CN208089603U - A circulating water pump pressure regulating device - Google Patents

Abstract

The utility model discloses a circulating water pump pressure regulating device, including hollow cylindrical barrel, cylindrical barrel includes the cyclone tube and connects the pressure regulating pipe of cyclone tube, the pressure regulating pipe includes outer section of thick bamboo wall, intermediate level section of thick bamboo wall and inlayer section of thick bamboo wall, the both ends of inlayer section of thick bamboo wall are connected with first shrouding respectively, be formed with first cavity through the first shrouding between inlayer section of thick bamboo wall and the intermediate level section of thick bamboo wall; two ends of the middle layer cylinder wall are respectively connected with a second sealing plate, and a second cavity is formed between the middle layer cylinder wall and the outer layer cylinder wall through the second sealing plates; the first sealing plate is provided with a first suction hole, the second sealing plate is provided with a second suction hole, the inner layer cylinder wall is provided with a first jet hole, and the middle layer cylinder wall is provided with a second jet hole; a through hole is formed in the wall of the outer layer cylinder, and a pressure relief exhaust valve is installed on the through hole; simple structure, difficult vibration, small noise and small fluid conveying resistance.

Description

A circulating water pump pressure regulating device

technical field

The utility model relates to the technical field of water pumps, in particular to a pressure regulating device for a circulating water pump.

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 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, resulting in air entering the pump; the water inlet pipe has long-term potential water 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.

Utility model content

The purpose of the utility model is to provide a 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 transportation resistance.

For this purpose, the utility model adopts the following technical solutions:

A pressure regulating device for a circulating water pump, comprising a hollow cylindrical cylinder, the cylindrical cylinder comprising a swirl tube and a pressure regulating tube connected to the swirl tube, the inner diameter of the swirl tube is smaller than the pressure regulating tube inner diameter of the tube;

The pressure regulating tube includes an outer wall, a middle wall and an inner wall. Both ends of the inner wall are respectively connected with first sealing plates. A first cavity is formed between the first sealing plate;

The two ends of the middle cylinder wall are respectively connected with a second sealing plate, and a second cavity is formed between the middle cylinder wall and the outer cylinder wall through the second sealing plate;

The first sealing plate close to the swirl tube is provided with a first suction hole, the second sealing plate close to the swirl tube is provided with a second suction hole, and the inner cylinder wall is provided with a first injection hole, The wall of the middle layer is provided with a second injection hole;

A through hole is opened on the outer cylinder wall, and a pressure relief and exhaust valve is installed on the through hole;

A first angle is formed between the inner cylinder wall and the horizontal direction, and the first angle is 10° to 15°, and a second angle is formed between the middle cylinder wall and the horizontal direction, so The second included angle is equal to 1/2 of the first included angle.

Optionally, 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. The inclination angle of the 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, both the first suction hole and the second suction hole are trapezoidal suction holes.

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 utility model embodiment has the following beneficial effects:

In the pressure regulating device of the circulating water pump provided by the embodiment of the utility model, the inner diameter of the swirl pipe is smaller than that of the pressure regulating pipe. By setting the first cavity and the second cavity in the pressure regulating pipe, the air bubbles in the water flow can be sucked through the first hole and the second suction hole, and then discharged from 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.

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 accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is an axial sectional view of a circulating water pump pressure regulating device provided by an embodiment of the present invention.

Illustration: front end flange 1; swirl pipe 2; connection part 4; first sealing plate 5; first suction hole 6; through hole 7; pressure relief and exhaust valve 8; outer cylinder wall 10; end flange 11; inner wall 12; first injection hole 13; pressure regulating tube 15; first included angle θ; middle wall 21; first cavity 22; second cavity 23; second suction hole 24; Two injection holes 25; thread guide cavity 26; second sealing plate 27.

Detailed ways

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

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

Please refer to Fig. 1, in the present embodiment, the circulating water pump pressure regulating device includes a hollow cylindrical shell, which includes a swirl tube 2 and a pressure regulating tube 15 connected to the swirl tube 2, and the horizontal direction is Flow from swirl pipe 2 to pressure regulating pipe 15.

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 swirl tube 2 and the pressure regulating tube 15 are connected through the connecting part 4 .

In order to separate the gas and water in the water flow more thoroughly, the inner diameter of the swirl tube 2 is smaller than that of the pressure regulating tube 15, and the connecting part 4 is in a shape of an outwardly expanded and rounded shape.

The pressure regulating tube 15 includes an outer cylinder wall 10, an intermediate cylinder wall 21 and an inner cylinder wall 12. The two ends of the inner cylinder wall 12 are respectively connected with the first sealing plate 5, the inner cylinder wall 12 and the middle cylinder wall A first cavity 22 is formed between 21 through the first sealing plate 5 . The first sealing plate 5 close to the swirl tube 2 is provided with a first suction hole 6 , and the inner cylinder wall 12 is provided with a first injection hole 13 .

Two ends of the middle cylinder wall 21 are respectively connected with a second sealing plate 27 , and a second cavity 23 is formed between the middle cylinder wall 21 and the outer cylinder wall 10 through the second sealing plate 27 . The second sealing plate 27 close to the swirl tube 2 is provided with a second suction hole 24 , and the middle wall 21 is provided with a second injection hole 25 . A through hole 7 is opened on the outer cylinder wall 10, and a pressure relief valve 8 is installed on the through hole 7.

When the water flow enters the pressure regulating pipe 15 from the swirl pipe 2 , the air bubbles in the water flow rise up and enter the first cavity 22 from the first suction hole 6 . The air bubbles entering the first cavity 22 enter the second cavity 23 through the second suction hole 24 and are finally discharged from the pressure relief and exhaust valve 8 . The water flow entering the first cavity 22 returns to the pipeline through the second spray hole 25 and the first spray hole 13 .

Furthermore, the shapes of the first suction hole 6 and the second suction hole 24 are trapezoidal, which can be realized by using trapezoidal first sealing plate 5 and second sealing plate 27 . Using the trapezoidal first suction hole 6 and the second suction hole 24 can further enhance the ability of the circulating water pump pressure regulating device 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°. Through the thread guide cavity 26 , the water flow entering the first cavity forms a helical flow, and the air bubbles therein are more likely to float up into the second cavity 23 and then be discharged from the pressure relief and exhaust valve 8 .

Specifically, a first included angle θ is formed between the inner wall 12 and the horizontal direction, and the first included angle θ is 10° to 15°, and a second included angle ( not shown in the figure), the second included angle is equal to half of the first included angle θ.

The first included angle θ makes the axial cross-sectional area of the first cavity 22 gradually decrease, which can compensate the volume flow rate of the gas sucked by the second suction hole 24 .

The second angle makes the axial cross-sectional area of the second cavity 23 gradually decrease, which can compensate the volume flow rate of the gas discharged by the pressure relief valve 8 .

Specifically, the pressure regulating device of the circulating water pump 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 end of the pressure regulating pipe 15 away from the swirl pipe 2 Connected to end flange 11.

The circulating water pump pressure regulating device provided in this embodiment separates the water and gas in the pipeline through the first cavity 22 and the second cavity 23, and the separated gas is discharged from the pressure relief and exhaust valve 8, which has a simple structure and is not easy to generate vibration , low noise, small fluid transport resistance.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it still can Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; 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 utility model .

Claims (5)

1. a kind of water circulating pump regulator, including hollow cylindrical tube, which is characterized in that the cylindrical tube includes Cyclone pipe and the surge pipe for connecting the cyclone pipe, the internal diameter of the cyclone pipe are less than the internal diameter of the surge pipe；

The surge pipe includes outer layer barrel, middle layer barrel and internal layer barrel, and the both ends of the internal layer barrel are connected separately with First sealing plate is formed with the first cavity between the internal layer barrel and middle layer barrel by first sealing plate；

The both ends of the middle layer barrel are connected separately with the second sealing plate, pass through institute between the middle layer barrel and outer layer barrel It states the second sealing plate and is formed with the second cavity；

The first inlet hole is offered close to the first sealing plate of the cyclone pipe, the is offered close to the second sealing plate of the cyclone pipe Two inlet holes offer the first spray-hole on the internal layer barrel, and the middle layer barrel offers the second spray-hole；

Through-hole is offered on the outer layer barrel, and pressure release air bleeding valve is installed on the through-hole；

The first angle is formed between the internal layer barrel and horizontal direction, first angle is 10 ° to 15 °, the centre The second angle is formed between layer barrel and horizontal direction, second angle is equal to the half of the first angle.

2. water circulating pump regulator according to claim 1, which is characterized in that the front end of first cavity is equipped with spiral shell The inner wall of line diversion cavity, the screw thread diversion chamber is equipped with water conservancy diversion screw thread, and the water conservancy diversion screw thread is triangle or rectangle right-handed thread, institute The inclination angle for stating water conservancy diversion screw thread is 50 ° to 60 °.

3. water circulating pump regulator according to claim 1, which is characterized in that the tube wall and surge pipe of the cyclone pipe Tube wall between be connected with interconnecting piece, in round shape is extended out, the cyclone pipe and surge pipe pass through the outer wall of the interconnecting piece The interconnecting piece connection.

4. water circulating pump regulator according to claim 1, which is characterized in that first inlet hole and the second sucking Hole is trapezoidal inlet hole.

5. water circulating pump regulator according to claim 1, which is characterized in that the cyclone pipe is far from the surge pipe One end be connected with front end flange, the one end of the surge pipe far from the cyclone pipe is connected with end flange.