A type of lever-type spring rotary level switch

Abstract

This utility model relates to the field of material level switch technology and discloses a lever-type spring-loaded rotary level switch. It includes a rotary level switch body, a rotating shaft at the lower part of the body, a connecting seat at the lower part of the rotating shaft, a connecting shaft at the lower part of the connecting seat, a rotating blade below the connecting shaft, a connecting plate at the lower part of the connecting shaft, and an elastic spring post between the connecting plate and the rotating blade. A positioning ring adapted to the lower side of the connecting shaft is provided, and an arc-shaped baffle connected to the positioning ring and adapted to the rotating blade is provided on the side of the rotating blade. An mounting plate fixedly installed to the inner wall of the storage tank is provided on the side of the connecting shaft, and a connecting unit is provided between the mounting plate and the positioning ring. In this utility model, the arc-shaped baffle blocks the rolling material, preventing the material from impacting the rotating blade, and the positioning ring positions the lower end of the connecting shaft, thus improving the service life and applicability of the lever-type spring-loaded rotary level switch.

Description

Technical Field

[0001] This utility model relates to the field of material level switch technology, specifically a rod-type spring-loaded rotary material level switch. Background Technology

[0002] The lever-type spring-loaded rotary level switch is one of the mainstream types of rotary level switches. Its core feature is the use of a lever-type extension structure to connect the blades, combined with a spring reset mechanism to achieve level detection: the motor drives the transmission shaft to rotate the lever assembly and blades. When the material accumulates to the point of contacting the blades, the blades stop rotating due to the resistance of the material. The transmission shaft overcomes the spring force to drive the trigger element to actuate, outputting a level signal. When the material falls and leaves the blades, the spring force drives the transmission shaft to reset, the blades resume rotation, and the signal is reset. Compared with ordinary rotary level switches, the lever structure can realize level detection in deep silos or special locations, and the spring reset mechanism simplifies the reset process. It is widely used in industrial production and warehousing.

[0003] A search revealed a patent, CN221238457U, which discloses a lever-type spring-loaded rotary level switch, comprising: a housing; a circuit assembly fixed to the housing; a rotary drive mechanism including a stator assembly and a rotor assembly for rotary output, wherein a torsion member is provided between the stator assembly and the circuit assembly, allowing the rotary drive mechanism to rotate relative to the circuit assembly and the housing; a triggering member fixed in position relative to the rotary drive mechanism for actuating the circuit assembly as the rotary drive mechanism rotates; and an actuating mechanism connected to the rotor assembly of the rotary drive mechanism, the actuating mechanism including at least a rotating shaft, a blade assembly, and an elastic component for connecting the rotating shaft and the blade assembly. This solution effectively reduces the possibility of damage to the rotating shaft and blade assembly.

[0004] The aforementioned patents have significant beneficial effects, but in practical application, they still have the following shortcomings: The aforementioned comparative documents reduce the frequency of damage to the rotary paddle level switch's shaft and blade assembly by incorporating an elastic component between the blades and the shaft. However, in reality, when the rotary paddle level switch is installed on the top wall of a storage tank, since most storage tanks have only one inlet located at its top, material accumulates and scatters after being conveyed into the tank. The material height away from the inlet is lower than the material accumulation height at the inlet. When the material comes into contact with the rotating blades, it exerts a downward impact and compressive force on the blades. The elastic component between the shaft and the rotating blades causes this impact and compressive force to cause the rotating blades to shift off-center from the shaft. Over time, this can lead to the breakage of the elastic component between the rotating blades and the shaft, thus reducing the service life of the spring-loaded rotary paddle level switch. Therefore, there is an urgent need in the art to improve the rotary paddle level switch to overcome the shortcomings of the prior art. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a rod-type spring-loaded rotary level switch, which improves the service life and application range of the rod-type spring-loaded rotary level switch.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lever-type spring-loaded rotary level switch, comprising a rotary level switch body, a rotating shaft at the lower part of the rotary level switch body, a connecting seat at the lower part of the rotating shaft, a connecting shaft at the lower part of the connecting seat, a rotating blade below the connecting shaft, a connecting plate at the lower part of the connecting shaft, an elastic spring post between the connecting plate and the rotating blade, a positioning ring adapted to the lower side of the connecting shaft, an arc-shaped baffle connected to the positioning ring and adapted to the rotating blade on the side of the rotating blade, an mounting plate fixedly installed to the inner wall of the storage tank on the side of the connecting shaft, and a connecting unit between the mounting plate and the positioning ring.

[0007] Preferably, the connecting unit includes a first connecting rod fixedly installed on one side of the positioning ring, a second connecting rod inserted into the first connecting rod fixedly installed on one side of the mounting plate, a threaded post passing through the first connecting rod fixedly installed on one end of the second connecting rod located inside the first connecting rod, an adjustment groove adapted to the threaded post being opened on the side of the first connecting rod, and a limit nut being threadedly connected to the side of the threaded post.

[0008] Preferably, a first rectangular limiting post in the shape of a rectangle is fixedly installed on the upper end of the connecting shaft, and a first limiting groove adapted to the first rectangular limiting post is provided at the lower part of the connecting seat. A stop post is fixedly installed on each opposite side of the first rectangular limiting post, and a slot adapted to the stop post is opened on each opposite side of the connecting seat. A limiting rod is provided on the inner side wall of the slot, and a moving groove adapted to the limiting rod is provided on the inner side wall of the slot. A compression spring adapted to the limiting rod is provided in the moving groove, and a pulling post is fixedly installed on one side of the limiting rod. A pulling groove adapted to the pulling post is opened on the side of the connecting seat.

[0009] Preferably, a second rectangular limiting post in the shape of a rectangle is fixedly connected to the upper part of the connecting shaft, and a second limiting groove adapted to the second rectangular limiting post is fixedly installed at the lower end of the connecting shaft. A countersunk hole is opened at the lower part of the connecting plate, and a bolt that penetrates the second rectangular limiting post and is threaded to the inner side wall of the second limiting groove is provided in the countersunk hole.

[0010] Preferably, the upper part of the rotating blade has a through hole, which is adapted to fit a bolt.

[0011] Preferably, a plurality of elastic connecting columns are fixedly installed between the connecting plate and the rotating blade, and the elastic connecting columns are elastic.

[0012] Preferably, a bearing is fixedly installed inside the positioning ring, and the bearing is sleeved on the side of the connecting shaft.

[0013] To address the shortcomings of existing technologies, this utility model provides a rod-type spring-loaded rotary level switch, overcoming the deficiencies of the prior art. The beneficial effects of this utility model are as follows: In this invention, an arc-shaped baffle blocks the rolling material, preventing it from impacting the rotating blades, and a positioning ring positions the lower end of the connecting shaft, thus improving the service life and applicability of the rod-type spring-loaded rotary level switch.

[0014] In this utility model, a first rectangular limiting post is inserted into a first limiting groove, and a limiting rod limits the stop post, which facilitates the installation of the connecting shaft and the connecting seat and subsequent replacement.

[0015] In this invention, a second rectangular limiting post is inserted into a second limiting groove and installed with bolts, which facilitates the installation or later replacement of the rotating blade and the connecting shaft.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the rotating blade in this utility model; Figure 3 This is a partial cross-sectional view of the connecting seat in this utility model. Figure 4 This is a cross-sectional structural diagram of the positioning ring in this utility model; Figure 5 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 6 for Figure 3 Enlarged structural diagram at point B; Figure 7 for Figure 4 Enlarged structural diagram at point C.

[0019] In the diagram: 1. Rotary paddle level switch body; 2. Rotating shaft; 3. Connecting seat; 4. Connecting shaft; 5. Rotating blade; 6. Connecting plate; 7. Spring post; 8. Positioning ring; 9. Mounting plate; 10. First connecting rod; 11. Second connecting rod; 12. Threaded post; 13. Adjusting groove; 14. Limit nut; 15. First rectangular limit post; 16. First limit groove; 17. Stop post; 18. Slot; 19. Limiting rod; 20. Moving groove; 21. Compression spring; 22. Pulling post; 23. Pulling groove; 24. Second rectangular limit post; 25. Second limit groove; 26. Bolt; 27. Countersunk hole; 28. Through hole; 29. ​​Elastic connecting post; 30. Bearing; 31. Arc-shaped baffle. Detailed Implementation

[0020] 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.

[0021] Example 1 Please see Figures 1-7 A lever-type spring-loaded rotary level switch includes a rotary level switch body 1, a rotating shaft 2 at the lower part of the body 1, a connecting seat 3 at the lower part of the rotating shaft 2, a connecting shaft 4 at the lower part of the connecting seat 3, a rotating blade 5 below the connecting shaft 4, a connecting plate 6 at the lower part of the connecting shaft 4, an elastic spring post 7 between the connecting plate 6 and the rotating blade 5, a positioning ring 8 adapted to the lower side of the connecting shaft 4, an arc-shaped baffle 31 connected to the positioning ring 8 and adapted to the rotating blade 5 on the side of the rotating blade 5, and an mounting plate 9 fixedly installed to the inner wall of the storage tank on the side of the connecting shaft 4, with a connecting strip between the mounting plate 9 and the positioning ring 8. The connecting unit includes a first connecting rod 10 fixedly installed on one side of the positioning ring 8, a second connecting rod 11 fixedly installed on one side of the mounting plate 9 and inserted into the first connecting rod 10, a threaded post 12 that passes through the first connecting rod 10 fixedly installed on the side of the second connecting rod 11 located inside the first connecting rod 10, an adjustment groove 13 adapted to the threaded post 12 is opened on the side of the first connecting rod 10, a limit nut 14 is threadedly connected to the side of the threaded post 12, a number of elastic connecting posts 29 are fixedly installed between the connecting plate 6 and the rotating blade 5, the elastic connecting posts 29 are elastic, a bearing 30 is fixedly installed inside the positioning ring 8, and the bearing 30 is sleeved on the side of the connecting shaft 4.

[0022] The specific implementation method in this embodiment is as follows: The rotary paddle level switch body 1 described above is a known prior art. The rotary paddle level switch body 1 is equipped with a motor and a spring reset mechanism. The motor drives the rotating shaft 2 to rotate the connecting shaft 4 and the rotating blade 5. When the material accumulates to the point of contacting the rotating blade 5, the rotating blade 5 stops rotating due to the resistance of the material. The connecting shaft 4 overcomes the spring force to drive the trigger element to move and output a material level arrival signal. When the material falls and leaves the blade, the spring force drives the connecting shaft 4 to reset, the rotating blade 5 resumes rotation, and the signal is reset.

[0023] When installing the rotary paddle level switch, the switch is installed according to the installation position and material level of the storage tank. The main body 1 of the rotary paddle level switch is installed on the upper end of the storage tank, the connecting shaft 4 is located inside the storage tank, and the mounting plate 9 is installed on the inner side wall of the storage tank with fasteners. The positioning ring 8 and the bearing 30 are located on the side of the connecting shaft 4. The bearing 30 facilitates the rotation of the connecting shaft 4. The position of the connecting shaft 4 can be adjusted between the second connecting rod 11 and the first connecting rod 10. During adjustment, the threaded post 12 moves in the adjusting groove 13. After adjusting the position between the first connecting rod 10 and the second connecting rod 11, the limiting nut 14 threaded to the side of the threaded post 12 is locked. The position between the second connecting rod 10 and the second connecting rod 11 is fixed. The material is input through the feed port. When the material rolls diagonally downward and is about to contact the rotating blade 5, the material will first be blocked by the arc-shaped baffle 31 to prevent the material from impacting the rotating blade 5. Also, because the positioning ring 8 and the bearing 30 position the connecting shaft 4, the connecting shaft 4 is prevented from deforming. At the same time, the positioning ring 8 can be adjusted up and down on the side of the connecting shaft 4. The position of the mounting plate 9 can also be adjusted and fixed. The height position between the arc-shaped baffle 31 and the rotating blade 5 can be adjusted, which improves the service life and application range of the rod-type spring-loaded rotary level switch. In addition, the elastic connecting column 29 is elastic, which improves the connection strength between the rotating blade 5 and the connecting plate 6.

[0024] Example 2 Please see Figure 6 This embodiment includes the above embodiment, and further includes: a first rectangular limiting post 15 in the shape of a rectangle is fixedly installed on the upper end of the connecting shaft 4; a first limiting groove 16 adapted to the first rectangular limiting post 15 is provided at the lower part of the connecting seat 3; a stop post 17 is fixedly installed on the opposite side of the first rectangular limiting post 15; a slot 18 adapted to the stop post 17 is opened on the opposite side of the connecting seat 3; a limiting rod 19 is provided on the inner side wall of the slot 18; a moving groove 20 adapted to the limiting rod 19 is provided on the inner side wall of the slot 18; a compression spring 21 adapted to the limiting rod 19 is provided in the moving groove 20; a pulling post 22 is fixedly installed on one side of the limiting rod 19; and a pulling groove 23 adapted to the pulling post 22 is opened on the side of the connecting seat 3.

[0025] In this embodiment, the specific implementation method is as follows: When it is necessary to connect the connecting shaft 4 and the connecting seat 3, by pushing the pulling column 22, the pulling column 22 moves within the pulling groove 23, and the pulling column 22 drives the limiting rod 19 to move within the moving groove 20. The limiting rod 19 compresses the compression spring 21, and the limiting rod 19 fully enters the moving groove 20. The first rectangular limiting column 15 at the upper end of the connecting shaft 4 is inserted into the first limiting groove 16, and the stop column 17 is inserted into the slot 18. When the pulling column 22 is released, the tension of the compression spring 21 pushes the limiting rod 19 to move, and the limiting rod 19 blocks the stop column 17, which facilitates the connection between the connecting shaft 4 and the connecting seat 3. At the same time, it is convenient to replace the connecting shaft 4 of different lengths, thereby improving the monitoring range of the material position of the material level switch.

[0026] Example 3 Please see Figure 4 and Figure 7 This embodiment includes all the above embodiments, and further includes: a second rectangular limiting post 24 in the shape of a rectangle is fixedly connected to the upper part of the connecting shaft 4, a second limiting groove 25 adapted to the second rectangular limiting post 24 is fixedly installed at the lower end of the connecting shaft 4, a countersunk hole 27 is opened at the lower part of the connecting plate 6, a bolt 26 is provided in the countersunk hole 27 that penetrates the second rectangular limiting post 24 and is threaded to the inner side wall of the second limiting groove 25 at one end, and a through hole 28 is opened at the upper part of the rotating blade 5, and the through hole 28 is adapted to the bolt 26.

[0027] In this embodiment, the specific implementation method is as follows: When connecting the connecting shaft 4 and the rotating blade 5, the second rectangular limiting post 24 is inserted into the second limiting groove 25, and the bolt 26 is inserted through the through hole 28. One end of the bolt 26 passes through the countersunk hole 27 and the second rectangular limiting post 24, and the other end of the bolt 26 is threadedly connected to the connecting shaft 4. This connection of the rotating blade 5 and the connecting shaft 4 facilitates the connection and installation of the connecting shaft 4 and the rotating blade 5, and allows for the replacement of connecting shafts 4 of different lengths.

[0028] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rod spring anti-swing level switch comprising an anti-swing level switch body (1), characterized in that, The main body (1) of the rotary level switch is provided with a rotating shaft (2) at the bottom, a connecting seat (3) at the bottom of the rotating shaft (2), a connecting shaft (4) at the bottom of the connecting seat (3), a rotating blade (5) at the bottom of the connecting shaft (4), a connecting plate (6) at the bottom of the connecting shaft (4), an elastic spring column (7) between the connecting plate (6) and the rotating blade (5), a positioning ring (8) adapted to the lower side of the connecting shaft (4), an arc-shaped baffle (31) connected to the positioning ring (8) and adapted to the rotating blade (5) on the side of the rotating blade (5), an mounting plate (9) fixedly installed to the inner wall of the storage tank on the side of the connecting shaft (4), and a connecting unit between the mounting plate (9) and the positioning ring (8).

2. The rod-type spring-loaded rotary level switch according to claim 1, characterized in that, The connecting unit includes a first connecting rod (10) fixedly installed on one side of the positioning ring (8), and a second connecting rod (11) inserted into the first connecting rod (10) fixedly installed on one side of the mounting plate (9). A threaded post (12) penetrating the first connecting rod (10) is fixedly installed on one side of the second connecting rod (11) located inside the first connecting rod (10). An adjustment groove (13) adapted to the threaded post (12) is opened on the side of the first connecting rod (10), and a limit nut (14) is threadedly connected to the side of the threaded post (12).

3. The rod-type spring-loaded rotary level switch according to claim 1, characterized in that, The upper end of the connecting shaft (4) is fixedly installed with a first rectangular limiting post (15) in the shape of a rectangle. The lower part of the connecting seat (3) is provided with a first limiting groove (16) that is adapted to the first rectangular limiting post (15). The opposite sides of the first rectangular limiting post (15) are fixedly installed with a stop post (17). The opposite sides of the connecting seat (3) are provided with a slot (18) that is adapted to the stop post (17). The inner side wall of the slot (18) is provided with a limiting rod (19). The inner side wall of the slot (18) is provided with a moving groove (20) that is adapted to the limiting rod (19). The moving groove (20) is provided with a compression spring (21) that is adapted to the limiting rod (19). A pulling post (22) is fixedly installed on one side of the limiting rod (19). The side of the connecting seat (3) is provided with a pulling groove (23) that is adapted to the pulling post (22).

4. The rod-type spring-loaded rotary level switch according to claim 1, characterized in that, The upper part of the connecting shaft (4) is fixedly connected to a second rectangular limiting post (24) in the shape of a rectangle. The lower end of the connecting shaft (4) is fixedly installed with a second limiting groove (25) that is adapted to the second rectangular limiting post (24). The lower part of the connecting plate (6) is provided with a countersunk hole (27). The countersunk hole (27) is provided with a bolt (26) that passes through the second rectangular limiting post (24) and is threaded to the inner side wall of the second limiting groove (25) at one end.

5. A rod-type spring-loaded rotary level switch according to claim 4, characterized in that, The rotating blade (5) has a through hole (28) on its upper part, and the through hole (28) is adapted to the bolt (26).

6. A rod-type spring-loaded rotary level switch according to claim 1, characterized in that, A plurality of elastic connecting columns (29) are fixedly installed between the connecting plate (6) and the rotating blade (5), and the elastic connecting columns (29) are elastic.

7. A rod-type spring-loaded rotary level switch according to claim 1, characterized in that, A bearing (30) is fixedly installed inside the positioning ring (8), and the bearing (30) is sleeved on the side of the connecting shaft (4).

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