A chemical raw material storage tank

Abstract

The present invention relates to the technical field of storage devices, and particularly to a storage tank for chemical raw materials, which comprises a tank body. A support column is arranged on the outer wall of the bottom of the tank body. A fixed hopper is fixedly arranged inside the tank body through a fixed rod. A movable hopper is movably arranged in the fixed hopper. A communicating pipe is communicated with the top end of the movable hopper. A feeding pipe is fixedly arranged through the upper surface of the tank body, and the bottom end of the feeding pipe is located in the communicating pipe. A second discharging pipe is communicated with the bottom end of the fixed hopper, and the second discharging pipe penetrates through the bottom end of the tank body. Sealing covers are arranged at the ends of the first discharging pipe and the second discharging pipe. The present invention is convenient for adjusting the storage space in the tank according to the storage amounts of different chemical raw materials, is more flexible in use, and can effectively ensure that a dry storage environment can be maintained in the tank after feeding, and the use effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of storage devices, and particularly relates to a storage tank for chemical raw materials. Background Art

[0002] Chemical raw materials can generally be divided into two categories: organic chemical raw materials and inorganic chemical raw materials. During the production process of chemical raw materials in the production workshop, generally, non-corrosive granular chemical raw materials are stored through storage tanks.

[0003] Currently, there are still certain deficiencies in the existing storage tanks. When in use, a single storage tank can usually only store a single chemical raw material. Even if a partition bin is set in the storage tank, the separated storage space is fixed and cannot reasonably allocate the storage space according to the required storage amounts of different chemical raw materials. Moreover, when filling chemical raw materials, when the external environment is relatively humid, humid air is likely to enter the storage tank, resulting in the chemical raw materials being affected by moisture. Therefore, there is an urgent need to design a storage tank for chemical raw materials to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the defects existing in the prior art, and a storage tank for chemical raw materials is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A storage tank for chemical raw materials, including a tank body. A support column is provided on the outer wall of the bottom of the tank body. A fixed hopper is fixedly arranged inside the tank body through a fixed rod. A movable hopper is movably arranged in the fixed hopper. A connecting pipe is communicated at the top end of the movable hopper. A feeding pipe is fixedly arranged through the upper surface of the tank body, and the bottom end of the feeding pipe is located in the connecting pipe. A second discharging pipe is communicated at the bottom end of the fixed hopper, and the second discharging pipe penetrates through the bottom end of the tank body. Sealing covers are provided at the ends of the first discharging pipe and the second discharging pipe. Air holes are also opened on the outer side of the second discharging pipe. A feeding cylinder is fixedly arranged through the upper surface of the tank body, and further includes:

[0007] A closed ventilation mechanism, which is arranged on the upper surface of the tank body and is used for closing the feeding cylinder and replacing the air in the tank body with dry air;

[0008] A one-way sealing mechanism, which is arranged at the top end of the feeding pipe and is used for enabling the air in the tank body to be discharged only unidirectionally through the feeding pipe;

[0009] A telescopic mechanism, which is arranged in the movable hopper and is used for adjusting the lifting of the movable hopper.

[0010] As a further aspect of the present invention: The closed ventilation mechanism includes a second telescopic member disposed on the upper surface of the tank body. The telescopic end of the second telescopic member is provided with a lifting plate. The lifting plate is located directly above the feeding cylinder, and an air pump is provided on the upper surface of the lifting plate. The air guiding end of the air pump is provided with an air guiding pipe, and the air guiding pipe is located below the lifting plate. The air suction end of the air pump is provided with an air suction pipe, and a drying component is provided at the end of the air suction pipe. A connecting rod is further provided on the lower surface of the lifting plate, and a closing plate is provided at the bottom end of the connecting rod. A rubber ring is provided on the lower surface of the closing plate. A plugging component is further provided on the closing plate for closing the air guiding pipe when the air guiding pipe stops supplying air.

[0011] As a further aspect of the present invention: The drying component includes a drying box threadedly disposed at the end of the air suction pipe. The drying box is filled with a water-absorbing member, and a plurality of through holes are formed in the bottom outer wall of the drying box.

[0012] As a further aspect of the present invention: The plugging component includes a movable rod penetrating through the closing plate. A blocking piece is provided at the top end of the movable rod, and a first elastic member is sleeved on the outer side of the movable rod. A baffle is provided at the bottom end of the movable rod, and a rubber sheet is provided on the upper surface of the baffle.

[0013] As a further aspect of the present invention: The one-way closing mechanism includes a threaded cap threadedly disposed at the top end of the feeding pipe. A piston is connected to the inner wall of the top of the threaded cap through a second elastic member, and exhaust holes are further formed in the outer wall around the threaded cap.

[0014] As a further aspect of the present invention: The telescopic mechanism includes a first telescopic member disposed on the inner wall of the bottom of the fixed hopper. The telescopic end of the first telescopic member is connected to the inner wall of the top of the movable hopper, and a sleeve is further sleeved on the outer side of the first telescopic member. The top end of the sleeve is connected to the inner wall of the top of the movable hopper.

[0015] As a further aspect of the present invention: The first telescopic member, the second telescopic member and the air pump are all connected to a switch through wires, and the switch is electrically connected to a controller.

[0016] As a further aspect of the present invention: The bottom end of the support column is provided with a bottom plate, and universal wheels are provided on the lower surface of the bottom plate. A placement groove is formed on one side of the bottom plate.

[0017] As a further aspect of the present invention: An ear seat is provided on the outer wall of one side of the tank body, and a pin is movably penetrated through the upper surface of the ear seat. A connecting plate symmetric to the ear seat is provided on the outer wall of the other side of the tank body, and a jack matching with the pin is formed in the outer wall of the connecting plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] A chemical raw material storage tank provided by the present invention allows different chemical raw materials to be stored separately. The different chemical raw materials to be stored can be introduced through a feeding cylinder and a feeding pipe respectively. The chemical raw materials introduced through the feeding cylinder will directly enter the tank body, and the chemical raw materials introduced through the feeding pipe will enter the storage space formed between the movable hopper and the fixed hopper along the connecting pipe, effectively realizing the separate storage of different chemical raw materials. Moreover, the telescopic mechanism can drive the movable hopper to lift, so that the storage space formed between the movable hopper and the fixed hopper can be adjusted flexibly, facilitating the adjustment of the storage space in the tank according to the storage capacity of different chemical raw materials, making the use more flexible. When the chemical raw materials are filled and stored and the environmental humidity is high, dry air can be introduced into the tank through the closed ventilation mechanism. Then, the air in the tank first flows downward, then enters the second discharge pipe along the ventilation holes, and enters the storage space formed between the movable hopper and the fixed hopper, and finally is discharged from the top end of the feeding pipe. And the one-way closing mechanism located at the top end of the feeding pipe can effectively prevent external air from entering the storage space formed between the movable hopper and the fixed hopper through the feeding pipe, effectively ensuring that a dry storage environment can be maintained in the tank after feeding, and the use effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a front view structural schematic diagram of a chemical raw material storage tank provided by an embodiment of the present invention;

[0021] Figure 2 is a half-sectional structural schematic diagram of a chemical raw material storage tank provided by an embodiment of the present invention;

[0022] Figure 3 is an enlarged structural schematic diagram of a one-way closing mechanism of a chemical raw material storage tank provided by an embodiment of the present invention;

[0023] Figure 4 is a bottom view structural schematic diagram of a chemical raw material storage tank provided by an embodiment of the present invention;

[0024] Figure 5 is an enlarged structural schematic diagram of the movable hopper and the fixed hopper of a chemical raw material storage tank provided by an embodiment of the present invention;

[0025] Figure 6 is a top view structural schematic diagram of a chemical raw material storage tank provided by an embodiment of the present invention;

[0026] Figure 7 is an enlarged structural schematic diagram of a closed ventilation mechanism of a chemical raw material storage tank provided by an embodiment of the present invention;

[0027] Figure 8 is a bottom view structural schematic diagram of a closed ventilation mechanism of a chemical raw material storage tank provided by an embodiment of the present invention.

[0028] In the figure: 101 - tank body, 102 - support column, 103 - bottom plate, 104 - placement groove, 105 - universal wheel, 106 - feeding cylinder, 107 - fixing rod, 108 - movable hopper, 109 - fixed hopper, 110 - second discharge pipe, 111 - ventilation hole, 112 - first discharge pipe, 113 - connecting pipe, 114 - feeding pipe, 2 - telescopic mechanism, 201 - sleeve, 202 - first telescopic member, 3 - closed air exchange mechanism, 301 - second telescopic member, 302 - lifting plate, 303 - connecting rod, 304 - closing plate, 305 - rubber ring, 306 - air pump, 307 - air duct, 308 - exhaust duct, 309 - plugging assembly, 3091 - baffle plate, 3092 - rubber sheet, 3093 - movable rod, 3094 - first elastic member, 3095 - retaining piece, 310 - drying assembly, 3101 - drying box, 3102 - through hole, 4 - one-way closing mechanism, 401 - threaded cap, 402 - exhaust hole, 403 - piston, 404 - second elastic member, 501 - connecting plate, 502 - jack, 503 - bolt, 504 - ear seat. Detailed implementation mode

[0029] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] As Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 shown, a chemical raw material storage tank provided by an embodiment of the present invention includes a tank body 101. A support column 102 is provided on the outer wall of the bottom of the tank body 101. A fixed hopper 109 is fixedly arranged inside the tank body 101 through a fixing rod 107. A movable hopper 108 is movably arranged in the fixed hopper 109. A connecting pipe 113 is connected and arranged at the top end of the movable hopper 108. A feeding pipe 114 is fixedly arranged through the upper surface of the tank body 101, and the bottom end of the feeding pipe 114 is located in the connecting pipe 113. The bottom end of the fixed hopper 109 is connected and arranged with a second discharge pipe 110, and the second discharge pipe 110 penetrates through the bottom end of the tank body 101. Closing covers are arranged at the ends of both the first discharge pipe 112 and the second discharge pipe 110. Ventilation holes 111 are also opened on the outer side of the second discharge pipe 110. A feeding cylinder 106 is fixedly arranged through the upper surface of the tank body 101. It further includes:

[0031] A closed air exchange mechanism 3, which is arranged on the upper surface of the tank body 101 and is used to close the feeding cylinder 106 and replace the dry air into the tank body 101;

[0032] A one-way closing mechanism 4, which is arranged at the top end of the feeding pipe 114 and is used to enable the air in the tank body 101 to be discharged only unidirectionally through the feeding pipe 114;

[0033] The telescopic mechanism 2 is arranged in the movable hopper 108 and is used to adjust the lifting of the movable hopper 108.

[0034] Different chemical raw materials to be stored can be introduced respectively through the feeding cylinder 106 and the feeding pipe 114. The chemical raw materials introduced through the feeding cylinder 106 will directly enter the tank body 101. The chemical raw materials introduced through the feeding pipe 114 will enter the storage space formed between the movable hopper 108 and the fixed hopper 109 along the connecting pipe 113, effectively realizing the separate storage of different chemical raw materials. Moreover, the telescopic mechanism 2 can drive the movable hopper 108 to lift, so that the storage space formed between the movable hopper 108 and the fixed hopper 109 can be adjusted flexibly, facilitating the adjustment of the storage space in the tank body 101 according to the storage amount of different chemical raw materials, and making the use more flexible. When the chemical raw materials are filled and stored and the environmental humidity is relatively high, dry air can be introduced into the tank body 101 through the closed ventilation mechanism 3. Then, the air in the tank body 101 first flows downward, then enters the second discharge pipe 110 along the air permeation holes 111, and enters the storage space formed between the movable hopper 108 and the fixed hopper 109, and finally is discharged from the top end of the feeding pipe 114. And the one-way closing mechanism 4 located at the top end of the feeding pipe 114 can effectively prevent the outside air from entering the storage space formed between the movable hopper 108 and the fixed hopper 109 through the feeding pipe 114, effectively ensuring that a dry storage environment can be maintained in the tank body 101 after feeding, and the use effect is better.

[0035] As an embodiment of the present invention, please refer to Figure 1 、 Figure 7 and Figure 8, the closed ventilation mechanism 3 includes a second telescopic member 301 disposed on the upper surface of the tank body 101. The specific structure of the second telescopic member 301 is not limited. In this embodiment, preferably, the second telescopic member 301 is an electric telescopic rod. The telescopic end of the second telescopic member 301 is provided with a lifting plate 302. The lifting plate 302 is located directly above the feeding cylinder 106. And an air pump 306 is provided on the upper surface of the lifting plate 302. The air guiding end of the air pump 306 is provided with an air guiding pipe 307, and the air guiding pipe 307 is located below the lifting plate 302. The air extraction end of the air pump 306 is provided with an air extraction pipe 308, and a drying assembly 310 is provided at the end of the air extraction pipe 308. A connecting rod 303 is further provided on the lower surface of the lifting plate 302, and a closing plate 304 is provided at the bottom end of the connecting rod 303. A rubber ring 305 is provided on the lower surface of the closing plate 304. A blocking assembly 309 is further provided on the closing plate 304 for closing the air guiding pipe 307 when the air guiding pipe 307 stops supplying air. When it is necessary to block the feeding cylinder 106, the lifting plate 302 can be driven by the second telescopic member 301 to move downward, so that the rubber ring 305 at the bottom of the closing plate 304 fits with the top end of the feeding cylinder 106, which can play a role in closing the feeding cylinder 106. When it is necessary to replace the air in the tank body 101, the air dried by the drying assembly 310 can be introduced into the feeding cylinder 106 along the air guiding pipe 307 through the air pump 306, which is very convenient to use.

[0036] As an embodiment of the present invention, please refer to Figure 8 , the drying assembly 310 includes a drying box 3101 threadedly disposed at the end of the air extraction pipe 308. The drying box 3101 is filled with a water-absorbing member. The specific material of the water-absorbing member is not limited. In this embodiment, preferably, the water-absorbing member is a water-absorbing resin. And a plurality of through holes 3102 are formed in the outer wall of the bottom of the drying box 3101. Under the action of the air pump 306, when the outside air enters the drying box 3101 through the through holes 3102, the air can be dried by the water-absorbing member in the drying box 3101. When it is necessary to replace the water-absorbing member, the drying box 3101 can be directly rotated and removed, which is very convenient to use.

[0037] As an embodiment of the present invention, please refer to Figure 7 and Figure 8, the plugging assembly 309 includes a movable rod 3093 passing through the closing plate 304. A retaining piece 3095 is provided at the top end of the movable rod 3093, and a first elastic member 3094 is sleeved outside the movable rod 3093. The specific structure of the first elastic member 3094 is not limited. In this embodiment, preferably, the first elastic member 3094 is a spring. A baffle 3091 is provided at the bottom end of the movable rod 3093, and a rubber sheet 3092 is provided on the upper surface of the baffle 3091. When air is discharged through the air duct 307, the baffle 3091 can be pushed downward, so that air can smoothly enter the feeding cylinder 106. When the air pump 306 stops working, under the reset action of the first elastic member 3094, the baffle 3091 can re-plug the air duct 307, avoiding external air from entering the feeding cylinder 106 along the air duct 307 when replacing the drying assembly 310, and the use effect is better.

[0038] As an embodiment of the present invention, please refer to Figure 2 , Figure 3 and Figure 5 , the one-way closing mechanism 4 includes a threaded cover 401 threadedly provided at the top end of the feeding pipe 114. A piston 403 is connected to the inner wall of the top of the threaded cover 401 through a second elastic member 404. The specific structure of the second elastic member 404 is not limited. In this embodiment, preferably, the second elastic member 404 is a spring. Exhaust holes 402 are further provided on the outer wall around the threaded cover 401. When gas is discharged through the top end of the feeding pipe 114, the piston 403 can be pushed up, and the second elastic member 404 is compressed, so that air can be discharged along the exhaust holes 402. When the air pressure in the tank body 101 returns to balance, under the reset action of the second elastic member 404, the piston 403 can re-plug the exhaust holes 402, avoiding external air from being introduced into the storage space between the movable hopper 108 and the fixed hopper 109 through the top end of the feeding pipe 114, and the use effect is better.

[0039] As an embodiment of the present invention, please refer to Figure 2 , the telescopic mechanism 2 includes a first telescopic member 202 provided on the inner wall of the bottom of the fixed hopper 109. The specific structure of the first telescopic member 202 is not limited. In this embodiment, preferably, the first telescopic member 202 is an electric telescopic rod, and the telescopic end of the first telescopic member 202 is connected to the inner wall of the top of the movable hopper 108. A sleeve 201 is further sleeved outside the first telescopic member 202, and the top end of the sleeve 201 is connected to the inner wall of the top of the movable hopper 108. The movable hopper 108 can be driven to move up and down by the first telescopic member 202, so that the storage space between the movable hopper 108 and the fixed hopper 109 can be flexibly adjusted, and when the first telescopic member 202 expands and contracts, the sleeve 201 can play a protective role, effectively avoiding chemical raw materials from entering the expansion and contraction gap of the first telescopic member 202, and the use effect is better.

[0040] As an embodiment of the present invention, the first telescopic member 202, the second telescopic member 301 and the air pump 306 are all connected to switches through wires, and the switches are electrically connected to a controller. The specific structure of the controller is not limited. In this embodiment, preferably, the controller adopts a microprogram controller.

[0041] As an embodiment of the present invention, please refer to Figure 1 , a bottom plate 103 is provided at the bottom end of the support column 102, and universal wheels 105 are provided on the lower surface of the bottom plate 103. A placement groove 104 is formed on one side of the bottom plate 103. The universal wheels 105 can make the tank body 101 move flexibly, making it more convenient to use. When it is necessary to take chemical raw materials, the extraction bucket can be placed in the placement groove 104, and then the corresponding sealing cover is opened to collect the corresponding chemical raw materials, which is very convenient to use.

[0042] As an embodiment of the present invention, please refer to Figure 1 and Figure 4 , an ear seat 504 is provided on the outer wall of one side of the tank body 101, and a pin 503 is movably provided through the upper surface of the ear seat 504. A connecting plate 501 symmetrical to the ear seat 504 is provided on the outer wall of the other side of the tank body 101. A jack 502 matching the pin 503 is formed on the outer wall of the connecting plate 501. When it is necessary to continuously move multiple groups of tank bodies 101 in the production workshop, the connecting plate 501 on the tank body 101 can be inserted into the ear seat 504 of another group of tank bodies 101, and fixed by inserting the pin 503 into the jack 502, so that different tank bodies 101 are connected end to end, and are connected to the tank body 101 at the head end by means of a traction device. Under the traction of the traction device, all the tank bodies 101 can be moved as a whole, making it more convenient to use.

[0043] During use, different chemical raw materials to be stored can be introduced separately through the feeding cylinder 106 and the feeding pipe 114. The chemical raw materials introduced through the feeding cylinder 106 will directly enter the tank body 101, and the chemical raw materials introduced through the feeding pipe 114 will enter the storage space formed between the movable hopper 108 and the fixed hopper 109 along the connecting pipe 113, effectively realizing the separate storage of different chemical raw materials. Moreover, the telescopic mechanism 2 can drive the movable hopper 108 to lift, so that the storage space formed between the movable hopper 108 and the fixed hopper 109 can be adjusted flexibly, facilitating the adjustment of the storage space in the tank body 101 according to the storage capacity of different chemical raw materials, making the use more flexible. When the chemical raw materials are filled and stored and the environmental humidity is relatively high, dry air can be introduced into the tank body 101 through the closed ventilation mechanism 3. Then, the air in the tank body 101 first flows downward, then enters the second discharge pipe 110 along the air permeation holes 111, and enters the storage space formed between the movable hopper 108 and the fixed hopper 109, and finally is discharged from the top end of the feeding pipe 114. And the one-way closing mechanism 4 located at the top end of the feeding pipe 114 can effectively prevent the outside air from entering the storage space formed between the movable hopper 108 and the fixed hopper 109 through the feeding pipe 114, effectively ensuring that a dry storage environment can be maintained in the tank body 101 after feeding, and the use effect is better.

[0044] It should be specifically noted that although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A chemical raw material storage tank, comprising a tank body, characterized in that, A support column is provided on the outer wall of the bottom of the tank body. A fixed hopper is fixedly arranged inside the tank body through a fixed rod. A movable hopper is movably arranged in the fixed hopper. A storage space is formed between the fixed hopper and the movable hopper. A communicating pipe is connected and arranged at the top end of the movable hopper. A feeding pipe is fixedly arranged through the upper surface of the tank body, and the bottom end of the feeding pipe is located in the communicating pipe. A second discharge pipe is connected and arranged at the bottom end of the fixed hopper, and the second discharge pipe penetrates through the bottom end of the tank body. A first discharge pipe is connected and arranged at the bottom of the tank body. Sealing covers are arranged at the ends of the first discharge pipe and the second discharge pipe. Vent holes are also formed on the outer side of the second discharge pipe, and the vent holes communicate the storage space with the inside of the tank body. A feeding cylinder is fixedly arranged through the upper surface of the tank body. It further includes: A closed ventilation mechanism, which is arranged on the upper surface of the tank body and is used to seal the feeding cylinder and displace dry air into the tank body; A one-way sealing mechanism, which is arranged at the top end of the feeding pipe and is used to enable the air in the tank body to be discharged only unidirectionally through the feeding pipe; A telescopic mechanism, which is arranged in the movable hopper and is used to adjust the lifting of the movable hopper.

2. The chemical raw material storage tank according to claim 1, characterized in that, The closed ventilation mechanism includes a second telescopic member arranged on the upper surface of the tank body. The telescopic end of the second telescopic member is provided with a lifting plate. The lifting plate is located directly above the feeding cylinder, and an air pump is arranged on the upper surface of the lifting plate. The air guiding end of the air pump is provided with an air guiding pipe, and the air guiding pipe is located below the lifting plate. The air suction end of the air pump is provided with an air suction pipe, and a drying component is arranged at the end of the air suction pipe. A connecting rod is further arranged on the lower surface of the lifting plate, and the bottom end of the connecting rod is provided with a sealing plate. A rubber ring is arranged on the lower surface of the sealing plate. A blocking component is also arranged on the sealing plate and is used to seal the air guiding pipe when the air guiding pipe stops supplying air.

3. The chemical raw material storage tank according to claim 2, characterized in that, The drying component includes a drying box threadedly arranged at the end of the air suction pipe. An absorbent member is filled in the drying box, and a plurality of through holes are formed on the outer wall of the bottom of the drying box.

4. The chemical raw material storage tank according to claim 3, characterized in that, The blocking component includes a movable rod penetrating through the sealing plate. A blocking piece is arranged at the top end of the movable rod, and a first elastic member is sleeved on the outer side of the movable rod. A baffle is arranged at the bottom end of the movable rod, and a rubber sheet is arranged on the upper surface of the baffle.

5. A chemical raw material storage tank according to claim 2, characterized in that, The one-way sealing mechanism includes a threaded cover threadedly arranged at the top end of the feeding pipe. A piston is connected to the inner wall of the top of the threaded cover through a second elastic member. Exhaust holes are also formed on the outer wall around the threaded cover.

6. The chemical raw material storage tank according to claim 5, characterized in that, The telescopic mechanism includes a first telescopic member arranged on the inner wall of the bottom of the fixed hopper, and the telescopic end of the first telescopic member is connected to the inner wall of the top of the movable hopper. A sleeve is further sleeved on the outer side of the first telescopic member, and the top end of the sleeve is connected to the inner wall of the top of the movable hopper.

7. A chemical raw material storage tank according to claim 6, characterized in that, The first telescopic member, the second telescopic member and the air pump are all connected to a switch through wires, and the switch is electrically connected to a controller.

8. A chemical raw material storage tank according to claim 1, characterized in that, The bottom end of the support column is provided with a bottom plate, and universal wheels are arranged on the lower surface of the bottom plate. A placement groove is formed on one side of the bottom plate.

9. A chemical raw material storage tank according to claim 8, characterized in that, An ear seat is provided on one outer wall of the tank body, and a pin is movably arranged through the upper surface of the ear seat. A connecting plate symmetrical to the ear seat is provided on the other outer wall of the tank body, and a jack matching with the pin is opened on the outer wall of the connecting plate.

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