, the oil fluid enters from the inlet of the valve under test 3. During the pressure boosting process, the outlet of the valve under test 3 gradually opens. For the oil fluid from the inlet to the outlet, part of it returns to the fuel tank 31 through the oil return path, and the other part flows out from the throttle element 14 to the tabletop of the test bench 1 and then back to the fuel tank 31. During the opening process of the valve under test 3, the state of the oil fluid at the throttle element 14 slowly changes from a droplet state to a linear state. When it just changes to the linear state, it is determined that the critical value of the leakage amount is reached; when adjusting the set pressure of the valve under test 3, only the inlet of the valve under test 3 is pressurized, and the solenoid valve 11 installed on the valve is de-energized, so that the other inlet of the valve under test 3 is not pressurized and the oil flows directly back to the fuel tank 31. In this state, when the pressurization makes the opening state of the valve under test 3 such that the oil outlet state of the throttle element 14 just changes to the linear state, the valve under test 3 reaches the set pressure at this time.
[0046] Specifically, taking the set pressure of the valve under test 3 as 210 bar as an example, the leakage test of the valve under test 3 is carried out; the test pressure is 85% of the set pressure, and the leakage amount at the throttle element 14 needs to be less than or equal to 5 drops / min to meet the leakage test requirements. The test process is as follows: Start the test bench. The heater 38 operates according to the set range of the temperature sensor 39, and is powered on for heating or powered off to stop heating; start the circulating cooling module 50 to make the oil fluid in the fuel tank 31 pass through the cooler 53, the circulating filter 54 and the circulating high-pressure filter 55. The oil fluid is continuously circulated and filtered. The electromagnetic water valve 57 realizes the on-off of the coolant according to the set range of the temperature sensor 39. Through the heater 38, the cooler 53 and the electromagnetic water valve 57, the oil temperature is controlled within the range set by the temperature sensor 39; Assemble the valve under test 3 onto the valve installation module 10 and start the pump group module 30; The oil pump pressurization solenoid valve 42 is powered on, and the pumping motor 32 starts to load. At this time, the system output pressure is the set value 380 bar of the oil pump pressure regulating overflow valve 41; The test circuit pressurization solenoid valve 43 is powered on, and the test circuit of the valve under test 3 is connected to the pump group module 30 and the pump pressure regulating module 40; The mechanical pressure regulating solenoid valve 211 is de-energized, and the electro-hydraulic proportional pressure regulating solenoid valve 221 is powered on. At this time, the system pressure is the set value 210 bar of the mechanical pressure regulating overflow valve 212; The pilot pressure control valve installation solenoid valve 11 is powered on and off 5 times, so that the valve under test 3 is repeatedly opened and closed 5 times to discharge the air brought into the valve during installation and avoid abnormal valve performance; Adjust the pressure regulating bolt of the valve under test 3, lower its set value from high to low, so that the oil outlet state of the throttle element 14 shows a state of changing from droplets to a line. At this time, the set pressure of the valve under test 3 is roughly adjusted to 210 bar; The mechanical pressure regulating solenoid valve 211 is powered on, and the electro-hydraulic proportional pressure regulating solenoid valve 221 is de-energized. At this time, the system pressure is regulated by the electro-hydraulic proportional overflow valve 223; Observe the pressure from the pressure gauge 12, gradually increase the pressure of the electro-hydraulic proportional relief valve 223 from 0 to 220 bar, and at the same time observe the oil outlet situation of the throttle 14 connected to the outlet of the valve 3 to be tested, whether it just reaches the state of changing from dripping to a line at 210 bar; If it changes from dripping to a line only when it is lower or higher than 210 bar, then readjust the pressure regulating bolt of the valve 3 to be tested until the requirement is met; If so, it is determined that the pressure of the valve 3 to be tested reaches the set 210 bar, and the next valve leakage test process will be carried out; Reduce the pressure of the electro-hydraulic proportional relief valve 223 to 0 bar, and then gradually increase it to 85% of the set value of the valve 3 to be tested, that is, 210 * 0.85 = 178.5 bar, continuously pressurize and maintain for one minute, and at the same time record the number of drops of oil dripping from the throttle 14 in this minute; If the leakage amount at the throttle 14 needs to be less than or equal to 5 drops / min, it meets the valve leakage test requirements, otherwise, it does not meet the leakage test requirements.
[0047] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A balance valve factory test bench, characterized in that Comprising: A test bench (1), including a valve installation module (10) and a valve pressure regulating module (20), wherein the valve installation module (10) provides an assembly space for a valve under test (3), and the valve pressure regulating module (20) is connected to the valve installation module (10) to adjust the hydraulic pressure passing through the valve under test (3); A control console (2), including a pump group module (30), a pump pressure regulating module (40) and a circulating cooling module (50); the pump pressure regulating module (40) is located in the delivery path between the pump group module (30) and the valve installation module (10) to adjust the hydraulic pressure output by the pump group module (30), and the circulating cooling module (50) is connected to the pump group module (30) to adjust the hydraulic temperature output by the pump group module (30); The valve installation module (10) includes a valve installation solenoid valve (11), a pressure gauge (12), a valve installation check valve (13), and a throttle element (14). The hydraulic oil output by the pumping module passes through the valve installation check valve (13) and the valve installation solenoid valve (11) and is pumped into the valve under test (3), and then enters the pump group module (30) again. The throttle element (14) is arranged in the oil return path of the hydraulic oil.
2. The factory test bench for the balance valve according to claim 1, characterized in that A safety overflow valve (15) is also arranged in the valve installation module (10), and the safety overflow valve (15) is arranged in parallel with the valve installation solenoid valve (11).
3. The factory test bench for the balance valve according to claim 1, characterized in that, The valve pressure regulating module (20) includes a mechanical pressure regulating valve group and an electro-hydraulic proportional pressure regulating valve group arranged in parallel. The mechanical pressure regulating valve group includes a mechanical pressure regulating solenoid valve (211) and a mechanical pressure regulating overflow valve (212) connected in sequence. The electro-hydraulic proportional pressure regulating valve group includes an electro-hydraulic proportional pressure regulating solenoid valve (221), an overflow valve base (222) and an electro-hydraulic proportional overflow valve (223) arranged in sequence; one end of the electro-hydraulic proportional overflow valve is connected with an amplifier (224) and a potentiometer (225).
4. The factory test bench for the balance valve according to claim 1, characterized in that, The pump group module (30) includes an oil tank (31), a pumping motor (32), a high-pressure plunger pump (33), a coupling (34), a bell housing (35) and a hydraulic oil high-pressure filter (36). The high-pressure plunger pump (33) and the coupling (34) are arranged in the oil tank (31). The bell housing (35) is arranged outside the coupling (34). The pumping motor (32) is connected to the high-pressure plunger pump (33) through the coupling (34), and the high-pressure plunger pump (33) is connected to the pump pressure regulating module (40) through the hydraulic oil high-pressure filter (36).
5. The factory test bench for the balance valve according to claim 4, characterized in that, A liquid level gauge (37), a heater (38) and a temperature sensor (39) are arranged in the oil tank (31). The liquid level gauge (37) is electrically connected to a low liquid level alarm. The probes of the heater (38) and the temperature sensor (39) are immersed in the hydraulic oil, and the sensing temperature of the temperature sensor (39) can be adjusted and set.
6. The factory test bench for the balance valve according to claim 5, characterized in that, A check valve (314), a visual flow indicator (310), a return oil filter (311), an air filter (312) and an oil filter (313) are arranged in the oil return path of the oil fluid. The oil fluid is recycled to the oil tank (31) through the check valve (314), the visual flow indicator (310) and the return oil filter (311) in sequence. The air filter (312) is arranged outside the oil tank (31), and the oil filter (313) is arranged inside the oil tank (31).
7. The factory test bench for the balance valve according to claim 1, characterized in that, The pump pressure regulating module (40) includes an oil pump pressure regulating overflow valve (41), an oil pump pressurizing solenoid valve (42), a test circuit pressurizing solenoid valve (43), a pump pressure regulating check valve (44) and a pressure measuring joint (45). The oil pump pressure regulating overflow valve (41), the oil pump pressurizing solenoid valve (42) and the test circuit pressurizing solenoid valve (43) are arranged in parallel. The pump pressure regulating check valve (44) is connected with the test circuit pressurizing solenoid valve (43), and the pressure measuring joint (45) is connected with the oil pump pressure regulating overflow valve (41).
8. The balance valve factory test bench according to claim 1, characterized in that The circulating cooling module (50) includes a circulating motor (51), a vane pump (52), a cooler (53), a circulating filter (54) and a circulating high-pressure filter (55) which are connected in sequence. An oil suction filter (56) is arranged in the water tank. A ball valve is arranged between the oil suction filter (56) and the circulating motor (51). The water outlet of the cooler (53) is connected with an electromagnetic valve. The water inlet of the cooler (53) is connected with a ball valve, and a ball valve is arranged in parallel on the electromagnetic valve (57).
9. A method for factory testing a balance valve, using the balance valve factory test bench according to any one of claims 1 to 8, characterized in that It includes the following steps: Start the test bench, set the circulating cooling module (50), and control the oil temperature within the set range; Assemble the valve to be tested (3) onto the valve mounting module (10), and start the pump group module (30); Adjust the output pressure of the pump group module (30) through the pump pressure regulating module (40) so that the test circuit of the valve to be tested (3) is communicated with the pump group module (30) and the pump pressure regulating module (40); Adjust the oil pressure of the valve pressure regulating module (20) to the set value of the pressure of the valve to be tested (3); Control the valve to be tested (3) to perform repeated opening and closing actions for a set number of times through the valve mounting solenoid valve (11) to discharge the air brought into the valve during the installation of the valve to be tested (3); Adjust the pressure of the valve to be tested (3) to the set value; Reduce the oil pressure passing through the valve to be tested (3) to 0 through the valve pressure regulating module (20), and then increase it to 85% of the set value of the pressure of the valve to be tested again. Continuously pressurize and maintain for the set time, and record the number of oil drops of the throttle element (14) within the set time; Judge whether the valve to be tested (3) meets the requirements of the valve leakage test according to the number of oil drops.
10. The factory test method of the balance valve according to claim 9, characterized in that Adjusting the pressure of the valve to be tested (3) to the set value includes the following steps: Adjust the pressure value of the valve to be tested (3) from high to low through the pressure regulating bolt until the oil outlet state of the oil fluid at the throttle element (14) changes from dripping to linear, and judge that the pressure of the valve to be tested (3) is adjusted to the set value at this time; Observe the oil pressure at the pressure gauge (12), and automatically adjust the oil pressure passing through the valve under test (3) from 0 to exceed the set value of the valve under test (3) through the valve pressure regulating module (20), and observe during the pressure increase process to determine: whether the oil outlet state at the throttle element (14) is exactly the state of changing from dripping to linear when the set value is reached; If not, re-adjust the pressure value of the valve under test (3) until the above determination requirements are met; If so, perform the valve leakage measurement process.