Folding type shaft emergency escape structure

Abstract

The utility model discloses a folding type shaft emergency escape structure which comprises a folding pedal mechanism, the folding pedal mechanism is arranged on the inner wall of a shaft, and a platform mechanism is arranged at one end of the folding pedal mechanism. The platform mechanism is fixedly connected with the side wall of the shaft, the front end of the platform mechanism communicates with a safety stair channel arranged at the front end of the side wall of the shaft, a supporting piece used for supporting the folding pedal mechanism is arranged at the bottom of the other end of the folding pedal mechanism, and the supporting piece is located on one side of the escape stair channel; the folding pedal mechanism comprises a pedal part, a guardrail assembly and a traction control assembly, the pedal part is in a rectangular plate shape, one end of the pedal part in the width direction is connected with the inner wall of the shaft through a pin shaft, and the other end of the pedal part in the width direction is connected with the bottom end of the guardrail assembly through a pin shaft. The traction control assembly is connected with the pedal piece and the inner wall of the shaft and controls the pedal piece to be folded and unfolded.

Description

Technical Field

[0001] The utility model relates to the field of coal mining, in particular to a foldable shaft emergency escape structure. Background Art

[0002] In the central pump room of the vertical shaft, a safety staircase passage is set on one side for construction workers to enter and exit the mine, and an escape staircase passage for emergency escape is set on the other side. The middle part is the up and down lifting space for the main and auxiliary tank cages. Since it cannot cause obstruction to the up and down lifting space of the tank cages, there is no connecting passage between the safety staircase passage and the escape staircase passage in the existing central pump room structure. When encountering danger in the mine, it is impossible to go to another staircase passage through the connecting passage for quick escape, posing a threat to the life safety of the construction workers.

[0003] Patent No. ZL202122903996.5 discloses a safety escape ladder device for a ventilated pedestrian underground shaft, in which a safety escape ladder is arranged at the ventilation opening of the mine, so as to achieve an emergency escape effect at the ventilation opening; however, the structure of the mine ventilation opening is completely different from that of the central pump room, and the above scheme cannot be used in the central pump room to solve the emergency escape problem of construction workers. Therefore, it is necessary to study an emergency escape structure suitable for the central pump room environment to solve the above problem. Summary of the invention

[0004] The utility model aims to solve the above problems and provide a foldable shaft emergency escape structure which is simple in structure and convenient to use.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A foldable shaft emergency escape structure comprises a folding pedal mechanism, which is arranged on the inner wall of the shaft, a platform mechanism is arranged at one end of the folding pedal mechanism, the platform mechanism is fixedly connected to the shaft side wall and the front end of the platform mechanism is communicated with a safety staircase passage arranged at the front end of the shaft side wall, a support member for supporting the folding pedal mechanism is arranged at the bottom of the other end of the folding pedal mechanism, and the support member is located on one side of the escape staircase passage; the folding pedal mechanism comprises a pedal member, a guardrail assembly, and a pulling control assembly, the pedal member is in the shape of a rectangular plate, one end of the pedal member in the width direction is connected to the shaft inner wall by a pin shaft, and the other end of the pedal member in the width direction is connected to the bottom end of the guardrail assembly by a pin shaft, and the pulling control assembly is respectively connected to the pedal member and the shaft inner wall and controls the pedal member to fold and unfold.

[0007] Furthermore, the platform mechanism includes a platform mounting plate and a platform guardrail, one side of the platform mounting plate is fixedly connected to the side wall of the wellbore, the top of the other side of the platform mounting plate is fixedly connected to the platform guardrail, and an avoidance gap is arranged between one end of the platform guardrail close to the inner wall of the wellbore and the inner wall of the wellbore; when the pedal member is in the expanded state, one end of the pedal member in the length direction is placed on the platform mounting plate within the avoidance gap and supported by the platform mounting plate.

[0008] Furthermore, the support member includes a support beam and a limiting beam. The length direction of the support beam is consistent with the width direction of the pedal member. One end of the support beam is fixedly connected to the inner wall of the wellbore, and the other end of the support beam is fixedly connected to the limiting beam. The length direction of the limiting beam is perpendicular to the ground; one end of the pedal member in the length direction is located at the upper end of the support beam and at the same time is located between the limiting beam and the inner wall of the wellbore; when the pedal member is in the expanded state, one end of the pedal member in the length direction is placed on the support beam and supported by the support beam.

[0009] Furthermore, the guardrail assembly includes a cross bar and two or more vertical bars. The length direction of the cross bar is consistent with the length direction of the pedal member, the length direction of the vertical bar is perpendicular to the length direction of the cross bar, and the vertical bars are arranged along the length direction of the pedal member; one end of the vertical bar is pin-connected to the end of the pedal member away from the inner wall of the shaft, and the middle part and / or the other end of the vertical bar are welded to the cross bar; when the pedal member is in the expanded state, the guardrail assembly is perpendicular to the pedal member, the cross bar is located in the avoidance interval, and the end of the platform guardrail close to the avoidance interval blocks the cross bar to prevent the guardrail assembly from flipping to the side away from the inner wall of the shaft.

[0010] Furthermore, a first limit plate and a second limit plate are welded to the bottom end of the vertical rod, and the first limit plate is in the shape of a longitudinally arranged semicircular plate, the length direction of the straight side of the first limit plate is consistent with the length direction of the vertical rod, and the upper part of the straight side of the first limit plate is welded to the bottom end of the outer wall of the vertical rod; the second limit plate is in the shape of a quarter-circular plate or a right-angled triangle, and one of the right-angled sides of the second limit plate is welded to the bottom end of the inner wall of the vertical rod; when the pedal member is in the unfolded state, the other right-angled side of the second limit plate abuts against the top end wall of the pedal member on the side away from the inner wall of the wellbore; when the pedal member is in the folded state, the first limit plate rotates with the guardrail assembly and makes the lower part of the straight side of the first limit plate abut against the bottom end wall of the pedal member on the side away from the inner wall of the wellbore.

[0011] Furthermore, the pulling control assembly includes a first pulling rope, a second pulling rope, a guide wheel, a blocking member, and a casing member, the guide wheel being rotatably connected to the inner wall of the wellbore, the casing member being fixedly connected to the inner wall of the wellbore and being located on the outside of the support member, one end of the first pulling rope is connected to the side of the pedal member away from the inner wall of the wellbore, and the other end of the first pulling rope is guided by the guide wheel and passes through the casing member to be connected to the first hanging member; the blocking member is located above the pedal member, and the top of the blocking member is connected to the inner wall of the wellbore through a positioning pin shaft, and the axial direction of the positioning pin is perpendicular to the inner wall of the wellbore; the bottom end of the blocking member is set to a bending structure and a blocking gap with a bottom opening is formed between the inner wall of the bottom end of the blocking member and the inner wall of the wellbore through the bending structure; when the pedal member is in a folded state, the edge of one end of the pedal member away from the inner wall of the wellbore is located in the blocking gap and is blocked and limited by the blocking member; the outer side of the bottom end of the blocking member is connected to one end of the second pulling rope, and the other end of the second pulling rope is connected to the second hanging member after passing through the casing member.

[0012] Furthermore, a torsion spring is sleeved on the outer side of the positioning pin, and both ends of the torsion spring are respectively connected to the inner wall of the wellbore and the inner wall of the top end of the positioning member; when the torsion spring is in a normal state, the bottom end of the positioning member is arranged downward.

[0013] Furthermore, an escape notch for evading the limit beam is provided on the outer side of one end of the pedal member close to the support member so as to reduce the setting length of the support beam.

[0014] Compared with the prior art, the utility model has the following advantages and positive effects:

[0015] When the utility model is in a normal state, the folding pedal mechanism is in a folded state, which will not cause any obstruction to the up and down lifting space of the cage, and the cage can be lifted up and down normally; when encountering a dangerous situation in the mine, it is only necessary to climb to the support position through the escape staircase passage, and then turn the folding pedal mechanism downward by pulling the control component, and the folding pedal mechanism is in an unfolded state, and the construction personnel can reach the safe staircase passage through the pedal member and the platform mechanism, thereby achieving the effect of the construction personnel escaping from the mine quickly and safely, effectively improving the escape efficiency of the construction personnel, and ensuring the life safety of the construction personnel;

[0016] The utility model does not cause any influence on the up and down lifting operation of the cage, can improve the escape efficiency of construction workers when encountering dangerous situations, and has excellent use effect; at the same time, it has a simple structure and low cost, can be installed and used in the existing mine structure, and has excellent market promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a top view of the connection structure of the utility model;

[0019] Figure 2 This is the front view of the connection structure of the utility model;

[0020] Figure 3 for Figure 2 AA cross-sectional structure diagram;

[0021] Figure 4 It is a structural schematic diagram of the pedal member in a folded state;

[0022] Figure 5 A diagram showing the connection structure between the pedal member and the locking member when the pedal member is in a folded state;

[0023] Figure 6 It is a schematic diagram of the structure after the locking piece is rotated open. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the utility model.

[0025] like Figures 1 to 6 As shown, this embodiment discloses a foldable shaft emergency escape structure, including a folding pedal mechanism, the folding pedal mechanism is arranged on the shaft inner wall 1 in the tank cage upper and lower lifting space 15, one end of the folding pedal mechanism is provided with a platform mechanism, the platform mechanism is located on one side of the tank cage upper and lower lifting space 15, the platform mechanism is fixedly connected to the shaft side wall 2 and the front end of the platform mechanism is connected to the safety staircase passage 13 arranged at the front end of the shaft side wall, the other end of the folding pedal mechanism is provided with a support member 7 for supporting the folding pedal mechanism at the bottom, the support member 7 is located on the other side of the tank cage upper and lower lifting space 15, and an escape staircase passage 14 is arranged outside the support member 7;

[0026] The platform mechanism includes a platform mounting plate 5 and a platform guardrail 6. One side of the platform mounting plate 5 is fixedly connected to the shaft side wall 2, and the top of the other side of the platform mounting plate 5 is fixedly connected to the platform guardrail 6. An avoidance gap 601 is provided between one end of the platform guardrail 6 close to the shaft inner wall 1 and the shaft inner wall 1; when the pedal member 3 is in the unfolded state, one end of the pedal member 3 in the length direction is placed on the platform mounting plate 5 within the avoidance gap 601 and supported by the platform mounting plate 5.

[0027] After the construction workers pass through the up and down lifting space of the cage through the folding pedal mechanism, they can step on the platform mounting plate to reach the safe staircase passage, and the platform guardrail plays a walking protection role; at the same time, the platform mounting plate can support the pedal parts in the unfolded state to ensure the placement stability of the pedal parts; and the platform guardrail will limit the guardrail assembly in the unfolded state, so that when the folding pedal mechanism is in the unfolded state, the guardrail assembly can be in a vertical state to protect the construction workers walking on the pedal parts.

[0028] The support member 7 includes a support beam 701 and a limiting beam 702. The length direction of the support beam 701 is consistent with the width direction of the pedal member 3. One end of the support beam 701 is fixedly connected to the inner wall 1 of the wellbore, and the other end of the support beam 701 is fixedly connected to the limiting beam 702. The length direction of the limiting beam 702 is perpendicular to the ground; one end of the pedal member 3 in the length direction is located at the upper end of the support beam 701 and at the same time is located between the limiting beam 702 and the inner wall 1 of the wellbore; when the pedal member 3 is in the unfolded state, one end of the pedal member 3 in the length direction is placed on the support beam 701 and supported by the support beam 701.

[0029] The support member is arranged on the inner wall of the shaft on one side of the upper and lower lifting space of the cage. It is a steel beam structure, which realizes the supporting function for the end of one end of the support member.

[0030] The folding pedal mechanism includes a pedal member 3, a guardrail assembly 4, and a pulling control assembly. The pedal member 3 is in the shape of a rectangular plate. One end of the pedal member 3 in the width direction is pin-connected to the inner wall 1 of the shaft, and the other end of the pedal member 3 in the width direction is pin-connected to the bottom end of the guardrail assembly 4. The pulling control assembly is respectively connected to the pedal member 3 and the inner wall 1 of the shaft and controls the pedal member 3 to fold and unfold.

[0031] The guardrail assembly 4 includes two transversely parallel cross bars 42 and two longitudinally parallel vertical bars 41. The length direction of the cross bar 42 is consistent with the length direction of the pedal member 3, and the length direction of the vertical bar 41 is perpendicular to the length direction of the cross bar 42. The vertical bars 41 are arranged along the length direction of the pedal member 3; one end of the vertical bar 41 is pin-connected to the end of the pedal member 3 away from the inner wall 1 of the shaft, and the middle part of the vertical bar 41 and the other end of the vertical bar 41 are welded to the two cross bars 42 respectively; when the pedal member 3 is in the expanded state, the guardrail assembly 4 is perpendicular to the pedal member 3, and the cross bar 42 is located in the avoidance interval 601. The end of the platform guardrail 6 close to the avoidance interval 601 blocks the cross bar 42 to prevent the guardrail assembly 4 from flipping to the side away from the inner wall 1 of the shaft.

[0032] A first limiting plate 411 and a second limiting plate 412 are welded to the bottom end of the vertical rod 41. The first limiting plate 411 is in the shape of a longitudinally arranged semicircular plate. The length direction of the straight side of the first limiting plate 411 is consistent with the length direction of the vertical rod 41, and the upper part of the straight side of the first limiting plate 411 is welded to the bottom end of the outer wall of the vertical rod 41; the second limiting plate 412 is in the shape of a quarter-circular plate, and one of the right-angled sides of the second limiting plate 412 is welded to the bottom end of the inner wall of the vertical rod 41; when the pedal member 3 is in the unfolded state, the other right-angled side of the second limiting plate 412 abuts against the top end wall of the side of the pedal member 3 away from the inner wall 1 of the wellbore; when the pedal member 3 is in the folded state, the first limiting plate 411 rotates with the guardrail assembly 4 and makes the lower part of the straight side of the first limiting plate 411 abut against the bottom end wall of the side of the pedal member 3 away from the inner wall 1 of the wellbore.

[0033] The pulling control assembly includes a first pulling rope 11, a second pulling rope 12, a guide wheel 9, a positioning member 8, and a casing member 10. The guide wheel 9 is rotatably connected to the inner wall 1 of the wellbore. The casing member 10 is fixedly connected to the inner wall 1 of the wellbore and is located outside the support member 7. One end of the first pulling rope 11 is connected to the side of the pedal member 3 away from the inner wall 1 of the wellbore. The other end of the first pulling rope 11 is guided by the guide wheel 9 and passes through the casing member 10 to be connected to the first hanging member; the positioning member 8 is located above the pedal member 3, and the top of the positioning member 8 is connected by a positioning pin 801. The pin shaft is connected to the inner wall 1 of the wellbore, and the axial direction of the positioning pin 801 is perpendicular to the inner wall 1 of the wellbore; the bottom end of the locking member 8 is set to a bending structure, and a blocking gap 802 with a bottom opening is formed between the inner wall of the bottom end of the locking member 8 and the inner wall 1 of the wellbore through the bending structure; when the pedal member 3 is in a folded state, the edge of one end of the pedal member 3 away from the inner wall 1 of the wellbore is located in the blocking gap 802 and is blocked and limited by the locking member 8; the outer side of the bottom end of the locking member 8 is connected to one end of the second pulling rope 12, and the other end of the second pulling rope 12 is connected to the second hanging member after passing through the casing member 10.

[0034] The outer side of the positioning pin 801 is sleeved with a torsion spring 803, and the two ends of the torsion spring 803 are respectively connected to the inner wall 1 of the wellbore and the inner wall at the top of the retaining member 8; when the torsion spring 803 is in a normal state, the bottom end of the retaining member 8 is arranged to face downward.

[0035] When the pedal member is in the unfolded state, the two ends of the pedal member in the length direction are placed on the platform mounting plate and the support beam respectively; the outer side of the guardrail assembly is blocked by the platform guardrail and will not flip outward, and the inner side of the guardrail assembly is blocked by the second limit plate and will not flip inward, thereby maintaining a vertical state; the first pulling rope and the second pulling rope are both in a relaxed state, such as Figure 1 , Figure 2 , Figure 3 shown.

[0036] When it is necessary to transform the pedal member from the expanded state to the folded state, the first pulling rope is pulled to cause the pedal member to flip upward, and at the same time the guardrail assembly flips upward in the opposite direction. When the first limit plate abuts against the end face of the pedal member, the pedal member and the guardrail assembly are both arranged in a vertical state close to the inner wall of the shaft. During the upward flipping of the pedal member, the clamping member is rotated by pulling the second pulling rope so that the bottom end of the clamping member does not hinder the rotational abutment action of the pedal member. When the pedal member abuts against the inner wall of the shaft, the second pulling rope is released, so that the clamping member rotates in the opposite direction under the action of the torsion spring and returns to its original position, and finally the top end of the pedal member is clamped into the blocking interval formed between the bottom end of the clamping member and the inner wall of the shaft. The pedal member and the guardrail assembly are in a folded state under the blocking action of the clamping member. Figure 4 , Figure 5 shown.

[0037] When it is necessary to change the pedal member from the folded state to the unfolded state, it is only necessary to pull the second pulling rope again to rotate the positioning member and no longer hinder the top of the pedal member. At this time, the pre-tightening force between the pedal member and the inner wall of the wellbore or the manual thrust of the construction workers and the gravity of the pedal member can be used to make the pedal member and the guardrail assembly rotate downward quickly (such as Figure 6 As shown in the figure), the first pulling rope is loosened as the pedal member rotates, and finally, the pedal member and the guardrail assembly are in an unfolded state.

[0038] In the shaft environment of the present mine, the safety staircase passage is large in volume and has the highest degree of safety, while the escape staircase passage is an emergency backup passage and is relatively small in volume. Therefore, in order to improve the escape efficiency of construction workers when the mine encounters a dangerous situation, it is usually necessary to let the construction workers run from the escape staircase passage to the safety staircase passage. Therefore, the control ends of the first pulling rope and the second pulling rope are both set in the direction of the escape staircase passage; if the construction workers are also considered to run from the safety staircase passage to the escape staircase passage, a first pulling rope, a second pulling rope, and a sleeve member structure can be set above the platform mounting plate, which can also control the unfolding and folding states of the pedal member.

[0039] The outer side of the pedal member 3 near the support member 7 is provided with an avoidance notch 301 for avoiding the limit beam 702 to reduce the setting length of the support beam 701. This design can reduce the length of the support beam and avoid the influence of the excessive length of the support beam on the up and down lifting action of the cage.

[0040] When the utility model is in a normal state, the folding pedal mechanism is in a folded state, which will not cause any obstruction to the up and down lifting space of the cage, and the cage can be lifted up and down normally; when encountering a dangerous situation in the mine, it is only necessary to climb to the support position through the escape staircase passage, and then turn the folding pedal mechanism downward by pulling the control component, and the folding pedal mechanism is in an unfolded state, and the construction personnel can reach the safe staircase passage through the pedal member and the platform mechanism, thereby achieving the effect of the construction personnel escaping from the mine quickly and safely, effectively improving the escape efficiency of the construction personnel, and ensuring the life safety of the construction personnel;

[0041] The utility model does not cause any influence on the up and down lifting operation of the cage, can improve the escape efficiency of construction workers when encountering dangerous situations, and has excellent use effect; at the same time, it has a simple structure and low cost, can be installed and used in the existing mine structure, and has excellent market promotion value.

Claims

1. A foldable shaft emergency escape structure, comprising a folding pedal mechanism, characterized in that: The folding pedal mechanism is arranged on the inner wall of the shaft, and a platform mechanism is arranged at one end of the folding pedal mechanism. The platform mechanism is fixedly connected to the side wall of the shaft and the front end of the platform mechanism is connected to the safety staircase passage arranged at the front end of the side wall of the shaft. A support member for supporting the folding pedal mechanism is arranged at the bottom of the other end of the folding pedal mechanism, and the support member is located on one side of the escape staircase passage; the folding pedal mechanism includes a pedal member, a guardrail assembly, and a pulling control assembly. The pedal member is in the shape of a rectangular plate, and one end of the pedal member in the width direction is connected to the inner wall of the shaft by a pin shaft, and the other end of the pedal member in the width direction is connected to the bottom end of the guardrail assembly by a pin shaft. The pulling control assembly is respectively connected to the pedal member and the inner wall of the shaft and controls the pedal member to fold and unfold.

2. The foldable shaft emergency escape structure according to claim 1, characterized in that: The platform mechanism includes a platform mounting plate and a platform guardrail. One side of the platform mounting plate is fixedly connected to the side wall of the wellbore, and the top of the other side of the platform mounting plate is fixedly connected to the platform guardrail. An avoidance gap is set between the end of the platform guardrail close to the inner wall of the wellbore and the inner wall of the wellbore. When the pedal member is in the unfolded state, one end of the pedal member in the length direction is placed on the platform mounting plate within the avoidance gap and supported by the platform mounting plate.

3. The foldable shaft emergency escape structure according to claim 2, characterized in that: The support member includes a support beam and a limiting beam. The length direction of the support beam is consistent with the width direction of the pedal member. One end of the support beam is fixedly connected to the inner wall of the wellbore, and the other end of the support beam is fixedly connected to the limiting beam. The length direction of the limiting beam is perpendicular to the ground; one end of the pedal member in the length direction is located at the upper end of the support beam and at the same time is located between the limiting beam and the inner wall of the wellbore; when the pedal member is in the expanded state, one end of the pedal member in the length direction is placed on the support beam and supported by the support beam.

4. The foldable shaft emergency escape structure according to claim 3, characterized in that: The guardrail assembly includes a cross bar and two or more vertical bars. The length direction of the cross bar is consistent with the length direction of the pedal member, the length direction of the vertical bar is perpendicular to the length direction of the cross bar, and the vertical bars are arranged along the length direction of the pedal member; one end of the vertical bar is pin-connected to the end of the pedal member away from the inner wall of the shaft, and the middle part of the vertical bar and / or the other end of the vertical bar are welded to the cross bar; when the pedal member is in the expanded state, the guardrail assembly is perpendicular to the pedal member, the cross bar is located in the avoidance interval, and the end of the platform guardrail close to the avoidance interval blocks the cross bar to prevent the guardrail assembly from flipping to the side away from the inner wall of the shaft.

5. The foldable shaft emergency escape structure according to claim 4, characterized in that: A first limit plate and a second limit plate are welded to the bottom end of the vertical rod, and the first limit plate is in the shape of a longitudinally arranged semicircular plate, the length direction of the straight side of the first limit plate is consistent with the length direction of the vertical rod, and the upper part of the straight side of the first limit plate is welded to the bottom end of the outer wall of the vertical rod; the second limit plate is in the shape of a quarter-circular plate or a right-angled triangle, and one of the right-angled sides of the second limit plate is welded to the bottom end of the inner wall of the vertical rod; when the pedal member is in the unfolded state, the other right-angled side of the second limit plate abuts against the top end wall of the pedal member on the side away from the inner wall of the wellbore; when the pedal member is in the folded state, the first limit plate rotates with the guardrail assembly and makes the lower part of the straight side of the first limit plate abut against the bottom end wall of the pedal member on the side away from the inner wall of the wellbore.

6. The foldable shaft emergency escape structure according to claim 5, characterized in that: The pulling control assembly includes a first pulling rope, a second pulling rope, a guide wheel, a clamping piece, and a casing piece, wherein the guide wheel is rotatably connected to the inner wall of the wellbore, the casing piece is fixedly connected to the inner wall of the wellbore and is located on the outside of the support piece, one end of the first pulling rope is connected to the side of the pedal piece away from the inner wall of the wellbore, and the other end of the first pulling rope is guided by the guide wheel and passes through the casing piece to be connected to the first hanging piece; the clamping piece is located above the pedal piece, and the top of the clamping piece is connected to the inner wall of the wellbore through a positioning pin shaft, and the axial direction of the positioning pin is perpendicular to the inner wall of the wellbore; the bottom end of the clamping piece is arranged to be a bending structure, and a blocking gap with a bottom opening is formed between the inner wall of the bottom end of the clamping piece and the inner wall of the wellbore through the bending structure; when the pedal piece is in a folded state, the edge of one end of the pedal piece away from the inner wall of the wellbore is located in the blocking gap and is blocked and limited by the clamping piece; the outer side of the bottom end of the clamping piece is connected to one end of the second pulling rope, and the other end of the second pulling rope is connected to the second hanging piece after passing through the casing piece.

7. The foldable shaft emergency escape structure according to claim 6, characterized in that: A torsion spring is sleeved on the outer side of the positioning pin, and the two ends of the torsion spring are respectively connected to the inner wall of the wellbore and the inner wall of the top end of the positioning member; when the torsion spring is in a normal state, the bottom end of the positioning member is arranged downward.

8. The foldable shaft emergency escape structure according to claim 7, characterized in that: An escape notch for escaping the limit beam is arranged on the outer side of one end of the pedal member close to the support member, so as to reduce the setting length of the support beam.

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