Electromagnetic actuating mechanism for cut-off type valve
By designing an electromagnetic actuator for a cut-off valve, using the design of a tension spring and a limiting block, the problems of complex structure and low reliability of the electromagnetic actuator in the prior art are solved, and fast and reliable valve closure in emergency situations are achieved.
Patent Information
- Application Number
- CN202420031713.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-08
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-01-08
AI Technical Summary
The electromagnetic actuator in existing cutoff valves has a complex structure and the risk of being unable to be performed normally during use. It cannot meet the need for quick action to close the valve in an emergency. It is low reliability and difficult to maintain.
An electromagnetic actuator for a cut-off valve is designed, including a bracket, an electromagnetic iron, a hanging plate, a spring and a limit block. The tension of the spring turns the hanging plate to cancel the limit, allowing the gate plate to close the valve under the action of its own weight, and the limit shaft can be manually pulled out to achieve rapid closing.
It improves the reliability and rapid closing capability of the cut-off valve in emergency situations, has a simple structure and is easy to maintain, and has low cost, which meets the needs of rapid action in emergency situations.
Smart Images
Figure CN222687428U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to an electromagnetic actuator for a cut-off valve. Background Art
[0002] The shut-off valve is a valve mainly installed on the supply and return air ducts of ventilation and air-conditioning systems or on the pipelines of mechanical fire protection systems. It is normally open. In the event of a fire, the control center will give an electrical signal to drive the valve blades to close, cutting off the airflow to prevent the spread of fire and smoke. It can meet the requirements of fire resistance stability and fire resistance integrity within a certain period of time and play a role in isolating smoke and preventing fire.
[0003] Usually, the shut-off valve is composed of a valve body, a blade and an electromagnetic actuator. The blade and the electromagnetic actuator are installed on the valve body to ensure that the fire-proof pipes and fire-proof partitions can effectively isolate smoke and fire, and meet the fire protection requirements of special environments such as nuclear power plant pipelines.
[0004] However, the electromagnetic actuators in existing shutoff valves have a complex structure and are at risk of not being able to perform normally during use. They cannot meet the requirement of rapid action to close the valve quickly in an emergency, have low reliability, and are difficult to maintain.
[0005] Therefore, how to improve the reliability of the shut-off valve in quickly actuating and closing the valve in an emergency situation is a technical problem to be solved urgently in the art. Utility Model Content
[0006] The purpose of the utility model is to provide an electromagnetic actuator for a cut-off valve, so as to solve the problems existing in the above-mentioned prior art and improve the reliability of the cut-off valve.
[0007] To achieve the above purpose, the utility model provides the following solutions:
[0008] The utility model provides an electromagnetic actuator for a cut-off valve, the cut-off valve comprising a valve body and a gate plate slidably matched with the valve body in a vertical direction, the gate plate being arranged vertically, and a limit block being fixedly arranged on the gate plate; the electromagnetic actuator comprising a bracket, an electromagnet, a hanging plate and a tension spring, the bracket being fixedly connected with the valve body, the electromagnet being fixedly arranged on the bracket, the middle part of the hanging plate being rotatably connected with the bracket, a permanent magnet being fixedly arranged at the first end of the hanging plate, the electromagnet being able to attract and contact the permanent magnet, the hanging plate being arranged vertically, one end of the tension spring being connected with the bracket, and the other end being connected with the first end of the hanging plate, the tension spring being used to rotate the first end of the hanging plate in a direction away from the electromagnet, and a limit axis being arranged at the second end of the hanging plate; when the electromagnet is attracted and contacted with the permanent magnet, the limit axis can contact with the bottom surface of the limit block; and when the limit axis abuts against the bottom surface of the limit block, the cut-off valve is in a normally open state.
[0009] Preferably, the axis of the limit shaft is perpendicular to the gate plate, the hanging plate includes a bending portion, the bending portion includes a horizontal plate and a vertical plate, one end of the horizontal plate is fixedly connected to the second end of the hanging plate, and the other end is fixedly connected to the bottom end of the vertical plate, the limit shaft passes through the vertical plate and the hanging plate, and the limit shaft slides with the hanging plate and the vertical plate, a compression spring is sleeved on the limit shaft and located between the hanging plate and the vertical plate, one end of the compression spring abuts against the vertical plate, and the other end abuts against the step surface on the limit shaft, and the end of the limit shaft close to the gate plate abuts against the gate plate.
[0010] Preferably, the hanging plate is integrally formed.
[0011] Preferably, the bracket is made of angle steel and is arranged horizontally.
[0012] Preferably, the limiting axis is located below the bracket.
[0013] Preferably, the position, size and shape of the limit block are designed to meet the requirement that when the limit shaft abuts against the bottom surface of the limit block and the first end of the hanging plate rotates in a direction away from the electromagnet, the limit block will not hinder the limit shaft from rotating toward the electromagnet.
[0014] Preferably, the middle portion of the hanging plate is rotatably connected to the bracket via a rotating shaft, the bracket is fixedly connected to the rotating shaft, and the rotating shaft is rotatably matched with the hanging plate via a bearing.
[0015] Compared with the prior art, the utility model has achieved the following technical effects:
[0016] The electromagnetic actuator for the shutoff valve of the utility model can rotate the hanging plate through the tension of the tension spring after the electromagnet is powered off, so that the limit shaft on the hanging plate no longer limits the limit block on the gate plate, and then the gate plate can fall under the action of its own weight, thereby closing the shutoff valve, and the reliability of valve closing is high.
[0017] Furthermore, the electromagnetic actuator for the cut-off valve of the utility model has a simple structure and is easy to maintain.
[0018] Furthermore, when in use, the electromagnetic actuator for the shut-off valve of the utility model can also allow on-site personnel to manually pull out the limit shaft so that the limit shaft no longer limits the limit block, thereby allowing the gate to fall under the action of its own weight, thereby closing the shut-off valve; allowing on-site personnel to quickly close the shut-off valve in an emergency, which is easy to use.
[0019] Furthermore, the bracket in the electromagnetic actuator for the cut-off valve of the utility model can directly adopt angle steel, which is low in cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0021] Figure 1 It is a structural schematic diagram of a cut-off valve equipped with the electromagnetic actuator for the cut-off valve of the utility model;
[0022] Figure 2 It is a structural schematic diagram of the electromagnetic actuator for the cut-off valve of the utility model;
[0023] Figure 3 for Figure 2 AA cross-sectional diagram of ;
[0024] Figure 4 It is a structural schematic diagram of the electromagnetic actuator for the cut-off valve of the utility model;
[0025] Among them, 100, valve body; 200, gate; 300, electromagnetic actuator; 1, bracket; 2, hanging plate; 3, tension spring; 4, electromagnet; 5, rotating shaft; 6, compression spring; 7, limit shaft; 8, horizontal plate; 9, vertical plate; 10, limit block; 11, permanent magnet. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] The purpose of the utility model is to provide an electromagnetic actuator for a cut-off valve, so as to solve the problems existing in the above-mentioned prior art and improve the reliability of the cut-off valve.
[0028] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0029] like Figure 1-Figure 4 As shown, this embodiment provides an electromagnetic actuator 300 for a shut-off valve. The shut-off valve includes a valve body 100 and a gate plate 200 that slides with the valve body 100 in a vertical direction. The gate plate 200 is vertically arranged, and a limit block 10 is fixed on the gate plate 200.
[0030] The electromagnetic actuator 300 for the shutoff valve of this embodiment includes a bracket 1, an electromagnet 4, a hanging plate 2 and a tension spring 3. The bracket 1 is fixedly connected to the valve body 100, the electromagnet 4 is fixedly arranged on the bracket 1, the middle part of the hanging plate 2 is rotatably connected to the bracket 1, the first end of the hanging plate 2 is fixedly provided with a permanent magnet 11, the electromagnet 4 can be attracted to and contact with the permanent magnet 11, the hanging plate 2 is vertically arranged, one end of the tension spring 3 is connected to the bracket 1, and the other end is connected to the first end (i.e., the top end) of the hanging plate 2, the tension spring 3 is used to make the first end of the hanging plate 2 rotate in a direction away from the electromagnet 4, and the second end (i.e., the bottom end) of the hanging plate 2 is provided with a limit shaft 7; when the electromagnet 4 and the permanent magnet 11 are attracted to and contact with each other, the limit shaft 7 can contact with the bottom surface of the limit block 10; and when the limit shaft 7 abuts against the bottom surface of the limit block 10, the shutoff valve is in a normally open state.
[0031] During use of the electromagnetic actuator 300 for the cut-off valve of this embodiment, when an emergency such as a fire occurs, after the power supply of the electromagnet 4 is cut off, the tension force applied by the tension spring 3 to the hanging plate 2 can cause the hanging plate 2 to rotate (refer to Figure 4), so that the limit shaft 7 on the hanging plate 2 no longer limits the limit block 10 on the gate plate 200, and then the gate plate 200 can fall under the action of its own weight, thereby closing the cut-off valve, and the reliability of valve closing is high. When resetting, first lift the gate plate 200, and by energizing the electromagnet 4, the electromagnet 4 gives suction to the permanent magnet 11, thereby driving the first end of the hanging plate 2 to rotate toward the permanent magnet until the permanent magnet 11 contacts the electromagnet 4, so that the limit shaft 7 is located directly below the limit block 10, and the limit shaft 7 continues to limit the limit block 10, keeping the cut-off valve in the normally open state.
[0032] In the optional scheme of this embodiment, it is more preferred that the axis of the limit shaft 7 is perpendicular to the gate plate 200, the hanging plate 2 includes a bending portion, the bending portion includes a horizontal plate 8 and a vertical plate 9, one end of the horizontal plate 8 is fixedly connected to the second end of the hanging plate 2, and the other end is fixedly connected to the bottom end of the vertical plate 9, the limit shaft 7 passes through the vertical plate 9 and the hanging plate 2, and the limit shaft 7 slides with the hanging plate 2 and the vertical plate 9, the limit shaft 7 is sleeved with a compression spring 6 located between the hanging plate 2 and the vertical plate 9, one end of the compression spring 6 abuts against the vertical plate 9, and the other end abuts against the step surface on the limit shaft 7, and the end of the limit shaft 7 close to the gate plate 200 abuts against the gate plate 200.
[0033] When in use, the electromagnetic actuator 300 for the shut-off valve of this embodiment can also allow on-site personnel to manually pull out the limit shaft 7, so that the limit shaft 7 no longer limits the limit block 10, and then the gate 200 can fall under the action of its own weight, thereby closing the shut-off valve; allowing on-site personnel to quickly close the shut-off valve by pulling out the limit shaft 7 in an emergency, which is easy to use; when resetting, only the limit shaft 7 needs to be pulled out again, the gate 200 needs to be lifted, and then the limit shaft 7 needs to be released, so that the limit shaft 7 continues to limit the limit block 10, thereby keeping the shut-off valve in a normally open state.
[0034] In the optional solutions of this embodiment, it is more preferred that the hanging plate 2 is integrally formed and made of metal or plastic, which is simple to manufacture and low in cost.
[0035] In the optional solutions of this embodiment, it is more preferred that the bracket 1 is made of angle steel and the bracket 1 is arranged horizontally.
[0036] In this embodiment, the limit shaft 7 is located below the bracket 1; the position, size and shape of the limit block 10 must be designed to meet the requirements that when the limit shaft 7 abuts against the bottom surface of the limit block 10 and the first end of the hanging plate 2 rotates away from the electromagnet 4, the limit block 10 will not prevent the limit shaft 7 from rotating toward the electromagnet 4. Figure 2, since the limit shaft 7 rotates counterclockwise with the hanging plate 2 when the electromagnet 4 loses power, a chamfer is set at the lower right corner of the limit block 10 to provide an avoidance space for the limit shaft 7 to rotate with the hanging plate 2.
[0037] In the optional scheme of this embodiment, it is more preferred that the middle part of the hanging plate 2 is rotatably connected to the bracket 1 through the rotating shaft 5, the bracket 1 is fixedly connected to the rotating shaft 5, and the rotating shaft 5 is rotatably matched with the hanging plate 2 through a bearing.
[0038] The electromagnetic actuator 300 for the cut-off valve of the utility model has fewer parts, a simple structure and is easy to maintain.
[0039] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.
Claims
1. An electromagnetic actuator for a cut-off valve, characterized in that: The shutoff valve comprises a valve body and a gate plate which is slidably matched with the valve body in a vertical direction, the gate plate is arranged vertically, and a limit block is fixedly arranged on the gate plate; the electromagnetic actuator comprises a bracket, an electromagnet, a hanging plate and a tension spring, the bracket is fixedly connected to the valve body, the electromagnet is fixedly arranged on the bracket, the middle part of the hanging plate is rotatably connected to the bracket, a permanent magnet is fixedly arranged on the first end of the hanging plate, the electromagnet can be attracted to and contact with the permanent magnet, the hanging plate is arranged vertically, one end of the tension spring is connected to the bracket, and the other end is connected to the first end of the hanging plate, the tension spring is used to rotate the first end of the hanging plate in a direction away from the electromagnet, and a limit axis is arranged on the second end of the hanging plate; when the electromagnet is attracted to and contacted with the permanent magnet, the limit axis can contact with the bottom surface of the limit block; and when the limit axis abuts against the bottom surface of the limit block, the shutoff valve is in a normally open state.
2. The electromagnetic actuator for a cut-off valve according to claim 1, characterized in that: The axis of the limiting shaft is perpendicular to the gate plate, the hanging plate includes a bending portion, and the bending portion includes a horizontal plate and a vertical plate. One end of the horizontal plate is fixedly connected to the second end of the hanging plate, and the other end is fixedly connected to the bottom end of the vertical plate. The limiting shaft passes through the vertical plate and the hanging plate, and the limiting shaft slides with the hanging plate and the vertical plate. A compression spring located between the hanging plate and the vertical plate is sleeved on the limiting shaft, one end of the compression spring abuts against the vertical plate, and the other end abuts against the step surface on the limiting shaft, and one end of the limiting shaft close to the gate plate abuts against the gate plate.
3. The electromagnetic actuator for a cut-off valve according to claim 1, characterized in that: The hanging plate is integrally formed.
4. The electromagnetic actuator for a cut-off valve according to claim 1, characterized in that: The bracket is made of angle steel and is arranged horizontally.
5. The electromagnetic actuator for a cut-off valve according to claim 1, characterized in that: The limiting shaft is located below the bracket.
6. The electromagnetic actuator for a cut-off valve according to claim 5, characterized in that: The position, size and shape of the limit block must be designed to ensure that when the limit shaft abuts against the bottom surface of the limit block and the first end of the hanging plate rotates away from the electromagnet, the limit block will not hinder the limit shaft from rotating toward the electromagnet.
7. The electromagnetic actuator for a cut-off valve according to claim 1, characterized in that: The middle part of the hanging plate is rotatably connected to the bracket via a rotating shaft, the bracket is fixedly connected to the rotating shaft, and the rotating shaft is rotatably matched with the hanging plate via a bearing.