Pretreatment device for roots flowmeter

Abstract

The utility model provides a pretreatment device for a roots flowmeter. The pretreatment device comprises a device body, a filter cartridge and a cleaning assembly. A containing hole is formed in the top face of the device body, a feeding hole formed in the tangential direction of the containing hole is formed in the side wall of the device body, and a feeding connector is arranged at the end, away from the containing hole, of the feeding hole. The filter cartridge is detachably arranged in the containing hole, and a discharging connecting pipe is further arranged on the bottom face of the device body and communicates with the filter cartridge. The cleaning assembly comprises a cleaning ring, the cleaning ring is arranged on the filter cartridge in a lifting and sleeving manner, a cleaning blade part is arranged on the inner side wall of the cleaning ring, and the cleaning blade part is in contact with the outer side wall of the filter cartridge. According to the pretreatment device for the roots flowmeter, the filter cartridge can be cleaned in a non-shutdown state, the filter cartridge is prevented from being blocked, and the maintenance frequency is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to flowmeter accessory equipment field especially, it is related to a waist wheel flowmeter with pre -treatment device. BACKGROUND

[0002] Waist wheel flowmeter is a volumetric flowmeter, mainly by the measurement chamber, waist wheel and counting mechanism etc. Part constitutes. Its measurement chamber has a pair of intermeshing waist wheel, when fluid enters the measurement chamber will push the waist wheel rotation, and waist wheel every rotation will discharge a certain volume of fluid. The rotation of waist wheel will be transmitted to the counting mechanism through magnetic coupling etc. Counting mechanism records the number of waist wheel, and then calculates the cumulative flow according to the pre -marked per -turn displacement, to realize the purpose of accurately measuring fluid flow.

[0003] Because the impurity in the fluid to be measured will directly affect the measurement accuracy and service life of waist wheel flowmeter, therefore the person skilled in the art will set up filter at the front end of waist wheel flowmeter to remove the impurity in the fluid. However, when the viscosity of the fluid to be measured is high, the filter inside is easy to be blocked, thereby affecting the flow measurement accuracy of waist wheel flowmeter. The cleaning difficulty of the existing filter is high, frequent stoppage of work dismounting cleaning of the filter not only will increase the labor intensity of the staff, also will affect the actual work progress, therefore cannot satisfy the use requirement. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model aims at providing a waist wheel flowmeter with pre -treatment device to solve the above technical problems.

[0005] In order to achieve the above object, the technical scheme of the utility model is as follows:

[0006] A waist wheel flowmeter with pre -treatment device, including: device body, filter cartridge and cleaning assembly, the top surface of device body is equipped with containing hole, the lateral wall of device body is equipped with the feed hole along the tangent direction of containing hole, the feed hole is connected with containing hole, and the feed joint is equipped at the end of feed hole away from containing hole, the filter cartridge is detachably arranged in containing hole, the flow gap is formed between the outer lateral wall of filter cartridge and the inner lateral wall of containing hole, and the obturator is equipped at the top of filter cartridge, the bottom surface of device body is further equipped with discharge connection pipe, and the discharge connection pipe is connected with filter cartridge, the cleaning assembly includes cleaning ring, the cleaning ring is liftable and is sleeved on filter cartridge, the inner lateral wall of cleaning ring is equipped with cleaning blade part, and the cleaning blade part is in contact with the outer lateral wall of filter cartridge.

[0007] Further, the cleaning assembly further comprises an operating head and a connecting rod, the operating head is arranged above the plugging head, a through hole is arranged on the plugging head, the connecting rod is slidingly arranged in the through hole, the bottom end of the connecting rod is connected with the cleaning ring, and the top end of the connecting rod is connected with the operating head.

[0008] Further, the discharge connecting pipe comprises a splicing and inserting segment, a sealing segment and a connecting segment which are sequentially communicated from top to bottom, the splicing and inserting segment and the sealing segment are located in the containing hole, and the connecting segment is located outside the device body; the splicing and inserting segment is inserted into the bottom end of the filter cartridge, the outer diameter of the splicing and inserting segment is equal to the inner diameter of the filter cartridge, and the outer diameter of the sealing segment is equal to the outer diameter of the filter cartridge.

[0009] Further, a sealing ring is arranged on the splicing and inserting segment, the sealing ring is located between the bottom end face of the filter cartridge and the top end face of the sealing segment, the inner diameter of the sealing ring is equal to the outer diameter of the splicing and inserting segment, and the outer diameter of the sealing ring is equal to the outer diameter of the sealing segment.

[0010] Further, a flow-in connecting pipe is arranged on the side wall of the feeding connector, a positioning disc is arranged on the end of the feeding connector close to the device body, a flow-out connecting pipe is arranged on the positioning disc and communicates with the flow-in connecting pipe, and the flow-out connecting pipe is rotatably inserted into the feeding hole.

[0011] Further, a locking hole is arranged on the positioning disc, and a locking bolt is arranged in the locking hole; a plurality of positioning screw holes for accommodating the locking bolt are arranged on the side wall of the device body, and the plurality of positioning screw holes are annularly arranged on the circumferential side of the feeding hole.

[0012] Further, a sealing ring is arranged on the side wall of the flow-out connecting pipe, and a sealing groove for accommodating the sealing ring is arranged on the inner side wall of the feeding hole.

[0013] Further, the containing hole comprises a threaded segment and a containing segment, the threaded segment is located at the top of the containing segment, the inner diameter of the threaded segment is greater than the inner diameter of the containing segment, an external thread matched with the threaded segment is arranged on the outer side wall of the plugging head, and the feeding hole communicates with the containing segment.

[0014] Further, a blowdown connecting pipe is arranged on the device body, the blowdown connecting pipe communicates with the flow-through gap, and a detachable sealing cover is arranged on the end of the blowdown connecting pipe away from the device body.

[0015] Further, a mounting support is arranged on the side wall of the device body away from the feeding hole, and a plurality of mounting bolt holes are arranged on the mounting support.

[0016] Compared with the prior art, the front treatment device for the waist wheel flow meter has the following advantages:

[0017] (1) The pretreatment device for a rotary flow meter described in this utility model has an inlet hole on the side wall of the device body, which is opened along the tangent direction of the receiving hole, and a filter cylinder is provided in the receiving hole. When the fluid to be measured flows into the receiving hole along the inlet hole, the fluid to be measured will form a swirling flow in the flow gap, thereby improving the utilization rate of the outer surface area of ​​the filter cylinder and improving the filtration efficiency of the fluid. Secondly, the filter cylinder in this device is detachably installed inside the receiving hole, so the operator can quickly replace the filter cylinder, thereby shortening the maintenance time of this device. In addition, this device has a liftable cleaning ring on the outside of the filter cylinder. The operator can periodically drive the cleaning ring to lift and lower, thereby scraping off the high viscosity fluid and impurities attached to the outside of the filter cylinder, thereby reducing the maintenance frequency of this device.

[0018] (2) The pretreatment device for the rotary flow meter described in this utility model has an outflow connector that can be rotatably inserted into the inlet hole, and a locking bolt is provided on the positioning plate. During actual assembly, the operator can drive the inlet connector to rotate according to the relative position between the rotary flow meter and the fluid pipeline, thereby flexibly adjusting the orientation of the inflow connector and improving the assembly convenience of this device. Attached Figure Description

[0019] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0020] Figure 1 This is a schematic diagram of the pretreatment device for the rotary flow meter according to an embodiment of the present invention;

[0021] Figure 2 This is an exploded view of the pretreatment device for the rotary flow meter described in this embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional view of the pretreatment device for the rotary flow meter according to an embodiment of the present invention;

[0023] Figure 4 This is a cross-sectional view of the pretreatment device for the rotary flow meter described in this embodiment of the invention from another angle;

[0024] Figure 5 This is a cross-sectional view of the device body described in an embodiment of the present utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the filter cartridge and cleaning assembly described in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the feed connector described in an embodiment of the present invention.

[0027] Explanation of reference signs:

[0028] 1-device body; 11-threaded section; 12-receiving section; 13-feeding hole; 131-positioning screw hole; 141-splicing section; 142-sealing section; 143-connecting section; 15-drainage connector; 151-sealing cover; 16-mounting support; 161-mounting bolt hole; 2-filter cartridge; 21-plugging head; 211-passageway hole; 31-cleaning ring; 311-cleaning blade part; 32-operating head; 33-connecting rod; 4-feeding joint; 41-inflow connector; 42-positioning disc; 421-locking hole; 422-locking bolt; 43-outflow connector; 431-sealing ring; 5-sealing ring. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[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", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0031] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; 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, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0033] A kind of front processing device for waist wheel flowmeter, its structure can be by Figures 1-7The embodiment is illustrated. In the embodiment, the front treatment device of the waist-wheel flowmeter comprises a device body 1, a filter cylinder 2 and a cleaning assembly. The device body 1 is used to provide a space for the filter treatment of the fluid to be measured. The filter cylinder 2 is used to intercept impurities in the fluid to be treated. The cleaning assembly is used to clean the filter cylinder 2 so as to remove high-viscosity materials and impurities attached to the filter cylinder 2, thereby preventing the filter cylinder 2 from being blocked and reducing the maintenance frequency of the device.

[0034] Specifically, as shown in Figure 3 and Figure 4 , the top surface of the device body 1 is provided with a receiving hole. The filter cylinder 2 is detachably arranged inside the receiving hole. A flow gap is formed between the outer side wall of the filter cylinder 2 and the inner side wall of the receiving hole. The filter cylinder 2 is provided with a blocking head 21 at the top. The sidewall of the device body 1 is provided with a feed hole 13 which is opened in the tangential direction of the receiving hole. The feed hole 13 is in communication with the receiving hole. The feed hole 13 is provided with a feed connector 4 at the end away from the receiving hole. The bottom surface of the device body 1 is also provided with a discharge connector. The discharge connector is in communication with the filter cylinder 2.

[0035] In use, the feed connector should be in communication with the delivery pipeline of the fluid to be measured. The discharge connector should be in communication with the feed port of the waist-wheel flowmeter, so that the fluid to be measured enters the device for filtration and purification before entering the waist-wheel flowmeter. Since the filter cylinder 2 is arranged inside the receiving hole, when the fluid to be measured passes through the sidewall of the filter cylinder 2, the impurities mixed in the fluid will be intercepted inside the flow gap, thereby avoiding the impurities entering the waist-wheel flowmeter, ensuring that the waist-wheel flowmeter has good measurement accuracy and service life. At the same time, since the feed hole 13 in the device is opened in the tangential direction of the receiving hole, when the fluid to be measured enters the flow gap, the fluid will form a cyclone inside the flow gap. Compared with the common flow state, the fluid in the cyclone state can fully contact the sidewall of the filter cylinder 2, thereby improving the utilization rate of the filter cylinder 2 and making the filtration work of the fluid more efficient.

[0036] In order to realize the detachable connection between the filter cylinder 2 and the receiving hole, as shown in Figure 5 , the receiving hole can comprise a threaded section 11 and a receiving section 12. The threaded section 11 is located at the top of the receiving section 12. The feed hole 13 is in communication with the receiving section 12. The inner diameter of the threaded section 11 is greater than the inner diameter of the receiving section 12. The outer side wall of the blocking head 21 is provided with external threads which are matched with the threaded section 11. The staff can quickly assemble or disassemble the filter cylinder 2 into or out of the receiving hole by means of threaded connection, so as to regularly replace the filter cylinder 2.

[0037] Optionally, to avoid the unfiltered fluid in the circulation gap from entering the inside of the filter cartridge 2, the discharge connector in the embodiment can include a splicing section 141, a sealing section 142 and a connecting section 143 which are sequentially communicated from top to bottom, wherein the splicing section 141 and the sealing section 142 are located inside the accommodating hole, the connecting section 143 is located outside the device body 1, the outer diameter of the splicing section 141 should be equal to the inner diameter of the filter cartridge 2, and the outer diameter of the sealing section 142 should be equal to the outer diameter of the filter cartridge 2. When the filter cartridge 2 is installed in the accommodating hole, the splicing section 141 will be inserted into the bottom end of the filter cartridge 2. At this time, the inner side wall of the filter cartridge 2 and the outer side wall of the splicing section 141 will form a radial sealing area, and the bottom end face of the filter cartridge 2 and the top end face of the sealing section 142 will form an axial sealing area, so that the area at the bottom end of the filter cartridge 2 obtains a good plugging effect.

[0038] In addition, to further strengthen the sealing effect of the bottom end of the filter cartridge 2, a sealing ring 5 can also be arranged on the splicing section 141, and the inner diameter of the sealing ring 5 is equal to the outer diameter of the splicing section 141, and the outer diameter of the sealing ring 5 is equal to the outer diameter of the sealing section 142. During assembly, the sealing ring 5 should be located between the bottom end face of the filter cartridge 2 and the top end face of the sealing section 142, so as to plug the gap between the bottom end of the filter cartridge 2 and the top end of the sealing section 142 through the sealing ring 5.

[0039] When the waist wheel flowmeter is used to measure high-viscosity fluid, due to the high viscosity of the fluid itself, the fluid will inevitably adhere to the outer side wall of the filter cartridge 2, and the impurities intercepted outside the filter cartridge 2 will also be adhered by the adhered fluid, thereby causing the filter cartridge 2 to be blocked. To solve this problem, the cleaning assembly in the embodiment includes a cleaning ring 31.

[0040] Specifically, the cleaning ring 31 is arranged on the filter cartridge 2 in a lifting manner, a cleaning blade part 311 is arranged on the inner side wall of the cleaning ring 31, and the cleaning blade part 311 is in contact with the outer side wall of the filter cartridge 2. During use of the device, the staff can drive the cleaning ring 31 to perform lifting action at any time without stopping work, so that the cleaning blade part 311 scrapes off the fluid and impurities adhered outside the filter cartridge 2, ensures that the filter cartridge 2 always maintains an unblocked state, and effectively reduces the maintenance frequency of the device.

[0041] Optionally, to facilitate driving the cleaning ring 31 to perform lifting movement, a driving mechanism can be arranged on the device body 1, and the driving mechanism is in contact with the cleaning ring 31. Figure 6As shown, the cleaning assembly can further include an operating head 32 and a connecting rod 33. The operating head 32 is arranged above the blocking head 21, the connecting rod 33 is slidingly arranged in the passage hole 211 of the blocking head 21, the bottom end of the connecting rod 33 is connected with the cleaning ring 31, and the top end of the connecting rod 33 is connected with the operating head 32. After the device is assembled, the operating head 32 can be subjected to a force by the worker to drive the cleaning ring 31 to reciprocatingly ascend and descend, so as to clean the filter cartridge 2.

[0042] As an optional embodiment of the present embodiment, in order to facilitate the impurities and the attached fluid in the flow gap to leave the device, the device body 1 can be further provided with a blowdown connector 15 communicated with the flow gap, and a detachable sealing cover 151 is arranged at the end of the blowdown connector 15 away from the device body 1. The worker can periodically remove the sealing cover 151 to make the impurities and the attached fluid scraped off in the flow gap to be discharged to the outside along the blowdown connector 15.

[0043] In actual use, due to the difference in the relative position between the fluid conveying pipeline in the different sites and the waist wheel flowmeter, in order to improve the assembly convenience of the device, the feed connector 4 in the present embodiment can be adjusted according to the actual needs, so as to reduce the assembly difficulty of the worker.

[0044] As shown in the figure, Figure 7 The side wall of the feed connector 4 can be provided with an inflow connector 41, a positioning disc 42 is arranged at the end of the feed connector 4 close to the device body 1, and an outflow connector 43 communicated with the inflow connector 41 is arranged on the positioning disc 42. During assembly, the outflow connector 43 can be rotatably inserted into the feed hole 13, and the worker can drive the feed connector 4 to rotate according to the relative position between the waist wheel flowmeter and the fluid pipeline, so as to flexibly adjust the orientation of the inflow connector 41.

[0045] Optionally, in order to facilitate the locking of the feed connector 4, the positioning disc 42 can be provided with a locking hole 421, and a locking bolt 422 is arranged in the locking hole 421. Correspondingly, the side wall of the device body 1 should be provided with a plurality of positioning screw holes 131 for accommodating the locking bolt 422, and the plurality of positioning screw holes 131 are arranged in a ring shape on the side of the feed hole 13, so as to be able to lock and limit the feed connector 4 when the inflow connector 41 is in different orientations.

[0046] In addition, in order to improve the sealing effect between the outflow connector 43 and the feed hole 13, a sealing ring 431 can be arranged on the side wall of the outflow connector 43, and a sealing groove for accommodating the sealing ring 431 is arranged on the inner side wall of the feed hole 13, so as to avoid the leakage of the measured fluid in the device along the gap between the outflow connector 43 and the feed hole 13.

[0047] As a further optional implementation of the embodiment, the device body 1 can be further provided with a mounting support 16 on the side wall away from the feeding hole 13, and a plurality of mounting bolt holes 161 are arranged on the mounting support 16, so as to facilitate the mounting and fixing of the device.

[0048] The effects of the above scheme are described as follows:

[0049] The waist wheel flowmeter pre-processing device provided by the embodiment can form a rotational flow of the fluid to be measured in the flow-through gap through the feeding hole, thereby improving the utilization rate of the outer surface area of the filter cartridge and the filtering efficiency of the fluid. Secondly, the device can scrape off the high-viscosity fluid and impurities attached to the outside of the filter cartridge through the cleaning assembly without stopping the work, so as to ensure that the filter cartridge is in an unblocked state and reduce the maintenance frequency of the device. In addition, the device can flexibly adjust the orientation of the inflow connector according to actual needs, thereby reducing the assembly difficulty.

[0050] The above only describes the preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A pretreatment device for a positive displacement flowmeter, comprising: The utility model provides a filter device, including: Device body (1), filter cartridge (2) and cleaning assembly, the top surface of device body (1) is equipped with containing hole, is equipped with the feeding hole (13) of cutting line direction opening along containing hole on the lateral wall of device body (1), the feeding hole (13) is connected with containing hole, and is equipped with feeding connector (4) at the end of feeding hole (13) away from containing hole, filter cartridge (2) is detachably arranged in containing hole, and the flow gap is formed between the outside wall of filter cartridge (2) and the inside wall of containing hole, and is equipped with the blocking head (21) at the top of filter cartridge (2), the bottom surface of device body (1) is also equipped with the discharge connector, and the discharge connector is connected with filter cartridge (2), the cleaning assembly includes cleaning ring (31), the cleaning ring (31) is liftable and is sleeved on filter cartridge (2), is equipped with cleaning blade part (311) on the inside wall of cleaning ring (31), and cleaning blade part (311) is in contact with the outside wall of filter cartridge (2).

2. A pre-treatment device for a Vortex flowmeter according to claim 1, characterized in that: The cleaning assembly further includes an operating head (32) and a connecting rod (33), the operating head (32) is disposed above the blocking head (21), a passage hole (211) is provided on the blocking head (21), the connecting rod (33) is slidably disposed inside the passage hole (211), and the bottom end of the connecting rod (33) is connected to the cleaning ring (31), and the top end of the connecting rod (33) is connected to the operating head (32).

3. A pre-treatment device for a Vortex flowmeter as defined in claim 1, wherein: The discharge connector includes a splicing and inserting segment (141), a sealing segment (142), and a connecting segment (143) that are sequentially connected from top to bottom, the splicing and inserting segment (141) and the sealing segment (142) are located inside the containing hole, and the connecting segment (143) is located outside the device body (1); the splicing and inserting segment (141) is inserted into the bottom end of the filter cartridge (2), the outer diameter of the splicing and inserting segment (141) is equal to the inner diameter of the filter cartridge (2), and the outer diameter of the sealing segment (142) is equal to the outer diameter of the filter cartridge (2).

4. A pre-treatment device for a Vortex flowmeter according to claim 3, characterized in that: A sealing ring (5) is provided on the splicing and inserting segment (141), the sealing ring (5) is located between the bottom end surface of the filter cartridge (2) and the top end surface of the sealing segment (142), the inner diameter of the sealing ring (5) is equal to the outer diameter of the splicing and inserting segment (141), and the outer diameter of the sealing ring (5) is equal to the outer diameter of the sealing segment (142).

5. A pre-treatment device for a Vortex flowmeter as defined in claim 1, wherein: A flow-in connector (41) is provided on the side wall of the feeding connector (4), a positioning disc (42) is provided on the end of the feeding connector (4) close to the device body (1), the positioning disc (42) is provided with a flow-out connector (43) in communication with the flow-in connector (41), and the flow-out connector (43) is rotatably inserted into the feeding hole (13).

6. A pre-treatment device for a Vortex flowmeter according to claim 5, characterized in that: A locking hole (421) is provided on the positioning disc (42), and a locking bolt (422) is provided inside the locking hole (421); a plurality of positioning screw holes (131) for accommodating the locking bolt (422) are provided on the lateral wall of the device body (1), and the plurality of positioning screw holes (131) are annularly arranged on the lateral side of the feeding hole (13).

7. A pre-treatment device for a Vortex flowmeter as defined in claim 5, wherein: The side wall of the outflow connector (43) is provided with a sealing ring (431), and the inner side wall of the feeding hole (13) is provided with a sealing groove for accommodating the sealing ring (431).

8. A pre-treatment device for a Vortex flowmeter as defined in claim 1, wherein: The accommodating hole comprises a threaded section (11) and an accommodating section (12), the threaded section (11) is located at the top of the accommodating section (12), the inner diameter of the threaded section (11) is larger than that of the accommodating section (12), an external thread matched with the threaded section (11) is arranged on the outer side wall of the plugging head (21), and the feeding hole (13) is in communication with the accommodating section (12).

9. A pre-treatment device for a Vortex flowmeter as defined in claim 1, wherein: The device body (1) is provided with a blowdown connector (15) in communication with the flow gap, and a detachable sealing cover (151) is arranged at the end of the blowdown connector (15) away from the device body (1).

10. A pre-treatment device for a Vortex flowmeter as defined in claim 1, wherein: The side wall of the device body (1) away from the feeding hole (13) is provided with a mounting support (16), and a plurality of mounting bolt holes (161) are arranged on the mounting support (16).

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