Diffuser for partial flow pump

Abstract

The diffuser for the partial flow pump comprises a diffuser body and an annular flow channel arranged in the diffuser body, the diffuser body is provided with a throat straight pipe and a diffusion installation opening which are connected with each other, and a diffusion pipe is detachably installed in the diffusion installation opening; the diffusion pipe is arranged in the diffusion installation opening, the pipe section of the diffusion pipe in the outward direction of the axis is monotonically increased, the central axis of the throat straight pipe and the central axis of the diffusion pipe coincide with the tangent line of the outer circle of the annular flow channel, the diffusion pipe is installed in the diffusion installation opening to be connected with the throat straight pipe, the diffusion pipe is detachably installed and fixed, and therefore the diffusion effect is improved. When the partial flow pump conveys granular media and the diffusion pipe is abraded due to high-speed flowing of the media, only the diffusion pipe needs to be replaced, so that the maintenance cost is reduced, the diffusion pipe can be replaced in the diffusion mounting opening due to the replaceable mode of the diffusion pipe, and the maintenance efficiency is improved. Therefore, the flow regulation of the diffuser can be realized.

Description

Technical Field

[0001] This application relates to the technical field of water pump components, and in particular to a diffuser for a partial flow pump. Background Technology

[0002] Partial flow pumps, also known as high-speed partial flow pumps or Saint-Gobain pumps, are high-head, low-flow-rate high-speed centrifugal pumps. The diffuser is a crucial component of a partial flow pump. The diffuser tube is located on the diffuser. After the fluid passes through the impeller, it first undergoes initial deceleration within the annular flow channel of the diffuser, and then enters the diffuser tube for further deceleration. During this deceleration process, the fluid's kinetic energy is continuously converted into pressure energy, thus increasing the static pressure.

[0003] Currently, Chinese patent application number 2016101941926 discloses a diffuser structure, including a diffuser tube and a throat straight tube connected to each other. The central axis of the diffuser tube and the throat straight tube coincides with the outer circle tangent of the volute annular flow channel. The cross-section of the diffuser tube increases monotonically in the outward direction along the axis. The shape of the diffuser tube is trumpet-shaped.

[0004] Regarding the aforementioned technologies, the inventors discovered that some flow pumps are used for transporting media containing particles. Due to the high-speed flow of the media, the diffuser tubes experience increased wear, resulting in significant wear and reduced roughness, which in turn reduces the overall efficiency of the flow pump. If the diffuser tubes are directly polished, the change in the diameter of the diffuser tubes affects the performance of the flow pumps, and the maintenance costs are also high. Therefore, there are certain areas for improvement. Utility Model Content

[0005] To reduce maintenance costs, this application provides a diffuser for a partial flow pump.

[0006] The diffuser for a partial flow pump provided in this application adopts the following technical solution:

[0007] A diffuser for a partial flow pump includes a diffuser body and an annular flow channel disposed in the diffuser body. The diffuser body is provided with a throat straight pipe and a diffuser mounting port that are connected to each other. A diffuser tube is detachably installed in the diffuser mounting port. The cross-section of the diffuser tube increases monotonically in the outward direction along its axis. The central axis of the throat straight pipe and the diffuser tube coincides with the outer tangent of the annular flow channel.

[0008] Preferably, the diffuser includes a straight pipe section and a diffuser section connected to each other. The straight pipe section is connected to the throat straight pipe. The central axis of the straight pipe section, the throat straight pipe and the diffuser section coincides with the outer tangent of the annular flow channel. The cross-section of the diffuser section increases monotonically in the outward direction along the axis from the straight pipe section.

[0009] Preferably, the diffusion pipe is integrally formed with a tapered dovetail block arranged in the axial direction of the diffusion pipe, the diffusion pipe body is provided with a tapered dovetail groove, the tapered dovetail groove is in communication with the diffusion mounting port, the tapered dovetail groove is matched with the tapered dovetail block, and the tapered dovetail block is provided with a fixing member for fixing the tapered dovetail groove.

[0010] Preferably, the fixing member comprises a fixing groove arranged on the bottom surface of the tapered dovetail block, and a movable locking block arranged in the fixing groove, and the tapered dovetail block is provided with a fixing portion for driving the movable locking block to move and abut against the tapered dovetail groove.

[0011] Preferably, the fixing portion comprises a tapered threaded hole arranged on the tapered dovetail block, the tapered threaded hole is in communication with the fixing groove, a tapered screw is threadedly connected in the tapered threaded hole, the outer wall of the tapered screw is provided with tapered threads, the movable locking block is provided with a locking block fixing table, and the locking block fixing table is provided with a threaded matching surface matched with the tapered threads of the tapered screw.

[0012] Preferably, the end of the tapered screw is provided with a screw hexagonal head.

[0013] Preferably, the surface of the screw hexagonal head is provided with a one-way groove.

[0014] Preferably, the contact surface of the movable locking block and the tapered dovetail groove is provided with an elastic damping pad.

[0015] Preferably, the movable locking block is provided with an elastic connecting column, and the two ends of the elastic connecting column are fixed on the fixing groove and the movable locking block, respectively.

[0016] Preferably, the diffusion pipe body is provided with a countersunk hole around the opening position of the diffusion mounting port.

[0017] In summary, the present application has at least one of the following beneficial technical effects:

[0018] 1. By installing the diffusion pipe in the diffusion mounting port and connecting with the throat straight pipe, the diffusion pipe is detachably installed and fixed, so that when the part of the flow pump transports the granular medium, the diffusion pipe can be replaced after being worn by the high-speed flow of the medium, thereby reducing the maintenance cost.

[0019] 2. The diffusion pipe in the present application can be replaced, so that different pipe diameters of the diffusion pipe can be replaced in the diffusion mounting port, and the flow regulation of the diffuser can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of a diffuser.

[0021] Figure 2 is a cross-sectional view of the diffuser body.

[0022] Figure 3 is a cross-sectional view of the diffuser pipe.

[0023] Figure 4 is a schematic view of the diffuser mounting port without the diffuser pipe installed.

[0024] Figure 5 is a schematic view of the diffuser mounting port with the diffuser pipe installed.

[0025] Figure 6 is a schematic view of the diffuser pipe structure.

[0026] Figure 7 is a schematic view of the fixing part structure.

[0027] BRIEF DESCRIPTION OF DRAWINGS 1. Diffuser body; 2. Water inlet; 3. Annular flow passage; 4. Throat straight pipe; 5. Diffuser mounting port; 6. Diffuser pipe; 61. Straight pipe section; 62. Diffusion section; 7. Counterbore; 8. Conical dovetail block; 9. Conical dovetail groove; 10. Fixed groove; 11. Movable locking block; 12. Fixing part; 121. Conical threaded hole; 122. Tapered screw; 123. Screw hexagonal head; 124. Slit; 125. Locking block fixing table; 126. Threaded mating surface; 13. Elastic damping pad; 14. Elastic connecting column. DETAILED DESCRIPTION

[0028] The following will be described in detail with reference to the accompanying drawings. Figures 1-7 The present application will be described in further detail.

[0029] A diffuser for a partial flow pump, as shown in Figure 1 , comprises a diffuser body 1 for mounting an impeller, a water inlet 2 in the middle of the diffuser body 1, an annular flow passage 3 provided in the diffuser body 1, and the side of the impeller used to be opposite to the annular flow passage 3.

[0030] As shown in Figure 1 and Figure 2 , the diffuser body 1 is provided with a throat straight pipe 4 and a diffuser mounting port 5 connected to each other, and the diffuser mounting port 5 is detachably installed with a diffuser pipe 6, the outer wall of the diffuser pipe 6 tightly abutting the inner wall of the diffuser mounting port 5, the pipe cross-section of the diffuser pipe 6 along the axis in the outward direction is monotonously increasing, and the central axes of the throat straight pipe 4 and the diffuser pipe 6 coincide with the tangent of the outer circle of the annular flow passage 3.

[0031] Therefore, after the fluid is worked by the impeller, it first slows down in the annular flow passage 3 of the diffuser, and then further slows down in the diffuser pipe 6, and the kinetic energy of the fluid is continuously converted into pressure energy during the process of slowing down, so that the static pressure is increased and the fluid is discharged from the diffuser pipe 6.

[0032] In this embodiment, referring to Figure 2 and Figure 3 It is shown that the diffusion pipe 6 includes a straight pipe section 61 and a diffusion section 62 connected with each other, the straight pipe section 61 is connected with the throat straight pipe 4, the central axes of the straight pipe section 61, the throat straight pipe 4 and the diffusion section 62 coincide with the tangent of the outer circle of the annular flow channel 3, and the pipe section of the diffusion section 62 from the straight pipe section 61 along the axial direction outward is monotonously increased.

[0033] Among them, the diffuser body 1 is provided with a countersunk hole 7 around the opening position of the diffusion mounting port 5, the countersunk hole 7 is a reserved area for the installation of the diffusion pipe 6, which can ensure that the diffusion pipe 6 does not interfere with the cooperation of the diffuser body 1 and the pump body after installation.

[0034] The detachable connection structure of the diffusion pipe 6 is described in detail below.

[0035] Referring to Figure 4 and Figure 5 It is shown that the diffusion pipe 6 is integrally formed with a tapered dovetail block 8, the tapered dovetail block 8 is arranged along the axial direction of the diffusion pipe 6, the diffuser body 1 is provided with a tapered dovetail groove 9, the tapered dovetail groove 9 is communicated with the diffusion mounting port 5, the tapered dovetail groove 9 is matched with the tapered dovetail block 8, and the fixing member is arranged on the tapered dovetail block 8 and used for fixing the tapered dovetail groove 9.

[0036] In one embodiment, referring to Figure 5 and Figure 6 It is shown that the fixing member includes a fixing groove 10 arranged on the bottom surface of the tapered dovetail block 8 and a movable lock block 11 located in the fixing groove 10, the fixing groove 10 transversely penetrates through both sides of the tapered dovetail block 8, and the movable lock block 11 is arranged in the shape of a rectangle, wherein the fixing part 12 is arranged on the tapered dovetail block 8 and used for moving the movable lock block 11 and abutting against the tapered dovetail groove 9, the pressure is applied on the movable lock block 11 through the fixing part 12, the movable lock block 11 moves downward, the bottom surface of the movable lock block 11 abuts against the tapered dovetail groove 9, and the friction force between the movable lock block 11 and the tapered dovetail groove 9 is generated, so that the tapered dovetail block 8 is fixed in the tapered dovetail groove 9.

[0037] In one embodiment, referring to Figure 6 and Figure 7 It is shown that the fixing part 12 includes a tapered threaded hole 121 arranged on the tapered dovetail block 8, the tapered threaded hole 121 is communicated with the fixing groove 10, only the lower part of the tapered threaded hole 121 is communicated with the fixing groove 10, and the tapered threaded hole 121 is arranged along the axial direction of the tapered dovetail block 8.

[0038] A tapered screw 122 is screwed into the tapered threaded hole 121, the outer wall of the tapered screw 122 is tapered, that is, the outer wall of the tapered screw 122 has a certain inclination along the axial direction, the outer wall of the tapered screw 122 is distributed with tapered threads, and the inner wall of the tapered threaded hole 121 is provided with internal threads matched with the tapered threads. The outer wall of the tapered screw 122 is partially arranged in the fixed groove 10.

[0039] The end of the tapered screw 122 is provided with a screw hexagonal head 123, and the surface of the screw hexagonal head 123 is provided with a slot 124. The screw hexagonal head 123 and the slot 124 improve the convenience of rotating the tapered screw 122.

[0040] The movable lock block 11 is provided with a lock block fixing table 125, which is arranged on the upper surface of the movable lock block 11 and located at the middle position. The lock block fixing table 125 is provided with a threaded matching surface 126 matched with the tapered threads of the tapered screw 122. Thus, with the rotation of the tapered screw 122, the tapered screw 122 advances into the tapered threaded hole 121, and the outer wall surface of the tapered screw 122 matches with the threaded matching surface 126. Since the outer wall of the tapered screw 122 is tapered, the tapered screw 122 will drive the movable lock block 11 to move downward to abut against the tapered dovetail groove 9.

[0041] Referring to Figure 7 As shown, the contact surface of the movable lock block 11 and the tapered dovetail groove 9 is provided with an elastic damping pad 13. When the movable lock block 11 moves downward, the elastic damping pad 13 will replace the contact between the movable lock block 11 and the tapered dovetail groove 9, and the elastic damping pad 13 can be continuously compressed, thereby improving the contact pressure between the movable lock block 11 and the tapered dovetail groove 9, and further improving the friction between the movable lock block 11 and the tapered dovetail groove 9.

[0042] Referring to Figure 7 As shown, the movable lock block 11 is provided with an elastic connecting column 14, the two ends of the elastic connecting column 14 are fixed on the fixed groove 10 and the movable lock block 11 respectively, and the elastic connecting column 14 can limit the movable lock block 11 in the fixed groove 10. The movable lock block 11 has a certain freedom of movement in the up-down direction of the fixed groove 10, and the movable lock block 11 will not fall out of the fixed groove 10 when the tapered dovetail block 8 and the tapered dovetail groove 9 are disassembled.

[0043] The application installs the diffusion pipe 6 in the diffusion mounting port 5 to connect with the throat straight pipe 4, and the diffusion pipe 6 is detachably fixed. Therefore, when the partial flow pump transports the medium with particles, the diffusion pipe 6 can be replaced after being worn by the high-speed flow of the medium, thereby reducing the maintenance cost.

[0044] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A diffuser for a partial flow pump, comprising a diffuser body (1) and an annular flow channel (3) arranged in the diffuser body (1), characterized in that The diffuser body (1) is provided with a throat straight pipe (4) and a diffusion mounting port (5) connected with each other, and a diffusion pipe (6) is detachably mounted in the diffusion mounting port (5), wherein the pipe cross section of the diffusion pipe (6) along the axial outward direction is monotonously increased, and the central axes of the throat straight pipe (4) and the diffusion pipe (6) are coincident with the tangent line of the outer circle of the annular flow channel (3).

2. A diffuser for a partial flow pump according to claim 1, wherein The diffusion pipe (6) comprises a straight pipe section (61) and a diffusion section (62) connected with each other, the straight pipe section (61) is connected with the throat straight pipe (4), the central axes of the straight pipe section (61), the throat straight pipe (4) and the diffusion section (62) are coincident with the tangent line of the outer circle of the annular flow channel (3), and the pipe cross section of the diffusion section (62) along the axial outward direction is monotonously increased from the straight pipe section (61).

3. A diffuser for a partial flow pump according to claim 1, wherein The diffusion pipe (6) is integrally formed with a tapered dovetail block (8) arranged along the axial direction of the diffusion pipe (6), a tapered dovetail groove (9) is formed in the diffuser body (1) and communicates with the diffusion mounting port (5), the tapered dovetail groove (9) is matched with the tapered dovetail block (8), and a fixing member is arranged on the tapered dovetail block (8) and used for fixing the tapered dovetail groove (9).

4. A diffuser for a partial flow pump according to claim 3, wherein The fixing member comprises a fixing groove (10) arranged on the bottom surface of the tapered dovetail block (8) and a movable lock block (11) arranged in the fixing groove (10), and a fixing part (12) is arranged on the tapered dovetail block (8) and used for moving the movable lock block (11) and abutting against the tapered dovetail groove (9).

5. A diffuser for a partial flow pump according to claim 4, wherein The fixing part (12) comprises a tapered threaded hole (121) arranged on the tapered dovetail block (8) and communicating with the fixing groove (10), a tapered screw (122) is threadedly connected in the tapered threaded hole (121), tapered threads are distributed on the outer wall of the tapered screw (122), a lock block fixing table (125) is arranged on the movable lock block (11), and a threaded matching surface (126) matched with the tapered threads of the tapered screw (122) is arranged on the lock block fixing table (125).

6. A diffuser for a partial flow pump according to claim 5, wherein The end of the tapered screw (122) is provided with a screw hexagonal head (123).

7. A diffuser for a partial flow pump according to claim 6, wherein A one-way groove (124) is arranged on the surface of the screw hexagonal head (123).

8. A diffuser for a partial flow pump according to claim 4, wherein An elastic damping pad (13) is arranged on the contact surface of the movable lock block (11) and the tapered dovetail groove (9).

9. A diffuser for a partial flow pump according to claim 4, wherein An elastic connecting column (14) is arranged on the movable lock block (11), and the two ends of the elastic connecting column (14) are fixed on the fixing groove (10) and the movable lock block (11) respectively.

10. A diffuser for a partial flow pump according to claim 4, wherein A countersunk hole (7) is formed in the diffuser body (1) around the opening position of the diffusion mounting port (5).

Images