Filtering device

Abstract

The utility model relates to the technical field of filtering devices, in particular to a filtering device. Comprising a liquid storage device, a liquid outlet box is arranged at the bottom of the liquid storage device, a filter is arranged in the liquid outlet box, the bottom wall of the filter is fixed to the bottom wall of the liquid outlet box, and a liquid outlet is formed in the bottom of the liquid outlet box and connected with a medium outlet pipe; a first opening and a second opening are formed in the top and the bottom of the filter respectively, a filter screen is arranged on the side wall of the filter, a medium outlet is formed in the bottom wall of the liquid storage device, and the projection position of the first opening on the bottom wall of the liquid storage device is located on the inner side of the medium outlet. The size of the first opening and the size of the second opening are larger than the size of the liquid outlet and the size of the medium outlet pipe respectively. The filtering device provided by the utility model can be used for filtering a medium before entering the shield pump, so that impurities are prevented from entering the pump, the flow capacity of the medium cannot be influenced, and meanwhile, the liquid level in an upstream liquid storage device cannot be increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter device technical field especially is involved in a kind of filter device. BACKGROUND

[0002] Many circulating pumps connected with heat exchange device or container are provided with filter, to prevent the impurities such as welding slag and rust slag in heat exchange device or container from entering pump, causing damage to the impeller of pump, but the filter device commonly used at present, such as T-shaped filter, Y-shaped filter, straight-through filter and cyclone filter, has relatively large resistance, and the resistance will increase sharply after the filter screen of filter is blocked, causing the inlet pressure of pump to decrease, and if the pressure decreases to the saturation temperature corresponding to the temperature of conveying medium, the conveying medium will vaporize in front of pump, causing cavitation of pump, affecting the performance and service life of pump.

[0003] For the occasion of using shield pump, the advantage of shield pump is low requirement for net positive suction head, and it is suitable for the occasion of low requirement for liquid level in upstream device and limited installation height, and if the filter device in front of shield pump is dirty and blocked, it will also cause cavitation, suction and the problem of needing to increase the liquid level of upstream to meet the requirement of net positive suction head.

[0004] The lithium bromide absorption heat pump / refrigerator is a vacuum equipment, and the solution pump and refrigerant pump adopt vacuum shield pump, and the advantage is low requirement for net positive suction head, so that the height of upstream liquid in front of pump can be reduced, and therefore the shield pump can be directly installed at the bottom of unit.

[0005] Therefore, the utility model is provided. CONTENT OF UTILITY MODEL

[0006] The utility model aims at providing a filter device, which can filter the medium before entering shield pump, prevent impurities from entering pump, will not affect the flow capacity of medium, and will not increase the liquid level in upstream liquid storage device.

[0007] The utility model provides a filter device, including liquid storage device, the bottom of liquid storage device is equipped with liquid outlet box, the inside of liquid outlet box is equipped with filter, the bottom wall of filter is fixed with the bottom wall of liquid outlet box, the bottom of liquid outlet box is equipped with liquid outlet, liquid outlet is connected with medium outlet pipe,

[0008] The top and bottom of the filter are respectively provided with a first opening and a second opening, the sidewall of the filter is provided with a filter screen, the bottom wall of the liquid storage device is provided with a medium outlet, the projection position of the first opening on the bottom wall of the liquid storage device is located inside the medium outlet, and the sizes of the first opening and the second opening are respectively greater than the size of the liquid outlet and the size of the medium outlet pipe.

[0009] Further, a blowdown valve is arranged on the bottom wall of the liquid outlet box.

[0010] Further, the height of the filter is less than the internal height of the liquid outlet box.

[0011] Further, the bottom of the liquid storage device is provided with a plurality of medium outlets, and the medium outlets are in the shape of a rectangle or a circle; the plurality of medium outlets are located inside the liquid outlet box.

[0012] Further, the diameters of the first opening and the second opening are the same, and the first opening, the second opening, the liquid outlet and the medium outlet pipe are concentric.

[0013] Further, the ratio of the diameters of the second opening and the liquid outlet is greater than 2, and the ratio of the diameters of the second opening and the medium outlet pipe is greater than 2.

[0014] Further, the filter comprises a porous plate rolled into a cylindrical shape, the top end and the bottom end of the porous plate are respectively provided with a top plate and a bottom plate, the top plate and the bottom plate are respectively provided with the first opening and the second opening, and the outer sidewall of the porous plate is provided with a filter screen.

[0015] Further, the inside of the filter and the inside of the medium outlet pipe are respectively provided with a vortex resistance baffle.

[0016] Further, the material of the filter is stainless steel.

[0017] Further, the bottom plate of the filter is welded with the bottom wall of the liquid outlet box.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The technical solution of this utility model involves setting a liquid outlet box at the bottom of the liquid storage device, and installing a filter inside the liquid outlet box. The top and bottom of the filter are respectively provided with a first opening and a second opening. When the equipment is running, the medium flows from the medium outlet of the upper liquid storage device into the liquid outlet box, is filtered by the filter screen on the side of the filter, and then enters the filter. It then enters the medium outlet pipe from the liquid outlet of the liquid outlet box and is transported to the shielded pump. Impurities will first accumulate at the bottom of the liquid outlet box and the filter. When the accumulated amount affects the side flow capacity of the filter, the medium will overflow into the filter through the first opening. Since the size of the first opening and the second opening is larger than the size of the medium outlet pipe, the resistance of the filter is very small, which will not affect the flow capacity of the medium or increase the liquid level in the upstream liquid storage device. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a main sectional view of the filtering device in an embodiment of the present invention;

[0022] Figure 2 This is a left sectional view of the filtering device in an embodiment of the present invention;

[0023] Figure 3 This is a top view of the filtering device in an embodiment of the present invention;

[0024] Figure 4 This is a front sectional view of the filter in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the installation structure of the filter device and the shielded pump in an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached drawings: 1-Liquid storage device; 101-Media outlet; 2-Liquid outlet box; 201-Liquid outlet; 3-Filter; 301-Filter screen; 302-Top plate; 303-Bottom plate; 304-First opening; 305-Second opening; 4-Media outlet pipe; 5-Vortex baffle; 6-Drain valve; 7-Pipeline; 8-Shielded pump. Detailed Implementation

[0027] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present application.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0029] In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] Embodiments

[0031] A filter device, as shown in Figure 1 , Figure 2 and Figure 3 , comprising a liquid storage device 1, the bottom of the liquid storage device 1 is provided with a liquid outlet box 2, the inside of the liquid outlet box 2 is provided with a filter 3, the bottom of the liquid outlet box 2 is provided with a liquid outlet 201, and the liquid outlet 201 is connected with a medium outlet pipe 4.

[0032] The liquid storage device 1 is a lithium bromide solution storage chamber of an absorber or a generator of a conventional unit in the art, or a refrigerant water storage chamber of an evaporator or a condenser. A plurality of medium outlets 101 are formed in the bottom of the liquid storage device 1, and a liquid outlet box 2 is installed at the bottom of the liquid storage device 1. The medium outlets 101 can be square or circular, and in the embodiment, the medium outlets 101 are four square shapes with different sizes. All the medium outlets 101 are arranged outside the first opening 304, and all the medium outlets 101 are located inside the liquid outlet box 2, that is, the liquid outlet box 2 wraps all the medium outlets 101, so that the medium discharged from the liquid storage device 1 can enter the liquid outlet box 2 through the medium outlets 101.

[0033] The top and bottom of the liquid outlet box 2 are respectively provided with a liquid inlet and a liquid outlet 201. In the embodiment, the liquid outlet box 2 is cylindrical, the top is fully open as the liquid inlet, and the bottom is provided with the liquid outlet 201. The top end of the liquid outlet box 2 can be connected to the bottom wall of the liquid storage device 1 by welding, bolts or flanges, or other detachable ways. The liquid outlet box 2 can be detached for cleaning the filter 3.

[0034] The height of the filter 3 is less than the height of the inside of the liquid outlet box 2, and the top end of the filter 3 is required to be located below the bottom wall of the liquid storage device 1. As shown in Figure 4 The filter 3 includes a porous plate rolled into a cylinder, a filter screen 301 attached to the outside of the porous plate, a top plate 302 and a bottom plate 303 fixed to the top end and the bottom end of the porous plate respectively, and the bottom plate 303 is welded to the bottom wall of the liquid outlet box 2. The top plate 302 and the bottom plate 303 are respectively provided with a first opening 304 and a second opening 305, the diameters of the first opening 304 and the second opening 305 are the same, the centers of the first opening 304 and the second opening 305 are located on the same straight line with the centers of the liquid outlet 201 and the medium outlet pipe 4, the diameter of the second opening 305 is greater than the diameters of the liquid outlet 201 and the medium outlet pipe 4, and the diameter of the second opening 305 is more than twice the diameters of the liquid outlet 201 and the medium outlet pipe 4. The projection of the first opening 304 on the bottom wall of the liquid storage device 1 is located inside all the medium outlets 101, that is, there is no medium outlet 101 above the first opening 304 of the filter 3, so as to ensure that the medium flowing out of the liquid storage device 1 first enters the area between the filter 3 and the inner wall of the liquid outlet box 2.

[0035] A vortex resistance baffle 5 is installed in the inside of the filter 3 and the inside of the medium outlet pipe 4, the vortex resistance baffle 5 is cross-shaped, and the vortex resistance baffle 5 is fixed to the inner wall of the porous plate of the filter 3. The filter 3 is made of stainless steel, and the diameter, number and mesh of the openings of the filter screen 301 and the porous plate are determined according to the type of the medium and the form of the system. The bottom plate 303 of the filter 3 is welded to the bottom wall of the liquid outlet box 2.

[0036] The bottom wall of the liquid outlet box 2 is provided with a blowdown valve 6, which is arranged between the inner wall of the liquid outlet box 2 and the filter 3, and can timely blow down as required.

[0037] The filter device can be used in front of a solution pump or a refrigerant pump of various lithium bromide absorption heat pumps / refrigerators. Figure 5 As shown in the figure, the medium outlet pipe 4 is connected with a shield pump 8 through a pipeline 7, and the medium in the medium outlet pipe 4 enters the shield pump 8 through the pipeline 7.

[0038] When the flow continues to increase or the filter screen 301 of the filter 3 is blocked, the liquid level in the liquid outlet box 2 rises to be higher than the top of the filter 3, and part of the medium will overflow to the inside of the filter 3 through the first opening 304 at the top of the filter 3. Because the diameters of the first opening 304 and the second opening 305 of the filter 3 are more than twice the diameter of the medium outlet pipe 4, the resistance of the filter 3 is very small, and the anti-cavitation liquid level height of the shield pump 8 will not be increased. In addition, even if there are impurities in the medium, the impurities will first accumulate at the bottom of the liquid outlet box 2 and the filter screen 301 of the filter 3. The space between the liquid outlet box 2 and the filter 3 is large enough, and the vacuum equipment of the unit, the closed circulation of the medium, and the unit will not have too many impurities. Therefore, the space is sufficient to accommodate the impurities generated in the production process or the running process. The impurities have a large density and will be deposited at the bottom of the liquid outlet box 2 and the filter 3, and will not enter the shield pump, causing the impeller to jam or the internal circulation cooling pipe to be blocked, resulting in overheating of the motor. After the equipment runs for a period of time, the blowdown valve 6 at the bottom of the liquid outlet box 2 can be opened to discharge the impurities deposited at the bottom of the liquid outlet box 2.

[0039] The filter device provided by the utility model has the advantages that the liquid outlet box and the filter which is provided with openings at the top end and the bottom end are arranged, the impurities in the heat exchange device or the container will first accumulate at the bottom of the liquid outlet box and the filter, when the amount of the accumulated impurities affects the flow capacity of the side surface of the filter, the medium will flow through the top of the filter, so that the flow capacity of the medium is not affected, the liquid level in the upper liquid storage device of the upstream is improved, and the performance and service life of the shield pump are improved.

[0040] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A filtering device comprising a reservoir device (1), characterized in that, The bottom of the liquid storage device (1) is provided with a liquid outlet box (2), the inside of the liquid outlet box (2) is provided with a filter (3), the bottom wall of the filter (3) is fixed with the bottom wall of the liquid outlet box (2), the bottom of the liquid outlet box (2) is provided with a liquid outlet (201), and the liquid outlet (201) is connected with a medium outlet pipe (4); The top and bottom of the filter (3) are respectively provided with a first opening (304) and a second opening (305), the side wall of the filter (3) is provided with a filter screen (301), the bottom wall of the liquid storage device (1) is provided with a medium outlet (101), the projection position of the first opening (304) on the bottom wall of the liquid storage device (1) is located inside the medium outlet (101), and the sizes of the first opening (304) and the second opening (305) are greater than the sizes of the liquid outlet (201) and the medium outlet pipe (4) respectively.

2. The filter device of claim 1, wherein, The bottom wall of the liquid outlet box (2) is provided with a pollution discharge valve (6).

3. The filter device of claim 1, wherein, The height of the filter (3) is less than the internal height of the liquid outlet box (2).

4. The filter device of claim 1, wherein, The bottom of the liquid storage device (1) is provided with a plurality of medium outlets (101), and the shapes of the medium outlets (101) are rectangular or circular; the plurality of medium outlets (101) are located inside the liquid outlet box (2).

5. The filter device of claim 1, wherein, The diameters of the first opening (304) and the second opening (305) are the same, and the first opening (304), the second opening (305), the liquid outlet (201) and the medium outlet pipe (4) are concentric.

6. The filter device of claim 5, wherein, The ratio of the diameter of the second opening (305) to the diameter of the liquid outlet (201) is greater than 2, and the ratio of the diameter of the second opening (305) to the diameter of the medium outlet pipe (4) is greater than 2.

7. The filter device of claim 1, wherein, The filter (3) comprises a porous plate wound into a cylinder, the top end and the bottom end of the porous plate are respectively provided with a top plate (302) and a bottom plate (303), the top plate (302) and the bottom plate (303) are respectively provided with the first opening (304) and the second opening (305), and the outer side wall of the porous plate is provided with a filter screen (301).

8. The filter device of claim 7, wherein, The inside of the filter (3) and the inside of the medium outlet pipe (4) are respectively provided with a vortex resistance baffle (5).

9. The filter device of claim 8, wherein, The material of the filter (3) is stainless steel.

10. The filter device of claim 9, wherein, The bottom plate (303) of the filter (3) is welded with the bottom wall of the liquid outlet box (2). The bottom plate (303) of the filter (3) is welded with the bottom wall of the liquid outlet box (2).

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