Ladle baking device

Abstract

The utility model relates to the technical field of ladle baking devices, and discloses a ladle baking device which is characterized in that a cover body is of a circular plate-shaped structure and is used for covering a ladle, spray pipes are of cylindrical structures with two open ends and are fixedly arranged on the cover body, and the spray pipes are arranged on the cover body in a penetrating mode; the nozzles are respectively inserted into one end of the spray pipe, a plurality of air deflectors are arranged on the nozzles in a surrounding manner, the air deflectors are connected to the inner wall of the spray pipe, and nozzles are formed in the side walls of the nozzles, so that the following technical effects can be realized: air and fuel gas can be fully mixed through the spray pipe, the nozzles and the air deflectors; the air guide plate can change the direction of air passing through the spray pipe, the air passing through the air guide plate can be rotationally mixed with gas, the air and the gas can be fully mixed, the gas can be fully combusted, carbon monoxide generated by combustion of the gas is reduced, the environment is protected, and energy is saved. The multiple spray pipes are arranged on the cover body in a surrounding mode, the baking area can be increased through the multiple spray pipes, and therefore heating is more uniform, and the heating and drying efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of bread baking devices, for example, to a bread baking device. Background Art

[0002] At present, ladles are generally used to transport molten iron produced in steel plants. For newly built or repaired ladles, they must be completely dried before they can be put into use. Drying can remove moisture from the ladles to prevent explosions when high-temperature molten iron is poured into the ladles. Ladle drying can be used to dry the ladles.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] However, the existing ladle roaster does not burn the gas completely, the CO content in the flue gas is high, and the air temperature input to the traditional ladle roaster is low. The combustion efficiency is low during gas combustion, the energy saving effect is poor, and the flame nozzles are concentrated, which easily causes uneven heating inside the ladle. Utility Model Content

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiment of the present disclosure provides a bun toaster to solve the problems of insufficient gas combustion and small heating range of the conventional bun toaster.

[0007] In some embodiments, the ladle baking device includes: a cover body, which is a circular plate-like structure, used to cover the ladle; at least two nozzles, and the nozzles are cylindrical structures with openings at both ends, fixedly arranged on the cover body, and the nozzles are respectively arranged through the cover body; nozzles, respectively inserted into one end of the nozzles, the nozzles are connected to a gas pipe, and a plurality of air guide plates are arranged around the nozzles, the air guide plates are connected to the inner wall of the nozzle, the side wall of the nozzle is provided with a nozzle, and the nozzle is arranged between the air guide plates; sleeves, respectively sleeved on the outside of the nozzles, and one end of the sleeves is connected to the cover body, and the sleeves are connected to a connecting pipe.

[0008] In some embodiments, a nozzle is provided at one end of the nozzle pipe away from the nozzle head, the inner diameter of the nozzle is smaller than the inner diameter of the nozzle pipe close to the nozzle head, a mixing chamber is formed around the nozzle pipe between the nozzle head and the nozzle, and one end of the nozzle passes through the cover body and extends into the molten iron ladle.

[0009] In some embodiments, a heat storage tube is sleeved on the nozzle, a heat storage body is arranged inside the heat storage tube, one end of the heat storage tube away from the nozzle is connected to the side wall of the sleeve, and grid meshes are respectively arranged at both ends of the heat storage tube.

[0010] In some embodiments, the heat storage tube is a split structure, and the heat storage tube is made of silicon carbide.

[0011] In some embodiments, the showerhead is made of silicon carbide.

[0012] In some embodiments, the air guide plate is obliquely arranged on the nozzle.

[0013] In some embodiments, the connecting pipe is connected to a smoke exhaust pipe, and a smoke valve is provided on the smoke exhaust pipe. The connecting pipe is also connected to an air intake pipe, and an air intake valve is provided on the air intake pipe. The gas pipe is provided with a gas valve.

[0014] In some embodiments, a plurality of the smoke exhaust pipes are connected in parallel, a plurality of the air intake pipes are connected in parallel, and a plurality of the gas pipes are connected in parallel.

[0015] In some embodiments, rock wool is provided between the sleeve and the heat storage tube.

[0016] In some embodiments, a hinged frame is provided on the cover body, a first hinged rod is hingedly provided on the upper portion of the hinged frame, a second hinged rod is hingedly provided on the lower portion of the hinged frame, and the first hinged rod is arranged in parallel with the second hinged rod, and the other ends of the first hinged rod and the second hinged rod are respectively hingedly connected to the fixed frame.

[0017] The bread baking device provided by the embodiment of the present disclosure can achieve the following technical effects:

[0018] The air and gas can be fully mixed through the nozzle, nozzle and air guide plate. The air guide plate can change the direction of the air passing through the nozzle. The air and gas passing through the air guide plate can be rotated and mixed, so that the air and gas are fully mixed, the gas can be fully burned, the carbon monoxide produced by gas combustion can be reduced, the environment can be protected, and energy can be saved. The nozzles are arranged on the cover body in multiple surroundings. The baking area can be increased through multiple nozzles, so that the heating is more uniform and the heating and drying efficiency is increased.

[0019] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0021] Figure 1 It is a schematic diagram of the overall structure of a bread baking device provided by an embodiment of the present disclosure;

[0022] Figure 2 is a schematic diagram of the cross-sectional structure of a bread baking device provided by an embodiment of the present disclosure;

[0023] Figure 3 is a schematic diagram of the nozzle structure provided by an embodiment of the present disclosure;

[0024] Figure 4 is a schematic diagram of a cross-sectional structure of a nozzle provided in an embodiment of the present disclosure;

[0025] Figure 5 is a schematic diagram of gas pipe connection provided by an embodiment of the present disclosure;

[0026] Figure 6 is a schematic diagram of the structure of the air intake pipe and the smoke exhaust pipe provided in an embodiment of the present disclosure;

[0027] Figure 7 It is a schematic diagram of the structure of the articulated frame provided in an embodiment of the present disclosure.

[0028] Reference numerals:

[0029] 100, cover body; 101, molten iron ladle; 102, hinged frame; 103, first hinged rod; 104, second hinged rod; 105, fixed frame; 200, nozzle; 201, nozzle; 202, gas mixing chamber; 300, nozzle; 301, gas pipe; 302, air guide plate; 303, nozzle; 304, gas valve; 400, sleeve; 401, connecting pipe; 402, heat storage pipe; 403, heat storage body; 404, smoke exhaust pipe; 405, smoke valve; 406, air intake pipe; 407, air intake valve; 408, rock wool; 409, grille. DETAILED DESCRIPTION

[0030] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0031] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0032] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0033] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0034] Unless otherwise stated, the term "plurality" means two or more.

[0035] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0036] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0038] Combination Figure 1-7As shown, the embodiment of the present disclosure provides a ladle baking device, comprising a cover body 100, a nozzle 200, a nozzle head 300 and a sleeve 400. The cover body 100 is a circular plate-shaped structure, which is used to cover the ladle 101; there are at least two nozzles 200, and the nozzles 200 are cylindrical structures with openings at both ends, which are fixedly arranged on the cover body 100, and the nozzles 200 are respectively arranged to penetrate the cover body 100; the nozzles 300 are respectively inserted into one end of the nozzles 200, and the nozzles 300 are respectively arranged to penetrate the inner part of the inner part of the inner part of the outer part of the outer part. A gas pipe 301 is connected to the head 300, and a plurality of air guide plates 302 are arranged around the nozzle 300, and the air guide plates 302 are connected to the inner wall of the nozzle 200. A nozzle 303 is arranged on the side wall of the nozzle 300, and the nozzle 303 is arranged between the air guide plates 302; sleeves 400 are respectively sleeved on the outside of the nozzle 200, and one end of the sleeve 400 is connected to the cover body 100, and a connecting pipe 401 is connected to the sleeve 400.

[0039] The ladle roaster provided by the embodiment of the present disclosure has a cover 100 covering the upper part of the opening of the ladle 101. The cover 100 can prevent heat loss when the ladle 101 is heated. A plurality of nozzles 200 are provided through the cover 100. One end of the nozzle 200 extends out of the upper wall of the cover 100, and the other end extends out of the lower part of the cover 100. The nozzles 200 are arranged around the cover 100. The nozzles 200 can spray flames into the ladle 101. The ladle 101 can be dried by heating it with the jet flame. The nozzle 200 is a cylindrical structure with two ends open, which can accommodate the insertion of the nozzle 300. The nozzle 300 is connected with a gas pipe 301, which can provide gas for the nozzle 300 to spray flame. A wind shield is provided between the nozzle 300 and the nozzle 200. The wind guide plate 302 is fixedly connected to the nozzle 300. 02 is a plurality of nozzles 300 arranged around the nozzle 300. The nozzles 303 on the nozzle 300 are arranged between the air guide plates 302. Gas can be sprayed out through the nozzles 303. The air guide plates 302 can accommodate the passage of air. The air passing through the air guide plates 302 can drive the gas to pass through the nozzle 200. The mixed gas and air enter the iron ladle 101 through the nozzle 200. The air guide plates 302 are bent and arranged on the nozzle 300. The air passes through the air guide plates 302 to form a rotating airflow, so that the air and the gas can be fully mixed, so that the gas can be fully burned. The sleeve 400 sleeved outside the nozzle 200 can supply air. The air can be supplied to the sleeve 400 through the connecting channel. The smoke can flow back from the nozzle 200 into the connecting pipe 401 of the sleeve 400 for discharge. The iron ladle 101 can be heated and dried by alternating combustion and exhaust of smoke.

[0040] In detail, six nozzles 300 are respectively arranged on the cover body, and the six nozzles 300 are respectively connected to gas pipes 301, and gas valves 304 are respectively installed on the gas pipes 301. The six nozzles 300 correspond to six nozzles 200 and six sleeves 400, and the six sleeves 400 are respectively connected to six connecting pipes 401, and the six connecting pipes 401 are respectively connected to six smoke exhaust pipes 404 and six air intake pipes 406, and the six air intake pipes 406 are respectively provided with air intake valves 407, and the six smoke exhaust pipes 404 are respectively provided with smoke valves 405. Heat storage pipes 402 and heat storage bodies 403 are respectively arranged in the six sleeves 400, and the heating of the heat storage bodies 403 and the combustion in the molten iron ladle 101 are carried out simultaneously. Six nozzles 300 are arranged in a circular pattern, and are numbered 1, 2, 3, 4, 5 and 6 groups in sequence from the first to the last. The gas valves 304 and the air intake valves 407 of the 1, 3 and 5 groups are opened, and the smoke valves 405 are closed. The 1, 3 and 5 groups burn and heat the molten iron ladle. At the same time, the gas valves 304 and the air intake valves 407 of the 2, 4 and 6 groups are closed, and the smoke valves 405 are opened for exhausting smoke. The smoke passes through the sleeves 400 of the 2, 4 and 6 groups to heat the heat storage body 403 in the sleeves 400. At this time, the heat storage body 403 of the 2, 4 and 6 groups is heated. The heat storage body 403 absorbs the heat of the flue gas to cool the flue gas; after a period of time, the temperature of the heat storage body 403 of groups 1, 3, and 5 decreases, and the temperature of the heat storage body 403 of groups 2, 4, and 6 increases. The gas valve 304 and the air intake valve 407 of groups 1, 3, and 5 are closed, and the flue gas valve 405 is opened. The gas valve 304 and the air intake valve 407 of groups 2, 4, and 6 are opened, and the flue gas valve 405 is closed. Through valve switching, groups 1, 3, and 5 are used to exhaust smoke and heat the heat storage body 403, while groups 2, 4, and 6 are used to burn and heat the ladle 101. This process is carried out alternately, which can reduce the smoke temperature, realize the recycling of the smoke temperature, and preheat the air entering the nozzle 200 to increase the combustion efficiency of the gas and save energy.

[0041] Optionally, a nozzle 201 is provided at one end of the nozzle 200 away from the nozzle 300, and the inner diameter of the nozzle 201 is smaller than the inner diameter of the nozzle 200 near the nozzle 300. A gas mixing chamber 202 is formed around the nozzle 200 between the nozzle 300 and the nozzle 201, and one end of the nozzle 201 passes through the cover 100 and extends into the iron ladle 101. In this way, the end of the nozzle 200 extending into the water lifting ladle away from the nozzle 201 is the nozzle 201, and the inner diameter of the nozzle 201 is smaller than the inner diameter of the nozzle 200. The air and gas mixed gas in the nozzle 200 will be pressurized through the nozzle 201 with a smaller inner diameter, and the pressurized air and gas are ejected through the nozzle 201. The nozzle 201 can increase the flame injection distance, and the flame can penetrate into the iron ladle 101. The gas mixing chamber 202 formed between the nozzle 201 and the nozzle 300 can fully mix the air and the gas, so that the gas can be burned more fully and the generation of carbon monoxide can be reduced.

[0042] Optionally, the nozzle 200 is sleeved with a heat storage tube 402, a heat storage body 403 is arranged in the heat storage tube 402, the end of the heat storage tube 402 away from the nozzle 200 is connected to the side wall of the sleeve 400, and the two ends of the heat storage tube 402 are respectively provided with a grid net 409. In this way, by sleeved the heat storage tube 402 on the nozzle 200, the end of the heat storage tube 402 away from the nozzle 200 is connected to the inner wall of the sleeve, the connecting pipe 401 is connected to the inside of the heat storage tube 402, and the two ends of the heat storage tube 402 are respectively covered with a grid net 409, and the heat storage body 403 is placed in the heat storage tube 402. The heat storage body 403 can be sand and gravel particles or steel particles. The grid net 409 can prevent the heat storage body 403 from flowing out of the heat storage tube 402;

[0043] When the ladle 101 is heated, air enters the heat storage tube 402 through the sleeve 400 and exchanges heat with the heat storage body 403 in the heat storage tube 402. The air after heat exchange flows through the nozzle 300 and mixes with the gas. The thermal efficiency of the gas combustion can be increased by heating the air.

[0044] Optionally, the heat storage tube 402 is a split structure, and the heat storage tube 402 is made of silicon carbide. In this way, the heat storage tube 402 can be set as a tubular structure with two or three sections that can be split and connected, and the heat storage tubes 402 can be combined and connected. The connection of multiple sections of heat storage tubes 402 can increase the storage capacity of the heat storage body 403, so that the heat exchange of the heat storage body 403 is increased, thereby increasing the single heat exchange with the air, and also increasing the cooling amount of the flue gas. The volume in the heat storage tube 402 can be controlled by the split heat storage tube 402, so that the combustion time of the nozzle 300 can be adjusted. The split structure of the heat storage tube 402 is also convenient for cleaning the heat storage tube 402. The heat storage tube 402 is made of silicon carbide material to increase the heat resistance of the heat storage tube 402.

[0045] Optionally, the nozzle 300 is made of silicon carbide. In this way, the nozzle 300 is arranged between the heat storage bodies 403, and the nozzle 300 made of silicon carbide can prevent damage caused by the high temperature of the flue gas.

[0046] Optionally, the air guide plate 302 is tiltedly arranged on the nozzle 300. In this way, the air guide plate 302 and the nozzle 300 are tiltedly arranged, and when the air and the gas flow through the air guide plate 302, the gas and the air can form a rotating airflow, and the rotation of the airflow can fully mix the gas and the air.

[0047] Optionally, the communication pipe 401 is connected to a smoke exhaust pipe 404, and a smoke valve 405 is provided on the smoke exhaust pipe 404. The communication pipe 401 is also connected to an air intake pipe 406, and an air intake valve 407 is provided on the air intake pipe 406. In this way, the smoke exhaust pipe 404 and the air intake pipe 406 are respectively connected to the communication pipe 401, and smoke and air share a common connection pipe. The smoke exhaust pipe 404 is equipped with a smoke valve 405, and the smoke valve 405 can control the sealing and opening of the smoke exhaust pipe 404. The air intake valve 407 on the air intake pipe 406 can control the air to enter the air intake pipe 406. By controlling the smoke valve 405 and the air intake valve 407 respectively, the smoke exhaust or air entry of the communication pipe 401 can be controlled.

[0048] Optionally, a gas valve 304 is provided on the gas pipe 301. In this way, the gas valve 304 on the gas pipe 301 can allow air and gas to enter, and the intermittent combustion of the nozzle 300 can be controlled through the gas valve 304.

[0049] Optionally, multiple smoke exhaust pipes 404 are connected in parallel, multiple air intake pipes 406 are connected in parallel, and multiple gas pipes 301 are connected in parallel. In this way, the smoke exhaust pipes 404 can be connected to exhaust smoke, and the smoke valve 405 on the smoke exhaust pipe 404 can control the exhaust of smoke in a single sleeve 400 respectively, the air intake pipes 406 can be connected to supply gas together, and the air intake valve 407 on the air intake pipe 406 can supply gas to the sleeve 400 respectively, the gas pipes 301 can be connected to supply gas, and the gas valve 304 can control the gas supply to the nozzle 300 respectively.

[0050] Optionally, rock wool 408 is provided between the sleeve 400 and the heat storage tube 402. In this way, the rock wool 408 between the sleeve 400 and the heat storage tube 402 can insulate heat and prevent the heat in the heat storage tube 402 from being lost.

[0051] Optionally, a hinged frame 102 is provided on the cover body 100, and a first hinged rod 103 is hingedly provided on the upper portion of the hinged frame 102, and a second hinged rod 104 is hingedly provided on the lower portion of the hinged frame 102, and the first hinged rod 103 and the second hinged rod 104 are hingedly provided in parallel, and the other ends of the first hinged rod 103 and the second hinged rod 104 are respectively hingedly connected to a fixed frame 105. In this way, the cover body 100 is fixedly connected with the hinge frame 102, and the first hinge rod 103 and the second hinge rod 104 are respectively connected to the hinge frame 102, the first hinge rod 103 and the second hinge rod 104 are arranged in parallel, and the other ends of the first hinge rod 103 and the second hinge rod 104 are respectively hingedly connected to the fixed frame 105. Through the frame structure composed of the hinge frame 102, the fixed frame 105, the first hinge rod 103 and the second hinge rod 104, the hinge frame 102 can be driven to rise and fall by the swing of the first hinge rod 103 and the second hinge rod 104, and the lifting and lowering of the hinge frame 102 can drive the cover body 100 to rise and fall, so as to facilitate the cover body 100 to be covered on the molten iron ladle 101.

[0052] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A bag baking device, characterized in that: include: The cover body (100) is a circular plate-shaped structure and is used to cover the molten iron ladle (101); There are at least two nozzles (200), and the nozzles are cylindrical structures with openings at both ends, fixedly arranged on the cover body (100), and the nozzles (200) are respectively arranged to penetrate the cover body (100); A nozzle (300) is inserted into one end of the nozzle pipe (200), the nozzle (300) is connected to a gas pipe (301), and a plurality of air guide plates (302) are arranged around the nozzle (300), the air guide plates (302) are connected to the inner wall of the nozzle pipe (200), a nozzle (303) is arranged on the side wall of the nozzle (300), and the nozzle (303) is arranged between the air guide plates (302); The sleeves (400) are respectively sleeved on the outside of the nozzles (200), and one end of the sleeves (400) is connected to the cover body (100). The sleeves (400) are connected to a communication pipe (401).

2. The baking device according to claim 1, characterized in that: A nozzle (201) is provided at one end of the nozzle pipe (200) away from the nozzle head (300); the inner diameter of the nozzle (201) is smaller than the inner diameter of the nozzle pipe (200) close to the nozzle head (300); a gas mixing chamber (202) is formed in the nozzle pipe (200) between the nozzle head (300) and the nozzle opening (303); one end of the nozzle (201) passes through the cover body (100) and extends into the iron ladle (101).

3. The baking device according to claim 1, characterized in that: A heat storage tube (402) is sleeved on the nozzle (200), a heat storage body (403) is arranged inside the heat storage tube (402), one end of the heat storage tube (402) away from the nozzle (200) is connected to the side wall of the sleeve (400), and grid nets (409) are respectively arranged at both ends of the heat storage tube (402).

4. The baking device according to claim 3, characterized in that: The heat storage tube (402) is a split structure, and the heat storage tube (402) is made of silicon carbide.

5. The bag toasting device according to claim 1, characterized in that: The nozzle (300) is made of silicon carbide.

6. The baking device for bread according to claim 1, characterized in that: The air guide plate (302) is arranged obliquely on the nozzle (300).

7. The baking device according to claim 1, characterized in that: The connecting pipe (401) is connected to a smoke exhaust pipe (404), and a smoke valve (405) is provided on the smoke exhaust pipe (404). The connecting pipe (401) is also connected to an air intake pipe (406), and an air intake valve (407) is provided on the air intake pipe (406). The gas pipe (301) is provided with a gas valve (304).

8. The bag toasting device according to claim 7, characterized in that: The plurality of smoke exhaust pipes (404) are connected in parallel, the plurality of air intake pipes (406) are connected in parallel, and the plurality of gas pipes (301) are connected in parallel.

9. The baking device for bread according to claim 3, characterized in that: Rock wool (408) is arranged between the sleeve (400) and the heat storage tube (402).

10. The baking device for bread according to claim 6, characterized in that: The cover body (100) is provided with a hinged frame (102), the upper portion of the hinged frame (102) is hingedly provided with a first hinged rod (103), the lower portion of the hinged frame is hingedly provided with a second hinged rod (104), and the first hinged rod (103) and the second hinged rod (104) are arranged in parallel, and the other ends of the first hinged rod (103) and the second hinged rod (104) are respectively hingedly connected to a fixed frame (105).

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