Bent protection heat type flue gas sampling pipe

Abstract

The utility model discloses a kind of heat tracing flue gas sampling pipes of bending protection, it includes tensile component and filling layer, the inside fixed connection of filling layer has heat tracing tape, first sampling pipe and second sampling pipe, the tensile component includes elastic rod, the second connecting block is equipped with clamping groove, the clamping block is movably contained in clamping groove, the inside fixed connection of clamping groove has spring, by above-mentioned structure, by elastic rod built-in clamping block, clamping groove and spring, tensile groove deformation buffering stress when bending, spring drive assembly accurate reset after external force elimination, prevent plastic deformation, simultaneously, elastic rod surface ball and filling layer positioning groove tightly embedded form mechanical interlock, ensure that component and filling layer firmly connect, synchronous deformation, avoid the damage, looseness or performance decline caused by internal component due to relative displacement, to guarantee the structural integrity and measurement accuracy after repeated bending.

Description

Technical Field

[0001] This utility model relates to the field of flue gas sampling tube technology, and in particular to a heat-tracing flue gas sampling tube with bend protection. Background Technology

[0002] Heated flue gas sampling tubes are key components of continuous emission monitoring systems for industrial flue gas, widely used in flue gas composition analysis in industries such as power, metallurgy, and chemicals. Their main function is to extract high-temperature, high-humidity flue gas, which may contain corrosive components, from flue ducts or pipelines and transport it to analytical instruments. To ensure that the flue gas does not condense during transport (which would lead to component loss, pipeline corrosion, and measurement distortion), the sampling tube typically integrates a heating cable for continuous heating and insulation.

[0003] However, during repeated bending, key components such as the internal heating tape and sampling tube of traditional heat-traced flue gas sampling tubes are prone to plastic deformation due to stress concentration, or loosening and damage due to relative displacement between components. This leads to a decline in the performance of the sampling tube, affects the accuracy of flue gas composition measurement, and shortens the service life of the equipment. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a heat-traced flue gas sampling tube with bending protection, which solves the problem that the internal components (heat tracing cable and sampling tube) undergo irreversible plastic deformation due to stress concentration when repeatedly bent.

[0005] This utility model also provides a heat-traced flue gas sampling tube with the aforementioned bend protection, comprising: a tensile component and a filling layer, wherein a heat tracing tube, a first sampling tube, and a second sampling tube are fixedly connected inside the filling layer; the tensile component includes an elastic rod, the elastic rod having an axially formed tension groove, a first connecting block and a second connecting block being fixedly connected to both sides of the tension groove respectively, a locking block being fixedly connected to the top of the first connecting block, and a locking groove being formed in the second connecting block, wherein the locking block is movably accommodated in the locking groove, a spring being fixedly connected inside the locking groove, and the other end of the spring being fixedly connected to the locking block; the dual sampling tube design allows for simultaneous or alternating sampling, improving efficiency and reliability, or can be used for sampling different components.

[0006] According to the present invention, a heat-tracing flue gas sampling tube with bending protection is provided, wherein the heat tracing cable is wrapped with an insulating layer to prevent short circuits, electric shock risks, or signal interference caused by leakage of the heat tracing cable.

[0007] According to the present invention, a heat-tracing flue gas sampling pipe with bending protection is provided, wherein a retaining ball is fixedly connected to the outer surface of the elastic rod, and a positioning groove adapted to the retaining ball is provided on the contact surface between the filling layer and the tensile component. The retaining ball is embedded in the positioning groove to ensure that the tensile component will not undergo relative displacement or torsion within the filling layer when the pipe is bent or subjected to complex external forces.

[0008] According to the present invention, a heat-tracing flue gas sampling tube with bending protection is provided, wherein the filling layer is wrapped with a sealing layer, and the sealing layer is wrapped with a protective layer to protect the internal structure from corrosion and pollution.

[0009] According to the present invention, a heat-tracing flue gas sampling pipe with bending protection has two heat tracing cables fixedly connected inside the filling layer, and the heat tracing cables are symmetrically arranged on both sides of the tensile component. Heat is applied from both sides simultaneously, which effectively reduces the temperature gradient on the pipe cross section and avoids condensation caused by local supercooling points.

[0010] According to the present invention, a heat-tracing flue gas sampling tube with bending protection is provided, wherein the elastic rod is located at the center of the filling layer and the elastic rod is cylindrical.

[0011] Beneficial effects:

[0012] This technical solution utilizes a bend-protected heated flue gas sampling tube. By incorporating a tensile-resistant component, the reliability and service life of the heated flue gas sampling tube under bending conditions are improved. The core elastic rod of the tensile-resistant component, along with its built-in locking blocks, slots, and spring structure, effectively buffers stress through the deformation of the tensile groove when bent by external force. After the external force is removed, the elastic restoring force of the spring drives the component to accurately return to its initial shape, preventing plastic deformation. Simultaneously, the locking balls evenly distributed on the surface of the elastic rod tightly engage with the positioning grooves within the filling layer to form a mechanical interlock. This ensures that the tensile-resistant component and the filling layer maintain a firm connection and synchronous deformation during bending, preventing damage, loosening, or performance degradation of internal components such as the heating tape, the first sampling tube, and the second sampling tube due to relative displacement. This ensures the structural integrity and measurement accuracy of the sampling tube after repeated bending under complex working conditions. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0014] Figure 1 This is a structural diagram of the entire utility model;

[0015] Figure 2 This is a structural diagram of the tensile component of this utility model;

[0016] Figure 3 This is a structural diagram showing the connection relationship between the card block and the card slot of this utility model.

[0017] Legend:

[0018] 1. Tensile component; 2. Filler layer; 3. Heating tape; 4. Insulation layer; 5. First sampling tube; 6. Second sampling tube; 7. Sealing layer; 8. Protective layer;

[0019] 101. Elastic rod; 102. Tension groove; 103. First connecting block; 104. Second connecting block; 105. Ball catcher;

[0020] 1031, locking block; 1041, spring; 1042, locking slot. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-3 This utility model provides a heat-tracing flue gas sampling tube with bend protection, comprising: a tensile component 1 and a filling layer 2. The filling layer 2 is internally fixedly connected to a heat tracing cable 3, a first sampling tube 5, and a second sampling tube 6. The heat tracing cable 3 is wrapped with an insulating layer 4. The filling layer 2 is externally wrapped with a sealing layer 7. The sealing layer 7 is externally wrapped with a protective layer 8. The filling layer 2 is internally fixedly connected to two heat tracing cables 3, which are symmetrically arranged on both sides of the tensile component 1.

[0023] Specifically, the filling layer 2 is made of glass fiber material, which provides excellent thermal insulation (reducing heat loss) and high structural strength (supporting internal components against pressure and deformation). The sealing layer 7 is made of nitrile rubber, whose oil resistance and airtightness effectively isolate external corrosive media (such as acidic flue gas and water vapor). The protective layer 8 is made of stainless steel wire mesh, which provides extremely high wear resistance and impact resistance, preventing internal structural failure caused by mechanical damage. The symmetrical distribution of the double heat tracing cables 3 ensures that the first sampling tube 5 and the second sampling tube 6 are heated evenly throughout the process, avoiding flue gas condensation. The insulation layer 4 prevents short circuits, electric shock risks, or signal interference caused by leakage of the heat tracing cables 3.

[0024] The tensile component 1 includes an elastic rod 101. The elastic rod 101 has a tension groove 102 axially. A first connecting block 103 and a second connecting block 104 are fixedly connected to both sides of the tension groove 102, respectively. A locking block 1031 is fixedly connected to the top of the first connecting block 103. The second connecting block 104 has a locking groove 1042. The locking block 1031 is movably accommodated in the locking groove 1042. A spring 1041 is fixedly connected inside the locking groove 1042, and the other end of the spring 1041 is fixedly connected to the locking block 1031. A locking ball 105 is fixedly connected to the outer surface of the elastic rod 101. A positioning groove adapted to the locking ball 105 is opened on the contact surface between the filling layer 2 and the tensile component 1. The locking ball 105 is embedded in the positioning groove. The elastic rod 101 is located at the center of the filling layer 2 and is cylindrical.

[0025] Specifically, the locking block 1031 can extend and retract along the locking groove 1042, and the spring 1041 provides elastic restoring force. Multiple stainless steel locking balls 105 are uniformly welded to the outer surface of the elastic rod 101. A hemispherical positioning groove matching the size of the locking ball 105 is opened on the inner surface of the filling layer 2. The elastic rod 101 is placed in the center of the filling layer 2, so that the locking ball 105 is embedded in the uncured filling material. After curing, a mechanical interlocking structure is formed to ensure that the tensile component 1 has no displacement in the filling layer 2.

[0026] Working principle: During use, when the first sampling tube 5 and the second sampling tube 6 are bent by external force, the tensile groove 102 of the elastic rod 101 deforms and widens, driving the locking block 1031 of the first connecting block 103 to slide in the locking groove 1042 of the second connecting block 104, compressing the spring 1041 to store energy. After the external force is eliminated, the spring 1041 releases energy to push the locking block 1031 to reset, causing the elastic rod 101 to return to its initial shape. Throughout the process, the locking ball 105 and the positioning groove of the filling layer 2 are mechanically interlocked to ensure that the tensile component 1 and the filling layer 2 deform synchronously, preventing the internal components from shifting. The double heating tape 3 symmetrically supports the first sampling tube 5 and the second sampling tube 6. The glass fiber filling layer 2 maintains temperature uniformity. The nitrile rubber sealing layer 7 blocks external corrosive media. The stainless steel protective layer 8 resists mechanical impact, realizing the integration of three functions: bending stress buffering, heat tracing and anti-condensation, and sealing protection.

[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A heat-tracing flue gas sampling tube with bend protection, characterized in that, include: The tensile component (1) and the filling layer (2) are fixedly connected to the inside of the filling layer (2), which includes a heat tracing tube (3), a first sampling tube (5), and a second sampling tube (6). The tensile component (1) includes an elastic rod (101), the elastic rod (101) has an axially formed tension groove (102), a first connecting block (103) and a second connecting block (104) are fixedly connected to both sides of the tension groove (102), a locking block (1031) is fixedly connected to the top of the first connecting block (103), and a locking groove (1042) is formed in the second connecting block (104). The locking block (1031) is movably accommodated in the locking groove (1042), and a spring (1041) is fixedly connected inside the locking groove (1042), and the other end of the spring (1041) is fixedly connected to the locking block (1031).

2. The heat-tracing flue gas sampling tube with bending protection according to claim 1, characterized in that, The heat tracing cable (3) is wrapped with an insulating layer (4).

3. The heat-tracing flue gas sampling tube with bending protection according to claim 1, characterized in that, A retaining ball (105) is fixedly connected to the outer surface of the elastic rod (101). A positioning groove adapted to the retaining ball (105) is opened on the contact surface between the filling layer (2) and the tensile component (1). The retaining ball (105) is embedded in the positioning groove.

4. A heat-tracing flue gas sampling tube with bend protection according to claim 2, characterized in that, The filling layer (2) is wrapped with a sealing layer (7), and the sealing layer (7) is wrapped with a protective layer (8).

5. A heat-tracing flue gas sampling tube with bending protection according to claim 2, characterized in that, The filling layer (2) has two fixed connections inside, and the heat tracing cables (3) are symmetrically arranged on both sides of the tensile component (1).

6. A heat-tracing flue gas sampling tube with bend protection according to claim 1, characterized in that, The elastic rod (101) is located at the center of the filling layer (2), and the elastic rod (101) is cylindrical.

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