Liquid filtering device

Abstract

The invention relates to the technical field of gathering and transportation of petroleum and natural gas pipelines, in particular to a liquid filtering device. The embodiment of the invention provides a liquid filtering device. The liquid filtering device comprises a shell, a filter screen, a fixed support, a fixed shaft, a movable plate, a plurality of cleaning probes, a liquid inlet assembly and a liquid outlet assembly. When the filter screen is in a normal state, liquid in the first cavity enters the second cavity after being filtered by the filter screen, the moving plate is lifted upwards, so that the moving plate is located above the filter screen, and then the liquid is discharged through the liquid outlet assembly. And when the filter screen is in a blocked state, the moving plate moves downwards into the filter screen under the action of gravity, so that the cleaning probe cleans the filter screen. According to the liquid filtering device, when the filter screen is blocked, automatic cleaning of the filter screen can be achieved, the number of times of manual cleaning or replacement of the filter screen is greatly reduced, and the problems that working procedures are tedious, production is delayed, and safety is affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas pipeline gathering and transportation, and particularly relates to a liquid filtering device. Background Art

[0002] In natural gas gathering and transportation and gas storage station yards, some equipment needs to inject liquid-phase fluids such as methanol or ethylene glycol during operation for dehydration or anti-freezing. However, when the liquid-phase fluid is transported through the pipeline and enters the equipment, it may carry some impurities in the pipeline. These impurities will cause blockage, failure, and even damage to the equipment after entering the equipment with the liquid. Therefore, a filtering device needs to be installed upstream of the equipment to filter the impurities in the liquid-phase fluid.

[0003] In the related art, since the impurities will block the filter screen after the filtering device is used for a long time, in order to ensure the filtering effect, it is necessary to frequently open the filtering device for cleaning or replace the filter screen, which is a cumbersome process, delays production, and affects safety. Summary of the Invention

[0004] The present application provides a liquid filtering device, which to a certain extent improves the technical problem that the impurities will block the filter screen after the filtering device in the related art is used for a long time, and it is necessary to frequently open the filtering device for cleaning or replace the filter screen, which is a cumbersome process, delays production, and affects safety.

[0005] A liquid filtering device provided by an embodiment of the present application includes:

[0006] A housing;

[0007] A filter screen and a fixing bracket, the fixing bracket is fixedly arranged in the housing, the filter screen is installed on the fixing bracket, the filter screen divides the interior of the housing into a first chamber and a second chamber, and the first chamber is arranged below the second chamber;

[0008] A fixing shaft, arranged in the second chamber, with one end connected to the housing and the other end connected to the filter screen;

[0009] A moving plate and a plurality of cleaning probes, the moving plate is movably assembled on the fixing shaft, and the plurality of cleaning probes are arranged at intervals at the bottom of the moving plate;

[0010] An inlet liquid assembly and an outlet liquid assembly, respectively arranged on both sides of the housing, the inlet liquid assembly is communicated with the first chamber to introduce liquid into the first chamber, and the outlet liquid assembly is communicated with the second chamber to discharge the liquid in the second chamber;

[0011] Wherein, when the filter screen is in a normal state, the liquid in the first chamber passes through the filter screen and enters the second chamber, lifting the moving plate upward so that the moving plate is located above the filter screen, and then discharged by the liquid outlet assembly; when the filter screen is in a blocked state, the moving plate moves downward into the filter screen under the action of gravity so that the cleaning probe cleans the filter screen.

[0012] In some embodiments, the filter screen includes a mesh surface and a side surface. The side surface surrounds the mesh surface to form a filtering cavity, and the filtering cavity faces the second chamber; the outer peripheral surface of the moving plate can be in contact with the inner wall of the filtering cavity. The moving plate is disposed opposite to the mesh surface, the other end of the fixed shaft is connected to the mesh surface, and the side surface is connected to the fixed bracket.

[0013] In some embodiments, each grid of the mesh surface corresponds to 1-3 of the cleaning probes.

[0014] In some embodiments, the fixed bracket includes a bracket body and a retaining edge. The bracket body is connected to the inner wall of the housing and is provided with a through hole. The retaining edge is disposed on the periphery of the through hole, and the top of the side surface is connected to the retaining edge.

[0015] In some embodiments, the height ratio of the first chamber to the second chamber is 1:2 to 1:1.

[0016] In some embodiments, the device further includes a quick-opening blind plate. An opening is provided at the top of the housing, and the quick-opening blind plate is disposed at the opening.

[0017] In some embodiments, the device further includes a pressure gauge. The pressure gauge is installed on the housing for detecting the pressure in the first chamber.

[0018] In some embodiments, the device further includes a fixing plate. An installation groove is provided on the inner wall of the housing, and the fixing plate is installed in the installation groove. One end of the fixed shaft is fixed in the fixing plate.

[0019] In some embodiments, the device further includes a sewage discharge assembly. The sewage discharge assembly is communicated with the bottom of the first chamber. The sewage discharge assembly is lower than the liquid inlet assembly and is disposed on the same side as the liquid discharge assembly.

[0020] In some embodiments, the liquid inlet assembly includes a liquid inlet pipe communicated with the first chamber and a liquid inlet valve disposed on the liquid inlet pipe; the liquid outlet assembly includes a liquid outlet pipe communicated with the second chamber and a liquid outlet valve disposed on the liquid outlet pipe; the sewage discharge assembly includes a sewage discharge pipe communicated with the first chamber and a sewage discharge valve disposed on the sewage discharge pipe.

[0021] The beneficial effects of this application are as follows:

[0022] For a liquid filtering device provided by this application, when the filter screen is in a normal state, the liquid in the first chamber enters the second chamber after being filtered by the filter screen. Since the moving plate is movably assembled on the fixed shaft, after the liquid enters the second chamber, the moving plate will be lifted upward under the action of buoyancy and is located above the filter screen. When the liquid reaches the position of the liquid outlet assembly, it is discharged by the liquid outlet assembly, thus completing the filtering process. When the liquid filtering device is used for a long time and the filter screen is in a blocked state, only a small amount of the liquid in the first chamber can enter the second chamber through the filter screen, and the buoyancy is small. Therefore, the moving plate will move downward along the fixed shaft under the action of gravity. Since the other end of the fixed shaft is connected to the filter screen, the moving plate will fall into the filter screen, and the cleaning probe on the moving plate will clean the filter screen. That is, for the liquid filtering device provided by this application, when the filter screen is blocked, automatic cleaning of the filter screen can be realized, greatly reducing the number of times of manual cleaning or replacement of the filter screen, and improving the problems of cumbersome processes, delaying production and affecting safety. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0024] Figure 1 It is a schematic structural diagram of the liquid filtering device provided by the embodiment of this application.

[0025] Description of the reference numerals:

[0026] 100 - Liquid filtering device, 110 - Housing, 111 - First chamber, 112 - Second chamber, 113 - Quick - opening blind plate, 114 - Pressure gauge, 120 - Filter screen, 121 - Mesh surface, 122 - Side surface, 130 - Fixed bracket, 131 - Bracket main body, 132 - Edge stop, 140 - Fixed shaft, 141 - Fixed plate, 150 - Moving plate, 160 - Cleaning probe, 170 - Liquid inlet assembly, 180 - Liquid outlet assembly, 190 - Sewage discharge assembly. Detailed Embodiments

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship and movement of various components in a certain posture. If the specific posture changes, the directional indication will also change accordingly.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Combination Figure 1 , the embodiment of the present application provides a liquid filtering device 100, including a housing 110, a filter 120, a fixed bracket 130, a fixed shaft 140, a movable plate 150, a plurality of cleaning probes 160, a liquid inlet assembly 170 and a liquid outlet assembly 180. The fixed bracket 130 is fixedly disposed in the housing 110, and the filter 120 is installed on the fixed bracket 130, so that the filter 120 is disposed in the housing 110. The filter 120 divides the interior of the housing 110 into a first chamber 111 and a second chamber 112, and the first chamber 111 is disposed below the second chamber 112. The fixed shaft 140 is disposed in the second chamber 112, and one end is connected to the housing 110, and the other end is connected to the filter 120. The movable plate 150 is movably assembled on the fixed shaft 140, and a plurality of cleaning probes 160 are disposed at intervals at the bottom of the movable plate 150. The liquid inlet assembly 170 and the liquid outlet assembly 180 are disposed on both sides of the housing 110. The liquid inlet assembly 170 is connected to the first chamber 111 to allow liquid to enter the first chamber 111, and the liquid outlet assembly 180 is connected to the second chamber 112 to discharge the liquid in the second chamber 112.

[0032] Among them, when the filter net 120 is in a normal state, the liquid in the first chamber 111 passes through the filter net 120 and enters the second chamber 112, lifting the moving plate 150 upward so that the moving plate 150 is located above the filter net 120, and then is discharged by the liquid outlet assembly 180; when the filter net 120 is in a blocked state, the moving plate 150 moves downward under the action of gravity into the filter net 120, so that the cleaning probe 160 cleans the filter net 120.

[0033] The housing 110 is a basic component of the liquid filtering device 100 provided in the embodiment of the present application, and is used to provide installation and protection for at least other components of the liquid filtering device 100 and provide a place for the liquid filtering operation. The housing 110 can be in the shape of a cuboid, a cylinder, a cone, etc., and there is no limitation on this.

[0034] The filter net 120 is the main component for filtering the liquid. The filter net 120 has a mesh structure. When the liquid passes through the mesh structure of the filter net 120, the impurities in the liquid are attached to the mesh structure, and the pure liquid passes through the mesh of the mesh structure and is filtered out. That is, the liquid to be filtered is in the first chamber 111, and the liquid carrying impurities is continuously introduced into the first chamber 111 through the liquid inlet assembly 170. The liquid level in the first chamber 111 continuously rises until it reaches the position of the filter net 120. The filtered pure liquid then passes through the filter net 120 and enters the second chamber 112, and is discharged by the liquid outlet assembly 180 and enters the next process, thereby realizing continuous filtering operation. Specifically, the height ratio of the first chamber 111 to the second chamber 112 can be 1:2 to 1:1.

[0035] The fixing bracket 130 can be fixedly arranged in the housing 110 by welding, screwing, etc. with the inner wall of the housing 110, and the filter net 120 can be installed in the fixing bracket 130 by any detachable connection method, such as screwing, clamping, etc., to facilitate the operator to replace the filter net 120.

[0036] A central hole is provided on the moving plate 150, and the central hole is assembled on the fixed shaft 140, so that the moving plate 150 can move up and down between the connection point of the fixed shaft 140 and the housing 110 and the filter net 120. The fixed shaft 140 can be vertically arranged to ensure that when the moving plate 150 moves along the fixed shaft 140 to the filter net 120, multiple cleaning probes 160 on the moving plate 150 can be aligned with the mesh structure of the filter net 120. In addition, in order to make the moving plate 150 move smoothly on the fixed shaft 140, a guide sleeve can be arranged in the central hole, and the guide sleeve is assembled on the fixed shaft 140.

[0037] The liquid inlet assembly 170 includes a liquid inlet pipe communicating with the first chamber 111 and a liquid inlet valve provided on the liquid inlet pipe. The liquid inlet valve is used to control the flow rate and switch of the inlet liquid. The liquid outlet assembly 180 includes a liquid outlet pipe communicating with the second chamber 112 and a liquid outlet valve provided on the liquid outlet pipe. The liquid outlet valve is used to control the flow rate and switch of the discharged liquid.

[0038] The filter screen 120 has a normal state and a blocked state. The normal state means that the meshes of the filter screen 120 are clean and can normally filter the liquid. The blocked state means that the meshes of the filter screen 120 are blocked by impurities and the liquid cannot be normally filtered. When the filter screen 120 is in the normal state, the liquid in the first chamber 111 passes through the filter screen 120 and enters the second chamber 112. Since the moving plate 150 is movably assembled on the fixed shaft 140, after the liquid enters the second chamber 112, the moving plate 150 will be lifted upward under the action of buoyancy and is located above the filter screen 120. The liquid continues to rise to the position of the liquid outlet assembly 180 and then is discharged by the liquid outlet assembly 180, thus completing the filtering process. When the liquid filtering device 100 is used for a long time and the filter screen 120 is in the blocked state, only a small amount of the liquid in the first chamber 111 can pass through the filter screen 120 and enter the second chamber 112, and the buoyancy is small. Therefore, the moving plate 150 will move downward along the fixed shaft 140 under the action of gravity. Since the other end of the fixed shaft 140 is connected to the filter screen 120, the moving plate 150 will fall into the filter screen 120, and the cleaning probe 160 on the moving plate 150 will be inserted into the meshes of the filter screen 120 to dredge the filter screen 120.

[0039] That is, for the liquid filtering device 100 provided in this application, when the filter screen 120 is blocked, automatic cleaning of the filter screen 120 can be realized, greatly reducing the number of times of manual cleaning or replacement of the filter screen 120, and improving the problems of cumbersome procedures, delaying production and affecting safety.

[0040] In some embodiments, in order to guide the downward movement of the moving plate 150 so that multiple cleaning probes 160 can be aligned with the mesh structure of the filter screen 120, the filter screen 120 includes a mesh surface 121 and a side surface 122. The side surface 122 surrounds the mesh surface 121, and the side surface 122 and the mesh surface 121 form a filtering cavity, and the filtering cavity faces the second chamber 112. The outer peripheral surface of the moving plate 150 can be in contact with the inner wall of the filtering cavity. The moving plate 150 is disposed opposite to the mesh surface 121. The other end of the fixed shaft 140 is connected to the mesh surface 121, and the side surface 122 is connected to the fixed bracket 130.

[0041] Obviously, the mesh surface 121 is the bottom surface of the filter screen 120, and the liquid in the first chamber 111 is filtered through the mesh surface 121 during the rising process. During the downward movement of the moving plate 150 in the second chamber 112, it will enter the filtering chamber, and the filtering chamber can guide the movement of the moving plate 150, so that multiple cleaning probes 160 can be aligned with the mesh surface 121 to ensure the cleaning effect of the mesh surface 121.

[0042] In some embodiments, when the moving plate 150 moves to the mesh surface 121, each grid of the mesh surface 121 needs to be correspondingly provided with a cleaning probe 160 to ensure that each grid can be cleaned, so that the filter screen 120 has the best filtering effect. Specifically, each grid of the mesh surface 121 is correspondingly provided with 1-3 cleaning probes 160.

[0043] In some embodiments, the fixed bracket 130 includes a bracket main body 131 and a flange 132. The bracket main body 131 is connected to the inner wall of the housing 110 and is provided with a through hole. The flange 132 is arranged on the periphery of the through hole, and the top of the side surface 122 is connected to the flange 132 to realize the installation of the filter screen 120 in the fixed bracket 130. The side surface 122 of the filter screen 120 can be connected to the flange 132 by any detachable connection method, such as screwing, clamping, etc., to facilitate the operator to replace the filter screen 120.

[0044] In some embodiments, since the internal components of the housing 110 may be damaged or malfunction, in order to facilitate the operator to repair or replace the internal components of the housing 110, the liquid filtering device 100 further includes a quick-opening blind plate 113. An opening is provided at the top of the housing 110, and the quick-opening blind plate 113 is arranged at the opening. That is, when the internal components of the housing 110 may be damaged or malfunction, the quick-opening blind plate 113 can be directly opened, and the internal components of the housing 110 can be repaired or replaced through the opening.

[0045] In some embodiments, when the blockage of the filter screen 120 is too serious and the cleaning by the cleaning probes 160 is not sufficient to relieve the blockage, the filter screen 120 needs to be replaced manually. In order to facilitate the operator to understand the blockage situation, the liquid filtering device 100 further includes a pressure gauge 114. The pressure gauge 114 is installed on the housing 110 and is used to detect the pressure in the first chamber 111.

[0046] Under normal circumstances, since the liquid in the first chamber 111 continuously enters the second chamber 112 through the filter screen 120 and is drained away, the pressure in the first chamber 111 tends to be stable. When the blockage of the filter screen 120 is too severe and cannot be relieved by the cleaning of the cleaning probe 160, since the liquid supply assembly 170 still continuously supplies liquid to the first chamber 111, the pressure in the first chamber 111 will increase significantly. Therefore, when the operator observes that the value of the pressure gauge 114 increases significantly, the blockage condition of the filter screen 120 can be judged, and then the quick-opening blind plate 113 can be opened to manually clean or replace the filter screen 120.

[0047] Specifically, the pressure in the first chamber 111 is within 0.4 MPa under normal circumstances. When the value of the pressure gauge 114 is greater than 0.7 MPa and has an increasing trend, it can be judged that the filter screen 120 is blocked at this time and needs to be manually processed.

[0048] In some embodiments, the liquid filtering device 100 further includes a fixing plate 141. An installation groove is formed in the inner wall of the housing 110, and the fixing plate 141 is installed in the installation groove. One end of the fixing shaft 140 is fixed in the fixing plate 141, thereby realizing the fixation of the fixing shaft 140 in the housing 110.

[0049] In some embodiments, since in the liquid in the first chamber 111, large particle impurities will directly precipitate at the bottom of the first chamber 111, and the impurities attached to the filter screen 120 are smaller. To ensure the liquid inlet space in the first chamber 111, the large particle impurities at the bottom of the first chamber 111 need to be discharged. Therefore, the liquid filtering device 100 further includes a sewage discharge assembly 190. The sewage discharge assembly 190 is communicated with the bottom of the first chamber 111, the sewage discharge assembly 190 is lower than the liquid supply assembly 170, and is arranged on the same side as the liquid discharge assembly.

[0050] Specifically, the sewage discharge assembly 190 includes a sewage discharge pipe communicated with the first chamber 111 and a sewage discharge valve arranged on the sewage discharge pipe. The sewage discharge valve is used to control the flow rate and on / off of the sewage discharge.

[0051] A liquid filtering device 100 provided by the present application. When the filter net 120 is in a normal state, the liquid in the first chamber 111 enters the second chamber 112 after being filtered by the filter net 120. Since the moving plate 150 is movably assembled on the fixed shaft 140, after the liquid enters the second chamber 112, the moving plate 150 will be lifted upward under the action of buoyancy and is located above the filter net 120. After the liquid reaches the position of the liquid outlet assembly 180, it is discharged by the liquid outlet assembly 180, thus completing the filtering process. When the liquid filtering device 100 is used for a long time and the filter net 120 is in a blocked state, only a small amount of the liquid in the first chamber 111 can enter the second chamber 112 through the filter net 120, and the buoyancy is small. Therefore, the moving plate 150 will move downward along the fixed shaft 140 under the action of gravity. Since the other end of the fixed shaft 140 is connected to the filter net 120, the moving plate 150 will fall into the filter net 120, and the cleaning probe 160 on the moving plate 150 will clean the filter net 120. That is, for the liquid filtering device 100 provided by the present application, when the filter net 120 is blocked, automatic cleaning of the filter net 120 can be realized, greatly reducing the number of times of manual cleaning or replacement of the filter net 120, and improving the problems of cumbersome processes, delaying production and affecting safety.

[0052] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0053] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A liquid filtering device, characterized in that: include: case; A filter screen and a fixing bracket, wherein the fixing bracket is fixedly arranged in the housing, the filter screen is installed on the fixing bracket, and the filter screen divides the interior of the housing into a first chamber and a second chamber, wherein the first chamber is arranged below the second chamber; A fixed shaft is disposed in the second chamber, one end of which is connected to the housing, and the other end of which is connected to the filter screen; A movable plate and a plurality of cleaning probes, wherein the movable plate is movably mounted on the fixed shaft, and the plurality of cleaning probes are spaced apart at the bottom of the movable plate; A liquid inlet assembly and a liquid outlet assembly are respectively arranged on two sides of the shell, the liquid inlet assembly is communicated with the first chamber to pass liquid into the first chamber, and the liquid outlet assembly is communicated with the second chamber to discharge liquid in the second chamber; Wherein, when the filter screen is in a normal state, the liquid in the first chamber enters the second chamber after being filtered by the filter screen, and the movable plate is lifted upward so that the movable plate is located above the filter screen, and then discharged by the liquid outlet assembly; When the filter screen is in a blocked state, the movable plate moves downward into the filter screen under the action of gravity, so that the cleaning probe cleans the filter screen.

2. The liquid filtering device according to claim 1, characterized in that: The filter screen includes a mesh surface and a side surface, wherein the side surface is arranged around the mesh surface to form a filter cavity, and the filter cavity faces the second chamber; the outer peripheral surface of the movable plate can be connected with the inner wall of the filter cavity, the movable plate is arranged opposite to the mesh surface, the other end of the fixed shaft is connected with the mesh surface, and the side surface is connected to the fixed bracket.

3. The liquid filtering device according to claim 2, characterized in that: Each grid of the mesh surface is arranged corresponding to 1-3 cleaning probes.

4. The liquid filtering device according to claim 2, characterized in that: The fixed bracket includes a bracket body and a retaining edge. The bracket body is connected to the inner wall of the shell and is provided with a through hole. The retaining edge is arranged on the periphery of the through hole, and the top of the side surface is connected to the retaining edge.

5. The liquid filtering device according to any one of claims 1 to 4, characterized in that: The height ratio of the first chamber to the second chamber is 1:2 to 1:

1.

6. The liquid filtering device according to any one of claims 1 to 4, characterized in that: The device also includes a quick-opening blind plate. An opening is provided on the top of the shell, and the quick-opening blind plate is arranged at the opening.

7. The liquid filtering device according to claim 6, characterized in that: The device further comprises a pressure gauge, which is mounted on the housing and is used to detect the pressure in the first chamber.

8. The liquid filtering device according to claim 1, characterized in that: The device also includes a fixing plate. The inner wall of the shell is provided with a mounting groove. The fixing plate is mounted in the mounting groove. One end of the fixing shaft is fixed in the fixing plate.

9. The liquid filtering device according to claim 1, characterized in that: The device further comprises a sewage discharge assembly, which is communicated with the bottom of the first chamber, is lower than the liquid inlet assembly, and is arranged on the same side as the liquid discharge assembly.

10. The liquid filtering device according to claim 9, characterized in that: The liquid inlet component includes a liquid inlet pipe connected to the first chamber and a liquid inlet valve arranged on the liquid inlet pipe; the liquid outlet component includes a liquid outlet pipe connected to the second chamber and a liquid outlet valve arranged on the liquid outlet pipe; the sewage discharge component includes a sewage discharge pipe connected to the first chamber and a sewage discharge valve arranged on the sewage discharge pipe.

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