CN209875263U - Compressed air filter - Google Patents

Abstract

The utility model provides a compressed air filter, include the filter head, strain a section of thick bamboo, lasso, the fixed bucket of filter core, filter core and gland nut, it is in the below of filter head to strain a section of thick bamboo fixed connection, the filter core is fixed the bucket through lasso fixed connection and is strained the inboard in a section of thick bamboo, the filter core passes through gland nut fixed connection in the interior below of the fixed bucket of filter core, the both ends of filter head are equipped with air inlet and gas outlet, compressed air filter still includes quick connector, air inlet and gas outlet department are pegged graft respectively and are had quick connector, and the trachea is inserted soon with quick connector, is unloaded and is connected. The quick connector of the utility model is installed on the filter head through the screw thread, and the installation can be completed only by inserting the air pipe into the quick connector and inserting the air pipe to the bottom, the connection is reliable, and the air tightness is good; when the air pipe is pulled out, the button on the quick-connection connector is pressed, the air pipe can be pulled out, and the quick assembly and the quick disassembly of the air pipe are realized.

Description

Compressed air filter

Technical Field

The utility model relates to a diesel engine tail gas treatment facility, concretely relates to compressed air filter.

Background

At present, various technologies for after-treatment of diesel exhaust have been proposed and under development, among which oxidation catalyst (DOC), particulate filter (DPF), NO_XThe Selective Catalytic Reduction (SCR) technology is expected to be practical. Selective Catalytic Reduction (SCR) process, which enables NO in the exhaust gas_XEffectively inhibit oxidation reaction while being accelerated to reduce, and enable NO to be reduced on the premise of not reducing the efficiency of an engine_XThe conversion rate reaches 90%, and the method has the advantages of better fuel economy, high sulfur resistance and the like. In order to meet the Euro IV and Euro V emission standards, the SCR technology becomes the preferred NO for medium and heavy diesel engine enterprises_XThe purification scheme is increasingly accepted as diesel engine tail gas NO_XThe main stream of post-processing applies.

The SCR tail gas post-treatment system mainly comprises a catalyst, a urea box, a urea supply unit, a urea nozzle, a nitrogen oxide sensor, an exhaust temperature sensor, an environment temperature sensor, a pressure difference sensor, a ray spraying pipeline, a compressed air tank, a compressed air filter and the like. The compressed air tank is used for providing compressed air for the dosing unit. Compressed air enters a quantitative feeding unit after being filtered by an air filter, and the quantitative feeding unit is a core unit of the SCR tail gas aftertreatment system and is also a high-precision element. The microprocessor of the device is controlled by an engine electronic control unit ECM and is used for spraying the urine toxicity amount matched with the nitrogen oxide generated by the running working condition of the engine into the exhaust pipe. When the feeding works, the electric pump in the feeding machine sucks urea solution with required quantity from the urea box according to an instruction received by the microprocessor, and the urea solution is mixed with compressed air and atomized to enter the injection pipeline. In order to ensure its proper operation, the unit also has self-degassing and self-cleaning functions. I.e. before each operation, the electric pump sucks urea solution from the urea tank at a maximum operating flow rate and returns it via the return line to remove the effect on the metering accuracy of air possibly present in the line, a process known as degassing. After the electric pump stops working, the compressed air is continuously supplied until the urea solution in the pipeline is blown off, so that urea is prevented from remaining in the pipeline and crystallizing and blocking the pipeline, and the process is called a cleaning process. Two pipelines are connected between the dosing unit and the urea box, namely a supply pipe and a return pipe. The supply pipe is used for supplying urea solution in the feeding and degassing process. The return pipe is mainly used for returning the urea solution in the degassing process.

The compressed air filter is applied to a diesel engine aftertreatment system to eliminate impurities in media so as to protect normal use of equipment and reduce equipment maintenance cost. When compressed air enters the filter with the filter element, impurities are blocked by the filter element, clean air is discharged from the outlet of the filter, when maintenance is needed, the power supply needs to be closed, the blowoff valve is opened after pressure is released, pollutants in the filter barrel can be discharged, when the filter element is replaced, the filter cylinder only needs to be disassembled, taken out, replaced and then fastened again.

The structure of the existing compressed air filter is shown in figures 1 and 2, and comprises a filter head 1-1, a sealing ring 1-2, an air inlet and outlet connector 1-3, a sealing ring 1-4, a filter cartridge 1-5, a ferrule 1-6, a filter element fixing barrel 1-7, a filter element 1-8, a compression nut 1-9, a blow-off valve 1-10, a blow-off valve screwing barrel 1-11, a sealing ring 1-12, a locking nut 1-13, a protective cap 1-14, a dust cap 1-15 and a retaining nut 1-16, wherein an air inlet and an air outlet are arranged at two ends of the filter head 1-1, the air inlet and outlet connector 1-3 comprises an air inlet connector and an air outlet connector which are respectively fixed and inserted in the air inlet and the air outlet, the filter cartridge 1-5 is arranged below the filter head 1-1, the filter element fixing barrel 1-7 is fixedly arranged on the inner side of the filter cylinder 1-5 through a ferrule 1-6, the filter element 1-8 is fixedly arranged in the filter element fixing barrel 1-7 through a compression nut 1-9, the lower end of the filter cylinder 1-5 is provided with a sewage discharge outlet, a sewage discharge device is arranged at the sewage discharge outlet and comprises a sewage discharge valve 1-10, a sewage discharge valve screwing barrel 1-11, a sealing ring 1-12, a locking nut 1-13 and a protective cap 1-14, the inlet of the air inlet joint and the outlet of the air outlet joint are respectively provided with a dustproof cap 1-15 and a retaining nut 1-16, and the air inlet pipe and the air outlet pipe are respectively fixedly inserted in the air inlet joint and the air outlet joint through the retaining nuts 1-16. Therefore, when the air inlet pipe and the air outlet pipe are installed in the existing compressed air filter, the air pipe needs to be inserted into the air inlet and outlet joint 1-3 to the bottom, the fastening nut is tightened after the air pipe and the air inlet and outlet joint are sealed, so as to fix the air inlet pipe and the air outlet pipe, and vice versa when the air inlet pipe and the air outlet pipe are disassembled. The prior compressed air filter has the following problems: the connecting and mounting of the connecting pipes are inconvenient, and the height of accumulated water in the filter cylinder is inconvenient to observe due to the absence of the liquid level pipe.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compressed air filter is guaranteeing under the compressed air filter function, has improved the structure of filter, has made things convenient for the connection installation that the customer was taken over to increased the liquid level pipe, conveniently observed the height of ponding in the lauter tub, convenient maintenance.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a compressed air filter, includes the filter head, strains a section of thick bamboo, lasso, filter core fixed bucket, filter core and gland nut, strain a section of thick bamboo fixed connection in the below of filter head, the filter core fixed bucket is inboard through lasso fixed connection in straining a section of thick bamboo, the filter core passes through gland nut fixed connection in the interior below of filter core fixed bucket, the both ends of filter head are equipped with air inlet and gas outlet, compressed air filter still includes quick connector, air inlet and gas outlet department peg graft respectively and have quick connector, and the trachea is inserted, is dismantled soon with quick connector and is connected.

The quick connector comprises a connector body, an O-shaped ring, a special sealing element, a fixing ring, a zinc sleeve, a button and a reed, wherein one end of the connector body is inserted into the end of the filter head, the other end of the connector body extends out of the end of the filter head, the O-shaped ring is sleeved on the outer side of the end of the filter head, the zinc sleeve is embedded on the inner side of the end of the filter head, the fixing ring and the special sealing element are sequentially sleeved on one side, close to the end of the filter head, of the zinc sleeve and the inner side of the connector body, the reed is fixed on the inner side of the connector body through the fixing ring and the zinc sleeve, the button is inserted on the inner side of the zinc sleeve and is in limiting connection with the zinc sleeve through a step at the end.

The side of straining a section of thick bamboo is equipped with the observation window, the observation window includes liquid level pipe fixing base and liquid level pipe, the lateral wall integrated into one piece of liquid level pipe fixing base and a section of thick bamboo, set up the ponding via hole that a section of thick bamboo inner chamber and liquid level intraductal pipe were strained in the intercommunication on the section of thick bamboo lateral wall of liquid level pipe side top, the through-hole has been seted up to the lower extreme of liquid level pipe fixing base, the lower extreme of liquid level pipe is through the liquid level end cap bolt shutoff.

Preferably, the liquid level pipe is a conical columnar structure, and the inner diameter of the inner pipe of the liquid level pipe is gradually increased from top to bottom.

The outer side of the upper end of the filter cylinder is connected with the filter head in a sealing mode through a sealing ring.

The bottom of the filter cylinder is provided with a drain outlet, the drain outlet is provided with a drain valve screwing cylinder, the upper end of the drain valve screwing cylinder is provided with a drain valve, the lower end of the drain valve screwing cylinder is connected with a locking nut, and the drain valve screwing cylinder is connected with the drain outlet in a sealing mode through a sealing ring.

The filter head mounting filter cylinder is characterized in that a notch is formed in the position of a filter head mounting filter cylinder orifice at the lower end of the filter head, a locking block is arranged on the outer side of the upper end of the filter cylinder, and the locking block is clamped with the notch when the upper end of the filter cylinder is inserted into the filter head mounting filter cylinder orifice.

The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:

1. the quick connector of the utility model is installed on the filter head through the screw thread, and the installation can be completed only by inserting the air pipe into the quick connector and inserting the air pipe to the bottom, the connection is reliable, and the air tightness is good; when the air pipe is pulled out, the button on the quick-connection connector is pressed, the air pipe can be pulled out, and the quick assembly and the quick disassembly of the air pipe are realized.

2. The utility model discloses an installation is strained drill way department on filter head and is equipped with the breach, strains corresponding cooperation department of a section of thick bamboo and is equipped with the locking piece, strains the breach that the locking piece on the section of thick bamboo inserted on the filter head during installation and assembles on the earth, and the rotation is strained a section of thick bamboo, and the locking piece gets into breach department locking and strains a section of thick bamboo.

3. The utility model discloses side of straining a section of thick bamboo is equipped with the liquid level pipe, just can judge the height of straining a section of thick bamboo inside ponding through the height of observing the intraductal ponding of liquid level, and convenient the maintenance.

4. The utility model discloses a strain a section of thick bamboo stack shell and strain a section of thick bamboo bottom and adopt the circular arc transition, increased intensity.

Drawings

FIG. 1 is a front view of a prior art compressed air filter of the present invention;

fig. 2 is a cross-sectional view of a prior art compressed air filter of the present invention.

Reference numerals:

1-1, a filter head; 1-2, sealing rings; 1-3, an air inlet and outlet joint; 1-4, sealing rings; 1-5, filter cartridge; 1-6, a ferrule; 1-7, a filter element fixing barrel; 1-8, a filter element; 1-9, a compression nut; 1-10 parts of a drain valve; 1-11, screwing a drain valve into the barrel; 1-12, sealing ring; 1-13, locking a nut; 1-14, protective caps; 1-15, dust cap; 1-16, pressing a nut;

FIG. 3 is a front view of the present invention;

fig. 4 is a cross-sectional view of the present invention;

FIG. 5 is an enlarged view of the filter cartridge of the present invention;

FIG. 6 is a front view of the filter head of the present invention;

FIG. 7 is a left side view of the middle filter head of the present invention;

FIG. 8 is a front view of the quick connector of the present invention;

fig. 9 is a left side view of the middle quick connector of the present invention;

FIG. 10 is an enlarged view of the liquid level tube of the present invention;

fig. 11 is an enlarged view of a cross-sectional view of the middle liquid level tube of the present invention.

Reference numerals:

1. a filter head; 2. a quick connector; 201. a fitting body; 202. an O-shaped ring; 203. a dedicated seal; 204. a fixing ring; 205. a zinc sheath; 206. a button; 207. a reed; 3. a seal ring; 4. a filter cartridge; 400. a liquid level pipe fixing seat; 401. water accumulation and hole passing; 5. a ferrule; 6. a filter element fixing barrel; 7. a filter element; 8. a compression nut; 9. a blowoff valve; 10. the drain valve is screwed into the cylinder; 11. a seal ring; 12. locking the nut; 13. a liquid level plug bolt; 14. a seal ring; 15. a liquid level pipe.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The utility model discloses to the problem that wastes time and energy when current compressed air filter installation trachea, provide a compressed air filter.

As shown in fig. 3 and 4, the embodiment of the present invention provides a compressed air filter, which includes a filter head 1, a filter cartridge 4, a ferrule 5, a filter cartridge fixing barrel 6, a filter cartridge 7 and a gland nut 8, wherein the filter cartridge 4 is fixedly connected below the filter head 1, and the outer side of the upper end of the filter cartridge 4 is hermetically connected with the filter head 1 through a sealing ring 3.

In this embodiment, a notch is formed in a filter head mounting filter cylinder orifice at the lower end of the filter head 1, a locking block is arranged on the outer side of the upper end of the filter cylinder 4, and when the upper end of the filter cylinder 4 is inserted into the filter head mounting filter cylinder orifice, the locking block is clamped with the notch. Therefore, the filter cartridge is connected to the lower part of the filter head in a snap-fit manner and is provided with a locking and anti-dropping device, so that the filter head and the filter cartridge are quickly installed, and the structure of the filter head and the filter cartridge is shown in figures 5-7.

The filter element fixing barrel 6 is fixedly connected to the inner side of the filter barrel 4 through a ferrule 5, the filter element 7 is fixedly connected to the inner lower portion of the filter element fixing barrel 6 through a compression nut 8, air inlets and air outlets are formed in two ends of the filter head 1, the compressed air filter further comprises a quick plug connector 2, the air inlets and the air outlets are respectively plugged with the quick plug connectors 2, and the air pipe and the quick plug connectors 2 are quickly plugged and quickly detached.

As shown in fig. 8 and 9, the quick connector 2 includes a connector body 201, an O-ring 202, a special sealing member 203, a fixing ring 204, a zinc sleeve 205, a button 206 and a spring plate 207, one end of the connector body 201 is inserted into the filter head 1 as an insertion end, the other end of the connector body extends out of the filter head 1 as an extension end, the O-ring 202 is sleeved outside the insertion end, the zinc sleeve 205 is embedded inside the extension end, the fixing ring 204 and the special sealing member 203 are sequentially sleeved on one side of the zinc sleeve 205 close to the insertion end and inside of the connector body 201, the spring plate 207 is fixed inside the connector body 201 through the fixing ring 204 and the zinc sleeve 206, the button 206 is inserted inside the zinc sleeve 206 and is in limited connection with the zinc sleeve 205 through a step at the end, the air pipe is quickly inserted into the connector body 201 through the spring plate 207, and quick disconnection from the connector body 201 is realized through the button 206.

The quick connector 2 in this embodiment is installed on the filter head 1 through threads, the quick connector 1 adopts a split design, the pressing function is executed by the button 206, the locking function is ensured by the stainless steel reed 207 subjected to heat treatment, the reed 207 is fixed in the connector body 201 through the fixing ring 204 and the zinc sleeve 205, the button 206 and the zinc sleeve 205 are limited by a step, and the zinc sleeve 205 is screwed, turned over and tightly fixed by the connector body 201, thereby structurally ensuring that the quick connector cannot fall off. The sealing of the air pipe and the quick connector 2 is realized through the special sealing piece 203, the inner conical surface of the special sealing piece 203 is contacted with the air pipe after assembly, and under the condition that pressure exists, the special sealing piece 203 can generate inward compression force to ensure the sealing performance with the air pipe.

As shown in fig. 5, an observation window is arranged on the side of the filter cartridge 4, the observation window comprises a liquid level tube fixing seat 400 and a liquid level tube 15, the liquid level tube fixing seat 400 and the side wall of the filter cartridge 4 are integrally formed, a water accumulation through hole 401 for communicating the inner cavity of the filter cartridge 4 and the inner tube of the liquid level tube 15 is formed in the side wall of the filter cartridge 4 above the side of the liquid level tube 15, a through hole is formed in the lower end of the liquid level tube fixing seat 400, the lower end of the liquid level tube 15 is blocked by a liquid level plug bolt 13 penetrating through the through hole, and the liquid level plug bolt 13.

As shown in fig. 10 and 11, the liquid level pipe 15 is a tapered cylindrical structure, and the inner diameter of the inner pipe thereof gradually increases from top to bottom.

The bottom of the filter cylinder 4 is provided with a sewage draining outlet, the sewage draining outlet is provided with a sewage draining valve screwing cylinder 10, the upper end of the sewage draining valve screwing cylinder 10 is provided with a sewage draining valve 9, the lower end of the sewage draining valve screwing cylinder is connected with a locking nut 12, and the sewage draining valve screwing cylinder 10 is hermetically connected with the sewage draining outlet through a sealing ring 11.

The working principle in this embodiment is as follows: firstly, a filter element fixing barrel is arranged below a filter head through a ferrule, and then a filter element is arranged at the inner lower part of the filter element fixing barrel by utilizing a compression nut. After the filter element is installed, installing a filter cylinder and a filter head: the opening of the filter head for installing the filter cylinder is provided with a notch, when the filter head is installed, the locking block at the corresponding position of the filter cylinder is inserted into the notch and assembled to the bottom, the filter cylinder is rotated, and the locking block on the filter cylinder enters the notch to lock the filter cylinder, so that the installation is rapid.

After the filter cylinder is fixedly connected with the filter head, the quick-connection-peg is installed on the filter head through threads, the air pipe is inserted into the quick-connection-peg and is connected in place in an inserting mode, the air pipe and the quick-connection-peg are sealed through the special sealing piece, an inner conical surface of the special sealing piece is in contact with the air pipe after the assembly, and under the condition that pressure exists, the special sealing piece can generate inward compression force to guarantee sealing performance with the air pipe.

The gas enters from the gas pipe at the side of the gas inlet, flows through the gas inlet, the gap between the filter cartridge and the filter element fixing barrel, the filter element, the exhaust hole at the upper end of the filter element fixing barrel and the gas outlet in sequence, flows out from the gas pipe at the side of the gas outlet, and impurities in the gas can be filtered and left in the filter cartridge.

The side of straining a section of thick bamboo is equipped with the liquid level pipe, and it is intraductal to stay to the liquid level from the ponding via hole to strain ponding in the section of thick bamboo, and the height of the inside ponding of section of thick bamboo is strained in the height judgement of the intraductal ponding of accessible liquid level, convenient maintenance.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

In the description of the present invention, it is to be understood that the terms "upper", "one end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that the terms "provided with" and "connected" are to be interpreted broadly, unless explicitly stated or limited otherwise. For example, the connection can be fixed, detachable or integrated; may be directly connected or indirectly connected through an intermediate. The fixed connection can be common technical schemes such as welding, threaded connection and clamping. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. The utility model provides a compressed air filter, includes the filter head, strains a section of thick bamboo, lasso, filter core fixed bucket, filter core and gland nut, strain a section of thick bamboo fixed connection in the below of filter head, the filter core fixed bucket is inboard through lasso fixed connection in straining a section of thick bamboo, the filter core passes through gland nut fixed connection in the interior below of filter core fixed bucket, the both ends of filter head are equipped with air inlet and gas outlet, a serial communication port, compressed air filter still includes quick connector, air inlet and gas outlet department peg graft respectively and have quick connector, and the trachea is inserted, is dismantled soon with quick connector and is connected.

2. The compressed air filter as claimed in claim 1, wherein the quick connector comprises a connector body, an O-ring, a special sealing element, a fixing ring, a zinc sleeve, a button and a spring plate, one end of the connector body is inserted into the filter head as an insertion end, the other end of the connector body extends out of the filter head as an extension end, the O-ring is sleeved outside the insertion end, the zinc sleeve is embedded inside the extension end, the fixing ring and the special sealing element are sequentially sleeved on one side of the zinc sleeve close to the insertion end and inside the connector body, the spring plate is fixed inside the connector body through the fixing ring and the zinc sleeve, the button is inserted inside the zinc sleeve and is in limited connection with the zinc sleeve through a step at the end, the air pipe is quickly inserted and fixed in the connector body through the spring plate, and quick release from the connector body is realized through the button.

3. The compressed air filter as claimed in claim 1, wherein an observation window is provided at a side of the filter cartridge, the observation window comprises a liquid level tube fixing seat and a liquid level tube, the liquid level tube fixing seat and a side wall of the filter cartridge are integrally formed, a water accumulation through hole for communicating an inner cavity of the filter cartridge and an inner tube of the liquid level tube is provided on a side wall of the filter cartridge above a side of the liquid level tube, a through hole is provided at a lower end of the liquid level tube fixing seat, and a lower end of the liquid level tube is blocked by a liquid level plug bolt passing through the through hole.

4. The compressed air cleaner of claim 3, wherein the liquid level tube is a tapered cylindrical structure, and an inner diameter of the inner tube is gradually increased from top to bottom.

5. The compressed air cleaner of claim 1, wherein the filter cartridge is sealingly connected to the filter head at an outer side of the upper end thereof by a gasket.

6. The compressed air filter as claimed in claim 1, wherein a drain outlet is formed at the bottom of the filter cylinder, a drain valve screwing cylinder is arranged at the drain outlet, a drain valve is arranged at the upper end of the drain valve screwing cylinder, a locking nut is connected to the lower end of the drain valve screwing cylinder, and the drain valve screwing cylinder is hermetically connected with the drain outlet through a sealing ring.

7. The compressed air filter as claimed in claim 1, wherein a notch is formed at the filter head mounting filter cartridge hole at the lower end of the filter head, a locking block is arranged at the outer side of the upper end of the filter cartridge, and the locking block is clamped with the notch when the upper end of the filter cartridge is inserted into the filter head mounting filter cartridge hole.