CN217714049U - Flexible joint inspection shaft wall of a well and connection structure of pipeline - Google Patents

Abstract

The invention belongs to the technical field of inspection wells, and discloses a connecting structure of a well wall and a pipeline of an inspection well with a flexible joint. The invention solves the conflict relationship between the functionality of the flexible compensation joint and the rigid structure of the inspection well, realizes the radial movement of the pipeline at the well wall of the inspection well of the flexible compensator in the design range, and smoothly transfers the axial displacement of the pipeline system caused by unfavorable geological conditions to the flexible compensator without damaging the pipeline and the well wall of the inspection well.

Description

Flexible joint inspection shaft wall of a well and connection structure of pipeline

Technical Field

The invention belongs to the technical field of inspection wells, and particularly relates to a connecting structure of a well wall and a pipeline of an inspection well with a flexible joint.

Background

In the design of a backfill pipe, when the pipeline arrangement meets the conditions of laying in an earthquake region, penetrating through a movable fracture zone and preventing uneven foundation and settlement, necessary flexible compensation joints are required to be arranged along the pipeline to relieve and resist the influence of complex engineering geological conditions on the operation safety of the pipeline. The flexible compensating joint is arranged in the manhole according to the relevant specification requirement, so that the flexible compensating joint is convenient to overhaul and maintain during the later operation management. The compensating functionality of the flexible compensating joint is contradictory and conflicting with the rigidity of the manhole. In particular to the connection between the well wall and the pipeline of the flexible compensation joint inspection well.

In the prior art, different forms of casings are often adopted in engineering to solve the problem of connection between a pipeline and a pool wall or a well wall. The sleeve pipe mainly plays the pipeline installation of facilitating to can satisfy the requirement of the back stagnant water of installation according to the demand of different projects. However, the installation of the casing and the pipeline on the common pool wall or well wall is a rigid connection structure, the treatment mode can limit the action of the pipeline in the operation process, and after the flexible joint is subjected to external force generated by unfavorable geological conditions or uneven settlement of a foundation, the pipelines on the left side and the right side of the flexible joint can generate different axial deformation, as shown in fig. 1. In the flexible joint inspection well, because the wall of the inspection well has strong rigidity, under the condition of large stress, the flexible joint inspection well is limited at the wall of the inspection well in the stress transmission process, so that the flexible compensation joint cannot effectively exert a function, and concrete at the wall of the inspection well cracks or a pipeline structure is damaged. Therefore, the traditional casing installation mode needs to be optimized and adjusted aiming at the flexible joint inspection well, so that the pipeline can move up and down in a certain range near the wall connection of the inspection well during operation.

Disclosure of Invention

The invention aims to provide a connection structure of a well wall and a pipeline of an inspection well with a flexible joint, and solves the problems that the flexible compensation joint cannot effectively play a role and concrete at the well wall of the inspection well is cracked or the pipeline structure is damaged due to the fact that the flexible compensation joint is limited due to rigid connection between the well wall and the pipeline.

The technical scheme includes that the connecting structure of the well wall of the flexible joint inspection well and the pipeline comprises the well wall, a sleeve pre-embedded in the well wall and the pipeline penetrating in the sleeve, the pipeline can radially move in the sleeve, and the pipeline is provided with an axial limiting structure and a vertical limiting structure.

Preferably, an oil hemp-polyurethane foaming agent layer is arranged between the sleeve and the pipeline.

Preferably, the axial limiting structure comprises an outer gland and an inner gland; the outer gland is fixedly connected with the pipeline; the inner gland is positioned on the inner side of the outer gland and is fixedly connected with the sleeve.

Preferably, rubber gaskets are arranged between the outer gland and the well wall and between the inner gland and the outer gland.

Preferably, vertical limit structure is including setting up the reservation hole on the wall of a well surface, from keeping away from sheathed tube one side to being close to sheathed tube one side in the reservation hole and having set gradually built-in fitting, spacing fender lid, gag lever post, the cover is equipped with the steel ring on the gag lever post, steel ring one end with external pressure lid fixed connection.

Preferably, the limiting rod is fixedly connected with the sleeve.

Preferably, the edge of the outer gland is in an L shape, and a support spring is arranged between the outer gland and the inner gland and filled with oil hemp.

The invention has the beneficial effects that:

(1) The conflict relationship between the functionality of the flexible compensation joint and the rigid structure of the inspection well is solved.

(2) The vertical motion of the pipeline in the design range at the well wall of the inspection well of the flexible compensator can be realized, and the axial displacement of the pipeline system caused by unfavorable geological conditions is smoothly transferred to the flexible compensator without damaging the pipeline and the well wall of the inspection well.

(3) The spring and the oil hemp filler arranged between the inner gland and the outer gland in the non-vertical direction, and the oil hemp-polyurethane foaming agent layer arranged between the sleeve and the pipeline can relieve and prevent the impact deformation of unfavorable geology on a pipeline system near the flexible compensation inspection well.

(4) And the oil hemp-polyurethane foaming agent layer fills a gap between the pipeline and the sleeve, so that the unique properties of porosity, deformability, good water stopping effect and the like of the novel building material are well applied to hydraulic engineering, and a thought is provided for the application of the novel material.

Drawings

FIG. 1 is a schematic illustration of the operational compensation of a flexible compensation joint.

FIG. 2 is a cross-sectional view of a flexible compensating joint manhole.

Fig. 3 is a schematic view of the connection structure at a in fig. 2 taken along an axis in a vertical direction.

Fig. 4 is a schematic view of the connection at a in fig. 2 taken along an axis in a non-vertical direction.

Fig. 5 is a front view of the connection structure of the present invention.

Fig. 6 is an enlarged detail view of the invention at B in fig. 3.

Fig. 7 is a schematic view of the steel ring structure of the present invention.

In the figure: 1. an outer gland; 2. a steel ring; 3. a limiting rod; 4. a limiting blocking cover; 5. a pipeline; 6. embedding parts; 7. a wing ring bushing; 8. an inner gland; 9. a rubber gasket; 10. reserving holes; 11. an end rubber gasket of the outer gland; 12. oil hemp; 13. a support spring; 14. a hemp-polyurethane foaming agent layer; 15. a well cover; 16. stepping; 17. a wellbore; 18. a flexible compensation joint; 19. a concrete cushion; 20. and (5) medium coarse sand bedding.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and more obvious, the technical solutions of the present invention will be described in detail and completely with reference to the accompanying drawings.

The present embodiment is described by taking a double-ball flexible compensation joint as an example, but the present application is not limited to the double-ball flexible compensation joint. As shown in fig. 2, the inspection well comprises a well cover 15, a step 16, a shaft 17, a concrete cushion 19 and the like, wherein a flexible compensation joint 18 is arranged in the inspection well according to relevant requirements, two ends of the flexible compensation joint 18 are connected with pipelines 5, and the pipelines 5 penetrate through the wall of the inspection well and extend out of the inspection well. The connecting structure is arranged at the joint of the well wall of the inspection well and the pipeline 5 and comprises a radial displacement structure, a vertical limiting structure and an axial limiting structure.

The vertical displacement structure comprises an oil hemp-polyurethane foaming agent layer 14, the oil hemp-polyurethane foaming agent layer 14 is arranged between the pipeline and the wing ring sleeve 7, the wing ring sleeve 7 is pre-embedded in the well wall, a spongy foaming agent filler can be formed between the pipeline 5 and the wing ring sleeve 7 after installation, and the oil hemp-polyurethane gap filling material with a large void ratio has the effects of supporting and stopping water for the pipeline 5. Meanwhile, the deformability of the hemp-polyurethane foaming agent provides space possibility for actions of the pipeline 5 in the vertical direction, stress deformation of the pipeline 5 can be relieved, water stopping and inspection well wall rigidity damage prevention effects on the pipeline 5 during deformation are achieved, and the hemp-polyurethane foaming agent is a mature product which can be purchased in the market and is widely applied to the field of buildings.

The axial limiting structure comprises an outer gland 1, an inner gland 8, a rubber gasket 9 and an outer gland end rubber gasket 11. The outer gland 1 is annular, is sleeved on the pipeline 5, and is fixedly connected with the pipeline 5 at the inner ring, as shown in fig. 3 and 4, the edge of the outer gland 1 is L-shaped except the joint of the outer gland and the steel ring 2. And outer glands 1 are arranged on two sides of the well wall of the inspection well. The rubber gasket 11 at the end of the outer gland is arranged at the joint of the outer gland 1 and the wall of the inspection well, so that friction damage is avoided. The inner gland 8 is arranged on the inner side of the outer gland 1, is annular and is fixedly connected with the wing ring sleeve 7, and the inner gland 8 and the wing ring sleeve 7 are fixed in a welding mode in the embodiment. As shown in fig. 6, the rubber gasket 9 is arranged between the inner gland 8 and the outer gland 1, and the rubber gasket 9 and the rubber gasket 11 at the end of the outer gland can effectively relieve the friction force generated during the vertical action of the pipeline 5 in the operation process and play a certain water stopping effect.

As shown in fig. 4, a supporting spring 13 is arranged between the L-shaped edges of the inner gland 8 and the outer gland 1, and the oil hemp 12 is filled in the supporting spring, so that when the structural state of the pipeline 5 close to the inspection well wall is changed due to the vertical action of the pipeline 5, the buffering effect can be achieved, and meanwhile, the waterproof performance of the gland system is improved due to the filling of the oil hemp 12.

The vertical limiting structure comprises a steel ring 2, a limiting rod 3, a limiting stop cover 4, an embedded part 6 and a reserved hole 10. As shown in fig. 3 to 5, two sides of the well wall are both provided with four reserved holes 10, the number of the reserved holes 10 is four along the direction of the vertical shaft section of the pipeline 5, and the embedded part 6, the limiting blocking cover 4 and the limiting rod 3 are sequentially arranged in the reserved holes 10 from one side far away from the wing ring sleeve 7 to one side close to the wing ring sleeve 7; the embedded part 6 is arranged by a rib hooking method, the limiting rod 3 is fixedly connected with the outer wall of the wing ring sleeve 7, and the limiting rod 3 is welded and connected with the wing ring sleeve 7. As shown in fig. 7, one end of the steel ring 2 is provided with a circular through hole, which is sleeved on the limiting rod 3, and the other end is fixedly connected with the end of the external pressure cover 1. The limit stop cover 4 can limit the stroke of the steel ring 2 to exceed the range and prevent the damage to the well wall.

When the flexible compensator works, the displacement generated by the uneven settlement of the pipeline 5 enables the oil hemp-polyurethane foaming agent layer 14 to deform, so that the impact deformation of a pipeline 5 system near the flexible compensation inspection well is relieved, meanwhile, the vertical limiting structure realizes the limiting vertical movement control in the vertical direction, and the pipeline 5 at the wall of the inspection well of the flexible compensator can vertically move within the design range in the operation process.

A medium coarse sand cushion layer 20 is arranged below the flexible compensation joint 18 in the inspection well, the compactness of the medium coarse sand cushion layer is 0.85, and the thickness of the medium coarse sand cushion layer is designed to ensure that the settleable range is larger than the vertical compensation amount of the flexible joint. The medium-coarse sand cushion layer is stressed uniformly, the flexible joint pipeline 5 can be protected from being damaged easily, and better action is achieved.

Claims (7)

1. The connecting structure of the well wall and the pipeline of the flexible joint inspection well is characterized by comprising the well wall, a sleeve embedded in the well wall and a pipeline arranged in the sleeve in a penetrating mode, wherein the pipeline can radially move in the sleeve and is provided with an axial limiting structure and a vertical limiting structure.

2. The structure of claim 1, wherein a layer of a foaming agent is disposed between the casing and the pipeline.

3. The structure of claim 1, wherein the axial limiting structure comprises an outer gland and an inner gland; the outer gland is fixedly connected with the pipeline; the inner gland is positioned on the inner side of the outer gland and is fixedly connected with the sleeve.

4. The structure of claim 3, wherein rubber gaskets are arranged between the outer gland and the well wall and between the inner gland and the outer gland.

5. The structure as claimed in claim 3, wherein the vertical position-limiting structure comprises a pre-embedded part, a position-limiting cover and a position-limiting rod, the pre-embedded part, the position-limiting cover and the position-limiting rod are sequentially arranged in the pre-embedded part from the side far away from the casing to the side close to the casing, the position-limiting rod is sleeved with a steel ring, and one end of the steel ring is fixedly connected with the outer pressing cover.

6. The structure of claim 5, wherein the stop rod is fixedly connected to the casing.

7. The structure as claimed in claim 5, wherein the outer gland has an L-shaped edge, and a support spring is disposed between the outer gland and the inner gland and filled with oil.

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