CN115077334A - Length-adjustable measuring device for thickness of polyurethane of prefabricated directly-buried insulating pipe - Google Patents

Abstract

The length-adjustable measuring device for the thickness of polyurethane of a prefabricated directly-buried insulating pipe relates to a measuring device, two ends of a telescopic square pipe (1) are respectively connected with the upper ends of a supporting vertical plate (2) at one side and a supporting vertical plate (15) at the other side, the lower ends of the supporting vertical plate at one side and the supporting vertical plate at the other side are respectively provided with a clamp for clamping the end part of a steel pipe (48), a sliding block is sleeved in the middle of the telescopic square pipe, the upper end of a sleeve (17) is fixedly connected with the lower end face of the sliding block, the sleeve is sleeved on a telescopic pipe (18), the lower end of the telescopic pipe is provided with a universal ball (19), and the thickness of a high-density polyethylene outer protective pipe (50) is subtracted from the clamp to the height of the telescopic square pipe to the height of the universal ball to obtain the thickness of rigid polyurethane foam (49); the invention utilizes the fixture and the supporting vertical plate to form a support for the steel pipe, the slide block obtains the movement on the prefabricated direct-buried heat-insulation pipe, and the thickness measurement of polyurethane is obtained through the height change of the telescopic pipe and the universal ball.

Description

Length-adjustable measuring device for thickness of polyurethane of prefabricated directly-buried insulating pipe

Technical Field

The invention relates to a measuring instrument, in particular to a length-adjustable measuring instrument for the thickness of polyurethane of a prefabricated directly-buried insulating pipe.

Background

The prefabricated direct-buried heat insulation pipe is mainly used in a liquid and gas conveying pipe network, wherein the prefabricated direct-buried heat insulation pipe is used in more chemical pipeline heat insulation projects such as petroleum, chemical, central heating and heat supply networks and municipal works, the diameter of a steel pipe of the pipe is about eighty centimeters to one meter and five meters, and the length of the steel pipe is between several meters and tens of meters; the processing process of the prefabricated direct-buried heat-insulating pipe comprises the steps of sleeving a high-density polyethylene outer protective pipe with the length shorter than that of a steel pipe on the outer side of the treated steel pipe, placing an annular baffle plate in an interval between the steel pipe and two ends of the high-density polyethylene outer protective pipe, penetrating the high-density polyethylene outer protective pipe by using a puncture head of a high-pressure foaming machine, and then flushing rigid polyurethane foam into the high-density polyethylene outer protective pipe, so that the rigid polyurethane foam is quickly filled between the steel pipe and the high-density polyethylene outer protective pipe; because the outer pillar of high density polyethylene's flexibility and the big characteristic of weight can cause local rigid polyurethane foam thickness not to reach standard, pass through when the consignor accepts and test and punch on outer pillar of high density polyethylene and rigid polyurethane foam, confirm whether reach the requirement through measuring the hole depth on the outer pillar of high density polyethylene of steel pipe and the rigid polyurethane foam, then use the shutoff material to fill the measuring hole, so not only cause the injury to prefabricated direct-burried insulating tube, and the shutoff operation influences man-hour moreover.

Disclosure of Invention

In order to overcome the defects in the background art, the invention discloses a length-adjustable measuring device for the thickness of polyurethane of a prefabricated directly-buried insulating pipe.

The technical scheme for realizing the invention is as follows:

the utility model provides a length adjustable measuring instrument of prefabricated direct-burried insulating tube polyurethane thickness, including scalable side pipe, support the riser, a fixture, a sliding block, the sleeve pipe, flexible pipe and universal ball, the both ends of scalable side pipe are connected with the upper end opposite face that one side supported riser and opposite side support riser respectively, the lower extreme that supports the riser at one side and opposite side support the riser is equipped with the fixture that blocks the steel pipe tip respectively, the slider cover is at scalable side pipe middle part, sleeve pipe upper end and slider lower part face fixed connection, the cover pipe box is on the upper portion of flexible pipe, the lower extreme of flexible pipe is equipped with universal ball, subtract the thickness of high density polyethylene outer pillar again behind the height of scalable side pipe to universal ball through the height that subtracts scalable side pipe with fixture to scalable side pipe alright obtain hard polyurethane foam thickness.

The length-adjustable measuring device for the thickness of the polyurethane of the prefabricated directly-buried insulating pipe is characterized in that the clamps at the lower ends of the supporting vertical plate at one side and the supporting vertical plate at the other side are of the same structure and are used in opposite directions, each clamp comprises an upper clamp block, a connecting vertical plate, an upper handle, a lower clamp block, a torsion spring, a shaft lever and a lower handle, the outer end of each upper clamp block is provided with a short rod, the outer part of each short rod is provided with the upper handle, the lower part of the outer side of each upper clamp block is provided with the connecting vertical plate, the lower middle part of each connecting vertical plate is provided with a gap, and the upper part of each gap is provided with a limiting plate; the middle part of the lower fixture block is provided with a rectangular opening, a spring hole of the torsion spring is positioned in the rectangular opening, the middle part of the lower fixture block is spanned by the interval of the connecting vertical plate, a shaft lever sequentially passes through a shaft hole A on one side of the connecting vertical plate, a shaft hole B on one side of the rectangular opening of the lower fixture block, the spring hole of the torsion spring, the shaft hole B on the other side of the rectangular opening of the lower fixture block and a shaft hole A on the other side of the connecting vertical plate; one end of the torsion spring is propped against the limiting plate, and the other end of the torsion spring is propped against the upper part of the rectangular opening of the lower clamping block; the outer end of the lower fixture block is provided with a lower handle.

The length-adjustable measuring device for the thickness of the polyurethane of the prefabricated directly-buried insulating pipe is characterized in that the lower surface of the upper clamping block is provided with protruding points distributed at four corners.

The length-adjustable measuring device for the thickness of the polyurethane of the prefabricated direct-burried thermal insulation pipe is characterized in that a convex block is arranged on the upper surface of the inner end of the lower fixture block.

The length-adjustable measuring device for the thickness of the polyurethane of the prefabricated directly-buried insulating pipe is characterized in that the telescopic square pipes are of two parallel telescopic structures, the upper part and the lower part of the connecting surface of one square pipe are respectively provided with a convex strip B, the opposite surfaces of the two convex strips B are respectively provided with a hemispherical clamping strip, the upper part and the lower part of the connecting surface of the other square pipe, which are close to each other, are respectively provided with a convex strip A, the upper part of the convex strip A is provided with a clamping hook, and the lower part of the convex strip A is provided with a clamping hook; the clamping hook of the other square tube two-convex strip A is inserted between the hemisphere clamping strip of one square tube two-convex strip B and the connection surface of one square tube.

The length-adjustable measuring tool for the thickness of the polyurethane of the prefabricated directly-buried insulating pipe is characterized in that connecting plates are respectively arranged on opposite surfaces of the upper portion of a supporting vertical plate on one side and the upper portion of a supporting vertical plate on the other side, pipe holes at two ends of a telescopic square pipe are respectively sleeved on the connecting plates, and screws penetrate through unthreaded holes of the telescopic square pipe and then are connected with screw holes A in the connecting plates.

The length-adjustable measuring tool for the thickness of the polyurethane of the prefabricated direct-buried insulating pipe comprises a sliding block, a sliding block and a sliding block, wherein the sliding block comprises a 'コ' -shaped plate, a sealing plate, wheel sets and spring pieces, the upper part and the lower part of the part, close to the mouth, of the 'コ' -shaped plate are respectively provided with an unthreaded hole, the upper part and the lower part of the butt joint surface of the sealing plate are respectively provided with a connecting clamping strip, the sealing plate is buckled at the mouth of the 'コ' -shaped plate, a screw hole B of the two connecting clamping strips of the sealing plate is connected after a screw penetrates through the unthreaded hole of the 'コ' -shaped plate, and two ends of a penetrating shaft of the two wheel sets at the upper part are respectively penetrated in a wheel shaft hole at the lower part of the connecting clamping strip on the sealing plate and a wheel shaft hole at the upper part of a vertical plate of the 'コ' -shaped plate; two ends of the lower two wheel set penetrating shaft are respectively penetrated in a wheel axle hole at the upper part of the connecting clamping strip and a wheel axle hole at the lower part of the vertical plate of the plate shaped like the Chinese character 'コ', the wheels of the upper two wheel sets and the wheels of the lower two wheel sets are respectively movably connected with the upper surface and the lower surface of the telescopic square tube, and spring pieces are respectively arranged at the middle part of the vertical plate of the plate shaped like the Chinese character 'コ' and the middle part of the sealing plate.

The length-adjustable measuring device for the thickness of the polyurethane of the prefabricated direct-buried insulating pipe is characterized in that each wheel set comprises at least five wheels, spacing pipes are sleeved on penetrating shafts between the wheels, and the spacing pipes are respectively sleeved on the penetrating shafts outside the wheels at the two outermost ends.

The length-adjustable measuring device for the thickness of the polyurethane of the prefabricated direct-buried insulating pipe is characterized in that a bearing is arranged in the middle of each wheel, and an inner ring of each bearing is sleeved on a through shaft.

The length-adjustable measuring device for the thickness of the polyurethane of the prefabricated directly-buried insulating pipe is characterized in that a mounting plate is arranged outside an upper port of a sleeve, an inner protruding ring is arranged on the inner wall of a lower port of the sleeve, a protruding ring is arranged outside the upper end of a telescopic pipe, the telescopic pipe is arranged in the sleeve, then a screw rod at the upper end of a universal ball is connected with a threaded hole in the lower end face of the telescopic pipe, a spring is arranged in the sleeve at the upper end of the telescopic pipe, and the mounting plate is fixed on the lower end face of a sliding block through screws.

Through the disclosure, the beneficial effects of the invention are as follows:

the length-adjustable measuring device for the thickness of the polyurethane of the prefabricated directly-buried insulating pipe is characterized in that two clamps are quickly connected with two ends of a steel pipe, and the thickness of the rigid polyurethane foam in the same linear range can be obtained by sliding a sliding block on a telescopic square pipe; the invention is suitable for the prefabricated direct-buried heat-insulation pipe with a fixed length, and the installation and the removal of the heat-insulation pipe are facilitated by arranging the telescopic square pipe.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the chuck construction of the present invention;

FIG. 3 is a schematic perspective view of the fixture of the present invention;

FIG. 4 is a schematic view of the slider and the telescopic square tube structure of the present invention;

FIG. 5 is a schematic view of the butt joint structure of the telescopic square tube of the present invention;

FIG. 6 is a schematic perspective view of a square tube according to the present invention;

FIG. 7 is a schematic perspective view of another square tube of the present invention;

FIG. 8 is a perspective view of the slider assembly of the present invention;

FIG. 9 is a perspective assembly view of the wheel assembly of the present invention;

FIG. 10 is a schematic view of a telescoping tube configuration of the present invention;

FIG. 11 is a schematic view of a measurement state of the present invention;

in the figure: 1. a telescopic square tube; 2. one side supports the vertical plate; 3. an upper clamping block; 4. a raised point; 5. a short bar; 6. connecting a vertical plate; 7. an upper handle; 8. a torsion spring; 9. a lower handle; 10. a shaft lever; 11. a lower clamping block; 12. a raised block; 13. mounting a plate; 14. a screw; 15. the other side supports the vertical plate; 16. a sealing plate; 17. a sleeve; 18. a telescopic pipe; 19. a universal ball; 20. a connecting plate; 21. a screw hole A; 22. the shaft hole A; 23. a limiting plate; 24. spacing; 25. a shaft hole B; 26. a rectangular opening; 27. a wheel set; 28. a spring plate; 29. a "コ" shaped plate; 30. a scale; 31. a hemisphere clamping strip; 32. a hook is clamped; 33. a light hole; 34. a raised strip A; 35. a raised strip B; 36. a wheel axle hole; 37. connecting the clamping strips; 38. a screw hole B; 39. a wheel; 40. a bearing; 41. a spacer tube; 42. penetrating a shaft; 43. a spring; 44. a projecting ring; 45. a threaded hole; 46. an inner raised ring; 47. a screw; 48. a steel pipe; 49. rigid polyurethane foams; 50. high density polyethylene outer protective pipe.

Detailed Description

The present invention will be further illustrated with reference to the following examples; the following examples are not intended to limit the present invention, and are only used as a support for the implementation of the present invention, and any equivalent structure replacement within the technical framework of the present invention is included in the protection scope of the present invention;

the length-adjustable measuring device for the thickness of the polyurethane of the prefabricated direct-buried insulating pipe comprises a telescopic square pipe 1, a supporting vertical plate, a clamping device, a sliding block, a sleeve 17, a telescopic pipe 18 and a universal ball 19, wherein two ends of the telescopic square pipe 1 are respectively connected with the upper end opposite surfaces of the supporting vertical plate 2 at one side and the supporting vertical plate 15 at the other side, the lower ends of the supporting vertical plate 2 at one side and the supporting vertical plate 15 at the other side are respectively provided with the clamping device for clamping the end part of a steel pipe 48, the sliding block is sleeved at the middle part of the telescopic square pipe 1, a mounting plate 13 is arranged outside the upper end opening of the sleeve 17, the inner wall of the lower end opening of the sleeve 17 is provided with an inner convex ring 46, the outer part of the upper end of the telescopic pipe 18 is provided with a convex ring 44, the telescopic pipe 18 is arranged in the sleeve 17, then a screw 47 at the upper end of the universal ball 19 is connected with a threaded hole 45 at the lower end surface of the telescopic pipe 18, a spring 43 is arranged in the sleeve 17 at the upper end of the telescopic pipe 18, the mounting plate 13 is fixed on the lower end face of the sliding block by using screws, and the thickness of the rigid polyurethane foam 49 can be obtained by subtracting the height from the clamp to the telescopic square tube 1 to the universal ball 19 from the height from the telescopic square tube 1 and then subtracting the thickness from the high-density polyethylene outer protective tube 50.

With reference to fig. 1, 2 or 3, the fixtures at the lower ends of the vertical supporting plate 2 at one side and the vertical supporting plate 15 at the other side have the same structure and are used in opposite directions, each fixture comprises an upper fixture block 3, a vertical connecting plate 6, an upper handle 7, a lower fixture block 11, a torsion spring 8, a shaft rod 10 and a lower handle 9, the lower surface of the upper fixture block 3 is provided with four-corner-distributed convex points 4, the outer end of the upper fixture block 3 is provided with a short rod 5, the outer part of the short rod 5 is provided with the upper handle 7, the lower part of the outer side of the upper fixture block 3 is provided with the vertical connecting plate 6, the lower middle part of the vertical connecting plate 6 is provided with a gap 24, and the upper part of the gap 24 is provided with a limiting plate 23; the upper surface of the inner end of the lower fixture block 11 is provided with a convex block 12, the middle part of the lower fixture block 11 is provided with a rectangular opening 26, a spring hole of the torsion spring 8 is positioned in the rectangular opening 26, the interval 24 of the connecting vertical plate 6 spans the middle part of the lower fixture block 11, and the shaft rod 10 sequentially passes through a shaft hole A22 at one side of the connecting vertical plate 6, a shaft hole B25 at one side of the rectangular opening 26 of the lower fixture block 11, a spring hole of the torsion spring 8, a shaft hole B25 at the other side of the rectangular opening 26 of the lower fixture block 11 and a shaft hole A22 at the other side of the connecting vertical plate 6; one end of the torsion spring 8 is propped against the limiting plate 23, and the other end of the torsion spring 8 is propped against the upper part of the rectangular opening 26 of the lower fixture block 11; the outer end of the lower fixture block 11 is provided with a lower handle 9.

With reference to fig. 1, 4, 5, 6 or 7, the telescopic square tube 1 is two parallel telescopic structures, wherein a convex strip B35 is respectively arranged above and below the connecting surface of one square tube, hemispherical clamping strips 31 are respectively arranged on the opposite surfaces of two convex strips B35, convex strips a34 are respectively arranged above and below the connecting surface of the other square tube, a clamping hook 32 is arranged at the upper part of the upper convex strip a34, and a clamping hook 32 is arranged at the lower part of the lower convex strip a 34; the clamping hook 32 of the other square tube two-convex strip A34 is inserted between the hemispherical clamping strip 31 of one square tube two-convex strip B35 and the connecting surface of the square tube; the opposite surfaces of the upper parts of the supporting vertical plate 2 at one side and the supporting vertical plate 15 at the other side are respectively provided with a connecting plate 20, a pipe hole at one end of one square pipe in the telescopic square pipe 1 is sleeved on the connecting plate 20, and a screw 14 passes through a light hole 33 of the telescopic square pipe 1 and then is connected with a screw hole A21 on the connecting plate 20; the pipe hole at one end of the other square pipe is sleeved on the other connecting plate 20, and the screw 14 passes through the unthreaded hole 33 of the other square pipe and then is connected with the screw hole A21 on the other connecting plate 20.

With reference to fig. 1, 7, 8 or 9, the slider includes an コ -shaped plate 29, a sealing plate 16, a wheel set 27 and a spring plate 28, wherein, the upper and lower parts of the mouth part of the コ -shaped plate are respectively provided with a unthreaded hole, the upper and lower parts of the butt joint surface of the sealing plate 16 are respectively provided with a connecting clamping strip 37, the sealing plate 16 is buckled at the mouth part of the コ -shaped plate 29, a screw passes through the unthreaded hole of the コ -shaped plate and then is connected with two screw holes B38 of the connecting clamping strip 37 of the sealing plate 16, and the two ends of the penetrating shaft 42 of the two upper wheel sets 27 are respectively penetrated in a wheel shaft hole 36 on the sealing plate 16 and connected with the lower part of the clamping strip 37 and a wheel shaft hole 36 on the upper part of the vertical plate of the コ -shaped plate 29; two ends of the penetrating shaft 42 of the two lower wheel sets 27 are respectively penetrated in the axle hole 36 at the upper part of the connecting clamping strip 37 below the sealing plate 16 and the axle hole 36 at the lower part of the vertical plate of the 'コ' shaped plate 29, the wheels 39 of the two upper wheel sets 27 and the wheels 39 of the two lower wheel sets 27 are respectively movably connected with the upper and lower surfaces of the telescopic square tube 1, each wheel set 27 comprises at least five wheels 39, the middle part of each wheel 39 is respectively provided with a bearing 40, the inner ring of the bearing 40 is sleeved on the penetrating shaft 42, the penetrating shaft 42 between the wheels 39 and the wheels 39 is sleeved with a spacing tube 41, the penetrating shafts 42 outside the two outermost wheels 39 are respectively sleeved with spacing tubes 41, and the middle parts of the vertical plate of the 'コ' shaped plate 29 and the middle part of the sealing plate 16 are respectively provided with spring pieces 28.

The invention relates to a length-adjustable measuring device for the thickness of polyurethane of a prefabricated directly-buried insulating pipe, which is sold in the market by combining the attached drawings 1 to 11 and a universal ball 19; the sealing plate 16, the 'コ' -shaped plate 29, the one-side supporting vertical plate 2 and the upper fixture block 3 of the integrated structure, the lower fixture block 11, the other-side supporting vertical plate 15, the other upper fixture block 3 and the other lower fixture block 11 are made of aluminum alloy; the telescopic square tube 1 is an aluminum alloy section; the sleeve 17 and the extension tube 18 are made of stainless steel; wheel set 27 may be purchased for use with toy wheels.

When the telescopic square tube is used by combining with the attached figure 11, the length of the telescopic square tube 1 is adjusted by the supporting vertical plate 2 at one side and the supporting vertical plate 15 at the other side, then the two upper clamping blocks 3 are respectively clamped at the upper parts of the two ends of the steel pipe 48, the two lower clamping blocks 11 are respectively clamped at the lower parts of the two ends of the steel pipe 48, then the position of the slide block is adjusted according to the requirement, the height from the lower end of the universal ball 19 to the lower surface of the telescopic square tube 1 is measured through the corresponding position of the universal ball 19, then, the height from the upper end part of the middle steel pipe 48 at the protruding point 4 of the upper fixture block 3 to the lower part of the telescopic square pipe 1 of the supporting vertical plate 2 at one side and the height from the upper end part of the middle steel pipe 48 at the protruding point 4 of the other upper fixture block 3 to the lower part of the telescopic square pipe 1 of the supporting vertical plate 15 at the other side are measured, the height of the universal ball 19 is subtracted from the height of the supporting vertical plate 2 at one side and the height of the supporting vertical plate 15 at the other side, and then the thickness of the high-density polyethylene outer protective pipe 50 is subtracted to obtain the accurate thickness of the hard polyurethane foam 49.

The telescopic tube has an expansion function, a scale 30 is arranged on the side wall of the telescopic tube 18, the scale 30 can be made by using printed stickers, then the size from the lower end of a universal ball 19 to the lower end of the telescopic tube 18 is measured, the scale 30 is started to the size from the lower end of the scale 30 to the lower end of the telescopic tube 18, the lower end of a sleeve 17 to the lower part of a telescopic square tube 1 is cut off after the size of the scale 30 is subtracted, the trimmed scale 30 is pasted on the telescopic tube 18, the scale 30 on the telescopic tube 18 is watched when in use, the size from the lower end of the sleeve 17 to the lower part of the telescopic square tube 1 is relatively fixed according to the size from the exposed size of the upper part of the scale 30 to the lower part of the telescopic square tube 1, then the upper part of the end part of a middle steel tube 48 at the protruding point 4 of an upper fixture block 3 is higher than the upper part of the end part of the middle steel tube 48 at the protruding point 4 of the other fixture block 3 to the lower part of the telescopic square tube 1 of the support riser 15 at the other side, the accurate thickness of the rigid polyurethane foam 49 can be obtained by subtracting the size from the lower end of the sleeve 17 to the lower portion of the telescopic square tube 1, the display size of the scale 30 and the thickness of the outer sheath 50 of the high density polyethylene.

The present invention is not described in detail in the prior art.

Claims (10)

1. The utility model provides an adjustable measuring tool of length of prefabricated direct-burried insulating tube polyurethane thickness, includes scalable square pipe (1), supports riser, fixture, slider, sleeve pipe (17), flexible pipe (18) and universal ball (19), characterized by: the both ends of scalable square pipe (1) are connected with the upper end opposite face that one side supported riser (2) and opposite side supported riser (15) respectively, the lower extreme that supports riser (2) and opposite side at one side and support riser (15) is equipped with the fixture that blocks steel pipe (48) tip respectively, the slider cover is in scalable square pipe (1) middle part, sleeve pipe (17) upper end and slider lower part face fixed connection, sleeve pipe (17) cover is on the upper portion of flexible pipe (18), the lower extreme of flexible pipe (18) is equipped with universal ball (19), through with the fixture to the height of scalable square pipe (1) subtract the thickness that highly subtracts high density polyethylene outer casing (50) again behind the height of scalable square pipe (1) to universal ball (19) alright obtain rigid polyurethane foam (49) thickness.

2. The apparatus for measuring the thickness of the polyurethane of the prefabricated direct-burried thermal insulation pipe according to claim 1, wherein: the fixture at the lower ends of the supporting vertical plate (2) at one side and the supporting vertical plate (15) at the other side is of the same structure and is used in the opposite direction, the fixture comprises an upper fixture block (3), a connecting vertical plate (6), an upper handle (7), a lower fixture block (11), a torsion spring (8), a shaft lever (10) and a lower handle (9), a short rod (5) is arranged at the outer end of the upper fixture block (3), the upper handle (7) is arranged outside the short rod (5), the connecting vertical plate (6) is arranged at the lower part of the outer side of the upper fixture block (3), a gap (24) is arranged at the lower middle part of the connecting vertical plate (6), and a limiting plate (23) is arranged at the upper part of the gap (24); the middle part of the lower clamping block (11) is provided with a rectangular opening (26), a spring hole of the torsion spring (8) is positioned in the rectangular opening (26), an interval (24) for connecting the vertical plate (6) spans the middle part of the lower clamping block (11), and the shaft rod (10) sequentially penetrates through a shaft hole A (22) on one side of the connecting vertical plate (6), a shaft hole B (25) on one side of the rectangular opening (26) of the lower clamping block (11), the spring hole of the torsion spring (8), the shaft hole B (25) on the other side of the rectangular opening (26) of the lower clamping block (11) and the shaft hole A (22) on the other side of the connecting vertical plate (6); one end of the torsion spring (8) is propped against the limiting plate (23), and the other end of the torsion spring (8) is propped against the upper part of the rectangular opening (26) of the lower fixture block (11); the outer end of the lower clamping block (11) is provided with a lower handle (9).

3. The apparatus for measuring the thickness of the polyurethane of the prefabricated direct-burried thermal insulation pipe according to claim 2, wherein: the lower surface of the upper clamping block (3) is provided with convex points (4) distributed at four corners.

4. The apparatus for measuring the thickness of the polyurethane of the prefabricated direct-burried thermal insulation pipe according to claim 2, wherein: the upper surface of the inner end of the lower fixture block (11) is provided with a convex block (12).

5. The apparatus for measuring the thickness of the polyurethane of the prefabricated direct-burried thermal insulation pipe according to claim 1, wherein: the telescopic square pipe (1) is of two parallel telescopic structures, a convex strip B (35) is respectively arranged above and below the connecting surface of one square pipe, hemispherical clamping strips (31) are respectively arranged on opposite surfaces of the two convex strips B (35), a convex strip A (34) is respectively arranged above and below the connecting surface of the other square pipe, a clamping hook (32) is arranged at the upper part of the upper convex strip A (34), and a clamping hook (32) is arranged at the lower part of the lower convex strip A (34); the hook (32) of the other square tube two-convex strip A (34) is inserted between the hemisphere clamping strip (31) of one square tube two-convex strip B (35) and the connection surface of one square tube.

6. The apparatus for measuring the thickness of the polyurethane of the prefabricated direct-burried thermal insulation pipe according to claim 1, wherein: connecting plates (20) are respectively arranged on the opposite surfaces of the upper parts of the supporting vertical plate (2) at one side and the supporting vertical plate (15) at the other side, pipe holes at the two ends of the telescopic square pipe (1) are respectively sleeved on the connecting plates (20), and a screw (14) penetrates through a unthreaded hole (33) of the telescopic square pipe (1) and then is connected with a screw hole A (21) on the connecting plates (20).

7. The apparatus for measuring the thickness of the polyurethane of the prefabricated direct-burried thermal insulation pipe according to claim 1, wherein: the sliding block comprises an コ -shaped plate (29), a sealing plate (16), a wheel set (27) and a spring piece (28), light holes are respectively formed in the upper part and the lower part of the コ -shaped plate, which are close to the mouth part, the abutting surface of the sealing plate (16) is respectively provided with connecting clamping strips (37) close to the upper part and the lower part, the sealing plate (16) is buckled on the mouth part of the コ -shaped plate (29), a screw penetrates through the light holes of the コ -shaped plate and then is connected with screw holes B (38) of the two connecting clamping strips (37) of the sealing plate (16), and two ends of a penetrating shaft (42) of the two upper wheel sets (27) are respectively penetrated in a wheel shaft hole (36) in the sealing plate (16), which is connected with the lower part of the clamping strips (37), and a wheel shaft hole (36) in the upper part of the vertical plate of the コ -shaped plate (29); two ends of a penetrating shaft (42) of the two lower wheel sets (27) are respectively penetrated in a wheel axle hole (36) at the upper part of a connecting clamping strip (37) below the sealing plate (16) and a wheel axle hole (36) at the lower part of a vertical plate of the 'コ' shaped plate (29), wheels (39) of the two upper wheel sets (27) and wheels (39) of the two lower wheel sets (27) are respectively movably connected with the upper surface and the lower surface of the telescopic square pipe (1), and spring pieces (28) are respectively arranged in the middle of the vertical plate of the 'コ' shaped plate (29) and in the middle of the sealing plate (16).

8. The apparatus for measuring the thickness of the polyurethane of the prefabricated direct-burried thermal insulation pipe according to claim 7, wherein: each wheel set (27) comprises at least five wheels (39), spacing pipes (41) are sleeved on through shafts (42) between the wheels (39) and the wheels (39), and the spacing pipes (41) are respectively sleeved on the through shafts (42) outside the two outermost wheels (39).

9. The apparatus for measuring the thickness of the prefabricated direct-burried thermal insulation pipe polyurethane according to claim 7 or 8, which is characterized in that: the middle part of each wheel (39) is respectively provided with a bearing (40), and the inner ring of the bearing (40) is sleeved on the through shaft (42).

10. The apparatus for measuring the thickness of the polyurethane of the prefabricated direct-burried thermal insulation pipe according to claim 1, wherein: the mounting plate (13) is arranged outside an upper end opening of the sleeve (17), an inner protruding ring (46) is arranged on the inner wall of a lower end opening of the sleeve (17), a protruding ring (44) is arranged outside the upper end of the telescopic pipe (18), the telescopic pipe (18) is installed in the sleeve (17), then a screw rod (47) at the upper end of the universal ball (19) is connected with a threaded hole (45) in the lower end face of the telescopic pipe (18), a spring (43) is installed in the sleeve (17) at the upper end of the telescopic pipe (18), and the mounting plate (13) is fixed on the lower end face of the sliding block through screws.

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