Signal head for fire-fighting signal butterfly valve

Abstract

The utility model discloses a signal head for a fire-fighting signal butterfly valve, which belongs to the technical field of valves and comprises a box body, an input shaft, a worm, a worm wheel and a travel switch, the input shaft is connected with the worm, the worm is mounted on the box body in a manner of rotating around an axis, the worm wheel is mounted in the box body and meshed with the worm, and the travel switch is connected with the worm. The turbine is provided with a switch contact, and is characterized in that the turbine has a front mounting state and a back mounting state which are horizontally and radially overturned, and in the two mounting states, the switch contact touches and presses the travel switch; and two ends of turbine teeth of the turbine are respectively meshed with the worm in two mounting states. The signal head not only is convenient to maintain and replace, but also remarkably improves the performance of the butterfly valve in various industrial applications by improving the reliability and the service life of a product, and becomes a more reliable, efficient and long-life signal output solution.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a signal head for a fire fighting signal butterfly valve. Background Art

[0002] The fire fighting signal butterfly valve has a simple structure and convenient operation, and is mainly composed of a main valve and a signal head. The main valve is installed on the fire fighting pipeline, responsible for controlling the valve position and outputting signals according to the opening degree of the valve. When the valve opening is too large, the output signal alarms to indicate that the flow rate is too large; when the valve opening is too small, the output signal alarms to indicate that the flow rate is too small. The output functions of these signals are mainly realized by the signal head. The signal head controls the opening and closing of the valve through a handwheel. During the opening and closing process of the valve, the turbine rotates, and the convex block on the turbine presses the travel switch, thereby outputting a position signal. These basic structures enable the fire fighting signal butterfly valve to accurately feedback the valve state and ensure that the fire fighting system can effectively control the flow rate and pressure of the fire fighting water in the pipeline.

[0003] At present, there are mainly two common types of signal heads for fire fighting signal butterfly valves in the market, which realize the output of open position and closed position signals through different internal structures. The first type of signal head is shown in the figure, and relies on the left - hand and right - hand rotation transformation of the worm and worm thread to complete the signal output. The second type of signal head is as Figures 3 - 4 , and realizes the signal output through the up - and - down contact transformation of the lead screw and the left - and - right position transformation of the travel switch. However, there are some problems and disadvantages in the design of these signal heads.

[0004] First of all, there are significant differences in the internal structures of different types of signal heads, which leads to the need to process different special components during the manufacturing process. For example, open - position feedback type and closed - position feedback type signal heads need to use different structural components to achieve their respective functions. This differential structure design not only increases the complexity of production, but also directly leads to an increase in manufacturing costs. At the same time, the non - universality of components limits the interchangeability of signal heads, increasing the difficulty of component management in enterprise production and maintenance. In addition, due to each signal head adopting a different design scheme, the inventory management of parts becomes more complex, and additional resources are required for maintenance and replacement.

[0005] The diversified design of signal heads restricts the standardization and mass production of similar products, not only increasing manufacturing costs, but also being unfavorable for reducing inventory management and maintenance costs. The complex internal structure design also makes the maintenance and replacement of signal heads more time - consuming and laborious, affecting the user experience and the long - term reliability of the equipment. Summary of the Utility Model

[0006] In view of the problems existing in the prior art, the present utility model provides a signal head for a fire protection signal butterfly valve, which solves the problems of high manufacturing cost, poor part universality, and limited standardization and batch production caused by the differential design of the valve signal head structure.

[0007] The present utility model is realized as follows: A signal head for a fire protection signal butterfly valve includes a box body, an input shaft, a worm, a turbine, and a travel switch. The input shaft is connected to the worm. The worm is installed in the box body in a manner of rotating around the axis. The turbine is installed in the box body and meshes with the worm. The turbine is provided with switch contacts. The characteristics are that: The turbine has a front mounting state and a reverse mounting state that are horizontally radially flipped. In the two mounting states, the switch contacts press the travel switch; in the two mounting states, both ends of the turbine teeth of the turbine mesh with the worm respectively.

[0008] In the above technical solution, preferably, a turbine installation cavity is provided in the box body. Shaft holes are provided on both sides of the turbine installation cavity. Radially symmetric shaft parts are provided on both sides of the turbine. The shaft parts are fitted into the shaft holes.

[0009] In the above technical solution, preferably, the shaft part includes a cylindrical outer shaft part and a central through hole penetrating the shaft part. A keyway is provided on the inner side of the central through hole.

[0010] In the above technical solution, preferably, the turbine can be flipped 180° along a horizontal plane parallel to the axis of the worm to realize the switching between the front mounting state and the reverse mounting state, and the keyway is flipped 180° along the horizontal plane during the switching process between the two states.

[0011] In the above technical solution, preferably, a box cover is installed on the upper part of the box body. The box cover is provided with an observation port for displaying the installation state of the turbine and the worm.

[0012] Advantages and effects:

[0013] This valve signal head adopts a standardized design concept, unifies all parts, and greatly simplifies the production and installation processes. Its core advantage lies in the mirror design of the turbine installation structure, which endows the signal head with two installation states, enables the switching of the left and right positions of the cam on the turbine, and thus easily converts the on-position or off-position signal output of the travel switch. This design not only simplifies the types of parts in the production link and reduces the management difficulty, but also provides great flexibility for later use.

[0014] In addition, the reliability of the signal head is significantly enhanced. The standardized design improves the versatility of components, reduces errors in manufacturing and maintenance, and extends the service life of the equipment. At the same time, this design improves the efficiency and accuracy of signal output, ensuring that the fire signal butterfly valve can more efficiently and stably control the water flow and pressure in the pipeline in complex industrial application environments. Overall, this signal head is not only easy to maintain and replace, but also significantly improves the performance of the butterfly valve in various industrial applications by enhancing the reliability and lifespan of the product, becoming a more reliable, efficient, and long-lasting signal output solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the signal head of the present utility model as an open position signal head;

[0016] Figure 2 is a schematic structural diagram of the signal head of the present utility model as a closed position signal head;

[0017] Figure 3 and Figure 4 is a schematic structural diagram of the existing signal head;

[0018] Figure 5 is a schematic structural diagram of the turbine in the signal head of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0020] To solve the problems of high manufacturing cost, poor part versatility, and limited standardized and batch production caused by the differential structure design of the valve signal head, the present utility model specifically provides a signal head for a fire signal butterfly valve. To further illustrate the structure of the present utility model, the following is a detailed description in conjunction with the drawings:

[0021] Please refer to Figure 1 、 Figure 2 and Figure 5, A valve signal head mounting structure mainly includes a box body 3, an input shaft 2, a worm 5, a turbine 6 and a travel switch 7. The input shaft is connected to the worm, and a handwheel 1 is installed at its outer end to transmit the externally input rotational motion to the worm. The worm is fixedly installed in the box body in a manner of rotating around its own axis. The worm meshes with the turbine, and the turbine is also installed in the box body to drive the action of the switch contacts through the rotation of the turbine. The travel switch is linked to the movement of the turbine. When the turbine rotates to a specific position, the travel switch is triggered, thereby sending a signal to feedback the position state of the valve. The core of the overall structure lies in the transmission between the worm and the turbine, and the precise feedback of the valve switch position is achieved by means of the travel switch.

[0022] The turbine has a front mounting state and a reverse mounting state with horizontal radial flipping. In the two mounting states, the switch contact 6-2 presses the travel switch. At both ends of the turbine teeth 6-1 of the turbine, they mesh with the worm respectively in the two mounting states. In this embodiment, the turbine is radially symmetric as a whole, including the turbine teeth and the circumferential convex structure of the travel switch contact. Further, a turbine mounting cavity is provided in the box body, shaft holes are provided on both sides of the turbine mounting cavity, and radially symmetric shaft portions 6-3 are provided on both sides of the turbine. The shaft portions are fitted into the shaft holes. The shaft portion includes a cylindrical outer shaft portion and a central through hole penetrating the shaft portion. A keyway 6-4 is provided inside the central through hole. The turbine can be flipped 180° along the horizontal plane parallel to the axis of the worm to realize the switching between the front mounting state and the reverse mounting state, and the keyway is flipped 180° along the horizontal plane during the switching process between the two states.

[0023] A box cover 4 is installed on the upper part of the box body, and the box cover is provided with an observation port for displaying the installation state of the turbine and the worm.

[0024] The mirror design of the turbine is adopted, and the appearances of the signal heads for open position feedback and closed position feedback are the same, and the internal parts are universal. Through the selective mirror installation of the turbine, the turbine contacts can press the travel switch left and right (switch positions) in the box body: when assembling the signal head, two different models of assembling for open position signal output and closed position signal output can be carried out according to needs, making the components completely universal, without the need for differential design and manufacturing, simplifying the design, enhancing the performance of the signal head, and reducing the production cost.

[0025] Generally speaking, the signal head with an integrated switch position design eliminates the differential work at the design end and realizes the required functions through assembly, significantly improving the performance and reliability of the butterfly valve in various industrial applications.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A signal head for a fire protection signal butterfly valve, comprising a box body, an input shaft, a worm, a turbine and a travel switch. The input shaft is connected to the worm. The worm is installed in the box body in a manner of rotating around the axis. The turbine is installed in the box body and meshes with the worm. The turbine is provided with switch contacts, and it is characterized in that: The turbine has a front-mounted state and a reverse-mounted state that are horizontally radially flipped. In the two mounting states, the switch contacts press the travel switch; at both ends of the turbine teeth of the turbine, they are respectively engaged with the worm in the two mounting states.

2. The signal head for a fire protection signal butterfly valve according to claim 1, wherein: A turbine mounting cavity is provided in the box body. Shaft holes are provided on both sides of the turbine mounting cavity. Radially symmetric shaft parts are provided on both sides of the turbine, and the shaft parts are fitted into the shaft holes.

3. The signal head for a fire fighting signal butterfly valve according to claim 2, characterized in that: The shaft part includes a cylindrical outer shaft part and a central through hole penetrating the shaft part. A keyway is provided inside the central through hole.

4. The signal head for the fire fighting signal butterfly valve according to claim 3, characterized in that: The turbine can be flipped 180° along a horizontal plane parallel to the axis of the worm to realize the switching between the front-mounted state and the reverse-mounted state, and the keyway is flipped 180° along the horizontal plane during the switching process between the two states.

5. The signal head for the fire protection signal butterfly valve according to claim 3, characterized in that: A box cover is installed on the upper part of the box body, and the box cover is provided with an observation port for displaying the installation state of the turbine and the worm.

Images