Pump body front end cover and pump body

Abstract

The pump body front end cover comprises an end cover body, a connecting edge is arranged on the outer edge of the end cover body, a plurality of protruding lugs are distributed on the outer edge of the connecting edge at equal intervals, the outer side of the end cover body is communicated with a liquid outlet pipe in the tangential direction, and the center of the end cover body is connected with a liquid inlet pipe. A stepped table area is formed on the inner wall of the liquid inlet pipe, a filter screen is installed on the stepped table area, a connecting flange is connected to the outer side of the liquid inlet pipe in a threaded and screwed mode, a pressing cylinder is arranged on the inner ring of the connecting flange, a fixing table is further connected to the outer wall of the liquid inlet pipe, and a threaded rod is connected to the interior of the fixing table in a threaded and screwed mode. And the outer cylinder of the connecting flange is tightly pressed along the radial direction when the screw rod is screwed. The filter screen is arranged in the liquid inlet pipe of the front end cover of the pump body, so that sucked fluid can be fully filtered, impurities are prevented from invading into the pump body to damage the impeller, and the filter screen is clamped between the liquid inlet pipe and the connecting flange and is very convenient to disassemble, assemble and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of pump bodies, in particular to a front end cover of a pump body and a pump body. Background Technique

[0002] A pump is a device that transfers mechanical energy to a fluid to enable the fluid to obtain a certain pressure or flow rate. Among them, a centrifugal pump is a widely used pump device that relies on the centrifugal force generated during the rotation of the impeller to transport liquids. The front end cover of the pump body and the pump body are the main components of the pump, and it is usually a housing that includes fluid inlets and outlets and internal fluid channels.

[0003] When the existing pump body is in use, it is not convenient to filter and remove impurities from the input fluid. When impurities are mixed in the fluid, the impurities are easily sucked into the pump body and damage the impeller, thereby reducing the service life of the pump.

[0004] Therefore, we propose a front end cover of a pump body and a pump body to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a front end cover of a pump body and a pump body to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A front end cover of a pump body includes an end cover body. A connecting edge is provided on the outer edge of the end cover body, and a number of lugs are equidistantly distributed on the outer edge of the connecting edge. A liquid outlet pipe is connected to the outside of the end cover body along the tangential direction, and a liquid inlet pipe is connected to the center of the end cover body. A stepped platform area is formed on the inner wall of the liquid inlet pipe, and a filter screen is installed on this stepped platform area. A connecting flange is threadedly connected to the outside of the liquid inlet pipe. A pressing cylinder is provided on the inner ring of the connecting flange, and when the connecting flange is tightened, the pressing cylinder presses against the filter screen. A fixing platform is also connected to the outer wall of the liquid inlet pipe, and a screw is threadedly connected to the inside of the fixing platform. When the screw is tightened, it presses against the outer cylinder of the connecting flange along the radial direction.

[0008] In a further embodiment, the inner diameter of the outer port of the liquid inlet pipe is larger than the inner diameter of the inner port. The outer diameter of one end of the pressing cylinder close to the filter screen is smaller than the outer diameter of the other end, and the inner ring of the liquid inlet pipe and the outer ring of the pressing cylinder are tightly fitted with each other.

[0009] In a further embodiment, an O-ring is embedded on the inner wall of the liquid inlet pipe, and the outer ring of the pressing cylinder is closely attached to the O-ring.

[0010] In a further embodiment, a sealing gasket is connected to one end of the pressing cylinder close to the filter screen, and the sealing gasket is closely attached to the filter screen.

[0011] In a further embodiment, a locking groove is provided on the outer cylindrical wall of the pressing cylinder, and when the screw is tightened, it is inserted into the locking groove.

[0012] In a further embodiment, a plurality of positioning holes are provided on the outer edge of the filter net, and a positioning protrusion is provided on the stepped area of the liquid inlet pipe corresponding to each positioning hole.

[0013] In a further embodiment, the positioning holes adopt a flared structure, and the positioning protrusions adopt a conical structure matching the positioning holes.

[0014] A pump body includes the front end cover of the pump body as described above, and further includes a pump body main body. Fixed ears corresponding to the lug ears of the front end cover of the pump body are provided on the pump body main body, and the lug ears and the fixed ears are tightly connected by bolts and nuts.

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

[0016] By installing a filter net in the liquid inlet pipe of the front end cover of the pump body, the present utility model facilitates the full filtration of the inhaled fluid, thereby avoiding impurities from invading the inside of the pump body and damaging the impeller. Moreover, the filter net is clamped between the liquid inlet pipe and the connecting flange. When the connecting flange is loosened, the filter net can be taken out for cleaning and impurity removal, and the disassembly, assembly, and replacement are all very convenient. The provided fixed platform and screw can effectively prevent the connecting flange from deflecting and loosening during use, ensuring the tightness of the connection between the connecting flange and the liquid inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the outer structure of the present utility model;

[0018] Figure 2 It is a schematic diagram of the inner structure of the present utility model;

[0019] Figure 3 It is a schematic diagram of the internal structure of the liquid inlet pipe of the present utility model;

[0020] Figure 4 It is a schematic diagram of the side view cross-sectional structure of the present utility model;

[0021] Figure 5 It is a schematic diagram of the side view partial cross-sectional structure when the liquid inlet pipe of the present utility model is connected to the connecting flange;

[0022] Figure 6 It is a schematic diagram of the installation structure of the end cover body and the pump body main body of the present utility model.

[0023] In the figure: 1. End cover body; 2. Connecting edge; 3. Lug; 4. Liquid outlet pipe; 5. Liquid inlet pipe; 51. O-ring; 52. Positioning projection; 6. Filter screen; 61. Positioning hole; 7. Connecting flange; 71. Pressing cylinder; 72. Gasket; 73. Locking groove; 8. Fixed platform; 9. Screw; 10. Pump body; 11. Fixed ear. Detailed implementation manners

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figure 1-4, a front end cover of a pump body, including an end cover body 1. A connecting edge 2 is provided at the outer edge of the end cover body 1, and a number of lugs 3 are equidistantly distributed at the outer edge of the connecting edge 2. A liquid outlet pipe 4 is connected to the outside of the end cover body 1 along the tangential direction, and an inlet pipe 5 is connected to the center of the end cover body 1. A stepped area is formed on the inner wall of the inlet pipe 5, and a filter screen 6 is installed on this stepped area to fully filter the inhaled fluid, thereby preventing impurities from invading the inside of the pump body and damaging the impeller. A connecting flange 7 is screwed on the outside of the inlet pipe 5. The outer cylinder of the connecting flange 7 is screwed on the periphery of the inlet pipe 5. A pressing cylinder 71 is provided in the inner ring of the connecting flange 7. When the connecting flange 7 is tightened, the pressing cylinder 71 presses against the filter screen 6, thereby tightly installing the filter screen 6. A cavity area is formed between the pressing cylinder 71 and the outer cylinder of the connecting flange 7 to facilitate the insertion of the inlet pipe 5. A fixing platform 8 is also connected to the outer wall of the inlet pipe 5. The fixing platform 8 adopts an L-shaped structure, and a screw 9 is screwed on the upper part of the fixing platform 8. The screw 9 penetrates through the fixing platform 8 up and down, and when the screw 9 is tightened, it presses against the outer cylinder of the connecting flange 7 along the radial direction to prevent the connecting flange 7 from deflecting and loosening during use.

[0028] Please refer to Figure 5 , the inner diameter of the outer port of the inlet pipe 5 is larger than the inner diameter of the inner port, making its inner ring in a flared structure. The outer diameter of one end of the pressing cylinder 71 close to the filter screen 6 is smaller than the outer diameter of the other end, and the inner ring of the inlet pipe 5 and the outer ring of the pressing cylinder 71 are tightly fitted with each other, so that when the connecting flange 7 is screwed, the pressing cylinder 71 and the inlet pipe 5 can be sleeved and tightly fitted.

[0029] Furthermore, an O-ring 51 is embedded on the inner wall of the inlet pipe 5, and the outer ring of the pressing cylinder 71 is tightly attached to the O-ring 51, thereby improving the sealing effect when the inlet pipe 5 and the connecting flange 7 are installed. And a sealing gasket 72 is connected to one end of the pressing cylinder 71 close to the filter screen 6, and the sealing gasket 72 is tightly attached to the filter screen 6 to further enhance the sealing performance.

[0030] Please refer to Figure 5 , a locking groove 73 is opened on the outer cylinder wall of the pressing cylinder 71, and when the screw 9 is tightened, it is inserted into the locking groove 73, effectively reducing the problem of slipping between the outer wall of the pressing cylinder 71 and the screw 9, thereby improving the firmness of the screw 9 in limiting the pressing cylinder 71.

[0031] Please refer to Figure 5 , in order to improve the installation stability of the filter screen 6, a number of positioning holes 61 are provided at the outer edge of the filter screen 6, and a positioning protrusion 52 is provided on the stepped area of the inlet pipe 5 corresponding to each positioning hole 61. When the filter screen 6 is tightly attached to the stepped area, the positioning protrusion 52 can pass through the positioning hole 61, thereby limiting the filter screen 6. In order to facilitate the quick docking of the positioning protrusion 52 and the positioning hole 61, the positioning hole 61 is set to adopt a flared structure, and the positioning protrusion 52 adopts a conical structure matching the positioning hole 61.

[0032] Please refer to Figure 6 , a pump body, including a front end cover of the pump body, and further including a pump body main body 10. A plurality of fixing lugs 11 are provided at the front end of the pump body main body 10, and the fixing lugs 11 correspond to the lugs 3 of the front end cover of the pump body one by one. After the lugs 3 and the fixing lugs 11 are buckled together, they are locked and connected by bolts and nuts.

[0033] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0034] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A front end cover of a pump body, comprising an end cover body (1), characterized in that: The outer edge of the end cover body (1) is provided with a connecting edge (2), and a number of lugs (3) are equidistantly distributed on the outer edge of the connecting edge (2). A liquid outlet pipe (4) is connected to the outside of the end cover body (1) in the tangential direction, and a liquid inlet pipe (5) is connected to the center of the end cover body (1). A stepped platform area is formed on the inner wall of the liquid inlet pipe (5), and a filter screen (6) is installed on this stepped platform area. The outer side of the liquid inlet pipe (5) is threadedly connected with a connecting flange (7). An inner ring of the connecting flange (7) is provided with a pressing cylinder (71). When the connecting flange (7) is tightened, the pressing cylinder (71) presses against the filter screen (6). A fixing platform (8) is also connected to the outer wall of the liquid inlet pipe (5), and a screw (9) is threadedly connected inside the fixing platform (8). When the screw (9) is tightened, it presses against the outer cylinder of the connecting flange (7) in the radial direction.

2. The front end cover of a pump body according to claim 1, characterized in that: The inner diameter of the outer port of the liquid inlet pipe (5) is larger than the inner diameter of the inner port. The outer diameter of one end of the pressing cylinder (71) close to the filter screen (6) is smaller than the outer diameter of the other end, and the inner circle of the liquid inlet pipe (5) and the outer circle of the pressing cylinder (71) are tightly matched.

3. A front end cover of a pump body according to claim 1, characterized in that: An O-ring (51) is embedded on the inner wall of the liquid inlet pipe (5), and the outer circle of the pressing cylinder (71) is closely attached to the O-ring (51).

4. A front end cover of a pump body according to claim 1, characterized in that: One end of the pressing cylinder (71) close to the filter screen (6) is connected with a sealing gasket (72), and the sealing gasket (72) is closely attached to the filter screen (6).

5. A front end cover of a pump body according to claim 1, characterized in that: Locking grooves (73) are formed on the outer cylinder wall of the pressing cylinder (71), and when the screw (9) is tightened, it is inserted into the locking grooves (73).

6. A front end cover of a pump body according to claim 1, characterized in that: A number of positioning holes (61) are formed on the outer edge of the filter screen (6), and a positioning protrusion (52) is provided on the stepped platform area of the liquid inlet pipe (5) corresponding to each positioning hole (61).

7. A front end cover of a pump body according to claim 6, characterized in that: The positioning holes (61) adopt a flared structure, and the positioning protrusions (52) adopt a conical structure matching the positioning holes (61).

8. A pump body, comprising a front end cover of the pump body according to any one of claims 1-7, characterized in that: It further includes a pump body (10). The pump body (10) is provided with fixing ears (11) corresponding one by one to the lugs (3) on the front end cover of the pump body. The lugs (3) and the fixing ears (11) are locked and connected by bolts and nuts.

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