CN213792300U

CN213792300U - Knapsack hand sprayer

Info

Publication number: CN213792300U
Application number: CN202022634895.8U
Authority: CN
Inventors: 陈恩福
Original assignee: Taizhou City Chungfeng Machinery Co ltd
Current assignee: Taizhou City Chungfeng Machinery Co ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-07-27
Anticipated expiration: 2030-11-13

Abstract

The utility model relates to the technical field of sprayers, in particular to a knapsack manual sprayer which can effectively reduce the vibration and noise of a motor; the water-saving box comprises a box body, a cylinder body, a piston, a sliding rod, a connecting rod, a movable rod, a rotating rod, a rocker, a supporting plate and a motor, wherein a working cavity is arranged in the box body, a box opening is formed in the central area of the top end of the box body, a box cover is detachably arranged at the box opening, the right end of the rotating rod is inserted into a rotating groove, a ball bearing is arranged between the right end of the rotating rod and the inner side wall of the rotating groove, the lower half area of the right side wall of the cylinder body is communicated with a water inlet pipe, a first one-way valve is arranged on the water inlet pipe, the central area of the bottom end of the cylinder body is communicated with a water outlet pipe, a second one-way valve is arranged on the water outlet pipe, a transmission shaft is arranged at the output end of the left part of the motor, and a spiral blade is arranged in the left half area of the outer side wall of the transmission shaft; the sound insulation device also comprises a shell, a fixed plate, a spring and an auxiliary plate, wherein a sound insulation pad is arranged on the inner side wall of the shell.

Description

Knapsack hand sprayer

Technical Field

The utility model relates to a technical field of atomizer especially relates to a manual atomizer of backpack.

Background

As is well known, a manual knapsack sprayer is an auxiliary device for spraying pesticide during the agricultural planting process, and is widely used in the field of agricultural planting; the prior knapsack manual sprayer comprises a box body, a cylinder body, a piston, a sliding rod, a connecting rod, a movable rod, a rotating rod, a rocker, a supporting plate and a motor, wherein a working chamber is arranged in the box body, a box opening is arranged in the central area of the top end of the box body, the box opening is communicated with the working chamber, a box cover is detachably arranged at the box opening, an upper connecting hole and a lower connecting hole are respectively and longitudinally arranged in the left half area of the top end and the bottom end of the box body, the bottom end of the cylinder body sequentially penetrates through the upper connecting hole, the working chamber and the lower connecting hole, the cylinder body is hermetically connected with the inner side wall of the upper connecting hole and the inner side wall of the lower connecting hole, an inner cavity is arranged in the cylinder body, the central area of the top end of the cylinder body is longitudinally provided with the sliding hole, the piston is transversely and slidably fixed in the inner cavity, the bottom end of the sliding rod penetrates through the sliding hole and is connected with the central area of the top end of the piston, the left end and the right end of the connecting rod are respectively hinged with the movable rod and the top end of the sliding rod, the lower half area of the left side wall of the box body is provided with a rotating groove, the right end of the rotating rod is inserted into the rotating groove and is provided with a ball bearing between the inner side wall of the rotating groove, the bottom end of the rocker is connected with the left half area of the top end of the rotating rod, the bottom end of the movable rod is rotatably hinged with the central area of the rocker, the lower half area of the right side wall of the barrel is communicated with a water inlet pipe, a first one-way valve is arranged on the water inlet pipe, the central area of the bottom end of the barrel is communicated with a water outlet pipe, a second one-way valve is arranged on the water outlet pipe, the central area of the right side wall of the box body is transversely provided with a rotating hole, the left end of the supporting plate is connected with the lower half area of the right side wall of the box body, the motor is arranged at the top end of the supporting plate, the left output end of the motor is provided with a transmission shaft, the left end of the transmission shaft penetrates through the rotating hole and extends into the working cavity, the transmission shaft is mechanically sealed with the inner side wall of the rotating hole, and the left half area of the outer side wall of the transmission shaft is provided with a helical blade; when the existing knapsack manual sprayer is used, the box cover is opened, a medicament and clean water are poured into the working cavity according to a certain proportion, the motor is electrified, the motor drives the transmission shaft to rotate, the transmission shaft drives the helical blade to rotate, the helical blade mixes and stirs the clean water and the medicament in the working cavity, the box body is provided with an external braces, a worker carries the box body on the body through the external braces, the output end of the water outlet pipe is connected with the input end of an external spray head, the worker holds the top end of the rocker to enable the rocker to rotate in a reciprocating manner at an angle of 90 degrees, the piston reciprocates up and down in the inner cavity under the action of the movable rod, the connecting rod and the sliding rod, the first one-way valve ensures that the liquid in the working cavity can only flow into the inner cavity, the second one-way valve enables the liquid in the inner cavity to only flow out of the water outlet pipe, and the mixed liquid pressed out of the water outlet pipe is sprayed out from the output end of the external spray head; the existing knapsack manual sprayer is found to easily generate large vibration and generate large noise in the running process of a motor during use, so that the use reliability is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a vibrations and the noise that can effectual reduction motor improve the manual sprayer of backpack who uses the reliability.

The utility model relates to a knapsack manual sprayer, which comprises a box body, a cylinder body, a piston, a sliding rod, a connecting rod, a movable rod, a rotating rod, a rocker, a supporting plate and a motor, wherein a working chamber is arranged inside the box body, a box opening is arranged in the central area of the top end of the box body, the box opening is communicated with the working chamber, a box cover can be detachably arranged at the box opening, an upper connecting hole and a lower connecting hole are respectively and longitudinally arranged in the left half area of the top end and the left half area of the bottom end of the box body, the bottom end of the cylinder body sequentially passes through the upper connecting hole, the working chamber and the lower connecting hole, the cylinder body is hermetically connected with the inner side wall of the upper connecting hole and the inner side wall of the lower connecting hole, an inner cavity is arranged inside the cylinder body, a sliding hole is longitudinally arranged in the central area of the top end of the cylinder body, the piston is transversely slidably fixed in the inner cavity, the bottom end of the sliding rod passes through the sliding hole and is connected with the central area of the top end of the piston, the left end and the right end of the connecting rod are respectively hinged with the movable rod and the top end of the sliding rod, the lower half area of the left side wall of the box body is provided with a rotating groove, the right end of the rotating rod is inserted into the rotating groove and is provided with a ball bearing between the right end of the rotating rod and the inner side wall of the rotating groove, the bottom end of the rocker is connected with the left half area of the top end of the rotating rod, the bottom end of the movable rod is rotatably hinged with the central area of the rocker, the lower half area of the right side wall of the cylinder body is communicated with a water inlet pipe, a first one-way valve is arranged on the water inlet pipe, a water outlet pipe is communicated with the central area of the bottom end of the cylinder body, a second one-way valve is arranged on the water outlet pipe, a rotating hole is transversely formed in the central area of the right side wall of the box body, the left end of the supporting plate is connected with the lower half area of the right side wall of the box body, the motor is installed at the top end of the supporting plate, a transmission shaft is arranged at the output end of the left part of the motor, the left end of the transmission shaft penetrates through the rotating hole and extends into the working cavity, mechanical sealing is formed between the transmission shaft and the inner side wall of the rotating hole, and a spiral blade; the motor box is characterized by further comprising a shell, a fixing plate, a spring and an auxiliary plate, wherein a placing cavity is formed in the shell, an opening is formed in the left end of the shell and communicated with the placing cavity, the left end of the shell is connected with the central area of the right side wall of the box body, a sound insulation pad is arranged on the inner side wall of the shell, the left end of the fixing plate is connected with the upper half area of the right side wall of the box body, the bottom end of the auxiliary plate is connected with the top end of a motor, the top end of the spring is connected with the central area of the bottom end.

The utility model discloses a manual sprayer of backpack still includes four group's landing legs, four group's landing leg tops are connected with box bottom left front side, right front side, left rear side and right rear side respectively.

The utility model discloses a backpack hand sprayer still includes the handle, the handle left end is connected with casing right side wall first region.

The utility model discloses a manual sprayer of backpack still includes the pull ring, the pull ring bottom is connected with case lid top central authorities region.

The utility model discloses a manual atomizer of backpack still includes rubber cushion, the rubber cushion top is connected with the motor bottom, and rubber cushion bottom and half regional connection on the right side on backup pad top.

The utility model discloses a manual sprayer of backpack, lateral wall central zone is provided with the observation hole before the box to be provided with the transparent plate in observation hole department.

The utility model discloses a backpack hand sprayer, the first region of rocker lateral wall is provided with the slipmat.

The utility model discloses a backpack hand sprayer, half regional ventilation hole that vertically is provided with on the right side of casing top.

Compared with the prior art, the beneficial effects of the utility model are that: opening the box cover, pouring medicament and clean water into the working cavity according to a certain proportion, electrifying the motor, driving the transmission shaft to rotate, driving the helical blade to rotate by the transmission shaft, mixing and stirring the clean water and the medicament in the working cavity by the helical blade, arranging an external braces on the box body, bearing the box body by an operator through the external braces, connecting the output end of the water outlet pipe with the input end of an external spray head, holding the top end of a rocker by the operator, enabling the rocker to rotate in a reciprocating manner at an angle of 90 degrees, enabling the piston to reciprocate up and down in the inner cavity through the action of a movable rod, a connecting rod and a sliding rod, enabling the liquid in the working cavity to only flow into the inner cavity by a first one-way valve, enabling the liquid in the inner cavity to only flow out from the water outlet pipe by a second one-way valve, enabling the mixed liquid extruded from the water outlet pipe to be sprayed out from the output end of the external spray head, and enabling the shell to play a dustproof role on the motor, and because the inner side wall of the shell is provided with the sound insulation pad, the noise generated in the running process of the motor can be isolated, the auxiliary plate is pressed at the top end of the motor through the elastic force of the spring, the vibration generated in the running process of the motor can be relieved through the elastic force of the spring, the vibration and the noise of the motor can be effectively reduced, and the use reliability is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is an enlarged view of a portion B of FIG. 1;

FIG. 4 is a schematic view showing the connection between the case and the transparent plate;

in the drawings, the reference numbers: 1. a box body; 2. a barrel; 3. a piston; 4. a slide bar; 5. a connecting rod; 6. a movable rod; 7. rotating the rod; 8. a rocker; 9. a support plate; 10. a motor; 11. a box cover; 12. a ball bearing; 13. a water inlet pipe; 14. a first check valve; 15. a water outlet pipe; 16. a second one-way valve; 17. a drive shaft; 18. a helical blade; 19. a housing; 20. a fixing plate; 21. a spring; 22. an auxiliary plate; 23. a sound insulating pad; 24. a support leg; 25. a handle; 26. a pull ring; 27. a rubber cushion block; 28. a transparent plate; 29. a non-slip mat; 30. a vent hole.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in figures 1 to 4, the utility model discloses a knapsack manual sprayer, which comprises a box body 1, a cylinder body 2, a piston 3, a sliding rod 4, a connecting rod 5, a movable rod 6, a rotating rod 7, a rocker 8, a supporting plate 9 and a motor 10, wherein a working chamber is arranged inside the box body 1, a box opening is arranged in the central area of the top end of the box body 1, the box opening is communicated with the working chamber, a box cover 11 can be detachably arranged at the box opening, an upper connecting hole and a lower connecting hole are respectively and longitudinally arranged in the left half areas of the top end and the bottom end of the box body 1, the bottom end of the cylinder body 2 sequentially passes through the upper connecting hole, the working chamber and the lower connecting hole, the cylinder body 2 is hermetically connected with the inner side wall of the upper connecting hole and the lower connecting hole, an inner cavity is arranged inside the cylinder body 2, a sliding hole is longitudinally arranged in the central area of the top end of the cylinder body 2, the piston 3 is transversely slidably fixed in the inner cavity, the bottom end of the sliding rod 4 passes through the sliding hole and is connected with the central area of the top end of the piston 3, the left end and the right end of a connecting rod 5 are respectively hinged with the top ends of a movable rod 6 and a sliding rod 4, the lower half area of the left side wall of a box body 1 is provided with a rotating groove, the right end of a rotating rod 7 is inserted into the rotating groove and is provided with a ball bearing 12 between the inner side wall of the rotating groove, the bottom end of a rocker 8 is connected with the left half area of the top end of the rotating rod 7, the bottom end of the movable rod 6 is rotatably hinged with the central area of the rocker 8, the lower half area of the right side wall of a cylinder body 2 is communicated with a water inlet pipe 13 and is provided with a first one-way valve 14, the central area of the bottom end of the cylinder body 2 is communicated with a water outlet pipe 15, a second one-way valve 16 is arranged on the water outlet pipe 15, the central area of the right side wall of the box body 1 is transversely provided with a rotating hole, the left end of a supporting plate 9 is connected with the lower half area of the right side wall of the box body 1, a motor 10 is arranged at the top end of the supporting plate 9, the left output end of the motor 10 is provided with a transmission shaft 17, the left end of the transmission shaft 17 passes through the rotating hole and extends into a working cavity, a mechanical seal is arranged between the transmission shaft 17 and the inner side wall of the rotating hole, and a helical blade 18 is arranged in the left half area of the outer side wall of the transmission shaft 17; the motor is characterized by further comprising a shell 19, a fixing plate 20, a spring 21 and an auxiliary plate 22, wherein a placing cavity is formed in the shell 19, an opening is formed in the left end of the shell 19 and communicated with the placing cavity, the left end of the shell 19 is connected with the central area of the right side wall of the box body 1, a sound insulation pad 23 is arranged on the inner side wall of the shell 19, the left end of the fixing plate 20 is connected with the upper half area of the right side wall of the box body 1, the bottom end of the auxiliary plate 22 is connected with the top end of the motor 10, the top end of the spring 21 is connected with the central area of the bottom end of the fixing plate 20, and the bottom end of the spring 21 is connected with the central area of the top end of the auxiliary plate 22; opening the box cover, pouring medicament and clean water into the working cavity according to a certain proportion, electrifying the motor, driving the transmission shaft to rotate, driving the helical blade to rotate by the transmission shaft, mixing and stirring the clean water and the medicament in the working cavity by the helical blade, arranging an external braces on the box body, bearing the box body by an operator through the external braces, connecting the output end of the water outlet pipe with the input end of an external spray head, holding the top end of a rocker by the operator, enabling the rocker to rotate in a reciprocating manner at an angle of 90 degrees, enabling the piston to reciprocate up and down in the inner cavity through the action of a movable rod, a connecting rod and a sliding rod, enabling the liquid in the working cavity to only flow into the inner cavity by a first one-way valve, enabling the liquid in the inner cavity to only flow out from the water outlet pipe by a second one-way valve, enabling the mixed liquid extruded from the water outlet pipe to be sprayed out from the output end of the external spray head, and enabling the shell to play a dustproof role on the motor, and because the inner side wall of the shell is provided with the sound insulation pad, the noise generated in the running process of the motor can be isolated, the auxiliary plate is pressed at the top end of the motor through the elastic force of the spring, the vibration generated in the running process of the motor can be relieved through the elastic force of the spring, the vibration and the noise of the motor can be effectively reduced, and the use reliability is improved.

The utility model discloses a knapsack manual sprayer, which also comprises four groups of supporting legs 24, wherein the top ends of the four groups of supporting legs 24 are respectively connected with the left front side, the right front side, the left rear side and the right rear side of the bottom end of the box body 1; four groups of supporting legs can support the box body, and the use stability is improved.

The backpack type manual sprayer of the utility model also comprises a handle 25, the left end of the handle 25 is connected with the upper half area of the right side wall of the shell 19; the handle can be convenient for the staff to install and dismantle the casing, improves the convenience of use.

The backpack manual sprayer of the utility model also comprises a pull ring 26, the bottom end of the pull ring 26 is connected with the central area of the top end of the box cover 11; the pull ring can facilitate the opening and closing of the box cover, and the use convenience is improved.

The utility model discloses a knapsack manual sprayer, which also comprises a rubber cushion block 27, the top end of the rubber cushion block 27 is connected with the bottom end of the motor 10, and the bottom end of the rubber cushion block 27 is connected with the right half area of the top end of the supporting plate 9; the rubber cushion block is made of soft materials, so that the damping and noise reduction effects on the motor can be further enhanced, and the use reliability is improved.

The utility model relates to a knapsack manual sprayer, the central area of the front side wall of a box body 1 is provided with an observation hole, and a transparent plate 28 is arranged at the observation hole; the transparent plate can be convenient for the staff to observe the liquid level in the working chamber, improves and uses the controllability.

The utility model relates to a knapsack manual sprayer, the upper half area of the outer side wall of a rocker 8 is provided with a non-slip mat 29; the non-slip mat can protect the palm of the worker, and the use safety is improved.

The right half area of the top end of the shell 19 of the knapsack manual sprayer of the utility model is longitudinally provided with a vent hole 30; the ventilation hole can make the slow flow of air of placing the intracavity, prevents to place the temperature of intracavity too high, prolongs the life of motor.

The utility model discloses a backpack manual sprayer, it is at the during operation, open the case lid, pour medicament and clear water into the work intracavity according to certain proportion, the motor circular telegram, motor drive transmission shaft rotates, the transmission shaft drives helical blade and rotates, helical blade mixes the stirring to clear water and medicament in the work intracavity, the box is provided with external braces, the staff is piggybacked the box on one's body through external braces, the outlet pipe output is connected with external atomising head input, the staff holds the rocker top, make the rocker reciprocate at 90 degrees angle, through the action of movable rod, connecting rod and slide bar make the piston reciprocate from top to bottom in the inner chamber, first check valve makes the liquid in the work intracavity can only flow into the inner chamber, the second check valve makes the liquid in the inner chamber can only flow out from the outlet pipe, the mixed liquid that extrudes from the outlet pipe spouts from external atomising head output, the shell can play a dustproof role in the motor, and the noise generated in the running process of the motor can be isolated due to the fact that the sound insulation pad is arranged on the inner side wall of the shell, the auxiliary plate is pressed at the top end of the motor through the elastic force of the spring, and the vibration generated in the running process of the motor can be relieved through the elastic force of the spring, so that the vibration and the noise of the motor can be effectively reduced, and the use reliability is improved; the four groups of supporting legs can support the box body, so that the use stability is improved; the handle can facilitate the installation and the disassembly of the shell by workers, and the use convenience is improved; the pull ring can facilitate the opening and closing of the box cover, and the use convenience is improved; the rubber cushion block is made of soft materials, so that the damping and noise reduction effects on the motor can be further enhanced, and the use reliability is improved; the transparent plate can facilitate the staff to observe the liquid level in the working cavity, so that the use controllability is improved; the non-slip mat can protect the palm of a worker, so that the use safety is improved; the ventilation hole can make the slow flow of air of placing the intracavity, prevents to place the temperature of intracavity too high, prolongs the life of motor.

The utility model discloses a motor that manual atomizer of backpack used is from purchasing on the market, only need install according to the description use can.

The utility model discloses a manual sprayer of backpack, it is above the mounting means, the connected mode or the mode that sets up of all parts are common mechanical system to the concrete structure, model and the coefficient index of all its parts are its from taking the technique, as long as can reach all can implementing of its beneficial effect, so do not add at many and give unnecessary details.

The backpack manual sprayer of the utility model, under the condition that the opposite explanation is not made, the orientation words contained in the terms such as "up, down, left, right, front, back, inside and outside, vertical and horizontal" only represent the orientation of the term under the normal use state, or be a trivial term understood by those skilled in the art, and should not be considered as limiting the term, at the same time, the numerical terms "first," "second," and "third," etc. do not denote any particular quantity or order, but rather are used to distinguish one from another, furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A knapsack manual sprayer comprises a box body (1), a cylinder body (2), a piston (3), a sliding rod (4), a connecting rod (5), a movable rod (6), a rotating rod (7), a rocker (8), a supporting plate (9) and a motor (10), wherein a working chamber is arranged in the box body (1), a box opening is arranged in the central area of the top end of the box body (1), the box opening is communicated with the working chamber, a box cover (11) is detachably arranged at the box opening, an upper connecting hole and a lower connecting hole are respectively and longitudinally arranged in the left half areas of the top end and the bottom end of the box body (1), the bottom end of the cylinder body (2) sequentially penetrates through the upper connecting hole, the working chamber and the lower connecting hole, the cylinder body (2) is hermetically connected with the inner side wall of the upper connecting hole and the inner side wall of the lower connecting hole, an inner cavity is arranged in the inner part of the cylinder body (2), the central area of the top end of the cylinder body (2) is longitudinally provided with the sliding hole, the piston (3) can be transversely fixed in the inner cavity in a sliding way, the bottom end of a sliding rod (4) penetrates through a sliding hole and is connected with the central area of the top end of a piston (3), the left end and the right end of a connecting rod (5) are respectively hinged with a movable rod (6) and the top end of the sliding rod (4), the lower half area of the left side wall of a box body (1) is provided with a rotating groove, the right end of a rotating rod (7) is inserted into the rotating groove and is provided with a ball bearing (12) between the inner side wall of the rotating groove, the bottom end of a rocker (8) is connected with the left half area of the top end of the rotating rod (7), the bottom end of the movable rod (6) is rotatably hinged with the central area of the rocker (8), the lower half area of the right side wall of a cylinder body (2) is communicated with a water inlet pipe (13), a first one-way valve (14) is arranged on the water inlet pipe (13), the central area of the bottom end of the cylinder body (2) is communicated with a water outlet pipe (15), a second one-way valve (16) is arranged on the water outlet pipe (15), the central area of the right side wall of the box body (1) is transversely provided with a rotating hole, the left end of the supporting plate (9) is connected with the lower half area of the right side wall of the box body (1), the motor (10) is installed at the top end of the supporting plate (9), the output end of the left part of the motor (10) is provided with a transmission shaft (17), the left end of the transmission shaft (17) penetrates through the rotating hole and extends into the working cavity, mechanical sealing is carried out between the transmission shaft (17) and the inner side wall of the rotating hole, and the left half area of the outer side wall of the transmission shaft (17) is provided with a helical blade (18); the novel cabinet is characterized by further comprising a shell (19), a fixing plate (20), a spring (21) and an auxiliary plate (22), wherein a placing cavity is formed in the shell (19), an opening is formed in the left end of the shell (19) and communicated with the placing cavity, the left end of the shell (19) is connected with the central area of the right side wall of the cabinet (1), a sound insulation pad (23) is arranged on the inner side wall of the shell (19), the left end of the fixing plate (20) is connected with the upper half area of the right side wall of the cabinet (1), the bottom end of the auxiliary plate (22) is connected with the top end of the motor (10), the top end of the spring (21) is connected with the central area of the bottom end of the fixing plate (20), and the bottom end of the spring (21) is connected with the central area of the top end of the auxiliary plate (22).

2. A hand-operated knapsack sprayer according to claim 1, further comprising four sets of legs (24), the top ends of said four sets of legs (24) being connected to the left front side, the right front side, the left rear side and the right rear side of the bottom end of the box body (1), respectively.

3. A hand-operated knapsack sprayer according to claim 2, characterized in that it further comprises a handle (25), the left end of said handle (25) being connected to the upper half-area of the right side wall of the casing (19).

4. A hand-operated knapsack sprayer according to claim 3, further comprising a pull ring (26), the bottom end of said pull ring (26) being connected to the central region of the top end of the lid (11).

5. The hand sprayer with knapsack according to claim 4, characterized in that it further comprises a rubber pad (27), the top of said rubber pad (27) is connected to the bottom of the motor (10), and the bottom of said rubber pad (27) is connected to the right half area of the top of the supporting plate (9).

6. A hand sprayer as in claim 5, characterised in that the box (1) is provided with a viewing aperture in the central region of the front side wall and a transparent plate (28) at the viewing aperture.

7. A hand sprayer as in claim 6, characterised in that the rocker (8) is provided with a non-slip pad (29) in the upper half of its outer side wall.

8. A hand-operated knapsack sprayer according to claim 7, characterized in that the right half of the top end of the housing (19) is provided longitudinally with a vent (30).