A bidirectional expansion and contraction warning bellows

Abstract

The invention discloses a bidirectional telescopic and expandable early warning bellows, which belongs to the field of bellows. The bidirectional telescopic and expandable early warning bellows can achieve, through the arrangement of a thermal expansion bag, that when the temperature is too high during transportation, the heat transfer block guides the heat into the thermal expansion bag, so that the air expands due to the heat, thereby driving the thermal expansion bag to deform and expand, so that the bellows can deform in the lateral and radial directions at the same time. Compared with the lateral deformation only, the lateral deformation force of the thermal expansion is dispersed, thereby effectively protecting the bellows from damage due to excessive deformation in the lateral direction. At the same time, through the arrangement of radial expansion rods, the staff can intuitively judge whether there is a possibility of damage by observing the position of the radial expansion rods, and can promptly remind the staff to carry out maintenance, thereby improving safety, and effectively avoiding the situation where the bellows can only be discovered after being damaged, thereby significantly reducing the safety hazards caused by leakage of transported gas or liquid.

Description

Technical Field

[0001] The invention relates to the field of bellows, and more particularly to a bidirectional telescopic and expandable early warning bellows. Background Art

[0002] Bellows refers to a tubular elastic sensitive element connected by foldable corrugated sheets along the folding and stretching direction. Bellows are widely used in instruments and meters. Their main purpose is to be used as measuring elements of pressure measuring instruments to convert pressure into displacement or force. The bellows has a thinner wall and higher sensitivity, with a measuring range of tens of Pa to tens of MPa. Its open end is fixed, the sealed end is in a free state, and an auxiliary spiral spring or reed is used to increase elasticity. When working, it stretches along the length of the tube under the action of internal pressure, causing the movable end to produce a displacement that is related to the pressure. The movable end drives the pointer to directly indicate the size of the pressure. Bellows are often combined with displacement sensors to form pressure sensors with output as electrical quantity, and are sometimes used as isolation elements. Since the extension of bellows requires a larger volume change, its response speed is lower than that of Bourdon tubes. Bellows are suitable for measuring low pressures.

[0003] Bellows mainly include metal bellows, bellows expansion joints, bellows heat exchange tubes, diaphragm boxes and metal hoses. Metal bellows are mainly used to compensate for pipeline thermal deformation, shock absorption, and absorb pipeline settlement deformation. They are widely used in petrochemical, instrumentation, aerospace, chemical, electric power, cement, metallurgy and other industries. Plastic and other materials of bellows play an irreplaceable role in media transportation, power threading, machine tools, home appliances and other fields.

[0004] Bellows: A pressure measuring elastic element in pressure measuring instruments. It is a cylindrical thin-walled corrugated shell with multiple transverse corrugations. The bellows is elastic and can produce displacement under the action of pressure, axial force, transverse force or bending moment. Bellows are widely used in instruments and meters. Their main purpose is to be used as a measuring element of pressure measuring instruments to convert pressure into displacement or force. The bellows have thin walls and high sensitivity, and the measuring range is from tens of Pa to tens of MPa. In addition, bellows can also be used as a sealing isolation element to separate two media or prevent harmful fluids from entering the measuring part of the equipment. It can also be used as a compensation element to compensate for the temperature error of the instrument by using its volume variability. Sometimes it is also used as an elastic connection joint between two parts. Bellows can be divided into metal bellows and non-metal bellows according to the constituent materials; they can be divided into single-layer and multi-layer according to the structure. Single-layer bellows are more widely used. Multi-layer bellows have high strength, good durability, and low stress, and are used in important measurements. The materials of bellows are generally bronze, brass, stainless steel, monel and inconel, etc.

[0005] The bellows has the following functions: First, the bellows can be used as an elastic element. Second, the bellows is used as a metal hose. Third, the bellows is used as the flexible section expansion joint of the expansion joint. The existing bellows mainly compensate for the thermal expansion of the pipe in overheating conditions by lateral deformation during use. However, the lateral deformation along the extension direction of the pipe is limited in compensation effect. In addition, in the case of overheating, the one-way deformation compensation is also prone to excessive deformation of the bellows, causing damage. At the same time, the damage inspection of the bellows in the prior art requires professional machines, or it can only be discovered and repaired after serious damage. When transporting some toxic gases or liquids, if the abnormality of the bellows is not discovered in time, there will be a great safety hazard after leakage. Summary of the invention

[0006] 1. Technical problems to be solved

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide a bidirectional telescopic and expandable early warning bellows. Through the setting of a thermal expansion bag, when the temperature is too high during transportation, the heat transfer block guides the heat into the thermal expansion bag, causing the air to expand due to the heat, thereby driving the thermal expansion bag to deform and expand, so that the bellows can deform in the lateral and radial directions at the same time. Compared with only the lateral deformation, the lateral deformation force of the thermal expansion is dispersed, thereby effectively protecting the bellows from damage due to excessive deformation in the lateral direction. At the same time, through the setting of the radial expansion rod, the staff can intuitively judge whether there is a possibility of damage by observing the position of the radial expansion rod, and can promptly remind the staff to carry out maintenance, thereby improving safety, and effectively avoiding the situation where the bellows can only be discovered after it is damaged, thereby significantly reducing the safety hazards caused by leakage of gas or liquid during transportation.

[0008] 2. Technical solution

[0009] To solve the above problems, the present invention adopts the following technical solutions.

[0010] A bidirectional telescopic and expandable early warning bellows, comprising two symmetrical external tube ends, one end of the two external tube ends close to each other is fixedly connected with a corrugated end, a plurality of depressions facing outwards of the corrugated end are sleeved with radial expansion rings, a radial expansion cavity is excavated inside the radial expansion ring, the radial expansion cavity comprises a ball groove and an elongated hole, the elongated hole is located directly above the ball groove, a radial expansion rod is placed through the elongated hole, one end of the radial expansion rod extends to the outside of the elongated hole and contacts with the orifice of the elongated hole, the other end of the radial expansion rod extends into the ball groove, a thermal expansion bag is wrapped and fixed at the lower end of the radial expansion ring, the thermal expansion bag contacts with the inner wall of the depression, the inner wall of the ball groove is provided with an air expansion platform, the air expansion platform is located directly below the radial expansion rod, a plurality of evenly distributed heat transfer blocks are fixedly connected to one end of the thermal expansion bag close to the radial expansion ring, A heat-uniform net is fixedly connected between the radial expansion ring and the thermal expansion bag, and the heat transfer block is in contact with the heat-uniform net. Through the arrangement of the thermal expansion bag, when the temperature is too high during transportation, the heat transfer block can guide the heat into the thermal expansion bag, so that the air expands due to the heat, thereby driving the thermal expansion bag to deform and expand, so that the corrugated end can deform laterally and radially at the same time. Compared with only lateral deformation, the lateral deformation force of thermal expansion is dispersed, thereby effectively protecting the corrugated end from being easily damaged due to excessive deformation in the lateral direction. At the same time, through the arrangement of the radial expansion rod, the staff can intuitively judge whether the corrugated end is likely to be damaged by observing the position of the radial expansion rod, and can promptly remind the staff to carry out maintenance, thereby improving safety, and effectively avoiding the situation where the bellows can only be discovered after being damaged, thereby significantly reducing the safety hazards caused by leakage of transported gas or liquid.

[0011] Furthermore, the cross-section of the radial expansion ring is a T-shaped structure, and the lower end of the T-shaped structure gradually becomes thicker from top to bottom, so that there can be a certain gap between the upper end of the continuously undulating part of the corrugated end and the outer surface of the radial expansion ring, thereby providing a certain deformation space for the corrugated end in the lateral direction. The left and right ends above the T-shaped structure are fixedly connected with magnets, and the magnets close to each other on the two adjacent radial expansion rings repel each other, so that when the corrugated end is deformed by thermal expansion and contraction, and the local deformation is uneven due to uneven heating, the radial expansion ring will cause a certain repulsive effect on its adjacent radial expansion ring when it tilts to the left or right, so that it can deform along its deformation direction, effectively ensuring the consistency of the overall expansion direction, and then effectively maintaining its stability during use, and it is not easy to be damaged due to local aging caused by uneven deformation.

[0012] Furthermore, the thermal expansion bladder is made of elastic material, and the outer surface of the thermal expansion bladder is coated with a LINE-X coating, so that when heated, the heat transfer block in the thermal expansion bladder guides the heat into the thermal expansion bladder, causing the thermal expansion bladder to deform radially downward when the air in the thermal expansion bladder expands due to heat, thereby pushing the radial expansion ring outward, and then the corrugated end can deform in the lateral and radial directions at the same time when it expands due to heat. Compared with only lateral deformation, the lateral deformation force of thermal expansion is dispersed, thereby effectively protecting the corrugated end from being damaged due to excessive deformation in the lateral direction.

[0013] Furthermore, the heat transfer block includes a heat transfer hemisphere, a main heat wire is fixed through the middle of the heat transfer hemisphere, the main heat wire extends to the outside of the heat transfer hemisphere and contacts with the heat uniforming net, and the outer surface of the heat transfer hemisphere is also inlaid with a plurality of evenly distributed branch heat conductive wires, through which heat can be directly conducted to the heat uniforming net, so that under the action of the heat uniforming net, heat is evenly conducted to the space between the thermal expansion bag and the radial expansion ring, so that the internal air is heated and expanded, and the thermal expansion bag is inflated to achieve radial deformation, and the heat absorbed by the heat transfer hemisphere can be directly conducted to the air in the thermal expansion bag through the branch heat conductive wires, thereby increasing the area of ​​heat radiation outward, so that the air is heated and expanded faster, and the radial expansion deformation is faster, so that the effect of reducing the degree of lateral deformation is better.

[0014] Furthermore, the length of the branch heat conductive wire outside the heat transfer hemisphere is 4-6 times the length of the branch heat conductive wire embedded in the heat transfer hemisphere, so that the portion of the branch heat conductive wire exposed to the air is longer, thereby making the air near the branch heat conductive wire heated faster.

[0015] Furthermore, the heat transfer hemisphere and the branch heat conductive wire are both made of hard heat conductive material, so that the two are not easily deformed during the heat transfer process, thereby effectively ensuring the normal heat conduction function of the two. The heat uniformizing net is made of soft elastic heat conductive material, so that at normal temperature, when no length compensation is required, the heat uniformizing net can be in a limp state, so that the thermal expansion bag and the radial expansion ring are as close together as possible, which is convenient for the thermal expansion bag to expand in volume when heated.

[0016] Furthermore, the air expansion platform includes a plurality of air heating struts evenly fixed on the inner wall of the ball groove and an air floating plate connected to the upper end of the air heating struts, the air heating struts are communicated with the space between the heat expansion bag and the radial expansion ring, and the air heating struts are made of a hollow elastic material, so that after being heated, the air between the heat expansion bag and the radial expansion ring expands and enters the air heating struts and fills them, making them hard from soft, so that the air floating plate is supported by the air heating struts and rises, and then squeezes the radial expansion rods upward to make them move outward of the radial expansion ring, so that the staff can intuitively understand the radial expansion of the bellows from the outside, the higher the temperature, the greater the expansion degree, the longer the part of the radial expansion rod extending outward, and then when the temperature rises abnormally, when it is observed that the extended part of the radial expansion rod is too long, it means that the corrugated end has a tendency to be damaged, so the staff can be reminded to repair in time, improve safety, and effectively avoid the situation that the bellows can only be discovered after being damaged, thereby significantly reducing the safety hazards caused by leakage of transported gas or liquid.

[0017] Furthermore, the radial expansion rod includes an outer rod penetrating the elongated hole, and a limiting lightweight ball and a force-bearing block respectively fixedly connected to the upper and lower ends of the outer rod.

[0018] Furthermore, the limiting lightweight ball is a lightweight hollow structure, which makes its overall mass lighter and never causes a burden on the rising position of the inflation platform, thereby making the radial expansion rod more intuitive in reflecting the degree of radial expansion of the corrugated end, which is convenient for staff to observe. The extension rod is made of non-elastic material, which makes it difficult to deform left and right, thereby better reflecting the expansion degree of the bellows.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) Through the provision of the thermal expansion bag, this solution can achieve that when the temperature is too high during transportation, the heat transfer block guides the heat into the thermal expansion bag, causing the air to expand due to the heat, thereby driving the thermal expansion bag to deform and expand, so that the bellows can deform in both the lateral and radial directions at the same time. Compared with only lateral deformation, the lateral deformation force of thermal expansion is dispersed, thereby effectively protecting the corrugated end from being damaged in the lateral direction due to excessive deformation. At the same time, through the provision of the radial expansion rod, the staff can intuitively judge whether there is a possibility of damage by observing the position of the radial expansion rod, and can promptly remind the staff to carry out maintenance, thereby improving safety and effectively avoiding the situation where the bellows can only be discovered after being damaged, thereby significantly reducing the safety hazards caused by leakage of gas or liquid during transportation.

[0022] (2) The cross-section of the radial expansion ring is a T-shaped structure, and the lower end of the T-shaped structure gradually becomes thicker from top to bottom, so that there can be a certain gap between the upper end of the continuously undulating part and the outer surface of the radial expansion ring, thereby providing a certain deformation space for the corrugated end in the lateral direction. The left and right ends of the upper part of the T-shaped structure are fixedly connected with magnets, and the magnets close to each other on the two adjacent radial expansion rings repel each other, so that when the corrugated end is deformed by thermal expansion and contraction, when the local deformation is uneven due to uneven heating, the radial expansion ring will cause a certain repulsive effect on its adjacent radial expansion ring when it tilts to the left or right to a certain extent, so that it can deform along its deformation direction, effectively ensuring the consistency of the overall expansion direction, and then effectively maintaining its stability during use, and it is not easy to be damaged by local aging due to uneven deformation.

[0023] (3) The thermal expansion bladder is made of elastic material, and the outer surface of the thermal expansion bladder is coated with LINE-X coating, so that when heated, the heat transfer block in the thermal expansion bladder guides the heat into the thermal expansion bladder, causing the thermal expansion bladder to deform radially downward when the air in the thermal expansion bladder expands due to heat, thereby pushing the radial expansion ring outward, and then the corrugated end can deform in the lateral and radial directions at the same time when it expands due to heat. Compared with only lateral deformation, the lateral deformation force of thermal expansion is dispersed, thereby effectively protecting the corrugated end from being damaged due to excessive lateral deformation.

[0024] (4) The heat transfer block includes a heat transfer hemisphere, a main heat wire is fixedly passed through the middle of the heat transfer hemisphere, the main heat wire extends to the outside of the heat transfer hemisphere and contacts with the heat uniformity net, and the outer surface of the heat transfer hemisphere is also inlaid with a plurality of evenly distributed branch heat wires, through which heat can be directly transferred to the heat uniformity net, so that under the action of the heat uniformity net, heat is evenly transferred to the space between the thermal expansion bag and the radial expansion ring, so that the internal air is heated and expanded, and the thermal expansion bag is inflated to achieve radial deformation, and the heat absorbed by the heat transfer hemisphere can be directly transferred to the air in the thermal expansion bag through the branch heat wires, so as to increase the area of ​​heat radiation outward, so that the air is heated and expanded faster, and the radial expansion deformation is faster, so that the effect of reducing the degree of lateral deformation is better.

[0025] (5) The length of the branch heat conductive wire outside the heat transfer hemisphere is 4-6 times the length of the branch heat conductive wire embedded in the heat transfer hemisphere, so that the portion of the branch heat conductive wire exposed to the air is longer, thereby causing the air near the branch heat conductive wire to heat faster.

[0026] (6) The heat transfer hemisphere and the branch heat conductive wire are both made of hard heat conductive material, so that they are not easily deformed during the heat transfer process, thereby effectively ensuring their normal heat conduction function. The heat uniformity net is made of soft elastic heat conductive material, so that at normal temperature, when no length compensation is required, the heat uniformity net can be in a limp state, so that the thermal expansion bag and the radial expansion ring are as close together as possible, which is convenient for the thermal expansion bag to expand in volume when heated.

[0027] (7) The air expansion table includes a plurality of air-heating struts evenly fixed on the inner wall of the ball groove and an air flotation plate connected to the upper end of the air-heating struts. The air-heating struts are connected to the space between the heat expansion bag and the radial expansion ring, and the air-heating struts are made of a hollow elastic material, so that after being heated, the air between the heat expansion bag and the radial expansion ring expands and enters the air-heating struts and fills them, making them hard from soft, so that the air flotation plate is supported by the air-heating struts and rises, and then squeezes the radial expansion rod upward to move outward of the radial expansion ring, so that the staff can intuitively understand the radial expansion of the bellows from the outside. The higher the temperature, the greater the expansion degree, and the longer the part of the radial expansion rod extending outward. When the temperature rises abnormally, when the extended part of the radial expansion rod is observed to be too long, it indicates that there is a tendency to be damaged, which can promptly remind the staff to carry out maintenance, improve safety, and effectively avoid the situation where the bellows can only be discovered after being damaged, thereby significantly reducing the safety hazards caused by leakage of transported gas or liquid.

[0028] (8) The radial expansion rod includes an outer rod passing through the elongated hole and a limiting lightweight ball and a force-bearing block respectively fixedly connected to the upper and lower ends of the outer rod.

[0029] (9) The limit lightweight ball is a lightweight hollow structure, which makes its overall mass lighter and never causes a burden on the rise of the air expansion table, thereby making the radial expansion rod more intuitive for the degree of radial expansion, which is convenient for staff to observe. The outer rod is made of non-elastic material, which makes it difficult to deform left and right, thereby better reflecting the expansion degree of the bellows. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the front side of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the corrugated pipe of the present invention when lateral deformation occurs;

[0032] Figure 3 It is a schematic structural diagram of the radial expansion ring of the present invention;

[0033] Figure 4 for Figure 3 The structural diagram at A in the middle;

[0034] Figure 5 It is a schematic structural diagram of the heat transfer block of the present invention;

[0035] Figure 6 It is a schematic structural diagram of the radial expansion ring of the present invention when radial expansion occurs.

[0036] Description of the numbers in the figure:

[0037] 1 external tube end, 2 corrugated end, 3 radial expansion ring, 41 slender hole, 42 ball groove, 5 extension rod, 6 limit lightweight ball, 7 force block, 8 magnet, 9 thermal expansion bag, 10 uniform heat network, 11 heat transfer hemisphere, 12 main heating wire, 13 branch heat conductive wire, 14 air heating support rod, 15 air floating plate. DETAILED DESCRIPTION

[0038] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Embodiment 1:

[0042] See also Figure 1, a bidirectional telescopic early warning bellows, comprising two symmetrical external pipe ends 1, one end of the two external pipe ends 1 close to each other is fixedly connected with a corrugated end 2, and multiple recesses of the corrugated end 2 facing outward are sleeved with radial expansion rings 3, the cross section of the radial expansion ring 3 is a T-shaped structure, and the lower end of the T-shaped structure is gradually thickened from top to bottom, please refer to Figure 2 , so that there can be a certain gap between the upper end of the continuously undulating part of the corrugated end 2 and the outer surface of the radial expansion ring 3, thereby providing a certain deformation space for the corrugated end 2 in the lateral direction, and the left and right ends of the upper side of the T-shaped structure are fixedly connected with magnets 8, and the magnets 8 close to each other on the two adjacent radial expansion rings 3 repel each other, so that when the corrugated end 2 is deformed by thermal expansion and contraction, when the local deformation is uneven due to uneven heating, the radial expansion ring 3 will cause a certain repulsive effect on its adjacent radial expansion ring 3 when it tilts to the left or right, so that it can deform along its deformation direction, effectively ensuring the consistency of the overall expansion direction, and then effectively maintaining its stability during use, and it is not easy to be damaged due to local aging caused by uneven deformation.

[0043] See also Figure 3 A radial expansion cavity is excavated inside the radial expansion ring 3, and the radial expansion cavity includes a ball groove 42 and an elongated hole 41. The elongated hole 41 is located directly above the ball groove 42, and a radial expansion rod is placed inside the elongated hole 41. One end of the radial expansion rod extends to the outside of the elongated hole 41 and contacts with the orifice of the elongated hole 41, and the other end of the radial expansion rod extends into the ball groove 42. The radial expansion rod includes an extension rod 5 that passes through the elongated hole 41 and a limiting lightweight ball 6 and a force block 7 that are respectively fixedly connected to the upper and lower ends of the extension rod 5. The limiting lightweight ball 6 is a lightweight hollow structure, so that its overall mass is relatively light, and it is never easy to cause a burden on the rise of the position of the inflation table, thereby making the radial expansion rod more intuitive for the degree of radial expansion of the corrugated end 2, which is convenient for staff to observe. The extension rod 5 is made of non-elastic material, so that it is not easy to deform left and right, thereby better reflecting the expansion degree of the present bellows.

[0044] See also Figure 3-4The lower end of the radial expansion ring 3 is wrapped and fixed with a heat expansion bag 9, and the heat expansion bag 9 contacts the inner wall of the depression of the corrugated end 2. The inner wall of the ball groove 42 is provided with an air expansion platform, and the air expansion platform is located directly below the radial expansion rod. The air expansion platform includes a plurality of air heat struts 14 evenly fixed on the inner wall of the ball groove 42 and an air floating plate 15 connected to the upper end of the air heat strut 14. The air heat strut 14 is connected to the space between the heat expansion bag 9 and the radial expansion ring 3, and the air heat strut 14 is made of a hollow elastic material, so that after being heated, the air between the heat expansion bag 9 and the radial expansion ring 3 will expand and enter the air heat strut 14 and fill 4, so that 4 changes from soft to hard, thereby making the air The floating plate 15 is supported by the gas-heating strut 14 and rises, and then presses the radial expansion rod upward to make it move outward of the radial expansion ring 3, so that the staff can intuitively understand the radial expansion of the bellows from the outside. The higher the temperature, the greater the expansion degree, and the longer the part of the radial expansion rod extending outward. When the temperature rises abnormally, when the extended part of the radial expansion rod is observed to be too long, it means that the corrugated end 2 has a tendency to be damaged, which can remind the staff to perform maintenance in time, improve safety, and effectively avoid the situation that the bellows can only be discovered after it is damaged, thereby significantly reducing the safety hazards caused by leakage of gas or liquid during transportation;

[0045] A plurality of evenly distributed heat transfer blocks are fixedly connected to one end of the thermal expansion sac 9 close to the radial expansion ring 3, a uniform heat network 10 is fixedly connected between the radial expansion ring 3 and the thermal expansion sac 9, the heat transfer blocks are in contact with the uniform heat network 10, the thermal expansion sac 9 is made of elastic material, and the outer surface of the thermal expansion sac 9 is coated with a LINE-X coating, so that when heated, the heat transfer blocks in the thermal expansion sac 9 guide the heat into the thermal expansion sac 9, causing the thermal expansion sac 9 to deform radially downward when the air in the thermal expansion sac 9 expands due to heat, thereby pushing the radial expansion ring 3 outward, and then causing the corrugated end 2 to deform both laterally and radially when it expands due to heat. Compared with only lateral deformation, the lateral deformation force of thermal expansion is dispersed, thereby effectively protecting the corrugated end 2 from being damaged due to excessive lateral deformation.

[0046] See also Figure 5The heat transfer block includes a heat transfer hemisphere 11, a main heat wire 12 is fixedly passed through the middle of the heat transfer hemisphere 11, the main heat wire 12 extends to the outside of the heat transfer hemisphere 11 and contacts with the heat uniforming net 10, and a plurality of evenly distributed branch heat conductive wires 13 are inlaid on the outer surface of the heat transfer hemisphere 11. The heat can be directly conducted to the heat uniforming net 10 through the main heat conductive wire 12, so that under the action of the heat uniforming net 10, the heat is evenly conducted to the space between the thermal expansion bag 9 and the radial expansion ring 3, so that the internal air is heated and expanded, and the thermal expansion bag 9 is inflated to achieve radial deformation. The heat absorbed by the heat transfer hemisphere 11 can be directly conducted to the air in the thermal expansion bag 9 through the branch heat conductive wire 13, so as to increase the area of ​​heat radiation outward, so as to make the air heat and expand faster, and make the radial expansion deformation faster, so as to achieve better effect in reducing the degree of lateral deformation.

[0047] The length of the branch heat conductive wire 13 outside the heat transfer hemisphere 11 is 4-6 times the length of the branch heat conductive wire 13 embedded in the heat transfer hemisphere 11, so that the part of the branch heat conductive wire 13 exposed to the air is longer, so that the air near the branch heat conductive wire 13 is heated faster. The heat transfer hemisphere 11 and the branch heat conductive wire 13 are both made of hard heat conductive material, so that they are not easy to deform during the heat transfer process, thereby effectively ensuring the normal heat conduction of the two. The heat uniformity net 10 is made of soft elastic heat conductive material, so that at normal temperature, when no length compensation is required, the heat uniformity net 10 can be in a limp state, so that the thermal expansion bag 9 and the radial expansion ring 3 are as close together as possible, which is convenient for the thermal expansion bag 9 to expand in volume when heated.

[0048] By setting the thermal expansion bag 9, when the temperature is too high during transportation, the heat transfer block can guide the heat into the thermal expansion bag 9, so that the air expands due to the heat, thereby driving the thermal expansion bag 9 to deform and expand, so that the corrugated pipe can deform in the lateral and radial directions at the same time. Compared with the lateral deformation only, the lateral deformation force of the thermal expansion is dispersed, thereby effectively protecting the corrugated end 2 from being easily damaged due to excessive deformation in the lateral direction. At the same time, through the setting of the radial expansion rod, the staff can intuitively judge whether the corrugated end 2 is likely to be damaged by observing the position of the radial expansion rod, and can promptly remind the staff to carry out maintenance, thereby improving safety, and effectively avoiding the situation where the corrugated pipe can only be discovered after it is damaged, thereby significantly reducing the safety hazards caused by leakage of gas or liquid during transportation.

[0049] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A bidirectional telescopic and expandable early warning bellows, comprising two symmetrical external pipe ends (1), wherein one end of the two external pipe ends (1) close to each other is fixedly connected to a corrugated end (2), characterized in that: A radial expansion ring (3) is sleeved on a plurality of recessed portions of the corrugated end (2) facing outwards. A radial expansion cavity is formed inside the radial expansion ring (3). The radial expansion cavity includes a ball groove (42) and an elongated hole (41). The elongated hole (41) is located directly above the ball groove (42). A radial expansion rod is placed through the elongated hole (41). One end of the radial expansion rod extends outside the elongated hole (41) and contacts the opening of the elongated hole (41). The other end of the radial expansion rod extends to the ball groove (42). ), the lower end of the radial expansion ring (3) is wrapped and fixed with a heat expansion bag (9), the heat expansion bag (9) is in contact with the inner wall of the recess of the corrugated end (2), the inner wall of the ball groove (42) is provided with an air expansion platform, the air expansion platform is located directly below the radial expansion rod, the end of the heat expansion bag (9) close to the radial expansion ring (3) is fixedly connected with a plurality of evenly distributed heat transfer blocks, a uniform heat network (10) is fixedly connected between the radial expansion ring (3) and the heat expansion bag (9), and the heat transfer block is in contact with the uniform heat network (10), The thermal expansion bag (9) is made of elastic material, and the outer surface of the thermal expansion bag (9) is coated with a LINE-X coating. The heat transfer block comprises a heat transfer hemisphere (11), a main heat conducting wire (12) is fixedly passed through the middle of the heat transfer hemisphere (11), the main heat conducting wire (12) extends to the outside of the heat transfer hemisphere (11) and contacts the heat uniforming net (10), and a plurality of evenly distributed branch heat conducting wires (13) are also inlaid on the outer surface of the heat transfer hemisphere (11).

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