Hydraulic control loop, recoiling machine mandrel outer supporting system and recoiling machine

Abstract

The hydraulic control loop comprises a hydraulic cylinder, an oil tank, a reversing valve and a flow control valve, the oil tank is connected with an oil supply path and an oil return path, the reversing valve comprises an oil inlet, an oil outlet and two working oil ports, the oil inlet is communicated with the oil supply path, the oil outlet is communicated with the oil return path, and the two working oil ports are communicated with the hydraulic cylinder. One working oil port is communicated with rod cavities of the two hydraulic cylinders, the other working oil port is communicated with rodless cavities of the two hydraulic cylinders, and a flow control valve is installed in an oil way, communicated to any working oil port, of at least one hydraulic cylinder, so that piston rods of the two hydraulic cylinders stretch out synchronously; the two hydraulic cylinders are used for being in driving connection with the two holding pieces in pair so that the two holding pieces can hold or loosen the coiling machine mandrel. The actions of the piston rods of the two hydraulic cylinders are kept consistent by adjusting the flow control valve, and the service life of the mandrel is prolonged by adjusting and controlling the action synchronism of the holding piece.

Description

Technical Field

[0001] The utility model relates to the technical field of coiler control, in particular to a hydraulic control circuit, an outer support system of a coiler mandrel and a coiler. Background Art

[0002] The outer support of the coiler mandrel is an important device in the coiling area. The outer support is divided into two parts: the inlet side of the coiler and the outlet side of the coiler. The outer supports on the inlet side and the outlet side are driven by two hydraulic cylinders respectively. In actual production, it is required that the outer supports on the inlet side and the outlet side move synchronously, so that the outer supports on the inlet side and the outlet side can hold the mandrel tightly at the same time, thereby reducing the damage of the outer support to the mandrel.

[0003] The above two hydraulic cylinders are configured with a hydraulic circuit. The traditional hydraulic circuit only controls the two hydraulic cylinders through an electromagnetic directional valve and a tee joint, and cannot ensure the synchronism of the two hydraulic cylinders. When the two hydraulic cylinders are not synchronized, the service life of the mandrel will be reduced. Summary of the Utility Model

[0004] To solve the above problems, the present application provides a hydraulic control circuit, an outer support system of a coiler mandrel and a coiler.

[0005] The present application provides a hydraulic control circuit, which includes a hydraulic cylinder, an oil tank, a directional valve and a flow control valve. There are two relatively arranged hydraulic cylinders. The oil tank is spaced from the hydraulic cylinders. The oil tank is connected with an oil supply circuit and an oil return circuit. The directional valve includes an oil inlet, an oil outlet and two working oil ports. The oil inlet is communicated with the oil supply circuit, the oil outlet is communicated with the oil return circuit, one working oil port is communicated with the rod chambers of the two hydraulic cylinders, and the other working oil port is communicated with the rodless chambers of the two hydraulic cylinders. At least one flow control valve is installed in the oil circuit connecting at least one hydraulic cylinder to any one of the working oil ports, so that the piston rods of the two hydraulic cylinders extend synchronously. The two hydraulic cylinders are respectively drivingly connected to a pair of two holding members, so that the two holding members hold or release the coiler mandrel.

[0006] In some embodiments, at least one flow control valve is installed in the oil circuit connecting the rod chambers of the two hydraulic cylinders to the working oil port.

[0007] In some embodiments, at least one flow control valve is installed in the oil circuit connecting the rodless chambers of the two hydraulic cylinders to the working oil port.

[0008] In some embodiments, the flow control valve is a throttle valve.

[0009] In some embodiments, the flow control valve is a one-way throttle valve. The hydraulic control circuit includes two first one-way throttle valves and two second one-way throttle valves;

[0010] In the oil circuit connecting a hydraulic cylinder to the working oil port, two first one-way throttle valves are installed in series, and the check valves of the two first one-way throttle valves face in opposite directions;

[0011] In the oil circuit connecting another hydraulic cylinder to the working oil port, two second one-way throttle valves are installed in series, and the check valves of the two second one-way throttle valves face in opposite directions.

[0012] In some embodiments, the two working oil ports are a first working oil port and a second working oil port;

[0013] The first working oil port is connected to a first main pipeline, and at the end of the first main pipeline away from the first working oil port, two first branch pipelines are connected at the same time. The two first branch pipelines are respectively connected to the rodless cavities of the two hydraulic cylinders;

[0014] The second working oil port is connected to a second main pipeline, and at the end of the second main pipeline away from the second working oil port, two second branch pipelines are connected at the same time. The two second branch pipelines are respectively connected to the rod cavities of the two hydraulic cylinders;

[0015] Wherein, at least one flow control valve is installed in the first branch oil circuit and / or the second branch oil circuit connected to one hydraulic cylinder, and the remaining flow control valves are installed in the first branch oil circuit and / or the second branch oil circuit connected to the other hydraulic cylinder.

[0016] In some embodiments, the hydraulic control circuit includes a two-way hydraulic lock. The reversing valve is connected to the rod cavity and the rodless cavity of the hydraulic cylinder through the two-way hydraulic lock. The two pilot-operated check valves of the two-way hydraulic lock are respectively installed on the first main pipeline and the second main pipeline.

[0017] In some embodiments, the reversing valve is an electromagnetic reversing valve.

[0018] A coiler mandrel outer support system includes a clamping member and the above-mentioned hydraulic control circuit. There are two relatively arranged clamping members. The two hydraulic cylinders of the hydraulic control circuit are respectively drivingly connected to the paired two clamping members so that the two clamping members clamp or release the coiler mandrel.

[0019] A coiler includes a coiler mandrel and the above-mentioned coiler mandrel outer support system. The paired two clamping members of the coiler mandrel outer support system are used to clamp or release the coiler mandrel.

[0020] The beneficial effects of the present application are as follows: A hydraulic control circuit is provided, which includes two hydraulic cylinders, a fuel tank, a reversing valve, and at least two flow control valves. The clamping members are driven by the hydraulic cylinders, and the two paired clamping members can clamp or release the coiler mandrel. The fuel tank is connected with an oil supply circuit and an oil return circuit. One working oil port of the reversing valve is connected to the rod chambers of the two hydraulic cylinders, and the other working oil port of the reversing valve is connected to the rodless chambers of the two hydraulic cylinders. The reversing valve is used for reversing to perform the telescopic movement of the piston rods of the hydraulic cylinders. Flow control valves are installed in the connecting oil circuits where at least one hydraulic cylinder is connected to any one of the working oil ports, and the flow control valves are used to adjust the oil inlet or oil outlet volume of the hydraulic cylinders. When the piston rods of the two hydraulic cylinders move inconsistently, the flow control valves are adjusted to make the piston rods of the two hydraulic cylinders move consistently. By controlling the synchronization of the actions of the two paired clamping members, the problem that the service life of the mandrel is damaged due to poor synchronization of the actions of the two clamping members is improved, and the service life of the mandrel is extended through the hydraulic control circuit of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0022] Figure 1 It is a schematic diagram of a hydraulic control circuit provided by the present application.

[0023] Reference numerals in the drawings: 1 - hydraulic cylinder, 21 - oil supply circuit, 22 - oil return circuit, 3 - reversing valve, 31 - oil inlet, 32 - oil outlet, 33 - working oil port, 331 - first working oil port, 3311 - first main pipeline, 3312 - first branch pipeline, 332 - second working oil port, 3321 - second main pipeline, 3322 - second branch pipeline, 4 - flow control valve, 41 - first one-way throttle valve, 42 - second one-way throttle valve, 5 - two-way hydraulic lock. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present application provides a hydraulic control circuit. Please refer to Figure 1 , which includes a hydraulic cylinder 1, a fuel tank, a reversing valve 3, and a flow control valve 4. In the present application, the flow control valve 4 refers to a valve that controls the fluid flow rate in a hydraulic system, abbreviated as a flow valve, and its main function is to adjust the operating speed of the actuator.

[0025] Such as Figure 1As shown, there are two relatively arranged hydraulic cylinders 1. The oil tank is spaced from the hydraulic cylinders 1. The oil tank is connected with an oil supply pipeline 21 and an oil return pipeline 22. Oil is supplied through the oil supply pipeline 21, and the oil fluid returns to the oil tank through the oil return pipeline 22. The reversing valve 3 includes an oil inlet 31, an oil outlet 32 and two working oil ports 33. The oil inlet 31 is communicated with the oil supply pipeline 21, the oil outlet 32 is communicated with the oil return pipeline 22. One working oil port 33 is communicated with the rod chambers of the two hydraulic cylinders 1, and the other working oil port 33 is communicated with the rodless chambers of the two hydraulic cylinders 1. As Figure 1 shown, when the reversing valve 3 is in the upper position, the rod chambers of the hydraulic cylinders 1 are filled with oil, and the piston rods of the hydraulic cylinders 1 retract; when the reversing valve 3 is in the lower position, the rodless chambers of the hydraulic cylinders 1 are filled with oil, and the piston rods of the hydraulic cylinders 1 extend.

[0026] In the hydraulic control circuit of the present application, "any one of the working oil ports 33" refers to one of the two working oil ports 33. A flow control valve 4 is installed in the oil pipeline connecting at least one hydraulic cylinder 1 to any one of the working oil ports 33, including the following various schemes: The flow control valve 4 is only installed in the oil pipeline connecting one hydraulic cylinder 1 to the working oil port 33, and the flow control valve 4 is installed in the oil pipeline connecting the rod chamber of this hydraulic cylinder 1 to the working oil port 33, or the flow control valve 4 is installed in the oil pipeline connecting the rodless chamber of this hydraulic cylinder 1 to the working oil port 33; Flow control valves 4 are installed in the oil pipelines connecting the two hydraulic cylinders 1 to the working oil port 33. The flow control valve 4 is installed in the oil pipeline connecting the rod chamber of the hydraulic cylinder 1 to the working oil port 33, or the flow control valve 4 is installed in the oil pipeline connecting the rodless chamber of this hydraulic cylinder 1 to the working oil port 33, or the flow control valve 4 is installed in the oil pipelines connecting the rod chamber and the rodless chamber of this hydraulic cylinder 1 to the working oil port 33.

[0027] The coiler mandrel is configured with a pair of two holding members, and the holding members can also be called outer support arms. The two hydraulic cylinders 1 are respectively drivingly connected with the pair of two holding members. When the piston rods of the hydraulic cylinders 1 extend, the two holding members can be closed to hold the coiler mandrel; when the piston rods of the hydraulic cylinders 1 retract, the two holding members can move away to release the coiler mandrel, releasing the holding state of the coiler mandrel.

[0028] By applying the hydraulic control circuit of the present application, the oil inflow or oil outflow of the hydraulic cylinder 1 can be adjusted through the flow control valve 4. When the piston rods of the two hydraulic cylinders 1 act inconsistently, by adjusting the flow control valve 4, the two hydraulic cylinders 1 are adjusted from the state where the piston rods act inconsistently to the state where the piston rods act consistently. Whether the piston rods act consistently is determined according to the movement speed of the piston rods. By adjusting the oil inflow and / or oil outflow of the hydraulic cylinder 1, the extension speed of the piston rods of the two hydraulic cylinders 1 is controlled, so that the piston rods of the two hydraulic cylinders 1 extend synchronously. By regulating the synchronization of the actions of the two pairs of clamping members, the two clamping members clamp or release the coiler mandrel, improving the problem that the service life of the mandrel is damaged when the synchronization of the actions of the two clamping members is poor. The service life of the mandrel is extended by the hydraulic control circuit of the present application.

[0029] The above explains that "at least one flow control valve 4 is installed in the oil circuit where at least one hydraulic cylinder 1 is connected to any one of the working oil ports 33". In some embodiments, at least one flow control valve 4 is installed in the oil circuit where the rod chambers of the two hydraulic cylinders 1 are connected to the working oil port 33. In some embodiments, at least one flow control valve 4 is installed in the oil circuit where the rodless chambers of the two hydraulic cylinders 1 are connected to the working oil port 33.

[0030] It should also be noted that the above limits that at least one flow control valve is installed in the oil circuit where at least one hydraulic cylinder is connected to any one of the working oil ports; if the oil circuit parts where the two hydraulic cylinders 1 are connected to the working oil port 33 are combined to form a main oil circuit and two branch oil circuits, one end of the main oil circuit is connected to the working oil port 33, the other end of the main oil circuit is connected to the two branch oil circuits, and the two branch oil circuits are respectively connected to the two hydraulic cylinders 1, then the flow control valve is installed in the branch oil circuit and not in the main oil circuit.

[0031] Since the space near the outside of the rodless chamber of the hydraulic cylinder 1 is relatively spacious and the space near the rod chamber of the hydraulic cylinder 1 is relatively cramped, in the hydraulic control circuit of the present application, a scheme of installing the flow control valve 4 in the oil circuit where the rodless chambers of the two hydraulic cylinders 1 are connected to the working oil port 33 is preferred.

[0032] In some embodiments, the flow control valve 4 is a throttle valve. The throttle valve realizes the regulation of flow and pressure by forming certain speed and pressure changes of the fluid in the constriction or throttle element. The flow control valve 4 includes but is not limited to a regulating valve, and the regulating valve refers to a valve that changes the opening degree of the valve to regulate the flow.

[0033] In some embodiments, the flow control valve 4 is a one-way throttle valve, which is composed of a parallel combination of a throttle valve and a one-way valve. Please refer to Figure 1, the hydraulic control circuit includes two first one-way throttle valves 41 and two second one-way throttle valves 42. In the oil circuit where one hydraulic cylinder 1 is connected to the working oil port 33, two first one-way throttle valves 41 are installed in series, and the check valves of the two first one-way throttle valves 41 face in opposite directions. In the oil circuit where the other hydraulic cylinder 1 is connected to the working oil port 33, two second one-way throttle valves 42 are installed in series, and the check valves of the two second one-way throttle valves 42 face in opposite directions.

[0034] Taking the Figure 1 scheme in which the rodless cavities of the two hydraulic cylinders 1 shown are connected to the working oil port 33 and a flow control valve 4 is installed in the oil circuit, the flow control valve 4 is a one-way throttle valve, and the hydraulic control circuit includes two first one-way throttle valves 41 and two second one-way throttle valves 42 as an example, the description is as follows: Before the oil enters the rodless cavity of the hydraulic cylinder 1, the oil flows through the check valve of one first one-way throttle valve 41 and the throttle valve of the other first one-way throttle valve 41, and then the oil enters the rodless cavity of the hydraulic cylinder 1, causing the piston rod to extend, and finally causing the clamping member to clamp the coiling mandrel. At this time, the extension speed of the piston rod of the hydraulic cylinder 1 is controlled by inlet throttling; when the oil enters the rodless cavity of the hydraulic cylinder 1, the oil is sent to the oil circuit through the rodless cavity, and the oil flows through the check valve of one first one-way throttle valve 41 and the throttle valve of the other first one-way throttle valve 41. During this process, the piston rod retracts, and at this time, the retraction speed of the piston rod of the hydraulic cylinder 1 is controlled by return throttling.

[0035] In the coiler, a mechanical limiting member is configured for the clamping member to play a role in space limitation. Generally speaking, it is necessary to control the retraction speed of the piston rod of the hydraulic cylinder 1. The retraction speed of the piston rod should not be too large to avoid the problem of component damage caused by the clamping member impacting the mechanical limiting member. Therefore, the above also performs return throttling to control the retraction speed of the piston rod of the hydraulic cylinder 1.

[0036] In some embodiments, please refer to Figure 1 , the two working oil ports 33 of the reversing valve 3 are the first working oil port 331 and the second working oil port 332. The first working oil port 331 is connected to a first main pipeline 3311. One end of the first main pipeline 3311 far from the first working oil port 331 is simultaneously connected to two first branch pipelines 3312, and the two first branch pipelines 3312 are respectively connected to the rodless cavities of the two hydraulic cylinders 1. The second working oil port 332 is connected to a second main pipeline 3321. One end of the second main pipeline 3321 far from the second working oil port 332 is simultaneously connected to two second branch pipelines 3322, and the two second branch pipelines 3322 are respectively connected to the rodless cavities of the two hydraulic cylinders 1.

[0037] By merging the oil circuits to form the above-mentioned main pipelines, the length of the oil pipes in the entire hydraulic control circuit is reduced. Correspondingly, as Figure 1As shown, at least one flow control valve 4 is installed in the first branch oil circuit and / or the second branch oil circuit communicating with one hydraulic cylinder 1, and the remaining flow control valves 4 are installed in the first branch oil circuit and / or the second branch oil circuit communicating with the other hydraulic cylinder 1.

[0038] In some embodiments, please refer to Figure 1 , the hydraulic control circuit includes a two-way hydraulic lock 5. The two-way hydraulic lock 5 is composed of two pilot-operated check valves. The two pilot-operated check valves of the two-way hydraulic lock 5 are respectively installed on the first main pipeline 3311 and the second main pipeline 3321. The reversing valve 3 communicates with the rod chamber and the rodless chamber of the hydraulic cylinder 1 through the two-way hydraulic lock 5, and plays a role of locking through the two-way hydraulic lock 5.

[0039] In some embodiments, the reversing valve 3 is an electromagnetic reversing valve 3, and the reversing valve 3 is reversed by electromagnetic control.

[0040] As mentioned above, when the piston rods of the two hydraulic cylinders 1 act inconsistently, it is necessary to adjust the flow control valve 4. The flow control valve 4 can be a manual valve, and on-site personnel can adjust the flow control valve 4 manually; the flow control valve 4 can also be an electric control valve, and the flow control valve 4 is adjusted by electric control.

[0041] Applying the hydraulic control circuit of the present application in the multi-mode fully continuous casting and rolling production line (abbreviation: MCCR production line) of Shougang Jingtang Iron and Steel Plant ensures the synchronization of the actions of the two clamping members, effectively extends the service life of the mandrel, and reduces the spare part cost.

[0042] The present application also provides an outer support system for a coiler mandrel, including clamping members and the above-mentioned hydraulic control circuit. There are two clamping members arranged oppositely. The two hydraulic cylinders 1 of the hydraulic control circuit are respectively drivingly connected to the paired two clamping members so that the two clamping members clamp or release the coiler mandrel. This system can regulate the synchronization of the actions of the two clamping members, improves the problem that the service life of the mandrel is damaged when the synchronization of the actions of the two clamping members is poor, and extends the service life of the mandrel.

[0043] The present application also provides a coiler, including a coiler mandrel and the above-mentioned outer support system for the coiler mandrel. The paired two clamping members of the outer support system for the coiler mandrel clamp or release the coiler mandrel, and by regulating the synchronization of the actions of the two clamping members, the service life of the mandrel is extended.

[0044] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0045] Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these modifications and variations.

Claims

1. A hydraulic control circuit, characterized in that, Comprising: Two hydraulic cylinders, which are oppositely arranged, and the two hydraulic cylinders are respectively drivingly connected to a pair of two clamping members to clamp or release the coiling mandrel by the two clamping members; An oil tank, spaced from the hydraulic cylinder, and the oil tank is connected with an oil supply circuit and an oil return circuit; A reversing valve, including an oil inlet, an oil outlet and two working oil ports, the oil inlet is communicated with the oil supply circuit, the oil outlet is communicated with the oil return circuit, one of the working oil ports is communicated with the rod chambers of the two hydraulic cylinders, and the other working oil port is communicated with the rodless chambers of the two hydraulic cylinders; A flow control valve, and the flow control valve is installed in the oil circuit connecting at least one hydraulic cylinder to any one of the working oil ports so that the piston rods of the two hydraulic cylinders extend synchronously.

2. The hydraulic control circuit according to claim 1, wherein At least one flow control valve is installed in the oil circuit connecting the rod chambers of the two hydraulic cylinders to the working oil port.

3. The hydraulic control circuit according to claim 1, wherein At least one flow control valve is installed in the oil circuit connecting the rodless chambers of the two hydraulic cylinders to the working oil port.

4. The hydraulic control circuit according to any one of claims 1-3, wherein The flow control valve is a throttle valve.

5. The hydraulic control circuit according to claim 2 or 3, wherein The flow control valve is a one-way throttle valve, and the hydraulic control circuit includes two first one-way throttle valves and two second one-way throttle valves; Two of the first one-way throttle valves are serially installed in the oil circuit connecting one hydraulic cylinder to the working oil port, and the one-way valves of the two first one-way throttle valves face in opposite directions; Two of the second one-way throttle valves are serially installed in the oil circuit connecting the other hydraulic cylinder to the working oil port, and the one-way valves of the two second one-way throttle valves face in opposite directions.

6. The hydraulic control circuit according to any one of claims 1-3, wherein The two working oil ports are a first working oil port and a second working oil port; The first working oil port is communicated with a first main pipeline, and one end of the first main pipeline far from the first working oil port is simultaneously communicated with two first branch pipelines, and the two first branch pipelines are respectively communicated with the rodless chambers of the two hydraulic cylinders; The second working oil port is communicated with a second main pipeline, and one end of the second main pipeline far from the second working oil port is simultaneously communicated with two second branch pipelines, and the two second branch pipelines are respectively communicated with the rod chambers of the two hydraulic cylinders; Wherein, at least one flow control valve is installed in the first branch pipeline and / or the second branch pipeline communicating with one hydraulic cylinder, and the remaining flow control valves are installed in the first branch pipeline and / or the second branch pipeline communicating with the other hydraulic cylinder.

7. The hydraulic control circuit according to claim 6, wherein The hydraulic control circuit includes a two-way hydraulic lock. The reversing valve is connected to the rod chamber and the rodless chamber of the hydraulic cylinder through the two-way hydraulic lock. The two pilot-operated check valves of the two-way hydraulic lock are respectively installed on the first main pipeline and the second main pipeline.

8. The hydraulic control circuit according to any one of claims 1-3, characterized in that the reversing valve is an electromagnetic reversing valve.

9. A coiling machine mandrel outer support system, characterized in that, It includes: Two holding members are oppositely arranged. For the hydraulic control circuit according to any one of claims 1-8, the two hydraulic cylinders of the hydraulic control circuit are respectively drivingly connected to the two pairs of holding members, so that the two holding members hold or release the coiling mandrel.

10. A coiler, characterized in that, It includes: A coiling mandrel; For the coiling mandrel external support system according to claim 9, the two pairs of holding members of the coiling mandrel external support system are used to hold or release the coiling mandrel.

Images