Dust collecting device for wooden box processing

Abstract

The dust collecting device comprises a base table, a treatment bin is installed at the front end of the top of the base table, a filter screen is arranged at the front end of the treatment bin, the rear end of the treatment bin is open, a slag discharging opening and a receding opening are formed in the two sides of the treatment bin, and a feeding opening is formed in the top of the treatment bin; the dust collection mechanism comprises a dust collection pipe and a humidification structure, the dust collection pipe communicates with the feeding port, a suction pump is installed on the dust collection pipe, and the humidification structure is installed on the dust collection pipe; the extrusion mechanism comprises an extrusion plate and a motor, the extrusion plate is slidably mounted in the treatment bin, a rocker is rotatably mounted at the rear end of the extrusion plate, a crank is rotatably connected to the far end of the rocker, and the motor is mounted at the rear end of the base and is in driving connection with the far end of the crank; the deslagging mechanism comprises a driving assembly and a deslagging plate, and the driving assembly can drive the deslagging plate to move back and forth between the receding opening and the deslagging opening. According to the device, squeezing of materials and discharging of solids can be repeatedly and alternately carried out, automatic screening of the solids and liquid is achieved, and the dust collecting efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dust treatment, and particularly relates to a dust collection device for wooden box processing. Background Art

[0002] Currently, when processing wooden boxes, processes such as cutting, shaving, planing, and grinding are generally involved. During the operation process, a large amount of dust and wood chips will be generated. These dust and chips will be mixed in the air and are easily inhaled by the operators, causing harm to the health of the operators. Therefore, it is particularly important to equip a dust collection device in the wooden box processing area.

[0003] Chinese Patent with publication number CN118477425B discloses an exhaust gas dust removal and purification device for wooden furniture production and processing, which can make the exhaust gas in the first treatment box be carried by atomized water droplets and fall to the bottom of the box. The solid pollutants in the waste liquid are separated from the liquid through a separation device. The solid pollutants are separated below the filter plate, and the liquid is discharged outside the second treatment box through a drainage mechanism. Then the operator opens the second treatment box, so that it is convenient to collect and process the solid pollutants.

[0004] However, after separating the soaked solid pollutants from the liquid, the above device still requires manual collection of the solid pollutants, resulting in low operation efficiency. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention proposes a dust collection device for wooden box processing to solve the above problems.

[0006] The purpose of the present invention is achieved through the following technical solutions: A dust collection device for wooden box processing provided by the present invention includes: A base, at the front end of the top of which a treatment chamber is installed. A filter screen is provided at the front end of the treatment chamber and the rear end is open. A slag discharge port and an avoidance port are respectively provided on both sides of the treatment chamber near its front end. A feeding port is opened at the top of the treatment chamber; A dust suction mechanism, which includes a dust suction pipe and a humidifying structure. One end of the dust suction pipe is communicated with the feeding port and a suction pump is installed thereon. The humidifying structure is installed on the dust suction pipe for spraying water mist into the dust suction pipe; An extrusion mechanism, which includes an extrusion plate and a motor. The extrusion plate is slidably installed in the treatment chamber along the direction of approaching or departing from the filter screen. A rocker is rotatably installed at the rear end of the extrusion plate. The distal end of the rocker is rotatably connected to a crank. The motor is installed at the rear end of the base and is drivingly connected to the distal end of the crank; A slag discharge mechanism, which includes a driving component and a slag discharge plate. The driving component can drive the slag discharge plate to move back and forth between the avoidance port and the slag discharge port.

[0007] Further, the driving assembly includes a first cylinder, a connecting pipe, and a driving structure. The first cylinder is installed outside the treatment chamber, and a first piston rod penetrates through one end of the first cylinder close to the treatment chamber. The slag discharge plate is installed at the outer end of the first piston rod. The connecting pipe is connected between the other end of the first cylinder and the driving structure, and the driving structure can periodically inflate or deflate the first cylinder.

[0008] Further, the driving structure includes an annular groove, a movable pin, and a second cylinder. The annular groove is formed on the top surface of the base with the output shaft end of the motor as the center. A depression is provided on the path of the annular groove. One end of the depression slopes upward and is smoothly connected to the bottom surface of the annular groove. The movable pin slidably penetrates through the center of the rotation connection point of the crank and the rocker, and the bottom end is located in the annular groove. A pressing plate is provided on the movable pin below the rocker. A first spring is connected between the pressing plate and the rocker to provide an elastic force to make the bottom end of the movable pin abut against the bottom surface of the annular groove. The second cylinder is installed above the movable pin through a bracket. The second cylinder is arc-shaped and the center is located at the output shaft end of the motor. One end of the second cylinder is connected to the connecting pipe, and the other end penetrates through a second piston rod. A third spring is connected between the inner end of the second piston rod and the inner wall of the second cylinder to provide an elastic force to eject the second piston rod out of the second cylinder. The outer end of the second piston rod is provided with a push plate extending downward. The push plate is located on the rotation path of the movable pin. When the movable pin is located in the depression, the height of its top end is lower than the bottom end height of the push plate. When the movable pin moves out of the depression, the height of its top end is higher than the bottom end height of the push plate.

[0009] Further, a baffle is rotatably connected to one side of the bottom of the feeding port away from the filter screen. A pressing block is provided at the top of the extrusion plate, and the extrusion plate is located on the side of the baffle away from the feeding port.

[0010] Further, a bent portion is provided at the top of the slag discharge plate. A slag pushing plate is slidably connected up and down on one side of the slag discharge plate close to the slag discharge port, and a second spring is connected between the slag pushing plate and the bent portion.

[0011] Further, a seesaw is provided outside the bottom of the slag discharge port. The distal end of the seesaw is curved upward. A liquid guide plate is provided outside the bottom of the filter screen and slopes downward.

[0012] Further, a dry material hopper is provided outside the slag discharge port, and a liquid storage hopper is provided outside the filter screen.

[0013] Further, the humidifying structure includes an annular pipe and a water delivery pipe. The annular pipe is installed on the outer wall of the dust suction pipe. A plurality of spray heads communicating with the inside of the dust suction pipe are evenly distributed on the inner side of the annular pipe. One end of the water delivery pipe is communicated with the annular pipe, and the other end is connected to an external water source.

[0014] As can be seen from the above technical solutions, a dust collection device for wooden box processing provided by the present invention: The driving component uses the rotation of the crank in the extrusion mechanism as the driving source to provide continuous power output for the reciprocating movement of the slag discharge plate. By means of the sunken part in the annular groove, every time the extrusion plate completes one extrusion, it will cause the movable pin to complete one push and reset of the second piston rod in the annular groove, so that the extrusion of the material by the extrusion plate and the discharge of solids by the slag discharge plate are repeated alternately, realizing the automatic screening of solids and liquids, improving the dust collection efficiency. After the moisture of the dust and wood chips is squeezed out by extrusion, the volume is compressed, which can not only prevent dust generation and secondary pollution during collection, but also increase the collection amount of dust and wood chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for the specific embodiments will be briefly introduced below. In all the drawings, the components or parts do not necessarily draw according to the actual ratio.

[0016] Figure 1 Schematic three-dimensional structure of the present invention Figure 1 ; Figure 2 Schematic three-dimensional structure of the present invention Figure 2 ; Figure 3 is Figure 2 the partial enlarged view of A in Figure 4 Schematic top view structure of the base of the present invention at the position of the annular groove with the bracket hidden Figure 5 Cross-sectional view of the side view structure of the treatment chamber of the present invention Figure 6 Internal structure schematic diagram of the humidifying structure of the present invention Figure 7 Cross-sectional view of the front view structure of the treatment chamber of the present invention Reference numerals: Base 1; Treatment chamber 2, filter screen 21, liquid guide plate 211, liquid storage hopper 212, slag discharge port 22, seesaw 221, dry material hopper 222, avoidance port 23, feeding port 24, baffle 241; Dust suction mechanism 3, dust suction pipe 31, humidifying structure 32, annular pipe 321, water delivery pipe 322, spray head 323, suction pump 33; Extrusion mechanism 4, extrusion plate 41, pressing block 411, motor 42, rocker 43, crank 44; Discharge mechanism 5, drive assembly 51, first cylinder 511, first piston rod 5111, connecting pipe 512, annular groove 513, sunken part 5131, movable pin 514, pressing piece 5141, first spring 5142, second cylinder 515, second piston rod 5151, push plate 5152, bracket 516, slag discharge plate 52, bent part 521, slag pushing plate 522, second spring 523. Detailed implementation mode

[0017] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines the attached drawings and preferred embodiments to elaborate in detail on the specific implementation mode, structure, characteristics and effects of the present invention as follows.

[0018] As Figures 1-7 shown, a dust collection device for wooden box processing provided in this embodiment includes a base 1, a processing chamber 2, a dust suction mechanism 3, an extrusion mechanism 4 and a slag discharge mechanism 5.

[0019] A processing chamber 2 is installed at the front end of the top of the base 1. A filter screen 21 is provided at the front end of the processing chamber 2 and the rear end is open. The filter screen 21 is flush with the inner wall of the processing chamber 2. A slag discharge port 22 and an avoidance port 23 are respectively provided at positions on both sides of the processing chamber 2 close to its front end. The slag discharge port 22 and the avoidance port 23 are both attached to the front inner wall of the processing chamber 2, and their openings are opposite. An inlet port 24 for dust and wood chips to enter is opened at the top of the processing chamber 2.

[0020] The dust suction mechanism 3 includes a dust suction pipe 31 and a humidifying structure 32. One end of the dust suction pipe 31 is communicated with the inlet port 24 and a suction pump 33 is installed thereon. The other end of the dust suction pipe 31 is close to the position of the wooden box processing operation. The suction pump 33 can provide suction to suck dust and wood chips into the processing chamber 2. The humidifying structure 32 is installed on the dust suction pipe 31 and is used to spray water mist into the dust suction pipe 31 to wet the dust and wood chips and reduce dust emission.

[0021] As Figure 1 and Figure 6 shown, specifically, the humidifying structure 32 includes an annular pipe 321 and a water delivery pipe 322. The annular pipe 321 is installed on the outer wall of the dust suction pipe 31. A plurality of spray heads 323 communicated with the inside of the dust suction pipe 31 are evenly distributed on the inner side of the annular pipe 321. One end of the water delivery pipe 322 is communicated with the annular pipe 321, and the other end is externally connected to a water source. Water is pumped from the external water source to the water delivery pipe 322 by a water pump, and then the water is sprayed into the dust suction pipe 31 in a mist form from each spray head 323 to wet the dust and wood chips.

[0022] The extrusion mechanism 4 includes an extrusion plate 41 and a motor 42. The extrusion plate 41 is slidably mounted in the processing chamber 2 in a direction close to or away from the filter screen 21. The bottom and the edges on both sides of the extrusion plate 41 are in contact with the inner wall of the processing chamber 2. A rocker 43 is rotatably mounted at the rear end of the extrusion plate 41. The distal end of the rocker 43 passes through the opening of the processing chamber 2 and is rotatably connected to a crank 44. The motor 42 is mounted at the rear end of the base 1 and is drivingly connected to the distal end of the crank 44. Specifically, the motor 42 is mounted at the bottom of the base 1, and its output shaft end penetrates to the top of the base 1 and is fixedly connected to the distal end of the crank 44. It should be noted that the axes of rotation of the rocker 43, the crank 44, and the output shaft end of the motor 42 are all perpendicular to the top surface of the base 1. By starting the motor 42, the crank 44 can be rotated, and by driving the rocker 43 to swing, the extrusion plate 41 can be periodically close to and away from the filter screen 21, so that the extrusion plate 41 can repeatedly squeeze the dust and wood chips towards the filter screen 21, and squeeze the excess water in the dust and wood chips out of the filter screen 21.

[0023] The slag discharging mechanism 5 includes a driving component 51 and a slag discharging plate 52. The driving component 51 can drive the slag discharging plate 52 to move back and forth between the avoidance opening 23 and the slag discharging opening 22. The slag discharging plate 52 is initially located in the avoidance opening 23 to prevent the slag discharging plate 52 from blocking the moving path of the extrusion plate 41. Whenever the extrusion plate 41 squeezes out the excess water of the dust and wood chips, the driving component 51 can make the slag discharging plate 52 push the solid matter near the filter screen 21 out of the slag discharging opening 22.

[0024] In an embodiment, the driving component 51 includes a first air cylinder 511, a connecting pipe 512, and a driving structure. The first air cylinder 511 is mounted outside the processing chamber 2 and faces the avoidance opening 23. A first piston rod 5111 penetrates through one end of the first air cylinder 511 close to the processing chamber 2. The slag discharging plate 52 is mounted at the outer end of the first piston rod 5111. The connecting pipe 512 is connected between the other end of the first air cylinder 511 and the driving structure. The driving structure can periodically inflate or deflate the first air cylinder 511, and the gas is transmitted through the connecting pipe 512, so that the first piston rod 5111 can drive the slag discharging plate 52 to push from the avoidance opening 23 to the slag discharging opening 22 to discharge the solid matter, or drive the slag discharging plate 52 to retract from the slag discharging opening 22 to the avoidance opening 23 so that the extrusion plate 41 can subsequently squeeze the dust and wood chips.

[0025] Further, the driving structure includes a ring groove 513, a movable pin 514, and a second cylinder 515. The ring groove 513 is formed on the top surface of the base 1 with the end of the output shaft of the motor 42 as the center, and the ring groove 513 is located below the rotation path of the rotation connection point of the crank 44 and the rocker 43. A depression 5131 is provided on the path of the ring groove 513. The overall height of the bottom surface of the depression 5131 is lower than the bottom surface height of the ring groove 513. One end of the depression 5131 slopes upward and is smoothly connected to the bottom surface of the ring groove 513. The movable pin 514 is slidably inserted through the center of the rotation connection point of the crank 44 and the rocker 43, and the bottom end is located in the ring groove 513. The movable pin 514 can serve as a rotating shaft to realize the rotational connection between the crank 44 and the rocker 43. A pressing plate 5141 is provided on the movable pin 514 below the rocker 43. A first spring 5142 is connected between the pressing plate 5141 and the rocker 43. The first spring 5142 can provide an elastic force to make the bottom end of the movable pin 514 abut against the bottom surface of the ring groove 513. The second cylinder 515 is installed above the movable pin 514 through a bracket 516. The second cylinder 515 is arc-shaped and the center of the circle is located at the end of the output shaft of the motor 42. One end of the second cylinder 515 is connected to the connecting pipe 512, and the other end is provided with a second piston rod 5151 passing through. The second piston rod 5151 is also arc-shaped. A third spring (not shown in the figure) is connected between the inner end of the second piston rod 5151 and the inner wall of the second cylinder 515 to provide an elastic force to eject the second piston lever 5151 out of the second cylinder 515. The outer end of the second piston rod 5151 is provided with a push plate 5152 extending downward. The push plate 5152 is located on the rotation path of the movable pin 514. When the movable pin 514 is located in the depression 5131, the height of its top end is lower than the bottom end height of the push plate 5152. When the movable pin 514 moves out of the depression 5131, the height of its top end is higher than the bottom end height of the push plate 5152. Therefore, when the movable pin 514 moves out of the depression 5131 and its top end abuts against the push plate 5152, the push plate 5152 can be pushed into the second cylinder 515. It should be noted that when the movable pin 514 pushes the push plate 5152 into the second cylinder 515, the extrusion plate 41 should be in a state away from the filter screen 21 to avoid movement interference between the slag discharge plate 52 and the extrusion plate 41.

[0026] When the device is operating, dust and wood chips are sucked into the processing chamber 2 through the dust suction mechanism 3 via the feeding port 24. The motor 42 drives the crank 44 to rotate and the rocker 43 to swing, so that the extrusion plate 41 repeatedly approaches and moves away from the filter screen 21, extruding the materials in the processing chamber 2. When the extrusion plate 41 squeezes out the excess moisture in the dust and wood chips through the filter screen 21, it immediately moves away from the filter screen 21. The movable pin 514 abuts against the push plate 5152 as the crank 44 rotates, and pushes the push plate 5152 into the second cylinder 515. The gas is transmitted to the first cylinder 511 through the connecting pipe 512, and then the slag discharge plate 52 is pushed from the avoidance port 23 along the surface of the filter screen 21 to the slag discharge port 22 through the first piston rod 5111, discharging the squeezed solid from the slag discharge port 22. The movable pin 514 continues to move into the sunken part 5131, making the top height of the movable pin 514 lower than the bottom height of the push plate 5152, so that the movable pin 514 disengages from the push plate 5152. The second piston rod 5111 will then pop out of the second cylinder 515 under the elastic force of the third spring, creating a negative pressure in the second cylinder 515 to suck the gas in the first cylinder 511 through the connecting pipe 512. Thus, the first piston rod 5111 drives the slag discharge plate 52 to retract from the avoidance port 23. As the motor 42 continues to operate, the extrusion plate 41 will squeeze the materials again. After the extrusion plate 41 squeezes and moves away from the filter screen 21, the movable pin 514 will move out of the sunken part 5131 again, repeating and alternating the squeezing and discharging of the materials.

[0027] In the present invention, the driving assembly 51 uses the rotation of the crank 44 in the extrusion mechanism 4 as the driving source to provide continuous power output for the reciprocating movement of the slag discharge plate 52. By using the sunken part 5131 in the annular groove 513, every time the extrusion plate 41 completes an extrusion, the movable pin 514 will complete a push and reset of the second piston rod 5151 in the annular groove 513, enabling the extrusion of the materials by the extrusion plate 41 and the discharge of the solid by the slag discharge plate 52 to repeat alternately, realizing the automatic screening of solids and liquids, improving the dust collection efficiency. After the dust and wood chips are squeezed and drained of moisture, their volume is compressed, which can not only prevent dust generation and secondary pollution during collection, but also increase the collection amount of dust and wood chips.

[0028] As Figure 5 shown, preferably, a baffle 241 is rotatably connected to the side of the bottom of the feeding port 24 away from the filter screen 21. A pressing block 411 is arranged on the top of the extrusion plate 41. The extrusion plate 41 is located on the side of the baffle 241 away from the feeding port 24. When the extrusion plate 41 approaches the filter screen 21, the pressing block 411 can push and flip the baffle 241, so that the baffle 241 temporarily blocks the feeding port 24, preventing the materials in the dust suction pipe 31 from falling behind the extrusion plate 41 when the extrusion plate 41 squeezes the materials in the processing chamber 2. As the extrusion plate 41 moves away from the filter screen 21, the baffle 241 will naturally drop to open the feeding port 24.

[0029] like Figure 7 As shown, in one embodiment, a bending portion 521 is provided at the top of the slag discharge plate 52, and a slag pusher plate 522 is slidably connected to the side of the slag discharge plate 52 close to the slag discharge port 22, and a second spring 523 is connected between the slag pusher plate 522 and the bending portion 521, and the second spring 523 can provide elastic force to make the bottom end of the slag pusher plate 522 abut against the bottom surface of the processing bin 2, so that when the slag discharge plate 52 moves, the slag pusher plate 522 can scrape off the attachments attached to the bottom surface of the processing bin 2. Preferably, the slag discharge plate 52 and the slag pusher plate 522 are both in contact with the inner side of the filter screen 21 to scrape off the attachments attached to the inner side of the filter screen 21. It should be noted that the edges of the slag discharge plate 52 and the slag pusher plate 522 should be in contact with the inner wall of the avoidance port 23 to prevent the material from being squeezed out from the avoidance port 23.

[0030] Furthermore, a seesaw 221 is provided on the outer side of the bottom of the slag discharge port 22, the far end of the seesaw 221 is curved upward, and there are baffles on both sides of the seesaw 221. The seesaw 221 can prevent the squeezed liquid from leaking out of the slag discharge port 22, and a downwardly inclined liquid guide plate 211 is provided on the outer side of the bottom of the filter screen 21 to guide the liquid to flow out.

[0031] Preferably, a dry material hopper 222 is provided outside the slag discharge port 22 to contain the dust and sawdust after being squeezed out, and a liquid storage hopper 212 is provided outside the filter screen 21 to contain the waste liquid after squeezing out for centralized treatment.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A dust collection device for wooden box processing, characterized in that, Comprising: A base station, at the front end of the top of which a processing bin is installed. A filter screen is provided at the front end of the processing bin and the rear end is open. A slag discharge port and an avoidance port are respectively provided on both sides of the processing bin close to its front end, and a feeding port is opened at the top of the processing bin; A dust suction mechanism, which includes a dust suction pipe and a humidifying structure. One end of the dust suction pipe is communicated with the feeding port and a suction pump is installed thereon. The humidifying structure is installed on the dust suction pipe for spraying water mist into the dust suction pipe; An extrusion mechanism, which includes an extrusion plate and a motor. The extrusion plate is slidably installed in the processing bin in a direction close to or away from the filter screen. A rocker is rotatably installed at the rear end of the extrusion plate, and the distal end of the rocker is rotatably connected to a crank. The motor is installed at the rear end of the base station and is drivingly connected to the distal end of the crank; A slag discharge mechanism, which includes a driving component and a slag discharge plate. The driving component can drive the slag discharge plate to move back and forth between the avoidance port and the slag discharge port.

2. The dust collection device for wooden box processing according to claim 1, wherein the driving component includes a first cylinder, a connecting pipe and a driving structure. The first cylinder is installed outside the processing bin, and a first piston rod penetrates through one end close to the processing bin. The slag discharge plate is installed at the outer end of the first piston rod. The connecting pipe is connected between the other end of the first cylinder and the driving structure. The driving structure can periodically inflate or deflate the first cylinder.

3. The dust collection device for wooden box processing according to claim 2, wherein the driving structure includes an annular groove, a movable pin and a second cylinder. The annular groove is opened on the top surface of the base station with the output shaft end of the motor as the center. A depression part is provided on the path of the annular groove. One end of the depression part slopes upward and is smoothly connected to the bottom surface of the annular groove. The movable pin slidably penetrates through the center of the rotation connection point of the crank and the rocker and the bottom end is located in the annular groove. A pressing piece is provided on the movable pin below the rocker. A first spring is connected between the pressing piece and the rocker to provide an elastic force to make the bottom end of the movable pin abut against the bottom surface of the annular groove. The second cylinder is installed above the movable pin through a bracket. The second cylinder is arc-shaped and the center is located at the output shaft end of the motor. One end of the second cylinder is connected to the connecting pipe and the other end penetrates through a second piston rod. A third spring is connected between the inner end of the second piston rod and the inner wall of the second cylinder to provide an elastic force to eject the second piston rod out of the second cylinder. The outer end of the second piston rod is provided with a downward extending push plate. The push plate is located on the rotation path of the movable pin. When the movable pin is located in the depression part, the height of its top end is lower than the bottom end height of the push plate. When the movable pin moves out of the depression part, the height of its top end is higher than the bottom end height of the push plate.

4. The dust collection device for wooden box processing according to claim 1, a baffle is rotatably connected to the side of the bottom of the feeding port away from the filter screen. A pressing block is provided on the top of the extrusion plate. The extrusion plate is located on the side of the baffle away from the feeding port.

5. The dust collection device for wooden box processing according to claim 1, a bending part is provided on the top of the slag discharge plate. A slag pushing plate is slidably connected up and down on the side of the slag discharge plate close to the slag discharge port. And a second spring is connected between the slag pushing plate and the bending part.

6. The dust collection device for wooden box processing according to claim 5, wherein a seesaw is provided on the outer side of the bottom of the slag discharge port, the distal end of the seesaw is curved and upturned, and a liquid guide plate inclined downward is provided on the outer side of the bottom of the filter screen.

7. The dust collection device for wooden box processing according to claim 1, wherein a dry material hopper is provided outside the slag discharge port, and a liquid storage hopper is provided outside the filter screen.

8. The dust collection device for wooden box processing according to claim 1, wherein the humidifying structure comprises an annular pipe and a water delivery pipe, the annular pipe is installed on the outer wall of the dust suction pipe, a plurality of spray heads communicating with the inside of the dust suction pipe are evenly distributed on the inner side of the annular pipe, one end of the water delivery pipe is communicated with the annular pipe, and the other end is externally connected to a water source.

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