Limiting device of stirring head lifting type drying machine

Abstract

The utility model relates to a limiting device of a stirring head lifting type drying machine. The upper limiting structure comprises a first detection device arranged on the lifting driving device and a first detection column connected with the lifting plate, and when the lifting driving device drives the stirring head to ascend, the first detection device can detect the first detection column when the first detection column is not detected. Triggering a signal for stopping the lifting driving device; the lower limiting structure comprises a second detection device arranged on the lifting plate and a second detection column movably connected to the lifting plate; when the lifting driving device drives the stirring head to descend, the second detection column can be triggered and move towards the direction of the second detection device, and the second detection device can trigger a signal enabling the lifting driving device to stop when detecting the detection piece. And the problems of stress relaxation and mechanical wear caused by collision stop in a traditional hard limiting structure are effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of powder stirring and drying, in particular to a limiting device for a stirring head lifting type drying machine. Background Art

[0002] The raising and lowering of a dryer's agitator head is a crucial operation during the drying and mixing process, directly impacting the equipment's stability and efficiency. During operation, the agitator head must be precisely positioned within a predetermined height range to ensure uniform and efficient mixing and drying of the materials. To ensure that the agitator head remains precisely in the designated position when raised or lowered, avoiding excessive movement or deviation, a limiter is required to control its travel.

[0003] In the prior art, commonly used in-position limiting devices usually adopt a hard limiting structure, that is, the in-position positioning of the stirring head is achieved through adjustment, matching, and welding of mechanical parts.

[0004] However, this positioning method has numerous drawbacks. First, the installation and commissioning process is cumbersome and complex. Once installed, the limit devices are difficult to adjust, lacking flexibility and interchangeability, and are unable to adapt to varying equipment or operating conditions. Furthermore, during operation, hard limit devices are prone to hard contact due to inertia. Prolonged use can lead to stress relaxation and excessive plastic deformation, reducing the equipment's positioning accuracy. This loss of accuracy not only impacts production efficiency but can also pose safety risks during equipment operation. Summary of the Invention

[0005] To this end, the technical problem to be solved by the present invention is to overcome the problems in the prior art that the limiting device of the dryer stirring head adopts hard limiting, which requires matching and welding positioning, and the difficulty in achieving interchangeability, as well as to avoid stress relaxation caused by collision positioning, reduced positioning accuracy, and impact on the safety of the equipment operation process.

[0006] In order to solve the above technical problems, the present invention provides a limiting device for a stirring head lifting dryer, wherein the dryer comprises a lifting drive device, a lifting plate driven and lifted by the lifting drive device, and a stirring head mounted on the lifting plate, wherein the stirring head is used to cooperate with a container; the limiting device comprises:

[0007] an upper limit structure, comprising a first detection device provided on the lifting drive device and a first detection column connected to the lifting plate, wherein when the lifting drive device drives the stirring head to rise, the first detection device can trigger a signal to stop the lifting drive device if the first detection column is not detected;

[0008] The lower limit structure includes a second detection device arranged on the lifting plate and a second detection column movably connected to the lifting plate; wherein, when the lifting drive device drives the stirring head to descend, the second detection column can be triggered and move toward the second detection device, and the second detection device can trigger a signal to stop the lifting drive device when detecting the detection member.

[0009] In one embodiment of the present utility model, the lifting drive device includes a hydraulic cylinder, a wear-resistant sleeve is provided on the hydraulic cylinder, the first detection column is slidably connected to the wear-resistant sleeve, and a first mounting bracket for mounting the first detection device is connected to the hydraulic cylinder.

[0010] In one embodiment of the present invention, the first mounting bracket is vertically adjustably connected to the lifting plate.

[0011] In one embodiment of the present invention, two first detection columns are provided, and the two first detection columns are symmetrically arranged along two sides of the hydraulic cylinder and are respectively provided with a corresponding first detection device.

[0012] In one embodiment of the present invention, an inductive washer is connected to one end of the second detection column close to the second detection device, and the inductive washer can be limited by the lifting plate.

[0013] In one embodiment of the present invention, a guide sleeve is provided on the lifting plate, and the second detection column is slidably connected to the guide sleeve.

[0014] In one embodiment of the present invention, the lifting plate is provided with a mounting structure, the mounting structure is provided with a mounting seat, and the guide sleeve is mounted on the mounting seat.

[0015] In one embodiment of the present invention, a second mounting bracket for mounting the second detection device is connected to the lifting plate.

[0016] In one embodiment of the present invention, a transmission box and a vacuum cover are further included which are installed on the lifting plate. The stirring head includes a stirring paddle which is driven by the transmission box. The stirring paddle, the guide sleeve and the second detection column all pass through the vacuum cover.

[0017] In one embodiment of the present invention, both the first detection device and the second detection device are proximity switches.

[0018] The above technical solution of the utility model has the following advantages compared with the prior art:

[0019] The utility model discloses a limiter device for a mixing head lifting dryer. Through upper and lower limiter structures, the device precisely limits the mixing head during its ascent and descent, effectively avoiding the stress relaxation and mechanical wear caused by collision stops in traditional hard limiter structures. When the mixing head reaches its proper position, the limiter triggers a detection signal to stop the device, preventing excessive movement. This improves the safety of the device's operation and reduces damage and potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0021] Figure 1 This is a structural diagram of the utility model mixing head lifting type dryer.

[0022] Figure 2 yes Figure 1 A local enlarged schematic diagram of point II in the middle.

[0023] Figure 3 yes Figure 2 Schematic diagram of the center A direction.

[0024] Figure 4 yes Figure 1 A local enlarged schematic diagram of point III in the middle.

[0025] Description of the accompanying drawings:

[0026] 10. Frame; 20. Container; 30. Vacuum cover; 40. Bearing chamber; 50. Cover; 60. Transmission box; 70. Lifting drive device; 80. Agitator;

[0027] 61. Lifting plate; 62. Induction washer; 63. Second detection device; 64. Second mounting bracket; 65. Locking pin; 66. Second detection column; 67. Mounting seat; 68. Guide sleeve; 71. Hydraulic cylinder; 72. First detection column; 73. First detection device; 74. First mounting bracket; 75. Adjustment piece; 76. Wear-resistant sleeve. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0029] In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0030] In this utility model, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of this utility model, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0031] In this utility model, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of these terms in this utility model based on the specific content of the technical solution.

[0032] Reference Figure 1 As shown, the present invention is a stirring head lifting type dryer limiting device, the dryer includes a frame 10, and a lifting drive device 70, a lifting plate 61 driven and lifted by the lifting drive device 70, and a stirring head mounted on the lifting plate 61, the stirring head is used to cooperate with the container 20; the limiting device includes:

[0033] The upper limit structure includes a first detection device 73 provided on the lifting drive device 70 and a first detection column 72 connected to the lifting plate 61, wherein when the lifting drive device 70 drives the stirring head to rise, the first detection device 73 can trigger a signal to stop the lifting drive device 70 if the first detection column 72 is not detected;

[0034] The lower limit structure includes a second detection device 63 arranged on the lifting plate 61, and a second detection column 66 movably connected to the lifting plate 61; wherein, when the lifting drive device 70 drives the stirring head to descend, the second detection column 66 can be touched and move toward the second detection device 63, and the second detection device 63 can trigger a signal to stop the lifting drive device 70 when detecting the detection member.

[0035] The above-mentioned arrangement ensures the safety of the equipment operation process and avoids the problems of hard limit stress relaxation and reduced positioning accuracy caused by collision stops due to hard limits. In addition, traditional hard limit devices require mechanical adjustment and welding to fix, making it difficult to achieve interchangeability and flexible adjustment of equipment under different working conditions. However, the present invention uses a movable detection column and detection device, and the limit structure does not require a complex adjustment process. It can adapt to different types of mixing equipment and changes in working conditions, thereby enhancing the adaptability and interchangeability of the equipment.

[0036] In one embodiment, the lifting drive device 70 includes a hydraulic cylinder 71, which is mounted on the lifting plate 61 via an adjustment member 75 (e.g., a connecting screw). The hydraulic cylinder 71 is provided with a wear-resistant sleeve 76, and the first detection column 72 is slidably connected to the wear-resistant sleeve 76. The hydraulic cylinder 71 is connected to a first mounting bracket 74 for mounting the first detection device 73. The first detection column 72 not only cooperates with the first detection device 73 but also serves as a guide.

[0037] Specifically, refer to Figure 3 As shown, the first mounting bracket 74 is vertically adjustably connected to the lifting plate 61; two first detection columns 72 are provided, and the two first detection columns 72 are symmetrically arranged along both sides of the hydraulic cylinder 71 and respectively corresponding to a first detection device 73.

[0038] In one embodiment, referring to Figure 4 As shown, the end of the second detection column 66 close to the second detection device 63 is connected to the sensing washer 62 , and the sensing washer 62 is connected to the second detection column 66 via a locking pin 65 . The sensing washer 62 can be limited by the lifting plate 61 .

[0039] Specifically, a guide sleeve 68 is provided on the lifting plate 61 , and the second detection column 66 is slidably connected to the guide sleeve 68 .

[0040] Specifically, the lifting plate 61 is provided with a mounting structure, the mounting structure is provided with a mounting seat 67, and the guide sleeve 68 is mounted on the mounting seat 67. A second mounting bracket 64 for mounting the second detection device 63 is connected to the lifting plate 61.

[0041] In one embodiment, referring to Figure 1As shown, the apparatus further includes a transmission box 60 and a vacuum cover 30 mounted on the lifting plate 61. The stirring head includes a stirring paddle 80 drivingly connected to the transmission box 60. The stirring paddle 80, the guide sleeve 68, and the second detection column 66 all pass through the vacuum cover 30. Furthermore, the lifting plate 61 is specifically the bottom plate of the transmission box 60. The stirring paddle 80 is connected to the vacuum cover 30 via a bearing cavity 40. The output of the transmission box 60 is connected to the stirring paddle 80 via a transmission belt. A cover 50 is provided above the transmission box 60 and the stirring paddle 80.

[0042] In one embodiment, the first detection device 73 and the second detection device 63 are both proximity switches, and the hydraulic cylinder 71 and the proximity switches are both connected to a PLC controller.

[0043] Mixing head lifting process: Figure 2 、 Figure 3 As shown, the hydraulic cylinder 71 provides a lifting force, driving the vacuum cover 30, the bearing chamber 40, the cover 50, the transmission box 60, and the stirring paddle 80 to move vertically upward. At the same time, the wear-resistant sleeve 76 remains stationary, and the guide column slides vertically upward through the wear-resistant sleeve 76. When the stirring paddle 80 separates from the container 20 for a distance, the first detection column 72 moves away from the first detection device 73. The sensing signal of the first detection device 73 (proximity switch) fastened to the first mounting bracket 74 disappears, and an early warning is issued, forcing the hydraulic cylinder 71 to stop its vertical upward movement, thereby achieving the upper limit.

[0044] The process of the mixing head descending: Figure 4 As shown, during the descent process, the hydraulic cylinder 71 drives the vacuum cover 30, the bearing chamber 40, the cover shell 50, the transmission box 60, and the stirring paddle 80 to move vertically downward. When the descent reaches the specified position, if a fault occurs and the descent continues or the descent continues due to human violation, the second detection column 66 contacts the corresponding structure on the container 20, so that the second detection column 66 drives the sensing gasket 62 to move vertically upward. At this time, the second detection device 63 senses the sensing gasket 62, issues an early warning, and forcibly stops the hydraulic cylinder 71 from continuing to descend, thereby achieving the descent limit.

[0045] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A stirring head lifting type dryer limiting device, the dryer comprising a lifting drive device (70), a lifting plate (61) driven and lifted by the lifting drive device (70), and a stirring head mounted on the lifting plate (61), the stirring head being used to cooperate with a container (20); characterized in that: The limiting device includes: an upper limit structure, comprising a first detection device (73) provided on the lifting drive device (70) and a first detection column (72) connected to the lifting plate (61), wherein when the lifting drive device (70) drives the stirring head to rise, the first detection device (73) can trigger a signal to stop the lifting drive device (70) if the first detection column (72) is not detected; The lower limit structure includes a second detection device (63) arranged on the lifting plate (61), and a second detection column (66) movably connected to the lifting plate (61); wherein, when the lifting drive device (70) drives the stirring head to descend, the second detection column (66) can be touched and move toward the second detection device (63), and the second detection device (63) can trigger a signal to stop the lifting drive device (70) when detecting the second detection column (66).

2. The limiting device of the stirring head lifting dryer according to claim 1, characterized in that: The lifting drive device (70) includes a hydraulic cylinder (71), a wear-resistant sleeve (76) is provided on the hydraulic cylinder (71), the first detection column (72) is slidably connected to the wear-resistant sleeve (76), and a first mounting bracket (74) for mounting the first detection device (73) is connected to the hydraulic cylinder (71).

3. The limiting device of the stirring head lifting type dryer according to claim 2, characterized in that: The first mounting bracket (74) is vertically adjustably connected to the lifting plate (61).

4. The limiting device for a stirring head lifting dryer according to claim 2, characterized in that: Two first detection columns (72) are provided, and the two first detection columns (72) are symmetrically arranged along both sides of the hydraulic cylinder (71) and are respectively provided with a corresponding first detection device (73).

5. The limiting device for a stirring head lifting dryer according to claim 1, characterized in that: An end of the second detection column (66) close to the second detection device (63) is connected to a sensing washer (62), and the sensing washer (62) can be limited by the lifting plate (61).

6. The limiting device for a stirring head lifting type dryer according to claim 5, characterized in that: A guide sleeve (68) is provided on the lifting plate (61), and the second detection column (66) is slidably connected to the guide sleeve (68).

7. The limiting device for a stirring head lifting dryer according to claim 6, characterized in that: The lifting plate (61) is provided with a mounting structure, the mounting structure is provided with a mounting seat (67), and the guide sleeve (68) is mounted on the mounting seat (67).

8. The limiting device for a stirring head lifting dryer according to claim 1, characterized in that: A second mounting bracket (64) for mounting the second detection device (63) is connected to the lifting plate (61).

9. The limiting device for a stirring head lifting dryer according to claim 6, characterized in that: It also includes a transmission box (60) and a vacuum cover (30) installed on the lifting plate (61), the stirring head includes a stirring paddle (80) drivingly connected to the transmission box (60), and the stirring paddle (80), the guide sleeve (68) and the second detection column (66) all pass through the vacuum cover (30).

10. The limiting device for a stirring head lifting type dryer according to claim 1, characterized in that: The first detection device (73) and the second detection device (63) are both proximity switches.

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