Internal pressure automatic closing type hydrant structure capable of preventing water hammer

Abstract

The utility model discloses an internal pressure automatic closing type hydrant structure capable of preventing a water hammer, and mainly relates to the field of safety protection of hydrants. Comprising a valve chamber, the bottom of the valve chamber is communicated with a water inlet pipe, a support is arranged in the valve chamber, a valve plug is slidably connected to the support in the vertical direction, a top cover is movably connected to the top of the valve chamber, a safety valve cavity is formed in the valve plug, and a pressure relief hole is formed in the side wall of the safety valve cavity and located above the valve plug; a piston is slidably connected into the safety valve cavity in the vertical direction, and an elastic assembly is arranged between the piston and the top of the safety valve cavity. The utility model has the beneficial effects that the technical problem that the hydrant and the pipeline are easily damaged by the water hammer phenomenon can be solved, the phenomenon that the pressure of the water delivery pipeline and the hydrant exceeds the set or designed pressure is prevented, and the irrigation equipment such as the hydrant is prevented from being damaged due to excessive pressure such as the water hammer; automatic pressure relief is ensured when a limited pressure value is exceeded, and the integrity of the hydrant and the pipeline is protected.

Description

Technical Field

[0001] The utility model relates to the field of water faucet protection, in particular to an internal pressure automatic closing type water faucet structure which can prevent water hammer. Background Art

[0002] The existing buried water faucets can rely on the buoyancy of water in the water faucet to automatically drive the valve plug to slide upward to close the water faucet, so that the water faucet maintains good airtightness when not in use. However, when the water pump starts and stops or the valve of the water faucet is suddenly opened and closed, the water flow velocity and pressure in the water faucet fluctuate greatly, which can easily cause water hammer, easily causing serious damage to the water faucet and water supply pipeline, greatly increasing the failure rate of the water faucet and reducing the service life of the water faucet. Utility Model Content

[0003] The purpose of the utility model is to provide an internal pressure automatic closing water faucet structure which is anti-water hammer, and can solve the technical problem that water hammer phenomenon easily causes damage to water faucets and pipelines, prevent the phenomenon that water supply pipelines and water faucets exceed the set or design pressure, avoid water faucets and other irrigation equipment from being damaged by excessive pressure such as "water hammer", ensure automatic pressure relief when the pressure exceeds the specified value, and protect the integrity of water faucets and pipelines.

[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] An internal pressure automatic closing water faucet structure that prevents water hammer, comprises a valve chamber, the bottom of the valve chamber is connected to a water inlet pipe, a bracket is arranged in the valve chamber, a valve plug for controlling the opening and closing of the valve chamber is vertically slidably connected to the bracket, a top cover is movably connected to the top of the valve chamber, a safety valve cavity is provided on the valve plug, a pressure relief hole is provided on the side wall of the safety valve cavity, the pressure relief hole is located above the valve plug, a through hole is provided at the bottom of the safety valve cavity, a piston is vertically slidably connected to the inside of the safety valve cavity, and an elastic component is provided between the piston and the top of the safety valve cavity.

[0006] Furthermore, the elastic component is a spring, and the through hole is provided with a limiting step used in conjunction with the piston.

[0007] Furthermore, a sliding hole is provided on the bracket, and a guide column is provided at the bottom of the valve plug, and the guide column passes through the sliding hole and is slidably connected thereto.

[0008] Furthermore, the guide column is a tubular structure, and the guide column is fixed to the bottom of the safety valve cavity and is connected to the through hole.

[0009] Furthermore, a valve cap is movably connected to the top of the safety valve chamber, an exhaust hole is provided on the valve cap, and an air inlet and outlet hole is provided on the top cover.

[0010] Furthermore, a sealing ring is provided between the valve plug and the valve chamber.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The structure of the utility model is that a safety valve cavity is arranged on the valve plug in the valve chamber, and a pressure relief hole is arranged on the side wall of the safety valve cavity, and the pressure relief hole is located above the valve plug. In such a structure, when the valve plug slides upward to close the valve chamber, if water hammer occurs due to the start and stop of the water pump or the sudden closing of the valve, the water will flow into the safety valve cavity along the through hole at the bottom of the safety valve cavity and be discharged from the pressure relief hole, thereby reducing the water pressure in the water faucet, greatly reducing the damage to the water faucet and the water pipeline caused by the water hammer phenomenon, improving the integrity of the water faucet and the pipeline, reducing the failure rate, and increasing the service life of the water faucet and the pipeline;

[0013] 2. A piston is vertically slidably connected in the safety valve chamber, and an elastic component is provided between the piston and the top of the safety valve chamber. Such a structure enables the piston to be located below the pressure relief hole for a long time under the action of the elastic component, thereby keeping the pressure relief hole isolated from the water inlet pipe below, avoiding water leakage from the water hydrant. When water hammer occurs, the high-pressure water flow automatically drives the piston to slide upward toward the pressure relief hole, so that the pressure relief hole is partially or fully opened, thereby automatically realizing the pressure relief operation of the water flow. The structure is simple, and the pressure relief response to the water flow is faster and more efficient, which greatly improves the effect of safety protection for the water hydrant. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Attached Figure 2 It is a front view of the utility model.

[0016] Attached Figure 3 It is the attachment of the utility model Figure 2 Cross-sectional view along the AA direction.

[0017] Attached Figure 4 It is the attachment of the utility model Figure 3 Cross-sectional view along the BB direction.

[0018] Numbers shown in the accompanying drawings:

[0019] 1. Valve chamber; 2. Water inlet pipe; 3. Bracket; 4. Valve plug; 5. Top cover; 6. Safety valve chamber; 7. Pressure relief hole; 8. Through hole; 9. Piston; 10. Spring; 11. Limit step; 12. Sliding hole; 13. Guide column; 14. Valve cap; 15. Exhaust hole; 16. Inlet and outlet holes; 17. Sealing ring. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0021] See attached Figure 1 and 2 The utility model is an internal pressure automatic closing water faucet structure that prevents water hammer. The main structure includes a valve chamber 1, which is the main part of the water faucet. The bottom of the valve chamber 1 is welded or integrally formed with a water inlet pipe 2, and water flows into the valve chamber 1 from the water inlet pipe 2. A bracket 3 is welded or bolted in the valve chamber 1, and a valve plug 4 for controlling the opening and closing of the valve chamber 1 is vertically slidably connected to the bracket 3. Under the buoyancy of the water flow in the valve chamber 1, the valve plug 4 automatically rises to the top of the valve chamber 1, and the valve chamber 1 is automatically closed by the contact between the valve plug 4 and the top side wall of the valve chamber 1, so that when the water faucet is not used, the valve plug 4 can be automatically closed. It is automatically closed when in use to avoid water leakage. No additional operation is required. The structure is simple and it is particularly suitable for use in underground water faucets. The top of the valve chamber 1 is movably connected with a top cover 5, which can be specifically connected by a snap-on or threaded connection. The setting of the top cover 5 can protect the valve chamber 1 to prevent dirt and other impurities from entering the valve chamber 1 when the water faucet is not in use. When the water faucet is in use, the top cover 5 is opened, and the water outlet pipe with a valve is installed on the valve chamber 1. The valve presses down the piston 9 to achieve the opening operation of the valve chamber 1. A safety valve chamber 6 is provided on the valve plug 4, and the safety valve chamber 6 is welded or integrally formed and arranged on the valve The center position of the plug 4 is provided with a through pressure relief hole 7 on the side wall of the safety valve chamber 6, and the pressure relief hole 7 is located above the valve plug 4. A through through hole 8 is provided at the bottom of the safety valve chamber 6. When water hammer occurs in the water hydrant, water can enter the safety valve chamber 6 through the through hole 8 at the bottom, and be discharged from the pressure relief hole 7 to the top of the valve plug 4, thereby realizing effective drainage of the pressure in the water hydrant, ensuring the balance of the pressure inside and outside the water hydrant, avoiding damage to the water hydrant and the water pipeline, reducing the failure rate, and greatly improving the service life. A piston 9 is vertically slidably connected to the safety valve chamber 6, and the piston 9 An elastic component is provided between the piston 9 and the top of the safety valve chamber 6. Under the action of the elastic component, the piston 9 is at the bottom of the safety valve chamber 6, so that the pressure relief hole 7 is isolated from the water inlet pipe 2 below, avoiding water leakage when the water tap is closed. When water hammer occurs in the water tap, the water flows automatically through the through hole 8 to act on the piston 9, driving it to slide upward, compressing the elastic component to realize automatic pressure relief operation. After the pressure relief is completed, the piston 9 automatically descends under the action of the elastic component to close the pressure relief hole 7, making the pressure relief response to the water tap faster and more accurate, without the need for manual operation, thereby greatly improving the protection effect of the water tap.

[0022] Preferably, see Attachment Figure 3 The elastic component is a spring 10, and a limiting step 11 is welded or integrally formed at the through hole 8 and is fixed to cooperate with the piston 9. The spring 10 has a simple structure and low cost, and can fully meet the requirements of sliding and resetting the piston 9. At the same time, the setting of the limiting step 11 can effectively limit the position of the piston 9, ensuring the timeliness of the subsequent upward sliding response of the piston 9.

[0023] Preferably, the bracket 3 is provided with a penetrating sliding hole 12, and a guide column 13 is welded or bolted to the bottom of the valve plug 4. The guide column 13 passes through the sliding hole 12 and is slidably connected thereto. Such a structure utilizes the cooperation of the sliding hole 12 and the guide column 13 to achieve accurate guidance of the valve plug 4 to slide up and down, making the sliding structure of the valve plug 4 more stable and ensuring the sealing effect of closing the water supply pipe.

[0024] Preferably, see Attachment Figure 4 The guide column 13 is a tubular structure, which is fixed at the bottom of the safety valve chamber 6 and connected to the through hole 8. Such a structure enables the hollow guide column 13 to not only guide the up and down sliding of the valve plug 4, but also enables the water to smoothly pass through the hollow structure into the through hole 8, so that the through hole 8 coincides with the guide column 13 of the pipe pile, which simplifies the complexity of the structure and reduces the difficulty of manufacturing the structure.

[0025] Preferably, a valve cap 14 is movably connected to the top of the safety valve chamber 6, which can be specifically connected by a thread or a snap-on connection. The valve cap 14 is provided with a through exhaust hole 15, so that when the piston 9 slides upward in the safety valve chamber 6, the air in the safety valve chamber 6 can be quickly discharged from the exhaust hole 15, thereby avoiding the internal compression of the gas therein to hinder the sliding of the piston 9, thereby ensuring the smoothness of the sliding of the piston 9. The top cover 5 is provided with an air inlet and outlet hole 16. The setting of the air inlet and outlet hole 16 allows the decompressed gas or water to be discharged smoothly through the air inlet and outlet holes 16 of the top cover 5, thereby ensuring the smoothness of the overall pressure relief.

[0026] Preferably, a sealing ring 17 is provided between the valve plug 4 and the valve chamber 1. The sealing ring 17 is annular. When the valve plug 4 slides upward and contacts the valve chamber 1, the setting of the sealing ring 17 can improve the sealing effect of the contact between the two, and further ensure the airtightness of the water faucet closure.

[0027] Working principle: The structure of the utility model is provided with a safety valve chamber 6 on the valve plug 4 in the valve chamber 1, and a pressure relief hole 7 is provided on the side wall of the safety valve chamber 6, and the pressure relief hole 7 is located above the valve plug 4. With such a structure, when the valve plug 4 slides upward to close the valve chamber 1, if water hammer occurs due to the start and stop of the water pump or the sudden closing of the valve, the water will flow into the safety valve chamber 6 along the through hole 8 at the bottom of the safety valve chamber 6 and be discharged from the pressure relief hole 7, thereby reducing the water pressure in the water faucet, greatly reducing the damage to the water faucet and the water pipeline caused by the water hammer phenomenon, improving the integrity of the water faucet and the pipeline, reducing the failure rate, and improving the water faucet and the pipeline. Service life: A piston 9 is vertically slidably connected to the safety valve chamber 6, and an elastic component is provided between the piston 9 and the top of the safety valve chamber 6. Such a structure enables the piston 9 to be located below the pressure relief hole 7 for a long time under the action of the elastic component, thereby keeping the pressure relief hole 7 isolated from the water inlet pipe 2 below, avoiding water leakage from the water hydrant. When water hammer occurs, the high-pressure water flow automatically drives the piston 9 to slide upward toward the pressure relief hole 7, so that the pressure relief hole 7 is partially or fully opened, thereby automatically realizing the pressure relief operation of the water flow. The structure is simple, and the pressure relief response to the water flow is faster and more efficient, which greatly improves the effect of safety protection of the water hydrant.

Claims

1. An internal pressure automatic closing type water faucet structure for preventing water hammer, comprising a valve chamber (1), the bottom of the valve chamber (1) is connected to a water inlet pipe (2), a bracket (3) is arranged in the valve chamber (1), a valve plug (4) for controlling the opening and closing of the valve chamber (1) is vertically slidably connected to the bracket (3), and a top cover (5) is movably connected to the top of the valve chamber (1), characterized in that: The valve plug (4) is provided with a safety valve chamber (6), a pressure relief hole (7) is provided on the side wall of the safety valve chamber (6), and the pressure relief hole (7) is located above the valve plug (4). A through hole (8) is provided at the bottom of the safety valve chamber (6). A piston (9) is vertically slidably connected in the safety valve chamber (6), and an elastic component is provided between the piston (9) and the top of the safety valve chamber (6).

2. According to claim 1, the internal pressure automatic closing type water faucet structure against water hammer is characterized by: The elastic component is a spring (10), and the through hole (8) is provided with a limiting step (11) used in conjunction with the piston (9).

3. The internal pressure automatic closing type water faucet structure against water hammer according to claim 1, characterized in that: The bracket (3) is provided with a sliding hole (12), and the bottom of the valve plug (4) is provided with a guide column (13), and the guide column (13) passes through the sliding hole (12) and is slidably connected thereto.

4. The internal pressure automatic closing type water faucet structure against water hammer according to claim 3, characterized in that: The guide column (13) is a tubular structure, and the guide column (13) is fixed to the bottom of the safety valve chamber (6) and is connected to the through hole (8).

5. The internal pressure automatic closing type water faucet structure against water hammer according to claim 1, characterized in that: The top of the safety valve chamber (6) is movably connected to a valve cap (14), the valve cap (14) is provided with an exhaust hole (15), and the top cover (5) is provided with an air inlet and outlet hole (16).

6. The internal pressure automatic closing type water faucet structure against water hammer according to claim 1, characterized in that: A sealing ring (17) is provided between the valve plug (4) and the valve chamber (1).

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