Electromagnetic valve

Abstract

An electromagnetic valve comprises a valve body, a piston and a valve element, a valve cavity used for containing the piston is formed in the valve body, a first liquid inlet and a second liquid inlet which are both communicated with the valve cavity are further formed in the end and the side of the valve body respectively, and the first liquid inlet and the second liquid inlet are used for being connected with a first connecting pipe and a second connecting pipe in an inserted mode respectively. The end, relatively far away from the first liquid inlet, of the valve body is further provided with an inserting opening for inserting an electromagnetic driving assembly, and cleaning assemblies are arranged in the middle of the first connecting pipe and the middle of the second connecting pipe and communicate with the first liquid inlet or the second liquid inlet. And the fluid flowing into the valve body is allowed to be filtered through the cleaning assembly, filtered impurities are discharged along with the fluid through the first liquid inlet or the second liquid inlet during discharging, and the flow speed of the fluid can be increased when the fluid passes through the cleaning assembly. The self-cleaning check valve has the beneficial effects that impurities contained in fluid are filtered through the cleaning assembly so as to ensure that the fluid entering the valve cavity does not carry the impurities, and the self-cleaning check valve has the self-cleaning effect.

Description

Technical Field

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

[0002] The solenoid valve is a device widely used in hydraulic control systems to control the on / off or flow switching of the liquid flow in the hydraulic system.

[0003] Publication (Announcement) No.: CN113883113B discloses a solenoid valve, including a piston and a valve core, wherein the piston has an inner cavity for accommodating the valve core, the inner cavity includes a first liquid inlet, and the valve core is movably arranged in the inner cavity; the solenoid valve also includes a positioning sleeve, the positioning sleeve is provided with a first flow channel communicating with the inner cavity, the positioning sleeve is accommodated in the inner cavity and sleeves the valve core, the positioning sleeve is located on a side of the valve core relatively close to the first liquid inlet, and can stop the valve core;

[0004] The positioning sleeve includes a valve core sleeve, a valve core cavity is provided on a side of the valve core sleeve relatively close to the valve core, and the valve core is movably arranged in the valve core cavity; a sealing port is provided on the end of the piston relatively far from the first liquid inlet, and the sealing port is connected to the inner cavity;

[0005] The valve core can move in the inner cavity and seal the sealing port; when the valve core seals the sealing port, the valve core is partially accommodated in the valve core cavity and keeps matching with the inner wall of the valve core cavity;

[0006] The end of the positioning sleeve that is relatively close to the first liquid inlet of the inner cavity is provided with a screwing groove, and the screwing groove is used to cooperate with an external tool and tighten the positioning sleeve. This solenoid valve uses the positioning sleeve to stop the valve core. The positioning sleeve can withstand repeated impacts of the valve core to avoid deformation or even breakage of the valve core due to impact, thereby losing the stop function of the valve core and preventing the valve core from separating from the piston. However, there is a defect, that is, there is a lack of a filtering structure for the liquid, because impurities will be deposited in the valve cavity and block the flow channel of the fluid in the valve body, which will affect the conduction of the fluid. Summary of the invention

[0007] The present invention aims to solve the above-mentioned shortcomings of the prior art and provides a solenoid valve to solve the above-mentioned problems.

[0008] The present invention adopts a technical solution to solve its technical problems: the solenoid valve comprises a valve body, a piston, and a valve core, a valve cavity for accommodating the piston is provided inside the valve body, a first liquid inlet and a second liquid inlet which are both connected to the valve cavity are provided at the end and the side, respectively, the first liquid inlet and the second liquid inlet are respectively used to plug in the first connecting pipe and the second connecting pipe, an end of the valve body which is relatively far away from the first liquid inlet is also provided with a plug-in interface for plugging in the electromagnetic drive component, a cleaning component is provided at the center position of the first connecting pipe and the second connecting pipe, the cleaning component is connected to the first liquid inlet or the second liquid inlet, and allows the fluid flowing into the valve body to be filtered by the cleaning component, and the filtered impurities are discharged along with the fluid through the first liquid inlet or the second liquid inlet during discharge, and the flow rate of the fluid can be increased when passing through the cleaning component.

[0009] For further improvement, a connecting seat is provided at the center position of the first connecting pipe or the second connecting pipe to separate the first connecting pipe or the second connecting pipe into two pipe sections. The connecting seat is used to set the cleaning component, and a seat cover threadedly connected to it is provided at the upper end, and the lower end of the seat cover abuts against the upper end of the cleaning component.

[0010] To be further improved, the cleaning component includes a filter portion arranged in the connecting seat and connected to the first liquid inlet or the second liquid inlet, and a paddle arranged in the filter portion and rotatable relative to the filter portion, and the filter portion is provided with an inlet port connected to the liquid inlet of the first connecting pipe or the second connecting pipe to guide the fluid to the inner cavity of the filter portion through the inlet port.

[0011] To be further improved, the filter part includes an outer shell, and a filter net arranged on the outer peripheral surface of the outer shell in the length direction, the inlet is arranged at one end of the outer shell in the width direction, and a plurality of grids are formed on the outer peripheral surface of the outer shell, which can allow the fluid entering the inner cavity of the outer shell to pass through the filter net when discharged, and the grids extend along the length direction of the outer shell.

[0012] Further improvement, the grids are distributed in a circular array along the outer circumference of the shell.

[0013] For further improvement, a groove for placing the filter screen is provided on the outer circumferential surface of the shell, and a retaining ring is provided on the shell at the lower end of the groove, and a spacing distance matching the length of the filter screen is formed between the retaining ring and the upper end of the groove.

[0014] For further improvement, a limiting base is provided at the bottom of the shell, which is located below the retaining ring and has a preset shape and can be retracted when squeezed. The limiting base is hollow inside and communicates with the inner cavity of the shell.

[0015] To be further improved, the limiting base includes a combination body presenting a preset shape, and an extension body extending from the combination body and connected to the bottom of the shell, the combination body has a supporting base plate, and a connecting plate distributed around the supporting base and forming an angle with the supporting base plate, and the connecting plate is connected to the extension body.

[0016] For further improvement, the outer shell is provided with a paddle shaft with two ends arranged at both ends of the outer shell in the length direction, the axis of the paddle shaft coincides with the central axis of the outer shell, and the paddle is rotatably connected to the paddle shaft.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention is provided with a cleaning component in the first connecting pipe and the second connecting pipe, and the cleaning component filters impurities in the fluid, thereby ensuring that the fluid entering the valve cavity does not carry impurities, and the cleaning component is provided in the first connecting pipe and the second connecting pipe to meet the way that the fluid enters from the first liquid inlet or from the second liquid inlet, and can also flush the cleaning component when discharged, so as to have a certain self-cleaning effect;

[0019] 2. The present invention utilizes paddles disposed in the cleaning component to increase the flow rate of the fluid as it passes through the cleaning component, that is, the paddles are rotated by the impact of the fluid, and then the rotation of the paddles is used to generate negative pressure to increase the flow rate of the fluid. This method can improve the liquid flow efficiency and also increase the intensity of self-cleaning flushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the full cross-section structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the full cross-section structure of the filter part of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings:

[0023] Referring to the accompanying drawings: this solenoid valve includes a valve body 1, a piston 2, and a valve core 3. A valve cavity 11 for accommodating the piston 2 is provided inside the valve body 1, and a first liquid inlet 12 and a second liquid inlet 13 both connected to the valve cavity 11 are respectively provided at the end and the side. The first liquid inlet 12 and the second liquid inlet 13 are respectively used to plug in the first connecting pipe 4 and the second connecting pipe 5. An insertion port 14 for plugging in the electromagnetic drive component 6 is also provided at the end of the valve body 1 relatively far away from the first liquid inlet 12. A cleaning component 7 is provided at the center position of the first connecting pipe 4 and the second connecting pipe 5. The cleaning component 7 is connected to the first liquid inlet 12 or the second liquid inlet 13, and allows the cleaning component 7 to filter the fluid flowing into the valve body 1, and the filtered impurities are discharged along with the fluid through the first liquid inlet 12 or the second liquid inlet 13 during discharge, and the flow rate of the fluid can be increased when passing through the cleaning component 7. The principle of the present invention is that the valve body 1 and the piston 2 constitute a flow path for the fluid to pass through. When the first liquid inlet 12 and the second liquid inlet 13 of the valve body 1 are respectively plugged into the first pipe 4 and the second pipe 5, the fluid can enter the valve cavity 11 from the first liquid inlet 12 and flow out from the second liquid inlet 13. Of course, the fluid can also flow into the valve cavity 11 from the second liquid inlet 13 in the opposite direction of the above-mentioned flow path and flow out from the first liquid inlet 12. In order to prevent impurities in the fluid from following the fluid into the valve cavity 11 and being deposited in the valve cavity 11, a cleaning component 7 is provided in the first pipe 4 and the second pipe 5, so that the fluid can enter the valve cavity 11 and the second pipe 5 can be cleaned. Before entering the valve cavity 11, the fluid can pass through the cleaning component 7, that is, the cleaning component 7 is used to filter impurities in the fluid, so as to ensure that the fluid entering the valve cavity 11 does not carry impurities, and the first connecting pipe 4 and the second connecting pipe 5 are both provided with the cleaning component 7 to meet the way that the fluid enters from the first liquid inlet 12 or from the second liquid inlet 13. When the fluid is discharged from the first liquid inlet 12 or the second liquid inlet 13, the cleaning component 7 can also be flushed, thereby having a certain self-cleaning effect. At the same time, the flow rate of the fluid can be increased when passing through the cleaning component 7, which can improve the liquid flow efficiency and also improve the intensity of self-cleaning flushing.

[0024] A connecting seat 8 is provided at the center position of the first connecting pipe 4 or the second connecting pipe 5 to separate the first connecting pipe 4 or the second connecting pipe 5 into two pipe sections. The connecting seat 8 is used to set the cleaning component 7, and a seat cover 81 threadedly connected thereto is provided at the upper end. The lower end of the seat cover 81 abuts against the upper end of the cleaning component 7. The connecting seat 8 provides an accurate setting position for the cleaning component 7 and also separates the first connecting pipe 4 or the second connecting pipe 5. When the fluid enters the first liquid inlet 12 or the second liquid inlet 13, it will inevitably pass through the cleaning component 7, thereby filtering impurities in the fluid. The seat cover 81 is used to confine the cleaning component 7 in the connecting seat 8 and always keep it on the flow trajectory of the fluid.

[0025] The cleaning assembly 7 includes a filter portion 71 arranged on the connecting seat 8 and connected to the first liquid inlet 12 or the second liquid inlet 13, and a paddle 72 arranged in the filter portion 71 and rotatable relative to the filter portion 71. The filter portion 71 is provided with an inlet 9 connected to the liquid inlet of the first connecting pipe 4 or the second connecting pipe 5, so as to guide the fluid to the inner cavity of the filter portion 71 through the inlet 9. The filter portion 71 is used to filter impurities in the fluid, and the inlet 9 is used to guide the fluid into the filter portion 71, so that the fluid entering the filter portion 71 can be used to impact the paddle 72 arranged in the filter portion 71, and the paddle 72 can rotate by utilizing the impact of the fluid, and generate negative pressure by utilizing the rotation, thereby increasing the flow rate of the fluid, thereby improving the liquid flow efficiency, and also improving the intensity during self-cleaning flushing, thereby ensuring the flushing effect of the filter portion 71.

[0026] The filter part 71 includes a shell 71-a, and a filter screen 71-b arranged on the outer peripheral surface of the shell 71-a in the length direction. The inlet 9 is arranged at one end of the shell 71-a in the width direction. The outer peripheral surface of the shell 71-a is formed with a plurality of grids 71-a1 that can allow the fluid entering the inner cavity of the shell 71-a to pass through the filter screen 71-b when it is discharged. The grid 71-a1 extends along the length direction of the shell 71-a. The shell 71-a is used to be placed in the connecting seat 8, so that the fluid will inevitably pass through the cleaning component 7 after flowing, and then pass through the filter screen 71-b for convection. Impurities in the body are filtered to prevent them from entering the valve chamber 11 and causing blockage. The grid 71-a1 is used as an outlet on the one hand, so that the fluid entering the housing 71-a can leave the fluid and pass through the filter screen 71-b. On the other hand, it is used as a diversion outlet for diverting the fluid, that is, multiple settings can divert the fluid into multiple channels for multi-directional diversion, thereby preventing the fluid from acting on only a single position when passing through the filter screen 71-b, and preventing the filtered impurities from excessively accumulating at a single position of the filter screen 71-b and causing blockage, thereby improving the filtration efficiency.

[0027] The grids 71-a1 are distributed in a circular array along the outer circumference of the shell 71-a, so that the spacing between each grid 71-a1 is equal, and the fluid flowing out of the grid 71-a1 can evenly reach each position corresponding to the grid 71-a1 when passing through the filter 71-b, thereby making full use of the filtering surface provided by the filter 71-b and avoiding excessive accumulation of impurities in a certain place.

[0028] A groove 71-a3 for placing the filter 71-b is provided on the outer peripheral surface of the shell 71-a, and a retaining ring 71-a31 is provided on the shell 71 at the lower end of the groove 71-a3. An interval matching the length of the filter 71-b is formed between the retaining ring 71-a31 and the upper end of the groove 71-a3. Such a setting can facilitate the setting of the filter 71-b, that is, the groove 71-a3 gives the filter 71-b a clear setting position, and the upper end of the groove 71-a3 can produce an upper end constraint effect on the filter 71-b, and the retaining ring 71-a31 has a lower end constraint effect on the filter 71-b. At the same time, the retaining ring 71-a31 has a conical structure, which can prevent the filter 71-b from escaping from the groove 71-a3, so that the filter 71-b can be stably present in the groove 71-a3.

[0029] The bottom of the shell 71-a is provided with a limiting base 71-a2 located below the retaining ring 71-a3 and having a preset shape and retractable under compression. The limiting base 71-a2 is hollow inside and communicates with the inner cavity of the shell 71-a. This arrangement is intended to provide a clear reminder to the user when the seat cover 81 is covered on the connecting seat 8, that is, it is achieved by utilizing the reaction force generated by the retraction of the limiting base 71-a2. The reaction force will be converted into resistance that reduces the smoothness of the user's operation of the seat cover 81, but it is also this resistance that can remind the user that the cleaning component 7 is in the correct and reasonable position, and it also means that the seat cover 81 has been covered in place, because the threaded connection sometimes causes the seat cover 81 to rotate insufficiently due to the misalignment between the threads. At the same time, the limiting base 71-a2 increases the overall length of the shell 71-a, thereby increasing the capacity inside the shell 71-a.

[0030] The limiting base 71-a2 includes a combination body 71-a21 having a preset shape, and an extension body 71-a22 extending from the combination body 71-a21 and connected to the bottom of the housing 71-a. The combination body 71-a21 has a support base plate 71-a211, and a connecting plate 71-a212 surrounding the support base 71-a211 and forming an angle with the support base plate 71-a211. The connecting plate 71-a212 is connected to the extension body 71-a22. When the limiting base 71-a2 is not squeezed by the seat cover 81, the combination body 71-a21 is the limiting base 71-a2 having a preset shape. The extension body 71-a22 is used to be connected with the bottom of the shell 71-a, so that the combination 71-a21 has a conical structure with an angle, that is, the angle makes the combination 71-a21 elastic, the support base 71-a211 is the part that contacts the bottom surface of the connecting seat 8, and the connecting plate 71-a212 is the part that realizes the retraction of the combination 71-a21 when it is squeezed, that is, the angle formed between it and the support base 71-a211 will become smaller and smaller when it is subjected to force, and the smaller the angle, the greater the reaction force it generates, that is, the greater the resistance, so that the prompt effect on the user can be fully felt.

[0031] The outer shell 71-a is provided with a paddle shaft 10 at both ends of the outer shell 71-a in the length direction. The axis of the paddle shaft 10 coincides with the central axis of the outer shell 71-a. The paddle 72 is rotatably connected to the paddle shaft 10, and the filter portion 71 is placed horizontally, that is, the axis of the paddle 72 is perpendicularly intersected with the central axis of the inlet cavity 9. In this way, the rotation of the paddle 72 can be realized, and it can also be ensured that the fluid flowing into the filter portion 71 through the inlet cavity 9 can impact the paddle 72 when passing through the paddle 72, thereby driving the paddle 72 to rotate around the paddle shaft 10.

[0032] Although the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A solenoid valve, comprising a valve body (1), a piston (2), and a valve core (3), wherein a valve cavity (11) for accommodating the piston (2) is provided inside the valve body (1), and a first liquid inlet (12) and a second liquid inlet (13) both connected to the valve cavity (11) are provided at the end and the side, respectively, the first liquid inlet (12) and the second liquid inlet (13) being used for plugging a first pipe (4) and a second pipe (5) respectively, and an insertion port (14) for plugging an electromagnetic drive assembly (6) is provided at the end of the valve body (1) relatively far from the first liquid inlet (12), wherein: A cleaning assembly (7) is provided at the center of each of the first connecting pipe (4) and the second connecting pipe (5); the cleaning assembly (7) is in communication with the first liquid inlet (12) or the second liquid inlet (13), and allows the fluid flowing into the valve body (1) to be filtered by the cleaning assembly (7), and allows the filtered impurities to be discharged along with the fluid through the first liquid inlet (12) or the second liquid inlet (13) during discharge; and the flow rate of the fluid can be increased when the fluid passes through the cleaning assembly (7).

2. The solenoid valve according to claim 1, characterized in that: A connecting seat (8) is provided at the center of the first connecting pipe (4) or the second connecting pipe (5) for dividing the first connecting pipe (4) or the second connecting pipe (5) into two pipe sections. The connecting seat (8) is used to set the cleaning component (7), and a seat cover (81) threadedly connected thereto is provided at the upper end. The lower end of the seat cover (81) abuts against the upper end of the cleaning component (7).

3. The solenoid valve according to claim 2, characterized in that: The cleaning assembly (7) comprises a filter portion (71) arranged on the connecting seat (8) and connected to the first liquid inlet (12) or the second liquid inlet (13), and a paddle (72) arranged in the filter portion (71) and rotatable relative to the filter portion (71); the filter portion (71) is provided with a cavity inlet (9) connected to the liquid inlet of the first connecting pipe (4) or the second connecting pipe (5), so as to guide the fluid to the inner cavity of the filter portion (71) through the cavity inlet (9).

4. The solenoid valve according to claim 3, characterized in that: The filter portion (71) comprises a shell (71-a) and a filter screen (71-b) arranged on the outer peripheral surface of the shell (71-a) in the longitudinal direction, the inlet (9) is arranged at one end of the shell (71-a) in the width direction, and a plurality of grids (71-a1) are formed on the outer peripheral surface of the shell (71-a) so that the fluid entering the inner cavity of the shell (71-a) can pass through the filter screen (71-b) when discharged, and the grids (71-a1) extend along the longitudinal direction of the shell (71-a).

5. The solenoid valve according to claim 4, characterized in that: The grids (71-a1) are distributed in a circular array along the outer circumference of the housing (71-a).

6. The solenoid valve according to claim 5, characterized in that: A groove (71-a3) for the filter screen (71-b) to be placed therein is provided on the outer peripheral surface of the shell (71-a), and a retaining ring (71-a31) is provided on the shell (71) at the lower end of the groove (71-a3), and a spacing distance matching the length of the filter screen (71-b) is formed between the retaining ring (71-a31) and the upper end of the groove (71-a3).

7. The solenoid valve according to claim 6, characterized in that: The bottom of the shell (71-a) is provided with a limiting base (71-a2) located below the retaining ring (71-a3) and having a preset shape and capable of retracting when squeezed; the limiting base (71-a2) is hollow inside and communicates with the inner cavity of the shell (71-a).

8. The solenoid valve according to claim 7, characterized in that: The limiting base (71-a2) includes a combination (71-a21) in a preset shape, and an extension body (71-a22) extending from the combination (71-a21) and connected to the bottom of the shell (71-a), the combination (71-a21) has a supporting base plate (71-a211), and a connecting plate (71-a212) distributed around the supporting base (71-a211) and forming an angle with the supporting base plate (71-a211), and the connecting plate (71-a212) is connected to the extension body (71-a22).

9. The solenoid valve according to claim 8, characterized in that: The outer shell (71-a) is provided with a paddle shaft (10) with two ends arranged at both ends of the outer shell (71-a) in the length direction, the axis of the paddle shaft (10) coincides with the central axis of the outer shell (71-a), and the paddle (72) is rotatably connected to the paddle shaft (10).

Images