A steam heating conduit

Abstract

The application discloses a steam heating pipeline, which comprises a heating pipeline body, a polyurethane pipe and at least two air bags; the polyurethane pipe is sleeved on the heating pipeline body; a containing space is formed between the polyurethane pipe and the heating pipeline body, and the at least two air bags are sequentially and spacedly arranged in the containing space along the circumference of the heating pipeline body; the air bags are connected with an external air source; when the air bags are inflated, the air bags hold the polyurethane pipe to compress the polyurethane pipe. In the application, the air bags are arranged between the heating pipeline body and the polyurethane pipe; when the heating temperature of the heating pipeline body is too high, the external air source can be opened to inflate the air bags, the air bags are expanded to hold the polyurethane pipe, the polyurethane pipe is compressed from inside to outside, the contact area between the polyurethane pipe and the heating pipeline body is reduced, and the damage rate of the polyurethane pipe is reduced.

Description

Technical Field

[0001] This application relates to the field of heating pipeline technology, and more particularly to a steam heating pipeline. Background Technology

[0002] To reduce heat loss during the heating process and save energy, heating pipelines are generally required to be insulated. A common existing insulation method involves covering the welded heating pipeline with a polyurethane pipe. However, because the polyurethane pipe is in direct contact with the heating pipeline, excessively high pipeline temperatures can cause the polyurethane foam to carbonize, potentially leading to spontaneous combustion.

[0003] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a steam heating pipe that reduces the damage rate of polyurethane pipes, in order to address the above-mentioned deficiencies of the prior art.

[0005] The technical solution adopted by this application to solve the technical problem is as follows:

[0006] A steam heating pipeline includes a heating pipeline body and a polyurethane pipe, wherein the polyurethane pipe is sleeved on the heating pipeline body, and further includes:

[0007] At least two airbags;

[0008] There is a receiving space between the polyurethane pipe and the heating pipe body, and at least two airbags are located in the receiving space and are distributed sequentially at intervals along the circumference of the heating pipe body; the airbags are connected to an external air source; when the airbags are inflated, the airbags support the polyurethane pipe to compress the polyurethane pipe.

[0009] The steam heating pipeline further includes:

[0010] An airtight device is fitted onto the heating pipe body and is used to seal the receiving space at both ends along the axial direction of the polyurethane pipe, so that the receiving space forms a sealed space.

[0011] The airtight device is provided with air holes, which are connected to the airbag and an external air source respectively; the airbag is provided with multiple through holes, each of which is connected to the sealed space.

[0012] The steam heating pipeline, wherein the airtight device includes:

[0013] Two airtight sections are fitted onto the heating pipe body and are located on both sides of the axial direction of the polyurethane pipe, respectively.

[0014] Both airtight sections are in contact with the heating pipe body and the polyurethane pipe, respectively; at least one airtight section is provided with an air hole, and the air hole corresponds one-to-one with the airbag.

[0015] The steam heating pipe, wherein the airtight section includes:

[0016] airtight ring;

[0017] An airtight structure is provided on the airtight ring;

[0018] The airtight ring has a through hole structure that runs radially through it. The airtight structure is arranged inside the through hole structure and can move radially along the airtight ring to be close to / away from the heating pipe body. The projection of the airtight structure toward the circumferential surface of the heating pipe body completely covers the circumferential surface of the heating pipe body.

[0019] The steam heating pipeline includes an airtight structure comprising multiple airtight moving units and a through-hole structure comprising multiple through-hole units. The airtight moving units correspond one-to-one with the through-hole units and can move radially within the through-hole units along the airtight ring.

[0020] The steam heating pipeline has multiple airtight moving units arranged sequentially along the circumference of the airtight ring; multiple through-hole units connected sequentially; when the airtight moving unit is in close contact with the heating pipeline body, two adjacent airtight moving units come into contact.

[0021] The steam heating pipeline includes at least two groups of multiple airtight moving units arranged along the axial direction of the airtight ring; in each group, the airtight moving units are arranged sequentially at intervals along the circumference of the airtight ring; the circumference of the multiple airtight moving units projected onto the circumferential surface of the heating pipeline body is greater than the circumference of the heating pipeline body; adjacent groups of airtight moving units are staggered; any one airtight moving unit in one group is in contact with two adjacent airtight moving units in the other group.

[0022] The steam heating pipeline, wherein the airtight moving unit includes:

[0023] An arc-shaped elastic block is arranged with its inner arc surface facing the heating pipe body;

[0024] The screw is disposed on the outer arc surface of the arc-shaped elastic block and extends radially along the airtight ring.

[0025] The steam heating pipe, wherein the through-hole unit includes:

[0026] An arc-shaped mounting groove is recessed radially outward from the inner surface of the airtight ring;

[0027] A threaded hole extends radially inward from the outer circumferential surface of the airtight ring and communicates with the arc-shaped mounting groove.

[0028] The arc-shaped elastic block is located in the arc-shaped mounting groove and can reciprocate radially along the airtight ring; the screw is threadedly engaged with the threaded hole.

[0029] The steam heating pipe, wherein the air bladder has an elliptical cross-section along the radial direction of the heating pipe body.

[0030] Beneficial effects: In this application, by adding an airbag between the heating pipe body and the polyurethane pipe, when the heating temperature of the heating pipe body is too high, an external air source can be turned on to inflate the airbag. The inflated airbag supports the polyurethane pipe, causing the polyurethane pipe to be compressed from the inside out, thereby reducing the contact area between the polyurethane pipe and the heating pipe body, and thus reducing the damage rate of the polyurethane pipe. Attached Figure Description

[0031] Figure 1 This is a first view of the steam heating pipeline described in this application;

[0032] Figure 2 This is a second view of the steam heating pipe described in this application;

[0033] Figure 3 This is a schematic diagram of the radial cross-section of the steam heating pipeline described in this application;

[0034] Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle;

[0035] Figure 5 This is a schematic diagram of the structure of the airbag described in this application;

[0036] Figure 6 This is a schematic diagram of the airtight section in Embodiment 1 of this application;

[0037] Figure 7 This is a schematic diagram of the radial cross-section of the airtight ring in Embodiment 2 of this application;

[0038] Figure 8 This is a schematic diagram of the assembly of the first group of airtight moving units and the first group of through-hole units in Embodiment 2 of this application;

[0039] Figure 9 This is a schematic diagram of the assembly of the second group of airtight moving units and the second group of through-hole units in Embodiment 2 of this application;

[0040] Figure 10 This is an axial view of the steam heating pipeline described in Embodiment 2 of this application;

[0041] Figure 11 This is a schematic diagram showing the distribution of the first group of arc-shaped elastic blocks and the second group of arc-shaped elastic blocks along the axial direction in Embodiment 2 of this application;

[0042] Figure 12 This is a schematic diagram showing the radial distribution of the first group of arc-shaped elastic blocks and the second group of arc-shaped elastic blocks in Embodiment 2 of this application;

[0043] Figure 13 This is a functional principle block diagram of the steam heating pipeline described in this application. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer and more explicit, the following detailed description of this application is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0045] Please also refer to Figures 1-13 This application provides a steam heating pipe, as shown in the figure. Figure 4 As shown, the steam heating pipeline includes: a heating pipeline body 1, a polyurethane pipe 2, and at least two air bladders 3. The polyurethane pipe 2 is sleeved on the heating pipeline body 1; there is a space between the polyurethane pipe 2 and the heating pipeline body 1; the volume of the space is very small, only able to accommodate the at least two air bladders 3 in their uninflated state, so that the distance between the inner wall of the polyurethane pipe 2 and the heating pipeline body 1, except for the part in contact with the air bladders 3, can be minimized.

[0046] The plurality of airbags 3 are distributed sequentially at intervals along the circumference of the heating pipe body 1, and the length direction of each airbag 3 is arranged along the axial direction of the heating pipe body 1. The airbags 3 are connected to an external air source; when the airbags 3 are inflated, the airbags 3 support the polyurethane tube 2, thereby compressing the polyurethane tube 2.

[0047] In this application, an airbag 3 is added between the heating pipe body 1 and the polyurethane pipe 2. When the heating temperature of the heating pipe body 1 is too high, an external air source can be turned on to inflate the airbag 3. The airbag 3 expands and supports the polyurethane pipe 2, so that the polyurethane pipe 2 is compressed from the inside to the outside, thereby reducing the contact area between the polyurethane pipe 2 and the heating pipe body 1, thereby reducing the damage to the polyurethane pipe 2.

[0048] The at least two airbags 3 are evenly distributed along the circumference of the heating pipe body 1; in one embodiment of this application, there are four airbags 3, and the airbags 3 are high temperature resistant airbags 3.

[0049] like Figure 1As shown, the steam heating pipeline also includes an airtight device 4; the airtight device 4 is sleeved on the heating pipeline body 1 and is used to seal the two ends of the accommodating space along the axial direction of the polyurethane pipe 2 so that the accommodating space forms a sealed space.

[0050] like Figure 1 As shown, the airtight device 4 is provided with an air hole 5. One end of the air hole 5 is connected to the airbag 3, and the other end is connected to an external air source, so that the airbag 3 can be connected to an external air source through the air hole 5. Figure 5 As shown, the airbag 3 is provided with multiple through holes, each of which is connected to the sealed space. When an external air source is turned on to supply air to the airbag 3, the air inside the airbag 3 enters the sealed space through the through holes, thereby cooling the heating pipe body 1 and the polyurethane pipe 2 to a certain extent, and further effectively reducing the damage to the polyurethane pipe 2 caused by the high temperature generated by the heating pipe body 1.

[0051] In one embodiment of this application, the airbag 3 has an elliptical cross-section along the radial direction of the heating pipe body 1, which makes the airbag 3 thinner along the radial direction of the heating pipe body 1 when it is in an uninflated compressed state. This improves the fit between the polyurethane pipe 2 and the heating pipe body 1, reduces the distance between the polyurethane pipe 2 and the heating pipe body 1, minimizes the volume of the accommodating space, and further enhances the heat preservation effect of the polyurethane pipe 2 on the heating pipe body 1.

[0052] like Figures 1-4 As shown, the airtight device 4 includes two airtight parts 41, both of which are sleeved on the heating pipe body 1 and located on both sides of the axial direction of the polyurethane pipe 2. Both airtight parts 41 are in contact with the heating pipe body 1 and the polyurethane pipe 2, thereby sealing the accommodating space from both ends of the axial direction of the polyurethane pipe 2, so that the accommodating space forms a sealed space.

[0053] At least one airtight part 41 is provided with the air hole 5, such as Figure 4 As shown, the air hole 5 corresponds one-to-one with the airbag 3; specifically, one end of the air hole 5 is connected to the airbag 3, and the other end is connected to an external air source, thereby connecting the airbag 3 with the external air source so as to supply air to the airbag 3 through the external air source.

[0054] In one embodiment of this application, only one airtight part 41 is provided with the air hole 5, that is, the airbag 3 has an opening at only one end, and the air hole 5 is connected to the opening end of the airbag 3.

[0055] Another embodiment of this application, such as Figure 2As shown, each of the two airtight sections 41 is provided with an air hole 5, meaning that both ends of the airbag 3 are open, and the two ends of the airbag 3 are respectively connected to an external air source through the two air holes 5. When the external air source is turned on, air is supplied to both ends of the same airbag 3 simultaneously, so that even the long airbag 3 can expand evenly, thereby effectively ensuring that the expansion of the airbag 3 can compress the polyurethane tube 2.

[0056] The airtight section 41 includes an airtight ring 411 and an airtight structure; such as Figure 4 As shown, the airtight ring 411 is sleeved on the heating pipe body 1 and located on one side of the axial direction of the polyurethane pipe 2; the airtight ring 411 is in contact with the heating pipe body 1 and the polyurethane pipe 2 respectively, thereby sealing the accommodating space to form a closed space.

[0057] A through-hole structure is radially provided on the airtight ring 411. The airtight structure is disposed on the airtight ring 411 and arranged within the through-hole structure. The airtight structure can move radially within the through-hole structure to achieve either close contact with the heating pipe body 1 or away from the heating pipe body 1. The projection of the airtight structure onto the circumferential surface of the heating pipe body 1 completely covers the circumferential surface of the heating pipe body 1, allowing the airtight structure to be in close contact with the entire circumferential surface of the heating pipe body 1, thereby sealing the assembly gap between the airtight ring 411 and the heating pipe body 1 in the circumferential direction.

[0058] In this application, by adjusting the position of the airtight structure radially along the airtight ring 411, the airtight structure is ultimately adjusted to be tightly attached to the heating pipe body 1, further improving the tightness of the airtight ring 411 in sealing both ends of the accommodating space, that is, improving the airtightness of the sealed space, and preventing the gas from leaking out of the sealed space during the expansion of the airbag 3, thus preventing the airbag 3 from incompletely expanding; that is, the airtight structure is used to improve the airtightness between the airtight ring 411 and the heating pipe body 1, ensuring that the airbag 3 expands completely.

[0059] like Figures 6-8 As shown, the airtight structure includes multiple airtight moving units 410, and the through hole structure includes multiple through hole units 400. The airtight moving units 410 and the through hole units 400 correspond one-to-one, that is, each through hole unit 400 corresponds to one airtight moving unit 410, and the airtight moving unit 410 can move radially along the airtight ring 411 within the through hole unit 400.

[0060] Example 1 in this application, as follows Figure 6 As shown, multiple airtight moving units 410 are arranged sequentially along the circumference of the airtight ring 411; the circumference of the multiple airtight moving units 410 projected onto the circumferential surface of the heating pipe body 1 is equal to the circumference of the heating pipe body 1; when the airtight moving unit 410 is close to the heating pipe body 1, the ends of two adjacent airtight moving units 410 that are close to the heating pipe body 1 are in contact; multiple through hole units 400 are connected sequentially, so that all through hole units 400 form a ring.

[0061] In one embodiment of this invention, the number of airtight moving units 410, the number of through-hole units 400, and the number of air holes 5 on each airtight ring 411 are all equal to the number of airbags 3. Specifically, the airbags 3, the air holes 5, and the airtight moving units 410 are arranged in a one-to-one correspondence and are sequentially arranged along the axial direction of the polyurethane pipe 2; the air holes 5 and the airtight moving units 410 are arranged at intervals. In this application, the airtight moving units 410 are arranged at the corresponding air holes 5 so as to seal the airtight ring 411 and the heating pipe body 1 from the direction away from the air bag 3 through the airtight moving units 410, so as to prevent the airflow from being discharged away from the air bag 3 when the air holes 5 are ventilated, and ensure that when the external air source supplies air, the airflow can be completely supplied to the air bag 3 after passing through the air holes 5.

[0062] Embodiment 2 in this application, as Figure 2 As shown, multiple airtight moving units 410 are arranged in at least two groups along the axial direction of the airtight ring 411; as Figure 8 As shown, the airtight moving units 410 in each group are arranged sequentially at intervals along the circumference of the airtight ring 411; the circumference of the multiple airtight moving units 410 projected onto the circumferential surface of the heating pipe body 1 is greater than the circumference of the heating pipe body 1; adjacent groups of airtight moving units 410 are staggered to improve the effect of the airtight structure in sealing the assembly gap between the heating pipe body 1 and the airtight ring 411.

[0063] like Figure 12 As shown, the projection of any one airtight moving unit 410 in one group onto the circumferential surface of the heating pipe body 1 is in contact with the projections of the two adjacent airtight moving units 410 in another group onto the circumferential surface of the heating pipe body 1; so that when all airtight moving units 410 are in close contact with the heating pipe body 1, any one airtight moving unit 410 in one group is in contact with the two adjacent airtight moving units 410 in another group, and no air leakage gap is generated between the two adjacent groups of airtight moving units 410.

[0064] One implementation method in this embodiment, such as Figure 8 , Figure 9 and Figure 10 As shown, multiple airtight moving units 410 are arranged in two groups along the axial direction of the airtight ring 411, each group including four airtight moving units 410; similarly, multiple through-hole units 400 are arranged in two groups along the axial direction of the airtight ring 411, each group including four through-hole units 400, and each through-hole unit 400 corresponds one-to-one with an airtight moving unit 410. The vent 5 is located on the side of the multiple airtight moving units 410 closest to the polyurethane tube 2, and each vent 5 corresponds one-to-one with the group of airtight moving units 410 closest to it. The relative positions of the two groups of airtight moving units 410 differ by 45°.

[0065] Based on the above embodiment one or embodiment two, such as Figure 6 and Figure 8 As shown, the airtight moving unit 410 includes an arc-shaped elastic block 4101 and a screw 4102; the inner arc surface of the arc-shaped elastic block 4101 faces the heating pipe body 1, and the outer arc surface is connected to the screw 4102; the screw 4102 extends radially along the airtight ring 411, and one end of the screw 4102 away from the arc-shaped elastic block 4101 is located outside the airtight ring 411 for workers to hold, thereby adjusting the distance between the arc-shaped elastic block 4101 and the heating pipe body 1 by rotating the screw 4102 radially along the airtight ring 411, so that the arc-shaped elastic block 4101 is close to / away from the heating pipe body 1.

[0066] like Figure 4 As shown, the through-hole unit 400 includes an arc-shaped mounting groove 401 and a threaded hole 402; the arc-shaped mounting groove 401 is recessed radially outward from the inner surface of the airtight ring 411; the threaded hole 402 extends radially inward from the outer circumferential surface of the airtight ring 411 and communicates with the arc-shaped mounting groove 401; the arc-shaped elastic block 4101 is located in the arc-shaped mounting groove 401 and can reciprocate radially along the airtight ring 411; the screw 4102 is threadedly engaged with the threaded hole 402.

[0067] For Example 1, as Figure 6 As shown, four arc-shaped mounting grooves 401 are connected in sequence to form a ring; by turning four screws 4102, the four arc-shaped elastic blocks 4101 can be made to fit tightly against the heating pipe body 1. At this time, any two adjacent arc-shaped elastic blocks 4101 will be in contact with each other, thus forming a ring.

[0068] In Embodiment 2, the two ends of the arc-shaped elastic block 4101 along the circumference of the airtight ring 411 respectively contact the corresponding arc-shaped mounting groove 401, so that the arc-shaped elastic block 4101 can only move radially along the airtight ring 411 within the corresponding arc-shaped mounting groove 401; the length of the arc-shaped elastic block 4101 is greater than the distance between two adjacent arc-shaped mounting grooves 401 in the same group. The two ends of the arc-shaped mounting groove 401 in one group along the circumference of the airtight ring 411 respectively connect to two adjacent arc-shaped mounting grooves 401 in another group, so that the two ends of the arc-shaped elastic block 4101 in one group along the circumference of the airtight ring 411 can be tightly attached to two adjacent arc-shaped elastic blocks 4101 in another group along the axial direction of the airtight ring 411, thereby sealing the assembly gap between the airtight ring 411 and the heating pipe body 1 in the radial direction through all the arc-shaped elastic blocks 4101.

[0069] like Figures 8-10 As shown, the four airtight moving units 410 and four through-hole units 400 that are close to the air hole 5 along the axial direction of the airtight ring 411 constitute the first group 100, and the four airtight moving units 410 and four through-hole units 400 that are far away from the air hole 5 constitute the second group 200:

[0070] like Figure 11 As shown, in the first group 100, arc-shaped elastic blocks 101, 102, 103, and 104 are arranged sequentially at intervals. In the second group 200, the intervals between arc-shaped elastic blocks 101 and 102 in the first group 100 correspond to those between arc-shaped elastic blocks 101 and 102 in the first group 100, and the two ends of arc-shaped elastic blocks 201 in the second group 200 along the circumferential direction of the airtight ring 411 are in contact with arc-shaped elastic blocks 101 and 102 in the first group 100, respectively. The intervals between arc-shaped elastic blocks 202 in the second group 200 and 103 in the first group 100 correspond to those between arc-shaped elastic blocks 202 and 103 in the first group 100, and the two ends of arc-shaped elastic blocks 202 in the second group 200 along the circumferential direction of the airtight ring 411 are in contact with arc-shaped elastic blocks 202 and 103 in the first group 100, respectively. The spacing between the arc-shaped elastic block 203 in the second group 200 and the arc-shaped elastic block 103 and the arc-shaped elastic block 104 in the first group 100 corresponds to the spacing between them. The arc-shaped elastic block 203 in the second group 200 contacts the arc-shaped elastic block 103 and the arc-shaped elastic block 104 in the first group 100 at both ends along the circumference of the airtight ring 411. The spacing between the arc-shaped elastic block 204 in the second group 200 and the arc-shaped elastic block 104 and the arc-shaped elastic block 101 in the first group 100 corresponds to the spacing between them. The arc-shaped elastic block 204 in the second group 200 contacts the arc-shaped elastic block 104 and the arc-shaped elastic block 101 in the first group 100 at both ends along the circumference of the airtight ring 411.

[0071] Based on the above embodiment one or embodiment two, the vent 5 is an L-shaped vent 5. Specifically, the vent 5 includes a first extension hole 51 and a second extension hole 52. The first extension hole 51 is arranged radially along the airtight ring 411, and one end of it extends to the outer circumferential surface of the airtight ring 411. The second extension hole 52 is arranged axially along the airtight ring 411, and one end of it extends to the axial surface of the airtight ring 411 near the polyurethane tube 2. One end of the first extension hole 51 is connected to an external air source, and the other end is connected to the second extension hole 52.

[0072] like Figure 4 As shown, a sleeve 6 is arranged on the side of the airtight ring 411 near the polyurethane tube 2. One end of the sleeve 6 is connected to the airtight ring 411 and communicates with the second extension hole 52. The other end is inserted into the opening of the airbag 3, so that when the external air source supplies air to the air hole 5, the airflow can quickly and effectively enter the airbag 3.

[0073] like Figure 4 As shown, an air storage cavity 7 is provided at the junction of the first extension hole 51 and the second extension hole 52. The air storage cavity 7 is cylindrical, and its axis is parallel to the axis of the airtight ring 411. The length of the air storage cavity 7 along the axis of the airtight ring 411 is greater than the inner diameter of the first extension hole 51, and the diameter of the air storage cavity 7 is greater than the inner diameter of the second extension hole 52. When an external air source supplies air to the airbag 3 through the air hole 5, the air storage cavity 7 can buffer the airflow, preventing the airbag 3 from detaching from the sleeve 6 due to a sudden airflow, thus avoiding the phenomenon that airflow cannot easily enter the airbag 3.

[0074] like Figure 4 and Figure 8 As shown, an arc-shaped pad is also provided between the arc-shaped elastic block 4101 and the screw 4102. The arc-shaped pad is a rigid arc-shaped pad. In this application, the arc-shaped pad increases the contact area between the screw 4102 and the arc-shaped elastic block 4101, so that when the screw 4102 pushes the arc-shaped elastic block 4101, the arc-shaped elastic block 4101 can be subjected to uniform force, and effectively avoids the arc-shaped elastic block 4101 from concave deformation at the location corresponding to the screw 4102.

[0075] One embodiment of this application, such as Figures 1-3 As shown, the steam heating pipe also includes an outer shell 9, which is fitted over the polyurethane pipe 2 to further enhance the insulation performance from outside the polyurethane pipe 2. In one embodiment of this example, the outer shell 9 is made of iron.

[0076] One embodiment of this application, such as Figure 13As shown, the steam heating pipeline also includes a controller 10 and a temperature sensor 11; the controller 10 is connected to an external gas source and the temperature sensor 11; the temperature sensor 11 is installed on the heating pipeline body 1 to detect the temperature of the heating pipeline body 1.

[0077] When the temperature of the heating pipe body 1 reaches a preset value, the controller 10 controls the external air source to be turned on and supplies air to the airbag 3. The airbag 3 expands and supports the polyurethane pipe 2, causing the polyurethane pipe 2 to be compressed and deformed. The distance between the polyurethane pipe 2 and the heating pipe body 1 increases, reducing the contact area between the polyurethane pipe 2 and the heating pipe body 1, thereby effectively reducing the damage to the polyurethane pipe 2 caused by high temperature.

[0078] In summary, by adding an airbag between the heating pipe body and the polyurethane pipe in this application, when the heating temperature of the heating pipe body is too high, an external air source can be turned on to inflate the airbag. The inflated airbag supports the polyurethane pipe, causing the polyurethane pipe to be compressed from the inside out, thereby reducing the contact area between the polyurethane pipe and the heating pipe body, and thus reducing the damage rate of the polyurethane pipe.

[0079] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A steam heating pipeline, comprising a heating pipeline body and a polyurethane pipe, wherein the polyurethane pipe is sleeved on the heating pipeline body, characterized in that, It also includes: At least two airbags; There is a receiving space between the polyurethane pipe and the heating pipe body, and at least two airbags are located in the receiving space and are distributed sequentially at intervals along the circumference of the heating pipe body; the airbags are connected to an external air source; when the airbags are inflated, the airbags support the polyurethane pipe to compress the polyurethane pipe. An airtight device is fitted onto the heating pipe body and is used to seal the receiving space at both ends along the axial direction of the polyurethane pipe, so that the receiving space forms a sealed space. The airtight device is provided with air holes, which are connected to the airbag and an external air source respectively; the airbag is provided with multiple through holes, each of which is connected to the sealed space.

2. The steam heating pipeline according to claim 1, characterized in that, The airtight device includes: Two airtight sections are fitted onto the heating pipe body and are located on both sides of the axial direction of the polyurethane pipe, respectively. Both airtight sections are in contact with the heating pipe body and the polyurethane pipe, respectively; at least one airtight section is provided with an air hole, and the air hole corresponds one-to-one with the airbag.

3. The steam heating pipeline according to claim 2, characterized in that, The airtight portion includes: airtight ring; An airtight structure is provided on the airtight ring; The airtight ring has a through hole structure that runs radially through it. The airtight structure is arranged inside the through hole structure and can move radially along the airtight ring to be close to / away from the heating pipe body. The projection of the airtight structure toward the circumferential surface of the heating pipe body completely covers the circumferential surface of the heating pipe body.

4. The steam heating pipeline according to claim 3, characterized in that, The airtight structure includes multiple airtight moving units, and the through-hole structure includes multiple through-hole units. The airtight moving units correspond one-to-one with the through-hole units and can move radially within the through-hole units along the airtight ring.

5. The steam heating pipeline according to claim 4, characterized in that, Multiple airtight moving units are arranged sequentially along the circumference of the airtight ring; multiple through-hole units are connected sequentially; when the airtight moving unit is in close contact with the heating pipe body, two adjacent airtight moving units come into contact.

6. The steam heating pipeline according to claim 4, characterized in that, Multiple airtight moving units are arranged in at least two groups along the axial direction of the airtight ring; in each group, the airtight moving units are arranged sequentially at intervals along the circumference of the airtight ring; the circumference of the multiple airtight moving units projected onto the circumferential surface of the heating pipe body is greater than the circumference of the heating pipe body; adjacent groups of airtight moving units are staggered; any airtight moving unit in one group is in contact with two adjacent airtight moving units in the other group.

7. The steam heating pipeline according to claim 4, characterized in that, The airtight moving unit includes: An arc-shaped elastic block is arranged with its inner arc surface facing the heating pipe body; The screw is disposed on the outer arc surface of the arc-shaped elastic block and extends radially along the airtight ring.

8. The steam heating pipeline according to claim 7, characterized in that, The through-hole unit includes: An arc-shaped mounting groove is recessed radially outward from the inner surface of the airtight ring; A threaded hole extends radially inward from the outer circumferential surface of the airtight ring and communicates with the arc-shaped mounting groove. The arc-shaped elastic block is located in the arc-shaped mounting groove and can reciprocate radially along the airtight ring; the screw is threadedly engaged with the threaded hole.

9. The steam heating pipeline according to claim 1, characterized in that, The cross-section of the airbag along the radial direction of the heating pipe body is elliptical.

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