CN215861039U - Cantilever crane gyration control system and concrete pump truck - Google Patents
Cantilever crane gyration control system and concrete pump truck Download PDFInfo
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- CN215861039U CN215861039U CN202121684055.0U CN202121684055U CN215861039U CN 215861039 U CN215861039 U CN 215861039U CN 202121684055 U CN202121684055 U CN 202121684055U CN 215861039 U CN215861039 U CN 215861039U
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Abstract
The utility model discloses a boom rotation control system and a concrete pump truck using the same, comprising: the electric proportional multi-way valve, the balance valve group, the rotary motor and the brake cavity; the electric proportional multi-way valve, the balance valve group, the rotary motor and the brake cavity are sequentially connected, and the rotary motor is connected with the rod cavity of the brake cavity; the electric proportional multi-way valve and the balance valve group are integrally arranged on the rotary balance valve; the utility model mainly solves the problems of pressure build-up of a braking cavity of the rotary speed reducer and uncontrollable braking intervention time of the rotary speed reducer in the prior art, realizes control of the pressure of the braking cavity and the braking intervention time of the rotary speed reducer through pipeline connection optimization, and ensures braking effectiveness.
Description
Technical Field
The utility model discloses an arm support rotation control system and a concrete pump truck, and relates to the technical field of engineering mechanical equipment.
Background
The concrete pump truck is mainly used for concrete laying and pouring to complete primary support of construction. When it normally works: the electric proportional multi-way valve is controlled through a remote controller, so that the actions of the arm support and the spray head are controlled, and the method specifically comprises the following steps: the boom is rotated (bidirectionally), the boom becomes variable amplitude, the elements used by the traditional rotation control system are imported, and the cost is high and the structure is complex; the rotary control valve produced by domestic manufacturers has unstable performance and can not ensure the quality. The problem that in the prior art, the braking cavity of a rotary speed reducer is pressed out and the braking intervention time of the rotary speed reducer is uncontrollable.
SUMMERY OF THE UTILITY MODEL
The utility model provides an arm support rotation control system and a concrete pump truck aiming at the defects in the background technology, and the rotation control valve has stable performance.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: a boom swing control system comprising: the electric proportional multi-way valve, the balance valve group, the rotary motor and the brake cavity; the electric proportional multi-way valve, the balance valve group, the rotary motor and the brake cavity are sequentially connected, and the electric proportional multi-way valve and the balance valve group are integrally arranged on the rotary balance valve;
the rotary motor is connected with a rod cavity of the brake cavity; the electric proportional multi-way valve is connected with a rod cavity of the brake cavity through a hydraulic control reversing valve and a throttle valve, a rodless cavity of the brake cavity and the rotary motor are respectively connected with a first oil tank,
the balance valve group comprises a first balance valve, a second balance valve and a shuttle valve, a first control oil port A1 of the first balance valve is connected with a sixth control oil port BK of the second balance valve, a third control oil port AK of the first balance valve is connected with a fourth control oil port B1 of the second balance valve, first working ports P1 and P2 on two sides of the shuttle valve are respectively connected with first control oil ports A1 and B1 of the first balance valve and the second balance valve, and a second working port A4 of the shuttle valve is connected with a hydraulic control reversing valve;
the first control port A1 of the first balance valve and one first working port (P1) of the shuttle valve are integrated into the port A of the rotary balance valve, and the fourth control port B1 of the second balance valve and the other first working port P2 of the shuttle valve are integrated into the port B of the rotary balance valve;
further, the electric proportional multi-way valve comprises: the first high-pressure port A7 and the second high-pressure port B7, the first high-pressure port A7 is connected with a first control port A1 of the first balance valve, and the second high-pressure port B7 is connected with a fourth control port B1 of the second balance valve.
Further, the pilot operated directional control valve includes: the main oil inlet P is connected with a second working port A4 of the shuttle valve, the main oil return port T is connected with a second oil tank, the working oil outlet A3 is connected with a first oil inlet A5 of a one-way throttle valve, and a first oil outlet A6 of the one-way throttle valve is connected with a rod cavity of the brake cavity.
Further, the rotary motor comprises seventh control oil ports and a leakage port on two sides, the two seventh control oil ports are respectively connected with the second control oil port a2 of the first balance valve 31 and the fifth control oil port B2 of the second balance valve 32, and the leakage port is connected with the first oil tank.
Further, a check valve is arranged between the first control oil port A1 and the second control oil port A2 of the first balance valve, and a check valve is arranged between the fourth control oil port B1 and the fifth control oil port B2 of the second balance valve;
the first oil inlet of the check valve 4 on the first balance valve side is connected with a first control oil port A1, and the second oil outlet of the check valve 4 on the first balance valve side is connected with a second control oil port A2.
And a second oil inlet of the check valve 4 on the second balance valve side is connected with a fourth control oil port B1, and a second oil outlet of the check valve on the second balance valve side is connected with a fifth control oil port B2.
A concrete pump truck utilizes the boom rotation control system.
The working principle is as follows: the first high-pressure oil port A7 of the electric proportional multi-way valve is connected with the port A of the rotary balance valve, the second high-pressure oil port B7 of the electric proportional multi-way valve is connected with the port B of the rotary balance valve, the port T is connected with the second oil tank, the first oil outlet A6 is connected with the brake cavity of the motor, the second control oil port A2 is connected with the seventh control oil port of the motor, and the port B2 of the fifth control oil port is connected with the seventh control oil port of the motor.
The control oil way enters the shuttle valve through the control oil duct after entering the rotary balance valve at the port A of the rotary balance valve, the oil outlet of the shuttle valve is connected with the oil inlet P of the hydraulic control reversing valve, when the pressure of the port P reaches the reversing pressure P1 of the hydraulic control reversing valve 6, the hydraulic control reversing valve reverses, the port P of the hydraulic control reversing valve is communicated with the port A3, the hydraulic control reversing valve oil port A3 reaches the braking cavity of the rotary motor through the one-way valve of the one-way throttle valve, the pressure reaches the opening pressure of the braking cavity, and the brake releases the braking; pressure oil in a main oil path enters an opening A of a rotary balance valve from an opening A7 of the electric proportional multi-way valve, passes through a check valve in a balance valve group from an opening A1, enters an oil inlet of a rotary motor from an opening A2, and the motor starts to act.
Has the advantages that: 1. the utility model adopts the integrated rotary balance valve to prevent the rotary motor brake chamber from being suppressed, the brake is invalid, and the safety is high;
2. this application can be according to actual demand design hydraulic pressure switching-over valve, adjusts set pressure, return oil throttle size, and product strong adaptability.
Drawings
FIG. 1 is a schematic structural view of the present invention.
Detailed Description
The following describes the embodiments in further detail with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, in an embodiment, a boom swing control system includes: the electric proportional multi-way valve, the balance valve group, the rotary motor 2 and the brake cavity 1; the electric proportional multi-way valve, the balance valve group, the rotary motor 2 and the brake cavity 1 are sequentially connected, and the electric proportional multi-way valve and the balance valve group are integrally arranged on the rotary balance valve 9;
the rotary motor 2 is connected with a rod cavity of the brake cavity 1; the electric proportional multi-way valve is connected with a rod cavity of the brake cavity 1 through a hydraulic control reversing valve 6 and a throttle valve 5, a rodless cavity of the brake cavity 1 and the rotary motor 2 are respectively connected with a first oil tank 81,
the balanced valve group comprises a first balanced valve 31, a second balanced valve 32 and a shuttle valve 7, a first control oil port A1 of the first balanced valve is connected with a sixth control oil port BK of the second balanced valve 32, a third control oil port AK of the first balanced valve 31 is connected with a fourth control oil port B1 of the second balanced valve 32, first working ports P1 and P2 on two sides of the shuttle valve 7 are respectively connected with a first control oil port A1 and a fourth control oil port B1 of the first balanced valve 32 and the second working port A4 of the shuttle valve 7 is connected with a hydraulic control reversing valve 6;
the first control port A1 of the first balance valve and one first working port P1 of the shuttle valve 7 are integrated into the port A of the rotary balance valve, and the fourth control port B1 of the second balance valve and the other first working port P2 of the shuttle valve 7 are integrated into the port B of the rotary balance valve;
the electric proportional multi-way valve comprises: the first high-pressure port a7 and the second high-pressure port B7, the first high-pressure port a7 is connected with a first control port a1 of the first balance valve 31, and the second high-pressure port B7 is connected with a fourth control port B1 of the second balance valve 32.
The hydraulic control reversing valve 6 comprises: the main oil inlet P is connected with a second working port A4 of the shuttle valve 7, the main oil return port T is connected with a second oil tank 82, the working oil outlet A3 is connected with a first oil inlet A5 of the one-way throttle valve 5, and a first oil outlet A6 of the one-way throttle valve 5 is connected with a rod cavity of the brake cavity 1.
The rotary motor 2 includes seventh control ports and a leakage port on both sides, the two seventh control ports are respectively connected with the second control port a2 of the first balance valve 31 and the fifth control port B2 of the second balance valve 32, and the leakage port is connected with the first oil tank 81.
A check valve 4 is arranged between the first control oil port A1 and the second control oil port A2 of the first balance valve 31, and a check valve 4 is arranged between the fourth control oil port B1 and the fifth control oil port B2 of the second balance valve 32;
a second oil inlet of the check valve 4 on the first balance valve side is connected with a first control oil port A1, and a second oil outlet of the check valve 4 is connected with a second control oil port A2;
and a second oil inlet of the check valve 4 on the second reversing valve side is connected with a fourth control oil port B1, and a second oil outlet of the check valve 4 is connected with a fifth control oil port B2.
The slewing startup process of this embodiment:
high-pressure oil is provided for the electric proportional multi-way valve through an external oil source, and when an external output signal is gradually increased, the high-pressure oil is discharged from an A7 port (or a B7 port) corresponding to the rotary balance valve and enters an oil inlet of the rotary motor 2 through a check valve 4 on the balance valve group; in the starting process, when the pressure of the port A (or the port B) of the rotary balance valve rises to the reversing pressure of the hydraulic control reversing valve 6, the hydraulic control reversing valve reverses and reaches the brake cavity 1 of the rotary motor 2 through the one-way valve in the one-way throttle valve 5, when the pressure reaches the brake cavity brake release pressure, the brake is released, and the rotary motor starts to act.
During the starting process, the hydraulic control reversing valve controls the pressure regulation to realize the control of the acting time of the brake.
The rotary operation process of the embodiment:
and in the process of rotating and running stably, the corresponding hydraulic control reversing valve is in a working position.
The slewing stop process of the embodiment:
when the external output signal is gradually reduced, the valve port corresponding to the rotary balance valve is gradually closed, the flow rate corresponding to the high-pressure port A7 (or the port B7) is gradually reduced, and the movement speed of the rotary motor 2 is gradually reduced; when the pressure at the port a (or the port B) decreases to a certain degree, the balance valve 3 is gradually closed. After the pressure is reduced to a certain value, high-pressure oil selected by the shuttle valve 7 flows to the hydraulic control reversing valve 6, the hydraulic control reversing valve 6 returns to the initial position, the brake cavity 1 returns to the oil tank through the throttle opening of the one-way throttle valve 5, the size of the throttle opening can control the pressure change speed of the brake cavity 1 until the brake release can not be kept, and at the moment, the rotary motor 2 stops. During the stopping process, the input signal is gradually reduced along with the rotation of the rotor.
The control parameters of the hydraulic control reversing valve 3 and the parameters of the throttling opening of the one-way throttle valve are set, so that the control of the pressure and the braking time of a control cavity of the rotary speed reducer is realized.
The hydraulic control reversing valve can be replaced by two overflow valves with electric proportion. The two electric proportional overflow valves respectively control the movement in two directions; meanwhile, the electric proportional overflow valve is preferably in an inverse proportion mode, namely: when no signal is available, the set pressure is maximum, and the set value is reduced along with the increase of the signal.
A concrete pump truck applying the boom rotation control system of any one of claims 1 to 5.
The utility model adopts the integrated rotary balance valve to prevent the rotary motor brake chamber from being suppressed, the brake is invalid, and the safety is high;
this application can be according to actual demand design hydraulic pressure switching-over valve, adjusts set pressure, return oil throttle size, and product strong adaptability.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A boom swing control system comprising: the electric proportional multi-way valve, the balance valve group, the rotary motor (2) and the brake cavity (1); the electric proportional multi-way valve, the balance valve group, the rotary motor (2) and the brake cavity (1) are sequentially connected, and the rotary motor (2) is connected with a rod cavity of the brake cavity (1); the electric proportional multi-way valve and the balance valve group are integrally arranged on a rotary balance valve (9);
the electric proportional multi-way valve is connected with a rod cavity of the brake cavity (1) through a hydraulic control reversing valve (6) and a throttle valve (5), a rodless cavity of the brake cavity (1) and the rotary motor (2) are respectively connected with a first oil tank (81),
the balanced valve group comprises a first balanced valve (31), a second balanced valve (32) and a shuttle valve (7), wherein a first control oil port (A1) of the first balanced valve is connected with a sixth control oil port (BK) of the second balanced valve (32), a third control oil port (AK) of the first balanced valve (31) is connected with a fourth control oil port (B1) of the second balanced valve (32), first working ports (P1, P2) on two sides of the shuttle valve (7) are respectively connected with first control oil ports (A1, B1) of the first balanced valve (32) and the second working port (A4) of the shuttle valve (7) is connected with a hydraulic control reversing valve (6).
2. The boom swing control system of claim 1, wherein the electro proportional multi-way valve comprises: the first high-pressure oil port (A7) and the second high-pressure oil port (B7), the first high-pressure oil port (A7) is connected with a first control oil port (A1) of the first balance valve (31), and the second high-pressure oil port (B7) is connected with a fourth control oil port (B1) of the second balance valve (32).
3. The boom slewing control system according to claim 1, wherein the pilot operated directional control valve (6) comprises: the hydraulic brake system comprises a main oil return port (T), a main oil inlet (P) and a working oil outlet (A3), wherein the main oil inlet (P) is connected with a second working port (A4) of a shuttle valve (7), the main oil return port (T) is connected with a second oil tank (82), the working oil outlet (A3) is connected with a first oil inlet (A5) of a one-way throttle valve (5), and a first oil outlet (A6) of the one-way throttle valve (5) is connected with a rod cavity of a brake cavity (1).
4. The boom swing control system according to claim 1, wherein the swing motor (2) comprises seventh control oil ports and leakage ports on two sides, the seventh control oil ports are respectively connected with the second control oil port (A2) of the first balance valve (31) and the fifth control oil port (B2) of the second balance valve (32), and the leakage port is connected with the first oil tank (81).
5. The boom swing control system according to claim 1, wherein a check valve (4) is arranged between the first control oil port (A1) and the second control oil port (A2) of the first balance valve (31), and a check valve (4) is arranged between the fourth control oil port (B1) and the fifth control oil port (B2) of the second balance valve (32).
6. A concrete pump truck characterized in that the boom rotation control system of any one of the claims 1 to 5 is applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121684055.0U CN215861039U (en) | 2021-07-23 | 2021-07-23 | Cantilever crane gyration control system and concrete pump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121684055.0U CN215861039U (en) | 2021-07-23 | 2021-07-23 | Cantilever crane gyration control system and concrete pump truck |
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| Publication Number | Publication Date |
|---|---|
| CN215861039U true CN215861039U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121684055.0U Active CN215861039U (en) | 2021-07-23 | 2021-07-23 | Cantilever crane gyration control system and concrete pump truck |
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| Country | Link |
|---|---|
| CN (1) | CN215861039U (en) |
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2021
- 2021-07-23 CN CN202121684055.0U patent/CN215861039U/en active Active
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