CN209990656U - Water outlet leakage net structure on water outlet pipeline of centrifugal pump open type test system - Google Patents
Water outlet leakage net structure on water outlet pipeline of centrifugal pump open type test system Download PDFInfo
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- CN209990656U CN209990656U CN201920122054.3U CN201920122054U CN209990656U CN 209990656 U CN209990656 U CN 209990656U CN 201920122054 U CN201920122054 U CN 201920122054U CN 209990656 U CN209990656 U CN 209990656U
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Abstract
The utility model relates to a water outlet leakage net structure on a water outlet pipeline of a centrifugal pump open type test system, which comprises a top steel pipe flange, a taper pipe with circumferential punched holes, an annular middle connecting plate, a straight pipe with circumferential punched holes, a water outlet cone and a circular punched hole bottom plate; the top steel pipe flange is fixed with the small-opening end of the conical pipe with the circumferential punched hole; the large opening end of the conical pipe with the circumferential punched hole is fixed with the annular middle connecting plate; one end of the straight pipe with the circumferential punched hole is connected with the annular middle connecting plate, and the other end of the straight pipe with the circumferential punched hole is connected with the annular punched hole bottom plate; the open end of the water outlet cone is fixed on the circular ring punching bottom plate, and a plurality of water leaking circular holes are formed in the circular ring punching bottom plate, the circular ring punching bottom plate and the circular ring punching conical pipe for circular punching; the water can be prevented from splashing to the test table surface due to pressure, and the cleanness and tidiness of the test table surface can be kept.
Description
Technical Field
The utility model relates to a go out water and leak the net structure, concretely relates to make outlet pipe's axial recoil force reduce to the minimum, make test pipeline and pump obtain the protection, it is more stable, reliable to be surveyed the unit operation, borrows the principle of water-stop simultaneously, reduces the time of water pump evacuation, increases work efficiency, prevents that the discharged water from splashing to go out water and leaking the net structure on the test table surface's open test system of centrifugal pump water piping of spouting because pressure
Background
It is known that any mechanical device is subjected to a series of tests when being developed and shipped out of a factory. The centrifugal pump is also required to be subjected to relevant test tests after being delivered from a factory or after being developed and formed, and the pump test is a test of finished product inspection properties of a product of a supplier (manufacturer) before delivery from the factory so as to check the stable quality condition of the delivered product. Such as: 1) whether abnormal vibration and noise exist after the computer is started. 2) Checking whether the temperature rise of the bearing and the shaft seal of the pump meets the requirement. 3) Checking the leakage degree of the shaft seal. 4) Measuring main performance parameter values (flow Q, lift H, input power P of the pump, rotating speed n, and equivalent of output power Pu of the pump and efficiency eta of the pump obtained by calculation) of the pump, and correlation curves of the main performance parameter values, namely H-Q curves, P-Q curves, eta-Q curves and the like. 5) And (5) inspecting the abrasion condition of mechanisms such as an opening ring and a bearing after the machine is stopped.
One pump is tested, a test bed is selected according to the flow rate, the power and the like of the tested pump in the early stage, and a corresponding instrument is selected according to relevant measurement parameters. Before installation, the motor and the water pump are installed on a base designed in the early stage, and meanwhile, the installation positions of the suction pipeline and the discharge pipeline and the seismic resistance of the foundation are considered. All equipment is securely mounted on the ground rail. Due to multiple factors, open test loop systems are commonly employed. The open test loop mainly comprises a suction pipeline system, a discharge pipeline system, a water pool, a pipeline bracket, an experiment platform and the like.
The water discharge pipeline system has the function of enabling liquid passing through the flow measurement section to smoothly flow into the water tank, so that the diameter of the water discharge pipe is equal to or larger than that of the flow measurement section. The length of the discharge pipe is determined by the installation height of the flow measurement section. However, the water outlet pipe is not suitable for being inserted into water (water splashes to the test table surface due to pressure) so as not to influence the discharge of gas in liquid. Especially when the flow rate is large, the whole protruding pipeline system can be caused to jump, so that a large pipeline bracket is usually selected to firmly fix the whole spitting pipeline system. Meanwhile, an elbow with the same nominal diameter can be installed at the downstream (behind) of the pressure measuring pipe at the discharge side for a general centrifugal pump, a mixed flow pump or an axial flow pump with lower lift, and an energy dissipater or a pressure reducing valve is reduced for a pump with higher lift so as to reduce the pressure of the whole system. (FIG. 8-1 is a perspective view of a standard spout pipe system of the start test stand)
However, at present, there are many small and medium-sized pump plants nationwide, so the scale and facilities of the test bench are not perfect and are limited everywhere. Particularly, for a centrifugal pump with large working condition, the valve is closed to start the pump, the water is filled by adopting a vacuumizing method in the early stage, and a gate valve on a water discharge pipeline system is in a fully closed state, but the sealing property is not good; secondly, because the higher pump of outlet pressure, in order to guarantee the clean and tidy of test table top, water can not be because of the too high splash of pressure, all can put the delivery port of water piping inside the pond. (fig. 8-2 is a perspective view of the open test water discharge pipe system without the water discharge leakage net in the present invention). At present, the system of fig. 8-2 is adopted more, but because the fastening of pipelines and units on site is not ideal, the recoil force of water at the water outlet to a water discharge pipeline system can extend to all parts of the pump unit, and various indexes of a pump-out factory test are seriously influenced. In the face of a limited experiment table, people only can develop a new method for avoiding data of testing indexes of a pump by a pipeline or external factors. Not only need consider test space and test simplicity, practicality, accuracy, also need corresponding improvement work efficiency, guarantee the clean and tidy etc. of testboard.
Figure 8-1 is a perspective view of a standard spout pipe system of the starting test rig. Fig. 8-2 is a perspective view of the open test water discharge pipe system without the water discharge leakage net of the present invention. Fig. 8-3 are the force analysis diagram of the open test water outlet pipe system without the water outlet leakage net.
In the existing more test sites of water pump plants, because the centrifugal pumps are all started by closing valves, the water discharge systems all adopt gate valves, are arranged near the water discharge elbow and are very close to the water outlet, and simultaneously adopt the water diversion mode of vacuum pumping, in order to shorten the vacuumizing time, under most conditions of the test sites, the open test water discharge pipe systems of the centrifugal pumps are as shown in the figure 8-2: the water outlet system is formed by connecting a conical pipe section, a straight pipe section, a flowmeter, a flow regulating valve, a elbow section, an automatic exhaust valve, a pipeline bracket and the like through bolts and fastening steel pipe flanges. The final discharge from the outlet elbow into the basin is via the following schematic (fig. 8-3) with the following force analysis:
the parameter is the outlet pressure P; outlet nominal diameter D.
By the above parameters, it is calculated that:
1) outlet flow area:
2) water surface force F at the moment of exit:
3) the magnitude of the force F' on the water outlet pipe is equal to F, and the direction is opposite:
in the test process of the tested pump, a force F is applied to the water surface at the moment when the water is discharged from the discharge pipe, all the reaction forces act on the bent pipe above the water surface, and the force F' is continuously transmitted, so that the whole system is in jumping, and the water pump unit is in vibration with frequency. Especially, the vibration in the vertical direction seriously exceeds the standard, and the noise of the unit is also very large.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model aims to provide a make outlet pipeline's axial recoil force reduce to the minimum, make experimental pipeline and pump protected, go out the water leakage net structure on the centrifugal pump open test system water piping that the unit operation is more stable, reliable by survey.
The structure can effectively avoid the interference of external factors on the delivery test of the pump unit, and meanwhile, the water seal can be used, so that the time for pumping vacuum and leading water of the water pump is greatly shortened, the test efficiency is improved, and the tidiness of the test table top can be ensured.
The utility model discloses a solve above-mentioned technical problem through following technical scheme: the utility model provides a go out water leakage net structure on centrifugal pump open test system water piping, go out water leakage net structure and install the aquatic in the play water return bend below of water pump on the centrifugal pump open test system water piping, go out water leakage net structure and include on the centrifugal pump open test system water piping: the water outlet device comprises a top steel pipe flange, a conical pipe with a circumferential punched hole, an annular middle connecting plate, a straight pipe with a circumferential punched hole, a water outlet cone and a circular punched hole bottom plate; the taper pipe with the circumferential punching hole comprises a large opening end and a small opening end; the top steel pipe flange is fixed with the small-opening end of the conical pipe with the circumferential punched hole; the large opening end of the conical pipe with the circumferential punched hole is fixed with the annular middle connecting plate; one end of the straight pipe with the circumferential punched hole is connected with the annular middle connecting plate, and the other end of the straight pipe with the circumferential punched hole is connected with the annular punched hole bottom plate; the opening end of the water outlet cone is fixed on the circular punching bottom plate, and the main body of the water outlet cone is positioned in the straight pipe of the circumferential punching hole; the circular punching device is characterized in that a plurality of water leaking circular holes are formed in the conical pipe of the circumferential punching, the straight pipe of the circumferential punching and the circular punching bottom plate, when the circular punching device is used, the top steel pipe is connected with the water outlet bent pipe of the pump body through a flange, and the sum of the areas of all the water leaking circular holes formed in the conical pipe of the circumferential punching, the straight pipe of the circumferential punching and the circular punching bottom plate is more than three times of the cross-sectional area of the water outlet bent pipe of the pump body.
In the embodiment of the present invention, the diameter of the circular hole on the circular punched hole bottom plate is in the range of 5-20 mm.
In the embodiment of the present invention, the inner hole of the annular intermediate connection plate is identical to the diameter of the large opening end of the taper pipe with the punched hole, and the outer circle of the annular intermediate connection plate is identical to the diameter of the punched straight pipe.
In the specific embodiment of the utility model, the diameter of the inner hole of the circular punching bottom plate is consistent with that of the bottom of the water outlet cone, and the diameter of the excircle is consistent with that of the punching straight pipe.
In a specific embodiment of the present invention, the water outlet cone is a hollow cone.
In the embodiment of the present invention, the taper pipe of the circumferential punching hole has an angle change of 3-5 degrees of a single side angle, the nominal diameter of the small diameter end of the taper pipe is determined by the nominal diameter of the flange of the top steel pipe, and the nominal diameter of the large diameter end of the taper pipe is 1.5-2 times the nominal diameter of the small diameter end of the taper pipe.
In a specific embodiment of the present invention, the diameter of the straight pipe of the circumferential punching is greater than twice the major diameter of the taper pipe of the circumferential punching.
In the embodiment of the present invention, the length of the straight pipe of the circumferential punching is 1.5 to 3 times the diameter.
In the specific embodiment of the present invention, when the internal diameter of the outlet of the pump is 600mm, the diameter of the circular hole is:
in the specific embodiment of the utility model, adopt the welding to form between top steel pipe flange, the taper pipe that the circumference punches a hole, annular intermediate junction board, the straight tube that the circumference punches a hole, go out the water cone and the ring bottom plate that punches a hole.
The utility model discloses an actively advance the effect and lie in: the utility model provides a water outlet leakage net structure on the water outlet pipeline of the centrifugal pump open type test system, which reduces the axial recoil force of the outlet pipeline to the minimum, protects the test pipeline and the pump, and ensures that the tested unit runs more stably and reliably; the running parameters of the pump such as vibration, noise and the like can be fed back accurately and truly, and meanwhile, the time of pumping vacuum of the water pump is shortened and the working efficiency is increased by using the water sealing principle; the water can be prevented from splashing to the test table surface due to pressure, and the cleanness and tidiness of the test table surface can be kept.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2-1 is a perspective view of a structural schematic diagram of the middle top steel pipe flange of the present invention.
Fig. 2-2 is a front view of the structural schematic diagram of the middle top steel pipe flange of the present invention.
Fig. 2-3 is a view a-a of fig. 2-2.
Fig. 3-1 is a schematic structural view of the cone pipe with circumferential holes punched in the present invention.
Fig. 3-2 is an expanded view of the structure schematic diagram of the taper pipe with the middle circumference punched hole of the present invention.
Fig. 3-3 are front views of schematic structural diagrams of the taper pipe with circumferential punching holes of the present invention.
Fig. 4-1 is a front view of the structural schematic diagram of the middle ring-shaped intermediate connecting plate of the present invention.
Fig. 4-2 is a left side view of the structural schematic diagram of the middle ring-shaped intermediate connection plate of the present invention.
Fig. 5-1 is a front view of the structure of the straight pipe with circumferential holes in the present invention.
Fig. 5-2 is a left side view of the structural schematic diagram of the straight pipe with the middle circumference punched hole of the present invention.
Fig. 6 is a perspective view of the middle water outlet cone of the present invention.
Fig. 7-1 is a perspective view of the middle ring punching bottom plate of the present invention.
Fig. 7-2 is a front view of the middle ring punching bottom plate of the present invention.
Fig. 7-3 are left side views of the middle ring punching bottom plate of the present invention.
Figure 8-1 is a perspective view of a standard spout pipe system of the starting test rig.
Fig. 8-2 is a perspective view of the open test water discharge pipe system without the water discharge leakage net of the present invention.
Fig. 8-3 are the force analysis diagram of the open test water outlet pipe system without the water outlet leakage net.
Fig. 9-1 is a perspective view of the open test water spout pipe system with the water outlet screen of the present invention.
Fig. 9-2 is a force analysis diagram of the open test water outlet pipe system with the water outlet leakage net of the present invention.
Detailed Description
The following provides a preferred embodiment of the present invention with reference to the accompanying drawings to explain the technical solutions of the present invention in detail.
Fig. 1 is the utility model discloses an overall structure schematic diagram, as shown in fig. 1, the utility model provides a water leakage net structure goes up to centrifugal pump open test system water piping, and this water leakage net structure goes up to centrifugal pump open test system water piping includes: the device comprises a top steel pipe flange 1, a conical pipe 2 with a circumferential punched hole, an annular middle connecting plate 3, a straight pipe 4 with a circumferential punched hole, a water outlet cone 5 and a circular punched bottom plate 6; the taper pipe 2 of the circumferential punching comprises a large-opening end 201 and a small-opening end 202; the top steel pipe flange 1 and the small-mouth end 202 of the conical pipe 2 with the circumferential punched holes are fixed together; the large opening end 201 of the taper pipe 2 with the circumferential punching hole is fixed with the annular middle connecting plate 3; one end of the straight pipe 4 with the circumferential punching hole is connected with the annular middle connecting plate 3, and the other end is connected with the circular punching bottom plate 6; the opening end of the water outlet cone 5 is fixed on the circular punching bottom plate 6, and the main body of the water outlet cone 5 is positioned in the straight pipe 4 of the circumferential punching; the taper pipe 2, the straight pipe 4 and the circular punching bottom plate 6 are provided with a plurality of water leaking circular holes 7, and when in use, the top steel pipe flange 1 is connected with the water outlet bent pipe of the pump body.
The water outlet leakage net structure is formed by punching, rolling and welding 6 common hot rolled steel plates with different sizes and made of Q235, and a steel pipe flange 1 at the top of the water outlet leakage net structure is rigidly connected with a bent pipe of a water outlet pipeline of a factory test of a water pump through bolts.
Fig. 2-1 is a perspective view of a structural schematic diagram of the middle top steel pipe flange of the present invention. Fig. 2-2 is a front view of the structural schematic diagram of the middle top steel pipe flange of the present invention. Fig. 2-3 is a view a-a of fig. 2-2. As shown in the above figures, the top steel pipe flange 1 is a standard flange, and the flange inner hole 101 is generally manufactured according to the steel pipe series II grade.
The nominal diameter of the top steel pipe flange 1 is determined by the nominal diameter of the water outlet elbow, and is determined by the diameter of the outlet of the water pump, and is larger than or equal to the diameter of the outlet.
Fig. 3-1 is a schematic structural view of the cone pipe with circumferential holes punched in the present invention. Fig. 3-2 is an expanded view of the structure schematic diagram of the taper pipe with the middle circumference punched hole of the present invention. Fig. 3-3 are front views of schematic structural diagrams of the taper pipe with circumferential punching holes of the present invention. As shown in the above figures: the production of the circumferentially punched conical tube 2 comprises the following additions: blanking according to the drawing of the figure 3-1, punching round holes 7 as many as possible in the figure 3-2, and finally rolling and welding into a cone as shown in the figure 3-3. The taper pipe 2 with the circumferential punched holes is changed at an angle of 3-5 degrees at one side, the nominal diameter of the small-diameter end of the taper pipe is determined by the nominal diameter of the steel pipe flange 1 at the top, the nominal diameter of the large-diameter end of the taper pipe is 1.5-2 times of the nominal diameter of the small-diameter end of the taper pipe, the punched holes are as many as possible, the size of the punched holes is determined according to site conditions, generally, the pump outlet diameter of 600mm is used, and the punched holes are made
Finally, the conical tube shown in figures 3-3 is formed.
Fig. 4-1 is a front view of the structural schematic diagram of the middle ring-shaped intermediate connecting plate of the present invention. Fig. 4-2 is a left side view of the structural schematic diagram of the middle ring-shaped intermediate connection plate of the present invention. As shown in the above figures: the annular intermediate connecting plate 3 is annular, the inner hole is consistent with the major diameter of the conical pipe 2 punched on the circumference, the outer circle is consistent with the diameter of the straight pipe 4 punched on the circumference (the diameter of the straight pipe 4 punched on the circumference is more than 2 times of the major diameter of the conical pipe 2 punched on the circumference), and finally the annular intermediate connecting plate is formed as shown in figure 4-1.
Fig. 5-1 is a front view of the structure of the straight pipe with circumferential holes in the present invention. Fig. 5-2 is a left side view of the structural schematic diagram of the straight pipe with the middle circumference punched hole of the present invention. The straight pipe 4 with the circumferential punching holes is a straight pipe with the same diameter, the length of the straight pipe is 1.5-3 times of the diameter, the punching holes are as many as possible, and finally the straight pipe is formed by crimping and welding, and finally the straight pipe is formed as shown in figures 5-1 and 5-2.
Fig. 6 is a perspective view of the middle water outlet cone of the present invention. The utility model discloses an among the concrete implementation, go out water cone 5 and be the circular cone hollow body, be fan-shaped according to size cutting steel sheet, then roll up the system welding and be a water cone 5, in order to prevent that rivers from forming the swirl in inside, form out unfavorable or bad phenomenon of water.
Fig. 7-1 is a perspective view of the middle ring punching bottom plate of the present invention. Fig. 7-2 is a front view of the middle ring punching bottom plate of the present invention. Fig. 7-3 are left side views of the middle ring punching bottom plate of the present invention. As shown in the above figures: the diameter of the inner hole of the circular punching bottom plate 6 is consistent with that of the bottom of the water outlet cone 5, the diameter of the outer circle of the circular punching bottom plate is consistent with that of the punching straight pipe 4, and the number of punched circular holes 7 is as large as possible.
The sum of the areas of all the circular holes 7 which are arranged on the conical pipe 2, the straight pipe 4 and the circular punching bottom plate 6 of the circular punching is more than three times of the cross section area of the water outlet bent pipe of the pump body.
Fig. 8 is a perspective view of the open test water outlet pipe system without the water outlet leakage net of the present invention. Fig. 9 is a perspective view of the open test water outlet pipe system with the water outlet leakage net of the present invention. As shown in fig. 8-9: the top steel pipe flange 1 is connected with a water outlet bent pipe 8 of the pump body, and the water outlet bent pipe 8 is connected with the straight pipe section.
The whole water outlet pipeline system is formed by connecting a conical pipe section 14, a first straight pipe section 15, a second straight pipe section 13, a flowmeter 12, a flow regulating valve 10, a water outlet bent pipe 8, an automatic exhaust valve 9, a pipeline support 11, a water outlet leakage net structure and the like which are connected with a water pump 16 through bolts and steel pipe flanges. In the final effluent to the pool, water is discharged through the schematic diagram of fig. 9-2, and the specific stress analysis is as follows:
the parameter is the outlet pressure P; the dimensions D1 and D2 at the position of the bottom screen are shown in the figure paper:
the total number of the mesh holes is S, the number of the mesh holes on the conical pipe 2 punched on the circumference is S1, the number of the mesh holes on the straight punching pipe 4 is S2, the number of the mesh holes on the bottom plate 6 is S3, and the diameter of one mesh hole is d.
By the above parameters, it is calculated that:
1) the water outlet flow area of the conical pipe 2 with the circumferential punching holes is as follows:
2) the water outlet flow area of the punching straight pipe 4 is as follows:
3) the water outlet flow area of the bottom plate 6 is as follows:
4)
(the recoil force around the circumference of the directional cone is offset by about 0)
5)
(the recoil force around the straight pipe is offset by about 0)
6)
(Direction is vertically downward, recoil force is vertically upward)
The resultant force borne by the water outlet leakage net structure is as follows:
from the above calculation, rivers are showing out the return bend and are getting into out the water leakage net, go out water through taper pipe 2, the straight tube 4 that punches a hole of circumference, and remaining water yield is from bottom plate 6 play water, and the atress is 0.3 times of original structure only to the biggest, because rivers run off constantly, to bottom D1 to D2 this within range, recoil force only can be littleer. This novel go out water and leak net structure not only effectually reduced out water recoil force, avoids the influence of external force to the system, has reduced a lot of troubles for the producer of test condition restriction simultaneously, has practiced thrift the test cost, provides work efficiency. The axial recoil force of the outlet pipeline is reduced to the minimum, so that the test pipeline and the pump are well protected, and the operation of the tested unit is more stable and reliable; the running parameters of the pump such as vibration, noise and the like can be fed back accurately and truly.
The utility model discloses obtained fine application at the in-process that a heavy load was tried the pump test, jumped to shake from entire system (including water pump unit) and get rid of all other problems, then through the preparation the utility model discloses a go out water and leak the net structure, prevent the external interference of taking for being tried the pump, the vibration of being tried the pump at last accords with standard GB 8098's requirement, and the obvious reduction of noise all has apparent effect simultaneously. The test bench brings great convenience for large-scale unit tests under the condition of limited test bench conditions, reduces the vacuumizing time, increases the working efficiency and saves the cost; prevent that the play water from splashing, guarantee the clean and tidy of test table face.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.
Claims (10)
1. The utility model provides a go out water leakage net structure on centrifugal pump open test system water piping, its characterized in that: go out water leakage net structural mounting in the aquatic of the water outlet return bend below of water pump on the centrifugal pump open test system water piping, go out water leakage net structural mounting on the centrifugal pump open test system water piping includes: the water outlet device comprises a top steel pipe flange, a conical pipe with a circumferential punched hole, an annular middle connecting plate, a straight pipe with a circumferential punched hole, a water outlet cone and a circular punched hole bottom plate; the taper pipe with the circumferential punching hole comprises a large opening end and a small opening end; the top steel pipe flange is fixed with the small-opening end of the conical pipe with the circumferential punched hole; the large opening end of the conical pipe with the circumferential punched hole is fixed with the annular middle connecting plate; one end of the straight pipe with the circumferential punched hole is connected with the annular middle connecting plate, and the other end of the straight pipe with the circumferential punched hole is connected with the annular punched hole bottom plate; the opening end of the water outlet cone is fixed on the circular punching bottom plate, and the main body of the water outlet cone is positioned in the straight pipe of the circumferential punching hole; the circular punching device is characterized in that a plurality of water leaking circular holes are formed in the conical pipe of the circumferential punching, the straight pipe of the circumferential punching and the circular punching bottom plate, when the circular punching device is used, the top steel pipe is connected with the water outlet bent pipe of the pump body through a flange, and the sum of the areas of all the water leaking circular holes formed in the conical pipe of the circumferential punching, the straight pipe of the circumferential punching and the circular punching bottom plate is more than three times of the cross-sectional area of the water outlet bent pipe of the pump body.
2. The centrifugal pump open test system water discharge pipeline upper water leakage net structure of claim 1, characterized in that: the diameter ranges of the conical pipe of the circumferential punching hole, the straight pipe of the circumferential punching hole and the circular hole on the circular punching bottom plate are 5-20 mm.
3. The centrifugal pump open test system water discharge pipeline upper water leakage net structure of claim 1, characterized in that: the inner hole of the annular intermediate connecting plate is consistent with the diameter of the large opening end of the conical pipe with the circumferential punched hole, and the outer circle of the annular intermediate connecting plate is consistent with the diameter of the punched straight pipe.
4. The centrifugal pump open test system water discharge pipeline upper water leakage net structure of claim 1, characterized in that: the diameter of the inner hole of the circular punching bottom plate is consistent with that of the bottom of the water outlet cone, and the diameter of the outer circle of the circular punching bottom plate is consistent with that of the punching straight pipe.
5. The centrifugal pump open test system water discharge pipeline upper water leakage net structure of claim 1, characterized in that: the water outlet cone is a conical hollow body.
6. The centrifugal pump open test system water discharge pipeline upper water leakage net structure of claim 1, characterized in that: the taper pipe with the circumferential punched hole is changed at an angle of 3-5 degrees at one side, the nominal diameter of the small-diameter end of the taper pipe is determined by the nominal diameter of a steel pipe flange at the top, and the nominal diameter of the large-diameter end of the taper pipe is 1.5-2 times of the nominal diameter of the small-diameter end of the taper pipe.
7. The centrifugal pump open test system water discharge pipeline upper water leakage net structure of claim 1, characterized in that: the diameter of the straight pipe of the circumferential punching hole is larger than twice of the major diameter of the taper pipe of the circumferential punching hole.
8. The centrifugal pump open test system water discharge pipeline upper water leakage net structure of claim 1, characterized in that: the length of the straight pipe of the circumferential punching hole is 1.5-3 times of the diameter.
9. The centrifugal pump open test system water discharge pipeline upper water leakage net structure of claim 1, characterized in that: when the internal diameter of pump export be 600mm, the diameter of round hole is:
10. the centrifugal pump open test system water discharge pipeline upper water leakage net structure of claim 1, characterized in that: the top steel pipe flange, the conical pipe with the circumferential punched hole, the annular middle connecting plate, the straight pipe with the circumferential punched hole, the water outlet cone and the annular punched hole bottom plate are welded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920122054.3U CN209990656U (en) | 2019-01-24 | 2019-01-24 | Water outlet leakage net structure on water outlet pipeline of centrifugal pump open type test system |
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| CN201920122054.3U CN209990656U (en) | 2019-01-24 | 2019-01-24 | Water outlet leakage net structure on water outlet pipeline of centrifugal pump open type test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654039A (en) * | 2019-01-24 | 2019-04-19 | 上海凯泉泵业（集团）有限公司 | A kind of centrifugal pump open type pilot system guttation pipeline upper water-out is slipped through the net structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654039A (en) * | 2019-01-24 | 2019-04-19 | 上海凯泉泵业（集团）有限公司 | A kind of centrifugal pump open type pilot system guttation pipeline upper water-out is slipped through the net structure |
| CN109654039B (en) * | 2019-01-24 | 2024-02-06 | 上海凯泉泵业（集团）有限公司 | Water outlet and leakage net structure on water spouting pipeline of centrifugal pump open type test system |
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