Composite steel jacket steel prefabricated steam thermal insulation pipe

Abstract

The utility model discloses a composite steel-in-steel prefabricated steam thermal insulation pipe which comprises a working steel pipe, an inner protective sleeve, a thermal insulation layer, a supporting ring, an outer protective sleeve and an outer protective steel pipe, the inner protective sleeve is sleeved on the outer wall of the working steel pipe, the supporting ring is sleeved on the inner protective sleeve in a sliding mode, the thermal insulation layer is arranged between the inner protective sleeve and the outer protective sleeve, and the thermal insulation layer is arranged between the working steel pipe and the outer protective sleeve. The heat preservation layer is filled with heat preservation cotton, an outer protection steel pipe is arranged outside the outer wall of the outer protection sleeve pipe, a rotating ring is installed in the sliding groove, a butt joint groove is formed in the rotating ring, a lead screw is installed on the rotating ring, a ball nut is installed on the lead screw in a threaded mode, and a connecting rod is installed on the ball nut. And one end of the connecting rod is connected with the supporting ring. According to the utility model, the problem that the thermal insulation material needs to be replaced by detaching the outer protective pipe is avoided, so that the thermal insulation material of the thermal insulation pipe is more convenient to replace, the construction cost is reduced, the supporting pressure resistance of the outer protective steel pipe is improved, and the service life of the pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of composite steel-in-steel prefabricated steam insulation pipes, in particular to a composite steel-in-steel prefabricated steam insulation pipe. Background Art

[0002] Currently, the development of my country's centralized heating industry is focused on large and medium-sized cities such as Beijing, Shenyang, Changchun, Taiyuan, Harbin, and Jinan. These cities have already established large-scale, relatively mature centralized heating facilities, equipped with a considerable scale of heat sources, heat networks, and relatively complete automatic control devices, as well as a stable and sizable number of heat users. Since coal accounts for over 70% of my country's energy consumption, especially for heating, and with the exception of a few cities like Beijing that use gas for heating, coal is the sole source of heating in other cities, insulated steam pipes are essential for transporting high-temperature steam. These pipes are generally divided into two types: direct-buried and overhead, each with its own advantages and disadvantages, suitable for different situations. Prefabricated direct-buried steam pipes offer advantages such as reduced construction costs, low heat loss, energy conservation, corrosion resistance, reduced footprint, and environmental benefits.

[0003] A search revealed that Chinese utility model patent CN205026227U discloses a prefabricated overhead steam insulated pipe. Its technical solution is as follows: its inner insulation layer is a high-temperature-resistant inorganic insulation layer, its outer insulation layer is an organic insulation layer, and its outer protective pipe is a galvanized air duct. The inner insulation layer is wrapped around the outer periphery of the working steel pipe, and the outer insulation layer is wrapped around the outer periphery of the inner insulation layer, and the outer protective pipe is sleeved outside the outer insulation layer. This prefabricated overhead steam insulated pipe breaks through the traditional insulation structure and adopts a dual insulation structure combining a high-temperature-resistant inorganic insulation layer and an organic insulation layer. This is an innovation in steam insulated pipes and effectively solves the problems of traditional steam insulated pipes, such as inconvenient construction, poor insulation effect, and easy corrosion. It can effectively reduce production costs, ensure product quality, and has excellent promotion and application value.

[0004] The technical solution in this application document still has some deficiencies: after the insulation pipe has been used for a long time, the insulation effect of its insulation layer is significantly reduced, and the outer protective pipe needs to be disassembled to replace the insulation material, which is relatively troublesome and has high construction costs. The pipe's support and compressive performance is not high, which affects the service life of the pipe. Summary of the Invention

[0005] The purpose of the utility model is to provide a composite steel-in-steel prefabricated steam insulation pipe to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a composite steel-in-steel prefabricated steam insulation pipe, comprising a working steel pipe, an inner protective casing pipe, an insulation layer, a support ring, an outer protective casing pipe and an outer protective steel pipe, the outer wall of the working steel pipe is sleeved with an inner protective casing pipe, the support ring is slidably sleeved on the inner protective casing pipe, an insulation layer is arranged between the inner and outer protective casing pipes, the support ring is located in the insulation layer, the insulation layer is filled with insulation cotton, an outer protective steel pipe is arranged outside the outer wall of the outer protective casing pipe, a slide groove is provided on the outer protective steel pipe, a swivel is installed in the slide groove, a docking groove is provided on the swivel, a screw rod is installed on the swivel, a ball nut is threadedly installed on the screw rod, a connecting rod is installed on the ball nut, and one end of the connecting rod is connected to the support ring.

[0007] By adopting the above technical solution, the inner protective casing is put on the outer wall of the working steel pipe, and the inner protective casing is passed through the support ring installed on the outer protective casing. Through the connecting rod and ball nut on the support ring, the ball nut on the first support ring is first installed on the screw rod from one end of the slide groove opened on the outer protective steel pipe. The staff uses a tool to insert it into the docking groove opened on the swivel. By rotating the swivel installed in the slide groove, the screw rod is driven to rotate, so that the first support ring moves toward one end of the insulation layer. After the first support ring moves to the appropriate position, the insulation cotton is filled into the insulation layer, and then the second support ring is installed against one end of the insulation cotton, and then the insulation cotton filling and support ring are carried out. Installation makes each group of adjacent support rings filled with insulation cotton. When the support rings move, the insulation cotton between them will also be driven to move. When the insulation effect of the insulation layer of the insulation pipe is significantly reduced and needs to be replaced, the staff uses a tool to insert it into the docking groove opened on the swivel, and drives the screw rod to rotate by rotating the swivel installed in the slide groove, so that multiple groups of support rings move to the other end of the insulation layer. As the support rings are removed from the insulation layer, the insulation cotton filled between each group of support rings is also removed from the insulation layer for replacement, avoiding the need to disassemble the outer protective pipe to replace the insulation material, making it more convenient to replace the insulation material of the insulation pipe and reducing construction costs.

[0008] Preferably, the support rings arranged axially on the inner protective sleeve are arranged at the same intervals, and the insulation layers between the support rings are filled with insulation cotton.

[0009] By adopting the above technical solution, the support rings arranged axially on the inner casing tube are arranged at the same intervals, and multiple groups of support rings are located in the insulation layer set between the inner casing tube and the outer casing tube, and are arranged at the same intervals, which plays a role in protecting the working steel pipe and improves the support pressure resistance of the outer casing tube and the service life of the pipeline.

[0010] Preferably, an auxiliary slider is installed on the support ring, an auxiliary track is opened on the outer protective steel pipe, and the auxiliary slider is slidably connected to the auxiliary track.

[0011] By adopting the above technical solution, the auxiliary slider installed on the support ring cooperates with the auxiliary track opened on the outer protective steel pipe. Since the auxiliary slider is slidably connected with the auxiliary track, the stability of the support ring during movement is improved.

[0012] Preferably, a reinforcing steel mesh is provided on the inner wall of the working steel pipe, and an anti-corrosion layer is provided on the outer wall of the outer protective steel pipe.

[0013] By adopting the above technical solution, the wear resistance of the working steel pipe is improved by the reinforcing steel mesh set on the inner wall of the working steel pipe, and the corrosion resistance of the outer protective steel pipe is increased by the anti-corrosion layer set on the outer wall of the outer protective steel pipe.

[0014] Preferably, the protrusion provided on the ball nut is slidably connected to the groove opened on the wall of the chute, and the wedge block provided on the swivel slides in the arc groove on the wall of the chute.

[0015] By adopting the above technical solution, the protrusion set on the ball nut is slidably connected with the groove opened on the wall of the slide groove, thereby preventing the ball nut from rotating and improving the stability of the ball nut during movement. The wedge block set on the swivel slides in the arc groove on the wall of the slide groove, which does not affect the rotation of the swivel and limits the left and right movement of the swivel, thereby preventing the movement of the screw rod.

[0016] Preferably, the inner sheath tube and the outer sheath tube are made of high temperature resistant heat insulating material.

[0017] By adopting the above technical solution, the heat-resistance effect and thermal insulation performance are improved by setting the materials of the inner sheath tube and the outer sheath tube to high-temperature resistant heat-insulating materials.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This avoids the need to dismantle the outer protective pipe to replace the insulation material, making it more convenient to replace the insulation material of the insulation pipe and reducing construction costs.

[0020] The supporting pressure resistance of the outer protective steel pipe and the service life of the pipeline are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional cutaway schematic diagram of the present utility model;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the end face structure of the utility model;

[0024] Figure 4 This is another end face structural schematic diagram of the present invention.

[0025] Figure 5 It is an enlarged schematic diagram of the mobile structure of the present utility model.

[0026] In the figure: 1. Working steel pipe; 2. Reinforced steel mesh; 3. Inner protective casing; 4. Insulation layer; 5. Support ring; 6. Outer protective casing; 7. Outer protective steel pipe; 8. Anti-corrosion layer; 9. Connecting rod; 10. Screw rod; 11. Swivel; 12. Docking groove; 13. Auxiliary slider; 14. Auxiliary rail; 15. Insulation cotton; 16. Slide groove; 17. Ball nut. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] See also Figure 1-5 The present invention provides an embodiment of a composite steel-in-steel prefabricated steam insulation pipe, comprising a working steel pipe 1, an inner casing pipe 3, an insulation layer 4, a support ring 5, an outer casing pipe 6 and an outer casing steel pipe 7. The outer wall of the working steel pipe 1 is sleeved with an inner casing pipe 3, the support ring 5 is slidably sleeved on the inner casing pipe 3, an insulation layer 4 is provided between the inner casing pipe 3 and the outer casing pipe 6, the support ring 5 is located in the insulation layer 4, the insulation layer 4 is filled with insulation cotton 15, an outer casing steel pipe 7 is provided on the outer wall of the outer casing pipe 6, a slide groove 16 is provided on the outer casing steel pipe 7, a swivel 11 is installed in the slide groove 16, a docking groove 12 is provided on the swivel 11, a screw rod 10 is installed on the screw rod 10, a ball nut 17 is threadedly installed on the screw rod 10, a connecting rod 9 is installed on the ball nut 17, and one end of the connecting rod 9 is connected to the support ring 5.

[0029] Through the inner sheath tube 3 set on the outer wall of the working steel pipe 1, the inner sheath tube 3 is passed through the support ring 5 installed on the outer sheath tube 6, through the connecting rod 9 and the ball nut 17 on the support ring 5, from one end of the slide 16 opened on the outer protective steel pipe 7, first install the ball nut 17 on the first support ring 5 to the screw rod 10, the staff uses a tool to insert into the docking groove 12 opened on the swivel 11, and drives the screw rod 10 to rotate by rotating the swivel 11 installed in the slide 16, so that the first support ring 5 moves toward one end of the thermal insulation layer 4. After the first support ring 5 moves to the appropriate position, the thermal insulation cotton 15 is filled into the thermal insulation layer 4, and then the second support ring 5 is installed against one end of the thermal insulation cotton 15, and then the thermal insulation cotton 15 is filled and supported. The support rings 5 ​​are installed so that each group of adjacent support rings 5 ​​are filled with insulation cotton 15. When the support rings 5 ​​move, the insulation cotton 15 between them will also be driven to move. When the insulation effect of the insulation layer of the insulation pipe is significantly reduced and needs to be replaced, the staff uses a tool to insert it into the docking groove 12 opened on the swivel 11, and drives the screw 10 to rotate by rotating the swivel 11 installed in the slide groove 16, so that multiple groups of support rings 5 ​​move toward the other end of the insulation layer 4. As the support rings 5 ​​are removed from the insulation layer 4, the insulation cotton 15 filled between each group of support rings 5 ​​is also removed from the insulation layer 4 for replacement, avoiding the need to disassemble the outer protective tube to replace the insulation material, making it more convenient to replace the insulation material of the insulation pipe and reducing construction costs.

[0030] The support rings 5 ​​axially arranged on the inner sheath tube 3 are arranged at the same intervals, and the insulation layers 4 between the support rings 5 ​​are filled with insulation cotton 15 .

[0031] The support rings 5 ​​axially arranged on the inner sheath tube 3 are arranged at the same intervals, and multiple groups of support rings 5 ​​are located in the insulation layer 4 set between the inner sheath tube 3 and the outer sheath tube 6 and are arranged at the same intervals, which plays a role in protecting the working steel pipe 1 and improves the support pressure resistance of the outer sheath steel pipe 7 and the service life of the pipeline.

[0032] An auxiliary slider 13 is installed on the support ring 5 , and an auxiliary track 14 is provided on the outer protective steel pipe 7 . The auxiliary slider 13 is slidably connected to the auxiliary track 14 .

[0033] The auxiliary slider 13 installed on the support ring 5 cooperates with the auxiliary track 14 provided on the outer protective steel pipe 7. Since the auxiliary slider 13 is slidably connected with the auxiliary track 14, the stability of the support ring 5 during movement is improved.

[0034] A reinforcing steel mesh 2 is provided on the inner wall of the working steel pipe 1 , and an anti-corrosion layer 8 is provided on the outer wall of the outer protective steel pipe 7 .

[0035] The reinforcing steel mesh 2 provided on the inner wall of the working steel pipe 1 improves the wear resistance of the working steel pipe 1 , and the anti-corrosion layer 8 provided on the outer wall of the outer protective steel pipe 7 increases the anti-corrosion performance of the outer protective steel pipe 7 .

[0036] The protrusion provided on the ball nut 17 is slidably connected to the groove opened on the groove wall of the slide groove 16, and the wedge block provided on the swivel 11 slides in the arc groove on the groove wall of the slide groove 16.

[0037] The protrusion provided on the ball nut 17 is slidably connected with the groove opened on the wall of the slide groove 16, which prevents the ball nut 17 from rotating and improves the stability of the ball nut 17 when moving. The wedge block provided on the swivel 11 slides in the arc groove on the wall of the slide groove 16, which does not affect the rotation of the swivel 11 and limits the left and right movement of the swivel 11, thereby preventing the screw rod 10 from moving.

[0038] The inner sheath tube 3 and the outer sheath tube 6 are made of high temperature resistant and heat insulating materials.

[0039] By setting the material of the inner sheath tube 3 and the outer sheath tube 6 to be high-temperature resistant heat-insulating material, the heat-resistance effect and the heat-insulating property are improved.

[0040] Working principle: Through the inner protective casing tube 3 sleeved on the outer wall of the working steel pipe 1, the inner protective casing tube 3 is passed through the support ring 5 installed on the outer protective casing tube 6, through the connecting rod 9 and the ball nut 17 on the support ring 5, from one end of the slide 16 opened on the outer protective steel pipe 7, first install the ball nut 17 on the first support ring 5 to the screw rod 10, and the staff uses a tool to insert it into the docking groove 12 opened on the swivel 11, and drives the screw rod 10 to rotate by rotating the swivel 11 installed in the slide 16, so that the first support ring 5 moves toward one end of the thermal insulation layer 4. After the first support ring 5 moves to the appropriate position, the thermal insulation cotton 15 is filled into the thermal insulation layer 4, and then the second support ring 5 is installed to resist one end of the thermal insulation cotton 15, and then the thermal insulation cotton 15 is filled and the support ring 5 is installed, so that each group of adjacent support rings 5 ​​are filled with thermal insulation cotton 15, and when the support ring 5 moves, it will also drive the thermal insulation cotton 15 between them. When the insulation effect of the insulation layer of the insulation pipe is significantly reduced and needs to be replaced, the staff uses a tool to insert it into the docking groove 12 on the swivel 11, and drives the screw 10 to rotate by rotating the swivel 11 installed in the slide groove 16, so that the multiple groups of support rings 5 ​​move to the other end of the insulation layer 4. As the support ring 5 is removed from the insulation layer 4, the insulation cotton 15 filled between each group of support rings 5 ​​is also removed from the insulation layer 4 for replacement, avoiding the need to disassemble the outer protective pipe to replace the insulation material, making it more convenient to replace the insulation material of the insulation pipe and reducing the construction cost. The support rings 5 ​​axially arranged on the inner sheath tube 3 are arranged at the same intervals, and the multiple groups of support rings 5 ​​are located in the insulation layer 4 set between the inner sheath tube 3 and the outer sheath tube 6, and are arranged at the same intervals, which plays a protective role on the working steel pipe 1 and improves the support pressure resistance of the outer protective steel pipe 7 and the service life of the pipeline.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A composite steel-jacketed prefabricated steam insulation pipe, comprising a working steel pipe (1), an inner jacket pipe (3), an insulation layer (4), a support ring (5), an outer jacket pipe (6) and an outer protective steel pipe (7), characterized in that: An inner sheath tube (3) is sleeved on the outer wall of the working steel pipe (1), the support ring (5) is slidably sleeved on the inner sheath tube (3), an insulation layer (4) is provided between the inner sheath tube (3) and the outer sheath tube (6), the support ring (5) is located in the insulation layer (4), the insulation layer (4) is filled with insulation cotton (15), an outer sheath tube (7) is provided on the outer wall of the outer sheath tube (6), a slide groove (16) is provided on the outer sheath tube (7), a swivel (11) is installed in the slide groove (16), a docking groove (12) is provided on the swivel (11), a screw rod (10) is installed on the screw rod (10), a ball nut (17) is threadedly installed on the ball nut (17), a connecting rod (9) is installed on the ball nut (17), and one end of the connecting rod (9) is connected to the support ring (5).

2. The composite steel-in-steel prefabricated steam insulation pipe according to claim 1, characterized in that: The support rings (5) arranged axially on the inner protective sleeve (3) are arranged at the same intervals, and the insulation layers (4) spaced between the support rings (5) are filled with insulation cotton (15).

3. The composite steel-in-steel prefabricated steam insulation pipe according to claim 1, characterized in that: An auxiliary slider (13) is installed on the support ring (5), an auxiliary track (14) is provided on the outer protective steel pipe (7), and the auxiliary slider (13) is slidably connected to the auxiliary track (14).

4. The composite steel-in-steel prefabricated steam insulation pipe according to claim 1, characterized in that: A reinforcing steel mesh (2) is provided on the inner wall of the working steel pipe (1), and an anti-corrosion layer (8) is provided on the outer wall of the outer protective steel pipe (7).

5. The composite steel-in-steel prefabricated steam insulation pipe according to claim 1, characterized in that: The protrusion provided on the ball nut (17) is slidably connected to a groove provided on the wall of the chute (16), and the wedge-shaped block provided on the rotating ring (11) slides in the arc groove on the wall of the chute (16).

6. The composite steel-in-steel prefabricated steam insulation pipe according to claim 1, characterized in that: The inner protective sheath tube (3) and the outer protective sheath tube (6) are made of high-temperature resistant heat-insulating material.

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