A hydraulic system for central pumping

Abstract

The present invention relates to the field of central pumping hydraulic technology, and specifically discloses a hydraulic system for central pumping, including a centrifugal pump and a water tank housing, wherein the centrifugal pump is installed on the top of the water tank housing, and the bottom thereof penetrates into the interior of the water tank housing, and a water outlet box is arranged on the water tank housing, and the inlet end of the water outlet box is connected with the outlet end of the centrifugal pump, and a water outlet and an overflow valve are also arranged at the side end of the water outlet box. The hydraulic system for central pumping provided by the present invention can filter all impurities deposited at the bottom through a first fine filter screen by arranging a cleaning brush, and the impurities are collected by the first fine filter screen, until the set time is reached, the first fine filter screen is reversed 180 degrees, and the particles are separated from the first fine filter screen, and wait to be rotated upward again later, and at this time, there are no impurity particles on the surface of the second fine filter screen located above, and filtering can continue, thereby achieving the purpose of replacing the filter structure while transporting the collected impurity particles.

Description

Technical Field

[0001] The invention relates to the technical field of central pumping hydraulics, and in particular to a hydraulic system for central pumping. Background Art

[0002] The traditional cooling method of cutting equipment has limited effect on removing chips from holes, especially for chips in depth and chips at the bottom of the hole, which will always be in contact with the tool. These chips will cause the hole diameter to exceed the tolerance, destroy the finish, and cause premature wear of the tool. The water outlet from the center of the spindle can also be called spindle internal cooling and tool internal cooling. The coolant is directly transferred to the straight cutting part of the tool through the inside of the spindle in a pressurized form. In addition to cooling the tool in time, it can also use high-pressure coolant to vigorously flush the chips milled out of the workpiece.

[0003] Since some chips or metal particles will be generated during the flushing process, a filtering mechanism is needed to filter the water so that it can be recycled. The existing hydraulic system's filtering mechanism, when filtering tiny metal particles, the filter is prone to clogging after long-term use, resulting in reduced water flux and affecting the water output effect. If it is repeatedly replaced, the workload is increased. Summary of the invention

[0004] The object of the present invention is to provide a hydraulic system for central pumping to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A hydraulic system for central pumping, comprising a centrifugal pump and a water tank housing, wherein the centrifugal pump is mounted on the top of the water tank housing, and the bottom thereof penetrates into the interior of the water tank housing, a water outlet box is arranged on the water tank housing, the inlet end of the water outlet box is connected with the outlet end of the centrifugal pump, a water outlet and an overflow valve are also arranged at the side end of the water outlet box, the water outlet is connected with the cooling system of the cutting equipment, and is used for cooling the cutting equipment tool; a return pipe is also arranged on the top of the water tank housing, the return pipe is connected with the cooling system of the cutting equipment, and is responsible for conveying the coolant to the return pipe, a primary filter box and a secondary filter box are also arranged on the top of the water tank housing, and the return pipe , the first-level filter box is connected to the second-level filter box, a coarse filter screen is arranged inside the first-level filter box, and a filter component is arranged inside the second-level filter box; the filter component includes a filter plate fixedly connected to the inner wall of the second-level filter box, a slag storage tank is provided on the filter plate, a water outlet is provided on the filter plate, the water outlet is connected to the slag storage tank, a plurality of slag cutting components are rotatably connected to the slag storage tank, the slag cutting components include a first fine filter screen, a connecting plate and a second fine filter screen, which are used for secondary filtration of the refluxed coolant; a switching component is arranged on the slag cutting component, and the switching component is used to replace the positions of the first fine filter screen and the second fine filter screen at a set time.

[0007] Furthermore, a cleaning component is provided on the filter component, and the cleaning component includes a reduction motor fixedly connected to the top of the secondary filter box, the bottom of the reduction motor is fixedly connected to a driving shaft, the outer end of the driving shaft is fixedly connected to a plurality of connecting rods, and the bottom of the connecting rod is fixedly connected to a cleaning brush, and the cleaning brush can push the precipitated particles onto the slag cutting component during rotation.

[0008] Furthermore, the number of the slag cutting components is four and they are evenly distributed in a ring shape. The first fine filter screen is fixedly connected to the second fine filter screen by a connecting plate. Both the first fine filter screen and the second fine filter screen are in a lower arc surface structure to collect particles.

[0009] Furthermore, the switching component includes multiple first rotating shafts, a first gear group and a second gear group. The filter plate is provided with a movable groove for accommodating the first gear group and the second gear group. The first rotating shaft is fixedly connected to the adjacent connecting plate. The first gear group and the second gear group are both composed of a pair of transmission gears. The pair of transmission gears are meshed and connected with each other. The outer end of the first rotating shaft is fixedly sleeved with the corresponding transmission gear. The first rotating shaft rotates 180 degrees with the first fine filter so that the collected particles are dumped into the slag storage tank.

[0010] Furthermore, the switching component also includes a first transmission plate fixedly connected to the bottom end of the driving shaft, a telescopic rod is fixedly connected to the bottom of the first transmission plate, an electromagnet is fixedly connected to the bottom of the telescopic rod, a deflector is fixedly connected to the aluminum plate, a second rotating shaft is rotatably connected to the deflector, a first bevel gear is fixedly sleeved on the second rotating shaft, a second bevel gear is fixedly sleeved on one of the first rotating shafts, the first bevel gear and the second bevel gear are meshedly connected, a second transmission plate is fixedly connected to the top of the second rotating shaft, and a plurality of transmission holes are opened on the second transmission plate.

[0011] Furthermore, the bottom of the slag storage tank is a through structure, and a slag discharge bucket is fixedly connected to the bottom surface of the filter plate near the slag storage tank.

[0012] Furthermore, an intermittent slag discharge component is provided at the bottom of the filter plate, and the intermittent slag discharge component includes a slag collecting box fixedly connected to the inner wall of the water tank shell, and a baffle is rotatably connected to the top of the slag collecting box, and a plurality of slag inlets are opened on the baffle. The baffle fits and slides with the slag discharge bucket, and the slag inlets are initially staggered with the slag discharge bucket.

[0013] Furthermore, a first reduction gear is fixedly sleeved on one of the first rotating shafts, and a third rotating shaft is also rotatably connected to the movable groove. A second reduction gear is fixedly sleeved on the third rotating shaft, and the second reduction gear is meshed with the first reduction gear. A toggle tooth is fixedly sleeved on the third rotating shaft, a switching shaft is fixedly connected on the baffle, and a driven gear disk is fixedly sleeved on the switching shaft, and the driven gear disk rotates a set angle every time the toggle tooth rotates one circle.

[0014] Furthermore, a sliding damper is provided between the baffle and the top of the slag collecting box, a water outlet pipe is provided at the bottom of the water outlet hole, and the bottom of the water outlet pipe is lower than the bottom of the slag collecting box.

[0015] In the above technical solution, the hydraulic system for central pumping provided by the present invention has the following beneficial effects:

[0016] By setting a cleaning brush, the impurities settled at the bottom can be filtered through the first fine filter and collected by it until the set time is reached. By rotating the positions of the first fine filter and the second fine filter and turning the first fine filter 180 degrees, the particles can be separated from the first fine filter and wait to be rotated upward again. At this time, there are no impurity particles on the surface of the second fine filter located above, and filtering can continue, thereby realizing the replacement of the filter structure while transporting the collected impurity particles, ensuring the continuous operation of the device.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0018] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of the overall external structure provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the external structure of a secondary filter box provided in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the internal structure of a secondary filter box provided in an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of a top view of the filter plate provided in an embodiment of the present invention;

[0024] Figure 5 A bottom-up structural diagram of a filter plate provided in an embodiment of the present invention

[0025] Figure 6 A schematic diagram of the internal structure of the air deflector provided in an embodiment of the present invention;

[0026] Figure 7 The embodiment of the present invention provides Figure 5 A schematic diagram of the enlarged structure at point A;

[0027] Figure 8 The embodiment of the present invention provides Figure 5 Schematic diagram of the structure at B;

[0028] Fig. 9 A schematic diagram of the top surface structure of a slag collecting box provided in an embodiment of the present invention;

[0029] Fig.10 The embodiment of the present invention provides Figure 8 Enlarged structural diagram at C.

[0030] Description of reference numerals:

[0031] 1. Centrifugal pump; 2. Water tank shell; 3. Water outlet box; 31. Water outlet; 32. Overflow valve; 4. Return pipe; 5. Primary filter box; 6. Secondary filter box; 7. Filter component; 71. Filter plate; 72. Slag storage tank; 73. Water outlet hole; 74. Slag discharge bucket; 75. Water outlet pipe; 8. Slag cutting component; 81. First fine filter screen; 82. Connecting plate; 83. Second fine filter screen; 9. Switching component; 91. First rotating shaft; 92. First gear set; 93. Second gear set; 94. First transmission disc; 95. Telescopic rod; 96. Electromagnet ; 97. air deflector; 98. second rotating shaft; 99. first bevel gear; 910. second bevel gear; 911. second transmission plate; 912. transmission hole; 10. cleaning component; 101. reduction motor; 102. driving shaft; 103. connecting rod; 104. cleaning brush; 11. intermittent slag discharge component; 111. slag collecting box; 112. baffle; 113. slag inlet; 114. first reduction gear; 115. third rotating shaft; 116. second reduction gear; 117. toggle gear; 118. switching shaft; 119. driven gear plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] See also Figure 1-5A hydraulic system for central pumping includes a centrifugal pump 1 and a water tank housing 2. The centrifugal pump 1 is installed on the top of the water tank housing 2, and the bottom penetrates into the water tank housing 2. A water outlet box 3 is arranged on the water tank housing 2. The inlet end of the water outlet box 3 is connected with the outlet end of the centrifugal pump 1. A water outlet 31 and a relief valve 32 are also arranged at the side end of the water outlet box 3. The water outlet 31 is connected with the cooling system of the cutting equipment and is used to cool the cutting equipment tool; a return pipe 4 is also arranged on the top of the water tank housing 2. The return pipe 4 is connected with the cooling system of the cutting equipment and is responsible for conveying the coolant to the return pipe 4. A primary filter box 5 and a secondary filter box 6 are also arranged on the top of the water tank housing 2. The return pipe 4 and the primary filter box 5 It is connected to the secondary filter box 6, the interior of the primary filter box 5 is provided with a coarse filter screen, and the interior of the secondary filter box 6 is provided with a filter component 7; the filter component 7 includes a filter plate 71 fixedly connected to the inner wall of the secondary filter box 6, the filter plate 71 is provided with a slag storage groove 72, the filter plate 71 is provided with a water outlet 73, the water outlet 73 is connected to the slag storage groove 72, and a plurality of slag cutting components 8 are rotatably connected to the slag storage groove 72, the slag cutting component 8 includes a first fine filter screen 81, a connecting plate 82 and a second fine filter screen 83, which are used for secondary filtering of the refluxed coolant; the slag cutting component 8 is provided with a switching component 9, and the switching component 9 is used to replace the positions of the first fine filter screen 81 and the second fine filter screen 83 at a set time.

[0034] Specifically, the hydraulic system is suitable for cooling the cutting tool of the cutting equipment. The cutting tool generates a large amount of heat during the long-term cutting process and needs to be cooled in time by the coolant. The centrifugal pump 1 is responsible for pumping up the coolant inside the water tank shell 2. The coolant enters the water outlet tank 3 and is connected to the pipeline of the cooling system through the water outlet 31. The cooling system includes a cooling pipe. One end of the cooling pipe extends to the inside of the equipment, and the other end is connected to the water outlet 31. The water inside the equipment is connected to the return pipe 4 through a pipeline, and finally passes through the primary filter box 5 and the secondary filter box 6 and returns to the inside of the water tank shell 2.

[0035] The primary filter box 5 is detachably connected with a coarse filter screen inside, which is responsible for intercepting small parts to prevent excessive water pressure from flushing some small parts in. The secondary filter box 6 is provided with a first fine filter screen 81, which is responsible for intercepting fine particles. After the coolant passes through the first fine filter screen 81, it flows out from the water outlet 73 next to it, completing the secondary filtration.

[0036] Due to long-term scouring, the number of particles on the first fine filter 81 increases, resulting in a decrease in the amount of liquid passing through. Therefore, the positions of the first fine filter 81 and the second fine filter 83 can be rotated, and the first fine filter 81 can be turned upside down 180 degrees to separate the particles from the first fine filter 81, waiting to be rotated upward again. At this time, there are no impurity particles on the surface of the second fine filter 83 located above, and filtering can continue.

[0037] In an embodiment further provided by the present invention, a cleaning component 10 is provided on the filter component 7, and the cleaning component 10 includes a reduction motor 101 fixedly connected to the top of the secondary filter box 6, and the bottom of the reduction motor 101 is fixedly connected to a drive shaft 102, and the outer end of the drive shaft 102 is fixedly connected to a plurality of connecting rods 103, and the bottom of the connecting rod 103 is fixedly connected to a cleaning brush 104, and the cleaning brush 104 can push the precipitated particles onto the slag cutting component 8 during rotation.

[0038] In an embodiment further provided by the present invention, the number of the slag cutting components 8 is four and they are evenly distributed in a ring shape. The first fine filter 81 and the second fine filter 83 are fixedly connected by a connecting plate 82. The first fine filter 81 and the second fine filter 83 both have a lower arc surface structure to collect particles.

[0039] By arranging the first fine filter 81 and the second fine filter 83 into a lower arc surface structure, the purpose of preserving foreign particles can be achieved, and the particles can be effectively prevented from being dispersed to the side by the water flow, thereby improving the collection effect of foreign particles.

[0040] See also Figure 6-8 In a solution further provided by the present invention, the switching component 9 includes a plurality of first rotating shafts 91, a first gear set 92 and a second gear set 93. The filter plate 71 is provided with a movable groove for accommodating the first gear set 92 and the second gear set 93. The first rotating shaft 91 is fixedly connected to the adjacent connecting plate 82. The first gear set 92 and the second gear set 93 are both composed of a pair of transmission gears. The pair of transmission gears are meshed and connected. The outer end of the first rotating shaft 91 is fixedly sleeved with the corresponding transmission gear. The first rotating shaft 91 rotates 180 degrees with the first fine filter 81 so that the collected particles are dumped into the slag storage tank 72.

[0041] In the present invention, the switching component 9 also includes a first transmission plate 94 fixedly connected to the bottom end of the driving shaft 102, a telescopic rod 95 is fixedly connected to the bottom of the first transmission plate 94, an electromagnet 96 is fixedly connected to the bottom of the telescopic rod 95, a deflector 97 is fixedly connected to the aluminum plate, a second rotating shaft 98 is rotatably connected to the deflector 97, a first bevel gear 99 is fixedly sleeved on the second rotating shaft 98, a second bevel gear 910 is fixedly sleeved on one of the first rotating shafts 91, the first bevel gear 99 is meshingly connected to the second bevel gear 910, a second transmission plate 911 is fixedly connected to the top of the second rotating shaft 98, and a plurality of transmission holes 912 are provided on the second transmission plate 911.

[0042] Specifically, four slag cutting components 8 are designed and are symmetrically distributed in pairs. A pair of symmetrical first rotating shafts 91 are fixedly connected, and another pair of first rotating shafts 91 are not in contact with each other. The adjacent pair of first rotating shafts 91 are driven by a pair of transmission gears. In actual design, the first gear set 92 and the second gear set 93 are of different sizes. The second bevel gear 910 is sleeved on the pair of first rotating shafts 91 connected to each other, and an iron sheet is provided inside the transmission hole 912.

[0043] After the tool is cooled each time, the electromagnet 96 is turned on to move the electromagnet 96 to the inside of the transmission hole 912 and adsorbed with the iron sheet, so that the telescopic rod 95 is extended. A return spring is arranged inside the telescopic rod 95. After the bottom of the telescopic rod 95 enters the transmission hole 912, during the rotation of the drive shaft 102, it rotates with the cleaning brush 104 on one side and the second rotating shaft 98 on the other side. The second bevel gear 910 is rotated through the first bevel gear 99, so that a pair of first rotating shafts 91 rotate. The pair of first rotating shafts 91 rotates with the adjacent first rotating shafts 91 through the transmission gear, so that the four first rotating shafts 91 rotate synchronously, and the four connecting plates 82 are turned over, and finally the first fine filter 81 and the second fine filter 83 are swapped in position, which can not only filter the coolant, but also send the particles generated during this cooling process into the slag storage tank 72.

[0044] See also Figure 9-10 In a solution further provided by the present invention, the bottom of the slag storage tank 72 is a through-shaped structure, and a slag discharge bucket 74 is fixedly connected to the bottom surface of the filter plate 71 near the slag storage tank 72.

[0045] An intermittent slag discharge component 11 is provided at the bottom of the filter plate 71, and the intermittent slag discharge component 11 includes a slag collecting box 111 fixedly connected to the inner wall of the water tank shell 2, and a baffle 112 is rotatably connected to the top of the slag collecting box 111. The baffle 112 is provided with a plurality of slag inlets 113. The baffle 112 and the slag discharge bucket 74 are fitted and slidably connected, and the slag inlets 113 are initially staggered with the slag discharge bucket 74.

[0046] By setting up the slag discharge bucket 74 and the baffle 112, the baffle 112 can be used to block the slag discharge bucket 74, and the particles are accumulated inside the slag discharge bucket 74 for a long time, which is not only conducive to the collection of particles, but also can achieve the purpose of drainage under the action of gravity. As the number of particles increases, water is gradually discharged, so that the water wasted in the next slag discharge process is reduced.

[0047] A first reduction gear 114 is fixedly sleeved on one of the first rotating shafts 91, and a third rotating shaft 115 is also rotatably connected to the movable groove. A second reduction gear 116 is fixedly sleeved on the third rotating shaft 115, and the second reduction gear 116 is meshed with the first reduction gear 114. A toggle tooth 117 is fixedly sleeved on the third rotating shaft 115, and a switching shaft 118 is fixedly connected to the baffle 112. A driven gear disc 119 is fixedly sleeved on the switching shaft 118, and the driven gear disc 119 rotates a set angle every time the toggle tooth 117 rotates one circle.

[0048] A sliding damper is provided between the baffle 112 and the top of the slag collecting box 111 . A water outlet pipe 75 is provided at the bottom of the water outlet hole 73 . The bottom of the water outlet pipe 75 is lower than the bottom of the slag collecting box 111 .

[0049] During the rotation of the first rotating shaft 91, the first reduction gear 114 is also rotated with it. There is a gear ratio between the first reduction gear 114 and the second reduction gear 116, and the gear ratio is 1:10-20. It is known that the first reduction gear 114 rotates 0.5 turns each time. If the gear ratio of 1:20 is taken as an example, when the first reduction gear 114 rotates 40 turns, the second reduction gear 116 rotates one turn. When it is about to rotate one turn, it will also slowly rotate with the baffle 112, so that the impurity particles inside the slag discharge bucket 74 can enter the slag collecting box 111 through the slag inlet 113, so that the slag collecting box 111 serves the purpose of storing impurity particles. Since the slag inlet 113 is a fan-shaped structure, slag can be discharged during the rotation process until the slag discharge bucket 74 is staggered with the slag inlet 113, and the second reduction gear 116 just stops rotating.

[0050] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hydraulic system for central pumping, comprising a centrifugal pump (1) and a water tank housing (2), wherein the centrifugal pump (1) is mounted on the top of the water tank housing (2) and the bottom thereof penetrates into the interior of the water tank housing (2), and is characterized in that: A water outlet box (3) is provided on the water tank housing (2); the inlet end of the water outlet box (3) is in communication with the outlet end of the centrifugal pump (1); a water outlet (31) and an overflow valve (32) are also provided at the side end of the water outlet box (3); the water outlet (31) is in communication with a cutting equipment cooling system for cooling the cutting equipment tool; A return pipe (4) is also provided on the top of the water tank housing (2). The return pipe (4) is in communication with the cooling system of the cutting equipment and is responsible for conveying the coolant to the return pipe (4). A primary filter box (5) and a secondary filter box (6) are also provided on the top of the water tank housing (2). The return pipe (4), the primary filter box (5) and the secondary filter box (6) are in communication with each other. A coarse filter screen is provided inside the primary filter box (5), and a filter component (7) is provided inside the secondary filter box (6); The filter component (7) comprises a filter plate (71) fixedly connected to the inner wall of the secondary filter box (6), the filter plate (71) is provided with a slag storage groove (72), the filter plate (71) is provided with a water outlet hole (73), the water outlet hole (73) is communicated with the slag storage groove (72), the slag storage groove (72) is rotatably connected with a plurality of slag cutting components (8), the slag cutting components (8) comprising a first fine filter screen (81), a connecting plate (82) and a second fine filter screen (83), and are used for secondary filtering of the refluxed coolant; The slag cutting component (8) is provided with a switching component (9), and the switching component (9) is used to replace the positions of the first fine filter (81) and the second fine filter (83) at a set time.

2. The hydraulic system for central pumping according to claim 1, characterized in that: The filter component (7) is provided with a cleaning component (10), the cleaning component (10) comprising a reduction motor (101) fixedly connected to the top of the secondary filter box (6), the bottom of the reduction motor (101) being fixedly connected to a drive shaft (102), the outer end of the drive shaft (102) being fixedly connected to a plurality of connecting rods (103), the bottom of the connecting rods (103) being fixedly connected to a cleaning brush (104), and the cleaning brush (104) can push the precipitated particles onto the slag cutting component (8) during its rotation.

3. The hydraulic system for central pumping according to claim 2, characterized in that: The number of the slag cutting components (8) is four and they are evenly distributed in a ring shape. The first fine filter (81) and the second fine filter (83) are fixedly connected via a connecting plate (82). Both the first fine filter (81) and the second fine filter (83) are lower arc-shaped structures for collecting particles.

4. The hydraulic system for central pumping according to claim 3, characterized in that: The switching component (9) comprises a plurality of first rotating shafts (91), a first gear set (92) and a second gear set (93); a movable groove for accommodating the first gear set (92) and the second gear set (93) is provided on the filter plate (71); the first rotating shaft (91) is fixedly connected to a connecting plate (82) adjacent thereto; the first gear set (92) and the second gear set (93) are each composed of a pair of transmission gears; the pair of transmission gears are meshingly connected; an outer end of the first rotating shaft (91) is fixedly sleeved with a corresponding transmission gear; the first rotating shaft (91) rotates 180 degrees with the first fine filter (81) so that the particles collected by the first fine filter are dumped into the slag storage tank (72).

5. The hydraulic system for central pumping according to claim 4, characterized in that: The switching component (9) further comprises a first transmission disc (94) fixedly connected to the bottom end of the driving shaft (102); a telescopic rod (95) is fixedly connected to the bottom of the first transmission disc (94); an electromagnet (96) is fixedly connected to the bottom of the telescopic rod (95); a deflector (97) is fixedly connected to the filter plate (71); a second rotating shaft (98) is rotatably connected to the deflector (97); a first bevel gear (99) is fixedly sleeved on the second rotating shaft (98); a second bevel gear (910) is fixedly sleeved on one of the first rotating shafts (91); the first bevel gear (99) and the second bevel gear (910) are meshingly connected; a second transmission disc (911) is fixedly connected to the top of the second rotating shaft (98); and a plurality of transmission holes (912) are provided on the second transmission disc (911).

6. The hydraulic system for central pumping according to claim 5, characterized in that: The bottom of the slag storage tank (72) is a through-shaped structure, and a slag discharge bucket (74) is fixedly connected to the bottom surface of the filter plate (71) near the slag storage tank (72).

7. The hydraulic system for central pumping according to claim 6, characterized in that: An intermittent slag discharge component (11) is provided at the bottom of the filter plate (71), the intermittent slag discharge component (111) comprising a slag collecting box (111) fixedly connected to the inner wall of the water tank shell (2), a baffle (112) rotatably connected to the top of the slag collecting box (111), a plurality of slag inlets (113) being provided on the baffle (112), the baffle (112) and the slag discharge bucket (74) being fitted and slidable, the slag inlets (113) being initially staggered with the slag discharge bucket (74).

8. The hydraulic system for central pumping according to claim 7, characterized in that: A first reduction gear (114) is fixedly sleeved on one of the first rotating shafts (91), a third rotating shaft (115) is rotatably connected to the movable groove, a second reduction gear (116) is fixedly sleeved on the third rotating shaft (115), the second reduction gear (116) is meshed with the first reduction gear (114), a shifting tooth (117) is fixedly sleeved on the third rotating shaft (115), a switching shaft (118) is fixedly connected to the baffle plate (112), a driven tooth disc (119) is fixedly sleeved on the switching shaft (118), and the driven tooth disc (119) rotates a set angle each time the shifting tooth (117) rotates one circle.

9. The hydraulic system for central pumping according to claim 8, characterized in that: A sliding damper is provided between the baffle (112) and the top of the slag collecting box (111), and a water outlet pipe (75) is provided at the bottom of the water outlet hole (73), and the bottom of the water outlet pipe (75) is lower than the bottom of the slag collecting box (111).

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