CN212272677U - Hydraulic control valve block, hydraulic control system and hydraulic equipment - Google Patents

Abstract

The utility model relates to a hydraulic control valve block, a hydraulic control system and hydraulic equipment, wherein the hydraulic control valve block comprises a control loop and a brake loop, and the control loop is connected between a hydraulic source and a hydraulic cylinder; a first main oil inlet of a first electromagnetic directional valve in a brake circuit is connected with a first oil pipeline of a control circuit, a first main oil return port of the first electromagnetic directional valve is connected with a hydraulic source, a first working oil port of the first electromagnetic directional valve is connected with a first flow outlet of a synchronous motor, a second working oil port of the first electromagnetic directional valve is respectively connected with a first pilot port of the first hydraulic control one-way valve and a first flow inlet of the synchronous motor, a second flow inlet of the synchronous motor is connected with a first oil inlet of the first hydraulic control one-way valve, a first oil outlet of the first hydraulic control one-way valve is connected with a hydraulic cylinder, and a second flow outlet of the synchronous motor is connected with the hydraulic source. The utility model provides a braking equipment fragile, the untimely technical problem of braking.

Description

Hydraulic control valve block, hydraulic control system and hydraulic equipment

Technical Field

The utility model relates to a metallurgical technology field, it is further, relate to a hydraulic control valve piece, hydraulic control system and hydraulic equipment, especially relate to a be applied to hydraulic control valve piece, hydraulic control system and hydraulic equipment on equipment such as cold bed and walking vehicle.

Background

At present, mechanical equipment is braked in a passive control mode mostly, motor driving equipment is braked in a frequency conversion and brake control mode mostly, and hydraulic driving equipment is braked in a cylinder buffer mode, an external balance valve mode, an energy accumulator mode and the like mostly. The common characteristic of the braking modes of the various devices is that mechanical kinetic energy is converted into heat energy, elastic potential energy or pressure energy, so that the purpose of braking is achieved, but the kinetic energy or the pressure energy generated by some devices at the moment of braking is too large to exceed the mechanical limit strength of the buffer device (element) so as to cause the damage of the devices, or the fatigue damage of the devices caused by limited braking operations can cause the situations of brake failure or brake untimely, and in addition, noise pollution can be generated in the process of braking the devices, so that the physical health of workers is influenced. The above-mentioned situations all cause economic loss and decrease of working efficiency, and are not favorable for development of enterprises and expansion of production scale.

Aiming at the problems of easy damage and untimely braking of braking equipment in the prior art, an effective solution is not provided.

Therefore, the inventor provides a hydraulic control valve block, a hydraulic control system and hydraulic equipment by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hydraulic control valve piece, hydraulic control system and hydraulic equipment, cooperate through control circuit and braking circuit, the realization can be accurate with pneumatic cylinder driven equipment, it is steady, no quick braking is realized under the operating mode of impact, realize the normal start of pneumatic cylinder through control circuit, the operation such as switching-over and fast slow speed adjustment, when needs carry out the stop operation to the pneumatic cylinder, automatic switch is to braking circuit, guarantee can realize the braking to the pneumatic cylinder in predetermined time and stroke range, in order to satisfy the demand of production and development.

The purpose of the utility model can be realized by adopting the following technical scheme:

the utility model provides a hydraulic control valve block, hydraulic control valve block is including control hydraulic cylinder work's control circuit and control the brake circuit of pneumatic cylinder braking, wherein:

two ends of a first oil pipeline of the control loop are respectively communicated with a hydraulic oil inlet of a hydraulic source and a rodless cavity of a hydraulic cylinder, and two ends of a second oil pipeline of the control loop are respectively communicated with a hydraulic oil return port of the hydraulic source and a rod cavity of the hydraulic cylinder;

the brake circuit comprises a first electromagnetic directional valve, a synchronous motor and a first hydraulic control one-way valve, a first main oil inlet of the first electromagnetic directional valve is connected with a first oil pipeline of the control circuit, the first main oil return port of the first electromagnetic directional valve is used for being communicated with the hydraulic oil return port of the hydraulic source, a first working oil port of the first electromagnetic directional valve is connected with a first outflow port of the synchronous motor, the second working oil port of the first electromagnetic directional valve is respectively connected with the first pilot port of the first hydraulic control one-way valve and the first inflow port of the synchronous motor, a second inflow opening of the synchronous motor is connected with a first oil inlet of the first hydraulic control one-way valve, the first oil outlet of the first hydraulic control one-way valve is communicated with a rodless cavity of the hydraulic cylinder, and a second outlet of the synchronous motor is communicated with a hydraulic oil return port of the hydraulic source.

The utility model discloses an in a preferred embodiment, synchronous motor be used for with be provided with the check valve between the hydraulic pressure source, the inlet of check valve be used for with the hydraulic pressure oil return opening of hydraulic pressure source is linked together, the liquid outlet of check valve with synchronous motor's second inlet is linked together.

In a preferred embodiment of the present invention, the control circuit includes a second electromagnetic directional valve, a third electromagnetic directional valve, a logic valve and a second hydraulic one-way valve, wherein:

a second main oil inlet of the second electromagnetic directional valve is used for being communicated with a hydraulic oil inlet of the hydraulic source, a second main oil return port of the second electromagnetic directional valve is used for being communicated with a hydraulic oil return port of the hydraulic source, a third working oil port of the second electromagnetic directional valve is respectively connected with the first main oil inlet of the first electromagnetic directional valve, a second pilot port of the second hydraulic control one-way valve and a third main oil inlet of the third electromagnetic directional valve, a third main oil return port of the third electromagnetic directional valve is used for being communicated with the hydraulic oil return port of the hydraulic source, a fourth working oil port of the third electromagnetic directional valve is connected with a first interface of the logic valve, a second interface of the logic valve is communicated with a rodless cavity of the hydraulic cylinder, and a fifth working oil port of the third electromagnetic directional valve is connected with a second oil inlet of the second hydraulic control one-way valve, and a second oil outlet of the second hydraulic control one-way valve is communicated with a rod cavity of the hydraulic cylinder.

In a preferred embodiment of the present invention, the third control port of the logic valve is connected to the second working oil port of the first electromagnetic directional valve.

In a preferred embodiment of the present invention, the control circuit controls the hydraulic cylinder to be in a working state, the second main oil inlet of the second electromagnetic directional valve is communicated with the third working oil port, and a first high-pressure medium sequentially passes through the third working oil port and the second pilot port to enter the second hydraulic check valve, so that the second hydraulic check valve is in a non-return failure state; the third main oil inlet of the third electromagnetic directional valve is communicated with the fourth working oil port, the third main oil return port of the third electromagnetic directional valve is communicated with the fifth working oil port, the first high-pressure medium sequentially passes through the third working oil port, the third main oil inlet, the fourth working oil port and the first interface and enters the logic valve, and the first high-pressure medium enters the rodless cavity of the hydraulic cylinder through the second interface of the logic valve so as to push the piston in the hydraulic cylinder to move towards the direction of the rod cavity;

and a second high-pressure medium in the rod cavity sequentially flows back to the hydraulic source through the second oil outlet and the second oil inlet of the second hydraulic control one-way valve, the fifth working oil port and the third main oil return port of the third electromagnetic directional valve and the hydraulic oil return port of the hydraulic source.

In a preferred embodiment of the present invention, the brake circuit controls the hydraulic cylinder to be in a braking state, the third main oil inlet of the third electromagnetic directional valve is disconnected from the fourth working oil port, the first interface of the logic valve is disconnected from the second interface, the first main oil inlet of the first electromagnetic directional valve is communicated with the second working oil port, the first main oil return port of the first electromagnetic directional valve is communicated with the first working oil port, and a part of the first high-pressure medium in the second electromagnetic directional valve enters the first hydraulic control one-way valve through the first pilot port of the first hydraulic control one-way valve, so that the first hydraulic control one-way valve fails; the other part of the first high-pressure medium in the second electromagnetic directional valve sequentially enters the synchronous motor through the third working oil port of the second electromagnetic directional valve, the first main oil inlet and the second working oil port of the first electromagnetic directional valve and the first inflow port of the synchronous motor to drive the synchronous motor to rotate, the pressure at the second outflow port of the synchronous motor is reduced, and the first high-pressure medium in the rodless cavity flows back to the hydraulic source through the second inflow port and the second outflow port of the synchronous motor and the hydraulic oil return port of the hydraulic source.

In a preferred embodiment of the present invention, the first electromagnetic directional valve and the second electromagnetic directional valve are two-position four-way solenoid valves, and the third electromagnetic directional valve is a three-position four-way solenoid valve.

The utility model provides a hydraulic control system, hydraulic control system includes hydraulic pressure source, electrical control box, pneumatic cylinder and foretell hydraulic control valve block, wherein:

the hydraulic source is respectively connected with the rodless cavity of the hydraulic cylinder and the rod cavity of the hydraulic cylinder through the control loop, and the hydraulic source is connected with the rodless cavity of the hydraulic cylinder through the brake loop;

and a controller is arranged in the electric control box, and a control signal output end of the controller is electrically connected with a control end of the hydraulic control valve block.

The utility model provides a hydraulic equipment, hydraulic equipment includes equipment body and foretell hydraulic control system, wherein:

the hydraulic cylinder is arranged on the equipment body, the electric control box and the hydraulic control valve block are separated from the equipment body, and the electric control box and the hydraulic control valve block are arranged on positions close to the equipment body.

From top to bottom, the utility model discloses a hydraulic control valve piece, hydraulic control system and hydraulic equipment's characteristics and advantage are: a first oil pipeline of a control loop is connected between an oil inlet of a hydraulic source and a rodless cavity of the hydraulic cylinder, a second oil pipeline of the control loop is connected between a hydraulic oil return port of the hydraulic source and a rod cavity of the hydraulic cylinder, the hydraulic cylinder is controlled to normally work through the control loop, normal operations such as normal starting, reversing, fast and slow speed adjustment and the like of the hydraulic cylinder can be realized, and equipment driven by the hydraulic cylinder can be ensured to be in a normal and stable working state; the control circuit is additionally provided with a brake circuit, when the hydraulic equipment needs to stop working, the control circuit is disconnected and automatically switched to the brake circuit, the synchronous motor is driven to start through a first high-pressure medium in the control circuit, so that the first high-pressure medium in a rodless cavity of the hydraulic cylinder is conveyed and flows back to a hydraulic source through the synchronous motor, the pressure for driving the hydraulic cylinder to act is smaller than the external atmospheric pressure, the hydraulic cylinder is guaranteed to brake under the common working condition of accuracy, stability and no impact, the hydraulic cylinder is guaranteed to realize the whole braking process within a preset time period and a preset stroke range, and the refined control of the braking of the hydraulic equipment is completed.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

FIG. 1: do the utility model discloses the inner structure connection diagram of hydraulic control valve piece.

FIG. 2: do the utility model discloses control circuit's local enlarger in the hydraulic control valve piece.

FIG. 3: do the utility model discloses the local enlarger of brake circuit in the hydraulic control valve piece.

FIG. 4: do the utility model discloses hydraulic control system's connection block diagram.

FIG. 5: do the utility model discloses hydraulic equipment's connection block diagram.

The utility model provides an reference numeral does:

1. a control loop; 101. A second electromagnetic directional valve;

102. a third electromagnetic directional valve; 103. A logic valve;

104. a second hydraulic control one-way valve; 2. A brake circuit;

201. a first electromagnetic directional valve; 202. A synchronous motor;

2021. a second flow spindle; 2022. A first flow spindle;

203. a first hydraulic control check valve; 204. A one-way valve;

3. a hydraulic source; 4. An electrical control box;

5. a hydraulic cylinder; 501. A rodless cavity;

502. a rod cavity; 6. An apparatus body;

p0, a hydraulic oil inlet; t0, hydraulic return;

p1, a second main oil inlet; t1, second main oil return;

b1 and a third working oil port; p2, a third main oil inlet;

t2, third main oil return; a2, a fourth working oil port;

b2 and a fifth working oil port; p3, a first main oil inlet;

t3, first main oil return; a3, a first working oil port;

b3 and a second working oil port; 11. A second oil inlet;

12. a second oil outlet; 1X, a second pilot port;

21. a first oil inlet; 22. A first oil outlet;

2X, a first pilot port; 31. A first interface;

32. a second interface; 33. A third control port;

41. a liquid inlet; 42. A liquid outlet;

a1, a second outflow port; a2, a second inlet;

b1, a first outflow port; b2, a first inlet;

t01, first channel; t02, second channel;

t03, third channel; t04, fourth channel;

t05, fifth channel; p11, sixth channel;

p12, seventh channel; p13, eighth lane;

a11, ninth channel; a12, tenth lane;

b11, eleventh channel; b12, twelfth channel;

b13, thirteenth channel; b14, fourteenth channel.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

Implementation mode one

As shown in fig. 1 to 3, the utility model provides a hydraulic control valve block, this hydraulic control valve block include control circuit 1 and brake circuit 2, and control circuit 1 is used for controlling the work of pneumatic cylinder 5, and brake circuit 2 is used for cooperating with control circuit 1 and controls the braking of pneumatic cylinder 5, wherein: one end of a first oil pipeline in the control circuit 1 is communicated with a hydraulic oil inlet P0 of the hydraulic source 3, the other end of the first oil pipeline is communicated with a rodless cavity 501 of the hydraulic cylinder 5, one end of a second oil pipeline in the control circuit 1 is communicated with a hydraulic oil return port T0 of the hydraulic source 3, the other end of the second oil pipeline is communicated with a rod cavity 502 of the hydraulic cylinder 5, a first high-pressure medium is conveyed into the rodless cavity 501 of the hydraulic cylinder 5 through the first oil pipeline of the control circuit 1 by a hydraulic oil inlet P0 of the hydraulic source 3, so that a piston in the hydraulic cylinder 5 is pushed to move towards the rod cavity 502 by the first high-pressure medium, and an original second high-pressure medium in the rod cavity 502 flows back to the hydraulic oil return port T0 of the hydraulic source 3 through the second oil pipeline of the control circuit 1, and normal operation of the hydraulic cylinder 5 can be guaranteed. The brake circuit 2 comprises a first electromagnetic directional valve 201, a synchronous motor 202 and a first pilot-controlled check valve 203, a first main oil inlet P3 of the first electromagnetic directional valve 201 is connected with a first oil pipeline of the control circuit 1, a first main oil return port T3 of the first electromagnetic directional valve 201 is communicated with a hydraulic oil return port T0 of a hydraulic source 3 through a fourth passage T04, a first working oil port A3 of the first electromagnetic directional valve 201 is connected with a first flow outlet B1 of the synchronous motor 202, a second working oil port B3 of the first electromagnetic directional valve 201 is connected with a first pilot port 2X of the first pilot-controlled check valve 203 through a twelfth passage B12 and a fourteenth passage B14 in sequence, a twelfth passage B12 is communicated with a fourteenth passage B14, a second working oil port B3 of the first electromagnetic directional valve 201 is connected with a first flow inlet B2 of the synchronous motor 202 through an eleventh passage B11, a second flow inlet a2 of the synchronous motor 202 is connected with a first pilot-controlled check valve 21 of the first pilot-controlled check valve 203, the first oil outlet 22 of the first pilot-controlled check valve 203 is communicated with the rodless cavity 501 of the hydraulic cylinder 5 through a tenth passage a12, the first pilot-controlled check valve 203 is communicated in a single direction from the synchronous motor 202 to the hydraulic cylinder 5, and the second outlet a1 of the synchronous motor 202 is communicated with the hydraulic oil return port T0 of the hydraulic source 3 through a third passage T03.

The utility model discloses be connected with the first oil pipeline of control circuit 1 between the no pole chamber 501 of hydraulic pressure oil inlet P0 of hydraulic pressure source 3 and pneumatic cylinder 5, be connected with the second oil pipeline of control circuit 1 between the hydraulic pressure oil return opening T0 of hydraulic pressure source 3 and the pole chamber 502 of pneumatic cylinder 5, control pneumatic cylinder 5 through control circuit 1 and normally work, can realize the normal start of pneumatic cylinder 5, conventional operations such as switching-over and speed adjustment, guarantee that the equipment of pneumatic cylinder 5 drive can be in normal, stable operating condition; the brake circuit 2 is additionally arranged on the control circuit 1, when the hydraulic equipment needs to stop working, the control circuit 1 is disconnected and automatically switched to the brake circuit 2, the synchronous motor 202 is driven to start through the first high-pressure medium in the control circuit 1, so that the first high-pressure medium in the rodless cavity 501 of the hydraulic cylinder 5 is conveyed and flows back to the hydraulic source 3 through the synchronous motor 202, the pressure for driving the hydraulic cylinder 5 to act is smaller than the external atmospheric pressure, the hydraulic cylinder 5 is guaranteed to brake under the accurate, stable and impact-free common working condition, the hydraulic cylinder 5 is guaranteed to be capable of achieving the whole brake process within the preset time period and the preset stroke range, and the refined control over the brake of the hydraulic equipment is completed.

In an optional embodiment of the present invention, as shown in fig. 1 and fig. 3, a check valve 204 is disposed between the synchronous motor 202 and the hydraulic source 3, the check valve 204 is communicated in one direction from the hydraulic source 3 to the synchronous motor 202, a liquid inlet 41 of the check valve 204 is communicated with a hydraulic oil return port T0 of the hydraulic source 3 through a fifth passage T05, and a liquid outlet 42 of the check valve 204 is communicated with a second inflow port a2 of the synchronous motor 202. When the second high-pressure medium introduced into the synchronous motor 202 through the second inflow port a2 is insufficient, the check valve 204 may be controlled to be opened to supplement the high-pressure medium into the second inflow port a2 through the fifth passage T05 and the check valve 204.

Further, check valve 204 may be, but is not limited to, a pilot operated check valve or an electrically controlled check valve.

In an optional embodiment of the present invention, as shown in fig. 1 and fig. 2, the control circuit 1 includes a second electromagnetic directional valve 101, a third electromagnetic directional valve 102, a logic valve 103, and a second hydraulic check valve 104, wherein: a second main oil inlet P1 of the second electromagnetic directional valve 101 is communicated with a hydraulic oil inlet P0 of the hydraulic source 3, a second main oil return port T1 of the second electromagnetic directional valve 101 is communicated with a hydraulic oil return port T0 of the hydraulic source 3 through a first passage T01, a third working oil port B1 of the second electromagnetic directional valve 101 is connected with the first main oil inlet P3 of the first electromagnetic directional valve 201 through an eighth passage P13, a third working oil port B1 of the second electromagnetic directional valve 101 is connected with a second pilot port 1X of the second hydraulic check valve 104 through a seventh passage P12, a third working oil port B1 of the second electromagnetic directional valve 101 is communicated with a third main oil inlet P2 of the third electromagnetic directional valve 102 through a sixth passage P11, a third main oil return port T2 of the third electromagnetic directional valve 102 is communicated with a hydraulic oil return port T0 of the hydraulic source 3 through a second passage T02, and a fourth main oil return port T9638 of the third electromagnetic directional valve 102 is connected with a first pilot port 3931 of the hydraulic check valve 102, the second port 32 of the logic valve 103 is communicated with the rodless cavity 501 of the hydraulic cylinder 5 through a ninth passage a11, the fifth working oil port B2 of the third electromagnetic directional valve 102 is connected with the second oil inlet 11 of the second hydraulic one-way valve 104, and the second oil outlet 12 of the second hydraulic one-way valve 104 is communicated with the rod cavity 502 of the hydraulic cylinder 5.

Further, as shown in fig. 1, the third control port 33 of the logic valve 103 is connected to the second working port B3 of the first electromagnetic directional valve 201 via a thirteenth passage B13 and a twelfth passage B12 in this order, and the thirteenth passage B13 is communicated with the twelfth passage B12. During the braking process of the hydraulic cylinder 5, a part of the first high-pressure medium can be conveyed into the logic valve 103 through the third control port 33 of the logic valve 103 through the second working oil port B3 of the first electromagnetic directional valve 201, so as to push the valve core in the logic valve 103 to be stably reset, and the logic valve 103 is ensured to be in the off position in the braking state of the hydraulic cylinder 5.

Further, the first electromagnetic directional valve 201 and the second electromagnetic directional valve 101 may be, but not limited to, two-position four-way solenoid valves, and the third electromagnetic directional valve 102 may be, but not limited to, three-position four-way solenoid valves.

Further, the synchronous motor 202 can be, but is not limited to, a two-flow synchronous motor, and a first rotating shaft 2022 and a second rotating shaft 2021 which can rotate synchronously and in the same direction are disposed in the synchronous motor 202, the first rotating shaft 2022 is located opposite to the first outlet b1 and the first inlet b2, and the second rotating shaft 2021 is located opposite to the second outlet a1 and the second inlet a 2.

The utility model discloses an operating condition of hydraulic control valve piece (wherein: be initial condition in the complete retraction pneumatic cylinder 5 of the piston rod of pneumatic cylinder 5, first solenoid directional valve 201, second solenoid directional valve 101 and third solenoid directional valve 102 all do not have the electricity for initial condition, and logic valve 103 disconnection this moment, first pilot operated check valve 203 and second pilot operated check valve 104 all are in contrary state) includes:

when the hydraulic cylinder 5 of the control circuit 1 is in a working state, controlling an electromagnet a of a second electromagnetic directional valve 101 to be electrified, communicating a second main oil inlet P1 of the second electromagnetic directional valve 101 with a third working oil port B1, communicating a first high-pressure medium in a hydraulic source 3 to a sixth channel P11, a seventh channel P12 and an eighth channel P13, and allowing the first high-pressure medium in the hydraulic source 3 to enter a second hydraulic one-way valve 104 through a third working oil port B1 and a second pilot port 1X in sequence so as to disable a check function of the second hydraulic one-way valve 104 (namely, communicating a second oil inlet 11 and a second oil outlet 12 of the second hydraulic one-way valve 104); meanwhile, the electromagnet B of the third electromagnetic directional valve 102 is controlled to be electrified, the third main oil inlet P2 of the third electromagnetic directional valve 102 is communicated with the fourth working oil port a2, the third main oil return port T2 of the third electromagnetic directional valve 102 is communicated with the fifth working oil port B2, a first high-pressure medium sequentially passes through the third working oil port B1, the third main oil inlet P2, the fourth working oil port a2 and the first interface 31 to enter the logic valve 103, the logic valve 103 acts under the pressure action of the first high-pressure medium, the first interface 31 of the logic valve 103 is communicated with the second interface 32, and the first high-pressure medium can enter the rodless cavity 501 of the hydraulic cylinder 5 through the second interface 32 of the logic valve 103, so as to push the piston in the hydraulic cylinder 5 to move towards the direction of the rod cavity 502, the piston rod of the hydraulic cylinder 5 moves outwards and extends out, and the piston rod of the hydraulic cylinder 5 can drive the load to move forwards. At this time, the original second high-pressure medium in the rod chamber 502 sequentially flows through the second oil outlet 12 and the second oil inlet 11 of the second pilot-operated check valve 104, the fifth working oil port B2 and the third main oil return port T2 of the third electromagnetic directional valve 102, and the hydraulic oil return port T0 of the hydraulic source 3 and flows back into the hydraulic source 3.

Secondly, when the hydraulic cylinder 5 is controlled by the brake circuit 2 to be in a braking state (the sending time of a braking instruction can be controlled according to a preset speed-time curve or a stroke-time curve, and when the load movement is about to stop or the load movement reaches a braking stroke from a tail end stop position, such as setting the braking time to be 1.5s to 3s or the braking stroke to be 10mm, and the like, wherein the braking time or the braking stroke is already configured when the hydraulic cylinder 5 and the synchronous motor 202 are selected), controlling the electromagnet b of the third electromagnetic directional valve 102 to lose power, controlling the valve core of the third electromagnetic directional valve 102 to reset, disconnecting the communication state between the third main oil inlet P2 and the fourth working oil port A2 of the third electromagnetic directional valve 102, and at the moment, due to the inertia of the self movement of the hydraulic equipment, the volume of the rodless cavity 501 of the hydraulic cylinder 5 can continuously increase, the pressure in the rodless chamber 501 is reduced, and the pressure in the second port 32 of the logic valve 103 is reduced, so that the logic valve 103 resets the spool of the logic valve 103, and the first port 31 and the second port 32 of the logic valve 103 are disconnected, and of course, the second high-pressure medium in the rod chamber 502 of the hydraulic cylinder 5 is pushed by the piston to continue flowing back to the hydraulic pressure source 3 in the process again. Controlling the electromagnet a of the first electromagnetic directional valve 201 to be electrified, the first main oil inlet P3 of the first electromagnetic directional valve 201 to be communicated with the second working oil port B3, the first main oil return port T3 of the first electromagnetic directional valve 201 to be communicated with the first working oil port A3, the first high-pressure medium in the hydraulic source 3 to be communicated with the second working oil port B3 of the first electromagnetic directional valve 201 through the first electromagnetic directional valve 201, wherein a part of the first high-pressure medium flows into the logic valve 103 through the twelfth passage B12, the thirteenth passage B13 and the third control port 33 in this order, so as to push the valve core in the logic valve 103 to stably reset to the off position, the other part of the first high-pressure medium will enter the first pilot-controlled check valve 203 through the twelfth channel B12, the fourteenth channel B14 and the first oil outlet 22 of the first pilot-controlled check valve 203 in sequence, and the check of the first pilot-controlled check valve 203 fails under the pressure of the first high-pressure medium; a third part of the first high-pressure medium in the second electromagnetic directional valve 101 sequentially passes through the third working oil port B1 of the second electromagnetic directional valve 101, the first main oil inlet P3 and the second working oil port B3 of the first electromagnetic directional valve 201 and the first inflow inlet B2 of the synchronous motor 202 to enter the synchronous motor 202, so as to drive the synchronous motor 202 to rotate, the second rotating shaft 2021 of the synchronous motor 202 will drive the first rotating shaft 2022 to rotate synchronously, the first high-pressure medium in the rodless cavity 501 of the hydraulic cylinder 5 is sucked into the synchronous motor 202 through the tenth channel a12, the first pilot-controlled check valve 203 and the second inlet a2 of the synchronous motor 202 in sequence, and flows back into the hydraulic pressure source 3 through the second outlet a1 of the synchronous motor 202 and the hydraulic oil return port T0 of the hydraulic pressure source 3, at which time the hydraulic pressure of the hydraulic cylinder 5 driving the piston is lower than the atmospheric pressure of the outside, so that the hydraulic cylinder 5 and the hydraulic equipment driven by the hydraulic cylinder 5 are self-braked.

The utility model discloses a characteristics and advantage of hydraulic control valve piece are:

the hydraulic control valve block is characterized in that a first oil pipeline of a control circuit 1 is connected between a hydraulic oil inlet P0 of a hydraulic source 3 and a rodless cavity 501 of a hydraulic cylinder 5, a second oil pipeline of the control circuit 1 is connected between a hydraulic oil return port T0 of the hydraulic source 3 and a rod cavity 502 of the hydraulic cylinder 5, the hydraulic cylinder 5 is controlled to normally work through the control circuit 1, normal operations such as normal starting, reversing, speed adjustment and the like of the hydraulic cylinder 5 can be realized, and equipment driven by the hydraulic cylinder 5 can be ensured to be in a normal and stable working state.

The hydraulic control valve block is characterized in that a brake circuit 2 is additionally arranged on a control circuit 1, when hydraulic equipment needs to stop working, the control circuit 1 is disconnected and automatically switched to the brake circuit 2, a synchronous motor 202 is driven to start through a first high-pressure medium in the control circuit 1, so that the first high-pressure medium in a rodless cavity 501 of a hydraulic cylinder 5 is conveyed and flows back to a hydraulic source 3 through the synchronous motor 202, the pressure for driving the hydraulic cylinder 5 to act is smaller than external atmospheric pressure, braking of the hydraulic cylinder 5 under the common working condition of accuracy, stability and no impact is guaranteed, the hydraulic cylinder 5 is guaranteed to be capable of achieving the whole braking process within a preset time period and a preset stroke range, and fine control over braking of the hydraulic equipment is completed.

Second embodiment

As shown in fig. 4, the utility model provides a hydraulic control system, this hydraulic control system include hydraulic pressure source 3, electrical control box 4, pneumatic cylinder 5 and foretell hydraulic control valve piece, wherein: the hydraulic source 3 is respectively connected with a rodless cavity 501 of the hydraulic cylinder 5 and a rod cavity 502 of the hydraulic cylinder 5 through the control circuit 1, and the hydraulic source 3 is connected with the rodless cavity 501 of the hydraulic cylinder 5 through the brake circuit 2; a controller is arranged in the electric control box 4, and a control signal output end of the controller is electrically connected with a control end of the hydraulic control valve block.

The utility model discloses a hydraulic control system controls the connected state of each single switching-over valve in the hydraulic control valve block through the controller in the electrical control box 4 to control the operating condition of control circuit 1 and braking circuit 2 in the hydraulic control valve block respectively, can carry out the on-the-spot operation or remote operation as required, make things convenient for staff's operation control. When the brake circuit 2 is disconnected, the control circuit 1 is communicated with the hydraulic source 3, the rodless cavity 501 and the rod cavity 502 of the hydraulic cylinder 5, and normal work of the hydraulic cylinder 5 is ensured; when the control circuit 1 is disconnected, the brake circuit 2 communicates the hydraulic source 3 with the rodless cavity 501 of the hydraulic cylinder 5, so that high-pressure medium in the rodless cavity 501 flows back to the hydraulic source 3, and the quick braking of the hydraulic cylinder 5 is ensured.

Third embodiment

As shown in fig. 5, the utility model provides a hydraulic equipment, this hydraulic equipment includes equipment body 6 and foretell hydraulic control system, wherein: the hydraulic cylinder 5 is arranged on the equipment body 6, the electric control box 4 and the hydraulic control valve block are both separated from the equipment body 6, and the electric control box 4 and the hydraulic control valve block are both arranged on the position close to the equipment body 6.

The utility model discloses accessible hydraulic control system is quick, accurately controls hydraulic equipment's work and braking, and control is simple, can realize steady, accurate braking operation, is particularly useful for the hydraulic equipment that the load is big, fast and frequent action, is suitable for and uses widely in trades, many fields.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.

Claims (9)

1. A hydraulic control valve block, characterized in that it comprises a control circuit (1) able to control the operation of a hydraulic cylinder (5) and a braking circuit (2) able to control the braking of said hydraulic cylinder (5), wherein:

two ends of a first oil pipeline of the control circuit (1) are respectively communicated with a hydraulic oil inlet (P0) of a hydraulic source (3) and a rodless cavity (501) of the hydraulic cylinder (5), and two ends of a second oil pipeline of the control circuit (1) are respectively communicated with a hydraulic oil return port (T0) of the hydraulic source (3) and a rod cavity (502) of the hydraulic cylinder (5);

the brake circuit (2) comprises a first electromagnetic directional valve (201), a synchronous motor (202) and a first hydraulic control one-way valve (203), a first main oil inlet (P3) of the first electromagnetic directional valve (201) is connected with a first oil delivery pipeline of the control circuit (1), a first main oil return port (T3) of the first electromagnetic directional valve (201) is used for being communicated with a hydraulic oil return port (T0) of a hydraulic source (3), a first working oil port (A3) of the first electromagnetic directional valve (201) is connected with a first flow outlet (B1) of the synchronous motor (202), a second working oil port (B3) of the first electromagnetic directional valve (201) is respectively connected with a first pilot port (2X) of the first hydraulic control one-way valve (203) and a first flow inlet (B2) of the synchronous motor (202), and a second flow inlet (a2) of the synchronous motor (202) is connected with a first flow inlet (21) of the first hydraulic control one-way valve (203), the first oil outlet (22) of the first hydraulic control one-way valve (203) is used for being communicated with a rodless cavity (501) of the hydraulic cylinder (5), and the second flow outlet (a1) of the synchronous motor (202) is used for being communicated with a hydraulic oil return port (T0) of the hydraulic source (3).

2. The hydraulic control valve block as recited in claim 1, characterized in that a check valve (204) is arranged between the synchronous motor (202) and the hydraulic source (3), an inlet (41) of the check valve (204) is used for communicating with a hydraulic return port (T0) of the hydraulic source (3), and an outlet (42) of the check valve (204) is communicated with a second inlet (a2) of the synchronous motor (202).

3. The hydraulic control valve block as claimed in claim 1, characterized in that the control circuit (1) comprises a second solenoid directional valve (101), a third solenoid directional valve (102), a logic valve (103), and a second hydraulically controlled check valve (104), wherein:

a second main oil inlet (P1) of the second electromagnetic directional valve (101) is used for being communicated with a hydraulic oil inlet (P0) of the hydraulic source (3), a second main oil return port (T1) of the second electromagnetic directional valve (101) is used for being communicated with a hydraulic oil return port (T0) of the hydraulic source (3), a third working oil port (B1) of the second electromagnetic directional valve (101) is respectively connected with the first main oil inlet (P3) of the first electromagnetic directional valve (201), a second pilot port (1X) of the second hydraulic one-way valve (104) and a third main oil inlet (P2) of the third electromagnetic directional valve (102), a third main oil return port (T2) of the third electromagnetic directional valve (102) is used for being communicated with a hydraulic oil return port (T0) of the hydraulic source (3), a fourth working oil port (A2) of the third electromagnetic directional valve (102) is connected with a logic interface (31) of the first logic valve (103), the second interface (32) of the logic valve (103) is communicated with a rodless cavity (501) of the hydraulic cylinder (5), a fifth working oil port (B2) of the third electromagnetic directional valve (102) is connected with a second oil inlet (11) of the second hydraulic control one-way valve (104), and a second oil outlet (12) of the second hydraulic control one-way valve (104) is communicated with a rod cavity (502) of the hydraulic cylinder (5).

4. The hydraulic control valve block as recited in claim 3, characterized in that the third control port (33) of the logic valve (103) is connected with the second working port (B3) of the first solenoid directional valve (201).

5. The hydraulic control valve block as claimed in claim 4, wherein the control circuit (1) controls the hydraulic cylinder (5) to be in an operating state, the second main oil inlet (P1) of the second electromagnetic directional valve (101) is communicated with the third working oil port (B1), and a first high-pressure medium enters the second hydraulic check valve (104) through the third working oil port (B1) and the second pilot port (1X) in sequence so as to enable the second hydraulic check valve (104) to be in non-return failure; the third main oil inlet (P2) of the third electromagnetic directional valve (102) is communicated with the fourth working oil port (a2), the third main oil return port (T2) of the third electromagnetic directional valve (102) is communicated with the fifth working oil port (B2), the first high-pressure medium sequentially passes through the third working oil port (B1), the third main oil inlet (P2), the fourth working oil port (a2) and the first interface (31) and enters the logic valve (103), and the first high-pressure medium enters the rodless cavity (501) of the hydraulic cylinder (5) through the second interface (32) of the logic valve (103) so as to push the piston in the hydraulic cylinder (5) to move towards the direction of the rod-containing cavity (502);

and a second high-pressure medium in the rod cavity (502) sequentially passes through the second oil outlet (12) and the second oil inlet (11) of the second hydraulic control one-way valve (104), the fifth working oil port (B2) and the third main oil return port (T2) of the third electromagnetic directional valve (102) and a hydraulic oil return port (T0) of the hydraulic source (3) to flow back into the hydraulic source (3).

6. The hydraulic control valve block as recited in claim 5, wherein the brake circuit (2) controls the hydraulic cylinder (5) to be in a braking state, the third main oil inlet (P2) of the third electromagnetic directional valve (102) is disconnected from the fourth working oil port (A2), the first port (31) of the logic valve (103) is disconnected from the second port (32), the first main oil inlet (P3) of the first electromagnetic directional valve (201) is communicated with the second working oil port (B3), the first main oil outlet (T3) of the first electromagnetic directional valve (201) is communicated with the first working oil port (A3), and a part of the first high-pressure medium in the second electromagnetic directional valve (101) enters the first hydraulic control one-way valve (203) through the first pilot port (2X) of the first hydraulic control valve (203), so that the first pilot-operated check valve (203) is in check failure; the other part of the first high-pressure medium in the second electromagnetic directional valve (101) sequentially enters the synchronous motor (202) through the third working oil port (B1) of the second electromagnetic directional valve (101), the first main oil inlet (P3) and the second working oil port (B3) of the first electromagnetic directional valve (201) and the first flow inlet (B2) of the synchronous motor (202) to drive the synchronous motor (202) to rotate, the pressure at the position of the second flow outlet (a1) of the synchronous motor (202) is reduced, and the first high-pressure medium in the rodless cavity (501) flows back to the hydraulic source (3) through the second flow inlet (a2) and the second flow outlet (a1) of the synchronous motor (202) and the hydraulic oil return port (T0) of the hydraulic source (3).

7. The hydraulic control valve block as recited in claim 3, characterized in that the first solenoid directional valve (201) and the second solenoid directional valve (101) are both two-position four-way solenoid valves, and the third solenoid directional valve (102) is a three-position four-way solenoid valve.

8. A hydraulic control system characterized by comprising a hydraulic pressure source (3), an electric control box (4), a hydraulic cylinder (5), and the hydraulic control valve block of any one of claims 1 to 7, wherein:

the hydraulic source (3) is respectively connected with a rodless cavity (501) of the hydraulic cylinder (5) and a rod cavity (502) of the hydraulic cylinder (5) through the control loop (1), and the hydraulic source (3) is connected with the rodless cavity (501) of the hydraulic cylinder (5) through the brake loop (2);

and a controller is arranged in the electrical control box (4), and a control signal output end of the controller is electrically connected with a control end of the hydraulic control valve block.

9. A hydraulic apparatus characterized by comprising an apparatus body (6) and the hydraulic control system recited in claim 8, wherein:

the hydraulic cylinder (5) is arranged on the equipment body (6), the electric control box (4) and the hydraulic control valve block are both separated from the equipment body (6), and the electric control box (4) and the hydraulic control valve block are both arranged on the position close to the equipment body (6).

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