Throttling exhaust device for reducing pressure intensity of water hammer

Abstract

The utility model provides a throttling exhaust device for reducing the pressure intensity of a water hammer, which relates to the technical field of dry type fire hydrant systems, is arranged on a water filling tail end pipe section of a fire hydrant system pipe network, and comprises a quick exhaust assembly and a throttling exhaust assembly, the rapid exhaust assembly is located at the upstream position of the throttling exhaust assembly. When the fire hydrant system is filled with water in an empty pipe, the quick exhaust assembly at the upstream position has small exhaust resistance, the requirement for high-speed exhaust of a pipeline can be met, quick exhaust is achieved during water filling, and the throttling exhaust assembly at the downstream position has large exhaust resistance, so that a section of air bag is formed at the tail end of the pipe section. Through buffering of the air bag, additional pressure generated by the water hammer can be effectively reduced, and pipeline facilities are protected.

Description

Technical Field

[0001] The utility model relates to the technical field of dry fire hydrant systems, and particularly relates to a throttling exhaust device for reducing water hammer pressure. Background Art

[0002] To solve the problem of water freezing in fire pipelines in alpine regions in winter, electric tracing or dry fire hydrant systems are often used. In a dry fire hydrant system, there is no water in the pipeline usually. When there is a fire, water is quickly filled into the pipeline network behind the valve through an electric valve for fire fighting along the line. When the pipeline is filled with water, the gas in the pipeline is discharged through an exhaust valve. The fire fighting requirement is to fill the empty pipeline with water as soon as possible. However, when the high-speed water filling reaches the full pipe and the exhaust valve closes instantaneously, a closing water hammer will occur, resulting in an increase in the water pressure in the pipe and affecting the safety of pipeline facilities.

[0003] In the existing fire fighting system, the slow-closing check valve and water hammer eliminator required to be installed only serve as measures to eliminate the water hammer during pump shutdown, and cannot eliminate the water hammer occurring at the end of the system during the normal water filling process. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a throttling exhaust device for reducing water hammer pressure to solve the above technical problems existing in the prior art; the technical effects that can be produced by the preferred technical solutions provided by the utility model are described in detail below.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A throttling exhaust device for reducing water hammer pressure provided by the utility model is arranged on the water filling end pipe section of the fire hydrant system pipeline network, and comprises a quick exhaust assembly and a throttling exhaust assembly. The quick exhaust assembly is located upstream of the throttling exhaust assembly.

[0007] Preferably, the quick exhaust assembly comprises a first connecting pipe and a first quick exhaust valve, wherein: the first connecting pipe is vertically arranged; the first quick exhaust valve is connected to the first connecting pipe.

[0008] Preferably, the quick exhaust assembly comprises a first gate valve or butterfly valve, and the first gate valve or butterfly valve is arranged on the first connecting pipe.

[0009] Preferably, the throttling exhaust assembly comprises a second connecting pipe, a pressure reducing member and a second quick exhaust valve, wherein: the second connecting pipe is vertically arranged; the second quick exhaust valve is connected to the second connecting pipe through the pressure reducing member.

[0010] Preferably, the pressure reducing member is set as a throttling orifice plate, wherein: a throttling hole is arranged on the throttling orifice plate; the aperture of the throttling hole is smaller than the inner diameter of the second connecting pipe.

[0011] Preferably, the throttling exhaust assembly includes a second gate valve or butterfly valve, wherein: the second gate valve or butterfly valve is arranged on the second communication pipe; the orifice plate is connected and arranged between the second gate valve or butterfly valve and the second quick exhaust valve.

[0012] Preferably, the second gate valve or butterfly valve, the orifice plate and the second quick exhaust valve are flange-connected.

[0013] Preferably, when the fire hydrant system pipe network is a tree-shaped pipe network, both the quick exhaust assembly and the throttling exhaust assembly are arranged on the water filling end pipe section of the tree-shaped pipe network.

[0014] Preferably, when the fire hydrant system pipe network is a ring-shaped pipe network, both the quick exhaust assembly and the throttling exhaust assembly are arranged on the water filling end pipe section of the ring-shaped pipe network; the number of the quick exhaust assemblies is set to two, and the two quick exhaust assemblies are arranged on both sides of the throttling exhaust assembly.

[0015] Preferably, the throttling exhaust device for reducing water hammer pressure includes a short pipe, wherein: one end of the short pipe is communicated and arranged on the water filling end pipe section of the fire hydrant system pipe network, and the other end of the short pipe is plugged and arranged; the quick exhaust assembly and the throttling exhaust assembly are arranged on the short pipe.

[0016] The throttling exhaust device for reducing water hammer pressure provided by the present utility model has at least the following beneficial effects:

[0017] The throttling exhaust device for reducing water hammer pressure is arranged on the water filling end pipe section of the fire hydrant system official website, and includes a quick exhaust assembly and a throttling exhaust assembly. The quick exhaust assembly and the throttling exhaust assembly cooperate with each other to eliminate water hammer during the water filling of the empty pipe; the quick exhaust assembly is located upstream of the throttling exhaust assembly. During the water filling of the empty pipe, the quick exhaust assembly quickly exhausts air to ensure the quick water filling of the empty pipe. The throttling exhaust assembly has a large exhaust resistance and exhausts air slowly. In this way, an air bag can be formed at the water filling end of the pipe network. Through the buffering effect of the air bag, the additional pressure generated by the water hammer can be effectively eliminated, and the damage caused by the water hammer to the fire hydrant system can be avoided. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of the present utility model;

[0020] Figure 2 It is an enlarged view of part A of the present utility model;

[0021] Figure 3 It is an enlarged view of part B of the present utility model;

[0022] Figure 4 It is a schematic structural diagram of the throttle orifice plate of the present utility model;

[0023] Figure 5 It is a schematic structural diagram of an embodiment of the present utility model;

[0024] Figure 6 It is a schematic structural diagram of another embodiment of the present utility model;

[0025] Figure 7 It is a schematic structural diagram of yet another embodiment of the present utility model.

[0026] Reference numerals

[0027] 1. Fire hydrant system pipe network; 11. Branch pipe network; 12. Ring pipe network; 2. Quick exhaust assembly; 21. First connecting pipe; 22. First quick exhaust valve; 23. First gate valve or butterfly valve; 3. Throttle exhaust assembly; 31. Second connecting pipe; 32. Second quick exhaust valve; 33. Throttle orifice plate; 331. Throttle orifice; 34. Second gate valve or butterfly valve; 4. Short pipe; 41. Plug. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present utility model without any creative efforts fall within the scope protected by the present utility model.

[0029] Embodiment 1:

[0030] The present utility model provides a throttle exhaust device for reducing water hammer pressure, as Figures 1 to 4 shown, the throttle exhaust device for reducing water hammer pressure is arranged on the water filling end pipe section of the fire hydrant system pipe network 1; the water filling end refers to the position that is finally reached during the water filling process of the pipeline.

[0031] The throttle exhaust device for reducing water hammer pressure includes a quick exhaust assembly 2 and a throttle exhaust assembly 3, and the quick exhaust assembly 2 is located upstream of the throttle exhaust assembly 3.

[0032] When the air pipe is filled with water, the quick exhaust assembly 2 located in the upstream position can meet the requirements of high-speed exhaust of the pipeline, realizing quick exhaust during water filling. The throttling exhaust assembly 3 located in the downstream position has a greater exhaust resistance and exhausts slowly, forming an air bag at the end of the pipe section. Through the buffering of the air bag, the additional pressure generated by water hammer can be effectively reduced, protecting the pipeline facilities.

[0033] As an optional implementation manner, the quick exhaust assembly 2 includes a first connecting pipe 21 and a first quick exhaust valve 22. The first connecting pipe 21 is vertically arranged, and the first quick exhaust valve 22 is connected to the first connecting pipe 21.

[0034] Adopting a vertically installed quick exhaust valve can effectively ensure that the internal floating ball is in a vertical state, thus effectively ensuring its exhaust effect.

[0035] As an optional implementation manner, the quick exhaust assembly 2 includes a first gate valve or butterfly valve 23, and the first gate valve or butterfly valve 23 is arranged on the first connecting pipe 21.

[0036] When the first quick exhaust valve 22 needs to be overhauled, the first gate valve or butterfly valve 23 can effectively ensure the airtightness of the system and prevent water from flowing out.

[0037] The first gate valve or butterfly valve 23 is provided with a first flange, the first quick exhaust valve 22 is provided with a second flange, and the first gate valve or butterfly valve 23 and the first quick exhaust valve 22 are flange-connected.

[0038] As an optional implementation manner, the throttling exhaust assembly 3 includes a second connecting pipe 31, a pressure reducing member, and a second quick exhaust valve 32.

[0039] The second connecting pipe 31 is vertically arranged, and the second quick exhaust valve 32 is connected to the second connecting pipe 31 through the pressure reducing member.

[0040] The pressure reducing member has the function of throttling and pressure reducing, can provide a greater exhaust resistance, and is beneficial to the formation of an air bag at the end of the pipe section.

[0041] As an optional implementation manner, the pressure reducing member is set as a throttling orifice plate 33. A throttling orifice 331 is penetrated through the center position of the throttling orifice plate 33, and the aperture of the throttling orifice 331 is smaller than the inner diameter of the second connecting pipe 31.

[0042] The pressure reducing member adopts a throttling orifice plate 33, which has a simple structure and low cost on the basis of ensuring the throttling and pressure reducing effect.

[0043] As an optional implementation manner, the throttling exhaust assembly 3 includes a second gate valve or butterfly valve 34, and the second gate valve or butterfly valve 34 is arranged on the second connecting pipe 31; the throttling orifice plate 33 is connected and arranged between the second gate valve or butterfly valve 34 and the second quick exhaust valve 32.

[0044] When maintenance of the second quick exhaust valve 32 is required, the second gate valve or butterfly valve 34 can effectively ensure the airtightness of the system and prevent water from flowing out.

[0045] As an alternative embodiment, the second gate valve or butterfly valve 34 is provided with a third flange, the second quick exhaust valve 32 is provided with a fourth flange, and a plurality of flange holes are uniformly arranged along the circumference of the throttle orifice 331 on the throttle orifice plate 33. The second gate valve or butterfly valve 34, the throttle orifice plate 33, and the second quick exhaust valve 32 are flange-connected.

[0046] In the actual application process, if the pipe network is large, the throttle exhaust assembly 3 can also adopt a small-sized quick exhaust valve.

[0047] Embodiment 2

[0048] Embodiment 2 is based on Embodiment 1:

[0049] As Figure 5 shown, when the fire hydrant system pipe network 1 is a branched pipe network 11, both the quick exhaust assembly 2 and the throttle exhaust assembly 3 are arranged on the water filling end pipe section of the branched pipe network 11. Among them, both the first connecting pipe 21 and the second connecting pipe 31 are vertically connected and arranged on the water filling end pipe section of the branched pipe network 11, and the first connecting pipe 21 is located upstream of the second connecting pipe 31.

[0050] Embodiment 3

[0051] Embodiment 3 is based on Embodiment 1:

[0052] As Figure 6 shown, when the fire hydrant system pipe network 1 is a ring-shaped pipe network 12, both the quick exhaust assembly 2 and the throttle exhaust assembly 3 are arranged on the water filling end pipe section of the ring-shaped pipe network 12. Among them, both the first connecting pipe 21 and the second connecting pipe 31 are vertically connected and arranged on the water filling end pipe section of the ring-shaped pipe network 12.

[0053] In this embodiment, since the pipe network is ring-shaped, the number of quick exhaust assemblies 2 is set to two. The two quick exhaust assemblies 2 are arranged on both sides of the throttle exhaust assembly 3, and both sides of the throttle exhaust assembly 3 are its upstream.

[0054] Embodiment 4

[0055] Embodiment 4 is based on Embodiment 1:

[0056] As Figure 7 shown, the throttle exhaust device for reducing water hammer pressure includes a short pipe 4. One end of the short pipe 4 is connected and arranged on the water filling end pipe section of the fire hydrant system pipe network 1, and a plug 41 is arranged at the other end of the short pipe 4, which can effectively block the short pipe 4.

[0057] The quick exhaust assembly 2 and the throttle exhaust assembly 3 are arranged on the short pipe 4, wherein the first connecting pipe 21 and the second connecting pipe 31 are both vertically and communicatively arranged on the short pipe 4.

[0058] This embodiment is mainly directed at pipe networks with unclear internal water flow directions.

[0059] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.

[0060] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality" and "several" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0061] In the present application, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0062] As described above, only the specific embodiments of the present utility model are provided, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A throttling exhaust device for reducing water hammer pressure, characterized in that: It is arranged on the water-filled terminal pipe section of the fire hydrant system pipe network, and includes a quick exhaust component and a throttling exhaust component, wherein the quick exhaust component is located upstream of the throttling exhaust component.

2. The throttling exhaust device for reducing water hammer pressure according to claim 1, characterized in that: The quick exhaust assembly comprises a first connecting pipe and a first quick exhaust valve, wherein: The first connecting pipe is arranged vertically; The first quick exhaust valve is connected to the first connecting pipe.

3. The throttling exhaust device for reducing water hammer pressure according to claim 2, characterized in that: The quick exhaust assembly includes a first gate valve or a butterfly valve, and the first gate valve or the first butterfly valve is arranged on the first connecting pipe.

4. The throttling exhaust device for reducing water hammer pressure according to claim 1, characterized in that: The throttling exhaust assembly includes a second connecting pipe, a pressure reducing member and a second quick exhaust valve, wherein: The second connecting pipe is arranged vertically; The second quick exhaust valve is connected to the second connecting pipe through the pressure reducing member.

5. The throttling exhaust device for reducing water hammer pressure according to claim 4, characterized in that: The pressure reducing member is configured as a throttling orifice plate, wherein: The throttle orifice plate is provided with a throttle hole; The aperture of the throttling hole is smaller than the inner diameter of the second connecting pipe.

6. The throttling exhaust device for reducing water hammer pressure according to claim 5, characterized in that: The throttling exhaust assembly includes a second gate valve or a butterfly valve, wherein: The second gate valve or butterfly valve is arranged on the second connecting pipe; The throttling orifice is connected and arranged between the second gate valve or the butterfly valve and the second quick exhaust valve.

7. The throttling exhaust device for reducing water hammer pressure according to claim 6, characterized in that: The second gate valve or butterfly valve, the throttling orifice plate and the second quick exhaust valve are flange-connected.

8. The throttling exhaust device for reducing water hammer pressure according to claim 1, characterized in that: When the fire hydrant system pipe network is a branch-shaped pipe network, the quick exhaust component and the throttling exhaust component are both arranged on the water-filled terminal pipe section of the branch-shaped pipe network.

9. The throttling exhaust device for reducing water hammer pressure according to claim 1, characterized in that: When the fire hydrant system pipe network is a ring-shaped pipe network, the quick exhaust assembly and the throttling exhaust assembly are both arranged on the water-filled end pipe section of the ring-shaped pipe network; The number of the quick exhaust assemblies is set to two, and the two quick exhaust assemblies are arranged on both sides of the throttling exhaust assembly.

10. The throttling exhaust device for reducing water hammer pressure according to claim 1, characterized in that: The throttling exhaust device for reducing water hammer pressure includes a short pipe, wherein: One end of the short pipe is connected to the water filling terminal pipe section of the fire hydrant system pipe network, and the other end of the short pipe is sealed; The quick exhaust assembly and the throttle exhaust assembly are arranged on the short pipe.

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