Lithium battery liquid injection device

Abstract

The invention provides a lithium battery liquid injection device, and relates to the field of lithium battery manufacturing equipment.The lithium battery liquid injection device comprises an injection platform, a battery positioning frame is supported and placed at the top end of the injection platform, and a plurality of rows of cylindrical lithium batteries are installed on the battery positioning frame in an inserted mode; two sliding limiting frames are symmetrically welded to the left side and the right side of the filling platform, a longitudinal sliding groove is formed in the top end of each sliding limiting frame, and a row of vertical rail grooves are welded and hoisted to the bottom of each longitudinal sliding groove at equal intervals. A liquid distribution frame is slidably mounted in longitudinal sliding grooves in the top ends of the two sliding limiting frames, after liquid injection is completed, a row of filling pipes slide upwards, and after a row of bottom plates are separated from the lithium battery, springs on sliding rods can push and drive the bottom plates, mounting sleeves and sponge barrels to slide downwards to be separated from the filling pipes; in the process, the sponge barrel can automatically and timely wipe residues on the tail end part of the filling pipe, and compared with the prior art, corrosion and subsequent cleaning troubles can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery manufacturing equipment, and in particular to a lithium battery liquid injection device. Background Art

[0002] Lithium battery electrolyte is the carrier of ion transmission in the battery, generally composed of lithium salt and organic solvent. The electrolyte plays the role of conducting ions between the positive and negative electrodes of the lithium battery, and is the guarantee for the lithium-ion battery to obtain advantages such as high voltage and high specific energy. During the production process of lithium batteries, battery liquid injection devices are used to inject them.

[0003] After a filling is completed, the bottom side of the filling pipe on the existing liquid filling device is easy to contact with the fully loaded liquid in the battery to cause sticky residue, and the bottom side of the filling pipe near the filling port is also easy to produce residue after the supply of electrolyte is cut off. Most of these residual liquids cannot be cleaned up in a timely and effective manner, and will directly drip randomly and disorderly on the surface of the device or the surface of the battery shell, which will not only cause corrosion but also bring troubles to subsequent cleaning. Summary of the invention

[0004] In view of this, the present invention provides a lithium battery filling device to solve the problem that after a filling is completed, the bottom side of the filling tube is easily in contact with the liquid fully loaded in the battery to cause sticky residue, and the bottom side of the filling tube near the filling port is also prone to residue after the supply of electrolyte is cut off. Most of these residual liquids cannot be cleaned up in a timely and effective manner, and will directly drip randomly and disorderly on the surface of the device or the surface of the battery shell, which will not only cause corrosion but also require troublesome subsequent cleaning.

[0005] The present invention provides a lithium battery liquid injection device, which specifically comprises: a filling platform, a battery positioning frame is supported and placed on the top of the filling platform, and a plurality of rows of cylindrical lithium batteries are inserted and installed on the battery positioning frame; two sliding limit frames are symmetrically welded on the left and right sides of the filling platform, the sliding limit frame is an overall U-shaped structure, and a longitudinal slide groove is opened on the top part of the sliding limit frame, and a row of vertical track grooves are welded and hoisted at equal intervals at the bottom of the longitudinal slide groove; a liquid distribution frame is slidably installed in the longitudinal slide groove at the top of the two sliding limit frames, and the liquid distribution frame as a whole is composed of a top transverse water distribution pipe and a liquid distribution frame welded at equal intervals at the bottom of the transverse water distribution pipe. The battery is composed of a row of filling pipes at the bottom, wherein a row of limiting rings are welded on the lower half of one of the filling pipes, and two protruding support plates are symmetrically welded on the limiting rings, and a circular structure mounting sleeve is slidably installed on the head ends of the two protruding support plates; a circular structure bottom plate is welded at the bottom of the mounting sleeve, a through hole is penetrated through the bottom plate, and a sponge tube is embedded in the inside of the mounting sleeve; when filling and using, the bottom section of the filling pipe slides down, passes through the sponge tube and the through hole, and is inserted into the inside of the lithium battery; two upward supporting sliding rods are symmetrically welded on the circumferential outer ring of the bottom plate, and the sliding rods are pushed by springs and slide in cooperation with the protruding support plates.

[0006] Furthermore, six vertical ear blocks are symmetrically welded on the left and right sides of the filling platform, among which four horizontal positioning shafts are symmetrically penetrated and slid through the front and rear vertical ear blocks, and two threaded push rods are symmetrically penetrated and screwed on the two middle vertical ear blocks.

[0007] Furthermore, two clamping plates are symmetrically welded to the head ends of the four transverse positioning shafts, and the head ends of the two threaded push rods are rotatably connected to the middle parts of the two clamping plates, and the two clamping plates are used to clamp and fix the battery positioning frame in the center.

[0008] Furthermore, the battery positioning frame as a whole is composed of a bottom support plate and a horizontal positioning plate supported at intervals on the top of the bottom support plate, and multiple rows of sockets are correspondingly provided on the horizontal positioning plate and the bottom support plate, and the lithium batteries are inserted into the sockets.

[0009] Furthermore, two blocks are symmetrically welded at the left and right ends of the horizontal water distribution pipe, and four limit plates are symmetrically welded at both ends of the two blocks, wherein the four limit plates are respectively attached to the left and right sides of the sliding limit frame, and the two blocks correspond to the two longitudinal sliding grooves and two rows of vertical rail grooves for sliding cooperation.

[0010] Furthermore, the top threaded plug cover of the mounting sleeve has an upper cover of an annular mechanism, the limit ring slides downward and abuts against the upper cover, and the bottom plate slides downward and abuts against the top opening of the lithium battery, and a rubber sealing ring is embedded in the through hole of the bottom plate.

[0011] Furthermore, a water inlet pipe is fixed on the vertical support of the middle section of the horizontal water distribution pipe, and an electric pump is threadedly installed on the water inlet pipe. The electric pump is connected to an external battery liquid storage container through a hose, and the electric pump is electrically connected to a time relay.

[0012] Furthermore, two protruding handles are symmetrically welded on the left and right limit plates, and two push switches are symmetrically installed at the head ends of the two protruding handles. The two push switches are electrically connected to the time relays accordingly.

[0013] Furthermore, two ground-contacting support frames are symmetrically welded on the left and right sides of the bottom of the filling platform. The filling platform has a rectangular structure, and the bottom support plate and the horizontal positioning plate also have rectangular structures.

[0014] Furthermore, the longitudinal slide groove is connected to a row of vertical track grooves welded and hoisted at equidistant intervals at its bottom, and the longitudinal slide groove is connected to the row of vertical track grooves to form a detour slide groove with continuous "I" curves. The liquid distribution rack can move horizontally back and forth and slide up and down multiple times along the two detour slide grooves with continuous "I" curves to add battery liquid to the multiple rows of lithium batteries on the battery positioning rack, and the left and right rows of vertical track grooves and the multiple rows of lithium batteries are located on the same reference line in the left and right directions. Therefore, when the liquid distribution rack and a row of filling pipes slide down the vertical track grooves, they can be aligned and plugged with the lithium batteries arranged in a row, eliminating the trouble of manual calibration every time they move down for filling.

[0015] The beneficial effects are: 1. In the present invention, after the liquid injection is completed, a row of filling tubes slide upwards, and when a row of bottom plates are separated from the lithium battery, the spring on the slide rod can push and drive the bottom plate, the mounting sleeve and the sponge tube to slide downwards and separate from the filling tube. In this process, the sponge tube can automatically and timely wipe the residue on the tail end of the filling tube. Compared with the prior art, it can avoid that the residual liquid at the tail end of the filling tube cannot be cleaned in time and effectively, and directly randomly and disorderly drips on the surface of the device or the surface of the battery shell, causing corrosion and subsequent cleaning troubles. In addition, when filling, a row of bottom plates are first abutted and sealed against the top opening of the lithium battery, which can avoid the filling liquid from overflowing when fully loaded or shaking and spilling everywhere, and the rubber sealing ring is used to seal the sliding gap between the filling tube and the bottom plate to ensure the sealing of the bottom plate to the top opening of the lithium battery when filling.

[0016] 2. In the present invention, the liquid distribution rack can move horizontally forward and backward and slide up and down multiple times along two continuous "J"-shaped curved circuitous slide grooves to add battery liquid to multiple rows of lithium batteries on the battery positioning rack, and the left and right rows of vertical track grooves and the multiple rows of lithium batteries are located on the same reference line in the left and right directions. Then, when the liquid distribution rack and a row of filling pipes slide down along the vertical track grooves, they can be aligned and plugged with the lithium batteries arranged in a row, eliminating the trouble of manual calibration every time they move down for filling.

[0017] 3. In the present invention, the time relay controls the electric pump to start and then stop after a period of time. The time relay can be used to adjust the length of the electric pump start-up time to achieve accurate increase or decrease adjustment of the filling flow of the liquid distribution rack, which is suitable for the filling requirements of different batteries with different filling amounts. The electric pump starts once each time the switch is pressed at any point. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture: Figure 1 is a schematic diagram of the overall front structure of an embodiment of the present invention; Figure 2 is a schematic diagram of the overall rear side structure of an embodiment of the present invention; Figure 3 is a schematic structural diagram of a battery positioning frame according to an embodiment of the present invention; Figure 4 is a schematic diagram of the structure of a horizontal positioning plate in an embodiment of the present invention; Figure 5 is a schematic structural diagram of a sliding limit frame according to an embodiment of the present invention; Figure 6 is a schematic structural diagram of a liquid distribution rack according to an embodiment of the present invention; Figure 7 is a schematic diagram of the installation sleeve structure of an embodiment of the present invention; Figure 8 is a schematic diagram of the inner side structure of a half-section of a mounting sleeve according to an embodiment of the present invention; Fig. 9 It is a schematic diagram of the half-section bottom structure of the installation sleeve of an embodiment of the present invention.

[0021] Reference numerals list 1. Filling platform; 101. Horizontal positioning shaft; 102. Threaded push rod; 103. Clamp; 2. Battery positioning frame; 201. Horizontal positioning plate; 3. Lithium battery; 4. Sliding limit frame; 401. Vertical track groove; 5. Liquid distribution frame; 501. Filling pipe; 502. Limit plate; 503. Block; 504. Limit ring; 6. Push switch; 7. Electric pump; 8. Mounting sleeve; 801. Bottom plate; 802. Sliding rod; 803. Upper cover; 804. Sponge tube; 805. Rubber sealing ring. DETAILED DESCRIPTION

[0022] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0023] Example: Please refer to Figures 1 to 9 As shown: The present invention provides a lithium battery liquid injection device, comprising a filling platform 1, a battery positioning frame 2 is supported and placed on the top of the filling platform 1, and multiple rows of cylindrical lithium batteries 3 are inserted and installed on the battery positioning frame 2; two sliding limit frames 4 are symmetrically welded on the left and right sides of the filling platform 1, the sliding limit frame 4 is a U-shaped structure as a whole, and a longitudinal slide groove is opened on the top part of the sliding limit frame 4, and a row of vertical track grooves 401 are welded and hoisted at equal intervals at the bottom of the longitudinal slide groove; a liquid distribution frame 5 is slidably installed in the longitudinal slide groove at the top of the two sliding limit frames 4, and the liquid distribution frame 5 is composed of a top horizontal water distribution pipe and a row of filling pipes 501 welded at equal intervals at the bottom of the horizontal water distribution pipe. A row of limiting rings 504 are welded and sleeved on the lower half of the middle row of filling pipes 501, and two protruding support plates are symmetrically welded on the limiting rings 504, and a circular structure mounting sleeve 8 is slidably installed on the head ends of the two protruding support plates; a circular structure bottom plate 801 is welded on the bottom of the mounting sleeve 8, a through hole is penetrated on the bottom plate 801, and a sponge tube 804 is embedded in the inside of the mounting sleeve 8; when filling and using, the bottom section of the filling pipe 501 slides down, passes through the sponge tube 804 and the through hole, and is inserted into the interior of the lithium battery 3; two upward supporting sliding rods 802 are symmetrically welded on the circumferential outer ring of the bottom plate 801, and the sliding rods 802 are slidably matched with the protruding support plates through spring pushing.

[0024] Among them, six vertical ear blocks are symmetrically welded on the left and right sides of the filling platform 1, among which four horizontal positioning shafts 101 are symmetrically penetrated and slid through the front and rear four vertical ear blocks, and two threaded push rods 102 are symmetrically penetrated and screwed and installed on the two middle vertical ear blocks.

[0025] Among them, two clamping plates 103 are symmetrically welded to the head ends of the four transverse positioning shafts 101, and the head ends of the two threaded push rods 102 are rotatably connected to the middle parts of the two clamping plates 103, and the two clamping plates 103 are used to clamp and fix the battery positioning frame 2 in the center.

[0026] The battery positioning frame 2 as a whole is composed of a bottom support plate and a horizontal positioning plate 201 supported at intervals on the top of the bottom support plate, and multiple rows of sockets are correspondingly provided on the horizontal positioning plate 201 and the bottom support plate, and the lithium batteries 3 are inserted into the sockets.

[0027] Among them, two blocks 503 are symmetrically welded at the left and right ends of the horizontal water distribution pipe, and four limit plates 502 are symmetrically welded at the two ends of the two blocks 503, wherein the four limit plates 502 are respectively attached to the left and right sides of the sliding limit frame 4, and the two blocks 503 correspond to the two longitudinal sliding grooves and two rows of vertical rail grooves 401 for sliding cooperation.

[0028] Among them, the top threaded plug cover of the installation sleeve 8 has an upper cover 803 of an annular mechanism, the limit ring 504 slides downward and abuts on the upper cover 803, and the bottom plate 801 slides downward and abuts on the top opening of the lithium battery 3. A rubber sealing ring 805 is embedded in the perforation of the bottom plate 801. When a row of filling tubes 501 slide down and are plugged into a row of lithium batteries 3 for liquid injection, a row of bottom plates 801 first abut against the top opening of the lithium battery 3 and are pushed back to slide upward. The upward sliding of a row of bottom plates 801 can drive a row of sponge tubes 804 to be inserted into a row of filling tubes 501, and as the sliding action continues, the bottom section of the filling tube 501 slides down through the perforation on the bottom plate 801 and extends into the interior of the lithium battery 3. At this time, the press switch 6 is clicked to control the electric pump 7 to start injecting liquid into the lithium battery 3. After the injection is completed, a row of filling tubes 501 slides upward. When a row of bottom plates 801 are separated from the lithium battery 3, the spring on the slide bar 802 can push and drive the bottom plate 801, the mounting sleeve 8 and the sponge tube 804 to slide downward and separate from the filling pipe 501. During this process, the sponge tube 804 can automatically and timely wipe the residue on the tail end of the filling pipe 501. Compared with the prior art, it can avoid the residual liquid at the tail end of the filling pipe 501 from not being cleaned in a timely and effective manner, and directly randomly and disorderly dripping on the surface of the device or the surface of the battery shell, causing corrosion and subsequent cleaning troubles. In addition, during filling, a row of bottom plates 801 is first abutted and sealed against the top opening of the lithium battery 3 to avoid overflow of the filling liquid due to full load or shaking, and scattering everywhere, and the rubber sealing ring 805 seals the sliding gap between the filling pipe 501 and the bottom plate 801 to ensure the sealing of the bottom plate 801 to the top opening of the lithium battery 3 during filling.

[0029] Among them, a water inlet pipe is fixed on the vertical support of the middle section of the horizontal water distribution pipe, and an electric pump 7 is threadedly installed on the water inlet pipe. The electric pump 7 is connected to an external battery liquid storage container through a hose, and the electric pump 7 is electrically connected to a time relay. The electric pump 7 can suck and transport the external battery liquid to the liquid distribution rack 5 and a row of filling pipes 501 for filling.

[0030] Among them, two protruding handles are symmetrically welded on the left and right limit plates 502, and two push switches 6 are symmetrically installed at the head ends of the two protruding handles. The two push switches 6 are electrically connected to the time relays respectively. The time relay controls the electric pump 7 to start and then stop after a period of time. The start time of the electric pump 7 can be adjusted by the time relay to achieve accurate increase or decrease adjustment of the filling flow of the liquid distribution rack 5, and each time any push switch 6 is pressed, the electric pump 7 is started once.

[0031] Among them, two ground-contacting support frames are symmetrically welded on the left and right sides of the bottom of the filling platform 1. The filling platform 1 is a rectangular structure, and the bottom support plate and the horizontal positioning plate 201 are also rectangular structures.

[0032] Among them, the longitudinal slide is connected with a row of vertical track grooves 401 welded and hoisted at equal intervals at its bottom, and the longitudinal slide is connected with the row of vertical track grooves 401 to form a circuitous slide with continuous "I"-shaped bends. The liquid distribution rack 5 can move horizontally back and forth and slide up and down multiple times along the two continuous "I"-shaped bends to add battery liquid to the multiple rows of lithium batteries 3 on the battery positioning rack 2, and the left and right rows of vertical track grooves 401 and the multiple rows of lithium batteries 3 are located on the same reference line in the left and right directions. Therefore, when the liquid distribution rack 5 and the row of filling pipes 501 slide down along the vertical track grooves 401, they can be aligned and plugged with the lithium batteries 3 arranged in a row, eliminating the trouble of manual calibration every time they move down for filling.

[0033] Specific usage and function of this embodiment: In the present invention, the electric pump 7 can suck and transport the external battery liquid to the liquid distribution rack 5 and a row of filling pipes 501 for filling. The time relay controls the electric pump 7 to start for a period of time and then stop. The start time of the electric pump 7 can be adjusted by the time relay to achieve accurate increase or decrease adjustment of the filling flow of the liquid distribution rack 5, and each time the switch 6 is pressed at any point, the electric pump 7 is started once; The liquid distribution rack 5 can move horizontally forward and backward and slide up and down multiple times along two continuous roundabout slide grooves that are bent in a "F" shape, so as to add battery liquid to the multiple rows of lithium batteries 3 on the battery positioning rack 2, and the left and right rows of vertical track grooves 401 and the multiple rows of lithium batteries 3 are located on the same reference line in the left and right direction, so that the liquid distribution rack 5 and a row of filling pipes 501 can be aligned and plugged with the lithium batteries 3 arranged in a row when sliding down the vertical track grooves 401; When a row of filling tubes 501 slide down and connect with a row of lithium batteries 3 for filling, a row of bottom plates 801 first come into contact with the top openings of the lithium batteries 3 and are pushed back to slide upward. The upward sliding of a row of bottom plates 801 can drive a row of sponge tubes 804 to fit with a row of filling tubes 501, and as the sliding movement continues, the bottom section of the filling tube 501 slides down through the perforation on the bottom plate 801 and is inserted into the interior of the lithium battery 3. At this time, the switch 6 is clicked to control the electric pump 7 to start filling the lithium battery 3. After the filling is completed, the row of filling tubes 501 slides upward. When the row of bottom plates 801 is separated from the lithium batteries 3, the spring on the slide bar 802 can push and drive the bottom plate 801, the mounting sleeve 8 and the sponge tube 80 4 slides downward and separates from the filling pipe 501. During this process, the sponge tube 804 can automatically and timely wipe the residue on the tail end of the filling pipe 501. Compared with the prior art, it can avoid that the residual liquid at the tail end of the filling pipe 501 cannot be cleaned in time and effectively, and directly randomly and disorderly drips on the surface of the device or the surface of the battery shell, causing corrosion and subsequent cleaning troubles. In addition, when filling, a row of bottom plates 801 first abuts against and blocks the top opening of the lithium battery 3, which can prevent the filling liquid from overflowing when fully loaded or shaking and scattering everywhere, and the rubber sealing ring 805 seals the sliding gap between the filling pipe 501 and the bottom plate 801 to ensure the sealing of the bottom plate 801 to the top opening of the lithium battery 3 when filling.

Claims

1. A lithium battery injection device, characterized in that: The invention comprises a filling platform (1), wherein a battery positioning frame (2) is supported and placed at the top of the filling platform (1), and a plurality of rows of cylindrical lithium batteries (3) are inserted and installed on the battery positioning frame (2); two sliding limit frames (4) are symmetrically welded on the left and right sides of the filling platform (1), and the sliding limit frames (4) are in a U-shaped structure as a whole, and a longitudinal slide groove is opened on the top part of the sliding limit frame (4), and a row of vertical track grooves (401) are welded and hoisted at equal intervals at the bottom of the longitudinal slide groove; a liquid distribution frame (5) is slidably installed in the longitudinal slide groove at the top of the two sliding limit frames (4), and the liquid distribution frame (5) is composed of a top transverse water distribution pipe and a row of filling pipes (501) welded at equal intervals at the bottom of the transverse water distribution pipe, wherein one row of filling pipes ( A row of limit rings (504) are welded onto the lower half of the battery (501), two protruding support plates are symmetrically welded onto the limit rings (504), and a circular mounting sleeve (8) is slidably mounted on the head ends of the two protruding support plates; a circular bottom plate (801) is welded onto the bottom of the mounting sleeve (8), a through hole is penetrated through the bottom plate (801), and a sponge tube (804) is embedded in the mounting sleeve (8); when filling, the bottom section of the filling pipe (501) slides down through the sponge tube (804) and the through hole to be inserted into the interior of the lithium battery (3); two upwardly supporting sliding rods (802) are symmetrically welded onto the circumferential outer ring of the bottom plate (801), and the sliding rods (802) are slidably matched with the protruding support plates through spring pushing.

2. A lithium battery injection device as claimed in claim 1, characterized in that: Six vertical ear blocks are symmetrically welded on the left and right sides of the filling platform (1), wherein four horizontal positioning shafts (101) are symmetrically penetrated and slidably penetrated through the four front and rear vertical ear blocks, and two threaded push rods (102) are symmetrically penetrated and screwed and installed on the two middle vertical ear blocks.

3. A lithium battery injection device as claimed in claim 2, characterized in that: Two clamping plates (103) are symmetrically welded to the head ends of the four transverse positioning shafts (101), and the head ends of the two threaded push rods (102) are rotatably connected to the middle parts of the two clamping plates (103) respectively. The two clamping plates (103) are used to clamp and fix the battery positioning frame (2) in the center.

4. A lithium battery injection device as claimed in claim 1, characterized in that: The battery positioning frame (2) as a whole is composed of a bottom support plate and a horizontal positioning plate (201) supported at intervals on the top of the bottom support plate, and the horizontal positioning plate (201) and the bottom support plate are both provided with a plurality of rows of sockets correspondingly, and the lithium batteries (3) are inserted into the sockets.

5. A lithium battery injection device as claimed in claim 1, characterized in that: Two blocks (503) are symmetrically welded at the left and right ends of the horizontal water distribution pipe, and four limit plates (502) are symmetrically welded at the two ends of the two blocks (503), wherein the four limit plates (502) are respectively attached to the left and right sides of the sliding limit frame (4), and the two blocks (503) are slidably matched with two longitudinal slide grooves and two rows of vertical track grooves (401).

6. A lithium battery injection device as claimed in claim 1, characterized in that: The top threaded plug cover of the installation sleeve (8) has an upper cover (803) of an annular structure, the limit ring (504) slides downward to abut against the upper cover (803), and the bottom plate (801) slides downward to abut against the top opening of the lithium battery (3), and a rubber sealing ring (805) is embedded in the through hole of the bottom plate (801).

7. A lithium battery injection device as claimed in claim 1, characterized in that: A water inlet pipe is fixed to the vertical support on the middle section of the horizontal water distribution pipe, and an electric pump (7) is threadedly mounted on the water inlet pipe. The electric pump (7) is connected to an external battery liquid storage container via a hose, and the electric pump (7) is electrically connected to a time relay.

8. A lithium battery injection device as claimed in claim 7, characterized in that: Two protruding handles are symmetrically welded on the left and right limit plates (502), and two push switches (6) are symmetrically installed at the head ends of the two protruding handles. The two push switches (6) are electrically connected to the time relays respectively.

9. A lithium battery injection device as claimed in claim 4, characterized in that: Two ground-contacting support frames are symmetrically welded on the left and right sides of the bottom of the filling platform (1); the filling platform (1) is a rectangular structure, and the bottom support plate and the horizontal positioning plate (201) are also rectangular structures.

10. A lithium battery injection device as claimed in claim 1, characterized in that: The longitudinal chute is connected to a row of vertical track grooves (401) welded and hoisted at equal intervals at its bottom, and the longitudinal chute and the row of vertical track grooves (401) are connected to form a continuous "X"-shaped curved circuitous chute.

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