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CN-224214865-U - Central thermal insulation pipe pre-extension quick positioning device for middle-deep geothermal well

CN224214865UCN 224214865 UCN224214865 UCN 224214865UCN-224214865-U

Abstract

The utility model discloses a pre-extension quick positioning device for a central insulating pipe of a middle-deep geothermal well, wherein one end of the central insulating pipe is positioned through a driving ring, the other end of the central insulating pipe is positioned through a fixed ring and a driven ring, the driving ring is of a double-step type cylinder structure with a convex vertical section along an axis, the protruding length can be adjusted, the outer circumference of the driving ring is fixed with an outer pipe, the protruding length of the driving ring is adjusted according to the preset length, the inner pipe is pushed to enter the pipe end of the outer pipe for a preset distance, the fixed ring is of a cylinder structure with a concave vertical section along the axis, a proximity switch is arranged in a concave position of the fixed ring, the driven ring is of a cylinder ring structure with adjustable axial height, the driven ring is arranged in the outer pipe, the fixed ring is sleeved outside the outer pipe, a concave step is contacted with the end face of the outer pipe, one side of the driven ring is contacted with the inner pipe, and when the pre-extension length of the inner pipe reaches the preset length, the driven ring triggers a proximity switch to disconnect a heating extension device. The problem of current manual measurement receive multiple factor to influence the error big, measurement efficiency is low is solved.

Inventors

  • LI YONGLI
  • ZHENG CHENGJIE
  • XIONG XIN
  • LIU WENJING

Assignees

  • 西安润威恒泰地热管技术有限公司

Dates

Publication Date
20260508
Application Date
20250625

Claims (7)

  1. 1. The device is characterized by comprising a driving ring (1), a fixed ring (5) and a driven ring (7), wherein one end of the central heat-insulating pipe is positioned through the driving ring (1), the other end of the central heat-insulating pipe is positioned through the fixed ring (5) and the driven ring (7), the driving ring (1) is of a double-step cylinder structure with a convex vertical section along an axis, the protruding length can be adjusted, an outer pipe (12) of the central heat-insulating pipe is fixed on the outer circumference of the driving ring (1), the protruding length of the protruding part of the driving ring (1) is adjusted according to the preset length, and an inner pipe (11) of the central heat-insulating pipe is pushed to enter the preset distance of the pipe end of the outer pipe (12); The fixed ring (5) is a cylinder structure with a concave structure along the vertical section of an axis, a proximity switch (6) is arranged in a concave position of the fixed ring (5), the driven ring (7) is of a cylindrical annular structure with adjustable axial height, the driven ring (7) is arranged on the inner side of an outer tube (12) of a central heat-insulating tube, the fixed ring (5) is sleeved on the outer side of the outer tube (12) at the same end, a concave step is in contact with the end face of the outer tube (12), one end of the driven ring (7) is in contact with an inner tube (11), when the pre-extension length of the inner tube (11) reaches a preset length, the other end of the driven ring (7) triggers the proximity switch (6), and the proximity switch (6) generates a signal which is used for disconnecting a heating extension device of the inner tube (11).
  2. 2. The device for quickly positioning the pre-extension of the central insulating pipe of the middle-deep geothermal well according to claim 1 is characterized in that the middle protruding portion of the driving ring (1) is provided with first screw holes (2) respectively at the upper side and the lower side, and the first screw holes (2) fix the driving ring gaskets (4) at the middle protruding portion of the driving ring (1) through first bolts (3) respectively.
  3. 3. The pre-extension rapid positioning device for the central heat preservation pipe of the middle and deep geothermal well according to claim 1 is characterized in that second screw holes (8) are respectively formed in the upper side and the lower side of the driven ring (7), and the second screw holes are respectively used for fixing a driven ring gasket (10) on the driven ring (7) through second bolts (9).
  4. 4. The device for quickly positioning the pre-elongation of the central insulating pipe of the mid-deep geothermal well according to claim 1 is characterized in that the initial thickness of the protruding part of the driving ring (1) is 5mm.
  5. 5. The device for quickly positioning the pre-elongation of the central insulating pipe of the mid-deep geothermal well according to claim 1, wherein the initial thickness of the passive ring (7) is 5mm.
  6. 6. The device for quickly positioning the pre-elongation of the central insulating pipe of the mid-deep geothermal well according to claim 4 is characterized in that the thickness of the driving ring gasket (4) is 1, 2 and 5mm respectively.
  7. 7. The device for quickly positioning the pre-elongation of the central insulating pipe of the mid-deep geothermal well according to claim 5 is characterized in that the passive ring gaskets (10) are respectively 1, 2 and 5mm thick.

Description

Central thermal insulation pipe pre-extension quick positioning device for middle-deep geothermal well Technical Field The utility model belongs to the field of central heat preservation pipes, and particularly relates to a central heat preservation pipe pre-extension rapid positioning device for a middle-deep geothermal well. Background Production process of central heat-insulating pipe the two ends of the inner pipe and the outer pipe are required to be aligned the relative lengths are positioned and the pre-extension length is determined. The heat insulation pipe has the advantages that firstly, the heat expansion and cold contraction of the central heat insulation pipe can be caused by the influence of temperature change in the use process, the pre-extension length can compensate the heat extension of the pipeline in operation, the stress caused by the heat expansion and cold contraction is reduced, the deformation, the breakage or the damage of the pipeline are prevented, the normal operation and the service life of a pipeline system are guaranteed, secondly, the tightness of the connecting position of the pipeline is guaranteed, the pre-extension length can enable the inner pipe and the outer pipe to be tightly combined after the installation, the medium leakage is prevented, the heat supply efficiency and the safety of a geothermal system are guaranteed, thirdly, the stability and the reliability of the whole central heat insulation pipe system are improved, the problems of displacement, vibration and the like of the pipeline caused by the change of the length of the pipeline are avoided, and the maintenance cost is reduced. The current implementation method of the pre-extension length is to adjust and fix the relative positions of the inner pipe and the outer pipe in a manual measurement mode according to design requirements and related standards in the production process of geothermal heat preservation pipes. The existing mechanical measuring tool, such as a vernier caliper, a tape measure and the like, has the defects that the measuring precision is greatly influenced by human factors, and a reading error possibly occurs, so that the pre-elongation is inaccurate, the measuring efficiency is low, and when the measuring tool is used for mass production, the relative lengths of the two ends of the inner pipe and the outer pipe are measured one by one, and then the pre-elongation length is determined, so that more time is consumed, and the production progress is influenced. Disclosure of utility model In order to overcome the defects of the prior art, the utility model aims to provide the pre-extension quick positioning device for the central heat preservation pipe of the middle-deep geothermal well, which solves the problems that the existing mechanical measuring tool is greatly affected by various factors, the extension of the inner pipe is required to be measured for many times, the process is complicated and the measuring efficiency is low. The utility model is realized by the following technical scheme: The central heat-insulating pipe pre-extension quick positioning device of the middle-deep geothermal well comprises a driving ring, a fixing ring and a driven ring, wherein one end of the central heat-insulating pipe is positioned through the driving ring, the other end of the central heat-insulating pipe is positioned through the fixing ring and the driven ring, the driving ring is of a double-order cylinder structure with a convex vertical section along an axis, the protruding length can be adjusted, the outer circumference of the driving ring is used for fixing an outer pipe of the central heat-insulating pipe, the protruding length of the protruding portion of the driving ring is adjusted according to the preset length, and the inner pipe of the central heat-insulating pipe is pushed to enter the preset distance of the pipe end of the outer pipe; The fixed ring is a cylindrical structure with a concave structure along the vertical section of an axis, the concave part of the fixed ring is provided with a proximity switch, the driven ring is of a cylindrical annular structure with adjustable axial height, the driven ring is arranged in an outer tube of a central heat-insulating tube, the fixed ring is sleeved outside the outer tube at the same end, a concave step is in contact with the end face of the outer tube, one end of the driven ring is in contact with an inner tube, when the pre-extending length of the inner tube reaches a preset length, the other end of the driven ring triggers the proximity switch, and the proximity switch generates a signal which is used for disconnecting a heating extending device of the inner tube. Further, the middle protruding part of the driving ring is provided with first screw holes at the upper side and the lower side respectively, and the first screw holes fix the driving ring gasket on the middle protruding part of the driving ring through first bolts respec