High-pressure oil pipe
By designing a combined structure of joints, interface pipes, sheaths and lock nuts in the high-pressure oil pipe, the interference fit and secondary seal of the pier head are realized, and the fuel leakage problem caused by the formation of gaps after the high-pressure oil pipe is solved. Improves the reliability of the seal.
Patent Information
- Application Number
- CN202420380121.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The pier structure of the existing high-pressure oil pipe is prone to gaps after long-term bumps and vibration, resulting in fuel leakage.
A high-pressure oil pipe is designed, which includes a joint, an interface pipe, a sheath and a lock nut, which is connected through an interference fit between the pier head and the pier head installation position, and a secondary seal is achieved through the sheath and a lock nut.
It effectively solves the fuel leakage problem caused by the formation of gaps after high-pressure oil pipes after bumps and vibrations, and improves the reliability of sealing by increasing the contact area and reducing the stress of the pipe wall.
Smart Images
Figure CN222478833U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of diesel engines, in particular to a high-pressure oil pipe. Background Art
[0002] The current engine fuel pressure is designed to be relatively large, and the rated pressure of the high-pressure oil pipe is getting higher and higher, and the requirements for the sealing and reliable connection of the joints are getting higher and higher. The existing high-pressure oil pipe, the pier head structure is two spherical surfaces respectively cooperate with the interface pipe and the lock nut, and are pressed to form a seal. This structure is used in the engine of special vehicles. After long-term bumps and vibrations, gaps are prone to occur, resulting in fuel leakage.
[0003] The disclosure of the above background technology content is only used to assist in understanding the utility model concept and technical solution of the utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content
[0004] The utility model aims to provide a high-pressure oil pipe to solve the problem that the existing high-pressure oil pipe has a pier head structure in which two spherical surfaces cooperate with an interface pipe and a locking nut respectively and are compressed to form a seal. This structure is applied to the engine of a special vehicle and is prone to gaps that lead to fuel leakage after long-term bumps and vibrations.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0006] A high-pressure oil pipe, characterized in that it comprises a joint, an interface pipe, a sleeve and a locking nut, wherein the upper part of the joint is a joint pipe and the lower part is a pier head, and the middle part of the pier head is provided with a limit end; the middle part of the interface pipe is provided with a pier head installation position, the upper part of the pier head installation position is provided with a sleeve embedding cavity, and the outside of the interface pipe is provided with an external thread; the lower part of the sleeve is provided with a stop end, and the bottom of the stop end is provided with a pier head positioning cavity; the upper part of the locking nut is provided with a locking end; the joint is connected to the interface pipe, the sleeve is connected to the joint, and the locking nut is inserted into the sleeve and the joint pipe to connect with the interface pipe to lock the joint and the interface pipe.
[0007] Furthermore, the limiting end surrounds the pier head.
[0008] Furthermore, the joint and the interface pipe are connected by interference fit between the pier head and the pier head mounting position.
[0009] Furthermore, the stop end of the sheath is embedded in the sheath embedding cavity.
[0010] Furthermore, the locking end of the locking nut is connected to the upper portion of the stop end.
[0011] Compared with the prior art, the advantages and beneficial effects of the utility model are:
[0012] 1. A sheath is arranged inside the high-pressure oil pipe of the utility model, and the pier head of the joint is connected with the pier head mounting position of the interface pipe by means of interference fit to form a seal; at the same time, the stop end of the sheath is embedded in the sheath embedding cavity and contacts with the limit end, and the locking nut is inserted into the sheath and the joint pipe and connected with the external thread of the interface pipe to lock the sheath, the joint and the interface pipe, thereby realizing secondary sealing and solving the problem that the existing high-pressure oil pipe is prone to gaps and fuel leakage after long-term bumps and vibrations.
[0013] 2. After the utility model uses the sheath, the outer diameter is enlarged, and the sheath and the locking nut are in contact, which increases the contact area, can reduce the stress on the pipe wall, and improve reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a cross-sectional view of the fitting of the connector and the sheath of the utility model;
[0015] Figure 2 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0016] The present invention is further described in detail below in conjunction with specific implementations. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.
[0017] like Figure 1 and 2As shown, a high-pressure oil pipe is characterized in that it includes a joint 1, an interface pipe 2, a sleeve 3 and a locking nut 4. The upper part of the joint 1 is a joint pipe 5, and the lower part is a pier head 6. The middle part of the pier head 6 is provided with a limiting end 7, and the limiting end 7 surrounds the pier head; the middle part of the interface pipe 2 is provided with a pier head installation position 8, and the upper part of the pier head installation position 8 is provided with a sleeve embedding cavity 9 for installing the secondary seal of the sleeve, and the outer part of the interface pipe 2 is provided with an external thread 10; the lower part of the sleeve 3 is provided with a stop end 11, and the stop end 11 of the sleeve 3 is embedded in the sleeve embedding cavity 9 to play a sealing and excessive shock absorbing role. After the sleeve 2 is used, the outer diameter is increased, and the sleeve 3 and the locking nut 4 are connected. The locking end 12 contacts the pipe wall to increase the contact area, reduce the stress on the pipe wall, and improve reliability. A pier head positioning cavity 13 is provided at the bottom of the stop end 11 for cooperating with the upper part of the pier head 6; a locking end 12 is provided in the upper part of the locking nut 4, and the locking end 12 of the locking nut 4 is connected to the upper part of the stop end 11 to lock the sleeve 3 to achieve sealing; the joint 1 is connected to the interface pipe 2, and the joint 1 and the interface pipe 2 are connected by an interference fit between the pier head 6 and the pier head mounting position 8, the sleeve 3 is connected to the joint 1, and the locking nut 4 is inserted into the sleeve 3 and the joint pipe 5 is connected to the interface pipe 2 to lock the joint 1 and the interface pipe 2.
[0018] The utility model provides a sheath 3 in the high-pressure oil pipe, and the pier head 6 of the joint 1 is connected with the pier head mounting position 8 of the interface pipe 2 by means of interference fit to form a seal; at the same time, the stop end 11 of the sheath 3 is embedded in the sheath embedding cavity 9 and contacts the limit end 7, and the locking nut 2 is inserted into the sheath 3 and the joint pipe 5 and connected with the external thread 10 of the interface pipe 2 to lock the sheath 3 and the joint 1 and the interface pipe 2, so as to achieve secondary sealing, and solve the problem that the existing high-pressure oil pipe is prone to gaps and fuel leakage after long-term bumps and vibrations.
[0019] The above contents are further detailed descriptions of the present invention in combination with specific / preferred implementations, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can also make several substitutions or modifications to the described embodiments without departing from the concept of the present invention, and these substitutions or modifications should be deemed to belong to the protection scope of the present invention.
Claims
1. A high-pressure oil pipe, characterized in that: It includes a joint, an interface pipe, a sleeve and a locking nut. The upper part of the joint is a joint pipe and the lower part is a pier head. A limiting end is provided in the middle of the pier head. A pier head installation position is provided in the middle of the interface pipe, a sleeve embedding cavity is provided in the upper part of the pier head installation position, and an external thread is provided on the outside of the interface pipe. A stop end is provided at the lower part of the sleeve, and a pier head positioning cavity is provided at the bottom of the stop end. A locking end is provided in the upper part of the locking nut. The joint is connected to the interface pipe, the sleeve is connected to the joint, and the locking nut is inserted into the sleeve and the joint pipe to connect with the interface pipe to lock the joint and the interface pipe.
2. A high pressure oil pipe according to claim 1, characterized in that: The limiting end surrounds the pier head.
3. A high pressure oil pipe according to claim 1, characterized in that: The joint and the interface pipe are connected by interference fit between the pier head and the pier head installation position.
4. A high pressure oil pipe according to claim 1, characterized in that: The stop end of the sheath is embedded in the sheath embedding cavity.
5. The high-pressure oil pipe according to claim 1, characterized in that: The locking end of the locking nut is connected to the upper part of the stop end.