Liquid-filled braking and flushing valve group applied to engineering vehicle

Abstract

The invention provides a hydraulic braking and flushing valve group applied to an engineering vehicle, and particularly relates to the technical field of engineering vehicle equipment. The first oil port is formed in the valve block, is connected with external hydraulic oil and is used for conveying the hydraulic oil into the valve block; the second oil port is formed in the valve block, and an energy accumulator is connected to the second oil port; the throttle valve is arranged on the valve block, is connected with the energy accumulator and is used for releasing the pressure of the energy accumulator; the braking system is connected with the energy accumulator; the reversing valve is arranged on the valve block, and the reversing valve is connected with the braking system; the proportional flow valve is arranged on the valve block, one end of the proportional flow valve is connected with the first oil port, and the other end of the proportional flow valve is connected with an external part to be flushed. According to the valve set, the braking function and the flushing function are combined, and the valve set is simple in structure, low in cost, high in system integration degree and small in pressure loss.

Description

Technical Field

[0001] The present application relates to the technical field of engineering vehicle equipment, and in particular to a liquid-filled brake and flushing valve group applied to engineering vehicles. Background Art

[0002] The accumulator charging valve and flushing valve group of the hydraulic power brake system of current engineering machinery are independent of each other, and the two systems use different hydraulic pumps. However, the accumulator charging valve of the hydraulic power brake system works intermittently during the operation of the whole machine, and the hydraulic pump in the system is not fully utilized, wasting energy. Moreover, the two systems are independent, which undoubtedly increases the number of components, increases costs, and complicates the system layout and pipeline connections. In view of this, the present application provides a charging brake and flushing valve group for engineering vehicles that has a simple structure and combines flushing and braking functions. Summary of the invention

[0003] In order to solve the above technical problems, the present application provides a liquid-filled brake and flushing valve group for engineering vehicles which has a simple structure and combines flushing and braking functions, and includes:

[0004] Valve block;

[0005] A first oil port, which is arranged on the valve block and connected to external hydraulic oil for conveying hydraulic oil into the valve block;

[0006] A second oil port, wherein the second oil port is arranged on the valve block and an accumulator is connected to the second oil port;

[0007] A throttle valve, which is arranged on the valve block and connected to the accumulator for releasing the pressure of the accumulator;

[0008] a braking system connected to the accumulator;

[0009] A reversing valve, wherein the reversing valve is arranged on the valve block and connected to the braking system;

[0010] A proportional flow valve is arranged on the valve block, one end of the proportional flow valve is connected to the first oil port, and the other end of the proportional flow valve is connected to the external component to be flushed.

[0011] In some embodiments, a first one-way valve is further included, wherein a feed end of the first one-way valve is connected to a discharge end of the first oil port, and a discharge end of the first one-way valve is connected to a feed end of the accumulator.

[0012] In some embodiments, a first overflow valve is further included, wherein a feed end of the first overflow valve is connected to a discharge end of the accumulator, and a discharge end of the first overflow valve is connected to a braking system.

[0013] In some embodiments, it further includes a throttle plug, which is connected to the throttle valve for controlling the pressure relief pressure of the accumulator.

[0014] In some embodiments, it further includes a second check valve, which is arranged in the reversing valve for controlling the pressure of the braking system.

[0015] In some embodiments, it further includes a second overflow valve, the feed end of which is connected to the discharge end of the proportional flow valve, and the discharge end of the second overflow valve is connected to the feed end of the proportional flow valve.

[0016] In some embodiments, it further includes a first pressure measuring port arranged on the valve block, which is located between the accumulator and the first check valve, and a first pressure measuring joint for installing an external pressure measuring instrument is connected to the first pressure measuring port, and the pressure of the accumulator is monitored in real time based on the external pressure measuring instrument on the first pressure measuring joint.

[0017] In some embodiments, it further includes a second pressure measuring port arranged on the valve block, and a second pressure measuring joint for installing an external pressure measuring instrument to monitor the braking pressure of the braking system in real time is connected to the second pressure measuring port.

[0018] Compared with the prior art, the filling liquid braking and flushing valve group applied to engineering vehicles provided by the present application realizes the effective combination of the braking function and the flushing function. Since the valve group shares some workpiece resources, the total number of components is reduced, the production cost is lowered, the system integration degree is high, the pressure loss is small, and it has the characteristics of simple structure, low cost and good pressure maintaining ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the following embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing some embodiments and are not considered as a limitation to the present application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0020] Figure 1 The structural schematic diagram of the filling liquid braking and flushing valve group applied to engineering vehicles in the present application is shown,

[0021] Figure 2 The working principle diagram of the filling liquid braking and flushing valve group applied to engineering vehicles in the present application is shown.

[0022] The reference numerals in the specific embodiments are as follows:

[0023] 1. Valve block, 2. First oil port, 3. Second oil port, 4. Throttle valve, 5. Reversing valve, 6. Proportional flow valve, 7. First check valve, 8. First overflow valve, 9. Throttle plug, 10. First pressure measuring joint. Detailed implementation manners

[0024] In the description of the present application, it should be understood that when terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are used to indicate the orientation or positional relationship, without special instructions, it is understood as the orientation or positional relationship based on the drawings shown. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. Taking Figure 1 as an example, upward perpendicular to the paper surface is the upper, downward perpendicular to the paper surface is the lower, left perpendicular to the paper surface is the left, right perpendicular to the paper surface is the right, front perpendicular to the paper surface is the inner, and rear perpendicular to the paper surface is the outer.

[0025] In addition, features limited by "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Features limited by "first" and "second" may explicitly or implicitly include at least one of the limited features. When the description "a plurality of" appears, the general meaning is at least including two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0026] In the present application, unless otherwise clearly specified and limited, when terms such as "installed", "connected", "connected to", "fixed" are used, they should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0027] In the description of this specification, when terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples.

[0028] It should be noted that in Figure 2 , the Ms port is the first pressure measurement port, to which the first pressure measurement joint 10 is connected, the S1 port is connected to the service brake system, the second oil port 3 is connected to the accumulator, the A port is connected to the parking brake, and the Ma port is the second pressure measurement port, to which the second pressure measurement joint is connected.

[0029] Please refer to Figure 1 - Figure 2 As shown, a charge liquid braking and flushing valve group applied to an engineering vehicle provided by an embodiment of the present application includes:

[0030] A valve block 1;

[0031] A first oil port 2, which is arranged on the valve block 1 and connected to external hydraulic oil for delivering the hydraulic oil into the valve block 1;

[0032] A second oil port 3, which is arranged on the valve block 1, and a accumulator (not shown in the figure) is connected to the second oil port 3;

[0033] A throttle valve 4, which is arranged on the valve block 1 and connected to the accumulator for releasing the pressure of the accumulator;

[0034] A brake system, which is connected to the accumulator;

[0035] A reversing valve 5, which is arranged on the valve block 1, and the reversing valve 5 is connected to the brake system;

[0036] A proportional flow valve 6, which is arranged on the valve block 1, one end of the proportional flow valve 6 is connected to the first oil port 2, and the other end of the proportional flow valve 6 is connected to an external component to be flushed.

[0037] In the above embodiment, when the engineering vehicle is running, the reversing valve 5 can be used to control the opening or closing of the vehicle parking; when the instantaneous pressure of the automatic system increases, the external hydraulic oil can enter the valve block 1 from the first oil port 2 and charge the accumulator through the second oil port 3, thereby ensuring the normal pressure of the entire valve group system; when the automatic system needs pressure, the hydraulic oil in the accumulator is released to the brake system through the throttle valve 4, realizing the release of the pressure in the accumulator and ensuring the normal pressure of the brake system; at the same time, when the braking pressure in the brake system is sufficient, the excess hydraulic oil in the first oil port 2 can also be supplied to an external component to be flushed (such as an axle) through the proportional flow valve 6 for flushing. Therefore, the valve group realizes the effective combination of the braking function and the flushing function. Since the valve group shares some workpiece resources, the total number of components is reduced, the production cost is lowered, the system integration degree is high, the pressure loss is small, and it has the characteristics of simple structure, low cost and good pressure maintaining ability.

[0038] In some embodiments, a first one-way valve 7 is further included. The feed end of the first one-way valve 7 is connected to the discharge end of the first oil port 2, and the discharge end of the first one-way valve 7 is connected to the feed end of the accumulator.

[0039] In the above embodiment, based on the first one-way valve 7, it is ensured that the external hydraulic oil can only flow from the first oil port 2 to the accumulator, effectively preventing its backflow, and thus ensuring the normal operation of the entire system.

[0040] In some embodiments, a first overflow valve 8 is further included. The feed end of the first overflow valve 8 is connected to the discharge end of the accumulator, and the discharge end of the first overflow valve 8 is connected to the braking system.

[0041] In the above embodiment, based on the first overflow valve 8, the pressure of the braking system can be limited to ensure the stability of the braking pressure.

[0042] In some embodiments, a throttle plug 9 is further included. The throttle plug 9 is connected to the throttle valve 4 for controlling the pressure relief pressure of the accumulator.

[0043] In the above embodiment, based on the throttle plug 9, the pressure relief pressure of the accumulator is buffered, thereby preventing the sudden drop of the pressure relief pressure of the accumulator and ensuring the stability of the pressure relief process.

[0044] In some embodiments, a second one-way valve (not shown in the figure) is further included. The second one-way valve is arranged in the reversing valve 5 for controlling the pressure of the braking system.

[0045] In the above embodiment, based on the second one-way valve, the normal flow direction of the hydraulic oil inside the reversing valve 5 is ensured, and thus the braking circuit can be effectively pressure-maintained.

[0046] In some embodiments, a second overflow valve (not shown in the figure) is further included. The feed end of the second overflow valve is connected to the discharge end of the proportional flow valve 6, and the discharge end of the second overflow valve is connected to the feed end of the proportional flow valve 6.

[0047] In the above embodiment, based on the second overflow valve, the maximum pressure of the flushing circuit can be effectively limited, greatly improving the safety of the flushing operation.

[0048] In some embodiments, a first pressure measuring port is further included on the valve block 1. The first pressure measuring port is located between the accumulator and the first one-way valve, and a first pressure measuring joint 10 for installing an external pressure measuring instrument is connected to the first pressure measuring port. Based on the external pressure measuring instrument on the first pressure measuring joint 10, the pressure of the accumulator is monitored in real time.

[0049] In the above embodiments, by providing the first pressure measurement port for installing the first pressure measurement joint 10, the pressure of the accumulator can be effectively monitored in real time based on the external pressure measurement provided on the first pressure measurement joint 10, ensuring the safe operation of the accumulator.

[0050] In some embodiments, it further includes a second pressure measurement port provided on the valve block, and a second pressure measurement joint for installing an external pressure measurement instrument to monitor the braking pressure of the braking system in real time is connected to the second pressure measurement port.

[0051] In the above embodiments, by providing the second pressure measurement port for installing the second pressure measurement joint, the pressure of the braking system can be monitored in real time based on the external pressure measurement instrument provided on the second pressure measurement joint, ensuring the normal operation of the braking system.

[0052] The above has introduced in detail a charge liquid braking and flushing valve group applied to engineering vehicles provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the core idea of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A liquid-filled brake and flushing valve group for engineering vehicles, characterized in that: include: Valve block (1); A first oil port (2), the first oil port (2) being arranged on the valve block (1) and connected to external hydraulic oil for conveying the hydraulic oil into the valve block (1); A second oil port (3), the second oil port (3) being arranged on the valve block (1), and the second oil port (3) being connected to an accumulator; A throttle valve (4), the throttle valve (4) being arranged on the valve block (1) and connected to the accumulator for releasing the pressure of the accumulator; a braking system connected to the accumulator; A reversing valve (5), wherein the reversing valve (5) is arranged on the valve block (1), and the reversing valve (5) is connected to the braking system; A proportional flow valve (6) is arranged on the valve block (1), one end of the proportional flow valve (6) is connected to the first oil port (2), and the other end of the proportional flow valve (6) is connected to an external component to be flushed.

2. The liquid-filled brake and flushing valve assembly for engineering vehicles according to claim 1, characterized in that: It also comprises a first one-way valve (7), wherein the feed end of the first one-way valve (7) is connected to the discharge end of the first oil port (2), and the discharge end of the first one-way valve (7) is connected to the feed end of the accumulator.

3. The liquid-filled brake and flushing valve group for engineering vehicles according to claim 2, characterized in that: It also comprises a first overflow valve (8), wherein the feed end of the first overflow valve (8) is connected to the discharge end of the accumulator, and the discharge end of the first overflow valve (8) is connected to the braking system.

4. The liquid-filled brake and flushing valve assembly for engineering vehicles according to claim 3, characterized in that: It also comprises a throttle plug (9), which is connected to the throttle valve (4) and is used to control the pressure relief pressure of the accumulator.

5. The liquid-filled brake and flushing valve assembly for engineering vehicles according to claim 4, characterized in that: It also includes a second one-way valve, which is arranged in the reversing valve (5) and is used to control the pressure of the braking system.

6. The liquid-filled brake and flushing valve assembly for engineering vehicles according to claim 5, characterized in that: It also includes a second overflow valve, the feed end of the second overflow valve is connected to the discharge end of the proportional flow valve (6), and the discharge end of the second overflow valve is connected to the feed end of the proportional flow valve (6).

7. The liquid-filled brake and flushing valve assembly for engineering vehicles according to claim 6, characterized in that: The invention also comprises a first pressure measuring port arranged on the valve block (1), the first pressure measuring port being located between the accumulator and the first one-way valve, and a first pressure measuring joint (10) for installing an external pressure measuring instrument being connected to the first pressure measuring port, and the pressure of the accumulator is monitored in real time based on the external pressure measuring instrument on the first pressure measuring joint (10).

8. The liquid-filled brake and flushing valve assembly for engineering vehicles according to claim 7, characterized in that: It also includes a second pressure measuring port arranged on the valve block, and the second pressure measuring port is connected to a second pressure measuring joint for installing an external pressure measuring instrument to monitor the brake pressure of the brake system in real time.

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