On-off valve capable of achieving flexible fuel switching function

Abstract

The utility model belongs to the technical field of ship power machinery, and discloses an on-off valve capable of realizing a flexible fuel switching function. Comprising a shell, the periphery of the shell is sleeved with a material returning flange, a first containing cavity allowing a servo oil pilot control valve assembly to move up and down is further formed in the shell, a first communicating channel is formed between the material returning flange and the first containing cavity, and the servo oil pilot control valve assembly moves up and down to control opening and closing of the first communicating channel; the periphery of the servo oil pilot control valve assembly is sleeved with a distribution block, and the distribution block is provided with a conveying channel communicating with the first communicating channel. A feeding flange is arranged at the bottom of the shell and provided with a feeding hole communicated with the conveying channel. Rapid switching between novel fuel supply and diesel fuel supply is achieved, and the system is particularly suitable for high-power medium-low-speed fuel engines.

Description

Technical Field

[0001] The utility model relates to the technical field of ship power machinery, in particular to an on-off valve capable of realizing a flexible fuel switching function. Background Art

[0002] In order to be suitable for high-power marine engines, a fuel injection device that can realize flexible injection of multiple fuels is particularly important. The design of high-power marine multi-fuel engines puts forward higher requirements for the switching control valve structure of the fuel supply end outside the injector: it must meet the reliability requirements of the diesel and low-carbon fuels of the marine main engine in the single large-flow injection mode, and meet the need to complete the rapid fuel switching without stopping the machine. In order to meet this demand, multiple sets of high-pressure common rail fuel injection systems are usually used to achieve it. However, the use of multiple injectors will make the cylinder head layout in a limited space more difficult, and the two injectors will not work at the same time, and the design redundancy is too high. In addition, when the two fuel systems use a high-pressure common rail design, the space outside the machine is also cramped, which increases the difficulty and cost of the production and processing of the fuel system. Therefore, it is particularly important to design a switching control valve that can meet the requirements of flexible control of multiple fuels, high component integration and high reliability. Utility Model Content

[0003] The purpose of the utility model is to solve the above problems and provide an on-off valve capable of realizing flexible fuel switching function, realizing rapid switching of new fuel and diesel fuel supply, and is particularly suitable for high-power medium and low-speed fuel engines.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an on-off valve capable of realizing a flexible fuel switching function, comprising a housing, a return flange is sleeved on the outer periphery of the housing, a first accommodating chamber for the servo oil pilot control valve assembly to move up and down is provided inside the housing, a first communicating channel is provided between the return flange and the first accommodating chamber, and the on-off of the first communicating channel is controlled by the up-and-down movement of the servo oil pilot control valve assembly; a distribution block is sleeved on the outer periphery of the servo oil pilot control valve assembly, and the distribution block has a delivery channel communicated with the first communicating channel;

[0005] A feed flange is arranged at the bottom of the shell body, and the feed flange has a feed hole communicated with the conveying channel.

[0006] According to the utility model, further, the first connecting channel includes a transfer channel arranged inside the shell, one end of the transfer channel is connected to the delivery channel, and the other end is connected to the return flange, and the fuel is discharged from the return flange through the distribution block and the transfer channel in sequence.

[0007] According to the utility model, further, the return material flange has a return material channel, one end of the return material channel penetrates the outer peripheral wall of the return material flange, and the other end extends into the shell body to communicate with the feed channel.

[0008] According to the utility model, further, the servo oil pilot control valve assembly includes an electromagnetic drive assembly that provides driving force, the output end of the electromagnetic drive assembly is connected to a cone valve, and the electromagnetic drive assembly drives the cone valve to move linearly.

[0009] According to the utility model, further, a valve seat is arranged on the top of the shell, and the valve seat has a second accommodating chamber for accommodating the servo oil pilot control valve assembly, and the second accommodating chamber is communicated with the first accommodating chamber.

[0010] According to the utility model, further, the cone valve is coaxially assembled with the first accommodating chamber.

[0011] According to the utility model, further, the cone valve includes a rod and a valve head connected to the rod, the rod is located in the second accommodating chamber, the valve head is located in the first accommodating chamber, and the bottom diameter of the valve head corresponds to the bottom area of ​​the first accommodating chamber.

[0012] According to the utility model, further, the cross section of the valve head is a positive cone, and the first accommodating cavity has an inclined surface matching the conical surface of the valve head; in the reset state, the inclined surface fits the conical surface of the valve head, and the contact surfaces of the two form a linear sealing structure, thereby improving the sealing performance of the first accommodating cavity and the valve head.

[0013] According to the utility model, further, a spring is sleeved on the outer periphery of the rod, the starting end of the spring is fixedly connected to the electromagnetic drive assembly, and the ending end opposite to the starting end of the spring is fixedly connected to the bottom wall of the second accommodating cavity. The elastic force helps the rod to quickly reset and improve its reset speed.

[0014] According to the utility model, further, the first accommodating chamber, the second accommodating chamber and the rod are coaxially assembled. Compared with the prior art, the utility model has the beneficial effect that the servo oil pilot control valve assembly drives the distribution block to move up and down, realizes the opening and closing of the first connecting channel, and then realizes the rapid switching of the supply of the new fuel and the diesel fuel, which is particularly suitable for high-power medium and low-speed fuel engines.

[0015] The servo oil pilot hydraulic drive controlled on-off valve assembly adopts an electromagnetic hydraulic pilot control structure, which realizes the on-off function of the fuel main on-off valve core through the pilot control of the hydraulic oil, and realizes the rapid response capability under the on-off valve structure by matching the spring force, hydraulic pressure and electromagnetic force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an on-off valve capable of realizing a flexible fuel switching function of the utility model;

[0017] Figure 2 for Figure 1 AA cross-sectional structural diagram;

[0018] Figure 3 for Figure 2 A partial enlarged schematic diagram of point B.

[0019] In the figure: 100-housing, 110-first accommodating chamber, 111-inclined surface, 120-transfer channel, 200-servo oil pilot control valve assembly 200, 210-electromagnetic drive assembly, 220-cone valve, 221-rod, 222-valve head, 223-spring, 230-distribution block, 231-conveying channel, 300-return flange, 310-return channel, 400-feed flange, 410-feed hole, 500-valve seat, 510-second accommodating chamber. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-3As shown, an on-off valve capable of realizing a flexible fuel switching function in an embodiment of the utility model comprises a housing 100, a return material flange 300 is sleeved on the outer periphery of the housing 100, the return material flange 300 has a return material channel 310, one end of the return material channel 310 passes through the outer peripheral wall of the return material flange 300, and the other end extends to the inside of the housing 100; a transfer channel 120 connected to the return material channel 310 is arranged inside the housing 100, and a first accommodating chamber 110 for the servo oil pilot control valve assembly 200 to move up and down is also provided inside the housing 100, and the transfer channel 120 is connected to the first accommodating chamber 110; the on-off of the fuel channel is controlled by the up-and-down movement of the servo oil pilot control valve assembly 200; the first accommodating chamber 110 is coaxially assembled with the servo oil pilot control valve assembly 200; a valve seat 500 is arranged on the top of the housing 100, and the valve seat 500 has a cone valve 22 0, the second accommodating chamber 510 is communicated with the first accommodating chamber 110; a feed flange 400 is provided at the bottom of the shell 100, and the feed flange 400 has a feed hole 410 communicated with the delivery channel 231 described below, and fuel is supplied through the feed hole 410; wherein, the servo oil pilot control valve assembly 200 includes an electromagnetic drive assembly 210 that provides a driving force, and the output end of the electromagnetic drive assembly 210 is connected to a cone valve 220, and the cone valve 220 is coaxial with the first accommodating chamber 110, and the electromagnetic drive assembly 210 drives the cone valve 220 to reciprocate in the second accommodating chamber 510 and the first accommodating chamber 110; a distribution block 230 is sleeved on the outer periphery of the cone valve 220, and the distribution block 230 has a delivery channel 231, and the delivery channel 231 has a feed port communicated with the feed hole 410 of the fuel and a discharge port for discharging the oil to the feed channel 120. A purge channel can also be provided in the distribution block 230, and a purge assembly is connected to the purge channel to purge new fuel in the residual system to increase the safety and reliability of the system; the purge assembly is a prior art and will not be described here. The electromagnetic drive assembly 210 cooperates with the hydraulic oil to drive the control cone valve 220 to move up and down in the accommodating chamber 110. When the electromagnetic drive assembly 210 is powered on, the cone valve 220 moves downward, and the position of the distribution block 230 corresponds to the position of the feed channel 120, that is, the delivery channel 231 is connected to the feed channel 120, and the cone valve 220 is in an open state. The fuel enters from the fuel feed hole 410, passes through the delivery channel 231 and the feed channel 120, and then flows out from the return channel 310 to the injector connected thereto. When the electromagnetic drive assembly 210 is powered off, the cone valve 220 moves upward, the distribution block 230 moves away from the feed channel 210, the cone valve 220 is in a closed state, and the fuel feed hole 410 is disconnected from the return channel 310. The feed hole 410 and the return channel 310 are switched on and off by the movement of the cone valve 220, thereby switching the fuel feed and return functions. Preferably, the return channels 310 are two symmetrically arranged, and each return channel 310 is connected to an injector to improve the supply quantity and supply efficiency.

[0022] The cone valve 220 includes a rod 221 and a valve head 222 connected to the rod, the rod 221 is located in the second accommodating chamber 510, and the valve head 222 is located in the first accommodating chamber 110, and the bottom diameter of the valve head 222 corresponds to the bottom area of ​​the first accommodating chamber 110; the cross-section of the valve head 222 is a positive cone, and the first accommodating chamber 110 has an inclined surface 111 that matches the conical surface of the valve head 222; in the reset state, the inclined surface 111 fits with the conical surface of the valve head 222, so that the contact surface forms a linear sealing structure, thereby achieving a reliable sealing effect.

[0023] In order to achieve rapid closure of the cone valve 220 and improve its response speed, a spring 223 is sleeved on the outer periphery of the rod 221, and the starting end of the spring 223 is fixedly connected to the electromagnetic drive assembly 210, and the terminal end opposite to the starting end of the spring 223 is fixedly connected to the bottom wall of the second accommodating chamber 510. When the electromagnetic drive assembly 210 is powered on and started, the cone valve 220 moves downward, and the spring 223 is in a stretched state to achieve fuel circulation; when the electromagnetic drive assembly 210 is powered off, the spring 223 itself elastically drives the cone valve 220 to quickly reset upward, disconnecting the fuel circulation channel. The setting of the spring 223 improves the reset speed of the cone valve 220, further making the control of the fuel output more accurate and improving efficiency. The cross section of the valve head is a positive cone, with a large bottom area. The large valve head area means that the upward liquid pressure is also greater, so that only a smaller spring preload is required to close the valve head, which can effectively reduce the spring preload and reduce the requirements for the spring. In addition, the elastic force of the spring 223 cannot be too small, and it is necessary to ensure that the cone valve 220 has a sufficiently fast movement speed to improve the response speed of the on-off valve.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An on-off valve capable of realizing a flexible fuel switching function, characterized in that: The utility model comprises a housing, a return flange is sleeved on the outer periphery of the housing, a first accommodating chamber is provided inside the housing for the servo oil pilot control valve assembly to move up and down, a first communication channel is provided between the return flange and the first accommodating chamber, and the opening and closing of the first communication channel is controlled by the up and down movement of the servo oil pilot control valve assembly; A distribution block is sleeved on the outer periphery of the servo oil pilot control valve assembly, and the distribution block has a delivery channel communicated with the first communication channel; A feed flange is arranged at the bottom of the shell body, and the feed flange has a feed hole communicated with the conveying channel.

2. An on-off valve capable of realizing a flexible fuel switching function as claimed in claim 1, characterized in that: The first connecting passage comprises a feed passage arranged inside the shell, one end of the feed passage is connected to the delivery passage, and the other end is connected to the return flange. The fuel is discharged from the return flange through the distribution block and the feed passage in sequence.

3. An on-off valve capable of realizing a flexible fuel switching function as claimed in claim 2, characterized in that: The return material flange has a return material channel, one end of the return material channel penetrates the outer peripheral wall of the return material flange, and the other end extends into the shell body to communicate with the feed channel.

4. The on-off valve capable of realizing the flexible fuel switching function as claimed in claim 1, characterized in that: The servo oil pilot control valve assembly includes an electromagnetic drive assembly that provides driving force, the output end of the electromagnetic drive assembly is connected to a cone valve, and the electromagnetic drive assembly drives the cone valve to move linearly.

5. An on-off valve capable of realizing a flexible fuel switching function as claimed in claim 4, characterized in that: A valve seat is arranged on the top of the shell body. The valve seat has a second accommodating chamber for accommodating a servo oil pilot control valve assembly. The second accommodating chamber is communicated with the first accommodating chamber.

6. An on-off valve capable of realizing a flexible fuel switching function as claimed in claim 4, characterized in that: The cone valve is coaxially assembled with the first accommodating chamber.

7. An on-off valve capable of realizing a flexible fuel switching function as claimed in claim 5, characterized in that: The cone valve comprises a stem and a valve head connected to the stem, the stem is located in the second accommodating cavity, the valve head is located in the first accommodating cavity, and the bottom surface diameter of the valve head corresponds to the bottom area of ​​the first accommodating cavity.

8. An on-off valve capable of realizing a flexible fuel switching function as claimed in claim 7, characterized in that: The cross section of the valve head is a positive cone, and the first accommodating cavity has an inclined surface matching the conical surface of the valve head; in the reset state, the inclined surface fits the conical surface of the valve head, and the contact surfaces of the two form a linear sealing structure.

9. The on-off valve capable of realizing the flexible fuel switching function as claimed in claim 7, characterized in that: A spring is sleeved on the outer periphery of the rod portion, a starting end of the spring is fixedly connected to the electromagnetic drive assembly, and a terminal end opposite to the starting end of the spring is fixedly connected to the bottom wall of the second accommodating cavity.

10. An on-off valve capable of realizing a flexible fuel switching function as claimed in any one of claims 5 to 9, characterized in that: The first accommodating chamber, the second accommodating chamber and the rod portion are coaxially assembled.

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