High-efficiency integrated numerical control constant-flow liquid injection pump

Abstract

The application discloses a kind of high-efficiency integrated numerical control constant-flow liquid injection pumps, including pump cover, its inside is equipped with independent liquid outlet passage and liquid inlet passage, the bottom surface of pump cover is equipped with two first installation holes and two second installation holes, each first installation hole is fixedly installed with liquid outlet check valve, each second installation hole is fixedly installed with liquid inlet check valve;Two bellows, each bellows is cylindrically arranged, two bellows are spaced apart and sealed and fixed on the bottom surface of pump cover, each bellows is communicated with one liquid outlet check valve and one liquid inlet check valve;Driving mechanism, it is used to drive two bellows to stretch in opposite directions in vertical direction, so that one bellows makes compression movement, another bellows makes extension movement, compared with prior art, realize uninterrupted liquid inlet and liquid outlet, so as to improve the working efficiency of liquid injection pump, solve the problem of low working efficiency in the past.

Description

Technical Field

[0001] This invention relates to the field of injection pump technology, and in particular to a high-efficiency integrated CNC constant flow injection pump. Background Technology

[0002] A bellows injection pump, also known as a bellows pump, is mainly used for the transportation of fluids or liquids. It works by using a flexible tube (bellows) to expand and contract, changing the internal volume of the bellows and generating pressure to propel the liquid. It is versatile and reliably stable, and is widely used in various fields such as medical, environmental, and industrial applications.

[0003] Referring to patent document CN2022227105628, a non-electrically operated bellows infusion pump with external liquid contact is disclosed, comprising: a pump head with an inlet channel and an outlet channel; an inlet check valve assembly mounted on the pump head and connected to the inlet end of the inlet channel; an outlet check valve assembly mounted on the pump head and connected to the outlet end of the outlet channel; a bellows fixedly disposed within the pump head, the space between the outer surface of the bellows and the inner surface of the pump head forming the pump chamber, which is connected to both the inlet and outlet channels; and an electrically driven bellows drive unit. The bellows in this infusion pump is essentially a piston. The pump head's volume is changed by the bellows' expansion and contraction within the pump chamber, thus achieving liquid transport. It does not directly use the bellows as a liquid carrier. When transporting corrosive liquids, the pump head is prone to corrosion, resulting in a short service life.

[0004] In addition, in the patent document with application number CN2022227105628, the infusion pump can only dispense or dispense liquid, and cannot dispense and dispense liquid simultaneously. Two sets of infusion pumps are required to achieve simultaneous dispensing and dispensing of liquid. This method has a relatively complex structure, more parts, and the overall volume of the infusion system composed of the infusion pump is large, which increases the failure rate, greatly reduces the working stability, and also increases the maintenance cost, resulting in a complex structure. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a high-efficiency integrated CNC constant flow injection pump, which can solve the problems of complex structure and inability of a single injection pump to simultaneously inject and discharge liquid.

[0006] To address the aforementioned technical problems, this invention discloses a high-efficiency integrated CNC constant flow injection pump, comprising a pump cover with an independent outlet channel and an inlet channel inside. The bottom surface of the pump cover has two spaced-apart first mounting holes communicating with the outlet channel and two spaced-apart second mounting holes communicating with the inlet channel. Each first mounting hole contains a fixed outlet check valve, and each second mounting hole contains a fixed inlet check valve. Two bellows, each cylindrical in shape, are positioned such that their bottom ends form a closed structure, and their top ends form an opening communicating with an internal cavity. The two bellows are spaced apart and sealed to the bottom surface of the pump cover, with each bellows corresponding to one outlet check valve and one inlet check valve. A drive mechanism is used to drive the two bellows to extend and retract in opposite directions in the vertical direction, so that when one bellows compresses, the other bellows extends.

[0007] Each bellows has a mounting section extending outward from its top end, which is then fixed to the bottom surface of the pump cover by screws.

[0008] A sealing gasket is provided between the top surface of the mounting part and the bottom surface of the pump cover.

[0009] This also includes a frame, which is fixedly installed below the pump cover, and the drive mechanism is installed inside the frame.

[0010] The drive mechanism includes a drive motor, a driving pulley, a driven pulley, a synchronous belt, a transmission shaft, a left eccentric pulley, and a right eccentric pulley. The drive motor is fixedly mounted on the inner bottom surface of the frame, the driving pulley is fixedly mounted on the output shaft of the drive motor, the transmission shaft is horizontally arranged and rotatably mounted below two bellows, the left eccentric pulley is fixedly mounted on the left side of the transmission shaft and below one of the bellows, the right eccentric pulley is fixedly mounted on the right side of the transmission shaft and below the other bellows, the driven pulley is fixedly sleeved on the outer circumference of the transmission shaft, and the synchronous belt is sleeved on the outer circumference of the driving pulley and the driven pulley. Both the left and right eccentric pulleys are connected to the bottom of the corresponding bellows through guide components.

[0011] The left eccentric wheel extends outward to form a first connecting part that connects to the guide assembly, and the right eccentric wheel extends outward to form a second connecting part that connects to the guide assembly; the first connecting part and the second connecting part are staggered in the height direction.

[0012] The guide assembly includes a partition that is horizontally fixed inside the frame. The partition has a guide hole and a guide member is provided in the guide hole. The guide member can slide back and forth along the guide hole in the height direction. The top end of the guide member is fixedly connected to the bottom end of the bellows. The bottom end of the guide member is provided with a crank that is connected to the first connecting part or the second connecting part.

[0013] The corrugated pipe extends downwards into a columnar body, and the top of the guide is formed with a sleeve. The columnar body has a first through hole arranged laterally, and the sleeve has a second through hole arranged laterally. In the assembled state, the columnar body is inserted into the sleeve, and the first through hole and the second through hole are aligned in the lateral direction.

[0014] The bottom end of the guide extends downward to form a pair of spaced mounting ears. The top end of the crank is inserted between the pair of mounting ears, and the top end of the crank is hinged to the mounting ears via a hinge. The bottom end of the crank is provided with a bearing. The outer ring of the bearing is fixed to the crank, and the inner ring of the bearing is fixed to the first connecting part or the second connecting part.

[0015] The top surface of the partition has a groove, and the bottom of the partition has a conduit. The top end of the conduit passes through the partition and communicates with the groove, while the bottom end of the conduit extends out of the bottom surface of the frame.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0017] (1) By setting a driving mechanism, the two bellows are driven to extend and retract in opposite directions in the vertical direction, so that the volume in the bellows changes. When the volume increases, it is the liquid suction process, and when the volume decreases, it is the liquid discharge process. Since the two bellows are set to extend and retract in opposite directions, when the volume of one bellows decreases, the volume of the other bellows increases. This ensures that when one bellows is discharging liquid, the other bellows is inlet liquid. This achieves uninterrupted liquid inlet and outlet, ensures constant flow, and improves the working efficiency of the injection pump, thus solving the problem of low working efficiency in the past.

[0018] (2) The corrugated pipe is used as the main carrier of fluid. The overall structure is simple and compact, with high working stability. It is convenient for the maintenance and upkeep of the injection pump. The corrugated pipe can be made of high-strength acid and alkali resistant materials, thereby improving the corrosion resistance and stability of the injection pump and solving the problems of short service life and inability to be used for corrosive liquid transportation in the past.

[0019] (3) In other embodiments, a guide component is used to guide the movement of the bellows, which greatly ensures the accuracy of liquid injection, solves the problem of unstable liquid injection accuracy caused by large shaking during the extension and retraction of the bellows, and further improves the working stability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the injection pump mechanism in the embodiment;

[0022] Figure 2 This is a front view of the injection pump in the embodiment;

[0023] Figure 3 yes Figure 2 Sectional view at point AA;

[0024] Figure 4 yes Figure 2 Sectional view at point BB;

[0025] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 This is a schematic diagram of the structure of the injection pump hidden behind the back plate in the embodiment;

[0027] Figure 7 This is a schematic diagram of the drive mechanism in the embodiment;

[0028] Figure 8 This is an exploded view of the drive mechanism in the embodiment. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or end that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or ends.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] This invention discloses a specific embodiment of a high-efficiency integrated CNC constant flow injection pump, please see [link to embodiment]. Figure 1 The injection pump includes a pump cover 2 and a frame 1. The pump cover 2 is fixedly located on the top of the frame 1, meaning the frame 1 is fixedly installed below the pump cover 2. A touch screen display 11 is fixedly installed on the front of the frame 1, and several connectors 12 for connecting to external devices or a power source are fixedly installed on the sides of the frame 1. It should be noted that a controller may also be installed inside the frame 1, and the controller is electrically connected to electronic components such as the touch screen display 11. Optionally, the frame 1 includes a front panel, a left side panel, a right side panel, a bottom panel, and a back panel. The touch screen display 11 is mounted on the front panel, and the front panel, left side panel, right side panel, bottom panel, and back panel together form a mounting cavity for mounting components.

[0033] Combination Figure 2 and Figure 3 The pump cover 2 has an independent outlet channel 22 and an inlet channel 21 inside. In this embodiment, the outlet of the outlet channel 22 is connected to the right side of the pump cover 2, and the inlet of the inlet channel 21 is connected to the left side of the pump cover 2. The bottom surface of the pump cover 2 has two spaced-apart first mounting holes 24 that communicate with the outlet channel 22 and two spaced-apart second mounting holes 23 that communicate with the inlet channel 21. Figure 4 Only one first mounting hole 24 and one second mounting hole 23 are shown. Each first mounting hole 24 has a liquid outlet check valve 26 fixedly installed inside, and each second mounting hole 23 has a liquid inlet check valve 25 fixedly installed inside. (Combined with...) Figure 4 It should be noted that the top end of the first mounting hole 24 is connected to the liquid outlet channel 22, and the top end of the second mounting hole 23 is also connected to the liquid outlet channel 22. The bottom ends of both the first mounting hole 24 and the second mounting hole 23 are connected to the bottom surface of the pump cover 2. Optionally, threads can be provided on the wall of the first mounting hole 24 or the second mounting hole 23, and a nut 27 with external threads can be screwed into the mounting hole to fix the one-way valve. This one-way valve fixing structure is easy to disassemble and assemble, facilitating subsequent inspection and maintenance.

[0034] Combination Figure 5 and Figure 6Two bellows 3 are fixedly installed on the bottom surface of the pump cover 2. Each bellows 3 is cylindrical, forming a closed structure at its bottom end and an opening at its top that communicates with the internal cavity. The two bellows 3 are spaced apart and sealed to the bottom surface of the pump cover 2. Optionally, each bellows 3 has a mounting part 31 extending outward from its top end. The mounting part 31 is rectangular and has multiple countersunk holes spaced apart, allowing it to be fixed to the bottom surface of the pump cover 2 with screws. To ensure sealing, a sealing gasket 32 ​​is provided between the top surface of the mounting part 31 and the bottom surface of the pump cover 2. It should be noted that the sealing gasket 32, bellows 3, and other components can be made of high-strength, acid- and alkali-resistant materials such as PTFE, high molecular weight UPE, and perfluoroether. This improves the service life of the injection pump and makes it suitable for conveying various corrosive fluids.

[0035] In this embodiment, each bellows 3 is connected to an outlet check valve 26 and an inlet check valve 25, thereby forming two cavities with variable volumes inside the injection pump.

[0036] Combination Figure 7 and Figure 8 The injection pump is equipped with a drive mechanism 7 for driving two bellows 3 to extend and retract in opposite directions in the vertical direction, so that when one bellows 3 performs a compression motion (the internal cavity volume decreases as a compression motion), the other bellows 3 performs an extension motion (the internal cavity volume increases as an extension motion).

[0037] In this embodiment, the drive mechanism 7 includes a drive motor 71, a driving pulley 72, a driven pulley 73, a synchronous belt 74, a transmission shaft 75, a left eccentric pulley 76, a right eccentric pulley 77, and a guide mechanism. The drive motor 71 is fixedly mounted on the inner bottom surface of the frame 1, the driving pulley 72 is fixedly mounted on the output shaft of the drive motor 71, and the transmission shaft 75 is laterally arranged and rotatably mounted below the two bellows 3. Optionally, a hinge seat is formed on the inner bottom surface of the frame 1, and the transmission shaft 75 is fixedly mounted on the hinge seat through a bearing 79, thereby realizing the rotatable mounting of the transmission shaft 75, allowing the transmission shaft 75 to rotate relative to the frame 1.

[0038] As an improvement, the left eccentric wheel 76 is fixedly mounted on the left side of the drive shaft 75 and located below one of the bellows 3, while the right eccentric wheel 77 is fixedly mounted on the right side of the drive shaft 75 and located below the other bellows 3. The driven pulley 73 is fixedly sleeved on the outer circumference of the drive shaft 75, and the synchronous belt 74 is sleeved on the outer circumference of the driving pulley 72 and the driven pulley 73. During operation, the drive motor 71 drives its output shaft to rotate, which in turn drives the driving pulley 72 to rotate. With the assistance of the synchronous belt 74, the driving pulley 72 drives the driven pulley 73 to rotate. Since the driven pulley 73 is relatively fixed to the drive shaft 75, its rotation causes the drive shaft 75 and the left and right eccentric wheels 76 and 77 fixed to both sides of the drive shaft 75 to rotate together. Both the left and right eccentric wheels 76 and 77 are connected to the bottom of their respective bellows 3 via guide components.

[0039] To enable the injection pump to simultaneously dispense and dispense liquid, this embodiment modifies the movement direction of the two bellows 3, causing them to extend and retract in opposite directions under the same drive source (drive motor 71). Specifically, the left eccentric wheel 76 extends outward to form a first connecting portion 761 connected to the guide assembly, and the right eccentric wheel 77 extends outward to form a second connecting portion 771 connected to the guide assembly. It should be noted that the first connecting portion 761 is not on the central axis of the left eccentric wheel 76, and the second connecting portion 771 is not on the central axis of the right eccentric wheel 77. In the assembled state, the first connecting portion 761 and the second connecting portion 771 are staggered in the height direction, meaning they are located on two horizontal planes with different heights. During operation, when the first connecting part 761 rotates to its highest point, the second connecting part 771 rotates to its lowest point. Since the left eccentric wheel 76 and the right eccentric wheel 77 are driven by the same drive shaft 75, when the first connecting part 761 moves to its lowest point, the second connecting part 771 moves to its highest point. This causes the two bellows 3 connected by the first connecting part 761 and the second connecting part 771 through the guide assembly to move in opposite directions, so that when one bellows 3 is compressing, the other bellows 3 is extending.

[0040] In this embodiment, the guiding assembly includes a partition 5 horizontally fixedly installed inside the frame 1. The partition 5 has a guide hole, and a guide member 4 is provided in the guide hole. The guide member 4 can slide back and forth along the guide hole in the height direction. The top end of the guide member 4 is fixedly connected to the bottom end of the bellows 3, and the bottom end of the guide member 4 is provided with a crank 78 connected to the first connecting part 761 or the second connecting part 771. Because the guide member 4 is limited by the guide hole, the bellows 3 will only extend and retract in the vertical direction, and there will be no shaking or swaying, thus improving the working stability.

[0041] Optionally, the bottom end of the bellows 3 extends downward into a columnar body 33, and the top end of the guide 4 forms a sleeve 41. The columnar body 33 has a first through hole arranged laterally, and the sleeve 41 has a second through hole arranged laterally. In the assembled state, the columnar body 33 is inserted into the sleeve 41, and the first and second through holes are aligned in the lateral direction. The bellows 3 and the guide 4 can be fixedly connected by a pin and a shaft. The bottom end of the guide 4 extends downward into a pair of spaced mounting ears 42. The top end of the crank 78 is inserted between the pair of mounting ears 42, and the top end of the crank 78 is hinged to the mounting ears 42 by a hinge. The hinge can also be a shaft, as long as it allows the crank 78 to rotate relative to the guide 4. The bottom end of the crank 78 is provided with a bearing 79. The outer ring of the bearing 79 is fixed to the crank 78, and the inner ring of the bearing 79 is fixed to the first connecting part 761 or the second connecting part 771. It should be noted that the eccentric wheel, crank 78, and guide 4 together form a crank 78 slider mechanism, which can also be regarded as a cam mechanism. This can convert the rotation of the left eccentric wheel 76 or the right eccentric wheel 77 into the reciprocating motion of the guide 4 in the vertical direction, thereby guiding the movement direction of the bellows 3.

[0042] In this embodiment, a groove 51 is provided on the top surface of the partition 5, and a conduit 52 is provided below the partition 5. The top end of the conduit 52 passes through the partition 5 and communicates with the groove 51, while the bottom end of the conduit 52 extends out of the bottom surface of the frame 1. If leakage occurs in the bellows 3 or at the connection between the bellows 3 and other components, the liquid will be discharged along the groove 51 and the conduit 52 to the bottom of the frame 1. This allows for a direct and timely indication of a malfunction in the injection pump, providing guidance for subsequent inspection and maintenance.

[0043] In addition, the frame 1 is also equipped with a tensioning wheel 60 for adjusting the timing belt 74, which can adjust the tension of the timing belt 74 to ensure the accuracy of liquid injection.

[0044] The working process of the injection pump in this embodiment is as follows: The drive motor 71 provides reciprocating motion power. Under the transmission of the synchronous belt 74 pulley assembly, the drive motor 71 drives the transmission shaft 75 to rotate. The rotation of the transmission shaft 75 drives the left eccentric wheel 76 and the right eccentric wheel 77 to rotate. Under the guidance of the guide assembly, the two bellows 3 extend and retract in opposite directions in the vertical direction, so that the volume in the bellows 3 changes. The volume increases for the liquid suction process, and the volume decreases for the liquid discharge process. Since the two bellows 3 are set in opposite directions of extension and retraction, when the volume of one bellows 3 decreases, the volume of the other bellows 3 increases. This ensures that when one bellows 3 is discharging liquid, the other bellows 3 is inleting liquid. This achieves uninterrupted liquid inlet and outlet, thereby improving the working efficiency of the injection pump and solving the problem of low working efficiency in the past.

[0045] The injection pump in this embodiment uses a bellows 3 as the main fluid carrier. Its overall structure is simple and compact, exhibiting high operational stability and facilitating maintenance. The bellows 3 can be made of high-strength, acid- and alkali-resistant materials, thereby improving the pump's corrosion resistance and stability, solving the problems of short service life and inapplicability to corrosive liquids found in previous models. The injection pump in this embodiment uses a guide assembly to guide the movement of the bellows 3, greatly ensuring injection accuracy and solving the problem of large swaying during the bellows 3's extension and retraction, which led to unstable injection accuracy and further improved operational stability.

[0046] Finally, it should be noted that the high-efficiency integrated CNC constant flow injection pump disclosed in the embodiments of the present invention is only a preferred embodiment of the present invention and is only used to illustrate the technical solution of the present invention, not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-efficiency integrated CNC constant flow injection pump, characterized in that, include: The pump cover has an independent outlet channel and an inlet channel inside. The bottom surface of the pump cover has two spaced first mounting holes that are connected to the outlet channel and two spaced second mounting holes that are connected to the inlet channel. An outlet check valve is fixedly installed in each of the first mounting holes and an inlet check valve is fixedly installed in each of the second mounting holes. Two bellows, each bellows being cylindrical in shape, are provided such that the bottom end of each bellows forms a closed structure and the top end forms an opening communicating with the internal cavity. The two bellows are spaced apart and sealed and fixed to the bottom surface of the pump cover. Each bellows is connected to one outlet check valve and one inlet check valve. A drive mechanism is used to drive the two bellows to extend and retract in opposite directions in the vertical direction, so that when one of the bellows is in a compressive motion, the other bellows is in an extending motion.

2. The high-efficiency integrated CNC constant flow injection pump according to claim 1, characterized in that, Each of the bellows has a mounting portion extending outward from its top end, and the mounting portion is fixedly installed on the bottom surface of the pump cover by screws.

3. The high-efficiency integrated CNC constant flow injection pump according to claim 2, characterized in that, A sealing gasket is provided between the top surface of the mounting part and the bottom surface of the pump cover.

4. The high-efficiency integrated CNC constant flow injection pump according to claim 1, characterized in that, It also includes a frame, which is fixedly installed below the pump cover, and the drive mechanism is installed inside the frame.

5. A high-efficiency integrated CNC constant flow injection pump according to claim 4, characterized in that, The drive mechanism includes a drive motor, a driving pulley, a driven pulley, a synchronous belt, a transmission shaft, a left eccentric pulley, and a right eccentric pulley; The drive motor is fixedly mounted on the inner bottom surface of the frame, the drive pulley is fixedly mounted on the output shaft of the drive motor, the transmission shaft is arranged laterally and rotatably mounted below the two bellows, the left eccentric wheel is fixedly mounted on the left side of the transmission shaft and located below one of the bellows, the right eccentric wheel is fixedly mounted on the right side of the transmission shaft and located below the other bellows, the driven pulley is fixedly sleeved on the outer peripheral side of the transmission shaft, and the synchronous belt is sleeved on the outer peripheral side of the drive pulley and the driven pulley; Both the left and right eccentric wheels are connected to the bottom of the corresponding bellows via guide components.

6. A high-efficiency integrated CNC constant flow injection pump according to claim 5, characterized in that, The left eccentric wheel extends outward to form a first connecting part that connects to the guide assembly, and the right eccentric wheel extends outward to form a second connecting part that connects to the guide assembly. The first connecting part and the second connecting part are staggered in the height direction.

7. A high-efficiency integrated CNC constant flow injection pump according to claim 6, characterized in that, The guide assembly includes a partition plate that is horizontally fixedly installed inside the frame. The partition plate has a guide hole, and a guide member is provided in the guide hole. The guide member can slide back and forth along the guide hole in the height direction. The top end of the guide member is fixedly connected to the bottom end of the bellows, and the bottom end of the guide member is provided with a crank that connects to the first connecting part or the second connecting part.

8. A high-efficiency integrated CNC constant flow injection pump according to claim 7, characterized in that, The bottom end of the corrugated pipe extends downward into a columnar body, the top end of the guide member forms a sleeve, the columnar body is provided with a first through hole arranged laterally, and the sleeve is provided with a second through hole arranged laterally. In the assembled state, the columnar body is inserted into the sleeve, and the first through hole and the second through hole are aligned in the lateral direction.

9. A high-efficiency integrated CNC constant flow injection pump according to claim 7, characterized in that, The bottom end of the guide extends downward to form a pair of spaced mounting ears, the top end of the crank is inserted between the pair of mounting ears, and the top end of the crank is hinged to the mounting ears by a hinge. The bottom end of the crank is provided with a bearing, the outer ring of the bearing is fixed to the crank, and the inner ring of the bearing is fixedly connected to the first connecting part or the second connecting part.

10. A high-efficiency integrated CNC constant flow injection pump according to claim 7, characterized in that, The top surface of the partition is provided with a groove, and a conduit is provided below the partition. The top end of the conduit passes through the partition and communicates with the groove, and the bottom end of the conduit extends out of the bottom surface of the frame.

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