Double-bale action control valve body of straw baling machine and control system applying valve body

Abstract

The invention relates to the technical field of control valves in hydraulic control equipment, in particular to a straw baler double-bale action control valve body and a control system applying the valve body, the straw baler double-bale action control valve body comprises a main valve body, the main valve body is provided with an oil inlet, an oil return port, an oil return port and a working oil port, and the main valve body is used for being connected with external components such as a hydraulic pump and a hydraulic cylinder. A plurality of components such as an electromagnetic reversing valve, an electromagnetic overflow valve, a one-way valve, an overflow valve and a pressure detection sensor are integrally installed on the main valve body, oil ducts matched with the components are arranged in the main valve body, and the oil ducts are communicated with one another according to the functions of the components arranged on the main valve body. The hydraulic pump supplies oil to the hydraulic cylinder, and the hydraulic cylinder executes straw packaging work of the two stations. According to the hydraulic control system, by controlling actions of all components, connection and disconnection of different oil channels and oil ways of the main valve body are achieved, accurate control over the oil quantity in a communication cavity is achieved, and alternate packaging operation of two stations of the straw packaging machine is achieved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic control technology for straw agricultural machinery and equipment, and in particular to a double-closing action control valve body for a straw baler and a control system using the valve body. Background Technology

[0002] A straw baler used in actual production is responsible for baling straw at two workstations. Hydraulic actuators are required to perform specific actions to complete the baling operation. This hydraulic control system requires numerous control components, employing a hydraulic system with multi-way control valve groups to drive hydraulic cylinders and complete related actions. The hydraulic control circuit is relatively complex, with high control requirements. It consists of multiple plate valves, cartridge valves, and valve blocks connected together, resulting in loosely distributed components. While meeting the control requirements, the valve group is large, the oil circuit structure is complex, and there are high orifice resistance, pressure loss, energy density, and heat generation. This is unsuitable for the current high-efficiency, highly integrated hydraulic control needs. Therefore, an integrated valve is needed to achieve its function and overcome its drawbacks. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a double-closing action control valve body for a straw baler and a control system using the valve body. The valve body is highly integrated, small in size, and reduces the overall weight of the valve block, making the valve assembly more flexible and compact in the equipment installation, and providing a better control system.

[0004] The technical solution adopted in this invention is: A double-closing action control valve body for a straw baler includes a main valve body, on which are provided an oil inlet P1, an oil inlet P2, an oil inlet P3, an oil return port T1, and an oil return port T2.

[0005] The front end face of the main valve body is fitted with a PG pressure sensor, a PG1 pressure sensor, a PG2 pressure sensor, and a PS1 pressure gauge.

[0006] The main valve body is located near the front end, with a Y1 solenoid cartridge ball valve and a solenoid cartridge ball valve at the bottom, a Y1 relief valve on the right side, and a Y2 relief valve and a PS2 pressure gauge on the left side.

[0007] The bottom of the main valve body is equipped with P1 check valve, P2 check valve, and P3 check valve, which are located on the side of Y1 solenoid cartridge ball valve and solenoid cartridge ball valve. The side of Y1 relief valve is equipped with P3 solenoid relief valve, the side of Y2 relief valve is equipped with P1 solenoid relief valve, and P2 solenoid relief valve is provided corresponding to P1 solenoid relief valve and P3 solenoid relief valve. P2 solenoid relief valve is located on the top of the main valve body.

[0008] On the top of the main valve body, next to the P2 solenoid relief valve, four sets of solenoid directional valves are arranged side by side: the first solenoid directional valve, the second solenoid directional valve, the third solenoid directional valve, and the fourth solenoid directional valve; four sets of directional valve core groups are inserted into the main valve body: the first directional valve core group, the second directional valve core group, the third directional valve core group, and the fourth directional valve core group, and the directional valve core groups are matched with the solenoid directional valves one by one.

[0009] The main valve body has interconnected oil passages inside.

[0010] The front face of the main valve body is equipped with PG pressure sensor connection ports, PG1 pressure sensor connection ports, PG2 pressure sensor connection ports, PS1 pressure gauge connection ports, first oil passage, second oil passage, and third oil passage; the left side is equipped with Y2 relief valve mounting holes, fourth oil passage, PS2 pressure gauge connection ports, and thirty-fifth oil passage; the right side is equipped with thirty-third oil passages, thirty-fourth oil passage, and Y1 relief valve mounting holes; the bottom end face is equipped with Y1 cartridge solenoid ball valve mounting holes, Y2 cartridge solenoid ball valve mounting holes, working oil port Y1, and working oil port Y2; the ends of the Y1 and Y2 cartridge solenoid ball valve mounting holes are connected to the oil inlet P2, and the first oil passage is connected to PS1. 2. The pressure gauge connection port is connected to the end of the 33rd oil circuit and the front end of the Y1 cartridge solenoid ball valve mounting hole. The working oil port Y1 passes through the 33rd oil circuit and connects to the end of the Y1 relief valve mounting hole. The PG1 pressure sensor connection port is connected to the 33rd oil circuit and the front end of the Y1 cartridge solenoid ball valve mounting hole. The 34th oil circuit passes through the Y1 relief valve mounting hole and connects to the second oil circuit. The fourth oil circuit is connected to the front end of the Y2 cartridge solenoid ball valve mounting hole. The working oil port Y2 passes through the fourth oil circuit and connects to the end of the Y2 relief valve mounting hole. The 35th oil circuit passes through the Y2 relief valve mounting hole and connects to the third oil circuit. The PG2 pressure sensor connection port is connected to the fourth oil circuit and the working oil port Y2.

[0011] The left side of the main valve body has a mounting hole for the P1 relief valve main valve core, which is located next to the mounting hole for the Y2 relief valve. The P1 relief valve main valve core mounting hole is matched with the fifth, sixth, and forty-second oil passages. The right side of the main valve body has a mounting hole for the P3 relief valve main valve core, which is located next to the mounting hole for the Y1 relief valve. The P3 relief valve main valve core mounting hole is matched with the forty-third, forty-fourth, and forty-sixth oil passages. The top end face of the main valve body has a mounting hole for the P2 relief valve main valve core, which is matched with the seventh and eighth oil passages. The bottom end face of the main valve body... The surface is provided with mounting holes for P1, P2, and P3 check valves, arranged side-by-side on the sides of mounting holes for Y1 and Y2 cartridge-type solenoid ball valves. A first connecting cavity is laterally provided between the P1, P2, and P3 check valve mounting holes. A third connecting cavity is provided between the P1 and P2 relief valve main valve core mounting holes. A second connecting cavity is provided between the P2 and P3 relief valve main valve core mounting holes. The P1 check valve mounting hole is connected to the P1 relief valve main valve core mounting hole, and the P2 check valve mounting hole is connected to the P2 relief valve main valve core mounting hole. The P3 check valve mounting hole... The oil inlet is connected to the mounting hole of the P3 relief valve main valve core; the PG pressure sensor connection port and the PS1 pressure gauge connection port are connected to the first connecting cavity. The PG pressure sensor connection port is located between the mounting holes of the P2 and P3 check valves, and the PS1 pressure gauge connection port is located between the mounting holes of the P1 and P2 check valves; the oil inlet P1 is connected to the mounting hole of the P1 check valve and the mounting hole of the P1 relief valve main valve core; the oil inlet P2 is connected to the mounting hole of the P2 check valve and the mounting hole of the P2 relief valve main valve core; the oil inlet P3 is connected to the mounting hole of the P3 check valve and the mounting hole of the P3 relief valve main valve core; the oil return port T1 is connected to the third connecting cavity; the oil return port T2 is connected to the second connecting cavity; the first oil... The first oil passage is connected to the main valve core mounting hole of the P2 relief valve; the second oil passage is connected to the main valve core mounting hole of the P3 relief valve; the third oil passage is connected to the main valve core mounting hole of the P1 relief valve; the forty-second oil passage is connected to the main valve core mounting hole of the P1 relief valve; the fifth oil passage is connected to the forty-second oil passage; the sixth oil passage is connected to the third connecting cavity; the fifth and sixth oil passages are connected to the oil passage port of the P1 electromagnetic relief valve; the forty-sixth oil passage is connected to the main valve core mounting hole of the P3 relief valve; the forty-fourth oil passage is connected to the forty-sixth oil passage; the forty-third oil passage is connected to the second connecting cavity; the forty-third and forty-fourth oil passages are connected to the oil passage port of the P3 electromagnetic relief valve.The seventh oil passage is connected to the mounting hole of the main valve core of the P2 relief valve, and the seventh and eighth oil passages are connected to the oil passage ports of the P2 solenoid relief valve.

[0012] On the main valve body, the side of the mounting hole for the P2 relief valve main valve core is sequentially provided with connecting holes that match the first electro-hydraulic directional valve, the second electro-hydraulic directional valve, the third electro-hydraulic directional valve, and the fourth solenoid directional valve. The left and right sides of the main valve body are provided with mounting holes for the directional valve groups: the first directional valve group mounting hole, the second directional valve group mounting hole, the third directional valve group mounting hole, and the fourth directional valve group mounting hole. The mounting holes for the first directional valve group are matched with the connecting holes for the first electro-hydraulic directional valve, the second directional valve group mounting holes are matched with the connecting holes for the second electro-hydraulic directional valve, the third directional valve group mounting holes are matched with the connecting holes for the third electro-hydraulic directional valve, and the fourth directional valve group mounting holes are matched with the connecting holes for the fourth solenoid directional valve.

[0013] The first directional valve assembly mounting hole is also provided with a fourth connecting cavity, which connects the two ends of the first directional valve assembly mounting hole. The second directional valve assembly mounting hole is also provided with a fifth connecting cavity, which connects the two ends of the second directional valve assembly mounting hole. The third directional valve assembly mounting hole is also provided with a sixth connecting cavity, which connects the two ends of the third directional valve assembly mounting hole. The fourth directional valve assembly mounting hole is also provided with a seventh connecting cavity, which connects the two ends of the fourth directional valve assembly mounting hole.

[0014] The bottom of the valve body is provided with the 36th and 37th oil passages, which are connected to the mounting holes of the first directional valve group; the bottom of the main valve body is provided with working oil ports A1 and B1, which are connected to the mounting holes of the second directional valve group; the bottom of the main valve body is provided with working oil ports A2 and B2, which are connected to the mounting holes of the third directional valve group; the bottom of the main valve body is provided with working oil ports A3 and B3, which are connected to the mounting holes of the fourth directional valve group.

[0015] The main valve body is equipped with the 55th and 56th oil passages, which are connected to the 4th, 5th, 6th and 7th connecting cavities.

[0016] The main valve body is also equipped with a forty-first oil passage, which is connected to the second, third, and fourth directional valve assembly mounting passages. The end of the forty-first oil passage is connected to the P2 check valve mounting passage.

[0017] The internal oil passages of the main valve body are smoothly transitioned through casting.

[0018] A control system for a double-closing action control valve body of a straw baler includes a first hydraulic pump, a second hydraulic pump, a third hydraulic pump, an oil tank, a bidirectional output hydraulic cylinder, a first hydraulic cylinder, a third hydraulic cylinder, a second hydraulic cylinder, a fourth hydraulic cylinder, a main valve body, and various hydraulic oil circuit control components installed on the main valve body. The bidirectional output hydraulic cylinder includes a left piston rod and a right piston rod.

[0019] The first, second, and third hydraulic pumps are connected to an external oil tank and driven by the engine. They supply oil from the main pipeline to the corresponding hydraulic cylinders through branch pipes. The first hydraulic pump is equipped with a P1 check valve and a P1 solenoid relief valve, the second hydraulic pump is equipped with a P2 check valve and a P2 solenoid relief valve, and the third hydraulic pump is equipped with a P3 check valve and a P3 solenoid relief valve. After the oil circuits of the first, second, and third hydraulic pumps converge, they are divided into three groups of oil circuits to control the actions of each hydraulic cylinder. One group controls the rodless oil chambers of the third and fourth hydraulic cylinders, and is equipped with a fourth electro-hydraulic directional valve. Another group controls the rodless oil chambers of the first and second hydraulic cylinders, and is equipped with a third electro-hydraulic directional valve. The third group controls the two rod-type oil chambers of the bidirectional output hydraulic cylinder, and is equipped with a second electro-hydraulic directional valve.

[0020] The hydraulic circuit connecting the first, second, and third hydraulic pumps is also equipped with a PS1 pressure gauge, a PS2 pressure gauge, and a PG pressure sensor.

[0021] The second hydraulic pump circuit also has a branch circuit, which is equipped with a first electro-hydraulic directional valve. The first electro-hydraulic directional valve is connected to the rod-side oil chamber circuit that controls the bidirectional output hydraulic cylinder.

[0022] The first hydraulic pump circuit also has two branch circuits. One branch circuit is connected to the rod chambers of the third and fourth hydraulic cylinders, and the other branch circuit is connected to the rod chambers of the first and second hydraulic cylinders. The circuit connecting the rod chambers of the third and fourth hydraulic cylinders is equipped with a Y1 cartridge solenoid ball valve, a Y1 relief valve, and a PG1 pressure sensor. The circuit connecting the rod chambers of the first and second hydraulic cylinders is equipped with a Y2 cartridge solenoid ball valve, a Y2 relief valve, and a PG2 pressure sensor.

[0023] Oil inlet P1 is connected to the first hydraulic pump, oil inlet P2 is connected to the second hydraulic pump; oil inlet is connected to the third hydraulic pump, oil return ports T1 and T2 are connected to the oil tank; working port A1 is connected to the rod chamber of the left piston rod, working port B1 is connected to the rod chamber of the right piston rod, working port A2 is connected to the rodless chamber of the first hydraulic cylinder, working port B2 is connected to the rodless chamber of the second hydraulic cylinder, working port A3 is connected to the rodless chamber of the third hydraulic cylinder, working port B3 is connected to the rodless chamber of the fourth hydraulic cylinder, working port Y1 is connected to the rod chambers of the third and fourth hydraulic cylinders respectively, and working port Y2 is connected to the rod chambers of the first and second hydraulic cylinders.

[0024] The right piston rod, first hydraulic cylinder, and third hydraulic cylinder of the bidirectional output hydraulic cylinder control the baling operation of straw at one workstation, while the left piston rod, second hydraulic cylinder, and fourth hydraulic cylinder of the bidirectional output hydraulic cylinder control the baling operation of straw at another workstation. The two workstations alternately carry out baling operations.

[0025] The beneficial effects of this invention are: This invention discloses a double-baling action control valve body for a straw baler and a control system using the valve body. The valve body includes a main valve body with an oil inlet, an oil return port, and a working oil port for connecting to external components such as a hydraulic pump and hydraulic cylinders. Several electromagnetic directional valves, electromagnetic relief valves, check valves, overflow valves, and pressure sensors are integrated and installed on the main valve body. The oil passages are interconnected according to the functions of the components on the main valve body. The hydraulic pump supplies oil to the hydraulic cylinders, which perform straw baling operations at two stations. This hydraulic control system, by controlling the actions of each component, realizes the opening and closing of different oil passages in the main valve body, achieving precise control of the oil volume in the connected chambers, and enabling alternating baling operations at the two stations of the straw baler. To ensure the stability of the hydraulic cylinder's actions, an electromagnetic cartridge ball valve and a relief valve are installed in its connecting oil circuit to achieve precise control of the oil volume in the connecting cavity. When there is too much oil in the connecting cavity, the excess oil is drained through the coordinated work of the electromagnetic cartridge ball valve and the relief valve; when there is insufficient oil in the connecting cavity, the oil volume is replenished through the control of the two valves. This ensures that the oil in the connecting cavity is replenished or released in a timely manner, so that the pair of cylinders connected in the connecting cavity can move synchronously to their positions. Attached Figure Description

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in conjunction with the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 Main valve body structure diagram Figure 1 ; Figure 4 Main valve body structure diagram Figure 2 ; Figure 5 for Figure 1 Main view structural diagram; Figure 6 for Figure 5 Sectional view along II; Figure 7 for Figure 5 A cross-sectional view along JJ; Figure 8 for Figure 5 Sectional view along KK; Figure 9 for Figure 5 Sectional view along LL; Figure 10 for Figure 5 Sectional view along MM; Figure 11 for Figure 5 A cross-sectional view along NN; Figure 12 for Figure 1 Top view structural diagram; Figure 13 for Figure 12 A cross-sectional view along PP; Figure 14 Hydraulic schematic diagram for controlling valve body operation.

[0028] In the diagram: 1-Main valve body, 101-First oil passage, 102-Second oil passage, 103-Third oil passage, 104-Y2 relief valve mounting passage, 105-Fourth oil passage, 106-P1 relief valve main valve core mounting passage, 107-Fifth oil passage, 108-Sixth oil passage, 110-P2 relief valve main valve core mounting passage, 111-Seventh oil passage, 112-Eighth oil passage, 114-First directional valve assembly mounting passage, 115-Second directional valve assembly mounting passage, 116-Third directional valve assembly mounting passage, 117-Fourth directional valve assembly mounting passage, 118-Ninth oil passage, 119-Tenth oil passage Channels 120-11th oil passage, 121-12th oil passage, 122-13th oil passage, 123-14th oil passage, 124-15th oil passage, 125-16th oil passage, 126-17th oil passage, 127-18th oil passage, 128-19th oil passage, 129-20th oil passage, 130-21st oil passage, 131-22nd oil passage, 132-23rd oil passage, 133-24th oil passage, 134-25th oil passage, 135-26th oil passage, 136-27th oil passage, 137-28th oil passage 138 - Twenty-ninth oil passage, 139 - Thirtieth oil passage, 140 - Thirty-first oil passage, 141 - Thirty-second oil passage, 146 - Thirty-third oil passage, 147 - Thirty-fourth oil passage, 148 - Y1 relief valve mounting passage, 149 - Thirty-fifth oil passage, 150 - Y1 cartridge solenoid ball valve mounting passage, 151 - Y2 cartridge solenoid ball valve mounting passage, 152 - P1 check valve mounting passage, 153 - P2 check valve mounting passage, 154 - P3 check valve mounting passage, 155 - Thirty-sixth oil passage, 156 - Thirty-seventh oil passage, 160 - Forty-first oil passage, 161 - 42nd oil passage, 162-P3 relief valve main valve core mounting passage, 163-43rd oil passage, 164-44th oil passage, 165-46th oil passage, 167-47th oil passage, 168-48th oil passage, 169-49th oil passage, 170-50th oil passage, 171-51st oil passage, 172-52nd oil passage, 173-53rd oil passage, 174-54th oil passage, 175-55th oil passage, 176-56th oil passage, 178-PG pressure sensor connection port, 179-PG1 pressure sensor connection port.180 - PG2 pressure sensor connection port, 181 - PS1 pressure gauge connection port, 182 - PS2 pressure gauge connection port, 183 - First connecting channel, 184 - Second connecting channel, 185 - Third connecting channel, 186 - Fourth connecting channel, 187 - Fifth connecting channel, 188 - Sixth connecting channel, 189 - Seventh connecting channel. 2-First electro-hydraulic directional valve, 3-Second electro-hydraulic directional valve, 4-Third electro-hydraulic directional valve, 5-Fourth solenoid directional valve, 6-P1 solenoid relief valve, 7-P2 solenoid relief valve, 8-P3 solenoid relief valve, 9-P1 check valve, 10-P2 check valve, 11-P3 check valve, 12-Y1 cartridge solenoid ball valve, 13-Y2 cartridge solenoid ball valve, 14-Y1 relief valve, 15-Y2 relief valve, 16-First directional valve core assembly, 17-Second directional valve core assembly, 18-Third 19-Fourth directional valve core assembly; 20-First hydraulic pump; 21-Second hydraulic pump; 22-Third hydraulic pump; 23-Bidirectional output hydraulic cylinder; 2301-Left piston rod; 2302-Right piston rod; 24-First hydraulic cylinder; 25-Second hydraulic cylinder; 26-Third hydraulic cylinder; 27-Fourth hydraulic cylinder; 28-PG pressure sensor; 29-PG1 pressure sensor; 30-PG2 pressure sensor; 31-PS1 pressure gauge; 32-PS2 pressure gauge. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0031] like Figures 1-2As shown, a double-baling action control valve body for a straw baler and a control system using the valve body are disclosed. The valve body includes a main valve body 1. One end face of the main valve body 1 is provided with oil inlets P1, P2, and P3, and oil return ports T1 and T2. For ease of structural description, this end face is referred to as the front face of the main valve body 1. The oil ports on the front face can be fitted with matching pipe fittings for connection to external oil circuits. The front face of the main valve body 1 is also provided with a PG pressure sensor 28 and a PG1 pressure sensor 2. 9. A PG2 pressure sensor 30 and a PS1 pressure gauge 31 are installed around the main valve body 1 near the front end. The main valve body 1 is equipped with a Y1 solenoid cartridge ball valve 12, a Y2 solenoid cartridge ball valve 13, a Y1 relief valve 14, a Y2 relief valve 15, and a PS2 pressure gauge 32. Specifically, the Y1 and Y2 cartridge solenoid ball valves 12 and 13 are located at the bottom of the main valve body 1, the Y1 relief valve 14 is located on the right side of the main valve body 1, and the Y2 relief valve 15 and PS2 pressure gauge 32 are located at the... On the left side; a P1 solenoid relief valve 6 is installed on the side of Y2 relief valve 15, and a P3 solenoid relief valve 8 is installed on the side of Y1 relief valve 14. A P2 solenoid relief valve 7 is installed corresponding to P1 and P3 solenoid relief valves 6 and 8, respectively. The P2 solenoid relief valve 7 is located at the top of the main valve body 1. P1 check valve 9, P2 check valve 10, and P3 check valve 11 are located at the bottom of the main valve body 1. The P1 check valve 9, P2 check valve 10, and P3 check valve 11 are located near the Y1 solenoid cartridge ball valve 12. Four sets of solenoid directional valves are arranged side-by-side on the side of Y2 solenoid cartridge ball valve 13 and P2 solenoid relief valve 7: first electro-hydraulic directional valve 2, second electro-hydraulic directional valve 3, third electro-hydraulic directional valve 4, and fourth solenoid directional valve 5. Matching the first electro-hydraulic directional valve 2, second electro-hydraulic directional valve 3, third electro-hydraulic directional valve 4, and fourth solenoid directional valve 5, the main valve body 1 contains a first directional valve core assembly 16, a second directional valve core assembly 17, a third directional valve core assembly 18, and a fourth directional valve core assembly 19. The main valve body 1 has interconnected oil passages, and the oil passages are controlled by solenoid valves and cartridge valves to precisely control the operation of external actuators, ensuring efficient operation of the actuators.

[0032] like Figures 3-6As shown, the front end face of the main valve body 1 is provided with oil inlet P1, oil inlet P2, oil inlet P3, oil return port T1, and oil return port T2. Oil inlet P1, oil inlet P2, and oil inlet P3 are located in the middle of the front end face, and oil return ports T1 and T2 are located above oil inlet P1, oil inlet P2, and oil inlet P3. The front end face of the main valve body 1 is also provided with PG pressure sensor connection port 178, PG1 pressure sensor connection port 179, and PG2 pressure sensor connection port 179. 80. PS1 pressure gauge connection port 181, PG pressure sensor 28 is installed at PG pressure sensor connection port 178, PG1 pressure sensor 29 is installed at PG1 pressure sensor connection port 179, PG2 pressure sensor 30 is installed at PG2 pressure sensor connection port 180, PS1 pressure gauge 31 is installed at PS1 pressure gauge connection port 181; the front end face of the main valve body 1 is also provided with a first oil passage 101, a second oil passage 102, and a third oil passage 103.

[0033] like Figures 3-6 As shown, in the area near the front end of the main valve body 1, the left side is provided with a Y2 relief valve mounting hole 104, a fourth oil passage 105, a PS2 pressure gauge connection port 182, and a thirty-fifth oil passage 149; the right side is provided with a thirty-third oil passage 146, a thirty-fourth oil passage 147, and a Y1 relief valve mounting hole 148; and the bottom end face is provided with a Y1 cartridge solenoid ball valve mounting hole 150 and a Y2 cartridge solenoid ball valve mounting hole 151. The Y1 cartridge solenoid ball valve mounting hole 150 and the Y2 cartridge solenoid ball valve mounting hole 151 are positioned horizontally and vertically. The valves are arranged in the middle. A working oil port Y1 is provided on the side of the Y1 cartridge solenoid ball valve mounting channel 150, and a working oil port Y2 is provided on the side of the Y2 cartridge solenoid ball valve mounting channel 151. A Y2 relief valve 15 is installed in the Y2 relief valve mounting channel 104. A PS2 pressure gauge 32 is installed in the PS2 pressure gauge connection port 182. A Y1 relief valve 14 is installed in the Y1 relief valve mounting channel 148. A Y1 cartridge solenoid ball valve 12 is installed in the Y1 cartridge solenoid ball valve mounting channel 150, and a Y2 cartridge solenoid ball valve 13 is installed in the Y2 cartridge solenoid ball valve mounting channel 151.

[0034] like Figure 6As shown, the ends of the Y1 cartridge solenoid ball valve mounting port 150 and the Y2 cartridge solenoid ball valve mounting port 151 are connected to the oil inlet P2. The first oil passage 101 is connected to the end of the PS2 pressure gauge connection port 182. The thirty-third oil passage 146 is connected to the front end of the Y1 cartridge solenoid ball valve mounting port 150. The working oil port Y1 passes through the thirty-third oil passage 146 and is connected to the end of the Y1 relief valve mounting port 148. The PG1 pressure sensor connection port 179 is connected to the thirty-third oil passage 146 and the Y1 cartridge solenoid ball valve mounting port 150. 50 is connected at the front end; the 34th oil passage 147 passes through the Y1 overflow valve mounting passage 148 and is connected to the second oil passage 102; the fourth oil passage 105 is connected to the front end of the Y2 cartridge solenoid ball valve mounting passage 151; the working oil port Y2 passes through the fourth oil passage 105 and is connected to the end of the Y2 overflow valve mounting passage 104; the 35th oil passage 149 passes through the Y2 overflow valve mounting passage 104 and is connected to the third oil passage 103; the PG2 pressure sensor connection port 180 is connected to the fourth oil passage 105 and the working oil port Y2.

[0035] like Figures 3-5 , Figure 7 , Figures 12-13 As shown, a P1 relief valve main valve core mounting channel 106 is provided on the left side of the main valve body 1. The P1 relief valve main valve core mounting channel 106 is located next to the Y2 relief valve mounting channel 104. The P1 relief valve main valve core mounting channel 106 is matched with the fifth oil passage 107, the sixth oil passage 108, and the forty-second oil passage 161 for mounting the P1 solenoid relief valve 6. A P3 relief valve main valve core mounting channel 162 is provided on the right side of the main valve body 1. The P3 relief valve main valve core mounting channel 162 is located next to the Y1 relief valve mounting channel 148. The P3 relief valve main valve core mounting channel 162 is matched with the forty-third oil passage 163, the forty-fourth oil passage 164, and the forty-sixth oil passage 165 for mounting the P1 solenoid relief valve 6. 3. Electromagnetic relief valve 8. The top end face of the main valve body 1 is provided with a P2 relief valve main valve core mounting channel 110. The P2 relief valve main valve core mounting channel 110 is matched with the seventh oil passage 111 and the eighth oil passage 112 for installing the P2 electromagnetic relief valve 7. The bottom end face of the main valve body 1 is provided with a P1 check valve mounting channel 152, a P2 check valve mounting channel 153, and a P3 check valve mounting channel 154, which are arranged side by side on the side of the Y1 cartridge electromagnetic ball valve mounting channel 150 and the Y2 cartridge electromagnetic ball valve mounting channel 151. The P1 check valve 9 is installed in the P1 check valve mounting channel 152, the P2 check valve 10 is installed in the P2 check valve mounting channel 153, and the P3 check valve 11 is installed in the P3 check valve mounting channel 154.

[0036] like Figure 7 , Figure 13As shown, a first connecting cavity 183 is laterally arranged between the P1 check valve mounting channel 152, the P2 check valve mounting channel 153, and the P3 check valve mounting channel 154; a third connecting cavity 185 is arranged between the P1 relief valve main valve core mounting channel 106 and the P2 relief valve main valve core mounting channel 110; a second connecting cavity 184 is arranged between the P2 relief valve main valve core mounting channel 110 and the P3 relief valve main valve core mounting channel 162; the P1 check valve mounting channel 152 is connected to the P1 relief valve main valve core mounting channel 106; the P2 check valve mounting channel 153 is connected to the P2 relief valve main valve core mounting channel 110; and the P3 check valve mounting channel 154 is connected to the P3... The main valve core mounting hole 162 of the relief valve is connected to the main valve core of the relief valve. The PG pressure sensor connection port 178 is connected to the first connecting cavity 183. The PG pressure sensor connection port 178 is located between the P2 check valve mounting hole 153 and the P3 check valve mounting hole 154. The PS1 pressure gauge connection port 181 is connected to the first connecting cavity 183. The PS1 pressure gauge connection port 181 is located between the P1 check valve mounting hole 152 and the P2 check valve mounting hole 153. The oil inlet P1 is connected to the P1 check valve mounting hole 152 and the P1 relief valve main valve core mounting hole 106. The oil inlet P2 is connected to the P2 check valve mounting hole 153 and the P2 relief valve main valve core mounting hole 110. Oil inlet P3 is connected to the P3 check valve mounting channel 154 and the P3 relief valve main valve core mounting channel 162. Oil return port T1 is connected to the third connecting channel 185. Oil return port T2 is connected to the second connecting channel 184. The first oil passage 101 is connected to the P2 relief valve main valve core mounting channel 110. The second oil passage 102 is connected to the P3 relief valve main valve core mounting channel 162. The third oil passage 103 is connected to the P1 relief valve main valve core mounting channel 106. The forty-second oil passage 161 is connected to the P1 relief valve main valve core mounting channel 106. The fifth oil passage 107 is connected to the forty-second oil passage 161. The sixth oil passage 108 is connected to the... The three-way connecting channel 185 is connected; the fifth oil passage 107 and the sixth oil passage 108 are connected to the oil passage of the P1 electromagnetic relief valve 6; the forty-sixth oil passage 165 is connected to the P3 relief valve main valve core mounting channel 162; the forty-fourth oil passage 164 is connected to the forty-sixth oil passage 165; the forty-third oil passage 163 is connected to the second connecting channel 184; the forty-third oil passage 163 and the forty-fourth oil passage 164 are connected to the oil passage of the P3 electromagnetic relief valve 8; the seventh oil passage 111 is connected to the P2 relief valve main valve core mounting channel 110; the seventh oil passage 111 and the eighth oil passage 112 are connected to the oil passage of the P2 electromagnetic relief valve 7.

[0037] like Figures 1-5As shown, on the main valve body 1, on the side of the P2 overflow valve main valve core mounting channel 110, channels are sequentially provided to match the first electro-hydraulic directional valve 2, the second electro-hydraulic directional valve 3, the third electro-hydraulic directional valve 4, and the fourth solenoid directional valve 5.

[0038] like Figures 3-5 , Figure 8 , Figures 12-13 As shown, the top end face of the main valve body 1 is provided with a thirteenth oil passage 122, a fourteenth oil passage 123, a forty-seventh oil passage 167, and a forty-eighth oil passage 168. The thirteenth oil passage 122, the fourteenth oil passage 123, the forty-seventh oil passage 167, and the forty-eighth oil passage 168 are matched and connected to the oil passage of the first electro-hydraulic directional valve 2. The left and right sides of the main valve body 1 are provided with first directional valve assembly mounting holes 114 for inserting the first directional valve core assembly 16. The top two sides of the main valve body 1 are each provided with a ninth oil passage 118 and an eleventh oil passage 120, which are connected to the first directional valve assembly mounting holes 114. The two sides of the main valve body 1 are respectively provided with a tenth oil passage 119 and a twelfth oil passage 121. The tenth oil passage 119 passes through the ninth oil passage 118 and the twelfth oil passage 121. The ends of the three oil passages 122 are connected. The twelfth oil passage 121 passes through the eleventh oil passage 120 and connects to the ends of the fourteenth oil passage 123. The bottom sides of the main valve body 1 are provided with the thirty-sixth oil passage 155 and the thirty-seventh oil passage 156. The thirty-sixth oil passage 155 and the thirty-seventh oil passage 156 are connected to the first directional valve assembly mounting passage 114. The ninth oil passage 118 is located on the same side as the thirty-sixth oil passage 155. The eleventh oil passage 120 is located on the same side as the thirty-seventh oil passage 156. The first directional valve assembly mounting passage 114 is also provided with a fourth connecting cavity 186. The fourth connecting cavity 186 connects the two ends of the first directional valve assembly mounting passage 114. The forty-seventh oil passage 167 is connected to the first directional valve assembly mounting passage 114. The forty-eighth oil passage 168 is connected to the fourth connecting cavity 186. The structural features of the fourth connecting cavity 186 and the first reversing valve assembly mounting hole 114 are conventional technologies for reversing valve assembly cores, and will not be described in detail here.

[0039] like Figures 3-5 , Figure 9 , Figures 12-13As shown, the top end face of the main valve body 1 is provided with the nineteenth oil passage 128, the twentieth oil passage 129, the forty-ninth oil passage 169, and the fiftieth oil passage 170. The nineteenth oil passage 128, the twentieth oil passage 129, the forty-ninth oil passage 169, and the fiftieth oil passage 170 are matched and connected to the oil passage ports of the second electro-hydraulic directional valve 3. The left and right sides of the main valve body 1 are provided with the second directional valve assembly mounting holes 115 for inserting the second directional valve core assembly 17. The top two sides of the main valve body 1 are each provided with the fifteenth oil passage 124 and the seventeenth oil passage 126. The fifteenth oil passage 124 and the seventeenth oil passage 126 are connected to the second directional valve assembly mounting holes 115. The two sides of the main valve body 1 are respectively provided with the sixteenth oil passage 125 and the eighteenth oil passage 127. The sixteenth oil passage 125 is connected to the second directional valve assembly mounting holes 115. 25 passes through the fifteenth oil passage 124 and connects to the end of the nineteenth oil passage 128. The eighteenth oil passage 127 passes through the seventeenth oil passage 126 and connects to the end of the twentieth oil passage 129. Working oil ports A1 and B1 are provided on both sides of the bottom of the main valve body 1. Working oil ports A1 and B1 are connected to the second directional valve assembly mounting passage 115. The seventeenth oil passage 126 is located on the same side as working oil port A1. The fifteenth oil passage 124 is located on the same side as working oil port B1. The second directional valve assembly mounting passage 115 is also provided with a fifth connecting cavity 187. The fifth connecting cavity 187 connects the two ends of the second directional valve assembly mounting passage 115. The forty-ninth oil passage 169 is connected to the second directional valve assembly mounting passage 115. The fiftieth oil passage 170 is connected to the fifth connecting cavity 187. The structural features of the fifth connecting cavity 187 and the second reversing valve assembly mounting hole 115 are existing conventional technologies for reversing valve assembly cores, and will not be described in detail here.

[0040] like Figures 3-5 , Figure 10 , Figures 12-13As shown, the top end face of the main valve body 1 is provided with a 25th oil passage 134, a 26th oil passage 135, a 51st oil passage 171, and a 52nd oil passage 172. The 25th oil passage 134, 26th oil passage 135, 51st oil passage 171, and 52nd oil passage 172 are matched and connected to the oil passage of the third electro-hydraulic directional valve 4. The left and right sides of the main valve body 1 are provided with third directional valve assembly mounting holes 116 for inserting the third directional valve core assembly 18. The top two sides of the main valve body 1 are each provided with a 21st oil passage 130 and a 23rd oil passage 132, which are connected to the third directional valve assembly mounting holes 116. The main valve body 1 is also provided with a 22nd oil passage 131 and a 24th oil passage 133 on each side. The duct 131 passes through the end of the 21st oil passage 130 and the 25th oil passage 134. The 24th oil passage 133 passes through the end of the 23rd oil passage 132 and the 26th oil passage 135. Working ports A2 and B2 are provided on both sides of the bottom of the main valve body 1. Working ports A2 and B2 are connected to the third directional valve assembly mounting passage 116. The 23rd oil passage 132 is on the same side as working port A2. The 21st oil passage 130 is on the same side as working port B2. The third directional valve assembly mounting passage 116 is also provided with a sixth connecting cavity 188. The sixth connecting cavity 188 connects the two ends of the third directional valve assembly mounting passage 116. The 51st oil passage 171 is connected to the third directional valve assembly mounting passage 116. The 52nd oil passage 172 is connected to the sixth connecting cavity 188. The structural features of the sixth connecting cavity 188 and the third reversing valve assembly mounting hole 116 are conventional technologies for reversing valve assembly cores, and will not be described in detail here.

[0041] like Figures 3-5 , Figures 11-13As shown, the top end face of the main valve body 1 is provided with a 31st oil passage 140, a 32nd oil passage 141, a 53rd oil passage 173, and a 54th oil passage 174. These oil passages 140, 141, 173, and 174 are connected to the oil passage of the fourth solenoid directional valve 5. A fourth directional valve assembly mounting hole 117 is provided through the left and right sides of the main valve body 1 for inserting the fourth directional valve core assembly 19. A 27th oil passage 136 and a 29th oil passage 138 are provided on each side of the top of the main valve body 1. These oil passages 136 and 138 are connected to the fourth directional valve assembly mounting hole 117. A 28th oil passage 137 and a 30th oil passage 139 are provided on each side of the main valve body 1. Channel 137 passes through the twenty-seventh oil passage 136 and connects to the end of the thirty-first oil passage 140. Channel 139 passes through the twenty-ninth oil passage 138 and connects to the end of the thirty-second oil passage 141. Working ports A3 and B3 are provided on both sides of the bottom of the main valve body 1. Working ports A3 and B3 are connected to the fourth directional valve assembly mounting channel 117. Channel 138 of the twenty-ninth oil passage is on the same side as working port A3. Channel 136 of the twenty-seventh oil passage is on the same side as working port B3. Channel 117 of the fourth directional valve assembly is also provided with a seventh connecting cavity 189. Channel 189 connects the two ends of channel 117 of the fourth directional valve assembly. Channel 173 of the fifty-third oil passage is connected to channel 117 of the fourth directional valve assembly. Channel 174 of the fifty-fourth oil passage is connected to channel 189 of the seventh connecting cavity. The structural features of the seventh connecting cavity 189 and the fourth reversing valve assembly mounting hole 117 are conventional technologies for reversing valve assembly cores, and will not be described in detail here.

[0042] like Figures 8-11 As shown, the main valve body 1 is provided with a 55th oil passage 175 and a 56th oil passage 176, which are connected to the fourth connecting cavity 186, the fifth connecting cavity 187, the sixth connecting cavity 188, and the seventh connecting cavity 189.

[0043] like Figure 13 As shown, the main valve body 1 is also provided with a forty-first oil passage 160. The forty-first oil passage 160 is connected to the second directional valve group mounting passage 115, the third directional valve group mounting passage 116, and the fourth directional valve group mounting passage 117. The end of the forty-first oil passage 160 is connected to the P2 check valve mounting passage 153.

[0044] In this embodiment, all internal oil passages of the main valve body are smoothly transitioned by casting.

[0045] In this embodiment, the front, back, left, and right pitch planes are defined above for clarity. In actual production, the valve body is cast as a whole and valves with the same function are inserted into it, and oil ports with the same function are set. The positions of each functional valve and oil port can be adjusted arbitrarily on the six surfaces.

[0046] This embodiment provides a double-baling action control valve body for a straw baler and a control system using this valve body, which achieves the following: Figure 14 The control of the hydraulic system shown.

[0047] The hydraulic control system for the double-closing action of a straw baler of this embodiment includes: a first hydraulic pump 20, a second hydraulic pump 21, a third hydraulic pump 22, an oil tank, a bidirectional output hydraulic cylinder 23, a first hydraulic cylinder 24, a third hydraulic cylinder 26, a second hydraulic cylinder 25, a fourth hydraulic cylinder 27, a main valve body 1, and various hydraulic oil circuit control components installed on the main valve body 1.

[0048] like Figure 14 As shown in the figure, this embodiment provides a double-closing action control valve body for a straw baler and a control system using the valve body to control five hydraulic cylinders in the hydraulic system to perform station actions. Specifically, the right piston rod 2302 of the bidirectional output hydraulic cylinder 23, the first hydraulic cylinder 24, and the third hydraulic cylinder 26 control the baling operation of straw at one station, while the left piston rod 2301, the second hydraulic cylinder 25, and the fourth hydraulic cylinder 27 of the bidirectional output hydraulic cylinder 23 control the baling operation of straw at another station. The two stations alternately perform baling operations.

[0049] When the workstations controlled by the right piston rod 2302 of the bidirectional output hydraulic cylinder 23, the first hydraulic cylinder 24, and the third hydraulic cylinder 26 are carrying out straw baling operations, the right piston rod 2302 of the bidirectional output hydraulic cylinder 23, the piston rod of the first hydraulic cylinder 24, and the piston rod of the third hydraulic cylinder 26 need to be pushed out.

[0050] When the workstations controlled by the left piston rod 2301 of the bidirectional output hydraulic cylinder 23, the second hydraulic cylinder 25, and the fourth hydraulic cylinder 27 are carrying out straw baling operations, the left piston rod 2301 of the bidirectional output hydraulic cylinder 23, the piston rod of the second hydraulic cylinder 25, and the piston rod of the fourth hydraulic cylinder 27 perform the pushing action.

[0051] The first hydraulic pump 20, the second hydraulic pump 21, and the third hydraulic pump 22 supply oil to each cylinder. Under the control of the control system, the three hydraulic pumps can work simultaneously or individually, providing hydraulic oil of different pressure levels according to actual needs. The control system controls the hydraulic cylinders in the hydraulic system to perform process actions.

[0052] like Figures 1-4As shown, the hydraulic control components are installed on the main valve body 1: a PG pressure sensor 28 is inserted into the orifice of the PG pressure sensor connection port 178; a PG1 pressure sensor 29 is inserted into the orifice of the PG1 pressure sensor connection port 179; a PG2 pressure sensor 30 is inserted into the orifice of the PG2 pressure sensor connection port 180; a PS1 pressure gauge 31 is inserted into the orifice of the PS1 pressure gauge connection port 181; a Y2 relief valve 15 is inserted into the orifice of the Y2 relief valve mounting channel 104; a PS2 pressure gauge 32 is installed into the orifice of the PS2 pressure gauge connection port 182; a Y1 relief valve 14 is inserted into the orifice of the Y1 relief valve mounting channel 148; and a Y1 cartridge-type solenoid ball valve is inserted into the orifice of the Y1 cartridge-type solenoid ball valve mounting channel 150. A Y2 cartridge solenoid ball valve 12 is installed in the orifice of the Y2 cartridge solenoid ball valve mounting channel 151. A P1 solenoid relief valve 6, a P2 solenoid relief valve 7, and a P3 solenoid relief valve 8 are installed in the corresponding channels. A P1 check valve 9 is installed in the P1 check valve mounting channel 152. A P2 check valve 10 is installed in the P2 check valve mounting channel 153. A P3 check valve 11 is installed in the P3 check valve mounting channel 154. A first electro-hydraulic directional valve 2, a second electro-hydraulic directional valve 3, a third electro-hydraulic directional valve 4, and a fourth solenoid directional valve 5 are installed in the corresponding channels. A first directional valve core group 16, a second directional valve core group 17, a third directional valve core group 18, and a fourth directional valve core group 19 are installed in the matching directional valve group mounting channels.

[0053] like Figure 14 As shown, the first hydraulic pump 20, the second hydraulic pump 21, and the third hydraulic pump 22 are connected to an external fuel tank and driven by the engine. Through branch pipes, they supply oil from the main pipeline to the corresponding hydraulic cylinders. The first hydraulic pump 20 is equipped with a P1 check valve 9 and a P1 solenoid relief valve 6 on its oil circuit. The second hydraulic pump 21 is equipped with a P2 check valve 10 and a P2 solenoid relief valve 7 on its oil circuit. The third hydraulic pump 22 is equipped with a P3 check valve 11 and a P3 solenoid relief valve 8 on its oil circuit. After the oil circuits of the first hydraulic pump 20, the second hydraulic pump 21, and the third hydraulic pump 22 converge, they are divided into three groups of oil circuits to control the hydraulic cylinders to perform actions. One group controls the rodless oil chamber of the third hydraulic cylinder 26 and the fourth hydraulic cylinder 27, and is equipped with a fourth electro-hydraulic directional valve 5 on its oil circuit. Another group controls the rodless oil chamber of the first hydraulic cylinder 24 and the second hydraulic cylinder 25, and is equipped with a third electro-hydraulic directional valve 4 on its oil circuit. The third group controls the rod-type oil chamber of the bidirectional output hydraulic cylinder 23, and is equipped with a second electro-hydraulic directional valve 3 on its oil circuit.

[0054] The first hydraulic pump 20, the second hydraulic pump 21, and the third hydraulic pump 22 are connected in series. The oil circuit is also equipped with a PS1 pressure gauge 31, a PS2 pressure gauge 32, and a PG pressure sensor 28.

[0055] The second hydraulic pump 21 also has a branch oil circuit, which is equipped with a first electro-hydraulic directional valve 2. The first electromagnetic directional valve 2 is connected to the rod oil chamber of the bidirectional output hydraulic cylinder 23.

[0056] The first hydraulic pump 20 has two branch oil circuits. One branch connects to the rod chambers of the third hydraulic cylinder 26 and the fourth hydraulic cylinder 27, and the other connects to the rod chambers of the first hydraulic cylinder 24 and the second hydraulic cylinder 25. A Y1 cartridge-type solenoid ball valve 12, a Y1 relief valve 14, and a PG1 pressure sensor 29 are also installed on the oil circuit connecting the rod chambers of the third hydraulic cylinder 26 and the fourth hydraulic cylinder 27. A Y2 cartridge-type solenoid ball valve is also installed on the oil circuit connecting the rod chambers of the first hydraulic cylinder 24 and the second hydraulic cylinder 25. Valve 13, Y2 relief valve 15, and PG2 pressure sensor 30 enable precise control of the oil volume in the connecting cavity. When there is too much oil in the connecting cavity, the excess oil is discharged through the coordinated operation of the electromagnetic cartridge ball valve and the relief valve. When there is insufficient oil in the connecting cavity, the oil volume is supplemented through the control of the two valves. This ensures that the oil in the connecting cavity is replenished or released in a timely manner, so that the pair of cylinders connected in the connecting cavity can move synchronously to their positions, that is, one cylinder extends to its position and the other cylinder retracts to its position, thereby ensuring the stable operation of the cylinders.

[0057] The main valve body 1 has an oil inlet P1 connected to the first hydraulic pump 20, an oil inlet P2 connected to the second hydraulic pump 21, an oil inlet P3 connected to the third hydraulic pump 22, and return ports T1 and T2 connected to the oil tank. The working port A1 is connected to the rod chamber of the left piston rod 2301, the working port B1 is connected to the rod chamber of the right piston rod 2302, the working port A2 is connected to the rodless chamber of the first hydraulic cylinder 24, the working port B2 is connected to the rodless chamber of the second hydraulic cylinder 25, the working port A3 is connected to the rodless chamber of the third hydraulic cylinder 26, the working port B3 is connected to the rodless chamber of the fourth hydraulic cylinder 27, the working port Y1 is connected to the rod chambers of the third hydraulic cylinder 26 and the fourth hydraulic cylinder 27 respectively, and the working port Y2 is connected to the rod chambers of the first hydraulic cylinder 24 and the second hydraulic cylinder 25.

[0058] This paper describes the operation process of the hydraulic system of the dual-action straw baler controlled by the combined valve.

[0059] First, the three solenoid relief valves, P1 (6), P2 (7), and P3 (8), are set to low, medium, and high pressures, respectively. Before operation, all three valves are energized. The motor starts, and the three hydraulic pumps begin working simultaneously. Hydraulic oil flows through the three check valves (P1 (9), P2 (10), and P3 (11)) and enters the inlet chamber of the main valve body 1. The left side of the fourth electro-hydraulic directional valve 5 is energized, and hydraulic oil enters the rodless chamber of the third hydraulic cylinder 26 through the working port A3. The piston rod of the third hydraulic cylinder 26 is pushed out. The entire pushing process is divided into three stages. The first stage is the rapid stage, where all three pumps supply oil to the cylinder simultaneously, resulting in the fastest cylinder speed. As the cylinder advances, the compaction of the straw in the hopper increases, and the thrust gradually increases. As the pressure increases, the pressure in the corresponding hydraulic system also rises. When the pressure exceeds the set pressure of the main valve of the solenoid relief valve 6, the check valve 9 blocks the oil supply from the first hydraulic pump 20 to the system. The oil from the first hydraulic pump 20 can be returned by controlling the bidirectional output hydraulic cylinder 23 through the electro-hydraulic directional valve 2, thereby saving the cylinder action time. After the piston rod of the bidirectional output hydraulic cylinder 23 returns to its position, the return pressure relay sends a signal, the P1 solenoid relief valve 6 is de-energized, and the corresponding first hydraulic pump 20 is unloaded. At this time, the push-out process enters the second stage, with only the second hydraulic pump 21 and the third hydraulic pump 22 remaining. As oil is supplied to the system, the cylinder's forward speed slows down. As the cylinder continues to advance, the thrust increases, and the corresponding hydraulic system pressure rises. When the pressure reaches the set pressure of the P2 solenoid relief valve 7, the pressure relay sends a signal, de-energizing the solenoid relief valve 7. This unloads the second hydraulic pump 21, and the P2 check valve 10 blocks the second hydraulic pump 21 from supplying oil to the system. At this point, the pushing process enters the third stage, with only the third hydraulic pump 22 supplying oil to the system. While the cylinder's forward speed is already very slow, the compaction of the forage in the hopper continues to increase. When the compaction of the hay reaches the required level, the piston rod of the third hydraulic cylinder 26 advances forward to its designated position. Simultaneously, all the hydraulic oil in the rod chamber of the third hydraulic cylinder 26 flows into the rod chamber of the fourth hydraulic cylinder 27, causing the piston rod of the fourth hydraulic cylinder 27 to retract. If the piston rod of the hydraulic cylinder 26 has extended to its designated position but the piston rod of the hydraulic cylinder 27 has not retracted, the control system will detect a signal and control the Y1 cartridge-type solenoid ball valve 12 to open, replenishing oil to the rod chamber of the fourth hydraulic cylinder 27 to ensure the piston rod retracts to its designated position. At this time, the Y1 relief valve 14 provides safety protection. Once the piston rods of the third hydraulic cylinder 26 and the fourth hydraulic cylinder 27 are fully in position, the left-side solenoids of all electro-hydraulic directional valves are de-energized, and the right-side solenoids are energized, initiating the right-side circulation.

[0060] The operation process of the third electro-hydraulic directional valve 4 is the same as that of the fourth electro-hydraulic directional valve 5. Both operate at low pressure, with all three pumps supplying oil simultaneously at the fastest speed. As the pressure increases, the speed gradually decreases. The first hydraulic cylinder 24 and the second hydraulic cylinder 25, controlled by the third electro-hydraulic directional valve 4, are ensured to extend and retract synchronously by means of oil replenishment from the cartridge-type solenoid directional valve 13 and overload protection from the cartridge-type relief valve 15. The detailed control process will not be described in detail here.

[0061] As mentioned above, this control valve body is highly integrated, small in size, and offers greater flexibility and compactness in installation. The control system of this valve body controls the operation of each hydraulic component and precisely controls the oil volume in the connecting chamber of the corresponding hydraulic cylinder to ensure stable operation, thereby ensuring the stable operation of the baling machine and consistent baling quality.

Claims

1. A double-baling action control valve body for a straw baler, comprising a main valve body (1), wherein the main valve body (1) is provided with an oil inlet P1, an oil inlet P2, an oil inlet P3, an oil return port T1, and an oil return port T2, characterized in that: The front end face of the main valve body (1) is fitted with a PG pressure sensor (28), a PG1 pressure sensor (29), a PG2 pressure sensor (30), and a PS1 pressure gauge (31). The main valve body (1) is located near the front end face, with a Y1 electromagnetic cartridge ball valve (12) and an electromagnetic cartridge ball valve (13) at the bottom, a Y1 relief valve (14) on the right side, and a Y2 relief valve (15) and a PS2 pressure gauge (32) on the left side. The bottom of the main valve body (1) is provided with a P1 check valve (9), a P2 check valve (10), and a P3 check valve (11), and is located on the side of the Y1 electromagnetic cartridge ball valve (12) and the electromagnetic cartridge ball valve (13). The side of the Y1 relief valve (14) is provided with a P3 electromagnetic relief valve (8), the side of the Y2 relief valve (15) is provided with a P1 electromagnetic relief valve (6), and the P2 electromagnetic relief valve (7) is provided in correspondence with the P1 electromagnetic relief valve (6) and the P3 electromagnetic relief valve (8). The P2 electromagnetic relief valve (7) is located on the top of the main valve body (1). On the top of the main valve body (1) and the side of the P2 electromagnetic overflow valve (7), four sets of electromagnetic directional valves are arranged side by side: the first electromagnetic directional valve (2), the second electromagnetic directional valve (3), the third electromagnetic directional valve (4), and the fourth electromagnetic directional valve (5); four sets of directional valve core groups are inserted into the main valve body (1): the first directional valve core group (16), the second directional valve core group (17), the third directional valve core group (18), and the fourth directional valve core group (19), and the directional valve core groups are matched with the electromagnetic directional valves one by one; The main valve body (1) has interconnected oil passages inside.

2. The double-baling action control valve body of a straw baler according to claim 1, characterized in that: The front end face of the main valve body (1) is provided with a PG pressure sensor connection port (178), a PG1 pressure sensor connection port (179), a PG2 pressure sensor connection port (180), a PS1 pressure gauge connection port (181), a first oil passage (101), a second oil passage (102), and a third oil passage (103); the left side face is provided with a Y2 overflow valve mounting hole (104), a fourth oil passage (105), a PS2 pressure gauge connection port (182), and a thirty-fifth oil passage (103). 49); The right side is provided with the 33rd oil passage (146), the 34th oil passage (147), and the Y1 overflow valve mounting passage (148); the bottom end face is provided with the Y1 cartridge solenoid ball valve mounting passage (150), the Y2 cartridge solenoid ball valve mounting passage (151), the working oil port Y1, and the working oil port Y2; the ends of the Y1 cartridge solenoid ball valve mounting passage (150) and the Y2 cartridge solenoid ball valve mounting passage (151) are connected to the oil inlet P2, and the first oil passage (101) is connected to P The S2 pressure gauge connection port (182) is connected to the end of the 33rd oil circuit channel (146) and the front end of the Y1 cartridge solenoid ball valve mounting channel (150). The working oil port Y1 passes through the 33rd oil circuit channel (146) and is connected to the end of the Y1 relief valve mounting channel (148). The PG1 pressure sensor connection port (179) is connected to the 33rd oil circuit channel (146) and the front end of the Y1 cartridge solenoid ball valve mounting channel (150). The 34th oil circuit channel (147) passes through the Y1 relief valve mounting channel (182). 48) Connected to the second oil passage (102), the fourth oil passage (105) is connected to the front end of the Y2 cartridge solenoid ball valve mounting passage (151), the working oil port Y2 passes through the fourth oil passage (105) and connects to the end of the Y2 relief valve mounting passage (104), the thirty-fifth oil passage (149) passes through the Y2 relief valve mounting passage (104) and connects to the third oil passage (103), and the PG2 pressure sensor connection port (180) is connected to the fourth oil passage (105) and the working oil port Y2.

3. The double-baling action control valve body of a straw baler according to claim 2, characterized in that: The main valve body (1) has a P1 relief valve main valve core mounting channel (106) on its left side. The P1 relief valve main valve core mounting channel (106) is located on the side of the Y2 relief valve mounting channel (104). The P1 relief valve main valve core mounting channel (106) is matched with the fifth oil passage (107), the sixth oil passage (108), and the forty-second oil passage (161). The main valve body 1 has a P3 relief valve main valve core mounting channel (162) on its right side. The P3 relief valve main valve core mounting channel (162) is located on the side of the Y1 relief valve mounting channel (148). 2) Matching and setting the forty-third oil passage (163), forty-fourth oil passage (164), and forty-sixth oil passage (165); the top end face of the main valve body (1) is provided with a P2 relief valve main valve core mounting passage (110), and the P2 relief valve main valve core mounting passage (110) is matched and set with the seventh oil passage (111) and the eighth oil passage (112); the bottom end face of the main valve body (1) is provided with a P1 check valve mounting passage (152), a P2 check valve mounting passage (153), and a P3 check valve mounting passage (154), which are arranged side by side in the Y1 cartridge solenoid ball valve mounting passage (150) and the Y2 cartridge solenoid ball valve mounting passage (154). The magnetic ball valve mounting hole (151) is located on the side; a first connecting cavity (183) is laterally arranged between the P1 check valve mounting hole (152), the P2 check valve mounting hole (153), and the P3 check valve mounting hole (154); a third connecting cavity (185) is arranged between the P1 overflow valve main valve core mounting hole (106) and the P2 overflow valve main valve core mounting hole (110); a second connecting cavity (184) is arranged between the P2 overflow valve main valve core mounting hole (110) and the P3 overflow valve main valve core mounting hole (162); the P1 check valve mounting hole (152) and the P1 overflow valve main valve core mounting hole (106) are connected. The P2 check valve mounting port (153) is connected to the P2 relief valve main valve core mounting port (110), and the P3 check valve mounting port (154) is connected to the P3 relief valve main valve core mounting port (162); the PG pressure sensor connection port (178) and the PS1 pressure gauge connection port (181) are connected to the first connecting cavity (183). The PG pressure sensor connection port (178) is located between the P2 check valve mounting port (153) and the P3 check valve mounting port (154), and the PS1 pressure gauge connection port (181) is located between the P1 check valve mounting port (152) and the P2 check valve mounting port (153).Oil inlet P1 is connected to the mounting hole (152) of P1 check valve and the mounting hole (106) of P1 relief valve main valve core; oil inlet P2 is connected to the mounting hole (153) of P2 check valve and the mounting hole (110) of P2 relief valve main valve core; oil inlet P3 is connected to the mounting hole (154) of P3 check valve and the mounting hole (162) of P3 relief valve main valve core; oil return port T1 is connected to the third connecting cavity (185); oil return port T2... The first oil passage (101) is connected to the main valve core mounting passage (110) of the P2 relief valve, the second oil passage (102) is connected to the main valve core mounting passage (162) of the P3 relief valve, the third oil passage (103) is connected to the main valve core mounting passage (106) of the P1 relief valve, the forty-second oil passage (161) is connected to the main valve core mounting passage (106) of the P1 relief valve, and the fifth... Oil passage (107) is connected to oil passage (161) forty-second; oil passage (108) is connected to oil passage (185) forth; oil passage (107) and oil passage (108) forth are connected to oil passages of solenoid relief valve (6) P1; oil passage (165) forty-six is ​​connected to main valve core mounting passage (162) of relief valve P3; oil passage (164) forty-four is connected to oil passage (165) forty-six. 5) Connecting: The forty-third oil passage (163) is connected to the second connecting cavity (184); the forty-third oil passage (163) and the forty-fourth oil passage (164) are connected to the oil passage of the P3 electromagnetic relief valve (8); the seventh oil passage (111) is connected to the P2 relief valve main valve core mounting hole (110); the seventh oil passage (111) and the eighth oil passage (112) are connected to the oil passage of the P2 electromagnetic relief valve (7).

4. The double-baling action control valve body of a straw baler according to claim 3, characterized in that: The main valve body (1) has P2 overflow valve main valve core mounting hole (110) side with sequentially arranged connecting holes matching the first electro-hydraulic directional valve (2), the second electro-hydraulic directional valve (3), the third electro-hydraulic directional valve (4), and the fourth electromagnetic directional valve (5); the main valve body (1) has directional valve assembly mounting holes through the left and right sides: first directional valve assembly mounting hole (114), second directional valve assembly mounting hole (115), and third directional valve assembly mounting hole (116). The fourth directional valve assembly mounting channel (117) is matched with the first directional valve assembly mounting channel (114) and the communication channel of the first electro-hydraulic directional valve (2); the second directional valve assembly mounting channel (115) and the communication channel of the second electro-hydraulic directional valve (3) are matched; the third directional valve assembly mounting channel (116) and the communication channel of the third electro-hydraulic directional valve (4) are matched; and the fourth directional valve assembly mounting channel (117) and the communication channel of the fourth electromagnetic directional valve (5) are matched.

5. The double-baling action control valve body of a straw baler according to claim 4, characterized in that: The first directional valve assembly mounting channel (114) is also provided with a fourth connecting channel (186), which connects the two ends of the first directional valve assembly mounting channel (114). The second directional valve assembly mounting channel (115) is also provided with a fifth connecting channel (187), which connects the two ends of the second directional valve assembly mounting channel (115). The third directional valve assembly mounting channel (116) is also provided with a sixth connecting channel (188), which connects the two ends of the third directional valve assembly mounting channel (116). The fourth directional valve assembly mounting channel (117) is also provided with a seventh connecting channel (189), which connects the two ends of the fourth directional valve assembly mounting channel (117).

6. The double-baling action control valve body of a straw baler according to claim 5, characterized in that: The valve body (1) is provided with a 36th oil passage (155) and a 37th oil passage (156) at the bottom, which are connected to the first directional valve assembly mounting passage (114); the main valve body (1) is provided with a working oil port A1 and a working oil port B1 at the bottom, which are connected to the second directional valve assembly mounting passage (115); the main valve body (1) is provided with a working oil port A2 and a working oil port B2 at the bottom, which are connected to the third directional valve assembly mounting passage (116); the main valve body (1) is provided with a working oil port A3 and a working oil port B3 at the bottom, which are connected to the fourth directional valve assembly mounting passage (117).

7. The double-baling action control valve body of a straw baler according to claim 6, characterized in that: The main valve body (1) is provided with a 55th oil passage (175) and a 56th oil passage (176). The 55th oil passage (175) and the 56th oil passage (176) are connected to the fourth connecting cavity (186), the fifth connecting cavity (187), the sixth connecting cavity (188), and the seventh connecting cavity (189).

8. The double-baling action control valve body of a straw baler according to claim 7, characterized in that: The main valve body (1) is also provided with a forty-first oil passage (160), which is connected to the second reversing valve group installation passage (115), the third reversing valve group installation passage (116), and the fourth reversing valve group installation passage (117). The end of the forty-first oil passage (160) is connected to the P2 check valve installation passage (153).

9. The double-baling action control valve body of a straw baler according to claim 8, characterized in that: The internal oil passages of the main valve body (1) are smoothly transitioned by casting.

10. A control system for a double-closing action control valve body of a straw baler according to claims 1-9, comprising a first hydraulic pump (20), a second hydraulic pump (21), a third hydraulic pump (22), an oil tank, a bidirectional output hydraulic cylinder (23), a first hydraulic cylinder (24), a third hydraulic cylinder (26), a second hydraulic cylinder (25), a fourth hydraulic cylinder (27), a main valve body (1), and various hydraulic circuit control components disposed on the main valve body (1), wherein the bidirectional output hydraulic cylinder (23) comprises a left piston rod (2301) and a right piston rod (2302), characterized in that: The first hydraulic pump (20), the second hydraulic pump (21), and the third hydraulic pump (22) are connected to an external oil tank and driven by the engine. Through each branch pipe, the oil in the main pipeline is supplied to the corresponding oil cylinder. The first hydraulic pump (20) is equipped with a P1 check valve (9) and a P1 solenoid relief valve (6) on its oil circuit. The second hydraulic pump (21) is equipped with a P2 check valve (10) and a P2 solenoid relief valve (7) on its oil circuit. The third hydraulic pump (22) is equipped with a P3 check valve (11) and a P3 solenoid relief valve (8) on its oil circuit. (20) The oil circuits of the second hydraulic pump (21) and the third hydraulic pump (22) converge and then divide into three groups of oil circuits to control the actions of each hydraulic cylinder. One group controls the rodless oil chambers of the third hydraulic cylinder (26) and the fourth hydraulic cylinder (27), and a fourth electro-hydraulic directional valve (5) is installed on its oil circuit; another group controls the rodless oil chambers of the first hydraulic cylinder (24) and the second hydraulic cylinder (25), and a third electro-hydraulic directional valve (4) is installed on its oil circuit; and another group controls the two rod oil chambers of the bidirectional output hydraulic cylinder (23), and a second electro-hydraulic directional valve (3) is installed on its oil circuit. The first hydraulic pump (20), the second hydraulic pump (21), and the third hydraulic pump (22) are also equipped with a PS1 pressure gauge (31), a PS2 pressure gauge (32), and a PG pressure sensor (28) in the series oil circuit. The second hydraulic pump (21) also has a branch oil circuit, which is equipped with a first electro-hydraulic directional valve (2). The first electro-hydraulic directional valve (2) is connected to the rod oil chamber oil circuit that controls the bidirectional output hydraulic cylinder (23). The first hydraulic pump (20) is also provided with two branch oil circuits. One branch is connected to the rod chamber of the third hydraulic cylinder (26) and the fourth hydraulic cylinder (27), and the other branch is connected to the rod chamber of the first hydraulic cylinder (24) and the second hydraulic cylinder (25). Y1 cartridge solenoid ball valve (12), Y1 relief valve (14), and PG1 pressure sensor (29) are also provided on the oil circuit connecting the rod chamber of the third hydraulic cylinder (26) and the fourth hydraulic cylinder (27). Y2 cartridge solenoid ball valve (13), Y2 relief valve (15), and PG2 pressure sensor (30) are also provided on the oil circuit connecting the rod chamber of the first hydraulic cylinder (24) and the second hydraulic cylinder (25). The oil inlet P1 is connected to the first hydraulic pump (20), the oil inlet P2 is connected to the second hydraulic pump (21); the oil inlet (P3) is connected to the third hydraulic pump (22), the oil return ports T1 and T2 are connected to the oil tank; the working oil port A1 is connected to the rod chamber of the left piston rod (2301), the working oil port B1 is connected to the rod chamber of the right piston rod (2302), the working oil port A2 is connected to the rodless chamber of the first hydraulic cylinder (24), the working oil port B2 is connected to the rodless chamber of the second hydraulic cylinder (25), the working oil port A3 is connected to the rodless chamber of the third hydraulic cylinder (26), the working oil port B3 is connected to the rodless chamber of the fourth hydraulic cylinder (27), the working oil port Y1 is connected to the rod chambers of the third hydraulic cylinder (26) and the fourth hydraulic cylinder (27) respectively, and the working oil port Y2 is connected to the rod chambers of the first hydraulic cylinder (24) and the second hydraulic cylinder (25). The right piston rod (2302), the first hydraulic cylinder (24), and the third hydraulic cylinder (26) of the bidirectional output hydraulic cylinder (23) control the baling operation of straw at one workstation, while the left piston rod (2301), the second hydraulic cylinder (25), and the fourth hydraulic cylinder (27) of the bidirectional output hydraulic cylinder (23) control the baling operation of straw at another workstation, and the two workstations alternately carry out baling operations.

Images