Common rail tube assembly

Abstract

The utility model provides a common rail pipe assembly which comprises an outer layer pipe and an oil leakage point observation component, the outer layer pipe comprises a plurality of outer pipe sections which are arranged at intervals to form a plurality of intervals, and the oil leakage point observation component comprises a sleeve which is arranged outside the outer layer pipe in a sleeved mode. Part of each sleeve is located at the interval between every two adjacent sleeves in the multiple outer pipe sections, and the sleeves are in clearance fit with the two corresponding outer pipe sections. The two sealing element combinations are respectively arranged between the sleeve and the two corresponding outer pipe sections; and the two fixing piece combinations are arranged at the two ends of the sleeve correspondingly and detachably installed on the two corresponding outer pipe sections correspondingly, so that the problems that in the prior art, the mode for judging the fuel leakage point of the common rail pipe is complex, and the judgment result is interfered are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a common rail pipe assembly. Background Art

[0002] In the prior art, a screw plugging structure is generally used to plug the total leakage point of the common rail pipe. However, since there may be multiple leakage points in the fuel high-pressure system, it is impossible to accurately locate the actual leakage point.

[0003] At present, the technology for checking the fuel leakage point of the common rail pipe is to replace the double-layer high-pressure fuel pipe with a single-layer high-pressure fuel pipe at the suspected fuel leakage point. If there is a poor seal between the restrictor and the fuel rail interface, the fuel will leak directly from the high-pressure fuel pipe joint, thereby confirming the fuel leakage point.

[0004] Since the tightening and loosening of the high-pressure oil pipe will also affect the position status of the restrictor and the common rail pipe interface, thereby affecting the sealing effect, when the single-layer high-pressure oil pipe is replaced to find the leak, it will also affect the actual sealing effect and interfere with the judgment of the leak. Even the interface that has been found to be leak-free may also change its original sealing status due to the replacement of the high-pressure oil pipe. Utility Model Content

[0005] The main purpose of the utility model is to provide a common rail pipe assembly to solve the problem that the method for judging the fuel leakage point of the common rail pipe in the prior art is relatively complicated and may interfere with the judgment result.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a common rail pipe assembly, including an outer layer pipe and an oil leakage point observation component, the outer layer pipe includes a plurality of outer pipe sections arranged at intervals to form a plurality of fractures, and the oil leakage point observation component includes: a sleeve, the sleeve is sleeved outside the outer layer pipe, a portion of the sleeve is located at the fracture between two adjacent sleeves in the plurality of outer pipe sections and the sleeve and the corresponding two outer pipe sections are clearance-matched; two sealing component combinations, the two sealing component combinations are respectively arranged between the sleeve and the corresponding two outer pipe sections; two fixing component combinations, the two fixing component combinations are respectively arranged at both ends of the sleeve, and the two fixing component combinations are respectively detachably installed on the corresponding two outer pipe sections.

[0007] Furthermore, the sealing assembly includes a sealing ring, a sealing ring installation groove is provided on the outer pipe section, a part of the sealing ring is located in the sealing ring installation groove and contacts the bottom surface of the sealing ring installation groove, and another part of the sealing ring is located outside the sealing ring installation groove and contacts the inner wall surface of the sleeve.

[0008] Furthermore, there are multiple sealing rings in the sealing assembly, and the multiple sealing rings are arranged in sequence along a direction away from the corresponding fracture.

[0009] Furthermore, the fixing assembly includes an axial retaining ring, a retaining ring mounting groove is provided on the outer pipe section, a part of the axial retaining ring is located in the retaining ring mounting groove and contacts with the groove bottom surface of the retaining ring mounting groove, and another part of the axial retaining ring is located outside the retaining ring mounting groove and contacts with the end face of the sleeve.

[0010] Furthermore, there are multiple axial retaining rings in the fixing member assembly, and the multiple axial retaining rings are arranged in sequence along a direction away from the sleeve.

[0011] Furthermore, the fixing component assembly includes a nut, and the outer pipe section is provided with an external thread for threaded connection with a corresponding nut.

[0012] Furthermore, the fixing component assembly also includes a gasket, which is located on a side of the corresponding nut close to the sleeve.

[0013] Furthermore, the outer pipe section comprises an outer pipe section body and an annular flange arranged on the outer circumferential surface of the outer pipe section body, and the outer circumferential surface of the annular flange is clearance-matched with the inner wall surface of the sleeve.

[0014] Furthermore, there are multiple oil leakage point observation components, and the multiple oil leakage point observation components are arranged in a one-to-one correspondence with the multiple fractures.

[0015] Furthermore, the common rail pipe assembly comprises an inner layer pipe, and the outer layer pipe is sleeved outside the inner layer pipe and is gap-matched with the inner layer pipe.

[0016] By applying the technical solution of the utility model, the common rail pipe assembly of the utility model comprises an outer layer pipe and an oil leakage point observation component, the outer layer pipe comprises a plurality of outer pipe sections which are arranged at intervals to form a plurality of fractures, and the oil leakage point observation component comprises: a sleeve, the sleeve is sleeved outside the outer layer pipe, a portion of the sleeve is located at the fracture between two adjacent sleeves in the plurality of outer pipe sections and the sleeve and the corresponding two outer pipe sections are clearance-matched; two sealing component combinations, the two sealing component combinations are respectively arranged between the sleeve and the corresponding two outer pipe sections; two fixing component combinations, the two fixing component combinations are respectively arranged at both ends of the sleeve, and the two fixing component combinations are respectively detachably mounted on the corresponding two outer pipe sections. In this way, the common rail pipe assembly of the utility model arranges a movable oil leakage point observation component on the outer pipe between the two cylinder interfaces, and the sleeve is arranged on the fracture opened on the outer pipe. The combination of the two fixing parts ensures that the sleeve will not move on the outer pipe under normal working conditions, and the combination of the two sealing parts ensures the seal between the sleeve and the outer pipe. It is only necessary to open the sleeve to observe which fracture side the leakage occurs on, so as to quickly locate the high-pressure fuel leakage point. The operation is simple, and there is no need to replace the high-pressure oil pipe, which avoids the adverse effects of replacing the high-pressure oil pipe, speeds up the fault solving speed, and will not damage the double-tube structure, ensuring a complete sealing effect under normal working conditions. When an abnormal leakage occurs, the leakage situation between the inner and outer pipes can be grasped at the first time, which solves the problem that the method of judging the fuel leakage point of the common rail pipe in the prior art is relatively complicated and will interfere with the judgment result. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A structural schematic diagram of an embodiment of a common rail pipe assembly according to the utility model is shown.

[0019] The above drawings include the following reference numerals:

[0020] 100, outer tube; 110, fracture; 120, outer tube section; 121, outer tube section body; 122, annular flange;

[0021] 200. Oil leakage point observation components; 1. Casing; 2. Sealing assembly; 21. Sealing ring; 3. Fixing assembly; 31. Axial retaining ring. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] like Figure 1 As shown, the utility model provides a common rail pipe assembly, including an outer tube 100 and an oil leakage point observation component 200, the outer tube 100 includes a plurality of outer tube segments 120 arranged at intervals to form a plurality of fractures 110, and the oil leakage point observation component 200 includes: a sleeve 1, the sleeve 1 is sleeved outside the outer tube 100, a portion of the sleeve 1 is located at the fracture 110 between two adjacent sleeves 1 in the plurality of outer tube segments 120, and the sleeve 1 and the corresponding two outer tube segments 120 are both clearance-matched; two sealing component assemblies 2, the two sealing component assemblies 2 are respectively arranged between the sleeve 1 and the corresponding two outer tube segments 120; two fixing component assemblies 3, the two fixing component assemblies 3 are respectively arranged at both ends of the sleeve 1, and the two fixing component assemblies 3 are respectively detachably mounted on the corresponding two outer tube segments 120.

[0024] In this way, the common rail pipe assembly of the utility model is provided with a movable oil leakage point observation component 200 on the outer pipe 100 between the two cylinder interfaces, and the sleeve 1 is sleeved on the fracture 110 opened on the outer pipe 100. The two fixing parts combination 3 ensure that the sleeve 1 will not move on the outer pipe 100 under normal working conditions, and the two sealing parts combination 2 ensure the seal between the sleeve 1 and the outer pipe 100. It is only necessary to open the sleeve 1 and observe which fracture side the leakage occurs on to quickly locate the high-pressure fuel leakage point. The operation is simple, and there is no need to replace the high-pressure oil pipe, which avoids the adverse effects of replacing the high-pressure oil pipe, speeds up the troubleshooting, and does not damage the double-tube structure, ensuring a complete sealing effect under normal working conditions. When an abnormal leakage occurs, the leakage situation between the inner and outer pipes can be grasped at the first time, which solves the problem that the method of judging the fuel leakage point of the common rail pipe in the prior art is relatively complicated and will interfere with the judgment result.

[0025] When the common rail pipe assembly is working normally, the sleeve 1 is sleeved at the fracture 110 between the corresponding two outer pipe sections 120 of the outer layer pipe 100, and the two sides thereof are limited by two fixing component assemblies 3, and the middle is sealed by two sealing component assemblies 2; when it is necessary to check the leakage point, one fixing component assembly 3 is removed from the outer pipe section 120 or one fixing component assembly 3 is moved from the outer pipe section 120 to a position away from the sleeve 1, and then the sleeve 1 is moved on the outer pipe section 120 to expose the corresponding fracture 110, and then the fuel leakage point is checked by observing whether there is fuel leakage at the fracture 110.

[0026] like Figure 1 As shown, the sealing assembly 2 includes a sealing ring 21, and a sealing ring mounting groove is provided on the outer pipe section 120. A part of the sealing ring 21 is located in the sealing ring mounting groove and contacts the bottom surface of the sealing ring mounting groove, and the other part of the sealing ring 21 is located outside the sealing ring mounting groove and contacts the inner wall surface of the sleeve 1.

[0027] Preferably, there are multiple sealing rings 21 in the sealing assembly 2 , and the multiple sealing rings 21 are arranged in sequence along a direction away from the corresponding fracture 110 .

[0028] like Figure 1 As shown, the fixing assembly 3 includes an axial retaining ring 31, and a retaining ring mounting groove is provided on the outer pipe section 120. A part of the axial retaining ring 31 is located in the retaining ring mounting groove and contacts the groove bottom surface of the retaining ring mounting groove, and the other part of the axial retaining ring 31 is located outside the retaining ring mounting groove and contacts the end surface of the sleeve 1.

[0029] Preferably, there are multiple axial retaining rings 31 in the fixing component assembly 3 , and the multiple axial retaining rings 31 are arranged in sequence along a direction away from the sleeve 1 .

[0030] In an embodiment of the present invention not shown in the figure, the fixing component assembly 3 includes a nut, and the outer tube section 120 is provided with an external thread for threaded connection with the corresponding nut.

[0031] In an embodiment of the present invention not shown in the figure, the fixing member assembly 3 further includes a gasket, which is located on a side of the corresponding nut close to the sleeve 1 .

[0032] like Figure 1 As shown, the outer tube section 120 includes an outer tube section body 121 and an annular flange 122 arranged on the outer peripheral surface of the outer tube section body 121, the outer peripheral surface of the annular flange 122 is gap-matched with the inner wall surface of the sleeve 1, and each sealing component assembly 2 and each fixing component assembly 3 are located on the corresponding annular flange 122.

[0033] Preferably, there are multiple oil leakage point observation components 200 , and the multiple oil leakage point observation components 200 are arranged in a one-to-one correspondence with the multiple fractures 110 .

[0034] The common rail pipe assembly of the utility model comprises an inner layer pipe, and an outer layer pipe 100 is sleeved outside the inner layer pipe and is gap-matched with the inner layer pipe.

[0035] Specifically, the outer tube 100 and the inner tube together form a double-tube structure (according to ship regulations, for safety reasons, the high-pressure oil pipe and the common rail pipe adopt this double-tube structure). If there is a fuel leakage point, the fuel will leak into the gap between the outer tube 100 and the inner tube, and leak out along the high-pressure oil pipe at the leakage port of the high-pressure oil pump.

[0036] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0037] The common rail pipe assembly of the utility model includes an outer tube 100 and an oil leakage point observation component 200, the outer tube 100 includes a plurality of outer tube sections 120 arranged at intervals to form a plurality of fractures 110, and the oil leakage point observation component 200 includes: a sleeve 1, the sleeve 1 is sleeved outside the outer tube 100, a portion of the sleeve 1 is located at the fracture 110 between two adjacent sleeves 1 in the plurality of outer tube sections 120, and the sleeve 1 and the corresponding two outer tube sections 120 are both clearance-matched; two sealing component assemblies 2, the two sealing component assemblies 2 are respectively arranged between the sleeve 1 and the corresponding two outer tube sections 120; two fixing component assemblies 3, the two fixing component assemblies 3 are respectively arranged at both ends of the sleeve 1, and the two fixing component assemblies 3 are respectively detachably mounted on the corresponding two outer tube sections 120. In this way, the common rail pipe assembly of the utility model is provided with a movable oil leakage point observation component 200 on the outer pipe 100 between the two cylinder interfaces, and the sleeve 1 is sleeved on the fracture 110 opened on the outer pipe 100. The two fixing parts combination 3 ensure that the sleeve 1 will not move on the outer pipe 100 under normal working conditions, and the two sealing parts combination 2 ensure the seal between the sleeve 1 and the outer pipe 100. It is only necessary to open the sleeve 1 and observe which fracture side the leakage occurs on to quickly locate the high-pressure fuel leakage point. The operation is simple, and there is no need to replace the high-pressure oil pipe, which avoids the adverse effects of replacing the high-pressure oil pipe, speeds up the troubleshooting, and does not damage the double-tube structure, ensuring a complete sealing effect under normal working conditions. When an abnormal leakage occurs, the leakage situation between the inner and outer pipes can be grasped at the first time, which solves the problem that the method of judging the fuel leakage point of the common rail pipe in the prior art is relatively complicated and will interfere with the judgment result.

[0038] 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.

[0039] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. 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, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered 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 that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0040] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0041] 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.

[0042] 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. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0043] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A common rail pipe assembly, It is characterized in that The invention comprises an outer tube (100) and an oil leakage point observation component (200), wherein the outer tube (100) comprises a plurality of outer tube sections (120) arranged at intervals to form a plurality of fractures (110), and the oil leakage point observation component (200) comprises: A sleeve (1), the sleeve (1) being sleeved outside the outer tube (100), a portion of the sleeve (1) being located at the fracture (110) between two adjacent sleeves (1) among the plurality of outer tube sections (120), and the sleeve (1) and the corresponding two outer tube sections (120) being clearance-fitted; Two sealing assemblies (2), the two sealing assemblies (2) being respectively arranged between the sleeve (1) and the corresponding two outer pipe sections (120); Two fixing component assemblies (3), the two fixing component assemblies (3) are respectively arranged at two ends of the sleeve (1), and the two fixing component assemblies (3) are respectively detachably mounted on the corresponding two outer pipe sections (120).

2. The common rail pipe assembly according to claim 1, It is characterized in that The sealing assembly (2) comprises a sealing ring (21), the outer pipe section (120) is provided with a sealing ring installation groove, a portion of the sealing ring (21) is located in the sealing ring installation groove and contacts the bottom surface of the sealing ring installation groove, and another portion of the sealing ring (21) is located outside the sealing ring installation groove and contacts the inner wall surface of the sleeve (1).

3. The common rail pipe assembly according to claim 2, It is characterized in that The sealing rings (21) in the sealing component assembly (2) are multiple in number, and the multiple sealing rings (21) are arranged in sequence in a direction away from the corresponding fracture (110).

4. The common rail pipe assembly according to claim 1, It is characterized in that The fixing assembly (3) comprises an axial retaining ring (31), the outer pipe section (120) is provided with a retaining ring installation groove, a portion of the axial retaining ring (31) is located in the retaining ring installation groove and contacts the groove bottom surface of the retaining ring installation groove, and another portion of the axial retaining ring (31) is located outside the retaining ring installation groove and contacts the end surface of the sleeve (1).

5. The common rail pipe assembly according to claim 4, It is characterized in that The number of the axial retaining rings (31) in the fixing component assembly (3) is multiple, and the multiple axial retaining rings (31) are arranged in sequence along a direction away from the sleeve (1).

6. The common rail pipe assembly according to claim 1, It is characterized in that The fixing component assembly (3) comprises a nut, and the outer tube section (120) is provided with an external thread for threaded connection with the corresponding nut.

7. The common rail pipe assembly according to claim 6, It is characterized in that The fixing component assembly (3) further comprises a gasket, which is located on a side of the corresponding nut close to the sleeve (1).

8. The common rail pipe assembly according to claim 1, It is characterized in that The outer tube section (120) comprises an outer tube section body (121) and an annular flange (122) arranged on the outer peripheral surface of the outer tube section body (121); the outer peripheral surface of the annular flange (122) is clearance-matched with the inner wall surface of the sleeve (1).

9. The common rail pipe assembly according to claim 1, It is characterized in that The number of the oil leakage point observation components (200) is plural, and the plural oil leakage point observation components (200) are arranged in one-to-one correspondence with the plural fractures (110).

10. The common rail pipe assembly according to claim 1, It is characterized in that The common rail pipe assembly comprises an inner layer pipe, and the outer layer pipe (100) is sleeved outside the inner layer pipe and is in clearance fit with the inner layer pipe.

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