High-pressure volumetric gas flowmeter

Abstract

The invention provides a high-pressure volumetric gas flow meter, and relates to the field of gas flow meters. A gas inlet in the right end of the gas flow meter main body is connected with a pneumatic box, and a gas inlet in the right end of the pneumatic box is connected with a filtering box body; and a transmission assembly is mounted at the top of the filtering box body. Through cooperation of the automatic cleaning assembly, the pneumatic box and the transmission assembly, sundries attached to the right side face of the filter screen can be automatically swept away, the air permeability of the filter screen is prevented from being affected, then the measurement precision of the air flow is improved, manual disassembly and cleaning are not needed, and therefore the convenience of the high-pressure volumetric flow meter is improved; the invention discloses a high-pressure volumetric flow meter, which solves the problems that a large number of sundries are easy to attach to the surface of a filter screen when the high-pressure volumetric flow meter is used for a long time although the filter screen is arranged at an air inlet of the high-pressure volumetric flow meter when the existing high-pressure volumetric flow meter is used for measuring the air flow, the air permeability of the filter screen is reduced by the sundries, and the measurement accuracy of the air flow is influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of gas flowmeters, and in particular to a high-pressure positive displacement gas flowmeter. Background Art

[0002] High-pressure volumetric flowmeter is a direct measurement flowmeter. It uses mechanical measuring elements to continuously divide the fluid into single fixed volume parts for discharge, and then realizes flow measurement and calculation by counting the number of fixed volumes of fluid discharged through the instrument per unit time or a certain time interval. It can be used for volume flow measurement of various liquids and gases.

[0003] When measuring gas flow, the current high-pressure positive displacement flowmeter contains impurities in the gas. In order to prevent the impurities in the gas from accumulating in the flowmeter and preventing the impurities from interfering with the normal operation of the flowmeter, a filter is usually installed at the air inlet of the high-pressure positive displacement flowmeter. Although the impurities in the gas can be filtered out by the filter, when used for a long time, a large amount of debris is easily attached to the surface of the filter at the air inlet of the flowmeter. These debris will reduce the air permeability of the filter, thereby affecting the measurement accuracy of the air flow. When cleaning the debris covering the surface of the filter, manual disassembly and cleaning are required, thereby reducing the convenience of the high-pressure positive displacement flowmeter. Summary of the invention

[0004] The disclosed embodiment relates to a high-pressure positive displacement gas flow meter, which can automatically remove the debris attached to the right side of the filter through the cooperation of the automatic cleaning component, the pneumatic box and the transmission component, so as to avoid the phenomenon of a large amount of debris attached to the surface of the filter during long-term use, avoid affecting the air permeability of the filter, and thus improve the measurement accuracy of the air flow, and when cleaning the debris covered on the surface of the filter, there is no need to manually disassemble and clean it, thereby improving the convenience of the high-pressure positive displacement flow meter; through the cooperation of the pneumatic box, the impeller, the driving shaft, the active pulley and the transmission component, when the gas passes through the inside of the pneumatic box, the airflow will drive the impeller to rotate, and then the automatic cleaning component is driven by the impeller, the driving shaft, the active pulley and the transmission component to operate, so that when the automatic cleaning component is in operation, there is no need to configure a separate motor drive; through the setting of the annular groove, the collar and the connecting rope, when the hexagon socket bolt is loosened and removed and falls, the hexagon socket bolt can be pulled by the collar and the connecting rope to avoid the loss of the loosened and removed hexagon socket bolt.

[0005] In the first aspect of the present disclosure, a high-pressure positive displacement gas flowmeter is provided, specifically including: a gas flowmeter main body; an air cylinder is connected to the air inlet at the right end of the gas flowmeter main body, and a filter box body is connected to the air inlet at the right end of the air cylinder; a transmission assembly is installed on the top of the filter box body, and a C-shaped slide rail is installed on the inner left side of the filter box body. A filter screen plate is slidably connected inside the C-shaped slide rail, and a filter screen is fixedly embedded inside the right end face of the filter screen plate; an automatic cleaning assembly is provided on the right side of the C-shaped slide rail.

[0006] In at least some embodiments, a driving rotating shaft is rotatably connected inside the air cylinder, and an impeller is installed inside the air cylinder on the outer side of the driving rotating shaft; the driving rotating shaft penetrates through the front and rear end faces of the air cylinder, and a driving pulley is fixedly installed at the rear end of the driving rotating shaft.

[0007] In at least some embodiments, a first frame-shaped connecting plate is provided at the bottom of the filter box body, and an inner hexagon bolt is movably inserted at each of the four corners of the first frame-shaped connecting plate; the bottom of the first frame-shaped connecting plate is connected to a second frame-shaped connecting plate through four inner hexagon bolts, and a threaded cylinder is provided at each of the four corners of the bottom end face of the second frame-shaped connecting plate. The four threaded cylinders are used for threaded connection with the four inner hexagon bolts; a collection box is fixedly connected inside the second frame-shaped connecting plate, and a sealing gasket is provided on the upper end face of the second frame-shaped connecting plate; a limiting block is fixedly installed at the upper left part inside the collection box, and the limiting block is used for limiting the filter screen plate.

[0008] In at least some embodiments, strip-shaped chutes are opened on the front and rear inner side surfaces of the C-shaped slide rail, strip-shaped sliders are provided on the front and rear sides of the filter screen plate, and the strip-shaped sliders on the front and rear sides of the filter screen plate are respectively slidably connected to the two strip-shaped chutes on the inner side of the C-shaped slide rail.

[0009] In at least some embodiments, an annular groove is opened on the outer peripheral surface of the upper end of each inner hexagon bolt, and a collar is sleeved inside each annular groove. A connecting rope is connected to each collar, and the connecting rope is fixedly connected to the outside of the filter box body.

[0010] In at least some embodiments, the transmission assembly includes a worm, a vertical rotating shaft, a driven pulley, a worm gear and a first bevel gear. The worm is rotatably connected to the top of the filter box body, and a driven pulley is fixedly installed at the rear end of the worm. The driven pulley is传动连接 with the driving pulley through a belt; the vertical rotating shaft is rotatably connected to the top of the filter box body, and the vertical rotating shaft penetrates through the top of the filter box body; a worm gear and a first bevel gear are respectively fixedly installed at the upper and lower ends of the vertical rotating shaft, and the worm gear meshes with the worm.

[0011] In at least some embodiments, the automatic cleaning component includes a cleaning brush, a transverse slide rod, a transverse rotating shaft, a crank, a toggle column, a strip groove and a second bevel gear. The cleaning brush is slidably connected to a transverse slide rod on the upper and lower sides, and the two transverse slide rods are fixedly connected to the right side of the U-shaped slide rail; the transverse rotating shaft is rotatably connected to the inside of the filter box, and the left end of the transverse rotating shaft is fixedly connected to the crank, and a toggle column is provided on the outer side of the left end face of the crank; a strip groove is opened on the right side of the cleaning brush, and the strip groove is slidably connected to the toggle column; a second bevel gear is installed on the outside of the transverse rotating shaft, and the second bevel gear is meshed with the first bevel gear; the bristles on the left side of the cleaning brush are in close contact with the right side of the filter.

[0012] In at least some embodiments, when the transverse rotating shaft rotates with the crank and the toggle post, the toggle post will move back and forth left and right with the cleaning brush through the strip groove.

[0013] The present invention provides a high-pressure positive displacement gas flow meter, which has the following beneficial effects: 1. Through the cooperation of the automatic cleaning component, the pneumatic box and the transmission component, the cleaning brush is finally moved back and forth left and right, and the debris attached to the right side of the filter is swept away by the cleaning brush that moves back and forth left and right, avoiding the phenomenon of a large amount of debris attached to the surface of the filter during long-term use, avoiding affecting the air permeability of the filter, thereby improving the measurement accuracy of the air flow, and when cleaning the debris covering the surface of the filter, there is no need for manual disassembly and cleaning, thereby improving the convenience of the high-pressure positive displacement flowmeter.

[0014] 2. Through the cooperation of the pneumatic box, impeller, driving shaft, active pulley and transmission assembly, when the gas passes through the inside of the pneumatic box, the airflow will drive the impeller to rotate, and then drive the automatic cleaning component to operate through the impeller, driving shaft, active pulley and transmission assembly, so that when the automatic cleaning component is in operation, there is no need to configure a separate motor drive, thereby reducing costs and power loss, and the structure is simple and practical.

[0015] 3. Through the setting of the annular groove, the ring and the connecting rope, when the hexagon socket bolt falls after being loosened and removed, the hexagon socket bolt can be pulled by the ring and the connecting rope to avoid the loss of the loosened and removed hexagon socket bolt and avoid affecting the normal installation of the collection box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0017] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0018] In the attached picture: Figure 1 A structural diagram showing the overall structure of the present application; Figure 2 A schematic diagram showing the structure of the present application from a rear perspective; Figure 3 A schematic diagram of the structure of the pneumatic box and the filter box of the present application after partial section is shown; Figure 4 A schematic diagram of the structure of the pneumatic box of the present application after partial section is shown; Figure 5 A schematic diagram of the structure of the U-shaped slide rail and the filter screen plate after being disassembled is shown; Figure 6 It shows a schematic diagram of the structure of the filter box, the first frame-shaped connecting plate, the second frame-shaped connecting plate and the collecting box after being disassembled; Figure 7 This application shows Figure 6 A schematic diagram of the structure with a partial enlargement at the center; Figure 8 The structure diagram of the impeller, transmission assembly and automatic cleaning assembly of the present application is shown; Fig. 9 A schematic diagram of the structure of the automatic cleaning component of the present application in a disassembled state is shown.

[0019] Reference numerals list 1. Gas flow meter body; 2. Pneumatic box; 201. driving shaft; 202. driving pulley; 203. impeller; 3. Filter box; 301. First frame-shaped connecting plate; 302. Second frame-shaped connecting plate; 303. Collecting box; 304. Hexagon socket bolt; 305. U-shaped slide rail; 306. Filter screen; 307. Limit block; 308. Threaded cylinder; 309. Sealing pad; 3041. Annular groove; 3042. Ring; 3043. Connecting rope; 4. Transmission assembly; 401. Worm; 402. Vertical shaft; 403. Passive pulley; 404. Worm wheel; 405. First bevel gear; 5. Automatic cleaning component; 501. Cleaning brush; 502. Horizontal slide bar; 503. Horizontal rotating shaft; 504. Crank; 505. Steering column; 506. Strip groove; 507. Second bevel gear. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0021] Embodiment 1: Please refer to Figures 1 to 9 : The present invention provides a high-pressure positive-displacement gas flowmeter, including: a gas flowmeter main body 1; an air cylinder 2 is connected to the intake port at the right end of the gas flowmeter main body 1, and a filter box 3 is connected to the intake port at the right end of the air cylinder 2; a transmission assembly 4 is installed on the top of the filter box 3, and a C-shaped slide rail 305 is installed on the inner left side of the filter box 3. A filter screen plate 306 is slidably connected to the inner side of the C-shaped slide rail 305, and a filter screen is fixedly embedded in the right end face of the filter screen plate 306; an automatic cleaning assembly 5 is provided on the right side of the C-shaped slide rail 305 for automatically cleaning the debris attached to the surface of the filter screen.

[0022] A driving rotating shaft 201 is rotatably connected inside the air cylinder 2, and an impeller 203 is installed outside the driving rotating shaft 201 inside the air cylinder 2; the driving rotating shaft 201 penetrates through the front and rear end faces of the air cylinder 2, and a driving pulley 202 is fixedly installed at the rear end of the driving rotating shaft 201; through the cooperation of the air cylinder 2, the impeller 203, the driving rotating shaft 201, the driving pulley 202 and the transmission assembly 4, when the gas passes through the inside of the air cylinder 2, it can drive the automatic cleaning assembly 5 to operate, so that when the automatic cleaning assembly 5 operates, there is no need to separately configure a motor drive, thereby reducing the cost and power consumption, and the structure is simple and the practicability is strong.

[0023] A first frame-shaped connecting plate 301 is provided at the bottom of the filtering box body 3, and an inner hexagon bolt 304 is movably inserted at each of the four corners of the first frame-shaped connecting plate 301; the bottom of the first frame-shaped connecting plate 301 is connected to a second frame-shaped connecting plate 302 by four inner hexagon bolts 304, and a threaded cylinder 308 is provided at each of the four corners of the bottom end face of the second frame-shaped connecting plate 302, and the four threaded cylinders 308 are used for threaded connection with the four inner hexagon bolts 304; a collection box 303 is fixedly connected to the inner side of the second frame-shaped connecting plate 302, and a sealing gasket 309 is provided on the upper end face of the second frame-shaped connecting plate 302; a limiting block 307 is fixedly installed at the upper left part inside the collection box 303, and the limiting block 307 is used for limiting the filter mesh plate 306; strip-shaped chutes are formed on the front and rear inner side surfaces of the U-shaped slide rail 305, strip-shaped sliders are provided on the front and rear sides of the filter mesh plate 306, and the strip-shaped sliders on the front and rear sides of the filter mesh plate 306 are respectively slidably connected to the two strip-shaped chutes on the inner side of the U-shaped slide rail 305; through the arrangement of the U-shaped slide rail 305 and the filter mesh plate 306, when replacing the filter mesh plate 306 and the filter mesh, it is only necessary to remove the second frame-shaped connecting plate 302 and the collection box 303 from the bottom of the first frame-shaped connecting plate 301, so that the bottom of the filter mesh plate 306 loses the limiting effect, and then the filter mesh plate 306 and the filter mesh can be removed and replaced, which improves the convenience of replacing the filter mesh plate 306 and the filter mesh.

[0024] The transmission assembly 4 includes a worm 401, a vertical rotating shaft 402, a driven pulley 403, a worm gear 404 and a first bevel gear 405. The worm 401 is rotatably connected to the top of the filtering box body 3, and a driven pulley 403 is fixedly installed at the rear end of the worm 401, and the driven pulley 403 is in transmission connection with the driving pulley 202 through a belt; the vertical rotating shaft 402 is rotatably connected to the top of the filtering box body 3, and the vertical rotating shaft 402 penetrates through the top of the filtering box body 3; a worm gear 404 and a first bevel gear 405 are respectively fixedly installed at the upper and lower ends of the vertical rotating shaft 402, and the worm gear 404 is meshed with the worm 401; through the arrangement of the transmission assembly 4, it is used to drive the automatic cleaning assembly 5 to operate.

[0025] The automatic cleaning component 5 includes a cleaning brush 501, a transverse slide bar 502, a transverse rotating shaft 503, a crank 504, a toggle column 505, a strip groove 506 and a second bevel gear 507. The cleaning brush 501 is slidably connected to a transverse slide bar 502 on both sides, and the two transverse slide bars 502 are fixedly connected to the right side of the U-shaped slide rail 305; the transverse rotating shaft 503 is rotatably connected to the inside of the filter box 3, and the left end of the transverse rotating shaft 503 is fixedly connected to the crank 504, and the outer side of the left end face of the crank 504 is provided with a toggle column 505; the right side of the cleaning brush 501 is provided with a strip groove Groove 506, and the strip groove 506 is slidably connected with the toggle column 505; a second bevel gear 507 is installed on the outside of the horizontal rotating shaft 503, and the second bevel gear 507 is meshed with the first bevel gear 405; the bristles on the left side of the cleaning brush 501 are in close contact with the right side of the filter; when the horizontal rotating shaft 503 rotates with the crank 504 and the toggle column 505, the toggle column 505 will move the cleaning brush 501 back and forth left and right through the strip groove 506; through the cooperation of the automatic cleaning component 5, the pneumatic box 2 and the transmission component 4, the debris attached to the right side of the filter can be automatically removed.

[0026] Embodiment 2, based on embodiment 1, as Figure 6 and Figure 7 As shown, an annular groove 3041 is formed on the outer circumferential surface of the upper end of each hexagon socket bolt 304, and a ring 3042 is sleeved inside each annular groove 3041, and each ring 3042 is connected to a connecting rope 3043, and the connecting rope 3043 is fixedly connected to the outside of the filter box 3; through the arrangement of the annular groove 3041, the ring 3042 and the connecting rope 3043, when the hexagon socket bolt 304 is loosened and removed and falls, the hexagon socket bolt 304 can be pulled, so as to avoid the loosened and removed hexagon socket bolt 304 from being lost.

[0027] The working principle of this embodiment: when in use, the high-pressure volumetric gas flowmeter is connected to the gas pipeline, and the transported gas flows to the left through the air inlet at the right end of the filter box 3, and then the impurities in the gas are filtered through the filter mesh embedded in the filter plate 306, and then enters the inside of the pneumatic box 2, and then enters the inside of the gas flowmeter body 1, and the gas flow is measured by the gas flowmeter body 1, and then the gas flow value is displayed by the instrument on the upper end of the gas flowmeter body 1.

[0028] When the gas passes through the inside of the pneumatic box 2, the airflow will drive the impeller 203 to rotate, and then drive the driving shaft 201, the active pulley 202, the passive pulley 403, the worm 401, the worm wheel 404, the vertical shaft 402, the first bevel gear 405 and the transverse shaft 503 to rotate through the impeller 203, and then drive the crank 504 and the toggle post 505 to rotate through the transverse shaft 503, and then drive the cleaning brush 501 to move back and forth left and right through the rotating toggle post 505. The cleaning brush 501 that moves back and forth left and right is used to remove debris attached to the right side of the filter screen, so as to avoid the phenomenon of a large amount of debris attached to the surface of the filter screen during long-term use, and to avoid affecting the air permeability of the filter screen, thereby improving the measurement accuracy of the air flow rate, and when cleaning the debris covering the surface of the filter screen, there is no need to manually disassemble and clean it, thereby improving the convenience of the high-pressure positive displacement flowmeter.

[0029] When the gas pipeline stops conveying gas, the swept debris will fall into the collection box 303, and the collection box 303 can be removed for cleaning. When the collection box 303 needs to be removed for cleaning, only the four hexagon socket bolts 304 need to be loosened and removed. With the cooperation of the collar 3042 and the connecting rope 3043, the loosened and removed hexagon socket bolts 304 can be prevented from being lost. When the four hexagon socket bolts 304 are loosened and removed, the second frame-shaped connecting plate 302 and the collection box 303 lose their fixing function at the bottom of the first frame-shaped connecting plate 301, and then the collection box 303 can be removed for cleaning. Moreover, since the internal volume of the collection box 303 is large, there is no need to frequently disassemble and clean the collection box 303.

[0030] In this article, there are a few points to note: 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0031] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0032] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A high pressure volumetric gas flow meter, comprising: Gas flowmeter main body (1); an air cylinder (2) is connected to the right end air inlet of the gas flowmeter main body (1), and a filter box body (3) is connected to the right end air inlet of the air cylinder (2); characterized in that a transmission assembly (4) is installed on the top of the filter box body (3), and a U-shaped slide rail (305) is installed on the left inner side of the filter box body (3), a filter screen plate (306) is slidably connected inside the U-shaped slide rail (305), and a filter screen is fixedly inlaid inside the right end face of the filter screen plate (306); an automatic cleaning assembly (5) is arranged on the right side of the U-shaped slide rail (305).

2. A high pressure volumetric gas flow meter according to claim 1, characterized in that: A driving rotating shaft (201) is rotatably connected inside the air cylinder (2), and an impeller (203) is installed outside the driving rotating shaft (201) inside the air cylinder (2); the driving rotating shaft (201) penetrates through the front and rear end faces of the air cylinder (2), and a driving belt pulley (202) is fixedly installed at the rear end of the driving rotating shaft (201).

3. A high pressure volumetric gas flow meter according to claim 1, characterized in that: A first frame-shaped connecting plate (301) is arranged at the bottom of the filter box body (3), and an inner hexagon bolt (304) is movably inserted at each of the four corners of the first frame-shaped connecting plate (301); the bottom of the first frame-shaped connecting plate (301) is connected to a second frame-shaped connecting plate (302) through four inner hexagon bolts (304), and a threaded cylinder (308) is arranged at each of the four corners of the bottom end face of the second frame-shaped connecting plate (302), and the four threaded cylinders (308) are used for threadedly connecting with the four inner hexagon bolts (304); a collecting box (303) is fixedly connected inside the second frame-shaped connecting plate (302), and a sealing gasket (309) is arranged on the upper end face of the second frame-shaped connecting plate (302); a limiting block (307) is fixedly installed at the upper left part inside the collecting box (303), and the limiting block (307) is used for limiting the filter screen plate (306).

4. A high pressure volumetric gas flow meter according to claim 1, characterized in that: Bar-shaped chutes are formed on the front and rear inner side surfaces of the U-shaped slide rail (305), bar-shaped sliders are arranged on the front and rear sides of the filter screen plate (306), and the bar-shaped sliders on the front and rear sides of the filter screen plate (306) are respectively slidably connected with the two bar-shaped chutes inside the U-shaped slide rail (305).

5. A high pressure volumetric gas flow meter according to claim 3, characterized in that: An annular groove (3041) is formed on the outer peripheral surface of the upper end of each inner hexagon bolt (304), a collar (3042) is sleeved inside each annular groove (3041), a connecting rope (3043) is connected to each collar (3042), and the connecting rope (3043) is fixedly connected to the outside of the filter box body (3).

6. A high pressure volumetric gas flow meter according to claim 2, characterized in that: The transmission assembly (4) comprises a worm (401), a vertical rotating shaft (402), a passive pulley (403), a worm wheel (404) and a first bevel gear (405); the worm (401) is rotatably connected to the top of the filter housing (3); a passive pulley (403) is fixedly mounted on the rear end of the worm (401); and the passive pulley (403) is transmission-connected to the active pulley (202) via a belt; the vertical rotating shaft (402) is rotatably connected to the top of the filter housing (3), and the vertical rotating shaft (402) passes through the top of the filter housing (3); a worm wheel (404) and a first bevel gear (405) are fixedly mounted on the upper and lower ends of the vertical rotating shaft (402), respectively, and the worm wheel (404) is meshed with the worm (401).

7. A high pressure volumetric gas flow meter according to claim 6, characterized in that: The automatic cleaning component (5) comprises a cleaning brush (501), a transverse sliding rod (502), a transverse rotating shaft (503), a crank (504), a toggle column (505), a strip groove (506) and a second bevel gear (507); the cleaning brush (501) is slidably connected to a transverse sliding rod (502) on both the upper and lower sides, and the two transverse sliding rods (502) are fixedly connected to the right side of the U-shaped slide rail (305); the transverse rotating shaft (503) is rotatably connected to the inside of the filter box (3), and ... A crank (504) is fixedly connected to the left end of the rotating shaft (503), and a toggle post (505) is provided on the outer side of the left end surface of the crank (504); a strip-shaped groove (506) is provided on the right side surface of the cleaning brush (501), and the strip-shaped groove (506) is slidably connected to the toggle post (505); a second bevel gear (507) is installed on the outside of the transverse rotating shaft (503), and the second bevel gear (507) is meshed with the first bevel gear (405); the bristles on the left side of the cleaning brush (501) are in close contact with the right side surface of the filter screen.

8. A high pressure volumetric gas flow meter according to claim 1, characterized in that: When the horizontal rotating shaft (503) rotates with the crank (504) and the toggle post (505), the toggle post (505) will move back and forth with the cleaning brush (501) through the strip groove (506).

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