A seal assembly for a glycol methylether recovery unit

Abstract

The utility model provides a kind of sealing assembly for ethylene glycol methyl ether recovery device, including the tubular interface of being fixed to recovery device, interface contains inner tube and conical guide chamfer, end face seal of interface bottom, sealing cover and multiple section telescopic rod of being sleeved in the outer thread of interface are penetrated, telescopic rod is connected by the front rod of rotatable connection sealing plate, rear rod with threaded driving portion is connected by convex ridge-groove structure, its joint part nests elastic sealing assembly, sealing cover rotation can compress end face seal, threaded driving portion rotation can make telescopic rod axial displacement, realize sealing plate and inner tube conical surface sealing and flow passage sealing.This sealing assembly is reliable in sealing, adjustable, easy to install and maintain, can adapt to a variety of working conditions, ensure that ethylene glycol methyl ether recovery device safe and efficient operation.

Description

Technical Field

[0001] This utility model relates to the technical field, and more specifically, to a sealing component for an ethylene glycol methyl ether recovery device. Background Technology

[0002] Ethylene glycol methyl ether (EDGME) is a commonly used organic solvent in chemical production processes, and its recycling and reuse are of great significance for reducing production costs and environmental pollution. However, EEGME is volatile and has a certain degree of toxicity. In recycling units, if sealing measures are not in place, leaks can easily occur, which not only wastes resources but may also cause serious harm to the health of operators and the surrounding environment.

[0003] Currently, existing ethylene glycol methyl ether (EDGME) recovery units suffer from numerous sealing problems. Some traditional sealing structures are simple in design and ineffective. For example, some recovery units use ordinary rubber gaskets for sealing. After long-term exposure to the chemical corrosion of EGME and vibrations during operation, these rubber gaskets are prone to aging and deformation, leading to seal failure and leakage. Moreover, these simple sealing structures often lack adjustability and cannot adapt to the sealing requirements of the recovery unit under different operating conditions.

[0004] Furthermore, some sealing components require replacement after the recovery unit has been running for a period of time if they become damaged. The complex installation structure consumes a significant amount of time and manpower, increasing equipment downtime and impacting production efficiency. Simultaneously, since ethylene glycol methyl ether recovery units typically operate under specific temperature and pressure conditions, high demands are placed on the high-temperature and high-pressure resistance of the sealing components. However, some existing sealing components exhibit a significant decrease in sealing performance under high-temperature and high-pressure environments, making it difficult to meet production requirements.

[0005] With the increasing demands for safety and environmental protection in the chemical industry, it is urgent to develop a sealing component for ethylene glycol methyl ether recovery devices that is reliable in sealing performance, easy to install and maintain, and adaptable to various working conditions. Utility Model Content

[0006] Based on the above-mentioned technical problems, this utility model proposes a sealing component for an ethylene glycol methyl ether recovery device.

[0007] A sealing assembly for an ethylene glycol methyl ether recovery device includes:

[0008] The tubular interface is fixed to the recycling device, and its inner cavity is provided with an integral coaxial inner tube. The inner wall of the inner tube forms a flow channel, and the upper end of the inner tube is provided with a tapered guide chamfer.

[0009] End face seal located at the bottom of the interface;

[0010] A sealing cap fitted onto the external thread of the interface, the internal thread of which engages with the external thread of the interface and presses against the end face seal;

[0011] A multi-segment telescopic rod penetrating the sealing cover, comprising:

[0012] The front rod is rotatably connected to the sealing plate at its inner end, and the lower surface of the sealing plate is provided with a sealing gasket that matches the chamfer of the tapered guide.

[0013] The outer end extends outward from the sealing cap, and the rear end of the rod is provided with a threaded drive part;

[0014] The front rod and the rear rod are axially slidably connected by a convex-ribbed groove structure. The convex ribs are evenly distributed circumferentially along the outer wall of the front rod, and the inner wall of the rear rod is provided with a matching axial groove.

[0015] An elastic sealing assembly nested at the junction of the front and rear rods, which expands radially when the telescopic rod contracts axially;

[0016] The threaded drive part of the rear rod is threadedly engaged with the top of the sealing cover. The rotation drive part can cause the telescopic rod to move axially, driving the sealing plate and the inner tube to achieve conical sealing engagement or separation. At the same time, the dynamic expansion of the elastic sealing component achieves annular flow channel sealing.

[0017] Furthermore, the thread drive unit is a polygonal operating head located at the outer end of the rear rod, with a cross-shaped tool slot at the top of the operating head.

[0018] Furthermore, the elastic sealing assembly is a conical sleeve structure, with its large-diameter end fixed to the rear shoulder of the front rod and its small-diameter end abutting against the rear end face of the rear rod. When the telescopic rod contracts, it is subjected to axial compression, resulting in radial expansion.

[0019] Beneficial effects:

[0020] 1. Reliable sealing performance: The sealing structure is formed by the end face seal at the bottom of the interface, the conical seal between the sealing plate and the inner tube, and the elastic sealing component at the joint of the telescopic rod. This effectively prevents ethylene glycol methyl ether from leaking from various possible leak points, ensuring the reliability of the sealing components and guaranteeing the safe operation of the ethylene glycol methyl ether recovery unit.

[0021] 2. Adjustability and adaptability: The multi-segment telescopic rod design and the threaded engagement between the threaded drive and the sealing cover allow for flexible adjustment of the sealing state between the sealing plate and the inner tube. Operators can adjust the position of the sealing plate by rotating the threaded drive according to the actual operating conditions of the recycling device, such as temperature and pressure changes, to achieve more precise sealing control and improve the adaptability of the sealing assembly to different operating conditions.

[0022] 3. Easy installation and maintenance: The sealing cover and the interface are connected by threads, making installation and disassembly convenient and quick. When it is necessary to replace the sealing components, simply rotate the sealing cover to easily remove it from the interface. This facilitates the inspection, repair or replacement of end face seals, sealing plates, sealing gaskets and elastic sealing components, greatly reducing equipment downtime and improving production efficiency.

[0023] 4. Sturdy and durable structure: The convex-ribbed groove structure ensures the structural stability of the telescopic rod, making it less prone to damage during frequent extension and contraction. At the same time, the elastic sealing component adopts a conical sleeve structure, which can generate radial expansion evenly when subjected to axial compression, improving the durability of the sealing component, extending its service life, and reducing the maintenance cost of the equipment. Attached Figure Description

[0024] Figure 1 A schematic diagram of the assembled structure of this utility model is shown;

[0025] Figure 2 A cross-sectional structural schematic diagram of the present invention is shown;

[0026] Figure 3 A schematic diagram of the interface structure of this utility model is shown;

[0027] Figure 4 A schematic diagram of the telescopic rod of this utility model is shown;

[0028] Figure 5 A schematic diagram of the structure of the elastic sealing assembly of this utility model is shown;

[0029] In the attached diagram, 1 is the recycling device, 2 is the interface, 3 is the sealing cover, 4 is the inner tube, 5 is the end face seal, 6 is the sealing plate, 7 is the sealing gasket, 8 is the rear rod, 9 is the elastic sealing assembly, 10 is the threaded drive part, 11 is the cross-shaped tool slot, 12 is the front rod, 13 is the protruding rib, and 41 is the tapered guide chamfer. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] like Figures 1-5 The sealing assembly of the ethylene glycol methyl ether recovery device 1 shown consists of a tubular interface 2 fixed to the recovery device 1, an end face seal 5 located at the bottom of the interface 2, a sealing cap 3 sleeved on the external thread of the interface 2, and a multi-segment telescopic rod penetrating the sealing cap 3.

[0032] The tubular interface 2 is fixed to the recovery device 1. Its inner cavity is provided with a coaxial inner tube 4. The inner tube 4 and the interface 2 are an integral structure. The inner wall of the inner tube 4 forms a flow channel for the flow of ethylene glycol methyl ether. The upper end of the inner tube 4 is provided with a conical guide chamfer 41. The conical guide chamfer 41 plays a guiding role, which facilitates the subsequent sealing plate 6 and the inner tube 4 to achieve a precise conical surface sealing fit.

[0033] The end face seal 5 is located at the bottom of the interface 2 and is mainly used to seal the bottom of the interface 2 to prevent ethylene glycol methyl ether from leaking from the bottom of the interface 2, thus providing basic sealing protection for the entire sealing assembly.

[0034] The sealing cap 3 is fitted onto the external thread of the interface 2. Its internal thread is tightly engaged with the external thread of the interface 2. By rotating the sealing cap 3, it can be moved axially along the external thread of the interface 2, thereby pressing the end face seal 5 located at the bottom of the interface 2 and enhancing the sealing effect at the bottom of the interface 2. The sealing cap 3 not only serves to fix and press the end face seal 5, but also provides an installation and support structure for the multi-section telescopic rod.

[0035] The inner end of the front rod 12 of the multi-segment telescopic rod is rotatably connected to the sealing plate 6. The lower surface of the sealing plate 6 is provided with a sealing gasket 7 that matches the conical guide chamfer 41 of the inner tube 4. When the telescopic rod drives the sealing plate 6 to move downward, the sealing gasket 7 can tightly fit the conical guide chamfer 41 of the inner tube 4 to form a conical seal, effectively preventing ethylene glycol methyl ether from leaking from the upper end of the inner tube 4. The rotatable connection design between the sealing plate 6 and the front rod 12 ensures that the sealing plate 6 will not rotate when the sealing cover 3 rotates.

[0036] Rear rod 8 and threaded drive part 10: The outer end of the rear rod 8 extends into a sealing cover 3, and its rear end is provided with a threaded drive part 10. The threaded drive part 10 includes a polygonal operating head and a cross-shaped tool slot 11 on the top of the operating head. The threaded drive part 10 and the thread on the top of the sealing cover 3 are engaged with each other. By rotating the threaded drive part 10, the rear rod 8 can move axially within the sealing cover 3, thereby driving the front rod 12 and the sealing plate 6 to move synchronously, realizing the conical sealing engagement or separation of the sealing plate 6 and the inner tube 4. This design provides adjustability for the sealing assembly, and the sealing state can be flexibly controlled according to the actual working conditions.

[0037] The 13-ribbed groove structure: The front rod 12 and the rear rod 8 are axially slidably connected by the 13-ribbed groove structure. Specifically, the ribs 13 are evenly distributed circumferentially along the outer wall of the front rod 12, and the inner wall of the rear rod 8 is provided with matching axial grooves. This structure ensures that the front rod 12 and the rear rod 8 can slide relative to each other in the axial direction, realizing the telescopic function of the telescopic rod. On the other hand, the circumferentially evenly distributed ribs 13 and the grooves can effectively prevent relative rotation between the front rod 12 and the rear rod 8, ensuring that the sealing plate 6 always maintains the correct orientation during movement and ensuring the sealing effect.

[0038] Elastic sealing component 9: The elastic sealing component 9 is nested in the joint between the front rod 12 and the rear rod 8. This component has a conical sleeve structure, with its large-diameter end fixed to the rear shoulder of the front rod 12 and its small-diameter end abutting against the rear end face of the rear rod 8. When the telescopic rod contracts axially, the elastic sealing component 9 is subjected to axial compression, thereby generating radial expansion, which seals the annular gap between the front rod 12 and the rear rod 8, preventing ethylene glycol methyl ether from leaking from the joint of the telescopic rod. This dynamic expansion sealing method can maintain good sealing performance throughout the telescopic rod's extension and retraction process, adapting to different working conditions.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sealing assembly for an ethylene glycol methyl ether recovery device, characterized in that, include: The tubular interface (2) is fixed to the recycling device (1), and its inner cavity is provided with an integral coaxial inner tube (4). The inner wall of the inner tube (4) forms a flow channel, and the upper end of the inner tube (4) is provided with a tapered guide chamfer (41). The end face seal (5) is located at the bottom of the interface (2); The sealing cap (3) is fitted onto the external thread of the interface (2), and its internal thread engages with the external thread of the interface (2) and presses against the end face seal (5). The multi-segment telescopic rod penetrating the sealing cap (3) includes: The front rod (12) is rotatably connected to the sealing plate (6) at the inner end. The lower surface of the sealing plate (6) is provided with a sealing gasket (7) that matches the tapered guide chamfer (41). The rear rod (8) extends from the outer end of the sealing cap (3), and its rear end is provided with a threaded drive part (10). The front rod (12) and the rear rod (8) are axially slidably connected by a convex-rib groove structure. The convex ribs (13) are evenly distributed along the outer wall of the front rod (12) and the inner wall of the rear rod (8) is provided with matching axial grooves. An elastic sealing assembly (9) is nested at the junction of the front rod (12) and the rear rod (8), which expands radially when the telescopic rod contracts axially; The threaded drive part (10) of the rear rod (8) is threadedly engaged with the top of the sealing cover (3). The rotating drive part can cause the telescopic rod to move axially, driving the sealing plate (6) and the inner tube (4) to achieve conical sealing engagement or separation. At the same time, the dynamic expansion of the elastic sealing component (9) achieves annular flow channel sealing.

2. The sealing assembly for the ethylene glycol methyl ether recovery device according to claim 1, characterized in that, The thread drive part (10) is a polygonal operating head located at the outer end of the rear rod (8), with a cross-shaped tool slot (11) at the top of the operating head.

3. The sealing assembly for the ethylene glycol methyl ether recovery device according to claim 1, characterized in that, The elastic sealing component (9) is a conical sleeve structure. Its large diameter end is fixed to the rear shoulder of the front rod (12), and its small diameter end abuts against the rear end face of the rear rod (8). When the telescopic rod contracts, it is subjected to axial compression and generates radial expansion.

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