Electric magnetic composite type opening and closing mechanism of fire water cannon

Abstract

The utility model discloses a kind of electric magnetic attraction composite type opening and closing mechanism of fire water cannon, comprising: valve body, fluid passage is equipped in valve body, fluid passage includes the main control section and precision control section being mutually staggered, communication passage is equipped between main control section and precision control section and is communicated with each other by communication passage;Main valve core and precision control valve core, electromagnetic drive mechanism, electromagnetic drive mechanism is connected with main valve core, precision control mechanism is connected with precision control valve core, precision control mechanism is used to drive precision control valve core to move, to block or open communication passage close to precision control section one end, by the electromagnetic drive of main valve core cooperation motor drive of precision control valve core Realize the accurate regulation and control of fluid passage flow while realizing the quick opening and closing of fluid passage, while using the setting of main control section and precision control section can substantially reduce the water hammer effect of fluid to precision control valve core when main valve core opens, to ensure the durability of precision control valve core.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting equipment technology, and more specifically to an electric magnetic attraction composite opening and closing mechanism for a fire monitor. Background Technology

[0002] As an important fire-fighting device, fire monitors need to be able to quickly open and shut off large flow rates (e.g., to prevent water damage and respond quickly to fires), while also needing to be able to precisely adjust small flow rates (e.g., to extinguish residual fires and cool down the area). This requires that their opening and closing structures have both rapid response and precise adjustment capabilities.

[0003] In response, most fire monitors on the market use a single solenoid valve or an electric regulating valve for their opening and closing mechanisms. However, using an electromagnet as the driving source only enables a two-position, two-way switching element, which cannot remain in the middle position to achieve precise and continuous flow adjustment. Even when using a high-frequency pulse method, there are problems such as unstable control, low accuracy, and significant impact on the valve core and seals. In addition, if an electric regulating valve is used, this type of mechanism cannot achieve rapid opening and closing while achieving precise flow control, with an opening and closing time of several seconds, which cannot meet the needs of emergency fire scenarios where large-flow water supply needs to be cut off. Therefore, improvements are needed. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an electric magnetic composite opening and closing mechanism for fire monitors, which achieves rapid response and precise flow control through the setting of main valve core and precision control valve core.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An electric magnetic attraction composite opening and closing mechanism for a fire monitor includes: The valve body is provided with a fluid channel, which includes a main control section and a fine control section that are staggered to each other. The main control section and the fine control section are connected by a connecting channel and are interconnected with each other through the connecting channel. The main valve core and the precision control valve core are respectively disposed in the main control section and the precision control section; An electromagnetic drive mechanism is connected to the main valve core. The electromagnetic drive mechanism is used to drive the main valve core to move in order to block or open the communication channel near one end of the main control section. A precision control mechanism is connected to a precision control valve core. The precision control mechanism is used to move the precision control valve core to block or open the communication channel near one end of the precision control section.

[0006] As a further improvement of this utility model, the precision control mechanism includes a motor and a screw. The output shaft of the motor is connected to the screw via a transmission. The screw is threadedly connected to the precision control valve core. The motor is used to drive the screw to rotate and drive the precision control valve core to move along the screw axis.

[0007] As a further improvement of this utility model, the electromagnetic drive mechanism includes a control coil and a spring. When the control coil is energized, it generates an electromagnetic driving force along the axis of the main valve core. The spring is connected to the main valve core and is used to provide a restoring force to the main valve core.

[0008] As a further improvement of this utility model, a sealing ring is provided at the end of the main valve core, and an annular groove that fits the sealing ring is provided at the connection between the main control section and the connecting channel.

[0009] As a further improvement of this utility model, the end of the precision control valve core is formed into a conical structure, and the connection between the precision control section and the connecting channel is formed into a conical groove that is adapted to the conical structure.

[0010] As a further improvement of this utility model, the axes of the main control section and the fine control section are parallel to each other.

[0011] As a further improvement of this utility model, it also includes a controller, which is electrically connected to the electromagnetic drive mechanism and the precision control mechanism respectively, and the controller is configured as follows: When the fluid channel is opened or closed, the controller first controls the electromagnetic drive mechanism to drive the main valve core to open, and then controls the precision control mechanism to drive the precision control valve core to open.

[0012] The beneficial effects of this utility model are as follows: by combining the electromagnetic drive of the main valve core with the motor drive of the precision control valve core, the fluid channel can be opened and closed quickly while the flow rate of the fluid channel can be precisely controlled. At the same time, the setting of the main control section and the precision control section can greatly reduce the water hammer effect of the fluid on the precision control valve core when the main valve core is opened, thereby ensuring the durability of the precision control valve core. Attached Figure Description

[0013] Figure 1 This is a schematic cross-sectional view of the overall installation of this utility model.

[0014] Reference numerals in the attached diagram: 1. Valve body; 2. Fluid passage; 3. Main control section; 4. Fine control section; 5. Connection channel; 6. Main valve core; 7. Fine control valve core; 8. Electromagnetic drive mechanism; 9. Fine control mechanism; 10. Motor; 11. Screw; 12. Stationary iron core; 13. Moving iron core; 14. Control coil; 15. Spring; 16. Sealing ring; 17. Annular groove; 18. Conical structure; 19. Conical groove. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.

[0016] like Figure 1 As shown, an electric magnetic attraction composite opening and closing mechanism for a fire monitor includes a valve body 1, a main valve core 6, a precision control valve core 7, an electromagnetic drive mechanism 8, a precision control mechanism 9, and a controller.

[0017] Specifically, the valve body 1 has a fluid channel 2 inside, which includes a main control section 3 and a fine control section 4. The main control section 3 and the fine control section 4 are upstream and downstream of the fluid channel 2, respectively. The fluid passes through the main control section 3 and the fine control section 4 in sequence. In this embodiment, the axes of the main control section 3 and the fine control section 4 are parallel to each other and staggered vertically. One end of the main control section 3 and the fine control section 4 are aligned with each other, and the main control section 3 and the fine control section 4 are connected to each other through a connecting channel, so that the main control section 3, the connecting channel 5 and the fine control section 4 constitute a complete fluid passage.

[0018] Furthermore, the main valve core 6 is located within the main control section 3, and the electromagnetic drive mechanism 8 is driven by the main valve core 6. Specifically, the electromagnetic drive mechanism 8 includes a stationary iron core 12, a moving iron core 13, a control coil 14, and a spring 15. The stationary iron core 12 is fixedly mounted on the valve body 1, the control coil 14 is wound around the outside of the stationary iron core 12, the moving iron core 13 is fixedly connected to the upper end of the main valve core 6, and is magnetically coupled to the stationary iron core 12. The two ends of the spring 15 are connected to the valve body 1 and the main valve core 6 respectively, and always provide the main valve core 6 with a reset force toward the main control section 3.

[0019] Since the main valve core 6 provides the primary seal for the fluid channel 2, a sealing ring 16 is installed at the lower end of the main valve core 6 to ensure the sealing effect of the main valve core 6 on the connecting channel. At the connection port between the main control section 3 and the connecting channel, an annular groove 17 that fits the sealing ring 16 is machined. When the main valve core 6 moves downward under the action of the spring 15, the sealing ring 16 is tightly pressed into the annular groove 17, thereby achieving a reliable seal at the connection port and cutting off the fluid from the main control section 3.

[0020] The annular groove 17 is designed to position the sealing ring 16, thereby reducing the displacement of the sealing ring 16 caused by the impact of water hammer on the main valve core 6 during rapid closure and ensuring the sealing effect of the sealing ring 16.

[0021] Furthermore, the precision control valve core 7 is disposed within the precision control section 4, and the precision control mechanism 9 is driven and connected to the precision control valve core 7. Specifically, the precision control mechanism 9 includes a motor 10 and a screw 11. The motor 10 is preferably a servo motor 10. The motor 10 is fixedly installed on one side of the valve body 1, and its output shaft is coaxially fixedly connected to the screw 11 through a coupling. The upper end of the precision control valve core 7 is machined with a tapered structure 18, and the rear end is machined with an internal threaded hole, forming a screw 11 nut pair with the screw 11. Moreover, the precision control valve core 7 abuts against and is limited by the inner wall of the precision control section 4, so that when rotating, the precision control valve core 7 can be driven to move along the axial direction of the screw 11.

[0022] Furthermore, at the connection point between the precision control section 4 and the connecting channel, a conical groove 19 adapted to the conical structure 18 is machined. Through the axial movement of the precision control valve core 7, the fitting clearance between the conical structure 18 and the conical groove 19 can change continuously, thereby achieving precise control of the flow channel cross-sectional area at this location.

[0023] Furthermore, the controller is a control circuit board, which is electrically connected to the control coil 14 of the electromagnetic drive mechanism 8 and the motor 10 of the precision control mechanism 9 via cables.

[0024] The controller is configured to perform the following workflow: When fluid channel 2 is opened, the controller first energizes the control coil 14 of the electromagnetic drive mechanism 8. The coil generates a magnetic field, which drives the moving iron core 13 and the main valve core 6 to move backward against the elastic force of the spring 15, causing the sealing ring 16 at the front end of the main valve core 6 to disengage from the annular groove 17, and the passage between the main control section 3 and the connecting channel is quickly opened.

[0025] Furthermore, after the main valve core 6 is fully opened (achieved in this embodiment through a preset delay), the controller sends a pulse signal to the motor 10 of the precision control mechanism 9. The motor 10 drives the screw 11 to rotate, which, through threaded transmission, moves the precision control valve core 7 downward, causing its conical structure 18 to gradually move away from the conical groove 19. By controlling the number of rotations of the motor 10, the opening degree of the precision control valve core 7 can be precisely controlled, thereby achieving fine regulation of the flow rate.

[0026] When fluid channel 2 is closed, the controller cuts off the power to the control coil 14 of the electromagnetic drive mechanism 8. The electromagnetic force disappears, and the main valve core 6 moves forward rapidly under the push of the spring 15, causing the sealing ring 16 to be pressed into the annular groove 17, thereby achieving rapid sealing and cutting off of the main channel.

[0027] Furthermore, the controller controls the motor 10 of the precision control mechanism 9 to reverse, driving the precision control valve core 7 to move upward until its conical structure 18 completely contacts the conical groove 19, thus completely closing the passage between the precision control section 4 and the connecting channel.

[0028] Since the main valve core 6 takes priority in both open and closed states, the fluid channel 2 can be opened and closed quickly. At the same time, in the open state, the flow rate of the fluid channel 2 can be precisely adjusted by the precision control valve core 7 to meet the usage requirements.

[0029] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An electric magnetic attraction composite opening and closing mechanism for a fire monitor, characterized in that, include: A valve body (1) is provided with a fluid channel (2) inside the valve body (1). The fluid channel (2) includes a main control section (3) and a fine control section (4) arranged in a staggered manner. A connecting channel is provided between the main control section (3) and the fine control section (4) and they are connected to each other through the connecting channel. The main valve core (6) and the precision control valve core (7) are respectively located in the main control section (3) and the precision control section (4); Electromagnetic drive mechanism (8), which is connected to the main valve core (6), is used to drive the main valve core (6) to move so as to block or open the communication channel near one end of the main control section (3); The precision control mechanism (9) is connected to the precision control valve core (7). The precision control mechanism (9) is used to drive the precision control valve core (7) to move so as to block or open the communication channel near one end of the precision control section (4).

2. The electric magnetic attraction composite opening and closing mechanism for a fire monitor according to claim 1, characterized in that, The precision control mechanism (9) includes a motor (10) and a screw (11). The output shaft of the motor (10) is connected to the screw (11) for transmission. The screw (11) is threadedly connected to the precision control valve core (7). The motor (10) is used to drive the screw (11) to rotate and drive the precision control valve core (7) to move along the axis of the screw (11).

3. The electric magnetic attraction composite opening and closing mechanism for a fire monitor according to claim 1, characterized in that, The electromagnetic drive mechanism (8) includes a control coil (14) and a spring (15). When the control coil (14) is energized, it generates an electromagnetic drive force along the axis of the main valve core (6). The spring (15) is connected to the main valve core (6) and is used to provide a restoring force to the main valve core (6).

4. The electric magnetic attraction composite opening and closing mechanism for a fire monitor according to claim 1, characterized in that: The main valve core (6) is provided with a sealing ring (16) at its end, and the connection between the main control section (3) and the communication channel is provided with an annular groove (17) that fits the sealing ring (16).

5. The electric magnetic attraction composite opening and closing mechanism for a fire monitor according to claim 1, characterized in that, The end of the precision control valve core (7) forms a conical structure (18), and the connection between the precision control section (4) and the communication channel forms a conical groove (19) that is adapted to the conical structure (18).

6. The electric magnetic attraction composite opening and closing mechanism for a fire monitor according to claim 1, characterized in that, The axes of the main control section (3) and the fine control section (4) are parallel to each other.

7. The electric magnetic attraction composite opening and closing mechanism for a fire monitor according to any one of claims 1-6, characterized in that, It also includes a controller, which is electrically connected to the electromagnetic drive mechanism (8) and the precision control mechanism (9), respectively, and the controller is configured to: When the fluid channel (2) is opened or closed, the controller first controls the electromagnetic drive mechanism (8) to drive the main valve core (6) to open, and then controls the precision control mechanism (9) to drive the precision control valve core (7) to open.

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