Resistance rotation material level switch

Abstract

The utility model discloses a rotation-resistant material level switch, which relates to the field of material level switches and comprises a shell assembly, a connecting assembly, a material probing assembly, a driving assembly, a detection sensing assembly, a wire passing assembly and a sealing assembly. The shell assembly comprises a shell and a rear cover installed at one end of the shell. The connecting assembly comprises a mounting base mounted at the end, away from the rear cover, of the shell, and a mounting hole penetrates through the middle of the mounting base. The material probing assembly comprises a rotating rod inserted and installed in the installation hole and a blade connected to the end, away from the installation base, of the rotating rod. By adding the detection induction assembly and the magnet at the lower end of the motor, whether the motor breaks down or not can be detected; meanwhile, the feeding position and the discharging position are arranged and can be installed at the bottom or the top of a hopper respectively, and the positions can be flexibly changed in actual use; the installation seat and the rotating rod are sealed through the rubber sealing piece, the ultra-strong dustproof sealing effect can be guaranteed, and the Hall switch is installed in the shell and can be used for detecting the state of the motor in real time.

Description

Technical Field

[0001] The utility model relates to the field of material level switches, in particular to a rotary paddle material level switch. Background Art

[0002] In the process of production line or logistics automation, material level control of silo is an indispensable part of automatic control.

[0003] The most widely used silo level sensor at present is the rotary resistance level sensor, or rotary resistance level switch, which usually includes a sensing device and a level detection piece. When the level detection piece rotates, if it encounters resistance, the sensing device can determine whether it encounters material and determine the height of the material level based on the size of the resistance and the rotation position of the level detection piece.

[0004] However, in actual use, the existing rotary paddle level switch still has some problems. For example, the existing rotary paddle level switch lacks a motor detection mechanism and cannot detect whether the motor is faulty, resulting in material waste and safety accidents in real scenarios. Utility Model Content

[0005] Purpose of the utility model: In view of the above shortcomings, the utility model provides a rotary paddle level switch to solve the above problems existing in the prior art.

[0006] Technical solution: A rotary paddle level switch, comprising a housing assembly, a connection assembly, a material detection assembly, a drive assembly, a detection sensor assembly, a wire assembly and a sealing assembly;

[0007] Among them, the shell assembly includes a shell and a back cover installed at one end of the shell; the connection assembly includes a mounting base installed at the end of the shell away from the back cover, and a mounting hole is opened through the middle of the mounting base; the material detection assembly includes a rotating rod inserted and installed in the mounting hole, and a blade connected to the end of the rotating rod away from the mounting base; the driving assembly includes a motor installed at a predetermined position in the shell, and the motor driving end is connected to the end of the rotating rod away from the blade; the detection sensing assembly includes a magnet arranged at the lower end of the motor, and a Hall switch arranged at a predetermined position in the shell, which is used to detect the state of the motor; the wire passing assembly includes a terminal installed at a predetermined position on the shell for wire passing; the sealing assembly is used to seal and protect the corresponding components.

[0008] In a further embodiment, the present application further comprises a ground terminal and a plug;

[0009] Among them, the grounding terminal is installed at a predetermined position on the shell to protect the switch as a whole and personal safety; the plug is set at a predetermined position on the shell to protect the switch as a whole.

[0010] In a further embodiment, the connection assembly further comprises a second bearing and a first bearing;

[0011] Among them, the second bearing is installed between the inner wall of the mounting hole and the rotating rod and is arranged close to one side of the blade, and is used for rotationally connecting the mounting seat and the rotating rod; the first bearing is installed between the inner wall of the mounting hole and the rotating rod and is located between the second bearing and the motor, and is used to cooperate with the second bearing to make the mounting seat and the rotating rod rotationally connected.

[0012] In a further embodiment, an embedding groove adapted to the blade is formed at one end of the rotary rod away from the mounting seat, and the blade is clamped to the rotary rod through the embedding groove. Pin holes connected to the embedding groove are correspondingly penetrated on the rotary rod and the blade, and mounting pins for fixing the blade and the rotary rod are adapted to be installed in the pin holes.

[0013] In a further embodiment, the sealing assembly includes a sealing member and a sealing support member;

[0014] Wherein, the sealing member is arranged between the rotary rod and the inner wall of the mounting hole and is located on the side of the second bearing away from the first bearing; the sealing support member is installed between the sealing member and the inner wall of the mounting hole for supporting and installing the sealing member.

[0015] In a further embodiment, the sealing assembly further comprises a second O-ring, a retaining ring and a first O-ring;

[0016] Among them, the second O-ring is arranged at the connection between the mounting seat and the shell; the retaining ring is arranged at the connection between the mounting seat and the shell and is located on the side of the second O-ring close to the motor; the first O-ring is arranged at the connection between the mounting seat and the shell and is located on the side of the second O-ring away from the retaining ring, which is used to cooperate with the retaining ring and the second O-ring to seal and protect the connection between the mounting seat and the shell.

[0017] In a further embodiment, the sealing assembly further comprises a sealing gasket;

[0018] Wherein, a sealing gasket is arranged at the connection between the back cover and the shell, and is used for sealing and protecting the connection between the back cover and the shell.

[0019] In a further embodiment, the sealing assembly further comprises a third O-ring;

[0020] Wherein, a third O-ring is arranged at the connection between the plug and the shell, and is used for sealing and protecting the connection between the plug and the shell.

[0021] In a further embodiment, a plurality of assembly screw holes are opened at predetermined positions on the back cover and the shell, and matching fixing screws for fixing the back cover and the shell are installed in the assembly screw holes, and an internal tooth locking washer is arranged between the fixing screw and the upper part of the assembly screw hole.

[0022] Beneficial effects: The utility model discloses a rotary resistance material level switch, which can be used to detect whether the motor fails by adding a detection sensing component and a magnet at the lower end of the motor; at the same time, this product is provided with an upper material level and a lower material level, which can be respectively installed at the bottom or the top of the hopper, and the position can be flexibly changed in actual use; and a rubber seal is used between the mounting base and the rotary rod to ensure a super dustproof sealing effect, and secondly, a Hall switch is installed inside the shell, which can be used to detect the motor status in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0024] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0025] Figure 3 It is a cross-sectional structural schematic diagram of the utility model from another viewing angle.

[0026] Figure 4 It is a schematic diagram of the top structure of the utility model.

[0027] The reference numerals in the figure are: 1. back cover, 2. grounding terminal, 3. first bearing, 4. mounting seat, 5. second bearing, 6. rotating rod, 7. blade, 8. mounting pin, 9. seal, 10. sealing support, 11. first O-ring, 12. second O-ring, 13. retaining ring, 14. housing, 15. motor, 16. circuit board assembly, 17. sealing gasket, 18. fixing screw, 19. plug, 20. terminal head, 21. internal tooth locking washer, 22. third O-ring. DETAILED DESCRIPTION

[0028] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0029] The applicant believes that the existing anti-rotation structure lacks motor detection status and cannot send signals in real time, which may lead to problems such as material waste and safety accidents in real scenarios.

[0030] To this end, the applicant proposes a rotary level switch, such as Figure 1-Figure 4 As shown, it includes a shell component, a connecting component, a material detection component, a driving component, a detection sensing component, a wire passing component and a sealing component.

[0031] Specifically, the housing assembly includes a housing 14 and a back cover 1 installed at one end of the housing 14 .

[0032] Among them, a plurality of assembly screw holes are opened at predetermined positions on the back cover 1 and the shell 14, and matching fixing screws 18 for fixing the back cover 1 and the shell 14 are installed in the assembly screw holes, and an internal tooth locking washer 21 is arranged between the fixing screw 18 and the upper part of the assembly screw hole.

[0033] In the present application, the preferred material of the back cover 1 and the shell 14 is ADC12, the fixing screw 18 is a slotted pan head screw that does not come out, the preferred material of the fixing screw 18 is SUS304, and the preferred material of the internal tooth locking washer 21 is nitrile.

[0034] The connecting assembly includes a mounting seat 4 mounted on an end of the housing 14 away from the rear cover 1 , a mounting hole is formed through the middle of the mounting seat 4 , and the connecting assembly also includes a second bearing 5 and a first bearing 3 .

[0035] Among them, the second bearing 5 is installed between the inner wall of the mounting hole and the rotating rod 6 and is arranged close to the side of the blade 7, and is used for the mounting seat 4 and the rotating rod 6 to be rotatably connected. The first bearing 3 is installed between the inner wall of the mounting hole and the rotating rod 6 and is located between the second bearing 5 and the motor 15, and is used to cooperate with the second bearing 5 to make the mounting seat 4 and the rotating rod 6 rotatably connected.

[0036] In the present application, the first bearing 3 and the second bearing 5 are preferably bearing 6900RS, and the mounting seat 4 is preferably made of a hexagonal aluminum rod.

[0037] The material detection assembly comprises a rotary rod 6 inserted into the mounting hole and a blade 7 connected to an end of the rotary rod 6 away from the mounting seat 4 .

[0038] Among them, an embedding groove adapted to the blade 7 is opened at one end of the rotating rod 6 away from the mounting seat 4, and the blade 7 is clamped with the rotating rod 6 through the embedding groove. Pin holes connected to the embedding groove are correspondingly penetrated on the rotating rod 6 and the blade 7, and a mounting pin 8 for fixing the blade 7 and the rotating rod 6 is adapted to be installed in the pin hole.

[0039] In the present application, the preferred material of the rotary rod 6 and the blade 7 is SUS304.

[0040] The driving assembly includes a motor 15 installed at a predetermined position in the housing 14 . The driving end of the motor 15 is connected to an end of the rotary rod 6 away from the blade 7 . A motor bracket is also provided on the motor 15 .

[0041] The detection sensing component includes a magnet disposed at the lower end of the motor 15 and a Hall switch disposed at a predetermined position in the housing 14 , and is used to detect the state of the motor 15 .

[0042] In addition, the detection sensing component also includes a circuit board component 16, a signal light, etc., which are used for sensing alarms, etc. For details, reference may be made to the relevant structure and principle of the rotary level switch in the relevant prior art.

[0043] The circuit board assembly 16 is disposed at a predetermined position in the housing 14 , and the micro switch is installed at a predetermined position in the housing 14 .

[0044] The wire passing assembly includes a terminal head 20 mounted at a predetermined position on the housing 14 for passing the wire.

[0045] In the present application, the terminal head 20 uses an explosion-proof nylon gland, preferably made of PA6 and with a size of M20x1.5.

[0046] like Figure 2-Figure 3 As shown, the sealing assembly is used to seal and protect the corresponding components, including a sealing member 9, a sealing support member 10, a second O-ring 12, a retaining ring 13, a first O-ring 11, a sealing gasket 17 and a third O-ring 22, etc.

[0047] Specifically, the seal 9 is arranged between the rotating rod 6 and the inner wall of the mounting hole and is located on the side of the second bearing 5 away from the first bearing 3. The sealing support 10 is installed between the seal 9 and the inner wall of the mounting hole, and is used to support the installation of the seal 9. The second O-ring 12 is arranged at the connection between the mounting seat 4 and the housing 14. The retaining ring 13 is arranged at the connection between the mounting seat 4 and the housing 14 and is located on the side of the second O-ring 12 close to the motor 15. The first O-ring 11 is arranged at the connection between the mounting seat 4 and the housing 14 and is located on the side of the second O-ring 12 away from the retaining ring 13, and is used to cooperate with the retaining ring 13 and the second O-ring 12 to seal and fasten the connection between the mounting seat 4 and the housing 14. The sealing gasket 17 is arranged at the connection between the back cover 1 and the housing 14, and is used to seal and protect the connection between the back cover 1 and the housing 14. The third O-ring 22 is arranged at the connection between the plug 19 and the housing 14, and is used to seal and protect the connection between the plug 19 and the housing 14.

[0048] In the present application, the preferred material of the seal 9 and the sealing gasket 17 is NBR, the preferred material of the sealing support 10 is SUS304, and the preferred material of the first O-ring 11, the second O-ring 12 and the third O-ring 22 is NBR.

[0049] like Figure 1-Figure 4 As shown, the present application also includes a grounding terminal 2 and a plug 19 .

[0050] Among them, the grounding terminal 2 is installed at a predetermined position on the shell 14 to protect the switch as a whole and personal safety, and the plug 19 is set at a predetermined position on the shell 14 to protect the switch as a whole.

[0051] In the present application, the plug 19 is preferably made of PP plastic and has a size of M20x1.5.

[0052] Working principle: In the installation structure, a terminal head 20 is installed on the outside of the shell 14 for wiring, the back cover 1 and the shell 14 are sealed by a sealing gasket 17, and a mounting pin 8 is inserted between the rotary rod 6 and the blade 7 for limiting. The rotary rod 6 is inserted into the interior of the shell 14 and fastened by a retaining ring 13. The rotary rod 6 and the mounting seat 4 are sealed by a first bearing 3, a second bearing 5 and a seal 9.

[0053] During use, when the material reaches a certain height, the material acts on the blade 7, the blade 7 stops rotating and sends a signal, the motor 15 is blocked, the motor bracket rotates from the right side to the left side, and the signal light changes.

[0054] In addition, the present application is also provided with high material level and low material level switches for the convenience of customer selection. When the material level is low, a green light is output when there is material, a yellow light is output when there is no material, and a red light is output when there is a fault in the motor 15 or the product; the opposite is true for a high material level.

[0055] As above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A rotary paddle level switch, characterized in that: include: A housing assembly, comprising a housing and a rear cover mounted at one end of the housing; A connecting assembly, comprising a mounting seat mounted on an end of the housing away from the rear cover, wherein a mounting hole is formed through the middle of the mounting seat; The material detection assembly comprises a rotating rod inserted into the mounting hole, and a blade connected to an end of the rotating rod away from the mounting seat; A drive assembly, comprising a motor installed at a predetermined position in the housing, wherein a drive end of the motor is connected to an end of the rotary rod away from the blade; A detection sensing assembly, comprising a magnet disposed at the lower end of the motor, a Hall switch disposed at a predetermined position in the housing for detecting the state of the motor, and a circuit board assembly disposed at a predetermined position in the housing; A wire passing assembly, comprising a wiring head installed at a predetermined position on the housing, for passing the wire; The sealing assembly is used to seal and protect corresponding components.

2. The rotary paddle level switch according to claim 1, characterized in that: Also includes: A grounding terminal, installed at a predetermined position on the housing, for protecting the switch as a whole; A plug is arranged at a predetermined position on the housing and is used to protect the switch as a whole.

3. The rotary paddle level switch according to claim 1, characterized in that: The connection component also includes: A second bearing is installed between the inner wall of the mounting hole and the rotating rod and is arranged close to one side of the blade, and is used for rotationally connecting the mounting seat and the rotating rod; The first bearing is installed between the inner wall of the installation hole and the rotating rod and is located between the second bearing and the motor, and is used to cooperate with the second bearing to enable the installation seat and the rotating rod to be rotatably connected.

4. The rotary paddle level switch according to claim 1, characterized in that: The end of the rotary rod away from the mounting seat is provided with an embedding groove adapted to the blade, and the blade is clamped with the rotary rod through the embedding groove. The rotary rod and the blade are correspondingly penetrated with pin holes connected to the embedding groove, and the pin holes are adapted to install mounting pins for fixing the blade and the rotary rod.

5. The rotary paddle level switch according to claim 1, characterized in that: The sealing assembly comprises: A sealing member is disposed between the rotating rod and the inner wall of the mounting hole and is located on a side of the second bearing away from the first bearing; The sealing support is installed between the sealing member and the inner wall of the installation hole, and is used for supporting and installing the sealing member.

6. The rotary paddle level switch according to claim 1, characterized in that: The sealing assembly further comprises: A second O-ring is arranged at the connection between the mounting seat and the housing; A retaining ring is arranged at the connection between the mounting seat and the housing and is located on a side of the second O-ring close to the motor; The first O-ring is arranged at the connection between the mounting seat and the shell and is located on the side of the second O-ring away from the retaining ring, and is used to cooperate with the retaining ring and the second O-ring to seal and protect the connection between the mounting seat and the shell.

7. The rotary paddle level switch according to claim 1, characterized in that: The sealing assembly further comprises: The sealing gasket is arranged at the connection between the rear cover and the shell body, and is used for sealing and protecting the connection between the rear cover and the shell body.

8. The rotary paddle level switch according to claim 2, characterized in that: The sealing assembly further comprises: The third O-ring is arranged at the connection between the plug and the shell, and is used for sealing and protecting the connection between the plug and the shell.

9. The rotary paddle level switch according to claim 1, characterized in that: A plurality of assembly screw holes are provided at predetermined positions on the rear cover and the shell, and matching fixing screws for fixing the rear cover and the shell are installed in the assembly screw holes, and internal tooth locking washers are provided between the fixing screws and the upper part of the assembly screw holes.

Images