Circulating fan mounting structure of well type nitriding furnace

Abstract

The utility model relates to the technical field of nitriding furnaces, and discloses a circulating fan mounting structure of a well-type nitriding furnace, which comprises a furnace cover, a fan shell arranged below the furnace cover, an impeller component arranged on the inner side of the fan shell, a motor fixedly mounted at the top of the furnace cover and used for driving the impeller component to rotate, and a wind scooper arranged below the fan shell, the outer side of the wind scooper is fixedly connected with a plurality of fixing rods which are distributed around the wind scooper at equal angles, the top ends of the fixing rods are fixedly connected with the furnace cover, a gap between the wind scooper and the fan shell is an air gap, and the top of the fan shell is provided with a plurality of adjusting pieces used for driving the fan shell to move in the vertical direction. The size of the air gap can be adjusted, operation is more convenient, and the installation efficiency of the fan is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitrogenization furnace technical field more specifically, the utility model relates to a kind of circulating fan mounting structure of pit type nitriding furnace. BACKGROUND

[0002] Nitriding is the key process to improve the surface wear resistance of workpiece. The existing gas nitriding equipment includes pit type nitriding furnace, box type nitriding furnace and the like. The pit type nitriding furnace is a commonly used gas nitriding equipment for carbon steel parts. The uniformity of nitriding and the cooling speed after the end of nitriding process are important performance indicators of the pit type nitriding furnace, which reflect the quality and processing efficiency of workpieces after nitriding treatment.

[0003] A fan needs to be installed in the nitriding furnace to circulate the atmosphere in the furnace. After the installation of the fan, a 1-2 cm air gap is usually left between the fan and the air guide cover. The size of the air gap can be adjusted to control the circulation speed of the atmosphere in the furnace. However, the position of the fan cannot be adjusted after the installation of the existing fan and air guide cover. Only by selecting appropriate accessories can the height of the air guide cover be adjusted to adjust the size of the air gap. This method requires constant adjustment of the air guide cover to ensure that the size of the air gap around the fan is uniform. Therefore, this installation method is inefficient. SUMMARY

[0004] To overcome the shortcomings of the prior art, the utility model provides a circulating fan mounting structure of pit type nitriding furnace, which solves the problem of the complicated process of adjusting the size of the air gap in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a circulating fan mounting structure of pit type nitriding furnace, comprising a furnace cover, a fan housing is arranged below the furnace cover, a impeller assembly is arranged on the inner side of the fan housing, a motor for driving the impeller assembly to rotate is fixedly installed on the top of the furnace cover, an air guide cover is arranged below the fan housing, a plurality of fixed rods are fixedly connected to the outer side of the air guide cover and are distributed at equal angles around the air guide cover, the top ends of the plurality of fixed rods are fixedly connected to the furnace cover, the gap between the air guide cover and the fan housing is an air gap, and a plurality of adjusting members for driving the fan housing to move in the vertical direction are arranged on the top of the fan housing.

[0006] As a preferred technical scheme of the utility model, the impeller assembly comprises an extension shaft penetrating through the top wall of the fan housing, the extension shaft is rotatably connected to the top wall of the fan housing, the top end of the extension shaft is fixedly connected to the output shaft of the motor, the bottom end of the extension shaft is fixedly connected to a mounting seat, the bottom end of the mounting seat is fixedly connected to an impeller, a sleeve ring is sleeved on the outer side of the mounting seat, the sleeve ring is rotatably connected to the mounting seat, a fixed frame is fixedly connected to the outer side of the sleeve ring, and one end of the fixed frame is fixedly connected to the inner wall of the fan housing.

[0007] As a preferred embodiment of this utility model, the vertical cross-section of the mounting base is an "I" shaped structure.

[0008] As a preferred embodiment of this utility model, the telescopic shaft includes a sleeve shaft, the top end of which is fixedly connected to the output shaft of the motor, and the bottom end of which is slidably connected to an insert shaft. The bottom end of the insert shaft is fixedly connected to a mounting base, and a limit strip is fixedly connected to the outer side of the sleeve shaft. The limit strip is slidably connected to the inner wall of the sleeve shaft.

[0009] As a preferred embodiment of this utility model, the inner wall of the sleeve shaft is provided with a limiting groove that matches the limiting strip, and the limiting strip can slide along the limiting groove.

[0010] As a preferred embodiment of this utility model, the adjusting component includes a fixed base fixedly connected to the bottom of the furnace cover, a lead screw rotatably connected to the inner side of the fixed base, a slider threadedly connected to the lead screw, a handwheel fixedly connected to one end of the lead screw, a connecting rod one hinged to the bottom end of the slider, a connecting rod two hinged to the bottom end of the connecting rod one, and the bottom end of the connecting rod two fixedly connected to the top wall of the fan housing.

[0011] As a preferred embodiment of this utility model, the bottom wall of the furnace cover is fixedly connected to a guide rail arranged parallel to the lead screw, and the top end of the guide rail is slidably connected to the guide rail.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the adjusting component drives the fan housing to move in the vertical direction, which can adjust the size of the air gap, making operation more convenient and effectively improving the installation efficiency of the fan; when the fan housing moves, the fixing frame drives the collar to move in the vertical direction, causing the telescopic shaft to retract or extend, which makes the impeller change with the change of the fan housing position, thereby ensuring that the fan housing maintains stable airflow after the position is adjusted. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the circulating fan installation structure of a pit-type nitriding furnace according to the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the circulating fan installation structure of a pit-type nitriding furnace according to the present invention. Figure 2 ;

[0015] Figure 3 This is a schematic diagram of the impeller assembly of this utility model;

[0016] Figure 4 This is a schematic diagram of the telescopic shaft of this utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the adjusting component of this utility model.

[0018] In the diagram: 1. Furnace cover; 2. Fan housing; 3. Motor; 4. Impeller assembly; 41. Telescopic shaft; 411. Sleeve shaft; 412. Insert shaft; 413. Limiting strip; 414. Limiting groove; 42. Mounting base; 43. Impeller; 44. Collar; 45. Fixing bracket; 5. Fixing rod; 6. Air guide hood; 7. Air gap; 8. Adjusting component; 81. Fixing base; 82. Guide rail; 83. Slider; 84. Lead screw; 85. Handwheel; 86. Connecting rod one; 87. Connecting rod two. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1 to 5 As shown, this utility model provides a circulating fan installation structure for a well-type nitriding furnace, including a furnace cover 1, a fan housing 2 disposed below the furnace cover 1, an impeller assembly 4 disposed on the inner side of the fan housing 2, a motor 3 for driving the impeller assembly 4 to rotate fixedly installed on the top of the furnace cover 1, an air guide shroud 6 disposed below the fan housing 2, and a plurality of fixed rods 5 distributed at equal angles around the air guide shroud 6 fixedly connected to the outer side of the air guide shroud 6, the top ends of the plurality of fixed rods 5 being fixedly connected to the furnace cover 1, the gap between the air guide shroud 6 and the fan housing 2 being an air gap 7, and a plurality of adjusting components 8 for driving the fan housing 2 to move in the vertical direction disposed on the top of the fan housing 2.

[0021] The fan housing 2 is moved vertically by the adjusting component 8, which allows the size of the air gap 7 to be adjusted, making operation more convenient and effectively improving the installation efficiency of the fan.

[0022] The impeller assembly 4 includes a telescopic shaft 41 that penetrates the top wall of the fan housing 2. The telescopic shaft 41 is rotatably connected to the top wall of the fan housing 2. The top end of the telescopic shaft 41 is fixedly connected to the output shaft of the motor 3. The bottom end of the telescopic shaft 41 is fixedly connected to a mounting base 42. The vertical cross-section of the mounting base 42 is an "I" shape. The bottom end of the mounting base 42 is fixedly connected to an impeller 43. A collar 44 is sleeved on the outside of the mounting base 42. The collar 44 is rotatably connected to the mounting base 42. A fixing frame 45 is fixedly connected to the outside of the collar 44. One end of the fixing frame 45 is fixedly connected to the inner wall of the fan housing 2.

[0023] The fan shell 2 is driven to move in the vertical direction by the adjusting piece 8, so that the size of the air gap 7 is adjusted, the sleeve ring 44 is driven to move in the vertical direction by the fixed frame 45, the telescopic shaft 41 is retracted or extended, and the impeller 43 is changed following the change of the position of the fan shell 2, so that the fan shell 2 can keep stable outflow after the position adjustment.

[0024] The telescopic shaft 41 comprises a sleeve shaft 411, the top end of the sleeve shaft 411 is fixedly connected with the output shaft of the motor 3, the bottom end of the sleeve shaft 411 is slidably connected with a plug shaft 412, the bottom end of the plug shaft 412 is fixedly connected with the mounting seat 42, the outer side of the sleeve shaft 411 is fixedly connected with a limiting strip 413, the limiting strip 413 is slidably connected with the inner wall of the sleeve shaft 411, the inner wall of the sleeve shaft 411 is provided with a limiting groove 414 matched with the limiting strip 413, and the limiting strip 413 can slide along the limiting groove 414.

[0025] The sleeve ring 44 is driven to move in the vertical direction by the fixed frame 45 through the movement of the fan shell 2, the plug shaft 412 and the sleeve shaft 411 slide relative to each other, the limiting strip 413 can keep the plug shaft 412 and the sleeve shaft 411 always rotating synchronously, so that the stable transmission is ensured, and the impeller 43 can stably rotate.

[0026] The adjusting piece 8 comprises a fixed seat 81 fixedly connected with the bottom of the furnace cover 1, a lead screw 84 rotatably connected with the inner side of the fixed seat 81, a sliding block 83 threadedly connected with the lead screw 84, a hand wheel 85 fixedly connected with one end of the lead screw 84, a connecting rod one 86 hingedly connected with the bottom end of the sliding block 83, a connecting rod two 87 hingedly connected with the bottom end of the connecting rod one 86, the bottom end of the connecting rod two 87 is fixedly connected with the top wall of the fan shell 2, the bottom wall of the furnace cover 1 is fixedly connected with a guide rail 82 arranged in parallel with the lead screw 84, and the top end of the guide rail 82 is slidably connected with the guide rail 82.

[0027] The lead screw 84 is rotated by rotating the hand wheel 85, the sliding block 83 slides along the guide rail 82, the connecting rod one 86 drives the connecting rod two 87 to move in the vertical direction, the fan shell 2 moves in the vertical direction, the size of the air gap 7 is adjusted, the operation is very convenient, and the installation efficiency of the fan is effectively improved.

[0028] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0029] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A circulating fan mounting structure of a pit-type nitriding furnace comprising a furnace cover (1) provided below with a fan casing (2), characterized in that: An impeller assembly (4) is provided on the inner side of the fan housing (2). A motor (3) for driving the impeller assembly (4) to rotate is fixedly installed on the top of the furnace cover (1). A guide shroud (6) is provided below the fan housing (2). Several fixed rods (5) are fixedly connected to the outer side of the guide shroud (6) and are distributed at equal angles around the guide shroud (6). The top ends of the fixed rods (5) are fixedly connected to the furnace cover (1). The gap between the guide shroud (6) and the fan housing (2) is an air gap (7). Several adjusting parts (8) for driving the fan housing (2) to move in the vertical direction are provided on the top of the fan housing (2).

2. A circulating fan mounting structure for a pit-type nitriding furnace according to claim 1, characterized in that: The impeller assembly (4) includes a telescopic shaft (41) that passes through the top wall of the fan housing (2). The telescopic shaft (41) is rotatably connected to the top wall of the fan housing (2). The top end of the telescopic shaft (41) is fixedly connected to the output shaft of the motor (3). The bottom end of the telescopic shaft (41) is fixedly connected to a mounting base (42). The bottom end of the mounting base (42) is fixedly connected to an impeller (43). A collar (44) is sleeved on the outside of the mounting base (42). The collar (44) is rotatably connected to the mounting base (42). A fixing frame (45) is fixedly connected to the outside of the collar (44). One end of the fixing frame (45) is fixedly connected to the inner wall of the fan housing (2).

3. A circulating fan mounting structure for a pit-type nitriding furnace according to claim 2, characterized in that: The vertical cross-section of the mounting base (42) is an "I" shaped structure.

4. The circulating fan mounting structure of a pit type nitriding furnace according to claim 2, characterized by: The telescopic shaft (41) includes a sleeve shaft (411), the top end of which is fixedly connected to the output shaft of the motor (3), and the bottom end of which is slidably connected to an insert shaft (412). The bottom end of the insert shaft (412) is fixedly connected to a mounting base (42). A limit strip (413) is fixedly connected to the outer side of the sleeve shaft (411), and the limit strip (413) is slidably connected to the inner wall of the sleeve shaft (411).

5. A circulating fan mounting structure for a pit-type nitriding furnace according to claim 4, characterized in that: The inner wall of the sleeve (411) is provided with a limiting groove (414) that matches the limiting strip (413), and the limiting strip (413) can slide along the limiting groove (414).

6. A circulating fan mounting structure for a pit-type nitriding furnace according to claim 1, characterized in that: The adjusting component (8) includes a fixed base (81) fixedly connected to the bottom of the furnace cover (1). A lead screw (84) is rotatably connected to the inner side of the fixed base (81). A slider (83) is threaded onto the lead screw (84). A handwheel (85) is fixedly connected to one end of the lead screw (84). A connecting rod (86) is hinged to the bottom end of the slider (83). A connecting rod (87) is hinged to the bottom end of the connecting rod (86). The bottom end of the connecting rod (87) is fixedly connected to the top wall of the fan housing (2).

7. A circulating fan mounting structure for a pit-type nitriding furnace according to claim 6, characterized in that: The bottom wall of the furnace cover (1) is fixedly connected to a guide rail (82) arranged parallel to the lead screw (84), and the top end of the guide rail (82) is slidably connected to the guide rail (82).

Images