Safety assisted stair

Abstract

The present application relates to the technical field of crawling ladder, and particularly relates to a safe auxiliary stair, which comprises a ladder frame and a mounting assembly. The ladder frame comprises a vertical rod, a handrail and a support pipe. The mounting assembly comprises a connecting rod and a mounting block. The present application realizes the quick fixing of the stair through the original screw hole design on the tail water door. The handrails on both sides of the stair are designed to be retractable, which saves storage space, facilitates transportation and enhances practicability. The mounting assembly can fix the position of the mounting connecting rod when the bolt is connected with the bolt hole on the tail water door, which further simplifies the operation and improves the installation efficiency and stability. The stair material is selected to be stainless steel, which ensures the firmness and durability of the structure and is suitable for use in different environments. The auxiliary stair not only has a simple structure, convenient installation and stable reliability, but also can significantly reduce the psychological pressure and physical burden of the operators, and improve the safety and efficiency of the maintenance work.

Description

Technical Field

[0001] This invention relates to the field of ladder technology, and in particular to a safety auxiliary ladder. Background Technology

[0002] In the maintenance and repair of modern hydroelectric generator units, accessing the tailrace for inspection has always been an important and challenging task. Traditionally, workers are typically guided into the tailrace using soft stairs, but this method requires considerable physical strength and assistance from personnel to hold safety ropes for safety. However, this method is not only inefficient but also poses significant safety hazards, especially when frequent access to the tailrace is necessary. Furthermore, while the introduction of specialized lifting equipment has improved the process to some extent, the lack of lifting points inside the tailrace means that the lifting equipment must still be secured outside the tailrace gate, increasing the complexity and danger of the entry process.

[0003] Especially in the narrow tailrace gate area, access for personnel and equipment becomes more difficult, requiring staff to withstand enormous psychological and physical stress. Furthermore, traditional lifting equipment and staircases lack flexibility and convenience, failing to meet the needs of different work scenarios. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the problem to be solved by this invention is that existing lifting equipment is complicated to operate, has low safety and low efficiency during the maintenance of the tailrace pipe of a hydroelectric generator set.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a safety auxiliary staircase, comprising a ladder frame including uprights, handrails, and support tubes, wherein the handrails are disposed on two of the uprights and the support tubes are disposed at the lower end of the ladder frame; and an installation assembly including a connecting rod and an installation block, wherein one end of the connecting rod is hinged to the upper end of the ladder frame, one end of the installation block is slidably engaged with the connecting rod, and the other end is connected to a bolt hole on the tailgate wall.

[0007] As a preferred embodiment of the safety auxiliary staircase of the present invention, the upright is provided with 4 fixing rings; the handrail is provided with a sleeve and a spring, the sleeve is provided at both ends of the handrail and is sleeved on the upright, and the spring is sleeved on the upright and is provided between the end face of the sleeve and the fixing ring.

[0008] In a preferred embodiment of the safety auxiliary staircase of the present invention, the upright is provided with four fixing pins; the sleeve is provided with a slot, which matches the fixing pins.

[0009] As a preferred embodiment of the safety auxiliary staircase of the present invention, the mounting block includes a housing, a locking element, a trigger element, a bolt, and an unlocking element. The locking element and the trigger element are both disposed inside the housing, the bolt passes through the side wall of the housing, and the unlocking element is disposed on the side of the mounting block.

[0010] As a preferred embodiment of the safety auxiliary staircase of the present invention, the housing is provided with a sleeve, a first column groove, a second column groove, a lower groove, a gear groove, an internal gear groove, a third column groove, a long groove, a square groove, and a through groove. The sleeve is disposed above the housing and slides in cooperation with the connecting rod. The first column groove is disposed in the middle of the housing. The second column groove is disposed on the side wall of the first column groove. The gear groove is connected to the first column groove and its upper end is connected to the inner side of the sleeve. The internal gear groove is disposed on the side wall of the first column groove. The third column groove is connected to the first column groove and penetrates the side wall of the sleeve. The lower groove is disposed below the second column groove and is connected to the second column groove. The upper end of the long groove is connected to the lower groove and its lower end is connected to the square groove. The through groove is connected to the side wall of the square groove and penetrates the side wall of the housing.

[0011] In a preferred embodiment of the safety auxiliary staircase of the present invention, the locking component includes a rack, a rotating component, and a locking post. The rack is disposed below the connecting rod, and the locking post is disposed inside the rotating component. The rotating component includes a rotating cylinder, a fixed rod, a gear, and a sliding sleeve. The rotating cylinder is rotatably engaged with the first column groove, the gear is rotatably engaged with the gear groove, and meshes with the rack. The rotating cylinder and the gear are connected through the fixed rod. The sliding sleeve is sleeved on the outside of the rotating cylinder and slidably engaged with the second column groove.

[0012] In a preferred embodiment of the safety auxiliary staircase of the present invention: the side wall of the rotating cylinder is provided with a straight groove, and one end of the side wall has a notch; the locking post is provided with a spiral groove, a slot, and a toothed block, the spiral groove is provided on the side wall of the locking post, the slot is provided on the end face of the locking post, and the toothed block is slidably engaged with the slot; the toothed block is provided with a protrusion and a second spring, the protrusion is provided above the toothed block, and the second spring is provided between the toothed block and the end face of the slot; the inner wall of the sliding sleeve is provided with a slider, and the slider is slidably engaged with the spiral groove and the straight groove.

[0013] In a preferred embodiment of the safety auxiliary staircase of the present invention, the triggering element slides with the long groove, the triggering element is provided with a semi-ring and a wedge, the semi-ring is provided above the triggering element and slides with the lower groove, and the wedge is provided at the lower end of the triggering element and slides with the long groove.

[0014] In a preferred embodiment of the safety auxiliary staircase of the present invention, the bolt is slidably engaged with the through groove, the bolt is provided with a square block, the square block is rotatably engaged with the bolt, and slidably engaged with the square groove.

[0015] As a preferred embodiment of the safety auxiliary staircase of the present invention, wherein: the unlocking component is rotatably engaged with the third column groove, and is provided with a connecting column and a disengaging plate; the connecting column is provided on the end face of the unlocking component, and the disengaging plate is provided on one end of the connecting column and fits against the end face of the locking column; the end face of the disengaging plate is provided with an inclined groove, and the inclined groove is slidably engaged with the protrusion.

[0016] The beneficial effects of this invention are as follows: This invention achieves rapid fixation of the staircase by utilizing the existing screw hole design on the tailrace gate. The handrails on both sides of the staircase are retractable, saving storage space, facilitating transportation, and enhancing practicality. The installation components ensure that the mounting rod is fixed in position when the bolts are connected to the bolt holes on the tailrace gate, further simplifying operation and improving installation efficiency and stability. The staircase is made of stainless steel, ensuring structural strength and durability, suitable for use in various environments. This auxiliary staircase is not only simple in structure, easy to install, stable and reliable, but also significantly reduces the psychological pressure and physical burden on operators, improving the safety and efficiency of maintenance work. The overall design takes into account practicality and ease of use, and is particularly suitable for the inspection and maintenance of the tailrace pipe of vertical turbines, effectively solving many problems existing in traditional methods. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0018] Figure 1 A scene illustration of a safety auxiliary staircase.

[0019] Figure 2 Structural diagram of the safety auxiliary staircase.

[0020] Figure 3 Structural diagram of the installation components for the safety auxiliary staircase.

[0021] Figure 4 Exploded view of the installation components for the safety auxiliary staircase.

[0022] Figure 5 Exploded view of the rotating components of the safety auxiliary staircase.

[0023] Figure 6 A cross-sectional view of the installation components for the safety auxiliary staircase. Detailed Implementation

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive, either alone or selectively, with other embodiments.

[0027] Example 1

[0028] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a safety auxiliary staircase, which includes a ladder frame 100 and an installation assembly 200.

[0029] Specifically, the ladder frame 100 includes uprights 101, handrails 102, and support pipes 103. The handrails 102 are installed on the two uprights 101, and the support pipes 103 are installed at the lower end of the ladder frame 100. The inner wall of the tailpipe is a tapered pipe. During operation, the function of the support pipes 103 is to prevent the stairs from shaking.

[0030] The mounting assembly 200 includes a connecting rod 201 and a mounting block 202. One end of the connecting rod 201 is hinged to the upper end of the ladder frame 100, and one end of the mounting block 202 is slidably engaged with the connecting rod 201, while the other end is connected to the bolt hole on the tailgate wall.

[0031] Two connecting rods 201 are rotatably sleeved on the crossbar at the upper end of the ladder frame 100. The two connecting rods 201 are detachably connected to the screw holes on the wall of the tailgate through the mounting block 202.

[0032] Specifically, the upright 101 is provided with four fixing rings 101a; the handrail 102 is provided with a sleeve 102a and a spring 102b. The sleeve 102a is provided at both ends of the handrail 102 and is sleeved on the upright 101. The spring 102b is sleeved on the upright 101 and is provided between the end face of the sleeve 102a and the fixing ring 101a.

[0033] Specifically, the upright 101 is provided with four fixing pins 101b; the sleeve 102a is provided with a slot 102c, which matches the fixing pins 101b.

[0034] A slotted groove, spring 102b, and fixing pin 101b enable manual rotation and positioning of sleeve 102a. Sleeve 102a is welded to handrail 102 via an elbow. This allows handrail 102 to be manually opened during stair use and manually retracted after use, saving storage space. Notably, to ensure complete retraction of both handrails 102 after use, the two sides are intentionally designed asymmetrically. Specifically, on one side, sleeve 102a is directly welded to the elbow, which is then welded to the handrail; on the other side, sleeve 102a is first welded to a straight steel pipe, which is then welded to the elbow, which is then welded to the handrail. This avoids interference when the handrails are retracted. This achieves complete retraction and extension of the handrail.

[0035] Example 2

[0036] Reference Figures 1-6 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0037] Specifically, the mounting block 202 includes a housing 203, a locking element 204, a trigger element 205, a bolt 202a, and an unlocking element 207. The locking element 204 and the trigger element 205 are both located inside the housing 203. The bolt 202a penetrates the side wall of the housing 203. The unlocking element 207 is located on the side of the mounting block 202.

[0038] Locking component 204 locks the mounting block 202 in position on the connecting rod 201. Before locking on the connecting rod 201, the mounting block 202 can slide to accommodate tailgates of different thicknesses. Bolt 202a connects the mounting block 202 to the tailgate. When bolt 202a is fixed, trigger component 205 synchronously drives locking component 204 to lock the position of mounting block 202, preventing instability of the stairs when people use them. Unlocking component 207 unlocks locking component 204 when the stairs are disassembled.

[0039] Specifically, the housing 203 is provided with a sleeve 203a, a first groove 203b, a second groove 203c, a lower groove 203d, a gear groove 203e, an internal gear groove 203f, a third groove 203g, a long groove 203h, a square groove 203i, and a through groove 203j. The sleeve 203a is located on the top of the housing 203 and slides with the connecting rod 201. The first groove 203b is located in the middle of the housing 203, and the second groove 203c is located on the side wall of the first groove 203b. The gear groove 203e is connected to the first groove. 203b is connected, the upper end of gear groove 203e is connected to the inner side of sleeve 203a, internal gear groove 203f is set on the side wall of the first column groove 203b, the third column groove 203g is connected to the first column groove 203b and penetrates the side wall of sleeve 203a, the lower groove 203d is set below the second column groove 203c and is connected to the second column groove 203c, the upper end of long groove 203h is connected to lower groove 203d and the lower end is connected to square groove 203i, and through groove 203j is connected to the side wall of square groove 203i and penetrates the side wall of housing 203;

[0040] It is worth noting that the first groove 203b, the second groove 203c, the gear groove 203e, the internal gear groove 203f, and the third groove 203g are all coaxially arranged, and the side wall of the internal gear groove 203f is provided with a tooth block.

[0041] Specifically, the locking component 204 includes a rack 204a, a rotating component 206, and a locking pin 204b. The rack 204a is located below the connecting rod 201, and the locking pin 204b is located inside the rotating component 206. The rotating component 206 includes a rotating cylinder 206a, a fixed rod 206b, a gear 206d, and a sliding sleeve 206e. The rotating cylinder 206a is rotatably engaged with the first groove 203b, and the gear 206d is rotatably engaged with the gear groove 203e and meshes with the rack 204a. The rotating cylinder 206a and the gear 206d are connected by the fixed rod 206b. The sliding sleeve 206e is sleeved on the outside of the rotating cylinder 206a and is slidably engaged with the second groove 203c.

[0042] The rack 204a cooperates with the gear 206d. When the mounting block 202 moves on the connecting rod 201, the rack 204a will drive the gear 206d to rotate. The mounting block 202 can be locked on the connecting rod 201 simply by fixing the rotation of the gear 206d. It is worth noting that the end face of the locking pin 204b is flush with the end face of the rotating cylinder 206a.

[0043] Specifically, the rotating drum 206a has a straight groove 206f on its side wall and a notch 206c on one end of its side wall; the locking pin 204b has a spiral groove 204c, a slot 204d, and a toothed block 204e. The spiral groove 204c is located on the side wall of the locking pin 204b, the slot 204d is located on the end face of the locking pin 204b, and the toothed block 204e slides in conjunction with the slot 204d; the toothed block 204e has a protrusion 204f and a second spring 204g. The protrusion 204f is located above the toothed block 204e, and the second spring 204g is located between the end face of the toothed block 204e and the slot 204d; the inner wall of the sliding sleeve 206e has a slider 206i, which slides in conjunction with the spiral groove 204c and the straight groove 206f.

[0044] In the initial state, the notch 206c is misaligned with the slot 204d, and the toothed block 206h is obstructed by the inner wall of the rotating cylinder 206a, causing the second spring 206g to be in a compressed state. The toothed block 206h is completely located within the slot 204d. It is worth noting that a spring (not shown in the figure) should be provided between the sliding sleeve 206e and the rotating cylinder 206a to ensure that in the initial state, the slider 206i is located at one end of the spiral groove 204c and the straight groove 206f. At this time, the slot 204d and the toothed block 206h are misaligned. It is worth noting that the size of the notch 206c matches the width of the slot 204d, and the outer side of the toothed block 204e can mesh with the inner wall toothed block of the inner toothed groove 203f.

[0045] Specifically, the trigger 205 is slidably engaged with the long groove 203h. The trigger 205 is provided with a semi-ring 205a and a wedge 205b. The semi-ring 205a is located above the trigger 205 and is slidably engaged with the lower groove 203d. The wedge 205b is located at the lower end of the trigger 205 and is slidably engaged with the long groove 203h. The side wall of the semi-ring 205a is provided with an inclined surface 205c.

[0046] It is worth noting that a spring (not shown in the figure) can be installed between the trigger 205 and the long groove 203h. In the initial state, the wedge 205b is located in the square groove 203i, and the semi-ring 205a is located in the lower groove 203d. At this time, the upper end of the inclined surface 205c is in contact with the lower part of the sliding sleeve 206e.

[0047] Specifically, bolt 202a is in sliding fit with through groove 203j, and bolt 202a is provided with block 202b. Block 202b is in rotatable fit with bolt 202a and in sliding fit with square groove 203i.

[0048] In the initial state, one end of bolt 202a does not protrude from the through groove 203j. At this time, the inclined surface of block 202b is in contact with the inclined surface of wedge 205b. When bolt 202a is connected to the bolt hole on the tailgate, block 202b moves within the square groove 203i, thereby pressing wedge 205b, causing trigger 205 to move upward. Inclined surface 205c then presses against sliding sleeve 206e. At this time, since the positions of mounting block 202 and connecting rod 201 are fixed, therefore... The rotating drum 206a stops rotating, so the sliding sleeve 206e only moves axially. Under the action of the slider 206i, the spiral groove 204c, and the straight groove 206f, the locking pin 204b rotates. When the slot 204d rotates to coincide with the notch 206c, under the action of the second spring 204g, the tooth block 204e moves into the inner tooth groove 203f and meshes with the tooth block on the side wall of the inner tooth groove 203f. At this time, the locking of the gear 206d is completed.

[0049] Specifically, the unlocking component 207 is rotatably engaged with the third column groove 203g, and is provided with a receiving post 207a and a disengaging plate 207b. The receiving post 207a is located on the end face of the unlocking component 207, and the disengaging plate 207b is located at one end of the receiving post 207a and fits against the end face of the locking post 204b. The end face of the disengaging plate 207b is provided with a slanted groove 207c, which slides with the protrusion 204f.

[0050] In the initial state, the protrusion 204f is located at the end of the inclined groove 207c away from the axis. When the gear 206d rotates, the disengagement disc 207b will rotate with it. When locked, the protrusion 204f moves to the end of the inclined groove closer to the axis. When unlocking is required, simply rotate the unlocking part 207 to make the protrusion 204f move back to the end of the inclined groove 207c away from the axis. At this time, the tooth block 204e is reset, and the locking part 204 can be unlocked. Then, rotate the bolt 202a to complete the disassembly of the stairs.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A safety auxiliary staircase, characterized in that: include, A ladder frame (100) includes uprights (101), handrails (102), and support tubes (103). The handrails (102) are mounted on two uprights (101), and the support tubes (103) are mounted at the lower end of the ladder frame (100). The installation assembly (200) includes a connecting rod (201) and an installation block (202). One end of the connecting rod (201) is hinged to the upper end of the ladder frame (100), and one end of the installation block (202) is slidably engaged with the connecting rod (201), while the other end is connected to the bolt hole on the tailgate wall. The mounting block (202) includes a housing (203), a locking element (204), a trigger element (205), a bolt (202a), and an unlocking element (207). The locking element (204) and the trigger element (205) are both disposed inside the housing (203). The bolt (202a) penetrates the side wall of the housing (203). The unlocking element (207) is disposed on the side of the mounting block (202). The housing (203) is provided with a sleeve (203a), a first groove (203b), a second groove (203c), a lower groove (203d), a gear groove (203e), an internal gear groove (203f), a third groove (203g), a long groove (203h), a square groove (203i), and a through groove (203j). The sleeve (203a) is located on the top of the housing (203) and slides in cooperation with the connecting rod (201). The first groove (203b) is located in the middle of the housing (203), and the second groove (203c) is located on the side wall of the first groove (203b). The gear groove (203e) is connected to the first groove (203b). The gear groove (203e) is connected to the inner side of the sleeve (203a) at its upper end. The internal gear groove (203f) is disposed on the side wall of the first column groove (203b). The third column groove (203g) is connected to the first column groove (203b) and penetrates the side wall of the sleeve (203a). The lower groove (203d) is disposed below the second column groove (203c) and is connected to the second column groove (203c). The upper end of the long groove (203h) is connected to the lower groove (203d) and the lower end is connected to the square groove (203i). The through groove (203j) is connected to the side wall of the square groove (203i) and penetrates the side wall of the housing (203). The locking component (204) includes a rack (204a), a rotating component (206), and a locking pin (204b). The rack (204a) is disposed below the connecting rod (201), and the locking pin (204b) is disposed inside the rotating component (206). The rotating component (206) includes a rotating cylinder (206a), a fixed rod (206b), a gear (206d), and a sliding sleeve (206e). The rotating cylinder (206a) is rotatably engaged with the first column groove (203b), the gear (206d) is rotatably engaged with the gear groove (203e) and meshes with the rack (204a). The rotating cylinder (206a) and the gear (206d) are connected through the fixed rod (206b). The sliding sleeve (206e) is sleeved on the outside of the rotating cylinder (206a) and is slidably engaged with the second column groove (203c). The rotating drum (206a) has a straight groove (206f) on its side wall and a notch (206c) on one end of its side wall. The locking post (204b) is provided with a spiral groove (204c), a slot (204d), and a toothed block (204e). The spiral groove (204c) is provided on the side wall of the locking post (204b), the slot (204d) is provided on the end face of the locking post (204b), and the toothed block (204e) slides in engagement with the slot (204d). The toothed block (204e) is provided with a protrusion (204f) and a second spring (204g). The protrusion (204f) is located above the toothed block (204e), and the second spring (204g) is located between the toothed block (204e) and the end face of the slot (204d). The inner wall of the sliding sleeve (206e) is provided with a slider (206i), and the slider (206i) slides in cooperation with the spiral groove (204c) and the straight groove (206f); The trigger (205) is slidably engaged with the long groove (203h). The trigger (205) is provided with a semi-ring (205a) and a wedge (205b). The semi-ring (205a) is located above the trigger (205) and is slidably engaged with the lower groove (203d). The wedge (205b) is located at the lower end of the trigger (205) and is slidably engaged with the long groove (203h). The sidewall of the semi-ring (205a) is provided with an inclined surface (205c).

2. The safety auxiliary staircase as described in claim 1, characterized in that: The upright (101) is provided with four fixing rings (101a); The handrail (102) is provided with a sleeve (102a) and a spring (102b). The sleeve (102a) is located at both ends of the handrail (102) and is sleeved on the upright (101). The spring (102b) is sleeved on the upright (101) and is located between the end face of the sleeve (102a) and the fixing ring (101a).

3. The safety auxiliary staircase as described in claim 2, characterized in that: The upright (101) is provided with four fixing pins (101b). The sleeve (102a) is provided with a slot (102c), which matches the fixing pin (101b).

4. The safety auxiliary staircase as described in claim 3, characterized in that: The bolt (202a) is slidably engaged with the through groove (203j), and the bolt (202a) is provided with a block (202b). The block (202b) is rotatably engaged with the bolt (202a) and slidably engaged with the square groove (203i).

5. The safety auxiliary staircase as described in claim 4, characterized in that: The unlocking component (207) is rotatably engaged with the third column groove (203g) and is provided with a receiving post (207a) and a disengaging plate (207b). The receiving post (207a) is disposed on the end face of the unlocking component (207), and the disengaging plate (207b) is disposed at one end of the receiving post (207a) and is in contact with the end face of the locking post (204b). The end face of the detachment disc (207b) is provided with a groove (207c), and the groove (207c) slides in conjunction with the protrusion (204f).

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