Hydraulic valve group with follow-up function

Abstract

The hydraulic valve group with the follow-up function comprises a valve body box, a flowing cavity is formed in the valve body box, the bottom end of the flowing cavity penetrates through the valve body box, a partition plate is arranged at the top end in the flowing cavity, a piston is arranged in the flowing cavity in a sliding mode, and a supporting structure is arranged at the bottom end of the flowing cavity. The utility model relates to the technical field of hydraulic valve banks. According to the hydraulic valve bank with the follow-up function, when the hydraulic pump stops running, the piston is jacked up through the supporting mechanism, so that the communicating hole corresponds to pipe openings of the bent pipes, and at the moment, the oil liquid flowing pipes on the two sides communicate with the communicating hole through the two bent pipes; the oil outlet and the oil inlet of the hydraulic motor are communicated with each other through the two oil flowing pipes, so that when the hydraulic pump stops supplying oil, oil in the hydraulic motor can still flow, the effect of preventing the hydraulic motor from being damaged is achieved, and the purpose of protecting the hydraulic motor is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valve groups, and particularly relates to a hydraulic valve group with a follow-up function. Background Technique

[0002] A hydraulic valve group refers to a functionally complete hydraulic control system composed of different types of hydraulic valves. It is widely used in many fields such as construction machinery, mining machinery, hydraulic elevators, packaging machines, coking plant coal mines, injection molding machines, bending and stamping equipment, foundries, balers, steel mills, numerical control machine tools, and agricultural machinery. The main function of the hydraulic valve group is to regulate and control the flow, pressure, and direction in the hydraulic system to ensure the stable operation of the hydraulic system.

[0003] A hydraulic motor is an actuator in a hydraulic system. It converts the hydraulic pressure energy provided by the hydraulic pump into the mechanical energy of its output shaft. The working principle of the hydraulic motor is to drive the internal gears or pistons and other components to rotate through the flow and pressure of the hydraulic oil. Therefore, an oil circuit is formed between the hydraulic pump and the hydraulic motor for supplying energy to the hydraulic motor.

[0004] When the hydraulic motor suddenly stops supplying liquid under a load, the circuit formed between the hydraulic motor and the hydraulic pump is closed at this time, and the hydraulic motor will continue to rotate under the load. Therefore, problems such as negative pressure or pressure imbalance will occur inside the hydraulic motor, hydraulic valve group, and hydraulic pump, which may cause pressure spikes inside the system. Such pressure spikes may exceed the bearing capacity of the hydraulic motor and its related components, thereby causing damage;

[0005] Therefore, it is necessary to install a hydraulic valve group with a follow-up function at the connection between the hydraulic motor and the hydraulic pump. After the hydraulic motor or the actuator loses the power source, it can continue to move to achieve the purpose of protecting the hydraulic motor. Content of the Utility Model

[0006] In view of the deficiencies of the existing technology, the purpose of the utility model is to provide a hydraulic valve group with a follow-up function to facilitate solving the technical problems mentioned in the above background technique.

[0007] The above technical purpose of the utility model is achieved through the following technical solutions:

[0008] A hydraulic valve group with a follow-up function includes a valve body box. A flow cavity is arranged inside the valve body box, and the bottom end of the flow cavity penetrates through the valve body box. A partition is arranged at the top end inside the flow cavity, a piston is slidably arranged inside the flow cavity, and a support structure is arranged at the bottom end of the flow cavity;

[0009] On both inner sides of the valve body box, there are elbow pipes communicating with the flow cavity. At the ends of the two elbow pipes away from the flow cavity, there are oil fluid circulation pipes. On both sides of the top end of the flow cavity, there are connecting pipes, and the two connecting pipes are respectively connected to the two oil fluid circulation pipes. At the position corresponding to the partition plate at the top end of the piston, there is a positioning groove. At the position corresponding to the elbow pipe on the piston, there is a communication hole.

[0010] Furthermore, both ends of the two oil fluid circulation pipes penetrate through the valve body box, and at both ends penetrating through the valve body box, there are connecting threads. And in both pipe orifices at the top end of the valve body box, there are overload valves.

[0011] Furthermore, the support structure includes a mounting plate. The mounting plate is threadedly connected to the bottom end of the flow cavity. At the top end of the mounting plate, there is a support spring in contact with the bottom end of the piston.

[0012] Furthermore, the partition plate divides the upper inner part of the flow cavity into two cavities, and the two cavities are respectively connected to the two connecting pipes. At the positions of the valve body box corresponding to the two cavities, there are oil fluid guide pipes.

[0013] Furthermore, when the bottom end of the partition plate is in contact with the bottom end of the positioning groove, the axis line of the communication hole corresponds to the pipe orifice where the elbow pipe is connected to the flow cavity.

[0014] Furthermore, at the position on the side wall of the valve body box corresponding to the bent part of one of the oil fluid circulation pipes, there is a mounting hole. Inside the mounting hole, there is a supplementary oil valve, and the supplementary oil valve is connected to an oil supply tank.

[0015] In summary, the present utility model includes at least one of the following beneficial technical effects:

[0016] 1. For this hydraulic valve group with a follow-up function, when the hydraulic pump stops operating, the piston is pushed upward by the support mechanism, so that the communication hole corresponds to the pipe orifice of the elbow pipe. At this time, the two oil fluid circulation pipes on both sides are connected to each other through the two elbow pipes and the communication hole. Furthermore, the oil outlet and the oil inlet of the hydraulic motor are connected to each other through the two oil fluid circulation pipes. Furthermore, when the hydraulic pump stops supplying oil, the oil fluid inside the hydraulic motor can still flow, so as to achieve the effect of preventing the hydraulic motor from being damaged, thereby achieving the purpose of protecting the hydraulic motor;

[0017] 2. The hydraulic valve group with a follow-up function is provided with a mounting plate for installing and supporting a spring, so that when there is no oil entering the flow cavity at the top of the hydraulic valve group, the piston can be pushed upward, enabling the communication hole to correspond to the position of the elbow pipe, thus achieving the purpose of connecting two oil flow pipes. Moreover, since the mounting plate is connected by threads, when maintaining and servicing the hydraulic valve group, by removing the mounting plate and the piston, the pipes inside the valve body box can be made to be in a connected state, thereby facilitating the maintenance and servicing of the hydraulic valve group;

[0018] 3. For the hydraulic valve group with a follow-up function, when the bottom end of the partition plate contacts the bottom end of the positioning groove, the axis line of the communication hole corresponds to the pipe orifice where the elbow pipe is connected to the flow cavity. Therefore, the position of the piston can be effectively positioned, enabling the communication hole to align with the elbow pipe to ensure the connectivity of the two oil flow pipes when the hydraulic pump fails to supply oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of a hydraulic valve group with a follow-up function of the present invention.

[0021] Figure 2 It is a schematic internal structure diagram of the valve body box of a hydraulic valve group with a follow-up function of the present invention.

[0022] Figure 3 It is a schematic structural diagram of the oil flow pipe of a hydraulic valve group with a follow-up function of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the elbow pipe of a hydraulic valve group with a follow-up function of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the support structure of a hydraulic valve group with a follow-up function of the present invention.

[0025] In the figure, 1, valve body box; 2, flow cavity; 201, cavity; 202, oil conduit; 3, partition plate; 4, piston; 5, support structure; 501, mounting plate; 502, support spring; 6, elbow pipe; 7, oil flow pipe; 8, communication pipe; 9, positioning groove; 10, communication hole; 11, connecting thread; 12, overload valve; 13, mounting hole; 14, oil replenishing valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] Embodiment:

[0028] Referring to Figures 1 - 5 , a hydraulic valve group with a follow-up function disclosed by the present utility model includes a valve body box 1. A flow cavity 2 is arranged inside the valve body box 1, and the bottom end of the flow cavity 2 penetrates through the valve body box 1. A partition plate 3 is arranged at the top end inside the flow cavity 2. A piston 4 is slidably arranged inside the flow cavity 2. A support structure 5 is arranged at the bottom end of the flow cavity 2;

[0029] Two elbow pipes 6 communicating with the flow cavity 2 are arranged on both sides inside the valve body box 1. Oil fluid circulation pipes 7 are arranged at one ends of the two elbow pipes 6 far away from the flow cavity 2. Two communication pipes 8 are arranged on both sides at the top end of the flow cavity 2, and the two communication pipes 8 are respectively communicated with the two oil fluid circulation pipes 7. A positioning groove 9 is arranged at a position corresponding to the partition plate 3 at the top end of the piston 4. A communication hole 10 is arranged at a position corresponding to the elbow pipe 6 on the piston 4.

[0030] In this embodiment, during the use of the device, the oil inlet end and the oil outlet end of the hydraulic pump are respectively communicated with both sides of the partition plate 3 in the flow cavity 2. The bottom ends of the oil fluid circulation pipes 7 are respectively connected with the oil inlet and outlet ports of the hydraulic motor. The oil fluid enters the inside of the flow cavity 2 through the through holes arranged at the top end of the flow cavity 2, and the piston 4 is pushed downward by the pressure of the oil fluid. The positions of the communication hole 10 and the elbow pipe 6 are staggered. At this time, the two oil fluid circulation pipes 7 on both sides cannot be communicated with each other through the two elbow pipes 6. Therefore, when the hydraulic pump pumps the oil fluid into the flow cavity 2 and then enters the oil fluid circulation pipes 7 through the communication pipes 8, due to the partition plate 3 arranged at the top end inside the circulation cavity, the oil fluid can only enter the inside of one of the oil fluid circulation pipes 7 under the action of the partition plate 3. Therefore, the oil fluid will enter the inside of the hydraulic motor and then enter the other oil fluid circulation pipe 7 through the oil outlet port of the hydraulic motor, achieving the effect of driving the hydraulic motor to rotate;

[0031] When the hydraulic pump stops operating, at this time, the hydraulic pump and the hydraulic motor cannot form a loop. At this time, the piston 4 is jacked up by the support mechanism, so that the communication hole 10 corresponds to the pipe orifice of the elbow pipe 6. At this time, the two oil fluid circulation pipes 7 on both sides are communicated with each other through the two elbow pipes 6 and the communication hole 10. Furthermore, the oil outlet port and the oil inlet port of the hydraulic motor are communicated with each other through the two oil fluid circulation pipes 7. Furthermore, when the hydraulic pump stops supplying oil, the oil fluid inside the hydraulic motor can still flow, achieving the effect of preventing the hydraulic motor from being damaged, thereby achieving the purpose of protecting the hydraulic motor.

[0032] In a further preferred embodiment of the present utility model, as Figures 1 - 5As shown, both ends of the two oil fluid circulation pipes 7 penetrate through the valve body box 1, and connecting threads 11 are provided at both ends penetrating through the valve body box 1, and overload valves 12 are provided in the two pipe orifices at the top of the valve body box 1.

[0033] In this embodiment, through the setting of the connecting threads 11, the overload valves 12 are connected to the tops of the oil fluid circulation pipes 7, and the oil outlet and oil inlet of the hydraulic motor are respectively connected to the two oil fluid circulation pipes 7, so as to form a circuit between the hydraulic pump and the hydraulic motor to achieve the purpose of driving the hydraulic motor to rotate, and through the setting of the overload valves 12, the hydraulic motor is prevented from being damaged under overload conditions, and the equipment is protected by restricting the system pressure.

[0034] In a further preferred embodiment of the present utility model, as Figures 1 - 5 shown, the support structure 5 includes a mounting plate 501, the mounting plate 501 is threadedly connected to the bottom end of the flow cavity 2, and a support spring 502 in contact with the bottom end of the piston 4 is provided at the top end of the mounting plate 501.

[0035] In this embodiment, the mounting plate 501 is provided for mounting the support spring 502, so that when no oil fluid enters the flow cavity 2 at the top end of the hydraulic valve group, the piston 4 is pushed upward, so that the position of the communication hole 10 corresponds to that of the elbow pipe 6, achieving the purpose of connecting the two oil fluid circulation pipes 7, and since the mounting plate 501 is threadedly connected, when maintaining and servicing the hydraulic valve group, by removing the mounting plate 501 and the piston 4, the pipes inside the valve body box 1 can be in a connected state, and further the purpose of facilitating the maintenance and servicing of the hydraulic valve group is achieved.

[0036] In a further preferred embodiment of the present utility model, as Figures 1 - 5 shown, the partition plate 3 divides the upper inner part of the flow cavity 2 into two cavities 201, and the two cavities 201 are respectively communicated with the two communication pipes 8, and oil fluid conduits 202 are provided at the positions of the valve body box corresponding to the two cavities 201.

[0037] In this embodiment, through the setting of the two cavities 201 being respectively communicated with the communication pipes 8, when the hydraulic pump introduces hydraulic oil into the inside of the flow cavity 2 through the oil fluid conduits 202, effective shunting can be carried out through the partition plate 3, so that the oil fluid enters the hydraulic motor through one of the oil fluid circulation pipes 7 and flows out through the other oil fluid circulation pipe 7, achieving the purpose of forming a circuit between the hydraulic pump and the hydraulic motor.

[0038] In a further preferred embodiment of the present utility model, as Figures 1 - 5 shown, when the bottom end of the partition plate 3 is in contact with the bottom end of the positioning groove 9, the axis line of the communication hole 10 corresponds to the pipe orifice where the elbow pipe 6 is connected to the flow cavity 2.

[0039] In this embodiment, when the bottom end of the partition plate 3 contacts the bottom end of the positioning groove 9, the axis line of the communication hole 10 corresponds to the pipe orifice where the elbow pipe 6 is connected to the flow chamber 2. Therefore, the position of the piston 4 can be effectively positioned, enabling the communication hole 10 to be aligned with the elbow pipe 6 to ensure the connectivity of the two oil circulation pipes 7 when the hydraulic pump fails to supply oil.

[0040] In a further preferred embodiment of the present utility model, as Figures 1 - 5 shown, an installation hole 13 is provided at a position corresponding to the bent portion of one of the oil circulation pipes 7 on the side wall of the valve body box 1. A make-up oil valve 14 is arranged inside the installation hole 13, and the make-up oil valve 14 is communicated with an oil supply tank.

[0041] In this embodiment, the installation hole 13 is provided for installing the make-up oil valve 14 and communicating with the oil supply tank. When the oil in the hydraulic system is insufficient, the make-up oil valve 14 will automatically open and supplement the oil to ensure the continuous and stable operation of the system.

[0042] The embodiments of this specific implementation manner are all preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A hydraulic valve group with follow-up function, characterized in that: The invention comprises a valve body box (1), wherein a flow chamber (2) is arranged inside the valve body box (1), and the bottom end of the flow chamber (2) passes through the valve body box (1), a partition plate (3) is arranged at the top end of the flow chamber (2), a piston (4) is slidably arranged inside the flow chamber (2), and a support structure (5) is arranged at the bottom end of the flow chamber (2); Bend pipes (6) connected to the flow chamber (2) are arranged on both sides of the interior of the valve body box (1); oil flow pipes (7) are arranged at one end of the two bend pipes (6) away from the flow chamber (2); connecting pipes (8) are arranged on both sides of the top of the flow chamber (2); and the two connecting pipes (8) are respectively connected to the two oil flow pipes (7); a positioning groove (9) is arranged at a position corresponding to the top of the piston (4) and the partition (3); and a connecting hole (10) is opened at a position corresponding to the piston (4) and the bend pipe (6); The support structure (5) comprises a mounting plate (501), wherein the mounting plate (501) is threadedly connected to the bottom end of the flow chamber (2), and a support spring (502) in contact with the bottom end of the piston (4) is arranged at the top end of the mounting plate (501).

2. A hydraulic valve group with follow-up function according to claim 1, characterized in that: Both ends of the two oil flow pipes (7) pass through the valve body box (1), and both ends passing through the valve body box (1) are provided with connecting threads (11), and overload valves (12) are provided in the two pipe openings located at the top of the valve body box (1).

3. A hydraulic valve group with follow-up function according to claim 2, characterized in that: The partition plate (3) divides the inner upper end of the flow chamber (2) into two chambers (201), and the two chambers (201) are respectively connected to two connecting pipes (8), and oil conduits (202) are provided at positions corresponding to the valve body box and the two chambers (201).

4. A hydraulic valve group with follow-up function according to claim 3, characterized in that: When the bottom end of the partition plate (3) and the bottom end of the positioning groove (9) are in contact with each other, the axis of the connecting hole (10) corresponds to the pipe opening connecting the curved pipe (6) and the flow chamber (2).

5. The hydraulic valve group with follow-up function according to claim 4, characterized in that: A mounting hole (13) is provided on the side wall of the valve body box (1) at a position corresponding to the bending position of one of the oil flow pipes (7), an oil replenishing valve (14) is arranged inside the mounting hole (13), and the oil replenishing valve (14) is connected to the oil supply tank.

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