Polyester resin anti-clogging purging device

Abstract

The utility model discloses a kind of polyester resin anti-blocking purging devices, it is related to polyester resin production technical field, including the connecting pipe of being communicated with filter top portion, and interface is opened in the outside of connecting pipe, interface is communicated and is provided with side branch pipe, the sealing block is dynamically sealed in the inner chamber of connecting pipe, and sealing block can slide along the length direction of connecting pipe, to form the high position state located above interface and the low position state located below interface;And when sealing block is in low position state, sealing block is located at the junction of connecting pipe and filter.This utility model sets up a mechanical structure with switchable state on filter, can efficiently, thoroughly solve the blockage problem of polyester resin filter, and simultaneously prevent the stagnation agglomeration of polyester resin in purging pipeline when normal filtering.

Description

Technical Field

[0001] This utility model relates to the field of polyester resin production technology, and specifically to a polyester resin anti-clogging purging device. Background Technology

[0002] Basket filters are a very common and important coarse or pre-filtration device in polyester resin production. They mainly consist of a filter housing and a removable metal filter basket. The filter basket is usually made of stainless steel mesh (such as 304 or 316L stainless steel), and a non-woven filter bag can be installed inside the basket as needed or used alone.

[0003] The basket filter structure in the prior art can be made of Figure 1 The following diagrams are used to represent the filter: 101 represents the filter, 102 represents the filter inlet, 103 represents the filter outlet, and 104 represents the drain outlet located at the bottom of the filter. During operation, the polyester resin to be filtered is pumped into the filter inlet. As it flows through the filter basket, impurities larger than the filter screen pore size are trapped inside or on the surface of the basket, while clean resin flows out from the filter outlet.

[0004] After filtration, some polyester resin will accumulate inside the basket filter. A typical design includes a purge pipe installed at the top of the filter; this purge pipe can be used... Figure 1 The number 105 indicates that the purge pipe and the drain outlet are arranged vertically. By supplying a certain pressure of gas (such as nitrogen) into the purge pipe, the polyester resin accumulated in the filter cavity can be blown out from the drain outlet.

[0005] However, technicians discovered during actual production that some polyester resin tends to overflow into the top purge pipe along the path from the filter inlet to the filter outlet. During the long filtration process, this portion of polyester resin cools and clumps together, blocking the inner cavity of the purge pipe. Consequently, it becomes impossible to deliver gas at a certain pressure into the filter through the purge pipe, resulting in sludge removal failure. Utility Model Content

[0006] The purpose of this invention is to solve the problems in the prior art by proposing a polyester resin anti-clogging purging device. By setting a switchable mechanical structure on the filter, the clogging problem of polyester resin filter can be solved efficiently and thoroughly, and the clogging of polyester resin in the purging pipeline can be prevented at the same time during normal filtration.

[0007] To solve the above problems, this utility model provides the following technical solution: A polyester resin anti-clogging purging device includes a connecting pipe connected to the top of a filter, with an interface on the outside of the connecting pipe and a side branch pipe connected to the interface. A sealing block is dynamically sealed inside the connecting pipe, and the sealing block can slide along the length of the connecting pipe to form a high position above the interface and a low position below the interface. When the sealing block is in the low position, it is located at the junction of the connecting pipe and the filter.

[0008] As a further embodiment of this utility model: a sealing ring that mates with the inner cavity of the connecting pipe is fitted around the outer circumference of the sealing block, so as to achieve dynamic sealing installation of the sealing block in the inner cavity of the connecting pipe.

[0009] As a further aspect of this invention, the device also includes a driving component for driving the sealing block to slide within the connecting pipe cavity.

[0010] As a further embodiment of this utility model: the driving component includes a threaded rod, which is threadedly mounted on the connecting pipe, and one end of the threaded rod is inserted into the inner cavity of the connecting pipe and rotatably connected to the sealing block.

[0011] As a further embodiment of this utility model: the driving component includes a telescopic rod, which is mounted on the connecting pipe, and the piston portion of the telescopic rod extends into the inner cavity of the connecting pipe and is rotatably connected to the sealing block.

[0012] As a further embodiment of this utility model: the side branch pipe is designed with an overall inclination, and the pipe opening of the side branch pipe is located above the interface.

[0013] As a further embodiment of this utility model: a control handwheel is installed at the end of the threaded rod located outside the connecting pipe.

[0014] As a further embodiment of this utility model, the connecting pipe and the side branch pipe are both covered with a heat insulation layer.

[0015] As a further embodiment of this utility model, the connecting pipe is provided with a bracket for mounting the driving component.

[0016] As a further embodiment of this utility model, a control valve is provided on the side branch pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. By sliding the sealing block inside the connecting pipe, the different states of the sealing block can be switched. Specifically: During normal filtration, the sealing block is in a low position, which can completely seal the junction between the connecting pipe and the filter, effectively preventing polyester resin from overflowing into the upstream connecting pipe and the side branch pipe, and avoiding the formation of an empty area in this area where resin accumulates. During purging and cleaning, the sealing block switches to a high position to make way for the purging gas. At the same time, it acts as a dynamic sealing piston to ensure that all the high-pressure gas introduced from the side branch pipe acts downward on the filter, forming a powerful and directional purging.

[0018] 2. A reliable dynamic seal between the sealing block and the connecting pipe is achieved through the sealing ring, which ensures that the inner cavity of the connecting pipe can be tightly divided into two independent isolation zones, upper and lower, regardless of whether the sealing block is in a moving state or fixed in a high or low position.

[0019] 3. By setting up a driving component to switch the state of the plugging block, operators can easily and accurately control the plugging block to switch between high and low states, which not only reduces labor intensity but also improves the reliability and repeatability of the entire purging process.

[0020] 4. By designing the side branch pipe as an inclined type, with its inlet located above the connecting pipe interface, this structural design gives the gas a downward movement tendency when it enters, allowing the airflow to impact the inside of the filter more directly and concentratedly. This more effectively drives the residual polyester resin and filter residue downwards and out of the drain port, improving purging efficiency and cleanliness. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a cross-sectional view of a filter in the prior art; Figure 2 This is a cross-sectional view of Embodiment 1 of the present invention. Figure 1 ; Figure 3 This is a cross-sectional view of Embodiment 1 of the present invention. Figure 2 ; Figure 4 This is a cross-sectional view of the structure of the present invention as described in Embodiment 1 of the present invention, which is disposed on the filter. Figure 5 This is a cross-sectional structural diagram of Embodiment 2 of this utility model.

[0023] In the diagram: 101, filter; 102, filter inlet; 103, filter outlet; 104, drain outlet; 105, purge pipe; 1. Connecting pipe; 2. Side branch pipe; 3. Sealing block; 4. Sealing ring; 5. Threaded rod; 6. Telescopic rod; 7. Operating handwheel; 8. Insulation layer; 9. Bracket; 10. Control valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: like Figures 2-4 As shown, a polyester resin anti-clogging purging device includes a connecting pipe 1. An interface is provided on one side of the connecting pipe 1, and a branch pipe 2 is connected to the interface. Both the connecting pipe 1 and the branch pipe 2 are covered with an insulation layer 8. The branch pipe 2 is used to supply gas (e.g., nitrogen) at a certain pressure into the connecting pipe 1, and a control valve 10 is provided on the branch pipe 2. A sealing block 3 is dynamically sealed inside the connecting pipe 1. The sealing block 3 can be driven to slide along the length of the connecting pipe 1. Because the sealing block 3 is dynamically sealed inside the connecting pipe 1, it will divide the inner cavity of the connecting pipe 1 into upper and lower isolation zones regardless of where it moves.

[0026] Based on the interface position on connecting pipe 1, when the sealing block 3 is located above the interface position, the sealing block 3 is defined as being in a high position. This state can be determined by... Figure 2 This is used to represent the state; when the blocking block 3 is located below the interface position, the blocking block 3 is defined as being in a low state, which can be represented by... Figure 3 To represent it.

[0027] A schematic diagram of the structure of this device mounted on filter 101 can be obtained from... Figure 4 To illustrate, the bottom end of the connecting pipe 1 is connected to the top of the filter 101, effectively replacing the original purge pipe 105 with this device. It should be noted that the high position of the sealing block 3 is arbitrary, as long as it is higher than the interface position; while the low position of the sealing block 3 is preferably located at the junction of the connecting pipe 1 and the filter 101, that is... Figure 4 As shown, in this state, the sealing block 3 is flush with the top inner wall of the filter 101 to prevent the connection pipe 1 from creating a vertical empty area and accumulating some polyester resin.

[0028] The workflow is as follows: When filter 101 is performing normal filtration, the blocking block 3 needs to be driven to a low position, that is... Figure 4As shown, in the path of the polyester resin flowing from the filter inlet 102 to the filter outlet 103, due to the presence of the sealing block 3, the polyester resin will not overflow into the connecting pipe 1 and the branch pipe 2, but will only be discharged from the filter outlet 103. After the filtration work is completed, the filter inlet 102 can be closed, the filter outlet 103 can be closed, the drain port 104 can be opened, and the control valve 10 can be opened, and then the sealing block 3 can be driven to the high position, that is... Figure 2 As shown, the side branch pipe 2 and the connecting pipe 1 are connected. Then, by passing gas at a certain pressure into the side branch pipe 2, the gas can enter the filter 101 through the connecting pipe 1, and blow the residual polyester resin and filter residue in the filter 101 downward until all the residual polyester resin and filter residue are discharged from the drain port 104.

[0029] For the dynamic sealing installation of the sealing block 3 in the inner cavity of the connecting pipe 1, a sealing ring 4 can be fitted around the outer circumference of the sealing block 3.

[0030] For the layout design of the side branch pipe 2, for ease of assembly, the port of the side branch pipe 2 is generally directly connected horizontally to the interface of the connecting pipe 1. However, in order to make the gas entering the connecting pipe 1 from the side branch pipe 2 have a downward movement tendency, this application designs the side branch pipe 2 as an entire inclined type. Figure 2 As shown, this inclined design means that the left port of the side branch pipe 2 is lower and the right port is higher, that is, the right port of the side branch pipe 2 is located above the interface. When gas of a certain pressure is introduced through the right port of the side branch pipe 2, the gas will have a downward movement tendency. This downward movement tendency can better act on the residual polyester resin and filter cake in the filter 101, so that the polyester resin has a faster downward force until it is discharged from the drain port 104.

[0031] In order to enable the blocking block 3 to switch between high and low states, this application can provide a bracket 9 on the connecting pipe 1, and install a driving component on the bracket 9. The driving component is used to drive the blocking block 3 to slide within the cavity of the connecting pipe 1.

[0032] Specifically, the driving component includes a threaded rod 5, which is threadedly mounted on the bracket 9 of the connecting pipe 1. One end of the threaded rod 5 is inserted into the inner cavity of the connecting pipe 1 and rotatably connected to the sealing block 3. A control handwheel 7 is installed at the end of the threaded rod 5 outside the connecting pipe 1. When the control handwheel 7 is rotated, the threaded rod 5 will move up or down on the bracket 9 while rotating. Since the sealing block 3 and the threaded rod 5 are rotatably connected, the rotation of the threaded rod 5 will not affect the sealing block 3. However, the up and down movement of the threaded rod 5 can drive the sealing block 3 to move accordingly, realizing the switching between the high and low positions of the sealing block 3.

[0033] It should be noted that the diameter of the threaded rod 5 can also be set to match the inner diameter of the connecting pipe 1. Correspondingly, the inner cavity of the connecting pipe 1 is provided with an internal thread, and the threaded rod 5 is installed by interlocking with the external thread and the internal thread.

[0034] Example 2: like Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the driving component is improved and replaced in this embodiment. Specifically, the driving component includes a telescopic rod (e.g., an electric telescopic rod or an electric push rod) 6. The telescopic rod 6 is mounted on the connecting pipe 1, and the piston part of the telescopic rod 6 extends into the inner cavity of the connecting pipe 1 and is rotatably connected to the sealing block 3. By changing the position of the piston part of the telescopic rod 6, the sealing block 3 can be driven to move accordingly, realizing the switching of the sealing block 3 between the high position state and the low position state.

[0035] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A polyester resin anti-clogging purging device, characterized in that, The system includes a connecting pipe (1) located at the top of the filter, and an interface is provided on the outside of the connecting pipe (1). A side branch pipe (2) is connected to the interface. A sealing block (3) is provided in the inner cavity of the connecting pipe (1). The sealing block (3) can slide along the length of the connecting pipe (1) to form a high position above the interface and a low position below the interface. When the sealing block (3) is in the low position, the sealing block (3) is located at the junction of the connecting pipe (1) and the filter (101).

2. The polyester resin anti-clogging purging device according to claim 1, characterized in that, The sealing block (3) is fitted with a sealing ring (4) that mates with the inner cavity of the connecting pipe (1) on its outer circumference, so as to achieve dynamic sealing installation of the sealing block (3) in the inner cavity of the connecting pipe (1).

3. The polyester resin anti-clogging purging device according to claim 1, characterized in that, The device also includes a drive for driving the sealing block (3) to slide within the cavity of the connecting pipe (1).

4. The polyester resin anti-clogging purging device according to claim 3, characterized in that, The driving component includes a threaded rod (5), which is threadedly mounted on the connecting pipe (1), and one end of the threaded rod (5) is inserted into the inner cavity of the connecting pipe (1) and rotatably connected to the sealing block (3).

5. The polyester resin anti-clogging purging device according to claim 3, characterized in that, The drive unit includes a telescopic rod (6), which is mounted on the connecting pipe (1), and the piston portion of the telescopic rod (6) extends into the inner cavity of the connecting pipe (1) and is rotatably connected to the sealing block (3).

6. A polyester resin anti-clogging purging device according to any one of claims 1-5, characterized in that, The side branch pipe (2) is designed with an inclination, and the pipe opening of the side branch pipe (2) is located above the interface.

7. The polyester resin anti-clogging purging device according to claim 4, characterized in that, The threaded rod (5) is equipped with a handwheel (7) at one end outside the connecting pipe (1).

8. A polyester resin anti-clogging purging device according to any one of claims 1-5, characterized in that, The connecting pipe (1) and the side branch pipe (2) are both covered with a heat insulation layer (8).

9. The polyester resin anti-clogging purging device according to claim 3, characterized in that, The connecting pipe (1) is provided with a bracket (9) for mounting the drive component.

10. A polyester resin anti-clogging purging device according to any one of claims 1-5, characterized in that, A control valve (10) is installed on the side branch pipe (2).

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