Fluid conveying pump

Abstract

The utility model belongs to the technical field of fluid conveying equipment, and particularly relates to a fluid conveying pump which comprises a pump wheel, one end of a fluid conveying pipeline is connected with the inlet end of the pump wheel, the outlet end of the pump wheel is connected with an outlet pipeline, the pump wheel is provided with a mechanical seal and a driving assembly for driving the pump wheel to rotate, and the outlet pipeline is connected with a balance pipeline. The end, away from the outlet pipeline, of the balance pipeline is connected with the end, away from the pump impeller, of the mechanical seal. The other end of the mechanical seal is connected with the balance pipeline, the balance pipeline is communicated with the outlet pipeline, the balance pipeline is provided with the balance tank, and the balance pipeline and the balance tank can balance the pressure at the two ends of the mechanical seal, so that the pressure at the two ends of the mechanical seal is equal, and the offset of the mechanical seal is greatly reduced; therefore, damage to the pump impeller is reduced as much as possible.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluid conveying equipment, in particular to a fluid conveying pump. Background Art

[0002] A fluid transfer pump is a machine that transports or pressurizes fluids. It transfers the mechanical energy of the prime mover or other external energy to the fluid, increasing the fluid's energy. It is primarily used to transport fluids such as water, oil, acid and alkali solutions, emulsions, suspensions, and liquid metals. Fluid transfer pumps are typically installed in pipelines where the fluid flows. The centrifugal force generated by the high-speed rotation of the pump impeller scatters the fluid, thereby pressurizing the fluid. A mechanical seal is typically installed on the impeller. Due to the high fluid pressure within the pump, the pressures on both ends of the mechanical seal are unequal, causing the seal to shift, which in turn causes the impeller to swing during operation, potentially damaging the transfer pump. Utility Model Content

[0003] In order to solve the problems in the above-mentioned background technology, the utility model provides a fluid conveying pump, which is connected to a balancing pipe at the other end of the mechanical seal, the balancing pipe is connected to the outlet pipe, and a balancing tank is installed on the balancing pipe. The balancing pipe and the balancing tank can balance the pressure at both ends of the mechanical seal, making the pressure at both ends of the mechanical seal equal, greatly reducing the offset of the mechanical seal, and thus minimizing damage to the pump impeller.

[0004] The utility model provides a fluid delivery pump, which is installed on a fluid delivery pipeline and comprises a pump impeller, one end of the fluid delivery pipeline is connected to the inlet end of the pump impeller, the outlet end of the pump impeller is connected to an outlet pipeline, the pump impeller is provided with a mechanical seal and a drive assembly for driving the pump impeller to rotate, a balancing pipeline is connected to the outlet pipeline, an end of the balancing pipeline away from the outlet pipeline is connected to an end of the mechanical seal away from the pump impeller, and a balancing tank is installed on the balancing pipeline.

[0005] Furthermore, the drive assembly includes a base, the pump wheel is mounted on the base, and a drive motor is also mounted on the base, and the output shaft of the drive motor is connected to the rotating shaft of the pump wheel through a coupling.

[0006] Furthermore, a protective cover is provided on the base, and the protective cover is sleeved on the coupling.

[0007] Furthermore, soft connections are provided between the fluid delivery pipeline and the inlet end of the pump wheel, and between the outlet pipeline and the outlet end of the pump wheel.

[0008] Furthermore, an angle sensor for detecting the swing angle of the pump wheel is installed on the pump wheel, and an audible and visual alarm is installed on the base. The angle sensor and the audible and visual alarm are electrically connected together through a wire.

[0009] Furthermore, a filter box is installed on the outlet pipe, and a filter screen is provided in the filter box.

[0010] Furthermore, a door is hinged on one of the box walls of the filter box, and a locking assembly for fixing the door is provided on the outer wall of the filter box.

[0011] Furthermore, the locking assembly includes two fixed plates, which are fixed on the outer wall of the filter box. A locking rod is slidably inserted between the two fixed plates. A fixed block is fixed on the box door. One end of the locking rod is inserted into the fixed block. A pull ring is fixed on the end of the locking rod away from the fixed block. A support plate is fixed on the locking rod. The support plate is located between the two fixed plates. A spring is provided between the support plate and the fixed plate close to the pull ring. The spring pushes the support plate to move toward the fixed block.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] (1) The pressure on the left end of the mechanical seal is the fluid pressure in the outlet pipe. The right end of the mechanical seal is connected to the outlet pipe through a balancing pipe. Therefore, the pressure on the right end of the mechanical seal is also the fluid pressure in the outlet pipe. Therefore, the pressure at both ends of the mechanical seal can be balanced through the balancing pipe and the balancing tank, making the pressure at both ends of the mechanical seal equal, greatly reducing the offset of the mechanical seal, and thus minimizing the damage to the pump impeller.

[0014] (2) When the angle sensor detects that the swing angle of the pump wheel exceeds the specified range, the sound and light alarm will sound an alarm and continuously flash the light to remind the staff that the pump wheel has a fault.

[0015] (3) When the pump wheel is damaged by a large fluid pressure, the filter can promptly block the damaged fragments of the pump wheel, preventing the fragments from following the fluid into the next device, and the filter can also filter out impurities in the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of a fluid delivery pump according to Example 1;

[0018] Figure 2 This is a schematic diagram of the overall structure of a fluid delivery pump according to Example 2;

[0019] Figure 3 is a cross-sectional view of the filter box in Example 2;

[0020] Figure 4 Schematic diagram of the structure of the locking assembly in Example 2;

[0021] Explanation of the accompanying symbols: 1. Fluid delivery pipeline; 2. Pump impeller; 3. Outlet pipeline; 4. Flexible connection; 5. Mechanical seal; 6. Drive assembly; 60. Base; 61. Drive motor; 62. Coupling; 63. Protective cover; 7. Balance pipeline; 70. Balance tank; 8. Angle sensor; 9. Sound and light alarm; 10. Filter box; 11. Filter screen; 12. Box door; 13. Locking assembly; 130. Fixed plate; 131. Locking rod; 132. Fixed block; 133. Pull ring; 134. Support plate; 135. Spring. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The following is combined with Figure 1 To the attached Figure 4 And specific embodiments discuss the present invention in detail.

[0024] Example 1

[0025] Reference Figure 1 , a fluid delivery pump provided in this embodiment is installed on a fluid delivery pipe 1, in which fluid flows. A fluid delivery pump includes a pump impeller 2, one end of the fluid delivery pipe 1 is connected to the inlet end of the pump impeller 2, and the outlet end of the pump impeller 2 is connected to the outlet pipe 3. A soft connection 4 is installed between the fluid delivery pipe 1 and the inlet end of the pump impeller 2 and between the outlet pipe 3 and the outlet end of the pump impeller 2. The soft connection 4 has good elasticity and buffering performance, which can not only effectively reduce the vibration and noise caused by the fluid flow, but also compensate for displacement. Inaccurate pipeline installation will cause a certain displacement of the pipeline, and the soft connection 4 can freely expand and contract within a certain range, thereby compensating for the displacement of the pipeline.

[0026] A mechanical seal 5 is installed on the side of the impeller 2 away from the inlet end of the impeller 2. A drive assembly 6 for driving the impeller 2 to rotate is also connected to the impeller 2. The drive assembly 6 includes a base 60. The impeller 2 is also installed on the base 60. A drive motor 61 is also installed on the base 60. The output shaft of the drive motor 61 is connected to the rotating shaft of the impeller 2 through a coupling 62. Therefore, the drive motor 61 drives the impeller 2 to rotate at high speed through the coupling 62. A protective cover 63 is also installed on the base 60. The protective cover 63 is sleeved on the coupling 62, thereby providing a certain degree of protection for the coupling 62 and extending its service life. If the coupling 62 suddenly breaks during rotation, the protective cover 63 can also prevent the coupling 62 from flying out to prevent injury to surrounding personnel.

[0027] A balancing pipe 7 branches off from the outlet pipe 3. The end of the balancing pipe 7 away from the outlet pipe 3 is connected to the end of the mechanical seal 5 away from the impeller 2. A balancing tank 70 is installed on the balancing pipe 7. The balancing tank 70 can adjust the fluid pressure in the balancing pipe 7 according to actual conditions. The pressure on the left end of the mechanical seal 5 is the fluid pressure in the outlet pipe 3. The right end of the mechanical seal 5 is connected to the outlet pipe 3 via the balancing pipe 7, so the pressure on the right end of the mechanical seal 5 is also the fluid pressure in the outlet pipe 3. Therefore, the balancing pipe 7 and the balancing tank 70 can balance the pressures at both ends of the mechanical seal 5, making the pressures at both ends of the mechanical seal 5 equal, greatly reducing the offset of the mechanical seal 5, and thus minimizing damage to the impeller 2.

[0028] Example 2

[0029] Reference Figure 2-4 The difference between this embodiment and embodiment 1 is that an angle sensor 8 is installed on the outer shell of the pump impeller 2, and the angle sensor 8 is used to detect the swing angle of the pump impeller 2. An audible and visual alarm 9 is installed on the base 60. The angle sensor 8 is electrically connected to the audible and visual alarm 9 through a wire. When the angle sensor 8 detects that the swing angle of the pump impeller 2 exceeds the specified range, the audible and visual alarm 9 emits an alarm sound and continuously flashes a light to remind the staff that the pump impeller 2 has a fault.

[0030] A filter box 10 is installed on the outlet pipe 3, and a filter screen 11 is fixed inside the filter box 10. When the pump impeller 2 is damaged by a large fluid pressure, the filter screen 11 can promptly block the damaged fragments of the pump impeller 2 to prevent the fragments from following the fluid into the next device. The filter screen 11 can also filter impurities in the fluid.

[0031] A door 12 is installed on one of the walls of the filter box 10. The door 12 is hinged to the filter box 10 by hinges. Of course, sealing strips are provided around the door 12 to prevent the fluid from flowing out of the gap between the filter box 10 and the door 12. A locking assembly 13 for fixing the door 12 is provided on the outer wall of the filter box 10. The locking assembly 13 includes two parallel fixed plates 130. The fixed plates 130 are fixedly connected to the outer wall of the filter box 10. A locking rod 131 is slidably provided between the two fixed plates 130. A fixed block 132 is fixedly connected to the door 12. One end of the stop rod 131 is inserted into the fixed block 132, and the end of the locking rod 131 away from the fixed block 132 is fixedly connected to the pull ring 133. A support plate 134 is fixedly connected to the locking rod 131, and the support plate 134 is located between the two fixed plates 130. A spring 135 is provided between the support plate 134 and the fixed plate 130 close to the pull ring 133. The locking rod 131 is passed through the spring 135, and the spring 135 can push the support plate 134 to move toward the fixed block 132; the setting of the box door 12 makes it more convenient for the staff to clean the impurities in the filter box 10.

[0032] The above further describes the present invention with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A fluid delivery pump, mounted on a fluid delivery pipeline (1), characterized in that: The invention comprises a pump wheel (2), one end of the fluid delivery pipe (1) is connected to the inlet end of the pump wheel (2), the outlet end of the pump wheel (2) is connected to the outlet pipe (3), the pump wheel (2) is provided with a mechanical seal (5) and a driving assembly (6) for driving the pump wheel (2) to rotate, the outlet pipe (3) is connected to a balancing pipe (7), the end of the balancing pipe (7) away from the outlet pipe (3) is connected to the end of the mechanical seal (5) away from the pump wheel (2), and a balancing tank (70) is installed on the balancing pipe (7).

2. The fluid delivery pump according to claim 1, characterized in that: The drive assembly (6) comprises a base (60), the pump wheel (2) is mounted on the base (60), a drive motor (61) is also mounted on the base (60), and the output shaft of the drive motor (61) is connected to the rotating shaft of the pump wheel (2) via a coupling (62).

3. The fluid delivery pump according to claim 2, characterized in that: A protective cover (63) is provided on the base (60), and the protective cover (63) is sleeved on the coupling (62).

4. The fluid delivery pump according to claim 1, characterized in that: A flexible connection (4) is provided between the fluid delivery pipeline (1) and the inlet end of the pump wheel (2), and between the outlet pipeline (3) and the outlet end of the pump wheel (2).

5. The fluid delivery pump according to claim 2, characterized in that: An angle sensor (8) for detecting the swing angle of the pump wheel (2) is mounted on the pump wheel (2), an audible and visual alarm (9) is mounted on the base (60), and the angle sensor (8) and the audible and visual alarm (9) are electrically connected via a wire.

6. The fluid delivery pump according to claim 1, characterized in that: A filter box (10) is installed on the outlet pipe (3), and a filter screen (11) is provided in the filter box (10).

7. The fluid delivery pump according to claim 6, characterized in that: A door (12) is hinged on one of the box walls of the filter box (10), and a locking assembly (13) for fixing the door (12) is provided on the outer wall of the filter box (10).

8. The fluid delivery pump according to claim 7, characterized in that: The locking assembly (13) includes two fixing plates (130), the fixing plates (130) are fixed on the outer wall of the filter box (10), a locking rod (131) is slidably inserted between the two fixing plates (130), a fixing block (132) is fixed on the box door (12), one end of the locking rod (131) is inserted into the fixing block (132), a pull ring (133) is fixed on the end of the locking rod (131) away from the fixing block (132), a support plate (134) is fixed on the locking rod (131), the support plate (134) is located between the two fixing plates (130), a spring (135) is provided between the support plate (134) and the fixing plate (130) close to the pull ring (133), and the spring (135) pushes the support plate (134) to move in a direction close to the fixing block (132).

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