Three-way valve group of static mixer
By designing a static mixer three-way valve group and using a symmetric pneumatic distribution valve and return path, the problems of difficulty in controlling the proportion of A and B materials and blockage of the valve body in the prior art are solved, efficient mixing and reflow of materials are achieved, and production efficiency is improved.
Patent Information
- Application Number
- CN202421939824.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The feed valves at the entry path of the existing static mixer usually use a single plunger valve, which makes it impossible to enter the A and B materials at the same time, and the proportional control is difficult. When the injection is stopped, the remaining material remains in the valve body, which easily leads to blockage of the valve body and affects production efficiency.
A static mixer three-way valve group is designed, using a symmetrically arranged pneumatic distribution valve, including feed passage, discharge passage and return passage. When the feed cylinder control sealing piston is lifted up, the feed passage and discharge passage are connected to the feed passage to complete the mixing; when the sealing piston descends, the feed passage and the return passage are connected to the return passage to complete the return, and the remaining material is returned to the raw material barrel through the return cylinder.
The simultaneous entry and proportional control of A and B materials is achieved, avoiding the blockage caused by material residue in the valve body and improving production efficiency.
Smart Images
Figure CN222823769U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a three-way valve group for a static mixer, belonging to the technical field of vacuum static casting equipment. Background Art
[0002] During vacuum casting, the casting material is generally a mixture of material A and material B, which needs to be fully mixed in a static mixer. The feed valve at the inlet of the existing static mixer usually uses a single plunger valve for feeding, so that material A and material B cannot enter at the same time, and the ratio of material A and material B cannot be controlled, resulting in deviations in the ratio of the mixed materials. At the same time, when the injection is stopped, the remaining material will remain in the valve body. If it is left for a long time, it will cause the valve body to be blocked, resulting in a cumbersome process that requires maintenance during the subsequent injection process, affecting the production efficiency of the product. Summary of the invention
[0003] The technical problem to be solved by the utility model is to provide a three-way valve group for a static mixer, which not only realizes that two materials enter from two sides respectively with a controllable ratio, but also has a material reflux channel to prevent valve body blockage caused by material storage in the valve group.
[0004] In order to solve the above problems, the specific technical scheme of the utility model is as follows: a three-way valve group of a static mixer, two symmetrically arranged pneumatic distribution valves are composed of a feed cylinder and a valve body, and the valve body is respectively provided with a feed passage, a discharge passage and a return passage; when the two feed cylinders control the sealing pistons to lift up, the feed passage is connected with the discharge passage, and the two discharge passages are connected to complete the mixing; when the two feed cylinders control the sealing pistons to descend, the feed passage is connected with the return passage to complete the return; a return cylinder is connected at the outlet of each return passage, and the return cylinder controls the on and off of the return passage.
[0005] The bottoms of the two pneumatic distribution valves are fixed on a mixing fixed block. A mixing cavity is arranged in the mixing fixed block, and the bottom is sealed and connected to a mixing discharge block. The center of the mixing discharge block is a mixing outlet, which is communicated with the inner cavity of the mixing fixed block.
[0006] The valve body is composed of a feed fixing block, a return material fixing block and a sealing seat; the top of the feed fixing block is sealed and connected to the return material fixing block and the sealing seat in sequence, the piston rod seal of the feed cylinder passes through the sealing seat and the return material fixing block, and is connected to the sealing piston, and the sealing piston is located in the vertical cavity of the feed fixing block; the lower part of the feed fixing block is the discharge passage, the return material passage is arranged on the return material fixing block, and is connected to the vertical cavity through which the piston rod of the feed cylinder passes, the piston rod descends, and the bottom of the sealing piston is in sealing contact with the inlet of the discharge passage; the piston rod ascends, and the top of the sealing piston is sealed with the bottom of the vertical cavity of the return material fixing block.
[0007] The piston rod seal of the return cylinder penetrates the return passage of the return fixed block, and the bottom of the return cylinder is provided with a return outlet; when the piston rod of the return cylinder is lifted, the return passage is connected with the return outlet, and when the piston rod of the return cylinder is lowered, the piston rod of the return cylinder is in sealing contact with the return outlet, and the return passage is disconnected from the return outlet.
[0008] The inlet of the feed passage of the feed fixing block is provided with a feed flange.
[0009] A return flange is provided at the return outlet at the bottom of the return cylinder.
[0010] The three-way valve group of the static mixer of the present application adopts the above structure and has the following advantages:
[0011] 1. The symmetrically arranged pneumatic distribution valve structure can inject two raw materials at the same time, and adjust the speed as much as possible according to the proportion, so as to achieve the purpose of mixing the two raw materials, and at the same time, the various remaining raw materials are drained into the original raw material barrel through the return channel;
[0012] 2. The two discharge passages are connected to the mixing fixed block, so that the two materials are mixed in the inner cavity of the mixing fixed block and discharged from the mixing discharge block, completing the mixing process as a whole and achieving the initial mixing function;
[0013] 3. The valve body of each pneumatic distribution valve is provided with a return material fixing block, which can be used to return the raw materials from the return material outlet of the return material cylinder to the raw material barrel without mixing the materials, thereby avoiding the problem of raw material blockage in the valve body. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a three-dimensional diagram of the three-way valve group of the static mixer.
[0015] Figure 2 for Figure 1 AA section view.
[0016] Figure 3 for Figure 2 BB cross-sectional view. DETAILED DESCRIPTION
[0017] like Figures 1 to 3 As shown, a three-way valve group for a static mixer, two symmetrically arranged pneumatic distribution valves 1 are composed of a feed cylinder 2 and a valve body, and the valve body is composed of a feed fixed block 15, a return fixed block 16 and a sealing seat 17; the top of the feed fixed block 15 is sealed and connected to the return fixed block 16 and the sealing seat 17 in sequence, and the piston rod of the feed cylinder 2 passes through the sealing seat 17 and the return fixed block 16, and is connected to the sealing piston 3, and the sealing piston 3 is located in the vertical cavity of the feed fixed block 15. A feed flange 21 is provided at the inlet of the feed passage 11 of the feed fixed block 15.
[0018] A feed passage 11, a discharge passage 12 and a return passage 13 are respectively provided in the valve body; the lower part of the feed fixing block 15 is the discharge passage 12, and the return passage 13 is arranged on the return fixing block 16, and is communicated with the vertical cavity through which the piston rod of the feed cylinder 2 passes; when the two feed cylinders 2 control the sealing piston 3 to be lifted, the top of the sealing piston 3 is sealed with the bottom of the vertical cavity of the return fixing block 16, the feed passage 11 is communicated with the discharge passage 12, and the two discharge passages 12 are communicated to complete the mixing; when the two feed cylinders 2 control the sealing piston 3 to be lowered, the bottom of the sealing piston 3 is in sealing contact with the entrance of the discharge passage 12, the feed passage 11 is communicated with the return passage 13, and the remaining material flows out from the return passage 13.
[0019] The bottoms of the two pneumatic distributing valves 1 are fixed together on a mixing fixed block 5 , a mixing cavity is provided in the mixing fixed block 5 , and the bottom is sealed and connected to a mixing discharge block 6 , the center of the mixing discharge block 6 is a mixing outlet 7 , and the mixing outlet 7 is communicated with the inner cavity of the mixing fixed block 5 .
[0020] The piston rod of the return cylinder 4 seals the return passage 13 of the return fixing block 16, and the bottom of the return cylinder 4 is provided with a return outlet 18; when the piston rod of the return cylinder 4 is lifted, the return passage 13 is connected with the return outlet 18, and when the piston rod of the return cylinder 4 is lowered, the piston rod of the return cylinder 4 is in sealing contact with the return outlet 18, and the return passage 13 is disconnected from the return outlet 18. A return flange 22 is provided at the return outlet 18 at the bottom of the return cylinder 4.
[0021] The working process of the three-way valve group of the static mixer is as follows: the initial position of the feed cylinder 2 is that the sealing piston 3 is in the upper position, and the feed passage 11 and the discharge passage 12 are in a connected state. First, materials A and B enter the feed passage 11 from the feed flanges 21 on both sides, mix in the cavity of the mixing fixed block 5, and then discharge into the next process from the mixing outlet of the mixing discharge block 6. When the next process needs to stop feeding, start the feed cylinder 2 in the lower position, and separate the feed passage 11 and the discharge passage 12 between the sealing piston 3. At the same time, the feed passage 11 and the return passage 13 are opened. When the feed flange 21 is still feeding or there is still residual material in the conveying pipe, the material is fed into the return cylinder 4 through the return passage 13, the return cylinder 4 is opened, the piston of the return cylinder 4 moves up, and the material is discharged from the return outlet 18 of the return flange 22 back to the container containing materials A and B, thereby saving materials and avoiding blockage in the valve body.
Claims
1. A three-way valve group for a static mixer, characterized in that: Two symmetrically arranged pneumatic distribution valves (1) are composed of a feed cylinder (2) and a valve body, wherein a feed passage (11), a discharge passage (12) and a return passage (13) are respectively arranged in the valve body; when the two feed cylinders (2) control the sealing piston (3) to be lifted, the feed passage (11) is connected with the discharge passage (12), and the two discharge passages (12) are connected to complete material mixing; when the two feed cylinders (2) control the sealing piston (3) to be lowered, the feed passage (11) is connected with the return passage (13), and the return passage (13) is completed; a return cylinder (4) is connected at the outlet of each return passage (13), and the return cylinder (4) controls the on and off of the return passage (13).
2. The three-way valve assembly for a static mixer according to claim 1, characterized in that: The bottoms of the two pneumatic distribution valves (1) are fixed together on a mixing fixed block (5). A mixing cavity is provided in the mixing fixed block (5), and the bottom is sealedly connected to a mixing discharge block (6). The center of the mixing discharge block (6) is a mixing outlet (7), and the mixing outlet (7) is in communication with the inner cavity of the mixing fixed block (5).
3. The three-way valve assembly for a static mixer according to claim 1, characterized in that: The valve body is composed of a feed fixing block (15), a return fixing block (16) and a sealing seat (17); the top of the feed fixing block (15) is sealedly connected to the return fixing block (16) and the sealing seat (17) in sequence; the piston rod of the feed cylinder (2) passes through the sealing seat (17) and the return fixing block (16) and is connected to the sealing piston (3); the sealing piston (3) is located in the vertical cavity of the feed fixing block (15); the lower part of the feed fixing block (15) is a discharge passage (12); the return passage (13) is arranged on the return fixing block (16) and communicates with the vertical cavity through which the piston rod of the feed cylinder (2) passes; when the piston rod moves downward, the bottom of the sealing piston (3) is in sealing contact with the inlet of the discharge passage (12); when the piston rod moves upward, the top of the sealing piston (3) is sealed with the bottom of the vertical cavity of the return fixing block (16).
4. The three-way valve assembly for a static mixer according to claim 3, characterized in that: The piston rod of the return cylinder (4) seals and penetrates the return passage (13) of the return fixing block (16), and the bottom of the return cylinder (4) is provided with a return outlet (18); when the piston rod of the return cylinder (4) is lifted, the return passage (13) is connected with the return outlet (18); when the piston rod of the return cylinder (4) is lowered, the piston rod of the return cylinder (4) is in sealing contact with the return outlet (18), and the return passage (13) is disconnected from the return outlet (18).
5. The three-way valve assembly for a static mixer according to claim 3, characterized in that: A feed flange (21) is provided at the inlet of the feed passage (11) of the feed fixing block (15).
6. The three-way valve assembly for a static mixer according to claim 4, characterized in that: A return flange (22) is provided at the return outlet (18) at the bottom of the return cylinder (4).