Bellows expansion joint for inlet and outlet of pump

Abstract

The utility model discloses a corrugated expansion joint for an inlet and an outlet of a pump, which relates to the technical field of corrugated expansion joints and comprises a corrugated pipe, an outlet connecting pipe, an inlet connecting pipe, an inner pipe and a stabilizing component, the outlet connecting pipe and the inlet connecting pipe are fixedly communicated with two pipe ends of the corrugated pipe respectively, the inner pipe is positioned on the inner side of the corrugated pipe, and the stabilizing component is simultaneously connected outside the outlet connecting pipe and the inlet connecting pipe. One pipe end of the inner pipe is fixed with the inlet pipe; the positioning assembly is arranged between the corrugated pipe and the inlet connecting pipe to assist the pipes in axial alignment, and the cushion supporting assembly is arranged between the inner side of the outlet connecting pipe and the periphery of the inner pipe to provide flexible supporting. The utility model has the advantages that the inner pipe is connected in advance through the inlet connecting pipe and then combined and fixedly mounted into a whole, so that the position of the inner pipe can be conveniently arranged; the arranged positioning assembly can improve the connection precision of the inner pipe; and the arranged cushion supporting assembly can enhance the stability strength when the inner pipe is arranged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of corrugated expansion joint more specifically relates to a kind of corrugated expansion joint for pump inlet and outlet. BACKGROUND

[0002] The main purpose of using corrugated expansion joint (also known as corrugated pipe compensator or flexible joint) for pump inlet and outlet is to absorb the displacement of the pipeline system caused by temperature change, mechanical vibration and other reasons, so as to protect the pump and its connected pipeline from damage.

[0003] Corrugated expansion joint has good flexibility and elasticity, which can effectively relieve stress caused by thermal expansion and contraction, reduce noise and vibration transmission, and improve the stability and safety of the whole system.

[0004] The existing corrugated expansion joint, as shown in the application number: CN201922412997.2, has a photoelectric telescopic detection device, which needs to be correspondingly provided with a flow guide pipe at the position of the corrugated pipe. However, the flow guide pipe needs to be internally arranged and needs to be centrally circulated, which has the disadvantage of inconvenient connection operation during installation. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the above technical problems, and provides a corrugated expansion joint for pump inlet and outlet.

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

[0007] The utility model provides a corrugated expansion joint for pump inlet and outlet, which comprises a corrugated pipe, an outlet connection pipe and an inlet connection pipe respectively connected and fixed at both pipe ends of the corrugated pipe, an inner pipe inside the corrugated pipe, and a stabilizing assembly connected to the outlet connection pipe and the inlet connection pipe, and has a gap between the corrugated pipe and the inner pipe. One pipe end of the inner pipe is fixed with the inlet connection pipe.

[0008] It also includes a positioning assembly arranged between the corrugated pipe and the inlet connection pipe to assist the axial alignment of the pipe, and a spacer assembly arranged between the inner side of the outlet connection pipe and the periphery of the inner pipe to provide flexible support.

[0009] As a preferred technical solution of the utility model, the positioning assembly comprises a ring groove arranged on the inlet connection pipe and a protruding ring fixed on the inner pipe, and the protruding ring is externally attached to the ring groove.

[0010] As a preferred technical solution of the utility model, the spacer assembly comprises a ring groove arranged on the periphery of the inner pipe and a soft ring attached to the ring groove, and the soft ring is externally attached to the inner side of the outlet connection pipe.

[0011] As a preferred technical solution of the utility model, the inner side of the outlet connection pipe is smooth.

[0012] As a preferred technical scheme of the utility model, the stabilizing assembly is provided with multiple groups.

[0013] As a preferred technical scheme of the utility model, the stabilizing assembly comprises a first fixed plate fixed outside the outlet connecting pipe, a second fixed plate fixed outside the inlet connecting pipe, a bolt penetrating through the first fixed plate and the second fixed plate, and a nut threadedly connected with the bolt to press the first fixed plate and the second fixed plate.

[0014] The utility model has the advantages as follows:

[0015] The inner pipe is pre-connected through the inlet connecting pipe, and then combined and fixed integrally, so that the position of the inner pipe can be conveniently arranged; the positioning assembly can improve the precision during connection of the inner pipe; and the supporting assembly can enhance the stability during arrangement of the inner pipe. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the utility model;

[0017] Figure 2 is Figure 1 a split structural schematic view.

[0018] Reference signs: corrugated pipe 1, outlet connecting pipe 2, inlet connecting pipe 3, inner pipe 4, positioning assembly 5, supporting assembly 6, stabilizing assembly 7, ring groove 51, convex ring 52, ring groove 61, soft ring 62, first fixed plate 71, second fixed plate 72, bolt 73, nut 74. DETAILED DESCRIPTION

[0019] As Figures 1-2 shown in the utility model, a corrugated expansion joint for pump inlet and outlet is provided, which comprises a corrugated pipe 1, an outlet connecting pipe 2 and an inlet connecting pipe 3 fixedly communicated at both pipe ends of the corrugated pipe 1, and an inner pipe 4 inside the corrugated pipe 1, one pipe end of the inner pipe 4 being fixed with the inlet connecting pipe 3; the outlet end of the pump is connected by the inlet connecting pipe 3 to provide fluid into the inlet connecting pipe 3, and the fluid can be blocked by the inner pipe 4 to impact the corrugated pipe 1, and the fluid is discharged at the outlet connecting pipe 2;

[0020] The corrugated pipe 1 and the inner pipe 4 have a gap therebetween to provide a space for deformation of the corrugated pipe 1 when impacted;

[0021] The stabilizing assembly 7 is provided outside the outlet connecting pipe 2 and the inlet connecting pipe 3, and the stabilizing assembly 7 is provided to integrally connect and fix the outlet connecting pipe 2 and the inlet connecting pipe 3 to stabilize the relative positions of the two pipes;

[0022] The stabilizing assembly 7 is provided with multiple groups, as shown in the figure, two groups of stabilizing assemblies 7 are arranged above and below to provide balanced support to increase the stability of the overall structure;

[0023] The specific structure of the stabilizing assembly 7 is as follows:

[0024] The stabilizing assembly 7 comprises a first fixed plate 71 fixed outside the outlet pipe 2, a second fixed plate 72 fixed outside the inlet pipe 3, a bolt 73 penetrating through the first fixed plate 71 and the second fixed plate 72, and a nut 74 threadedly connected with the bolt 73 to press the first fixed plate 71 and the second fixed plate 72, the first fixed plate 71 and the second fixed plate 72 are provided with holes in advance, the holes are used for the bolt 73 to penetrate through, after the bolt 73 penetrates through the holes of the first fixed plate 71 and the second fixed plate 72, the penetrating part of the bolt 73 is used for the nut 74 to threadedly connect, and the nut 74 is tightly attached at the second fixed plate 72;

[0025] Further comprising a positioning assembly 5 arranged between the corrugated pipe 1 and the inlet pipe 3 to assist the axial alignment of the pipes, so as to facilitate the operation during connection;

[0026] The specific structure of the positioning assembly 5 is as follows:

[0027] The positioning assembly 5 comprises a ring groove 51 arranged on the inlet pipe 3 and a convex ring 52 fixed on the inner pipe 4, the convex ring 52 is attached to the ring groove 51, the ring groove 51 is arranged on the right end of the inlet pipe 3, and the convex ring 52 is integrally fixed on the left end of the inner pipe 4, during connection, the convex ring 52 is placed into the ring groove 51 for stable positioning, and then welding or other methods are used for connection and fixation, so as to improve the connection precision;

[0028] Further comprising a spacer assembly 6 arranged between the inner side of the outlet pipe 2 and the outer periphery of the inner pipe 4 to provide flexible support, the spacer assembly 6 arranged can improve the support stability of the left side of the inner pipe 4;

[0029] The specific structure of the spacer assembly 6 is as follows:

[0030] The spacer assembly 6 comprises a ring groove 61 arranged on the outer periphery of the inner pipe 4 and a soft ring 62 attached to the ring groove 61, the soft ring 62 is attached to the inner side of the outlet pipe 2, the ring groove 61 is arranged on the outer periphery of the inner pipe 4, the soft ring 62 is sleeved into the ring groove 61 and fixed by using adhesive or other methods, when the inner pipe 4 is placed into the inner side of the outlet pipe 2, the soft ring 62 contacts the outlet pipe 2 to provide support and flexible attachment;

[0031] When the material of the soft ring 62 is rubber, the soft ring 62 can also provide sealing to block the fluid from entering the corrugated pipe 1, and protection can be provided;

[0032] The inner side of the outlet pipe 2 is smooth, which can reduce the resistance during the attachment of the soft ring 62 to the inner side of the outlet pipe 2, and improve the durability.

[0033] The corrugated expansion joint is made as follows: the outlet pipe 2 is welded at the right end of the corrugated pipe 1, the left end of the inlet pipe 3 is welded with the inner pipe 4 through the positioning assembly 5, the inner pipe 4 is placed at the left end of the corrugated pipe 1 until the supporting assembly 6 is at the inner side of the inner pipe 4 and the corrugated pipe 1 contacts the inlet pipe 3, then the corrugated pipe 1 and the inlet pipe 3 are welded and fixed, the stabilizing assembly 7 is connected and stabilized at the outlet pipe 2 and the inlet pipe 3, and the manufacturing is simple.

[0034] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, for those skilled in the art, obviously, the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims.

[0035] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A corrugated expansion joint for pump inlet and outlet, comprising a corrugated pipe (1), an outlet connecting pipe (2) and an inlet connecting pipe (3) fixedly connected to both pipe ends of the corrugated pipe (1) respectively, an inner pipe (4) inside the corrugated pipe (1), and a stabilizing assembly (7) connecting the outlet connecting pipe (2) and the inlet connecting pipe (3) outside, the corrugated pipe (1) and the inner pipe (4) having a gap therebetween, and one pipe end of the inner pipe (4) being fixed to the inlet connecting pipe (3). characterized in that Further comprising a positioning assembly (5) arranged between the corrugated pipe (1) and the inlet connecting pipe (3) to assist the axial alignment of the pipes, and a supporting assembly (6) arranged between the inner side of the outlet connecting pipe (2) and the outer periphery of the inner pipe (4) to provide flexible support.

2. A bellows expansion joint for pump inlets and outlets according to claim 1, characterized in that The positioning assembly (5) comprises a ring groove (51) arranged on the inlet connecting pipe (3) and a protruding ring (52) fixedly arranged on the inner pipe (4), the protruding ring (52) being externally fitted into the ring groove (51).

3. A bellows expansion joint for pump inlets and outlets according to claim 1, characterized in that The supporting assembly (6) comprises a ring groove (61) arranged on the outer periphery of the inner pipe (4) and a soft ring (62) externally fitted into the ring groove (61), the soft ring (62) being externally fitted into the inner side of the outlet connecting pipe (2).

4. A bellows expansion joint for pump inlets and outlets according to claim 3, characterized in that The inner side of the outlet connecting pipe (2) is smooth.

5. A bellows expansion joint for pump inlets and outlets according to claim 1, characterized in that The stabilizing assembly (7) is provided with multiple groups.

6. A bellows expansion joint for pump inlets and outlets according to claim 5, characterized in that The stabilizing assembly (7) comprises a first fixed plate (71) fixedly arranged outside the outlet connecting pipe (2), a second fixed plate (72) fixedly arranged outside the inlet connecting pipe (3), a bolt (73) penetrating through the first fixed plate (71) and the second fixed plate (72), and a nut (74) threadedly connected with the bolt (73) to press the first fixed plate (71) and the second fixed plate (72).

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