CN215804485U - Crank pin back-off alarm device - Google Patents

Abstract

The utility model relates to a crank pin tripping alarm device. Crank pin back-off alarm device includes: the conducting rod mounting seat is used for being fixed on the end head of the crank pin; the conducting rod is fixed on the conducting rod mounting seat and used for synchronously moving along with the crank pin; the conductive contact seat is fixedly arranged on the vertical side surface of the crank and is provided with a conductive contact surface; the conducting rod is provided with an overhanging end, and the conducting contact surface is used for blocking the outer side of the overhanging end along the horizontal direction, so that the conducting rod can be contacted with the conducting contact seat and conductively connected when moving outwards horizontally along with the withdrawn crank pin; the crank pin tripping alarm device further comprises an alarm controller, and the conducting rod and the conductive contact seat are used for being connected with corresponding circuits of the alarm controller so as to send out alarm signals when the conducting rod is in contact with the conductive contact seat. The crank pin buckle-releasing alarm device can timely detect the buckle-releasing problem of the crank pin, and is convenient to use.

Description

Crank pin back-off alarm device

Technical Field

The utility model relates to a crank pin tripping alarm device.

Background

At present, most of oil fields are still used as beam pumping units in the development process, the beam pumping units are used as main power equipment for extracting oil, and the beam pumping units move up and down through a horsehead loaded underground load to extract underground crude oil out of the ground. During operation, the crank of the beam pumping unit rotates in a single direction under the drive of the motor, a connecting rod is arranged between the crank and the beam, one end of the connecting rod is hinged with the connecting rod through a crank pin, and the other end of the connecting rod is hinged with the beam.

Because the operating time is longer, the phenomenon of back-off appears easily in the crank pin, if find untimely, the back-off further aggravation, then can lead to the crank to drop and cause the machine accident of turning over. Moreover, with the advance of the digital oil field, the number of field inspection personnel is less and less, so that the work load of the field personnel is not increased, the situation that the crank pin is unscrewed can be found in time, effective treatment is adopted, and the machine overturning accident is avoided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a crank pin tripping alarm device which can detect the tripping problem of a crank pin in time.

The utility model adopts the following technical scheme:

crank pin back-off alarm device includes: the conducting rod mounting seat is used for being fixed on the end head of the crank pin; a conductive rod which moves synchronously with the crank pin is fixed on the conductive rod mounting seat; the crank pin tripping alarm device also comprises a conductive contact seat which is fixedly arranged on the vertical side surface of the crank, and a conductive contact surface is arranged on the conductive contact seat; the conducting rod is provided with an overhanging end, and the conducting contact surface is used for blocking the outer side of the overhanging end along the horizontal direction, so that the conducting rod can be contacted with the conducting contact seat and conductively connected when moving outwards horizontally along with the withdrawn crank pin; the crank pin tripping alarm device further comprises an alarm controller, and the conducting rod and the conductive contact seat are used for being connected with corresponding circuits of the alarm controller so as to send out alarm signals when the conducting rod is in contact with the conductive contact seat.

Has the advantages that: adopt above-mentioned technical scheme, the conducting rod can be fixed on the end of crank pin through the conducting rod mount pad, along with crank pin simultaneous movement, simultaneously, overhang on the conducting rod end can with correspond the electrically conductive contact seat adaptation that sets up for the conducting rod can contact and electrically conductive connection with electrically conductive contact seat when the crank pin that withdraws from outwards moves to the level, realizes switching on of corresponding circuit, and then realizes alarm controller's triggering, sends alarm signal, in time detects the back of crank pin and detains the problem.

Further: the crank pin back-off alarm device further comprises: the contact seat mounting seat is used for fixedly mounting the conductive contact seat on the vertical side surface of the crank; the conductive contact base is detachably fixed on the contact base mounting base.

Has the advantages that: by adopting the technical scheme, the conductive contact seat is convenient to replace, the failure of the conductive contact seat is avoided, the normal alarm is not influenced, and the maintenance is convenient.

Further: the contact base mounting seat is provided with two clamping plates in a guiding manner, the two clamping plates are arranged oppositely, and the surface of each clamping plate is provided with at least two fixing pins; the conductive contact seat comprises a connecting handle, the connecting handle is of a plate-shaped structure, pin holes are formed in the two side plate surfaces of the connecting handle, and fixing pins are inserted into the pin holes to fix the connecting handle; and the contact base mounting seat is also provided with a clamping spring, and the clamping spring is used for providing elastic acting force for the corresponding clamping plate so that the clamping plate clamps the connecting handle of the conductive contact base.

Has the advantages that: by adopting the technical scheme, the conductive contact base can be conveniently fixed and detached without using auxiliary tools, and the operation is convenient.

Further: the connecting handle is a horizontal plate, one side of the horizontal direction of the connecting handle is connected with two contact plates, the two contact plates are mutually spaced and are vertically arranged, and the overhanging ends of the conducting rods are used for being arranged in the space formed by the two contact plates.

Has the advantages that: by adopting the technical scheme, the contact plate on the corresponding side can be conducted with the conductive rod by changing the installation direction of the conductive contact seat, so that the service life is prolonged, and the cost is saved.

Further: the contact base mounting seat is of a frame structure, and the clamping plate is arranged inside the frame structure; the clamping plate is provided with a connecting rod which penetrates out of the frame structure and is connected with an operating handle.

Further: the overhanging end of the conducting rod is provided with a conical conducting head, and the diameter of the large end of the conical conducting head is larger than that of the adjacent part on the conducting rod.

Has the advantages that: by adopting the technical scheme, the reliable connection between the conducting rod and the conducting contact seat is facilitated.

Further: the conducting rod mounting seat is of a sleeve-shaped structure, two conducting rod through holes are formed in the peripheral surface of the conducting rod mounting seat, two ends of the conducting rod penetrate out of the corresponding conducting rod through holes in the radial direction of the conducting rod mounting seat, external threads are arranged on penetrating parts of the two ends of the conducting rod, and the conducting rod mounting seat is fixed on the conducting rod mounting seat through fixing nuts.

Has the advantages that: by adopting the technical scheme, the conductive rod can be conveniently disassembled and adjusted.

Further: be equipped with solar panel on the lateral surface of conducting rod mount pad for provide the electric energy for alarm device.

Further: the crank pin tripping alarm device also comprises a rotation trigger block and a rotation detection device; the rotary trigger block is fixed on the crank pin and protrudes out of the peripheral surface of the crank pin; the rotation detection device is used for being fixed on the vertical side surface of the crank, is provided with a movable contact and is used for triggering the rotation detection device when the rotation triggering block rotates along with the fixing pin; the two sides of the circumferential direction of the rotary trigger block are respectively provided with an adaptive rotary detection device.

Has the advantages that: adopt above-mentioned technical scheme can realize crank pin turned angle's detection, further improve the reliability.

Further: the rotation detection device comprises a pressure rod and a pressure sensor, the pressure rod is arranged on the rotation detection device in a guiding mode, and a return spring is connected onto the pressure rod; the pressure sensor is arranged corresponding to one end of the pressure rod, a gap is reserved between the pressure sensor and the pressure rod, the other end of the pressure rod protrudes out of the rotation detection device to form the movable contact, and the movable contact is used for being pushed by the rotation trigger block to enable the pressure rod to tightly press the pressure sensor to trigger the rotation detection device.

Has the advantages that: adopt above-mentioned technical scheme simple structure, be convenient for make.

Drawings

FIG. 1 is a schematic view showing a state of use of an embodiment 1 of the crank pin trip alarm device according to the present invention;

FIG. 2 is an enlarged view of a portion of the crank pin trip alarm of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

FIG. 4 is an enlarged view of a portion of FIG. 1 at B;

fig. 5 is a schematic structural view of the conductive contact socket of fig. 2;

FIG. 6 is a schematic diagram of the conductive rod of FIG. 2;

fig. 7 is a schematic structural diagram of the conductive rod mounting seat in fig. 2.

The names of the components corresponding to the corresponding reference numerals in the drawings are: 11. a pumping unit base; 12. a walking beam; 13. a crank; 14. a connecting rod; 15. a crank pin; 21. a conductive rod mounting seat; 22. fixing a nut; 31. a conductive rod; 32. a tapered conductive head; 41. rotating the trigger block; 42. a rotation detecting device; 43. a movable contact; 44. a fixing frame; 45. a pressure lever; 46. a pressure sensor; 47. a return spring; 51. a contact base mounting base; 52. mounting an ear plate; 53. a clamping plate; 54. a fixing pin; 55. a connecting rod; 56. an operating handle; 57. a clamping spring; 61. a conductive contact base; 62. a connecting handle; 63. a pin hole; 64. a contact plate; 65. a conductive contact surface; 70. a remote signal transmitting device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

Embodiment 1 of crank pin tripping alarm device of the present invention:

as shown in fig. 1 and 2, the crank pin tripping alarm device is used for being installed on a beam pumping unit, the beam pumping unit comprises a pumping unit base 11, a walking beam 12 and a crank 13 are arranged on the pumping unit base 11, the crank 13 is rotationally matched on the pumping unit base 11, and the walking beam 12 is arranged on the pumping unit base 11 in a swinging mode. A connecting rod 14 is arranged between the walking beam 12 and the crank 13, and two ends of the connecting rod 14 are respectively hinged with the walking beam 12 and the crank 13. The articulation of the connecting rod 14 with the crank 13 is achieved by means of a crank pin 15. The above-described structures are prior art and will not be described in detail herein.

As shown in fig. 2, 3 and 4, the crank pin tripping alarm device comprises a conductive rod mounting seat 21 for mounting on the crank pin 15, a conductive rod 31, a rotation trigger block 41, a contact seat mounting seat 51 for mounting on the crank 13, a conductive contact seat 61, a remote signal transmitting device 70 and a rotation detection device 42.

As shown in fig. 2, 4 and 7, the conductive rod mounting seat 21 is a sleeve-shaped structure, and a solar panel is disposed on the outer side surface of the conductive rod mounting seat and used for providing electric energy for the alarm device to form a solar energy cover. The conductive rod mounting base 21 is fixed on the end of the crank pin 15, and the fixing mode is not limited, and may be welding fixing, screw fixing, rivet fixing, fastening screw fixing, and the like. The outer peripheral surface of the conducting rod mounting seat 21 is provided with two conducting rod through holes, two ends of the conducting rod 31 penetrate out of the corresponding conducting rod through holes along the radial direction of the conducting rod mounting seat 21, and the penetrating parts at the two ends are provided with external threads and fixed on the conducting rod mounting seat 21 through fixing nuts 22 for synchronous movement along with the crank pin 15. As shown in fig. 6, a tapered conductive head 32 is welded and fixed to one end of the conductive rod 31, and the diameter of the large end of the tapered conductive head 32 is larger than that of the adjacent part on the conductive rod 31. The top of the conducting rod mounting seat 21 is provided with an annular inner flange which can be connected with the end of the crank pin 15.

The conductive contact base 61 is fixedly mounted on the vertical side surface of the crank 13 through the contact base mounting base 51, the contact base mounting base 51 is a frame structure, the outer side of the contact base mounting base is welded with the mounting lug plate 52, and the mounting lug plate 52 is used for fixing the contact base mounting base 51 on the crank 13 through a mounting nut. The contact base mount pad 51 is provided with two clamping plates 53 in a guiding manner, the two clamping plates 53 are arranged in opposite directions, four fixing pins 54 are welded and fixed on the surface of each clamping plate 53, and the four fixing pins 54 are arranged in a rectangular manner. The back of the clamping plate 53 is fixed with a connecting rod 55, and the connecting rod 55 penetrates out of the frame structure and is connected with an operating handle 56. The contact base mounting seat 51 is further provided with a clamping spring 57, and the clamping spring 57 is sleeved on the connecting rod 55 and used for providing elastic acting force for the corresponding clamping plate so that the clamping plate 53 clamps the connecting handle 62 of the conductive contact base 61.

As shown in fig. 3 and 5, the connecting handle 62 of the conductive contact base 61 is a plate-shaped structure and is arranged along the horizontal direction, and the two side plate surfaces of the connecting handle are respectively provided with four pin holes 63, and the pin holes 63 correspond to the fixing pins 54 on the clamping plate 53, so that the fixing pins 54 can be inserted to fix the connecting handle 62. One side that contact base mount pad 51 is close to conducting rod 31 is equipped with and dodges the mouth, supplies the connection handle 62 to stretch out along the horizontal direction, and the side of stretching out of connection handle 62 is connected with two contact plates 64, and two contact plates 64 are the mutual interval, all along vertical arrangement, the one end that conducting rod 31 was equipped with toper conducting head 32 is the overhang end, sets up in the interval that two contact plates 64 formed. The inner side surface of the outer contact plate 64 forms a conductive contact surface 65, the conductive contact surface 65 is blocked outside the overhanging end of the conductive rod 31 along the horizontal direction in use, and the conductive rod 31 can be contacted and conductively connected with the conductive contact seat 61 when moving outwards horizontally along with the withdrawn crank pin 15. The conductive rod 31 and the conductive contact base 61 are equivalent to a switch, and when the conductive rod and the conductive contact base are contacted, the switch is closed, and the corresponding circuit is conducted. Of course, in order to avoid the conductive rod 31 directly conducting with the conductive contact base 61 through the conductive rod mounting base 21, the crank pin 15, the crank 13 and the contact base mounting base 51, an insulating member may be provided in the conductive path, for example, the contact base mounting base 51 may be made of an insulating material.

The crank pin tripping alarm device further comprises an alarm controller, the alarm controller is arranged in a corresponding shell, not shown in the figure, and the conductive rod 31 and the conductive contact seat 61 are connected with the alarm controller and used for sending out an alarm signal when the conductive rod 31 is in contact with the conductive contact seat 61.

When conductive contact seat 61 needs to be replaced, operating handle 56 is pulled, operating handle 56 drives clamping plate 53 to move through connecting rod 55, fixing pin 54 on clamping plate 53 is separated from pin control on connecting rod 62, conductive contact seat 61 can be separated from contact seat mounting seat 51, and conductive contact seat 61 is conveniently replaced.

During the use, after the crank pin 15 is fixed in place on crank 13, on the tip of crank pin 15 is installed to conducting rod mount pad 21, be connected to conducting rod mount pad 21 conducting rod 31, when crank pin 15 will drop from crank 13, crank pin 15 will drive conducting rod mount pad 21 and conducting rod 31 and remove, the end that overhangs on the conducting rod 31 contacts with the conductive contact surface 65 of conductive contact seat 61, switch on alarm controller's corresponding part, alarm controller passes the signal to remote signal emitter 70, remote signal emitter 70 will far pass alarm signal to the central control room, thereby can in time discover the problem and solve, can effectually avoid the turn over machine accident because of crank pin 15 back-off causes. The remote signal transmitting device 70 is fixedly installed on the vertical side of the crank 13 through screws for realizing remote transmission of signals.

In order to find out the rotation of the crank pin 15 in time and monitor the falling of the crank pin 15 more effectively, the crank pin tripping alarm device further comprises a rotation triggering block 41 and a rotation detecting device 42. Referring to fig. 2 and 4, the rotation triggering block 41 is provided with two blocks, symmetrically welded to the crank pin 15 and protruding from the outer circumferential surface of the crank pin 15, and the rotation detecting means 42 is fixed to the vertical side surface of the crank 13 and provided with a movable contact 43 for triggering the rotation detecting means 42 when the rotation triggering block 41 rotates with the fixing pin 54. The two sides of the rotation trigger block 41 in the circumferential direction are respectively provided with an adaptive rotation detection device 42. Specifically, the rotation detection device 42 includes a fixed frame 44, a pressure lever 45 is guided and assembled on the fixed frame 44, one end of the pressure lever 45 is correspondingly provided with a pressure sensor 46, the pressure sensor 46 is fixed on the rotation detection device 42 and has a gap with the pressure lever 45, and the type of the pressure sensor 46 may be CYYZ 11. The other end of the pressure lever 45 protrudes out of the rotation detection device 42 to form the movable contact 43, and the movable contact is pushed by the rotation triggering block 41 to enable the pressure lever 45 to press the pressure sensor 46 to trigger the rotation detection device 42. The pressure lever 45 is sleeved with a return spring 47, and elastic acting force is applied to the pressure lever 45, so that the movable contact 43 formed by the pressure lever 45 has a tendency of protruding outwards.

When the crank pin 15 rotates, the crank pin 15 drives the rotating trigger block 41 to rotate, the rotating trigger block 41 is separated from the movable contact 43 on the corresponding side, and the corresponding pressure rod 45 is separated from the corresponding pressure sensor 46; when the pin continues to rotate, the rotating trigger block 41 presses down the movable contact 43 on the other side of the pin, the corresponding pressure rod 45 is made to contact the pressure sensor 46 on the side, the pressure sensor 46 transmits a signal to the remote signal transmitting device 70, and the remote signal transmitting device 70 transmits an alarm signal to the central control room, so that the fact that the crank pin 15 exceeds a limited rotation value is found, problems are found in time, and accidents are effectively prevented. The contact plate 64 of the conductive contact base 61 has a width that can accommodate the swing of the conductive rod 31.

Embodiment 2 of crank pin unthreading alarm device of the present invention:

the present embodiment is different from embodiment 1 in that in embodiment 1, the conductive contact base 61 is fixed on the crank 13 through the contact base mounting base 51, whereas in the present embodiment, the conductive contact base 61 is directly fixed on the crank 13.

Embodiment 3 of the crank pin unthreading alarm device of the present invention:

the difference between the present embodiment and embodiment 1 is that in embodiment 1, the conductive contact base 61 includes two contact plates 64 to form two conductive contact surfaces 65, whereas in the present embodiment, the conductive contact base 61 includes only one contact plate 64 and only one conductive contact surface 65.

Embodiment 4 of the crank pin unthreading alarm device of the present invention:

the present embodiment is different from embodiment 1 in that in embodiment 1, the conductive contact base 61 is detachably fixed by clamping two clamping plates 53, and in this embodiment, the conductive contact base 61 is detachably fixed on the crank 13 by a screw.

Embodiment 5 of crank pin unthreading alarm device of the present invention:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the conductive rod mounting seat 21 is a sleeve-shaped structure, whereas in this embodiment, the conductive mounting seat is a mounting plate, and is fixed on the end face of the crank pin 15 by a screw, and the conductive rod 31 is fixed on the mounting plate by welding.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims (10)

1. Crank pin back-off alarm device, its characterized in that includes: the conductive rod mounting seat (21) is used for being fixed on the end of the crank pin (15), and a conductive rod (31) which moves synchronously with the crank pin (15) is fixed on the conductive rod mounting seat (21); the crank pin tripping alarm device also comprises a conductive contact base (61) fixedly arranged on the vertical side surface of the crank (13), and a conductive contact surface (65) is arranged on the conductive contact base (61); the conducting rod (31) is provided with an overhanging end, and a conducting contact surface (65) is used for blocking the outer side of the overhanging end along the horizontal direction, so that the conducting rod (31) can be contacted and conductively connected with the conducting contact seat (61) when moving outwards horizontally along with the withdrawn crank pin (15); the crank pin tripping alarm device further comprises an alarm controller, and the conducting rod (31) and the conducting contact seat (61) are used for being connected with corresponding circuits of the alarm controller so as to send out alarm signals when the conducting rod (31) is in contact with the conducting contact seat (61).

2. The crank pin trip alarm device of claim 1, further comprising: the contact seat mounting seat (51) is used for fixedly mounting the conductive contact seat (61) on the vertical side surface of the crank (13); the conductive contact base (61) is detachably fixed on the contact base mounting base (51).

3. The crank pin tripping alarm device according to claim 2, wherein the contact base mounting seat (51) is provided with two clamping plates (53) in a guiding manner, the two clamping plates (53) are arranged oppositely, and the plate surface of each clamping plate (53) is provided with at least two fixing pins (54); the conductive contact seat (61) comprises a connecting handle (62), the connecting handle (62) is of a plate-shaped structure, pin holes (63) are formed in the two side plate surfaces of the connecting handle, and the pin holes (63) are used for inserting fixing pins (54) to fix the connecting handle (62); the contact base mounting seat (51) is further provided with a clamping spring (57), and the clamping spring (57) is used for providing elastic acting force for the corresponding clamping plate (53) so that the clamping plate (53) can clamp the connecting handle (62) of the conductive contact base (61).

4. The crank pin tripping alarm device according to claim 3, wherein the connecting handle (62) is a horizontal plate, two contact plates (64) are connected to one side of the horizontal plate, the two contact plates (64) are vertically arranged in a spaced manner, and the overhanging end of the conductive rod (31) is used for being arranged in the space formed by the two contact plates (64).

5. The crank pin tripping alarm device according to claim 3 or 4, wherein the contact base mounting seat (51) is a frame structure, and the clamping plate (53) is arranged inside the frame structure; the clamping plate (53) is provided with a connecting rod (55), and the connecting rod (55) penetrates out of the frame structure and is connected with an operating handle (56).

6. Crank pin tripping alarm device according to claim 1 or 2 or 3 or 4, characterised in that the overhanging end of the conducting rod (31) is provided with a conical conducting head (32), the diameter of the large end of the conical conducting head (32) being larger than the diameter of the adjacent part on the conducting rod (31).

7. The crank pin tripping alarm device according to claim 1, 2, 3 or 4, wherein the conductive rod mounting seat (21) is of a sleeve-shaped structure, two conductive rod through holes are formed in the outer peripheral surface of the conductive rod mounting seat, two ends of the conductive rod (31) penetrate through the corresponding conductive rod through holes along the radial direction of the conductive rod mounting seat (21), and the penetrating parts of the two ends are provided with external threads and fixed on the conductive rod mounting seat (21) through fixing nuts (22).

8. The crank pin tripping alarm device according to claim 1, 2, 3 or 4, wherein a solar panel is arranged on the outer side surface of the conductive rod mounting seat (21) and used for providing electric energy for the alarm device.

9. Crank pin dropout alarm according to claim 1 or 2 or 3 or 4, characterized in that the crank pin dropout alarm further comprises a rotation trigger block (41) and a rotation detection means (42); the rotary trigger block (41) is fixed on the crank pin (15) and protrudes out of the outer peripheral surface of the crank pin (15); the rotation detection device (42) is used for being fixed on the vertical side surface of the crank (13), a movable contact (43) is arranged on the rotation detection device, and the rotation detection device (42) is triggered when the rotation trigger block (41) rotates along with the fixed pin (54); the two sides of the circumferential direction of the rotary trigger block (41) are respectively provided with an adaptive rotary detection device (42).

10. The crank pin tripping alarm device according to claim 9, wherein the rotation detection device (42) comprises a pressure lever (45) and a pressure sensor (46), the pressure lever (45) is guided on the rotation detection device (42), and a return spring (47) is connected to the pressure lever (45); the pressure sensor (46) is arranged corresponding to one end of the pressure rod (45), an interval is reserved between the pressure sensor and the pressure rod (45), the other end of the pressure rod (45) protrudes out of the rotation detection device (42) to form the movable contact (43), and the movable contact is used for being pushed by the rotation trigger block (41) to enable the pressure rod (45) to press the pressure sensor (46) to trigger the rotation detection device (42).

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