Large-flow two-way cut-off two-way cartridge valve

Abstract

The utility model belongs to the technical field of two-way cartridge valves, and particularly relates to a large-flow two-way cut-off two-way cartridge valve which comprises a main valve, a pilot electromagnetic valve, a cover plate, a first one-way valve and a second one-way valve, and the main valve comprises a main valve sleeve, a main valve element, a main valve spring and a cover gasket; the pilot electromagnetic valve comprises a pilot valve sleeve, a pilot valve element, a pilot reset spring, a pilot cone valve element, an armature, a threaded sleeve and a coil. A first working opening and a second working opening are formed in the side face and the bottom of the main valve respectively, the main valve element is arranged in an axial hole of the main valve sleeve, and the cover gasket is arranged at one end of the main valve sleeve. The problem that the pressure maintaining performance is low due to the fact that a valve element is prone to being clamped due to the fact that oil impurities are many in actual use is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of two -way plug -in valve, concretely relates to a big flow two -way stop two -way plug -in valve. BACKGROUND

[0002] At present, the electromagnetic valve with spool valve structure is commonly used as the pilot electromagnetic valve in the existing hydraulic circuit, controls the two -way plug -in valve and realizes the function of one -way pressure maintaining, and if the shuttle valve is added, the two -way pressure maintaining function can be achieved. Since the pilot electromagnetic valve adopts the cylindrical sealing structure, its defect is that the leakage is large after long time of use, and the pressure maintaining function cannot be achieved at all. The shuttle valve is a steel ball structure, and the response time is slow. In actual use, the valve core is easily stuck due to the large amount of impurities in the oil, and the pressure maintaining performance is low. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a big flow two -way stop two -way plug -in valve to solve the problem in the background art.

[0004] In order to solve the above technical problem, the utility model provides the following technical scheme: a big flow two -way stop two -way plug -in valve, including main valve, pilot electromagnetic valve, apron, first check valve and second check valve, the main valve includes main valve sleeve, main valve core, main valve spring and cover pad, the pilot electromagnetic valve includes pilot valve sleeve, pilot valve core, pilot reset spring, pilot cone valve core, armature, screw sleeve and coil, the side surface and bottom of main valve are provided with first working port and second working port respectively, the main valve core is arranged in the axial hole of main valve sleeve, the cover pad is arranged at one end of main valve sleeve, the main valve spring is arranged in the inner hole of main valve core, the apron is fixedly installed on the upper end of cover pad, the axial inner of apron is provided with first damper, and pilot electromagnetic valve, first check valve, second check valve and first damper are sequentially installed in the axial inner of apron.

[0005] The utility model further illustrates that the bottom surface of apron is provided with first control port, second control port and oil return port, the first damper arranged in the axial direction of apron is communicated with main valve spring cavity, the pilot electromagnetic valve is arranged on the axial side of apron, one end of pilot electromagnetic valve is communicated with oil return port, the other end of pilot electromagnetic valve is communicated with first damper, the pilot valve sleeve is arranged in the valve hole.

[0006] The utility model further illustrates that the pilot valve core is arranged in the pilot valve sleeve, the pilot cone valve core is arranged in the pilot valve core, the pilot reset spring is arranged in the inside between pilot valve core and pilot cone valve core, the screw sleeve is installed on the upper end of pilot valve sleeve, the pilot reset spring is installed between armature and screw sleeve, one end of armature is provided with T -shaped groove, and pilot cone valve core is connected with armature through T -shaped groove, the axial inner of armature is provided with pilot spring, and the coil sleeve is connected to one end of screw sleeve.

[0007] The utility model further illustrates, first check valve and second check valve all include screw cover, check valve sleeve, check valve core and spring,

[0008] The first check valve is arranged on the axial side of the cover plate, a second damping is connected above the first control port, one end of the first check valve is in communication with the second damping and the first control port, the check valve sleeve is arranged in the valve hole, the check valve core is arranged in the check valve sleeve, the spring is arranged in the check valve core, the screw sleeve is arranged at one end of the check valve sleeve, and one end of the first check valve is in communication with the pilot electromagnetic valve and the first damping.

[0009] The utility model further illustrates, the second check valve is arranged on the axial other side of the cover plate, one end of the second check valve is in communication with a third damping and a second control port, and the check valve sleeve is also arranged in the valve hole, the screw cover is arranged at the other end of the check valve sleeve, and one end of the second check valve is in communication with the pilot electromagnetic valve and the first damping.

[0010] Compared with the prior art, the utility model has the advantages that: the utility model adopts the sliding structure, the valve core and the valve seat adopt the conical sealing structure, and the work is reliable and stable; the pilot valve adopts the threaded plug-in structure, the valve core and the valve seat adopt the conical sealing structure, solve the long time use without leakage and play the role of pressure maintaining; the valve core is not easy to jam, and the reversing is not flexible, the purpose of long service life is realized, the structure is simple, the work is reliable, there is no leakage, the pressure maintaining performance is good, there is no clamping phenomenon, the service life is long, and the utility model is widely used in the high-pressure leakage-free pressure-maintaining circuit bidirectional stop two-way plug-in valve equipment. BRIEF DESCRIPTION OF DRAWINGS

[0011] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model.In the drawings:

[0012] Fig. 1 It is the structure schematic view of a kind of large-flow bidirectional stop two-way plug-in valve of the utility model.

[0013] Fig. 2 It is the sectional view of a kind of large-flow bidirectional stop two-way plug-in valve of the utility model.

[0014] Fig. 3 It is the principle diagram of a kind of large-flow bidirectional stop two-way plug-in valve of the utility model;

[0015] In the figure: 1, main valve sleeve; 2, main valve core; 3, main valve spring; 4, cover gasket; 5, oil return port; 6, first damping; 7, pilot valve sleeve; 8, pilot valve core; 9, pilot reset spring; 10, pilot cone valve core; 11, armature; 12, pilot spring; 13, coil; 14, screw sleeve; 15, pilot solenoid valve; 16, first check valve; 17, screw cap; 18, spring; 19, check valve core; 20, check valve sleeve; 21, second damping; 22, first control port; 23, main valve spring cavity; 24, main valve; 25, first working port; 26, second working port; 27, second check valve; 28, cover plate; 29, third damping; 30, second control port. DETAILED DESCRIPTION

[0016] The technical scheme of the utility model will be further described in detail below in combination with preferred embodiments and drawings thereof. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0017] Please refer to Figs. 1-3 The utility model provides technical scheme: a big flow two-way cut-off two-way cartridge valve, including main valve 24, pilot solenoid valve 15, cover plate 28, first check valve 16 and second check valve 27, main valve 24 is by main valve sleeve 1, main valve core 2, main valve spring 3 and cover gasket 4 constitute;

[0018] Pilot solenoid valve 15 is by pilot valve sleeve 7, pilot valve core 8, pilot reset spring 9, pilot cone valve core 10, armature 11, screw sleeve 17 and coil 13 constitute;

[0019] First check valve 16 is by screw cap 17, check valve sleeve 20, check valve core 19 and spring 18 constitute;Second check valve 27 is by screw cap 17, check valve sleeve 20, check valve core 19 and spring 18 constitute;

[0020] The side of the main valve 24 is provided with a first working port 25 and a second working port 26, the axial hole of the main valve sleeve 1 is provided with the main valve core 2, one end of the main valve sleeve 1 is provided with the cover gasket 4, the inner hole of the main valve core 2 is provided with the main valve spring 3, the upper end of the cover gasket 4 is provided with the cover plate 28, the cover plate 28 is axially provided with the pilot electromagnetic valve 15, the first one-way valve 16, the second one-way valve 27 and the first damping 6, the bottom surface of the cover plate 28 is provided with the first control port 22, the second control port 30 and the oil return port 5, the cover plate 28 is axially provided with the first damping 6 which is communicated with the main valve spring cavity 23, the pilot electromagnetic valve 15 is arranged on one side of the cover plate 28 in the axial direction, one end of the pilot electromagnetic valve 15 is communicated with the oil return port 5, one end of the pilot electromagnetic valve 15 is communicated with the first damping 6, the pilot valve sleeve 7 is arranged in the valve hole, the pilot valve sleeve 7 is provided with the pilot valve core 8, the pilot valve core 8 is provided with the pilot spool 10, and the pilot reset spring 9 is arranged between the pilot valve core 8 and the pilot spool 10;

[0021] One end of the pilot valve sleeve 7 is provided with a screw sleeve 14, the armature 11 and the screw sleeve 14 are arranged with the spring 18, one end of the armature 11 is provided with a T-shaped groove, the pilot spool 10 is connected with the armature 11 through the T-shaped groove, and one end of the screw sleeve 14 is sleeved with the coil 13; the first one-way valve 16 is arranged on one side of the cover plate 28 in the axial direction, one end of the first one-way valve 16 is communicated with the second damping 21 and the first control port 22, the one-way valve sleeve 20 is arranged in the valve hole, the one-way valve sleeve 20 is provided with the one-way valve core 19, the one-way valve core 19 is provided with the spring 18, one end of the one-way valve sleeve 20 is provided with the screw cap 17, and one end of the first one-way valve 16 is communicated with the pilot electromagnetic valve 15 and the first damping 6; the second one-way valve 27 is arranged on one side of the cover plate 28 in the axial direction, one end of the second one-way valve 27 is communicated with the third damping 29 and the second control port 30, the one-way valve sleeve 20 is arranged in the valve hole, the one-way valve sleeve 20 is provided with the one-way valve core 19, the one-way valve core 19 is provided with the spring 18, one end of the one-way valve sleeve 20 is provided with the screw cap 17, and one end of the second one-way valve 27 is communicated with the pilot electromagnetic valve 15 and the first damping 6;

[0022] Embodiment one:

[0023] When the pilot electromagnetic valve 15 is not powered, the pilot valve core 8 and the pilot spool 10 are in a closed state, the control oil from the first control port 22 enters the first one-way valve 16 through the second damping 21, the one-way valve core 19 is opened, the control oil enters the pilot electromagnetic valve 15, the second one-way valve 27 and the first damping 6, the control oil enters the main valve spring cavity 23, and the main valve core 2 is in a closed state due to the fact that the acting area of the spring cavity of the main valve core 2 is greater than the acting area of the second working port 26, thereby playing a role of a one-way valve;

[0024] Embodiment two:

[0025] When the pilot electromagnetic valve 15 is not powered, the pilot valve core 8 and the pilot spool 10 are in a closed state, the control oil from the second control port 30 enters the second check valve 27 through the third damping 29, the check valve core 19 is opened, the control oil enters the pilot electromagnetic valve 15, the first check valve 16 and the first damping 6, the control oil enters the main valve spring chamber 23, and since the action area of the spring chamber of the main valve core 2 is larger than that of the second working port 26, the main valve core 2 is in a closed state, and functions as a check valve;

[0026] Embodiment three:

[0027] When the pilot electromagnetic valve 15 is powered, the coil 13 generates suction, the armature 11 moves upwards, the armature 11 drives the pilot spool 10 to move upwards, at this time, the control oil from the first control port 22 or the control oil from the second control port 30 flows into the oil return port 5 from the pilot electromagnetic valve 15, at this time, the main valve spring chamber 23 has no pressure, and the main valve core 2 is in an open state;

[0028] The main valve adopts a sliding-in type structure, the valve core and the valve seat adopt a conical sealing structure, and the work is reliable and stable; the pilot valve adopts a threaded plug-in structure, the valve core and the valve seat adopt a conical sealing structure, and the problems of long use time and no leakage and the pressure maintaining effect are solved; the valve core is not easy to be stuck, and the reversing inflexibility phenomenon does not occur, the service life is long, the overall structure is simple, the work is reliable, there is no leakage, the pressure maintaining performance is good, there is no clamping phenomenon, the service life is long, and the device is widely used in high-pressure leakage-free pressure-maintaining circuits.

[0029] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0030] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical scheme of the utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the utility model embodiments.

Claims

1. A large flow bi-directional shut-off two-way cartridge valve comprising a main valve (24), a pilot solenoid valve (15), a cover plate (28), a first check valve (16) and a second check valve (27), characterized in that: The main valve (24) comprises a main valve sleeve (1), a main valve core (2), a main valve spring (3) and a cover pad (4); The pilot electromagnetic valve (15) comprises a pilot valve sleeve (7), a pilot valve core (8), a pilot reset spring (9), a pilot cone valve core (10), an armature (11), a screw sleeve (14) and a coil (13); The side surface and the bottom surface of the main valve (24) are respectively provided with a first working port (25) and a second working port (26), the main valve core (2) is arranged in the axial hole of the main valve sleeve (1), the cover pad (4) is arranged at one end of the main valve sleeve (1), the main valve spring (3) is arranged in the inner hole of the main valve core (2), the cover plate (28) is fixedly installed at the upper end of the cover pad (4), the axial inner side of the cover plate (28) is provided with the first damping (6), and the pilot electromagnetic valve (15), the first one-way valve (16), the second one-way valve (27) and the first damping (6) are sequentially installed in the axial inner side of the cover plate (28).

2. A large flow bi-directional shut-off two-way cartridge valve according to claim 1, characterized in that: The bottom surface of the cover plate (28) is provided with a first control port (22), a second control port (30) and an oil return port (5), the first damping (6) arranged in the axial direction of the cover plate (28) is communicated with a main valve spring cavity (23), the pilot electromagnetic valve (15) is arranged at one side in the axial direction of the cover plate (28), one end of the pilot electromagnetic valve (15) is communicated with the oil return port (5), the other end of the pilot electromagnetic valve (15) is communicated with the first damping (6), and the pilot valve sleeve (7) is arranged in the valve hole.

3. A large flow bi-directional seat cartridge valve according to claim 2, wherein: The pilot valve core (8) is arranged in the pilot valve sleeve (7), the pilot cone valve core (10) is arranged in the pilot valve core (8), the pilot reset spring (9) is arranged in the interior between the pilot valve core (8) and the pilot cone valve core (10), the screw sleeve (14) is installed at the upper end of the pilot valve sleeve (7), the pilot reset spring (9) is installed between the armature (11) and the screw sleeve (14), one end of the armature (11) is provided with a T-shaped groove, the pilot cone valve core (10) is connected with the armature (11) through the T-shaped groove, the axial inner side of the armature (11) is provided with a pilot spring (12), and the coil (13) is sleeved at one end of the screw sleeve (14).

4. A large flow bi-directional seat cartridge valve according to claim 3, wherein: The first one-way valve (16) and the second one-way valve (27) both comprise a screw cap (17), a one-way valve sleeve (20), a one-way valve core (19) and a spring (18); The first one-way valve (16) is arranged at one side in the axial direction of the cover plate (28), the second damping (21) is connected above the first control port (22), one end of the first one-way valve (16) is communicated with the second damping (21) and the first control port (22), the one-way valve sleeve (20) is arranged in the valve hole, the one-way valve core (19) is arranged in the one-way valve sleeve (20), the spring (18) is arranged in the one-way valve core (19), the screw sleeve (14) is arranged at one end of the one-way valve sleeve (20), and one end of the first one-way valve (16) is communicated with the pilot electromagnetic valve (15) and the first damping (6).

5. A high capacity, bidirectional shut-off, two-way cartridge valve according to claim 4, characterized in that: The second one-way valve (27) is arranged on the other axial side of the cover plate (28), one end of the second one-way valve (27) is communicated with the third damping (29) and the second control port (30), and a one-way valve sleeve (20) is also arranged in the valve hole, the screw cover (17) is arranged on the other end of the one-way valve sleeve (20), and one end of the second one-way valve (27) is communicated with the pilot electromagnetic valve (15) and the first damping (6).

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