Fuel oil control valve with safety device

Abstract

The utility model provides a fuel oil control valve with a safety device, and relates to the technical field of control valves. The valve rod is installed in the transverse channel of the valve body in a matched and sliding mode, the valve rod is rotatably arranged, an input hole and a first output hole are formed in the valve rod, and the first output hole is arranged in a fan shape; an input channel is formed in the upper portion of the valve body, the input hole is communicated with the input channel, and a first transmission channel is further formed in the valve body and communicated with the input channel. According to the technical scheme, accurate regulation and control of the valve rod capable of transversely moving and rotating are achieved through the rotary knob, the worm, the worm gear and the square rod, fuel oil is output through the input hole and the first output hole under normal pressure, and the flow is adjustable; when the hydraulic pressure of the system rises abnormally, the valve rod or the plug overcomes the tension of the reset spring to transversely move, the first pressure relief channel and the second pressure relief channel are opened, pressure is relieved in time, and the safety of the system is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and in particular to a fuel control valve with a safety device. Background Technology

[0002] A fuel control valve is a key component used to precisely regulate the fuel supply to an engine, widely used in automotive, aerospace, marine, and industrial power systems. It primarily receives signals from an electronic control unit or mechanical system and dynamically adjusts fuel flow and injection pressure based on real-time operating conditions such as engine load, speed, and temperature, ensuring efficient, stable, and low-emission combustion. Fuel control valves typically employ high-precision sealing designs and fast-response actuators, possessing high-temperature resistance, corrosion resistance, and pollution resistance. They effectively improve engine power, fuel economy, and environmental friendliness, and are one of the crucial core technologies for achieving high-efficiency operation of modern internal combustion engines.

[0003] Traditional fuel control valves lack independent pressure control devices and typically rely on changing the size of the output port to regulate fuel flow. However, in actual use, when system demand changes or oil circuit resistance fluctuates, the single adjustment of the output port diameter cannot synchronously balance the oil pressure, which can easily lead to abnormal increases in local oil pressure. This can cause problems such as damage to seals, valve body cracking, or pressure overload of downstream equipment, which not only reduces the reliability and stability of system operation but also increases maintenance costs and downtime risks. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies that lack a pressure regulation structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a fuel control valve with a safety device, comprising a valve body and a valve stem, wherein the valve stem is slidably mounted inside a transverse channel of the valve body and is rotatably configured, wherein the valve stem has an input hole and a first output hole, the first output hole being fan-shaped, and when the valve stem rotates, a variable output end gap is formed between the first output hole and the inner wall of the valve body; an input channel is provided on the upper part of the valve body, the input hole communicating with the input channel, and a first transmission channel is also provided inside the valve body, the first transmission channel communicating with the input channel; when the pressure inside the input channel is too high, hydraulic pressure drives the valve stem to move laterally through the first transmission channel, and at this time, the input channel communicates with a first pressure relief channel provided on the lower part of the valve body.

[0006] In at least some embodiments, the lower part of the valve body has an output channel for connecting a load via a pipeline.

[0007] In at least some embodiments, the valve stem has a first annular groove communicating with the input channel and a second annular groove communicating with the first transmission channel; when the internal hydraulic pressure of the valve body is too high, the valve stem is driven to make a lateral movement through the first annular groove, and at this time, the first annular groove communicates with the input channel and connects the input channel and the first pressure relief channel.

[0008] In at least some embodiments, a hollow channel is provided inside the valve stem, and the input port and the first output port are respectively connected to the hollow channel. The valve stem is also provided with a second output port connected to the hollow channel. The second output port is connected to a second transmission channel opened in the valve body. The second transmission channel is connected to a second pressure relief channel opened in the upper part of the valve body. A plug slidably installed in the second pressure relief channel is movable to block the connection between the second pressure relief channel and the second transmission channel.

[0009] In at least some embodiments, a first screw and a second screw are screwed to one side of the valve body. A first return spring is fixedly installed between the first screw and the valve stem, and a second return spring is provided between the second screw and the plug. In use, when the hydraulic pressure initially increases, the valve stem moves laterally against the tension of the first return spring, and the first pressure relief channel is connected to the input channel. When the hydraulic pressure further increases, the plug moves laterally against the tension of the second return spring, and the second pressure relief channel is connected to the input channel, performing a staged pressure relief action.

[0010] In at least some embodiments, a drive assembly is provided on one side of the valve body. The drive assembly includes a knob rotatably mounted on the outside of the valve body, a worm gear rotatably mounted inside the valve body with one end passing through the valve body and fixedly connected to the knob, the worm gear also meshing with a worm wheel rotatably mounted inside the valve body, and a square rod fixedly connected to one side of the worm gear and slidably connected to the valve stem. Rotating the knob controls the valve stem to rotate.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] In this invention, the fuel flow rate can be precisely adjusted by rotating the valve stem under normal operating conditions to meet the fuel supply requirements under different operating conditions.

[0013] Meanwhile, when the internal hydraulic pressure of the system initially rises, the first pressure relief channel can be automatically opened by the lateral sliding of the valve stem to quickly release the initial overpressure and ensure the continued stable operation of the system; if the pressure rises further, the plug will slide under the action of hydraulic pressure to open the second pressure relief channel, thereby achieving a wider range of pressure relief and avoiding damage to the equipment caused by extreme overpressure.

[0014] By adjusting the initial tension of the first and second reset springs using the first and second screws, the pressure relief trigger pressure can be flexibly set, enhancing the system's adaptability.

[0015] In addition, the worm gear-worm wheel-square rod drive mechanism has a self-locking function, which can prevent the valve stem rotation position from accidentally deviating under high pressure conditions, further improving the stability, safety and reliability of the fuel control system, and making it suitable for complex fuel supply systems with high safety requirements. Attached Figure Description

[0016] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a fuel control valve with a safety device.

[0017] Figure 2 This utility model provides a three-dimensional structural diagram of the valve body cross-section in a fuel control valve with a safety device.

[0018] Figure 3 This utility model proposes a fuel control valve with a safety device. Figure 2 A three-dimensional structural diagram at point A in the middle;

[0019] Figure 4 This invention provides a three-dimensional structural diagram of the cross-sectional structure of the valve stem portion in a fuel control valve with a safety device.

[0020] Legend: 1. Valve body; 2. Drive assembly; 3. Input channel; 4. Output channel; 5. First pressure relief channel; 6. Second pressure relief channel; 7. Valve stem; 8. Plug; 9. First transmission channel; 10. Second transmission channel; 11. First screw; 12. Second screw;

[0021] 201. Knob; 202. Worm gear; 203. Worm wheel; 204. Square rod;

[0022] 701, First annular groove; 702, Second annular groove; 703, Input hole; 704, First output hole; 705, Second output hole; 706, Hollow channel. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] Example, according to Figures 1-4 ,like Figure 1 As shown in the figure, the present invention provides a fuel control valve with a safety device. By providing a rotatable and laterally sliding valve stem 7 in the valve body 1, and in combination with the input port 703, the first output port 704 and the pressure relief channel, the fuel flow regulation and automatic pressure relief protection functions are integrated.

[0026] The valve body 1 is included, as well as a valve stem 7. The valve stem 7 is slidably installed inside the transverse channel of the valve body 1 and is rotatable. An input channel 3 is provided on the upper part of the valve body 1. During normal operation, fuel enters through the input channel 3 on the upper part of the valve body 1 and flows into the valve stem 7 through the input hole 703 connected to it.

[0027] The valve stem 7 has an input hole 703 and a first output hole 704. The first output hole 704 is arranged in a fan shape. When the valve stem 7 rotates, a variable output end gap is formed between the first output hole 704 and the inner wall of the valve body 1. Depending on the rotation angle of the valve stem 7, different sizes of output end gaps are formed between the first output hole 704 and the inner wall of the valve body 1, thereby achieving precise adjustment of fuel flow.

[0028] The input port 703 is connected to the input channel 3. When the system oil pressure is within the normal range, the valve stem 7 maintains its initial position in the transverse channel. The fuel supply is controlled only by rotating the output port to adjust the opening. The valve body 1 also has a first transmission channel 9, which is connected to the input channel 3. When the pressure inside the input channel 3 is too high, the hydraulic pressure drives the valve stem 7 to move laterally through the first transmission channel 9. However, when the oil pressure inside the input channel 3 rises abnormally to above the set threshold, the excessive hydraulic pressure is transmitted along the first transmission channel 9 inside the valve body 1 and applied to a specific structural surface of the valve stem 7, driving the valve stem 7 to slide axially along the transverse channel. At this time, the input channel 3 is connected to the first pressure relief channel 5 located at the bottom of the valve body 1. Thus, the previously unconnected input channel 3 and the first pressure relief channel 5 located at the bottom of the valve body 1 are connected, forming a new pressure relief path. The excessive fuel pressure can be quickly released through the pressure relief channel, effectively avoiding the problem of valve body 1 being damaged, seal failure, or damage to downstream equipment due to abnormal oil pressure rise.

[0029] While the valve stem 7 achieves lateral displacement under hydraulic pressure, its rotation function is still retained, allowing the output end gap to be adjusted by rotation after the pressure returns to normal, thus achieving continuous flow control. Therefore, this device not only ensures the self-protection capability of the fuel system under abnormal high pressure, but also takes into account the high precision and flexibility of flow regulation under normal operating conditions, greatly improving the overall reliability, safety and applicability of the fuel control valve.

[0030] In this embodiment, the lower part of the valve body 1 is provided with an output channel 4, which is used to connect the load through a pipeline. The valve stem 7 is provided with a first annular groove 701 that communicates with the input channel 3 and a second annular groove 702 that communicates with the first transmission channel 9, forming a coordinated control structure.

[0031] Under normal operating conditions, fuel enters the valve stem 7 through the input port 703 via the input channel 3, and is then output to the load by the rotation of the valve stem 7. The flow rate is precisely controlled according to the rotation angle of the valve stem 7.

[0032] When the internal hydraulic pressure of valve body 1 is too high, the valve stem 7 is driven to move laterally through the first annular groove 701. At this time, the first annular groove 701 is connected to the input channel 3 and the first pressure relief channel 5. Specifically, when the system hydraulic pressure rises abnormally, the excessive hydraulic pressure acts directly on the second annular groove 702 through the input channel 3, generating sufficient axial thrust to drive the valve stem 7 to move along the lateral channel direction, causing the valve stem 7 to deviate from its initial position. At this time, under the guidance of the structural design, the first annular groove 701 is connected to the input channel 3 and the first pressure relief channel 5 set at the lower part of the valve body 1, thereby quickly forming a pressure relief path. The excessive hydraulic pressure can be directly discharged into the pressure relief channel and guided to a safe area, avoiding system damage caused by excessive oil pressure. The hydraulic pressure is effectively used to drive the system, realizing an adaptive pressure relief function without the need for external power assistance. At the same time, it takes into account the flow control under normal operating conditions and the overpressure protection under abnormal conditions, improving the safety and reliability of the entire fuel control system.

[0033] In this embodiment, the fuel control valve with staged pressure relief function has a hollow channel 706 inside the valve stem 7, through which the input port 703 and the first output port 704 are respectively connected to the hollow channel 706. At the same time, a second output port 705 is opened on the valve stem 7 and connected to the second pressure relief channel 6 on the upper part of the valve body 1 through the second transmission channel 10 connected to it, thus realizing the combined function of flow regulation and dual-stage pressure protection.

[0034] Specifically, a hollow channel 706 is provided inside the valve stem 7. The input port 703 and the first output port 704 are respectively connected to the hollow channel 706. Under normal operating conditions, fuel enters the hollow channel 706 from the input channel 3 through the input port 703. Then, according to the rotation state of the valve stem 7, it flows to the load end through the first output port 704. The flow rate is precisely controlled by adjusting the gap between the first output port 704 and the inner wall of the valve body 1. When the system hydraulic pressure initially increases, the pressure of the input channel 3 is transmitted through the first annular groove 701 and applied to the valve stem 7 laterally. After overcoming the tension of the first return spring, the valve stem 7 slides laterally, pushing the first annular groove 701 to connect with the first pressure relief channel 5 inside the valve body 1, thereby opening the first pressure relief passage, releasing some of the overpressured liquid in time, alleviating the risk caused by the initial overpressure of the system, and ensuring the continued stable operation of the system.

[0035] The valve stem 7 is also provided with a second output hole 705 that is connected to the hollow channel 706. The second output hole 705 is connected to the second transmission channel 10 opened in the valve body 1. The second transmission channel 10 is connected to the second pressure relief channel 6 opened on the upper part of the valve body 1. The plug 8, which is slidably installed in the second pressure relief channel 6, is movable to block the connection between the second pressure relief channel 6 and the second transmission channel 10. If the hydraulic pressure continues to rise, exceeds the pressure relief range set by the first return spring, and further reaches the second set pressure threshold, the hydraulic pressure continues to be transmitted along the second transmission channel 10 and acts on the plug 8, which is slidably installed in the second pressure relief channel 6. Under the action of the pressure thrust, the plug 8 overcomes the tension of the second return spring and moves axially, opening the connection between the second pressure relief channel 6 and the input channel 3, forming a second pressure relief path. At this time, more high-pressure liquid will be quickly discharged through the second pressure relief channel 6 to achieve a larger-scale pressure release and prevent the system from structural damage or sealing failure due to continuous overpressure. This is achieved through this staged pressure relief design.

[0036] A first screw 11 and a second screw 12 are screwed onto one side of the valve body 1. A first return spring is fixedly installed between the first screw 11 and the valve stem 7, and a second return spring is provided between the second screw 12 and the plug 8. During use, when the hydraulic pressure initially increases, the valve stem 7 moves laterally against the tension of the first return spring, and the first pressure relief channel 5 is connected to the input channel 3. When the hydraulic pressure further increases, the plug 8 moves laterally against the tension of the second return spring, and the second pressure relief channel 6 is connected to the input channel 3, performing a staged pressure relief action. The fuel control valve can automatically match the corresponding pressure relief path according to different pressure levels, taking into account both stable pressure relief during small overpressure and rapid and safe pressure relief during extreme overpressure. This not only improves the dynamic response capability and safety protection level of the system, but also extends the service life of the valve body 1 and related components, greatly enhancing the overall reliability and operational stability of the fuel system under complex working conditions. Furthermore, the initial tension of the first return spring and the second return spring can be changed by rotating the first screw 11 and the second screw 12.

[0037] In this embodiment, the drive assembly 2 located on one side of the valve body 1 enables precise control of the rotation of the valve stem 7.

[0038] A drive assembly 2 is provided on one side of the valve body 1. The drive assembly 2 includes a knob 201 that is rotatably mounted on the outside of the valve body 1, and a worm gear 202 that is rotatably mounted on the inside of the valve body 1. One end of the worm gear 202 passes through the valve body 1 and is fixedly connected to the knob 201. The user can directly rotate the knob 201 manually. One end of the knob 201 passes through the valve body 1 and is fixedly connected to the worm gear 202 inside. When the knob 201 rotates, it drives the worm gear 202 to rotate synchronously.

[0039] The worm 202 is also meshed with the worm wheel 203 rotatably mounted inside one side of the valve body 1. A square rod 204 is fixedly connected to one side of the worm 202 and slidably connected to the valve stem 7. Rotating the knob 201 controls the valve stem 7 to rotate. Through the transmission ratio between the worm 202 and the worm wheel 203, the output rotation angle can be precisely controlled. A square rod 204 is fixedly connected to one side of the worm 202 and slidably connected to the valve stem 7. Even if the valve stem 7 itself has a lateral sliding function, it can still maintain a stable rotation drive linkage.

[0040] During use, the rotation of knob 201 transmits the rotational torque to square rod 204 through worm gear 202-worm wheel 203 mechanism, which in turn drives valve rod 7 to rotate around its axis, thereby adjusting the relative position between the internal output hole of valve rod 7 and the inner wall of valve body 1, and finally achieving precise adjustment of fuel flow.

[0041] This design is not only easy to operate and sensitive to adjustment, but also has a self-locking capability through the transmission characteristics of the worm gear 202 and worm wheel 203, which can prevent the valve stem 7 from being accidentally displaced under the action of high pressure fluid, thereby improving the stability and safety of the fuel control system.

[0042] The working principle of this utility model is as follows: by providing a rotatable and laterally sliding valve stem 7 inside the valve body 1, combined with the coordinated cooperation of the input hole 703, the first output hole 704 and the first pressure relief channel 5, the integration of fuel flow regulation and automatic pressure relief protection functions is realized.

[0043] During normal operation, fuel enters through the input channel 3 at the top of the valve body 1, flows into the valve stem 7 through the input hole 703, and is output through the first output hole 704 of the valve stem 7. A variable output end gap is formed between the first output hole 704 and the inner wall of the valve body 1. The fuel flow can be precisely adjusted by rotating the valve stem 7.

[0044] When the system oil pressure rises, the hydraulic pressure acts on the valve stem 7 laterally through the first transmission channel 9, and the first annular groove 701 is connected to the first pressure relief channel 5 to release part of the pressure. If the pressure continues to rise, the hydraulic pressure acts on the plug 8 that is slidably installed in the second pressure relief channel 6 through the second transmission channel 10, so that the plug 8 moves against the tension of the second return spring, and the second pressure relief channel 6 opens to complete a larger-scale pressure release.

[0045] Meanwhile, the drive assembly 2 includes a linkage structure of knob 201, worm gear 202, worm wheel 203 and square rod 204. Rotating knob 201 can drive square rod 204 to rotate through the worm gear 202 and worm wheel 203 mechanism, thereby realizing fine angle adjustment of valve rod 7. Rotation control can also be maintained in the lateral sliding state, ensuring flexible and reliable fuel system flow regulation.

[0046] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A fuel control valve with a safety device, comprising a valve body (1), characterized in that: Also includes; A valve stem (7) is slidably installed inside the transverse channel of the valve body (1) and is rotatable. The valve stem (7) has an input hole (703) and a first output hole (704). The first output hole (704) is fan-shaped. When the valve stem (7) rotates, a variable output end gap is formed between the first output hole (704) and the inner wall of the valve body (1). The valve body (1) has an input channel (3) on its upper part. The input hole (703) is connected to the input channel (3). The valve body (1) also has a first transmission channel (9) inside. The first transmission channel (9) is connected to the input channel (3). When the pressure inside the input channel (3) is too high, the hydraulic pressure drives the valve stem (7) to move laterally through the first transmission channel (9). At this time, the input channel (3) is connected to the first pressure relief channel (5) opened at the lower part of the valve body (1).

2. A fuel control valve with a safety device according to claim 1, characterized in that: The valve body (1) has an output channel (4) at the bottom, which is used to connect the load through a pipeline.

3. A fuel control valve with a safety device according to claim 1, characterized in that: The valve stem (7) has a first annular groove (701) that communicates with the input channel (3) and a second annular groove (702) that communicates with the first transmission channel (9). When the internal hydraulic pressure of the valve body (1) is too high, the valve stem (7) is driven to make a lateral movement through the first annular groove (701). At this time, the first annular groove (701) is connected to the input channel (3), and the first annular groove (701) connects the input channel (3) and the first pressure relief channel (5).

4. A fuel control valve with a safety device according to claim 1, characterized in that: The valve stem (7) has a hollow channel (706) inside. The input hole (703) and the first output hole (704) are respectively connected to the hollow channel (706). The valve stem (7) also has a second output hole (705) connected to the hollow channel (706). The second output hole (705) is connected to the second transmission channel (10) opened in the valve body (1). The second transmission channel (10) is connected to the second pressure relief channel (6) opened on the upper part of the valve body (1). The plug (8) slidably installed in the second pressure relief channel (6) is movable to block the connection between the second pressure relief channel (6) and the second transmission channel (10).

5. A fuel control valve with a safety device according to claim 4, characterized in that: The valve body (1) is screwed with a first screw (11) and a second screw (12) on one side. A first return spring is fixedly installed between the first screw (11) and the valve stem (7). A second return spring is provided between the second screw (12) and the plug (8). When in use, when the hydraulic pressure initially rises, the valve stem (7) moves laterally against the tension of the first return spring. The first pressure relief channel (5) is connected to the input channel (3). When the hydraulic pressure further rises, the plug (8) moves laterally against the tension of the second return spring. The second pressure relief channel (6) is connected to the input channel (3), and a graded pressure relief action is performed.

6. A fuel control valve with a safety device according to claim 1, characterized in that: A drive assembly (2) is provided on one side of the valve body (1). The drive assembly (2) includes a knob (201) rotatably mounted on the outside of the valve body (1). One end of a worm gear (202) rotatably mounted on the inside of the valve body (1) passes through the valve body (1) and is fixedly connected to the knob (201). The worm gear (202) is also meshed with a worm wheel (203) rotatably mounted on the inside of the valve body (1). A square rod (204) is fixedly connected to one side of the worm gear (202) and slidably connected to the valve stem (7). Rotating the knob (201) controls the valve stem (7) to rotate.

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