Control valve for hydraulic grab bucket equipment

Abstract

The utility model belongs to the technical field of hydraulic control valves, and particularly relates to a control valve for hydraulic grab bucket equipment, which comprises a control valve body, a first overflow valve is in threaded connection with the front surface of the control valve body, a cover plate component is arranged on the surface of the end of the first overflow valve, and a second hydraulic control one-way valve is mounted on the upper surface of the cover plate component. The second hydraulic control one-way valves are symmetrically distributed on the upper surface of the cover plate assembly, first dampers are installed on the second hydraulic control one-way valves, the surface of the top of the first overflow valve is in threaded connection with a third hydraulic control one-way valve, the top of the third hydraulic control one-way valve exceeds the top of the control valve body, and a throttling valve is arranged on one side of the third hydraulic control one-way valve. The control valve group on the novel hydraulic grab crane equipment has the characteristics of wide application range, capability of working in various severe environments, small size, light weight, compact and reasonable layout, low manufacturing cost, high safety and the like, and is more competitive when working in complex severe environments.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control valve technology, specifically a control valve used in hydraulic grab equipment. Background Technology

[0002] Hydraulic grab cranes replace the connecting slings and hooks of traditional cranes with hydraulic grabs. Hydraulic grab cranes are classified into bridge grab cranes, gantry grab cranes, and articulated grab cranes, with grabs available in two-, four-, and six-lobed configurations. They are mainly used for material grabbing and transfer in cement plants, power plants, ports, and waste treatment plants. As an automated material handling machine, the grabbing and unloading actions are controlled by the operator in the cab, eliminating the need for auxiliary personnel. This avoids heavy manual labor, saves working time, and significantly improves loading and unloading efficiency and safety. The valve assembly, while fulfilling the grab's opening and closing functions, features a clever structural design that also ensures the oil tank's seal under high-frequency, tilting conditions. Within a minimal space, it maximizes the fulfillment of operational requirements, making it more competitive in the market.

[0003] The control valves on existing hydraulic grabs are not stable when grabbing and unloading materials under heavy-duty conditions. The grabbing pressure is unstable, which can easily damage the goods or cause the gripping force to be too loose during use. The goods may fall off during the grabbing and transportation process. As a result, the hydraulic grab crane cannot meet the grabbing requirements of different materials when applied to different working conditions. In order to solve the above problems, this application proposes a control valve for hydraulic grab equipment. Utility Model Content

[0004] (I) Purpose of the utility model

[0005] To address the technical problems existing in the background art, this utility model proposes a control valve for hydraulic grab bucket equipment. The control valve assembly on the hydraulic grab bucket equipment is a crucial component for efficiently controlling hydraulic pressure, and is vital to the equipment's performance and service life. The control valve employs a high-flow two-way valve, a one-way valve, and a hydraulically controlled one-way valve, solving the problem of smoothly grabbing and unloading materials under heavy-tonnage conditions. Hydraulic grab bucket cranes are used in different working conditions and grab different materials, thus requiring varying grabbing forces. The relief valve flexibly sets the pressure according to different working conditions, enabling a single device to adapt to multiple different working conditions, thereby solving the problems mentioned in the background art.

[0006] (2) Technical solution

[0007] To solve the above technical problems, this utility model provides a control valve for a hydraulic grab bucket, including a control valve body. A first relief valve is threadedly connected to the front surface of the control valve body. A cover plate assembly is provided on the end surface of the first relief valve. A second hydraulic control check valve is installed on the upper surface of the cover plate assembly. The second hydraulic control check valves are symmetrically distributed on the upper surface of the cover plate assembly. A first damper is installed on each of the second hydraulic control check valves.

[0008] The top surface of the No. 1 overflow valve is threadedly connected to the No. 3 hydraulic control check valve, and the top of the No. 3 hydraulic control check valve extends beyond the top of the control valve body;

[0009] A throttle valve is provided on one side of the No. 3 hydraulic control check valve.

[0010] Preferably, the upper surface of the control valve body has a mounting hole, the throttle valve is threadedly installed in the mounting hole, and the throttle valve has a recessed structure.

[0011] Preferably, a shuttle valve is provided on one side of the first overflow valve, and a second overflow valve is provided on one side of the shuttle valve.

[0012] Preferably, a two-way valve is provided on the other side of the first overflow valve, and the first overflow valve is located between the two-way valve and the shuttle valve.

[0013] Preferably, a hydraulic check valve is provided on the side surface of the control valve body away from the cover plate assembly, and the hydraulic check valve is symmetrically distributed.

[0014] Preferably, the control valve body has a No. 3 overflow valve on its back surface.

[0015] Preferably, the outer wall surface of the cover plate assembly is provided with a second damper, which is distributed at equal intervals, and there are multiple sets of the second dampers.

[0016] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0017] 1. In this utility model, the control valve group on the hydraulic grab bucket equipment is an important component for efficient control of hydraulic pressure, which is crucial to the performance and service life of the equipment. The control valve adopts a high-flow two-way valve, a one-way valve, and a hydraulically controlled one-way valve, which solves the problem of stable grabbing and unloading of materials under heavy-tonnage conditions.

[0018] 2. This utility model describes a hydraulic grab crane that is applied to different working conditions and grabs different materials, thus requiring different grabbing forces. The overflow valve can flexibly set the pressure according to different working conditions, realizing the market demand for one device to adapt to a variety of different working conditions. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall structure of a control valve for a hydraulic grab bucket device according to the present invention;

[0020] Figure 2 This is a top view schematic diagram of a control valve for use on a hydraulic grab bucket equipment according to the present invention;

[0021] Figure 3 This is a schematic diagram of the left side of a control valve for a hydraulic grab bucket device according to the present invention.

[0022] Figure 4 This is a right-side structural schematic diagram of a control valve for a hydraulic grab bucket device according to the present invention;

[0023] Figure 5 This is a front view schematic diagram of a control valve for use on a hydraulic grab bucket equipment according to the present invention;

[0024] Figure 6 This is a rear view schematic diagram of a control valve for use on a hydraulic grab bucket equipment according to the present invention;

[0025] Figure 7 This is a schematic diagram of the flow channel structure of a control valve used in a hydraulic grab bucket equipment according to the present invention.

[0026] Figure label:

[0027] 1. Relief valve No. 1; 2. Cover plate assembly; 3. Two-way valve; 4. Relief valve No. 2; 5. Relief valve No. 3; 6. Shuttle valve; 7. Hydraulic control check valve No. 1; 8. Hydraulic control check valve No. 2; 9. Hydraulic control check valve No. 3; 10. Throttle valve; 11. Damper No. 1; 12. Damper No. 2. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0029] like Figure 1-4 As shown, the present invention proposes a control valve for a hydraulic grab bucket device, including a control valve body. A first relief valve 1 is threadedly connected to the front surface of the control valve body. A cover plate assembly 2 is provided on the end surface of the first relief valve 1. A second hydraulic control check valve 8 is installed on the upper surface of the cover plate assembly 2. The second hydraulic control check valve 8 is symmetrically distributed on the upper surface of the cover plate assembly 2. A first damper 11 is installed on each of the second hydraulic control check valve 8.

[0030] The top surface of the first overflow valve 1 is threadedly connected to the third hydraulic control check valve 9, and the top of the third hydraulic control check valve 9 extends beyond the top of the control valve body;

[0031] A throttle valve 10 is provided on one side of the No. 3 hydraulic control check valve 9. An installation hole is provided on the upper surface of the control valve body. The throttle valve 10 is threadedly installed in the installation hole and has a sinking structure.

[0032] In this embodiment, as Figure 5 As shown, a shuttle valve 6 is provided on one side of the first overflow valve 1, a second overflow valve 4 is provided on one side of the shuttle valve 6, and a two-way valve 3 is provided on the other side of the first overflow valve 1. The first overflow valve 1 is located between the two-way valve 3 and the shuttle valve 6.

[0033] In this embodiment, as Figure 3 As shown, a first hydraulic check valve 7 is provided on the side surface of the control valve body away from the cover plate assembly 2, and the first hydraulic check valve 7 is symmetrically distributed.

[0034] In this embodiment, as Figure 6 As shown, the control valve body has a No. 3 overflow valve 5 on its back surface.

[0035] In this embodiment, as Figure 4 As shown, the outer wall surface of the cover plate assembly 2 is provided with a second damper 12, which is distributed at equal intervals and there are multiple sets of the second damper 12.

[0036] The working principle and usage process of this utility model: The control valve group on the hydraulic grab crane equipment consists of an overflow valve 1, a cover plate assembly 2, a two-way valve 3, an overflow valve 4, an overflow valve 5, a shuttle valve 6, a check valve 7, a hydraulically controlled check valve 8, a hydraulically controlled check valve 9, a throttle valve 10, a first damper 11, and a second damper 12. The maximum working flow rate is 120L / min, controlling the six-lobed grab bucket. The cover plate assembly controls the opening and closing of the two-way valve. When the solenoid valve on the cover plate assembly is energized, high-pressure oil is supplied to port D, the hydraulic grab bucket opens quickly and normally, and when the pressure reaches the set value, the system returns to the standby state, exhibiting good energy-saving effect. During the grabbing operation, high-pressure oil is supplied through port D. The hydraulic grab bucket smoothly grabs materials under the action of throttle valve 10, and the pressure is maintained at the set value to prevent excessive grabbing force from damaging the materials. Relief valve 1 mainly limits system pressure to ensure that subsequent actions do not pose a safety hazard. High-pressure oil is supplied through port D, and the solenoid valve in cover plate assembly 2 closes the pilot control of two-way valve 3.1. The oil flows through two-way valve 3.1 to check valve 7.1 and enters one end of the grab bucket's cylinder. The other end of the cylinder returns to the oil tank through port C via hydraulic directional valve 9, and the grab bucket opens. Relief valve 4 provides pressure protection when the grab bucket opens. High-pressure oil is supplied through port E, and the solenoid valve in cover plate assembly 2 closes the pilot control of two-way valve 3.2. The oil flows through two-way valve 3.2 to check valve 7.2 and enters one side of the grab bucket's cylinder. The other side of the cylinder returns to the oil tank through hydraulic directional valve 8 and throttle valve 10, and the grab bucket closes, grabbing the materials. Relief valve 5 provides pressure limitation when the grab bucket closes.

[0037] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims or their equivalents.

Claims

1. A control valve for a hydraulic grab bucket device, comprising a control valve body, characterized in that, The front surface of the control valve body is threadedly connected to a first overflow valve (1). The end surface of the first overflow valve (1) is provided with a cover plate assembly (2). The upper surface of the cover plate assembly (2) is equipped with a second hydraulic control check valve (8). The second hydraulic control check valve (8) is symmetrically distributed on the upper surface of the cover plate assembly (2). Each of the second hydraulic control check valves (8) is equipped with a first damper (11). The top surface of the first overflow valve (1) is threaded with a third hydraulic control check valve (9), and the top of the third hydraulic control check valve (9) extends beyond the top of the control valve body; A throttle valve (10) is provided on one side of the No. 3 hydraulic control check valve (9).

2. A control valve for a hydraulic grab bucket according to claim 1, characterized in that, The upper surface of the control valve body is provided with a mounting hole, and the throttle valve (10) is threadedly installed in the mounting hole, and the throttle valve (10) is a sinking structure.

3. A control valve for a hydraulic grab bucket according to claim 2, characterized in that, A shuttle valve (6) is provided on one side of the first overflow valve (1), and a second overflow valve (4) is provided on one side of the shuttle valve (6).

4. A control valve for a hydraulic grab bucket according to claim 3, characterized in that, The first overflow valve (1) is provided with a two-way valve (3) on the other side, and the first overflow valve (1) is located between the two-way valve (3) and the shuttle valve (6).

5. A control valve for a hydraulic grab bucket according to claim 4, characterized in that, A hydraulic check valve (7) is provided on the side surface of the control valve body away from the cover plate assembly (2), and the hydraulic check valve (7) is symmetrically distributed.

6. A control valve for a hydraulic grab bucket according to claim 5, characterized in that, The control valve body has a No. 3 overflow valve (5) on its back surface.

7. A control valve for a hydraulic grab bucket according to claim 6, characterized in that, The outer wall surface of the cover plate assembly (2) is provided with a second damper (12), which is distributed in an equidistant manner, and there are multiple sets of the second damper (12).

Images