Multi-channel sealing joint

Abstract

The utility model discloses a multichannel seal joint, including outer joint (1), sealing gasket (2) and inner joint (3), outer joint (1), sealing gasket (2) and inner joint (3) all have two or three circular channel, and the end face of outer joint (1) sealed with sealing gasket (2) is provided with first circular groove (12) concentric with first circular channel (11), has advantages such as good sealing effect, convenient processing and use.

Description

Technical Field

[0001] The utility model relates to a joint, in particular to a multi-channel sealing joint, belonging to the field of underground foundation construction machinery. Background Art

[0002] Existing drilling machines and other construction equipment have drilling tools and drill rods in single-channel, double-channel and triple-channel forms. For double-channel, triple-channel and other multi-channel forms of drill rods and drill tools, since they often use a pure plane compression sealing structure, the sealing effect of their joints is not ideal and leakage problems often occur. Especially when the circulating medium in the channel reaches a certain pressure, the leakage is more obvious, thereby affecting the construction effect. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model invents a multi-channel sealing joint, which adopts a groove sealing structure to achieve a better sealing effect at the connection, effectively solve the leakage problem at the connection of drill pipes and drill tools, ensure the construction quality, and thus effectively improve the construction efficiency.

[0004] In order to achieve the above invention objectives, the utility model adopts the following technical solutions:

[0005] A multi-channel sealing joint comprises an outer joint 1, a sealing gasket 2 and an inner joint 3. The outer joint 1, the sealing gasket 2 and the inner joint 3 each have two or three circular channels. A first circular groove 12 concentric with the first circular channel 11 is provided on the end surface where the outer joint 1 and the sealing gasket 2 are sealed.

[0006] As a preferred specific implementation manner, a third circular groove 32 concentric with the third circular channel 31 is provided on the end surface where the inner joint 3 and the sealing gasket 2 are sealed.

[0007] As another preferred specific implementation, the cross section of the first circular groove 12 is triangular or U-shaped.

[0008] As another preferred specific implementation, the cross section of the third circular groove 32 is triangular or U-shaped.

[0009] As another preferred specific implementation, there are three first circular channels 11, which are arranged in an equilateral triangle, and a line connecting the centers of two adjacent first circular channels 11 is parallel to one face of the hexagonal joint.

[0010] As another preferred specific embodiment, there are two first circular channels 11, which are arranged in a straight line in the diameter direction of the cylindrical head of the external joint 1, and the line connecting the centers of the two first circular channels 11 is parallel to one surface of the hexagonal joint.

[0011] As another preferred specific implementation, the external joint 1 is an external hexagonal joint with staggered pin grooves, which are semicircular pin grooves; the internal joint 3 is an internal hexagonal joint with staggered pin holes, which are circular pin holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a structural schematic diagram of a multi-channel sealing joint;

[0013] Attached Figure 2 This is a schematic diagram of the staggered arrangement of the pin holes of the inner and outer joints;

[0014] Attached Figure 3 Schematic diagram of channel layout. DETAILED DESCRIPTION

[0015] In the attached Figure 1 The schematic diagram of the multi-channel sealing joint structure shown in the figure includes an outer joint 1, a sealing gasket 2 and an inner joint 3. The outer joint 1, the sealing gasket 2 and the inner joint 3 each have two or three circular channels. A first circular groove 12 concentric with the first circular channel 11 is provided on the end surface where the outer joint 1 and the sealing gasket 2 are sealed. A third circular groove 32 concentric with the third circular channel 31 is provided on the end surface where the inner joint 3 and the sealing gasket 2 are sealed. The cross-sections of the first circular groove 12 and the third circular groove 32 are triangular or U-shaped.

[0016] In the attached Figure 2 and attached Figure 3 In the embodiment shown, the outer joint 1 is an outer hexagonal joint with staggered pin grooves, which are semicircular grooves; the inner joint 3 is an inner hexagonal joint with staggered pin holes, which are circular pin holes. There are three first circular channels 11, which are arranged in an equilateral triangle, and the line connecting the centers of two adjacent first circular channels 11 is parallel to one of the faces in the hexagonal joint. Alternatively, there are two first circular channels 11, which are arranged in a straight line in the diameter direction of the cylindrical head of the outer joint 1, and the line connecting the centers of the two first circular channels 11 is parallel to one of the faces in the hexagonal joint.

[0017] When a circular drill rod or drill bit equipped with an external joint 1 is connected to a circular drill rod equipped with an internal joint 3, the sealing of the connection between the circular channels is achieved by compressing the circular sealing gasket 2. Since a first circular groove 12 concentric with the first circular channel 11 is provided on the end surface where the external joint 1 and the sealing gasket 2 are sealed, or a third circular groove 32 concentric with the third circular channel 31 is provided on the end surface where the internal joint 3 and the sealing gasket 2 are sealed, when the sealing gasket 2 is subjected to the same extrusion force, the deformation of the sealing gasket 2 at the circular groove increases, thereby effectively improving the sealing effect.

[0018] The inner and outer joints are provided with staggered pin grooves and pin holes, the purpose of which is to reduce the influence of the pin grooves and pin holes on the strength of the joint. The first circular channels 11 of the outer joint 1 are arranged in a triangular shape, the purpose of which is to make full use of the limited cross-sectional area of ​​the joint. The line connecting the centers of the two first circular channels 11 is parallel to one of the faces of the hexagonal joint, which is convenient for processing, use and installation.

[0019] The utility model has a simple structure, obvious effect and good promotion value.

Claims

1. A multi-channel sealing joint, comprising an outer joint (1), a sealing gasket (2) and an inner joint (3), wherein the outer joint (1), the sealing gasket (2) and the inner joint (3) each have two or three circular channels, characterized in that A first circular groove (12) concentric with the first circular channel (11) is provided on the end surface of the external joint (1) and the sealing gasket (2) for sealing.

2. The multi-channel sealing joint according to claim 1, characterized in that A third circular groove (32) concentric with the third circular channel (31) is provided on the end surface of the inner joint (3) and the sealing gasket (2) for sealing.

3. The multi-channel sealing joint according to claim 1, characterized in that The cross section of the first circular groove (12) is triangular or U-shaped.

4. The multi-channel sealing joint according to claim 2, characterized in that The cross section of the third circular groove (32) is triangular or U-shaped.

5. The multi-channel sealing joint according to claim 1, characterized in that There are three first circular channels (11) in total, and the three first circular channels (11) are arranged in an equilateral triangle, and a line connecting the centers of two adjacent first circular channels (11) is parallel to a surface in the hexagonal joint.

6. The multi-channel sealing joint according to claim 1, characterized in that There are two first circular channels (11) in total. The two first circular channels (11) are arranged in a straight line in the diameter direction of the cylindrical head of the external joint (1), and the line connecting the centers of the two first circular channels (11) is parallel to a surface in the hexagonal joint.

7. The multi-channel sealing joint according to claim 1 or 2, characterized in that The outer joint (1) is an outer hexagonal joint, on which there are staggered pin grooves, and the pin grooves are semicircular pin grooves; the inner joint (3) is an inner hexagonal joint, on which there are staggered pin holes, and the pin holes are circular pin holes.

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