Mud gun hydraulic control system capable of being manually and automatically operated and mud gun operation method

Abstract

The invention relates to a manually and automatically operated clay gun hydraulic control system which comprises a rotary hydraulic cylinder and a clay ramming hydraulic cylinder, the rotary hydraulic cylinder is provided with a rotary hydraulic loop, the clay ramming hydraulic cylinder is provided with a clay ramming hydraulic loop, and the rotary hydraulic loop comprises an automatic control rotary hydraulic loop and a manual control rotary hydraulic loop. The two are connected in parallel and are connected with a rotary hydraulic cylinder; the mud ramming hydraulic loop comprises an automatic control mud ramming hydraulic loop and a manual control mud ramming hydraulic loop which are connected in parallel and connected with the mud ramming hydraulic cylinder. In addition, the invention further provides a clay gun operation method. In the invention, the rotary hydraulic cylinder is provided with an automatic control rotary hydraulic loop and a manual control rotary hydraulic loop, and the mud ramming hydraulic cylinder is provided with an automatic control mud ramming hydraulic loop and a manual control mud ramming hydraulic loop, so that manual operation and automatic operation of the mud gun can be realized, and the personal health and safety of operators are guaranteed; and the automatic hydraulic loop and the manual hydraulic loop can be standby for each other, so that the reliability and the safety of mud gun operation are improved.

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 that can be manually and automatically operated and a mud gun operation method. Background Art

[0002] In the field of blast furnace ironmaking, after the blast furnace taps molten iron, a mud gun needs to be used to hold the taphole, and then gun mud is injected 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 swing 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 gushing during mud 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 process and avoid burning out the gun nozzle. During the mud injection process, the mud injection volume should also be observed in real time to ensure that the mud injection volume is appropriate, avoiding the danger of molten iron gushing due to insufficient mud injection and avoiding waste caused by excessive mud injection and difficulties in opening the taphole next time. The traditional operation of the mud gun is manual, and it is only controlled by a hydraulic circuit, which is simple and reliable. However, due to the harsh environment in front of the furnace, high temperature, much dust and danger, it affects the physical health and safety of operating personnel. Summary of the Invention

[0003] The present invention relates to a hydraulic control system for a mud gun that can be manually and automatically operated, which can at least solve some defects of the prior art.

[0004] The present invention relates to a hydraulic control system for a mud gun that can be manually and automatically operated, including a swing hydraulic cylinder and a mud injection hydraulic cylinder. The swing hydraulic cylinder is configured with a swing hydraulic circuit, and the mud injection hydraulic cylinder is configured with a mud injection hydraulic circuit.

[0005] The swing hydraulic circuit includes an automatic control swing hydraulic circuit and a manual control swing hydraulic circuit, which are connected in parallel and connected to the swing hydraulic cylinder.

[0006] The mud injection hydraulic circuit includes an automatic control mud injection hydraulic circuit and a manual control mud injection hydraulic circuit, which are connected in parallel and connected to the mud injection hydraulic cylinder.

[0007] As one of the embodiments, both the automatic control swing hydraulic circuit and the manual control swing hydraulic circuit include a swing control directional valve, a first swing hydraulic pipeline connected to the rodless cavity of the swing hydraulic cylinder, and a second swing hydraulic pipeline connected to the rod end cavity of the swing hydraulic cylinder. The pressure port of the swing control directional valve is connected with a first pressure oil branch pipe for connecting to the main pressure oil pipe, the oil return port of the swing control directional valve is connected with a first oil return branch pipe for connecting to the main oil return pipe, and the first swing hydraulic pipeline and the second swing hydraulic pipeline are respectively connected to two working oil ports of the swing control directional valve.

[0008] As one of the implementation manners, the rotary control directional valve in the automatic control rotary hydraulic circuit adopts an electro-hydraulic proportional valve.

[0009] As one of the implementation manners, in the manual control rotary hydraulic circuit, a one-way oil return throttle valve and a one-way oil inlet throttle valve are provided on its first rotary hydraulic pipeline for respectively adjusting the speeds of the mud gun retracting and the mud gun advancing.

[0010] As one of the implementation manners, a first hydraulic control check valve is provided on the first rotary hydraulic pipeline. The outlet of the first hydraulic control check valve is the passage port close to the rodless cavity of the rotary hydraulic cylinder, and the control oil port of the first hydraulic control check valve is connected to the second rotary hydraulic pipeline.

[0011] As one of the implementation manners, both the automatic control mud pumping hydraulic circuit and the manual control mud pumping hydraulic circuit include a mud pumping control directional valve, a first mud pumping hydraulic pipeline connected to the rodless cavity of the mud pumping hydraulic cylinder, and a second mud pumping hydraulic pipeline connected to the rod end cavity of the mud pumping hydraulic cylinder. The pressure port of the mud pumping control directional valve is connected with a second pressure oil branch pipe for connecting to the main pressure oil pipe, and the oil return port of the mud pumping control directional valve is connected with a second oil return branch pipe for connecting to the main oil return pipe; the first mud pumping hydraulic pipeline and the second mud pumping hydraulic pipeline are respectively connected to two working oil ports of the mud pumping control directional valve.

[0012] As one of the implementation manners, both the automatic control mud pumping hydraulic circuit and the manual control mud pumping hydraulic circuit are configured with double one-way throttle valves. The first one-way throttle valve group of the double one-way throttle valve is arranged on the first mud pumping hydraulic pipeline, and the second one-way throttle valve group of the double one-way throttle valve is arranged on the second mud pumping hydraulic pipeline.

[0013] As one of the implementation manners, both the automatic control mud pumping hydraulic circuit and the manual control mud pumping hydraulic circuit are configured with double hydraulic control check valves. The two sub-hydraulic control check valves of the double hydraulic control check valve are respectively arranged on the corresponding first mud pumping hydraulic pipeline and the second mud pumping hydraulic pipeline, and the control oil port of each sub-hydraulic control check valve is connected to the other mud pumping hydraulic pipeline.

[0014] As one of the implementation manners, a flow meter is provided on the second mud pumping hydraulic pipeline, and / or a pressure measuring unit is provided on the first mud pumping hydraulic pipeline.

[0015] The present invention also relates to a mud gun operation method, which is implemented based on the above-mentioned mud gun hydraulic control system;

[0016] Wherein, the rotary hydraulic cylinder is driven to act through the automatic control rotary hydraulic circuit or the manual control rotary hydraulic circuit, so that the mud gun advances to the mud pumping position or retracts to the standby position;

[0017] The mud pumping hydraulic cylinder is driven to act through an automatic control mud pumping hydraulic circuit or a manual control mud pumping hydraulic circuit, so that the piston rod of the mud pumping hydraulic cylinder extends to pump mud or retracts for mud loading.

[0018] The present invention has at least the following beneficial effects:

[0019] In the present invention, an automatic control rotation hydraulic circuit and a manual control rotation hydraulic circuit are configured for the rotation hydraulic cylinder, and an automatic control mud pumping hydraulic circuit and a manual control mud pumping hydraulic circuit are configured for the mud pumping hydraulic cylinder, so that manual operation and automatic operation of the mud gun can be realized, ensuring the personal health and safety of operators; the automatic hydraulic circuit and the manual hydraulic circuit can be used as backups for each other, thereby improving the reliability and safety of the mud gun operation. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments 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.

[0021] Figure 1 It is a schematic structural diagram of the mud gun hydraulic control system provided by the embodiment of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the mud gun rotation hydraulic control system provided by the embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the mud gun mud pumping hydraulic control system provided by the embodiment of the present invention. Detailed Embodiments

[0024] 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.

[0025] Embodiment 1

[0026] 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,

[0027] The rotation hydraulic circuit includes a rotation control directional valve 105, a first rotation hydraulic pipeline 103 connected to the rodless chamber of the rotation hydraulic cylinder 100, and a second rotation hydraulic pipeline 104 connected to the rod chamber of the rotation hydraulic cylinder 100.

[0028] The pressure port of the rotation control directional valve 105 is connected to a first pressure oil branch pipe (shown in the figure but 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 but 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.

[0029] Cut-off valves (shown in the figure but not labeled) are provided on the first rotation hydraulic pipeline 103, the second rotation hydraulic pipeline 104, and the first pressure oil branch pipe, and the cut-off valve includes but is not limited to a ball valve.

[0030] In one embodiment, as Figure 2 , a first check valve (shown in the figure but not labeled) is provided on the first oil return branch pipe, including but not limited to a tubular 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.

[0031] In one embodiment, the above rotation hydraulic circuit is an automatic control circuit, and the above rotation control directional valve 105 adopts 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, adopting 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.

[0032] 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, define the bypass connection point of the overflow bypass on the first rotary hydraulic pipeline 103 as the first bypass connection point, and the bypass connection point on the second rotary hydraulic pipeline 104 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;

[0033] Among them, the above sequence valve 106 is preferably a pilot-operated sequence valve, and the above bypass overflow valve 107 is preferably a pilot-operated overflow valve, which is more precise for the control of the rotary hydraulic circuit. The above bypass check valve 108 includes but is not limited to a plate check valve.

[0034] 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 overflow valve 107. The opening pressure of the sequence valve 106 is preferably set to the system pressure. 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. Therefore, the sequence valve 106 does not open, and the side check valve of the sequence valve 106 in this direction is not conductive; while the opening pressure of the bypass overflow valve 107 is set relatively low (much lower than the system pressure). Its control oil port X is connected to the second rotary hydraulic pipeline 104, and at this time, the second rotary hydraulic pipeline 104 is connected to the main return oil pipe 400, and the pressure is low. Therefore, when the piston rod of the rotary hydraulic cylinder 100 extends and the oil pressure between the rod chamber of the rotary hydraulic cylinder 100 and the sequence valve 106 rises to the opening pressure of the bypass overflow valve 107 (at this time, the sequence valve 106 is still closed), the bypass overflow valve 107 opens, and the hydraulic oil in the rod chamber is supplemented to the first rotary hydraulic pipeline 103 through the bypass overflow valve 107 and the bypass check valve 108, supplementing the oil volume for the rotation of the mud gun, which is beneficial to meeting the maximum speed requirement of the mud gun rotation and improving the response speed of the mud gun rotation.

[0035] 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.

[0036] 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.

[0037] When the mud gun moves forward, the rotation control reversing valve 105 is activated (for example, it is in the right valve position), and the pressure oil enters the rodless chamber of the mud gun rotary hydraulic cylinder through the first pressure oil branch pipe, the rotation control reversing valve 105 and the first rotary hydraulic pipeline 103 in sequence, pushing the piston rod to extend, and the mud gun moves forward.

[0038] When the clay gun returns, the rotation control directional valve 105 operates (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 (oil can pass through in this direction) of the sequence valve 106 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 in 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 chamber 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 retracts. At this time, the hydraulic oil in the rodless chamber 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 in 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 chamber 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.

[0039] 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;

[0040] 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;

[0041] 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.

[0042] When the first end of the pressure holding control bypass is bypass-connected to the first pressure holding pipeline, this first end is located between the first end of the first pressure holding pipeline and the second pilot-operated check valve 110.

[0043] When the pressure in the rodless cavity of the rotary hydraulic cylinder 100 drops too quickly, mud leakage may occur, affecting the normal operation of the mud gun and even causing dangerous situations such as molten iron overflowing. By setting up the first pressure-holding pipeline, hydraulic oil can be replenished to the first rotary hydraulic pipeline 103 to improve the pressure stability of the rodless cavity of the rotary hydraulic cylinder 100.

[0044] The above-mentioned pressure-holding reversing valve 111 is preferably an electromagnetic reversing valve for easy automatic control, including but not limited to a two-position four-way electromagnetic reversing valve.

[0045] 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 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 the first pressure measurement unit 120. The mud gun rotary hydraulic control system also includes a central controller, and both the above-mentioned pressure-holding reversing valve 111 and the first pressure measurement unit 120 are 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.

[0046] Further preferably, as Figure 2 , a second one-way valve 112 is also provided on the first pressure-holding pipeline. The second one-way valve 112 is located between the second hydraulic control one-way valve 110 and the second end of the first pressure-holding pipeline, and the conduction direction of the second one-way valve 112 is from the second hydraulic control one-way valve 110 to the second end of the first pressure-holding pipeline. The second one-way 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 control one-way valve 110 and cause malfunction.

[0047] 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:

[0048] When the mud gun is against the iron mouth, if the pressure in the rodless chamber of the rotating hydraulic cylinder 100 drops rapidly, the electromagnet of the two-position four-way solenoid reversing valve will be energized, and the two-position four-way solenoid reversing valve will be in the left valve position. The pressure oil passes through the first pressure oil branch pipe, the pressure maintaining control bypass, the P port and the B port of the pressure maintaining reversing valve 111, and acts on the control oil port X of the second hydraulically controlled one-way valve 110. At this time, the main valve core of the second hydraulically controlled one-way valve 110 is opened, and the pressure oil is further replenished to the first rotating hydraulic pipeline 103 through the second hydraulically controlled one-way valve 110 to ensure that the pressure in the rodless chamber of the rotating hydraulic cylinder 100 does not drop, so that the mud gun can work normally. If the rodless chamber of the rotary hydraulic cylinder 100 does not need to maintain pressure, the electromagnet of the two-position four-way solenoid reversing valve loses power, and the two-position four-way solenoid reversing valve is in the right valve position. At this time, the control port X of the second hydraulically controlled one-way valve 110 is connected to the main oil drain pipe 500. The second hydraulically controlled one-way valve 110 is not opened, and the pressure oil will not be replenished into the first rotary hydraulic pipeline 103.

[0049] In one embodiment, the rotary hydraulic circuit further includes a second pressure-maintaining line (illustrated, not labeled). An accumulator 113 is provided at one end of the second pressure-maintaining line for storing pressurized oil. The outlet of the second pressure-maintaining line communicates with the rodless chamber of the rotary hydraulic cylinder 100. A safety valve 114 is provided on the second pressure-maintaining line, located between the accumulator 113 and the outlet of the second pressure-maintaining line, for controlling the on / off flow of the second pressure-maintaining line. The safety valve 114 may include, but is not limited to, a ball valve.

[0050] Further, if Figure 2 The second pressure-maintaining pipeline is connected to an oil drain bypass, on which an unloading ball valve 115 is installed. This oil drain bypass can be connected to the main oil return pipe 400. Furthermore, an overflow branch can be connected to the second pressure-maintaining pipeline. This overflow branch can also be connected to the oil drain bypass, with its two ends located on either side of the unloading ball valve 115. A branch overflow valve 116 is installed on the overflow branch. When the accumulator 113 needs to be unloaded for maintenance or the pressure in the accumulator 113 exceeds the safety pressure set by the branch overflow valve 116, the pressurized oil in the accumulator 113 can be discharged to the main oil return pipe 400. The safety valve 114, the unloading ball valve 115, and the branch overflow valve 116 can be combined into a safety valve 114 group.

[0051] The second pressure-maintaining pipeline can be connected to the first rotary hydraulic pipeline 103; in another embodiment, Figure 2 When both a first pressure-maintaining line and a second pressure-maintaining line are provided, the second pressure-maintaining line can also be connected to the first pressure-maintaining line. When oil flows into the first rotary hydraulic line 103 / the first pressure-maintaining line, the safety valve 114 is opened, and pressurized oil can also be replenished into the accumulator 113.

[0052] Preferably, taking the example that the second pressure-holding pipeline is connected in parallel to the first pressure-holding pipeline, as Figure 2 , a third one-way valve 117 is further provided on the first pressure-holding pipeline. The conducting 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 pressurized 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 pressurized oil for pressure-holding.

[0053] The pressurized 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 pressurized oil due to power failure, the pressurized 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 against the taphole 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 pressurized oil stored in the accumulator 113 is used to meet the pressure-holding requirement, so it is more energy-saving.

[0054] Such as Figure 2 , a second pressure measurement unit (shown in the figure but not labeled) can be provided on the second rotary hydraulic pipeline 104. The structure of the second pressure measurement unit can refer to the structure of the first pressure measurement unit 120, which will not be elaborated here.

[0055] 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.

[0056] Such 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 real-time flow regulation, 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 retracting speed and advancing speed of the mud gun. 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.

[0057] Among them, since the standby position elevation is relatively low in the swing trajectory of the clay gun, in order 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 cavity of the swing 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 adjusted through the throttle spool of the one-way oil return throttle valve 118, thereby adjusting the retracting speed of the clay gun, and establishing a back pressure 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 usually fast, the flow rate and pressure of the hydraulic oil in the first swing hydraulic pipeline 103 are high. In order to avoid unnecessary energy consumption and heat generation caused by a high back pressure, an inlet throttle speed regulation is adopted. Specifically, when the clay gun advances, the pressure oil enters the rodless cavity of the swing 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 adjusted through the throttle spool of the one-way inlet throttle valve 119, thereby adjusting 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.

[0058] As Figure 1 and Figure 2 , in one embodiment, the swing hydraulic control system of the clay gun includes an automatic control swing hydraulic circuit 101 and a manual control swing hydraulic circuit 102. The two are connected in parallel and connected to the swing hydraulic cylinder 100. The automatic control swing hydraulic circuit 101 and the manual control swing hydraulic circuit 102 can be used as spares for each other, improving the reliability and safety of the swing operation of the clay gun.

[0059] Embodiment 2

[0060] As Figure 1 and Figure 3 , an embodiment of the present invention provides a clay feeding hydraulic control system for a clay gun, including a clay feeding hydraulic cylinder 200 and a clay feeding hydraulic circuit.

[0061] The clay feeding hydraulic circuit includes a clay feeding control reversing valve 203, a first clay feeding hydraulic pipeline 208 connected to the rodless cavity of the clay feeding hydraulic cylinder 200, and a second clay feeding hydraulic pipeline 209 connected to the rod end cavity of the clay feeding hydraulic cylinder 200.

[0062] The pressure port of the clay feeding control reversing valve 203 is connected to a second 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 clay feeding control reversing valve 203 is connected to a second oil return branch pipe (shown in the figure, not labeled) for connecting to the main oil return pipe 400; the first clay feeding hydraulic pipeline 208 and the second clay feeding hydraulic pipeline 209 are respectively connected to two working oil ports of the clay feeding control reversing valve 203.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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 and avoid the situation that the mud gun retracts into the mud ramming cavity 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.

[0069] Taking the electro-hydraulic reversing valve as the mud feeding control reversing valve 203 as an example, the working process of the above-mentioned hydraulic control system for the mud gun mud feeding is roughly described as follows:

[0070] 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 feeding hydraulic pipeline 208 as an example, when starting to feed mud, the electromagnet of the mud feeding control reversing valve 203 is energized, and the mud feeding control reversing 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 feeding control reversing 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 (that is, the bypass one-way valve of the first one-way throttle valve group) and enters the rodless cavity of the mud feeding hydraulic cylinder 200, pushing the piston rod to extend and start feeding mud; at this time, the hydraulic oil in the rod cavity of the mud feeding 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 feeding hydraulic pipeline 208, so this right one-way valve is open), the B port and the T port of the mud feeding control reversing 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 right side of the double one-way throttle valve 204 (that is, the opening of the throttle valve main spool of the second one-way throttle valve group), the oil return flow rate of mud feeding can be adjusted, and thus the mud feeding speed can be adjusted.

[0071] After the clay gun retracts to the standby position, if mud filling is required, the mud pumping hydraulic cylinder 200 needs to be retracted, causing the electromagnet of the mud pumping control directional valve 203 to be 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 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, pushing 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 main 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 this left check valve is open), the A port and 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 degree of the main spool on the left side of the double one-way throttle valve 204 (i.e., the opening degree of the throttle main spool of the first one-way throttle valve group), the oil return flow rate of the retraction of the mud pumping hydraulic cylinder 200 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 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.

[0072] As Figure 1 and Figure 3 In one embodiment, the mud pumping hydraulic control system of the clay 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 clay gun.

[0073] 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 flow rate of the hydraulic oil 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 clay 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 gushing out 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.

[0074] 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.

[0075] 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.

[0076] 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 .

[0077] Example 3

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] Example 4

[0083] An embodiment of the present invention provides 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.

[0084] 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 in the figure, not labeled). The transition pipeline includes two transition branch pipes (shown in the figure, not labeled) and a bridge connection pipe (shown in the figure, not labeled). 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 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).

[0085] 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 upper limit value of impact pressure; the above shock prevention check valve 602 can adopt a cartridge check valve.

[0086] In the direction from the rodless cavity hydraulic pipeline to the rod cavity hydraulic pipeline, 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 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.

[0087] 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.

[0088] Among them, the mud gun hydraulic control system provided in this embodiment can be applied to the above-mentioned Embodiments 1 to 3.

[0089] Embodiment 5

[0090] An 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.

[0091] In one of the embodiments, such asFigures 1 - 3 , the hydraulic control system of the clay 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 a 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.

[0092] 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.

[0093] 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 clay gun; when the clay gun does not need to act, or when the clay gun and the front-of-furnace area are under maintenance, 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, the pressure oil in the main pressure oil pipe 300 cannot enter the hydraulic control circuit, and the clay gun cannot act, thereby ensuring safety.

[0094] In one of the embodiments, such 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 clay gun and the service life of each component in the hydraulic control system of the clay gun.

[0095] Among them, the hydraulic control system of the clay gun provided in this embodiment can be applied to the above-mentioned Embodiments 1 to 4.

[0096] 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 with manual and automatic operation functions, comprising a rotary hydraulic cylinder and a clay ramming hydraulic cylinder. The rotary hydraulic cylinder is configured with a rotary hydraulic circuit, and the clay ramming hydraulic cylinder is configured with a clay ramming hydraulic circuit. It is 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 clay ramming hydraulic circuit includes an automatic control clay ramming hydraulic circuit and a manual control clay ramming hydraulic circuit, which are connected in parallel and connected to the clay ramming hydraulic cylinder.

2. The hydraulic control system of the clay gun according to claim 1, characterized in that: Both the automatic control rotary hydraulic circuit and the manual control rotary hydraulic circuit include a rotary control directional valve, a first rotary hydraulic pipeline connected to the rodless cavity of the rotary hydraulic cylinder, and a second rotary hydraulic pipeline connected to the rod end cavity of the rotary hydraulic cylinder. The pressure port of the rotary control directional valve is connected with a first pressure oil branch pipe for connecting to the main pressure oil pipe, and the oil return port of the rotary control directional valve is connected with a first oil return branch pipe for connecting to the main oil return pipe. The first rotary hydraulic pipeline and the second rotary hydraulic pipeline are respectively connected to the two working oil ports of the rotary control directional valve.

3. The hydraulic control system of the mud gun according to claim 1, characterized in that: The rotary control directional valve in the automatic control rotary hydraulic circuit adopts an electro-hydraulic proportional valve.

4. The hydraulic control system of the clay gun according to claim 1, characterized in that: In the manual control rotary hydraulic circuit, a one-way oil return throttle valve and a one-way oil inlet throttle valve are provided on its first rotary hydraulic pipeline for respectively adjusting the retracting speed and advancing speed of the clay gun.

5. The hydraulic control system of the clay gun according to claim 1, wherein: A first hydraulic control check valve is provided on the first rotary hydraulic pipeline. The outlet of the first hydraulic control check valve is the passage port close to the rodless cavity of the rotary hydraulic cylinder, and the control oil port of the first hydraulic control check valve is connected to the second rotary hydraulic pipeline.

6. The hydraulic control system of the clay gun according to claim 1, characterized in that: Both the automatic control clay ramming hydraulic circuit and the manual control clay ramming hydraulic circuit include a clay ramming control directional valve, a first clay ramming hydraulic pipeline connected to the rodless cavity of the clay ramming hydraulic cylinder, and a second clay ramming hydraulic pipeline connected to the rod end cavity of the clay ramming hydraulic cylinder. The pressure port of the clay ramming control directional valve is connected with a second pressure oil branch pipe for connecting to the main pressure oil pipe, and the oil return port of the clay ramming control directional valve is connected with a second oil return branch pipe for connecting to the main oil return pipe; the first clay ramming hydraulic pipeline and the second clay ramming hydraulic pipeline are respectively connected to the two working oil ports of the clay ramming control directional valve.

7. The hydraulic control system for a mud gun according to claim 6, characterized in that: Both the automatic control clay ramming hydraulic circuit and the manual control clay ramming hydraulic circuit are configured with double one-way throttle valves. The first one-way throttle valve group of the double one-way throttle valve is arranged on the first clay ramming hydraulic pipeline, and the second one-way throttle valve group of the double one-way throttle valve is arranged on the second clay ramming hydraulic pipeline.

8. The mud gun hydraulic control system according to claim 6, characterized in that: Both the automatic control clay ramming hydraulic circuit and the manual control clay ramming hydraulic circuit are configured with double hydraulic control check valves. The two sub-hydraulic control check valves of the double hydraulic control check valve are respectively arranged on the corresponding first clay ramming hydraulic pipeline and the second clay ramming hydraulic pipeline, and the control oil port of each sub-hydraulic control check valve is connected to the other clay ramming hydraulic pipeline.

9. The hydraulic control system of the mud gun according to claim 6, characterized in that: A flow meter is provided on the second clay ramming hydraulic pipeline, and / or a pressure measuring unit is provided on the first clay ramming hydraulic pipeline.

10. A method for operating a mud gun, characterized in that, Implemented based on the clay gun hydraulic control system according to any one of claims 1 to 9; Among them, the rotary hydraulic cylinder is driven to act by automatically controlling the rotary hydraulic circuit or manually controlling the rotary hydraulic circuit, so that the mud gun advances to the mud pumping position or retracts to the standby position; The mud pumping hydraulic cylinder is driven to act by automatically controlling the mud pumping hydraulic circuit or manually controlling the mud pumping hydraulic circuit, so that the piston rod of the mud pumping hydraulic cylinder extends to pump mud or retracts to load mud.

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