Combined organic waste gas treatment device

Abstract

The utility model provides a combined organic waste gas treatment device which comprises a first vertical baffle, a first partition plate, first filter screen plates and first adsorption screen plates, the first adsorption screen plates are installed on the right end face of the first vertical baffle, and the first filter screen plates are symmetrically installed on the upper side and the lower side of the inner wall of the first partition plate. According to the organic waste gas treatment device, organic waste gas sucked into the first treatment box is firstly filtered by the first filter screen plate, then the multiple first ozone lamps sterilize and disinfect the passing organic waste gas, and then the organic waste gas is adsorbed and purified by the first adsorption screen plate; then, the second adsorption screen plate adsorbs and purifies the organic waste gas for the second time, the first ozone lamps sterilize and disinfect the organic waste gas again, and the sterilized and disinfected organic waste gas is filtered for the second time by the second filter screen plate, so that the organic waste gas is effectively treated.

Description

Technical Field

[0001] The utility model relates to the technical field of organic waste gas treatment, in particular to a combined organic waste gas treatment device. Background Art

[0002] Organic waste gas refers to various toxic and harmful gases generated in industrial production. Organic gas contains various chemical substances, which are mixed in the organic gas in liquid or gaseous state. Organic gas may also contain dust, floating soil and large particles of minerals. The discharge of organic waste gas without treatment will pollute the atmospheric environment, leading to a series of consequences such as climate warming, marine and forest pollution, etc.

[0003] Publication number "CN209333469U" provides an organic waste gas treatment device. When the equipment needs to be maintained or repaired, the operator lifts the button block and removes the hook ring from the hook to separate the first purification chamber and the second purification chamber, which is convenient for maintenance or repair of the original parts inside the equipment. After the maintenance is completed, the second purification chamber is inserted back into the locking mouth, the hook ring is put on the hook and the button block is pressed to install and fix the equipment.

[0004] However, the above technical solutions and the prior art have the following defects:

[0005] Although the organic waste gas treatment device can separate the first purification chamber and the second purification chamber to maintain or repair the components inside the equipment, this structure requires manual pushing and pulling of the second purification chamber when opening and closing the first purification chamber and the second purification chamber. Although pulleys are installed, the second purification chamber of a certain volume will also consume more physical strength of the staff during the actual movement, and its practicality is poor. Utility Model Content

[0006] The purpose of the utility model is to provide a combined organic waste gas treatment device to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A combined organic waste gas treatment device comprises a support, a bottom base, an outlet hose, a second treatment box, a first treatment box and an air inlet hose, wherein the support is symmetrically fixedly connected to the left and right sides of the lower end surface of the bottom base, a first treatment box is installed above the bottom base, a second treatment box is attached to the right end surface of the first treatment box, an air inlet hose is connected to the left end of the first treatment box, and an air outlet hose is connected to the right end of the second treatment box, the first treatment box and the second treatment box are both provided with adsorption treatment components for adsorbing and filtering organic waste gas, and an opening and closing component for moving the first treatment box and the second treatment box left and right is provided inside the bottom base, so that the staff can disassemble, maintain or replace the adsorption treatment components inside the first treatment box and the second treatment box later.

[0009] Preferably, the adsorption treatment component includes a first vertical baffle, a first partition, a first ozone lamp, a first filter mesh plate and a first adsorption mesh plate. The first vertical baffle is symmetrically fixedly connected to the upper and lower sides of the inner wall of the first treatment box, and the first adsorption mesh plate is installed on the right end face of the first vertical baffle. The first partition is fixedly connected to the left side of the inside of the first treatment box, and the first filter mesh plates are symmetrically installed on the upper and lower sides of the inner wall of the first partition, and multiple first ozone lamps are installed on the right end face of the first partition.

[0010] Preferably, a second partition is fixedly connected to the right side of the inside of the second treatment box, a plurality of second ozone lamps are installed on the left end face of the second partition, second filter mesh plates are symmetrically installed on the upper and lower sides of the inner wall of the second partition, second vertical baffles are symmetrically fixedly connected to the upper and lower sides of the inner wall of the second treatment box, and a second adsorption mesh plate is installed on the left end face of the second vertical baffle.

[0011] Preferably, the opening and closing assembly includes a double-threaded screw, a limit groove, a first bottom support seat, a low-speed motor, a rotating worm wheel and a rotating worm. A double-threaded screw is installed inside the bottom base, a rotating worm wheel is arranged on the right side of the annular side of the double-threaded screw, a rotating worm wheel is meshed with a rotating worm wheel on the rear side of the annular side of the rotating worm wheel, a low-speed motor is installed at the lower end of the rotating worm wheel, a first bottom support seat is arranged at the bottom of the first treatment box, and limit grooves are symmetrically provided on the left and right sides of the upper end surface of the bottom base.

[0012] Preferably, a second bottom support seat is provided at the bottom of the second treatment box, and the limiting groove matches the first bottom support seat and the second bottom support seat respectively, and the left external thread of the annular side of the double-threaded screw has an opposite rotation direction to the right external thread of the annular side.

[0013] Preferably, sealing grooves are provided on the right end face of the first treatment box and the left end of the second treatment box, a sealing strip is installed between the first treatment box and the second treatment box, and the sealing strip matches the sealing groove, and an inspection plate is installed on the right end face of the bottom base.

[0014] Preferably, the first adsorption mesh plate is made of an activated carbon filter, the first filter mesh plate is made of a plate-type primary air filter, and the first adsorption mesh plate and the first filter mesh plate are both detachable structures.

[0015] Preferably, the second adsorption mesh plate is made of an activated carbon filter, the second filter mesh plate is made of a plate-type medium-efficiency air filter, and the second adsorption mesh plate and the second filter mesh plate are both detachable structures.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. In the process of treating organic waste gas, the organic waste gas sucked into the first treatment box will be filtered by the first filter screen first, and then the first ozone lamps will sterilize and disinfect the organic waste gas, and then the organic waste gas will be adsorbed and purified by the first adsorption screen, and then the second adsorption screen will perform secondary adsorption and purification on the organic waste gas, and then the first ozone lamps will sterilize and disinfect the organic waste gas again, and the sterilized organic waste gas will be filtered for the second time by the second filter screen, so as to effectively treat the organic waste gas;

[0018] 2. The utility model controls the low-speed motor to rotate forward, so that the low-speed motor can drive the double-threaded screw to rotate forward together through the rotating worm and the rotating worm wheel, so that the double-threaded screw that rotates forward drives the first treatment box and the second treatment box to move outward and open synchronously through the first bottom support seat and the second bottom support seat, so that the staff can disassemble, clean or replace the adsorption treatment components inside the first treatment box and the second treatment box later; and this structure does not consume much physical strength of the staff in the process of opening and closing the first treatment box and the second treatment box, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 It is a front cross-sectional view of the opening and closing component and the adsorption processing component in the utility model;

[0021] Figure 3 It is a structural diagram of the opening and closing component in the utility model;

[0022] Figure 4 It is a front cross-sectional view of the first treatment box and the second treatment box in the utility model in an opened and separated state;

[0023] Figure 5 It is a partial structural diagram of the opening and closing component in the utility model.

[0024] In the figure: 1. support; 2. bottom base; 21. inspection plate; 3. opening and closing assembly; 31. double-threaded screw; 32. limiting groove; 33. first bottom support seat; 34. second bottom support seat; 35. low-speed motor; 36. rotating worm gear; 37. rotating worm; 4. outlet hose; 5. second treatment box; 51. sealing strip; 6. adsorption treatment assembly; 61. first vertical baffle; 62. first partition; 63. first ozone lamp; 64. first filter screen; 65. first adsorption screen; 66. second adsorption screen; 67. second vertical baffle; 68. second filter screen; 69. second ozone lamp; 611. second partition; 7. first treatment box; 71. sealing groove; 8. intake hose. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5 , the utility model provides a technical solution:

[0027] Embodiment 1:

[0028] A combined organic waste gas treatment device includes a support 1, a bottom base 2, an air outlet hose 4, a second treatment box 5, a first treatment box 7 and an air inlet hose 8. The support 1 is symmetrically fixedly connected to the left and right sides of the lower end surface of the bottom base 2. The support 1 is installed and fixed at a specified position on the ground by external expansion bolts. The support 1 will support and fix the bottom base 2. A first treatment box 7 is installed above the bottom base 2. The second treatment box 5 is attached to the right end surface of the first treatment box 7. The first treatment box 7 and the second treatment box 5 facilitate the adsorption and treatment component 6 to treat and adsorb the organic waste gas. An inspection plate 21 is installed on the right end surface of the bottom base 2. The inspection plate 21 is a detachable structure. The detachable inspection plate 21 not only blocks and limits the double-threaded screw 31, but also facilitates the later staff to maintain the rotating worm wheel 36 and the rotating worm 37.

[0029] An air intake hose 8 is connected to the left end of the first treatment box 7, and the inlet of the air intake hose 8 is connected to the external organic waste gas outlet. The air intake hose 8 is convenient for guiding the organic waste gas to the inside of the first treatment box 7. An air outlet hose 4 is connected to the right end of the second treatment box 5, and the outlet of the air outlet hose 4 is connected to the inlet of the external exhaust fan. The air outlet hose 4 is convenient for the external exhaust fan to suck the organic waste gas after the suction treatment inside the second treatment box 5. A sealing groove 71 is provided on the right end face of the first treatment box 7 and the left end of the second treatment box 5. A sealing strip 51 is installed between the first treatment box 7 and the second treatment box 5, and the sealing strip 51 is matched with the sealing groove 71. The matching sealing strip 51 and the sealing groove 71 make the combined first treatment box 7 and the second treatment box 5 better sealed, thereby preventing the organic waste gas inside the first treatment box 7 and the second treatment box 5 from escaping to the outside.

[0030] The first treatment box 7 and the second treatment box 5 are both provided with an adsorption treatment component 6 for adsorbing and filtering the organic waste gas, and the bottom base 2 is provided with an opening and closing component 3 for moving the first treatment box 7 and the second treatment box 5 left and right, so that the staff can disassemble, maintain or replace the adsorption treatment component 6 inside the first treatment box 7 and the second treatment box 5 later.

[0031] The first treatment box 7 and the second treatment box 5 are each provided with a first threading hole on their lower end surfaces, which is filled with explosion-proof putty after the wire is inserted through it, and the first threading hole is provided with a second threading hole on the lower side inside the first partition 62 and the second partition 611, which facilitates the external wire to be inserted into the first treatment box 7 and the second treatment box 5 to be electrically connected to the first ozone lamp 63 and the second ozone lamp 69, and the explosion-proof putty will block the first threading hole after the wire is inserted, to prevent the organic waste gas inside the first treatment box 7 and the second treatment box 5 from escaping to the outside through the first threading hole.

[0032] The adsorption treatment component 6 includes a first vertical baffle 61, a first partition 62, a first ozone lamp 63, a first filter screen 64 and a first adsorption screen 65. The first vertical baffle 61 is symmetrically fixedly connected to the upper and lower sides of the inner wall of the first treatment box 7. The first vertical baffle 61 not only supports the first adsorption screen 65, but also blocks the organic waste gas entering the first treatment box 7 so that the organic waste gas passes through the first filter screen 64. The first adsorption screen 65 is installed on the right end face of the first vertical baffle 61. The material of the first adsorption screen 65 is an activated carbon filter. The first adsorption screen 65 made of an activated carbon filter can adsorb and purify organic waste gases such as toluene, xylene, benzene, phenols, esters, alcohols, aldehydes, etc.

[0033] A first partition plate 62 is fixedly connected to the left side of the first treatment box 7. The first partition plate 62 not only supports the first filter plate 64 and the first ozone lamp 63 respectively, but also blocks the organic waste gas entering the first treatment box 7 so that the organic waste gas can move up and down. The first filter plates 64 are symmetrically installed on the upper and lower sides of the inner wall of the first partition plate 62. The material of the first filter plate 64 is a plate-type primary air filter. The first filter plate 64 made of a plate-type primary air filter will block and filter particulate impurities ≥5.0μm in the organic waste gas. The first adsorption screen plate 65 and the first filter screen plate 64 are both detachable structures. The detachable first adsorption screen plate 65 and the first filter screen plate 64 are convenient for the later staff to clean or replace them. A plurality of first ozone lamps 63 are installed on the right end face of the first partition plate 62. The plurality of first ozone lamps 63 have the ability to kill bacteria and disinfect when powered on, so as to disinfect and sterilize the organic waste gas filtered by the first filter screen plate 64.

[0034] A second partition 611 is fixedly connected to the right side of the second treatment box 5. The second partition 611 not only supports the second filter screen 68 and the second ozone lamp 69 respectively, but also blocks the organic waste gas entering the second treatment box 5, so that the organic waste gas can only move up and down and be filtered by the second filter screen 68. A plurality of second ozone lamps 69 are installed on the left end face of the second partition 611. The plurality of second ozone lamps 69 have the ability to kill bacteria and disinfect when powered on, so as to disinfect and sterilize the organic waste gas after being filtered by the second adsorption screen 66.

[0035] The second filter screen 68 is symmetrically installed on the upper and lower sides of the inner wall of the second partition 611. The second filter screen 68 is made of a plate-type medium-efficiency air filter. The second filter screen 68 made of a plate-type medium-efficiency air filter will block and filter the particle impurities ≥1.0μm in the organic waste gas. The second vertical baffle 67 is symmetrically fixedly connected to the upper and lower sides of the inner wall of the second treatment box 5. The second vertical baffle 67 not only supports the second adsorption screen 66, but also blocks the organic waste gas entering the second treatment box 5, so that the organic waste gas The gas can only pass through the second adsorption mesh plate 66. The second adsorption mesh plate 66 is installed on the left end face of the second vertical baffle 67. The second adsorption mesh plate 66 is made of activated carbon filter. The second adsorption mesh plate 66 made of activated carbon filter can adsorb and purify organic waste gases such as toluene, xylene, benzene, phenols, esters, alcohols, aldehydes, etc. The second adsorption mesh plate 66 and the second filter mesh plate 68 are both detachable structures. The detachable second adsorption mesh plate 66 and the second filter mesh plate 68 are convenient for the later staff to clean or replace them.

[0036] Embodiment 2:

[0037] On the basis of Example 1, in this embodiment, by controlling the low-speed motor 35 to rotate forward, the low-speed motor 35 can drive the double-threaded screw 31 to rotate forward through the rotating worm 37 and the rotating worm wheel 36, so that the forward-rotating double-threaded screw 31 drives the first treatment box 7 and the second treatment box 5 to move outward and open synchronously through the first bottom support seat 33 and the second bottom support seat 34, so that the staff can disassemble, clean or replace the adsorption treatment components 6 inside the first treatment box 7 and the second treatment box 5 later.

[0038] The opening and closing assembly 3 includes a double-threaded screw 31, a limit groove 32, a first bottom support seat 33, a low-speed motor 35, a rotating worm wheel 36 and a rotating worm 37. The double-threaded screw 31 is installed inside the bottom base 2. The external thread on the left side of the annular side of the double-threaded screw 31 rotates in opposite directions to the external thread on the right side of the annular side. When the double-threaded screw 31 rotates, the external thread on the left side of the annular side and the external thread on the right side of the annular side rotate in opposite directions, and the first bottom support seat 33 and the second bottom support seat 34 will move synchronously in opposite directions. A rotating worm wheel 36 is provided on the right side of the annular side of the double-threaded screw 31. The rotating worm wheel 36 is connected to the double-threaded screw 31 by welding. The rotating worm wheel 36 will drive the double-threaded screw 31 to rotate. The rotating worm 37 is meshed with the rear side of the annular side of the rotating worm wheel 36, and the rotating worm 37 will drive the rotating worm wheel 36 to rotate.

[0039] A low-speed motor 35 is installed at the lower end of the rotating worm gear 37, and the low-speed motor 35 will drive the rotating worm wheel 36 to rotate. A control panel is installed on the left side of the front end surface of the bottom base 2, and the control panel is connected to the low-speed motor 35 through a wire. The control panel facilitates the staff to control the forward and reverse rotation of the low-speed motor 35. Since the internal detailed structure and working principle of the control panel belong to the relatively mature technology in the prior art, they will not be elaborated here. A first bottom support seat 33 is provided at the bottom of the first treatment box 7, and the first bottom support seat 33 is connected to the first treatment box 7 by welding. The first bottom support seat 33 will not only support the first treatment box 7, but also drive the first treatment box 7 to move left and right.

[0040] Limiting grooves 32 are symmetrically provided on the left and right sides of the upper end surface of the bottom base 2, and the limiting grooves 32 are matched with the first bottom support seat 33 and the second bottom support seat 34 respectively. The limiting grooves 32 will limit and guide the first bottom support seat 33 and the second bottom support seat 34. A second bottom support seat 34 is arranged at the bottom of the second treatment box 5, and the second bottom support seat 34 is connected to the second treatment box 5 by welding. The second bottom support seat 34 will not only support the second treatment box 5, but also drive the second treatment box 5 to move left and right. Internal threaded through holes are provided on the lower sides of the first bottom support seat 33 and the second bottom support seat 34, and the internal threaded through holes are meshed with the double-threaded screw rod 31. The internal threaded through holes facilitate the double-threaded screw rod 31 to drive the first bottom support seat 33 and the second bottom support seat 34 to move left and right.

[0041] Working principle: When it is necessary to treat the organic waste gas, the staff first starts the external exhaust fan and turns on the first ozone lamp 63 and the second ozone lamp 69, so that the external exhaust fan works to suck the second treatment box 5 through the air outlet hose 4, so that negative pressure is generated inside the first treatment box 7 and the second treatment box 5, and the discharged organic waste gas is sucked through the air inlet hose 8, and the organic waste gas sucked into the first treatment box 7 will first be filtered by the first filter screen 64, and the particle impurities ≥5.0μm in the organic waste gas will be blocked and filtered, and then The multiple first ozone lamps 63 powered on will sterilize and disinfect the organic waste gas, and then the organic waste gas will be adsorbed and purified by the first adsorption mesh plate 65, and then the second adsorption mesh plate 66 will perform secondary adsorption and purification on the organic waste gas, and then the multiple first ozone lamps 63 powered on will sterilize and disinfect the organic waste gas again, and the sterilized organic waste gas will be filtered for the second time by the second filter mesh plate 68, blocking and filtering the impurities of particles ≥1.0μm in the organic waste gas, so as to treat the organic waste gas (reference Figure 2 ), and finally the organic waste gas will be sucked into the external exhaust fan through the air outlet hose 4 and discharged.

[0042] During later use, when the adsorption treatment component 6 needs to be maintained, the staff first turns off the external exhaust fan, and then controls the low-speed motor 35 to rotate forward through the control panel, so that the low-speed motor 35 drives the rotating worm 37 to rotate, and the rotating worm 37 drives the rotating worm wheel 36 to rotate forward, and then the rotating worm wheel 36 drives the double-threaded screw 31 to rotate forward together. At this time, the forward-rotating double-threaded screw 31 will drive the first bottom support seat 33 and the second bottom support seat 34 to move outward synchronously, so that the first bottom support seat 33 and the second bottom support seat 34 drive the first treatment box 7 and the second treatment box 5 to move outward synchronously to open (reference Figure 4 ); when the first treatment box 7 and the second treatment box 5 move synchronously to the outside and into place, the low-speed motor 35 can be stopped. At this time, the staff can dismantle, clean or replace the first adsorption mesh plate 65, the second adsorption mesh plate 66, the first filter mesh plate 64 and the second filter mesh plate 68 inside the first treatment box 7 and the second treatment box 5 in turn. After the cleaning or replacement is completed, the staff controls the low-speed motor 35 to reverse, so that the first bottom support seat 33 and the second bottom support seat 34 can drive the first treatment box 7 and the second treatment box 5 to move synchronously inward and merge.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined organic waste gas treatment device, comprising a support (1), a bottom base (2), an air outlet hose (4), a second treatment box (5), a first treatment box (7) and an air inlet hose (8), characterized in that: The lower end surface of the bottom base (2) is symmetrically fixedly connected with a support (1) on both sides, a first treatment box (7) is installed above the bottom base (2), a second treatment box (5) is attached to the right end surface of the first treatment box (7), an air inlet hose (8) is connected to the left end of the first treatment box (7), and an air outlet hose (4) is connected to the right end of the second treatment box (5); The first treatment box (7) and the second treatment box (5) are both provided with an adsorption treatment component (6) for adsorbing and filtering the organic waste gas, and the bottom base (2) is provided with an opening and closing component (3) for moving the first treatment box (7) and the second treatment box (5) left and right, so that the staff can disassemble, maintain or replace the adsorption treatment component (6) inside the first treatment box (7) and the second treatment box (5) later.

2. A combined organic waste gas treatment device according to claim 1, characterized in that: The adsorption treatment component (6) comprises a first vertical baffle (61), a first partition (62), a first ozone lamp (63), a first filter screen (64) and a first adsorption screen (65); the first vertical baffle (61) is symmetrically fixedly connected to the upper and lower sides of the inner wall of the first treatment box (7); the first adsorption screen (65) is installed on the right end face of the first vertical baffle (61); the first partition (62) is fixedly connected to the left side of the inside of the first treatment box (7); the first filter screen (64) is symmetrically installed on the upper and lower sides of the inner wall of the first partition (62); and a plurality of first ozone lamps (63) are installed on the right end face of the first partition (62).

3. The combined organic waste gas treatment device according to claim 1 is characterized in that: A second partition (611) is fixedly connected to the right side of the inside of the second treatment box (5), and a plurality of second ozone lamps (69) are installed on the left end face of the second partition (611). Second filter screens (68) are symmetrically installed on the upper and lower sides of the inner wall of the second partition (611). Second vertical baffles (67) are symmetrically fixedly connected to the upper and lower sides of the inner wall of the second treatment box (5), and a second adsorption screen (66) is installed on the left end face of the second vertical baffle (67).

4. The combined organic waste gas treatment device according to claim 1 is characterized in that: The opening and closing assembly (3) comprises a double-threaded screw (31), a limiting groove (32), a first bottom support seat (33), a low-speed motor (35), a rotating worm wheel (36) and a rotating worm (37); the double-threaded screw (31) is installed inside the bottom base (2); a rotating worm wheel (36) is arranged on the right side of the annular side of the double-threaded screw (31); a rotating worm wheel (37) is meshed with the rear side of the annular side of the rotating worm wheel (36); a low-speed motor (35) is installed at the lower end of the rotating worm (37); a first bottom support seat (33) is arranged at the bottom of the first treatment box (7); and limiting grooves (32) are symmetrically provided on the left and right sides of the upper end surface of the bottom base (2).

5. A combined organic waste gas treatment device according to claim 4, characterized in that: A second bottom support seat (34) is provided at the bottom of the second treatment box (5), and the limiting groove (32) matches the first bottom support seat (33) and the second bottom support seat (34) respectively. The external thread on the left side of the annular side of the double-threaded screw (31) rotates in opposite directions to the external thread on the right side of the annular side.

6. The combined organic waste gas treatment device according to claim 1, characterized in that: A sealing groove (71) is provided on the right end surface of the first treatment box (7) and the left end of the second treatment box (5), a sealing strip (51) is installed between the first treatment box (7) and the second treatment box (5), and the sealing strip (51) matches the sealing groove (71), and an inspection plate (21) is installed on the right end surface of the bottom base (2).

7. The combined organic waste gas treatment device according to claim 2 is characterized in that: The first adsorption mesh plate (65) is made of an activated carbon filter, the first filter mesh plate (64) is made of a plate-type primary air filter, and both the first adsorption mesh plate (65) and the first filter mesh plate (64) are detachable structures.

8. The combined organic waste gas treatment device according to claim 3 is characterized in that: The material of the second adsorption mesh plate (66) is an activated carbon filter, and the material of the second filter mesh plate (68) is a plate-type medium-efficiency air filter. The second adsorption mesh plate (66) and the second filter mesh plate (68) are both detachable structures.

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