Electromagnetic valve

Abstract

The utility model relates to the technical field of valves, and discloses an electromagnetic valve which comprises an electromagnetic valve cover used for driving a diaphragm to ascend and descend and further comprises a water inlet end, a valve seat and a water outlet end which are sequentially connected, and an overflow cavity is formed between the valve seat and the electromagnetic valve cover. An annular filter screen is detachably arranged between the main valve port and the valve seat; a conical diffusion section is arranged on the inner wall of the water inlet end and communicates with the deposition cavity, and a deposition ramp is formed by the conical diffusion section and the bottom of the deposition cavity. The problem that in the prior art, due to large impurities in a water path, an electromagnetic valve loses efficacy can be solved, the filter screen can enable the impurities with the small particle size to pass through, disassembly is convenient and fast, and the impurities with the large particle size can be effectively blocked and collected in cooperation with the deposition cavity structure.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a solenoid valve. Background Art

[0002] Solenoid valves are fundamental automation components used to control the flow of liquids or gases. They are widely used in factory water pipe networks to enhance automation. For cost and durability reasons, these networks typically utilize welded carbon steel pipes. Over time, large impurities such as rust and welding slag, which detach from the pipes due to corrosion, can enter downstream water equipment along with the water flow. Furthermore, during maintenance of the pipe network, if operators lack proper protection, debris such as stones can also enter the pipes. Therefore, rust, welding slag, and stones are common examples of large solid impurities found in water pipes.

[0003] Existing pipeline solenoid valves usually use the rise and fall of the diaphragm to control the conduction and closing of the water channel. When the solid impurities in the water channel are large in particle size, they are easily stuck between the diaphragm and the main valve seat, resulting in a loose seal between the valve core and the main valve port, making it impossible to cut off the water channel and causing the solenoid valve to fail.

[0004] To overcome the above-mentioned shortcomings, the existing technology adopts a filter screen set at the front end of the water inlet chamber of the solenoid valve. However, the filter screen will be clogged after running for a period of time and needs to be cleaned manually on a regular basis, which is time-consuming and labor-intensive. In particular, some secondary water with poor water quality contains more impurities, which greatly shortens the cleaning cycle of the conventional filter screen and increases the maintenance cost. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a solenoid valve to solve the problem in the prior art that larger impurities in the water channel cause the solenoid valve to fail. Its filter net can allow smaller particle size impurities to pass through and is convenient and quick to disassemble. Combined with the sedimentation chamber structure, it can effectively block and collect larger particle size impurities.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A solenoid valve comprises a solenoid valve cover for driving a diaphragm to rise and fall, and further comprises a water inlet end, a valve seat and a water outlet end connected in sequence, the valve seat and the solenoid valve cover being detachably fixedly connected, and an overflow chamber being formed between the valve seat and the solenoid valve cover;

[0008] A main valve port is provided in the valve seat. The opening and closing of the main valve port near the solenoid valve cover is controlled by the corresponding lifting of the diaphragm. The other end is connected to the water outlet. A sedimentation cavity is formed between the valve seat and the main valve port. The sedimentation cavity surrounds the outside of the main valve port and forms an inclined ramp with a higher side at the water outlet and a lower side at the water inlet. A removable annular filter is provided between the main valve port and the valve seat.

[0009] A conical diffusion section is provided on the inner wall of the water inlet end. The conical diffusion section is communicated with the sedimentation cavity and forms a sedimentation ramp with the bottom of the sedimentation cavity.

[0010] Furthermore, a mounting protrusion is provided on the outer wall of one end of the main valve port near the solenoid valve cover, and a mounting ring groove is provided on the corresponding inner wall of the valve seat. An annular filter is installed on the mounting protrusion and the mounting ring groove. A limit ring groove is also provided on the inner wall of the valve seat. The limit ring groove is located above the mounting ring groove. A retaining spring is installed in the limit ring groove, and the retaining spring is in contact with the annular filter.

[0011] Furthermore, a slag discharge port is provided on the valve seat at the bottom of the deposition chamber;

[0012] Furthermore, a plurality of circular holes are evenly distributed on the annular filter screen, and the diameter of the circular holes is 1-8 mm.

[0013] Furthermore, the diameter of the limiting ring groove is larger than the diameter of the installation ring groove.

[0014] Furthermore, flanges are provided at the ports of the water inlet and the water outlet.

[0015] Furthermore, the main valve port is in the shape of a curved pipe.

[0016] Furthermore, the material of the annular filter is aluminum alloy.

[0017] Beneficial effects of the utility model:

[0018] 1. The utility model sets a conical diffusion section at the water inlet end and utilizes the change in flow rate to make some impurity particles with larger particle sizes more easily deposited on the sedimentation ramp. A ring filter that can be quickly disassembled is provided to intercept the remaining impurities with larger particle sizes in the sedimentation chamber. The larger particle size impurities slide to the bottom of the sedimentation chamber along the inclined ramp due to their own weight, and the slag discharge port at the bottom of the sedimentation chamber is used to realize the rapid discharge of impurities. In this process, impurities with smaller particle sizes pass directly through the ring filter, thereby reducing the filtration load of the ring filter to the greatest extent.

[0019] 2. In the present invention, since the contact surface between the annular filter and the impurities is at the bottom, on the one hand, the annular filter is less likely to be blocked by impurities. On the other hand, during the process of opening and closing the main valve port, the residual water in the overflow chamber flows back to the sedimentation chamber, which also has a certain backwashing effect on the annular filter. Compared with the prior art method of adding a filter in front of the water inlet end of the solenoid valve, the present invention can reduce the frequency of cleaning or replacing the filter.

[0020] 3. The aperture of the annular filter of the utility model is larger. Unlike conventional filters that pursue filtering effects, it can allow smaller particle size impurities to pass through and is convenient and quick to disassemble. Combined with the sedimentation chamber structure, it can effectively block and collect larger particle size impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a top view of the valve seat of the utility model;

[0023] Figure 3 yes Figure 2 Middle AA cross-sectional view;

[0024] Figure 4 yes Figure 3 A partial enlarged schematic diagram of point M in the middle.

[0025] Among them, 1-solenoid valve cover, 2-valve seat, 21-water inlet end, 211-conical diffusion section, 22-water outlet end, 23-overflow chamber, 24-main valve port, 241-installation protrusion, 25-sedimentation chamber, 251-inclined ramp, 252-slag discharge port, 253-sedimentation ramp, 26-installation ring groove, 261-annular filter screen, 27-limiting ring groove, 271-circlip. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and are only schematic diagrams, not actual drawings. They should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the dimensions of the actual product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the figures.

[0027] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "up", "down", "left", "right", "front", "back", etc. indicate directions or positional relationships, they are based on the directions or positional relationships shown in the figures. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] like Figures 1-4As shown, a solenoid valve of the present invention includes a solenoid valve cover 1 for driving the diaphragm to rise and fall. The solenoid valve cover 1 and the diaphragm it drives are both existing technologies, and their specific structures and principles are not repeated here; the solenoid valve also includes a water inlet end 21, a valve seat 2 and a water outlet end 22 connected in sequence. For example, the connection method can be welding or other one-piece molding methods; the valve seat 2 and the solenoid valve cover 1 are connected by bolts, and an overflow chamber 23 is formed between the valve seat 2 and the solenoid valve cover 1.

[0029] In this embodiment, a main valve port 24 is provided in the valve seat 2. The main valve port 24 is in the shape of a curved tube. The opening and closing of the main valve port 24 close to the solenoid valve cover 1 is controlled by the corresponding lifting of the diaphragm. The other end is connected to the water outlet end 22. A sedimentation chamber 25 is formed between the valve seat 2 and the main valve port 24. The sedimentation chamber 25 surrounds the outside of the main valve port 24 and forms an inclined ramp 251 with a high side on the water outlet end 22 and a low side on the water inlet end 21. The inclined ramp 251 is U-shaped (from a top-down perspective). The annular filter screen 261 intercepts impurities with larger particles in the sedimentation chamber 25, and the larger impurities slide to the bottom of the sedimentation chamber 25 along the inclined ramp 251 due to their own weight. A slag discharge port 252 is provided on the valve seat 2 at the bottom of the sedimentation chamber 25. The slag discharge port 252 is normally closed when the solenoid valve is in use and is opened when impurities need to be cleaned. It should be understood that the closing and opening of the slag discharge port 252 can be achieved by using a variety of existing technical methods. For example, a commonly used slag discharge valve is installed at the slag discharge port 252 to automatically discharge impurities out of the solenoid valve at a regular basis, or it can be simply closed and opened through a detachable sealing cover, and the impurities can be flushed with water or cleaned manually. The specific structure and principle will not be repeated here.

[0030] In this embodiment, a mounting protrusion 241 is provided on the outer wall of the main valve port 24 near the solenoid valve cover 1. A mounting annular groove 26 is provided on the corresponding inner wall of the valve seat 2. An annular filter 261 is mounted on the mounting protrusion 241 and the mounting annular groove 26. The annular filter 261 is made of aluminum alloy. A retaining ring groove 27 is also provided on the inner wall of the valve seat 2. The retaining ring groove 27 is located above the mounting annular groove 26. A retaining spring 271 is mounted within the retaining ring groove 27. The retaining spring 271 contacts the annular filter 261 and provides axial limiting. The retaining spring 271 cooperates with the mounting annular groove 26 and the mounting protrusion 241 to secure the annular filter 261. The annular filter 261 is evenly distributed with a plurality of circular holes, each with a diameter ranging from 1 to 8 mm. The diameter of the holes is selected based on the actual water quality. The diameter of the retaining ring groove 27 is larger than that of the mounting annular groove 26 to facilitate quick removal of the annular filter 261.

[0031] In this embodiment, the inner wall of the water inlet end 21 is provided with a conical diffusion section 211. In the conical diffusion section 211, the inner hole cross-sectional area of ​​the water inlet end 21 gradually increases. The conical diffusion section 211 is connected to the sedimentation chamber 25 and is pulled through to the bottom of the sedimentation chamber 25 to form a sedimentation ramp 253.

[0032] In this embodiment, the valve core on the diaphragm can completely close the port of the main valve port 24. When the diaphragm rises, the main valve port 24 opens, and a fluid passage is formed along the water inlet end 21, the sedimentation chamber 25, the overflow chamber 23, the main valve port 24, and the water outlet end 22; when the diaphragm drops, the valve core presses against the main valve port 24, the main valve port 24 is closed, and the overflow chamber 23 and the water outlet end 22 are separated.

[0033] In this embodiment, flanges are integrally formed at the ports of the water inlet end 21 and the water outlet end 22 to facilitate connection with the water pipe network.

[0034] The working principle of this utility model is as follows:

[0035] When using the solenoid valve of the present invention, the solenoid valve is connected to the water pipe network through the flanges of the water inlet end 21 and the water outlet end 22, and the solenoid valve cover 1 is electrically connected to the control system of the water pipe network, so that the solenoid valve is incorporated into the water pipe network to realize automatic control. When the solenoid valve cover 1 drives the diaphragm to rise, the main valve port 24 opens, and a fluid passage is formed along the water inlet end 21, the sedimentation chamber 25, the overflow chamber 23, the main valve port 24, and the water outlet end 22; when the solenoid valve cover 1 drives the diaphragm to descend, the valve core on the diaphragm is pressed against the main valve port 24, the main valve port 24 is closed, and the overflow chamber 23 and the water outlet end 22 are separated.

[0036] During this process, when water flows through the conical diffusion section 211 of the water inlet end 21, the cross-sectional area becomes larger, so that the water flow rate will decrease and the pressure will increase. This reduction in flow rate can make some impurity particles with larger particle sizes more easily deposited on the sedimentation ramp 253 and pushed to the bottom of the sedimentation chamber 25 by the water flow. In addition, since the main valve port 24 in the valve seat 2 is in the shape of a curved tube, its structural characteristics also block some impurities with larger particle sizes from flowing upward. At the same time, the annular filter screen 261 intercepts the remaining impurities with larger particle sizes (i.e., larger than the diameter of the circular hole of the filter screen) in the sedimentation chamber 25, and the larger particle size impurities slide down the inclined ramp 251 to the bottom of the sedimentation chamber 25 due to their own weight; impurities with smaller particle sizes (i.e., smaller than the diameter of the circular hole of the filter screen) enter the overflow chamber 23 through the circular hole of the annular filter screen 261 and flow out along the main valve port 24 and the water outlet end 22. When there are a lot of impurities in the sedimentation chamber, the slag discharge port 252 at the bottom of the sedimentation chamber 25 can be opened to discharge the deposited impurities under the flushing of water flow.

[0037] When the solenoid valve needs to be repaired, disconnect the power supply of the solenoid valve, first remove the fixing bolts of the valve seat 2 and the solenoid valve cover 1, then use tools such as needle-nose pliers to clamp the clamping holes at both ends of the retaining ring 271, remove the retaining ring 271, and then take out the annular filter 261 for cleaning or replacement, thereby realizing the rapid disassembly and maintenance of the annular filter 261; and, since the contact surface of the annular filter 261 and the impurities is at the bottom, on the one hand, the annular filter 261 is not easily blocked by impurities, and on the other hand, in the process of switching the main valve port 24, the residual water in the overflow chamber 23 flows back to the sedimentation chamber 25, which also plays a certain backwashing role on the annular filter 261, and can reduce the cleaning or replacement frequency of the annular filter 261.

[0038] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalent substitutions shall be encompassed by the claims of the present invention. The techniques, shapes, and structural portions not described in detail in the present invention are well known.

Claims

1. A solenoid valve, comprising a solenoid valve cover (1) for driving a diaphragm to rise and fall, and further comprising a water inlet end (21), a valve seat (2), and a water outlet end (22) connected in sequence, wherein the valve seat (2) is detachably fixedly connected to the solenoid valve cover (1), and an overflow chamber (23) is formed between the valve seat (2) and the solenoid valve cover (1); characterized in that: A main valve port (24) is provided in the valve seat (2), and the opening and closing of one end of the main valve port (24) close to the electromagnetic valve cover (1) is realized by corresponding control of the diaphragm lifting and lowering, and the other end is communicated with the water outlet end (22). A sedimentation cavity (25) is formed between the valve seat (2) and the main valve port (24), and the sedimentation cavity (25) surrounds the outside of the main valve port (24) and forms an inclined ramp (251) with a higher side at the water outlet end (22) and a lower side at the water inlet end (21); a removable annular filter screen (261) is provided between the main valve port (24) and the valve seat (2); a conical diffusion section (211) is provided on the inner wall of the water inlet end (21), and the conical diffusion section (211) is communicated with the sedimentation cavity (25) and forms a sedimentation ramp (253) with the bottom of the sedimentation cavity (25).

2. The solenoid valve according to claim 1, characterized in that: The outer wall of one end of the main valve port (24) close to the solenoid valve cover (1) is also provided with a mounting protrusion (241), and the corresponding inner wall of the valve seat (2) is provided with a mounting ring groove (26). An annular filter (261) is installed on the mounting protrusion (241) and the mounting ring groove (26). A limiting ring groove (27) is also provided on the inner wall of the valve seat (2). The limiting ring groove (27) is located above the mounting ring groove (26). A retaining spring (271) is installed in the limiting ring groove (27), and the retaining spring (271) is in contact with the annular filter (261).

3. The solenoid valve according to claim 1, wherein: A slag discharge port (252) is provided on the valve seat (2) at the bottom of the deposition chamber (25).

4. The solenoid valve according to claim 1, wherein: A plurality of circular holes are evenly distributed on the annular filter screen (261), and the diameter of the circular holes is 1-8 mm.

5. The solenoid valve according to claim 2, characterized in that: The diameter of the limiting ring groove (27) is larger than the diameter of the mounting ring groove (26).

6. The solenoid valve according to claim 1, characterized in that: The ports of the water inlet end (21) and the water outlet end (22) are both provided with flanges.

7. The solenoid valve according to claim 1, characterized in that: The main valve port (24) is in the shape of a curved tube.

8. The solenoid valve according to claim 1, characterized in that: The material of the annular filter screen (261) is aluminum alloy.

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