A removable fixed valve

Abstract

This utility model relates to the field of floating valve tray technology, and discloses a detachable fixed valve, including a valve cover, side valve plates on both sides of the valve cover, valve legs at the bottom of the valve cover, a fixing component on the valve legs, and an overload relief component on the valve cover. This utility model fixes the valve body to the tray plate using the fixing component, achieving complete fixation without tools. While ensuring valve stability and structural strength, it achieves the detachable effect of the fixed valve. In highly corrosive or easily coking conditions, the fixed valve can be vertically pulled out and replaced with professional tools without replacing the entire tray. When encountering large changes in throughput, the opening ratio can be reduced by plugging the holes after removal, allowing for replacement of the individual fixed valve and reducing maintenance costs. The overload relief component provides an additional flow channel for gas when the pressure is too high, achieving pressure relief and preventing structural breakage due to excessive pressure on the fixed valve.

Description

Technical Field

[0001] This utility model belongs to the field of floating valve tray technology, specifically relating to a detachable fixed valve. Background Technology

[0002] Floating valve trays are important components in plate towers that provide gas-liquid mass and heat transfer. They play a vital role in chemical, petrochemical, environmental protection, and oil refining industries. They allow two fluids to come into close contact, thereby facilitating heat and mass exchange between the two phases and achieving the separation of components in liquid or gas mixtures. Furthermore, they are widely used due to their advantages such as high operational flexibility, high efficiency, strong processing capacity, low pressure drop, non-rotational operation which reduces wear, and convenient installation.

[0003] The float valve is the most critical component on the float valve tray. According to the installation method, float valve trays can be divided into detachable float valves and fixed valves. Fixed valves are valve components with valve covers and valve legs integrally stamped on the tray plate, and have a fixed lift height. Its working principle is based on liquid gravity separation and gas buoyancy separation. It is often used in various processes such as gas separation, liquid purification, and chemical reactions. Compared with detachable float valves, fixed valves are widely used because they do not jam, have low resistance, and have fewer mechanical failures.

[0004] In existing fixed valve technology, the valve cover and valve leg are integrally stamped into the tray plate, forming a single component with the tray plate, and have a fixed lift height. This structure is simple to manufacture and has no risk of loosening. It is highly resistant to high-pressure vibration, and the fixed lift height reduces its resistance, which greatly affects its operational flexibility. It can reduce the liquid level gradient, thereby reducing liquid backmixing on the tray plate, and also reduce the pressure drop of the dry plate and the wet plate. This means that the tray plate can maintain efficient operation over a wider range of flow rate variations. However, its disadvantages are also obvious. The integral stamping method can lead to damage to individual float valves, requiring replacement. Replacing the entire tray results in high maintenance costs, especially under conditions of strong corrosion or easy coking. For example, in catalytic cracking units, fixed valves require complete tray replacement on average every 3 years, while detachable floating valves only require replacement of 10% of the floating valves. Calculations show that using fixed valves actually increases costs. In terms of later maintenance, fixed valves cannot adjust the orifice ratio, which is very disadvantageous for units with large fluctuations in throughput. Moreover, the stamped valve legs may break due to tensile stress, all of which require complete tray replacement later, increasing maintenance costs. Therefore, designing a detachable fixed valve is essential. Utility Model Content

[0005] The purpose of this utility model is to provide a simple and reasonably designed detachable fixed valve to solve the above problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A detachable fixed valve includes a valve cover, side valve plates on both sides of the valve cover, valve legs at the bottom of the valve cover, fixing components on the valve legs, and an overload relief component on the valve cover.

[0008] As a further optimization of this utility model, the fixing component includes an upper groove and a lower groove symmetrically distributed on the valve leg, and an upper buckle and a lower buckle connected to the valve leg are respectively provided in the upper groove and the lower groove.

[0009] As a further optimization of this utility model, the overload pressure relief assembly includes a pressure relief port opened on the valve cover, and a pressure relief cover is slidably sleeved in the pressure relief port.

[0010] As a further optimization of this utility model, the pressure relief cover is symmetrically provided with a retaining plate, and the retaining plate is attached to the valve cover.

[0011] As a further optimization of this utility model, the pressure relief cover is symmetrically provided with elastic support feet, which are slidably connected in the support groove, and the support groove is opened on the valve cover.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model uses a stamping process to form an upper and lower latch on the valve leg. The upper and lower latches are symmetrically arranged, with one end extending out of the slot as a limiting structure for fixing the valve. During installation, the lower latch is retracted into the lower slot under the pressure of the tray plate until the upper latch presses against the upper surface of the tray plate. The lower latch, no longer under pressure, slides out again under its own elasticity and presses against the lower surface of the tray plate. At this time, the upper latch prevents the valve from moving downwards, and the lower latch prevents the valve from moving upwards. A completely fixed installation can be achieved without tools. While ensuring the stability and structural strength of the valve, it also achieves the effect of detachable valve fixing, which facilitates future maintenance and reduces throughput. In highly corrosive or easily coking conditions, the valve fixing can be vertically pulled out and replaced with professional tools without replacing the entire tray. When encountering devices with large throughput variations, the valve fixing can be removed and the hole plugged to reduce the opening rate, or the damaged valve fixing can be freely replaced, reducing maintenance costs.

[0014] 2. In this utility model, the pressure relief cover is installed on the valve cover by elastic support feet and clamping plate. When the airflow pressure below is too high, the gap between the valve cover and the tray plate cannot meet the airflow speed. At this time, under the action of pressure, the pressure relief cover moves upward and the elastic support feet deform and bend. After the pressure relief cover is separated from the pressure relief port on the valve cover, it provides an additional flow channel for the gas, realizes pressure relief, and avoids the pressure fixed valve from being subjected to excessive pressure, which may cause structural breakage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the installation position of the pressure relief cover in this utility model;

[0017] Figure 3 This is an exploded structural diagram of the present invention;

[0018] Figure 4 This is a schematic diagram of a structure in the prior art where a fixed valve is directly stamped onto a tray plate.

[0019] In the diagram: 1. Valve cover; 2. Side valve plate; 3. Valve leg; 4. Fixing assembly; 5. Overload relief assembly; 41. Upper slot; 42. Lower slot; 43. Upper buckle; 44. Lower buckle; 51. Pressure relief port; 52. Pressure relief cover; 53. Clamping plate; 54. Flexible support leg; 55. Support groove. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Example

[0022] Please see Figures 1-3 A detachable fixed valve includes a valve cover 1, with side valve plates 2 on both sides of the valve cover 1. The valve cover 1 is connected to the side valve plates 2 as the top plate of the fixed valve. Gas enters the liquid layer through a preset fixed channel area below the valve cover 1 and undergoes mass transfer after full contact. During the process, the gas is dispersed horizontally to both sides along the side valve plates 2 and bubbled out through the liquid layer on the tray plate, so that the gas and liquid phases are fully contacted to achieve the ideal mass transfer effect. A valve leg 3 is provided at the bottom of the valve cover 1. The valve leg 3 is sleeved in a square groove opened on the tray plate. A fixing component 4 is provided on the valve leg 3. The fixing component 4 serves as the limiting structure of the entire fixed valve, limiting the valve leg 3 in the square groove opened on the tray plate. An overload pressure relief component 5 is provided on the valve cover 1. Under normal working conditions, the overload pressure relief component 5 does not have a gas passing effect. When the gas pressure below is too high, the overload pressure relief component 5 will open an additional gas diffusion channel on the valve cover 1 to achieve a pressure relief effect and prevent the fixed valve from being deformed and damaged due to excessive pressure.

[0023] The fixing component 4 includes an upper slot 41 and a lower slot 42 symmetrically distributed on the valve leg 3. The upper slot 41 and the lower slot 42 are respectively provided with an upper buckle 43 and a lower buckle 44 connected to the valve leg 3. The upper buckle 43 and the lower buckle 44 are directly formed by stamping. After forming, the corresponding upper slot 41 and lower slot 42 are formed on the valve leg 3. The upper buckle 43 and the lower buckle 44 are symmetrically arranged, with one end extending out of the slot as a limiting structure for fixing the valve. During installation, the lower buckle 44 will retract into the lower slot 42 under the pressure of the tray plate until the upper buckle 43 presses against the upper surface of the tray plate. The lower buckle 44 loses the pressure restriction and slides out again under its own elastic force, pressing against the lower surface of the tray plate. At this time, the upper buckle 43 prevents the fixed valve from moving down, and the lower buckle 44 prevents the fixed valve from moving up. The installation can be completed without tools.

[0024] As attached Figure 4 The existing fixed valves shown are directly stamped onto the tray plate, with the valve body directly distributed on the tray plate. Compared with the existing fixed valve form, this utility model ensures the stability and structural strength of the valve while achieving the detachable effect of the fixed valve, which facilitates future maintenance and reduces the throughput. In the case of strong corrosion or easy coking, the fixed valve can be vertically pulled out and replaced with professional tools without replacing the entire tray. When encountering devices with large changes in throughput, the fixed valve can be pulled out and the hole can be plugged to reduce the opening rate, or the damaged fixed valve can be freely replaced, reducing maintenance costs.

[0025] The overload pressure relief assembly 5 includes a pressure relief port 51 opened on the valve cover 1. A pressure relief cover 52 is slidably sleeved in the pressure relief port 51. A retaining plate 53 is symmetrically arranged on the pressure relief cover 52 and is attached to the valve cover 1. The retaining plate 53 is connected to the pressure relief cover 52 and prevents the pressure relief cover 52 from falling off by cooperating with the valve cover 1. The pressure relief cover 52 is symmetrically arranged with elastic support legs 54. The elastic support legs 54 are slidably connected in the support groove 55. The support groove 55 is opened on the valve cover 1. The elastic support legs 54 can elastically limit the upward movement of the pressure relief cover 52 and prevent the pressure relief cover 52 from rotating. When the pressure of the airflow below is too high, the gap between the valve cover 1 and the tray plate cannot meet the airflow velocity. At this time, under the action of pressure, the pressure relief cover 52 moves upward and the elastic support legs 54 deform and bend. After the pressure relief cover 52 is separated from the pressure relief port 51 on the valve cover 1, it provides an additional flow channel for the gas and realizes pressure relief.

[0026] It should be noted that this detachable fixed valve first directly forms the main structure of the fixed valve through stamping. After forming, the side valve plates 2 are distributed on both sides of the valve cover 1. At the same time, corresponding upper buckles 43 and lower buckles 44 are formed on the valve legs 3 at the bottom of the valve cover 1. Meanwhile, a pressure relief port 51 for pressure relief is formed on the top of the valve cover 1. The pressure relief cover 52 is sleeved on the pressure relief port 51, and the elastic support 54 is sleeved in the support groove 55. Finally, the clamping plate 53 is bent and attached to the valve cover 1 by a hot pressing device, completing the assembly process of the fixed valve. During installation, the lower buckle 44 will retract into the lower groove 42 under the pressure of the tray plate until the upper buckle 43 presses against the upper surface of the tray plate. The lower buckle 44 loses pressure restriction and slides out again under its own elastic force, pressing against the lower surface of the tray plate. At this time, the upper buckle 43 prevents pressure. The fixed valve is prevented from moving downwards, and the lower latch 44 prevents the fixed valve from moving upwards. Under normal working conditions, the overload pressure relief assembly 5 does not have a gas passage effect. The gas enters the liquid layer through the preset fixed channel area below the valve cover 1 and undergoes mass transfer after full contact. During the process, the gas is dispersed horizontally to both sides along the side valve plate 2 and bubbled out through the liquid layer on the tray plate, so that the gas and liquid phases can fully contact each other and achieve the ideal mass transfer effect. When the pressure of the gas flow below is too high, the gap between the valve cover 1 and the tray plate cannot meet the gas flow velocity. At this time, under the action of pressure, the pressure relief cover 52 moves upwards and the elastic support 54 deforms and bends. After the pressure relief cover 52 is separated from the pressure relief port 51 on the valve cover 1, it provides an additional flow channel for the gas and realizes pressure relief. After the pressure is reduced, the pressure relief cover 52 is re-fitted into the lower slot 42 under the elastic force of the elastic support 54.

[0027] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A detachable fixed valve, comprising a valve cover (1), characterized in that: The valve cover (1) is provided with side valve plates (2) on both sides, the valve cover (1) is provided with valve legs (3) at the bottom, the valve legs (3) are provided with fixing components (4), and the valve cover (1) is provided with overload relief components (5).

2. The detachable fixed valve according to claim 1, characterized in that: The fixing component (4) includes an upper slot (41) and a lower slot (42) symmetrically distributed on the valve leg (3), and an upper buckle (43) and a lower buckle (44) connected to the valve leg (3) are respectively provided in the upper slot (41) and the lower slot (42).

3. A detachable fixed valve according to claim 1, characterized in that: The overload relief assembly (5) includes a relief port (51) opened on the valve cover (1), and a relief cover (52) is slidably sleeved in the relief port (51).

4. A detachable fixed valve according to claim 3, characterized in that: The pressure relief cover (52) is symmetrically provided with a retaining plate (53), and the retaining plate (53) is attached to the valve cover (1).

5. A detachable fixed valve according to claim 4, characterized in that: The pressure relief cover (52) is symmetrically provided with elastic support feet (54), which are slidably connected in the support groove (55), which is opened on the valve cover (1).

Images