A door locking device

Abstract

The present invention discloses a locking device for a door, and belongs to the technical field of auxiliary devices for mixing equipment. It comprises an equipment body, a door opening is provided on the equipment body, two parallel connecting rods are hinged on the equipment body, a sealing door matching the door opening is fixedly connected to the bottom of the two connecting rods, and matching clamping handles are provided at the ends of the two connecting rods, the clamping handles are rotatably connected to a U-shaped rod through a pin, and the U-shaped rod is rotatably connected to the equipment body through a fixed seat. Through the arrangement of the clamping handle and the connecting rod, the present invention can clamp the sealing door for sealing by only pulling the clamping handle, and the operation is quick and convenient, and the locking device is fixed by the dead point position, and has a self-locking ability, so that no matter how large the reaction force of the clamped sealing door is, the clamping handle cannot be opened, and it will not be easily loosened due to the vibration of the equipment.

Description

Technical Field

[0001] The invention relates to a door locking device, belonging to the technical field of auxiliary devices of mixing equipment. Background Art

[0002] Mixing equipment is a mechanical device that uses mechanical force and gravity to evenly mix two or more materials. During the mixing process, the contact surface area of ​​the materials can also be increased to promote chemical reactions and accelerate physical changes. Mixing equipment usually has cleaning doors and inspection doors to facilitate cleaning or inspection inside the equipment. The traditional door switch lock consists of a swing bolt and a star nut. The purpose of opening and closing the door is achieved through the connection between the star nut and the swing bolt. However, this locking device is inconvenient to operate and requires continuous rotation of the star nut for disassembly. Moreover, when the door is closed for a long time, the connection between the star nut and the swing bolt is easily loosened by the vibration of the mixing equipment during operation, resulting in a poor seal of the door. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a door locking device, which solves the problem that the door locking device of the traditional mixing equipment is inconvenient to operate and easy to loosen, resulting in poor sealing of the door.

[0004] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0005] A door locking device comprises an equipment body, wherein the equipment body is provided with a door opening, and two parallel connecting rods are hinged on the equipment body, and the bottoms of the two connecting rods are fixedly connected to a sealing door matching the door opening, and the ends of the two connecting rods are provided with matching clamping handles, and the clamping handles are rotatably connected to a U-shaped rod via a pin shaft, and the U-shaped rod is rotatably connected to the equipment body via a fixing seat.

[0006] As a preferred example, a pressing force adjustment mechanism is provided on the U-shaped rod.

[0007] As a preferred example, the clamping force adjustment mechanism includes two pairs of nuts, the two pairs of nuts are respectively threadedly connected to the two vertical rod portions of the U-shaped rod, and the two pairs of nuts are clamped on the pin shaft.

[0008] As a preferred example, a handle portion is provided at the end of the connecting rod.

[0009] As a preferred example, a locking groove is provided at the upper end of the handle portion, and a snap-fitting protrusion matching the locking groove is provided on the clamping handle.

[0010] As a preferred example, the fixing seat includes a base and a cover plate, the base is fixedly connected to the equipment body, the cover plate is detachably connected to the base by bolts, and the bending portion of the U-shaped rod is located between the base and the cover plate and can be rotated at will.

[0011] As a preferred example, the clamping handle is made of plastic.

[0012] The beneficial effects of the present invention are:

[0013] 1. The present invention provides a clamping handle and a connecting rod, and the sealing door can be compressed and sealed by only pulling the clamping handle, which is quick and convenient to operate. The locking device is fixed at the dead point position and has a self-locking ability, so that no matter how large the reaction force (except the destructive reaction force) of the compressed sealing door is, the clamping handle cannot be opened, and it will not be easily loosened due to the vibration of the equipment.

[0014] 2. The present invention can adjust the pressing force of the sealing door by setting a pressing force adjusting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 for Figure 1 The structural diagram of part A in the figure;

[0017] Figure 3 It is a side structural schematic diagram of the present invention;

[0018] Figure 4 It is a schematic diagram of the structure when the present invention is opened.

[0019] In the figure: equipment body 1, sealing door 2, connecting rod 3, handle part 31, clamping handle 4, engaging protrusion 41, U-shaped rod 5, fixing seat 6, pin shaft 7, nut 8. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0021] like Figure 1-4 As shown, a door locking device includes an equipment body 1, a door opening is opened on the equipment body 1, two parallel connecting rods 3 are hinged on the equipment body 1, the bottoms of the two connecting rods 3 are fixedly connected with a sealing door 2 matching the door opening, the ends of the two connecting rods 3 are provided with matching clamping handles 4, the clamping handles 4 are rotatably connected with a U-shaped rod 5 through a pin shaft 7, and the U-shaped rod 5 is rotatably connected to the equipment body 1 through a fixing seat 6.

[0022] The U-shaped rod 5 is provided with a clamping force adjustment mechanism, which includes two pairs of nuts 8 . The two pairs of nuts 8 are respectively threadedly connected to the two vertical rods of the U-shaped rod 5 , and the two pairs of nuts 8 are clamped on the pin shaft 7 .

[0023] By adopting the above solution, the connection position of the clamping handle 4 on the U-shaped rod 5 is controlled by rotating the nut 8, so as to achieve the effect of adjusting the clamping force.

[0024] The end of the connecting rod 3 is tilted to be provided with a handle portion 31 , which is convenient for workers to hold the connecting rod 3 and thus can easily perform opening and closing operations on the sealing door 2 .

[0025] A locking groove is provided at the upper end of the handle portion 31 , and a snap-fitting protrusion 41 matching the locking groove is provided on the clamping handle 4 , thereby increasing the locking force between the clamping handle 4 and the connecting rod 3 and preventing the clamping handle 4 from slipping when being locked on the connecting rod 3 .

[0026] The fixing seat 6 includes a base and a cover plate. The base is fixedly connected to the equipment body 1, and the cover plate is detachably connected to the base by bolts. The bent portion of the U-shaped rod 5 is located between the base and the cover plate and can be rotated at will, so as to facilitate the disassembly, assembly and replacement of the clamping handle 4.

[0027] The clamping handle 4 is made of plastic material, preferably engineering plastic with high mechanical strength, which can save costs, has certain elastic toughness, and has a long service life.

[0028] Working principle: When the sealing door 2 on the mixing equipment needs to be closed and locked, the worker directly holds the clamping handle 4, puts the U-shaped rod 5 and the clamping handle 4 on the handle portion 31 of the connecting rod 3, and embeds the engaging protrusion 41 in the locking groove, and then continues to rotate the clamping handle 4, and uses the lever action to press the engaging protrusion 41 downward, thereby locking the sealing door 2. At this time, the force points between the pin shaft 7 and the clamping handle 4, the force points between the engaging protrusion 41 and the locking groove, and the force points between the U-shaped rod 5 and the fixing seat 6 are all in the same straight line and in the dead point position, so that the locking device will not be pushed open by the sealing door 2. Compared with traditional locking devices, it is more flexible and practical, and has a stronger clamping force.

[0029] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A door locking device, comprising a device body (1), wherein the device body (1) is provided with a door opening, characterized in that: Two parallel connecting rods (3) are hingedly connected to the device body (1); the bottoms of the two connecting rods (3) are fixedly connected to a sealing door (2) matching the door opening; the ends of the two connecting rods (3) are provided with matching clamping handles (4); the clamping handles (4) are rotatably connected to a U-shaped rod (5) via a pin shaft (7); and the U-shaped rod (5) is rotatably connected to the device body (1) via a fixing seat (6); The U-shaped rod (5) is provided with a pressing force adjustment mechanism; The end of the connecting rod (3) is tilted and provided with a handle portion (31); A locking groove is formed at the upper end of the handle portion (31), and a locking protrusion (41) matching the locking groove is provided on the pressing handle (4); The pressing force adjustment mechanism comprises two pairs of nuts (8), the two pairs of nuts (8) are respectively threadedly connected to the two vertical rods of the U-shaped rod (5), and the two pairs of nuts (8) are clamped on the pin shaft (7); The fixing seat (6) comprises a base and a cover plate, the base is fixedly connected to the device body (1), the cover plate is detachably connected to the base via bolts, and the bent portion of the U-shaped rod (5) is located between the base and the cover plate and can rotate freely; The pressing handle (4) is made of plastic.

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