Filtering device with anti-burst function

Abstract

The utility model discloses a filtering device with an anti-burst function. The filtering device comprises a filter cartridge, a filter cover and a pressure absorption unit, and the filter cover and the filter cartridge jointly define a filter space. The pressure absorption unit comprises a flow guide part, a shell defining a containing space, a film part arranged in the containing space and an air nozzle arranged on the shell. The flow guide piece defines a flow guide channel communicated with the filtering space and the containing space, and the thin film piece divides the containing space into a water chamber connected to the flow guide channel and an air chamber communicated with the air nozzle and used for containing compressed air. When the speed of water flow in the filtering device changes drastically, the water chamber can receive the impact of the water flow, and the air chamber is used for absorbing water pressure, so that the pressure borne by the filtering cover and the filtering cylinder is reduced, and the risk that the filtering cover or the filtering cylinder is broken is reduced.

Description

Technical Field

[0001] This utility model relates to a filtration device, and more particularly to a filtration device with explosion-proof function. Background Technology

[0002] An existing filtration device includes a filter cartridge, a filter cover disposed on the filter cartridge, and a filter element disposed on the filter cartridge and mounted on the filter cover. The filter cover has an inlet and an outlet communicating with the filter cartridge.

[0003] When using the filtration device, water flows sequentially through the inlet, the filter cartridge, and the outlet. Due to the inertia of water flow and the incompressibility of water, when the water valve located downstream of the filtration device is suddenly closed, the water flow will squeeze the surrounding pipes and the filtration device, resulting in a sudden increase in pressure on the filtration device. Over a long period of use, this can easily cause the filter cartridge and the filter cover to break. Utility Model Content

[0004] The purpose of this invention is to provide a filter device with explosion-proof function that can improve upon at least one of the aforementioned drawbacks.

[0005] This utility model relates to a filter device with explosion-proof function, comprising a filter cartridge, a filter cover, and a pressure absorption unit. The filter cover is disposed on the filter cartridge and together with the filter cartridge defines a filtration space. The pressure absorption unit includes a flow guide disposed on the filter cover, a shell disposed on the flow guide and defining a receiving space, a membrane disposed within the receiving space, and an air nozzle disposed on the shell. The flow guide defines a flow channel connecting the filtration space and the receiving space. The membrane divides the receiving space into a water chamber connected to the flow channel and an air chamber connected to the air nozzle and used to contain compressed gas.

[0006] The explosion-proof filtration device of this utility model includes a filter cartridge extending axially, a filter cover disposed on one side of the filter cartridge along the axial direction, a pressure absorption unit disposed on the side of the filter cartridge opposite to the filter cover along the axial direction, and a membrane component having an annular portion fixed to the outer shell, an anti-clogging structure facing the guide channel along the axial direction, and a membrane body portion connecting the annular portion and the anti-clogging structure. The anti-clogging structure has a body portion connected to the membrane body portion and a plurality of protrusions protruding from the body portion on one side adjacent to the water chamber.

[0007] The filter device with explosion-proof function of this utility model has an opening adjacent to the water chamber in the flow channel, the average thickness of the body part of the anti-clogging structure is greater than the average thickness of the membrane part, and the width of the body part is greater than the width of the opening of the flow channel.

[0008] The filter device with explosion-proof function of this utility model has a ratio of average thickness of the body part of the anti-clogging structure to width of the opening of the guide channel greater than 0.2.

[0009] The explosion-proof filter device of this utility model has a circular arc surface on the surface of each of the protrusions.

[0010] The explosion-proof filter device of this utility model has a filter cartridge extending axially, and a filter cover disposed on one side of the filter cartridge along the axial direction. The filter cover includes an inner side adjacent to the filter space and an outer side opposite to the inner side. An inlet penetrating the inner side and communicating with the filter space, an outlet penetrating the inner side and communicating with the filter space, and a diversion port penetrating the outlet channel are formed on the outer side. The outlet channel has a connection port formed on the inner side and connected to the filter space, an outlet formed on the outer side, and a channel portion extending radially perpendicular to the axial direction and connected between the outlet, the connection port, and the diversion port. A flow guide is disposed at the diversion port, and the flow guide channel is connected between the diversion port and the water chamber.

[0011] The explosion-proof filter device of this utility model has a pressure relief channel formed on the outer side of the filter cover, extending through to the inner side and communicating with the filter space. The explosion-proof filter device also includes a pressure relief valve disposed in the pressure relief channel of the filter cover.

[0012] The filter device with explosion-proof function described in this utility model has its outlet and inlet located on opposite sides of the filter cover along the radial direction.

[0013] The beneficial effects of this utility model are as follows: when the water flow velocity inside the explosion-proof filter device changes drastically and the water pressure in the filter space increases, the water chamber can receive the impact of the water flow and use the air chamber to absorb the water pressure, thereby reducing the pressure on the filter cover and the filter cartridge, and reducing the risk of the filter cover or the filter cartridge breaking. Attached Figure Description

[0014] Figure 1 This is a perspective view of the first embodiment of the filter device with explosion-proof function of this utility model;

[0015] Figure 2 This is an incomplete cross-sectional view showing the pressure absorption unit of the first embodiment in its initial state;

[0016] Figure 3 This is an exploded perspective view of the pressure absorption unit of the first embodiment;

[0017] Figure 4This is an incomplete cross-sectional view showing that the pressure absorption unit of the first embodiment is in a suction state;

[0018] Figure 5 This is an incomplete cross-sectional view of the second embodiment of the filter device with explosion-proof function of this utility model. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Before this utility model is described in detail, it should be noted that similar components are represented by the same numbers in the following description.

[0021] See Figure 1 and Figure 2 The first embodiment of the filter device with explosion-proof function of this utility model includes a filter cylinder 1 extending along an axial direction X, a filter cover 2 disposed on one side of the filter cylinder 1 along the axial direction X, a pressure relief valve 3 disposed on the filter cover 2, and a pressure absorption unit 4 disposed on the filter cover 2.

[0022] The filter cover 2 and the filter cartridge 1 together define a filtration space 10. The filter cover 2 includes an inner side 21 adjacent to the filtration space 10 and an outer side 22 opposite to the inner side 21. The outer side 22 has an inlet 23 extending radially Y along a direction perpendicular to the axial direction X to the inner side 21 and communicating with the filtration space 10, an outlet channel 24 extending radially Y to the inner side 21 and communicating with the filtration space 10, a branch port 25 extending radially X to the outlet channel 24, and a pressure relief channel 26 extending radially X to the inner side 21 and communicating with the filtration space 10. The outlet channel 24 has a connection port 241 formed on the inner side 21 and connected to the filtration space 10, an outlet 242 formed on the outer side 22, and a channel portion 243 extending radially Y and connecting the outlet 242, the connection port 241, and the branch port 25. The connection port 241 is used for installing a filter element (not shown). The outlet 242 and the inlet 23 are located on opposite sides of the filter cover 2 along the radial direction Y.

[0023] The pressure relief valve 3 is located in the pressure relief channel 26 of the filter cover 2. The pressure relief valve 3 can discharge excess air from the filter space 10, allowing water to flow smoothly.

[0024] See Figure 2 and Figure 3The pressure absorption unit 4 is disposed along the axial direction X on the side of the filter cover 2 opposite to the filter cartridge 1. The pressure absorption unit 4 includes a flow guide 41 disposed in the flow diversion port 25 of the filter cover 2, a housing 42 disposed in the flow guide 41 and defining a receiving space 423, a thin film 43 disposed in the receiving space 423, and an air nozzle 44 disposed in the housing 42.

[0025] The flow guide 41 defines a flow channel 411 connecting the filtration space 10 and the receiving space 423. Specifically, the flow channel 411 is tubular and has an opening 412 adjacent to the receiving space 423, and the end of the flow channel 411 opposite to the opening 412 is connected to the branch port 25. Therefore, the flow channel 411 is connected to the filtration space 10 through the water outlet channel 24.

[0026] The outer shell 42 has a lower shell portion 421 disposed on the flow guide 41, and an upper shell portion 422 that, together with the lower shell portion 421, defines the accommodating space 423.

[0027] The diaphragm member 43 is fixed to the outer shell 42 and divides the accommodating space 423 into a water chamber 424 with an opening 412 connected to the guide channel 411, and an air chamber 425 connected to the air nozzle 44 and containing compressed gas. Specifically, the diaphragm member 43 has an annular portion 431 sandwiched between the lower shell portion 421 and the upper shell portion 422, an anti-clogging structure 432 facing the opening 412 of the guide channel 411 along the axial direction X, and a membrane portion 433 connected between the annular portion 431 and the anti-clogging structure 432.

[0028] When the membrane element 43 expands due to the compressed gas in the air chamber 425, the anti-clogging structure 432 is adjacent to the opening 412 of the guide channel 411. The anti-clogging structure 432 has a body portion 434 connected to the membrane portion 433, and a plurality of protrusions 435 protruding from the body portion 434 on one side adjacent to the water chamber 424. The protrusions 435 are spaced apart from each other, and the surface of each protrusion 435 is arc-shaped. Specifically, the membrane element 43 is made of rubber and has elasticity and extensibility. The average thickness of the body portion 434 of the anti-clogging structure 432 is greater than the average thickness of the membrane portion 433, the width of the body portion 434 is greater than the width of the opening 412 of the guide channel 411, and the ratio of the average thickness of the body portion 434 to the width of the opening 412 of the guide channel 411 is greater than 0.2.

[0029] The air nozzle 44 is disposed on the upper shell portion 422 and communicates with the air chamber 425. The air nozzle 44 is used to inject compressed gas into the air chamber 425.

[0030] See Figure 2 and Figure 4 When the filtration device is installed in a water system (not shown), the pressure absorption unit 4 can switch between an initial state and a suction state. When the pressure absorption unit 4 is in the initial state (see...), Figure 2 Water does not flow into the water chamber 424. The membrane component 43 expands due to the compressed gas in the air chamber 425. At this time, the volume of the water chamber 424 is an initial water chamber volume, and the volume of the air chamber 425 is an initial air chamber volume.

[0031] When a downstream water valve (not shown) of the filtration device changes from open to closed, causing a sudden stop in the water flow, water flows into the water chamber 424 through the guide channel 411 and pushes the diaphragm 43, causing the pressure absorption unit 4 to switch to a suction state (see...). Figure 4 Since the gas is compressible, the thin film 43 can expand toward the air chamber 425, so that the volume of the water chamber 424 changes to an expanded volume larger than the initial water chamber volume, and the volume of the air chamber 425 changes to a compressed volume smaller than the initial air chamber volume, thereby absorbing the pressure generated by the change in water flow, reducing the pressure on the filter cover 2 and the filter cartridge 1, and reducing the risk of the filter cover 2 or the filter cartridge 1 breaking.

[0032] By thickening the body portion 434 of the anti-clogging structure 432 to correspond to the thickness of the membrane portion 433 and the width of the opening 412 of the guide channel 411, the deformation of the anti-clogging structure 432 can be reduced when the membrane element 43 excessively expands towards the water chamber 424 due to pressure changes, thus preventing the anti-clogging structure 432 from being sucked into the guide channel 411. Furthermore, if the anti-clogging structure 432 comes into contact with the opening of the guide channel 411, the protrusion 435 can engage at the opening 412 of the guide channel 411, further preventing the anti-clogging structure 432 from being sucked into the guide channel 411. Therefore, the anti-clogging structure 432 ensures the unobstructed flow of the guide channel 411 and maintains the normal operation of the pressure absorption unit 4.

[0033] See Figure 5This is the second embodiment of the filter device with explosion-proof function of this utility model. The difference from the first embodiment is that the flow guide 41 of the pressure absorption unit 4 is set in the pressure relief channel 26 of the filter cover 2. Since the pressure relief channel 26 is connected to the filter space 10, the pressure absorption unit 4 of the second embodiment can also achieve the effect of absorbing the impact of water flow and reducing the pressure on the filter cover 2 and the filter cylinder 1.

[0034] In summary, when the water flow velocity inside the explosion-proof filter device of this utility model changes drastically, causing the water pressure in the filter space 10 to rise, the water chamber 424 can receive the impact of the water flow and use the air chamber 425 to absorb the water pressure, thereby reducing the pressure on the filter cover 2 and the filter cartridge 1, thus reducing the risk of the filter cover 2 or the filter cartridge 1 breaking. Therefore, the purpose of this utility model can indeed be achieved.

[0035] The above description is merely an embodiment of this utility model and should not be construed as limiting the scope of this utility model. Any simple equivalent changes and modifications made in accordance with the claims and description of this utility model shall still fall within the scope of this utility model.

Claims

1. A filter device with explosion-proof function, characterized in that: The device includes a filter cartridge, a filter cover, and a pressure absorption unit. The filter cover is disposed on the filter cartridge and together with the filter cartridge defines a filtration space. The pressure absorption unit includes a flow guide disposed on the filter cover, a housing disposed on the flow guide and defining a receiving space, a membrane disposed within the receiving space, and an air nozzle disposed on the housing. The flow guide defines a flow channel connecting the filtration space and the receiving space. The membrane divides the receiving space into a water chamber connected to the flow channel and an air chamber connected to the air nozzle and used to contain compressed gas.

2. The filter device with explosion-proof function according to claim 1, characterized in that: The filter cartridge extends axially, the filter cover is disposed on one side of the filter cartridge along the axial direction, the pressure absorption unit is disposed on the side of the filter cartridge opposite to the filter cover along the axial direction, the membrane component has an annular portion fixed to the outer shell, an anti-clogging structure facing the guide channel along the axial direction, and a membrane portion connecting the annular portion and the anti-clogging structure. The anti-clogging structure has a body portion connected to the membrane portion and a plurality of protrusions protruding on one side of the body portion adjacent to the water chamber.

3. The filter device with explosion-proof function according to claim 2, characterized in that: The guide channel has an opening adjacent to the water chamber, the average thickness of the body portion of the anti-clogging structure is greater than the average thickness of the membrane portion, and the width of the body portion is greater than the width of the opening of the guide channel.

4. The filter device with explosion-proof function according to claim 3, characterized in that: The ratio of the average thickness of the body portion of the anti-clogging structure to the width of the opening of the guide channel is greater than 0.

2.

5. The filter device with explosion-proof function according to claim 2, characterized in that: The surface of each of the protrusions is arc-shaped.

6. The filter device with explosion-proof function according to claim 1, characterized in that: The filter cartridge extends axially, and the filter cover is disposed on one side of the filter cartridge along the axial direction. The filter cover includes an inner side adjacent to the filtration space and an outer side opposite to the inner side. An inlet penetrating the inner side and communicating with the filtration space, an outlet penetrating the inner side and communicating with the filtration space, and a branch outlet penetrating the outlet channel are formed on the outer side. The outlet channel has a connection port formed on the inner side and connected to the filtration space, an outlet formed on the outer side, and a channel portion extending radially perpendicular to the axial direction and connected between the outlet, the connection port, and the branch outlet. The guide member is disposed at the branch outlet, and the guide channel is connected between the branch outlet and the water chamber.

7. The filter device with explosion-proof function according to claim 6, characterized in that: A pressure relief channel is also formed on the outer side of the filter cover, extending through to the inner side and communicating with the filtration space. The filter device with explosion-proof function also includes a pressure relief valve disposed in the pressure relief channel of the filter cover.

8. The filter device with explosion-proof function according to claim 6, characterized in that: The outlet and the inlet are located on opposite sides of the filter cover along the radial direction.

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