Double-rotor flow meter with magnetic filter

Abstract

The utility model provides a double-rotor flow meter with a magnetic filter. The double-rotor flow meter comprises a flow meter body, a shell, a first cover body, a plurality of locking assemblies, a plurality of pipe sleeves, a second cover body, a plurality of magnetic bars, a rotating assembly and an operating rod. The shell is communicated with the flowmeter body, the first cover body covers an opening in the top of the shell, the multiple pipe sleeves are arranged on the first cover body in a sealing and rotating fit mode, and the second cover body is arranged above the first cover body. The plurality of magnetic bars are fixed on the second cover body, and each magnetic bar is inserted into the corresponding pipe sleeve. The rotating assembly is used for being in transmission connection with the pipe sleeves, and the operating rod is used for driving the rotating assembly to drive the pipe sleeves to rotate synchronously. By adjusting the position of the pipe sleeve, the outer wall of the pipe sleeve can face the direction in which fluid enters the shell, so that magnetic impurities can be uniformly attached to the outer wall of the pipe sleeve as much as possible, the problem that the magnetic adsorption capacity of the magnetic bar is reduced due to local accumulation of the impurities is avoided, the effective working time of the magnetic filter is prolonged, and the maintenance frequency is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to volumetric flowmeter technical field, concretely relates to a double rotor flowmeter with magnetic filter. BACKGROUND

[0002] As a kind of high-precision volumetric flowmeter, double rotor flowmeter is widely used in fluid measurement in petroleum, chemical industry, metallurgy and other industries.In actual use process, fluid often contains magnetic impurities such as iron filings and iron oxide, these impurities, if into the flowmeter interior, easily adhere to the surface of rotor, bearing and other key components, cause rotor jam, measurement accuracy decline, even cause flowmeter failure, shorten service life.

[0003] In order to solve the above problems, magnetic filter is usually added at the inlet end of flowmeter, and magnetic impurities in fluid are adsorbed by magnetic bar.As the magnetic bar and tube sleeve of traditional magnetic filter are fixedly arranged, impurities are easily concentrated and adhered to the local area (such as fluid flow direction opposite tube sleeve outer wall) outside tube sleeve, resulting in too thick impurities accumulation on tube sleeve, which affects magnetic adsorption effect.At the same time, the problem of local impurities accumulation needs to frequently disassemble magnetic filter for maintenance, which increases maintenance frequency.

[0004] Therefore, a double rotor flowmeter with magnetic filter is proposed, which can make magnetic impurities adhere to the outer wall of tube sleeve as evenly as possible, avoid the problem of local impurities accumulation leading to the decline of magnetic adsorption capacity of magnetic bar, and reduce maintenance frequency. SUMMARY

[0005] In view of the defects in the prior art, the purpose of the utility model is to provide a double rotor flowmeter with magnetic filter to solve or at least alleviate one or more of the above technical problems or other aspects in the prior art.

[0006] In order to achieve the above purpose, the utility model provides a double rotor flowmeter with magnetic filter, which comprises a flowmeter body, a shell in communication with the flowmeter body, a first cover body covering the open top of the shell, a plurality of locking assemblies for locking the first cover body on the shell, a plurality of tube sleeves sealingly and rotatably fitted on the first cover body, the tube sleeves having a structure with open top and closed bottom, a second cover body arranged above the first cover body, a plurality of magnetic bars arranged on the second cover body, each magnetic bar being inserted into a corresponding tube sleeve, a rotating assembly arranged between the first cover body and the second cover body, the rotating assembly being used for driving connection of each tube sleeve, and an operating rod for driving the rotating assembly to synchronously rotate each tube sleeve.

[0007] Preferably, the rotating assembly comprises a first gear and a plurality of second gears, the first gear is rotationally fitted on the first cover body, the first gear is engaged with each of the second gears respectively, and the operating rod is used to drive the first gear to rotate; the horizontal height of the open end of the sleeve is higher than the horizontal height of the top surface of the first cover body, the number of the second gears corresponds to the number of the sleeves, and the second gears are fixedly sleeved outside the sleeves.

[0008] Preferably, the edge of the open end of the sleeve extends outward to form a flange, the second gears are located between the flange and the first cover body, the second cover body is provided with a plurality of limiting units on the side facing the first cover body, the number of the limiting units corresponds to the number of the magnetic rods, and each of the limiting units abuts on a corresponding flange.

[0009] Preferably, the limiting unit comprises a plurality of balls, and the balls are arranged in a ring array along the axis of the corresponding magnetic rod and abut on the flange.

[0010] Preferably, the top of the second cover body is provided with a clearance hole through which the operating rod passes, the first gear is provided with a connecting column coaxial with the first gear, and the operating rod is connected with the connecting column without relative rotation.

[0011] Preferably, the bottom of the operating rod is provided with a connecting groove, and the side of the connecting column away from the first gear is provided with a connecting head matched with the connecting groove.

[0012] Preferably, a plurality of the second gears are arranged around the outside of the first gear.

[0013] Preferably, the first cover body is provided with a supporting block for accommodating the operating rod.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model discloses a double-rotor flowmeter with a magnetic filter, and an operating rod is used to drive the rotating assembly to rotate synchronously with each sleeve, the position of the sleeve can be adjusted, the outer wall of the sleeve can be directed to the direction of fluid entering the shell, and thus the magnetic impurities can be attached to the outer wall of the sleeve as evenly as possible, the problem that the magnetic adsorption capacity of the magnetic rod is reduced due to the accumulation of impurities in a local position is avoided, the effective working time of the magnetic filter is prolonged, and the maintenance frequency is reduced. DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0017] Figure 1 The structural schematic diagram of the double-rotor flowmeter with a magnetic filter is provided for an embodiment of the present application.

[0018] Figure 2 The structural schematic diagram of the first cover body is provided.

[0019] Figure 3 The structural schematic diagram of the rotating assembly is provided.

[0020] Figure 4 The sectional view schematic diagram of the second gear installed on the pipe sleeve is provided.

[0021] Figure 5 The structural schematic diagram of the second cover body is provided.

[0022] Figure 6 The bottom view of the second cover body is provided.

[0023] Figure 7 The structural schematic diagram of the second cover body from another perspective is provided.

[0024] Figure 8 The structural schematic diagram of the operating rod is provided.

[0025] Figure 9 The structural schematic diagram of the operating rod stored on the supporting block is provided.

[0026] Reference signs:

[0027] 10, flowmeter body; 20, shell; 30, first cover body; 31, supporting block; 40, locking assembly; 50, pipe sleeve; 51, flange; 60, second cover body; 61, ball; 62, clearance hole; 70, magnetic rod; 80, rotating assembly; 81, first gear; 82, second gear; 83, connecting column; 84, connecting head; 90, operating rod; 91, connecting groove. DETAILED DESCRIPTION

[0028] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0029] It should be noted that the technical terms or scientific terms used in the present application should be understood as the general meaning understood by the skilled person in the field to which the present application belongs, unless otherwise specified.

[0030] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying 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 limiting the present application.

[0031] In addition, the terms "first", "second", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0032] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship 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.

[0033] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0034] As Figures 1-9As shown in the embodiment of the utility model, provide a double rotor flowmeter with magnetic filter, including flowmeter body 10, shell 20, first cover 30, four locking assemblies 40, four pipe sleeves 50, second cover 60, four magnetic rods 70, rotating assembly 80 and operating lever 90. Flowmeter body 10 is used to realize the accurate measurement of fluid flow, its structure is consistent with the existing double rotor flowmeter, including rotor, measurement cavity, etc., and will not be elaborated here. The fluid outlet end of shell 20 is connected with the fluid inlet end of flowmeter body 10 through flange, and the shell 20 is a hollow structure with an open top. The first cover 30 covers the opening at the top of the shell 20, of course, a sealing gasket is provided between the first cover 30 and the shell 20 to ensure that the fluid does not leak from the gap. Four locking assemblies 40 are evenly arranged along the circumference of the first cover 30 to lock the first cover 30 on the shell 20, wherein the locking assembly 40 adopts a can lid bolt and nut fastener, which has the same structure as the existing can lid bolt and nut fastener, and will not be elaborated here.

[0035] The pipe sleeve 50 has a cylindrical structure with an open top and a closed bottom. The four pipe sleeves 50 are sealingly and rotatably fitted in the through holes of the first cover 30. A sealing ring can be provided between the outer wall of the pipe sleeve 50 and the inner wall of the through hole of the first cover 30 to achieve sealing effect, while ensuring that the pipe sleeve 50 can rotate around its own axis. The material of the pipe sleeve 50 can be a non-magnetic metal (such as stainless steel) to ensure that the magnetic force of the magnetic rod 70 can penetrate the pipe sleeve 50 to attract the magnetic impurities in the external fluid.

[0036] The second cover 60 is arranged above the first cover 30 and is used to fix the magnetic rods 70. The second cover 60 has a certain gap with the first cover 30, thereby providing space for the installation of the rotating assembly 80 and the rotation of the pipe sleeve 50. The four magnetic rods 70 are fixed on the second cover 60, and each magnetic rod 70 is inserted into a corresponding pipe sleeve 50. The magnetic rod 70 can be made of a strong magnetic material (such as a neodymium iron boron magnet). The rotating assembly 80 is arranged between the first cover 30 and the second cover 60. The rotating assembly 80 is used to drive connect each pipe sleeve 50, and the operating lever 90 is used to drive the rotating assembly 80 to synchronously rotate each pipe sleeve 50.

[0037] The double rotor flowmeter with magnetic filter disclosed in the embodiment can make the rotating assembly 80 drive each pipe sleeve 50 to synchronously rotate by using the operating lever 90. By adjusting the position of the pipe sleeve 50, the outer wall of the pipe sleeve 50 can be directed towards the direction of fluid entering the shell 20, thereby making the magnetic impurities as evenly as possible adhere to the outer wall of the pipe sleeve 50, avoiding the problem of local accumulation of impurities causing the magnetic attraction ability of the magnetic rod 70 to decrease, prolonging the effective working time of the magnetic filter and reducing the maintenance frequency. At the same time, it also reduces the occurrence of magnetic impurities entering the inside of the flowmeter body 10, improves the measurement accuracy of the flowmeter body 10, and prolongs the service life.

[0038] In one embodiment, the rotating assembly 80 comprises a first gear 81 rotatably fitted in the center of the first cover 30 through a bearing, and four second gears 82 meshing with the first gear 81 respectively, the four second gears 82 being arranged around the outside of the first gear 81, and an operating rod 90 being used to drive the first gear 81 to rotate. The horizontal height of the open end of the sleeve 50 is higher than the horizontal height of the top surface of the first cover 30, thereby providing space for the installation of the second gears 82, the number of the second gears 82 corresponding to the number of the sleeves 50, and the second gears 82 being fixedly sleeved outside the sleeves 50.

[0039] When it is necessary to adjust the position of the sleeve 50, the operating rod 90 is operated to drive the first gear 81 to rotate, and the first gear 81 drives all the second gears 82 and the sleeves 50 to rotate synchronously, so that the outer wall of the sleeve 50 can contact the fluid and adsorb the impurities in each region, and the impurities can be uniformly attached. The design of the rotating assembly 80 has a simple overall structure and occupies a small space, and is convenient to operate and maintain.

[0040] In one embodiment, the edge of the open end of the sleeve 50 extends outward to form a flange 51, and the second gears 82 are located between the flange 51 and the first cover 30. The side of the second cover 60 facing the first cover 30 is provided with four limiting units, the number of the limiting units corresponding to the number of the magnetic rods 70, and each limiting unit abutting against a corresponding flange 51. The design of the limiting unit can avoid the axial movement of the sleeve 50. Specifically, the limiting unit comprises a plurality of balls 61 arranged in a ring array along the axis of the corresponding magnetic rod 70, and the balls 61 abutting against the flange 51. The balls 61 are fixed to the inside of the second cover 60 through a base. Since the balls 61 can roll flexibly, the balls 61 can not only limit the flange 51 in the axial direction, but also reduce the friction between the sleeve 50 and the flange 51 when the sleeve 50 rotates, thereby ensuring the smooth rotation of the sleeve 50.

[0041] In one embodiment, the top of the second cover 60 is provided with a clearance hole 62 for the operating rod 90 to pass through. The first gear 81 is provided with a coaxial connecting post 83, and the operating rod 90 is non-rotatably connected to the connecting post 83. Specifically, the bottom of the operating rod 90 is provided with a connecting groove 91, and the side of the connecting post 83 facing away from the first gear 81 is provided with a connector 84 that mates with the connecting groove 91. The operator utilizes the connecting groove 91 of the operating rod 90 to mate with the connector 84 of the first gear 81. By rotating the operating rod 90 clockwise or counterclockwise, the first gear 81 rotates, thereby driving all the second gears 82 and the pipe sleeve 50 to rotate synchronously. Of course, a dustproof seal (not shown in the drawings) can be provided between the clearance hole 62 and the operating rod 90 to prevent external impurities from entering the space between the first cover 30 and the second cover 60.

[0042] In one embodiment, a support block 31 for receiving the operating rod 90 is fixed to the first cover 30. The support block 31 is provided with a through hole for the operating rod 90 to pass through, thereby enabling the operating rod 90 to be received. Of course, after the operating rod 90 is received, the clearance hole 62 will be exposed. To prevent external impurities from entering the space between the first cover 30 and the second cover 60, a block (not shown in the drawings) can be used to cover the clearance hole 62.

[0043] In the specification of the present invention, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A dual rotor flowmeter with a magnetic filter, characterized in that: include: flow meter body (10); A housing (20) communicates with the flow meter body (10); a first cover (30) covering the opening at the top of the housing (20); A plurality of locking assemblies (40) for locking the first cover (30) on the housing (20); A plurality of pipe sleeves (50) are sealingly rotatably engaged with the first cover body (30), wherein the pipe sleeves (50) are in a structure with an open top and a closed bottom; A second cover (60) is provided above the first cover (30); A plurality of magnetic rods (70) are provided on the second cover (60), and each magnetic rod (70) is inserted into a corresponding one of the pipe sleeves (50); A rotating assembly (80) is provided between the first cover body (30) and the second cover body (60), and the rotating assembly (80) is used for transmission connection of each of the pipe sleeves (50); and The operating rod (90) is used to drive the rotating assembly (80) so as to drive each of the pipe sleeves (50) to rotate synchronously.

2. The dual rotor flowmeter with a magnetic filter according to claim 1, characterized in that: The rotating assembly (80) includes a first gear (81) and a plurality of second gears (82), the first gear (81) is rotatably engaged with the first cover (30), the first gear (81) is respectively engaged with each of the second gears (82), and the operating rod (90) is used to drive the first gear (81) to rotate; The horizontal height of the opening of the pipe sleeve (50) is higher than the horizontal height of the top surface of the first cover body (30), the number of the second gears (82) corresponds to the number of the pipe sleeves (50), and the second gears (82) are fixedly sleeved outside the pipe sleeves (50).

3. The dual rotor flowmeter with a magnetic filter according to claim 2, characterized in that: The open edge of the sleeve (50) extends outward to form a flange (51), and the second gear (82) is located between the flange (51) and the first cover (30); A plurality of limiting units are provided on a side of the second cover body (60) facing the first cover body (30), the number of the limiting units corresponding to the number of the magnetic bars (70), and each limiting unit abuts against a corresponding flange (51).

4. The dual rotor flowmeter with a magnetic filter according to claim 3, characterized in that: The limiting unit comprises a plurality of rolling balls (61), the plurality of rolling balls (61) being arranged in a ring array along the axis corresponding to the magnetic rod (70), and the rolling balls (61) abutting against the flange (51).

5. The dual rotor flowmeter with a magnetic filter according to claim 2, characterized in that: The top of the second cover (60) is provided with a clearance hole (62) for the operating rod (90) to pass through, and the first gear (81) is provided with a coaxial connecting column (83), and the operating rod (90) can be connected to the connecting column (83) without relative rotation.

6. The dual rotor flowmeter with a magnetic filter according to claim 5, characterized in that: A connecting groove (91) is provided at the bottom of the operating rod (90), and a connecting head (84) that matches the connecting groove (91) is provided on a side of the connecting column (83) facing away from the first gear (81).

7. The dual rotor flowmeter with a magnetic filter according to claim 2, characterized in that: A plurality of second gears (82) surround the outer side of the first gear (81).

8. The dual rotor flowmeter with a magnetic filter according to claim 1, characterized in that: A support block (31) for accommodating the operating rod (90) is provided on the first cover (30).

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