Large flow tee proportional pressure reducing valve

Abstract

The utility model provides a big flow three -way proportional pressure reducing valve, including valve body, the inside of valve body is provided with round hole, and round hole is fixedly connected with first support cylinder in it, the side wall of first support cylinder is provided with coil, the inside of round hole is provided with sleeve, and the side wall of sleeve and the inner wall of round hole are set up in conjunction, the inside of sleeve is slidingly matched with movable sleeve, the inside fixed connection of movable sleeve has second support cylinder, the side wall fixed connection of second support cylinder has magnet, the side wall of valve body is provided with import, first export and second export, the side wall of sleeve is seted up with first hole and second hole, the side wall of movable sleeve is seted up with long hole, and with the sliding of movable sleeve, long hole is communicated with first hole, second hole alone or simultaneously. The utility model places coil and so on action structure in the inside of valve body, is favorable to reducing the volume, improves the heat dissipation capacity of coil.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, and in particular to a high-flow three-way proportional pressure reducing valve. Background Technology

[0002] A three-way proportional pressure reducing valve is a hydraulic component that adjusts pressure proportionally via electrical signal control. It is widely used in industrial automation, engineering machinery, and fluid control systems. By controlling the opening and closing degree of the valve core, the ratio of the flow area between the working port and the return port is adjusted, thereby achieving pressure reduction and control.

[0003] In existing three-way proportional pressure reducing valves, the control structure, including the coil and armature, is generally located on one side of the valve body (in electronic expansion valves, the coil is inside the valve body, but the fluid does not pass through the coil). This results in a relatively fixed size and angle in one direction of the valve body. Although the coil can operate at temperatures such as 130℃, 155℃, and 180℃ depending on the insulation class, the three-way proportional pressure reducing valve is a continuously energized solenoid valve, making coil heat dissipation crucial. Adding a heat dissipation structure would further increase the overall valve body size; therefore, passive heat dissipation is generally achieved through the outer shell of the coil. Utility Model Content

[0004] To address the aforementioned problems, this utility model discloses a high-flow-rate three-way proportional pressure reducing valve, comprising a valve body with a circular hole inside. A first support cylinder is fixedly connected to the circular hole, and a coil is disposed on the side wall of the first support cylinder. The first support cylinder is hollow, with one end open and the other end having several overflow holes on its side wall. The coil is fixed inside the circular hole by means of the first support cylinder.

[0005] A sleeve is installed inside the circular hole, with the sidewall of the sleeve fitting snugly against the inner wall of the circular hole. A movable sleeve is slidably fitted inside the sleeve, and a second support cylinder is fixedly connected inside the movable sleeve. A magnet is fixedly connected to the sidewall of the second support cylinder. It is important to note that the flatness of the inner wall of the sleeve and the circumferential sidewall of the movable sleeve should not exceed 0.9 μm, and the roughness should not exceed 0.2 μm. Furthermore, the sleeve and the movable sleeve should maintain a transition fit. When the coil is energized, it generates a magnetic field, which interacts with the magnet to push the movable sleeve to slide. Deformation caused by temperature changes during operation ensures smooth sliding of the movable sleeve. The fit between the sleeve and the movable sleeve also takes into account temperature variations.

[0006] The valve body has an inlet, a first outlet, and a second outlet on its side wall. The sleeve has a first hole and a second hole on its side wall. The first hole communicates with the first outlet, and the second hole communicates with the second outlet. The movable sleeve has an elongated hole on its side wall. As the movable sleeve slides, the elongated hole communicates with the first hole and the second hole, either alone or simultaneously. The inlet communicates with the chamber at one end of the first support cylinder. By controlling the coil, the position of the movable sleeve is controlled, i.e., the conductivity between the elongated hole and the first and second holes is controlled, thereby achieving pressure reduction.

[0007] Furthermore, the fluid enters the circular hole from the inlet. At this time, the fluid passes through the gap between the second support cylinder and the coil, or through the inside of the first support cylinder, and exits through the overflow hole. Finally, it converges into the inside of the movable sleeve and then passes through the elongated hole. During the process, the fluid can dissipate heat from the coil in the flow path described above.

[0008] Preferably, a second bolt is inserted through one end of the interior of the first support cylinder, and the second bolt is threadedly connected to the valve body. The first support cylinder is fixed by the second bolt.

[0009] Preferably, a plurality of third bolts are inserted at one end of the movable sleeve, and the third bolts are threadedly connected to the second support cylinder. The second support cylinder and the movable sleeve are fixed together by the third bolts.

[0010] Preferably, an end cap is provided on one side of the valve body, and a support sleeve is provided on one side of the end cap, with the support sleeve abutting against the end of the sleeve. The end cap seals the circular through hole.

[0011] Preferably, a column is inserted through the end cap, with a cable fixedly connected to one end of the column and a spring pin fixedly connected to the other end. The spring pin contacts a pre-set contact at one end of the first support cylinder, and the contact is electrically connected to the coil. The spring pin provides power to the coil. Furthermore, to improve insulation performance, the spring pin structure is omitted, and a cable is led out from the spring pin, with the cable end welded to the contact. Finally, insulating paint is sprayed on to improve the valve's insulation performance.

[0012] Preferably, a convex ring is fixedly connected to the side wall of the column, a fixing nut is threaded onto the column, and the end cap is located between the convex ring and the fixing nut. The column is fixedly connected to the end cap by the convex ring and the fixing bolt.

[0013] Preferably, a limiting spring is provided inside the circular hole, with one end of the limiting spring abutting against the movable sleeve and the other end abutting against the convex ring. That is, under the action of the limiting spring, the coil is not energized, the elongated hole and the second hole remain connected, and the first hole remains closed.

[0014] Preferably, each of the four corners of the end cap is provided with a first bolt, which is threadedly connected to the valve body. The end cap is fixed to the valve body by the first bolts.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. Placing the coil, magnet, and other moving structures inside the valve body helps reduce the magnetism of the entire valve body, making the entire valve body more regular.

[0017] 2. During operation, fluid can flow through the inside of the first support cylinder or through the gap between the coil and the second support cylinder. The fluid carries away the heat generated by the coil, thus dissipating heat and ensuring stable valve operation. The fluid here is hydraulic oil, and the suitable operating temperature of hydraulic oil is 30-60℃, which meets the heat dissipation requirements of the coil. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 This is a cross-sectional view of the present invention.

[0020] List of reference numerals in the attached diagram:

[0021] 1. Valve body; 2. End cap; 3. Fixing nut; 4. First bolt; 5. Cable; 6. Second bolt; 7. Sleeve; 8. Overflow hole; 9. Movable sleeve; 10. Magnet; 11. Coil; 12. First support cylinder; 13. Second support cylinder; 14. Spring pin; 15. Limiting spring; 16. Column; 17. Convex ring; 18. Inlet; 19. First outlet; 20. First hole; 21. Long hole; 22. Second outlet; 23. Second hole. Detailed Implementation

[0022] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0023] like Figures 1 to 2 As shown, a high-flow-rate three-way proportional pressure reducing valve is described. Note that... Figure 2The black areas in the middle are all sealing structures, such as sealing rings, including valve body 1. Valve body 1 has an overall rectangular structure. A circular hole is provided inside the valve body 1. The circular hole is horizontally arranged and located at the bottom of the valve body 1. A first support cylinder 12 is fixedly connected in the circular hole. The first support cylinder 12 and the circular hole are arranged coaxially. A coil 11 is provided on the side wall of the first support cylinder 12. The coil 11 generates a magnetic field when energized. The first support cylinder 12 is hollow and open at one end. Several overflow holes 8 are provided on the side wall of the other end. That is, fluid, such as hydraulic oil, can pass through the inside of the first support cylinder 12 and finally flow out from the overflow holes 8.

[0024] A sleeve 7 is installed inside the circular hole. Sealing rings are installed at both ends of the sleeve 7, and the sealing rings contact the inner wall of the circular hole. The side wall of the sleeve 7 is also fitted against the inner wall of the circular hole. A movable sleeve 9 is slidably fitted inside the sleeve 7. Similarly, sealing rings are installed on the side walls at both ends of the movable sleeve 9. A second support cylinder 13 is fixedly connected inside the movable sleeve 9, meaning the movable sleeve 9 and the second support cylinder 12 move together. A magnet 10 is fixedly connected to the side wall of the second support cylinder 13. When the coil 11 is energized, a magnetic field is generated, which interacts with the magnet 10, thereby pushing the movable sleeve 9 to move. Requirements are placed on the machining accuracy and fit accuracy of the contact surfaces of the sleeve 7 and the movable sleeve 9 to ensure a good seal between them after the sleeve 7 and the movable sleeve 9 are fitted together, provided that the movable sleeve 9 can slide.

[0025] It should be noted that the first support cylinder 12 is made of plastic or metal, preferably metal, while the second support cylinder 12 is made of plastic, and the movable sleeve 9 is made of metal, indicating that a magnetic shielding sleeve can be provided on the inner wall of the movable sleeve 9. Of course, the magnet 10 can also be replaced with an armature.

[0026] The valve body 1 has an inlet 18, a first outlet 19, and a second outlet 22 on its side wall. The inlet 18 is for fluid entry, and the first outlet 19 and the second outlet 22 are for fluid exit. One of them is used for reflux, and the other is connected to related equipment. According to the needs of the equipment, the ratio of fluid flowing out from the first outlet 19 and the second outlet 22 can be adjusted to achieve the pressure reduction requirement. The sleeve 7 has a first hole 20 and a second hole 23 on its side wall. The first hole 20 is connected to the first outlet 19, and the second hole 23 is connected to the second outlet 22. The movable sleeve 9 has an elongated hole 21 on its side wall. As the movable sleeve 9 slides, the elongated hole 21 is connected to the first hole 20 and the second hole 23, either alone or simultaneously. The inlet 18 is connected to the chamber at one end of the first support cylinder 12. The position of the movable sleeve 9 controls the opening and closing degree of the elongated hole 21 and the first hole 20 and the second hole 23 to achieve the pressure reduction setting.

[0027] Furthermore, the fluid enters from the inlet 18 and then passes through the gap between the second support cylinder 13 and the coil 11, or the fluid enters the inner wall from the open end of the first support cylinder 12 and is sent out from the overflow hole 8. In both flow methods, the fluid enters the interior of the movable sleeve 9 and finally passes out from the elongated hole 23. During the process, the fluid can carry the heat on the coil 11, thus realizing the heat dissipation of the coil.

[0028] A second bolt 6 is inserted through one end of the interior of the first support cylinder 12, and the second bolt 6 is threadedly connected to the valve body 1. The first support cylinder 12 is fixed to the valve body 1 by means of the second bolt 6.

[0029] Several third bolts are inserted at one end of the movable sleeve 9, and the third bolts are threadedly connected to the second support cylinder 13. Similarly, the second support cylinder 13 and the movable sleeve 8 are fixedly connected by the third bolts.

[0030] An end cap 2 is provided on one side of the valve body 1. It should be noted that a sealing ring is provided between the end cap 2 and the valve body 1. A support sleeve is provided on one side of the end cap 2, and the support sleeve abuts against the end of the sleeve 7. After the end cap 2 is installed, the support sleeve abuts against the sleeve 7. At this time, the sealing ring on the sleeve 7 is squeezed, which improves the sealing performance between the end of the sleeve 7 and the end of the sleeve 7.

[0031] A column 16 is inserted into the end cap 2. One end of the column 16 is fixedly connected to a cable 5, and the other end of the column 16 is fixedly connected to a spring pin 14. The coil 6 is electrically connected to the spring pin 14. The spring pin 14 contacts a preset contact at one end of the first support cylinder 12, and the contact is electrically connected to the coil 11. The coil 11 is powered through the spring pin 14 and the contact. This valve is used for the distribution of insulating fluids. If the fluid is not insulating, or if the working environment requires higher electrical performance, the connection between the contact and the coil 11 is canceled, and the cable 5 and the coil 11 are directly welded together and coated with conformal coating.

[0032] A protruding ring 17 is fixedly connected to the side wall of the column 16. Note that there are two grooves on the protruding ring 17, and the grooves are filled with sealing rings. A fixing nut 3 is threadedly connected to the column 16, and the end cap 2 is located between the protruding ring 17 and the fixing nut 3. Remember that the clamping and fixing of the protruding ring 17 and the fixing nut 3 not only fixes the column 16 to the end cap 2, but also presses the sealing ring to achieve a seal between the column 16 and the end cap 2.

[0033] A limiting spring 15 is installed inside the circular hole. One end of the limiting spring 15 abuts against the movable sleeve 9, and the other end abuts against the convex ring 17. The limiting spring 15 sets the initial position of the movable sleeve 9. Furthermore, the force generated by the energization of the coil 11 adjusts the position of the movable sleeve 9. Moreover, if the fixing nut 3 loosens, the sealing ring on the convex ring 17 will maintain a certain pre-tightness under the action of the limiting spring 15, thus providing a certain sealing capacity and reducing fluid leakage.

[0034] Each of the four corners of the end cap 2 is provided with a first bolt 4, which is threadedly connected to the valve body 1. That is, the end cap 2 is fixed to the valve body 1 by means of the first bolt 4.

[0035] Furthermore, although a filter structure is installed in the pipeline, solid particles may still impact the surface of coil 11, causing damage to the insulating varnish. Therefore, in order to improve electrical performance, a protective sleeve needs to be installed on the outside of coil 11.

[0036] In addition, the heat generated by coil 11 will cause the temperature of the fluid to rise. If the fluid medium is hydraulic oil, the temperature of the hydraulic oil will also rise due to friction and high pressure in high-intensity operation scenarios. To ensure stable heat dissipation of coil 11 and stable fluid operation, a fluid cooling device needs to be installed in the system.

[0037] The technical means disclosed in this utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A high-flow-rate three-way proportional pressure reducing valve, characterized in that, Includes a valve body (1), the valve body (1) has a circular hole inside, and a first support cylinder (12) is fixedly connected in the circular hole. A coil (11) is provided on the side wall of the first support cylinder (12). The first support cylinder (12) is hollow and has an opening at one end, and several overflow holes (8) are provided on the side wall at the other end. A sleeve (7) is provided inside the circular hole, and the side wall of the sleeve (7) is fitted to the inner wall of the circular hole. A movable sleeve (9) is slidably fitted inside the sleeve (7). A second support cylinder (13) is fixedly connected inside the movable sleeve (9), and a magnet (10) is fixedly connected to the side wall of the second support cylinder (13). The valve body (1) has an inlet (18), a first outlet (19) and a second outlet (22) on its side wall. The sleeve (7) has a first hole (20) and a second hole (23) on its side wall. The first hole (20) is connected to the first outlet (19), and the second hole (23) is connected to the second outlet (22). The movable sleeve (9) has an elongated hole (21) on its side wall. As the movable sleeve (9) slides, the elongated hole (21) is connected to the first hole (20) and the second hole (23) alone or simultaneously. The inlet (18) is connected to the chamber at one end of the opening of the first support cylinder (12).

2. The high-flow-rate three-way proportional pressure reducing valve according to claim 1, characterized in that: A second bolt (6) is inserted through one end of the first support cylinder (12), and the second bolt (6) is threadedly connected to the valve body (1).

3. The high-flow-rate three-way proportional pressure reducing valve according to claim 1, characterized in that: Several third bolts are inserted at one end of the movable sleeve (9), and the third bolts are threadedly connected to the second support cylinder (13).

4. The high-flow-rate three-way proportional pressure reducing valve according to claim 1, characterized in that: An end cap (2) is provided on one side of the valve body (1), and a support sleeve is provided on one side of the end cap (2), and the support sleeve abuts against the end of the sleeve (7).

5. A high-flow-rate three-way proportional pressure reducing valve according to claim 4, characterized in that: A column (16) is inserted through the end cap (2). A cable (5) is fixedly connected to one end of the column (16), and a spring pin (14) is fixedly connected to the other end of the column (16). The spring pin (14) contacts a preset contact point at one end of the first support cylinder (12), and the contact point is electrically connected to the coil (11).

6. A high-flow-rate three-way proportional pressure reducing valve according to claim 5, characterized in that: The side wall of the column (16) is fixedly connected with a protruding ring (17), and a fixing nut (3) is threaded onto the column (16), and the end cap (2) is located between the protruding ring (17) and the fixing nut (3).

7. A high-flow-rate three-way proportional pressure reducing valve according to claim 6, characterized in that: A limiting spring (15) is installed inside the circular hole. One end of the limiting spring (15) abuts against the movable sleeve (9), and the other end abuts against the protruding ring (17).

8. A high-flow-rate three-way proportional pressure reducing valve according to claim 4, characterized in that: The end cap (2) is provided with first bolts (4) at each of its four corners, and the first bolts (4) are threadedly connected to the valve body (1).

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