Automatic control device for fuel inlet quantity of fuel power equipment

Abstract

The invention discloses an automatic control device for the fuel inlet quantity of fuel power equipment. The device comprises a piston flowmeter, an oil cup and a control base, the control base is arranged above the oil cup; the piston flowmeter is communicated with an external oil tank through an oil inlet pipe; the oil cup is communicated with an external engine through an oil return pipe; a base cavity is formed in the control base, is communicated with the piston flowmeter and the oil cup, and is communicated with the engine through an oil outlet pipe. The device further comprises an oil inlet control valve and an oil return control valve element, the oil inlet control valve is used for controlling the oil inlet amount passing through the piston flowmeter, and the oil return control valve element is used for controlling the oil return amount entering the base cavity from the oil cup. The mechanical structure is completely adopted, the structure is ingenious, and the safety coefficient is high. The piston flow meter can accurately meter and monitor the actual fuel quantity provided for the engine by the oil inlet pipe, and fully automatically control the oil inlet and return usage amount.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel-powered equipment, and particularly to an automatic control device for the fuel intake of fuel-powered equipment. Background Art

[0002] Fuel-powered equipment is an extremely important tool in the current oil and gas drilling production process. In traditional fuel-powered equipment, an oil pump pumps fuel out of the fuel tank, delivers it to the engine through a flow meter, and the unused fuel returns to the fuel tank through a return pipe for reuse. Therefore, the fuel intake measured by the flow meter is not the actual fuel consumption of the engine. Thus, it is difficult to grasp the accuracy of fuel intake during the use of fuel-powered equipment, which brings many difficulties to the refined management of equipment by oil drilling and production enterprises. In addition, fuel is extremely likely to mix with air in the return pipe during the return process, resulting in difficult engine starting or frequent stalling during operation. Summary of the Invention

[0003] In view of the above problems, the purpose of the present invention is to provide an automatic control device for the fuel intake of fuel-powered equipment.

[0004] In a first aspect, an embodiment of the present invention provides an automatic control device for the fuel intake of fuel-powered equipment, including:

[0005] A piston flow meter, an oil cup, and a control base;

[0006] The control base is disposed above the oil cup; the piston flow meter is used to communicate with an external fuel tank through an inlet pipe;

[0007] The oil cup is used to communicate with an external engine through a return pipe;

[0008] A base cavity is provided inside the control base, the base cavity communicates with the piston flow meter and the oil cup, and the base cavity communicates with the engine through an outlet pipe.

[0009] In one embodiment, an inlet oil port is provided in the base cavity, which communicates with the outlet oil port provided in the piston flow meter;

[0010] An inlet oil port for the return oil is provided in the base cavity, which communicates with the oil cup.

[0011] In one embodiment, the device further includes: an inlet oil control valve and a return oil control valve core; the inlet oil control valve and the return oil control valve core are disposed inside the base cavity;

[0012] The inlet oil control valve is disposed at the inlet oil port of the cavity, and the return oil control valve core is disposed above the inlet oil port for the return oil;

[0013] The inlet oil control valve is lapped on the oil return control valve core so that the upward movement of the oil return control valve core drives the upward movement of the inlet oil control valve;

[0014] The inlet oil control valve is used to control the inlet oil volume passing through the piston flowmeter, and the oil return control valve core is used to control the oil return volume entering the base cavity from the oil cup.

[0015] In one embodiment, the device further includes: an oil return control spring and an oil return control guide rod; the oil return control spring and the oil return control guide rod are arranged in the base cavity;

[0016] The oil return control spring is located in the reserved hole opened on the oil return control valve core;

[0017] The bottom end of the oil return control spring is fixedly connected to the oil return control valve core; the top end of the oil return control spring is embedded in the oil return control guide rod and fixedly connected to the oil return control guide rod.

[0018] In one embodiment, the device further includes: a float sleeve rod and a plug;

[0019] The float sleeve rod is hollow inside, the upper end is arranged in the oil return inlet of the cavity, the lower end extends into the oil cup, and an oil return suction port is also opened on the outer wall of the float sleeve rod. The bottom of the float sleeve rod is fixedly connected to the plug.

[0020] In one embodiment, the float sleeve rod further includes: a thimble;

[0021] The thimble is arranged in the float sleeve rod. The upper end of the thimble is fixedly connected to the bottom end of the oil return control valve, and the bottom end of the thimble is fixedly connected to the plug.

[0022] In one embodiment, the float sleeve rod further includes: a float and a retaining ring;

[0023] The float is in a ring structure, sleeved outside the float sleeve rod, and is located higher than the oil return suction port;

[0024] The retaining ring is sleeved outside the float sleeve rod and is fixedly connected to the upper and lower ends of the float respectively, and is used to limit the sliding of the float on the float sleeve rod.

[0025] In one embodiment, an exhaust hole is further provided at the lower end of the control base for exhausting the air mixed into the oil cup from the oil return pipe.

[0026] In one embodiment, the control base is installed in the reserved hole of the oil cup body and is fixedly connected to the oil cup.

[0027] In a second aspect, an embodiment of the present invention provides a method for controlling the fuel intake of a fuel-powered device by using an automatic fuel intake control device for a fuel-powered device as described above.

[0028] The beneficial effects of the above technical solution provided by the embodiment of the present invention at least include:

[0029] For the automatic fuel intake control device for a fuel-powered device provided by the embodiment of the present invention, a part of the fuel amount entering the piston flowmeter through the fuel inlet pipe directly enters the engine through the base cavity and is consumed, and the rest enters the oil cup through the return pipe, and then enters the engine again through the base cavity for use. Therefore, the piston flowmeter can accurately measure and monitor the actual fuel amount supplied to the engine by the fuel inlet pipe, laying a foundation for accurately controlling the fuel intake of the power device.

[0030] Furthermore, an oil inlet control valve and a return oil control valve core are arranged in the base cavity. The connection between the oil inlet control valve and the return oil control valve core is ingenious, and the fuel intake and return oil volume can be controlled and adjusted in real time, without the need to collect instantaneous flow data additionally to design a special structure or device for controlling the fuel intake. The fuel-powered devices are frequently used at the engineering site. The embodiment of the present invention is completely composed of mechanical mechanisms, which can effectively avoid the safety hazards caused by the traditional solenoid valve for controlling the fuel intake, and has a higher safety factor.

[0031] Furthermore, for the automatic fuel intake control device for a fuel-powered device provided by the embodiment of the present invention, once it enters the working state, the float sleeve rod (including the thimble, float and retaining ring), plug, return oil control spring, etc. in the oil cup will drive the oil inlet control valve and the return oil control valve core into a reciprocating motion. The real-time flow of the fuel intake and return oil volume is completely automatically controlled by the return oil liquid level in the oil cup, realizing automation without external electric energy or other energy consumption.

[0032] Furthermore, the position of the return oil suction port on the float sleeve rod is lower than the height of the float and is as close as possible to the bottom end of the float sleeve rod, so as to ensure that when the float sleeve rod and the connected components move up and down, air mixed in the oil cup is not sucked in, preventing a large amount of air from entering the base cavity through the cavity return oil inlet and then entering the engine, and avoiding difficulties in starting the engine or frequent stalling during operation. At the same time, by controlling the exhaust hole provided at the lower end of the base, the air escaping from the return oil liquid level of the oil cup can be discharged in time, ensuring the pressure balance in the oil cup and each fuel pipeline communicating with it.

[0033] Furthermore, compared with the traditional working mode of only supplying fuel to the engine by a fuel pump, in the embodiment of the present invention, the return oil does not directly enter the engine, but enters the engine through the oil cup and the cavity base. Therefore, components related to the return oil such as the oil cup and the float sleeve rod (including the thimble, float and retaining ring) undertake part of the work that originally belonged to the fuel pump, reducing the fuel pumping volume during the working process to a certain extent and increasing the service life of the fuel pump.

[0034] Other features and advantages of the present invention will be set forth in the following description, and in part will be obvious from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the structure particularly pointed out in the written description, claims, as well as the drawings.

[0035] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0036] The drawings are provided to further understand the present invention, and constitute a part of the description. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0037] Figure 1 is the external view of the automatic fuel intake control device for a fuel-powered device in an embodiment of the present invention;

[0038] Figure 2 is the schematic structural view of the automatic fuel intake control device for a fuel-powered device in an embodiment of the present invention;

[0039] Figure 3a is the schematic view of a part of the pipeline of the automatic fuel intake control device for a fuel-powered device in an embodiment of the present invention (return oil pipe, oil outlet pipe);

[0040] Figure 3b is the schematic view of a part of the pipeline of the automatic fuel intake control device for a fuel-powered device in an embodiment of the present invention (fuel inlet pipe, exhaust pipe).

[0041] Description of the Reference Numerals:

[0042] 1 - Piston flowmeter 2 - Oil cup 3 - Control base 4 - Fuel inlet pipe 5 - Return oil pipe 6 - Oil outlet pipe;

[0043] 7 - Base cavity 8 - Cavity oil inlet 9 - Cavity return oil inlet 10 - Oil inlet control valve 11 - Return oil control valve core 12 - Return oil control spring;

[0044] 13 - Float sleeve rod 14 - Return oil suction inlet 15 - Plug 16 - Thumb pin 17 - Float 18 - Retaining ring 19 - Exhaust pipe. Detailed Embodiments

[0045] This embodiment provides an automatic fuel intake control device for a fuel-powered device. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0046] Referring to Figure 1 、 Figure 2 、 Figure 3a and Figure 3b as shown, the automatic fuel intake control device in the embodiment of the present invention includes:

[0047] a piston flowmeter 1, an oil cup 2 and a control base 3;

[0048] The control base 3 is arranged above the oil cup 2; the piston flowmeter 1 is used to communicate with an external fuel tank through an oil inlet pipe 4;

[0049] The oil cup 2 is used to communicate with an external engine through an oil return pipe 5;

[0050] A base cavity 7 is arranged inside the control base 3, the base cavity 7 communicates with the piston flowmeter 1 and the oil cup 2, and the base cavity 7 communicates with the engine through an oil outlet pipe 6.

[0051] For example, the piston flowmeter 1 can measure and monitor the fuel intake entering the piston flowmeter 1 through the oil inlet pipe 4, the oil cup 2 can absorb the oil return entering the oil cup 2 through the oil return pipe 5, and both the fuel intake flowing through the piston flowmeter 1 and the oil return flowing through the oil cup 2 can enter the base cavity 7 inside the control base 3 and be supplied to the engine through the oil outlet pipe 6.

[0052] In one embodiment, a cavity oil inlet 8 is provided in the base cavity 7 inside the control base 3, which communicates with the oil outlet provided on the piston flowmeter 1; a cavity oil return inlet 9 is provided in the base cavity 7, which communicates with the oil cup 2.

[0053] In one embodiment, the device provided in the embodiment of the present invention further includes an oil inlet control valve 10 and an oil return control valve core 11; the oil inlet control valve 10 and the oil return control valve core 11 are arranged in the base cavity 7; the oil inlet control valve 10 is arranged at the cavity oil inlet 8, and the oil return control valve core 11 is arranged above the cavity oil return inlet 9; the oil inlet control valve 10 is lapped on the oil return control valve core 11 so that the upward movement of the oil return control valve core 11 drives the upward movement of the oil inlet control valve 10; the oil inlet control valve 10 is used to control the fuel intake passing through the piston flowmeter 1, and the oil return control valve core 11 is used to control the oil return entering the base cavity 7 from the oil cup 2.

[0054] For example: Referring to Figure 2As shown, the oil inlet control valve 10 and the oil return control valve core 11 overlap and can move up and down simultaneously. When the oil return control valve core 11 completely blocks the oil return inlet 9 of the cavity, the oil inlet control valve 10 is in the maximum open state; as the oil return control valve core 11 gradually moves upward, the oil inlet control valve 10 will gradually close. When the oil return control valve core 11 moves downward, the oil inlet control valve 10 will also gradually expand its open state. Therefore, the combined movement of the oil inlet control valve 10 and the oil return control valve core 11 can control the oil inlet volume through the oil inlet 8 of the cavity and the oil return volume through the oil return inlet 9 of the cavity.

[0055] In one embodiment, the device provided by the embodiment of the present invention further includes: an oil return control spring 12 and an oil return control guide rod; the oil return control spring 12 and the oil return control guide rod are arranged in the base cavity 7;

[0056] The oil return control spring 12 is located in the reserved hole opened in the oil return control valve core 11; the bottom end of the oil return control spring 12 is fixedly connected to the oil return control valve core 11; the top end of the oil return control spring 12 is embedded in the oil return control guide rod and fixedly connected to the oil return control guide rod.

[0057] For example: Refer to Figure 2 As shown, the oil return control spring 12 exerts a return force on the oil return control valve core 11 to prompt the oil return control valve core 11 to move downward. When the oil return control spring 12 moves up and down with the oil return control valve core 11, the oil return control spring 12 compresses and rebounds accordingly. To ensure that the oil return control spring 12 plays its role to the greatest extent, it is necessary to avoid its left and right swing. Therefore, an oil return control guide rod (not shown in the figure) to ensure its vertical movement and a reserved hole in the oil return control valve core 11 are designed.

[0058] In one embodiment, the device provided by the embodiment of the present invention further includes: a float sleeve rod 13 and a plug 15;

[0059] The float sleeve rod 13 is hollow inside, the upper end is arranged in the oil return inlet 9 of the cavity, the lower end extends into the oil cup 2, and an oil return suction port 14 is also opened on the outer wall of the float sleeve rod 13. The bottom of the float sleeve rod 13 is fixedly connected to the plug 15.

[0060] In one embodiment, the float sleeve rod 13 further includes a thimble 16; the thimble 16 is arranged in the float sleeve rod 13, the upper end of the thimble 16 is fixedly connected to the bottom end of the oil return control valve core 11, and the bottom end of the thimble 16 is fixedly connected to the plug 15.

[0061] In one embodiment, the float sleeve rod 13 further includes a float 17 and a retaining ring 18; the float 17 is in a ring structure, sleeved outside the float sleeve rod 13, and is located higher than the position of the oil return suction port 14; the retaining ring 18 is sleeved outside the float sleeve rod 13 and is fixedly connected to the upper and lower ends of the float 17 respectively, for restricting the float 17 from sliding on the float sleeve rod 13.

[0062] For example: Refer to Figure 2 As shown, the float sleeve rod 13 serves as a connecting mechanism for the return oil to enter the base cavity 7 from the oil cup 2. The return oil enters the float sleeve rod 13 through the return oil suction port 14, gradually rises under the action of negative pressure, and then enters the base cavity 7 through the cavity return oil inlet 9.

[0063] When the liquid level of the return oil in the oil cup 2 rises above the height of the float 17, the float 17 will drive the float sleeve rod 13 to move upward under the action of buoyancy. When the liquid level of the return oil drops below the height of the float 17, the buoyancy force on the float 17 gradually decreases, and it will also drive the float sleeve rod 13 to move downward. Since the ejector pin 16 is indirectly connected to the float sleeve rod 13 through the plug 15, and the upper end of the ejector pin 16 is fixedly connected to the return oil control valve core 11, the ejector pin 16, the float sleeve rod 13, and the return oil control valve core 11 move up and down together with the change of the liquid level height of the return oil in the oil cup 2. In addition, as mentioned above, due to the setting of the return oil control spring 12, when the return oil in the oil cup 2 decreases, it functions to accelerate the downward movement of the return oil control spring 12.

[0064] In one embodiment, an exhaust hole 19 is further provided at the lower end of the control base 3 for discharging the air mixed into the oil cup 2 through the return oil pipe 5.

[0065] For example: Refer to Figure 2 、 Figure 3a and Figure 3b As shown, it is very easy for air to invade during the process of the return oil entering the oil cup 2 through the return oil pipe 5. When the air in the oil cup 2 gradually increases, its internal pressure will also gradually increase, and the pressure balance of the internal and external pipelines of the oil cup 2 may be broken during long-term operation. To avoid this adverse effect, an exhaust hole (not shown in the figure) is provided at the lower end position of the control base 3 above the oil cup body. The air mixed into the oil cup 2 enters the exhaust pipe 19 through the exhaust hole and escapes.

[0066] In one embodiment, the control base 3 is installed in the reserved hole of the oil cup 2 body and fixedly connected to the oil cup 2.

[0067] From the above introduction to the device provided by the embodiments of the present invention, it can be seen that when the device in the embodiments of the present invention is working, the movement states of its internal structures or mechanisms, including the float sleeve rod (including the ejector pin, the float, and the retaining ring), the plug, the return oil control spring, the fuel inlet control valve, and the return oil control valve core, are cyclic dynamic processes. The working states and processes of the fuel power equipment fuel inlet automatic control device in the embodiments of the present invention will be illustrated by examples below.

[0068] For example: For the device provided by the embodiments of the present invention, the device is sequentially divided into four working states according to the working process of the device, namely State I, State II, State III, State IV, and State V.

[0069] In state I: The fuel supply amount of the engine is completely provided by the fuel inflow in the inlet pipe. The inlet control valve is in the maximum open state. There is no or little oil return in the oil cup, and the oil return control valve core completely blocks the oil return inlet of the cavity. At this time, fuel enters the piston flowmeter from the external fuel tank through the inlet pipe, passes through the outlet of the piston flowmeter and the oil inlet of the cavity, that is, enters the base cavity through the oil inlet of the cavity, and directly enters the engine through the outlet pipe. At this time, the fuel source in the outlet pipe is all provided by the inlet pipe.

[0070] In state II: When the fuel passes through the engine, the oil return enters the oil cup through the oil return pipe. The oil return liquid level in the oil cup gradually rises. The float moves upward under the buoyancy of the oil return. Since the float is sleeved on the float sleeve rod and fixed together by two retaining rings at the upper and lower ends, the float sleeve rod will move upward with the float. Since the thimble is fixedly connected to the float sleeve rod through a plug, the thimble will also move upward with the float and the float sleeve rod, and the oil return control spring is in a compressed state. The upward movement of the thimble will push the oil return control valve core fixedly connected to it upward. Then the oil return inlet of the cavity will be opened. The oil return in the oil cup enters the float sleeve rod through the oil return suction port, enters the base cavity through the oil return inlet of the cavity, and then enters the engine through the outlet pipe. Because the inlet control valve is lapped on the oil return control valve core, the inlet control valve will move gradually toward the outlet of the piston flowmeter with the movement of the oil return control valve core, resulting in a gradual decrease in the outlet of the piston flowmeter. Under the regulation of the inlet control valve, the fuel inflow in the inlet pipe gradually decreases. In summary, at this time, the fuel source in the outlet pipe is provided by the inlet pipe and the oil cup.

[0071] In state III, when the oil return amount in the oil cup is increasing and the float rises to the highest limit, the oil return control valve core and the inlet control valve lapped with it also rise to their respective highest limits at the same time. The gasket in the inlet control valve completely blocks the outlet of the piston flowmeter, that is, the inlet pipe is closed. At this time, the fuel source in the outlet pipe is all provided by the oil cup.

[0072] In state IV, when the oil return liquid level in the oil cup gradually decreases due to the gradual decrease of the oil return amount, the buoyancy force on the float gradually decreases. When the buoyancy force is less than the resultant force between the gravity of the float sleeve rod, the thimble and the oil return control valve core and the return spring force of the oil return control spring (the gravity of the float, the oil return control spring and the plug is ignored), the oil return control valve core will gradually move downward, resulting in a decrease in the opening degree of the oil return inlet of the cavity, and the inlet control valve gradually opens. The fuel in the inlet pipe can continue to enter the base cavity through the piston flowmeter. At this time, the fuel source in the outlet pipe is provided by the inlet pipe and the oil cup, which is the same as state II.

[0073] In state V, when the oil return liquid level in the oil cup becomes lower and lower, and the buoyancy force on the float is not sufficient to drive the float sleeve rod connected thereto to move upward, the oil return control valve core gradually falls back to a position above the initial cavity oil return inlet, completely blocking the oil return inlet, and the corresponding oil inlet control valve is in the maximum open state. At this time, the fuel source in the oil outlet pipe is provided by the oil inlet pipe, and the device in the embodiment of the present invention returns to state I.

[0074] Once the device provided by the embodiment of the present invention enters the working state, it circulates in the order of the above five states. Among them, state I and state III may not occur, that is, the oil inlet control valve and the oil return control valve core are always in a semi-open and semi-closed state.

[0075] Based on the same inventive concept, the embodiment of the present invention also provides a method for controlling the fuel intake of a fuel-powered device by using the fuel intake automatic control device of the fuel-powered device. Since the principle of this method is similar to that of the aforementioned fuel intake automatic control device of the fuel-powered device, the implementation of this method can refer to the implementation of the aforementioned device and will not be elaborated here.

[0076] Obviously, those skilled in the art can make various changes to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes.

Claims

1. An automatic fuel intake control device for a fuel-powered device, characterized in that, it includes: a piston flowmeter, an oil cup, and a control base; the control base is arranged above the oil cup; the piston flowmeter is used to communicate with an external fuel tank through an inlet pipe; the oil cup is used to communicate with an external engine through a return pipe; a base cavity is arranged inside the control base, the base cavity communicates with the piston flowmeter and the oil cup, and the base cavity communicates with the engine through an outlet pipe.

2. The device according to claim 1, characterized in that, the base cavity is provided with a cavity inlet for oil, which communicates with the oil outlet opened by the piston flowmeter; the base cavity is provided with a cavity return inlet for oil, which communicates with the oil cup.

3. The device according to claim 2, characterized in that, it further includes: an inlet control valve and a return control valve core; the inlet control valve and the return control valve core are arranged inside the base cavity; the inlet control valve is arranged at the cavity inlet for oil, and the return control valve core is arranged above the cavity return inlet for oil; the inlet control valve is lapped on the return control valve core so that the upward movement of the return control valve core drives the upward movement of the inlet control valve; the inlet control valve is used to control the fuel intake through the piston flowmeter, and the return control valve core is used to control the return oil volume entering the base cavity from the oil cup.

4. The device according to claim 3, characterized in that, it further includes: a return control spring and a return control guide rod; the return control spring and the return control guide rod are arranged inside the base cavity; the return control spring is located in a reserved hole opened by the return control valve core; the bottom end of the return control spring is fixedly connected to the return control valve core; the top end of the return control spring is embedded in the return control guide rod and fixedly connected to the return control guide rod.

5. The device according to claim 1, characterized in that, the device further includes: a float sleeve rod and a plug; the inside of the float sleeve rod is hollow, the upper end is arranged inside the cavity return inlet for oil, the lower end extends into the oil cup, and an oil return suction port is also opened on the outer wall of the float sleeve rod, and the bottom of the float sleeve rod is fixedly connected to the plug.

6. The device according to claim 5, characterized in that, the float sleeve rod further includes: a thimble; the thimble is arranged in the float sleeve rod, the upper end of the thimble is fixedly connected to the bottom end of the return control valve, and the bottom end of the thimble is fixedly connected to the plug.

7. The device according to claim 5, characterized in that, the float sleeve rod further includes: a float and a retaining ring; the float is in a ring structure, sleeved outside the float sleeve rod, and its position is higher than the position of the oil return suction port; the retaining ring is sleeved outside the float sleeve rod and fixedly connected to the upper and lower ends of the float respectively, and is used to limit the sliding of the float on the float sleeve rod.

8. The device according to any one of claims 1-7, characterized in that, an exhaust hole is further arranged at the lower end of the control base, which is used to discharge the air mixed into the oil cup from the return pipe.

9. The device according to any one of claims 1-7, characterized in that, The control base is installed in the reserved hole of the oil cup body and fixedly connected to the oil cup.

10. A method for controlling the fuel intake of a fuel-powered device by using the automatic fuel intake control device for a fuel-powered device according to any one of claims 1-9.

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