Textile fabric cleaning equipment

Abstract

The textile fabric cleaning equipment comprises a shell and a cleaning mechanism, a support is arranged at the bottom of the shell, and a feeding port and a discharging port are formed in the two sides of the shell correspondingly; the cleaning mechanism comprises a first sealing assembly, two beating assemblies, a second sealing assembly, a guiding assembly and a negative pressure collecting device, the first sealing assembly is connected with the bottom wall of the shell, the second sealing assembly is connected with the top wall of the shell, and a quadrilateral cavity is defined by the first sealing assembly and the second sealing assembly. According to the textile fabric cleaning equipment, the beating assembly is used for impacting the textile fabric, so that impurities embedded into the textile fabric are smoothly separated, the positions of the textile fabric are continuously changed in the quadrilateral cavity, the impurities rapidly surge into the negative pressure collecting device, part of cleaned impurities are prevented from being attached to the textile fabric again, and the service life of the textile fabric is prolonged. Therefore, the cleaning quality of the textile fabric is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of textile fabric processing, and in particular to a textile fabric cleaning device. Background Art

[0002] In the production process of textile fabrics, the following aspects are likely to cause impurities such as lint, thread ends and dust on the textile fabrics, for example: due to defects in the fiber itself; the winding friction during spinning and weaving will cause fiber breakage; the mechanical equipment on the beat production line will cause wear to the fiber during operation; cotton or other fiber materials are prone to absorb dust during storage and transportation, etc.

[0003] Such impurities seriously affect the visual appearance of textile products and reduce the quality of the products. The textile standards in some regions have strict regulations on the amount of lint and thread ends, and unqualified products are usually not allowed to be sold.

[0004] In the related art, common cleaning methods are generally carried out by mechanical removal, specifically, using special brushes, rollers or scrapers to physically remove impurities from the surface of textile fabrics. However, this method is not effective in cleaning impurities embedded in textile fabrics. In addition, some impurities after cleaning are easily separated from the tool and attached to the textile fabric again, affecting the cleaning quality of the textile fabric. Summary of the invention

[0005] The present application aims to solve one of the technical problems in the above-mentioned technology at least to some extent.

[0006] To this end, one purpose of the present application is to propose a textile fabric cleaning device, which utilizes a striking component to impact the textile fabric so that impurities embedded in the textile fabric can be smoothly detached. Combined with the continuous change of position of the textile fabric in the quadrilateral cavity, the impurities can quickly flow into the negative pressure collection device, thereby preventing some of the impurities after cleaning from adhering to the textile fabric again, thereby ensuring the cleaning quality of the textile fabric.

[0007] To achieve the above-mentioned purpose, the first aspect of the present application proposes a textile fabric cleaning device, comprising: a shell and a cleaning mechanism, wherein a bracket is provided at the bottom of the shell, and a feed port and a discharge port are respectively opened on both sides of the shell; the cleaning mechanism comprises a first closing component, two groups of striking components, a second closing component, a guide component and a negative pressure collection device, wherein the first closing component is connected to the bottom wall of the shell, the second closing component is connected to the top wall of the shell, and the first closing component and the second closing component form a quadrilateral cavity; the two groups of the striking components are symmetrically arranged on the inner wall and bottom wall of the shell. The striking assembly passes through the first closing assembly, and the striking assembly extends to the interior of the quadrilateral cavity; the guide assembly includes a guide roller group, a driving component and two moving components, wherein the two moving components are symmetrically arranged on the shell, the guide roller group is rotatably connected to the two moving components, and the guide roller group is located in the quadrilateral cavity; the driving component is installed on the outer wall of the shell, and the driving component is connected to the two moving components; the negative pressure collecting device is installed on the bracket, and the first closing assembly and the second closing assembly are respectively connected to the negative pressure collecting device.

[0008] In addition, the textile fabric cleaning device proposed in the above embodiment of the present application may also have the following additional technical features:

[0009] In one embodiment of the present application, the first closing component includes a first V-shaped plate, two first guide rollers and a connecting piece, wherein the bottom of the first V-shaped plate passes through the bottom wall of the shell and is connected to the shell; the two first guide rollers are rotatably connected to the first V-shaped plate respectively; a through groove is provided at the bottom of the first V-shaped plate, one end of the connecting piece is connected to the through groove, and the other end of the connecting piece is connected to the negative pressure collection device.

[0010] In one embodiment of the present application, the striking assembly includes an air pump, a first tube body, an air outlet groove and a plurality of cloth strips, wherein the air pump is arranged on the inner bottom wall of the shell, and one end of the first tube body is connected to the air outlet end of the air pump; the air outlet groove is arranged on the inner wall of the first V-shaped plate, and the other end of the first tube body is connected to the air outlet groove; and the plurality of cloth strips are respectively arranged inside the air outlet groove.

[0011] In one embodiment of the present application, the second closing component includes a second V-shaped plate, a second tube body and two second guide rollers, wherein the top of the second V-shaped plate is connected to the inner top wall of the shell, and the second V-shaped plate is symmetrically arranged with the first V-shaped plate; the two second guide rollers are respectively rotatably connected to the second V-shaped plate; a cavity is provided inside the second V-shaped plate, and a plurality of through holes are opened on the inner wall of the second V-shaped plate, and the through holes are connected to the cavity; one end of the second tube body is connected to the cavity, and the other end of the second tube body passes through the top wall of the shell, and the other end of the second tube body is connected to the negative pressure collection device.

[0012] In one embodiment of the present application, the moving component includes a slot body, a bidirectional lead screw and a connecting block, wherein the slot body is connected to the housing; the bidirectional lead screw is rotatably connected to the slot body; the connecting block is slidably connected to the bidirectional lead screw, and the connecting block is connected to one end of the guide roller group.

[0013] In one embodiment of the present application, the driving component includes a driving motor, a first transmission member and a second transmission member, wherein the driving motor is mounted on the outer wall of the shell; one end of the bidirectional screw passes through the groove body, and the second transmission member is connected to the two bidirectional screws; one end of the first transmission member is connected to the output shaft of the driving motor, and the other end of the first transmission member is connected to one end of the second transmission member.

[0014] In one embodiment of the present application, two door bodies are symmetrically arranged on the outer wall of the shell.

[0015] Compared with the prior art, the present application has the following beneficial effects: the textile fabric cleaning device of the embodiment of the present application continuously hammers the textile fabric through the striking component, and at the same time combines the gas to impact the textile fabric, thereby ensuring that the impurities on the surface of the textile fabric are cleaned, and the impurities embedded in the textile fabric can be smoothly detached. In addition, the first closing component and the second closing component constitute a quadrilateral cavity, which reduces the range in which impurities can overflow. The guide component can continuously change the position of the textile fabric in the quadrilateral cavity. On the one hand, it can make the textile fabric close to the impurity collection position. On the other hand, it can push the impurities in the quadrilateral cavity to quickly flow into the negative pressure collection device, thereby avoiding some impurities after cleaning from adhering to the textile fabric again, thereby ensuring the cleaning quality of the textile fabric.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 A three-dimensional structure diagram of a textile fabric cleaning device according to an embodiment of the present application Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the internal structure of a textile fabric cleaning device according to an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the connection structure of the first closing component and the striking component of the textile fabric cleaning device according to one embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the structure of the second closed component of a textile fabric cleaning device according to an embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the structure of a guide assembly of a textile fabric cleaning device according to an embodiment of the present application;

[0023] Figure 6 A three-dimensional structure diagram of a textile fabric cleaning device according to an embodiment of the present application Figure 2 .

[0024] 1. Shell; 11. Feed port; 12. Discharge port; 2. Cleaning mechanism; 21. First closing component; 211. First V-shaped plate; 212. First guide roller; 213. Through slot; 214. Connecting piece; 22. Beating component; 221. Air pump; 222. First tube body; 223. Air outlet slot; 224. Cloth strip; 23. Second closing component; 231. Second V-shaped plate; 232. Through hole; 233. Second guide roller; 234. Second tube body; 24. Guide component; 241. Guide roller group; 242. Moving component; 2421. Slot body; 2422. Bidirectional lead screw; 2423. Connecting block; 243. Driving component; 2431. Driving motor; 2432. First transmission component; 2433. Second transmission component; 25. Negative pressure collecting device; 31. Door body. DETAILED DESCRIPTION

[0025] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0026] The textile fabric cleaning device according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0027] like Figure 1-Figure 6As shown, the textile fabric cleaning device of the embodiment of the present application may include: a shell 1 and a cleaning mechanism 2.

[0028] A bracket is provided at the bottom of the shell 1 , and a feed inlet 11 and a discharge outlet 12 are respectively provided on two sides of the shell 1 .

[0029] It should be noted that a winding device (not shown in the figure) and an unwinding device (not shown in the figure) are respectively provided on both sides of the shell 1 described in this embodiment. The unwinding device is arranged close to the feed port 11, and the winding device is arranged close to the discharge port 12. The specific structures of the winding device and the unwinding device have been disclosed in the prior art, so they will not be described in detail here.

[0030] It can be understood that, under the action of the reeling device and the unreeling device, the textile fabric can be kept straight during the movement, thereby facilitating the separation of impurities attached to the textile fabric.

[0031] It should be noted that the bracket can reduce the contact area between the housing 1 and the ground, thereby increasing the pressure between the two and increasing the stability of the device during operation.

[0032] The cleaning mechanism 2 includes a first closing component 21 , two groups of striking components 22 , a second closing component 23 , a guiding component 24 and a negative pressure collecting device 25 .

[0033] The first closed component 21 is connected to the bottom wall of the shell 1 , and the second closed component 23 is connected to the top wall of the shell 1 . The first closed component 21 and the second closed component 23 form a quadrilateral cavity.

[0034] It can be understood that the quadrilateral cavity enclosed by the first closing component 21 and the second closing component 23 can reduce the movement range of impurities after they are separated from the textile fabric, thereby preventing the impurities from attaching to the textile fabric again after they are separated.

[0035] Two groups of striking components 22 are symmetrically arranged on the inner wall and bottom wall of the shell 1. The striking components 22 penetrate the first closing component 21 and extend to the inside of the quadrilateral cavity. The striking components 22 are used to impact the textile fabric to force impurities on the textile fabric to fall off.

[0036] The guide assembly 24 includes a guide roller set 241, a driving component 243 and two moving components 242. The guide assembly 24 is used to drive the textile fabric to move back and forth in the quadrilateral cavity.

[0037] Among them, the two moving parts 242 are symmetrically arranged on the shell 1, the guide roller group 241 is rotatably connected to the two moving parts 242, the guide roller group 241 is located in the quadrilateral cavity, the driving part 243 is installed on the outer wall of the shell 1, and the driving part 243 is connected to the two moving parts 242.

[0038] The negative pressure collecting device 25 is installed on the bracket, and the first closing component 21 and the second closing component 23 are respectively connected to the negative pressure collecting device 25. The negative pressure collecting device 25 is used to collect impurities detached from the textile fabric.

[0039] It should be noted that the negative pressure collection device 25 described in this embodiment may include: an air pump, a filter component, etc., and its specific connection structure has been disclosed in the prior art, so it will not be described in detail here.

[0040] In one embodiment of the present application, Figure 2 and Figure 3 As shown, the striking assembly 22 includes an air pump 221 , a first tube 222 , an air outlet groove 223 and a plurality of cloth strips 224 .

[0041] Among them, the air pump 221 is arranged on the inner bottom wall of the shell 1, one end of the first tube body 222 is connected to the air outlet end of the air pump 221, the air outlet groove 223 is arranged on the inner wall of the first V-shaped plate 211, the other end of the first tube body 222 is connected to the air outlet groove 223, and multiple cloth strips 224 are respectively arranged inside the air outlet groove 223.

[0042] Specifically, the device is arranged in front of the external textile fabric winding, and the finished textile fabric passes through the feed port 11, the quadrilateral cavity, the guide assembly 24 and the discharge port 12 in sequence.

[0043] Start the device, refer to Figure 2 The cleaning mechanism 2 starts to run, the guide component 24 is close to the top of the second closing component 23, the upper surface of the textile fabric is close to the second closing component 23, and the air pump 221 supplies air to the inside of the air outlet groove 223 through the first tube body 222. Under the action of the airflow, the cloth strip 224 shakes arbitrarily, and the end of the cloth strip 224 hammers the lower surface of the textile fabric in a disorderly manner, thereby shaking out the impurities embedded in the textile fabric. Since the upper surface of the textile fabric is close to the second closing component 23, the impurities shaken out and the impurities on the surface of the textile fabric can quickly enter the interior of the negative pressure collection device 25.

[0044] Next, the driving component 243 drives the moving component 242 to rotate, and the moving component 242 drives the guide roller group 241 to move downward, and the textile fabric in the quadrilateral cavity moves toward the direction of the first closing component 21, the contact area between the cloth strip 224 and the lower surface of the textile fabric increases, and the force between the cloth strip 224 and the textile fabric decreases, and the cloth strip 224 rubs against the lower surface of the textile fabric. At this time, the cloth strip 224 can be regarded as a cleaning brush that constantly rubs the lower surface of the textile fabric to remove impurities.

[0045] In addition, as the textile fabric approaches the air outlet groove 223, the force of the airflow increases, and the airflow can impact the impurities embedded inside the textile fabric again. At the same time, the textile fabric blocks a portion of the airflow, and the airflow forms a circulation between the air outlet groove 223 and the textile fabric. Under the joint action of the two striking components 22, two circulations are formed between the textile fabric and the first closing component 21, and the two circulations flow in opposite directions, both surging in the direction of the negative pressure collection device 25, thereby being able to quickly drive the impurities between the textile fabric and the first closing component 21 into the interior of the negative pressure collection device 25.

[0046] The textile fabric continuously moves in the shell 1. When the guide component 24 drives the textile fabric to move up and down inside the quadrilateral cavity, the textile fabric can push the impurities above and below it to quickly enter the interior of the negative pressure collection device 25, thereby preventing some impurities after cleaning from adhering to the textile fabric again, thereby ensuring the cleaning quality of the textile fabric. The cleaned fabric passes through the discharge port 12 and is collected by the external winding device.

[0047] It should be noted that, in the process of the guide assembly 24 driving the textile fabric to move up and down inside the quadrilateral cavity, the fiber gaps on the textile fabric continuously expand and contract, which is conducive to the separation of internal impurities during the expansion of the textile fabric.

[0048] In one embodiment of the present application, Figure 2 and Figure 3 As shown, the first closing assembly 21 includes a first V-shaped plate 211 , two first guide rollers 212 and a connecting piece 214 .

[0049] Among them, the bottom of the first V-shaped plate 211 passes through the bottom wall of the shell 1 and is connected to the shell 1, the two first guide rollers 212 are respectively rotatably connected to the first V-shaped plate 211, and a through groove 213 is opened at the bottom of the first V-shaped plate 211. One end of the connecting piece 214 is connected to the through groove 213, and the other end of the connecting piece 214 is connected to the negative pressure collection device 25.

[0050] In one embodiment of the present application, Figure 2 and Figure 4 As shown, the second closing component 23 includes a second V-shaped plate 231 , a second tube body 234 and two second guide rollers 233 .

[0051] Among them, the top of the second V-shaped plate 231 is connected to the inner top wall of the shell 1, the second V-shaped plate 231 and the first V-shaped plate 211 are arranged symmetrically, the two second guide rollers 233 are respectively rotatably connected to the second V-shaped plate 231, a cavity is provided inside the second V-shaped plate 231, and a plurality of through holes 232 are opened on the inner wall of the second V-shaped plate 231, the through holes 232 are connected to the cavity, one end of the second tube body 234 is connected to the cavity, the other end of the second tube body 234 passes through the top wall of the shell 1, and the other end of the second tube body 234 is connected to the negative pressure collection device 25.

[0052] Specifically, the textile fabric passes between the two first guide rollers 212 and the two second guide rollers 233. In the process of the guide assembly 24 driving the textile fabric to move upward, impurities on the surface of the textile fabric, impurities that have escaped from the inside of the textile fabric, and impurities suspended in the space between the textile fabric and the second V-shaped plate 231 pushed by the textile fabric enter the interior of the negative pressure collection device 25 through the through hole 232 and the second tube body 234.

[0053] When the guide assembly 24 drives the textile fabric to move downward, impurities can quickly enter the interior of the negative pressure collection device 25 through the through groove 213 and the connecting piece 214 .

[0054] In one embodiment of the present application, Figure 1 , Figure 5 and Figure 6 As shown, the moving component 242 includes a slot body 2421 , a bidirectional lead screw 2422 and a connecting block 2423 .

[0055] The groove body 2421 is connected to the housing 1 , the bidirectional lead screw 2422 is rotationally connected to the groove body 2421 , the connecting block 2423 is slidingly connected to the bidirectional lead screw 2422 , and the connecting block 2423 is connected to one end of the guide roller group 241 .

[0056] In one embodiment of the present application, Figure 1 , Figure 5 and Figure 6 As shown, the driving component 243 includes a driving motor 2431 , a first transmission member 2432 and a second transmission member 2433 .

[0057] Among them, the driving motor 2431 is installed on the outer wall of the shell 1, one end of the bidirectional screw 2422 passes through the groove body 2421, the second transmission member 2433 is connected to the two bidirectional screws 2422, one end of the first transmission member 2432 is connected to the output shaft of the driving motor 2431, and the other end of the first transmission member 2432 is connected to one end of the second transmission member 2433.

[0058] It should be noted that the first transmission member 2432 and the second transmission member 2433 described in this embodiment may include a transmission sprocket and a transmission chain, respectively, and their specific connection structures have been disclosed in the prior art, so they will not be described in detail here.

[0059] Specifically, in the process of the guide assembly 24 driving the textile fabric to move, the driving motor 2431 drives the first transmission member 2432 to operate, the first transmission member 2432 drives the second transmission member 2433 to operate, the second transmission member 2433 drives the two bidirectional screws 2422 to rotate, and the connecting block 2423 moves up and down inside the groove body 2421, thereby driving the guide roller group 241 to move up and down inside the quadrilateral cavity.

[0060] In one embodiment of the present application, Figure 1 As shown, two door bodies 31 are symmetrically arranged on the outer wall of the housing 1 .

[0061] It is understandable that relevant technicians can open the door body 31 before using the device, and pass one end of the textile fabric through the feed port 11, the quadrilateral cavity, the guide assembly 24 and the discharge port 12 in sequence, which is also convenient for later inspection and maintenance of the interior of the device.

[0062] In summary, the textile fabric cleaning device of the embodiment of the present application continuously hammers the textile fabric through the striking component and combines gas to impact the textile fabric, thereby ensuring that impurities on the surface of the textile fabric are cleaned and that impurities embedded in the interior of the textile fabric are smoothly detached. In addition, the first closing component and the second closing component constitute a quadrilateral cavity, which reduces the range in which impurities can overflow. The guide component can continuously change the position of the textile fabric in the quadrilateral cavity. On the one hand, it can make the textile fabric close to the impurity collection position. On the other hand, it can push the impurities in the quadrilateral cavity to quickly flow into the negative pressure collection device, thereby avoiding some impurities after cleaning from adhering to the textile fabric again, thereby ensuring the cleaning quality of the textile fabric.

[0063] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present application.

Claims

1. A textile fabric cleaning device, characterized in that: It includes: a shell and a cleaning mechanism, wherein: A bracket is provided at the bottom of the shell, and a feed inlet and a discharge outlet are respectively provided on two sides of the shell; The cleaning mechanism comprises a first sealing component, two sets of striking components, a second sealing component, a guide component and a negative pressure collecting device, wherein: The first enclosed component is connected to the bottom wall of the shell, the second enclosed component is connected to the top wall of the shell, and the first enclosed component and the second enclosed component form a quadrilateral cavity; Two groups of striking components are symmetrically arranged on the inner wall and bottom wall of the shell, the striking components penetrate the first closing component, and the striking components extend to the interior of the quadrilateral cavity; The guide assembly includes a guide roller set, a driving component and two moving components, wherein: The two moving parts are symmetrically arranged on the housing, the guide roller group is rotatably connected to the two moving parts, and the guide roller group is located in the quadrilateral cavity; The driving component is mounted on the outer wall of the housing, and the driving component is connected to the two moving components; The negative pressure collecting device is installed on the bracket, and the first sealing component and the second sealing component are respectively connected to the negative pressure collecting device.

2. The textile fabric cleaning device according to claim 1, characterized in that: The first closing assembly includes a first V-shaped plate, two first guide rollers and a connecting piece, wherein: The bottom of the first V-shaped plate passes through the bottom wall of the shell and is connected to the shell; The two first guide rollers are rotatably connected to the first V-shaped plate respectively; A through groove is formed at the bottom of the first V-shaped plate, one end of the connecting piece is connected to the through groove, and the other end of the connecting piece is connected to the negative pressure collecting device.

3. The textile fabric cleaning device according to claim 2, characterized in that: The striking assembly includes an air pump, a first tube body, an air outlet slot and a plurality of cloth strips, wherein: The air pump is arranged on the inner bottom wall of the housing, and one end of the first tube body is connected to the air outlet end of the air pump; The air outlet groove is arranged on the inner wall of the first V-shaped plate, and the other end of the first tube body is connected to the air outlet groove; The plurality of cloth strips are respectively arranged inside the air outlet grooves.

4. The textile fabric cleaning device according to claim 2, characterized in that: The second sealing assembly includes a second V-shaped plate, a second tube body and two second guide rollers, wherein: The top of the second V-shaped plate is connected to the inner top wall of the shell, and the second V-shaped plate is symmetrically arranged with the first V-shaped plate; The two second guide rollers are rotatably connected to the second V-shaped plate respectively; A cavity is provided inside the second V-shaped plate, and a plurality of through holes are opened on the inner wall of the second V-shaped plate, wherein the through holes are connected to the cavity; One end of the second tube body is communicated with the cavity, the other end of the second tube body passes through the top wall of the shell, and the other end of the second tube body is communicated with the negative pressure collecting device.

5. The textile fabric cleaning device according to claim 1, characterized in that: The moving part includes a slot body, a bidirectional lead screw and a connecting block, wherein: The tank is in communication with the housing; The bidirectional lead screw is rotatably connected to the slot body; The connecting block is slidably connected to the bidirectional lead screw, and the connecting block is connected to one end of the guide roller group.

6. The textile fabric cleaning device according to claim 5, characterized in that: The driving component includes a driving motor, a first transmission member and a second transmission member, wherein: The driving motor is mounted on the outer wall of the housing; One end of the bidirectional lead screw passes through the slot body, and the second transmission member is connected to the two bidirectional lead screws; One end of the first transmission member is connected to the output shaft of the driving motor, and the other end of the first transmission member is connected to one end of the second transmission member.

7. The textile fabric cleaning device according to claim 1, characterized in that: Two door bodies are symmetrically arranged on the outer wall of the shell.

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