Prefabricated concrete well lid base with adjustable height

Abstract

The utility model provides a height-adjustable prefabricated concrete well lid base, which belongs to the technical field of well lids and comprises a lower base and an upper base, a middle base is arranged at the bottom of the upper base and movably arranged in the lower base, a movable groove for the middle base to move is arranged in the lower base, and the bottom of the middle base is rotatably connected with pulleys. A sliding rail allowing the sliding wheels to slide is arranged in the movable groove of the lower base, the sliding rail is provided with an arc-shaped sliding rail and a positioning pin, and the arc-shaped sliding rail and the positioning pin are obliquely arranged upwards from the bottom and are suitable for fixing the middle base in the movable groove. By arranging the pulleys and the sliding rails, rotating the upper base and fixing through the positioning pins, the height of the well lid is changed, the whole installation process is simple and efficient, and the efficiency of adjusting the height of the well lid base is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of manhole covers, in particular to a prefabricated concrete manhole cover base with adjustable height. Background Art

[0002] The base of a concrete manhole cover is usually made of reinforced concrete or cast iron. Its main function is to smoothly disperse the load, protect the ground, and increase the service life of the manhole cover. At the same time, the base of a concrete manhole cover is usually connected to underground facilities such as water supply, drainage, and power supply, which facilitates the daily inspection and maintenance of these facilities. However, the existing manhole cover bases generally have the problem of non-adjustable height.

[0003] In order to address the above problems, a Chinese patent with an existing announcement number of CN214530791U proposes a height-adjustable precast concrete manhole cover base. The device first places a lower ring body at the wellhead of the inspection well, and then selects the first boss or the second boss to place the upper ring body downward according to the required height, so that the boss is inserted into the groove, and then the lower fixing hole and the upper fixing hole are fixed with expansion bolts, fixing pins, etc., so that the upper ring body and the lower ring body are connected as one.

[0004] However, although the above-mentioned height-adjustable precast concrete manhole cover base can fix the upper ring body and the lower ring body by cooperating with multiple groups of bosses and fixing holes, thereby changing the height of the manhole cover, the height-adjustable precast concrete manhole cover base needs to be installed by inserting multiple bosses into the grooves and then fixing the two fixing holes with fixing pins. The installation steps are too cumbersome, resulting in low efficiency in adjusting the height of the manhole cover base. Therefore, the utility model provides a height-adjustable precast concrete manhole cover base to meet the needs. Utility Model Content

[0005] The utility model aims to solve the problems existing in the above-mentioned background technology and proposes a height-adjustable prefabricated concrete manhole cover base.

[0006] The technical problem to be solved by the utility model is to provide a prefabricated concrete manhole cover base with adjustable height to solve the problem that the existing manhole cover base needs to be adjusted in height through the cooperation of multiple groups of bosses and fixing holes, and its installation steps are too cumbersome, resulting in low efficiency in adjusting the height of the manhole cover base.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A height-adjustable prefabricated concrete manhole cover base, comprising:

[0009] Lower base;

[0010] The upper base has a middle base at the bottom, the middle base is movably arranged in the lower base, the lower base is provided with a movable groove for the middle base to move, the bottom of the middle base is rotatably connected to a pulley, the movable groove of the lower base is provided with a slide rail for the pulley to slide, and the slide rail has an arc-shaped sliding track arranged upwardly inclined from the bottom;

[0011] A positioning pin is used to fix the middle base in the movable groove.

[0012] Preferably, the lower base and the middle base are respectively provided with a first positioning hole and a second positioning hole for positioning the positioning pin.

[0013] Preferably, there are a plurality of positioning holes 2, and the inclination arcs of the plurality of positioning holes 2 are consistent with that of the slide rail.

[0014] Preferably, the positioning pin can pass through the lower base through the positioning hole and extend into the soil around the lower base.

[0015] Preferably, a guide surface inclined from top to bottom is provided on the top of the lower base.

[0016] Preferably, a pull ring is rotatably connected to the inner side of the upper base.

[0017] Compared with the prior art, the utility model has at least the following beneficial effects:

[0018] In the above scheme, the height of the manhole cover is changed by setting pulleys and slide rails, rotating the upper base, and fixing it with positioning pins. The entire installation process is simple and efficient, which improves the efficiency of adjusting the height of the manhole cover base.

[0019] In the above scheme, by setting positioning hole one and positioning hole two, the positioning hole one and positioning hole two can realize the fixation of the centering base at different heights, thereby increasing the height adjustment range of the manhole cover base and improving the application range of the manhole cover base.

[0020] In the above scheme, by setting a pull ring and a guide surface, the setting of the pull ring makes it easier for the user to drive the upper base to rotate, thereby further improving the efficiency of adjusting the height of the manhole cover base; the guide surface can guide the water flow to the bottom of the lower base, reducing the possibility of water flowing into the movable groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 For this utility model Figure 1 Schematic diagram of the local structure after cutting open;

[0024] Figure 3 It is a structural schematic diagram of the lower base of the utility model;

[0025] Figure 4 It is a partial structural schematic diagram of the slide rail of the utility model;

[0026] Figure 5 It is a partial structural schematic diagram of the upper base and the middle base of the utility model;

[0027] Figure 6 For this utility model Figure 5 Schematic diagram of the local structure from another perspective.

[0028] [reference numerals]

[0029] 1. Lower base; 2. Upper base; 3. Middle base; 4. Positioning pin; 5. Pull ring; 6. Slide rail; 7. Pulley; 8. Positioning hole 1; 9. Guide surface; 10. Positioning hole 2; 11. Movable groove. DETAILED DESCRIPTION

[0030] like Figures 1 to 6 As shown, an embodiment of the utility model provides a height-adjustable prefabricated concrete manhole cover base, including a lower base 1 and an upper base 2, a middle base 3 is provided at the bottom thereof, the middle base 3 is movably arranged in the lower base 1, a movable groove 11 for the middle base 3 to move is provided in the lower base 1, a pulley 7 is rotatably connected to the bottom of the middle base 3, a slide rail 6 for the pulley 7 to slide is provided in the movable groove 11 of the lower base 1, the slide rail 6 has an arc-shaped sliding track inclined upward from the bottom, and a positioning pin 4 is suitable for fixing the middle base 3 in the movable groove 11.

[0031] Specifically, when the height of the manhole cover base needs to be adjusted, the upper base 2 is rotated to make the upper base 2 drive the middle base 3 to rotate, and the middle base 3 drives the pulley 7 to move upward along the sliding track of the slide rail 6, thereby making the middle base 3 move toward the outside of the movable groove 11, that is, the overall height of the manhole cover base is increased. When the belt moves to the specified position, the middle base 3 is fixed in the lower base 1 by the positioning pin 4. At this time, the height adjustment of the manhole cover base is completed. The whole installation process is simple and efficient, which improves the efficiency of the height adjustment of the manhole cover base and solves the problem that the existing manhole cover base needs to be adjusted in height through the cooperation of multiple sets of bosses and fixing holes, and its installation steps are too cumbersome, resulting in low efficiency in adjusting the height of the manhole cover base.

[0032] It should be noted that the width of the movable groove 11 is greater than the thickness of the middle base 3, which ensures that there is enough space for the middle base 3 when it rotates. There are two groups of slide rails 6, and the sliding tracks of the two slide rails 6 are in the same direction; in addition, the pulley 7 can be made of hard materials, such as steel, ferroalloy, etc., to enhance the overall service life of the manhole cover base; in another embodiment, a through hole (not shown in the figure) connected to the base of the movable groove 11 can be set through the inner wall of the lower base 1. The advantage of this is that the movable groove 11 can be ventilated and the water in the movable groove 11 can be discharged to avoid damage to the manhole cover base and the pulley 7.

[0033] like Figure 2 , Figure 5 and Figure 6 As shown, in the present embodiment, a positioning hole 1 8 and a positioning hole 2 10 for positioning the positioning pin 4 are respectively penetrated on the lower base 1 and the middle base 3. There are multiple positioning holes 2 10, and the inclination arcs of the multiple positioning holes 2 10 are consistent with the slide rail 6. Specifically, the positioning holes 1 8 and the positioning holes 2 10 can be used to fix the centering base 3 at different heights, thereby increasing the height adjustment range of the manhole cover base and improving the application range of the manhole cover base.

[0034] like Figure 1 and Figure 3 As shown, in this embodiment, the positioning pin 4 can pass through the lower base 1 through the positioning hole 1 8 and extend into the soil around the lower base 1. Specifically, after the positioning pin 4 passes through the positioning hole 1 8 and the positioning hole 2 10, it can continue to move and be inserted into the soil near the lower base 1, which can improve the stability of the manhole cover base. In this embodiment, the technology for installing the lower base 1 and the upper base 2 in the soil is prior art and will not be described in detail here.

[0035] like Figure 2 and Figure 3 As shown, in this embodiment, a guide surface 9 inclined from top to bottom is provided on the top of the lower base 1 . Specifically, the guide surface 9 can guide the water flow to the bottom of the lower base 1 , reducing the possibility of the water flow being discharged to the movable groove 11 .

[0036] like Figure 1 and Figure 5 As shown, in this embodiment, a pull ring 5 is rotatably connected to the inner side of the upper base 2. Specifically, the provision of the pull ring 5 facilitates the user to drive the upper base 2 to rotate, thereby further improving the efficiency of adjusting the height of the manhole cover base.

[0037] Working principle:

[0038] When it is necessary to adjust the height of the manhole cover base, the upper base 2 is rotated by the pull ring 5, so that the upper base 2 drives the middle base 3 to rotate, and the middle base 3 drives the pulley 7 to move upward along the sliding track of the slide rail 6, so that the middle base 3 moves toward the outside of the movable groove 11, that is, the overall height of the manhole cover base is increased. When the belt moves to the specified position, the middle base 3 is fixed in the lower base 1 by the positioning pin 4. At this time, the adjustment of the height of the manhole cover base is completed. The whole installation process is simple and efficient, which improves the efficiency of adjusting the height of the manhole cover base and solves the problem that the existing manhole cover base needs to be adjusted in height through the cooperation of multiple sets of bosses and fixing holes, and its installation steps are too cumbersome, resulting in low efficiency in adjusting the height of the manhole cover base.

Claims

1. A height-adjustable precast concrete manhole cover base, characterized in that: include: Lower base (1); The upper base (2) has a middle base (3) at the bottom thereof, the middle base (3) is movably arranged in the lower base (1), the lower base (1) is provided with a movable groove (11) for the middle base (3) to move, the bottom of the middle base (3) is rotatably connected with a pulley (7), the movable groove (11) of the lower base (1) is provided with a slide rail (6) for the pulley (7) to slide, and the slide rail (6) has an arc-shaped sliding track arranged upwardly from the bottom; A positioning pin (4) is used to fix the middle base (3) in the movable groove (11).

2. The height-adjustable precast concrete manhole cover base according to claim 1, characterized in that: The lower base (1) and the middle base (3) are respectively provided with a first positioning hole (8) and a second positioning hole (10) for positioning the positioning pin (4).

3. The height-adjustable precast concrete manhole cover base according to claim 2, characterized in that: There are multiple positioning holes 2 (10), and the inclination arcs of the multiple positioning holes 2 (10) are consistent with that of the slide rail (6).

4. The height-adjustable precast concrete manhole cover base according to claim 2, characterized in that: The positioning pin (4) can pass through the lower base (1) through the positioning hole 1 (8) and extend into the soil around the lower base (1).

5. The height-adjustable precast concrete manhole cover base according to claim 4, characterized in that: The top of the lower base (1) is provided with a guide surface (9) inclined from top to bottom.

6. The height-adjustable precast concrete manhole cover base according to claim 1, characterized in that: A pull ring (5) is rotatably connected to the inner side of the upper base (2).

Images