An esterification feeding convenient block blind and leakage collection integrated device and mounting structure thereof

Abstract

The utility model discloses an esterification convenient blanking blind plate and leakage collection integrated device and installation structure thereof, including feeding pipe, expansion joint, blind plate, receiving hopper and chain hoist, the feeding pipe includes upper and lower feeding pipe, the upper feeding pipe outside wall bottom is equipped with two or more than two upper lifting lugs, the expansion joint outside wall bottom is equipped with two or more than two lower lifting lugs, the receiving hopper is installed on the lower feeding pipe, and the receiving hopper bottom is equipped with the row although, the expansion joint top and the upper feeding pipe bottom are connected through the flange, the expansion joint bottom and the lower feeding pipe top are connected through the flange, the blind plate is located between the flange of the expansion joint low department and the lower feeding pipe top, the number of chain hoist is two or more than two, and the upper lifting lug and chain hoist number are equal with one to one correspondence, and the lower lifting lug is located just below the corresponding upper lifting lug, and the upper lifting hook and lower lifting hook of each chain hoist are respectively hooked on the corresponding upper and lower lifting lug. The above -mentioned device facilitates the blanking blind plate, improves the leakproofness, environmental protection and safety, and is simple and easy to transform.

Description

Technical Field

[0001] This utility model relates to an integrated device for convenient blind flange removal and leakage collection in esterification feeding and its installation structure, belonging to the field of powder pipeline feeding technology. Background Technology

[0002] "Pipeline feeding" is the process of feeding solid and liquid materials into pipelines and transporting them to reactors. Its core idea is to transport materials through a closed pipeline system. It has applications in many fields, such as: 1. Chemical and petrochemical industries: This is the most classic and widespread application of pipeline feeding. Purpose: To transport various solid raw materials (such as powders and granules), liquids, or slurries from one piece of equipment or storage tank to another reactor, mixing tank, or packaging line. 2. Pharmaceutical industry: An industry with extremely high requirements for hygiene and cross-contamination control. Purpose: To transport active pharmaceutical ingredients (APIs) and excipients between different processes (such as batching, mixing, granulation, tableting, and capsule filling). 3. Food industry: Similar to the pharmaceutical industry, with strict requirements for hygiene and safety. Purpose: To transport various food raw materials such as flour, sugar, milk powder, starch, and additives. 4. Water treatment and environmental protection: Purpose: To add chemicals required for wastewater treatment, such as flocculants (PAM), coagulants (PAC), lime powder, and activated carbon. Advantages: Precise and controllable dosage, safe operation, and environmentally friendly. 5. Plastics and Rubber Industry: Purpose: To transport plastic granules, powdered fillers (such as calcium carbonate), masterbatches, etc. in the production line. 6. Mining and Building Materials Industry: Purpose: To transport powdery materials such as cement, fly ash, and mineral powder.

[0003] The esterification reactor uses a pipeline feeding method to feed solid powder. Before feeding, the blind flange of the feed port needs to be removed, and after feeding, it needs to be restored. Currently, the following problems exist: 1. Due to the large size of the blind flange (DN450), the removal and plugging operation is difficult. 2. A sleeve structure is used above the blind flange. Due to gaps at the sleeve interface, anti-static bags need to be wrapped around it, which presents two problems: a) The anti-static bags are tied to the feed pipe with wire, which is not completely sealed, resulting in some leakage; b) Even with anti-static bags, there is still a certain safety risk that static electricity cannot be completely eliminated. 3. During the reaction, liquid material floating in the upper part of the reactor accumulates on the side of the blind flange facing inwards. During the removal and plugging operation, the accumulated material is carried out, causing long-term contamination from the feed port to the top of the reactor, failing to meet clean and civilized production standards. Summary of the Invention

[0004] This utility model provides an integrated device for convenient blind flange plugging and leakage collection, along with its installation structure, which facilitates blind flange plugging operations, simplifies the structure, improves sealing performance, and solves the pollution problem caused by accumulated material being carried out during blind flange plugging operations.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A convenient device for esterification feeding, including a blind flange and a leakage collection system, comprising a feeding pipe, an expansion joint, a blind flange, a receiving hopper, and a hand-operated hoist. The feeding pipe includes an upper feeding pipe and a lower feeding pipe; the bottom of the outer wall of the upper feeding pipe is provided with two or more upper lifting lugs evenly distributed around the perimeter; the bottom of the outer wall of the expansion joint is provided with two or more lower lifting lugs evenly distributed around the perimeter; the receiving hopper is an annular disc structure, the inner ring of the receiving hopper is sleeved around the lower feeding pipe and is seamlessly connected to the outer wall of the receiving hopper, and the bottom of the receiving hopper is provided with a discharge pipe (to discharge the material in the receiving hopper), and a control valve is provided on the discharge pipe; The upper feeding pipe, expansion joint, and lower feeding pipe are arranged sequentially from top to bottom; the top of the expansion joint and the bottom of the upper feeding pipe are connected by a flange; the bottom of the expansion joint and the top of the lower feeding pipe are connected by a flange; a blind flange is located between the bottom flange of the expansion joint and the top flange of the lower feeding pipe. There are two or more chain hoists. The number of upper and lower hanging lugs is equal to the number of chain hoists and they correspond one-to-one. The lower hanging lug is located directly below its corresponding upper hanging lug. The upper and lower hooks of each chain hoist are hooked onto their corresponding upper and lower hanging lugs, respectively.

[0006] As is common knowledge, a ring structure consists of an inner ring and an outer ring.

[0007] The aforementioned expansion joint provides a certain amount of flexibility in the height direction. It can retract upwards under the action of the hand chain hoist, thereby lifting the lower feeding pipe away from the blind flange to facilitate the removal of the blind flange. Alternatively, after the blind flange is removed, the hand chain hoist can be released to extend downwards, filling the gap left by the removal of the blind flange and ensuring the sealing of the feeding.

[0008] When using the device, if the blind flange needs to be removed, first remove the connecting bolts on the lower flange of the expansion joint and the top flange of the lower feeding pipe. Use a hand chain hoist to pull the lower feeding pipe upwards. As the expansion joint contracts, the lower feeding pipe is pulled upwards (just lift the lower feeding pipe away from the blind flange; there is no need for a large gap, the purpose is to facilitate the removal of the blind flange). Remove the blind flange, and the accumulated material brought out by removing the blind flange will be effectively collected by the receiving hopper. Then release the hand chain hoist and press the lower flange of the expansion joint down onto the top flange of the lower feeding pipe, and connect it with bolts. Then start feeding. After feeding is completed, repeat the above operation to reinstall the blind flange.

[0009] The above-mentioned synergistic combination of hand-operated hoists and expansion joints makes the removal and plugging of blind flanges easy and no longer difficult.

[0010] It should be noted that blind flanges are required for safety protection, process control, and equipment maintenance during esterification reactor reactions. As a "physical isolation barrier," the blind flange at the esterification reactor feed port, when not in use, blocks the path of hazardous materials leaking outwards and prevents external impurities from entering. During equipment maintenance, it provides absolute safety for repair work.

[0011] For ease of operation, handles are provided on the side wall of the blind flange.

[0012] To further reduce the safety risks caused by the incomplete elimination of static electricity, static electricity jumper wires are installed on each flange.

[0013] To facilitate operation and ensure balanced force distribution and economy, the bottom of the outer wall of the upper feeding pipe is provided with two symmetrically arranged upper lifting lugs; the bottom of the outer wall of the expansion joint is provided with two symmetrically arranged lower lifting lugs; and there are two hand chain hoists.

[0014] To facilitate the discharge of liquid accumulated in the hopper, the aforementioned esterification feeding convenient blind plate and leakage collection integrated device also includes a collection bucket and a connecting pipe. One end of the connecting pipe is connected to the drain pipe, and the other end is connected to the collection bucket.

[0015] To further improve structural stability, reinforcing screws are also included. The top of the outer wall of the expansion joint has two or more upper connecting rings evenly distributed around its perimeter, and the bottom of the outer wall of the expansion joint has two or more lower connecting rings evenly distributed around its perimeter. The number of reinforcing screws, upper connecting rings, and lower connecting rings are equal and correspond one-to-one. The reinforcing screws simultaneously pass through the corresponding upper and lower connecting rings and are fixed with nuts at least on the outer side of the upper and lower connecting rings. That is, nuts are threaded onto the reinforcing screws that pass through the upper and lower connecting rings, serving a fixing and limiting function. The outer side of the aforementioned upper and lower connecting rings refers to the side opposite to the upper and lower connecting rings. This provides support and reinforcement. The length of the expansion joint can be controlled by adjusting the position of the nuts on the screws.

[0016] To ensure the structural strength and corrosion resistance of the device, the feeding pipe, expansion joint, blind flange and receiving hopper are all made of stainless steel.

[0017] To further ensure structural strength and sealing, the inner ring of the receiving hopper is seamlessly welded to the outer wall of the receiving hopper.

[0018] The aforementioned device for convenient blind flange removal and leakage collection during esterification is installed on the feeding port of the esterification reactor. The bottom of the lower feeding pipe and the feeding port on the esterification reactor are connected by a flange.

[0019] Mounting flanges are provided at the bottom of the upper feeding pipe, both ends of the expansion joint, both ends of the lower feeding pipe, and the feeding port of the esterification reactor. During installation, adjacent upper and lower flanges are joined together and secured with bolts.

[0020] To reduce the impact of static electricity, static electricity jumpers are installed on each flange; the upper feed pipe, expansion joint, lower feed pipe and feed port on the esterification reactor are coaxially arranged, that is, the axes of the four coincide.

[0021] Any technologies not mentioned in this utility model are based on existing technologies.

[0022] This utility model relates to a convenient device for esterification feeding, blind flange removal and plugging, and leakage collection, along with its installation structure. It replaces the existing sleeve and anti-static bag structure with an expansion joint. The expansion joint is connected to the upper and lower feeding pipes via flanges, eliminating the leakage problem caused by the unsealed sleeve structure. The coordinated combination of a hand-operated hoist and the expansion joint makes blind flange removal and plugging operations easy and straightforward. The accumulated material brought out by the blind flange removal can be effectively collected by the receiving hopper, achieving clean and civilized production standards. Furthermore, the installation of static electricity jumpers on each flange reduces the safety risks associated with incomplete static electricity elimination. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the existing esterification feed structure; Figure 2 This is a schematic diagram of the structure of the integrated device for convenient esterification feeding, blind plate sealing, and leakage collection. In the diagram, 1 is the feeding pipe, 11 is the upper feeding pipe, 12 is the lower feeding pipe, 13 is the upper lifting lug, 2 is the expansion joint, 21 is the lower lifting lug, 3 is the blind flange, 4 is the receiving hopper, 5 is the discharge pipe, 6 is the esterification kettle, 61 is the feeding port, 62 is the stirring structure, and 7 is the sleeve and antistatic bag. Detailed Implementation

[0024] To better understand this utility model, the following embodiments further illustrate its content, but the content of this utility model is not limited to the following embodiments.

[0025] The directional terms used in this application, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," are based on the orientation or positional relationship shown in the accompanying drawings or in the usage state, and are only for the convenience of describing this application. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Example 1

[0026] like Figure 2 As shown, a convenient device for esterification feeding, including a blind flange and leakage collection system, comprises a feeding pipe, an expansion joint, a blind flange, a receiving hopper, and a hand-operated hoist; the hand-operated hoist is omitted in the figure.

[0027] The feeding pipe includes an upper feeding pipe and a lower feeding pipe; the bottom of the outer wall of the upper feeding pipe is provided with two or more upper lifting lugs evenly distributed around the perimeter; the bottom of the outer wall of the expansion joint is provided with two or more lower lifting lugs evenly distributed around the perimeter; the receiving hopper is an annular disc structure, the inner ring of the receiving hopper is sleeved around the lower feeding pipe and is seamlessly connected to the outer wall of the receiving hopper, and the bottom of the receiving hopper is provided with a discharge pipe (to discharge the material in the receiving hopper), and a control valve is provided on the discharge pipe; The upper feeding pipe, expansion joint, and lower feeding pipe are arranged sequentially from top to bottom; the top of the expansion joint and the bottom of the upper feeding pipe are connected by a flange; the bottom of the expansion joint and the top of the lower feeding pipe are connected by a flange; a blind flange is located between the bottom flange of the expansion joint and the top flange of the lower feeding pipe. There are two or more chain hoists. The number of upper and lower hanging lugs is equal to the number of chain hoists and they correspond one-to-one. The lower hanging lug is located directly below its corresponding upper hanging lug. The upper and lower hooks of each chain hoist are hooked onto their corresponding upper and lower hanging lugs, respectively.

[0028] The aforementioned expansion joint provides a certain amount of flexibility in the height direction. It can retract upwards under the action of the hand chain hoist, thereby lifting the lower feeding pipe away from the blind flange to facilitate the removal of the blind flange. Alternatively, after the blind flange is removed, the hand chain hoist can be released to extend downwards, filling the gap left by the removal of the blind flange and ensuring the sealing of the feeding.

[0029] When using the device, if the blind flange needs to be removed, first remove the connecting bolts on the lower flange of the expansion joint and the top flange of the lower feeding pipe. Use a hand chain hoist to pull the lower feeding pipe upwards. As the expansion joint contracts, the lower feeding pipe will be pulled upwards (just enough to lift the lower feeding pipe away from the blind flange; no large gap is needed, the purpose is to facilitate the removal of the blind flange). Remove the blind flange, and the accumulated material brought out by removing the blind flange will be effectively collected by the receiving hopper. Then release the hand chain hoist and press the lower flange of the expansion joint down onto the top flange of the lower feeding pipe, and connect it with bolts. Then start feeding. After feeding is completed, remove the connecting bolts on the lower flange of the expansion joint and the top flange of the lower feeding pipe. Use a hand chain hoist to pull the lower feeding pipe upwards. As the expansion joint contracts, the lower feeding pipe will be pulled upwards (just enough to reinstall the blind flange; no large gap is needed, the purpose is to facilitate the reinstallation of the blind flange). Reinstall the blind flange between the lower flange of the expansion joint and the top flange of the lower feed pipe, and connect the lower flange of the expansion joint and the top flange of the lower feed pipe using bolts. This coordinated combination of the hand-operated hoist and the expansion joint makes the blind flange removal and plugging operation easy and no longer difficult. Example 2

[0030] Based on Example 1, the following improvements were made: Handles were provided on the sidewalls of the blind flange for ease of operation. Static electricity jumper wires were installed on each flange to further reduce safety risks caused by incomplete elimination of static electricity. Example 3

[0031] Based on Example 2, the following improvements were made: To facilitate operation and ensure the balance of force, two symmetrically arranged upper lifting lugs are provided at the bottom of the outer wall of the upper feeding pipe; two symmetrically arranged lower lifting lugs are provided at the bottom of the outer wall of the expansion joint; and the number of hand-operated hoists is two. Example 4

[0032] Based on Example 3, the following improvements were made: In order to facilitate the discharge of liquid accumulated in the hopper, the above-mentioned esterification feeding convenient blind plate and leakage collection integrated device also includes a collection bucket and a connecting pipe. One end of the connecting pipe is connected to the drain pipe and the other end is connected to the collection bucket. Example 5

[0033] Based on Embodiment 4, the following improvements were made: To further enhance the stability of the structure, a reinforcing screw was also included. Two upper connecting rings are evenly distributed around the periphery at the top of the outer wall of the expansion joint, and two lower connecting rings are evenly distributed around the periphery at the bottom of the outer wall of the expansion joint. The number of reinforcing screws, upper connecting rings, and lower connecting rings are equal and correspond one-to-one. The reinforcing screw passes through the corresponding upper and lower connecting rings simultaneously and is fixed with a nut at least on the outer side of the upper and lower connecting rings. The outer side of the aforementioned upper and lower connecting rings refers to the side opposite to the upper and lower connecting rings. This provides support and reinforcement. The length of the expansion joint can be controlled by adjusting the position of the nut on the screw. Example 6

[0034] Based on Embodiment 4 or 5, the following improvements were made: To ensure the structural strength and corrosion resistance of the device, the feeding pipe, expansion joint, blind flange, and receiving hopper are all made of stainless steel. To further ensure structural strength and sealing, the inner ring of the receiving hopper is seamlessly welded to the outer wall of the receiving hopper.

[0035] like Figure 2 As shown, the aforementioned integrated device for convenient blind flange sealing and leakage collection in esterification is installed on the feeding port of the esterification reactor. The bottom of the lower feeding pipe and the feeding port on the esterification reactor are connected by a flange. The esterification reactor is equipped with a stirring structure. To reduce the influence of static electricity, static electricity jumper wires are installed on each flange; the upper feeding pipe, expansion joint, lower feeding pipe, and feeding port on the esterification reactor are coaxially arranged, that is, the axes of the four coincide.

[0036] Experimental verification has shown that the above-mentioned integrated device for convenient blind flange removal and plugging and leakage collection, along with its installation structure, eliminates the leakage problem caused by the non-sealing of the sleeve structure by replacing the existing sleeve and anti-static bag structure with an expansion joint. The expansion joint is connected to the upper and lower feeding pipes by flanges. The coordinated combination of the hand-operated hoist and the expansion joint makes the blind flange removal and plugging operation easy and no longer difficult. The accumulated material brought out by the blind flange removal can be effectively collected by the receiving hopper, achieving clean and civilized production standards. Furthermore, the installation of static electricity jumpers on each flange reduces the safety risks of not being able to completely eliminate static electricity.

Claims

1. A device for convenient esterification feeding, blind flange plugging, and leakage collection, characterized in that: Includes feeding pipe (1), expansion joint (2), blind flange (3), receiving hopper (4) and hand chain hoist; The feeding pipe (1) includes an upper feeding pipe (11) and a lower feeding pipe (12); the bottom of the outer wall of the upper feeding pipe (11) is provided with two or more upper lifting lugs (13) evenly distributed around the perimeter; the bottom of the outer wall of the expansion joint (2) is provided with two or more lower lifting lugs (21) evenly distributed around the perimeter; the receiving hopper (4) is an annular disc structure, the inner ring of the receiving hopper (4) is sleeved around the lower feeding pipe (12) and is seamlessly connected to the outer wall of the receiving hopper (4), and the bottom of the receiving hopper (4) is provided with a drain pipe (5), and a control valve is provided on the drain pipe (5); The upper feeding pipe (11), expansion joint (2) and lower feeding pipe (12) are arranged sequentially from top to bottom; the top of the expansion joint (2) and the bottom of the upper feeding pipe (11) are connected by a flange; the bottom of the expansion joint (2) and the top of the lower feeding pipe (12) are connected by a flange; the blind plate (3) is located between the bottom flange of the expansion joint (2) and the top flange of the lower feeding pipe (12); There are two or more chain hoists. The number of upper hanging ears (13) and lower hanging ears (21) is equal to the number of chain hoists and they correspond one-to-one. The lower hanging ear (21) is located directly below the upper hanging ear (13) corresponding to it. The upper and lower hooks of each chain hoist are hooked on the upper hanging ear (13) and lower hanging ear (21) corresponding to it, respectively.

2. The integrated device for convenient esterification feeding, blind plate plugging, and leakage collection according to claim 1, characterized in that: Handles are provided on the side wall of the blind plate (3).

3. The esterification feeding convenient blind plate plugging and leakage collection integrated device according to claim 1 or 2, characterized in that: Each flange is equipped with an electrostatic jumper.

4. The integrated device for convenient esterification feeding, blind flange removal, and leakage collection according to claim 1 or 2, characterized in that: The bottom of the outer wall of the upper feeding pipe (11) is provided with two symmetrically arranged upper lifting lugs (13); the bottom of the outer wall of the expansion joint (2) is provided with two symmetrically arranged lower lifting lugs (21); the number of hand chain hoists is two.

5. The integrated device for convenient esterification feeding, blind flange removal, and leakage collection according to claim 1 or 2, characterized in that: It also includes a collection bucket and a connecting pipe, one end of which is connected to the drain pipe (5) and the other end is connected to the collection bucket.

6. The integrated device for convenient esterification feeding, blind flange removal, and leakage collection according to claim 1 or 2, characterized in that: It also includes a reinforcing screw, and the top of the outer wall of the expansion joint (2) is provided with two or more upper connecting rings evenly distributed around the periphery, and the bottom of the outer wall of the expansion joint (2) is provided with two or more lower connecting rings evenly distributed around the periphery; the number of reinforcing screws, upper connecting rings and lower connecting rings are equal and correspond one to one, and the reinforcing screws pass through the corresponding upper connecting rings and lower connecting rings at the same time, and are fixed with nuts at least on the outside of the upper connecting rings and lower connecting rings.

7. The integrated device for convenient esterification feeding, blind flange removal, and leakage collection according to claim 1 or 2, characterized in that: The feeding pipe (1), expansion joint (2), blind flange (3) and receiving hopper (4) are all made of stainless steel.

8. The integrated device for convenient esterification feeding, blind plate plugging, and leakage collection according to claim 1 or 2, characterized in that: The inner ring of the receiving hopper (4) is seamlessly welded to the outer wall of the receiving hopper (4).

9. An installation structure for the integrated device for convenient esterification feeding, blind flange sealing, and leakage collection as described in any one of claims 1-8, characterized in that: The feeding port (61) installed on the esterification reactor (6) is characterized in that the bottom of the lower feeding pipe (12) and the feeding port (61) on the esterification reactor (6) are connected by a flange.

10. The mounting structure according to claim 9, characterized in that: Static jumper wires are installed on each flange; the feed inlet (61) on the upper feed pipe (11), expansion joint (2), lower feed pipe (12) and esterification reactor (6) are coaxially arranged.

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