CN209761920U

CN209761920U - Novel filter shell structure and novel filter

Info

Publication number: CN209761920U
Application number: CN201920417849.7U
Authority: CN
Inventors: 关祥龙; 杨丽霞; 余丽艳; 韩伟; 何树营; 佀国良
Original assignee: Shantui Chutian Construction Machinery Co Ltd
Current assignee: Shantui Chutian Construction Machinery Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2019-12-10
Anticipated expiration: 2029-03-29

Abstract

The utility model relates to a novel filter shell structure, strain a section of thick bamboo and install at the filter housing upper cover of straining a section of thick bamboo top including the casing, the casing is strained a section of thick bamboo and is divided the body structure with the filter housing upper cover, the filter housing upper cover is including apron and the valve block of installing on the apron upper surface, and the first end and the oil duct d of oil duct f are linked together, and the second end and the oil duct g of oil duct f are linked together, and the installing port of oil duct e for being used for installing the bypass valve, the installing port of oil duct d for being used for installing differential pressure signaling apparatus. The utility model also discloses a novel filter. The utility model discloses following beneficial effect has: the filter housing upper cover has adopted the two style structures of separation, and this patent is external on the valve block of filter housing upper cover with the bypass valve mounted position of filter to adopt screw thread cartridge formula bypass valve structrual installation simple reliable, replace the tradition and embed the package assembly in filter inside, be equipped with pressure differential signaling apparatus installing port simultaneously, be convenient for to the control of filter core in service behavior.

Description

Novel filter shell structure and novel filter

Technical Field

The utility model relates to a novel filter shell structure belongs to filter technical field.

Background

Hydraulic system failures are mostly caused by unsatisfactory cleanliness of the hydraulic system. The filter is an indispensable part for ensuring the normal and reliable operation of the hydraulic system. The filter bears the effect of stopping the inside and outside pollutants entering the hydraulic system in the operation process of the hydraulic system, and plays a decisive role in maintaining the cleanliness of the oil. The hydraulic filter is generally mainly composed of a filter element and a housing. The countless tiny gaps or small holes on the filter element form the flow area of the oil liquid, so when the size of impurities mixed in the oil liquid is larger than the tiny gaps or small holes, the impurities are blocked from being filtered out of the oil liquid. Meanwhile, in order to monitor the cleanliness of the hydraulic system, replace the filter element in time and prevent the damage of subsequent hydraulic parts due to air suction, a bypass valve and a differential pressure alarm device are added to the filter.

At present, most of the structures of the filter shell adopt casting structures (see figure 3), and the upper cover and the lower filter cartridge of the filter adopt castings. The filter upper cover structure with the functions of bypass and pressure difference alarm has the defects that the external structure and the internal structure are complex, a special manufacturing mold is required for processing, and sand holes and the like are easy to appear in casting. The oil inlet and outlet of the filter are arranged on a central line, a partition is arranged in the middle of the oil inlet and outlet, the bypass valve is usually arranged on the partition, and a long bolt is arranged on a bolt hole on the partition and compresses a compression spring and a spring compression valve seat to cover the oil inlet on the partition in the screwing-in process. Or a bolt penetrates through the partition, the spring and the valve seat are arranged on the other side of the partition, and at the moment, the nut is needed to be screwed on the bolt to compress the spring, and the spring covers the bypass oil port of the partition on the compression valve seat. After the bolt and the nut are installed, the bypass valve is located in the inner cavity of the oil duct, the space is limited, the assembling effect cannot be confirmed, namely the influence of the assembling process is great, the difference between the opening pressure of the bypass valve and a theoretical value is great, and the product consistency is poor. Meanwhile, the screw rod is in clearance fit when penetrating through the valve seat hole, namely before the bypass valve is not opened, the clearance can generate leakage, and the sealing performance is poor. After the structure of the casting of the upper cover of the filter is determined, the structure of the selectable differential pressure transmitter is determined, and the selection has limitation. If other types of pressure difference signal transmitters are selected, the manufacturing mold of the upper cover of the filter needs to be modified, and the modification cost is high.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: in order to solve one of the problems, a novel filter shell structure and a novel filter are provided.

The utility model discloses a novel filter shell structure, including the casing strain a section of thick bamboo and install the filter housing upper cover at straining a section of thick bamboo top, the casing is strained a section of thick bamboo and is divided structure with filter housing upper cover, filter housing upper cover is including apron and the valve block of installing on the apron upper surface, oil duct B, oil duct e, oil duct c, oil duct f, oil duct g and oil duct d have been seted up on the valve block, the apron is seted up oil duct B that is linked together with oil duct g and the oil duct a that is linked together with oil duct B, oil duct e, oil duct d, oil duct c, oil duct g are criss-cross and communicate with each other, the second end of oil duct a and oil duct B all is strained a section of thick bamboo with the casing and is linked together, the second end of oil duct e and oil duct d all is linked together with the external world, the second end of oil duct c is linked together, the second end of the oil passage B is an oil outlet, the oil passage e is a mounting port for mounting a bypass valve, and the oil passage d is a mounting port for mounting a differential pressure transmitter.

Preferably, the valve block and the cover plate are of a split structure, O-ring sealing grooves are formed in the connection position of the oil passage a and the oil passage B and the connection position of the oil passage B and the oil passage g, O-ring seals are mounted in the O-ring sealing grooves, and the O-ring sealing grooves are arranged on the lower surface of the valve block or the upper surface of the cover plate.

Preferably, the valve block and the cover plate are of an integral structure, the oil passage B and the oil passage g are formed into one oil passage, and the oil passage a and the oil passage B are formed into one oil passage.

preferably, a seat is installed at the second end of the oil port a, and the seat is in threaded connection with the oil port a; or the seat is welded on the cover plate, and the oil port a is communicated with the inner cavity of the filter element through the seat.

Preferably, the shell filter cylinder comprises a cylinder, the top of the cylinder is provided with a filter cylinder upper end plate, the bottom of the cylinder is provided with a bottom plate, one side of the cylinder is provided with an oil inlet seat communicated with the inner cavity of the cylinder, and the second end of the oil passage b is communicated with a cavity between the cylinder and the filter element.

Preferably, a sealing surface between the cover plate and the upper end plate of the filter cartridge is provided with a sealing O-shaped ring groove, an O-shaped ring seal is arranged in the O-shaped ring sealing groove, and the O-shaped ring sealing groove is formed in the lower surface of the cover plate (2) or the upper surface of the upper end plate of the filter cartridge.

The utility model also discloses a novel filter, including foretell novel filter housing structure, still include the filter core, external bypass valve and external pressure differential signaling device, the filter core is installed in the drum, the filter core is connected to the lower extreme of seat, the bypass valve adopts screw thread cartridge formula bypass valve, the bypass valve is installed in oil duct e, bypass valve front end sealing member II is located and cuts off oil duct g and oil duct c in the oil duct g, pressure differential signaling device installs in oil duct d, pressure differential signaling device front end sealing member I is located oil duct d, cut apart the cavity A that is linked together with oil duct f and the cavity B that is linked together with oil duct c with oil duct d, separate the disconnection with the fluid that comes from oil duct f in the oil duct d with the fluid in the oil duct c.

Preferably, a sealing ring is arranged between the seat and the filter element.

compared with the prior art, the utility model discloses following beneficial effect has:

1. Novel filter housing structure and novel filter, the filter housing upper cover has adopted separation two style structure, this patent is external with the bypass valve mounted position of filter to the valve block of filter housing upper cover to adopt screw thread cartridge formula bypass valve structrual installation simple reliable, replace the tradition to embed at the inside package assembly of filter, be equipped with pressure differential signaling apparatus installing port simultaneously, be convenient for to the control of filter core in service behavior. The upper cover of the filter shell adopts a machined part to replace the traditional integral casting structure, can adopt section bars and machine processing to finish corresponding manufacture, has low cost, greatly reduces the manufacture time, has simple structure of the oil duct, does not need a casting mould for manufacture, reduces the casting pollution, and can greatly reduce the manufacture time.

2. Novel filter shell structure and novel filter, external scheme is taken to the bypass valve, simple to operate, its performance does not receive the influence of assembly factor.

3. Novel filter shell structure and novel filter, adopt cartridge formula bypass check valve, let out leakage quantity and opening pressure dependable performance. The valve block can be suitable for bypass one-way valves and differential pressure signal transmitter structures in various forms, and has multiple selectivity.

Drawings

Fig. 1 is a schematic structural diagram of a novel filter housing structure according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of the novel filter according to an embodiment of the present invention;

Fig. 3 is a schematic structural view of a conventional filter housing.

In the figure: 1. the filter cartridge comprises a valve block 2, a cover plate 3, a filter cartridge upper end plate 4, a seat 5, a cylinder 6, a bottom plate 7, an oil inlet seat 8, a filter element 9, a bypass valve 10 and a differential pressure transmitter.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

The present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.

Examples

As shown in fig. 1-2, the novel filter housing structure comprises a housing filter cylinder and a filter housing upper cover mounted on the top of the filter cylinder, the housing filter cylinder and the filter housing upper cover are in a split structure, the filter housing upper cover comprises a cover plate 2 and a valve block 1 mounted on the upper surface of the cover plate 2, the valve block 1 is provided with an oil passage B, an oil passage e, an oil passage c, an oil passage f, an oil passage g and an oil passage d, the cover plate 2 is provided with an oil passage B communicated with the oil passage g and an oil passage a communicated with the oil passage B, the oil passages e, d, c and g are mutually crossed and communicated, the second ends of the oil passages a and B are communicated with the inner cavity of the housing filter cylinder, the second ends of the oil passages e and d are communicated with the outside, the second end of the oil passage c is communicated with the oil passage B, the first end of the oil passage f is communicated with the, the second end of the oil passage B is an oil outlet, the oil passage e is a mounting port for mounting a bypass valve, and the oil passage d is a mounting port for mounting a differential pressure transmitter.

In the embodiment, the valve block 1 and the cover plate 2 are of a split structure, the joint of the oil passage a and the oil passage B and the joint of the oil passage B and the oil passage g are provided with O-shaped ring sealing grooves, O-shaped ring seals are arranged in the O-shaped ring sealing grooves, and the O-shaped ring sealing grooves are arranged on the lower surface of the valve block 1 or the upper surface of the cover plate 2; a seat 4 is installed at the second end of the oil port a, and the seat 4 is in threaded connection with the oil port a; the shell filter cylinder comprises a cylinder 5, the top of the cylinder 5 is provided with a filter cylinder upper end plate 3, the bottom of the cylinder 5 is provided with a bottom plate 6, one side of the cylinder 5 is provided with an oil inlet seat 7 communicated with the inner cavity of the cylinder 5, and the second end of the oil duct b is communicated with a cavity between the cylinder 5 and the filter element (8); and a sealing surface between the cover plate 2 and the filter cartridge upper end plate 3 is provided with a sealing O-shaped ring groove, an O-shaped ring seal is arranged in the O-shaped ring sealing groove, and the O-shaped ring sealing groove is arranged on the lower surface of the cover plate (2) or the upper surface of the filter cartridge upper end plate 3.

the utility model also discloses a novel filter, including foretell novel filter shell structure, still include filter core 8, external bypass valve 9 and external pressure differential signaling apparatus 10, filter core 8 installs in drum 5, filter core 8 is connected to the lower extreme of seat 4, bypass valve 9 adopts screw thread cartridge formula bypass valve, bypass valve 9 installs in oil duct e, bypass valve 9 front end sealing member II is located oil duct g and cuts off oil duct g and oil duct c, pressure differential signaling apparatus 10 installs in oil duct d, pressure differential signaling apparatus 10 front end sealing member I is located oil duct d, divide oil duct d into cavity A that is linked together with oil duct f and cavity B that is linked together with oil duct c, separate the fluid that comes from oil duct f in the oil duct d with the fluid in the oil duct c and break off; and a sealing ring is arranged between the seat 4 and the filter element 8.

The working principle of the specific embodiment is as follows: as shown in fig. 2, the threaded differential pressure transmitter is in the form of M high-pressure port and N low-pressure port, and the valve block 1 is as shown in fig. 1 and 2. A bypass valve 9 is installed at the port e of the oil duct, and the bypass valve 9 is a plug-in bypass one-way valve. The front end sealing piece II separates the oil duct g from the oil duct c. The port of the oil duct d is provided with a differential pressure signal transmitter. At the moment, the oil duct f is connected with the filter element upstream oil duct g and communicated with the oil duct d. The front end sealing piece I of the differential pressure transmitter separates oil from the oil channel f and the oil from the oil channel c in the oil channel d. At this time, the oil on the upstream of the filter element enters the differential pressure transmitter 10 through the oil passage f and the oil passage d, enters the transmitter and acts on one end of the valve core. Meanwhile, oil on the downstream of the filter element passes through the oil duct c from the oil duct B, enters the port N of the signal transmitter and acts on the other end of the valve core in the signal transmitter. During operation, oil enters from the port A of the oil inlet seat 7, is filtered by the filter element and then flows out of the filter through the port a of the oil duct and the port B of the valve block 1 of the oil duct. At the moment, the upstream oil of the filter element enters the M port from the oil passage B, the oil passage g and the oil passage f respectively, and the downstream oil enters the N port from the oil passage B and the oil passage c. When the number of particle pollutants blocked by the filter element is increased or the viscosity of the low-temperature oil is high, the pressure drop of the oil flowing through the filter element is increased (namely the pressure difference of M, N oil ports of the oil in the oil duct f and the oil in the oil duct c) and the set value of the signaling device is reached, the valve core in the signaling device moves the valve rod under the action of the pressure difference to trigger the signaling switch, so that the filter element is prompted to be blocked and needs to be replaced. If the pressure difference between the upper part and the lower part of the filter element is continuously increased, when the set value of the bypass valve is reached, hydraulic oil at the upper part of the filter element passes through the oil duct B and the oil duct g, a valve core of the bypass valve 9 inserted at the port of the oil duct e is opened, the oil enters the oil duct B through the bypass valve 9 and the oil duct c, bypasses the filter element to filter and directly reaches the lower part of the filter element, the excessive pressure difference of the filter element is prevented, and the reduction of the through-flow capacity causes air suction or.

interpretation of related terms:

(1) Bypass valve: the bypass valve is connected in parallel with a one-way valve of the filter element of the filter, when the resistance pressure drop of oil passing through the filter element is smaller than the opening pressure of the one-way valve, the bypass valve is closed, and the oil only passes through the filter element and enters a downstream pipeline. When the oil viscosity is high or the filter element is blocked due to more oil pollutant particles, the pressure difference is increased, and the oil supply interruption (air suction) at the rear end of the filter is prevented. The bypass can be opened through the parallel oil passage, so that unfiltered oil enters the main oil passage for oil supply.

(2) Differential pressure signaling device: when the filter element is blocked to a certain degree by pollutant particles in oil liquid and the pressure drop of the upstream and downstream of the filter element reaches the set value of the differential pressure signal transmitter, the signal transmitter gives an alarm to prompt an operator to replace the filter element so as to protect the cleanliness of the hydraulic system.

The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A novel filter shell structure is characterized in that: the filter comprises a shell filter cylinder and a filter shell upper cover arranged at the top of the filter cylinder, wherein the shell filter cylinder and the filter shell upper cover are of a split structure, the filter shell upper cover comprises a cover plate (2) and a valve block (1) arranged on the upper surface of the cover plate (2), the valve block (1) is provided with an oil duct B, an oil duct e, an oil duct c, an oil duct f, an oil duct g and an oil duct d, the cover plate (2) is provided with an oil duct B communicated with the oil duct g and an oil duct a communicated with the oil duct B, the oil duct e, the oil duct d, the oil duct c and the oil duct g are mutually crossed and communicated, the second ends of the oil duct a and the oil duct B are communicated with the inner cavity of the shell filter cylinder, the second ends of the oil duct e and the oil duct d are communicated with the outside, the second end of the oil duct c is communicated with the oil duct B, the first end, the oil duct e is a mounting port for mounting a bypass valve, and the oil duct d is a mounting port for mounting a differential pressure transmitter.

2. The novel filter housing construction of claim 1 wherein: the valve block (1) and the cover plate (2) are of a split structure, O-shaped ring sealing grooves are formed in the connecting part of the oil duct a and the oil duct B and the connecting part of the oil duct B and the oil duct g, O-shaped rings are arranged in the O-shaped ring sealing grooves, and the O-shaped ring sealing grooves are arranged on the lower surface of the valve block (1) or the upper surface of the cover plate (2).

3. The novel filter housing construction of claim 1 wherein: the valve block (1) and the cover plate (2) are of an integrated structure, the oil channel B and the oil channel g form an oil channel, and the oil channel a and the oil channel B form an oil channel.

4. The novel filter housing structure of claim 2 or 3, wherein: a seat (4) is installed at the second end of the oil port a, and the seat (4) is in threaded connection with the oil port a; or the seat (4) is welded on the cover plate (2), and the oil port a is communicated with the inner cavity of the filter element (8) through the seat (4).

5. The novel filter housing construction of claim 4 wherein: the shell filter cylinder comprises a cylinder (5), a filter cylinder upper end plate (3) is arranged at the top of the cylinder (5), a bottom plate (6) is arranged at the bottom of the cylinder (5), an oil inlet seat (7) communicated with the inner cavity of the cylinder (5) is arranged at one side of the cylinder (5), and the second end of an oil duct b is communicated with a cavity between the cylinder (5) and a filter element (8).

6. The novel filter housing construction of claim 5 wherein: and a sealing surface between the cover plate (2) and the upper end plate (3) of the filter cylinder is provided with a sealing O-shaped ring groove, an O-shaped ring seal is arranged in the sealing O-shaped ring groove, and the sealing O-shaped ring groove is arranged on the lower surface of the cover plate (2) or the upper surface of the upper end plate (3) of the filter cylinder.

7. A novel filter is characterized in that: the novel filter shell structure comprises a filter element (8), an external bypass valve (9) and an external differential pressure transmitter (10), wherein the filter element (8) is installed in a cylinder (5), the lower end of a seat (4) is connected with the filter element (8), the bypass valve (9) is a threaded plug-in type bypass valve, the bypass valve (9) is installed in an oil duct e, a front end sealing piece II of the bypass valve (9) is located in the oil duct g to separate the oil duct g from the oil duct c, the differential pressure transmitter (10) is installed in the oil duct d, a front end sealing piece I of the differential pressure transmitter (10) is located in the oil duct d to divide the oil duct d into a cavity A communicated with the oil duct f and a cavity B communicated with the oil duct c, and oil coming from the oil duct f in the oil duct d is separated from the oil in the oil duct c.

8. The novel filter of claim 7, wherein: and a sealing ring is arranged between the seat (4) and the filter element (8).