A differential pressure driven self-cleaning showerhead and methods of use

Abstract

The application provides a differential pressure driven self-cleaning nozzle and a use method thereof, and particularly relates to the technical field of washing equipment. The nozzle comprises a valve body, a cover plate, a water supply pipe and a nozzle; the cover plate is detachably arranged on the top of the valve body; the nozzle is arranged on the bottom of the valve body; a piston is slidably arranged in the inner cavity of the valve body; the water outlet end of the water supply pipe penetrates through the cover plate and extends downward into the piston chamber; a filter plate is horizontally arranged in the middle of the piston chamber, and the filter plate divides the piston chamber into an upper chamber and a lower chamber; a first residue discharge hole is arranged in the side wall of the valve body; and a second residue discharge hole is arranged in the side wall of the piston. The piston which is slidably arranged in the valve body is driven by the differential pressure of the chamber formed by the filter plate as a control signal and power to move up and down along the inner cavity of the valve body, so that passive and automatic switching between the two working modes of "normal spraying" and "automatic residue discharge" is realized, and the fault signal of "clogging" is autonomously converted into the trigger instruction of "cleaning" action.

Description

Technical Field

[0001] This invention patent relates to the field of washing and screening equipment technology, specifically to a differential pressure driven self-cleaning nozzle and its usage method. Background Technology

[0002] In various industrial spraying applications, such as coal washing and beneficiation, mineral processing, chemical production, and waste gas and wastewater treatment, nozzle clogging is a common technical problem that has long been difficult to solve in the industry. Industrial spray water often contains impurities such as mud, solid particles, and flocculent impurities. When the fluid flows through traditional nozzles, it easily causes clogging of the flow channels and nozzles, directly destroying the atomization effect and failing to meet the process requirements of dust suppression, spraying, desulfurization, and cooling.

[0003] Existing conventional nozzles generally lack self-cleaning functions. When they become clogged, they can only be disassembled and flushed manually after the machine is stopped. This not only consumes a lot of manpower but also directly interrupts continuous production operations, significantly reducing overall production efficiency. At the same time, most traditional nozzles have outdated structural designs, complicated disassembly and assembly procedures, and are difficult to perform daily inspections, maintenance, and cleaning operations, continuously increasing equipment operation and maintenance costs. They are not suitable for complex and harsh industrial conditions with high dust levels, many impurities, and the need for long-term uninterrupted operation. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a differential pressure driven self-cleaning nozzle and its usage method, the specific technical solution of which is as follows: A differential pressure driven self-cleaning nozzle includes a valve body, a cover plate, a water supply pipe, and a nozzle; the cover plate is detachably disposed on the top of the valve body; the nozzle is disposed at the bottom of the valve body; a piston is slidably disposed in the inner cavity of the valve body; the outlet end of the water supply pipe passes through the cover plate and extends downward into the piston chamber; a filter plate is horizontally disposed in the middle of the piston chamber, the filter plate dividing the piston chamber into an upper chamber and a lower chamber; a first slag discharge hole is opened on the side wall of the valve body; a second slag discharge hole is opened on the side wall of the piston, the second slag discharge hole being connected to the upper chamber.

[0005] Preferably, the cover plate is also provided with a limit pin and an exhaust valve communicating with the inner cavity of the valve body.

[0006] Preferably, the piston has a limiting hole along its height direction corresponding to the position of the limiting pin. As the piston moves up and down, the limiting pin and the limiting hole slide together to guide and constrain the piston to shift horizontally.

[0007] Preferably, a first sealing ring is fitted onto the lower part of the outer wall of the water supply pipe.

[0008] Preferably, the outer surface of the piston is fitted with a plurality of second sealing rings at intervals from top to bottom.

[0009] Preferably, the outlet of the nozzle is connected to the internal cavity of the valve body.

[0010] Preferably, the filter plate has a plurality of filter holes on its surface.

[0011] Preferably, when the piston is located at the bottom of the valve body cavity, the first slag discharge hole and the second slag discharge hole are at the same height, forming a slag discharge channel.

[0012] More preferably, the inlet of the water supply pipe is connected to the municipal water supply pipe.

[0013] A method for using a differential pressure driven self-cleaning nozzle, employing the aforementioned differential pressure driven self-cleaning nozzle, specifically includes the following two operating conditions: When the nozzle is open, water flows into the upper chamber of the piston chamber through the inlet of the water supply pipe, and then flows into the lower chamber of the piston chamber through several filter holes of the filter plate. Due to the throttling effect of the filter plate, the pressure in the lower chamber is higher than that in the upper chamber. The pressure difference creates a pressure difference that pushes the piston to move upward along the inner cavity of the valve body. At this time, the first slag discharge hole and the second slag discharge hole are staggered, and the water flows from the lower chamber into the nozzle to complete the spraying operation. When the nozzle filter plate becomes clogged with impurities during operation, the pressure in the upper and lower chambers of the piston chamber changes. The pressure in the upper chamber increases, pushing the piston downwards along the valve body until the first and second slag discharge holes are level, forming a through slag discharge channel. The clogged impurities are flushed out through the slag discharge channel by the water flow, achieving self-cleaning. After the impurities are cleared, the water flow flows back into the lower chamber through several filter holes. The pressure in the lower chamber is once again higher than that in the upper chamber, and the piston moves upwards again along the valve body. The first and second slag discharge holes are misaligned and closed again, and the water flow enters the nozzle from the lower chamber, restoring normal spraying operation.

[0014] The beneficial effects of this invention are: 1. Differential pressure drive and automatic state switching mechanism: The present invention has a piston that can slide freely inside the valve body. The pressure difference formed before and after the filter plate is used as the control signal and power to drive the piston to move up and down along the inner cavity of the valve body, thereby realizing passive and automatic switching between the two working modes of "normal spraying" and "automatic slag discharge". It autonomously converts the fault signal of "blockage" into the trigger command of "cleaning" action. 2. Integrated self-cleaning flow channel design: A second slag discharge hole is opened on one side of the piston, which is precisely aligned with the first slag discharge hole. When the piston moves down, the two holes align, forming a slag discharge channel that goes directly to the outside without passing through the filter plate, and flushing away the accumulated impurities under high pressure. After the cleaning action is completed, the system pressure is restored, the piston automatically resets, the two holes are misaligned, and the nozzle resumes normal operation. The whole process does not require any sensors, controllers or external power intervention. 3. High integration and reliability: The three major functions of sensing (differential pressure), judgment (piston movement), and execution (opening and slag discharge) are integrated into a few core mechanical components such as valve body, piston, and sealing ring. The structure is compact and the failure rate is low. There are few moving parts and they are all made of wear-resistant materials, resulting in a long service life. Attached Figure Description

[0015] The accompanying drawings constituting this invention are provided to further understand this application and do not constitute an undue limitation of this application.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the piston and water supply pipe installation. Figure 3 This is a schematic diagram of the water supply pipe structure; Figure 4 This is a schematic diagram of the piston structure; Figure 5 for Figure 4 Top view; Figure 6 This is a schematic diagram of the internal structure of the present invention in its working state; Figure 7 This is a schematic diagram of the internal structure of the present invention in the slag discharge state; In the diagram, 1 is the valve body; 101 is the first slag discharge hole; 2 is the cover plate; 201 is the limit pin; 202 is the exhaust valve; 3 is the water supply pipe; 301 is the water inlet; 302 is the first sealing ring; 4 is the piston; 401 is the piston chamber; 402 is the second slag discharge hole; 403 is the limit hole; 404 is the filter plate; 4041 is the filter hole; 405 is the second sealing ring; and 5 is the nozzle. Detailed Implementation

[0017] The specific implementation of a differential pressure driven self-cleaning nozzle and its usage method provided by the present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0018] like Figures 1-5 As shown, a differential pressure driven self-cleaning nozzle includes a valve body 1, a cover plate 2, a water supply pipe 3, and a nozzle 5. The cover plate 2 is detachably mounted on the top of the valve body 1; the nozzle 5 is located at the bottom of the valve body 1, and its outlet is connected to the inner cavity of the valve body 1; a piston 4 (a cylindrical hollow structure with openings at both ends) is slidably mounted in the inner cavity of the valve body 1; the outlet end of the water supply pipe 3 passes through the cover plate 2 and extends downward into the piston chamber 401.

[0019] Preferably, a filter plate 404 is horizontally arranged in the middle of the piston chamber 401, and a plurality of filter holes 4041 are formed on the surface of the filter plate 404; the filter plate 404 divides the piston chamber 401 into an upper chamber and a lower chamber.

[0020] Preferably, the valve body 1 has a first slag discharge hole 101 on its side wall; the piston 4 has a second slag discharge hole 402 on its side wall. It is worth noting that the second slag discharge hole 402 is connected to the upper chamber of the piston 4.

[0021] Preferably, the cover plate 2 is also provided with a limit pin 201 and an exhaust valve 202 communicating with the inner cavity of the valve body 1 at a position away from the water supply pipe 3.

[0022] To ensure that the piston 4 can only move up and down along the axial direction of the inner cavity of the valve body 1, a limiting hole 403 is provided on the piston 4 along its height direction corresponding to the position of the limiting pin 201. As the piston 4 moves up and down, the limiting pin 201 and the limiting hole 403 slide in a guiding manner, thereby constraining the horizontal displacement of the piston 4.

[0023] Preferably, a first sealing ring 302 is fitted on the lower part of the outer wall of the water supply pipe 3, and a plurality of second sealing rings 405 are fitted on the outer surface of the piston 4 from top to bottom at intervals, thereby ensuring the formation of an effective pressure difference.

[0024] Preferably, when the piston 4 is located at the bottom of the inner cavity of the valve body 1, the first slag discharge hole 101 and the second slag discharge hole 402 are at the same height, forming a through slag discharge channel.

[0025] Preferably, the inlet 301 of the water supply pipe 3 is connected to the municipal water supply pipe to achieve spray water supply.

[0026] The following is a detailed explanation of how to use this differential pressure driven self-cleaning nozzle, specifically including the following two operating conditions: Operating Condition 1: When nozzle 5 is open, water flows into the upper chamber of piston chamber 401 through inlet 301 of water supply pipe 3, and then flows into the lower chamber of piston chamber 401 through several filter holes 4041 of filter plate 404. Due to the throttling effect of filter plate 404, the pressure in the lower chamber gradually becomes higher than that in the upper chamber. The pressure difference between the two pushes piston 4 upward along the inner cavity of valve body 1. At this time, the first slag discharge hole 101 and the second slag discharge hole 402 are staggered. Water flows from the lower chamber of piston 4, which is connected to the inner cavity of valve body 1, into nozzle 5, completing the spraying operation. Figure 6 As shown.

[0027] Operating Condition 2: During operation, when the filter plate 404 of nozzle 5 is clogged by impurities, the pressure in the upper and lower chambers of piston chamber 401 changes. The pressure in the upper chamber of piston chamber 401 gradually increases, which in turn pushes piston 4 downward along the inner cavity of valve body 1 until the first slag discharge hole 11 and the second slag discharge hole 402 are level, forming a through slag discharge channel (e.g., Figure 7 As shown, the blockage impurities are flushed out of the slag discharge channel by the water flow, achieving self-cleaning; after the impurities are discharged, the water flow flows again into the lower chamber of the piston chamber 401 through several filter holes 4041, the pressure in the lower chamber is higher than that in the upper chamber again, the piston 4 moves upward again along the inner cavity of the valve body 1, and the first slag discharge hole 101 and the second slag discharge hole 402 are misaligned and closed again. At this time, the water flow is again introduced into the nozzle 5 from the lower chamber of the piston 4 which is connected to the inner cavity of the valve body 1, and the normal spraying operation is restored.

[0028] It is worth emphasizing that, in order to improve the overall service life of the equipment and facilitate processing, all major components in this invention can be manufactured using standard machining (such as turning and milling) and injection molding processes. The materials are also made of wear-resistant materials that are readily available on the market, making it easy to achieve large-scale production.

[0029] This invention features a freely sliding piston built into the valve body. The pressure difference between the front and back of the filter plate is used as a control signal and power to drive the piston to move up and down along the inner cavity of the valve body. This enables passive and automatic switching between two working modes: "normal spraying" and "automatic slag discharge". It autonomously converts the "clogging" fault signal into a trigger command for "cleaning". The entire process requires no sensors, controllers or external power intervention. The structure is compact and has a low failure rate, making it easy to disassemble and maintain.

[0030] In this invention, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are merely used to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any particular component or element in this invention, nor should they be construed as limiting the invention. Terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of the above terms in this invention based on the specific circumstances, and they should not be construed as limiting the invention.

[0031] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A differential pressure driven self-cleaning nozzle, characterized in that, It includes a valve body, a cover plate, a water supply pipe, and a nozzle; the cover plate is detachably mounted on the top of the valve body; the nozzle is mounted on the bottom of the valve body. A piston is slidably disposed in the inner cavity of the valve body; the outlet end of the water supply pipe passes through the cover plate and extends downward into the piston chamber; a filter plate is horizontally disposed in the middle of the piston chamber, and the filter plate divides the piston chamber into an upper chamber and a lower chamber; The valve body has a first slag discharge hole on its side wall; the piston has a second slag discharge hole on its side wall, and the second slag discharge hole is connected to the upper chamber.

2. The pressure differential driven self-cleaning nozzle according to claim 1, characterized in that, The cover plate is also provided with a limit pin and an exhaust valve that communicates with the inner cavity of the valve body.

3. The pressure differential driven self-cleaning nozzle according to claim 2, characterized in that, The piston has a limiting hole along its height direction corresponding to the position of the limiting pin. As the piston moves up and down, the limiting pin and the limiting hole slide together to guide and constrain the piston to shift horizontally.

4. The pressure differential driven self-cleaning nozzle according to claim 1, characterized in that, A first sealing ring is fitted on the lower part of the outer wall of the water supply pipe.

5. The differential pressure driven self-cleaning nozzle according to claim 3, characterized in that, The piston's outer surface is fitted with several second sealing rings at intervals from top to bottom.

6. The pressure differential driven self-cleaning nozzle according to claim 1, characterized in that, The nozzle outlet is connected to the valve body cavity.

7. The pressure differential driven self-cleaning nozzle according to claim 5, characterized in that, The filter plate has several filter holes on its surface.

8. The differential pressure driven self-cleaning nozzle according to claim 7, characterized in that, When the piston is located at the bottom of the valve body cavity, the first slag discharge hole and the second slag discharge hole are at the same height, forming a slag discharge channel.

9. The differential pressure driven self-cleaning nozzle according to claim 8, characterized in that, The inlet of the water supply pipe is connected to the municipal water supply pipe.

10. A method of using a differential pressure driven self-cleaning nozzle, employing the differential pressure driven self-cleaning nozzle according to any one of claims 7-9, characterized in that, Specifically, it includes the following two working conditions: When the nozzle is open, water flows into the upper chamber of the piston chamber through the inlet of the water supply pipe, and then flows into the lower chamber of the piston chamber through several filter holes of the filter plate. Due to the throttling effect of the filter plate, the pressure in the lower chamber is higher than that in the upper chamber. The pressure difference creates a pressure difference that pushes the piston to move upward along the inner cavity of the valve body. At this time, the first slag discharge hole and the second slag discharge hole are staggered, and the water flows from the lower chamber into the nozzle to complete the spraying operation. When the nozzle filter plate becomes clogged with impurities during operation, the pressure in the upper and lower chambers of the piston chamber changes. The pressure in the upper chamber increases, pushing the piston downwards along the valve body until the first and second slag discharge holes are level, forming a through slag discharge channel. The clogged impurities are flushed out through the slag discharge channel by the water flow, achieving self-cleaning. After the impurities are cleared, the water flow flows back into the lower chamber through several filter holes. The pressure in the lower chamber is once again higher than that in the upper chamber, and the piston moves upwards again along the valve body. The first and second slag discharge holes are misaligned and closed again, and the water flow enters the nozzle from the lower chamber, restoring normal spraying operation.

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