Double suction centrifugal pump

Abstract

The utility model relates to a kind of double-suction centrifugal pumps, it includes pump body, two water inlet pipes of pump body are equipped with shell, shell is slidably installed with movable plate in its inside by translation mechanism, two filter screens are installed on movable plate;Two sides of shell surface are all set up washing port, when movable plate is moved to the two sides in the inside of shell respectively, two filter screens are coaxial with water inlet pipe and washing port respectively corresponding to it. The position of movable plate is switched by translation mechanism, when one of filter screens is used to filter impurity in liquid, the other filter screen is at the position of washing port, so that filter screen can be cleaned under the condition that pump body does not stop, and when the position of movable plate needs to be switched, it can also be operated under the condition that it does not stop, so that enterprise production process does not need to be interrupted, avoid causing additional economic loss.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, specifically a double-suction centrifugal pump. Background Technology

[0002] The double-suction centrifugal pump is a high-flow-rate centrifugal pump with water intake from both sides of the impeller. Its core structure is a horizontal split design, with symmetrical suction inlets on both sides of the impeller, allowing liquid to enter simultaneously from both sides and then discharge along one side. This layout effectively reduces the flow velocity at the single inlet by splitting the water intake, significantly reducing hydraulic losses and the risk of cavitation. At the same time, the double-suction structure balances axial forces and extends the service life of bearings and mechanical seals.

[0003] Chinese patent CN220667958U discloses a high-efficiency double-suction centrifugal pump. This pump draws liquid through an inlet, filters it through a mesh screen, and discharges it through an outlet. Simultaneously, the drawn liquid drives a rotating shaft via impellers. The rotating shaft causes a cleaning plate to tilt and scrape away impurities clogging the filter screen surface. At the same time, the brush bristles push out smaller impurities clogging the filter screen mesh. This prevents excessive large impurities from entering the pump body and clogging the impeller. The cleaning plate and brush bristles also prevent the filter screen from becoming clogged.

[0004] Although the centrifugal pump can clean the surface of the filter screen, the impurities that are removed after cleaning will continue to adhere to the surface of the filter screen under the impact of the liquid. This is only a temporary solution. If the centrifugal pump needs to be cleaned thoroughly, it is necessary to stop the centrifugal pump and remove the pipeline to take out the filter screen for cleaning. However, stopping the centrifugal pump will interrupt the company's production process and cause additional economic losses. Utility Model Content

[0005] The purpose of this invention is to provide a double-suction centrifugal pump to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows.

[0007] A double-suction centrifugal pump includes a pump body, with a housing mounted on each of the two inlet pipes of the pump body. Inside the housing, a movable plate is slidably mounted via a translation mechanism, and two filter screens are mounted on the movable plate. Cleaning ports are provided on both sides of the housing surface. When the movable plate moves to the two sides inside the housing, the two filter screens are coaxially aligned with the inlet pipe and the cleaning port, respectively.

[0008] Therefore, by switching the position of the movable plate through the translation mechanism, when one filter screen is used to filter impurities in the liquid, the other filter screen is in the cleaning port position. This allows the filter screen to be cleaned without stopping the pump. Furthermore, when it is necessary to switch the position of the movable plate, the operation can also be carried out without stopping the machine, thus avoiding interruption of the enterprise's production process and preventing additional economic losses.

[0009] Furthermore, the translation mechanism includes a screw hole on the side of the housing, inside which a screw rod is installed. One end of the screw rod is rotatably connected to the side surface of the movable plate via a bearing. By rotating the screw rod, the movable plate can be moved back and forth, achieving the purpose of position switching.

[0010] Furthermore, the other end of the screw extends to the outside of the housing and is equipped with a handwheel. This facilitates manual rotation of the screw and reduces the chance of slippage.

[0011] Furthermore, the upper and lower inner walls of the housing are each provided with a first fixing plate and a second fixing plate, and sealing gaskets are provided on the left and right sides of the first and second fixing plates. The upper and lower sides of the movable plate are each provided with a first abutment plate, a second abutment plate, and a third abutment plate. When the movable plate moves to the right side inside the housing, the first and second abutment plates abut against the left sides of the first and second fixing plates, respectively. When the movable plate moves to the left side inside the housing, the second and third abutment plates abut against the right sides of the first and second fixing plates, respectively. When the movable plate is switched to either side of the housing, a seal is achieved, preventing liquid leakage.

[0012] Furthermore, sealing plates are bolted to the surface of the housing and the outer side of the cleaning port. This prevents external dust and impurities from entering the housing through the cleaning port and also prevents liquid leakage during the repositioning of the movable plate.

[0013] Furthermore, a connecting pipe is installed on the outlet pipe of the pump body. A valve is installed inside the connecting pipe, and a flushing hose is connected to the end of the connecting pipe. A flushing nozzle is installed at the end of the flushing hose. The filtered liquid is pumped into the flushing nozzle by the pump body to flush the filter screen, making the cleaning of the filter screen much simpler.

[0014] Furthermore, hooks are installed on the water outlet pipe. This allows the flushing hose to be neatly hung up when not in use, preventing it from becoming haphazardly scattered and improving tidiness.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0016] 1. This utility model uses a translation mechanism to switch the position of the movable plate. When one filter screen is used to filter impurities in the liquid, the other filter screen is in the cleaning port position. This allows the filter screen to be cleaned without stopping the pump. Furthermore, when it is necessary to switch the position of the movable plate, the operation can be carried out without stopping the pump, thus avoiding interruption of the enterprise's production process and preventing additional economic losses.

[0017] 2. This utility model uses a pump body to pump the filtered liquid into the flushing nozzle to flush the filter screen, making the cleaning of the filter screen simpler. Attached Figure Description

[0018] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model; Figure 2 This is the second three-dimensional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the shell structure in this utility model; Figure 4 This is a front view cross-sectional structural diagram of the shell in this utility model; Figure 5 for Figure 4 An enlarged diagram of A in the diagram.

[0019] In the diagram: 1. Pump body; 101. Inlet pipe; 102. Outlet pipe; 103. Connecting pipe; 104. Flushing hose; 105. Flushing nozzle; 106. Hook; 2. Housing; 201. Movable plate; 202. Filter screen; 203. Cleaning port; 204. First fixed plate; 205. Second fixed plate; 206. First contact plate; 207. Second contact plate; 208. Third contact plate; 209. Sealing plate; 3. Translation mechanism; 301. Screw hole; 302. Screw; 303. Bearing; 304. Handwheel. Detailed Implementation

[0020] 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 protection scope of the present utility model.

[0021] like Figure 1-5As shown, a double-suction centrifugal pump includes a pump body 1. A housing 2 is mounted on each of the two inlet pipes 101 of the pump body 1. A movable plate 201 is slidably mounted inside the housing 2 via a translation mechanism 3. Two filter screens 202 are mounted on the movable plate 201. Cleaning ports 203 are provided on both sides of the surface of the housing 2. When the movable plate 201 moves to either side of the interior of the housing 2, the two filter screens 202 are coaxially aligned with the inlet pipes 101 and the cleaning ports 203, respectively.

[0022] During operation, pump body 1 pumps liquid into the inlet pipe 101. When the liquid passes through filter screen 202, large particles are intercepted on the filter screen 202, thus preventing large particles from flowing into the pump body 1 and causing structural damage. When cleaning of filter screen 202 is required, the position of movable plate 201 is switched by translation mechanism 3, so that the filter screen 202 originally corresponding to cleaning port 203 is aligned with the inlet pipe 101, and the filter screen 202 originally corresponding to the inlet pipe 101 is aligned with the cleaning port 203. The staff can clean the filter screen 202 through the cleaning port 203, thus achieving the purpose of cleaning without stopping the machine. When it is necessary to switch the position of movable plate 201, the operation can also be carried out without stopping the machine, so as not to interrupt the enterprise's production process and avoid additional economic losses.

[0023] Preferably, the translation mechanism 3 includes a screw hole 301 opened on the side of the housing 2, and a screw 302 is installed inside the screw hole 301. One end of the screw 302 is rotatably connected to the side surface of the movable plate 201 through a bearing 303.

[0024] When the screw 302 is rotated, its end can push the movable plate 201 to move back and forth under the action of the threaded connection, thus achieving the purpose of position switching. Moreover, the threaded connection has self-locking properties, which can ensure the stability of the position after switching.

[0025] Preferably, the other end of the screw 302 extends to the outside of the housing 2 and is fitted with a handwheel 304.

[0026] The handwheel 304 allows for easy manual rotation of the screw 302, reducing the risk of slippage.

[0027] Preferably, the inner walls of both the upper and lower sides of the housing 2 are provided with a first fixing plate 204 and a second fixing plate 205, and sealing gaskets are provided on both the left and right sides of the first fixing plate 204 and the second fixing plate 205. The upper and lower sides of the movable plate 201 are provided with a first abutment plate 206, a second abutment plate 207, and a third abutment plate 208. When the movable plate 201 moves to the right side inside the housing 2, the first abutment plate 206 and the second abutment plate 207 abut against the left sides of the first fixing plate 204 and the second fixing plate 205, respectively. When the movable plate 201 moves to the left side inside the housing 2, the second abutment plate 207 and the third abutment plate 208 abut against the right sides of the first fixing plate 204 and the second fixing plate 205, respectively.

[0028] When the movable plate 201 is switched to the two sides inside the housing 2 by the screw 302, two of the first contact plate 206, the second contact plate 207 and the third contact plate 208 can abut against the first fixed plate 204 and the second fixed plate 205, and form a seal with the sealing gasket to prevent liquid leakage.

[0029] Preferably, a sealing plate 209 is bolted to the surface of the housing 2 and to the outside of the cleaning port 203.

[0030] By setting the sealing plate 209, the cleaning port 203 can be blocked to prevent external dust and impurities from entering the housing 2 through the cleaning port 203. In addition, a sealing gasket is set between the sealing plate 209 and the housing 2 to play a sealing role, which can prevent liquid leakage during the switching of the position of the movable plate 201.

[0031] Preferably, a connecting pipe 103 is installed on the outlet pipe 102 of the pump body 1, a valve is provided inside the connecting pipe 103, a flushing hose 104 is connected to the end of the connecting pipe 103, and a flushing nozzle 105 is installed at the end of the flushing hose 104.

[0032] The filtered liquid is pumped into the flushing nozzle 105 by the pump body 1 to flush the filter screen 202, making the cleaning of the filter screen 202 simpler.

[0033] Preferably, a hook 106 is installed on the water outlet pipe 102.

[0034] When the rinsing hose 104 is not in use, it can be neatly hung up to avoid being scattered and improve cleanliness.

[0035] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0036] The above is a detailed description of the present invention in conjunction with specific embodiments, and it should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, any equivalent substitutions or obvious modifications made without departing from the concept of the present invention, and which have the same performance or use, should be considered as falling within the patent protection scope defined by the submitted claims.

Claims

1. A double-suction centrifugal pump, comprising a pump body (1), characterized in that: The pump body (1) has a housing (2) installed on each of the two inlet pipes (101). Inside the housing (2), a movable plate (201) is slidably installed via a translation mechanism (3). Two filter screens (202) are installed on the movable plate (201). The shell (2) has cleaning ports (203) on both sides of its surface. When the movable plate (201) moves to the two sides inside the shell (2), the two filters (202) are coaxially aligned with the water inlet pipe (101) and the cleaning port (203).

2. The double-suction centrifugal pump according to claim 1, characterized in that: The translation mechanism (3) includes a screw hole (301) on the side of the housing (2), and a screw (302) is installed inside the screw hole (301). One end of the screw (302) is rotatably connected to the side surface of the movable plate (201) through a bearing (303).

3. A double-suction centrifugal pump according to claim 2, characterized in that: The other end of the screw (302) extends to the outside of the housing (2) and is fitted with a handwheel (304).

4. A double-suction centrifugal pump according to claim 1, characterized in that: The upper and lower inner walls of the housing (2) are provided with a first fixing plate (204) and a second fixing plate (205), and the left and right sides of the first fixing plate (204) and the second fixing plate (205) are provided with sealing gaskets. The upper and lower sides of the movable plate (201) are provided with a first contact plate (206), a second contact plate (207) and a third contact plate (208). When the movable plate (201) moves to the right side inside the housing (2), the first abutting plate (206) and the second abutting plate (207) abut against the left side of the first fixed plate (204) and the second fixed plate (205), respectively; When the movable plate (201) moves to the left side inside the housing (2), the second abutment plate (207) and the third abutment plate (208) abut against the right side of the first fixed plate (204) and the second fixed plate (205), respectively.

5. A double-suction centrifugal pump according to claim 1, characterized in that: The housing (2) surface and the outer side of the cleaning port (203) are all fitted with sealing plates (209) by bolts.

6. A double-suction centrifugal pump according to claim 1, characterized in that: A connecting pipe (103) is installed on the outlet pipe (102) of the pump body (1). A valve is installed inside the connecting pipe (103). A flushing hose (104) is connected to the end of the connecting pipe (103). A flushing nozzle (105) is installed at the end of the flushing hose (104).

7. A double-suction centrifugal pump according to claim 6, characterized in that: A hook (106) is installed on the water outlet pipe (102).

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