CN103133449B - A multi-core hydraulic valve - Google Patents

Abstract

The invention relates to a multi-spool hydraulic valve and belongs to the field of hydraulic components. The multi-spool hydraulic valve comprises a valve block with a valve hole. A first spool is disposed in the valve hole of the valve block and is provided with another valve hole. A second spool is disposed in the valve hole of the first spool. The valve block, the first spool and the second spool are allowed for pairwise mutual movement. The valve block is provided with an oil access set. The first spool is provided with an oil access set matching with the oil access set on the valve block. The spools in the multi-spool hydraulic valve coordinate to move, the spools and the valve block coordinate to move, and accordingly different mechanical energy levels are generated by the hydraulic valve, different loops are made or broken and multi-loop control is achieved.

Description

A multi-core hydraulic valve

technical field

The invention belongs to the field of hydraulic components, and relates to a hydraulic valve, in particular to a hydraulic valve with multiple valve cores. Background technique

The existing hydraulic valve, its spool is basically a single core valve structure, although it can meet the application of many occasions, but the function is relatively single, can only control one circuit, if you want to control multiple circuits, you need to use multiple hydraulic valves This increases the control cost of the hydraulic circuit to a certain extent, which also limits the application and development of ordinary hydraulic valves in multi-circuit control occasions.

Existing hydraulic valve also has the design of multi-spool, as the name is called " multifunctional hydraulic valve ", and the Chinese utility model patent that the patent No. The one-way spool has a conical surface structure, and it has only one open or closed state with the main spool, and it cannot realize multi-circuit control.

The Chinese invention patent titled "Hydraulic valve, hydraulic valve group and hydraulic valve control method", patent number: 201110216709.1 discloses a hydraulic valve with two spools, including a first spool and a second spool. However, the two spools are designed in a separate way to solve the problem that the valve core and the valve body of the hydraulic valve have a long mating surface and the accuracy is difficult to guarantee. That is, the two spools are placed in series in the cavity of the valve body left and right sides. This design method is still a single spool design in essence, and cannot control multiple circuits.

Contents of the invention

Aiming at the deficiencies of the prior art, the invention provides a multi-core hydraulic valve capable of controlling multiple circuits.

A multi-core hydraulic valve, comprising a valve body (1) provided with a valve hole, a first valve core (2) is arranged in the valve hole of the valve body (1), and a valve hole is arranged in the first valve core (2) , the valve hole of the first valve core (2) is provided with a second valve core (3), and the valve body (1), the first valve core (2) and the second valve core (3) can be connected between each other Move each other, the valve body (1) is provided with a group of inlet and outlet ports, the first spool (2) is provided with a group of inlet and outlet ports matching the group of inlet and outlet ports on the valve body (1), and the second spool (3 ) is provided with a groove on the outer periphery so that the oil inlet and outlet ports on the valve body (1) and the first valve core (2) can pass through.

The oil inlet and outlet groups on the valve body (1) can be designed in different schemes according to the control needs. A feasible solution is that the oil inlet and outlet groups on the valve body (1) include oil port P, oil port A1, and oil port B1. , Oil port A2, Oil port B2, Oil port A3, Oil port B3, Oil port A4, Oil port B4, Oil port AT1, Oil port AT2, Oil port AT3, Oil port AT4, Oil port BT1, Oil port BT2, Oil port Port BT3 and oil port BT4, wherein, oil port P is set in the middle of one side of the valve body (1), oil port A1 and oil port B1, oil port A2 and oil port B2, oil port AT1 and oil port BT1 AT2 and oil port BT2 are symmetrically arranged on the same side of oil port P with oil port P as the center; on the opposite side of oil port P on the valve body (1), an oil port is set between oil port A2 and oil port AT1. Port A4, set oil ports A3 and AT4 side by side between the corresponding positions of oil port A2 and oil port AT2, and set oil port AT3 outside the corresponding position of oil port AT2; on the side opposite to oil port P on the valve body (1), use Oil port P is the center, and oil port B3, oil port B4, oil port BT3, and oil port BT4 are arranged symmetrically with the above-mentioned oil port A4, oil port A3, oil port AT4, and oil port AT3, respectively.

Preferably, on the inner wall of the valve hole of the valve body (1), on the above-mentioned oil port P, oil port A1, oil port B1, oil port A2, oil port B2, oil port A3, oil port B3, oil port A4, oil port B4 , oil port AT1, oil port AT2, oil port AT3, oil port AT4, oil port BT1, oil port BT2, oil port BT3 and oil port BT4 are set slightly wider than the above oil port width at the outlet position on the valve hole groove.

The first spool (2) is provided with a group of inlet and outlet ports matching the group of inlet and outlet ports on the valve body (1). A feasible solution is that when the first spool (2) is in the neutral position, the second The oil port group on the valve core (2) includes the oil port (24) connected with the oil port AT2 on the valve body (1), and the oil port connected with the oil port A2 on the valve body (1) (23), the oil port (22) connected with the oil port P on the valve body (1), the oil port (21) connected with the oil port B2 on the valve body (1), and the oil port (21) connected with the valve The oil port (20) through which the oil port BT2 on the body (1) passes.

According to control requirements, a groove is provided on the outer periphery of the first valve core (2) so that the oil inlet and outlet ports on the valve body (1) can pass through.

Preferably, there are two grooves provided on the outer periphery of the first valve core (2) so that the oil inlet and outlet ports on the valve body (1) can pass through, and the two grooves (27, 28) are symmetrical Set on both sides of the oil port (22) in the middle position of the first spool (2), the width of the grooves (27, 28) is greater than the width of the oil port A1, and smaller than the width between the oil port AT1 and the oil port P The minimum edge distance, the grooves (27, 28) are used to realize the penetration of the oil port on the valve body (1).

According to control requirements, a groove is provided on the outer periphery of the second valve core (3) so that the oil inlet and outlet ports on the valve body (1) and the first valve core (2) can pass through.

Preferably, when the second valve core (3) is in the neutral position, the outer periphery of the second valve core (3) is provided so that the oil inlet and outlet ports on the valve body (1) and the first valve core (2) can pass through There are two grooves, and the two grooves (25, 26) are centered on the oil port P on the valve body (1), arranged in a left-right symmetrical manner, and the width of the grooves (25, 26) is larger than that of the oil port The maximum side distance between A2 and port A1 is smaller than the minimum side distance between port AT2 and port P.

According to needs, a third valve core can also be arranged in the second valve core (3), and an oil inlet and outlet group matched with the first valve core is arranged on the second valve core (3).

According to control requirements, grooves are provided on the outer periphery of the third spool so that the oil inlet and outlet groups on the valve body (1), the first spool (2) and the second spool (3) can pass through.

In the multi-core hydraulic valve provided by the present invention, a plurality of spools are in a layer-by-layer relationship, and each layer of spools is independent of each other and can move relative to each other, and each layer of spools can be used alone or in combination relative to each other. The valve body moves. According to control requirements, the valve body is provided with oil inlet and outlet groups, and the valve cores of each layer are provided with oil ports and grooves that cooperate with the oil port groups on the valve body and between the valve cores. Compared with the prior art, the multi-core hydraulic valve provided by the present invention moves through cooperation between the valve core and the valve core, and between the valve core and the valve body, so that the hydraulic valve can produce different functional positions, communicate or cut off different Loop, to realize the control of multiple loops.

Description of drawings

FIG. 1 is a schematic structural diagram of the first functional position in Embodiment 1 of the present invention;

Fig. 2 is a schematic structural diagram of the second functional position in Embodiment 1 of the present invention;

Fig. 3 is a schematic structural diagram of the third functional position in Embodiment 1 of the present invention;

Fig. 4 is a schematic structural diagram of the fourth functional position in Embodiment 1 of the present invention;

Fig. 5 is a schematic structural diagram of the fifth functional position in Embodiment 1 of the present invention;

Fig. 6 is a schematic structural diagram of the sixth functional position in Embodiment 1 of the present invention;

Fig. 7 is a schematic structural diagram of the seventh functional position in Embodiment 1 of the present invention;

Fig. 8 is a schematic structural diagram of the eighth functional position in Embodiment 1 of the present invention;

FIG. 9 is a schematic structural diagram of the ninth functional bit in Embodiment 1 of the present invention.

Detailed ways

Example 1:

A multi-core hydraulic valve, as shown in Figure 1, includes a valve body 1 with a valve hole, a first valve core 2 is arranged in the valve hole of the valve body 1, a valve hole is arranged in the first valve core 2, and a valve hole is arranged in the first valve hole. A valve hole of the valve core 2 is provided with a second valve core 3, the valve body 1, the first valve core 2 and the second valve core 3 can move between each other, and the valve body 1 is provided with an oil inlet and outlet group , the first spool 2 is provided with an oil inlet and outlet group matching the inlet and outlet ports on the valve body 1, and the outer periphery of the second spool 3 is arranged so that the oil inlet and outlet ports on the valve body 1 and the first spool 2 can be connected groove.

The oil inlet and outlet groups on the valve body 1 can be designed in different schemes according to the control needs. A feasible solution is that, as shown in Figure 1, the oil inlet and outlet groups on the valve body 1 include oil port P, oil port A1, oil port Port B1, oil port A2, oil port B2, oil port A3, oil port B3, oil port A4, oil port B4, oil port AT1, oil port AT2, oil port AT3, oil port AT4, oil port BT1, oil port BT2 , oil port BT3 and oil port BT4, wherein, oil port P is set at the middle position on one side of valve body, oil port A1 and oil port B1, oil port A2 and oil port B2, oil port AT1 and oil port BT1 AT2 and oil port BT2 are symmetrically arranged on the same side of oil port P with oil port P as the center; on the opposite side of oil port P on valve body 1, oil port A4 is set between the corresponding positions of oil port A2 and oil port AT1 , set oil ports A3 and AT4 side by side between the corresponding positions of oil port A2 and oil port AT2, and set oil port AT3 outside the corresponding position of oil port AT2; on the side opposite to oil port P on valve body 1, take oil port P as the In the center, oil port B3, oil port B4, oil port BT3, and oil port BT4 are provided in a bilaterally symmetrical manner with the above-mentioned oil port A4, oil port A3, oil port AT4, and oil port AT3, respectively.

As shown in Figure 1, on the inner wall of the valve hole of the valve body 1, on the above-mentioned oil port P, oil port A1, oil port B1, oil port A2, oil port B2, oil port A3, oil port B3, oil port A4, oil port B4, oil port AT1, oil port AT2, oil port AT3, oil port AT4, oil port BT1, oil port BT2, oil port BT3 and oil port BT4 are arranged at the outlet position on the valve hole in the circumferential direction slightly wider than the above oil ports Wide grooves, for example, on the inner wall of the valve hole of the valve body 1, a groove 11 slightly wider than the width of the valve hole is provided circumferentially at the outlet of the inner wall of the valve hole of the oil port BT4. The function of the groove on the inner wall of the valve hole is to increase the flow rate and facilitate processing.

As shown in Figure 1, the first spool 2 is provided with a group of inlet and outlet ports matching the group of inlet and outlet ports on the valve body 1. A feasible solution is that when the first spool 2 is in the neutral position, the first The oil port group on the valve core 2 includes the oil port 24 connected with the oil port AT2 on the valve body 1, the oil port 23 connected with the oil port A2 on the valve body 1, and the oil port 23 connected with the valve body 1 The oil port 22 connected with the oil port P on the valve body 1 , the oil port 21 connected with the oil port B2 on the valve body 1 , and the oil port 20 connected with the oil port BT2 on the valve body 1 .

As shown in Figure 1, according to the control requirements, two grooves are symmetrically arranged on both sides of the oil port 22 of the first spool 2: the groove 27 and the groove 28, and the width of the grooves 27 and 28 is greater than the width of the oil port A1. Smaller than the minimum margin between the oil port AT1 and the oil port P, the grooves 27 and 28 are used to realize the penetration of the oil port on the valve body 1 .

As shown in Figure 1, when the second spool 3 is in the neutral position, the second spool 3 is centered on the oil port P on the valve body 1, and two grooves 25, 26 are arranged in a left-right symmetrical manner. The width of the grooves 25 and 26 is greater than the maximum distance between the oil port A2 and the oil port A1, and smaller than the minimum distance between the oil port AT2 and the oil port P.

Example 2:

Same as the embodiment 1, the difference from the embodiment 1 is that the valve body 1, the first spool 2, the designs of the oil inlet and outlet groups and the grooves on the second spool 3 are different.

Example 3:

It is the same as Embodiment 1 and Embodiment 2, except that the second valve core 3 is provided with a third valve core, and the second valve core 3 is provided with a group of oil inlet and outlet ports matching the first valve core. According to control requirements, grooves are provided on the outer periphery of the third valve core so that the oil inlet and outlet groups on the valve body 1 , the first valve core 2 and the second valve core 3 can pass through.

Introduce each function position of above-mentioned embodiment 1 below in conjunction with accompanying drawing 1-9, and each function is shown in Table 1:

Spool 1 Spool 2 A1 B1 A2 B2 A3 B3 A4 B4 Function 1 Median Median close close close close close close close close Function 2 Median left close close back out close close close close Function 3 Median right bit close close out back close close close close Function 4 left Median back out close close close close close close Function 5 left left back out close close back out close close Function 6 left right bit back out close close out back close close Function 7 right bit Median out back close close close close close close Function 8 right bit right bit out back close close close close out back Function 9 right bit left out back close close close close back out

As shown in FIG. 1 , when both the first valve core 2 and the second valve core 3 are in the neutral position, the oil inlet P is in a closed state.

As shown in Figure 2, when the first spool 2 is in the middle position and the second spool 3 is in the left position, the oil inlet P is connected to the oil port B2, the oil port B2 is the oil outlet, and the oil port A2 is connected to the oil port AT2. China Unicom, oil port A2 return oil.

As shown in Figure 3, when the first spool 2 is in the middle position and the second spool 3 is in the right position, the oil inlet P is connected to the oil port A2, the oil port A2 is discharged, and the oil port B2 is connected to the oil port BT2 , Oil port B2 returns oil.

As shown in Figure 4, when the first spool 2 is in the left position and the second spool 3 is in the middle position, the oil inlet P communicates with the oil port B1, the oil port B1 outputs oil, and the oil port A1 communicates with the oil port AT1 , Oil port A1 returns oil.

As shown in Figure 5, when the first spool 2 and the second spool 3 are in the left position, the oil inlet P communicates with the oil port B1, the oil port B1 outputs oil, and the oil port A1 returns oil; at the same time, the oil inlet Port P is connected to oil port B3, oil is delivered from oil port B3, oil port A3 is connected to oil port AT3, and oil port A3 returns oil.

As shown in Figure 6, when the first spool 2 is in the left position and the second spool 3 is in the right position, the oil inlet P communicates with the oil port B1, the oil port B1 outputs oil, and the oil port A1 returns oil; at the same time, The oil inlet P is connected with the oil port A3, the oil outlet of the oil port A3, the oil port B3 is connected with the oil port BT3, and the oil port B3 returns the oil.

As shown in Figure 7, when the first spool 2 is in the right position and the second spool 3 is in the middle position, the oil inlet P is connected to the oil port A1, the oil port A1 is the oil outlet, and the oil port B1 is connected to the oil port BT1. China Unicom, oil port BB1 returns oil.

As shown in Figure 8, when the first spool 2 and the second inner spool 3 are in the right position, the oil inlet P is connected with the oil port A1, the oil is discharged from the oil port A1, and the oil is returned from the oil port B1; Oil port P communicates with oil port A4, oil port A4 delivers oil, oil port B4 communicates with oil port BT4, and oil port BB4 returns oil.

As shown in Figure 9, when the first spool 2 is in the right position and the second spool 3 is in the left position, the oil inlet P is connected to the oil port A1, the oil port B1 is connected to the oil port BT1, and the oil port A1 is connected to the oil outlet. , oil port B1 returns oil; at the same time, oil inlet P communicates with oil port B4, oil port B4 outputs oil, oil port A4 communicates with oil port AT4, and oil port A4 returns oil.

Beneficial effects of the present invention:

1. The structure of this kind of multi-core valve can make it through the left and right movement of the multi-layer valve core to obtain more functional positions through different combinations, so as to control more states, and then use one hydraulic valve to control multiple valves. purpose of the circuit.

2. This kind of multi-core valve can control more hydraulic circuits with fewer valve cores, which improves the compactness of the hydraulic valve.

3. The realization of one function of this kind of multi-core valve sometimes needs to be based on another function, which makes the valve have a certain logical relationship in structure, and is especially suitable for sequence control.

With the development of hydraulic technology, improving the control ability of hydraulic valves will be a major development trend. The multi-core hydraulic valve provided by the invention is a good way to solve this problem, and can control more hydraulic circuits while ensuring a compact structure.

Claims (1)

1. a multicore hydrovalve, comprise the valve body (1) that is provided with valve opening, in the valve opening of valve body (1), be provided with the first spool (2), the first spool is provided with valve opening in (2), it is characterized in that, in the valve opening of the first spool (2), be provided with the second spool (3), described valve body (1), the first spool (2) and the second spool (3) can move between any two mutually, valve body arranges oil inlet and outlet group on (1), the oil inlet and outlet group that oil inlet and outlet group on the upper setting of the first spool (2) and valve body (1) matches, the groove that the second spool (3) periphery setting can connect the oil inlet and outlet on valve body (1) and the first spool (2), oil inlet and outlet group on described valve body (1) comprises hydraulic fluid port P, hydraulic fluid port A1, hydraulic fluid port B1, hydraulic fluid port A2, hydraulic fluid port B2, hydraulic fluid port A3, hydraulic fluid port B3, hydraulic fluid port A4, hydraulic fluid port B4, hydraulic fluid port AT1, hydraulic fluid port AT2, hydraulic fluid port AT3, hydraulic fluid port AT4, hydraulic fluid port BT1, hydraulic fluid port BT2, hydraulic fluid port BT3 and hydraulic fluid port BT4, wherein, hydraulic fluid port P is arranged on the neutral position of valve body (1) one side, and hydraulic fluid port A1 and hydraulic fluid port B1, hydraulic fluid port A2 and hydraulic fluid port B2, hydraulic fluid port AT1 and hydraulic fluid port BT1, hydraulic fluid port AT2 and hydraulic fluid port BT2 are symmetrical set centered by hydraulic fluid port P at the homonymy of hydraulic fluid port P, opposite one side of the upper hydraulic fluid port P of valve body (1) arranges hydraulic fluid port A4 between hydraulic fluid port A2 and hydraulic fluid port AT1 corresponding position, is arranged side by side hydraulic fluid port A3 and hydraulic fluid port AT4, at hydraulic fluid port AT2 corresponding position arranged outside hydraulic fluid port AT3 between hydraulic fluid port A2 and hydraulic fluid port AT2 corresponding position, opposite one side of the upper hydraulic fluid port P of valve body (1), centered by hydraulic fluid port P, arranges hydraulic fluid port B3, hydraulic fluid port B4, hydraulic fluid port BT3 and hydraulic fluid port BT4 in symmetrical mode respectively with above-mentioned hydraulic fluid port A4, hydraulic fluid port A3, hydraulic fluid port AT4 and hydraulic fluid port AT3.

2 .multicore hydrovalve according to claim 1, it is characterized in that, on the valve opening inwall of valve body (1), at described hydraulic fluid port P, hydraulic fluid port A1, hydraulic fluid port B1, hydraulic fluid port A2, hydraulic fluid port B2, hydraulic fluid port A3, hydraulic fluid port B3, hydraulic fluid port A4, hydraulic fluid port B4, hydraulic fluid port AT1, hydraulic fluid port AT2, hydraulic fluid port AT3, hydraulic fluid port AT4, hydraulic fluid port BT1, hydraulic fluid port BT2, hydraulic fluid port BT3 and hydraulic fluid port BT4, place, the exit position on valve opening circumferentially arranges than the slightly wide groove of above-mentioned hydraulic fluid port width.

3 .according to the multicore hydrovalve described in claim 1 or 2, it is characterized in that, the oil inlet and outlet group that oil inlet and outlet group on the upper setting of the first spool (2) and valve body (1) matches, at the first spool (2) during in meta, hydraulic fluid port group on the first spool (2) comprise with described valve body (1) on the hydraulic fluid port (24) that connects of hydraulic fluid port AT2, the hydraulic fluid port (23) connecting with hydraulic fluid port A2 on described valve body (1), the hydraulic fluid port (22) connecting with hydraulic fluid port P on described valve body (1), the hydraulic fluid port (21) connecting with hydraulic fluid port B2 on described valve body (1) and the hydraulic fluid port (20) connecting with hydraulic fluid port BT2 on described valve body (1).

4 .multicore hydrovalve according to claim 3, is characterized in that, the groove that the first spool (2) periphery setting can connect the oil inlet and outlet on valve body (1).

5 .multicore hydrovalve according to claim 4, it is characterized in that, the groove that oil inlet and outlet on valve body (1) can be connected of described the first spool (2) periphery setting has two, described two grooves (27,28) are arranged on hydraulic fluid port (22) both sides in described the first spool (2) neutral position in symmetrical mode, the width of described two grooves (27,28) is greater than the width of hydraulic fluid port A1, be less than the minimum edge distance between hydraulic fluid port AT1 and hydraulic fluid port P, described two grooves (27,28) are used for realizing the perforation of the upper hydraulic fluid port of valve body (1).

6 .multicore hydrovalve according to claim 5, it is characterized in that, at the second spool (3) during in meta, the groove that oil inlet and outlet on valve body (1) and the first spool (2) can be connected of described the second spool (3) periphery setting has two, the width of described two grooves (25,26) is greater than the maximum back gauge between hydraulic fluid port A2 and hydraulic fluid port A1, is less than the minimum edge distance between hydraulic fluid port AT2 and hydraulic fluid port P.

7 .multicore hydrovalve according to claim 1, it is characterized in that, the 3rd spool is set in the second spool (3), the upper oil inlet and outlet group matching with the first spool, the groove that the 3rd spool periphery setting can connect the oil inlet and outlet group on valve body (1), the first spool (2) and the second spool (3) of arranging of the second spool (3).

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