Portable manual meshing rocking handle

Abstract

The utility model discloses a manual meshing rocking handle convenient to use, which relates to the technical field of steam turbines and comprises a clamping head, a clamping groove, a handle and a handle. One end of the connecting part is connected with the other end of the clamping head, and the other end of the connecting part extends in the direction opposite to the clamping head and the direction away from the axis of the clamping head; one end of the handheld part is connected with the other end of the connecting part; and one end of the foot rest lever is connected with the other end of the handheld part. When the clamping groove of the clamping head is clamped with the convex hexagonal cylinder, the convex hexagonal cylinder is completely wrapped by the clamping groove, so that the abrasion of the convex hexagonal cylinder at the tail part of the turning motor is reduced. According to the pedal rod, a screw rod, a screw and a nut which are difficult to unscrew manually can be screwed through pedal force, then the screw rod, the screw and the nut are unscrewed manually, and the difficulty of unscrewing the screw rod, the screw and the nut is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to a portable manual meshing crank. Background Art

[0002] The barring gear is one of the important equipment of the steam turbine in the power plant. The barring gear is mainly used to continuously rotate the large shaft of the steam turbine generator set before starting and after stopping to prevent the large shaft of the steam turbine generator set from bending. The quality of the barring gear directly affects the safe start and stop operation of the steam turbine.

[0003] The barring gear of the power plant steam turbine includes a manual operating mechanism, a barring ammeter, a tachometer, a control box, etc. In design, it can be operated remotely (on the DCS operator station) or locally. When the steam turbine speed drops to zero speed, it can be electrically barred or manually barred. The barring gear is of automatic meshing type and can rotate the rotor of the steam turbine generator set from a stationary state. The barring speed is 3.35 r / min. Due to the failure of the automatic meshing device of the power plant barring gear, the steam turbine barring has been put into operation by using a movable wrench for manual meshing.

[0004] Because the movable wrench has been used for a long time to put the barring gear into operation, the convex hexagonal column of the meshing device at the tail of the barring motor is unevenly stressed and severely worn, affecting the normal operation of the steam turbine barring.

[0005] The movable wrench is a traditional tool for screwing screws and nuts, but the screws and nuts are also easily worn by the movable wrench, and some screws and nuts are not easily unscrewed because they are screwed too tightly. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a portable manual meshing crank, which not only reduces the wear of the convex hexagonal column, but also makes the meshing of the barring gear simple and fast, and ensures the safe start and stop operation of the steam turbine.

[0007] To solve the above technical problems, the utility model adopts the following technical solutions:

[0008] One aspect of the embodiment of the utility model provides a portable manual meshing crank, the manual meshing crank includes: a chuck, one end of the chuck is provided with a clamping groove; a connecting part, one end of the connecting part is connected to the other end of the chuck, and the other end of the connecting part extends in a direction opposite to the chuck and away from the axis of the chuck; a handgrip part, one end of the handgrip part is connected to the other end of the connecting part; a foot pedal rod, one end of the foot pedal rod is connected to the other end of the handgrip part.

[0009] In some embodiments, the clamping groove is in a concave hexagonal shape.

[0010] In some embodiments, the connecting portion includes a first connecting rod and a second connecting rod. The other end of the chuck is vertically connected to one end of the first connecting rod. One end of the first connecting rod is connected to one end of the second connecting rod. The other end of the second connecting rod extends in a direction opposite to that of the chuck. One end of the hand-held portion is connected to the other end of the second connecting rod.

[0011] In some embodiments, the second connecting rod is arc-shaped.

[0012] In some embodiments, the hand-held portion includes a handle housing, a bearing, and a third connecting rod. The handle housing is sleeved outside the bearing. The third connecting rod passes through the inside of the bearing. One end of the third connecting rod is connected to the other end of the connecting portion. The other end of the third connecting rod is connected to one end of the foot pedal rod.

[0013] In some embodiments, the hand-held portion further includes a first limiting block and a second limiting block. The first limiting block and the second limiting block are respectively sleeved at both ends of the third connecting rod to prevent the handle housing and the bearing from detaching from the third connecting rod.

[0014] In some embodiments, anti-slip patterns are provided on the handle housing.

[0015] A portable manual meshing crank according to an embodiment of the present invention has at least the following beneficial effects: It has a delicate and reliable structure, can be reused, reduces the wear of the convex hexagonal column at the tail of the barring motor, extends the service life, makes the commissioning of the barring meshing device simple and fast, shortens the commissioning time of the barring (from 3 - 5 minutes to 1 minute), thereby ensuring the safe start-up and shutdown of the steam turbine. This application can be used for on-site operation of barring meshing devices of the same type of steam turbines. This application can also be used for screwing screws, bolts, and nuts, etc. The foot pedal rod designed in this application enables screws, bolts, and nuts that are difficult to loosen manually to be loosened by foot force first and then manually, reducing the difficulty of loosening screws, bolts, and nuts.

[0016] It should be understood that the above general description and the following detailed description are exemplary and do not limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1Schematic structural diagram of the first perspective of the manually engaged crank according to an embodiment;

[0019] Figure 2 Schematic structural diagram of the second perspective of the manually engaged crank according to an embodiment;

[0020] Figure 3 Schematic cross-sectional structural diagram of the hand-held part according to an embodiment.

[0021] Explanation of the reference numerals is as follows: 1. Chuck; 2. Foot lever; 3. First connecting rod; 4. Second connecting rod; 5. Handle housing; 6. Bearing; 7. Third connecting rod; 8. First limit block; 9. Second limit block; 10. Axis; 11. Card slot. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "one end", "the other end", "inside", "outside", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0024] The terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "communicate", "install", "connect", and "couple" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repeated description will be omitted.

[0027] The technical solutions of the embodiments of the present application will be briefly described below:

[0028] According to some embodiments, as Figures 1 to 2 shown, the present application provides a portable manual engagement crank, and the manual engagement crank includes:

[0029] A chuck 1, one end of the chuck 1 is provided with a clamping groove 11;

[0030] A connecting portion, one end of the connecting portion is connected to the other end of the chuck 1, and the other end of the connecting portion extends in a direction opposite to the chuck 1 and away from the axis 10 of the chuck 1;

[0031] A hand-held portion, one end of the hand-held portion is connected to the other end of the connecting portion;

[0032] A foot pedal rod 2, one end of the foot pedal rod 2 is connected to the other end of the hand-held portion.

[0033] Based on the working principle of the above embodiments, when the present application is used for a barring gear device, the clamping groove 11 is used to be clamped with the convex hexagonal column body of the meshing device at the tail of the barring motor. After the clamping groove 11 is clamped with the convex hexagonal column body, manual barring is performed through the hand-held portion. Conventionally, a movable wrench is used to operate the barring gear, and the convex hexagonal column body of the meshing device at the tail of the barring motor is unevenly stressed and severely worn, affecting the normal operation of the steam turbine barring gear. When the clamping groove 11 of the chuck 1 of the present application is clamped with the convex hexagonal column body, the clamping groove 11 completely wraps the convex hexagonal column body, reducing the wear of the convex hexagonal column body at the tail of the barring motor. The structure of the present application is delicate and reliable, can be reused, reduces the wear of the convex hexagonal column body at the tail of the barring motor, extends the service life, makes the operation of the meshing device of the barring gear simple and fast, shortens the operation time of the barring gear (from 3 to 5 minutes to 1 minute), and thus ensures the safe start-up and shutdown of the steam turbine.

[0034] When screwing the screw rod, screw, and nut in this application, the card slot 11 is used to engage with the screw rod, screw, or nut. After the card slot 11 is engaged with the screw rod, screw, or nut, the screw rod, screw, or nut can be manually loosened or tightened through the hand-held part. When loosening the screw rod, screw, or nut in a large device, if it is difficult to manually loosen the screw rod, screw, and nut, the foot can be stepped on the foot lever 2 first to loosen the screw rod, screw, or nut, and then the screw rod, screw, and nut can be manually loosened through the hand-held part, reducing the difficulty of loosening the screw rod, screw, and nut.

[0035] The following is further elaborated in detail in conjunction with the attached Figures 1 to 3 drawings of this specification for the preferred embodiments of the present disclosure.

[0036] According to some embodiments, as Figure 2 shown, the card slot 11 is in a concave hexagonal shape.

[0037] Based on the above embodiments, the shape of the card slot 11 can be set according to the shape of the object to be used. The shape of the card slot 11 can be a concave triangular shape, a concave quadrilateral shape, a concave pentagonal shape, etc., which are not limited in this application. When this application is used for a barring gear device, the card slot 11 adopts a concave hexagonal shape.

[0038] According to some embodiments, as Figures 1 to 2 shown, the connecting part includes a first connecting rod 3 and a second connecting rod 4. The other end of the chuck 1 is vertically connected to one end of the first connecting rod 3. The other end of the first connecting rod 3 is connected to one end of the second connecting rod 4. The other end of the second connecting rod 4 extends in the direction opposite to the chuck 1. One end of the hand-held part is connected to the other end of the second connecting rod 4.

[0039] Based on the above embodiments, the first connecting rod 3 makes the hand-held part away from the axis 10 of the chuck 1, so as to facilitate manually rotating the hand-held part, and manual rotation is easier than manual twisting. The second connecting rod 4 makes the hand-held part extend in the direction opposite to the chuck 1, so as to facilitate the overall use.

[0040] According to some embodiments, as Figures 1 to 2 shown, the second connecting rod 4 is in an arc shape.

[0041] Based on the above embodiments, in some other embodiments, it can also be other shapes, which are not limited in this application.

[0042] According to some embodiments, as Figures 1 to 3As shown, the hand-held part includes a handle housing 5, a bearing 6, and a third connecting rod 7. The handle housing 5 is sleeved outside the bearing 6, and the third connecting rod 7 passes through the inside of the bearing 6. One end of the third connecting rod 7 is connected to the other end of the connecting part, and the other end of the third connecting rod 7 is connected to one end of the foot pedal rod 2.

[0043] Based on the above embodiments, the handle housing 5 is rotatably connected to the third connecting rod 7 through the bearing 6, and the third connecting rod 7 is connected to the connecting part. During use, the handle housing 5 is held by hand and rotated. When rotated to different positions, the handle and the third connecting rod 7 rotate relative to each other, and there is no need for relative rotation between the hand and the handle housing 5, which improves the convenience of manual rotation.

[0044] According to some embodiments, as Figures 1 to 3 shown, the hand-held part further includes a first limiting block 8 and a second limiting block 9. The first limiting block 8 and the second limiting block 9 are respectively sleeved at both ends of the third connecting rod 7 to prevent the handle housing 5 and the bearing 6 from detaching from the third connecting rod 7.

[0045] According to some embodiments, as Figures 1 to 2 shown, the handle housing 5 is provided with anti-slip patterns, which is convenient for manually gripping the handle housing 5 and preventing slipping.

[0046] In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0047] Although the present disclosure has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present disclosure can be embodied in many forms without departing from the spirit or essence of the present application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be broadly construed within the spirit and scope defined by the appended claims. Therefore, all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A convenient manual engagement crank, characterized in that: The manually engaged crank handle comprises: A clamping head, one end of which is provided with a clamping slot; A connecting portion, one end of which is connected to the other end of the chuck, and the other end of which extends in a direction opposite to the chuck and away from the axis of the chuck; A grip portion, one end of which is connected to the other end of the connection portion; A pedal rod, one end of which is connected to the other end of the hand grip.

2. The manual engagement crank handle according to claim 1, characterized in that: The card slot is in a concave hexagonal shape.

3. The manual engagement crank handle according to claim 1, characterized in that: The connecting part includes a first connecting rod and a second connecting rod, the other end of the clamp is vertically connected to one end of the first connecting rod, the other end of the first connecting rod is connected to one end of the second connecting rod, the other end of the second connecting rod extends in the opposite direction of the clamp, and one end of the hand grip is connected to the other end of the second connecting rod.

4. The manual engagement crank handle according to claim 3, characterized in that: The second connecting rod is in an arc shape.

5. The manual engagement crank handle according to claim 1, characterized in that: The hand grip portion includes a handle shell, a bearing and a third connecting rod, the handle shell is sleeved on the outer side of the bearing, the third connecting rod is passed through the inner side of the bearing, one end of the third connecting rod is connected to the other end of the connecting portion, and the other end of the third connecting rod is connected to one end of the pedal rod.

6. The manual engagement crank handle according to claim 5, characterized in that: The hand grip portion further includes a first limit block and a second limit block, wherein the first limit block and the second limit block are respectively sleeved on two ends of the third connecting rod to prevent the handle housing and the bearing from being separated from the third connecting rod.

7. The manual engagement crank handle according to claim 5, characterized in that: The handle shell is provided with anti-slip patterns.

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