A sealed feeding structure for a rectifying column

Abstract

The utility model discloses a sealed feeding structure for rectifying column relates to rectifying column technical field, the feeding process is not sealed to the inside of feeding pipe in view of the background art, is easy to cause the gas overflow in the tower, and the practicability is low problem, the following scheme is proposed, including the shell of the flow valve installation on the outer wall of rectifying column feeding end, and the shell includes the storage container, the sealing cover of hinge connection on the outer wall on the top end of storage container and the feeding pipe of flange connection on the outer wall on the bottom end of storage container, is equipped with lifting assembly in the shell, and the lifting assembly includes the upper connecting ear of bolt connection on the outer wall on the bottom center of sealing cover, the connecting rod of hinge connection on the inner wall on the lower part of upper connecting ear, the lower connecting ear of hinge connection on the outer wall on the lower part of connecting rod and the lifting rod of bolt connection on the outer wall on the bottom of lower connecting ear. The utility model discloses can realize the overall sealing when feeding, prevent the gas overflow in the tower when feeding, and the practicability is improved.

Description

Technical Field

[0001] This utility model relates to the field of distillation column technology, and in particular to a sealed feeding structure for distillation columns. Background Technology

[0002] A distillation column is a tower-type gas-liquid contact device used for distillation. It utilizes the property that the components in a mixture have different volatility, i.e., different vapor pressures at the same temperature, to transfer lighter components (low-boiling substances) from the liquid phase to the gas phase, while heavier components (high-boiling substances) from the gas phase are transferred to the liquid phase, thus achieving separation. During the operation of the distillation column, the liquid material needs to be fed in a sealed manner to prevent gas from overflowing from the column during the feeding process.

[0003] A search revealed a Chinese patent (application number "202320959029.7") disclosing "a distillation column with convenient loading and unloading." This distillation column includes a main body, with a reflux pipe and an inlet pipe on the right outer surface, a feed pipe on the left outer surface, a top cover at the top, an exhaust pipe on the upper outer surface of the top cover, a U-shaped fixing frame on the upper outer surface of the top cover, and a motor on the upper outer surface of the U-shaped fixing frame. The output end of the motor has a threaded rod. However, in use, this distillation column only loads liquid materials through the feed pipe, without sealing the inside of the feed pipe during loading, which easily causes gas to overflow from the column, resulting in low practicality. Utility Model Content

[0004] This utility model provides a sealed feeding structure for a distillation column, which solves the problem mentioned in the prior art that the feed pipe of the distillation column is not sealed during the feeding process, which easily causes gas to overflow from the column and results in low practicality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sealed feeding structure for a distillation column includes a housing mounted on the outer wall of the feed end of the distillation column via a flow valve. The housing includes a storage cylinder, a sealing cover hinged to the top outer wall of the storage cylinder, and a feeding pipe connected to the bottom outer wall of the storage cylinder via a flange. A lifting assembly is provided inside the housing. The lifting assembly includes an upper connecting lug bolted to the outer wall at the center of the bottom of the sealing cover, a connecting rod hinged to the lower inner wall of the upper connecting lug, a lower connecting lug hinged to the lower outer wall of the connecting rod, and a lifting rod bolted to the bottom outer wall of the lower connecting lug. A leakage plate is welded to the lower inner wall of the storage cylinder, a retaining ring is welded to the middle inner wall of the feeding pipe, and a piston is provided inside the feeding pipe, with a spring at the bottom of the piston.

[0007] Preferably, mounting grooves are provided on the outer walls of the flange at the bottom of the storage cylinder and the flange at the top of the feeding pipe, and a sealing ring is provided between the storage cylinder and the feeding pipe, with the sealing ring respectively embedded in the two mounting grooves.

[0008] Preferably, the lower outer wall of the lifting rod has external threads, and a limit ring is screwed onto the lower outer wall of the lifting rod.

[0009] Preferably, a through hole is formed on the outer wall at the center of the material leakage plate, and the upper part of the lifting rod is slidably installed in the through hole.

[0010] Preferably, the top and bottom outer walls of the retaining ring are provided with conical guide surfaces, and the outer wall of the conical guide surface at the bottom of the retaining ring is provided with a fixing groove, in which an upper sealing ring is embedded.

[0011] Preferably, the piston has conical sealing surfaces on its top and bottom outer walls, and a groove is formed on the outer wall of the conical sealing surface at the top of the piston. A lower sealing ring is embedded in the groove. The piston is slidably mounted on the lower outer wall of the lifting rod, and a limiting groove is formed on the outer wall at the bottom of the piston. The upper part of the spring is sleeved in the limiting groove, and the lower part of the spring abuts against the inner wall of the feeding pipe.

[0012] With the above scheme, opening the sealing cover causes the upper connecting lug to rotate along the hinge axis, which in turn drives the connecting rod to pull the lifting rod upward. The lifting rod then drives the limiting ring upward, and under the action of the limiting ring and spring tension, the piston rises. The upper conical sealing surface of the piston contacts the lower conical guide surface of the retaining ring, sealing the piston and retaining ring under the action of the upper and lower sealing rings to prevent gas from overflowing from the tower during material feeding. After the material feeding is completed, the sealing cover is closed, and the connecting rod causes the lifting rod and limiting ring to descend. At this time, the lifting rod drives the piston downward while simultaneously squeezing the spring. After the piston disengages from the retaining ring, the material enters the flow valve.

[0013] The beneficial effects of this utility model are as follows:

[0014] By opening the sealing cover, the lifting rod and piston move, allowing the piston to contact the retaining ring. The upper conical sealing surface of the piston contacts the lower conical guide surface of the retaining ring. Under the action of the upper and lower sealing rings, the piston and retaining ring are sealed, preventing gas from overflowing from the tower during feeding. When the sealing cover is closed, the piston and retaining ring are separated, enabling quick overall sealing during feeding and preventing gas from overflowing from the tower, thus improving practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall main structure of a sealed feeding structure for a distillation column proposed in this utility model.

[0016] Figure 2This is a schematic cross-sectional view of the overall structure of a sealed feeding structure for a distillation column proposed in this utility model.

[0017] Figure 3 The present utility model proposes Figure 2 Enlarged structural diagram at point A in the middle.

[0018] Figure 4 This is a schematic cross-sectional view of the shell portion of a sealed feeding structure for a distillation column proposed in this utility model.

[0019] Figure 5 This is a schematic diagram of the main structure of the lifting assembly of a sealed feeding structure for a distillation column proposed in this utility model.

[0020] Figure 6 This is a schematic cross-sectional view of the retaining ring portion of a sealed feeding structure for a distillation column proposed in this utility model.

[0021] Figure 7 The present utility model proposes Figure 6 Enlarged structural diagram at point B.

[0022] Figure 8 This is a schematic cross-sectional view of the piston portion of a sealed feeding structure for a distillation column proposed in this utility model.

[0023] In the diagram: 1. Shell; 101. Storage cylinder; 102. Sealing cover; 103. Feeding pipe; 2. Lifting assembly; 201. Upper connecting ear; 202. Connecting rod; 203. Lower connecting ear; 204. Lifting rod; 205. Limiting ring; 3. Discharge plate; 4. Retaining ring; 41. Upper sealing ring; 5. Piston; 51. Lower sealing ring; 6. Spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1, referring to Figure 1-2 and Figure 4A sealed feeding structure for a distillation column includes a housing 1 installed on the outer wall of the feed end of the distillation column via a flow valve. The housing 1 includes a storage cylinder 101, a sealing cover 102 connected to the outer wall of the top end of the storage cylinder 101 via a hinge, and a feeding pipe 103 connected to the outer wall of the bottom end of the storage cylinder 101 via a flange. The flange at the bottom end of the storage cylinder 101 and the flange at the top end of the feeding pipe 103 both have mounting grooves on their outer walls. A sealing ring is provided between the storage cylinder 101 and the feeding pipe 103, and the sealing ring is respectively embedded in the two mounting grooves. The sealing cover 102 and the storage cylinder 101 adopt common sealing methods (such as sealing rings) and fixing methods (such as magnetic fixing or bolt fixing) in the prior art.

[0026] Example 2, refer to Figure 3 and Figure 5-8 A sealed feeding structure for a distillation column further includes a lifting assembly 2. The lifting assembly 2 includes an upper connecting lug 201 bolted to the outer wall of the bottom center of the sealing cover 102, a connecting rod 202 hinged to the lower inner wall of the upper connecting lug 201, a lower connecting lug 203 hinged to the lower outer wall of the connecting rod 202, and a lifting rod 204 bolted to the bottom outer wall of the lower connecting lug 203. The lifting rod 204 is divided into a lifting section, an installation section, and a threaded section, with the outer diameters of the lifting section, installation section, and threaded section decreasing sequentially, forming a stepped shape. External threads are formed on the lower outer wall of the lifting rod 204, and a limit ring 205 is screwed onto the lower outer wall of the lifting rod 204. A material leakage plate 3 is welded to the lower inner wall of the storage cylinder 101. A through hole is opened on the outer wall of the core. The upper part of the lifting rod 204 is slidably installed in the through hole. A retaining ring 4 is welded on the inner wall of the middle part of the feeding pipe 103. A conical guide surface is opened on the outer wall of the top and bottom of the retaining ring 4. A fixing groove is opened on the outer wall of the conical guide surface at the bottom of the retaining ring 4. An upper sealing ring 41 is embedded in the fixing groove. A piston 5 is provided in the feeding pipe 103. A conical sealing surface is opened on the outer wall of the top and bottom of the piston 5. A groove is opened on the outer wall of the upper conical sealing surface of the piston 5. A lower sealing ring 51 is embedded in the groove. The piston 5 is slidably installed on the lower outer wall of the lifting rod 204. A spring 6 is provided at the bottom of the piston 5. A limit groove is opened on the outer wall of the bottom of the piston 5. The upper part of the spring 6 is sleeved in the limit groove, and the lower part of the spring 6 abuts against the inner wall of the feeding pipe 103.

[0027] Working principle: When the sealing cover 102 is opened, the sealing cover 102 causes the upper connecting ear 201 to rotate along the hinge axis, which in turn causes the connecting rod 202 to pull the lifting rod 204 upward. The lifting rod 204 causes the limiting ring 205 to rise. Under the tension of the limiting ring 205 and the spring 6, the piston 5 rises. The upper conical sealing surface of the piston 5 contacts the lower conical guide surface of the retaining ring 4. Under the action of the upper sealing ring 41 and the lower sealing ring 51, the piston 5 and the retaining ring 4 are sealed to prevent gas from overflowing from the tower during material feeding. After the material feeding is completed, the sealing cover 102 is closed. The connecting rod 202 causes the lifting rod 204 and the limiting ring 205 to descend. The lower part of the lifting section of the lifting rod 204 squeezes the piston 5, which in turn causes the piston 5 to descend and squeezes the spring 6. After the piston 5 disengages from the retaining ring 4, the material enters the flow valve.

[0028] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A sealed feeding structure for a distillation column, comprising a housing (1) installed on the outer wall of the feed end of the distillation column via a flow valve, characterized in that, The housing (1) includes a storage cylinder (101), a sealing cap (102) connected to the outer wall of the top of the storage cylinder (101) by a hinge, and a feeding pipe (103) connected to the outer wall of the bottom of the storage cylinder (101) by a flange; The housing (1) is provided with a lifting assembly (2), which includes an upper connecting lug (201) bolted to the outer wall of the bottom center of the sealing cover (102), a connecting rod (202) hinged to the lower inner wall of the upper connecting lug (201), a lower connecting lug (203) hinged to the lower outer wall of the connecting rod (202), and a lifting rod (204) bolted to the bottom outer wall of the lower connecting lug (203). A material leakage plate (3) is welded to the lower inner wall of the storage cylinder (101); A retaining ring (4) is welded to the inner wall of the middle part of the feeding pipe (103); The feed tube (103) is equipped with a piston (5), and the bottom of the piston (5) is equipped with a spring (6).

2. The sealed feeding structure for a distillation column according to claim 1, characterized in that, The flange at the bottom of the storage cylinder (101) and the flange at the top of the feeding pipe (103) are both provided with mounting grooves. A sealing ring is provided between the storage cylinder (101) and the feeding pipe (103), and the sealing ring is respectively embedded in the two mounting grooves.

3. The sealed feeding structure for a distillation column according to claim 1, characterized in that, The lower outer wall of the lifting rod (204) has an external thread, and a limit ring (205) is screwed onto the lower outer wall of the lifting rod (204).

4. The sealed feeding structure for a distillation column according to claim 1, characterized in that, The material leakage plate (3) has a through hole on its outer wall at the center, and the upper part of the lifting rod (204) is slidably installed in the through hole.

5. The sealed feeding structure for a distillation column according to claim 1, characterized in that, The top and bottom outer walls of the retaining ring (4) are provided with conical guide surfaces, and the outer wall of the conical guide surface at the bottom of the retaining ring (4) is provided with a fixing groove, and the upper sealing ring (41) is embedded in the fixing groove.

6. The sealed feeding structure for a distillation column according to claim 1, characterized in that, The piston (5) has conical sealing surfaces on its top and bottom outer walls, and a groove is provided on the outer wall of the conical sealing surface at the top of the piston (5). A lower sealing ring (51) is embedded in the groove. The piston (5) is slidably mounted on the lower outer wall of the lifting rod (204), and a limiting groove is provided on the bottom outer wall of the piston (5). The upper part of the spring (6) is sleeved in the limiting groove, and the lower part of the spring (6) abuts against the inner wall of the feeding pipe (103).

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