Quick-mounting furnace cover structure

Abstract

The utility model discloses a quick -wearing type furnace cover structure, including furnace body, furnace cover, four wedge type blocks, locking piece, and two root compression link, the top of furnace body is provided with the opening portion, and the top vertical of furnace body is provided with two fixed link groups, wherein, same fixed link group includes two fixed links, and every fixed link group corresponds with a root compression link to make the both ends of compression link respectively joint to the C type inner chamber of same group two fixed links, compression link is used to after jointing to the C type inner chamber of same group two fixed links, and the cooperation wedge type block and limit pin carry out the down pressure to furnace cover to make furnace cover closely and the opening portion are attached, and limit pin is worn to the both left and right sides of fixed link C type inner chamber, locking piece is used to drive wedge type block and move to the position of another fixed link of same group, to cooperate limit pin and carry out the down pressure positioning to furnace cover, and after furnace cover down pressure to the preset depth, lock through the nut of locking piece and have preset and carry out the locking to fixed wedge type block's relative position.

Description

Technical Field

[0001] This utility model relates to the technical field of heating furnaces, and in particular to a quick-installation furnace cover structure. Background Technology

[0002] Traditional heating furnaces typically use an integral furnace body, which has good sealing performance and is easy to install. However, during subsequent maintenance, due to the small internal space of some parts of the furnace body, it is difficult for operators to enter and perform detailed maintenance on the furnace body. Therefore, most heating furnaces on the market currently use furnace covers.

[0003] In typical furnace cover installation, through-hole fixing holes are formed on both sides of the fixing rod (the height of the fixing holes determines whether the furnace cover is installed correctly). After pressing the furnace cover down to the preset depth, the pre-set fixing pins are inserted through the fixing holes to fix the clamping rod, thus securing the furnace cover. However, because the furnace cover is installed by its own weight, the clamping rod cannot be positioned below the fixing holes. To ensure the airtightness of the furnace body, a pressing device is generally needed to press the furnace cover down to ensure that the internal airtightness of the furnace body is within an excellent range. However, this method has the disadvantages of high installation cost and long installation time. Secondly, during later maintenance, the same pressing device is needed to press the furnace cover down to remove the fixing pins, resulting in high maintenance cost and long maintenance time.

[0004] Therefore, based on the above-mentioned technical problems, this application proposes a quick-installation furnace cover structure with low installation / maintenance costs and short installation / maintenance time. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a quick-installation furnace cover structure with low installation cost and short installation time.

[0006] To achieve the above objectives, this utility model provides a quick-installation furnace cover structure, including a furnace body with an opening at the top, a furnace cover, four wedge-shaped blocks, a locking element, a limiting pin, and two clamping rods. The furnace cover is used to install onto the opening to seal the furnace body. Two sets of horizontally spaced fixing rods are vertically arranged at the top of the furnace body. Each fixing rod set includes two fixing rods respectively positioned at the front and rear edges of the top of the opening, and the fixing rods are C-shaped. Each set of fixing rods corresponds to a clamping rod, such that both ends of the clamping rod are respectively engaged with the C-shaped cavities of the two fixing rods in the same set. The clamping rod, after being engaged with the C-shaped inner cavity of the two fixed rods in the same group, works with the wedge block and the limiting pin to press down the furnace cover, so that the furnace cover fits tightly against the opening. Each wedge block is placed on both ends of each clamping rod. The limiting pin, after the wedge block is placed on both ends of the clamping rod, passes through the left and right sides of the C-shaped inner cavity of the fixed rod. The locking member, after passing through the C-shaped inner cavity of the fixed rod, is connected to the wedge block. The locking member is used to drive the wedge block to move towards the position of the other fixed rod in the same group, so as to cooperate with the limiting pin to press down and position the furnace cover. After the furnace cover is pressed down to a preset depth, it is locked by the nut on the locking member to fix the relative position of the wedge block.

[0007] Furthermore, both the left and right sides of the opening and the left and right sides of the furnace cover are wedge-shaped structures.

[0008] Furthermore, the furnace cover includes a support base and several primary support members and several secondary support members disposed within the support base. The primary support members are arranged at intervals in the horizontal direction within the support base, and the secondary support members are arranged at intervals in the longitudinal direction within the support base. Both the primary and secondary support members are used to support the support base.

[0009] Furthermore, the clamping rod contacts the edges on the left and right sides of the support base, and at least two limiting members are formed on the top of each of the two opposite edges of the support base. The limiting members are used to restrict the clamping rod from shifting to the left and right sides of the furnace body.

[0010] Furthermore, the secondary support member is provided with several through holes, which are used to cooperate with a pre-set lifting device to lift the furnace cover.

[0011] Furthermore, a heat insulation layer is provided at the bottom of the support base. The heat insulation layer is preferably compressed heat insulation cotton made of aluminum silicate fiber, and the thickness of the heat insulation layer is 300mm.

[0012] Furthermore, several through first screw holes are formed on both the left and right sides of the furnace body, and several through second screw holes aligned with the first screw holes are formed on both the left and right sides of the furnace cover. The first screw holes are used to align with the second screw holes and cooperate with the preset positioning rod to fix the relative position of the heat insulation layer. At least one first alignment hole is formed on both the front and rear sides of the opening. At least one through second alignment hole aligned with the first alignment hole is formed on both the front and rear sides of the furnace cover.

[0013] Furthermore, a primary through hole is formed at the bottom of the C-shaped inner cavity of the fixing rod for the locking element to pass through, and secondary through holes are formed on the left and right sides of the fixing rod, which are coaxially arranged and for the limiting pin to pass through and be installed.

[0014] Furthermore, positioning holes are formed on both ends of the limiting pin. The positioning holes are used to cooperate with the pre-set positioning parts after the limiting pin is installed on the secondary through hole, so that the limiting pin is fixedly installed on the secondary through hole.

[0015] Furthermore, each of the fixing rods has an outwardly extending guide portion formed at its top end.

[0016] Furthermore, a support frame surrounding the edge of the opening is provided on the top of the furnace body. A U-shaped groove and a pressure rod are provided on the top of the support frame, wherein the pressure rod is located inside the groove of the U-shaped groove. The support frame is used to cooperate with the pressure rod as a support part to bear the force applied by the pressure rod. A material for heat insulation and sealing is placed between the inner wall of the U-shaped groove and the side of the pressure rod.

[0017] The present invention adopts the above-described solution, and its beneficial effects are as follows: The separate design of the furnace opening and the furnace cover provides operators with more space to maneuver, making it easier for them to inspect the bottom of the rollers, radiant tubes, and drive rollers, thereby improving maintenance efficiency. Furthermore, the combination of wedge blocks, limit pins, and locking components eliminates the need for additional pressing equipment to press down the furnace cover. The locking components drive the wedge blocks to move, causing the inclined surface of the wedge blocks to interact with the limit pins (i.e., changing the way the force is applied). This converts the displacement of the wedge blocks into downward pressure on the clamping rod, thus achieving the purpose of pressing down the clamping rod. This reduces installation and maintenance time, as well as installation and maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the quick-installation furnace cover structure in this embodiment.

[0019] Figure 2 This is a top view of the quick-installation furnace cover structure in this embodiment.

[0020] Figure 3 for Figure 2 A magnified schematic diagram of a portion of C in the image.

[0021] Figure 4 for Figure 2 A cross-sectional view at point AA. (Schematic diagram in this embodiment.)

[0022] Figure 5 for Figure 4 A magnified schematic diagram of a portion of E in the diagram.

[0023] Figure 6 A schematic diagram of the structure of a traditional furnace cover positioning and clamping rod.

[0024] Figure 7 for Figure 2 A cross-sectional view of section BB.

[0025] Figure 8 for Figure 7 A magnified schematic diagram of a portion of F in the image.

[0026] Figure 9 This is a schematic diagram of the furnace body in this embodiment.

[0027] Figure 10 for Figure 9 A magnified schematic diagram of a portion of the image.

[0028] Figure 11 This is a schematic diagram of the furnace cover in this embodiment.

[0029] Figure 12 This is a side view of the furnace cover in this embodiment.

[0030] Among them, 1-furnace body, 11-opening, 111-support platform, 112-first alignment hole, 12-fixing rod, 121-C-shaped inner cavity, 1211-primary through hole, 1212-secondary through hole, 122-guide part, 13-first screw hole, 2-furnace cover, 21-support base, 22-primary support component, 23-secondary support component, 231-perforation, 24-insulation layer, 25-second screw hole, 26-limiting component, 27-second alignment hole, 3-wedge block, 4-locking component, 5-limiting pin, 6-pressure rod, 7-support frame, 8-U-shaped groove, 9-pressure rod. Detailed Implementation

[0031] To facilitate understanding of this utility model, a more complete description of it is provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0032] See appendix Figure 1-12As shown, in this embodiment, a quick-installation furnace cover structure includes a furnace body 1 and a furnace cover 2. The top of the furnace body 1 has an opening 11, and the furnace cover 2 is installed onto the opening 11 to seal the furnace body 1. Both the left and right sides of the opening 11 and the left and right sides of the furnace cover 2 are wedge-shaped structures. Compared to the traditional fully enclosed furnace body 1 structure, the design of the opening 11 provides sufficient space for operators to inspect the interior of the furnace body 1 by opening the furnace cover 2 (as the rollers and radiant tubes inside the furnace body 1 may break or partially break during use). The material sheet is drawn into the bottom of the relevant transmission rollers, so it needs to be cleaned regularly to avoid long-term accumulation that may affect normal production. This can reduce the risk of damage to the heaters, rollers, radiant tubes, feeding structures or sensors inside the furnace body 1 by the operator in a relatively confined space, thereby relatively reducing the difficulty of inspection and maintenance and maintenance costs. Secondly, the left and right sides of the opening 11 correspond to the left and right sides of the furnace cover 2. The wedge-shaped structure design of the two further increases the contact area between the left and right ends of the opening 11 and the left and right ends of the furnace cover 2, making it easier to ensure the overall sealing.

[0033] In this embodiment, the furnace cover 2 includes a support base 21 and several primary support members 22 and several secondary support members 23 disposed within the support base 21. The primary support members 22 are arranged horizontally at intervals within the support base 21, and the secondary support members 23 are arranged longitudinally at intervals within the support base 21. That is, the primary support members 22 and the secondary support members 23 are perpendicular to each other, resulting in an overall (regular) grid pattern. (See attached diagram.) Figure 2 As shown; secondly, the aforementioned support base 21 is made of metal, and the bottom of the support base 21 is provided with a heat insulation layer 24 (the heat insulation layer 24 is preferably compressed heat insulation cotton made of aluminum silicate fiber, and its thickness is preferably 300mm; furthermore, the front and rear sides of the furnace cover 2 are wrapped with metal to prevent the left and right ends of the heat insulation layer 24 from being compressed when the furnace cover 2 is pressed down, causing some of the compressed heat insulation cotton to leak out from the front and rear ends of the furnace cover 2, resulting in a reduction in the heat insulation effect of the furnace cover 2; secondly, the primary support member 22 and the secondary support member 23 are both used to support the support base 21. When the overall size of the furnace cover 2 is too large, the primary support member 22 and the secondary support member 23 support the furnace cover 2, which can prevent the stress in some areas from being too concentrated when the furnace cover 2 is pressed down or lifted, thus preventing the furnace cover 2 from breaking or deforming, thereby achieving the characteristics of protecting the structural stability of the furnace cover 2 and reducing operating losses.

[0034] See appendix Figure 8 , 9As shown, several through-holes 13 are formed on both the left and right sides of the furnace body 1, and several through-holes 25 aligned with the first screw holes 13 are formed on both the left and right sides of the furnace cover 2. The first screw holes 13 are used to align with the second screw holes 25, and together with the pre-set positioning rods, fix the relative position of the heat insulation layer 24 (to prevent the heat insulation layer 24 from shifting due to other factors causing the furnace cover 2 to fail to be stably fixed, thus affecting the furnace body 1 to maintain a stable working temperature), so that the furnace cover 2 can be stably connected to the opening 11; in addition, see the attached... Figure 8 As shown, support platforms 111 for supporting the furnace cover 2 are provided at the bottom of the left and right sides of the opening 11.

[0035] See appendix Figure 9 , 11 As shown, at least one, preferably two, first alignment holes 112 are formed on both the front and rear sides of the opening 11, and at least one, preferably two, second alignment holes 27 are formed on both the front and rear sides of the furnace cover 2, which are through holes and aligned with the first alignment holes 112. By aligning the first alignment holes 112 with the second alignment holes 27, the operator can intuitively know the downward pressure of the furnace cover 2, which can relatively improve the installation efficiency.

[0036] See appendix Figure 3 As shown, the furnace cover 2 structure in this embodiment also includes four wedge-shaped blocks 3, locking elements 4, limiting pins 5, and two clamping rods 6. Two sets of fixing rod groups are vertically arranged at intervals along the horizontal direction on the top of the furnace body 1. Each fixing rod group includes two fixing rods 12 respectively arranged on the front and rear edges of the top of the opening 11, and the fixing rods 12 have a C-shaped structure. Each fixing rod 12 has an outwardly extending guide portion 122 formed on its top. By providing the guide portion 122, the time required for the clamping rod 6 to align with the C-shaped inner cavity 121 when it is engaged with the fixing rod 12 can be relatively reduced, achieving faster alignment. The purpose of this installation is to ensure that each set of fixing rods corresponds to a clamping rod 6, so that both ends of the clamping rod 6 are respectively engaged in the C-shaped inner cavity 121 of the two fixing rods 12 in the same set (the two fixing rods 12 in the same set are located in the same longitudinal position). By engaging the ends of the fixing rods 12 in the C-shaped inner cavity 121, the left and right sides of the C-shaped inner cavity 121 limit the clamping rod 6, preventing the clamping rod 6 from shifting and affecting the normal downward pressure of the furnace cover 2 (i.e., limiting the clamping rod 6 to move only in the vertical direction, to ensure the pressing effect of the subsequent wedge block 3 and the overall airtightness after pressing are within an excellent range). See the appendix for details. Figure 2-5 As shown.

[0037] Furthermore, a primary through hole 1211 for the locking element 4 is formed on the bottom of the C-shaped inner cavity 121 of the fixing rod 12, and secondary through holes 1212 are formed on the left and right sides of the fixing rod 12, which are coaxially arranged and for the limiting pin 5 to be installed. The pressing rod 6 is used to press down the furnace cover 2 in conjunction with the wedge block 3 and the limiting pin 5 after it is snapped into the C-shaped inner cavity 121 of the two fixing rods 12 in the same group, so that the furnace cover 2 fits tightly with the opening 11, so as to achieve a better sealing effect on the furnace body 1 and avoid the partial gap caused by the furnace cover 2 not being pressed down in place. This would allow heat in the furnace body 1 to escape from the gap during production, thereby reducing the heat treatment effect of the furnace body 1; or allow external impurities to seep into the furnace body 1 from the gap under the action of external factors such as vibration and wind, thereby causing unnecessary impact on the workpieces in the furnace body 1.

[0038] See appendix Figure 1 , 2 As shown in Figures 3, 5, and 10, in this embodiment, each wedge block 3 is placed on both ends of each clamping rod 6. After the wedge block 3 is placed on both ends of the clamping rod 6, the limiting pin 5 passes through the left and right sides of the C-shaped inner cavity 121 of the fixing rod 12. The locking member 4 is connected to the wedge block 3 after passing through the C-shaped inner cavity 121 of the fixing rod 12. The locking member 4 is used to drive the wedge block 3 to move towards the position of another fixing rod 12 in the same group, so as to cooperate with the limiting pin 5 to perform downward positioning of the furnace cover 2. After the furnace cover 2 is pressed down to the preset depth, it is locked by the nut preset on the locking member 4 to fix the relative position of the wedge block 3.

[0039] It should be noted that, see appendix Figure 6 As shown, in the traditional installation of the furnace cover 2, through-hole fixing holes are formed on both sides of the fixing rod 12 (the height of the fixing holes determines whether the furnace cover 2 is installed in place). After the furnace cover 2 is pressed down to the preset depth (so that the top of the clamping rod 6 is below the fixing hole), the preset fixing pin is inserted through the fixing hole to fix the clamping rod 6, thereby fixing the furnace cover 2. However, because the furnace cover 2 cannot be installed by its own weight, the clamping rod 6 cannot be positioned below the fixing hole. Generally, a pressing device is needed to press down the furnace cover 2, which has the disadvantages of high installation cost and long installation time. Secondly, during later maintenance, a pressing device is also needed to press down the furnace cover 2 to remove the fixing pin, which has the disadvantages of high maintenance cost and long maintenance time.

[0040] In the furnace cover 2 structure of this embodiment, after the clamping rod 6 is snapped into the C-shaped inner cavity 121, each wedge block 3 is placed on the end of the clamping rod 6, and then the limiting pin 5 is inserted through the two left and right sides of the C-shaped inner cavity 121 of the fixing rod 12 (at this time, the vertical height of the limiting pin 5 corresponds to the low position of the inclined surface of the wedge block 3); the locking member 4 passes through the first-stage through hole 1211 and connects to the vertical end of the wedge block 3, and then the locking member 4 drives the wedge block 3 to move towards the position of another fixing rod 12 in the same group. The relationship between the limiting pin 5 and the wedge block 3 is as follows: the limiting pin 5 contacts the wedge block 3 from the low position of the inclined surface of the wedge block 3, and then contacts the high position of the inclined surface of the wedge block 3 (the wedge block 3 changes the direction of the force). The moving force provided by the locking element 4 is converted into downward pressure on the clamping rod 6. As the pin wedge moves, the relative vertical height of the clamping rod 6 also decreases synchronously, thereby achieving the downward pressure operation on the furnace cover 2. Compared with the traditional downward pressure method, this reduces installation and maintenance costs and shortens the corresponding installation and maintenance time, thereby improving production efficiency and productivity (achieving quick installation). After the second screw holes 25 on the left and right sides of the furnace cover 2 are aligned with the first screw holes 13 on the left and right sides of the furnace body 1, the furnace cover 2 (with the heat insulation layer 24) is further fixed by the pre-set positioning rod, so that the furnace cover 2 is stably installed on the opening 11 of the furnace body 1, ensuring that the overall airtightness is within an excellent range and relatively reducing the load on the two clamping rods 6. See Appendix. Figure 5 , 11 As shown.

[0041] See appendix Figure 7 , 8 As shown, furthermore, a support frame 7 is provided on the top of the furnace body 1, surrounding the edge of the opening 11. A U-shaped groove 8 and a pressure rod 9 are provided on the top of the support frame 7. The pressure rod 9 is located within the groove of the U-shaped groove 8 (the width of the U-shaped groove 8 is greater than the width of the pressure rod 9). A heat-insulating and sealing material (such as quartz stone or heat-insulating cotton) is placed between the inner wall of the U-shaped groove 8 and the side of the pressure rod 9. This prevents heat from escaping from the gap between the furnace cover 2 and the opening 11 during furnace operation, ensuring the heat insulation of the furnace body 1. The heat can be maintained at a preset level, which reduces the operating cost of the furnace body 1. The support frame 7 is used to cooperate with the pressure rod 9 as a support part to bear the force applied by the clamping rod 6. When the clamping rod 6 is under continuous force and the furnace cover 2 is pressed down, the bottom edge of the top of the support seat 21 gradually comes into contact with the top surface of the pressure rod 9. At this time, the pressure rod 9 and the support frame 7 support the top edge of the support seat 21, which can prevent the top edge of the support seat 21 from deforming or breaking after bearing too much pressure, thereby reducing the installation cost (avoiding the replacement of parts).

[0042] In this embodiment, the clamping rod 6 contacts the front and rear edges of the support base 21. At least two, preferably three, limiting members 26 are formed on each of the left and right edges of the support base 21. The limiting members 26 are used to restrict the clamping rod 6 from shifting to the left and right sides of the furnace body 1, so that the clamping rod 6 can act on the front and rear edges of the support base 21, ensuring that the furnace cover 2 is stably stressed and further pressed down.

[0043] See appendix Figure 10 As shown, the secondary support 23 is further provided with several through holes 231. The through holes 231 are used to cooperate with the pre-set lifting equipment to lift the furnace cover 2. The operator can select the through holes 231 to be used according to the actual situation and connect the through holes 231 to the lifting equipment to lift the furnace cover 2, so that the operator can inspect and maintain the inside of the furnace body 1, thereby reducing the maintenance time.

[0044] Furthermore, positioning holes are formed on both ends of the limiting pin 5. The positioning holes are used to fix the limiting pin 5 on the secondary through hole 1212 after the limiting pin 5 is installed through the secondary through hole 1212, in conjunction with the pre-set positioning parts, so as to prevent the limiting pin 5 from falling off the secondary through hole 1212 when it is subjected to the pressure of the wedge block 3, so as to ensure that the pressing rod 6 continuously achieves the pressing effect on the furnace cover 2.

[0045] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model in any way. Any modifications or variations made by those skilled in the art, without departing from the scope of this utility model's technical solution, using the disclosed technical content, are equivalent embodiments of this utility model. Therefore, all equivalent changes made based on the concept of this utility model without departing from its technical solution should be covered within the protection scope of this utility model.

Claims

1. A quick-installation furnace cover structure, comprising a furnace body (1), wherein the top of the furnace body (1) is provided with an opening (11), characterized in that: It also includes a furnace cover (2), four wedge blocks (3), a locking element (4), a limiting pin (5), and two clamping rods (6). The furnace cover (2) is used to install onto the opening (11) to seal the furnace body (1). The top of the furnace body (1) is vertically provided with two sets of fixing rods arranged at intervals along the horizontal direction. Each fixing rod set includes two fixing rods (12) respectively arranged on the front and rear edges of the top of the opening (11), and the fixing rods (12) are C-shaped. Each set of fixing rods corresponds to a clamping rod (6) so that the two ends of the clamping rod (6) are respectively engaged in the C-shaped inner cavity (121) of the two fixing rods (12) in the same set. The clamping rod (6) is used to cooperate with the wedge block (3) and the clamping rod (6) after being engaged in the C-shaped inner cavity (121) of the two fixing rods (12) in the same set. The limiting pin (5) presses down on the furnace cover (2) so that the furnace cover (2) fits tightly against the opening (11); each of the wedge blocks (3) is placed on both ends of each pressing rod (6), and the limiting pin (5) passes through the left and right sides of the C-shaped inner cavity (121) of the fixing rod (12) after the wedge blocks (3) are placed on both ends of the pressing rod (6); the locking member (4) is connected to the wedge block (3) after passing through the C-shaped inner cavity (121) of the fixing rod (12), and the locking member (4) is used to drive the wedge block (3) to move toward the position of another fixing rod (12) in the same group, so as to cooperate with the limiting pin (5) to press down and position the furnace cover (2), and after the furnace cover (2) is pressed down to the preset depth, it is locked by the nut preset on the locking member (4) to fix the relative position of the wedge block (3).

2. The quick-installation furnace cover structure according to claim 1, characterized in that: The left and right sides of the opening (11) and the left and right sides of the furnace cover (2) are both wedge-shaped structures.

3. The quick-installation furnace cover structure according to claim 1, characterized in that: The furnace cover (2) includes a support base (21) and several primary support members (22) and several secondary support members (23) disposed in the support base (21). The primary support members (22) are arranged at intervals in the support base (21) in the horizontal direction, and the secondary support members (23) are arranged at intervals in the support base (21) in the longitudinal direction. Both the primary support members (22) and the secondary support members (23) are used to support the support base (21).

4. The quick-installation furnace cover structure according to claim 3, characterized in that: The clamping rod (6) contacts the left and right edges of the support base (21). At least two limiting members (26) are formed on the top of each of the two opposite edges of the support base (21). The limiting members (26) are used to restrict the clamping rod (6) from shifting to the left and right sides of the furnace body (1).

5. The quick-installation furnace cover structure according to claim 3, characterized in that: The secondary support (23) is provided with several perforations (231), which are used to cooperate with the pre-set lifting equipment to lift the furnace cover (2); the bottom of the support base (21) is provided with a heat insulation layer (24), which is a compressed heat insulation cotton made of aluminum silicate fiber, and the thickness of the heat insulation layer (24) is 300mm.

6. The quick-installation furnace cover structure according to claim 5, characterized in that: The furnace body (1) has several through first screw holes (13) formed on both the left and right sides. The furnace cover (2) has several through second screw holes (25) formed on both the left and right sides, which are aligned with the first screw holes (13). The first screw holes (13) are aligned with the second screw holes (25) and are used to fix the relative position of the heat insulation layer (24) with the pre-set positioning rod. The opening (11) has at least one first alignment hole (112) formed on both the front and rear sides. The furnace cover (2) has at least one through second alignment hole (27) formed on both the front and rear sides, which is aligned with the first alignment hole (112).

7. The quick-installation furnace cover structure according to claim 1, characterized in that: The bottom of the C-shaped inner cavity (121) of the fixing rod (12) is formed with a primary through hole (1211) for the locking element (4) to pass through, and the left and right sides of the fixing rod (12) are formed with secondary through holes (1212) that are coaxially arranged and for the limiting pin (5) to pass through.

8. The quick-installation furnace cover structure according to claim 1, characterized in that: The limiting pin (5) has positioning holes formed on both ends. The positioning holes are used to fix the limiting pin (5) on the secondary through hole (1212) after the limiting pin (5) is installed through the secondary through hole (1212).

9. The quick-installation furnace cover structure according to claim 1, characterized in that: Each of the aforementioned fixing rods (12) has an outwardly extending guide portion (122) formed on its top end.

10. The quick-installation furnace cover structure according to claim 1, characterized in that: The furnace body (1) is provided with a support frame (7) around the edge of the opening (11) at the top. The support frame (7) is provided with a U-shaped groove (8) and a pressure rod (9) at the top. The pressure rod (9) is located in the groove of the U-shaped groove (8). The support frame (7) is used to cooperate with the pressure rod (9) as a support part to bear the force applied by the clamping rod (6). A material for heat insulation and sealing is placed between the inner wall of the U-shaped groove (8) and the side of the pressure rod (9).

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