Switch valve, power fuel system and aircraft

Abstract

The utility model discloses a switch valve, a power fuel system and an aircraft, and relates to the technical field of valves. The valve body is used for being installed on an oil supply pipeline of a power fuel oil system. The valve rod is located in the valve body and used for controlling oil supply of the power fuel oil system. The knob has a first state and a second state, the first state of the knob is that the knob is connected with the valve rod, and the knob can drive the valve rod to rotate so as to control oil supply of the power fuel system, and the second state of the knob is that the knob is separated from the valve rod, and the knob is movably connected with the valve rod, so that the knob is switched between the first state and the second state. According to the switching valve provided by the invention, the knob is movably connected with the valve rod, so that the knob can be switched between the first state and the second state, the bad influence of vibration generated by an engine and a rotor wing on the switching valve can be avoided, and the problem that the switching valve of a fuel system is automatically closed due to vibration is solved; and normal oil supply of a power fuel oil system is ensured.

Description

Technical Field

[0001] This application relates to the field of valve technology, and more specifically, to a switching valve, a power fuel system, and an aircraft. Background Technology

[0002] In related fields, the engines and rotors of aircraft will inevitably vibrate. However, this vibration will cause the fuel system's switching valves to shut down automatically, preventing the fuel system from supplying fuel normally, causing the engine to stop, and thus causing the aircraft to crash.

[0003] Therefore, how to solve the problem of automatic closure of the fuel system's switching valves due to vibration has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a switching valve to solve the problem of automatic closure of the switching valve of the fuel system caused by vibration.

[0005] Another object of this application is to provide a power fuel system having the aforementioned switching valve.

[0006] Another objective of this application is to provide an aircraft having the aforementioned power fuel system.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A switching valve, comprising:

[0009] Valve body, used for installation on the fuel supply line of the power fuel system;

[0010] A valve stem, located within the valve body, is used to control the fuel supply of the power fuel system;

[0011] The knob has a first state and a second state. In the first state, the knob is connected to the valve stem and can drive the valve stem to rotate to control the fuel supply of the power system. In the second state, the knob is disengaged from the valve stem and is movably connected to the valve stem so that the knob can switch between the first state and the second state.

[0012] Optionally, in the above-described switching valve, the knob is connected to the valve stem via a fastener, and the knob can move along the fastener toward or away from the valve stem to switch the knob between the first state and the second state.

[0013] Optionally, in the above-mentioned switching valve, a reset elastic element is sleeved on the outside of the fastener, and one end of the reset elastic element abuts against the knob, while the other end of the reset elastic element abuts against the valve stem.

[0014] Optionally, in the above-mentioned switching valve, the valve stem is provided with a threaded hole that mates with the fastener.

[0015] Optionally, in the above-mentioned switching valve, the knob is provided with a groove for accommodating the fastener.

[0016] Optionally, in the above-mentioned switching valve, the valve stem has a first end and a second end disposed opposite to each other. The first end of the valve stem is provided with a flow hole for fuel to flow through the power fuel system. The second end of the valve stem is used to engage with the knob through a concave-convex fit, so that the knob drives the flow hole of the valve stem to switch between a direction perpendicular to the fuel supply line and a direction parallel to the fuel supply line.

[0017] Optionally, in the above-mentioned switching valve, the valve body is provided with a groove for cooperating with the knob, and the end face of the knob is provided with a protrusion that can move within the groove, so that the protrusion of the knob can move circumferentially within the groove.

[0018] Optionally, the above-mentioned switching valve further includes an adapter connected to one end of the valve body, the other end of the valve body being used to connect to the fuel inlet hose of the power fuel system, and the adapter being used to connect to the fuel outlet hose of the power fuel system.

[0019] A power fuel system, including a switching valve as described in any of the preceding claims.

[0020] An aircraft comprising the power fuel system described above.

[0021] The switching valve provided in this application is installed on the fuel supply line of the power fuel system via a valve body, with the valve stem located within the valve body to control the fuel supply of the power fuel system. Simultaneously, a knob is movably connected to the valve stem, allowing the knob to switch between a first state and a second state. When the knob is in the first state, it is connected to the valve stem, and rotating the knob can control the fuel supply of the power fuel system. When the knob is in the second state, it is disengaged from the valve stem, and regardless of how the knob rotates, it cannot control the valve stem, thus preventing control of the fuel supply. As can be seen from the above example, the switching valve provided in this application, with its movable connection between the knob and valve stem, allowing the knob to switch between a first and a second state, avoids the adverse effects of engine and rotor vibrations on the switching valve, solves the problem of vibration causing the fuel system's switching valve to automatically close, and ensures the normal fuel supply of the power fuel system.

[0022] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the switching valve provided in an embodiment of this application;

[0025] Figure 2 An exploded view of the switching valve provided in an embodiment of this application;

[0026] Figure 3 A top view of the switching valve provided in an embodiment of this application;

[0027] Figure 4 Provided for the embodiments of this application Figure 3 Cross-sectional view of AA in the middle;

[0028] Figure 5 Provided for the embodiments of this application Figure 4 A magnified view of a section at point B in the middle.

[0029] Among them, 100 is the on / off valve, 10 is the valve body, 20 is the valve stem, 30 is the knob, 40 is the fastener, 50 is the reset elastic element, and 60 is the adapter.

[0030] 11 is a groove;

[0031] 21 is a threaded hole, and 22 is a flow hole;

[0032] 31 is a sinkhole, and 32 is a protrusion. Detailed Implementation

[0033] The core of this application is to provide a switching valve to solve the problem of automatic closure of the switching valve in the fuel system caused by vibration.

[0034] Another core aspect of this application is to provide a power fuel system having the aforementioned switching valve.

[0035] Another core aspect of this application is to provide an aircraft with the aforementioned power fuel system.

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In related fields, during the operation or research and development testing of unmanned helicopters and other aircraft, the engine and rotor will inevitably vibrate. However, this vibration will cause the fuel system's switching valve to automatically close, preventing the fuel system from supplying fuel normally, causing the engine to stop, and thus causing the aircraft to crash.

[0038] Therefore, such as Figure 1 As shown in the figure, this application discloses a switching valve 100, including a valve body 10, a valve stem 20, and a knob 30. The knob 30 is movably connected to the valve stem 20, so that the knob 30 can switch between a first state and a second state. This avoids the adverse effects of vibrations generated by the engine and rotor on the switching valve 100, solves the problem of vibration causing the switching valve 100 of the fuel system to automatically close, and ensures the normal fuel supply of the power fuel system.

[0039] The following will combine Figures 1 to 5 The switching valve disclosed in the embodiments of this application will be explained and described in detail.

[0040] Among them, such as Figure 1 and Figure 2 As shown, the valve body 10 can be installed on the fuel supply line of the power fuel system, thereby enabling the power fuel system to supply fuel to the aircraft's power components through the valve body 10. Furthermore, the valve stem 20 can be located within the valve body 10 to control the fuel supply of the power fuel system. Simultaneously, the knob 30 has a first state and a second state, and the knob 30 can be movably connected to the valve stem 20, allowing the knob 30 to switch between the first and second states. When the knob 30 is in the first state, the knob 30 is connected to the valve stem 20, and the knob 30 can drive the valve stem 20 to rotate, thereby controlling the fuel supply of the power fuel system. When the knob 30 is in the second state, the knob 30 is disengaged from the valve stem 20. In this state, no matter how the knob 30 rotates, it cannot control the rotation of the valve stem 20, i.e., it cannot control the fuel supply of the power fuel system. This avoids the adverse effects of engine and rotor vibration on the switching valve 100, solving the problem of vibration causing the switching valve 100 of the fuel system to automatically close.

[0041] The switching valve 100 disclosed in this application is installed on the fuel supply line of the power fuel system via a valve body 10, with the valve stem 20 located inside the valve body 10 to control the fuel supply of the power fuel system. Simultaneously, a knob 30 is movably connected to the valve stem 20, allowing the knob 30 to switch between a first state and a second state. When the knob 30 is in the first state, it is connected to the valve stem 20, and the knob 30 can rotate the valve stem 20 to control the fuel supply of the power fuel system. When the knob 30 is in the second state, it is disengaged from the valve stem 20, and regardless of how the knob 30 rotates, it cannot control the rotation of the valve stem 20, i.e., it cannot control the fuel supply of the power fuel system.

[0042] The switching valve 100 disclosed in this application embodiment is movably connected to the valve stem 20 via a knob 30, so that the knob 30 can switch between a first state and a second state. This avoids the adverse effects of vibration generated by the engine and rotor on the switching valve 100, solves the problem of vibration causing the switching valve 100 of the fuel system to automatically close, and ensures the normal fuel supply of the power fuel system.

[0043] like Figure 3 and Figure 4 As shown, the knob 30 can be connected to the valve stem 20 via fasteners 40 such as bolts, and the knob 30 can move along the fasteners 40 toward or away from the valve stem 20 to switch the knob 30 between a first state and a second state.

[0044] In some embodiments, such as Figure 5 As shown, the valve stem 20 may be provided with a threaded hole 21 that mates with the fastener 40, and the knob 30 may be provided with a through hole, which may be a smooth hole, so that the fastener 40 can pass through the through hole and be fixed in the threaded hole 21 of the valve stem 20. At the same time, in order to fix the knob 30, a countersunk groove 31 communicating with the through hole may be provided on the end face of the knob 30, and the inner diameter of the countersunk groove 31 may not be less than the outer diameter of the fastener 40, and the inner diameter of the through hole must be less than the outer diameter of the head of the fastener 40, so as to ensure that the head of the fastener 40 can be engaged in the countersunk groove 31, thereby realizing the connection between the knob 30 and the valve stem 20.

[0045] In some embodiments, such as Figure 5As shown, in order to enable the knob 30 to quickly disengage from the valve stem 20, a reset elastic element 50 can be sleeved on the outside of the fastener 40. At the same time, a receiving cavity is formed in the knob 30 to accommodate the reset elastic element 50. One end of the reset elastic element 50 abuts against the end face of the receiving cavity of the knob 30, and the other end of the reset elastic element 50 abuts against the valve stem 20. When it is necessary to control the fuel supply of the power system, the knob 30 can be pressed. At this time, the knob 30 overcomes the elastic force of the reset elastic element 50 and connects to the valve stem 20. Simultaneously, rotating the knob 30 drives the valve stem 20 to rotate, thereby controlling the fuel supply of the power system. When it is not necessary to control the fuel supply of the power system, simply release the knob 30. The knob 30 quickly disengages from the valve stem 20 under the elastic force of the reset elastic element 50. At this time, no matter how the knob 30 rotates, it cannot control the rotation of the valve stem 20, i.e., it cannot control the fuel supply of the power system. This avoids the adverse effects of engine and rotor vibration on the switching valve 100, solves the problem of vibration causing the switching valve 100 to automatically close, and ensures the normal fuel supply of the power system. It should be noted that the reset elastic element 50 can be a compression spring or other elastic element.

[0046] like Figure 5 As shown, the valve stem 20 has two opposite ends, which are defined as the first end and the second end for ease of understanding. The first end of the valve stem 20 may be provided with a flow hole 22 for fuel to flow through the power fuel system. When the flow hole 22 of the valve stem 20 is perpendicular to the fuel supply line, fuel can flow through the flow hole 22 at the first end of the valve stem 20 via the fuel supply line; when the flow hole 22 of the valve stem 20 is parallel to the fuel supply line, fuel cannot flow through the flow hole 22 at the first end of the valve stem 20. The second end of the valve stem 20 can be engaged with a knob 30 via a convex-concave fit, so that the knob 30 drives the valve stem 20 to rotate, thereby switching the flow hole 22 of the valve stem 20 between the direction perpendicular to the fuel supply line and the direction parallel to the fuel supply line.

[0047] In some embodiments, such as Figure 2 and Figure 5As shown, the first end of the valve stem 20 may be provided with a ball head, and the flow hole 22 is provided through the ball head to realize the opening and closing of the oil supply line by rotating the valve stem 20. Furthermore, a first concave surface and a first convex surface are provided at intervals along the circumferential direction on the end face of the second end of the valve stem 20. At the same time, a second convex surface that mates with the first concave surface on the end face of the second end of the valve stem 20 and a second concave surface that mates with the first convex surface on the end face of the second end of the valve stem 20 are provided at intervals along the circumferential direction on the inner wall end face of the knob 30 near the second end of the valve stem 20. When the knob 30 is pressed, it overcomes the elastic force of the reset elastic element 50. The second convex and second concave surfaces of the knob 30 are inserted into the first concave and first convex surfaces of the valve stem 20, respectively. At the same time, the valve stem 20 can be rotated by rotating the knob 30, thereby controlling the fuel supply of the power fuel system. When it is not necessary to control the fuel supply of the power fuel system, simply release the knob 30. Under the elastic force of the reset elastic element 50, the second convex and second concave surfaces of the knob 30 can quickly disengage from the first concave and first convex surfaces of the valve stem 20, respectively. At this time, no matter how the knob 30 is rotated, it cannot control the rotation of the valve stem 20, that is, it cannot control the fuel supply of the power fuel system.

[0048] In some embodiments, such as Figure 2 and Figure 5 As shown, the valve body 10 may be provided with a groove 11 that cooperates with the knob 30. At the same time, the end face of the knob 30 is provided with a protrusion 32 that can move in the groove 11, so that the protrusion 32 of the knob 30 can move circumferentially in the groove 11. That is, when the position of the protrusion 32 and the groove 11 is 0°, the oil supply line is fully open. When the position of the protrusion 32 and the groove 11 is 90°, the oil supply line is fully closed. This can prevent the valve stem 20 from being incompletely open or not closed tightly.

[0049] like Figures 1 to 5 As shown, the switching valve 100 may also include an adapter 60, which can be connected to the outlet end of the valve body 10 and to the fuel outlet hose of the power fuel system. Meanwhile, the inlet end of the valve body 10 can be connected to the fuel inlet hose of the power fuel system, thereby enabling the power fuel system to supply fuel to the aircraft's power components through the switching valve 100.

[0050] The switching valve 100 disclosed in this application has a simple structure, is easy to disassemble and assemble, is easy to process, and has a low cost. It can effectively avoid the adverse effects of vibration generated by the engine and rotor on the switching valve 100, solve the problem of vibration causing the switching valve 100 of the power fuel system to automatically close, and ensure the normal fuel supply of the power fuel system.

[0051] This application also discloses a power fuel system, including the switching valve 100 disclosed in the above embodiments. Therefore, the power fuel system has all the technical effects of the switching valve 100, which will not be repeated here.

[0052] This application also discloses an aircraft, including the power and fuel system disclosed in the above embodiments. Therefore, the aircraft has all the technical effects of the above power and fuel system, which will not be repeated here.

[0053] The terms "first" and "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may include steps or units not listed, but rather not listed.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A switching valve, characterized in that, include: Valve body (10) is used to be installed on the fuel supply line of the power fuel system; A valve stem (20) is located inside the valve body (10) and is used to control the fuel supply of the power fuel system. A knob (30) has a first state and a second state. In the first state, the knob (30) is connected to the valve stem (20) and the knob (30) can drive the valve stem (20) to rotate to control the fuel supply of the power fuel system. In the second state, the knob (30) is disengaged from the valve stem (20) and the knob (30) is movably connected to the valve stem (20) so that the knob (30) can switch between the first state and the second state.

2. The switching valve according to claim 1, characterized in that, The knob (30) is connected to the valve stem (20) via a fastener (40), and the knob (30) can move along the fastener (40) toward or away from the valve stem (20) to switch the knob (30) between the first state and the second state.

3. The switching valve according to claim 2, characterized in that, The fastener (40) is fitted with a reset elastic element (50) on its outer side, and one end of the reset elastic element (50) abuts against the knob (30), while the other end of the reset elastic element (50) abuts against the valve stem (20).

4. The switching valve according to claim 2, characterized in that, The valve stem (20) is provided with a threaded hole (21) that mates with the fastener (40).

5. The switching valve according to claim 2, characterized in that, The knob (30) is provided with a groove (31) for accommodating the fastener (40).

6. The switching valve according to claim 1, characterized in that, The valve stem (20) has a first end and a second end that are arranged opposite to each other. The first end of the valve stem (20) is provided with a flow hole (22) for fuel to flow through the power fuel system. The second end of the valve stem (20) is used to engage with the knob (30) through a concave-convex fit, so that the knob (30) drives the flow hole (22) of the valve stem (20) to switch between a direction perpendicular to the fuel supply line and a direction parallel to the fuel supply line.

7. The switching valve according to claim 1, characterized in that, The valve body (10) is provided with a groove (11) for cooperating with the knob (30), and the end face of the knob (30) is provided with a protrusion (32) that can move in the groove (11) so that the protrusion (32) of the knob (30) can move circumferentially in the groove (11).

8. The switching valve according to any one of claims 1 to 7, characterized in that, It also includes an adapter (60) connected to one end of the valve body (10), the other end of the valve body (10) being used to connect to the fuel inlet hose of the power fuel system, and the adapter (60) being used to connect to the fuel outlet hose of the power fuel system.

9. A power fuel system, characterized in that, Includes the switching valve (100) as described in any one of claims 1 to 8.

10. An aircraft, characterized in that, Including the power fuel system as described in claim 9.

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