A method for flow regulation for a fuel dispenser

Abstract

The present application relates to the technical field of oiling machine, and particularly relates to a flow regulating method for an oiling machine. A coupling is installed on a motor, and the coupling is connected with an output end of a gear pump. The gear pump is used for oil supply. The gear pump, an oil suction filter, a second adjustable flow valve, a first-stage filter and a second-stage filter are connected in series. The gear pump is started to make hydraulic oil in an oil tank pass through the oil suction filter, the second adjustable flow valve, the first-stage filter and the second-stage filter, and then output the hydraulic oil to an oil tank. The first adjustable flow valve is connected in parallel between the oil suction filter and the first adjustable flow valve to play a role of flow distribution and flow regulation. In the present application, the hydraulic oil at the outlet of the quantitative pump of the oiling machine is distributed to the oil suction port of the pump through the parallel throttling valve to realize flow regulation, and the parallel fixed damping hole at the outlet of the pump is used as a safety valve.

Description

Technical Field

[0001] This invention patent relates to the field of fuel dispenser technology, and in particular to a flow rate regulation method for fuel dispensers. Background Technology

[0002] When refueling hydraulic system oil tanks, a fuel dispenser is generally used. Currently, fuel dispensers on the market typically use a three-phase motor with a fixed speed to drive a metering pump, and the flow rate is not adjustable. Since the oil tank filler port is usually equipped with an air filter, the oil from the fuel dispenser must pass through the filter screen of the tank's air filter before entering the tank. Because oil tanks vary in size, smaller tanks often overflow due to insufficient flow capacity caused by the smaller size of the air filter.

[0003] There are many ways to achieve flow regulation, such as using a servo motor to drive a metering pump and adjusting the flow rate by changing the motor speed, or using a variable pump. However, both of these methods are very expensive. The reason why flow-regulating fuel dispensers are not commonly found on the market is that the market is very price-sensitive, leading to competition based on low prices and low quality.

[0004] The purpose of this invention patent is to address the problems existing in the background technology by proposing a flow regulation method for fuel dispensers.

[0005] The technical solution of this invention patent: A flow regulation method for a fuel dispenser, comprising a motor, a coupling, a gear pump, an oil suction filter, a first adjustable flow valve, a second adjustable flow valve, a fixed damping orifice, a primary filter, and a secondary filter. The motor is mounted on the coupling, which is connected to the output end of the gear pump. The gear pump is used for oil supply. The gear pump, the oil suction filter, the second adjustable flow valve, the primary filter, and the secondary filter are connected in series. Starting the gear pump causes hydraulic oil in the oil tank to pass through the oil suction filter, and then through the second adjustable flow valve, the primary filter, and the secondary filter to output hydraulic oil to the oil tank. The first adjustable flow valve is connected in parallel between the oil suction filter and the first adjustable flow valve to serve as a diversion and flow regulation mechanism.

[0006] When no flow rate adjustment is needed, the first adjustable flow valve is completely closed and the second adjustable flow valve is completely open, allowing the gear pump to output its full flow rate. When the refueling flow rate needs to be reduced, the opening of the second adjustable flow valve is reduced to increase the outlet pressure of the gear pump. Then, the opening of the first adjustable flow valve is increased to reduce the outward flow rate of the refueling machine. This allows the first and second adjustable flow valves to achieve different flow rate adjustments.

[0007] Preferably, the first adjustable flow valve and the second adjustable flow valve are equipped with the fixed damping orifice.

[0008] Compared with existing technologies, the beneficial effects of this invention patent are:

[0009] This solution diverts the hydraulic oil from the fuel dispenser's metering pump outlet to the pump suction port via a parallel throttle valve to achieve flow regulation. A parallel fixed damping orifice at the pump outlet serves as a safety valve to prevent excessive pump outlet pressure. A throttle valve is added to the fuel dispenser pump outlet to regulate the pump outlet pressure, thereby enhancing the flow capacity of the bypass throttle valve.

[0010] Compared to existing technologies, this solution changes the current situation where most fuel dispensers on the market have non-adjustable flow rates. It also innovatively diverts the pump outlet flow to the oil suction port to achieve flow rate adjustment, without significantly increasing costs. Furthermore, it facilitates refueling the tank, prevents hydraulic oil overflow, and improves refueling efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a flow regulation method for a fuel dispenser proposed in this invention patent.

[0012] Reference numerals: 1. Motor; 2. Coupling; 3. Gear pump; 4. Suction filter; 5. First adjustable flow valve; 6. Second adjustable flow valve; 7. Fixed damping orifice; 8. Primary filter; 9. Secondary filter. Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Example

[0014] See attached document Figure 1 A flow regulation method for a fuel dispenser includes a motor 1, a coupling 2, a gear pump 3, an oil suction filter 4, a first adjustable flow valve 5, a second adjustable flow valve 6, a fixed damping orifice 7, a primary filter 8, and a secondary filter 9. The motor 1 is equipped with a coupling 2, which is connected to the output end of the gear pump 3. The gear pump 3 is used for oil supply. The gear pump 3, the oil suction filter 4, the second adjustable flow valve 6, the primary filter 8, and the secondary filter 9 are connected in series. When the gear pump 3 is started, the hydraulic oil in the oil tank passes through the oil suction filter 4, and is output to the oil tank through the second adjustable flow valve 6, the primary filter 8, and the secondary filter 9. The first adjustable flow valve 5 is connected in parallel between the oil suction filter 4 and the first adjustable flow valve 9 to serve as a diversion and flow regulation function.

[0015] When flow rate adjustment is not required, the first adjustable flow valve 5 is completely closed and the second adjustable flow valve 6 is completely open, allowing the gear pump 3 to output its full flow. When the refueling flow rate needs to be reduced, the opening of the second adjustable flow valve 6 is reduced, causing the outlet pressure of the gear pump 3 to increase. Then, the opening of the first adjustable flow valve 5 is increased, reducing the external flow rate of the refueling machine. Since the oil inlet of the gear pump 3 is generally under negative pressure, a portion of the hydraulic oil at the outlet of the gear pump 3 will be diverted to the oil inlet of the gear pump 3 through the throttle valve, the first adjustable flow valve 5, thus reducing the external flow rate of the refueling machine. This allows for different flow rate adjustments through the first adjustable flow valve 5 and the second adjustable flow valve 6. The opening of the first adjustable flow valve 5 and the second adjustable flow valve 6 can be manually adjusted. Furthermore, the gear pump 3 is not limited to a gear pump; it can also be replaced with a screw pump, vane pump, or other fixed displacement pump. Alternatively, the first adjustable flow valve 5 and the second adjustable flow valve 6 can be replaced with ball valves, and the flow rate can be adjusted by regulating the opening of the ball valves. Example

[0016] See attached document Figure 1 Based on Embodiment 1, the first adjustable flow valve 5 and the second adjustable flow valve 6 are equipped with a fixed damping hole 7. The fixed damping hole 7 serves to prevent the gear pump 3 from being damaged due to high pressure if the first adjustable flow valve 5 and the second adjustable flow valve 6 are completely closed.

[0017] In the description of this invention patent, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention patent and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention patent.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention patent, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flow regulation method for a fuel dispenser, characterized by, Including motor (1), shaft coupling (2), gear pump (3), oil filter (4), first adjustable flow valve (5), second adjustable flow valve (6), fixed damping hole (7), primary filter (8) and secondary filter (9), the motor (1) is installed with the shaft coupling (2), the shaft coupling (2) and the output end of gear pump (3) are connected, the gear pump (3) is used for oil supply, the gear pump (3), the oil filter (4), the second adjustable flow valve (6), the primary filter (8) and the secondary filter (9) are series circuit, starting the gear pump (3) makes the hydraulic oil in the oil tank pass through the oil filter (4), passes through the second adjustable flow valve (6), the primary filter (8), the secondary filter (9) and exports hydraulic oil to the oil tank, the first adjustable flow valve (5) is connected between the oil outlet of the oil filter (4) and the oil inlet of the second adjustable flow valve (6) and plays the role of flow distribution and flow regulation; When the flow is not required to be adjusted, the first adjustable flow valve (5) is completely closed, the second adjustable flow valve (6) is completely opened, the gear pump (3) outlet flow is completely exported, when the oil filling flow needs to be reduced, by reducing the opening of the second adjustable flow valve (6), the gear pump (3) outlet pressure is increased, then the opening of the first adjustable flow valve (5) is increased, so that the external output flow of the oil dispenser will be reduced, so that the first adjustable flow valve (5) and the second adjustable flow valve (6) are used to realize the adjustment of different flow, the fixed damping hole (7) is connected between the oil inlet and the oil outlet of the second adjustable flow valve (6), and the fixed damping hole (7) is connected with the oil outlet of the gear pump (3) and the first adjustable flow valve (5).

Images