Low-temperature bending airtightness comprehensive testing machine for rubber composite hose used in gas appliance

Abstract

The invention discloses a low-temperature bending airtightness comprehensive testing machine for a rubber composite hose used in a gas appliance. The low-temperature bending airtightness comprehensive testing machine comprises a container used for containing cooling liquid and a carrier which is used for fixing and sealing the end of the rubber composite hose and can twist the rubber composite hose by not less than 90 degrees. The device further comprises a controller, a lifting mechanism of the carrier, a refrigeration unit installed at the bottom of the container, a temperature sensor used for monitoring cooling liquid and a switch valve of the high-pressure air source. A pressure sensor is arranged on a connecting pipe of the switch valve and the rubber composite hose. The carrier, the lifting mechanism, the refrigeration unit, the temperature sensor, the switch valve and the pressure sensor are electrically connected with the controller. The testing machine can be comprehensively applied to the airtightness test of the rubber composite hose after being bent by not less than 90 degrees under the low-temperature condition.

Description

Technical Field

[0001] The invention relates to the technical field of energy storage systems and related equipment, and in particular to a low-temperature bending air tightness comprehensive testing machine for rubber composite hoses used in gas appliances. Background Art

[0002] Gas appliances are common household appliances that burn gas for cooking and frying, and are used frequently. Since the gas used is explosive, gas leakage is the biggest hidden danger of explosions in recent years. In the accident investigation after the explosion, the problem of gas leakage was concentrated on the damage of the gas appliance hose. Therefore, in the manufacturing standards of gas appliances, quality inspections for hoses are set. Although the standards give the basic requirements for experimental instruments, they do not provide equipment that can be actually applied, which needs to be solved urgently. Summary of the invention

[0003] A technical problem to be solved by the present application is to overcome the defects of the above-mentioned related technologies and provide a low-temperature bending air tightness comprehensive testing machine for rubber composite hoses used in gas appliances.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a low-temperature bending air tightness comprehensive testing machine for rubber composite hoses used in gas appliances, including a container for containing coolant, and a carrier for fixing and sealing the end of the rubber composite hose and being able to twist the rubber composite hose by not less than 90 degrees; also includes a controller, a lifting mechanism of the carrier, a refrigeration unit installed at the bottom of the container, a temperature sensor for monitoring the coolant, and a switch valve of a high-pressure gas source, a pressure sensor is provided on the connecting pipe between the switch valve and the rubber composite hose, and the carrier, the lifting mechanism, the refrigeration unit, the temperature sensor, the switch valve and the pressure sensor are electrically connected to the controller respectively; The refrigeration unit is used to refrigerate and lower the temperature of the coolant in the container to the rated experimental temperature; The temperature sensor is used to transmit the real-time temperature of the coolant to the controller; The controller is used to control the lifting mechanism to immerse the rubber composite hose assembled on the carrier into the coolant when the temperature of the coolant drops to the rated experimental temperature, and to control the carrier to twist the rubber composite hose by no less than 90°; and to control the opening of the switch valve to allow gas to pass into the rubber composite hose, and to close the switch valve when the pressure sensor feedback reaches the experimental air pressure.

[0005] Compared with the related art, the present invention has the following advantages: by setting a lifting mechanism, one end of the rubber composite hose can be assembled on the carrier before the carrier is immersed in the coolant, and the other end of the rubber composite hose is connected to the air supply unit composed of a pressure sensor, a switch valve and a high-pressure air source; the testing machine of the present invention can be comprehensively used for the air tightness test of the rubber composite hose after being bent by not less than 90° under low temperature conditions.

[0006] Preferably, the carrier includes a bracket, a rotating shaft connected to the bracket through a sliding support bearing, a torque wheel with a rubber composite hose end sealing fixture on one side detachably connected to the bottom of the rotating shaft, and an adjustment hole for supporting the horizontal sliding of the sliding support bearing is provided on the bracket; a cylinder for driving the rotating shaft drive motor to make the rubber composite hose next to the torque wheel stick to the guide roller is fixed on the bracket. For rubber composite hoses of different diameters, the torque wheel of the corresponding diameter can be replaced, and the rotating shaft drive motor is driven by the cylinder to move to adjust the position of the torque wheel, so that the torque wheel can cooperate with the guide roller to clamp the rubber composite hose, thereby adapting to the bending requirements of rubber composite hoses of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a three-dimensional schematic diagram of the low-temperature bending air tightness comprehensive testing machine carrier of the rubber composite hose used in gas appliances of the present application when it is not immersed in coolant.

[0008] Figure 2 It is a three-dimensional schematic diagram of the bottom of the carrier of the low-temperature bending airtightness comprehensive testing machine for rubber composite hoses used in gas appliances of the present application immersed in coolant. DETAILED DESCRIPTION

[0009] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0010] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0011] The preferred embodiment is as follows Figure 1 and 2 The low-temperature bending air tightness comprehensive testing machine for rubber composite hoses used in gas appliances shown in the figure comprises a controller 1, a container 2 for containing coolant, and a carrier 3 for fixing and sealing the end of a rubber composite hose (not shown in the figure) and capable of twisting the rubber composite hose by not less than 90°; a lifting mechanism 4 of the carrier, a refrigeration unit (not shown in the figure) installed at the bottom of the container, a temperature sensor (not shown in the figure) for monitoring the coolant, a high-pressure gas tank 5 containing a high-pressure gas source, and a switch valve 6 of the high-pressure gas tank 5. A pressure sensor 7 is provided on the connecting pipe between the switch valve 6 and the rubber composite hose. The carrier 3, the lifting mechanism 4, the refrigeration unit, the temperature sensor, the switch valve 6 and the pressure sensor 7 are electrically connected to the controller 1 respectively; The refrigeration unit is used to cool the coolant in the container to a rated experimental temperature, i.e. -25±2°C; The temperature sensor is used to transmit the real-time temperature of the coolant to the controller 1; The controller 1 is used to control the lifting mechanism 4 to immerse the rubber composite hose mounted on the carrier 3 into the coolant when the temperature of the coolant drops to the rated experimental temperature, and to control the carrier 3 to twist the rubber composite hose by not less than 90° after the rubber composite hose is immersed in the coolant; and to control the opening of the switch valve 6 to pass gas into the rubber composite hose, and to close the switch valve 6 when the pressure sensor 7 feedback reaches the experimental air pressure. In this embodiment, the controller 1 adopts a PLC control box, which is installed outside the top of the experimental box (door leaf omitted), and can set control related parameters; the lifting mechanism 4 is composed of a servo motor and a screw assembly, and the servo motor is fixed to the bottom of the experimental box; the refrigeration unit can adopt semiconductors, and the hot gas is exhausted by a fan in the experimental box; the switch valve 6 adopts a solenoid valve; the experimental air pressure is 100kPa.

[0012] Preferably, the carrier 3 comprises a bracket 3.1, a rotating shaft (not shown in the figure) connected to the bracket 3.1 through a sliding support bearing (not shown in the figure), a torque wheel 3.2 with a rubber composite hose end sealing fixture (not shown in the figure) detachably connected to the bottom of the rotating shaft, the sealing fixture comprising a plug fixed to the torque wheel 3.2, a locking sleeve screwed on the plug, and the end of the rubber composite hose is fixed and sealed in cooperation with the plug during the screwing process of the locking sleeve, and the bracket 3.1 is provided with an adjustment hole (not shown in the figure) for supporting the horizontal sliding of the sliding support bearing; the bracket 3.1 is fixed with a cylinder 3.4 for driving the rotating shaft driving motor 3.3 to make the rubber composite hose next to the torque wheel 3.2 stick to the guide roller 3.5. The guide roller 3.5 is fixed to the base of the bracket 3.1, and the grid-shaped support integrated with the bracket 3.1 and the base is used to support the rubber composite hose, and the gas of the cylinder 3.4 is supplied by the high-pressure gas tank 5. The setting of the rubber composite hose end sealing fixture is designed in imitation of the air outlet pipe of the air pump. The shaft drive motor 3.3 is a stepper motor, and a torque gun can also be used.

[0013] When operating, Figure 1 As shown, before the low-temperature bending air tightness comprehensive test of the rubber composite hose, the carrier 3 is placed above the coolant, one end of the tested rubber composite hose is installed against the plug, and then the locking sleeve is screwed in to fix and seal, and the other end of the rubber composite hose is connected to the air outlet of the switch valve 6 through the locking sleeve or other sealing connectors. Then the comprehensive test machine is started, and the low-temperature bending air tightness test of the tested rubber composite hose is automatically completed under the automatic control of the controller 1.

[0014] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A low-temperature bending air tightness comprehensive testing machine for rubber composite hoses used in gas appliances, comprising a container for containing coolant, and a carrier for fixing and sealing the ends of the rubber composite hoses and capable of twisting the rubber composite hoses by not less than 90°, characterized in that: It also includes a controller, a lifting mechanism of the carrier, a refrigeration unit installed at the bottom of the container, a temperature sensor for monitoring the coolant, and a switch valve of a high-pressure gas source. A pressure sensor is provided on a connecting pipe between the switch valve and the rubber composite hose. The carrier, the lifting mechanism, the refrigeration unit, the temperature sensor, the switch valve and the pressure sensor are electrically connected to the controller respectively; The refrigeration unit is used to refrigerate and lower the temperature of the coolant in the container to the rated experimental temperature; The temperature sensor is used to transmit the real-time temperature of the coolant to the controller; The controller is used to control the lifting mechanism to immerse the rubber composite hose assembled on the carrier into the coolant when the temperature of the coolant drops to the rated experimental temperature, and to control the carrier to twist the rubber composite hose by no less than 90°; and to control the opening of the switch valve to allow gas to pass into the rubber composite hose, and to close the switch valve when the pressure sensor feedback reaches the experimental air pressure.

2. The low-temperature bending air tightness comprehensive testing machine for rubber composite hoses used in gas appliances according to claim 1 is characterized in that: The carrier includes a bracket, a rotating shaft connected to the bracket through a sliding support bearing, a torque wheel with a rubber composite hose end sealing fixture on one side being detachably connected to the bottom of the rotating shaft, and an adjustment hole for supporting the horizontal sliding of the sliding support bearing is provided on the bracket; a cylinder for driving a rotating shaft driving motor to make the rubber composite hose next to the torque wheel stick to the guide roller is fixed on the bracket.

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