CN218971326U - Shear pin capable of being locked and unlocked reliably - Google Patents
Shear pin capable of being locked and unlocked reliably Download PDFInfo
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- CN218971326U CN218971326U CN202223202576.5U CN202223202576U CN218971326U CN 218971326 U CN218971326 U CN 218971326U CN 202223202576 U CN202223202576 U CN 202223202576U CN 218971326 U CN218971326 U CN 218971326U
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- 238000012544 monitoring process Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a shear pin capable of being locked and unlocked reliably, and aims to solve the technical problem that the existing shear pin cannot protect the existing shear pin when the existing shear pin is in a non-working state. The adopted technical scheme is as follows: a shear pin for secure locking and unlocking, comprising: the pin comprises a hollow pin body, a mandrel which is coaxial with the pin body and can move along the axial direction, an electromagnet which magnetically attracts the mandrel to enable the mandrel to move towards the outside of the pin body, and a spring which pushes the mandrel to move in the pin body when the electromagnet is powered off; the pin body includes: the connecting section, the limiting section and a dangerous section between the connecting section and the limiting section; when the electromagnet is powered off, the mandrel passes through the dangerous section from the connecting section to enter the limiting section under the pushing of the spring, and the limiting section of the pin main body is supported; when the electromagnet is electrified, the mandrel is magnetically attracted to retract to one side of the connecting section of the dangerous section. The utility model can be locked in a non-working state to prevent the self from breaking due to non-working reasons such as transportation, impact and the like.
Description
Technical Field
The utility model relates to the technical field of shear pins, in particular to a shear pin capable of being locked and unlocked reliably.
Background
The shear pin, also called the break pin, is a key pin which can be sheared by exceeding a certain moment in mechanical transmission and is the most used safety device of the water guide mechanism. The shear pin is processed to have a dangerous section, and the shear pin can work normally under the action of normal operating force; when the normal operating force is more than 1.5 times of the normal operating force, the shear pin breaks at the dangerous section and sends out a signal through the signal device, so that the function of protecting other guide vanes is achieved.
The existing shear pin cannot protect the shear pin in a non-working state, and cannot prevent the shear pin from being broken due to transportation, impact and other reasons in the non-working state.
Disclosure of Invention
The utility model aims to provide a shear pin capable of being reliably locked and unlocked, which can be unlocked in a working state and normally plays a role in protection; but also can be locked in a non-working state to prevent the self from breaking due to non-working reasons such as transportation, impact and the like.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a shear pin for secure locking and unlocking, comprising: the pin comprises a hollow pin body, a mandrel which is coaxial with the pin body and can move along the axial direction, an electromagnet which magnetically attracts the mandrel to enable the mandrel to move towards the outside of the pin body, and a spring which pushes the mandrel to move in the pin body when the electromagnet is powered off; wherein the pin body comprises: the connecting section, the limiting section and a dangerous section between the connecting section and the limiting section; when the electromagnet is powered off, the mandrel passes through the dangerous section from the connecting section to enter the limiting section under the pushing of the spring, and the limiting section of the pin main body is supported; when the electromagnet is electrified, the mandrel is magnetically attracted to retract to one side of the connecting section of the dangerous section.
Optionally, the end of the connecting section of the pin main body is fixedly connected to the side surface of the vertical plate part, and the other side surface of the vertical plate part is fixedly connected with a transverse plate part; the electromagnet is detachably connected with the transverse plate part through a bolt.
Optionally, the vertical plate part, the transverse plate part and the pin main body are of an integrated structure; the riser portion has a mounting hole.
Optionally, the shaft part of the electromagnet is arranged to be a hollow structure; the mandrel comprises: the shaft cap is limited on the shaft rod of the hollow electromagnet and positioned on one side of the electromagnet facing the pin main body; the spring is sleeved on the shaft rod and is positioned between the electromagnet and the shaft cap; the mandrel is supported by the limiting section of the pin main body through the shaft cap.
Optionally, a plurality of layers of adjusting gaskets are arranged between the electromagnet and the transverse plate part.
Optionally, the end part of the shaft rod penetrates out of the electromagnet and is provided with threads; the end of the shaft is fitted with a nut to prevent the mandrel from backing out.
Optionally, the cross plate part is detachably provided with a proximity switch for monitoring the position of the shaft lever; the electromagnet is positioned between the proximity switch and the riser portion.
Optionally, the end of the limit section of the pin body is sealed to prevent the mandrel from falling out.
The working principle of the utility model is as follows: when the shear pin is required to enter a working state, the electromagnet can be electrified to magnetically attract the core shaft penetrating into the pin main body outwards, so that the core shaft leaves the limiting section of the pin main body and returns to one side of the dangerous section facing the connecting section; at this time, the shear pin is unlocked, the protection function of the shear pin can be normally fulfilled, and when the force applied to the limiting section is larger than the normal operation force, the shear pin can break at the dangerous section. When the shear pin is required to be withdrawn from the working state, the electromagnet can be powered off, and the mandrel can be inserted into the limiting section from the connecting section of the pin main body under the action of the spring so as to support the limiting section; at this time, the shear pin is locked, and the force received by the limiting section is transmitted to the mandrel, so that the shear pin is prevented from being broken due to non-working reasons such as transportation and impact.
Therefore, the utility model has the beneficial effects that: the device can be flexibly switched between an operating state and a non-operating state; not only can be unlocked in the working state, but also can normally play a role in protection; but also can be locked in a non-working state to prevent the self from breaking due to non-working reasons such as transportation, impact and the like.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a shear pin;
FIG. 2 is a schematic view of the connection of the riser, cross plate, and pin bodies;
FIG. 3 is a schematic illustration of the shear pin in an operative condition when unlocked;
FIG. 4 is a schematic view of the shear pin in an inactive state when locked.
Reference numerals: 1. a pin body; 2. a mandrel; 3. an electromagnet; 4. a spring; 5. a connection section; 6. a limiting section; 7. a proximity switch; 8. a riser portion; 9. a cross plate portion; 10. a shaft lever; 11. a shaft cap; 12. adjusting the gasket; 13. a screw cap; 14. a mounting plate; 15. is limited by a limiting mechanism.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Embodiments of the present utility model will be described in detail with reference to fig. 1 to 4.
The embodiment of the utility model provides a shear pin capable of reliably locking and unlocking. The shear pin includes: the pin comprises a hollow pin body 1, a mandrel 2 which is coaxial with the pin body 1 and can move along the axial direction, an electromagnet 3 which magnetically attracts the mandrel 2 to move outside the pin body 1, and a spring 4 which pushes the mandrel 2 to move inside the pin body 1 when the electromagnet 3 is powered off. The pin body 1 includes: the connecting section 5, the limiting section 6, and dangerous sections between the connecting section 5 and the limiting section 6. It will be appreciated that the electromagnet 3, the spring 4 are located on the end side of the connecting section 5 of the pin body 1, the spindle 2 passing in and out of the pin body 1 from the connecting section 5 of the pin body 1. When the electromagnet 3 is powered off, the mandrel 2 passes through the dangerous section from the connecting section 5 to enter the limiting section 6 under the pushing of the spring 4, and the limiting section 6 of the pin main body 1 is supported. When the electromagnet 3 is electrified, the mandrel 2 is attracted by magnetism and retreats to one side of the connecting section 5 of the dangerous section.
The following describes a specific embodiment of the utility model, when the shear pin needs to be put into a working state, the electromagnet 3 can be electrified to magnetically attract the mandrel 2 penetrating into the pin main body 1 outwards, so that the mandrel 2 leaves the limit section 6 of the pin main body 1 and returns to the side of the dangerous section facing the connecting section 5; at this time, the shear pin is unlocked, and the protection function thereof can be normally fulfilled, and when the force applied to the limit section 6 is greater than the normal operation force, the shear pin is broken at the dangerous section. When the shear pin is required to be withdrawn from the working state, the electromagnet 3 can be powered off, and the mandrel 2 can 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, so that the limiting section 6 is supported; at this time, the shear pin is locked, and the force received by the limiting section 6 is transmitted to the mandrel 2, so that the shear pin is prevented 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; not only can be unlocked in the working state, but also can normally play a role in protection; but also can be locked in a non-working state to prevent the self from breaking due to non-working reasons such as transportation, impact and the like.
In one embodiment disclosed in the application, the end part of the connecting section 5 of the pin main body 1 is fixedly connected with the side surface of the vertical plate part 8, and the other side surface of the vertical plate part 8 is fixedly connected with the transverse plate part 9; the electromagnet 3 is detachably connected with the transverse plate part 9 through bolts. It should be understood that the riser portion 8 has a pin hole corresponding to the pin main body 1.
Further, the vertical plate part 8, the transverse plate part 9 and the pin main body 1 are of an integral structure; the riser portion 8 has mounting holes. It will be appreciated that the mounting of the shear pin can be accomplished by attaching the riser portion 8 to the mounting plate 14 of the shear pin's equipment and screwing the bolt; the mounting plate 14 of the use device has a through hole through which the pin body 1 passes, and the limited mechanism 15 of the use device has a preformed hole into which the limited section 6 of the pin body 1 is inserted.
In one embodiment disclosed in the present application, the shaft portion of the electromagnet 3 is provided in a hollow structure; the mandrel 2 comprises: a shaft rod 10 limited on the hollow electromagnet 3, and a shaft cap 11 positioned on one side of the electromagnet 3 facing the pin main body 1; the spring 4 is sleeved on the shaft lever 10 and is positioned between the electromagnet 3 and the shaft cap 11; the spindle 2 forms a support for the limit section 6 of the pin body 1 via the spindle cap 11. It should be understood that the magnetic force of the electromagnet 3 and the thrust of the spring 4 directly act 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 mandrel 2 can be arranged into an integral structure and is made of iron; or may be provided in an assembled structure, with only the shaft cap 11 being made of iron; the diameter of the shaft cap 11 is larger than the hollow inner diameter of the electromagnet 3 so as to be matched with the electromagnet 3 and the spring 4.
Further, a plurality of layers of adjusting gaskets 12 are arranged between the electromagnet 3 and the transverse plate part 9. It will be appreciated that by increasing or decreasing the adjustment shim 12, the coaxiality of the spindle 2 with the pin body 1 can be ensured.
In one embodiment disclosed in the present application, the end of the shaft 10 protrudes from the electromagnet 3 and is provided with a thread; the end of the shaft 10 is fitted with a nut 13 to prevent the spindle 2 from backing out. It should be appreciated that the nut 13 is made of a non-ferromagnetic material.
Further, the cross plate part 9 is detachably provided with a proximity switch 7 for monitoring the position of the shaft lever 10; the electromagnet 3 is located between the proximity switch 7 and the riser 8. It will be appreciated that when the electromagnet 3 is switched on the electromagnet suction spindle 2, the end of the shaft 10 of the spindle 2 will move into correspondence with the proximity switch 7; in this way, the position of the shaft 10 can be monitored by the proximity switch 7 to determine if the shear pin is in operation.
In one embodiment disclosed herein, the stop section 6 of the pin body 1 is end-capped to prevent the mandrel 2 from backing out. It will be appreciated that the fitting nut 13 at the end of the shaft 10 seals against the end of the stop section 6 of the pin body 1, and that a selection of one of these implementations prevents the spindle 2 from backing out of the end of the stop section 6 of the pin body 1.
While particular embodiments of the present utility model have been described above, it will be understood by those skilled in the art that various changes and modifications may be made to these embodiments without departing from the spirit and scope of the utility model.
Claims (8)
1. A shear pin for secure locking and unlocking, 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) for magnetically attracting the core shaft (2) to move the core shaft out of the pin main body (1); and
A spring (4) which pushes the mandrel (2) to move into the pin main body (1) when the electromagnet (3) is powered off;
wherein,,
the pin body (1) comprises: the connecting section (5), the limiting section (6), and dangerous sections between the connecting section (5) and the limiting section (6);
when the electromagnet (3) is powered off, the mandrel (2) passes through the dangerous section from the connecting section (5) to enter the limiting section (6) under the pushing of the spring (4), and the limiting section (6) of the pin main body (1) is supported;
when the electromagnet (3) is electrified, the mandrel (2) is magnetically attracted to retract to one side of the connecting section (5) of the dangerous section.
2. The positive locking and unlocking shear pin of claim 1, wherein:
the end part of the connecting section (5) of the pin main body (1) is fixedly connected to the side surface of the vertical plate part (8), and the other side surface of the vertical plate part (8) is fixedly connected with a transverse plate part (9);
the electromagnet (3) is detachably connected with the transverse plate part (9) through bolts.
3. The positive locking and unlocking shear pin of claim 2, wherein:
the vertical plate part (8), the transverse plate part (9) and the pin main body (1) are of an integrated structure; the riser portion (8) has a mounting hole.
4. The positive locking and unlocking shear pin of claim 2, wherein:
the shaft part of the electromagnet (3) is arranged into a hollow structure;
the mandrel (2) comprises: a shaft lever (10) limited on the hollow electromagnet (3), and a shaft cap (11) positioned on one side of the electromagnet (3) facing the pin main body (1);
the spring (4) is sleeved on the shaft lever (10) and is positioned between the electromagnet (3) and the shaft cap (11);
the core shaft (2) forms a support for the limit section (6) of the pin main body (1) through the shaft cap (11).
5. The positive locking and unlocking shear pin of claim 4, wherein:
a plurality of layers of adjusting gaskets (12) are arranged between the electromagnet (3) and the transverse plate part (9).
6. The positive locking and unlocking shear pin of claim 4, wherein:
the end part of the shaft lever (10) penetrates out of 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 backing out.
7. The positive locking and unlocking shear pin of claim 6, wherein:
the transverse plate part (9) is detachably provided with a proximity switch (7) for monitoring the position of the shaft lever (10); the electromagnet (3) is positioned between the proximity switch (7) and the vertical plate part (8).
8. The positive locking and unlocking shear pin of claim 4, wherein:
the end of the limit section (6) of the pin main body (1) is sealed to prevent the mandrel (2) from falling out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223202576.5U CN218971326U (en) | 2022-11-30 | 2022-11-30 | Shear pin capable of being locked and unlocked reliably |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223202576.5U CN218971326U (en) | 2022-11-30 | 2022-11-30 | Shear pin capable of being locked and unlocked reliably |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218971326U true CN218971326U (en) | 2023-05-05 |
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ID=86156912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223202576.5U Active CN218971326U (en) | 2022-11-30 | 2022-11-30 | Shear pin capable of being locked and unlocked reliably |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218971326U (en) |
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2022
- 2022-11-30 CN CN202223202576.5U patent/CN218971326U/en active Active
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