Machine tool rest facilitating tool replacement

Abstract

The invention is applicable to the related technical field of numerical control machine tools, and provides a machine tool rest convenient for tool replacement, which comprises a main connecting plate, a rotating motor is fixedly connected to the main connecting plate, a first rotating shaft is fixedly connected to the output end of the rotating motor, and a first connecting plate is fixedly connected to the side surface of the first rotating shaft; a first connecting plate is fixedly connected to the side face of the first rotating shaft, a first clamping unit used for clamping a tool body is arranged on the first connecting plate, a second connecting plate is fixedly connected to the side face of the first rotating shaft, and a second clamping unit used for clamping the tool body is arranged on the second connecting plate; a rotating motor rotates to drive a first rotating shaft to rotate so as to drive a tool main body clamped on a first connecting plate and a second connecting plate to rotate so that the tool main body can be replaced, and when the tool main body is replaced, machining of a machine tool cannot be affected; and through the arrangement of the first clamping unit and the second clamping unit, different cutter main bodies can be stably clamped.

Description

Technical Field

[0001] The present invention belongs to the technical field related to numerical control machine tools, and particularly relates to a machine tool turret facilitating tool replacement. Background Art

[0002] A lathe tool of a machine tool is a tool used for turning processing, featuring high precision, high efficiency, and strong flexibility. It can achieve precision machining of various materials and is widely used in fields such as aerospace, automobile manufacturing, and mold processing. The development of lathe tools for numerical control machine tools has made the processing process more automated and intelligent, greatly improving production efficiency and processing quality.

[0003] After retrieval, a Chinese patent with the patent publication number CN222403497U and the name of a tool replacement device for a numerical control machine tool lathe tool installs the required tool on a nut seat before turning, and then controls the corresponding motor to start. The motor drives a threaded rod to rotate. Through the cooperation of a guide groove and a guide block, when the threaded rod rotates, it drives a slider and a lifting block to descend, thereby driving a mounting plate and a tool to descend for turning work. When tool replacement is required, while controlling the relevant motor to reverse, the motor corresponding to the tool to be replaced is also controlled to start, so that the old tool ascends while the new tool to be replaced descends. There is no need to remove the tool and then reinstall it, saving working time and improving work efficiency. However, when the above device is actually used, there are some deficiencies. When the tool is performing cutting processing, usually only one tool is used for cutting. When tool replacement is needed, the entire device has to be stopped for replacement, which is time-consuming and laborious. Based on this, a machine tool turret facilitating tool replacement that can solve the above problems is now proposed. Summary of the Invention

[0004] The present invention provides a machine tool turret facilitating tool replacement, aiming to solve the problem that when a tool is performing cutting processing, usually only one tool is used for cutting, and when tool replacement is needed, the entire device has to be stopped for replacement.

[0005] The present invention is implemented as follows. A machine tool turret facilitating tool replacement includes a main connection plate, which is connected to an external device. A rotating motor is fixedly connected to the main connection plate. The output end of the rotating motor is fixedly connected to a first rotating shaft. A first connection plate is fixedly connected to the side of the first rotating shaft. A first clamping unit for clamping a tool body is arranged on the first connection plate. A second connection plate is fixedly connected to the side of the first rotating shaft. A second clamping unit for clamping the tool body is arranged on the second connection plate.

[0006] Preferably, the first clamping unit includes two first clamping blocks symmetrically arranged. A first guiding block is fixedly connected to the side surface of the first clamping block. Symmetrically arranged first clamping grooves are formed on the first connecting plate. A first guiding rod is fixedly connected in the first clamping groove. The first guiding block is sleeved outside the first guiding rod. The side surface of the first guiding block is connected to the side surface of the first clamping groove through a first spring for providing elastic force. The first spring is sleeved outside the first guiding rod.

[0007] Preferably, two groups of second guiding rods are fixedly connected between the first connecting plate and the second connecting plate. A pressing plate is sleeved outside each group of second guiding rods. A second clamping block is fixedly connected to the side surface of the pressing plate. A first inclined surface is arranged on the first clamping block. A second inclined surface is arranged on the second clamping block. The side surface of the second clamping block is connected to the side surface of the second connecting plate through a second spring for providing elastic force. The second spring is sleeved outside the second guiding rod.

[0008] Preferably, a first curved surface is arranged on the side surface of the first clamping block.

[0009] Preferably, a third connecting plate is fixedly connected to the main connecting plate. A through groove is formed on the third connecting plate.

[0010] Preferably, the second clamping unit includes a third clamping block inserted on the second connecting plate. A second guiding block is fixedly connected to the side surface of the third clamping block. A second clamping groove matching with the second guiding block is formed on the second connecting plate. The side surface of the second guiding block is connected to the side surface of the second clamping groove through a third spring for providing elastic force. A pressing block is fixedly connected to the side surface of the third connecting plate. A second curved surface is arranged on the side surface of the third clamping block. A third curved surface is arranged on the side surface of the pressing block.

[0011] Preferably, a cooling unit for cooling the tool body is arranged on the main connecting plate.

[0012] Preferably, the cooling unit includes symmetrically arranged first water outlet pipes fixedly connected to the main connecting plate. Cooling openings are arranged on the first water outlet pipes. A second water outlet pipe is fixedly connected to the side surface of the second connecting plate through a first connecting pipe. The second water outlet pipe is in contact with the side wall of the tool body. The first water outlet pipe is fixedly connected to the adjusting box body. An annular connecting pipe is fixedly connected to the main connecting plate. The annular connecting pipe is connected to an external output mechanism. The annular connecting pipe is connected to the adjusting box body through an adjusting unit.

[0013] Preferably, the adjusting unit includes a rotating ring, which is fixedly connected to the second connecting plate through a second connecting rod. An adjusting block is fixedly connected to the side surface of the rotating ring. Symmetric third inclined surfaces are provided on the adjusting block. A connecting frame body is fixedly connected to the side surface of the annular connecting pipe. A third guiding rod is fixedly connected to the connecting frame body. A moving block is sleeved outside the third guiding rod. A third water outlet pipe is fixedly connected to the side surface of the moving block. An adjusting plate is fixedly connected to the side surface of the moving block. The side surface of the moving block is connected to the side wall of the connecting frame through a fourth spring for providing elastic force. The fourth spring is sleeved outside the third guiding rod. The moving block is connected to the annular connecting pipe through a connecting hose in a penetrating manner. Two water outlet ports are provided on the third water outlet pipe. Two water inlet ports are provided on the adjusting box body. The water inlet ports are respectively communicated with the first water outlet pipe and the second water outlet pipe through a communicating pipe.

[0014] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0015] 1. Through the setting of the first clamping unit, the tool body is inserted between the two first clamping blocks. Under the elastic force of the first spring, the first guiding block moves in the direction of the first guiding rod, and the first clamping block clamps the tool body. Under the elastic force of the second spring, the second clamping block and the first clamping block cooperate. Under the cooperation of the first inclined surface and the second inclined surface, the second clamping block drives the first clamping block to clamp the tool body more stably;

[0016] 2. Through the setting of the second clamping unit, when the pressing block contacts the third clamping block, the pressing block drives the third clamping block to move towards the tool body and compresses the third spring. The third clamping block clamps the side surface of the tool body to further ensure the stability of the tool body;

[0017] 3. Through the setting of the cooling unit, the external output mechanism transports the coolant to the positions of the first water outlet pipe and the second water outlet pipe through the annular connecting pipe for output. Specifically, as the first rotating shaft rotates, it drives the second connecting plate to rotate, drives the rotating ring to rotate, and the adjusting block on the rotating ring also rotates accordingly. When the third inclined surface contacts the adjusting plate and drives the moving block to move, the third water outlet pipe is connected to the upper water inlet provided on the adjusting block. At this time, the coolant is communicated with the first water outlet pipe through the communicating pipe to cool the tool body. When the adjusting block does not contact the adjusting plate, the moving block is at the lower end position of the connecting frame body under the elastic force of the fourth spring. The third water outlet pipe is connected to the lower water inlet provided on the adjusting block. The coolant is communicated with the second water outlet pipe through the communicating pipe and rushes towards the tool body, giving an outward impact force to the tool body, which is convenient for the user to replace the tool body. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of a machine tool turret provided by the present invention that facilitates tool replacement Figure 1 ;

[0019] Figure 2 is Figure 1 an enlarged schematic diagram of the structure at position A in

[0020] Figure 3 It is a schematic diagram of the overall structure of a machine tool turret provided by the present invention that facilitates tool replacement Figure 2 ;

[0021] Figure 4 is Figure 3 an enlarged schematic diagram of the structure at position B in

[0022] Figure 5 It is a schematic diagram of the structure of the first clamping block in a machine tool turret provided by the present invention that facilitates tool replacement

[0023] Figure 6 It is a partial schematic diagram of the structure of the cooling unit in a machine tool turret provided by the present invention that facilitates tool replacement

[0024] Figure 7 It is a schematic diagram of the structure in which the second guiding block and the second clamping groove in a machine tool turret provided by the present invention are clamped

[0025] Figure 8 It is a cross-sectional schematic diagram of the adjusting block in a machine tool turret provided by the present invention that facilitates tool replacement

[0026] Annotation of reference numerals: 1, main connecting plate; 2, rotating motor; 3, first rotating shaft; 4, first connecting plate; 5, second connecting plate; 6, first clamping block; 7, first guiding block; 8, first clamping groove; 9, first guiding rod; 10, first spring; 11, second guiding rod; 12, pressing plate; 13, second clamping block; 14, first inclined surface; 15, second inclined surface; 16, second spring; 17, first curved surface; 18, third connecting plate; 19, through groove; 20, third clamping block; 21, second guiding block; 22, second clamping groove; 23, third spring; 24, pressing block; 25, second curved surface; 26, third curved surface; 27, first water outlet pipe; 28, cooling port; 29, first connecting pipe; 30, second water outlet pipe; 31, adjusting box body; 32, annular connecting pipe; 33, rotating ring; 34, second connecting rod; 35, adjusting block; 36, third inclined surface; 37, connecting frame body; 38, third guiding rod; 39, moving block; 40, third water outlet pipe; 41, adjusting plate; 42, fourth spring; 43, connecting hose; 44, water outlet; 45, water inlet; 46, communicating pipe; 47, tool body Detailed implementation manners

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.

[0028] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] An embodiment of the present invention provides a machine tool turret that facilitates tool replacement, as Figures 1-8 shown, including a main connection plate 1, the main connection plate 1 is connected to an external device, a rotation motor 2 is fixedly connected to the main connection plate 1, an output end of the rotation motor 2 is fixedly connected to a first rotating shaft 3, a first connection plate 4 is fixedly connected to a side surface of the first rotating shaft 3, a first clamping unit for clamping a tool body 47 is arranged on the first connection plate 4, a second connection plate 5 is fixedly connected to the side surface of the first rotating shaft 3, and a second clamping unit for clamping the tool body 47 is arranged on the second connection plate 5.

[0030] When the above device is actually used, the rotation of the rotation motor 2 drives the rotation of the first rotating shaft 3, which can drive the tool body 47 clamped on the first connection plate 4 and the second connection plate 5 to rotate so as to replace the tool body 47, and when replacing the tool body 47, it will not affect the machining of the machine tool. The settings of the first clamping unit and the second clamping unit can stably clamp different tool bodies 47.

[0031] In combination with Figure 4 , Figure 5 and Figure 7, the first clamping unit includes two first clamping blocks 6 symmetrically arranged. A first guiding block 7 is fixedly connected to the side surface of the first clamping block 6. Symmetrically arranged first clamping grooves 8 are formed on the first connecting plate 4. A first guiding rod 9 is fixedly connected in the first clamping groove 8. The first guiding block 7 is sleeved outside the first guiding rod 9. The side surface of the first guiding block 7 is connected to the side surface of the first clamping groove 8 through a first spring 10 for providing elastic force. The first spring 10 is sleeved outside the first guiding rod 9.

[0032] Two groups of second guiding rods 11 are fixedly connected between the first connecting plate 4 and the second connecting plate 5 symmetrically. A pressing plate 12 is sleeved outside each second guiding rod 11. A second clamping block 13 is fixedly connected to the side surface of the pressing plate 12. A first inclined surface 14 is arranged on the first clamping block 6. A second inclined surface 15 is arranged on the second clamping block 13. The side surface of the second clamping block 13 is connected to the side surface of the second connecting plate 5 through a second spring 16 for providing elastic force. The second spring 16 is sleeved outside the second guiding rod 11.

[0033] A first curved surface 17 is arranged on the side surface of the first clamping block 6.

[0034] When the above first clamping unit is actually used, the tool body 47 is inserted between the two first clamping blocks 6. Under the elastic force of the first spring 10, the first guiding block 7 moves in the direction of the first guiding rod 9, and the first clamping block 6 clamps the tool body 47. Under the elastic force of the second spring 16, the second clamping block 13 and the first clamping block 6 cooperate. Under the cooperation of the first inclined surface 14 and the second inclined surface 15, the second clamping block 13 drives the first clamping block 6 to clamp the tool body 47 more stably.

[0035] A third connecting plate 18 is fixedly connected to the main connecting plate 1. A through groove 19 is formed on the third connecting plate 18.

[0036] The second clamping unit includes a third clamping block 20 inserted on the second connecting plate 5. A second guiding block 21 is fixedly connected to the side surface of the third clamping block 20. A second clamping groove 22 cooperating with the second guiding block 21 is formed on the second connecting plate 5. The side surface of the second guiding block 21 is connected to the side surface of the second clamping groove 22 through a third spring 23 for providing elastic force. A pressing block 24 is fixedly connected to the side surface of the third connecting plate 18. A second curved surface 25 is arranged on the side surface of the third clamping block 20. A third curved surface 26 is arranged on the side surface of the pressing block 24.

[0037] When the second clamping unit is actually used, when the pressing block 24 contacts the third clamping block 20, the pressing block 24 drives the third clamping block 20 to move towards the tool body 47 and compresses the third spring 23. The third clamping block 20 clamps the side surface of the tool body 47 to further ensure the stability of the tool body 47.

[0038] A cooling unit for cooling the tool body 47 is provided on the main connecting plate 1.

[0039] Combined Figure 6 and Figure 8 , the cooling unit includes symmetrically arranged first water outlet pipes 27 fixedly connected to the main connecting plate 1. Cooling ports 28 are provided on the first water outlet pipes 27. The side surface of the second connecting plate 5 is fixedly connected to a second water outlet pipe 30 through a first connecting pipe 29. The second water outlet pipe 30 contacts the side wall of the tool body 47. The first water outlet pipe 27 is fixedly connected to an adjustment box body 31. An annular connecting pipe 32 is fixedly connected to the main connecting plate 1. The annular connecting pipe 32 is connected to an external output mechanism. The annular connecting pipe 32 is connected to the adjustment box body 31 through an adjustment unit.

[0040] The adjustment unit includes a rotating ring 33. The rotating ring 33 is fixedly connected to the second connecting plate 5 through a second connecting rod 34. An adjustment block 35 is fixedly connected to the side surface of the rotating ring 33. Symmetrically arranged third inclined surfaces 36 are provided on the adjustment block 35. A connecting frame body 37 is fixedly connected to the side surface of the annular connecting pipe 32. A third guide rod 38 is fixedly connected to the connecting frame body 37. A moving block 39 is sleeved on the outer side of the third guide rod 38. A third water outlet pipe 40 is fixedly connected to the side surface of the moving block 39. An adjustment plate 41 is fixedly connected to the side surface of the moving block 39. The side surface of the moving block 39 is connected to the side wall of the connecting frame through a fourth spring 42 for providing elastic force. The fourth spring 42 is sleeved on the outer side of the third guide rod 38. The moving block 39 is connected to the annular connecting pipe 32 through a connecting hose 43 in a through manner. Two water outlet ports 44 are provided on the third water outlet pipe 40. Two water inlet ports 45 are provided on the adjustment box body 31. The water inlet ports 45 are respectively communicated with the first water outlet pipe 27 and the second water outlet pipe 30 through a communicating pipe 46.

[0041] When the above cooling unit is actually in use, the external output mechanism transports the coolant through the annular connecting pipe 32 to the positions of the first water outlet pipe 27 and the second water outlet pipe 30 for output. Specifically, as the first rotating shaft 3 rotates, it drives the second connecting plate 5 to rotate, drives the rotating ring 33 to rotate, and the adjusting block 35 on the rotating ring 33 also rotates accordingly. When the third inclined surface 36 contacts the adjusting plate 41 and drives the moving block 39 to move, the third water outlet pipe 40 is connected to the water inlet 45 at the upper end provided on the adjusting block 35. At this time, the coolant is communicated with the first water outlet pipe 27 through the connecting pipe 46 to perform a cooling operation on the tool body 47. When the adjusting block 35 does not contact the adjusting plate 41, the moving block 39 is at the lower end position of the connecting frame 37 under the elastic force of the fourth spring 42, and the third water outlet pipe 40 is connected to the water inlet 45 at the lower end provided on the adjusting block 35. The coolant is communicated with the second water outlet pipe 30 through the connecting pipe 46 and rushes towards the tool body 47, giving an outward impact force to the tool body 47, which is convenient for the user to replace the tool body 47.

[0042] In summary, the working principle of the present invention is as follows: The tool body 47 is inserted between the two first clamping blocks 6. Under the elastic force of the first spring 10, the first guiding block 7 moves in the direction of the first guiding rod 9, and the first clamping block 6 clamps the tool body 47. Under the elastic force of the second spring 16, the second clamping block 13 and the first clamping block 6 cooperate. Under the cooperation of the first inclined surface 14 and the second inclined surface 15, the second clamping block 13 drives the first clamping block 6 to clamp the tool body 47 more stably; when the pressing block 24 contacts the third clamping block 20, the pressing block 24 drives the third clamping block 20 to move towards the tool body 47 and compresses the third spring 23. The third clamping block 20 clamps the side surface of the tool body 47 to further ensure the stability of the tool body 47; the external output mechanism transports the coolant through the annular connecting pipe 32 to the positions of the first water outlet pipe 27 and the second water outlet pipe 30 for output. Specifically, as the first rotating shaft 3 rotates, it drives the second connecting plate 5 to rotate, drives the rotating ring 33 to rotate, and the adjusting block 35 on the rotating ring 33 also rotates accordingly. When the third inclined surface 36 contacts the adjusting plate 41 and drives the moving block 39 to move, the third water outlet pipe 40 is connected to the water inlet 45 at the upper end provided on the adjusting block 35. At this time, the coolant is communicated with the first water outlet pipe 27 through the connecting pipe 46 to perform a cooling operation on the tool body 47. When the adjusting block 35 does not contact the adjusting plate 41, the moving block 39 is at the lower end position of the connecting frame 37 under the elastic force of the fourth spring 42, and the third water outlet pipe 40 is connected to the water inlet 45 at the lower end provided on the adjusting block 35. The coolant is communicated with the second water outlet pipe 30 through the connecting pipe 46 and rushes towards the tool body 47, giving an outward impact force to the tool body 47, which is convenient for the user to replace the tool body 47.

[0043] 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 within the protection scope of the present invention.

Claims

1. A machine tool tool rest that is convenient for tool replacement, characterized in that, It includes a main connecting plate (1) which is connected to an external device. A rotating motor (2) is fixedly connected to the main connecting plate (1). The output end of the rotating motor (2) is fixedly connected to a first rotating shaft (3). A first connecting plate (4) is fixedly connected to the side of the first rotating shaft (3). A first clamping unit for clamping a tool body (47) is arranged on the first connecting plate (4). A second connecting plate (5) is fixedly connected to the side of the first rotating shaft (3). A second clamping unit for clamping the tool body (47) is arranged on the second connecting plate (5).

2. The machine tool tool rest according to claim 1, which is characterized in that, The first clamping unit includes two symmetrically arranged first clamping blocks (6). A first guiding block (7) is fixedly connected to the side of the first clamping block (6). Symmetrically arranged first clamping grooves (8) are formed on the first connecting plate (4). A first guiding rod (9) is fixedly connected in the first clamping groove (8). The first guiding block (7) is sleeved outside the first guiding rod (9). The side of the first guiding block (7) is connected to the side of the first clamping groove (8) by a first spring (10) for providing elastic force. The first spring (10) is sleeved outside the first guiding rod (9).

3. The machine tool tool rest according to claim 2, wherein Two groups of symmetrically arranged second guiding rods (11) are fixedly connected between the first connecting plate (4) and the second connecting plate (5). A pressing plate (12) is sleeved outside each second guiding rod (11). A second clamping block (13) is fixedly connected to the side of the pressing plate (12). A first inclined surface (14) is arranged on the first clamping block (6). A second inclined surface (15) is arranged on the second clamping block (13). The side of the second clamping block (13) is connected to the side of the second connecting plate (5) by a second spring (16) for providing elastic force. The second spring (16) is sleeved outside the second guiding rod (11).

4. The machine tool tool rest as claimed in claim 3, wherein A first curved surface (17) is arranged on the side of the first clamping block (6).

5. The machine tool turret for facilitating tool replacement according to claim 4, wherein, A third connecting plate (18) is fixedly connected to the main connecting plate (1). A through groove (19) is formed on the third connecting plate (18).

6. The machine tool tool rest for facilitating tool replacement according to claim 5, characterized in that, The second clamping unit includes a third clamping block (20) inserted into the second connecting plate (5). A second guiding block (21) is fixedly connected to the side of the third clamping block (20). A second clamping groove (22) cooperating with the second guiding block (21) is formed on the second connecting plate (5). The side of the second guiding block (21) is connected to the side of the second clamping groove (22) by a third spring (23) for providing elastic force. A pressing block (24) is fixedly connected to the side of the third connecting plate (18). A second curved surface (25) is arranged on the side of the third clamping block (20). A third curved surface (26) is arranged on the side of the pressing block (24).

7. The machine tool tool rest according to claim 4, characterized in that, A cooling unit for cooling the tool body (47) is arranged on the main connecting plate (1).

8. The machine tool tool rest according to claim 7, characterized in that, The cooling unit includes symmetrically arranged first water outlet pipes (27) fixedly connected to the main connection plate (1). A cooling port (28) is provided on the first water outlet pipe (27). The side surface of the second connection plate (5) is fixedly connected to a second water outlet pipe (30) through a first connection pipe (29). The second water outlet pipe (30) is in contact with the side wall of the tool body (47). The first water outlet pipe (27) is fixedly connected to an adjustment box body (31). An annular connection pipe (32) is fixedly connected to the main connection plate (1). The annular connection pipe (32) is connected to an external output mechanism. The annular connection pipe (32) is connected to the adjustment box body (31) through an adjustment unit.

9. The tool rest of a machine tool facilitating tool replacement according to claim 8, characterized in that, The adjustment unit includes a rotating ring (33). The rotating ring (33) is fixedly connected to the second connection plate (5) through a second connecting rod (34). An adjustment block (35) is fixedly connected to the side surface of the rotating ring (33). Symmetrically arranged third inclined surfaces (36) are provided on the adjustment block (35). A connection frame body (37) is fixedly connected to the side surface of the annular connection pipe (32). A third guide rod (38) is fixedly connected to the connection frame body (37). A moving block (39) is sleeved on the outside of the third guide rod (38). A third water outlet pipe (40) is fixedly connected to the side surface of the moving block (39). An adjustment plate (41) is fixedly connected to the side surface of the moving block (39). The side surface of the moving block (39) is connected to the side wall of the connection frame through a fourth spring (42) for providing elastic force. The fourth spring (42) is sleeved on the outside of the third guide rod (38). The moving block (39) is connected to the annular connection pipe (32) through a connection hose (43) in a through manner. Two water outlet ports (44) are provided on the third water outlet pipe (40). Two water inlet ports (45) are provided on the adjustment box body (31). The water inlet ports (45) are respectively communicated with the first water outlet pipe (27) and the second water outlet pipe (30) through a communication pipeline (46).

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