Filter element barrel with filter material easy to replace and filter
By designing filter element barrels that are easy to replace filter material, the problem of difficulty in cleaning and secondary use of traditional filter elements is solved, and the convenient replacement and cleaning of filter materials is achieved, supporting secondary use, reducing water treatment costs, and improving filtration effect.
Patent Information
- Application Number
- CN202421534979.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-01
Smart Images
Figure CN222889429U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water treatment equipment, in particular to a filter core barrel and a filter with easily replaceable filter materials. Background Art
[0002] The conventional pool filter uses a paper filter element 1 for filtering, which blocks dirt through the pores of the filter paper 2, and the water that passes through the filter paper 2 flows out from the inner tank 3. Figure 1 and Figure 2 After the filter paper 2 is dirty, it is difficult to clean the filter and the filter paper 2 can only be discarded, which makes it difficult to reuse the filter paper 2 and causes waste. Utility Model Content
[0003] The utility model aims to provide a filter cartridge barrel and a filter with easily replaceable filter material, wherein the filter material is easy to take out and clean, and the filter material can be reused, thereby helping to reduce water treatment costs.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] A filter cartridge barrel for easily replacing filter media, comprising a barrel body and an upper cover, wherein the barrel body has a filter media cavity for placing filter media, the upper cover is detachably connected to the barrel body, and the upper cover blocks the filter media cavity;
[0006] The bottom of the barrel body is provided with a water outlet hole for outputting filtered water, and the outer wall and / or upper cover of the barrel body is provided with a water inlet hole for introducing water to be filtered, and the water inlet hole and the water outlet hole are both connected to the filter material cavity.
[0007] Through the above arrangement, the filter material can be easily taken out by simply separating the upper cover from the barrel body. The filter material is easy to clean and can be reused, which is beneficial to reducing water treatment costs. The position of the filter material can be limited by the barrel body and the upper cover, and the filter material will not be lost. In addition, the size of the filter cartridge barrel can be designed to be consistent with the size of the existing paper filter cartridge. The user can directly replace the filter cartridge barrel equipped with the filter material without replacing the filter, thereby reducing the user's replacement cost.
[0008] There are a plurality of water inlet holes, and the water inlet holes are located at the upper end of the barrel body;
[0009] The filter material cavity is also provided with at least one material blocking member for blocking the filter material. The material blocking members are arranged in sequence at intervals along the depth direction of the barrel body. The material blocking member divides the filter material cavity into a buffer chamber and at least one filter material sub-chamber. The buffer chamber is arranged close to the water outlet. The material blocking member is provided with a plurality of water permeable holes.
[0010] Through the above arrangement, the water to be filtered passes through the filter barrel from top to bottom, with a small filtering surface but a long depth, which is suitable for occasions with small flow but high filtering accuracy requirements. In addition, by setting a material blocking member to separate the buffer chamber, the loss of filter material can be avoided; and the multiple separated filter sub-chambers can be used to fill filter materials with different filtering accuracy respectively, such as coarse filtration first and then fine filtration, to improve the water filtration effect and extend the maintenance time of the filter material, and different filter materials will not mix because they are separated by the material blocking member.
[0011] The material blocking member includes at least one first material blocking member and at least one second material blocking member, and the first material blocking member and the second material blocking member are alternately arranged in sequence along the depth direction of the barrel body; the water permeable holes on the first material blocking member are located in the middle of the first material blocking member, and the water permeable holes on the second material blocking member are arranged at intervals along the edge of the second material blocking member. Through the above arrangement, the flow path of water in the filter material can be further extended to improve the filtering effect.
[0012] Several rows of water inlet hole groups are arranged at intervals along the depth direction of the barrel body, and each row of the water inlet hole groups includes at least one water inlet hole; a water outlet channel is provided on one side of the barrel body opposite to the water inlet hole group, and the water outlet channel is connected to the water outlet hole; and a plurality of water holes connected to the filter material cavity are provided on the channel wall of the water outlet channel. With this arrangement, the filtering surface is larger, but the depth is shorter, which is suitable for filtering with large flow and low precision.
[0013] The water outlet channel includes a vertical section and a horizontal section that are interconnected, the vertical section is arranged close to the outer wall of the barrel body, the horizontal section is arranged close to the barrel bottom of the barrel body, the first plugging piece is detachably sealed and connected to the port of the vertical section close to the barrel mouth of the barrel body, and the second plugging piece is detachably sealed and connected to the port of the horizontal section close to the side wall of the barrel body; the water hole is arranged in the vertical section, and the horizontal section is connected to the water outlet hole. After such arrangement, the water outlet channel can be easily cleaned.
[0014] The upper cover is also provided with a handle, which is detachably and rotatably connected to the upper cover; the upper cover is also provided with an escape opening for conveniently taking the handle. This arrangement can facilitate taking the filter cartridge barrel out of the filter.
[0015] At least two blocks are arranged on the outer edge of the upper cover, and a bayonet corresponding to the blocks is arranged on the outer edge of the barrel mouth of the barrel body, and the bayonet includes a positioning groove and a limiting groove which are connected to each other, and the positioning groove can be plugged with the block, and the limiting groove can be limited with the block, and when the block is inserted into the positioning groove, the upper cover is rotated, and the block can be inserted into the limiting groove. With this arrangement, the upper cover and the barrel body are very convenient and quick to load and unload.
[0016] The utility model also discloses a filter, which includes a housing, filter material and the above-mentioned filter cartridge barrel, wherein the filter cartridge barrel is placed in the inner cavity of the housing; a water inlet and a water outlet are provided on the housing, wherein the water inlet is connected to the water inlet through the inner cavity of the housing, and the water outlet is connected to the water outlet, and the water outlet and the water outlet are sealed and connected; the filter material is placed in the filter material cavity. The filter material of the filter thus arranged can be conveniently taken out and cleaned, and the filter material can be well reused, which is beneficial to reducing the cost of water treatment. In addition, the filtered dirt is not easy to be deposited in the housing, and the housing is more convenient to clean when the filter is maintained.
[0017] The water outlet is plugged into the water outlet hole, and a first sealing ring is installed on the water outlet and / or the water outlet hole, and the first sealing ring is used to seal the gap between the water outlet and the water outlet hole. After this arrangement, the filter cartridge barrel can be easily positioned in the filter, and the water to be filtered will not be mixed into the filtered water, thereby ensuring the water treatment effect.
[0018] The outer shell includes a lower shell, an upper shell and a locking ring. A clamping portion is provided on the edge of the barrel mouth of the barrel body. The upper shell is plugged into the lower shell, and the upper shell and the lower shell cooperate to clamp the clamping portion of the barrel body. A second sealing ring is installed on the upper shell and / or the lower shell, and the second sealing ring is used to seal the gap between the upper shell and the lower shell. The locking ring is threadedly connected to the lower shell, and the locking ring is limitedly matched with the upper shell. When the locking ring is limitedly matched with the upper shell, the upper shell abuts against the upper cover. Through the above arrangement, the filter can be easily opened to take out the filter cartridge barrel, and loading and unloading are convenient. Moreover, when the outer shell is assembled, the installation position of the filter cartridge barrel is stable, which is conducive to ensuring stable water filtration.
[0019] After adopting the above scheme, the utility model can conveniently take out the filter material for cleaning, and the filter material can be reused, which is conducive to reducing water treatment costs. In addition, the filtered dirt is not easy to be deposited in the outer shell of the filter, and the outer shell is more convenient to clean when the filter is maintained. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 Schematic diagram of a traditional paper filter element.
[0021] Figure 2 A cross-sectional view of a conventional filter.
[0022] Figure 3 Schematic diagram of the filter cartridge barrel of Example 1.
[0023] Figure 4 This is a schematic diagram of the decomposition of the filter cartridge barrel of Example 1.
[0024] Figure 5 It is a cross-sectional view of the filter cartridge barrel of Example 1.
[0025] Figure 62 is a cross-sectional view of the filter of Example 1.
[0026] Figure 7 This is a schematic diagram of the decomposition of the filter cartridge barrel of Example 2.
[0027] Figure 8 It is a cross-sectional view of the filter of the second embodiment.
[0028] Fig. 9 This is a schematic diagram of the decomposition of the filter cartridge barrel of Example 3.
[0029] Fig.10 It is a cross-sectional view of the filter cartridge barrel of Example 3.
[0030] Fig.11 It is a cross-sectional view of the filter of Example 3.
[0031] Fig.12 Schematic diagram of the filter cartridge barrel of Example 4.
[0032] Fig.13 It is a schematic diagram of the decomposition of the filter cartridge barrel of Example 4.
[0033] Fig.14 It is a cross-sectional view of the filter cartridge barrel of Example 4.
[0034] Fig.15 for Fig.14 A-section view.
[0035] Fig.16 It is a cross-sectional view of the filter of Example 4.
[0036] Marking Description:
[0037] Barrel body 11, bayonet 111, positioning groove 112, limiting groove 113, filter material cavity 114, clamping portion 115, upper cover 12, block 121, handle 122, avoidance port 123, water outlet 13, water inlet 14, material blocking member 15, water permeable hole 151, first material blocking member 152, second material blocking member 153, water outlet channel 16, vertical section 161, horizontal section 162, water hole 163, first blocking member 17, second blocking member 18;
[0038] Filter material 20;
[0039] Upper shell 31 , lower shell 32 , locking ring 33 , first sealing ring 34 , second sealing ring 35 , water inlet 36 , water outlet 37 . DETAILED DESCRIPTION
[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0041] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0042] Embodiment 1
[0043] like Figure 3-5 As shown, this embodiment discloses a filter cartridge barrel with easily replaceable filter material 20, which includes a barrel body 11 and an upper cover 12, wherein the upper cover 12 is detachably connected to the barrel body 11, specifically, two clamping blocks 121 are evenly distributed on the outer circumference of the upper cover 12, and a clamping socket 111 corresponding to the clamping block 121 is provided on the outer edge of the barrel mouth of the barrel body 11, and the clamping socket 111 includes a positioning groove 112 and a limiting groove 113 which are interconnected, the groove depth direction of the positioning groove 112 is the length direction of the barrel body 11, and the groove depth direction of the limiting groove 113 is the circumferential direction of the barrel body 11, the positioning groove 112 can be plugged in with the clamping block 121, and the limiting groove 113 can be limited in position with the clamping block 121. When the upper cover 12 is connected to the barrel body 11, the block 121 is first inserted into the positioning groove 112, and then the upper cover 12 is rotated. At this time, the block 121 can be inserted into the limiting groove 113, thereby realizing the connection between the upper cover 12 and the barrel body 11. The loading and unloading of the upper cover 12 and the barrel body 11 is very convenient and quick.
[0044] The barrel body 11 is provided with a filter material cavity 114 for placing filter material 20, and the upper cover 12 can block the filter material cavity 114. A water outlet 13 for exporting filtered water is provided at the bottom of the barrel body 11, and a plurality of water inlet holes 14 for introducing water to be filtered are provided on the outer wall of the barrel body 11, and the water inlet holes 14 are located at the upper end of the barrel body 11. The water inlet holes 14 and the water outlet holes 13 are both connected to the filter material cavity 114. In addition, a plurality of water inlet holes 14 can also be provided on the upper cover 12 to increase the water intake. Of course, it is also possible to only provide the water inlet holes 14 on the upper cover 12, while the water inlet holes 14 are not provided on the barrel body 11. After such a setting, the filtration path of the sewage is from top to bottom, the filtration area is small, but the filtration depth is long, and the filtration accuracy is higher, which is particularly suitable for the case of small flow and high-precision filtration. Moreover, the filter material 20 can be easily taken out by simply separating the upper cover 12 from the barrel body 11 . The filter material 20 is easy to clean and can be reused, which helps to reduce water treatment costs.
[0045] In this case, the aperture of the water inlet 14 is relatively small, and it can block the filter material 20. However, only one water outlet 13 is designed, and its aperture is relatively large. This is designed so that the filter cartridge barrel can be well matched with the existing filter using a paper filter element, so as to facilitate the filter to switch to the filter cartridge barrel of the utility model. In order to prevent the filter material 20 from flowing out of the water outlet 13, a material blocking member 15 for blocking the filter material 20 is provided in the filter material cavity 114, and the shape of the material blocking member 15 is adapted to the inner cavity cross-section of the filter material cavity 114. The material blocking member 15 is evenly provided with a plurality of water-permeable holes 151 through which the filter material 20 cannot pass but through which water can pass. The material blocking member 15 is placed at the bottom of the filter material chamber 114, which separates the filter material chamber 114 into a filter material 20 sub-chamber and a buffer chamber. The filter material 20 sub-chamber is located above the buffer chamber, and the buffer chamber is connected to the water outlet 13. The filter material 20 sub-chamber is used to place the filter material 20, and the filter material 20 is not allowed to enter the buffer chamber. The buffer chamber can play a role in water collection and buffering, which is conducive to uniform water outlet.
[0046] In order to facilitate the removal of the filter cartridge barrel from the filter, a handle 122 is provided on the upper cover 12 , and the handle 122 is detachably and rotatably connected to the upper cover 12 . In addition, an escape opening 123 for conveniently taking out the handle 122 is provided on the upper cover 12 .
[0047] like Figure 6 As shown, it is a filter using the above filter cartridge barrel, the filter also includes a housing and filter material 20, the filter cartridge barrel is placed in the inner cavity of the housing, and the filter material 20 is placed in the filter material cavity 114, more specifically, the filter material 20 is placed in the filter material 20 sub-chamber, generally speaking, it is better that the filter material 20 fills the filter material 20 sub-chamber. The filter material 20 can be a filter medium such as fiber balls, cloth, sand, etc.
[0048] The outer shell includes a lower shell 32, an upper shell 31 and a locking ring 33. A clamping portion 115 is provided at the edge of the barrel mouth of the barrel body 11. The upper shell 31 is plugged with the lower shell 32, and the upper shell 31 and the lower shell 32 cooperate to clamp the clamping portion 115 of the barrel body 11, and the bayonet 111 can be set on the clamping portion 115. A second sealing ring 35 is installed on the upper shell 31 and / or the lower shell 32, and the second sealing ring 35 is used to seal the gap between the upper shell 31 and the lower shell 32 to avoid water leakage. The locking ring 33 is threadedly connected to the lower shell 32, and the locking ring 33 is limitedly matched with the upper shell 31. When the locking ring 33 is limitedly matched with the upper shell 31, the upper shell 31 abuts against the upper cover 12 to ensure that the filter cartridge barrel is installed firmly. Through the above arrangement, the filter can be easily opened to remove the filter cartridge barrel, and it is convenient to load and unload. Moreover, when the outer shell is assembled, the installation position of the filter cartridge barrel is stable, which is conducive to ensuring the stable water filtration.
[0049] A water inlet 36 and a water outlet 37 are provided on the lower shell 32. The water inlet 36 is connected to the water inlet hole 14 through the inner cavity of the shell, and the sewage (water to be filtered) can be introduced into the filter cartridge barrel. The water outlet 37 is connected to the water outlet hole 13, and the water outlet 37 and the water outlet hole 13 are sealed. Specifically, the water outlet 37 is plugged into the water outlet hole 13, and a first sealing ring 34 is installed on the water outlet hole 13. The first sealing ring 34 is used to seal the gap between the water outlet 37 and the water outlet hole 13. After such a setting, the filter cartridge barrel can be easily positioned in the filter, and the sewage can be isolated from the filtered water. The flow path of the sewage in this embodiment is: water inlet 36 → inner cavity of the shell → water inlet hole 14 → filter material cavity 114 → water outlet hole 13 → water outlet 37.
[0050] After the above arrangement, the filter cartridge barrel can be easily removed from the filter, and the filter material 20 can also be easily removed from the filter cartridge barrel and cleaned, and the filter material 20 can be well reused, which is conducive to reducing water treatment costs. In addition, the dirt filtered out by the filter material 20 is not easy to be deposited in the shell, and the shell is more convenient to clean when the filter is maintained.
[0051] Embodiment 2
[0052] like Figure 7-8 As shown, the difference between this embodiment and the first embodiment is that two material blocking members 15 are provided, and the two material blocking members 15 are arranged in sequence along the depth direction of the barrel body 11, and the material blocking members 15 divide the filter material chamber 114 into a buffer chamber and two filter material 20 sub-chambers. The two filter material 20 sub-chambers are respectively filled with filter materials 20 of different filtering precisions. For example, the filter material 20 of the upper layer performs coarse filtering of sewage, and the filter material 20 of the lower layer performs fine filtering of sewage. In this way, the water filtration effect is improved, the maintenance time of the filter material 20 is extended, and different filter materials 20 are separated by the material blocking members 15 and will not mix. Of course, more material blocking members 15 can also be provided.
[0053] Embodiment 3
[0054] like Figure 9-11 As shown, the difference between this embodiment and the second embodiment is that the blocking member 15 includes at least one first blocking member 152 and at least one second blocking member 153, and the first blocking member 152 and the second blocking member 153 are arranged alternately in sequence along the depth direction of the barrel body 11. Among them, the water-permeable holes 151 on the first blocking member 152 are located in the middle position of the first blocking member 152, and the water-permeable holes 151 on the second blocking member 153 are arranged at intervals along the edge of the second blocking member 153. Through the above arrangement, the flow path of sewage in the filter material 20 can be further extended to improve the filtering effect. In this case, the blocking members 15 are, from top to bottom, the first blocking member 152, the second blocking member 153, the first blocking member 152 and the second blocking member 153. In this embodiment, the same filter material 20 can also be used in each filter material 20 sub-chamber.
[0055] Embodiment 4
[0056] like Figure 12-15 As shown, the difference between this embodiment and the first embodiment is that a plurality of rows of water inlet holes 14 are arranged at intervals along the depth direction of the barrel body 11, and each row of water inlet holes 14 includes at least one water inlet hole 14. A water outlet channel 16 is provided on one side of the barrel body 11 opposite to the water inlet hole 14 group, and the water outlet channel 16 includes a vertical section 161 and a horizontal section 162 that are connected to each other, wherein the vertical section 161 is arranged close to the outer wall of the barrel body 11, and the horizontal section 162 is arranged close to the bottom of the barrel body 11, and the first blocking member 17 is detachably sealed and connected to the port of the vertical section 161 close to the barrel mouth of the barrel body 11, and the second blocking member 18 is detachably sealed and connected to the port of the horizontal section 162 close to the side wall of the barrel body 11, and the first blocking member 17 and the second blocking member 18 can be plugs. The provision of the first blocking member 17 and the second blocking member 18 can prevent sewage from entering the water outlet channel 16 without being filtered, and can also facilitate the cleaning of the water outlet channel 16. One end of the horizontal section 162 away from the second blocking member 18 is connected to the water outlet 13, and a plurality of water holes 163 are provided in the lower half of the vertical section 161. The water outlet channel 16 is connected to the filter material chamber 114 through the water holes 163. In this embodiment, the material blocking member 15 is not provided, and the water holes 163 are used as a substitute.
[0057] like Fig.16 As shown, the sewage flow path of this embodiment is: water inlet 36 → inner cavity of the shell → water inlet hole 14 → filter material cavity 114 → water hole 163 → water outlet channel 16 → water outlet hole 13 → water outlet 37. This embodiment has a larger filtering surface but a shorter depth, which is particularly suitable for filtering with large flow and low precision.
[0058] The key point of the utility model is that the filter material 20 can be easily taken out for cleaning, and the filter material 20 can be reused, which is conducive to reducing water treatment costs. In addition, the filtered dirt is not easy to be deposited in the shell of the filter, and the shell is more convenient to clean when the filter is maintained.
[0059] The above description is only an embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A filter cartridge barrel with easy-to-replace filter material, characterized in that: It comprises a barrel body and an upper cover, wherein the barrel body has a filter material cavity for placing filter material, the upper cover is detachably connected to the barrel body, and the upper cover blocks the filter material cavity; The bottom of the barrel body is provided with a water outlet hole for outputting filtered water, and the outer wall and / or upper cover of the barrel body is provided with a water inlet hole for introducing water to be filtered, and the water inlet hole and the water outlet hole are both connected to the filter material cavity.
2. The filter cartridge barrel with easily replaceable filter material according to claim 1, characterized in that: There are a plurality of water inlet holes, and the water inlet holes are located at the upper end of the barrel body; The filter material cavity is also provided with at least one material blocking member for blocking the filter material. The material blocking members are arranged in sequence at intervals along the depth direction of the barrel body. The material blocking member divides the filter material cavity into a buffer chamber and at least one filter material sub-chamber. The buffer chamber is arranged close to the water outlet. The material blocking member is provided with a plurality of water permeable holes.
3. The filter cartridge barrel with easily replaceable filter material according to claim 2, characterized in that: The material blocking member includes at least one first material blocking member and at least one second material blocking member, and the first material blocking member and the second material blocking member are alternately arranged in sequence along the depth direction of the barrel body; the water permeable holes on the first material blocking member are located in the middle position of the first material blocking member, and the water permeable holes on the second material blocking member are arranged at intervals along the edge of the second material blocking member.
4. The filter cartridge barrel with easily replaceable filter material according to claim 1, characterized in that: A plurality of rows of water inlet hole groups are arranged at intervals along the depth direction of the barrel body, and each row of the water inlet hole groups includes at least one water inlet hole; a water outlet channel is provided on the side of the barrel body opposite to the water inlet hole group, and the water outlet channel is connected to the water outlet holes; a plurality of water holes connected to the filter material cavity are provided on the channel wall of the water outlet channel.
5. The filter cartridge barrel with easily replaceable filter material according to claim 4, characterized in that: The water outlet channel includes a vertical section and a horizontal section which are interconnected. The vertical section is arranged close to the outer wall of the barrel body, and the horizontal section is arranged close to the bottom of the barrel body. A first sealing piece is detachably sealed and connected to a port of the vertical section close to the barrel mouth of the barrel body, and a second sealing piece is detachably sealed and connected to a port of the horizontal section close to the side wall of the barrel body. The water hole is arranged in the vertical section, and the horizontal section is connected to the water outlet hole.
6. The filter cartridge barrel with easily replaceable filter material according to claim 1, characterized in that: The upper cover is also provided with a handle, and the handle is detachably and rotatably connected to the upper cover; the upper cover is also provided with an escape opening for facilitating taking out the handle.
7. The filter cartridge barrel with easily replaceable filter material according to claim 1, characterized in that: The outer edge of the upper cover is provided with at least two clamping blocks, and the outer edge of the barrel mouth of the barrel body is provided with a clamping mouth corresponding to the clamping blocks one by one, and the clamping mouth includes a positioning groove and a limiting groove that are connected to each other, the positioning groove can be plugged into and matched with the clamping block, and the limiting groove can be limited by the clamping block. When the clamping block is inserted into the positioning groove, the upper cover is rotated and the clamping block can be inserted into the limiting groove.
8. A filter, characterized in that: It comprises an outer shell, filter material and a filter cartridge barrel as described in any one of claims 1 to 7, wherein the filter cartridge barrel is placed in the inner cavity of the outer shell; a water inlet and a water outlet are provided on the outer shell, the water inlet is connected to the water inlet hole through the inner cavity of the outer shell, the water outlet is connected to the water outlet hole, and the water outlet and the water outlet hole are sealed together; the filter material is placed in the filter material cavity.
9. The filter according to claim 8, characterized in that: The water outlet is plugged into the water outlet hole, and a first sealing ring is installed on the water outlet and / or the water outlet hole. The first sealing ring is used to seal the gap between the water outlet and the water outlet hole.
10. The filter according to claim 8, characterized in that: The outer shell includes a lower shell, an upper shell and a locking ring. A clamping portion is provided on the edge of the barrel mouth of the barrel body. The upper shell is plugged into the lower shell, and the upper shell and the lower shell cooperate to clamp the clamping portion of the barrel body. A second sealing ring is installed on the upper shell and / or the lower shell, and the second sealing ring is used to seal the gap between the upper shell and the lower shell. The locking ring is threadedly connected to the lower shell, and the locking ring is limitedly matched with the upper shell. When the locking ring is limitedly matched with the upper shell, the upper shell abuts against the upper cover.