Aircraft kitchen equipment test device

Abstract

The utility model discloses an aircraft kitchen equipment testing device, including a shell, a water supply unit is arranged inside the shell, the water supply unit includes a water inlet, a first liquid storage tank, a centrifugal water pump, a pressure transmitter and three water outlet channels; the device also includes a standby water supply unit inside, the standby water supply unit includes an air inlet, a second liquid storage tank, a pressure regulating valve, a fourth check valve, a first valve, a fifth valve and a sixth valve. The utility model provides convenient conditions for testing kitchen equipment by improving the water supply method of kitchen equipment; the utility model controls the water supply of the water pump through the frequency converter PID to solve the problem of unstable water supply pressure of the existing test equipment, and avoids the problem that individual delivered parts cannot be installed through the simulated installation test of the guide rail accessories.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical devices and transportation, and particularly relates to an aircraft kitchen equipment testing device. Background Art

[0002] Aircraft kitchen equipment refers to the kitchen equipment of civil aircraft, including beverage machines, coffee pots, water boilers, steam ovens, etc. Aircraft kitchen equipment needs to be supplied with water during testing, and the water supply pressure needs to be stably maintained within a range (usually required to be 25±5PSI, with a floating value of about 34.5kpa).

[0003] Most of the existing aircraft kitchen equipment test equipment uses the city water supply system, external gas source pressure supply, and booster pumps and pressure reducing valves / proportional valves to supply water to aircraft kitchen equipment. The use of the city water supply system will be affected by the pressure of the water supply pipeline, resulting in insufficient water supply pressure during peak water consumption and sudden changes in water supply pressure, which will affect the output pressure and flow.

[0004] Using an external gas source to supply pressure is to pressurize the liquid in the liquid storage tank through an external high-pressure gas source to reach the water pressure required for the test. With this water supply method, the water supply pressure is greatly affected by the external high-pressure gas source, and the strength requirements of the liquid storage tank are relatively high. It is more difficult to replenish water when the pressure in the tank is high.

[0005] When using a booster pump and a pressure reducing valve / proportional valve to supply water, the booster pump needs to work at rated power throughout the entire process, which will result in a large waste of energy. In addition, when using a proportional valve, the output pressure and flow are affected by load changes. Although the proportional valve has pressure compensation performance, its output pressure and flow may be affected when the load changes. Utility Model Content

[0006] In view of this, the purpose of the present invention is to provide an aircraft kitchen equipment testing device. The purpose is to provide an aircraft kitchen equipment testing device that can improve the pressure supply quality in view of the shortcomings of the prior art.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] The aircraft kitchen equipment testing device of the utility model comprises a shell, a water supply unit is arranged inside the shell, and the water supply unit comprises a water inlet, a first liquid storage tank, a centrifugal water pump, a pressure transmitter and three water outlet channels;

[0009] The water inlet is connected to the water inlet of the first liquid storage tank through a pipeline, the first liquid storage tank has a built-in float valve, the water outlet of the first liquid storage tank is connected to the input end of the centrifugal water pump through a pipeline, and the output end of the centrifugal water pump is connected to the water inlet end of the three-way water outlet channel through a pipeline; the pressure transmitter connected to the outlet of the centrifugal water pump converts the liquid pressure in the pipeline into an electrical signal and transmits it to the frequency converter, the frequency converter adjusts the output frequency and voltage according to the received electrical signal, changes the power output of the centrifugal water pump, thereby realizing closed-loop control of the water supply pressure;

[0010] The water supply pipelines of the three water outlet channels are divided into three flow gradients, and each water outlet channel is composed of a valve, a flow meter and a one-way valve connected in series.

[0011] Furthermore, the aircraft kitchen equipment testing device also includes a backup water supply unit, which includes an air inlet, a second liquid storage tank, a pressure regulating valve, a fourth one-way valve, a first valve, a fifth valve and a sixth valve. An external air source delivers gas to the upper part of the second liquid storage tank through the air inlet, the pressure regulating valve and the fourth one-way valve. The bottom of the second liquid storage tank is connected to the water inlet through the fifth valve in one way and to the backup water outlet through the first valve in another way.

[0012] Furthermore, the outer shell is also provided with a guide rail accessory, the size data of which is consistent with the guide rail assembly for installing the kitchen equipment on the aircraft, and a water supply and power supply interface is reserved, and the outer shell is fixed on the test station of the test equipment by a detachable connection.

[0013] Furthermore, an operation panel and a plurality of instrument display panels are also provided on the housing.

[0014] The beneficial effects of the utility model are as follows: the utility model provides convenient conditions for testing kitchen equipment by improving the water supply method of kitchen equipment; the utility model controls the water supply of the water pump through the frequency converter PID, thereby solving the problem of unstable water supply pressure of the existing testing equipment, and avoids the problem that individual delivered parts cannot be installed through the simulated installation test through the guide rail accessories.

[0015] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings, in which:

[0017] Figure 1It is a schematic diagram of the connection of the internal components of the utility model;

[0018] Figure 2 It is a schematic diagram of the external structure of the utility model. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, rather than for limiting the protection scope of the present invention.

[0020] The aircraft kitchen equipment testing device of this embodiment includes a housing, a water supply unit is arranged inside the housing, and the water supply unit includes a water inlet, a first liquid storage tank, a centrifugal water pump C1, a pressure transmitter P1 and three water outlet channels;

[0021] The water inlet is connected to the water inlet of the first liquid storage tank through a pipeline. The first liquid storage tank has a built-in float valve Q1. The water outlet of the first liquid storage tank is connected to the input end of the centrifugal water pump C1 through a pipeline. After the output end of the centrifugal water pump C1 is connected to the pressure transmitter P1, it is connected to the water inlet end of the three-way water outlet channel through a pipeline, wherein a pressure gauge E2 is arranged on the pipeline between the centrifugal water pump C1 and the pressure transmitter P1; the pressure transmitter P1 connected to the outlet of the centrifugal water pump C1 converts the liquid pressure in the pipeline into an electrical signal and transmits it to the frequency converter VFD. The frequency converter VFD adjusts the output frequency and voltage according to the received electrical signal, changes the power output of the centrifugal water pump C1, thereby realizing closed-loop control of the water supply pressure. The water supply part is a PID control loop, and the float valve Q1 automatically controls the water level in the first liquid storage tank to keep it full of water. Closed-loop control is to feed back the output to the input and affect the change of the input. For example, a certain frequency is set for the water supply pump inverter. At this time, the water supply pressure generated by the water pump will be fed back to the controller. If the pressure is not equal to the set pressure, the controller will change the set frequency of the inverter to change the output water supply pressure to approach the target pressure. In this field, PID control is a conventional technical means well known to technicians in this field, and it can be set as needed.

[0022] The water supply pipelines of the three water outlet channels are divided into three flow gradients, and each water outlet channel is composed of valves, high-precision flow meters and one-way valves connected in series in sequence. The first water outlet channel includes the second valve Q2, the first flow meter VA1 and the first one-way valve A1, and the first one-way valve A1 is connected to the first water outlet; the second water outlet channel includes the third valve Q3, the second flow meter VA2 and the second one-way valve A2, and the second one-way valve A2 is connected to the second water outlet; the third water outlet channel includes the fourth valve Q4, the third flow meter VA3 and the third one-way valve A3, and the third one-way valve A3 is connected to the third water outlet.

[0023] The aircraft kitchen equipment testing device also includes a backup water supply unit, which includes an air inlet, a second liquid storage tank, a pressure regulating valve G1, a fourth one-way valve A4, a first valve Q1, a fifth valve Q5 and a sixth valve Q6. An external air source delivers gas to the upper part of the second liquid storage tank through the air inlet, the pressure regulating valve G1 and the fourth one-way valve A4, and is connected to the pressure relief hole through the sixth valve Q6. The bottom of the second liquid storage tank is connected to the water inlet through the fifth valve Q5 on one way, and is connected to the backup water outlet on the other way through the first valve Q1. A pressure gauge E1 is provided on this pipeline.

[0024] Considering that some models of aircraft kitchen equipment (beverage machines, coffee pots, kettles) use guide rails and locating pins to assist in installation in order to ensure that the power supply interface and the water supply interface are accurately connected during installation. However, physical damage to the guide rails and locating pins caused by these devices during disassembly and transportation will cause the equipment to be unable to be installed and used. Existing equipment cannot detect such damage. At present, maintenance units will measure the relative positions of the guide rails and locating pins to avoid this situation. However, this operation is only an experience and habitual behavior, and it will be omitted due to the work experience and consciousness of the maintenance personnel, resulting in the inability to install the delivered equipment. In view of this situation, a guide rail accessory is also provided on the outer shell of this embodiment. The size data is consistent with the guide rail assembly for installing the kitchen equipment on the aircraft, and water supply and power supply interfaces are reserved, which are fixed to the test station of the test equipment through a detachable connection. Through this guide rail accessory, it is possible to test whether the guide rails and locating pins on the aircraft are damaged.

[0025] An operation panel and multiple instrument display panels are also provided on the casing. In this embodiment, they mainly include a frequency converter control panel, a pressure gauge for the air source booster water supply circuit, a pressure gauge for the PID control water supply circuit, a high-precision float flowmeter, a 220V auxiliary power socket, a 115V single-phase socket, and a 115V three-phase socket.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. Aircraft kitchen equipment testing device, characterized by: The aircraft kitchen equipment testing device comprises a shell, a water supply unit is arranged inside the shell, and the water supply unit comprises a water inlet, a first liquid storage tank, a centrifugal water pump, a pressure transmitter and three water outlet channels; The water inlet is connected to the water inlet of the first liquid storage tank through a pipeline, the first liquid storage tank has a built-in float valve, the water outlet of the first liquid storage tank is connected to the input end of the centrifugal water pump through a pipeline, and the output end of the centrifugal water pump is connected to the water inlet end of the three-way water outlet channel through a pipeline; the pressure transmitter connected to the outlet of the centrifugal water pump converts the liquid pressure in the pipeline into an electrical signal and transmits it to the frequency converter, the frequency converter adjusts the output frequency and voltage according to the received electrical signal, changes the power output of the centrifugal water pump, thereby realizing closed-loop control of the water supply pressure; The water supply pipelines of the three water outlet channels are divided into three flow gradients, and each water outlet channel is composed of a valve, a flow meter and a one-way valve connected in series.

2. The aircraft kitchen equipment testing device according to claim 1, characterized in that: The aircraft kitchen equipment testing device also includes a backup water supply unit, which includes an air inlet, a second liquid storage tank, a pressure regulating valve, a fourth one-way valve, a first valve, a fifth valve and a sixth valve. An external air source delivers gas to the upper part of the second liquid storage tank through the air inlet, the pressure regulating valve and the fourth one-way valve. The bottom of the second liquid storage tank is connected to the water inlet through the fifth valve in one way and to the backup water outlet through the first valve in another way.

3. The aircraft kitchen equipment testing device according to claim 1 or 2, characterized in that: The outer shell is also provided with a guide rail accessory, the size data of which is consistent with the guide rail assembly for installing the kitchen equipment on the aircraft, and a water supply and power supply interface is reserved, and the outer shell is fixed on the test station of the test equipment by a detachable connection.

4. The aircraft kitchen equipment testing device according to claim 3, characterized in that: The housing is also provided with an operation panel and a plurality of instrument display panels.

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