Terminal block mounting structure for horizontal centrifugal pump

Abstract

This utility model provides a junction box installation structure for a horizontal centrifugal pump, belonging to the field of water pump technology. It solves the problem of cumbersome installation of existing junction boxes. In this utility model, the centrifugal pump includes a motor barrel and several short heat sinks formed on the outer wall of the motor barrel. The junction box includes a box body, and the installation structure includes a support block horizontally formed on the outer wall of the motor barrel. The inside of the support block is a cavity communicating with the inner cavity of the motor barrel. The box body is horizontally pressed against the support block, and the support block is fixed to the middle of the bottom wall of the box body by a vertically set screw. At least one short heat sink is provided on each of the two rear ends of the support block to define a positioning area whose shape and size match the box body. The rear end of the box body is inserted into the positioning area. A wire passage is formed between the front end of the support block and the box body, allowing the cavity to communicate with the inner cavity of the box body. This junction box installation structure for the horizontal centrifugal pump is convenient to install.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology, and relates to a horizontal centrifugal pump, and more particularly to a junction box installation structure for a horizontal centrifugal pump. Background Technology

[0002] A horizontal centrifugal pump is an industrial water pump that transports liquids based on the principle of centrifugal force. Its structure is similar to a water pump with waterproof, rustproof, and freeze-crack-resistant functions disclosed in the Chinese Patent Database (application number: 201821071834.1). It includes a pump body, which comprises an end cover, a motor housing, and a motor fan cover. The end cover is detachably connected to one end of the motor housing. The end cover has an outlet and an inlet on its side wall and top, respectively. The motor housing houses a motor rotor and a motor stator. Oil seals are used to fill the connection between the motor rotor and the motor housing. An impeller is inserted into the surface of the motor rotor near the end cover and is fixedly connected. A junction box is detachably connected to the top of the motor housing, and a waterproof ring is bonded to the connection between the junction box and the motor housing. The motor fan cover is detachably connected to the other end of the motor housing, and a cooling fan is embedded inside the motor fan cover. A base plate is welded to the bottom of the pump body.

[0003] In the aforementioned water pump, the junction box is fixed to the motor housing with screws around its bottom, making the installation process quite complicated and cumbersome. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a junction box installation structure for a horizontal centrifugal pump that is easy to install.

[0005] The objective of this utility model can be achieved through the following technical solution: a junction box mounting structure for a horizontal centrifugal pump, wherein the centrifugal pump includes a motor barrel and several short heat sinks formed on the outer wall of the motor barrel, and the junction box includes a box body. The mounting structure is characterized by including a support block horizontally formed on the outer wall of the motor barrel, and the interior of the support block being a cavity communicating with the inner cavity of the motor barrel; the box body horizontally presses against the support block, and the support block is fixed to the middle of the bottom wall of the box body by a vertically installed screw; at least one of the aforementioned short heat sinks is provided on each of the rear ends of the support block to define a positioning area whose shape and size match the box body, and the rear end of the box body is inserted into the positioning area; a wiring channel is formed between the front end of the support block and the box body, allowing the aforementioned cavity to communicate with the inner cavity of the box body.

[0006] During installation, one end of the stator coil lead wire of the motor extends into the junction box through the wire passage.

[0007] The support block and part of the short heat sink form a positioning area for inserting one end of the box body to limit the box body's swing. This way, only one screw is needed to lock the box body in a stable position, which greatly reduces the assembly steps and has the advantages of easy assembly.

[0008] In the junction box installation structure of the horizontal centrifugal pump described above, a guide tube is vertically formed at the top front end of the support block, and the inner hole of the guide tube communicates with the cavity described above; a corresponding socket is formed on the box body to match the guide tube, the guide tube is inserted into the socket, and the guide tube and the socket form the aforementioned wire passage channel. With the cooperation of the guide tube and the socket, it is not only convenient to form the wire passage channel, but also to further restrict the swing of the box body and enhance the positioning effect of the junction box.

[0009] In the junction box installation structure of the horizontal centrifugal pump described above, a seal is formed between the outer wall of the conduit and the inner wall of the socket to prevent water from entering the motor barrel through the wire passage and to ensure stable operation of the motor.

[0010] In the above-mentioned junction box installation structure of the horizontal centrifugal pump, the type of socket is a stepped hole, which consists of a large hole and a small hole connected together. A rubber ring is attached to and fixed on the bottom wall of the large hole. The guide tube is inserted into the large hole and pressed against the rubber ring to form a reliable seal between the guide tube and the box body.

[0011] In the aforementioned junction box mounting structure of the horizontal centrifugal pump, the bottom of the box has a vertical through-hole for mounting screws. An annular groove coaxial with the mounting hole is formed on the bottom wall of the box. A ring-shaped sealing gasket is placed within the annular groove, with its two ends pressed against the bottom wall of the annular groove and the top wall of the support block, respectively. The mounting hole is located inside the sealing gasket. The sealing gasket ensures a reliable seal between the box and the support block at the mounting hole location.

[0012] In the junction box mounting structure of the horizontal centrifugal pump described above, the motor barrel is a single cast component.

[0013] Compared with existing technologies, the junction box mounting structure of this horizontal centrifugal pump has the following advantages:

[0014] 1. A positioning area is formed between the support block and part of the short heat sink for inserting one end of the box body to limit the box body's swing. This way, only one screw is needed to lock the box body in a stable position, which greatly reduces the assembly steps and has the advantages of convenient assembly.

[0015] 2. The short heat sink serves both as a heat sink for the motor cylinder and as a positioning element for the housing, achieving a dual-purpose effect. This simplifies the structure and facilitates assembly. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a horizontal centrifugal pump.

[0017] Figure 2 This is a schematic diagram showing the connection between the box and the support block.

[0018] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0019] Figure 4 This is a 3D schematic diagram of an electric motor.

[0020] In the diagram, 1. Motor; 1a. Motor cylinder; 1b. Short heat sink; 1c. Long heat sink; 1d. Support block; 1e. Positioning area; 1f. Conduit; 1g. Large hole; 2. Box body; 3. Screw; 4. Wiring channel; 5. Rubber ring; 6. Sealing gasket. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1 As shown, in the junction box mounting structure of this horizontal centrifugal pump, the centrifugal pump includes a motor 1, and the motor 1 includes a motor cylinder 1a. Several short heat sinks 1b and multiple long heat sinks 1c are formed on the outer wall of the motor cylinder 1a. The lengths of the short heat sinks 1b and the long heat sinks 1c extend along the axial direction of the motor cylinder 1a. The junction box includes a box body 2.

[0023] like Figure 1 , Figure 2 and Figure 4 As shown, the junction box mounting structure of this horizontal centrifugal pump includes a support block 1d horizontally formed on the outer wall of the motor barrel 1a, and the interior of the support block 1d is a cavity communicating with the inner cavity of the motor barrel 1a. The box body 2 is horizontally pressed against the support block 1d, and the support block 1d is fixed to the middle of the bottom wall of the box body 2 by a vertically installed screw 3. At least one short heat sink 1b is provided on both sides of the rear end of the support block 1d to define a positioning area 1e whose shape and size match the box body 2, and the rear end of the box body 2 is inserted into the positioning area 1e. A wire passage 4 is formed between the front end of the support block 1d and the box body 2, allowing the cavity to communicate with the inner cavity of the box body 2. Preferably, one end of the short heat sink 1b corresponding to the support block 1d extends onto the support block 1d.

[0024] During installation, one end of the stator coil lead wire of the motor extends into the junction box 2 through the wire passage 4.

[0025] A positioning area 1e is formed between the support block 1d and part of the short heat sink 1b, which allows one end of the box body 2 to be inserted to limit the swing of the box body 2. In this way, only one screw 3 needs to be tightened to stably position the box body 2, which greatly reduces the assembly steps and has the advantages of convenient assembly.

[0026] In this embodiment,

[0027] Preferably, at least two short heat sinks 1b are provided on both sides of the rear end of the support block 1d, and the short heat sinks 1b on the same side are evenly distributed along the circumference of the motor cylinder 1a. In the actual product, four short heat sinks 1b are provided on both sides of the rear end of the support block 1d.

[0028] like Figures 2 to 4 As shown, a guide tube 1f is vertically formed at the top front end of the support block 1d, and the inner hole of the guide tube 1f connects to the aforementioned cavity. A corresponding insertion hole matching the guide tube 1f is formed on the box body 2. The guide tube 1f is inserted into the insertion hole, and the aforementioned wire passage channel 4 is formed between the guide tube 1f and the insertion hole. With the cooperation of the guide tube 1f and the insertion hole, the wire passage channel 4 is easily formed, and the swing of the box body 2 is further restricted, enhancing the positioning effect of the junction box. Further explanation: a seal is formed between the outer wall of the guide tube 1f and the inner wall of the insertion hole to prevent water from entering the motor barrel 1a through the wire passage channel 4, ensuring stable motor operation. Specifically, the insertion hole is a stepped hole, consisting of a large hole 1g and a small hole connected together, with the large hole 1g located below the small hole. A rubber ring 5 is abutted and fixed to the bottom wall of the large hole 1g. The guide tube 1f is inserted into the large hole 1g and pressed against the rubber ring 5, forming a reliable seal between the guide tube 1f and the box body 2. Preferably, the rubber ring 5 is bonded and fixed to the bottom wall of the large hole 1g.

[0029] like Figure 2 and Figure 3 As shown, the screw 3 is installed as follows: The bottom of the housing 2 has a vertically penetrating mounting hole, and the support block 1d has a corresponding threaded hole. The screw 3 is vertically positioned in the mounting hole, with the shank of the screw 3 screwed into the threaded hole. Preferably, the mounting hole is a stepped hole, with the head of the screw 3 positioned inside the upper end of the mounting hole and pressed against the inner wall of the mounting hole. Further, an annular groove coaxial with the mounting hole is formed on the bottom wall of the housing 2. An annular sealing gasket 6 is provided within the annular groove, with both ends of the sealing gasket 6 pressing against the bottom wall of the annular groove and the top wall of the support block 1d, respectively. The mounting hole is located inside the sealing gasket 6. Under the action of the sealing gasket 6, a reliable seal is formed between the housing 2 at the mounting hole position and the support block 1d.

[0030] In the actual product, the motor cylinder 1a is a cast integral part.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A junction box mounting structure for a horizontal centrifugal pump, the centrifugal pump comprising a motor barrel (1a) and a plurality of short heat sinks (1b) formed on the outer wall of the motor barrel (1a), the junction box comprising a box body (2), characterized in that, The mounting structure includes a support block (1d) horizontally formed on the outer wall of the motor cylinder (1a), and the inside of the support block (1d) is a cavity that connects to the inner cavity of the motor cylinder (1a); the box body (2) is horizontally pressed against the support block (1d), and the support block (1d) is fixed to the middle of the bottom wall of the box body (2) by a vertically set screw (3); at least one of the above-mentioned short heat sinks (1b) is provided on both sides of the rear end of the support block (1d) to define a positioning area (1e) that matches the shape and size of the box body (2), and the rear end of the box body (2) is inserted into the positioning area (1e); a wire passage (4) is formed between the front end of the support block (1d) and the box body (2) to connect the above-mentioned cavity to the inner cavity of the box body (2).

2. The junction box mounting structure for the horizontal centrifugal pump according to claim 1, characterized in that, The front end of the support block (1d) is vertically formed with a conduit (1f), and the inner hole of the conduit (1f) is connected to the cavity. The box body (2) is correspondingly formed with a socket that matches the conduit (1f). The conduit (1f) is inserted into the socket, and the conduit (1f) and the socket form the wire passage (4).

3. The junction box mounting structure for the horizontal centrifugal pump according to claim 2, characterized in that, A seal is formed between the outer wall of the conduit (1f) and the inner wall of the insertion hole.

4. The junction box mounting structure for the horizontal centrifugal pump according to claim 3, characterized in that, The type of insertion hole is a stepped hole, which consists of a large hole (1g) and a small hole connected together. A rubber ring (5) is attached to and fixed on the bottom wall of the large hole (1g). The conduit (1f) is inserted into the large hole (1g) and pressed tightly on the rubber ring (5).

5. The junction box mounting structure for the horizontal centrifugal pump according to claim 1, characterized in that, The bottom of the box body (2) has a vertical through hole for mounting screws (3). The bottom wall of the box body (2) has an annular groove coaxial with the mounting hole. The annular groove has a ring-shaped sealing gasket (6). The two ends of the sealing gasket (6) are pressed against the bottom wall of the annular groove and the top wall of the support block (1d), respectively. The mounting hole is located inside the sealing gasket (6).

6. The junction box mounting structure for the horizontal centrifugal pump according to claim 1, characterized in that, The motor cylinder (1a) is a cast integral part.

Images