CN110118636A - The airtight testboard of airbed electric air pump - Google Patents

Abstract

The present invention relates to electric air pump airtightness test table technical fields, and a kind of airtight testboard of airbed electric air pump, including board are disclosed, board is made of pipeline, rack, electrical software and frock clamp, frock clamp is mounted at the top of board, and pipeline and electrical software are arranged inside board.The present invention passes through setting test chamber, Pneumatic valve three, Pneumatic valve two, Pneumatic valve one, pressure difference transmitter, mark chamber, shut-off valve, pressure gauge, pressure regulator valve, safety valve, solenoid valve, gas source filters pressure regulator valve one and gas source filters pressure regulator valve two, pressure regulator valve one is filtered using gas source, gas source filters pressure regulator valve two, the presence of pressure difference transmitter and pressure regulator valve, the variation of pressure is detected in time, pressure regulation is carried out by pressure regulator valve, homologous pressure comparison is used using pressure difference transmitter, reach convenient and reliable operation, not by supply pressure fluctation, atmospheric pressure change, temperature fluctuation, pipe volume such as is slightly variable at the purpose of measurement error caused by factors.

Description

Air Bed Electric Air Pump Airtight Test Bench

technical field

The invention relates to the technical field of an electric air pump air tightness testing platform, in particular to an air bed electric air pump air tight testing platform.

Background technique

The usual air pump air tightness tester is limited to simple pressure detection, the principle is simple, and it cannot compare and eliminate the error caused by environmental factors. There are too many factors affected in the detection process, such as temperature, altitude, slight changes in the volume of the pipeline system, and pressure fluctuations caused by the operating valve itself. These factors will cause great errors in the results. According to the ideal gas state equation: PV=nRT, the change of volume and temperature are the two key factors that cause pressure fluctuations. If these two factors cannot be eliminated, the resulting error will have a great impact on the accuracy of the test results. .

As shown in Figure 4, the basic principle diagram of the airtight test of the existing air pump, the stability of the air pressure during operation depends on the temperature and volume changes of the piezometric pipe section, as well as the type and working mode of the pressure detection unit. This method cannot eliminate the coil heat interference caused by the long-term repeated operation of the solenoid valve, nor can it eliminate the volume change caused by the impact of the air pressure on the pipeline and the movement of the valve core.

Contents of the invention

The purpose of the present invention is to provide an air-tight test bench for an electric air pump on an air bed, which is convenient and reliable to operate, and is free from measurement errors caused by factors such as air source pressure fluctuations, atmospheric pressure changes, temperature fluctuations, and slight changes in pipeline volume. .

In order to achieve the above object, the present invention provides the following technical solutions: an air bed electric air pump airtight test bench, including a machine table, the machine table is composed of pipelines, racks, electrical software and fixtures, and the fixtures are installed On the top of the machine, the pipeline and electrical software are installed inside the machine, the inside of the frame is provided with an electrical control cabinet, the outer wall of the fixture is provided with an air pump sealing area, and the inside of the fixture is provided with an air pump sealing cover The inside of the tooling fixture is provided with a linear bearing, the inside of the tooling fixture is provided with a guide rod through the rotation of the linear bearing, the outer wall of the tooling fixture is provided with a control box, the outside of the machine is provided with a pressure measuring port, and the tube Routing detection chamber, air control valve 3, air control valve 2, air control valve 1, differential pressure transmitter, marking chamber, globe valve, pressure gauge, pressure regulating valve, safety valve, solenoid valve, air source filter pressure regulating valve One is composed of air source filter pressure regulating valve two, the detection chamber is connected to the differential pressure transmitter through a pipeline, the detection chamber is connected to the air control valve three through pipelines, and the air control valve three is connected to the air control valve three. The two control valves are connected by a pipeline, the air control valve two is connected to the standard cavity pipeline through a pipeline, the differential pressure transmitter is connected to the air control valve one by a pipeline, and the air control valve one is connected to the air control valve The two valves are connected by pipelines, the air-operated valve one is connected with the shut-off valve by pipelines, the shut-off valve and the pressure regulating valve are connected by pipelines, and the pressure regulating valve and the safety valve are connected by pipelines , the safety valve is connected to the air source filter pressure regulating valve 1 through a pipeline, the air source filter pressure regulating valve 2 is connected to the electromagnetic valve through a pipeline, and the pressure difference transmitter adopts homogeneous pressure comparison.

Preferably, the detection chamber, air control valve three, air control valve two, air control valve one, differential pressure transmitter, marking cavity, stop valve, pressure regulating valve, safety valve, air source filter pressure regulating valve one and The air source filter and pressure regulator valves are connected by standard stainless steel pipe joints.

Preferably, the sealing cover plate of the air pump is located directly above the sealing area of the air pump.

Preferably, the number of the guide rods is two, and the two guide rods are respectively located on both sides of the sealed cylinder of the air pump.

Preferably, the pressure gauge is installed inside the pipeline between the stop valve and the pressure regulating valve.

The invention provides an air-tight test bench for an air-bed electric air pump. Has the following beneficial effects:

(1), the present invention sets detection chamber, air control valve 3, air control valve 2, air control valve 1, differential pressure transmitter, marking chamber, stop valve, pressure gauge, pressure regulating valve, safety valve, solenoid valve , Air source filter pressure regulating valve 1 and air source filter pressure regulating valve 2, use the air source filter pressure regulating valve 1, air source filter pressure regulating valve 2, differential pressure transmitter and pressure regulating valve to detect the pressure in time The pressure is adjusted through the pressure regulating valve, and the pressure difference transmitter is used to compare the same source pressure to achieve convenient and reliable operation. It is not affected by factors such as air source pressure fluctuations, atmospheric pressure changes, temperature fluctuations, and pipeline volume changes. The purpose of causing measurement error.

(2) In the present invention, a pressure measuring port is provided outside the machine, and the existence of the pressure measuring port can be freely matched with other equipment for use.

Description of drawings

Fig. 1 is a perspective view of the present invention;

Fig. 2 is a bottom side sectional view of the present invention;

Fig. 3 is the schematic diagram of the airtight detection of the air pump of the present invention;

Figure 4 is a schematic diagram of a traditional airtight test.

In the figure: 1 frame, 2 fixture, 3 electrical control cabinet, 4 air pump sealing area, 5 air pump sealing cover, 6 linear bearing, 7 guide rod, 8 air pump sealing cylinder, 9 control box, 10 machine, 11 measuring Pressure mouth.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

Examples of the described embodiments are shown in the drawings, wherein like or similar reference numerals designate like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

As shown in Figures 1-3, the present invention provides a technical solution: an air-bed electric air pump airtight test bench, including a machine 10, the machine 10 is composed of a pipeline, a frame 1, electrical software and a fixture 2 , the tooling fixture is installed on the top of the machine 10, the pipeline and electrical software are arranged inside the machine 10, the electrical control cabinet 3 is arranged inside the frame 1, the outer wall of the tooling fixture 2 is provided with an air pump sealing area 4, and the inside of the tooling fixture 2 is provided with The air pump sealing cover plate 5, the air pump sealing cover plate 5 is located directly above the air pump sealing area 4, the tooling fixture 2 is provided with a linear bearing 6 inside, and the tooling fixture 2 is provided with a guide rod 7 through the rotation of the linear bearing 6, and the number of the guide rods 7 is Two, two guide rods 7 are respectively located on both sides of the sealed cylinder 9 of the air pump, the outer wall of the fixture 2 is provided with a control box 9, and the outside of the machine 1 is provided with a pressure measuring port 11, which can be freely matched with other equipment by using the pressure measuring port 11 Use, the pipeline is composed of detection chamber, air control valve three, air control valve two, air control valve one, differential pressure transmitter, marking chamber, stop valve, pressure gauge, pressure regulating valve, safety valve, solenoid valve, air source filter Pressure regulating valve 1 and air source filter pressure regulating valve 2 are composed. The above-mentioned differential pressure transmitter does not use the method of comparing atmospheric pressure, but uses pressure comparison from the same source to eliminate the influence factors of altitude and temperature. The above-mentioned detection chamber and standard chamber are of the same specification and the same material, and working in the same environment, the detection chamber and the differential pressure transmitter are connected by pipelines, the detection chamber and the air control valve three are connected by pipelines, and the air control valve three and air control valve two are connected by pipelines. The air control valve 2 is connected to the standard cavity pipeline through the pipeline, the differential pressure transmitter and the air control valve 1 are connected through the pipeline, the air control valve 1 and the air control valve 2 are connected through the pipeline, and the air control valve 1 and the stop valve They are connected by pipelines, the shut-off valve and pressure regulating valve are connected by pipelines, the pressure regulating valve and safety valve are connected by pipelines, the safety valve and air source filter pressure regulating valve are connected by pipelines, the detection chamber, gas Between control valve 3, air control valve 2, air control valve 1, differential pressure transmitter, marking cavity, globe valve, pressure regulating valve, safety valve, air source filter pressure regulating valve 1 and air source filter pressure regulating valve 2 Standard stainless steel pipe joints are used to connect, and the existence of air source filter pressure regulator valve 1, air source filter pressure regulator valve 2, differential pressure transmitter and pressure regulator valve is used to detect the change of pressure in time, and the pressure is adjusted through the pressure regulator valve , the pressure gauge is fixedly installed inside the pipeline between the shut-off valve and the pressure regulating valve, and the air source filter pressure regulating valve 2 is connected to the solenoid valve through a pipeline.

When in use, in the early stage of the test, the cylinder is ventilated to press down, and the sealing surface of the air pump is pressed tightly to isolate the leakage. When the main pipeline is connected to the specified air source, the air source is filtered through the pressure regulating valve 1 and the pressure regulating valve to obtain the target air pressure value and open Air control valve 1/2/3, one air source enters the standard chamber, and the other enters the detection chamber. After a certain period of time, the interior of the pipeline reaches a gas balance. At this time, the air control valve 1/2/3 pipeline is closed for self-test. After confirming that there is no leakage in the pipeline, open the air control valve 1/2/3 for the second time to supplement the pressure loss caused by the expansion of the pipeline and the slight change in volume caused by the action of the valve core during the primary charging process. After the pressure is stable, the air control valve 1 is closed, and the pipeline reaches the secondary gas balance. After a certain period of time, close the air control valve 2/3, the comparison source and the detection source are intercepted and sealed separately, the air pressure of the comparison source is passed into the standard chamber and the high pressure port of the differential pressure transmitter, and the air pressure of the detection source is passed into the detection chamber and the differential pressure transmitter At the low-pressure port, the system starts to compare and verify the differential pressure values on both sides of the differential pressure transmitter, and stabilize after a period of time. After the air pressure is stabilized and interference factors are filtered, in the initial stage, the pressure on both sides is consistent, and the pressure difference is 0 or a fixed value. If the tested air pump in the detection chamber has quality problems and leaks, the pressure difference will continue to increase, and the system will automatically determine whether the test is qualified according to the set allowable value;

The principle of pipeline testing is: compressed air source -> primary filter decompression -> secondary precision decompression and stabilization -> primary charging -> primary balancing -> secondary charging -> secondary balancing -> under the same environment At the same time intercept the standard source and test source -> test comparison -> test completed -> pressure relief -> feedback results.

The electrical components appearing in this article are all connected with the external main controller and 220V mains electricity, and the main controller can be a conventional known device that plays a control such as a computer.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (5)

1. An air-bed electric air pump airtight test bench, including a machine (10), characterized in that: the machine (10) is composed of pipelines, racks (1), electrical software and fixtures (2) , the tooling fixture is installed on the top of the machine (10), the pipeline and electrical software are set inside the machine (10), the inside of the frame (1) is provided with an electrical control cabinet (3), the tooling The outer wall of the fixture (2) is provided with an air pump sealing area (4), the inside of the tooling fixture (2) is provided with an air pump sealing cover plate (5), and the inside of the tooling fixture (2) is provided with a linear bearing (6). The tooling fixture (2) is provided with a guide rod (7) through the rotation of the linear bearing (6), the outer wall of the tooling fixture (2) is provided with a control box (9), and the outside of the machine table (1) is provided with a pressure measuring port (11), the pipeline consists of detection chamber, air control valve three, air control valve two, air control valve one, differential pressure transmitter, marking chamber, stop valve, pressure gauge, pressure regulating valve, safety valve, solenoid valve 1. Gas source filter pressure regulating valve 1 and gas source filter pressure regulating valve 2. The detection chamber is connected to the differential pressure transmitter through pipelines, and the detection chamber and air control valve 3 are connected through pipelines. The air control valve three is connected to the air control valve two through pipelines, the air control valve two is connected to the standard chamber pipeline through pipelines, the differential pressure transmitter and air control valve one are connected through pipelines, and the air control valve two is connected through pipelines. Air control valve 1 is connected to air control valve 2 through pipelines, said air control valve 1 is connected to cut-off valve through pipelines, said cut-off valve is connected to pressure regulating valve through pipelines, and said pressure regulating valve is connected to The safety valves are connected by pipelines, the safety valve is connected with the air source filter pressure regulating valve 1 through pipelines, the air source filter pressure regulator valve 2 is connected with the solenoid valve through pipelines, and the pressure difference transmission The device adopts homogeneous pressure contrast. 2. The air-tight test bench for air bed electric air pump according to claim 1, characterized in that: the detection chamber, air control valve three, air control valve two, air control valve one, differential pressure transmitter, marking chamber , Globe valve, pressure regulating valve, safety valve, air source filter pressure regulating valve 1 and air source filter pressure regulating valve 2 are connected by standard stainless steel pipe joints. 3. The air-tight test bench for air bed electric air pump according to claim 1, characterized in that: the air pump sealing cover (5) is located directly above the air pump sealing area (4). 4. The air-tight test bench for air bed electric air pump according to claim 1, characterized in that: the number of the guide rods (7) is two, and the two guide rods (7) are respectively located in the sealing cylinder of the air pump ( 9) Both sides. 5. The airtight test bench for air bed electric air pump according to claim 1, characterized in that: the pressure gauge is installed inside the pipeline between the shut-off valve and the pressure regulating valve.