Mining explosion-proof electromagnetic lock
By designing an explosion-proof electromagnetic lock for mining, and utilizing the combination of an electric push rod and a return spring, the problem of accidental opening of mine safety doors was solved, achieving safe and reliable door control and meeting the explosion-proof requirements for mining.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-03
AI Technical Summary
During mining operations, the safety doors in front of and behind the cage and the airtight doors of the pump room are easily opened by accident, posing a safety hazard. Existing hydraulically driven doors are not performing well.
A mine-use explosion-proof electromagnetic lock was designed. The lock head is inserted into the door hole by an electric push rod to stop it. The lock head is disengaged from the door hole by a return spring, ensuring the safety and convenience of the door.
It effectively prevents accidental opening of the door, improves safety and usability, ensures normal opening and closing of the door, and meets the explosion-proof requirements for mining applications.
Smart Images
Figure CN224078878U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electromagnetic lock technology, specifically to a mine explosion-proof electromagnetic lock. Background Technology
[0002] In mining operations, safety doors at the front and rear of cages and airtight doors in pump rooms are typically opened and closed using hydraulic motors. However, this method is prone to accidental opening, posing a safety hazard and proving ineffective. A mine-use explosion-proof electromagnetic lock is needed to address these problems. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a mine explosion-proof electromagnetic lock to solve the problems mentioned in the background technology. This utility model has a reasonable structure, high security, and good performance.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a mine explosion-proof electromagnetic lock, comprising:
[0005] The base has a housing on top, a cover plate on top of the housing, a guide seat through the side wall of the housing, a locking head inside the guide seat, a return spring inside the guide seat and sleeved on the side wall of the locking head, and an electric push rod inside the housing and used to move the locking head on the top of the base.
[0006] Furthermore, the guide seat includes an extension post disposed on the side wall of the housing, and the end of the extension post is provided with a connecting post inserted into the housing, the diameter of the connecting post being smaller than the diameter of the extension post.
[0007] Furthermore, the guide seat has a mounting hole on the side near the electric push rod, and a guide hole communicating with the mounting hole on the side away from the electric push rod.
[0008] The locking head includes a pressing plate disposed inside the mounting hole, and the end of the pressing plate is provided with a guide post located inside the guide hole;
[0009] The diameter of the pressing plate is larger than the diameter of the guide post, and the reset spring is sleeved on the side wall of the guide post.
[0010] Furthermore, a limiting ring is provided on the side of the guide seat near the electric push rod, and a fixing bolt is provided between the limiting ring and the guide seat. The inner diameter of the limiting ring is larger than the diameter of the pressing plate.
[0011] Furthermore, the cover plate includes an extension plate disposed on the top of the housing, a pressure plate disposed on the top of the extension plate, and a fastening bolt disposed at the connection between the pressure plate and the extension plate.
[0012] Furthermore, the base has a support seat located inside the housing at its top, the electric push rod is located at the top of the support seat, the support seat has a mounting seat for pressing the electric push rod at its top, and mounting bolts are provided at the connection between the mounting seat and the support seat.
[0013] Furthermore, at least one wire hole is provided on the side wall of the housing, and a lead wire assembly is provided at the position corresponding to the wire hole on the side wall of the housing;
[0014] The lead assembly includes a flared end, a retaining ring, a sealing ring, and a connecting joint. The connecting joint is disposed on the side wall of the housing. The inner wall of the connecting joint is provided with a sealing ring that communicates with the wire hole. The inner wall of the connecting joint is provided with a retaining ring located above the sealing ring. The connecting joint has a flared end for pressing the retaining ring. The inner diameter of the sealing ring is smaller than the inner diameter of the wire hole.
[0015] Furthermore, the connecting joint has a plug located between the retaining ring and the sealing ring inside, the lower side of the annular side of the plug matches the inner diameter of the sealing ring, and the upper side of the annular side of the plug matches the outer diameter of the sealing ring;
[0016] The connecting joint and the flared opening are connected by threads.
[0017] The beneficial effects achieved by the present invention using the above structure are as follows:
[0018] This invention uses an electric push rod to push the locking head into the hole on the door, thus stopping the door and preventing accidental opening, improving safety and providing good performance. When the door needs to be opened, the electric push rod returns to its initial position, at which point the return spring rebounds, driving the locking head back to its initial position, disengaging it from the hole on the door, and thus losing its ability to stop the door. This does not affect the opening of the door and facilitates preparation for stopping the door again. Attached Figure Description
[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0020] Figure 1 This is a top sectional view of a mine explosion-proof electromagnetic lock according to an embodiment of the present invention;
[0021] Figure 2 This is a front sectional view of a mine explosion-proof electromagnetic lock according to an embodiment of the present invention;
[0022] Figure 3 This is a top view of a mine explosion-proof electromagnetic lock according to an embodiment of the present invention;
[0023] In the diagram: 1. Base; 2. Lead wire assembly; 21. Flared mouth; 22. Retaining ring; 23. Plug; 24. Sealing ring; 25. Connecting joint; 3. Housing; 31. Wire hole; 4. Electric push rod; 5. Guide seat; 51. Connecting post; 52. Extension post; 6. Guide hole; 61. Mounting hole; 7. Locking head; 71. Guide post; 72. Pressing plate; 8. Return spring; 9. Limiting ring; 10. Fixing bolt; 11. Mounting seat; 12. Cover plate; 121. Extension plate; 122. Fastening bolt; 123. Pressure plate; 13. Support seat; 131. Mounting bolt. Detailed Implementation
[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0025] like Figure 1 As shown, this utility model provides a technical solution: a mine explosion-proof electromagnetic lock, comprising:
[0026] The base 1 has a housing 3 on top and a cover plate 12 on top. A guide seat 5 is provided through the side wall of the housing 3. A locking head 7 is provided inside the guide seat 5. A return spring 8 located inside the guide seat 5 is sleeved on the side wall of the locking head 7. An electric push rod 4 located inside the housing 3 and used to push the locking head 7 to move is provided on the top of the base 1. This design uses an electric push rod 4 to push the locking head 7 into the hole on the door, stopping the door and preventing accidental opening, thus improving safety and performance. When the door needs to be opened, the electric push rod 4 returns to its initial position, at which point the return spring 8 rebounds, driving the locking head 7 back to its initial position, disengaging it from the hole on the door, and releasing the door stop. This does not affect the door's opening and facilitates preparation for the next door stop. The telescopic shaft of the electric push rod 4 does not contact the locking head 7 in its initial state, thus avoiding the problem of the electric push rod 4's telescopic shaft and the locking head 7's shafts coinciding, which requires high coaxiality and is detrimental to sealing. This increases the installation tolerance range, reduces the installation precision requirements, avoids stress concentration on the electric push rod 4's telescopic shaft, and improves its service life. Furthermore, the direction of the locking head 7 is perpendicular to the door's opening and closing direction.
[0027] Reference Figure 1 and Figure 2The guide seat 5 includes an extension post 52 disposed on the side wall of the housing 3. The end of the extension post 52 is provided with a connecting post 51 that is inserted into the housing 3. The diameter of the connecting post 51 is smaller than the diameter of the extension post 52. This design facilitates the installation of the guide seat 5.
[0028] Reference Figure 2 The guide seat 5 has a mounting hole 61 on the side close to the electric push rod 4, and a guide hole 6 connected to the mounting hole 61 is provided on the side of the guide seat 5 away from the electric push rod 4.
[0029] The locking head 7 includes a pressing plate 72 disposed inside the mounting hole 61, and the end of the pressing plate 72 is provided with a guide post 71 located inside the guide hole 6;
[0030] The diameter of the pressing plate 72 is larger than the diameter of the guide post 71, and the return spring 8 is sleeved on the side wall of the guide post 71. This design improves the stability of the movement of the guide post 71 through the guide hole 6; the mounting hole 61 facilitates the connection and guidance of the pressing plate 72, improving the stability of the movement of the pressing plate 72; wherein, the mounting hole 61 matches the pressing plate 72, and the guide post 71 matches the guide hole 6; the mounting hole 61 penetrates the connecting post 51 and is located inside the extension post 52, and the guide hole 6 penetrates the end of the extension post 52 and communicates with the mounting hole 61.
[0031] Reference Figure 1 A limiting ring 9 is provided on the side of the guide seat 5 near the electric push rod 4. A fixing bolt 10 is provided between the limiting ring 9 and the guide seat 5. The inner diameter of the limiting ring 9 is larger than the diameter of the pressing plate 72. This design limits the pressing plate 72 that rebounds from the return spring 8 by the limiting ring 9, preventing the pressing plate 72 on the locking head 7 from disengaging from the guide seat 5. The diameter of the telescopic shaft of the electric push rod 4 is smaller than the inner diameter of the limiting ring 9.
[0032] Reference Figure 2 and Figure 3 The cover plate 12 includes an extension plate 121 disposed on the top of the housing 3, a pressure plate 123 disposed on the top of the extension plate 121, and a fastening bolt 122 disposed at the connection between the pressure plate 123 and the extension plate 121. This design facilitates the connection and fixation of the pressure plate 123 and the extension plate 121 on the housing 3 through the fastening bolt 122, thereby improving the reliability of the connection.
[0033] Reference Figure 1 and Figure 2The base 1 has a support seat 13 located inside the housing 3 at its top. The electric push rod 4 is located on top of the support seat 13. The support seat 13 has a mounting seat 11 for pressing the electric push rod 4 at its top. A mounting bolt 131 is provided at the connection between the mounting seat 11 and the support seat 13. This design, through the support seat 13, mounting seat 11, and mounting bolt 131, facilitates the installation of the electric push rod 4, ensuring that the telescopic shaft of the electric push rod 4 can contact the locking head 7, facilitating the application of force to the locking head 7 to push it to move along the inside of the guide seat 5.
[0034] Reference Figure 1 and Figure 3 At least one wire hole 31 is provided on the side wall of the housing 3, and a lead wire assembly 2 is provided at the position corresponding to the wire hole 31 on the side wall of the housing 3.
[0035] The lead assembly 2 includes a flared end 21, a retaining ring 22, a sealing ring 24, and a connecting joint 25. The connecting joint 25 is disposed on the side wall of the housing 3. The inner wall of the connecting joint 25 is provided with a sealing ring 24 that communicates with the wire hole 31. The inner wall of the connecting joint 25 is provided with a retaining ring 22 located above the sealing ring 24. The flared end 21 is provided inside the connecting joint 25 for pressing the retaining ring 22. The inner diameter of the sealing ring 24 is smaller than the inner diameter of the wire hole 31. This design improves the sealing performance at the connection between the sealing ring 24 and the side wall of the housing 3 by pressing the retaining ring 22 with the connecting joint 25, and the retaining ring 22 pressing the sealing ring 24. The wire is passed through the flared end 21, the retaining ring 22, the sealing ring 24, and the wire hole 31 in sequence, facilitating the connection between the wire and the electric push rod 4. The wire fits tightly against the inner wall of the sealing ring 24.
[0036] The connecting joint 25 has a plug 23 located between the retaining ring 22 and the sealing ring 24. The lower side of the annular side of the plug 23 matches the inner diameter of the sealing ring 24, and the upper side of the annular side of the plug 23 matches the outer diameter of the sealing ring 24.
[0037] The connecting joint 25 and the flared mouth 21 are connected by threads. This design seals the sealing ring 24 by fitting the plug 23 against the inner wall of the sealing ring 24, and can seal the wire hole 31 when it is not needed; the threaded connection makes it easy for the connecting joint 25 to press the retaining ring 22, and also makes it easy to remove and put on the plug 23.
[0038] Reference Figures 1-3 ,in, Figure 1 and Figure 2The black dots are welding points, meeting the requirements for explosion-proof applications in mining. The engagement length of the guide hole 6 and the engagement gap between the guide hole 6 and the guide post 71 meet the requirements of GB3836.2-2010 Explosive Atmospheres Part 2: Equipment Protected by Explosion-proof Enclosures "d". As an embodiment of this utility model: when it is necessary to stop the door, the mine explosion-proof electromagnetic lock is installed in a suitable position, i.e., the extension direction of the locking head 7 is perpendicular to the opening and closing direction of the door. When the door is closed, the locking head 7 of the mine explosion-proof electromagnetic lock can be inserted into the hole on the door; the electric push rod 4 pushes the locking head 7... The pressing plate 72 moves along the mounting hole 61 to press the return spring 8. The movement of the pressing plate 72 drives the guide post 71 to insert into the hole on the door along the guide hole 6, stopping the door and preventing accidental opening, thus improving safety and performance. When the door needs to be opened, the electric push rod 4 returns to its initial position. At this time, the return spring 8 rebounds and applies force to the pressing plate 72, driving the guide post 71 in the locking head 7 back to its initial position. The guide post 71 disengages from the hole on the door, losing its ability to stop the door, without affecting the opening of the door. This facilitates preparation for stopping the door again, improving the practicality of this utility model.
[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A flameproof electromagnetic lock for mining, characterized in that, Include: The base (1) is provided with a shell (3) on the top, the shell (3) is provided with a cover plate (12) on the top, the shell (3) is provided with a guide seat (5) through the side wall, the guide seat (5) is provided with a through locking head (7) inside, the locking head (7) is provided with a reset spring (8) in the guide seat (5) inside, the base (1) is provided with an electric push rod (4) in the shell (3) inside and used for pushing the locking head (7) to move.
2. The flameproof electromagnetic lock for mine use according to claim 1, characterized in that, The guide seat (5) includes an extension column (52) provided on the side wall of the shell (3), and the extension column (52) is provided with a connection column (51) inserted into the shell (3) inside, and the diameter of the connection column (51) is smaller than that of the extension column (52).
3. The explosion-proof electromagnetic lock for mining use according to claim 1, characterized in that, The guide seat (5) is provided with a mounting hole (61) on one side close to the electric push rod (4), and the guide seat (5) is provided with a guide hole (6) communicated with the mounting hole (61) on the side away from the electric push rod (4); The locking head (7) includes a pressing disc (72) provided in the mounting hole (61), and the pressing disc (72) is provided with a guide column (71) in the guide hole (6) inside; The diameter of the pressing disc (72) is greater than that of the guide column (71), and the reset spring (8) is sleeved on the side wall of the guide column (71).
4. The flameproof electromagnetic lock for mine use according to claim 3, characterized in that, The guide seat (5) is provided with a limiting ring (9) on one side close to the electric push rod (4), and the limiting ring (9) and the guide seat (5) are provided with a fixing bolt (10) therebetween, and the inner diameter of the limiting ring (9) is greater than that of the pressing disc (72).
5. The explosion-proof electromagnetic lock for mining use according to claim 1, characterized in that, The cover plate (12) includes an extension plate (121) provided on the top of the shell (3), and the extension plate (121) is provided with a pressing plate (123) on the top, and the pressing plate (123) is provided with a fastening bolt (122) at the connection with the extension plate (121).
6. The explosion-proof electromagnetic lock for mining use according to claim 1, characterized in that, The base (1) is provided with a supporting seat (13) in the shell (3) inside, and the electric push rod (4) is located on the top of the supporting seat (13), and the supporting seat (13) is provided with a mounting seat (11) for pressing the electric push rod (4) on the top, and the mounting seat (11) is provided with a mounting bolt (131) at the connection with the supporting seat (13).
7. The explosion-proof electromagnetic lock for mining use according to claim 1, characterized in that, The shell (3) is provided with at least one wire hole (31) on the side wall, and the shell (3) is provided with a lead assembly (2) at the position corresponding to the wire hole (31) on the side wall; The lead assembly (2) comprises a trumpet (21), a check ring (22), a sealing ring (24) and a communication joint (25), the communication joint (25) is arranged on the side wall of the shell (3), the inner wall of the communication joint (25) is provided with the sealing ring (24) communicated with the wire hole (31), the inner wall of the communication joint (25) is provided with the check ring (22) above the sealing ring (24), the inner part of the communication joint (25) is provided with the trumpet (21) for pressing the check ring (22), and the inner diameter of the sealing ring (24) is smaller than the inner diameter of the wire hole (31).
8. The flameproof electromagnetic lock for mine use according to claim 7, characterized in that, The inner part of the communication joint (25) is provided with the plug (23) between the check ring (22) and the sealing ring (24), the inner diameter of the annular side of the plug (23) is matched with the inner diameter of the sealing ring (24), and the outer diameter of the annular side of the plug (23) is matched with the outer diameter of the sealing ring (24). The communication joint (25) and the trumpet (21) are connected through threads.