Control loop of high-speed heavy-load actuating mechanism and control system of high-speed heavy-load actuating mechanism

Abstract

The utility model belongs to the technical field of hydraulic control, and relates to a control loop of a high-speed heavy-load actuating mechanism and a control system of the control loop. A control loop of a high-speed heavy-load executing mechanism comprises a balance valve assembly, the balance valve assembly comprises a first one-way sequence valve and a second one-way sequence valve, the first one-way sequence valve comprises a first one-way valve and a first sequence valve, and the second one-way sequence valve comprises a second one-way valve and a second sequence valve; before the execution mechanism operates, one-way throttling can be adjusted according to equipment requirements, and the maximum operation speed of equipment is set; in the operation process of the executing mechanism, the balance valve can determine the size of the opening according to the load so as to adjust the operation speed of the executing mechanism.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic control and relates to a control circuit of a high-speed heavy-load actuator and a control system thereof. Background Art

[0002] In the current hydraulic system, each equipment hydraulic cylinder control circuit is composed of a reversing valve, a one-way throttle valve, and a hydraulically controlled one-way valve. Figure 1 As shown, when the equipment is to work, the reversing valve 2 is in the working function (as shown in the arrow direction of the reversing valve 2 in the figure), and the pressure oil provided by the power station 1 enters the P port of the reversing valve 2, and enters one of the chambers of the equipment hydraulic cylinder through the hydraulic control check valve 3, the third one-way throttle valve 12 and the ball valve 6 after leaving the reversing valve 2, completing the action that the equipment needs to complete. The oil in the other chamber of the equipment hydraulic cylinder passes through the ball valve 6, the third one-way throttle valve 12, the hydraulic control check valve 3 and the reversing valve 2 in turn and then returns to the first oil tank 8. The reversing valve 2 realizes the reversing operation of the equipment hydraulic cylinder, the third one-way throttle valve 12 is used to adjust the speed of the equipment, and the function of the hydraulic control check valve 3 is to prevent the oil from flowing back, and also to keep a certain back pressure in the return oil pipeline, thereby increasing the stability of the equipment movement.

[0003] At present, the commonly used pressure-maintaining device in the hydraulic circuit is the hydraulically controlled one-way valve. The hydraulic cylinder control circuit has two disadvantages: one is that the speed can only be adjusted once; the other is that it is used in the locking circuit to prevent the actuator from sliding down (such as the sinking of the cylinder), but it does not play a role in limiting the speed, causing the load to produce greater impact and vibration during the falling process. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a control loop and control system of a high-speed heavy-load actuator.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A control circuit of a high-speed heavy-load actuator includes a balancing valve assembly, wherein the balancing valve assembly includes a first one-way sequence valve and a second one-way sequence valve, wherein the first one-way sequence valve includes a first one-way valve and a first sequence valve, and the second one-way sequence valve includes a second one-way valve and a second sequence valve;

[0007] The balancing valve assembly is provided with a first control oil circuit and a second control oil circuit; the two ends of the first control oil circuit are connected to the first valve port of the reversing valve and the second sequence valve, and the two ends of the second control oil circuit are connected to the second valve port of the reversing valve and the first sequence valve;

[0008] The power station is connected in sequence to the first valve port of the reversing valve, the first one-way sequence valve, the first one-way throttle valve, the first ball valve, the actuator, the second ball valve, the second one-way throttle valve, the second one-way sequence valve, and the second valve port of the reversing valve;

[0009] The reversing valve is used to control the forward conduction or reverse locking of the first one-way valve and the second one-way valve;

[0010] The opening size of the first sequence valve or the second sequence valve is adjusted according to the load size of the actuator, thereby adjusting the operating speed of the actuator.

[0011] Furthermore, the first one-way throttle valve and the second one-way throttle valve are used to adjust the speed of the actuator for the first time.

[0012] Furthermore, when the reversing valve is in a neutral position, the first one-way valve and the second one-way valve are reversely locked; when the reversing valve is in a forward position, the first one-way valve is turned on; when the reversing valve is in a reverse position, the second one-way valve is turned on.

[0013] Furthermore, pressure measuring ports are provided between the first one-way valve and the first ball valve, and between the second one-way valve and the second ball valve.

[0014] Furthermore, the first valve port of the reversing valve is connected to the first one-way valve; and the second valve port of the reversing valve is connected to the second one-way valve.

[0015] Furthermore, it includes a control circuit of a high-speed and heavy-load actuator.

[0016] Furthermore, the actuator includes a first chamber and a second chamber.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] First, before the actuator is operated, the one-way throttling can be adjusted according to the equipment requirements to set the maximum operating speed of the equipment.

[0019] Second, during the operation of the actuator, the balancing valve can determine the size of the opening according to the size of the load (i.e. the size of the pressure), thereby adjusting the operating speed of the actuator.

[0020] Third, during the operation of the actuator, a certain back pressure is established to prevent the main working part of the hydraulic cylinder or motor from generating negative pressure due to excessive speed sliding due to its own weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings herein are incorporated into and constitute a part of this specification, and together with the description, are used to explain the principles of the present utility model.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 It is a schematic diagram of a control loop in the prior art;

[0024] Figure 2 It is a schematic diagram of the control circuit of the present invention;

[0025] Figure 3 It is a schematic diagram of the oil path in the balancing valve assembly of the present invention;

[0026] Figure 4 This is a front view of the control pipeline of the present invention;

[0027] Figure 5 It is a side view of the control pipeline of the present invention;

[0028] Figure 6 It is a front view of the assembled valve block of the present invention;

[0029] Figure 7 A side view of a partial pipeline of an assembled valve block of the present invention;

[0030] Figure 8 A detailed view of a local pipeline of an assembled valve block of the present invention;

[0031] Among them: 1 is the power station; 2 is the reversing valve; 3 is the hydraulically controlled one-way valve; 3-1 is the first one-way sequence valve; 3-2 is the second one-way sequence valve; 4 is the first one-way throttle valve; 5 is the pressure measuring port; 6 is the first ball valve; 7 is the actuator; 9 is the oil tank; 10 is the second ball valve; 11 is the second one-way throttle valve; 12 is the third one-way throttle valve. DETAILED DESCRIPTION

[0032] Here, exemplary embodiments will be described in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present utility model. Instead, they are only examples of devices consistent with some aspects of the present utility model as detailed in the attached claims.

[0033] Example

[0034] A control circuit of a high-speed heavy-load actuator includes a balancing valve assembly, the balancing valve assembly includes a first one-way sequence valve 3-1 and a second one-way sequence valve 3-2, the first one-way sequence valve 3-1 includes a first one-way valve and a first sequence valve, and the second one-way sequence valve 3-2 includes a second one-way valve and a second sequence valve;

[0035] The balancing valve assembly is provided with a first control oil circuit and a second control oil circuit; the two ends of the first control oil circuit are connected to the first valve port of the reversing valve 2 and the second sequence valve, and the two ends of the second control oil circuit are connected to the second valve port of the reversing valve 2 and the first sequence valve;

[0036] The power station 1 is connected in sequence with the first valve port of the reversing valve 2, the first one-way sequence valve 3-1, the first one-way throttle valve 4, the first ball valve 6, the actuator 7, the second ball valve 10, the second one-way throttle valve 11, the second one-way sequence valve 3-2, and the second valve port of the reversing valve 2;

[0037] The first one-way valve and the second one-way valve are controlled to be forward-conducted or reversely locked by the reversing valve 2;

[0038] The opening size of the first sequence valve or the second sequence valve is adjusted by the load size of the actuator 7, thereby adjusting the operating speed of the actuator 7.

[0039] The high-speed heavy-load control circuit relies on the integration of two sets of one-way sequence valves to realize its important functions. Its main structure is as follows: Figures 2-3 As shown: It is an externally controlled and externally leaked one-way sequence valve, which is used together with a one-way valve and a sequence valve, and then the first one-way sequence valve 3-1 and the second one-way sequence valve 3-2 are integrated in the Figures 4 to 8 The valve block shown is convenient for the stacking installation of the system. In the hydraulic circuit, the oil in the actuator oil circuit can be locked so that the actuator will not slide down due to the deadweight of the load, which plays a locking role.

[0040] When the actuator needs to move, such as Figures 2-3 As shown: the reversing valve receives the reversing instruction and is in the working position shown in the figure. The oil passes through the reversing valve and then through the first check valve and the first check valve 4 of the balancing valve assembly to reach the actuator. At the same time, the pressure oil controls the second sequence valve to open through the internal oil circuit of the balancing valve assembly to connect the circuit and realize its movement; the reverse direction is consistent. When the reversing valve returns to the middle position, the first check valve and the second check valve in the first check valve 3-1 and the second check valve 3-2 in the balancing valve assembly are reversely locked, and the first sequence valve and the second sequence valve are opened without control oil, so the actuator is in a locked state. Since the first sequence valve and the second sequence valve themselves have different structures from the two-way hydraulic lock, a certain back pressure is generally established in the working circuit during operation, so that the main work of the hydraulic cylinder or the motor will not generate negative pressure due to the overspeed sliding due to the dead weight, so there will be no impact and vibration like the two-way hydraulic lock.

[0041] Furthermore, the first speed regulation of the actuator 7 is performed through the first one-way throttle valve 4 and the second one-way throttle valve 11 .

[0042] Furthermore, when the reversing valve 2 is in the middle position, the first one-way valve and the second one-way valve are reversely locked; when the reversing valve 2 is in the forward position, the first one-way valve is turned on; when the reversing valve 2 is in the reverse position, the second one-way valve is turned on.

[0043] Furthermore, a pressure measuring port 5 is provided between the first one-way valve and the first ball valve 6 , and between the second one-way valve and the second ball valve 10 .

[0044] Furthermore, the first valve port of the reversing valve 2 is connected to the first one-way valve; and the second valve port of the reversing valve 2 is connected to the second one-way valve.

[0045] Furthermore, it includes a control circuit of a high-speed heavy-load actuator 7 .

[0046] Furthermore, the actuator 7 includes a first chamber and a second chamber.

[0047] Specific working process:

[0048] First, when the actuator 7 needs to be operated, the reversing valve 2 is adjusted to be in the forward position or the reverse position; the first one-way throttle valve 4 and the second one-way throttle valve 11 are adjusted to adjust the operating speed of the actuator 7 for the first time.

[0049] Secondly, when the reversing valve 2 is in the forward position, the first one-way valve and the second one-way valve are opened; the pressure oil in the power station 1 passes through the first valve port of the reversing valve 2, the first one-way sequence valve 3-1, the first one-way throttle valve 4, the first ball valve 6, the actuator 7, the second ball valve 10, the second one-way throttle valve 11, the second one-way sequence valve 3-2, the second valve port of the reversing valve 2, and finally enters the oil tank 9.

[0050] When the reversing valve 2 is in the reverse position, the pressure oil in the power station 1 passes through the second valve port of the reversing valve 2, the second one-way sequence valve 3-2, the second one-way throttle valve 11, the second ball valve 10, the actuator 7, the first ball valve 6, the first one-way throttle valve 4, the first one-way sequence valve 3-1, the first valve port of the reversing valve 2, and finally enters the oil tank 9.

[0051] Finally, when the actuator 7 needs to stop running, the reversing valve 2 is adjusted to the middle position, so that the first one-way valve and the second one-way valve are reversely locked, and the pressure oil cannot pass through.

[0052] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0053] It should be understood that the present invention is not limited to the above-described contents, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A control circuit for a high-speed and heavy-load actuator, characterized in that: The balancing valve assembly comprises a first one-way sequence valve (3-1) and a second one-way sequence valve (3-2), wherein the first one-way sequence valve (3-1) comprises a first one-way valve and a first sequence valve, and the second one-way sequence valve (3-2) comprises a second one-way valve and a second sequence valve; The balancing valve assembly is provided with a first control oil circuit and a second control oil circuit; the two ends of the first control oil circuit are connected to the first valve port of the reversing valve (2) and the second sequence valve, and the two ends of the second control oil circuit are connected to the second valve port of the reversing valve (2) and the first sequence valve; The power station (1) is connected in sequence to a first valve port of the reversing valve (2), a first one-way sequence valve (3-1), a first one-way throttle valve (4), a first ball valve (6), an actuator (7), a second ball valve (10), a second one-way throttle valve (11), a second one-way sequence valve (3-2), and a second valve port of the reversing valve (2); The reversing valve (2) controls the forward conduction or reverse locking of the first one-way valve and the second one-way valve.

2. The control circuit of a high-speed and heavy-load actuator according to claim 1, characterized in that: The opening size of the first sequence valve or the second sequence valve is adjusted by the load size of the actuator (7), thereby adjusting the operating speed of the actuator (7).

3. The control circuit of a high-speed heavy-load actuator according to claim 1, characterized in that: The first one-way throttle valve (4) and the second one-way throttle valve (11) are used to adjust the speed of the actuator (7) for the first time.

4. The control circuit of a high-speed and heavy-load actuator according to claim 1, characterized in that: When the reversing valve (2) is in the middle position, the first one-way valve and the second one-way valve are reversely locked; when the reversing valve (2) is in the forward position, the first one-way valve is open; when the reversing valve (2) is in the reverse position, the second one-way valve is open.

5. The control circuit of a high-speed heavy-load actuator according to claim 1, characterized in that: A pressure measuring port (5) is provided between the first one-way valve and the first ball valve (6), and between the second one-way valve and the second ball valve (10).

6. The control circuit of a high-speed and heavy-load actuator according to claim 1, characterized in that: The first valve port of the reversing valve (2) is connected to the first one-way valve; the second valve port of the reversing valve (2) is connected to the second one-way valve.

7. The control circuit of a high-speed and heavy-load actuator according to claim 1, characterized in that: The actuator (7) comprises a first chamber and a second chamber.

8. A control system for a high-speed and heavy-load actuator, characterized in that: It comprises a control circuit of a high-speed and heavy-load actuator as claimed in any one of claims 1 to 7.

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