Overpressure cylinder explosion prevention protection early warning device for large oil cylinder

Abstract

The utility model discloses a protection early warning device for preventing overpressure cylinder explosion of a large-scale oil cylinder, which relates to the technical field of oil cylinder protection and comprises an oil tank, an oil inlet pipe connected with the oil tank, an oil pump fixedly arranged on the oil tank and connected with the oil inlet pipe, a large-scale jacking machine oil cylinder connected with the oil pump, and a hydraulic valve group arranged between the large-scale jacking machine oil cylinder and the oil pump. The hydraulic valve group can control connection and disconnection of an oil cylinder and an oil pump of the large jacking machine, and the first protection early warning assembly is arranged between the oil pump and the hydraulic valve group and electrically connected with the hydraulic valve group. According to the overpressure cylinder explosion prevention protection early warning device for the large oil cylinder, the working pressure of the oil cylinder and the pressure in the cylinder locking state can be monitored in real time, early warning is given out in time when the overpressure condition occurs, and even forced shutdown is carried out, so that the oil cylinder is protected against damage, the safety and stability of a kiln are improved, and the production loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil cylinder protection technical field, concretely is a large -scale oil cylinder prevents overpressure cylinder explosion protection early warning device. BACKGROUND

[0002] In the lithium extraction technology of tunnel type firing kiln, the kiln head top machine oil cylinder is an important device for baking the kiln car to the predetermined position. However, since the kiln is more than 270 meters long, and the kiln car is baked at a high temperature of more than 1000 degrees, the expansion coefficient of the kiln car can reach 150-200 mm, causing a huge counterthrust on the positioning top machine oil cylinder when the kiln car expands backward. When this counterthrust exceeds the maximum working pressure of the oil cylinder, it is easy to cause cylinder explosion or internal leakage failure, causing damage to the oil cylinder and affecting the normal operation of the production line.

[0003] In addition, in the firing kiln, unexpected situations such as derailment of the kiln car, damage to the kiln car wheel, falling bricks, or collapse in the kiln may occur. When these problems occur, the high-temperature environment and the closed nature of the kiln interior make it impossible to observe from the outside in a timely manner. At this time, if the top machine oil cylinder still follows the set program to push a new kiln car into the kiln after reaching the set period, it will face two risks: one is the overpressure cylinder explosion or internal leakage of the oil cylinder due to increased resistance; the other is that the further expansion of the failure range caused by the continued pushing of the kiln car, until the kiln car with falling bricks, collapse, or damaged kiln car wheel is pushed out of the kiln after 6-8 hours, the kiln inspector can discover it, but at this time the failure has spread to a large extent, and it usually needs to be repaired after stopping the kiln for repair. Not only is the time long (at least a week), but also natural cooling is required, causing great loss to production.

[0004] Therefore, it is particularly important to develop a protection and early warning device that can monitor the working state of the oil cylinder in real time, warn potential failures, and protect the oil cylinder from damage. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a large -scale oil cylinder prevents overpressure cylinder explosion protection early warning device, this kind of large -scale oil cylinder prevents overpressure cylinder explosion protection early warning device, can real -time monitoring the working pressure of oil cylinder and the pressure when locking cylinder state, and timely send early warning when overpressure occurs, even forced shutdown, to protect the oil cylinder from damage, improve the security and stability of kiln, reduce production loss.

[0006] The above-mentioned optimized structure of the utility model is realized by the following technical scheme: a large -scale oil cylinder prevents overpressure cylinder explosion protection early warning device, including the oil tank,

[0007] The oil inlet pipe is connected with the oil tank;

[0008] The oil pump is fixedly arranged on the oil tank and connected with the oil inlet pipe;

[0009] A large ejector cylinder connected with the oil pump;

[0010] A hydraulic valve group arranged between the large ejector cylinder and the oil pump, which can control the communication and disconnection of the large ejector cylinder and the oil pump;

[0011] A first protection and early warning assembly arranged between the oil pump and the hydraulic valve group and electrically connected with the hydraulic valve group.

[0012] In some embodiments, a cylinder retracting oil pipe is further arranged between the hydraulic valve group and the oil return port of the large ejector cylinder;

[0013] A cylinder ejecting oil pipe arranged between the hydraulic valve group and the oil inlet port of the large ejector cylinder.

[0014] In some embodiments, a second protection and early warning assembly is further included, which comprises a cylinder locking and cylinder electric contact pressure transmitter arranged between the cylinder ejecting oil pipe and the hydraulic valve group and electrically connected with the hydraulic valve group;

[0015] A second alarm arranged on the oil tank and electrically connected with the cylinder locking and cylinder electric contact pressure transmitter.

[0016] In some embodiments, the cylinder locking and cylinder electric contact pressure transmitter is a remote electric contact pressure transmitter.

[0017] In some embodiments, a return oil filter station is further included, which is arranged between the cylinder retracting oil pipe and the hydraulic valve group.

[0018] In some embodiments, the first protection and early warning assembly comprises a cylinder ejecting and cylinder electric contact pressure transmitter arranged between the oil pump and the hydraulic valve group and electrically connected with the hydraulic valve group;

[0019] A first alarm arranged on the oil tank and electrically connected with the cylinder ejecting and cylinder electric contact pressure transmitter.

[0020] In some embodiments, the cylinder ejecting and cylinder electric contact pressure transmitter is a remote electric contact hydraulic pressure transmitter.

[0021] In some embodiments, a front limit stroke switch is further included, which is arranged on one side of the large ejector cylinder in the ejecting direction;

[0022] A rear limit travel switch is arranged between the front limit travel switch and the large-scale top machine oil cylinder.

[0023] In summary, the utility model has the following beneficial effects:

[0024] The first protection warning component and the second protection warning component can monitor the working pressure of the large-scale top machine oil cylinder and the pressure of the large-scale top machine oil cylinder in the locked state in real time, and can send an alarm when the pressure is abnormal, so as to remind the kiln inspection personnel to check and eliminate the fault in time, prevent the explosion or internal leakage fault caused by overpressure, improve the safety and stability of the kiln, and reduce the production loss. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The utility model is a structural schematic view.

[0026] In the figure: 1, oil inlet pipe; 2, oil pump; 3, oil cylinder top cylinder electric contact pressure transmitter; 4, hydraulic valve group; 5, oil cylinder locking cylinder electric contact pressure transmitter; 6, oil filter station; 7, oil pump motor; 8, hydraulic oil filling port; 9, kiln car; 10, cylinder retracting oil pipe; 11, large-scale top machine oil cylinder; 12, top cylinder oil pipe; 13, front limit travel switch; 14, rear limit travel switch. DETAILED DESCRIPTION

[0027] The technical scheme in the utility model embodiment will be clearly and completely described below with reference to the drawings in the utility model embodiment. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0028] Reference Figure 1The device comprises an oil tank, an oil inlet pipe 1, an oil pump 2, a large-scale oil cylinder 11, a hydraulic valve group 4, and a first protection and early warning assembly. The oil tank is provided with a hydraulic oil filling port 8 for facilitating oil filling in the oil tank. The oil inlet pipe 1 is connected with the oil tank. The oil pump 2 is fixed on the oil tank and connected with the oil inlet pipe 1. An oil pump motor 7 is arranged between the oil inlet pipe 1 and the oil pump 2 to provide power for the operation of the oil pump 2, so that the oil pump 2 can work normally. The large-scale oil cylinder 11 is connected with the oil pump 2. The hydraulic valve group 4 is arranged between the large-scale oil cylinder 11 and the oil pump 2 and can control the communication and disconnection of the large-scale oil cylinder 11 and the oil pump 2. The hydraulic valve group 4 can be a plurality of electromagnetic control valves which are convenient for wireless connection control. The first protection and early warning assembly is arranged between the oil pump 2 and the hydraulic valve group 4 and electrically connected with the hydraulic valve group 4. The first protection and early warning assembly can realize the protection of the large-scale oil cylinder 11 and send an alarm signal, so that the kiln inspector can find the fault in time.

[0029] In some embodiments, the device further comprises a cylinder retracting oil pipe 10 and a cylinder lifting oil pipe 12. The cylinder retracting oil pipe 10 is arranged between the hydraulic valve group 4 and the oil return port of the large-scale oil cylinder 11. The cylinder retracting oil pipe 10 makes the hydraulic oil of the large-scale oil cylinder 11 flow back to the hydraulic valve group 4. The cylinder lifting oil pipe 12 is arranged between the hydraulic valve group 4 and the oil inlet port of the large-scale oil cylinder 11. The cylinder lifting oil pipe 12 realizes the delivery of the hydraulic oil to the large-scale oil cylinder 11.

[0030] In some embodiments, the device further comprises a second protection and early warning assembly and a second alarm. The second protection and early warning assembly comprises an oil cylinder locking cylinder electric contact pressure transmitter 5 which is arranged between the cylinder lifting oil pipe 12 and the hydraulic valve group 4 and electrically connected with the hydraulic valve group 4. The oil cylinder locking cylinder electric contact pressure transmitter 5 is used for monitoring the pressure of the large-scale oil cylinder 11 in the locking cylinder state. The oil cylinder locking cylinder electric contact pressure transmitter 5 can be a remote electric contact pressure transmitter and can realize the remote transmission of pressure data. The second alarm is arranged on the oil tank and electrically connected with the oil cylinder locking cylinder electric contact pressure transmitter 5. An overpressure protection value can be set. When the value measured by the oil cylinder locking cylinder electric contact pressure transmitter 5 reaches the overpressure protection value, the second alarm will send an alarm to remind the kiln inspector to observe in time. If the pressure further increases and reaches an overpressure protection pressure, the system will forcibly retract the cylinder to release pressure and protect the large-scale oil cylinder 11.

[0031] In some embodiments, the device further comprises an oil return filter station 6 which is arranged between the cylinder retracting oil pipe 10 and the hydraulic valve group 4 and can filter impurities in the returned oil to ensure the cleanliness of the hydraulic system and thus ensure the normal work of the hydraulic system.

[0032] In some embodiments, the first protection warning component includes a cylinder top cylinder electrical contact pressure transmitter 3 and a first alarm. The cylinder top cylinder electrical contact pressure transmitter 3 is arranged between the oil pump 2 and the hydraulic valve group 4 and is electrically connected with the hydraulic valve group 4. The cylinder top cylinder electrical contact pressure transmitter 3 can monitor the pressure of the cylinder during the cylinder top process and cooperate with the hydraulic valve group 4 to realize the control of the action of the large top machine cylinder 11. The first alarm is arranged on the oil tank and is electrically connected with the cylinder top cylinder electrical contact pressure transmitter 3. When the pressure exceeds the set value, the first alarm sends a warning signal. The cylinder top cylinder electrical contact pressure transmitter 3 can be a remote electrical contact hydraulic pressure transmitter, which can realize remote transmission of pressure data.

[0033] In some embodiments, the front limit travel switch 13 and the rear limit travel switch 14 are arranged between the large top machine cylinder 11 and the kiln car 9. Specifically, the front limit travel switch 13 is arranged on the side of the large top machine cylinder 11 in the top-out direction, which can limit the top-out travel of the large top machine cylinder 11. The rear limit travel switch 14 is arranged between the front limit travel switch 13 and the large top machine cylinder 11, which can limit the return travel of the cylinder. Through the cooperation of the front limit travel switch 13 and the rear limit travel switch 14, the precise control of the travel of the large top machine cylinder 11 can be realized, so that when the large top machine cylinder 11 sends the kiln car 9 to the position of the front limit travel switch 13, the front limit travel switch 13 locks the large top machine cylinder 11 and stops the kiln car 9, preventing the misalignment of the thermal expansion and contraction of the kiln car 9 in the firing kiln and the fire channel.

[0034] In some embodiments, the control system is electrically connected with the oil pump 2, the large top machine cylinder 11, the hydraulic valve group 4, the first protection warning component, the second protection warning component, the front limit travel switch 13 and the rear limit travel switch 14. Through the control of the control system, the automation of the device can be realized, thereby improving the response speed and work efficiency.

[0035] The specific working principle is as follows:

[0036] The oil pump motor 7 is started, and the oil in the oil tank is transported to the oil pump 2 through the oil inlet pipe 1, so that the oil pump 2 can work normally; the hydraulic valve group 4 controls the cylinder oil pipe 12, so that the large-scale cylinder oil cylinder 11 is communicated with the oil pump 2 through the cylinder oil pipe 12, so that the large-scale cylinder oil cylinder 11 is pushed out, and the kiln car 9 is pushed forward by the large-scale cylinder oil cylinder 11. In this process, the cylinder oil cylinder electric contact pressure transmitter 3 can monitor the cylinder oil cylinder pressure in real time. If the kiln car derails, the kiln car wheel is damaged, the bricks are inverted, or the kiln collapses, etc. in the kiln, the thrust of the large-scale cylinder oil cylinder 11 increases. When the measured value of the cylinder oil cylinder electric contact pressure transmitter 3 exceeds the normal working pressure setting value, the control system controls the first alarm to send an overpressure protection signal, reminding the kiln inspection personnel to check in time; when the measured value of the cylinder oil cylinder electric contact pressure transmitter 3 exceeds the overpressure protection setting value, a more serious fault may occur in the kiln, the control system stops the kiln car 9 from advancing, protects the large-scale cylinder oil cylinder 11, prevents the cylinder from being blown out due to overpressure, and prevents the fault from further expanding, increasing the maintenance time and cost.

[0037] When the large-scale cylinder oil cylinder 11 is pushed out to the position of the front limit position switch 13 and is positioned, the large-scale cylinder oil cylinder 11 pushes the kiln car 9 to the specified position, prevents the thermal expansion and contraction of the kiln car 9 from being out of position with the flue, and the hydraulic valve group 4 controls the cylinder locking cylinder. At this time, the cylinder locking cylinder electric contact pressure transmitter 5 monitors the locking cylinder pressure in real time. When the locking cylinder pressure exceeds the setting value, the control system controls the second alarm to send an alarm signal, reminding the kiln inspector to pay attention. If the pressure further increases to reach the overpressure protection setting value, the control system forcibly retreats the cylinder and releases the pressure through the hydraulic valve group 4, so as to protect the large-scale cylinder oil cylinder 11 from being damaged.

[0038] When the locking cylinder reaches a period (the specific time is determined according to the actual production situation), the oil pump motor 7 is started, the oil pump 2 works, the hydraulic valve group 4 controls the cylinder oil pipe 12, so that the large-scale cylinder oil cylinder 11 is communicated with the oil pump 2 through the cylinder oil pipe 10, and the large-scale cylinder oil cylinder 11 retreats. When the next kiln car 9 needs to be transported, the above steps are repeated.

[0039] The above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A large oil cylinder overpressure explosion cylinder protection early warning device, characterized in that: It comprises an oil tank; An oil inlet pipe (1) connected with the oil tank; An oil pump (2) fixed on the oil tank and connected with the oil inlet pipe (1); A large-scale oil cylinder (11) connected with the oil pump (2); A hydraulic valve group (4) arranged between the large-scale oil cylinder (11) and the oil pump (2) and capable of controlling the large-scale oil cylinder (11) to be connected with or disconnected from the oil pump (2); A first protection and early warning assembly arranged between the oil pump (2) and the hydraulic valve group (4) and electrically connected with the hydraulic valve group (4).

2. The overpressure explosion prevention and cylinder protection early warning device for a large oil cylinder according to claim 1, characterized in that: It further comprises a cylinder retracting oil pipe (10) arranged between the hydraulic valve group (4) and an oil return port of the large-scale oil cylinder (11); A cylinder jacking oil pipe (12) arranged between the hydraulic valve group (4) and an oil inlet port of the large-scale oil cylinder (11).

3. The overpressure explosion prevention and cylinder protection early warning device for large oil cylinders according to claim 2, characterized in that: It further comprises a second protection and early warning assembly comprising an oil cylinder locking and jacking electric contact pressure transmitter (5) arranged between the cylinder jacking oil pipe (12) and the hydraulic valve group (4) and electrically connected with the hydraulic valve group (4); A second alarm arranged on the oil tank and electrically connected with the oil cylinder locking and jacking electric contact pressure transmitter (5).

4. The overpressure explosion prevention and cylinder protection early warning device for large oil cylinders according to claim 3, characterized in that: The oil cylinder locking and jacking electric contact pressure transmitter (5) is a remote electric contact pressure transmitter.

5. The overpressure explosion prevention and protection early warning device for large oil cylinders according to claim 2, characterized in that: It further comprises an oil return filter station (6) arranged between the cylinder retracting oil pipe (10) and the hydraulic valve group (4).

6. The overpressure explosion prevention and protection early warning device for large oil cylinders according to claim 1, characterized in that: The first protection and early warning assembly comprises an oil cylinder jacking electric contact pressure transmitter (3) arranged between the oil pump (2) and the hydraulic valve group (4) and electrically connected with the hydraulic valve group (4); A first alarm arranged on the oil tank and electrically connected with the oil cylinder jacking electric contact pressure transmitter (3).

7. The overpressure explosion prevention and protection early warning device for large oil cylinders according to claim 6, characterized in that: The oil cylinder jacking electric contact pressure transmitter (3) is a remote electric contact hydraulic pressure transmitter.

8. The overpressure explosion prevention and protection early warning device for large oil cylinders according to claim 1, characterized in that: It further comprises a front limit position travel switch (13) arranged on one side of the large-scale oil cylinder (11) in a jacking direction; A rear limit position travel switch (14) arranged between the front limit position travel switch (13) and the large-scale oil cylinder (11).

Images