An internal chimney structure in a mountain

Abstract

The utility model relates to the technical field of concealed engineering discloses a mountain interior flue structure, including outlet flue, the outlet flue is prefabricated pipe fitting, is located in the drilling that is communicated to the main flue of mountain structure surface opening, and prefabricated pipe fitting one end exposes in mountain structure, other end and the main flue in the inside of mountain structure are communicated, the utility model discloses an outlet flue is designed as prefabricated pipe fitting, and the drilling is inserted prefabricated pipe fitting on the surface of mountain structure, has reduced the exposure degree in the construction process. Compared with open cut construction, the present flue result does not need large -area soil breaking, reduces the damage of ecological vegetation, effectively satisfies the environmental protection requirement. Meanwhile, since reducing the exposed building volume, the problem that is difficult to shield is solved, and the problem of large -area exposure and serious ecological damage brought by mountain body is avoided.

Description

Technical Field

[0001] This utility model relates to the field of concealed engineering technology, specifically to a smoke duct structure inside a mountain. Background Technology

[0002] The flue outlets located on hillsides are mostly constructed of reinforced concrete with rectangular cross-sections. Due to their large size, open-cut excavation is often required. The construction process involves first excavating, and then backfilling to cover the flue structure after it has taken shape. However, even with this method, a considerable amount of the flue remains exposed.

[0003] This construction method has three major drawbacks: First, the open-cut construction process is extremely easy to expose; second, it severely damages the ecological vegetation and does not meet environmental protection requirements; third, the exposed building volume after completion is too large and difficult to effectively conceal. Considering the actual situation of the mountain slope, the exposed area during construction is further increased, and the degree of damage to the ecological vegetation is also intensified. Utility Model Content

[0004] In view of this, the present invention provides a flue structure inside a mountain to solve the problem that the open-cut construction process at the flue outlet is large and causes serious damage to the ecological environment.

[0005] This utility model provides a chimney structure inside a mountain, including:

[0006] The outlet flue is a prefabricated pipe fitting located in a borehole on the surface of the mountain structure that connects to the main flue. One end of the prefabricated pipe fitting is exposed outside the mountain structure, and the other end is connected to the main flue inside the mountain structure.

[0007] Optionally, the prefabricated pipe fitting has an internal support structure, which is adapted to improve the structural strength of the prefabricated pipe fitting.

[0008] Optionally, the support structure includes a first support member and a plurality of second support members. The first support member is coaxially arranged with the precast pipe and its inner diameter is smaller than that of the precast pipe. One end of the second support member is connected to the outer wall of the first support member and the other end is connected to the inner wall of the precast pipe. The plurality of second support members are arranged at intervals along the circumference of the precast pipe.

[0009] Optionally, a branch flue is also provided on the main flue, and the outlet flue is provided on the branch flue.

[0010] Optionally, the number of branch flues is multiple, and they are spaced apart.

[0011] Optionally, the branch flue is a prefabricated pipe fitting.

[0012] Optionally, the prefabricated pipe fitting is a metal prefabricated pipe fitting, and the branch flue and the outlet flue are fixedly connected by welding.

[0013] Optionally, the axial direction of the branch flue is perpendicular to the axial direction of the main flue, and the axial direction of the outlet flue is perpendicular to the axial direction of the branch flue.

[0014] Optionally, both the branch flue and the outlet flue include multiple pipe sections connected in sequence.

[0015] Optionally, the space between the borehole and the outlet flue is filled with cement mortar.

[0016] Beneficial effects

[0017] This utility model provides an internal flue structure for a mountain, including an outlet flue. The outlet flue is a prefabricated pipe component. The prefabricated outlet flue pipe component is inserted into a hole drilled in the mountain structure surface, connecting to the main flue. One end of the prefabricated outlet flue pipe component is exposed outside the mountain structure, while the other end connects to the main outlet flue inside the mountain structure. By designing the outlet flue as a prefabricated pipe component and drilling holes in the mountain structure surface to insert it, the degree of exposure during construction is reduced. Compared to open-cut construction, this flue structure does not require large-scale soil excavation, reducing damage to ecological vegetation and effectively meeting environmental protection requirements. Simultaneously, by reducing the exposed building volume, the problem of difficulty in concealment is solved, and the problems of large-scale exposure and severe ecological damage caused by mountain slope excavation are avoided. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a side view of an internal flue structure of a mountain according to an embodiment of the present utility model;

[0020] Figure 2 This is a side view of the connection between the outlet flue and the branch flue in an embodiment of the present invention;

[0021] Figure 3 This is a top view of an internal flue structure of a mountain according to an embodiment of the present utility model;

[0022] Figure 4 This is a cross-sectional schematic diagram of the outlet flue of this utility model embodiment;

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Outlet flue; 2. Main flue; 3. Support structure; 31. First support component; 32. Second support component; 4. Branch flue; 5. Cement mortar. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] The following is combined with Figures 1 to 4 The following describes embodiments of the present invention.

[0027] According to an embodiment of the present invention, an internal flue structure for a mountain is provided, comprising:

[0028] The outlet flue 1 is a prefabricated pipe fitting, which is installed in a borehole on the surface of the mountain structure and connected to the main flue 2. One end of the prefabricated pipe fitting is exposed outside the mountain structure, and the other end is connected to the main flue 2 inside the mountain structure.

[0029] Intuitively, drilling into the surface of a mountain structure can be done manually or using machinery. Manual excavation is suitable for large-diameter boreholes in areas with stable geology and low environmental disturbance requirements. Workers use tools like shovels to excavate, simultaneously digging and protecting the borehole wall. However, this method is labor-intensive, slow, and becomes significantly more difficult in complex geological conditions. Among machinery-based drilling methods, rotary drilling rigs are suitable for soil layers, sand layers, and some soft rock, using a drill bit to extract soil, resulting in high efficiency. Impact drilling rigs are used for hard rock, using impact drill bits to break the rock and create holes. They offer stable quality but are expensive, have strict site requirements, and generate noise and vibration, necessitating noise reduction in noise-sensitive areas.

[0030] It's easy to understand that in actual construction, due to the limited length of prefabricated pipes, multiple pipes need to be joined together to a suitable length through welding. To ensure the effectiveness of the flue, seamless welding is usually used. Seamless welding can significantly reduce the risk of gas leakage at the weld, ensure stable airflow inside the flue, reduce energy loss, and improve smoke extraction efficiency.

[0031] Specifically, in this embodiment, prefabricated pipe sections with a length of 600mm to 1000mm are selected. This length is chosen solely for ease of transportation and on-site welding. In other embodiments, pipe sections of other lengths can be selected depending on the specific construction conditions. No restrictions are placed on the selection of the length of the prefabricated pipe sections.

[0032] It should be noted that, in this embodiment, the prefabricated pipe fittings are made of circular steel pipes with a diameter of 3000mm and a wall thickness of 12mm. The large diameter of 3000mm provides a spacious flue gas flow channel, effectively reducing the flow resistance of flue gas within the flue and improving exhaust efficiency, making it suitable for the exhaust needs of large-scale industrial production or densely populated areas. The 12mm wall thickness gives the circular steel pipe good compressive strength, enabling it to withstand the high air pressure inside the flue and the pressure that may be exerted by the external mountain structure, ensuring the structural stability of the flue under complex working conditions.

[0033] The internal flue structure provided in this embodiment reduces the degree of exposure during construction by designing the outlet flue 1 as a prefabricated pipe and drilling holes in the surface of the mountain structure to insert the prefabricated pipe. Compared with open-cut construction, this flue structure does not require large-scale soil excavation, reducing damage to ecological vegetation and effectively meeting environmental protection requirements. At the same time, by reducing the exposed building volume, the problem of difficulty in shielding is solved, and the problems of large-scale exposure and serious ecological damage caused by mountain slope are avoided.

[0034] Furthermore, a support structure 3 is provided inside the precast pipe fitting, which is suitable for improving the structural strength of the precast pipe fitting.

[0035] In simple terms, the support structure 3 inside the precast pipe enhances its structural strength, enabling the precast pipe to maintain a stable shape and integrity when subjected to pressure inside the flue and forces from the external mountain structure. This reduces the risk of deformation, ensures long-term stable operation of the flue, reduces the frequency and cost of maintenance due to structural damage, guarantees normal operation of the flue, and the enhanced structural strength can cope with complex environmental conditions, expanding the applicability of flue structures inside the mountain.

[0036] Furthermore, the support structure 3 includes a first support member 31 and a plurality of second support members 32. The first support member 31 is coaxially arranged with the precast pipe and its inner diameter is smaller than that of the precast pipe. One end of the second support member 32 is connected to the outer wall of the first support member 31 and the other end is connected to the inner wall of the precast pipe. The plurality of second support members 32 are arranged at intervals along the circumference of the precast pipe.

[0037] In a straightforward manner, the first support member 31 is coaxially arranged inside the precast pipe, effectively balancing the internal pressure of the flue and the forces exerted by the external mountain. The second support member 32 is connected at one end to the outer wall of the first support member 31 and at the other end to the inner wall of the precast pipe, and is distributed circumferentially to efficiently transfer the force on the first support member 31 to the inner wall, strengthening the structural strength of the precast pipe, improving its resistance to deformation, ensuring balanced force distribution in all directions of the flue under complex stress conditions, enhancing stable operation, and extending the service life of the flue. In this embodiment, the first support member 31 is a circumferential stiffening rib, and the second support member 32 is a longitudinal stiffening rib. The stiffening rib thickness is 12mm, the circumferential stiffening rib spacing is 200mm–250mm, and the longitudinal stiffening rib spacing is 300–400mm. In other embodiments, other sizes of the first support member 31 and the second support member 32 can be selected according to the specific construction conditions. No restrictions are placed on the selection of the first support member 31 and the second support member 32 here.

[0038] In one optional embodiment, several sets of spring-type support assemblies can be installed inside the precast pipe fitting. Each assembly consists of a spring and a fixing member connected to both ends of the spring. One end of the fixing member is connected to the inner wall of the precast pipe fitting, and the other end is connected to a central stabilizing member via the spring. When the flue is subjected to external force, the spring can absorb and buffer some of the energy through its own elastic deformation, effectively reducing the impact of the external force on the precast pipe fitting, thereby improving the deformation resistance of the precast pipe fitting.

[0039] Furthermore, a branch flue 4 is provided on the main flue 2, and an outlet flue 1 is provided on the branch flue 4.

[0040] In simple terms, the flue gas from branch flue 4 can be discharged through its respective outlet flue 1, preventing blockage of the main flue 2 and improving exhaust efficiency. During maintenance, faults in branch or outlet flue 1 can be repaired independently without affecting the operation of the main flue 2, reducing maintenance costs and time.

[0041] Furthermore, there are multiple branch flues 4, which are spaced out.

[0042] Furthermore, branch flue 4 is a prefabricated pipe fitting.

[0043] Furthermore, the prefabricated pipe fittings are metal prefabricated pipe fittings, and the branch flue 4 and the outlet flue 1 are fixedly connected by welding.

[0044] It should be noted that in this embodiment, the prefabricated pipe fittings are made of Q345 galvanized material. Q345 galvanized material has good strength and toughness, capable of withstanding the high pressure inside the flue and the forces of complex external environments, ensuring the stability of the flue structure inside the mountain. Its galvanized layer significantly improves the corrosion resistance of the pipe fittings, effectively extending the service life of the flue in humid or corrosive gas environments.

[0045] It is easy to understand that the support structure 3 is also supported by Q345 galvanized material. Of course, in other embodiments, other metal materials can also be used to make the prefabricated pipes and support structure 3. For example, stainless steel can be used, which has extremely strong corrosion resistance and performs excellently in environments with high humidity and chemical corrosion risks, significantly improving the durability of the flue in such special environments. Here, no specific material selection is limited.

[0046] Furthermore, the axis of the branch flue 4 is set perpendicular to the axis of the main flue 2, and the axis of the outlet flue 1 is set perpendicular to the axis of the branch flue 4.

[0047] Specifically, the outer wall of branch flue 4 is embedded more than 100 mm into the main flue 2, and the outer wall of outlet flue 1 is embedded more than 100 mm into both branch flue 4 and main flue 2. The diameter of branch flue 4 is 3000 mm, and the diameter of outlet flue 1 is 2000 mm.

[0048] Furthermore, both the branch flue 4 and the outlet flue 1 consist of multiple pipe sections that are spliced ​​together in sequence.

[0049] Furthermore, the space between the borehole and the outlet flue 1 is filled with cement mortar 5.

[0050] It should be noted that after the cement mortar 5 hardens, it acts like an adhesive, tightly connecting the borehole wall and the outlet flue 1, fixing the outlet flue 1 within the mountain structure. This effectively prevents displacement or shaking caused by external forces, ensuring the long-term stable operation of the flue. From a sealing perspective, the cement mortar 5 fills the tiny gaps between the borehole and the flue, forming a tight sealing layer that prevents flue gas leakage, avoids pollution to the surrounding environment, and ensures the efficient operation of the flue system. Furthermore, the cement mortar 5 possesses good durability, resisting the effects of moisture erosion and temperature changes in the mountain environment. This slows down the aging and damage rate of the contact points between the flue and the borehole, extending the overall service life of the flue and reducing subsequent maintenance costs.

[0051] In practice, it is easy to understand that grouting holes and venting holes need to be made on the sidewalls of the precast pipes. The grouting holes are used to inject cement mortar (5), and their location and number are determined based on the precast pipes and drilling conditions. The venting holes allow air to escape during grouting, ensuring smooth grouting and dense filling. During construction, the precast pipes are first inserted into the drilled holes, and grouting begins after connecting the grouting equipment. The pressure and venting holes are monitored, and grouting is stopped when grout overflows from the venting holes. After grouting is completed, the two holes are sealed with pressure grouting using waterproof concrete to ensure the sealing and structural integrity of the precast pipes and guarantee the stable operation of the flue.

[0052] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A flue structure inside a mountain, characterized in that, include: The outlet flue (1) is a prefabricated pipe fitting, which is installed in a borehole on the surface of the mountain structure and connected to the main flue (2). One end of the prefabricated pipe fitting is exposed outside the mountain structure, and the other end is connected to the main flue (2) inside the mountain structure.

2. The internal flue structure of the mountain as described in claim 1, characterized in that, The precast pipe fitting is provided with a support structure (3) inside, which is suitable for improving the structural strength of the precast pipe fitting.

3. The internal flue structure of the mountain according to claim 2, characterized in that, The support structure (3) includes a first support member (31) and a plurality of second support members (32). The first support member (31) is coaxially arranged with the precast pipe and its inner diameter is smaller than that of the precast pipe. One end of the second support member (32) is connected to the outer wall of the first support member (31) and the other end is connected to the inner wall of the precast pipe. The plurality of second support members (32) are arranged at intervals along the circumference of the precast pipe.

4. The internal flue structure of the mountain according to any one of claims 1-3, characterized in that, The main flue (2) is also provided with a branch flue (4), and the branch flue (4) is provided with the outlet flue (1).

5. The internal flue structure of the mountain according to claim 4, characterized in that, The number of branch flues (4) is multiple, and they are spaced apart.

6. The internal flue structure of the mountain according to claim 5, characterized in that, The branch flue (4) is a prefabricated pipe fitting.

7. The internal flue structure of the mountain according to claim 6, characterized in that, The prefabricated pipe fittings are metal prefabricated pipe fittings, and the branch flue (4) and the outlet flue (1) are fixedly connected by welding.

8. The internal flue structure of the mountain according to any one of claims 5-7, characterized in that, The axial direction of the branch flue (4) is perpendicular to the axial direction of the main flue (2), and the axial direction of the outlet flue (1) is perpendicular to the axial direction of the branch flue (4).

9. The internal flue structure of the mountain according to any one of claims 5-7, characterized in that, Both the branch flue (4) and the outlet flue (1) consist of multiple pipe sections that are spliced ​​together in sequence.

10. The internal flue structure of the mountain according to any one of claims 1-3, characterized in that, The space between the borehole and the outlet flue (1) is filled with cement mortar (5).

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