Dual sealing device for high-pressure pipeline in automobile engine

An automobile engine, medium and high pressure technology, which is applied in the direction of mechanical equipment, pipes/pipe joints/fittings, flange connections, etc. It can solve problems such as leakage at the interface and affect the service life of the workpiece, so as to prevent leakage risks and strong self-adaptive ability , The effect of reducing the risk of leakage

Pending Publication Date: 2018-10-02
江苏腾驰科技有限公司
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AI-Extracted Technical Summary

Problems solved by technology

However, there are still defects in the current existing technology. Since the sealing device has been in a high-temperature and high-pressure environment for a...
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Abstract

The invention relates to a pipeline connector sealing device, in particular to a dual sealing device for a high-pressure pipeline in an automobile engine. The dual sealing device comprises an upset head type through-connection device, a double thread connector, a locking nut, a flange plate A and a flange plate B. The upset head type through-connection device and the double thread connector are ina dual sealing connection relation after the locking nut is tightened, preliminary seal is formed through a concave hole and an upset head, secondary seal is formed between a spherical step and a protrusion, and the self-adaptation capability between matched faces is high so that the oil pipe leakage risk can be reduced. The flange plate A and the flange plate B have a locking strengthening function on the locking nut, the sealing effect between the upset head type through-connection device and the double thread connector is guaranteed, and after long-time usage, the fine adjustment functioncan be achieved; and the leakage risks after long-time usage are prevented, the flange plate A and the flange plate B can be matched with rubber gaskets, and the sealing strengthening effect is achieved at the two ends of the locking nut.

Application Domain

Technology Topic

High pressureSelf adaptation +4

Image

  • Dual sealing device for high-pressure pipeline in automobile engine
  • Dual sealing device for high-pressure pipeline in automobile engine

Examples

  • Experimental program(2)

Example Embodiment

[0021] Example 1:
[0022] Such as figure 1 As shown, a dual sealing device for high-pressure pipelines in an automobile engine includes a pier-head adapter 1, a double-threaded joint 2, a lock nut 3, a flange A4 and a flange B5. The pier head adapter device 1 includes a tube body with a hollow structure, one end of the tube body has a pier head 6 structure, and the other end is connected with a high-pressure pipeline, and the tail end of the pier head 6 has a spherical step 8; The double-threaded joint 2 has a hollow structure, one end surface of which is provided with a concave hole 7 that is matched with the pier 6 of the pier-head adapter device 1, and the recessed hole 7 and the pier 6 can realize relative rotation between the two A flange plate A4 is sleeved on the external thread of the end; the locking nut 3 is coaxially sleeved on the pipe body of the pier-type adapter device 1, and the internal thread of the locking nut 3 and the double-threaded joint 2 In cooperation, the inner wall of the lock nut 3 is provided with a protrusion 9 at one end away from the pier head 6, and the mating surface of the protrusion 9 and the spherical step 8 is a conical surface, and the lock nut 3 is away from the pier head 6 A flange B5 is provided on one side of the A4, the flange B5 is coaxially sleeved on the pipe body of the pier-head adapter device 1, and the flange A4 and the flange B5 are fixedly matched by bolts.
[0023] Wherein, the mating surfaces of the flange A4 and the flange B5 respectively and the lock nut 3 are provided with rubber gaskets 10.
[0024] The concave hole 7 is of a flaring type, the included angle of the conical surface is 65 degrees, and the front end of the pier 6 is an involute pier surface.
[0025] The mating surface of the protrusion 9 and the spherical step 8 is a tapered surface, and the included angle of the tapered surface is 55 degrees.
[0026] The pier head adapter 1, the double-threaded joint 2, and the lock nut 3 are all made of titanium alloy material.
[0027] It is worth noting that in another solution of the present invention, the front end of the pier head adopts an elliptical pier head surface. Since the elliptic curve is similar to the involute curve, the specific processing can be carried out according to actual needs, and no separate description of additional embodiments is required. The front end of the pier head adopts an elliptical pier head surface.

Example Embodiment

[0028] Example 2:
[0029] Such as figure 2 , A dual sealing device for high-pressure pipelines in automobile engines, comprising a pier-head adapter device 1, a double threaded joint 2, a lock nut 3, a flange A4 and a flange B5, wherein the pier The head adapter device 1 includes a tube body with a hollow structure. One end of the tube body has a pier 6 structure, and the other end is connected with a high-pressure pipeline. The tail end of the pier 6 has a spherical step 8; The threaded joint 2 has a hollow structure, in which one end surface is provided with a recessed hole 7 that matches with the pier 6 of the pier-head adapter device 1, and the recessed hole 7 and the pier 6 have a cooperation that can realize the relative rotation of the two The outer thread of this end is sleeved with a flange A4; the lock nut 3 is sleeved coaxially on the pipe body of the pier-type adapter 1, and the inner thread of the lock nut 3 is matched with the double thread joint 2. , The inner wall of the lock nut 3 is provided with a protrusion 9 at one end away from the pier 6, and the mating surface of the protrusion 9 and the spherical step 8 is a conical surface, and the lock nut 3 is far away from the pier 6 A flange plate B5 is arranged on the side, and the flange plate B5 is coaxially sleeved on the pipe body of the pier-head adapter device 1, and the flange plate A4 and the flange plate B5 are fixedly matched by bolts.
[0030] Wherein, the mating surfaces of the flange A4 and the flange B5 respectively and the lock nut 3 are provided with rubber gaskets 10.
[0031] The concave hole 7 is an embedded spherical surface, and the front end of the pier 6 is a spherical pier surface.
[0032] The mating surface of the protrusion 9 and the spherical step 8 is a tapered surface, and the included angle of the tapered surface is 55 degrees.
[0033] The pier head adapter 1, the double-threaded joint 2, and the lock nut 3 are all made of titanium alloy material.
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Description & Claims & Application Information

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