Box-type activated carbon filter material device for waste gas carbon box
By designing a box-type activated carbon filter device, the distance between the tooth plate and the slide plate is controlled by the rotating connecting plate to realize the rapid loading and removal of activated carbon, the problem of cumbersome and time-consuming replacement of activated carbon in the prior art is solved, and the efficiency and convenience of replacing activated carbon is improved.
Patent Information
- Application Number
- CN202421307068.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-11
AI Technical Summary
In the prior art, it takes time to unpack the bagged activated carbon when replacing activated carbon, and it is necessary to transport the activated carbon to the facility, resulting in the process of replacing activated carbon cumbersome and time-consuming.
A box-type activated carbon filter device for exhaust gas carbon boxes is designed. By rotating the connecting plate, the threaded rod controls the distance between the tooth plate and the slide plate, and the device can quickly install and disassemble the slide plate, simplifying the loading and removal of activated carbon.
It shortens the time required for replacing activated carbon, improves the convenience of replacing activated carbon during exhaust gas treatment, and reduces the workload and time of operators.
Smart Images

Figure CN222605886U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of filter material devices, in particular to a box-type activated carbon filter material device for an exhaust gas carbon box. Background Art
[0002] Waste gas treatment is an important means of environmental protection. It uses various technical methods and equipment to remove or reduce harmful substances in waste gas generated by industrial production, combustion processes, etc. to the allowable emission standards to prevent them from polluting the environment.
[0003] There are many types of waste gas treatment equipment, including filters, adsorbers, scrubbers, dryers, etc. Among them, activated carbon is a commonly used waste gas treatment material, which has the characteristics of high adsorption capacity, easy operation and easy maintenance.
[0004] Existing activated carbon usually needs to be replaced when it has been used for too long. During use and observation, it was found that when replacing the activated carbon, it takes time to unpack the bagged activated carbon, and after unpacking, the activated carbon needs to be transported to the facility. This increases the tediousness of the activated carbon replacement work and increases the working time required for activated carbon replacement.
[0005] Therefore, in order to solve the above problems, a box-type activated carbon filter device for an exhaust gas carbon box is proposed. Utility Model Content
[0006] To this end, the technical problem to be solved by the utility model is to overcome the problem in the prior art that when replacing activated carbon, it takes time to unpack the bagged activated carbon, and after unpacking, the activated carbon needs to be transported to the inside of the facility.
[0007] In order to solve the above technical problems, the utility model provides a box-type activated carbon filter device for an exhaust gas carbon box, comprising a support plate; four mesh plates are fixedly connected to the top of the support plate; the adjacent mesh plates are in a fixed relationship; the tops of the adjacent mesh plates are fixedly connected to slide rails; the slide rail is a C-shaped structure; a slide plate is arranged between the adjacent slide rails; a plurality of teeth are symmetrically fixedly connected to the middle part of the slide plate; a threaded rod is threadedly connected to the middle part of the slide rail; a connecting plate is fixedly connected to the end of the threaded rod; a plurality of first springs are fixedly connected to the inner side wall of the slide rail; a tooth plate is fixedly connected to the end of the adjacent first spring; the tooth plate and the slide rail are slidably connected; through the above structure, the connecting plate is rotated so that the threaded rod can control the distance between the tooth plate and the slide plate and thus affect the bite relationship between the teeth and the tooth plate, so as to realize the rapid installation and disassembly of the slide plate by the device, so that the device can quickly load or remove the activated carbon, shorten the time required for replacing the activated carbon, and improve the convenience of replacing the activated carbon during exhaust gas treatment.
[0008] In one embodiment of the utility model, a plurality of lifting plates are symmetrically fixed to the middle of the slide rail; a plurality of sliding rods are slidably connected to the middle of the lifting plates; a second spring is fixed to the end of the sliding rod; the other end of the sliding rod is rotatably connected to the first rotating wheel; through the above structure, after the skateboard and the first rotating wheel come into contact, they will be squeezed by the first rotating wheel under the action of the elastic force of the second spring, thereby realizing the guidance and positioning of the direction of the skateboard when the device moves, and improving the convenience and accuracy of the skateboard entering the interior of the slide rail.
[0009] In one embodiment of the utility model, an oil bag is fixedly connected to the middle part of the first rotating wheel; a plurality of circular holes are opened in the middle part of the oil bag; through the above structure, when the skateboard and the first rotating wheel come into contact, they will also come into contact with the oil bag and squeeze the oil bag, and after the oil bag is squeezed, the lubricating oil inside will flow out from the circular holes and reach the surface of the skateboard, and the lubricating oil will reach the surface of the biting teeth and lubricate the biting tooth surface, thereby improving the smoothness of the biting tooth surface and reducing the jamming that occurs when the skateboard moves.
[0010] In one embodiment of the utility model, a plurality of brushes are fixedly connected to the middle of the circular hole; the brushes are arranged in a circular array; through the above structure, when the skateboard contacts the oil bag, the brushes will also contact the brushes, and when the brushes and the skateboard surface rub against each other, the tooth surface will be cleaned and the lubricating oil on the tooth surface will be applied, so that the lubricating oil on the tooth surface is more uniform, thereby enhancing the lubricating effect of the oil bag on the tooth surface.
[0011] In one embodiment of the utility model, a baffle is fixedly connected to the middle part of the pick plate; the baffle is an arc-shaped structure; the middle part of the baffle is rotatably connected to a plurality of second rotating wheels; through the above structure, when the skateboard reaches the pick plate, it will first slide along the surface of the baffle, so as to realize the pre-positioning of the skateboard by the device, reduce the collision caused by direct contact between the skateboard and the slide rod when the skateboard moves, reduce the impact of the skateboard on the slide rod, and extend the service life of the slide rod.
[0012] In one embodiment of the utility model, a sponge is fixedly connected to the middle of the second rotating wheel; the sponge is located between the baffle and the second rotating wheel; through the above structure, when the skateboard comes into contact with the second rotating wheel, the skateboard will also come into contact with the sponge, and when the sponge and the skateboard come into contact, the surface of the skateboard will be cleaned, thereby reducing dust on the surface of the skateboard and improving the cleanliness of the surface of the skateboard.
[0013] In one embodiment of the utility model, a plurality of first fixing holes are opened in the middle of the connecting plate; a plurality of second fixing holes are opened in the middle of the sliding rail; the first fixing holes and the second fixing holes are arranged correspondingly; through the above structure, the staff can insert the pin into the first fixing hole so that the pin passes through the first fixing hole and enters the second fixing hole, and then the connecting plate will be affected by the friction between the pin and the second fixing hole and be fixed, thereby improving the stability of the connecting plate when it stops.
[0014] In one embodiment of the utility model, a plurality of protrusions are fixedly connected to the middle portion of the connecting plate; the protrusions are arranged in a circular array; through the above structure, when the staff rotates the connecting plate protrusions, the contact area between the connecting plate and the staff will be increased, the friction force when the staff rotates the connecting plate will be increased, and the convenience of rotating the connecting plate will be improved.
[0015] The above technical solution of the utility model has the following advantages compared with the prior art:
[0016] 1. The utility model describes a box-type activated carbon filter device for an exhaust carbon box. The connecting plate is rotated so that the threaded rod can control the distance between the tooth plate and the slide plate, thereby affecting the engagement relationship between the teeth and the tooth plate, thereby realizing the rapid installation and removal of the slide plate by the device, so that the device can quickly load or remove the activated carbon, shortening the time required for replacing the activated carbon and improving the convenience of replacing the activated carbon during exhaust gas treatment.
[0017] 2. In the box-type activated carbon filter device for an exhaust carbon box described in the utility model, after the slide plate contacts the first rotating wheel, it will be squeezed by the first rotating wheel under the elastic force of the second spring, so that the device can guide and position the slide plate when it moves, thereby improving the convenience and accuracy of the slide plate entering the interior of the slide rail. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.
[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0020] Figure 2 It is a structural schematic diagram of the slide plate in the utility model;
[0021] Figure 3 It is a structural schematic diagram of the connecting plate in the utility model;
[0022] Figure 4 This is a schematic diagram of the structure of the baffle in the utility model;
[0023] Figure 5 It is a structural schematic diagram of the slide bar in the utility model.
[0024] Explanation of the reference numerals in the drawings in the specification: 1. Support plate; 12. Mesh plate; 13. Slide rail; 14. Slide plate; 15. Gear; 16. Threaded rod; 17. Connecting plate; 18. First spring; 19. Tooth plate; 2. Pick plate; 22. Slide rod; 23. Second spring; 24. First rotating wheel; 3. Oil bag; 32. Round hole; 4. Brush; 5. Baffle; 52. Second rotating wheel; 6. Sponge; 7. First fixing hole; 72. Second fixing hole; 8. Bump. DETAILED DESCRIPTION
[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.
[0026] Reference Figures 1 to 3As shown, a box-type activated carbon filter device for an exhaust gas carbon box of the utility model comprises a support plate 1; four mesh plates 12 are fixedly connected to the top of the support plate 1; the adjacent mesh plates 12 are fixedly connected; the tops of the adjacent mesh plates 12 are fixedly connected to a slide rail 13; the slide rail 13 is a C-shaped structure; a slide plate 14 is arranged between the adjacent slide rails 13; a plurality of teeth 15 are symmetrically fixedly connected to the middle of the slide plate 14; a threaded rod 16 is threadedly connected to the middle of the slide rail 13; a connecting plate 17 is fixedly connected to the end of the threaded rod 16; the inner side of the slide rail 13 A plurality of first springs 18 are fixedly connected to the wall; a tooth plate 19 is fixedly connected to the end of the adjacent first spring 18; the tooth plate 19 and the slide rail 13 are slidably connected; when working, the activated carbon is unpacked and poured into the device, and then the staff can take out the slide plate 14 and put the slide plate 14 into the slide rail 13. At the same time, the staff can rotate the connecting plate 17 so that the connecting plate 17 drives the threaded rod 16 to rotate together. When the threaded rod 16 rotates, it will move along the slide rail 13. When the threaded rod 16 moves, it will contact and squeeze the tooth plate 19, and the tooth plate 19 will press The first spring 18 is in a stretched state when the tooth plate 19 moves, until the tooth plate 19 contacts the slide plate 14, at which time the tooth plate 19 engages with the bite teeth 15. When the slide plate 14 completely enters the slide rail 13, the slide plate 14 is fixed by the friction between the bite teeth 15 and the tooth plate 19, and the slide plate 14 completes the closure of the device. Finally, the staff can carry the device to the exhaust gas treatment site. When the slide plate 14 needs to be pulled out, the staff can reversely rotate the connecting plate 17 to move the threaded rod 16 away from the tooth plate 19, and the tooth plate 19 engages with the bite teeth 15. The plate 19 will reset and move away from the biting tooth 15 under the elastic force of the first spring 18. The slide plate 14 will be in an active state after losing the friction between the biting tooth 15 and the tooth plate 19. At this time, the staff can pull out the slide plate 14; rotate the connecting plate 17 so that the threaded rod 16 can control the distance between the tooth plate 19 and the slide plate 14, thereby affecting the bite relationship between the biting tooth 15 and the tooth plate 19, so as to realize the rapid installation and disassembly of the slide plate 14 by the device, so that the device can quickly load or remove the activated carbon, shorten the time required for replacing the activated carbon, and improve the convenience of replacing the activated carbon during exhaust gas treatment.
[0027] Reference Figure 1 and Figure 4As shown, a plurality of lifting plates 2 are symmetrically fixedly connected to the middle of the slide rail 13; a plurality of sliding rods 22 are slidably connected to the middle of the lifting plate 2; a second spring 23 is fixedly connected to the end of the sliding rod 22; the other end of the sliding rod 22 is rotatably connected to the first rotating wheel 24; when the staff sends the slide plate 14 into the slide rail 13, the slide plate 14 will contact with the sliding rod 22 during the movement and squeeze the sliding rod 22. After the sliding rod 22 is subjected to the pressure, it will slide along the lifting plate 2 and put the second spring 23 in a stretched state. When the slide plate 14 contacts the sliding rod 22, it will also contact with the first rotating wheel 24 and make the first rotating wheel 24 The second spring 23 releases elastic potential energy and applies elastic force to the slide bar 22, which transmits the elastic force to the first rotating wheel 24 so that the first rotating wheel 24 squeezes the slide plate 14. The slide plate 14 is squeezed by the first rotating wheel 24 and its moving trajectory is changed, so that the slide plate 14 can enter the interior of the slide rail 13 more accurately. After the slide plate 14 contacts the first rotating wheel 24, it is squeezed by the first rotating wheel 24 under the elastic force of the second spring 23, so that the device can guide and position the direction of the slide plate 14 when it moves, thereby improving the convenience and accuracy of the slide plate 14 entering the interior of the slide rail 13.
[0028] Reference Figure 5 As shown, an oil bag 3 is fixedly connected to the middle of the first rotating wheel 24; a plurality of circular holes 32 are opened in the middle of the oil bag 3; when the slide plate 14 contacts the first rotating wheel 24, it also contacts the oil bag 3 and squeezes the oil bag 3. After the oil bag 3 is squeezed, the lubricating oil inside will flow out from the circular holes 32 and reach the surface of the slide plate 14. The lubricating oil will reach the surface of the biting tooth 15 and lubricate the surface of the biting tooth 15, thereby improving the smoothness of the surface of the biting tooth 15 and reducing the jamming that occurs when the slide plate 14 moves.
[0029] Reference Figure 5 As shown, a plurality of brushes 4 are fixedly connected to the middle of the circular hole 32; the brushes 4 are arranged in a circular array; when the slide plate 14 contacts the oil bag 3, it will also contact the brush 4. When the brush 4 and the surface of the slide plate 14 generate friction, the surface of the tooth 15 will be cleaned and the lubricating oil on the surface of the tooth 15 will be brushed, so that the lubricating oil on the surface of the tooth 15 is more uniform, thereby enhancing the lubricating effect of the oil bag 3 on the surface of the tooth 15.
[0030] Reference Figure 4As shown, a baffle 5 is fixedly connected to the middle part of the pick plate 2; the baffle 5 is an arc-shaped structure; the middle part of the baffle 5 is rotatably connected to a plurality of second rotating wheels 52; when the slide plate 14 moves to the pick plate 2, the slide plate 14 will first contact the baffle 5 and move along the surface of the baffle 5, and the slide plate 14 will also contact the second rotating wheel 52 and make the second rotating wheel 52 rotate, the second rotating wheel 52 will convert the sliding friction between the slide plate 14 and the baffle 5 into rolling friction, and the slide plate 14 will contact the slide bar 22 and squeeze the first rotating wheel 24 after passing through the baffle 5; through the cooperation of the baffle 5 and the second rotating wheel 52, the slide plate 14 will first slide along the surface of the baffle 5 when it arrives at the pick plate 2, so as to realize the pre-positioning of the slide plate 14 by the device, reduce the collision caused by the direct contact between the slide plate 14 and the slide bar 22 when moving, reduce the impact of the slide plate 14 on the slide bar 22, and extend the service life of the slide bar 22.
[0031] Reference Figure 4 As shown, a sponge 6 is fixedly connected to the middle of the second rotating wheel 52; the sponge 6 is located between the baffle 5 and the second rotating wheel 52; when the skateboard 14 contacts the second rotating wheel 52, the skateboard 14 will also contact the sponge 6. When the sponge 6 contacts the skateboard 14, the surface of the skateboard 14 will be cleaned, thereby reducing dust on the surface of the skateboard 14 and improving the cleanliness of the surface of the skateboard 14.
[0032] Reference Figure 3 As shown, a plurality of first fixing holes 7 are opened in the middle of the connecting plate 17; a plurality of second fixing holes 72 are opened in the middle of the slide rail 13; the first fixing holes 7 and the second fixing holes 72 are arranged correspondingly; the staff rotates the connecting plate 17 to move the threaded rod 16 along the slide rail 13, and when the connecting plate 17 is rotated, the staff can insert the pin into the first fixing hole 7 so that the pin passes through the first fixing hole 7 and enters the second fixing hole 72, and then the connecting plate 17 is affected by the friction between the pin and the second fixing hole 72 and is fixed, thereby improving the stability of the connecting plate 17 when it stops.
[0033] Reference Figure 3 As shown, a plurality of protrusions 8 are fixedly connected to the middle part of the connecting plate 17; the protrusions 8 are arranged in a circular array; when the staff rotates the connecting plate 17, the palm of the staff will come into contact with the protrusions 8, and the protrusions 8 will increase the contact area between the connecting plate 17 and the staff, thereby increasing the friction force when the staff rotates the connecting plate 17 and improving the convenience of rotating the connecting plate 17.
[0034] Working principle: After unpacking the activated carbon, pour it into the device, then the staff can take out the slide plate 14 and put the slide plate 14 into the slide rail 13, and at the same time the staff can rotate the connecting plate 17 so that the connecting plate 17 drives the threaded rod 16 to rotate together, and the threaded rod 16 will move along the slide rail 13 when it rotates, and the threaded rod 16 will contact and squeeze the tooth plate 19 when it moves, and the tooth plate 19 will slide along the inner wall of the slide rail 13 under the action of pressure, and the tooth plate 19 will put the first spring 18 in a stretched state when it moves, until the tooth plate 19 and the slide plate 14 come into contact, and at this time the tooth plate 19 will bite with the biting teeth 15, and when the slide plate 14 completely enters the slide rail 13, the slide plate 14 will be fixed by the friction between the biting teeth 15 and the tooth plate 19, The slide plate 14 completes the closure of the device, and finally the staff can carry the device to the exhaust gas treatment site. When the slide plate 14 needs to be pulled out, the staff can reversely rotate the connecting plate 17 to make the threaded rod 16 move away from the tooth plate 19. The tooth plate 19 will be reset and away from the biting tooth 15 under the elastic force of the first spring 18. The slide plate 14 will be in an active state after losing the friction between the biting tooth 15 and the tooth plate 19. At this time, the staff can pull out the slide plate 14; when the staff sends the slide plate 14 into the slide rail 13, the slide plate 14 will come into contact with the slide bar 22 during the movement and squeeze the slide bar 22. After the slide bar 22 is subjected to pressure, it will slide along the pick plate 2 and put the second spring 23 in a stretched state. When the slide plate 14 and the slide bar 22 come into contact, they will also be in contact with the first rotating wheel 2 4 makes contact with the first rotating wheel 24 and makes the first rotating wheel 24 rotate under the action of friction, then the second spring 23 releases elastic potential energy and applies elastic force to the sliding rod 22, the sliding rod 22 transmits the elastic force to the first rotating wheel 24 so that the first rotating wheel 24 squeezes the sliding plate 14, and the moving trajectory of the sliding plate 14 changes after being squeezed by the first rotating wheel 24, so that the sliding plate 14 can enter the interior of the sliding rail 13 more accurately; when the sliding plate 14 and the first rotating wheel 24 come into contact, they will also come into contact with the oil bag 3 and squeeze the oil bag 3, and after the oil bag 3 is squeezed, the lubricating oil inside will flow out from the circular hole 32 and reach the surface of the sliding plate 14, and the lubricating oil will reach the surface of the biting tooth 15 and lubricate the surface of the biting tooth 15, thereby improving the smoothness of the surface of the biting tooth 15 and reducing the sliding plate 14. The jamming occurs when the slide plate 14 contacts the oil bag 3 and also contacts the brush 4. When the brush 4 and the surface of the slide plate 14 generate friction, the surface of the biting teeth 15 is cleaned and the lubricating oil on the surface of the biting teeth 15 is brushed, so that the lubricating oil on the surface of the biting teeth 15 is more evenly distributed, and the lubricating effect of the oil bag 3 on the surface of the biting teeth 15 is enhanced; when the slide plate 14 moves to the pick plate 2, the slide plate 14 will first contact the baffle plate 5 and move along the surface of the baffle plate 5, and the slide plate 14 will also contact the second rotating wheel 52 and make the second rotating wheel 52 rotate. The second rotating wheel 52 converts the sliding friction between the slide plate 14 and the baffle plate 5 into rolling friction, and after the slide plate 14 passes through the baffle plate 5, it will contact the slide bar 22 and squeeze the first rotating wheel 24;When the slide plate 14 and the second rotating wheel 52 come into contact, the slide plate 14 will also come into contact with the sponge 6. When the sponge 6 and the slide plate 14 come into contact, the surface of the slide plate 14 will be cleaned, the dust on the surface of the slide plate 14 will be reduced, and the cleanliness of the surface of the slide plate 14 will be improved; after the staff rotates the connecting plate 17, the threaded rod 16 moves along the slide rail 13. After the connecting plate 17 is rotated, the staff can insert the latch into the first fixing hole 7 so that the latch passes through the first fixing hole 7 and enters the second fixing hole 72. Then, the connecting plate 17 will be fixed by the friction between the latch and the second fixing hole 72, thereby improving the stability of the connecting plate 17 when it stops; when the staff rotates the connecting plate 17, the palm of the staff will come into contact with the protrusion 8, and the protrusion 8 will increase the contact area between the connecting plate 17 and the staff, thereby increasing the friction when the staff rotates the connecting plate 17. ;
[0035] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.
Claims
1. A box-type activated carbon filter device for an exhaust gas carbon box, comprising a support plate (1), characterized in that: Four mesh plates (12) are fixedly connected to the top of the support plate (1); the adjacent mesh plates (12) are in a fixed relationship; the tops of the adjacent mesh plates (12) are fixedly connected to slide rails (13); the slide rails (13) are of a C-shaped structure; a slide plate (14) is provided between the adjacent slide rails (13); a plurality of teeth (15) are symmetrically fixedly connected to the middle of the slide plate (14); a threaded rod (16) is threadedly connected to the middle of the slide rail (13); a connecting plate (17) is fixedly connected to the end of the threaded rod (16); a plurality of first springs (18) are fixedly connected to the inner side wall of the slide rail (13); a tooth plate (19) is fixedly connected to the end of the adjacent first spring (18); the tooth plate (19) and the slide rail (13) are slidably connected.
2. A box-type activated carbon filter device for an exhaust gas carbon box according to claim 1, characterized in that: A plurality of lifting plates (2) are symmetrically fixedly connected to the middle of the slide rail (13); a plurality of sliding rods (22) are slidably connected to the middle of the lifting plates (2); a second spring (23) is fixedly connected to the end of the sliding rod (22); and the other end of the sliding rod (22) is rotatably connected to a first rotating wheel (24).
3. The box-type activated carbon filter device for an exhaust gas carbon box according to claim 2, characterized in that: An oil bag (3) is fixedly connected to the middle of the first rotating wheel (24); a plurality of circular holes (32) are opened in the middle of the oil bag (3).
4. The box-type activated carbon filter device for an exhaust gas carbon box according to claim 3, characterized in that: A plurality of brushes (4) are fixedly connected to the middle of the circular hole (32); the brushes (4) are arranged in a circular array.
5. The box-type activated carbon filter device for an exhaust gas carbon box according to claim 4, characterized in that: A baffle (5) is fixedly connected to the middle of the pick plate (2); the baffle (5) is an arc-shaped structure; and a plurality of second rotating wheels (52) are rotatably connected to the middle of the baffle (5).
6. The box-type activated carbon filter device for an exhaust gas carbon box according to claim 5, characterized in that: A sponge (6) is fixedly connected to the middle of the second rotating wheel (52); the sponge (6) is located between the baffle (5) and the second rotating wheel (52).
7. The box-type activated carbon filter device for an exhaust gas carbon box according to claim 6, characterized in that: A plurality of first fixing holes (7) are opened in the middle of the connecting plate (17); a plurality of second fixing holes (72) are opened in the middle of the slide rail (13); the first fixing holes (7) and the second fixing holes (72) are arranged correspondingly.
8. The box-type activated carbon filter device for an exhaust gas carbon box according to claim 7, characterized in that: A plurality of protrusions (8) are fixedly connected to the middle of the connecting plate (17); the protrusions (8) are arranged in a circular array.