CN211147755U - Cavitation-resistant device of glass rotameter - Google Patents

Abstract

The utility model relates to the technical field of glass rotameters, and discloses an anti-cavitation device for glass rotameters. The anti-cavitation device for glass rotameters is provided with an inducer. The inducer is set in a spiral shape, the fluid will drive the rotating shaft to rotate, which reduces the flow rate of the fluid. The fluid after the inducer passes through the through holes opened on the impeller, which increases the resistance and friction loss of the fluid and reduces the flow of the fluid medium through the through holes. After passing through the through hole, the fluid is dispersed into multiple bundles of fluid, and the fluids colliding with each other form a turbulent flow, and the turbulent flow causes the gas bubbles precipitated in the fluid medium to burst, preventing the bubbles from entering the flow machine body. The destruction of the internal parts of the machine body can inhibit the generation of cavitation; the first magnet and the second magnet which are mutually repelling are arranged to drive the bracket to rotate, so that the pressure on the inner wall of the machine casing is uniform everywhere, so as to prevent the occurrence of cavitation.

Description

A kind of anti-cavitation device for glass rotor flowmeter

technical field

The utility model relates to the technical field of glass rotor flow meters, in particular to an anti-cavitation device for glass rotor flow meters.

Background technique

The main measuring element of the glass rotameter is a vertically installed lower and upper large conical glass tube and a float that can move up and down inside. When the fluid passes through the conical glass tube from bottom to top, a pressure difference is generated between the top and bottom of the float, and the float rises under the action of this differential pressure. When the rising force, the buoyancy and the viscous lift on the float are equal to the gravity of the float, the float is in an equilibrium position. Therefore, there is a certain proportional relationship between the fluid flow through the glass rotameter and the rising height of the float, that is, with the flow area of the glass rotameter, and the position and height of the float can be used as a flow measurement.

When the glass rotor flowmeter is in use, it is often connected to the external pipeline, and the connection is sealed by a sealing ring, but the sealing ring is used for a long time or under the influence of temperature changes, resulting in the problem of gas ingress due to poor sealing, and the glass rotor flow rate When the meter is in use, the internal liquid flow is constant, so the pressure change in the process of too fast flow rate causes cavitation inside the glass rotameter. Damaged, affecting the service life of the glass rotameter.

Utility model content

(1) Technical problems solved

In view of the deficiencies of the prior art, the utility model provides an anti-cavitation device for a glass rotor flowmeter, which has the advantages of preventing the occurrence of cavitation and solves the above problems.

(2) Technical solutions

In order to achieve the purpose of preventing the occurrence of the cavitation phenomenon, the utility model provides the following technical scheme: a glass rotor flowmeter anti-cavitation device, comprising a flowmeter body and a casing, the flowmeter body and the casing pass through Flange connection, one end of the casing away from the flowmeter body is connected with a pipe, the outer surface of the connection between the pipe and the flowmeter body is provided with a rubber sealing ring, and the outer surface of the rubber sealing ring is provided with a A set of telescopic rods, the outer surface of the telescopic rod is sleeved with a spring, the end of the telescopic rod away from the sealing ring is fixedly connected with a mounting ring, the inside of the casing is rotatably connected with a rotating shaft through a bearing seat, the rotating shaft The outer surface of the shaft is fixedly connected with an inducer, the outer surface of the shaft is sleeved with an impeller, the impeller is located below the inducer, the outer surface of the shaft is fixedly connected with an installation sleeve, and the installation sleeve is located in the Below the impeller, two symmetrical brackets are fixedly connected to the outer surface of the mounting sleeve, two first magnets are fixedly connected to the two brackets away from the mounting sleeve, and two second magnets are fixedly connected to the inner wall of the casing. Two magnets, the two second magnets are symmetrically distributed about the mounting sleeve, and the first porcelain body and the second magnet are of the same nature.

Preferably, the number of the telescopic rods is no less than four, and the telescopic rods are arranged in an annular array on the outer surface of the sealing ring.

Preferably, the inducer is spirally welded on the outer surface of the rotating shaft.

Preferably, a group of through holes are formed on the outer surface of the impeller, the through holes are evenly distributed on the outer surface of the impeller, and the number of the through holes is not less than four.

Preferably, the bracket is in a diamond shape, and the bracket and the mounting sleeve are welded.

Preferably, the first magnet is in the shape of a long strip, and the second porcelain body is in the shape of an arc, and is adapted to the casing.

(3) Beneficial effects

Compared with the prior art, the utility model provides an anti-cavitation device for a glass rotor flowmeter, which has the following beneficial effects:

(1) The anti-cavitation device of the glass rotor flowmeter is equipped with a telescopic rod. When in use, the telescopic rod makes the rubber ring closely fit the connection between the casing and the pipe under the force of the spring deformation, which solves the problem of the rubber ring. The sealing ring is easy to expand and contract under the influence of temperature, and the deformation leads to the problem of poor sealing, so as to achieve the effect of improving the sealing performance of the device.

(2) The anti-cavitation device of the glass rotor flowmeter is equipped with an inducer. When the fluid enters the casing through the pipeline, because the inducer is set in a spiral shape, the fluid will drive the rotating shaft to rotate, reducing the flow rate of the fluid. After the fluid passes through the through holes opened on the impeller, the resistance and friction loss of the fluid are increased, and the flow rate of the fluid medium passing through the through holes is reduced. And form a buffer zone and a pressure recovery zone, the turbulent flow promotes the gas bubbles precipitated in the fluid medium to rupture away from the surface of the metal parts, preventing the bubbles from exploding on the surface of the inner parts of the flow machine body, and reducing the damage to the inner parts of the flow machine body , to inhibit the generation of cavitation; the first magnet and the second magnet that repel each other are arranged to drive the bracket to rotate, drive the fluid speed in the casing, so that the pressure on the inner wall of the casing is uniform everywhere, so as to prevent the occurrence of cavitation. .

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the top-view structure schematic diagram of the mounting ring of the present invention;

3 is a schematic side view of the structure of the installation sleeve of the present invention.

In the picture: 1. Flowmeter body, 2. Chassis, 3. Pipe, 4. Rubber sealing ring, 5. Telescopic rod, 6. Spring, 7. Mounting ring, 8. Rotary shaft, 9. Inductor, 10. Through hole, 11. Impeller, 12. Mounting sleeve, 13. Bracket, 14 first magnet, 15 second magnet.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Figure 1-3, an anti-cavitation device for a glass rotor flowmeter, including a flowmeter body 1 and a casing 2, the flowmeter body 1 and the casing 2 are connected by a flange, and the casing 2 is far away from the flowmeter body 1. One end is connected with a pipe 3, the outer surface of the connection between the pipe 3 and the flowmeter body 1 is provided with a rubber sealing ring 4, the outer surface of the rubber sealing ring 4 is provided with a group of telescopic rods 5, and the outer surface of the telescopic rod 5 is sleeved with a spring 6 , the end of the telescopic rod 5 away from the sealing ring 4 is fixedly connected with a mounting ring 7, the interior of the casing 2 is rotatably connected with a rotating shaft 8 through a bearing seat, the outer surface of the rotating shaft 8 is fixedly connected with an inducer 9, and the outer surface of the rotating shaft 8 is sleeved There is an impeller 11, the impeller 11 is located below the inducer 9, the outer surface of the rotating shaft 8 is fixedly connected with an installation sleeve 12, the installation sleeve 12 is located below the impeller 11, and the outer surface of the installation sleeve 12 is fixedly connected with two symmetrical brackets 13, A first magnet 14 is fixedly connected to the two brackets 13 away from the installation sleeve 12 , and two second magnets 15 are fixedly connected to the inner wall of the casing 2 . The two second magnets 15 are symmetrically distributed about the installation sleeve 12 , and the first porcelain body 14 It is of the same nature as the second magnet 15 .

Further, the number of the telescopic rods 5 is not less than four, and the telescopic rods 5 are arranged in a ring-shaped array on the outer surface of the sealing ring 4, so that the rubber sealing ring 4 is evenly stressed, and the effect of improving the sealing performance is achieved.

Further, the inducer 9 is welded on the outer surface of the rotating shaft 8 in a spiral shape, and the working stability of the device is improved by the welding connection.

Further, a group of through holes 10 are opened on the outer surface of the impeller 11, the through holes 10 are evenly distributed on the outer surface of the impeller 11, and the number of through holes 10 is not less than four, which increases the resistance and friction loss of the fluid and reduces the fluid flow. The flow rate of the medium through the through hole 10 .

Further, the bracket 13 is rhombus-shaped, which has the effect of guiding the flow, and the bracket 13 and the installation sleeve 12 are welded to improve the working stability of the device.

Further, the first magnet 14 is elongated, the second porcelain body 15 is arc-shaped, and is matched with the casing 2 to drive the support 13 to rotate, and drive the rotational speed of the fluid in the casing 2 to make the casing 2 rotate. The pressure on the inner wall is uniform everywhere.

To sum up, the anti-cavitation device for glass rotor flowmeter is provided with a telescopic rod 5. When in use, the telescopic rod 5 connects the rubber ring 4 with the casing 2 and the pipe 3 under the deformation force of the spring 6. The rubber sealing ring 4 is easy to expand and contract under the influence of temperature, and the deformation leads to the problem of poor sealing, so as to achieve the effect of improving the sealing performance of the device.

The anti-cavitation device of the glass rotor flowmeter is provided with the inducer 9. When the fluid enters the casing 1 through the pipeline 3, because the inducer 9 is arranged in a spiral shape, the fluid will drive the rotating shaft 8 to rotate, which reduces the flow rate of the fluid. The fluid behind the inducer 9 passes through the through hole 10 opened on the impeller 11, which increases the resistance and friction loss of the fluid, and reduces the flow rate of the fluid medium passing through the through hole 10. After the fluid passes through the through hole 10, it is dispersed into multiple beams of fluid, The fluids colliding with each other form a turbulent flow, and form a buffer zone and a pressure recovery zone. The turbulent flow causes the gas bubbles precipitated in the fluid medium to burst away from the surface of the metal parts, so as to avoid the bubbles entering the flow machine body 1. Destruction of the internal parts of the flow machine body 1 inhibits the generation of cavitation; the first magnet 14 and the second magnet 15 are arranged to repel each other, the bracket 13 is driven to rotate, and the fluid speed in the casing 2 is driven, so that the casing 2 The pressure on the inner wall is uniform everywhere, so as to prevent the occurrence of cavitation.

It should be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also no Other elements expressly listed, or which are also inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides a glass rotameter cavitation prevention device, includes flowmeter body (1) and casing (2), its characterized in that: the flowmeter comprises a flowmeter body (1) and a casing (2) which are connected through flanges, wherein one end of the flowmeter body (1) far away from the casing (2) is connected with a pipeline (3), the outer surface of the joint of the pipeline (3) and the flowmeter body (1) is provided with a rubber sealing ring (4), the outer surface of the rubber sealing ring (4) is provided with a set of telescopic rod (5), the outer surface of the telescopic rod (5) is sleeved with a spring (6), one end of the telescopic rod (5) far away from the sealing ring (4) is fixedly connected with a mounting ring (7), the inside of the casing (2) is rotatably connected with a rotating shaft (8) through a bearing seat, the outer surface of the rotating shaft (8) is fixedly connected with an inducer (9), the outer surface of the rotating shaft (8) is sleeved with an impeller (11), and the impeller (11) is, the utility model discloses a rotor blade of motor, including casing (2), the outer fixed surface of pivot (8) is connected with installation cover (12), installation cover (12) are located the below of impeller (11), the outer fixed surface of installation cover (12) is connected with support (13) of two symmetries, two support (13) are kept away from the first magnet (14) of fixedly connected with of installation cover (12), two second magnet (15) of inner wall fixedly connected with of casing (2), two second magnet (15) about installation cover (12) symmetric distribution, first magnet (14) with second magnet (15) are the same sex.

2. The anti-cavitation device of a glass rotameter as set forth in claim 1, wherein: the number of the telescopic rods (5) is not less than four, and the telescopic rods (5) are arranged on the outer surface of the sealing ring (4) in an annular array.

3. The anti-cavitation device of a glass rotameter as set forth in claim 1, wherein: the inducer (9) is spirally welded on the outer surface of the rotating shaft (8).

4. The anti-cavitation device of a glass rotameter as set forth in claim 1, wherein: a group of through holes (10) are formed in the outer surface of the impeller (11), the through holes (10) are evenly distributed in the outer surface of the impeller (11), and the number of the through holes (10) is not less than four.

5. The anti-cavitation device of a glass rotameter as set forth in claim 1, wherein: the support (13) is in a diamond shape, and the support (13) and the mounting sleeve (12) are welded.

6. The anti-cavitation device of a glass rotameter as set forth in claim 1, wherein: the first magnet (14) is long and the second magnet (15) is arc-shaped and is matched with the shell (2).

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