A buckle type rectangular float valve capable of ensuring normal opening and closing and not easy to stick to the tray

Abstract

This utility model relates to the technical field of floating valve tray accessories. It describes a snap-fit ​​rectangular floating valve that ensures normal opening and closing and is less prone to sticking to the tray. The valve includes a valve cover assembly, a valve leg assembly at the bottom of the valve cover assembly, and a mounting snap-fit ​​assembly on the valve leg assembly. This utility model uses stamping to create a fixing snap-fit ​​and an arc-shaped folded edge on the supporting valve leg. During installation, the fixing snap-fit ​​and arc-shaped folded edge swing inwards towards the snap-fit ​​groove. Then, the fixing snap-fit ​​pops out under its own elastic potential energy, completing the installation without the need for any tools. When the floating valve is fully lifted, the arc-shaped folded edge presses against the bottom of the floating valve tray, creating a longitudinal limit on the floating valve. While ensuring guiding stability and structural strength, it achieves low-friction, anti-jamming lift opening and closing. The snap-fit ​​design provides slight buffering under airflow pulsation, reducing the risk of fatigue fracture. The entire floating valve can smoothly open and close vertically, improving the mass transfer efficiency of the tray.

Description

Technical Field

[0001] This utility model belongs to the technical field of floating valve tray accessories, specifically relating to a snap-on rectangular floating valve that ensures normal opening and closing and is not prone to sticking to the tray. Background Technology

[0002] Valve trays are important components in plate towers, providing gas-liquid mass and heat transfer. They play a vital role in chemical, petrochemical, environmental protection, and oil refining industries, especially in distillation, extraction, absorption, and waste gas treatment, where they demonstrate excellent performance. Among plate towers, valve trays are one of the most widely used tray types in modern applications. They allow two fluids to come into close contact, thus facilitating heat and mass exchange between the two phases and achieving the separation of components in liquid or gas mixtures. They are also widely used due to their advantages such as high operational flexibility, high efficiency, strong processing capacity, low pressure drop, non-rotation operation that reduces wear, and easy installation.

[0003] A valve tray is a column with rectangular holes cut into its tray plate. The number of holes must meet the process performance and operation requirements of the column. A float valve is installed above each rectangular hole. A large number of float valves are regularly distributed throughout the tray plate. The float valve is the most critical component of the valve tray. There are many types of float valves, and their shapes include round, rectangular, square, and trapezoidal. The most common type is the rectangular float valve. The rectangular float valve is a valve that can float freely up and down with changes in gas velocity. It can maintain high efficiency over a wide range of gas and liquid loads. In the operation of a typical rectangular float tray, the upward thrust of the gas pushes the rectangular float valve up, and the gas disperses horizontally. When passing through the liquid layer on the tray, the gas and liquid phases are in a foamy state for heat and mass transfer. The existing rectangular floating valve is made of corrosion-resistant materials such as stainless steel. Two valve legs are set at the bottom of the rectangular valve cover. During installation, the valve legs are inserted into the valve hole and fixed, then passed vertically through the valve hole and bent upward to flatten the valve legs to complete the installation. During use, the liquid flow intensity and gas velocity determine the operating performance of the floating valve tray. The gravity of the liquid layer fluid itself is the driving force for the liquid to flow from top to bottom along the tray assembly to the bottom of the tower. When the liquid encounters the upward airflow from the valve hole, the surface tension formed with the liquid will generate upward resistance, thereby achieving the purpose of preventing liquid leakage from the valve hole.

[0004] Existing rectangular float valves can generally meet daily usage needs. However, during installation, the large number of rectangular float valves makes operation difficult, and the existing structure makes it hard to ensure the horizontality of the rectangular float valves during the process of flattening the valve legs, easily causing tilting. It's also difficult to ensure that each rectangular float valve is perfectly level. This tilting prevents the valve cap from effectively covering the rectangular holes on the tray. At low gas velocities, the drooping side of the valve cap causes the other end to tilt upwards, creating a gap. This causes the liquid in the liquid layer to leak directly into the lower tray instead of participating in mass transfer, increasing the leakage rate of the valve holes, wasting the effective area of ​​the tray, and further reducing separation efficiency. At high gas velocities, the drooping side of the valve cap narrows the gas passage, increasing the local pressure drop. Gas will be ejected at high speed on the tilted side of the valve cap, causing mist entrainment or flooding. Excessive mist entrainment will contaminate the product and reduce its purity. Additionally, the contact area between the flattened valve legs and the lower surface of the tray is too large. While this method can reduce lateral sway and rotational tendency, it easily increases the frictional resistance between the valve legs and the tray during operation, further leading to sticking. The rectangular float valve then becomes difficult to open and close smoothly, requiring greater gas velocity to overcome the response lag caused by frictional resistance. Especially when the rectangular float valve is tilted, it is more prone to violent collisions and friction with the tray during tower operation and flutter. Over time, this can cause deformation of the rectangular float valve, bending or breakage of the valve legs, and wear and deformation of the tray. This mechanical damage increases the frequency of shutdowns for maintenance. Simultaneously, the larger contact area between the valve legs and the tray provides more space for solid particles, polymers, salts, or corrosion products to settle and accumulate. These substances harden over time and strongly adhere to the valve legs and tray, increasing the probability of the rectangular float valve jamming, and are difficult to clean. Therefore, designing a snap-fit ​​rectangular float valve that ensures normal opening and closing and is less prone to sticking to the tray is essential. Utility Model Content

[0005] The purpose of this utility model is to provide a snap-fit ​​rectangular float valve with a simple structure and reasonable design that ensures normal opening and closing and is not prone to sticking to the tray in order to solve the above problems.

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

[0007] A snap-fit ​​rectangular float valve that ensures normal opening and closing and is not prone to sticking to the tray includes a valve cover assembly, a valve leg assembly at the bottom of the valve cover assembly, and a mounting snap-fit ​​assembly on the valve leg assembly.

[0008] As a further optimization of this utility model, the valve cover assembly includes an upper valve cover, which is rectangular, with side flaps on both sides and micro-folded edges at both ends of the side flaps.

[0009] As a further optimization of this utility model, the valve leg assembly includes a supporting valve leg disposed at the bottom of the upper valve cover. The supporting valve leg is rectangular and has rounded corners at its bottom edge.

[0010] As a further optimization of this utility model, the mounting buckle assembly includes buckle slots symmetrically distributed on the supporting valve leg, and a fixing buckle connected to the supporting valve leg is provided in the buckle slot, and the top of the fixing buckle is provided with an arc-shaped folded edge.

[0011] The beneficial effects of this utility model are as follows: By stamping, fixing clips and curved edges are directly stamped onto the supporting valve legs. During the top-to-bottom installation of the float valve, the float valve tray first squeezes the fixing clips and curved edges, causing them to swing inwards towards the clip slots. After being fitted onto the float valve tray, the fixing clips pop out of the clip slots under their own elastic potential energy, thus completing the installation. No tools are required. The entire structure is completely symmetrical. When the float valve is fully lifted, the curved edges press against the bottom of the float valve tray, creating a longitudinal limit on the float valve and preventing... The rectangular float valve is prevented from being blown away by the rising airflow. While ensuring guiding stability and structural strength, it reduces the contact area between the valve leg surface and the tray plate, achieving low-friction and anti-jamming lift opening and closing. The snap-fit ​​valve leg structure composed of fixed buckles and arc-shaped folds has strong vibration resistance and can slightly buffer under airflow pulsation, reducing the risk of fatigue fracture. It also ensures precise valve leg limit, making the levelness of each rectangular float valve on the tray plate the same and the lift height accurate. It avoids the float valve tilting due to improper installation, etc., and makes the rectangular float valve open and close vertically and smoothly, improving the mass transfer efficiency of the tray. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a side view of the structure of this utility model;

[0014] Figure 3 This is an assembly diagram of the present invention installed on the floating valve tray;

[0015] Figure 4 This is a comparative structural schematic diagram of the present invention.

[0016] In the diagram: 1. Valve cover assembly; 2. Valve leg assembly; 3. Mounting clip assembly; 11. Upper valve cover; 12. Side flap; 13. Micro-folded edge; 21. Supporting valve leg; 22. Rounded corner; 31. Clip groove; 32. Fixing clip; 33. Arc-shaped folded edge; 100. Main valve cover; 101. Flanged edge; 102. Main valve leg; 103. Leveling valve leg. Detailed Implementation

[0017] 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.

[0018] Example:

[0019] Please see Figures 1-3 A snap-fit ​​rectangular float valve that ensures normal opening and closing and is not prone to sticking to the tray includes a valve cover assembly 1, a valve leg assembly 2 at the bottom of the valve cover assembly 1, and a mounting snap-fit ​​assembly 3 on the valve leg assembly 2. The valve cover assembly 1, valve leg assembly 2 and mounting snap-fit ​​assembly 3 are formed directly into an integral structure by stamping. The valve cover assembly 1 and the valve leg assembly 2 constitute the main structure of the valve body, which fits into the rectangular slot on the float valve tray. The mounting snap-fit ​​assembly 3 is distributed on the valve leg assembly 2 and, together with the rectangular slot of the float valve tray and the valve cover assembly 1, forms a snap-fit ​​limiting structure to prevent the float valve from detaching from the float valve tray.

[0020] The valve cover assembly 1 includes a rectangular upper valve cover 11. The upper valve cover 11 has symmetrically stamped side flaps 12 and micro-folded edges 13 on both sides. The side structure composed of side flaps 12 and micro-folded edges 13 has a certain angle with the plane on which the upper valve cover 11 is located. During operation, when there is no gas or the gas velocity is low, the float valve falls under its own weight. At this time, the side structure composed of side flaps 12 and micro-folded edges 13 is completely attached to the tray plate, which can limit the minimum opening value of the float valve and prevent the float valve channel from being completely closed, thereby reducing leakage.

[0021] The valve leg assembly 2 includes a rectangular support valve leg 21 located at the bottom of the upper valve cover 11. During installation, the support valve leg 21 serves as a limiting structure for the float valve, fitting against both sides of the rectangular slot of the float valve tray, allowing the float valve to slide only in the vertical direction. The bottom edge of the support valve leg 21 is machined with rounded corners 22, which makes the entire structure smoother and prevents scratches to operators.

[0022] The mounting buckle assembly 3 includes buckle slots 31 symmetrically distributed on the support valve leg 21. A fixing buckle 32 is provided in the buckle slot 31 to connect to the support valve leg 21. The top of the fixing buckle 32 has an arc-shaped flange 33. The fixing buckle 32 and the arc-shaped flange 33 are formed on the support valve leg 21 by stamping. After stamping, the buckle slot 31 is formed on the support valve leg 21. The fixing buckle 32 and the arc-shaped flange 33 protrude outwards from the buckle slot 31 and have a certain degree of elasticity. During the process of installing the float valve from top to bottom, the rectangular slot first squeezes the fixing buckle 32 and the arc-shaped flange 33 into the buckle slot. After the valve 31 swings internally and is fitted onto the float valve tray, the retaining clip 32 pops out of the clip slot 31 under its own elastic potential energy, forming a limit on the float valve in the longitudinal position to prevent the rectangular float valve from being blown away by the rising airflow. At the same time, during the limiting process, the arc-shaped folded edge 33 will press against the bottom of the float valve tray to achieve line contact, which greatly reduces the contact area between the float valve and the float valve tray, avoiding the accumulation and hardening of solid particles, polymers, salts or corrosion products, and reducing the probability of the rectangular float valve getting stuck. At the same time, the arc-shaped folded edge 33 will produce a slight deformation along the arc boundary when pressed, buffering the impact force between the float valve and the float valve tray.

[0023] Comparative example:

[0024] Please see Figure 4 The existing rectangular float valve consists of a main valve cover 100, a flange 101, a main valve leg 102, and a swing valve leg 103. The main valve cover 100 has flanges 101 on both sides, and the main valve cover 100 has a main valve leg 102 at the bottom, which is fitted into the rectangular slot of the float valve tray. The swing valve leg 103 is provided on the main valve leg 102. After the existing rectangular float valve is manufactured, the main valve leg 102 and the swing valve leg 103 are on the same plane. After being fitted onto the float valve tray, the operator manually folds the swing valve leg 103 so that it is perpendicular to the main valve leg 102. The swing valve leg 103 is used to limit the float valve and prevent it from detaching from the float valve tray.

[0025] Compared to the comparative example, this utility model uses stamping to directly stamp the fixing buckle 32 and the arc-shaped folded edge 33 on the supporting valve leg 21. The entire structure is completely symmetrical. When the float valve is fully lifted, the arc-shaped folded edge 33 will press against the bottom of the float valve tray, forming a limit on the float valve in the longitudinal position, preventing the rectangular float valve from being blown away by the rising airflow. Under the premise of ensuring guiding stability and structural strength, it reduces the contact area between the valve leg surface and the tray plate, realizing low friction and anti-jamming lift opening and closing. The buckle-type valve leg structure composed of the fixing buckle 32 and the arc-shaped folded edge 33 has strong vibration resistance and can slightly buffer under airflow pulsation, reducing the risk of fatigue fracture. It also ensures accurate valve leg limiting, making the levelness of each rectangular float valve on the tray plate the same and the lift height accurate, avoiding the float valve tilting due to improper installation, so that the rectangular float valve opens and closes vertically and smoothly, improving the mass transfer efficiency of the tray.

[0026] It should be noted that this snap-fit ​​rectangular float valve, which ensures normal opening and closing and is not prone to sticking to the tray, is formed directly on the valve cover assembly 1 by stamping, forming the side flap 12, micro-folded edge 13, supporting valve leg 21, and mounting snap-fit ​​assembly 3. When the entire structure is directly formed, the fixing snap 32 and the arc-shaped folded edge 33 in the mounting snap-fit ​​assembly 3 are symmetrically distributed on the supporting valve leg 21 on both sides. During the process of installing the float valve from top to bottom, the float valve tray first squeezes the fixing snap 32 and the arc-shaped folded edge 33 and swings them into the snap-fit ​​groove 31 to complete the fitting onto the float valve tray. Afterwards, the fixing buckle 32 pops out of the buckle slot 31 under its own elastic potential energy, and the installation is completed without the use of any tools. During operation, when the float valve is fully lifted, the arc-shaped folded edge 33 will press against the bottom of the float valve tray, forming a limit on the float valve in the longitudinal position, preventing the rectangular float valve from being blown away by the rising airflow. When there is no air or the air velocity is low, the float valve falls under its own gravity. At this time, the side structure composed of the side flap 12 and the micro-folded edge 13 is completely attached to the tray plate, which can limit the minimum opening value of the float valve and prevent the float valve channel from being completely closed, thereby reducing leakage.

[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 snap-fit ​​rectangular float valve that ensures normal opening and closing and is not prone to sticking to the tray, comprising a valve cover assembly (1), characterized in that: The bottom of the valve cover assembly (1) is provided with a valve leg assembly (2), and the valve leg assembly (2) is provided with a mounting buckle assembly (3).

2. The snap-fit ​​rectangular float valve according to claim 1, which ensures normal opening and closing and is not prone to sticking to the tray, is characterized in that: The valve cover assembly (1) includes an upper valve cover (11), which is rectangular. The upper valve cover (11) has side flaps (12) on both sides and micro-folded edges (13) at both ends.

3. A snap-fit ​​rectangular float valve according to claim 2, characterized in that: The valve leg assembly (2) includes a supporting valve leg (21) disposed at the bottom of the upper valve cover (11). The supporting valve leg (21) is rectangular and has rounded corners (22) at its bottom edge.

4. A snap-fit ​​rectangular float valve according to claim 3, characterized in that: The mounting buckle assembly (3) includes buckle slots (31) symmetrically distributed on the support valve leg (21), and a fixing buckle (32) connected to the support valve leg (21) is provided in the buckle slot (31), and the top of the fixing buckle (32) is provided with an arc-shaped folded edge (33).

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