Flow measurement converter capable of preventing precision drift

Abstract

The utility model relates to the technical field of oiling machine metering, and provides a precision drift prevention flow measuring converter which comprises a flow measuring converter body, one end of the flow measuring converter body is provided with a flow adjusting end cover mechanism, and the lower end of one side of the flow measuring converter body is provided with an oil discharge outlet. An oil inlet is formed in one side of the filter box, a crankshaft is rotationally connected to the interior of the flow measurement converter body, a distribution valve is fixedly connected to the top end of the crankshaft, a connecting rod is fixedly connected to the surface of the crankshaft, and a piston is fixedly connected to one end of the connecting rod. The filter element plate is used for filtering entering oil, accumulation of impurities in the flow measurement converter body is reduced, the aluminum pitching diaphragm is used, the friction coefficient between the distribution valve and the valve seat is changed to be extremely low, internal leakage is avoided, the flow measurement converter operates stably, the stability of a flow meter is greatly improved, and the service life of the flow meter is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel dispenser metering, in particular to a flow measurement converter that prevents accuracy drift. Background Art

[0002] A fuel dispenser is a type of automobile refueling equipment that can quickly and conveniently refuel a car, greatly improving the efficiency of automobile driving. The demand for its use is huge nowadays, and the fuel dispenser flow measurement transducer is a very important device in the fuel dispenser. It plays a vital role in the metering system of a gas station, and can monitor and measure the oil flow, and output the monitoring data to the computer system for processing and management.

[0003] After searching, the existing patent (publication number: CN115218979A) discloses a flow measurement transducer, which aims to solve the problems of low metering accuracy, short service life and difficulty in maintenance of the existing flow measurement transducer. The transducer mainly includes a body, a bottom cover, a top cover, a side cover and a volume adjustment end cover assembly are arranged on the body, a crank assembly is arranged between the bottom cover and the top cover, the crank assembly includes a crankshaft and a bearing mounted on the crankshaft, one end of the crankshaft is connected to a distribution valve, and the other end is connected to the bottom cover, and the distribution valve is arranged on a valve seat; a piston connecting rod assembly and a piston bushing are arranged between the side cover and the volume adjustment end cover assembly, and the crankshaft passes through the piston connecting rod assembly through a bearing. The cavity of the piston connecting rod assembly of the present application adopts a straight line-arc design, and the two roller bearings mounted on the crankshaft are the same size, so that the volume adjustment end cover assembly can be exchanged at any end face, thereby facilitating later replacement and maintenance, and greatly improving the reliability, stability, metering accuracy and service life of the flow measurement transducer.

[0004] However, in the above scheme, the friction pair formed by the existing flowmeter alloy aluminum distribution valve and the synthetic graphite distribution valve seat after hard oxidation treatment is not smooth during the flowmeter refueling operation, and there is a pause and intermittent crawling phenomenon, which causes the flowmeter oil distribution mechanism to fail to operate normally, the connecting rod piston assembly runs fast and slow in the cylinder sleeve, the stroke is unstable, and the flowmeter outputs oil in excess and inadequately, resulting in inaccurate metering accuracy and repeatability drift.

[0005] In view of this, the utility model proposes a flow measurement converter for preventing accuracy drift. Utility Model Content

[0006] The utility model provides a flow measurement converter capable of preventing precision drift, and solves the problem of precision drift in the related technology.

[0007] The technical solution of the utility model is as follows: a flow measurement transducer for preventing accuracy drift, comprising a flow measurement transducer body, one end of the flow measurement transducer body is provided with a regulating end cover mechanism, the lower end of one side of the flow measurement transducer body is provided with an oil drain port, the upper end of the other side of the flow measurement transducer body is fixedly connected with a filter box, a filter assembly is provided inside the filter box, an oil inlet is provided on one side of the filter box, a crankshaft is rotatably connected inside the flow measurement transducer body, a distribution valve is fixedly connected to the top end of the crankshaft, a connecting rod is fixedly connected to the surface of the connecting rod, and a piston is fixedly connected to one end of the connecting rod.

[0008] The filter assembly comprises a mounting groove, wherein the mounting groove is provided at the top of the filter box, the top of the filter box is movably connected with a sealing plate, and the bottom of the sealing plate is fixedly connected with a filter element plate extending into the interior of the filter box, and positioning holes are provided at two ends of one side of the sealing plate, and a fixing groove is provided at the upper ends of the two sides of the back side of the filter box. A sliding rod extending into the outside of the filter box is movably connected inside the fixing groove. A fixing spring is wound around the surface of one end of the sliding rod, and one end of the fixing spring is fixedly connected to the inner wall of the fixing groove. A lever is fixedly connected to one end of the sliding rod, and a positioning rod is fixedly connected to the upper end of one side of the lever, so that gasoline entering the interior of the filter box is filtered through the filter element plate to prevent impurities in the gasoline from accumulating inside the flow measurement transducer body and affecting the sliding of the piston and the rotation of the distribution valve, and the lever can be pulled so that the positioning rod is completely separated from the interior of the positioning hole, and then the filter element plate can be taken out from the interior of the filter box through the sealing plate, so as to facilitate thorough cleaning, dredging or replacement of the filter element plate, and ensure subsequent good filtering effect.

[0009] Preferably, anti-slip protrusions are fixedly connected at equal intervals at the middle positions of both ends of the sealing plate, and the shape of the anti-slip protrusions in a top view is arc-shaped, so that the user can pull the sealing plate more conveniently.

[0010] Preferably, the cross-section of the sealing plate is in an inverted convex shape, and a snap-fit ​​structure is formed between the lower end of the sealing plate and the interior of the mounting groove, so as to facilitate preliminary shielding and sealing of the top end of the mounting groove.

[0011] Preferably, a sealing ring is fixedly connected to the lower end of the sealing plate surface, and the cross-sectional area of ​​the sealing ring is equal to the cross-sectional area of ​​the internal opening of the installation groove, thereby improving the sealing performance between the sealing plate and the interior of the installation groove after installation.

[0012] Preferably, a snap-fit ​​structure is formed between one end of the positioning rod and the inside of the positioning hole, and the positioning rod and the positioning hole are symmetrically distributed about the vertical center axis of the filter box, thereby improving the firmness and stability of the snap-fit ​​installation of the sealing plate.

[0013] Preferably, the cross-section of the shifting rod is in an inverted U shape, and one end of the shifting rod and one end of the sliding rod are welded into an integrated structure, so that the shifting rod can drive the two sliding rods to slide synchronously.

[0014] Preferably, a limiting groove is provided on the inner wall of the fixing groove, and the top and bottom ends of one end of the sliding rod are fixedly connected with limiting blocks that slide in cooperation with the inside of the limiting groove, so that the sliding rod can slide back and forth more smoothly.

[0015] Preferably, one end of the distribution valve is fixedly connected to an aluminum diaphragm, and the cross-sectional area of ​​the aluminum diaphragm is equal to the cross-sectional area of ​​one end of the distribution valve, so that the friction coefficient between the distribution valve and the valve seat is extremely low, thereby preventing internal leakage between the two and ensuring smooth operation, thereby greatly improving the stability and service life of the flow meter.

[0016] The working principle and beneficial effects of the utility model are:

[0017] 1. In the utility model, the filter element plate, the filter box and the aluminum diaphragm are arranged, and the gasoline entering the filter box is filtered through the filter element plate, so as to prevent the impurities in the gasoline from accumulating inside the flow measurement converter body and affecting the sliding of the piston and the rotation of the distribution valve, thereby reducing the friction coefficient. In addition, an aluminum diaphragm is arranged at one end of the distribution valve, so that the friction coefficient between the distribution valve and the valve seat is extremely low, and the vacuum suction phenomenon between the surface of the traditional aluminum diaphragm and the resin graphite valve seat joint surface after hard oxidation mirror grinding is avoided, so that the combined force formed by the oil inlet pressure, load force and friction force is abnormally changed, causing the flow meter to crawl from reciprocating motion to circular motion, thereby preventing the two from leaking internally, running smoothly, and greatly improving the stability and service life of the flow meter;

[0018] 2. The filter assembly provided in the utility model can completely separate the positioning rod from the inside of the positioning hole by pulling the lever, and then the filter element plate can be taken out from the inside of the filter box through the sealing plate, which is convenient for thorough cleaning, dredging or replacement of the filter element plate, thereby ensuring a good subsequent filtering effect. During installation, a sealing ring can be used to improve the sealing between the lower end of the sealing plate and the inside of the installation groove, and then the elastic force of the fixed spring can be used to make the positioning rod clamped into the inside of the positioning hole, thereby realizing rapid locking and fixing between the sealing plate and the top of the filter box, thereby realizing rapid disassembly, assembly and replacement of the filter element plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a front view structural schematic diagram of the utility model;

[0022] Figure 3 It is a front view cross-sectional structural schematic diagram of the utility model;

[0023] Figure 4 It is an enlarged structural diagram of the distribution valve of the utility model;

[0024] Figure 5 This is a schematic diagram of the exploded and enlarged structure of the filter box of the utility model;

[0025] Figure 6 It is a schematic diagram of a partially exploded and enlarged structure of the installation component of the utility model.

[0026] In the figure: 1. Filter assembly; 101. Sealing plate; 102. Anti-skid protrusion; 103. Filter element plate; 104. Positioning rod; 105. Push rod; 106. Mounting groove; 107. Sealing ring; 108. Positioning hole; 109. Fixing groove; 110. Fixing spring; 111. Limiting groove; 112. Limiting block; 113. Sliding rod; 2. Flow measurement converter body; 3. Quantity adjustment end cover mechanism; 4. Filter box; 5. Oil inlet; 6. Oil outlet; 7. Piston; 8. Connecting rod; 9. Crankshaft; 10. Distribution valve; 11. Aluminum diaphragm. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The preferred embodiment of the flow measurement converter for preventing the precision drift provided by the utility model is as follows Figures 1 to 6 As shown: a flow measurement transducer for preventing accuracy drift, comprising a flow measurement transducer body 2, one end of the flow measurement transducer body 2 is provided with a regulating end cover mechanism 3, the lower end of one side of the flow measurement transducer body 2 is provided with an oil discharge port 6, the upper end of the other side of the flow measurement transducer body 2 is fixedly connected with a filter box 4, the interior of the filter box 4 is provided with a filter assembly 1, one side of the filter box 4 is provided with an oil inlet 5, the interior of the flow measurement transducer body 2 is rotatably connected with a crankshaft 9, the top end of the crankshaft 9 is fixedly connected with a distribution valve 10, the surface of the crankshaft 9 is fixedly connected with a connecting rod 8, and one end of the connecting rod 8 is fixedly connected with a piston 7.

[0029] The filter assembly 1 includes a mounting groove 106, which is provided at the top of the filter box 4. The top of the filter box 4 is movably connected with a sealing plate 101, and the bottom of the sealing plate 101 is fixedly connected with a filter element plate 103 extending to the inside of the filter box 4. Positioning holes 108 are provided at both ends of one side of the sealing plate 101. The upper ends of both sides of the back of the filter box 4 are provided with fixing grooves 109. The inside of the fixing groove 109 is movably connected with a sliding rod 113 extending to the outside of the filter box 4. A fixing spring 110 is wound around the surface of one end of the sliding rod 113. One end of the fixing spring 110 is fixed to the inner wall of the fixing groove 109. Fixedly connected, one end of the sliding rod 113 is fixedly connected to the lever 105, and the upper end of one side of the lever 105 is fixedly connected to the positioning rod 104. The gasoline entering the filter box 4 is filtered through the filter plate 103 to prevent impurities in the gasoline from accumulating inside the flow measurement converter body 2 and affecting the sliding of the piston 7 and the rotation of the distribution valve 10. The lever 105 can be pulled to completely separate the positioning rod 104 from the inside of the positioning hole 108. After that, the filter plate 103 can be taken out from the filter box 4 through the sealing plate 101, which is convenient for thorough cleaning, dredging or replacement of the filter plate 103.

[0030] In this embodiment, anti-slip protrusions 102 are fixedly connected at equal intervals at the middle positions of both ends of the sealing plate 101. The shape of the anti-slip protrusions 102 in a top view is arc-shaped. The arc-shaped anti-slip protrusions 102 are used to increase the contact friction between the user's fingers and the sealing plate 101, making it easier for the user to pull the sealing plate 101.

[0031] In this embodiment, the cross-section of the sealing plate 101 is inverted convex, and a snap-fit ​​structure is formed between the lower end of the sealing plate 101 and the interior of the mounting groove 106. By utilizing the snap-fit ​​between the inverted convex sealing plate 101 and the interior of the mounting groove 106, the sealing plate 101 can be snap-fitted and installed to initially shield and seal the top of the mounting groove 106.

[0032] In this embodiment, a sealing ring 107 is fixedly connected to the lower end of the surface of the sealing plate 101. The cross-sectional area of ​​the sealing ring 107 is equal to the cross-sectional area of ​​the internal opening of the mounting groove 106. The sealing ring 107 is used to improve the sealing performance between the sealing plate 101 and the inside of the mounting groove 106 after installation, thereby avoiding leakage during gasoline transportation.

[0033] In this embodiment, a snap-fit ​​structure is formed between one end of the positioning rod 104 and the inside of the positioning hole 108. The positioning rod 104 and the positioning hole 108 are symmetrically distributed about the vertical center axis of the filter box 4. The snap-fitting of the symmetrically distributed positioning rod 104 and the inside of the positioning hole 108 is utilized to improve the firmness and stability of the snap-fit ​​installation of the sealing plate 101.

[0034] In this embodiment, the cross-section of the lever 105 is in an inverted U shape, and one end of the lever 105 and one end of the sliding rod 113 are welded into an integrated structure. The inverted U-shaped lever 105 can drive the two sliding rods 113 to slide synchronously.

[0035] In this embodiment, a limiting groove 111 is provided on the inner wall of the fixing groove 109, and the top and bottom ends of one end of the sliding rod 113 are fixedly connected with a limiting block 112 that slides with the inside of the limiting groove 111. The sliding of the limiting block 112 in the limiting groove 111 makes the sliding back and forth of the sliding rod 113 smoother and more stable.

[0036] In addition, one end of the distribution valve 10 is fixedly connected to an aluminum diaphragm 11, and the cross-sectional area of ​​the aluminum diaphragm 11 is equal to the cross-sectional area of ​​one end of the distribution valve 10. The aluminum diaphragm 11 is used to make the friction coefficient between the distribution valve 10 and the valve seat extremely low, so that there is no internal leakage between the two, the operation is smooth, and the stability and service life of the flow meter are greatly improved.

[0037] The working principle and use process of the utility model are as follows: first, when gasoline enters the filter box 4 from the oil inlet 5, the gasoline entering the filter box 4 can be filtered through the filter plate 103 to prevent impurities in the gasoline from accumulating inside the flow measurement converter body 2 and affecting the sliding of the piston 7 and the rotation of the distribution valve 10, thereby reducing the friction coefficient thereof. In addition, an aluminum diaphragm 11 is arranged at one end of the distribution valve 10, so that the friction coefficient between the distribution valve 10 and the valve seat is extremely low, thereby preventing the two from internal leakage and operating smoothly, greatly improving the stability and service life of the flow meter, and facilitating the normal operation of the flow measurement converter body 2;

[0038] At the same time, the lever 105 can be pulled to drive the sliding rod 113 to slide inside the fixed groove 109 to compress the fixed spring 110, and at the same time drive the positioning rod 104 to slide until it is completely separated from the positioning hole 108. Then, the filter element plate 103 is taken out from the filter box 4 through the sealing plate 101, which is convenient for thorough cleaning, dredging or replacement of the filter element plate 103 to ensure a good subsequent filtering effect. During installation, the sealing ring 107 can be used to improve the sealing between the lower end of the sealing plate 101 and the inside of the installation groove 106.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flow measurement transducer for preventing precision drift, comprising a flow measurement transducer body (2), characterized in that: An adjustment end cover mechanism (3) is provided at one end of the flow measurement converter body (2); an oil discharge port (6) is provided at the lower end of one side of the flow measurement converter body (2); a filter box (4) is fixedly connected to the upper end of the other side of the flow measurement converter body (2); a filter assembly (1) is provided inside the filter box (4); an oil inlet (5) is provided on one side of the filter box (4); a crankshaft (9) is rotatably connected inside the flow measurement converter body (2); a distribution valve (10) is fixedly connected to the top end of the crankshaft (9); a connecting rod (8) is fixedly connected to the surface of the crankshaft (9); and a piston (7) is fixedly connected to one end of the connecting rod (8); The filter assembly (1) comprises a mounting groove (106), wherein the mounting groove (106) is arranged at the top end of the filter box (4), the top end of the filter box (4) is movably connected to a sealing plate (101), the bottom end of the sealing plate (101) is fixedly connected to a filter element plate (103) extending into the interior of the filter box (4), positioning holes (108) are arranged at two ends of one side of the sealing plate (101), the upper ends of two sides of the back side of the filter box (4) are provided with fixing grooves (109), the interior of the fixing groove (109) is movably connected to a sliding rod (113) extending to the exterior of the filter box (4), a fixing spring (110) is wound around the surface of one end of the sliding rod (113), one end of the fixing spring (110) is fixedly connected to the inner wall of the fixing groove (109), one end of the sliding rod (113) is fixedly connected to a lever (105), and the upper end of one side of the lever (105) is fixedly connected to a positioning rod (104).

2. A flow measurement transducer for preventing precision drift according to claim 1, characterized in that: Anti-slip protrusions (102) are fixedly connected at equal intervals at the middle positions of both ends of the sealing plate (101), and the shape of the anti-slip protrusions (102) in a top view is an arc.

3. The flow measurement transducer for preventing precision drift according to claim 1, characterized in that: The cross-section of the sealing plate (101) is in an inverted convex shape, and a snap-fit ​​structure is formed between the lower end of the sealing plate (101) and the interior of the installation groove (106).

4. The flow measurement transducer for preventing precision drift according to claim 1, characterized in that: A sealing ring (107) is fixedly connected to the lower end of the surface of the sealing plate (101), and the cross-sectional area of ​​the sealing ring (107) is equal to the cross-sectional area of ​​the internal opening of the installation groove (106).

5. The flow measurement transducer for preventing precision drift according to claim 1, characterized in that: A snap-fit ​​structure is formed between one end of the positioning rod (104) and the interior of the positioning hole (108); the positioning rod (104) and the positioning hole (108) are symmetrically distributed about the vertical center axis of the filter box (4).

6. The flow measurement transducer for preventing precision drift according to claim 1, characterized in that: The cross section of the shifting rod (105) is in an inverted U shape, and one end of the shifting rod (105) and one end of the sliding rod (113) are welded into an integrated structure.

7. The flow measurement transducer for preventing precision drift according to claim 1, characterized in that: The inner wall of the fixing groove (109) is provided with a limiting groove (111), and the top and bottom ends of one end of the sliding rod (113) are fixedly connected with a limiting block (112) that slidably cooperates with the inside of the limiting groove (111).

8. The flow measurement transducer for preventing precision drift according to claim 1, characterized in that: One end of the distribution valve (10) is fixedly connected to an aluminum diaphragm (11), and the cross-sectional area of ​​the aluminum diaphragm (11) is equal to the cross-sectional area of ​​one end of the distribution valve (10).

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