CN115060487A - Reed valve detection device and system - Google Patents

Abstract

A reed valve detection device and a system thereof comprise an airflow supply mechanism and an airflow impact control mechanism, wherein an air buffer cavity is arranged between an air inlet end base and an air outlet end base of the airflow impact control mechanism, and a detection interface which is communicated with the air buffer cavity and is used for connecting a reed valve is arranged on the air outlet end base; the air chamber is communicated to each electromagnetic valve mounting hole through an air channel distributed in the air inlet end base and communicated with the air buffer cavity through an electromagnetic valve. The on-off of the impact air flow is controlled by a plurality of electromagnetic valves, the high-frequency switch control of large-flow gas can be realized by utilizing a plurality of small-flow high-frequency electromagnetic valves, the problems of low switch response speed, insufficient switch frequency and overheating under the conditions of high flow and high current of the large-flow electromagnetic valves are solved, and the high-frequency air flow impact of the real engine working process is realized.

Description

Reed valve detection device and system

Technical Field

The invention relates to a detection technology of an engine air intake system element, in particular to a reed valve detection device and a system.

Background

The reed valve is an important part in an air inlet system of a two-stroke engine, directly controls the air inlet quantity of a crankcase, and indirectly influences the power characteristics, fuel economy and emission characteristics of the engine. During the operation of the engine, the crankshaft rotates for one circle, the reed valve needs to go through two stages of opening and closing, and the opening and closing frequency of the reed valve is increased continuously along with the increase of the rotating speed. This frequent switching process has directly influenced the life-span of reed valve, and especially its vibration frequency is close the natural frequency of reed valve under a certain rotational speed, probably takes place to resonate, and resonant reed can beat the limiting plate with great amplitude and impact force, and the reed has the risk of smashing. Once damaged, the reed valve inevitably causes the power output of the engine to be damaged, and even causes the engine to stop working. Therefore, the effectiveness detection of the reed valve assembly is critical to the control of product quality.

The reliability of each working condition point and the air inflow detection means of the reed valve in the working process of the engine are still relatively incomplete, and at present, two methods are adopted, wherein one method is to directly act normal force on a reed so as to measure the deformation of the reed. The detection process directly applies mechanical force to the reed, and the actual working process of the engine is fluid force applied by air flow to the reed valve, so that the mode is difficult to simulate the actual force process of gas flow, and high-frequency switching is difficult to realize in the detection process.

Secondly, the reed valve is impacted by airflow with a certain frequency by opening and closing the air circulation valve. In order to truly simulate the working process of a two-stroke engine, the gas flow for applying impact to the reed valve needs to be ensured. Due to the technical limitation of the air circulation valve, the air circulation valve meeting the requirement of the reed valve for detecting the air flow flux has overlong response time, is difficult to realize high-frequency air flow conversion, and generates heat seriously after long-time work due to overlarge control current. Moreover, the air flow valve with large flow capacity is difficult to realize accurate control of air flow, is difficult to realize conversion of angle and time control modes, and does not really simulate air flow pressure and temperature to correct opening of the electromagnetic valve in the working process.

Disclosure of Invention

The invention aims to overcome the defect that a reed valve detection device is difficult to realize high-frequency airflow transformation by airflow impact, and provides a reed valve detection device and a system.

The technical scheme adopted by the invention for solving the technical problems is as follows: a reed valve detection device comprises an airflow supply mechanism for providing pressure airflow and an airflow impact control mechanism for connecting the airflow supply mechanism and a reed valve to be detected, wherein the airflow impact control mechanism comprises an air inlet end base and an air outlet end base which are butted with each other, an air buffer cavity is arranged between the air inlet end base and the air outlet end base, and a detection interface which is communicated with the air buffer cavity and is used for connecting the reed valve is arranged on the air outlet end base; the air inlet end base is provided with an air chamber used for being connected with an air flow supply mechanism, a plurality of electromagnetic valve mounting holes communicated to the air buffer cavity are distributed around the air chamber, and the air chamber is communicated to the electromagnetic valve mounting holes through air channels distributed in the air inlet end base and is communicated with the air buffer cavity through electromagnetic valves arranged in the electromagnetic valve mounting holes.

The electromagnetic valve mounting holes are uniformly distributed on the periphery of the air chamber, and the center of the air chamber corresponds to the center of the air buffer cavity.

The electromagnetic valve mounting hole is internally provided with a transition sleeve, the shape of an inner hole of the transition sleeve is matched with that of the electromagnetic valve, and the transition sleeve is provided with a vent hole corresponding to the gas channel.

The air inlet end base is provided with an air chamber and one side of the electromagnetic valve mounting hole, a pressing plate is connected to the side of the air inlet end base, the center of the pressing plate is provided with a hole corresponding to the air chamber, and a notch surrounding and fixing the electromagnetic valve is formed in the circumference of the pressing plate.

And a concave cavity is arranged on one surface of the air outlet end base, which is used for being butted with the air inlet end base, and the circumference of the concave cavity is butted with the air inlet end base through a sealing ring and is enclosed into the air buffer cavity.

The air inlet end base is provided with a groove which is in butt joint with the concave cavity of the air outlet end base, and the groove is located in a circular area defined by the electromagnetic valve mounting holes.

The air flow supply mechanism comprises a first-stage air storage tank and a second-stage air storage tank, the first-stage air storage tank is connected to the second-stage air storage tank through a pressure reducing valve, and the second-stage air storage tank is connected to an air chamber of the air inlet end base through an air supply pipeline.

The reed valve detection device is also provided with a control unit, and the control unit receives air pressure and flow signals and controls the switching frequency of the electromagnetic valve.

The air supply pipeline of the airflow impact control mechanism for connecting the airflow supply mechanism is connected with a temperature pressure transmitter for detecting the temperature and pressure of air in the pipeline and a flow transmitter for detecting the air flow of the pipeline, and the temperature pressure transmitter and the flow transmitter are connected with the control unit.

The invention also provides a reed valve detection system which comprises the reed valve detection device, wherein the reed valve detection device is fixed on a test bed through a support, a display screen for displaying monitoring parameters and an operation module for controlling the operation mode of the electromagnetic valve are arranged on the test bed, and the operation module is connected with a control unit for controlling the opening and closing of the electromagnetic valve in the reed valve detection device.

The invention has the beneficial effects that: the airflow impact control mechanism divides the supplied pressure airflow to a plurality of circumferential electromagnetic valves and then converges the pressure airflow into impact airflow again in the air buffer cavity for reed valve detection. The on-off of the impact air flow is controlled by a plurality of electromagnetic valves, the high-frequency switch control of large-flow gas can be realized by utilizing a plurality of small-flow high-frequency electromagnetic valves, the problems of low switch response speed, insufficient switch frequency and overheating under the conditions of high flow and high current of the large-flow electromagnetic valves are solved, and the high-frequency air flow impact of the real engine working process is realized.

Furthermore, a pressure reducing valve is arranged between the primary air storage tank and the secondary air storage tank to adjust the compressed air to the required pressure, so that the compressed air in the real working process of the engine can be simulated. The temperature and pressure are fed back to the control unit by the temperature pressure transmitter in real time in the simulation process, the control unit can correct the opening time of the electromagnetic valve in real time according to the temperature and pressure values fed back, and the air flow passing through the reed valve is further accurately controlled. The whole test system can be designed into two control modes based on angle and time switching, and can truly simulate the opening air inlet time and the acceleration endurance simulation test of the reed valve of the engine.

Drawings

FIG. 1 is a schematic view of the structure of the detecting device of the present invention.

FIG. 2 is a schematic view of the inlet side of the airflow impingement control mechanism of the present invention.

FIG. 3 is a schematic view of the air outlet side of the airflow impingement control mechanism of the present invention.

Fig. 4 is a schematic cross-sectional view of an airflow impingement control mechanism of the present invention.

Fig. 5 is a schematic view of the structure of the air inlet end base of the airflow impact control mechanism.

Fig. 6 is a schematic view of the rear side of the inlet end base shown in fig. 5.

Fig. 7 is a cross-sectional view of the inlet end base of fig. 5.

Fig. 8 is a schematic view of the structure of the platen.

Fig. 9 is a cross-sectional schematic view of a transition sleeve.

Fig. 10 is a schematic view of the structure of the air outlet end base of the air flow impact control mechanism.

Fig. 11 is a schematic view of a back side structure of the outlet base shown in fig. 10.

FIG. 12 is a cross-sectional view of the base at the gas outlet end.

Fig. 13 is a schematic structural view of the airflow supply mechanism.

FIG. 14 is a schematic view of the arrangement of the detecting unit of the present invention on the test bed.

FIG. 15 is a schematic structural view of the test stand.

FIG. 16 is a schematic view of a bracket structure for fixing the detecting unit.

FIG. 17 is a schematic diagram of a detection system of the present invention.

The labels in the figure are: 1. a test bed, 101, a temperature and pressure display screen, 102, a gas flow display screen, 103, a speed control touch screen, 104, a time/angle control switch key, 105, a support cabinet, 106, a horizontal supporting plate, 107, a threaded hole A, 2, a gas flow supply mechanism, 201, a primary gas storage tank, 202, a secondary gas storage tank, 203, a pressure reducing valve, 204, a gas supply pipeline, 205, a gas inlet interface, 206, a valve, 207, a gas outlet, 3, a gas impact switching mechanism, 4, a gas inlet end base, 401, a gas chamber, 402, a solenoid valve mounting hole, 403, a gas channel, 404, a groove, 405, a threaded hole D, 406, a threaded hole E, 5, a gas outlet end base, 501, a detection interface, 502, a cavity, 503, a sealing groove, 504, a threaded hole F, 505, a threaded hole G, 6, a gas buffer cavity, 7, a solenoid valve, 8, a transition sleeve, 801, a vent hole, 802 and a small seat hole, 803. the device comprises a large seat hole, 9, a pressing plate, 901, an opening, 902, a notch, 903, a through hole A, 10, a reed valve, 11, a sealing ring, 12, a temperature pressure transmitter, 13, a flow transmitter, 14, a support, 141, a threaded hole B, 142, a large through hole, 143, a threaded hole C, 15, a three-way joint, 16, a pressure gauge, 17 and an air pump.

Detailed Description

The technical scheme of the invention is clearly and completely described below with reference to the accompanying drawings and the detailed description. The specific contents listed in the following examples are not limited to the technical features necessary for solving the technical problems to be solved by the technical solutions described in the claims. Meanwhile, the list is that the embodiment is only a part of the present invention, and not all embodiments.

As shown in fig. 1, the reed valve detecting device of the present invention includes an air flow supply mechanism 2 and an air flow surge control mechanism 3. The air flow supply mechanism 2 is used for supplying pressure air flow to the air flow impact control mechanism 3. The airflow impact control mechanism 3 receives the pressure airflow provided by the airflow supply mechanism 2 and controls the high-frequency on-off of the airflow so as to form high-frequency airflow impact on the connected reed valve 10 to be detected, so as to simulate the state of the connected reed valve under the operating condition of the engine.

As shown in fig. 2, 3 and 4, the airflow impact control mechanism 3 comprises an air inlet end base 4 connected with the airflow supply mechanism 2 and an air outlet end base 5 connected with the reed valve 10 to be detected. The air inlet end base 4 is butted with the air outlet end base 5, and an air buffer cavity 6 is formed between the air inlet end base and the air outlet end base.

As shown in fig. 5, 6 and 7, the air inlet end base 4 has an air chamber 401 at the center, and a plurality of solenoid valve mounting holes 402 are distributed around the air chamber 401. The air chamber 401 is communicated to each solenoid valve mounting hole 402 through air passages 403 distributed in the air inlet end base 4. The solenoid valve mounting hole 402 communicates with the gas buffer chamber 6, and a solenoid valve 7 for controlling the passage of gas between the gas passage 403 and the gas buffer chamber 6 is provided therein. The gas chamber 401 is connected to the gas supply mechanism 2, and the supplied pressure gas flow is distributed from the gas chamber 401 to the respective solenoid valve mounting holes 402 through gas passages 403 circumferentially distributed therein, and the solenoid valves 7 are communicated to the gas buffer chamber 6. The electromagnetic valve 7 is a gas electromagnetic valve which can be switched on and off at high frequency, and the switching frequency of the gas electromagnetic valve is synchronously controlled by the control unit.

As shown in fig. 4, the solenoid valve 7 is fitted in the solenoid valve mounting hole 402 using the transition sleeve 8. The transition sleeve 8 has a structure as shown in fig. 9, and has an inner hole shape matching the solenoid valve 7, and is divided into two sections, i.e., a small seat hole 802 and a large seat hole 803, which have different bore diameters in the axial direction. The transition sleeve 8 is provided with a vent hole 801 for communicating with the gas passage 403. The transition sleeve 8 is arranged in the solenoid valve mounting hole 402 in an interference fit manner, and the ventilation hole 801 is ensured to be aligned with the gas channel 403 as much as possible. The electromagnetic valve 7 is arranged in the transition sleeve 8, a large O-shaped ring of the electromagnetic valve 7 is connected with a large seat hole 803 in the transition sleeve 8, and a small O-shaped ring of the electromagnetic valve 7 is connected with a small seat hole 802 in the transition sleeve 8, so that the sealing performance of the air duct is ensured.

In the embodiment shown in fig. 2 to 7, twelve solenoid valve mounting holes 402 are uniformly distributed along the periphery of the air chamber 401, and twelve solenoid valves 7 are respectively mounted in the corresponding solenoid valve mounting holes 402. The circle formed by the twelve electromagnetic valves 7 is concentric with the air chamber 401, and the path lengths of the air channels 403 for distributing air to the periphery are equal, so that the consistency of the pressure of the distributed air is ensured.

As shown in fig. 2 and 8, a pressure plate 9 is attached to the side of the inlet end base 4 where the air chamber 401 and the solenoid valve mounting hole 402 are provided. The pressing plate 9 has an opening 901 in the center and a recess 902 on the circumference. After the transition sleeve 8 and the solenoid valve 7 are installed in the solenoid valve installation hole 402, the pressing plate 9 is installed, an opening 901 in the center of the pressing plate 9 corresponds to the air chamber 401, and a notch 902 in the circumference of the pressing plate 9 is in clearance with the solenoid valve 7 and is in half surrounding and presses on a flange surface in the circumference of the solenoid valve 7. The pressing plate 9 is tightly pressed on the air inlet end base 4 through the through hole A903 of the pressing plate and the threaded hole D405 of the air inlet end base 4 by using bolts, so that the purpose of pressing the electromagnetic valve 7 is achieved.

As shown in fig. 4, a detection interface 501 is arranged on the air outlet end base 5, and the detection interface 501 is used for fixedly mounting the reed valve 10 to be detected, and is internally communicated with the gas buffer chamber 6. The gas flows delivered by the plurality of solenoid valves 7 are converged in the gas buffer chamber 6 to form a pressure gas flow which can flow out of the impact reed valve 10 through the detection interface 501.

As shown in fig. 10, 11 and 12, a cavity 502 is formed on one side of the outlet end base 5, a sealing groove 503 is formed on the circumference of the cavity 502, and the sealing ring 11 is arranged in the sealing groove 503. After the surface of the air outlet end base 5 provided with the concave cavity 502 is butted with the air inlet end base 4, the concave cavity 502 forms the air buffer cavity 6. Bolts penetrate through the threaded holes F504 of the air outlet end base 5 and the threaded holes E406 of the air inlet end base 4 shown in FIG. 6 to connect and fix the air inlet end base 4 and the air outlet end base 5 and compress the sealing ring 11 to ensure the sealing performance of the end faces of the air inlet end base and the air outlet end base.

The detection port 501 of the outlet-side base 5 is disposed in the center of the cavity 502, which is a rectangular air duct in the embodiment shown in fig. 10 and 11. The reed valve 10 is arranged at the detection interface 501 from the outer side, the reed valve 10 is fixed on the air outlet end base 5 through bolts, through holes in connecting seats at two sides of the reed valve 10 and threaded holes G505 in the air outlet end base 5, and meanwhile, sealant is coated to ensure the connection tightness.

As shown in fig. 4 and 6, a groove 404 is formed in a surface of the inlet end base 4, which is abutted to the outlet end base 5, and the groove 404 is located in a circular area surrounded by the plurality of solenoid valve mounting holes 402 and forms the gas buffer chamber 6 together with the cavity 502 of the outlet end base 5. The arrangement of the groove 404 increases the buffer space in front of the reed valve inlet end, and avoids the airflow throttling effect caused by the cross section area of the air passage. The concave groove 404 is recessed inward at the outlet of the gas buffer chamber 6 relative to the solenoid valve mounting holes 402, so that the airflows rushed out by the solenoid valve mounting holes 402 are mixed in a swirling manner at the recessed position, and a single airflow is prevented from directly impacting the detection interface 501.

As shown in fig. 13, the air flow supply means 2 includes a primary air tank 201, a secondary air tank 202 and related piping. The primary air storage tank 201 is connected to an air inlet port 205 of the pipeline and is connected to the secondary air storage tank 202 through a pressure reducing valve 203. The gas reduced to the target pressure is temporarily stored in the secondary gas tank 202, and the secondary gas tank 202 is connected to the gas flow supply means 3 through the gas supply line 204 to supply the pressure gas flow to the gas flow impact control means 3. Wherein, the air outlet 207 of the air supply pipeline 204 is connected with the inlet of the air chamber 401 of the air inlet end base 4 in an interference fit manner. The gas in the primary gas tank 201 can be supplemented by a gas supply source such as a gas pump.

The air supply line 204 is connected to a temperature pressure transmitter 12 and a flow transmitter 13, the temperature pressure transmitter 12 is used for detecting the temperature and the pressure of the output air of the secondary air storage tank 202, and the flow transmitter 13 is used for detecting the flow of the air supplied to the airflow impact control mechanism 3. The temperature pressure transmitter 12 and the flow transmitter 13 are both connected to a control unit, which controls the supply of air flow and the opening and closing of the solenoid valve according to the detected parameters and the set program.

As shown in fig. 14, the reed valve detecting device system of the present invention includes a test stand 1, an air flow supply mechanism 2 and an air flow impact control mechanism 3, and is fixed on the test stand 1 by a bracket 14. The support 14 is in the form of a plate having an L-shaped vertical cross-section as shown in fig. 16, and has a large through-hole 142 in its plate surface through which the air supply duct 204 of the air supply mechanism 2 can pass. And a threaded hole B141 is formed in the side wall of the plate surface at the position of the large through hole 142 and used for locking and fixing the air supply pipeline 204. The bent part at the lower end of the bracket 14 is provided with a threaded hole C143 which is connected to the threaded hole A107 of the horizontal supporting plate 106 of the test bed 1 through a bolt so as to fix the bracket 14 on the test bed 1. The test bed 1 is provided with a display screen for displaying monitoring parameters, such as a temperature and pressure display screen 101 and a gas flow display screen 102, and an operation module for controlling the operation mode of the electromagnetic valve 7, such as a speed control touch screen 103 and a time/angle control switch key 104. The operation module is connected with the control unit, and the control unit controls the working mode of the corresponding part according to the operation instruction.

The working principle of the detection device of the present invention is shown in fig. 17, in one embodiment, the working process is as follows, an industrial air pump delivers air with a certain pressure to a primary air storage tank, a time/angle control switch key 104 is adjusted to an angle switch key, a control unit can adjust to an angle control mode according to a signal given by the switch key, a speed control button on a speed control touch screen 103 is adjusted to set the speed, the control unit can find a pressure value of an engine air inlet system at a corresponding simulation rotating speed according to a MAP chart stored by the control unit, then gives an output signal to a pressure reducing valve 203, the pressure reducing valve adjusts the air flow pressure to a required target value, delivers the air flow pressure to a secondary air storage tank 202 for energy storage, and opens a valve 206 after the air is inflated for a period of time; the control unit collects signals of speed and angle switching keys, corresponding angle and speed conversion is carried out, further an advance angle and a pulse width signal of the opening of a reed valve of the engine are simulated, meanwhile, an instruction is sent to twelve high-frequency electromagnetic valves 7, the electromagnetic valves 7 are controlled by the instruction to be opened and closed at high frequency, when a single electromagnetic valve 7 is opened, airflow enters a front buffer space at the inlet end of the reed valve formed by the concave cavity 502 and the groove 404 through the air channel 403 and the vent hole 801, the total flow of the twelve electromagnetic valves is converged together to impact the reed of the reed valve, and further the opening and the closing of the reed valve at the corresponding engine rotating speed are controlled. The temperature and pressure transmitter 12 transmits the collected pressure value and temperature value of the air flow to the control unit in the whole process, the control unit corrects the start advance time and the pulse width according to the corresponding values, the working state of the engine can be simulated really, and the flow transmitter 13 transmits the collected air flow to the air flow display screen 102 to display the flow value under the working condition in real time. Because the air flow value required by the simulated engine is large, twelve channels are adopted, and the problem that a single air flow valve is overheated and burnt down under the working conditions of high flow and high current is avoided. The time/angle control switch key 104 is adjusted to the time switch key, conversion is not needed, the opening advance time and the pulse width under the corresponding rotating speed are directly searched, and then the reed is opened and closed as the operation is carried out.

Under a certain specific working condition, the opening and the flow of the reed valve are basically determined by the pressure difference of gas before and after the reed valve, the flow of different pressure differences is an important evaluation index of the reed valve, the flow of different pressure differences can reflect the air inflow of an air inlet system into an engine, the dynamic performance of the engine is directly influenced, the reed valve needs to be opened and closed at high frequency along with the increase of the rotating speed, the high frequency movement can enable the reed to be consistent with the natural frequency under a certain state, resonance is caused, the reed is broken and damaged due to the resonance, and the change of the air inlet flow is seriously influenced. The detection system provided by the scheme has the advantages that the pressure reducing valve is additionally arranged between the first-stage air storage tank and the second-stage air storage tank, compressed air with required pressure is adjusted, compressed air in the real working process of the engine is simulated, twelve high-frequency electromagnetic valve signals are simulated and driven according to the on-off time of the reed valve in each cycle in the working process of the engine, the reed valve can be driven to be opened within corresponding time, and the high-frequency electromagnetic valve can ensure the high-frequency opening and closing of the reed valve according to the on-off of the air flow. In the simulation process, the temperature and pressure transmitter feeds the temperature and the pressure back to the control unit in real time, the control unit can correct the opening time of the electromagnetic valve in real time according to the temperature and the pressure value fed back, the air flow passing through the reed valve is further accurately controlled, and the twelve high-frequency electromagnetic valves avoid the overheating problem of a single air flow valve under the conditions of high flow and high current; and the whole test system is designed into two control modes based on angle and time switching, and can truly simulate the opening air intake time and the acceleration endurance simulation test of the reed valve of the engine.

The above description of the specific embodiments is only for the purpose of helping understanding the technical idea of the present invention and the core idea thereof, and although the technical solution is described and illustrated herein using the specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made therein by those skilled in the art without departing from the technical concept of the present invention. Such modifications and substitutions are intended to be included within the scope of the present invention.

Claims (10)

1. The reed valve detection device is characterized in that: the device comprises an airflow supply mechanism (2) for providing pressure airflow and an airflow impact control mechanism (3) for connecting the airflow supply mechanism (2) and a reed valve (10) to be detected, wherein the airflow impact control mechanism (3) comprises an air inlet end base (4) and an air outlet end base (5) which are butted with each other, an air buffer cavity (6) is arranged between the air inlet end base (4) and the air outlet end base (5), and a detection interface (501) which is communicated with the air buffer cavity (6) and is used for connecting the reed valve (10) is arranged on the air outlet end base (5); the air inlet end base (4) is provided with an air chamber (401) used for being connected with an air flow supply mechanism (2), a plurality of electromagnetic valve mounting holes (402) communicated to the air buffer cavity (6) are distributed around the air chamber (401), the air chamber (401) is communicated to the electromagnetic valve mounting holes (402) through air channels (403) distributed in the air inlet end base (4) and communicated with the air buffer cavity (6) through electromagnetic valves (7) arranged in the electromagnetic valve mounting holes (402).

2. A reed valve detector as in claim 1, wherein: the electromagnetic valve mounting holes (402) are uniformly distributed on the periphery of the air chamber (401), and the center of the air chamber (401) corresponds to the center of the gas buffer cavity (6).

3. A reed valve detecting device as in claim 1, wherein: the electromagnetic valve is characterized in that a transition sleeve (8) is arranged in the electromagnetic valve mounting hole (402), the shape of an inner hole of the transition sleeve (8) is matched with that of the electromagnetic valve (7), and a vent hole (801) corresponding to the gas channel (403) is formed in the transition sleeve (8).

4. A reed valve detector as in claim 1, wherein: one side of the air inlet end base (4) provided with the air chamber (401) and the electromagnetic valve mounting hole (402) is connected with a pressing plate (9), the center of the pressing plate (9) is provided with a hole (901) corresponding to the air chamber (401), and the circumference of the pressing plate (9) is provided with a notch (902) which surrounds and fixes the electromagnetic valve (7).

5. A reed valve detector as in claim 1, wherein: and a concave cavity (502) is arranged on one surface of the air outlet end base (5) for butting with the air inlet end base (4), and the circumference of the concave cavity (502) is butted with the air inlet end base (4) through a sealing ring (11) and is enclosed into the air buffer cavity (6).

6. The reed valve detecting device as claimed in claim 5, wherein: the air inlet end base (4) is provided with a groove (404) which is in butt joint with the concave cavity (502) of the air outlet end base (5), and the groove (404) is located in a circular area surrounded by the electromagnetic valve mounting holes (402).

7. A reed valve detecting device as in claim 1, wherein: the air flow supply mechanism (2) comprises a first-stage air storage tank (201) and a second-stage air storage tank (202), the first-stage air storage tank (201) is connected to the second-stage air storage tank (202) through a pressure reducing valve (203), and the second-stage air storage tank (202) is connected to an air chamber (401) of the air inlet end base (4) through an air supply pipeline (204).

8. A reed valve detector as in claim 1, wherein: the air pressure and flow control device is also provided with a control unit, and the control unit receives air pressure and flow signals and controls the switching frequency of the electromagnetic valve (7).

9. A reed valve detector as in claim 8, wherein: the gas flow impact control mechanism (3) is used for connecting a gas supply pipeline (204) of the gas flow supply mechanism (2) and is connected with a temperature pressure transmitter (12) used for detecting the temperature and the pressure of gas in the pipeline and a flow transmitter (13) used for detecting the gas flow of the pipeline, and the temperature pressure transmitter (12) and the flow transmitter (13) are connected with the control unit.

10. A reed valve detection system, characterized by: the reed valve detection device comprises the reed valve detection device as claimed in any one of claims 1-9, the reed valve detection device is fixed on the test bed (1) through a support (14), a display screen for displaying monitoring parameters and an operation module for controlling the operation mode of the electromagnetic valve (7) are arranged on the test bed (1), and the operation module is connected with a control unit for controlling the electromagnetic valve (7) to be switched on and off in the reed valve detection device.

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