Sealing type hydraulic pipe joint

Abstract

The utility model provides a sealed type hydraulic pipe joint which comprises a first protective sleeve, a second protective sleeve, a first clamping ring, a second clamping ring and a pre-tightening mechanism, a communicated through cavity is arranged on the inner side of the first protective sleeve and the inner side of the second protective sleeve, the first protective sleeve is arranged on the outer side of a connector high-pressure piece in a sleeved mode through the through cavity, and the second protective sleeve is arranged on the outer side of the connector high-pressure piece. The hydraulic pipe joint is sleeved with the second protective sleeve, the outer surface of the first protective sleeve is sleeved with the second protective sleeve, a first clamping ring is fixedly arranged on the outer surface of the first protective sleeve, and a second clamping ring is fixedly arranged on the outer surface of the second protective sleeve. According to the scheme, after the hydraulic pipe joint is installed, the hydraulic pipe joint can be applied to the outer side of a high-pressure part by arranging the first protective sleeve and the second protective sleeve in a sleeving mode, and the hydraulic pipe joint in a high-pressure environment is protected; the second protective sleeve moves in the axial direction of the first protective sleeve through the threads on the outer surface of the first protective sleeve and compresses the telescopic spring, the friction force between the second protective sleeve and the threads of the first protective sleeve is increased, and therefore the pre-tightening force is increased, and the sealing performance is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pipe joints, in particular to a sealed hydraulic pipe joint. Background Art

[0002] In the fields of petroleum, chemical industry, mining, etc., high-pressure explosion-proof sealed hydraulic pipe fittings are important equipment components, mainly used to connect hydraulic pipelines to ensure the safe transmission of liquids in pipelines. However, in harsh environments such as high pressure, explosion, and corrosion, traditional hydraulic pipe fittings often have problems such as leakage and sealing failure, which not only affects the normal operation of the equipment, but may also cause safety accidents. Therefore, the development of a high-pressure explosion-proof sealed hydraulic pipe fitting that can work stably in harsh environments such as high pressure, explosion, and corrosion is an important demand in the current technical field. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the utility model provides a sealed hydraulic pipe joint, which solves the problems raised in the above background technology.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a sealed hydraulic pipe joint, comprising a first protective sleeve, a second protective sleeve, a first clamping ring, a second clamping ring and a pre-tightening mechanism, wherein the first protective sleeve and the second protective sleeve are provided with a communicating through cavity on the inner side, the first protective sleeve is sleeved on the outer side of the connector high-pressure part through the through cavity, the second protective sleeve is sleeved on the hydraulic pipe joint, the second protective sleeve is sleeved on the outer surface of the first protective sleeve, a first clamping ring is fixedly provided on the outer surface of the first protective sleeve, a second clamping ring is fixedly provided on the outer surface of the second protective sleeve, and the pre-tightening mechanism is used to provide a pre-tightening force for the connection between the first protective sleeve and the second protective sleeve.

[0007] Preferably, the outer surface of the first protective sleeve is provided with threads, and the second protective sleeve is threadedly connected to the first protective sleeve.

[0008] Preferably, the pre-tightening mechanism includes a first assembly ring, a second assembly ring and an elastic member, the first assembly ring is provided with a first mounting groove, the second assembly ring is provided with a second mounting groove, the first assembly ring is sleeved on the outside of the first retaining ring through the first mounting groove, the second assembly ring is sleeved on the outside of the second retaining ring through the second mounting groove, and the elastic member is arranged between the second assembly ring and the first assembly ring.

[0009] Preferably, the elastic member is a telescopic spring.

[0010] Preferably, the telescopic spring surrounds the outside of the first protective cover.

[0011] (III) Beneficial effects

[0012] The utility model provides a sealed hydraulic pipe joint, which has the following beneficial effects:

[0013] 1. After the hydraulic pipe joint is installed, the first protective cover and the second protective cover are installed so that the hydraulic pipe joint can be applied to the outside of the high-pressure part to protect the hydraulic pipe joint in a high-pressure environment. The second protective cover moves along the axial direction of the first protective cover through the thread on the outer surface of the first protective cover and compresses the telescopic spring, thereby increasing the friction between the second protective cover and the thread of the first protective cover, thereby increasing the preload force and ensuring its sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0016] In the figure: 11, first protective cover; 12, second protective cover; 13, first snap ring; 14, second snap ring; 15, first assembly ring; 16, second assembly ring; 17, first mounting groove; 18, second mounting groove; 20, telescopic spring; 21, through cavity. DETAILED DESCRIPTION

[0017] The utility model provides a sealed hydraulic pipe joint. Figure 1-2 As shown, it includes a first protective cover 11, a second protective cover 12, a first retaining ring 13, a second retaining ring 14 and a pre-tightening mechanism. A communicating through cavity 21 is provided on the inner side of the first protective cover 11 and the second protective cover 12. The first protective cover 11 is sleeved on the outer side of the connector high-pressure part through the through cavity 21. The second protective cover 12 is sleeved on the hydraulic pipe joint. The second protective cover 12 is sleeved on the outer surface of the first protective cover 11. The first retaining ring 13 is fixedly provided on the outer surface of the first protective cover 11. The second retaining ring 14 is fixedly provided on the outer surface of the second protective cover 12. The pre-tightening mechanism is used to provide a pre-tightening force for the connection between the first protective cover 11 and the second protective cover 12.

[0018] The outer surface of the first protective cover 11 is provided with threads, and the second protective cover 12 is threadedly connected to the first protective cover 11 .

[0019] like Figure 2As shown, the preload mechanism includes a first assembly ring 15, a second assembly ring 16 and an elastic member. The first assembly ring 15 is provided with a first mounting groove 17, and the second assembly ring 16 is provided with a second mounting groove 18. The first assembly ring 15 is sleeved on the outside of the first retaining ring 13 through the first mounting groove 17, and the second assembly ring 16 is sleeved on the outside of the second retaining ring 14 through the second mounting groove 18. The elastic member is arranged between the second assembly ring 16 and the first assembly ring 15.

[0020] The elastic member is a telescopic spring 20, and its specifications are determined according to the load, force state, stress magnitude, working temperature, environmental medium, service life, requirements for electrical conductivity and magnetic permeability, process performance, material source and price.

[0021] The telescopic spring 20 surrounds the outer side of the first protective cover 11 .

[0022] The first assembly ring 15 and the second assembly ring 16 are respectively installed on the outside of the first clamping ring 13 and the second clamping ring 14 through interference fit, and the telescopic spring 20 is sleeved on the outside of the first protective sleeve 11, the first protective sleeve 11 is sleeved on the outside of the connector high-pressure part through the through cavity 21, and the second protective sleeve 12 is sleeved on the hydraulic pipe joint, and then the hydraulic pipe joint is installed.

[0023] When the hydraulic pipe joint is installed, the second protective cover 12 is rotated, and the second protective cover 12 moves axially along the first protective cover 11 through the threads on the outer surface of the first protective cover 11 and compresses the telescopic spring 20. During this process, the telescopic spring 20 stores energy through elastic deformation. When the installation is completed, the elastic potential energy of the telescopic spring 20 pushes the second assembly ring 16 away from the first retaining ring 13, thereby increasing the friction between the threads of the second protective cover 12 and the first protective cover 11, thereby increasing the preload force.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealed hydraulic pipe joint, characterized in that: The invention comprises a first protective sleeve (11), a second protective sleeve (12), a first snap ring (13), a second snap ring (14) and a pre-tightening mechanism, wherein a communicating through cavity (21) is provided on the inner side of the first protective sleeve (11) and the second protective sleeve (12), the first protective sleeve (11) is sleeved on the outer side of the connector high-pressure component through the through cavity (21), the second protective sleeve (12) is sleeved on the hydraulic pipe joint, the second protective sleeve (12) is sleeved on the outer surface of the first protective sleeve (11), the first snap ring (13) is fixedly provided on the outer surface of the first protective sleeve (11), the second snap ring (14) is fixedly provided on the outer surface of the second protective sleeve (12), and the pre-tightening mechanism is used to provide a pre-tightening force for the connection between the first protective sleeve (11) and the second protective sleeve (12).

2. A sealed hydraulic pipe joint according to claim 1, characterized in that: The outer surface of the first protective sleeve (11) is provided with threads, and the second protective sleeve (12) is threadedly connected to the first protective sleeve (11).

3. A sealed hydraulic pipe joint according to claim 1, characterized in that: The pre-tightening mechanism comprises a first assembly ring (15), a second assembly ring (16) and an elastic member, wherein a first mounting groove (17) is provided in the first assembly ring (15), a second mounting groove (18) is provided in the second assembly ring (16), the first assembly ring (15) is sleeved on the outer side of the first retaining ring (13) through the first mounting groove (17), the second assembly ring (16) is sleeved on the outer side of the second retaining ring (14) through the second mounting groove (18), and the elastic member is arranged between the second assembly ring (16) and the first assembly ring (15).

4. A sealed hydraulic pipe joint according to claim 3, characterized in that: The elastic member is a telescopic spring (20).

5. A sealed hydraulic pipe joint according to claim 4, characterized in that: The telescopic spring (20) surrounds the outside of the first protective cover (11).

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