Lubricating oil injection valve group

Abstract

A lubricating oil injection valve group, comprising: a closed cavity, which is sealed in a valve body by a component connected with the closed cavity; a piston connected with the closed cavity, which can extend into or retract from the closed cavity, and the piston and the valve body form a rod cavity and a rodless cavity; a solenoid valve connected with the rodless cavity, which is used to control the piston to extend into or retract from the closed cavity, to adjust the volume of the closed cavity, control the suction of lubricating oil into the closed cavity or the pumping of lubricating oil from the closed cavity. The lubricating oil injection valve group can supplement lubricating oil for each working mechanism during the operation of large machinery, and improve the service life.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control, and in particular to a lubricating oil injection valve assembly. Background Technology

[0002] Large drilling rigs such as down-the-hole drills are machines that operate under high intensity for extended periods. Many of these machines have bushings, bearings, and other metal structures that require lubrication to protect them and reduce mechanical wear and damage.

[0003] Therefore, a device is needed to replenish lubricating oil for large drilling rigs such as down-the-hole drills in order to extend their service life. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a lubricating oil injection valve assembly for replenishing lubricating oil in large drilling rigs such as down-the-hole drills, thereby improving their service life.

[0005] To solve the above-mentioned technical problems, this utility model provides a lubricating oil injection valve assembly, comprising: a sealed chamber, the sealed chamber being formed by a component connected to the sealed chamber and sealed within a valve body; a piston, connected to the sealed chamber, the piston being capable of extending into or retracting into the sealed chamber, the piston and the valve body forming a rod-side chamber and a rodless chamber; and a solenoid valve, connected to the rodless chamber, for controlling the piston to extend into or retract into the sealed chamber, thereby adjusting the volume of the sealed chamber and controlling the intake or pumping of lubricating oil into or out of the sealed chamber.

[0006] Optionally, it also includes: a first input port, wherein the solenoid valve includes an oil inlet, an oil outlet, and a drain port, the oil inlet of the solenoid valve is connected to the first input port, the oil outlet of the solenoid valve is connected to the rodless chamber, and the drain port of the solenoid valve is connected to the hydraulic oil tank, and the solenoid valve is used to control whether hydraulic oil enters the rodless chamber.

[0007] Optionally, it also includes: a first connection port; a first pipeline disposed between the first connection port and the first input port, the first connection port being connected to the rod chamber, and the hydraulic oil entering the rod chamber through the first pipeline.

[0008] Optionally, it also includes: a second inlet, which is connected to a lubricating oil tank; and a second pipeline disposed between the sealed cavity and the second inlet, through which the lubricating oil enters the sealed cavity.

[0009] Optionally, the component includes: a first check valve disposed on the second pipeline, the first check valve being used to control the lubricating oil to flow unidirectionally from the second inlet to the sealed cavity, the first check valve being connected to the sealed cavity.

[0010] Optionally, it also includes: an output port for outputting lubricating oil pumped from the sealed cavity; and a third pipeline disposed between the output port and the sealed cavity, through which the lubricating oil pumped from the sealed cavity flows to the output port.

[0011] Optionally, the component includes: a second check valve disposed on the third pipeline, the second check valve being used to control the lubricating oil pumped from the sealed chamber to flow unidirectionally from the sealed chamber to the output port, the second check valve being connected to the sealed chamber.

[0012] Optionally, it also includes: a fourth pipeline disposed between the rod chamber and the sealed chamber; the component further includes: a throttle valve disposed on the fourth pipeline, the throttle valve being used to control whether hydraulic oil enters the sealed chamber, the throttle valve being connected to the sealed chamber.

[0013] Optionally, it also includes: a damping assembly disposed on the fourth pipeline, the damping assembly being disposed between the throttle valve and the rod chamber.

[0014] Optionally, the piston's force-bearing area in the rodless chamber is greater than its force-bearing area in the rod chamber.

[0015] Compared with the prior art, the technical solution of this utility model embodiment has the following beneficial effects:

[0016] This invention relates to a lubricating oil injection valve assembly. By controlling the piston to extend or retract into the sealed chamber, the volume of the sealed chamber is adjusted, thereby controlling the intake or discharge of lubricating oil. This enables the replenishment of lubricating oil to various working mechanisms during the operation of large machinery, thus extending its service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the lubricating oil injection valve assembly according to an embodiment of this utility model;

[0018] Figures 2 to 4 This is a schematic diagram of the structure of the lubricating oil injection valve assembly according to an embodiment of the present invention. Detailed Implementation

[0019] To make the above-mentioned objectives, features and beneficial effects of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the lubricating oil injection valve assembly according to an embodiment of this utility model; Figures 2 to 4 This is a schematic diagram of the structure of the lubricating oil injection valve assembly according to an embodiment of the present invention.

[0021] Please refer to Figures 1 to 4 , Figure 1 The diagram illustrates the piping connections of each component of the lubricating oil injection valve assembly. Figure 2 This is a top view of the entire lubricating oil injection valve assembly. Figure 3 and Figure 4 It is along Figure 2 A schematic diagram of the cross-sectional structure along the FF1 direction. Figure 3 and Figure 4 The diagram illustrates the piston in different states.

[0022] The lubricating oil injection valve assembly includes:

[0023] A sealed cavity 1 is formed by sealing within the valve body 8 by a component connected to the sealed cavity 1.

[0024] Piston 3 is connected to the sealed cavity 1. Piston 3 can extend into or retract into the sealed cavity 1. Piston 3 and valve body 8 form a rod chamber 31 and a rodless chamber 32 piston.

[0025] Solenoid valve 2, connected to rodless chamber 32, is used to control the piston 3 to extend into or retract into sealed chamber 1, so as to adjust the volume of sealed chamber 1 and control the intake or pumping of lubricating oil into or out of sealed chamber 1.

[0026] The sealed cavity 1 is located inside the valve body 8, and several components are disposed inside the valve body and interconnected within the valve body.

[0027] The lubricating oil injection valve assembly adjusts the volume of the sealed chamber 1 by controlling the piston 3 to extend or retract into it, thereby controlling the intake or pumping of lubricating oil into or out of the sealed chamber 1. This allows for the replenishment of lubricating oil to various working mechanisms during the operation of large machinery, thus extending its service life.

[0028] In this embodiment, the rod chamber 31 is adjacent to the sealed chamber 1, and the rodless chamber 32 is away from the sealed chamber 1. The piston 3 extends into the sealed chamber 1, moving from the rodless chamber 32 towards the rod chamber 31; the piston 3 retracts into the sealed chamber 1, moving from the rod chamber 31 towards the rodless chamber 32. In this embodiment, the rod chamber 31 and the sealed chamber 1 are separate. When in the retracted state, the piston 3 can be completely retracted into the rod chamber 31, or a portion of the piston 3 may remain within the sealed chamber 1.

[0029] In this embodiment, the diameter of the rodless cavity 32 is larger than the diameter of the rod cavity 31, and the area of ​​the rodless cavity 32 is larger than the area of ​​the rod cavity 31. Therefore, the force-bearing area of ​​the piston 3 in the rodless cavity 32 is greater than that in the rod cavity 31. When hydraulic oil at the same pressure is injected into both the rodless cavity 32 and the rod cavity 31, the piston 3 extends into the sealed cavity 1.

[0030] In this embodiment, the solenoid valve 2 includes an oil inlet, an oil outlet, and a drain port. The lubricating oil injection valve assembly further includes a first input port A. The oil inlet of the solenoid valve 2 is connected to the first input port A. The oil outlet of the solenoid valve 2 is connected to the rodless chamber 32. The drain port of the solenoid valve 2 is connected to the hydraulic oil tank. The solenoid valve 2 is used to control whether hydraulic oil enters the rodless chamber 32.

[0031] When solenoid valve 2 is energized, its working position is switched, and hydraulic oil enters rodless chamber 32 through solenoid valve 2.

[0032] In this embodiment, the lubricating oil injection valve assembly further includes: a first connection port B; and a first pipeline AB disposed between the first connection port B and the first input port A, wherein the first connection port B is connected to the rod chamber 31, and the hydraulic oil enters the rod chamber 31 through the first pipeline AB.

[0033] When the solenoid valve 2 is not energized, the hydraulic oil enters the rod chamber 31 through the first pipeline AB; when the solenoid valve 2 is energized, the hydraulic oil enters the rod chamber 31 through the first pipeline AB, and the hydraulic oil also enters the rodless chamber 32 through the solenoid valve 2.

[0034] Regardless of whether the solenoid valve 2 is energized or not, the hydraulic oil continues to enter the rod chamber 31 through the first pipeline AB.

[0035] When the solenoid valve 2 is not energized, the hydraulic oil enters the rod chamber 31 through the first pipeline AB. At this time, the hydraulic oil entering the rod chamber 31 pushes the piston 3 to retract towards the rodless chamber 32, so that the piston 3 is in the retracted state.

[0036] When solenoid valve 2 is energized, its operating position changes, and the hydraulic oil also enters the rodless chamber 32 through solenoid valve 2. At this time, the hydraulic oil simultaneously enters both the rod chamber 31 and the rodless chamber 32, and the pressure in the rod chamber 31 and the rodless chamber 32 is the same. Since the area of ​​the rodless chamber 32 is larger than that of the rod chamber 31, the pressure of the hydraulic oil entering the rodless chamber 32 (pressure = pressure * area) is greater. Therefore, the hydraulic oil in the rodless chamber 32 can push the piston 3 to extend towards the rod chamber 31, so that the piston 3 is in the extended state of extending into the sealed chamber 1.

[0037] Please refer to Figure 3 and Figure 4 , Figure 3 This illustrates the extended state of the piston 3. Figure 3 The piston 3 extends into the sealed cavity 1, and the sealed cavity 1 has the smallest volume. Figure 4This illustrates the retracted state of the piston 3. Figure 4 The piston 3 retracts into the rodless chamber 32, and the volume of the sealed chamber 1 is at its maximum.

[0038] The sealed cavity 1 is formed by a component connected to it and sealed within the valve body. Since the piston 3 can extend into or retract into the sealed cavity 1, the sealed volume of the sealed cavity 1 is larger when the piston 3 is retracted and smaller when the piston 3 is extended. When the piston 3 switches from the extended to the retracted state, the volume of the sealed cavity 1 increases, and the pressure inside the sealed cavity 1 decreases.

[0039] In this embodiment, the lubricating oil injection valve assembly further includes: a second inlet C, which is connected to the lubricating oil tank; and a second pipeline CD disposed between the piston 3 and the second inlet C, through which the lubricating oil enters the sealed cavity 1.

[0040] The lubricating oil injection valve assembly is located at the bottom of the lubricating oil tank, so that the lubricating oil can easily enter the lubricating oil injection valve assembly under the action of gravity.

[0041] When piston 3 switches from the extended state to the retracted state, the volume of sealed chamber 1 increases, and the pressure inside sealed chamber 1 decreases. As a result, the lubricating oil in the lubricating oil tank enters sealed chamber 1 through the second pipeline CD under atmospheric pressure, that is, the lubricating oil is drawn into sealed chamber 1 from the second inlet C.

[0042] When piston 3 switches from the retracted state to the extended state, the volume of sealed chamber 1 decreases, the pressure inside sealed chamber 1 increases, and the lubricating oil inside sealed chamber 1 is pumped out under high pressure.

[0043] In this embodiment, the component further includes: a first check valve 4 disposed on the second pipeline C1, the first check valve 4 being used to control the lubricating oil to flow unidirectionally from the second inlet C to the sealed cavity 1, and the first check valve 4 being connected to the sealed cavity 1.

[0044] The first one-way valve 4 is used to control the lubricating oil to flow unidirectionally from the second inlet C through the second pipeline CD to the sealed cavity 1, that is, the lubricating oil in the sealed cavity 1 cannot flow back to the second inlet C.

[0045] In this embodiment, the lubricating oil injection valve assembly further includes: an output port E, which is used to output lubricating oil pumped out from the sealed chamber 1; and a third pipeline E1 disposed between the output port E and the sealed chamber 1, through which the lubricating oil pumped out from the sealed chamber 1 flows to the output port E.

[0046] The output port E is connected to a component that requires lubrication. In this embodiment, the components requiring lubrication include spindle bearings, propulsion cylinders, bushings, etc.

[0047] When piston 3 switches from the retracted state to the extended state, the volume of sealed chamber 1 decreases, and the pressure inside sealed chamber 1 increases. As a result, the lubricating oil inside sealed chamber 1 is pumped out to the components that need lubrication under high pressure.

[0048] In this embodiment, the component further includes: a second one-way valve 7 disposed on the third pipeline E1, the second one-way valve 7 being used to control the lubricating oil pumped from the sealed chamber 1 to flow unidirectionally from the sealed chamber 1 to the output port E, and the second one-way valve 7 being connected to the sealed chamber 1.

[0049] The second one-way valve 7 is used to control the lubricating oil pumped out from the sealed chamber 1 to flow unidirectionally from the sealed chamber 1 to the output port E, that is, the lubricating oil in the component connected to the second input port C cannot flow back to the sealed chamber 1.

[0050] In this embodiment, the lubricating oil injection valve assembly further includes a fourth pipeline B1 disposed between the rod chamber 31 and the sealed chamber 1.

[0051] In this embodiment, the component further includes a throttle valve 5 disposed on the fourth pipeline B1, the throttle valve 5 being used to control whether hydraulic oil enters the sealed chamber 1, and the throttle valve 5 being connected to the sealed chamber 1.

[0052] The hydraulic oil enters the sealed chamber 1 through the first inlet A, the first pipeline AB, and the fourth pipeline B1 to expel the air in the sealed chamber 1.

[0053] When the lubricating oil injection valve assembly is first installed on the main unit that needs lubrication, the sealed chamber 1 is filled with air. Air is easily compressed. As the volume of the sealed chamber 1 increases, the air is easily compressed, making it difficult for a negative pressure to form in the sealed chamber 1, and thus making it difficult to draw lubricating oil from the lubricating oil tank. At this time, the throttle valve 5 is opened to allow hydraulic oil to enter the sealed chamber 1 through the first pipeline AB and the fourth pipeline B1, so as to expel the air in the sealed chamber 1.

[0054] After the air in the sealed chamber 1 is vented, the throttle valve 5 is closed to prevent hydraulic oil from entering the sealed chamber 1.

[0055] When there is hydraulic oil in the sealed chamber 1, the hydraulic oil is not easily compressed. As a result, the volume of the sealed chamber 1 increases, which easily creates a negative pressure. Under the action of atmospheric pressure, the lubricating oil can easily enter the sealed chamber 1 through the second check valve 7, thereby achieving the purpose of pumping out.

[0056] In this embodiment, the sealed cavity 1 is formed by a piston 3, a first one-way valve 4, a second one-way valve 7, and a throttle valve 5 sealed within the valve body. The piston 3, the first one-way valve 4, the second one-way valve 7, and the throttle valve 5 are disposed within the valve body 8.

[0057] In other embodiments, the throttle valve may not be required.

[0058] In this embodiment, the lubricating oil injection valve assembly further includes a damping component 6 disposed on the fourth pipeline BD, the damping component 6 being disposed between the throttle valve 5 and the rod chamber 31.

[0059] In this embodiment, the damping component 6 is disposed between the throttle valve 5 and the first input port A, and is used to control the flow rate of hydraulic oil entering the sealed cavity 1 through the fourth pipeline BD and the throttle valve 5, so as to ensure that only a small amount of hydraulic oil enters the sealed cavity 1, and to avoid the situation where too much hydraulic oil enters the sealed cavity 1, which would affect the amount of lubricating oil subsequently drawn in and the quality of the liquid oil in the sealed cavity 1.

[0060] In this embodiment, the aperture of the damping component 6 is less than 1 mm.

[0061] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A lubricating oil injection valve assembly, characterized in that, include: A sealed cavity, the sealed cavity being formed within the valve body by a component connected to the sealed cavity; A piston is connected to the sealed cavity. The piston can extend into or retract into the sealed cavity. The piston and the valve body form a rod-shaped cavity and a rodless cavity. A solenoid valve, connected to the rodless chamber, is used to control the piston to extend into or retract into the sealed chamber, thereby adjusting the volume of the sealed chamber and controlling the intake or pumping of lubricating oil into or out of the sealed chamber.

2. The lubricating oil injection valve assembly as described in claim 1, characterized in that, Also includes: The first input port of the solenoid valve includes an oil inlet, an oil outlet, and a drain port. The oil inlet of the solenoid valve is connected to the first input port, the oil outlet of the solenoid valve is connected to the rodless chamber, and the drain port of the solenoid valve is connected to the hydraulic oil tank. The solenoid valve is used to control whether hydraulic oil enters the rodless chamber.

3. The lubricating oil injection valve assembly as described in claim 2, characterized in that, Also includes: First connection port; A first pipeline is disposed between the first connection port and the first input port. The first connection port is connected to the rod chamber, and the hydraulic oil enters the rod chamber through the first pipeline.

4. The lubricating oil injection valve assembly as described in claim 1, characterized in that, Also includes: A second inlet is connected to a lubricating oil tank; a second pipeline is provided between the sealed cavity and the second inlet, through which the lubricating oil enters the sealed cavity.

5. The lubricating oil injection valve assembly as described in claim 4, characterized in that, The component includes: a first check valve disposed on the second pipeline, the first check valve being used to control the lubricating oil to flow unidirectionally from the second inlet to the sealed cavity, the first check valve being connected to the sealed cavity.

6. The lubricating oil injection valve assembly as described in claim 1, characterized in that, Also includes: An output port, wherein the output port is used to output lubricating oil pumped from the sealed chamber; A third pipeline is installed between the output port and the sealed cavity, through which lubricating oil pumped from the sealed cavity flows to the output port.

7. The lubricating oil injection valve assembly as described in claim 6, characterized in that, The component includes: a second check valve disposed on the third pipeline, the second check valve being used to control the lubricating oil pumped from the sealed chamber to flow unidirectionally from the sealed chamber to the output port, the second check valve being connected to the sealed chamber.

8. The lubricating oil injection valve assembly as described in claim 1, characterized in that, Also includes: A fourth pipeline is disposed between the rod cavity and the sealed cavity; The component further includes a throttle valve disposed on the fourth pipeline, the throttle valve being used to control whether hydraulic oil enters the sealed chamber, and the throttle valve being connected to the sealed chamber.

9. The lubricating oil injection valve assembly as described in claim 8, characterized in that, Also includes: A damping assembly is installed on the fourth pipeline, and the damping assembly is located between the throttle valve and the rod chamber.

10. The lubricating oil injection valve assembly as described in claim 1, characterized in that, The piston experiences greater force in the rodless chamber than in the rod chamber.

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