Chain type catcher

Abstract

The invention relates to the technical field of traps, in particular to a chain type trap which comprises a trapping cavity provided with an air inlet and an air outlet, a pass partition plate is vertically installed in the trapping cavity, and the trapping cavity is divided into a first flow channel and a second flow channel which are connected in series through the pass partition plate; the first flow channel and the second flow channel are each internally provided with a chain type attachment assembly and a vibration enhancing assembly. The chained trapping assemblies are arranged in the first flow channel and the second flow channel, so that the attachment points of crystals are fully increased, and the trapping rate is effectively improved; the end of the chain vibrates in a vertical reciprocating movement mode, on one hand, crystals are separated from the chain to achieve the purpose of automatic collection, on the other hand, the vibration strength of the chain is automatically enhanced by combining the vibration enhancing assembly, the attached crystals are fully stripped, on the other hand, the chain is conveniently and rapidly straightened, the chain is in a stable crystal complementing state in real time, and the service life of the chain is prolonged. The influence of shaking inertia is effectively avoided, and the time for the chain to recover to the working state of efficiently trapping crystals is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of traps, and particularly to a chain-type trap. Background Art

[0002] Pyromellitic dianhydride (abbreviated as PMDA) is an important chemical raw material. It is a white crystal and is easy to sublimate. Pyromellitic dianhydride is mainly used in the production of high molecular materials such as polyimide. During its production process, high-temperature gas-phase reactions or sublimation are involved. In this process, a trap is used to efficiently capture the solid PMDA crystal particles precipitated in the gas phase.

[0003] Currently, the traps mainly used are fixed-wall condensation traps (such as shell-and-tube, tube-and-shell structures). The crystallization precipitation will adhere to the inner wall of the trap. When a certain amount of crystals adheres, the crystals on the inner wall are made to fall off by vibrating. After that, the crystals are captured again and the foregoing work is repeated. However, due to the limited area of the crystal precipitation attachment points, the trapping capacity per unit volume is limited, and it is difficult to further improve the trapping rate. Moreover, it is difficult for the wall vibration to make the crystals fully detach, and the retention of the crystals will directly reduce the trapping rate of the subsequent crystals, thereby reducing the trapping rate and efficiency of the equipment. Summary of the Invention

[0004] The present invention provides a chain-type trap, which includes a trapping chamber provided with an air inlet and an air outlet. A split partition is vertically installed in the trapping chamber, and the split partition divides the trapping chamber into a first flow channel and a second flow channel connected in series; both the first flow channel and the second flow channel are provided with a chain-type attachment component and a vibration enhancement component; the chain-type attachment component includes a top connection frame, a bottom connection frame, and multiple chains vertically connected between the two. At least one of the top connection frame and the bottom connection frame moves up and down in the vertical direction, so that the chains are converted between being straightened and being slack. During the conversion, the chains generate vibrations, and when the chains are straightened, they are immediately in a stable state of trapping crystals; the vibration enhancement component includes an elastic side pusher and an intermediate member: when the chains are in a vertically straightened state, the elastic side pusher is compressed to store energy; during the collection process, at least one of the top connection frame and the bottom connection frame moves to make the chains slack, and the elastic side pusher releases elasticity to push the chains towards the intermediate member; the distances between each chain and the intermediate member are all different, and each chain impacts the intermediate member asynchronously and collides with each other to form continuous vibrations.

[0005] In a possible implementation manner, the elastic side pusher is inclined downward towards the intermediate member from top to bottom. The top connection frame is arranged to move up and down in the vertical direction in the trapping chamber, the bottom connection frame is fixedly installed in the trapping chamber, and a limit connection member is connected between the chain and the bottom connection frame. The limit connection member is fixedly connected to the chain and is connected to the bottom connection frame in a vertically upward limit manner.

[0006] In a possible implementation manner, the elastic side pusher includes a hinge rod and a roller with grooves circumferentially arranged. The hinge rod is inclined and elastically hinged, the rollers are symmetrically arranged and rotatably installed at the lower end of the hinge rod, and the corresponding chain is located between the symmetrically arranged rollers.

[0007] In a possible implementation manner, the vibration enhancement component further includes a mounting frame. The elastic side pusher and the intermediate member are both mounted on the mounting frame, and the intermediate member is located in the middle of the mounting frame. An elastic member is connected between the intermediate member and the mounting frame. The number of elastic members is several and they are evenly divided into two groups that are symmetrically arranged up and down. Each group of elastic members is connected to the intermediate member at least from four corner points.

[0008] In a possible implementation manner, several said chains are divided into two columns, the intermediate member is located between the two columns of chains and the intermediate member is inclined.

[0009] In a possible implementation manner, the intermediate member includes a first impact area and a second impact area. During the relaxation process of the chain, as the elastic side pusher pushes laterally, the chain first contacts the first impact area, and then the elastic side pusher contacts the second impact area.

[0010] In a possible implementation manner, the first impact area is located above the second impact area.

[0011] In a possible implementation manner, the elastic members located above are inclined towards the intermediate member from top to bottom, and the elastic members located below are inclined towards the intermediate member from bottom to top.

[0012] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following technical effects: A chain type trap provided by the embodiments of the present invention, by arranging a chain type trapping component in the first flow channel and the second flow channel, fully increases the attachment points of crystallization, and effectively improves the trapping rate; the end of the chain makes the chain vibrate in a vertical reciprocating manner. On the one hand, it makes the crystals break away from the chain to achieve the purpose of automatic collection, and combines with the vibration enhancement component to automatically enhance the vibration intensity of the chain, so that the attached crystals are fully peeled off, improving the efficiency of crystal collection. On the other hand, it is convenient for the chain to be quickly straightened, enabling the chain to be immediately in a stable crystallization trapping state, effectively avoiding the influence of shaking inertia and prolonging the time for the chain to return to the efficient crystallization trapping working state, and overall effectively improving the trapping rate and trapping efficiency of crystals; in addition, the chain will also asynchronously impact the intermediate member under the action of the vibration enhancement component to form continuous vibration, further increasing the vibration intensity of the chain and improving the efficiency of crystal trapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is an overall structural schematic diagram of a chain type trap provided by an embodiment of the present invention.

[0014] Figure 2It is a schematic partial cross-sectional structure diagram of a chain-type trap provided by an embodiment of the present invention.

[0015] Figure 3 It is a schematic structure diagram of the top connecting frame, bottom connecting frame and chain of a chain-type trap provided by an embodiment of the present invention.

[0016] Figure 4 It is a schematic structure diagram of the intermediate piece, hinge rod and roller of a chain-type trap provided by an embodiment of the present invention.

[0017] Figure 5 It is a schematic structure diagram of the chain and groove of a chain-type trap provided by an embodiment of the present invention.

[0018] Figure 6 It is a schematic structure diagram of the first impact area and the second impact area of a chain-type trap provided by an embodiment of the present invention.

[0019] Figure 7 It is Figure 3 an enlarged structure diagram of area A in

[0020] In the figure: 1, air inlet; 2, air outlet; 3, trapping chamber; 4, partition plate; 5, chain-type attachment assembly; 51, top connecting frame; 52, bottom connecting frame; 53, chain; 54, limit connecting piece; 6, vibration enhancement assembly; 61, elastic side pusher; 611, hinge rod; 612, groove; 613, roller; 62, intermediate piece; 621, first impact area; 622, second impact area; 63, mounting frame; 64, elastic piece; 7, discharge port. Detailed implementation manners

[0021] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation manners disclosed below.

[0022] Please refer to Figure 1 , Figure 2 and Figure 3, A chain-type trap, comprising a trapping chamber 3 with an air inlet 1 provided on the left side and an air outlet 2 provided on the right side. A discharge port 7 is provided at the bottom of the trapping chamber 3. A partition plate 4 is vertically installed in the trapping chamber 3. The partition plate 4 divides the trapping chamber 3 into a first flow channel and a second flow channel. The air flow enters the trapping chamber 3 from the left air inlet 1, then passes through the first flow channel from top to bottom, then enters the second flow channel, and then passes through the second flow channel from bottom to top and finally flows out from the air outlet 2. Chain-type attachment components 5 and vibration enhancement components 6 are provided in both the first flow channel and the second flow channel. The chain-type attachment components 5 form multiple crystal attachment lines in the trapping chamber 3, which fully increases the attachment points of the crystals and improves the trapping rate. And during the process of crystal shaking-off and collection, the chain-type attachment components 5 are combined with the vibration enhancement components 6 to enable the crystals to quickly and fully detach from the attachment lines, facilitating the continuous and efficient trapping work of the trap. Among them, the partition plate 4 is of a double-layer design, and circulating cooling water passes through the partition plate 4. A jacket is provided outside the trapping chamber 3, and circulating cooling water passes through the jacket. After the air flow enters the trapping chamber 3, it sublimates into a crystal state on the chain 53 under the action of the cooling water. After a certain amount of crystals are formed, they are shaken off to the bottom of the trapping chamber 3 and can be discharged from the discharge port 7. Some crystals adhere to the inner wall of the trapping chamber 3 and can be made to detach by arranging a vibrator outside the container.

[0023] Refer to Figure 2 and Figure 3 , The chain-type attachment component 5 includes a top connection frame 51, a bottom connection frame 52, and multiple chains 53 vertically connected between the two. The top connection frame 51 is arranged to move up and down in the vertical direction in the trapping chamber 3, and the bottom connection frame 52 is fixedly installed in the trapping chamber 3. During the trapping process, the chains 53 are all in a vertically tightened state. During the crystal collection process, the top connection frame 51 reciprocates in the vertical direction, causing the chains 53 to vibrate and collide with the bottom connection frame 52, so that the crystals on the attachment lines are detached. After the crystal collection is completed, the top connection frame 51 resets, and the chains 53 can be tightened and quickly and stably restored to the vertical state of collecting crystals.

[0024] Refer to Figure 2 , Figure 3 , Figure 4 and Figure 6, the vibration enhancement component 6 includes an elastic side pusher 61, an intermediate member 62, and a mounting bracket 63. The mounting bracket 63 is fixedly installed at the middle position of the trapping chamber 3. The elastic side pushers 61 correspond to the chains 53 one by one and are installed on the mounting bracket 63. The elastic side pushers 61 are inclined downward from top to bottom towards the middle of the mounting bracket 63. When the chain 53 is in a vertically straightened state, the elastic side pusher 61 is compressed and stores energy. When the top connecting frame 51 moves downward and the chain 53 becomes slack, the chain 53 will gather downward under the action of gravity. The elastic side pusher 61 releases the elastic force and pushes the chain 53 towards the position where the intermediate member 62 is located, causing the chain 53 to gather towards the middle and collide with the intermediate member 62, increasing the vibration intensity of the chain 53. The distances between each chain 53 and the intermediate member 62 are all different, and each chain 53 will strike the intermediate member 62 asynchronously and collide with each other, forming a continuous vibration state, enabling the crystals to fully separate from the chain 53, improving the crystallization collection rate, and further improving the trapping effect and efficiency of the trap. Combining Figure 3 , Figure 4 and Figure 6 , the chain 53 is divided into two columns, the intermediate member 62 is located between the two columns of chains 53 and is arranged obliquely, and the straight-line distances between the intermediate member 62 and each chain 53 are all unequal.

[0025] Refer to Figure 3 , Figure 4 and Figure 5 , the elastic side pusher 61 includes a hinge rod 611 and a roller 613 with a groove 612 arranged circumferentially. The upper end of the hinge rod 611 is hinged to the mounting bracket 63, and the rollers 613 are symmetrically arranged and rotatably installed at the lower end of the hinge rod 611. The corresponding chain 53 is located between the symmetrically arranged rollers 613. As Figure 5 shown, the chain 53 is located between the grooves 612 on the symmetric rollers 613, and the chain 53 is limited by the symmetric grooves 612 to prevent the chain 53 from separating from the rollers 613. During the vibration process, the chain 53 can also flexibly gather downward.

[0026] Refer to Figure 4 , the intermediate member 62 is installed in the middle of the mounting bracket 63, and an elastic member 64 is connected between the intermediate member 62 and the inner wall of the mounting bracket 63. The number of elastic members 64 is 8, which are evenly divided into two groups and symmetrically distributed up and down. Each group of elastic members 64 is connected to the intermediate member 62 at the two left corner points and the two right corner points respectively. Among them, the elastic member 64 located above is inclined downward from top to bottom towards the intermediate member 62. Similarly, the elastic member 64 located below is inclined upward from bottom to top towards the intermediate member 62.

[0027] Refer to Figure 3 and Figure 7, a limiting connecting member 54 is connected between the chain 53 and the bottom connecting frame 52. The limiting connecting member 54 is fixedly connected to the chain 53 and is connected to the bottom connecting frame 52 in a vertically upward limiting manner. When the chain 53 sags and gathers downward, the limiting connecting member 54 moves downward and separates from the bottom connecting frame 52. The lower end of the chain 53 loses its rigid constraint. During the vibration of the chain 53, the lower end of the chain 53 will swing to a certain extent under the action of inertia. This swing further increases the multi-directionality of the overall vibration of the chain 53 on the vibration of the main body of the chain 53, and more effectively promotes the peeling of the attached crystals. When the chain 53 moves upward and is tightened, the limiting connecting member 54 moves upward and abuts against the bottom end of the bottom connecting frame 52.

[0028] Refer to Figure 4 and Figure 6 , the intermediate member 62 includes a first impact area 621 and a second impact area 622. The first impact area 621 is located above the second impact area 622. The first impact area 621 is an arc structure, and the second impact area 622 is a flat structure. During the relaxation process of the chain 53, with the lateral push of the elastic lateral pusher 61, the chain 53 first impacts and contacts the first impact area 621 and generates a vibration. Immediately afterwards, the elastic lateral pusher 61 impacts and contacts the second impact area 622, and the chain 53 generates a secondary vibration, further separating the crystal from the chain 53 sufficiently.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connected", "installed", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A chain-type trap, comprising a trapping chamber provided with an air inlet and an air outlet, and a split partition vertically installed in the trapping chamber, characterized in that: The split partition divides the trapping chamber into a first flow channel and a second flow channel connected in series; A chain attachment assembly and a vibration enhancement assembly are provided in both the first flow channel and the second flow channel; The chain attachment assembly includes a top connection frame, a bottom connection frame, and multiple chains vertically connected between the two. At least one of the top connection frame and the bottom connection frame moves up and down in the vertical direction, causing the chains to switch between being straightened and slack. During the switching process, the chains generate vibrations, and once the chains are straightened, they immediately enter a stable state for trapping crystals; The vibration enhancement assembly includes an elastic side pusher and an intermediate member: When the chain is in a vertically straightened state, the elastic side pusher is compressed to store energy; During the collection process, at least one of the top connection frame and the bottom connection frame moves to slacken the chains, and the elastic side pusher releases its elasticity to push the chains towards the intermediate member; The distances between each chain and the intermediate member are all different, and each chain strikes the intermediate member asynchronously and collides with each other, forming continuous vibrations.

2. The chain type trap according to claim 1, characterized in that: The elastic side pusher is inclined towards the intermediate member from top to bottom. The top connection frame is arranged to move up and down in the vertical direction in the trapping chamber, the bottom connection frame is fixedly installed in the trapping chamber, and a limit connecting member is connected between the chain and the bottom connection frame. The limit connecting member is fixedly connected to the chain and is connected to the bottom connection frame with vertical upward limit; 3. A chain-type trap according to claim 1 or 2, characterized in that: The elastic side pusher includes a hinged rod and a roller with a groove circumferentially arranged. The hinged rod is inclined and elastically hinged, the rollers are symmetrically arranged and rotatably installed at the lower end of the hinged rod, and the corresponding chain is located between the symmetrically arranged rollers; 4. A chain type trap according to claim 1, characterized in that: The vibration enhancement assembly further includes a mounting frame. The elastic side pusher and the intermediate member are both installed on the mounting frame, and the intermediate member is located in the middle of the mounting frame. An elastic member is connected between the intermediate member and the mounting frame. The number of elastic members is several and they are evenly divided into two groups symmetrically arranged up and down. Each group of elastic members is connected to the intermediate member at least from four corner points; 5. A chain type trap according to claim 1, characterized in that: The several chains are divided into two columns, and the intermediate member is located between the two columns of chains and is inclined; 6. A chain-type trap according to any one of claims 1, 4 or 5, characterized in that: The intermediate member includes a first impact area and a second impact area. During the slackening process of the chain, with the side push of the elastic side pusher, the chain first contacts the first impact area, and then the elastic side pusher contacts the second impact area; 7. A chain-type trap according to claim 6, characterized in that: The first impact area is located above the second impact area; 8. A chain type trap according to claim 4, characterized in that: The elastic members located above are inclined towards the intermediate member from top to bottom, and the elastic members located below are inclined towards the intermediate member from bottom to top.

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