阅读说明：本技术 一种空冷器及其控制方法 (Air cooler and control method thereof ) 是由 陈鹏轩 胡成勇 张硕 于 2020-07-02 设计创作，主要内容包括：本文提供了一种空冷器及其控制方法。空冷器包括第一输送管路、多个第一阀门、工作管束组件、备用管束组件、多个第二阀门、第二输送管路和多个压差检测装置；多个第一阀门的一端与第一输送管路的一端相连接、另一端与工作管束组件和备用管束组件的一端一一对应连接；多个第二阀门的一端与第二输送管路的一端相连接、另一端与工作管束组件和备用管束组件的另一端一一对应连接；多个压差检测装置一一对应并联在工作管束组件和备用管束组件上,压差检测装置检测到工作管束组件的压差大于设定压差时,杂质板结形成的块状物堵塞了工作管束组件,此时导通备用管束组件,关断该压差大于设定压差的工作管束组件,以替换的方式确保空冷器正常使用。(An air cooler and a control method thereof are provided. The air cooler comprises a first conveying pipeline, a plurality of first valves, a working pipe bundle assembly, a standby pipe bundle assembly, a plurality of second valves, a second conveying pipeline and a plurality of differential pressure detection devices; one ends of the first valves are connected with one end of the first conveying pipeline, and the other ends of the first valves are correspondingly connected with one ends of the working tube bundle assembly and the standby tube bundle assembly one by one; one ends of the second valves are connected with one end of the second conveying pipeline, and the other ends of the second valves are correspondingly connected with the other ends of the working tube bundle assembly and the standby tube bundle assembly one by one; a plurality of pressure difference detection devices are connected in parallel on the working tube bundle assembly and the standby tube bundle assembly in a one-to-one correspondence mode, when the pressure difference detection devices detect that the pressure difference of the working tube bundle assembly is larger than the set pressure difference, the blocks formed by the hardening of impurities block the working tube bundle assembly, the standby tube bundle assembly is turned on at the moment, the working tube bundle assembly with the pressure difference larger than the set pressure difference is turned off, and the air cooler is ensured to be normally used in a replacement mode.)

1. An air cooler is characterized by comprising a first conveying pipeline, a plurality of first valves, a working pipe bundle assembly, a standby pipe bundle assembly, a plurality of second valves, a second conveying pipeline and a plurality of differential pressure detection devices;

one ends of the first valves are connected with one end of the first conveying pipeline, and the other ends of the first valves are correspondingly connected with one ends of the working tube bundle assembly and the standby tube bundle assembly one by one;

one ends of the second valves are connected with one end of the second conveying pipeline, and the other ends of the second valves are correspondingly connected with the other ends of the working tube bundle assembly and the standby tube bundle assembly one by one;

the plurality of differential pressure detection devices are connected in parallel on the working tube bundle assembly and the standby tube bundle assembly in a one-to-one correspondence manner;

and when the pressure difference of the working tube bundle assembly is greater than the set pressure difference, the standby tube bundle assembly is conducted, and the working tube bundle assembly with the pressure difference greater than the set pressure difference is turned off.

2. The air cooler of claim 1, wherein the working bundle assembly and the backup bundle assembly are removably mounted between the first valve and the second valve.

3. The air cooler of claim 2, wherein the work tube bundle assembly comprises:

a working tube bundle;

the first connecting pipe box is arranged at one end of the working pipe bundle and is detachably connected with the other end of the first valve; and

and the second connecting pipe box is arranged at the other end of the working pipe bundle and is detachably connected with the other end of the second valve.

4. The air cooler of claim 2, wherein the backup bundle assembly comprises:

a spare tube bundle;

the third connecting pipe box is arranged at one end of the standby pipe bundle and is detachably connected with the other end of the first valve; and

and the fourth connecting pipe box is arranged at the other end of the standby pipe bundle and is detachably connected with the other end of the second valve.

5. The air cooler of claim 1, further comprising:

the working tube bundle assembly and the standby tube bundle assembly are arranged on the sliding rail.

6. The air cooler of claim 5, further comprising:

a cooling fan disposed toward the active bundle assembly and the standby bundle assembly; and

and the cooling fan and the sliding rail are arranged on the mounting rack.

7. The air cooler according to claim 1, wherein the working tube bundle assembly comprises 2-4 groups, the spare tube bundle assembly comprises 1-2 groups, fins are mounted on the working tube bundle assembly and the spare tube bundle assembly, and the differential pressure detection device is a differential pressure transmitter.

8. A control method of an air cooler is characterized by comprising the following steps:

when the pressure difference detection device detects that the pressure difference of the working tube bundle assembly is greater than the set pressure difference, the standby tube bundle assembly is conducted, the working tube bundle assembly with the pressure difference greater than the set pressure difference is turned off, and the working tube bundle assembly with the pressure difference greater than the set pressure difference is replaced by the standby tube bundle assembly.

9. The control method of an air cooler according to claim 8, wherein when the differential pressure detecting device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the spare tube bundle assembly is turned on, the working tube bundle assembly having the differential pressure greater than the set differential pressure is turned off, and after the working tube bundle assembly having the differential pressure greater than the set differential pressure is replaced by the spare tube bundle assembly, the control method further comprises:

and when the temperature of the conveying gas is higher than a first set temperature, the switched-off working tube bundle assembly is switched on, the switched-on standby tube bundle assembly is switched off, and the switched-on working tube bundle assembly is dredged by the conveying gas.

10. The control method of an air cooler according to claim 8, wherein when the differential pressure detecting device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the spare tube bundle assembly is turned on, the working tube bundle assembly having the differential pressure greater than the set differential pressure is turned off, and before the working tube bundle assembly having the differential pressure greater than the set differential pressure is replaced by the spare tube bundle assembly, the control method further comprises:

when the ambient temperature is higher than a second set temperature, the air cooler conducts a first number of the working tube bundle assemblies;

when the ambient temperature is lower than a third set temperature, the air cooler conducts a second number of the working tube bundle assemblies;

wherein the second set temperature is greater than the third set temperature, and the first number is greater than the second number.

Technical Field

The invention relates to the technical field of petroleum equipment, in particular to an air cooler and a control method of the air cooler.

Background

The air cooler is used in the natural gas cooling process, but natural gas produced from the stratum contains a plurality of impurities, the impurities are easy to harden to form blocks to block the tube bundle of the air cooler, the effective operation time of the air cooler is seriously shortened, and the blocked tube bundle is difficult to dredge. Therefore, the technical problem which is continuously solved by the technical personnel in the field is to provide the air cooler which is easy to dredge the tube bundle and replace the tube bundle after being blocked so as to increase the effective operation time of the air cooler.

Disclosure of Invention

The embodiment of the invention provides the air cooler, which is easy to dredge a pipe bundle and replace the pipe bundle and can prolong the effective operation time of the air cooler.

The embodiment of the invention provides a control method of an air cooler.

The air cooler provided by the embodiment of the invention comprises a first conveying pipeline, a plurality of first valves, a working pipe bundle assembly, a standby pipe bundle assembly, a plurality of second valves, a second conveying pipeline and a plurality of pressure difference detection devices; one ends of the first valves are connected with one end of the first conveying pipeline, and the other ends of the first valves are correspondingly connected with one ends of the working tube bundle assembly and the standby tube bundle assembly one by one; one ends of the second valves are connected with one end of the second conveying pipeline, and the other ends of the second valves are correspondingly connected with the other ends of the working tube bundle assembly and the standby tube bundle assembly one by one; the plurality of differential pressure detection devices are connected in parallel on the working tube bundle assembly and the standby tube bundle assembly in a one-to-one correspondence manner; and when the pressure difference of the working tube bundle assembly is greater than the set pressure difference, the standby tube bundle assembly is conducted, and the working tube bundle assembly with the pressure difference greater than the set pressure difference is turned off.

Optionally, the working bundle assembly and the spare bundle assembly are removably mounted between the first valve and the second valve.

Optionally, the work tube bundle assembly comprises: a working tube bundle; the first connecting pipe box is arranged at one end of the working pipe bundle and is detachably connected with the other end of the first valve; and the second connecting pipe box is arranged at the other end of the working pipe bundle and is detachably connected with the other end of the second valve.

Optionally, the spare bundle assembly comprises: a spare tube bundle; the third connecting pipe box is arranged at one end of the standby pipe bundle and is detachably connected with the other end of the first valve; and a fourth connection pipe box installed at the other end of the spare pipe bundle and detachably connected with the other end of the second valve.

Optionally, the air cooler further comprises a slide rail, and the working tube bundle assembly and the spare tube bundle assembly are mounted on the slide rail.

Optionally, the air cooler further comprises a cooling fan disposed towards the working bundle assembly and the spare bundle assembly; and the cooling fan and the sliding rail are arranged on the mounting rack.

Optionally, work tube bank subassembly includes 2 ~ 4 groups, reserve tube bank subassembly includes 1 ~ 2 groups, work tube bank subassembly and all install the fin on the reserve tube bank subassembly, pressure differential detection device is pressure differential transmitter.

The control method of the air cooler provided by the embodiment of the invention comprises the following steps:

when the pressure difference detection device detects that the pressure difference of the working tube bundle assembly is greater than the set pressure difference, the standby tube bundle assembly is conducted, the working tube bundle assembly with the pressure difference greater than the set pressure difference is turned off, and the working tube bundle assembly with the pressure difference greater than the set pressure difference is replaced by the standby tube bundle assembly.

Optionally, when the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the standby tube bundle assembly is turned on, the working tube bundle assembly with the differential pressure greater than the set differential pressure is turned off, and after the working tube bundle assembly with the differential pressure greater than the set differential pressure is replaced by the standby tube bundle assembly, the control method further includes:

and when the temperature of the conveying gas is higher than a first set temperature, the switched-off working tube bundle assembly is switched on, the switched-on standby tube bundle assembly is switched off, and the switched-on working tube bundle assembly is dredged by the conveying gas.

Optionally, when the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the standby tube bundle assembly is turned on, the working tube bundle assembly with the differential pressure greater than the set differential pressure is turned off, and before the working tube bundle assembly with the differential pressure greater than the set differential pressure is replaced by the standby tube bundle assembly, the control method further includes:

when the ambient temperature is higher than a second set temperature, the air cooler conducts a first number of the working tube bundle assemblies;

when the ambient temperature is lower than a third set temperature, the air cooler conducts a second number of the working tube bundle assemblies;

wherein the second set temperature is greater than the third set temperature, and the first number is greater than the second number.

According to the air cooler provided by the embodiment of the invention, the working tube bundle assembly is switched on, the spare tube bundle assembly is switched off, the conveying gas is conveyed through the air cooler, when the pressure difference detection device detects that the pressure difference of the working tube bundle assembly is greater than the set pressure difference, the working tube bundle assembly is blocked by the block formed by hardening of impurities, the spare tube bundle assembly is switched on at the moment, the working tube bundle assembly with the pressure difference greater than the set pressure difference is switched off, the working tube bundle assembly with the pressure difference greater than the set pressure difference is replaced by the spare tube bundle assembly, the normal use of the air cooler is ensured, and the effective.

When the temperature of the conveying gas is higher than the first set temperature, the turned-off working tube bundle assembly is turned on, the turned-on standby tube bundle assembly is turned off, the turned-on working tube bundle assembly is dredged through the conveying gas with high temperature, and when the pressure difference of the turned-on working tube bundle assembly is reduced to a set value within the set time, the dredged working tube bundle assembly is conducted again. If the pressure difference of the work tube bundle assembly which is conducted again can not be reduced to the set value after the set time, the spare tube bundle assembly is still used in a replacement mode, and the work tube bundle assembly which is conducted again can be dismounted during maintenance to carry out off-line cleaning dredging or replacement.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a schematic front view of an air cooler according to an embodiment of the present invention;

fig. 2 is a left side view of the air cooler shown in fig. 1.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:

100 first conveying pipelines, 200 first valves, 300 working tube bundle assemblies, 310 first connecting tube boxes, 320 second connecting tube boxes, 400 standby tube bundle assemblies, 500 second valves, 600 second conveying pipelines, 700 differential pressure detection devices, 800 sliding rails, 910 motors, 920 fan blades and 1000 mounting racks.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The air cooler provided by the embodiment of the present invention, as shown in fig. 1 and fig. 2, includes a first delivery pipe 100, a plurality of first valves 200, a working tube bundle assembly 300, a spare tube bundle assembly 400, a plurality of second valves 500, a second delivery pipe 600, and a plurality of differential pressure detection devices 700; one end of the first valves 200 is connected to one end of the first transfer line 100, and the other end is connected to one end of the working bundle assembly 300 and one end of the spare bundle assembly 400 in a one-to-one correspondence; one end of the plurality of second valves 500 is connected to one end of the second transfer line 600, and the other end is connected to the other ends of the working bundle assembly 300 and the spare bundle assembly 400 in a one-to-one correspondence; a plurality of differential pressure detecting devices 700 are connected in parallel to the working bundle assembly 300 and the spare bundle assembly 400 in a one-to-one correspondence; wherein, when the pressure difference of the working tube bundle assembly 300 is greater than the set pressure difference, the spare tube bundle assembly 400 is turned on, and the working tube bundle assembly 300 with the pressure difference greater than the set pressure difference is turned off.

This air cooler, work tube bank subassembly 300 switches on, reserve tube bank subassembly 400 is turn-offed, conveying gas carries through the air cooler, pressure difference detection device 700 detects when work tube bank subassembly 300's pressure differential is greater than the settlement pressure differential, the blocky thing that impurity hardens and forms has blockked up work tube bank subassembly 300, switch on reserve tube bank subassembly 400 this moment, it is greater than the work tube bank subassembly 300 of settlement pressure differential to turn off this pressure differential, it is greater than the work tube bank subassembly 300 of settlement pressure differential to replace this pressure differential through reserve tube bank subassembly 400, ensure air cooler normal use, the effective operating duration of air cooler can be prolonged.

When the temperature of the conveying gas is higher than the first set temperature, the switched-off working tube bundle assembly 300 is turned on, the switched-on standby tube bundle assembly 400 is turned off, the switched-on working tube bundle assembly 300 is dredged by the high-temperature conveying gas, and when the pressure difference of the switched-on working tube bundle assembly 300 is reduced to a set value within a set time, the dredging of the switched-on working tube bundle assembly 300 is completed (which can be realized by manual control or automatic control). If the pressure differential across the newly connected working tube-bundle assembly 300 is still unable to drop to the set value after the set time, it is still replaced by the spare tube-bundle assembly 400, and the newly connected working tube-bundle assembly 300 can be removed for offline cleaning, unblocking, or replacement during servicing.

Of course, the standby tube bundle assembly 400 can be dredged by high-temperature conveying gas after being blocked, even cleaned off-line, dredged or replaced, and the purpose of the present application can be achieved.

When the first valve 200 and the second valve 500 at the two ends of the work-tube-bundle assembly 300 are opened, the work-tube-bundle assembly 300 is conducted; the first valve 200 and the second valve 500 at both ends of the work bundle assembly 300 are closed, and the work bundle assembly 300 is closed; when the first valve 200 and the second valve 500 at the two ends of the spare bundle assembly 400 are opened, the spare bundle assembly 400 is conducted; the first valve 200 and the second valve 500 at both ends of the spare bundle assembly 400 are closed and the spare bundle assembly 400 is closed.

Alternatively, when the differential pressure of the work tube bundle assembly 300 is greater than the set differential pressure, the backup tube bundle assembly 400 is piloted on, and then the work tube bundle assembly 300 with the differential pressure greater than the set differential pressure is turned off; or, when the pressure difference of the working tube bundle assembly 300 is greater than the set pressure difference, the spare tube bundle assembly 400 is turned on, and the working tube bundle assembly 300 with the pressure difference greater than the set pressure difference is turned off synchronously; alternatively, when the pressure differential across the working bundle assembly 300 is greater than the set pressure differential, the working bundle assembly 300 having the pressure differential greater than the set pressure differential is turned off and then the spare bundle assembly 400 is turned on (but this is more prone to clogging problems); the above objectives can be achieved without departing from the design concept of the present invention, and therefore, the details are not repeated herein and all of the objectives should fall within the protection scope of the present application.

Illustratively, the working bundle assembly 300 and the spare bundle assembly 400 are removably mounted between the first valve 200 and the second valve 500 to meet the design requirements for non-unclonable removal of the working bundle assembly 300 and the spare bundle assembly 400.

Illustratively, as shown in FIG. 2, the work bundle assembly 300 includes: a working tube bundle; a first connection pipe box 310 installed at one end of the work tube bundle and detachably connected to the other end of the first valve 200, the work tube bundle and the first valve 200 being connected through the first connection pipe box 310; and a second connection box 320 installed at the other end of the working tube bundle and detachably connected with the other end of the second valve 500, the working tube bundle and the second valve 500 being connected through the second connection box 320.

Illustratively, the spare bundle assembly 400 includes: a spare tube bundle; a third connection pipe box installed at one end of the spare pipe bundle and detachably connected to the other end of the first valve 200, the spare pipe bundle and the first valve 200 being connected through the third connection pipe box; and a fourth connection box installed at the other end of the spare tube bundle and detachably connected with the other end of the second valve 500, the spare tube bundle and the second valve 500 being connected through the fourth connection box.

Fins are arranged on the working tube bundle assembly 300 and the standby tube bundle assembly 400, so that the heat dissipation efficiency can be improved; the working tube bundle and the standby tube bundle respectively comprise a plurality of straight tubes arranged in a matrix form (for example, the straight tubes are arranged in a square shape or a triangular shape), and blocks formed by hardening of impurities are easier to dredge in the straight tubes.

Illustratively, as shown in fig. 1 and 2, the air cooler further includes a skid 800 on which the working bundle assembly 300 and the spare bundle assembly 400 are mounted, the skid 800 facilitating quick installation and removal of the working bundle assembly 300 and the spare bundle assembly 400. The slide rails 800 are arranged in a plurality in one-to-one correspondence with the working bundle assemblies 300 and the spare bundle assemblies 400.

Illustratively, as shown in FIGS. 1 and 2, the air cooler further includes a cooling fan having a motor 910 and fan blades 920 disposed toward the working bundle assembly 300 and the spare bundle assembly 400; and mounting bracket 1000, cooling fan and slide rail 800 are all installed on mounting bracket 1000, and cooling fan is used for dispelling the heat and cooling to work tube bank subassembly 300 and reserve tube bank subassembly 400 to realize reducing the mesh of conveying gas temperature. The transport gas may be natural gas. The cooling fan is disposed in plurality.

Illustratively, working bundle assembly 300 includes 2-4 banks, spare bundle assembly 400 includes 1-2 banks, a bank of spare bundle assemblies 400 replaces a bank of working bundle assemblies 300, and differential pressure sensing device 700 is configured as a differential pressure transmitter.

The air cooler further comprises a control device, the first valve 200 and the second valve 500 are both electric control valves, the electric control valves and the differential pressure transmitter are both electrically connected with the control device, and automatic control is achieved through the control device.

The method for controlling an air cooler (not shown in the figure) provided by the embodiment of the invention comprises the following steps: under the control of the control device, when the pressure difference detection device detects that the pressure difference of the working tube bundle assembly is greater than the set pressure difference, the standby tube bundle assembly is automatically switched on, the working tube bundle assembly with the pressure difference greater than the set pressure difference is automatically switched off, the standby tube bundle assembly replaces the working tube bundle assembly with the pressure difference greater than the set pressure difference, the normal use of the air cooler is ensured, and the effective operation time of the air cooler can be prolonged. The normal pressure differential of the working bundle assembly may be 5-10 kPag. The set pressure difference may be 15 kPag.

Of course, manual control can also be adopted, namely when the pressure difference detection device detects that the pressure difference of the working tube bundle assembly is greater than the set pressure difference, the spare tube bundle assembly is switched on manually, the working tube bundle assembly with the pressure difference greater than the set pressure difference is switched off manually, and the working tube bundle assembly with the pressure difference greater than the set pressure difference is replaced by the spare tube bundle assembly, so that the normal use of the air cooler is ensured.

For example, when the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the standby tube bundle assembly is turned on, the working tube bundle assembly with the differential pressure greater than the set differential pressure is turned off, and the working tube bundle assembly with the differential pressure greater than the set differential pressure is replaced by the standby tube bundle assembly, the control method further includes:

when the temperature of the conveying gas is higher than a first set temperature (the first set temperature can be 180 degrees), the switched-off working tube bundle assembly is switched on, the switched-on standby tube bundle assembly is switched off, the switched-on working tube bundle assembly is subjected to dredging by the conveying gas with high temperature, and when the pressure difference of the switched-on working tube bundle assembly is reduced to a set value (can be 5kPag) within a set time (such as 10min), the dredging of the switched-on working tube bundle assembly is completed and the working tube bundle assembly can be used again. If the pressure difference of the work tube bundle assembly which is conducted again can not be reduced to the set value after the set time, the spare tube bundle assembly is still used in a replacement mode, and the work tube bundle assembly which is conducted again can be dismounted during maintenance to carry out off-line cleaning dredging or replacement. The above process can be controlled manually or automatically. The pressure of the conveying gas is about 2MPa, and the temperature is 50-200 ℃.

When the first valve and the second valve at the two ends of the working tube bundle assembly are opened, the working tube bundle assembly is conducted; the first valve and the second valve at the two ends of the working pipe bundle assembly are closed, and the working pipe bundle assembly is closed; when the first valve and the second valve at the two ends of the spare tube bundle assembly are opened, the spare tube bundle assembly is conducted; and the first valve and the second valve at the two ends of the spare tube bundle assembly are closed, and the spare tube bundle assembly is closed.

For example, when the differential pressure detection device detects that the differential pressure of the working tube bundle assembly is greater than the set differential pressure, the standby tube bundle assembly is switched on, the working tube bundle assembly with the differential pressure greater than the set differential pressure is switched off, and before the working tube bundle assembly with the differential pressure greater than the set differential pressure is replaced by the standby tube bundle assembly, the control method further includes:

when the ambient temperature is higher than a second set temperature (such as summer), the air cooler conducts a first number of working tube bundle assemblies, wherein the first number can be three;

when ambient temperature is less than the third settlement temperature (like winter, the second settlement temperature is higher than the third settlement temperature), the air cooler switches on the work tube bank subassembly of second quantity, and the second quantity can be two, if have three groups work tube bank subassemblies, then switch on two sets of work tube bank subassemblies can, another also can regard as reserve tube bank subassembly, can prevent like this the condition of "freezing stifled" from appearing, ensures that the cooling effect of air cooler is more stable under the different ambient temperature. The above process can be controlled manually or automatically.

In summary, in the air cooler provided in the embodiments of the present invention, the working tube bundle assembly is turned on, the spare tube bundle assembly is turned off, the conveying gas is conveyed through the air cooler, when the pressure difference detection device detects that the pressure difference of the working tube bundle assembly is greater than the set pressure difference, the working tube bundle assembly is blocked by the block formed by hardening of the impurities, the spare tube bundle assembly is turned on, the working tube bundle assembly having the pressure difference greater than the set pressure difference is turned off, the working tube bundle assembly having the pressure difference greater than the set pressure difference is replaced by the spare tube bundle assembly, so that normal use of the air cooler is ensured, and the effective operation.

When the temperature of the conveying gas is higher than the first set temperature, the turned-off working tube bundle assembly is turned on, the turned-on standby tube bundle assembly is turned off, the turned-on working tube bundle assembly is dredged through the conveying gas with high temperature, and when the pressure difference of the turned-on working tube bundle assembly is reduced to a set value within the set time, the dredged working tube bundle assembly is conducted again. If the pressure difference of the work tube bundle assembly which is conducted again can not be reduced to the set value after the set time, the spare tube bundle assembly is still used in a replacement mode, and the work tube bundle assembly which is conducted again can be dismounted during maintenance to carry out off-line cleaning dredging or replacement.

In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "mouth" structure ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the structures referred to have specific orientations, are configured and operated in specific orientations, and thus, are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, or may be connected through two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.