Double-pump confluence scheme

Abstract

The utility model relates to the technical field of hydraulic multi-way valves, in particular to a downstream system double-pump confluence scheme which comprises a valve T port, the valve T port is connected with a speed regulating valve through a pipeline, the outer wall of the speed regulating valve is connected with a connecting pump through a pipeline, and a three-way flow valve and an LS overflow valve are connected between the valve T port and the connecting pump through pipelines. The connecting pump is sequentially connected with a first connecting working piece, a second connecting working piece, a third connecting working piece and a fourth connecting working piece from left to right through pipelines, and the first connecting working piece, the second connecting working piece, the third connecting working piece and the fourth connecting working piece are all connected with compensation valve elements through pipelines. By designing a double-pump confluence scheme, the reversing valve element, the shuttle valve and the pressure reducing valve in the device are used for controlling, and the problems that according to an existing double-pump confluence scheme, an oil way structure is complex, electric proportional control cannot be conducted, and manufacturability is poor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic multi-way valves, in particular to a double-pump confluence solution. Background Art

[0002] Proportional valves are increasingly used in the hydraulic systems of truck-mounted cranes, and dual-pump merging is also used on cranes. In the past, the oil circuit structure of the dual-pump merging solution was relatively complex, and electrical proportional control could not be performed, resulting in poor manufacturability.

[0003] Therefore, a dual-pump merging solution is needed to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a dual-pump merging solution to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A dual-pump confluence solution includes a valve T port, the valve T port is connected to a speed regulating valve through a pipeline, the outer wall of the speed regulating valve is connected to a connecting pump through a pipeline, a three-way flow valve and an LS relief valve are connected between the valve T port and the connecting pump through a pipeline, the connecting pump is sequentially connected to a first joint working piece, a second joint working piece, a third joint working piece, and a fourth joint working piece from left to right through a pipeline, the first joint working piece, the second joint working piece, the third joint working piece, and the fourth joint working piece are all connected to a compensation valve core through a pipeline, the connecting pump is connected to a reversing valve core through a pipeline and on the right side of the third joint working piece, and the reversing valve core is connected to the third joint working piece through a pipeline. The shuttle valve is connected to the first working piece, the second working piece, the third working piece and the fourth working piece are connected together through a pipeline, and the first non-return valve and the second non-return valve are respectively installed between the second working piece and the third working piece and between the third working piece and the fourth working piece in the pipeline. The connecting pump is provided with a third non-return valve on the right side of the reversing valve core through a pipeline, a secondary relief valve is connected between the valve T port and the connecting pump through a pipeline, and a plug is connected to the pipeline between the valve T port and the connecting pump and near the secondary relief valve.

[0007] As a preferred solution of the utility model, the first one-way valve and the third one-way valve only allow the hydraulic oil to flow from right to left, and the second one-way valve only allows the hydraulic oil to flow from left to right.

[0008] As a preferred solution of the utility model, the speed regulating valve, the three-way flow valve and the LS overflow valve are each provided with two groups, and the three-way flow valve and the LS overflow valve are connected through a pipeline.

[0009] As a preferred solution of the utility model, the first working piece, the second working piece, the third working piece and the fourth working piece are all composed of a valve body, a main valve core and a pilot proportional pressure reducing valve.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. In the utility model, a dual-pump confluence scheme is designed, and the reversing valve core, shuttle valve and pressure reducing valve in the device are used for control. When the third working piece is working, the LS oil passage of the third working piece builds up pressure, and the pressure signal is transmitted to the first working piece through the first one-way valve and the second one-way valve respectively. At the same time, the pressure signal will push the reversing valve core to reverse, and the oil of P2 in the connecting pump will be merged into the third working piece through the third one-way valve and the reversing valve core, thereby realizing the function of dual pump confluence. When the third working piece is no longer working, the LS signal oil pressure of the third working piece is released, and the reversing valve core is reset. The LS pressure of the third working piece is completely unloaded. The function of the first check valve and the second check valve is to prevent the high-pressure LS signal oil of other working pieces from interfering with the third working piece. The shuttle valve 3 can prevent the pressure reducing valve from obtaining oil from the other pump when one of the double pumps fails, thereby preventing the sudden failure of the whole valve function due to damage to a single pump. At the same time, the pressure reducing valve provides pilot signal oil for the electric control valve. The oil circuit structure is relatively simple, and electric proportional control can be performed. The manufacturability is further improved, which solves the problem that the oil circuit structure of the previous double pump confluence solution is relatively complex, electric proportional control cannot be performed, and the manufacturability is poor. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the hydraulic principle diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the first working piece of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the first one-way valve of the utility model.

[0015] In the figure: 1. valve T port; 2. speed control valve; 3. valve P port; 4. three-way flow valve; 5. LS relief valve; 6. first working piece; 7. second working piece; 8. third working piece; 9. fourth working piece; 10. compensation valve core; 11. reversing valve core; 12. shuttle valve; 13. pressure reducing valve; 14. first non-return valve; 15. second non-return valve; 16. third non-return valve; 17. secondary relief valve; 18. plug. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0017] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0018] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a central element. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0020] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0021] A dual-pump confluence solution includes a valve T port 1, the valve T port 1 is connected to a speed regulating valve 2 through a pipeline, the outer wall of the speed regulating valve 2 is connected to a valve P port 3 through a pipeline, a three-way flow valve 4 and an LS overflow valve 5 are connected between the valve T port 1 and the valve P port 3 through a pipeline, the connecting pump 3 is sequentially connected to a first joint working piece 6, a second joint working piece 7, a third joint working piece 8, and a fourth joint working piece 9 through a pipeline from left to right, the first joint working piece 6, the second joint working piece 7, the third joint working piece 8, and the fourth joint working piece 9 are all connected to a compensation valve core 10 through a pipeline, the valve P port 3 is connected to a reversing valve core 11 through a pipeline and on the right side of the third joint working piece 8, and the reversing valve core 11 is connected to a shuttle valve through a pipeline 12, the shuttle valve 12 is connected to a pressure reducing valve 13 through a pipeline and at a position far away from the reversing valve core 11, the first working piece 6, the second working piece 7, the third working piece 8, and the fourth working piece 9 are all connected together through a pipeline, and the pipeline is respectively installed with a first check valve 14 and a second check valve 15 between the second working piece 7 and the third working piece 8 and between the third working piece 8 and the fourth working piece 9, the valve P port 3 is passed through a pipeline and a third check valve 16 is arranged on the right side of the reversing valve core 11, a secondary relief valve 17 is connected between the valve T port 1 and the valve P port 3 through a pipeline, and a plug 18 is connected to the pipeline between the valve T port 1 and the valve P port 3 and at a position close to the secondary relief valve 17;

[0022] Among them, the first one-way valve 14 and the third one-way valve 16 only allow the hydraulic oil to flow from right to left, and the second one-way valve 15 only allows the hydraulic oil to flow from left to right. There are three groups of plugs 18, two groups of plugs 18 are arranged near the first working piece 6, and one group of plugs 18 is arranged near the second working piece 7. There are five groups of secondary relief valves 17, and one group of secondary relief valves 17 is arranged near the second working piece 7, and two groups of secondary relief valves 17 are arranged near the third working piece 8 and the fourth working piece 9 respectively. The secondary relief valve 17 is connected to the first working piece 6, the second working piece 7, the third working piece 8, and the fourth working piece 9 through pipelines, respectively. The speed regulating valve 2, the three-way flow valve 4 and the LS relief valve 5 are each provided with two groups, and the three-way flow valve 4 is connected to the LS relief valve 5 through a pipeline. The first working piece 6, The second working piece 7, the third working piece 8 and the fourth working piece 9 are all composed of a valve body, a main valve core and a pilot proportional pressure reducing valve. When the third working piece 8 is working, pressure is established in the LS oil channel of the third working piece 8, and the pressure signal is transmitted to the first working piece 6 through the first one-way valve 14 and the second one-way valve 15 respectively. At the same time, the pressure signal will push the reversing valve core 11 to change direction, and the oil of P2 in the connecting pump 3 will be merged into the third working piece 8 through the third one-way valve 16 and the reversing valve core 11, thereby realizing the function of double pump confluence. When the third working piece 8 is no longer working, the LS signal oil pressure of the third working piece 8 is released, the reversing valve core 11 is reset, and the LS pressure of the third working piece 8 is completely unloaded. The function of the first one-way valve 14 and the second one-way valve 15 is to prevent the high-pressure LS signal oil of other working pieces from interfering with the third working piece 8.

[0023] The working process of the utility model: when the dual-pump confluence scheme designed by the present invention is in operation, the third working piece 8 works, and the LS oil passage of the third working piece 8 builds up pressure. The pressure signal is transmitted to the first working piece 6 through the first one-way valve 14 and the second one-way valve 15 respectively. At the same time, the pressure signal will push the reversing valve core 11 to reverse, and the oil of P2 in the connecting pump 3 will be merged into the third working piece 8 through the third one-way valve 16 and the reversing valve core 11, thereby realizing the function of dual-pump confluence. When the third working piece 8 is no longer During operation, the LS signal oil pressure of the third working piece 8 is released, the reversing valve core 11 is reset, and the LS pressure of the third working piece 8 is completely unloaded. The function of the first one-way valve 14 and the second one-way valve 15 is to prevent the high-pressure LS signal oil of other working pieces from interfering with the third working piece 8. The shuttle valve 12 can prevent one of the double pumps from failing, and the pressure reducing valve 13 can obtain oil from the other pump to prevent the sudden failure of the whole valve function due to damage to a single pump. At the same time, the pressure reducing valve 13 provides the pilot signal oil for the electric control valve.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual pump confluence solution, comprising a valve T port (1), characterized in that: The valve T port (1) is connected to a speed regulating valve (2) via a pipeline; a three-way flow valve (4) and an LS overflow valve (5) are connected between the valve T port (1) and the valve P port (3) via a pipeline; the valve P port (3) is connected to a first working piece (6), a second working piece (7), a third working piece (8), and a fourth working piece (9) in sequence from left to right via a pipeline; the first working piece (6), the second working piece (7), the third working piece (8), and the fourth working piece (9) are all connected to a compensation valve core (10) via a pipeline; the valve P port (3) is connected to a reversing valve core (11) via a pipeline and on the right side of the third working piece (8); the reversing valve core (11) is connected to a shuttle valve (12) via a pipeline; the shuttle valve (12) is connected to a reversing valve core (11) via a pipeline and at a position away from the third working piece (8). A pressure reducing valve (13) is connected at the position of the reversing valve core (11); the first working piece (6), the second working piece (7), the third working piece (8) and the fourth working piece (9) are all connected together through a pipeline, and a first non-return valve (14) and a second non-return valve (15) are respectively installed in the pipeline between the second working piece (7) and the third working piece (8) and between the third working piece (8) and the fourth working piece (9); the valve P port (3) is connected through a pipeline and a third non-return valve (16) is arranged on the right side of the reversing valve core (11); a secondary relief valve (17) is connected between the valve T port (1) and the valve P port (3) through a pipeline; and a plug (18) is connected to the pipeline between the valve T port (1) and the valve P port (3) and at a position close to the secondary relief valve (17).

2. A dual-pump confluence solution according to claim 1, characterized in that: The first one-way valve (14) and the third one-way valve (16) only allow the hydraulic oil to flow from right to left, and the second one-way valve (15) only allows the hydraulic oil to flow from left to right.

3. A dual-pump confluence solution according to claim 1, characterized in that: The speed regulating valve (2), the three-way flow valve (4) and the LS overflow valve (5) are each provided in two groups, and the three-way flow valve (4) and the LS overflow valve (5) are connected via a pipeline.

4. A dual-pump confluence solution according to claim 1, characterized in that: The first working piece (6), the second working piece (7), the third working piece (8) and the fourth working piece (9) are all composed of a valve body, a main valve core and a pilot proportional pressure reducing valve.

5. A dual-pump confluence solution according to claim 1, characterized in that: The oil in the fourth working section (9) passes through the third non-return valve (16) and then through the reversing valve core (11) to flow to the third working section. The reversing valve core (11) controls whether the oil in the fourth working section (9) can merge with the left three-way working sections (6), (7), and (8).

6. A dual-pump confluence solution according to claim 1, characterized in that: The control oil of the reversing valve core (11) comes from the compensation valve core (10).

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