Injection valve test system and test equipment

Abstract

The utility model discloses an injection valve test system and test equipment. According to the utility model, the injection valve test system comprises an oil tank, a fuel oil path, a sealing oil path and a control oil path; the fuel oil path comprises a fuel oil pipe and a fuel oil booster pump; the sealing oil way comprises a sealing oil pipe and a sealing oil booster pump connected to the sealing oil pipe. The sealing oil pipe is used for introducing oil in the oil tank into the injection valve to form sealing oil; the control oil way comprises a control oil pipe, a control oil booster pump, a pressure sensor, a hydraulic valve and an energy storage oil way located between the pressure sensor and the hydraulic valve and connected to the control oil pipe in parallel. The energy storage oil way comprises an energy accumulator, a first energy storage branch pipe, a second energy storage branch pipe, a one-way valve connected to the first energy storage branch pipe and an energy storage switch valve connected to the second energy storage branch pipe. The opening pressure of the injection valve can be obtained with high precision and high response speed, and the sealing performance and the injection function can be checked.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of injection valve test of gas turbine, especially relates to a kind of injection valve test system and test equipment. BACKGROUND

[0002] Injection valve is used on engine, and is important component, and taking methanol as fuel engine as example, methanol injection valve needs to be used.Methanol is a renewable resource, it is new clean fuel, methanol fuel engine drives internal combustion engine to operate with methanol as fuel.Methanol fuel engine is good in economy, and it is reasonable to burn with diesel as two kinds of fuel, while guaranteeing engine power and speed, gas fuel and liquid fuel can be well avoided in design conflict, and exhaust emission is low, and particulate emission is less.Methanol injection valve is one of important components on diesel engine.Its main function is to disperse methanol into cylinder and mix with air, to facilitate acceleration and complete combustion.If injection state is bad, it can seriously affect fuel utilization, so injection valve needs to be tested regularly. SUMMARY

[0003] The utility model discloses a kind of injection valve test system and test equipment, so that the opening pressure of injection valve can be obtained with high precision, high response speed, and sealing property and injection function are checked.

[0004] To solve the above technical problems, the embodiment of the utility model provides an injection valve test system, comprising: an oil tank, a fuel path, a sealing oil path, and a control oil path;The fuel path, the sealing oil path, and the control oil path are connected to the oil tank;

[0005] The fuel path includes: a fuel pipe and a fuel booster pump connected to the fuel pipe;The fuel pipe is connected to the oil tank upstream, and the downstream of the fuel pipe is used to enter the injection valve, and the fuel pipe is used to form fuel by passing the oil in the oil tank into the injection valve;

[0006] The sealing oil path includes: a sealing oil pipe and a sealing oil booster pump connected to the sealing oil pipe;The upstream of the sealing oil pipe is connected to the oil tank, and the downstream of the sealing oil pipe is used to enter the injection valve, and the sealing oil pipe is used to form sealing oil by passing the oil in the oil tank into the injection valve;

[0007] The control oil circuit comprises a control oil pipe, a control oil booster pump, a pressure sensor and a hydraulic valve connected in sequence from upstream to downstream on the control oil pipe, an energy storage oil circuit located between the pressure sensor and the hydraulic valve and connected in parallel on the control oil pipe; the upstream of the control oil pipe is connected to the oil tank, the downstream of the control oil pipe is connected to the injection valve, the control oil pipe is used to pass the oil in the oil tank to the injection valve to form control oil; the energy storage oil circuit comprises an energy accumulator, a first energy storage branch pipe and a second energy storage branch pipe connected between the energy accumulator and the control oil pipe, a one-way valve connected on the first energy storage branch pipe, and an energy storage switch valve connected on the second energy storage branch pipe.

[0008] When the control oil circuit and the sealing oil circuit are connected to the sealing connector on the valve body of the injection valve, the sealing oil booster pump is used to pass the sealing oil into the injection valve to form a seal, the control oil booster pump is used to pass the control oil into the injection valve and pressurize the injection valve to obtain an opening pressure; the control oil booster pump is used to control the oil pressure of the control oil to a test pressure to test the sealing performance of the injection valve, and the test pressure is smaller than the opening pressure by a preset pressure value.

[0009] When the fuel circuit, the control oil circuit and the sealing oil circuit are connected to the injection valve, the sealing oil booster pump is used to pass the sealing oil into the injection valve to seal the fuel in the injection valve; the control oil booster pump is used to pressurize the control oil and store it in the energy accumulator, control the energy accumulator to release pressure, the hydraulic valve to open, and the energy storage switch valve to open to allow the control oil to drive the piston of the injection valve, and the piston to drive the fuel to be sprayed from the nozzle of the injection valve.

[0010] The utility model discloses a relative prior art, because be provided with fuel oil road, sealing oil circuit, control oil circuit, cooperate through sealing oil circuit and control oil circuit, and sealing oil circuit passes into sealing oil in valve body to seal control oil in control oil circuit in valve body, and the control oil that passes into control oil circuit through control oil booster pump pressurization can be sprayed from the valve nozzle of injection valve, the oil pressure of control oil is the opening pressure of injection valve at this moment, and the opening pressure value can be obtained through pressure sensor. Again, the opening pressure value that obtains lets control oil booster pump pressurization to be less than the test pressure of opening pressure, and whether control oil is sprayed from the nozzle is viewed to detect whether injection valve nozzle leaks. In addition, through the cooperation of fuel oil road, sealing oil circuit, control oil circuit, sealing oil circuit passes into sealing oil in valve body to seal fuel oil in injection valve, first, close hydraulic valve and open energy storage switch valve and let control oil booster pump pressurization pass control oil into energy accumulator energy storage, open hydraulic valve control energy accumulator release pressure and let control oil drive piston to drive fuel oil from the nozzle of injection valve to injection to hydraulic leakage chamber, thereby test injection performance. Further, the opening pressure of injection valve can be tested with high precision and high speed through injection valve test system, whether injection valve leaks and injection function.

[0011] In an embodiment, a first pressure detection table is connected to the fuel oil road, and the first pressure detection table is located downstream of the fuel oil booster pump; a first safety valve is connected in parallel to the fuel oil road;

[0012] A second pressure detection table is connected to the sealing oil road, and the second pressure detection table is located downstream of the sealing oil booster pump; a second safety valve is connected in parallel to the sealing oil road;

[0013] A third safety valve is connected in parallel to the control oil road, and the third safety valve is connected to downstream of the fuel oil booster pump and the energy accumulator;

[0014] The first safety valve, the second safety valve, and the third safety valve are connected to the pipeline.

[0015] In an embodiment, the injection valve test system further comprises a gas discharge test pipeline, and the gas discharge test pipeline comprises a nitrogen booster pump, a first air inlet pipe connected to an air inlet of the nitrogen booster pump, an air outlet pipe connected to an air outlet of the nitrogen booster pump, a nitrogen pressure reducing valve connected to the air outlet pipe, and a fourth safety valve connected to the nitrogen booster pump and the third safety valve.

[0016] In an embodiment, the preset pressure value is 25 bar to 35 bar.

[0017] In an embodiment, the injection valve test system further comprises a second air inlet pipeline, and the second air inlet pipeline is connected to an air pump, and the second air inlet pipeline is connected to the fuel oil booster pump, the sealing oil booster pump, and the control oil booster pump.

[0018] In an embodiment, the fuel booster pump, the sealing oil booster pump and the control oil booster pump are connected to one end of the air pipeline, and an air pressure reducing valve and a pressure detecting table are connected to the one end.

[0019] Another embodiment of the utility model relates to a kind of injection valve test equipment, comprising:

[0020] Injection valve test system as described above;

[0021] Console, the injection valve test system is arranged in the console, and fuel pipe, sealing oil pipe and control oil pipe are stretched from console;

[0022] Workbench;

[0023] Multiple valve seats, the valve seat is arranged on the workbench, for placing injection valve;

[0024] Hydraulic oil leakage chamber, be arranged below the workbench, for the valve nozzle of injection valve insertion and receive the oil that injection valve sprays;And

[0025] Sealing connector, the sealing connector is used to insert the valve body of the injection valve. BRIEF DESCRIPTION OF DRAWINGS

[0026] One or more embodiments are illustrated by way of example in the drawings that are for illustrative purposes only, and these illustrative examples do not constitute a limitation on the embodiments, elements having the same reference numerals in the drawings represent similar elements, unless otherwise specified, the drawings do not constitute a proportion limit.

[0027] Figure 1 It is according to the principle diagram of injection valve test system test opening pressure and test pressure in an embodiment of the utility model;

[0028] Figure 2 It is according to the structural schematic view of sealing connector connection in valve body in an embodiment of the utility model;

[0029] Figure 3 It is according to the principle diagram of injection valve test system test injection function in an embodiment of the utility model;

[0030] Figure 4 It is according to the structural schematic view of injection valve for testing injection function in an embodiment of the utility model;

[0031] Figure 5 It is according to the principle diagram of injection valve test system test degassing function in an embodiment of the utility model;

[0032] Figure 6is according to the structure schematic view of the injection valve test equipment in the embodiment of the utility model;

[0033] Wherein, 100, injection valve test system;200;Injection valve;210;Valve body;220;Piston;230;Top cover;240;Valve nozzle;250;Fuel inlet;260;Control oil inlet;270;Sealing oil inlet;300;Sealing connecting piece;310;Control oil port;320;Sealing oil port;1, oil tank;21, fuel pipe;22, fuel booster pump;31, sealing oil pipe;32, sealing oil booster pump;41, control oil pipe;42, control oil booster pump;43, pressure sensor;44, hydraulic valve;45, energy storage oil way;451, accumulator;452, first energy storage branch pipe;453, second energy storage branch pipe;454, check valve;455, energy storage switch valve;51, first pressure gauge;52, first safety valve;61, second pressure gauge;62, second safety valve;71, third safety valve;81, nitrogen booster pump;82, first air inlet pipe;83, air outlet pipe;84, nitrogen pressure reducing valve;85, fourth safety valve;91, second air inlet pipe;92, air pressure reducing valve;93, pressure gauge;400, injection valve test equipment;410, hydraulic oil leakage chamber;420, gas leakage detector;430, control console;440, workbench;450, valve seat;460, display instrument. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the various embodiments of the utility model, many technical details are proposed in order to make the reader better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed by the present application can be implemented.

[0035] In the following description, certain specific details are set forth in order to provide a thorough understanding of various disclosed embodiments. However, one skilled in the relevant arts will recognize that embodiments can be practiced without one or more of the specific details, or with certain implementations differing from those described herein. In other instances, well-known apparatuses, structures, and techniques have not been shown or described in order to avoid obscuring the description of the embodiments.

[0036] Unless the context clearly requires otherwise, throughout the description and the claims, the words 'comprise', 'comprising', and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

[0037] The embodiments of the present application will be described in detail below with reference to the drawings. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present application, but merely to illustrate the essential spirit of the present application.

[0038] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. In addition, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0039] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the content clearly dictates otherwise.

[0040] In the following description, for the purpose of clarity, directional terms such as "front", "back", "left", "right", "outer", "inner", "outward", "inward", "upper", "lower", etc. will be used to describe the present application. However, it should be noted that these terms are used for convenience only and do not necessarily require a particular orientation of the present application.

[0041] Embodiments of the present application will be described below with reference to the accompanying drawings.

[0042] The first embodiment of the present application relates to a test system 100 for a spray valve 200. As shown in Figure 1 , Figure 3 and Figure 4As shown, the injection valve 200 test system 100 comprises an oil tank 1, a fuel oil circuit, a sealing oil circuit, and a control oil circuit. The fuel oil circuit, the sealing oil circuit, and the control oil circuit are connected to the oil tank 1. The fuel oil circuit comprises a fuel oil pipe 21 and a fuel oil booster pump 22 connected to the fuel oil pipe 21. The fuel oil pipe 21 is connected to the oil tank 1 at an upstream end and is connected to the injection valve 200 at a downstream end, and is used to pass oil in the oil tank 1 to the injection valve 200 to form fuel oil. The sealing oil circuit comprises a sealing oil pipe 31 and a sealing oil booster pump 32 connected to the sealing oil pipe 31. The sealing oil pipe 31 is connected to the oil tank 1 at an upstream end and is connected to the injection valve 200 at a downstream end, and is used to pass oil in the oil tank 1 to the injection valve 200 to form sealing oil. The control oil circuit comprises a control oil pipe 41, a control oil booster pump 42, a pressure sensor 43, and a hydraulic valve 44 connected to the control oil pipe 41 in sequence from upstream to downstream, and an energy storage oil circuit 45 connected between the pressure sensor 43 and the hydraulic valve 44 and connected to the control oil pipe 41 in parallel. The control oil pipe 41 is connected to the oil tank 1 at an upstream end and is connected to the injection valve 200 at a downstream end, and is used to pass oil in the oil tank 1 to the injection valve 200 to form control oil; the energy storage oil circuit 45 comprises an energy accumulator 451, a first energy storage branch pipe 452 and a second energy storage branch pipe 453 connected to the energy accumulator 451 and the control oil pipe 41, a one-way valve 454 connected to the first energy storage branch pipe 452, and an energy storage switch valve 455 connected to the second energy storage branch pipe 453. When the control oil circuit and the sealing oil circuit are configured to be connected to the sealing connector 300 on the valve body 210 of the injection valve 200, the sealing oil booster pump 32 is used to pass the sealing oil to the injection valve 200 to form a seal, and the control oil booster pump 42 is used to pass the control oil to the injection valve 200 and pressurize the injection valve 200 to obtain an opening pressure. The control oil booster pump 42 is used to control the oil pressure of the control oil to a test pressure to test the sealing performance of the injection valve 200, and the test pressure is smaller than the opening pressure by a preset pressure value. When the fuel oil circuit, the control oil circuit, and the sealing oil circuit are configured to be connected to the injection valve 200, the sealing oil booster pump 32 is used to pass the sealing oil to the injection valve 200 to seal the fuel oil in the injection valve 200; the control oil booster pump 42 is used to pressurize the control oil and store it in the energy accumulator 451, and control the energy accumulator 451 to release pressure, the hydraulic valve 44 to open, and the energy storage switch valve 455 to open to allow the control oil to drive the piston 220 of the injection valve 200, and the piston 220 to drive the fuel oil to be sprayed from the nozzle of the injection valve 200. The above-mentioned injection valve 200 can be a methanol injection valve 200. The existing methanol injection valve 200 needs a pressure detection instrument to record the opening value at the moment when the injection valve 200 is opened. Since the time when the injection valve 200 is opened is very short, ordinary pressure instruments cannot normally detect the opening pressure value. In the present embodiment, the opening pressure value can be obtained by controlling the passage of control oil to the injection valve.

[0043] Specifically, as shown inFigure 1 and Figure 2 As shown in FIGS. 1-3, when the opening pressure of the injection valve 200 is obtained by opening test, the top cover 230 and the piston 220 are removed from the injection valve 200, leaving the valve body 210, and then the sealing connector 300 is inserted into the valve body 210, and the sealing connector 300 is locked and sealed with the valve body 210. The sealing connector 300 has a control oil port 310 and a sealing oil port 320. The control oil port 310 is communicated with the inner cavity of the valve body 210, and the sealing oil port 320 is communicated with the sealing oil passage in the valve body 210. The control oil pipe 41 is connected to the control oil port 310, and the control oil enters the inner cavity of the valve body 210. The sealing oil pipe 31 is connected to the sealing oil port 320, and the sealing oil enters the sealing oil passage in the valve body 210. The oil in the oil tank 1 is pressurized by the sealing oil booster pump 32 and enters the valve body 210 through the sealing oil pipe 31, and the control oil is pressurized by the control oil booster pump 42 and enters the inner cavity of the valve body 210 through the hydraulic valve 44. The control oil is sealed in the valve body 210 by the sealing oil, and the control oil pressure is gradually increased by the control oil booster pump 42 until the injection valve 200 reaches the opening pressure. The injection valve 200 sprays oil into the hydraulic oil leakage chamber 410, and the opening pressure of the injection valve 200 is detected by the pressure sensor 43 and recorded on the display instrument 460. At this time, the opening pressure is obtained. When the sealing test of the injection valve 200 is performed, based on the opening pressure test described above, the sealing oil is introduced into the valve body 210 for sealing, and the hydraulic valve 44 is opened. At this time, the control oil pressure of the control oil booster pump 42 is controlled to a test pressure, which is less than the opening pressure. It is checked whether the injection valve 200 nozzle leaks oil. If there is leakage, the injection valve 200 has a problem. If there is no leakage, the sealing of the injection valve 200 is good.

[0044] As shown in FIGS. 1-3, when the opening pressure of the injection valve 200 is obtained by opening test, the top cover 230 and the piston 220 are removed from the injection valve 200, leaving the valve body 210, and then the sealing connector 300 is inserted into the valve body 210, and the sealing connector 300 is locked and sealed with the valve body 210. The sealing connector 300 has a control oil port 310 and a sealing oil port 320. The control oil port 310 is communicated with the inner cavity of the valve body 210, and the sealing oil port 320 is communicated with the sealing oil passage in the valve body 210. The control oil pipe 41 is connected to the control oil port 310, and the control oil enters the inner cavity of the valve body 210. The sealing oil pipe 31 is connected to the sealing oil port 320, and the sealing oil enters the sealing oil passage in the valve body 210. The oil in the oil tank 1 is pressurized by the sealing oil booster pump 32 and enters the valve body 210 through the sealing oil pipe 31, and the control oil is pressurized by the control oil booster pump 42 and enters the inner cavity of the valve body 210 through the hydraulic valve 44. The control oil is sealed in the valve body 210 by the sealing oil, and the control oil pressure is gradually increased by the control oil booster pump 42 until the injection valve 200 reaches the opening pressure. The injection valve 200 sprays oil into the hydraulic oil leakage chamber 410, and the opening pressure of the injection valve 200 is detected by the pressure sensor 43 and recorded on the display instrument 460. At this time, the opening pressure is obtained. When the sealing test of the injection valve 200 is performed, based on the opening pressure test described above, the sealing oil is introduced into the valve body 210 for sealing, and the hydraulic valve 44 is opened. At this time, the control oil pressure of the control oil booster pump 42 is controlled to a test pressure, which is less than the opening pressure. It is checked whether the injection valve 200 nozzle leaks oil. If there is leakage, the injection valve 200 has a problem. If there is no leakage, the sealing of the injection valve 200 is good. Figure 3 and Figure 4 As shown in FIGS. 1-3, when the opening pressure of the injection valve 200 is obtained by opening test, the top cover 230 and the piston 220 are removed from the injection valve 200, leaving the valve body 210, and then the sealing connector 300 is inserted into the valve body 210, and the sealing connector 300 is locked and sealed with the valve body 210. The sealing connector 300 has a control oil port 310 and a sealing oil port 320. The control oil port 310 is communicated with the inner cavity of the valve body 210, and the sealing oil port 320 is communicated with the sealing oil passage in the valve body 210. The control oil pipe 41 is connected to the control oil port 310, and the control oil enters the inner cavity of the valve body 210. The sealing oil pipe 31 is connected to the sealing oil port 320, and the sealing oil enters the sealing oil passage in the valve body 210. The oil in the oil tank 1 is pressurized by the sealing oil booster pump 32 and enters the valve body 210 through the sealing oil pipe 31, and the control oil is pressurized by the control oil booster pump 42 and enters the inner cavity of the valve body 210 through the hydraulic valve 44. The control oil is sealed in the valve body 210 by the sealing oil, and the control oil pressure is gradually increased by the control oil booster pump 42 until the injection valve 200 reaches the opening pressure. The injection valve 200 sprays oil into the hydraulic oil leakage chamber 410, and the opening pressure of the injection valve 200 is detected by the pressure sensor 43 and recorded on the display instrument 460. At this time, the opening pressure is obtained. When the sealing test of the injection valve 200 is performed, based on the opening pressure test described above, the sealing oil is introduced into the valve body 210 for sealing, and the hydraulic valve 44 is opened. At this time, the control oil pressure of the control oil booster pump 42 is controlled to a test pressure, which is less than the opening pressure. It is checked whether the injection valve 200 nozzle leaks oil. If there is leakage, the injection valve 200 has a problem. If there is no leakage, the sealing of the injection valve 200 is good.

[0045] Due to the fuel oil path, sealing oil path, control oil path, through the cooperation of the sealing oil path and the control oil path, the sealing oil path is connected to the valve body 210 to seal the control oil in the valve body 210, and the control oil in the control oil path can be sprayed from the nozzle 240 of the injection valve 200 through the control oil booster pump 42, at this time the oil pressure of the control oil is the opening pressure of the injection valve 200, and the opening pressure value can be obtained through the pressure sensor 43. Then, the control oil booster pump 42 is pressurized to a test pressure less than the opening pressure by the obtained opening pressure value, and it is checked whether the control oil is sprayed from the nozzle to detect whether the injection valve 200 nozzle leaks. In addition, through the cooperation of the fuel oil path, the sealing oil path, and the control oil path, the sealing oil path is connected to the valve body 210 to seal the fuel oil in the injection valve 200, the hydraulic valve 44 is closed and the energy storage switch valve 455 is opened to allow the control oil booster pump 42 to pressurize the control oil to be stored in the accumulator 451, and the hydraulic valve 44 is opened to release the pressure of the accumulator 451 to drive the control oil to drive the piston 220 to drive the fuel oil to be sprayed from the nozzle of the injection valve 200 to the hydraulic oil leakage chamber 410, thereby testing the injection performance. Further, the injection valve 200 test system 100 can test the opening pressure of the injection valve 200 with high precision and high speed, test whether the injection valve 200 leaks, and test the injection function.

[0046] Further, as shown in Figure 1 、 Figure 3 and Figure 4 , a first pressure detection table 9351 is connected to the fuel oil path, the first pressure detection table 9351 is located downstream of the fuel oil booster pump 22, and a first safety valve 52 is connected in parallel to the fuel oil path. A second pressure detection table 9361 is connected to the sealing oil path, the second pressure detection table 9361 is located downstream of the sealing oil booster pump 32, and a second safety valve 62 is connected in parallel to the sealing oil path. A third safety valve 71 is connected in parallel to the control oil path, and the third safety valve 71 is connected to the downstream of the fuel oil booster pump 22 and the accumulator 451. The first safety valve 52, the second safety valve 62, and the third safety valve 71 are connected to the pipeline. Thus, the pressure of the pipeline is prevented from being too high, and the first safety valve 52, the second safety valve 62, and the third safety valve 71 can be pressure relief when the pressure is too high.

[0047] In addition, the preset pressure value is 25bar to 35bar, and the preferred preset pressure value is 30bar.

[0048] In addition, as shown in Figure 4As shown in the drawings, the injection valve 200 test system 100 further comprises a gas release test pipeline, which comprises a nitrogen booster pump 81, a first inlet pipe 82 connected to the gas inlet of the nitrogen booster pump 81, an outlet pipe 83 connected to the gas outlet of the nitrogen booster pump 81, a nitrogen pressure reducing valve 84 connected to the outlet pipe 83, and a fourth safety valve 85 connected between the nitrogen booster pump 81 and the third safety valve 71. When the gas release function is tested, the sealing surface of the injection valve 200 is inserted into the gas leakage detector 420 through the communication pipe, the gas leakage detector 420 prevents water, the control oil pipe 41 and the outlet pipe 83 are connected to the injection valve 200, the nitrogen booster pump 81 inputs low-pressure nitrogen into the injection valve 200 and pressurizes, the nitrogen is reduced to the required pressure through the nitrogen pressure reducing valve 84, and the control oil booster pump 42 is used to control the injection valve 200. If the sealing surface of the injection valve 200 leaks, bubbles will be present in the gas leakage detector 420.

[0049] Further, as shown in the drawings, Figure 1 、 Figure 3 and Figure 4 , the injection valve 200 test system 100 further comprises a second inlet pipeline 91 connected to the air pump, and the second inlet pipeline 91 is connected to the fuel booster pump 22, the sealing oil booster pump 32 and the control oil booster pump 42. The second inlet pipeline 91 is used to input compressed air to discharge the oil or gas in each pipeline.

[0050] In addition, as shown in the drawings, Figure 1 、 Figure 3 and Figure 4 , the fuel booster pump 22, the sealing oil booster pump 32 and the control oil booster pump 42 are connected to one end of the inlet pipeline, and the air pressure reducing valve 92 and the pressure detector 93 are connected to the one end of the inlet pipeline.

[0051] The second embodiment of the utility model relates to a kind of injection valve 200 injection pressure test methods. The injection valve 200 test system 100 in the first embodiment is used to test the injection pressure of injection valve 200, as shown in the drawings, Figure 1 and Figure 3 , the pressure test method comprises:

[0052] Step 110, the valve nozzle 240 of injection valve 200 is inserted into hydraulic oil leakage chamber 410;

[0053] Step 120, remove the top cover 230 of injection valve 200 and insert the sealing connector 300 into the valve body 210 of injection valve 200;

[0054] Step 130, control oil pipe 41 and sealing oil pipe 31 are connected to sealing connector 300;

[0055] Step 140, control sealing oil booster pump 32 to pass the oil of oil tank 1 into valve body 210 through sealing oil pipe 31.

[0056] Step 150, control the control oil booster pump 42 to pass the oil tank 1 through the control oil pipe 41 into the valve body 210, and gradually pressurize to the oil input from the nozzle 240 of the injection valve 200, obtain the opening pressure of the injection valve 200. Specifically, the pressure sensor 43 can detect the opening pressure displayed on the display instrument 460, at which time the opening pressure is obtained. The above method has been described in the first embodiment and will not be described in detail here.

[0057] In addition, as shown in Figure 1 and Figure 3 When testing the sealing of the injection valve 200, based on the opening pressure test, after obtaining the opening pressure of the injection valve 200, the control oil booster pump 42 is controlled to pressurize the oil in the control oil pipe 41 to a test pressure, and the test pressure is 25bar to 35bar less than the opening pressure. Test whether the oil in the control oil pipe 41 is injected from the nozzle 240 of the injection valve 200 to the hydraulic oil leakage chamber 410, if there is oil leakage, the sealing of the injection valve 200 is problematic, and if there is no oil injection, the sealing is good.

[0058] Since the first embodiment corresponds to the present embodiment, the present embodiment can be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still valid in the present embodiment, and the technical effects achieved in the first embodiment can also be achieved in the present embodiment. In order to reduce repetition, it will not be described here. Correspondingly, the related technical details mentioned in the present embodiment can also be applied in the first embodiment.

[0059] The third embodiment of the utility model relates to a function test method of injection valve 200. The injection valve 200 test system 100 in the first embodiment is used for the function test of injection valve 200, as shown in Figure 2 and Figure 4 The function test method comprises:

[0060] Step 210, the nozzle 240 of the injection valve 200 is inserted into the hydraulic oil leakage chamber 410;

[0061] Step 220, connect the control oil pipe 41 to the control oil inlet 260 of the injection valve 200;

[0062] Step 230, connect the sealing oil pipe 31 to the sealing oil inlet 270 of the injection valve 200;

[0063] Step 240, connect the fuel pipe 21 to the fuel inlet 250 of the injection valve 200;

[0064] Step 250, control the fuel booster pump 22 to pass the oil tank 1 through the fuel pipe 21 into the injection valve 200;

[0065] Step 260, control the sealing oil booster pump 32 to pass the oil in the oil tank 1 through the sealing pipe into the injection valve 200, and pass the fuel pipe 21 into the fuel sealing in the injection valve 200;

[0066] Step 270, close the hydraulic valve 44, and control the control oil booster pump 42 to pass the oil in the oil tank 1 through the control oil pipe 41 into the accumulator 451;

[0067] Step 280, open the hydraulic valve 44, release the pressure through the accumulator 451 to drive the piston 220 of the injection valve 200 with the control oil, so that the fuel is injected from the nozzle of the injection valve 200 to the hydraulic oil leakage chamber 410. In this test, the fuel can be injected by the control oil as the driving power, so that the injection performance of the injection valve 200 can be tested. The above method has been described in the first embodiment and will not be described in detail here.

[0068] Since the first embodiment and the present embodiment correspond to each other, the present embodiment can be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still valid in the present embodiment, and the technical effects achieved in the first embodiment can also be achieved in the present embodiment. In order to reduce repetition, it will not be described here. Correspondingly, the related technical details mentioned in the present embodiment can also be applied in the first embodiment.

[0069] The fourth embodiment of the utility model relates to a kind of injection valve 200 test equipment. As shown in Figure 14, the injection valve 200 test equipment includes injection valve 200, hydraulic oil leakage chamber 410, hydraulic valve 44, control oil booster pump 42, control oil pipe 41, accumulator 451, sealing oil booster pump 32 and sealing pipe 31. Figure 1 、 Figure 3 、 Figure 4 、 Figure 6As shown, the injection valve 200 test equipment includes the injection valve 200 test system 100 in the first embodiment, a console 430, a workbench 440, a plurality of valve seats 450, and a hydraulic oil leakage chamber 410. The injection valve 200 test system 100 is arranged in the console 430, and the fuel pipe 21, the sealing oil pipe 31, and the control oil pipe 41 extend from the console 430. The gas outlet pipe 83 for nitrogen input of the injection valve 200 also extends from the console 430 and can be connected to the valve nozzle 240. The console 430 is provided with display instruments 460 to display the opening pressure, test pressure, and other pressure conditions, and the fuel booster pump 22, the control oil booster pump 42, the sealing oil booster pump 32, the hydraulic valve 44, and the like are controlled through the console 430. The valve seats 450 are arranged on the workbench 440 and are used to place the injection valve 200. The valve seats 450 are multiple and can be of different types to match different injection valves 200. The hydraulic oil leakage chamber 410 is arranged below the workbench 440 and is used for the valve nozzle 240 of the injection valve 200 to be inserted and receive the oil sprayed by the injection valve 200. The sealing connector 300 is used to be inserted into the valve body 210 of the injection valve 200 and can be used in the opening pressure test and the sealing test, but is not used in the injection function test, that is, the use of the sealing connector 300 is selected according to the requirement.

[0070] The injection valve 200 test equipment also includes a gas leakage detector 420 used to contain water and selected to be used in the air release function test. The sealing surface of the injection valve 200 is connected to the gas pipe and enters the gas leakage detector 420. If there is leakage, the nitrogen gas from the injection nozzle of the injection valve 200 enters the sealing surface and then enters the gas leakage detector 420, and at this time, bubbles are generated. That is, in different tests, the components such as the gas leakage detector 420, the hydraulic oil leakage chamber 410, and the sealing connector 300 are selected to be matched.

[0071] Since the first embodiment corresponds to the present embodiment, the present embodiment can be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still valid in the present embodiment, and the technical effects achieved in the first embodiment can also be achieved in the present embodiment. In order to reduce repetition, they will not be described here. Correspondingly, the related technical details mentioned in the present embodiment can also be applied in the first embodiment.

[0072] The preferred embodiments of the utility model have been described in detail above, but it should be understood that, if necessary, aspects of the embodiments can be modified to adopt aspects, features, and concepts of various patents, applications, and publications to provide additional embodiments.

[0073] These and other changes can be made to the embodiments in light of the detailed description. In general, the chosen language of the claims should be construed as encompassing all possibilities in light of the disclosure of the specification and claims.

[0074] Those skilled in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the utility model, and in actual application, various changes can be made to them in form and details without departing from the spirit and scope of the utility model.

Claims

1. A spray valve testing system characterized by, The oil tank, fuel oil path, sealing oil path, and control oil path are connected to the oil tank. The fuel oil path comprises a fuel oil pipe and a fuel oil booster pump connected to the fuel oil pipe; the fuel oil pipe is connected to the oil tank at the upstream and is connected to the injection valve at the downstream; the fuel oil pipe is used to pass the oil in the oil tank to the injection valve to form fuel oil. The sealing oil path comprises a sealing oil pipe and a sealing oil booster pump connected to the sealing oil pipe; the sealing oil pipe is connected to the oil tank at the upstream and is connected to the injection valve at the downstream; the sealing oil pipe is used to pass the oil in the oil tank to the injection valve to form sealing oil. The control oil path comprises a control oil pipe, a control oil booster pump, a pressure sensor, a hydraulic valve connected to the control oil pipe in sequence from upstream to downstream, and an energy storage oil path connected between the pressure sensor and the hydraulic valve and in parallel to the control oil pipe; the control oil pipe is connected to the oil tank at the upstream and is connected to the injection valve at the downstream; the control oil pipe is used to pass the oil in the oil tank to the injection valve to form control oil; the energy storage oil path comprises an energy accumulator, a first energy storage branch pipe and a second energy storage branch pipe connecting the energy accumulator and the control oil pipe, a one-way valve connected to the first energy storage branch pipe, and an energy storage switch valve connected to the second energy storage branch pipe. When the control oil path and the sealing oil path are connected to the sealing connector on the valve body of the injection valve, the sealing oil booster pump is used to pass the sealing oil to the injection valve to form a seal, and the control oil booster pump is used to pass the control oil to the injection valve and pressurize the injection valve to spray to obtain an opening pressure; the control oil booster pump is used to control the oil pressure of the control oil to a test pressure to test the sealing performance of the injection valve, and the test pressure is smaller than the opening pressure by a preset pressure value. When the fuel oil path, the control oil path, and the sealing oil path are connected to the injection valve, the sealing oil booster pump is used to pass the sealing oil to the injection valve to seal the fuel oil in the injection valve; the control oil booster pump is used to pressurize the control oil and store it in the energy accumulator, control the energy accumulator to release pressure, the hydraulic valve to open, and the energy storage switch valve to open to allow the control oil to drive the piston of the injection valve, and the piston to drive the fuel oil to be sprayed from the nozzle of the injection valve. A first pressure detection table is connected to the fuel oil path and is located downstream of the fuel oil booster pump; a first safety valve is connected in parallel to the fuel oil path. A second pressure detection table is connected to the sealing oil path and is located downstream of the sealing oil booster pump; a second safety valve is connected in parallel to the sealing oil path.

2. The injection valve testing system of claim 1, wherein A third safety valve is connected in parallel to the control oil path, is connected downstream of the fuel oil booster pump, and is connected to the energy accumulator. The first safety valve, the second safety valve, and the third safety valve are connected to the same pipeline. ​ ​ 3. The injection valve testing system of claim 2, wherein, The injection valve test system further comprises a nitrogen bleeding test pipeline, which comprises a nitrogen booster pump, a first air inlet pipe connected to an air inlet of the nitrogen booster pump, an air outlet pipe connected to an air outlet of the nitrogen booster pump, a nitrogen pressure reducing valve connected to the air outlet pipe, and a fourth safety valve connected between the nitrogen booster pump and the third safety valve.

4. The injection valve testing system of claim 1, wherein The preset pressure value is 25-35 bar.

5. The injection valve testing system of claim 1, wherein The injection valve test system further comprises a second air inlet pipeline, which is connected to an air pump and is connected to the fuel booster pump, the sealing oil booster pump and the control oil booster pump.

6. The injection valve testing system of claim 5, wherein, The fuel booster pump, the sealing oil booster pump and the control oil booster pump are connected to one end of the air inlet pipeline, and an air pressure reducing valve and a pressure detection table are connected to the one end.

7. A test apparatus for an injection valve, characterized by The injection valve test system comprises: The injection valve test system according to any one of claims 1-6; A console, wherein the injection valve test system is arranged in the console, and fuel pipes, sealing oil pipes and control oil pipes extend from the console; A workbench; A plurality of valve seats arranged on the workbench for placing injection valves; A hydraulic oil leakage chamber arranged below the workbench for inserting a valve nozzle of an injection valve and receiving oil sprayed by the injection valve; and A sealing connector for inserting into a valve body of the injection valve.

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