Polyethylene composite pipe connection structureTechnical Field
The invention relates to a connecting piece, in particular to a polyethylene composite pipe connecting structure.
Background
The polyethylene composite pipe is polymerized by monomer ethylene, and polyethylene with different densities can be obtained due to different polymerization reaction conditions such as pressure, temperature and the like during polymerization. When processing PE pipes of different types, resin brands are selected according to different application conditions, and meanwhile, requirements on an extruder and a die are different, so that the performances of the obtained PE composite pipe are naturally different. The good pipeline has good economical efficiency, and has a series of advantages of stable and reliable interface, impact resistance, cracking resistance, aging resistance, corrosion resistance and the like, so that the pipeline is widely applied in actual life, and a connecting piece for a polyethylene composite pipe is very important.
Disclosure of Invention
The invention aims to provide a polyethylene composite pipe connecting structure, which solves the problems that the existing pipeline is easy to fall off and easy to axially displace only by using a sealing ring interface.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a compound union coupling of polyethylene, includes connecting pipe and the compound pipe of polyethylene, the inner wall at connecting pipe both ends is provided with the resistance wire that generates heat respectively, the resistance wire that generates heat is connected with the electric welding terminal that is located outside the connecting pipe, be provided with T shape spacing collar between two sets of resistance wires that generate heat, T shape spacing collar constitutes the spacing groove that two opening directions are opposite with the connecting pipe, be provided with rubber seal in the spacing groove of U-shaped. Through double matching of the electric melting and the rubber ring, the firmness and the tightness of connection between pipelines are enhanced.
Preferably, the T-shaped limit ring and the connecting pipe are integrally formed, so that the firmness of the T-shaped limit ring and the connecting pipe is improved.
Preferably, the rubber sealing ring is a water-swelling rubber ring, so that the sealing performance is better.
Preferably, the width of the limiting groove is gradually reduced from the groove bottom to the groove opening, the groove opening has a certain clamping effect on the tail end of the composite pipe, the clamping effect has a component force pushing the tail end of the composite pipe into the limiting groove, and the axial displacement is avoided to a certain extent.
Preferably, one side of the rubber sealing ring, which is close to the opening of the limiting groove, is provided with two extrusion rings, and the two extrusion rings are respectively arranged along the groove wall of the limiting groove.
The tail end of the composite pipe is positioned between the two extrusion rings, so that the sealing effect is enhanced.
Preferably, the width of the extrusion ring gradually decreases along the direction approaching to the opening of the limit groove.
The guiding function is achieved, and the obstruction of the extrusion ring to the composite pipe when the pipe wall of the composite pipe stretches into the space between the two extrusion rings is reduced.
Preferably, a propping ring is arranged in the limiting groove along the middle of the groove bottom.
The support ring has extremely important effect, when the pipe wall of the composite pipe stretches into the space between the two extrusion rings, the extrusion rings can give the rubber sealing ring a force towards the bottom of the limiting groove, and the sealing ring can generate a restoring force under the elastic effect, so that the sealing ring and the composite pipe can be sealed, and the rubber ring cannot bear excessive pressure for a long time so as to deform or reduce the elastic force, thereby prolonging the service life of the connecting piece.
Preferably, the width of the abutment ring gradually decreases along the direction approaching the opening of the limit groove.
The polyethylene composite pipe matched with the polyethylene composite pipe connecting piece is provided with a connecting ring at least at one end, and the connecting ring is positioned in the U-shaped limit groove and is matched with the size and shape of the limit groove.
The connecting ring can be integrated into one piece with the compound pipe, stretches into the spacing groove and along the direction of keeping away from the tank bottom, and thickness reduces gradually, and the spacing groove mutually support, and the spacing groove plays the effect of centre gripping connecting ring, reduces the axial displacement of compound pipe to a certain extent simultaneously.
Preferably, the end face of the connecting ring is provided with a pressurizing groove in the circumferential direction, and the width of the pressurizing groove from the groove bottom to the notch is gradually increased. The shape of the pressurizing groove can be matched with the bottom ring, so that the sealing ring between the pressurizing groove and the bottom ring is tightly attached to the pressurizing groove and the bottom ring, in addition, the sealing ring is in self elasticity, and the outer ring and the inner ring have elasticity close to the connecting ring, so that the sealing performance between the two is better.
Compared with the prior art, the invention has the beneficial effects that at least one of the following is adopted:
The limit in the connecting pipe is T-shaped, and two water-swelling rubber rings are embedded in T-shaped openings on two sides of the limit. The connecting piece adopts double sealing, including hot melt sealing and rubber ring sealing, thereby fundamentally preventing the penetration force of water pressure on the pipe wall and the pipe fitting and the influence of direct contact of steel wires and liquid on water and liquid. The rubber ring connection and electric melting connection process is combined, and the pipe fittings are welded into a whole by electric melting, so that the defects of easiness in falling off, low sedimentation load, easiness in axial displacement, poor water-resistant thrust and low bearing pressure of a single rubber ring connector are overcome.
The outside combines the electric hot melting chain to solve the influence of complex soil environment on the service life of the rubber ring. The double water-swelling rubber ring overcomes the defect that the common electric hot melting is easy to cause local virtual melting. The rubber ring and the electric melting sealing measures are combined, so that stronger performance complementation is achieved, the defects of the rubber ring and the electric melting sealing measures are overcome, and the interface safety of a pipeline system is greatly improved by matching with the anti-displacement safety limit of a brand new design.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the limiting groove and the sealing ring of the present invention.
FIG. 3 is a schematic structural view of a composite tube according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1:
The embodiment provides a polyethylene composite pipe connection structure, including connecting pipe 1, the inner wall at connecting pipe 1 both ends is provided with heating resistor wire 4 respectively, heating resistor wire 4 is connected with the electric welding terminal 41 that is located the connecting pipe 1 outside, be provided with T shape spacing collar 2 between two sets of heating resistor wires 4, T shape spacing collar 2 constitutes spacing groove 5 that two opening directions are opposite with connecting pipe 1, be provided with rubber seal 3 in the spacing groove 5 of U-shaped. Through double matching of the electric melting and the rubber ring, the firmness and the tightness of connection between pipelines are enhanced.
Example 2:
This embodiment further defines, on the basis of embodiment 1: the T-shaped limit ring 2 and the connecting pipe 1 are integrally formed, so that the firmness of the T-shaped limit ring and the connecting pipe is improved.
Example 3:
This embodiment further defines, on the basis of embodiment 1: the rubber sealing ring 3 is a water-swelling rubber ring, and has better tightness.
Example 4:
This embodiment further defines, on the basis of embodiment 1: the width of the limiting groove 5 is gradually reduced from the groove bottom to the groove opening, the groove opening has a certain clamping effect on the tail end of the composite pipe, the clamping effect has a component force pushing the tail end of the composite pipe into the limiting groove 5, and the occurrence of axial displacement is avoided to a certain extent.
Example 5:
This embodiment further defines, on the basis of embodiment 1: one side of the rubber sealing ring 3, which is close to the opening of the limit groove 5, is provided with two extrusion rings 31, and the two extrusion rings 31 are respectively arranged along the groove wall of the limit groove 5.
The end of the composite tube is located between two squeeze rings 31 to enhance the sealing effect.
Example 6:
this embodiment further defines, on the basis of embodiment 5: the width of the extrusion ring 31 gradually decreases along the direction approaching the opening of the limit groove 5.
Plays a role of guiding, and reduces the obstruction of the extrusion ring 31 to the composite pipe when the pipe wall of the composite pipe stretches into the space between the two extrusion rings 31.
Example 7:
this embodiment further defines, on the basis of embodiment 1: an abutting ring 11 is arranged in the limiting groove 5 along the middle of the groove bottom.
The supporting ring 11 has extremely important function, when the pipe wall of the composite pipe stretches into the space between the two extrusion rings 31, the extrusion rings 31 can provide a force for the rubber sealing ring 3 towards the bottom of the limiting groove 5, and the sealing ring 3 can generate a restoring force under the elastic function, so that the sealing ring 3 and the composite pipe can be sealed, and the rubber ring cannot bear excessive pressure for a long time so as to deform or reduce the elastic force, thereby prolonging the service life of the connecting piece.
Example 8:
This embodiment further defines, on the basis of embodiment 7: the width of the supporting ring 11 gradually decreases along the direction approaching to the opening of the limit groove 5.
Example 9:
The embodiment provides a polyethylene composite pipe matched with the polyethylene composite pipe connecting piece, at least one end of the polyethylene composite pipe is provided with a connecting ring 61, and the connecting ring 61 is positioned in the U-shaped limit groove 5 and is matched with the size and the shape of the limit groove 5.
The connecting ring 61 can be integrally formed with the composite pipe, stretches into the limiting groove 5 and gradually reduces in thickness along the direction away from the groove bottom, and is matched with the limiting groove 5, the limiting groove 5 plays a role in clamping the connecting ring 61, and meanwhile axial displacement of the composite pipe is reduced to a certain extent.
Example 10:
This embodiment further defines, on the basis of embodiment 9: the end face of the connection ring 61 is provided with a pressing groove 62 in the circumferential direction, and the width of the pressing groove 62 gradually increases from the groove bottom to the notch. The shape of the pressing groove 62 can be matched with the supporting ring 11, so that the sealing ring 3 between the pressing groove 62 and the supporting ring is tightly attached to the pressing groove 62 and the supporting ring 11, in addition, the sealing ring 3 is in self elasticity, and the outer ring and the inner ring have elasticity close to the connecting ring 61, so that the sealing performance between the two is better.
Although the application has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various variations and modifications may be made to the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, drawings and claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will be apparent to those skilled in the art.