Large-air-passing-amount air cylinder reversing valve of grouting pump

Abstract

The invention provides a large-air-passing-amount air cylinder reversing valve of a grouting pump. A square-shaped valve element is arranged in a valve body to form an air inlet channel, two partition plates are arranged in the valve element to divide an inner cavity of the valve element into three independent ventilation cavities, and ventilation holes penetrating in the arrangement direction of the three ventilation cavities are formed in the valve element; the upper cover is of a groove-shaped structure covering the opening of the valve element in a buckled mode, the two switching pieces penetrate through the ventilation holes from outside to inside and then stretch into the two ventilation cavities in the two sides, and sealing plates are arranged on the switching pieces so as to seal the two sides of the ventilation cavities along with movement of the switching pieces. The reversing mechanism is simple in structure, reliable to use, simple in sealing assembly, large in air passing amount and capable of meeting the reversing requirement of a large engineering air cylinder.

Description

Technical Field

[0001] The invention belongs to the technical field of cylinder control, and in particular relates to a large-volume cylinder reversing valve for a grouting pump. Background Art

[0002] Directional valves are essential for controlling cylinder reversal. For large engineering cylinders, the commonly used two-position, four-way valves have limited airflow, resulting in slow cylinder movement and inability to meet engineering requirements. For example, equipment such as grouting pumps and dampers in coal mines requires high cylinder thrust, with cylinder diameters exceeding 300mm. Conventional two-position, four-way valves, due to their limited airflow, result in slow cylinder movement, impacting work efficiency.

[0003] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and the present invention provides a large-volume cylinder reversing valve for a grouting pump.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A grouting pump large air volume cylinder reversing valve, comprising: A valve body, wherein a U-shaped valve core is provided inside the valve body to form an air inlet passage, and an air inlet pipe corresponding to the air inlet passage is provided on the side of the valve body; two partitions are provided inside the valve core to divide the inner cavity of the valve core into three independent ventilation chambers, and a ventilation hole is provided on the valve core to pass through along the arrangement direction of the three ventilation chambers; An upper cover, the upper cover being a groove-shaped structure buckled over the valve core opening, a ventilation groove corresponding to the three ventilation cavities respectively provided inside the upper cover, and an air outlet pipe corresponding to the three ventilation grooves respectively provided on the side wall of the upper cover; Switching parts, wherein the two switching parts respectively pass through the ventilation hole from the outside to the inside and extend into the two ventilation cavities on both sides. The switching parts are provided with sealing plates to seal the two sides of the ventilation cavity respectively as the switching parts move; A linkage rod is provided between the two switching members so that the air inlet pipe forms a passage with the corresponding air outlet pipe through the ventilation cavity on one side, and the other two air outlet pipes form passages through the other two ventilation cavities.

[0006] Preferably, the switching member is cylindrical and is slidably sealed with the valve body; A driving member corresponding to the switching member is provided on the outer wall of the valve body.

[0007] Preferably, the side wall of the ventilation cavity corresponding to the ventilation hole is a flat surface, so that the sealing plate can seal the ventilation hole corresponding to the ventilation cavity by extrusion.

[0008] Preferably, the ventilation pipes corresponding to the two ventilation chambers on both sides are connected to the two air supply ports of the cylinder, and the ventilation pipe corresponding to the ventilation chamber in the middle is connected to the muffler.

[0009] Preferably, the two switching members and the linkage rod are integrally formed.

[0010] Preferably, one side of the valve body is detachably connected to a bottom plate, and the other side is provided with an opening corresponding to the inner cavity of the valve core.

[0011] Preferably, the diameter of the ventilation hole is larger than the outer diameter of the switching member; The diameter of the ventilation hole is smaller than the outer diameter of the sealing plate.

[0012] Beneficial effects: The reversing valve with large air flow rate provided by the present invention has a simple structure, reliable use, simple sealing components, and a large air flow rate of the reversing mechanism, which can meet the reversing needs of large-scale engineering cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings and the accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. Among them: Figure 1 A simplified structural diagram of a cylinder ventilation valve in a specific embodiment of the present invention; Figure 2 A longitudinal cross-sectional view of a cylinder ventilation valve according to a specific embodiment of the present invention; Figure 3 A transverse cross-sectional view of a cylinder ventilation valve according to a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the distribution of the ventilation chambers in a specific embodiment provided by the present invention; Figure 5 This is a schematic diagram of the control pipeline of the cylinder ventilation valve in the specific embodiment provided by the present invention.

[0014] In the figure: 1. Upper cover; 2. Driving part; 3. Valve body; 4. Inlet pipe; 5. Base plate; 6. Outlet pipe; 7. Sealing plate; 8. Switching part; 9. Inlet duct; 10. Linkage rod; 11. Valve core; 12. Engineering cylinder; 13. Manual reversing valve. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0016] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0017] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0018] like Figure 1-5 As shown, the present application provides a large-volume cylinder reversing valve for a grouting pump, which is used to control the cylinder of the thrust of a coal mine, specifically a valve body 3, an upper cover 1, a switching part 8 and a sealing plate 7. The valve body 3 is a main casting machine or milling part. A mouth-shaped valve core 11 is provided inside the valve body 3, and an inner cavity that passes through the valve body 3 is provided in the middle of the valve core 11. A mouth-shaped air inlet 9 is formed between the valve core 11 and the inner wall of the valve body 3, thereby forming an annular air supply structure to ensure that the reversing valve can be uninterruptedly supplied with air during the switching process of the valve body 3. In this embodiment, one side of the valve body 3 is connected to the bottom plate 5 in a detachable manner, and the bottom plate 5 is fixed to the open side of the valve body 3 by bolts, thereby sealing the air inlet 9, and an opening corresponding to the inner cavity of the valve core 11 is provided on the other side, and an air inlet pipe 4 corresponding to the air inlet 9 is provided on the side of the valve body 3, and the air inlet pipe 4 is correspondingly connected to the air source.

[0019] Two partitions are provided in the valve core 11, thereby dividing the inner cavity of the valve core 11 into three independent ventilation chambers, of which the two ventilation chambers on both sides correspond to the connected air inlet 9, and the upper cover 1 is a groove-shaped structure that buckles the cover at the opening of the inner cavity of the valve core 11, which is detachably fixed by bolts, and a sealing ring is provided between the two. Ventilation grooves corresponding to the three ventilation chambers are provided inside the upper cover 1, and the ventilation grooves correspond to the ventilation chambers one by one, so that the valve core 11 and the upper cover 1 are connected, and the side wall of the upper cover 1 is provided with an air outlet pipe 6 corresponding to the three ventilation grooves. A switching piece 8 is provided in the air cavity. The two switching pieces 8 pass through the ventilation holes from the outside to the inside and extend into the two ventilation cavities on both sides. A sealing plate 7 is provided on the switching piece 8 to seal the two sides of the ventilation cavity respectively as the switching piece 8 moves. The ventilation cavities on both sides are alternately connected to the middle ventilation cavity through the switching of the sealing plate 7. The ventilation pipes corresponding to the two ventilation cavities on both sides are correspondingly connected to the two air supply ports of the cylinder, so that the moving direction of the cylinder can be controlled. The ventilation pipe corresponding to the middle ventilation cavity is connected to the muffler, thereby reducing the noise caused by exhaust.

[0020] Furthermore, in order to ensure the accuracy of switching, a linkage rod 10 is provided between the two switching parts 8. Under the limitation of the linkage rod 10, it is ensured that when one of the ventilation chambers is sealed, the other ventilation chamber is opened, so that the intake pipe 4 forms a passage with the corresponding outlet pipe 6 through the ventilation chamber on one side, which serves as the cylinder intake path, and the other two outlet pipes 6 form passages through the other two ventilation chambers, which serve as the cylinder outlet paths.

[0021] In an optional embodiment, the switching member 8 is cylindrical, and a through hole corresponding to the switching member 8 is provided on the outside of the valve body 3, so that the switching member 8 and the valve body 3 are slidingly sealed, and a driving member 2 corresponding to the switching member 8 is provided on the outer wall of the valve body 3, and the driving member 2 is an electromagnetic push rod, a gas rod or a hydraulic rod.

[0022] The side wall of the ventilation cavity corresponding to the ventilation hole is a flat surface, so that the sealing can be maintained when the sealing plate 7 presses the side wall of the ventilation cavity. The spacing of the sealing plate 7 with each displacement of the switching member 8 is adapted to the inner cavity of the ventilation cavity. The sealing plate 7 is a metal circular plate with a flat side, or a rubber layer is attached to the surface of the sealing plate 7, so that the sealing plate 7 can seal the ventilation hole corresponding to the ventilation cavity by extrusion.

[0023] The two switching members 8 and the linkage rod 10 are integrally formed and formed by turning through the same shaft.

[0024] In an optional embodiment, the aperture of the ventilation hole is larger than the outer diameter of the switching member 8; the aperture of the ventilation hole is smaller than the outer diameter of the sealing plate 7, thereby ensuring that the ventilation cavity is sealed in the extrusion state and the ventilation cavity is connected in the non-extrusion state.

[0025] In this embodiment, the two driving members 2 are both gas rods, and the air inlet ends of the two gas rods are respectively connected to the two air ports of the manual reversing valve 13, thereby forming a linkage control.

[0026] In this implementation Figure 5 The middle ventilation chamber is divided into the first ventilation chamber, the second ventilation chamber and the third ventilation chamber from left to right. The air inlet of the reversing valve is connected to the main air source. The air outlet pipe 6 on the left corresponds to the air inlet A of the engineering cylinder 12 (bidirectional cylinder) of the grouting pump, and the air outlet pipe 6 on the right is connected to the air inlet B of the engineering cylinder 12.

[0027] The control air circuit is connected to the air inlet of the manual reversing valve 13, and the two air ports of the manual reversing valve 13 are connected to the two driving parts 2, thereby controlling the internal switching part 8 to move; for example, the manual reversing valve 13 controls the extension of the left driving part 2, driving the sealing plate 7 to move to the right, and the air source of the engineering cylinder 12 enters the first ventilation chamber from the air inlet 9, and then supplies air to the left side of the engineering cylinder 12 through the left air outlet pipe 6. The exhaust gas on the right side of the engineering cylinder 12 enters the third ventilation chamber through the right air outlet pipe 6. At this time, the third ventilation chamber and the second ventilation chamber are connected, and the exhaust gas is discharged from the middle outlet pipe, thereby pushing the large engineering cylinder 12 to move to the left.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A grouting pump large air volume cylinder reversing valve, characterized in that: include: A valve body, wherein a U-shaped valve core is provided inside the valve body to form an air inlet passage, and an air inlet pipe corresponding to the air inlet passage is provided on the side of the valve body; two partitions are provided inside the valve core to divide the inner cavity of the valve core into three independent ventilation chambers, and a ventilation hole is provided on the valve core to pass through along the arrangement direction of the three ventilation chambers; An upper cover, the upper cover being a groove-shaped structure buckled over the valve core opening, a ventilation groove corresponding to the three ventilation cavities respectively provided inside the upper cover, and an air outlet pipe corresponding to the three ventilation grooves respectively provided on the side wall of the upper cover; Switching parts, wherein the two switching parts respectively pass through the ventilation hole from the outside to the inside and extend into the two ventilation cavities on both sides. The switching parts are provided with sealing plates to seal the two sides of the ventilation cavity respectively as the switching parts move; A linkage rod is provided between the two switching members so that the air inlet pipe forms a passage with the corresponding air outlet pipe through the ventilation cavity on one side, and the other two air outlet pipes form passages through the other two ventilation cavities.

2. The large-volume cylinder reversing valve for a grouting pump according to claim 1 is characterized in that: The switching member is cylindrical and slides and seals with the valve body; A driving member corresponding to the switching member is provided on the outer wall of the valve body.

3. The large-volume cylinder reversing valve for a grouting pump according to claim 1 is characterized in that: The side wall of the ventilation cavity corresponding to the ventilation hole is a flat surface, so that the sealing plate can seal the ventilation hole corresponding to the ventilation cavity by extrusion.

4. The large-volume cylinder reversing valve for a grouting pump according to claim 1 is characterized in that: The ventilation pipes corresponding to the two ventilation chambers on both sides are connected to the two air supply ports of the cylinder, and the ventilation pipe corresponding to the ventilation chamber in the middle is connected to the muffler.

5. The large excess air volume cylinder reversing valve for a grouting pump according to claim 2 is characterized in that: The two switching members and the linkage rod are integrally formed.

6. The large-volume cylinder reversing valve for a grouting pump according to claim 1 is characterized in that: One side of the valve body is detachably connected to a bottom plate, and the other side is provided with an opening corresponding to the inner cavity of the valve core.

7. The large-volume cylinder reversing valve for a grouting pump according to claim 1 is characterized in that: The diameter of the ventilation hole is larger than the outer diameter of the switching element; The diameter of the ventilation hole is smaller than the outer diameter of the sealing plate.

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