An anchor pin to prevent end heat buildup

Abstract

This utility model relates to the field of heating furnace technology, specifically to an anchoring nail for preventing end heat accumulation. It includes a metal nail body and an insulating cap fixed to the end of the nail body. The insulating cap includes a cover plate and a first and a second insulating pad that together cover the cover plate. The first insulating pad is installed on the rear side of the cover plate, and the second insulating pad is installed on the front side of the cover plate. The second insulating pad and / or the second insulating pad extends to cover the periphery of the cover plate. The nail body passes through the first insulating pad and is detachably connected to the cover plate. The cover plate has a locking structure for fixing the second insulating pad. Compared with the prior art, this design ensures that all lining layers are firmly fixed, and the end of the metal nail body is isolated from the flue gas by the insulating cap, blocking the heat transfer path and improving the thermal efficiency of the heating furnace.

Description

Technical Field

[0001] This utility model relates to the field of heating furnace technology, and specifically to an anchoring nail to prevent heat accumulation at the end. Background Technology

[0002] To improve thermal efficiency, heating furnaces typically employ insulation structures, which are generally composed of individual or combined refractory materials such as ceramic fiber blankets, ceramic fiber boards, nanoboards, castables, refractory bricks, and ceramic fiber modules. Low-temperature structures generally require only castables, while medium- and high-temperature structures typically consist of a combination of multiple materials. Lightweight yet high-temperature structures are made from individual folded ceramic fiber blankets. Ceramic fiber blankets are generally secured using straight-line anchors.

[0003] Chinese patent document CN219037604U discloses a composite lining for a furnace cover and a kiln. The composite lining includes an insulation layer, a fiber layer, and fiber modules. The insulation layer is laid on the inner wall of the furnace cover, the fiber layer is laid on the side of the insulation layer away from the furnace cover, and the fiber modules are laid on the side of the fiber layer away from the furnace cover. The thermal conductivity of the insulation layer is lower than that of the fiber layer and the fiber modules. The fiber modules and fiber layer have good sealing and high-temperature resistance, and their thermal conductivity is lower than that of traditional castable materials, thus reducing heat loss. The insulation layer's thermal conductivity is lower than that of the fiber layer and the fiber modules, effectively blocking heat conduction. The composite lining for the furnace cover provides good insulation, reduces heat loss, and increases the service life of the furnace cover.

[0004] Chinese patent document CN204478827U discloses a lining structure for a chemical heating furnace used in nail making. It relates to a heating furnace lining, comprising a wall panel anti-corrosion coating, a backing blanket, gas-barrier steel foil, ceramic fiber modules, and a fiber-cured coating. The heating furnace wall panel is arranged sequentially from the outside inwards with the wall panel anti-corrosion coating, backing blanket, gas-barrier steel foil, ceramic fiber modules, and fiber-cured coating. The backing blanket, gas-barrier steel foil, and ceramic fiber modules are fixed by anchor nails. This provides strong corrosion resistance, significantly improving the heating furnace's working efficiency and extending its service life.

[0005] In the existing technology, the anchoring nails are inserted into the rear part of the fiber module (ceramic fiber module) (the side closest to the furnace wall). During installation, the anchoring nails are used to fix the other layers of the fiber module except for the first layer (the one furthest from the furnace wall). Then, the fiber module is used to cover the end of the anchoring nail. As a result, the outermost fiber module has weak stability and is not resistant to erosion.

[0006] Insulation structures such as fiber modules and ceramic fiber modules are categorized as lining layers. Later, the inventors developed... Figure 1In the structure shown, to securely fix the first lining layer 02, a metal clip 03 is inserted into the anchor pin 01 after each lining layer 02 is laid, tightening the already laid lining layer 02 until the first lining layer 02 is laid and secured with the clip 03. This ensures that each lining layer 02 is securely fixed. However, the metal clip 03 and the ends of the anchor pins 01 are directly exposed to the flue gas inside the heating furnace. The good thermal conductivity of metal will cause the clip 03 to form regular hot spots in the temperature field, reducing the thermal efficiency of the heating furnace. Summary of the Invention

[0007] In view of the above-mentioned technical problems, the present invention provides an anchor nail that prevents heat accumulation at the end.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] An anchoring nail for preventing end heat accumulation is provided, comprising a nail body made of metal and an insulating cap fixed to the end of the nail body. The insulating cap includes a cover plate and a first insulating pad and a second insulating pad that together wrap around the cover plate. The first insulating pad is installed on the rear side of the cover plate, and the second insulating pad is installed on the front side of the cover plate. The second insulating pad and / or the second insulating pad extends to wrap around the periphery of the cover plate. The nail body passes through the first insulating pad and is detachably connected to the cover plate. The cover plate is provided with a locking structure for fixing the second insulating pad.

[0010] Specifically, the cover plate includes a plate body and a side plate extending forward from the side of the plate body, and the second insulation pad is partially embedded in the space between the two side plates; the locking structure includes a pin mounted between the two side plates, the pin penetrating the second insulation pad, thereby fixing the second insulation pad to the cover plate.

[0011] Specifically, the two ends of the pin are connected to two opposing side plates. One side plate has a countersunk hole, and the other side plate has a screw hole. The pin is a bolt. The bolt passes through the countersunk hole and the second insulation pad and then engages with the screw hole to lock it in place.

[0012] Specifically, the first insulation pad has a semi-enclosed structure, covering the rear side of the main body and a portion of the outer side of the side plate, and the first insulation pad covers the countersunk hole position of the side plate; the second insulation pad extends partially to the outer side of the side plate and abuts against the first insulation pad.

[0013] Specifically, a high-temperature resistant adhesive is applied between the cover plate and the first insulation pad, and / or between the cover plate and the second insulation pad.

[0014] Specifically, the cover plate has raised or recessed areas on its surface to increase the area covered by the high-temperature adhesive coating.

[0015] Specifically, the nail body and the cover plate are connected by threads, and the rear center of the plate body is provided with a threaded hole for the nail body.

[0016] Specifically, a stud is fixed to the rear side of the cover plate, and a nut is provided at the end of the nail body. The stud is screwed into the nut, thereby fixing the cover plate and the nail body together.

[0017] Specifically, one of the cover plate and the nail body is provided with an insertion tube, and the other is provided with a pin section. The insertion tube has multiple positioning holes along its own length direction, and multiple elastic positioning clips are provided on the outside of the pin section at an angle. The positioning clips are inserted into the positioning holes to fix the insertion tube and the pin section.

[0018] Specifically, the insertion tube has a long strip-shaped retraction groove arranged along its own length at the position offset from the positioning hole, so that when the pin section is rotated, the positioning card can disengage from the positioning hole and embed into the retraction groove.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides an anchoring nail for preventing end heat accumulation. Compared with the prior art, it ensures that all lining layers are firmly fixed, and the ends of the metal nail body are isolated from the flue gas by heat-insulating caps, blocking the heat transfer path and improving the thermal efficiency of the heating furnace. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0022] Figure 1 This is a schematic diagram illustrating the combination of lining and anchor bolts in existing technology.

[0023] Figure 2 This is a schematic diagram of the structure of an anchor nail for preventing heat buildup at the end, as shown in the embodiment.

[0024] Figure 3 This is a schematic diagram showing the usage state of the anchoring nails after they are applied to the lining layer in the embodiment.

[0025] Figure 4 This is a partially enlarged view of an anchor bolt for preventing end heat buildup in an embodiment.

[0026] Figure 5 for Figure 4 The view with section AA in the middle mainly shows the cross arrangement of different pins.

[0027] Figure 6 This is a schematic diagram illustrating the second method of connecting the nail body and the heat-insulating cap in the embodiment.

[0028] Figure 7 This is a schematic diagram illustrating the third connection method between the nail body and the heat insulation cap in the embodiment.

[0029] Figure 8 for Figure 7 A magnified view of a portion of the image.

[0030] Figure 9 This is a schematic diagram illustrating the fourth connection method between the nail body and the heat insulation cap in the embodiment.

[0031] Figure label:

[0032] Nail body 1, threaded section 11, nut 12;

[0033] 2. Insulating cap, 21. Cover plate, 211. Plate body, 212. Side plate, 212. Countersunk hole, 2121. Stud, 22. First insulating pad, 23. Second insulating pad, 24. Pin, 25. High temperature resistant adhesive, 26. Protrusion, 27.

[0034] Card 3;

[0035] Insertion tube 4, positioning hole 41, retraction groove 42;

[0036] Pin section 5, positioning card 51;

[0037] Lining layer 6. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] This embodiment provides an anchoring nail to prevent end heat buildup, such as... Figures 2 to 5 As shown, the device includes a metal nail body 1 and an insulating cap 2 fixed to the end of the nail body 1. The nail body 1 is a straight nail. The insulating cap 2 includes a cover plate 21, a first insulating pad 23, and a second insulating pad 24. The first insulating pad 23 and the second insulating pad 24 together cover the cover plate 21. The first insulating pad 23 is installed on the rear side of the cover plate 21, and the second insulating pad 24 is installed on the front side of the cover plate 21. The second insulating pad 24 extends and covers the periphery of the cover plate 21. The nail body 1 passes through the first insulating pad 23 and is detachably connected to the cover plate 21. The cover plate 21 is provided with a locking structure to fix the second insulating pad 24.

[0040] In actual use, the rear end of the nail body 1 is welded and fixed to the inner wall of the furnace. Then, for each layer of lining 6 laid, a clip 3 is inserted into the nail body 1 to position the laid lining 6. After the last layer of lining 6 is laid, the cover plate 21 of the heat insulation cap 2 is fixed to the nail body 1, so that the first heat insulation pad 23 of the heat insulation cap 2 presses the lining 6 backward, thus fixing the multiple layers of lining 6.

[0041] It should be noted that the lining layer 6 can be made of ceramic fiber blanket (ceramic fiber blanket). The clip 3 adopts existing technology and is intended to press down the laid lining layer 6. Of course, in practice, one clip 3 can be installed only after every two or more lining layers 6, or the clip 3 can be omitted as needed.

[0042] In this embodiment, the cover plate 21 includes a plate body 211 and a side plate 212 extending forward from the side of the plate body 211. The plate body 211 and the side plate 212 are an integrated structure. The plate body 211 is fixed perpendicularly to the nail body 1. The second insulation pad 24 is partially embedded in the space between the two side plates 212. The locking structure includes a pin 25 mounted between the two side plates 212. The pin 25 passes through the embedded part of the second insulation pad 24, thereby fixing the second insulation pad 24 to the cover plate 21. Specifically, the two ends of the pin 25 are respectively connected to the two opposing side plates 212. One side plate 212 has a countersunk hole 2121, and the other side plate 212 has a screw hole. The pin 25 is a bolt. The bolt passes through the countersunk hole 2121 and the second insulation pad 24 and then engages with the screw hole to lock it in place. The head of the bolt is embedded in the countersunk hole 2121. Of course, the two side plates 212 corresponding to the two ends of the pin 25 do not have to face each other; they can also be adjacent, as long as the second insulation pad 24 can be inserted to fix it. Alternatively, the pin 25 can be replaced with a cross-through structure made of iron wire, steel wire, etc. Figure 5 As shown, the pins 25 of each group (aligned) side plate 212 should be staggered in the height direction and arranged in a cross manner to avoid interference between the pins 25 corresponding to different side plates 212.

[0043] Specifically, the first insulation pad 23 has a semi-enclosed structure, covering the rear side of the main body 211 and a portion of the outer side of the side plate 212. The first insulation pad 23 also covers the countersunk hole 2121 of the side plate 212, allowing it to be installed after the second insulation pad 24 is installed. The second insulation pad 24 extends partially to the outer side of the side plate 212, abutting against the first insulation pad 23 and completely enclosing the outer perimeter of the cover plate 21. The first insulation pad 23 is made of compressible, high-temperature resistant insulation material, preferably ceramic fiber. Preferably, the second insulation pad 24 is made of a malleable insulation material, preferably ceramic fiberboard or nanoboard, with a through hole in the center through which the pin 25 can pass. In use, the second insulation pad 24 is first assembled into the cover plate 21, and then the required pin 25 is inserted into the side plate 212 to complete the assembly of the insulation cap 2.

[0044] Specifically, a high-temperature resistant adhesive 26 is applied between the cover plate 21 and the first insulation pad 23, and / or between the cover plate 21 and the second insulation pad 24. This further reduces the gap between the first and second insulation pads 23 and the cover plate 24, improving the insulation effect and erosion resistance. Specifically, the cover plate 21 has protrusions 27 integrally formed or welded on its outer surface to increase the application area of ​​the high-temperature resistant adhesive 26, thereby improving the adhesion effect of the adhesive 26. In practice, the protrusions 27 can be replaced with recesses.

[0045] There are several embodiments regarding the connection method between the nail body 1 and the cover plate 21:

[0046] The first connection method is as follows: Figures 2 to 3 As shown, the front end of the nail body 1 has a threaded section 11, which is integrally formed or welded. The rear middle of the plate body 211 is provided with a threaded hole that fits the nail body 1, and the nail body 1 and the plate body 211 are threadedly connected.

[0047] The second connection method is as follows: Figure 6 As shown, a stud 22 is fixed to the rear side of the cover plate 21, and a nut 12 is welded to the end of the nail body 1. The stud 22 is screwed into the nut 12, thereby fixing the cover plate 21 to the nail body 1.

[0048] The third method is as follows Figure 7 and Figure 8 As shown, the cover plate 21 is fixed with an insertion tube 4. The cross-section of the insertion tube 4 can be rectangular, elliptical, circular, or rectangular with rounded corners. The insertion tube 4 has multiple positioning holes 41 along its length. The edge of the positioning hole 41 aligned with the insertion forward direction is set as a bevel, and the edge aligned with the backward direction can be set as a reverse bevel. The front section of the nail body 1 is a pin section 5. One end of the pin section 5 is set as a triangular shape with a reduced diameter (arrow-shaped, conical, or square pyramidal). Multiple elastic positioning clips 51 are arranged at an angle on the outside of the pin section 5. The orientation of the positioning clips 51 is aligned with the insertion direction. In use, the positioning clips 51 move forward with the pin section 5. When retracting, the positioning clips 51 insert into the adjacent positioning hole 41, and locking is achieved by adjustment, thus fixing the insertion tube 4 and the pin section 5.

[0049] A retraction groove 42 is added to the insertion tube 4. The retraction groove 42 is elongated and runs through the insertion tube 4. The number and angle of the retraction grooves 42 on the same cross section correspond one-to-one with the positioning clips 51. When disassembly is required, first push the pin section 5 forward. After the positioning clip 51 leaves the positioning hole 41, rotate the pin section 5 and the insertion tube 4 relative to each other, so that the positioning clip 51 enters the retraction groove 42. At this time, a tool can be used to press the positioning clip 51 to deform it, temporarily losing some of its elasticity, so that the pin section 5 can be removed from the insertion tube 4. When reinstallation is required, the positioning clip 51 can be bent to restore its sufficient elasticity.

[0050] The fourth connection method is as follows: Figure 9 As shown, this is a variation of the third method, except that the positions of the insertion tube 4 and the pin section 5 are interchanged. The pin section 5 is permanently connected and fixed to the cover plate 21, while the insertion tube 4 is permanently connected to the nail body 1. During construction, the insertion tube 4 is pre-embedded in the lining layer 6. When installing the pin section 5, there is no need to remove the lining layer 6; the pin section 5 can be directly inserted, greatly improving construction efficiency.

[0051] Compared with existing technologies, isolating the metal parts (the front end of the nail body 1 and the cover plate 21) from the flue gas with insulation material blocks the heat transfer path and improves the thermal efficiency of the heating furnace. Thanks to the compact structure of the insulation cap 2, the erosion resistance is improved, preventing the insulation structure of the insulation cap 2 from falling off under the erosion of high-temperature flue gas.

[0052] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0053] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0054] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0055] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. An anchor nail for preventing end heat accumulation, characterized by: The device includes a metal nail body and an insulating cap fixed to the end of the nail body. The insulating cap includes a cover plate and a first insulating pad and a second insulating pad that together wrap around the cover plate. The first insulating pad is installed on the rear side of the cover plate, and the second insulating pad is installed on the front side of the cover plate. The second insulating pad and / or the second insulating pad extends to wrap around the periphery of the cover plate. The nail body passes through the first insulating pad and is detachably connected to the cover plate. The cover plate is provided with a locking structure to fix the second insulating pad.

2. The heat-accumulation-preventing anchor nail according to claim 1, wherein: The cover plate includes a plate body and a side plate extending forward from the side of the plate body. The second insulation pad is partially embedded in the space between the two side plates. The locking structure includes a pin mounted between the two side plates, which passes through the second insulation pad to fix the second insulation pad to the cover plate.

3. The heat buildup preventing anchor nail according to claim 2, wherein: The two ends of the pin are connected to two opposing side plates. One side plate has a countersunk hole, and the other side plate has a screw hole. The pin is a bolt. The bolt passes through the countersunk hole and the second insulation pad and then engages with the screw hole to lock it in place.

4. The anchoring nail for preventing end heat accumulation according to claim 3, characterized in that: The first insulation pad has a semi-enclosed structure, covering the rear side of the main body and a portion of the outer side of the side plate, and the first insulation pad covers the countersunk hole position of the side plate; the second insulation pad extends partially to the outer side of the side plate and abuts against the first insulation pad.

5. An anchor bolt for preventing end heat accumulation according to claim 1, characterized in that: A high-temperature resistant adhesive is applied between the cover plate and the first insulation pad, and / or between the cover plate and the second insulation pad.

6. The heat buildup preventing anchor of claim 5, wherein: The cover plate has raised or recessed areas to increase the area covered by the high-temperature adhesive coating.

7. The heat buildup preventing anchor of claim 1, wherein: The nail body and the cover plate are connected by threads, and the rear center of the plate body is provided with a threaded hole for the nail body.

8. The heat buildup preventing anchor of claim 1, wherein: A stud is fixed to the rear side of the cover plate, and a nut is provided at the end of the nail body. The stud is screwed into the nut, thereby fixing the cover plate and the nail body together.

9. The heat buildup preventing anchor of claim 1, wherein: One of the cover plate and the nail body is provided with an insertion tube, and the other is provided with a pin section. The insertion tube has multiple positioning holes along its own length direction, and multiple elastic positioning clips are provided on the outside of the pin section at an angle. The positioning clips are inserted into the positioning holes to fix the insertion tube and the pin section.

10. The heat buildup preventing anchor of claim 9, wherein: The insertion tube has a long strip-shaped retraction groove arranged along its own length at the position offset from the positioning hole, so that when the pin section is rotated, the positioning card can disengage from the positioning hole and be inserted into the retraction groove.

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