Main hydraulic station valve block

Abstract

The utility model relates to the technical field of valve blocks, in particular to a main hydraulic station valve block which comprises a valve block body, an oil inlet channel, an oil outlet channel and an oil return channel are arranged on the valve block body, the oil inlet channel and the oil outlet channel are communicated in the valve block body, and one end, close to the side face of the valve block body, of the oil inlet channel is in threaded connection with an oil inlet pipe. According to the main hydraulic station valve block, the valve block body, the oil inlet channel, the oil inlet pipe, the oil outlet channel, the oil outlet pipe, an oil return channel, a main oil return pipe, an auxiliary oil return pipe, a pressure gauge, a push rod, an electric telescopic rod, an external channel, a partial pressure channel, a buffer plate and a sealing sliding sleeve are used in cooperation, and when flowing back oil enters the partial pressure channel through the oil return channel, the buffer plate is firstly impacted; the buffer plates block the oil liquid and evenly distribute the oil liquid to the two sides of the partial pressure channel, and meanwhile the oil liquid is decelerated. And the vertical movement of the buffer plate also controls the flow area of the oil entering the partial pressure channel, so that the pressure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valve blocks, in particular to a main hydraulic station valve block. Background Art

[0002] A hydraulic station is an electromechanical device used to power large and medium-sized industrial production machinery. It primarily consists of components such as a hydraulic pump, a drive motor, a fuel tank, a directional valve, a throttle valve, and a relief valve. During oil flow, the hydraulic station often uses a valve block to reverse and divert the flow, thereby enabling multi-directional oil flow to drive the movement of multiple actuators. The basic valve block typically includes an outlet line and a return line, fixedly mounted on the fuel tank. Driven by the drive motor, the hydraulic pump transfers the oil from the tank to the external cylinder via the outlet line. The high-pressure oil generated by the external cylinder then flows back to the tank via the return line, completing a closed-loop hydraulic system.

[0003] Publication number CN218624806U, a Chinese patent discloses a main hydraulic station valve block, comprising a valve block body with an oil inlet channel, an oil outlet channel, and an oil return channel. The oil return channel comprises a main oil return channel, a first pressure-dividing channel, and a second pressure-dividing channel. The first pressure-dividing channel is provided with an electromagnetic ball unloading valve, and the main oil return channel is provided with a buffer assembly. This reduces the flow rate of the oil, minimizing damage to the oil return channel and oil return line, extending the service life of the oil return line, eliminating the need for frequent oil return line replacement, and thus improving the operating efficiency of the main hydraulic station. The buffer assembly also further decelerates and reduces the pressure of the oil, thereby enhancing the decompression effect of the oil.

[0004] Regarding the related technologies mentioned above, this valve block has some shortcomings. In actual use, due to the different pressure relief structures of the two pressure-dividing channels, the pressure of the oil entering the two pressure-dividing channels is unbalanced. This may cause one auxiliary oil return pipe to be subjected to greater pressure and more easily damaged, while the other auxiliary oil return pipe is relatively less stressed and has a longer lifespan. After long-term operation, the auxiliary oil return pipe subjected to high pressure is more likely to leak, burst, or other failures, while the other auxiliary oil return pipe may perform normally. This imbalance can lead to unstable system operation, increase maintenance costs, and may even affect the performance and safety of the overall hydraulic system. Therefore, it is necessary to provide a main hydraulic station valve block to solve the above technical problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a main hydraulic station valve block to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A main hydraulic station valve block, comprising:

[0008] A valve block body, wherein the valve block body is provided with an oil inlet channel, an oil outlet channel and an oil return channel, and the oil inlet channel and the oil outlet channel are connected inside the valve block body, an end of the oil inlet channel close to the side of the valve block body is threadedly connected to an oil inlet pipe, an end of the oil outlet channel close to the top of the valve block body is threadedly connected to an oil outlet pipe, and an end of the oil return channel close to the top of the valve block body is threadedly connected to a main oil return pipe, a pressure dividing channel is provided inside the valve block body below the oil return channel, and the top of the inner wall of the pressure dividing channel is connected to the interior of the oil return channel;

[0009] External channels are provided on both sides of the bottom of the valve block body, and the two external channels are respectively connected to the two ends of the pressure-dividing channel. The ends of the two external channels close to the bottom of the valve block body are threadedly connected to the auxiliary oil return pipe. The valve block body has an installation cavity provided inside, and an electric telescopic rod is fixed inside the installation cavity by bolts.

[0010] A sealing sleeve is fixedly installed on the inner wall of the pressure-dividing channel and is located just below the bottom end of the oil return channel, and the bottom end of the sealing sleeve extends into the interior of the installation cavity. A push rod is provided on the driving end of the electric telescopic rod, and the push rod is slidably connected to the sealing sleeve. A buffer plate is fixedly installed on the top end of the push rod, and the buffer plate is slidably connected to the inner wall of the pressure-dividing channel.

[0011] Preferably, a mounting groove is provided at the bottom end of the push rod, a mounting block is fixedly installed at the driving end of the electric telescopic rod, and the mounting block is clamped in the mounting groove, a threaded hole is provided at the bottom of one side of the outer wall of the push rod, and the threaded hole is connected to the inside of the mounting groove, the push rod is threadedly connected to a butterfly bolt through the threaded hole, a threaded groove is provided on the mounting block, and the threaded groove is threadedly connected to the butterfly bolt.

[0012] Preferably, the installation cavity is communicated with the front surface of the valve block body, and the front surface of the valve block body is located at the front end opening of the installation cavity and is fixedly connected with an end cover by bolts.

[0013] Preferably, the pressure dividing channel is in an inverted U-shape, and the cross section of the pressure dividing channel is rectangular.

[0014] Preferably, the buffer plate is in the shape of an arc plate.

[0015] Preferably, a pressure gauge is provided on the main oil return pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The utility model uses the valve block body, the oil inlet channel, the oil inlet pipe, the oil outlet channel, the oil outlet pipe, the oil return channel, the main oil return pipe, the auxiliary oil return pipe, the pressure gauge, the push rod, the electric telescopic rod, the external channel, the pressure dividing channel, the buffer plate and the sealing sleeve in coordination. When the returning oil enters the pressure dividing channel through the oil return channel, it first impacts the buffer plate. The buffer plate blocks the oil and evenly diverts it to both sides of the pressure dividing channel, while slowing down the oil. The vertical movement of the buffer plate also controls the flow area of ​​the oil entering the pressure dividing channel, thereby reducing the pressure. The decompressed oil evenly enters the auxiliary oil return pipe through the two external channels and flows back to the oil tank. This structure ensures the pressure balance of the oil inside the pressure dividing channel, thereby improving the stability and reliability of the hydraulic system.

[0018] 2. This utility model utilizes mounting slots, threaded grooves, butterfly bolts, threaded holes, and mounting blocks in a quick-release design, allowing workers to quickly disassemble and assemble the electric telescopic rod in the event of a malfunction, allowing for necessary repair or replacement. This convenient maintenance method helps reduce hydraulic system downtime, improves overall system efficiency, and facilitates repair work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 It is a front view cross-sectional structural schematic diagram of the present invention.

[0021] Figure 3 It is a schematic cross-sectional structural diagram of the pressure dividing channel and the external connection channel in the utility model.

[0022] Figure 4 For the utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0023] In the figure: 1. Valve block body; 2. Oil inlet channel; 3. Oil inlet pipe; 4. Oil outlet channel; 5. Oil outlet pipe; 6. Oil return channel; 7. Main oil return pipe; 8. Auxiliary oil return pipe; 9. Pressure gauge; 10. End cover; 11. Push rod; 12. Electric telescopic rod; 13. Mounting cavity; 14. External channel; 15. Pressure dividing channel; 16. Buffer plate; 17. Sealing sleeve; 18. Mounting groove; 19. Threaded groove; 20. Butterfly bolt; 21. Threaded hole; 22. Mounting block. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1-4 , an embodiment provided by the utility model:

[0029] A main hydraulic station valve block, comprising:

[0030] The valve block body 1 is provided with an oil inlet channel 2, an oil outlet channel 4 and an oil return channel 6, and the oil inlet channel 2 and the oil outlet channel 4 are connected inside the valve block body 1. The end of the oil inlet channel 2 close to the side of the valve block body 1 is threadedly connected to the oil inlet pipe 3, the end of the oil outlet channel 4 close to the top of the valve block body 1 is threadedly connected to the oil outlet pipe 5, and the end of the oil return channel 6 close to the top of the valve block body 1 is threadedly connected to the main oil return pipe 7. A pressure dividing channel 15 is provided inside the valve block body 1 below the oil return channel 6, and the top of the inner wall of the pressure dividing channel 15 is connected to the inside of the oil return channel 6;

[0031] External channels 14 are provided on both sides of the bottom of the valve block body 1, and the two external channels 14 are respectively connected to the two ends of the pressure-dividing channel 15. The ends of the two external channels 14 near the bottom of the valve block body 1 are both threadedly connected to the auxiliary oil return pipe 8. The valve block body 1 has an installation cavity 13 inside, and an electric telescopic rod 12 is fixedly installed in the installation cavity 13 by bolts.

[0032] A sealing sleeve 17 is fixedly installed on the inner wall of the pressure-dividing channel 15 and is located just below the bottom end of the oil return channel 6. The bottom end of the sealing sleeve 17 extends into the interior of the mounting cavity 13. A push rod 11 is provided on the driving end of the electric telescopic rod 12, and the push rod 11 is slidably connected to the sealing sleeve 17. A buffer plate 16 is fixedly installed on the top end of the push rod 11, and the buffer plate 16 is slidably connected to the inner wall of the pressure-dividing channel 15.

[0033] A mounting groove 18 is provided at the bottom end of the push rod 11, and a mounting block 22 is fixedly installed on the driving end of the electric telescopic rod 12, and the mounting block 22 is engaged with the mounting groove 18. A threaded hole 21 is provided at the bottom of one side of the outer wall of the push rod 11, and the threaded hole 21 is connected to the interior of the mounting groove 18. The push rod 11 is threadedly connected to a butterfly bolt 20 through the threaded hole 21, and a threaded groove 19 is provided on the mounting block 22, and the threaded groove 19 is threadedly connected to the butterfly bolt 20.

[0034] In one embodiment, the installation cavity 13 is connected to the front of the valve block body 1, and the front of the valve block body 1 is located at the front end opening of the installation cavity 13 and is fixedly connected with the end cover 10 by bolts, so that the staff can operate its internal mechanical structure through the installation cavity 13, thereby simplifying the installation and maintenance process.

[0035] In one of the preferred embodiments, the pressure dividing channel 15 is in an inverted U-shape, and the cross-section of the pressure dividing channel 15 is rectangular. The inverted U-shaped design of the pressure dividing channel 15 helps to achieve more uniform fluid distribution. The cross-section of the pressure dividing channel 15 is rectangular, so that the pressure dividing channel 15 and the buffer plate 16 can be used in combination more appropriately.

[0036] In one embodiment, the buffer plate 16 is in the shape of an arc-shaped plate. The arc-shaped structure can more effectively absorb and disperse impact force, and reduce friction and wear.

[0037] In one of the preferred embodiments, a pressure gauge 9 is provided on the main oil return pipe 7 , and the pressure gauge 9 can monitor the oil pressure in the main oil return pipe 7 in real time, so as to facilitate the stable operation of the entire pressure relief process.

[0038] The working principle of the present invention is as follows: the electrical components appearing in the text are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for controlling a computer, etc., and the existing disclosed power connection technology is not described in detail in the text. The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. When in use, the oil inlet pipe 3 is connected to the oil tank through the hydraulic pump, and the oil outlet pipe 5 is used to transport the oil to the oil cylinder. The main oil return pipe 7 connects the oil cylinder and the auxiliary oil return pipe 8 to the oil tank and is used to guide the high-pressure oil generated by the oil cylinder into the oil tank. The oil in the oil cylinder flows back to the return oil channel 6 through the main oil return pipe 7. The pressure gauge 9 detects the pressure of the return oil. When the pressure reaches the limit, the main controller will control the electric telescopic rod 12 to start working. The driving end of the electric telescopic rod 12 drives the push rod 11 to move vertically. The movement of the push rod 11 drives the buffer plate 16 to move, so that the buffer The punch plate 16 moves downward inside the pressure-dividing channel 15, increasing the flow area of ​​the oil entering the pressure-dividing channel 15, thereby achieving a pressure-reducing effect. In the process of the reflux oil entering the pressure-dividing channel 15 through the return oil channel 6, it will directly impact the buffer plate 16. The buffer plate 16 will first produce a blockage for the oil and divert it evenly to the channels on both sides of the pressure-dividing channel 15. The blockage of the buffer plate 16 will slow down the oil, and the vertical movement of the buffer plate 16 will control the flow area of ​​the oil entering the pressure-dividing channel 15. The larger the flow area, the smaller the pressure of the oil entering the pressure-dividing channel 15. The oil that has been reduced in pressure eventually enters the auxiliary return oil pipe 8 evenly from the two external channels 14 and flows back to the oil tank through the auxiliary return oil pipe 8. The balancing of the pressure relief structure makes the pressure distribution of the two auxiliary return oil pipes 8 balanced, thereby improving the stability of the operation of the entire hydraulic system.

[0039] When the electric telescopic rod 12 fails, the operator can first remove the end cover 10 on the front end of the mounting cavity 13, then reach into the interior of the mounting cavity 13, loosen the butterfly bolt 20 and unscrew the butterfly bolt 20 from the interior of the threaded groove 19, and then push the mounting block 22 upward to disengage the mounting block 22 from the interior of the mounting groove 18 after losing the limit of the butterfly bolt 20. At this time, the electric telescopic rod 12 will lose the fixation between it and the push rod 11, and the electric telescopic rod 12 can be removed from the interior of the mounting cavity 13 for inspection or replacement. By setting the quick-release structure between the electric telescopic rod 12 and the push rod 11, once the electric telescopic rod 12 fails, the operator can quickly disassemble and replace it for inspection and maintenance, thereby reducing the downtime of the hydraulic system and facilitating people's inspection and maintenance work.

[0040] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A main hydraulic station valve block, characterized in that: It includes: A valve block body (1), wherein the valve block body (1) is provided with an oil inlet channel (2), an oil outlet channel (4) and an oil return channel (6), and the oil inlet channel (2) and the oil outlet channel (4) are connected inside the valve block body (1); an end of the oil inlet channel (2) close to the side of the valve block body (1) is threadedly connected to an oil inlet pipe (3); an end of the oil outlet channel (4) close to the top of the valve block body (1) is threadedly connected to an oil outlet pipe (5); an end of the oil return channel (6) close to the top of the valve block body (1) is threadedly connected to a main oil return pipe (7); a pressure dividing channel (15) is provided inside the valve block body (1) below the oil return channel (6), and the top of the inner wall of the pressure dividing channel (15) is connected to the inside of the oil return channel (6); External channels (14) are provided on both sides of the bottom of the valve block body (1), and the two external channels (14) are respectively connected to the two ends of the pressure-dividing channel (15), and one end of the two external channels (14) close to the bottom of the valve block body (1) is threadedly connected to the auxiliary oil return pipe (8), and an installation cavity (13) is provided inside the valve block body (1), and an electric telescopic rod (12) is fixed inside the installation cavity (13) by bolts; A sealing sleeve (17) is fixedly installed on the inner wall of the pressure-dividing channel (15) and is located just below the bottom end of the oil return channel (6), and the bottom end of the sealing sleeve (17) extends into the interior of the installation cavity (13). A push rod (11) is provided on the driving end of the electric telescopic rod (12), and the push rod (11) is slidably connected to the sealing sleeve (17). A buffer plate (16) is fixedly installed on the top end of the push rod (11), and the buffer plate (16) is slidably connected to the inner wall of the pressure-dividing channel (15).

2. A main hydraulic station valve block according to claim 1, characterized in that: The bottom end of the push rod (11) is provided with a mounting groove (18), the driving end of the electric telescopic rod (12) is fixedly installed with a mounting block (22), and the mounting block (22) is clamped with the mounting groove (18), a threaded hole (21) is provided below one side of the outer wall of the push rod (11), and the threaded hole (21) is connected to the inside of the mounting groove (18), the push rod (11) is threadedly connected to a butterfly bolt (20) through the threaded hole (21), and a threaded groove (19) is provided on the mounting block (22), and the threaded groove (19) is threadedly connected to the butterfly bolt (20).

3. The main hydraulic station valve block according to claim 1, characterized in that: The installation cavity (13) is communicated with the front face of the valve block body (1), and the front face of the valve block body (1) is located at the front end opening of the installation cavity (13) and is fixedly connected with an end cover (10) by bolts.

4. The main hydraulic station valve block according to claim 1, characterized in that: The pressure dividing channel (15) is in an inverted U-shape, and the cross section of the pressure dividing channel (15) is rectangular.

5. The main hydraulic station valve block according to claim 1, characterized in that: The buffer plate (16) is in the shape of an arc plate.

6. The main hydraulic station valve block according to claim 1, characterized in that: A pressure gauge (9) is provided on the main oil return pipe (7).

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