CN203009126U - Fluid automatic switching valve - Google Patents

Abstract

The utility model relates to an automatic switching valve for fluid, which comprises a whole cylinder body and its internal devices. The fluid outlet of the cylinder body can be externally connected with devices such as an oil pump to generate suction. There is a fluid outlet in the center of the upper circle of a cylindrical cylinder body, and two fluid inlets symmetrical to the axis of the circle center on the bottom of the lower circle. The fluid inlet pipe is externally connected with two filter screen devices, which can filter out impurities and tiny dross in the fluid. There is a semi-solid rotating impeller close to the round bottom part inside the cylinder body. In addition, the semi-solid rotating impeller is fixed on the lower bottom of the cylinder through a hole in the center of the circle, and can freely rotate clockwise or counterclockwise. The utility model designs an automatic switching valve for fluid, realizes double filter screens to absorb oil in turn, avoids oil absorption at the same direction and constant pressure, and reduces the inhalation and blockage of dregs. It can be applied to electric fuel pumps such as automobiles, and has broad market prospects.

Description

A fluid automatic switching valve

technical field

The utility model belongs to an automatic fluid switching device. the

Background technique

Fuel pump failure is a common problem these days. This problem can be described as follows. The source of the fuel supply system of the car is the electric fuel pump system. When the fuel pump system fails, it will cause insufficient fuel supply in the oil circuit, which will cause problems such as car stalling. According to statistics, the inherent problems of the electric motor itself, combined with the suboptimal fuel quality, led to the failure of the electric fuel pump system of the car. the

Therefore, the failure of the fuel pump is directly related to the poor filtering effect of the fuel. There are several types of existing fuel pump fuel filter devices. Its filter bag uses a single filter bag to filter impurities and dross components, and the filtering effect is not very satisfactory. the

Contents of the invention

The utility model proposes an automatic switching valve for fluids, which is used to filter fluids including fuel oil, realize double filter screens or both filter screens to absorb oil in turn, avoid oil suction in the same direction at constant pressure, and reduce the suction and blockage of dregs. Solve the problem that the single filter in the automobile fuel pump cannot filter the dregs and sundries in the fuel well. the

The technical scheme of the utility model is as follows:

An automatic switching valve for fluid, comprising a cylindrical cylinder and two or more filter devices, the upper center of the cylindrical cylinder has a fluid outlet, and the lower part has two or more fluid inlets; Each fluid inlet is terminated with a strainer assembly. The fluid inlet is set in an axisymmetric state with the center of the bottom circle of the cylinder as the center, and is close to the outside of the cylinder; a freely rotatable switching impeller with the axis of the cylinder as the axis is arranged in the cylinder, and the switching impeller One part is solid, and the other part is in the shape of rotary cut blades. When the fluid enters the cylinder from the inlet and flows through the switching impeller, the switching impeller is driven to rotate by the fluid flowing through the rotary cutting blade part, and the solid part and the rotary cutting blade part are closed and connected to the fluid inlet in order to realize the rotation of multiple filters Suction fluid, to avoid the clogging of filter screen impurities caused by one-way constant pressure suction fluid. the

According to the fluid automatic switching valve discussed in the utility model, assuming that the fluid discussed in the following part is the fuel oil of the automobile, taking two oil inlets as an example, the principle is as follows:

When the entire cylinder device is placed in a fuel tank full of oil, if the oil outlet pipe above the cylinder is connected to a fuel pump power unit, the rotation of the oil pump will generate a certain upward suction force, so the fuel in the cylinder will flow Flow upward along the oil outlet (the inside of the cylinder is the same as the outside), so the oil in the fuel tank will enter the cylinder through the oil inlet pipes A and B to supplement the lack of fluid in the cylinder. Since the rotary section of the semi-solid rotary impeller is V-shaped, all the V-shaped openings of the rotary section are oriented counterclockwise or clockwise, depending on the rotation direction of the motor, the fluid from the oil inlet pipe to the oil outlet pipe must pass through the impeller. In the gap, thus driving the rotation of the impeller. the

Considering the actual situation, the number of impellers and the rotary cutting angle will be designed to meet the parameter standards of the actual application requirements. The number of impellers and the density of relative positions determine the size of the flow. When the solid part covers the oil inlet A, only the oil inlet B communicates with the oil outlet. When the solid part covers the oil inlet B, only the oil inlet A communicates with the oil outlet. When the radial edges of the solid part are located at the two oil inlets A and B respectively, the oil inlets A and B communicate with the oil outlet at the same time. Due to the effect of inertia, the semi-solid impeller will rotate in the past, so it is in a continuous state as a whole. In this way, the cycles are rotated back and forth, so that the filter screens A and B are also cyclically switched to each other, thereby avoiding the same direction of constant pressure oil absorption and reducing the suction and blockage of dross. the

According to the above description, the utility model can also be applied according to the reverse direction of the fluid. That is, the fluid flows in from the oil outlet of the cylinder block and then flows out from the two oil inlet pipes at the bottom, so that the power device for oil suction above the cylinder block can be omitted. In this case, the direction of rotation of the semi-solid rotary impeller is opposite to that described above, but the principle is essentially the same. This paper does not make detailed supplementary explanations for these. Only certain principle explanations are provided for the main problems to be solved by the utility model. the

The utility model has the advantages that: the device is used in a system for filtering fluids including fuel oil, which can realize double filter screens or both filter screens to absorb oil in turn, avoid oil suction in the same direction at constant pressure, and reduce the suction and blockage of dross. Used in the automobile fuel system, it can filter the dregs and sundries in the fuel well, and provide a good improvement to the overall performance of the electric fuel pump. the

Of course, the device does not exclude the application in many other suitable occasions, and it can also be widely used in the general type of fluid filtration and the problem of mixed inflow of different liquids at different times. the

Description of drawings

Fig. 1 is a three-dimensional perspective view of a fluid automatic switching valve of the present utility model

Fig. 2 is a three-dimensional perspective view of the rotary impeller of the present utility model

Detailed ways

In order to explain the working principle and process of the utility model in more detail, it will be described and illustrated according to the accompanying drawings. the

1 is a three-dimensional perspective view of a fluid automatic switching valve of the present invention, omitting the part of the power unit above the oil outlet and the part of the liquid flow outside the cylinder. Including cylindrical cylinder 1, oil outlet pipe 7, circular switching impeller 2 in the cylinder, center of impeller and fixed shaft part at the bottom, oil inlet pipe A 4 and oil inlet pipe B 5, filter device A 3 and filter set B6. the

The oil outlet pipeline 7 is connected to the fluid outlet provided by the upper circle center of the cylinder body 1, and the fluid outlet of the cylinder body is at the center of the upper dome, so as to avoid the uneven force of the suction force on the impeller. The oil inlet pipes A and B are connected by two fluid inlets symmetrical about the central axis of the circle on the lower round bottom. The oil inlet pipes A and B are respectively externally connected with two filter screen devices, that is, the filter screen device A3 and the filter screen device B6, to filter out impurities and tiny foreign matter in the fluid. the

Referring to Fig. 2, there is a circular switching impeller 2 close to the round bottom part inside the cylinder, half of the circular switching impeller is a solid part 21, and the remaining half is designed as a rotary-cut impeller shape on its ring. The rotary slice 22 of the cutting impeller is V-shaped, and the angle is greater than 30 degrees and less than 60 degrees. The specific angle and the number of slices are determined according to the actual situation. In addition, the rotating impeller is fixed on the lower bottom of the cylinder through a hole in the center of the circle, and can freely rotate clockwise or counterclockwise. When the fluid outlet part of the cylinder has suction, when the fluid enters and flows through the switching impeller from the inlet, the switching impeller is pushed and rotated by the fluid flowing through the impeller part, so that the solid part and the impeller part are circularly closed and connected to multiple fluid inlets, In this way, the double filter screens can absorb oil in turn, avoiding oil absorption at the same direction and constant pressure, and reducing the suction and clogging of dross. the

Among them, the impeller is preferably close to the fluid inlet at the bottom of the cylinder so that the solid part can tightly close the inlet. The distance between the impeller inside the cylinder and the upper dome is as small as possible, so that the whole cylinder device is simple, small and convenient for practical application. the

The device can be used in many places, and fluid flow control can be performed from bottom to top, and the same is true for top to bottom control. In this article, we will explain its working principle in the automotive fuel pump system in detail:

Put the whole cylinder unit in a fuel tank filled with oil, and the oil outlet pipe above the cylinder is connected with a fuel pump power unit. If the oil pump does not rotate at this moment, the fuel in the tank will only immerse into the cylinder through one of the oil inlets, and the oil level will rise to a certain position to balance. the

When the oil pump is working, due to the principle of the oil pump device of the automobile fuel pump system, the rotation of the oil pump will generate a certain upward suction force, so the fuel in the cylinder will flow upward along the oil outlet (the inside of the cylinder is connected to the outside) , so the oil in the fuel tank will enter the cylinder through the oil inlet pipe A or B to supplement the lack of fluid in the cylinder. Since the rotary blade of the rotary impeller is V-shaped, and the impeller device is fixed on the bottom of the cylinder body through the hole in the center of the circle, the fluid must pass through the gap of the impeller from the oil inlet pipe to the oil outlet pipe, thereby driving the rotation of the impeller. The rotation of the rotating impeller causes the solid part of the impeller to cover the inlet ports A and B cyclically. When the solid part covers the oil inlet A, the oil inlet A is closed, so that the fuel flows into the cylinder from the oil inlet B, so the filter bag B plays the role of filtering, and the filter bag A is temporarily idle. At this time, the filter bag B can not only filter the dross and tiny sundries, but also play a role in pulling back some dregs and sundries adhering to the filter bag A, so it gives the filter bag A virtually Debris clean up. In the same way, when the solid part rotates to cover the hole of the oil inlet B, the filter bag A will also play the same role. the

Claims (3)

1. A fluid automatic switching valve, comprising a cylindrical cylinder and two or more filter screen devices, the upper center of the cylindrical cylinder has a fluid outlet, and the lower part has two or more fluid outlets Inlet; the end of each fluid inlet is connected with a filter device; it is characterized in that: the fluid inlet is arranged in an axisymmetric state with the center of the bottom circle of the cylinder as the center, and is close to the outside of the cylinder; there is a A freely rotatable switching impeller with the axis of the cylinder as the axis. The switching impeller is partly solid and partly in the shape of a rotary cutting blade. The fluid enters the cylinder from the inlet, flows through the switching impeller, and the switching impeller is passed through the rotary cutting blade. Part of the fluid is pushed and rotated, and the solid part and the rotary cutting blade part are closed and connected to the fluid inlet in circulation. 2. The fluid automatic switching valve according to claim 1, characterized in that: the rotary slices of the rotary blades are V-shaped, and the V-shaped openings of all the rotary slices are oriented counterclockwise or clockwise, according to the motor Depending on the direction of rotation, the V-shaped angle is greater than 30 degrees and less than 60 degrees. 3. The fluid automatic switching valve according to claim 1 or 2, characterized in that the switching impeller is fixed on the lower round bottom of the cylinder body through the center part, and is close to the fluid inlet at the bottom of the cylinder body. the

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