CN110836198A

CN110836198A - Non-return device of centrifugal pump

Info

Publication number: CN110836198A
Application number: CN201911154949.6A
Authority: CN
Inventors: 龙作健; 徐伟; 马旭升; 蒲军
Original assignee: Zhaoqing Bei Xin Building Materials Co Ltd
Current assignee: Zhaoqing Bei Xin Building Materials Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-02-25

Abstract

The embodiment of the invention discloses a non-return device of a centrifugal pump, which comprises a transit water tank, wherein the water inlet end of the transit water tank is connected with a non-return pipeline, the water outlet end of the transit water tank is connected with a pump body through a water outlet pipeline, a pump body non-return structure is arranged at the joint of the pump body and the water outlet pipeline, a water level warning structure is arranged in the transit water tank, a water replenishing port is arranged on the transit water tank, the water replenishing port is connected with a water replenishing pump, the water replenishing pump is connected with the non-return pipeline through a water replenishing pipeline, the water replenishing pump is electrically connected with the water level warning structure, the pump body non-return structure connected with the transfer water tank and the pump body improves the sealing performance of the pump body, ensures the normal use of the water pump when the water pump is stopped and then started, can in time be for transit water tank moisturizing through the water level warning structure that sets up in the transit water tank, effectively avoid revealing the pump body idle running problem that causes.

Description

Non-return device of centrifugal pump

Technical Field

The embodiment of the invention relates to the technical field of centrifugal pumps, in particular to a check device of a centrifugal pump.

Background

The water pump is used for conveying water to a mixing machine, so that gypsum board mixing materials can be mixed and stirred conveniently, the water pump is a machine for conveying liquid or pressurizing liquid, the existing water pump comprises a pump shell and an impeller arranged in the pump shell, the working principle of the water pump is that the pump is filled with liquid, a motor drives an impeller to rotate at a high speed through a shaft, water in an impeller channel rotates at a high speed under the driving of the impeller to generate centrifugal force, the water is thrown to the periphery to flow into the pump shell to generate high pressure, high-pressure water flows out from a water outlet, when the liquid is thrown to the periphery from the center of the impeller, a low-pressure area is formed in the center of the impeller, the water in a water inlet pipe can enter the pump shell under the action of atmospheric pressure, the entered water can be thrown to the pump shell, and the water.

When the water pump is not used, the liquid in the conveying pipeline and the pump shell flows back under the action of gravity, the liquid in the pump shell is reduced, and air enters the pump shell along with the liquid. When the water pump works next time, the space in the pump shell needs to be refilled with liquid, air is pressed out, the liquid can be normally conveyed, and the working efficiency of the water pump is reduced.

The water pump of prior art installs the check valve at the water inlet of the inlet channel of low level groove bottom, and when the normal work of water pump stopped, the check valve was closed, keeps being filled with water or other liquid in the pipeline, need not irritate the water and can start the machine next time during operation. But the check valve can be used for a long time, the sealing is not tight, so that the liquid in the pipe leaks out, and the water still needs to be filled when the check valve is started again; even if the check valve is not sealed, particles exist in water in the low-level tank, a gap can be generated when the check valve is closed to influence the sealing effect of the check valve, so that slow leakage is caused, and water in the inlet pipe is slowly drained; finally, when the centrifugal pump has no water or insufficient water, a series of problems such as no water pumping, vibration of the pump body, aggravation of abrasion, leakage of the mechanical seal and the like are caused, so that the normal work and the service life of the pump are influenced, and the maintenance cost of the pump is increased.

Disclosure of Invention

Therefore, the embodiment of the invention provides the non-return device of the centrifugal pump, which improves the sealing performance of the pump body through the transfer water tank and the pump body non-return structure connected with the pump body, ensures the normal use of the water pump after being stopped and restarted, can timely supply water to the transfer water tank through the water level warning structure arranged in the transfer water tank, effectively avoids the problem of pump body idling caused by leakage, and solves the problem of low working efficiency of the water pump caused by air mixed in the water pump due to poor sealing of the check valve in the prior art.

In order to achieve the above object, an embodiment of the present invention provides the following:

the utility model provides a non return device of centrifugal pump, includes the transfer water tank, the end of intaking of transfer water tank is connected with the non return pipeline, the play water end of transfer water tank is connected with the pump body through outlet conduit, is located the pump body with outlet conduit's junction is provided with pump body non return structure, be provided with water level warning structure in the transfer water tank, be provided with the moisturizing mouth on the transfer water tank, the moisturizing mouth is connected with the moisturizing water pump, the moisturizing water pump pass through moisturizing pipeline with the non return pipeline is connected, the moisturizing water pump with water level warning structure electric connection.

The embodiment of the invention is further characterized in that the water level warning structure comprises an automatic warning water supplementing structure arranged inside the transit water tank and a water level observing structure arranged outside the transit water tank, the automatic warning water supplementing structure comprises a floating ball arranged in the transit water tank, the floating ball is connected with a linkage rod, a blocking cover is rotatably arranged in the transit water tank close to the water supplementing opening, the linkage rod is rotatably connected with the blocking cover, the water supplementing opening is provided with a travel switch, the blocking cover is in contact with the travel switch, and the travel switch is electrically connected with the water supplementing water pump.

The embodiment of the invention is also characterized in that the water level observation structure comprises an observation pipe which is arranged in parallel to the transit water tank, and the observation pipe is communicated with the transit water tank and provided with a plurality of water pipes.

The embodiment of the invention is further characterized in that the pump body non-return structure comprises a sealing body connected between the pump body and the water outlet pipeline, a narrow channel is arranged in the sealing body close to the water outlet pipeline, a wide channel connected with the narrow channel is arranged in the sealing body close to the pump body, a sealing ball is arranged at the joint of the narrow channel and the wide channel, and a pull-back spring connected with the sealing ball is arranged in the narrow channel.

The embodiment of the invention is further characterized in that the sealing body is provided with an adjusting rod close to the wide channel in a screwing manner, an embedded sliding groove is arranged along the circumference of the wide channel, a sealing cover is arranged in the embedded sliding groove in a sliding manner and connected with the adjusting rod, and the embedded sliding groove is provided with a receiving channel close to the adjusting rod in an extending manner.

The embodiment of the invention is further characterized in that a cleaning hole is formed in the sealing body between the sealing cover and the sealing ball, and a sealing blocking cover is screwed in the cleaning hole.

An embodiment of the invention is further characterized in that the thickness of the cover decreases from the center to the edge, and the size of the cover is larger than the size of the wide channel.

The embodiment of the invention is also characterized in that one end of the check pipeline extends into the water pool and is provided with a check valve, the periphery of the check valve is wrapped with a filtering structure connected with the check pipeline, the filtering structure comprises a sealing flange connected with the check pipeline, a filter screen frame is arranged on the sealing flange, the end surface of the filter screen frame is covered with a filter screen layer, a rotating shaft is arranged in the filter screen frame, and the rotating shaft is provided with a plurality of rotating blades.

The embodiment of the invention is further characterized in that a fiber wool layer is arranged on one end of the rotating blade far away from the rotating shaft, and the fiber wool layer is in contact with the filter screen layer.

The embodiment of the invention is further characterized in that a rubber gasket is arranged at the joint of the sealing flange and the check pipeline, and a second filter screen layer is arranged in the filter screen frame and close to the check valve.

The embodiment of the invention has the following advantages:

(1) according to the invention, through the transfer water tank arranged between the pump body and the non-return pipeline, when the pump body works, pressure difference is caused by centrifugal force of the pump body, so that water in the water tank is continuously conveyed out through the pump body;

(2) the water level warning structure is arranged in the transfer water tank, so that when the transfer water tank has a leakage problem, the non-return pipeline cannot realize a siphon function through pressure difference, and the pump body extracts water in the transfer water tank to cause the water level in the transfer water tank to drop;

(3) the pump body non-return structure is arranged at the joint of the pump body and the water outlet pipeline, on one hand, the pump body non-return structure is convenient for the disassembly and assembly work of the pump body, the occurrence of the blocking situation of the pump body is reduced, on the other hand, the sealing performance of the pump body is improved, and air is prevented from entering the centrifugal pump.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of a check structure of a pump body according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a filter structure according to an embodiment of the present invention;

in the figure:

1-a transit water tank; 2-a non-return duct; 3-a water outlet pipeline; 4-a pump body; 5-pump body non-return structure; 6-water level warning structure; 7-water replenishing port; 8-a water replenishing pump; 9-a filter structure; 10-a check valve;

501-sealing body; 502-narrow channel; 503-wide channel; 504-sealing ball; 505-a pullback spring; 506-adjusting rod; 507-embedding a sliding groove; 508-sealing the cover; 509-receiving channel; 510-cleaning the hole; 511-sealing the plugging cover;

601-floating ball; 602-a linkage bar; 603-plugging cover; 604-a travel switch; 605-a viewing tube;

901-sealing a flange; 902-a screen frame; 903-a filter screen layer; 904-rotating blades; 905-fiber wool layer; 906-a second screen layer; 907-rotating shaft.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in figure 1, the invention provides a non-return device of a centrifugal pump, which comprises a transfer water tank 1, wherein the water inlet end of the transfer water tank 1 is connected with a non-return pipeline 2, one end of the non-return pipeline 2 extends into a water tank and is provided with a non-return valve 10, the water outlet end of the transfer water tank 1 is connected with a pump body 4 through a water outlet pipeline 3, when the pump body 4 works, the centrifugal force of the pump body 4 causes pressure difference, so that water in the water tank continuously flows into the transfer water tank 1 through the non-return pipeline 2, the water in the transfer water tank 1 is conveyed out through the pump body 4, when the pump body 4 is stopped, because the water in the transfer water tank 1 has a certain height and storage capacity, even if the sealing is not tight, air can not enter the centrifugal pump, when the pump body 4 is started next time, the pressure difference is formed by starting the pump body 4, the water in, the working efficiency of the pump body 4 is improved.

But when the water tank 1 that changes appeared leaking or the pipeline appears leaking the problem with the water tank 1 junction that changes, pressure in the water tank 1 is the same with external pressure, consequently, when the pump body 4 during operation, can not cause pressure differential through pump body 4 centrifugal force, can not replenish moisture through the siphon effect between non return pipeline 2 and the water tank 1 that changes, consequently, the water reserves in the water tank 1 that changes is outwards carried through the pump body 4, when the water tank 1 that changes does not have water in, pump body 4 idles, long-time idle running causes the damage of the 4 motors of the pump body easily, influence the life of centrifugal pump.

For avoiding the pump body 4 idle running problem to appear, be provided with water level warning structure 6 in transit water tank 1, be provided with moisturizing mouth 7 on the transit water tank 1, moisturizing mouth 7 is connected with moisturizing water pump 8, moisturizing water pump 8 is connected with non return pipeline 2 through moisturizing pipeline, moisturizing

water pump

8 and 6 electric connection of water level warning structure, when the water level is lower in the transit water tank 1, through the action of the pneumatic moisturizing water pump 8 of water level warning structure 6, carry out the moisturizing in the transit water tank 1 through non return pipeline 2.

As shown in fig. 1, the water level warning structure 6 of the present invention includes an automatic warning water-replenishing structure disposed inside the transit water tank 1 and a water level observation structure disposed outside the transit water tank 1, wherein the automatic warning water-replenishing structure includes a floating ball 601 disposed inside the transit water tank 1, the floating ball 601 is connected with a linkage rod 602, a blocking cover 603 is rotatably mounted inside the transit water tank 1 near the water replenishing port 7, the linkage rod 602 is rotatably connected with the blocking cover 603, the water replenishing port 7 is mounted with a travel switch 604, the blocking cover 603 is in contact with the travel switch 604, the travel switch 604 is electrically connected with the water-replenishing pump 8, and the power-on and power-off of the water-replenishing pump 8 are controlled by the travel switch 604.

When the moisture of the transit water tank 1 is sufficient, the floating ball 601 floats on the water surface, the plugging cover 603 is driven to rotate towards the direction close to the water replenishing port 7 through the buoyancy action of the floating ball 601, so that the water replenishing port 7 is plugged and touches the travel switch 604 installed in the water replenishing port 7, the travel switch 604 controls the water replenishing water pump 8 to be not powered on, and water replenishing is not needed.

When transit water tank 1 the leakage problem appears, when making water level descend gradually in transit water tank 1, floater 601 drives the shutoff lid 603 along with the decline of water level to the direction of keeping away from moisturizing mouth 7 rotatory, shutoff lid 603 breaks away from travel switch 604's formation scope gradually, make moisturizing water pump 8 get electricity, moisturizing water pump 8 carries out the moisturizing to transit water tank 1 through non return pipeline 2, avoid taking place pump body 4 idle running phenomenon, when the water level ascends gradually in transit water tank 1, it is rotatory to being close to moisturizing mouth 7 direction to drive shutoff lid 603 through floater 601, and touch travel switch 604, make moisturizing water pump 8 cut off the power supply, stop the moisturizing.

In addition, the water level observation structure positioned outside the transit water tank 1 can visually observe the water storage amount of the transit water tank 1, the water level observation structure comprises an observation pipe 605 arranged parallel to the transit water tank 1, the observation pipe 605 and the transit water tank 1 are connected with a plurality of water inlet pipes, in addition, at least two water inlet pipes are arranged, one water inlet pipe is arranged close to the top end of the transit water tank 1, the observation pipe 605 and the transit water tank 1 are combined to form a communicating device through the water inlet pipes, the principle of the communicating device can be known, the liquid level information in the transit water tank 1 can be known through liquid level display on the observation pipe 605, the transit water tank 1 can be timely supplemented with water, and the normal work of the water pump 1 is ensured.

As shown in fig. 1 and 3, when the check pipeline 2 is used for pumping water from the water tank by the centrifugal force of the pump body 4, if more impurities exist in the water, the centrifugal pump is easily blocked, so that the pump body 4 is burnt out, and therefore, the filtering structure 9 wrapping the check valve 10 is arranged at the tail end of the check pipeline 2 in the water tank.

As shown in fig. 3, the filtering structure 9 of the present invention includes a sealing flange 901 connected to the non-return pipe 2, a rubber gasket is disposed at the connection position between the sealing flange 901 and the non-return pipe 2, the sealing flange 901 improves the connection tightness between the filtering structure 9 and the non-return pipe 2, a filter frame 902 is mounted on the sealing flange 901, a rotating shaft 907 is mounted in the filter frame 902, a plurality of rotating blades 904 are mounted on the rotating shaft 907, a fiber layer 905 is disposed on one end of the rotating blade 904 away from the rotating shaft 907, a filter screen layer 903 covers the end surface of the filter frame 902, the fiber layer 905 contacts with the filter screen layer 903, one end of the filter frame 902 away from the water inlet pipe 6 is a semi-cylindrical structure, when the water pump is started, the water flow rate near the non-return valve 7 is increased, thereby pushing the rotating blades 904 to rotate around the rotating shaft 907, because the fiber layer 905 connected to the filter screen, the impurities adsorbed on the filter screen layer 903 can be scraped off along with the rotation of the fiber layer 905 driven by the rotating blades 907, so that the filtering effect of the filter screen layer 903 is improved.

In addition, the second filter screen layer 906 with a semi-cylindrical structure is symmetrically arranged in the filter screen frame 902 along the rotating shaft 907, the second filter screen layer 906 can also drive the fiber layer 905 to be cleaned through the rotating blades 907, and the water is subjected to multi-layer filtering treatment through the second filter screen layer 906, so that the filtering effect of the filtering structure 8 is effectively improved, the water quality is improved

The filtering structure 9 is used for filtering larger particles in the water tank, so that the problem that the check valve 710 is not tightly sealed due to the fact that the particles enter the check valve 10 is solved, and in addition, the filtering structure 9 can be used for improving the water quality, so that the impurity content in the produced gypsum board is reduced, and the quality of the gypsum board is improved.

As shown in fig. 1, in order to improve the sealing effect of the pump body 4, a pump body check structure 5 is arranged at the joint of the pump body 4 and the water outlet pipeline 3.

As shown in fig. 1 and 2, the check structure 5 of the pump body of the present invention includes a sealing body 501 connected between the pump body 4 and the water outlet pipe 3, a narrow channel 502 is provided in the sealing body 501 near the water outlet pipe 3, a wide channel 503 connected to the narrow channel 502 is provided in the sealing body 501 near the pump body 4, a sealing ball 504 is provided at the connection between the narrow channel 502 and the wide channel 503, and a pull-back spring 505 connected to the sealing ball 504 is installed in the narrow channel 502.

When the pump body 4 works, water in the pipeline close to the pump body 4 starts to flow, so that the pressure in the wide channel 503 arranged close to the pump body 4 is reduced, the sealing ball 504 is driven to move towards the narrow channel 502 in the eye by the centrifugal force of the pump body 4, the narrow channel 502 is opened, water in the sealing body 501 circulates, when the pump body 4 does not work, the pressure on the two sides of the sealing ball 504 is equal, the sealing ball 504 moves towards the narrow channel 502 under the action of the pull-back spring 505, and therefore the channel opening is sealed, and the check function of the pump body 4 is achieved.

An adjusting rod 506 is screwed on the sealing body 501 close to the wide channel 503, the adjusting rod 506 is screwed on the sealing body 501 to ensure the sealing performance of the sealing body 501, an embedded sliding groove 507 is arranged along the circumference of the wide channel 503, a sealing cover 508 is arranged in the embedded sliding groove 507 in a sliding manner, the sealing cover 508 is connected with the adjusting rod 506, an accommodating channel 509 is arranged in the embedded sliding groove 507 close to the adjusting rod 506 in an extending manner, the thickness of the sealing cover 508 is gradually reduced from the center to the edge, the size of the sealing cover 508 is larger than that of the wide channel 503, and the sealing effect of the sealing cover 508 on the wide channel 503 is improved.

The adjusting rod 506 is rotated towards the outer side of the sealing body 501, the sealing cover 508 is driven to be pulled towards the accommodating channel 509 along the embedded sliding groove 507, the wide channel 503 is in a conduction state, water flows through a gap between the sealing cover 508 and the wide channel 503, large particles in water can be blocked through the sealing cover 508, and the problem that the pump body 1 is blocked and locked is avoided; the adjusting rod 506 rotates towards the inner side of the sealing body 501, the sealing cover 508 is driven to move towards the position far away from the storage channel 509 along the embedded sliding groove 507, the wide channel 503 is in a closed state, the pump body 4 is convenient to disassemble and maintain, and when the pump body 4 is not used, the sealing performance of the pump body 4 is improved.

Be provided with clean hole 510 on the seal 501 between closing cap 508 and ball sealer 504, spiral closure installs the sealed blanking cover 511 in clean hole 510, clears up the water quality residue of separation between closing cap 508 and ball sealer 504 through clean hole 510, and the maintenance of the later stage of being convenient for is clean, and then has improved gypsum board production quality.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides a non return device of centrifugal pump, includes transfer water tank (1), its characterized in that, the end of intaking of transfer water tank (1) is connected with non return pipeline (2), the play water end of transfer water tank (1) is connected with the pump body (4) through outlet conduit (3), is located the pump body (4) with the junction of outlet conduit (3) is provided with pump body non return structure (5), be provided with water level warning structure (6) in transfer water tank (1), be provided with moisturizing mouth (7) on transfer water tank (1), moisturizing mouth (7) are connected with moisturizing water pump (8), moisturizing water pump (8) through moisturizing pipeline with non return pipeline (2) are connected, moisturizing water pump (8) with water level warning structure (6) electric connection.

2. The non-return device of a centrifugal pump according to claim 1, wherein the water level warning structure (6) comprises an automatic warning water-replenishing structure provided inside the transit water tank (1) and a water level observation structure provided outside the transit water tank (1), the automatic warning water supplementing structure comprises a floating ball (601) arranged in the transit water tank (1), the floating ball (601) is connected with a linkage rod (602), a plugging cover (603) is rotatably arranged in the transit water tank (1) close to the water replenishing port (7), the linkage rod (602) is rotationally connected with the blocking cover (603), the water replenishing port (7) is provided with a travel switch (604), the blocking cover (603) is in contact with the travel switch (604), and the travel switch (604) is electrically connected with the water replenishing pump (8).

3. The non-return device of a centrifugal pump according to claim 2, characterized in that the water level observation structure comprises an observation pipe (605) installed in parallel with the intermediate water tank (1), and the observation pipe (605) is communicated with the intermediate water tank (1) by a plurality of water pipes.

4. The non-return device of a centrifugal pump according to claim 1, characterized in that the non-return structure (5) of the pump body comprises a sealing body (501) connected between the pump body (4) and the water outlet pipe (3), a narrow channel (502) is arranged in the sealing body (501) close to the water outlet pipe (3), a wide channel (503) connected with the narrow channel (502) is arranged in the sealing body (501) close to the pump body (4), a sealing ball (504) is arranged at the joint of the narrow channel (502) and the wide channel (503), and a pull-back spring (505) connected with the sealing ball (504) is arranged in the narrow channel (502).

5. The non-return device of a centrifugal pump according to claim 4, characterized in that the sealing body (501) is rotatably provided with an adjusting rod (506) close to the wide passage (503), an embedded sliding groove (507) is arranged along the circumference of the wide passage (503), a sealing cover (508) is arranged in the embedded sliding groove (507) in a sliding manner, the sealing cover (508) is connected with the adjusting rod (506), and the embedded sliding groove (507) is provided with a receiving channel (509) extending close to the adjusting rod (506).

6. A non-return device of a centrifugal pump according to claim 5, characterized in that a cleaning hole (510) is provided in the sealing body (501) between the cover (508) and the sealing ball (504), and a sealing plug (511) is screwed into the cleaning hole (510).

7. A non-return means of a centrifugal pump according to claim 5, characterized in that the thickness of the cover (508) decreases from the centre to the edge, the size of the cover (508) being larger than the size of the wide passage (503).

8. The non-return device of a centrifugal pump according to claim 1, characterized in that one end of the non-return pipeline (2) extends into the water sump and is provided with a non-return valve (10), the non-return valve (10) is wrapped and provided with a filtering structure (9) connected with the non-return pipeline (2), the filtering structure (9) comprises a sealing flange (901) connected with the non-return pipeline (2), a filter screen frame (902) is arranged on the sealing flange (901), a filter screen layer (903) covers the end surface of the filter screen frame (902), a rotating shaft (907) is arranged in the filter screen frame (902), and a plurality of rotating blades (904) are arranged on the rotating shaft (907).

9. A non-return means of a centrifugal pump according to claim 8, characterized in that a fiber fleece layer (905) is arranged on the rotating vane (904) at the end remote from the rotating shaft (903), said fiber fleece layer (905) being in contact with the filter screen layer (903).

10. Non-return device of a centrifugal pump according to claim 8, characterized in that a rubber gasket is arranged at the connection of the sealing flange (901) and the non-return pipe (2), and a second screen layer (906) is arranged in the screen frame (902) next to the non-return valve (10).