Safety linkage structure of sealing cover of screw conveyer

Abstract

The utility model discloses a safety linkage structure of a sealing cover of a screw conveyor, which comprises a conveyor bottom shell and a top cover detachably connected to the top of the conveyor bottom shell, one side of the conveyor bottom shell is fixedly connected with a mounting seat, the mounting seat is provided with a normally open position switch connected in series in a drive circuit of the screw conveyor, and the position switch is fixedly connected with the conveyor bottom shell. The side, corresponding to the direction of the position switch, of the top cover is fixedly connected with a detection part, when the top cover covers the conveyor bottom shell, the detection part corresponds to the position of the position switch, and the position switch can detect the detection part so that the position switch can be in a closed state. According to the utility model, the structure is simple, and the separation of the top cover and the operation of the equipment are linked, so that the condition of accidental startup during the internal maintenance of the equipment is avoided, and the safety of the maintenance is improved.

Description

Technical Field

[0001] This utility model relates to the field of screw conveyor technology, specifically to a safety linkage structure for the sealing cover of a screw conveyor. Background Technology

[0002] In the field of sludge treatment, screw conveyors are commonly used to transport sludge to lower-level sludge treatment units for treatment and cleaning. However, after a period of use, screw conveyors need to be shut down and the top cover opened for cleaning and maintenance of the internal screw blades and inner walls. During cleaning and maintenance, accidental activation of switches is possible, which can injure maintenance personnel. Therefore, ensuring the safety of maintenance personnel and preventing accidents requires further consideration. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide a safety linkage structure for the sealing cover of a screw conveyor that can prevent the equipment from being accidentally started during disassembly and maintenance and improve the safety of operation.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A safety linkage structure for a sealing cover of a screw conveyor includes a conveyor base and a detachable top cover connected to the top of the conveyor base. A mounting base is fixedly connected to one side of the conveyor base, and a normally open position switch connected in series in the screw conveyor drive circuit is installed on the mounting base. A detection unit is fixedly connected to one side of the top cover corresponding to the position switch. When the top cover is placed on the conveyor base, the detection unit corresponds to the position switch, and the detection unit triggers the position switch to close, so as to open the drive circuit. When the top cover leaves the conveyor base, the position switch returns to the open state, so as to disconnect the drive circuit.

[0006] In this invention, the position switch, as a crucial component for detecting whether the top cover is open or closed, effectively determines the status of the top cover based on its current position. For example, if the top cover is open, it has been removed from the conveyor's base and maintenance personnel are performing maintenance work. In this case, the position switch cannot detect the detection part on the top cover, and is in the open state. Therefore, the screw conveyor drive circuit is disconnected, and even if the equipment switch is accidentally activated, the equipment cannot operate. Conversely, if the top cover is closed, the position switch can detect the detection part on the top cover and is in the closed state. This means the equipment can be started normally via the equipment switch without affecting its operation. This allows for safety linkage based on the equipment's maintenance status, preventing the equipment from starting when the top cover is open, thereby improving the safety of maintenance operations.

[0007] As an optimization, the position switch is a limit switch, and the detection unit includes a support rod fixedly connected to the top cover and arranged vertically. A contact plate is fixedly connected to the lower end of the support rod. When the top cover is placed on the bottom shell of the conveyor, the contact plate can trigger the contacts on the limit switch to connect the drive circuit of the screw conveyor.

[0008] As an optimization, the detection unit also includes a support fixedly connected to the top cover. The support has a through hole in the vertical direction. The support rod passes through the through hole along the center line of the through hole and can slide with it in the vertical direction. The support rod has an external thread along its length. The support rod has a locking nut threaded on its upper and lower sides of the support. The locking nuts are respectively pressed against the support on their respective sides to fix the support rod on the support.

[0009] Compared with existing technologies, this utility model has a simple structure. By linking the separation of the top cover with the operation of the equipment, it avoids accidental startup during internal maintenance of the equipment, thus improving the safety of maintenance. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the top cover in the closed state of this utility model;

[0011] Figure 2 This is a structural diagram of the top cover in the disassembled and opened state of this utility model;

[0012] Figure 3 This is a schematic diagram of the installation structure of the position switch in this utility model. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this invention, 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 invention based on the specific circumstances.

[0015] like Figures 1 to 3 As shown, the safety linkage structure of the sealing cover of the screw conveyor in this specific embodiment includes a conveyor base 1 and a top cover 2 detachably connected to the top of the conveyor base 1. A mounting base is fixedly connected to one side of the conveyor base 1, and a normally open position switch 3 connected in series in the screw conveyor drive circuit is installed on the mounting base. A detection unit is fixedly connected to the side of the top cover 2 corresponding to the position switch. When the top cover 2 is placed on the conveyor base 1, the detection unit corresponds to the position of the position switch 3, and the detection unit triggers the position switch 3 to close, so that the drive circuit is open. When the top cover 2 leaves the conveyor base 1, the position switch 3 returns to the open state, so that the drive circuit is disconnected.

[0016] In this specific embodiment, the position switch 3 is a limit switch, and the detection unit includes a support rod 4 fixedly connected to the top cover 2 and vertically arranged. The lower end of the support rod 4 is fixedly connected to a contact plate 5. When the top cover 2 is placed on the bottom shell 1 of the conveyor, the contact plate 5 can trigger the contacts on the limit switch to connect the drive circuit of the screw conveyor.

[0017] In this specific embodiment, the detection unit further includes a support 6 fixedly connected to the top cover 2. A through hole is provided on the support 6 in the vertical direction. The support rod 4 passes through the through hole along the center line of the through hole and can slide with it in the vertical direction. An external thread is provided on the rod body of the support rod 4 along its length direction. Locking nuts 7 are threadedly fitted on the upper and lower sides of the rod body of the support 6, respectively. The locking nuts 7 abut against the support 6 on their respective sides to fix the support rod 4 on the support 6.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail can be made without departing from the spirit and scope of this utility model as defined in the appended claims.

Claims

1. A safety linkage for a seal cover of a screw conveyor, comprising a conveyor base and a top cover removably attached to the top of the conveyor base, characterized in that: One side of the conveyor bottom shell is fixedly connected with a mounting seat, the mounting seat is installed with a normally open type position switch connected in series in the spiral conveyor driving circuit, one side of the top cover corresponding to the position switch is fixedly connected with a detection part, when the top cover is covered on the conveyor bottom shell, the detection part corresponds to the position of the position switch, the detection part triggers the position switch to make it closed, so as to make the driving circuit pass, when the top cover is away from the conveyor bottom shell, the position switch returns to the open state, so as to make the driving circuit open.

2. The safety linkage for a seal cover of a screw conveyor according to claim 1, characterized in that: The position switch is a travel switch, the detection part includes a support rod fixedly connected with the top cover and vertically arranged, the lower end of the support rod is fixedly connected with a contact plate, when the top cover is covered on the conveyor bottom shell, the contact plate can touch the contact on the travel switch to realize the connection of the spiral conveyor driving circuit.

3. The safety linkage for a seal cover of a screw conveyor according to claim 2, characterized in that: The detection part further includes a support base fixedly connected with the top cover, a through hole is provided on the support base in the vertical direction, the support rod passes through the through hole along the center line direction of the through hole and can slide with the through hole in the vertical direction, an external thread is arranged on the rod body of the support rod along the length direction of the rod body, lock nuts are threadedly connected with the rod body on the upper and lower sides of the support base respectively, and the lock nuts are abutted on the support base on the side to fix the support rod on the support base.

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