Circulating fan system of annealing furnace

Abstract

The utility model relates to the technical field of annealing furnaces, in particular to a circulating fan system of an annealing furnace, which comprises a circulating fan, the circulating fan is arranged in a fan port at one end of a furnace body in an elastic connection mode, and binding surfaces which can be mutually contacted in a combined state are arranged between the circulating fan and the fan port. And tight attachment between the attachment surfaces is kept through elastic force so as to block the fan opening. According to the utility model, the connection mode of the circulating fan and the fan opening is changed from bolt fixed connection to elastic connection, so that the circulating fan and the fan opening can be kept fit under the action of elastic force, and the fan opening is blocked to seal the furnace body, so that when the thrust of the pressure in the furnace body acting on the circulating fan exceeds the elastic force, the circulating fan and the fan opening can be closed. And the circulating fan is pushed out from the fan opening to open the fan opening to directly and quickly release the pressure in the furnace body, so that the safety of a furnace body product is ensured, and the economic loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of annealing furnace technology, and in particular to a circulating fan system for an annealing furnace. Background Technology

[0002] During the annealing process, the internal pressure of the annealing furnace may increase due to various reasons. If effective pressure relief measures are not taken, it may lead to serious consequences such as equipment explosion or fire. The conventional method is to install a pressure relief valve on the furnace body. However, when the internal pressure of the furnace body is too high, the pressure relief valve cannot release the pressure quickly in a short time, which may cause the furnace body to explode. The powerful impact force can even directly blow the furnace body away and cause an accident. Therefore, it is necessary to design a structure that can quickly relieve pressure in an emergency to protect the furnace body and the materials inside. Utility Model Content

[0003] In view of this, the purpose of this utility model is to propose a circulating fan system for an annealing furnace to solve the technical problem that existing annealing furnaces cannot quickly release the internal pressure of the furnace body in a short period of time.

[0004] To achieve the above objectives, this utility model provides a circulating fan system for an annealing furnace, including a circulating fan. The circulating fan is elastically connected to a fan inlet at one end of the furnace body. The circulating fan and the fan inlet have contacting surfaces that can be in contact when the furnace body is closed. The elastic force keeps the contacting surfaces tightly closed to block the fan inlet, thereby sealing the furnace body. When the pressure inside the furnace body exerts a thrust on the circulating fan that exceeds the elastic force, the circulating fan is pushed out of the fan inlet, causing the contacting surfaces to separate and creating a gap connecting the fan inlet. This allows the internal pressure of the furnace body to be released directly through the fan inlet. After the internal pressure of the furnace body returns to normal, the elastic force pulls the circulating fan back to the fan inlet to reseal the furnace body.

[0005] As a preferred embodiment of the present invention, the fan outlet has a first mounting plate for mounting a circulating fan, the circulating fan has a second mounting plate adapted to the first mounting plate, the second mounting plate and the first mounting plate have a mating surface that can contact each other after being joined together, and an elastic component for keeping the two joined together is provided between the first mounting plate and the second mounting plate.

[0006] As a preferred embodiment of this utility model, a sealing element is provided between the mating surfaces. The sealing element is a sealing ring, and the sealing ring is detachably connected to the mounting groove formed on the mating surface of the first mounting plate.

[0007] As a preferred embodiment of this invention, the elastic component includes multiple elastic units, each elastic unit comprising:

[0008] A positioning rod with one end located on the mating surface of the first mounting plate, and the other end of the positioning rod passing through a through hole in the second mounting plate and partially protruding from the second mounting plate;

[0009] A spring fitted onto the protruding part of the positioning rod;

[0010] Locking structure for positioning the spring on the positioning rod.

[0011] As a preferred embodiment of this utility model, the locking structure includes a fastening nut, which is adapted to the external thread formed on the protruding part of the positioning rod.

[0012] As a preferred embodiment of this utility model, the protruding part of the positioning rod is provided with a first washer and a second washer, and the first washer and the second washer respectively abut against the two ends of the spring.

[0013] As a preferred embodiment of this invention, all the elastic elements are arranged in a ring array about the axis of the fan outlet.

[0014] As a preferred technical solution of this utility model, the first mounting plate and the second mounting plate adopt an annular plate structure, and the center lines of the first mounting plate, the second mounting plate and the fan outlet coincide with each other.

[0015] The beneficial effects of this utility model are as follows: By replacing the bolted connection between the circulating fan and the fan outlet with an elastic connection, the circulating fan and the fan outlet can remain in contact under the action of elastic force, thereby blocking the fan outlet to seal the furnace body. When the pressure inside the furnace body acts on the thrust of the circulating fan and exceeds the elastic force, the circulating fan is pushed out of the fan outlet, thereby opening the fan outlet to directly and quickly release the internal pressure of the furnace body, thus ensuring the safety of the furnace body products and reducing economic losses. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the external three-dimensional structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the semi-sectional three-dimensional structure of this utility model;

[0019] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4 This is a three-dimensional structural diagram of the first mounting plate, the second mounting plate, the circulating fan, and the spring of this utility model.

[0021] Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the first mounting plate, positioning rod, and sealing ring of this utility model.

[0022] The markings in the diagram are as follows: 1. Furnace body; 2. Fan inlet; 3. Circulating fan; 4. Positioning rod; 5. Through hole; 6. External thread; 7. Fastening nut; 8. First washer; 9. Spring; 10. Second washer; 11. Mounting groove; 12. Sealing ring; 13. First mounting plate; 14. Second mounting plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figure 1 and Figure 2 As shown, a circulating fan system for an annealing furnace includes a circulating fan 3. The circulating fan 3 is elastically connected to a fan port 2 at one end of the furnace body 1. The circulating fan 3 and the fan port 2 have a contacting surface that can contact each other when they are joined together. The elastic force keeps the contacting surfaces tightly joined to block the fan port 2, thereby sealing the furnace body 1. When the pressure inside the furnace body 1 exerts a thrust on the circulating fan 3 that exceeds the elastic force, the circulating fan 3 is pushed out of the fan port 2, causing the contacting surfaces to separate and creating a gap connecting the fan port 2. This allows the internal pressure of the furnace body 1 to be released directly through the fan port 2. After the internal pressure of the furnace body 1 returns to normal, the elastic force pulls the circulating fan 3 back to the fan port 2 to reseal the furnace body 1.

[0026] The above technical solution can quickly release the internal pressure of the furnace body 1 in a short time. During use, by elastically connecting the circulating fan 3 to the furnace body 1, when the internal pressure of the furnace body 1 stabilizes within a preset range, the pressure is less than the elastic force between the circulating fan 3 and the fan outlet 2. Under the action of the elastic force, the circulating fan 3 and the fan outlet 2 maintain a tight fit, thereby blocking the fan outlet 2 of the furnace body 1 to achieve a sealed furnace body 1, thus maintaining stable internal pressure and oxygen content in the annealing furnace. When the internal pressure of the furnace body 1 increases due to various reasons, and when the pressure acts... When the thrust of the circulating fan 3 exceeds the elastic force, it will push the circulating fan 3 out of the fan outlet 2. The contact surface of the circulating fan 3 will separate from the contact surface of the fan outlet 2 and create a gap. The gap connects to the fan outlet 2, thereby quickly releasing the internal pressure of the furnace body 1 through the fan outlet 2. When the internal pressure of the furnace body 1 returns to normal, that is, when the thrust of the pressure acting on the circulating fan 3 is less than the elastic force, the elastic force will pull the circulating fan 3 back and re-block the fan outlet 2. That is, the contact surface of the circulating fan 3 and the contact surface of the fan outlet 2 will be re-adhere to each other, thereby blocking the fan outlet 2.

[0027] like Figure 2 and Figure 4 As shown, in this embodiment, the fan outlet 2 has a first mounting plate 13 for mounting the circulating fan 3, and the circulating fan 3 has a second mounting plate 14 adapted to the first mounting plate 13. The second mounting plate 14 and the first mounting plate 13 have a mating surface that can contact each other after being combined. An elastic component for keeping the two combined is provided between the first mounting plate 13 and the second mounting plate 14. Preferably, the first mounting plate 13 and the second mounting plate 14 adopt an annular plate structure, and the center lines of the first mounting plate 13, the second mounting plate 14 and the fan outlet 2 coincide with each other.

[0028] The above technical solution can connect the circulating fan 3 and the fan outlet 2 in an elastic manner through an elastic component. The elastic component keeps the mating surfaces of the first mounting plate 13 and the second mounting plate 14 in close contact, thereby blocking the fan outlet 2.

[0029] like Figure 3 and Figure 4 As shown, in this embodiment, the elastic component includes multiple elastic units, each elastic unit including: a positioning rod 4 with one end disposed on the mating surface of the first mounting plate 13, the other end of the positioning rod 4 passing through a through hole 5 opened in the second mounting plate 14 and partially protruding from the second mounting plate 14; a spring 9 sleeved on the protruding part of the positioning rod 4; and a locking structure for positioning the spring 9 on the positioning rod 4; preferably, the locking structure includes a fastening nut 7, the fastening nut 7 being adapted to the external thread 6 opened in the protruding part of the positioning rod 4;

[0030] The above technical solution can keep the second mounting plate 14 of the circulating fan 3 and the first mounting plate 13 of the fan port 2 in contact with each other through the spring 9. In use, when the internal pressure of the furnace body 1 acts on the thrust of the circulating fan 3, it will cause the circulating fan 3 and the second mounting plate 14 to compress the spring 9, so that the circulating fan 3 extends out from the fan port 2, thereby causing the second mounting plate 14 and the first mounting plate 13 to separate and create a gap, opening the fan port 2 to release pressure on the furnace body 1. When the internal pressure of the furnace body 1 returns to normal, the spring 9 drives the second mounting plate 14 to reconnect with the circulating fan 3 and reset, and the second mounting plate 14 and the first mounting plate 13 re-fit, blocking the fan port 2.

[0031] like Figure 3 and Figure 4 As shown, in this embodiment, a first washer 8 and a second washer 10 are provided on the protruding part of the positioning rod 4, and the first washer 8 and the second washer 10 respectively abut against the two ends of the spring 9.

[0032] The above technical solution can support both ends of the spring 9 by setting the first washer 8 and the second washer 10, thereby reducing wear between the spring 9 and the second mounting plate 14 and improving service life.

[0033] like Figure 5 As shown, in this embodiment, a sealing element is provided between the mating surfaces. The sealing element is a sealing ring 12, and the sealing ring 12 is detachably connected to the mounting groove 11 opened on the mating surface of the first mounting plate 13.

[0034] The above technical solution can further improve the sealing effect of the furnace body 1. When the first mounting plate 13 and the second mounting plate 14 are attached to each other, the sealing ring 12 can be compressed to fill the gap, preventing outside air from entering the furnace body 1 and causing material oxidation. It should be noted that concave sealing rings should be avoided as much as possible, mainly to prevent the circulating fan 3 from not being able to fully flatten the sealing ring 12 after resetting. In addition, the material used to manufacture the sealing ring 12 needs to have sufficient high temperature resistance.

[0035] like Figure 1 and Figure 2 As shown, in this embodiment, all elastic elements are arranged in a ring array about the axis of the fan outlet 2;

[0036] The above technical solution can make the elastic force between the circulating fan 3 and the fan outlet 2 uniform and stable, and prevent the occurrence of inconsistent elastic force in some areas.

[0037] Working principle: During the annealing process, the internal pressure of the furnace body 1 increases due to various reasons. When the thrust of the internal pressure of the furnace body 1 on the circulating fan 3 exceeds the elastic force of the spring 9, the circulating fan 3, along with the second mounting plate 14, compresses the spring 9, causing the circulating fan 3 to extend from the fan port 2. This causes the second mounting plate 14 to separate from the first mounting plate 13, creating a gap. The fan port 2 is opened to release pressure from the furnace body 1, achieving rapid pressure relief. When the internal pressure of the furnace body 1 returns to normal, the spring 9 drives the second mounting plate 14 to reconnect with the circulating fan 3 and reset. The second mounting plate 14 and the first mounting plate 13 re-attach and compress the sealing ring 12, blocking the fan port 2. This prevents the furnace body 1 from being damaged due to excessive pressure that cannot be released in time, while protecting the materials inside the furnace body 1 and reducing economic losses.

[0038] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0039] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A circulating fan system for an annealing furnace, comprising a circulating fan (3), characterized in that, The circulating fan (3) is elastically connected to the fan port (2) at one end of the furnace body (1). The circulating fan (3) and the fan port (2) have a contact surface that can contact each other when they are in a combined state. The elastic force keeps the contact surface tightly attached to block the fan port (2) and thus seal the furnace body (1). When the pressure inside the furnace body (1) acts on the circulating fan (3) and the thrust exceeds the elastic force, the circulating fan (3) is pushed out from the fan port (2), causing the contact surface to separate and create a gap connecting the fan port (2). Thus, the internal pressure of the furnace body (1) is directly released through the fan port (2). After the internal pressure of the furnace body (1) returns to normal, the circulating fan (3) is pulled back to the fan port (2) by the elastic force to reseal the furnace body (1).

2. The circulating fan system of the annealing furnace according to claim 1, characterized in that, The fan outlet (2) has a first mounting plate (13) for mounting a circulating fan (3), the circulating fan (3) has a second mounting plate (14) adapted to the first mounting plate (13), the second mounting plate (14) and the first mounting plate (13) have a mating surface that can contact each other after being combined, and an elastic component for keeping the two combined is provided between the first mounting plate (13) and the second mounting plate (14).

3. The circulating fan system of the annealing furnace according to claim 2, characterized in that, A sealing element is provided between the mating surfaces. The sealing element is a sealing ring (12). The sealing ring (12) is detachably connected to the mounting groove (11) opened on the mating surface of the first mounting plate (13).

4. The circulating fan system of the annealing furnace according to claim 2 or 3, characterized in that, The elastic component includes multiple elastic units, each elastic unit comprising: A positioning rod (4) is provided at one end on the mating surface of the first mounting plate (13), and the other end of the positioning rod (4) passes through the through hole (5) opened in the second mounting plate (14) and partially protrudes from the second mounting plate (14). A spring (9) fitted onto the protruding part of the positioning rod (4); Locking structure for positioning the spring (9) on the positioning rod (4).

5. The circulating fan system of the annealing furnace according to claim 4, characterized in that, The locking structure includes a fastening nut (7) that is adapted to the external thread (6) formed on the protruding part of the positioning rod (4).

6. The circulating fan system of the annealing furnace according to claim 5, characterized in that, The protruding part of the positioning rod (4) is provided with a first washer (8) and a second washer (10), which respectively abut against the two ends of the spring (9).

7. The circulating fan system of the annealing furnace according to claim 4, characterized in that, All the elastic elements are arranged in a ring array about the axis of the fan outlet (2).

8. The circulating fan system of the annealing furnace according to claim 2, characterized in that, The first mounting plate (13) and the second mounting plate (14) adopt an annular plate structure, and the center lines of the first mounting plate (13), the second mounting plate (14) and the fan outlet (2) coincide with each other.

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