CN222717744U - Connecting structure of directly buried steam pipeline ground outlet elbow and vertical pipe section - Google Patents

Abstract

A connection structure between an elbow of a directly buried steam pipeline and a vertical pipe section, wherein the elbow is provided with an elbow working steel pipe, an elbow insulation layer and an elbow outer protective pipe in sequence from the inside to the outside, one end of the elbow is connected to the directly buried steam pipeline laid underground, and the other end is vertically extended from the ground and connected to the overhead steam pipeline through a vertical pipe section; the vertical pipe section is provided with a vertical pipe section working steel pipe, a vertical pipe section insulation layer and a vertical pipe section outer protective pipe in sequence from the inside to the outside; the special feature is that the elbow working steel pipe and the elbow outer protective pipe at the ground extension end of the elbow are eccentric assembly structures, and a rain cover is provided on the outer wall of the working steel pipe at the ground extension end of the elbow. The utility model realizes a reliable sealed connection between the directly buried steam pipeline and the vertical pipe section, and achieves the purpose of improving the construction quality of the direct buried steam pipeline and ensuring the stable operation of the urban heating pipe network system.

Description

Connecting structure of directly buried steam pipeline ground outlet elbow and vertical pipe section

Technical Field

The utility model relates to the technical field of steam conveying pipelines, in particular to a connecting structure of an underground elbow and a vertical pipe section of a direct-buried steam pipeline.

Background

The direct-buried steam pipeline laying mode has the advantages of high construction efficiency, low cost and the like, pipe fittings of the direct-buried steam pipeline can be prefabricated in a factory in advance, later project maintenance and management are simple, heat loss generated during operation is less, and the direct-buried steam pipeline laying mode has positive effects on urban environment improvement and urban beautification, so that the steam pipeline is widely applied to urban heat supply pipe network system construction at present.

In the steam pipeline direct-buried laying installation project, the connection of the ground outlet elbow and the vertical pipe section is one of key elements for the quality control of the construction process. The prefabricated steam conveying pipe fitting adopts three layers of structure of working steel pipe, heat insulating layer and outer protecting pipe, the heat insulating layer of the ground-outlet elbow and the directly buried pipeline is made of soft heat insulating material mainly made of glass wool, the outer protecting pipe is made of steel sleeve, the vertical pipe section connected after the pipeline is ground-outlet is identical to the structure of the overhead laid steam pipeline, the heat insulating layer is generally made of soft heat insulating material, hard heat insulating material and polyurethane foaming material, the outer protecting pipe is made of galvanized iron sheet, steel sheet or color steel sheet, etc., so that the ground-outlet elbow and the heat insulating layer structure of the vertical pipe section and the quality of the outer protecting pipe are different, in addition, the directly buried steam pipeline has the problem of axial extension of the working steel pipe caused by thermal effect in the operation process, and the difficulty is brought to reliable sealing connection between the ground-outlet elbow and the vertical pipe section, so that the ground-outlet elbow and the vertical pipe section of the directly buried steam pipeline is required to be optimally designed.

Disclosure of utility model

The utility model provides a connecting structure of a ground outlet elbow and a vertical pipe section of a direct-buried steam pipeline, and aims to realize reliable sealing connection of the direct-buried steam pipeline and the vertical pipe section by arranging a rain cover, eccentrically installing a ground outlet elbow working steel pipe, arranging a supporting plate on the vertical pipe section in a staggered manner and other measures, so as to achieve the purposes of improving the direct-buried laying construction quality of the steam pipeline and ensuring the stable operation of a town heat supply pipe network system.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

A connecting structure of a ground outlet elbow and a vertical pipe section of a direct-buried steam pipeline is characterized in that an elbow working steel pipe, an elbow heat-insulating layer and an elbow outer protecting pipe are sequentially arranged on the ground outlet elbow from inside to outside, one end of the ground outlet elbow is connected with a direct-buried steam pipeline laid underground, the other end of the ground outlet elbow extends out of the ground vertically and then is connected with a steam pipeline laid overhead through the vertical pipe section, the vertical pipe section is sequentially provided with the vertical pipe section working steel pipe, the vertical pipe section heat-insulating layer and the vertical pipe section outer protecting pipe from inside to outside, and the connecting structure is characterized in that the elbow working steel pipe and the elbow outer protecting pipe at the ground extending end of the ground outlet elbow are of an eccentric assembly structure, and a rain-proof cover is arranged on the outer wall of the working steel pipe at the ground extending end of the ground outlet elbow.

Above-mentioned direct burial steam piping goes out ground elbow and perpendicular pipeline section connection structure, rain-proof cover is the downhill opening form, in job site and the work steel pipe welding of elbow work of going out ground elbow ground extension end, the rain-proof cover covers the elbow heat preservation and the outer pillar of elbow of going out ground elbow ground extension end completely, the welding assembly height of rain-proof cover matches job site specific case.

The connecting structure of the ground outlet elbow and the vertical pipe section of the directly buried steam pipeline has the advantages that the offset direction of the elbow outer protection pipe of the eccentric assembly structure of the ground outlet elbow is consistent with the flow direction of medium in the steam pipeline.

Above-mentioned directly bury steam pipe and go out ground elbow and perpendicular pipeline section connection structure set up the semicircle annular backup pad between perpendicular pipeline section work steel pipe and the perpendicular pipeline section outer protection pipe, the semicircle annular backup pad is arranged a plurality of groups along perpendicular pipeline section central axis direction, along perpendicular pipeline section work steel pipe circumference dislocation arrangement between two adjacent groups.

Above-mentioned direct burial steam pipeline goes out ground elbow and perpendicular pipeline section connection structure, semicircle annular backup pad is steel sheet material, welds the dress on the outer wall of perpendicular pipeline section work steel pipe.

Above-mentioned direct burial steam pipeline goes out ground elbow and perpendicular pipeline section connection structure, set up the hydrophobic pipe at the direct burial steam pipeline link that goes out ground elbow and underground laid, hydrophobic pipe one end and elbow work steel pipe's bottom intercommunication, the other end and the external environment above the ground intercommunication.

According to the connecting structure of the directly-buried steam pipeline ground outlet elbow and the vertical pipe section, the elbow heat-insulating layer is made of soft heat-insulating materials, the elbow outer protection pipe is made of steel sleeves, the vertical pipe section heat-insulating layer is made of a composite structure of soft heat-insulating materials, hard heat-insulating materials and polyurethane foaming materials, and the vertical pipe section outer protection pipe is made of galvanized iron sheets or steel plates or color steel plates.

The utility model provides a connecting structure of a ground outlet elbow and a vertical pipe section of a direct-buried steam pipeline, wherein an eccentric assembly structure is adopted by a ground extension end elbow working steel pipe and an elbow outer protection pipe of the ground outlet elbow, so that the axial elongation of the direct-buried steam pipeline working steel pipe caused by a thermal effect can be compensated by compressing a soft heat insulation material in a ground extension end heat insulation layer of the ground outlet elbow in the steam pipeline operation process. The rain-proof cover is arranged on the outer wall of the working steel pipe at the ground extending end of the ground outlet elbow, and the rain-proof cover has the advantages that rainwater can be prevented from entering the heat insulation layer of the ground outlet elbow through the rain-proof cover during pipeline laying construction, and the problem that direct assembly is difficult due to different end face structures and materials is solved through the fact that the rain-proof cover is welded with the elbow outer protection pipe and the vertical pipe section outer protection pipe respectively. According to the utility model, the semicircular annular supporting plates are arranged between the working steel pipe of the vertical pipe section and the outer protecting pipe of the vertical pipe section, so that the problem of poor heat preservation effect caused by falling of the heat preservation layer material is avoided, and the heat bridge effect of heat propagation is effectively prevented by a circumferential dislocation arrangement mode between two adjacent semicircular annular supporting plates. In summary, by means of the measures of arranging the rain cover, eccentrically installing the working steel pipe with the ground elbow, arranging the support plates at the vertical pipe section in a staggered manner, the utility model realizes the reliable sealing connection between the directly buried steam pipeline and the vertical pipe section, and achieves the purposes of improving the direct buried construction quality of the steam pipeline and ensuring the stable operation of the urban heat supply pipe network system.

Drawings

FIG. 1 is a schematic diagram of the connection structure of a buried steam pipe outlet elbow and a vertical pipe section according to the present utility model;

FIG. 2 is an enlarged view of the structure at I in FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure A-A of FIG. 1;

FIG. 4 is a schematic view of the sectional structure B-B in FIG. 1.

The reference numerals in the drawings are defined as follows:

1 is an outgoing elbow, 1-1 is an elbow working steel pipe, 1-2 is an elbow heat insulation layer, and 1-3 is an elbow outer protection pipe; 2 is a vertical pipe section, 2-1 is a vertical pipe section working steel pipe, 2-2 is a vertical pipe section heat insulation layer, 2-3 is a vertical pipe section outer protection pipe, 3 is a rain cover, 4 is a water drain pipe, and 5 is a semicircular annular supporting plate.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and specific examples.

Referring to fig. 1, 2 and 4, the utility model provides a connecting structure of a ground outlet elbow and a vertical pipe section of a direct-buried steam pipeline, wherein the ground outlet elbow 1 is sequentially provided with an elbow working steel pipe 1-1, an elbow heat insulation layer 1-2 and an elbow outer protection pipe 1-3 from inside to outside, the elbow heat insulation layer 1-2 adopts a soft heat insulation material, the elbow outer protection pipe 1-3 adopts a steel sleeve, one end of the ground outlet elbow 1 is connected with a direct-buried steam pipeline laid underground, the other end of the ground outlet elbow is vertically extended from the ground and then is connected with the overhead steam pipeline through the vertical pipe section 2, the vertical pipe section 2 is sequentially provided with the vertical pipe section working steel pipe 2-1, the vertical pipe section heat insulation layer 2-2 and the vertical pipe section outer protection pipe 2-3 from inside to outside, the vertical pipe section heat insulation layer 2-2 is of a composite structure of a soft heat insulation material, a hard heat insulation material and a polyurethane foaming material, the vertical pipe section outer protection pipe 2-3 adopts a galvanized iron sheet or a steel sheet material, and the special characteristics are that the elbow working 1-1 at the ground outlet elbow ground outlet end of the ground outlet elbow 1 is connected with the overhead steam pipeline through the vertical pipe section 2-overhead ground outlet pipe, the vertical pipe section 2-3 is provided with the outer pipe section 1-outer protection pipe 1, and the elbow working end of the elbow is arranged at the ground outlet end of the ground outlet elbow 1-outlet elbow 1.

Referring to fig. 1, 2 and 4, the connecting structure of the ground outlet elbow and the vertical pipe section of the direct buried steam pipe is characterized in that a rain cover 3 is in a downward opening shape, the outer edge of the rain cover 3 is lower than the central part, the rain cover 3 plays a role in guiding rainwater, the rain cover 3 is welded with an elbow working steel pipe 1-1 at the ground extension end of the ground outlet elbow 1 in a construction site, an elbow heat insulation layer 1-2 and an elbow outer protection pipe 1-3 at the ground extension end of the ground outlet elbow 1 are completely covered by the rain cover 3, the welding assembly height of the rain cover 3 is determined according to the specific condition of the construction site, and the offset direction of the elbow outer protection pipe 1-3 of the eccentric assembly structure of the ground outlet elbow 1 is consistent with the flow direction of a medium in the steam pipe, as shown in fig. 1 and 4, when the medium in the steam pipe flows from right to left, the central axis of the elbow outer protection pipe 1-3 is offset to left, namely the central axis of the elbow working steel pipe 1-1 is located at the left side of the central axis of the elbow outer protection pipe 1-3.

Referring to fig. 1 and 3, according to the connecting structure of the ground elbow and the vertical pipe section of the directly buried steam pipe, a semicircular annular supporting plate 5 is arranged between a vertical pipe section working steel pipe 2-1 and a vertical pipe section outer protecting pipe 2-3, a plurality of groups of semicircular annular supporting plates 5 are arranged along the central axis direction of the vertical pipe section 2, adjacent groups of semicircular annular supporting plates 5 are arranged in a staggered manner along the circumferential direction of the vertical pipe section working steel pipe 2-1, and the semicircular annular supporting plates 5 are made of steel plates and are welded on the outer wall of the vertical pipe section working steel pipe 2-1.

Referring to fig. 1, in the structure for connecting the ground outlet elbow and the vertical pipe section of the direct-buried steam pipe, a drain pipe 4 is arranged at the connecting end of the ground outlet elbow 1 and the direct-buried steam pipe laid underground, one end of the drain pipe 4 is communicated with the bottom of an elbow working steel pipe 1-1, the other end of the drain pipe is communicated with the external environment above the ground, and the drain pipe 4 is used for draining condensed water at the ground outlet elbow.

Referring to fig. 1 to 4, the utility model provides a connecting structure of a ground outlet elbow and a vertical pipe section of a direct-buried steam pipeline, wherein an eccentric assembly structure is adopted by a ground extension end elbow working steel pipe 1-1 of the ground outlet elbow 1 and an elbow outer protection pipe 1-3, and the axial elongation of the direct-buried steam pipeline working steel pipe caused by a thermal effect can be compensated by compressing a soft heat insulation material in the pipeline operation process. According to the utility model, the rain cover 3 is arranged on the outer wall of the elbow working steel pipe 1-1 at the ground extending end of the ground elbow 1, on one hand, the ground elbow 1 is usually installed in the pipeline laying construction process, after the direct buried steam pipeline is detected to be qualified, the ground elbow is connected with an overhead pipeline through the vertical pipeline section 2, during the period, if rainy weather is met, the rain cover 3 can prevent rainwater from entering into the heat insulation layer of the ground elbow 1, on the other hand, the eccentric assembly structure of the elbow working steel pipe 1-1 and the elbow outer protecting pipe 1-3 enables the upper end face of the elbow outer protecting pipe 1-3 at the ground extending end of the ground elbow 1 to be oval, the vertical pipeline section outer protecting pipe 2-3 is a round bottom face, so that butt joint of the elbow outer protecting pipe 1-3 and the vertical pipeline section outer protecting pipe 2-3 is difficult to realize, and meanwhile, the problem of difficulty in connecting the elbow outer protecting pipe 1-3 and the elbow outer protecting pipe 2-3 is respectively welded through the rain cover 3. According to the utility model, the semicircular annular supporting plates 5 are arranged between the working steel pipes 2-1 of the vertical pipe section and the outer protecting pipes 2-3 of the vertical pipe section, so that the problem of poor heat preservation effect caused by falling of the heat preservation layer material of the vertical pipe section 2 can be avoided, and the heat bridge effect of heat propagation can be effectively prevented by a circumferential dislocation arrangement mode between two adjacent semicircular annular supporting plates 5.

Claims (7)

1. A connecting structure of a ground outlet elbow and a vertical pipe section of a direct-buried steam pipeline is characterized in that an elbow working steel pipe (1-1), an elbow heat-insulating layer (1-2) and an elbow outer protecting pipe (1-3) are sequentially arranged from inside to outside, one end of the ground outlet elbow (1) is connected with a direct-buried steam pipeline laid underground, the other end of the ground outlet elbow is vertically extended from the ground and then connected with the overhead steam pipeline laid through the vertical pipe section (2), the vertical pipe section (2) is sequentially provided with the vertical pipe section working steel pipe (2-1), the vertical pipe section heat-insulating layer (2-2) and the vertical pipe section outer protecting pipe (2-3) from inside to outside, and the connecting structure is characterized in that the elbow working steel pipe (1-1) at the ground extension end of the ground outlet elbow (1) and the elbow outer protecting pipe (1-3) are of an eccentric assembly structure, and a rain shield (3) is arranged on the outer wall of the elbow working steel pipe (1-1) at the ground extension end of the ground outlet elbow (1).

2. The connecting structure of the ground elbow and the vertical pipe section of the direct-buried steam pipeline according to claim 1, wherein the rain cover (3) is downward open, is welded with the elbow work steel pipe (1-1) at the ground extending end of the ground elbow (1) at a construction site, and completely covers the elbow heat insulation layer (1-2) and the elbow outer protecting pipe (1-3) at the ground extending end of the ground elbow (1) by the rain cover (3), and the welding assembly height of the rain cover (3) is matched with the specific condition of the construction site.

3. The connecting structure of the ground outlet elbow and the vertical pipe section of the directly buried steam pipeline according to claim 2 is characterized in that the offset direction of the elbow outer protection pipe (1-3) of the eccentric assembly structure of the ground outlet elbow (1) is consistent with the flow direction of a medium in the steam pipeline.

4. The connecting structure of the directly buried steam pipeline outlet elbow and the vertical pipe section according to claim 3 is characterized in that a semicircular supporting plate (5) is arranged between the vertical pipe section working steel pipe (2-1) and the vertical pipe section outer protecting pipe (2-3), a plurality of groups of semicircular supporting plates (5) are arranged along the central axis direction of the vertical pipe section (2), and the adjacent two groups are arranged in a staggered manner along the circumferential direction of the vertical pipe section working steel pipe (2-1).

5. The connecting structure of the buried steam pipeline outlet elbow and the vertical pipe section according to claim 4, wherein the semicircular annular supporting plate (5) is made of steel plates and welded on the outer wall of the vertical pipe section working steel pipe (2-1).

6. The connection structure of the directly buried steam pipeline ground outlet elbow and the vertical pipe section according to any one of claims 1 to 5, wherein a water drain pipe (4) is arranged at the connection end of the ground outlet elbow (1) and the directly buried steam pipeline laid underground, one end of the water drain pipe (4) is communicated with the bottom of the elbow working steel pipe (1-1), and the other end of the water drain pipe is communicated with the external environment above the ground.

7. The connection structure of the directly buried steam pipeline ground outlet elbow and the vertical pipe section is characterized in that the elbow heat-insulating layer (1-2) is made of soft heat-insulating materials, the elbow outer protecting pipe (1-3) is made of steel sleeves, the vertical pipe section heat-insulating layer (2-2) is made of a composite structure of soft heat-insulating materials, hard heat-insulating materials and polyurethane foaming materials, and the vertical pipe section outer protecting pipe (2-3) is made of galvanized iron sheets or steel plates or color steel plates.