Double-valve-element hydraulic control valve

Abstract

The double-valve-element hydraulic control valve comprises a valve body, and a first oil channel and a second oil channel which penetrate through the two opposite sides and are arranged in parallel at intervals are arranged on the valve body. One end of the first oil duct is an oil inlet, and the other end is a working inlet; one end, on the same side with the oil inlet, of the second oil duct is an oil return port, and the other end is a working outlet; the valve body is further provided with a first valve cavity and a second valve cavity which extend reversely, are arranged in a staggered mode and are independent of each other. The first valve cavity communicates with the first oil way and is used for installing the first valve element. The second valve cavity communicates with the second oil channel and is used for installing the second valve element. The first valve element and the second valve element are independent from each other, and the valve rods for driving the first valve element and the second valve element are also independent from each other, so that the moving resistance of the valve rods is reduced, and the phenomena that the valve elements are jammed and cannot move are avoided; by controlling the positions of the first valve element and the second valve element, the flow and the pressure in the first oil channel and the second oil channel can be adjusted, and the pressure and the flow of oil in the valve body are kept stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to control valve technical field, concretely is a kind of double valve core hydraulic control valve. BACKGROUND

[0002] The working principle of hydraulic directional control valve is: flow passage replacement is realized by valve core movement, thereby controlling the flow direction of oil.

[0003] The valve core of conventional control valve is installed on the same valve rod, and the valve core is moved by the movement of valve rod, thereby changing flow passage.The above structure has the following defects: 1, the valve core is connected with valve body through sealing ring, so the resistance of valve rod is relatively large, and the phenomenon of valve core jamming and unable to move is easily generated;2, oil inlet flow, oil inlet pressure, oil outlet flow and oil outlet pressure are difficult to adjust.

[0004] Therefore, how to overcome the above defects has become a problem to be solved by the technical personnel in the field. SUMMARY

[0005] To solve the technical problems in the background art, the utility model discloses a kind of double valve core hydraulic control valve.

[0006] The utility model provides a kind of double valve core hydraulic control valve, including valve body, first oil channel and second oil channel are arranged on the valve body and are penetrated through opposite sides, interval, parallel;

[0007] One end of first oil channel is oil inlet, and the other end is working inlet;

[0008] The end of second oil channel on the same side with oil inlet is oil return, and the other end is working outlet;

[0009] Valve body is also provided with first valve cavity and second valve cavity, which are reversely extended, staggered arrangement and independent of each other;

[0010] First valve cavity is communicated with first oil channel, and is used for installing first valve core;

[0011] Second valve cavity is communicated with second oil channel, and is used for installing second valve core.

[0012] The beneficial effects of the above setting are: 1, first valve core and second valve core are independent of each other, and the valve rod driving first valve core and second valve core is also independent of each other, so as to reduce the moving resistance of valve rod, and the phenomenon of valve core jamming and unable to move is not easy to appear;2, since first valve core and second valve core are independent of each other, the position of first valve core and second valve core can be controlled, the flow and pressure in first oil channel and second oil channel can be adjusted, so that the oil pressure and flow in valve body remain stable.

[0013] Since the oil pressure in the first oil passage and the second oil passage is prone to be too high, based on this, the further improvement is that the valve body is further provided with a first pressure relief hole and a second pressure relief hole; the first pressure relief hole is arranged on the same side of the first valve cavity, parallel and spaced, the inner end of the first pressure relief hole is communicated with the first oil passage, and the outer end of the first pressure relief hole penetrates the side wall of the valve body; the second pressure relief hole is arranged on the same side of the second valve cavity, parallel and spaced, the inner end of the second pressure relief hole is communicated with the second oil passage, and the outer end of the second pressure relief hole penetrates the side wall of the valve body.

[0014] Since the oil pressure in the first valve cavity and the second valve cavity is prone to be too high, based on this, the further improvement is that a first pressure relief oil passage is connected between the first pressure relief hole and the first valve cavity; a second pressure relief oil passage is connected between the second pressure relief hole and the second valve cavity.

[0015] The structure of the first pressure relief oil passage directly affects the impact force of the oil in the valve cavity on the hole wall of the pressure relief hole, based on this, the further improvement is that the first pressure relief oil passage and the axis of the first pressure relief hole form an acute angle, and the second pressure relief oil passage and the axis of the second pressure relief hole form an acute angle. In this way, the oil in the valve cavity will not impact the hole wall of the pressure relief hole directly, so that the structure and performance of the hole wall of the pressure relief hole remain stable.

[0016] Since the heat in the valve body is difficult to dissipate, based on this, the further improvement is that the valve body is further provided with heat dissipation holes penetrating the two sides of the valve body.

[0017] The length of the heat dissipation hole directly affects the heat dissipation area and the heat dissipation effect, based on this, the further improvement is that the heat dissipation hole is arranged obliquely.

[0018] The distance between the heat dissipation hole and the valve cavity, the pressure relief hole and the oil passage directly affects the heat dissipation performance, based on this, the further improvement is that the heat dissipation hole is in a symmetrical V shape; specifically, the heat dissipation hole is provided with a first heat dissipation hole, a second heat dissipation hole and a third heat dissipation hole; the first heat dissipation hole and the second heat dissipation hole are located on one side of the first oil passage in a radial direction and are arranged symmetrically; the distance between the first heat dissipation hole and the second heat dissipation hole is greater than the distance between the first oil passage and the second oil passage, and the distance between the first heat dissipation hole and the first oil passage is equal to the distance between the second heat dissipation hole and the second oil passage; the third heat dissipation hole is located on the other side of the first oil passage and the second oil passage, and the position of the third heat dissipation hole forms an isosceles triangle with the first oil passage and the second oil passage; the opening direction of the first heat dissipation hole and the second heat dissipation hole is towards the first valve cavity and the first pressure relief oil passage; the opening direction of the third heat dissipation hole is towards the middle position of the first oil passage and the second oil passage.

[0019] Since the sealing ring at the oil inlet and the oil return port is prone to deformation and dislocation, leading to sealing failure, based on this, the further improvement is that the oil inlet and the oil return port are provided with recessed recesses; the bottom and the wall of the recess form an acute angle, and the connection between the bottom and the wall is circularly transitioned for clamping the sealing ring.

[0020] The utility model discloses the beneficial effect is: 1, first valve core and second valve core are independent of each other, and the valve rod of drive first valve core and second valve core is also independent of each other, therefore reduces the moving resistance of valve rod, and first valve core and second valve core are independent of each other, and therefore through the position of control first valve core and second valve core, can adjust the flow and pressure in first oil channel and second oil channel, make the oil pressure, flow in valve body keep stable. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model is further explained in connection with the drawings and examples.

[0022] Figure 1 It is the structure schematic diagram of the utility model;

[0023] Figure 2 It is the structure schematic diagram of another view of the utility model;

[0024] Figure 3 It is the front view of the utility model;

[0025] Figure 4 It is Figure 3 the sectional view of A-A in;

[0026] Figure 5 It is Figure 4 the enlarged view of E in;

[0027] Figure 6 It is Figure 3 the sectional view of B-B in;

[0028] Figure 7 It is Figure 4 the sectional view of C-C in;

[0029] Figure 8 It is Figure 3 the sectional view of D-D in;

[0030] In the drawing: 1, valve body;2, first oil channel;3, second oil channel;4, oil inlet;5, work inlet;6, oil return port;7, work outlet;8, first valve cavity;9, second valve cavity;10, first pressure relief hole;11, second pressure relief hole;12, first pressure relief oil channel;13, second pressure relief oil channel;14, first heat dissipation hole;15, second heat dissipation hole;16, third heat dissipation hole;17, recessed platform. DETAILED DESCRIPTION

[0031] Now in connection with the drawings, the utility model is further explained in detail.These drawings are all simplified schematic diagram, just with the schematic way of explanation the basic structure of the utility model, therefore it just shows the constitution related with the utility model.

[0032] As Figures 1-4As shown, the utility model discloses a double valve core hydraulic control valve, including the cuboid valve body 1, and the valve body 1 is provided with the first oil channel 2 and the second oil channel 3 of the first oil channel 2 of interval, parallel on both sides, and the first oil channel 2 is the oil inlet 4 in one end, and the other end is the working inlet 5, and the second oil channel 3 is the oil inlet 4 with one end of the same side as the oil return 6, and the other end is the working outlet 7.

[0033] Valve body 1 still be provided with the first valve cavity 8 and the second valve cavity 9 of reverse extension, staggered arrangement, independent of each other, and the first valve cavity 8 is perpendicular with the first oil channel 2 and is communicated, is used to install the first valve core, and the first valve cavity 8's inner end extends to the second oil channel 3, and the second valve cavity 9 is perpendicular with the second oil channel 3 and is communicated, is used to install the second valve core, and the second valve cavity 9's inner end extends to the first oil channel 2.

[0034] The above structure, under the opening and closing of the first valve core and the second valve core, constitutes two oil channels, and the first kind of oil channel passes through the oil inlet 4, the working inlet 5, the working outlet 7 and the oil return 6 in turn, and the second kind of oil channel passes through the oil inlet 4, the working outlet 7, the working inlet 5 and the oil return 6 in turn, to realize the control valve reversing.

[0035] Valve body 1 still be provided with the first pressure relief hole 10 and the second pressure relief hole 11, and the first pressure relief hole 10 is arranged with the first valve cavity 8 on the same side, parallel, interval, and its inner end is communicated with the first oil channel 2, and the outer end penetrates the lateral wall of valve body 1, and the second pressure relief hole 11 is arranged with the second valve cavity 9 on the same side, parallel, interval, and its inner end is communicated with the second oil channel 3, and the outer end penetrates the lateral wall of valve body 1, when the oil pressure in the first oil channel 2 and the second oil channel 3 is too high, can relieve pressure through the first pressure relief hole 10 and the second pressure relief hole 11.

[0036] The first pressure relief hole 10 and the first valve cavity 8 are connected with the first pressure relief oil channel 12, and the second pressure relief hole 11 and the second valve cavity 9 are connected with the second pressure relief oil channel 13, when the oil pressure in the first valve cavity 8 and the second valve cavity 9 is too high, can relieve pressure through the first pressure relief hole 10 and the second pressure relief hole 11, wherein the first pressure relief oil channel 12 and the axis of the first pressure relief hole 10 form an acute angle, and the second pressure relief oil channel 13 and the axis of the second pressure relief hole 11 form an acute angle, so setting, the oil in the valve cavity will not be directly opposite the impact of the hole wall of the hydraulic hole, so that the structure and performance of the hole wall of the pressure relief hole remain stable.

[0037] Valve body 1 still be provided with the heat dissipation hole of penetrating both sides of valve body 1, and the heat dissipation hole is not communicated with the oil channel. Figure 8 As shown, the heat dissipation hole is arranged obliquely and forms a symmetrical V-shaped structure, which prolongs the length of the heat dissipation hole, increases the heat dissipation area and improves the heat dissipation effect.

[0038] The heat dissipation holes are three, which are respectively a first heat dissipation hole 14, a second heat dissipation hole 15 and a third heat dissipation hole 16; the first heat dissipation hole 14 and the second heat dissipation hole 15 are located on one side of the first oil channel 2 in the radial direction, and are symmetrically arranged; the interval between the first heat dissipation hole 14 and the second heat dissipation hole 15 is greater than the interval between the first oil channel 2 and the second oil channel 3, the interval between the first heat dissipation hole 14 and the first oil channel 2 is equal to the interval between the second heat dissipation hole 15 and the second oil channel 3; the third heat dissipation hole 16 is located on the other side of the first oil channel 2 and the second oil channel 3, and the position of the third heat dissipation hole 16 forms an isosceles triangle with the first oil channel 2 and the second oil channel 3; the opening direction of the first heat dissipation hole 14 and the second heat dissipation hole 15 is towards the first valve cavity 8 and the first pressure relief oil channel 12; the opening direction of the third heat dissipation hole 16 is towards the middle position of the first oil channel 2 and the second oil channel 3. In this way, the first heat dissipation hole 14 is close to the first valve cavity 8 and the first pressure relief hole 10, the second heat dissipation hole 15 is close to the second valve cavity 9 and the second pressure relief hole 11, and the third heat dissipation hole 16 is close to the first oil channel 2 and the second oil channel 3, so that the heat dissipation speed is improved, and the heat dissipation effect is improved.

[0039] As shown in Figure 5 The bottom and the wall of the recessed platform 17 form an acute angle, and the connection between the bottom and the wall is circularly arc-shaped, which is used for clamping a sealing ring. In this way, the position of the sealing ring is more stable, and the dislocation phenomenon does not occur.

[0040] Compared with the prior art, the beneficial effects of the embodiment are: 1. The first valve core and the second valve core are independent of each other, and the valve stems for driving the first valve core and the second valve core are also independent of each other, so that the moving resistance of the valve stem is reduced, and the valve core is not prone to jamming and movement; 2. Since the first valve core and the second valve core are independent of each other, by controlling the positions of the first valve core and the second valve core, the flow and pressure in the first oil channel 2 and the second oil channel 3 can be adjusted, so that the oil pressure and flow in the valve body 1 remain stable.

[0041] Based on the above ideal embodiments of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. A dual spool hydraulic control valve comprising a valve body (1), characterized in that: The valve body (1) is provided with first oil channel (2) and second oil channel (3) which are spaced and parallel on opposite sides; One end of the first oil channel (2) is oil inlet (4), the other end is working inlet (5); The end of the second oil channel (3) on the same side of the oil inlet (4) is oil return port (6), the other end is working outlet (7); The valve body (1) is also provided with first valve cavity (8) and second valve cavity (9) which are reversely extended, staggered and independent of each other; The first valve cavity (8) is communicated with the first oil channel (2) for installing the first valve core; The second valve cavity (9) is communicated with the second oil channel (3) for installing the second valve core.

2. The dual spool hydraulic control valve of claim 1, wherein: The valve body (1) is also provided with first pressure relief hole (10) and second pressure relief hole (11); The first pressure relief hole (10) is arranged on the same side of the first valve cavity (8), parallel and spaced, the inner end is communicated with the first oil channel (2), and the outer end penetrates the side wall of the valve body (1); The second pressure relief hole (11) is arranged on the same side of the second valve cavity (9), parallel and spaced, the inner end is communicated with the second oil channel (3), and the outer end penetrates the side wall of the valve body (1).

3. The dual spool hydraulic control valve of claim 2, wherein: The first pressure relief hole (10) and the first valve cavity (8) are connected by the first pressure relief oil channel (12); The second pressure relief hole (11) and the second valve cavity (9) are connected by the second pressure relief oil channel (13).

4. The dual spool hydraulic control valve of claim 3, wherein: The first pressure relief oil channel (12) and the axis of the first pressure relief hole (10) form an acute angle, and the second pressure relief oil channel (13) and the axis of the second pressure relief hole (11) form an acute angle.

5. The dual spool hydraulic control valve of claim 1, wherein: The valve body (1) is also provided with heat dissipation holes penetrating the two sides of the valve body (1).

6. The dual spool hydraulic control valve of claim 5, wherein: The heat dissipation holes are arranged obliquely.

7. The dual spool hydraulic control valve of claim 6, wherein: The heat dissipation holes are V-shaped in symmetrical structure.

8. The dual spool hydraulic control valve of claim 7, wherein: The heat dissipation holes are respectively first heat dissipation hole (14), second heat dissipation hole (15) and third heat dissipation hole (16); The first heat dissipation hole (14) and the second heat dissipation hole (15) are located on one side of the first oil channel (2) in radial direction and are symmetrically arranged; the distance between the first heat dissipation hole (14) and the second heat dissipation hole (15) is greater than the distance between the first oil channel (2) and the second oil channel (3), and the distance between the first heat dissipation hole (14) and the first oil channel (2) is equal to the distance between the second heat dissipation hole (15) and the second oil channel (3); The third heat dissipation hole (16) is located on the other side of the first oil channel (2) and the second oil channel (3), and the position forms an isosceles triangle with the first oil channel (2) and the second oil channel (3).

9. The dual spool hydraulic control valve of claim 8, wherein: The opening direction of the first heat dissipation hole (14) and the second heat dissipation hole (15) is towards the first valve cavity (8) and the first pressure relief oil channel (12); The opening direction of the third heat dissipation hole (16) is towards the middle position of the first oil channel (2) and the second oil channel (3).

10. The dual spool hydraulic control valve of claim 1, wherein: The oil inlet (4) and the oil return port (6) are provided with recessed recesses (17); The bottom of the recess (17) and the wall form an acute angle, and the connection between the bottom and the wall is circularly transitioned for clamping the sealing ring.

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