Dustproof proportional valve

Abstract

The utility model discloses a dustproof proportional valve which comprises a valve body, an electromagnetic device, a pipe body, a supporting seat and an electromagnet, the bottom end of the electromagnetic device corresponds to the electromagnet, a second protection mechanism is arranged on the periphery of the electromagnet, and two corresponding first protection mechanisms are arranged on the periphery of the second protection mechanism; a positioning ring is fixedly connected to the bottom end of the electromagnetic device and corresponds to the valve seat, a positioning groove is formed in the bottom end of the positioning ring and is annular, the first protection mechanism is located between the valve seat and the positioning ring, and the upper end of the first protection mechanism is inserted into the positioning groove. External dust and sundries are isolated through the two tightly attached protection plates, a large amount of external dust and sundries are prevented from being attached to the magnet, the electromagnetic effect of the electromagnet is guaranteed, meanwhile, dust prevention is further conducted on the electromagnet and the reset spring through the protection cover and the telescopic cylinder, and therefore the overall regulation and control effect of the proportional valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to a dustproof proportional valve, belonging to the technical field of proportional valves. Background Art

[0002] The full name of the proportional valve is the electro-hydraulic proportional valve. It is a hydraulic valve that converts the input electrical signal into force or displacement in proportion, thereby continuously controlling parameters such as pressure and flow. The proportional valve consists of two parts: a DC proportional solenoid and a hydraulic valve. The hydraulic valve part is not much different from a general hydraulic valve, but the DC proportional solenoid is different from the electromagnet used in a general solenoid valve. The use of a proportional solenoid can obtain a displacement output and a suction output proportional to a given current.

[0003] The electromagnets and return compression springs in some existing electric proportional valves are not well protected, which causes dust and debris in the air to easily get stuck between the return springs and on the electromagnets. When there is a lot of dust, it will affect the electromagnetic strength. The return spring is also easily stuck due to the influence of debris, which in turn affects the overall control effect of the proportional valve. Utility Model Content

[0004] The purpose of the present utility model is to provide a dustproof proportional valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dustproof proportional valve, comprising a valve body, an electromagnetic device, a tube body, a support seat and an electromagnet, the bottom end of the electromagnetic device corresponds to the electromagnet, a second protective mechanism is provided around the electromagnet, and two corresponding first protective mechanisms are provided around the second protective mechanism; a positioning ring is fixedly connected to the bottom end of the electromagnetic device, the positioning ring corresponds to the valve seat, a positioning groove is provided at the bottom end of the positioning ring, and the positioning groove is annular, the first protective mechanism is located between the valve seat and the positioning ring, and the upper end of the first protective mechanism is inserted into the positioning groove.

[0006] Preferably, the two first protective mechanisms both include a protective plate, a clamping block, an inserting plate, a clamping groove, an installation slot, a plurality of compression springs, a plurality of inserting rods and a plurality of slots, the clamping block and the protective plate are both arranged in an arc shape, a clamping groove is provided on the inner side of the clamping block, the clamping block is clamped on the outer side of the valve seat through the clamping groove, the upper end of the clamping block is fixedly connected to the protective plate, the protective plate is located at the periphery of the second protective mechanism, the upper end of the protective plate is provided with a mounting groove, the bottom wall of the installation slot is provided with a plurality of slots, the upper end of the inserting plate is movably inserted in the positioning groove, the bottom end of the inserting plate is movably inserted in the installation slot, the bottom end of the inserting plate is fixedly connected to a plurality of inserting rods, the plurality of inserting rods are respectively movably inserted in a plurality of slots, a plurality of compression springs are fixedly connected between the bottom end of the inserting plate and the bottom wall of the installation slot, and the plurality of compression springs are respectively sleeved on the periphery of the plurality of inserting rods.

[0007] Preferably, the second protective mechanism includes a protective cover, a telescopic cylinder, a fixed ring, a plurality of guide blocks and a plurality of guide grooves, the protective cover is located at the bottom end of the electromagnet, the bottom end of the protective cover is fixedly connected to the valve seat, the telescopic cylinder is located inside the protective cover, the bottom end of the telescopic cylinder is fixedly connected to the valve seat, the upper end of the telescopic cylinder is fixedly connected to the fixing ring, the upper end of the fixing ring is tightly fitted with the bottom end of the electromagnet, a plurality of guide blocks are evenly fixed on the outside of the fixing ring, a plurality of guide grooves adapted to the guide blocks are evenly provided on the inside of the protective cover, and the plurality of guide blocks are all slidably connected to the corresponding guide grooves.

[0008] Preferably, the outer sides of the upper ends of the two plug-in plates are fixedly connected with fixing blocks, and the two fixing blocks are located between the positioning ring and the protective plate.

[0009] Preferably, the protective cover is located between two protective plates, and the diameter of the protective cover is larger than the diameter of the electromagnet.

[0010] Compared with the prior art, the beneficial effects of the present invention are: external dust and debris are isolated by two tightly fitting protective plates, preventing a large amount of external dust and debris from adhering to the magnet, thereby ensuring the electromagnetic effect of the electromagnet; at the same time, the protective cover and the telescopic cylinder further protect the electromagnet and the return spring from dust, thereby ensuring the overall control effect of the proportional valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the internal structure of the protective plate of the present utility model;

[0013] Figure 3 This is a schematic structural diagram of the first protection mechanism of the present utility model;

[0014] Figure 4 This is a schematic diagram of the connection structure between the protective plate and the plug plate of the utility model;

[0015] Figure 5 This is a schematic cross-sectional view of the second protection mechanism of the present invention;

[0016] Figure 6 This is a schematic structural diagram of the second protection mechanism of the present utility model.

[0017] In the figure: 1. Valve body; 11. Electromagnetic device; 12. Tube body; 13. Support seat; 14. Valve seat; 15. Electromagnet; 2. First protective mechanism; 21. Protective plate; 22. Clamping block; 23. Insert plate; 24. Compression spring; 25. Insert rod; 26. Slot; 27. Clamping groove; 28. Mounting groove; 3. Second protective mechanism; 31. Protective cover; 32. Telescopic cylinder; 33. Fixing ring; 34. Guide block; 35. Guide groove; 4. Positioning groove; 5. Positioning ring; 6. Fixing block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-6 The utility model provides a technical solution: a dust-proof proportional valve, including a valve body 1, an electromagnetic device 11, a tube body 12, a support seat 13 and an electromagnet 15, the bottom end of the electromagnetic device 11 corresponds to the electromagnet 15, a second protective mechanism 3 is provided on the periphery of the electromagnet 15, and two corresponding first protective mechanisms 2 are provided on the periphery of the second protective mechanism 3; the bottom end of the electromagnetic device 11 is fixedly connected to a positioning ring 5, the positioning ring 5 corresponds to the valve seat 14, the bottom end of the positioning ring 5 is provided with a positioning groove 4, the positioning groove 4 is annular, the first protective mechanism 2 is located between the valve seat 14 and the positioning ring 5, the upper end of the first protective mechanism 2 is inserted in the positioning groove 4, and two tightly fitting protective plates 21 are used to isolate external dust and debris, prevent a large amount of external dust and debris from adhering to the magnet, and ensure the electromagnetic effect of the electromagnet 15. At the same time, the protective cover 31 and the telescopic cylinder 32 further prevent dust from the electromagnet 15 and the return spring, thereby ensuring the overall control effect of the proportional valve.

[0020] The two first protection mechanisms 2 each include a protection plate 21, a clamping block 22, an inserting plate 23, a clamping groove 27, a mounting groove 28, a plurality of compression springs 24, a plurality of inserting rods 25 and a plurality of slots 26. The clamping block 22 and the protection plate 21 are both set in an arc shape. A clamping groove 27 is provided on the inner side of the clamping block 22. The clamping block 22 is clamped on the outer side of the valve seat 14 through the clamping groove 27. The upper end of the clamping block 22 is fixedly connected to the protection plate 21. The protection plate 21 is located outside the second protection mechanism 3. A mounting groove 28 is provided on the upper end of the protection plate 21. A plurality of slots 26 are provided on the bottom wall of the mounting groove 28. The upper end of the inserting plate 23 is movably inserted in the positioning groove 4. The bottom end of the inserting plate 23 is movably inserted in the mounting groove 28. The bottom end of the inserting plate 23 is fixedly connected to a plurality of inserting rods 25. The plurality of inserting rods 25 The plurality of compression springs 24 are respectively movably inserted into the plurality of slots 26, and a plurality of compression springs 24 are fixedly connected between the bottom end of the plug plate 23 and the bottom wall of the mounting groove 28. The plurality of compression springs 24 are respectively sleeved on the periphery of the plurality of plug rods 25, and the external dust and debris are isolated by two tightly fitting protective plates 21 to prevent a large amount of external dust and debris from adhering to the magnet, thereby ensuring the electromagnetic effect of the electromagnet 15. The bottom end of the protective plate 21 is provided with a clamping block 22, which is clamped on the periphery of the valve seat 14, and the upper end of the protective plate 21 is provided with a plug plate 23. During the installation process, the plug plate 23 is pressed down, and the plug plate 23 is deeply inserted into the mounting groove 28 to squeeze the compression spring 24. When the upper end of the plug plate 23 corresponds to the positioning groove 4, the plug plate 23 is released, and the upper end of the plug plate 23 is compressed by the compression spring The restoring force of the spring 24 is inserted in the positioning groove 4, thereby positioning and installing the protective plate 21, and disassembly and assembly are very convenient; the second protective mechanism 3 includes a protective cover 31, a telescopic cylinder 32, a fixing ring 33, a plurality of guide blocks 34 and a plurality of guide grooves 35, the protective cover 31 is located at the bottom end of the electromagnet 15, the bottom end of the protective cover 31 is fixedly connected to the valve seat 14, the telescopic cylinder 32 is located inside the protective cover 31, the bottom end of the telescopic cylinder 32 is fixedly connected to the valve seat 14, the upper end of the telescopic cylinder 32 is fixedly connected to the fixing ring 33, the upper end of the fixing ring 33 is tightly fitted with the bottom end of the electromagnet 15, a plurality of guide blocks 34 are evenly fixed on the outside of the fixing ring 33, a plurality of guide grooves 35 adapted to the guide blocks 34 are evenly provided on the inside of the protective cover 31, and a plurality of guide blocks 34 are aligned with the corresponding guide grooves 35 sliding connection, the telescopic cylinder 32 is located at the bottom end of the electromagnet 15 and is sleeved on the periphery of the reset spring. The telescopic cylinder 32 is an elastic telescopic cylinder 32, which has a telescopic reset function. The electromagnet 15 and the reset spring are further protected from dust by the protective cover 31 and the telescopic cylinder 32, thereby ensuring the overall control effect of the proportional valve; the outer sides of the upper ends of the two plug-in plates 23 are fixedly connected with fixed blocks 6, and the two fixed blocks 6 are located between the positioning ring 5 and the protective plate 21. The operator can press down the plug-in plates 23 through the fixed blocks 6; the protective cover 31 is located between the two protective plates 21, and the diameter of the protective cover 31 is larger than the diameter of the electromagnet 15, ensuring that the electromagnet 15 can move downward through the electromagnetic device 11, preventing the protective cover 31 from obstructing the electromagnet 15.

[0021] Specifically, when the present invention is used, the two symmetrical protective plates 21 are both arc-shaped and spliced to form a cylinder. The battery iron is located between the two protective plates 21. The two tightly fitting protective plates 21 isolate external dust and debris, preventing a large amount of external dust and debris from adhering to the magnet, and ensuring the electromagnetic effect of the electromagnet 15. The bottom end of the protective plate 21 is provided with a clamping block 22, which is clamped on the periphery of the valve seat 14. The upper end of the protective plate 21 is provided with an inserting plate 23. During the installation process, the inserting plate 23 is pressed down, and the inserting plate 23 penetrates into the installation groove 28 to squeeze the compression spring 24. When the inserting plate 23 is on When the upper end corresponds to the positioning groove 4, the plug plate 23 is released, and the upper end of the plug plate 23 is inserted into the positioning groove 4 by the restoring force of the compression spring 24, so that the protective plate 21 is positioned and installed, and the disassembly and assembly are very convenient; at the same time, a protective cover 31 is provided between the two protective plates 21, and a telescopic cylinder 32 is provided inside the protective cover 31. The telescopic cylinder 32 is located at the bottom end of the electromagnet 15 and is sleeved on the periphery of the reset spring. The telescopic cylinder 32 is an elastic telescopic cylinder 32, which has a telescopic reset function. The electromagnet 15 and the reset spring are further protected from dust by the protective cover 31 and the telescopic cylinder 32, thereby ensuring the overall control effect of the proportional valve.

[0022] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dustproof proportional valve, comprising a valve body (1), an electromagnetic device (11), a pipe body (12), a support seat (13) and an electromagnet (15), characterized in that: The bottom end of the electromagnetic device (11) corresponds to the electromagnet (15), and a second protective mechanism (3) is provided on the periphery of the electromagnet (15), and two corresponding first protective mechanisms (2) are provided on the periphery of the second protective mechanism (3); the bottom end of the electromagnetic device (11) is fixedly connected to a positioning ring (5), and the positioning ring (5) corresponds to the valve seat (14). The bottom end of the positioning ring (5) is provided with a positioning groove (4), and the positioning groove (4) is set to be annular. The first protective mechanism (2) is located between the valve seat (14) and the positioning ring (5), and the upper end of the first protective mechanism (2) is inserted into the positioning groove (4).

2. A dustproof proportional valve according to claim 1, characterized in that: The two first protection mechanisms (2) each include a protection plate (21), a clamping block (22), an inserting plate (23), a clamping groove (27), an installation groove (28), a plurality of compression springs (24), a plurality of inserting rods (25) and a plurality of slots (26). The clamping block (22) and the protection plate (21) are both configured in an arc shape. A clamping groove (27) is provided on the inner side of the clamping block (22). The clamping block (22) is clamped on the outer side of the valve seat (14) through the clamping groove (27). The upper end of the clamping block (22) is fixedly connected to the protection plate (21). The protection plate (21) is located on the periphery of the second protection mechanism (3). The protection plate The upper end of the (21) is provided with a mounting groove (28), and the bottom wall of the mounting groove (28) is provided with a plurality of slots (26). The upper end of the plug plate (23) is movably inserted in the positioning groove (4), and the bottom end of the plug plate (23) is movably inserted in the mounting groove (28). The bottom end of the plug plate (23) is fixedly connected with a plurality of plug rods (25), and the plurality of plug rods (25) are movably inserted in the plurality of slots (26). A plurality of compression springs (24) are fixedly connected between the bottom end of the plug plate (23) and the bottom wall of the mounting groove (28), and the plurality of compression springs (24) are respectively sleeved on the periphery of the plurality of plug rods (25).

3. The dustproof proportional valve according to claim 1, characterized in that: The second protective mechanism (3) comprises a protective cover (31), a telescopic cylinder (32), a fixed ring (33), a plurality of guide blocks (34) and a plurality of guide grooves (35), wherein the protective cover (31) is located at the bottom end of the electromagnet (15), the bottom end of the protective cover (31) is fixedly connected to the valve seat (14), the telescopic cylinder (32) is located inside the protective cover (31), the bottom end of the telescopic cylinder (32) is fixedly connected to the valve seat (14), the upper end of the telescopic cylinder (32) is fixedly connected to the fixed ring (33), the upper end of the fixed ring (33) is tightly fitted with the bottom end of the electromagnet (15), the outer side of the fixed ring (33) is evenly fixed with a plurality of guide blocks (34), the inner side of the protective cover (31) is evenly provided with a plurality of guide grooves (35) adapted to the guide blocks (34), and the plurality of guide blocks (34) are all slidably connected to the corresponding guide grooves (35).

4. The dustproof proportional valve according to claim 2, characterized in that: The outer sides of the upper ends of the two inserting plates (23) are fixedly connected with fixing blocks (6), and the two fixing blocks (6) are located between the positioning ring (5) and the protective plate (21).

5. The dustproof proportional valve according to claim 3, characterized in that: The protective cover (31) is located between the two protective plates (21), and the diameter of the protective cover (31) is larger than the diameter of the electromagnet (15).

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