Leveling self-locking device for dam body maintenance platform

Abstract

The utility model discloses a leveling self-locking device for a dam body maintenance platform, which comprises a leveling oil cylinder, a self-locking plate, a self-locking seat and an opening and closing mechanism, the leveling oil cylinder is used for being hinged with a base shaft, and a push rod of the leveling oil cylinder is used for being hinged with a maintenance platform shaft; the self-locking plate is connected with the end, away from the leveling oil cylinder, of the push rod, the self-locking plate and the push rod are arranged in parallel, the self-locking plate is provided with a plurality of racks, and the racks and the push rod are arranged in parallel. The self-locking seat is provided with a plurality of tooth grooves, the tooth grooves are in one-to-one correspondence with the racks, and when the racks are meshed with the corresponding tooth grooves, the leveling oil cylinder and the push rod are axially locked; the self-locking seat is connected with the leveling oil cylinder through an opening and closing mechanism, and the opening and closing mechanism can enable the tooth groove to be meshed with or separated from the rack. The problem that an oil cylinder supporting maintenance platform can fail can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance of hydropower stations, in particular to a leveling self-locking device for a dam maintenance platform. Background Art

[0002] Due to long-term operation, the walls of the dam body flood discharge channel will be eroded and worn to varying degrees, and regular maintenance is required. During maintenance, due to the limitations of construction conditions and the constraints of the construction environment, it is generally necessary to temporarily set up a maintenance platform to carry out maintenance work on the flood discharge channel. However, the cost of temporarily setting up a maintenance platform is high and the efficiency is low. Therefore, it is considered to use a mobile vehicle as a base to carry the maintenance platform.

[0003] Since the flood discharge surface hole flow channel has a slope, and the slope is not necessarily the same at different locations, the mobile vehicle will tilt when moving along the flood discharge surface hole flow channel, causing the maintenance platform to tilt as well, making it impossible for maintenance personnel to stand steadily.

[0004] Therefore, the prior art generally hinges the maintenance platform to the top of the mobile vehicle serving as the base, and then sets a cylinder between the two, so that the tail end of the cylinder is hinged to the base, and the push rod is hinged to the maintenance platform, so that the maintenance platform and the base can be relatively rotated by extending and retracting the cylinder push rod to adjust the angle between the two, thereby leveling the maintenance platform.

[0005] However, in actual use, since the maintenance platform (and the maintenance personnel thereon) are very heavy, relying solely on the oil cylinder to continuously support the maintenance platform can easily lead to oil cylinder failure or even failure, which in turn causes the maintenance platform to tip over instantly, posing a huge safety hazard. Utility Model Content

[0006] The utility model aims to provide a leveling self-locking device for a dam body maintenance platform, which can solve the problem that the oil cylinder supporting the maintenance platform may fail.

[0007] The utility model is realized by the following technical solutions:

[0008] A leveling self-locking device for a dam maintenance platform comprises a leveling cylinder, the leveling cylinder is used to hinge with a base axis, and a push rod of the leveling cylinder is used to hinge with the maintenance platform axis; a self-locking plate, the self-locking plate is connected to an end of the push rod away from the leveling cylinder, and the self-locking plate is arranged in parallel with the push rod, the self-locking plate is provided with a plurality of racks, and the racks are arranged in parallel with the push rod; a self-locking seat, the self-locking seat is provided with a plurality of tooth grooves, the tooth grooves correspond to the racks one by one, when the racks are engaged with the corresponding tooth grooves, the leveling cylinder and the push rod are axially locked; an opening and closing mechanism, the self-locking seat is connected to the leveling cylinder via the opening and closing mechanism, and the opening and closing mechanism can make the tooth grooves engage or disengage with the racks.

[0009] Optionally, the opening and closing mechanism includes an articulated shaft, and the self-locking seat and the leveling cylinder are hinged through the articulated shaft; the self-locking seat is provided with a planar self-locking surface, and the tooth groove is provided on the side of the self-locking surface facing the self-locking plate; when the self-locking surface is parallel to the self-locking plate, the tooth groove engages with the corresponding rack; when the self-locking surface and the self-locking plate form a preset angle, the tooth groove disengages from the rack.

[0010] Optionally, the opening and closing mechanism also includes a return torsion spring, which is sleeved on the hinge shaft, one end of the return torsion spring is connected to the self-locking seat, and the other end is connected to the leveling cylinder; the rack and the tooth groove are one-way stuck, and when the return torsion spring is in a natural state, the tooth groove is meshed and squeezed with the rack; when the push rod is retracted, the rack and the tooth groove are meshed and stuck; when the push rod is extended, each single tooth of the rack squeezes the corresponding single groove of the meshing tooth groove, so that the self-locking seat resists the return torsion spring and rotates around the hinge shaft until any one of the single teeth jumps into the next single groove.

[0011] Optionally, the single groove is a right-angled trapezoidal groove, the groove wall of the single groove facing the tail end of the leveling cylinder is perpendicular to the self-locking surface, and the groove wall away from the tail end of the leveling cylinder is inclined; the single tooth matches the shape of the single groove.

[0012] Optionally, the tail end of the leveling cylinder is hinged to the base through the hinge shaft.

[0013] Optionally, the self-locking seat includes a pair of side plates and a connecting plate, the two side plates are arranged in parallel and connected by the connecting plate, the connecting plate is arranged perpendicular to the side plates, and the outer surface of the connecting plate is the self-locking surface; the side plate is a rectangular plate, the length of the side plate is slightly longer than the length of the leveling cylinder, the width of the side plate is slightly wider than the length direction of the leveling cylinder, and one end of the side plate is hinged to the tail end of the leveling cylinder through the hinge shaft, so that the self-locking seat cover is arranged outside the leveling cylinder.

[0014] Optionally, when the self-locking seat rotates to the inner surface of the connecting plate to abut against the leveling cylinder, the tooth groove and the rack are in a disengaged state.

[0015] Optionally, a support rod is vertically provided on one side of the self-locking plate close to the tail end of the leveling cylinder, and the end of the support rod away from the self-locking plate is slidably connected to the side wall of the leveling cylinder; the length of the connecting plate is shorter than the length of the side plate, and the side plate is connected to the connecting plate close to the head end of the leveling cylinder.

[0016] Optionally, the side panel is provided with a swing arm handle at the hinge axis.

[0017] Optionally, the opening and closing mechanism also includes a ratchet, a pawl and a stopper, the ratchet is arranged parallel to the outer wall of the side plate and coaxially with the hinge axis; the pawl is hinged to the base axis through an engaging torsion spring, and when the engaging torsion spring is in a natural state, the pawl engages and squeezes the ratchet; the stopper is detachably connected to the base, and the stopper is used to prevent the pawl from engaging with the ratchet.

[0018] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0019] The utility model provides a leveling self-locking device for a dam body maintenance platform. By setting a leveling oil cylinder, a basic leveling function is realized. On this basis, a self-locking plate and a self-locking seat are set, and racks and tooth grooves are respectively set on the two. The meshing and clamping connection of the rack and the tooth groove is used to lock the push rod and the leveling oil cylinder axially. The meshing and clamping connection of the rack and the tooth groove replaces the direct support of the leveling oil cylinder. On the one hand, the weight of the maintenance platform borne by the leveling oil cylinder is shared. On the other hand, when the leveling oil cylinder fails or fails, the meshing and clamping connection of the rack and the tooth groove is used to replace the direct support of the leveling oil cylinder. The invention can support the leveling cylinder to effectively avoid the instantaneous tipping of the maintenance platform, thereby avoiding the occurrence of danger; on this basis, an opening and closing mechanism is provided to realize the engagement or disengagement of the rack and the tooth groove. When the push rod needs to be telescopically adjusted, the opening and closing mechanism is first used to disengage the rack and the tooth groove. After the push rod is adjusted, the opening and closing mechanism is used to engage the rack and the tooth groove. Through the mutual cooperation of the above-mentioned features, the leveling self-locking device for the dam maintenance platform can effectively solve the problem of failure of the cylinder supporting the maintenance platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0021] Figure 1 A schematic diagram of the use of the leveling self-locking device for the dam maintenance platform provided by the embodiment of the utility model;

[0022] Figure 2 A side cross-sectional schematic diagram of a push rod of a leveling self-locking device for a dam maintenance platform provided by an embodiment of the utility model when it is retracted;

[0023] Figure 3 A side cross-sectional schematic diagram of a push rod of a leveling self-locking device for a dam maintenance platform provided by an embodiment of the utility model when it is extended;

[0024] Figure 4A side cross-sectional schematic diagram of a push rod of a leveling self-locking device for a dam maintenance platform provided by an embodiment of the utility model before it is retracted;

[0025] Figure 5 A schematic diagram of the installation position of a leveling self-locking device for a dam maintenance platform provided in an embodiment of the utility model.

[0026] Marks and corresponding parts names in the attached drawings:

[0027] 1-base; 2-maintenance platform; 10-leveling cylinder; 11-push rod; 20-self-locking plate; 21-rack; 22-support rod; 30-self-locking seat; 301-side plate; 3011-swing arm handle; 302-connecting plate; 31-tooth groove; 32-self-locking surface; 40-hinge shaft; 41-reset torsion spring; 42-ratchet; 43-pawl; 44-engaging torsion spring; 45-stopper. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0029] First, please refer to Figure 5 , the installation position of the existing leveling cylinder 10 is fully demonstrated, and by adjusting the length of the leveling cylinder 10, the maintenance platform 2 can be driven to rotate relative to the base 1 to achieve the leveling of the maintenance platform 2. In the subsequent embodiments, the setting position and connection relationship of the leveling cylinder 10 are the same as those of the above-mentioned prior art.

[0030] Example

[0031] Please refer to Figures 1 to 4 The present embodiment provides a self-locking device for leveling a dam maintenance platform, including a leveling cylinder 10, the leveling cylinder 10 is used to hinge with a base 1, and a push rod 11 of the leveling cylinder 10 is used to hinge with a maintenance platform 2; the second embodiment includes a self-locking plate 20, the self-locking plate 20 is connected to an end of the push rod 11 away from the leveling cylinder 10, and the self-locking plate 20 is arranged in parallel with the push rod 11, and the self-locking plate 20 is provided with a plurality of racks 21, and the racks 21 are connected to the leveling cylinder 10. The push rod 11 is arranged in parallel; the third includes a self-locking seat 30, and the self-locking seat 30 is provided with a plurality of tooth grooves 31, and the tooth grooves 31 correspond to the rack 21 one by one. When the rack 21 is engaged with the corresponding tooth grooves 31, the leveling cylinder 10 and the push rod 11 are axially locked; the fourth includes an opening and closing mechanism, and the self-locking seat 30 is connected to the leveling cylinder 10 through the opening and closing mechanism, and the opening and closing mechanism can make the tooth grooves 31 engage or disengage with the rack 21.

[0032] The leveling self-locking device for the dam body maintenance platform provided in this embodiment realizes the basic leveling function by setting the leveling cylinder 10. On this basis, by setting the self-locking plate 20 and the self-locking seat 30, and setting the rack 21 and the tooth groove 31 respectively on the two, the push rod 11 and the leveling cylinder 10 are axially locked by the meshing connection of the rack 21 and the tooth groove 31, so as to replace the direct support of the leveling cylinder 10 with the meshing connection of the rack 21 and the tooth groove 31. On the one hand, the weight of the maintenance platform 2 borne by the leveling cylinder 10 is shared. On the other hand, when the leveling cylinder 10 fails or fails, the rack 21 and the tooth groove 31 are used to lock the push rod 11 and the leveling cylinder 10 axially. The meshing and snapping replaces the support of the leveling cylinder 10, which effectively prevents the maintenance platform 2 from tipping over instantly, thereby avoiding the occurrence of danger; on this basis, an opening and closing mechanism is provided to realize the meshing or disengagement of the rack 21 and the tooth groove 31. When the push rod 11 needs to be telescopically adjusted, the opening and closing mechanism is first used to disengage the rack 21 and the tooth groove 31. After the adjustment of the push rod 11 is completed, the opening and closing mechanism is used to mesh and snap the rack 21 and the tooth groove 31; through the mutual cooperation of the above-mentioned features, the leveling self-locking device for the dam maintenance platform 2 can effectively solve the problem of failure of the cylinder supporting the maintenance platform 2.

[0033] In order to further explain the specific structure of the opening and closing mechanism, the opening and closing mechanism includes an articulated shaft 40, and the self-locking seat 30 and the leveling cylinder 10 are hinged through the articulated shaft 40; the self-locking seat 30 is provided with a planar self-locking surface 32, and the tooth groove 31 is provided on the side of the self-locking surface 32 facing the self-locking plate 20; when the self-locking surface 32 is parallel to the self-locking plate 20, the tooth groove 31 is engaged with the corresponding rack 21; when the self-locking surface 32 and the self-locking plate 20 are at a preset angle, the tooth groove 31 is disengaged from the rack 21.

[0034] Through the above arrangement, when it is necessary to disengage the rack 21 and the tooth groove 31, the self-locking seat 30 is rotated with the hinge shaft 40 as the axis to make the self-locking surface 32 gradually move away from the self-locking plate 20, so that the tooth groove 31 can gradually move away from the rack 21, and finally the tooth groove 31 is disengaged from the rack 21. When it is necessary to engage the two, it is only necessary to rotate the self-locking seat 30 in the opposite direction.

[0035] In order to prevent the push rod 11 from failing during the extension process, causing the maintenance platform 2 to tip over, the opening and closing mechanism also includes a reset torsion spring 41, which is sleeved on the hinge shaft 40, one end of the reset torsion spring 41 is connected to the self-locking seat 30, and the other end is connected to the leveling cylinder 10; the rack 21 and the tooth groove 31 are one-way stuck, and when the reset torsion spring 41 is in a natural state, the tooth groove 31 is meshed and squeezed with the rack 21; when the push rod 11 is retracted, the rack 21 is meshed and stuck with the tooth groove 31; when the push rod 11 is extended, each single tooth of the rack 21 squeezes the corresponding single groove of the meshing tooth groove 31, so that the self-locking seat 30 resists the reset torsion spring 41, and rotates around the hinge shaft 40 until any one of the single teeth jumps into the next single groove.

[0036] Through the above arrangement, when the push rod 11 is gradually extended, the single tooth cyclically moves in the order of falling into the single groove, squeezing the single groove to make the self-locking seat 30 unscrew against the reset torsion spring 41, and the single tooth falling into the next single groove. When the push rod 11 fails, the single tooth can be quickly inserted into the previous single groove under the action of the reset torsion spring 41 regardless of its position, so as to replace the leveling cylinder 10 for support by means of meshing and clamping, thereby preventing the maintenance platform 2 from tipping over.

[0037] In order to further describe the specific structure of the one-way locking of the rack 21 and the tooth groove 31, the single groove is a right-angled trapezoidal groove, the groove wall of the single groove facing the tail end of the leveling cylinder 10 is perpendicular to the self-locking surface 32, and the groove wall away from the tail end of the leveling cylinder 10 is inclined; the single tooth matches the shape of the single groove.

[0038] In order to prevent the self-locking seat 30 and the leveling cylinder 10 from gradually losing the parallel state during the rotation of the leveling cylinder 10 , the tail end of the leveling cylinder 10 is hinged to the base 1 through the hinge shaft 40 .

[0039] In order to further explain the specific structure of the self-locking seat 30, the self-locking seat 30 includes a pair of side panels 301 and a connecting plate 302. The two side panels 301 are arranged in parallel and connected by the connecting plate 302. The connecting plate 302 is arranged perpendicular to the side panels 301, and the outer surface of the connecting plate 302 is the self-locking surface 32; the side panel 301 is a rectangular plate, the length of the side panel 301 is slightly longer than the length of the leveling cylinder 10, and the width of the side panel 301 is slightly wider than the diameter of the leveling cylinder 10; one end of the side panel 301 in the length direction is hinged to the tail end of the leveling cylinder 10 through the hinge shaft 40, so that the self-locking seat 30 is covered outside the leveling cylinder 10.

[0040] Preferably, in order to achieve effective limiting, when the self-locking seat 30 rotates to the inner surface of the connecting plate 302 to abut against the leveling cylinder 10, the tooth groove 31 and the rack 21 are in a disengaged state.

[0041] In order to prevent the self-locking plate 20 from unnecessary deformation, a support rod 22 is vertically provided on one side of the self-locking plate 20 close to the tail end of the leveling cylinder 10, and the end of the support rod 22 away from the self-locking plate 20 is slidably connected to the side wall of the leveling cylinder 10; the length of the connecting plate 302 is shorter than the length of the side plate 301, and the side plate 301 is connected to the connecting plate 302 close to the head end of the leveling cylinder 10.

[0042] In order to facilitate the rotation of the self-locking seat 30 , the side plate 301 is provided with a rotary arm handle 3011 at the hinge shaft 40 .

[0043] In order to maintain the disengaged state of the rack 21 and the gear 31, the opening and closing mechanism also includes a ratchet 42, a pawl 43 and a stopper 45. The ratchet 42 is arranged parallel to the outer wall of the side panel 301 and is coaxially arranged with the hinge shaft 40; the pawl 43 is hinged to the base 1 through an engaging torsion spring 44, and when the engaging torsion spring 44 is in a natural state, the pawl 43 engages and squeezes the ratchet 42; the stopper 45 is detachably connected to the base 1, and the stopper 45 is used to prevent the pawl 43 from engaging with the ratchet 42.

[0044] When the self-locking seat 30 is manually turned to the disengaged position, the stopper 45 is pulled out to engage the pawl 43 with the ratchet 42 to maintain the disengaged state; when adjustment is required again, the pawl 43 is manually opened and the stopper 45 is inserted back to block the pawl 43.

[0045] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A self-locking device for leveling a dam maintenance platform, characterized in that: include: A leveling cylinder (10), the leveling cylinder (10) is used to hinge with the base, and a push rod (11) of the leveling cylinder (10) is used to hinge with the maintenance platform; A self-locking plate (20), the self-locking plate (20) being connected to an end of the push rod (11) away from the leveling cylinder (10), and the self-locking plate (20) being arranged in parallel with the push rod (11), the self-locking plate (20) being provided with a plurality of racks (21), and the racks (21) being arranged in parallel with the push rod (11); A self-locking seat (30), wherein the self-locking seat (30) is provided with a plurality of tooth grooves (31), wherein the tooth grooves (31) correspond to the racks (21) one by one, and when the racks (21) are meshed with the corresponding tooth grooves (31), the leveling cylinder (10) and the push rod (11) are axially locked; An opening and closing mechanism, wherein the self-locking seat (30) is connected to the leveling oil cylinder (10) via the opening and closing mechanism, and the opening and closing mechanism can make the tooth groove (31) engage with or disengage from the rack (21).

2. The leveling self-locking device for the dam maintenance platform according to claim 1 is characterized in that: The opening and closing mechanism comprises a hinge shaft (40), and the self-locking seat (30) and the leveling oil cylinder (10) are hinged via the hinge shaft (40); The self-locking seat (30) is provided with a planar self-locking surface (32), and the tooth groove (31) is provided on a side of the self-locking surface (32) facing the self-locking plate (20); When the self-locking surface (32) is parallel to the self-locking plate (20), the tooth groove (31) is meshed with the corresponding rack (21); When the self-locking surface (32) and the self-locking plate (20) form a preset angle, the tooth groove (31) and the rack (21) are disengaged.

3. The leveling self-locking device for the dam maintenance platform according to claim 2 is characterized in that: The opening and closing mechanism further comprises a return torsion spring (41), wherein the return torsion spring (41) is sleeved on the hinge shaft (40), one end of the return torsion spring (41) is connected to the self-locking seat (30), and the other end is connected to the leveling oil cylinder (10); The rack (21) and the tooth groove (31) are locked in one direction. When the return torsion spring (41) is in a natural state, the tooth groove (31) is meshed with and squeezed by the rack (21); When the push rod (11) is retracted, the rack (21) is meshed and locked with the tooth groove (31); When the push rod (11) is extended, each single tooth of the rack (21) squeezes the corresponding single groove of the meshing tooth groove (31) so that the self-locking seat (30) resists the reset torsion spring (41) and rotates around the hinge shaft (40) until any single tooth jumps into the next single groove.

4. The leveling self-locking device for the dam maintenance platform according to claim 3 is characterized in that: The single groove is a right-angled trapezoidal groove, the groove wall of the single groove facing the tail end of the leveling oil cylinder (10) is perpendicular to the self-locking surface (32), and the groove wall away from the tail end of the leveling oil cylinder (10) is inclined; The single tooth matches the shape of the single groove.

5. The leveling self-locking device for the dam maintenance platform according to claim 4 is characterized in that: The tail end of the leveling oil cylinder (10) is hinged to the base through the hinge shaft (40).

6. The leveling self-locking device for the dam maintenance platform according to claim 5, characterized in that: The self-locking seat (30) comprises a pair of side plates (301) and a connecting plate (302), the two side plates (301) are arranged in parallel and connected by the connecting plate (302), the connecting plate (302) is arranged perpendicular to the side plates (301), and the outer surface of the connecting plate (302) is the self-locking surface (32); The side plate (301) is a rectangular plate, the length of the side plate (301) is slightly longer than the length of the leveling cylinder (10), and the width of the side plate (301) is slightly wider than the diameter of the leveling cylinder (10); One end of the side plate (301) in the length direction is hinged to the tail end of the leveling cylinder (10) through the hinge shaft (40), so that the self-locking seat (30) is covered outside the leveling cylinder (10).

7. The leveling self-locking device for the dam maintenance platform according to claim 6, characterized in that: When the self-locking seat (30) rotates to the inner surface of the connecting plate (302) to abut against the leveling oil cylinder (10), the tooth groove (31) and the rack (21) are in a disengaged state.

8. The leveling self-locking device for the dam maintenance platform according to claim 6, characterized in that: A support rod (22) is vertically provided on one side of the self-locking plate (20) close to the rear end of the leveling cylinder (10), and an end of the support rod (22) away from the self-locking plate (20) is slidably connected to the side wall of the leveling cylinder (10); The length of the connecting plate (302) is shorter than that of the side plate (301), and the side plate (301) is connected to the connecting plate (302) near the head end of the leveling cylinder (10).

9. The leveling self-locking device for the dam maintenance platform according to claim 6, characterized in that: The side plate (301) is provided with a rotary arm handle (3011) at the hinge shaft (40).

10. The leveling self-locking device for the dam maintenance platform according to claim 9, characterized in that: The opening and closing mechanism further comprises a ratchet (42), a ratchet pawl (43) and a stopper (45); the ratchet (42) is arranged parallel to the outer wall of the side plate (301) and is coaxially arranged with the hinge shaft (40); The ratchet pawl (43) is hinged with the base axis through an engagement torsion spring (44); when the engagement torsion spring (44) is in a natural state, the ratchet pawl (43) is engaged with and squeezed by the ratchet wheel (42); The blocking member (45) is detachably plugged into the base, and the blocking member (45) is used to prevent the pawl (43) from meshing with the ratchet wheel (42).

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