Hydraulic control system of slurry shield stone crusher and slurry balance shield machine with hydraulic control system

Abstract

The invention discloses a slurry shield stone crusher hydraulic control system and a slurry balance shield machine with the same. The slurry shield stone crusher hydraulic control system comprises a left clamping plate oil cylinder, a right clamping plate oil cylinder, a left oil cylinder stroke detector, a right oil cylinder stroke detector, a left oil cylinder control loop and a right oil cylinder control loop. The left clamping plate oil cylinder and the right clamping plate oil cylinder stretch out and retract back at the same time in the stone breaking mode, stretch out and reverse in the full stroke under pressure control and conduct non-full-stroke retreating and reversing under stroke limitation. The left clamping plate oil cylinder and the right clamping plate oil cylinder act oppositely at the same time in the cleaning mode, and the left clamping plate oil cylinder and the right clamping plate oil cylinder conduct non-full-stroke extending and retracting under stroke limitation and reverse after extending and retracting in place. According to the system, a stroke control method is added and combined with a pressure control method to control reversing of the oil cylinder, so that reversing impact of the hydraulic system of the stone crusher is reduced to the maximum extent, and damage to a hydraulic pipeline of the hydraulic system in the air cushion bin is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slurry shield stone crusher, in particular, to a slurry shield stone crusher hydraulic control system. Furthermore, the present application also relates to a slurry balance shield machine comprising the slurry shield stone crusher hydraulic control system. BACKGROUND

[0002] In China, many tunnels need to be built by slurry balance shield machines for subway, highway, railway and water diversion projects. When the slurry balance shield machine is excavating, the suction port may be blocked by large stones or piles of particles, which causes poor suction of the slurry pump and ultimately reduces the excavation efficiency. Therefore, most slurry balance shield machines are equipped with a hydraulic-driven stone crusher mechanism in the air cushion chamber. When a large stone blocks the suction port, the stone crusher mechanism can be controlled to crush it. When a large amount of material blocks the suction port, the stone crusher mechanism can be controlled to clean it.

[0003] Part of the hydraulic system of the stone crusher is in the air cushion chamber. The internal environment of the air cushion chamber is harsh, and the stone crusher system is in a long-term high-pressure and high-frequency commutation working state. The existing stone crusher hydraulic system adopts pressure control commutation in both cleaning and crushing modes, and the stone crusher cylinder will extend and retract throughout the stroke. When the cylinder is fully extended or retracted, the internal pressure of the stone crusher cylinder is high. When commutation is performed again, the impact is large. Due to the high-pressure and high-frequency commutation impact, the hydraulic pipe of the hydraulic system in the air cushion chamber is easily damaged and difficult to repair. Moreover, if you want to improve the working frequency of the stone crusher, you can only increase the displacement of the stone crusher hydraulic pump, which is costly.

[0004] The existing patent CN111396408A discloses a slurry shield crusher stroke control device and method. During operation, the stroke control causes the stone crusher cylinder to reach the pump pressure every time it moves, so the commutation impact is also large. SUMMARY

[0005] The present application provides a slurry shield stone crusher hydraulic control system and a slurry balance shield machine having the same, to solve the technical problems of the existing stone crusher hydraulic system, i.e., when the cylinder is fully extended or retracted, the internal pressure of the stone crusher cylinder is high, the impact is large when commutation is performed again, the hydraulic pipe of the hydraulic system in the air cushion chamber is easily damaged and difficult to repair, and the displacement of the stone crusher hydraulic pump must be increased to improve the working frequency of the stone crusher, which is costly.

[0006] The technical scheme adopted by the present application is as follows:

[0007] The hydraulic control system of the sludge shield rock breaker comprises a left clamp plate oil cylinder and a right clamp plate oil cylinder connected with a left clamp plate and a right clamp plate of the rock breaker respectively, a left oil cylinder stroke detector arranged in the left clamp plate oil cylinder and a right oil cylinder stroke detector arranged in the right clamp plate oil cylinder, a left oil cylinder control circuit connected with the left clamp plate oil cylinder and a right oil cylinder control circuit connected with the right clamp plate oil cylinder, and an upper computer connected with the left oil cylinder stroke detector, the right oil cylinder stroke detector, the left oil cylinder control circuit and the right oil cylinder control circuit; the left clamp plate oil cylinder and the right clamp plate oil cylinder are simultaneously extended and retracted under the action of the left oil cylinder control circuit and the right oil cylinder control circuit respectively in the rock breaking mode, and the left clamp plate oil cylinder and the right clamp plate oil cylinder are full stroke extended and reversed after being extended to the position under the pressure control of the rodless cavity respectively, and the left clamp plate oil cylinder and the right clamp plate oil cylinder are non full stroke retracted and reversed after being retracted to the position under the stroke limitation feedback of the left oil cylinder stroke detector and the right oil cylinder stroke detector respectively; the left clamp plate oil cylinder and the right clamp plate oil cylinder are simultaneously and oppositely operated under the action of the left oil cylinder control circuit and the right oil cylinder control circuit respectively in the cleaning mode, and the left clamp plate oil cylinder and the right clamp plate oil cylinder are non full stroke extended and retracted and reversed after being extended and retracted to the position under the stroke limitation feedback of the left oil cylinder stroke detector and the right oil cylinder stroke detector respectively.

[0008] Further, the left oil cylinder control circuit comprises a first pressure detector and a second pressure detector for detecting the pressure in the rodless cavity and the rod cavity respectively, the right oil cylinder control circuit comprises a third pressure detector and a fourth pressure detector for detecting the pressure in the rodless cavity and the rod cavity respectively, and the first pressure detector, the second pressure detector, the third pressure detector and the fourth pressure detector are connected with the upper computer; the left clamp plate oil cylinder and the right clamp plate oil cylinder are full stroke extended and reversed after being extended to the position under the pressure limitation feedback of the first pressure detector and the third pressure detector respectively in the rock breaking mode.

[0009] Further, when the left oil cylinder stroke detector detects deviation, the left clamp plate oil cylinder can be full stroke retracted and reversed after being retracted to the position under the pressure limitation feedback of the second pressure detector in the rock breaking mode; when the right oil cylinder stroke detector detects deviation, the right clamp plate oil cylinder can be full stroke retracted and reversed after being retracted to the position under the pressure limitation feedback of the fourth pressure detector in the rock breaking mode.

[0010] Further, when the left oil cylinder stroke detector detects a deviation, the left clamp oil cylinder can also extend to full stroke and reverse after reaching the position under the pressure limit feedback by the first pressure detector in the cleaning mode, or retract to full stroke and reverse after reaching the position under the pressure limit feedback by the second pressure detector; when the right oil cylinder stroke detector detects a deviation, the right clamp oil cylinder can also retract to full stroke and reverse after reaching the position under the pressure limit feedback by the fourth pressure detector in the cleaning mode, or extend to full stroke and reverse after reaching the position under the pressure limit feedback by the third pressure detector.

[0011] Further, the left and right clamp oil cylinders also retract to full stroke under the pressure limit feedback by the second and fourth pressure detectors respectively after each set of extension and retraction, while the host computer controls the left and right oil cylinder stroke detectors to zero.

[0012] Further, the left oil cylinder control circuit further comprises a first oil tank, a first driving pump set and a first reversing valve, the oil inlet side of the first driving pump set is communicated with the first oil tank, the oil outlet side of the first driving pump set is communicated with the P position of the first reversing valve, the A position of the first reversing valve is communicated with the rodless cavity of the left clamp oil cylinder, the rod cavity of the left clamp oil cylinder is communicated with the B position of the first reversing valve, the T position of the first reversing valve is communicated with the first oil tank, the first pressure detector is connected between the first reversing valve and the rodless cavity of the left clamp oil cylinder, and the second pressure detector is connected between the first reversing valve and the rod cavity of the left clamp oil cylinder; the right oil cylinder control circuit further comprises a second oil tank, a second driving pump set and a second reversing valve, the oil inlet side of the second driving pump set is communicated with the second oil tank, the oil outlet side of the second driving pump set is communicated with the P position of the second reversing valve, the A position of the second reversing valve is communicated with the rodless cavity of the right clamp oil cylinder, the rod cavity of the right clamp oil cylinder is communicated with the B position of the second reversing valve, the T position of the second reversing valve is communicated with the second oil tank, the third pressure detector is connected between the second reversing valve and the rodless cavity of the right clamp oil cylinder, and the fourth pressure detector is connected between the second reversing valve and the rod cavity of the right clamp oil cylinder.

[0013] Further, the first driving pump set comprises a first motor and a first hydraulic pump, and a first coupling connected between the first motor and the first hydraulic pump; the second driving pump set comprises a second motor and a second hydraulic pump, and a second coupling connected between the second motor and the second hydraulic pump.

[0014] Further, the left oil cylinder control circuit further comprises a first one-way valve connected between the first driving pump set and the first reversing valve, for preventing the hydraulic oil in the left clamp oil cylinder from flowing back to the first hydraulic pump; the right oil cylinder control circuit further comprises a second one-way valve connected between the second driving pump set and the second reversing valve, for preventing the hydraulic oil in the right clamp oil cylinder from flowing back to the second hydraulic pump.

[0015] Further, the left oil cylinder control circuit further comprises a first safety valve branch connected between the first driving pump group and the first one-way valve, and an oil outlet end of the first safety valve branch is communicated with the first oil tank; the right oil cylinder control circuit further comprises a second safety valve branch connected between the second driving pump group and the second one-way valve, and an oil outlet end of the second safety valve branch is communicated with the second oil tank.

[0016] According to another aspect of the present application, there is also provided a slurry balance shield tunneling machine comprising the slurry shield tunneling machine hydraulic control system according to any one of the above.

[0017] The present application has the following beneficial effects:

[0018] The slurry shield tunneling machine hydraulic control system of the present application increases the stroke control method to jointly control the reversing of the left and right clamping plate oil cylinders with the pressure control method, and in the rock breaking mode, the left and right clamping plate oil cylinders are extended, and the pressure control full stroke extension and reversing after the extension to the position are adopted, so as to ensure the rock breaking effect in the air cushion bin, and in the rock breaking mode, the left and right clamping plate oil cylinders are retracted, and in the cleaning mode, the left and right clamping plate oil cylinders are retracted, and the stroke control is adopted, so that the left and right clamping plate oil cylinders can be reversed without extending to the position, thereby reducing the reversing impact of the rock breaking machine hydraulic system to the greatest extent, reducing the damage of the hydraulic pipeline of the hydraulic system in the air cushion bin; on the other hand, in the slurry shield tunneling machine hydraulic control system of the present application, the retraction reversing stroke value of the left and right clamping plate oil cylinders in the rock breaking mode and the extension or retraction reversing stroke value of the left and right clamping plate oil cylinders in the cleaning mode are set by the upper computer, so that the rock breaking machine oil cylinder (including the left and right clamping plate oil cylinders) is moved to the specified stroke for reversing, so that the working frequency of the rock breaking machine can be improved without increasing the displacement of the hydraulic pump, thereby saving the cost and improving the working efficiency.

[0019] In addition to the objects, features, and advantages described above, the present application has other objects, features, and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate embodiments of the application and aid in explaining the application. In the drawings:

[0021] Figure 1 is a slurry shield tunneling machine hydraulic control system schematic diagram of the preferred embodiment of the present application.

[0022] LEGEND:

[0023] 1, first motor; 2, first coupling; 3, first hydraulic pump; 4, first safety valve; 5, first check valve; 6, first reversing valve; 7, first pressure detector; 8, second pressure detector; 9, left clamp plate oil cylinder; 10, left oil cylinder stroke detector;

[0024] 101, second motor; 102, second coupling; 103, second hydraulic pump; 104, second safety valve; 105, second check valve; 106, second reversing valve; 107, third pressure detector; 108, fourth pressure detector; 109, right clamp plate oil cylinder; 110, right oil cylinder stroke detector. DETAILED DESCRIPTION

[0025] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the following.

[0026] REFERENCE Figure 1 The preferred embodiment of the present application provides a hydraulic control system for a slurry shield rock breaker, comprising: a left clamp plate oil cylinder 9 and a right clamp plate oil cylinder 109 connected to left and right clamp plates of a rock breaker respectively, a left oil cylinder stroke detector 10 arranged in the left clamp plate oil cylinder 9 and a right oil cylinder stroke detector 110 arranged in the right clamp plate oil cylinder 109, a left oil cylinder control circuit connected to the left clamp plate oil cylinder 9 and a right oil cylinder control circuit connected to the right clamp plate oil cylinder 109 respectively, and a host computer connected to the left oil cylinder stroke detector 10, the right oil cylinder stroke detector 110, the left oil cylinder control circuit and the right oil cylinder control circuit. The left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 are simultaneously extended and retracted under the action of the connected left oil cylinder control circuit and right oil cylinder control circuit respectively in the rock breaking mode, and the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 are also extended to the full stroke and reversed after being extended to the position under the control of the pressure in the rodless cavity respectively, and the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 are also retreated to the position and reversed after being retreated to the position under the stroke limit feedback of the built-in left oil cylinder stroke detector 10 and right oil cylinder stroke detector 110 respectively. The left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 are simultaneously and oppositely operated under the action of the connected left oil cylinder control circuit and right oil cylinder control circuit respectively in the cleaning mode, and the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 are also extended and retreated to the position and reversed after being extended and retreated to the position under the stroke limit feedback of the built-in left oil cylinder stroke detector 10 and right oil cylinder stroke detector 110 respectively.

[0027] The working mode of the hydraulic control system for a slurry shield rock breaker of the present application is as follows:

[0028] Stone breaking mode: the left clamp cylinder 9 and the right clamp cylinder 109 are simultaneously extended and simultaneously retracted under the action of the left cylinder control circuit and the right cylinder control circuit connected thereto; when simultaneously extended, the left clamp cylinder 9 and the right clamp cylinder 109 are respectively fully extended under the pressure control of the respective rodless cavities, so as to break the stones in the air cushion warehouse, and when the pressure in the rodless cavities of the left clamp cylinder 9 and the right clamp cylinder 109 reaches the program setting value, it is considered that the left clamp cylinder 9 and the right clamp cylinder 109 are fully extended in place, at which time the left clamp cylinder 9 and the right clamp cylinder 109 are simultaneously retracted for resetting, so as to prepare for the next breaking action; because the left clamp cylinder 9 and the right clamp cylinder 109 do not break when they are retracted for resetting, they do not need to be fully retracted in place, and when the left clamp cylinder 9 and the right clamp cylinder 109 are retracted to the preset stroke, that is, the stroke value fed back by the left cylinder stroke detector 10 and the right cylinder stroke detector 110 is the preset retraction stroke, the left clamp cylinder 9 and the right clamp cylinder 109 are fully extended again for the next breaking work.

[0029] Sweeping mode: sweeping to the right: the left clamp cylinder 9 is extended and the right clamp cylinder 109 is retracted (or sweeping to the left: the left clamp cylinder 9 is retracted and the right clamp cylinder 109 is extended); because sweeping is to disturb the slag stones of the suction port to prevent the accumulation of slag stones, the left clamp cylinder 9 and the right clamp cylinder 109 do not need to be fully extended and retracted in place. When entering the sweeping mode, ① the left clamp cylinder 9 is extended and the right clamp cylinder 109 is retracted, when the left clamp cylinder 9 is extended to the set stroke, the extension is stopped, and when the right clamp cylinder 109 is retracted to the set stroke, the retraction is stopped, the program controls the stone breaker to sweep to the left; ② the left clamp cylinder 9 is retracted and the right clamp cylinder 109 is extended, when the left clamp cylinder 9 is retracted to the set stroke, the retraction is stopped, and when the right clamp cylinder 109 is extended to the set stroke, the extension is stopped, the program controls the stone breaker to sweep to the right.

[0030] The hydraulic control system of the slurry shield rock breaker of the application increases the stroke control method to jointly control the reversing of the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 with the pressure control method, and in the rock breaking mode, when the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 are extended, the pressure control full stroke extension and extension to the position reversing are adopted to ensure the slag breaking effect in the air cushion bin, and in the rock breaking mode, when the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 are retracted, and in the cleaning mode, the stroke control is adopted for the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109, so that the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 can be reversed without extending and retracting to the position, thereby reducing the reversing impact of the hydraulic system of the rock breaker to the greatest extent and reducing the damage of the hydraulic pipeline of the hydraulic system in the air cushion bin; on the other hand, in the hydraulic control system of the slurry shield rock breaker of the application, the upper computer is used to set the retracting reversing stroke value of the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 in the rock breaking mode and the extending or retracting reversing stroke value in the cleaning mode, so that the rock breaker cylinder (including the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109) is reversed when moving to the specified stroke, so that the working frequency of the rock breaker can be improved without increasing the displacement of the hydraulic pump, thereby saving the cost and improving the working efficiency.

[0031] Optionally, as shown in Figure 1 the left oil cylinder control circuit includes a first pressure detector 7 and a second pressure detector 8 for detecting the pressure in the rodless cavity and the rod cavity, respectively, and the right oil cylinder control circuit includes a third pressure detector 107 and a fourth pressure detector 108 for detecting the pressure in the rodless cavity and the rod cavity, respectively, and the first pressure detector 7, the second pressure detector 8, the third pressure detector 107 and the fourth pressure detector 108 are connected to the upper computer. In the rock breaking mode, the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 are respectively extended to the full stroke and reversed after extending to the position under the pressure limit feedback by the first pressure detector 7 and the third pressure detector 107; that is, when the first pressure detector 7 detects that the pressure value of the rodless cavity of the left clamp plate oil cylinder 9 reaches the program setting value, and the third pressure detector 107 also detects that the pressure value of the rodless cavity of the right clamp plate oil cylinder 109 reaches the program setting value, it is considered that the two are extended to the full stroke, at this time, the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 are retracted at the same time to reset, in order to prepare for the next extension breaking action.

[0032] Preferably, in actual work, if the stroke detection of the left oil cylinder stroke detector 10 is deviated, the left clamp oil cylinder 9 has been retracted to the position, but the program detects that the stroke has not been retracted to the set stroke, at this time, the host computer will control the left clamp oil cylinder 9 to continue to retract, but the left clamp oil cylinder 9 has been retracted to the position and cannot continue to retract in fact, and finally the program will be in the state of retracting the left clamp oil cylinder 9, therefore, in the preferred embodiment of the present application, the pressure control is connected in parallel on the basis of the stroke control, when the stroke detection is deviated and the oil cylinder is retracted to the position, the pressure will be blocked to reach the set pressure of the program, at this time, it is considered that the oil cylinder has been retracted to the position, and the extension is reversed, that is, in the preferred embodiment of the present application, when the left oil cylinder stroke detector 10 detects the deviation in the rock mode, the left clamp oil cylinder 9 can also be controlled to retreat to the full stroke and reverse after retreating to the position under the pressure limit of the feedback of the second pressure detector 8; similarly, when the right oil cylinder stroke detector 110 detects the deviation, in the preferred embodiment of the present application, when the right oil cylinder stroke detector 110 detects the deviation in the rock mode, the right clamp oil cylinder 109 can also be controlled to retreat to the full stroke and reverse after retreating to the position under the pressure limit of the feedback of the fourth pressure detector 108. In the preferred scheme, the stroke reversing and pressure reversing compound control method is adopted in the rock mode, that is, when the rock crusher oil cylinder extends, the pressure control reversing is adopted to ensure the crushing effect, when the rock crusher oil cylinder retracts, the stroke control reversing is adopted preferentially, so that the rock crusher oil cylinder does not need to extend and retract to the position, and the reversing impact of the rock crusher hydraulic system is reduced to the greatest extent; but when the stroke control reversing is deviated, the pressure control reversing is also started, so that the rock crusher oil cylinder is blocked to reverse, to ensure that the work continues normally.

[0033] Preferably, in actual work, if the stroke detection of the left oil cylinder stroke detector 10 is deviated, the left clamp oil cylinder 9 has been retracted (extended) to the position, but the program detects that the stroke has not been retracted (extended) to the set stroke, at this time, the host computer will control the left clamp oil cylinder 9 to continue to retract (extend), but the left clamp oil cylinder 9 has been retracted (extended) to the position, and it is actually impossible to continue to retract (extend), and finally the program will be in the state of retracting (extending) the left clamp oil cylinder 9, so in the preferred embodiment of the present application, the pressure control is connected in parallel on the basis of stroke control, when the stroke detection is deviated and the oil cylinder is retracted (extended) to the position, the pressure will be built up to reach the program set pressure, at this time, it is considered that the oil cylinder has been retracted (extended) to the position, and the extension is reversed, that is, in the preferred embodiment of the present application, when the left oil cylinder stroke detector 10 detects the deviation in the cleaning mode, the left clamp oil cylinder 9 can also be extended to the full stroke and reversed after extending to the position under the pressure limit feedback by the first pressure detector 7, or can be retracted to the full stroke and reversed after retracting to the position under the pressure limit feedback by the second pressure detector 8; similarly, when the right oil cylinder stroke detector 110 detects the deviation, in the preferred embodiment of the present application, the right clamp oil cylinder 109 can also be retracted to the full stroke and reversed after retracting to the position under the pressure limit feedback by the fourth pressure detector 108, or can be extended to the full stroke and reversed after extending to the position under the pressure limit feedback by the third pressure detector 107. The specific process is as follows.

[0034] When entering the cleaning mode, ① the left clamp oil cylinder 9 extends, and the right clamp oil cylinder 109 retracts, when the first pressure detector 7 detects that the left clamp oil cylinder 9 builds up pressure in the rodless cavity and the pressure reaches the program preset value, the left clamp oil cylinder 9 stops extending, when the fourth pressure detector 108 detects that the right clamp oil cylinder 109 builds up pressure in the rod cavity and the pressure reaches the program preset value, the right clamp oil cylinder 109 stops retracting, and the program controls the stone crusher to clean to the left; ② the left clamp oil cylinder 9 retracts, and the right clamp oil cylinder 109 extends, when the second pressure detector 8 detects that the left clamp oil cylinder 9 builds up pressure in the rod cavity and the pressure reaches the program preset value, the left clamp oil cylinder 9 stops retracting, when the third pressure detector 107 detects that the right clamp oil cylinder 109 builds up pressure in the rodless cavity and the pressure reaches the program preset value, the right clamp oil cylinder 109 stops extending, and the program controls the stone crusher oil cylinder to clean to the right. In the preferred scheme of the present application, the stroke reversing and pressure reversing compound control method is also used in the cleaning mode, so that the stone crusher oil cylinder can be reversed without extending or retracting to the position or building up pressure, so as to reduce the reversing impact of the stone crusher hydraulic system to the greatest extent, and to ensure that the pressure control is performed normally when the stroke detection is deviated.

[0035] Preferably, in order to eliminate the cumulative error of the stroke sensor (including the left cylinder stroke detector 10 and the right cylinder stroke detector 110) after the frequent extension and retraction of the rock breaker oil cylinder, in the preferred embodiment of the present application, the left clamp plate oil cylinder 9 and the right clamp plate oil cylinder 109 also perform full stroke back after each set of extension and retraction times under the pressure limit feedback by the second pressure detector 8 and the fourth pressure detector 108 connected respectively, and the host computer controls the left cylinder stroke detector 10 and the right cylinder stroke detector 110 to zero.

[0036] Optionally, as shown in Figure 1 The left oil cylinder control circuit further includes a first oil tank, a first drive pump set and a first directional valve 6, the oil inlet side of the first drive pump set is connected to the first oil tank, the oil outlet side of the first drive pump set is connected to the P position of the first directional valve 6, the A position of the first directional valve 6 is connected to the rodless cavity of the left clamp plate oil cylinder 9, the rod cavity of the left clamp plate oil cylinder 9 is connected to the B position of the first directional valve 6, the T position of the first directional valve 6 is connected to the first oil tank, the first pressure detector 7 is connected between the first directional valve 6 and the rodless cavity of the left clamp plate oil cylinder 9, and the second pressure detector 8 is connected between the first directional valve 6 and the rod cavity of the left clamp plate oil cylinder 9. The right oil cylinder control circuit further includes a second oil tank, a second drive pump set and a second directional valve 106, the oil inlet side of the second drive pump set is connected to the second oil tank, the oil outlet side of the second drive pump set is connected to the P position of the second directional valve 106, the A position of the second directional valve 106 is connected to the rodless cavity of the right clamp plate oil cylinder 109, the rod cavity of the right clamp plate oil cylinder 109 is connected to the B position of the second directional valve 106, the T position of the second directional valve 106 is connected to the second oil tank, the third pressure detector 107 is connected between the second directional valve 106 and the rodless cavity of the right clamp plate oil cylinder 109, and the fourth pressure detector 108 is connected between the second directional valve 106 and the rod cavity of the right clamp plate oil cylinder 109.

[0037] Further, as shown in Figure 1 The first drive pump set includes a first motor 1 and a first hydraulic pump 3, and a first coupling 2 connected between the first motor 1 and the first hydraulic pump 3. The second drive pump set includes a second motor 101 and a second hydraulic pump 103, and a second coupling 102 connected between the second motor 101 and the second hydraulic pump 103.

[0038] Preferably, the left oil cylinder control circuit further includes a first one-way valve 5 connected between the first drive pump set and the first directional valve 6, for preventing the hydraulic oil in the left clamp plate oil cylinder 9 from flowing back to the first hydraulic pump 3. The right oil cylinder control circuit further includes a second one-way valve 105 connected between the second drive pump set and the second directional valve 106, for preventing the hydraulic oil in the right clamp plate oil cylinder 109 from flowing back to the second hydraulic pump 103.

[0039] During operation, when the crusher cylinder is extended, the right side of the first reversing valve 6 (second reversing valve 106) is energized, and the oil from the first hydraulic pump 3 (second hydraulic pump 103) passes through the first one-way valve 5 (second one-way valve 105) and the P to A channel of the first reversing valve 6 (second reversing valve 106) into the rodless chamber of the left plywood cylinder 9 (right plywood cylinder 109), and the oil in the rod chamber of the left plywood cylinder 9 (right plywood cylinder 109) passes through the B to T channel of the first reversing valve 6 (second reversing valve 106) back to the first oil tank (second oil tank), and at this time the left plywood cylinder 9 (right plywood cylinder 109) is extended.

[0040] When the crusher cylinder retracts, the left side of the first reversing valve 6 (second reversing valve 106) is energized, and the oil from the first hydraulic pump 3 (second hydraulic pump 103) passes through the P to B channel of the first one-way valve 5 (second one-way valve 105) and the first reversing valve 6 (second reversing valve 106) and enters the rod chamber of the left plywood cylinder 9 (right plywood cylinder 109). The oil in the rodless chamber of the left plywood cylinder 9 (right plywood cylinder 109) passes through the A to T channel of the first reversing valve 6 (second reversing valve 106) and returns to the first oil tank (second oil tank). At this time, the left plywood cylinder 9 (right plywood cylinder 109) retracts.

[0041] Preferably, if Figure 1 As shown, the left cylinder control circuit further includes a first safety valve branch connected between the first drive pump group and the first non-return valve 5, with the oil outlet of the first safety valve branch connected to the first oil tank. In this preferred embodiment, the first safety valve branch includes a first safety valve 4 for limiting the outlet pressure of the first hydraulic pump 3. The right cylinder control circuit further includes a second safety valve branch connected between the second drive pump group and the second non-return valve 105, with the oil outlet of the second safety valve branch connected to the second oil tank. In this preferred embodiment, the second safety valve branch includes a second safety valve 104 for limiting the outlet pressure of the second hydraulic pump 103.

[0042] Optionally, a preferred embodiment of the present invention further relates to a slurry shield machine, comprising a slurry shield crusher hydraulic control system as described above.

[0043] When the stone crusher in the slurry shield machine of the present invention is working, it is divided into crushing mode and cleaning mode. The specific working mode is as follows:

[0044] 1. Crushing mode: The left clamping plate oil cylinder 9 and the right clamping plate oil cylinder 109 extend or retract at the same time. When extended to the right position, the direction is reversed by pressure control. When retracted, the direction is reversed by stroke control or pressure control.

[0045] Both extend: the first reversing valve 6 and the second reversing valve 106 are powered on the right side, and the left and right clamping oil cylinders (referring to the left clamping oil cylinder 9 and the right clamping oil cylinder 109) extend at the same time. Since the crushing mode requires the stone crusher oil cylinder to extend to the full stroke to crush the stones in the air cushion bin, when the detection values of the first pressure detector 7 and the third pressure detector 107 reach the program set value at the same time, the program considers that the left and right clamping oil cylinders have extended to the full stroke and completed the crushing of the stones, at which time the program controls the left and right clamping oil cylinders to retract.

[0046] Both retract: the first reversing valve 6 and the second reversing valve 106 are powered on the left side, and the left and right clamping oil cylinders retract at the same time. Since no crushing is performed during retraction, the left and right clamping oil cylinders do not need to be retracted to the position. When the left and right clamping oil cylinders retract, the left oil cylinder stroke detector 10 and the right oil cylinder stroke detector 110 detect the stroke of the left and right clamping oil cylinders, and when the stroke reaches the program set value, the left and right clamping oil cylinders stop retracting. At this time, the program controls the left and right clamping oil cylinders to extend and perform crushing work again.

[0047] When the left and right clamping oil cylinders retract, the stroke is detected by the left oil cylinder stroke detector 10 and the right oil cylinder stroke detector 110. To prevent detection errors of the stroke sensor (referring to the left oil cylinder stroke detector 10 and the right oil cylinder stroke detector 110), when the left and right clamping oil cylinders retract in the crushing mode, the pressure control reversing is connected in parallel, that is, when the left and right clamping oil cylinders retract to the program preset stroke value or the second pressure detector 8 and the fourth pressure detector 108 detect that the rod cavity of the left and right clamping oil cylinders reaches the program set pressure value, the left and right clamping oil cylinders stop retracting. At this time, the program controls the left and right clamping oil cylinders to extend and perform crushing work again.

[0048] To eliminate the cumulative error of the stroke sensor after the left and right clamping oil cylinders frequently extend and retract, after the left and right clamping oil cylinders extend and retract five times, the sixth retraction is only controlled by pressure, so that the stone crusher oil cylinder retracts to the position, and the program calibrates the stroke sensor of the stone crusher oil cylinder to zero.

[0049] II. In the cleaning mode, the left clamping oil cylinder 9 extends and the right clamping oil cylinder 109 retracts to clean to the right, and then the left clamping oil cylinder 9 retracts and the right clamping oil cylinder 109 extends to clean to the left.

[0050] When the right clamp oil cylinder 109 retracts, the travel of the right clamp oil cylinder 109 is detected by the right oil cylinder travel detector 110. When the travel reaches the program set value, the right clamp oil cylinder 109 stops retracting. After the left and right clamp oil cylinders stop moving, the program controls the left clamp oil cylinder 9 to retract and the right clamp oil cylinder 109 to extend, sweeping to the left side.

[0051] When the left clamp oil cylinder 9 extends and the right clamp oil cylinder 109 retracts in the sweeping mode, the travel of the left and right clamp oil cylinders is detected by the left oil cylinder travel detector 10 / right oil cylinder travel detector 110. In order to eliminate the cumulative error of the travel sensor after the left and right clamp oil cylinders frequently extend and retract, when the left clamp oil cylinder 9 extends and the right clamp oil cylinder 109 retracts in the sweeping mode, the travel control switching is used, and at the same time, the pressure control switching is used in parallel, that is, when the travel of the left clamp oil cylinder 9 extending reaches the program set value or the first pressure detector 7 detects that the left clamp oil cylinder 9 rodless cavity pressure reaches the program set value, the left clamp oil cylinder 9 stops extending. That is, when the travel of the right clamp oil cylinder 109 retracting reaches the program set value or the fourth pressure detector 108 detects that the right clamp oil cylinder 109 rod cavity pressure reaches the program set value, the right clamp oil cylinder 109 stops retracting. The program controls the left clamp oil cylinder 9 to retract and the right clamp oil cylinder 109 to extend, sweeping to the left side.

[0052] When sweeping to the left, it is opposite to sweeping to the right, and will not be repeated here.

[0053] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hydraulic control system for a slurry shield crusher, characterized in that: include: A left clamping plate oil cylinder (9) and a right clamping plate oil cylinder (109) respectively connected to the left clamping plate and the right clamping plate of the stone crushing clamp in the stone crusher, a left cylinder stroke detector (10) arranged in the left clamping plate oil cylinder (9) and a right cylinder stroke detector (110) arranged in the right clamping plate oil cylinder (109), a left cylinder control circuit respectively connected to the left clamping plate oil cylinder (9) and a right cylinder control circuit connected to the right clamping plate oil cylinder (109), and an upper computer connected to the left cylinder stroke detector (10), the right cylinder stroke detector (110), the left cylinder control circuit and the right cylinder control circuit; The left clamping plate oil cylinder (9) and the right clamping plate oil cylinder (109) are extended and retracted simultaneously under the action of the connected left cylinder control circuit and the right cylinder control circuit respectively in the stone crushing mode, and the left clamping plate oil cylinder (9) and the right clamping plate oil cylinder (109) are extended to the full stroke and reversed after being extended to the end under the pressure control of the rodless cavity, and the left clamping plate oil cylinder (9) and the right clamping plate oil cylinder (109) are retracted to a part of the full stroke and reversed after being retracted to the end under the stroke limit fed back by the built-in left cylinder stroke detector (10) and the right cylinder stroke detector (110); The left clamping plate oil cylinder (9) and the right clamping plate oil cylinder (109) both move in opposite directions simultaneously under the action of the connected left oil cylinder control circuit and the right oil cylinder control circuit in the cleaning mode. The left clamping plate oil cylinder (9) and the right clamping plate oil cylinder (109) also extend and retract in a non-full stroke and change direction after extending and retracting to the right position under the stroke limit fed back by the built-in left oil cylinder stroke detector (10) and the right oil cylinder stroke detector (110).

2. The hydraulic control system of the slurry shield crusher according to claim 1, characterized in that: The left oil cylinder control circuit includes a first pressure detector (7) and a second pressure detector (8) for respectively detecting the pressure in the rodless cavity and the rod cavity thereof; the right oil cylinder control circuit includes a third pressure detector (107) and a fourth pressure detector (108) for respectively detecting the pressure in the rodless cavity and the rod cavity thereof; the first pressure detector (7), the second pressure detector (8), the third pressure detector (107) and the fourth pressure detector (108) are respectively connected to a host computer; In the stone crushing mode, the left clamping plate oil cylinder (9) and the right clamping plate oil cylinder (109) are respectively extended to the full stroke and switched after being extended to the desired position under the pressure limit of the first pressure detector (7) and the third pressure detector (107).

3. The hydraulic control system of the slurry shield crusher according to claim 2, characterized in that: When the left plate oil cylinder (9) is in the stone crushing mode and the built-in left oil cylinder stroke detector (10) detects a deviation, the left plate oil cylinder (9) can also be fully retracted under the pressure limit of the second pressure detector (8) feedback and can be reversed after retracting to the desired position; When the right plate oil cylinder (109) is in the stone crushing mode and the built-in right oil cylinder stroke detector (110) detects a deviation, the right plate oil cylinder (109) can also perform full stroke retreat and reverse direction after retreating to the desired position under the pressure limit fed back by the fourth pressure detector (108).

4. The hydraulic control system of the slurry shield crusher according to claim 2, characterized in that: When the left plate oil cylinder (9) is in the cleaning mode and the left oil cylinder stroke detector (10) detects a deviation, the left plate oil cylinder (9) can also extend the full stroke and change direction after extending to the end under the pressure limit of the first pressure detector (7), or retract the full stroke and change direction after retracting to the end under the pressure limit of the second pressure detector (8); When the right plywood oil cylinder (109) detects a deviation in the cleaning mode, the right plywood oil cylinder (109) can also perform a full stroke retraction and change direction after retraction into position under the pressure limit of the fourth pressure detector (108) feedback, or perform a full stroke extension and change direction after extension into position under the pressure limit of the third pressure detector (107) feedback.

5. The hydraulic control system of the slurry shield crusher according to claim 2, characterized in that: The left clamping plate oil cylinder (9) and the right clamping plate oil cylinder (109) also perform full stroke retraction under the pressure limit of the second pressure detector (8) and the fourth pressure detector (108) respectively connected to them after each set extension and retraction number, and at the same time, the upper computer controls the left cylinder stroke detector (10) and the right cylinder stroke detector (110) to zero.

6. The hydraulic control system of a slurry shield crusher according to claim 2, characterized in that: The left oil cylinder control circuit also includes a first oil tank, a first drive pump group and a first reversing valve (6), the oil inlet side of the first drive pump group is connected to the first oil tank, the oil outlet side of the first drive pump group is connected to the P position of the first reversing valve (6), the A position of the first reversing valve (6) is connected to the rodless chamber of the left clamping plate oil cylinder (9), the rod chamber of the left clamping plate oil cylinder (9) is connected to the B position of the first reversing valve (6), the T position of the first reversing valve (6) is connected to the first oil tank, the first pressure detector (7) is connected between the first reversing valve (6) and the rodless chamber of the left clamping plate oil cylinder (9), and the second pressure detector (8) is connected between the first reversing valve (6) and the rod chamber of the left clamping plate oil cylinder (9); The right oil cylinder control circuit also includes a second oil tank, a second drive pump group and a second reversing valve (106), the oil inlet side of the second drive pump group is connected to the second oil tank, the oil outlet side of the second drive pump group is connected to the P position of the second reversing valve (106), the A position of the second reversing valve (106) is connected to the rodless chamber of the right plywood oil cylinder (109), the rod chamber of the right plywood oil cylinder (109) is connected to the B position of the second reversing valve (106), the T position of the second reversing valve (106) is connected to the second oil tank, and the third pressure detector (107) is connected between the second reversing valve (106) and the rodless chamber of the right plywood oil cylinder (109), and the fourth pressure detector (108) is connected between the second reversing valve (106) and the rod chamber of the right plywood oil cylinder (109).

7. The hydraulic control system of a slurry shield crusher according to claim 6, characterized in that: The first driving pump group includes a first motor (1) and a first hydraulic pump (3), and a first coupling (2) connected between the first motor (1) and the first hydraulic pump (3); The second driving pump group includes a second motor (101) and a second hydraulic pump (103), and a second coupling (102) connected between the second motor (101) and the second hydraulic pump (103).

8. The hydraulic control system of a slurry shield crusher according to claim 6, characterized in that: The left oil cylinder control circuit further includes a first one-way valve (5) connected between the first drive pump group and the first reversing valve (6) to prevent the hydraulic oil in the left clamping plate oil cylinder (9) from flowing back to the first hydraulic pump (3); The right oil cylinder control circuit further includes a second one-way valve (105) connected between the second drive pump group and the second reversing valve (106) to prevent the hydraulic oil in the right clamping plate oil cylinder (109) from flowing back to the second hydraulic pump (103).

9. The hydraulic control system of a slurry shield crusher according to claim 8, characterized in that: The left oil cylinder control circuit further includes a first safety valve branch connected between the first drive pump group and the first one-way valve (5), and the oil outlet end of the first safety valve branch is connected to the first oil tank; The right oil cylinder control circuit also includes a second safety valve branch connected between the second drive pump group and the second one-way valve (105), and the oil outlet end of the second safety valve branch is connected to the second oil tank.

10. A slurry shield machine, characterized in that: It comprises a hydraulic control system for a slurry shield crusher according to any one of claims 1 to 9.

Images