Pressure refueling control device

Abstract

The utility model discloses a pressure refueling control device which is composed of a floater oil level controller, a pressure refueling control valve and two control pipes, the floater oil level controller and the pressure refueling control valve are connected through the control pipes in a dual-redundancy design, the pressure refueling control valve is installed at the bottom of an oil tank, and the floater oil level controller and the pressure refueling control valve are connected through the control pipes. The floater oil level controller is mounted at the top of the oil tank; two cone valve assemblies connected in parallel, two floater assemblies connected in parallel and two electromagnet assemblies connected in parallel are arranged in the floater oil level controller, the floater assemblies are arranged above the electromagnet assemblies, and the cone valve assemblies are arranged on one sides of the floater assemblies; a first pipe nozzle is arranged at the bottom of the side, close to the cone valve assembly, of the floater oil level controller. A piston valve assembly and a diaphragm valve assembly are arranged in the pressure refueling control valve and connected in series, the piston valve assembly is arranged above the diaphragm valve assembly, and a second pipe nozzle is arranged at the top of the pressure refueling control valve. One end of the control pipe is connected with the nozzle I, and the other end is connected with the nozzle II. And a dual-redundancy design is adopted, so that the turn-off reliability is improved.

Description

Technical Field

[0001] The utility model relates to a pressure refueling control technology for a fuel system, in particular to a pressure refueling control device. Background Art

[0002] The pressure refueling control device is a common refueling control subsystem in the fuel system. It is installed inside the fuel tank and consists of a pressure refueling control valve, a float oil level controller and a control pipe.

[0003] The reliability of traditional single-redundant pressure refueling control devices is prone to single point failures. Utility Model Content

[0004] The technical solution of the utility model is as follows: A pressure refueling control device consists of a float oil level controller, a pressure refueling control valve, and a control pipe. Two control pipes are provided. The float oil level controller and the pressure refueling control valve are connected through the control pipe with a double redundancy design. The pressure refueling control valve is installed at the bottom of the oil tank, and the float oil level controller is installed at the top of the oil tank; two parallel cone valve assemblies, two parallel float assemblies, and two parallel electromagnet assemblies are provided inside the float oil level controller, the float assembly is placed above the electromagnet assembly, and the cone valve assembly is placed on one side of the float assembly; the float oil level controller is also provided with a nozzle 1 at the bottom of one side close to the cone valve assembly; the pressure refueling control valve is provided with a piston valve assembly and a diaphragm valve assembly in series, the piston valve assembly is placed above the diaphragm valve assembly, and the top of the pressure refueling control valve is also provided with a nozzle 2; one end of the control pipe is connected to the nozzle 1, and the other end is connected to the nozzle 2.

[0005] The cone valve assembly includes a cone valve, pin 1, pin 2, a gasket, a guide sleeve, and a connecting rod; the cone valve and the connecting rod are linked by pin 1, and the guide sleeve is arranged in the middle of the connecting rod; a rocker arm is provided on the top of the float assembly, and the rocker arm and the connecting rod are linked by pin 2, and the gasket is arranged on the outside of one end of the rocker arm away from the float assembly.

[0006] A push rod is provided above the electromagnet assembly, and the push rod is located below the float assembly.

[0007] The piston valve assembly has an upper piston cavity inside, and a first return spring is arranged inside the upper piston cavity; the diaphragm valve assembly has a lower diaphragm cavity inside, and a second return spring is arranged inside the lower diaphragm cavity.

[0008] The pressure refueling control valve features two valves connected in series; closing either valve shuts off refueling. The float oil level controller also features two parallel-connected poppet valve assemblies. Closing either poppet valve assembly shuts off refueling. The float oil level controller also features two parallel-connected float assemblies, which drive the poppet valve assembly, opening and closing it. The float oil level controller also features two parallel-connected electromagnet assemblies; either electromagnet assembly actuates the ejector rod, raising the float. The float and poppet valve assemblies are linked.

[0009] The pressure refueling control valve and the float oil level controller are connected through two control pipes, wherein the pressure refueling control valve is installed at the bottom of the fuel tank and the float oil level controller is installed at a designated position on the top of the fuel tank.

[0010] Beneficial effects of the utility model:

[0011] (1) There are two valves in series inside the pressure refueling control valve. The refueling cut-off function can be achieved by closing either valve.

[0012] (2) There are two sets of parallel cone valve assemblies inside the float oil level controller. The refueling cut-off function can be achieved by closing any one of the cone valve assemblies.

[0013] (3) The float oil level controller has two sets of parallel float assemblies inside. The float assembly drives the cone valve assembly to perform opening and closing actions.

[0014] (4) There are two sets of parallel electromagnet assemblies inside the float oil level controller. Any one of the electromagnet assemblies can drive the push rod to lift the float.

[0015] (5) The dual-redundancy design enables the device to avoid the dangerous situation of fuel overflow when a single control system fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments of the present invention and, together with the specification, explaining the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0017] Figure 1 This is a schematic diagram of the initial state structure of the float oil level controller in the pressure refueling control device provided by the utility model;

[0018] Figure 2 This is a schematic diagram of the initial state structure of the pressure refueling control device provided by the utility model;

[0019] Figure 3 This is a schematic structural diagram of the cut-off state of the float oil level controller in the pressure refueling control device provided by the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the pressure refueling control device provided by the utility model in the cut-off state;

[0021] In the attached figure: 1- float oil level controller,

[0022] 11- cone valve assembly, 111- cone valve, 112- pin 1, 113- pin 2, 114- gasket, 115- guide sleeve, 116- connecting rod

[0023] 12-Float assembly, 121-rocker arm, 122-float response liquid level line

[0024] 13-electromagnet assembly, 131-rod

[0025] 14-Nozzle 1

[0026] 2-pressure refueling control valve, 21-piston valve assembly, 22-diaphragm valve assembly, 23-return spring 1, 24-return spring 2, 25-upper piston chamber, 26-lower diaphragm chamber, 27-nozzle 2

[0027] 3- Control tube. DETAILED DESCRIPTION

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0029] See also Figure 1-4The pressure refueling control device is composed of a float oil level controller 1, a pressure refueling control valve 2, and a control pipe 3. There are two control pipes 3. The float oil level controller 1 and the pressure refueling control valve 2 are connected through the control pipe 3 using a double-redundant design. The pressure refueling control valve 2 is installed at the bottom of the oil tank, and the float oil level controller 1 is installed at the top of the oil tank. The float oil level controller 1 is internally provided with two parallel cone valve assemblies 11, two parallel float assemblies 12, and two parallel electromagnet assemblies 13. The float assembly 12 The float oil level controller 1 is positioned above the electromagnet assembly 13, and the cone valve assembly 11 is positioned to one side of the float assembly 12. A nozzle 14 is also provided at the bottom of the float oil level controller 1, near the cone valve assembly 11. The pressure refueling control valve 2 is internally provided with a piston valve assembly 21 and a diaphragm valve assembly 22, which are connected in series. The piston valve assembly 21 is positioned above the diaphragm valve assembly 22, and a nozzle 27 is also provided at the top of the pressure refueling control valve 2. One end of the control tube 3 is connected to nozzle 14, and the other end is connected to nozzle 2 27. The pressure refueling control valve 2 is internally provided with two valves connected in series; closing either valve can achieve the refueling shut-off function.

[0030] The cone valve assembly 11 includes a cone valve 111, a pin 112, a pin 2 113, a gasket 114, a guide sleeve 115, and a connecting rod 116; the cone valve 111 and the connecting rod 116 are linked by the pin 112, and the guide sleeve 115 is arranged in the middle of the connecting rod 116; a rocker arm 121 is provided at the top of the float assembly 12, and the rocker arm 121 and the connecting rod 116 are linked by the pin 2 113, and the gasket 114 is arranged on the outside of the rocker arm 121 away from the float assembly 12.

[0031] A push rod 131 is provided above the electromagnet assembly 13, and the push rod 131 is located below the float assembly 12; an upper piston chamber 25 is provided inside the piston valve assembly 21, and a return spring 1 23 is provided inside the upper piston chamber 25; a lower diaphragm chamber 26 is provided inside the diaphragm valve assembly 22, and a return spring 24 is provided inside the lower diaphragm chamber 26; a float response liquid level line 122 is also provided on the outer side of the middle part of the float assembly 12.

[0032] The two cavities are naturally surrounded by valves, shells, etc., and have three functions: first, to provide installation space for the spring; second, to provide the space required for the stroke of the piston valve and diaphragm valve; third, the piston cavity relies on the piston's own radial sealing ring to provide sealing, so that pressure can be built up when the cone valve is closed; the diaphragm cavity relies on the diaphragm to provide sealing, so that pressure can be built up when the cone valve is closed.

[0033] The float oil level controller is equipped with two parallel float assemblies 12, which drive the cone valve assembly 11, causing it to open and close. The pressure refueling control valve 2 is equipped with two valves in series; closing either valve shuts off the refueling. The float oil level controller 1 is equipped with two parallel cone valve assemblies 11, which drive the cone valve assembly 11, causing it to open and close.

[0034] The float assembly 12 and the cone valve assembly 11 are in a linkage relationship. When the oil level is lower than the float response liquid level line 122, the cone valve assembly 11 opens to ensure that the inner cavity of the pressure refueling control valve valve is in a pressure-releasing state; when the oil level is higher than the float response liquid level line 122, the cone valve assembly 11 closes to ensure that the inner cavity of the pressure refueling control valve valve is in a non-pressure-releasing state.

[0035] Two parallel electromagnet assemblies 13 are provided inside the float oil level controller 1. Any one of the electromagnet assemblies 13 drives the push rod 131 to lift the float assembly 12, thereby lifting the rocker arm 121, and linking the linkage rod 116 to make the cone valve 111 fall and enter the cut-off state.

[0036] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of the present invention. Any modification or equivalent substitution of the technical solution of the present invention made by ordinary technicians in this field shall be included in the scope of the claims of the present invention as long as it does not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A pressure refueling control device, characterized in that: The invention comprises a float oil level controller (1), a pressure refueling control valve (2), and a control pipe (3). The control pipes (3) are provided with two. The float oil level controller (1) and the pressure refueling control valve (2) are connected through the control pipe (3) in a double-redundant design. The pressure refueling control valve (2) is installed at the bottom of the oil tank, and the float oil level controller (1) is installed at the top of the oil tank. The float oil level controller (1) is provided with two parallel cone valve assemblies (11), two parallel float assemblies (12), and two parallel electromagnet assemblies (13). The float assemblies (12) are placed on the electromagnets. The cone valve assembly (11) is placed above the iron assembly (13) on one side of the float assembly (12); the bottom of the float oil level controller (1) close to the cone valve assembly (11) is also provided with a nozzle 1 (14); a piston valve assembly (21) and a diaphragm valve assembly (22) are provided in series inside the pressure refueling control valve (2), the piston valve assembly (21) is placed above the diaphragm valve assembly (22), and a nozzle 2 (27) is also provided on the top of the pressure refueling control valve (2); one end of the control pipe (3) is connected to the nozzle 1 (14), and the other end is connected to the nozzle 2 (27).

2. The pressure refueling control device according to claim 1, characterized in that: The cone valve assembly (11) comprises a cone valve (111), a first pin (112), a second pin (113), a gasket (114), a guide sleeve (115), and a linkage rod (116); the cone valve (111) and the linkage rod (116) are linked by the first pin (112), and the guide sleeve (115) is arranged at the middle of the linkage rod (116); a rocker arm (121) is provided at the top of the float assembly (12), the rocker arm (121) and the linkage rod (116) are linked by the second pin (113), and the gasket (114) is arranged on the outside of one end of the rocker arm (121) away from the float assembly (12).

3. The pressure refueling control device according to claim 1, characterized in that: A push rod (131) is provided above the electromagnet assembly (13), and the push rod (131) is located below the float assembly (12).

4. The pressure refueling control device according to claim 1, characterized in that: The piston valve assembly (21) has an upper piston chamber (25) inside, and a return spring (23) is provided inside the upper piston chamber (25); the diaphragm valve assembly (22) has a lower diaphragm chamber (26) inside, and a return spring (24) is provided inside the lower diaphragm chamber (26).

5. The pressure refueling control device according to claim 1, characterized in that: A float response liquid level line (122) is also provided on the outer side of the middle portion of the float assembly (12).

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