CN218971326U - Shear pin capable of being locked and unlocked reliably - Google Patents

Abstract

The utility model provides a reliable locking and unlocking shearing pin, aiming to solve the technical problem that the existing shearing pin cannot protect itself when it is in a non-working state. The adopted technical solution is: a reliable locking and unlocking shear pin, including: a hollow pin body, a mandrel coaxial with the pin body and movable in the axial direction, and a magnetically attracted mandrel to move out of the pin body The electromagnet, the spring that pushes the core shaft to move in the pin body when the electromagnet is powered off; the pin body includes: a connecting section, a limiting section, and a dangerous section between the connecting section and the limiting section; the electromagnet When the power is off, the mandrel is pushed by the spring from the connecting section across the dangerous section and enters the limiting section, forming a support for the limiting section of the pin body; when the electromagnet is energized, the mandrel is magnetically attracted and returned The side of the connecting section of the dangerous section. The utility model can be locked in a non-working state to prevent itself from being broken due to non-working reasons such as transportation and impact.

Description

A shear pin that reliably locks and unlocks

technical field

The utility model relates to the technical field of shearing pins, in particular to a shearing pin for reliable locking and unlocking.

Background technique

The shear pin, also known as the break pin, is a key pin that can be sheared beyond a certain torque in mechanical transmission, and is the most widely used safety device for water guide mechanisms. When a dangerous section is processed on the shearing pin, the shearing pin can work normally under the normal operating force; when it exceeds 1.5 times of the normal operating force, the shearing pin breaks at the dangerous section and sends a signal through the signal device to protect The role of other guide vanes.

The existing shearing pins cannot protect themselves in the non-working state, and cannot prevent themselves from being broken due to transportation, impact and other reasons in the non-working state.

Contents of the invention

The purpose of this utility model is to provide a reliable locking and unlocking shear pin, which can be unlocked in the working state and normally play a protective role; it can also be locked in the non-working state to prevent itself from being damaged due to non-working reasons such as transportation and impact. Broken.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A shearing pin for reliable locking and unlocking, comprising: a hollow pin main body, a mandrel coaxial with the pin main body and movable in the axial direction, an electromagnet magnetically attracting the mandrel to make it move out of the pin main body, an electromagnet A spring that pushes the core shaft to move inside the pin body when the power is off; wherein, the pin body includes: a connecting section, a limiting section, and a dangerous section between the connecting section and the limiting section; when the electromagnet is powered off, the Under the push of the spring, the mandrel crosses the dangerous section from the connecting section and enters the limiting section, forming a support for the limiting section of the pin body; when the electromagnet is energized, the mandrel is magnetically attracted and returned to the connecting section of the dangerous section side.

Optionally, the end of the connecting section of the pin body is fixed to the side of the vertical plate, and the other side of the vertical plate is fixed to the horizontal plate; the electromagnet is detachable from the horizontal plate through bolts connect.

Optionally, the vertical plate portion, the horizontal plate portion, and the pin body are of an integrated structure; the vertical plate portion has an installation hole.

Optionally, the shaft of the electromagnet is set as a hollow structure; the mandrel includes: a shaft limited to the hollow electromagnet, and a shaft cap located on the side of the electromagnet facing the pin body; the spring is sleeved on the shaft The rod is located between the electromagnet and the shaft cap; the mandrel is supported by the limiting section of the pin body through the shaft cap.

Optionally, a multi-layer adjusting shim is provided between the electromagnet and the horizontal plate portion.

Optionally, the end of the shaft passes through the electromagnet and is provided with threads; the end of the shaft is fitted with a nut to prevent the mandrel from coming out.

Optionally, the horizontal plate part is detachably installed with a proximity switch for monitoring the position of the shaft; the electromagnet is located between the proximity switch and the vertical plate part.

Optionally, the end of the limiting section of the pin body is sealed to prevent the mandrel from coming out.

The working principle of the utility model is: when it is necessary to make the shearing pin enter the working state, the electromagnet can be energized, and the mandrel shaft penetrating into the pin body is magnetically attracted outward, so that the mandrel leaves the limit section of the pin body and returns to the The dangerous section faces the side of the connecting section; at this time, the shearing pin is unlocked and can perform its protective function normally. When the force on the limiting section is greater than the normal operating force, the shearing pin will break at the dangerous section. When the shearing pin needs to exit the working state, the electromagnet can be powered off, and the mandrel will be inserted from the connecting section of the pin body to the limiting section under the action of the spring to form a support for the limiting section; at this time, the shearing pin The pin is locked, and the force received by the limiting section will be transmitted to the mandrel, thereby preventing the shear pin from breaking due to non-working reasons such as transportation and impact.

It can be seen that the beneficial effects of the utility model are: it can flexibly switch between the working state and the non-working state; it can be unlocked in the working state and normally play a protective role; it can also be locked in the non-working state to prevent It is broken due to non-working reasons such as transportation and impact.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only for the present application For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without creative effort.

Fig. 1 is the structural representation of shearing pin;

Fig. 2 is the connection schematic diagram of vertical board part, horizontal board part, pin main body;

Fig. 3 is a schematic diagram of the working state when the shear pin is unlocked;

Fig. 4 is a schematic diagram of a non-working state when the shear pin is locked.

Reference signs: 1. Pin main body; 2. Mandrel; 3. Electromagnet; 4. Spring; 5. Connecting section; 6. Limiting section; 7. Proximity switch; ; 10, shaft rod; 11, shaft cap; 12, adjusting gasket; 13, nut; 14, mounting plate; 15, limited mechanism.

Detailed ways

In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not restrictive.

In the description of the present utility model, unless otherwise clearly stipulated and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a Detachable connection, or integration; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Embodiments of the present utility model will be described in detail below in conjunction with accompanying drawings 1 to 4 .

The embodiment of the utility model provides a reliable locking and unlocking shear pin. The shearing pin includes: a hollow pin body 1, a mandrel 2 coaxial with the pin body 1 and movable in the axial direction, an electromagnet 3 that magnetically attracts the mandrel 2 to move outside the pin body 1, and an electromagnet 3 The spring 4 that pushes the mandrel 2 to move in the pin body 1 when the power is off. The pin body 1 includes: a connecting section 5 , a limiting section 6 , and a dangerous section between the connecting section 5 and the limiting section 6 . It should be understood that the electromagnet 3 and the spring 4 are located at the end side of the connecting section 5 of the pin main body 1 , and the mandrel 2 enters and leaves the pin main body 1 from the connecting section 5 of the pin main body 1 . When the electromagnet 3 is powered off, the mandrel 2 is pushed by the spring 4 from the connecting section 5 across the dangerous section and enters the limiting section 6 to form a support for the limiting section 6 of the pin main body 1 . When the electromagnet 3 is energized, the mandrel 2 is magnetically attracted and returns to the side of the connecting section 5 of the dangerous section.

The specific embodiment of the utility model is set forth below. When it is necessary to make the shearing pin enter the working state, the electromagnet 3 can be energized, and the mandrel 2 penetrating the pin main body 1 is magnetically attracted outward, so that the mandrel 2 is separated from the pin main body 1. The limiting section 6 returns to the side of the dangerous section facing the connecting section 5; at this time, the shearing pin is unlocked and can perform its protective function normally. When the force received by the limiting section 6 is greater than the normal operating force, the shearing pin Breakage occurs at dangerous sections. When it is necessary to make the shearing pin withdraw from the working state, the electromagnet 3 can be de-energized, and the mandrel 2 will be inserted from the connecting section 5 of the pin main body 1 to the limiting section 6 under the action of the spring 4, and the limiting section 6 is formed. Support; at this time, the shearing pin is locked, and the force received by the limiting section 6 will be transmitted to the mandrel 2, thereby preventing the shearing pin from being broken due to non-working reasons such as transportation and impact. The utility model can flexibly switch between the working state and the non-working state; it can not only be unlocked in the working state, and normally play a protective role; Broken.

In one embodiment disclosed in the present application, the end of the connecting section 5 of the pin body 1 is affixed to the side of the vertical plate 8, and the other side of the vertical plate 8 is fixed to the horizontal plate 9; The electromagnet 3 is detachably connected to the horizontal plate portion 9 through bolts. It should be understood that the riser portion 8 has a pin hole corresponding to the pin body 1 .

Further, the vertical plate portion 8 , the horizontal plate portion 9 , and the pin body 1 are of an integrated structure; the vertical plate portion 8 has a mounting hole. It should be understood that the installation of the shear pin can be completed by attaching the vertical plate portion 8 to the installation plate 14 of the equipment used for the shear pin and screwing on the bolts; Through hole, the limited mechanism 15 of the device has a prefabricated hole for inserting the limiting section 6 of the pin main body 1 .

In one embodiment disclosed in the present application, the shaft portion of the electromagnet 3 is set as a hollow structure; the mandrel 2 includes: a shaft 10 limited to the hollow electromagnet 3, a shaft 10 located on the electromagnet 3 toward the pin body 1 side shaft cap 11; the spring 4 is sleeved on the shaft rod 10 and located between the electromagnet 3 and the shaft cap 11; the mandrel 2 is supported by the shaft cap 11 to the limiting section 6 of the pin body 1. It should be understood that the magnetic force of the electromagnet 3 and the thrust of the spring 4 act directly on the shaft cap 11 of the mandrel 2, and the whole mandrel 2 is driven to move axially by magnetically attracting or pushing the shaft cap 11; The shaft 2 can be set as an integrated structure, all made of iron; it can also be set as an assembled structure, only the shaft cap 11 is made of iron; , Spring 4 cooperates.

Further, a multi-layer adjusting shim 12 is provided between the electromagnet 3 and the horizontal plate portion 9 . It should be understood that the concentricity between the mandrel 2 and the pin main body 1 can be ensured by increasing or decreasing the adjusting washer 12 .

In an embodiment disclosed in the present application, the end of the shaft 10 passes through the electromagnet 3 and is provided with threads; the end of the shaft 10 is fitted with a nut 13 to prevent the mandrel 2 from come out. It should be understood that the nut 13 is made of non-ferromagnetic material.

Further, the horizontal plate portion 9 is detachably installed with a proximity switch 7 for monitoring the position of the shaft 10 ; the electromagnet 3 is located between the proximity switch 7 and the vertical plate portion 8 . It should be understood that when the electromagnet 3 connects the electromagnetically attracting the mandrel 2, the end of the shaft 10 of the mandrel 2 will move to correspond to the proximity switch 7; thus, the position of the shaft 10 can be monitored by the proximity switch 7, Thereby it is determined whether the shear pin is in working condition.

In one embodiment disclosed in the present application, the end of the limiting section 6 of the pin main body 1 is sealed to prevent the mandrel 2 from coming out. It should be understood that the fitting nut 13 at the end of the shaft 10 and the sealing at the end of the limiting section 6 of the pin main body 1 can be selected to prevent the mandrel 2 from moving from the limiting section 6 of the pin main body 1 . 6 ends come out.

Although the specific embodiments of the present utility model have been described above, those skilled in the art should understand that without departing from the principle and essence of the present utility model, various changes or modifications can be made to these embodiments, but these Changes and modifications all fall within the protection scope of the present utility model.

Claims (8)

1. A shearing pin for reliable locking and unlocking, characterized in that, comprising: a hollow pin body (1); and a mandrel (2) coaxial with the pin body (1) and movable in the axial direction; and An electromagnet (3) that magnetically attracts the mandrel (2) to move outward from the pin body (1); and The spring (4) that pushes the mandrel (2) to move into the pin body (1) when the electromagnet (3) is powered off; in, The pin body (1) includes: a connecting section (5), a limiting section (6), a dangerous section between the connecting section (5) and the limiting section (6); When the electromagnet (3) is powered off, the mandrel (2) is pushed by the spring (4) from the connecting section (5) across the dangerous section into the limiting section (6), and the pin body (1) The limiting section (6) constitutes a support; When the electromagnet (3) is energized, the mandrel (2) is magnetically attracted and returns to the side of the connecting section (5) of the dangerous section. 2. The reliable locking and unlocking shear pin according to claim 1, characterized in that: The end of the connecting section (5) of the pin body (1) is fixed to the side of the vertical plate (8), and the other side of the vertical plate (8) is fixed to the horizontal plate (9); The electromagnet (3) is detachably connected to the horizontal plate portion (9) through bolts. 3. The securely locking and unlocking shear pin according to claim 2, characterized in that: The vertical plate part (8), the horizontal plate part (9), and the pin main body (1) are of an integrated structure; the vertical plate part (8) has a mounting hole. 4. The reliable locking and unlocking shear pin according to claim 2, characterized in that: The shaft of the electromagnet (3) is set in a hollow structure; The mandrel (2) includes: a shaft (10) limited to the hollow electromagnet (3), and a shaft cap (11) located on the side of the electromagnet (3) facing the pin body (1); The spring (4) is sleeved on the shaft rod (10) and located between the electromagnet (3) and the shaft cap (11); The mandrel (2) supports the limiting section (6) of the pin main body (1) through the shaft cap (11). 5. The securely locking and unlocking shear pin according to claim 4, characterized in that: A multi-layer adjusting gasket (12) is arranged between the electromagnet (3) and the horizontal plate portion (9). 6. The secure locking and unlocking shear pin of claim 4, characterized in that: The end of the shaft (10) passes through the electromagnet (3) and is threaded; the end of the shaft (10) is fitted with a nut (13) to prevent the mandrel (2) from come out. 7. A secure locking and unlocking shear pin according to claim 6, characterized in that: The horizontal plate (9) is detachably installed with a proximity switch (7) for monitoring the position of the shaft (10); the electromagnet (3) is located between the proximity switch (7) and the vertical plate (8) . 8. The secure locking and unlocking shear pin of claim 4, characterized in that: The end of the limiting section (6) of the pin main body (1) is sealed to prevent the mandrel (2) from coming out.

Images