CN108331788A - Pressure regulating device of external-pressure-release type circulating water pump - Google Patents

Abstract

The invention discloses an outward-leakage type circulating water pump pressure regulating device which is a hollow cylindrical barrel, wherein the cylindrical barrel comprises a cyclone pipe and a pressure regulating pipe connected with the cyclone pipe, the inner diameter of the cyclone pipe is smaller than that of the pressure regulating pipe, and a separating part for separating gas and water is arranged in the cyclone pipe; the separation component is a spiral guide vane which is fixedly connected to the inner wall of the cyclone tube; in the invention, the separation component for separating gas and water is arranged in the cyclone tube, so that water flow is forced to form spiral flow, and the purpose of separating gas and water is achieved under the action of centrifugal force; meanwhile, when the separated gas enters the pressure regulating pipe, the separated gas firstly enters the suction hole, then enters the through hole and is discharged from the front end exhaust valve or the tail end exhaust valve, the structure is simple, the vibration is not easy to generate, the noise is low, and the fluid conveying resistance is low.

Description

A leaking type circulating water pump pressure regulating device

technical field

The invention relates to the technical field of water pumps, in particular to a leaking type circulating water pump pressure regulating device.

Background technique

Bubbles are inevitably generated when the water pump is working. The vaporization pressure of clear water at room temperature is about 3.17Kpa (water temperature is 25°C). When the local pressure inside the pump is lower than the vaporization pressure, bubbles will be generated there. For cavitation.

The pressure at the inlet of the impeller is the lowest, and the cavitation phenomenon is the most serious. At the same time, the oxygen dissolved in the water will escape, so the water sent by the pump contains a lot of water bubbles. In addition, the causes of excessive air bubbles at the water pump outlet include the following reasons: the temperature of the water flow of the inlet pump increases in summer; the sealing of the water inlet and the water pipe of the water pump is not good, causing air to enter the pump; Next, the pipe wall corrodes and has holes. When these holes are exposed to the water surface, air enters the water pipe from the holes.

A large number of water bubbles are mixed with water in the pipeline. On the one hand, the gas is highly compressible, and the gas in the local flow area where the pressure suddenly increases sharply shrinks, or even annihilates. This sudden volume change in space will cause vibration and serious noise; on the other hand On the one hand, water bubbles occupy a certain amount of space in the pipe coil, which creates great dynamic resistance to fluid delivery.

Contents of the invention

The purpose of the present invention is to provide a leaking type circulating water pump pressure regulating device, which realizes the separation of gas and water, and has a simple structure, is not easy to generate vibration, has low noise, and has small fluid transport resistance.

For reaching this purpose, the present invention adopts following technical scheme:

A leaking type circulating water pump pressure regulating device, the device is a hollow cylindrical cylinder, the cylindrical cylinder includes a swirl tube and a pressure regulating tube connected to the swirl tube, the inner diameter of the swirl tube is less than The inner diameter of the pressure regulating tube, and a separation component for separating gas and water is fixedly arranged in the swirl tube;

The pressure regulating tube includes an outer cylinder wall and an inner cylinder wall, and the outer cylinder wall and the inner cylinder wall are connected by sealing plates on both sides to form a pressure regulating cavity;

A suction hole is opened on the sealing plate close to the side of the swirl tube, a trumpet-shaped injection hole is opened on the inner wall of the tube, and a through hole is opened on the outer wall of the tube. A pressure relief valve is installed;

An included angle is formed between the inner cylinder wall and the horizontal direction, and the included angle is 5° to 15°.

Optionally, the separation component is a spiral guide vane, the spiral guide vane is fixedly connected to the inner wall of the swirl tube, and the outer diameter of the spiral guide vane is 1/5 of the inner diameter of the swirl tube to 1/4.

Optionally, the separation component is an inner wall thread of the swirl tube, the inner wall thread is a triangular or rectangular right-handed thread, and the inclination angle of the inner wall thread is 50° to 60°.

Optionally, a connection part is connected between the tube wall of the swirl tube and the tube wall of the pressure regulating tube, the outer wall of the connecting part is in an outwardly expanded and rounded shape, and the swirl tube and the pressure regulating tube pass through the The above connection part is connected.

Optionally, the suction hole is opened in the sealing plate at the front end of the pressure regulating tube, and the sealing plate can be an ordinary sealing plate or an arc-shaped sealing plate.

Optionally, the sealing plate may be a trapezoidal sealing plate, the trapezoidal sealing plate is fixed on the inner cylinder wall, and the gap between the trapezoidal sealing plate and the outer cylinder wall forms a suction hole.

Optionally, an intermediate cylinder wall is provided between the outer cylinder wall and the inner cylinder wall so that the pressure regulating cavity is divided to form a first cavity and a second cavity, and the second cavity A second suction hole and a second injection hole are provided;

The front end of the first cavity is provided with a thread guide cavity, and the inner wall of the thread guide cavity is provided with a guide thread, and the guide thread is a triangular or rectangular right-handed thread, and the inclination angle of the guide thread is 50° to 60°.

Optionally, the end of the swirl pipe away from the pressure regulating pipe is connected with a front flange, and the end of the pressure regulating pipe far away from the swirl pipe is connected with an end flange.

Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

In the embodiment of the present invention, the inner diameter of the swirl tube is smaller than the inner diameter of the pressure regulating tube, and by setting a separation component for gas and water separation in the swirl tube, the water flow is forced to form a spiral flow, and under the action of centrifugal force, the gas and water are separated. The purpose of water separation; at the same time, when the separated gas enters the pressure regulating tube, it first enters the suction hole, then enters the through hole, and then is discharged from the pressure relief and exhaust valve. ; and by setting the separation part and the middle wall of the pressure regulating tube in the pressure regulating tube, the pressure regulating cavity is divided to form a multi-layer cavity. Water separation, so as to achieve better gas-water separation effect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

Fig. 1 is an axial sectional view of a pressure regulating device for a leaking circulating water pump provided in Embodiment 1 of the present invention.

Fig. 2 is a left side view of the leakage type circulating water pump pressure regulating device provided by Embodiment 1 of the present invention.

Fig. 3 is an axial sectional view of the pressure regulating device of the leakage type circulating water pump provided by the second embodiment of the present invention.

Fig. 4 is an axial cross-sectional view of a pressure regulating device for a leaking circulating water pump provided by Embodiment 3 of the present invention.

Fig. 5 is an enlarged view of the arc-shaped suction hole of the leakage type circulating water pump pressure regulating device provided by the third embodiment of the present invention.

Fig. 6 is an axial cross-sectional view of the pressure regulating device of the leakage type circulating water pump provided by the fourth embodiment of the present invention.

Fig. 7 is an enlarged view of the trapezoidal suction hole of the leakage type circulating water pump pressure regulating device provided by Embodiment 4 of the present invention.

Fig. 8 is an axial sectional view of the pressure regulating device of the leakage type circulating water pump provided by Embodiment 5 of the present invention.

Illustration: front flange 1; swirl tube 2; separation part 3; connection part 4; sealing plate 5; suction hole 6; through hole 7; front exhaust valve 8; terminal exhaust valve 9; outer cylinder wall 10; end flange 11; inner cylinder wall 12; injection hole 13; pressure regulating cavity 14; pressure regulating tube 15; included angle θ; middle layer cylinder wall 21; first cavity 22; second cavity 23; The second suction hole 24; the second spray hole 25; the thread guide cavity 26.

Detailed ways

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following description The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

Embodiment one

This embodiment provides a leaking type circulating water pump pressure regulating device, which can quickly separate the water and gas in the pipeline.

Please refer to Fig. 1 and Fig. 2, in this embodiment, the leaking type circulating water pump pressure regulating device, the device is a hollow cylindrical cylinder, the cylindrical cylinder includes a swirl tube 2 and a connection to the swirl tube 2 Pressure regulating tube 15.

The inner diameter of the swirl tube 2 is smaller than the inner diameter of the pressure regulating tube 15 , and a separation component 3 for separating gas and water is fixedly arranged in the swirl tube 2 .

Specifically, the separation component 3 is a spiral guide vane, and the spiral guide vane is fixedly connected to the inner wall of the swirl tube 2 .

When the water pump works, the water in the pipeline flows from the swirl pipe 2 to the pressure regulating pipe 15 and is output from the pressure regulating pipe 15 . At this time, due to the spiral guide blades, the water flow is forced to form a spiral flow, which helps to promote the separation of gas and water under the action of centrifugal force; When passing through the pressure regulating pipe 15, the bubbles in the water flow will rise to the top, and finally the gas phase will be concentrated on the upper part of the pipe to complete the separation of gas and water.

Further, the outer diameter of the spiral guide vane is 1/5 to 1/4 of the inner diameter of the swirl tube 2, which can avoid excessive flow resistance and prevent bubbles from being generated in the negative pressure area at the end of the spiral guide vane, so that the air Better separation from water.

Furthermore, a connection part 4 is connected between the tube wall of the swirl tube 2 and the tube wall of the pressure regulating tube 15, and the connecting part 4 is in an outwardly expanded and rounded shape, through which the swirl tube 2 and the pressure regulating tube 15 are connected. Part 4 is connected. The pressure regulating tube 15 includes an inner cylinder wall 12 and an outer cylinder wall 10 , and the inner cylinder wall 12 and the outer cylinder wall 10 are connected by sealing plates 5 on both sides to form a pressure regulating cavity 14 .

A suction hole 6 is opened on the sealing plate 5 near the side of the swirl tube 2 , and the swirl tube 2 communicates with the suction hole 6 . The water flow containing a large number of air bubbles can enter the pressure regulating cavity 14 through the suction hole 6 .

A trumpet-shaped injection hole 13 is opened on the inner cylinder wall 12, and a through hole 7 is opened on the outer cylinder wall 10, and a pressure relief valve is installed on the through hole 7.

The number of through holes 7 is two, and the number of pressure relief and exhaust valves is two. The pressure relief and exhaust valve close to the swirl tube 2 is the front exhaust valve 8 , and the pressure relief and exhaust valve far away from the swirl tube 2 is the end exhaust valve 9 .

In the pressure regulating cavity 14, part of the gas enters the front end exhaust valve 8 through the through hole 7 and is discharged out of the pipe.

An included angle θ is formed between the inner cylinder wall 12 and the water flow method, so that the cross-sectional area of the pressure regulating cavity 14 along the axial direction gradually decreases, which can compensate the volume flow rate of the gas discharged by the front exhaust valve 8 and ensure pressure regulation The pressure in the cavity 14 is stable, and the included angle θ is 5° to 15°.

The remaining gas in the pressure regulating cavity 14 is discharged by the terminal exhaust valve 9, while the water phase is recirculated into the pipeline through the trumpet-shaped injection hole 13.

Specifically, the leakage type circulating water pump pressure regulating device also includes a front flange 1 and an end flange 11, the end of the swirl pipe 2 away from the pressure regulating pipe 15 is connected to the front flange 1, and the pressure regulating pipe 15 is far away from the swirl pipe. One end of 2 is connected with end flange 11.

The leakage type circulating water pump pressure regulating device provided in this embodiment can effectively separate the gas and water in the pipeline at the outlet of the water pump, and discharge the gas, reduce the resistance of air bubbles in the pipeline, improve the efficiency of water delivery, and reduce Reduce the power loss of the water pump to achieve the purpose of energy saving.

Embodiment two

Please refer to FIG. 3 , the separation component 3 is the thread on the inner wall of the swirl tube 2 .

The inner wall thread is a triangular or rectangular right-handed thread, and the inclination angle of the inner wall thread is 50° to 60°, which can avoid excessive flow resistance and make the gas and water separation effect better.

Embodiment three

Please refer to Fig. 4 and Fig. 5 , the shape of the sealing plate 5 is arc-shaped, preferably arc-shaped. The suction hole 6 is opened in the arc-shaped sealing plate 5, which can further enhance the ability to separate gas and water.

Embodiment four

Please refer to Fig. 6 and Fig. 7, the shape of the sealing plate 5 is trapezoidal, and the trapezoidal sealing plate is fixed on the inner cylinder wall, and the gap between the trapezoidal sealing plate and the outer cylinder wall forms a suction hole, which can further enhance the air intake. ability to separate from water.

Embodiment five

Referring to FIG. 8 , an intermediate cylinder wall 21 is provided between the outer cylinder wall 10 and the inner cylinder wall 12 , so that the pressure regulating cavity 14 is divided into a first cavity 22 and a second cavity 23 .

A first cavity 22 is formed between the inner tube wall 12 and the middle tube wall 21 , and a second cavity 23 is formed between the outer tube wall 10 and the middle tube wall 21 .

The second cavity 23 defines a second suction hole 24 and a second spray hole 25 . The suction hole 6 and the second suction hole 24 can be trapezoidal or arc-shaped, which can further enhance the ability to separate gas and water.

The front end of the first cavity 22 is provided with a thread guide cavity 26, and the inner wall of the thread guide cavity 26 is provided with a guide thread, the guide thread is a triangular or rectangular right-handed thread, and the inclination angle of the guide thread is 5°. ° to 60°.

The leakage-type circulating water pump pressure regulating device provided in this embodiment separates gas and water through the cooperation between the separation part 3, the suction hole 6 in the trapezoidal sealing plate, the trapezoidal second suction hole 24 and the flow guide thread, Then the gas is discharged through the pressure relief and exhaust valve, the structure is simple, it is not easy to generate vibration, the noise is small, and the fluid transmission resistance is small.

In this embodiment, according to different usage places of the water pump, a plurality of intermediate cylinder walls 21 can be arranged between the outer cylinder wall 10 and the inner cylinder wall 12, so that the pressure regulating cavity 14 is divided into multiple cavities, So as to achieve better gas-water separation effect. The number of through holes 7 in this embodiment may be one, and the number of pressure relief and exhaust valves may also be one.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (8)

1. A pressure regulating device of a leaking type circulating water pump, the device is a hollow cylindrical shell, it is characterized in that the cylindrical shell comprises a swirl tube and a pressure regulating tube connected to the swirl tube, the The inner diameter of the swirl tube is smaller than the inner diameter of the pressure regulating tube, and a separation component for separating gas and water is fixedly arranged in the swirl tube; The pressure regulating tube includes an outer cylinder wall and an inner cylinder wall, and the outer cylinder wall and the inner cylinder wall are connected by sealing plates on both sides to form a pressure regulating cavity; A suction hole is opened on the sealing plate close to the side of the swirl tube, a trumpet-shaped injection hole is opened on the inner wall of the tube, and a through hole is opened on the outer wall of the tube. A pressure relief valve is installed; A certain angle is formed between the inner cylinder wall and the horizontal direction. 2. The leaking type circulating water pump pressure regulating device according to claim 1, characterized in that, the separating part is a spiral guide vane, and the spiral guide vane is fixedly connected to the inner wall of the swirl tube, and the spiral guide vane The outer diameter of the guide vane is 1/5 to 1/4 of the inner diameter of the swirl tube. 3. The leaking type circulating water pump pressure regulating device according to claim 1, characterized in that, the separating part is the inner wall thread of the swirl pipe, and the inner wall thread is a triangular or rectangular right-handed thread, the The inclination angle of the inner wall thread is 50° to 60°. 4. The leaking type circulating water pump pressure regulating device according to claim 1, characterized in that, an intermediate cylinder wall is provided between the outer cylinder wall and the inner cylinder wall so that the pressure regulating cavity is divided A first cavity and a second cavity are formed, and the second cavity is provided with a second suction hole and a second injection hole; The front end of the first cavity and the outer cylinder wall form a thread guide cavity, and the inner wall of the thread guide cavity is provided with a guide thread, and the guide thread is a triangular or rectangular right-handed thread. The inclination angle of the thread is 50° to 60°. 5. The leaking type circulating water pump pressure regulating device according to any one of claims 1-4, characterized in that, the outer wall of the connection part between the pipe wall of the swirl tube and the pipe wall of the pressure regulating pipe is in the shape of Expanded and rounded shape. 6. The leaking type circulating water pump pressure regulating device according to any one of claims 1-4, characterized in that, the sealing plate can be a common sealing plate or an arc-shaped sealing plate. 7. The leaking type circulating water pump pressure regulating device according to any one of claims 1-4, characterized in that the sealing plate can be a trapezoidal sealing plate, and the trapezoidal sealing plate is fixed on the inner cylinder wall, The gap between the trapezoidal sealing plate and the outer cylinder wall forms a suction hole. 8. The leaking type circulating water pump pressure regulating device according to any one of claims 1-4, characterized in that, the end of the swirl pipe away from the pressure regulating pipe is connected with a front flange, and the pressure regulating The end of the tube away from the swirl tube is connected with an end flange.