Oil pressure control device of oil conveying pipe and oil supply device

Abstract

The embodiment of the utility model provides an oil pressure control device of an oil conveying pipe and an oil supply device, and the oil pressure control device comprises a shell provided with an inner cavity, and the cavity wall of the inner cavity sinks inwards to form a stop structure; the hollow rod piece penetrates through the cavity bottom of the inner cavity; the pressure component comprises a guide rod, a spring assembly and a piston, the first end of the spring assembly is arranged at the bottom of the inner cavity and is penetrated by the hollow rod piece, the guide rod is arranged in a hollow cavity of the hollow rod piece and is connected with the piston, the second end of the spring assembly is connected with the piston, and the piston protrudes on the outer wall to form a clamping structure matched with the stopping structure. The embodiment of the utility model can control the oil pressure of the fuel oil in the oil delivery pipe.

Description

Technical Field

[0001] This application relates to the field of marine low-speed diesel engine technology, specifically to an oil pressure control device for an oil pipeline and an oil supply device. Background Technology

[0002] In related technologies, the fuel injection system of marine low-speed diesel engines may cause pressure fluctuations in the fuel supply line during the fuel injection process. These pressure fluctuations may cause additional stress on the fuel supply line, which may result in serious or irreparable damage to related valves, filters, instruments, etc. Utility Model Content

[0003] To address the shortcomings of existing technologies, this application proposes an oil pressure control device and an oil supply device for an oil pipeline, which aims to control the oil pressure of fuel in the oil pipeline.

[0004] To achieve the above objectives, this application provides an oil pressure control device for an oil pipeline, comprising:

[0005] The housing has an inner cavity, and the cavity wall of the inner cavity is recessed to form a resistive structure;

[0006] A hollow rod is inserted through the bottom of the inner cavity;

[0007] The pressure component includes a guide rod, a spring assembly, and a piston. The first end of the spring assembly is disposed at the bottom of the inner cavity and is penetrated by the hollow rod. The guide rod is disposed in the hollow cavity of the hollow rod and connected to the piston. The second end of the spring assembly is connected to the piston. The piston has a protrusion on its outer wall to form a locking structure that cooperates with the blocking structure.

[0008] In one embodiment, the spring assembly includes:

[0009] A stop block is provided at the bottom of the inner cavity and is penetrated by the hollow rod;

[0010] A spring, the first end of which is disposed on the stop block, and the second end of which is connected to the piston.

[0011] In one embodiment, the housing includes:

[0012] The first housing portion is provided with a first cavity;

[0013] The second housing portion has openings on both the first and second sides, and the two openings are connected to form a hollow cylindrical cavity in the second housing portion;

[0014] The first cavity and the hollow cylindrical cavity are combined to form the inner cavity.

[0015] In one embodiment, the inner diameter of the opening on the first side of the second housing portion is larger than the inner diameter of the opening on the second side of the second housing portion, and the inner diameter of the opening of the first cavity is smaller than the inner diameter of the opening on the first side of the second housing portion. The opening on the first side of the second housing portion and the opening of the first cavity are joined together to form the inner cavity.

[0016] In one embodiment, the hollow rod includes:

[0017] A hollow screw rod passes through the bottom of the inner cavity;

[0018] A locking nut is fitted onto the portion of the hollow screw located outside the housing.

[0019] In one embodiment, the piston is provided with a second cavity, the guide rod is connected to the bottom of the second cavity, and the second end of the spring is connected to the bottom of the second cavity.

[0020] In one embodiment, when the spring extends to block the locking structure by the blocking structure, the fuel contact surface of the piston is flush with the opening on the second side.

[0021] In one embodiment, the housing further includes:

[0022] The first sealing ring is disposed on the cavity wall portion that contacts the outer wall of the piston within the inner cavity.

[0023] In one embodiment, the pressure component further includes:

[0024] The second sealing ring is disposed on the outer wall portion of the piston that contacts the cavity wall of the inner cavity.

[0025] To achieve the above objectives, this application also provides an oil supply device, which includes an oil pipeline and the device as described above, the device being disposed on the oil pipeline.

[0026] This application provides an oil pressure control device and an oil supply device for an oil pipeline. The oil pressure control device includes: a housing with an inner cavity, the cavity wall of which is recessed to form a stop structure; a hollow rod passing through the bottom of the inner cavity; and a pressure component including a guide rod, a spring assembly, and a piston. The first end of the spring assembly is located at the bottom of the inner cavity and is penetrated by the hollow rod. The guide rod is located within the hollow cavity of the hollow rod and connected to the piston. The second end of the spring assembly is connected to the piston. The piston has a protrusion on its outer wall forming a locking structure that cooperates with the stop structure. Through the cooperation of the piston and the spring assembly, when the fuel pressure in the oil pipeline is too high, the fuel can push against the piston, thereby offsetting the excessive oil pressure through the spring assembly to balance the oil pressure. When the fuel pressure in the oil pipeline is too low, the piston can push against the fuel, thereby pressurizing the fuel with insufficient pressure through the spring assembly to balance the oil pressure, thus achieving oil pressure control in the oil pipeline. In addition, the use of a guide rod allows the piston's fuel contact surface to remain parallel to the opening of the inner cavity, thereby making the force between the piston's fuel contact surface and the fuel more balanced and effectively improving the oil pressure control effect. Attached Figure Description

[0027] Figure 1 This is an external structural diagram of an oil pressure control device for an oil pipeline provided in an embodiment of this application.

[0028] Figure 2 yes Figure 1 A cross-sectional view of the hydraulic control device along line AA.

[0029] Figure label:

[0030] The components include: housing 100, inner cavity 110, blocking structure 120, first housing part 130, first cavity 131, second housing part 140, hollow cylinder cavity 141, first sealing ring 150, hollow rod 200, hollow screw 210, locking nut 220, pressure component 300, guide rod 310, spring assembly 320, stop block 321, spring 322, piston 330, second cavity 331, locking structure 340, and second sealing ring 350. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0032] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0033] In related technologies, the fuel injection system of marine low-speed diesel engines may cause pressure fluctuations in the fuel supply line during the fuel injection process. These pressure fluctuations may cause additional stress on the fuel supply line, which may result in serious or irreparable damage to related valves, filters, instruments, etc.

[0034] To control the fuel pressure in a fuel pipeline, this application provides a fuel pressure control device and a fuel supply device for a fuel pipeline. The fuel pressure control device includes: a housing with an inner cavity, the cavity wall of which has a recessed retaining structure; a hollow rod inserted through the bottom of the inner cavity; and a pressure component including a guide rod, a spring assembly, and a piston. The first end of the spring assembly is located at the bottom of the inner cavity and is penetrated by the hollow rod. The guide rod is located within the hollow cavity of the hollow rod and connected to the piston. The second end of the spring assembly is connected to the piston. The piston has a protrusion on its outer wall forming a locking structure that cooperates with the retaining structure. Through the cooperation of the piston and the spring assembly, when the fuel pressure in the fuel pipeline is too high, the fuel can push against the piston, thereby offsetting the excessive fuel pressure through the spring assembly to balance the fuel pressure. When the fuel pressure in the fuel pipeline is too low, the piston can push against the fuel, thereby pressurizing the fuel with insufficient pressure through the spring assembly to balance the fuel pressure, thus achieving fuel pressure control in the fuel pipeline. In addition, the use of a guide rod allows the piston's fuel contact surface to remain parallel to the opening of the inner cavity, thereby making the force between the piston's fuel contact surface and the fuel more balanced and effectively improving the oil pressure control effect.

[0035] See Figure 1 and Figure 2 , Figure 1 The present application illustrates the external structure of an oil pressure control device for an oil pipeline according to one embodiment. Figure 2 The hydraulic control device is shown along Figure 1 The cross-sectional structure of line AA in the diagram. In this embodiment, the hydraulic control device may include a housing 100, a hollow rod 200, and a pressure component 300.

[0036] The housing 100 has an inner cavity 110, and a retaining structure 120 is formed by recesses on the inner wall of the inner cavity 110. The retaining structure 120 can be a structure with a gradually decreasing inner diameter, or it can be... Figure 2 The stepped shape shown, etc., is not specifically limited here.

[0037] The hollow rod 200 passes through the bottom of the inner cavity 110. After passing through the bottom of the inner cavity 110, the hollow rod 200 can be fixed to the shell 100 by welding, bolts or other means, which are not specifically limited here.

[0038] The pressure component 300 may include a guide rod 310, a spring assembly 320, and a piston 330. The first end of the spring assembly 320 is disposed at the bottom of the inner cavity 110 and is penetrated by the hollow rod 200. The guide rod 310 is disposed within the hollow cavity of the hollow rod 200 and connected to the piston 330. The second end of the spring assembly 320 is connected to the piston 330. The piston 330 has a protrusion on its outer wall forming a locking structure 340 that cooperates with the stop structure. The spring assembly 320 may be a separate spring or other component capable of elastic function; no specific limitation is made here. Furthermore, the piston 330 may be connected to the second end of the spring assembly 320 by means of a piston stop, direct connection, etc.; no specific limitation is made here.

[0039] Specifically, when the oil pressure in the fuel line is too high, the fuel will push the fuel contact surface of the piston 330 to reduce the oil pressure, and the piston 330 can move towards the bottom of the inner cavity 110. During the movement of the piston 330, the guide rod 310 will also move along the hollow cavity of the hollow rod 200 to guide the piston 330. The spring assembly 320 will be compressed by the fuel, and the locking structure 340 will also move in the blocking structure 120 until the locking structure 340 is blocked by the blocking structure 120.

[0040] When the oil pressure in the fuel line is too low, the spring assembly 320 can extend. Under the action of the spring assembly 320, the piston 330 moves away from the bottom of the inner cavity 110. During the movement of the piston 330, the guide rod 310 also moves along the hollow cavity of the hollow rod 200 to guide the piston 330. The fuel contact surface of the piston 330 pushes the fuel in the inner cavity 110 back into the fuel line to increase the oil pressure. The locking structure 340 also moves within the blocking structure 120 until it is blocked by the blocking structure 120. When the locking structure 340 is blocked by the blocking structure 120, the inner cavity 110 may or may not contain fuel; this is not specifically limited.

[0041] In one embodiment, the spring assembly 320 may include a stop block 321 and a spring 322. The stop block 321 is disposed at the bottom of the inner cavity 110 and is penetrated by the hollow rod 200. The first end of the spring 322 is disposed on the stop block 321, and the second end of the spring 322 is connected to the piston 330. By providing the stop block, the spring can quickly return to its original position, thereby enabling the hydraulic pressure control device to respond quickly to the hydraulic pressure in the oil pipeline, thus reducing hydraulic pressure fluctuations in the oil pipeline. In addition, the stop block can provide isolation between the bottom of the inner cavity 110 and the first end of the spring 322, reducing wear on the bottom of the inner cavity 110 caused by the spring 322.

[0042] In one embodiment, the housing 100 may include a first housing portion 130 and a second housing portion 140. The first housing portion 130 is provided with a first cavity 131, and the second housing portion 140 is provided with openings on both a first side and a second side, the two openings communicating to form a hollow cylindrical cavity 141 within the second housing portion 140. The first cavity 131 and the hollow cylindrical cavity 141 combine to form an inner cavity 110. The first housing portion 130 may be connected and fixed to the second housing portion 140 by bolts, welding, etc., and the specific method is not limited here. The relationship between the inner diameters of the two openings of the hollow cylindrical cavity 141 and the inner diameter of the first cavity 131 can be varied and is not specifically limited here.

[0043] In one embodiment, the second housing portion 140 is on the first side (i.e. Figure 2 The inner diameter of the opening on the left side is larger than that of the second housing portion 140 on the second side (i.e., Figure 2 The inner diameter of the opening on the right side of the first cavity 131 is smaller than the inner diameter of the opening on the first side of the second housing portion 140. The opening on the first side of the second housing portion 140 and the opening of the first cavity 131 are joined to form an inner cavity 110. Specifically, when the opening on the first side of the second housing portion 140 and the opening of the first cavity 131 are joined to form the inner cavity 110, the bottom of the first cavity 131 serves as the bottom of the inner cavity 110. Specifically, since the second housing portion 140 on the first side (i.e., the opening on the right side of the first cavity 131) has a smaller inner diameter than the opening on the first side of the second housing portion 140, the opening on the first side of the second housing portion 140 is smaller than the opening on the first side of the second housing portion 140. Figure 1 The inner diameter of the opening on the left side is larger than that of the second housing portion 140 on the second side (i.e., Figure 1 The inner diameter of the opening on the right side of the hollow cylinder 141 can be such that the inner diameter gradually decreases or a stepped structure can be formed inside the hollow cylinder cavity 141. Figure 2 For example, the hollow cylindrical cavity 141 can be formed into a stepped structure that can obstruct the locking structure 340 when the oil pressure in the oil pipeline is too low, causing it to move away from the bottom of the cavity 110. Since the inner diameter of the opening of the first cavity 131 is smaller than the inner diameter of the opening of the second shell portion 140 on the first side, the hollow cylindrical cavity 141 can be formed with a structure where the inner diameter gradually decreases or a stepped structure, in order to... Figure 2 For example, the hollow cylinder cavity 141 can be formed into a stepped structure that can obstruct the locking structure 340 when the oil pressure in the oil pipe is too high and moves towards the bottom of the inner cavity 110. These two stepped structures constitute the aforementioned blocking structure. By setting the relationship between the inner diameters of the openings at both ends of the second housing portion and the inner diameter of the opening of the first cavity, the blocking structure can be formed by both the second housing portion and the first housing portion, avoiding the situation where it is formed by only one of the second housing portion and the first housing portion. This effectively reduces the installation difficulty of the pressure component and helps to improve installation efficiency.

[0044] In one embodiment, the hollow rod 200 may include a hollow screw 210 and a locking nut 220. The hollow screw 210 may pass through the bottom of the inner cavity 110, and the locking nut 220 is sleeved on the portion of the hollow screw 210 located outside the housing 100. Specifically, since the locking nut 220 and the hollow screw 210 can cooperate with each other, the length of the portion of the hollow screw 210 located in the inner cavity 110 can be adjusted by rotating the locking nut 220. The hollow screw 210 can obstruct the piston 330, allowing the hydraulic pressure control range of the piston 330 to be adjusted within the range allowed by the obstruction structure 120, thereby making the hydraulic pressure control device more flexible.

[0045] In one embodiment, the piston 330 is provided with a second cavity 331, the guide rod 310 is connected to the bottom of the second cavity 331, and the second end of the spring 322 is connected to the bottom of the second cavity 331. By providing the second cavity, the weight of the piston can be reduced, thereby enabling the spring to respond more sensitively to changes in oil pressure, which helps to improve the oil pressure control response speed of the oil pressure control device.

[0046] In one embodiment, when the spring 322 extends to block the locking structure 340 by the blocking structure 120, the fuel contact surface of the piston 330 is flush with the opening of the second housing portion 140 on the second side. Here, "flush" means that the height difference between the fuel contact surface of the piston 330 and the opening of the second housing portion 140 on the second side is less than a preset minimum value. Because the fuel contact surface is flush with the opening of the second housing portion on the second side, the piston will not obstruct the fuel in the fuel delivery line after the fuel in the line has been pressurized, thereby preventing the piston from reducing the fuel flow rate and helping to maintain the current fuel pressure.

[0047] In one embodiment, the housing 100 may further include a first sealing ring 150, which is disposed on the cavity wall portion of the inner cavity 110 that contacts the outer wall of the piston 330. Specifically, since the piston 330 needs to move within the inner cavity 110, and the manufacturing process cannot completely make the outer diameter of the piston 330 and the inner diameter of the inner cavity 110 exactly the same, there is actually a gap between the piston 330 and the cavity wall of the inner cavity 110. By providing the first sealing ring 150 on the cavity wall portion of the inner cavity 110 that contacts the outer wall of the piston 330, the sealing performance between the piston 330 and the cavity wall of the inner cavity 110 can be improved, thereby effectively preventing fuel from entering the inner cavity 110 and the space where the spring assembly 320 and the guide rod 310 are located, thus effectively preventing the oil pressure control function of the oil pressure control device from malfunctioning.

[0048] In one embodiment, the pressure component 300 may further include a second sealing ring 350, which is disposed on the outer wall portion of the piston 330 that contacts the cavity wall of the inner cavity 110. Specifically, there is a gap formed by tolerance between the piston 330 and the cavity wall of the inner cavity 110. By providing the second sealing ring 350 on the outer wall portion of the piston 330 that contacts the cavity wall of the inner cavity 110, the sealing performance between the piston 330 and the cavity wall of the inner cavity 110 can be improved, thereby effectively preventing fuel from entering the inner cavity 110, the space where the spring assembly 320 and the guide rod 310 are located, and thus effectively preventing the hydraulic control function of the hydraulic control device from malfunctioning. In addition, when the first sealing ring 150 and the second sealing ring 350 are present simultaneously, the sealing performance between the piston 330 and the cavity wall of the inner cavity 110 can be further improved.

[0049] This application also provides an oil supply device, which may include an oil pipeline and the devices described in the above embodiments, with an oil pressure control device installed on the oil pipeline.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, the simultaneous existence of A and B, or the existence of B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c can represent: the existence of a alone, the existence of b alone, the existence of c alone, the simultaneous existence of a and b, the simultaneous existence of a and c, the simultaneous existence of b and c, or the simultaneous existence of a, b, and c, where a, b, and c can be single or multiple.

[0052] In the embodiments of this application, "instruction" can include direct and indirect instructions, as well as explicit and implicit instructions. The information indicated by a certain piece of information is called the information to be instructed. In the specific implementation process, there can be many ways to instruct the information to be instructed, such as, but not limited to, directly instructing the information to be instructed, such as instructing the information to be instructed itself or its index. It can also indirectly instruct the information to be instructed by instructing other information, where there is a relationship between the other information and the information to be instructed. It can also instruct only a part of the information to be instructed, while the other parts are known or pre-agreed upon. For example, the instruction of specific information can be achieved by using a pre-agreed (e.g., protocol-defined) arrangement of various pieces of information, thereby reducing the instruction overhead to some extent.

[0053] In the embodiments of this application, the terms and English abbreviations are exemplary examples given for ease of description and should not be construed as limiting the application in any way. This application does not preclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.

[0054] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0055] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A hydraulic pressure control device for an oil pipeline, characterized in that, include: The housing has an inner cavity, and the cavity wall of the inner cavity is recessed to form a resistive structure; A hollow rod is inserted through the bottom of the inner cavity; The pressure component includes a guide rod, a spring assembly, and a piston. The first end of the spring assembly is disposed at the bottom of the inner cavity and is penetrated by the hollow rod. The guide rod is disposed in the hollow cavity of the hollow rod and connected to the piston. The second end of the spring assembly is connected to the piston. The piston has a protrusion on its outer wall to form a locking structure that cooperates with the blocking structure.

2. The apparatus according to claim 1, characterized in that, The spring assembly includes: A stop block is provided at the bottom of the inner cavity and is penetrated by the hollow rod; A spring, the first end of which is disposed on the stop block, and the second end of which is connected to the piston.

3. The apparatus according to claim 2, characterized in that, The housing includes: The first housing portion is provided with a first cavity; The second housing portion has openings on both the first and second sides, and the two openings are connected to form a hollow cylindrical cavity in the second housing portion; The first cavity and the hollow cylindrical cavity are combined to form the inner cavity.

4. The apparatus according to claim 3, characterized in that, The inner diameter of the opening on the first side of the second housing portion is larger than the inner diameter of the opening on the second side of the second housing portion, and the inner diameter of the opening of the first cavity is smaller than the inner diameter of the opening on the first side of the second housing portion. The opening on the first side of the second housing portion and the opening of the first cavity are joined together to form the inner cavity.

5. The apparatus according to claim 1, characterized in that, The hollow rod includes: A hollow screw rod passes through the bottom of the inner cavity; A locking nut is fitted onto the portion of the hollow screw located outside the housing.

6. The apparatus according to claim 3, characterized in that, The piston is provided with a second cavity, the guide rod is connected to the bottom of the second cavity, and the second end of the spring is connected to the bottom of the second cavity.

7. The apparatus according to claim 3, characterized in that, When the spring extends to block the locking structure by the blocking structure, the fuel contact surface of the piston is flush with the opening on the second side.

8. The apparatus according to claim 7, characterized in that, The housing also includes: The first sealing ring is disposed on the cavity wall portion that contacts the outer wall of the piston within the inner cavity.

9. The apparatus according to claim 8, characterized in that, The pressure component also includes: The second sealing ring is disposed on the outer wall portion of the piston that contacts the cavity wall of the inner cavity.

10. An oil supply device, characterized in that, The oil supply device includes an oil pipeline and the device according to any one of claims 1 to 9, wherein the device is disposed on the oil pipeline.

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