Horizontal centrifugal pump motor casing assembly

Abstract

The utility model provides a horizontal centrifugal pump motor casing assembly, and belongs to the technical field of water pumps. The problem that an existing machine shell is poor in structural stability is solved. The horizontal centrifugal pump motor shell assembly comprises a shell body which is horizontally arranged and an L-shaped supporting leg which is vertically arranged below the rear end of the shell body, a positioning pipe is further horizontally arranged below the shell body, and the positioning pipe is connected with the shell body through a connecting block so that a gap can exist between the positioning pipe and the shell body; the upper end of the supporting leg is pressed on the rear end face of the positioning pipe, and the supporting leg is fixedly connected with the positioning pipe through a bolt of which the rod part penetrates through the supporting leg and is screwed into the positioning pipe; a rubber cylinder is further arranged in the positioning pipe and sleeved on the bolt rod portion, and the inner side face and the outer side face of the rubber cylinder are tightly attached to the bolt rod portion and the inner side face of the positioning pipe respectively. The horizontal centrifugal pump motor casing assembly is stable in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to a horizontal centrifugal pump, in particular to a motor casing assembly of a horizontal centrifugal pump. Background Art

[0002] Horizontal centrifugal pump is a common fluid conveying equipment, widely used in industry, agriculture, construction, municipal administration and other fields.

[0003] The structure of the centrifugal pump is as disclosed in the Chinese Patent Library, a high-efficiency and energy-saving single-suction horizontal pipeline centrifugal pump (application number: 201621025181.4), including a pump body, a pump cover, a pump shaft, an impeller, a motor, a coupling, a bearing box, and a mechanical seal. The pump body is a single volute type with an inlet diameter of 150 mm and an outlet diameter of 125 mm; an inlet guide plate is provided between the inlet flange and the suction port of the pump volute, with a thickness of 2.5-3.5 mm; the impeller is a single suction type with a diameter of 370-378 mm , including 5-7 twisted blades, the blade suction surface thickness is 4.5-5.5mm, the outlet flow surface thickness is 3-4mm, and the filtration is uniform; the pump cover is a conical pump cover, and its inner cavity is provided with evenly distributed guide ribs, and one side of the pump cover is provided with a lever interface; a fully enclosed protective cover is provided around the coupling, which is surrounded by a pair of semicircular rings with closed ends, and the side edge joint is a detachable connection. The protective cover is supported by a pair of L-shaped support frames symmetrically arranged relative to the coupling and fixed to the end cover of the bearing box.

[0004] As can be seen from the above patent drawings, the rear side of the motor is supported by an L-shaped support foot, and the support foot is fixed by a single horizontally arranged bolt. In actual use, due to the vibration generated by the operation of the centrifugal pump, the above bolt is easily loosened, affecting the support effect of the motor. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a horizontal centrifugal pump motor housing assembly with a stable structure.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a horizontal centrifugal pump motor casing assembly, including a horizontally arranged casing body and a vertically arranged L-shaped supporting foot below the rear end of the casing body, characterized in that a positioning tube is also horizontally arranged below the casing body, and the axes of the positioning tube and the casing body are arranged in parallel; the positioning tube is connected to the casing body through a connecting block so that there is a gap between the positioning tube and the casing body; the upper end of the supporting foot is pressed on the rear end surface of the positioning tube, and the supporting foot is fixedly connected to the positioning tube by a bolt that passes through the supporting foot and is screwed into the positioning tube through a rod; a rubber tube is also provided in the positioning tube, the rubber tube is sleeved on the bolt rod, and the inner and outer sides of the rubber tube are respectively close to the bolt rod and the inner side of the positioning tube.

[0007] A rubber tube is arranged in the positioning tube fixed with the bolt, and the inner and outer sides of the rubber tube are respectively close to the bolt rod and the inner side of the positioning tube. This not only effectively increases the friction resistance formed between the bolt and the positioning tube, but also utilizes the elasticity of the rubber tube to buffer vibration, thereby effectively preventing the bolt from loosening and stably connecting the supporting foot and the casing body, thereby greatly enhancing the structural stability of the casing assembly.

[0008] In the above-mentioned horizontal centrifugal pump motor housing assembly, the inner hole of the positioning tube is composed of a buffer hole and a threaded hole that are coaxially arranged and connected. The buffer hole is located at the rear side of the threaded hole, and the diameter of the buffer hole is larger than the diameter of the threaded hole. The bolt rod is screwed into the threaded hole, and the rubber tube is located in the buffer hole. The positioning tube is composed of a buffer hole with a larger diameter and a threaded hole with a smaller diameter to provide a larger space to accommodate the rubber tube. In this way, the wall thickness of the rubber tube can be increased in actual design to improve its buffering performance, thereby further ensuring the structural stability of the housing assembly.

[0009] In the above-mentioned horizontal centrifugal pump motor housing assembly, the rubber tube is pressed on the bottom wall of the buffer hole, so that the rubber tube is pressed into place at one time, which is convenient for assembly.

[0010] In the above-mentioned horizontal centrifugal pump motor housing assembly, glue is coated on the outer surface of the rubber tube to more securely confine the rubber tube in the positioning tube, giving full play to the buffering and anti-bolt retreat performance.

[0011] In the above-mentioned horizontal centrifugal pump motor housing assembly, a plurality of crushing grooves are provided on the inner side surface of the rubber tube, so that the rubber tube is easier to deform to enhance the buffering performance.

[0012] In the above-mentioned horizontal centrifugal pump motor housing assembly, the crush groove is in a ring shape coaxial with the rubber tube, and a plurality of crush grooves are distributed along the axial direction of the rubber tube.

[0013] In the above-mentioned horizontal centrifugal pump motor housing assembly, the axial cross-section of the crush groove is in the shape of a circular arc.

[0014] In the above-mentioned horizontal centrifugal pump motor housing assembly, the housing body is composed of a barrel and two end covers respectively fixed at both ends of the barrel, and the connecting block, the positioning pipe and the barrel are an integrated structure and are formed by casting. The above-mentioned design can further enhance the positioning strength of the support foot.

[0015] Compared with the prior art, the horizontal centrifugal pump motor housing assembly has the following advantages:

[0016] 1. A rubber tube is arranged in the positioning tube connected with the bolt, and the inner and outer sides of the rubber tube are respectively close to the bolt rod and the inner side of the positioning tube. This not only effectively increases the friction resistance formed between the bolt and the positioning tube, but also can use the elasticity of the rubber tube to buffer vibration, thereby effectively preventing the bolt from loosening and making the supporting foot and the casing body stably connected, thereby greatly enhancing the structural stability of the casing assembly.

[0017] 2. The positioning tube is composed of a buffer hole with a larger aperture and a threaded hole with a smaller aperture to provide a larger space to accommodate the rubber tube. In this way, the wall thickness of the rubber tube can be increased in the actual design to improve its buffering performance, thereby further ensuring the structural stability of the casing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of a horizontal centrifugal pump.

[0019] Figure 2 It is a schematic diagram of the connection between the support feet and the casing body.

[0020] Figure 3 It is a structural schematic diagram of the positioning tube.

[0021] In the figure, 1, casing body; 1a, barrel; 1b, end cover; 2, support foot; 3, positioning tube; 3a, buffer hole; 3b, threaded hole; 4, connecting block; 5, bolt; 6, rubber tube; 6a, crushing groove. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1 As shown, the horizontal centrifugal pump motor housing assembly includes a horizontally arranged housing body 1 and an L-shaped support foot 2 vertically arranged below the rear end of the housing body 1 .

[0024] in,

[0025] The housing body 1 is composed of a barrel 1a and two end covers 1b respectively fixed to the front and rear ends of the barrel 1a. In the actual product, the end covers 1b are fixed to the barrel 1a by a circle of screws. Figure 1 and Figure 2As shown, a positioning tube 3 is also horizontally arranged below the barrel 1a, and the axes of the positioning tube 3 and the casing body 1 are arranged in parallel. The positioning tube 3 is connected to the casing body 1 through a connecting block 4 so that there is a gap between the positioning tube 3 and the casing body 1. Preferably, the connecting block 4, the positioning tube 3 and the barrel 1a are an integrated structure and are formed by casting to ensure the connection strength and stability of the above three. Naturally, it is also possible to use both ends of the connecting block 4 to be fixedly connected to the positioning tube 3 and the barrel 1a respectively by welding.

[0026] The upper end of the support foot 2 is pressed on the rear end surface of the positioning tube 3, and the support foot 2 is fixedly connected to the positioning tube 3 through a bolt 5 whose rod passes through the support foot 2 and is screwed into the positioning tube 3. At this time, the head of the bolt 5 is tightly pressed on the rear side surface of the support foot 2. A rubber tube 6 is also provided in the positioning tube 3. The rubber tube 6 is sleeved on the rod of the bolt 5, and the inner and outer sides of the rubber tube 6 are respectively tightly attached to the rod of the bolt 5 and the inner side surface of the positioning tube 3. The rubber tube 6 is provided in the positioning tube 3 fixedly connected to the bolt 5, and the inner and outer sides of the rubber tube 6 are respectively tightly attached to the rod of the bolt 5 and the inner side surface of the positioning tube 3, which not only effectively increases the friction resistance formed between the bolt 5 and the positioning tube 3, but also can use the elasticity of the rubber tube 6 to buffer vibration, thereby effectively preventing the bolt 5 from retreating and loosening, so that the support foot 2 and the casing body 1 are stably connected, thereby greatly enhancing the structural stability of the casing assembly.

[0027] In this embodiment, if Figure 2 and Figure 3 As shown, the inner hole of the positioning tube 3 is composed of a buffer hole 3a and a threaded hole 3b which are coaxially arranged and connected, and the buffer hole 3a is located behind the threaded hole 3b. The diameter of the buffer hole 3a is larger than that of the threaded hole 3b, the rod of the bolt 5 is screwed into the threaded hole 3b, and the rubber tube 6 is located in the buffer hole 3a. The positioning tube 3 is composed of a buffer hole 3a with a larger diameter and a threaded hole 3b with a smaller diameter, so as to provide a larger space to accommodate the rubber tube 6. In this way, the wall thickness of the rubber tube 6 can be increased in actual design to improve its buffering performance, thereby further ensuring the structural stability of the housing assembly.

[0028] The rubber tube 6 is pressed on the bottom wall of the buffer hole 3a, so that the rubber tube 6 is pressed into place at one time, which is convenient for assembly. Further, the outer surface of the rubber tube 6 is coated with glue to more firmly limit the rubber tube 6 in the positioning tube 3, giving full play to the buffering and anti-backward performance of the bolt 5.

[0029] In actual products, a plurality of crushing grooves 6a are provided on the inner side of the rubber tube 6, so that the rubber tube 6 is easier to deform to enhance the buffering performance. Preferably, the crushing groove 6a is annular and coaxial with the rubber tube 6, and the plurality of crushing grooves 6a are distributed along the axial direction of the rubber tube 6, and the axial cross section of the crushing groove 6a is arc-shaped.

[0030] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A horizontal centrifugal pump motor housing assembly, comprising a housing body (1) arranged horizontally and an L-shaped support foot (2) arranged vertically below the rear end of the housing body (1), characterized in that: A positioning tube (3) is also horizontally arranged below the casing body (1), and the axes of the positioning tube (3) and the casing body (1) are arranged in parallel; the positioning tube (3) is connected to the casing body (1) via a connecting block (4) so ​​that a gap exists between the positioning tube (3) and the casing body (1); the upper end of the supporting foot (2) is pressed on the rear end surface of the positioning tube (3), and the supporting foot (2) is fixedly connected to the positioning tube (3) via a bolt (5) whose rod passes through the supporting foot (2) and is screwed into the positioning tube (3); a rubber tube (6) is also arranged in the positioning tube (3), and the rubber tube (6) is sleeved on the rod of the bolt (5), and the inner and outer side surfaces of the rubber tube (6) are respectively in close contact with the rod of the bolt (5) and the inner side surface of the positioning tube (3).

2. The horizontal centrifugal pump motor housing assembly according to claim 1, characterized in that: The inner hole of the positioning tube (3) is composed of a buffer hole (3a) and a threaded hole (3b) which are coaxially arranged and connected. The buffer hole (3a) is located at the rear side of the threaded hole (3b), and the diameter of the buffer hole (3a) is larger than the diameter of the threaded hole (3b). The rod of the bolt (5) is screwed into the threaded hole (3b), and the rubber tube (6) is located in the buffer hole (3a).

3. The horizontal centrifugal pump motor housing assembly according to claim 2, characterized in that: The rubber tube (6) is pressed against the bottom wall of the buffer hole (3a).

4. The horizontal centrifugal pump motor housing assembly according to claim 1, 2 or 3, characterized in that: The outer side of the rubber tube (6) is coated with glue.

5. The horizontal centrifugal pump motor housing assembly according to claim 1, characterized in that: A plurality of crushing grooves (6a) are provided on the inner side surface of the rubber tube (6).

6. The horizontal centrifugal pump motor housing assembly according to claim 5, characterized in that: The crushing groove (6a) is in the shape of a ring coaxial with the rubber tube (6), and a plurality of crushing grooves (6a) are distributed axially along the rubber tube (6).

7. The horizontal centrifugal pump motor housing assembly according to claim 6, characterized in that: The axial cross section of the crush groove (6a) is in the shape of a circular arc.

8. The horizontal centrifugal pump motor housing assembly according to claim 1, characterized in that: The casing body (1) is composed of a barrel (1a) and two end covers (1b) respectively fixed at two ends of the barrel (1a). The connecting block (4), the positioning tube (3) and the barrel (1a) are an integrated structure and are formed by casting.

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