Integrated hydraulic system and tire vulcanizing machine

Abstract

The present invention relates to the field of tire molding, and discloses an integrated hydraulic system and a tire vulcanizer. The integrated hydraulic system includes a hydraulic pump source, a control valve block and an actuator, the actuator includes an integrated oil cylinder and a liquid filling unit, the integrated oil cylinder includes a cylinder body, a static piston rod and a dynamic piston rod, the static piston rod is fixedly arranged in the cylinder body, the dynamic piston rod is slidably arranged in the cylinder body and slidably cooperates with the static piston rod, a rodless cavity and a rod cavity are arranged between the dynamic piston rod and the cylinder body, a fast-forward cavity is arranged between the dynamic piston rod and the static piston rod, the liquid filling unit is used to supply hydraulic oil to the rodless cavity, and the hydraulic pump source supplies hydraulic oil to the rod cavity, the rodless cavity and the fast-forward cavity respectively through the control valve block. The present invention has a compact structure, reduces occupied space, is easy to install, improves work efficiency, has few pipeline connection points, has a low probability of hydraulic oil leakage, does not need to rely on the additional output flow of the oil pump to achieve rapid mold closing, reduces cost and energy consumption, and reduces noise.

Description

Technical Field

[0001] The invention relates to the field of tire molding, and in particular to an integrated hydraulic system and a tire vulcanizer. Background Art

[0002] Hydraulic vulcanizer is the equipment used in the vulcanization process during tire production, and is one of the key equipment that determines tire quality. In the existing hydraulic vulcanizer, the opening and closing of molds, adding mold force, lifting and lowering of the center mechanism, extension and retraction of the active mold, and lifting and lowering of the tire loading mechanism are all realized by hydraulic transmission, which has fast response speed, reliable action, high efficiency, can realize stepless speed regulation, good performance, greatly reducing the user's operating costs and improving equipment utilization.

[0003] The existing hydraulic vulcanizer has the following disadvantages: the mold opening and closing cylinder and the pressurizing cylinder are two independent cylinders, resulting in high cost of use, large space occupation, cumbersome installation, more pipe connection points, and increased leakage points of hydraulic oil; the mold opening and closing cylinders rely entirely on the pump output flow to achieve rapid mold closing. The pump has a large displacement and a large motor power, which increases energy consumption and cost. Summary of the invention

[0004] Based on the above problems, the purpose of the present invention is to provide an integrated hydraulic system with a compact structure, fewer pipeline connection points, low probability of hydraulic oil leakage, reduced costs and energy consumption, and reduced noise.

[0005] The present invention also aims to provide a tire vulcanizer equipped with the above-mentioned integrated hydraulic system, which can complete the pressurization and pressure holding steps after the tire vulcanizer is quickly molded, and complete the pressure relief step before the tire vulcanizer is quickly opened after vulcanization is completed, thereby effectively ensuring the vulcanization quality of the tire.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An integrated hydraulic system includes a hydraulic pump source, a control valve block and an actuator, the actuator includes an integrated oil cylinder and a filling unit, the integrated oil cylinder includes a cylinder body, a static piston rod and a dynamic piston rod, the static piston rod is fixedly arranged in the cylinder body, the dynamic piston rod is slidably arranged in the cylinder body and slidably cooperates with the static piston rod, a rodless chamber and a rod chamber are arranged between the dynamic piston rod and the cylinder body, a fast-forward chamber is arranged between the dynamic piston rod and the static piston rod, the filling unit is used to supply hydraulic oil to the rodless chamber, and the hydraulic pump source supplies hydraulic oil to the rod chamber, the rodless chamber and the fast-forward chamber respectively through the control valve block.

[0008] As a preferred solution of the integrated hydraulic system of the present invention, the hydraulic pump source includes an oil tank and a low-pressure oil pump, the control valve block includes a third electromagnetic ball valve, a second reversing valve, a first one-way throttle valve, a second balancing valve and a first balancing valve, and the hydraulic oil in the oil tank flows into the fast-forward chamber via the low-pressure oil pump, the third electromagnetic ball valve, the second reversing valve, the first one-way throttle valve, the second balancing valve and the first balancing valve in sequence to push the moving piston rod to the extended position.

[0009] As a preferred solution of the integrated hydraulic system of the present invention, the filling unit includes a filling valve and a high-level oil tank. When the moving piston rod is extended, the negative pressure of the rodless chamber opens the filling valve, and the hydraulic oil in the high-level oil tank flows into the rodless chamber through the filling valve to push the moving piston rod.

[0010] As a preferred embodiment of the integrated hydraulic system of the present invention, the control valve block also includes a second one-way throttle valve. When the moving piston rod is extended, the hydraulic oil in the rod chamber flows into the oil tank via the second balancing valve, the second one-way throttle valve and the second reversing valve in sequence.

[0011] As a preferred solution of the integrated hydraulic system of the present invention, the control valve block further includes a second electromagnetic ball valve, and the hydraulic oil in the oil tank flows into the rodless chamber via the low-pressure oil pump and the second electromagnetic ball valve in sequence.

[0012] As a preferred solution of the integrated hydraulic system of the present invention, the hydraulic pump source also includes a high-pressure oil pump, and the control valve block also includes a first reversing valve and a first solenoid ball valve. The hydraulic oil in the oil tank flows into the rodless chamber via the high-pressure oil pump, the first reversing valve and the first solenoid ball valve in sequence to pressurize the moving piston rod.

[0013] As a preferred solution of the integrated hydraulic system of the present invention, the control valve block further includes a fourth electromagnetic ball valve, and the hydraulic oil in the rodless chamber flows into the oil tank via the fourth electromagnetic ball valve to relieve the pressure on the moving piston rod.

[0014] As a preferred solution of the integrated hydraulic system of the present invention, the hydraulic oil in the oil tank flows into the rod chamber in sequence through the low-pressure oil pump, the third electromagnetic ball valve, the second reversing valve, the second one-way throttle valve and the second balancing valve to push the moving piston rod to the retracted position.

[0015] As a preferred solution of the integrated hydraulic system of the present invention, the hydraulic oil in the oil tank flows into the filling valve via the low-pressure oil pump, the third solenoid ball valve, the second reversing valve and the second one-way throttle valve in sequence to open the filling valve, and the hydraulic oil in the rodless chamber flows into the high-level oil tank via the filling valve.

[0016] A tire vulcanizer comprises the integrated hydraulic system as described above.

[0017] The beneficial effects of the present invention are:

[0018] The integrated hydraulic system provided by the present invention has a hydraulic pump source supplying hydraulic oil to the fast-forward cavity between the moving piston rod and the static piston rod of the integrated oil cylinder through a control valve block, and the hydraulic oil drives the moving piston rod to move rapidly relative to the static piston rod. At the same time, the hydraulic oil is quickly supplied to the rodless cavity between the moving piston rod and the cylinder body through a liquid filling unit to accelerate the movement of the moving piston rod and realize the rapid mold closing function. The hydraulic pump source supplies high-pressure hydraulic oil to the rodless cavity through the control valve block to realize the pressurization function, and the hydraulic pump source supplies hydraulic oil to the rod cavity through the control valve block to realize the pressure relief function. The integrated hydraulic system provided by the present invention has a compact structure, reduces the occupied space, is easy to install, improves the working efficiency, has few pipeline connection points, has a low probability of hydraulic oil leakage, does not need to rely on the additional output flow of the oil pump to realize rapid mold closing, reduces the cost and energy consumption, and reduces the noise.

[0019] The tire vulcanizer provided by the present invention includes the above-mentioned integrated hydraulic system, which can complete the pressurization and pressure holding steps after the tire vulcanizer quickly closes the mold, and complete the pressure relief step before the tire vulcanizer quickly opens the mold after vulcanization is completed, thereby effectively ensuring the tire vulcanization quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the principle of an integrated hydraulic system provided by a specific embodiment of the present invention;

[0022] Figure 2 It is a structural schematic diagram of an integrated oil cylinder (when the moving piston rod is retracted) in an integrated hydraulic system provided by a specific embodiment of the present invention;

[0023] Figure 3 It is a structural schematic diagram of an integrated oil cylinder (when the moving piston rod is extended) in an integrated hydraulic system provided by a specific embodiment of the present invention;

[0024] Figure 4 is a structural schematic diagram of a tire vulcanizer including an integrated hydraulic system provided by a specific embodiment of the present invention;

[0025] Figure 5It is a structural schematic diagram of a tire vulcanizer including an integrated hydraulic system provided by a specific embodiment of the present invention (when the moving piston rod is in a retracted position);

[0026] Figure 6 It is a structural schematic diagram of a tire vulcanizer including an integrated hydraulic system (when the moving piston rod is in an extended position) provided in a specific embodiment of the present invention.

[0027] In the figure:

[0028] 101- oil tank; 102- low-pressure oil pump; 103- high-pressure oil pump; 104- level gauge; 105- first oil suction filter; 106- second oil suction filter; 107- oil return filter; 108- temperature controller; 109- level transmitter; 110- air filter; 111- magnet; 112- first motor; 113- first coupling; 114- second motor; 115- second coupling;

[0029] 201-third electromagnetic ball valve; 202-second reversing valve; 203-first one-way throttle valve; 204-second balancing valve; 205-first balancing valve; 206-second one-way throttle valve; 207-second electromagnetic ball valve; 208-first reversing valve; 209-first electromagnetic ball valve; 210-fourth electromagnetic ball valve; 211-first electromagnetic overflow valve; 212-second electromagnetic overflow valve; 213-safety valve; 214-first pressure gauge; 215-second pressure gauge; 216-first one-way valve; 217-second one-way valve; 218-first throttle valve; 219-second throttle valve; 220-pressure

[0030] sensor;

[0031] 31-integrated oil cylinder; 32-filling unit;

[0032] 311-cylinder body; 312-static piston rod; 313-moving piston rod; 314-rodless chamber; 315-rod chamber; 316-fast forward chamber;

[0033] 321-filling valve; 322-high level oil tank;

[0034] 400-upper mold; 500-lower mold; 600-frame. DETAILED DESCRIPTION

[0035] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figures 1 to 3 As shown, this embodiment provides an integrated hydraulic system, which includes a hydraulic pump source, a control valve block and an actuator. The actuator includes an integrated oil cylinder 31 and a filling unit 32, and the integrated oil cylinder 31 includes a cylinder body 311, a static piston rod 312 and a dynamic piston rod 313. The static piston rod 312 is fixedly arranged in the cylinder body 311, and the dynamic piston rod 313 is slidably arranged in the cylinder body 311 and slidably cooperates with the static piston rod 312. A rodless chamber 314 and a rod chamber 315 are arranged between the dynamic piston rod 313 and the cylinder body 311, and a fast-forward chamber 316 is arranged between the dynamic piston rod 313 and the static piston rod 312. The filling unit 32 is used to supply hydraulic oil to the rodless chamber 314, and the hydraulic pump source supplies hydraulic oil to the rod chamber 315, the rodless chamber 314 and the fast-forward chamber 316 respectively through the control valve block.

[0039] The hydraulic pump source supplies hydraulic oil to the fast-forward chamber 316 between the moving piston rod 313 and the static piston rod 312 of the integrated oil cylinder 31 through the control valve block, and the hydraulic oil pushes the moving piston rod 313 to move rapidly relative to the static piston rod 312. At the same time, the hydraulic oil is quickly supplied to the rodless chamber 314 between the moving piston rod 313 and the cylinder body 311 through the filling unit 32, so as to accelerate the movement of the moving piston rod 313 and realize the rapid mold clamping function. The hydraulic pump source supplies high-pressure hydraulic oil to the rodless chamber 314 through the control valve block to realize the pressurization function. The hydraulic pump source supplies hydraulic oil to the rod chamber 315 through the control valve block to realize the pressure relief function.

[0040] Optionally, the hydraulic pump source includes an oil tank 101 and a low-pressure oil pump 102, and the control valve block includes a third electromagnetic ball valve 201, a second reversing valve 202, a first one-way throttle valve 203, a second balancing valve 204, and a first balancing valve 205. The hydraulic oil in the oil tank 101 flows into the fast-forward chamber 316 in sequence through the low-pressure oil pump 102, the third electromagnetic ball valve 201, the second reversing valve 202, the first one-way throttle valve 203, the second balancing valve 204, and the first balancing valve 205 to push the piston rod 313 to the extended position. In this embodiment, the hydraulic pump source also includes a first motor 112 and a first coupling 113, and the first motor 112 is connected to the low-pressure oil pump 102 through the first coupling 113. The control valve block also includes a second electromagnetic overflow valve 212 and a second one-way valve 217 sequentially arranged downstream of the low-pressure oil pump 102.

[0041] During rapid mold closing, the first motor 112 is started, the electromagnet 111 of the second electromagnetic overflow valve 212 is given an electrical signal, the AL port of the low-pressure oil pump 102 outputs low-pressure oil, and the low-pressure oil is input from the BL port of the second check valve 217 and output from the CL port of the second check valve 217. At the same time, the a-end electromagnet 111 of the third electromagnetic ball valve 201 and the b-end electromagnet 111 of the second reversing valve 202 are simultaneously given electrical signals, and the low-pressure oil enters the DL port of the third electromagnetic ball valve 201 from the CL port of the second check valve 217, and then enters the FL port of the second reversing valve 202 from the HL port of the third electromagnetic ball valve 201, and then enters the QL port of the first one-way throttle valve 203 from the FB port of the second reversing valve 202, and then outputs from the HL port of the first one-way throttle valve 203, and opens the second balancing valve 204 through the KZ port of the second balancing valve 204. The low-pressure oil is input from the first balancing valve 205, and then output from the KL port of the first balancing valve 205, and enters the fast-forward chamber 316 through the YK port of the static piston rod 312. The dynamic piston rod 313 is pushed down quickly by the low-pressure oil to achieve rapid mold closing.

[0042] Optionally, the filling unit 32 includes a filling valve 321 and a high-position oil tank 322. When the moving piston rod 313 extends, the negative pressure of the rodless chamber 314 opens the filling valve 321, and the hydraulic oil in the high-position oil tank 322 flows into the rodless chamber 314 through the filling valve 321 to push the moving piston rod 313. During the descent of the moving piston rod 313, the rodless chamber 314 generates negative pressure, and the filling valve 321 is opened under the action of the negative pressure, and the oil in the high-position oil tank 322 is sucked into the rodless chamber 314, so as to achieve rapid filling, and rapid mold closing is achieved without relying on the additional output flow of the oil pump, thereby reducing costs and energy consumption, and reducing noise.

[0043] Optionally, the control valve block further includes a second one-way throttle valve 206. When the movable piston rod 313 is extended, the hydraulic oil in the rod chamber 315 flows into the oil tank 101 in sequence through the second balance valve 204, the second one-way throttle valve 206 and the second reversing valve 202. In this embodiment, the hydraulic pump source further includes an oil return filter 107, which is disposed between the second reversing valve 202 and the oil tank 101.

[0044] During the mold closing process, the oil in the rod chamber 315 is output through the YH port, input through the JL port of the second balancing valve 204, output from the IL port of the second balancing valve 204, then input from the HL port of the second one-way throttle valve 206, output through the GL port of the second one-way throttle valve 206, then input from the FA port of the second reversing valve 202, output from the FT port of the second reversing valve 202, input through the T2 port of the return oil filter 107, and then output through the T1 port of the return oil filter 107 into the oil tank 101. The first balancing valve 205 and the second balancing valve 204 can keep the moving piston rod 313 at a stable speed without impact during operation.

[0045] Optionally, the control valve block further includes a second electromagnetic ball valve 207, and the hydraulic oil in the oil tank 101 flows into the rodless chamber 314 via the low-pressure oil pump 102 and the second electromagnetic ball valve 207 in sequence. In this embodiment, the control valve block further includes a first throttle valve 218 and a pressure sensor 220, the first throttle valve 218 is arranged in parallel with the third electromagnetic ball valve 201, and the pressure sensor 220 is used to monitor the oil pressure of the rodless chamber 314 in real time.

[0046] When the moving piston rod 313 is close to the end of the stroke, the mold closing changes from fast to slow, and the filling valve 321 is closed under the action of the return spring. The electromagnet 111 at the a-end of the third electromagnetic ball valve 201 is powered off and loses the electrical signal. The low-pressure oil passes through the first throttle valve 218 to limit its flow rate. At the same time, the a-end of the second electromagnetic ball valve 207 inputs an electrical signal, and the low-pressure oil is output from the CL port of the second check valve 217, input through the EP port of the second electromagnetic ball valve 207, and then output from the EO port of the second electromagnetic ball valve 207, and enters the rodless cavity 314 through the YG port. The moving piston rod 313 slowly reaches the end of the stroke, completing the mold closing.

[0047] At this time, the oil continues to enter the rodless chamber 314 through the YG port, and the moving piston rod 313 begins to pre-pressurize. Under the monitoring of the pressure sensor 220, after the rodless chamber 314 reaches the set pressure, the low-pressure oil pump 102 is closed, the second reversing valve 202 and the second solenoid ball valve 207 lose electrical signals, and the valve core returns to its original position.

[0048] Optionally, the hydraulic pump source further includes a high-pressure oil pump 103, and the control valve block further includes a first reversing valve 208 and a first electromagnetic ball valve 209. The hydraulic oil in the oil tank 101 flows into the rodless chamber 314 via the high-pressure oil pump 103, the first reversing valve 208 and the first electromagnetic ball valve 209 in sequence to pressurize the moving piston rod 313. In this embodiment, the hydraulic pump source further includes a second motor 114 and a second coupling 115, and the second motor 114 is connected to the high-pressure oil pump 103 via the second coupling 115. The control valve block also includes a first electromagnetic overflow valve 211, a first one-way valve 216 and a safety valve 213. The first electromagnetic overflow valve 211 is arranged between the high-pressure oil pump 103 and the first reversing valve 208, the first one-way valve 216 is arranged downstream of the first reversing valve 208, one end of the safety valve 213 is arranged between the second electromagnetic ball valve 207 and the rodless chamber 314, and the other end of the safety valve 213 is connected to the oil tank 101. The safety valve 213 provides a safety protection function for the system.

[0049] At this time, the second motor 114 is started, the electromagnet 111 of the first electromagnetic overflow valve 211 gives an electrical signal, the AH port of the high-pressure oil pump 103 outputs high-pressure oil, and at the same time, the a end of the first reversing valve 208 inputs an electrical signal, the high-pressure oil is input from the PR port of the first reversing valve 208, and then output from the BR port of the first reversing valve 208, the high-pressure oil is input from the BH port of the first check valve 216, and output from the CH port of the first check valve 216. At the same time, the a end of the first electromagnetic ball valve 209 inputs an electrical signal, the high-pressure oil is input from the DH port of the first electromagnetic ball valve 209, and output from the EH port of the first electromagnetic ball valve 209, and enters the rodless chamber 314 through the YG port for pressurization. When the pressure sensor 220 detects that the pressure of the rodless chamber 314 reaches the set value, the a end of the first electromagnetic ball valve 209 loses the electrical signal, the valve core is closed, and the pressure on the movable piston rod 313 is maintained to maintain the pressure. At the same time, the second motor 114 stops moving, and the end a of the first reversing valve 208 loses the electrical signal and returns to its original position.

[0050] Optionally, the control valve block further includes a fourth electromagnetic ball valve 210, and the hydraulic oil in the rodless chamber 314 flows into the oil tank 101 through the fourth electromagnetic ball valve 210 to relieve the pressure on the moving piston rod 313. After the tire is vulcanized, it is necessary to relieve the pressure before opening the mold. The a-end of the fourth electromagnetic ball valve 210 inputs an electrical signal, and the high-pressure oil in the rodless chamber 314 enters the EJ port of the fourth electromagnetic ball valve 210 through the YG port, and then outputs back to the oil tank 101 through the EI port of the fourth electromagnetic ball valve 210. When the pressure sensor 220 detects that the pressure in the rodless chamber 314 is zero, the fourth electromagnetic ball valve 210 loses the electrical signal and the pressure relief is completed.

[0051] Optionally, the hydraulic oil in the oil tank 101 flows into the rod chamber 315 in sequence through the low-pressure oil pump 102, the third electromagnetic ball valve 201, the second reversing valve 202, the second one-way throttle valve 206 and the second balance valve 204 to push the piston rod 313 to the retracted position. When the mold is opened, the first motor 112 is started, the electromagnet 111 of the second electromagnetic overflow valve 212 gives an electrical signal, the AL port of the low-pressure oil pump 102 outputs low-pressure oil, the low-pressure oil is input from the BL port of the second one-way valve 217, and output from the CL port of the second one-way valve 217. At the same time, the a-end electromagnet 111 of the third electromagnetic ball valve 201 and the a-end electromagnet 111 of the second reversing valve 202 are simultaneously given electrical signals, and the low-pressure oil enters the DL port of the third electromagnetic ball valve 201 from the CL port of the second one-way valve 217, and then enters the FL port of the second reversing valve 202 from the HL port of the third electromagnetic ball valve 201, and then enters the GL port of the second one-way throttle valve 206 from the FA port of the second reversing valve 202. At the same time, the low-pressure oil passes through the KX port of the filling valve 321 to push open the filling valve 321, and the low-pressure oil enters the IL port of the second balancing valve 204 from the HL port of the second one-way throttle valve 206. At the same time, the low-pressure oil opens the first balancing valve 205 through the FY port of the first balancing valve 205. The low-pressure oil is output from the JL port of the second balancing valve 204 and enters the rod chamber 315 from the YH port. Under the push of the low-pressure oil, the moving piston rod 313 retracts to achieve rapid mold opening.

[0052] Optionally, the hydraulic oil in the oil tank 101 flows into the filling valve 321 via the low-pressure oil pump 102, the third electromagnetic ball valve 201, the second reversing valve 202 and the second one-way throttle valve 206 in sequence to open the filling valve 321, and the hydraulic oil in the rodless chamber 314 flows into the high-level oil tank 322 via the filling valve 321. The oil in the rodless chamber 314 is output through the YL port, input from the ZL port of the filling valve 321, and then output from the XL port of the filling valve 321 to enter the high-level oil tank 322, and a cycle is completed. When there is too much oil in the high-level oil tank 322, the oil will flow back to the oil tank 101 from the YL port of the high-level oil tank 322 to prevent the high-level oil tank 322 from overflowing with hydraulic oil and affecting the quality of the tire.

[0053] In this embodiment, the control valve block also includes a first pressure gauge 214, a second pressure gauge 215 and a second throttle valve 219. The first pressure gauge 214 is used to detect the downstream pipeline pressure of the high-pressure oil pump 103, the second pressure gauge 215 is used to detect the downstream pipeline pressure of the low-pressure oil pump 102, and the second throttle valve 219 is arranged upstream of the fourth electromagnetic ball valve 210.

[0054] The hydraulic pump source also includes a liquid level meter 104, which is used to detect the oil level in the oil tank 101. The oil tank 101 is equipped with an air filter 110, which is used to filter impurities in the air when the oil in the oil tank 101 decreases and air enters the oil tank 101, so as to avoid aggravating the wear of the integrated oil cylinder 31 and ensure the service life of the integrated oil cylinder 31. The oil tank 101 is also equipped with a liquid level transmitter 109. During the operation of the equipment, the loss of hydraulic oil will cause the reduction of oil. When the liquid level transmitter 109 detects the decrease in liquid level, it can timely alarm and shut down, thereby avoiding damage to the low-pressure oil pump 102 and the high-pressure oil pump 103 due to inhalation of air.

[0055] Since the temperature in the vulcanization workshop is relatively high, a temperature controller 108 is installed in the oil tank 101, which can detect the shutdown alarm in time when the oil temperature rises, thereby protecting the hydraulic components from accelerated aging and damage due to high temperature. The first oil suction filter 105, the second oil suction filter 106 and the return oil filter 107 on the oil tank 101 can protect the low-pressure oil pump 102 and the high-pressure oil pump 103, and prevent them from inhaling impurities in the oil and causing damage to the parts. The oil tank 101 is also equipped with a magnet 111, which can absorb iron filings and iron powder brought back from the system return oil to prevent them from being inhaled into the oil pump.

[0056] The integrated hydraulic system provided in this embodiment has a working process including seven steps: rapid mold closing, fast mold closing to slow mold closing, pre-pressurization, pressurization, pressure maintenance, pressure relief and mold opening.

[0057] like Figure 1 As shown, during rapid mold closing, the first motor 112 is started, the electromagnet 111 of the second electromagnetic overflow valve 212 is given an electrical signal, the AL port of the low-pressure oil pump 102 outputs low-pressure oil, and the low-pressure oil is input from the BL port of the second check valve 217 and output from the CL port of the second check valve 217. At the same time, the a-end electromagnet 111 of the third electromagnetic ball valve 201 and the b-end electromagnet 111 of the second reversing valve 202 are simultaneously given electrical signals, and the low-pressure oil enters the DL port of the third electromagnetic ball valve 201 from the CL port of the second check valve 217, and then enters the FL port of the second reversing valve 202 from the HL port of the third electromagnetic ball valve 201, and then enters the QL port of the first one-way throttle valve 203 from the FB port of the second reversing valve 202, and then outputs from the HL port of the first one-way throttle valve 203, and opens the second balancing valve 204 through the KZ port of the second balancing valve 204. The low-pressure oil is input from the first balancing valve 205, and then output from the KL port of the first balancing valve 205, and enters the fast-forward chamber 316 through the YK port of the static piston rod 312. The dynamic piston rod 313 is pushed down quickly by the low-pressure oil to achieve fast mold closing. Figure 2 and Figure 3 shown.

[0058] During the descending process of the moving piston rod 313, negative pressure is generated in the rodless chamber 314, and the filling valve 321 is opened under the action of the negative pressure. The oil in the high-level oil tank 322 is sucked into the rodless chamber 314, so that rapid filling is achieved. There is no need to rely on the additional output flow of the oil pump to achieve rapid mold closing, which reduces costs and energy consumption and reduces noise.

[0059] During the mold closing process, the oil in the rod chamber 315 is output through the YH port, input through the JL port of the second balancing valve 204, output from the IL port of the second balancing valve 204, then input from the HL port of the second one-way throttle valve 206, output through the GL port of the second one-way throttle valve 206, then input from the FA port of the second reversing valve 202, output from the FT port of the second reversing valve 202, input through the T2 port of the return oil filter 107, and then output through the T1 port of the return oil filter 107 into the oil tank 101. The first balancing valve 205 and the second balancing valve 204 can keep the moving piston rod 313 at a stable speed without impact during operation.

[0060] When the moving piston rod 313 is close to the end of the stroke, the mold closing changes from fast to slow, and the filling valve 321 is closed under the action of the return spring. The electromagnet 111 at the a end of the third electromagnetic ball valve 201 is powered off and loses the electrical signal. The low-pressure oil passes through the first throttle valve 218 to limit its flow rate. At the same time, the a end of the second electromagnetic ball valve 207 inputs an electrical signal, and the low-pressure oil is output from the CL port of the second check valve 217, input through the EP port of the second electromagnetic ball valve 207, and then output from the EO port of the second electromagnetic ball valve 207, and enters the rodless cavity 314 through the YG port. The moving piston rod 313 slowly reaches the end of the stroke, completing the mold closing. Figure 6 shown.

[0061] At this time, the oil continues to enter the rodless chamber 314 through the YG port, and the moving piston rod 313 begins to pre-pressurize. Under the monitoring of the pressure sensor 220, after the rodless chamber 314 reaches the set pressure, the low-pressure oil pump 102 is closed, the second reversing valve 202 and the second solenoid ball valve 207 lose electrical signals, and the valve core returns to its original position.

[0062] At this time, the second motor 114 is started, the electromagnet 111 of the first electromagnetic overflow valve 211 gives an electrical signal, the AH port of the high-pressure oil pump 103 outputs high-pressure oil, and at the same time, the a end of the first reversing valve 208 inputs an electrical signal, the high-pressure oil is input from the PR port of the first reversing valve 208, and then output from the BR port of the first reversing valve 208, the high-pressure oil is input from the BH port of the first check valve 216, and output from the CH port of the first check valve 216. At the same time, the a end of the first electromagnetic ball valve 209 inputs an electrical signal, the high-pressure oil is input from the DH port of the first electromagnetic ball valve 209, and output from the EH port of the first electromagnetic ball valve 209, and enters the rodless chamber 314 through the YG port for pressurization. When the pressure sensor 220 detects that the pressure of the rodless chamber 314 reaches the set value, the a end of the first electromagnetic ball valve 209 loses the electrical signal, the valve core is closed, and the pressure on the movable piston rod 313 is maintained to maintain the pressure. At the same time, the second motor 114 stops moving, and the end a of the first reversing valve 208 loses the electrical signal and returns to its original position.

[0063] After the tire is vulcanized, it is necessary to release the pressure before opening the mold. The a-end of the fourth electromagnetic ball valve 210 inputs an electrical signal, and the high-pressure oil in the rodless chamber 314 enters the EJ port of the fourth electromagnetic ball valve 210 through the YG port, and then outputs back to the oil tank 101 through the EI port of the fourth electromagnetic ball valve 210. When the pressure sensor 220 detects that the pressure in the rodless chamber 314 is zero, the fourth electromagnetic ball valve 210 loses the electrical signal and the pressure is released.

[0064] When the mold is opened, the first motor 112 is started, the electromagnet 111 of the second electromagnetic overflow valve 212 gives an electrical signal, the AL port of the low-pressure oil pump 102 outputs low-pressure oil, the low-pressure oil is input from the BL port of the second one-way valve 217, and output from the CL port of the second one-way valve 217. At the same time, the a-end electromagnet 111 of the third electromagnetic ball valve 201 and the a-end electromagnet 111 of the second reversing valve 202 are simultaneously given electrical signals, and the low-pressure oil enters the DL port of the third electromagnetic ball valve 201 from the CL port of the second one-way valve 217, and then enters the FL port of the second reversing valve 202 from the HL port of the third electromagnetic ball valve 201, and then enters the GL port of the second one-way throttle valve 206 from the FA port of the second reversing valve 202. At the same time, the low-pressure oil passes through the KX port of the filling valve 321 to push open the filling valve 321, and the low-pressure oil enters the IL port of the second balancing valve 204 from the HL port of the second one-way throttle valve 206. At the same time, the low-pressure oil opens the first balancing valve 205 through the FY port of the first balancing valve 205. The low-pressure oil is output from the JL port of the second balancing valve 204 and enters the rod chamber 315 from the YH port. Under the push of the low-pressure oil, the moving piston rod 313 retracts to the initial position, as shown in FIG. Figure 5 As shown, rapid mold opening is achieved.

[0065] The oil in the rodless chamber 314 is output through the YL port, input from the ZL port of the filling valve 321, and then output from the XL port of the filling valve 321 to the high-level oil tank 322, and a cycle is completed. When there is too much oil in the high-level oil tank 322, the oil will flow back to the oil tank 101 from the YL port of the high-level oil tank 322 to prevent the high-level oil tank 322 from overflowing with hydraulic oil and affecting the quality of the tire.

[0066] The integrated hydraulic system provided in this embodiment has a compact structure, reduces occupied space, is easy to install, improves work efficiency, has fewer pipeline connection points, and has a low chance of hydraulic oil leakage. It does not require additional output flow from the oil pump to achieve rapid mold closing, thereby reducing costs and energy consumption and reducing noise.

[0067] like Figures 4 to 6 As shown, this embodiment also provides a tire vulcanizer, including the above-mentioned integrated hydraulic system, which can complete the pressurization and pressure-maintaining steps after the tire vulcanizer is quickly molded, and complete the pressure relief step before the tire vulcanizer is quickly opened after vulcanization is completed, thereby effectively ensuring the quality of tire vulcanization. The tire vulcanizer also includes a frame 600, an upper mold 400 and a lower mold 500, the upper mold 400 is slidably arranged on the frame 600, and the upper mold 400 is molded and opened with the lower mold 500 by the drive of the above-mentioned integrated hydraulic system.

[0068] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An integrated hydraulic system, characterized in that: The invention comprises a hydraulic pump source, a control valve block and an actuator, wherein the actuator comprises an integrated oil cylinder (31) and a liquid filling unit (32), wherein the integrated oil cylinder (31) comprises a cylinder body (311), a static piston rod (312) and a dynamic piston rod (313), wherein the static piston rod (312) is fixedly arranged in the cylinder body (311), and the dynamic piston rod (313) is slidably arranged in the cylinder body (311) and slidably cooperates with the static piston rod (312), and the dynamic piston rod (313) is fixedly arranged in the cylinder body (311), and the dynamic piston rod (313) is slidably arranged in the cylinder body (311) and slidably cooperates with the static piston rod (312). A rodless chamber (314) and a rod chamber (315) are provided between the movable piston rod (313) and the cylinder body (311); a fast-forward chamber (316) is provided between the movable piston rod (313) and the static piston rod (312); the filling unit (32) is used to supply hydraulic oil to the rodless chamber (314); and the hydraulic pump source supplies hydraulic oil to the rod chamber (315), the rodless chamber (314) and the fast-forward chamber (316) respectively through the control valve block; The hydraulic pump source comprises an oil tank (101) and a low-pressure oil pump (102); the control valve block comprises a third electromagnetic ball valve (201), a second reversing valve (202), a first one-way throttle valve (203), a second balancing valve (204) and a first balancing valve (205); the hydraulic oil in the oil tank (101) flows into the fast-forward chamber (316) in sequence via the low-pressure oil pump (102), the third electromagnetic ball valve (201), the second reversing valve (202), the first one-way throttle valve (203), the second balancing valve (204) and the first balancing valve (205), so as to push the movable piston rod (313) to the extended position; The filling unit (32) comprises a filling valve (321) and a high-position oil tank (322); when the movable piston rod (313) is extended, the negative pressure of the rodless chamber (314) opens the filling valve (321), and the hydraulic oil in the high-position oil tank (322) flows into the rodless chamber (314) through the filling valve (321) to push the movable piston rod (313); the control valve block further comprises a second one-way throttle valve (206); (313) is extended, the hydraulic oil in the rod chamber (315) flows into the oil tank (101) in sequence via the second balancing valve (204), the second one-way throttle valve (206) and the second reversing valve (202); the control valve block also includes a second electromagnetic ball valve (207), and the hydraulic oil in the oil tank (101) flows into the rodless chamber (314) in sequence via the low-pressure oil pump (102) and the second electromagnetic ball valve (207); The hydraulic pump source further includes a high-pressure oil pump (103), and the control valve block further includes a first reversing valve (208) and a first electromagnetic ball valve (209). The hydraulic oil in the oil tank (101) flows into the rodless chamber (314) in sequence via the high-pressure oil pump (103), the first reversing valve (208) and the first electromagnetic ball valve (209) to pressurize the moving piston rod (313).

2. The integrated hydraulic system according to claim 1, characterized in that: The control valve block further comprises a fourth electromagnetic ball valve (210), and the hydraulic oil in the rodless chamber (314) flows into the oil tank (101) via the fourth electromagnetic ball valve (210) to relieve the pressure of the movable piston rod (313).

3. The integrated hydraulic system according to claim 1, characterized in that: The hydraulic oil in the oil tank (101) flows into the rod chamber (315) in sequence via the low-pressure oil pump (102), the third electromagnetic ball valve (201), the second reversing valve (202), the second one-way throttle valve (206) and the second balancing valve (204) to push the movable piston rod (313) to a retracted position.

4. The integrated hydraulic system according to claim 3, characterized in that: The hydraulic oil in the oil tank (101) flows into the filling valve (321) in sequence via the low-pressure oil pump (102), the third electromagnetic ball valve (201), the second reversing valve (202) and the second one-way throttle valve (206) to open the filling valve (321), and the hydraulic oil in the rodless chamber (314) flows into the high-level oil tank (322) via the filling valve (321).

5. A tire vulcanizing machine, characterized in that: Comprising an integrated hydraulic system as described in any one of claims 1-4.

Images