Sewage well lid fixing device

Abstract

The utility model discloses a sewage well lid fixing device which comprises a well seat and a well lid arranged on the well seat in a matched mode, a ratchet wheel is arranged on the inner circumference of the well seat, the bottom, facing the well seat, of the well lid is connected with a guide seat, the outer circumferential wall of the guide seat is connected with a guide cylinder correspondingly communicated with the interior of the guide seat, and a limiting disc is arranged in the guide seat. A positioning piece matched and corresponding to the ratchet wheel and the limiting disc is arranged in the guide cylinder; according to the sewage well lid fixing device, the ratchet wheel is locked by the two pawls through the cooperation of the ratchet wheel, the positioning piece and the limiting disc, the locking effect on the ratchet wheel is completed, the well base has firm fixing force on the well lid, locking is reliable, and the well lid is convenient to fix and disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal sewage discharge, and more specifically to a sewage manhole cover fixing device. Background Art

[0002] Manhole covers are iron covers used to cover sewers, drainage ditches and other equipment. Manhole covers are often lost or damaged, which can easily cause pedestrians and vehicles to fall into the well, and even cause serious casualties. If the manhole cover is welded directly to the well seat and cannot be opened, maintenance personnel cannot go down to work. Therefore, a fixing device that is easy to fix and open is needed to prevent the manhole cover from being lost and facilitate maintenance. Utility Model Content

[0003] To this end, the technical problem to be solved by the utility model is to provide a sewage manhole cover fixing device, which realizes the locking of the ratchet by two pawls through the cooperation of the ratchet, the positioning piece and the limit plate, thereby completing the locking effect of the ratchet, so that the manhole seat has a firm fixing force on the manhole cover, the stopping is reliable, and the fixing and disassembly of the manhole cover are convenient.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A sewage manhole cover fixing device comprises a manhole seat and a manhole cover mounted on the manhole seat, wherein a ratchet is provided on the inner periphery of the manhole seat, a guide seat is connected to the bottom of the manhole cover toward the manhole seat, a guide cylinder corresponding to the inner part of the guide seat is connected to the outer peripheral wall of the guide seat, a limit plate is provided inside the guide seat, and a positioning piece corresponding to the ratchet and the limit plate is provided inside the guide cylinder.

[0006] Furthermore, the well seat includes a base and a matching ring protruding from the upper end surface of the base, the matching ring is adapted to correspond to the well cover, the ratchet is embedded in the inner peripheral side wall of the base, and the central axis of the ratchet is connected to the base through a torsion spring.

[0007] Furthermore, the positioning member includes guide rod one and guide rod two, and guide rod one and guide rod two are connected by an elastic column. The end of guide rod one away from guide rod two is provided with a pawl that matches the ratchet wheel, and the end of guide rod two away from guide rod one is provided with a sliding ball that matches the limit plate.

[0008] Furthermore, the guide rod 1 and the guide rod 2 slide and displace in the guide cylinder, the end of the guide rod 1 having a pawl passes through the guide cylinder and the pawl is arranged outside the guide cylinder, and the end of the guide rod 2 having a sliding ball slides in and out of the guide seat and the guide cylinder.

[0009] Furthermore, the limiting plate is connected to the guide seat through a rotating rod, and the limiting plate includes a base plate and a plurality of convex seats evenly arranged along the outer circumference of the base plate, and grooves are formed between adjacent convex seats of the plurality of convex seats;

[0010] The groove is connected to the convex seat in an arc transition, the end of the convex seat away from the base plate is in an arc transition, and the top end of the convex seat and the bottom end of the groove are both provided with a yield groove which is inwardly concave and adapted to the sliding ball.

[0011] Furthermore, the upper end surface of the ratchet facing the manhole cover is provided with a baffle corresponding to the central axis of the ratchet, and along the radial direction between the ratchet tooth top circle and the tooth root circle, the circumferential wall of the baffle is between the tooth top circle and the tooth bottom circle of the ratchet, and the spacing between the circumferential wall of the baffle and the tooth bottom circle is greater than the spacing between the circumferential wall of the baffle and the tooth top circle.

[0012] Furthermore, the guide cylinder and the guide seat are of an integrated structure, at least one guide cylinder is provided, at least one guide cylinder is evenly arranged along the outer peripheral side wall of the guide seat, at least one guide cylinder is provided with a positioning piece, and the inner peripheral side wall of the well seat is provided with ratchets corresponding to the number of the guide cylinders and adapted to their positions.

[0013] The technical solution of the utility model has achieved the following beneficial technical effects:

[0014] 1. The utility model sewage manhole cover fixing device realizes locking of the ratchet by two pawls through the cooperation of the ratchet, the positioning member and the limit plate, thereby completing the locking effect of the ratchet, so that the manhole seat has a firm fixing force on the manhole cover, the stopping is reliable, and the fixing and removal of the manhole cover are convenient.

[0015] 2. In the sewage manhole cover fixing device of the utility model, the impact force on the manhole cover can be offset by the rotation of the torsion spring and the sliding of the sliding ball and the give way groove, thereby reducing the impact, reducing the wear, avoiding the loosening of the manhole cover, and ensuring the reliability of the fixing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the sewage manhole cover fixing device of the utility model;

[0017] Figure 2 This is a schematic diagram of the cooperation between the guide seat and the ratchet wheel of the sewage manhole cover fixing device of the utility model;

[0018] Figure 3 It is a schematic diagram of a ratchet wheel of the sewage manhole cover fixing device of the utility model;

[0019] Figure 4 This is a schematic diagram of a guide seat of a sewage manhole cover fixing device of the utility model;

[0020] Figure 5 It is a schematic diagram of a positioning member of a sewage manhole cover fixing device of the utility model;

[0021] Figure 6 It is a schematic diagram of Embodiment 2 of the sewage manhole cover fixing device of the utility model.

[0022] The reference numerals in the figure are as follows: 100, well seat; 1001, base; 1002, matching ring; 200, well cover; 1, ratchet; 101, torsion spring; 102, baffle plate; 2, guide seat; 3, guide cylinder; 4, positioning piece; 41, guide rod one; 42, ratchet; 43, elastic column; 44, guide rod two; 45, sliding ball; 5, rotating rod; 6, limit plate; 61, base plate; 62, convex seat; 63, groove; 64, clearance groove. DETAILED DESCRIPTION

[0023] The fixed connection described in this device refers to fixation by welding, threaded fixation, etc., and different fixing methods are used in combination with different usage environments. The rotating connection refers to the axial fixation of the bearing by baking it on the shaft and realizing rotation through an elastic retaining ring. The sliding connection refers to the connection through the sliding of the slider in the slide groove. The hinged connection refers to the movable connection through a pin shaft and a short shaft. The required sealing is achieved by a sealing ring or an O-ring.

[0024] Example 1

[0025] The sewage manhole cover fixing device of this embodiment is as follows Figure 1 As shown, it includes a well seat 100 and a manhole cover 200 mounted on the well seat 100. The manhole cover 200 is circular and has a through hole in the center of the well seat 100 for sewage to flow into the pipeline. The well seat 100 includes a base 1001 and a matching ring 1002 protruding from the upper end surface of the base 1001. The matching ring 1002 is adapted to correspond to the manhole cover 200. The manhole cover 200 can be mounted on the matching ring 1002. The matching ring 1002 can play the role of a reinforcing rib, thereby enhancing the bearing capacity of the well seat 100 and supporting the manhole cover 200 on the matching ring 1002, so as to facilitate the sealing and disassembly between the well seat 100 and the manhole cover 200.

[0026] Combination Figure 2 The inner periphery of the well seat 100 is provided with a ratchet 1, which is embedded in the inner peripheral side wall of the base 1001. The central axis of the ratchet 1 is connected to the base 1001 through a torsion spring 101. Figure 3 The upper end surface of the ratchet 1 facing the manhole cover 200 is provided with a baffle 102 corresponding to the central axis of the ratchet 1, and the baffle 102 is relatively statically connected to the ratchet 1. Along the radial direction between the tooth top circle and the tooth root circle of the ratchet 1, the circumferential wall of the baffle 102 is between the tooth top circle and the tooth bottom circle of the ratchet 1, and the spacing between the circumferential wall of the baffle 102 and the tooth bottom circle is greater than the spacing between the circumferential wall of the baffle 102 and the tooth top circle. When the pawl is engaged with the ratchet to form a locked state, the baffle 102 can form a blocking effect on the pawl when it is pulled upward.

[0027] The manhole cover 200 is connected to a guide seat 2 at the bottom facing the manhole seat 100. (The end face of the guide seat 2 can be fixed to the bottom of the manhole cover 200 and rotate with the manhole cover 200, or it can be connected to the manhole cover 200 by a pin. When the manhole cover 200 is stationary, it can be driven by an external force to produce a rotational movement relative to the manhole cover 200. When the guide seat 2 needs to be driven by an external force, a cylindrical shaft can be provided at the center of the end face close to the bottom of the manhole cover 200. The cylindrical shaft passes through the manhole cover 200 and is sleeved on the outer periphery of the rotating rod 5 of the limiting plate 6, and is connected to the limiting plate 6 and The setting method of the rotating rod 5 is the same. The guide seat 2 and the cylindrical shaft form an external enclosure for the limit plate 6 and the rotating rod 5, and there is no movement obstacle thereto. The rotation of the guide seat 2 and the limit plate 6 can be adjusted separately, and the specific setting is based on the use requirements. The outer peripheral wall of the guide seat 2 is connected to a guide cylinder 3 corresponding to the internal connection of the guide seat 2. The guide seat 2 is provided with a limit plate 6 inside. The guide cylinder 3 is provided with a positioning piece 4 corresponding to the ratchet 1 and the limit plate 6. According to the position of the ratchet 1, the corresponding guide seat 2 can be installed at the corresponding position at the bottom of the manhole cover 200.

[0028] Combination Figure 4 The limit plate 6 is connected to the guide seat 2 through a rotating rod 5. The rotating rod 5 passes through the manhole cover 200 and extends to the outside of the manhole cover 200. A corresponding lock hole can be installed on the rotating rod 5 to drive the rotating rod 5 to drive the limit plate 6 to rotate in the guide seat 2. The limit plate 6 includes a base plate 61 and a plurality of convex seats 62 evenly arranged along the outer circumference of the base plate 61. A groove 63 is formed between adjacent convex seats 62 of the plurality of convex seats 62. The groove 63 is connected to the convex seat 62 in an arc transition. The end of the convex seat 62 away from the base plate 61 is in an arc transition. The top end of the convex seat 62 and the bottom end of the groove 63 both have a yield groove 64 that is recessed inward and adapted to the sliding ball 45, that is, the limit plate 6 is a ratchet structure with blunt teeth, which can cooperate with the positioning member 4 to form a double ratchet locking structure that cooperates with the ratchet 1.

[0029] Specific, combined Figure 5The positioning member 4 includes a guide rod 1 41 and a guide rod 2 44, and the guide rod 1 41 and the guide rod 2 44 are connected by an elastic column 43. The guide rod 1 41 and the guide rod 2 44 can be rigid structures, and the elastic column 43 has a small telescopic structure. A spring sleeved on the outside of the positioning member 4 can be added inside the guide cylinder 3, so that the positioning member 4 can restore its original state when it is displaced by squeezing the spring, that is, when one end of the guide rod 1 41 or the guide rod 2 44 is squeezed, the guide rod 1 41 or the guide rod 2 44 can be compressed by the elastic column 43 to keep the positions of the two in a limited space without deviation, and the end of the guide rod 1 41 away from the guide rod 2 44 is provided with a pawl 42 that meshes with the ratchet 1, and the pawl 42 is inclined relative to the guide rod 1 so as to engage with the ratchet 1. The ratchet teeth are engaged, and the end of the guide rod 2 44 away from the guide rod 1 41 is provided with a sliding ball 45 adapted to the limit plate 6. The outer surface of the sliding ball 45 is a curved structure, so that it can slide when it abuts against the limit plate 6. The guide rod 1 41 and the guide rod 2 44 slide and displace in the guide cylinder 3. One end of the guide rod 1 41 with a pawl 42 passes through the guide cylinder 3 and the pawl 42 is arranged outside the guide cylinder 3. The corresponding end of the guide cylinder 3 has a limiting hole that can only allow the guide rod 1 41 to enter and exit, preventing the pawl 42 from entering. The guide rod 2 44 has an end of a sliding ball 45 that slides in and out of the guide seat 2 and the guide cylinder 3, and the corresponding end of the guide cylinder 3 has a limiting hole for the sliding ball 45 to enter and exit, so that the sliding ball 45 can freely enter and exit the guide cylinder 3 when squeezed and released, thereby adjusting the position of the pawl 42.

[0030] When it is necessary to fix the manhole cover 200 to the manhole seat 100, first rotate the rotating rod 5 so that the groove 63 of the limit plate 6 corresponds to the sliding ball 45, and the positioning member 4 is in a naturally extended state. At this time, the total length of the positioning member 4 is less than the length of the line from the bottom end of the groove 63 to the root of the ratchet teeth of the ratchet wheel, which does not affect the vertical placement of the manhole cover 200. After the manhole cover 200 is placed on the manhole seat 100, drive the guide seat 2 to rotate to adjust the position of the guide cylinder 3 so that the pawl 42 of the positioning member 4 faces the ratchet groove of the ratchet wheel 1. At this time, the movement of the guide seat 2 is stopped to keep it fixed, and the rotating rod 5 is driven to rotate the limit plate 6, so that the clearance groove 64 of the convex seat 62 of the limit plate 6 rotates to the sliding ball 45, and the sliding ball 45 is engaged in the clearance groove 64. At this time, the positioning member 4 is squeezed and displaced in the direction close to the ratchet 1, so that the pawl 42 is engaged and locked in the corresponding tooth groove, completing the locking effect on the ratchet, so that the well seat 100 has a firm fixing force on the well cover 200, and the well cover 200 is prevented from deflecting. When passers-by or vehicles step on the well cover 200, the impact force on the well cover 200 can be offset by the rotation of the torsion spring 101 and the sliding of the sliding ball 45 and the clearance groove 64, reducing the impact, reducing wear, preventing the well cover 200 from loosening, ensuring the rebound potential energy of the lock, and ensuring the reliability of the fixing device.

[0031] When it is necessary to remove the manhole cover 200, first drive the rotating rod 5 to rotate so that the sliding ball 45 slides into the groove 63, the squeezing force of the positioning member 4 disappears, and the squeezing force of the ratchet 1 and the pawl 42 causes the positioning member 4 to move along the guide cylinder until the sliding ball 45 slides into the groove 63, the engagement between the ratchet 1 and the pawl 42 fails, and the locked state is released. The manhole cover 200 is rotated in the opposite direction to release the pawl 42 from the ratchet 1, and the manhole cover 200 can be lifted up to be released from the well seat 100.

[0032] The ratchet 1, the positioning member 4 and the limit plate 6 form a double ratchet structure. The cooperation of the ratchet 1, the positioning member 4 and the limit plate 6 enables the two pawls to lock the ratchet, thereby completing the locking effect of the ratchet. When the stopping working state is in progress, the stopping is reliable, and when separation is required, the pawl can be smoothly detached from the loaded ratchet, thereby achieving an anti-theft effect.

[0033] Example 2

[0034] Sewage manhole cover fixing device, such as Figure 2 As shown, it includes a well seat 100 and a well cover 200 mounted on the well seat 100, a ratchet 1 is provided on the inner periphery of the well seat 100, the well cover 200 is connected with a guide seat 2 toward the bottom of the well seat 100, the outer peripheral wall of the guide seat 2 is connected with a guide cylinder 3 corresponding to the internal connection of the guide seat 2, a limit plate 6 is provided inside the guide seat 2, and a positioning piece 4 corresponding to the ratchet 1 and the limit plate 6 is provided inside the guide cylinder 3.

[0035] Combination Figure 6 The guide cylinder 3 and the guide seat 2 are of an integrated structure, at least one guide cylinder 3 is provided, at least one guide cylinder 3 is evenly arranged along the outer peripheral side wall of the guide seat 2, at least one guide cylinder 3 is provided with a positioning piece 4, and the inner peripheral side wall of the well seat 100 is provided with ratchet wheels 1 corresponding in number to the guide cylinder 3 and adapted in position.

[0036] In order to enhance the fixing effect of the manhole cover 200 and the well seat 100, a radial guide cylinder 3 can be provided on the periphery of the guide seat 2. The ratchet teeth are subjected to shear stress. Since the shear stress is inversely proportional to the shear area, and the shear areas of multiple teeth increase proportionally, the shear strength of multiple teeth is proportional to the number of teeth. By limiting the number of ratchet teeth of the ratchet wheel 1, the guide seat 2 can be rotated once, and the pawl 42 in each guide cylinder 3 is converted to engage with the ratchet wheel 1 at the corresponding position, thereby realizing multi-angle locking of the manhole cover 200, so that the well seat 100 and the manhole cover 200 have a reliable fixing force and better pressure resistance.

[0037] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A sewage manhole cover fixing device, comprising a manhole seat (100) and a manhole cover (200) mounted on the manhole seat (100). It is characterized in that A ratchet (1) is provided on the inner periphery of the well seat (100); a guide seat (2) is connected to the bottom of the well seat (100) of the well cover (200); a guide cylinder (3) corresponding to the inner part of the guide seat (2) is connected to the outer peripheral wall of the guide seat (2); a limit plate (6) is provided inside the guide seat (2); and a positioning member (4) corresponding to the ratchet (1) and the limit plate (6) is provided inside the guide cylinder (3).

2. The sewage manhole cover fixing device according to claim 1, It is characterized in that The well seat (100) comprises a base (1001) and a matching ring (1002) protruding from the upper end surface of the base (1001), the matching ring (1002) being adapted to correspond to the well cover (200), the ratchet (1) being embedded in the inner peripheral side wall of the base (1001), and the central axis of the ratchet (1) being connected to the base (1001) via a torsion spring (101).

3. The sewage manhole cover fixing device according to claim 1, It is characterized in that The positioning member (4) comprises a guide rod 1 (41) and a guide rod 2 (44), wherein the guide rod 1 (41) and the guide rod 2 (44) are connected via an elastic column (43), the end of the guide rod 1 (41) away from the guide rod 2 (44) is provided with a ratchet pawl (42) adapted to mesh with the ratchet wheel (1), and the end of the guide rod 2 (44) away from the guide rod 1 (41) is provided with a sliding ball (45) adapted to the limit plate (6).

4. The sewage manhole cover fixing device according to claim 3, It is characterized in that The guide rod 1 (41) and the guide rod 2 (44) slide and move in the guide cylinder (3); one end of the guide rod 1 (41) having a ratchet (42) passes through the guide cylinder (3) and the ratchet (42) is arranged outside the guide cylinder (3); one end of the guide rod 2 (44) having a sliding ball (45) slides in and out of the guide seat (2) and the guide cylinder (3).

5. The sewage manhole cover fixing device according to claim 3, It is characterized in that The limiting plate (6) is connected to the guide seat (2) via a rotating rod (5), and the limiting plate (6) comprises a base plate (61) and a plurality of convex seats (62) evenly arranged along the outer circumference of the base plate (61), and a groove (63) is formed between adjacent convex seats (62) of the plurality of convex seats (62); The groove (63) is connected to the convex seat (62) in an arc transition, and the end of the convex seat (62) away from the base plate (61) is in an arc transition. The top end of the convex seat (62) and the bottom end of the groove (63) both have a recessed groove (64) that is inwardly concave and adapted to the sliding ball (45).

6. The sewage manhole cover fixing device according to claim 1, It is characterized in that The upper end surface of the ratchet (1) facing the manhole cover (200) is provided with a baffle (102) which coincides with the central axis of the ratchet (1); along the radial direction between the tooth top circle and the tooth root circle of the ratchet (1), the circumferential wall of the baffle (102) is located between the tooth top circle and the tooth bottom circle of the ratchet (1); and the spacing between the circumferential wall of the baffle (102) and the tooth bottom circle is greater than the spacing between the circumferential wall of the baffle (102) and the tooth top circle.

7. The sewage manhole cover fixing device according to claim 1, It is characterized in that The guide cylinder (3) and the guide seat (2) are of an integrated structure. At least one guide cylinder (3) is provided. The at least one guide cylinder (3) is evenly arranged along the outer peripheral side wall of the guide seat (2). A positioning member (4) is provided in the at least one guide cylinder (3). The inner peripheral side wall of the well seat (100) is provided with ratchets (1) corresponding in number to the guide cylinders (3) and adapted in position.

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