Centrifugal pump flow performance testing device and testing method

Abstract

The invention discloses a centrifugal pump flow performance testing device and method, and relates to the technical field of centrifugal pump flow performance tests.The centrifugal pump flow performance testing device comprises a testboard used for testing, a pump body to be tested is placed on the top of the testboard, and the water outlet end of the pump body is connected with a water outlet pipe used for discharging water through a flange plate; the water inlet end of the pump body is connected with a water inlet pipe used for water inflow through a flange plate, and one side of the water outlet pipe is connected with an electromagnetic flowmeter used for testing flow. According to the centrifugal pump flow performance testing device and testing method, a filter screen can be connected to the bottom of the water inlet pipe through a clamping block and a fixing block in a butt joint mode, the clamping block is limited through a pressing block in the fixing block, so that the filter screen is conveniently fixed, impurities in a water tank can be filtered through the filter screen, the impurities are prevented from entering a pump body, and the service life of the pump body is prolonged. And meanwhile, a rotating block can be rotated, so that the rotating block drives a brush plate to clean the filter screen through a first connecting shaft, and the condition that the filter screen is blocked is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal pump flow performance testing, in particular to a centrifugal pump flow performance testing device and testing method. BACKGROUND

[0002] After the centrifugal pump is produced, in order to judge whether it meets the design requirements, performance testing is needed, and the most critical is to test the flow performance of the centrifugal pump, so the flow performance testing of the centrifugal pump is an important means to evaluate its running efficiency and working state.

[0003] The existing centrifugal pump flow performance testing device is usually directly discharged through the water outlet pipe when in use, which leads to water resource waste during testing, and since there is no filtering mechanism at the water inlet end, impurities are easy to enter the pump body, causing pump body blockage and affecting the testing effect. SUMMARY

[0004] The present application aims to provide a centrifugal pump flow performance testing device and testing method to solve the problem of water flow recycling and filtering in the centrifugal pump flow performance testing device.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a centrifugal pump flow performance testing device, comprising: a test table for testing, a pump body to be tested is placed on the top of the test table, a water outlet pipe for water outlet is connected to the water outlet end of the pump body through a flange plate, a water inlet pipe for water inlet is connected to the water inlet end of the pump body through a flange plate, and an electromagnetic flowmeter for testing flow is connected to one side of the water outlet pipe.

[0006] A filter screen is installed at the bottom of the water inlet pipe, a first connecting shaft is installed in the middle of the filter screen, brush plates for cleaning and rotating blocks for pulling the first connecting shaft to rotate are respectively installed on the outer side of the first connecting shaft, a circular track is installed on the outer side of the filter screen, and a connecting block is slidably connected inside the circular track.

[0007] The end of the water outlet pipe away from the pump body is connected to a water tank, and the water inlet pipe is connected to the inside of the water tank.

[0008] The filter screen is also connected to a clamping block through a rotating shaft on both sides, a fixed block is sleeved on the outer side of the clamping block, a recess is formed in the middle of the fixed block, a spring is installed in the middle of the recess of the fixed block, and a pressing block is provided on one side of the spring.

[0009] Preferably, the bottom of the connecting block is connected to the rotating block, and the rotating block can rotate along the circular track through the connecting block.

[0010] Preferably, the card block is a "7" shaped structure, and the card block passes through the through slot in the middle of the fixing block, and the fixing block is installed on both sides of the water inlet pipe.

[0011] Preferably, the inside of the test bench is provided with a movable slot, a worm gear is installed in the inside of the movable slot, and a worm gear is engaged on one side of the worm gear for driving the rotation thereof.

[0012] Preferably, a second connecting shaft is connected through the middle of the worm gear, a gear one is installed on the outer side of the second connecting shaft and can rotate synchronously with the worm gear, and a gear two is engaged on both sides of the gear one.

[0013] Preferably, a driven shaft for synchronous rotation is connected through the middle of the gear two, a rotating block is connected on one side of the driven shaft, and a sliding block is connected on the end of the rotating block away from the driven shaft through a rotating shaft.

[0014] Preferably, an active block is connected on one end of the sliding block, an installation block is installed on the top of the active block and penetrates the movable slot of the test bench, and a clamping block for clamping the pump body is installed between the two groups of installation blocks.

[0015] Preferably, a connecting groove is formed in the middle of the clamping block, a plurality of steel balls are arranged in the connecting groove of the clamping block, and a telescopic block is connected through one side of the connecting groove of the clamping block.

[0016] Preferably, the sliding block can slide along the sliding groove on one side of the active block, and the active block can move left and right along the groove in the middle of the test bench.

[0017] A centrifugal pump flow performance testing method, comprising the following steps:

[0018] S1: first, place the pump body to be tested on the test bench, then clamp and fix the pump body through the clamping block, and connect the corresponding pipeline;

[0019] S2: then start the pump body, so that the water flow enters the pump body through the water inlet pipe, and then is discharged from the water outlet pipe;

[0020] S3: at this time, the electromagnetic flowmeter on the outside of the water outlet pipe can test the water flow in the water outlet pipe in real time;

[0021] S4: finally, the water flow in the water outlet pipe will flow back to the water tank, and then enter the pump body through the water inlet pipe, so as to facilitate the user to test.

[0022] Compared with the prior art, the beneficial effects of the present application are:

[0023] 1. The centrifugal pump flow performance testing device and testing method, the filter screen can be fixed at the bottom of the water inlet pipe through the cooperation of the clamping block and the fixed block, at this time, the filter screen can filter impurities in the water flow, and the brush plate can be rotated to clean the impurities attached to the bottom of the filter screen, so as to avoid the blockage of the filter screen;

[0024] 2. The centrifugal pump flow performance testing device and testing method, the cooperation of the worm gear and the worm enables the driven shaft to drive the rotating block to rotate, and then the movable block drives the clamping block to move, and the steel ball inside the clamping block and the telescopic block can clamp and fix pump bodies of different sizes, so as to increase the stability of the pump body. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a three-dimensional structure schematic diagram of the present application;

[0026] Figure 2 It is a three-dimensional structure schematic diagram of the testing table of the present application;

[0027] Figure 3 It is a three-dimensional structure schematic diagram of the testing table of the present application;

[0028] Figure 4 It is a three-dimensional structure schematic diagram of the clamping block of the present application;

[0029] Figure 5 It is a three-dimensional structure schematic diagram of the water inlet pipe of the present application;

[0030] Figure 6 It is a three-dimensional structure schematic diagram of the filter screen of the present application;

[0031] Figure 7 It is a three-dimensional structure schematic diagram of the fixed block of the present application;

[0032] Figure 8 It is a three-dimensional structure schematic diagram of the clamping block of the present application;

[0033] Figure 9 It is a flow structure schematic diagram of the operation method of the present application.

[0034] In the figure: 1, testing table; 2, pump body; 3, water outlet pipe; 4, water inlet pipe; 5, electromagnetic flowmeter; 6, water tank; 7, filter screen; 8, first connecting shaft; 9, brush plate; 10, rotating block; 11, circular track; 12, connecting block; 13, clamping block; 14, fixed block; 15, spring; 16, pressing block; 17, worm gear; 18, worm; 19, second connecting shaft; 20, gear one; 21, gear two; 22, driven shaft; 23, rotating block; 24, movable block; 25, mounting block; 26, clamping block; 27, steel ball; 28, telescopic block; 29, sliding block. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0036] See also Figure 1 The present invention provides a technical solution: a centrifugal pump flow performance test device and test method, comprising: a test bench 1, a pump body 2 to be tested is placed on the top of the test bench 1, the water outlet end of the pump body 2 is connected to a water outlet pipe 3 for water outlet through a flange, the water inlet end of the pump body 2 is connected to a water inlet pipe 4 for water inlet through a flange, and one side of the water outlet pipe 3 is connected to an electromagnetic flowmeter 5 for testing the flow rate. When in use, the pump body 2 can be opened, and then the water flow will be transported to the pump body 2 through the water inlet pipe 4, and then transported to the water outlet pipe 3 through the pump body 2. At this time, the electromagnetic flowmeter 5 can test the flow rate of the water flow.

[0037] exist Figure 1 Middle: The end of the water outlet pipe 3 away from the pump body 2 is connected to the water tank 6, and the water inlet pipe 4 is connected to the inside of the water tank 6. Since one end of the water outlet pipe 3 is connected to one side of the water tank 6, and the water inlet pipe 4 is connected to the water tank 6, the water in the water tank 6 is transported to the pump body 2 through the water inlet pipe 4, and then flows back to the water tank 6 through the water outlet pipe 3, so that the water flow can be continuously recycled and the waste of water resources can be reduced.

[0038] exist Figure 1 、 Figure 5 and Figure 6 Middle: A filter screen 7 is installed at the bottom of the water inlet pipe 4, a first connecting shaft 8 is installed in the middle of the filter screen 7, a brush plate 9 for cleaning and a rotating block 10 for pulling the first connecting shaft 8 to rotate are installed on the outside of the first connecting shaft 8, a circular track 11 is installed on the outside of the filter screen 7, and a connecting block 12 is slidably connected to the inside of the circular track 11. The bottom of the connecting block 12 is connected to the rotating block 10, and the rotating block 10 can rotate along the circular track 11 through the connecting block 12.

[0039] exist Figure 5 and Figure 6 Middle: By pulling the rotating block 10, the rotating block 10 drives the first connecting shaft 8 at one end to rotate. At the same time, the rotating block 10 will cause the top connecting block 12 to slide along the circular track 11 outside the filter 7 when rotating. When the first connecting shaft 8 rotates, it will synchronously drive the brush plate 9 at the bottom of the filter 7 to rotate, and the brush plate 9 is attached to the bottom of the filter 7. At this time, the brush plate 9 can clean up the impurities at the bottom of the filter 7, thereby avoiding clogging of the filter 7.

[0040] In Figures 5-7 , the two sides of the filter screen 7 are also connected with the clamping block 13 through the rotating shaft, the outer side of the clamping block 13 is sleeved with the fixed block 14, the clamping block 13 is a "7" shaped structure, and the clamping block 13 passes through the through slot in the middle of the fixed block 14, the fixed block 14 is installed on the two sides of the water inlet pipe 4, the middle of the fixed block 14 is also provided with a groove, and the middle of the groove of the fixed block 14 is installed with the spring 15, and one side of the spring 15 is provided with the pressing block 16 penetrating through the groove of the fixed block 14.

[0041] In Figure 6 , the two sides of the filter screen 7 are also connected with the clamping block 13 through the rotating shaft, the outer side of the clamping block 13 is sleeved with the fixed block 14, the clamping block 13 is a "7" shaped structure, and the clamping block 13 passes through the through slot in the middle of the fixed block 14, the fixed block 14 is installed on the two sides of the water inlet pipe 4, the middle of the fixed block 14 is also provided with a groove, and the middle of the groove of the fixed block 14 is installed with the spring 15, and one side of the spring 15 is provided with the pressing block 16 penetrating through the groove of the fixed block 14. Figure 7 In , the two sides of the filter screen 7 are also connected with the clamping block 13 through the rotating shaft, the outer side of the clamping block 13 is sleeved with the fixed block 14, the clamping block 13 is a "7" shaped structure, and the clamping block 13 passes through the through slot in the middle of the fixed block 14, the fixed block 14 is installed on the two sides of the water inlet pipe 4, the middle of the fixed block 14 is also provided with a groove, and the middle of the groove of the fixed block 14 is installed with the spring 15, and one side of the spring 15 is provided with the pressing block 16 penetrating through the groove of the fixed block 14.

[0042] In

[0043] , the two sides of the filter screen 7 are also connected with the clamping block 13 through the rotating shaft, the outer side of the clamping block 13 is sleeved with the fixed block 14, the clamping block 13 is a "7" shaped structure, and the clamping block 13 passes through the through slot in the middle of the fixed block 14, the fixed block 14 is installed on the two sides of the water inlet pipe 4, the middle of the fixed block 14 is also provided with a groove, and the middle of the groove of the fixed block 14 is installed with the spring 15, and one side of the spring 15 is provided with the pressing block 16 penetrating through the groove of the fixed block 14. Figures 1-3 In

[0044] , the two sides of the filter screen 7 are also connected with the clamping block 13 through the rotating shaft, the outer side of the clamping block 13 is sleeved with the fixed block 14, the clamping block 13 is a "7" shaped structure, and the clamping block 13 passes through the through slot in the middle of the fixed block 14, the fixed block 14 is installed on the two sides of the water inlet pipe 4, the middle of the fixed block 14 is also provided with a groove, and the middle of the groove of the fixed block 14 is installed with the spring 15, and one side of the spring 15 is provided with the pressing block 16 penetrating through the groove of the fixed block 14. Figure 3 Figure 4The worm 18 can be rotated to drive the worm gear 17 to rotate, and the worm gear 17 drives the gear one 20 to rotate through the second connecting shaft 19. The gear one 20 is connected with the gear two 21 on both sides, so that the gear one 20 drives the two groups of gear two 21 to rotate synchronously.

[0045] In Figure 4 The rotating block 23 is connected to one side of the driven shaft 22, and the other end of the rotating block 23 is connected to the sliding block 29 through a rotating shaft. The sliding block 29 is connected to the movable block 24, and the sliding block 29 can slide along the sliding groove on one side of the movable block 24. The movable block 24 can move left and right along the groove in the middle of the test bench 1.

[0046] In Figure 4 When the gear two 21 rotates, the rotating block 23 is driven to rotate through the driven shaft 22. The other end of the rotating block 23 is connected to the sliding block 29 through a rotating shaft. The sliding block 29 is connected to the sliding groove of the movable block 24, and the movable block 24 can only slide left and right along the movable groove in the middle of the test bench 1. Therefore, the two groups of rotating blocks 23 drive the two groups of movable blocks 24 to move closer to each other or move away from each other when rotating.

[0047] In Figure 4 With Figure 8 The top of the movable block 24 is provided with the mounting block 25 which penetrates the movable groove of the test bench 1. The two groups of mounting blocks 25 are provided with the clamping block 26 for clamping the pump body 2. The clamping block 26 is provided with a plurality of steel balls 27 in the connecting groove. The clamping block 26 is connected to the telescopic block 28 on one side.

[0048] In Figure 4 With Figure 8 The movable block 24 drives the mounting block 25 on the top to move left and right. The two groups of mounting blocks 25 are provided with the clamping block 26. By adjusting the position between the two groups of clamping blocks 26, different sizes of pump bodies 2 can be clamped. When the clamping block 26 moves towards the pump body 2, the telescopic block 28 on one side of the clamping block 26 is extruded by the pump body 2 and shrinks into the clamping block 26. The telescopic block 28 pushes the steel balls 27 in the connecting groove of the clamping block 26 to move, so that the telescopic block 28 which is extruded shrinks into the clamping block 26, and the telescopic block 28 which is not extruded by the pump body 2 is extruded by the steel balls 27 to the outside of the clamping block 26. The telescopic block 28 can clamp different sizes of pump bodies 2, so that the pump body 2 can be stably fixed on the test bench 1, and the test effect is not affected.

[0049] In Figure 9In the present application, the centrifugal pump flow performance testing device and testing method can be used to place the pump body 2 to be tested on the testing table 1 and fix it through the clamping block 26, then connect the drain pipe, the water inlet pipe 4 and the pump body 2 in sequence through the flange plate, at this time, open the pump body 2, the pump body 2 can send the water in the water tank 6 into the water outlet pipe 3 through the water inlet pipe 4, and then return to the water tank 6 from the water outlet pipe 3, at the same time, the water flow can be calculated by the electromagnetic flowmeter 5 on one side when passing through the water outlet pipe 3, and the calculation result is displayed in real time, so as to facilitate the testing of the flow performance of the centrifugal pump, and the contents not described in detail in the present application belong to the prior art known to those skilled in the art.

Claims

1. A centrifugal pump flow performance testing device, comprising: A test bench (1) for testing, characterized in that: a pump body (2) to be tested is placed on the top of the test bench (1); a water outlet end of the pump body (2) is connected to a water outlet pipe (3) for discharging water via a flange; a water inlet end of the pump body (2) is connected to a water inlet pipe (4) for inletting water via a flange; and an electromagnetic flowmeter (5) for testing flow is connected to one side of the water outlet pipe (3); A filter screen (7) is installed at the bottom of the water inlet pipe (4), a first connecting shaft (8) is installed in the middle of the filter screen (7), a brush plate (9) for cleaning and a rotating block (10) for pulling the first connecting shaft (8) to rotate are respectively installed on the outside of the first connecting shaft (8), a circular track (11) is installed on the outside of the filter screen (7), and a connecting block (12) is slidably connected inside the circular track (11); One end of the water outlet pipe (3) away from the pump body (2) is connected to a water tank (6), and the water inlet pipe (4) is connected to the interior of the water tank (6); The filter screen (7) is also connected to a clamping block (13) on both sides via a rotating shaft. A fixing block (14) is sleeved on the outer side of the clamping block (13). A groove is also provided in the middle of the fixing block (14). A spring (15) is installed in the middle of the groove of the fixing block (14). A pressure block (16) is provided on one side of the spring (15) and passes through the groove of the fixing block (14).

2. A centrifugal pump flow performance testing device according to claim 1, characterized in that: The bottom of the connecting block (12) is connected to the rotating block (10), and the rotating block (10) can be rotated along the circular track (11) through the connecting block (12).

3. A centrifugal pump flow performance testing device according to claim 1, characterized in that: The clamping block (13) is a "7"-shaped structure, and the clamping block (13) passes through the through slot in the middle of the fixing block (14), and the fixing block (14) is installed on both sides of the water inlet pipe (4).

4. A centrifugal pump flow performance testing device according to claim 1, characterized in that: A movable groove is provided inside the test bench (1), a worm wheel (17) is installed inside the movable groove, and one side of the worm wheel (17) is meshedly connected with a worm (18) for driving the worm wheel (17) to rotate.

5. A centrifugal pump flow performance testing device according to claim 4, characterized in that: A second connecting shaft (19) is connected through the middle of the worm wheel (17), and a gear 1 (20) that can rotate synchronously with the worm wheel (17) is installed on the outer side of the second connecting shaft (19), and both sides of the gear 1 (20) are meshed with gear 2 (21).

6. A centrifugal pump flow performance testing device according to claim 5, characterized in that: A driven shaft (22) for synchronous rotation is connected through the middle of the gear 2 (21), a rotating block (23) is connected to one side of the driven shaft (22), and a sliding block (29) is connected to one end of the rotating block (23) away from the driven shaft (22) through a rotating shaft.

7. A centrifugal pump flow performance testing device according to claim 6, characterized in that: One end of the slider (29) is connected to a movable block (24), the top of the movable block (24) is installed with a mounting block (25) that passes through the movable groove of the test bench (1), and a clamping block (26) for clamping the pump body (2) is installed between two groups of the mounting blocks (25).

8. A centrifugal pump flow performance testing device according to claim 7, characterized in that: A connecting groove is provided in the middle of the clamping block (26), and a plurality of groups of steel balls (27) are arranged in the connecting groove of the clamping block (26). A telescopic block (28) is connected through one side of the connecting groove of the clamping block (26).

9. A centrifugal pump flow performance testing device according to claim 6, characterized in that: The slider (29) can slide along the slide groove on one side of the movable block (24), and the movable block (24) can move left and right along the groove in the middle of the test bench (1).

10. A centrifugal pump flow performance testing method, which uses the centrifugal pump flow performance testing method according to claim 9, characterized in that: The following steps are involved: S1: First, place the pump body (2) to be tested on the test bench (1), then clamp the pump body (2) with a clamping block (26), and connect the corresponding pipeline at the same time; S2: Restart the pump body (2), so that water flows into the pump body (1) through the water inlet pipe (4) and then flows out of the pump body (2) through the water outlet pipe (3); S3: At this time, the electromagnetic flowmeter (5) outside the outlet pipe 3 can perform real-time testing of the water flow in the outlet pipe (3); S4: Finally, the water in the outlet pipe (3) will flow back into the water tank (6) and then enter the pump body (2) through the inlet pipe (4), making it easier for users to perform tests.

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