CN112729799A - System and method for detecting assembly quality of oil storage barrel and one-way valve in fuel pump assembly - Google Patents
System and method for detecting assembly quality of oil storage barrel and one-way valve in fuel pump assembly Download PDFInfo
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- CN112729799A CN112729799A CN202011577286.1A CN202011577286A CN112729799A CN 112729799 A CN112729799 A CN 112729799A CN 202011577286 A CN202011577286 A CN 202011577286A CN 112729799 A CN112729799 A CN 112729799A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
Abstract
The invention discloses a system for detecting the assembly quality of an oil storage barrel and a check valve in a fuel pump assembly, which comprises: one end of the hollow tubular testing sealing head is hermetically connected with the oil storage barrel, and the other end of the hollow tubular testing sealing head is provided with a gas inlet; the positive pressure test gas circuit simulates the opening force applied when the check valve is opened in the working process of the fuel pump assembly and detects the positive pressure of the positive pressure test gas circuit and the gas flow passing through the check valve when the check valve is opened; the negative pressure test gas circuit simulates the closing force applied when the one-way valve is closed in the working process of the fuel pump assembly and detects the negative pressure of the negative pressure test gas circuit and the gas flow passing through the one-way valve when the one-way valve is closed; and the control unit is used for controlling the states of the positive pressure test air path and the negative pressure test air path and judging the opening degree and the closing degree of the one-way valve according to the air flow of the one-way valve. The invention can flexibly and reliably test the assembly effect of the check valve and the oil storage barrel, and ensure the performance requirement of the fuel pump assembly, thereby being widely applied to the production line of the fuel pump assembly.
Description
Technical Field
The invention relates to a detection technology, in particular to a system and a method for detecting the assembly quality of an oil storage barrel and a one-way valve in a fuel pump assembly.
Background
At present, China has become the country with the largest automobile keeping quantity in the world, and the automobile is rapidly increased every year, so that the safety performance of the automobile is more and more concerned by people.
The fuel system of the vehicle is a safety element, and the performance requirement is very strict. Fuel pump assemblies are one of the important components of an injection system for an automotive engine, and the mass of the fuel pump is directly related to the operational stability of the automotive engine. The fuel pump of the automobile not only ensures the supply of fuel required by an engine, but also ensures that serious safety defects such as leakage and the like cannot occur, thereby ensuring the safe operation of the whole automobile.
When the fuel pump assembly is designed, the bottom of the oil storage barrel 1 is provided with a one-way valve 2, and the one-way valve 2 is required to be reliably opened when needing to be opened and can be completely closed when needing to be closed.
The assembly effect of the check valve 2 and the oil storage barrel 1 is shown in fig. 1, but in the actual assembly process, whether the assembly quality of the check valve and the oil storage barrel can ensure that the check valve meets the working requirements cannot be judged, so that the risk of failure of the assembled check valve exists.
Disclosure of Invention
The invention aims to provide a system and a method for detecting the assembly quality of an oil storage barrel and a one-way valve in a fuel pump assembly, and can solve the problem that the assembly effect of the oil storage barrel and the one-way valve cannot be accurately detected at present.
In order to solve the above technical problem, the present invention provides a system for detecting the quality of the assembly of an oil storage barrel and a check valve in a fuel pump assembly, comprising:
the testing sealing head is in a hollow tubular shape, one end of the testing sealing head is in sealing connection with the oil storage barrel, the other end of the testing sealing head is provided with a gas inlet, and the gas inlets are connected with the positive pressure testing gas path and the negative pressure testing gas path;
the positive pressure test gas circuit is used for simulating the opening force applied when the check valve is opened in the working state of the fuel pump assembly and detecting the positive pressure of the positive pressure test gas circuit and the gas flow passing through the check valve when the check valve is opened;
the negative pressure test gas circuit is used for simulating the closing force applied when the one-way valve is closed in the working state of the fuel pump assembly and detecting the negative pressure of the negative pressure test gas circuit and the gas flow passing through the one-way valve when the one-way valve is closed;
and the control unit is used for controlling the states of the positive pressure test air path and the negative pressure test air path, judging the opening degree of the one-way valve according to the gas flow passing through the one-way valve when the one-way valve is opened, and judging the closing degree of the one-way valve according to the gas flow passing through the one-way valve when the one-way valve is closed.
Furthermore, the positive pressure test gas circuit and the negative pressure test gas circuit share a positive pressure gas source.
The preferred, malleation test gas circuit includes malleation test solenoid valve, malleation test stop valve, malleation test pressure switch and malleation test flowmeter, malleation test solenoid valve malleation test flowmeter with malleation test stop valve passes through the trachea and establishes ties in proper order and is in the malleation air supply with between the gas inlet of test sealing head, malleation test pressure switch connects in parallel malleation test solenoid valve with between the malleation test flowmeter, malleation test solenoid valve malleation test stop valve malleation test pressure switch malleation test flowmeter all links to each other with the control unit.
Preferably, the positive pressure test gas circuit further comprises a positive pressure test pressure regulating valve, the positive pressure test pressure regulating valve is connected in series between the positive pressure test electromagnetic valve and the positive pressure test flowmeter, and the positive pressure test pressure switch is connected in parallel between the positive pressure test pressure regulating valve and the positive pressure test flowmeter. Furthermore, the positive pressure test pressure regulating valve is a mechanical pressure regulating valve or an electronic pressure regulating valve connected with the control unit.
Preferably, the negative pressure test gas circuit comprises a negative pressure test solenoid valve, a negative pressure test stop valve, a negative pressure test pressure switch, a negative pressure test flowmeter and a negative pressure generator, the negative pressure test solenoid valve, the negative pressure generator, the negative pressure test flowmeter and the negative pressure test stop valve are sequentially connected in series between the positive pressure gas source and a gas inlet of the test sealing head through gas pipes, the negative pressure test pressure switch is connected in parallel between the negative pressure generator and the negative pressure test flowmeter, and the negative pressure test solenoid valve, the negative pressure test stop valve, the negative pressure test pressure switch and the negative pressure test flowmeter are all connected with the control unit.
Preferably, the negative pressure test gas circuit further comprises a negative pressure test pressure regulating valve, the negative pressure test pressure regulating valve is connected in series between the negative pressure generator and the negative pressure test flowmeter, and the negative pressure test pressure switch is connected in parallel between the negative pressure test pressure regulating valve and the negative pressure test flowmeter. Furthermore, the negative pressure test pressure regulating valve is a mechanical pressure regulating valve or an electronic pressure regulating valve connected with the control unit.
Further, the positive pressure test gas circuit with a filter is shared to the negative pressure test gas circuit, the gas outlet of filter with the gas inlet lug connection of test sealing head or through the trachea intercommunication, the air inlet of filter respectively with the positive pressure test stop valve with the negative pressure test stop valve intercommunication.
In order to solve the technical problem, the method for detecting the assembling quality of the oil storage barrel and the check valve in the fuel pump assembly provided by the invention comprises the following steps:
step S1, the assembly quality of the oil storage barrel and the one-way valve is subjected to positive pressure test, wherein:
step S11, the control unit opens the positive pressure test gas path;
step S12, detecting the positive pressure of the positive pressure test gas path and the gas flow passing through the one-way valve in the set sampling time, and transmitting the detection result to the control unit;
step S13, the control unit judges the collected positive pressure of the positive pressure test gas path and the gas flow passing through the one-way valve, if the positive pressure is always in the set positive pressure range in the sampling time and the gas flow passing through the one-way valve is not less than the preset valve opening threshold value, the control unit judges that the one-way valve can be reliably opened, otherwise, the control unit judges that the one-way valve can not be reliably opened;
step S14, the control unit closes the positive pressure test gas circuit;
step S2, the assembly quality of the oil storage barrel and the one-way valve is tested under negative pressure, wherein:
step S21, the control unit opens the negative pressure test air path;
step S22, detecting the negative pressure of the negative pressure test gas circuit and the gas flow passing through the one-way valve in the set sampling time, and transmitting the detection result to the control unit;
step S23, the control unit judges the collected negative pressure of the negative pressure test gas path and the gas flow passing through the one-way valve, if the negative pressure is always in the set negative pressure range in the sampling time and the gas flow passing through the one-way valve is not more than the preset valve closing threshold value, the control unit judges that the one-way valve can be reliably closed, otherwise, the control unit judges that the one-way valve can not be reliably closed;
and step S24, the control unit closes the negative pressure test air passage.
Further, in step S1, the positive pressure test circuit is opened and kept running for a set time, and then the positive pressure of the positive pressure test circuit and the flow rate of the gas passing through the check valve are detected.
Further, in step S2, the negative pressure test circuit is opened and kept running for a set time, and then the negative pressure of the negative pressure test circuit and the gas flow rate passing through the check valve are detected.
Preferably, the positive pressure test in the detection method of the system for detecting the assembly quality of the oil storage barrel and the check valve in the fuel pump assembly of the invention comprises the following steps:
step A1, the control unit controls the positive pressure test electromagnetic valve to open;
step A2, after the first positive pressure running time, the control unit controls the positive pressure test stop valve to open;
step A3, after the second positive pressure running time, the control unit collects the positive pressure signal of the positive pressure test pressure switch and the flow signal of the positive pressure test flowmeter according to the set sampling time;
step A4, judging the collected positive pressure signal and flow signal by the control unit, if the positive pressure signal is always in the set positive pressure range and the flow signal is not less than the preset valve opening threshold value in the sampling time, judging that the one-way valve can be reliably opened by the control unit, otherwise judging that the one-way valve cannot be reliably opened by the control unit;
step A5, the control unit controls the positive pressure test stop valve to close;
step A6, the control unit controls the positive pressure test solenoid valve to close.
Preferably, the negative pressure test in the detection method of the detection system for the assembly quality of the oil storage barrel and the check valve in the fuel pump assembly of the invention comprises the following steps:
step B1, the control unit controls the negative pressure test electromagnetic valve to open;
step B2, after the first negative pressure operation time, the control unit controls the negative pressure test stop valve to open;
step B3, after the second negative pressure operation time, the control unit collects the negative pressure signal of the negative pressure test pressure switch and the flow signal of the negative pressure test flowmeter according to the set sampling time;
step B4, the control unit judges the collected negative pressure signal and flow signal, if the negative pressure signal is always in the set negative pressure range and the flow signal is not more than the preset valve closing threshold value in the sampling time, the control unit judges that the one-way valve can be reliably closed, otherwise, the control unit judges that the one-way valve can not be reliably closed;
step B5, the control unit controls the negative pressure test electromagnetic valve to close;
and step B6, the control unit controls the negative pressure test stop valve to close.
Further, the positive pressure test in the detection method of the detection system for the assembly quality of the oil storage barrel and the check valve in the fuel pump assembly comprises the following steps:
step A1', adjusting the positive pressure of the positive pressure test air path by using the positive pressure test pressure regulating valve;
step A2', the control unit controls the positive pressure test electromagnetic valve to open;
step A3', after the first positive pressure running time, the control unit controls the positive pressure test stop valve to open;
step A4', after the second positive pressure running time, the control unit collects the positive pressure signal of the positive pressure test pressure switch and the flow signal of the positive pressure test flowmeter according to the set sampling time;
step A5', the control unit judges the collected positive pressure signal and flow signal, if the positive pressure signal is always in the set positive pressure range and the flow signal is not less than the preset valve opening threshold value in the sampling time, the control unit judges that the one-way valve can be reliably opened, otherwise, the control unit judges that the one-way valve can not be reliably opened;
step A6', the control unit controls the positive pressure test stop valve to close;
step a7', the control unit controls the positive pressure test solenoid valve to close.
Further, the negative pressure test in the detection method of the detection system for the assembly quality of the oil storage barrel and the check valve in the fuel pump assembly comprises the following steps:
step B1', adjusting the negative pressure of the negative pressure test air path by using the negative pressure test pressure regulating valve;
step B2', the control unit controls the negative pressure test electromagnetic valve to open;
step B3', after the first negative pressure operation time, the control unit controls the negative pressure test stop valve to open;
step B4', after the second negative pressure operation time, the control unit collects the negative pressure signal of the negative pressure test pressure switch and the flow signal of the negative pressure test flowmeter according to the set sampling time;
step B5', the control unit judges the collected negative pressure signal and flow signal, if the negative pressure signal is always in the set negative pressure range and the flow signal is not more than the preset valve closing threshold value in the sampling time, the control unit judges that the one-way valve can be reliably closed, otherwise, the control unit judges that the one-way valve can not be reliably closed;
step B6', the control unit controls the negative pressure test electromagnetic valve to close;
and step B7', the control unit controls the negative pressure test stop valve to be closed.
The invention detects whether the one-way valve can be reliably opened under the condition of needing to be opened or not through the gas flow state in the positive pressure test gas circuit, and simultaneously detects whether the one-way valve can be reliably closed under the condition of needing to be closed or not through the gas flow state in the negative pressure test gas circuit, thereby flexibly and reliably testing the assembly effect of the one-way valve and the oil storage barrel, ensuring the performance requirement of the fuel pump assembly and being widely applied to the production line of the fuel pump assembly.
Drawings
FIG. 1 is a schematic view of the assembly of a check valve with a storage barrel;
FIG. 2 is a schematic view of a mechanical linkage in the detection system of the present invention;
FIG. 3 is a block diagram of a detection system according to the present invention;
FIG. 4 is a block diagram of another embodiment of the detection system of the present invention;
FIG. 5 is a flow chart of a positive pressure test of a first embodiment of a method of testing the quality of a fuel reservoir and check valve assembly in a fuel pump assembly in accordance with the present invention;
FIG. 6 is a flow chart of a negative pressure test in a first embodiment of a method of testing the quality of the assembly of a fuel reservoir and check valve in a fuel pump assembly of the present invention;
FIG. 7 is a flow chart of a positive pressure test of a second embodiment of a method of testing the quality of the assembly of a reservoir and check valve in a fuel pump assembly in accordance with the present invention;
FIG. 8 is a flow chart of a negative pressure test in a second embodiment of a method of testing the quality of the assembly of a fuel reservoir and check valve in a fuel pump assembly of the present invention;
FIG. 9 is a flow chart of a positive pressure test of a third embodiment of a method of testing the quality of the assembly of a reservoir and check valve in a fuel pump assembly in accordance with the present invention;
FIG. 10 is a flow chart of a negative pressure test in a third embodiment of a method of testing the quality of the assembly of a reservoir and check valve in a fuel pump assembly of the present invention.
Wherein the reference numerals are as follows:
1 oil storage barrel 2 is a one-way valve
3 test sealing head
G negative pressure generator F filter
A1 positive pressure test solenoid valve A2 negative pressure test solenoid valve
B1 positive pressure test flowmeter B2 negative pressure test flowmeter
C1 positive pressure test pressure switch C2 negative pressure test pressure switch
Q1 positive pressure test stop valve Q2 negative pressure test stop valve
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, which is set forth in the following detailed description of the preferred embodiments of the invention and the accompanying drawings. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit of the present invention.
First embodiment
The detecting system of oil storage bucket and check valve assembly quality in the fuel pump assembly of this embodiment includes:
the testing sealing head 3 is in a hollow tubular shape, one end of the testing sealing head 3 is in sealing connection with the oil storage barrel 1, and the other end of the testing sealing head is provided with a gas inlet which is connected with a positive pressure testing gas path and a negative pressure testing gas path as shown in fig. 2;
the positive pressure test gas circuit is used for simulating the opening force applied when the check valve 2 is opened in the working state of the fuel pump assembly and detecting the positive pressure of the positive pressure test gas circuit and the gas flow passing through the check valve 2 when the check valve 2 is opened;
the negative pressure test gas circuit is used for simulating the closing force applied when the check valve 2 is closed in the working state of the fuel pump assembly and detecting the negative pressure of the negative pressure test gas circuit and the gas flow passing through the check valve 2 when the check valve 2 is closed;
and the control unit is used for controlling the states of the positive pressure test air path and the negative pressure test air path, judging the opening degree of the one-way valve 2 according to the gas flow passing through the one-way valve 2 when the one-way valve 2 is opened, and judging the closing degree of the one-way valve 2 according to the gas flow passing through the one-way valve 2 when the one-way valve 2 is closed.
The method for detecting the assembly quality of the check valve and the oil storage barrel by adopting the detection system comprises the following steps:
step S1, a positive pressure test is performed on the quality of the assembly of the oil storage barrel and the check valve, as shown in fig. 5, wherein:
step S11, the control unit opens the positive pressure test gas path;
step S12, detecting the positive pressure of the positive pressure test gas path and the gas flow passing through the one-way valve in the set sampling time, and transmitting the detection result to the control unit;
step S13, the control unit judges the collected positive pressure of the positive pressure test gas path and the gas flow passing through the one-way valve, if the positive pressure is always in the set positive pressure range in the sampling time and the gas flow passing through the one-way valve is not less than the preset valve opening threshold, the control unit judges that the one-way valve can be reliably opened, otherwise, if the positive pressure exceeds the set positive pressure range in the sampling time or the gas flow passing through the one-way valve is less than the preset valve opening threshold in the sampling time, the control unit judges that the one-way valve can not be reliably opened;
step S14, the control unit closes the positive pressure test gas circuit;
step S2, performing a negative pressure test on the assembly quality of the oil storage barrel and the check valve, as shown in fig. 6, wherein:
step S21, the control unit opens the negative pressure test air path;
step S22, detecting the negative pressure of the negative pressure test gas circuit and the gas flow passing through the one-way valve in the set sampling time, and transmitting the detection result to the control unit;
step S23, the control unit judges the collected negative pressure of the negative pressure test gas path and the gas flow passing through the one-way valve, if the negative pressure is always in the set negative pressure range in the sampling time and the gas flow passing through the one-way valve is not more than the preset valve closing threshold, the control unit judges that the one-way valve can be reliably closed, otherwise, if the negative pressure exceeds the set negative pressure range in the sampling time or the gas flow passing through the one-way valve is more than the preset valve closing threshold in the sampling time, the control unit judges that the one-way valve can not be reliably closed;
and step S24, the control unit closes the negative pressure test air passage.
Further, in step S1, the positive pressure test circuit is opened and kept running for a set time, and then the positive pressure of the positive pressure test circuit and the gas flow passing through the check valve are detected, and similarly, in step S2, the negative pressure test circuit is opened and kept running for a set time, and then the negative pressure of the negative pressure test circuit and the gas flow passing through the check valve are detected, so that a more reliable and stable test result can be obtained.
Second embodiment
In this embodiment, the system for detecting the assembly quality of the oil storage barrel and the check valve in the fuel pump assembly comprises a test sealing head 3, a positive pressure test air path, a negative pressure test air path and a control unit. The test sealing head 3 is a hollow pipe, one end of which is connected with the oil storage barrel 1 in a sealing way, and the other end of which is provided with a gas inlet, as shown in figure 2. The positive pressure test gas circuit and the negative pressure test gas circuit share a positive pressure gas source.
As shown in fig. 3, the positive pressure test air circuit includes a positive pressure test solenoid valve a1, a positive pressure test stop valve Q1, a positive pressure test pressure switch C1, and a positive pressure test flow meter B1, and the positive pressure test solenoid valve a1, the positive pressure test stop valve Q1, the positive pressure test pressure switch C1, and the positive pressure test flow meter B1 are all connected to the control unit. The positive pressure test solenoid valve A1 the positive pressure test flowmeter B1 with positive pressure test stop valve Q1 is in through the trachea in proper order the positive pressure air supply with between the gas inlet of test sealing head, positive pressure test pressure switch C1 is parallelly connected positive pressure test solenoid valve A1 with between the positive pressure test flowmeter B1. The positive pressure test electromagnetic valve A1 and the positive pressure test stop valve Q1 are in an open state during positive pressure test, and are in a closed state at other times.
As shown in fig. 3, the negative pressure test air circuit includes a negative pressure test solenoid valve a2, a negative pressure test stop valve Q2, a negative pressure test pressure switch C2, a negative pressure test flow meter B2 and a negative pressure generator G, and the negative pressure test solenoid valve a2, the negative pressure test stop valve Q2, the negative pressure test pressure switch C2 and the negative pressure test flow meter B2 are all connected to the control unit. The negative pressure test electromagnetic valve A2, the negative pressure generator G, the negative pressure test flowmeter B2 and the negative pressure test stop valve Q2 are sequentially connected in series between the positive pressure air source and the gas inlet of the test sealing head through an air pipe, and the negative pressure test pressure switch C2 is connected in parallel between the negative pressure generator G and the negative pressure test flowmeter B2. The negative pressure generator G generates the negative pressure of the test according to bernoulli's principle. The negative pressure test electromagnetic valve A2 and the negative pressure test stop valve Q2 are in an open state during the negative pressure test, and are in a closed state at the rest of time.
Further, the positive pressure test gas circuit with negative pressure test gas circuit sharing filter F, filter F's gas outlet with the gas inlet lug connection of test seal head or through the trachea intercommunication, filter F's air inlet respectively with positive pressure test stop valve Q1 with negative pressure test stop valve Q2 intercommunication, as shown in fig. 3, can prevent like this that foreign matter from getting into and leading to the electric elements of front end, solenoid valve to take place the jamming from the test port (being test seal head's gas inlet) when the negative pressure starts.
The detection system for detecting the assembly quality of the check valve and the oil storage barrel comprises a positive pressure test and a negative pressure test.
As shown in fig. 7, the positive pressure test includes the following steps:
step A1, the control unit controls the positive pressure test electromagnetic valve A1 to open;
step A2, after the first positive pressure running time, the control unit controls the positive pressure test stop valve Q1 to open;
step A3, after the second positive pressure running time, the control unit collects the positive pressure signal of the positive pressure test pressure switch C1 and the flow signal of the positive pressure test flowmeter B1 according to the set sampling time;
step A4, the control unit judges the collected positive pressure signal of the positive pressure test gas path (namely the pressure signal of the positive pressure test pressure switch C1) and the flow signal passing through the one-way valve (namely the flow signal of the positive pressure test flowmeter B1), if the positive pressure signal is always in the set positive pressure range in the sampling time and the flow signal is not less than the preset valve opening threshold value, the control unit judges that the one-way valve can be reliably opened, otherwise, if the positive pressure signal exceeds the set positive pressure range in the sampling time or the flow signal is less than the preset valve opening threshold value in the sampling time, the control unit judges that the one-way valve can not be reliably opened;
step A5, the control unit controls the positive pressure test stop valve Q1 to close;
in step A6, the control unit controls the positive pressure test solenoid valve A1 to close.
As shown in fig. 8, the negative pressure test includes the following steps:
step B1, the control unit controls the negative pressure test electromagnetic valve A2 to open;
step B2, after the first negative pressure operation time, the control unit controls the negative pressure test stop valve Q2 to open;
step B3, after the second negative pressure operation time, the control unit collects the negative pressure signal of the negative pressure test pressure switch C2 and the flow signal of the negative pressure test flowmeter B2 according to the set sampling time;
step B4, the control unit judges the collected negative pressure signal of the negative pressure test air path (namely the pressure signal of the negative pressure test pressure switch C2) and the flow signal passing through the one-way valve (namely the flow signal of the negative pressure test flowmeter B2), if the negative pressure signal is always in the set negative pressure range and the flow signal is not more than the preset valve closing threshold value in the sampling time, the control unit judges that the one-way valve can be reliably closed, otherwise, if the negative pressure signal is out of the set negative pressure range in the sampling time or the flow signal is more than the preset valve closing threshold value in the sampling time, the control unit judges that the one-way valve can not be reliably closed;
step B6, the control unit controls the negative pressure test electromagnetic valve A2 to close;
and step B7, the control unit controls the negative pressure test stop valve Q2 to close.
In this embodiment, the second positive pressure operation time is greater than the first positive pressure operation time, and the second negative pressure operation time is greater than the first negative pressure operation time. Specifically, for example, the positive pressure test cut valve a1 opens 0.5S before opening the positive pressure test cut valve Q1, the positive pressure test cut valve Q1 opens 2S before collecting signals of the positive pressure test flow meter B1 and the positive pressure test pressure switch C1, the negative pressure test cut valve a2 opens 1S before opening the negative pressure test cut valve Q2, and the negative pressure test cut valve Q2 opens 2S before collecting signals of the negative pressure test flow meter B2 and the negative pressure test pressure switch C2.
Third embodiment
The present embodiment is basically the same as the system framework of the second embodiment, except that, as shown in fig. 4, the positive pressure test air path further includes a positive pressure test pressure regulating valve, and the negative pressure test air path further includes a negative pressure test pressure regulating valve.
The positive pressure test pressure regulating valve is connected between the positive pressure test electromagnetic valve A1 and the positive pressure test flowmeter B1 in series, and the positive pressure test pressure switch C1 is connected between the positive pressure test pressure regulating valve and the positive pressure test flowmeter B1 in parallel.
The negative pressure test pressure regulating valve is connected in series between the negative pressure generator G and the negative pressure test flowmeter B2, and the negative pressure test pressure switch C2 is connected in parallel between the negative pressure test pressure regulating valve and the negative pressure test flowmeter B2.
Further, the positive pressure test pressure regulating valve and the negative pressure test pressure regulating valve may be mechanical pressure regulating valves or electronic pressure regulating valves connected to the control unit, and the positive pressure test pressure regulating valve and the negative pressure test pressure regulating valves are used for regulating the pressure of the corresponding test gas circuit to a required range before the test process starts. Generally, when a mechanical pressure regulating valve is adopted, the mechanical pressure regulating valve is manually regulated by a device before operation, and is not regulated in the test process, when an electronic pressure regulating valve is adopted, a required pressure is preset, and when the pressure before operation is not in the required range, the pressure is automatically regulated.
The positive pressure test for detecting the assembly quality of the check valve and the oil storage barrel by adopting the detection system is shown in fig. 9 and comprises the following steps:
step A1', adjusting the positive pressure of the positive pressure test air path by using the positive pressure test pressure regulating valve;
step A2', the control unit controls the positive pressure test electromagnetic valve to open;
step A3', after the first positive pressure running time, the control unit controls the positive pressure test stop valve to open;
step A4', after the second positive pressure running time, the control unit collects the positive pressure signal of the positive pressure test pressure switch and the flow signal of the positive pressure test flowmeter according to the set sampling time;
step A5', the control unit judges the collected positive pressure signal and flow signal, if the positive pressure signal is always in the set positive pressure range and the flow signal is not less than the preset valve opening threshold value in the sampling time, the control unit judges that the one-way valve can be reliably opened, otherwise, the control unit judges that the one-way valve can not be reliably opened;
step A6', the control unit controls the positive pressure test stop valve to close;
step a7', the control unit controls the positive pressure test solenoid valve to close.
The negative pressure test in the detection method, as shown in fig. 10, includes the following steps:
step B1', adjusting the negative pressure of the negative pressure test air path by using the negative pressure test pressure regulating valve;
step B2', the control unit controls the negative pressure test electromagnetic valve to open;
step B3', after the first negative pressure operation time, the control unit controls the negative pressure test stop valve to open;
step B4', after the second negative pressure operation time, the control unit collects the negative pressure signal of the negative pressure test pressure switch and the flow signal of the negative pressure test flowmeter according to the set sampling time;
step B5', the control unit judges the collected negative pressure signal and flow signal, if the negative pressure signal is always in the set negative pressure range and the flow signal is not more than the preset valve closing threshold value in the sampling time, the control unit judges that the one-way valve can be reliably closed, otherwise, the control unit judges that the one-way valve can not be reliably closed;
step B6', the control unit controls the negative pressure test electromagnetic valve to close;
and step B7', the control unit controls the negative pressure test stop valve to be closed.
Likewise, the second positive pressure operation time is greater than the first positive pressure operation time, and the second negative pressure operation time is greater than the first negative pressure operation time. Specifically, for example, the positive pressure test cut valve a1 opens 0.5S before opening the positive pressure test cut valve Q1, the positive pressure test cut valve Q1 opens 2S before collecting signals of the positive pressure test flow meter B1 and the positive pressure test pressure switch C1, the negative pressure test cut valve a2 opens 1S before opening the negative pressure test cut valve Q2, and the negative pressure test cut valve Q2 opens 2S before collecting signals of the negative pressure test flow meter B2 and the negative pressure test pressure switch C2.
In the present invention, the valve closing threshold, the valve opening threshold, the positive pressure range, the negative pressure range, the sampling time, the second positive pressure operation time, the first positive pressure operation time, the second negative pressure operation time, the first negative pressure operation time, etc. may be set according to the sealing requirement and the accuracy requirement of the detection result required by the product, which are well known to those skilled in the art, and therefore, the present invention is not limited thereto.
Meanwhile, the connection between the pneumatic elements of the test system needs to ensure tightness, and the pipeline connection needs to be free from air leakage defects, which also belongs to the common knowledge of the technicians in the field.
The invention detects whether the one-way valve can be reliably opened under the condition of needing to be opened or not through the gas flow state in the positive pressure test gas circuit, and simultaneously detects whether the one-way valve can be reliably closed under the condition of needing to be closed or not through the gas flow state in the negative pressure test gas circuit, thereby flexibly and reliably testing the assembly effect of the one-way valve and the oil storage barrel, ensuring the performance requirement of the fuel pump assembly and being widely applied to the production line of the fuel pump assembly.
The present invention has been described in detail with reference to the specific embodiments, which are merely preferred embodiments of the present invention, and the present invention is not limited to the above embodiments. Equivalent alterations and modifications made by those skilled in the art without departing from the principle of the invention should be considered to be within the technical scope of the invention.
Claims (20)
1. The utility model provides a detecting system of oil storage bucket and check valve assembly quality in fuel pump assembly which characterized in that includes:
the testing sealing head is in a hollow tubular shape, one end of the testing sealing head is in sealing connection with the oil storage barrel, the other end of the testing sealing head is provided with a gas inlet, and the gas inlets are connected with the positive pressure testing gas path and the negative pressure testing gas path;
the positive pressure test gas circuit is used for simulating the opening force applied when the check valve is opened in the working state of the fuel pump assembly and detecting the positive pressure of the positive pressure test gas circuit and the gas flow passing through the check valve when the check valve is opened;
the negative pressure test gas circuit is used for simulating the closing force applied when the one-way valve is closed in the working state of the fuel pump assembly and detecting the negative pressure of the negative pressure test gas circuit and the gas flow passing through the one-way valve when the one-way valve is closed;
and the control unit is used for controlling the states of the positive pressure test air path and the negative pressure test air path, judging the opening degree of the one-way valve according to the gas flow passing through the one-way valve when the one-way valve is opened, and judging the closing degree of the one-way valve according to the gas flow passing through the one-way valve when the one-way valve is closed.
2. The fuel pump assembly storage barrel and check valve assembly quality detection system of claim 1, wherein the positive pressure test gas path and the negative pressure test gas path share a positive pressure gas source.
3. The system for detecting the assembly quality of the oil storage barrel and the check valve in the fuel pump assembly according to claim 2, wherein the positive pressure test gas path comprises a positive pressure test solenoid valve, a positive pressure test stop valve, a positive pressure test pressure switch and a positive pressure test flow meter, the positive pressure test solenoid valve, the positive pressure test flow meter and the positive pressure test stop valve are sequentially connected in series through a gas pipe between a positive pressure gas source and a gas inlet of the test sealing head, the positive pressure test pressure switch is connected in parallel between the positive pressure test solenoid valve and the positive pressure test flow meter, the positive pressure test solenoid valve, the positive pressure test stop valve, the positive pressure test pressure switch and the positive pressure test flow meter are all connected with the control unit.
4. The system for detecting the assembly quality of the oil storage barrel and the check valve in the fuel pump assembly according to claim 2, wherein the negative pressure test air path comprises a negative pressure test electromagnetic valve, a negative pressure test stop valve, a negative pressure test pressure switch, a negative pressure test flowmeter and a negative pressure generator, the negative pressure test electromagnetic valve, the negative pressure generator, the negative pressure test flowmeter and the negative pressure test stop valve are sequentially connected in series between the positive pressure air source and the gas inlet of the test sealing head through an air pipe, the negative pressure test pressure switch is connected in parallel between the negative pressure generator and the negative pressure test flowmeter, and the negative pressure test electromagnetic valve, the negative pressure test stop valve, the negative pressure test pressure switch and the negative pressure test flowmeter are all connected with the control unit.
5. The system of claim 3, wherein the positive pressure test gas path further comprises a positive pressure test pressure regulating valve, the positive pressure test pressure regulating valve is connected in series between the positive pressure test solenoid valve and the positive pressure test flow meter, and the positive pressure test pressure switch is connected in parallel between the positive pressure test pressure regulating valve and the positive pressure test flow meter.
6. The system for detecting the assembling quality of the storage barrel and the check valve in the fuel pump assembly as recited in claim 5, wherein the positive pressure test pressure regulating valve is a mechanical pressure regulating valve or an electronic pressure regulating valve connected with the control unit.
7. The system for detecting the assembling quality of the oil storage barrel and the check valve in the fuel pump assembly as recited in claim 4, wherein the negative pressure test air path further comprises a negative pressure test pressure regulating valve, the negative pressure test pressure regulating valve is connected in series between the negative pressure generator and the negative pressure test flowmeter, and the negative pressure test pressure switch is connected in parallel between the negative pressure test pressure regulating valve and the negative pressure test flowmeter.
8. The system for detecting the assembling quality of the storage barrel and the check valve in the fuel pump assembly as recited in claim 7, wherein the negative pressure test pressure regulating valve is a mechanical pressure regulating valve or an electronic pressure regulating valve connected to the control unit.
9. The system for detecting the assembling quality of the oil storage barrel and the check valve in the fuel pump assembly as claimed in claim 3 or 4, wherein the positive pressure test gas path and the negative pressure test gas path share a filter, the gas outlet of the filter is directly connected with the gas inlet of the test sealing head or communicated with the gas inlet of the test sealing head through a gas pipe, and the gas inlet of the filter is respectively communicated with the positive pressure test stop valve and the negative pressure test stop valve.
10. A method of testing using the system of claim 1 for testing the quality of the assembly of the reservoir and the check valve in a fuel pump assembly, comprising the steps of:
step S1, the assembly quality of the oil storage barrel and the one-way valve is subjected to positive pressure test, wherein:
step S11, the control unit opens the positive pressure test gas path;
step S12, detecting the positive pressure of the positive pressure test gas path and the gas flow passing through the one-way valve in the set sampling time, and transmitting the detection result to the control unit;
step S13, the control unit judges the collected positive pressure of the positive pressure test gas path and the gas flow passing through the one-way valve, if the positive pressure is always in the set positive pressure range in the sampling time and the gas flow passing through the one-way valve is not less than the preset valve opening threshold value, the control unit judges that the one-way valve can be reliably opened, otherwise, the control unit judges that the one-way valve can not be reliably opened;
step S14, the control unit closes the positive pressure test gas circuit;
step S2, the assembly quality of the oil storage barrel and the one-way valve is tested under negative pressure, wherein:
step S21, the control unit opens the negative pressure test air path;
step S22, detecting the negative pressure of the negative pressure test gas circuit and the gas flow passing through the one-way valve in the set sampling time, and transmitting the detection result to the control unit;
step S23, the control unit judges the collected negative pressure of the negative pressure test gas path and the gas flow passing through the one-way valve, if the negative pressure is always in the set negative pressure range in the sampling time and the gas flow passing through the one-way valve is not more than the preset valve closing threshold value, the control unit judges that the one-way valve can be reliably closed, otherwise, the control unit judges that the one-way valve can not be reliably closed;
and step S24, the control unit closes the negative pressure test air passage.
11. The method of claim 10, wherein in step S1, the positive pressure test circuit is opened and kept running for a set time before the positive pressure test circuit is opened and the positive pressure and the flow of gas through the check valve are detected.
12. The method of claim 10, wherein in step S2, the negative pressure test circuit is opened and kept running for a set time before the negative pressure test circuit is opened and the negative pressure and the flow rate of the gas passing through the check valve are detected.
13. A testing method using the system for testing the quality of the assembly of the reservoir and the check valve in the fuel pump assembly of claim 3, wherein the positive pressure test in the testing method comprises the following steps:
step A1, the control unit controls the positive pressure test electromagnetic valve to open;
step A2, after the first positive pressure running time, the control unit controls the positive pressure test stop valve to open;
step A3, after the second positive pressure running time, the control unit collects the positive pressure signal of the positive pressure test pressure switch and the flow signal of the positive pressure test flowmeter according to the set sampling time;
step A4, judging the collected positive pressure signal and flow signal by the control unit, if the positive pressure signal is always in the set positive pressure range and the flow signal is not less than the preset valve opening threshold value in the sampling time, judging that the one-way valve can be reliably opened by the control unit, otherwise judging that the one-way valve cannot be reliably opened by the control unit;
step A5, the control unit controls the positive pressure test stop valve to close;
step A6, the control unit controls the positive pressure test solenoid valve to close.
14. The method of detecting a quality of a fuel reservoir and check valve assembly of a fuel pump assembly of claim 13, wherein the second positive pressure runtime is greater than the first positive pressure runtime.
15. A detection method using the detection system for the assembly quality of the storage tank and the check valve in the fuel pump assembly of claim 4, characterized in that the negative pressure test in the detection method comprises the following steps:
step B1, the control unit controls the negative pressure test electromagnetic valve to open;
step B2, after the first negative pressure operation time, the control unit controls the negative pressure test stop valve to open;
step B3, after the second negative pressure operation time, the control unit collects the negative pressure signal of the negative pressure test pressure switch and the flow signal of the negative pressure test flowmeter according to the set sampling time;
step B4, the control unit judges the collected negative pressure signal and flow signal, if the negative pressure signal is always in the set negative pressure range and the flow signal is not more than the preset valve closing threshold value in the sampling time, the control unit judges that the one-way valve can be reliably closed, otherwise, the control unit judges that the one-way valve can not be reliably closed;
step B5, the control unit controls the negative pressure test electromagnetic valve to close;
and step B6, the control unit controls the negative pressure test stop valve to close.
16. The method of detecting a quality of a fuel reservoir and check valve assembly of a fuel pump assembly of claim 15, wherein the second negative pressure run time is greater than the first negative pressure run time.
17. A testing method using the system for testing the quality of the assembly of the reservoir and the check valve in the fuel pump assembly of claim 5, wherein the positive pressure test in the testing method comprises the following steps:
step A1', adjusting the positive pressure of the positive pressure test air path by using the positive pressure test pressure regulating valve;
step A2', the control unit controls the positive pressure test electromagnetic valve to open;
step A3', after the first positive pressure running time, the control unit controls the positive pressure test stop valve to open;
step A4', after the second positive pressure running time, the control unit collects the positive pressure signal of the positive pressure test pressure switch and the flow signal of the positive pressure test flowmeter according to the set sampling time;
step A5', the control unit judges the collected positive pressure signal and flow signal, if the positive pressure signal is always in the set positive pressure range and the flow signal is not less than the preset valve opening threshold value in the sampling time, the control unit judges that the one-way valve can be reliably opened, otherwise, the control unit judges that the one-way valve can not be reliably opened;
step A6', the control unit controls the positive pressure test stop valve to close;
step a7', the control unit controls the positive pressure test solenoid valve to close.
18. The method of detecting a quality of a fuel reservoir and check valve assembly of a fuel pump assembly of claim 17, wherein the second positive pressure runtime is greater than the first positive pressure runtime.
19. A testing method using the system for testing the quality of the assembly of the reservoir and the check valve in the fuel pump assembly of claim 7, wherein the negative pressure test in the testing method comprises the following steps:
step B1', adjusting the negative pressure of the negative pressure test air path by using the negative pressure test pressure regulating valve;
step B2', the control unit controls the negative pressure test electromagnetic valve to open;
step B3', after the first negative pressure operation time, the control unit controls the negative pressure test stop valve to open;
step B4', after the second negative pressure operation time, the control unit collects the negative pressure signal of the negative pressure test pressure switch and the flow signal of the negative pressure test flowmeter according to the set sampling time;
step B5', the control unit judges the collected negative pressure signal and flow signal, if the negative pressure signal is always in the set negative pressure range and the flow signal is not more than the preset valve closing threshold value in the sampling time, the control unit judges that the one-way valve can be reliably closed, otherwise, the control unit judges that the one-way valve can not be reliably closed;
step B6', the control unit controls the negative pressure test electromagnetic valve to close;
and step B7', the control unit controls the negative pressure test stop valve to be closed.
20. The method of detecting a quality of a fuel reservoir and check valve assembly of a fuel pump assembly of claim 19, wherein the second negative pressure run time is greater than the first negative pressure run time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011577286.1A CN112729799A (en) | 2020-12-28 | 2020-12-28 | System and method for detecting assembly quality of oil storage barrel and one-way valve in fuel pump assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011577286.1A CN112729799A (en) | 2020-12-28 | 2020-12-28 | System and method for detecting assembly quality of oil storage barrel and one-way valve in fuel pump assembly |
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| JPH06235680A (en) * | 1993-02-10 | 1994-08-23 | Kiyohara Masako | Method and equipment for testing check valve |
| CN105334035A (en) * | 2015-11-02 | 2016-02-17 | 绵阳富临精工机械股份有限公司 | One-way valve performance test system and test method |
| CN207456766U (en) * | 2017-12-08 | 2018-06-05 | 南昌工控电装有限公司 | A kind of check valve testboard |
| CN209910924U (en) * | 2019-06-21 | 2020-01-07 | 上海达盾自动化科技有限公司 | Check valve gas testing system |
| CN111912615A (en) * | 2020-08-28 | 2020-11-10 | 格力电器（武汉）有限公司 | Check valve testing device |
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2020
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06235680A (en) * | 1993-02-10 | 1994-08-23 | Kiyohara Masako | Method and equipment for testing check valve |
| CN105334035A (en) * | 2015-11-02 | 2016-02-17 | 绵阳富临精工机械股份有限公司 | One-way valve performance test system and test method |
| CN207456766U (en) * | 2017-12-08 | 2018-06-05 | 南昌工控电装有限公司 | A kind of check valve testboard |
| CN209910924U (en) * | 2019-06-21 | 2020-01-07 | 上海达盾自动化科技有限公司 | Check valve gas testing system |
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