CN-224229320-U - Pneumatic three-way switching valve for adsorption equipment

Abstract

The utility model relates to a pneumatic three-way switching valve for adsorption equipment, which comprises a valve body and a cylinder, wherein a raw gas inlet, an adsorption equipment connecting port and a desorption outlet are formed in the valve body, a cylinder body of the cylinder is fixedly arranged outside the valve body, a piston rod of the cylinder is inserted into the valve body, a pressing plate is arranged at the end part of the piston rod, and the expansion and contraction of the piston rod are controlled to drive the pressing plate to block the raw gas inlet or the desorption outlet so that the adsorption equipment connecting port is communicated with the desorption outlet or the raw gas inlet. The pneumatic three-way switching valve for the adsorption equipment provided by the utility model aims at solving the problems of complex valve structure, easiness in leakage, low switching efficiency, inconvenience in maintenance and the like in the existing adsorption box lower interface connection mode, and realizes the blocking of a raw gas inlet or a desorption outlet by adopting a pneumatic control pressing plate moving mode, so that the adsorption box is switched between adsorption and desorption states, and the pneumatic three-way switching valve is different from the traditional ball valve structure, and has the characteristics of rapidness and reliability in switching.

Inventors

• TU JUNJUN
• LU XIAOFENG
• HUANG YINGJIE
• SHI RENJIE

Assignees

• 苏州多维环保科技有限公司

Dates

Publication Date

20260512

Application Date

20250528

Claims (7)

1. 1. The pneumatic three-way switching valve for the adsorption equipment is characterized by comprising a valve body (1) and a cylinder (2), wherein a raw gas inlet (3), an adsorption equipment connecting port (4) and a desorption outlet (5) are formed in the valve body (1), a cylinder body of the cylinder (2) is fixedly arranged on the outer side of the valve body (1), a piston rod of the cylinder (2) is inserted into the valve body (1), a pressing plate (6) is arranged at the end part of the piston rod, and the pressing plate (6) can be driven to seal the raw gas inlet (3) or the desorption outlet (5) by controlling the expansion and contraction of the piston rod, so that the adsorption equipment connecting port (4) is communicated with the desorption outlet (5) or the raw gas inlet (3).
2. 2. The pneumatic three-way switching valve for the adsorption equipment, as set forth in claim 1, characterized in that an upper cover (101) is arranged at the top of the valve body (1), and the cylinder body and the desorption outlet (5) are both arranged on the upper cover (101).
3. 3. The pneumatic three-way switching valve for the adsorption equipment according to claim 2, wherein a lower cover (102) is arranged at the bottom of the valve body (1), and the raw gas inlet (3) is arranged on the lower cover (102).
4. 4. A pneumatic three-way switching valve for adsorption equipment according to claim 3, wherein sealing elements are arranged between the upper cover (101), the lower cover (102) and the valve body (1).
5. 5. The pneumatic three-way switching valve for the adsorption equipment according to claim 4, wherein the adsorption equipment connecting port (4) is arranged on the side surface of the valve body (1).
6. 6. The pneumatic three-way switching valve for the adsorption equipment according to claim 5, wherein the adsorption equipment connecting port (4) is a circular, square or special-shaped flange and is used for being connected with a lower port of the adsorption equipment in a matching way.
7. 7. The pneumatic three-way switching valve for the adsorption equipment, which is disclosed in claim 1, is characterized in that an overhaul port (7) is further formed in the valve body (1), and a sealing cover (8) is arranged at the overhaul port (7).

Description

Pneumatic three-way switching valve for adsorption equipment Technical Field The utility model belongs to the technical field of adsorption equipment, and particularly relates to a pneumatic three-way switching valve for adsorption equipment. Background In the operation of the adsorption apparatus, it is necessary to realize switching of the adsorption tank between the adsorption state and the desorption state. For example, a conventional activated carbon fiber adsorption tank is generally provided with four interfaces, namely an inlet for entering raw gas containing methylene dichloride into the lower part of the adsorption tank, an outlet for discharging clean gas, an inlet for entering steam and a desorption outlet. Later, a newer design appears, one is to design the two lower ports of the raw gas inlet and the desorption outlet as a port of an adsorption box body, to connect a reducing tee, to respectively install automatic shut-off valves on the desorption outlet and the raw gas inlet, and the other is to directly connect an automatic shut-off ball valve on the port at the lower part of the adsorption box. However, both of these newer designs have significant drawbacks. For the design of the reducing tee joint and the automatic cut-off valve, firstly, as two automatic cut-off valves are required to be installed, the number of the valves is increased, the structure of the whole system is more complex, the cost of equipment is increased, and the difficulty of installation and debugging is also improved. Secondly, the existence of a plurality of valves increases the risk of leakage, and the sealing of any valve is problematic, so that the normal operation of the adsorption box can be influenced, and the reliability of the system is reduced. In addition, when the adsorption state and the desorption state are switched, two valves are required to be respectively operated, the switching process is complicated, and misoperation or asynchronous valve action easily occurs, so that the working efficiency is influenced. For the design of a direct connection automatic shut-off ball valve, the ball valve needs to be frequently switched between the two functions of the raw gas inlet and the desorption outlet, although the number of valves is reduced. Because of the structural characteristics of the ball valve, the sealing surface is easy to wear in the long-term use process, so that the sealing performance is reduced, and the leakage phenomenon occurs. Moreover, when the valve needs to be overhauled, the whole valve is required to be detached from the adsorption box, so that the operation is inconvenient, and the maintenance cost and the downtime are increased. In addition, the switching action of ball valve is slower relatively, can't satisfy the demand of adsorption case fast switch over state, influences the efficiency of whole adsorption desorption process. Disclosure of utility model In view of the above, the utility model aims to overcome the defects in the prior art, and provides a pneumatic three-way switching valve for adsorption equipment, which can realize the rapid and reliable switching of an adsorption box between adsorption and desorption states and improve the reliability and maintenance convenience of a system. In order to achieve the above purpose, the utility model adopts the following technical scheme: The utility model provides a pneumatic tee bend switching valve for adsorption equipment, includes valve body and cylinder, has seted up former gas inlet, adsorption equipment connector and desorption export on the valve body, and the cylinder body of cylinder is fixed to be set up in the valve body outside, and the piston rod of cylinder inserts inside the valve body, and the tip of piston rod is provided with the clamp plate, can drive clamp plate shutoff former gas inlet or desorption export through the flexible of control piston rod, makes adsorption equipment connector intercommunication desorption export or former gas inlet. In order to better realize the utility model, the structure is further optimized, the top of the valve body is provided with an upper cover, and the cylinder body and the desorption outlet are both arranged on the upper cover. In order to better realize the utility model, the structure is further optimized, the bottom of the valve body is provided with a lower cover, and the raw gas inlet is arranged on the lower cover. In order to better realize the utility model, the structure is further optimized, and sealing elements are arranged among the upper cover, the lower cover and the valve body. In order to better realize the utility model, the structure is further optimized, and the adsorption equipment connecting port is arranged on the side surface of the valve body. In order to better realize the utility model, the structure is further optimized, and the connecting port of the adsorption equipment is a circular, square or special-shaped flange which is used for being match