Storage tank

Abstract

The storage tank comprises a tank body and a bottom plate which are vertically through, a lower baffle ring is arranged at a lower port of the tank body, an inner ring cavity of the lower baffle ring forms a lower opening of the tank body, and the diameter of the lower opening is smaller than that of an inner cavity of the tank body; the diameter of the bottom plate is larger than that of the lower opening, the bottom plate is arranged in the inner cavity of the can body and abuts against the lower baffle ring, and the bottom plate seals the lower opening. When a user enables the bottom plate to penetrate through the lower opening, due to the fact that the can body is elastic and generates certain elastic deformation, the bottom plate can conveniently stretch into the inner cavity of the can body, after the bottom plate completely enters the inner cavity of the can body, the can body recovers the initial state, then the user enables the bottom plate to abut against the lower baffle ring, and due to the fact that the diameter of the bottom plate is larger than that of the lower opening, the bottom plate seals the lower opening. The storage tank is easy and fast to operate, and the manufacturing cost of the storage tank is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a storage tank. Background Art

[0002] The existing storage can includes a can body and a sealing cover. The bottom of the can body is closed, and an insertion portion with a diameter smaller than the diameter of the can body is provided on the upper part of the can body. The insertion portion has an opening for food to be placed in or out of the inner cavity of the can body. The sealing cover is detachably arranged on the storage can, and the insertion portion enters the inner cavity of the sealing cover, and the sealing cover closes the opening.

[0003] In the above storage tank, since the tank body needs to be provided with an insertion portion with a diameter smaller than that of the tank body, the tank body has two sections with different diameters (a large diameter portion and a small diameter portion), the process is complicated, and the tank cover needs to be designed so that the outer diameter of the tank cover is equal to the large diameter portion of the tank body, and the inner cavity diameter of the tank cover is equal to or smaller than the small diameter portion, so as to meet the characteristics of the storage tank being beautiful and the sealing cover and the insertion portion being tightly connected. The process is complicated and the cost is high. Utility Model Content

[0004] The utility model aims to provide a storage tank with simple structure, low cost and good use effect.

[0005] The purpose of the utility model is achieved in this way:

[0006] A storage tank comprises a tank body and a bottom plate which are connected vertically, wherein a lower retaining ring is arranged at the lower end of the tank body, an inner ring cavity of the lower retaining ring constitutes a lower opening of the tank body, and a diameter of the lower opening is smaller than a diameter of an inner cavity of the tank body;

[0007] The diameter of the bottom plate is greater than the diameter of the lower opening. The bottom plate is placed in the inner cavity of the can body and abuts against the lower retaining ring, and the bottom plate closes the lower opening.

[0008] When the user passes the bottom plate through the lower opening, the can body has an elastic deformation, which makes it easier for the bottom plate to extend into the inner cavity of the can body. When the bottom plate completely enters the inner cavity of the can body, the can body returns to its initial state. Then the user places the bottom plate against the lower retaining ring. Since the diameter of the bottom plate is larger than the diameter of the lower opening, the bottom plate closes the lower opening, thereby assembling a storage tank. The operation is simple and quick, which greatly reduces the manufacturing cost of the storage tank.

[0009] The purpose of the utility model can also be solved by the following technical measures:

[0010] Furthermore, glue is provided between the bottom plate and the lower retaining ring, and the bottom plate and the lower retaining ring are bonded together by the glue.

[0011] The glue bonds the bottom plate and the lower baffle plate, thereby fixing the bottom plate in the inner cavity of the tank body and closing the lower opening, greatly improving the sealing effect of the bottom of the storage tank.

[0012] Furthermore, the can body is a can body that penetrates from top to bottom and has elasticity, and the can body and the lower retaining ring are integrally formed, thereby reducing manufacturing costs.

[0013] Furthermore, the can body is a paper can body, and the bottom plate is a paper bottom plate. The paper can body and the paper bottom plate have low costs, and the paper can body box and the paper bottom plate adopt paper making technology, so that the paper can body box and the paper bottom plate have a certain elasticity, which facilitates the bottom plate to pass through the lower opening and squeeze into the inner cavity of the can body, reducing the difficulty of installing the bottom plate.

[0014] Furthermore, it also includes an upper cover plate, an upper retaining ring is arranged at the upper port of the can body, the inner ring cavity of the upper retaining ring constitutes the upper opening of the can body, and the diameter of the upper opening is smaller than the inner cavity diameter of the can body;

[0015] The diameter of the upper cover plate is greater than the diameter of the upper opening. The upper cover plate is placed in the inner cavity of the can body and abuts against the upper retaining ring. The upper cover plate closes the upper opening.

[0016] When the user passes the upper cover through the upper opening, the can body has a certain elastic deformation due to its elasticity, which makes it easier for the upper cover to extend into the inner cavity of the can body. When the upper cover completely enters the inner cavity of the can body, the can body returns to its initial state. Then the user places the bottom plate against the upper retaining ring. Since the diameter of the upper cover is larger than the diameter of the upper opening, the upper cover closes the upper opening.

[0017] Since the upper cover plate closes the upper opening and the bottom plate closes the lower opening, a storage tank closed from top to bottom is assembled, which is simple and quick to operate and greatly reduces the manufacturing cost of the storage tank.

[0018] Furthermore, the can body and the upper retaining ring are integrally formed, and the upper cover plate is a paper upper cover plate.

[0019] The can body and the upper retaining ring are integrally formed to reduce manufacturing costs. The cost of the paper upper cover is relatively low, and the paper upper cover adopts a paper-making process, which makes the paper upper cover have a certain elasticity, making it easy for the upper cover to pass through the upper opening and squeeze into the inner cavity of the can body, reducing the difficulty of installing the paper upper cover.

[0020] Furthermore, glue is provided between the upper cover plate and the upper retaining ring, and the upper cover plate and the upper retaining ring are bonded together by the glue.

[0021] The glue bonds the upper cover plate and the upper retaining ring, thereby fixing the upper cover plate in the inner cavity of the tank body and closing the upper opening, greatly improving the upper sealing effect of the storage tank.

[0022] Furthermore, the upper cover plate is provided with a discharge port, and the items in the storage tank are poured out through the discharge port.

[0023] Furthermore, the upper cover plate is provided with a discharge port, a sealing cover is provided at the discharge port, the sealing cover is connected to the upper cover plate, and a sawtooth line is provided at the connection between the sealing cover and the upper cover plate. The user can easily tear the tearing portion along the sawtooth line to expose the discharge port, and the user can pour out the items in the storage tank along the discharge port by inverting the storage tank, which is easy to operate.

[0024] Furthermore, a protective sheet is provided on the upper cover plate. The protective sheet is added to protect the discharge port to prevent the items in the storage tank from shaking and piercing the discharge port during transportation, thereby losing the sealing effect. It can also prevent people from deliberately piercing the discharge port and stealing the food in the storage tank, thereby improving the safety of the storage tank.

[0025] Furthermore, it also includes a diaphragm and a protective sheet, the diaphragm is arranged on the surface of the upper cover plate, the diaphragm is provided with a tearing portion corresponding to the discharge port, a serrated line is provided between the tearing portion and the diaphragm, the size of the protective sheet is larger than the size of the tearing portion, and the protective sheet is arranged on the diaphragm to close the tearing portion.

[0026] The storage tank has items stored therein, and the tear portion closes the discharge port to prevent the items in the storage tank from falling out during transportation. When a user needs to take out items in the storage tank, since the membrane is provided with a serrated line, the user can easily tear the tear portion along the serrated line to expose the discharge port. The user can pour the items in the storage tank out along the discharge port by inverting the storage tank. The operation is simple. Moreover, a protective sheet is added to protect the tear portion to prevent the items in the storage tank from shaking and piercing the tear portion during transportation, thereby losing the sealing effect. It can also prevent people from intentionally piercing the tear portion and stealing food in the storage tank, thereby improving the safety of the storage tank.

[0027] Furthermore, the upper cover plate is spaced apart with discharge holes, and further comprises a membrane and a protective sheet, wherein the membrane is arranged on the surface of the upper cover plate, the membrane is provided with a handle for tearing the membrane, and the protective sheet is arranged on the membrane.

[0028] The storage tank has items stored in it, and the diaphragm seals the discharge hole to prevent the items in the storage tank from falling out during transportation. When the user needs to take out the items in the storage tank, the user can lift the handle and pull it outward to easily peel off the diaphragm, thereby exposing the discharge hole. The user can invert the storage tank to pour the items in the storage tank out through the discharge hole, which is easy to operate. In addition, a protective sheet is added to protect the discharge hole to prevent the items in the storage tank from shaking and piercing the discharge hole during transportation, thereby losing the sealing effect. It can also prevent people from deliberately piercing the discharge hole and stealing food in the storage tank, thereby improving the safety of the storage tank.

[0029] Furthermore, it also includes a protective sheet, the protective sheet has an opening, the protective sheet is rotatably arranged on the upper cover plate, when the opening and the discharge port are misaligned, the protective sheet closes the discharge port, and when the opening and the discharge port are connected, the discharge port is opened. The above solution can open or close the discharge port by rotating the protective sheet, which is simple to operate and meets user needs.

[0030] Furthermore, it also includes a diaphragm, which is arranged on the protective sheet to close the opening.

[0031] Furthermore, the protection sheet is also provided with a pushing portion or a notch for facilitating the rotation of the protection sheet.

[0032] The beneficial effects of the utility model are as follows:

[0033] According to the utility model, when the user passes the bottom plate through the lower opening, the can body has an elasticity, so the can body produces a certain elastic deformation, which facilitates the bottom plate to extend into the inner cavity of the can body. When the bottom plate completely enters the inner cavity of the can body, the can body returns to its initial state. Then the user places the bottom plate against the lower baffle ring. Since the diameter of the bottom plate is larger than the diameter of the lower opening, the bottom plate closes the lower opening. Then the bottom plate and the lower baffle are bonded together with glue, so as to fix the bottom plate in the inner cavity of the can body and close the lower opening, thereby greatly improving the bottom sealing effect of the storage tank. The upper cover is also assembled in the above manner. Therefore, the process of assembling the storage tank is simple and quick, thereby greatly reducing the manufacturing cost of the storage tank. Moreover, the can body is a paper can body, the bottom plate is a paper bottom plate, and the upper cover is a paper upper cover, thereby greatly reducing the cost of the storage tank.

[0034] According to the utility model, items are stored in the storage tank, and the sealing cover seals the discharge port to prevent the items in the storage tank from falling out during transportation. When the user needs to take out the items in the storage tank, since the upper cover is provided with a serrated line, the user can easily tear the sealing cover along the serrated line to expose the discharge port. The user can invert the storage tank to pour out the items in the storage tank along the discharge port, and the operation is simple.

[0035] According to the utility model, items are stored in the storage tank, and the tear portion closes the discharge port to prevent the items in the storage tank from falling out during transportation. When the user needs to take out the items in the storage tank, since the diaphragm is provided with a serrated line, the user can easily tear the tear portion along the serrated line to expose the discharge port. The user can pour the items in the storage tank out along the discharge port by inverting the storage tank, and the operation is simple.

[0036] The utility model stores items in the storage tank, and the diaphragm seals the discharge hole to prevent the items in the storage tank from falling out during transportation. When the user needs to take out the items in the storage tank, the user can lift the handle and pull it outward to easily peel off the diaphragm to expose the discharge hole. The user can invert the storage tank to pour the items in the storage tank out along the discharge hole, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the storage tank of Example 1 (excluding the protective sheet).

[0038] Figure 2 This is a cross-sectional view of the storage tank of Example 1 (without the protective sheet and the membrane, and with the sealing cover torn off).

[0039] Figure 3 for Figure 2 A magnified view of part A.

[0040] Figure 4 for Figure 2 Enlarged view of part B.

[0041] Figure 5 This is a schematic diagram of the upper cover plate of Example 1.

[0042] Figure 6 Schematic diagram of the base plate of Example 1.

[0043] Figure 7 Schematic diagram of the storage tank of Example 2 (including the protective sheet).

[0044] Figure 8 This is a schematic diagram of the storage tank of Example 3 (without the protective sheet).

[0045] Fig. 9 Schematic diagram of the diaphragm of Example 3.

[0046] Fig.10 This is a cross-sectional view of the storage tank of Example 3 (including a protective sheet, a diaphragm, an upper cover plate and a bottom plate).

[0047] Fig.11 for Fig.10 Enlarged view of part C.

[0048] Fig.12 This is a schematic diagram of the upper cover plate of Example 4.

[0049] Fig.13 This is a schematic diagram of another upper cover plate of Example 4.

[0050] Fig.14 Schematic diagram of the diaphragm of Example 4.

[0051] Fig.15 This is a cross-sectional view of the storage tank of Example 5 (the opening and the discharge port are misaligned).

[0052] Fig.16 It is a cross-sectional view of the storage tank of Example 5 (the membrane is torn off and the opening is connected to the discharge port).

[0053] Fig.17Schematic diagram of the protective sheet of Example 5 (without film attached).

[0054] Fig.18 Schematic diagram of the protective sheet of Example 5 (after the film is attached). DETAILED DESCRIPTION

[0055] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0056] Embodiment 1, combination Figures 1 to 6 As shown, a storage tank comprises a tank body 1 and a bottom plate 2, wherein a lower retaining ring 3 is arranged at the lower end of the tank body 1, and an inner ring cavity of the lower retaining ring 3 constitutes a lower opening 31 of the tank body 1, and a diameter of the lower opening 31 is smaller than a diameter of an inner cavity of the tank body 1;

[0057] The diameter of the bottom plate 2 is greater than the diameter of the lower opening 31 . The bottom plate 2 is placed in the inner cavity of the can body 1 and abuts against the lower retaining ring 3 . The bottom plate 2 closes the lower opening 31 .

[0058] Furthermore, glue 4 is provided between the bottom plate 2 and the lower retaining ring 3 , and the bottom plate 2 and the lower retaining ring 3 are bonded together by the glue 4 .

[0059] Furthermore, the can body 1 is a can body 1 that penetrates from top to bottom and has elasticity, and the can body 1 and the lower retaining ring 3 are integrally formed.

[0060] Furthermore, the can body 1 is a paper can body 1, and the bottom plate 2 is a paper bottom plate 2.

[0061] Furthermore, it also includes an upper cover plate 5, an upper retaining ring 6 is provided at the upper end of the can body 1, the inner ring cavity of the upper retaining ring 6 constitutes an upper opening 61 of the can body 1, and the diameter of the upper opening 61 is smaller than the inner cavity diameter of the can body 1;

[0062] The diameter of the upper cover plate 5 is greater than the diameter of the upper opening 61 . The upper cover plate 5 is placed in the inner cavity of the can body 1 and abuts against the upper retaining ring 6 . The upper cover plate 5 closes the upper opening 61 .

[0063] Furthermore, the can body 1 and the upper retaining ring 6 are integrally formed, and the upper cover plate 5 is a paper upper cover plate 5 .

[0064] Furthermore, glue 4 is provided between the upper cover plate 5 and the upper retaining ring 6 , and the upper cover plate 5 and the upper retaining ring 6 are bonded together by the glue 4 .

[0065] Furthermore, the upper cover plate 5 is provided with a discharge port 51 , a sealing cover 511 is provided at the discharge port 51 , the sealing cover 511 is connected to the upper cover plate 5 , and a sawtooth line 72 is provided at the connection between the sealing cover 511 and the upper cover plate 5 .

[0066] The upper cover plate 5 closes the upper opening 61 of the can body 1:

[0067] Glue 4 is applied to the upper retaining ring 6, and then the user passes the upper cover plate 5 through the upper opening 61 or the lower opening 31. Since the can body 1 is an elastic can body 1, the can body 1 produces a certain elastic deformation, which is convenient for the upper cover plate 5 to extend into the inner cavity of the can body 1. When the upper cover plate 5 completely enters the inner cavity of the can body 1, the can body 1 returns to its initial state. Then the user places the upper cover plate 5 against the upper retaining ring 6, and the glue 4 bonds the upper cover plate 5 and the upper retaining ring 6, thereby fixing the upper cover plate 5 in the inner cavity of the can body 1 and closing the upper opening 61.

[0068] Furthermore, the process of closing the upper opening 61 of the can body 1 with the upper cover plate 5 and the process of closing the lower opening 31 of the can body 1 with the bottom plate 2 can be fully assembled or partially assembled in the factory (for example, the upper cover plate and the can body are assembled or the bottom plate and the can body are assembled) or the user can complete the full assembly or the remaining assembly in the factory.

[0069] Storage tanks to place items:

[0070] The user turns the storage tank upside down and puts the items into the inner cavity of the storage tank through the lower opening 31 .

[0071] The bottom plate 2 closes the lower opening 31 of the can body 1:

[0072] Glue 4 is applied to the lower retaining ring 3, and then the user passes the bottom plate 2 through the lower opening 31. Since the can body 1 is an elastic can body 1, the can body 1 produces a certain elastic deformation, which facilitates the bottom plate 2 to extend into the inner cavity of the can body 1. When the bottom plate 2 completely enters the inner cavity of the can body 1, the can body 1 returns to its initial state. Then the user places the bottom plate 2 against the lower retaining ring 3, and the glue 4 bonds the bottom plate 2 and the lower retaining ring 3, thereby fixing the bottom plate 2 in the inner cavity of the can body 1 and closing the upper opening 61.

[0073] The user takes the items from the storage tank:

[0074] The user can easily tear open the cover 511 along the serrated line 72 to expose the discharge port 51 . The user can pour out the items in the storage tank along the discharge port 51 by turning the storage tank upside down. The operation is simple.

[0075] Combination Figure 7 As shown, the difference between Example 2 and Example 1 is:

[0076] Furthermore, a protection sheet 10 is included, and the protection sheet 10 is arranged on the upper cover plate 5 .

[0077] Adding protective sheets to improve the safety of storage tanks:

[0078] The protective sheet 10 is added to protect the cover 511 to prevent the contents of the storage tank from shaking and piercing the cover 511 during transportation, thereby losing the sealing effect. It can also prevent people from intentionally piercing the cover 511 and stealing the food in the storage tank, thereby improving the safety of the storage tank.

[0079] The user takes the items from the storage tank:

[0080] The user first takes out the protection sheet 10 , and then the user can easily tear open the cover 511 along the serrated line 72 to expose the discharge port 51 . The user can turn the storage tank upside down to pour out the items in the storage tank along the discharge port 51 , which is easy to operate.

[0081] Combination Figures 8 to 11 As shown, the difference between Example 3 and Example 1 is:

[0082] Furthermore, the upper cover plate 5 is provided with a discharge port 51 .

[0083] Furthermore, it also includes a diaphragm 7 and a protective sheet 10, the diaphragm 7 is arranged on the surface of the upper cover plate 5, the diaphragm 7 is provided with a tearing portion 71 at the position corresponding to the discharge port 51, a serrated line 72 is provided between the tearing portion 71 and the diaphragm 7, the size of the protective sheet is larger than the size of the tearing portion 71, and the protective sheet 10 is arranged on the diaphragm 7 to close the tearing portion 71.

[0084] Adding protective sheets to improve the safety of storage tanks:

[0085] The protective sheet 10 is added to protect the tear portion 71 to prevent the items in the storage tank from shaking and piercing the tear portion 71 during transportation, thereby losing the sealing effect. It can also prevent people from intentionally piercing the tear portion 71 and stealing the food in the storage tank, thereby improving the safety of the storage tank.

[0086] The user takes the items from the storage tank:

[0087] The user first takes out the protection sheet 10 , and then the user can easily tear the tear portion 71 along the serrated line 72 to expose the discharge port 51 . The user can turn the storage tank upside down to pour the items in the storage tank out along the discharge port 51 , which is easy to operate.

[0088] Combination Figure 12 to Figure 14 As shown, the difference between Example 4 and Example 3 is that:

[0089] Another diaphragm 7 is replaced, the discharge port 51 of the upper cover plate 5 is cancelled, and discharge holes 8 are spaced apart on the upper cover plate 5 . The diaphragm 7 is arranged on the surface of the upper cover plate 5 . The diaphragm 7 is provided with a handle 9 for tearing the diaphragm 7 . The protective sheet 10 is arranged on the diaphragm 7 .

[0090] The user takes the items from the storage tank:

[0091] The user first takes out the protection sheet 10. When the user needs to take out the items in the storage tank, the user can pick up the handle 9 and pull it outward to easily peel off the membrane 7, thereby exposing the discharge hole 8. The user can invert the storage tank to pour the items in the storage tank out through the discharge hole 8. The operation is simple.

[0092] Adding a protective sheet 10 improves the safety of the storage tank:

[0093] A protective sheet 10 is added to protect the discharge hole 8 to prevent the items in the storage tank from shaking and piercing the discharge hole 8 during transportation, thereby losing the sealing effect. It can also prevent people from deliberately piercing the discharge hole 8 and stealing the food in the storage tank, thereby improving the safety of the storage tank.

[0094] Combination Figure 15 to Figure 18 As shown, the difference between Example 5 and Implementation 1 is:

[0095] The sealing cover 511 is cancelled at the discharge port 51, and a protective sheet 10 is further included. The protective sheet 10 has an opening 101, and the protective sheet 10 is rotatably arranged on the upper cover plate 5. When the opening 101 and the discharge port 51 are misaligned, the protective sheet 10 closes the discharge port 51, and when the opening 101 and the discharge port 51 are connected, the discharge port 51 is opened.

[0096] Furthermore, it also includes a diaphragm 7 , which is arranged on the protection sheet 10 to close the opening 101 .

[0097] Furthermore, the protection sheet 10 is also provided with a pushing portion or a notch 102 for facilitating the rotation of the protection sheet 10 .

[0098] The user takes the items from the storage tank:

[0099] The user first tears open the film 7. When the user needs to take out the items in the storage tank, the user inserts the fingernail into the notch 102 and pushes the protective sheet 7 to rotate, or directly pushes the protective sheet 7 to rotate. When the opening 101 and the discharge port 51 are connected, the discharge port 51 is opened. The user inverts the storage tank to pour the items in the storage tank along the discharge port 51 and the opening 101. The operation is simple.

[0100] The user closes the discharge port 51:

[0101] The user inserts the fingernail into the notch 102 and pushes the protective sheet 7 to rotate, or directly pushes the protective sheet 7 to rotate. When the opening 101 and the discharge port 51 are misaligned, the protective sheet 10 closes the discharge port 51, and the operation is simple.

Claims

1. A storage tank, comprising a tank body and a bottom plate, characterized in that: A lower retaining ring is provided at the lower end of the can body, the inner ring cavity of the lower retaining ring constitutes the lower opening of the can body, and the diameter of the lower opening is smaller than the inner cavity diameter of the can body; The diameter of the bottom plate is larger than the diameter of the lower opening. The bottom plate is placed in the inner cavity of the can body and abuts against the lower retaining ring. The bottom plate and the lower retaining ring are bonded, and the bottom plate closes the lower opening.

2. The storage tank according to claim 1, characterized in that: Glue is arranged between the bottom plate and the lower retaining ring, and the bottom plate and the lower retaining ring are bonded together by the glue.

3. The storage tank according to claim 1, characterized in that: The can body is a can body that penetrates from top to bottom and has elasticity, and the can body and the lower retaining ring are integrally formed.

4. The storage tank according to claim 1, characterized in that: The can body is made of paper, and the bottom plate is made of paper.

5. The storage tank according to any one of claims 1 to 4, characterized in that: It also includes an upper cover plate, an upper retaining ring is arranged at the upper end of the can body, the inner ring cavity of the upper retaining ring constitutes the upper opening of the can body, and the diameter of the upper opening is smaller than the inner cavity diameter of the can body; The diameter of the upper cover plate is larger than the diameter of the upper opening. The upper cover plate is placed in the inner cavity of the can body and abuts against the upper retaining ring. The upper cover plate and the upper retaining ring are bonded, and the upper cover plate closes the upper opening.

6. The storage tank according to claim 5, characterized in that: The can body and the upper retaining ring are integrally formed, and the upper cover plate is a paper upper cover plate.

7. The storage tank according to claim 5, characterized in that: Glue is provided between the upper cover plate and the upper retaining ring, and the upper cover plate and the upper retaining ring are bonded together by the glue.

8. The storage tank according to claim 5, characterized in that: The upper cover plate is provided with a discharge port.

9. The storage tank according to claim 5, characterized in that: The upper cover plate is provided with a discharge port, a sealing cover is arranged at the discharge port, the sealing cover is connected to the upper cover plate, and a sawtooth line is arranged at the connection between the sealing cover and the upper cover plate.

10. The storage tank according to claim 9, characterized in that: It also includes a protection sheet, which is arranged on the upper cover plate.

11. The storage tank according to claim 8, characterized in that: It also includes a diaphragm and a protective sheet, wherein the diaphragm is arranged on the surface of the upper cover plate, the diaphragm is provided with a tearing portion corresponding to the discharge port, a serrated line is provided between the tearing portion and the diaphragm, the size of the protective sheet is larger than the size of the tearing portion, and the protective sheet is arranged on the diaphragm to close the tearing portion.

12. The storage tank according to claim 5, characterized in that: The upper cover plate is spaced apart with discharge holes, and further comprises a membrane and a protective sheet. The membrane is arranged on the surface of the upper cover plate, the membrane is provided with a handle for tearing the membrane, and the protective sheet is arranged on the membrane.

13. The storage tank according to claim 5, characterized in that: It also includes a protection sheet, which has an opening and is rotatably arranged on the upper cover plate. When the opening and the discharge port are misaligned, the protection sheet closes the discharge port. When the opening and the discharge port are connected, the discharge port is opened.

14. The storage tank according to claim 13, characterized in that: It also includes a membrane, which is arranged on the protection sheet to close the opening.

15. The storage tank according to claim 13, characterized in that: The protection sheet is also provided with a pushing portion or a notch for facilitating the rotation of the protection sheet.

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