Compact self-sealing valve

Abstract

The invention provides a compact self-sealing valve which is characterized in that a valve unit is configured to comprise a valve body and a plug, the valve body is provided with an oil duct, a first containing cavity and a second containing cavity which are communicated, the plug is provided with a first fuel oil flowing channel and a polygonal groove, and a sealing unit comprises a sealing jacket nut and a sealing valve element. The oil discharging unit comprises an oil discharging jacket nut, an oil discharging valve element, a connecting rod and a polygonal plug, the connecting rod is provided with a second fuel oil flowing channel, when the compact type self-sealing valve is in a closed state, the plug blocks the oil channel, the sealing jacket nut presses the sealing valve element, and when the compact type self-sealing valve is in an oil discharging state, the oil discharging valve element is arranged in the second containing cavity. The oil discharge jacket nut is used for pressing the oil discharge valve element, the plug is separated from the oil duct, and oil flows out of the oil duct. By means of the technical scheme, the problems that in the prior art, a valve is complex in structure, large in occupied space and poor in sealing performance are solved.

Description

Technical Field

[0001] The invention relates to the field of valves, and in particular to a compact self-sealing valve. Background Art

[0002] At present, many products have a high degree of integration, and the components and equipment are densely installed, which has put forward new requirements for the compactness of the equipment. For the fuel system, sealing is one of the very important indicators to judge its performance. In order to meet the requirements of combustion and engine matching, some products will fill the fuel system with gas of a certain pressure, which puts forward higher requirements for the sealing performance of the fuel system. As a valve structure involving filling and draining, its design determines the complexity and work efficiency of the filling and draining operation. The existing product structure is relatively complex, the operation is not easy, and the time required for fuel filling and draining is long; it occupies a large space and does not meet the compactness requirements; the sealing is poor. Summary of the invention

[0003] The invention provides a compact self-sealing valve, which can solve the technical problems in the prior art.

[0004] The present invention provides a compact self-sealing valve including: a valve unit, the valve unit including a valve body and a plug, the valve body having an oil passage, a first accommodating chamber and a second accommodating chamber connected to each other, the plug being arranged in the first accommodating chamber, the plug being threadedly connected to the valve body, the plug having a first fuel flow passage and a polygonal groove; a sealing unit, the sealing unit can be selectively installed on the valve body, the sealing unit including a sealing sleeve nut and a sealing valve core, when the compact self-sealing valve is in a closed state, the plug is arranged on the upper part of the oil passage to seal the oil passage, the sealing valve core is arranged in the second accommodating chamber, the sleeve nut is sleeved outside the valve body and threadedly connected to the valve body, the sealing sleeve nut is used to compress the sealing valve core; an oil discharge unit, the oil discharge unit including an oil discharge The outer sleeve nut, the oil drain valve core, the connecting rod and the polygonal plug, the oil drain valve core and the polygonal plug are both arranged on the connecting rod, the connecting rod has a second fuel flow channel, the oil drain outer sleeve nut is arranged on the oil drain valve core, when the compact self-sealing valve is in the oil draining state, the sealing outer sleeve nut and the sealing valve core are separated from the valve body, the polygonal plug cooperates with the polygonal groove, the oil drain valve core is arranged in the second accommodating chamber, the oil drain outer sleeve nut is sleeved outside the valve body and is connected to the valve body thread, the oil drain outer sleeve nut is used to compress the oil drain valve core, the polygonal plug is rotated by external force to drive the plug to move upward along the axial direction of the valve body, the plug is separated from the oil channel, the oil flows out from the oil channel and flows out through the first fuel flow channel and the second fuel flow channel in sequence.

[0005] Furthermore, a sealing unit is provided, which includes a first sealing ring, the sealing valve core has a first sealing groove, and the first sealing ring is arranged in the first sealing groove to achieve a sealing connection between the sealing valve core and the valve body.

[0006] Furthermore, the oil drain unit also includes a second sealing ring, the oil drain valve core has a second sealing groove, and the second sealing ring is arranged in the second sealing groove to achieve a sealed connection between the oil drain valve core and the valve body.

[0007] According to yet another aspect of the present invention, the sealing unit further comprises a pull ring, and the pull ring is arranged on the sealing valve core.

[0008] According to yet another aspect of the present invention, the first fuel flow passage includes a plurality of fuel flow holes, and the plurality of fuel flow holes are evenly spaced apart along a circumferential direction of the plug.

[0009] According to yet another aspect of the present invention, the first fuel flow passage is an annular fuel flow passage.

[0010] According to yet another aspect of the present invention, the oil discharge unit further comprises a handle, and the handle is disposed on the connecting rod.

[0011] According to another aspect of the present invention, the plug includes a first cylindrical segment, a second cylindrical segment and a blunt head which are connected in sequence, the polygonal groove is arranged on the first cylindrical segment, and the blunt head has an arc-shaped outer surface.

[0012] According to yet another aspect of the present invention, the blunt tip is made of metal.

[0013] The technical solution of the present invention is applied to provide a compact self-sealing valve. The valve unit 10 is configured to include a valve body 11 and a plug 12. The valve body 11 has a connected oil passage 111, a first accommodating chamber 112 and a second accommodating chamber 113. The plug 12 has a first fuel flow passage 121 and a polygonal groove 122. The sealing unit 20 includes a sealing sleeve nut 21 and a sealing valve core 22. The oil discharge unit 30 includes an oil discharge sleeve nut 31, an oil discharge valve core 32, a connecting rod 33 and a polygonal plug. 34. The connecting rod 33 has a second fuel flow channel 331. When the compact self-sealing valve is in the closed state, the plug 12 blocks the oil channel 111, and the sealing sleeve nut 21 presses the sealing valve core 22. When the compact self-sealing valve is in the oil discharge state, the oil discharge valve core 32 is arranged in the second accommodating chamber 113, and the oil discharge sleeve nut 31 is used to press the oil discharge valve core 32, and the plug 12 is separated from the oil channel 111. The oil flows out from the oil channel 111 and flows out through the first fuel flow channel 121 and the second fuel flow channel 331 in sequence. This structure is easy to operate, can save the time and operation required for fuel filling and draining, and improve work efficiency; the compact design greatly saves space; the sealing redundancy design greatly ensures the sealing reliability of the fuel system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 A cross-sectional view of a compact self-sealing valve in a closed state provided according to a specific embodiment of the present invention is shown;

[0016] Figure 2 A front view of a compact self-sealing valve in a closed state provided according to a specific embodiment of the present invention is shown;

[0017] Figure 3 and Figure 4 It shows a schematic structural diagram of a compact self-sealing valve in a closed state according to a specific embodiment of the present invention;

[0018] Figure 5 A cross-sectional view of a compact self-sealing valve provided according to a specific embodiment of the present invention when in an oil discharge state is shown;

[0019] Figure 6 It shows a structural schematic diagram of a compact self-sealing valve provided according to a specific embodiment of the present invention when it is in an oil discharge state;

[0020] Figure 7 A schematic diagram of a fuel passage when a compact self-sealing valve provided according to a specific embodiment of the present invention is in an oil discharge state is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Valve unit; 11. Valve body; 111. Oil channel; 112. First accommodating chamber; 113. Second accommodating chamber; 12. Plug; 121. First fuel flow channel; 122. Polygonal groove; 123. First cylindrical section 124. Second cylindrical section; 125. Blunt head; 20. Sealing unit; 21. Sealing sleeve nut; 22. Sealing valve core; 221. First sealing groove; 23. Pull ring; 24. First sealing ring; 30. Oil drain unit; 31. Oil drain sleeve nut; 32. Oil drain valve core; 321. Second sealing groove; 33. Connecting rod; 331. Second fuel flow channel; 34. Polygonal plug; 35. Second sealing ring; 36. Handle. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0026] like Figure 1As shown, according to a specific embodiment of the present invention, a compact self-sealing valve is provided, including: a valve unit 10, the valve unit 10 includes a valve body 11 and a plug 12, the valve body 11 has an oil passage 111, a first accommodating chamber 112 and a second accommodating chamber 113 that are connected, the plug 12 is arranged in the first accommodating chamber 112, the plug 12 is threadedly connected to the valve body 11, and the plug 12 has a first fuel flow passage 121 and a polygonal groove 122; a sealing unit 20, the sealing unit 20 can be selectively installed on the valve body 11, the sealing unit 20 includes a sealing sleeve nut 21 and a sealing valve core 22, when the compact self-sealing valve is in a closed state, the plug 12 is arranged on the upper part of the oil passage 111 to seal the oil passage 111, the sealing valve core 22 is arranged in the second accommodating chamber 113, the sealing sleeve nut 21 is sleeved outside the valve body 11 and is threadedly connected to the valve body 11, and the sealing sleeve nut 21 is used to press the sealing valve core 22; an oil drain unit 30, a drain The oil unit 30 includes an oil drain sleeve nut 31, an oil drain valve core 32, a connecting rod 33 and a polygonal plug 34. The oil drain valve core 32 and the polygonal plug 34 are both arranged on the connecting rod 33. The connecting rod 33 has a second fuel flow channel 331. The oil drain sleeve nut 31 is arranged on the oil drain valve core 32. When the compact self-sealing valve is in the oil drain state, the sealing sleeve nut 21 and the sealing valve core 22 are separated from the valve body 11, and the polygonal plug 34 cooperates with the polygonal groove 122. The oil valve core 32 is arranged in the second accommodating chamber 113, and the oil drain sleeve nut 31 is sleeved on the outside of the valve body 11 and is threadedly connected to the valve body 11. The oil drain sleeve nut 31 is used to compress the oil drain valve core 32. The polygonal plug 34 is rotated by external force to drive the plug 12 to move upward along the axial direction of the valve body 11. The plug 12 is separated from the oil channel 111, and the oil flows out from the oil channel 111 and flows out through the first fuel flow channel 121 and the second fuel flow channel 331 in sequence.

[0027] By applying this configuration, a compact self-sealing valve is provided. The mechanism is achieved by configuring the valve unit 10 to include a valve body 11 and a plug 12. The valve body 11 has a connected oil passage 111, a first accommodating chamber 112 and a second accommodating chamber 113. The plug 12 has a first fuel flow passage 121 and a polygonal groove 122. The sealing unit 20 includes a sealing sleeve nut 21 and a sealing valve core 22. The oil drain unit 30 includes an oil drain sleeve nut 31, an oil drain valve core 32, a connecting rod 33 and a polygonal plug 34. The connecting rod 33 has a second fuel flow passage 331. When the compact self-sealing valve is in a closed state, the plug 12 blocks the oil passage 111, and the sealing sleeve nut 21 presses the sealing valve core 22. When the compact self-sealing valve is in an oil drain state, the oil drain valve core 32 is arranged in the second accommodating chamber 113. The oil drain sleeve nut 31 is used to press the oil drain valve core 32. The plug 12 is separated from the oil passage 111, and the oil flows out of the oil passage 111. This structure is easy to operate, can save the time and operation required for fuel filling and draining, and improve work efficiency; the compact design greatly saves space; the sealing redundancy design greatly ensures the sealing reliability of the fuel system.

[0028] Furthermore, in the present invention, in order to ensure that the micro-oil droplets that may appear at the internal outlet of the pipeline of the valve body 11 are resealed to improve the reliability of the system, the sealing unit 20 also includes a first sealing ring 24, and the sealing valve core 22 has a first sealing groove 221. The first sealing ring 24 is arranged in the first sealing groove 221 to achieve a sealed connection between the sealing valve core 22 and the valve body 11.

[0029] Furthermore, in the present invention, in order to ensure the sealing between the oil drain valve core 32 and the valve body 11, the oil drain unit 30 also includes a second sealing ring 35, the oil drain valve core 32 has a second sealing groove 321, and the second sealing ring 35 is arranged in the second sealing groove 321 to achieve a sealed connection between the oil drain valve core 32 and the valve body 11.

[0030] Furthermore, in the present invention, in order to facilitate the insertion and removal of the sealing valve core 22 , save the time and operation required for fuel filling and draining, and improve work efficiency, the sealing unit 20 also includes a pull ring 23 , which is arranged on the sealing valve core 22 .

[0031] As a first embodiment of the present invention, in order to accelerate the flow of fuel and improve the fuel discharge efficiency, the first fuel flow channel 121 includes a plurality of fuel flow holes, and the plurality of fuel flow holes are evenly spaced along the circumference of the plug 12.

[0032] Alternatively, in the present invention, as a second embodiment of the present invention, the first fuel flow channel 121 can also be configured as an annular fuel flow channel. This method can also accelerate the flow of fuel and improve the fuel discharge efficiency.

[0033] Furthermore, in the present invention, in order to facilitate the installation and use of the oil drain valve core 32 and the polygonal plug 34 , the oil drain unit 30 further includes a handle 36 , which is disposed on the connecting rod 33 .

[0034] Furthermore, in the present invention, in order to facilitate the cooperation between the polygonal plug 34 and the polygonal groove 122, the polygonal plug 34 drives the plug 12 to move upward along the axial direction of the valve body 11, and the plug 12 includes a first cylindrical section 123, a second cylindrical section 124 and a blunt head 125 connected in sequence, and the polygonal groove 122 is arranged on the first cylindrical section 123; in order to achieve a sealed connection between the plug 12 and the valve body 11, the blunt head 125 has an arc-shaped outer surface.

[0035] Furthermore, in the present invention, in order to increase the reliability of the structure, the material strength of the main pressure-bearing part is ensured to be able to withstand a pressure of the order of MPa, and the blunt head 125 is made of metal.

[0036] In order to further understand the present invention, the following Figures 1 to 7 The compact self-sealing valve structure provided by the present invention is described in detail.

[0037] like Figures 1 to 7 As shown, according to a specific embodiment of the present invention, a compact self-sealing valve is provided, and its working principle is as follows:

[0038] When the valve is in the sealed state, the plug 12 is threadedly connected to the valve body 11 to ensure axial compression between the plug 12 and the valve body 11, and a certain pre-tightening force is applied to the blunt end of the plug 12 and the internal outlet of the valve body 11 pipeline to achieve the sealing of the fuel passage. In addition, the axial pre-tightening force is applied to the plug through the threaded connection between the sealing sleeve nut 21 and the valve body 11 to further compress the plug 12 and improve the sealing reliability. The first sealing ring 24 is a redundant design to ensure that the micro-leakage oil droplets that may appear at the internal outlet of the valve body 11 pipeline will be re-sealed to improve the reliability of the system. The first sealing ring 24 is limited by the first sealing groove 221 on the sealing valve core 22. The sealing sleeve nut 21 and the valve body 11 are threadedly connected to compress the sealing valve core 22 to prevent it from slipping outward and protect the internal structure of the valve. The pull ring 23 is used to facilitate the insertion and removal of the sealing valve core 22 for easy operation.

[0039] Through the oil drain unit 30, the valve can be opened to achieve fuel filling and discharge. First, remove the sealing sleeve nut 21 and the sealing valve core 22, and insert the polygonal plug 34 into the polygonal groove 122 to achieve circumferential limitation and realize the subsequent screwing in and out of the thread. Secondly, tighten the oil drain sleeve nut 31 and the thread on the valve body 11. On the one hand, the axial limitation of the oil drain valve core 32 is achieved to ensure sealing; on the other hand, the relative position of the oil drain unit 30 and the valve is fixed. Finally, the oil drain valve core 32 is rotated by rotating the handle 36, and the opening and closing of the internal outlet of the blunt head 125 valve body pipeline is achieved through the axial precession of the thread.

[0040] Fuel path diagram Figure 7 As shown, when the valve is open, the fuel first flows out from the internal outlet of the valve body pipeline, flows through the uniformly distributed circular holes of the plug 12, and then flows to the filling and discharge device through the second fuel flow channel 331 on the connecting rod 33. The specific flow route is as follows Figure 7 shown.

[0041] Compared with the prior art, the present invention has the following innovative features:

[0042] 1Redundant seal design

[0043] The seal at the blunt head 125 and the first seal ring 24 are designed to ensure the reliability of the seal. The axial position of the plug 12 is further ensured by the axial compression between the sealing valve core 22 and the plug 12.

[0044] 2Easy to install

[0045] The invention is convenient to install and use.

[0046] 3. Compact structure

[0047] The maximum outer contour of the valve is only about 43mm in the axial direction and about 28mm in the radial direction, and it can achieve a fuel flow of 4mm in diameter. The structure is very compact and meets the installation requirements of high integration.

[0048] 4. The main pressure-bearing parts use metal plugs to withstand high pressure

[0049] Metal material is used as the main pressure-bearing component at the blunt end 125. The material strength ensures that it can withstand pressure of the MPa order of magnitude, which greatly increases the reliability of the structure.

[0050] In summary, the present invention provides a compact self-sealing valve, which has the following advantages compared with the prior art: This structure is easy to operate, can save time and operation required for fuel filling and draining, and improve work efficiency; the compact design greatly saves space; the sealing redundancy design greatly ensures the sealing reliability of the fuel system.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A compact self-sealing valve, characterized in that: The compact self-sealing valve comprises: A valve unit (10), the valve unit (10) comprising a valve body (11) and a plug (12), the valve body (11) having an oil passage (111), a first accommodating chamber (112) and a second accommodating chamber (113) which are connected to each other, the plug (12) being arranged in the first accommodating chamber (112), the plug (12) being threadedly connected to the valve body (11), and the plug (12) having a first fuel flow passage (121) and a polygonal groove (122); A sealing unit (20), the sealing unit (20) can be selectively mounted on the valve body (11), the sealing unit (20) comprises a sealing sleeve nut (21) and a sealing valve core (22), when the compact self-sealing valve is in a closed state, the plug (12) is arranged at the upper part of the oil passage (111) to block the oil passage (111), the sealing valve core (22) is arranged in the second accommodating chamber (113), the sealing sleeve nut (21) is sleeved outside the valve body (11) and is threadably connected to the valve body (11), and the sealing sleeve nut (21) is used to compress the sealing valve core (22); An oil discharge unit (30), the oil discharge unit (30) comprising an oil discharge outer sleeve nut (31), an oil discharge valve core (32), a connecting rod (33) and a polygonal plug (34), the oil discharge valve core (32) and the polygonal plug (34) are both arranged on the connecting rod (33), the connecting rod (33) has a second fuel flow channel (331), the oil discharge outer sleeve nut (31) is arranged on the oil discharge valve core (32), when the compact self-sealing valve is in an oil discharge state, the sealing outer sleeve nut (21) and the sealing valve core (22) are separated from the valve body (11), the polygonal plug (34) and the polygonal groove (122) are in contact with each other, and the sealing outer sleeve nut (21) and the sealing valve core (22) are separated from each other. In cooperation, the oil drain valve core (32) is arranged in the second accommodating chamber (113), the oil drain sleeve nut (31) is sleeved outside the valve body (11) and is threadedly connected to the valve body (11), the oil drain sleeve nut (31) is used to press the oil drain valve core (32), the polygonal plug (34) is rotated by an external force to drive the plug (12) to move upward along the axial direction of the valve body (11), the plug (12) is separated from the oil channel (111), and the oil flows out from the oil channel (111) and flows out through the first fuel flow channel (121) and the second fuel flow channel (331) in sequence.

2. The compact self-sealing valve according to claim 1, characterized in that: The sealing unit (20) further comprises a first sealing ring (24), the sealing valve core (22) having a first sealing groove (221), and the first sealing ring (24) is arranged in the first sealing groove (221) to achieve a sealed connection between the sealing valve core (22) and the valve body (11).

3. The compact self-sealing valve according to claim 2, characterized in that: The oil discharge unit (30) further comprises a second sealing ring (35), the oil discharge valve core (32) has a second sealing groove (321), and the second sealing ring (35) is arranged in the second sealing groove (321) to achieve a sealed connection between the oil discharge valve core (32) and the valve body (11).

4. The compact self-sealing valve according to claim 3, characterized in that: The sealing unit (20) further comprises a pull ring (23), wherein the pull ring (23) is arranged on the sealing valve core (22).

5. The compact self-sealing valve according to any one of claims 1 to 4, characterized in that: The first fuel flow passage (121) comprises a plurality of fuel flow holes, and the plurality of fuel flow holes are evenly spaced along the circumference of the plug (12).

6. The compact self-sealing valve according to claim 5, characterized in that: The first fuel flow passage (121) is an annular fuel flow passage.

7. The compact self-sealing valve according to claim 1, characterized in that: The oil discharge unit (30) further comprises a handle (36), and the handle (36) is arranged on the connecting rod (33).

8. The compact self-sealing valve according to claim 7, characterized in that: The plug (12) comprises a first cylindrical section (123), a second cylindrical section (124) and a blunt head (125) which are connected in sequence, the polygonal groove (122) is arranged on the first cylindrical section (123), and the blunt head (125) has an arc-shaped outer surface.

9. The compact self-sealing valve according to claim 8, characterized in that: The blunt head (125) is made of metal material.

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