Pneumatic three-way switching valve for adsorption equipment

Abstract

The pneumatic three-way switching valve comprises a valve body and an air cylinder, the valve body is provided with an original gas inlet, an adsorption equipment connecting port and a desorption outlet, a cylinder body of the air cylinder is fixedly arranged on the outer side of the valve body, a piston rod of the air cylinder is inserted into the valve body, and a pressing plate is arranged at the end of the piston rod. The pressing plate can be driven to block the original gas inlet or the desorption outlet by controlling the stretching of the piston rod, so that the adsorption equipment connector is communicated with the desorption outlet or the original gas inlet. According to the pneumatic three-way switching valve for the adsorption equipment, provided by the utility model, aiming at the problems of complicated valve structure, easiness in leakage, low switching efficiency, inconvenience in maintenance and the like existing in the connection mode of a lower interface of an existing adsorption box, a mode of pneumatically controlling the movement of the pressing plate is adopted, and a raw gas inlet or a desorption outlet is blocked; different from a traditional ball valve structure, the adsorption box switching device has the advantages of being fast and reliable in switching.

Description

Technical Field

[0001] This utility model belongs to the field of adsorption equipment technology, and specifically relates to a pneumatic three-way switching valve for adsorption equipment. Background Technology

[0002] During the operation of adsorption equipment, it is necessary to switch the adsorption box between adsorption and desorption states. For example, traditional activated carbon fiber adsorption boxes typically have four ports: an inlet for raw gas containing dichloromethane entering the lower part of the adsorption box, an outlet for clean gas, an inlet for steam, and a desorption outlet. Later, newer designs emerged. One approach is to design the raw gas inlet and desorption outlet at the bottom as a single port on the adsorption box, connected to a reducing tee, with automatic shut-off valves installed on both the desorption outlet and the raw gas inlet. Another approach is to directly connect an automatic shut-off ball valve to this port at the bottom of the adsorption box.

[0003] However, both of these newer designs have significant drawbacks. For the design with a reducing tee and automatic shut-off valve, firstly, the need for two automatic shut-off valves increases the number of valves, making the entire system more complex. This not only increases equipment cost but also raises the difficulty of installation and commissioning. Secondly, the presence of multiple valves increases the risk of leakage; a problem with the seal of any one valve will affect the normal operation of the adsorption tank and reduce system reliability. Furthermore, switching between adsorption and desorption states requires operating two valves separately, making the switching process cumbersome and prone to operational errors or asynchronous valve actions, thus affecting work efficiency.

[0004] While the design of directly connected automatic shut-off ball valves reduces the number of valves, these ball valves frequently switch between the raw gas inlet and desorption outlet functions. Due to the structural characteristics of ball valves, the sealing surface is prone to wear during long-term use, leading to decreased sealing performance and leakage. Furthermore, when valve maintenance is required, the entire valve must be removed from the adsorption tank, which is inconvenient and increases maintenance costs and downtime. In addition, the switching action of the ball valve is relatively slow, failing to meet the rapid switching requirements of the adsorption tank and affecting the efficiency of the entire adsorption-desorption process. Utility Model Content

[0005] In view of this, the purpose of this utility model is to address the shortcomings of the prior art by providing a pneumatic three-way switching valve for adsorption equipment, which enables rapid and reliable switching between adsorption and desorption states in the adsorption box, thereby improving the reliability and ease of maintenance of the system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pneumatic three-way switching valve for an adsorption device includes a valve body and a cylinder. The valve body has a raw gas inlet, an adsorption device connection port, and a desorption outlet. The cylinder body is fixedly installed on the outside of the valve body. The piston rod of the cylinder is inserted into the valve body. A pressure plate is provided at the end of the piston rod. By controlling the extension and retraction of the piston rod, the pressure plate can be driven to block the raw gas inlet or the desorption outlet, so that the adsorption device connection port can be connected to the desorption outlet or the raw gas inlet.

[0008] To better realize this utility model, the above structure is further optimized by providing a top cover on the top of the valve body, and both the cylinder body and the desorption outlet are located on the top cover.

[0009] To better realize this utility model, the above structure is further optimized by providing a lower cover at the bottom of the valve body, and the raw gas inlet is located on the lower cover.

[0010] To better realize this utility model, the above structure is further optimized by providing sealing elements between the upper cover, the lower cover and the valve body.

[0011] To better realize this utility model, the above structure is further optimized, and the adsorption device connection port is set on the side of the valve body.

[0012] To better realize this utility model, the above structure is further optimized. The connection port of the adsorption device is a circular, square or irregularly shaped flange, which is used to match and connect with the lower interface of the adsorption device.

[0013] To better realize this utility model, the above structure is further optimized by providing an inspection port on the valve body, and a sealing cover is provided at the inspection port.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] The pneumatic three-way switching valve for adsorption equipment provided by this utility model addresses the problems of complex valve structure, easy leakage, low switching efficiency, and inconvenient maintenance in existing adsorption box lower interface connection methods. It adopts a pneumatically controlled pressure plate movement to block the raw gas inlet or desorption outlet, thereby completing the switching of the adsorption box between adsorption and desorption states. It is different from the traditional ball valve structure and has the characteristics of fast and reliable switching. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model in the desorbed state;

[0019] Figure 3 This is a schematic diagram of the structure of this utility model in the adsorption state;

[0020] Figure 4 This is a schematic diagram of the back structure of this utility model.

[0021] In the picture:

[0022] 1-Valve body, 101-Upper cover, 102-Lower cover, 2-Cylinder, 3-Raw gas inlet, 4-Adsorption equipment connection port, 5-Desorption outlet, 6-Pressure plate, 7-Inspection port, 8-Sealing cover. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not 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 a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Please refer to Figures 1-4 This utility model provides a pneumatic three-way switching valve for an adsorption device, comprising a valve body 1 and a cylinder 2. The valve body 1 has a raw gas inlet 3, an adsorption device connection port 4, and a desorption outlet 5. The cylinder body of the cylinder 2 is fixedly installed on the outside of the valve body 1, and the piston rod of the cylinder 2 is inserted into the valve body 1. A pressure plate 6 is provided at the end of the piston rod. By controlling the extension and retraction of the piston rod, the pressure plate 6 can be driven to block the raw gas inlet 3 or the desorption outlet 5, so that the adsorption device connection port 4 is connected to the desorption outlet 5 (desorption) or the raw gas inlet 3 (adsorption). This application achieves the blocking of the raw gas inlet 3 or the desorption outlet 5 by using the pneumatic control of the cylinder 2 to move the pressure plate 6, thereby completing the switching between the adsorption box and the desorption state.

[0027] In the adsorption state, the raw gas can only enter the adsorption box from the raw gas inlet 3, while the desorption outlet 5 is in a sealed state; in the desorption state, the raw gas inlet 3 is in a sealed state, and the desorbed gas can only be discharged from the desorption outlet 5.

[0028] In this embodiment, a top cover 101 is provided on the top of the valve body 1, and the cylinder body and desorption outlet 5 are both located on the top cover 101. A bottom cover 102 is provided on the bottom of the valve body 1, and the raw gas inlet 3 is located on the bottom cover 102. Sealing elements are provided between the top cover 101, the bottom cover 102 and the valve body 1 to ensure that the corresponding inlet and outlet can be effectively sealed during adsorption and desorption, effectively preventing gas leakage, reducing leakage risk, and improving the sealing performance and reliability of the system. Because the upper and lower covers are indirectly connected, the outer diameter of the raw gas inlet 3 can be adjusted according to the air intake, and the desorption outlet 5 can be adjusted according to the amount of desorbed vapor, enabling the valve to adapt to different working conditions and improving the versatility and flexibility of the valve.

[0029] When the piston rod of the cylinder moves downward, it drives the pressure plate 6 to move downward as well, pressing the pressure plate 6 tightly against the lower cover 102 of the valve, thereby closing the raw gas inlet 3. When the piston rod of the cylinder moves upward, it drives the pressure plate 6 to move upward, pressing the pressure plate 6 tightly against the upper cover 101, closing the desorption outlet 5. This pneumatic control method has the advantages of fast response and precise control, enabling rapid switching of the adsorption box state.

[0030] Valve body 1, as the main body of the entire valve, has a circular raw gas inlet 3 for connecting to a raw gas pipeline containing dichloromethane. The outer diameter of the raw gas inlet 3 can be adjusted according to the actual air intake volume (e.g., approximately 17040 m³ / s in this application). 3The flow rate (corresponding to a circular outer diameter of 825mm) is adjusted to ensure smooth flow of the raw gas. The adsorption equipment connection port 4 is located on the side of the valve body 1. The adsorption equipment connection port 4 is a circular, square, or irregularly shaped flange used to match and connect with the lower interface of the adsorption equipment. It is designed according to the structural characteristics of the adsorption box to facilitate connection and ensure smooth airflow between the valve body and the adsorption box.

[0031] like Figure 1 and Figure 4 As shown, the valve body 1 is also provided with an inspection port 7, and a sealing cover 8 is provided at the inspection port 7. When the valve connecting rod and other components have problems, they can be inspected and repaired without disassembling the valve, which greatly facilitates maintenance operations and reduces maintenance costs and downtime.

[0032] The pneumatic three-way valve provided by this utility model has a simple structure, a small number of valves, fast and reliable switching, good sealing performance, convenient maintenance without disassembly, adjustable interface, and strong versatility. It effectively solves the problems existing in current designs, enabling rapid and reliable switching between adsorption and desorption states in the adsorption box. Its detachable and adjustable interface design can adapt to different air intake volumes and desorption steam volumes, providing wide applicability. The inclusion of observation and maintenance ports greatly facilitates maintenance operations and reduces maintenance costs. Furthermore, the pneumatic control method has the advantages of fast response and precise control, meeting the operational requirements of frequent state switching in activated carbon fiber adsorption boxes, and possesses strong practicality.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A pneumatic three-way switching valve for an adsorption device, characterized in that: The device includes a valve body (1) and a cylinder (2). The valve body (1) has a raw gas inlet (3), an adsorption device connection port (4), and a desorption outlet (5). The cylinder body of the cylinder (2) is fixedly installed outside the valve body (1). The piston rod of the cylinder (2) is inserted into the valve body (1). The end of the piston rod is provided with a pressure plate (6). By controlling the extension and retraction of the piston rod, the pressure plate (6) can be driven to block the raw gas inlet (3) or the desorption outlet (5), so that the adsorption device connection port (4) is connected to the desorption outlet (5) or the raw gas inlet (3).

2. The pneumatic three-way switching valve for an adsorption device according to claim 1, characterized in that: The valve body (1) is provided with a top cover (101), and the cylinder and the desorption outlet (5) are both provided on the top cover (101).

3. The pneumatic three-way switching valve for an adsorption device according to claim 2, characterized in that: The valve body (1) is provided with a lower cover (102) at the bottom, and the raw gas inlet (3) is provided on the lower cover (102).

4. The pneumatic three-way switching valve for an adsorption device according to claim 3, characterized in that: A sealing element is provided between the upper cover (101), the lower cover (102) and the valve body (1).

5. A pneumatic three-way switching valve for an adsorption device according to claim 4, characterized in that: The adsorption device connection port (4) is located on the side of the valve body (1).

6. A pneumatic three-way switching valve for an adsorption device according to claim 5, characterized in that: The adsorption device connection port (4) is a circular, square or irregularly shaped flange, used to match and connect with the lower interface of the adsorption device.

7. A pneumatic three-way switching valve for an adsorption device according to claim 1, characterized in that: The valve body (1) is also provided with an inspection port (7), and a sealing cover (8) is provided at the inspection port (7).

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