Sectional pressure reduction fire hydrant

Abstract

The utility model discloses a fire hydrant capable of reducing pressure in sections, which belongs to the technical field of fire hydrants and comprises a hydrant body, a water outlet pipe is arranged on the side portion of the hydrant body, and a front baffle is fixedly connected with an inner cavity of the water outlet pipe. According to the utility model, when water flow in the inner cavity of the hydrant body flows into the inner cavity of the water inlet / outlet pipe, the water flow is subjected to primary pressure reduction through the cooperation of the water outlet pipe inner cavity front baffle plate, the front outflow orifice, the front piston supporting seat, the first spring, the front piston ring, the front water passing channel and the front piston inclined end surface; water flow is subjected to secondary pressure reduction through cooperation of a water outlet pipe inner cavity rear baffle, a rear outflow orifice, a rear piston supporting seat, a second spring, a rear piston ring, a rear water passing channel and a rear piston inclined end face, and the water pressure is reduced and stabilized to the required water pressure value through two times of pressure reduction. And the problem that the service life of the fire hydrant is affected due to the fact that large pressure is brought to the pressure reducing device due to the large one-time pressure reducing degree is solved, and the practicability of the fire hydrant with the segmented pressure reducing function is improved.

Description

Technical Field

[0001] This utility model relates to the field of fire hydrant technology, and more specifically, to a fire hydrant with segmented pressure reduction. Background Technology

[0002] A segmented pressure-reducing fire hydrant refers to a fire hydrant that can automatically adjust its pressure at different levels to ensure that the outlet water pressure remains within a safe range. Specifically, a pressure-reducing and pressure-stabilizing indoor fire hydrant is a typical application example. This type of hydrant achieves pressure reduction and stabilization through an internally installed automatic throttling device, typically located at the inlet and outlet of the hydrant. It controls the pressure at the inlet and outlet by changing the throttling area. However, existing pressure-reducing and pressure-stabilizing fire hydrants only use a single pressure-reducing device to lower the water pressure to the required level. When the incoming water pressure is high, the pressure-reducing device is subjected to significant pressure, affecting the hydrant's service life. Therefore, we propose a segmented pressure-reducing fire hydrant. Utility Model Content

[0003] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a fire hydrant with segmented pressure reduction.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] A segmented pressure-reducing fire hydrant includes a hydrant body, a water outlet pipe on the side of the hydrant body, a front baffle fixedly connected to the inner cavity of the water outlet pipe, two front outflow orifices on the front baffle, a rear baffle fixedly connected to the inner cavity of the water outlet pipe, two rear outflow orifices on the rear baffle, a front piston support fixedly connected to the inner wall of the water outlet pipe, a first spring fixedly connected to the inner wall of the front piston support, a front piston ring fixedly connected to the end of the first spring, the front piston ring movably sleeved on the inner side of the front piston support, a front water passage provided at one end of the front piston support, a front piston inclined end face provided at the other end of the front piston support, a rear piston support fixedly connected to the inner wall of the water outlet pipe, a second spring fixedly connected to one end of the inner cavity of the rear piston support, a rear piston ring fixedly connected to the end of the second spring, the rear piston ring sleeved on the inner cavity of the rear piston support, a rear water passage provided at one end of the rear piston ring, and a rear piston inclined end face provided at the other end of the rear piston ring.

[0006] In a preferred embodiment of this utility model, the inner diameter of the front water passage is larger than the inner diameter of the rear water passage.

[0007] As a preferred embodiment of this utility model, a water inlet pipe is provided at the bottom of the plug body, and a connecting flange is fixedly connected to the bottom end of the water inlet pipe.

[0008] As a preferred embodiment of this utility model, a valve stem is provided on the plug body, the bottom end of the valve stem extends into the inner cavity of the plug body and is fixedly connected to an opening and closing element, and a handwheel is fixedly connected to the top end of the valve stem.

[0009] As a preferred embodiment of this utility model, the end of the water outlet pipe is provided with a pipe joint.

[0010] In a preferred embodiment of this utility model, the outer side of one end of the front piston ring is in contact with the inner wall of one end of the front piston support, and the outer side of the other end of the front piston ring is in contact with the inner wall of the front piston support.

[0011] In a preferred embodiment of this utility model, the outer side of one end of the rear piston ring is in contact with the inner wall of one end of the rear piston support, and the outer side of the other end of the rear piston ring is in contact with the inner wall of the rear piston support.

[0012] The advantages of this utility model are:

[0013] In this invention, when water flows into the inner cavity of the hydrant's internal cavity, the water flow is subjected to initial pressure reduction through the cooperation of the front baffle, front outlet orifice, front piston support, first spring, front piston ring, front water passage, and front piston inclined end face of the inner cavity of the outlet pipe. A second pressure reduction is then applied through the cooperation of the rear baffle, rear outlet orifice, rear piston support, second spring, rear piston ring, rear water passage, and rear piston inclined end face of the inner cavity of the outlet pipe. These two pressure reductions stabilize the water pressure to the required value, avoiding the problem of excessive pressure on the pressure-reducing device caused by a large initial pressure reduction, which would affect its service life and improve the practicality of this segmented pressure-reducing fire hydrant. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the present invention;

[0016] Figure 3 This is a cross-sectional schematic diagram of the front piston ring of this utility model;

[0017] Figure 4 This is a cross-sectional schematic diagram of the rear piston ring of this utility model.

[0018] Explanation of the labels in the diagram:

[0019] 1. Valve body; 2. Outlet pipe; 3. Front baffle; 4. Front outlet orifice; 5. Rear baffle; 6. Rear outlet orifice; 7. Front piston support seat; 8. First spring; 9. Front piston ring; 10. Front water passage; 11. Front piston bevel face; 12. Rear piston support seat; 13. Second spring; 14. Rear piston ring; 15. Rear water passage; 16. Rear piston bevel face; 17. Inlet pipe; 18. Connecting flange; 19. Valve stem; 20. Opening and closing element; 21. Handwheel; 22. Pipe joint. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example:

[0024] Please see Figure 1-4A segmented pressure-reducing fire hydrant includes a hydrant body 1, a water outlet pipe 2 disposed on the side of the hydrant body 1, a front baffle 3 fixedly connected to the inner cavity of the water outlet pipe 2, two front outflow orifices 4 disposed on the front baffle 3, a rear baffle 5 fixedly connected to the inner cavity of the water outlet pipe 2, two rear outflow orifices 6 disposed on the rear baffle 5, a front piston support seat 7 fixedly connected to the inner wall of the water outlet pipe 2, a first spring 8 fixedly connected to the inner wall of the front piston support seat 7, a front piston ring 9 fixedly connected to the end of the first spring 8, and the front piston ring 9 movably sleeved on the front piston support seat 7. Inside the pipe, a front water passage 10 is provided at one end of the front piston support 7, and a front piston inclined end face 11 is provided at the other end of the front piston support 7. A rear piston support 12 is fixedly connected to the inner wall of the water outlet pipe 2. A second spring 13 is fixedly connected to one end of the inner cavity of the rear piston support 12. A rear piston ring 14 is fixedly connected to the end of the second spring 13. The rear piston ring 14 is sleeved in the inner cavity of the rear piston support 12. A rear water passage 15 is provided at one end of the rear piston ring 14, and a rear piston inclined end face 16 is provided at the other end of the rear piston ring 14.

[0025] For details, please refer to Figure 3 and Figure 4 The inner diameter of the front water passage 10 is larger than the inner diameter of the rear water passage 15.

[0026] In this embodiment, the water pressure is gradually reduced through the front water passage 10 and the rear water passage 15.

[0027] For details, please refer to Figure 1 and Figure 2 The bottom of the nut body 1 is provided with a water inlet pipe 17, and the bottom end of the water inlet pipe 17 is fixedly connected with a connecting flange 18.

[0028] In this embodiment, the fire hydrant and the fire pipeline are connected by the connecting flange 18.

[0029] For details, please refer to Figure 2 A valve stem 19 is provided on the valve body 1. The bottom end of the valve stem 19 extends into the inner cavity of the valve body 1 and is fixedly connected to an opening and closing element 20. A handwheel 21 is fixedly connected to the top end of the valve stem 19.

[0030] In this embodiment, the fire hydrant is opened and closed by the cooperation of the valve stem 19, the opening and closing part 20 and the handwheel 21.

[0031] For details, please refer to Figure 1 The end of the water outlet pipe 2 is equipped with a pipe joint 22.

[0032] In this embodiment, the fire hydrant and the fire hose are connected by the pipe joint 22.

[0033] For details, please refer to Figure 3The outer side of one end of the front piston ring 9 is in contact with the inner wall of one end of the front piston support 7, and the outer side of the other end of the front piston ring 9 is in contact with the inner wall of the front piston support 7.

[0034] In this embodiment, the sealing between the front piston ring 9 and the front piston support 7 is ensured so that the water in the outlet pipe 2 can only flow through the inner cavity of the front water passage 10.

[0035] For details, please refer to Figure 4 The outer side of one end of the rear piston ring 14 is in contact with the inner wall of one end of the rear piston support seat 12, and the outer side of the other end of the rear piston ring 14 is in contact with the inner wall of the rear piston support seat 12.

[0036] In this embodiment, the sealing between the rear piston ring 14 and the rear piston support seat 12 is ensured so that the water in the outlet pipe 2 can only flow through the inner cavity of the rear water passage 15.

[0037] Working principle: In use, firstly, rotating the handwheel 21 drives the valve stem 19 and the opening / closing element 20 to rotate. The upward movement of the opening / closing element 20 allows water from the inlet pipe 17 to enter the valve body 1. Then, the water inside the valve body 1 flows through the front outlet orifice 4 on the front baffle 3 and out through the front water passage 10 at the center of the front piston ring 9. The water pressure at the outlet exerts a thrust on the front piston inclined end face 11 at the end of the front piston ring 9. When the outlet pressure of the front piston inclined end face 11 reaches the set value, the thrust overcomes the elastic force of the first spring 8, pushing the front piston ring 9 towards the front baffle 3. The flow gap between the front baffle 3 and the front piston ring 9 decreases, reducing the flow rate and outlet pressure. When the outlet pressure of the front piston inclined end face 11 drops to the set value, the elastic force of the first spring 8 becomes greater than the water pressure at the end of the front piston inclined end face 11, pushing the front piston ring 9 back to its original position. The flow gap between the front baffle 3 and the front piston ring 9 increases, increasing the flow rate and outlet pressure. Then, the water, after being depressurized once, flows out through the rear outlet orifice 6 on the rear baffle 5 and the rear water passage 15 in the center of the rear piston ring 14. The water pressure at the outlet will generate a thrust on the rear piston inclined end face 16 at the end of the rear piston ring 14. When the outlet pressure of the rear piston inclined end face 16 reaches the set value, the thrust will overcome the elastic force of the second spring 13 and push the rear piston ring 14 to move closer to the rear baffle 5. The flow gap between the rear baffle 5 and the rear piston ring 14 becomes smaller, the flow rate decreases, and the outlet pressure decreases. When the outlet pressure of the rear piston inclined end face 16 drops to the set value, the elastic force of the second spring 13 will be greater than the water pressure at the end of the rear piston inclined end face 16, pushing the rear piston ring 14 back to its original position. The flow gap between the rear baffle 5 and the rear piston ring 14 becomes larger, the flow rate increases, and the outlet pressure increases. At the same time, the water flow is depressurized twice. Finally, the water after the second depressurization is discharged from the fire hose connected to the pipe joint 22 to achieve fire extinguishing.

[0038] In addition, based on the above principle, multiple pressure reducing devices can be installed in the inner cavity of the water outlet pipe 2 to achieve segmented pressure reduction.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A segmented pressure-reducing fire hydrant, comprising a hydrant body (1), characterized in that: The side of the plug (1) is provided with a water outlet pipe (2). A front baffle (3) is fixedly connected to the inner cavity of the water outlet pipe (2). Two front outflow orifices (4) are provided on the front baffle (3). A rear baffle (5) is fixedly connected to the inner cavity of the water outlet pipe (2). Two rear outflow orifices (6) are provided on the rear baffle (5). A front piston support seat (7) is fixedly connected to the inner wall of the water outlet pipe (2). A first spring (8) is fixedly connected to the inner wall of the front piston support seat (7). A front piston ring (9) is fixedly connected to the end of the first spring (8). The front piston ring (9) is movably sleeved on the inner side of the front piston support seat (7). A front piston support seat (7) is provided with a front water passage (10) at one end and a front piston inclined end face (11) at the other end. A rear piston support seat (12) is fixedly connected to the inner wall of the water outlet pipe (2). A second spring (13) is fixedly connected to one end of the inner cavity of the rear piston support seat (12). A rear piston ring (14) is fixedly connected to the end of the second spring (13). The rear piston ring (14) is sleeved in the inner cavity of the rear piston support seat (12). A rear water passage (15) is provided at one end of the rear piston ring (14). A rear piston inclined end face (16) is provided at the other end of the rear piston ring (14).

2. The fire hydrant with segmented pressure reduction according to claim 1, characterized in that: The inner diameter of the front water passage (10) is larger than the inner diameter of the rear water passage (15).

3. A fire hydrant with segmented pressure reduction according to claim 1, characterized in that: The bottom of the plug body (1) is provided with a water inlet pipe (17), and the bottom end of the water inlet pipe (17) is fixedly connected with a connecting flange (18).

4. A fire hydrant with segmented pressure reduction according to claim 1, characterized in that: A valve stem (19) is provided on the plug body (1). The bottom end of the valve stem (19) extends into the inner cavity of the plug body (1) and is fixedly connected to an opening and closing element (20). A handwheel (21) is fixedly connected to the top end of the valve stem (19).

5. A fire hydrant with segmented pressure reduction according to claim 1, characterized in that: The end of the water outlet pipe (2) is provided with a pipe joint (22).

6. A fire hydrant with segmented pressure reduction according to claim 1, characterized in that: The outer side of one end of the front piston ring (9) is in contact with the inner wall of one end of the front piston support (7), and the outer side of the other end of the front piston ring (9) is in contact with the inner wall of the front piston support (7).

7. A fire hydrant with segmented pressure reduction according to claim 1, characterized in that: The outer side of one end of the rear piston ring (14) is in contact with the inner wall of one end of the rear piston support (12), and the outer side of the other end of the rear piston ring (14) is in contact with the inner wall of the rear piston support (12).

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