Horizontal multi-stage centrifugal pump

Abstract

The utility model relates to the field of multi-stage centrifugal pumps, in particular to a horizontal multi-stage centrifugal pump. A fixing mechanism is arranged at the lower part of the pump body; the fixing mechanism comprises a fixing assembly and a limiting assembly, the fixing assembly comprises an L-shaped mounting frame fixedly connected to the lower portions of the two sides of the pump body, the side face of the base is fixedly connected with a bottom plate opposite to the horizontal section of the mounting frame, a set of nuts are fixed in the inner wall of the bottom plate, and the mounting frame is connected with the nuts of the bottom plate through bolts; a clamping groove is formed in a rod body below a bolt head of the bolt, a movable cavity is formed in the horizontal section of the mounting frame, a set of limiting pieces are slidably connected into the movable cavity, one ends of the limiting pieces are clamped into the adjacent clamping grooves, the other ends of the limiting pieces are opposite, compression springs are arranged in the middles of the limiting pieces, and the limiting assembly penetrates through the horizontal section of the mounting frame and is connected with the limiting pieces. The limiting piece is driven by the compression spring to be clamped in the clamping groove of the bolt, so that the bolt is limited, and the situation that the bolt is loosened due to vibration generated when the pump body and the motor operate is prevented.

Description

Technical Field

[0001] This utility model relates to the field of multistage centrifugal pumps, and more particularly to a horizontal multistage centrifugal pump. Background Technology

[0002] Liquid transportation is a crucial link in modern industrial production and urban infrastructure construction, and is widely used in many fields such as petrochemicals, water supply and drainage, power, and metallurgy. As a highly efficient liquid transportation device, the horizontal multistage centrifugal pump plays an indispensable role in various engineering projects because it can achieve large-flow liquid transportation under high pressure.

[0003] In terms of stability, horizontal multistage centrifugal pumps generate vibration and noise during operation. The pump body and motor are usually fixed to the base with bolts. Under long-term vibration, the bolts may loosen, thus affecting the stability of the equipment. Therefore, a horizontal multistage centrifugal pump is proposed to solve the above problems. Utility Model Content

[0004] The present invention aims to solve the above problems and thus provide a horizontal multistage centrifugal pump that prevents bolts from loosening.

[0005] The technical solution adopted by this utility model to solve the aforementioned problem is:

[0006] A horizontal multistage centrifugal pump includes a base, a motor and a pump body are arranged on the upper part of the base, the output end of the motor is connected to the pump body, and a fixing mechanism is arranged on the lower part of the pump body.

[0007] The fixing mechanism includes a fixing component and a limiting component. The fixing component includes an L-shaped mounting bracket fixedly connected to the lower part of both sides of the pump body. A base plate opposite to the horizontal section of the mounting bracket is fixedly connected to the side of the base. A set of nuts is fixed in the inner wall of the base plate. The mounting bracket and the nuts of the base plate are connected by bolts. A slot is opened on the rod below the bolt head. A movable cavity is provided in the horizontal section of the mounting bracket, and a set of limiting members are slidably connected inside. One end of the limiting member is engaged in the adjacent slot, and the other end of the limiting member is opposite and a compression spring is provided in the middle. The limiting component passes through the horizontal section of the mounting bracket and is connected to the limiting member.

[0008] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0009] By using the base, pump body, and fixing mechanism together, when installing the pump body and motor, the compression spring drives the limiting component to engage in the bolt slot, thereby limiting the bolt and preventing the bolt from loosening due to vibration generated during pump body and motor operation, thus improving the stability of the device. The position of the limiting component can be adjusted by the limiting component, making it convenient to adjust or disassemble the bolt.

[0010] As a preferred embodiment, a further technical solution of this utility model is:

[0011] Furthermore, the limiting member includes a horizontal plate near the card slot side and a vertical plate away from the card slot side, the vertical plates of the two limiting members are opposite each other, and the surfaces of the vertical plates away from each other are inclined surfaces.

[0012] Furthermore, the limiting component includes an extrusion member that slides within the horizontal section of the mounting bracket and is opposite to the limiting member. A pull rod is rotatably connected to the outside of the extrusion member. A through hole is provided on the outside of the horizontal section of the mounting bracket. A sliding groove is provided on the inner side of the pull rod. An annular limiting groove is provided at the outer end of the pull rod. A positioning strip that cooperates with the sliding groove is provided in the through hole of the mounting bracket.

[0013] Furthermore, the extrusion part is U-shaped with its opening opposite to the limiting part. Movable grooves are respectively opened in the middle of the two sides of the extrusion part, which are opposite to the horizontal plate of the limiting part. Rollers that cooperate with the vertical plate of the limiting part are respectively provided at both ends of the extrusion part and on both sides of the movable groove.

[0014] Furthermore, a noise reduction component is provided on the outer side of the base. The noise reduction component includes a fixing plate, which is fixedly connected to the base and located between the motor and the pump body. A positioning pin is fixed on the side of the fixing plate away from the motor. A sound insulation box that fits on the outside of the pump body is inserted into the positioning pin. A sliding plate is detachably connected to the sound insulation box. The fixing plate and the outside of the sound insulation box are provided with buckles.

[0015] Further positioning pins are set in multiple sets.

[0016] Furthermore, the fixing plate, soundproof box, and slide are all made of soundproof material. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;

[0018] Figure 2 This is a bottom-view three-dimensional structural diagram of the nut and bolt in this utility model;

[0019] Figure 3 This is a top view of the three-dimensional structure of the mounting bracket in this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the limiting component and the extrusion component in this utility model.

[0021] Legend: 1. Base; 2. Motor; 3. Pump body; 41. Mounting bracket; 42. Base plate; 43. Nut; 44. Bolt; 45. Slot; 46. Limiting component; 47. Compression spring; 48. Extrusion component; 49. Pull rod; 5. Roller; 6. Slide groove; 71. Fixing plate; 72. Soundproof box; 73. Slide plate; 74. Buckle; 75. Positioning pin. Detailed Implementation

[0022] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0023] See Figures 1-4 A horizontal multistage centrifugal pump includes a base 1, a motor 2 and a pump body 3 are mounted on the upper part of the base 1. The base 1 serves as the basic support component of the entire centrifugal pump, providing a stable installation platform for the motor 2 and the pump body 3, ensuring that the equipment is placed stably. The output end of the motor 2 is connected to the pump body 3, and the motor 2 provides power to the centrifugal pump. The pump body 3 is responsible for realizing the liquid conveying function. A fixing mechanism is provided at the lower part of the pump body 3.

[0024] The fixing mechanism includes a fixing component and a limiting component. The fixing component includes an L-shaped mounting bracket 41 fixedly connected to the lower part of both sides of the pump body 3. A base plate 42 opposite to the horizontal section of the mounting bracket 41 is fixedly connected to the side of the base 1. A set of nuts 43 is fixed in the inner wall of the base plate 42. The mounting bracket 41 and the nuts 43 of the base plate 42 are connected by bolts 44. A slot 45 is opened on the rod below the bolt head of the bolt 44. A movable cavity is provided in the horizontal section of the mounting bracket 41, and a set of limiting members 46 are slidably connected inside. One end of the limiting member 46 is engaged in the adjacent slot 45, and the other end of the limiting member 46 is opposite and has a compression spring 47 in the middle. The limiting component passes through the horizontal section of the mounting bracket 41 and is connected to the limiting member 46. Under the elastic force of the compression spring 47, one end of the limiting member 46 is stably engaged in the slot 45, which enhances the limiting effect on the bolt 44.

[0025] Furthermore, the limiting member 46 includes a horizontal plate near the slot 45 and a vertical plate away from the slot 45. The vertical plates of the two limiting members 46 face each other, and the surfaces of the vertical plates away from each other are inclined. The limiting assembly includes a pressing member 48 that slides within the horizontal section of the mounting frame 41 and faces the limiting member 46. A pull rod 49 is rotatably connected to the outside of the pressing member 48. A through hole is provided on the outer side of the horizontal section of the mounting frame 41. A sliding groove 6 is provided on the inner side of the pull rod 49. An annular limiting groove is provided at the outer end of the pull rod 49. A positioning strip that cooperates with the sliding groove 6 is provided in the through hole of the mounting frame 41. The pressing member 48 is U-shaped and its opening faces the limiting member 46. Movable grooves are provided on the middle of the two sides of the pressing member 48, which face the horizontal plate of the limiting member 46. The movable grooves are used to accommodate the pressing member 48. The opposing limiting member 46 horizontal plate and the extrusion member 48 are respectively provided with rollers at both ends and on both sides of the movable groove, which are used to cooperate with the vertical plate of the limiting member 46. The extrusion member 48 is used to extrude the inclined surface of the vertical plate of the limiting member 46, so that the two sets of limiting members 46 move in opposite directions. The extrusion member 48 is rotatably connected to the pull rod 49. By extruding and pulling the pull rod 49, the extrusion member 48 is driven to move. When the pull rod 49 moves inward until the slide groove 6 is disengaged from the positioning strip of the mounting frame 41, the limiting groove is located in the through hole of the mounting frame 41. At this time, rotating the pull rod 49 can limit the extrusion member 48, thereby facilitating the operation of the bolt 44. The rollers 5 on the extrusion member 48 can reduce the friction between the extrusion member 48 and the vertical plate of the limiting member 46, so that the extrusion member 48 can push the limiting member 46 more smoothly.

[0026] Furthermore, a noise reduction component is provided on the outer side of the base 1. The noise reduction component includes a fixing plate 71, which provides an installation base for the soundproof box 72. The fixing plate 71 is fixedly connected to the base 1 and located between the motor 2 and the pump body 3. A positioning pin 75 is fixed on the side of the fixing plate 71 away from the motor 2. The soundproof box 72, which is fitted onto the outside of the pump body 3, is inserted into the positioning pin 75. The positioning pin 75 positions the soundproof box 72 to ensure the accuracy and stability of the installation of the soundproof box 72. The soundproof box 72 encloses and seals the pump body 3, effectively blocking the noise generated by the pump body 3 during operation from being transmitted outward. The soundproof box 72 is detachably connected to a sliding plate 73, which can be detached from the soundproof box 72. This facilitates the installation of the soundproof box 72 when installing pipes on the pump body 3. The fixing plate 71 and the outside of the soundproof box 72 are provided with buckles 74, which are used to tightly connect the fixing plate 71 and the soundproof box 72 together, enhancing the sealing of the enclosure and further improving the noise reduction effect. Multiple sets of positioning pins 75 are provided. The fixing plate 71, the soundproof box 72 and the sliding plate 73 are all made of soundproof material, which can effectively absorb and block noise and improve noise reduction performance.

[0027] Working principle: During use, pressing the pull rod 49 inward causes the extrusion piece 48 to move inward. The roller 5 on the extrusion piece 48 reduces the friction between it and the limiting piece 46, allowing the extrusion piece 48 to smoothly push the limiting piece 46 and adjust its fit with the slot 45. When the pull rod 49 moves inward until the slide 6 disengages from the positioning strip of the mounting bracket 41, the limiting slot is located in the through hole of the mounting bracket 41. At this time, rotating the pull rod 49 limits the extrusion piece 48, facilitating the operation of the bolt 44. The mounting bracket 41 is then installed on the base plate 42. Reversing the pull rod 49 releases the limitation on the extrusion piece 48, and pulling the pull rod 49 outward allows the limiting piece 46 to be inserted into the inner wall of the slot 45 of the bolt 44 under the elastic force of the compression spring 47, preventing loosening of the connection due to vibration and ensuring stable operation of the equipment.

[0028] When the pump body 3 is working, it will generate noise. First, the soundproof box 72 is inserted into the fixed plate 71 through the positioning pin 75. Multiple sets of positioning pins 75 ensure that the soundproof box 72 is installed accurately and stably. Then, the fixed plate 71 and the soundproof box 72 are tightly connected by the buckle 74 to enhance the sealing performance. The sliding plate 73 inserted into the inner wall of the soundproof box 72 can facilitate the installation and removal of the soundproof box 72 when the pump body 3 is installed with pipes. Since the fixed plate 71, the soundproof box 72 and the sliding plate 73 are all made of soundproof material, they together enclose the pump body 3, effectively absorbing and blocking the noise generated by the pump body 3 during operation, and reducing noise pollution to the surrounding environment.

[0029] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A horizontal multistage centrifugal pump, comprising a base (1), characterized in that: The base (1) is equipped with a motor (2) and a pump body (3) on the upper part. The output end of the motor (2) is connected to the pump body (3). The pump body (3) is equipped with a fixing mechanism on the lower part. The fixing mechanism includes a fixing component and a limiting component. The fixing component includes an L-shaped mounting bracket (41) fixedly connected to the lower part of both sides of the pump body (3). A base plate (42) opposite to the horizontal section of the mounting bracket (41) is fixedly connected to the side of the base (1). A set of nuts (43) is fixed in the inner wall of the base plate (42). The mounting bracket (41) and the nuts (43) of the base plate (42) are connected by bolts (44). A slot (45) is provided on the rod below the bolt head of the bolt (44). A movable cavity is provided in the horizontal section of the mounting bracket (41), and a set of limiting members (46) is slidably connected inside. One end of the limiting member (46) is engaged in the adjacent slot (45), and the other end of the limiting member (46) is opposite and a compression spring (47) is provided in the middle. The limiting component passes through the horizontal section of the mounting bracket (41) and is connected to the limiting member (46).

2. A horizontal multistage centrifugal pump according to claim 1, characterized in that: The limiting member (46) includes a horizontal plate near the slot (45) and a vertical plate away from the slot (45). The vertical plates of the two limiting members (46) are opposite each other, and the surfaces of the vertical plates away from each other are inclined surfaces.

3. A horizontal multistage centrifugal pump according to claim 2, characterized in that: The limiting component includes an extrusion member (48) that slides within the horizontal section of the mounting bracket (41) and is opposite to the limiting member (46). A pull rod (49) is rotatably connected to the outside of the extrusion member (48). A through hole is provided on the outside of the horizontal section of the mounting bracket (41). A sliding groove (6) is provided on the inner side of the pull rod (49). An annular limiting groove is provided at the outer end of the pull rod (49). A positioning strip that cooperates with the sliding groove (6) is provided in the through hole of the mounting bracket (41).

4. A horizontal multistage centrifugal pump according to claim 3, characterized in that: The extrusion piece (48) is U-shaped and its opening is opposite to the limiting piece (46). The middle part of both sides of the extrusion piece (48) is provided with movable grooves that are opposite to the horizontal plate of the limiting piece (46). Rollers that cooperate with the vertical plate of the limiting piece (46) are provided at both ends of the extrusion piece (48) and on both sides of the movable groove.

5. A horizontal multistage centrifugal pump according to claim 1, characterized in that: A noise reduction component is provided on the outside of the base (1). The noise reduction component includes a fixing plate (71). The fixing plate (71) is fixedly connected to the base (1) and located between the motor (2) and the pump body (3). A positioning pin (75) is fixed on the side of the fixing plate (71) away from the motor (2). A sound insulation box (72) fitted on the outside of the pump body (3) is inserted into the positioning pin (75). A sliding plate (73) is detachably connected to the sound insulation box (72). A buckle (74) is provided on the outside of the fixing plate (71) and the sound insulation box (72).

6. A horizontal multistage centrifugal pump according to claim 5, characterized in that: There are multiple sets of positioning pins (75).

7. A horizontal multistage centrifugal pump according to claim 5, characterized in that: The fixing plate (71), the soundproof box (72) and the sliding plate (73) are all made of soundproof material.

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