CN115140634B - Cylinder self-locking device, lifter and control method - Google Patents
Cylinder self-locking device, lifter and control method Download PDFInfo
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- CN115140634B CN115140634B CN202210733542.4A CN202210733542A CN115140634B CN 115140634 B CN115140634 B CN 115140634B CN 202210733542 A CN202210733542 A CN 202210733542A CN 115140634 B CN115140634 B CN 115140634B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000009471 action Effects 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 8
- 238000003860 storage Methods 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/0423—Driving gear ; Details thereof, e.g. seals actuated pneumatically or hydraulically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a cylinder self-locking device, a lifter and a control method, which belong to the technical field of cylinders, wherein the cylinder self-locking device comprises a reversing valve, a pneumatic control valve and a pneumatic control output piece, and the reversing valve is communicated with an external air source and is configured to be driven by external force to change the direction of an air path so as to switch the action state of a lifting cylinder; the air channel inlet of the air control valve is communicated with the air outlet of the reversing valve; the pneumatic control output piece is connected with the pneumatic control valve; when the reversing valve is closed, the pneumatic control output piece locks the lifting cylinder; when the reversing valve is opened, the pneumatic control valve receives the air flow of the air passage of the reversing valve, so that the pneumatic control output piece responds to the action of the pneumatic control valve to unlock the lifting cylinder. The cylinder self-locking device provided by the invention can automatically lock when the lifting cylinder stops working, so that manual intervention is avoided, and the operation safety performance is improved.
Description
Technical Field
The application relates to the technical field of cylinder positioning equipment, in particular to a cylinder self-locking device, a lifter and a control method.
Background
The lifter generally uses the air cylinder as a main power component, and the air cylinder has the advantages of simple structure, low use cost, convenient operation and wide use. In the use process of the air cylinder, the extending position of the air cylinder cannot be kept at the same position for a long time due to factors such as stress load, air pressure of an air path, sealing of a piston, normal tiny leakage and the like, and the self-walking condition of the air cylinder is easy to occur during use, so that potential safety hazards occur.
The current method for preventing the self-walking of the cylinder is as follows: when the air cylinder is not used, the bolt is manually penetrated at the extending position of the air cylinder, so that the air cylinder is kept locked, and when the air cylinder is needed to be used, the bolt is pulled out, so that the air cylinder can act freely. When the method is adopted, the plugging and unplugging actions are required to be carried out manually frequently, time and labor are wasted, and meanwhile, misoperation or untimely operation are easy to occur.
Disclosure of Invention
Therefore, the application aims to provide a cylinder self-locking device, a lifter and a control method, so as to solve the problem of low efficiency in cylinder position locking in the prior art.
Based on the above object, the present application provides a cylinder self-locking device, comprising:
the reversing valve is characterized in that an air channel inlet is connected with an external air source, an air channel outlet is connected with the lifting cylinder, and the reversing valve is configured to be driven by external force to change the air channel airflow direction so as to switch the action state of the lifting cylinder;
the air inlet of the signal air source of the air control valve is connected with the air outlet of the reversing valve;
the pneumatic control output piece is connected with the pneumatic control valve;
When the reversing valve is closed, the pneumatic control output piece locks the lifting cylinder; when the reversing valve is opened, the pneumatic control valve receives the air flow of the air passage of the exhaust port, so that the pneumatic control output piece responds to the pneumatic control valve to act to unlock the lifting cylinder.
Further, a flow divider is connected to a pipeline between the reversing valve and the pneumatic control valve, and the flow divider is provided with a flow dividing branch capable of communicating with the outside.
Further, the reversing valve is a three-position four-way reversing valve or a three-position five-way reversing valve.
In addition, the application also provides an elevator, comprising:
A lifter body on which a guide rail is provided;
the lifting platform is slidably arranged on the lifter main body through the guide rail;
The action output end of the lifting cylinder is connected with the lifting platform so that the lifting platform is driven by the lifting cylinder to slide on the lifter main body;
the cylinder self-locking device according to any one of the above.
Further, an air channel inlet and/or an air channel outlet of the lifting air cylinder are/is connected with an air storage device.
Further, the pneumatic control output piece is a single-acting air cylinder arranged on the lifting platform, the action end of the single-acting air cylinder is connected with a positioning piece, and when the reversing valve is closed, the positioning piece is locked with the lifting main body so that the lifting air cylinder is in a locking state; when the reversing valve is opened, the piston of the single-acting cylinder is pushed by the input air flow to retract, so that the positioning piece releases the locking of the lifting cylinder.
Further, the locating piece is an optical axis bolt, the lifter main body is provided with a plurality of locating holes along the movement path of the lifting cylinder at intervals, and when the reversing valve is closed, the optical axis bolt can be inserted into the locating holes so as to lock the lifting cylinder.
Further, the pneumatic control output piece is a normally closed pneumatic guide rail clamp arranged on the lifting platform, and when the reversing valve is closed, the normally closed pneumatic guide rail clamp clamps a guide rail to enable the lifting cylinder to synchronously keep a locking state; when the reversing valve is opened, the normally closed pneumatic guide rail clamp releases the guide rail clamp so that the lifting cylinder can move freely.
Further, the pneumatic control output piece is provided with two symmetrical lifting platforms.
In addition, the application also provides a control method which is applied to the cylinder self-locking device and comprises the following steps:
when the lifting cylinder is in a static state, the reversing valve is in a closed state, the pneumatic control valve is in a gas-free circulation state, and the pneumatic control output piece locks the lifting cylinder;
when the lifting cylinder needs to act, the reversing valve is operated to open an external air source, the pneumatic control valve receives the air flow of the air path of the air outlet of the reversing valve, so that the pneumatic control output piece is driven to respond to the pneumatic control valve to act, and the locking of the lifting cylinder by the pneumatic control output piece is released.
According to the cylinder self-locking device provided by the invention, the air inlet of the signal air source of the pneumatic control valve is connected to the air outlet of the reversing valve, and the reversing valve inputs compressed air to control the cylinder to act, so that when the direction of the air outlet is switched by the reversing valve, the air input into the cylinder must flow back to the air outlet of the reversing valve to be discharged, and the other end of the cylinder can enter the air to push the cylinder to act.
By utilizing the principle, when the cylinder does not move, the reversing valve stops exhausting, the pneumatic control valve is in a normally closed state, and the pneumatic control output piece is locked with the lifting cylinder; when the cylinder moves, the pneumatic control valve is conducted by utilizing the pressure of the exhaust of the reversing valve, the locking state of the lifting cylinder is relieved, the whole process is quick in response, the pneumatic control output piece is timely unlocked when the lifting cylinder moves, and is timely locked when the lifting cylinder does not move, the piston rod is kept at a fixed position, the degree of automation is high, manual intervention can be avoided, and potential safety hazards caused by manual operation are eliminated.
Drawings
In order to more clearly illustrate the technical solutions of the present application or related art, the drawings that are required to be used in the description of the embodiments or related art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort to those of ordinary skill in the art.
FIG. 1 is a schematic diagram of a pneumatic circuit when the pneumatic control output member is a single-acting cylinder in an embodiment of the present application;
FIG. 2 is a schematic view of a structure of an elevator in which the pneumatic output member is a single-acting cylinder according to an embodiment of the present application;
FIG. 3 is a schematic view of a portion of the structure of FIG. 2;
FIG. 4 is a schematic diagram of a pneumatic circuit when the pneumatic output member is a normally closed pneumatic rail clamp in an embodiment of the present application;
fig. 5 is a schematic view of a part of the structure of the pneumatic control output member in the embodiment of the present application when the pneumatic control output member is a normally closed pneumatic guide rail clamp.
Reference numerals
1. A lifting cylinder; 2. a reversing valve; 3. a pneumatic control valve; 4. a positioning piece; 5. a coupling; 6. a gas storage device; 7. a single-acting cylinder; 8. an orifice plate; 9. an external air source; 10. a shunt; 11. a normally closed pneumatic guide rail clamp; 12. a guide rail; 13. an elevator main body; 14. and lifting the platform.
Detailed Description
The present application will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present application should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "first," "second," and the like, as used in embodiments of the present application, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiment provides a cylinder self-locking device, which can be applied to the production process of hollow glass, and can be also used for partition material assembly or other process flows needing positioning.
The embodiment provides a cylinder self-locking device which can be applied to equipment needing to lock the position of a cylinder, and the cylinder on an elevator is used for illustration in the embodiment.
The air cylinder self-locking device provided by the embodiment comprises a reversing valve 2, an air control valve 3 and an air control output piece, wherein an air passage inlet of the reversing valve 2 is connected with an external air source 9, an air passage outlet of the reversing valve 2 is connected with the lifting air cylinder 1, and the reversing valve 2 is configured to be driven by external force to change the air passage air flow direction so as to switch the action state of the lifting air cylinder 1; the air channel inlet of the air control valve 3 is communicated with the air outlet of the reversing valve 2; the pneumatic control output piece is connected with the pneumatic control valve 3; when the reversing valve 2 is closed, the pneumatic control output piece locks the lifting cylinder 1; when the reversing valve 2 is opened, the pneumatic control valve 3 receives the air flow of the air channel of the air outlet, so that the pneumatic control output piece responds to the pneumatic control valve 3 to act to unlock the lifting cylinder.
According to the cylinder self-locking device provided by the embodiment, the air inlet of the signal air source of the pneumatic control valve 3 is connected to the air outlet of the reversing valve 2, and the reversing valve 2 is required to input compressed air to control the action of the cylinder, when the direction of the air outlet is switched by the reversing valve 2, the air which is input into the cylinder must flow back to the air outlet of the reversing valve 2 to be discharged, so that the air at the other end of the cylinder enters the air to push the cylinder to act.
In some embodiments, the reversing valve 2 is preferably a three-position four-way reversing valve operated manually to ensure proper operation of the cylinders on the elevator. When the three-position four-way reversing valve is adopted, the air passage inlet of the reversing valve 2 is communicated with an external air source 9, the air passage outlet is communicated with the lifting air cylinder 1, the air outlet is connected with the pneumatic control valve 3, and the valve core of the reversing valve 2 is communicated with the air passage inlet and the air outlet by manually pulling the operating rod of the reversing valve 2, so that the air cylinder performs up-and-down motion.
In some embodiments, the reversing valve 2 may also be a three-position five-way reversing valve 2, or other reversing valve apparatus that can suitably control the operation of the cylinder.
In some embodiments, the reversing valve 2 may also use a solenoid valve, so long as the direction of the air flow path of the reversing valve 2 can be changed by being driven by external force.
The reversing valve 2 in the embodiment preferably adopts a reversing valve 2 structure in a middle sealing mode, the valve core of the reversing valve 2 in the middle sealing mode has a middle position in the static state, and the exhaust port and the air path inlet are both in a closed state in the static state, so that the air control valve 3 is not influenced by the air flow of the reversing valve 2 in the static state, and the air control output piece is ensured to always keep locking on a lifting platform where the lifting cylinder 1 is positioned in the static state; in addition, the reversing valve 2 in the middle sealing mode can also enable the lifting cylinder 1 to keep a normal static state when not started, so that the working performance of the lifting cylinder 1 is ensured.
The pneumatic control valve 3 in this embodiment may adopt a common two-position three-way pneumatic control valve shown in fig. 1, and after receiving the external air flow, the valve core in the pneumatic control valve 3 acts to reverse the air flow, so that the air flow discharged from the air path outlet drives the pneumatic control output member to act.
As shown in fig. 1, in some embodiments, a diverter 10 is connected to a pipeline between the pneumatic control valve 3 and the reversing valve 2, the diverter 10 is provided with a first regulating valve for regulating the pressure of the air flow flowing into the pneumatic control valve 3, specifically, the diverter 10 may use a tee joint communicated with the air outlet of the reversing valve 2, one branch outlet of the diverter 10 is used for connecting with the air channel inlet of the pneumatic control valve 3, the other branch outlet is connected with the external atmosphere, and because the air channel airflow actually required by the pneumatic control valve 3 is very small, the redundant air flow discharged from the air outlet of the reversing valve 2 can flow out to the external atmosphere through the branch outlet, thereby facilitating the quick air discharge of the air outlet of the reversing valve 2 and ensuring the normal operation of the air cylinder.
Further, a first regulating valve is arranged on a branch of the flow divider 10, which is used for being connected with the pneumatic control valve 3, a second regulating valve is arranged on a branch of the flow divider 10, which is used for being connected with the external atmosphere, the opening degrees of the first regulating valve and the second regulating valve are adjustable, the opening degree of the first regulating valve is adjusted to adjust the air flow quantity entering the pneumatic control valve 3, so that an air source entering the pneumatic control valve 3 has a certain pressure to drive a valve core of the pneumatic control valve 3 to act, and meanwhile, when the air cylinder needs to exhaust, redundant air flow can be rapidly discharged through adjusting the opening degree of the second regulating valve, so that the air cylinder is rapidly restored to a movable state.
Based on the same inventive concept, the application also provides an elevator, which comprises an elevator main body 13, an elevator platform 14 arranged on the elevator main body 13, an elevator cylinder and the cylinder self-locking device. As shown in the figure, a guide rail 12 is provided on the elevator main body 13 in the height direction, a lifting platform 14 is slidably provided on the elevator main body 13 via the guide rail 12, and an operation output end of the lifting cylinder is connected to the lifting platform 14, so that the lifting platform 14 is driven by the lifting cylinder to slide along the guide rail 12 relative to the elevator main body 13.
As shown in fig. 1, in some embodiments, the gas channel inlets or gas channel outlets on two sides of the lifting cylinder 1 are respectively connected with a gas storage device 6, where the gas storage device 6 can adopt the existing mature gas storage tank, and here, a gas storage tank with a capacity greater than 500ml is preferably selected, and the gas storage tank is arranged to expand the volume of the lifting cylinder 1, so that the gas impact effect in the lifting cylinder 1 is more obvious, and the gas flow pressure received by the pneumatic control valve 3 reaches the standard capable of impacting the valve core to change. In some embodiments, the gas path inlet and the gas path outlet of the lifting cylinder 1 are respectively provided with a gas storage device 6.
As shown in fig. 1 to 3, in some embodiments, the pneumatic control output member is a single-acting cylinder 7 disposed on the lifting platform 14, the actuating end of the single-acting cylinder 7 is connected with the positioning member 4, and when the reversing valve 2 is closed, the piston rod of the single-acting cylinder 7 drives the positioning member 4 to extend out and lock with the lifter main body 13, so that the lifting cylinder is in a locking state. Here, the single-acting cylinder 7 may adopt a conventional mature cylinder technology, and the principle is that in a natural state, the extension end of the single-acting cylinder 7 is extended by the pushing force of an internal spring, and when an air source is input, the extension end of the single-acting cylinder 7 is retracted by spring compression.
Specifically, the lifter main body 13 is an aluminum alloy type frame, the acting end of the lifting cylinder 1 is connected with the bottom end of the lifting platform 14, so that the lifting platform 14 slides on the frame along the guide rail 12, the single-acting cylinder 7 is mounted on the lifting platform 14, one side of the lifter main body 13 is provided with the hole plate 8 along the movement path of the lifting cylinder 1, a plurality of positioning holes are formed in the hole plate 8 at intervals, the single-acting cylinder 7 is horizontally arranged on the lifting platform 14, and when the reversing valve 2 is closed, the positioning piece 4 on the single-acting cylinder 7 can be inserted into the positioning holes, so that the lifting cylinder 1 is fixed on the frame.
As shown in fig. 3, further, the positioning member 4 in the embodiment may adopt an existing optical axis pin, the positioning member 4 is connected with the single-acting cylinder 7 through the coupling 5, and the end portion of the positioning member 4 is preferably a conical end, so that the positioning member 4 is more time-saving and labor-saving when being inserted into the positioning hole, and the plugging and unplugging resistance is reduced; in addition, the conical section can compensate the axial deviation of the positioning hole and the positioning piece 4 to a certain extent, so that the axial line of the positioning piece 4 and the axial line of the positioning hole can be inserted and fixed within a certain range of errors.
Here, it should be noted that the pneumatic control valve 3 should be a normally closed pneumatic control valve device, that is, when no external force and no air flow exist, the piston rod on the single-acting cylinder 7 is in an extended state, and the positioning piece 4 is inserted, positioned and kept locked; when the air control valve 3 receives external air flow reversing, the piston rod in the single-acting air cylinder 7 is retracted by pressure change to enable the positioning piece 4 to be separated from the positioning hole, and at the moment, the spring in the single-acting air cylinder 7 is in a compressed state, and the lifting air cylinder 1 can act freely.
In some embodiments, the single-acting air cylinders 7 are arranged on the end surface of one side, close to the guide rail, of the lifting platform 14, the single-acting air cylinders 7 are two symmetrically arranged relative to the lifting platform 14, the two sides of the lifting main body 13 are respectively provided with the hole plates 8, the air control valves 3 respectively output air flows to the two single-acting air cylinders 7, so that the two single-acting air cylinders 7 synchronously act and the positioning pieces 4 are inserted into the positioning holes of the hole plates 8, and the two single-acting air cylinders 7 are arranged to further improve the locking strength of the lifting air cylinders and avoid shaking of the lifting air cylinders.
As shown in fig. 4 and 5, in some embodiments, the pneumatic control output member may employ an existing mature normally closed pneumatic rail clamp 11, which operates on the principle that an air source is used as a power source, and when no air flow enters, a wedge block of the clamp keeps pressing on a side surface of the rail 12, and a clamping function is realized by using friction force between the wedge block and the rail 12, and when the air flow enters, the air source pushes a piston of the clamp to separate the wedge block from the side surface of the rail 12, so as to contact clamping on the rail 12.
Specifically, when the lifting cylinder 1 works normally, the reversing valve 2 is in an open state, and air flow discharged from the air outlet enters the normally closed type air pressure guide rail clamp 11 through the air control valve 3, so that the normally closed type air pressure guide rail clamp 11 releases the clamp state of the guide rail 12; when the reversing valve 2 is closed, the normally closed pneumatic rail clamp 11 clamps the guide rail 1212, and the normally closed pneumatic rail clamp 11 is fixed to the lifting platform 14, so that the lifting cylinder 1 and the lifting platform 14 synchronously operate, thereby forming a locking state of the lifting cylinder 1.
In some embodiments, two sides of the lifting platform 14 are respectively connected to the lifting main body 13 in a sliding manner through the guide rails 12, two normally-closed air pressure guide rail clamps 11 are respectively arranged on two sides of the lifting platform 14, each normally-closed air pressure guide rail clamp 11 is respectively matched with one guide rail 12, and the air control valve 3 can respectively output air flow to the two normally-closed air pressure guide rail clamps, so that the two normally-closed air pressure guide rail clamps can synchronously clamp the guide rails, and the arrangement can further improve the stability of the lifting cylinder in locking.
It should be noted that, in this embodiment, the self-locking structure of the cylinder is designed based on the change of the action principle of the cylinder, and as an alternative implementation manner, the self-locking structure may be applied to a hydraulic cylinder structure, and the pneumatic control valve 3 and the steering valve may be of a hydraulic control valve type, so long as the pressure change of the steering valve 2 is used to make the cylinder or the hydraulic cylinder realize the self-locking function, which is within the protection scope of the present application.
In some embodiments, the lifting cylinder 1 may also be provided on other equipment than an elevator.
In addition, the disclosure also provides a control method applied to the cylinder self-locking device, and the control method comprises the following steps:
When the lifting cylinder 1 is in a static state, the reversing valve 2 is in a closed state, the pneumatic control valve 3 is in a gas-free circulation state, and the pneumatic control output piece is clamped with the lifting cylinder 1 to keep a locking state;
When the lifting cylinder 1 needs to act, the reversing valve 2 is operated to open an external air source 9, the air control valve 3 receives the air flow of the air passage of the air outlet of the reversing valve 2, so as to drive the air control output piece to respond to the air control valve 3 to act, and the air control output piece releases the locking of the lifting cylinder 1.
Here, in order to ensure that the pneumatic control output member works normally, the opening degrees of the first regulating valve and the second regulating valve may be adjusted so as to sufficiently release the surplus gas on the premise of ensuring the input gas source pressure of the pneumatic control valve 3.
It should be noted that the foregoing describes some embodiments of the present application. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments described above and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the application (including the claims) is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the application, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the application as described above, which are not provided in detail for the sake of brevity.
The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, and the like, which are within the spirit and principles of the embodiments of the application, are intended to be included within the scope of the application.
Claims (10)
1. A cylinder self-locking device, comprising:
the reversing valve is characterized in that an air channel inlet is connected with an external air source, an air channel outlet is connected with the lifting cylinder, and the reversing valve is configured to be driven by external force to change the air channel airflow direction so as to switch the action state of the lifting cylinder;
The inlet of the signal air source of the pneumatic control valve is connected with the exhaust port of the reversing valve;
the pneumatic control output piece is connected with the pneumatic control valve;
When the reversing valve is closed, the pneumatic control output piece locks the lifting cylinder; when the reversing valve is opened, the pneumatic control valve receives the air flow of the air passage of the exhaust port, so that the pneumatic control output piece responds to the pneumatic control valve to act to unlock the lifting cylinder.
2. The cylinder self-locking device according to claim 1, wherein a flow divider is connected to a pipeline between the reversing valve and the pneumatic control valve, and the flow divider is provided with a flow dividing branch capable of communicating with the outside.
3. The cylinder self-locking device according to claim 1, wherein the reversing valve is a three-position four-way reversing valve or a three-position five-way reversing valve.
4. An elevator, characterized by comprising:
A lifter body on which a guide rail is provided;
the lifting platform is slidably arranged on the lifter main body through the guide rail;
The action output end of the lifting cylinder is connected with the lifting platform so that the lifting platform is driven by the lifting cylinder to slide on the lifter main body;
a cylinder self-locking device according to any one of claims 1 to 3.
5. The lift according to claim 4, wherein the gas path inlet and/or the gas path outlet of the lift cylinder is connected with a gas storage device.
6. The elevator according to claim 4, wherein the pneumatic control output member is a single-acting cylinder provided on the lifting platform, an action end of the single-acting cylinder is connected with a positioning member, and when the reversing valve is closed, the positioning member is locked with the elevator main body so as to enable the lifting cylinder to be in a locked state; when the reversing valve is opened, the piston of the single-acting cylinder is pushed by the input air flow to retract, so that the positioning piece releases the locking of the lifting cylinder.
7. The lift of claim 6, wherein the positioning member is an optical axis plug, the lift body is provided with a plurality of positioning holes at intervals along a movement path of the lift cylinder, and the optical axis plug can be inserted into the positioning holes to lock the lift cylinder when the reversing valve is closed.
8. The lift of claim 4, wherein the pneumatic output member is a normally closed pneumatic rail clamp provided on the lift platform, the normally closed pneumatic rail clamp clamping a rail to limit the lift cylinder motion when the reversing valve is closed; when the reversing valve is opened, the normally closed pneumatic guide rail clamp releases the guide rail clamp so that the lifting cylinder can move freely.
9. The lift of claim 4, wherein the pneumatic output has two symmetrically disposed on the lift platform.
10. Control method, characterized in that it is applied to a cylinder self-locking device according to any one of claims 1-3, and comprises the following steps:
when the lifting cylinder is in a static state, the reversing valve is in a closed state, the pneumatic control valve is in a gas-free circulation state, and the pneumatic control output piece locks the lifting cylinder;
when the lifting cylinder needs to act, the reversing valve is operated to open an external air source, the pneumatic control valve receives the air flow of the air path of the air outlet of the reversing valve, so that the pneumatic control output piece is driven to respond to the pneumatic control valve to act, and the locking of the lifting cylinder by the pneumatic control output piece is released.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210733542.4A CN115140634B (en) | 2022-06-24 | 2022-06-24 | Cylinder self-locking device, lifter and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210733542.4A CN115140634B (en) | 2022-06-24 | 2022-06-24 | Cylinder self-locking device, lifter and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115140634A CN115140634A (en) | 2022-10-04 |
| CN115140634B true CN115140634B (en) | 2024-05-03 |
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