An electromagnetic valve

Abstract

The utility model belongs to valve technical field, especially point to a kind of electromagnetic valve, including electromagnet and valve body, valve body is equipped with valve core, valve core is equipped with through oil hole one, the axis of through oil hole one is perpendicular to the axis of valve core setting, valve core is equipped with through oil hole two in the left side of through oil hole one, the axis of through oil hole two is on the same straight line with the axis of valve core, through oil cavity that is formed in the left side of valve core and is connected through oil hole two, valve body is equipped with the oil inlet hole connected through through oil hole one and the oil outlet hole connected through oil cavity, plug is slidably arranged in through oil cavity, the taper for plugging through oil hole two is formed in the right end of plug, reset spring is arranged between plug and valve core, when the moving iron core of electromagnet extends, plug is pushed to move right, reset spring is compressed, plug plugs through oil hole two, when the moving iron core of electromagnet is retracted, plug moves left under the elastic force of reset spring, plug leaves through oil hole two. The utility model is equipped with only through oil hole one and through oil hole two two holes in valve core, and it is convenient for valve core processing.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and specifically refers to a solenoid valve. Background Technology

[0002] Solenoid valves are typically used in cranes to control the flow of hydraulic oil, thereby enabling start-up and shutdown control.

[0003] Chinese utility model patent application (CN203571175U, application date 2013.10.25, announcement date 2014.04.30) discloses a two-position two-way solenoid valve, comprising a magnetic sleeve, a movable iron slidably disposed within the hollow cavity of the magnetic sleeve, and a fixed iron slidably disposed within the cavity of the magnetic sleeve at intervals from the movable iron; a valve sleeve fixed to the front end of the magnetic sleeve, with a first oil port and a second oil port communicating with the internal cavity of the valve sleeve respectively opened at the end and side wall of the valve sleeve; and a coil. The coil is wrapped around the outside of the magnetic sleeve, providing a magnetic field that causes the moving iron to move towards the stationary iron when the coil is energized; the valve core has a bidirectional check function, the valve core is slidably disposed in the inner cavity of the valve sleeve, forming an oil cavity at the rear end of the valve core, and the valve core is provided with a first one-way damping hole for unidirectional flow from the first oil port to the oil cavity, a second one-way damping hole for unidirectional flow from the second oil port to the oil cavity, a third one-way damping hole for unidirectional flow from the oil cavity to the first oil port, and a fourth one-way damping hole communicating with the third damping hole is provided on the side wall of the valve core, and a steel ball and a positioning pin for limiting the steel ball are provided in the first one-way damping hole, the second one-way damping hole, the third one-way damping hole and the fourth one-way damping hole; the pilot valve core, the rear end of the pilot valve core is fixed to the moving iron by a push rod, and the pilot valve core extends into the valve core so that the front end of the pilot valve core cooperates with the third one-way damping hole of the valve core. This causes the third one-way damping orifice to close or open; a reset element, which is disposed between the valve core and the pilot valve core, forces the pilot valve core away from the valve core.

[0004] The drawback of the above-mentioned solenoid valve is that the valve core has a total of four holes: a first one-way damping hole, a second one-way damping hole, a third one-way damping hole, and a fourth one-way damping hole, which makes it inconvenient to process the valve core. Utility Model Content

[0005] The purpose of this utility model is to provide a solenoid valve that has only two holes, an oil passage hole one and an oil passage hole two, inside the valve core, which facilitates the processing of the valve core.

[0006] This utility model is implemented as follows: An electromagnetic valve includes an electromagnet and a valve body disposed to the right of the electromagnet. The valve body contains a valve core with its axis arranged laterally. The valve core has a first oil passage hole, the axis of which is perpendicular to the axis of the valve core. The valve core also has a second oil passage hole located to the left of the first oil passage hole, with its axis aligned with the axis of the valve core. The second oil passage hole connects to the first oil passage hole, forming an oil passage cavity on the left side of the valve core. The valve body has an inlet connecting to the first oil passage hole and an outlet connecting to the oil passage cavity. A plug slides within the oil passage cavity. The right end of the plug is tapered for sealing the second oil passage hole. A return spring is provided between the plug and the valve core. When the moving iron core of the electromagnet extends, it pushes the plug to the right, compressing the return spring and sealing the second oil passage hole. When the moving iron core of the electromagnet retracts, the plug moves to the left under the force of the return spring, disengaging from the second oil passage hole.

[0007] In one of the above-mentioned solenoid valves, the right end of the valve core is provided with a threaded section that is screwed to the valve body, the valve body is provided with a push block located on the left side of the plug, and a pressure adjusting spring is provided between the plug and the push block. Rotating the threaded section can adjust the elastic force of the pressure adjusting spring.

[0008] In one of the aforementioned solenoid valves, the valve core and the threaded section are an integral structure.

[0009] In one of the aforementioned solenoid valves, the right end of the threaded section extends out of the valve body and is screwed with a locking nut, and the right end face of the threaded section is recessed to form an internal hexagonal groove.

[0010] In the aforementioned solenoid valve, the right end face of the push block is recessed to form a guide groove. The plug includes a guide member slidably disposed in the valve body, a sealing member disposed at the right end of the guide member, and a guide post disposed at the left end of the guide member. The right end of the sealing member is conical for sealing the second oil passage hole, and the reset spring is fitted outside the sealing member. The left end of the pressure regulating spring is disposed in the guide groove, and the right end is fitted outside the guide post.

[0011] In one of the aforementioned solenoid valves, the push block includes a small cylindrical section and a large cylindrical section located to the right of the small cylindrical section, the guide groove is disposed within the large cylindrical section, and the push block has a through hole extending from left to right.

[0012] In one of the above-mentioned solenoid valves, the outer wall of the valve core is recessed at an oil passage hole to form an annular oil passage groove, which connects the oil inlet hole and the oil passage hole.

[0013] In the aforementioned solenoid valve, the valve body is provided with a mounting hole for installing a valve core. The mounting hole has a recessed side wall at one point of the annular oil passage groove to form an annular oil passage groove two. The annular oil passage groove two connects the oil inlet hole and the annular oil passage groove one, and the width of the annular oil passage groove two is smaller than the width of the annular oil passage groove one.

[0014] In the aforementioned solenoid valve, the valve body is provided with a through hole extending through both the left and right ends. The through hole includes an assembly hole, a mounting hole, and a threaded hole. Both the assembly hole and the mounting hole are circular holes, and the diameter of the assembly hole is larger than the diameter of the mounting hole, while the diameter of the mounting hole is smaller than the minor diameter of the threaded hole. The push block is slidably disposed in the assembly hole, and the right end of the assembly hole limits the push block to the right. The assembly hole and the mounting hole on the left side of the valve core form the oil passage cavity.

[0015] In one of the aforementioned solenoid valves, a plane is provided on the outer wall of the guide member, and an oil passage is formed between the plane and the wall of the mounting hole. There are two or more such planes.

[0016] In the aforementioned solenoid valve, the valve body is a cuboid, the oil outlet is arranged vertically and located in the lower half of the valve body, the oil inlet includes a vertical hole and a longitudinal hole, the vertical hole is located in the lower half of the valve body, the longitudinal hole is located in the rear half of the valve body, and the longitudinal hole connects the vertical hole and the annular oil groove.

[0017] In one of the aforementioned solenoid valves, the two ends of the longitudinal hole away from the annular oil groove are sealed with internal hexagonal plugs.

[0018] In the aforementioned solenoid valve, an O-ring is provided between the valve core and the valve body, and two O-rings are provided, which are located on the left and right sides of the annular oil groove, respectively.

[0019] In the aforementioned solenoid valve, the outer wall of the valve core is recessed to form two annular mounting grooves, and the O-rings are respectively installed in the corresponding annular mounting grooves.

[0020] In one of the above-mentioned solenoid valves, the outer surface of the valve body is recessed at the outer end of the oil inlet to form an installation groove. A filter cap is provided in the installation groove and fixed by an O-ring. The O-ring is disposed between the side wall of the installation groove and the filter cap.

[0021] In the aforementioned solenoid valve, the filter cap includes a circular main body portion covering the oil inlet and an annular mounting portion for supporting the circular main body portion. The filter cap is provided with a plurality of filter holes, and the O-ring is disposed between the side wall of the mounting groove and the annular mounting portion.

[0022] In one of the aforementioned solenoid valves, the filter cap is formed by bending a metal plate with filter holes.

[0023] The outstanding advantages of this utility model compared to the prior art are: 1. This utility model provides an oil passage hole 1 with its axis perpendicular to the valve core axis inside the valve core. The oil passage hole 1 connects to the oil inlet hole. An oil passage hole 2 with its axis on the same straight line as the valve core axis is provided. An oil passage cavity is formed on the left side of the valve core, which connects to the oil outlet hole. The oil passage hole 2 is blocked by a plug, thereby disconnecting the connection between the oil passage hole 2 and the oil passage cavity. Only two holes, oil passage hole 1 and oil passage hole 2, need to be provided inside the valve core, which is convenient for processing.

[0024] 2. The valve core of this utility model has a threaded section on the right end that is screwed to the valve body. The valve body has a push block located on the left side of the plug. A pressure adjusting spring is provided between the plug and the push block. Rotating the threaded section can adjust the elastic force of the pressure adjusting spring to adjust the oil pressure of the crane hydraulic system.

[0025] 3. The outer surface of the valve body of this utility model has an indentation at the outer end of the oil inlet hole to form an installation groove. A filter cap is provided in the installation groove and is fixed by an O-ring. The O-ring is located between the side wall of the installation groove and the filter cap, effectively filtering the oil entering the oil inlet hole. Attached Figure Description

[0026] Figure 1 This is a three-dimensional representation of the present invention. Figure 1 .

[0027] Figure 2 This is a three-dimensional representation of the present invention. Figure 2 .

[0028] Figure 3 This is a cross-sectional view of the plug of this utility model without sealing the oil passage two.

[0029] Figure 4 This is a cross-sectional view of the plug used in this utility model to seal the oil passage.

[0030] Figure 5 This is a bottom view of the valve body of this utility model.

[0031] Figure 6 yes Figure 5 A schematic diagram of the cross section along line AA.

[0032] Figure 7 This is an exploded view of this utility model.

[0033] Reference numerals: 1. Valve body; 2. Valve core; 3. Oil passage hole one; 4. Oil passage hole two; 5. Oil passage chamber; 6. Oil inlet hole; 6a. Vertical hole; 6b. Longitudinal hole; 7. Oil outlet hole; 8. Plug; 8a. Guide component; 8b. Sealing component; 8c. Guide post; 9. Return spring; 10. Threaded section; 11. Push block; 11a. Small cylindrical section; 11b. Large cylindrical section; 12. Pressure adjusting spring; 13. Locking nut; 14. Internal hexagonal groove; 15. Guide groove; 16. Annular oil passage groove one; 17. Mounting hole; 18. Annular oil passage groove two; 19. O-ring one; 20. Mounting groove; 21. Filter cap; 22. O-ring two; 23. Assembly hole; 24. Threaded hole; 25. Flat surface; 26. Oil passage. Detailed Implementation

[0034] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —7: An electromagnetic valve includes an electromagnet and a valve body 1 disposed to the right of the electromagnet. The valve body 1 contains a valve core 2 with its axis arranged laterally. The valve core 2 contains an oil passage hole 3, the axis of which is perpendicular to the axis of the valve core 2. The valve core 2 also contains an oil passage hole 4 located to the left of the oil passage hole 3, the axis of which is collinear with the axis of the valve core 2, and the oil passage hole 4 connects to the oil passage hole 3, forming an oil passage cavity 5 on the left side of the valve core 2. The valve body 1 contains... There is an oil inlet 6 connected to oil hole 3 and an oil outlet 7 connected to oil cavity 5. A plug 8 is slidably installed in the oil cavity 5. The right end of the plug 8 is conical for sealing oil hole 4. A return spring 9 is provided between the plug 8 and the valve core 2. When the moving iron core of the electromagnet extends, it pushes the plug 8 to move to the right, compressing the return spring 9, and the plug 8 seals the oil hole 4. When the moving iron core of the electromagnet retracts, the plug 8 moves to the left under the elastic force of the return spring 9, and the plug 8 leaves the oil hole 4.

[0035] The working principle of this utility model is as follows: Figure 1-7 As shown, when the electromagnet is energized, the moving iron core of the electromagnet extends out, pushing the plug 8 to move to the right, compressing the return spring 9, and the plug 8 blocks the second oil passage hole 4. The second oil passage hole 4 is disconnected from the oil passage cavity 5. After the oil is pumped into the oil inlet hole 6 by the oil pump, it passes through the first oil passage hole 3 and the second oil passage hole 4 and does not flow into the oil passage cavity 5. Therefore, the oil will enter the crane hydraulic system and the crane will work.

[0036] When the electromagnet is de-energized, the moving iron core of the electromagnet retracts, and the plug 8 moves to the left under the elastic force of the return spring 9. The second oil passage 4 connects with the oil passage cavity 5. After the oil is pumped into the oil inlet 6 by the oil pump, it passes through the first oil passage 3, the second oil passage 4, the oil passage cavity 5, and the oil outlet 7 and returns to the oil tank. The crane does not work. This invention provides an oil passage hole 3 with its axis perpendicular to the axis of valve core 2 inside the valve core. The oil passage hole 3 connects to the oil inlet hole 6. An oil passage hole 4 with its axis aligned with the axis of valve core 2 is also provided. An oil passage cavity 5 is formed on the left side of valve core 2, connecting to the oil passage hole 4. The oil passage cavity 5 connects to the oil outlet hole 7. The oil passage hole 4 is then sealed with a plug, thereby disconnecting the connection between the oil passage hole 4 and the oil passage cavity 5. Only two holes, oil passage hole 3 and oil passage hole 4, need to be provided inside the valve core 2, which is convenient for processing.

[0037] To adjust the spring force of the pressure regulating spring 12 and thus regulate the oil pressure of the crane's hydraulic system, the right end of the valve core 2 is provided with a threaded section 10 that is screwed onto the valve body 1. Inside the valve body 1, a push block 11 is located to the left of the plug 8. A pressure regulating spring 12 is positioned between the plug 8 and the push block 11. Rotating the threaded section 10 adjusts the spring force of the pressure regulating spring 12. The push block 11 facilitates the moving iron core of the electromagnet pushing the valve core 2 to the right.

[0038] When the valve core 2 is rotated and moves to the right, the elastic force of the pressure regulating spring 12 decreases, and a portion of the oil returns to the oil tank through the oil hole 1 3, the oil passage hole 2 4, the oil passage chamber 5, and the oil outlet hole 7, thereby reducing the oil pressure of the crane hydraulic system.

[0039] When the valve core 2 is rotated in the opposite direction, causing the valve core 2 to move to the left, the elastic force of the pressure regulating spring 12 increases, reducing the amount of oil returning to the oil tank through oil hole 1 3, oil passage hole 2 4, oil passage chamber 5, and oil outlet hole 7, thereby increasing the oil pressure of the crane hydraulic system.

[0040] To ensure a secure and reliable connection and to reduce assembly steps, the valve core 2 and the threaded section 10 are integrated into one piece.

[0041] In order to lock the valve core 2, the right end of the threaded section 10 extends out of the valve body 1 and is screwed with a locking nut 13. The right end face of the threaded section 10 is recessed to form an internal hexagonal groove 14, which facilitates the rotation of the valve core 2.

[0042] Mounting structure of pressure regulating spring 12: as follows Figure 3 , 4 As shown in Figure 7, the right end face of the push block 11 is recessed to form a guide groove 15. The plug 8 includes a guide member 8a slidably disposed in the valve body 1, a sealing member 8b disposed at the right end of the guide member 8a, and a guide post 8c disposed at the left end of the guide member 8a. The right end of the sealing member 8b is conical for sealing the oil passage hole 4, and the reset spring 9 is fitted on the outside of the sealing member 8b. The left end of the pressure regulating spring 12 is disposed in the guide groove 15, and the right end is fitted on the outside of the guide post 8c.

[0043] Structure of push block 11: The push block 11 includes a small cylindrical section 11a and a large cylindrical section 11b located to the right of the small cylindrical section 11a. The guide groove 15 is disposed in the large cylindrical section 11b. The push block 11 is provided with a through hole that runs from left to right, so that oil can flow through the through hole and avoid affecting the movement of the push block 11.

[0044] To facilitate the flow of oil through the oil inlet 6 into the oil passage 3, such as Figure 3 , 4 As shown in Figure 7, the outer wall of the valve core 2 is recessed at the oil passage hole 3 to form an annular oil passage groove 16. The annular oil passage groove 16 connects the oil inlet hole 6 and the oil passage hole 3. When the valve core 2 is installed, the oil passage hole 3 does not need to be aligned with the oil inlet hole 6.

[0045] To further facilitate the flow of oil through the oil inlet 3 into the oil passage 3, such as... Figure 3 , 4 As shown in Figure 6, the valve body 1 is provided with a mounting hole 17 for installing the valve core 2. The mounting hole 17 is recessed in the side wall of the annular oil passage groove 16 to form an annular oil passage groove 2 18. The annular oil passage groove 2 18 connects the oil inlet hole 6 and the annular oil passage groove 16, and the width of the annular oil passage groove 2 18 is smaller than the width of the annular oil passage groove 16.

[0046] Furthermore, the valve body 1 is provided with a through hole that passes through both the left and right ends. The through hole includes an assembly hole 23, a mounting hole 17, and a threaded hole 24. Both the assembly hole 23 and the mounting hole 17 are round holes, and the diameter of the assembly hole 23 is larger than the diameter of the mounting hole 17, while the diameter of the mounting hole 17 is smaller than the minor diameter of the threaded hole 24. The push block 11 is slidably disposed in the assembly hole 23, and the right end of the assembly hole 23 limits the push block 11 to the right. The assembly hole 23 and the mounting hole 17 on the left side of the valve core 2 form the oil passage cavity 5.

[0047] Structure of guide member 8a: A plane 25 is provided on the outer wall of the guide member 8a, and an oil passage 26 is formed between the plane 25 and the wall of the mounting hole 17. There are two or more planes 25. In this embodiment, there are four planes 25.

[0048] The specific structure of the oil outlet 7 and the oil inlet 6: The valve body 1 is a cuboid. The oil outlet 7 is arranged vertically and is located in the lower half of the valve body 1. The oil inlet 6 includes a vertical hole 6a and a longitudinal hole 6b. The vertical hole 6a is located in the lower half of the valve body 1, and the longitudinal hole 6b is located in the rear half of the valve body 1. The longitudinal hole 6b connects the vertical hole 6a with the annular oil groove 18.

[0049] To prevent oil leakage, the end of the longitudinal hole 6b away from the annular oil groove 18 is sealed with an internal hexagonal plug.

[0050] To prevent oil leakage between the valve core 2 and the valve body 1, an O-ring 19 is provided between the valve core 2 and the valve body 1, which is fitted outside the valve core 2. There are two O-rings 19, which are located on the left and right sides of the annular oil groove 16 respectively.

[0051] The installation structure of O-ring 19: The outer wall of the valve core 2 is recessed to form two annular mounting grooves, and the O-ring 19 is installed in the corresponding annular mounting grooves respectively.

[0052] In order to filter the oil entering the oil inlet 6, such as Figure 2 , 3 As shown in Figures 6 and 7, the outer surface of the valve body 1 is recessed at the outer end of the oil inlet hole 6 to form an installation groove 20. A filter cap 21 is provided in the installation groove 20 and fixed by an O-ring 22. The O-ring 22 is located between the side wall of the installation groove 20 and the filter cap 21. The structure is simple and easy to process and install.

[0053] The specific structure of filter cap 21 is as follows: Figure 2 , 7 As shown, the filter cap 21 includes a circular main body covering the oil inlet 6 and an annular mounting part for supporting the circular main body. The filter cap 21 is provided with a plurality of filter holes, and the O-ring 22 is disposed between the side wall of the mounting groove 20 and the annular mounting part.

[0054] Furthermore, the filter cap 21 is formed by bending a metal plate with filter holes.

[0055] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A solenoid valve, comprising an electromagnet and a valve body (1) disposed to the right of the electromagnet, wherein the valve body (1) contains a valve core (2) whose axis is arranged laterally, characterized in that: The valve core (2) is provided with an oil passage hole 1 (3), the axis of which is perpendicular to the axis of the valve core (2). The valve core (2) is provided with an oil passage hole 2 (4) located to the left of the oil passage hole 1 (3), the axis of which is on the same straight line as the axis of the valve core (2), and the oil passage hole 2 (4) is connected to the oil passage hole 1 (3), forming an oil passage cavity (5) on the left side of the valve core (2) that is connected to the oil passage hole 2 (4). The valve body (1) is provided with an oil inlet hole (6) connected to the oil passage hole 1 (3) and an oil passage cavity (5). The oil outlet (7) is provided with a plug (8) in the oil passage cavity (5). The right end of the plug (8) is a cone shape for sealing the second oil passage (4). A return spring (9) is provided between the plug (8) and the valve core (2). When the moving iron core of the electromagnet extends, it pushes the plug (8) to move to the right and compresses the return spring (9), and the plug (8) seals the second oil passage (4). When the moving iron core of the electromagnet retracts, the plug (8) moves to the left under the elastic force of the return spring (9), and the plug (8) leaves the second oil passage (4).

2. The solenoid valve according to claim 1, characterized in that: The valve core (2) has a threaded section (10) that is screwed to the valve body (1) at the right end. The valve body (1) has a push block (11) located on the left side of the plug (8). A pressure regulating spring (12) is provided between the plug (8) and the push block (11). Rotating the threaded section (10) can adjust the elastic force of the pressure regulating spring (12).

3. A solenoid valve according to claim 2, characterized in that: The right end of the threaded section (10) extends out of the valve body (1) and is screwed with a locking nut (13). The right end face of the threaded section (10) is recessed to form an internal hexagonal groove (14).

4. A solenoid valve according to claim 2, characterized in that: The right end face of the push block (11) is recessed to form a guide groove (15). The plug (8) includes a guide (8a) slidably disposed in the valve body (1), a sealing member (8b) disposed at the right end of the guide (8a), and a guide post (8c) disposed at the left end of the guide (8a). The right end of the sealing member (8b) is conical for sealing the oil passage hole 2 (4), and the reset spring (9) is fitted on the outside of the sealing member (8b). The left end of the pressure regulating spring (12) is disposed in the guide groove (15), and the right end is fitted on the outside of the guide post (8c).

5. A solenoid valve according to claim 1, characterized in that: The outer wall of the valve core (2) is recessed at the oil passage hole (3) to form an annular oil passage groove (16), which connects the oil inlet hole (6) and the oil passage hole (3).

6. A solenoid valve according to claim 5, characterized in that: The valve body (1) is provided with a mounting hole (17) for installing the valve core (2). The mounting hole (17) is recessed in the side wall of the annular oil groove one (16) to form an annular oil groove two (18). The annular oil groove two (18) connects the oil inlet hole (6) and the annular oil groove one (16), and the width of the annular oil groove two (18) is smaller than the width of the annular oil groove one (16).

7. A solenoid valve according to claim 5, characterized in that: There are two O-rings (19) fitted on the outside of the valve core (2) and the valve body (1), respectively located on the left and right sides of the annular oil groove (16).

8. A solenoid valve according to claim 1, characterized in that: The outer surface of the valve body (1) is recessed at the outer end of the oil inlet hole (6) to form an installation groove (20). A filter cap (21) is provided in the installation groove (20) and fixed by an O-ring (22). The O-ring (22) is located between the side wall of the installation groove (20) and the filter cap (21).

Images