High-low speed timing automatic change-over switch of flue-cured tobacco bulk curing barn fan

Abstract

The utility model discloses a flue-cured tobacco bulk curing barn fan high and low speed timing automatic change-over switch, which belongs to the technical field of control switches, and comprises a switch shell, a left chamber, a middle chamber and a right chamber are arranged in the switch shell, the inner side of the middle chamber is rotatably connected with a movable shaft through a bearing, and the movable shaft is connected with the right chamber through a bearing. The adjusting assembly is arranged in the right cavity and used for enabling the bearing disc to automatically deflect after the bearing disc is rotated, then different circuits on the conversion circuit board are connected with a circuit on the central control circuit board through the connecting protruding points, the driving motor is arranged in the left cavity, and the driving motor is driven by the driving motor to drive the central control circuit board to rotate. The driving motor drives the bearing disc to deflect and move through the driving assembly, meanwhile, the push-pull block can be used for driving the extension rod to deflect and move the bearing disc, the contact stability of the conversion circuit board and the central control circuit board is guaranteed, and the situation that the rotating speed cannot be adjusted after an internal circuit of a traditional switch breaks down is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of control switches, in particular to a high-low speed timing automatic conversion switch for a flue-cured tobacco bulk curing barn fan. Background Technique

[0002] The flue-cured tobacco bulk curing barn adopts mechanical heat supply and moisture exhaust. The loading chamber and the heating chamber are independent. It is necessary to transport the heat of the heating chamber to the loading chamber mechanically to complete the tobacco leaf baking process. During the actual baking process, in the early yellowing stage and the late dry rib stage, the main function of the fan is to transport heat to the loading chamber, and the moisture exhaust function is secondary. At this time, if the fan runs at high speed for a long time, more heat will be lost and the baking cost will increase. We need to convert the fan speed between high and low speeds to achieve the purpose of both transporting heat and meeting moisture exhaust and reducing heat loss.

[0003] The traditional timing conversion switch is controlled by an internal control circuit board. By adjusting the magnitude of the current frequency, the purpose of converting the fan speed between high and low is achieved, so as to realize the mutual conversion of the air volume of the curing barn fan, and achieve the purpose of both transporting heat to ensure the temperature required by the curing barn and meeting the requirement of discharging a certain amount of moisture and reducing heat loss. However, for a control switch using a pure circuit, once a local circuit inside the control switch fails, the adjustment of the fan speed cannot be realized, which is likely to affect the quality of flue-cured tobacco in the curing barn. Content of the Utility Model

[0004] The purpose of the utility model is to provide a high-low speed timing automatic conversion switch for a flue-cured tobacco bulk curing barn fan. By integrating two speed regulation methods of manual adjustment and mechanical automatic adjustment inside the switch housing, after a failure occurs in the internal circuit of the switch, the circuit can be manually controlled to switch the speed of the fan quickly or slowly, so as to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A high-low speed timing automatic conversion switch for a flue-cured tobacco bulk curing barn fan, including a switch housing. Inside the switch housing, there are a left chamber, a middle chamber and a right chamber. The inner side of the middle chamber is rotatably connected with a movable shaft through a bearing. A bearing plate is fixed on the outer side of the movable shaft. A central control circuit board is installed on the back of the inner cavity of the middle chamber. A conversion circuit board is installed on the surface of the bearing plate. Connection bumps in contact with the central control circuit board are arranged on the surface of the conversion circuit board. One end of the movable shaft penetrates into the right chamber. An adjusting component for deflecting and adjusting the bearing plate is arranged in the right chamber. A driving motor is installed inside the left chamber. A driving component for deflecting and moving the bearing plate is installed on the output shaft of the driving motor. An extension rod is fixed on the front side of the bearing plate. A through groove is opened at the front end of the switch housing. The extension rod penetrates through the through groove and extends to the outside of the switch housing and is fixed with a push-pull block.

[0006] Preferably, the adjusting component includes a fixing frame fixed on the outer side of the movable shaft. A fixing column is fixed on the inner side of the bottom of the fixing frame. A supporting column is slidably connected to the outer side of the fixing column. A sliding seat is fixed on the bottom of the inner cavity of the right chamber. A slider is fixed on the bottom of the supporting column. The bottom of the slider is attached to the bottom of the inner cavity of the sliding seat. A supporting spring is sleeved on the outer side of the supporting column. The supporting spring is located between the slider and the fixing column. A limiting column is also fixed inside the right chamber. The fixing frame is located between the two limiting columns.

[0007] Preferably, the driving component includes a deflecting frame fixed at the end of the output shaft of the driving motor. Two dial rods are fixed on the side of the deflecting frame away from the driving motor. Two sliding grooves are formed on the left side of the bearing disc. The side of the dial rod away from the deflecting frame penetrates through to the inner cavity of the sliding groove.

[0008] Preferably, a guiding groove is formed between the left chamber and the middle chamber. The dial rod is slidably connected in the guiding groove.

[0009] Preferably, a gasket is sleeved on the outer side of the supporting column. One end of the supporting spring is fixed on the outer side of the gasket. The other side of the supporting spring is fixed on the surface of the slider. The gasket is attached to the outer side of the fixing column.

[0010] Preferably, a vertical groove is formed on the top of the supporting column. The fixing column is located in the vertical groove.

[0011] Preferably, an arc-shaped baffle is fixed on the outer side of the extension rod. The arc-shaped baffle is attached to the inner wall of the middle chamber.

[0012] Preferably, a display screen is embedded at the bottom of the front end of the switch housing. An operation keyboard is arranged on the right side of the display screen. Both the display screen and the operation keyboard are electrically connected to the central control circuit board.

[0013] Preferably, connecting screws are threadedly connected to both the bottom and the top of the back of the switch housing. The connecting screws are electrically connected to the central control circuit board.

[0014] Preferably, prompt signs are arranged on both the top and the bottom of the front end of the switch housing. The positions of the prompt signs correspond to those of the conversion circuit board.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] The utility model sets an adjusting component inside the right chamber, which is used to automatically deflect the bearing disc after rotating the bearing disc, and then connect different circuits on the conversion circuit board with the circuits on the central control circuit board through connecting bumps. A driving motor is arranged inside the left chamber, and the driving motor drives the bearing disc to deflect and move through a driving component. At the same time, the bearing disc can also be deflected and moved by using a push-pull block to drive an extension rod, ensuring the stability of the contact between the conversion circuit board and the central control circuit board, and avoiding the inability to adjust the rotation speed after a failure occurs in the internal circuit of the traditional switch.

[0017] Through the setting of the gasket in the utility model, the support of the support spring for the support column is ensured, so that the fixed frame deflects to one side under the support of the support column and remains stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 is a three-dimensional structural schematic diagram of a side sectional view of the right chamber of the utility model;

[0020] Figure 3 is a three-dimensional structural schematic diagram of a side sectional view of the middle chamber of the utility model;

[0021] Figure 4 is a three-dimensional structural schematic diagram of a side sectional view of the left chamber of the utility model;

[0022] Figure 5 is a three-dimensional structural schematic diagram of a partial adjusting component and a bearing disc of the utility model;

[0023] Figure 6 is a three-dimensional structural schematic diagram of a driving component and a bearing disc of the utility model.

[0024] Reference numerals in the figure: 1, switch housing; 2, left chamber; 3, middle chamber; 4, right chamber; 5, movable shaft; 6, bearing disc; 7, central control circuit board; 8, conversion circuit board; 9, connecting bump; 10, adjusting component; 101, fixed frame; 102, fixed column; 103, support column; 104, sliding seat; 105, slider; 106, support spring; 107, limit column; 11, driving motor; 12, driving component; 121, deflecting frame; 122, lever; 123, chute; 13, extension rod; 14, push-pull block; 15, guide groove; 16, gasket; 17, vertical groove; 18, arc-shaped baffle; 19, display screen; 20, operation keyboard; 21, connecting screw; 22, prompt sign. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] The present invention provides a high-low speed timing automatic conversion switch for a flue-cured tobacco bulk curing barn fan as shown in Figures 1 to 6 Figure [not provided]. The switch includes a switch housing 1. Inside the switch housing 1, there are a left chamber 2, a middle chamber 3, and a right chamber 4. The inner side of the middle chamber 3 is rotatably connected to a movable shaft 5 through a bearing. A bearing plate 6 is fixed on the outer side of the movable shaft 5. A central control circuit board 7 is installed on the back of the inner cavity of the middle chamber 3. A conversion circuit board 8 is installed on the surface of the bearing plate 6. Connection bumps 9 that contact the central control circuit board 7 are arranged on the surface of the conversion circuit board 8. One end of the movable shaft 5 penetrates into the interior of the right chamber 4. An adjusting assembly 10 for deflecting and adjusting the bearing plate 6 is arranged in the right chamber 4. A driving motor 11 is installed inside the left chamber 2. A driving assembly 12 for deflecting and moving the bearing plate 6 is installed on the output shaft of the driving motor 11. An extension rod 13 is fixed on the front side of the bearing plate 6. A through groove is formed at the front end of the switch housing 1. The extension rod 13 penetrates through the through groove and extends to the outside of the switch housing 1 and is fixed with a push-pull block 14.

[0027] By arranging an adjusting assembly 10 inside the right chamber 4, after the bearing plate 6 is rotated, the bearing plate 6 can automatically deflect, and then different circuits on the conversion circuit board 8 are connected to the circuits on the central control circuit board 7 through the connection bumps 9. A driving motor 11 is arranged inside the left chamber 2. The driving motor 11 drives the bearing plate 6 to deflect and move through the driving assembly 12. At the same time, the push-pull block 14 can also be used to drive the extension rod 13 to deflect and move the bearing plate 6, ensuring the stability of the contact between the conversion circuit board 8 and the central control circuit board 7 and avoiding the inability to adjust the rotation speed after a failure occurs in the internal circuit of the traditional switch.

[0028] It should be noted that in the original text, there is a reference to "as shown in " without a specific figure number provided. In the translation, it is translated as "as shown in Figure [not provided]" to maintain the consistency with the original text's lack of specific figure reference. Also, the 7-digit tags to

[0028] are preserved as they are.The adjusting assembly 10 includes a fixing bracket 101 fixed outside the movable shaft 5. Inside the bottom of the fixing bracket 101, a fixing column 102 is fixed. A support column 103 is slidably connected to the outside of the fixing column 102. At the bottom of the inner cavity of the right chamber 4, a sliding seat 104 is fixed. At the bottom of the support column 103, a slider 105 is fixed. The bottom of the slider 105 is attached to the bottom of the inner cavity of the sliding seat 104. A support spring 106 is sleeved on the outside of the support column 103. The support spring 106 is located between the slider 105 and the fixing column 102. Inside the right chamber 4, a limiting column 107 is also fixed. The fixing bracket 101 is located between the two limiting columns 107. By arranging the support spring 106 between the slider 105 and the fixing column 102, it is convenient to drive the support column 103 to slide outward on the outside of the fixing column 102, and at the same time support and limit one end of the fixing bracket 101, so that the bearing plate 6 can quickly deflect to one side under the cooperation of the movable shaft 5 and is supported by the support spring 106 to ensure stability after deflection.

[0029] The driving assembly 12 includes a deflection bracket 121 fixed at the end of the output shaft of the driving motor 11. On the side of the deflection bracket 121 away from the driving motor 11, two toggle levers 122 are fixed. Two chute grooves 123 are opened on the left side of the bearing plate 6. The side of the toggle lever 122 away from the deflection bracket 121 penetrates into the inner cavity of the chute groove 123. By driving the deflection bracket 121 to rotate by the driving motor 11, and then driving the bearing plate 6 to rotate while the toggle lever 122 slides in the chute groove 123, different circuits on the conversion circuit board 8 are connected to the circuits on the central control circuit board 7 to realize the adjustment of the current frequency.

[0030] A guiding groove 15 is opened between the left chamber 2 and the middle chamber 3. The toggle lever 122 is slidably connected in the guiding groove 15. Through the setting of the guiding groove 15, it is convenient to guide the toggle lever 122 and ensure that the deflection bracket 121 and the toggle lever 122 drive the bearing plate 6 to rotate.

[0031] A gasket 16 is sleeved on the outside of the support column 103. One end of the support spring 106 is fixed on the outside of the gasket 16, and the other side of the support spring 106 is fixed on the surface of the slider 105. The gasket 16 is attached to the outside of the fixing column 102. Through the setting of the gasket 16, it is convenient to support the support spring 106 and ensure the stability between the support spring 106 and the fixing column 102.

[0032] A vertical groove 17 is opened at the top of the support column 103. The fixing column 102 is located in the vertical groove 17. Through the setting of the vertical groove 17, it is convenient for the fixing column 102 to slide in the brush groove, and the position of the slider 105 is adjusted under the limitation of the fixing column 102 by the support column 103.

[0033] An arc-shaped baffle 18 is fixed to the outer side of the extension rod 13. The arc-shaped baffle 18 fits against the inner wall of the middle chamber 3. Through the arrangement of the arc-shaped baffle 18, it is convenient to block the through groove and prevent the middle chamber 3 from communicating with the outside.

[0034] A display screen 19 is embedded at the bottom of the front end of the switch housing 1. An operation keyboard 20 is arranged on the right side of the display screen 19. Both the display screen 19 and the operation keyboard 20 are electrically connected to the central control circuit board 7. Through the arrangement of the operation keyboard 20, in cooperation with the display screen 19, the switch parameters are set to realize the conversion of the switch by the driving motor 11 at a fixed time.

[0035] Connecting screws 21 are threadedly connected to both the bottom and the top of the back surface of the switch housing 1. The connecting screws 21 are electrically connected to the central control circuit board 7. Through the arrangement of the connecting screws 21, it is convenient to electrically connect the external circuit to the central control circuit board 7 through the connecting screws 21, and it is convenient to control the fan of the flue-cured tobacco bulk curing barn through the switch.

[0036] Prompt signs 22 are arranged on both the top and the bottom of the front end of the switch housing 1. The positions of the prompt signs 22 correspond to those of the conversion circuit board 8. Through the arrangement of the prompt signs 22, it is convenient to ensure the accuracy of the operation when manually operating the switch.

[0037] During specific use, the parameters of the switch are set through the control keyboard and the display screen 19, and the conversion of the switch is realized at a fixed time. During automatic switching, the driving motor 11 drives the deflection frame 121 to rotate, and then the deflection frame 121 drives the lever 122 to slide in the guide groove 15 and the sliding groove 123. Then the lever 122 drives the bearing plate 6 to rotate around the movable shaft 5. Then the movable shaft 5 drives the fixed frame 101 to deflect, so that the fixed column 102 slides in the vertical groove 17, and then the support spring 106 is compressed. At the same time, the support column 103 deflects around the fixed column 102 at the bottom of the fixed frame 101. When the support column 103 deflects to the other side, the support quickly drives the support column 103 and the slider 105 to deflect to the other side, so that the fixed frame 101 deflects to the other side. At the same time, the conversion circuit board 8 on the bearing plate 6 fits against the central control circuit board 7 and deflects, so that different circuits on the conversion circuit board 8 are connected to the circuits on the central control circuit board 7, realizing the change of the current frequency, controlling the fan, and realizing the switching between high and low speeds. When a local circuit on the central control circuit board 7 fails and the switch cannot be regulated through the driving motor 11, the extension rod 13 can be driven by the push-pull block 14 to rotate the bearing plate 6, realizing the switching of the circuits of the conversion circuit board 8 and the central control circuit board 7.

[0038] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic conversion switch for high and low speed timing of a blower in a flue-cured tobacco bulk curing barn, comprising a switch housing (1), characterized in that: Inside the switch housing (1), a left chamber (2), a middle chamber (3), and a right chamber (4) are provided. Inside the middle chamber (3), a movable shaft (5) is rotatably connected by a bearing. A bearing plate (6) is fixed to the outer side of the movable shaft (5). A central control circuit board (7) is installed on the back surface of the inner cavity of the middle chamber (3). A conversion circuit board (8) is installed on the surface of the bearing plate (6). Connection bumps (9) that contact the central control circuit board (7) are provided on the surface of the conversion circuit board (8). One end of the movable shaft (5) penetrates into the interior of the right chamber (4). An adjustment assembly (10) for deflecting and adjusting the bearing plate (6) is provided inside the right chamber (4). A drive motor (11) is installed inside the left chamber (2). A drive assembly (12) for deflecting and moving the bearing plate (6) is installed on the output shaft of the drive motor (11). An extension rod (13) is fixed to the front side of the bearing plate (6). A through groove is formed at the front end of the switch housing (1). The extension rod (13) penetrates through the through groove and extends to the outside of the switch housing (1) and is fixed with a push-pull block (14).

2. The automatic conversion switch for high and low speed timing of the fan in a flue-cured tobacco bulk curing barn according to claim 1, wherein: The adjustment assembly (10) includes a fixing frame (101) fixed to the outer side of the movable shaft (5). A fixing column (102) is fixed to the inner side of the bottom of the fixing frame (101). A support column (103) is slidably connected to the outer side of the fixing column (102). A sliding seat (104) is fixed to the bottom of the inner cavity of the right chamber (4). A slider (105) is fixed to the bottom of the support column (103). The bottom of the slider (105) fits with the bottom of the inner cavity of the sliding seat (104). A support spring (106) is sleeved on the outer side of the support column (103). The support spring (106) is located between the slider (105) and the fixing column (102). A limiting column (107) is also fixed inside the right chamber (4). The fixing frame (101) is located between the two limiting columns (107).

3. An automatic conversion switch for high and low speed timing of a fan in a flue-cured tobacco bulk curing barn according to claim 1, characterized in that: The drive assembly (12) includes a deflection frame (121) fixed to the end of the output shaft of the drive motor (11). Two toggle levers (122) are fixed to the side of the deflection frame (121) away from the drive motor (11). Two chute grooves (123) are formed on the left side of the bearing plate (6). The side of the toggle lever (122) away from the deflection frame (121) penetrates into the inner cavity of the chute groove (123).

4. An automatic high-low speed timing conversion switch for a flue-cured tobacco bulk curing barn fan according to claim 3, characterized in that: A guiding groove (15) is formed between the left chamber (2) and the middle chamber (3). The toggle lever (122) is slidably connected inside the guiding groove (15).

5. An automatic high-low speed timing conversion switch for a flue-cured tobacco bulk curing barn according to claim 2, characterized in that: A gasket (16) is sleeved on the outer side of the support column (103). One end of the support spring (106) is fixed to the outer side of the gasket (16). The other side of the support spring (106) is fixed to the surface of the slider (105). The gasket (16) fits on the outer side of the fixing column (102).

6. The high-low speed timing automatic conversion switch of a flue-cured tobacco bulk curing barn fan according to claim 2, characterized in that: A vertical groove (17) is formed at the top of the support column (103). The fixing column (102) is located inside the vertical groove (17).

7. An automatic conversion switch for high and low speed timing of a fan in a flue-cured tobacco bulk curing barn according to claim 2, characterized in that: An arc-shaped baffle (18) is fixed to the outer side of the extension rod (13), and the arc-shaped baffle (18) is attached to the inner wall of the middle chamber (3).

8. An automatic high-low speed timing conversion switch for a fan of a flue-cured tobacco bulk curing barn according to claim 1, characterized in that: A display screen (19) is embedded at the bottom of the front end of the switch housing (1), an operation keyboard (20) is arranged on the right side of the display screen (19), and both the display screen (19) and the operation keyboard (20) are electrically connected to the central control circuit board (7).

9. An automatic high-low speed timing conversion switch for a fan in a flue-cured tobacco bulk curing barn according to claim 1, characterized in that: Connecting screws (21) are screwed at both the bottom and the top of the back surface of the switch housing (1), and the connecting screws (21) are electrically connected to the central control circuit board (7).

10. A high-low speed timing automatic conversion switch for a flue-cured tobacco bulk curing barn according to claim 1, characterized in that: Prompt signs (22) are arranged at both the top and the bottom of the front end of the switch housing (1), and the positions of the prompt signs (22) correspond to those of the conversion circuit board (8).

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