Hydraulic control brake valve group

Abstract

The utility model discloses a hydraulic control brake valve group which is used for brake control of a hydraulic motor and comprises a valve block, an internal control sequence valve and a pressure reducing valve, and the valve block is provided with a working oil port, at least one pressure oil inlet and an oil return port. The internal control sequence valve is arranged on the valve block, the internal control sequence valve is provided with a first port, a second port, an oil return port and a control port, the first port is communicated with a working oil port of the valve block, the second port is communicated with a pressure oil inlet of the valve block, and the control port is communicated with a pressure oil outlet of the valve block. The oil return port is communicated with an oil return port of the valve block; the internal control sequence valve is suitable for selectively communicating the second port with the first port or communicating the first port with the oil return port according to the relative magnitude of the pressure of the control port and the preset switching pressure. The hydraulic motor can be quickly braked, the hydraulic motor can stably work in a wide oil pressure range, and the use reliability is improved.

Description

Technical Field

[0001] The utility model relates to a liquid control brake valve group, belonging to the technical field of hydraulic motors. Background Art

[0002] At present, liquid control braking is a braking method widely used in the fields of modern industry and transportation, and is widely used in many industries such as automobiles, construction machinery, and machine tool equipment. Among them, the control valve group, as the core component of the liquid control braking system, its performance directly affects the safety and reliability of the entire braking system.

[0003] After retrieving the existing technology, it is found that the Chinese patent with the publication number CN213954033U discloses a liquid control braking control valve group. This patent realizes the oil circuit switching through the switching of the liquid control reversing valve. However, it is found in the use process that due to the limited oil pressure application range of the liquid control reversing valve, it is easily affected by excessive pressure, resulting in valve body damage or performance degradation, and unstable use. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to overcome the defects of the existing technology and provide a liquid control brake valve group, which can quickly realize the braking of the hydraulic motor and stably work within a wide oil pressure range, improving the use reliability.

[0005] To solve the above technical problem, the technical solution of the utility model is: a liquid control brake valve group for the braking control of a hydraulic motor, including:

[0006] A valve block, on which a working oil port, at least one pressure inlet port, and a return oil port are provided;

[0007] An internal control sequence valve, which is arranged on the valve block. The internal control sequence valve is provided with a first port, a second port, a return oil port, and a control port. The first port is communicated with the working oil port of the valve block, the second port is communicated with the pressure inlet port of the valve block, and the return oil port is communicated with the return oil port of the valve block;

[0008] The internal control sequence valve is adapted to selectively communicate the second port with the first port or the first port with the return oil port according to the relative magnitude of the pressure at the control port and the preset switching pressure;

[0009] A pressure reducing valve, which is arranged on the valve block. The pressure reducing valve is provided with an oil inlet port, an oil outlet port, and a return oil port. The oil inlet port is communicated with the pressure inlet port, the oil outlet port is respectively communicated with the control port and the second port of the internal control sequence valve, and the return oil port is communicated with the return oil port of the valve block.

[0010] Further, a pressure measuring port is also provided on the valve block, and the pressure measuring port is connected between the oil outlet of the pressure reducing valve and the second port of the internal control sequence valve through an oil passage.

[0011] Further, a plug is provided on the pressure measuring port.

[0012] Further, there are two pressure inlet ports.

[0013] Further, the hydraulic control brake valve group further includes a shuttle valve. The shuttle valve is arranged on the valve block, and the shuttle valve is provided with two inlet ports and one outlet port;

[0014] The two inlet ports are respectively communicated with the two pressure inlet ports of the valve block, and the outlet port is communicated with the inlet port of the pressure reducing valve.

[0015] Further, a plurality of mounting holes are provided on the valve block, and the mounting holes are adapted to fix the valve block.

[0016] Further, the set pressure reduction output value of the pressure reducing valve is 40 bar.

[0017] Further, the preset switching pressure of the control port of the internal control sequence valve is 25 bar.

[0018] Further, the surface of the valve block is galvanized.

[0019] Adopting the above technical solution, the utility model has the following beneficial effects:

[0020] In the utility model, when the hydraulic motor needs to rotate, the high-pressure oil at the pressure inlet port first passes through the pressure reducing valve for pressure regulation, and the decompressed oil enters the second port and the control port of the internal control sequence valve through the oil outlet of the pressure reducing valve. Since the oil pressure entering the control port is greater than the preset switching pressure at this time, the internal control sequence valve connects the second port and the first port, and the oil passes through the working oil port into the hydraulic motor, releasing the brake of the hydraulic motor. When the hydraulic motor needs to stop, the pressure at the pressure inlet port drops, the pressure at the control port is less than the preset switching pressure, and the internal control sequence valve switches to connect the first port and the oil return port, and the oil at the working oil port directly returns to the oil return port, thereby realizing the rapid stop of the hydraulic motor.

[0021] Furthermore, in the present utility model, a pressure measurement port is provided on the valve block and connected between the oil outlet of the pressure reducing valve and the second port of the internal control sequence valve, enabling convenient pressure measurement and monitoring to ensure the reliable operation of the system. In addition, by providing two oil ports at the pressure inlet port and configuring a shuttle valve structure, selective control of multiple-path pressure input can be achieved, further improving the flexibility and stability of the hydraulic system. The design of multiple mounting holes on the valve block enables the valve group to be conveniently installed in various hydraulic systems, enhancing applicability, while the galvanized treatment on the valve block surface improves corrosion resistance and service life.

[0022] In summary, the present utility model can not only achieve the rapid braking of the hydraulic motor but also improve reliability and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of the hydraulic control braking valve group of the present utility model;

[0024] Figure 2 is a front view of the hydraulic control braking valve group of the present utility model;

[0025] Figure 3 is a bottom view of the hydraulic control braking valve group of the present utility model;

[0026] Figure 4 is a schematic diagram of the principle of the hydraulic control braking valve group of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the content of the present utility model more clearly understood, the following further detailed description of the present utility model is given according to specific embodiments in conjunction with the accompanying drawings.

[0028] As Figures 1-4 shown, a hydraulic control braking valve group for the braking control of a hydraulic motor includes:

[0029] A valve block 1, on which there are a working oil port 11, two pressure inlet ports 12, and a return oil port 13;

[0030] An internal control sequence valve 2, which is arranged on the valve block 1. The internal control sequence valve 2 has a first port, a second port, a return oil port, and a control port. The first port is communicated with the working oil port 11 of the valve block 1, the second port is communicated with the pressure inlet port 12 of the valve block 1, and the return oil port is communicated with the return oil port 13 of the valve block 1;

[0031] The internal control sequence valve 2 is adapted to selectively communicate the second port with the first port or communicate the first port with the return oil port according to the relative magnitude of the pressure at the control port and a preset switching pressure;

[0032] A pressure reducing valve 3 is provided on the valve block 1. The pressure reducing valve 3 is provided with an oil inlet, an oil outlet and an oil return port. The oil inlet is communicated with the pressure oil inlet 12, the oil outlet is respectively communicated with the control port and the second port of the internally controlled sequence valve 2, and the oil return port is communicated with the oil return port 13 of the valve block 1.

[0033] In this embodiment, as Figure 1 and Figure 4 shown, when the hydraulic motor needs to rotate, the high-pressure oil at the pressure oil inlet 12 first passes through the pressure reducing valve 3 for pressure regulation, and the decompressed oil enters the second port and the control port of the internally controlled sequence valve 2 through the oil outlet of the pressure reducing valve 3. Since the oil pressure entering the control port at this time is greater than the preset switching pressure, the internally controlled sequence valve 2 connects the second port with the first port, and the oil passes through the working oil port into the hydraulic motor, releasing the brake of the hydraulic motor. When the hydraulic motor needs to stop, the pressure at the pressure oil inlet 12 drops, the pressure at the control port is less than the preset switching pressure, and the internally controlled sequence valve 2 switches to connect the first port with the oil return port, and the oil at the working oil port directly returns to the oil return port, thereby realizing the rapid stop of the hydraulic motor.

[0034] The specification sizes of the working oil port 11 of the valve block and the two pressure oil inlets 12 are both G1 / 4, and the specification size of the oil return port 13 is G3 / 8. The maximum working pressure is 240 bar.

[0035] Specifically, as Figure 1 and Figure 4 shown, a pressure measuring port is also provided on the valve block 1, and the pressure measuring port is connected by an oil circuit between the oil outlet of the pressure reducing valve 3 and the second port of the internally controlled sequence valve 2.

[0036] Specifically, as Figure 3 shown, a plug 4 is provided on the pressure measuring port.

[0037] In this embodiment, as Figure 3 shown, the pressure measuring port can accurately monitor the pressure of the decompressed oil. It is convenient to check and monitor the oil pressure in the system to ensure the normal operation of the equipment.

[0038] The specification size of the pressure measuring port is also G1 / 4, and the plug 4 used is of the type with a dust cover connected by a chain.

[0039] Specifically, as Figure 1 and Figure 4 shown, there are two pressure oil inlets 12.

[0040] In some embodiments, the number of the pressure oil inlets 12 is not limited to two and can be set according to specific requirements.

[0041] Specifically, as Figure 1 and Figure 4As shown, the hydraulic control valve group further includes a shuttle valve 5. The shuttle valve 5 is arranged on the valve block 1. The shuttle valve 5 has two oil inlets and one oil outlet.

[0042] The two oil inlets are respectively communicated with two pressure oil inlets 12 of the valve block 1, and the oil outlet is communicated with the oil inlet of the pressure reducing valve 3.

[0043] In this embodiment, as Figure 1 and Figure 4 shown, when the pressures of the two pressure oil inlets 12 are different, the shuttle valve 5 will automatically switch to the side with higher pressure and deliver the high-pressure oil to the pressure reducing valve 3. For example, in the case of the failure or insufficient pressure of one pressure source, the system can seamlessly switch to another pressure source to ensure normal operation.

[0044] Specifically, as Figure 1 and Figure 3 shown, the valve block 1 is provided with two mounting holes 15, and the mounting holes 15 are suitable for fixing the valve block 1.

[0045] In this embodiment, as Figure 1 and Figure 3 shown, the size of the mounting hole 15 is M8 and the depth is 16 mm. The main function of these mounting holes 15 is to fix the valve block 1. The design of the mounting holes 15 takes into account the installation requirements of the hydraulic control valve group in actual applications to ensure that it can be firmly installed in the designated position and prevent loosening or displacement during operation.

[0046] The two mounting holes 15 are arranged on the valve block 1 in a diagonal manner.

[0047] In some embodiments, the number of the mounting holes 15 is not limited to two and can be set according to specific requirements.

[0048] Specifically, as Figure 4 shown, the set pressure reducing output value of the pressure reducing valve 3 is 40 bar.

[0049] Specifically, as Figure 4 shown, the preset switching pressure of the control port of the internal control sequence valve 2 is 25 bar.

[0050] In some embodiments, the set pressure reducing output value of the pressure reducing valve 3 and the preset switching pressure of the control port of the internal control sequence valve 2 are not limited to 40 bar and 25 bar and can be set according to specific requirements.

[0051] Specifically, as Figure 1 shown, the surface of the valve block 1 is galvanized.

[0052] In this embodiment, as Figure 1 shown, the galvanizing treatment can not only improve the appearance of the valve block 1, but more importantly, significantly improve its corrosion resistance and service life.

[0053] In the specific embodiments described above, the technical problems solved, technical solutions and beneficial effects of the present utility model have been further described in detail. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A liquid control brake valve group for braking control of a hydraulic motor, characterized in that, Comprising: A valve block (1), on which there are a working oil port (11), at least one pressure inlet port (12) and a return oil port (13); An internally controlled sequence valve (2), which is arranged on the valve block (1). The internally controlled sequence valve (2) has a first port, a second port, a return oil port and a control port. The first port is communicated with the working oil port (11) of the valve block (1), the second port is communicated with the pressure inlet port (12) of the valve block (1), and the return oil port is communicated with the return oil port (13) of the valve block (1); The internally controlled sequence valve (2) is adapted to selectively communicate the second port with the first port, or communicate the first port with the return oil port according to the relative magnitude of the pressure at the control port and a preset switching pressure; A pressure reducing valve (3), which is arranged on the valve block (1). The pressure reducing valve (3) has an inlet port, an outlet port and a return oil port. The inlet port is communicated with the pressure inlet port (12), the outlet port is respectively communicated with the control port and the second port of the internally controlled sequence valve (2), and the return oil port is communicated with the return oil port (13) of the valve block (1).

2. The hydraulic control brake valve group according to claim 1, characterized in that A pressure measuring port is further arranged on the valve block (1), and the pressure measuring port is connected by an oil path between the outlet port of the pressure reducing valve (3) and the second port of the internally controlled sequence valve (2).

3. The hydraulic control brake valve group according to claim 2, characterized in that A plug (4) is arranged on the pressure measuring port.

4. The hydraulic control brake valve group according to claim 1, characterized in that There are two pressure inlet ports (12).

5. The hydraulic control brake valve group according to claim 4, characterized in that It further includes a shuttle valve (5), which is arranged on the valve block (1). The shuttle valve (5) has two inlet ports and one outlet port; The two inlet ports are respectively communicated with the two pressure inlet ports (12) of the valve block (1), and the outlet port is communicated with the inlet port of the pressure reducing valve (3).

6. The hydraulic control brake valve group according to claim 1, characterized in that The valve block (1) is provided with a plurality of mounting holes (15), and the mounting holes (15) are adapted to fix the valve block (1).

7. The hydraulic control brake valve group according to claim 1, characterized in that The set pressure reducing output value of the pressure reducing valve (3) is 40 bar.

8. The hydraulic control brake valve group according to claim 1, characterized in that The preset switching pressure of the control port of the internally controlled sequence valve (2) is 25 bar.

9. The hydraulic control brake valve group according to claim 1, characterized in that The surface of the valve block (1) is galvanized.

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