Device for adjusting water flow of centrifugal pump

Abstract

The utility model relates to a device for adjusting water flow of a centrifugal pump, which comprises an adjusting valve, the adjusting valve is communicated with the water outlet end of the centrifugal pump and comprises a valve body, a water stop block and a rotating rod, a water volume control chamber is arranged in the valve body, the water stop block is longitudinally and slidably arranged in the water volume control chamber, and the rotating rod is arranged in the water volume control chamber. The lower end of the rotating rod is rotationally connected to the water stop block, and the upper end of the rotating rod extends out of the valve body upwards. The utility model aims to solve or at least alleviate the problems of poor construction continuity and high damage rate to equipment caused by frequent switching of a water pump in a water pumping and draining mode of the centrifugal pump, and provides a device for adjusting the water flow of the centrifugal pump.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pumping auxiliary equipment technical field especially relates to a device for centrifugal pump regulation water flow. BACKGROUND

[0002] Generally, when the centrifugal pump is used for construction dewatering, the centrifugal pump outlet is directly connected with the water outlet rubber hose, which has the characteristics of large pumping capacity and high efficiency. However, when the water collection speed of the foundation pit is less than the dewatering speed, the water quantity in the foundation pit is small, which may cause no water to be pumped. At this time, the centrifugal pump switch needs to be closed, and the dewatering is performed after the water quantity rises. The construction continuity of the centrifugal pump dewatering mode is poor, and the frequent opening and closing of the water pump will greatly increase the damage rate of the equipment. The personnel need to constantly monitor the water quantity in the foundation pit, and the water pump may be damaged due to idling. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at overcoming the defects in the prior art, solving or at least alleviating the problem of poor construction continuity of the centrifugal pump dewatering mode and high damage rate of the equipment caused by frequent opening and closing of the water pump, and providing a device for centrifugal pump regulation water flow.

[0004] The utility model is implemented through the following technical solutions:

[0005] A device for centrifugal pump regulation water flow, comprising a regulating valve, the regulating valve is communicated and arranged at the water outlet end of the centrifugal pump.

[0006] The regulating valve comprises a valve body, a water stop block and a rotating rod, a water quantity control chamber is arranged in the valve body, the water stop block is longitudinally and slidingly arranged in the water quantity control chamber, the water stop block is sealingly and slidingly attached to the inner wall of the water quantity control chamber on both sides, and the lower end of the rotating rod is rotationally connected to the water stop block and the upper end of the rotating rod extends out of the valve body.

[0007] In order to further realize the utility model, the following technical solutions can be preferably selected:

[0008] Preferably, a buffer tank is further included, the upper part of the buffer tank is communicated to the water outlet end of the centrifugal pump, and the lower part of the buffer tank is communicated to the water inlet end of the regulating valve.

[0009] Preferably, a liquid level sensor is arranged in the buffer tank, the liquid level sensor is signal connected with the centrifugal pump, and the liquid level sensor is used for controlling the opening and closing of the centrifugal pump.

[0010] Preferably, a positioning rod is arranged in the buffer tank, the liquid level sensor is installed at the lower end of the positioning rod, and the positioning rod is longitudinally and slidingly arranged on the top surface of the buffer tank.

[0011] Preferably, a linkage mechanism is arranged between the adjusting valve and the positioning rod, the linkage mechanism is used for adjusting the height position of the positioning rod, the higher the height position of the positioning rod relative to the buffer tank is when the opening amount of the adjusting valve is larger, and the lower the height position of the positioning rod relative to the buffer tank is when the opening amount of the adjusting valve is smaller.

[0012] Preferably, the linkage mechanism comprises a linkage shaft, the linkage shaft is vertically arranged outside the buffer tank and close to the adjusting valve, the linkage shaft is rotationally arranged in the buffer tank, and the upper end and the lower end of the linkage shaft are respectively in transmission connection with the positioning rod and the rotating rod.

[0013] Preferably, a first gear is rotationally arranged on the top surface of the buffer tank, the upper part of the positioning rod is threadedly sleeved with the first gear, the upper part and the lower part of the linkage shaft are respectively provided with a second gear, the second gears are in mutual engagement with the first gear, and the lower part of the linkage shaft is in transmission connection with the rotating rod through a chain transmission mechanism or a gear transmission structure.

[0014] Preferably, the linkage shaft comprises an upper shaft and a lower shaft, and a gearbox is arranged between the upper shaft and the lower shaft.

[0015] Through the above technical scheme, the beneficial effects of the utility model are as follows:

[0016] The adjusting valve is arranged at the water outlet of the centrifugal pump, the water pumping amount can be conveniently adjusted according to the size of the water amount of the foundation pit, and the situation that the water level rises and the centrifugal pump needs to be frequently closed due to too fast water pumping is avoided. The disadvantage that the water flow of the centrifugal pump cannot be adjusted is solved, and the adjusting valve can be controlled to a stable water amount of the foundation pit according to needs. The closing frequency of the centrifugal pump is reduced to a certain extent, the equipment damage caused by frequent opening and closing of the centrifugal pump is reduced, on the other hand, the construction personnel do not need to frequently start and stop the centrifugal pump, the construction is facilitated, and the manual input is reduced. ACCURACY OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is a structural sectional view of the utility model;

[0019] Figure 3 It is a structural sectional view of the utility model; Figure 2 It is an enlarged view of A in the utility model;

[0020] Figure 4 It is an enlarged view of B in the utility model; Figure 2 It is an enlarged view of B in the utility model;

[0021] 1 - valve body; 2 - water stop block; 3 - rotating rod; 4 - water amount control chamber; 5 - buffer tank; 6 - positioning rod; 7 - linkage shaft; 8 - first gear; 9 - second gear; 10 - centrifugal pump; 701 - upper shaft; 702 - lower shaft; 703 - gearbox. Detailed Implementation

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] Example 1:

[0025] like Figures 1-4 As shown, a device for regulating water flow in a centrifugal pump includes a regulating valve connected to the outlet end of the centrifugal pump 10.

[0026] The regulating valve includes a valve body 1, a water stop block 2, and a rotating rod 3. The valve body 1 is provided with a water flow control chamber 4. The water stop block 2 is longitudinally slidably installed in the water flow control chamber 4. The two sides of the water stop block 2 can be sealed and slidably fitted with the inner wall of the water flow control chamber 4. The lower end of the rotating rod 3 is rotatably connected to the water stop block 2 through a threaded structure, and the upper end extends upward out of the valve body 1.

[0027] This invention incorporates a regulating valve at the outlet of the centrifugal pump 10, allowing for convenient adjustment of the pumping volume based on the water level in the foundation pit. This avoids situations where the pumping rate is too high, necessitating frequent shutdowns of the centrifugal pump 10 to prevent water level rise. It overcomes the limitation of the centrifugal pump 10 itself being unable to regulate water flow; the outlet volume can be controlled via the regulating valve as needed, ensuring a stable water level in the foundation pit. This solution reduces the frequency of shutting down the centrifugal pump 10, minimizing equipment damage caused by frequent on / off cycles. Furthermore, it simplifies construction by eliminating the need for repeated start-stop switching of the centrifugal pump 10.

[0028] It also includes a buffer tank 5, the upper part of which is connected to the outlet of the centrifugal pump 10 and the lower part is connected to the inlet of the regulating valve.

[0029] The utility model also is provided with buffer tank 5, centrifugal pump 10 draws out water first into buffer tank 5, when the opening of regulating valve is small and centrifugal pump 10 water output is too big, avoid pipeline rupture or break centrifugal pump 10.

[0030] In order to control the opening and closing of centrifugal pump 10, liquid level sensor is arranged in buffer tank 5, liquid level sensor is signal connected with centrifugal pump 10, and liquid level sensor is used for controlling the opening and closing of centrifugal pump 10.

[0031] In the embodiment, positioning rod 6 is arranged in buffer tank 5, liquid level sensor is installed at the lower end of positioning rod 6, and positioning rod 6 is longitudinally slidably arranged on the top surface of buffer tank 5.

[0032] In order to control the opening and closing frequency of centrifugal pump 10, linkage mechanism is arranged between regulating valve and positioning rod 6, linkage mechanism is used for adjusting the height position of positioning rod 6, the greater the opening of regulating valve, the higher the height position of positioning rod 6 relative to buffer tank 5, and the smaller the opening of regulating valve, the lower the height position of positioning rod 6 relative to buffer tank 5.

[0033] In order to make positioning rod 6 have enough lifting amount when rotating rod 3 rotates, linkage shaft 7 includes upper shaft 701 and lower shaft 702, and gearbox 703 is arranged between upper shaft 701 and lower shaft 702.

[0034] In the embodiment, linkage mechanism includes linkage shaft 7, linkage shaft 7 is vertically arranged outside buffer tank 5 and close to regulating valve, linkage shaft 7 is rotatably arranged on buffer tank 5 through fixing plate and bearing, the upper end and the lower end of linkage shaft 7 are respectively in transmission connection with positioning rod 6 and rotating rod 3, the upper part of positioning rod 6 is rotatably connected with buffer tank 5 through support rod and bearing, the upper side of the top surface of buffer tank 5 is rotatably provided with first gear 8 through limiting piece, the upper part of positioning rod 6 is threadedly fitted in first gear 8, linkage shaft 7 is provided with second gear 9 at the upper part and the lower part, respectively, second gear 9 of the upper part of linkage shaft 7 is in mesh with first gear 8, and second gear 9 of the lower part of linkage shaft 7 is in transmission connection with rotating rod 3 through chain transmission mechanism or gear transmission structure.

[0035] 1-valve body;2-water stop;3-rotating rod;4-water volume control chamber;5-buffer tank;6-positioning rod;7-linkage shaft;8-first gear;9-second gear;10-centrifugal pump;701-upper shaft;702-lower shaft;703-gearbox.

[0036] When pumping construction, centrifugal pump 10 pumps water into buffer tank 5, and the water level touches liquid level sensor to control the opening and closing of centrifugal pump 10, and the water is discharged through valve body 1 connected with the lower part of buffer tank 5;During the pumping process, the opening and closing state of valve body 1 controls the water flow speed, and then adjusts the water output.

[0037] When the manual adjustment is performed, the linkage shaft 7 is in transmission with the positioning rod 6 and the rotating rod 3 through the second gear 9 arranged up and down, respectively, and the height of the liquid level sensor in the buffer tank 5 is adjusted by adjusting the water outlet speed of the valve body 1, so as to facilitate the manual adjustment of the height of the liquid level sensor.

[0038] Finally, it should be noted that: the above is only the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can be modified to the technical solutions recorded in the foregoing embodiments, or equivalent replacement of some of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A device for regulating water flow in a centrifugal pump, characterized in that, Includes a regulating valve, which is connected to the outlet end of the centrifugal pump (10); The regulating valve includes a valve body (1), a water stop block (2), and a rotating rod (3). A water volume control chamber (4) is provided inside the valve body (1). The water stop block (2) is longitudinally slidably disposed in the water volume control chamber (4). The two sides of the water stop block (2) are sealed and slidably fitted with the inner wall of the water volume control chamber (4). The lower end of the rotating rod (3) is rotatably connected to the water stop block (2) through a threaded structure, and the upper end extends upward out of the valve body (1).

2. The device for regulating water flow in a centrifugal pump according to claim 1, characterized in that, It also includes a buffer tank (5), the upper part of which is connected to the outlet of the centrifugal pump (10) and the lower part is connected to the inlet of the regulating valve.

3. The device for regulating water flow in a centrifugal pump according to claim 2, characterized in that, A liquid level sensor is installed inside the buffer tank (5). The liquid level sensor is connected to the centrifugal pump (10) and is used to control the opening and closing of the centrifugal pump (10).

4. The device for regulating water flow in a centrifugal pump according to claim 3, characterized in that, The buffer tank (5) is provided with a positioning rod (6), and the liquid level sensor is installed at the lower end of the positioning rod (6). The positioning rod (6) is longitudinally slidably disposed on the top surface of the buffer tank (5).

5. The device for regulating water flow in a centrifugal pump according to claim 4, characterized in that, A linkage mechanism is provided between the regulating valve and the positioning rod (6). The linkage mechanism is used to adjust the height position of the positioning rod (6). The larger the opening amount of the regulating valve, the higher the height position of the positioning rod (6) relative to the buffer tank (5). The smaller the opening amount of the regulating valve, the lower the height position of the positioning rod (6) relative to the buffer tank (5).

6. The device for regulating water flow in a centrifugal pump according to claim 5, characterized in that, The linkage mechanism includes a linkage shaft (7), which is vertically arranged outside the buffer tank (5) and close to the regulating valve. The linkage shaft (7) is rotatably arranged in the buffer tank (5), and the upper and lower ends of the linkage shaft (7) are respectively connected to the positioning rod (6) and the rotating rod (3).

7. The device for regulating water flow in a centrifugal pump according to claim 6, characterized in that, The buffer tank (5) is rotatably mounted on the upper side of the top surface of the first gear (8), the upper part of the positioning rod (6) is threaded onto the first gear (8), the upper and lower parts of the linkage shaft (7) are respectively provided with second gears (9), the second gear (9) meshes with the first gear (8), and the lower part of the linkage shaft (7) is connected to the rotating rod (3) through a chain drive mechanism or a gear drive structure.

8. The device for regulating water flow in a centrifugal pump according to claim 6, characterized in that, The linkage shaft (7) includes an upper shaft (701) and a lower shaft (702), and a gearbox (703) is provided between the upper shaft (701) and the lower shaft (702).

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