Trestle corridor posture adjusting device and trestle

Abstract

The utility model relates to a trestle corridor posture adjusting device and a trestle. The trestle corridor posture adjusting device comprises a detecting mechanism, a driving mechanism, an executing mechanism and a feedback mechanism. After the detection mechanism forms a control signal, the driving mechanism moves the control assembly to a second position according to the control signal and controls the power assembly to output driving force, and the feedback mechanism is connected with the execution mechanism and the driving mechanism. The driving force is transmitted to the control assembly on the driving mechanism through the feedback mechanism, then the control assembly returns to the first position from the second position, the power assembly stops outputting the driving force, and due to the fact that the feedback mechanism conducts mechanical feedback on the driving force, the driving force can be transmitted to the control assembly on the driving mechanism through the feedback mechanism. The execution mechanism stops after driving the trestle corridor to a certain stroke, and the stroke is only related to the control signal, so that interference factors in control are reduced, the attitude of the trestle corridor is accurately controlled, and a complex and time-consuming parameter adjustment process in hydraulic servo is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of water operation equipment, in particular to a pier corridor posture regulating device and a pier. Background Art

[0002] With the promotion and application of marine technology, engineering and technical personnel need to frequently go up and down offshore structures, platforms or facilities. Safety and speed are the primary considerations for personnel transportation.

[0003] A pier equipment is required when personnel are transported on and off the maintenance ship. However, due to the changing position of the ship in the wind and waves, the posture of the pier corridor installed on the maintenance ship also sways with the wind and waves, affecting the passage of personnel.

[0004] In the related technology, in order to constrain the distance between the end of the pier corridor and the offshore structure to an acceptable safety gap, the control system will detect the posture of the operation and maintenance ship in the ocean waves, decouple it into the real-time position requirements of the pier's boom length adjustment, rotation, and telescopic mechanisms through an algorithm, and control the pier in real time through hydraulic servo valves.

[0005] However, since hydraulic servo valves are precision hydraulic control components, they have high requirements for the cleanliness of hydraulic media. In addition, the shape of the valve port is nonlinear, and the hydraulic oil flow is affected by factors such as the valve port opening, oil temperature, and the pressure difference between the upstream and downstream of the valve port. This makes it difficult to debug the control parameters of the on-site servo and takes a long time to debug.

[0006] Therefore, it is necessary to develop a novel trestle corridor regulating device and trestle to improve the above-mentioned part of the problems existing in the relevant technology. Utility Model Content

[0007] The utility model aims to provide a trestle corridor posture adjustment device and a trestle, which can realize accurate control of the trestle corridor posture under the premise of lower medium cleaning requirements and hydraulic system debugging difficulty.

[0008] The purpose of the utility model can be achieved through the following technical solutions:

[0009] The utility model provides a pier corridor posture adjustment device, comprising: a detection mechanism, a driving mechanism, an actuator and a feedback mechanism; the detection mechanism is used to form a control signal according to the ocean wave posture; the driving mechanism is electrically connected to the detection mechanism, and the driving mechanism comprises a power component and a control component; the control component moves on a control path according to the control signal, and when the control component moves from a first position to a second position, the power component outputs a driving force; the actuator is connected to the driving mechanism, and is used to move under the action of the driving force to adjust the posture of the pier corridor arranged on the actuator; the feedback mechanism is connected to the actuator and the driving mechanism, and is used to move the control component from the second position to the first position under the action of the driving force, and the power component stops outputting the driving force.

[0010] Compared with the prior art, the utility model provides a trestle corridor posture adjustment device. After the detection mechanism forms a control signal, the driving mechanism controls the power component to output the driving force by moving the control component to the second position according to the control signal. The actuator moves and adjusts the posture of the trestle corridor under the action of the driving force. The feedback mechanism connects the actuator and the driving mechanism. When the actuator moves under the action of the driving force, the driving force will be transmitted to the control component on the driving mechanism by the feedback mechanism, thereby causing the control component to return from the second position to the first position, and the power component stops outputting the driving force. Since the feedback mechanism mechanically feeds back the driving force, the actuator stops after driving the trestle corridor for a certain stroke, and its stroke is only related to the control signal, which reduces interference factors in the control, realizes precise control of the trestle corridor posture, avoids the complex and time-consuming parameter adjustment process in the hydraulic servo, and has low requirements for medium cleaning.

[0011] Optionally, the control component includes: a control valve and a medium circuit controlled by the control valve, the actuator is driven by the medium pressure provided by the power component, and the feedback mechanism is connected to the control valve.

[0012] Optionally, the control valve is a three-position four-way reversing valve, and the feedback mechanism is connected to the valve core of the control valve, and is used to transmit the driving force to the valve core, so that the valve core moves from the second position to the first position, and the first position is the center position of the valve core. By reversing the hydraulic pressure through the three-position four-way reversing valve, the posture of the trestle corridor can be accurately adjusted in both positive and negative directions.

[0013] Optionally, the control component includes: a valve core moving motor and a first valve core moving component connected to each other; the valve core moving motor outputs a force to the first valve core moving component according to the control signal, and drives the valve core to move from the first position to the second position through the first valve core moving component.

[0014] Optionally, the actuator includes a piston member and a support member, wherein the support member is respectively connected to the piston member and the trestle corridor, and the end of the trestle corridor is driven to rise and fall through the support member during the movement of the piston member.

[0015] Optionally, the feedback mechanism includes: a screw nut pair, a gear pair and a second valve core moving assembly; the screw nut pair is respectively connected to the piston member and the gear pair, and is used to convert the linear motion of the piston member into the rotational motion of the gear pair, and the second valve core moving assembly relies on the rotational motion to drive the valve core to move from the second position to the first position.

[0016] Optionally, the actuator includes a rotating shaft and a rotating member, wherein the rotating member is connected to the rotating shaft and the trestle corridor respectively, and the trestle corridor is driven to rotate by the rotating member during the rotation of the rotating shaft.

[0017] Optionally, the feedback mechanism includes: a gear pair and a second valve core moving assembly; the gear pair is respectively connected to the rotating shaft member and the second valve core moving assembly, the gear pair is used to transmit the rotational motion of the rotating shaft member, and the second valve core moving assembly relies on the rotational motion to drive the valve core to move from the second position to the first position.

[0018] Optionally, the actuator includes a gear member and a gear condition, wherein the gear condition is respectively connected to the gear member and the trestle corridor, and the trestle corridor is driven to extend and retract via the gear condition during rotation of the gear member.

[0019] The utility model also provides a trestle, including a trestle corridor and the above-mentioned trestle corridor posture adjustment device, the driving force is mechanically fed back through a feedback mechanism, the actuator drives the trestle corridor to stop after a certain stroke, and its stroke is only related to the control signal, thereby reducing interference factors in the control, realizing precise control of the trestle corridor posture, avoiding the complex and time-consuming parameter adjustment process in the hydraulic servo, and at the same time having low requirements for medium cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the trestle corridor posture adjustment device in the first embodiment of the utility model;

[0021] Figure 2It is a structural schematic diagram of the trestle corridor posture adjustment device in the second embodiment of the utility model;

[0022] Figure 3 for Figure 1 Schematic diagram of the assembly structure of the control valve shown.

[0023] Reference numerals:

[0024] 1. Driving mechanism; 11. Power assembly; 12. Control assembly; 121. Control valve; 122. Valve core moving motor; 21. Hydraulic motor; 22. Transmission shaft; 201. Piston member; 202. Cylinder; 211. Rotating shaft member; 212. First gear; 213. Second gear; 3. Feedback mechanism; 301. Screw; 302. Nut; 303. Third gear; 304. Gear group output member; 4. Valve core; 401. First connecting part; 402. Second connecting part; 501. First valve core connecting member 501; 502. Second valve core connecting member. DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0026] The utility model embodiment provides a trestle corridor posture adjustment device, referring to Figure 1 and Figure 2 The pier corridor posture adjustment device includes: a detection mechanism, a driving mechanism 1, an actuator and a feedback mechanism 3; the detection mechanism is used to form a control signal according to the ocean wave posture; the driving mechanism 1 is electrically connected to the detection mechanism, and the driving mechanism 1 includes a power component 11 and a control component 12; the control component 12 moves on the control path according to the control signal, and when the control component 12 moves from the first position to the second position, the power component 11 outputs the driving force; the actuator is connected to the driving mechanism 1, and is used to move under the action of the driving force to adjust the posture of the pier corridor set on the actuator; the feedback mechanism 3 is connected to the actuator and the driving mechanism 1, and is used to move the control component 12 from the second position to the first position under the action of the driving force, and the power component 11 stops outputting the driving force.

[0027] In some specific embodiments of the utility model, the detection mechanism can form the control signal by detecting the ocean wave posture, specifically the shape of the wave, such as the crest, trough, wave height, wavelength, wave steepness, wave speed or wave period.

[0028] In some specific embodiments of the present invention, the detection mechanism can indirectly obtain the ocean wave posture and form the control signal by detecting the swinging posture of the operation and maintenance ship with the waves.

[0029] In some specific embodiments of the present invention, the control signal is an electrical pulse signal.

[0030] In some specific embodiments of the utility model, the detection mechanism can obtain the control signal by means of machine vision. For example, the ocean wave posture is converted into an image signal by an image capture device and processed into the control signal. The specific method can be achieved by existing technologies known to those skilled in the art, and the utility model will not be repeated here.

[0031] In some specific embodiments of the utility model, the detection mechanism can obtain the control signal by mechanical means, illustratively, by recording the motion trajectory of the float floating with the ocean waves and processing it into the control signal. The specific method can be achieved by existing technologies known to those skilled in the art, and the utility model will not be elaborated here.

[0032] In some specific embodiments of the present invention, refer to Figure 1 and Figure 2 The power component 11 includes a hydraulic source for providing medium pressure, and the control component 12 includes a movable control component and a plurality of hydraulic pipelines. The moving path of the control component is the control path, and the on-off control of the plurality of hydraulic pipelines is achieved by moving the position on the control path. When the control component moves to the second position, the power component transmits a driving force to the actuator by outputting hydraulic oil to the hydraulic pipeline through the hydraulic source, and the actuator drives the trestle corridor to move during the movement, thereby adjusting the posture of the trestle corridor; when the control component moves to the first position, the hydraulic source stops outputting hydraulic oil to the hydraulic pipeline, the actuator stops moving, and the posture of the trestle corridor no longer changes.

[0033] In some specific embodiments, the hydraulic source outputs high-pressure power oil.

[0034] In some specific embodiments of the present invention, refer to Figure 1 and Figure 2 The feedback mechanism 3 can be connected to the control component of the control assembly 12, and the position of the control component can be moved by mechanically transmitting the driving force.

[0035] In some embodiments of the present invention, reference Figure 1 and Figure 2The control component 12 includes: a control valve 121 and a medium circuit controlled by the control valve 121 . The actuator is driven by the medium pressure provided by the power component 11 . The feedback mechanism 3 is connected to the control valve 121 .

[0036] In some specific embodiments, referring to Figure 1 and Figure 2 , the medium is hydraulic oil, the medium circuit is a hydraulic circuit, the control component is the valve core of the control valve 121, the control path is the valve core movement path of the control valve 121, and the valve core has working positions of the first position and the second position.

[0037] In some specific embodiments, the valve core is a shaft-like part that can rotate along its axis, and the control path is a path for the valve core to move in the axial direction.

[0038] In some specific embodiments, referring to Figure 1 and Figure 2 The feedback mechanism 3 is connected to the valve core, thereby causing the valve core to move between the first position and the second position.

[0039] In some embodiments of the present invention, reference Figure 1 and Figure 2 The control valve 121 is a three-position four-way reversing valve. The feedback mechanism 3 is connected to the valve core of the control valve 121 and is used to transmit the driving force to the valve core so that the valve core moves from the second position to the first position, and the first position is the center position of the valve core.

[0040] In some specific embodiments, referring to Figure 1 and Figure 2 The control valve 121 is a three-position four-way reversing valve, and the valve core of the control valve 121 has a center position and two working positions.

[0041] In some specific embodiments, the center position is the first position, and when the valve core is located at the first position, the power assembly 11 stops outputting driving force.

[0042] In some specific embodiments, when the valve core is located at the middle position, the control valve 121 prevents the hydraulic oil source from outputting hydraulic oil.

[0043] In some specific embodiments, the two working positions correspond to two second positions where the medium flows in different directions, respectively.

[0044] For example, refer to Figure 1, the second position includes a first flow direction second position and a second flow direction working position; when the valve core is located at the first flow direction second position, the power component 11 outputs the driving force to cause the actuator to move in the first direction, that is, the piston moves in the direction A shown in the figure; when the valve core is located at the second flow direction second position, the power component 11 outputs the driving force to cause the actuator to move in the second direction, that is, the piston moves in the opposite direction of the direction A shown in the figure.

[0045] In some embodiments of the present invention, reference Figure 1 and Figure 2 The control component 12 includes: a valve core moving motor 122 and a first valve core moving component that are connected to each other; the valve core moving motor 122 outputs a force to the first valve core moving component according to the control signal, and drives the valve core to move from the first position to the second position through the first valve core moving component.

[0046] In some specific embodiments, the valve core moving motor 122 rotates a certain angle according to the control signal, and the first valve core moving component converts the rotational motion output by the valve core moving motor 122 into the linear motion of the valve core.

[0047] In some specific embodiments, referring to Figure 3 , the control valve also includes a first fixed valve core mounting member (not shown in the figure), the valve core 4 is arranged on the first valve core mounting member and is threadedly connected to the first valve core mounting member; the first valve core moving assembly includes a first valve core connecting member 501, and the two ends of the first valve core connecting member 501 are respectively connected to the output shaft of the valve core moving motor 122 and the valve core 4; wherein, the first valve core connecting member 501 is fixedly connected to the valve core moving motor 122 to transmit torque; the first valve core connecting member 501 is circumferentially fixedly connected to the end of the valve core 4 and axially slidably connected, so that when the valve core moving motor 122 drives the valve core 4 to rotate through the first valve core connecting member 501, the valve core 4 and the first valve core mounting member are spirally transmitted to realize the movement of the valve core 4 from the first position to the second position along its axial direction.

[0048] In some specific embodiments, the first valve core mounting member includes an internal thread structure, the valve core includes a matching external thread structure, and the first valve core mounting member is fixedly disposed in both the axial direction and the axial direction of the valve core.

[0049] In some specific embodiments, the first valve core connector 501 may be an axially slidable coupling.

[0050] In some specific embodiments, the first valve core connector 501 and the end of the valve core 4 can be connected by a spline, a sliding key, a guide flat key, etc.

[0051] In some specific embodiments, the valve core moving motor 122 is a stepping motor.

[0052] In some embodiments of the present invention, reference Figure 1 The actuator includes a piston member 201 and a support member, wherein the support member is respectively connected to the piston member 201 and the trestle corridor, and the end of the trestle corridor is driven to rise and fall through the support member during the movement of the piston member 201.

[0053] In some specific embodiments, referring to Figure 1 The driving mechanism 1 can be provided with a cylinder 202 on the piston member 201, and the power assembly 11 can provide liquid pressure to the cylinder 202 to make the piston member 201 extend and retract. The specific implementation method is the existing technology known to those skilled in the art, so it will not be repeated here.

[0054] In some specific embodiments, the corridor end on one side of the trestle corridor can be rotatably set on the deck of the maintenance ship, the cylinder 202 is set on the deck, and the piston member 201 is connected to the trestle corridor at a position with a certain distance from the corridor end through the support member. When the piston rod moves telescopically, the trestle corridor swings with the corridor end on the deck as the center, and the other side end of the trestle corridor produces a rising and falling movement relative to the deck.

[0055] In some embodiments of the present invention, reference Figure 1 The feedback mechanism 3 includes: a screw nut pair, a gear pair and a second valve core moving assembly 24; the screw nut pair is respectively connected to the piston member 201 and the gear pair, and is used to convert the linear motion of the piston member 201 into the rotational motion of the gear pair, and the second valve core moving assembly drives the valve core from the second position to the first position by relying on the rotational motion.

[0056] In some specific embodiments, the feedback mechanism 3 includes a screw 301 connected to the piston member 201, a nut 302 connected to the screw 301, a transmission shaft 22 connected to the nut 302, a gear set arranged on the transmission shaft 22, and the second valve core moving assembly connected to the gear set output member 304.

[0057] In some specific embodiments, the gear set includes bevel gears.

[0058] In some specific embodiments, the piston member 201 linearly extends and retracts a certain distance, and the second valve core moving assembly converts the linear motion of the piston member 201 into the linear motion of the valve core.

[0059] In some specific embodiments, referring to Figure 3 , the control valve also includes a second valve core mounting member (not shown in the figure) fixedly arranged in the axial direction, the valve core 4 is arranged on the second valve core mounting member, and can slide along the axial direction of the valve core 4; the second valve core moving assembly includes a second valve core connecting member 502, and the two ends of the second valve core connecting member 502 are respectively connected to the lead screw 301 and the valve core 4; wherein, the second valve core connecting member 502 is fixedly connected to the lead screw 301 to transmit torque; the second valve core connecting member 502 is threadedly connected to the end of the valve core 4, so that when the lead screw 301 drives the second valve core connecting member 502 to rotate, the valve core 4 and the second valve core connecting member 502 are spirally transmitted to realize the movement of the valve core 4 from the second position to the first position along its axial direction.

[0060] In some specific embodiments, the second valve core installation component includes a channel extending along the axial direction of the valve core, and the valve core 4 can be slidably disposed in the channel of the second valve core installation component.

[0061] In some specific embodiments, the second valve core connector 502 includes an internal thread structure, and the valve core includes a matching external thread structure.

[0062] In some specific embodiments, the valve core 4 includes a first connecting portion 401 and a second connecting portion 402, the first connecting portion 401 is located at one end of the valve core 4 close to the valve core moving motor 122, and the second connecting portion 402 is located at one end of the valve core 4 close to the lead screw 301; the first connecting portion 401 and the first valve core connecting member 501 are circumferentially fixed and axially slidably connected, the second connecting portion 402 and the second valve core connecting member 502 are threadedly connected, the second valve core connecting member 502 is axially fixed, the first valve core connecting member 501 is fixedly connected to the valve core moving motor 122, and the second valve core connecting member 502 is fixedly connected to the lead screw 301, so as to respectively transmit the torque from the valve core moving motor 122 and the lead screw 301 to the valve core 4, so that the valve core 4 moves along its axial direction from the first position to the second position, and then moves from the second position to the first position.

[0063] In some specific embodiments, the second connection portion 402 is provided with an external thread structure, and the second valve core connector 502 includes a matching internal thread.

[0064] In some embodiments of the present invention, reference Figure 2 The actuator includes a rotating shaft 211 and a rotating member, wherein the rotating member is respectively connected to the rotating shaft 211 and the trestle corridor, and the rotating member drives the trestle corridor to rotate during the rotation of the rotating shaft 211.

[0065] In some specific embodiments, referring to Figure 2 The driving mechanism 1 may include a hydraulic motor 21, and the hydraulic motor 21 delivers hydraulic oil to rotate the rotating shaft 211. The specific implementation method is the existing technology known to those skilled in the art, so it will not be repeated here.

[0066] In some specific embodiments, the corridor end on one side of the trestle corridor is arranged on the rotating member, and the rotating member is connected to the rotating shaft member 211 through a coupling. When the rotating shaft member 211 rotates, the trestle corridor rotates with the rotating member, generating a rotational motion relative to the rotation center of the rotating member.

[0067] In some embodiments of the present invention, reference Figure 2 The feedback mechanism 3 includes: a gear pair and a second valve core moving component 24; the gear pair is connected to the rotating shaft 211 and the second valve core moving component 24 respectively, the gear pair is used to transmit the rotational motion of the rotating shaft 211, and the second valve core moving component drives the valve core to move from the second position to the first position by relying on the rotational motion.

[0068] In some specific embodiments, referring to Figure 2 The feedback mechanism 3 includes a gear set meshing with the gear connected to the rotating shaft 211 , and the second valve core moving component is connected to the gear set output component 304 .

[0069] In some specific embodiments, referring to Figure 2 The components that cooperate with each other on the actuator, the drive mechanism 1 and the feedback mechanism 3 may include a transmission shaft 22 connected to the hydraulic motor 21, a first gear 212 arranged on the transmission shaft 22, a second gear 213 meshing with the first gear 212, the rotating shaft 211 arranged on the second gear 213, a third gear 303 meshing with the second gear 213, a gear set meshing with the third gear 303, and the second valve core moving component connected to the gear set output member 304.

[0070] In some embodiments of the utility model, the actuator includes a gear member and a gear condition, wherein the gear condition is respectively connected to the gear member and the trestle corridor, and the trestle corridor is driven to extend and retract through the gear condition during the rotation of the gear member.

[0071] In some specific embodiments, the driving mechanism may include a hydraulic motor, and the hydraulic motor delivers hydraulic oil to rotate the gear member. The specific implementation method is the existing technology known to those skilled in the art, so it will not be described here.

[0072] In some specific embodiments, the pier corridor includes a first corridor section and a second corridor section, and the first corridor section and the second corridor section are connected by the meshing gear member and the gear condition, and are in a nested layout. When the gear member rotates, the gear condition drives the second corridor section to slide relative to the first corridor section, thereby realizing the extension and retraction of the pier corridor.

[0073] The embodiment of the utility model also provides a trestle, which includes a trestle corridor and the above-mentioned trestle corridor posture adjustment device. The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the utility model on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A trestle corridor posture adjustment device, characterized in that: include: A detection mechanism for forming a control signal according to the ocean wave posture; A driving mechanism (1) electrically connected to the detection mechanism, wherein the driving mechanism (1) comprises a power component (11) and a control component (12); The control component (12) moves on a control path according to the control signal, and when the control component (12) moves from a first position to a second position, the power component (11) outputs a driving force; An actuator, connected to the driving mechanism (1), and used to move under the action of the driving force to adjust the posture of the trestle corridor arranged on the actuator; A feedback mechanism (3) is connected to the actuator and the drive mechanism (1) and is used to move the control component (12) from the second position to the first position under the action of the drive force, and the power component (11) stops outputting the drive force.

2. The posture adjustment device according to claim 1, characterized in that: The control component (12) comprises: a control valve (121) and a medium circuit controlled by the control valve (121); the actuator is driven by the medium pressure provided by the power component (11); and the feedback mechanism (3) is connected to the control valve (121).

3. The posture adjustment device according to claim 2, characterized in that: The control valve (121) is a three-position four-way reversing valve. The feedback mechanism (3) is connected to the valve core of the control valve (121) and is used to transmit the driving force to the valve core so that the valve core moves from the second position to the first position, and the first position is the center position of the valve core.

4. The posture adjustment device according to claim 3, characterized in that: The control component (12) comprises: a valve core moving motor (122) and a first valve core moving component which are connected to each other; the valve core moving motor (122) outputs a force to the first valve core moving component according to the control signal, and drives the valve core to move from the first position to the second position through the first valve core moving component.

5. The posture adjustment device according to claim 2, characterized in that: The actuator comprises a piston member (201) and a support member, wherein the support member is respectively connected to the piston member (201) and the trestle corridor, and during the movement of the piston member (201), the end of the trestle corridor is driven to rise and fall through the support member.

6. The posture adjustment device according to claim 5, characterized in that: The feedback mechanism (3) comprises: a screw nut pair, a gear pair and a second valve core moving assembly; the screw nut pair is connected to the piston member (201) and the gear pair respectively, and is used to convert the linear motion of the piston member (201) into the rotational motion of the gear pair, and the second valve core moving assembly drives the valve core to move from the second position to the first position by relying on the rotational motion.

7. The posture adjustment device according to claim 2, characterized in that: The actuator comprises a rotating shaft (211) and a rotating member, wherein the rotating member is respectively connected to the rotating shaft (211) and the trestle corridor, and the rotating member drives the trestle corridor to rotate during the rotation of the rotating shaft (211).

8. The posture adjustment device according to claim 7, characterized in that: The feedback mechanism (3) comprises: a gear pair and a second valve core moving assembly; the gear pair is connected to the rotating shaft (211) and the second valve core moving assembly respectively, the gear pair is used to transmit the rotational motion of the rotating shaft (211), and the second valve core moving assembly drives the valve core to move from the second position to the first position by relying on the rotational motion.

9. The posture adjustment device according to claim 2, characterized in that: The actuator comprises a gear member and a gear condition, wherein the gear condition is respectively connected to the gear member and the trestle corridor, and the trestle corridor is driven to extend and retract through the gear condition during the rotation of the gear member.

10. A trestle, characterized in that: include: A trestle corridor and a trestle corridor posture adjustment device as described in any one of claims 1 to 9.

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