A filtration device for thermoplastic elastomer solutions

Abstract

The utility model belongs to liquid filtering device technical field, concretely is a kind of filtering device for thermoplastic elastomer solution, including filter mechanism and pressure measuring mechanism, filter mechanism includes multiple series connection filter tank, the liquid pipe for adjacent filter tank inside intercommunication and the filter screen tank placed in filter tank inside. The filter aperture of each filter screen tank is different, forms multilayer filtration, adopt multiple filter tank each other is connected, cooperate the filter screen tank of different aperture inside and carry out filtration, to realize multistage filtration, compared with prior art, the utility model can avoid the large impurity to the filter screen of smaller aperture large-area block, in turn to different size impurity carries out filtration, guarantees filtration speed.

Description

Technical Field

[0001] This invention belongs to the technical field of liquid filtration devices, specifically a filtration device for thermoplastic elastomer solutions. Background Technology

[0002] Thermoplastic elastomers (TPEs), as a functional material that combines the high elasticity of rubber with the processability of plastics, have shown broad application prospects in fields such as automobile manufacturing, medical devices, and consumer electronics.

[0003] In the industrial production of TPE materials, the catalyst particles remaining in the TPE polymerization reaction (such as organometallic compounds, nanoscale metal oxides, etc.) have complex particle size distribution characteristics and a large size range. If only small-pore filter cartridges are used for filtration, although the filtration effect can be improved, larger impurities will undoubtedly clog the filter pores quickly, which will not only greatly increase the filtration time, but also require frequent cleaning of the filter cartridges. Utility Model Content

[0004] In view of the above-mentioned problems in the filtration of residual catalyst particles in the TPE polymerization reaction, the purpose of this utility model is to provide a filtration device for thermoplastic elastomer solutions.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] This utility model includes a filtration mechanism comprising multiple filter tanks connected in series. Each filter tank has a filter screen tank inside, and the pore size of the filter screen tanks in each filter tank is distributed from large to small along the flow direction of the thermoplastic elastomer solution. The interiors of adjacent filter tanks are connected by liquid flow pipes. Each filter tank has an inlet pipe and an outlet pipe. One end of the inlet pipe is connected to the outlet pipe of the adjacent filter tank, and the other end is connected to the interior of the filter tank. One end of the outlet pipe is connected to the interior of the filter screen tank, and the other end is connected to the inlet pipe of the adjacent filter tank. The inlet pipe on the outermost filter tank on one side is the inlet end of the thermoplastic elastomer solution, and the outlet pipe on the outermost filter tank on the other side is the outlet end of the filtered thermoplastic elastomer solution. The thermoplastic elastomer solution flows in from the inlet end, passes through the filter screen tanks in each filter tank for multiple stages of filtration, and then flows out from the outlet end.

[0007] Each of the filter tanks is equipped with a pressure measuring mechanism for early warning of filter screen blockage.

[0008] The pressure measuring mechanism includes a compression sleeve connected to the inside of the filter tank and equipped with a pressure gauge. The compression sleeve contains a rubber block and a spring. The upper end of the spring is connected to the inner wall of the compression sleeve, and the lower end of the spring is connected to a rubber block that can slide relative to the inner wall of the compression sleeve. The rubber block is interference-fitted with the inner wall of the compression sleeve.

[0009] The inner wall of the extrusion sleeve is provided with a blocking seat to limit the sliding of the rubber block.

[0010] The rubber block is equipped with a counterweight seat for counterweighting and reinforcement.

[0011] The thermoplastic elastomer solution flowing into the filter tank through the inlet pipe flows to the outside of the filter screen tank.

[0012] One end of the outlet pipe on each of the filter tanks is located below the horizontal plane of the inlet pipe.

[0013] The filter tank includes a fixed section and a filter section that are threaded together. The fixed section is connected to one end of the liquid outlet pipe, and the filter section is a filter screen.

[0014] There are three filter tanks, each containing a filter screen. The filter screens are arranged in three stages according to the flow direction of the thermoplastic elastomer solution: primary, secondary, and tertiary. The primary filter screen in the primary filter tank has a pore size of 50–100 μm and is made of sintered stainless steel. The secondary filter screen in the secondary filter tank has a pore size of 10–20 μm and is made of pleated glass fiber. The tertiary filter screen in the tertiary filter tank has a pore size of 1–5 μm and is made of polyethersulfone membrane.

[0015] The filter tank is divided into three detachable sections, which are sealed together by flanges and rubber gaskets, with an observation window on the middle section.

[0016] The advantages and positive effects of this utility model are as follows:

[0017] 1. This utility model uses several filter tanks connected to each other, and uses filter screens with different pore sizes inside to perform filtration, thereby achieving multi-stage filtration.

[0018] 2. This invention can prevent large impurities from clogging a large area of ​​the filter screen with a small pore size, and filter impurities of different sizes in sequence to ensure filtration speed. Attached Figure Description

[0019] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0021] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;

[0022] Figure 3 This is an exploded view of the filtration mechanism of this utility model;

[0023] Figure 4 This is an exploded view of the pressure measuring mechanism of this utility model;

[0024] Wherein: 100 is the filtration mechanism, 110 is the filter tank, 111 is the liquid flow pipe, 1111 is the liquid inlet pipe, 1112 is the liquid outlet pipe, 112 is the filter screen tank, 1121 is the fixed section, 1122 is the filtration section, and 113 is the observation window.

[0025] 200 is the pressure measuring mechanism, 210 is the extrusion sleeve, 211 is the rubber block, 212 is the spring, 213 is the blocking seat, 214 is the counterweight seat, and 215 is the air pressure gauge. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figures 1-3 As shown, this embodiment provides a filtration device for thermoplastic elastomer solutions, including a filtration mechanism 100. The filtration mechanism 100 includes multiple filter tanks 110 connected in series. Each filter tank 110 has a filter screen tank 112 inside. The pore size of the filter screen tank 112 in each filter tank 110 is distributed from large to small along the flow direction of the thermoplastic elastomer solution. The interiors of adjacent filter tanks 110 are connected by a liquid flow pipe 111. The liquid flow pipe 111 on each filter tank 110 is divided into an inlet pipe 1111 and an outlet pipe 1112. One end of the inlet pipe 1111 is connected to the adjacent filter tank. The outlet pipe 1112 of 110 is connected to the inside of the filter tank 110 at the other end. One end of the outlet pipe 1112 is connected to the inside of the filter screen tank 112 at the other end, and the inlet pipe 1111 of the adjacent filter tank 110 is connected to the outlet pipe 1111 at the other end. The inlet pipe 1111 on the outermost filter tank 110 on one side is the inlet end of the thermoplastic elastomer solution, and the outlet pipe 1112 on the outermost filter tank 110 on the other side is the outlet end of the filtered thermoplastic elastomer solution. The thermoplastic elastomer solution flows in from the inlet end, passes through the filter screen tank 112 in each filter tank 110 for multi-stage filtration, and then flows out from the outlet end.

[0029] In this embodiment, there are three filter tanks 110 to ensure filtration efficiency. Each filter tank 110 contains a filter screen tank 112, arranged sequentially as primary, secondary, and tertiary stages according to the flow direction of the thermoplastic elastomer solution, effectively filtering impurities of different sizes. The primary filter screen tank 112 in the primary filter tank 110 has a pore size of 50-100 μm and uses a sintered stainless steel filter screen to trap large particle agglomerates. The secondary filter screen tank 112 in the secondary filter tank 110 has a pore size of 10-20 μm and uses a pleated glass fiber filter screen to capture catalysts of medium particle size. The tertiary filter screen tank 110 has a pore size of 1-5 μm and uses a polyethersulfone (PES) membrane filter screen to remove ultrafine particles.

[0030] The filter canister 110 in this embodiment is made of stainless steel with a wall thickness of 5mm. Each filter canister 110 is divided into three detachable sections, which are sealed and connected by flanges and rubber gaskets. The pressure resistance rating is ≥1.0MPa, which facilitates shutdown maintenance of the internal parts of the filter canister 110. An observation window 113 is provided along the height direction on the middle section of the filter canister 110 to facilitate observation of the filtration status inside the filter canister 110.

[0031] In this embodiment, the liquid inlet pipe 111 is a stainless steel pipe with a wall thickness of 3mm. The liquid inlet pipe 1111 and the liquid outlet pipe 1112 on each filter tank 110 are welded to the top and are equipped with flange joints at the ends.

[0032] In this embodiment, the liquid flow pipe 111 is divided into multiple inlet pipes 1111 and multiple outlet pipes 1112. The inlet pipes 1111 and outlet pipes 1112 are arranged alternately, i.e., inlet pipe 1111, outlet pipe 1112, inlet pipe 1111, outlet pipe 1112... The inlet pipe 1111 (i.e., the inlet section of the liquid flow pipe 111) on the primary filter tank 110 is connected to the thermoplastic elastomer solution inlet and is used to transport unfiltered thermoplastic elastomer solution into the equipment. The outlet pipe 1112 (i.e., the outlet section of the liquid flow pipe 111) on the tertiary filter tank 110 is connected to the thermoplastic elastomer solution outlet and is used to discharge the filtered thermoplastic elastomer solution. One end of the outlet pipe 1112 on each filter tank 110 is located below the horizontal plane of the inlet pipe 1111. The thermoplastic elastomer solution flowing into the filter tank 110 from the inlet pipe 1111 flows to the outside of the filter screen tank 112.

[0033] The filter tank 112 in this embodiment includes a fixed section 1121 and a filter section 1122 that are threadedly connected to each other. The fixed section 1121 is connected to one end of the liquid outlet pipe 1112. The connection method includes, but is not limited to, threaded connection, welding, etc. The filter section 1122 is a filter screen that can be quickly replaced by removing it from the bottom of the filter tank 110.

[0034] During assembly, three filter tanks 110 are connected in series via liquid flow pipes 111. Different filter sections 1122 are installed sequentially on the fixed section 1121 of the filter screen tank 112 inside the filter tank 110 via threaded connections, according to the flow direction of the thermoplastic elastomer solution. These are a stainless steel sintered filter screen tank (first stage), a glass fiber pleated filter screen tank (second stage), and a PES membrane filter screen tank (third stage). During liquid inlet, the thermoplastic elastomer solution is pumped into the first-stage filter tank 110 through the supply end, then enters the first-stage filter screen tank 112. After continuous accumulation, the solution enters the second-stage filter tank 110 through the outlet pipe 1112 on the first-stage filter tank 110. This process is repeated until the solution exits through the outlet end and proceeds to the next process.

[0035] When replacing the filter, turn off the liquid supply pump, loosen the flange bolts at the bottom of the filter tank 110, then rotate the filter section 1122 of the filter tank 112 to separate the filter section 1122 from the fixed section 1121, remove the old filter section (replacement cycle: 200h for stage 1, 100h for stage 2, and 50h for stage 3), apply silicone-based grease to the new filter section and screw it into the fixed section, and finally restore the filter tank 110 to its original position.

[0036] Example 2

[0037] like Figure 1 , Figure 2 and Figure 4 As shown, the difference between this embodiment and embodiment one is that in this embodiment, a pressure measuring mechanism 200 for early warning of clogging of the filter screen tank 112 inside the filter tank 110 is installed on each filter tank 110.

[0038] The pressure measuring mechanism 200 of this embodiment includes a compression sleeve 210 that communicates with the interior of the filter tank 110 and has an external pressure gauge 215. The lower end of the compression sleeve 210 is welded to the top of the filter tank 110 and is internally connected to it. The pressure gauge 215 is located at the upper end of the compression sleeve 210. A rubber block 211 and a spring 212 are respectively housed inside the compression sleeve 210. The upper end of the spring 212 is connected to the inner wall of the compression sleeve 210, and the lower end of the spring 212 is connected to the rubber block 211, which can slide up and down relative to the inner wall of the compression sleeve 210. The rubber block 211 is tightly fitted to the inner wall of the compression sleeve 210 with an interference fit, which can prevent the thermoplastic elastomer solution from entering the pressure gauge 215.

[0039] In this embodiment, the rubber block 211 is made of nitrile rubber. A lead alloy counterweight 214 is embedded inside the rubber block 211 for counterweighting and reinforcement, so that the rubber block 211 can naturally drop under the weight and make the rubber block 211 less prone to deformation.

[0040] In this embodiment, a stop seat 213 is provided on the inner wall of the extrusion sleeve 210 to limit the sliding stroke of the rubber block 211 and avoid excessive compression of the spring 212.

[0041] Normal state: The pressure inside the filter tank 110 is stable, the spring 212 supports the rubber block 211 in the initial position (30mm from the stop seat 213), and the pressure gauge 215 displays the reference pressure.

[0042] Clogging warning: When the filter canister 112 is clogged (such as the third-stage PES membrane is clogged), the pressure inside the corresponding filter canister 110 increases. The thermoplastic elastomer solution inside the filter canister 110 squeezes the rubber block 211 to overcome the elastic force of the spring 212 and moves upward (the displacement is proportional to the pressure). The rubber block 211 compresses the gas in the upper part of the squeeze sleeve 210, and the reading of the pressure gauge 215 rises.

[0043] In this specification, the terms "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A filter device for thermoplastic elastomer solutions, characterized by: The system includes a filtration mechanism (100), which comprises multiple filter tanks (110) connected in series. Each filter tank (110) is equipped with a filter screen (112) inside. The pore size of the filter screen (112) in each filter tank (110) is distributed from large to small along the flow direction of the thermoplastic elastomer solution. The interiors of adjacent filter tanks (110) are connected by a liquid flow pipe (111). The liquid flow pipe (111) on each filter tank (110) is divided into an inlet pipe (1111) and an outlet pipe (1112). One end of the inlet pipe (1111) is connected to the outlet pipe of the adjacent filter tank (110). (1112) is connected to the inside of the filter tank (110) at one end and to the inside of the filter screen tank (112) at the other end. The outlet pipe (1112) is connected to the inside of the filter screen tank (112) at one end and to the inlet pipe (1111) of the adjacent filter tank (110) at the other end. The inlet pipe (1111) on the outermost filter tank (110) on one side is the inlet end of the thermoplastic elastomer solution, and the outlet pipe (1112) on the outermost filter tank (110) on the other side is the outlet end of the filtered thermoplastic elastomer solution. The thermoplastic elastomer solution flows in from the inlet end and flows out from the outlet end after being filtered through the filter screen tank (112) in each filter tank (110) in sequence.

2. The filter device for thermoplastic elastomer solution according to claim 1, characterized in that: Each of the filter tanks (110) is equipped with a pressure measuring mechanism (200) for early warning of clogging of the filter screen tank (112) inside the filter tank (110).

3. The filter apparatus for thermoplastic elastomer solution according to claim 2, characterized by: The pressure measuring mechanism (200) includes a compression sleeve (210) connected to the inside of the filter tank (110) and equipped with a pressure gauge (215). The compression sleeve (210) contains a rubber block (211) and a spring (212). The upper end of the spring (212) is connected to the inner wall of the compression sleeve (210), and the lower end of the spring (212) is connected to the rubber block (211) which can slide relative to the inner wall of the compression sleeve (210). The rubber block (211) is interference-fitted with the inner wall of the compression sleeve (210).

4. The filter apparatus for thermoplastic elastomer solution according to claim 3, characterized by: The inner wall of the extrusion sleeve (210) is provided with a blocking seat (213) to limit the sliding of the rubber block (211).

5. The filtration device for thermoplastic elastomer solutions according to claim 3, characterized in that: The rubber block (211) is provided with a counterweight seat (214) for counterweighting and reinforcement.

6. The filtration device for thermoplastic elastomer solutions according to claim 1, characterized in that: The thermoplastic elastomer solution flowing into the filter tank (110) through the inlet pipe (1111) flows to the outside of the filter screen tank (112).

7. The filtration device for thermoplastic elastomer solutions according to claim 1, characterized in that: One end of the outlet pipe (1112) on each of the filter tanks (110) is located below the horizontal plane of the inlet pipe (1111).

8. The filtration device for thermoplastic elastomer solutions according to claim 1, characterized in that: The filter tank (112) includes a fixed section (1121) and a filter section (1122) that are threaded together. The fixed section (1121) is connected to one end of the liquid outlet pipe (1112), and the filter section (1122) is a filter screen.

9. The filtration device for thermoplastic elastomer solutions according to claim 1, characterized in that: There are three filter tanks (110), and each filter tank (110) is equipped with a filter screen tank (112). According to the flow direction of the thermoplastic elastomer solution, they are arranged as first-stage, second-stage and third-stage. The first-stage filter screen tank (112) in the first-stage filter tank (110) has a pore size of 50-100μm and the filter screen is a sintered stainless steel filter screen. The second-stage filter screen tank (112) in the second-stage filter tank (110) has a pore size of 10-20μm and the filter screen is a glass fiber pleated filter screen. The third-stage filter screen tank (112) in the third-stage filter tank (110) has a pore size of 1-5μm and the filter screen is a polyethersulfone membrane filter screen.

10. The filter apparatus for thermoplastic elastomer solutions of claim 1, wherein: The filter tank (110) is divided into three detachable sections, which are sealed together by flanges and rubber gaskets. An observation window (113) is provided on the middle section.

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