Manhole locking device

Abstract

The utility model provides a manhole locking device, and belongs to the technical field of manhole locking. The upper side and the lower side of a manhole frame and the upper side and the lower side of a manhole cover are respectively provided with a locking device, the right side of the manhole frame and the right side of the manhole cover are respectively provided with two locking devices, a hole is formed in the side face of the manhole cover, a gear is fixed to the manhole cover through a mandrel at the position of the hole, the rotation direction of the gear is perpendicular, and the position of the mandrel deviates from the center of the gear; a rack is vertically fixed to the side face of the manhole frame and meshed with a gear on the inner side of an opening in the manhole cover, an eccentric handle and a gear straight section are fixed to the outer diameter of the gear, the gear straight section is arranged on the side, away from the mandrel, of the outer diameter of the gear, and the eccentric handle is parallel to the gear straight section. The eccentric handle with the gear and the rack are adopted, the structure is simple and stable, rapid locking of the manhole door can be achieved, the locking effect is good, the sealing performance is improved, and the manhole cover can be effectively prevented from loosening due to vibration in the transportation or operation process through the self-locking structure.

Description

Technical Field

[0001] The utility model relates to the technical field of manhole locking, in particular to a manhole locking device. Background Art

[0002] The existing return valve manhole device consists of a manhole cover, a frame and a bolt and nut fastening device. In actual use, there are the following problems: 1. The bolt and nut fastening device has a long thread stroke during assembly, and it takes a long time to assemble and disassemble. 2. The product is easy to vibrate and fall off during transportation, resulting in the loss of bolts and nuts. These two problems affect the use of the manhole device. Utility Model Content

[0003] The main purpose of the utility model is to provide a manhole locking device, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A manhole locking device comprises a manhole frame and a manhole cover, wherein the left side of the manhole frame and the manhole cover are connected by a hinge, the upper side and the lower side of the manhole frame and the manhole cover are respectively provided with a locking device, and the right side of the manhole frame and the manhole cover are provided with two locking devices, wherein the locking device comprises an eccentric handle, a rack, a spindle and a gear, a hole is opened on the side of the manhole cover, the gear is fixed to the manhole cover through the spindle at the opening, the rotation direction of the gear is vertical, and the position of the spindle deviates from the center of the gear; the rack is vertically fixed on the side of the manhole frame and meshes with the gear on the inner side of the opening on the manhole cover, the eccentric handle and the gear straight edge section are fixed on the outer diameter of the gear, the gear straight edge section is provided on the side of the outer diameter of the gear away from the spindle, and the eccentric handle and the gear straight edge section are parallel to each other.

[0006] The utility model discloses a manhole locking device, wherein the range of the straight edge section of the gear is between greater than 1 / 6 of the outer diameter of the gear and less than 1 / 2 of the outer diameter of the gear.

[0007] The utility model provides a manhole locking device. The core shaft is fixed on the outer surface of the manhole cover.

[0008] The utility model provides a manhole locking device, wherein the length of the rack is four times the length of the outer diameter of the gear.

[0009] The utility model provides a manhole locking device, wherein the diameter of the gear is 40 mm.

[0010] The utility model discloses a manhole locking device, wherein the position of the core shaft deviates from the center of the gear by 3.5 mm.

[0011] The utility model provides a manhole locking device. The eccentric handle is fixed on the axis of the core shaft, and the axis is perpendicular to the connecting line of the core shaft and the gear.

[0012] The utility model discloses a manhole locking device, which adopts an eccentric handle with a gear and a rack, has a simple and stable structure, can realize rapid locking of the manhole door, has a good locking effect, and improves the sealing performance. Its self-locking structure can effectively prevent the manhole cover from loosening due to vibration during transportation or operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a manhole locking device of the utility model;

[0014] Figure 2 This is a side view of a manhole locking device of the utility model when it is not closed;

[0015] Figure 3 This is a side view of a manhole locking device of the utility model after closing;

[0016] Figure 4 This is a top view of a manhole locking device of the utility model;

[0017] In the figure: 1 is an eccentric handle; 2 is a rack; 3 is a manhole frame; 4 is a manhole cover; 5 is a manhole; 6 is a straight edge section of a gear. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example 1

[0020] like Figure 1-4 As shown, a manhole locking device comprises a manhole frame and a manhole cover, the left side of the manhole frame and the manhole cover are connected by a hinge, the upper side and the lower side of the manhole frame and the manhole cover are respectively provided with a locking device, and the right side of the manhole frame and the manhole cover are provided with two locking devices, the locking device comprises an eccentric handle, a rack, a spindle and a gear, a hole is opened on the side of the manhole cover, the gear is fixed to the manhole cover through the spindle at the opening, and the rotation direction of the gear is vertical, and the position of the spindle deviates from the center of the gear; the side of the manhole frame is vertically fixed with the rack and meshed with the gear on the inner side of the opening on the manhole cover, the outer diameter of the gear is fixed with an eccentric handle and a gear straight edge section, the side of the outer diameter of the gear away from the spindle is provided with a gear straight edge section, and the eccentric handle and the gear straight edge section are parallel to each other.

[0021] The direction of the eccentric handle is parallel to the straight edge section of the gear. Before closing, the eccentric handle is vertically upward. At this time, the straight edge section of the gear is on the outside of the manhole device and in a vertical direction. The eccentric handle is rotated to tighten the manhole cover and the manhole frame. When the eccentric handle is rotated to vertically downward, the straight edge section of the gear is vertical on the inside of the manhole device, and the rack is meshed with the straight edge section of the gear to complete the locking action.

[0022] The utility model discloses a manhole locking device, wherein the range of the straight edge section of the gear is between greater than 1 / 6 of the outer diameter of the gear and less than 1 / 2 of the outer diameter of the gear. The straight edge of the gear is meshed with the rack to realize the fixation of the manhole locking device, and the length of the straight edge of the gear affects the meshing length of the rack and the straight edge of the gear, thereby affecting the length of the right-angle edge of the gear from the center of the gear and the core shaft.

[0023] The utility model discloses a manhole locking device, wherein the manhole cover is provided with a core shaft fixed on the outer surface of the manhole cover, a gear is fixed on the outer surface of the manhole cover through the core shaft, and the gear rotates around the core shaft.

[0024] The utility model provides a manhole locking device, wherein the length of the rack is four times the outer diameter of the gear. The circumference is 3.14 times the diameter, and the length of the rack is selected to be four times the outer diameter of the gear, so as to reserve some margin for the rolling of the gear.

[0025] The utility model provides a manhole locking device, wherein the diameter of the gear is 40 mm.

[0026] The utility model discloses a manhole locking device, wherein the position of the core shaft deviates from the center of the gear by 3.5 mm.

[0027] The utility model discloses a manhole locking device, wherein the eccentric handle is fixed on the axis of the mandrel and the axis is perpendicular to the connecting line of the mandrel and the gear. Since the eccentric handle is arranged on the axis of the mandrel, the eccentric handle rotates around the mandrel when rotating.

[0028] The gear with the eccentric handle is fixed on the manhole cover through the core shaft, and the rack is fixed on the manhole frame. The gear with the eccentric handle can mesh with the teeth on the rack. When the manhole cover is not closed, the handle of the eccentric handle is upward and the straight edge section on the gear faces outward.

[0029] When the manhole cover is closed, rotating the eccentric handle drives the gear to rotate, and the gear with the eccentric handle meshes with the rack. Since the eccentric handle is set on the axis of the core shaft, the core shaft deviates from the center of the gear. With the rotation of the eccentric handle, the radius of the gear becomes larger and larger, and the downward pressure of the gear on the rack also increases. The preload force between the manhole cover and the frame also increases continuously, and the gear moves downward along the top of the rack, so that the manhole cover and the frame gradually fit together.

[0030] When the eccentric handle is rotated 180 degrees, the rack fits with the straight edge section of the gear. At this time, the core axis distance between the rack and the eccentric handle returns to its initial size, and the pressure also returns to its initial value, completing self-locking under the design load. At this time, the manhole cover is locked.

[0031] Example 2

[0032] like Figure 1-4 As shown, a manhole locking device is specifically used as follows: when the manhole locking device is not closed, the eccentric handle on the gear is vertically upward. When the manhole device needs to be closed, the manhole cover is closed, and the gear on the inner side of the manhole cover contacts the rack on the manhole frame. Then the eccentric handle pointing vertically upward is rotated, and the gear contacts the rack. While the gear moves downward along the rack, since the initial position of the core shaft is close to the outer diameter of the gear, during the rotation process, the size of the core shaft relative to the meshing position becomes larger, thereby increasing the preload force of the manhole cover and the frame. When the eccentric handle is rotated to vertically downward, the rack meshes with the straight section of the gear to achieve the fixation of the manhole device.

[0033] This device installs an eccentric handle with a gear on the manhole cover. The handle can rotate around the core shaft. The rack is installed on the frame. The gear and the rack are normally meshed. When the manhole cover needs to be locked, the handle is rotated. Due to the eccentricity of the gear, the longitudinal stress will become greater and greater as the handle rotates. When it rotates 180°, the notch of the gear meshes with the rack to achieve the locking purpose.

[0034] Example 3

[0035] A manhole locking device, Figure 1 It is a cross-sectional view of the manhole locking device. The eccentric handle in the middle is the eccentric handle on the upper side of the device. The right side of the manhole locking device shows the state where the manhole cover and the manhole frame are just in contact, and the gear and the rack are just in meshing; Figure 2 When the manhole locking device is not closed, the eccentric handle is vertically upward. Figure 3 It is the state when the manhole locking device is closed and the eccentric handle is vertically downward; Figure 4 It is a top view of the manhole device, with a hinge on the left side, a locking device on the upper side and the lower side, and two locking devices on the right side.

[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A manhole locking device, comprising a manhole frame (3) and a manhole cover (4), wherein the left sides of the manhole frame (3) and the manhole cover (4) are connected by a hinge, and characterized in that: A locking device is respectively arranged on the upper side and the lower side of the manhole frame (3) and the manhole cover (4), and two locking devices are arranged on the right side of the manhole frame (3) and the manhole cover (4), wherein the locking device comprises an eccentric handle (1), a rack (2), a spindle (5) and a gear (6); a hole is opened on the side of the manhole cover (4); the gear (6) is fixed to the manhole cover (4) at the opening through the spindle (5), and the rotation direction of the gear (6) is vertical; the position of the spindle (5) deviates from the center of the gear (6); the rack (2) is vertically fixed on the side of the manhole frame (3) and meshes with the gear (6) on the inner side of the opening on the manhole cover (4); the eccentric handle (1) and the gear straight edge section are fixed on the outer diameter of the gear (6); the gear straight edge section is arranged on the side of the outer diameter of the gear (6) away from the spindle (5); and the eccentric handle (1) and the gear straight edge section are parallel to each other.

2. The manhole locking device according to claim 1, characterized in that: The range of the straight edge section of the gear is between greater than 1 / 6 of the outer diameter of the gear and less than 1 / 2 of the outer diameter of the gear.

3. The manhole locking device according to claim 1, characterized in that: The core shaft (5) is fixed on the outer surface of the manhole cover (4).

4. The manhole locking device according to claim 1, characterized in that: The length of the rack (2) is four times the length of the outer diameter of the gear (6).

5. The manhole locking device according to claim 1, characterized in that: The diameter of the gear (6) is 40 mm.

6. The manhole locking device according to claim 1, characterized in that: The position of the core shaft (5) deviates from the center of the gear (6) by 3.5 mm.

7. The manhole locking device according to claim 1, characterized in that: The eccentric handle (1) is fixed on the axis of the core shaft (5), and the axis is perpendicular to the line connecting the core shaft (5) and the gear (6).

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