Pipeline type balance flow meter

Abstract

The invention discloses a pipeline type balanced flowmeter, and relates to the technical field of flowmeters. The device comprises a measuring tube, throttling discs and a pressure sampling port, wherein cleaning mechanisms for cleaning the surfaces of the throttling discs on the same side are arranged at the two ends of the measuring tube respectively; the cleaning mechanism comprises a supporting sleeve which is rotatably sleeved in the measuring pipe; the end, close to the throttling disc, of the supporting sleeve is provided with an elastic steel sheet correspondingly in friction contact with the surface of the throttling disc. The elastic steel sheet is of an arc-shaped structure, and the radian of the elastic steel sheet corresponds to the radian of the end of the supporting sleeve. The length of the elastic steel sheet is consistent with the diameter length of the throttling disc; one end of the elastic steel sheet is fixed with the end part of the supporting sleeve, and an extension rod for stretching the elastic steel sheet is fixed at the other end. The cleaning device has the beneficial effects that the surface of the throttling disc can be cleaned on the premise that dismounting is not needed, operation is easy, and time and labor are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of flow meters, and particularly relates to a pipeline type balanced flow meter. Background Art

[0002] The pipeline type balanced flow sensor is a porous throttle disc installed on the cross-section of a pipeline. The size and distribution of each hole are customized based on special formulas and test data, and are called function holes. When the fluid passes through the function holes of the throttle disc, the fluid will be balanced and rectified, and the eddy current will be minimized, forming an approximate ideal fluid. Through the pressure-taking device, a stable differential pressure signal can be obtained, and the volume flow rate and mass flow rate can be calculated according to Bernoulli's equation.

[0003] Due to the unstable properties of many fluid media or the presence of a lot of particulate matter, after flowing through the balanced flow meter for a long time, residues such as scaling and crystallization are likely to be generated on the surface of the throttle disc, seriously affecting the measurement accuracy. Therefore, in order to avoid the above problems, the throttle disc of the balanced flow meter needs to be cleaned regularly. At present, it can only be cleaned after removing the flow meter, which is complex in operation, time-consuming and laborious. Summary of the Invention

[0004] The technical problem to be solved by the present invention is, in view of the above-mentioned technical deficiencies, to provide a pipeline type balanced flow meter that can clean the surface of the throttle disc without removal, with simple operation, time-saving and labor-saving.

[0005] The technical solution adopted by the present invention is: to provide a pipeline type balanced flow meter, including a measuring pipe, a throttle disc, and a pressure sampling port. Cleaning mechanisms for cleaning the surface of the throttle disc on the same side are respectively arranged at both ends of the measuring pipe.

[0006] The cleaning mechanism includes a support sleeve rotatably sleeved in the measuring pipe; an elastic steel sheet corresponding to frictionally contacting the surface of the throttle disc is arranged at one end of the support sleeve close to the throttle disc; the elastic steel sheet is in an arc structure, and the radian of the elastic steel sheet corresponds to the radian of the end of the support sleeve; the length of the elastic steel sheet is the same as the diameter length of the throttle disc; one end of the elastic steel sheet is fixed to the end of the support sleeve, and the other end is fixed with an extension rod for stretching the elastic steel sheet; a working ring is coaxially rotatably connected to the end of the support sleeve far from the throttle disc; the working ring is fixedly connected to the extension rod.

[0007] To further optimize the technical solution, a cleaning rubber strip is correspondingly fixed on the side of the elastic steel sheet of a pipeline type balanced flow meter that contacts the surface of the throttle disc.

[0008] To further optimize the technical solution, a sealing ring for sealing the gap between the measuring pipe and the support sleeve is fixedly sleeved outside the support sleeve of a pipeline type balanced flow meter.

[0009] To further optimize this technical solution, a limiting sleeve is fixedly sleeved on the outer wall of the measuring tube of a pipe-type balanced flowmeter; a positioning bearing is fixedly sleeved inside the limiting sleeve; the inner ring of the positioning bearing is fixedly sleeved on the outer wall of the support sleeve.

[0010] To further optimize this technical solution, a driving member for driving the support sleeve to rotate is provided between the measuring tube and the support sleeve of a pipe-type balanced flowmeter.

[0011] To further optimize this technical solution, the driving member of a pipe-type balanced flowmeter includes a driving motor fixedly connected to the outer wall of the measuring tube and a gear sleeve fixedly sleeved on the outer wall of the support sleeve; the output end of the driving motor is along the normal direction of the support sleeve, and a driving gear is fixedly sleeved thereon; the driving gear is meshed with the gear sleeve.

[0012] To further optimize this technical solution, a first hole seat is fixed on the outer wall of the support sleeve of a pipe-type balanced flowmeter; a limiting socket is fixed on the outer wall of the action ring; a positioning bolt for connecting with the first hole seat is inserted into the limiting socket; when the positioning bolt is connected with the first hole seat, the elastic steel sheet presents a structure that extends radially corresponding to the throttle disc.

[0013] To further optimize this technical solution, a second hole seat is fixed on the outer wall of the support sleeve of a pipe-type balanced flowmeter; the second hole seat also cooperates with the positioning bolt; when the positioning bolt is connected with the second hole seat, the elastic steel sheet presents a structure corresponding to the arc of the end of the support sleeve.

[0014] To further optimize this technical solution, a conduction port is opened on the support sleeve of a pipe-type balanced flowmeter; the conduction port is correspondingly communicated with the pressure sampling port on the same side.

[0015] To further optimize this technical solution, a ceramic coating is applied on the surface of the throttle disc of a pipe-type balanced flowmeter.

[0016] The beneficial effects of the present invention are as follows:

[0017] The action ring is fixedly connected to the extension rod, one end of the elastic steel sheet is fixed to the end of the support sleeve, and the other end is fixed to the extension rod. By rotating the action ring to drive the movement of the extension rod, the arc-shaped elastic steel sheet can be gradually stretched. And since the length of the elastic steel sheet is the same as the diameter length of the throttle disc, when the elastic steel sheet is fully stretched, it can contact the surface of the throttle disc radially correspondingly; by rotating the support sleeve in the measuring tube, the fully stretched elastic steel sheet can scrape and clean the surface of the throttle disc comprehensively. This process does not require disassembling the balanced flowmeter, and the operation is simple, saving time and effort. Cleaning mechanisms are provided at both ends of the measuring tube, and the surfaces on both sides of the throttle disc can be cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 Schematic diagram of the local structure of the present invention in a clean state;

[0020] Figure 3 Schematic exploded view of the local structure of the cleaning mechanism.

[0021] In the figure, 1 is a measuring tube; 2 is a throttle disc; 3 is a pressure sampling port; 4 is a support sleeve; 5 is an elastic steel sheet; 6 is an extension rod; 7 is an action ring; 8 is a cleaning rubber strip; 9 is a sealing ring; 10 is a limit sleeve; 11 is a positioning bearing; 12 is a driving motor; 13 is a gear sleeve; 14 is a driving gear; 15 is a first hole seat; 16 is a limiting insertion sleeve; 17 is a positioning bolt; 18 is a second hole seat; 19 is a conduction port. Specific embodiments

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] As Figure 1 shown, a pipeline type balanced flowmeter includes a measuring tube 1, a throttle disc 2, and a pressure sampling port 3. Cleaning mechanisms for cleaning the surfaces of the throttle discs 2 on the same side are respectively arranged at both ends of the measuring tube 1;

[0024] As Figures 1-3 shown, the cleaning mechanism includes a support sleeve 4 rotatably sleeved in the measuring tube 1; an elastic steel sheet 5 corresponding to frictionally contacting the surface of the throttle disc 2 is arranged at one end of the support sleeve 4 close to the throttle disc 2; the elastic steel sheet 5 is in an arc shape, and the radian of the elastic steel sheet 5 corresponds to the radian of the end of the support sleeve 4; the length of the elastic steel sheet 5 is the same as the diameter length of the throttle disc 2; one end of the elastic steel sheet 5 is fixed to the end of the support sleeve 4, and the other end is fixed with an extension rod 6 for stretching the elastic steel sheet 5; an action ring 7 is coaxially and rotatably connected to the end of the support sleeve 4 away from the throttle disc 2; the action ring 7 is fixedly connected to the extension rod 6.

[0025] The action rings 7 at both ends of the cleaning mechanism can be rotatably connected to the corresponding medium pipelines, so that without dismantling the device, the rotation operation of the action rings 7 and the support sleeve 4 will not be affected.

[0026] In the normal detection state, it is connected to a differential pressure transmitter outside through the pressure sampling port 3, and the differential pressure of the medium on both sides of the throttle disc 2 in the measuring tube 1 is measured and converted to obtain data such as the volume flow rate and mass flow rate of the medium.

[0027] As Figure 1 shown, in the normal working state of the balanced flowmeter, the elastic steel sheet 5 maintains its initial state, and the elastic steel sheet 5 presents a corresponding arc shape and is hidden between the end of the support sleeve 4 and the throttle disc 2, without affecting the normal flow of the medium through the throttle disc 2.

[0028] As Figure 2 shown, when it is necessary to clean the surface of the throttle disk 2, the action ring 7 is rotated relative to the support sleeve 4, and the arc-shaped elastic steel sheet 5 is gradually stretched by the drive of the extension rod 6. When the elastic steel sheet 5 is fully extended, it will be in radial contact with the surface of the throttle disk 2. In this state, by rotating the support sleeve 4, the elastic steel sheet 5 can be driven to scrape and clean the surface of the throttle disk 2 comprehensively, so as to effectively remove the residues on the surface of the throttle disk 2.

[0029] Obviously, through the above operations, it can be found that in this solution, the throttle disk 2 can be cleaned without disassembling the flowmeter, the operation is simple and convenient, time-saving and labor-saving, and in the non-cleaning state, it will not affect the normal measurement, and the use effect is outstanding.

[0030] As Figure 3 shown, a cleaning rubber strip 8 is fixedly arranged on one side of the elastic steel sheet 5 in contact with the surface of the throttle disk 2. The flexible characteristic of the cleaning rubber strip 8 can make the contact with the surface of the throttle disk 2 closer, and improve the scraping and cleaning effect on the throttle disk 2.

[0031] As Figure 3 shown, a sealing ring 9 for sealing the gap between the measuring pipe 1 and the support sleeve 4 is sleeved and fixed on the outer side of the support sleeve 4. The sealing ring 9 can improve the sealing performance of the support sleeve 4 installed in the measuring pipe 1, and ensure that there is no leakage of the medium even when the support sleeve 4 rotates.

[0032] As Figure 2 shown, a limit sleeve 10 is sleeved and fixed on the outer wall of the measuring pipe 1; a positioning bearing 11 is sleeved and fixed in the limit sleeve 10; the inner ring of the positioning bearing 11 is sleeved and fixed on the outer wall of the support sleeve 4. The installation of the positioning bearing 11 and the limit sleeve 10 improves the coaxiality of the connection between the support sleeve 4 and the measuring pipe 1, and ensures the smooth rotation of the support sleeve 4.

[0033] A driving member for driving the support sleeve 4 to rotate is arranged between the measuring pipe 1 and the support sleeve 4. The driving member is used to control the rotation process of the support sleeve 4 to make the cleaning work of the throttle disk 2 more efficient.

[0034] As Figure 1 shown, the driving member includes a driving motor 12 fixedly connected to the outer wall of the measuring pipe 1 and a tooth sleeve 13 sleeved and fixed on the outer wall of the support sleeve 4; the output end of the driving motor 12 is along the normal direction of the support sleeve 4, and a driving gear 14 is sleeved and fixed; the driving gear 14 is meshed with the tooth sleeve 13.

[0035] The driving motor 12 drives the driving gear 14 to rotate. Through the meshing connection between the driving gear 14 and the gear sleeve 13, the support sleeve 4 can be driven to rotate, so as to realize the cleaning of the throttle disc 2 by the elastic steel sheet 5. The driving motor 12 can adopt a servo motor, a stepping motor or other structures that can accurately control the rotation process, so as to facilitate the realization of high efficiency and stability of cleaning.

[0036] As Figure 2 shown, a first hole seat 15 is fixed on the outer wall of the support sleeve 4; a limiting socket 16 is fixed on the outer wall of the acting ring 7; a positioning bolt 17 for connecting with the first hole seat 15 is inserted in the limiting socket 16; when the positioning bolt 17 is connected with the first hole seat 15, the elastic steel sheet 5 presents a structure that extends radially corresponding to the throttle disc 2.

[0037] By connecting the positioning bolt 17 with the first hole seat 15, the acting ring 7 and the support sleeve 4 can be relatively fixed, so that even when the inside cannot be observed, it is still ensured that the elastic steel sheet 5 is fully stretched and the state is effectively positioned, ensuring the stability of the subsequent cleaning state.

[0038] As Figure 1 shown, a second hole seat 18 is fixed on the outer wall of the support sleeve 4; the second hole seat 18 also cooperates with the positioning bolt 17; when the positioning bolt 17 is connected with the second hole seat 18, the elastic steel sheet 5 presents a structure corresponding to the arc at the end of the support sleeve 4.

[0039] The connection between the positioning bolt 17 and the second hole seat 18 is to ensure that the elastic steel sheet 5 can be positioned in the initial arc state, avoiding that the elastic steel sheet 5 is not positioned to the initial angle after use, which may block the passage between the throttle disc 2 and the support sleeve 4 and affect the measurement accuracy.

[0040] As Figure 3 shown, a conduction port 19 is opened on the support sleeve 4; the conduction port 19 is correspondingly communicated with the pressure sampling port 3 on the same side. When the elastic steel sheet 5 is positioned in the initial state, it is ensured that the conduction port 19 can be conducted with the internal medium through the pressure sampling port 3, effectively ensuring that the normal measurement of the flowmeter is not affected.

[0041] The surface of the throttle disc 2 is coated with a ceramic coating. The ceramic coating can improve the surface finish of the throttle disc 2 and is not easy to adhere to residues, effectively reducing the cleaning frequency and cleaning difficulty.

[0042] It is understood that the present invention is described by way of some embodiments, and those skilled in the art will be aware that, without departing from the spirit and scope of the present invention, various changes or equivalent substitutions can be made to these features and embodiments. Additionally, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A pipeline type balanced flowmeter, comprising a measuring pipe (1), a throttling disc (2), and a pressure sampling port (3), characterized in that: At both ends of the measuring tube (1), cleaning mechanisms are respectively arranged for cleaning the surface of the throttle disc (2) on the same side. The cleaning mechanism includes a support sleeve (4) rotatably sleeved in the measuring tube (1); one end of the support sleeve (4) close to the throttle disc (2) is provided with an elastic steel sheet (5) in frictional contact with the surface of the throttle disc (2); the elastic steel sheet (5) is of an arc structure, and the arc of the elastic steel sheet (5) corresponds to the arc of the end of the support sleeve (4); the length of the elastic steel sheet (5) is the same as the diameter length of the throttle disc (2); one end of the elastic steel sheet (5) is fixed to the end of the support sleeve (4), and the other end is fixed with an extension rod (6) for stretching the elastic steel sheet (5); the end of the support sleeve (4) far from the throttle disc (2) is coaxially rotatably connected with an action ring (7); the action ring (7) is fixedly connected with the extension rod (6).

2. The pipeline type balanced flowmeter according to claim 1, wherein: A cleaning rubber strip (8) is correspondingly fixed on the side of the elastic steel sheet (5) in contact with the surface of the throttle disc (2).

3. The pipeline type balanced flowmeter according to claim 1, characterized in that: A sealing ring (9) for sealing the gap between the measuring tube (1) and the support sleeve (4) is sleeved and fixed on the outer side of the support sleeve (4).

4. The pipeline type balanced flowmeter according to claim 1, characterized in that: A limit sleeve (10) is sleeved and fixed on the outer wall of the measuring tube (1); a positioning bearing (11) is sleeved and fixed in the limit sleeve (10); the inner ring of the positioning bearing (11) is sleeved and fixed on the outer wall of the support sleeve (4).

5. The pipeline type balanced flowmeter according to claim 4, wherein: A driving member is arranged between the measuring tube (1) and the support sleeve (4) for driving the support sleeve (4) to rotate.

6. The pipeline type balanced flowmeter according to claim 5, wherein: The driving member includes a driving motor (12) fixedly connected to the outer wall of the measuring tube (1) and a tooth sleeve (13) sleeved and fixed on the outer wall of the support sleeve (4); the output end of the driving motor (12) is along the normal direction of the support sleeve (4), and a driving gear (14) is sleeved and fixed thereon; the driving gear (14) is meshed with the tooth sleeve (13).

7. The pipeline type balanced flowmeter according to claim 1, characterized in that: A first hole seat (15) is fixed on the outer wall of the support sleeve (4); a limiting socket (16) is fixed on the outer wall of the action ring (7); a positioning bolt (17) for connecting with the first hole seat (15) is inserted in the limiting socket (16); when the positioning bolt (17) is connected with the first hole seat (15), the elastic steel sheet (5) presents a structure extending radially along the throttle disc (2).

8. The pipeline type balanced flowmeter according to claim 7, characterized in that: A second hole seat (18) is fixed on the outer wall of the support sleeve (4); the second hole seat (18) also cooperates with the positioning bolt (17); when the positioning bolt (17) is connected with the second hole seat (18), the elastic steel sheet (5) presents a structure corresponding to the arc of the end of the support sleeve (4).

9. The pipe-type balanced flowmeter according to claim 8, characterized in that: A conduction port (19) is formed on the support sleeve (4); the conduction port (19) is correspondingly communicated with the pressure sampling port (3) on the same side.

10. The pipeline type balanced flowmeter according to claim 1, characterized in that: The surface of the throttle disc (2) is coated with a ceramic coating.

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