Liquid anhydride storage device

Abstract

The utility model provides a liquid anhydride storage device which comprises a barrel body, a barrel cover arranged at the upper end of the barrel body, a sealing assembly arranged at the lower end of the barrel cover, a lead screw arranged at the upper end of the barrel cover and capable of driving the sealing assembly to slide in the axial direction, and a plurality of fixing parts installed on the periphery of the barrel cover. One end of the fixing part abuts against the barrel body. According to the liquid anhydride storage device, the barrel body is used for storing liquid anhydride, the barrel cover is detachably installed on the barrel body, and the periphery of the sealing assembly is controlled by the lead screw to be connected to the periphery of the barrel body in a sealed mode, so that anhydride in the barrel body is isolated from external air, and water molecules in the external air are prevented from polluting anhydride; in addition, the storage device can be repeatedly used, and is good in sealing performance and low in use cost.

Description

Technical Field

[0001] The utility model belongs to the field of acid anhydride production, and particularly relates to a storage device for liquid acid anhydride. Background Art

[0002] An acid anhydride is the remaining part after a certain oxyacid loses one or several molecules of water. Generally, for an inorganic acid, one molecule of the acid directly loses one molecule of water to form the acid anhydride of the acid, and the valence of the element determining the acidity in the acid anhydride remains unchanged. For an organic acid, it is formed by the intermolecular dehydration reaction of two molecules or multiple molecules of the acid. Only oxyacids have acid anhydrides, and there is no acid anhydride for non-oxyacids.

[0003] An acid anhydride can generally be regarded as an oxide formed by dehydrating an acid. Many can react with water again to form the original acid. According to the properties of acids, it can be divided into: (1) Acid anhydrides of inorganic acids, formed by dehydration and condensation of one or two acid molecules. For example, carbonic anhydride is carbon dioxide, and nitric anhydride is dinitrogen pentoxide. (2) Acid anhydrides of organic acids, compounds formed by dehydration and condensation of two monobasic acid molecules or one dibasic acid molecule. Although they are not oxides, they are also called acid anhydrides. For example, acetic anhydride, phthalic anhydride, etc. Some acid anhydrides in the prior art will adsorb water in the air in the natural state and convert into the corresponding acid, which will affect the quality and specifications of the product. Summary of the Invention

[0004] In view of this, the utility model aims to provide a storage device for liquid acid anhydride to solve the problem that the existing acid anhydride storage device has insufficient sealing, resulting in acid anhydride absorbing water and affecting the product quality.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A storage device for liquid acid anhydride includes a barrel body, a barrel cover is arranged at the upper end of the barrel body, a sealing component is arranged at the lower end of the barrel cover, and the periphery of the sealing component can be hermetically connected to the inner edge of the upper end of the barrel body. A lead screw is arranged at the upper end of the barrel cover, and the lead screw can drive the sealing component to slide axially. A plurality of fixing parts are installed on the periphery of the barrel cover, and one end of each fixing part abuts against the barrel body.

[0007] Further, the sealing component includes a sealing gasket, and a support shaft is sleeved in the middle of the sealing gasket. Upper and lower support plates are respectively arranged on the periphery of the support shaft, and the upper and lower support plates respectively abut against both ends of the sealing gasket. A threaded hole is provided at the upper end of the support shaft, and the periphery of the lead screw is threadedly connected to the threaded hole.

[0008] Further, the sealing gasket is in a frustum structure, the outer diameter of the small end of the sealing gasket is smaller than the inner diameter of the upper end of the barrel body, and the outer diameter of the large end of the sealing gasket is larger than the inner diameter of the upper end of the barrel body.

[0009] Further, a sliding hole is provided on the barrel cover, the outer periphery of the support shaft is slidably connected into the sliding hole, a sliding groove is provided on the outer periphery of the support shaft, a boss is arranged in the sliding hole, and the outer periphery of the boss is slidably connected into the sliding groove.

[0010] Further, a shaft seat is arranged on the barrel cover, and the outer periphery of the lead screw is rotatably sleeved in the shaft seat.

[0011] Further, a communicating pipe is arranged on the barrel cover, and the upper support plate, the lower support plate and the sealing gasket are respectively slidably connected to the outer periphery of the communicating pipe. An air inlet pipe slides into the communicating pipe. One end of the air inlet pipe is provided with a baffle, the baffle is located inside the barrel body, and the upper end of the baffle abuts against the lower end of the communicating pipe.

[0012] Further, the upper end of the baffle is hermetically connected to the lower end of the communicating pipe through a first sealing ring. A spring is arranged on the outer periphery of the communicating pipe. Two ends of the spring are respectively fixedly connected to the upper end of the baffle and the lower end of the lower support plate. An air inlet is arranged on the side wall of the lower end of the air inlet pipe.

[0013] Further, an annular groove is provided on the side wall of the upper end of the barrel body, and a dehumidifying agent is arranged in the annular groove.

[0014] Further, the upper end of the barrel body is hermetically connected to the lower end of the barrel cover through a second sealing ring.

[0015] Further, the fixing part includes a pin shaft, the pin shaft is fixedly installed on the outer periphery of the barrel cover, the outer periphery of the pin shaft is rotatably sleeved with a movable plate, the cross section of the movable plate is a U-shaped structure, one end of the movable plate is provided with a bolt hole, a fixing bolt is threadedly connected in the bolt hole, a clamping ring platform is arranged on the outer periphery of the barrel body, an annular clamping groove is arranged at the lower end of the clamping ring platform, and one end of the fixing bolt can abut against the annular clamping groove.

[0016] Compared with the prior art, the storage device for liquid anhydride of the present utility model has the following beneficial effects:

[0017] (1) For the storage device for liquid anhydride of the present utility model, the barrel body is used to store liquid anhydride, the barrel cover can be detachably installed on the barrel body, and the outer periphery of the sealing component is hermetically connected to the outer periphery of the barrel body through the lead screw, so that the anhydride in the barrel body is isolated from the external air, preventing the water molecules in the external air from polluting the anhydride and preventing the anhydride from leaking out to cause environmental pollution. Moreover, the storage device can be reused, has good sealing performance and low use cost.

[0018] (2) For the storage device for liquid anhydride of the present utility model, the sealing gasket is in a frustum structure. When the sealing gasket is driven to move by the lead screw, the outer periphery of the large end of the sealing gasket gradually abuts against the inner edge of the barrel body. And the sealing gasket is made of hard rubber and has relatively small deformation. During implementation, in order to improve the connection strength between the sealing gasket and the support shaft, the sealing gasket is connected to the support shaft through the upper support plate and the lower support plate. Description of the Drawings

[0019] The accompanying drawings that form a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0020] Figure 1 is a schematic structural diagram of a storage device for a liquid anhydride according to an embodiment of the present utility model;

[0021] Figure 2 is a schematic cross-sectional diagram of a storage device for a liquid anhydride according to an embodiment of the present utility model;

[0022] Figure 3 is a schematic structural diagram of a sealing assembly according to an embodiment of the present utility model;

[0023] Figure 4 is a schematic cross-sectional diagram of a sealing assembly according to an embodiment of the present utility model;

[0024] Figure 5 is a schematic structural diagram of a communicating pipe according to an embodiment of the present utility model;

[0025] Figure 6 is a schematic structural diagram of an air inlet pipe according to an embodiment of the present utility model;

[0026] Figure 7 is a schematic structural diagram of a fixing part according to an embodiment of the present utility model.

[0027] Explanation of reference numerals:

[0028] 1 - barrel body; 11 - annular groove; 12 - clamping ring platform; 13 - annular clamping groove; 2 - barrel cover; 22 - lead screw; 23 - shaft seat; 3 - sealing assembly; 31 - sealing gasket; 32 - support shaft; 33 - upper support plate; 34 - lower support plate; 4 - communicating pipe; 41 - air inlet pipe; 42 - baffle; 43 - spring; 44 - air inlet; 5 - fixing part; 51 - pin shaft; 52 - movable plate; 53 - fixing bolt. Detailed implementation manners

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0032] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0033] As Figures 1-7 shown, a storage device for liquid anhydride includes a barrel body 1. A barrel cover 2 is provided at the upper end of the barrel body 1. A sealing assembly 3 is provided at the lower end of the barrel cover 2, and the periphery of the sealing assembly 3 can be sealingly connected to the inner edge of the upper end of the barrel body 1. A lead screw 22 is provided at the upper end of the barrel cover 2, and the lead screw 22 can drive the sealing assembly 3 to slide axially. A plurality of fixing parts 5 are installed on the periphery of the barrel cover 2, and one end of the fixing part 5 abuts against the barrel body 1. The barrel body 1 is used for storing liquid anhydride. The barrel cover 2 can be detachably installed on the barrel body 1. By controlling the periphery of the sealing assembly 3 to be sealingly connected to the periphery of the barrel body 1 through the lead screw 22, the anhydride in the barrel body 1 is isolated from the external air, preventing the water molecules in the external air from contaminating the anhydride and also preventing the anhydride from leaking out and causing environmental pollution. Moreover, this storage device can be reused, has good sealing performance and low use cost.

[0034] The sealing assembly 3 includes a sealing gasket 31, and a support shaft 32 is sleeved in the middle of the sealing gasket 31. An upper support plate 33 and a lower support plate 34 are respectively arranged on the periphery of the support shaft 32. The upper support plate 33 and the lower support plate 34 respectively abut against both ends of the sealing gasket 31. A threaded hole is provided at the upper end of the support shaft 32, and the periphery of the lead screw 22 is threadedly connected into the threaded hole. AsFigure 3 and Figure 4 As shown in Figure 4 , the gasket 31 is in the shape of a frustum of a cone. The outer diameter of the small end of the gasket 31 is smaller than the inner diameter of the upper end of the barrel body 1, and the outer diameter of the large end of the gasket 31 is larger than the inner diameter of the upper end of the barrel body 1. When the gasket 31 is driven to move by the lead screw 22, the outer periphery of the large end of the gasket 31 gradually abuts against the inner edge of the barrel body 1. And the gasket 31 used in this embodiment is made of hard rubber, with relatively small deformation. And in order to improve the connection strength between the gasket 31 and the support shaft 32, the gasket 31 is connected to the support shaft 32 through the upper support plate 33 and the lower support plate 34.

[0035] The barrel cover 2 is provided with a sliding hole. The outer periphery of the support shaft 32 is slidably connected into the sliding hole. And a sliding groove is provided on the outer periphery of the support shaft 32, and a boss is provided in the sliding hole. The outer periphery of the boss is slidably connected into the sliding groove. The cooperation between the boss and the sliding groove is to limit the sliding track of the support shaft 32 and prevent the support shaft 32 from rotating synchronously with the lead screw 22. And a shaft seat 23 is provided on the barrel cover 2, and the outer periphery of the lead screw 22 is rotatably sleeved into the shaft seat 23 to ensure that the lead screw 22 has no axial movement.

[0036] A connecting pipe 4 is provided on the barrel cover 2. And the upper support plate 33, the lower support plate 34 and the gasket 31 are respectively slidably connected to the outer periphery of the connecting pipe 4. An intake pipe 41 slides into the connecting pipe 4. One end of the intake pipe 41 is provided with a baffle 42. The baffle 42 is located inside the barrel body 1, and the upper end of the baffle 42 abuts against the lower end of the connecting pipe 4. After adding the acid anhydride and completing the sealing, in order to ensure that external gas does not leak into the barrel body 1, a protective gas is injected into the barrel body 1 through the intake pipe 41, and the protective gas does not react with the acid anhydride. In this embodiment, nitrogen is selected, so that the air pressure inside the barrel body 1 is positive relative to the outside of the barrel body 1 to ensure that there is no gas exchange inside the barrel body 1. And as Figure 5 and Figure 6 shown, the upper end of the baffle 42 is sealingly connected to the lower end of the connecting pipe 4 through a first sealing ring. And a spring 43 is provided on the outer periphery of the connecting pipe 4. The two ends of the spring 43 are respectively fixedly connected to the upper end of the baffle 42 and the lower end of the lower support plate 34. And an air inlet 44 is provided on the side wall of the lower end of the intake pipe 41.

[0037] An annular groove 11 is provided on the side wall of the upper end of the barrel body 1. A dehumidifying agent is provided in the annular groove 11. The dehumidifying agent is a prior art. The dehumidifying agent is used to eliminate the moisture in this part to ensure that water molecules do not enter the barrel body 1. And the upper end of the barrel body 1 is sealingly connected to the lower end of the barrel cover 2 through a second sealing ring to ensure the sealing of this part.

[0038] The fixing part 5 includes a pin shaft 51, and the pin shaft 51 is fixedly installed around the bucket lid 2. The movable plate 52 is rotatably sleeved around the pin shaft 51, and the cross-section of the movable plate 52 is a U-shaped structure. One end of the movable plate 52 is provided with a bolt hole, and a fixing bolt 53 is threadedly connected in the bolt hole. A clamping ring platform 12 is arranged around the bucket body 1, and an annular clamping groove 13 is arranged at the lower end of the clamping ring platform 12. One end of the fixing bolt 53 can abut against the annular clamping groove 13 to prevent the fixing bolt 53 from detaching from the contact with the clamping ring platform 12. And by the fixing bolt 53 abutting against the clamping ring platform 12, it can ensure that the bucket lid 2 and the bucket body 1 are firmly installed. When separating the bucket lid 2 from the bucket body 1, it is necessary to first separate the sealing assembly 3 from the bucket body 1 to prevent the bucket lid 2 from being difficult to disassemble and to prevent damage to the sealing gasket 31.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A storage device for liquid acid anhydride, characterized in that: The invention comprises a barrel body (1), a barrel cover (2) is arranged at the upper end of the barrel body (1), a sealing assembly (3) is arranged at the lower end of the barrel cover (2), and the periphery of the sealing assembly (3) can be sealingly connected to the inner edge of the upper end of the barrel body (1), and a screw rod (22) is arranged at the upper end of the barrel cover (2), and the screw rod (22) can drive the sealing assembly (3) to slide along the axial direction, and a plurality of fixing parts (5) are installed at the periphery of the barrel cover (2), and one end of the fixing part (5) is abutted against the barrel body (1).

2. A storage device for liquid acid anhydride according to claim 1, characterized in that: The sealing assembly (3) comprises a sealing gasket (31), and the middle part of the sealing gasket (31) is sleeved with a support shaft (32), an upper support plate (33) and a lower support plate (34) are respectively arranged on the periphery of the support shaft (32), the upper support plate (33) and the lower support plate (34) are respectively abutted against two ends of the sealing gasket (31), a threaded hole is arranged at the upper end of the support shaft (32), and the periphery of the screw rod (22) is threadedly connected to the threaded hole.

3. A storage device for liquid acid anhydride according to claim 2, characterized in that: The sealing gasket (31) is a truncated cone structure, the outer diameter of the small end of the sealing gasket (31) is smaller than the inner diameter of the upper end of the barrel body (1), and the outer diameter of the large end of the sealing gasket (31) is larger than the inner diameter of the upper end of the barrel body (1).

4. A storage device for liquid acid anhydride according to claim 2, characterized in that: The barrel cover (2) is provided with a sliding hole, the periphery of the support shaft (32) is slidably connected to the sliding hole, and the periphery of the support shaft (32) is provided with a sliding groove, a boss is provided in the sliding hole, and the periphery of the boss is slidably connected to the sliding groove.

5. The storage device for liquid acid anhydride according to claim 1, characterized in that: A shaft seat (23) is arranged on the barrel cover (2), and the outer periphery of the screw rod (22) is rotatably sleeved into the shaft seat (23).

6. The storage device for liquid acid anhydride according to claim 2, characterized in that: A connecting pipe (4) is arranged on the barrel cover (2), and an upper supporting plate (33), a lower supporting plate (34) and a sealing gasket (31) are respectively slidably connected to the periphery of the connecting pipe (4), an air intake pipe (41) is slid in the connecting pipe (4), a baffle (42) is installed at one end of the air intake pipe (41), the baffle (42) is located in the barrel body (1), and the upper end of the baffle (42) is abutted against the lower end of the connecting pipe (4).

7. A storage device for liquid acid anhydride according to claim 6, characterized in that: The upper end of the baffle (42) is sealed and connected to the lower end of the connecting pipe (4) through a first sealing ring, and a spring (43) is arranged on the periphery of the connecting pipe (4), and the two ends of the spring (43) are respectively fixedly connected to the upper end of the baffle (42) and the lower end of the lower support plate (34), and an air inlet (44) is arranged on the side wall of the lower end of the air inlet pipe (41).

8. The storage device for liquid acid anhydride according to claim 1, characterized in that: An annular groove (11) is provided on the upper side wall of the barrel body (1), and a dehumidifying agent is arranged in the annular groove (11).

9. The storage device for liquid acid anhydride according to claim 1, characterized in that: The upper end of the barrel body (1) is sealed and connected to the lower end of the barrel cover (2) via a second sealing ring.

10. The storage device for liquid acid anhydride according to claim 1, characterized in that: The fixing part (5) comprises a pin shaft (51), and the pin shaft (51) is fixedly installed on the outer periphery of the barrel cover (2), and the outer periphery of the pin shaft (51) is rotatably sleeved with a movable plate (52), and the cross section of the movable plate (52) is a U-shaped structure, and a bolt connection hole is provided at one end of the movable plate (52), and a fixing bolt (53) is threadedly connected in the bolt connection hole, and a clamping ring platform (12) is provided on the outer periphery of the barrel body (1), and an annular clamping groove (13) is provided at the lower end of the clamping ring platform (12), and one end of the fixing bolt (53) can be abutted against the annular clamping groove (13).

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