Hydraulic control system of block making machine
By using a combination of check valves and solenoid directional valves in the hydraulic control system of the block forming machine's die head and mold box, the simultaneous movement of the die head and mold box is prevented, thus eliminating the risk of impact and improving safety and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-03-13
AI Technical Summary
Existing block forming machines are prone to collisions when the mold head and mold box move simultaneously, which can lead to safety accidents and may affect product quality.
By connecting a check valve in parallel between the rod-side and rodless chambers of the die head cylinder, and using a first three-position four-way solenoid directional valve to control the hydraulic check valves of the die head and the die box, they cannot move freely simultaneously, achieving self-locking and preventing impact. Simultaneously, the parallel connection of the check valve between the rod-side and rodless chambers of the die head cylinder prevents piston rod rebound and returns hydraulic oil to the tank, improving system stability.
This ensures the operational safety and stability of the system, prevents impact between the mold head and the mold box, and improves product quality and the smoothness of system operation.
Smart Images
Figure CN121654635A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of block forming machine technology, and in particular to a hydraulic control system for a block forming machine. Background Technology
[0002] A block forming machine is a machine that uses materials such as fly ash, river sand, gravel, stone powder, fly ash, waste ceramsite slag, and smelting slag, with a small amount of cement added, to produce new wall material blocks.
[0003] Most existing block forming machines use hydraulic forming, that is, they are driven by oil cylinders, such as feeding plate forward and backward, pressing head lifting, demolding lifting, material cart forward and backward, etc. Summary of the Invention
[0004] In view of this, the purpose of this application is to provide a hydraulic control system for a block forming machine.
[0005] Based on the above objectives, this application provides a hydraulic control system for a block forming machine, comprising: an oil tank unit; a first pump unit, the input end of which is connected to the oil tank unit; and a die head unit, including a die head three-position four-way electro-hydraulic proportional directional valve and a die head cylinder; the oil inlet of the die head three-position four-way electro-hydraulic proportional directional valve is connected to the output end of the first pump unit, the oil return port is connected to the oil tank unit, the first working oil port is connected to the rodless chamber of the die head cylinder, and the second working oil port is connected to the rod chamber of the die head cylinder; a die head hydraulically controlled check valve is connected in series between the rod chamber of the die head cylinder and the die head three-position four-way electro-hydraulic proportional directional valve; and a first... A check valve; a mold box unit, including a mold box three-position four-way electro-hydraulic directional valve and a mold box cylinder, wherein the oil inlet of the mold box three-position four-way electro-hydraulic directional valve is connected to the output end of the first pump unit, the oil return port is connected to the oil tank unit, the first working oil port is connected to the rodless chamber of the mold box cylinder, and the second working oil port is connected to the rod chamber of the mold box cylinder; a mold box hydraulically controlled check valve is connected in series between the rodless chamber of the mold box cylinder and the mold box three-position four-way electro-hydraulic directional valve; a first three-position four-way solenoid directional valve, wherein its first working oil port is connected to the control oil port of the mold head hydraulically controlled check valve, and its second working oil port is connected to the control oil port of the mold box hydraulically controlled check valve; the middle position of the first three-position four-way solenoid directional valve is a Y-type structure.
[0006] Optionally, the hydraulic control system of the block forming machine further includes: a plate feeding unit, comprising a three-position four-way electro-hydraulic proportional directional valve for plate feeding and a plate feeding cylinder, wherein the first working port of the three-position four-way electro-hydraulic proportional directional valve for plate feeding is connected to the rodless chamber of the plate feeding cylinder, the second working port is connected to the rod chamber of the plate feeding cylinder, the inlet port is connected to the output end of the first pump unit, and the return port is connected to the oil tank unit; and a bottom material spreading unit, comprising a three-position four-way electro-hydraulic proportional directional valve for bottom material and a bottom material cylinder, wherein the first working port of the three-position four-way electro-hydraulic proportional directional valve for bottom material ... bottom material cylinder, the second working port is connected to the output end of the first pump unit, and the return port is connected to the oil tank unit; The first working port is connected to the rodless chamber of the bottom material cylinder, the second working port is connected to the rod chamber of the bottom material cylinder, the inlet port is connected to the output end of the first pump unit, and the return port is connected to the oil tank unit; the fabric feeding unit includes a three-position four-way electro-hydraulic proportional directional valve for fabric and a fabric cylinder. The first working port of the three-position four-way electro-hydraulic proportional directional valve for fabric is connected to the rodless chamber of the fabric cylinder, the second working port is connected to the rod chamber of the fabric cylinder, the inlet port is connected to the output end of the first pump unit, and the return port is connected to the oil tank unit.
[0007] Optionally, the hydraulic control system of the block forming machine further includes: a rapid material feeding unit, comprising a three-position four-way electro-hydraulic directional valve and a material feeding cylinder. The first working port of the three-position four-way electro-hydraulic directional valve is connected to the rodless chamber of the material feeding cylinder, the second working port is connected to the rod chamber of the material feeding cylinder, the inlet port is connected to the output end of the first pump unit, and the return port is connected to the oil tank unit. The right position of the three-position four-way electro-hydraulic directional valve is an R-type structure; the right position of the die head three-position four-way electro-hydraulic proportional directional valve is an R-type structure; the right position of the die box three-position four-way electro-hydraulic directional valve is an R-type structure; the right position of the bottom material three-position four-way electro-hydraulic proportional directional valve is an R-type structure; and the right position of the top material three-position four-way electro-hydraulic proportional directional valve is an R-type structure.
[0008] Optionally, a proportional relief valve for the die head is connected in parallel to the rodless chamber of the die head cylinder.
[0009] Optionally, a balance valve is connected in series between the three-position four-way electro-hydraulic proportional directional valve of the die head and the hydraulic control check valve of the die head.
[0010] Optionally, the hydraulic control system of the block forming machine further includes: a second pump unit; a palletizing unit, including a main clamping cylinder, a main clamping three-position four-way solenoid directional valve, a secondary clamping cylinder, and a secondary clamping three-position four-way solenoid directional valve; the first working port of the main clamping three-position four-way solenoid directional valve is connected to the rodless chamber of the main clamping cylinder, the second working port is connected to the rod chamber of the main clamping cylinder, the inlet port is connected to the output end of the second pump unit, and the return port is connected to the oil tank unit; the first working port of the secondary clamping three-position four-way solenoid directional valve is connected to the output end of the second pump unit; the second working port of the secondary clamping three-position four-way solenoid directional valve is connected to the output end of the second pump unit; the third working port of the secondary clamping three-position four-way solenoid directional valve is connected to the output end of the second pump unit; the fourth working port of the secondary clamping three-position four-way solenoid directional valve is connected to the output end of the second pump unit; the fifth working port of the secondary clamping three-position four-way solenoid directional valve is connected to the output end of the second pump unit; the sixth working port of the secondary clamping three-position four-way solenoid directional valve is connected to the output end of the second pump unit; the seventh working port of the secondary clamping three-position four-way solenoid directional valve is connected to the output end of the second pump unit; the eighth working port of the secondary clamping three-position four-way solenoid directional valve is connected to the output end of the second pump unit; the ninth working port of the secondary clamping three-position four-way solenoid directional valve is connected to the output end of the second pump unit; the tenth ... The rodless chamber of the main clamping cylinder is connected, the second working oil port is connected to the rod chamber of the auxiliary clamping cylinder, the oil inlet is connected to the output end of the second pump unit, and the oil return port is connected to the oil tank unit; wherein, a main clamping hydraulic control check valve is connected in series between the rod chamber of the main clamping cylinder and the main clamping three-position four-way solenoid directional valve, and a main clamping accumulator is connected in parallel; an auxiliary clamping hydraulic control check valve is connected in series between the rod chamber of the auxiliary clamping cylinder and the auxiliary clamping three-position four-way solenoid directional valve, and an auxiliary clamping accumulator is connected in parallel; an overflow valve is connected in parallel at the output end of the second pump unit.
[0011] Optionally, the hydraulic control system of the block forming machine further includes: a die head braking unit, comprising a two-position four-way solenoid valve and a braking actuator, wherein the first working port of the two-position four-way solenoid valve is closed, the second working port is connected to the braking actuator, the inlet port is connected to the output end of the first pump unit, and the return port is connected to the oil tank unit; a braking pressure reducing valve is also connected in series between the two-position three-way solenoid valve and the first pump unit; and a fabric base plate unit, comprising a base plate three-position four-way solenoid valve and a base plate cylinder, wherein the first working port of the base plate three-position four-way solenoid valve is connected to the rodless chamber of the base plate cylinder, the second working port is connected to the rod chamber of the base plate cylinder, the inlet port is connected to the output end of the first pump unit, and the return port is connected to the oil tank unit.
[0012] Optionally, the hydraulic control system of the block forming machine further includes: an internal lowering plate unit, comprising a three-position four-way solenoid valve for lowering the plate and a lowering plate cylinder. The first working port of the three-position four-way solenoid valve for lowering the plate is connected to the rod chamber of the lowering plate cylinder, the second working port is connected to the rodless chamber of the lowering plate cylinder, the inlet port is connected to the output end of the first pump unit, and the return port is connected to the oil tank unit. The middle position of the three-position four-way solenoid valve for lowering the plate has a Y-shaped structure. A first hydraulically controlled check valve for lowering the plate is connected in series between the rod chamber of the lowering plate cylinder and the three-position four-way solenoid valve for lowering the plate, and a second hydraulically controlled check valve for lowering the plate is connected in series between the rodless chamber of the lowering plate cylinder and the three-position four-way solenoid valve for lowering the plate. The control port of the first hydraulically controlled check valve for lowering the plate is connected in parallel with the second working port of the three-position four-way solenoid valve for lowering the plate, and the control port of the second hydraulically controlled check valve for lowering the plate is connected in parallel with the first working port of the three-position four-way solenoid valve for lowering the plate.
[0013] Optionally, the first pump unit includes a first sub-oil pump and a second sub-oil pump; the hydraulic control system of the block molding machine also includes a two-position four-way electro-hydraulic directional valve of the first pump unit, wherein the first working oil port is closed, the second working oil port is connected to the output end of the second sub-oil pump, the oil inlet is connected to the output end of the first sub-oil pump, and the oil return port is closed.
[0014] Optionally, the control return port of the first pump group's two-position four-way electro-hydraulic directional valve, the return port of the first three-position four-way solenoid directional valve, the control return port of the supply plate's three-position four-way electro-hydraulic proportional directional valve, the control return port of the fabric's three-position four-way electro-hydraulic directional valve, the control return port of the mold head's three-position four-way electro-hydraulic proportional directional valve, the control return port of the mold box's three-position four-way electro-hydraulic directional valve, the control return port of the bottom material's three-position four-way electro-hydraulic proportional directional valve, and the control return port of the top material's three-position four-way electro-hydraulic proportional directional valve are all connected to the oil tank unit.
[0015] As can be seen from the above, the hydraulic control system of the block forming machine provided in this application connects a mold head hydraulic control check valve in series in the rod chamber of the mold head cylinder and a mold box hydraulic control check valve in series in the rodless chamber of the mold box cylinder. The first three-position four-way solenoid directional valve controls the mold head hydraulic control check valve and the mold box hydraulic control check valve, thereby controlling the operation of the mold head cylinder and the mold box cylinder, so that the two cannot move freely at the same time, so as to achieve self-locking and ensure the operational safety of the system.
[0016] Meanwhile, a first check valve is connected in parallel between the rod chamber and the rodless chamber of the die head cylinder. When the piston rod of the die head cylinder is passively retracted, the hydraulic oil in the rodless chamber can be quickly replenished to the rod chamber through the first check valve, which can effectively prevent the piston rod of the die head cylinder from rebounding and ensure the stable operation of the system.
[0017] In addition, the return ports of the three-position four-way electro-hydraulic proportional directional valve of the mold head and the three-position four-way electro-hydraulic directional valve of the mold box are connected to the oil tank unit, so that the hydraulic oil can return to the oil tank independently, which greatly improves the stability of the system operation. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 2This is a partial schematic diagram of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 3 This is a schematic diagram of the die head unit, die box unit, and related components of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 4 This is a schematic diagram of the die head unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 5 This is a schematic diagram of the mold box unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 6 This is a schematic diagram of the cooling unit and oil tank unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 7 This is a schematic diagram of the filter unit and oil tank unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 8 This is a schematic diagram of the oil tank unit, the first pump group unit, and the pilot oil supply unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 9 This is a schematic diagram of the plate feeding unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 10 This is a schematic diagram of the bottom material feeding unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 11 This is a schematic diagram of the fabric feeding unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 12 This is a schematic diagram of the rapid feeding unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 13 This is a schematic diagram of the palletizer unit and the second pump unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 14 This is a schematic diagram of the die head braking unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 15 This is a schematic diagram of the fabric base plate unit of the hydraulic control system of the block forming machine according to an embodiment of this application; Figure 16 This is a schematic diagram of the internal lowering plate unit of the hydraulic control system of the block forming machine according to an embodiment of this application. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.
[0021] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components described in these embodiments do not limit the scope of this application.
[0022] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.
[0023] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.
[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0025] The applicant's research found that in block forming machines, the die head and die box are nested in vertical space. If both move freely at the same time, the risk of collision is high, which could easily cause safety accidents. Furthermore, if the die head and die box move freely simultaneously, the die head may begin to move before the die box reaches the target position, potentially negatively impacting product quality.
[0026] In view of this, such as Figure 1 , Figure 3 , Figure 4 and Figure 5This application provides a hydraulic control system for a block forming machine (hereinafter referred to as the system), including: an oil tank unit 100; a first pump group unit 500, the input end of which is connected to the oil tank unit 100; and a die head unit 1100, including a die head three-position four-way electro-hydraulic proportional directional valve 1101 and a die head cylinder 1102; the oil inlet (P) of the die head three-position four-way electro-hydraulic proportional directional valve 1101 is connected to the output end of the first pump group unit 500, the oil return port (T) is connected to the oil tank unit 100, the first working oil port (A) is connected to the rodless chamber of the die head cylinder 1102, and the second working oil port (B) is connected to the rod chamber of the die head cylinder 1102; a die head hydraulic control check valve 1106 is connected in series between the rod chamber of the die head cylinder 1102 and the die head three-position four-way electro-hydraulic proportional directional valve 1101; and the rod chamber and the rodless chamber of the die head cylinder 1102 are connected in parallel. There is a first check valve 1103; a mold box unit 1300, including a mold box three-position four-way electro-hydraulic directional valve 1301 and a mold box cylinder 1302. The oil inlet of the mold box three-position four-way electro-hydraulic directional valve 1301 is connected to the output end of the first pump group unit 500, the oil return port is connected to the oil tank unit 100, the first working oil port is connected to the rodless chamber of the mold box cylinder 1302, and the second working oil port is connected to the rod chamber of the mold box cylinder 1302. A mold box hydraulic control check valve 1304 is connected in series between the rodless chamber of the mold box cylinder 1302 and the mold box three-position four-way electro-hydraulic directional valve 1301; a first three-position four-way solenoid directional valve 1600, whose first working oil port is connected to the control oil port of the mold head hydraulic control check valve 1106, and its second working oil port is connected to the control oil port of the mold box hydraulic control check valve 1304; the middle position of the first three-position four-way solenoid directional valve 1600 is a Y-type structure.
[0027] For example, such as Figure 6 The oil tank unit 100 includes an oil tank 101 for containing hydraulic oil. The oil tank 101 is equipped with an air filter 102 for filtering air, a level sensor 103 for monitoring the liquid level in the oil tank 101, a temperature sensor 104 for monitoring the temperature of the hydraulic oil in the oil tank 101, and a visual level gauge 105 for monitoring the liquid level. An oil drain port is provided at the bottom of the oil tank 101 to facilitate subsequent maintenance of the oil tank 101. An oil drain ball valve 106 is installed at the oil drain port.
[0028] For example, such as Figure 8 The input end of the first pump unit 500 can be connected to the oil tank 101 via a butterfly valve 202 for oil suction. The butterfly valve 202 has a switching protection function. A vibration damper 203 is also connected in series between the butterfly valve 202 and the input end of the first pump unit 500. A one-way valve 204 is connected in series at the output end of the first pump unit 500.
[0029] For example, the control return port of the mold head hydraulic check valve 1106 is connected to the oil tank unit 100, and the control return port of the mold box hydraulic check valve 1304 is connected to the oil tank unit 100.
[0030] For example, the rodless chamber and the rod chamber of the mold box cylinder 1302 are respectively connected in series with throttle valves 1303 to control the speed of the mold box cylinder 1302.
[0031] It should be noted that the left position of the first three-position four-way solenoid directional valve 1600 is connected to the second working port and the return port is connected to the first working port; the right position is connected to the first working port and the return port is connected to the second working port.
[0032] It should be noted that, taking the mold head cylinder 1102 as an example, the internal space of the mold head cylinder 1102 is divided into a rod chamber and a rodless chamber by the piston, and the piston rod connected to the piston is located in the rod chamber.
[0033] like Figure 8 The system also includes a pilot oil supply unit 600. The input end of the pilot oil supply unit 600 is connected in parallel with the output end of the first pump unit 500. From the input end to the output end, the pilot oil supply unit 600 is connected in series with a throttle valve 1303, a filter 205, and a pressure reducing valve 601 to ensure the cleanliness of the hydraulic oil flowing through the pilot oil supply unit 600 and to control the output pressure of the pilot oil supply unit 600. Simultaneously, an accumulator 602, a pressure gauge 603, and a pressure sensor 604 are connected in parallel to ensure the stability of the output pressure of the pilot oil supply unit 600 and to enable real-time monitoring of the output pressure.
[0034] The oil inlet of the first three-position four-way solenoid directional valve 1600, the control oil inlet of the mold head three-position four-way electro-hydraulic proportional directional valve 1101, and the control oil inlet of the mold box three-position four-way electro-hydraulic directional valve 1301 are all connected to the output end of the pilot oil supply unit 600.
[0035] When the hydraulic control check valve 1106 of the die head is closed, the hydraulic oil in the rod chamber of the die head cylinder 1102 cannot be discharged. When the hydraulic control check valve 1304 of the die box is closed, the hydraulic oil in the rodless chamber of the die box cylinder 1302 cannot be discharged.
[0036] by Figure 3 Taking the structure shown as an example, when the first three-position four-way solenoid directional valve 1600 is in the left position, the mold box hydraulic control check valve 1304 is open, the mold box cylinder 1302 can move freely, and the mold head hydraulic control check valve 1106 is closed. When the first three-position four-way solenoid directional valve 1600 is in the right position, the mold head hydraulic control check valve 1106 is open, the mold head cylinder 1102 can move freely, and the mold box hydraulic control check valve 1304 is closed. When the first three-position four-way solenoid directional valve 1600 is in the middle position, both the mold head hydraulic control check valve 1106 and the mold box hydraulic control check valve 1304 are closed.
[0037] It should be noted that the piston rods of both the mold head cylinder 1102 and the mold box cylinder 1302 can extend downwards. During brick demolding, the piston rod of the mold box cylinder 1302 retracts, actively driving the mold box upwards. The mold box pushes against the mold head, causing the piston rod of the mold head cylinder 1102 to retract passively. Since a first check valve 1103 is connected in parallel between the rod-side and rodless sides of the mold head cylinder 1102, the hydraulic oil in the mold head cylinder 1102 can flow from the rodless side to the rod-side side through the first check valve 1103, achieving rapid oil replenishment. This prevents the piston rod of the mold head cylinder 1102 from rebounding, ensuring stable system operation.
[0038] In the system provided in this embodiment, a hydraulically controlled check valve 1106 is connected in series in the rod-side cavity of the die head cylinder 1102, and a hydraulically controlled check valve 1304 is connected in series in the rodless cavity of the die box cylinder 1302. The die head hydraulically controlled check valve 1106 and the die box hydraulically controlled check valve 1304 are controlled by a first three-position four-way solenoid directional valve 1600, thereby controlling the operation of the die head cylinder 1102 and the die box cylinder 1302, so that the two cannot move freely at the same time, thereby achieving self-locking and ensuring the operational safety of the system.
[0039] Meanwhile, a first check valve 1103 is connected in parallel between the rod chamber and the rodless chamber of the die head cylinder 1102. When the piston rod of the die head cylinder 1102 is passively retracted, the hydraulic oil in the rodless chamber can be quickly replenished to the rod chamber through the first check valve 1103, which can effectively prevent the piston rod of the die head cylinder 1102 from rebounding and ensure the stable operation of the system.
[0040] In addition, the return ports of the three-position four-way electro-hydraulic proportional directional valve 1101 of the mold head and the three-position four-way electro-hydraulic directional valve 1301 of the mold box are connected to the oil tank unit 100, so that the hydraulic oil can return to the oil tank 101 independently, which greatly improves the stability of the system operation.
[0041] The applicant's research found that the block molding machine pressurizes the material in the mold box through the die head cylinder 1102, and the pressurization cycle is relatively short, generally not exceeding 100mm. However, due to structural limitations, the total stroke of the die head cylinder 1102 is very large, and the piston area is also very large. In order to shorten the pressurization cycle, the power of the pump unit driving the die head cylinder 1102 is usually increased. However, this results in significant overflow losses in the system during slow pressurization, causing severe system overheating and affecting the reliable operation of the system.
[0042] In view of this, such as Figure 4 In some embodiments, the right position of the three-position four-way electro-hydraulic proportional directional valve 1101 of the mold head is an R-type structure (i.e., the oil inlet, the first working oil port and the second working oil port are connected, and the oil return port is closed).
[0043] It should be noted that the left position of the three-position four-way electro-hydraulic proportional directional valve 1101 of the mold head is connected to the second working oil port and the return oil port is connected to the first working oil port; the middle position is an O-type structure.
[0044] Combination Figure 4 When the three-position four-way electro-hydraulic proportional directional valve 1101 of the die head is in the right position, the oil inlet, the first working oil port, and the second working oil port are connected, so that the rod chamber and the rodless chamber of the die head cylinder 1102 form a differential connection. When the piston rod of the die head cylinder 1102 extends, the oil in the rod chamber can be quickly replenished to the rodless chamber through the three-position four-way electro-hydraulic proportional directional valve 1101, so that the piston of the die head cylinder 1102 can move quickly toward the rod chamber, that is, the piston rod of the die head cylinder 1102 can be quickly extended. Compared with the method of achieving the rapid extension of the die head cylinder 1102 by increasing the power of the pump set, this embodiment has a smaller power requirement for the pump set, which helps to reduce the power and energy consumption of the system, reduce the heat generation of the system, and ensure the stable operation of the system.
[0045] The block molding machine presses material in a mold box to form the block. The mold box is placed on a pallet. After pressing, the mold box needs to be lifted, and the formed block is pushed out along with the pallet. Lifting and lowering the mold box is achieved by a mold box cylinder 1302. Due to structural limitations, the mold box cylinder 1302 is quite large and two cylinders need to be symmetrically arranged. The load borne by the mold box cylinder 1302 is mainly the weight of the mold box and the friction between the mold box and the block; this load is relatively small. To shorten the molding cycle, the displacement of the pump unit driving the mold box cylinder 1302 is usually increased, thereby increasing the power.
[0046] In view of this, such as Figure 5 In some embodiments, the right position of the three-position four-way electro-hydraulic directional valve 1301 is an R-type structure.
[0047] The beneficial effects achieved by the right position of the three-position four-way electro-hydraulic directional valve 1301 of the mold box being of the R-type structure are similar to those achieved by the right position of the three-position four-way electro-hydraulic proportional directional valve 1101 of the mold head being of the R-type structure, and will not be elaborated here.
[0048] In some embodiments, such as Figure 6 The system also includes a cooling unit 300, which can automatically perform cooling based on the real-time temperature collected by the temperature sensor 104 and the preset target temperature.
[0049] In some embodiments, such as Figure 7The system also includes a filtration unit 200, which includes a filter motor pump assembly 201. The input end of the filter motor pump assembly 201 is connected to a butterfly valve 202 located in the oil tank 101 for oil suction. The butterfly valve 202 has a switching protection function. A vibration damper 203 is also connected in series between the butterfly valve 202 and the filter motor pump assembly 201. The output end of the filter motor pump assembly 201 is divided into two paths by a check valve 204. One path is directly connected to the oil tank 101 through a filter 205, and the other path is connected to the oil tank 101 through an overflow valve 206.
[0050] like Figure 1 , Figure 2 and Figure 9 In some embodiments, the system further includes a plate feeder unit 700, which includes a three-position four-way electro-hydraulic proportional directional valve 701 and a plate feeder cylinder 702. The first working port of the three-position four-way electro-hydraulic proportional directional valve 701 is connected to the rodless chamber of the plate feeder cylinder 702, the second working port is connected to the rod chamber of the plate feeder cylinder 702, the oil inlet is connected to the output end of the first pump unit 500, and the oil return port is connected to the oil tank unit 100.
[0051] For example, the middle position of the three-position four-way electro-hydraulic proportional directional valve 701 is an O-type structure, the left position is connected to the second working oil port and the return oil port is connected to the first working oil port; the right position is connected to the first working oil port and the return oil port is connected to the second working oil port.
[0052] The speed of the supply plate cylinder 702 can be precisely adjusted by the three-position four-way electro-hydraulic proportional directional valve 701. The return port of the supply plate cylinder 701 is connected to the oil tank unit 100 so that the hydraulic oil can return to the oil tank 101 independently, which greatly improves the stability of the system operation.
[0053] like Figure 1 , Figure 2 and Figure 10 In some embodiments, the system further includes: a base material distribution unit 1400, including a base material three-position four-way electro-hydraulic proportional directional valve 1401 and a base material cylinder 1402. The first working port of the base material three-position four-way electro-hydraulic proportional directional valve 1401 is connected to the rodless chamber of the base material cylinder 1402, the second working port is connected to the rod chamber of the base material cylinder 1402, the oil inlet is connected to the output end of the first pump unit 500, and the oil return port is connected to the oil tank unit 100.
[0054] For example, the middle position of the bottom material three-position four-way electro-hydraulic proportional directional valve 1401 is an O-type structure, the left position is an oil inlet connected to the second working oil port, and the oil return port is connected to the first working oil port.
[0055] The speed of the bottom material cylinder 1402 can be precisely adjusted by the bottom material three-position four-way electro-hydraulic proportional directional valve 1401. The return port of the bottom material three-position four-way electro-hydraulic proportional directional valve 1401 is connected to the oil tank unit 100 so that the hydraulic oil can return to the oil tank 101 independently, which greatly improves the stability of the system operation.
[0056] like Figure 1 , Figure 2 and Figure 10 In some embodiments, the right position of the bottom material three-position four-way electro-hydraulic proportional directional valve 1401 is an R-type structure.
[0057] The beneficial effects achieved by the right position of the three-position four-way electro-hydraulic proportional directional valve 1401 of the base material being of the R-type structure are similar to those achieved by the right position of the three-position four-way electro-hydraulic proportional directional valve 1101 of the die head being of the R-type structure, and will not be elaborated here.
[0058] like Figure 1 , Figure 2 and Figure 11 In some embodiments, the system further includes: a fabric unit 1500, including a three-position four-way electro-hydraulic proportional directional valve 1501 and a fabric cylinder 1502. The first working port of the three-position four-way electro-hydraulic proportional directional valve 1501 is connected to the rodless chamber of the fabric cylinder 1502, the second working port is connected to the rod chamber of the fabric cylinder 1502, the oil inlet is connected to the output end of the first pump unit 500, and the oil return port is connected to the oil tank unit 100.
[0059] For example, the middle position of the three-position four-way electro-hydraulic proportional directional valve 1501 is an O-type structure, the left position is an oil inlet connected to the second working oil port, and the oil return port is connected to the first working oil port.
[0060] The speed of the fabric cylinder 1502 can be precisely adjusted by the three-position four-way electro-hydraulic proportional directional valve 1501. The return port of the fabric three-position four-way electro-hydraulic proportional directional valve 1501 is connected to the oil tank unit 100 so that the hydraulic oil can return to the oil tank 101 independently, which greatly improves the stability of the system operation.
[0061] like Figure 1 , Figure 2 and Figure 11 In some embodiments, the right position of the fabric three-position four-way electro-hydraulic proportional directional valve 1501 is an R-type structure.
[0062] The beneficial effects achieved by the right position of the three-position four-way electro-hydraulic proportional directional valve 1501 for fabric being of the R-type structure are similar to those achieved by the right position of the three-position four-way electro-hydraulic proportional directional valve 1101 for die head being of the R-type structure, and will not be elaborated further here.
[0063] like Figure 1 , Figure 2 and Figure 12 In some embodiments, the system further includes: a rapid fabric spreading unit 1000, comprising a three-position four-way electro-hydraulic directional valve 1001 and a fabric spreading cylinder 1002. The first working port of the three-position four-way electro-hydraulic directional valve 1001 is connected to the rodless chamber of the fabric spreading cylinder 1002, the second working port is connected to the rod chamber of the fabric spreading cylinder 1002, the inlet port is connected to the output end of the first pump unit 500, and the return port is connected to the oil tank unit 100. The right position of the three-position four-way electro-hydraulic directional valve 1001 is an R-type structure.
[0064] For example, a throttle valve 1303 is connected in series between the rod chamber of the fabric cylinder 1002 and the three-position four-way electro-hydraulic directional valve 1001, and a throttle valve 1303 is also connected in series between the rodless chamber of the fabric cylinder 1002 and the three-position four-way electro-hydraulic directional valve 1001. The speed of the fabric cylinder 1002 can be adjusted by the throttle valve 1303.
[0065] The beneficial effects achieved by the right position of the three-position four-way electro-hydraulic directional valve 1001 for fabric being of the R-type structure are similar to those achieved by the right position of the three-position four-way electro-hydraulic proportional directional valve 1101 for the die head being of the R-type structure, and will not be elaborated further here.
[0066] The return port of the three-position four-way electro-hydraulic directional valve 1001 is connected to the oil tank unit 100, so that the hydraulic oil can return to the oil tank 101 independently, which greatly improves the stability of the system operation.
[0067] like Figure 4 In some embodiments, the rodless chamber of the die head cylinder 1102 is connected in parallel with a die head proportional relief valve 1104.
[0068] For example, a pressure sensor 604 is connected in parallel to the rodless chamber of the die head cylinder 1102.
[0069] It should be noted that the oil inlet of the die head proportional overflow valve 1104 is connected to the rodless chamber of the die head cylinder 1102, and the oil return port is connected to the oil tank unit 100.
[0070] An electrical signal is input to the proportional solenoid of the die head proportional relief valve 1104 via an external controller (e.g., a PLC) to set the opening pressure of the die head proportional relief valve 1104. When the pressure in the rodless chamber of the die head cylinder 1102 is lower than the opening pressure of the die head proportional relief valve 1104, the die head proportional relief valve 1104 closes, and all the hydraulic oil output from the first working port of the die head three-position four-way electro-hydraulic proportional directional valve 1101 enters the rodless chamber of the die head cylinder 1102. When the pressure is higher than the opening pressure of the die head proportional relief valve 1104, the die head proportional relief valve 1104 opens, guiding the excess hydraulic oil back to the oil tank 101, so that the pressure in the rodless chamber of the die head cylinder 1102 drops below the aforementioned opening pressure.
[0071] Based on the above, it can be seen that setting the mold head proportional overflow valve 1104 can limit the maximum pressure of the rodless chamber of the mold head cylinder 1102, making it easier to control the demolding force of the brick, so as to make the system run more smoothly and help improve the product yield.
[0072] like Figure 4 In some embodiments, a balance valve 1105 is connected in series between the three-position four-way electro-hydraulic proportional directional valve 1101 and the hydraulic control check valve 1106 of the mold head.
[0073] The rod chamber of the die head cylinder 1102 is connected in series with a balance valve 1105, which can make the die head descend more smoothly during the process of pressing the material down, thus helping the system to operate smoothly.
[0074] like Figure 1 and Figure 13 In some embodiments, the system further includes: a second pump unit 1700; a palletizer unit 400, including a main clamping cylinder 401, a main clamping three-position four-way solenoid valve 402, a secondary clamping cylinder 403, and a secondary clamping three-position four-way solenoid valve 404; the first working port of the main clamping three-position four-way solenoid valve 402 is connected to the rodless chamber of the main clamping cylinder 401, the second working port is connected to the rod chamber of the main clamping cylinder 401, the inlet port is connected to the output end of the second pump unit 1700, and the return port is connected to the oil tank unit 100; the first working port of the secondary clamping three-position four-way solenoid valve 404 is connected to the secondary clamping cylinder 403. The rodless chamber of the main clamping cylinder 401 is connected to the rod chamber of the auxiliary clamping cylinder 403, the oil inlet is connected to the output end of the second pump unit 1700, and the oil return port is connected to the oil tank unit 100. Among them, a main clamping hydraulic control check valve 405 is connected in series between the rod chamber of the main clamping cylinder 401 and the main clamping three-position four-way solenoid directional valve 402, and a main clamping accumulator 406 is connected in parallel. A secondary clamping hydraulic control check valve 407 is connected in series between the rod chamber of the auxiliary clamping cylinder 403 and the secondary clamping three-position four-way solenoid directional valve 404, and a secondary clamping accumulator 408 is connected in parallel. An overflow valve 206 is connected in parallel at the output end of the second pump unit 1700.
[0075] For example, the input terminal of the second pump unit 1700 can be connected to the oil tank 101 via a butterfly valve 202 disposed on the oil tank 101 for oil suction. The butterfly valve 202 has a switching protection function. A vibration damper 203 is also connected in series between the butterfly valve 202 and the input terminal of the second pump unit 1700. A one-way valve 204 is connected in series at the output terminal of the second pump unit 1700, and an accumulator group 1701 is connected in parallel to maintain a stable output pressure of the second pump unit 1700.
[0076] For example, a throttle valve 1303 is connected in series between the main clamp three-position four-way solenoid valve 402 and the rod-side chamber of the main clamp cylinder 401, and between the main clamp three-position four-way solenoid valve 402 and the rodless chamber of the main clamp cylinder 401, to adjust the speed of the main clamp of the palletizer. A throttle valve 1303 is also connected in series between the auxiliary clamp three-position four-way solenoid valve 404 and the rod-side chamber of the main clamp cylinder 401, and between the auxiliary clamp three-position four-way solenoid valve 404 and the rodless chamber of the main clamp cylinder 401, to adjust the speed of the auxiliary clamp of the palletizer.
[0077] For example, the output of the second pump unit 1700 is also connected in parallel with a pressure gauge 603 and a pressure sensor 604.
[0078] The main clamping three-position four-way solenoid directional valve 402 has an O-type structure in the middle position, and in the left position, the oil inlet is connected to the second working oil port and the oil return port is connected to the first working oil port; in the right position, the oil inlet is connected to the first working oil port and the oil return port is connected to the second working oil port. The auxiliary clamping three-position four-way solenoid directional valve 404 has the same structure in the middle, left, and right positions, and will not be described again here.
[0079] The output of the second pump unit 1700 is divided into two paths. One path is connected to the main clamp cylinder 401 through the main clamp three-position four-way solenoid valve 402, and the other path is connected to the auxiliary clamp cylinder 403 through the auxiliary clamp three-position four-way solenoid valve 404.
[0080] A main clamp hydraulic control check valve 405 is connected in series between the rod chamber of the main clamp cylinder 401 and the main clamp three-position four-way solenoid directional valve 402. The control oil inlet of the main clamp hydraulic control check valve 405 is connected in parallel with the rodless chamber of the main clamp cylinder 401. A main clamp accumulator 406 is also connected in parallel to the rod chamber of the main clamp cylinder 401. This ensures that the main clamp remains in a clamping state for a long time without falling off or loosening, which helps to improve the clamping stability of the main clamp. The beneficial effects of the auxiliary clamp hydraulic control check valve 407 and the auxiliary clamp accumulator 408 are similar and will not be described in detail here.
[0081] An overflow valve 206 is connected in parallel at the output end of the second pump unit 1700 to limit the maximum pressure of the second pump unit 1700 and the palletizer unit 400, so as to ensure stable operation of the system.
[0082] like Figure 1 , Figure 2 and Figure 14 In some embodiments, the system further includes: a mold head braking unit 800, including a two-position four-way solenoid valve 801 and a braking actuator 802. The first working port of the two-position four-way solenoid valve 801 is closed, the second working port is connected to the braking actuator 802, the inlet port is connected to the output end of the first pump unit 500, and the return port is connected to the oil tank unit 100. A braking pressure reducing valve 803 is also connected in series between the two-position three-way solenoid valve and the first pump unit 500.
[0083] For example, the brake actuation component 802 may include a brake cylinder.
[0084] For example, a pressure gauge 603 is connected in parallel to the oil inlet of the brake two-position four-way solenoid valve 801 to monitor the unlocking pressure in real time.
[0085] For example, a check valve 204 is connected in series between the return port of the brake two-position four-way solenoid valve 801 and the oil tank unit 100.
[0086] The left position of the two-position four-way solenoid valve 801 connects the oil inlet to the second working oil port and the oil return port to the first working oil port; the right position connects the oil inlet to the first working oil port and the oil return port to the second working oil port.
[0087] The braking and unlocking of the die head are achieved by controlling the two-position four-way solenoid valve 801. The unlocking pressure is set by adjusting the brake pressure reducing valve 803.
[0088] The return port of the two-position four-way solenoid valve 801 is connected to the oil tank unit 100 so that the hydraulic oil can return to the oil tank 101 independently, ensuring the rapid response of the mold head braking.
[0089] like Figure 1 , Figure 2 and Figure 15 In some embodiments, the system further includes: a fabric base plate unit 900, including a base plate three-position four-way solenoid valve 901 and a base plate cylinder 902. The first working port of the base plate three-position four-way solenoid valve 901 is connected to the rodless chamber of the base plate cylinder 902, the second working port is connected to the rod chamber of the base plate cylinder 902, the oil inlet is connected to the output end of the first pump group unit 500, and the oil return port is connected to the oil tank unit 100.
[0090] For example, a throttle valve 1303 is connected in series between the base plate three-position four-way solenoid directional valve 901 and the rod chamber of the base plate cylinder 902, and between the base plate three-position four-way solenoid directional valve 901 and the rodless chamber of the base plate cylinder 902, so as to adjust the speed of the base plate cylinder 902.
[0091] The base plate three-position four-way solenoid directional valve 901 has an O-type structure in the middle position. In the left position, the oil inlet is connected to the second working oil port and the oil return port is connected to the first working oil port. In the right position, the oil inlet is connected to the first working oil port and the oil return port is connected to the second working oil port.
[0092] The return port of the three-position four-way solenoid directional valve 901 on the base plate is connected to the oil tank unit 100, so that the hydraulic oil can return to the oil tank 101 independently, which greatly improves the stability of the system operation.
[0093] like Figure 1 , Figure 2 and Figure 16 In some embodiments, the system further includes: an internal lowering plate unit 1200, comprising a three-position four-way solenoid directional valve 1201 and a lowering plate cylinder 1202. The first working port of the three-position four-way solenoid directional valve 1201 is connected to the rod chamber of the lowering plate cylinder 1202, the second working port is connected to the rodless chamber of the lowering plate cylinder 1202, the inlet port is connected to the output end of the first pump unit 500, and the return port is connected to the oil tank unit 100. The middle position of the three-position four-way solenoid directional valve 1201 is a Y-shaped structure; the lowering plate cylinder 1202... A first lowering plate hydraulic control check valve 1203 is connected in series between the rod chamber of cylinder 2 and the lowering plate three-position four-way solenoid directional valve 1201, and a second lowering plate hydraulic control check valve 1204 is connected in series between the rodless chamber of cylinder 1202 and the lowering plate three-position four-way solenoid directional valve 1201; the control port of the first lowering plate hydraulic control check valve 1203 is connected in parallel with the second working port of the lowering plate three-position four-way solenoid directional valve 1201, and the control port of the second lowering plate hydraulic control check valve 1204 is connected in parallel with the first working port of the lowering plate three-position four-way solenoid directional valve 1201.
[0094] For example, a throttle valve 1303 is provided between the rod chamber of the three-position four-way solenoid directional valve 1201 and the rodless chamber of the cylinder 1202 to adjust the speed of the cylinder 1202.
[0095] The left position of the three-position four-way solenoid directional valve 1201 with lower plate is connected to the second working port and the return port is connected to the first working port; the right position is connected to the first working port and the return port is connected to the second working port.
[0096] When the three-position four-way solenoid directional valve 1201 of the lowering plate is in the neutral position, there is no pressure at the control oil inlet of the first lowering plate hydraulic control check valve 1203 and the second lowering plate hydraulic control check valve 1204. Both are closed, cutting off the oil return path of the rod chamber and the rodless chamber of the lowering plate cylinder 1202, thereby firmly locking the lowering plate cylinder 1202 and preventing accidental movement due to load or its own weight.
[0097] Taking the three-position four-way solenoid directional valve 1201 of the lowering plate as switching to the left position as an example, the pressure oil enters the rodless chamber of the lowering plate cylinder 1202. At the same time, the pressure opens the first hydraulic control check valve 1203 of the lowering plate through the parallel control oil inlet, so that the return oil flows smoothly back to the oil tank 101, and realizes the smooth extension of the lowering plate cylinder 1202.
[0098] The return port of the three-position four-way solenoid directional valve 1201 is connected to the oil tank unit 100, so that the hydraulic oil can return to the oil tank 101 independently, which greatly improves the stability of the system operation.
[0099] like Figure 1 , Figure 2 and Figure 8 In some embodiments, the first pump unit 500 includes a first sub-oil pump 501 and a second sub-oil pump 502; the hydraulic control system of the block molding machine also includes a two-position four-way electro-hydraulic directional valve 1800 of the first pump unit, the first working oil port of which is closed, the second working oil port is connected to the output end of the second sub-oil pump 502, the oil inlet is connected to the output end of the first sub-oil pump 501, and the oil return port is closed.
[0100] For example, such as Figure 8 The input end of the pilot oil supply unit 600 is connected in parallel with the output end of the first sub-oil pump 501 and the output end of the second sub-oil pump 502 through a shuttle valve composed of two one-way valves 204, and oil is discharged from the middle position of the shuttle valve.
[0101] For example, the plate feeding unit 700, the die head braking unit 800, the fabric base plate unit 900, the rapid material replenishment unit and the die head unit 1100 are respectively connected to the output end of the first sub-oil pump 501, and the machine-mounted lowering plate unit 1200, the die box unit 1300, the base material spreading unit 1400 and the fabric spreading unit 1500 are respectively connected to the output end of the second sub-oil pump 502.
[0102] For example, both the first sub-oil pump 501 and the second sub-oil pump 502 are constant pressure variable pumps, which can achieve remote proportional overflow control through an external control valve group and adjust the pressure in real time according to the working conditions.
[0103] For example, pressure gauges 603 are connected in parallel to the output terminals of the first sub-oil pump 501 and the second sub-oil pump 502 to monitor the output pressure in real time.
[0104] The left position of the two-position four-way electro-hydraulic directional valve 1800 of the first pump group connects the oil inlet to the second working oil port and the oil return port to the first working oil port; the right position connects the oil inlet to the first working oil port and the oil return port to the second working oil port. The control oil inlet of the two-position four-way electro-hydraulic directional valve 1800 of the first pump group is connected to the output end of the pilot oil supply unit 600, and the control oil return port is connected to the oil tank unit 100, which can avoid valve group action jamming caused by back pressure.
[0105] When the two-position four-way electro-hydraulic directional valve 1800 of the first pump group is in the left position, the output terminals of the first sub-pump 501 and the second sub-pump 502 merge. If either the first sub-pump 501 or the second sub-pump 502 malfunctions, the malfunctioning sub-pump can be shut off, and the two-position four-way electro-hydraulic directional valve 1800 of the first pump group can be switched to the left position so that the normally operating sub-pump supplies oil to all units in the system.
[0106] When the two-position four-way electro-hydraulic directional valve 1800 of the first pump group is in the right position, the output end of the first sub-oil pump 501 and the output end of the second sub-oil pump 502 are disconnected, and the first sub-oil pump 501 and the second sub-oil pump 502 respectively supply oil to their respective connected units.
[0107] In some embodiments, the control return port of the first pump group two-position four-way electro-hydraulic directional valve 1800, the return port of the first three-position four-way solenoid directional valve 1600, the control return port of the supply plate three-position four-way electro-hydraulic proportional directional valve 701, the control return port of the fabric three-position four-way electro-hydraulic directional valve 1001, the control return port of the die head three-position four-way electro-hydraulic proportional directional valve 1101, the control return port of the die box three-position four-way electro-hydraulic directional valve 1301, the control return port of the bottom material three-position four-way electro-hydraulic proportional directional valve 1401, and the control return port of the fabric three-position four-way electro-hydraulic proportional directional valve 1501 are respectively connected to the oil tank unit 100.
[0108] The return ports or control return ports of the aforementioned valves are connected to the oil tank unit 100, so that the hydraulic oil can return to the oil tank 101 independently, which greatly improves the stability of the system operation.
[0109] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims.
[0110] The various embodiments in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0111] The description in this application is given for illustrative purposes and is not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of this application and to enable those skilled in the art to understand this application and design various embodiments with various modifications suitable for a particular purpose.
[0112] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.
[0113] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.
[0114] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.
Claims
1. A hydraulic control system for a block forming machine, characterized in that, include: Fuel tank unit; The first pump unit has its input end connected to the oil tank unit; The die head unit includes a die head three-position four-way electro-hydraulic proportional directional valve and a die head cylinder; the oil inlet of the die head three-position four-way electro-hydraulic proportional directional valve is connected to the output end of the first pump unit, the oil return port is connected to the oil tank unit, the first working oil port is connected to the rodless chamber of the die head cylinder, and the second working oil port is connected to the rod chamber of the die head cylinder; a die head hydraulic control check valve is connected in series between the rod chamber of the die head cylinder and the die head three-position four-way electro-hydraulic proportional directional valve; a first check valve is connected in parallel between the rod chamber and the rodless chamber of the die head cylinder. The mold box unit includes a mold box three-position four-way electro-hydraulic directional valve and a mold box cylinder. The oil inlet of the mold box three-position four-way electro-hydraulic directional valve is connected to the output end of the first pump group unit, the oil return port is connected to the oil tank unit, the first working oil port is connected to the rodless chamber of the mold box cylinder, and the second working oil port is connected to the rod chamber of the mold box cylinder. A mold box hydraulic control check valve is connected in series between the rodless chamber of the mold box cylinder and the mold box three-position four-way electro-hydraulic directional valve. The first three-position four-way solenoid directional valve has its first working port connected to the control port of the mold head hydraulic control check valve, and its second working port connected to the control port of the mold box hydraulic control check valve; the middle position of the first three-position four-way solenoid directional valve has a Y-type structure.
2. The hydraulic control system for the block forming machine according to claim 1, characterized in that, Also includes: The plate feeding machine unit includes a three-position four-way electro-hydraulic proportional directional valve for plate feeding and a plate feeding cylinder. The first working port of the three-position four-way electro-hydraulic proportional directional valve for plate feeding is connected to the rodless chamber of the plate feeding cylinder, the second working port is connected to the rod chamber of the plate feeding cylinder, the oil inlet is connected to the output end of the first pump unit, and the oil return port is connected to the oil tank unit. The base material distribution unit includes a three-position four-way electro-hydraulic proportional directional valve and a base material cylinder. The first working port of the three-position four-way electro-hydraulic proportional directional valve is connected to the rodless chamber of the base material cylinder, the second working port is connected to the rod chamber of the base material cylinder, the oil inlet is connected to the output end of the first pump unit, and the oil return port is connected to the oil tank unit. The fabric unit includes a three-position four-way electro-hydraulic proportional directional valve and a fabric cylinder. The first working port of the three-position four-way electro-hydraulic proportional directional valve is connected to the rodless chamber of the fabric cylinder, the second working port is connected to the rod chamber of the fabric cylinder, the inlet port is connected to the output end of the first pump unit, and the return port is connected to the oil tank unit.
3. The hydraulic control system for the block forming machine according to claim 2, characterized in that, Also includes: The rapid fabric distribution unit includes a three-position four-way electro-hydraulic directional valve and a fabric distribution cylinder. The first working port of the three-position four-way electro-hydraulic directional valve is connected to the rodless chamber of the fabric distribution cylinder, the second working port is connected to the rod chamber of the fabric distribution cylinder, the oil inlet is connected to the output end of the first pump unit, and the oil return port is connected to the oil tank unit. The right position of the three-position four-way electro-hydraulic directional valve has an R-type structure. The right position of the three-position four-way electro-hydraulic proportional directional valve of the mold head is an R-type structure; The right position of the three-position four-way electro-hydraulic directional valve of the module box has an R-type structure; The right position of the bottom material three-position four-way electro-hydraulic proportional directional valve is an R-type structure; The right position of the three-position four-way electro-hydraulic proportional directional valve of the fabric is an R-type structure.
4. The hydraulic control system for the block forming machine according to claim 1, characterized in that, The rodless chamber of the die head cylinder is connected in parallel with a die head proportional relief valve.
5. The hydraulic control system for the block forming machine according to claim 1, characterized in that, A balance valve is connected in series between the three-position four-way electro-hydraulic proportional directional valve of the die head and the hydraulic control check valve of the die head.
6. The hydraulic control system for the block forming machine according to claim 3, characterized in that, Also includes: Second pump unit; The palletizer unit includes a main clamping cylinder, a main clamping three-position four-way solenoid valve, a secondary clamping cylinder, and a secondary clamping three-position four-way solenoid valve. The first working port of the main clamp three-position four-way solenoid directional valve is connected to the rodless chamber of the main clamp cylinder, the second working port is connected to the rod chamber of the main clamp cylinder, the inlet port is connected to the output end of the second pump unit, and the return port is connected to the oil tank unit; the first working port of the auxiliary clamp three-position four-way solenoid directional valve is connected to the rodless chamber of the auxiliary clamp cylinder, the second working port is connected to the rod chamber of the auxiliary clamp cylinder, the inlet port is connected to the output end of the second pump unit, and the return port is connected to the oil tank unit. Specifically, a main clamp hydraulic control check valve is connected in series between the rod chamber of the main clamp cylinder and the main clamp three-position four-way solenoid directional valve, and a main clamp accumulator is connected in parallel; an auxiliary clamp hydraulic control check valve is connected in series between the rod chamber of the auxiliary clamp cylinder and the auxiliary clamp three-position four-way solenoid directional valve, and an auxiliary clamp accumulator is connected in parallel; an overflow valve is connected in parallel at the output end of the second pump unit.
7. The hydraulic control system for the block forming machine according to claim 6, characterized in that, Also includes: The mold head braking unit includes a two-position four-way solenoid valve and a braking actuator. The first working port of the two-position four-way solenoid valve is closed, the second working port is connected to the braking actuator, the inlet port is connected to the output end of the first pump unit, and the return port is connected to the oil tank unit. A brake pressure reducing valve is also connected in series between the brake two-position three-way solenoid valve and the first pump unit. The fabric base plate unit includes a base plate three-position four-way solenoid valve and a base plate cylinder. The first working port of the base plate three-position four-way solenoid valve is connected to the rodless chamber of the base plate cylinder, the second working port is connected to the rod chamber of the base plate cylinder, the oil inlet is connected to the output end of the first pump unit, and the oil return port is connected to the oil tank unit.
8. The hydraulic control system for the block forming machine according to claim 7, characterized in that, Also includes: The internal lowering plate unit includes a three-position four-way solenoid valve and a lowering plate cylinder. The first working port of the three-position four-way solenoid valve is connected to the rod chamber of the lowering plate cylinder, the second working port is connected to the rodless chamber of the lowering plate cylinder, the oil inlet is connected to the output end of the first pump unit, and the oil return port is connected to the oil tank unit. The middle position of the three-position four-way solenoid valve is a Y-shaped structure. A first hydraulically controlled check valve is connected in series between the rod chamber of the lowering cylinder and the three-position four-way solenoid directional valve of the lowering plate, and a second hydraulically controlled check valve is connected in series between the rodless chamber of the lowering cylinder and the three-position four-way solenoid directional valve of the lowering plate; the control port of the first hydraulically controlled check valve is connected in parallel with the second working port of the three-position four-way solenoid directional valve of the lowering plate, and the control port of the second hydraulically controlled check valve is connected in parallel with the first working port of the three-position four-way solenoid directional valve of the lowering plate.
9. The hydraulic control system for the block forming machine according to claim 8, characterized in that, The first pump unit includes a first sub-oil pump and a second sub-oil pump; The hydraulic control system of the block forming machine also includes a two-position four-way electro-hydraulic directional valve for the first pump group. Its first working oil port is closed, its second working oil port is connected to the output end of the second sub-oil pump, its oil inlet is connected to the output end of the first sub-oil pump, and its return oil port is closed.
10. The hydraulic control system for the electric block forming machine according to claim 9, characterized in that, The control return port of the first pump group's two-position four-way electro-hydraulic directional valve, the return port of the first three-position four-way solenoid directional valve, the control return port of the supply plate's three-position four-way electro-hydraulic proportional directional valve, the control return port of the fabric's three-position four-way electro-hydraulic directional valve, the control return port of the mold head's three-position four-way electro-hydraulic proportional directional valve, the control return port of the mold box's three-position four-way electro-hydraulic directional valve, the control return port of the bottom material's three-position four-way electro-hydraulic proportional directional valve, and the control return port of the fabric's three-position four-way electro-hydraulic proportional directional valve are all connected to the oil tank unit.