CN214274782U

CN214274782U - Direct-buried nodular cast iron heating pipeline system

Info

Publication number: CN214274782U
Application number: CN202120069385.2U
Authority: CN
Inventors: 徐永华; 靳一; 唐鸿; 刘振波; 许军强
Original assignee: Zhongdian Huite Thermal Design Technical Service Handan Co ltd
Current assignee: Zhongdian Huite Thermal Design Technical Service Handan Co ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-09-24
Anticipated expiration: 2031-01-05

Abstract

The application relates to the field of thermal engineering, in particular to a direct-buried nodular cast iron thermal pipeline system, which comprises nodular cast iron pipes connected end to end and a waterproof assembly connected at the joint of the nodular cast iron pipes; one end of each nodular cast iron pipe is provided with a plug, the other end of each nodular cast iron pipe is provided with a bearing head, and adjacent nodular cast iron pipes are connected through the plug inserted into the bearing heads; the waterproof assembly comprises a waterproof sleeve sleeved outside the joint of the plug and the receiving head, a filling cavity is arranged between the waterproof sleeve and the plug and between the waterproof sleeve and the receiving head, and a waterproof packing layer is filled in the filling cavity. This application pipe connection is on the basis of sealing washer, increases the structure of waterproof cover and waterproof packing layer, has further strengthened pipe-line system's waterproof performance.

Description

Direct-buried nodular cast iron heating pipeline system

Technical Field

The application relates to the field of thermal engineering, in particular to a direct-buried nodular cast iron thermal pipeline system.

Background

At present, the ductile iron pipelines are widely applied to various municipal pipeline engineering, electromechanical installation engineering and outdoor pipeline installation engineering projects in China. Because the ductile cast iron pipe is an ideal material for selecting the tap water pipeline, the ductile cast iron pipe is widely applied to the connection between the tap water and the small-caliber water supply pipe in many areas of China. The most representative flexible interface mode of the nodular cast iron pipe is increasingly widely used in water, gas and oil transportation engineering. The conventional connection of the ductile cast iron water pipe installed by adopting a slide-in type (T-shaped) flexible connector is mainly formed by extruding a matched rubber ring at a pipeline joint to form a whole connection.

Because a flexible interface is adopted, the connected ductile cast iron pipelines do not form a whole body resisting transverse tension like a galvanized pipe connected by a flange or a clamp, so that the joints of the two ductile cast iron pipelines are staggered or bent, and further the water leakage accident of the water pipe is caused.

SUMMERY OF THE UTILITY MODEL

In order to improve the leak protection water performance of nodular cast-iron pipe pipeline joint department, this application provides a formula nodular cast-iron heating power pipe-line system of directly burying.

The application provides a direct-burried spheroidal graphite cast iron heating power pipeline system adopts following technical scheme:

a direct-buried nodular cast iron thermal pipeline system comprises nodular cast iron pipes which are connected end to end and a waterproof assembly connected at the joint of the nodular cast iron pipes;

one end of each nodular cast iron pipe is provided with a plug, the other end of each nodular cast iron pipe is provided with a bearing head, and adjacent nodular cast iron pipes are connected through the plug inserted into the bearing heads;

the waterproof assembly comprises a waterproof sleeve sleeved outside the joint of the plug and the receiving head, a filling cavity is arranged between the waterproof sleeve and the plug and between the waterproof sleeve and the receiving head, and a waterproof packing layer is filled in the filling cavity.

By adopting the technical scheme, on the basis of sealing and waterproofing by inserting the plug into the socket joint between the ductile cast iron pipes through the plug, the waterproof sleeve is added to wrap the joint of the plug and the socket joint to serve as a second-layer waterproof structure, and the waterproof packing layer is filled between the waterproof sleeve and the joint of the plug and the socket joint; when relative displacement occurs between the two ductile cast iron pipes, water leakage occurs between the plug and the receiving head, but the plug and the receiving head are wrapped by the waterproof packing layer to prevent water from leaking out, then the waterproof packing layer is wrapped by the waterproof sleeve on the outer side of the waterproof packing layer to protect the waterproof packing layer from being damaged by water pressure, and therefore the normal operation of the whole pipeline is protected by two layers of waterproof materials.

Optionally, the waterproof jacket is an annular jacket with an opening on the side wall, the outer walls of the two ends of the opening of the waterproof jacket are provided with connecting plates, the waterproof jacket is connected into a closed ring through the connecting plates, and the outer wall of the waterproof jacket is provided with a filling port.

By adopting the technical scheme, the waterproof sleeve is arranged into the open annular sleeve, the waterproof sleeve is conveniently unfolded after the two nodular cast iron pipes are connected, so that the waterproof sleeve is wrapped at the joint of the two nodular cast iron pipes and then connected by the connecting plate, and then the waterproof sleeve is sealed, and the waterproof filler is conveniently filled into the filling cavity after the waterproof sleeve is installed due to the arrangement of the injection port.

Optionally, the outer walls of the plug and the bearing head are provided with limit rings along the circumferential direction, and the inner walls of the two ends of the waterproof sleeve are provided with clamping rings clamped outside the limit rings along the circumferential direction.

Through adopting above-mentioned technical scheme, waterproof cover passes through the rand card in the plug and accepts the junction of head, can prevent that waterproof cover from taking place axial displacement firstly, guarantees its waterproof and function of protection, secondly can restrict the size of filling the chamber, prevents that waterproof filler from outwards revealing in waterproof cover to save material.

Optionally, the waterproof filler layer is an epoxy resin layer or a foam rubber layer.

By adopting the technical scheme, the epoxy resin or the foaming adhesive is used as the filler, so that the waterproof paint is light in weight, low in cost and good in waterproof effect.

Optionally, an annular groove is formed in the inner wall of the receiving head, a sealing ring is arranged in the annular groove, and when the plug is inserted into the receiving head, the sealing ring is sleeved on the plug.

Through adopting above-mentioned technical scheme, the head is accepted in the sealing washer cooperation and plug connection play first waterproof effect.

Optionally, at least one circle of convex ribs are arranged on the bottom surface of the ring groove, and the sealing ring is abutted to the convex ribs.

Through adopting above-mentioned technical scheme, the sealing washer butt can enough strengthen sealing washer and plug and accept the tight performance of supporting between the head on the bead, strengthens sealed effect, can also utilize the bead to block the sealing washer, and when the plug inserted and accepts in the head, can not drive the sealing washer and drunkenness forward.

Optionally, the thickness of the corresponding pipe wall at the bearing head is greater than the thickness of the pipe wall at the pipe body and the plug of the nodular cast iron pipe.

Through adopting above-mentioned technical scheme, the plug inserts and accepts the head after, accepts the head and can receive outside tension, accepts the thickness increase of head, can strengthen the structural strength and the anti deformability who accepts the head, prevents to accept head deformation or fracture.

Optionally, the outside of the ductile cast iron pipe and the waterproof assembly is provided with a heat insulation layer, and the outside of the heat insulation layer is provided with a sheath layer.

Through adopting above-mentioned technical scheme, the heat preservation can play the heat preservation effect to whole pipe-line system, prevents that pipe-line system from being frozen and ftracture even, and the restrictive coating then can protect the heat preservation, prolongs the life of heat preservation.

In summary, the present application includes at least one of the following beneficial technical effects:

1. on the basis of a first layer of waterproof structure of the plug and the bearing head, a waterproof sleeve is added to wrap the joint of the plug and the bearing head to serve as a second layer of waterproof structure, and a waterproof packing layer is filled between the waterproof sleeve and the joint of the plug and the bearing head; when relative displacement occurs between the two ductile cast iron pipes, water leakage occurs between the plug and the receiving head, but the plug and the receiving head are wrapped by the waterproof packing layer to prevent water from leaking out, then the waterproof packing layer is wrapped by the waterproof sleeve on the outer side of the waterproof packing layer to protect the waterproof packing layer from being damaged by water pressure, and therefore the normal operation of the whole pipeline is protected by two layers of waterproof materials.

2. This application waterproof jacket passes through the rand card in the plug and accepts the junction of head, can prevent that waterproof jacket from taking place axial displacement, guarantees its waterproof and protected function, and second can restrict the size of filling the chamber, prevents that waterproof filler from outwards revealing in waterproof jacket to save material.

3. The sealing ring is characterized in that a convex edge is arranged on the bottom surface of the ring groove, the sealing ring is abutted to the convex edge, the abutting performance between the sealing ring and the plug and the connecting head can be enhanced, the sealing effect is enhanced, the sealing ring can be clamped by the convex edge, and when the plug is inserted into the connecting head, the sealing ring cannot be driven to move forwards.

Drawings

Fig. 1 is a schematic sectional structure view of a joint of ductile iron pipes according to an embodiment of the present application.

Fig. 2 is a schematic view of an installation structure of a waterproof jacket in an embodiment of the present application.

Description of reference numerals: 1. a ductile iron pipe; 11. a plug; 12. a bearing head; 13. a limiting ring; 14. a ring groove; 15. a rib; 2. a waterproof jacket; 21. a connecting plate; 22. a material injection port; 23. a collar; 3. filling the cavity; 4. a waterproof packing layer; 5. a seal ring; 6. a heat-insulating layer; 7. a sheath layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a direct-buried nodular cast iron thermal pipeline system. Referring to fig. 1, the pipeline system comprises nodular cast iron pipes 1 which are connected end to end and a waterproof assembly connected at a joint of the nodular cast iron pipes 1, the nodular cast iron pipes 1 are laid into a pipe network according to design requirements, adjacent nodular cast iron pipes 1 are connected through flexible joints, a first waterproof structure is arranged in each joint, and the waterproof assembly is arranged on the outer side of each flexible joint and plays a role of a second waterproof structure.

The outside of nodular cast iron pipe 1 and waterproof component is provided with heat preservation 5, and the outside of heat preservation 6 is provided with restrictive coating 7, and heat preservation 6 adopts rock wool, can play the heat preservation effect to whole pipe-line system, and restrictive coating 7 then can protect heat preservation 6, extension heat preservation 6's life.

One end of the nodular cast iron pipe 1 is provided with a plug 11, the pipe diameter of the plug 11 is the same as that of the nodular cast iron pipe 1, the other end of the nodular cast iron pipe 1 is provided with a bearing head 12, the inner diameter of the bearing head 12 is larger than that of the plug 11, so that the plug 11 can be inserted into the bearing head 12, and adjacent nodular cast iron pipes 1 are connected by inserting the plug 11 into the bearing head 12. The corresponding pipe wall thickness of the bearing head 12 is larger than the pipe wall thickness of the pipe body of the nodular cast iron pipe 1 and the pipe wall thickness of the plug 11, after the plug 11 is inserted into the bearing head 12, the bearing head 12 can be subjected to outward tension, the thickness of the bearing head 12 is increased, and the structural strength and the anti-deformation capacity of the bearing head 12 can be enhanced.

A ring of annular grooves 14 are formed in the inner wall of the bearing head 12, an annular sealing ring 5 is embedded into each annular groove 14, when the plug 11 is inserted into the bearing head 12, the sealing ring 5 is sleeved on the outer wall of the plug 11, and the plug 11 extrudes the sealing ring 5 outwards, so that the sealing ring 5 is abutted against the inner wall of the annular groove 14.

In order to make the sealing ring 5 abut against more tightly, at least one circle of convex ribs 15 are arranged on the bottom surface of the annular groove 14, in this embodiment, a circle of convex ribs 15 are arranged, the sealing ring 5 is greatly deformed at the positions of the convex ribs 15 under the extrusion of the plug 11, and is further compressed, meanwhile, due to the abutting of the convex ribs 15, the axial direction of the sealing ring 5 is also clamped tightly, and the plug 11 cannot drive the sealing ring 5 to move forwards when being inserted into the bearing head 12.

Referring to fig. 1 and 2, the waterproof assembly includes a waterproof sleeve 2 and a waterproof packing layer 4, the waterproof sleeve 2 is a rubber sleeve, the waterproof packing layer 4 is epoxy resin or foam rubber, and the foam rubber is adopted in the embodiment, the waterproof sleeve 2 is sleeved outside the joint of the plug 11 and the receiving head 12. The waterproof sleeve 2 completely covers the plug 11 and the receiving head 12, a filling cavity 3 is formed between the waterproof sleeve and the joint of the plug 11 and the receiving head 12, a waterproof filler layer 4 is filled in the filling cavity 3, and the joint of the plug 11 and the receiving head 12 is sealed externally.

The waterproof jacket 2 is arranged to be an annular jacket with an opening on the side wall, and the opening penetrates through the two ends of the waterproof jacket 2 along the axial direction, so that the waterproof jacket 2 is conveniently unfolded, and the joint of the two nodular cast iron 1 pipes is wrapped. The outer walls of two ends corresponding to the opening of the waterproof sleeve 2 are respectively provided with a connecting plate 21, when the waterproof sleeve 2 is closed, the two connecting plates 21 are abutted and fixedly connected with each other through bolts. In order to conveniently inject the waterproof packing layer 4 into the packing cavity 3, the outer wall of the waterproof jacket 2 is provided with a plurality of injection ports 22, and the plurality of injection ports 22 can be uniformly distributed on the inner wall of the waterproof jacket 2 to achieve a better packing effect.

The plug 11 all is provided with round spacing ring 13 along circumference on the outer wall of joint 12 with the socket, be provided with round rand 23 along circumference on the inner wall at waterproof cover 2 both ends, waterproof cover 2 is installed behind nodular cast-iron pipe 1 junction, rand 23 card is in the outside of two spacing rings 13, firstly can prevent that waterproof cover 2 from taking place axial displacement, guarantee its waterproof and protection's function, secondly can restrict the size of filling chamber 3, prevent that waterproof filler from outwards revealing in waterproof cover 2, thereby save material.

The implementation principle of a direct-buried nodular cast iron thermal pipeline system in the embodiment of the application is as follows: when the pipeline is connected, firstly cleaning the inner wall of the bearing head 12, embedding the sealing ring 5 into the annular groove 14, inserting the plug 11 of another nodular cast iron pipe 1 into the bearing head 12 until the plug abuts against the position of the blocking wall in the bearing head 12; the waterproof sleeve 2 is unfolded and wrapped outside the joint of the plug 11 and the receiving head 12, then the waterproof sleeve 2 is sealed and fixed by screwing bolts, foaming glue is injected into the waterproof sleeve 2 through the injection port 22, the filling cavity 3 is gradually filled with the foaming glue, and the plug 11 and the receiving head 12 are completely wrapped to play a role of second layer of water proofing; and finally, coating an insulating layer 6 and a sheath layer 7 on the outside of the nodular cast iron pipe 1 and the waterproof sleeve 2.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A direct-buried nodular cast iron thermal pipeline system is characterized in that: the ductile cast iron pipe joint comprises ductile cast iron pipes (1) which are connected end to end and a waterproof assembly connected at the joint of the ductile cast iron pipes (1);

one end of each nodular cast iron pipe (1) is provided with a plug (11), the other end of each nodular cast iron pipe is provided with a bearing head (12), and adjacent nodular cast iron pipes (1) are connected through the plugs (11) inserted into the bearing heads (12);

waterproof assembly establishes at plug (11) and accepts outside waterproof cover (2) of first (12) junction including the cover, waterproof cover (2) and plug (11) and accept and be provided with between head (12) and fill chamber (3), it is filled with waterproof packing layer (4) to fill chamber (3) intussuseption.

2. The direct-buried spheroidal graphite cast iron thermodynamic pipeline system according to claim 1, characterized in that: waterproof cover (2) set up to lateral wall open-ended annular cover, all be provided with connecting plate (21) on the both ends outer wall of waterproof cover (2) opening part, waterproof cover (2) connect into closed ring through connecting plate (21), sprue (22) have been seted up on waterproof cover (2) outer wall.

3. The direct-buried spheroidal graphite cast iron thermodynamic pipeline system according to claim 1, characterized in that: the outer walls of the plug (11) and the bearing head (12) are provided with limit rings (13) along the circumferential direction, and the inner walls of the two ends of the waterproof sleeve (2) are provided with clamping rings (23) clamped outside the limit rings (13) along the circumferential direction.

4. The direct-buried spheroidal graphite cast iron thermodynamic pipeline system according to claim 1, characterized in that: the waterproof filler layer (4) is an epoxy resin layer or a foaming adhesive layer.

5. The direct-buried spheroidal graphite cast iron thermodynamic pipeline system according to claim 1, characterized in that: annular groove (14) have been seted up on the inner wall of accepting head (12), be provided with sealing washer (5) in annular groove (14), plug (11) when inserting in accepting head (12), sealing washer (5) cover is established on plug (11).

6. A direct-buried spheroidal graphite cast iron thermodynamic pipeline system according to claim 5, characterized in that: the bottom surface of the ring groove (14) is provided with at least one circle of convex rib (15), and the sealing ring (5) is abutted to the convex rib (15).

7. The direct-buried spheroidal graphite cast iron thermodynamic pipeline system according to claim 1, characterized in that: the corresponding pipe wall thickness of the bearing head (12) is larger than the pipe wall thickness of the nodular cast iron pipe (1) and the pipe wall thickness of the plug (11).

8. The direct-buried spheroidal graphite cast iron thermodynamic pipeline system according to claim 1, characterized in that: and the heat-insulating layer (6) is arranged outside the ductile cast iron pipe (1) and the waterproof assembly, and the sheath layer (7) is arranged outside the heat-insulating layer (6).