CN214405079U

CN214405079U - Lip type sealing joint

Info

Publication number: CN214405079U
Application number: CN202120505211.6U
Authority: CN
Inventors: 李岩峰; 张国栋
Original assignee: Shandong Longkou Special Rubber Hose Co ltd
Current assignee: Shandong Longkou Special Rubber Hose Co ltd
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2021-10-15
Anticipated expiration: 2031-03-10

Abstract

The utility model provides a lip type sealing joint, which comprises a hollow core bar and a sleeve, wherein one end of the sleeve is sleeved outside the core bar, one end of a rubber tube is clamped between the core bar and the sleeve, a rubber cutting ring is arranged at the joint of the outer side of the core bar and the end part of the rubber tube, and the ring edge of the rubber cutting ring is cut into the tube wall of the rubber tube; the core rod is divided into a tail part, a middle part and a head part along the axial direction, one end of the sleeve is arranged at the transition position of the tail part and the middle part, an anti-falling groove is arranged on the inner side of the sleeve, and the other end of the sleeve extends to the outside of the head part to form an extension part. The sealing joint in the utility model can meet the sealing requirement of high flow without increasing the wall thickness of the core rod, thereby realizing the technical effect of improving the sealing capacity of the sealing joint while increasing the fluid flow; the outer layer of the head part of the core rod is provided with an annular groove, an O-shaped ring or liquid absorbing sponge can be arranged in the annular groove, the flow of fluid in the gap between the core rod and the inner rubber layer can be blocked or slowed down, and the technical effect of improving the sealing capacity of the sealing joint is realized.

Description

Lip type sealing joint

Technical Field

The utility model relates to a rubber tube connects sealed field, especially indicates a lip sealing joint.

Background

A hose assembly is an auxiliary device commonly used in hydraulic systems. It is made up by using high-pressure steel wire to weave or wind rubber pipe and steel piece joint through the processes of fastening and pressing by means of special-purpose equipment, and is used for connecting various hydraulic elements in hydraulic system, and is mainly used for making hydraulic power transmission or transmitting high-pressure medium of water, gas and oil so as to ensure circulation of liquid and transfer liquid energy, including rubber pipe (or hard pipe), sealing element and connecting fittings (such as joint and flange).

The joint is generally composed of a core rod and an outer sleeve, the traditional rubber tube assembly needs to realize sealing by pressing a rubber tube lining layer on the core rod through extruding the outer sleeve, the core rod is required to have certain strength and supporting force, the core rod needs to be realized by increasing the wall thickness of a sealing structure part of the core rod for the higher strength requirement of the core rod, and the inner hole of the joint is smaller than the inner hole of the rubber tube and is not suitable for occasions with higher requirements on flow. Therefore, it is necessary to develop a sealing joint that can provide a high sealing capability and ensure that the inner diameter of the core rod can meet the requirement of a large flow rate, so as to promote the development of industrial production.

SUMMERY OF THE UTILITY MODEL

The utility model discloses in developed a lip formula sealing joint, establish the sleeve outside the core bar including hollow core bar and cover, the core bar head is the round platform form, and be interference fit with rubber tube inner rubber layer, the core bar head outside is provided with cuts the gluey ring, when core bar head extrusion gets into rubber tube inner rubber layer, cut the rubber ring and cut into inner rubber layer, it forms the lip to be cut the glued membrane, the head that has certain tapering sticiss the lip glue film that cuts on the core bar surface, and simultaneously, the sleeve compresses tightly in the rubber tube casing ply outside, the double sealing ability has been realized, the sealing effect has been strengthened, can satisfy the higher user demand of flow.

A lip type sealing joint comprises a hollow core rod and a sleeve, wherein the sleeve is sleeved outside the core rod, a rubber tube is clamped between the core rod and the sleeve, and the lip type sealing joint is characterized in that a rubber cutting ring is arranged on the outer side of the core rod and at the joint of the end part of the rubber tube, and the ring edge of the rubber cutting ring is embedded into the tube wall of the rubber tube.

The core rod is divided into a tail part, a middle part and a head part along the axial direction, one end of the sleeve is arranged at the transition position of the tail part and the middle part, an anti-falling groove is arranged on the inner side close to the end, and the other end of the sleeve extends to the outside of the head part to form an extension part.

The rubber cutting ring is arranged at the transition position of the middle part and the head part, and the edge of the rubber cutting ring is in a flat annular blade shape.

The rubber tube includes interior glue film, casing ply and outer glue film and distributes from inside to outside in proper order, the casing ply lateral surface with the sleeve is inboard to be connected, the interior tip of casing ply inlays to be established in the anticreep inslot, the outer end of casing ply with be provided with between the sleeve is inboard outer glue film, interior glue film cover is established the head outside, cut gluey ring and cut into in the interior glue film and constitute lip seal structure.

The outer diameter of the head part is gradually reduced along the direction of the outer rubber layer, and a plurality of annular grooves are coaxially arranged on the outer side surface of the head part.

And an O-shaped ring is arranged in the annular groove.

And a liquid absorption sponge is arranged in the annular groove.

The utility model discloses the technological effect who reaches:

(1) the rubber cutting ring is arranged outside the core rod, the rubber cutting ring can cut into the rubber tube inner rubber layer, the head part with certain taper of the core rod extrudes the cut inner rubber layer on the core rod, the sealing requirement of high flow can be met without increasing the wall thickness of the core rod, and the technical effect of improving the sealing capacity of the sealing joint while increasing the fluid flow is realized;

(2) the annular groove arranged on the outer layer of the head part of the core rod in the utility model can slow down the flow of fluid in the gap between the core rod and the inner glue layer, thereby realizing the technical effect of improving the sealing capacity of the sealing joint;

(3) the utility model provides an inside O type circle or the imbibition sponge of setting up of ring channel can block or slow down the flow of fluid in core bar and interior glue film gap, has realized improving the technological effect of sealing joint sealing ability.

Drawings

Fig. 1 is a schematic view of the connection between the middle lip type sealing joint and the rubber pipe of the present invention.

Fig. 2 is an enlarged view of a portion of the structure at a.

Fig. 3 is a schematic view of the middle lip type sealing joint of the present invention.

Fig. 4 is a cross-sectional view of the middle lip type sealing joint of the present invention.

Wherein the reference numerals are: 1. a core bar; 2. a sleeve; 10. a tail portion; 11. a middle part; 12. a head portion; 13. An extension portion; 21. a drop-proof groove; 121. cutting a rubber ring; 122. an annular groove; 3. an inner glue layer; 4. a framework layer; 5. and an outer glue layer.

Detailed Description

In order to deepen the understanding of the present invention, the lip seal according to the present invention will be described in detail with reference to the following examples and drawings, and this embodiment is only used to explain the present invention, and does not limit the scope of the present invention.

A lip type sealing joint comprises a hollow core rod 1 and a sleeve 2, wherein one end of the sleeve 2 is sleeved outside the core rod 1, one end of a rubber pipe is clamped between the core rod 1 and the sleeve 2, a rubber cutting ring 121 is arranged on the outer side of the core rod 1 and at the joint of the outer side of the core rod and the end of the rubber pipe, and the ring edge of the rubber cutting ring 121 is cut into the pipe wall of the rubber pipe.

The core bar 1 is divided into a tail part 10, a middle part 11 and a head part 12 along the axial direction, one end of the sleeve 2 is arranged at the transition position of the tail part 10 and the middle part 11, an anti-falling groove 21 is arranged on the inner side of the sleeve, the other end of the sleeve extends to the outside of the head part 12 to form an extension part 13, the other end of the sleeve is sleeved on the outer side of the outer rubber layer 5, the extension part 13 can ensure that the joint of the rubber pipe and the core bar 1 is not bent, and the risk of leakage of the rubber pipe caused by bending is reduced.

The glue cutting ring 121 is provided at the transition between the central portion 11 and the head portion 12 and has a flat annular blade-like edge.

The outer side face of a framework layer 4 at one end of the rubber tube is connected with the inner side of the sleeve 2, the end part of the framework layer 4 is arranged in the anti-falling groove 21, the rubber tube can be prevented from slipping from a gap between the core rod and the sleeve, an inner rubber layer 3 at one end of the rubber tube is sleeved on the outer side of the head part 12, the rubber cutting ring 121 is cut into the inner rubber layer 3, and the cut inner rubber layer 3 forms a lip-shaped sealing structure.

The outer diameter of the head 12 is gradually reduced, and the outer side surface of the head is coaxially provided with a plurality of annular grooves 122, and the annular grooves 122 can delay the flow of fluid between the core bar 1 and the inner glue layer 3.

An O-shaped ring is arranged in the annular groove 122, and can block fluid from flowing between the core rod 1 and the inner rubber layer 3, so that the sealing capacity of the sealing joint can be improved.

The annular groove 122 is internally provided with the liquid absorbing sponge which can absorb fluid flowing between the core bar 1 and the inner glue layer 3, so that the sealing capability of the sealing joint can be improved.

The use of the rubber tube comprises the steps that firstly, the outer rubber layer 5 and the inner rubber layer 3 are respectively stripped from one end of the rubber tube, the core bar 1 is pushed hydraulically, the head 12 is extruded into the rubber tube, the rubber cutting ring 121 is cut into the inner rubber layer 3, the sleeve 2 is sleeved on the framework layer 4 to be subjected to cold extrusion, and the framework layer 4 is tightly pressed on the core bar 1 by the sleeve 2.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a lip formula sealing joint, includes hollow core bar (1) and a pot head establish sleeve (2) outside core bar (1), core bar (1) with it is equipped with the rubber tube to press from both sides between sleeve (2), its characterized in that, the core bar (1) outside and with the department that meets of rubber tube tip is provided with cuts rubber ring (121), the ring limit embedding of cutting rubber ring (121) is in the rubber tube pipe wall.

2. A lip seal according to claim 1, characterized in that the core rod (1) is divided in the axial direction into a tail part (10), a middle part (11) and a head part (12), and that the sleeve (2) is arranged with one end at the transition between the tail part (10) and the middle part (11) and with an anti-slip groove (21) near the inner side of the end and with the other end extending outside the head part (12) and forming an extension (13).

3. A lip seal according to claim 2, wherein the cutting ring (121) is arranged at the transition between the central part (11) and the head part (12) and has a flat annular blade-like edge.

4. The lip type sealing joint according to claim 3, wherein the rubber pipe comprises an inner rubber layer, a framework layer and an outer rubber layer which are sequentially distributed from inside to outside, the outer side surface of the framework layer (4) is connected with the inner side of the sleeve (2), the inner end of the framework layer (4) is embedded in the anti-falling groove (21), the outer rubber layer is arranged between the outer end of the framework layer and the inner side of the sleeve, the inner rubber layer (3) is sleeved on the outer side of the head (12), and the rubber cutting ring (121) is cut into the inner rubber layer (3) and forms a lip-shaped sealing structure.

5. A lip seal according to claim 4, wherein the outer diameter of the head (12) tapers in the direction of the outer layer and is provided with a plurality of annular grooves (122) coaxially on the outer side.

6. A lip seal according to claim 5, wherein an O-ring is mounted in the annular groove (122).

7. A lip seal according to claim 6, wherein a suction sponge is mounted in the annular groove (122).