A multi-layer ventilation filter for the farming industry

Abstract

This utility model discloses a multi-layer ventilation filter for the aquaculture industry, relating to the technical field of air filtration equipment. The utility model includes a mounting frame with several mounting holes on its inner wall. A dustproof plate is slidably connected to the top outer wall of the mounting frame. An adjustment mechanism is provided on the outer wall of the mounting frame, including a rotating shaft. The outer wall of the rotating shaft is rotatably connected to the outer wall of the mounting frame, and a gear disk is rotatably connected to the outer wall of the rotating shaft. By providing mounting holes, this utility model allows the mounting frame to be quickly installed on a wall or external device when needed. The air filter membrane is then fitted onto a support tube, and the support tube is inserted into a limiting block and rotated at a certain angle. This facilitates the user in fixing the air filter membrane to the device and allows for adjustment of the air filter membrane, ensuring it remains taut.

Description

Technical Field

[0001] This utility model belongs to the technical field of air filtration equipment, and in particular relates to a multi-layer ventilation filter for the aquaculture industry. Background Technology

[0002] During the process of raising livestock, workers often encounter diseases among the animals. Airborne transmission is a major route of infection for many pathogens, including porcine reproductive and respiratory syndrome (PRRS), influenza virus, and mycoplasma pneumoniae. These pathogens can travel long distances using atmospheric dust particles or other bioaerosols. By using ventilation and filtration equipment, the airborne transmission of these pathogens can be effectively reduced, thereby lowering the incidence and spread of diseases.

[0003] Existing equipment is inconvenient to fix the air filter membrane during use, and it is also inconvenient to adjust the tightness of the air filter membrane, which may reduce the air filtration efficiency. At the same time, the device is not convenient to pre-treat the air before filtering it, which may cause impurities such as feathers in the air to enter the device and cause the air filter membrane to become clogged. Therefore, we propose a multi-layer ventilation filter for the aquaculture industry. Utility Model Content

[0004] The purpose of this utility model is to provide a multi-layer ventilation filter for the aquaculture industry. By using a dustproof plate, it solves the problems of existing equipment, which makes it inconvenient to fix the air filter membrane during use and adjust the tightness of the air filter membrane, which may reduce the air filtration efficiency. At the same time, the device does not facilitate the pretreatment of air before filtration, which may cause impurities such as feathers in the air to enter the device and cause the air filter membrane to become clogged.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a multi-layer ventilation filter for the aquaculture industry, including a mounting frame. The inner wall of the mounting frame has several mounting holes, a dustproof plate is slidably connected to the top outer wall of the mounting frame, and an adjustment mechanism is provided on the outer wall of the mounting frame.

[0007] The adjustment mechanism includes a rotating shaft, the outer wall of which is rotatably connected to the outer wall of the mounting frame. A gear disk is rotatably connected to the outer wall of the rotating shaft. The inner wall of the mounting frame has several sliding grooves, and a clamping plate is slidably connected to the inner wall of each groove. A rack is fixedly connected to the outer wall of the clamping plate at its outer end, and the outer wall of the rack meshes with the outer wall of the gear disk. The inner wall of each clamping plate has several limiting grooves, and a limiting block is rotatably connected to the inner wall of each limiting groove. A support tube is slidably connected to the inner wall of each limiting block, and an air filter membrane is sleeved on the outer wall of the support tube. A sliding rod is fixedly connected to the outer wall of each clamping plate near the gear disk, and the outer wall of the sliding rod is slidably connected to the inner wall of the clamping plate. A protective mechanism is provided on the outer wall of the mounting frame.

[0008] Furthermore, the protective mechanism includes a second limiting block, the inner wall of which is slidably connected to the outer wall of the dustproof plate, and a plurality of slide rails are fixedly connected to the top outer wall of the second limiting block, and sliders are slidably connected to the inner walls of the plurality of slide rails.

[0009] Furthermore, a threaded rod is rotatably connected to the inner wall of the slider at the rear end, and the outer wall of the threaded rod is rotatably connected to the inner wall of the slide rail. A limit rod is slidably connected to the inner wall of the slider at the outer end, and the outer wall of the limit rod is fixedly connected to the inner wall of the slide rail. A cleaning roller is fixedly connected to the outer wall of the slider, and the outer wall of the cleaning roller is slidably connected to the outer wall of the dustproof plate.

[0010] Furthermore, a second sliding groove is provided on the inner wall of the end of the mounting bracket away from the gear disk. A limiting plate is fixedly connected to the inner wall of the second sliding groove, and a second sliding rod is slidably connected to the inner wall of the limiting plate.

[0011] Furthermore, a spring is fixedly connected to the outer wall of the end of the slide rod away from the limiting plate, and the outer wall of the spring is slidably connected to the outer wall of the limiting plate. A positioning groove is provided on the inner wall of the end of the mounting bracket near the spring.

[0012] Furthermore, a positioning rod is slidably connected to the inner wall of the positioning groove, and the outer wall of the positioning rod is slidably connected to the outer wall of the slide rod. Several arc-shaped sliding grooves are opened on the inner wall of the mounting frame near the positioning rod, and several limiting shafts are fixedly connected to the outer wall of the mounting frame near the arc-shaped sliding grooves.

[0013] Furthermore, a limiting baffle is rotatably connected to the outer wall of the limiting shaft, and a sliding groove three is provided on the inner wall of the limiting baffle. A telescopic rod is fixedly connected to the inner wall of the sliding groove three.

[0014] Furthermore, a limiting rod two is fixedly connected to the outer wall of the telescopic rod, and a spring two is fixedly connected to the outer wall of the limiting rod two near the telescopic rod. The outer wall of the spring two is fixedly connected to the inner wall of the slide groove three, and the outer wall of the limiting rod two is slidably connected to the inner wall of the arc-shaped slide groove.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model features mounting holes, allowing the mounting frame to be quickly installed on a wall or external device when needed. The air filter membrane is then fitted onto the support tube, which is inserted into the limiting block and rotated at a certain angle to install it in the limiting groove, preventing it from falling off. Rotating the rotating shaft causes the gear disc to rotate, resulting in several racks moving simultaneously and in opposite directions. This facilitates user fixation of the air filter membrane to the device and allows for adjustment, ensuring the membrane remains taut and increasing the contact area between the membrane and the air, thus improving the device's air filtration efficiency.

[0017] 2. This utility model incorporates a threaded rod. During operation, rotating the threaded rod causes a slider to slide within a slide rail. This sliding rail, in turn, moves a cleaning roller on a dustproof plate to clean its surface. Simultaneously, the movement of the inner slider, via the cleaning roller, causes the outer slider to slide within the slide rail. A limiting rod restricts the movement trajectory of the outer slider, ensuring smoother movement. This pre-treats the air before filtration, isolating airborne debris such as feathers and preventing them from clogging the air filter and reducing filtration efficiency. Furthermore, it facilitates disassembly and replacement of the device, and allows for cleaning, ensuring its cleanliness.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the limiting block of this utility model;

[0022] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a cross-sectional view of the overall structure of this utility model;

[0024] Figure 5 This utility model Figure 4 Enlarged view at point B in the middle;

[0025] Figure 6 This is a cross-sectional view of the protective mechanism of this utility model;

[0026] Figure 7 This utility model Figure 6 Enlarged view of point C in the middle.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Mounting bracket; 101. Mounting hole; 102. Dustproof plate; 2. Adjustment mechanism; 201. Rotating shaft; 202. Gear disk; 203. Rack; 204. Clamping plate; 205. Limiting slide groove; 206. Limiting block; 207. Support tube; 208. Air filter membrane; 209. Slide rod; 210. Slide groove; 3. Protective mechanism; 301. Limiting block two; 302. Slide rail; 303. 304. Slider; 305. Threaded rod; 306. Limiting rod; 307. Cleaning roller; 308. Second slide groove; 309. Limiting plate; 310. Second slide rod; 311. Spring; 312. Positioning groove; 313. Arc-shaped slide groove; 314. Third slide groove; 315. Telescopic rod; 316. Second spring; 317. Second limiting rod; 318. Limiting shaft; 319. Limiting baffle. Detailed Implementation

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

[0030] Please see Figure 1-7As shown, this utility model is a multi-layer ventilation filter for the aquaculture industry, including a mounting frame 1. The inner wall of the mounting frame 1 has a plurality of mounting holes 101. A dustproof plate 102 is slidably connected to the top outer wall of the mounting frame 1. An adjustment mechanism 2 is provided on the outer wall of the mounting frame 1. The outer wall of the dustproof plate 102 is slidably connected to the outer wall of the mounting frame 1. Through the dustproof plate 102, the air can be pre-treated before the device filters the air, and impurities in the air can be isolated.

[0031] The adjusting mechanism 2 includes a rotating shaft 201, the outer wall of which is rotatably connected to the outer wall of the mounting frame 1. A gear disk 202 is rotatably connected to the outer wall of the rotating shaft 201. The inner wall of the mounting frame 1 has several sliding grooves 210, and a clamping plate 204 is slidably connected to the inner wall of each groove 210. The clamping plate 204 allows adjustment of the position of the support tube 207, and the grooves 210 limit the movement trajectory of the clamping plate 204. A rack 203 is fixedly connected to the outer wall of the outer end clamping plate 204, and the outer wall of the rack 203 meshes with the outer wall of the gear disk 202. The inner wall of the clamping plate 204 has several limiting grooves 205, and a limiting block 206 is rotatably connected to the inner wall of each limiting groove 205. The outer wall of the support tube 207 is slidably connected to the inner wall of the limiting block 206. By installing the support tube 207 within the limiting block 206, the position of the support tube 207 can be adjusted. The position of the support tube 207 is fixed. The inner wall of the limiting block 206 is slidably connected to the support tube 207. The outer wall of the support tube 207 is fitted with an air filter membrane 208. The specific model of the air filter membrane 208 is a HEPA filter, which has the function of effectively capturing suspended particulate matter in the air, such as dust and bacteria, through mechanisms such as inertial effect, sieving effect, interception effect and diffusion effect. Several clamping plates 204 are fixedly connected to the outer wall of one end near the gear disk 202 with a sliding rod 209. The outer wall of the sliding rod 209 is slidably connected to the inner wall of the clamping plate 204. The outer wall of the mounting frame 1 is provided with a protective mechanism 3. The outer wall of the sliding rod 209 of the air filter membrane 208 and the continental shelf are connected by the sliding rod 209. The sliding rod 209 is inserted into 2094 to limit the position of the clamping plate 204, prevent the clamping plate 204 from falling during movement, and make the movement of the clamping plate 204 more stable.

[0032] Rotating the rotating shaft 201 will drive the gear disk 202 to rotate. Since the outer wall of the gear disk 202 meshes with the outer wall of the rack 203, the rotation of the gear disk 202 will drive the rack 203 to rotate, causing the clamping plate 204 to move simultaneously and in opposite directions. This can control the overall position of the support tube 207, tighten the air filter membrane 208, and increase the filtration efficiency of the device.

[0033] The protective mechanism 3 includes a second limiting block 301, the inner wall of which is slidably connected to the outer wall of the dustproof plate 102. Several slide rails 302 are fixedly connected to the top outer wall of the second limiting block 301, and sliders 303 are slidably connected to the inner walls of each slide rail 302. A threaded rod 304 is rotatably connected to the inner wall of the rear slider 303. Rotating the rotating shaft 201 causes the gear disk 202 to rotate. Since the outer wall of the gear disk 202 meshes with the outer wall of the rack 203, the rotation of the gear disk 202 causes the rack 203 to rotate, causing the clamping plate 204 to move simultaneously and in the opposite direction. This controls the overall position of the support tube 207, tightens the air filter membrane 208, and increases the filtration efficiency of the device. The outer wall of the threaded rod 304 is rotatably connected to the inner wall of the slide rail 302. A limiting rod 305 is slidably connected to the inner wall of the outer end slider 303, and the outer wall of the limiting rod 305 is fixed to the inner wall of the slide rail 302. The outer wall of the slider 303 is fixedly connected to a cleaning roller 306. Rotating the rotating shaft 201 will drive the gear disk 202 to rotate. Since the outer wall of the gear disk 202 meshes with the outer wall of the rack 203, the rotation of the gear disk 202 will drive the rack 203 to rotate, causing the clamping plate 204 to move simultaneously and in the opposite direction. This can control the overall position of the support tube 207, tighten the air filter membrane 208, and increase the filtration efficiency of the device. The outer wall of the cleaning roller 306 is slidably connected to the outer wall of the dustproof plate 102. The inner wall of the mounting bracket 1 away from the gear disk 202 is provided with a second sliding groove 307. The inner wall of the second sliding groove 307 is fixedly connected to a limit plate 308. The inner wall of the limit plate 308 is slidably connected to a second sliding rod 309. The outer wall of the second sliding rod 309 is slidably connected to the outer wall of the limit plate 308. When the second sliding rod 309 is pressed down, it will compress the air at the bottom, which will play a certain buffering role.

[0034] Pressing down on the positioning rod 312 causes it to move and compress the slide rod 309, causing it to slide within the limiting plate 308. The downward pressure on the slide rod 309 compresses the air at its bottom, increasing pressure. Simultaneously, the downward pressure compresses the spring 310. After rotating the positioning rod 312 to completely disengage it from the positioning groove 311, release the positioning rod 312. The air at the bottom of the slide rod 309 will then compress the positioning rod 312, causing it to reset. Simultaneously, the spring 310 will exert its elastic force, causing the slide rod 309 to reset, thus pressing against the positioning rod 312 and disengaging it from the limiting plate 308. The positioning rod 312 can then be removed.

[0035] A spring 310 is fixedly connected to the outer wall of the end of the slide rod 309 away from the limiting plate 308. The outer wall of the spring 310 is slidably connected to the outer wall of the limiting plate 308. A positioning groove 311 is provided on the inner wall of the end of the mounting bracket 1 near the spring 310. A positioning rod 312 is slidably connected to the inner wall of the positioning groove 311. The outer wall of the positioning rod 312 fits against the outer wall of the positioning groove 311. By using the positioning groove 311, the positioning rod 312 can be inserted into the positioning groove 311, which can adjust the position of the slide rod 312. The position of the positioning rod 312 is fixed, and the outer wall of the positioning rod 312 is slidably connected to the outer wall of the slide rod 309. Several arc-shaped grooves 313 are formed on the inner wall of the mounting frame 1 near the positioning rod 312. Several limiting shafts 318 are fixedly connected to the outer wall of the mounting frame 1 near the arc-shaped grooves 313. The outer wall of the limiting shafts 318 is fixedly connected to the outer wall of the mounting frame 1. The limiting shafts 318 can limit the movement trajectory of the limiting baffle 319, allowing the limiting baffle to move. Plate 319 can only move in a circular motion around the limiting shaft 318. The outer wall of the limiting shaft 318 is rotatably connected to the limiting baffle 319. The inner wall of the limiting baffle 319 is provided with a sliding groove 314. A telescopic rod 315 is fixedly connected to the inner wall of the sliding groove 314. The telescopic rod 315 can limit the movement trajectory of the second spring 316 to prevent the second spring 316 from breaking during the extension and retraction process. The outer wall of the telescopic rod 315 is fixedly connected to the limiting rod 317. The limiting rod 317 is close to... A spring 316 is fixedly connected to the outer wall of one end of the telescopic rod 315. The outer wall of the spring 316 is fixedly connected to the inner wall of the slide groove 314. The outer wall of the limiting rod 317 is slidably connected to the inner wall of the arc-shaped slide groove 313. Since the depth at both ends of the arc-shaped slide groove 313 is higher than that in the middle, the limiting rod 317 will be stuck by the arc-shaped slide groove 313 when it slides to both ends of the arc-shaped slide groove 313.

[0036] Slightly bend the limiting baffle 319. During the rotation of the limiting baffle 319, the limiting rod 317 will slide in the arc-shaped groove 313. Since the depth at both ends of the arc-shaped groove 313 is higher than that in the middle, the limiting rod 317 will be pushed up by the arc-shaped groove 313 during the movement. At this time, the limiting rod 317 will squeeze the spring 316 to retract. At this time, the limiting baffle 319 can slide normally. When the limiting rod 317 slides to the other end of the arc-shaped groove 313, it will be stuck in the arc-shaped groove 313, limiting the position of the limiting baffle 319. At this time, the dust cover 102 can be taken out normally.

[0037] One specific application of this embodiment is:

[0038] When staff need to use the equipment, the mounting bracket 1 can be quickly installed on the wall or external equipment through the mounting holes 101. Then, the air filter membrane 208 is fitted onto the support tube 207, and the support tube 207 is inserted into the limiting block 206 and rotated a certain angle to install the support tube 207 in the limiting groove 205, preventing it from falling off. Rotating the rotating shaft 201 drives the gear disc 202 to rotate, causing several racks 203 to move simultaneously and in opposite directions. The movement of the racks 203 drives the clamping plate. 204 slides within the groove 210. Simultaneously, the clamping plate 204 moves outward, causing the support tube 207 to move outward, thus tightening the air filter membrane 208. Rotating the threaded rod 304 causes the slider 303 to slide within the slide rail 302. The sliding of the slide rail 302 causes the cleaning roller 306 to move on the dustproof plate 102, cleaning its surface. Simultaneously, when the inner slider 303 moves, it drives the outer slider 303 to slide within the slide rail 302 via the cleaning roller 306. The limiting rod 305 can be aligned. The movement trajectory of the slider 303 at the outer end is limited to make the movement of the slider 303 smoother. When the dust cover 102 needs to be removed for replacement or cleaning, several limit baffles 319 are first turned. The limit baffles 319 or the limit axis 318 move in a left circular motion within the arc-shaped slide groove 313. Since the two ends of the arc-shaped slide groove 313 are deeper than the middle, the turning of the limit baffles 319 will drive the second limit rod 317 to move, causing the second limit rod 317 to be lifted along the arc-shaped slide groove 313. When the second limit rod 317 is lifted, it will compress the second spring 316. The telescopic rod 315 is retracted to prevent the limiting rod 317 from breaking during the telescopic process. Then, the positioning rod 312 is pressed down a certain distance and the arc-shaped slide groove 313 is rotated so that the bottom end of the positioning rod 312 is completely separated from the positioning groove 311. During the downward pressing of the positioning rod 312, the spring 310 is compressed, causing the slide rod 309 to slide within the limiting plate 308. Then, the positioning rod 312 is released. At this time, the spring 310 will automatically reset the slide rod 309 due to the elastic force and push the positioning rod 312 out of the slide groove 307, so that the dustproof plate 102 can be completely removed.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-layer ventilation filter for the aquaculture industry, comprising a mounting bracket (1), characterized in that: The mounting bracket (1) has several mounting holes (101) on its inner wall, a dustproof plate (102) is slidably connected to the top outer wall of the mounting bracket (1), and an adjustment mechanism (2) is provided on the outer wall of the mounting bracket (1). The adjusting mechanism (2) includes a rotating shaft (201), the outer wall of which is rotatably connected to the outer wall of the mounting frame (1). A gear disk (202) is rotatably connected to the outer wall of the rotating shaft (201). The inner wall of the mounting frame (1) has several sliding grooves (210). A clamping plate (204) is slidably connected to the inner wall of the sliding grooves (210). A rack (203) is fixedly connected to the outer wall of the clamping plate (204) at its outer end. The outer wall of the rack (203) meshes with the outer wall of the gear disk (202). The clamping plate (204)... The inner wall of the mounting bracket (1) is provided with several limiting grooves (205). The inner wall of the limiting groove (205) is rotatably connected to a limiting block (206). The inner wall of the limiting block (206) is slidably connected to a support tube (207). The outer wall of the support tube (207) is fitted with an air filter membrane (208). The outer wall of one end of each clamping plate (204) near the gear disk (202) is fixedly connected to a sliding rod (209). The outer wall of the sliding rod (209) is slidably connected to the inner wall of the clamping plate (204). The outer wall of the mounting bracket (1) is provided with a protective mechanism (3).

2. A multi-layer ventilation filter for the aquaculture industry according to claim 1, characterized in that, The protective mechanism (3) includes a limiting block two (301), the inner wall of the limiting block two (301) is slidably connected to the outer wall of the dustproof plate (102), and a number of slide rails (302) are fixedly connected to the top outer wall of the limiting block two (301), and a slider (303) is slidably connected to the inner wall of each of the slide rails (302).

3. A multi-layer ventilation filter for the aquaculture industry according to claim 2, characterized in that, A threaded rod (304) is rotatably connected to the inner wall of the slider (303) at the rear end. The outer wall of the threaded rod (304) is rotatably connected to the inner wall of the slide rail (302). A limit rod (305) is slidably connected to the inner wall of the slider (303) at the outer end. The outer wall of the limit rod (305) is fixedly connected to the inner wall of the slide rail (302). A cleaning roller (306) is fixedly connected to the outer wall of the slider (303). The outer wall of the cleaning roller (306) is slidably connected to the outer wall of the dustproof plate (102).

4. A multi-layer ventilation filter for the aquaculture industry according to claim 3, characterized in that, The mounting bracket (1) has a sliding groove (307) on the inner wall of the end away from the gear disk (202). A limiting plate (308) is fixedly connected to the inner wall of the sliding groove (307), and a sliding rod (309) is slidably connected to the inner wall of the limiting plate (308).

5. A multi-layer ventilation filter for the aquaculture industry according to claim 4, characterized in that, A spring (310) is fixedly connected to the outer wall of the end of the slide rod (309) away from the limiting plate (308). The outer wall of the spring (310) is slidably connected to the outer wall of the limiting plate (308). A positioning groove (311) is provided on the inner wall of the end of the mounting bracket (1) close to the spring (310).

6. A multi-layer ventilation filter for the aquaculture industry according to claim 5, characterized in that, The inner wall of the positioning groove (311) is slidably connected to a positioning rod (312), and the outer wall of the positioning rod (312) is slidably connected to the outer wall of the slide rod (309). The inner wall of the mounting bracket (1) near the positioning rod (312) is provided with several arc-shaped slide grooves (313), and the outer wall of the mounting bracket (1) near the arc-shaped slide grooves (313) is fixedly connected with several limiting shafts (318).

7. A multi-layer ventilation filter for the aquaculture industry according to claim 6, characterized in that, The outer wall of the limiting shaft (318) is rotatably connected to a limiting baffle (319), and the inner wall of the limiting baffle (319) is provided with a sliding groove three (314), and a telescopic rod (315) is fixedly connected to the inner wall of the sliding groove three (314).

8. A multi-layer ventilation filter for the aquaculture industry according to claim 7, characterized in that, The outer wall of the telescopic rod (315) is fixedly connected to a limiting rod two (317). A spring two (316) is fixedly connected to the outer wall of the limiting rod two (317) near the telescopic rod (315). The outer wall of the spring two (316) is fixedly connected to the inner wall of the sliding groove three (314). The outer wall of the limiting rod two (317) is slidably connected to the inner wall of the arc-shaped sliding groove (313).

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