Single-mode continuous hydraulic system

Abstract

The utility model relates to a single-mode continuous hydraulic system, which comprises an oil supply assembly and four groups of working assemblies, each working assembly comprises an oil cylinder, the four oil cylinders respectively correspond to a left main die, a right main die, a left sealing die and a right sealing die, and the valve core of a three-position four-way servo valve corresponding to the left main die and the right main die is changed to a first position by electrifying; pressure oil pumped by the oil supply assembly enters rodless cavities of oil cylinders of the left main mold and the right main mold through the first working oil way, piston rods stretch out, the left main mold and the right main mold are closed, and forming of a bottle body part is completed. And the valve elements of the three-position four-way servo valves corresponding to the left main mold and the right main mold are changed to second positions through electrification, so that pressure oil pumped by the oil supply assembly enters rod cavities of the oil cylinders of the left main mold and the right main mold through a second working oil way, the piston rods retract, the left main mold and the right main mold are opened, and demolding of the bottle body part is completed. Similarly, closing and opening of the left sealing mold and the right sealing mold are achieved, and forming and demolding of the head of the bottle body are completed. The actions are repeated, and continuous production of the bottle containers is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, in particular to a single-mode continuous hydraulic system. Background Art

[0002] In the production process of bottle containers, the first step is to place the tube blank extruded from the extruder die head in the bottle body mold. This step is to close the left main mold and the right main mold and maintain pressure for a period of time, so that the tube blank is formed in the bottle body mold by vacuum or blowing. The second step is filling in the already formed bottle body part. The third step is sealing. This step is to close and lock the left sealing mold and the right sealing mold and maintain pressure for a period of time, so that the tube blank is formed in the sealing mold The head of the bottle body is formed to achieve the sealing of the bottle container; completing the above three steps means completing the production of the bottle container. At present, in order to realize the automated production of bottle containers, it is necessary to design a hydraulic system that can continuously implement the above production process.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0004] In view of the deficiencies of the prior art, the embodiment of the utility model discloses a single-mode continuous hydraulic system to meet the needs of continuous production of bottle containers.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A single-mode continuous hydraulic system includes an oil supply component and a working component; the working component has at least four groups, including: an oil cylinder, four oil cylinders are respectively connected to a left main mold, a right main mold, a left sealing mold and a right sealing mold; a three-position four-way servo valve; a first working oil circuit, a first end of which is connected to the A1 port of the three-position four-way servo valve, and a second end is connected to the rodless chamber of the oil cylinder; a second working oil circuit, a first end of which is connected to the B1 port of the three-position four-way servo valve, and a second end is connected to the rod chamber of the oil cylinder; wherein, the oil supply component supplies oil to the P port of all the three-position four-way servo valves, and the oil supply component returns oil through the T port of all the three-position four-way servo valves; when the valve core of the three-position four-way servo valve is in the first position, the P port is connected to the A1 port, and the T port is connected to the B1 port; when the valve core of the three-position four-way servo valve is in the second position, the P port is connected to the B1 port, and the T port is connected to the A1 port.

[0007] Its further technical solution is that the working component includes: a two-position four-way electromagnetic hydraulically controlled one-way valve, including an A2 port and an A3 port, which are arranged at the first end of the two-position four-way electromagnetic hydraulically controlled one-way valve; a B2 port and a B3 port, which are arranged at the second end of the two-position four-way electromagnetic hydraulically controlled one-way valve; wherein, the A2 port and the B2 port of the two-position four-way electromagnetic hydraulically controlled one-way valve are connected to the first working oil circuit, and the A3 port and the B3 port of the two-position four-way electromagnetic hydraulically controlled one-way valve are connected to the second working oil circuit; when the two-position four-way electromagnetic hydraulically controlled one-way valve is powered on, the A2 port is connected to the B2 port, and the A3 port is connected to the B3 port; when the two-position four-way electromagnetic hydraulically controlled one-way valve is powered off, the A2 port is disconnected from the B2 port, and the A3 port is disconnected from the B3 port.

[0008] Its further technical solution is that the oil supply assembly includes: an oil tank; a pressure oil circuit, a first end of which is connected to the oil tank, and a second end is connected to the P port of the three-position four-way servo valve; an oil return circuit, a first end of which is connected to the oil tank, and a second end is connected to the T port of the three-position four-way servo valve; and an oil pump, which is arranged on the pressure oil circuit.

[0009] A further technical solution is that the oil supply assembly also includes: an accumulator, a first end of which is connected to the pressure oil circuit, and a second end of which is connected to the return oil circuit.

[0010] Its further technical solution is that the pressure oil circuit also includes: a high-pressure filter, which is arranged on the pressure oil circuit and is located between the oil pump and the P port of the three-position four-way servo valve; an oil suction filter, which is arranged on the pressure oil circuit and is located in the oil tank; the return oil circuit includes: a return oil filter, which is arranged on the return oil circuit.

[0011] Its further technical solution is that the pressure oil circuit also includes: a first quick connector, which is arranged on the pressure oil circuit and located between the high-pressure filter and the oil pump; the return oil circuit also includes: a second quick connector, which is arranged on the return oil circuit and located between the return oil filter and the T-port of the three-position four-way servo valve.

[0012] A further technical solution is that the oil return circuit also includes: an inserted cooler, which is arranged on the oil return circuit.

[0013] Its further technical solution is that the oil supply assembly also includes: an electromagnetic reversing valve, which is arranged between the pressure oil circuit and the oil return circuit; wherein, when the electromagnetic reversing valve is energized, the pressure oil circuit and the oil return circuit are not connected, and when the electromagnetic reversing valve is de-energized, the pressure oil circuit and the oil return circuit are connected.

[0014] A further technical solution is that the oil supply assembly further includes: a relief valve, which is arranged between the pressure oil circuit and the oil return circuit.

[0015] The beneficial effects of the embodiments of the utility model are as follows:

[0016] (I) The single-mode continuous hydraulic system of the utility model includes an oil supply component and four groups of working components. The working components include oil cylinders. The four oil cylinders correspond to the left main mold, the right main mold, the left sealing mold and the right sealing mold respectively. When the power is turned on, the valve core of the three-position four-way servo valve corresponding to the left main mold and the right main mold is changed to the first position, so that the pressure oil pumped by the oil supply component enters the rodless chamber of the oil cylinder of the left main mold and the right main mold through the first working oil circuit, the piston rod extends, and the rod chamber returns oil to the oil supply component through the second working oil circuit, so that the left main mold and the right main mold are closed, and the molding of the bottle body is completed. When the power is turned on, the valve core of the three-position four-way servo valve corresponding to the left main mold and the right main mold is changed to the second position, so that the pressure oil pumped by the oil supply component enters the rod chamber of the oil cylinder of the left main mold and the right main mold through the second working oil circuit, the piston rod retracts, and the rodless chamber returns oil to the oil supply component through the first working oil circuit, and the left main mold and the right main mold are opened, and the demolding of the bottle body is completed. Similarly, the left sealing mold and the right sealing mold are closed and opened to complete the forming and demoulding of the bottle head. Repeat the actions of closing the left main mold and the right main mold, closing the left sealing mold and the right sealing mold, opening the left main mold and the right main mold, and opening the left sealing mold and the right sealing mold to achieve continuous production of bottle containers.

[0017] (ii) Furthermore, it also includes a two-position four-way electromagnetic hydraulically controlled one-way valve connected to the first working oil circuit and the second working oil circuit. When the valve core of the three-position four-way servo valve is in the middle position or the system is powered off, the valve core of the two-position four-way electromagnetic hydraulically controlled one-way valve is in the second position, and the A2 port is disconnected from the B2 port, and the A3 port is disconnected from the B3 port, thereby realizing the disconnection of the first working oil circuit and the second working oil circuit, ensuring that the pressure and position in the cylinder remain unchanged, thereby meeting production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a connection diagram of working components in the single-mode continuous hydraulic system of the utility model.

[0019] Figure 2 It is a connection relationship diagram of a two-position four-way electromagnetic hydraulically controlled one-way valve and a three-position four-way servo valve in the working assembly of the utility model.

[0020] Figure 3 This is a connection diagram of the oil supply components in the single-mode continuous hydraulic system of the utility model.

[0021] Figure 4 It is an axonometric diagram of the single-mode continuous hydraulic system of the utility model.

[0022] Figure 5 It is a top view structural schematic diagram of the single-mode continuous hydraulic system of the utility model.

[0023] Figure 6 It is a structural schematic diagram of the oil tank in the oil supply assembly of the utility model.

[0024] In the figure:

[0025] 1. Working assembly; 11. First working oil circuit; 12. Second working oil circuit; 13. Two-position four-way electromagnetic hydraulic control one-way valve; 14. Three-position four-way servo valve; 15. Oil cylinder; 151. Piston rod; 152. Rodless chamber; 153. Rod chamber; 2. Oil supply assembly; 21. Oil tank; 211. Liquid level sensor; 212. Liquid level gauge; 213. Temperature sensor; 214. Air filter; 215. Heater; 22. Oil pump; 221. Servo motor; 222. Bell coupling; 23. Accumulator; 231, first high-pressure ball valve; 232, second high-pressure ball valve; 233, second pressure sensor; 24, pressure oil circuit; 241, oil suction filter; 242, first pressure sensor; 243, overflow valve; 244, one-way valve; 245, solenoid reversing valve; 246, high-pressure filter; 247, first quick connector; 25, return oil circuit; 251, return oil filter; 252, plug-in cooler; 253, second quick connector; 26, transition block; 27, oil circuit integrated block. DETAILED DESCRIPTION

[0026] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0027] In order to make the purpose, technical scheme and advantages of the utility model clearer, the device proposed in the utility model is further described in detail below in combination with the accompanying drawings and specific implementation methods. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so it has no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0028] Example:

[0029] This embodiment discloses a single-mode continuous hydraulic system, including an oil supply component 2 and a working component 1.

[0030] Figure 1 This is a connection diagram of the working component 1 in the single-mode continuous hydraulic system of the utility model. Figure 1As shown, the working assembly 1 has four groups, including a cylinder 15, a three-position four-way servo valve 14, a first working oil circuit 11 and a second working oil circuit 12. The four cylinders 15 are respectively connected to the left main mold, the right main mold, the left sealing mold and the right sealing mold. The first end of the first working oil circuit 11 is connected to the A1 port of the three-position four-way servo valve 14, and the second end of the first working oil circuit 11 is connected to the rodless chamber 152 of the cylinder 15. The first end of the second working oil circuit 12 is connected to the B1 port of the three-position four-way servo valve 14, and the second end of the second working oil circuit 12 is connected to the rod chamber 153 of the cylinder. The oil supply assembly 2 supplies oil to the P port of all three-position four-way servo valves 14, and the oil supply assembly 2 returns oil through the T port of all three-position four-way servo valves 14; when the valve core of the three-position four-way servo valve 14 is in the first position, the P port is connected to the A1 port, and the T port is connected to the B1 port; when the valve core of the three-position four-way servo valve 14 is in the second position, the P port is connected to the B1 port, and the T port is connected to the A1 port. Exemplarily, the piston rods 151 of two oil cylinders 15 are connected to the relatively set left main mold and right main mold, and the piston rods 151 of the other two oil cylinders 15 are connected to the relatively set left sealing mold and right sealing mold.

[0031] Figure 2 1 is a connection diagram of a two-position four-way electromagnetic hydraulically controlled one-way valve 13 and a three-position four-way servo valve 14 in the working assembly 1 of the utility model. Figure 2 As shown, further, the working component 1 includes a two-position four-way electromagnetic hydraulically controlled one-way valve 13. The two-position four-way electromagnetic hydraulically controlled one-way valve 13 includes an A2 port and an A3 port arranged at the first end of the two-position four-way electromagnetic hydraulically controlled one-way valve 13, and a B2 port and a B3 port arranged at the second end of the two-position four-way electromagnetic hydraulically controlled one-way valve 13. Among them, the A2 port and the B2 port of the two-position four-way electromagnetic hydraulically controlled one-way valve 13 are connected to the first working oil circuit 11, and the A3 port and the B3 port of the two-position four-way electromagnetic hydraulically controlled one-way valve 13 are connected to the second working oil circuit 12; when the two-position four-way electromagnetic hydraulically controlled one-way valve 13 is powered on, the A2 port is connected to the B2 port, and the A3 port is connected to the B3 port; when the two-position four-way electromagnetic hydraulically controlled one-way valve 13 is powered off, the A2 port is disconnected from the B2 port, and the A3 port is disconnected from the B3 port. Exemplarily, the second position of the valve core of the two-position four-way electromagnetic hydraulically controlled one-way valve 13 is located at ports A2, A3, B2 and B3, and a one-way valve 244 without an oil outlet is set, so that ports A2 and B2, and ports A3 and B3 cannot be connected.

[0032] Figure 3 This is a connection diagram of the oil supply assembly 2 in the single-mode continuous hydraulic system of the utility model. Figure 3As shown, the oil supply assembly 2 includes an oil tank 21, a pressure oil circuit 24, an oil return circuit 25 and an oil pump 22. The first end of the pressure oil circuit 24 is connected to the oil tank 21, and the second end of the pressure oil circuit 24 is connected to the P port of the three-position four-way servo valve 14. The first end of the oil return circuit 25 is connected to the oil tank 21, and the second end of the oil return circuit 25 is connected to the T port of the three-position four-way servo valve 14. The oil pump 22 is arranged on the pressure oil circuit 24. Exemplarily, the oil pump 22 is connected to the servo motor 221 through the bell coupling 222, and the servo motor 221 drives the oil pump 22 to work, and the oil pump 22 extracts the pressure oil from the oil tank 21 and pumps it to the working assembly 1.

[0033] like Figure 3 As shown, further, the oil supply assembly 2 also includes an accumulator 23, the first end of the accumulator 23 is connected to the pressure oil circuit 24, and the second end of the accumulator 23 is connected to the return oil circuit 25. Exemplarily, the accumulator 23 is integrated on the transition block 26, and a first high-pressure ball valve 231 and a second pressure sensor 233 are arranged between the accumulator 23 and the pressure oil circuit 24, and the second pressure sensor 233 detects the oil pressure in the pipeline between the accumulator 23 and the pressure oil circuit 24. A second high-pressure ball valve 232 is arranged between the accumulator 23 and the return oil circuit 25. The accumulator 23 can store and release the pressure in the hydraulic system, so that the operation of the hydraulic system is more stable.

[0034] like Figure 3 As shown, further, the pressure oil circuit 24 also includes a high-pressure filter 246 and an oil suction filter 241. The high-pressure filter 246 is arranged on the pressure oil circuit 24 and is located between the oil pump 22 and the P port of the three-position four-way servo valve 14. The oil suction filter 241 is arranged on the pressure oil circuit 24 and is located in the oil tank 21. The return oil circuit 25 includes a return oil filter 251, which is arranged on the return oil circuit 25. The high-pressure filter 246, the oil suction filter 241 and the return oil filter 251 can play a role in cleaning the oil.

[0035] like Figure 3 As shown, further, the pressure oil circuit 24 also includes a first quick connector 247. The first quick connector 247 is arranged on the pressure oil circuit 24 and is located between the high pressure filter 246 and the oil pump 22. The return oil circuit 25 includes a second quick connector 253, which is arranged on the return oil circuit 25 and is located between the return oil filter 251 and the T port of the three-position four-way servo valve 14. The first quick connector 247 and the second quick connector 253 can realize the quick plugging and unplugging of the pressure oil circuit 24 and the return oil circuit 25, which is convenient for the installation and maintenance of the oil supply component 2 and the working component 1.

[0036] like Figure 3As shown, further, the oil supply assembly 2 further includes an electromagnetic reversing valve 245, which is arranged between the pressure oil circuit 24 and the oil return circuit 25. When the electromagnetic reversing valve 245 is powered on, the pressure oil circuit 24 and the oil return circuit 25 are not connected, and when the electromagnetic reversing valve 245 is powered off, the pressure oil circuit 24 and the oil return circuit 25 are connected. When the system fails or needs maintenance, the electromagnetic reversing valve 245 is powered off, and the pressure oil in the pressure oil circuit 24 returns to the oil tank 21 through the oil return circuit 25, which is convenient for subsequent maintenance and disassembly, and at the same time plays a role in protecting the hydraulic system.

[0037] like Figure 3 As shown, further, the oil supply assembly 2 also includes a relief valve 243, which is arranged between the pressure oil circuit 24 and the return oil circuit 25. The relief valve 243 can automatically open when the hydraulic system is overloaded to ensure the stability of the pressure in the hydraulic system.

[0038] like Figure 3 As shown, further, the oil supply assembly 2 also includes a one-way valve 244, which is arranged on the pressure oil circuit 24 and located at the rear end of the oil pump 22. The one-way valve 244 prevents the pressure oil in the pressure oil circuit 24 from flowing back, thereby protecting the oil pump 22.

[0039] like Figure 3 As shown, further, the oil supply assembly 2 also includes a first pressure sensor 242 arranged on the pressure oil circuit 24 , and the first pressure gauge detects the oil pressure in the pressure oil circuit 24 .

[0040] Furthermore, the oil return line 25 further includes an inserted cooler 252, which is arranged on the oil return line 25. The inserted cooler 252 is easy to install and ensures that the temperature of the hydraulic system is within a normal operating range when it is running.

[0041] Figure 4 It is an axonometric diagram of the single-mode continuous hydraulic system of the utility model. Figure 5 This is a top view of the structure of the single-mode continuous hydraulic system of the utility model. Figure 4 and Figure 5 As shown, further, the first pressure sensor 242, the one-way valve 244, the relief valve 243, the solenoid reversing valve 245, the first quick-connect plug, the second quick-connect plug, the second pressure sensor 233, the first high-pressure ball valve 231, and the second high-pressure ball valve 232 are all integrated in the oil circuit integrated block 27, and the oil circuit integrated block 27 is installed on the oil tank 21. At the same time, the internal circuit of the oil circuit integrated block 27 is connected to the pressure oil circuit 24 and the return oil circuit 25 respectively, which simplifies the installation of the hydraulic system.

[0042] Figure 6 FIG. 2 is a schematic diagram of the structure of the oil tank 21 in the oil supply assembly 2 of the utility model. Figure 3 and Figure 6As shown, further, the oil tank 21 also includes a liquid level sensor 211, a liquid level gauge 212, a temperature sensor 213, an air filter 214 and a heater 215. The liquid level sensor 211 and the liquid level gauge 212 are arranged on the oil tank 21, the liquid level sensor 211 detects the pressure oil level, and the liquid level gauge 212 displays the pressure oil level. The temperature sensor 213 is arranged on the oil tank 21, and the heater 215 is arranged in the oil tank 21. The heater 215 heats the pressure oil to the working temperature, and the temperature sensor 213 detects the temperature of the pressure oil. The air filter 214 is arranged on the oil tank 21 to filter the air inhaled by the oil tank 21 to ensure the cleanliness of the oil.

[0043] When this embodiment is working:

[0044] The three-position four-way servo valve 14 corresponding to the left main mold oil cylinder 15 and the right main mold oil cylinder 15 is energized, and the valve core of the three-position four-way servo valve 14 moves to the first position, at which time the P port is connected to the A1 port, and the T port is connected to the B1 port. The motor is started, and the motor drives the oil pump 22 to extract pressure oil from the oil tank 21. The pressure oil enters the rodless chamber 152 of the left main mold oil cylinder 15 and the right main mold oil cylinder 15 through the pressure oil circuit 24 and the first working oil circuit 11 in turn, so that the piston rod 151 of the oil cylinder 15 extends, and at the same time, the rod chamber 153 of the left main mold oil cylinder 15 and the right main mold oil cylinder 15 returns oil to the oil tank 21 through the second working oil circuit 12 and the return oil circuit 25, until the left main mold and the right main mold are closed, and the pressure is maintained for a certain period of time to complete the molding of the bottle body.

[0045] After the bottle filling is completed, the three-position four-way servo valve 14 corresponding to the left sealing mold oil cylinder 15 and the right sealing mold oil cylinder 15 is energized, and the valve core of the three-position four-way servo valve 14 moves to the second position, at which time the P port is connected to the A1 port, and the T port is connected to the B1 port. The pressure oil enters the rodless chamber 152 of the left sealing mold oil cylinder 15 and the right sealing mold oil cylinder 15 through the pressure oil circuit 24 and the first working oil circuit 11 in turn, so that the piston rod 151 of the oil cylinder 15 extends, and at the same time, the rod chamber 153 of the left sealing mold oil cylinder 15 and the right sealing mold oil cylinder 15 returns oil to the oil tank 21 through the second working oil circuit 12 and the return oil circuit 25, until the left sealing mold and the right sealing mold are closed, and the pressure is maintained for a certain period of time to complete the molding of the bottle head.

[0046] The valve core of the three-position four-way servo valve 14 corresponding to the left main mold oil cylinder 15 and the right main mold oil cylinder 15 moves to the second position, at which time the P port is connected to the B1 port, and the T port is connected to the A1 port. The pressure oil enters the rod chamber 153 of the left main mold oil cylinder 15 and the right main mold oil cylinder 15 through the pressure oil circuit 24 and the second working oil circuit 12 in turn, so that the piston rod 151 of the oil cylinder 15 retracts, and at the same time, the rodless chamber 152 of the left main mold oil cylinder 15 and the right main mold oil cylinder 15 returns oil to the oil tank 21 through the first working oil circuit 11 and the return oil circuit 25, until the left main mold and the right main mold are opened, and the demoulding of the bottle body is completed.

[0047] The valve core of the three-position four-way servo valve 14 corresponding to the left sealing mold oil cylinder 15 and the right sealing mold oil cylinder 15 moves to the second position, at which time the P port is connected to the B1 port, and the T port is connected to the A1 port. The pressure oil enters the rod chamber 153 of the left sealing mold oil cylinder 15 and the right sealing mold oil cylinder 15 through the pressure oil circuit 24 and the second working oil circuit 12 in turn, so that the piston rod 151 of the oil cylinder 15 retracts, and at the same time, the rodless chamber 152 of the left sealing mold oil cylinder 15 and the right sealing mold oil cylinder 15 returns oil to the oil tank 21 through the first working oil circuit 11 and the return oil circuit 25, until the left sealing mold and the right sealing mold are opened, and the demolding of the bottle head is completed.

[0048] When the valve core of the three-position four-way servo valve 14 is in the first position and the second position, the two-position four-way electromagnetic hydraulically controlled one-way valve 13 remains energized, the valve core of the two-position four-way electromagnetic hydraulically controlled one-way valve 13 is in the first position, the A2 port is connected to the B2 port, and the A3 port is connected to the B3 port, thereby realizing the conduction of the first working oil circuit 11 and the second working oil circuit 12.

[0049] When the valve core of the three-position four-way servo valve 14 is in the middle position or the system is powered off, the two-position four-way electromagnetic hydraulically controlled one-way valve 13 is powered off, and the valve core of the two-position four-way electromagnetic hydraulically controlled one-way valve 13 is in the second position, the A2 port is disconnected from the B2 port, and the A3 port is disconnected from the B3 port, thereby realizing the disconnection of the first working oil circuit 11 and the second working oil circuit 12, ensuring that the pressure and position in the cylinder 15 remain unchanged to meet production requirements.

[0050] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. Single-mode continuous hydraulic system, characterized in that: Including oil supply components and working components; The working components have at least four groups, including: Oil cylinders, four oil cylinders are respectively connected to the left main mold, the right main mold, the left sealing mold and the right sealing mold; Three-position four-way servo valve; A first working oil circuit, a first end of which is connected to the A1 port of the three-position four-way servo valve, and a second end of which is connected to the rodless chamber of the oil cylinder; A second working oil circuit, a first end of which is connected to the B1 port of the three-position four-way servo valve, and a second end of which is connected to the rod chamber of the oil cylinder; Wherein, the oil supply assembly supplies oil to the P port of all the three-position four-way servo valves, and the oil supply assembly returns oil through the T port of all the three-position four-way servo valves; when the valve core of the three-position four-way servo valve is in the first position, the P port is connected with the A1 port, and the T port is connected with the B1 port; when the valve core of the three-position four-way servo valve is in the second position, the P port is connected with the B1 port, and the T port is connected with the A1 port.

2. The single-mode continuous hydraulic system according to claim 1, characterized in that: The working components include: Two-position four-way electromagnetic hydraulically controlled one-way valve, including: Port A2 and port A3 are arranged at the first end of the two-position four-way electromagnetic hydraulically controlled one-way valve; Port B2 and port B3 are arranged at the second end of the two-position four-way electromagnetic hydraulically controlled one-way valve; Among them, the A2 port and B2 port of the two-position four-way electromagnetic hydraulically controlled one-way valve are connected to the first working oil circuit, and the A3 port and B3 port of the two-position four-way electromagnetic hydraulically controlled one-way valve are connected to the second working oil circuit; when the two-position four-way electromagnetic hydraulically controlled one-way valve is powered on, the A2 port is connected to the B2 port, and the A3 port is connected to the B3 port; when the two-position four-way electromagnetic hydraulically controlled one-way valve is powered off, the A2 port is disconnected from the B2 port, and the A3 port is disconnected from the B3 port.

3. The single-mode continuous hydraulic system according to claim 1, characterized in that: The oil supply assembly comprises: tank; A pressure oil circuit, a first end of which is connected to the oil tank, and a second end of which is connected to the P port of the three-position four-way servo valve; an oil return circuit, a first end of which is connected to the oil tank, and a second end of which is connected to the T port of the three-position four-way servo valve; An oil pump is arranged on the pressure oil circuit.

4. The single-mode continuous hydraulic system according to claim 3, characterized in that: The oil supply assembly also includes: The accumulator has a first end connected to the pressure oil circuit and a second end connected to the return oil circuit.

5. The single-mode continuous hydraulic system according to claim 3, characterized in that: The pressure oil circuit also includes: A high-pressure filter is arranged on the pressure oil circuit and is located between the oil pump and the P port of the three-position four-way servo valve; An oil suction filter is arranged on the pressure oil circuit and is located in the oil tank; The oil return circuit comprises: The oil return filter is arranged on the oil return line.

6. The single-mode continuous hydraulic system according to claim 5, characterized in that: The pressure oil circuit also includes: A first quick connector, arranged on the pressure oil circuit and located between the high pressure filter and the oil pump; The oil return circuit also includes: The second quick connector is arranged on the oil return line and is located between the oil return filter and the T port of the three-position four-way servo valve.

7. The single-mode continuous hydraulic system according to claim 3, characterized in that: The oil return circuit also includes: The plug-in cooler is arranged on the oil return line.

8. The single-mode continuous hydraulic system according to claim 3, characterized in that: The oil supply assembly also includes: An electromagnetic reversing valve is arranged between the pressure oil circuit and the oil return circuit; Among them, when the electromagnetic reversing valve is powered on, the pressure oil circuit and the oil return circuit are not connected, and when the electromagnetic reversing valve is powered off, the pressure oil circuit and the oil return circuit are connected.

9. The single-mode continuous hydraulic system according to claim 3, characterized in that: The oil supply assembly also includes: The overflow valve is arranged between the pressure oil circuit and the oil return circuit.

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