Integrated hydraulic valve and hydraulic control system

Abstract

The utility model relates to the technical field of hydraulic transmission, and provides an integrated hydraulic valve and a hydraulic control system, the integrated hydraulic valve comprises an integrated valve body, multiple valve cavities are arranged in the integrated valve body, the multiple valve cavities are communicated through at least one main oil duct, each valve cavity is oppositely provided with two working oil ports, and the working oil ports are communicated with the main oil duct. The two working oil ports are respectively communicated with the oil cylinder and the actuating mechanism; the two ends of the integrated valve body in the length direction are provided with an oil inlet pressure measuring opening and an oil return pressure measuring opening correspondingly, and the two sides of the integrated valve body are oppositely provided with a plurality of first installation holes used for installing control handles and a plurality of second installation holes used for installing first end covers correspondingly. A safety valve mounting hole and an oil discharge valve mounting hole are oppositely formed in the two sides, close to the oil inlet pressure measuring opening, of the integrated valve body respectively. By adopting the integrated valve body structure, the split assembly structure of the traditional transmission multi-gang valve is changed, and the integrated transmission multi-gang valve has the characteristics of compact structure and light weight.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic transmission, in particular to an integrated hydraulic valve and a hydraulic control system. Background Art

[0002] A hydraulic system is a system that uses oil as the working medium, utilizes the pressure energy of the oil, and drives the hydraulic actuators through control valves and other components.

[0003] The function of the hydraulic system is to increase the force by changing the pressure. A complete hydraulic system consists of five parts, namely power elements, actuators, control elements, auxiliary elements and hydraulic oil. Hydraulic systems can be divided into two categories: hydraulic transmission systems and hydraulic control systems. The hydraulic transmission system mainly transmits power and motion, while the hydraulic control system ensures that the output of the hydraulic system meets specific performance requirements (especially dynamic performance).

[0004] A hydraulic valve is a device installed between the hydraulic pump of the power unit of the entire hydraulic system and actuators including cylinders and motors to control the individual or linked actions of the actuators. Currently, most hydraulic valves are segmented structures, and when used, multi-valve multi-transmission is required, which results in heavy equipment weight, large space occupation, and a non-compact structure. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides an integrated hydraulic valve and a hydraulic control system, which changes the traditional multi-valve segmented assembly structure by adopting an integrated valve body structure, and has the characteristics of compact structure and light weight.

[0006] In order to solve the above technical problems, the technical solution of the utility model is:

[0007] An integrated hydraulic valve comprises an integrated valve body, wherein a plurality of valve chambers are arranged in the integrated valve body, wherein the plurality of valve chambers are connected through at least one main oil passage, and each of the valve chambers is provided with two working oil ports, wherein the two working oil ports are connected to the oil cylinder and the actuator respectively;

[0008] The integrated valve body is provided with an oil inlet pressure measuring port for detecting the oil inlet pressure value and an oil return pressure measuring port for detecting the oil return pressure value at both ends along the length direction, and a plurality of first mounting holes for installing a control handle and a second mounting hole for installing a first end cover are provided oppositely on both sides of the integrated valve body, and a safety valve mounting hole and an oil unloading valve mounting hole are provided oppositely on both sides of the integrated valve body and close to the oil inlet pressure measuring port.

[0009] As an improved technical solution, an oil unloading passage is further provided on the integrated valve body and near the oil inlet pressure measuring port, the oil unloading passage is connected to the oil unloading valve mounting hole, and a process screw plug and a throttling screw plug are installed on the oil unloading passage.

[0010] As an improved technical solution, a plurality of support blocks are further provided at the bottom of the integrated valve body, and threaded holes for connection and fixation are respectively provided on the plurality of support blocks.

[0011] A hydraulic control system, comprising the integrated hydraulic valve, wherein a plurality of ball handles and a single handle are installed on one side of the integrated hydraulic valve, and a plurality of first end covers for supporting the valve core spring to return are arranged on the other side, wherein the first end covers are respectively arranged corresponding to the ball handle and the single handle;

[0012] An oil inlet joint and an oil return joint are also installed on the integrated hydraulic valve. A safety valve assembly and an oil unloading valve assembly are installed on the integrated hydraulic valve and close to the oil inlet joint. The safety valve assembly and the oil unloading valve assembly are arranged correspondingly. The safety valve assembly is installed in the safety valve mounting hole, and the oil unloading valve assembly is installed in the oil unloading valve mounting hole.

[0013] As an improved technical solution, the oil unloading valve assembly includes an oil unloading one-way valve, a return spring and a plug. The oil unloading one-way valve is movably installed in the oil unloading valve mounting hole, the plug is threadedly installed on the oil unloading valve mounting hole, and the return spring is clamped between the oil unloading one-way valve and the plug.

[0014] As an improved technical solution, the oil unloading one-way valve is provided with an oil sealing portion in a pointed structure at one end away from the return spring, an oil passing groove is provided in the installation hole of the oil unloading valve, and a first sealing ring is provided between the oil passing groove and the oil sealing portion;

[0015] The oil sealing portion is provided with a communicating hole, and the communicating hole is connected with the oil passage groove and a through hole arranged inside the oil unloading one-way valve.

[0016] As an improved technical solution, a plurality of sealing ring installation grooves are provided on the outer side wall of the oil unloading one-way valve, and a second sealing ring is installed in the sealing ring installation groove;

[0017] A groove is provided at one end of the plug close to the return spring, and the return spring is arranged between the groove and the through hole.

[0018] As an improved technical solution, the safety valve assembly adopts a pilot-operated overflow valve.

[0019] After adopting the above technical solution, the beneficial effects of the utility model are:

[0020] An integrated valve body is provided, in which multiple valve chambers are arranged, which are connected by at least one main oil passage, and each valve chamber is provided with two working oil ports, which are connected to the oil cylinder and the actuator respectively. By integrating the multiple valve chambers on the integrated valve body and connecting them by at least one main oil passage, the structure of the traditional multi-valve transmission segmented assembly is changed, and the structure is more compact, the weight is lighter, the design is exquisite, and the layout is more reasonable;

[0021] The one-piece valve body is provided with an oil inlet pressure measuring port for detecting the oil inlet pressure value and an oil return pressure measuring port for detecting the oil return pressure value at both ends along the length direction respectively. A plurality of first mounting holes for installing a control handle and a second mounting hole for installing a first end cover are provided oppositely on both sides of the one-piece valve body respectively. A safety valve mounting hole and an oil unloading valve mounting hole are provided oppositely on both sides of the one-piece valve body and close to the oil inlet pressure measuring port respectively. The control handle can be installed through the first mounting hole. Through the design structure of the multi-valve cavity of the one-piece valve body, the control handle can realize a single action or two or more compound actions. The structure is simple and the operation is convenient. By providing the safety valve mounting hole and the oil unloading valve mounting hole oppositely on both sides of the one-piece valve body and close to the oil inlet pressure measuring port respectively, and by arranging the oil unloading valve mounting hole at a position close to the oil inlet pressure measuring port, the pressure loss and energy loss in the process of oil flow interruption are reduced, and the negative effects such as local heating and overheating of the valve body are avoided.

[0022] In summary, the utility model provides an integrated hydraulic valve and a hydraulic control system, which changes the structure of the traditional multi-valve transmission segmented assembly by adopting an integrated valve body structure, and has the characteristics of compact structure and light weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In addition, in the drawings, the components or parts are not necessarily drawn according to the actual scale.

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the utility model from another angle;

[0026] Figure 3 for Figure 1 A schematic diagram of the structure from a top view;

[0027] Figure 4 for Figure 1 A schematic diagram of a side view of the structure;

[0028] Figure 5 It is a cross-sectional structural schematic diagram of the oil unloading valve assembly of the utility model;

[0029] Figure 6 for Figure 5 The enlarged structural diagram at A in the middle;

[0030] Figure 7 It is a schematic cross-sectional structure diagram of a single-valve chamber in the utility model;

[0031] Figure 8 It is a cross-sectional structural schematic diagram of the multi-valve chamber in the utility model;

[0032] Reference numerals:

[0033] 1. Integrated valve body, 2. Valve chamber, 3. Main oil channel, 4. Working oil port, 5. Oil inlet pressure measuring port, 6. Oil return pressure measuring port, 7. Oil unloading channel, 8. Process screw plug, 9. Throttle screw plug, 10. Support block, 11. Ball handle, 12. Single handle, 13. First end cover, 14. Safety valve assembly, 15. Oil unloading valve assembly, 1501. Oil unloading check valve, 1502. Reset spring, 1503. Plug, 1504. Oil sealing part, 1505. Oil groove, 1506. First sealing ring, 1507. Connecting hole, 1508. Through hole, 1509. Second sealing ring, 1510. Groove, 16. First mounting hole, 17. Second mounting hole. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0037] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0038] like Figure 1-Figure 8 As shown, the integrated hydraulic valve comprises an integrated valve body 1, in which multiple valve chambers 2 are arranged, and the multiple valve chambers 2 are connected through at least one main oil channel 3, and each valve chamber 2 is provided with two working oil ports 4, which are connected to the oil cylinder and the actuator respectively. By integrating the multiple valve chambers 2 on the integrated valve body 1 and connecting them through at least one main oil channel 3, the structure of the traditional transmission multiple valve segmented assembly is changed, and the structure is more compact, the weight is lighter, the design is exquisite, and the layout is more reasonable;

[0039] The integrated valve body 1 is provided with an oil inlet pressure measuring port 5 for detecting the oil inlet pressure value and an oil return pressure measuring port 6 for detecting the oil return pressure value at both ends along the length direction, and a plurality of first mounting holes 16 for installing a control handle and a second mounting hole 17 for installing a first end cover 13 are provided on both sides of the integrated valve body 1 respectively. Safety valve mounting holes and oil unloading valve mounting holes are provided on both sides of the integrated valve body 1 and close to the oil inlet pressure measuring port 5 respectively. The control handle can be installed through the first mounting holes 16. Through the design structure of the multi-valve cavity 2 of the integrated valve body 1, the control handle can realize a single action or two or more compound actions, with a simple structure and convenient operation. By providing the safety valve mounting holes and the oil unloading valve mounting holes on both sides of the integrated valve body 1 and close to the oil inlet pressure measuring port 5 respectively, and by arranging the oil unloading valve mounting holes at a position close to the oil inlet pressure measuring port 5, the pressure loss and energy loss in the process of oil flow interruption are reduced, and negative effects such as local heating and overheating of the valve body are avoided.

[0040] like Figure 1 and Figure 5 As shown, an oil unloading passage 7 is also provided on the integrated valve body 1 and near the oil inlet pressure measuring port 5. The oil unloading passage 7 is connected to the oil unloading valve mounting hole. A process screw plug 8 and a throttling screw plug 9 are installed on the oil unloading passage 7. The outlet of the oil unloading passage 7 that does not need to be connected is closed by the process screw plug 8 to avoid oil leakage.

[0041] like Figure 2As shown, a plurality of support blocks 10 are further provided at the bottom of the integrated valve body 1, and threaded holes for connection and fixation are respectively provided on the plurality of support blocks 10. The support blocks 10 and the threaded holes are provided to facilitate installation and fixation of the integrated valve body 1.

[0042] like Figure 1-Figure 8 As shown, a hydraulic control system includes an integrated hydraulic valve, and a plurality of ball handles 11 and a single handle 12 are installed on one side of the integrated hydraulic valve. The ball handle 11 and the single handle 12 are respectively installed in the first installation hole 16. The push and pull action of the ball handle 11 can realize the oil inlet and return of the two working oil ports 4 in the valve chamber 2, thereby realizing the action between the actuators such as the oil cylinder and the motor. The two valve stems are connected by the single handle 12, and the two valve stems are respectively connected to the two valve chambers 2, thereby realizing the linkage control of the actuators of the two valve chambers 2. A plurality of first end covers 13 for supporting the valve core spring reset are arranged on the other side, and the first end covers 13 are respectively arranged corresponding to the ball handle 11 and the single handle 12;

[0043] The integrated hydraulic valve is also equipped with an oil inlet joint and an oil return joint. The oil inlet joint is connected to the oil inlet pressure measuring port 5, and the oil return joint is connected to the oil return pressure measuring port 6. A safety valve assembly 14 and an oil unloading valve assembly 15 are installed on the integrated hydraulic valve and near the oil inlet joint. The safety valve assembly 14 and the oil unloading valve assembly 15 are arranged correspondingly. The safety valve assembly 14 is installed in the safety valve mounting hole, and the oil unloading valve assembly 15 is installed in the oil unloading valve mounting hole.

[0044] like Figure 5 As shown, the oil unloading valve assembly 15 includes an oil unloading one-way valve 1501, a return spring 1502 and a plug 1503. The oil unloading one-way valve 1501 is movably installed in the oil unloading valve mounting hole, the plug 1503 is threadedly installed on the oil unloading valve mounting hole, and the return spring 1502 is clamped between the oil unloading one-way valve 1501 and the plug 1503. The return spring 1502 can provide a return force for the oil unloading one-way valve 1501, and the force of the return spring 1502 on the oil unloading one-way valve 1501 can be adjusted through the plug 1503.

[0045] like Figure 6 As shown, an oil sealing portion 1504 with a pointed structure is provided at one end of the oil unloading check valve 1501 away from the return spring 1502, an oil passing groove 1505 is provided in the oil unloading valve mounting hole, and a first sealing ring 1506 is provided between the oil passing groove 1505 and the oil sealing portion 1504. The oil unloading valve mounting hole is sealed by the oil sealing portion 1504 and the first sealing ring 1506, so that the working oil port 4 can build up pressure, so that it can work normally and provide a stable working oil pressure for the actuator;

[0046] A connecting hole 1507 is provided on the oil sealing part 1504, and the connecting hole 1507 is connected to the oil groove 1505 and the through hole 1508 set inside the oil unloading one-way valve 1501. Through the connecting hole 1507 set on the oil sealing part 1504, when it is not in working state, the oil unloading one-way valve 1501 is opened, and the hydraulic oil enters into the through hole 1508 inside the oil unloading one-way valve 1501 through the oil groove 1505 and the connecting hole 1507, and is connected to the oil unloading valve mounting hole through the through hole 1508. Since the oil unloading valve mounting hole is connected to the oil unloading passage 7, oil unloading and pressure relief are realized.

[0047] like Figure 5 As shown, a plurality of sealing ring installation grooves are provided on the outer wall of the oil unloading one-way valve 1501, and a second sealing ring 1509 is installed in the sealing ring installation groove. The second sealing ring 1509 is provided to achieve sealing between the oil unloading one-way valve 1501 and the oil unloading valve installation hole;

[0048] A groove 1510 is provided at one end of the plug 1503 close to the return spring 1502 , and the return spring 1502 is arranged between the groove 1510 and the through hole 1508 . By providing the groove 1510 on the plug 1503 , it is convenient to position the end of the return spring 1502 .

[0049] like Figure 1-Figure 3 and Figure 5 As shown, the safety valve assembly 14 adopts a pilot-operated relief valve, which has the characteristics of good opening and closing characteristics, low noise, and small pressure shock.

[0050] For ease of understanding, the working process of this embodiment is given below:

[0051] like Figure 1-Figure 8 As shown, multiple valve chambers 2 are arranged in an integrated valve body 1, and the multiple valve chambers 2 are connected through at least one main oil channel 3. Two working oil ports 4 are arranged on each valve chamber 2, and the two working oil ports 4 are connected to the oil cylinder and the actuator respectively. The circulation of hydraulic oil is controlled to control the actuator to act individually or in conjunction with each other;

[0052] When the integrated hydraulic valve is in working state, the oil unloading check valve 1501 is in closed state, and the working oil port 4 is pressurized. At this time, it can work normally and provide stable working oil pressure for the actuators such as the cylinder and motor of the excavator;

[0053] When the integrated hydraulic valve is in a non-working state, the oil unloading check valve 1501 is in an open state, the working oil port 4 is depressurized, and the actuator stops moving or is in a floating state to better protect the actuator from damage under external force impact.

[0054] In summary, the utility model provides an integrated hydraulic valve and a hydraulic control system, which changes the traditional multi-valve segmented assembly structure by adopting an integrated valve body structure, and has the characteristics of compact structure and light weight.

[0055] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. Integrated hydraulic valve, characterized by: It comprises an integrated valve body, wherein a plurality of valve chambers are arranged in the integrated valve body, the plurality of valve chambers are connected through at least one main oil passage, and each of the valve chambers is provided with two working oil ports, which are respectively connected to the oil cylinder and the actuator; The integrated valve body is provided with an oil inlet pressure measuring port for detecting the oil inlet pressure value and an oil return pressure measuring port for detecting the oil return pressure value at both ends along the length direction, and a plurality of first mounting holes for installing a control handle and a second mounting hole for installing a first end cover are provided oppositely on both sides of the integrated valve body, and a safety valve mounting hole and an oil unloading valve mounting hole are provided oppositely on both sides of the integrated valve body and close to the oil inlet pressure measuring port.

2. The integrated hydraulic valve according to claim 1, characterized in that: An oil unloading passage is also provided on the integrated valve body and near the oil inlet pressure measuring port. The oil unloading passage is connected to the oil unloading valve mounting hole. A process screw plug and a throttling screw plug are installed on the oil unloading passage.

3. The integrated hydraulic valve according to claim 1, characterized in that: A plurality of support blocks are also provided at the bottom of the integrated valve body, and threaded holes for connection and fixing are respectively provided on the plurality of support blocks.

4. A hydraulic control system, characterized in that: The hydraulic control system comprises the integrated hydraulic valve according to claim 1, wherein a plurality of ball handles and a single handle are installed on one side of the integrated hydraulic valve, and a plurality of first end covers for supporting the valve core spring to return are arranged on the other side, and the first end covers are respectively arranged corresponding to the ball handle and the single handle; An oil inlet joint and an oil return joint are also installed on the integrated hydraulic valve. A safety valve assembly and an oil unloading valve assembly are installed on the integrated hydraulic valve and close to the oil inlet joint. The safety valve assembly and the oil unloading valve assembly are arranged correspondingly. The safety valve assembly is installed in the safety valve mounting hole, and the oil unloading valve assembly is installed in the oil unloading valve mounting hole.

5. A hydraulic control system according to claim 4, characterized in that: The oil unloading valve assembly includes an oil unloading one-way valve, a return spring and a plug. The oil unloading one-way valve is movably installed in the oil unloading valve mounting hole, the plug is threadedly installed on the oil unloading valve mounting hole, and the return spring is clamped between the oil unloading one-way valve and the plug.

6. A hydraulic control system according to claim 5, characterized in that: The oil unloading one-way valve is provided with an oil sealing portion in a pointed structure at one end away from the return spring, an oil passage groove is provided in the installation hole of the oil unloading valve, and a first sealing ring is provided between the oil passage groove and the oil sealing portion; The oil sealing portion is provided with a communicating hole, and the communicating hole is connected with the oil passage groove and a through hole arranged inside the oil unloading one-way valve.

7. A hydraulic control system according to claim 6, characterized in that: A plurality of sealing ring installation grooves are provided on the outer side wall of the oil unloading one-way valve, and a second sealing ring is installed in the sealing ring installation groove; A groove is provided at one end of the plug close to the return spring, and the return spring is arranged between the groove and the through hole.

8. A hydraulic control system according to claim 4, characterized in that: The safety valve assembly adopts a pilot-operated overflow valve.

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