阅读说明：本技术 一种用于管道防冻检漏的柔性防护单元及防护方法 (Flexible protection unit and protection method for pipeline anti-freezing leakage detection ) 是由 杜昉 王玲玲 余章普 于 2021-08-30 设计创作，主要内容包括：本发明涉及管道领域,具体是涉及一种用于管道防冻检漏的柔性防护单元及防护方法。一种用于管道防冻检漏的柔性防护单元及防护方法,安装在管道上,包括弹性管和弹性保温层；弹性管与管道同轴延伸的设置在管道内部,弹性管与管道之间留有空隙；弹性保温层填充在弹性管与管道之间的空隙之中。本申请通过弹性管和弹性保温层的设置,可以为弹性管内的液体提供充足的保温效果,预防环境温度降低造成弹性管内液体结冻,同时弹性管和弹性保温层具有弹性,可以在弹性管内液体结冻的时候产生弹性形变,为液体结冻提供充足的膨胀空间,起到防止液体结冻膨胀对管道造成损坏的目的。(The invention relates to the field of pipelines, in particular to a flexible protection unit and a protection method for pipeline anti-freezing leakage detection. A flexible protection unit and a protection method for pipeline anti-freezing leakage detection are arranged on a pipeline and comprise an elastic pipe and an elastic heat insulation layer; the elastic pipe and the pipeline extend coaxially and are arranged in the pipeline, and a gap is reserved between the elastic pipe and the pipeline; the elastic heat-insulating layer is filled in the gap between the elastic pipe and the pipeline. This application can provide sufficient heat preservation effect for the liquid in the elastic tube through the setting of elasticity pipe and elasticity heat preservation, and prevention ambient temperature reduces and causes the interior liquid of elastic tube to freeze, and elasticity pipe and elasticity heat preservation have elasticity simultaneously, can produce elastic deformation when the interior liquid of elastic tube freezes, for the liquid freezes provides sufficient inflation space, play and prevent that the liquid from freezing the inflation and causing the purpose of damage to the pipeline.)

1. A flexible protection unit and a protection method for pipeline anti-freezing leakage detection are arranged on a pipeline (1),

it is characterized by comprising an elastic tube (2) and an elastic heat-insulating layer (3);

the elastic pipe (2) and the pipeline (1) coaxially extend and are arranged in the pipeline (1), and a gap is reserved between the elastic pipe (2) and the pipeline (1);

the elastic heat-insulating layer (3) is filled in the gap between the elastic pipe (2) and the pipeline (1).

2. The flexible protection unit and the protection method for pipeline anti-freezing leakage detection according to claim 1, further comprising a connection joint (4), wherein the outer diameter of the interface of the connection joint (4) is larger than the inner diameter of the elastic pipe (2), and the opening of the elastic pipe (2) is sleeved on the interface of the connection joint (4).

3. The flexible protection unit and the protection method for pipeline anti-freezing and leak detection according to claim 2 are characterized in that the joint of the elastic pipe (2) and the connecting joint (4) is locked by a hoop (8).

4. The flexible protection unit and the protection method for pipeline anti-freezing leakage detection according to claim 2 are characterized by further comprising a clamping sleeve (6), wherein the lengths of the elastic pipe (2) and the elastic insulation layer (3) are smaller than the length of the pipeline (1), and the openings of the elastic pipe (2) and the elastic insulation layer (3) are in the opening of the pipeline (1);

the cutting ferrule (6) comprises a butting part (6a) and a surrounding part (6b), the surrounding part (6b) is cylindrical, the inner diameter of the surrounding part (6b) is equal to the outer diameter of the pipeline (1), and the surrounding part (6b) is sleeved on the pipeline (1) in a way of being matched with the pipeline (1);

the abutting part (6a) is in a disc shape with a circular hole in the middle, the circle center of the circular hole of the abutting part (6a) is in the same point with the circle center of the abutting part (6a), the diameter of the circular hole of the abutting part (6a) is equal to the outer diameter of the connecting joint (4), the circle center of the abutting part (6a) is located on the axis of the surrounding part (6b), the abutting part (6a) is arranged at one end of the surrounding part (6b), the abutting part (6a) abuts against the opening of the pipeline (1), and the connecting joint (4) penetrates through the circular hole of the abutting part (6 a).

5. The flexible protection unit and the protection method for pipeline anti-freezing and leak detection according to claim 1 are characterized by further comprising a heating cable (5), wherein the heating cable (5) is coaxially arranged in the elastic tube (2) in an extending mode and is arranged in the elastic tube (2).

6. The flexible protection unit and the protection method for pipeline anti-freezing leakage detection according to claim 5, characterized by further comprising a connection joint (4), wherein the outer diameter of the interface of the connection joint (4) is larger than the inner diameter of the elastic pipe (2), and the opening of the elastic pipe (2) is sleeved on the interface of the connection joint (4);

the side wall of part of the connecting joint (4) is provided with a cable hole, and the heating cable (5) passes through the cable hole.

7. The flexible protection unit and the protection method for pipeline antifreeze leak detection according to claim 6, wherein both ends of the heating cable (5) respectively extend out of cable holes of the two connecting joints (4).

8. The flexible protection unit and the protection method for pipeline antifreeze leak detection according to claim 6, characterized in that the heating cable (5) is a double-conductor heating cable, the heating cable (5) passes through a cable hole of one connecting joint (4), and the end of the heating cable (5) is arranged in the elastic tube (2).

9. The flexible protection unit and the protection method for pipeline antifreeze leak detection according to claim 8, characterized in that the end of the heating cable (5) is connected to the connecting joint (4).

10. The flexible protection unit and the protection method for pipeline anti-freezing leakage detection according to claim 1 are characterized by further comprising a liquid leakage alarm device (7), wherein the liquid leakage alarm device (7) comprises a liquid sensing belt (7a) and a leakage detection controller (7b), the liquid sensing belt (7a) is in signal connection with the leakage detection controller (7b), and the liquid sensing belt (7a) is arranged right below the pipeline (1) along the extending direction of the pipeline (1).

Technical Field

The invention relates to the field of pipelines, in particular to a flexible protection unit and a protection method for pipeline anti-freezing leakage detection.

Background

Liquid conduits are an important path for liquid transport. Fire-fighting pipelines are arranged in tunnels and subways, water supply pipelines are arranged in chemical plants and residential areas, and the pipelines play an important role in production and life.

When ambient temperature is lower, the inside liquid of these pipelines often freezes to freeze easily, influences normal liquid circulation on the one hand, and the volume can grow when on the other hand liquid freezes the inflation, and the pipeline can be broken to the inflation liquid can expand, causes economic loss, influences normal production life.

In order to prevent the liquid from freezing and breaking the pipeline, water pipes for residents often stop when the water consumption is low and the ambient temperature suddenly drops at night in cold seasons. However, if the liquid in the pipeline is not drained completely, or the water consumption is low and the ambient temperature suddenly drops in the daytime, the liquid in the pipeline can be frozen and expanded, so that the pipeline is damaged. In order to resist freezing, the pipeline is sleeved with an insulating material to keep the temperature of liquid in the pipeline, but the temperature reduction of the environment is long, and the insulating material can not achieve a sufficient anti-freezing effect.

Disclosure of Invention

In order to solve the technical problems, a flexible protection unit and a protection method for preventing the pipeline from freezing and detecting the leakage are provided,

in order to achieve the above purposes, the technical scheme adopted by the invention is as follows:

a flexible protection unit and a protection method for preventing freezing and detecting leakage of a pipeline are arranged on the pipeline,

comprises an elastic pipe and an elastic heat-insulating layer;

the elastic pipe and the pipeline extend coaxially and are arranged in the pipeline, and a gap is reserved between the elastic pipe and the pipeline;

the elastic heat-insulating layer is filled in the gap between the elastic pipe and the pipeline.

Preferably, the device further comprises a connecting joint, the outer diameter of a connector of the connecting joint is larger than the inner diameter of the elastic tube, and an opening of the elastic tube is sleeved on the connector of the connecting joint.

Preferably, the joint of the elastic tube and the connection joint is locked by a ferrule.

Preferably, the heat insulation pipe also comprises a clamping sleeve, the length of the elastic pipe and the elastic heat insulation layer is less than that of the pipeline, and the openings of the elastic pipe and the elastic heat insulation layer are arranged in the opening of the pipeline;

the clamping sleeve comprises a butting part and a surrounding part, the surrounding part is cylindrical, the inner diameter of the surrounding part is equal to the outer diameter of the pipeline, and the surrounding part is sleeved on the pipeline in a way of being matched with the pipeline;

the butt joint portion is the discoid of centre division circular port, and the centre of a circle of butt joint portion circular port and the centre of a circle of butt joint portion are concurrent, and the diameter of the circular port of butt joint portion equals the external diameter of attach fitting, and the centre of a circle of butt joint portion is on the axis of surrounding part, and the butt joint portion sets up the one end in surrounding part, and the butt joint portion supports at the opening part of pipeline, and the attach fitting passes from the butt joint circular port.

Preferably, the heating device further comprises a heating cable, and the heating cable is arranged in the elastic tube and extends coaxially with the elastic tube.

Preferably, the device also comprises a connecting joint, the outer diameter of the interface of the connecting joint is larger than the inner diameter of the elastic tube, and the opening of the elastic tube is sleeved on the interface of the connecting joint;

and cable holes are formed in the side walls of part of the connecting joints, and the heating cable penetrates through the cable holes.

Preferably, both ends of the heating cable protrude from the cable holes of the two connection terminals, respectively.

Preferably, the heating cable is a double-conductor heating cable, the heating cable passes through a cable hole of one connecting joint, and the tail end of the heating cable is arranged in the elastic tube.

Preferably, the end of the heating cable is connected to the connection terminal.

Preferably, the pipeline leakage monitoring device further comprises a liquid leakage alarming device, the liquid leakage alarming device comprises a liquid sensing belt and a leakage detection controller, the liquid sensing belt is in signal connection with the leakage detection controller, and the liquid sensing belt is arranged right below the pipeline along the extending direction of the pipeline.

Compared with the prior art, the application has the beneficial effects that:

1. this application can provide sufficient heat preservation effect for the liquid in the elastic tube through the setting of elasticity pipe and elasticity heat preservation, and prevention ambient temperature reduces and causes the interior liquid of elastic tube to freeze, and elasticity pipe and elasticity heat preservation have elasticity simultaneously, can produce elastic deformation when the interior liquid of elastic tube freezes, for the liquid freezes provides sufficient inflation space, play and prevent that the liquid from freezing the inflation and causing the purpose of damage to the pipeline.

2. This application passes through attach fitting's setting, and the elasticity pipe box is on attach fitting, and attach fitting is connected with normal valve and water supply pipe again, plays the purpose that realizes elasticity pipe and normal water supply pipe and be connected.

3. This application plays the reinforcing effect to the junction of elasticity pipe and attach fitting through the setting of ferrule, prevents the junction infiltration of elasticity pipe and attach fitting.

4. This application prevents that elasticity pipe and elasticity heat preservation from barely exposing the pipeline through the setting of cutting ferrule to external environment causes the damage to elasticity pipe and elasticity heat preservation.

5. This application passes through heating cable's setting, heats the intraductal liquid of elasticity, can prevent on the one hand that the intraductal liquid of elasticity from freezing, and on the other hand can play the supplementary effect of unfreezing when the intraductal liquid of elasticity freezes.

6. This application passes from the cable hole through the setting of cable hole, heating cable, realizes the purpose of heating cable connection commercial power.

7. This application stretches out in two attach fitting's the cable hole through heating cable both ends respectively, has realized the installation of heating cable in the elastic tube.

8. This application is through adopting two heat cable that lead when heating cable, and heating cable's end connection has realized that heating cable only when passing through a cable hole, relatively fixed installs the purpose in the elastic tube on connecting joint.

9. This application has realized the function whether the check pipeline takes place the weeping through liquid leakage alarm device's use.

Drawings

FIG. 1 is a side view of an elastomeric pipe and elastomeric insulation in a duct embodying the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

FIG. 3 is a side view of one implementation of the present invention;

FIG. 4 is a schematic illustration of the location of an elastomeric tube, connector fitting, clip and heating cable embodying the present invention;

FIG. 5 is a schematic view of a heating cable embodying the present invention in a first installation;

FIG. 6 is a schematic view of a heating cable embodying the present invention in a second installation;

FIG. 7 is a first embodiment of a connection between a heating cable embodying the present invention and a connector fitting in a second embodiment;

FIG. 8 is a second embodiment of a connection of a heating cable embodying the present invention to a connector in a second installation;

FIG. 9 is a side view of a heating cable embodying the present invention using a single conductor heating cable;

FIG. 10 is a cross-sectional view taken at B-B of FIG. 9;

FIG. 11 is a schematic side view of an electrical heating wire using a dual conductor heating cable to implement the heating cable of the present invention;

FIG. 12 is an enlarged view of a portion of FIG. 11 at C;

FIG. 13 is a connection fitting of the dual interface type embodying the present invention;

FIG. 14 is a three-interface type connection fitting embodying the present invention;

FIG. 15 is a coupling fitting with a cable tube embodying the present invention;

figure 16 is a perspective view of a ferrule embodying the present invention;

fig. 17 is a rear view of a ferrule embodying the present invention;

the reference numbers in the figures are:

1-a pipeline;

2-an elastic tube;

3-an elastic heat-insulating layer;

4-connecting a joint; 4 a-a cable tube; 4 b-a first coupling ring; 4 c-a retaining ring;

5-a heating cable; 5 a-insulating waterproof layer; 5 b-an electric heating wire;

6-cutting the ferrule; 6 a-an abutment; 6 b-a surround;

7-liquid leakage alarm device; 7 a-liquid sensing strip; 7 b-a leakage detection controller;

8-a hoop;

9-a locking ring; 9 a-a second connecting loop;

10-valve.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

In order to solve the technical problem that when the ambient temperature is reduced, if the liquid in the pipeline does not flow or is drained completely, the liquid in the pipeline can freeze and expand, and the pipeline wall is easy to crack, as shown in fig. 1 and 2, the following preferred technical solutions are provided:

a flexible protection unit and a protection method for pipeline anti-freezing and leakage detection are arranged on a pipeline 1,

comprises an elastic tube 2 and an elastic heat-insulating layer 3;

the elastic tube 2 and the pipeline 1 extend coaxially and are arranged in the pipeline 1, and a gap is reserved between the elastic tube 2 and the pipeline 1;

the elastic heat-insulating layer 3 is filled in the gap between the elastic pipe 2 and the pipeline 1.

Specifically, the elastic pipe 2 is made of waterproof rubber, and the elastic heat-insulating layer 3 is made of rubber-plastic sponge heat-insulating material.

Rubber-plastic sponge heat-insulating material, namely rubber-plastic heat-insulating cotton. The cotton elasticity preferred of rubber and plastic heat preservation, advantage such as the heat preservation effect is better, in order to keep the inside liquid temperature of pipeline 1, perhaps prevent that the inside liquid of pipeline 1 from freezing, traditional way will be with the pipeline shape rubber and plastic heat preservation cotton cover that agrees with pipeline 1 outer wall on pipeline 1, provide the heat preservation for the inside liquid of pipeline 1. For urban water supply, when the environmental temperature is near or above the freezing point, the rubber and plastic heat-insulating cotton can ensure the temperature of a water source in the pipeline 1 and prevent water in the pipeline 1 from being frozen below the freezing point. However, when the environmental temperature continues to decrease, the rubber-plastic heat-insulating cotton cannot perform a sufficient heat-insulating function, and at this time, the water source in the pipeline 1 inevitably freezes and expands, and the pipeline 1 is broken, so that damage is caused. And the rubber-plastic heat-insulating cotton cannot be directly used as a water supply pipeline.

In this embodiment, water flows through the elastic pipe 2, and the elastic heat-insulating layer 3 plays a heat-insulating role in the water flow of the elastic pipe 2. Because the material of elastic tube 2 and elasticity heat preservation 3 is softer, easily takes place elastic deformation, when carrying liquid, liquid has great gravity, can cause the middle part of elastic tube 2 and elasticity heat preservation 3 because liquid gravity tenesmus, causes the harm to elastic tube 2 and elasticity heat preservation 3, so elastic tube 2 and elasticity heat preservation 3 are difficult to play the effect of water supply alone. The elastic tube 2 and the elastic insulation layer are installed in the conventional pipe 1, and the pipe 1 can provide sufficient supporting force for the elastic tube 2 and the elastic insulation layer 3.

When the ambient temperature suddenly drops, the temperature of the water flow in the elastic pipe 2 still keeps the original temperature, and the elastic heat-insulating layer 3 can delay the heat exchange between the water in the elastic pipe 2 and the outside, thereby playing the role of heat insulation and freezing prevention. When the inside water of elastic tube 2 freezes because the low temperature, the water inflation of freezing because elastic tube 2 and elasticity heat preservation 3 all have elasticity, so can extrude elastic tube 2 and elasticity heat preservation 3 when the water inflation of freezing, elastic deformation takes place for elastic tube 2, the cross-sectional area grow of circulation face, 3 elastic deformation volume diminishes of elasticity heat preservation, thereby for the water inflation of freezing provides sufficient buffer space, the pressure that 1 inner wall of very big reduction pipeline bore, prevent to lead to the fact destruction to pipeline 1. The elastic tube 2 and the elastic heat-insulating layer 3 provide sufficient space for the liquid to expand.

Elastic tube 2 and elasticity heat preservation 3 can the direct mount in current pipeline 1, also can with the supporting finished product of producing of pipeline 1, when needs to prevent frostbite to current pipeline 1 and reform transform, partial cross section is great, and the less pipeline 1 of water supply pressure, can be directly at elastic tube 2 and elasticity heat preservation 3 of its internally mounted, reform transform under the circumstances that does not influence 1 water supply ability of pipeline in the assurance, can reduce the cost.

In the existing production technology, the rubber-plastic sponge heat-insulating material is directly produced into a pipeline shape, namely the elastic heat-insulating layer 3; later with the elasticity pipe 2 suit among the elasticity heat preservation 3, in the face of the pipeline 1 that waits to reform transform, stretch into the elasticity heat preservation 3 that has the elasticity pipe 2 from the one end of pipeline 1, until the other end of elasticity heat preservation 3 arrival pipeline 1, just can accomplish the process of installing elasticity pipe 2 and elasticity heat preservation 3 in pipeline 1, accomplish the transformation to current pipeline 1.

In order to solve the technical problem of how to connect the pipeline 1 with the normal pipeline and the valve at the opening of the pipeline 1 to ensure that the water flow can not leak and transition from the elastic pipe 2 to other pipelines, as shown in fig. 4 and 5, the following preferred technical solutions are provided:

the pipe joint further comprises a connecting joint 4, the outer diameter of a joint of the connecting joint 4 is larger than the inner diameter of the elastic pipe 2, and an opening of the elastic pipe 2 is positioned on the joint of the connecting joint 4.

Specifically, the connection joint 4 is made of a hard material, can be made of plastic, or can be made of metal, and the material of the connection joint 4 is selected according to actual requirements. The elastic pipe 2 is sleeved on the connecting joint 4, so that the elastic pipe 2 and the connecting joint 4 can be clamped tightly, and water leakage is prevented.

The external diameter of attach fitting 4 interface is greater than the internal diameter of elastic tube 2, because elastic tube 2 is made of rubber materials, has very strong elasticity, so when elastic tube 2 overlaps on attach fitting 4, elastic tube 2 can produce elastic deformation, and this elastic deformation can produce great pressure to attach fitting 4's outer wall in the junction with attach fitting 4, pressure can prevent to a certain extent that rivers from overflowing from the junction of elastic tube 2 and attach fitting 4.

The connecting joint 4 has various styles, can be a straight double connector, a bent double connector or a three-connector, so as to meet the requirements of pipeline nodes, play a role in guiding the flow direction of liquid, and select the style of the connecting joint 4 according to specific use scenes in actual use. As shown in fig. 13, the double-interface connection joint 4 is bent; as shown in fig. 14, the connection joint 4 is a three-port connection joint.

After the connecting joint 4 is connected to the elastic tube 2, the connecting joint 4 is connected to another pipeline or a valve 10, in this embodiment, as shown in fig. 3, the connecting joint 4 is connected to the valve 10, and the valve 10 is connected to another pipeline.

In order to solve the technical problems that the joint of the elastic tube 2 and the connection joint 4 is easy to be penetrated by water only by the elasticity of the elastic tube 2, and the connection between the elastic tube 2 and the connection joint 4 is easy to slip when the water flowing through the elastic tube 2 is too large, or when the inside of the elastic tube 2 is frozen and expanded, or when the elastic tube 2 is subjected to other external force, as shown in fig. 4, the following preferred technical solutions are provided:

the joint of the elastic tube 2 and the connecting joint 4 is locked by a hoop 8.

Specifically, the hoop 8 is used for reinforcement, so that the space between the elastic pipe 2 and the connecting joint 4 can be reinforced, and the elastic pipe 2 and the connecting joint 4 are prevented from slipping off. And the hoop 8 is convenient to install, mature in technology, low in price and capable of playing an excellent reinforcing role.

As shown in fig. 4, a double-layered ferrule 8 is used at the joint of the elastic tube 2 and the joint fitting 4. The single-layer hoop 8 cannot play a sufficient role in fixing, and water is easily seeped at the joint of the elastic pipe 2 and the connecting joint 4; the double-layer hoop 8 can play a role in sufficient fixing and water seepage prevention. The three-layer or more than three-layer hoop 8 has low economic benefit, so the double-layer hoop 8 is selected.

In order to solve at the opening part of pipeline 1, elastic tube 2 and elasticity heat preservation 3 expose, firstly pleasing to the eye inadequately, elastic tube 2 and elasticity heat preservation 3 directly expose and cause the harm to corrode elastic tube 2 and elasticity heat preservation 3 easily outward, lead to elastic tube 2 and the 3 intensity reduction of elasticity heat preservation easily, the technical problem that takes place the circumstances such as heat preservation effect to descend, weeping easily is shown in fig. 3, 16, 17, provides following preferred technical scheme:

the pipe is characterized by further comprising a clamping sleeve 6, wherein the lengths of the elastic pipe 2 and the elastic heat-insulating layer 3 are smaller than that of the pipeline 1, and the openings of the elastic pipe 2 and the elastic heat-insulating layer 3 are arranged in the opening of the pipeline 1;

the ferrule 6 comprises a butting part 6a and a surrounding part 6b, the surrounding part 6b is cylindrical, the inner diameter of the surrounding part 6b is equal to the outer diameter of the pipeline 1, and the surrounding part 6b is sleeved on the pipeline 1 in a way of being matched with the pipeline 1;

the abutting portion 6a is in a disc shape with a circular hole in the middle, the circle center of the circular hole of the abutting portion 6a is in the same point as that of the abutting portion 6a, the diameter of the circular hole of the abutting portion 6a is equal to the outer diameter of the connecting joint 4, the circle center of the abutting portion 6a is located on the axis of the surrounding portion 6b, the abutting portion 6a is arranged at one end of the surrounding portion 6b, the abutting portion 6a abuts against the opening of the pipeline 1, and the connecting joint 4 penetrates through the circular hole of the abutting portion 6 a.

Specifically, the length of elastic tube 2 and elastic heat-insulating layer 3 is less than the length of pipeline 1, and the opening of elastic tube 2 and elastic heat-insulating layer 3 provides the space for the installation of cutting ferrule 6 in the opening of pipeline 1.

The surrounding part 6b and the abutting part 6a are integrated, and the clamping sleeve 6 is formed together; rely on the frictional force card between encirclement portion 6b and the pipeline 1 to be in the same place, support the opening part at pipeline 1 through butt portion 6a, the diameter of butt portion 6 a's circular port equals the external diameter of attach fitting 4, attach fitting 4 passes from butt portion 6a circular port, the purpose that covers the gap between attach fitting 4 and the pipeline 1 completely has been realized, seal elastic tube 2 and elasticity heat preservation 3 totally, prevent elastic tube 2 and the 3 direct contact external environment of elasticity heat preservation, prevent that elastic tube 2 and elasticity heat preservation 3 from suffering external environment's damage.

The abutting part 6a can isolate the elastic tube 2 and the elastic heat-insulating layer 3 from the outside of the pipeline 1, so that the elastic tube 2 and the elastic heat-insulating layer 3 can not be exposed outside, and the effect of fixing the positions of the elastic tube 2 and the elastic heat-insulating layer 3 is achieved to a certain extent.

In order to solve the ambient temperature dip, the inside water of elastic tube 2 freezes the back, can't carry out normal water delivery work, perhaps when the temperature warms up again, elasticity heat preservation layer 3 can keep warm to the water that freezes on the contrary, delays the technical problem that the water that freezes unfreezes, as shown in fig. 5, 6, provide following preferred technical scheme:

and a heating cable 5, wherein the heating cable 5 is coaxially arranged in the elastic tube 2 and extends with the elastic tube 2.

Specifically, the outer layer of the heating cable 5 has insulation and waterproof properties.

When the ambient temperature suddenly drops and the liquid in the elastic tube 2 is at the risk of freezing, the heating cable 5 is connected with a power supply to perform auxiliary heating on the liquid in the elastic tube 2, so that the liquid is prevented from freezing. Simultaneously elastic heat preservation layer 3 can keep warm to the liquid in the elastic tube 2, delays the liquid in the elastic tube 2 and the heat exchange before the outside, prevents that the liquid in the elastic tube 2 from freezing.

When the liquid in the elastic tube 2 is frozen, the heating cable 5 is connected with a power supply to heat the frozen liquid in the elastic tube 2 to assist in thawing.

In order to solve the technical problem of how to switch on the external power supply when the heating cable 5 is laid in the elastic tube 2, as shown in fig. 5 and 15, the following preferable technical solutions are provided:

the outer diameter of the interface of the connecting joint 4 is larger than the inner diameter of the elastic tube 2, and the opening of the elastic tube 2 is positioned on the interface of the connecting joint 4;

the side wall of part of the connecting joint 4 is provided with a cable hole, and the heating cable 5 passes through the cable hole.

Specifically, the laying of the heating cable 5 is not a pipeline, and one heating cable can be shared in a plurality of mutually communicated elastic pipes 2 according to actual conditions, and at the moment, only the inlet end of the heating cable 5 needs to pass through the connecting joint 4.

A cable tube 4a is further provided at the cable hole of the connection nipple 4, the cable tube 4a extends from the cable hole, and the heat generating cable 5 passes through the cable hole and the cable tube 4 a. Waterproof glue is filled in gaps among the connecting joint 4, the cable holes and the cable tubes 4a, and water seepage is prevented under the condition that the heating cable 5 is connected with the outside. The cable hole is used for the heating cable 5 to pass through; the cable tube 4a has a certain length, and a gap between the cable tube 4a and the heating cable 5 is filled with sufficient waterproof glue to prevent liquid from leaking out.

The heating cable 5 is connected to a power source at a portion outside the connection fitting 4 and the elastic tube 2 by passing the heating cable 5 through the cable hole, and a portion of the heating cable 5 inside the elastic tube 2 is used for heating work.

In order to solve the technical problem of how to lay the heating cable 5 in the elastic tube 2, as shown in fig. 4 and 5, the following preferred technical solutions are provided:

two mounting methods are provided, the first mounting method:

both ends of the heating cable 5 are respectively protruded from the cable holes of the two connection terminals 4.

Specifically, the heating cable 5 is divided into a single-conductor heating cable and a double-conductor heating cable, the single-conductor heating cable is also called a single-conductor heating cable, and the double-conductor heating cable is also called a double-conductor heating cable; the structure of the heating cable 5 can be roughly divided into an insulating waterproof layer 5a as an outer layer and an electric heating wire 5b wrapped in the insulating waterproof layer 5 a.

If the heating cable 5 is a single-conductor type heating cable, only one electric heating wire 5b is arranged in the insulating waterproof layer 5a on the cross section of the heating cable 5. Both ends of the heating cable 5 need to be connected with a power supply.

If the heating cable 5 adopts a double-conductor type heating cable, two parallel electric heating wires 5b are arranged in the insulating waterproof layer 5a on the cross section of the heating cable 5. Only one end of the heating cable 5 is connected with the mains supply; at the end not connected with the commercial power, the two parallel electric heating wires 5b are electrically connected. The double-conductive heating cable can also be regarded as an electric heating wire 5b, which extends from the starting end of the insulating waterproof layer 5a to the tail end of the insulating waterproof layer 5a, and the electric heating wire 5b is bent at the tail end of the insulating waterproof layer 5a and then extends to the starting end of the insulating waterproof layer 5a along the original path.

The first mounting method can mount either the heating cable 5 of the single conductor type or the heating cable 5 of the double conductor type. So that the middle section of the heating cable 5 is in the elastic tube 2 and both ends of the heating cable 5 are projected to the outside from the cable hole. If the double-conductor heating cable is adopted, only one end is connected with electricity. If the cable is a single-conductor heating cable, the two ends are respectively connected with electricity.

In the first installation method, as shown in fig. 4, both ends of the heating cable 5 respectively extend out of the cable holes of the two connection terminals 4, the portion of the heating cable 5 in the elastic tube 2 is approximately straightened, and the cable holes of the two connection terminals 4 fix the heating cable 5 to prevent the heating cable 5 from being displaced.

Only for the heating cable 5 being a single conductor heating cable, a second mounting method is provided:

the heating cable 5 is a double-conductor heating cable, the heating cable 5 passes through a cable hole of one connecting joint 4, and the tail end of the heating cable 5 is arranged in the elastic tube 2.

Fig. 6 is a schematic view of a second mounting method.

In order to solve the technical problem that when the second installation method is used, the heating cable 5 starts from the position 1, if the laying direction is opposite to the water flow, the water flow can drive the heating cable 5, the heating cable 5 is bent and knotted, and the effective use length of the heating cable 5 is reduced, as shown in fig. 6, 7 and 8, the following preferred technical solutions are provided:

the end of the heating cable 5 is connected to the connection terminal 4.

Specifically, the heating cable 5 and the connection joint 4 have multiple connection modes:

first, as shown in fig. 7, the heating cable 5 is sleeved in the locking ring 9 by connecting the locking ring 9 through the locking ring 9, wherein the locking ring 9 is a hollow cylindrical metal ring with an inner diameter equal to the outer diameter of the cross section of the heating cable 5, and the heating cable 5 is connected with the locking ring 9 by virtue of the friction force between the heating cable 5 and the locking ring 9. The lock ring 9 is provided with a second connecting ring 9a, the connecting joint 4 is internally provided with a first connecting ring 4b, and the second connecting ring 9a and the first connecting ring 4b are mutually sleeved together to form a chain structure.

In the second connection mode, as shown in fig. 8, a fixing ring 4c is provided in the connection terminal 4, the fixing ring 4c is welded in the connection terminal 4, the heating cable 5 passes through the fixing ring 4c, and the heating cable 5 and the fixing ring 4c are clamped together by friction.

The connection of the end of the heating cable 5 to the connector 4 may be performed in various ways, not limited to the first connection way and the second connection way.

In order to solve the technical problem of how to check the liquid leakage in the pipeline 1, as shown in fig. 3, the following preferred technical solutions are provided:

the pipeline leakage alarm device is characterized by further comprising a liquid leakage alarm device 7, wherein the liquid leakage alarm device 7 comprises a liquid sensing belt 7a and a leakage detection controller 7b, the liquid sensing belt 7a is in signal connection with the leakage detection controller 7b, and the liquid sensing belt 7a is arranged right below the pipeline 1 along the extending direction of the pipeline 1.

Specifically, the liquid induction belt 7a is a positioning type conductive liquid induction belt, and when liquid touches the liquid induction belt 7a, the liquid induction belt 7a transmits information such as the position of the liquid to the liquid leakage detection controller 7 b; the liquid leakage detection controller is provided with a screen and a buzzer. The controller liquid sensing belt 7a and the leakage detection controller 7b are mature objects on the market and are not further described herein.

When the liquid induction belt 7a detects that liquid leakage occurs, a liquid leakage position signal is sent to the liquid leakage detection controller 7b, the liquid leakage detection controller 7b can display liquid leakage information on a screen, and meanwhile, a buzzing alarm is sent out to timely remind a user to check liquid leakage points.

Through the setting of elastic tube 2 and elasticity heat preservation 3, can provide sufficient heat preservation effect for the liquid in the elastic tube 2, the prevention ambient temperature reduces and causes the interior liquid of elastic tube 2 to freeze, and elastic tube 2 and elasticity heat preservation 3 have elasticity simultaneously, can produce elastic deformation when the interior liquid of elastic tube 2 freezes, play and prevent that the liquid from freezing the inflation and causing the purpose of damage to pipeline 1. Through the setting of attach fitting 4, the elastic tube 2 cover is on attach fitting 4, and attach fitting 4 is connected with normal valve and water supply pipe again, plays the purpose that realizes elastic tube 2 and normal water supply pipe and is connected. The joint of the elastic pipe 2 and the connecting joint 4 is reinforced by the arrangement of the hoop 8. Through the setting of cutting ferrule 6, prevent that elastic tube 2 and elastic heat preservation 3 from barely exposing pipeline 1, cause the damage to elastic tube 2 and elastic heat preservation 3.

Through heating cable 5's setting, heat elastic tube 2 interior liquid, can prevent on the one hand that elastic tube 2 interior liquid from freezing, on the other hand can play the supplementary effect of unfreezing when elastic tube 2 interior liquid freezes. Through the setting of cable hole, heating cable 5 passes from the cable hole, realizes the purpose that heating cable 5 connects the commercial power. The installation of the heating cable 5 in the elastic tube 2 is realized by the two ends of the heating cable 5 respectively extending out of the cable holes of the two connection joints 4. When the heating cable 5 adopts a double-conductor heating cable, the tail end of the heating cable 5 is connected to the connecting joint 4, so that the heating cable 5 is relatively and fixedly arranged in the elastic tube 2 only through one cable hole.

By using the liquid leakage alarm device 7, the function of checking whether the liquid leakage occurs in the pipeline 1 is realized.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.