An electromagnet-driven starter for fire-fighting nitrogen cylinders
By introducing a guide sleeve and a split junction box into the electromagnet-driven starter, the reliability problem of the starter in polluted and space-constrained environments is solved, achieving flexible installation and reliable starting.
Patent Information
- Application Number
- CN202522523045.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-27
AI Technical Summary
Existing electromagnet drive starters are prone to contamination and deformation from external forces when not in use for extended periods, leading to starting failures. Furthermore, the fixed cable direction limits installation in space-constrained environments.
A starter comprising an electromagnet, a guide sleeve, a slide, and a split junction box was designed. The junction box is adjustable in four directions. The design of the guide sleeve and slide ensures the reliability and flexibility of the firing pin.
It achieves reliability and flexibility of the starter, adapts to the needs of different installation scenarios, and avoids start-up failures and installation limitations.
Smart Images
Figure CN224937565U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an automatic actuator for puncturing the diaphragm of a fire-fighting nitrogen cylinder, and in particular to an electromagnet-driven actuator for a fire-fighting nitrogen cylinder, belonging to the field of electromagnetic technology. Background Technology
[0002] In a heptafluoropropane fire extinguishing system, nitrogen cylinders serve as the core auxiliary component, driving the release of the heptafluoropropane extinguishing agent. As part of the initial cylinder group, once a fire occurs and the system confirms the fire, the controller triggers a solenoid valve to open the nitrogen cylinder. High-pressure nitrogen then pushes open the container valve of the heptafluoropropane cylinder, providing the power for the release of the extinguishing agent. In automatic activation, a power-triggered electromagnet device drives a striking pin to puncture the diaphragm of the nitrogen gas cylinder. This is also known as an electromagnet-driven starter or electromagnetic starter. Existing electromagnet-driven starters use a striking pin fixed to the electromagnet's push rod. In this case, a significant portion of the striking pin is exposed outside the electromagnet, which can easily become contaminated in some situations (such as offshore oil and gas platforms) and deformed by external forces. This can lead to activation failure, preventing the fire extinguishing system from starting. Furthermore, the fixed wiring direction of the electromagnets used in this application restricts installation in space-constrained environments. Summary of the Invention
[0003] The purpose of this utility model is to provide an electromagnet-driven starter for nitrogen cylinders used in fire fighting.
[0004] To achieve the purpose of this utility model, the following technical solution is adopted: an electromagnet drive starter for fire-fighting nitrogen cylinders, comprising an electromagnet, wherein the electromagnet includes a magnetic core tube, the magnetic core tube is located inside the outer shell, the front end of the magnetic core tube is a stationary iron, a moving iron is slidably installed in a guide sleeve, a push rod is fixedly connected to the moving iron, a manual push rod is installed at the rear end of the electromagnet, the manual push rod has a first pin hole, a first safety pin is installed in the first pin hole, a junction box is fixedly installed on the outer shell of the electromagnet, an outlet pipe is fixedly connected to the junction box, a guide sleeve is fixedly connected to the front part of the stationary iron, the guide sleeve has a shoulder near the front end, a mating hole for the striker to pass through is opened on the guide sleeve in front of the shoulder, a slide is slidably fitted in the guide sleeve, the striker is fixedly connected to the slide, a return spring is installed between the shoulder and the slide, the two ends of the return spring abut against the shoulder and the slide respectively.
[0005] Furthermore, corresponding second pin holes are provided on the guide sleeve and the slide, and the second safety pin is installed in the second pin hole.
[0006] Furthermore, the junction box is a split-type junction box, which includes an upper box and a lower box. The lower box has four screw holes located at the four corners of a square. The upper box has countersunk holes opposite to the four screw holes. The upper box and the lower box are fixedly connected together by bolts passing through the countersunk holes and screw holes. The cable outlet is fixedly connected to the upper box.
[0007] Furthermore, the lower box contains a cylinder, and the upper box contains a circular cavity. The cylinder fits into the circular cavity, and the cylinder and the circular cavity are concentric with the center of the square.
[0008] The positive and beneficial technical effects of this utility model are as follows: the structure of this utility model is reliable, and the junction box is adjustable in four directions (front, back, left, and right) to meet the wiring needs in different directions. The specific implementation method will be described in detail below. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the present invention.
[0010] Figure 2 This is a discrete schematic diagram of the screw hole surface mating of the junction box.
[0011] Figure 3 This is a separate schematic diagram of the upper and lower parts of the junction box. Detailed Implementation
[0012] To more fully explain the implementation of this utility model, implementation examples are provided. These implementation examples are merely illustrative of this utility model and do not limit its scope.
[0013] The present invention will be further explained in detail with reference to the accompanying drawings, in which the following references are made: 1: outer shell; 2: guide sleeve; 3: moving iron; 4: stationary iron; 5: slide block; 6: guide sleeve; 7: striking pin; 8: shoulder; 9: return spring; 10: second safety pin; 11: push rod; 12: junction box; 13: cable outlet; 14: first safety pin; 15: second safety pin; 16: manual push rod; 17: mating hole; 121: lower box body; 122: screw hole; 123: cylinder; 124: upper box body; 125: countersunk hole; 126: circular cavity.
[0014] The electromagnet in this application is a product of the prior art, and can be manufactured as a general-purpose product or an explosion-proof product as needed. Based on the prior art, this application adds a guide sleeve and a slide block in front of the stationary iron, and innovates the design of the junction box. After removing the bolts, the upper box can rotate along the lower box, and the cable outlet can be adjusted in four directions to adapt to the needs of the installation site.
[0015] As shown in the attached diagram, an electromagnet-driven starter for fire-fighting nitrogen cylinders includes an electromagnet. The electromagnet comprises a magnetic core tube located inside a housing. A stationary iron 4 is located at the front end of the magnetic core tube, and a moving iron 3 is slidably mounted within a guide sleeve 2. A push rod 11 is fixedly connected to the moving iron. A manual push rod 15 is installed at the rear end of the electromagnet. The manual push rod has a first pin hole, in which a first safety pin 14 is installed. The manual push rod and the first safety pin are to prevent the electromagnet from failing to operate due to power loss or gas malfunction. After removing the first safety pin, the push rod can be pushed out manually. A junction box 12 is fixedly installed on the housing of the electromagnet, with a lead wire... The conduit 13 is fixedly connected to the junction box, which is a split-type junction box. The junction box includes an upper box body 121 and a lower box body 124. The lower box body has four screw holes 122 located at the four corners of a square. The upper box body has countersunk holes 125 corresponding to the four screw holes. The upper and lower box bodies are fixedly connected together by bolts passing through the countersunk holes and screw holes. The conduit is fixedly connected to the upper box body. More specifically, the lower box body contains a cylinder 123, and the upper box body contains a circular cavity 126. The cylinder fits into the circular cavity, and the cylinder and cavity are concentric with the center of the square. Thus, the four countersunk holes in the front, back, left, and right directions can correspond to the four screw holes.
[0016] A guide sleeve 6 is fixedly connected to the front of the stationary iron. Near the front end of the guide sleeve is a shoulder 8. A mating hole 16 for the striker to pass through is provided on the guide sleeve in front of the shoulder. A slide block is slidably fitted inside the guide sleeve. The striker 7 is fixedly connected to the slide block. A return spring 9 is installed between the shoulder and the slide block, with its two ends abutting against the shoulder and the slide block respectively. Corresponding second pin holes are provided on the guide sleeve and the slide block. A second safety pin 10 is installed in the second pin hole. The second safety pin is used during assembly to prevent the striker from being pushed out and bent or injured after the electromagnet is energized. After assembly, when in use, the second safety pin is pulled out.
[0017] When this electromagnet-driven starter is working, after the electromagnet is energized, it drives the push rod to move in the direction of the stationary iron, pushing the slide to compress the return spring, causing the striker to be pushed out and puncture the diaphragm of the nitrogen cylinder. After the electromagnet is de-energized, the push rod retracts, and the slide returns to its original position under the action of the return spring.
[0018] After a detailed description of the embodiments of this utility model, those skilled in the art will clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent applications. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the scope of the technical solution of this utility model, and this utility model is not limited to the embodiments of the examples given in the specification.
Claims
1. An electromagnet-driven starter for fire-fighting nitrogen cylinders, comprising an electromagnet, the electromagnet including a magnetic core tube located inside a housing, a stationary iron at the front end of the magnetic core tube, a moving iron slidably mounted inside a guide sleeve, a push rod fixedly connected to the moving iron, a manual push rod installed at the rear end of the electromagnet, the manual push rod having a first pin hole, a first safety pin installed in the first pin hole, a junction box fixedly mounted on the housing of the electromagnet, and an output conduit fixedly connected to the junction box, characterized in that: A guide sleeve is fixedly connected to the front of the stationary iron. The guide sleeve has a shoulder near the front end. A mating hole for the firing pin to pass through is opened on the guide sleeve in front of the shoulder. The slide is slidably fitted in the guide sleeve. The firing pin is fixedly connected to the slide. A return spring is installed between the shoulder and the slide. The two ends of the return spring abut against the shoulder and the slide respectively.
2. The electromagnet-driven starter for fire-fighting nitrogen cylinders according to claim 1, characterized in that: A second pin hole is provided on the guide sleeve and the slide, and a second safety pin is installed in the second pin hole.
3. The electromagnet-driven starter for fire-fighting nitrogen cylinders according to claim 1, characterized in that: The junction box is a split junction box, which includes an upper box and a lower box. The lower box has four screw holes located at the four corners of a square. The upper box has countersunk holes opposite to the four screw holes. The upper box and the lower box are fixedly connected together by bolts passing through the countersunk holes and screw holes. The cable outlet is fixedly connected to the upper box.
4. The electromagnet-driven starter for fire-fighting nitrogen cylinders according to claim 3, characterized in that: The lower box contains a cylinder, and the upper box contains a circular cavity. The cylinder fits into the circular cavity, and the cylinder and the circular cavity are concentric and concentric with the center of the square.