CN223794798U - Heat supply pipeline installation fixing device - Google Patents
Heat supply pipeline installation fixing deviceInfo
- Publication number
- CN223794798U CN223794798U CN202520729977.0U CN202520729977U CN223794798U CN 223794798 U CN223794798 U CN 223794798U CN 202520729977 U CN202520729977 U CN 202520729977U CN 223794798 U CN223794798 U CN 223794798U
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- sleeve
- fixed
- bearing
- guide cylinder
- backup pad
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Abstract
The utility model discloses a heat supply pipeline installation fixing device, which comprises a vertical outer support plate, wherein a through hole is formed in the middle of the outer support plate, a heat supply pipe is installed in the through hole in a penetrating manner, two sides of the outer support plate are also provided with protection sleeves sleeved outside the heat supply pipe, two ends of the protection sleeves and the heat supply pipe are sealed by annular plates at the end parts, and an installation cavity is formed between the protection sleeves and the heat supply pipe. The utility model can effectively reduce the thrust of the fixed node and effectively control the deformation of the pipeline at the fixed node, better protect the position of the heat supply pipeline node and greatly improve the node safety.
Description
Technical Field
The utility model relates to the field of heat supply pipelines, in particular to a method for fixing a directly buried pipeline.
Background
The heat supply pipeline is a common device widely applied to long-distance transmission of heat flow media. The heat supply pipeline is the most commonly adopted system form for central heat supply in China. In the working process of the heat supply pipeline, the deformation caused by heat expansion and cold contraction can be gradually accumulated and expanded along the axial direction of the pipeline, so that the great destructive effect is formed at the positions of stress accumulation nodes (follow-up nodes for short) such as an elbow, a reducing, a folding point and a tee joint of the pipeline, and potential safety hazards and accidents are brought. In order to solve this problem, it is generally necessary to provide a fixed joint structure at the position of the heat supply pipe near the joint such as the elbow, the reducing, the folding point, and the tee.
The existing heat supply pipeline fixed mounting structure is characterized in that a fixed concrete is poured and arranged on the ground near the stress accumulation node position of the heat supply pipeline, and then the heat supply pipeline is directly fixed on the fixed concrete, so that axial push-pull stress generated by the heat expansion and cold contraction effect of the heat supply pipeline in the axial direction can directly act on the fixed concrete, and further an elbow, a reducing, a folding point or a tee joint at the stress accumulation node position is protected from being damaged.
However, in the existing fixed joint structure, the heat supply pipeline is directly fixed on the fixed concrete, and when the push-pull stress in the axial direction of the pipeline is excessively accumulated, the heat supply pipeline is easily damaged at the fixed concrete position, so that potential safety hazards are brought.
In addition, CN201710285792.5 discloses a method for laying hot water pipeline in a non-compensating manner, in which a fixed pipe rack is arranged in the pipeline at intervals and connected with the hot water pipeline, so that the hot water pipeline is forced to freely stretch and retract in the axial direction, the pipeline is utilized to bear the stress effect, and then a pipeline compensator is omitted, so that the non-compensating treatment on the hot water pipeline at the elbow, the tee joint and the reducing position is realized. However, in the laying structure, the axial expansion deformation of the hot water pipeline still directly acts on the fixed pipe rack, and accumulated axial deformation stress cannot be converted and dissipated, so that potential safety hazards are still easily caused for a long time.
Therefore, how to develop a heating pipeline installation and fixation technology capable of better reducing potential safety hazards and improving the protection effect and safety performance of a pipeline becomes a problem to be considered by those skilled in the art.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model aims to provide the heat supply pipeline installation fixing device which can better protect the position of the heat supply pipeline node and improve the safety.
In order to solve the technical problems, the utility model adopts the following technical scheme:
The utility model provides a heating pipeline installs fixing device, including a vertical outer backup pad, open at outer backup pad middle part has the through-hole, run through the installation heating tube in the through-hole, outer backup pad both sides still are provided with the protection sleeve who cup joints outside the heating tube, rely on the annular closure setting of tip between protection sleeve both ends and the heating tube and form the installation cavity between protection sleeve and the heating tube, a serial communication port, the installation cavity still is provided with an annular interior backup pad along radial fixed on the heating tube of outer backup pad both sides respectively on the heating tube of outer backup pad both sides, all be provided with force-bearing mechanism between the interior backup pad of both sides and the outer backup pad respectively, force-bearing mechanism includes along the axial setting and acts on the heliciform force-bearing spring between interior backup pad and the outer backup pad.
Thus, when the device is used, the outer support plate can be poured and fixed on fixed concrete near the joint of the heat supply pipeline or on a partition wall or a mounting frame in a pipe gallery. After the heat supply pipeline generates push-pull stress of axial deformation, the push-pull stress is acted on the fixed concrete through the spring to be counteracted, so that impact on the pipeline structure at the joint is avoided, and the joint protection is realized. And meanwhile, the elastic space formed by the springs can accommodate a certain axial deformation amount of the heat supply pipeline, and the energy of the pipeline deformation is absorbed and converted into internal energy to be dissipated. Therefore, the heat supply pipeline is not easy to damage at the fixed installation position, and better safety is achieved. Wherein the node refers to the position of a heat supply pipeline elbow, a reducing, a folding point or a tee joint.
Further, the outer surface of the heat supply pipe at the outer sides of the two ends of the protection sleeve is also provided with a heat supply pipe heat insulation layer.
Further, the heat pipe insulating layer is made of polyurethane materials.
The polyurethane heat-insulating layer is arranged outside the heat supply pipe to form a heat supply pipeline, so that heat is better preserved.
Further, a layer of heat supply pipe outer pipe is sleeved outside the heat supply pipe heat preservation layer. Realizing better heat preservation and protection. When in implementation, the outer tube of the heating tube is made of polyethylene, aluminum skin, galvanized iron sheet and other materials.
Further, sleeve heat preservation layers are further arranged on the outer periphery of the protective sleeve and the outer sides of the two ends of the protective sleeve. The interior can be better insulated.
Further, the sleeve heat-insulating layer is made of aerogel. Has the advantages of convenient construction, good heat preservation effect, etc.
Further, a layer of sleeve outer protective tube is arranged outside the sleeve heat-insulating layer. Realizing better heat preservation and protection.
Further, the protective sleeve is made of steel pipe materials. So that it has sufficient strength.
Further, the sleeve outer protection tube is made of aluminum skin or galvanized iron sheet materials.
Further, a ribbed plate along the axial direction is fixedly arranged between the two sides of the inner supporting plate and the outer surface of the heating pipe.
Therefore, the fixing effect between the inner support plate and the heating pipe can be better improved, and the transmission of force is ensured.
Further, the force bearing mechanism comprises a guide cylinder and a guide column which are coaxially arranged and one end of the guide cylinder are slidably sleeved and matched, the guide cylinder and the guide column are axially arranged along the heat supply pipe, the force bearing spring is sleeved outside the guide cylinder and the guide column, and the other end of the guide cylinder and the guide column deviating from the matched end is a fixed end and is respectively connected and fixed on the inner support plate and the outer support plate.
The guide cylinder and the guide column can better guide the bearing spring, so that the bearing spring can generate compression deformation along the length direction of the heat supply pipe more stably, and the effect of absorbing the deformation stress of the pipeline better is achieved.
Further, a radial outward annular bearing plate is fixedly arranged at the middle part of the guide cylinder, the end, in the same direction, of the bearing spring and the fixed end of the guide cylinder is propped against and connected to the bearing plate, an outer limit sleeve is coaxially sleeved outside the guide cylinder, one end, in the same direction, of the fixed end of the outer limit sleeve and the fixed end of the guide column and the guide column are fixed on the same component, a radial inward annular limit plate is fixedly arranged at the other end of the outer limit sleeve, and the outer surfaces of an inner ring of the limit plate and the guide cylinder form slidable clearance fit and are located at an area position between the bearing plate and the fixed end of the guide cylinder.
Therefore, after the deformation generated by the expansion and contraction of the heat supply pipeline along the axial direction is accumulated to the fixed concrete position, the larger axial deformation displacement is generated, and meanwhile, the radial deformation displacement is also caused to a certain extent. The structure is additionally provided with the outer limit sleeve and the limit plate structure, so that the coaxiality between the guide cylinder and the guide column can be better ensured to ensure that the bearing direction of the bearing spring is stable along the axial direction, the elastic deformation of the structure can be utilized to absorb the deformation displacement of the heat supply pipeline in the radial direction, and the stability of the node structure is better ensured.
Further, the external diameter of the bearing plate is larger than the external diameter of the bearing spring when the bearing spring is not pressed and smaller than the maximum external diameter of the bearing spring when the bearing spring is pressed, an inner limiting sleeve is coaxially sleeved in the outer limiting sleeve, the fixed end of the inner limiting sleeve is fixed on the side surface of the limiting plate, the other end of the inner limiting sleeve is a suspended open end and extends to a length position adjacent to the matching end of the guide cylinder, and the inner cavity of the inner limiting sleeve and the outer ring of the bearing plate form slidable clearance fit.
Therefore, further by means of sliding clearance fit between the inner limiting sleeve and the bearing plate, axial coaxiality is guaranteed while axial bearing is carried out, and meanwhile, deformation displacement from the radial direction can be absorbed through elastic deformation among the inner limiting sleeve, the limiting plate and the outer limiting sleeve. The inner limit sleeve can better ensure the stability of deformation of the force-bearing spring along the force-bearing direction, so that the force-bearing spring can freely stretch out and draw back at the initial stage of compression, then after being compressed to a certain extent, the outer diameter of the force-bearing spring is enlarged and gradually butts against the inner cavity wall of the inner limit sleeve, and after being limited by the inner limit sleeve, the force-bearing spring and the inner limit sleeve generate strong friction deformation, so that the compression damping of the force-bearing spring has an accelerating enhancement effect, the axial elasticity is quickly converted into radial extrusion force, and the conversion dissipation of energy is quickly completed.
Further, the guide cylinder, the guide post, the inner limit sleeve, the bearing plate and the outer limit sleeve are all made of spring steel.
The elasticity of the spring steel is utilized, so that the double effects of ensuring the stability of the bearing spring along the axial bearing force and absorbing the deformation displacement of the heat supply pipeline in the radial direction can be better achieved.
Further, one end of the bearing spring is welded and fixed on the bearing plate, and the other end of the bearing spring is welded and fixed on a member fixed by the fixed end of the guide post.
Therefore, when the bearing spring on one side of the outer support plate bears the pressure from the axial direction, the bearing spring on the other side bears the tensile force, and the bearing spring can better bear the deformation stress from the axial direction.
Further, the bearing mechanism further comprises two load plates which are oppositely arranged, the fixed ends of the guide cylinder and the guide column are respectively fixed on the two load plates, and the two load plates are fixed on the corresponding outer support plate and inner support plate.
Thus, the assembly of the bearing mechanism is conveniently finished in advance, and then the bearing mechanism is integrally installed between the outer support plate and the inner support plate, so that the structure construction setting is facilitated.
Further, the bearing mechanisms are multiple and uniformly distributed along the circumferential direction.
In addition, when the structure is implemented, a plurality of heat supply pipeline fixing joint structures can be arranged on the heat supply pipeline close to the node in series along the axial direction, so that the deformation is better absorbed, and the structural stability effect of the node is ensured.
In summary, the utility model can absorb and convert the deformation stress of the heat supply pipeline along the axial direction and the radial direction, better realize the protection of the node position of the heat supply pipeline, and greatly improve the node safety.
Drawings
FIG. 1 is a schematic view of the structure of the utility model after installation.
Fig. 2 is a left cross-sectional view of fig. 1.
Fig. 3 is a schematic view of the individual force bearing mechanism of fig. 1.
Detailed Description
The present utility model will be described in further detail with reference to the following embodiments.
1-3, Including a vertical outer backup pad 2, open at the middle part of outer backup pad 2 has the through-hole, run through in the through-hole and install heating tube 3, outer backup pad 2 both sides still are provided with the protection sleeve 4 that cup joints outside the heating tube, rely on the annular plate 12 closure setting of tip between protection sleeve 4 both ends and the heating tube and form the installation cavity between protection sleeve 4 and heating tube 3, the installation cavity still is provided with an annular interior backup pad 5 along radial fixation on the heating tube of outer backup pad both sides respectively on the heating tube of outer backup pad both sides, all be provided with force-bearing mechanism between the interior backup pad 5 of both sides and outer backup pad 2 respectively, force-bearing mechanism includes along the axial setting and acts on the heliciform force-bearing spring 6 between interior backup pad and the outer backup pad.
Therefore, when the device is used, the fixing can be realized at the pipeline node position of the directly buried heating pipeline, and the outer support plate is poured and fixed on the fixed concrete 1 close to the pipeline node position. The pipeline is elastically connected to the fixed concrete by means of the axial spring, so that the axial push-pull stress generated by the axial deformation accumulated under the action of heat expansion and cold contraction of the heat supply pipeline can still be counteracted by acting on the fixed concrete along the axial direction, and the stress of the node position is reduced to form protection. The heat supply pipeline and the fixed concrete are elastically connected, so that a certain deformation space is formed by the spring, the deformation quantity accumulated along the axial direction of the heat supply pipeline can be accommodated and absorbed, and the energy generated by the deformation of the pipeline can be better converted into elastic potential energy and further converted into internal energy to be dissipated by the spring. Therefore, the safety of the node position is better ensured.
In addition, when the heating pipeline is installed in the pipe gallery, the device can be used for being fixed on partition walls or partition installation racks which are uniformly arranged at intervals in the pipe gallery. Therefore, a fixing method for reducing stress is provided for uncompensated laying of the overhead heat supply pipeline in the pipe gallery, and the safety of the heat supply pipeline in the pipe gallery is better improved.
Wherein, the heat supply pipe surface outside the protection sleeve 4 both ends still is provided with heat supply pipe heat preservation 7.
Wherein the heat supply pipe heat-insulating layer 7 is made of polyurethane material.
The polyurethane heat-insulating layer is arranged outside the heat supply pipe to form a heat supply pipeline, so that heat is better preserved.
Wherein, the heat supply pipe insulating layer 7 is also sleeved with a layer of heat supply pipe outer pipe 8. Realizing better heat preservation and protection. In the implementation, the outer tube 8 of the heating tube is made of polyethylene, aluminum skin, galvanized iron sheet and other materials.
Wherein, sleeve heat preservation 9 is still provided with in protection sleeve 4 periphery and both ends outside. The interior can be better insulated.
Wherein, sleeve heat preservation 9 adopts aerogel to make. Has the advantages of convenient construction, good heat preservation effect, etc.
Wherein, sleeve heat preservation 9 still is provided with one deck sleeve outer protection tube 10 outward. Realizing better heat preservation and protection.
Wherein, the protection sleeve 4 is made of steel pipe materials. So that it has sufficient strength.
Wherein, the sleeve outer protection tube 10 is made of aluminum skin or galvanized iron sheet materials.
Wherein, the rib plates 11 along the axial direction are also fixedly arranged between the two sides of the inner supporting plate 5 and the outer surface of the heating pipe 3.
Therefore, the fixing effect between the inner support plate and the heating pipe can be better improved, and the transmission of force is ensured.
Wherein, the force bearing mechanism includes coaxial setting and one end slidable cup joints matched guide cylinder 13 and guide post 14, and guide cylinder and guide post set up along the heating pipe axial just force bearing spring 6 cover is established outside guide cylinder and guide post, and guide cylinder and guide post deviate from the other end of matched end and be the stiff end and connect respectively and fix in inside backup pad and outer backup pad.
The guide cylinder and the guide column can better guide the bearing spring, so that the bearing spring can generate compression deformation along the length direction of the heat supply pipe more stably, and the effect of absorbing the deformation stress of the pipeline better is achieved.
The middle part of the guide cylinder 13 is fixedly provided with a radial outward annular bearing plate 15, the end, in the same direction, of the bearing spring 6 and the fixed end of the guide cylinder is propped against and connected to the bearing plate 15, an outer limit sleeve 16 is coaxially sleeved outside the guide cylinder, one end, in the same direction, of the fixed end of the outer limit sleeve 16 and the fixed end of the guide column 14 and the guide column 14 are fixed on the same component, the other end of the outer limit sleeve 16 is fixedly provided with a radial inward annular limit plate 17, and the inner ring of the limit plate 17 and the outer surface of the guide cylinder 13 form slidable clearance fit and are located in an area position between the bearing plate and the fixed end of the guide cylinder.
Therefore, after the deformation generated by the expansion and contraction of the heat supply pipeline along the axial direction is accumulated to the fixed concrete position, the larger axial deformation displacement is generated, and meanwhile, the radial deformation displacement is also caused to a certain extent. The structure is additionally provided with the outer limit sleeve and the limit plate structure, so that the coaxiality between the guide cylinder and the guide column can be better ensured to ensure that the bearing direction of the bearing spring is stable along the axial direction, the elastic deformation of the structure can be utilized to absorb the deformation displacement of the heat supply pipeline in the radial direction, and the stability of the node structure is better ensured.
The outer diameter of the bearing plate 15 is larger than the outer diameter of the bearing spring 6 when the bearing spring 6 is not pressed and smaller than the maximum outer diameter of the bearing spring 6 when the bearing spring 6 is pressed, an inner limiting sleeve 18 is coaxially sleeved in the outer limiting sleeve, the fixed end of the inner limiting sleeve 18 is fixed on the side surface of the limiting plate, the other end of the inner limiting sleeve is a suspended open end and extends to a length position adjacent to the matched end of the guide cylinder 13, and the inner cavity of the inner limiting sleeve 18 and the outer ring of the bearing plate 15 form slidable clearance fit.
Thus, by means of the sliding clearance fit between the inner limit sleeve and the bearing plate, the axial coaxiality is ensured while the axial bearing is carried out, and the deformation displacement from the radial direction can be absorbed better through the elastic deformation among the inner limit sleeve, the limit plate and the outer limit sleeve. The inner limit sleeve can better ensure the stability of deformation of the force-bearing spring along the force-bearing direction, so that the force-bearing spring can freely stretch out and draw back at the initial stage of compression, then after being compressed to a certain extent, the outer diameter of the force-bearing spring is enlarged and gradually butts against the inner cavity wall of the inner limit sleeve, and after being limited by the inner limit sleeve, the force-bearing spring and the inner limit sleeve generate strong friction deformation, so that the compression damping of the force-bearing spring has an accelerating enhancement effect, the axial elasticity is quickly converted into radial extrusion force, and the conversion dissipation of energy is quickly completed.
The guide cylinder 13, the guide column 14, the inner limit sleeve 18, the bearing plate 15 and the outer limit sleeve 16 are all made of spring steel.
The elasticity of the spring steel is utilized, so that the double effects of ensuring the stability of the bearing spring along the axial bearing force and absorbing the deformation displacement of the heat supply pipeline in the radial direction can be better achieved.
One end of the force-bearing spring 6 is welded and fixed on the force-bearing plate 15, and the other end is welded and fixed on a member fixed by the fixed end of the guide post 14.
Therefore, when the bearing spring on one side of the outer support plate bears the pressure from the axial direction, the bearing spring on the other side bears the tensile force, and the bearing spring can better bear the deformation stress from the axial direction.
The bearing mechanism further comprises two load plates 19 which are oppositely arranged, the fixed ends of the guide cylinder and the guide column are respectively fixed on the two load plates, and the two load plates are fixed on the corresponding outer support plate and inner support plate.
Thus, the assembly of the bearing mechanism is conveniently finished in advance, and then the bearing mechanism is integrally installed between the outer support plate and the inner support plate, so that the structure construction setting is facilitated.
Wherein, the bearing mechanism has a plurality ofly and evenly arranges along circumference.
In addition, when the structure is implemented, a plurality of heat supply pipeline fixing joint structures can be arranged on the heat supply pipeline close to the node in series along the axial direction, so that the deformation is better absorbed, and the structural stability effect of the node is ensured.
Claims (10)
1. The utility model provides a heating pipeline installs fixing device, including a vertical outer backup pad, open at outer backup pad middle part has the through-hole, run through the installation heating tube in the through-hole, outer backup pad both sides still are provided with the protection sleeve who cup joints outside the heating tube, rely on the annular closure setting of tip between protection sleeve both ends and the heating tube and form the installation cavity between protection sleeve and the heating tube, a serial communication port, the installation cavity still is provided with an annular interior backup pad along radial fixed on the heating tube of outer backup pad both sides respectively on the heating tube of outer backup pad both sides, all be provided with force-bearing mechanism between the interior backup pad of both sides and the outer backup pad respectively, force-bearing mechanism includes along the axial setting and acts on the heliciform force-bearing spring between interior backup pad and the outer backup pad.
2. The heating pipe installation fixture of claim 1, wherein the outer surfaces of the heating pipes outside the two ends of the protective sleeve are further provided with heat-pipe insulation layers.
3. A heating pipe installation fixture as claimed in claim 2, wherein the heating pipe insulation is made of polyurethane material.
4. A heating pipe installation fixture as claimed in claim 3, wherein the heating pipe insulation is further provided with a layer of heating pipe outer pipe.
5. The heating pipeline installation and fixation device as claimed in claim 1, wherein the outer circumference and the outer sides of the two ends of the protection sleeve are further provided with a sleeve heat-insulating layer, and the sleeve heat-insulating layer is made of aerogel.
6. The heating pipeline installation and fixation device as claimed in claim 5, wherein a layer of sleeve outer protection pipe is arranged outside the sleeve heat-insulating layer, the protection sleeve is made of steel pipe materials, and the sleeve outer protection pipe is made of aluminum skin, galvanized iron sheet or stainless steel plate materials.
7. A heating pipe installation fixture as claimed in claim 1, wherein ribs are also fixedly provided along the axial direction between the sides of the inner support plate and the outer surface of the heating pipe.
8. The heating pipe installation fixing device according to claim 1, wherein the force-bearing mechanism comprises a guide cylinder and a guide column which are coaxially arranged and one end of which is slidably sleeved and matched, the guide cylinder and the guide column are axially arranged along the heating pipe, the force-bearing spring is sleeved outside the guide cylinder and the guide column, and the other end of the guide cylinder and the guide column, which is away from the matched end, is a fixed end and is respectively connected and fixed on the inner support plate and the outer support plate.
9. The heat supply pipeline installation fixing device according to claim 8, wherein a radial outward annular bearing plate is fixedly arranged at the middle part of the guide cylinder, the end, in the same direction, of the bearing spring and the fixed end of the guide cylinder is propped against and connected to the bearing plate, an outer limit sleeve is coaxially sleeved outside the guide cylinder, one end, in the same direction, of the fixed end of the outer limit sleeve and the fixed end of the guide cylinder is fixed to the same component, the other end of the outer limit sleeve is fixedly provided with a radial inward annular limit plate, and the inner ring of the limit plate and the outer surface of the guide cylinder form slidable clearance fit and are located at the area position between the bearing plate and the fixed end of the guide cylinder.
10. The heating pipeline installation fixing device according to claim 9, wherein the outer diameter of the bearing plate is larger than the outer diameter of the bearing spring when the bearing spring is not pressed and smaller than the maximum outer diameter of the bearing spring when the bearing spring is pressed, an inner limit sleeve is coaxially sleeved in the outer limit sleeve, the fixed end of the inner limit sleeve is fixed on the side surface of the limit plate, the other end of the inner limit sleeve is a suspended open end and extends to a length position adjacent to the matched end of the guide cylinder, and the inner cavity of the inner limit sleeve and the outer ring of the bearing plate form slidable clearance fit;
the guide cylinder, the guide column, the inner limit sleeve, the bearing plate and the outer limit sleeve are all made of spring steel;
One end of the bearing spring is welded and fixed on the bearing plate, and the other end of the bearing spring is welded and fixed on a member fixed by the fixed end of the guide post;
The bearing mechanism further comprises two load plates which are oppositely arranged, the fixed ends of the guide cylinder and the guide column are respectively fixed on the two load plates, and the two load plates are fixed on the corresponding outer support plate and inner support plate;
the bearing mechanisms are multiple and uniformly distributed along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520729977.0U CN223794798U (en) | 2025-04-17 | 2025-04-17 | Heat supply pipeline installation fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520729977.0U CN223794798U (en) | 2025-04-17 | 2025-04-17 | Heat supply pipeline installation fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223794798U true CN223794798U (en) | 2026-01-13 |
Family
ID=98357086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202520729977.0U Active CN223794798U (en) | 2025-04-17 | 2025-04-17 | Heat supply pipeline installation fixing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223794798U (en) |
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2025
- 2025-04-17 CN CN202520729977.0U patent/CN223794798U/en active Active
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