Quick release control valve, winch system and dynamic compactor

Abstract

The invention discloses a quick release control valve, a winch system and a dynamic compactor, and relates to the technical field of hoisting equipment. The quick release control valve comprises a proportional pressure reducing valve, wherein a working oil port of the proportional pressure reducing valve is connected with a brake working oil port of the winch; a working oil port of the electromagnetic directional valve is connected with a quick release working oil port of the winch; an oil inlet of the proportional pressure reducing valve is connected with an oil inlet of the electromagnetic directional valve to form an oil inlet of the quick release control valve; and an oil return port of the proportional pressure reducing valve is connected with an oil return port of the electromagnetic directional valve to form an oil return port of the quick release control valve. The quick release control valve is simple in structural form, the cost is saved, and the on-way loss of an oil path in the valve body is reduced; the valve groups are reduced, the oil temperature influence is reduced, and the response efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting equipment, and in particular relates to a quick-release control valve, a winch system and a dynamic tamping machine. Background Art

[0002] Due to the limitations of traditional hydraulic systems and operational safety concerns, conventional cranes generally have slow hook lowering speeds, significantly limiting crane efficiency. With the development of the engineering manufacturing industry, current crane equipment often uses complex quick-release control valves to control the winch to achieve rapid lowering. This implementation is complex, has a high failure rate, and exhibits slow response, making it difficult to meet the demands of demanding work environments. For manufacturers, complex control systems also translate to higher costs. To continuously meet market demand and drive positive growth for manufacturers, it is imperative to develop a simple, safe, efficient, and high-quality hydraulic system for quick-lowering the winch (hereinafter referred to as quick-release).

[0003] The main application scenarios for winch quick release are dynamic compaction and impact grabbing. For example, dynamic compaction machines typically have two modes: dynamic compaction and single-draw. In dynamic compaction, the rammer is manually raised to a predetermined height, automatically released, and then strikes the ground with free fall. The rammer hoist (commonly known as a decoupler) is then quickly released onto the rammer, connected, and the next cycle begins. In single-draw, the wire rope and rammer are connected via a chain. After the rammer is raised to a predetermined height, the rammer, carrying the wire rope, is quickly released and strikes the ground. Clearly, regardless of the mode, the efficiency of quick release activation and braking is crucial to overall machine efficiency and safety. The current system's technical shortcomings lie in its complex structure and control principles. Any action requires multiple valves to respond, resulting in significant pressure loss and slow response. Furthermore, the multi-valve group is significantly affected by oil temperature. The rammer quick release process is extremely brief, and the valve group's response time significantly affects braking distance, making control difficult and impacting product operability. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: how to simplify the structure of the quick-release control valve, solve the problems of slow response, large pressure loss and poor controllability of the quick-release winch operation, and improve the operating efficiency of the quick-release winch equipment.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] In a first aspect, the present invention provides a quick-release control valve, comprising:

[0007] A proportional pressure reducing valve, wherein the working oil port of the proportional pressure reducing valve is connected to the brake working oil port of the winch;

[0008] An electromagnetic reversing valve, wherein the working oil port of the electromagnetic reversing valve is connected to the quick-release working oil port of the winch;

[0009] The oil inlet of the proportional pressure reducing valve and the oil inlet of the electromagnetic reversing valve are connected to form the oil inlet of the quick release control valve;

[0010] The oil return port of the proportional pressure reducing valve and the oil return port of the electromagnetic reversing valve are connected to form the oil return port of the quick release control valve.

[0011] A plurality of oil filter screens are arranged on the connecting pipeline between the proportional pressure reducing valve and the electromagnetic reversing valve.

[0012] The quick release control valve comprises at least a first pressure measuring port and a second pressure measuring port;

[0013] The first pressure measuring port is connected to the working oil port of the proportional pressure reducing valve;

[0014] The second pressure measuring port is connected to the working oil port of the electromagnetic reversing valve.

[0015] The oil inlet of the proportional pressure reducing valve, the oil return port of the proportional pressure reducing valve, the oil inlet of the electromagnetic reversing valve and the oil return port of the electromagnetic reversing valve are connected to the same oil source.

[0016] When the electromagnetic reversing valve is energized, the oil flows through the electromagnetic reversing valve to the quick-release working oil port of the winch, and is used to build pressure at the quick-release working oil port;

[0017] When the proportional pressure reducing valve is energized, the oil flows through the proportional pressure reducing valve to the brake working oil port of the winch, and is used to build pressure in the brake working oil port.

[0018] In a second aspect, the present invention provides a hoisting system comprising:

[0019] The quick-release control valve mentioned above;

[0020] a quick-release switching valve connected to the oil inlet of the quick-release control valve and used to control the quick-release control valve to enter a quick-release mode;

[0021] an accumulator connected to the oil inlet of the quick-release control valve and used for quickly filling the system with fluid in the quick-release mode;

[0022] winch drum;

[0023] The winch clutch is connected to the winch drum and transmits torque to the winch drum. Its quick release chamber is connected to the second oil port of the quick release control valve, and its brake chamber is connected to the first oil port of the quick release control valve; wherein, the first oil port is the working oil port of the proportional pressure reducing valve, and the second oil port is the working oil port of the electromagnetic reversing valve.

[0024] When the pressure difference between the quick release chamber oil port and the brake chamber oil port is greater than the preset opening pressure, the winch clutch begins to open and the winch drum is disengaged from the reducer;

[0025] When the pressure difference between the quick release chamber oil port and the brake chamber oil port is less than the preset opening pressure, the hoisting clutch begins to close. When the pressure difference is zero, the hoisting clutch and the reducer are fully combined.

[0026] When the quick-release switching valve is energized, the quick-release oil path builds up oil pressure, and the system enters quick-release mode;

[0027] When the quick release switching valve loses power, the system enters the normal mode, and the quick release control valve does not respond.

[0028] In a third aspect, the present invention provides a dynamic compaction machine comprising the above-mentioned winch system.

[0029] When the dynamic ramming machine is working, the winch is controlled to lift the target object, the quick-release switching valve is energized, the electromagnetic reversing valve is de-energized, the proportional pressure reducing valve has no current input, the oil inlet of the quick-release control valve reaches the preset pressure, and after the winch reaches the target height, the target object is separated from the unhooker, the electromagnetic reversing valve is energized, and the quick-release chamber oil port builds pressure. When the pressure difference between the quick-release chamber oil port and the brake chamber oil port is greater than the preset winch clutch opening pressure, the winch clutch opens, and the unhooker connects to the wire rope and starts to lower. When the preset height is reached, the proportional pressure reducing valve is energized, and the brake chamber oil port starts to build pressure. When the pressure difference between the quick-release chamber oil port and the brake chamber oil port is less than the preset winch clutch opening pressure, the winch clutch starts to close, and the dynamic ramming machine gradually brakes to a stop.

[0030] Beneficial effects of the present invention: The quick-release control valve of the present invention has a simple structure and is composed of only an electromagnetic reversing valve and a proportional pressure reducing valve. Compared with the traditional quick-release control structure, the valve group is reduced, the structural complexity is greatly reduced, and the oil loss along the valve body is reduced; the proportional pressure reducing valve is directly connected to the quick-release brake oil circuit, and the electromagnetic reversing valve is connected to the clutch oil circuit. The two use a unified oil source. When performing winch quick release and brake control, it can directly reach the execution unit through only one control valve, thereby achieving a significant reduction in pressure loss. The reduction in valve groups also reduces the impact of oil temperature and improves response efficiency; at the same time, the structure is simple and the production cost is greatly reduced. The quick-release control valve of the present invention can be used not only for wet quick-release winches, but also for traditional clamp-type quick-release winches. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of the quick release control valve of the present invention;

[0032] Figure 2 This is a structural diagram of a hoisting system according to embodiment 2 of the present invention;

[0033] Figure 3 This is a structural diagram of a hoisting system according to embodiment 3 of the present invention;

[0034] Figure 4 Schematic diagram of the dynamic compaction machine according to embodiment 4 of the present invention when operating in dynamic compaction mode;

[0035] Figure 5 This is a schematic diagram of a dynamic compaction machine according to Example 4 of the present invention operating in a single extraction mode;

[0036] In the figure: 1-quick release control valve; 2-accumulator; 3-quick release switching valve; 4-wet winch; 5-clamp disc normally open winch; 6-unhooking device; 7-rammer; 11-electromagnetic reversing valve; 12-proportional pressure reducing valve; 13-oil line filter. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0038] Example 1

[0039] refer to Figure 1 As shown, a quick release control valve includes a solenoid reversing valve 11 and a proportional pressure reducing valve 12.

[0040] The proportional pressure reducing valve 12 is connected to the quick release brake oil circuit, and its working oil port A is connected to the brake chamber oil port K of the winch clutch (i.e. the brake working oil port of the winch).

[0041] The electromagnetic reversing valve 11 is connected to the clutch oil circuit, and its working oil port B is connected to the quick release chamber oil port P of the winch clutch (i.e. the quick release working oil port of the winch).

[0042] The oil inlet of the proportional pressure reducing valve 12 and the electromagnetic reversing valve 11 are connected to form the oil inlet P of the quick release control valve 1. A plurality of oil filters 13 are provided on the connecting pipeline between the proportional pressure reducing valve 12 and the electromagnetic reversing valve 11;

[0043] The oil return port of the proportional pressure reducing valve 13 and the solenoid reversing valve 12 are connected to form the oil return port T of the quick release control valve.

[0044] The quick release control valve 1 includes at least a first pressure measuring port MA and a second pressure measuring port MB. The first pressure measuring port MA is connected to the working oil port A of the proportional pressure reducing valve; the second pressure measuring port MB is connected to the working oil port B of the electromagnetic reversing valve;

[0045] The oil inlet and oil return port of the proportional pressure reducing valve 12, the oil inlet and oil return port of the solenoid reversing valve 11 are connected to the same oil source. When the solenoid reversing valve 11 is energized, oil flows through the solenoid reversing valve 11 to the quick-release chamber oil port P of the winch clutch. The quick-release chamber oil port P rapidly builds pressure. When the pressure difference between the quick-release chamber oil port P and the brake chamber oil port K exceeds the preset opening pressure, the winch clutch begins to open, and the winch drum is disengaged from the reducer.

[0046] When the proportional pressure reducing valve 12 is energized, the oil flows through the proportional pressure reducing valve 12 to the brake chamber oil port K of the winch clutch, and the brake chamber oil port K begins to build pressure. When the pressure difference between the quick release chamber oil port and the brake chamber oil port is less than the preset opening pressure, the winch clutch begins to close; when the pressure difference is zero, the winch clutch and the reducer are fully combined.

[0047] Example 2

[0048] refer to Figure 2 As shown, a winch system includes a quick-release control valve 1, an accumulator 2, a quick-release switching valve 3, a winch drum and a winch clutch;

[0049] The quick-release control valve 1 includes a first oil port, a second oil port, a third oil port, and a fourth oil port. The first oil port A (the working oil port of the proportional pressure-reducing valve 12) is connected to the brake chamber oil port K, the second oil port B (the working oil port of the electromagnetic reversing valve 11) is connected to the quick-release chamber oil port P, the third oil port (the oil inlet of the electromagnetic reversing valve 11 and the proportional pressure-reducing valve 12) is the oil inlet of the opening control valve, connected to the accumulator 2 and the quick-release switching valve 3, and the fourth oil port (the oil return port of the electromagnetic reversing valve 11 and the proportional pressure-reducing valve 12) is the oil return port of the opening control valve 1, connected to the oil source;

[0050] The accumulator 2 is connected to the oil inlet of the quick-release control valve 1 and is used to quickly fill the system with fluid in the quick-release mode to improve the system pressure building efficiency;

[0051] The quick-release switching valve 3 is connected to the oil inlet of the quick-release control valve 1 , and its oil inlet and oil return port are connected to the oil source, and is used to control the quick-release control valve to enter the quick-release mode.

[0052] winch drum;

[0053] The winch clutch is connected to the winch drum to transmit torque to the winch drum, wherein the quick release chamber is connected to the second oil port of the quick release control valve 1, and the brake chamber is connected to the first oil port of the quick release control valve 1.

[0054] In this embodiment, the winch is a wet winch.

[0055] When the quick-release switching valve 3 is energized, the quick-release oil path builds up oil pressure, and the system enters the quick-release mode; when the quick-release switching valve 3 loses power, the system enters the normal mode, and the quick-release control valve 1 does not respond.

[0056] During quick release, the electromagnetic reversing valve 11 is energized, and the quick release chamber oil port P quickly builds up pressure. When the pressure difference between the quick release chamber oil port P and the brake chamber oil port K is greater than the preset opening pressure, the winch clutch begins to open, and the winch drum is disengaged from the reducer, achieving quick release.

[0057] During braking, the proportional pressure reducing valve 12 is energized, and the brake chamber oil port K quickly builds pressure. When the pressure difference between the quick release chamber oil port P and the brake chamber oil port K is less than the preset opening pressure, the winch clutch begins to close. When the pressure difference is zero, the winch clutch and the reducer are fully combined to achieve braking.

[0058] Example 3

[0059] refer to Figure 3 As shown, a winch system includes a quick-release control valve 1, an accumulator 2, a quick-release switching valve 3, a winch drum, a winch clutch and a brake;

[0060] The quick-release control valve 1 includes a first oil port, a second oil port, a third oil port, and a fourth oil port. The first oil port A (the working oil port of the proportional pressure reducing valve 12) is connected to the brake working oil port, the second oil port B (the working oil port of the electromagnetic reversing valve 11) is connected to the winch clutch working oil port, the third oil port (the oil inlet of the electromagnetic reversing valve 11 and the proportional pressure reducing valve 12) is the oil inlet of the quick-release control valve, and is connected to the accumulator 2 and the quick-release switching valve 3. The fourth oil port (the oil return port of the electromagnetic reversing valve 11 and the proportional pressure reducing valve 12) is the oil return port of the quick-release control valve 1, and is connected to the oil source.

[0061] The accumulator 2 is connected to the oil inlet of the quick-release control valve 1 and is used to quickly fill the system with fluid in the quick-release mode to improve the system pressure building efficiency;

[0062] The quick-release switching valve 3 is connected to the oil inlet of the quick-release control valve 1 , and its oil inlet and oil return port are connected to the oil source, and is used to control the quick-release control valve to enter the quick-release mode.

[0063] winch drum;

[0064] The winch clutch is connected to the winch drum to transmit torque to the winch drum, and its working oil port is connected to the second oil port of the quick release control valve 1.

[0065] The brake is close to the winch drum and provides braking force. Its working oil port is connected to the first oil port of the quick-release control valve 1. It is closed when high pressure is applied, i.e. braking, and released when low pressure is applied, i.e. unloading.

[0066] The winch described in this embodiment is a clamp disc normally open type winch.

[0067] During quick release, the electromagnetic reversing valve 11 is energized, the winch clutch builds pressure and opens, the winch drum and the winch clutch are completely disengaged, and free rotation is achieved; during braking, the proportional pressure reducing valve 12 is energized, the brake builds pressure to make the caliper disc and the winch drum hold tightly, achieving braking.

[0068] Example 4

[0069] A dynamic compaction machine comprises a machine body, a steel wire rope, a decoupler 6, a handle, a foot pedal and the above-mentioned winch system.

[0070] The dynamic compaction machine described in this embodiment includes two working modes: dynamic compaction mode and single extraction mode.

[0071] In the dynamic tamping mode, active braking is generally performed by the foot pedal, while in the single-pumping mode, automatic braking is generally used.

[0072] refer to Figure 1-Figure 5 As shown, taking the wet winch as an example, the working process of the dynamic compaction machine of the present invention is described:

[0073] like Figure 4 As shown, the dynamic compaction mode is selected, the quick-release switching valve Y0 is energized, the electromagnetic reversing valve Y1 is de-energized, the proportional pressure reducing valve P1 has no current input, the P port of the quick-release control valve reaches the preset pressure, the operating conditions of the dynamic compaction machine are selected (including: arm length, ratio, etc.), the winch is operated to lift the rammer 7 to the target height H, the unhooker 6 is released, the heavy object falls freely to compact the ground, and then the quick-release control switch is turned on, the electromagnetic reversing valve Y1 is energized, and the P port of the winch clutch quickly builds pressure. When ∆p=PK>p1, ∆p is the pressure difference between the quick-release chamber P port and the brake chamber K port, and p1 is the preset winch clutch opening pressure (which is the same as the winch clutch opening pressure). The winch clutch opens, the unhooker 6 connects to the wire rope and begins to lower rapidly. When it approaches the ground, the foot valve is stepped on, outputting current I1 to the proportional pressure reducing valve P1 (the current is proportional to the degree of pedaling of the foot valve). The brake chamber K port begins to build pressure. When ∆p=PK<p1, the winch clutch begins to close, achieving braking. When ∆p=0, the winch clutch and the reducer are fully engaged and in a normal state. When controlling the winch to lift, the electromagnetic reversing valve Y1 and the proportional pressure reducing valve P1 automatically lose power. When lifting stops, the quick-release switching valve Y0 automatically becomes energized, entering the next cycle.

[0074] like Figure 5As shown, the quick-release single-extraction mode is selected. The quick-release switching valve Y0 is energized, the solenoid reversing valve Y1 is de-energized, the proportional pressure-reducing valve P1 has no current input, and the quick-release control valve P port reaches the preset pressure. The single-extraction operation mode is selected, and the lifting target height H, the rammer weight t, and the brake height h are set. The winch is operated to lift, and the rammer 7 stops when it is close to leaving the ground. The operating handle is quickly set to zero, and the winch is then raised normally. When the winch reaches the target height H, the solenoid reversing valve Y1 is automatically energized, and the quick-release winch P port quickly builds pressure, rapidly lowering the rammer 7 and the wire rope. When the rammer 7 is detected to be at a height h from the zero position, the proportional pressure-reducing valve P1 is automatically energized I2, and the K port begins to build pressure to ensure that ∆p = PK < p1 when the rammer 7 lands, and braking begins. (The setting of the brake height h is related to the system response. If it is too large, the rammer 7 will brake in mid-air, affecting the rammering energy and posing a risk of overturning. If it is too small, the wire rope will be over-released and tangled, causing damage to the wire rope.) Then the winch is hoisted, the electromagnetic reversing valve Y1 and the proportional pressure reducing valve P1 are automatically de-energized, and the zero position is set again when the rammer 7 is close to leaving the ground, and the next cycle is entered.

[0075] During operation, the brake current I2 can be preset according to the rammer weight t, lifting height H, and chain length l to ensure that the product is suitable for different working conditions. In addition, by detecting the winch lowering speed, a smaller current I3 can be applied to the brake valve to control the winch quick release speed to achieve uniform lowering speed.

[0076] In summary, the quick-release control valve of the present invention has a simple structure and is composed of only one electromagnetic reversing valve and one proportional pressure-reducing valve. Compared with the traditional quick-release control structure, the valve group is reduced, the structural complexity is greatly reduced, and the oil loss along the valve body is reduced; the proportional pressure-reducing valve is directly connected to the quick-release brake oil circuit, and the electromagnetic reversing valve is connected to the clutch oil circuit. The two use a unified oil source. When performing winch quick release and brake control, it can directly reach the execution unit through only one control valve, thereby achieving a significant reduction in pressure loss. The reduction in valve groups also reduces the impact of oil temperature and improves response efficiency; at the same time, the structure is simple and the production cost is greatly reduced. The quick-release control valve of the present invention can be used not only for wet quick-release winches, but also for traditional clamp-disc quick-release winches.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A quick release control valve, characterized in that: include: A proportional pressure reducing valve, wherein the working oil port of the proportional pressure reducing valve is connected to the brake working oil port of the winch; An electromagnetic reversing valve, wherein the working oil port of the electromagnetic reversing valve is connected to the quick-release working oil port of the winch; The oil inlet of the proportional pressure reducing valve and the oil inlet of the electromagnetic reversing valve are connected to form the oil inlet of the quick release control valve; The oil return port of the proportional pressure reducing valve and the oil return port of the electromagnetic reversing valve are connected to form the oil return port of the quick release control valve.

2. A quick release control valve according to claim 1, characterized in that: A plurality of oil filter screens are arranged on the connecting pipeline between the proportional pressure reducing valve and the electromagnetic reversing valve.

3. The quick release control valve according to claim 1, characterized in that: The quick release control valve comprises at least a first pressure measuring port and a second pressure measuring port; The first pressure measuring port is connected to the working oil port of the proportional pressure reducing valve; The second pressure measuring port is connected to the working oil port of the electromagnetic reversing valve.

4. The quick release control valve according to claim 1, characterized in that: The oil inlet of the proportional pressure reducing valve, the oil return port of the proportional pressure reducing valve, the oil inlet of the electromagnetic reversing valve and the oil return port of the electromagnetic reversing valve are connected to the same oil source.

5. The quick release control valve according to claim 1, characterized in that: When the electromagnetic reversing valve is energized, the oil flows through the electromagnetic reversing valve to the quick-release working oil port of the winch, and is used to build pressure at the quick-release working oil port; When the proportional pressure reducing valve is energized, the oil flows through the proportional pressure reducing valve to the brake working oil port of the winch, and is used to build pressure in the brake working oil port.

6. A winch system, characterized in that: include: The quick-release control valve according to any one of claims 1 to 5; a quick-release switching valve connected to the oil inlet of the quick-release control valve and used to control the quick-release control valve to enter a quick-release mode; an accumulator connected to the oil inlet of the quick-release control valve and used for quickly filling the system with fluid in the quick-release mode; winch drum; The winch clutch is connected to the winch drum and transmits torque to the winch drum. Its quick release chamber is connected to the second oil port of the quick release control valve, and its brake chamber is connected to the first oil port of the quick release control valve; wherein, the first oil port is the working oil port of the proportional pressure reducing valve, and the second oil port is the working oil port of the electromagnetic reversing valve.

7. The hoisting system according to claim 6, characterized in that: When the pressure difference between the quick release chamber oil port and the brake chamber oil port is greater than the preset opening pressure, the winch clutch begins to open and the winch drum is disengaged from the reducer; When the pressure difference between the quick release chamber oil port and the brake chamber oil port is less than the preset opening pressure, the hoisting clutch begins to close. When the pressure difference is zero, the hoisting clutch and the reducer are fully combined.

8. The hoisting system according to claim 6, characterized in that: When the quick-release switching valve is energized, the quick-release oil path builds up oil pressure, and the system enters quick-release mode; When the quick release switching valve loses power, the system enters the normal mode, and the quick release control valve does not respond.

9. A dynamic compaction machine, characterized in that: Comprising the hoisting system according to any one of claims 6 to 8.

10. A dynamic compaction machine according to claim 9, characterized in that: When the dynamic ramming machine is working, the winch is controlled to lift the target object, the quick-release switching valve is energized, the electromagnetic reversing valve is de-energized, the proportional pressure reducing valve has no current input, the oil inlet of the quick-release control valve reaches the preset pressure, and after the winch reaches the target height, the target object is separated from the unhooker, the electromagnetic reversing valve is energized, and the quick-release chamber oil port builds pressure. When the pressure difference between the quick-release chamber oil port and the brake chamber oil port is greater than the preset winch clutch opening pressure, the winch clutch opens, and the unhooker connects to the wire rope and starts to lower. When the preset height is reached, the proportional pressure reducing valve is energized, and the brake chamber oil port starts to build pressure. When the pressure difference between the quick-release chamber oil port and the brake chamber oil port is less than the preset winch clutch opening pressure, the winch clutch starts to close, and the dynamic ramming machine gradually brakes to a stop.

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