Manual anti-falling device for furnace door

Abstract

The utility model discloses a manual anti-falling device for a furnace door, and relates to the related technical field of heating furnaces. The furnace door comprises a furnace door body, movable sleeves, an installation plate and a limiting assembly, a fixed plate is fixed to the front side of the furnace door body, limiting strips are symmetrically fixed to the front side of the fixed plate along the center line parallel to the long edge, a supporting plate is fixed to the top of the limiting strip located below, and the movable sleeves are arranged on the two sides of the furnace door body. A mounting plate is arranged behind each movable sleeve, limiting assemblies are movably connected into the two movable sleeves in a penetrating mode, guide rods are inserted into the ends, close to the furnace door body, of the movable sleeves in a penetrating mode, and the ends, extending out of the movable sleeves, of the guide rods are arranged between the top of the supporting plate and the limiting strips located above. By arranging the furnace door main body, the movable sleeve, the mounting plate and the limiting assembly, the problems that after the furnace door of the heating furnace is opened through a lifting structure, the furnace door is prone to falling after the lifting structure breaks down, and the furnace door is not convenient to limit in place after being lifted are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to heating furnaces, and particularly relates to a manual anti-falling device for furnace doors. Background Art

[0002] A heating furnace is a common industrial equipment used to heat materials or workpieces by burning fuel or generating heat through electricity. The working principle is usually to use the high-temperature flame and flue gas generated by the combustion of fuel in the furnace as the heat source, and transfer heat to the medium flowing in the furnace tube by radiation and convection to make it reach the required process temperature. The structure of a heating furnace generally includes a radiation chamber, a convection chamber, a waste heat recovery system, a burner and a ventilation system. When the heating furnace is working, the furnace door is lowered and closed. When feeding or discharging is required, the furnace door is opened for feeding and discharging. However, it still has the following disadvantages in actual use:

[0003] 1. When the door of the heating furnace is opened and materials are loaded and unloaded, it is lifted directly through the lifting structure of the door. When the lifting structure fails due to a fault, it is easy to cause the door to fall, causing safety hazards and affecting the safe use of the heating furnace;

[0004] 2. When the door of the heating furnace is opened and the falling prevention structure is working, the position of the door is directly limited by the limiting structure. However, after the position of the door is limited, the operator can only determine whether the door is in place by touching the limiting structure by hand. The accuracy of the determination is not high enough, and it is not convenient to determine whether the door is in place. Utility Model Content

[0005] The purpose of the utility model is to provide a manual anti-falling device for furnace door. By arranging a furnace door main body, a movable sleeve, a mounting plate and a limit assembly, the utility model solves the problem that after the furnace door of the heating furnace is opened by the lifting structure, the furnace door is easily caused to fall due to failure of the lifting structure, and it is not convenient to determine that the furnace door is in the limit position after the furnace door is lifted.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a manual anti-falling device for furnace door, comprising a furnace door body, a movable sleeve, a mounting plate and a limit assembly, wherein a fixing plate is fixed on the front side of the furnace door body, and a limit strip is symmetrically fixed on the front side of the fixing plate along a center line parallel to the long side, and a support plate is fixed on the top of the limit strip below. Movable sleeves are arranged on both sides of the furnace door body, and a mounting plate is arranged at the rear of each of the movable sleeves. The two movable sleeves are both movably connected with the limit assembly, and the limit assembly comprises a guide rod, which is inserted through the movable sleeve at one end close to the furnace door body, and the end of the guide rod extending out of the movable sleeve is arranged between the top of the support plate and the limit strip above. When working, the furnace mouth of the heating furnace is closed by the furnace door body, the limit assembly is movably connected therein by the movable sleeve, and the guide rod is inserted through the movable sleeve and enters between the support plate and the limit strip above, so that the height of the furnace door body is well limited.

[0008] Furthermore, two photoelectric switches are fixed on the front side of the fixed plate, and the photoelectric switches are arranged directly behind the two guide rods between the top of the support plate and the limiting strip located above. A warning light is fixed on the front side of the furnace door body below the fixed plate. After the two photoelectric switches are completely blocked by the guide rods, the warning light turns on to confirm that the furnace door is restricted.

[0009] Furthermore, a movable opening is provided at one end of the movable sleeve close to the furnace door body, the guide rod is inserted into the movable opening, and the movable sleeve is movably connected to the guide rod through the movable opening.

[0010] Furthermore, the limit assembly also includes a pushing frame, a connecting rod and a limit plate. The limit plate is fixed to the end of the guide rod away from the furnace door body, the connecting rod is fixed to the end of the limit plate away from the guide rod, and the pushing frame is fixed to the end of the connecting rod away from the limit plate. The limit assembly pushes the connecting rod through the pushing frame to drive the limit plate to move.

[0011] Furthermore, an inner cavity is opened in the movable sleeve, the inner diameter of the inner cavity is equal to the diameter of the limiting disk and is connected to the movable port, the limiting disk is movably connected in the inner cavity, the connecting rod is inserted into the end of the movable sleeve away from the furnace door body, and the movable sleeve movably connects the limiting disk therein through the inner cavity.

[0012] Furthermore, ear plates are fixed at the edges of the two vertical sides on the front side of the mounting plate, and fixing openings are opened in the two ear plates corresponding to the positions of the movable sleeves. The movable sleeve is fixed in the fixing openings, and the mounting plate fixes the movable sleeve through the fixing openings on the ear plates.

[0013] The utility model has the following beneficial effects:

[0014] The present invention solves the problem that the furnace door of the heating furnace may fall easily after the lifting structure fails after the furnace door of the heating furnace is opened by the lifting structure. When the furnace door body rises to a suitable height, the pushing frame is immediately pushed, which drives the connecting rod to push the limiting plate to push the guide rod to move, and the guide rod enters between the support plate and the limiting strip located above, so that the furnace door body can be well prevented from falling. When working, the limiting plate is pushed to the surface of the inner cavity close to the movable opening to determine the position of the guide rod. When the work is completed and the limit of the furnace door body needs to be released, the pushing frame is pulled, and the guide rod is driven to move to leave between the support plate and the limiting strip located above, so as to release the limit of the furnace door body. After the furnace door of the heating furnace is opened by the lifting structure, even after the lifting structure fails, the safety of the heating furnace door support can still be well guaranteed, thereby increasing the safety of use.

[0015] 2. The utility model solves the problem of inconveniently determining that the furnace door is in the correct position after the furnace door of the heating furnace is lifted by arranging a furnace door main body, a movable sleeve, a mounting plate and a limit assembly. Under the structural action of the furnace door main body lifting the furnace door on the furnace body, after the furnace door is lifted to a suitable height, the end of the movable sleeve close to the movable opening is aligned between the support plate and the limit strip located above, and then the pushing frame is pushed again until the guide rod enters between the support plate and the limit strip located above, and until the two guide rods completely cover the two photoelectric switches respectively, the warning light is turned on to determine that the furnace door main body is well supported and restricted, thereby effectively preventing the furnace door from falling. During operation, it is more convenient to determine that the furnace door is in the correct position after the furnace door of the heating furnace is lifted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a stereogram of the assembly structure of a manual anti-fall device for furnace doors;

[0018] Figure 2 This is a three-dimensional diagram of the main structure of the furnace door;

[0019] Figure 3 It is a three-dimensional diagram of the movable set structure;

[0020] Figure 4 It is a three-dimensional diagram of the mounting plate structure;

[0021] Figure 5 It is a three-dimensional diagram of the limit component structure.

[0022] Reference numerals:

[0023] 1. Furnace door body; 101. Fixed plate; 102. Limiting strip; 103. Support plate; 104. Photoelectric switch; 105. Warning light; 2. Movable sleeve; 201. Inner cavity; 202. Movable opening; 3. Mounting plate; 301. Ear plate; 302. Fixed opening; 4. Limiting assembly; 401. Pushing frame; 402. Connecting rod; 403. Limiting plate; 404. Guide rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0026] See also Figure 1-5 The utility model is a manual anti-falling device for furnace door, comprising a furnace door body 1, a movable sleeve 2, a mounting plate 3 and a limiting assembly 4. A fixing plate 101 is fixed to the front side of the furnace door body 1. When working, the furnace door body 1 closes the furnace mouth of the heating furnace, and a limiting strip 102 is connected thereto through the fixing plate 101. The front side of the fixing plate 101 is symmetrically fixed with limiting strips 102 along a center line parallel to the long side, and a supporting plate 103 is connected thereto through the limiting strip 102 located below, and a supporting plate 103 is fixed on the top of the limiting strip 102 located below, and a guide rod 404 is supported thereon in an automatic state through the supporting plate 103. When the furnace door body 1 is to be lowered, the guide rod 404 is movably connected to the fixing plate 101. It is connected between the top of the support plate 103 and the limiting strip 102 located above, and inserted into the movable sleeve 2, so that the position of the furnace door body 1 is well supported. Movable sleeves 2 are arranged on both sides of the furnace door body 1, and a mounting plate 3 is arranged at the rear of each movable sleeve 2. The movable sleeve 2 is installed on the furnace body through the mounting plate 3. The two movable sleeves 2 are both connected with a movable limit assembly 4. The limit assembly 4 includes a guide rod 404. The guide rod 404 is inserted through one end of the movable sleeve 2 close to the furnace door body 1. The end of the guide rod 404 extending out of the movable sleeve 2 is arranged between the top of the support plate 103 and the limiting strip 102 located above, so that when working, it provides support for the furnace door body 1 at a suitable position on the furnace body.

[0027] Specifically, two photoelectric switches 104 are fixed on the front side of the fixed plate 101. The photoelectric switches 104 are arranged directly behind the two guide rods 404 between the top of the support plate 103 and the limiting strip 102 located above. A warning light 105 is fixed on the front side of the furnace door body 1 below the fixed plate 101. When working, the warning light 105 is turned on after the two photoelectric switches 104 are just covered by the guide rods 404. After the warning light 105 is turned on, it is determined that the furnace door body 1 is restricted.

[0028] Furthermore, a movable opening 202 is formed at one end of the movable sleeve 2 close to the furnace door body 1 , and the guide rod 404 is inserted into the movable opening 202 . The movable sleeve 2 is movably connected to the guide rod 404 through the movable opening 202 .

[0029] The operation process of this embodiment is as follows: when working, the furnace door main body 1 is lifted on the furnace body by the structure of the furnace door, so that the furnace door is lifted to a suitable height, and the end of the movable sleeve 2 close to the movable opening 202 is aligned between the support plate 103 and the limiting strip 102 located above. At this time, the pushing frame 401 is pushed again until the guide rod 404 enters between the support plate 103 and the limiting strip 102 located above, until the two guide rods 404 completely cover the two photoelectric switches 104 respectively, and then the warning light 105 is turned on to confirm that the furnace door main body 1 is supported and restricted, so as to prevent the furnace door from falling. Specific embodiment 2

[0031] See also Figure 1 , 2 5. On the basis of the specific embodiment 1, the limiting assembly 4 also includes a pushing frame 401, a connecting rod 402 and a limiting plate 403. The limiting plate 403 is fixed to the end of the guide rod 404 away from the furnace door body 1, the connecting rod 402 is fixed to the end of the limiting plate 403 away from the guide rod 404, and the pushing frame 401 is fixed to the end of the connecting rod 402 away from the limiting plate 403. When the limiting assembly 4 is working, the connecting rod 402 is pushed by the pushing frame 401, driving the connecting plate to drive the guide rod 404 in the movable sleeve 2 to move between the support plate 103 and the limiting strip 102 located above.

[0032] Specifically, the movable sleeve 2 is provided with an inner cavity 201, the inner diameter of the inner cavity 201 is equal to the diameter of the limiting plate 403 and is connected to the movable opening 202, the limiting plate 403 is movably connected in the inner cavity 201, the connecting rod 402 is inserted into the end of the movable sleeve 2 away from the furnace door body 1, and the movable sleeve 2 passes through the inner cavity 201. The limiting plate 403 is movably connected therein, and the movable position of the connecting rod 402 is limited by the limiting plate 403.

[0033] Furthermore, ear plates 301 are fixed at the edges of the two vertical sides on the front side of the mounting plate 3, and fixing openings 302 are opened in the two ear plates 301 corresponding to the positions of the movable sleeve 2. The movable sleeve 2 is fixed in the fixing openings 302, and the mounting plate 3 fixes the movable sleeve 2 through the fixing openings 302 on the ear plates 301, and is installed and fixed at a suitable position on the furnace body through the mounting plate 3, so as to support the movable sleeve 2 at a suitable position on the furnace body.

[0034] The operation process of this embodiment is as follows: during work, after the furnace door body 1 rises to a suitable height, the pushing frame 401 is pushed immediately, driving the connecting rod 402 to push the limiting plate 403 to push the guide rod 404 to move, and the guide rod 404 enters between the support plate 103 and the limiting strip 102 located above, so that the furnace door body 1 can be well prevented from falling. When working, the limiting plate 403 is pushed to the surface of the inner cavity 201 close to the movable opening 202 to determine the position of the guide rod 404. When the work is completed and the limit of the furnace door body 1 needs to be released, the pushing frame 401 is pulled, and the pushing frame 401 is pulled to drive the guide rod 404 to move to leave the support plate 103 and between the limiting strip 102 located above, thereby releasing the limit of the furnace door body 1.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A manual anti-fall device for a furnace door, comprising a furnace door body (1), a movable sleeve (2), a mounting plate (3) and a limit assembly (4), characterized in that: A fixing plate (101) is fixed on the front side of the furnace door body (1), and a limiting strip (102) is symmetrically fixed on the front side of the fixing plate (101) along a center line parallel to the long side, and a support plate (103) is fixed on the top of the limiting strip (102) located below. Both sides of the furnace door body (1) are provided with movable sleeves (2), and a mounting plate (3) is provided at the rear of each movable sleeve (2). A limit position assembly (4) is movably connected through the two movable sleeves (2), and the limit position assembly (4) comprises a guide rod (404), and the guide rod (404) is inserted through one end of the movable sleeve (2) close to the furnace door body (1), and the end of the guide rod (404) extending out of the movable sleeve (2) is arranged between the top of the support plate (103) and the limiting strip (102) located above.

2. A manual furnace door anti-falling device according to claim 1, characterized in that: Two photoelectric switches (104) are fixed on the front side of the fixed plate (101), and the photoelectric switches (104) are arranged directly behind two guide rods (404) between the top of the support plate (103) and the limiting strip (102) located above. A warning light (105) is fixed on the front side of the furnace door body (1) below the fixed plate (101).

3. A manual furnace door anti-falling device according to claim 1, characterized in that: An end of the movable sleeve (2) close to the furnace door body (1) is provided with a movable opening (202), and the guide rod (404) is inserted into the movable opening (202).

4. A manual furnace door anti-falling device according to claim 3, characterized in that: The limiting assembly (4) further comprises a pushing frame (401), a connecting rod (402) and a limiting plate (403); the limiting plate (403) is fixed to one end of the guide rod (404) away from the furnace door body (1); the connecting rod (402) is fixed to one end of the limiting plate (403) away from the guide rod (404); and the pushing frame (401) is fixed to one end of the connecting rod (402) away from the limiting plate (403).

5. A manual furnace door anti-falling device according to claim 4, characterized in that: An inner cavity (201) is provided in the movable sleeve (2), the inner diameter of the inner cavity (201) being equal to the diameter of the limiting plate (403) and being in communication with the movable opening (202), the limiting plate (403) being movably connected in the inner cavity (201), and the connecting rod (402) being plugged into the end of the movable sleeve (2) away from the furnace door body (1).

6. A manual furnace door anti-falling device according to claim 1, characterized in that: Ear plates (301) are fixed at the edges of the two vertical sides on the front side of the mounting plate (3), and fixing openings (302) are provided through the two ear plates (301) corresponding to the positions of the movable sleeves (2), and the movable sleeves (2) are fixed in the fixing openings (302).

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