Search

CN-121977127-A - Polyethylene pipe with sealing structure at port

CN121977127ACN 121977127 ACN121977127 ACN 121977127ACN-121977127-A

Abstract

The invention discloses a polyethylene pipe with a sealing structure at a port, relates to the field of polyethylene pipes, and aims to solve the problems of insufficient reliability, lack of early warning and inconvenient maintenance in the prior sealing technology. Including the polyethylene pipe and install in the port seal structure of its tip, port seal structure has the outer peripheral frame and the interior peripheral frame that coaxial set up, the polyethylene pipe tip is located between the two, outer peripheral frame inner wall is equipped with the outer solid fixed ring of taking the rubber ring, be equipped with a plurality of groups in the interior peripheral frame and prop up the subassembly, it contains telescopic link and the arc roof in by sun gear, arc guide slot driven to prop up the subassembly in, but the radial ejecting of roof in the arc of all interior roof subassemblies of synchronous drive through rotatory sun gear installation pole, thereby with the polyethylene pipe wall order, multiple extrusion forms reliable seal on outer solid fixed ring. The invention has lasting sealing effect, has state monitoring capability, can compensate sealing pressure by screwing again, and has simple maintenance and long service life.

Inventors

  • HE CHENGFENG
  • YU LINGYUN
  • LIN JING

Assignees

  • 福建晟扬管道科技有限公司

Dates

Publication Date
20260505
Application Date
20260331

Claims (8)

  1. 1. A polyethylene pipe with a sealing structure at a port is characterized by comprising the following components: The port sealing structure (2) is fixedly arranged at the end part of the polyethylene pipe (1), the port sealing structure (2) comprises an outer surrounding frame (3) and an inner surrounding frame (6) which are coaxially arranged, the end part of the inner surrounding frame (6) is fixedly connected with the inner side of the outer surrounding frame (3), a plurality of outer fixing rings (4) are fixedly arranged on the inner wall of the outer surrounding frame (3) at intervals along the axial direction, a plurality of groups of inner top assemblies (5) are axially arranged in the inner surrounding frame (6), and the end part of the polyethylene pipe (1) is inserted between the outer surrounding frame (3) and the inner surrounding frame (6) and positioned between the outer fixing rings (4) and the inner top assemblies (5); Each group of inner top assemblies (5) comprises a central plate (12) fixed on the inner wall of an inner surrounding frame (6), a central gear (9) rotatably installed at the center of the central plate (12), a clamping gear (10) meshed with the central gear (9) and a plurality of telescopic rods (13) annularly and uniformly distributed on the central plate (12), an arc-shaped guide groove (7) is formed in the end face of the central gear (9), one end of each telescopic rod (13) is slidably arranged in each arc-shaped guide groove (7) through a guide rod (8), and an arc-shaped inner top plate (14) for pushing the inner wall of a polyethylene pipe (1) is fixedly connected to the other end of each telescopic rod; The fixed suit of sun gear (9) is on one runs through sun gear installation pole (16) of all interior top subassemblies (5), screens gear (10) fixed suit is on one runs through screens gear installation pole (15) of all interior top subassemblies (5), the end connection of sun gear installation pole (16) has installation pole pivoted plate (24) that are located outside enclosing frame (3), the end connection of screens gear installation pole (15) has installation pole tensile board (23) that are located outside enclosing frame (3), the cover is equipped with reset spring (21) on screens gear installation pole (15), under reset spring (21) effect, screens gear (10) keep with the meshing of sun gear (9) in order to lock the rotation of sun gear (9).
  2. 2. The polyethylene pipe with a sealing structure at a port according to claim 1, wherein the inner top assemblies (5) are provided with a plurality of groups, and the inner top assemblies (5) are sequentially arranged along the insertion direction of the polyethylene pipe (1).
  3. 3. The polyethylene pipe with a sealing structure at a port according to claim 2, wherein the diameters of the ring structures formed by the arc-shaped inner top plates (14) of the inner top assemblies (5) of each group are different from each other in the contracted state among the inner top assemblies (5) of each group, and are sequentially increased along the insertion direction of the polyethylene pipe (1).
  4. 4. A polyethylene pipe with a sealing structure at a port according to claim 3, characterized in that rubber rings (28) are fixedly arranged at both sides of the inner annular wall of the outer fixing ring (4).
  5. 5. The polyethylene pipe with a sealing structure at a port according to claim 4, wherein an outer sleeve rod (27) is inserted on the outer surrounding frame (3), the outer sleeve rod (27) is communicated with a space beside the outer fixing ring (4), and a display rod (25) and a floating ball (26) fixed at the bottom end of the display rod (25) are arranged in the outer sleeve rod (27).
  6. 6. The polyethylene pipe with a sealing structure at a port according to claim 5, wherein the arc-shaped inner top plate (14) comprises a first inner top plate (17) and a second inner top plate (19), extension plates (18) are arranged at two ends of the first inner top plate (17), and two ends of the second inner top plate (19) are sleeved outside the extension plates (18) of the adjacent first inner top plates (17) in a sliding manner.
  7. 7. A polyethylene pipe with a sealing structure at a port according to claim 6, wherein the central plate (12) is provided with a telescopic groove (11) for sliding the telescopic rod (13).
  8. 8. A polyethylene pipe with sealing structure at port according to claim 7, characterized in that said snap gear mounting bar (15) is splined to said center plate (12).

Description

Polyethylene pipe with sealing structure at port Technical Field The invention relates to the field of polyethylene pipes, in particular to a polyethylene pipe with a sealing structure at a port. Background Polyethylene pipe has been widely used in water supply and drainage, gas transportation, agricultural irrigation, chemical fluid transportation, etc. because of its advantages of corrosion resistance, good flexibility, light weight, relatively low cost, etc., in which reliable connection and sealing between pipe ports are key links to ensure normal operation of the system, prevent leakage of medium, and ensure safety and environmental protection. At present, the sealing connection modes of the polyethylene pipe ports are various, but certain limitations exist, and common connection modes comprise: the flange plate with the sealing gasket is fastened together through bolts, the mode needs a plurality of bolt holes to be aligned, the installation is complicated, certain requirements are met on the installation space, and under the condition of long-term vibration or temperature change, the bolts can loosen to cause the reduction of the pressing force of the sealing gasket, so that leakage is caused. And (3) hot melting connection, namely melting the end surface of the pipe by using a special heating tool, and then pressing and welding the pipe into a whole. Although the connection strength is high, professional heating equipment is required, the operation process requirement is strict, the connection is permanent, once the adjustment or the disassembly cannot be completed, if the connection quality is poor or the later part is damaged, the whole pipeline can be cut off, and the maintenance cost is high. The clamping and pressing type connection (mechanical connection) uses a pipe fitting with a rubber sealing ring, and radial pressing force is generated by a mechanical pressing device (such as a clamp and a screw) to realize sealing, so that the mode is relatively simple, but the sealing effect depends on the elasticity and initial pressing force of the rubber ring to a great extent. In the long-term service process, the rubber material can age and relax, and the pipeline itself can generate tiny creep under internal pressure, and all the factors can lead to the attenuation of initial pressing force, the reduction of sealing effect and the risk of leakage. In addition, most snap connections, once installed, cannot be compensatively refastened without stopping and dismantling, with reduced sealing forces due to material relaxation. More particularly, the conventional sealing method generally lacks an effective sealing state monitoring or early leakage early warning mechanism. Leakage tends to occur inside the sealing interface, which may be very small at the beginning and difficult to observe directly from the outside. Only when the leakage amount increases to the oozing surface or causes obvious faults, the leakage amount is perceived, and at this time, resource waste, environmental pollution and even safety accidents can be caused. Therefore, there is a need in the art for a new sealing structure for polyethylene pipe ports that overcomes the deficiencies of the prior art, provides a solution that is more reliable and durable in sealing, has sealing force attenuation compensation capability, can monitor sealing conditions in real time, and is relatively simple to install and maintain. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a polyethylene pipe with a sealing structure at a port, which has the advantages of active pressure application, multiple sequential sealing, self-locking and anti-loosening, leakage early warning, refastenable functions and the like, and solves the series of problems of insufficient sealing reliability, lack of state monitoring and early warning, difficult maintenance, uneven sealing pressure distribution and the like. In order to achieve the above purpose, the invention provides a technical scheme that a polyethylene pipe with a sealing structure at a port comprises: Comprises a polyethylene pipe and a port sealing structure fixedly arranged at the port of the polyethylene pipe. The port sealing structure mainly comprises an outer surrounding frame, an inner surrounding frame, a plurality of outer fixing rings and a plurality of groups of inner top assemblies. The outer surrounding frame and the inner surrounding frame are coaxially arranged to form an annular cavity to accommodate the end part of the polyethylene pipe. An outer fixing ring with a rubber ring is fixed on the inner wall of the outer surrounding frame. And a plurality of groups of inner top assemblies are axially arranged in the inner surrounding frame. Each group of inner top components comprises a central plate, a central gear, a clamping gear, a plurality of telescopic rods with guide rods and an arc-shaped inner top plate. The arc-shaped guide groove on the end face of