Differential pressure orifice flowmeter

Abstract

The utility model discloses a differential pressure orifice flowmeter, including filter mechanism and cleaning mechanism, filter mechanism includes flowmeter main part, and with ring body of flowmeter main part inner wall surface fixed connection, transversely through ring body and with flowmeter main part inner wall surface fixed connection's spacer, with ring body inner wall surface fixed connection's outer scraping ring, the inner scraping ring of sleeve joint in spacer outside. In the utility model, when filter screen cover filters liquid, electric push rod movable end timing pushes and pulls the crossbeam of flowmeter main part bottom, makes movable plate to rotate around cross bar, then under lever principle, the crossbeam above cross bar pushes filter screen cover upper half through the clamping rod straight -connected with it, and filter screen cover lower half is taken out by another two clamping rods and then moves, and the sharp surface on the inner scraping ring scrapes the impurity of filter screen cover upper half, thereby avoids filter screen cover and blocks, exempts from dismounting and clears up, has improved the use convenience and maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of orifice plate flow meter technology, specifically a differential pressure orifice plate flow meter. Background Technology

[0002] The MH6150 orifice plate flow meter is a high-range differential pressure flow device composed of a standard orifice plate and a multi-parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter, and pressure transmitter). It can measure the flow rate of gases, steam, liquids, and other fluids, and is widely used in process control and measurement in petroleum, chemical, metallurgical, power, heating, and water supply industries. A throttling device, also known as a differential pressure flow meter, consists of a primary sensing element (throttling element) and a secondary device (differential pressure transmitter and flow display). It is widely used for measuring the flow rate of gases, steam, and liquids. It features a simple structure, convenient maintenance, and stable performance.

[0003] Application number CN201920673527.9 discloses a novel orifice plate flow meter, relating to the field of orifice plate flow meter technology. It addresses the problem that existing orifice plate flow meters often measure turbid liquids with many impurities, easily causing internal blockage and shortening the flow meter's lifespan. A differential pressure transmitter is installed above the standard orifice plate, comprising a display, a pressure tapping valve, and connectors. Although the application designs the filter mechanism as detachable for easy cleaning, practical operation shows that the disassembly and maintenance process is still cumbersome, affecting ease of use and maintenance efficiency. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows: A differential pressure orifice plate flow meter includes a filtration mechanism and a cleaning mechanism. The filtration mechanism includes a flow meter body, a ring fixed to the inner wall of the flow meter body, a spacer extending transversely through the ring and fixed to the inner wall of the flow meter body, an outer scraper ring fixed to the inner wall of the ring, an inner scraper ring sleeved on the outside of the spacer, and a filter screen cover interference-fitted between the outer and inner scraper rings. The cleaning mechanism includes a crossbar fixed to one end of the flow meter body, a movable plate rotatably sleeved on the outside of the crossbar, two crossbeams rotatably connected to both ends of the movable plate, two clamping rods fixed between the filter screen cover and the crossbeams, an electric push rod fixed to the inner bottom surface of the flow meter body, and a rubber pad fixed to the inner wall of the filter screen cover. The movable end of the electric push rod is movably connected to a crossbeam near the bottom of the flow meter body.

[0006] By adopting the above technical solution, when the filter screen is filtering liquid, the movable end of the electric push rod pushes and pulls the crossbeam at the bottom of the flow meter body at regular intervals, causing the movable plate to rotate around the crossbeam. Then, under the lever principle, the crossbeam located above the crossbeam pushes the upper half of the filter screen through the clamp rod directly connected to it, while the lower half of the filter screen is pulled outward by the other two clamp rods. Then, the sharp surface on the inner scraper ring scrapes away the impurities in the upper half of the filter screen, thereby avoiding the filter screen from getting clogged, eliminating the need for disassembly and cleaning, and improving the convenience of use and maintenance efficiency.

[0007] In a preferred embodiment, the present invention can be further configured such that: the outer edge of the inner side of the outer scraper ring is provided with an arc surface, and the outer edge of the outer side of the outer scraper ring is provided with an acute surface.

[0008] In a preferred embodiment, the present invention can be further configured such that: the inner scraping ring is disposed inside the outer scraping ring, and an annular gap is formed between the inner scraping ring and the outer scraping ring, wherein the thickness of the annular gap is equal to the wall thickness of the filter screen.

[0009] In a preferred embodiment, the present invention can be further configured as follows: four clamping rods are arranged in pairs, forming two groups, with the two groups of clamping rods being laterally symmetrical about the crossbar, and the clamping rods sliding through the outer end of the spacer sleeve.

[0010] In a preferred embodiment, the present invention can be further configured such that the clamping rod is T-shaped and made of metal.

[0011] In a preferred embodiment, the present invention can be further configured such that the rubber pad is disposed on the inner side of the inner scraping ring, and the thickness of the rubber pad is equal to the thickness of the inner scraping ring.

[0012] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows: 1. In this utility model, when the filter screen is filtering liquid, the movable end of the electric push rod pushes and pulls the crossbeam at the bottom of the flow meter body at regular intervals, causing the movable plate to rotate around the crossbeam. Then, under the lever principle, the crossbeam located above the crossbeam pushes the upper half of the filter screen through the clamping rod directly connected to it, while the lower half of the filter screen is pulled outward by the other two clamping rods. Then, the sharp surface on the inner scraper ring scrapes away the impurities in the upper half of the filter screen, thereby avoiding the filter screen from getting clogged, eliminating the need for disassembly and cleaning, and improving the convenience of use and maintenance efficiency.

[0013] 2. In this utility model, when the filter screen is pulled and moved, the rubber pad will move along with it. Then, the outer end of the rubber pad contacts the inner scraper ring, and the rubber pad contracts under force. When the filter screen loses its pulling force, the rubber pad will cause the filter screen to return to its shape, so that the filtration operation can be corrected without manual intervention, thus improving the comfort of using this device. Attached Figure Description

[0014] Figure 1 This is a perspective view of the overall structure of this utility model; Figure 2 This is a front sectional view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the filtration mechanism of this utility model; Figure 4 This utility model Figure 2 Enlarged view of the A-section structure; Figure 5 This is a schematic diagram of the cleaning mechanism of this utility model; Figure 6 This is a perspective view of the outer scraping ring of this utility model.

[0015] Figure label: 100. Filter mechanism; 110. Flow meter body; 120. Ring body; 130. Spacer; 140. Outer scraper ring; 141. Arc surface; 142. Sharp surface; 150. Inner scraper ring; 160. Filter screen cover; 200. Cleaning mechanism; 210. Crossbar; 220. Movable plate; 230. Crossbeam; 240. Clamping rod; 250. Electric push rod; 260. Rubber pad. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0017] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0018] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a differential pressure orifice plate flow meter.

[0019] Example 1: Combination Figure 1-6 As shown, the present invention provides a differential pressure orifice plate flow meter, including a filtration mechanism 100 and a cleaning mechanism 200. The filtration mechanism 100 includes a flow meter body 110, an annular body 120 fixedly connected to the inner wall of the flow meter body 110, a spacer 130 that extends laterally through the annular body 120 and is fixedly connected to the inner wall of the flow meter body 110, an outer scraper ring 140 fixedly connected to the inner wall of the annular body 120, an inner scraper ring 150 sleeved on the outside of the spacer 130, and a filter screen cover 160 that is interference-fitted between the outer scraper ring 140 and the inner scraper ring 150. The cleaning mechanism 200 includes a crossbar 210 fixed to one end of the flowmeter body 110, a movable plate 220 rotatably sleeved on the outside of the crossbar 210, two crossbeams 230 rotatably connected to both ends of the movable plate 220, two clamping rods 240 fixed between the filter screen cover 160 and the crossbeams 230, an electric push rod 250 fixed to the inner bottom surface of the flowmeter body 110, and a rubber pad 260 fixed to the inner wall of the filter screen cover 160. The movable end of the electric push rod 250 is movably connected to the crossbeam 230 near the bottom of the flowmeter body 110.

[0020] Furthermore, the outer edge arc surface 141 is provided on the inner side of the outer scraper ring 140, and the outer edge sharp surface 142 is provided on the outer side of the outer scraper ring 140. The structural design of the outer scraper ring 140 ensures that when the filter screen cover 160 enters the outer side of the spacer 130 from the arc surface 141 position, the impurities on the filter screen cover 160 will not be scraped off. When the filter screen cover 160 exits from the annular gap, the sharp surface 142 will scrape off the impurities, effectively preventing impurities from falling into the flow meter body 110 and reducing the probability of damage to the flow meter body 110.

[0021] Furthermore, the inner scraping ring 150 is located inside the outer scraping ring 140, and an annular gap is formed between them. The thickness of the annular gap is equal to the wall thickness of the filter screen 160. The size design of the annular gap enables the inner scraping ring 150 and the outer scraping ring 140 to successfully scrape off the impurities on the filter screen 160.

[0022] Furthermore, the four clamping rods 240 are arranged in pairs, forming two groups. The two groups of clamping rods 240 are symmetrical about the crossbar 210. The rod body of the clamping rod 240 slides through the outer end of the spacer 130. The layout design of the clamping rods 240 can evenly pull the filter screen cover 160.

[0023] Example 2: Combination Figure 5 As shown, based on Embodiment 1, the clamping rod 240 is T-shaped and made of metal material. Using metal material to make the clamping rod 240 ensures that the clamping rod 240 can firmly clamp the filter screen cover 160.

[0024] Example 3: Combination Figure 2 , 4 and Figure 5As shown, in the above embodiment, the rubber pad 260 is disposed inside the inner scraper ring 150. The thickness of the rubber pad 260 is equal to the thickness of the inner scraper ring 150. When the filter screen cover 160 is pulled and moved, the rubber pad 260 will move along with it. Then, the outer end of the rubber pad 260 contacts the inner scraper ring 150, and the rubber pad 260 contracts under force. When the filter screen cover 160 loses its pulling force, the rubber pad 260 will cause the filter screen cover 160 to return to its shape.

[0025] The working principle and usage process of this utility model are as follows: Before use, the flow meter body 110 is model MH6150. When the device is put into actual use, the liquid enters the diaphragm 130 from the left end of the flow meter body 110 and then flows through the filter screen 160 for filtration. Here, the movable end of the electric push rod 250 extends and retracts at regular intervals. The movable end of the electric push rod 250 pushes the crossbeam 230 at the bottom of the flow meter body 110, causing the movable plate 220 to rotate around the crossbar 210. Then, under the lever principle, the crossbeam 230 located above the crossbar 210 pushes the upper half of the filter screen 160 through the clamping rod 240 directly connected to it, while the lower half of the filter screen 160 is pulled outward by the other two clamping rods 240. Then, the sharp surface 142 on the inner scraper ring 150 scrapes away the impurities in the upper half of the filter screen 160, thereby preventing the filter screen 160 from being blocked, eliminating the need for disassembly and cleaning, and improving the convenience of use and maintenance efficiency.

[0026] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A differential pressure orifice plate flow meter, characterized in that, include: The filter mechanism (100) includes a flow meter body (110), a ring (120) fixed to the inner wall of the flow meter body (110), a spacer (130) that extends laterally through the ring (120) and is fixed to the inner wall of the flow meter body (110), an outer scraper ring (140) fixed to the inner wall of the ring (120), an inner scraper ring (150) sleeved on the outside of the spacer (130), and a filter screen cover (160) that is interference-fitted between the outer scraper ring (140) and the inner scraper ring (150). The cleaning mechanism (200) includes a crossbar (210) fixed to one end of the flow meter body (110), a movable plate (220) rotatably sleeved on the outside of the crossbar (210), two crossbeams (230) rotatably connected to both ends of the movable plate (220), two clamping rods (240) fixed between the filter screen cover (160) and the crossbeams (230), an electric push rod (250) fixed to the inner bottom surface of the flow meter body (110), and a rubber pad (260) fixed to the inner wall of the filter screen cover (160). The movable end of the electric push rod (250) is movably connected to the crossbeam (230) near the bottom of the flow meter body (110).

2. The differential pressure orifice plate flow meter according to claim 1, characterized in that, The outer edge arc surface (141) is provided on the inner side of the outer scraper ring (140), and the outer edge sharp surface (142) is provided on the outer side of the outer scraper ring (140).

3. The differential pressure orifice plate flow meter according to claim 1, characterized in that, The inner scraping ring (150) is located inside the outer scraping ring (140) and forms an annular gap between them. The thickness of the annular gap is equal to the wall thickness of the filter screen (160).

4. A differential pressure orifice plate flow meter according to claim 1, characterized in that, The four clamps (240) are arranged in pairs, forming two groups. The two groups of clamps (240) are symmetrical about the crossbar (210) laterally, and the clamps (240) slide through the outer end of the spacer (130).

5. A differential pressure orifice plate flow meter according to claim 1, characterized in that, The clamp (240) is T-shaped and made of metal.

6. A differential pressure orifice plate flow meter according to claim 1, characterized in that, The rubber pad (260) is located inside the inner scraper ring (150), and the thickness of the rubber pad (260) is equal to the thickness of the inner scraper ring (150).

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