A spray valve with switchable spray pressure

Abstract

The present invention provides a flushing valve with switchable flushing pressure, which relates to the field of flushing valves and includes a valve body, a hollow valve core, a first spring and a rear end cover. A one-way direct injection assembly is provided at the tail end of the hollow valve core. The one-way direct injection assembly includes a valve seat, a one-way valve plate, a guide shaft and a second spring. The flushing valve forms two stages as water flows through the water supply pipe. In the first stage, normal pressure water flows along the front chamber, the middle chamber, the inside of the hollow valve core and finally sprays out through the direct injection port to penetrate the soil outside the valve body. When high-pressure water is introduced into the water supply pipe, the flushing valve enters the second stage. At this time, the injection port slides to the outside of the valve body, and the high-pressure water sequentially passes through the front chamber, the middle chamber, the inside of the hollow valve core, and sprays out from the injection port at high pressure to wash the outer wall of the pile shoe. When the flushing valve is in the first stage, since the normal pressure water sprays out from the direct injection port, the soil layer outside the valve body can be loosened, so that the hollow valve core can easily extend the flushing hole out of the valve body, effectively ensuring the flushing work.

Description

Technical Field

[0001] The present invention relates to the field of flushing valves, and in particular to a flushing valve with switchable flushing pressure. Background Art

[0002] A conventional flushing valve connects the water inlet of the valve body to a high-pressure flushing water pipe. During operation, high-pressure water pushes the hollow valve core to extend the flushing orifice to the working position. At this time, the return spring is compressed, and at the same time, the sealing pair of the hollow valve core is opened. The high-pressure water passes through the inner channel of the hollow valve core and sprays out through 4 flushing orifices to wash and disturb the sediment adhering to the surface of the pile shoe, reducing the adsorption force of the sediment on the pile shoe to facilitate pile pulling. When the high-pressure water is closed and depressurized, the hollow valve core quickly resets and retracts into the valve body under the action of the return spring and seawater pressure, and the sealing pair closes to prevent sediment and seawater from flowing back into the valve body cavity. This type of flushing valve is commonly used at the pile shoe of a jack-up drilling platform. The main reason why the lower part of the pile shoe adheres to the formation clay is that the water inside it is completely squeezed out, creating a pressure difference with seawater, and the pile shoe is "pressed" to the seabed by seawater. Therefore, as long as the pressure balance is achieved or the pressure difference is reduced, the pile leg can be pulled out. To achieve this goal, it depends on the flushing valve on the pile shoe. However, according to the article "Discussion on Pile Pulling of Jack-up Platform with Pile Shoe" by the Drilling Division of China National Offshore Oil Corporation, if high-pressure water is directly used for flushing, the loose clay blocked at the flushing orifice will be instantly compressed, the pores will be completely filled, and seawater cannot seep out, ultimately causing the flushing to lose its effectiveness and making it even more difficult to pull out the pile leg. Therefore, the method of normal pressure penetration is adopted first. However, the existing structure of the flushing valve limits the switching between normal pressure water and high-pressure water, and when the external soil layer is relatively hard, it is difficult for the hollow valve core to directly extend the flushing orifice out of the valve body, resulting in difficulties in carrying out the flushing work. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a flushing valve with switchable flushing pressure.

[0004] The present invention is realized through the following technical solutions:

[0005] A spray valve with switchable spray pressure includes a valve body, a hollow valve core, a first spring, and a rear end cover. The middle part of the valve body is separated by an annular clamping table with a central opening into a through front cavity, a middle cavity, and a rear cavity. The front cavity is externally connected to a water supply pipe. The front end of the hollow valve core and the annular clamping table form a seal pair that can be opened and closed. The rear end cover is installed at the end of the rear cavity. The hollow valve core is located in the rear cavity. The first spring is sleeved on the hollow valve core, and both ends of the first spring respectively abut against the hollow valve core and the rear end cover. The hollow valve core has a sliding rod part that is inserted and connected to the rear end cover. Multiple groups of spray ports perpendicular to the central axis of the sliding rod part are equiangularly arranged at the rear of the sliding rod part. The spray ports are connected to the water supply pipe through the inside of the hollow valve core, the rear cavity, the middle cavity, and the front cavity. A one-way direct spray assembly is provided at the end of the sliding rod part. A direct spray port is provided at the end of the sliding rod part. The central axis of the direct spray port coincides with the central axis of the sliding rod part. A valve cavity for accommodating the one-way direct spray assembly is provided on the front side of the direct spray port. The one-way direct spray assembly includes a valve seat, a one-way valve plate, a guide shaft, and a second spring. The valve seat is fixedly installed in the valve cavity, and the one-way valve plate is slidably connected to the valve seat through the guide shaft. The second spring is sleeved on the guide shaft, and the second spring pushes the one-way valve plate against the inlet of the valve cavity. The spray valve forms two stages as water passes through the water supply pipe. In the first stage, normal pressure water enters the spray valve. The normal pressure water pushes the hollow valve core to open initially. Under the pushing action of the first spring, the spray ports have not yet slid to the outside, and the normal pressure water pushes the one-way direct spray assembly at the end of the hollow valve core to open. The normal pressure water is directly sprayed to the outside from the spray ports. In the second stage, high-pressure water enters the spray valve. The high-pressure water pushes the hollow valve core to slide quickly into place. The first spring is compressed under force. The spray ports slide to the outside of the valve body. The high-pressure water passes through the front cavity, the middle cavity, the inside of the hollow valve core in sequence, and is sprayed out from the spray ports at high pressure.

[0006] According to the above technical solution, preferably, multiple groups of one-way direct spray assemblies are equiangularly arranged on the valve body. The one-way direct spray assemblies are connected to the front part of the rear cavity through connection channels. A sealing plate for opening and closing the connection channels is provided on the hollow valve core. The spray valve forms two stages as water passes through the water supply pipe. In the first stage, normal pressure water enters the spray valve. The normal pressure water pushes the hollow valve core to open initially. Under the pushing action of the first spring, the spray ports have not yet slid to the outside, and the normal pressure water pushes the one-way direct spray assembly at the end of the hollow valve core and the one-way direct spray assemblies in the valve body to open. The normal pressure water is directly sprayed to the outside from the spray ports. In the second stage, high-pressure water enters the spray valve. The high-pressure water pushes the hollow valve core to slide quickly into place. The first spring is compressed under force. The spray ports slide to the outside of the valve body. The sealing plate of the hollow valve core closes the inlet of the connection channels. The high-pressure water passes through the front cavity, the middle cavity, the inside of the hollow valve core in sequence, and is sprayed out from the spray ports at high pressure.

[0007] According to the above technical solution, preferably, a lubricating mechanism is further included. The lubricating mechanism includes a liquid storage chamber, a constant pressure component, and a liquid guiding pipe. The liquid storage chamber is arranged inside the valve body and is communicated with the telescopic area of the first spring through the liquid guiding pipe. The constant pressure component is arranged inside the liquid storage chamber, and the constant pressure component includes a pressing plate and a third spring. The third spring pushes the pressing plate. When the flushing valve works, the first spring is compressed by force, the telescopic area shrinks, and the lubricating oil in the telescopic area is squeezed into the liquid storage chamber. When the flushing valve stops working, the third spring pushes the pressing plate, and the lubricating oil in the liquid storage chamber is squeezed into the telescopic area.

[0008] According to the above technical solution, preferably, the rear end cover is detachably connected to the tail end of the rear cavity through threads.

[0009] According to the above technical solution, preferably, a rotating mechanism is further included. The rotating mechanism drives the hollow valve core to rotate under the action of high-pressure water.

[0010] According to the above technical solution, preferably, the rotating mechanism includes a turbine component. The turbine component is fixedly arranged at the front end of the hollow valve core, and the turbine component is located inside the middle cavity. High-pressure water enters the valve body through the water supply pipe, the high-pressure water drives the turbine component to rotate, and the turbine component drives the hollow valve core to rotate synchronously.

[0011] The beneficial effects of the present invention are as follows:

[0012] (1) The flushing valve of the present invention forms two stages as water passes through the water supply pipe. In the first stage, the normal-pressure water flows along the front cavity, the middle cavity, the inside of the hollow valve core, and finally sprays out through the direct spray port, penetrating the soil outside the valve body. After a certain period of time, high-pressure water is introduced into the water supply pipe, causing the flushing valve to enter the second stage. At this time, the spray port slides to the outside of the valve body, and the high-pressure water sequentially passes through the front cavity, the middle cavity, the inside of the hollow valve core, and sprays out from the spray port at high pressure to wash the outer wall of the pile shoe.

[0013] (2) In the first stage of the flushing valve of the present invention, since the normal-pressure water sprays out from the direct spray port, it can loosen the soil layer outside the valve body, enabling the hollow valve core to easily extend the flushing hole out of the valve body, effectively ensuring the flushing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Shows an isometric structural schematic diagram according to an embodiment of the present invention;

[0015] Figure 2 Shows a top view structural schematic diagram according to an embodiment of the present invention;

[0016] Figure 3 Shows Figure 2 a cross-sectional structural schematic diagram in the A-A direction of

[0017] Figure 4 Shows Figure 3Schematic diagram of the detailed structure of local C;

[0018] Figure 5 Shows an isometric side structure diagram of a hollow valve core according to an embodiment of the present invention;

[0019] Figure 6 Shows a cross-sectional structure diagram of the valve body;

[0020] Explanation of reference numerals:

[0021] 1. Valve body; 2. Hollow valve core; 3. First spring; 4. Rear end cover; 5. Front cavity channel; 6. Middle cavity channel; 7. Rear cavity channel; 8. Slide rod part; 9. Injection port; 10. Unidirectional direct injection assembly; 11. Direct injection port; 12. Valve cavity; 13. Valve seat; 14. Check valve plate; 15. Guide shaft; 16. Second spring; 17. Connection channel; 18. Sealing plate; 19. Lubrication mechanism; 20. Liquid storage bin; 21. Constant pressure assembly; 22. Liquid guide pipe; 23. Pressing plate; 24. Third spring; 25. Turbine component. Detailed implementation manners

[0022] In order to enable those skilled in the art of the present technology to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and the best embodiments. Based on the embodiments in the invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the invention.

[0023] In the description of the invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the invention 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 therefore should not be construed as a limitation to the invention.

[0024] Embodiment 1

[0025] As shown in the figure, this embodiment provides a flushing valve with switchable flushing pressure, which includes a valve body 1, a hollow valve core 2, a first spring 3 and a rear end cover 4. The flushing valve is installed on the pile shoe. The middle part of the valve body 1 is separated into a through front cavity 5, a middle cavity 6 and a rear cavity 7 by an annular clamping platform with a middle opening. The front cavity 5 is externally connected to a water supply pipe. The front end of the hollow valve core 2 and the annular clamping platform form a seal pair that can be opened and closed. The rear end cover 4 is detachably threadedly connected to the tail end of the rear cavity 7. The hollow valve core 2 is located in the rear cavity 7. The first spring 3 is sleeved on the hollow valve core 2, and both ends of the first spring 3 respectively abut against the hollow valve core 2 and the rear end cover 4. The hollow valve core 2 has a slide rod portion 8 that is inserted and connected to the rear end cover 4. Multiple groups of injection ports 9 perpendicular to the central axis of the slide rod portion 8 are arranged at equal angles at the rear of the slide rod portion 8. The injection ports 9 are connected to the water supply pipe through the inside of the hollow valve core 2, the rear cavity 7, the middle cavity 6 and the front cavity 5. In addition, a one-way direct injection assembly 10 is provided at the tail end of the slide rod portion 8. A direct injection port 11 is provided at the tail end of the slide rod portion 8. The central axis of the direct injection port 11 coincides with the central axis of the slide rod portion 8. A valve cavity 12 for accommodating the one-way direct injection assembly 10 is provided on the front side of the direct injection port 11. The one-way direct injection assembly 10 includes a valve seat 13, a one-way valve plate 14, a guide shaft 15 and a second spring 16. The valve seat 13 is fixedly installed in the valve cavity 12, and the one-way valve plate 14 is slidably connected to the valve seat 13 through the guide shaft 15. The second spring 16 is sleeved on the guide shaft 15, and the second spring 16 pushes the one-way valve plate 14 to abut against the inlet of the valve cavity 12.

[0026] Working process: The flushing valve forms two stages as water flows through the water supply pipe;

[0027] In the first stage, normal-pressure water is introduced into the flushing valve. The normal-pressure water pushes the hollow valve core 2 to open initially. Under the pushing action of the first spring 3, the injection ports 9 have not yet slid to the outside, while the normal-pressure water pushes the one-way direct injection assembly 10 at the tail end of the hollow valve core 2 to open, and the normal-pressure water is directly sprayed to the outside from the injection ports 9;

[0028] In the second stage, high-pressure water is introduced into the flushing valve. The high-pressure water pushes the hollow valve core 2 to slide quickly in place. The first spring 3 is compressed under force, and the injection ports 9 slide to the outside of the valve body 1. The high-pressure water sequentially passes through the front cavity 5, the middle cavity 6, the inside of the hollow valve core 2, and is sprayed out from the injection ports 9 under high pressure.

[0029] The above-mentioned jet flushing valve forms two stages as water flows through the water supply pipe. In the first stage, atmospheric pressure water flows along the front cavity 5, middle cavity 6, and inside the hollow valve core 2 and finally sprays out through the direct spray port 11, permeating the soil outside the valve body 1. After a certain period of time, high-pressure water is introduced into the water supply pipe, causing the jet flushing valve to enter the second stage. At this time, the spray port 9 slides outside the valve body 1. The high-pressure water sequentially passes through the front cavity 5, middle cavity 6, and inside the hollow valve core 2, and sprays out from the spray port 9 under high pressure to scour the outer side wall of the pile shoe. When the jet flushing valve is in the first stage, since the atmospheric pressure water sprays out from the direct spray port 11, it can loosen the soil layer outside the valve body 1, enabling the hollow valve core 2 to easily extend the jet punching hole outside the valve body 1, effectively ensuring the jet flushing work.

[0030] Embodiment 2

[0031] As shown in the figure, based on Embodiment 1, this embodiment is provided with multiple groups of one-way direct spray components 10 at equal angles on the valve body 1. The one-way direct spray components 10 are connected and communicated with the front part of the rear cavity 7 through the connection channel 17. A sealing plate 18 for opening and closing the connection channel 17 is provided on the hollow valve core 2. The jet flushing valve forms two stages as water flows through the water supply pipe. In the first stage, atmospheric pressure water is introduced into the jet flushing valve. The atmospheric pressure water pushes the hollow valve core 2 to open initially. Under the pushing action of the first spring 3, the spray port 9 has not yet slid to the outside, while the atmospheric pressure water pushes the one-way direct spray components 10 at the tail end of the hollow valve core 2 and the one-way direct spray components 10 inside the valve body 1 to open, and the atmospheric pressure water sprays directly to the outside from the spray port 9. In the second stage, high-pressure water is introduced into the jet flushing valve. The high-pressure water pushes the hollow valve core 2 to slide quickly into place. The first spring 3 is compressed under force, and the spray port 9 slides outside the valve body 1. The sealing plate 18 of the hollow valve core 2 closes the inlet of the connection channel 17. The high-pressure water sequentially passes through the front cavity 5, middle cavity 6, and inside the hollow valve core 2, and sprays out from the spray port 9 under high pressure. By adding multiple groups of one-way direct spray components 10 to the valve body in this embodiment, the jet flushing range can be increased, and when high-pressure jet flushing is required, the multiple groups of one-way direct spray components 10 on the valve body 1 can be closed by the impact of high-pressure water.

[0032] Embodiment 3

[0033] As shown in the figure, based on Embodiment 1 and / or Embodiment 2, this embodiment further includes a lubrication mechanism 19. The lubrication mechanism 19 includes a liquid storage bin 20, a constant pressure component 21, and a liquid guide pipe 22. The liquid storage bin 20 is arranged inside the valve body 1 and is communicated with the telescopic area of the first spring 3 through the liquid guide pipe 22. The constant pressure component 21 is arranged in the liquid storage bin 20, and the constant pressure component 21 includes a pressing plate 23 and a third spring 24. The third spring 24 pushes the pressing plate 23. When the jet flushing valve works, the first spring 3 is compressed under force, the telescopic area shrinks, and the lubricating oil in the telescopic area is squeezed into the liquid storage bin 20. When the jet flushing valve stops working, the third spring 24 pushes the pressing plate 23, and the lubricating oil in the liquid storage bin 20 is squeezed into the telescopic area. The lubrication mechanism can greatly reduce the frictional resistance when the hollow valve core 2 slides.

[0034] Example 4

[0035] As shown in the figure, on the basis of Embodiment 1, Embodiment 2 or Embodiment 3, this embodiment further includes a rotating mechanism. The rotating mechanism drives the hollow valve core 2 to rotate under the action of high-pressure water. The rotating mechanism includes a turbine component 25. The turbine component 25 is fixedly arranged at the front end of the hollow valve core 2, and the turbine component 25 is located in the middle cavity 6. High-pressure water enters the valve body 1 through the water supply pipe. The high-pressure water drives the turbine component 25 to rotate, and the turbine component 25 drives the hollow valve core 2 to rotate synchronously. By rotating the hollow valve core 2, the jet range of the jet valve can be enhanced.

[0036] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A flushing valve with switchable flushing pressure, characterized in that, It includes a valve body, a hollow valve core, a first spring and a rear end cover. The middle part of the valve body is separated into a through front cavity, a middle cavity and a rear cavity by an annular clamping table with a middle opening. The front cavity is externally connected to a water supply pipe. The front end of the hollow valve core and the annular clamping table form an openable and closable sealing pair. The rear end cover is installed at the tail end of the rear cavity. The hollow valve core is located in the rear cavity. The first spring is sleeved on the hollow valve core, and both ends of the first spring respectively abut against the hollow valve core and the rear end cover. The hollow valve core has a sliding rod part that is inserted and connected to the rear end cover. Multiple groups of spray ports perpendicular to the central axis of the sliding rod part are arranged at equal angles at the rear part of the sliding rod part. The spray ports are connected to the water supply pipe through the inside of the hollow valve core, the rear cavity, the middle cavity and the front cavity. A one-way direct injection assembly is arranged at the tail end of the sliding rod part. A direct injection port is arranged at the tail end of the sliding rod part. The central axis of the direct injection port coincides with the central axis of the sliding rod part. A valve cavity for accommodating the one-way direct injection assembly is arranged on the front side of the direct injection port. The one-way direct injection assembly includes a valve seat, a one-way valve plate, a guide shaft and a second spring. The valve seat is fixedly installed in the valve cavity, and the one-way valve plate is slidably connected to the valve seat through the guide shaft. The second spring is sleeved on the guide shaft. The second spring pushes the one-way valve plate to abut against the inlet of the valve cavity. The flushing valve forms two stages as water flows through the water supply pipe. In the first stage, normal pressure water enters the flushing valve. The normal pressure water pushes the hollow valve core to open initially. Under the pushing action of the first spring, the spray ports have not yet slid to the outside, while the normal pressure water pushes the one-way direct injection assembly at the tail end of the hollow valve core to open. The normal pressure water is directly sprayed to the outside from the spray ports. In the second stage, high-pressure water enters the flushing valve. The high-pressure water pushes the hollow valve core to slide quickly in place. The first spring is compressed under force. The spray ports slide to the outside of the valve body. The high-pressure water sequentially passes through the front cavity, the middle cavity, the inside of the hollow valve core, and is sprayed out from the spray ports at high pressure.

2. The jet valve with switchable jet pressure according to claim 1, characterized in that Multiple groups of one-way direct injection assemblies are arranged at equal angles on the valve body. The one-way direct injection assemblies are communicated with the front part of the rear cavity through connecting channels. A sealing plate for opening and closing the connecting channels is arranged on the hollow valve core. The flushing valve forms two stages as water flows through the water supply pipe. In the first stage, normal pressure water enters the flushing valve. The normal pressure water pushes the hollow valve core to open initially. Under the pushing action of the first spring, the spray ports have not yet slid to the outside, while the normal pressure water pushes the one-way direct injection assembly at the tail end of the hollow valve core and the one-way direct injection assemblies in the valve body to open. The normal pressure water is directly sprayed to the outside from the spray ports. In the second stage, high-pressure water enters the flushing valve. The high-pressure water pushes the hollow valve core to slide quickly in place. The first spring is compressed under force. The spray ports slide to the outside of the valve body. The sealing plate of the hollow valve core closes the inlet of the connecting channel. The high-pressure water sequentially passes through the front cavity, the middle cavity, the inside of the hollow valve core, and is sprayed out from the spray ports at high pressure.

3. The jet impact valve with switchable jet impact pressure according to claim 1, wherein, It further includes a lubrication mechanism, which includes a liquid storage chamber, a constant pressure component, and a liquid guide pipe. The liquid storage chamber is arranged in the valve body and is communicated with the telescopic area of the first spring through the liquid guide pipe. The constant pressure component is arranged in the liquid storage chamber, and the constant pressure component includes a pressing plate and a third spring. The third spring pushes the pressing plate. When the flushing valve works, the first spring is compressed by force, the telescopic area shrinks, and the lubricating oil in the telescopic area is squeezed into the liquid storage chamber. When the flushing valve stops working, the third spring pushes the pressing plate, and the lubricating oil in the liquid storage chamber is squeezed into the telescopic area.

4. The jet valve with switchable jet pressure according to claim 1, characterized in that, The rear end cover is detachably threadedly connected to the tail end of the rear cavity.

5. A flushing valve with switchable flushing pressure according to claim 1, characterized in that, It further includes a rotating mechanism, which drives the hollow valve core to rotate under the action of high-pressure water.

6. A jet valve with switchable jet pressure according to claim 5, characterized in that, The rotating mechanism includes a turbine component, which is fixedly arranged at the front end of the hollow valve core and is located in the middle cavity. High-pressure water enters the valve body through the water supply pipe, and the high-pressure water drives the turbine component to rotate. The turbine component drives the hollow valve core to rotate synchronously.

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