Purification device

Abstract

The utility model discloses a purification device, and belongs to the technical field of purification. The purification device comprises: a cylinder, the end of which is provided with an access hole; the connecting piece is connected with the barrel body in a turnover manner; the side door is rotatably connected with the connecting piece; the gear is rotatably arranged on the cylinder body; the rack is arranged on the circumferential surface of the side door and can be meshed with the gear, and the length of the rack is smaller than the perimeter of the side door; the connecting piece can drive the side door to be switched between the first position and the second position, when the side door is located at the first position, the side door blocks the access opening, the gear is meshed with the rack, and when the side door is located at the second position, the side door opens the access opening, and the gear is separated from the rack. The purification device is convenient to overhaul.

Description

Technical Field

[0001] The present application belongs to the field of purification technology, and specifically relates to a purification device. Background Art

[0002] In the process of producing aluminum hydroxide by the Bayer process, it is necessary to control the temperature of the sodium aluminate solution for gradient decomposition, and add aluminum hydroxide seeds at the same time to increase the decomposition rate and accelerate the precipitation of aluminum hydroxide particles. During the decomposition process, various debris, such as rubber pads, cleaning tools, bolts, iron sheets and other debris, or large pieces of scarring may occur, affecting the normal operation of the conveying equipment. Therefore, it is necessary to purify the slurry circulating in the decomposition process, remove the debris and large pieces of scarring in the slurry, ensure the stable transportation of the decomposed slurry, and ensure the stability of the slurry volume at each temperature gradient. At the same time, the removal of large pieces of scarring can ensure the washing effect of the aluminum hydroxide product, thereby ensuring the purity of the aluminum hydroxide product.

[0003] In order to remove the impurities and large scabs in the slurry, a side door is provided on the cylinder body. By opening the side door, the staff enters the cylinder body to remove the impurities and large scabs in the slurry. However, in the prior art, the side door is a flange fastened to the cylinder body with bolts, which is difficult to disassemble and assemble. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a purification device, aiming to at least solve the technical problem that the side door is a flange and bolted to the cylinder body, which is difficult to disassemble and assemble.

[0005] The technical solution of the utility model is:

[0006] A purification device is special in that it includes: a cylinder with an inspection port opened at the end; a connecting piece that is flippably connected to the cylinder; a side door that is rotatably connected to the connecting piece; a gear that is rotatably provided on the cylinder; a rack that is provided on the circumference of the side door and can mesh with the gear, and the length of the rack is smaller than the circumference of the side door; wherein the connecting piece can drive the side door to switch between a first position and a second position, when the side door is in the first position, the side door blocks the inspection port, and the gear meshes with the rack, and when the side door is in the second position, the side door opens the inspection port, and the gear is separated from the rack.

[0007] In some embodiments, the purification device further comprises: a locking assembly, which is disposed on the cylinder and can lock the gear.

[0008] In some embodiments, the locking assembly includes: a support member, which is provided on the cylinder, the support member is provided with a groove, and the gear is at least partially provided in the groove; and a manual locking member, which is provided on the support member and can be switched between a third position and a fourth position. When the manual locking member is in the third position, the manual locking member locks the gear, and when the manual locking member is in the fourth position, the manual locking member unlocks the gear.

[0009] In some embodiments, the locking assembly also includes: a pressure sensor for detecting the pressure inside the cylinder; an electric locking member, which is provided on the support member and can be switched between a fifth position and a sixth position, and the electric locking member is electrically connected to the pressure sensor; wherein, when the electric locking member is in the fifth position, the electric locking member locks the gear, and when the electric locking member is in the sixth position, the electric locking member unlocks the gear.

[0010] In some embodiments, a feed port is provided at the top of the cylinder, and a discharge port is provided at the end of the cylinder away from the inspection port.

[0011] In some embodiments, the diameter of the barrel is greater than three times the diameter of the feed port.

[0012] In some embodiments, a filter screen plate is provided in the cylinder, and the filter screen plate is located between the feed port and the discharge port.

[0013] In some embodiments, the filter screen plate is provided with a plurality of screen holes, and the sum of the areas of the plurality of screen holes is greater than or equal to 1.2 times the area of ​​the feed port.

[0014] In some embodiments, a sewage outlet is provided on the cylinder, and the sewage outlet is located between the filter screen plate and the feed port.

[0015] In some embodiments, the purification device further comprises: a hand wheel connected to the gear.

[0016] The beneficial effects of the utility model include at least:

[0017] Since an inspection port is provided at the end of the cylinder body, the connecting piece can be flipped and connected to the cylinder body, the side door can be rotatably connected to the connecting piece, the gear can be rotatably arranged on the cylinder body, the rack is arranged on the circumferential surface of the side door and can mesh with the gear, the length of the rack is smaller than the circumference of the side door, the connecting piece can drive the side door to switch between the first position and the second position, when the side door is in the first position, the side door blocks the inspection port, the gear meshes with the rack, when the side door is in the second position, the side door opens the inspection port, the gear is separated from the rack, therefore, when it is necessary to remove debris and large pieces of scars in the slurry, the gear is turned, and the gear drives the side door to rotate on the connecting piece through the rack until the gear is separated from the rack, and the side door is pulled, and the side door is opened through the connecting piece The connecting piece flips on the cylinder until the side door reaches the second position, and the inspection port is opened. The staff can enter the cylinder through the inspection port to remove the debris and large scabs in the slurry. After the debris and large scabs in the slurry are removed, the side door is pushed, and the side door flips on the cylinder through the connecting piece until the side door reaches the first position. The side door blocks the inspection port, and the side door is rotated until the gear and the rack are engaged. The side door can be locked to ensure the smooth purification process of the slurry in the production process of aluminum hydroxide. There is no need to disassemble and assemble the bolts and flanges, which is convenient for the side door to open or close the inspection port, reducing the labor intensity of opening or closing the inspection port, reducing the waste of manpower in the production process, and facilitating maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a main diagram of a purification device in some embodiments;

[0020] Figure 2 for Figure 1 A top view of the purification device;

[0021] Figure 3 for Figure 1 Side view of the purification unit.

[0022] In the attached figure:

[0023] Cylinder 10;

[0024] Connector 20;

[0025] Side door 30;

[0026] Gear 40;

[0027] Rack 50;

[0028] Locking assembly 60, support member 601;

[0029] Pressure sensor 70;

[0030] Hand wheel 80;

[0031] Support frame 90;

[0032] Handle 100. DETAILED DESCRIPTION

[0033] 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 of 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.

[0034] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their 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 addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0037] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0038] The purification device provided in this embodiment is intended to at least to some extent solve the technical problem that the side door is a flange fastened to the cylinder with bolts and is difficult to disassemble and assemble.

[0039] Figure 1 is a main diagram of a purification device in some embodiments; Figure 2 for Figure 1 A top view of the purification device; Figure 3 for Figure 1 Side view of the purification unit. Figure 1 FIG. 1 is a schematic diagram of the structure of this embodiment. Figure 1 , Figure 2 and Figure 3 The purification device of this embodiment includes: a cylinder 10, a connecting member 20, a side door 30, a gear 40 and a rack 50. An inspection port is provided at the end of the cylinder 10. The connecting member 20 can be connected to the cylinder 10 in a flip-over manner. The side door 30 is rotatably connected to the connecting member 20. The gear 40 is rotatably arranged on the cylinder 10. The rack 50 is arranged on the circumference of the side door 30 and can be engaged with the gear 40. The length of the rack 50 is less than the circumference of the side door 30. Among them, the connecting member 20 can drive the side door 30 to switch between the first position and the second position. When the side door 30 is in the first position, the side door 30 blocks the inspection port, and the gear 40 is engaged with the rack 50. When the side door 30 is in the second position, the side door 30 opens the inspection port, and the gear 40 is separated from the rack 50.

[0040] The cross-sectional shape of the rack 50 may be an arc shape.

[0041] The cross-sectional shape of the connecting member 20 may be L-shaped.

[0042] The connecting member 20 is rotatably connected to the outer surface of the cylinder 10 .

[0043] The connecting member 20 may be connected to the cylinder 10 via a rotating shaft.

[0044] The side door 30 may be connected to the connecting member 20 via a rotating shaft.

[0045] Since an inspection port is provided at the end of the cylinder 10, the connecting piece 20 can be flippedly connected to the cylinder 10, the side door 30 can be rotatably connected to the connecting piece, the gear 40 can be rotatably arranged on the cylinder 10, the rack 50 is arranged on the circumference of the side door 30, and can mesh with the gear 40, the length of the rack 50 is less than the circumference of the side door 30, the connecting piece 20 can drive the side door 30 to switch between the first position and the second position, when the side door 30 is in the first position, the side door 30 blocks the inspection port, the gear 40 meshes with the rack 50, when the side door 30 is in the second position, the side door 30 opens the inspection port, and the gear 40 is separated from the rack 50. Therefore, when it is necessary to remove debris and large pieces of scars in the slurry, the gear 40 is rotated, and the gear 40 drives the side door 30 to rotate on the connecting piece 20 through the rack 50 until the gear 40 is separated from the rack 50. Pull the side door 30, and the side door 30 flips on the cylinder 10 through the connecting piece 20 until the side door 30 reaches the second position, and the inspection port is opened. The staff can enter the cylinder 10 through the inspection port to remove the debris and large scabs in the slurry. After the debris and large scabs in the slurry are removed, push the side door 30, and the side door 30 flips on the cylinder 10 through the connecting piece 20 until the side door 30 reaches the first position. The side door 30 blocks the inspection port, and rotates the side door 30 until the gear 40 is engaged with the rack 50. The side door 30 can be locked to ensure that the slurry purification process in the aluminum hydroxide production process proceeds smoothly. There is no need to disassemble and assemble the bolts and flanges, which makes it easy for the side door 30 to open or close the inspection port, reduces the labor intensity of opening or closing the inspection port of the side door 30, reduces the waste of manpower in the production process, and facilitates maintenance.

[0046] In some embodiments, a soft seal is used between the side door 30 and the inspection port to avoid static leakage when the side door 30 closes the inspection port, thereby ensuring smooth purification of the slurry during the aluminum hydroxide production process.

[0047] Combination Figure 3 In some embodiments, when the side door 30 is located at the first position, in order to prevent the gear 40 from being separated from the rack 50, the purification device further includes: a locking assembly 60. The locking assembly 60 is disposed on the cylinder 10 and can lock the gear 40. The gear 40 is locked by the locking assembly 60 to ensure that the position of the gear 40 is determined, to prevent the gear 50 from rotating, and to ensure the stability of the side door 30 closing the inspection port.

[0048] In some embodiments, in order to achieve the locking of the gear 40, the locking assembly 60 includes: a support member 601 and a manual locking member. The support member 601 is arranged on the cylinder 10, and the support member 601 is provided with a groove, and the gear 40 is at least partially arranged in the groove. The manual locking member is arranged on the support member 601 and can be switched between a third position and a fourth position. When the manual locking member is in the third position, the manual locking member locks the gear 40, and when the manual locking member is in the fourth position, the manual locking member unlocks the gear 40. The support member 601 is connected to the outer surface of the cylinder 10, and the support member 601 is supported by the outer surface of the cylinder 10.

[0049] In some embodiments, when the side door 30 is in the first position, the manual locking member is in the third position, and the manual locking member locks the gear 40 to ensure that the position of the gear 40 is determined, to prevent the gear 50 from rotating, to prevent the gear 40 from separating from the rack 50, to ensure the stability of the side door 30 closing the inspection port, to prevent the slurry in the cylinder 10 from leaking, and to ensure safety. When the inspection port is to be opened, that is, to switch the side door 30 from the first position to the second position, the manual locking member is in the fourth position, the manual locking member unlocks the gear 40, so that the gear 40 can rotate, and the gear 40 drives the side door 30 to rotate on the connecting member 20 through the rack 50 until the gear 40 separates from the rack 50, and the side door 30 is pulled, and the side door 30 is flipped on the cylinder 10 through the connecting member 20 until the side door 30 reaches the second position, and the inspection port is opened.

[0050] In some embodiments, the manual locking member may include a ball screw and a first insert. The first insert is disposed in the groove, the fixed end of the ball screw is disposed on the support member 601 and disposed outside the groove, the action end of the ball screw passes through the support member 601 and is connected to the first insert, and drives the first insert to switch between the third position and the fourth position.

[0051] In some embodiments, when the side door 30 is in the first position, the ball screw is operated, and the action end of the ball screw drives the first insert to the third position, and the first insert is inserted into the tooth groove of the gear 40, and the gear 40 is locked to ensure that the position of the gear 40 is determined, and the gear 50 is prevented from rotating, and the gear 40 is prevented from separating from the rack 50, so as to ensure the stability of the side door 30 closing the inspection port, and to prevent the slurry in the cylinder 10 from leaking, so as to ensure safety. When the inspection port is to be opened, that is, when the side door 30 is to be switched from the first position to the second position, the ball screw is operated, and the action end of the ball screw drives the first insert to the fourth position, and the first insert is separated from the tooth groove of the gear 40, and the gear 40 is unlocked, so that the gear 40 can rotate, and the gear 40 drives the side door 30 to rotate on the connecting member 20 through the rack 50 until the gear 40 is separated from the rack 50, and the side door 30 is pulled, and the side door 30 is turned on the cylinder 10 through the connecting member 20 until the side door 30 reaches the second position, and the inspection port is opened.

[0052] In some embodiments, in order to prevent the material in the cylinder 10 from injuring people, the locking assembly further includes: a pressure sensor 70 and an electric locking member. The pressure sensor is used to detect the pressure in the cylinder 10. The electric locking member is arranged on the support member 601 and can be switched between the fifth position and the sixth position. The electric locking member is electrically connected to the pressure sensor 70. When the electric locking member is in the fifth position, the electric locking member locks the gear 40, and when the electric locking member is in the sixth position, the electric locking member unlocks the gear 40.

[0053] In some embodiments, the pressure sensor 70 detects the pressure in the cylinder 10. When the pressure in the cylinder 10 is greater than the set threshold, the electric locking member is located in the fifth position, and the electric locking member locks the gear 40, so that the gear 40 cannot rotate. That is, even if the manual locking member unlocks the gear 40, the gear 40 still cannot rotate, so that the side door 30 cannot be opened, thereby avoiding the pressure of the material in the cylinder 10 from exceeding the limit, reducing the risk of material splashing and injuring people, and ensuring the safety of the staff. When the pressure in the cylinder 10 is less than or equal to the set threshold, the electric locking member is located in the sixth position, the electric locking member unlocks the gear 40, and then the manual locking member unlocks the gear 40, so that the gear 40 can rotate, and the gear 40 drives the side door 30 to rotate on the connecting member 20 through the rack 50 until the gear 40 is separated from the rack 50, and the side door 30 is pulled, and the side door 30 is turned on the cylinder 10 through the connecting member 20 until the side door 30 reaches the second position and the inspection port is opened. The set threshold can be 30kPa.

[0054] In some embodiments, the electric locking member may include an electric push rod and a second insert. The second insert is disposed in the groove, the fixed end of the electric push rod is disposed on the support member 601, the action end of the electric push rod is connected to the second insert, and drives the second insert to switch between the fifth position and the sixth position.

[0055] In some embodiments, when the pressure in the cylinder 10 is greater than the set threshold, the action end of the electric push rod drives the second insert to the fifth position, and the second insert is inserted into the tooth groove of the gear 40 to lock the gear 40 to ensure that the position of the gear 40 is determined and prevent the gear 50 from rotating. That is to say, even if the manual locking member unlocks the gear 40, the gear 40 still cannot rotate, so that the side door 30 cannot be opened, thereby preventing the pressure of the material in the cylinder 10 from exceeding the limit, reducing the risk of material splashing and injuring people, and ensuring the safety of the staff. When the pressure in the cylinder 10 is less than or equal to the set threshold, the action end of the electric push rod drives the second insert to the sixth position, the second insert is separated from the tooth groove of the gear 40, the gear 40 is unlocked, and then the manual locking member unlocks the gear 40, so that the gear 40 can rotate, and the gear 40 drives the side door 30 to rotate on the connecting member 20 through the rack 50 until the gear 40 is separated from the rack 50, and the side door 30 is pulled, and the side door 30 is flipped on the cylinder 10 through the connecting member 20 until the side door 30 reaches the second position, and the inspection port is opened.

[0056] In some embodiments, the purification device further includes: a controller. The controller is electrically connected to the electric locking member and the pressure sensor 70 respectively. The pressure sensor 70 sends the detected pressure value to the controller, and the controller compares the pressure value with a set threshold value. If the pressure value is greater than the set threshold value, the controller sends a locking signal to the electric locking member, so that the electric locking member is located at the fifth position. If the pressure value is less than or equal to the set threshold value, the controller sends an unlocking signal to the electric locking member, so that the electric locking member is located at the sixth position.

[0057] In some embodiments, in order to facilitate the pressure sensor 70 to detect the pressure inside the cylinder 10, an installation opening is opened at the top of the cylinder 10, and the pressure sensor 70 is installed in the installation opening, so that the pressure sensor 70 can detect the pressure of the cylinder 10 in real time.

[0058] In some embodiments, in order to ensure smooth purification of the slurry during aluminum hydroxide production, a feed inlet is provided at the top of the cylinder 10, and a discharge port is provided at the end of the cylinder 10 away from the inspection port.

[0059] In some embodiments, in order to reduce the resistance of the high-discharged material during the conveying process, the diameter of the cylinder 10 is greater than three times the diameter of the feed port.

[0060] In some embodiments, in order to purify the slurry in the aluminum hydroxide production process, a filter screen plate is provided in the cylinder 10, and the filter screen plate is located between the feed port and the discharge port. The slurry can be purified by the filter screen plate.

[0061] In some embodiments, the filter screen plate is detachably disposed in the cylinder 10 to facilitate replacement of the filter screen plate.

[0062] In some embodiments, guide rails are welded on both sides of the filter screen plate, and the guide rails support the weight of the filter screen plate. The guide rails are then fixed in the cylinder 10 by bolts to facilitate replacement of the filter screen plate.

[0063] In some embodiments, the filter screen plate can be made of 304 stainless steel mesh screen plate, which is easy to clean and has strong wear resistance. It is suitable for the characteristics of aluminum hydroxide slurry with many particles, fast flow rate and large wear, and can extend the service life, be recycled and repairable. The thickness of the filter screen plate can be 5 mm.

[0064] In some embodiments, in order to avoid affecting the throughput of the material, a plurality of sieve holes are provided on the filter screen plate, and the sum of the areas of the plurality of sieve holes is greater than or equal to 1.2 times the area of ​​the feed port, so as to ensure the normal transportation of the material and avoid excessive pressure between the filter screen plate and the side door 30 to ensure safety. The diameter of the sieve hole may be 5±0.1 mm.

[0065] In some embodiments, in order to directly discharge the smaller particles of debris screened out, a sewage outlet is provided on the cylinder 10, and the sewage outlet is located between the filter screen plate and the feed port, which reduces the cleaning workload of the staff and reduces the labor intensity. At the same time, during the aluminum hydroxide production process, the sewage outlet can also be opened to discharge part of the slurry through the sewage outlet, so that the staff can observe and analyze the changes in the debris in the slurry.

[0066] Combination Figure 1 , Figure 2 and Figure 3 In some embodiments, in order to facilitate the operation of the gear 40 to rotate, the purification device further includes: a hand wheel 80. The hand wheel 80 is connected to the gear 40. When the gear 40 is to be rotated, the staff can operate the hand wheel 80, and the hand wheel 80 drives the gear 40 to rotate, so as to facilitate the staff to operate. Among them, the hand wheel 80 can be coaxially arranged with the gear 40.

[0067] Combination Figure 1 and Figure 3 In some embodiments, in order to ensure the stability of the installation of the cylinder 10, the purification device further includes: a support frame 90. The cylinder 10 is arranged on the support frame 90, and the cylinder 10 is supported by the support frame 90.

[0068] Combination Figure 2In some embodiments, in order to facilitate switching the side door 30 from the first position to the second position, the purification device further includes a handle 100. The handle 100 is provided on the side door 30, and the staff can pull the handle 100 to switch the side door 30 from the first position to the second position.

[0069] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0071] In the description of the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0072] 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 different embodiments or examples described in this specification.

[0073] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0074] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A purification device, characterized in that: include: The cylinder body has an inspection port at the end; A connecting piece, connected to the cylinder in a flippable manner; A side door rotatably connected to the connecting member; A gear rotatably disposed on the cylinder; A rack, arranged on the circumference of the side door and meshing with the gear, wherein the length of the rack is smaller than the circumference of the side door; Wherein, the connecting member can drive the side door to switch between a first position and a second position. When the side door is in the first position, the side door blocks the inspection port, and the gear is engaged with the rack. When the side door is in the second position, the side door opens the inspection port, and the gear is separated from the rack.

2. The purification device according to claim 1, characterized in that: The purification device also includes: The locking assembly is arranged on the cylinder and can lock the gear.

3. The purification device according to claim 2, characterized in that: The locking assembly comprises: A support member is disposed on the cylinder, the support member is provided with a groove, and the gear is at least partially disposed in the groove; A manual locking member, disposed on the support member and capable of switching between a third position and a fourth position; Wherein, when the manual locking member is located at the third position, the manual locking member locks the gear, and when the manual locking member is located at the fourth position, the manual locking member unlocks the gear.

4. The purification device according to claim 3, characterized in that: The locking assembly also includes: A pressure sensor, used to detect the pressure inside the cylinder; an electric locking member, disposed on the support member and switchable between a fifth position and a sixth position, the electric locking member being electrically connected to the pressure sensor; Wherein, when the electric locking member is located at the fifth position, the electric locking member locks the gear, and when the electric locking member is located at the sixth position, the electric locking member unlocks the gear.

5. The purification device according to any one of claims 1 to 4, characterized in that: A feed port is provided at the top of the cylinder, and a discharge port is provided at the end of the cylinder away from the inspection port.

6. The purification device according to claim 5, characterized in that: The diameter of the cylinder is greater than three times the diameter of the feed port.

7. The purification device according to claim 5, characterized in that: A filter screen plate is provided in the cylinder, and the filter screen plate is located between the feed port and the discharge port.

8. The purification device according to claim 7, characterized in that: The filter screen plate is provided with a plurality of screen holes, and the sum of the areas of the plurality of screen holes is greater than or equal to 1.2 times the area of ​​the feed port.

9. The purification device according to claim 7, characterized in that: The cylinder is provided with a sewage outlet, and the sewage outlet is located between the filter screen plate and the feed inlet.

10. The purification device according to any one of claims 1 to 4, characterized in that: The purification device also includes: A hand wheel is connected with the gear.

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