CN114992104B - Star-delta emergency starting control cabinet - Google Patents
Star-delta emergency starting control cabinet Download PDFInfo
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- CN114992104B CN114992104B CN202210497720.8A CN202210497720A CN114992104B CN 114992104 B CN114992104 B CN 114992104B CN 202210497720 A CN202210497720 A CN 202210497720A CN 114992104 B CN114992104 B CN 114992104B
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- Prior art keywords
- limiting
- emergency
- star
- rod
- delta
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application relates to the technical field of control cabinets, in particular to a star-delta emergency starting control cabinet, which comprises: the emergency cabinet comprises a cabinet body, an emergency handle, a star-delta voltage reduction starter, a starting rotating rod, a limiting device and the like; the limiting rod moves upwards under the running fit of the limiting wheel until the limiting rod is embedded into the limiting groove at the outer side of the starting rotating rod, so that when the control circuit works normally, even if a person without management authority enters a fire pump room under a non-emergency condition, the emergency handle at the outer side of the door of the control cabinet cannot be rotated; when an emergency occurs, the limiting wheel pair limiting rod is in vertical limiting failure, and the limiting rod moves downwards due to dead weight, so that the limiting rod is separated from the limiting groove on the starting rotating rod. At the moment, a person with management authority comes to the fire pump room and can immediately rotate the emergency handle, so that the fire pump is started rapidly through the mechanical emergency starting device.
Description
Technical Field
The application relates to the technical field of control cabinets, in particular to a star-delta belt emergency starting control cabinet.
Background
The control cabinet is to assemble the switch equipment, the measuring instrument, the protection electrical appliance and the auxiliary equipment in the metal cabinet or on the screen according to the electrical wiring requirement, and the arrangement of the control cabinet meets the requirement of normal operation of the power system, is convenient to overhaul and does not endanger the safety of personnel and surrounding equipment. The measuring instrument can display various parameters in operation, can also adjust certain electrical parameters, prompts or sends out signals when the electric parameters deviate from a normal working state, and common starting modes include variable frequency starting, soft starting, star-delta starting and auto-coupled voltage reduction starting. The star-delta starting mode is widely applied to various occasions such as water supply, water discharge, fire fighting and the like of industrial and agricultural production and various buildings.
Regarding the star-delta starting control cabinet for fire control, according to the specification of the technical Specification of fire control water supply and fire hydrant system GB50974-2014, the fire pump control cabinet should be provided with a mechanical emergency starting function, and when a control circuit in the control cabinet fails and a fire pump can not be started automatically or manually, the fire pump is started in emergency by personnel with management authority by means of the mechanical emergency starting device arranged in the fire pump room. In view of this provision, in the prior art, a handle is installed at the outer side of a cabinet door of a control cabinet and is connected with a mechanical emergency starting device in the cabinet door, and when an emergency occurs, the fire-fighting water pump can be started emergently through the mechanical emergency starting device by rotating the handle.
However, because the fire pump can be started by only rotating the handle of the mechanical emergency starting device, when personnel without management authority enter the fire pump room in a non-emergency situation, the handle can be directly rotated, so that the mechanical emergency starting device has the hidden trouble of misoperation; in order to avoid the situation, in the prior art, locking is usually performed at the handle position, so that only when a person with management authority carries a key, the handle can be unlocked and rotated; however, lock the handle for take place emergency, when needs start fire pump through the emergent starting drive of machinery, have management authority personnel need to unlock the handle through the key to prolonged the time of starting fire pump through the emergent starting drive of machinery under emergency, especially if the smoke and dust that the conflagration produced has got into fire pump room, under the influence of smoke and dust this moment, will lead to having management authority personnel to unlock the time spent of handle through the key further increase, make fire pump be difficult to through the emergent starting drive quick start of machinery under emergency, thereby lead to the destruction expansion that the fire accident caused.
In view of the above, in order to overcome the technical problems, the application provides a star-delta emergency starting control cabinet.
Disclosure of Invention
In order to make up for the defects of the prior art, the star-delta emergency starting control cabinet provided by the application has the advantages that when a control circuit works normally, the limiting rod moves upwards under the running fit of the limiting wheel until the limiting rod is embedded into the limiting groove at the outer side of the starting rotating rod, so that when the control circuit works normally, even if a person without management authority enters a fire pump room under the non-emergency condition, the emergency handle at the outer side of the control cabinet can not be rotated, and the misoperation of an irrelevant person on a mechanical emergency starting device is avoided; when an emergency occurs and the control circuit fails, the fan shaft power device connected with the control circuit is powered off, the vertical limit of the limit wheel pair limit rod fails, and the limit rod moves downwards due to dead weight so as to be separated from the limit groove on the starting rotating rod; at the moment, a person with management authority comes to the fire pump room and can immediately rotate the emergency handle, so that the fire pump is started rapidly through the mechanical emergency starting device.
The technical scheme adopted for solving the technical problems is as follows: the application relates to a star-delta emergency starting control cabinet, which comprises:
a cabinet body;
the emergency handle is rotatably connected to the outer side of the cabinet door of the cabinet body;
the supporting plate is fixedly connected in the cabinet body;
further comprises:
a mechanical emergency starting device, the mechanical emergency starting device comprising:
the star-delta voltage reduction starter is fixedly arranged on the supporting plate;
one end of the starting rotating rod is rotatably connected to the star-delta voltage reduction starter, and the other end of the starting rotating rod is clamped on a corresponding clamping groove of the emergency handle rotating shaft;
and the limiting device is used for limiting the rotation of the starting rotating rod.
Preferably, the limiting device includes:
the limiting frame is of a type structure and is fixedly connected with the bottom of the cabinet body, and the length of the limiting frame is lower than the height of the starting rotating rod in the cabinet body;
the limiting rod is connected in the limiting frame in a sliding manner, and a limiting strip is fixedly connected to the middle part of one side of the opening of the limiting frame;
the limiting groove is formed in the outer side of the starting rotating rod and is clamped with the top end of the limiting rod;
a power device;
the fan shaft is positioned below the cabinet body, blades are uniformly and fixedly connected to the circumferential surface of one end, close to the cabinet body, of the fan shaft, and the fan shaft penetrates through the cabinet body and is fixedly connected with the power device;
the limiting wheel is fixedly connected to the other end of the fan shaft and is matched with a limiting strip on the limiting rod.
Preferably, the limit bar and the limit wheel comprise two matching modes of meshing with the gear through the rack or friction contact between the friction bar and the friction wheel.
Preferably, a compression spring is fixedly connected between the bottom of the limiting rod and the cabinet body, and a flexible rubber strip is fixedly connected to the bottom end of the limiting strip.
Preferably, the surface of one side of the limit bar fixedly connected with the limit bar is a smooth surface.
Preferably, the limit wheel comprises:
the limiting wheel body is internally and uniformly provided with sliding grooves and fixedly connected with the fan shaft;
the wheel frame is rotationally connected to the fan shaft and fixedly connected with the limiting frame;
the friction block is connected in the sliding groove in a sliding way;
one end of the spring rod is fixedly connected with the fan shaft, and the other end of the spring rod is fixedly connected with the friction block.
Preferably, the opening at the outer edge of the wheel frame is smaller than the thickness of the friction block, and is used for blocking and limiting one end, which is in contact with the limiting strip, of the friction block.
Preferably, the inner wall of the sliding groove is connected with a return blocking block in a sliding manner, and return blocking grooves are uniformly distributed on the corresponding side wall of the friction block.
Preferably, the return blocking block extends into the return blocking groove, and the part of the return blocking block extending into the return blocking groove is identical to the return blocking groove.
Preferably, the other shape of the top end of the limiting rod is a truncated cone with a gradually decreasing section from bottom to top.
The beneficial effects of the application are as follows:
1. when the control circuit works normally, the limiting rod moves upwards under the running fit of the limiting wheel until the limiting rod is embedded into the limiting groove at the outer side of the starting rotating rod, so that when the control circuit works normally, even if a person without management authority enters a fire pump room in a non-emergency condition, the emergency handle at the outer side of the control cabinet door cannot be rotated, and misoperation of an irrelevant person on a mechanical emergency starting device is avoided; when an emergency occurs, the control circuit breaks down, the fan shaft power device connected with the control circuit is powered off, and at the moment, the limiting wheel fails to vertically limit the limiting rod, and the limiting rod moves downwards due to dead weight, so that the limiting rod is separated from the limiting groove on the starting rotating rod. The personnel who has management authority come to the fire pump room at this moment can rotate emergent handle immediately thereby can start fire pump through mechanical emergent starting drive fast, in time handles the conflagration condition, reduces the loss of life and property that the conflagration leads to.
2. When an emergency state occurs, even if a worker with management authority is inconvenient or cannot reach the fire pump room as soon as possible, other workers can be informed of driving to the fire pump room at the first time to start the fire pump emergently through the mechanical emergency starting device, so that the starting efficiency is improved; on the other hand, the application only controls the limit of the starting rotating rod, but does not directly control whether the starting rotating rod rotates or not, thereby avoiding the false start of the mechanical emergency starting device caused by the fault of the limiting device; the power device of the fan shaft is connected with the control switch of the control circuit terminal, so that the limiting device can be manually closed through the control switch when the control cabinet is regularly overhauled, and the overhaul of the mechanism in the control cabinet is facilitated.
Drawings
The application is further described below with reference to the accompanying drawings.
FIG. 1 is an overall block diagram of the present application;
FIG. 2 is a block diagram of the inside of the cabinet of the first mode of engagement of the spacing bars and spacing wheels of the present application;
FIG. 3 is a block diagram of the inside of the cabinet of the present application in a second mode of engagement of the spacing bars and spacing wheels;
fig. 4 is an enlarged view at a in fig. 2;
fig. 5 is an enlarged view at B in fig. 3;
FIG. 6 is a partial cross-sectional view of a stop lever of the present application;
FIG. 7 is a front cross-sectional view of the spacing wheel in a second mating mode of the present application;
FIG. 8 is a top cross-sectional view of a spacing wheel and a spacing lever in a second mating arrangement of the present application;
FIG. 9 is a partial cross-sectional view of the first engagement of the actuator lever and the stop lever of the present application;
FIG. 10 is a partial cross-sectional view of the second mode of engagement of the actuator lever with the stop lever of the present application.
In the figure: 1. a cabinet body; 2. an emergency handle; 3. a support plate; 4. a mechanical emergency starting device; 5. star-delta step-down starter; 6. starting a rotating rod; 7. a limiting device; 8. a limit frame; 9. a limit rod; 10. a limit bar; 11. a limit groove; 12. a fan shaft; 13. a fan blade; 14. a limiting wheel; 15. a compression spring; 16. a wheel frame; 17. a sliding groove; 18. a friction block; 19. a spring rod; 20. a return blocking block; 21. and blocking back to the groove.
Detailed Description
The application is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the application easy to understand.
The application provides a star-delta belt emergency starting control cabinet, which solves the technical problem that the mechanical emergency starting device 4 of the existing fire pump control cabinet is difficult to quickly start under emergency when preventing misoperation of irrelevant personnel.
The technical scheme in the embodiment of the application aims to solve the technical problems, and the overall thought is as follows:
when the control circuit works normally, the limiting rod 9 moves upwards under the running fit of the limiting wheel 14 until the limiting rod 9 is embedded into the limiting groove 11 at the outer side of the starting rotating rod 6, so that when the control circuit works normally, even if a person without management authority enters a fire pump room in a non-emergency condition, the emergency handle 2 at the outer side of the control cabinet door cannot be rotated, and misoperation of an irrelevant person on the mechanical emergency starting device 4 is avoided; when an emergency occurs and the control circuit fails, the power device of the fan shaft 12 connected with the control circuit is powered off, and at the moment, the limiting wheels 14 fail in vertical limiting of the limiting rod 9, and the limiting rod 9 moves downwards due to dead weight, so that the limiting rod is separated from the limiting groove 11 on the starting rotating rod 6. At the moment, a person with management authority comes to a fire pump room and can immediately rotate the emergency handle 2 so as to quickly start the fire pump through the mechanical emergency starting device 4.
For a better understanding of the technical solutions of the present application, the following detailed description will refer to the drawings and to specific embodiments.
Example 1:
the embodiment provides a star-delta area emergency start control cabinet, includes:
a cabinet body 1;
the emergency handle 2 is rotatably connected to the outer side of a cabinet door of the cabinet body 1;
the supporting plate 3 is fixedly connected in the cabinet body 1;
further comprises:
a mechanical emergency starting device 4, the mechanical emergency starting device 4 comprising:
the star-delta step-down starter 5 is fixedly arranged on the supporting plate 3;
the starting rotary rod 6, one end of the starting rotary rod 6 is rotatably connected to the star-delta step-down starter 5, and the other end of the starting rotary rod is clamped on a corresponding clamping groove of the rotating shaft of the emergency handle 2;
and the limiting device 7 is used for limiting the rotation of the starting rotating rod 6.
The limiting device 7 comprises:
the limiting frame 8 is of a type structure and is fixedly connected with the bottom of the cabinet body 1, and the length of the limiting frame 8 is lower than the height of the starting rotating rod 6 in the cabinet body 1;
the limiting rod 9 is slidably connected in the limiting frame 8, and a limiting strip 10 is fixedly connected to the middle of the opening side of the limiting frame 8 on the limiting rod 9;
the limiting groove 11 is formed in the outer side of the starting rotating rod 6 and is clamped with the top end of the limiting rod 9;
a power device;
the fan shaft 12 is positioned below the cabinet body 1, the circumferential surface of one end, close to the cabinet body 1, of the fan shaft 12 is uniformly and fixedly connected with fan blades 13, and the fan shaft 12 penetrates through the cabinet body 1 and is fixedly connected with the power device;
the limiting wheel 14, limiting wheel 14 links to each other with the fan axle 12 other end, limiting wheel 14 cooperatees with spacing 10 on the gag lever post 9.
In this embodiment, the limit bar 10 and the limit wheel 14 are engaged with each other through a rack and a gear.
When no fire occurs, the control circuit of the star-delta emergency starting control cabinet is in a normal working state, the fan shaft 12 positioned below the cabinet body 1 is controlled by a control switch of a control circuit terminal to control a power device, such as a motor, and is in a starting state, so that the fan shaft 12 fixedly connected with an output shaft of the motor rotates, at the moment, the fan shaft 12 and the fan blades 13 uniformly and fixedly connected with the circumferential surface of one end of the fan shaft, which is close to the cabinet body 1, rotate to cool an electric control element in the cabinet body 1, and the possibility of failure of the control circuit due to heat accumulation during the working of the electric control element in the cabinet body 1 is reduced; the limiting wheel 14 fixedly connected with the other end of the fan shaft 12 far away from the fan blades 13 rotates along with the rotation of the fan shaft 12, and the limiting bar 10 meshed with the limiting wheel 14 and fixedly connected to the limiting bar 9 is driven to move upwards in the rotating process of the limiting wheel 14, so that the limiting bar 9 slides upwards in the limiting frame 8 until the bottom of the limiting bar 10 is only contacted with the limiting wheel 14, at the moment, the rising distance of the limiting bar 9 just enables the upper end of the limiting bar 9 to be clamped with the limiting groove 11 on the starting rotating rod 6, therefore, when no disaster occurs, the control circuit of the star-delta belt emergency starting control cabinet is in a normal working state, when the mechanical emergency starting device 4 is not required to be started, the starting rotating rod 6 of the mechanical emergency starting device 4 is limited, and then the rotating shaft of the clamped emergency handle 2 is limited, and even if a person with or without management authority enters a fire pump room, the emergency handle 2 outside a control cabinet door cannot be rotated, and the technical effect of avoiding misoperation of the mechanical emergency starting device 4 by unrelated persons in the normal state is achieved;
when a fire occurs, the control circuit of the control cabinet is burnt out and the emergency that the fire-fighting water pump cannot be started remotely through the control circuit occurs, and the control circuit is powered off due to the burning failure of the control circuit, so that the power device of the fan shaft 12 connected with the control circuit in series is powered off and stops running, at the moment, the fan shaft 12 and the limiting wheel 14 fixedly connected with the fan shaft 12 are not driven by the power device any more, the limiting rod 9 slides downwards under the action of self gravity, the limiting strip 10 positioned at the upper end of the limiting wheel 14 and fixed on the limiting rod 9 also moves downwards along with the limiting rod, and is meshed with the limiting wheel 14 in the downward movement process, so that the limiting wheel 14 and the fan shaft 12 which are not driven by the power device rotate reversely; when a worker with management authority catches up with the fire pump room, the limiting rod 9 slides downwards to the bottom of the cabinet body 1, the limiting rod 9 is completely separated from the limiting groove 11 on the starting rotating rod 6, and the rotation limit on the starting rotating rod 6 is completely eliminated; at the moment, a worker with management authority can drive the starting rotating rod 6 in the cabinet door to rotate only by immediately rotating the emergency handle 2 outside the cabinet door, and the star-delta depressurization starter 5 is started, so that the fire pump is started rapidly, the fire situation is treated in time, and the life and property loss caused by the fire is reduced;
because the limit of the starting rod 6 is automatically switched along with the normal or not of the control circuit in the embodiment, the application can avoid misoperation of the mechanical emergency starting device 4 by irrelevant personnel in a normal state, and can inform other staff to drive to the fire pump room to emergently start the fire pump through the mechanical emergency starting device 4 in the first time when the staff with management authority is inconvenient or can not reach the fire pump room as soon as possible in an emergency state, thereby improving the starting efficiency of the mechanical emergency starting device 4 in the embodiment; on the other hand, in the embodiment, only the limit of the starting rotary rod 6 is controlled, and whether the starting rotary rod 6 rotates or not is not directly controlled, so that the false starting of the mechanical emergency starting device 4 caused by the fault of the limiting device 7 in the embodiment is avoided; the power device of the fan shaft 12 is connected with the control switch of the control circuit terminal, so that when the control cabinet is overhauled regularly, the cabinet door of the control cabinet is pulled by the cabinet door handle, the rotating shaft of the emergency handle on the cabinet door is separated from the starting rotating rod 6 correspondingly, the cabinet door is opened, the power device of the fan shaft 12 is connected with the control switch of the control circuit terminal, and the limiting device 7 is manually closed by the control switch, so that the mechanism in the control cabinet is overhauled conveniently.
In this embodiment, compression springs 15 are fixedly connected between the bottom of the limiting rod 9 and the cabinet body 1, and flexible rubber strips are fixedly connected to the bottom ends of the limiting strips 10.
In a normal working state, after the limit bar 10 on the limit bar 9 rises to be disengaged from the limit wheel 14, the limit bar 10 can move downwards due to the gravity of the limit bar 9 and the limit bar so as to continuously collide with the limit wheel 14 in rotation in the continuous rotation process of the limit wheel 14 along with the fan shaft 12; through fixedly connected with compression spring 15 between gag lever post 9 bottom and cabinet body 1, compression spring's elasticity is less than gag lever post 9 gravity, and compression spring 15 is in compression state at gag lever post 9 from beginning to move up until with the whole operational process of the complete block of spacing groove 11, because compression spring 15 is located the bottom of gag lever post 9, therefore compression spring 15 of compression state provides the elasticity of gag lever post 9 vertical upward all the time, the direction that compression spring 15 was restoreed to for when spacing 10 moves down and bump with spacing wheel 14, through the buffering of the flexible rubber strip that compression spring 15's elasticity and spacing 10 bottom end linked firmly, alleviate the dynamics of collision, thereby reduce the wearing and tearing that spacing wheel 14 and spacing 10 take place when the collision, the life of spacing wheel 14 and spacing 10 has been improved.
Example 2:
the difference from example 1 in this example is that:
in this embodiment, the limit bar 10 and the limit wheel 14 are in a friction contact fit with the friction wheel via friction bars.
In this embodiment, the surface of the side, on which the limit bar 9 is fixedly connected with the limit bar 10, is a smooth surface.
In this embodiment, the limiting wheel 14 includes:
the limiting wheel 14 comprises a limiting wheel 14 body, wherein sliding grooves 17 are uniformly formed in the limiting wheel 14 body and are fixedly connected with the fan shaft 12;
the wheel frame 16 is rotatably connected to the fan shaft 12, and the wheel frame 16 is fixedly connected with the limit frame 8;
a friction block 18, wherein the friction block 18 is slidably connected in the sliding groove 17;
and one end of the spring rod 19 is fixedly connected with the fan shaft 12, and the other end of the spring rod 19 is fixedly connected with the friction block 18.
In a normal working state, by adopting a matching mode that the limit bar 10 is in friction contact with the limit wheel 14, when the power device drives the fan shaft 12 to rotate, the limit wheel 14 body fixedly connected with the fan shaft 12 and the friction block 18 connected with the fan shaft 12 through the spring rod 19 are driven to rotate, and the limit bar 9 fixedly connected with the limit bar 10 is driven to move up and down in the limit frame 8 under the friction action of the friction block 18 made of non-metal materials with high friction coefficient, such as asbestos, until the limit bar 10 on the limit bar 9 rises to be out of contact with the limit wheel 14, and the upper end of the limit bar 9 stretches into the limit groove 11 on the starting rotating bar 6 and is completely clamped with the limit groove 11; after that, the limit wheel 14 is still driven by the fan shaft 12 to continuously rotate, and as the surface of one side of the limit bar 9 fixedly connected with the limit bar 10 is a smooth surface, after the limit bar 9 rises to the point that the limit bar 10 is separated from contact with the limit wheel 14, the limit wheel 14 is contacted with the smooth surface of the limit bar 9, at the moment, the friction force generated by the contact between the limit wheel 14 and the limit bar 9 is smaller, and the friction force is insufficient to drive the limit bar 9 to overcome the gravity of the limit bar to move upwards, so that the limit bar 9 is still at the position where the limit bar 10 is separated from the limit wheel 14; the difference of friction force generated by the surfaces of the limit wheel 14, the limit bar 10 and the limit bar 9 drives the limit bar 9 to move upwards in the limit frame 8 and to be static after the limit groove 11 is clamped, so that the collision phenomenon of the limit wheel 14 and the limit bar 10 in the working process in the embodiment 1 is avoided.
In this embodiment, the opening at the outer edge of the wheel frame 16 is smaller than the thickness of the friction block 18, so as to block and limit the contact end of the friction block 18 and the limit bar 10.
Because the limiting wheel 14 is in a friction state continuously in the working process, the friction blocks 18 inevitably wear, the friction blocks 18 are extruded outwards through the spring rods 19, and the friction blocks 18 are blocked and limited by the wheel frame 16, so that the friction blocks 18 can be always propped against the wheel frame 16 under the combined action of the two friction blocks when the friction blocks are worn, even if the outer edges of the friction blocks 18 are worn by the limiting strips 10 and the wheel frame 16 fixedly connected with the limiting strips, the friction blocks 18 can also extend outwards along the sliding grooves 17 in the wearing process, the diameter of the limiting wheel 14 is ensured to be always equal to the inner diameter of the wheel frame 16, the reduction of the extrusion force of the friction blocks 18 and the limiting strips 10 due to the wear of the friction blocks 18 is ensured, and the working stability of the limiting rod 9 is ensured.
In this embodiment, the inner wall of the sliding groove 17 is slidably connected with a return blocking block 20, and return blocking grooves 21 are uniformly distributed on the corresponding side walls of the friction block 18.
In this embodiment, the return block 20 extends into the return groove 21, and the portion of the return block 20 extending into the return groove 21 is the same as the return groove 21 in shape.
As wear increases, the outward force that spring rod 19 can provide against friction block 18 will also decrease as friction block 18 slides outward gradually; by the design of the return blocking blocks 20 which are connected with the inner wall of the sliding groove 17 in a sliding way and the return blocking grooves 21 which are uniformly distributed on the corresponding side walls of the friction blocks 18, even when the elastic force of the spring rod 19 is smaller than the extrusion force required between the friction blocks 18 and the limit bar 10, the friction blocks 18 which are extruded by the spring rod 19 and extend outwards can not shrink inwards due to the extrusion force between the friction blocks 18 and the limit bar 10 under the obstruction of the return blocking blocks 20 which extend into the return blocking grooves 21, so that the working stability of the limit bar 9 is further ensured.
The second shape of the top end of the stop lever 9 is a truncated cone shape with a gradually decreasing cross section from bottom to top, which is suitable for the above embodiments 1 and 2.
In the working process of the starting rotating rod 6 and the limiting rod 9, a certain rotation allowance and sliding errors inevitably exist, so that when the shape and the size of the top end of the limiting rod 9 are completely matched with the limiting groove 11 on the starting rotating rod 6, the situation that the limiting rod 9 cannot extend into the limiting groove 11 possibly exists; the second shape of the top end of the limiting rod 9 is designed into the round table shape with the cross section gradually reduced from bottom to top, so that the limiting rod 9 only needs to stretch into the limiting groove 11 from the small end at the top of the limiting rod 9 in the ascending process, the limiting rod 9 can stretch into the limiting groove 11 in the subsequent ascending process, and the rotation limiting of the starting rotating rod 6 is guaranteed.
In the description of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present application, and furthermore, the terms "first", "second", "third", etc. are merely used for distinguishing the description, and should not be construed as indicating or implying relative importance.
While there have been shown and described what are at present considered to be fundamental principles, main features and advantages of the present application, it will be understood by those skilled in the art that the present application is not limited to the foregoing embodiments, but rather, the foregoing embodiments and description illustrate only the principles of the application, and that various changes and modifications may be made therein without departing from the spirit and scope of the application as defined by the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.
Claims (8)
1. A star-delta emergency start control cabinet, comprising:
a cabinet body (1);
the emergency handle (2) is rotatably connected to the outer side of a cabinet door of the cabinet body 1;
the support plate (3), the said support plate (3) is fixedly connected in cabinet (1);
the method is characterized in that: further comprises:
-a mechanical emergency starting device (4), the mechanical emergency starting device (4) comprising:
the star-delta voltage reduction starter (5), and the star-delta voltage reduction starter (5) is fixedly arranged on the supporting plate (3);
one end of the starting rotating rod (6) is rotatably connected to the star-delta voltage reduction starter (5), and the other end of the starting rotating rod is clamped on a corresponding clamping groove of the rotating shaft of the emergency handle (2);
the limiting device (7) is used for limiting the rotation of the starting rotating rod (6);
the limiting device (7) comprises:
the limiting frame (8) is of a type structure and is fixedly connected with the bottom of the cabinet body (1), and the length of the limiting frame (8) is lower than the height of the starting rotating rod (6) in the cabinet body (1);
the limiting rod (9), the limiting rod (9) is connected in the limiting frame (8) in a sliding way, and the middle part of one side of the opening of the limiting frame (8) of the limiting rod (9) is fixedly connected with a limiting strip (10);
the limiting groove (11) is formed in the outer side of the starting rotating rod (6) and is clamped with the top end of the limiting rod (9);
a power device;
the fan shaft (12), the fan shaft (12) is positioned below the cabinet body (1) and is uniformly and fixedly connected with fan blades (13) on the circumferential surface of one end, close to the cabinet body (1), of the cabinet body (1), and the fan shaft (12) penetrates through the cabinet body (1) to be fixedly connected with the power device;
the limiting wheel (14) is connected with the other end of the fan shaft (12), and the limiting wheel (14) is matched with a limiting strip (10) on the limiting rod (9);
the limiting strip (10) and the limiting wheel (14) comprise two matching modes of meshing with the gear through a rack or friction contact between a friction strip and the friction wheel.
2. The star-delta emergency starting control cabinet according to claim 1, wherein a compression spring (15) is fixedly connected between the bottom of the limiting rod (9) and the cabinet body (1), and a flexible rubber strip is fixedly connected to the bottom end of the limiting strip (10).
3. The star-delta emergency starting control cabinet according to claim 1, wherein: the surface of one side of the limiting rod (9) fixedly connected with the limiting strip (10) is a smooth surface.
4. The star-delta emergency starting control cabinet according to claim 1, wherein: the limit wheel (14) comprises:
the limiting wheel (14) body is internally and uniformly provided with sliding grooves (17) and is fixedly connected with the fan shaft (12);
the wheel frame (16), the wheel frame (16) is rotatably connected to the fan shaft (12), and the wheel frame (16) is fixedly connected with the limit frame (8);
the friction block (18), the said friction block (18) is slidably connected in the slide groove (17);
and one end of the spring rod (19) is fixedly connected with the fan shaft (12), and the other end of the spring rod (19) is fixedly connected with the friction block (18).
5. The star-delta emergency starting control cabinet according to claim 4, wherein: the outer edge opening of the wheel frame (16) is smaller than the thickness of the friction block (18) and used for blocking and limiting one end, which is in contact with the friction strip, of the friction block (18).
6. The star-delta emergency starting control cabinet according to claim 5, wherein: the inner wall of the sliding groove (17) is connected with a return blocking block (20) in a sliding manner, and return blocking grooves (21) are uniformly distributed on the corresponding side wall of the friction block (18).
7. The star-delta emergency starting control cabinet according to claim 6, wherein: the return blocking block (20) stretches into the return blocking groove (21), and the part of the return blocking block (20) stretching into the return blocking groove (21) is identical to the return blocking groove (21) in shape.
8. The star-delta emergency starting control cabinet according to claim 1, wherein: the other shape of the upper end of the limiting rod (9) is a truncated cone with the cross section gradually reduced from bottom to top.
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| CN202210497720.8A CN114992104B (en) | 2022-05-09 | 2022-05-09 | Star-delta emergency starting control cabinet |
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| CN114992104A (en) | 2022-09-02 |
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Address after: Zhangao Village, Qiaoxia Town, Yongjia County, Wenzhou City, Zhejiang Province 325100 Applicant after: Zhejiang Zhengsen Water Supply Equipment Group Co.,Ltd. Address before: Zhangao Village, Qiaoxia Town, Yongjia County, Wenzhou City, Zhejiang Province 325100 Applicant before: Zhejiang Zhengsen Electric Co.,Ltd. |
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