Mud gun hydraulic control system and mud gun operation method

Abstract

The invention relates to a mud gun hydraulic control system which comprises a mud gun hydraulic cylinder and a hydraulic control loop, the hydraulic control loop comprises a rodless cavity hydraulic pipeline, a rod cavity hydraulic pipeline and a pressure impact prevention module, the pressure impact prevention module comprises a transition pipeline, and the transition pipeline comprises two transition branch pipes and a bridging pipe. The two transition branch pipes are connected in parallel and then connected with the rodless cavity hydraulic pipeline and the rod cavity hydraulic pipeline respectively, the two ends of the bridging pipe are connected to the two transition branch pipes in a bypass mode respectively, and an anti-impact overflow valve is arranged on the bridging pipe. Each transition branch pipe is provided with two anti-impact one-way valves which are arranged on the two sides of a bypass connection point of the bridging pipe respectively, the two anti-impact one-way valves on each transition branch pipe are opposite in conduction direction, and the two anti-impact one-way valves arranged on the two transition branch pipes on each side of the bridging pipe are opposite in conduction direction. The invention further relates to a clay gun operation method. According to the clay gun, by arranging the pressure impact prevention module, hydraulic system pressure impact generated in the clay gun operation process can be well relieved, the action stability and safety of the clay gun are improved, and the service life of the clay gun is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of blast furnace ironmaking, and particularly relates to a hydraulic control system for a mud gun and a method for operating a mud gun. Background Art

[0002] In the field of blast furnace ironmaking, after the blast furnace taps molten iron, it is necessary to use a mud gun to hold the taphole, and then inject gunite to block the taphole for continuous smelting. Due to the high temperature and high pressure inside the furnace, it is necessary to ensure that the rodless cavity of the mud gun rotary hydraulic cylinder does not release pressure after the mud gun holds the taphole. Only in this way can the pressure inside the furnace be overcome to ensure that there is no mud leakage or molten iron overflow during gunite injection. At the same time, the speed at which the mud gun screws into the taphole should be fast enough to reduce the contact time between the gun nozzle and the molten iron flowing out of the taphole during the screwing-in process and avoid burning out the gun nozzle. During the gunite injection process, the gunite injection volume should also be observed in real time to ensure that the gunite injection volume is appropriate, so as to avoid the danger of molten iron overflow due to insufficient gunite injection and avoid situations such as waste caused by excessive gunite injection and difficulty in opening the taphole next time.

[0003] The rotation action of the mud gun is fast, with a large amplitude and a high pressure in the hydraulic system. When the mud gun impacts the taphole or returns to the standby position, a huge impact force is often generated, and the oil pressure of the mud gun hydraulic cylinder instantaneously rises greatly. Moreover, the mud gun itself is a cantilever structure, and this pressure impact will have certain adverse effects on the hydraulic system of the mud gun hydraulic cylinder, the mechanical structure of the mud gun itself, and the base, etc. At present, the prior art lacks research and control measures for this kind of pressure impact during the operation of the mud gun. Summary of the Invention

[0004] The present invention relates to a hydraulic control system for a mud gun and a method for operating a mud gun, which can at least solve some defects of the prior art.

[0005] The present invention relates to a hydraulic control system for a mud gun, which includes a mud gun hydraulic cylinder and a hydraulic control circuit. The hydraulic control circuit includes a rodless cavity hydraulic pipeline connected to the rodless cavity of the mud gun hydraulic cylinder and a rod cavity hydraulic pipeline connected to the rod cavity of the mud gun hydraulic cylinder. The hydraulic control circuit is configured with an anti-pressure impact module. The anti-pressure impact module includes a transition pipeline, and the transition pipeline includes two transition branch pipes and a bridge connection pipe. The two transition branch pipes are connected in parallel and then respectively connected to the rodless cavity hydraulic pipeline and the rod cavity hydraulic pipeline through a transition main pipe. Both ends of the bridge connection pipe are bypassed on the two transition branch pipes, and an anti-impact overflow valve is provided on the bridge connection pipe. Two anti-impact check valves are provided on each transition branch pipe, and the two anti-impact check valves are respectively arranged on both sides of the bypass connection point of the bridge connection pipe. The conduction directions of the two anti-impact check valves on each transition branch pipe are opposite, and the conduction directions of the two anti-impact check valves respectively arranged on the two transition branch pipes on each side of the bridge connection pipe are opposite.

[0006] As one of the embodiments, the anti-impact overflow valve adopts a direct-acting overflow valve.

[0007] As one of the implementation manners, the shock-proof check valve adopts a cartridge check valve.

[0008] As one of the implementation manners, there are two mud gun hydraulic cylinders, namely a rotary hydraulic cylinder and a mud pumping hydraulic cylinder respectively, and the hydraulic control circuit correspondingly has two groups, including a rotary hydraulic circuit connected to the rotary hydraulic cylinder and a mud pumping hydraulic circuit connected to the mud pumping hydraulic cylinder; the rotary hydraulic circuit and / or the mud pumping hydraulic circuit are configured with the anti-pressure shock module.

[0009] As one of the implementation manners, the rotary hydraulic circuit includes an automatic control rotary hydraulic circuit and a manual control rotary hydraulic circuit, which are connected in parallel and connected to the rotary hydraulic cylinder; the automatic control rotary hydraulic circuit and / or the manual control rotary hydraulic circuit are configured with the anti-pressure shock module.

[0010] As one of the implementation manners, the mud pumping hydraulic circuit includes an automatic control mud pumping hydraulic circuit and a manual control mud pumping hydraulic circuit, which are connected in parallel and connected to the mud pumping hydraulic cylinder; the automatic control mud pumping hydraulic circuit and / or the manual control mud pumping hydraulic circuit are configured with the anti-pressure shock module.

[0011] As one of the implementation manners, the hydraulic control circuit further includes a main control reversing valve, the pressure port of the main control reversing valve is connected to the main pressure oil pipe through a pressure oil branch pipe, the oil return port of the main control reversing valve is connected to the main oil return pipe through an oil return branch pipe, and the rodless cavity hydraulic pipeline and the rod cavity hydraulic pipeline are respectively connected to two working oil ports of the main control reversing valve.

[0012] As one of the implementation manners, the main control reversing valve adopts an electro-hydraulic proportional valve.

[0013] The present invention also provides a mud gun operation method, which is implemented based on the above-mentioned mud gun hydraulic control system;

[0014] Wherein, the rotary hydraulic cylinder is driven to act through the rotary hydraulic circuit, so that the mud gun advances to the mud pumping position or retreats to the standby position;

[0015] The mud pumping hydraulic cylinder is driven to act through the mud pumping hydraulic circuit, so that the piston rod of the mud pumping hydraulic cylinder extends to pump mud or retracts for loading mud.

[0016] As one of the implementation manners, in the anti-pressure shock module, an impact pressure upper limit value is set for the anti-shock overflow valve to meet the anti-pressure shock requirements of the corresponding mud gun hydraulic cylinder.

[0017] The present invention has at least the following beneficial effects:

[0018] In the present invention, by providing an anti-pressure shock module, the pressure shock of the hydraulic system generated during the operation of the mud gun can be better alleviated, and the action stability, safety and service life of the mud gun can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the mud gun hydraulic control system provided by the embodiment of the present invention;

[0021] Figure 2 It is a schematic structural diagram of the mud gun rotation hydraulic control system provided by the embodiment of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the mud gun ramming hydraulic control system provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] Embodiment 1

[0025] As Figure 1 and Figure 2 , the embodiment of the present invention provides a mud gun rotation hydraulic control system, including a rotation hydraulic cylinder 100 and a rotation hydraulic circuit,

[0026] The rotation hydraulic circuit includes a rotation control directional valve 105, a first rotation hydraulic pipeline 103 connected to the rodless cavity of the rotation hydraulic cylinder 100, and a second rotation hydraulic pipeline 104 connected to the rod cavity of the rotation hydraulic cylinder 100.

[0027] The pressure port of the rotation control directional valve 105 is connected to a first pressure oil branch pipe (shown in the figure, not labeled) for connecting to the main pressure oil pipe 300, and the oil return port of the rotation control directional valve 105 is connected to a first oil return branch pipe (shown in the figure, not labeled) for connecting to the main oil return pipe 400; the first rotation hydraulic pipeline 103 and the second rotation hydraulic pipeline 104 are respectively connected to two working oil ports of the rotation control directional valve 105;

[0028] Cut-off valves (shown but not labeled) are provided on the first rotary hydraulic pipeline 103, the second rotary hydraulic pipeline 104, and the first pressure oil branch pipe. The cut-off valves include, but are not limited to, ball valves.

[0029] In one embodiment, as Figure 2 , a first check valve (shown but not labeled) is provided on the first oil return branch pipe, including, but not limited to, a pipe-type check valve, which can prevent the hydraulic oil in the main oil return pipe 400 from flowing back into the first oil return branch pipe, resulting in malfunction or oil leakage.

[0030] In one embodiment, the above-mentioned rotary hydraulic circuit is an automatic control circuit, and the above-mentioned rotary control reversing valve 105 is an electro-hydraulic proportional valve. During one operation process, by adjusting the instantaneous input signal of the electro-hydraulic proportional valve, the opening degree of the electro-hydraulic proportional valve can be adjusted, and then the hydraulic oil flow rate passing through the electro-hydraulic proportional valve can be adjusted, so as to achieve the function of real-time adjusting the rotation speed of the mud gun; due to the large weight and inertia of the mud gun, when the mud gun rotates and starts and returns to the standby position, a slower speed is beneficial to reducing vibration and impact and protecting the mud gun, while when approaching the taphole, a faster speed is required to avoid the molten iron burning the nozzle of the gun. Therefore, using an electro-hydraulic proportional valve to adjust the rotation speed of the mud gun in real time can improve the reliability and safety of the mud gun operation.

[0031] In one embodiment, as Figure 2 , a sequence valve 106 is provided on the second rotary hydraulic pipeline 104. An overflow bypass is connected between the first rotary hydraulic pipeline 103 and the second rotary hydraulic pipeline 104. A bypass overflow valve 107 and a bypass check valve 108 are provided on the overflow bypass. Among them, the sequence valve 106 is located between the overflow bypass and the rotary control reversing valve 105. Specifically, the bypass connection point of the overflow bypass on the first rotary hydraulic pipeline 103 is defined as the first bypass connection point, and the bypass connection point on the second rotary hydraulic pipeline 104 is defined as the second bypass connection point. On the second rotary hydraulic pipeline 104, the sequence valve 106 is located on the side close to the rotary control reversing valve 105 of the second bypass connection point. On the overflow bypass, the first bypass connection point, the bypass check valve 108, the bypass overflow valve 107, and the second bypass connection point are distributed in sequence; the control oil source pipe of the sequence valve 106 is bypass-connected to the first rotary hydraulic pipeline 103, and the conduction direction of the bypass check valve 108 is from the second bypass connection point to the first bypass connection point;

[0032] Among them, the above-mentioned sequence valve 106 is preferably a pilot-operated sequence valve, and the above-mentioned bypass overflow valve 107 is preferably a pilot-operated overflow valve, which is more accurate for the control of the rotary hydraulic circuit. The above-mentioned bypass check valve 108 includes, but is not limited to, a plate-type check valve.

[0033] Based on the above design, the hydraulic oil in the rod chamber of the rotary hydraulic cylinder 100 flows through the second rotary hydraulic pipeline 104 to the inlet of the sequence valve 106 and the bypass relief valve 107. The opening pressure of the sequence valve 106 is preferably set to the system pressure, and its control oil port X is connected to the first rotary hydraulic pipeline 103. During the forward movement of the mud gun, the load is not large, and the working pressure of the first rotary hydraulic pipeline 103 is lower than the system pressure, so the sequence valve 106 does not open, and the side check valve of the sequence valve 106 in this direction is blocked; and the opening pressure of the bypass relief valve 107 is set to be low (much lower than the system pressure), and its control oil port X is connected to the second On the rotating hydraulic pipeline 104, and at this time the second rotating hydraulic pipeline 104 is connected to the main oil return pipe 400, the pressure is low, so when the piston rod of the rotating hydraulic cylinder 100 extends, the oil pressure between the rod chamber of the rotating hydraulic cylinder 100 and the sequence valve 106 rises to the opening pressure of the bypass relief valve 107 (the sequence valve 106 is still closed at this time), the bypass relief valve 107 opens, and the hydraulic oil in the rod chamber is replenished to the first rotating hydraulic pipeline 103 through the bypass relief valve 107 and the bypass check valve 108, replenishing the oil for the mud gun rotation, which is beneficial to meet the maximum speed requirement of the mud gun rotation and improve the response speed of the mud gun rotation.

[0034] After the mud gun rotates to the working position and the gun nozzle presses against the iron mouth, the rotation control reversing valve 105 returns to the middle position and the valve core does not move. At this time, the pressure of the first rotary hydraulic pipeline 103 rises to the system pressure. At this time, the sequence valve 106 opens, and the hydraulic oil in the second rotary hydraulic pipeline 104 flows back to the main return oil pipe 400 through the sequence valve 106, and the rod chamber is depressurized. In this way, the pressure of the rodless chamber is used to press against the iron mouth, and there is no need to offset the oil pressure of the rod chamber. This can ensure sufficient sealing pressure between the gun mud and the iron mouth when mud is beaten to prevent mud leakage.

[0035] In one embodiment, Figure 2 A first hydraulically controlled one-way valve 109 is provided on the first rotary hydraulic pipeline 103. The outlet of the first hydraulically controlled one-way valve 109 is a channel port close to the rodless chamber of the rotary hydraulic cylinder. The control oil port of the first hydraulically controlled one-way valve 109 is connected to the second rotary hydraulic pipeline 104. The first hydraulically controlled one-way valve 109 can play a role in maintaining the pressure of the rodless chamber; when an overflow bypass is provided, the first bypass connection point is preferably located between the first hydraulically controlled one-way valve 109 and the rotary hydraulic cylinder 100. Specifically, after the mud gun is against the iron mouth, the hydraulic oil in the second rotary hydraulic pipeline 104 flows back to the main return oil pipe 400 through the sequence valve 106, and the pressure of the control oil port X of the first hydraulically controlled one-way valve 109 is low, and the hydraulically controlled one-way valve is closed at this time; when an overflow bypass is provided, since the bypass one-way valve 108 is also unblocked, the oil pressure between the rodless chamber of the rotary hydraulic cylinder 100 and the first hydraulically controlled one-way valve 109 is locked, and the rotary hydraulic cylinder 100 is locked against the iron mouth, thereby ensuring the reliability of the mud gun.

[0036] When the clay gun advances, the rotation control directional valve 105 acts (for example, in the right valve position), and the pressure oil sequentially enters the rodless cavity of the clay gun rotation hydraulic cylinder through the first pressure oil branch pipe, the rotation control directional valve 105, and the first rotation hydraulic pipeline 103, pushing the piston rod to extend, and the clay gun advances.

[0037] When the clay gun returns, the rotation control directional valve 105 acts (assuming that when the clay gun advances, the rotation control directional valve 105 is in the right valve position, then when the clay gun returns, the rotation control directional valve 105 is in the left valve position). The pressure oil sequentially passes through the first pressure oil branch pipe, the rotation control directional valve 105, and the side check valve of the sequence valve 106 (oil can pass through in this direction) to the inlet of the bypass overflow valve 107. Since the control oil port X of the bypass overflow valve 107 is connected to the second rotation hydraulic pipeline 104, and the oil pressure of the second rotation hydraulic pipeline 104 is relatively high at this time, the bypass overflow valve 107 does not open. The pressure oil enters the rod cavity of the clay gun rotation hydraulic cylinder 100 through the second rotation hydraulic pipeline 104, pushing the piston rod to retract, and the clay gun returns. At this time, the hydraulic oil in the rodless cavity of the rotation hydraulic cylinder 100 passes through the first rotation hydraulic pipeline 103 to the inlet of the first pilot-operated check valve 109. Since the control oil port of the first pilot-operated check valve 109 is connected to the second rotation hydraulic pipeline 104, and the oil pressure of the second rotation hydraulic pipeline 104 is relatively high at this time, the first pilot-operated check valve 109 can be opened. At this time, the hydraulic oil in the rodless cavity of the rotation hydraulic cylinder 100 can return to the oil tank through the first pilot-operated check valve 109, the rotation control directional valve 105, and the first oil return branch pipe.

[0038] In one embodiment, as Figure 2 , the rotation hydraulic circuit further includes a first pressure-holding pipeline (shown but not labeled). The first end of the first pressure-holding pipeline is bypass-connected to the first pressure oil branch pipe, and the second end of the first pressure-holding pipeline is bypass-connected to the first rotation hydraulic pipeline 103;

[0039] When a first pilot-operated check valve 109 is provided on the first rotation hydraulic pipeline 103, the second end of the first pressure-holding pipeline is preferably located between the first pilot-operated check valve 109 and the rotation hydraulic cylinder 100;

[0040] A second pilot-operated check valve 110 is provided on the first pressure-holding pipeline and is configured with a pressure-holding control module for controlling the on / off of the second pilot-operated check valve 110. Among them, preferably, as Figure 2 , the pressure-holding control module includes a pressure-holding control bypass (shown but not labeled) and a pressure-holding directional valve 111. The first end of the pressure-holding control bypass is bypass-connected to the first pressure oil branch pipe / the first pressure-holding pipeline, the second end is connected to the pressure port of the pressure-holding directional valve 111. The oil return port of the pressure-holding directional valve 111 is connected with a first oil drain branch pipe for connecting to the main oil drain pipe 500, and one of the working oil ports of the pressure-holding directional valve 111 is communicated with the control oil port of the second pilot-operated check valve 110.

[0041] When the first end of the pressure-holding control bypass is bypassed on the first pressure-holding pipeline, this first end is located between the first end of the first pressure-holding pipeline and the second hydraulic check valve 110.

[0042] When the pressure in the rodless cavity of the rotary hydraulic cylinder 100 drops too fast, a mud leakage condition may occur, affecting the normal operation of the mud gun, and even causing molten iron to overflow and other situations, resulting in danger. By setting the first pressure-holding pipeline, hydraulic oil can be supplemented to the first rotary hydraulic pipeline 103 to improve the pressure stability of the rodless cavity of the rotary hydraulic cylinder 100.

[0043] The above-mentioned pressure-holding reversing valve 111 is preferably an electromagnetic reversing valve, which is convenient for automatic control, including but not limited to using a two-position four-way electromagnetic reversing valve.

[0044] Among them, as Figure 2 , a first pressure measurement unit 120 is provided on the first rotary hydraulic pipeline 103 for real-time detection of the oil pressure in the first rotary hydraulic pipeline 103. When pressure-holding is performed on the rodless cavity of the rotary hydraulic cylinder 100, the pressure of the rodless cavity of the rotary hydraulic cylinder 100 can be detected and known through this first pressure measurement unit 120. The mud gun rotary hydraulic control system further includes a central controller, and the above-mentioned pressure-holding reversing valve 111 and the first pressure measurement unit 120 are both electrically connected or communicatively connected to the central controller. The first pressure measurement unit 120 includes but is not limited to installing a pressure measurement and exhaust joint on the first rotary hydraulic pipeline 103, and connecting a pressure gauge to the pressure measurement and exhaust joint through a pressure measurement hose.

[0045] Further preferably, as Figure 2 , a second check valve 112 is further provided on the first pressure-holding pipeline. The second check valve 112 is located between the second hydraulic check valve 110 and the second end of the first pressure-holding pipeline, and the conduction direction of the second check valve 112 is from the second hydraulic check valve 110 to the second end of the first pressure-holding pipeline. The second check valve 112 can ensure that the oil in the rodless cavity of the rotary hydraulic cylinder 100 and the first rotary hydraulic pipeline 103 will not flow back to the second hydraulic check valve 110, causing misoperation.

[0046] Taking the pressure-holding reversing valve 111 as a two-position four-way electromagnetic reversing valve as an example, the operation of the above-mentioned first pressure-holding pipeline will be described below:

[0047] When the mud gun abuts against the taphole and the pressure in the rodless cavity of the rotary hydraulic cylinder 100 drops rapidly, the electromagnet of the two-position four-way electromagnetic directional valve is energized. The two-position four-way electromagnetic directional valve is in the left valve position. The pressure oil passes through the first pressure oil branch pipe, the pressure-holding control bypass, the P port and the B port of the pressure-holding directional valve 111, and acts on the control oil port X of the second pilot-operated check valve 110. At this time, the main spool of the second pilot-operated check valve 110 opens, and the pressure oil is further supplemented to the first rotary hydraulic pipeline 103 through the second pilot-operated check valve 110 to ensure that the pressure in the rodless cavity of the rotary hydraulic cylinder 100 does not drop, so that the mud gun works normally. If the rodless cavity of the rotary hydraulic cylinder 100 does not need pressure holding, the electromagnet of the two-position four-way electromagnetic directional valve is de-energized. The two-position four-way electromagnetic directional valve is in the right valve position. At this time, the control port X of the second pilot-operated check valve 110 is connected to the main drain pipe 500, and the second pilot-operated check valve 110 does not open, and the pressure oil will not be supplemented to the first rotary hydraulic pipeline 103.

[0048] In one embodiment, the rotary hydraulic circuit further includes a second pressure-holding pipeline (shown but not labeled). One end of the second pressure-holding pipeline is provided with an accumulator 113 for storing pressure oil. The outlet end of the second pressure-holding pipeline is communicated with the rodless cavity of the rotary hydraulic cylinder 100. A safety valve 114 is provided on the second pressure-holding pipeline. The safety valve 114 is located between the accumulator 113 and the outlet end of the second pressure-holding pipeline for controlling the on-off of the second pressure-holding pipeline. Among them, the above-mentioned safety valve 114 includes but is not limited to a ball valve.

[0049] Further, as Figure 2 shown, an oil drain bypass is connected in parallel to the second pressure-holding pipeline, and an unloading ball valve 115 is provided on the oil drain bypass. The oil drain bypass can be connected to the main return pipe 400; further, an overflow branch can be connected in parallel to the second pressure-holding pipeline. The overflow branch can also be connected in parallel to the above-mentioned oil drain bypass and both ends are located on both sides of the unloading ball valve 115. A branch overflow valve 116 is provided on the overflow branch. When it is necessary to unload and repair the accumulator 113 or the pressure in the accumulator 113 exceeds the safety pressure set by the branch overflow valve 116, the pressure oil in the accumulator 113 can be drained to the main return pipe 400. Among them, the above-mentioned safety valve 114, unloading ball valve 115 and branch overflow valve 116 can form a safety valve 114 group.

[0050] The above-mentioned second pressure-holding pipeline can be connected in parallel to the first rotary hydraulic pipeline 103; in another embodiment, as Figure 2 shown, when the first pressure-holding pipeline and the second pressure-holding pipeline are provided at the same time, the second pressure-holding pipeline can also be connected in parallel to the first pressure-holding pipeline. When the first rotary hydraulic pipeline 103 / first pressure-holding pipeline is feeding oil, the above-mentioned safety valve 114 is opened, and the pressure oil can also be supplemented to the accumulator 113.

[0051] Preferably, taking the case where the second pressure-holding pipeline is connected in parallel to the first pressure-holding pipeline as an example, as Figure 2 , a third one-way valve 117 is further provided on the first pressure-holding pipeline. The conduction direction of the third one-way valve 117 is from the first end of the first pressure-holding pipeline to the direction of the second hydraulic control one-way valve 110, which can ensure that the pressure oil stored in the accumulator 113 is only used for pressure-holding and will not flow back into the main pressure oil pipeline 300 due to the low pressure of the main pressure oil pipeline 300, ensuring that the accumulator 113 always stores a sufficient amount of pressure oil for pressure-holding.

[0052] The pressure oil stored in the accumulator 113 can be supplemented to the rodless cavity of the rotary hydraulic cylinder 100. In this way, even if the pump station stops supplying pressure oil due to power failure, the pressure oil stored in the accumulator 113 can also ensure the pressure-holding effect of the rodless cavity of the rotary hydraulic cylinder, ensuring the safe and reliable operation of the mud gun. Moreover, since after ramming the mud, the mud gun needs to hold the iron notch for 15 - 30 minutes until the ramming mud bakes and hardens, due to the setting of the accumulator 113, the hydraulic pump of the pump station can be stopped, and only the pressure oil stored in the accumulator 113 is used to meet the pressure-holding requirement, so it is more energy-saving.

[0053] As Figure 2 , a second pressure-measuring unit (shown in the figure but not labeled) can be provided on the second rotary hydraulic pipeline 104. The structure of the second pressure-measuring unit can refer to the structure of the first pressure-measuring unit 120, which will not be elaborated here.

[0054] The rotary hydraulic circuit provided in this embodiment can be an automatic control circuit. As described above, the rotary control directional valve 105 can adopt an electro-hydraulic proportional valve, and the above-mentioned pressure-holding directional valve 111 can adopt an electromagnetic directional valve. The rotary hydraulic circuit provided in this embodiment can also be a manual control circuit, and both the rotary control directional valve 105 and the pressure-holding directional valve 111 adopt manual directional valves.

[0055] As Figure 1 and Figure 2 , a manually controlled rotary hydraulic circuit is provided. Since the manual directional valve does not have the function of adjusting the flow rate in real time, a one-way oil return throttle valve 118 and a one-way oil inlet throttle valve 119 are provided on its first rotary hydraulic pipeline 103, which can respectively adjust the speed of the mud gun retracting and the mud gun advancing. Among them, the one-way oil return throttle valve 118 is located on the side of the one-way oil inlet throttle valve 119 away from the rotary hydraulic cylinder 100.

[0056] Among them, in the rotation trajectory of the clay gun, the elevation of the standby position is relatively low. To prevent the clay gun from stalling due to its own weight when retracting, an oil return throttle valve is used for speed regulation. When the clay gun retracts, the hydraulic oil in the rodless chamber of the rotary hydraulic cylinder 100 returns to the oil tank through the left bypass check valve of the one-way inlet throttle valve 119 and the throttle spool of the one-way oil return throttle valve 118. The flow rate is regulated by the throttle spool of the one-way oil return throttle valve 118, thereby regulating the retracting speed of the clay gun. Moreover, back pressure is established to overcome the influence of the clay gun's own weight and prevent stalling and large vibrations. When the clay gun advances, the speed is often fast, and the hydraulic oil flow rate and pressure in the first rotary hydraulic pipeline 103 are large. To avoid unnecessary energy consumption and heat generation caused by high back pressure, inlet throttle speed regulation is adopted. Specifically, when the clay gun advances, the pressure oil enters the rodless chamber of the rotary hydraulic cylinder 100 through the left bypass check valve of the one-way oil return throttle valve 118 and the throttle spool of the one-way inlet throttle valve 119. The flow rate is regulated by the throttle spool of the one-way inlet throttle valve 119, thereby regulating the advancing speed of the clay gun. Based on the above operations, according to the different working conditions requirements of the clay gun advancing and retracting, the inlet and oil return throttle speed regulation methods are respectively selected, which is more conducive to the operation of the clay gun and improves the stability and reliability of the clay gun's work.

[0057] As Figure 1 and Figure 2 , in one embodiment, the rotary hydraulic control system of the clay gun includes an automatic control rotary hydraulic circuit 101 and a manual control rotary hydraulic circuit 102. The two are connected in parallel and connected to the rotary hydraulic cylinder 100. The automatic control rotary hydraulic circuit 101 and the manual control rotary hydraulic circuit 102 can be used as backups for each other, improving the reliability and safety of the rotary operation of the clay gun.

[0058] Embodiment 2

[0059] As Figure 1 and Figure 3 , an embodiment of the present invention provides a clay gun mud pumping hydraulic control system, including a mud pumping hydraulic cylinder 200 and a mud pumping hydraulic circuit.

[0060] The mud pumping hydraulic circuit includes a mud pumping control reversing valve 203, a first mud pumping hydraulic pipeline 208 connected to the rodless chamber of the mud pumping hydraulic cylinder 200, and a second mud pumping hydraulic pipeline 209 connected to the rodless chamber of the mud pumping hydraulic cylinder 200.

[0061] The pressure port of the mud pumping control reversing valve 203 is connected to a second pressure oil branch pipe (shown but not labeled) for connecting to the main pressure oil pipe 300, and the oil return port of the mud pumping control reversing valve 203 is connected to a second oil return branch pipe (shown but not labeled) for connecting to the main oil return pipe 400; the first mud pumping hydraulic pipeline 208 and the second mud pumping hydraulic pipeline 209 are respectively connected to two working oil ports of the mud pumping control reversing valve 203.

[0062] Cut-off valves (shown but not labeled) are provided on the first mud ramming hydraulic pipeline 208, the second mud ramming hydraulic pipeline 209, and the second pressure oil branch pipe. The cut-off valve includes, but is not limited to, a ball valve.

[0063] In one embodiment, as Figure 3 , a fourth one-way valve (shown but not labeled) is provided on the second oil return branch pipe, including, but not limited to, a pipe-type one-way valve, which can prevent the hydraulic oil in the main oil return pipe 400 from flowing back into the second oil return branch pipe, resulting in malfunction or oil leakage.

[0064] The mud ramming hydraulic circuit provided in this embodiment can be an automatic control circuit, and the above-mentioned mud ramming control directional valve 203 can be an electro-hydraulic directional valve; the mud ramming hydraulic circuit provided in this embodiment can also be a manual control circuit, and the above-mentioned mud ramming control directional valve 203 then uses a manual directional valve.

[0065] In one embodiment, as Figure 3 , the above-mentioned mud ramming hydraulic circuit is configured with a double one-way throttle valve 204. The first one-way throttle valve group of the double one-way throttle valve 204 is arranged on the first mud ramming hydraulic pipeline 208, and the second one-way throttle valve group of the double one-way throttle valve 204 is arranged on the second mud ramming hydraulic pipeline 209. Based on this design, the ramming speed and retracting speed of the mud ramming hydraulic cylinder 200 can be reliably adjusted, improving the working reliability of the mud ramming hydraulic cylinder 200; the use of the double one-way throttle valve 204 has the advantage of high control accuracy.

[0066] In another embodiment, the above-mentioned mud ramming control directional valve 203 can be designed as an electro-hydraulic proportional valve, and the purpose of adjusting the ramming speed and retracting speed of the mud ramming hydraulic cylinder 200 can also be achieved; at this time, the above-mentioned double one-way throttle valve 204 can be cancelled.

[0067] Further preferably, as Figure 3 , third hydraulic control one-way valves are provided on both the first mud ramming hydraulic pipeline 208 and the second mud ramming hydraulic pipeline 209. The control oil port of the third hydraulic control one-way valve on the first mud ramming hydraulic pipeline 208 is connected to the second mud ramming hydraulic pipeline 209, and the control oil port of the third hydraulic control one-way valve on the second mud ramming hydraulic pipeline 209 is connected to the first mud ramming hydraulic pipeline 208. After the mud ramming is completed / after the mud ramming hydraulic cylinder 200 retracts, the mud ramming control directional valve 203 returns to the neutral position, and the A port and B port (i.e., the two working oil ports) of the mud ramming control directional valve 203 are both connected to the main oil return pipe 400. At this time, both third hydraulic control one-way valves lock the pipeline pressure, which can keep the mud ramming hydraulic cylinder 200 stationary, avoiding the situation that the mud gun returns to the mud ramming cavity of the mud gun due to insufficient pressure of the mud ramming hydraulic cylinder 200 before the gun mud is baked and hardened by the high temperature in the furnace. Optionally, as Figure 3 , the two third hydraulic control one-way valves can be combined into a double hydraulic control one-way valve 205, and the above-mentioned pressure locking effect is better.

[0068] Taking the electro-hydraulic directional control valve 203 used for the mud ramming control directional control valve as an example, the working process of the above-mentioned hydraulic control system for the mud gun mud ramming is roughly described as follows:

[0069] Taking the left side of the double one-way throttle valve 204 and the left side of the double hydraulic control one-way valve 205 being connected to the first mud ramming hydraulic pipeline 208 as an example, when starting to ram mud, the electromagnet of the mud ramming control directional control valve 203 is energized, and the mud ramming control directional control valve 203 is in the right valve position. The pressure oil passes through the second pressure oil branch pipe, the P port and the A port of the mud ramming control directional control valve 203, the left side of the double hydraulic control one-way valve 205, and the bypass one-way valve on the left side of the double one-way throttle valve 204 (i.e., the bypass one-way valve of the first one-way throttle valve group) and enters the rodless cavity of the mud ramming hydraulic cylinder 200, pushing the piston rod to extend and starting to ram mud; at this time, the hydraulic oil in the rod chamber of the mud ramming hydraulic cylinder 200 passes through the right side of the double one-way throttle valve 204 (the bypass one-way valve of the second one-way throttle valve group is not open, and the oil return passes through the throttle valve main spool of the second one-way throttle valve group), the right side of the double hydraulic control one-way valve 205 (the control oil port on the right side is connected to the first mud ramming hydraulic pipeline 208, so this right side one-way valve is open), the B port and the T port of the mud ramming control directional control valve 203, and the second oil return branch pipe and returns to the main oil return pipe 400. By adjusting the opening degree of the main spool on the right side of the double one-way throttle valve 204 (i.e., the opening degree of the throttle valve main spool of the second one-way throttle valve group), the oil return flow rate of the mud ramming can be adjusted, and thus the mud ramming speed can be adjusted.

[0070] After the mud gun retracts to the standby position, if mud filling is required, the mud pumping hydraulic cylinder 200 needs to be retracted, so that the electromagnet of the mud pumping control directional valve 203 is energized. The mud pumping control directional valve 203 is in the left valve position. The pressure oil passes through the second pressure oil branch pipe, the P port and the B port of the mud pumping control directional valve 203, the right side of the double pilot-operated check valve 205, and the bypass check valve on the right side of the double one-way throttle valve 204 (i.e., the bypass check valve of the second one-way throttle valve group) and enters the rod chamber of the mud pumping hydraulic cylinder 200 to push the piston rod to retract. At this time, the hydraulic oil in the rodless chamber of the mud pumping hydraulic cylinder 200 passes through the left side of the double one-way throttle valve 204 (the bypass check valve of the first one-way throttle valve group is blocked, and the oil return passes through the throttle valve spool of the first one-way throttle valve group), the left side of the double pilot-operated check valve 205 (the control oil port on the left side is connected to the second mud pumping hydraulic pipeline 209, so the left check valve is open), the A port and the T port of the mud pumping control directional valve 203, and the second oil return branch pipe and returns to the main oil return pipe 400. By adjusting the opening of the main spool on the left side of the double one-way throttle valve 204 (i.e., the opening of the throttle valve spool of the first one-way throttle valve group), the oil return flow rate of the mud pumping hydraulic cylinder 200 during retraction can be adjusted, and thus the retraction speed can be adjusted. After the mud pumping hydraulic cylinder 200 retracts, the mud pumping control directional valve 203 returns to the neutral position. The A port and the B port of the mud pumping control directional valve 203 are both connected to the main oil return pipe 400. At this time, the left and right sides of the double pilot-operated check valve 205 lock the pipeline pressure, and the mud pumping hydraulic cylinder 200 remains stationary, and mud filling can start.

[0071] As Figure 1 and Figure 3 , in one embodiment, the mud pumping hydraulic control system of the mud gun includes an automatic control mud pumping hydraulic circuit 201 and a manual control mud pumping hydraulic circuit 202. The two are connected in parallel and connected to the mud pumping hydraulic cylinder 200. The automatic control mud pumping hydraulic circuit 201 and the manual control mud pumping hydraulic circuit 202 can be used as backups for each other, improving the reliability and safety of the mud pumping operation of the mud gun.

[0072] In one of the embodiments, as Figure 3 , a flow meter 206 is provided on the second mud pumping hydraulic pipeline 209, which can monitor the hydraulic oil flow rate in the second mud pumping hydraulic pipeline 209 in real time. Especially during the mud pumping process, it can monitor the oil return flow rate of the mud pumping hydraulic cylinder 200 in real time, calculate the stroke of the mud pumping hydraulic cylinder 200, and then obtain the mud pumping volume, enabling real-time monitoring of the mud pumping volume during the mud pumping process, improving the reliability and safety of the mud pumping operation of the mud gun, avoiding excessive mud pumping that increases the difficulty of the next taphole opening operation and causes waste of gun mud, and avoiding dangerous situations such as molten iron overflow due to insufficient mud pumping. A maintenance bypass can be set on the second mud pumping hydraulic pipeline 209 to facilitate the maintenance of the flow meter 206.

[0073] In one of the embodiments, as Figure 3A third pressure measuring unit 207 is provided on the first mud pumping hydraulic pipeline 208. The structure of the third pressure measuring unit 207 can be referenced to that of the first pressure measuring unit 120 and will not be described in detail here. This third pressure measuring unit 207 can monitor the changes in the rodless chamber pressure of the mud pumping hydraulic cylinder 200 in real time during the mud pumping process of the mud gun, thereby determining the progress of the mud pumping. As the amount of mud pumped increases, the rodless chamber pressure of the mud pumping hydraulic cylinder 200 also increases. When the required amount of mud pumped from the taphole is reached, the rodless chamber pressure of the mud pumping hydraulic cylinder 200 rises to a certain value, indicating that the mud pumping is sufficient.

[0074] In particular, the above-mentioned flow meter 206 and the third pressure measuring unit 207 can serve as backup for each other and verify each other, further improving the process monitoring of the mud gun mud operation with higher reliability; and can also avoid the situation where the actual mud volume is too small. Even if the iron mouth or mud bag is damaged, it can also ensure that the mud volume is matched.

[0075] When the automatic control mud hydraulic circuit 201 and the manual control mud hydraulic circuit 202 are connected in parallel, as shown in FIG. Figure 3 The flow meter 206 is preferably provided on the hydraulic pipeline main pipe on the rod chamber side of the mud hydraulic cylinder 200 . The third pressure measuring unit 207 is preferably provided on the hydraulic pipeline main pipe on the rodless chamber side of the mud hydraulic cylinder 200 .

[0076] Example 3

[0077] like Figure 1 The embodiment of the present invention provides a mud gun hydraulic control system, including a rotary hydraulic cylinder 100 and a mud-making hydraulic cylinder 200. The rotary hydraulic cylinder 100 is equipped with a rotary hydraulic circuit, and the mud-making hydraulic cylinder 200 is equipped with a mud-making hydraulic circuit.

[0078] The rotary hydraulic circuit adopts the rotary hydraulic circuit provided in the above-mentioned embodiment 1, and / or the mud-making hydraulic circuit adopts the rotary hydraulic circuit provided in the above-mentioned embodiment 2. The specific structures are not described in detail here.

[0079] This embodiment also provides a mud gun operation method, wherein a rotary hydraulic cylinder 100 is driven by a rotary hydraulic circuit to move the mud gun to a mud-splitting position or to a standby position. The relevant control method of the rotary hydraulic cylinder 100 can refer to the relevant content of the first embodiment and will not be described in detail here.

[0080] The mud-making hydraulic cylinder 200 is driven by the mud-making hydraulic circuit to move the piston rod of the mud-making hydraulic cylinder 200 so as to extend for mud-making or retract for mud-loading. The relevant control method of the mud-making hydraulic cylinder 200 can refer to the relevant content in Example 2 and will not be repeated here.

[0081] Example 4

[0082] An embodiment of the present invention provides a hydraulic control system for a clay gun, which includes a clay gun hydraulic cylinder and a hydraulic control circuit. The hydraulic control circuit includes a rodless cavity hydraulic pipeline connected to the rodless cavity of the clay gun hydraulic cylinder and a rod cavity hydraulic pipeline connected to the rod cavity of the clay gun hydraulic cylinder.

[0083] As Figures 1-3 , preferably, a pressure shock prevention module is provided between the rodless cavity hydraulic pipeline and the rod cavity hydraulic pipeline. The pressure shock prevention module includes a transition pipeline (shown but not labeled). The transition pipeline includes two transition branch pipes (shown but not labeled) and a bridge connection pipe (shown but not labeled). After the two transition branch pipes are connected in parallel, they are respectively connected to the rodless cavity hydraulic pipeline and the rod cavity hydraulic pipeline through a transition main pipe. Both ends of the bridge connection pipe are bypassed on the two transition branch pipes, and a shock prevention overflow valve 601 is provided on the bridge connection pipe. Two shock prevention check valves 602 are provided on each transition branch pipe, and the two shock prevention check valves 602 are respectively arranged on both sides of the bypass connection point of the bridge connection pipe. The conduction directions of the two shock prevention check valves 602 on each transition branch pipe are opposite. The conduction directions of the two shock prevention check valves 602 respectively arranged on the two transition branch pipes on each side of the bridge connection pipe are opposite (that is, the conduction directions of the two shock prevention check valves 602 on the side of the transition branch pipe close to the rodless cavity hydraulic pipeline are opposite, and the conduction directions of the two shock prevention check valves 602 on the side of the transition branch pipe close to the rod cavity hydraulic pipeline are opposite).

[0084] Among them, the above shock prevention overflow valve 601 can adopt a direct-acting overflow valve, and the shock prevention overflow valve 601 has an impact pressure upper limit value; the above shock prevention check valve 602 can adopt a cartridge check valve.

[0085] In the direction from the rodless cavity hydraulic pipeline to the rod cavity hydraulic pipeline, the two impact-proof check valves 602 on one of the transition branch pipes are defined as the first impact-proof check valve 602 and the second impact-proof check valve 602 respectively, and the two impact-proof check valves 602 on the other transition branch pipe are defined as the third impact-proof check valve 602 and the fourth impact-proof check valve 602 respectively. When an oil pressure impact occurs in the rodless cavity hydraulic pipeline and the oil pressure instantaneously rises to the upper limit value of the impact pressure set by the impact-proof overflow valve 601, the impact-proof overflow valve 601 opens. At this time, the high-pressure oil in the rodless cavity hydraulic pipeline enters the rod cavity hydraulic pipeline through the first impact-proof check valve 602, the impact-proof overflow valve 601, and the fourth impact-proof check valve 602. On the one hand, the oil pressure in the rodless cavity hydraulic pipeline is reduced to below the upper limit value of the impact pressure, and on the other hand, the oil pressure in the rod cavity hydraulic pipeline and the rod cavity of the mud gun hydraulic cylinder is increased, which offsets the oil pressure in the rodless cavity of the mud gun hydraulic cylinder, greatly reducing the pressure impact and protecting the mud gun hydraulic cylinder better. Similarly, when an oil pressure impact occurs in the rod cavity hydraulic pipeline and the oil pressure instantaneously rises to the upper limit value of the impact pressure set by the impact-proof overflow valve 601, the impact-proof overflow valve 601 opens. At this time, the high-pressure oil in the rod cavity hydraulic pipeline enters the rodless cavity hydraulic pipeline through the second impact-proof check valve 602, the impact-proof overflow valve 601, and the third impact-proof check valve 602. On the one hand, the oil pressure in the rod cavity hydraulic pipeline is reduced to below the upper limit value of the impact pressure, and on the other hand, the oil pressure in the rodless cavity hydraulic pipeline and the rodless cavity of the mud gun hydraulic cylinder is increased, which offsets the oil pressure in the rod cavity of the mud gun hydraulic cylinder, greatly reducing the pressure impact and protecting the mud gun hydraulic cylinder better.

[0086] The rotation action of the mud gun is fast, with a large amplitude and a high pressure in the hydraulic system. When the mud gun impacts the iron notch or returns to the standby position, a huge impact force is often generated, and the oil pressure in the mud gun hydraulic cylinder instantaneously rises greatly. Moreover, the mud gun itself is a cantilever structure. Such a pressure impact will have certain adverse effects on the hydraulic system of the mud gun hydraulic cylinder, the mechanical structure of the mud gun itself, and the base, etc. In this embodiment, by setting the anti-pressure impact module, this pressure impact can be better alleviated, and the action stability, safety, and service life of the mud gun can be improved.

[0087] Among them, the mud gun hydraulic control system provided in this embodiment can be applied to the above-mentioned Embodiments 1 to 3.

[0088] Embodiment 5

[0089] The embodiment of the present invention provides a mud gun hydraulic control system, including a main pressure oil pipe 300, a main return oil pipe 400, and a hydraulic control circuit. A main control reversing valve is provided on the hydraulic control circuit. The pressure port of the main control reversing valve is connected to the main pressure oil pipe 300 through a pressure oil branch pipe, and the oil return port of the main control reversing valve is connected to the main return oil pipe 400 through an oil return branch pipe.

[0090] In one of the embodiments, such asFigures 1-3 The hydraulic control system of the mud gun further includes a safety locking module, which includes a safety control reversing valve 302 and a safety control check valve 301. Among them, the safety control check valve 301 is arranged on the main pressure oil pipe 300. The control oil port of the safety control check valve 301 is connected to one working oil port of the safety control reversing valve 302. The pressure port of the safety control reversing valve 302 is connected to the main pressure oil pipe 300, and the oil return port of the safety control reversing valve 302 is connected to the main oil return pipe 400.

[0091] Among them, the above-mentioned safety control reversing valve 302 is preferably an electromagnetic reversing valve, including but not limited to a two-position four-way reversing valve; the above-mentioned safety control check valve 301 includes but not limited to a cartridge check valve.

[0092] During normal operation, the electromagnet of the safety control reversing valve 302 is de-energized. The safety control reversing valve 302 is in the right valve position. The control oil port X of the safety control check valve 301 is connected to the main oil return pipe 400. The main spool of the safety control check valve 301 is opened, and the pressure oil in the main pressure oil pipe 300 can enter the hydraulic control circuit to complete the relevant actions of the mud gun; when the mud gun does not need to act, or during the maintenance of the mud gun and the front-of-furnace area, the electromagnet of the safety control reversing valve 302 is energized. The safety control reversing valve 302 is in the left valve position. The control oil port X of the safety control check valve 301 is connected to the main pressure oil pipe 300. The main spool of the safety control check valve 301 is closed, and the pressure oil in the main pressure oil pipe 300 cannot enter the hydraulic control circuit, and the mud gun cannot act, thus ensuring safety.

[0093] In one embodiment, as Figures 1-3 a high-pressure filter 303 is provided on the main pressure oil pipe 300, which can ensure the cleanliness of the pressure oil entering the hydraulic control circuit, improve the working reliability of the mud gun and the service life of each component in the hydraulic control system of the mud gun.

[0094] Among them, the hydraulic control system of the mud gun provided in this embodiment can be applied to the above-mentioned Embodiments 1 to 4.

[0095] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydraulic control system for a clay gun, comprising a clay gun hydraulic cylinder and a hydraulic control circuit. The hydraulic control circuit includes a rodless cavity hydraulic pipeline connected to the rodless cavity of the clay gun hydraulic cylinder and a rod cavity hydraulic pipeline connected to the rod cavity of the clay gun hydraulic cylinder, and is characterized in that: The hydraulic control circuit is configured with a pressure shock prevention module. The pressure shock prevention module includes a transition pipeline, and the transition pipeline includes two transition branch pipes and a bridging pipe. After the two transition branch pipes are connected in parallel, they are respectively connected to the rodless cavity hydraulic pipeline and the rod cavity hydraulic pipeline through a transition main pipe. Both ends of the bridging pipe are bypass-connected to the two transition branch pipes respectively, and a shock prevention overflow valve is provided on the bridging pipe. Two shock prevention check valves are provided on each transition branch pipe, and the two shock prevention check valves are respectively arranged on both sides of the bypass connection point of the bridging pipe. The conduction directions of the two shock prevention check valves on each transition branch pipe are opposite, and the conduction directions of the two shock prevention check valves respectively arranged on the two transition branch pipes on each side of the bridging pipe are opposite.

2. The hydraulic control system of the mud gun according to claim 1, wherein: The shock prevention overflow valve adopts a direct-acting overflow valve.

3. The hydraulic control system of the clay gun according to claim 1, characterized in that: The shock prevention check valve adopts a cartridge check valve.

4. The hydraulic control system of the mud gun according to claim 1, wherein: There are two mud gun hydraulic cylinders, namely a rotary hydraulic cylinder and a clay discharging hydraulic cylinder respectively. The hydraulic control circuit correspondingly has two groups, including a rotary hydraulic circuit connected to the rotary hydraulic cylinder and a clay discharging hydraulic circuit connected to the clay discharging hydraulic cylinder; the rotary hydraulic circuit and / or the clay discharging hydraulic circuit is configured with the pressure shock prevention module.

5. The hydraulic control system of the mud gun according to claim 4, characterized in that: The rotary hydraulic circuit includes an automatic control rotary hydraulic circuit and a manual control rotary hydraulic circuit, which are connected in parallel and connected to the rotary hydraulic cylinder; the automatic control rotary hydraulic circuit and / or the manual control rotary hydraulic circuit is configured with the pressure shock prevention module.

6. The hydraulic control system of the mud gun according to claim 4, characterized in that: The clay discharging hydraulic circuit includes an automatic control clay discharging hydraulic circuit and a manual control clay discharging hydraulic circuit, which are connected in parallel and connected to the clay discharging hydraulic cylinder; the automatic control clay discharging hydraulic circuit and / or the manual control clay discharging hydraulic circuit is configured with the pressure shock prevention module.

7. The hydraulic control system of the mud gun according to claim 1, characterized in that: The hydraulic control circuit further includes a main control reversing valve. The pressure port of the main control reversing valve is connected to the main pressure oil pipe through a pressure oil branch pipe, the oil return port of the main control reversing valve is connected to the main oil return pipe through an oil return branch pipe, and the rodless cavity hydraulic pipeline and the rod cavity hydraulic pipeline are respectively connected to the two working oil ports of the main control reversing valve.

8. The hydraulic control system of the mud gun according to claim 7, characterized in that: The main control reversing valve adopts an electro-hydraulic proportional valve.

9. A method for operating a mud gun, characterized in that, Implemented based on the mud gun hydraulic control system described in claim 4; Wherein, the rotary hydraulic cylinder is driven to act through the rotary hydraulic circuit, so that the mud gun advances to the clay discharging position or retreats to the standby position; The clay discharging hydraulic cylinder is driven to act through the clay discharging hydraulic circuit, so that the piston rod of the clay discharging hydraulic cylinder extends to discharge clay or retracts for loading clay.

10. The mud gun operation method according to claim 9, characterized in that, In the pressure shock prevention module, an upper limit value of the shock pressure is set for the shock prevention overflow valve to meet the pressure shock prevention requirements of the corresponding mud gun hydraulic cylinder.

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