Anti-cavitation device for boiler feed pump

Abstract

The utility model relates to the technical field of boiler water supply systems, in particular to a boiler water supply pump anti-cavitation device which comprises a main body, two ends of the main body are fixedly connected with a conveying pipe and a discharge pipe assembly respectively, the top of the main body is fixedly connected with a water conveying pipeline, and a water conveying cavity and a first sleeve which are connected in a matched mode are arranged in the main body. A pipeline connected with the first sleeve is transversely arranged in the main body; and the pipeline is simultaneously connected with the conveying pipe and the discharge pipe assembly. The effect of conveying a cooling water source into the water conveying cavity is achieved through the water conveying pipeline, the effect of conveying the cooling water source into the inner sleeve is achieved through cooperation of the water conveying cavity and the first sleeve, and the effect of cooling the high-temperature water source in the pipeline is achieved through the inner sleeve; and the effect that the cooling water sources at the two ends of the inner sleeve can be rapidly discharged outwards at the same time is achieved through the circulating pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of boiler feedwater system, concretely relates to boiler feedwater pump anti cavitation device. BACKGROUND

[0002] The boiler is a kind of energy conversion equipment, and the energy input into the boiler includes chemical energy in fuel and electric energy, and the boiler outputs steam, high-temperature water or organic heat carrier with certain heat energy.Boiler is originally a container for heating water on fire, and furnace refers to the place for burning fuel, so boiler includes both boiler and furnace. The hot water or steam generated in the boiler can directly provide the required heat energy for industrial production and people's life, or can be converted into mechanical energy through steam power device, or can be converted into electric energy through generator by mechanical energy.

[0003] Since the feedwater pump transports saturated water, the head of the feedwater pump is large, and the cavitation allowance requirement is high, so the feedwater pump is prone to cavitation.Boiler feedwater is mainly to transport liquid with high temperature, and when the saturated steam pressure of the transported liquid at working temperature is higher than the pressure at the inlet of impeller, the liquid will partially vaporize, and the generated bubbles will enter the high-pressure area with the liquid from the low-pressure area, and the bubbles will shrink sharply in the high-pressure area, and the surrounding liquid will rush to the original bubble space at a very high speed, generating high-intensity shock wave, impacting impeller and pump shell. Cavitation can reduce the operating efficiency of the water pump, and even damage the water pump blades in severe cases, affecting the normal operation of the entire boiler system. However, the existing feedwater pump anti-cavitation device cannot reduce the temperature of the medium in time when vaporization occurs, and the vaporization suppression effect on the water at the pump inlet is not good.

[0004] Therefore, the utility model provides a boiler feedwater pump anti-cavitation device. UTILITY MODEL CONTENTS

[0005] The boiler feedwater pump anti-cavitation device provided by the utility model can solve the problems of the existing feedwater pump anti-cavitation device, which cannot reduce the temperature of the medium in time when vaporization occurs, and the vaporization suppression effect on the water at the pump inlet is not good.

[0006] The existing feedwater pump anti-cavitation device cannot reduce the temperature of the medium in time when vaporization occurs, and the vaporization suppression effect on the water at the pump inlet is not good.

[0007] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0008] The utility model provides a boiler feed water pump anti cavitation device, including the main part, the both ends of main part are fixedly connected with the delivery pipe and the discharge pipe assembly, the top of main part is fixedly connected with the water delivery pipeline, the inside of main part is equipped with the water delivery chamber and the first sleeve pipe of matched connection, the inside of main part is horizontally provided with the pipeline of the first sleeve pipe connection, the pipeline is connected with delivery pipe and discharge pipe assembly simultaneously, the pipeline is equipped with the inner sleeve pipe, the bottom of inner sleeve pipe is fixedly connected with the circulating pipe, the inside of inner sleeve pipe is fixedly connected with the lining and the baffle of matched setting,

[0009] The discharge pipe assembly includes a discharge pipe body and an air suction mechanism, and the air suction mechanism is fixedly connected with a second sleeve pipe at the outer end.

[0010] Further, the water delivery chamber is a cold water chamber, which is arranged in a trapezoidal shape at the upper position inside the main body, the water delivery pipeline is connected with an external cold water supply device, and the first sleeve pipe is connected vertically at the middle position of the bottom of the water delivery chamber and is in communication with the middle position of the inner sleeve pipe at the bottom end.

[0011] Further, the inner sleeve pipe is arranged horizontally along the pipeline inside the main body, the two end positions of the inner sleeve pipe are arranged outwardly expanded, the middle position is arranged horizontally contracted, the circulating pipe is provided with two groups, and is fixedly connected with the bottom positions of the two ends of the inner sleeve pipe.

[0012] Further, the baffle is arranged in an inclined manner, and there are four groups of baffles arranged at the upper and lower positions of the two ends between the inner sleeve pipe and the pipeline, and there are two groups of lining plates arranged at the upper and lower ends of the baffle and arranged on the surfaces of the inner sleeve pipe and the pipeline respectively, and the lining plate is a chloroprene rubber lining plate.

[0013] Further, the air suction mechanism is provided with a hemispherical mesh baffle at the air suction port of the top end, and the second sleeve pipe is fixedly connected with the discharge end position of the pipeline.

[0014] From the above technical scheme, the utility model has the beneficial effects that:

[0015] 1. The utility model discloses a water delivery pipeline to achieve the effect of conveying and cooling water in the water delivery chamber, and the water delivery chamber cooperates with the first sleeve pipe to achieve the effect of conveying and cooling water into the inner sleeve pipe.

[0016] 2. The utility model discloses an inner sleeve pipe to achieve the effect of cooling the high-temperature water in the pipeline, and the circulating pipe achieves the effect of rapidly discharging the cooling water at the two end positions of the inner sleeve pipe.

[0017] 3. The utility model discloses a baffle and a lining plate to ensure the stability of the inner sleeve pipe and the pipeline, effectively reduce the noise and vibration caused by cavitation in the pipeline, and avoid cavitation hazards. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0019] Figure 1 It is the overall structure front view of the present application.

[0020] Figure 2 It is the structure of the present application Figure 1 enlarged view of A;

[0021] Figure 3 It is the connection front view of the present application discharge pipe assembly.

[0022] Reference signs:

[0023] 1, main body; 2, water delivery cavity; 3, water delivery pipe; 4, first sleeve; 5, pipe; 6, delivery pipe; 7, inner sleeve; 8, circulating pipe; 9, discharge pipe assembly; 10, lining plate; 11, partition plate; 12, discharge pipe body; 13, second sleeve; 14, air suction mechanism. Specific embodiments

[0024] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, therefore only as an example, and cannot limit the protection scope of the present application.

[0025] Referring to Figures 1-3 As shown in the figure, the boiler feed water pump anti-cavitation device comprises a main body 1, the two ends of the main body 1 are fixedly connected with a delivery pipe 6 and a discharge pipe assembly 9, the top of the main body 1 is fixedly connected with a water delivery pipe 3, the inside of the main body 1 is provided with a water delivery cavity 2 and a first sleeve 4 connected in a matched manner, the inside of the main body 1 is provided with a pipe 5 connected with the first sleeve 4 in a transverse manner, the pipe 5 is connected with the delivery pipe 6 and the discharge pipe assembly 9 at the same time, the pipe 5 is provided with an inner sleeve 7, the bottom of the inner sleeve 7 is fixedly connected with a circulating pipe 8, the inside of the inner sleeve 7 is fixedly connected with a lining plate 10 and a partition plate 11 arranged in a matched manner;

[0026] The discharge pipe assembly 9 comprises a discharge pipe body 12 and an air suction mechanism 14, the outer end of the air suction mechanism 14 is fixedly connected with a second sleeve 13 at the same time.

[0027] The utility model discloses a water conveying cavity 2 sets up as cold water chamber, and its whole presents trapezoidal and sets up at the inside upper position of main body 1, and water conveying pipeline 3 is connected with external cold water supply equipment, and first sleeve pipe 4 is vertically connected to the middle position of the bottom of water conveying cavity 2, and the bottom end of first sleeve pipe 4 and the middle position of inner sleeve pipe 7 are communicated and connected, through water conveying pipeline 3, the effect of conveying cooling water source in water conveying cavity 2 is achieved, and through water conveying cavity 2 and first sleeve pipe 4, the effect of conveying cooling water source into inner sleeve pipe 7 is achieved.

[0028] The inner sleeve pipe 7 is horizontally arranged in the main body 1 along the pipeline 5, and the two ends of the inner sleeve pipe 7 are outwardly expanded, while the middle position is horizontally contracted. The circulating pipe 8 is arranged in two groups and fixedly connected to the bottom of the two ends of the inner sleeve pipe 7. The inner sleeve pipe 7 can cool the high-temperature water source in the pipeline 5, and the circulating pipe 8 can quickly discharge the cooling water source from the two ends of the inner sleeve pipe 7.

[0029] In use, the conveying pipe 6 is connected with the high-temperature liquid pipeline of the external boiler, the external cooling water source is conveyed into the water conveying cavity 2 through the water conveying pipeline 3, and the cooling water source is conveyed into the inner sleeve pipe 7 through the first sleeve pipe 4. Under the action of the first sleeve pipe 4, the cooling water source flows to the two ends of the inner sleeve pipe 7 at the same time. The cooling water source continuously absorbs heat and is discharged through the circulating pipe 8. The high-temperature liquid can be effectively cooled, and the saturated steam pressure of the liquid at the working temperature is lower than the pressure at the inlet of the external impeller, which avoids vaporization and protects the external water pump impeller from being damaged. The cooling water source at the two ends of the inner sleeve pipe 7 can be uniformly discharged to ensure the stability of cooling.

[0030] The partition plate 11 is inclined and arranged in two groups, and there are four groups in total. The partition plate 11 is arranged at the upper and lower positions of the two ends between the inner sleeve pipe 7 and the pipeline 5. The lining plate 10 is arranged in two groups and located at the upper and lower ends of the partition plate 11. The lining plate 10 is arranged on the surface of the inner sleeve pipe 7 and the pipeline 5. The lining plate 10 is made of neoprene. The partition plate 11 and the lining plate 10 can effectively reduce the noise and vibration caused by cavitation in the pipeline 5, thereby avoiding the damage caused by cavitation.

[0031] The top end of the air suction mechanism 14 is provided with a hemispherical mesh partition plate. The second sleeve pipe 13 is fixedly connected to the discharge end of the pipeline 5.

[0032] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A device for preventing cavitation in a boiler feed pump, characterized in that: The utility model provides a water supply and drainage device, including the main part (1), the both ends of main part (1) are fixedly connected with delivery pipe (6) and discharge pipe assembly (9) respectively, the top of main part (1) is fixedly connected with water supply pipeline (3), the inside of main part (1) is opened with the water supply cavity (2) and first sleeve (4) of matched connection, the inside of main part (1) is transversely provided with the pipeline (5) of being connected with first sleeve (4), pipeline (5) is connected with delivery pipe (6) and discharge pipe assembly (9) simultaneously, pipeline (5) is equipped with inner sleeve (7), the bottom of inner sleeve (7) is fixedly connected with circulating pipe (8), the inside of inner sleeve (7) is fixedly connected with the lining plate (10) and baffle (11) of matched setting, Discharge pipe assembly (9) includes discharge pipe main part (12) and air suction mechanism (14), and the outer end of air suction mechanism (14) is fixedly connected with second sleeve (13) simultaneously.

2. The boiler feed water pump anti-cavitation device of claim 1, wherein: The water supply cavity (2) is set as a cold water chamber, which is arranged in the upper part of the inside of the main body (1) in a trapezoidal shape, the water supply pipeline (3) is connected with an external cold water supply device, the first sleeve (4) is vertically connected to the middle position of the bottom of the water supply cavity (2), and the bottom end of the first sleeve (4) is in communication with the middle position of the inner sleeve (7).

3. The boiler feed water pump anti-cavitation device of claim 1, wherein: The inner sleeve (7) is arranged in the inside of the main body (1) along the pipeline (5) in a transverse direction, the two ends of the inner sleeve (7) are arranged in an outwardly expanding manner, the middle position is arranged in a horizontally closed manner, and the circulating pipe (8) is arranged in two groups and fixedly connected to the bottom positions of the two ends of the inner sleeve (7).

4. The boiler feed water pump anti-cavitation device of claim 1, wherein: The baffle (11) is arranged in an inclined manner, two groups of baffles (11) are arranged in an upper and lower position between the inner sleeve (7) and the pipeline (5), and two groups of lining plates (10) are arranged in an upper and lower position of the baffle (11) and arranged on the surfaces of the inner sleeve (7) and the pipeline (5) respectively, and the lining plate (10) is arranged as a neoprene lining plate.

5. The boiler feed pump anti-cavitation device of claim 1, wherein: The air suction mechanism (14) is provided with a hemispherical mesh baffle at the top air suction port, and the second sleeve (13) is fixedly connected to the discharge end position of the pipeline (5).

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