External air-conditioning system pipeline sewage disposal device

Abstract

The invention discloses an external sewage disposal device for an air conditioning system pipeline. The external sewage disposal device comprises a variable-diameter sealing mechanism, a filter cover screwing part, a connecting pipe and a sewage storage bin, an annular air bag is arranged in the variable-diameter sealing mechanism, and an air supply port is formed in the variable-diameter sealing mechanism in a penetrating mode. The filter cover screwing part is arranged behind the variable-diameter sealing mechanism, and a screwing buckle is arranged in the filter cover screwing part; the connecting pipe is fixed on the filter cover screwing part and comprises a rigid connecting pipe and a semi-rigid connecting pipe; the rigid connecting pipe and the semi-rigid connecting pipe are connected through a rotary connecting piece, the rotary connecting piece is composed of an upper connecting nut, a lower connecting nut, an outer-layer sealing pipe, an inner-layer sealing pipe and an axial sealing ring, the upper connecting nut is connected with the outer-layer sealing pipe, the lower connecting nut is connected with the inner-layer sealing pipe, and the axial sealing ring is connected with the outer-layer sealing pipe. A plurality of sealing rings are arranged between the outer-layer sealing pipe and the inner-layer sealing pipe, so that the rotating function and the sealing function of the rotating connecting piece can be realized; and the rigid connecting pipe is provided with a backflushing air source interface.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning system maintenance equipment, in particular to a special device for online cleaning operation of Y-type filter in air conditioning water system pipeline. BACKGROUND

[0002] In the water circulation pipeline of central air conditioning system, Y-type filter is a key filtering component, which is used to intercept impurities such as welding slag, rust, scale and the like in the pipeline, and to protect the water pump, main heat exchanger and the like. In order to ensure normal operation of the system, the Y-type filter needs to be cleaned regularly.

[0003] The common cleaning method at present is that the operator directly uses a tool (such as a wrench) to unscrew the blowdown valve or end cover at the bottom of the filter. This process has obvious defects: 1. Great safety hazard: when there is pressure or viscous dirt in the system, the sewage and impurities are extremely easy to be sprayed at high speed under the action of pressure, which can cause harm to the face, eyes and body of the operator who is close; 2. Serious environmental pollution: the sprayed sewage and dirt pollute the ground and wall surface between the equipment, and even flow into the floor drain to cause blockage, which makes the cleaning work cumbersome and affects the on-site environment; 3. Low cleaning efficiency: in order to reduce the spraying, the operator often needs to operate slowly and carefully, and place a temporary water container below, which consumes time and effort, and cannot completely collect all the dirt.

[0004] Although there are some improvement schemes in the prior art, such as the patent CN201420189691U proposes a Y-type filter with back flushing function, but its core is to modify the structure of the filter body, which is high in cost and cannot be adapted to the large number of conventional Y-type filters that have been installed and used. Therefore, there is an urgent need for an external cleaning device which can be adapted to existing equipment, is safe to operate, has no leakage risk and is high in efficiency. SUMMARY

[0005] In order to overcome the above-mentioned defects in the prior art, the present application provides an external air conditioning system pipeline cleaning device. The device aims to provide a safe, clean and efficient online cleaning solution, and its technical scheme is that a portable tool integrating sealing, opening, collecting, blowdown and auxiliary cleaning functions is used to realize quick and reliable docking with the blowdown port of the filter, and all operations of opening the top cover, collecting and discharging the dirt are completed in a completely closed process, so as to fundamentally eliminate the spraying of sewage.

[0006] An external air conditioning system pipeline cleaning device, characterized in that: it comprises a variable-diameter sealing mechanism, a filter cover screwing part, a connecting pipe and a dirt storage bin which are connected in sequence.

[0007] The variable-diameter sealing mechanism is internally provided with an annular air bag, and a gas supply port is arranged through the variable-diameter sealing mechanism corresponding to the annular air bag. The annular air bag is inflated or deflated by inflating or releasing gas from an external miniature air pump or an external gas source, so as to tightly fit and seal the outer edge of the Y-shaped filter blowdown port of different specifications and different corrosion degrees. The filter cover screwing part is arranged behind the variable-diameter sealing mechanism, and an internal screwing buckle matched with the specification of the target filter blowdown end cover is arranged in the filter cover screwing part. An operator drives the internal screwing buckle to rotate synchronously by rotating the hand wheel or wrench interface outside the rotating device, so as to loosen and remove the end cover of the filter in a closed environment.

[0008] The connecting pipe is fixed on the filter cover screwing part and includes a rigid connecting pipe and a semi-rigid connecting pipe. The rigid connecting pipe and the semi-rigid connecting pipe are connected through a rotating connecting piece. The semi-rigid connecting pipe is connected with the sewage storage bin.

[0009] The rigid connecting pipe is provided with a backflushing gas source interface. When the sewage is too viscous, compressed air can be connected to the interface to perform a short backflushing to the inside of the filter, so as to loosen and fall off the accumulated sewage on the filter screen. The sewage storage bin is a box body made of transparent material, which is used for temporarily storing the sewage and impurities discharged from the filter. The cylinder wall of the sewage storage bin is marked with a volume scale, and is integrated with a high liquid level electronic sensor. When the sewage liquid surface reaches a set height, an alarm is triggered. An auxiliary cleaning interface is arranged on the upper part of the side wall of the sewage storage bin. The auxiliary cleaning interface is a reserved port with a sealing cover, and solid disinfecting tablets or slow-release cleaning agents can be put into the auxiliary cleaning interface before cleaning to realize instant mixing during the sewage inflow, so as to simply disinfect or chemically clean the filter box body and pipeline. The sewage storage bin is connected with a blowdown pipe, which includes a conventional drain pipe and an emergency drain pipe. The conventional drain pipe is connected to the bottom of the sewage storage bin and is provided with a one-way check valve. One end of the one-way check valve is connected to a safe drainage point through a hose. The emergency drain pipe is connected to the sewage storage bin at an intermediate height position and is connected with the outlet of the conventional drain pipe. A normally closed electromagnetic switch valve is arranged on the pipeline. The one-way check valve prevents the backflow of sewage or odor. The electromagnetic switch valve is electrically connected with the liquid level sensor of the sewage storage bin. When the alarm is triggered, the electromagnetic valve is automatically opened to realize automatic discharge of the sewage. The opening and closing of the electromagnetic switch valve can also be manually controlled after the sewage is cleaned.

[0010] Further, the material of the annular air bag is fluororubber, and the inflation pressure of the annular air bag is adjusted in the range of 0.2-0.4 MPa. The blowdown port diameter range adapted is φ20-φ120 mm.

[0011] Further, the filter cover screwing part further includes a power-assisted handle. The power-assisted handle is driven in a manual, electric or pneumatic manner. The power-assisted handle is connected with the screwing structure main body. The screwing buckle is a driving buckle or a hexagonal sleeve, which is a detachable structure.

[0012] Further, the liquid level sensor is connected with the controller and the alarm, the liquid level sensor is installed at the preset high liquid level position inside the sewage storage bin, the liquid level sensor is electrically connected with the controller, and the controller is electrically connected with the alarm and the electromagnetic switch valve respectively; when the liquid level sensor detects that the sewage liquid level reaches the preset value, the controller triggers the alarm and controls the normally closed electromagnetic switch valve in the emergency drain pipe to open.

[0013] Further, the alarm is an audible and visual alarm, the controller is provided with a delay module, the electromagnetic switch valve is closed after being opened for 15-30 seconds when the liquid level is lower than the preset value, and if the liquid level is higher than the preset high liquid level again during the delay period, the controller controls the electromagnetic switch valve to continuously open until the liquid level is lower than the preset value.

[0014] Further, the semi-rigid connecting structure is a telescopic structure, and the telescopic range is 200-400 mm; and the connecting pipe and the variable-diameter sealing port and the sewage storage bin are all connected in a buckle type detachable manner.

[0015] Further, the sewage storage bin is made of transparent polycarbonate, and the precision of the scale is 0.5 L; and the main structure of the sewage storage bin is further provided with a pressure gauge or a differential pressure sensor interface, which is used for sensing the pressure state in the filter after being connected, and judging whether the system has been safely relieved.

[0016] Compared with the prior art, the present application has the following remarkable beneficial effects:

[0017] 1. The variable-diameter air bag realizes reliable sealing with the filter sewage outlet, the whole sewage discharge process is closed in the device, the safety hidden danger that the construction personnel slips and is corroded by sewage is reduced, and the operation safety risk is greatly reduced.

[0018] 2. The sewage and solid sewage are collected and discharged in a directional manner, the secondary pollution of the environment caused by the sewage cleaning operation is eliminated, and the cleanliness of the sewage cleaning work site is ensured.

[0019] 3. The filter cover screwing part realizes quick unscrewing of the filter cover through the internal buckle structure, cooperates with the power handle, does not need manual direct contact with the filter cover, is easy to operate, reduces the labor intensity, the connecting pipe is provided with an external air source interface, viscous sewage can be cleaned by back blowing, and the sewage cleaning efficiency and effect are improved.

[0020] 4. The sewage storage bin adopts a transparent scale structure, the sewage storage amount can be observed in real time, the high liquid level alarm is linked with the electromagnetic switch valve, intelligent sewage discharge is realized, manual real-time monitoring of sewage discharge is not needed, a medicament adding interface is reserved on the side of the sewage storage bin, disinfection tablets or slow-release cleaning agents can be added, the peculiar smell and bacteria breeding of the sewage are reduced, and the on-site environment is further optimized.

[0021] 5. The one-way check structure on the sewage discharge hose can effectively prevent sewage backflow and ensure the stability of the sewage cleaning process; the components are detachably connected in a buckle type, the connecting pipe is telescopic, suitable for different installation spaces, and the device has high versatility and maintenance convenience. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is a schematic diagram of the main view of the present application;

[0024] Figure 3 is a schematic diagram of the filter cap screwing body structure of the present application;

[0025] Figure 4 is a schematic diagram of the screwing buckle of the present application Figure I ;

[0026] Figure 5 is a schematic diagram of the screwing buckle of the present application Figure II ;

[0027] Figure 6 is a schematic diagram of the internal structure of the rotating connecting piece;

[0028] In the figure, 1: variable diameter sealing mechanism, 11: annular sleeve, 12: annular air bag, 13: air supply port; 2: filter cap screwing structure, 21: filter cap screwing body, 22: screwing buckle; 3: connecting pipe, 31: rigid connecting pipe, 32: semi-rigid connecting pipe, 33: backflushing gas source interface, 34: rotating connecting piece, 341: upper connecting nut, 342: lower connecting nut, 343: outer sealing pipe, 344: inner sealing pipe, 345: axial sealing ring; 4: sewage storage bin, 41: storage bin body, 42: high liquid level alarm, 43: auxiliary cleaning interface; 5: sewage discharge pipe, 51: conventional drain pipe, 52: emergency drain pipe. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present application clearer and more apparent, the present application will be further described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0030] Example 1: An external air conditioning system pipeline sewage cleaning device is connected with the Y-type filter sewage cleaning port of the air conditioning system, and the present application is adapted to the sewage discharge port diameter range of φ20-φ120mm;

[0031] As shown in Figure 1 , the external air conditioning system pipeline sewage cleaning device comprises a variable diameter sealing structure 1, a filter cap screwing structure 2, a connecting pipe 3, a sewage storage bin 4 and a sewage discharge pipe 5 connected in sequence.

[0032] The variable-diameter sealing structure 1 comprises a ring-shaped sleeve 11, and a ring-shaped air bag 12 is arranged inside the ring-shaped sleeve 11, wherein the material of the ring-shaped air bag 12 is selected from fluororubber and is provided with an inflation interface, gas is filled into or released from the ring-shaped air bag through an external miniature air pump or an external gas source, the inflation pressure is adjusted in a range of 0.2-0.4 Mpa, and the ring-shaped air bag is expanded or contracted, so as to tightly fit and seal the outer edge of the Y-shaped filter blowdown port with different specifications and different corrosion degrees.

[0033] The filter cover screwing part 2 is arranged behind the variable-diameter sealing mechanism 1, the filter cover screwing part 2 is internally provided with a screwing buckle 22 matched with the specification of the target filter blowdown end cover, and an operator drives the internal screwing buckle 22 to rotate synchronously through a hand wheel or a wrench interface outside the rotating device, so that the end cover of the filter is loosened and removed in a closed environment.

[0034] The screwing buckle 22 is a replaceable structure, in actual implementation cases, the screwing buckle 22 is a driving buckle or an internal hexagonal sleeve, in the embodiment, a filter cover screwing body 21 is arranged, the filter cover screwing body 21 is in a cylindrical structure and is connected to the variable-diameter sealing structure 1 and the connecting pipe 3, a non-rotating body groove or hole is arranged in the filter cover screwing body 21, and a screwing buckle 22 is fixedly inserted into the groove or hole, the screwing buckle 22 is provided with an internal hexagonal through hole, as an equivalent structure, the screwing buckle 22 can also be a driving buckle with two symmetrical sides similar to a wrench opening (refer to Figure 5 ). The filter cover screwing body 21 can also be fixedly connected with a power-assisted handle outside or directly made into a hexagonal structure, or a wrench force surface is processed through cutting, the length of the power-assisted handle or the external wrench is 120 mm, force is applied to the filter cover screwing part 2 outside, and then the Y-shaped filter blowdown port is disassembled.

[0035] The connecting pipe 3 comprises a rigid connecting pipe 31 and a semi-rigid connecting pipe 32, the rigid connecting pipe 31 is arranged above, the semi-rigid connecting pipe 32 is arranged below, and the two are connected through a rotating connecting piece 34, the rotating connecting piece 34 is composed of an upper connecting nut 341, a lower connecting nut 342, an outer sealing pipe 343, an inner sealing pipe 344 and an axial sealing ring 345, the upper connecting nut 341 is connected with the outer sealing pipe 343, the lower connecting nut 342 is connected with the inner sealing pipe 344, a plurality of sealing rings and the axial sealing ring 345 are arranged between the outer sealing pipe 343 and the inner sealing pipe 344, through the above structure, the rotating function of the rotating connecting piece 34 can be realized, and the sealing function can also be realized.

[0036] The semi-rigid connecting pipe 32 is an optional telescopic bellows with a telescopic range of 200-400 mm. The connecting pipe 3 is detachably connected to the variable-diameter sealing structure 1 and the sewage storage bin 4 by buckling. A backflush gas source interface 33 is reserved on the rigid connecting pipe 31 in the connecting pipe 3. When the sewage is too viscous, compressed air can be connected to the interface to perform short-term backflush to the Y-shaped filter to loosen and remove the accumulated sewage on the filter screen.

[0037] The sewage storage bin 4 is made of transparent polycarbonate and is provided with a capacity scale on the side surface. A liquid level sensor 42 is installed in the bin. A controller and an audible and visual alarm are installed outside the liquid level sensor 42. The alarm is triggered when the sewage level reaches a set height. An auxiliary cleaning interface 43 is reserved on the upper side of the bin. The interface is provided with a sealing cover. Solid disinfectant tablets or slow-release cleaning agents can be put into the interface before sewage cleaning to achieve instant mixing during sewage inflow, thereby achieving simple disinfection or chemical cleaning of the filter box and pipeline. A sewage discharge pipe made of rubber is connected to the end of the sewage storage bin 5. The pipe has a diameter of φ25 mm and includes a conventional drain pipe 51 and an emergency drain pipe 52. The conventional drain pipe 51 is connected to the bottom of the sewage storage bin 5 and is provided with a one-way check valve above to prevent backflow of sewage or odor. The emergency drain pipe 51 is connected to the intermediate height position of the sewage storage bin 5 and is provided with a normally closed electromagnetic on-off valve (rated working pressure 0.1-1.0 MPa) above. The liquid level sensor 42, the audible and visual alarm, and the normally closed electromagnetic on-off valve are electrically connected to an external PLC controller. The PLC controller is provided with a delay module with a delay time of 30 s. The electromagnetic on-off valve is electrically connected to the liquid level sensor 42 of the sewage storage bin 5. When the alarm is triggered, the electromagnetic on-off valve is automatically opened to automatically discharge the sewage. The valve can also be manually controlled after sewage cleaning.

[0038] The working process of the embodiment is as follows:

[0039] (1) Preparation before sewage cleaning: Align the variable-diameter sealing structure 1 with the sewage cleaning port of the Y-shaped filter. Inject gas into the annular air bag 12 through the inflation interface to make the air bag expand and tightly seal with the sewage cleaning port. Adjust the length of the connecting pipe 2 according to the installation space to ensure stable installation of the device.

[0040] (2) Open the filter cover: Rotate the power handle of the filter cover screw structure 2 to make the internal screw buckle 22 connected with the filter cover. Continue to rotate the handle to open the filter cover. The sewage and sewage in the air conditioner pipeline flow into the sewage storage bin 4 through the connecting pipe 3.

[0041] (3) Monitoring of the cleaning process: the level of the sewage is observed through the transparent structure and scale of the sewage storage bin 4. If the viscous sewage in the pipeline is not easy to flow, connect the air supply equipment (air compressor) to the backflush gas source interface 33 of the rigid connecting pipe 31 in the connecting pipe 3, and blow in high-pressure gas to assist the viscous sewage to flow into the sewage storage bin 4. If it is necessary to disinfect the sewage, open the medicament adding interface on the side of the sewage storage bin 4, put in a disinfecting tablet, and then close the sealing cover;

[0042] (4) Intelligent sewage discharge: when the level of the sewage in the sewage storage bin 4 reaches the preset high level of the liquid level sensor 42, the liquid level sensor transmits a signal to the controller, the controller triggers the audible and light alarm to alarm, and controls the normally closed electromagnetic switch valve to open to discharge the sewage in the sewage storage bin 4. After the normally closed electromagnetic switch valve is opened for 30 seconds, if the liquid level sensor detects that the liquid level is still at the high level, the PLC controller controls the electromagnetic switch valve to be continuously opened until the liquid level is lower than the preset high level, and the PLC controller controls the electromagnetic switch valve to be closed;

[0043] (5) Completion of the cleaning: after the sewage in the sewage storage bin 4 is completely discharged, the filter cover is installed back to the original position by reversing the filter cover cover screw structure 2, the gas in the annular air bag 12 is released, the device is removed, and the cleaning operation is completed.

Claims

1. An external air conditioning system pipeline cleaning device, characterized in that: It includes a variable diameter sealing mechanism, a filter cover screwing part, a connecting pipe, and a sludge storage tank connected in sequence; The variable diameter sealing mechanism has an annular air bladder inside, and an air supply port is provided through the variable diameter sealing mechanism corresponding to the annular air bladder. The filter cover screwing part is located after the variable diameter sealing mechanism, and a screwing buckle is provided inside the filter cover screwing part. The connecting pipe is fixed on the filter cover screwing part and includes a rigid connecting pipe and a semi-rigid connecting pipe. The rigid connecting pipe and the semi-rigid connecting pipe are connected by a rotating connector. The rotating connector consists of an upper connecting nut, a lower connecting nut, an outer sealing pipe, an inner sealing pipe, and an axial sealing ring. The upper connecting nut is connected to the outer sealing pipe, and the lower connecting nut is connected to the inner sealing pipe. Several sealing rings and an axial sealing ring are provided between the outer sealing pipe and the inner sealing pipe, which can realize the rotation function of the rotating connector and also realize the sealing function. The semi-rigid connecting pipe is connected to the sludge storage tank. The rigid connecting pipe is provided with a backflushing air source interface. The sludge storage tank is a transparent box with volume scales marked on its cylindrical wall and an integrated high liquid level electronic sensor. An auxiliary cleaning interface is provided on the upper side wall of the sludge storage tank.

2. The external air conditioning system pipeline cleaning device according to claim 1, characterized in that: The sludge storage tank is connected to a drain pipe, which consists of a regular drain pipe and an emergency drain pipe. The regular drain pipe is connected to the bottom of the sludge storage tank and is equipped with a one-way check valve. One end of the regular drain pipe is connected to a safe drainage point via a flexible hose. The emergency drain pipe is connected to the outlet of the regular drain pipe at the middle height of the sludge storage tank and is equipped with a normally closed solenoid valve. The one-way check valve prevents backflow of sewage or odors. The solenoid valve is electrically connected to the liquid level sensor of the sludge storage tank. When an alarm is triggered, the solenoid valve automatically opens to achieve automatic sewage discharge. After cleaning, the valve can also be manually controlled.

3. The external air conditioning system pipeline cleaning device according to claim 1, characterized in that: The annular airbag is made of fluororubber, and its inflation pressure is adjustable from 0.2 to 0.4 MPa, with a suitable discharge outlet diameter of φ20 to φ120 mm.

4. The external air conditioning system pipeline cleaning device according to claim 2, characterized in that: The liquid level sensor is connected to the controller and the alarm. The liquid level sensor is installed at a preset high liquid level position inside the sludge storage tank. The liquid level sensor is electrically connected to the controller. The controller is electrically connected to the alarm and the solenoid valve respectively. When the liquid level sensor detects that the sludge level has reached the preset value, the controller triggers the alarm and controls the normally closed solenoid valve in the emergency drainage pipe to open.

5. The external air conditioning system pipeline cleaning device according to claim 1, characterized in that: The alarm is an audible and visual alarm. The controller has a built-in delay module. After the electromagnetic switch valve is opened, it will close after a delay of 15 to 30 seconds when the liquid level is lower than the preset value. If the liquid level is higher than the preset high liquid level again during the delay period, the controller will control the electromagnetic switch valve to continue to open until the liquid level is lower than the preset value.

6. The external air conditioning system pipeline cleaning device according to claim 1, characterized in that: The semi-rigid connection structure is a telescopic structure with a telescopic range of 200-400mm. The connection between the connecting pipe and the variable diameter sealing port and the sludge storage tank is a snap-fit ​​detachable connection.

7. The external air conditioning system pipeline cleaning device according to claim 1, characterized in that: The sludge storage tank is made of transparent polycarbonate, and the scale accuracy is 0.5L. The main structure of the sludge storage tank is also equipped with a pressure gauge or differential pressure sensor interface, which is used to sense the pressure status inside the filter after connection and to determine whether the system has been safely depressurized.

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