Fire pump valve for fire-fighting water supply system

Abstract

The embodiment of the utility model provides a fire pump valve for a fire-fighting water supply system, which comprises a valve body, a valve core, a valve rod, a hand wheel, a bearing seat and a transmission box, the valve element is arranged in the valve body and used for controlling opening and closing of water flow. One end of the valve rod is connected with the valve element, penetrates through the bearing seat and is used for transmitting the rotating motion of the hand wheel to the valve element so as to achieve opening and closing operation. The hand wheel is connected with the other end of the valve rod and used for providing rotation power, the bottom of the hand wheel is of a fan-shaped tooth structure so as to reduce rotational inertia, and anti-skid protrusions are arranged on the outer edge of the upper portion of the hand wheel so as to enhance the operation force conduction efficiency; the bearing seat is arranged above the valve body and used for supporting the valve rod and reducing friction force in the rotating process of the valve rod. And the transmission box is arranged at the joint of the valve rod and the hand wheel. Through the scheme of the embodiment of the invention, quick opening and closing can be adapted, and the operation torque is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fire engineering, in particular to a fire pump valve for a fire water supply system. BACKGROUND

[0002] The fire pump valve for a fire water supply system is a key component in the fire water supply system, mainly used to control the opening and closing of water flow in the pipeline, to ensure timely and stable water supply in the event of a fire. However, such valves face technical challenges in adapting to rapid opening and closing and reducing operating torque in actual application, especially in emergency operations. If the opening and closing speed is too slow or the required operating torque is too large, it may delay the fire rescue time and affect the overall performance and reliability of the system. SUMMARY

[0003] Therefore, the present application provides a fire pump valve for a fire water supply system to at least partially solve the problems in the prior art.

[0004] The fire pump valve for a fire water supply system of the present application comprises a valve body, a valve core, a valve stem, a hand wheel, a bearing seat and a transmission box, wherein:

[0005] The valve body is used to connect the fire water supply pipeline;

[0006] The valve core is arranged in the valve body and is used to control the opening and closing of water flow;

[0007] One end of the valve stem is connected to the valve core and passes through the bearing seat, and is used to transmit the rotary motion of the hand wheel to the valve core to realize opening and closing operation;

[0008] The hand wheel is connected to the other end of the valve stem and is used to provide rotary power, wherein the bottom of the hand wheel is a fan-shaped tooth structure to reduce the moment of inertia, and the outer edge of the upper part of the hand wheel is provided with anti-skid protrusions to enhance the operation force transmission efficiency;

[0009] The bearing seat is arranged above the valve body and is used to support the valve stem and reduce the friction during rotation;

[0010] The transmission box is arranged at the connection between the valve stem and the hand wheel.

[0011] In one specific embodiment, a spur gear structure is arranged on the valve stem, and the spur gear structure is meshed and connected with the fan-shaped tooth structure of the hand wheel.

[0012] In one specific embodiment, the hand anti-skid protrusions are arrayed conical protrusions, and the surface is covered with a wear-resistant rubber layer to increase the friction and durability.

[0013] In one embodiment, a thrust bearing is provided on the outer surface of the valve stem, and the thrust bearing is fixedly assembled with the bearing seat to reduce the axial rotation resistance of the valve stem.

[0014] In one embodiment, a radial guide groove is provided on the valve core, and the inner surface of the valve body has a convex structure, and the radial guide groove cooperates with the convex structure in the valve body to reduce the rotation deviation of the valve core.

[0015] In one embodiment, the radius of the fan-shaped tooth structure is greater than the radius of the straight gear structure to form an accelerator structure to achieve faster opening and closing actions.

[0016] In one embodiment, a torque limiting device is provided on the end of the valve stem close to the hand wheel, and the torque limiting device includes a protrusion fixed on the valve stem and a limiting block fixed on the bottom end of the transmission box, and the limiting block is located on the rotation path of the protrusion.

[0017] The fire pump valve for a fire water supply system provided by the embodiments of the present disclosure includes a valve body, a valve core, a valve stem, a hand wheel, a bearing seat, and a transmission box, wherein the valve body is used to connect a fire water supply pipeline; the valve core is arranged in the valve body and is used to control the opening and closing of water flow; one end of the valve stem is connected with the valve core and passes through the bearing seat, and is used to transmit the rotary motion of the hand wheel to the valve core to realize opening and closing operation; the hand wheel is connected with the other end of the valve stem and is used to provide rotary power, wherein the bottom of the hand wheel is a fan-shaped tooth structure to reduce the rotary inertia, and the outer edge of the upper part of the hand wheel is provided with an anti-skid protrusion to enhance the operation force transmission efficiency; the bearing seat is arranged above the valve body and is used to support the valve stem and reduce the friction during rotation; and the transmission box is arranged at the connection between the valve stem and the hand wheel. Through the scheme of the embodiments of the present disclosure, how to adapt to fast opening and closing and reduce the operation torque can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In the drawings, like reference numerals designate like elements or components throughout the several views, unless otherwise specified. The drawings are not necessarily to scale, the emphasis instead being placed upon illustrating the principles of the application. It should be understood that the drawings only depict some embodiments of the application and should not be considered limiting the scope of the application.

[0019] Figure 1 is a structural schematic view of the fire pump valve for a fire water supply system according to the present application;

[0020] Figure 2 is a bottom view of the fire pump valve for a fire water supply system according to the present application;

[0021] Figure 3It is the internal structure schematic view of the transmission box in the fire pump valve of the fire water supply system,

[0022] Figure 4 It is the structure schematic view of the connection relationship between the valve stem and the valve core in the fire pump valve of the fire water supply system,

[0023] Figure 5 It is the structure schematic view of the connection relationship between the valve stem and the valve core in the fire pump valve of the fire water supply system, Figure 1 The enlarged view of A in the middle.

[0024] In the figure: 1, valve body; 2, valve core; 3, valve stem; 4, hand wheel; 41, fan-shaped tooth structure; 42, anti-skid convex; 5, bearing seat; 6, transmission box; 7, straight gear structure; 8, wear-resistant rubber layer; 9, thrust bearing; 10, radial guide groove; 11, accelerator structure; 12, torque limiting device; 13, protruding block; 14, limiting block DETAILED DESCRIPTION

[0025] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be essentially exemplary rather than limiting.

[0026] As Figure 1 shown, the fire pump valve for fire water supply system of the application includes valve body 1, valve core 2, valve stem 3, hand wheel 4, bearing seat 5 and transmission box 6. These components jointly constitute a fire pump valve capable of adapting to rapid opening and closing and reducing operating torque requirements.

[0027] Valve body 1 is the main structure of the entire valve, which is designed to connect the fire water supply pipeline. In actual application, valve body 1 can be fixedly connected with the pipeline in the form of threads or flanges, and provides a passage for water flow through the internal cavity. In order to improve the sealing performance and durability, a wear-resistant sealing ring can be installed on the inner surface of valve body 1 or a high-temperature-resistant material can be used for manufacturing, so as to adapt to the high-pressure operation requirements of the fire water supply system.

[0028] Valve core 2 is arranged in valve body 1, which is used to control the opening and closing state of water flow by changing position. Valve core 2 is generally made of materials with high strength and corrosion resistance. In terms of technical implementation, conical or flat plate-shaped valve core 2 can be designed in combination with sealing ring structure, so that it is tightly matched with the flow passage in valve body 1, and can quickly switch between opening and closing states during rotation.

[0029] Valve stem 3 is connected with valve core 2, responsible for transmitting external rotary torque to valve core 2, thus completing the operation control of water flow. In order to realize stable transmission effect, valve stem 3 can be made of high-hardness steel material to withstand high-strength operating force. In addition, valve stem 3 is usually provided with a threaded end to facilitate reliable connection with valve core 2 or transmission components through threaded pair. At the same time, in some embodiments, anti-corrosion paint can be applied to the surface of valve stem 3 to further improve its durability.

[0030] Hand wheel 4 is installed at one end of valve stem 3, mainly providing driving power through human rotation, and is the key component directly controlled by the user. In order to meet the requirement of quick opening and closing and reduce the operating burden, the bottom of hand wheel 4 is provided with a fan-shaped tooth structure 41 (for details, see Figure 3 ), which can reduce the inertia during rotation, thereby more efficiently transmitting torque to valve stem 3. On the other hand, the outer edge of hand wheel 4 is arranged with anti-skid protrusions 42 structure (for details, see Figure 5 ), which not only enhances the stability when the user applies force, but also effectively improves the friction transmission performance. For example, a composite engineering plastic can be used to make the hand wheel 4 mask with elastic texture, so that it has both strength and comfort.

[0031] Bearing seat 5 is wrapped outside valve stem 3, mainly used to provide stable support while reducing the friction resistance during the rotation of valve stem 3. For this purpose, ball bearings or other similar low-friction elements can be configured inside bearing seat 5 to ensure smooth and smooth operation. At the same time, the material selection of bearing seat 5 itself should consider the performance requirements such as fireproof and waterproof, for example, stainless steel material can significantly enhance the overall reliability and service life.

[0032] Transmission box 6, as an important auxiliary structure, is located between hand wheel 4 and valve stem 3, providing assembly space for the internal transmission components, and also playing a protective function. The specific structure inside transmission box 6 can include gear reduction mechanism or multi-layer transmission component combination design, which accurately and effectively transmits the driving force generated by hand wheel 4 to valve stem 3 through the optimized transmission path, ensuring quick start or closing. In addition, additional sealing rings can be added to prevent foreign matter from entering and interfering with the transmission efficiency.

[0033] The above components and structures jointly solve the technical problem of how to adapt to quick opening and closing and reduce the operating torque. By adopting the unique fan-shaped tooth structure 41 design of hand wheel 4 and optimizing the transmission path, the requirement of manual force is significantly reduced under the premise of meeting the efficient start-up response speed; and the carefully laid bearing seat 5 guarantees the smoothness of the whole process from the physical level, reduces unnecessary energy loss and wear.

[0034] As Figure 3As shown in one embodiment, the hand wheel 4 of the fire pump valve of the fire water supply system of the present application is designed with a fan-shaped tooth structure 41 at the bottom. This structure is in mesh with the straight gear structure 7 on the valve stem 3, and the rotating torque provided by the hand wheel 4 is more efficiently transmitted to the valve stem 3 through mechanical transmission. Specifically, the fan-shaped tooth structure 41 is located at the bottom of the hand wheel 4, and its installation position accurately corresponds to the area of the straight gear structure 7 on the valve stem 3, and the two are in close mesh to ensure motion synchronization. The straight gear structure 7 is arranged on the valve stem 3 near the transmission box 6, and is integrally manufactured with the valve stem 3 to form a stable transmission assembly.

[0035] For example, first, the straight gear structure 7 is machined on the top of the valve stem 3, and the lower surface of the hand wheel 4 is shaped into a fan-shaped tooth to ensure that the two components can naturally mesh in the installed state. To improve accuracy, a numerical control machine tool can be used to process the tooth shape to meet the assembly requirements, ensuring that the torque is accurately and efficiently transmitted to the valve stem 3 to drive the valve core 2 to complete the opening and closing action.

[0036] As shown in one embodiment, the hand wheel 4 of the fire pump valve of the fire water supply system of the present application is designed with a fan-shaped tooth structure 41 at the bottom. This structure is in mesh with the straight gear structure 7 on the valve stem 3, and the rotating torque provided by the hand wheel 4 is more efficiently transmitted to the valve stem 3 through mechanical transmission. Specifically, the fan-shaped tooth structure 41 is located at the bottom of the hand wheel 4, and its installation position accurately corresponds to the area of the straight gear structure 7 on the valve stem 3, and the two are in close mesh to ensure motion synchronization. The straight gear structure 7 is arranged on the valve stem 3 near the transmission box 6, and is integrally manufactured with the valve stem 3 to form a stable transmission assembly. Figure 5 As shown in one embodiment, the hand wheel 4 of the fire pump valve of the fire water supply system of the present application is designed with a fan-shaped tooth structure 41 at the bottom. This structure is in mesh with the straight gear structure 7 on the valve stem 3, and the rotating torque provided by the hand wheel 4 is more efficiently transmitted to the valve stem 3 through mechanical transmission. Specifically, the fan-shaped tooth structure 41 is located at the bottom of the hand wheel 4, and its installation position accurately corresponds to the area of the straight gear structure 7 on the valve stem 3, and the two are in close mesh to ensure motion synchronization. The straight gear structure 7 is arranged on the valve stem 3 near the transmission box 6, and is integrally manufactured with the valve stem 3 to form a stable transmission assembly.

[0037] For example, the tapered protrusions with a predetermined height and density are pre-processed during the molding process of the hand wheel 4, and then the outer surface of the hand wheel 4 is precisely coated or wrapped with a layer of wear-resistant rubber material that meets the standard requirements, ensuring that the two are firmly combined. At the same time, the position of the tapered protrusions is strictly limited to the contact area on the outside of the hand wheel 4, which does not affect the assembly of the internal transmission structure, and can fully play the effect of anti-skid and wear resistance, forming a reliable user interface.

[0038] As shown in one embodiment, the hand wheel 4 of the fire pump valve of the fire water supply system of the present application is designed with a fan-shaped tooth structure 41 at the bottom. This structure is in mesh with the straight gear structure 7 on the valve stem 3, and the rotating torque provided by the hand wheel 4 is more efficiently transmitted to the valve stem 3 through mechanical transmission. Specifically, the fan-shaped tooth structure 41 is located at the bottom of the hand wheel 4, and its installation position accurately corresponds to the area of the straight gear structure 7 on the valve stem 3, and the two are in close mesh to ensure motion synchronization. The straight gear structure 7 is arranged on the valve stem 3 near the transmission box 6, and is integrally manufactured with the valve stem 3 to form a stable transmission assembly. Figure 4As shown in the drawings, in one embodiment, a thrust bearing 9 is externally added to the valve stem 3 of the fire pump valve of the fire water supply system of the application, and is fixed and assembled with the bearing seat 5 through a specific structure. The thrust bearing 9 is located externally on the valve stem 3 close to the bearing seat 5, and mainly functions to further reduce the resistance of the valve stem 3 when moving in the axial direction. Specifically, the thrust bearing 9 is tightly arranged in the peripheral area of the valve stem 3, and the bottom or side thereof is directly in contact with the bearing seat 5, thereby forming a stable assembly relationship therebetween. The thrust bearing 9 is usually composed of a main body having the ability to bear axial force, and is embedded into a predetermined slot hole in the bearing seat 5 through a protruding structure on the end face or side face, so as to achieve a reliable connection form.

[0039] For example, the assembly can be completed by the following manner: a standard thrust bearing 9 is preassembled to the outer periphery of the valve stem 3, and then is inserted into the positioning hole in the bearing seat 5, and the firm combination therebetween is ensured through tight fitting or locking ring and the like. Specifically, the bearing seat 5 can be designed with a limiting slot inside, so that the peripheral structure of the thrust bearing 9 can be just clamped therein, thereby achieving the requirements of accurate installation position and stable structure. In this way, during the opening and closing of the valve, the thrust bearing 9 can effectively share the axial load of the valve stem 3, thereby optimizing the transmission efficiency and operation performance.

[0040] As shown in the drawings, Figure 4 In one embodiment, a radial guide groove 10 is arranged on the valve core 2 of the fire pump valve of the fire water supply system of the application, and the position thereof is designed to match the internal structure of the valve body 1, so as to enhance the alignment accuracy of the valve core 2 in the valve body 1 and the stability during rotation. Specifically, the radial guide groove 10 is a groove structure arranged along the radial direction of the valve core 2, and has a regular geometric shape to adapt to the protruding structure of the inner surface of the valve body 1. Through the cooperation structure, the position relationship of the valve core 2 is limited, so that accurate alignment is maintained during the opening and closing operation, and the problem of rotation deviation is reduced.

[0041] For example, the radial guide groove 10 with uniform depth and smooth surface can be formed during the machining of the valve core 2, and the width and length thereof are precisely adjusted to accurately adapt to the protruding part inside the valve body 1 through precise measurement. When the valve core 2 is installed, the radial guide groove 10 needs to be precisely butted and locked with the protrusion on the inner wall of the valve body 1, so as to ensure the close combination therebetween. Meanwhile, in order to optimize the assembly efficiency, the valve core 2 can be stably pressed into the predetermined position of the valve body 1 after preliminary alignment is completed by using an auxiliary positioning tool. Finally, reliable cooperation is formed, thereby meeting the requirement of the system on the consistency of valve operation.

[0042] As shown in the drawings, Figure 3As shown in the drawings, in one embodiment, the hand wheel 4 of the fire pump valve of the fire water supply system of the present application is designed as a fan-shaped tooth structure 41 at the bottom, and cooperates with a straight tooth structure 7 in the transmission box 6. Through this design, the specification of the fan-shaped tooth structure 41 is larger than that of the straight tooth structure 7, and the difference in size enables the rotation torque to be amplified in the transmission process, thereby forming the effect of a hand accelerator. This structure allows the operator to complete the opening and closing control of the valve core 2 with less rotation stroke, while reducing the fatigue feeling in the process of manual operation.

[0043] Specifically, the fan-shaped tooth structure 41 is installed at the bottom of the hand wheel 4 and meshes with the straight tooth structure 7 inside the transmission box 6. By adjusting the number of teeth and the module of the two, the change of the manual acceleration ratio is realized under the premise of ensuring the meshing accuracy. In order to ensure the stability of the structure, the straight tooth structure 7 is fixed to the inner wall of the transmission box 6, and the fan-shaped tooth structure 41 driven by the hand wheel 4 transmits the opening and closing power when rotating relative to the straight tooth gear. From the perspective of technical implementation, for example, a larger module and a proper range of tooth number ratio (such as the number of teeth of the fan-shaped tooth is 1.5 times or more than the number of teeth of the straight tooth gear) can be selected to meet the technical requirement of accelerating the opening and closing action. In this configuration, the rotating action of the operator is transmitted to the valve stem 3 through the accelerator structure 11, significantly improving the transmission efficiency.

[0044] As shown in the drawings, Figure 2 and Figure 4 As shown in the drawings, in one embodiment, the valve stem 3 of the fire pump valve of the fire water supply system of the present application is provided with a torque limiting device 12 at one end close to the hand wheel 4. The device mainly includes a protrusion 13 fixed to the valve stem 3 and a limiting block 14 arranged at the bottom end of the transmission box 6, wherein the limiting block 14 is located in the rotation path of the protrusion 13. By reasonably setting the position and structural size of the protrusion 13 and the limiting block 14, when the valve stem 3 is subjected to an excessive torque, the protrusion 13 and the limiting block 14 come into contact, thereby realizing the mechanical limitation of the rotation angle of the valve stem 3, effectively avoiding the damage of the valve stem 3 or related components caused by excessive force during operation.

[0045] Specifically, the working principle of the torque limiting device 12 is based on the position and shape matching relationship between the protrusion 13 and the limiting block 14. For example, the protrusion 13 can be a fixed radial extension piece, which is firmly connected to the outer peripheral surface of the valve stem 3 and rotates with the valve stem 3; and the limiting block 14 is a stop surface with a certain length, which is fixed to the bottom of the transmission box 6. The relative space range between the two determines the critical value of the torque limitation. In technical implementation, different torque requirements can be met by adjusting the protrusion length of the protrusion 13 or the arrangement position of the limiting block 14. During installation, the protrusion 13 needs to be accurately fixed on the valve stem 3 and ensure synchronous rotation with the valve stem 3, and the limiting block 14 needs to be firmly assembled at the specified position of the transmission box 6 to ensure stable positioning effect.

[0046] In actual operation, when the device is in use, the valve rod 3 can be driven to rotate by rotating the hand wheel 4. The fan-shaped tooth structure 41 at the bottom of the hand wheel 4 helps to reduce the rotational inertia and improve the operation efficiency. Meanwhile, the anti-skid protrusions 42 on the outer edge of the hand wheel 4 can enhance the force transmission effect, ensuring that the rotation of the hand wheel 4 is more stable and reliable. The valve rod 3 further transmits the rotary motion transmitted by the hand wheel 4 to the valve core 2 through the transmission assembly, thereby driving the valve core 2 to open or close, so as to effectively control the water flow in the fire water supply pipeline. In this process, the bearing seat 5 is used to support the valve rod 3 and reduce the friction resistance during rotation, and the transmission box 6 provides a stable mounting position for the transmission assembly, so as to ensure the smoothness and reliability of the entire transmission process.

[0047] The above is the preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A fire pump valve for a fire service water supply system, characterised in that, The utility model relates to a valve for fire water supply pipeline, which comprises a valve body (1), a valve core (2), a valve rod (3), a hand wheel (4), a bearing seat (5) and a transmission box (6). The valve body (1) is used for connecting a fire water supply pipeline. The valve core (2) is arranged in the valve body (1) and is used for controlling the opening and closing of water flow. The valve rod (3) is connected to the valve core (2) at one end and passes through the bearing seat (5), and is used for transmitting the rotary motion of the hand wheel (4) to the valve core (2) to realize the opening and closing operation. The hand wheel (4) is connected to the other end of the valve rod (3) and is used for providing rotary power, wherein the bottom of the hand wheel (4) is provided with a fan-shaped tooth structure (41) to reduce the rotary inertia, and the outer edge of the upper part of the hand wheel (4) is provided with anti-skid protrusions (42) to enhance the operation force transmission efficiency. The bearing seat (5) is arranged above the valve body (1) and is used for supporting the valve rod (3) and reducing the friction during rotation. The transmission box (6) is arranged at the connection between the valve rod (3) and the hand wheel (4). The valve rod (3) is provided with a spur gear structure (7), and the spur gear structure (7) is meshed and connected with the fan-shaped tooth structure (41) of the hand wheel (4).

2. A fire pump valve for a fire service water supply system according to claim 1, characterised in that: The anti-skid protrusions (42) are arrayed conical protrusions, and the surface is covered with a wear-resistant rubber layer (8) to increase the friction and durability.

3. A fire pump valve for a fire service water supply system according to claim 1, characterized in that: The valve rod (3) is externally provided with a thrust bearing (9), and the thrust bearing (9) is fixedly assembled with the bearing seat (5) to reduce the axial rotation resistance of the valve rod (3).

4. A fire pump valve for a fire service water supply system according to claim 1, characterized in that: The valve core (2) is provided with a radial guide groove (10), and the inner surface of the valve body (1) has a protruding structure, and the radial guide groove (10) is matched with the protruding structure in the valve body (1) to reduce the rotation deviation of the valve core (2).

5. A fire pump valve for a fire service water supply system according to claim 1, characterized in that: The radius of the fan-shaped tooth structure is greater than that of the spur gear structure to form an accelerator structure (11) to realize faster opening and closing operation.

6. A fire pump valve for a fire service water supply system according to claim 1, characterized in that: The end of the valve rod (3) close to the hand wheel (4) is provided with a torque limiting device (12), which comprises a protrusion (13) fixed on the valve rod (3) and a limiting block (14) fixed at the bottom end of the transmission box (6), and the limiting block (14) is located in the rotation path of the protrusion (13).

7. A fire pump valve for a fire service water supply system according to claim 1, characterized in that: ​

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