Hydraulic driving device, bell jar valve and smelting system

Abstract

The utility model discloses a hydraulic driving device, a bell jar valve and a smelting system.The hydraulic driving device comprises a hydraulic cylinder, a hydraulic control assembly and a safety valve, and the hydraulic control assembly is connected with the hydraulic cylinder through an oil conveying pipeline and used for controlling a piston rod of the hydraulic cylinder to stretch out and draw back; the safety valve is arranged on the oil conveying pipeline and is in a cut-off state when the pressure in the oil conveying pipeline is smaller than an opening threshold value. According to the hydraulic driving device, when the oil conveying pipeline between the safety valve and the hydraulic control assembly is damaged, hydraulic oil in the hydraulic cylinder can be prevented from flowing out through the damaged position of the oil conveying pipeline through the safety valve, so that the hydraulic oil is kept in the hydraulic cylinder; therefore, the position of the piston rod can be prevented from being changed due to pressure change in the hydraulic cylinder, the position of the driven part connected with the piston rod can be kept, and the reliability of the hydraulic driving device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic drive technical field especially is related to a kind of hydraulic drive device, bell jar valve and smelting system. BACKGROUND

[0002] Hydraulic drive device mainly includes drive pump, hydraulic cylinder, control valve, auxiliary device and working medium, working principle is through the change transmission energy of liquid pressure energy, and after control valve and pipeline, the pressure energy of working medium is converted into the mechanical energy of hydraulic cylinder, to drive the device connected with hydraulic cylinder to carry out linear motion or rotary motion.But in the use process of hydraulic drive device, when the pipeline connected with hydraulic cylinder is damaged, it will lead to working medium leakage in hydraulic cylinder, and the pressure change in hydraulic cylinder will lead to piston rod movement, and further lead to the device connected with hydraulic cylinder moves.Therefore, there is room for improvement. SUMMARY

[0003] The utility model discloses a kind of hydraulic drive devices, the hydraulic drive device can keep the position of piston rod unchanged after oil delivery pipeline breakage leakage.

[0004] According to the hydraulic drive device of the utility model first aspect embodiment, it include: hydraulic cylinder;Hydraulic control component, the hydraulic control component is connected with the hydraulic cylinder by oil delivery pipeline and is used to control the piston rod extension and contraction of the hydraulic cylinder;Safety valve, located in the oil delivery pipeline and in the pressure less than the opening threshold in the oil delivery pipeline When in cut-off state.

[0005] According to the hydraulic drive device of the utility model first aspect embodiment, when the oil delivery pipeline between safety valve and hydraulic control component is damaged, the hydraulic oil in hydraulic cylinder can be prevented from flowing out through the damaged position of oil delivery pipeline by safety valve, to keep the hydraulic oil in hydraulic cylinder, so that the position of piston rod can be avoided to change by the pressure change in hydraulic cylinder, and further the position of driven piece connected with piston rod can be kept, to improve the reliability of hydraulic drive device.

[0006] According to some embodiments of the utility model, the safety valve is adjacent to the hydraulic cylinder.

[0007] According to some embodiments of the utility model, the hydraulic cylinder includes cylinder body, piston in the cylinder body and piston rod connected with the piston, first oil cavity and second oil cavity located at the opposite sides of the piston are formed in the cylinder body, the oil delivery pipeline includes first oil path and second oil path, the hydraulic control component is communicated with the first oil cavity by the first oil path and is communicated with the second oil cavity by the second oil path, at least one of the first oil path and the second oil path is equipped with the safety valve.

[0008] According to some embodiments of the utility model, the hydraulic control assembly comprises an oil tank, an oil inlet pipeline, an oil return pipeline, a drive pump, an electromagnetic reversing valve, a balance valve and a one-way throttle valve, one end of the oil inlet pipeline and the oil return pipeline is connected with the oil tank, the other end of the oil inlet pipeline and the oil return pipeline is connected with the oil delivery pipeline in sequence through the electromagnetic reversing valve, the balance valve and the one-way throttle valve, the drive pump is arranged on the oil inlet pipeline to drive the hydraulic oil to flow towards the electromagnetic reversing valve.

[0009] According to some embodiments of the utility model, an overflow valve is connected between the oil inlet pipeline and the oil return pipeline, and the connection position of the overflow valve and the oil inlet pipeline is located on the downstream side of the drive pump.

[0010] According to some embodiments of the utility model, a pressure sensor for detecting the pressure in the oil inlet pipeline is arranged on the oil inlet pipeline, and / or a one-way valve located on the downstream side of the drive pump is arranged on the oil inlet pipeline, and the one-way valve is unidirectionally open in the direction away from the oil tank.

[0011] According to some embodiments of the utility model, a position sensor is further arranged in the hydraulic cylinder, the position sensor is electrically connected with the drive pump, and the position sensor is used for detecting the position of the piston of the hydraulic cylinder.

[0012] The utility model discloses a bell jar valve.

[0013] According to the bell jar valve of the second aspect of the utility model embodiment, the hydraulic drive device is used for driving the valve core to move between the first position and the second position.

[0014] According to the bell jar valve of the second aspect of the utility model embodiment, when the oil delivery pipeline between the safety valve and the hydraulic control assembly is damaged, the hydraulic oil in the hydraulic cylinder can be prevented from flowing out through the damaged position of the oil delivery pipeline through the safety valve, so that the hydraulic oil can be kept in the hydraulic cylinder, thereby the change of the pressure in the hydraulic cylinder can be avoided to change the position of the piston rod, and then the damage caused by the falling of the valve core due to the movement of the piston rod can be avoided, and the reliability of the hydraulic drive device is improved.

[0015] According to some embodiments of the utility model, the bell jar valve further comprises: a mounting bracket, the mounting bracket is formed with a downwardly open placing space, the hydraulic cylinder is arranged in the placing space, and the upper end of the valve body is fixed in the opening of the placing space which is downwardly open.

[0016] The utility model discloses a smelting system.

[0017] The smelting system according to the third aspect of the present application comprises the bell valve.

[0018] According to the smelting system of the third aspect of the present application, when the oil delivery pipeline between the safety valve and the hydraulic control assembly is damaged, the safety valve can prevent the hydraulic oil in the hydraulic cylinder from flowing out through the damaged position of the oil delivery pipeline, so as to keep the hydraulic oil in the hydraulic cylinder, thereby avoiding the change of the pressure in the hydraulic cylinder to change the position of the piston rod, and further avoiding the damage caused by the falling of the valve core due to the movement of the piston rod, and improving the reliability of the hydraulic driving device.

[0019] Additional aspects and advantages of the present application will be described in part in the following description, and will become more apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the bell valve according to the embodiment of the present application, wherein the valve core is in the first position;

[0021] Figure 2 is a schematic view of the bell valve according to the embodiment of the present application, wherein the valve core is in the second position.

[0022] REFERENCE NUMERALS:

[0023] 100, bell valve; 10, hydraulic driving device; 1, hydraulic cylinder; 11, cylinder body; 12, piston; 13, piston rod; 14, first oil cavity; 15, second oil cavity; 2, hydraulic control assembly; 21, oil tank; 22, oil inlet pipeline; 221, pressure sensor; 222, check valve; 23, oil return pipeline; 24, driving pump; 25, electromagnetic reversing valve; 26, balance valve; 27, check throttle valve; 28, overflow valve; 3, safety valve; 4, oil delivery pipeline; 41, first oil path; 42, second oil path; 20, valve body; 30, valve core; 40, mounting bracket; 401, placing space; 402, top plate; 403, first side plate; 404, second side plate. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0025] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. For simplicity of the disclosure, the description below refers to the devices and arrangements of particular examples. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application can repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and / or arrangements discussed. Moreover, the present application provides various examples of specific processes and materials, but one of ordinary skill in the art would understand that other processes can be applicable and / or other materials can be used.

[0026] The hydraulic drive device 10 according to the embodiments of the present application is described below with reference to the accompanying drawings.

[0027] As shown in Figure 1 and Figure 2 , the hydraulic drive device 10 according to the first aspect of the present application comprises a hydraulic cylinder 1, a hydraulic control assembly 2 and a safety valve 3, the hydraulic control assembly 2 is connected with the hydraulic cylinder 1 through an oil delivery pipeline 4 and is used to control the extension and retraction of the piston rod 13 of the hydraulic cylinder 1, that is, the hydraulic control assembly 2 is in communication with the hydraulic cylinder 1 through the oil delivery pipeline 4, the hydraulic control assembly 2 can deliver and recover hydraulic oil to the hydraulic cylinder 1 through the oil delivery pipeline 4 to control the pressure change in the hydraulic cylinder 1, and drive the extension and retraction of the piston rod 13 of the hydraulic cylinder 1.

[0028] The safety valve 3 is arranged in the oil delivery pipeline 4 and is in a cut-off state when the pressure in the oil delivery pipeline 4 is less than an opening threshold, that is, when the pressure in the oil delivery pipeline 4 is less than the opening threshold, the safety valve 3 can cut off the communication between the pipelines connected to the two sides of the safety valve 3. Therefore, when the oil delivery pipeline 4 between the safety valve 3 and the hydraulic control assembly 2 is damaged, the hydraulic oil in the hydraulic cylinder 1 can be prevented from flowing out through the damaged position of the oil delivery pipeline 4 by the safety valve 3, so as to keep the hydraulic oil in the hydraulic cylinder 1, thereby avoiding the change of the pressure in the hydraulic cylinder 1 to change the position of the piston rod 13, and further keeping the position of the driven member connected with the piston rod 13, so as to improve the reliability of the hydraulic drive device 10. It should be noted that the opening threshold here can be set according to the pressure adjustment capability of the hydraulic control assembly 2, as long as the opening threshold is greater than the pressure in the oil delivery pipeline 4 when the piston rod 13 is kept stationary and less than the pressure in the oil delivery pipeline 4 when the hydraulic control assembly 2 adjusts the position of the piston rod 13. Therefore, when the hydraulic control assembly 2 delivers hydraulic oil to the hydraulic cylinder 1 through the oil delivery pipeline 4, the pressure in the oil delivery pipeline 4 is greater than the opening threshold, and the safety valve 3 is in a conductive state, so that the hydraulic oil can flow between the hydraulic control assembly 2 and the hydraulic cylinder 1.

[0029] According to the hydraulic driving device 10 of the first aspect of the present application, when the oil delivery pipeline 4 between the safety valve 3 and the hydraulic control assembly 2 is damaged, the hydraulic oil in the hydraulic cylinder 1 can be prevented from flowing out through the damaged position of the oil delivery pipeline 4 by the safety valve 3, so as to keep the hydraulic oil in the hydraulic cylinder 1, thereby avoiding the change of the pressure in the hydraulic cylinder 1 to change the position of the piston rod 13, and further keeping the position of the driven member connected with the piston rod 13, so as to improve the reliability of the hydraulic driving device 10.

[0030] According to some embodiments of the present application, the safety valve 3 is arranged adjacent to the hydraulic cylinder 1. That is, compared with the distance between the safety valve 3 and the hydraulic control assembly 2, the distance between the safety valve 3 and the hydraulic cylinder 1 is closer, that is, the distance between the safety valve 3 and the hydraulic cylinder 1 is smaller than the distance between the safety valve 3 and the hydraulic control assembly 2. Wherein, the closer the safety valve 3 is to the hydraulic cylinder 1, the shorter the part of the oil delivery pipeline 4 between the safety valve 3 and the hydraulic cylinder 1, and the longer the part of the oil delivery pipeline 4 between the safety valve 3 and the hydraulic control assembly 2, and it can be understood that the safety valve 3 only fails when the part of the oil delivery pipeline 4 between the safety valve 3 and the hydraulic cylinder 1 is damaged and leaks, that is, the shorter the part of the oil delivery pipeline 4 between the safety valve 3 and the hydraulic cylinder 1, the lower the failure risk of the safety valve 3. Therefore, by arranging the safety valve 3 adjacent to the hydraulic cylinder 1, the part of the oil delivery pipeline 4 between the safety valve 3 and the hydraulic cylinder 1 can be reduced, thereby reducing the failure risk of the safety valve 3, so as to improve the reliability of the hydraulic driving device 10.

[0031] In one specific example, the safety valve 3 can be arranged at the connection position of the oil delivery pipeline 4 and the hydraulic cylinder 1, so as to further reduce the failure probability of the safety valve 3.

[0032] According to some embodiments of the present utility model, the hydraulic cylinder 1 includes a cylinder body 11, a piston 12 arranged in the cylinder body 11, and a piston rod 13 connected to the piston 12. A first oil chamber 14 and a second oil chamber 15 are formed in the cylinder body 11 and are located on opposite sides of the piston 12. The oil pipeline 4 includes a first oil circuit 41 and a second oil circuit 42. The hydraulic control component 2 is connected to the first oil chamber 14 through the first oil circuit 41 and is connected to the second oil chamber 15 through the second oil circuit 42. A safety valve 3 is provided on at least one of the first oil circuit 41 and the second oil circuit 42. That is to say, the hydraulic control component 2 can transport hydraulic oil to the first oil chamber 14 through the first oil circuit 41 to increase the hydraulic oil pressure in the first oil chamber 14, pushing the piston 12 to move in the direction close to the second oil chamber 15. The hydraulic oil in the second oil chamber 15 can return to the hydraulic control component 2 through the second oil circuit 42 under the squeezing of the piston 12, so that the piston rod 13 moves along the direction from the first oil chamber 14 to the second oil chamber 15. At the same time, the hydraulic control component 2 can also transport hydraulic oil to the second oil chamber 15 through the second oil circuit 42 to increase the hydraulic oil pressure in the second oil chamber 15, pushing the piston 12 to move in the direction close to the first oil chamber 14. The hydraulic oil in the first oil chamber 14 can return to the hydraulic control component 2 through the first oil circuit 41 under the squeezing of the piston 12, so that the piston rod 13 moves along the direction from the second oil chamber 15 to the first oil chamber 14.

[0033] Among them, the safety valve 3 can be set only on the first oil circuit 41. Therefore, when the part of the first oil circuit 41 located between the safety valve 3 and the hydraulic control component 2 is damaged and leaks, the safety valve 3 can prevent the hydraulic oil in the first oil chamber 14 from leaking through the damaged position of the first oil circuit 41, so that the hydraulic oil pressure in the first oil chamber 14 can be maintained to maintain the position of the piston rod 13; the safety valve 3 can also be set only on the second oil circuit 42. Therefore, when the part of the second oil circuit 42 located between the safety valve 3 and the hydraulic control component 2 is damaged and leaks, the safety valve 3 can prevent the hydraulic oil in the second oil chamber 15 from leaking through the damaged position of the second oil circuit 42, so that the hydraulic oil pressure in the second oil chamber 15 can be maintained to maintain the position of the piston rod 13.

[0034] It should be noted that the installation position of the safety valve 3 is set according to whether the hydraulic oil in the first oil chamber 14 and the second oil chamber 15 is under the pressure of the driven part when the hydraulic cylinder 1 is in a stationary state. For example, when the hydraulic cylinder 1 is in a stationary state, the driven part applies pressure to the hydraulic oil in the first oil chamber 14 through the piston rod 13 and the piston 12, then the safety valve 3 is at least set on the first oil circuit 41; similarly, when the hydraulic cylinder 1 is in a stationary state, the driven part applies pressure to the hydraulic oil in the second oil chamber 15 through the piston rod 13 and the piston 12, then the safety valve 3 is at least set on the second oil circuit 42.

[0035] In some embodiments, the first oil chamber 14 and the second oil chamber 15 are arranged along the up-down direction, and thus the hydraulic control assembly 2 can deliver hydraulic oil to the first oil chamber 14 through the first oil line 41 or deliver hydraulic oil to the second oil chamber 15 through the second oil line 42 to push the piston 12 to move along the up-down direction, thereby driving the piston rod 13 to move along the up-down direction.

[0036] In one specific example, the first oil chamber 14 is located above the second oil chamber 15, the piston rod 13 is connected to the lower end of the piston 12 and the lower end of the piston rod 13 extends out of the cylinder 11 to be connected to the driven member, and the safety valve 3 is arranged on the second oil line 42. The hydraulic control assembly 2 can deliver hydraulic oil to the first oil chamber 14 through the first oil line 41 to push the piston 12 to move downward, thereby driving the piston rod 13 to move downward. The hydraulic control assembly 2 can also deliver hydraulic oil to the second oil chamber 15 through the second oil line 42 to push the piston 12 to move upward, thereby driving the piston rod 13 to move upward. Meanwhile, when the part of the second oil line 42 between the safety valve 3 and the hydraulic control assembly 2 is damaged and leaks, the safety valve 3 can prevent the hydraulic oil in the second oil chamber 15 from leaking through the damaged position of the second oil line 42, thereby maintaining the hydraulic oil pressure in the second oil chamber 15 to maintain the position of the piston rod 13 and further maintain the position of the driven member.

[0037] According to some embodiments of the present application, the hydraulic control assembly 2 comprises an oil tank 21, an oil inlet pipeline 22, an oil return pipeline 23, a drive pump 24, an electromagnetic reversing valve 25, a balance valve 26 and a one-way throttle valve 27. One end of the oil inlet pipeline 22 and the oil return pipeline 23 is connected to the oil tank 21, and the other end of the oil inlet pipeline 22 and the oil return pipeline 23 is connected to the oil delivery pipeline 4 in sequence through the electromagnetic reversing valve 25, the balance valve 26 and the one-way throttle valve 27. The drive pump 24 is arranged in the oil inlet pipeline 22 to drive the hydraulic oil to flow towards the electromagnetic reversing valve 25.

[0038] That is, the drive pump 24 can drive the hydraulic oil in the oil tank 21 to enter the oil delivery pipeline 4 in sequence through the oil inlet pipeline 22, the electromagnetic reversing valve 25, the balance valve 26 and the one-way throttle valve 27, and then enter the hydraulic cylinder 1 through the oil delivery pipeline 4. The hydraulic oil in the hydraulic cylinder 1 can enter the oil return pipeline 23 in sequence through the oil delivery pipeline 4, the one-way throttle valve 27, the balance valve 26 and the electromagnetic reversing valve 25, and then return to the oil tank 21 through the oil return pipeline 23.

[0039] The electromagnetic reversing valve 25 can switch the flow direction of the hydraulic oil in the oil delivery pipeline 4, thereby controlling the extension and retraction of the piston rod 13. The balance valve 26 can automatically adjust the opening degree to stabilize the pressure in the oil inlet pipeline 22 and the oil delivery pipeline 4 when the pressure in the oil inlet pipeline 22 and the oil delivery pipeline 4 is too high or too low. Meanwhile, when the driving pump 24 stops working, the balance valve 26 can block the oil return pipeline 23, so that the position of the piston rod 13 can remain unchanged, thereby improving the stability of the hydraulic control assembly 2 and realizing the hovering of the piston rod 13. The one-way throttling valve 27 includes a throttling valve and a one-way valve connected in parallel. The one-way valve is unidirectionally communicated from the hydraulic cylinder 1 to the oil tank 21. The throttling valve can control the flow of the oil inlet pipeline 22 and the oil return pipeline 23, thereby throttling and depressurizing the hydraulic oil flowing from the oil inlet pipeline 22 and the oil return pipeline 23 to the hydraulic cylinder 1, reducing the extension and retraction speed of the piston rod 13, and improving the stability of the hydraulic control assembly 2.

[0040] In a specific example, the cylinder body 11 is formed with a first oil chamber 14 and a second oil chamber 15 located on opposite sides of the piston 12, respectively. The oil delivery pipeline 4 includes a first oil pipeline 41 and a second oil pipeline 42. The oil inlet pipeline 22 is communicated with the first oil chamber 14 in sequence through the driving pump 24, the electromagnetic reversing valve 25, the balance valve 26, the one-way throttling valve 27, and the first oil pipeline 41. The oil return pipeline 23 is communicated with the second oil chamber 15 in sequence through the electromagnetic reversing valve 25, the balance valve 26, the one-way throttling valve 27, and the second oil pipeline 42. The electromagnetic reversing valve 25 can switch the connection between the oil inlet pipeline 22 and the first oil pipeline 41, and the connection between the oil return pipeline 23 and the second oil pipeline 42, or switch the connection between the oil inlet pipeline 22 and the second oil pipeline 42, and the connection between the oil return pipeline 23 and the first oil pipeline 41. When the electromagnetic reversing valve 25 switches the connection between the oil inlet pipeline 22 and the first oil pipeline 41, and the connection between the oil return pipeline 23 and the second oil pipeline 42, the driving pump 24 can drive the hydraulic oil in the oil tank 21 to enter the first oil chamber 14 in sequence through the oil inlet pipeline 22, the electromagnetic reversing valve 25, the balance valve 26, the one-way throttling valve 27, and the first oil pipeline 41, so that the hydraulic oil pressure in the first oil chamber 14 increases to push the piston 12 to move towards the second oil chamber 15. The hydraulic oil in the second oil chamber 15 can return to the oil tank 21 in sequence through the second oil pipeline 42, the one-way throttling valve 27, the balance valve 26, the electromagnetic reversing valve 25, and the oil return pipeline 23 under the extrusion of the piston 12. When the electromagnetic reversing valve 25 switches the connection between the oil inlet pipeline 22 and the second oil pipeline 42, and the connection between the oil return pipeline 23 and the first oil pipeline 41, the driving pump 24 can drive the hydraulic oil in the oil tank 21 to enter the second oil chamber 15 in sequence through the oil inlet pipeline 22, the electromagnetic reversing valve 25, the balance valve 26, the one-way throttling valve 27, and the second oil pipeline 42, so that the hydraulic oil pressure in the second oil chamber 15 increases to push the piston 12 to move towards the first oil chamber 14. The hydraulic oil in the first oil chamber 14 can return to the oil tank 21 in sequence through the first oil pipeline 41, the one-way throttling valve 27, the balance valve 26, the electromagnetic reversing valve 25, and the oil return pipeline 23 under the extrusion of the piston 12.

[0041] According to some embodiments of the present application, the overflow valve 28 is connected between the oil inlet pipeline 22 and the oil return pipeline 23, and the connection position of the overflow valve 28 and the oil inlet pipeline 22 is located on the downstream side of the drive pump 24. It should be noted that the downstream side here is relative to the flow direction of the hydraulic oil, that is, the hydraulic oil in the oil tank 21 can enter the overflow valve 28 from the drive pump 24. Therefore, when the pressure in the oil inlet pipeline 22 and the oil return pipeline 23 exceeds the rated pressure of the overflow valve 28, the overflow valve 28 can communicate the oil inlet pipeline 22 and the oil return pipeline 23, so that the drive pump 24 can directly drive the hydraulic oil in the oil tank 21 to return to the oil tank 21 from the oil inlet pipeline 22 through the overflow valve 28, avoiding damage caused by excessive pressure in the oil inlet pipeline 22 and the oil return pipeline 23, and improving the safety of the hydraulic drive device 10.

[0042] According to some embodiments of the present application, the pressure sensor 221 for detecting the pressure in the oil inlet pipeline 22 is arranged on the oil inlet pipeline 22. Therefore, the pressure in the oil inlet pipeline 22 can be checked by reading the reading of the pressure sensor 221, so that whether the pressure in the oil inlet pipeline 22 is in a normal working state can be observed intuitively, which is convenient for the staff to check, and the pressure in the oil inlet pipeline 22 can be adjusted in time when the pressure in the oil inlet pipeline 22 is too large, so that the hydraulic drive device 10 is in a normal working state.

[0043] According to some embodiments of the present application, the one-way valve 222 located on the downstream side of the drive pump 24 is arranged on the oil inlet pipeline 22, and the one-way valve 222 is unidirectional in the direction away from the oil tank 21. Therefore, the one-way valve 222 can prevent the hydraulic oil in the oil inlet pipeline 22 from returning to the oil tank 21 through the one-way valve 222, preventing the hydraulic oil in the oil inlet pipeline 22 from flowing back into the oil pump and causing damage to the oil pump, and improving the safety of the oil pump.

[0044] According to some embodiments of the present application, the position sensor is further arranged in the hydraulic cylinder 1, the position sensor is electrically connected with the drive pump 24, and the position sensor is used for detecting the position of the piston 12 of the hydraulic cylinder 1. Therefore, the stroke of the piston 12 can be limited by the position sensor, and when the piston 12 moves beyond the stroke range, the position sensor can transmit an electrical signal to the drive pump 24 to close the drive pump 24, thereby preventing the piston rod 13 from moving out of the stroke range, and improving the reliability of the hydraulic drive device 10.

[0045] In some embodiments, the driving pump 24, the pressure sensor 221 and the position sensor are electrically connected with the control box, so that the position sensor can transmit an electric signal to the control box, and the control box controls the opening and closing of the driving pump 24, and at the same time, the pressure sensor 221 can transmit a reading to the control box, so that the pressure of the oil inlet pipeline 22 can be directly checked by checking the opening degree number on the control box during the inspection, and the inspection is safer and simpler.

[0046] The bell valve 100 according to the second aspect of the present application will be described below with reference to the drawings.

[0047] The bell valve 100 according to the second aspect of the present application comprises a valve body 20, a valve core 30 and a hydraulic driving device 10, the valve core 30 is movable between a first position for cutting off the bell valve 100 and a second position for conducting the bell valve 100, and the hydraulic driving device 10 is used to drive the valve core 30 to move between the first position and the second position. That is, the piston rod 13 of the hydraulic driving device 10 is connected with the valve core 30, and the hydraulic driving device 10 can drive the valve core 30 to move between the first position and the second position by driving the piston rod 13, so as to realize the cutting off and conducting of the bell valve 100. The switching of the position of the valve core 30 by the hydraulic driving device 10 instead of manpower can reduce the labor cost, and the thrust of the hydraulic driving device 10 is large, which can avoid that the valve core 30 of the bell valve 100 is stuck with accumulated materials and cannot be switched in position by manpower, thereby improving the reliability of the bell valve 100. At the same time, the safety valve 3 is arranged in the oil conveying pipeline 4, when the oil conveying pipeline 4 between the safety valve 3 and the hydraulic control assembly 2 is damaged, the hydraulic oil in the hydraulic cylinder 1 can be prevented from flowing out through the damaged position of the oil conveying pipeline 4 by the safety valve 3, so as to keep the hydraulic oil in the hydraulic cylinder 1, thereby avoiding that the position of the piston rod 13 is changed by the pressure change in the hydraulic cylinder 1, and further avoiding that the valve core 30 falls and is damaged due to the movement of the piston rod 13, thereby improving the reliability of the hydraulic driving device 10.

[0048] According to the bell valve 100 according to the second aspect of the present application, when the oil conveying pipeline 4 between the safety valve 3 and the hydraulic control assembly 2 is damaged, the hydraulic oil in the hydraulic cylinder 1 can be prevented from flowing out through the damaged position of the oil conveying pipeline 4 by the safety valve 3, so as to keep the hydraulic oil in the hydraulic cylinder 1, thereby avoiding that the position of the piston rod 13 is changed by the pressure change in the hydraulic cylinder 1, and further avoiding that the valve core 30 falls and is damaged due to the movement of the piston rod 13, thereby improving the reliability of the hydraulic driving device 10.

[0049] According to some embodiments of the utility model, bell jar valve 100 still include installation support 40, installation support 40 form with the downward open placement space 401, hydraulic cylinder 1 is located in the placement space 401, the upper end of valve body 20 is fixed in the downward open opening of placement space 401. Thus, through installation support 40 can provide installation position for hydraulic cylinder 1 and valve body 20, facilitate the connection of hydraulic cylinder 1 and valve body 20, and can provide sufficient mounting space for hydraulic cylinder 1 and valve body 20.

[0050] In one specific example, installation support 40 includes top plate 402, first side plate 403 and second side plate 404, hydraulic cylinder 1 includes cylinder body 11, piston 12 located in cylinder body 11 and piston rod 13 connected with piston 12, first oil cavity 14 and second oil cavity 15 are formed in cylinder body 11 and located on the upper and lower sides of piston 12 respectively, the upper end of hydraulic cylinder 1 is fixedly connected with the side of top plate 402 facing hydraulic cylinder 1, and the lower end of piston rod 13 is fixedly connected with the upper end of bell jar valve 100.

[0051] The smelting system according to the third aspect of the utility model will be described below with reference to the accompanying drawings.

[0052] The smelting system according to the third aspect of the utility model comprises: bell jar valve 100.

[0053] According to the smelting system of the third aspect of the utility model, when the oil conveying pipeline 4 between the safety valve 3 and the hydraulic control assembly 2 is damaged, the hydraulic oil in the hydraulic cylinder 1 can be prevented from flowing out through the damaged position of the oil conveying pipeline 4 by the safety valve 3, so as to keep the hydraulic oil in the hydraulic cylinder 1, thereby the position of the piston rod 13 can be prevented from changing due to the change of the pressure in the hydraulic cylinder 1, and further the piston rod 13 can be prevented from moving to cause the valve core 30 to fall and be damaged, and the reliability of the hydraulic driving device 10 is improved.

[0054] In one specific example, the smelting system is used for copper smelting, and after the flue gas generated by the copper converter in the copper smelting plant enters the flue gas acid making and cyclic collection system, the opening and closing of the bell jar valve 100 can be controlled to realize the switching of the flue gas passage in the flue gas acid making and cyclic collection system, so as to control the flow direction of the flue gas in the flue gas acid making and cyclic collection system.

[0055] In the utility model, unless another definite provision and limitation, the terms such as “installation”, “connection”, “connection”, “fixation” should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0056] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without mutual contradiction.

[0057] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A hydraulic drive device, characterized in that: include: Hydraulic cylinder; A hydraulic control assembly, connected to the hydraulic cylinder via an oil pipeline and used to control the extension and retraction of the piston rod of the hydraulic cylinder; A safety valve is provided in the oil pipeline and is in a closed state when the pressure in the oil pipeline is less than an opening threshold. The safety valve is provided adjacent to the hydraulic cylinder. The hydraulic cylinder includes a cylinder body, a piston provided in the cylinder body, and a piston rod connected to the piston. A first oil chamber and a second oil chamber are formed in the cylinder body and are located on opposite sides of the piston respectively. The oil pipeline includes a first oil circuit and a second oil circuit. The hydraulic control component is connected to the first oil chamber through the first oil circuit and is connected to the second oil chamber through the second oil circuit. The safety valve is provided on at least one of the first oil circuit and the second oil circuit.

2. The hydraulic drive device according to claim 1, characterized in that: The hydraulic control assembly includes an oil tank, an oil inlet line, an oil return line, a drive pump, an electromagnetic reversing valve, a balancing valve and a one-way throttle valve. One end of the oil inlet line and the oil return line is connected to the oil tank, and the other end of the oil inlet line and the oil return line is connected to the oil delivery line through the electromagnetic reversing valve, the balancing valve and the one-way throttle valve in sequence. The drive pump is arranged in the oil inlet line to drive the hydraulic oil to flow toward the electromagnetic reversing valve.

3. The hydraulic drive device according to claim 2, characterized in that: A relief valve is connected between the oil inlet pipeline and the oil return pipeline, and a connection position between the relief valve and the oil inlet pipeline is located on the downstream side of the driving pump.

4. The hydraulic drive device according to claim 2, characterized in that: The oil inlet pipeline is provided with a pressure sensor for detecting the pressure in the oil inlet pipeline; and / or, the oil inlet pipeline is provided with a one-way valve located on the downstream side of the drive pump, and the one-way valve is unidirectional in a direction away from the oil tank.

5. The hydraulic drive device according to claim 2, characterized in that: A position sensor is further provided in the hydraulic cylinder. The position sensor is electrically connected to the driving pump and is used to detect the position of the piston of the hydraulic cylinder.

6. A bell valve, characterized in that: include: Valve body; a valve core movable between a first position for shutting off the bell valve and a second position for conducting the bell valve; The hydraulic drive device according to any one of claims 1 to 5, wherein the hydraulic drive device is used to drive the valve core to move between the first position and the second position.

7. The bell valve according to claim 6, characterized in that Also includes: The mounting bracket is formed with a downwardly open placement space, the hydraulic cylinder is arranged in the placement space, and the upper end of the valve body is fixed in the downwardly open opening of the placement space.

8. A smelting system, characterized in that: include: The bell valve according to claim 6 or 7.

Images