U-shaped backflow structure of liquid tank backflow pipe, liquid tank and water passing performance testing machine

Abstract

The utility model relates to the technical field of water passing performance testing equipment, in particular to a U-shaped backflow structure of a liquid tank backflow pipe, a liquid tank and a water passing performance testing machine. The U-shaped backflow structure comprises a backflow pipe and a flow meter used for detecting the flow in the backflow pipe. The backflow pipe sequentially comprises a head pipe section, a horizontally-arranged U-shaped pipe section and a tail pipe section in the direction from the head end to the tail end of the backflow pipe. The U-shaped pipe section sequentially comprises a first sub-section, a U-shaped bent section and a second sub-section in the direction from the head end to the tail end of the U-shaped pipe section. The flow meter is arranged at the U-shaped bent section, and the height of the U-shaped bent section is lower than the heights of the first sub-section and the second sub-section; the tail end of the head pipe section is connected with the first sub-section, and the head end of the tail pipe section is connected with the second sub-section. Due to the design of the U-shaped backflow structure of the backflow pipe of the liquid tank, the defect that the backflow pipe provided with a flow meter is not full of liquid can be overcome, the test value of the flow meter is more accurate, and abnormal noise is not prone to being caused by the change of the angle state of a valve on a pipeline in the water passing test.

Description

Technical Field

[0001] The present application relates to the technical field of water passing performance testing equipment, and particularly relates to a U-shaped reflux structure of a liquid tank reflux pipe, a liquid tank, and a water passing performance testing machine. Background Art

[0002] For existing standard flange type hot water circulation pumps with water inlet and outlet in the same horizontal direction, which need to conduct simulation terminal application scenario water passing performance tests during manufacturing and leaving the factory, water passing performance testing equipment is usually used to test their water passing performance.

[0003] There are defects in the design of the reflux pipe (the pipe flowing out from the pump body and returning to the box body) of the existing water passing performance testing equipment:

[0004] The reflux pipe of the existing equipment first extends horizontally above the liquid tank, and then bends and vertically inserts into the box body. The pipe is in a vertical shape, and the flowmeter is installed at the horizontal section of the reflux pipe on the top of the liquid tank. This design causes the water in the pipe where the flowmeter is installed to easily be in an under-filled state. Its defects not only make the measured value of the flowmeter distorted, but also easily cause abnormal noises due to the change of the valve angle state on the pipe during the water passing test. Utility Model Content

[0005] In order to solve the deficiencies of the existing technology mentioned in the above background art, the present application provides a U-shaped reflux structure of a liquid tank reflux pipe, and its technical solution is as follows:

[0006] The U-shaped reflux structure of the liquid tank reflux pipe includes a reflux pipe and a flowmeter for detecting the flow rate in the reflux pipe; along the direction from the head end to the tail end of the reflux pipe, the reflux pipe sequentially includes a head pipe section, a horizontally arranged U-shaped pipe section, and a tail pipe section; along the direction from the head end to the tail end of the U-shaped pipe section, the U-shaped pipe section sequentially includes a first sub-section, a U-shaped bend section, and a second sub-section; the flowmeter is arranged at the U-shaped bend section, and the height of the U-shaped bend section is lower than the heights of the first sub-section and the second sub-section; the tail end of the head pipe section is connected to the first sub-section, and the head end of the tail pipe section is connected to the second sub-section.

[0007] In some embodiments, the first sub-section, the U-shaped bend section, and the second sub-section are all horizontally arranged; wherein, the height difference between the first sub-section and the U-shaped bend section is greater than or equal to the diameter of the U-shaped pipe section, so as to form a height drop at the connection between the first sub-section and the U-shaped bend section; the height difference between the second sub-section and the U-shaped bend section is greater than or equal to the diameter of the U-shaped pipe section, so as to form a height drop at the connection between the second sub-section and the U-shaped bend section.

[0008] In some embodiments, along the direction gradually approaching the U-shaped bend section, the U-shaped pipe section is inclined downward, so that the height of the U-shaped bend section is lower than the heights of the first sub-section and the second sub-section.

[0009] In some embodiments, the flowmeter is disposed on one side of the U-shaped bend section close to the first sub-section.

[0010] In some embodiments, it further includes a first automatic valve disposed at the second sub-section; wherein, the first automatic valve is electrically connected to the control system;

[0011] In some embodiments, a quick connector for connecting with a gas communication pipe is provided at the bending portion of the U-shaped bend section; a switch member for opening and closing the quick connector is provided on the quick connector.

[0012] In some embodiments, along the direction from the head end to the tail end of the head pipe section, the head pipe section extends upward from bottom to top so as to communicate with the upper liquid outlet of the pump body, and its tail end is connected to the first sub-section; along the direction from the head end to the tail end of the tail pipe section, the tail pipe section extends downward from top to bottom so that its head end is connected to the second sub-section, and its tail end is used for communicating with the top area of the box body.

[0013] In some embodiments, a first mesh filter structure is provided at the tail end of the return pipe.

[0014] The present application also provides a liquid tank, which includes a box body and a return structure arranged above the box body; the return structure adopts the U-shaped return structure of the liquid tank return pipe as described above; the tail end of the return pipe of the return structure communicates with the top area of the box body so as to communicate with the internal liquid path of the box body.

[0015] In some embodiments, a V-shaped plate is provided on the bottom surface of the box body.

[0016] The present application also provides a water passing performance testing machine, which includes the U-shaped return structure of the liquid tank return pipe as described above, or includes the liquid tank as described above.

[0017] Based on the above, compared with the prior art, a U-shaped return structure of a liquid tank return pipe provided by the present application has the following beneficial effects:

[0018] The U-shaped return structure design of the liquid tank return pipe provided by the present application can overcome the defect that the liquid in the return pipe with a flowmeter installed is not full, make the test value of the flowmeter installed on the pipe body of the return pipe more accurate, and can also prevent abnormal noise from being easily caused by the change of the valve angle state on the pipeline during the water passing test.

[0019] Other features and beneficial effects of the present application will be described in the subsequent specification, and part of them will be obvious from the specification, or can be understood by implementing the present application. The purpose and other beneficial effects of the present application can be realized and obtained through the structures specifically pointed out in the specification, claims and drawings. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings; in the following description of the positional relationship of the drawings, unless otherwise specified, the directions shown by the components in the drawings are used as the reference.

[0021] Figure 1 Structural schematic of the water passing performance testing machine provided by an embodiment of the present application Figure 1 ;

[0022] Figure 2 For Figure 1 Partial enlarged view at position A in

[0023] Figure 3 Structural schematic diagram of the water passing performance testing machine for removing a pump product provided by an embodiment of the present application;

[0024] Figure 4 Structural schematic diagram of the quick automatic clamping device in the water passing performance testing machine provided by an embodiment of the present application;

[0025] Figure 5 Partial structural disassembly schematic diagram of the quick automatic clamping device in the water passing performance testing machine provided by an embodiment of the present application;

[0026] Figure 6 For Figure 4 Partial structural disassembly schematic diagram of

[0027] Figure 7 For Figure 4 Partial structural disassembly schematic diagram of the planar flange in

[0028] Figure 8 For Figure 4 Structural schematic diagram of the second annular fixture plate and the annular seal ring of the planar flange in

[0029] Figure 9 For Figure 4 Cross-sectional view of the second annular fixture plate of the planar flange in

[0030] Figure 10 For Figure 4 Structural schematic diagram of the bowl-shaped fixture of the bowl-shaped flange in

[0031] Figure 11 For Figure 10 C-C cross-sectional view of the bowl-shaped fixture in

[0032] Figure 12 Partial structural disassembly schematic diagram of the water passing performance testing machine provided by an embodiment of the present application;

[0033] Figure 13 is Figure 12 Partial enlarged view at position B in

[0034] Reference numerals:

[0035] 20 Pump body, 100 Quick automatic clamping device, 200 Load-bearing frame, 310 Box body, 320 Return flow structure, 330 Inflow structure, 410 Recovery tank, 420 Recovery pipe, 430 Water pump, 110 Frame, 120 Driving mechanism, 130 Bowl-shaped flange, 140 Flat flange, 111 Bottom plate, 112 Guide post, 113 Movable plate, 114 Top plate, 1111 First through hole, 1112 First opening, 1131 Second through hole, 1132 Second opening, 131 Bowl-shaped fixture, 1311 Raised outer ring, 1312 Groove, 1313 Pin hole, 1314 First fastening hole, 132 Positioning pin, 133 First washer, 141 Second annular fixture plate, 142 Second washer, 143 Annular seal, 144 Third washer, 1411 First fixing hole, 1412 Second fastening hole, 1421 Second fixing hole, 1431 Third fixing hole, 311 V-shaped plate, 312 Inclined plate, 321 Return pipe, 322 Flow meter, 323 First automatic valve, 324 Quick joint, 325 First mesh filter structure, 3211 First pipe section, 3212 First sub-section, 3213 U-shaped bend section, 3214 Second sub-section, 3215 Tail pipe section, 326 Built-in hose, 331 Inflow pipe, 332 Second automatic valve, 333 Branch drain pipe, 334 Third automatic valve, 335 Second mesh filter structure. Detailed implementation manners

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application; the technical features designed in different implementation manners of the present application described below can be combined with each other as long as they do not conflict with each other; based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0037] In the description of the present application, it should be noted that all terms used in the present application (including technical terms and scientific terms) have the same meanings as those commonly understood by those of ordinary skill in the art to which the present application pertains, and should not be construed as a limitation on the present application; it should be further understood that the terms used in the present application should be construed as having meanings consistent with their meanings in the context of this specification and the relevant art, and should not be understood in an idealized or overly formal sense, unless explicitly defined as such in the present application.

[0038] The present application provides a Figure 1-13 water passing performance testing machine as shown, which includes a liquid tank device, a quick automatic clamping device 100, a recycling device, a load-bearing frame 200 for carrying the quick automatic clamping device 100, a blowing and drying function device, and a filtering structure.

[0039] 1. For the quick automatic clamping device 100:

[0040] The quick automatic clamping device 100 includes a frame 110, a driving mechanism 120 fixed on the frame 110, a planar flange 140, and a bowl-shaped flange 130; a movable plate 113 is slidably connected to the frame 110; the movable plate 113 is located above the bottom plate 111 of the frame 110, and its top surface is connected to the output end of the driving mechanism 120, so that the driving mechanism 120 can drive the movable plate 113 to freely slide up and down on the frame 110 to adjust the distance between the movable plate 113 and the bottom plate 111; a first through hole 1111 for installing an inflow pipe 331 is provided on the bottom plate 111, and a bowl-shaped flange 130 is detachably connected to its top surface; a plurality of upwardly protruding positioning pins 132 are detachably connected inside the bowl-shaped flange 130, and the bowl-shaped flange 130 is matched with the lower pump head flange of the pump body 20, so that the protruding outer ring 1311 of the bowl-shaped flange 130 can be sleeved outside the lower pump head flange of the pump body 20, and the positioning pins 132 can be inserted into the installation holes of the lower pump head flange of the pump body 20 one by one; a second through hole 1131 for installing a return pipe 321 is provided on the movable plate 113, and a planar flange 140 is detachably connected to its bottom surface, and the planar flange 140 is matched with the upper pump head flange of the pump body 20 (the so-called matching between the two means that the planar flange 140 just fits inside the upper pump head flange, the outer edge of the upper pump head flange is sleeved on the outer peripheral wall of the planar flange 140, and the central through hole in the upper pump head flange corresponds to and communicates with the central through hole in the planar flange 140).

[0041] Specifically, during the test, the flange-type hot water circulation pump product to be tested is placed on the bowl-shaped flange 130. At this time, as Figure 2As shown, the raised outer ring 1311 of the bowl-shaped flange 130 just fits over the lower pump head flange of the pump body 20, and the positioning pins 132 are inserted into the mounting holes of the lower pump head flange of the pump body 20 one by one. The bowl-shaped flange 130 plays a dual positioning role in feeding (its structural design facilitates the centering and positioning of the product pump head during feeding, and the positioning pins 132 are snapped into the holes of the product pump head flange for positioning). At this time, the pump has been positioned and placed; then the driving mechanism 120 drives the movable plate 113 to move downward, driving the flat flange 140 to press on the upper pump head flange of the pump body 20 to complete the feeding operation (the discharging operation is vice versa).

[0042] At this time, through the downward force applied by the driving device, and the combined action of the flat flange 140 and the bowl-shaped flange 130 clamping the upper liquid outlet and the lower liquid inlet of the pump, the pump is automatically clamped between the two. When in use, the inlet pipe 331 and the return pipe 321 are fixedly connected to the through holes on the bottom plate 111 and the movable plate 113, and a sealed water flow path flowing through the inlet pipe 331, the pump, and the return pipe 321 can be formed. There is no need to frequently disassemble and replace the flanges on the inlet pipe 331 and the return pipe 321 or disassemble the screw fasteners on the flange of the pump, and the quick loading and unloading of the pump can be realized.

[0043] Among them, the flat flange 140 and the bowl-shaped flange 130 are important components for realizing the compatibility of flanges with different diameters; the flat flange 140 is adapted to the upper pump head flange of the pump body 20. When docking with the upper pump head channel, with the pressing force of the driving mechanism 120, it can effectively connect the return pipe 321 with the upper pump head channel and prevent liquid leakage at this place; the bowl-shaped flange 130 plays a dual positioning role in feeding. The design of its raised outer ring 1311 facilitates the centering and positioning of the pump product during feeding, and when installed, the positioning pins 132 can be snapped into the mounting holes of the lower pump head flange of the product one by one for further positioning and fixing, which can effectively connect the inlet pipe 331 with the lower pump head channel and prevent liquid leakage at this place. Moreover, during the installation and disassembly process of the flat flange 140 and the bowl-shaped flange 130, there is no need to install and disassemble screws to effectively connect the inlet pipe 331 and the return pipe 321 with the pump head channel. Due to the detachable design of the flat flange 140 and the bowl-shaped flange 130, through the design of the driving mechanism 120 and the movable plate 113, the distance and clamping force between the flat flange 140 and the bowl-shaped flange 130 can be adjusted. When in use, for pump products with different lengths (heights) and different diameters, only by simply replacing the flat flange 140 and the bowl-shaped flange 130 with different model sizes, the compatibility and common use of the equipment can be realized, solving the problems that the existing feeding and discharging processes of connecting the pump head and the pipeline require frequent disassembly or installation of screws on the flange, resulting in high labor costs, difficult operation, and slow efficiency, and solving the problems of low efficiency, difficult operation, and high labor and equipment costs caused by the need to frequently install flanges with corresponding diameters when switching pump models.

[0044] The quick automatic clamping device 100 can achieve quick clamping in place and quick release and unloading of the pump, making the loading and unloading processes of the product efficient and convenient. It has characteristics such as high efficiency of loading and unloading clamping, compatibility with pump bodies 20 of different models, and convenience of operation. This device overcomes the defects of the existing water passing performance testing machine, such as slow loading and unloading efficiency, difficult operation, time-consuming and laborious loading and unloading when changing the corresponding caliber flange on the pipeline when switching pump models, single function and poor compatibility when the testing machine is applied to the testing of pump products of different models, high labor cost, and high equipment cost. It plays roles such as saving manpower and equipment loss, saving time and effort in operation, being convenient to use, and improving production efficiency.

[0045] (1) Bowl-shaped flange 130

[0046] Optionally, the bowl-shaped flange 130 includes a bowl-shaped fixture 131, a positioning pin 132, and a first washer 133; the bowl-shaped fixture 131 includes a first annular fixture plate, and an upwardly protruding outer ring 1311 is provided on the outer periphery of the top surface of the first annular fixture plate, so that a groove 1312 is formed on the top surface of the bowl-shaped fixture 131; the first washer 133 is provided in the groove 1312; a plurality of pin holes 1313 are provided on the first annular fixture plate, the pin holes 1313 are matched with the positioning pin 132, and the first washer 133 is provided with a clearance in the area corresponding to the pin holes 1313, so that the positioning pin 132 can protrude upward smoothly without being blocked by the first washer 133, so that the positioning pin 132 is clamped in the pin holes 1313 and protrudes upward;

[0047] Among them, the bowl-shaped fixture 131 is matched with the lower pump head flange of the pump body 20, so that the outer ring 1311 of the convex part of the bowl-shaped flange 130 can be sleeved outside the lower pump head flange of the pump body 20, and the positioning pins 132 can be inserted into the mounting holes of the lower pump head flange of the pump body 20 one by one (that is, the groove 1312 is matched with the lower pump head flange of the pump body 20, and the positioning pin 132 is matched with the mounting hole of the lower pump head flange of the pump body 20).

[0048] The bowl-shaped flange 130 plays a dual positioning role in loading, and its raised outer ring 1311 design facilitates the centering positioning of the pump product when loading, and the positioning pin 132 can be inserted into the mounting hole of the lower pump head flange of the product one by one for further positioning and fixing during installation, which can effectively connect the inlet pipe 331 with the lower pump head channel and prevent liquid leakage there; through the structural design of the bowl-shaped flange 130, the pump head flange of the pump body 20 can be quickly positioned and firmly fixed during the installation of the bowl-shaped flange 130. Compared with the method of fixing the pump head flange of the pump body 20 with screws, the bowl-shaped flange 130 of the present application does not require the installation and disassembly of cumbersome screw fasteners during the installation and disassembly process, and the operation is more convenient, effectively reducing the waste of production time and cost; wherein, the first gasket 133 is designed in the bowl-shaped flange 130 to cooperate with each other to improve the sealing performance. In addition, for pump products with different pump head calibers, it is only necessary to simply replace the bowl-shaped flange 130 of different models and sizes to achieve compatibility and commonality.

[0049] Optionally, the first annular fixture plate, the raised outer ring 1311 , the groove 1312 , and the first gasket 133 are all annular structures.

[0050] It should be noted that most of the flanges of existing pump heads are annular flanges. To match them, the various components of the bowl-shaped flange 130 of the embodiment of the present application respectively adopt an annular structure. According to the above design concept, the shape and size of the bowl-shaped flange 130 and its various components can be adaptively adjusted according to the structural requirements of the pump body 20.

[0051] Optionally, the top surface of the base plate 111 is detachably connected to the bowl-shaped flange 130; wherein, the bowl-shaped fixture 131 is provided with a plurality of first fastening holes 1314 for installing first fasteners; the base plate 111 is provided with a plurality of first openings 1112 for installing first fasteners, and the first fastening holes 1314 match the first openings 1112, so that the bowl-shaped fixture 131 and the base plate 111 are detachably fastened and connected via the first fasteners.

[0052] Optionally, a plurality of the pin holes 1313 are arranged in a ring shape at equal angles on the first annular fixture plate.

[0053] Optionally, a plurality of the first fastening holes 1314 are arranged in a ring shape at equal angles on the first annular fixture plate.

[0054] The pin holes 1313 and the first fastening holes 1314 of the embodiment are arranged in a staggered and equiangular ring shape on the first annular fixture plate, which is beneficial to improving the installation stability of the bowl-shaped flange 130 and the positioning and fixing stability of the pin holes 1313 on the lower pump head flange of the pump body 20.

[0055] Optionally, the pin holes 1313 are arranged around the periphery of the first washer 133.

[0056] The first washer 133 is provided with a cutout in the area corresponding to the pin holes 1313, so that the positioning pin 132 can smoothly protrude upward without being obstructed by the first washer 133.

[0057] Optionally, the positioning pin 132 is a conical positioning pin 132. Optionally, the positioning pin 132 is a conical-shaped positioning pin 132.

[0058] Optionally, the positioning pin 132 is installed in the pin holes 1313 of the bowl-shaped flange 130 by means of screw fastening.

[0059] It should be noted that the pin holes 1313, the first fastening holes 1314, and the positioning pins 132 of this embodiment are arranged in a staggered and equally-angled circular pattern on the first annular jig plate. For the number and positions of the pin holes 1313, the first fastening holes 1314, and the positioning pins 132, those skilled in the art can make adaptive adjustments, including but not limited to the embodiment solutions.

[0060] Optionally, the first fastener is a screw fastener.

[0061] (2) Flat flange 140

[0062] Optionally, the flat flange 140 includes a second annular jig plate 141; a plurality of second fastening holes 1412 for installing second fasteners are provided in the second annular jig plate 141, a plurality of second openings 1132 for installing second fasteners are provided on the movable plate 113, and the second openings 1132 are matched with the second fastening holes 1412, so that the second annular jig plate 141 and the movable plate 113 are detachably and firmly connected by the second fasteners.

[0063] Optionally, a gasket structure fixedly connected thereto is provided on the bottom surface of the second annular jig plate 141; the gasket structure includes a second washer 142. Further optionally, the gasket structure sequentially includes a second washer 142 and an annular sealing ring 143 from top to bottom; the second washer 142 is fixedly connected to the second annular jig plate 141, and the annular sealing ring 143 is fixedly connected to the second washer 142.

[0064] A gasket structure is provided on the side of the flat flange 140 close to the upper flange of the pump head, further improving the sealing and leak prevention performance of the flow path.

[0065] Optionally, a third washer 144 is provided on the top surface of the second annular jig plate 141.

[0066] On the side of the planar flange 140 close to the movable plate 113, a third washer 144 is provided to further improve the sealing and leakage prevention performance of the flow path.

[0067] Optionally, a plurality of the second fastening holes 1412 are arranged in an equiangular annular pattern on the second annular jig plate 141.

[0068] The equiangular annular arrangement of the second fastening holes 1412 is conducive to improving the mounting stability of the planar flange 140 on the movable plate 113.

[0069] Optionally, first fixing holes 1411, second fixing holes 1421, and third fixing holes 1431 for installing third fasteners are respectively provided on the second annular jig plate 141, the second washer 142, and the annular seal 143; the first fixing holes 1411, the second fixing holes 1421, and the third fixing holes 1431 are matched, and among them, the third fastener can be sequentially screwed into the second annular jig plate 141, the second washer 142, and the annular seal 143, so that the second annular jig plate 141, the second washer 142, and the annular seal 143 are detachably fixedly connected through the third fastener.

[0070] Optionally, the first fixing holes 1411, the second fixing holes 1421, and the third fixing holes 1431 are all arranged on the outer circle of the second fastening holes 1412.

[0071] Optionally, the second fastener and the third fastener are screw fasteners.

[0072] Optionally, the second washer 142 is a customized silicone washer.

[0073] Optionally, the second washer 142 is a thickened silicone washer with a thickness of 5 - 8 mm.

[0074] In this embodiment, the selected second washer 142 has a Shore hardness of 55 ± 5, and its performance requirements include wear resistance, acid and alkali resistance, corrosion resistance, good sealing, strong toughness, long life, moderate hardness and good resilience, etc., and its temperature resistance parameter is -60°C to -200°C, and its cross-section, inner cross-section, cut edges, etc. are required to be smooth and neat.

[0075] It should be noted that:

[0076] In this embodiment, the second annular jig plate 141, the second washer 142, and the annular seal 143 are connected by screw fasteners. In addition to the above fastener connection method, the second washer 142 and the annular seal 143 may also be connected by other methods. For example, during the experimental verification process of this application, methods such as glue bonding and inlaying in the inner groove 1312 are also used for installation, but compared with the fastener connection method, its disadvantage is that it is not durable enough and may fall off during use.

[0077] Most of the upper pump head flanges of the existing pump body 20 adopt circular flanges. To be adapted thereto, optionally, the second annular fixture plate 141, the second gasket 142, and the annular seal 143 of the planar flange 140 in the embodiment of the present application are all circular structures. According to the above design concept, the shape and size of the planar flange 140 can be adaptively adjusted according to the structural requirements of the pump body 20.

[0078] The second fastening holes 1412, the first fixing holes 1411, the second fixing holes 1421, and the third fixing holes 1431 in this embodiment are arranged in an equiangular annular manner. For the number and positions of the second fastening holes 1412, the first fixing holes 1411, the second fixing holes 1421, and the third fixing holes 1431, those skilled in the art can make adaptive adjustments, including but not limited to the embodiment solutions.

[0079] (3) Frame 110, drive mechanism 120, bottom plate 111, movable plate 113

[0080] Optionally, the frame 110 includes a top plate 114, a bottom plate 111, a plurality of guide posts 112, and a movable plate 113; the plurality of guide posts 112 are vertically arranged between the top plate 114 and the bottom plate 111 for supporting the top plate 114; the drive mechanism 120 is fixedly connected to the top plate 114, and a linear bearing matching the guide posts 112 is provided on the movable plate 113. Among them, the linear bearing is sleeved on the guide posts 112 so that the movable plate 113 is located between the top plate 114 and the bottom plate 111, and the drive mechanism 120 can drive the movable plate 113 to freely slide up and down on the guide posts 112 to adjust the distance between the movable plate 113 and the bottom plate 111.

[0081] Optionally, the top plate 114 and the bottom plate 111 are respectively installed at the upper end and the lower end of the guide posts 112 by means of screw fastening.

[0082] In this embodiment, four guide posts 112 are used to support the four corners of the bottom plate 111 and the top plate 114. Synchronously, linear bearings are designed at the four corners of the movable plate 113 for sleeving and sliding up and down in the four guide posts 112. With the four-corner design of the four guide posts 112, it can ensure that the top plate 114 and the movable plate 113 are pressed together with parallel forces, which helps to improve the operation and downward pressure stability of the fast automatic clamping device 100.

[0083] It should be noted that: according to the above design concept, for the design scheme of the number and positions of the guide posts 112, those skilled in the art can make adaptive adjustments, including but not limited to the embodiment solutions, but the embodiment solutions are preferably selected.

[0084] Optionally, the drive mechanism 120 is a cylinder.

[0085] In this embodiment, one cylinder is installed on each of the left and right sides under the top plate 114 by means of screw fastening; the stroke shaft (i.e., the output end) of the cylinder is fastened to the top surface of the movable plate 113 by screws.

[0086] It should be noted that: according to the above design concept, the number of the driving mechanisms 120 includes but is not limited to two, and those skilled in the art can make adaptive adjustments; moreover, other linear reciprocating driving mechanisms 120 can also be used, including but not limited to cylinders. For example, a hydraulic device, an oil pressure device, or a motor can be used to achieve the same effect as a pneumatic device (cylinder). Among them, the advantage of choosing a pneumatic cylinder is that its structure is simple and the cost is low, and the pressure of the standard parts of the pneumatic cylinder is known. The advantages of a hydraulic device, an oil pressure device, and a motor (servo motor) are that the downward pressure can be adjusted more precisely, and a pressure sensor needs to be added to detect the pressure. The disadvantages are that the structure is more complex, the control is more complex, and the cost is higher. The advantage is that the stroke control can be more precise (the stroke of the pneumatic cylinder can be adjusted. In this application scenario, the pressure does not need to be precisely controlled, as long as there is no water leakage. According to the height difference of the pump body 20, a pneumatic cylinder with a suitable stroke can be selected).

[0087] Optionally, the bottom plate 111 of the quick automatic clamping device 100 is fixedly installed on the load-bearing frame 200 by means of screw fastening.

[0088] It should be noted that: in this embodiment, two workstations are reserved on the load-bearing frame 200. This testing machine is designed with a total of two sets of quick automatic clamping devices 100, as well as two sets of return flow structures 320 and two sets of inlet flow structures 330 that match them. According to the above design concept, the number and positions of the quick automatic clamping device 100, the return flow structure 320, and the inlet flow structure 330 can be adaptively adjusted, including but not limited to the embodiment scheme.

[0089] In addition, in addition to the scheme where the bottom plate 111 is fixedly installed on the load-bearing frame 200 by means of screw fastening, the bottom plate 111 can also be designed with a liftable scheme, that is, a feeding support device is adopted: below the quick automatic clamping device 100, a lift driving mechanism 120 is provided on the load-bearing frame 200. The bottom plate 111 is also sleeved on the guide post 112 with a linear bushing, and the bottom surface of the bottom plate 111 is connected to the output end of the lift driving mechanism 120, and the bottom plate 111 can be driven to move up and down by the lift mechanism (this lift design is not shown in the figure).

[0090] 2. For the liquid tank device, the liquid tank device includes a tank body 310, a return flow structure 320, and an inlet flow structure 330.

[0091] The inlet flow structure 330 includes an inlet flow pipe 331. The head end of the inlet flow pipe 331 is connected to the bottom area of the box body 310 to communicate with the internal liquid path of the box body 310; its tail end is connected to the first through hole 1111 on the bottom plate 111 to communicate with the lower liquid inlet of the pump body 20.

[0092] The reflux structure 320 includes a reflux pipe 321. The head end of the reflux pipe 321 is connected to the second through hole 1131 on the movable plate 113 to communicate with the upper liquid outlet of the pump body 20; its tail end is connected to the top area of the box body 310 to communicate with the internal liquid path of the box body 310.

[0093] During testing, the liquid in the box body 310 flows out from the bottom inlet flow pipe 331, successively flows through the inlet flow pipe 331, the first opening 1112, the upper liquid outlet of the pump body 20, the pump body 20, the lower liquid inlet of the pump body 20, the second opening 1132, the reflux pipe 321, and flows back into the box body 310 from the top of the box body 310.

[0094] Optionally, the head end of the inlet flow pipe 331 is connected to the bottom plate 111 by a screw fastening connection method. Optionally, the head end of the reflux pipe 321 is connected to the movable plate 113 by a screw fastening connection method.

[0095] (1) For the reflux structure 320 (i.e., the U-shaped reflux structure 320 of the liquid tank reflux pipe 321):

[0096] The design of the reflux pipe 321 (the pipe flowing out from the pump body 20 and flowing back to the box body 310) of the existing water passing performance test equipment: The reflux pipe 321 of the existing equipment first extends horizontally above the liquid tank, and then bends and vertically inserts into the box body 310. The pipe is in a vertical state, and the flowmeter 322 is designed at the horizontal section of the reflux pipe 321 on the top of the liquid tank. This design causes the water in the pipe to easily be in an under-filled state, and its defects not only make the measured value of the flowmeter 322 distorted, but also cause abnormal noise to easily occur due to the change of the valve angle state on the pipe during the water passing test.

[0097] To solve the above problems, a U-shaped reflux structure 320 of the liquid tank reflux pipe is provided:

[0098] The reflux structure 320 includes a reflux pipe 321 and a flowmeter 322 for detecting the flow rate in the reflux pipe 321. The head end of the reflux pipe 321 is connected to the second through hole 1131 on the movable plate 113 to communicate with the upper liquid outlet of the pump body 20. Its tail end is communicated with the top area of the box body 310 to communicate with the internal liquid path of the box body 310. Along the direction from the head end to the tail end of the reflux pipe 321, the reflux pipe 321 successively includes a head pipe section 3211, a horizontally arranged U-shaped pipe section, and a tail pipe section 3215. The U-shaped pipe section is horizontally arranged in a U shape above the box body 310. Along the direction from the head end to the tail end of the U-shaped pipe section, the U-shaped pipe section successively includes a first sub-section 3212, a U-shaped bend section 3213, and a second sub-section 3214. The flowmeter 322 is arranged at the U-shaped bend section 3213, and the height of the U-shaped bend section 3213 is lower than the heights of the first sub-section 3212 and the second sub-section 3214. The tail end of the head pipe section 3211 is connected to the first sub-section 3212, and its head end is used to communicate with the upper liquid outlet of the pump body 20. The head end of the tail pipe section 3215 is connected to the second sub-section 3214, and its tail end is used to communicate with the top area of the box body 310.

[0099] In the present application, the reflux pipe 321 is designed to form a U-shaped structure, and the U-shaped bend section 3213 where the flowmeter 322 is designed and installed is at a low position. The function of the designed U-shaped bend section 3213 is similar to that of a "water seal bend". Through the U-shaped structure design and low position design at the U-shaped bend section 3213, water is stored in the U-shaped bend section 3213 to ensure that the pipes before and after the flowmeter 322 are full of water, improving the accuracy of the flowmeter 322. With such a structural design, the defect that the liquid in the reflux pipe with a flowmeter is not full can be overcome, making the test value of the flowmeter 322 installed on the top of the reflux pipe 321 more accurate, and also making it less likely that abnormal noises are caused by changes in the angle state of the valve on the pipe during the water passing test.

[0100] In order to make the height of the U-shaped bend section 3213 lower than the heights of the first sub-section 3212 and the second sub-section 3214, so that the U-shaped bend section 3213 forms a water seal bend, the present application provides the following two implementation manners:

[0101] The first one (as shown in Figure 3 the embodiment):

[0102] Optionally, the first sub-segment 3212, the U-shaped bend segment 3213, and the second sub-segment 3214 are all horizontally arranged above the box body 310; wherein, the height difference between the first sub-segment 3212 and the U-shaped bend segment 3213 is greater than or equal to the diameter of the U-shaped pipe segment, so that a height drop is formed at the connection between the first sub-segment 3212 and the U-shaped bend segment 3213; the height difference between the second sub-segment 3214 and the U-shaped bend segment 3213 is greater than or equal to the diameter of the U-shaped pipe segment, so that a height drop is formed at the connection between the second sub-segment 3214 and the U-shaped bend segment 3213.

[0103] The second type (not shown in the figure):

[0104] Optionally, along the direction gradually approaching the U-shaped bend segment 3213, the U-shaped pipe segment is arranged to slope downward, so that the height of the U-shaped bend segment 3213 is lower than the heights of the first sub-segment 3212 and the second sub-segment 3214.

[0105] In addition:

[0106] Optionally, along the direction from the head end to the tail end of the head pipe segment 3211, the head pipe segment 3211 extends upward from bottom to top, so as to be used for communicating with the upper liquid outlet of the pump body 20, and its tail end is connected to the first sub-segment 3212; along the direction from the head end to the tail end of the tail pipe segment 3215, the tail pipe segment 3215 extends downward from top to bottom, so that its head end is connected to the second sub-segment 3214, and its tail end is used for communicating with the top area of the box body 310.

[0107] Optionally, the middle section of the return pipe 321 is connected by an internal hose 326. Optionally, the middle of the first sub-segment 3212 is connected by an internal hose 326. Optionally, the internal hose 326 is a steel wire hose.

[0108] An internal hose 326 is arranged in the pipe wall of the return pipe 321 to enhance its pressure resistance performance (similar to the design of an explosion-proof tire) and mobility performance. This internal hose 326 cooperates with the movement of the movable plate 113. When the movable plate 113 rises, it drives the internal hose 326 to rise, and the same is true for the descent; the connection by the internal hose 326 is used to support the realization of the up and down telescopic displacement movement of the water outlet pipe. In this embodiment, the steel wire hose is connected in the return pipe 321 in a flange structure, and other connection methods can also be adaptively adopted.

[0109] Optionally, it further includes a first automatic valve 323 arranged at the second sub-segment 3214; wherein, the first automatic valve 323 is electrically connected to the control system, so that the control system controls the opening and closing of the first automatic valve 323.

[0110] A first automatic valve 323 is provided to control the opening and closing of the return pipe 321. By controlling the first automatic valve 323 through a control system, three state functions of the valve, namely fully open, fully closed, and half open, can be realized. Also, the function of setting the opening state of the valve at any angle can be realized, achieving automatic control of the flow path.

[0111] Optionally, the flowmeter 322 is arranged on one side of the U-shaped bend section 3213 close to the first sub-section 3212. Optionally, the detection site of the flowmeter 322 is 150 - 200 mm away from the bottom surface of the pipeline at its location. Optionally, the installation site of the first automatic valve 323 is 150 - 200 mm away from the end (water outlet) of the second sub-section 3214. Optionally, both ends of the first automatic valve 323 are connected to the second sub-section 3214 through a flange structure.

[0112] (2) For the inflow structure 330

[0113] The inflow structure 330 includes an inflow pipe 331. The head end of the inflow pipe 331 is connected to the bottom area of the box body 310 to communicate with the internal liquid path of the box body 310; its tail end is connected to the first through hole 1111 on the bottom plate 111 to communicate with the lower liquid inlet of the pump body 20.

[0114] Optionally, a second automatic valve 332 is further provided at the head end of the inflow pipe 331; wherein, the second automatic valve 332 is electrically connected to the control system so that the control system controls the opening and closing of the second automatic valve 332.

[0115] A second automatic valve 332 is provided to control the opening and closing of the inflow pipe 331. By controlling the second automatic valve 332 through a control system, three state functions of the valve, namely fully open, fully closed, and half open, can be realized. Also, the function of setting the opening state of the valve at any angle can be realized, achieving automatic control of the flow path.

[0116] Optionally, the head end of the inflow pipe 331 is connected to the box body 310 by means of screw fastening, and its tail end is also connected to the bottom plate 111 by means of screw fastening.

[0117] (3) Box body 310

[0118] There are defects in the design of the liquid tank of the existing water passing performance test equipment:

[0119] The bottom surface of the existing equipment box body 310 is in a horizontal flat bottom state, and there is no filter screen at the pipeline water outlet of the box body 310. As a result, foreign matters generated during actual use and iron filings generated in the pump body 20 will flow into the box body 310, polluting the water quality, thereby affecting the performance test of the pump, and resulting in the need for frequent maintenance and water change operations in actual applications, which is time-consuming and laborious.

[0120] To solve the above problems:

[0121] Optionally, a V-shaped plate 311 is provided on the bottom surface of the box body 310; the V-shaped plate 311 includes two sub-plates; along the direction from both sides of the box body 310 to the middle thereof, the two sub-plates incline downward and are connected to each other in the middle to form the V-shaped plate 311.

[0122] With such a design, the defect that it is difficult to clean foreign matters and iron filings in the bottom of the flat-bottom box can be overcome, providing a convenient and comfortable method for actual use and maintenance.

[0123] Optionally, in the area below the tail end of the return pipe 321, an opening is provided at the top of the box body 310, and an inclined plate 312 that inclines downward is provided at the opening. The inclined plate 312 does not completely close the opening to leave a gap.

[0124] Among them, the liquid flowing out of the return pipe 321 is guided by the inclined plate 312 and flows into the box body 310. With such a design, the violent impact of the water flow on the box body 310 can be avoided.

[0125] Optionally, a liquid level sensor (not shown in the figure) is provided in the box body 310, and the liquid level sensor is electrically connected to the control system. Optionally, a water level observation scale (not shown in the figure) is provided on the back surface of the box body 310.

[0126] When the liquid level sensor senses a lack of liquid, liquid feeding is performed. For example, the box body 310 is provided with a liquid supplement connecting pipe. After the control system receives the information of the liquid level sensor, it controls the automatic valve of the liquid supplement connecting pipe to open to supplement liquid from an external source into the box body 310; or, the control system controls the water pump 430 to pump the liquid in the recovery tank 410 into the box body 310.

[0127] Optionally, it is set that the height difference between the liquid level in the box body 310 and the height of the pump body 20 (i.e., the hot water circulation pump to be tested) after feeding is greater than 1 m (referring to the height difference between the maximum height of the pump body 20 and the liquid level in the water tank is greater than 1 m).

[0128] Using the built-in program and parameter design of the control system, it is designed that when the liquid level height in the box body 310 is 1 m lower than the pump body 20 after feeding, the above-mentioned liquid supplement program is started. By designing the height difference between the two and using the principle of water pressure difference, the air gap noise generated in the pipeline during the water passing test can be reduced.

[0129] 3. Recycling device

[0130] Optionally, the recovery device includes a recovery tank 410 located below the quick automatic clamping device 100; a branch drain pipe 333 is provided on the inlet pipe 331, wherein one end of the branch drain pipe 333 is connected to the inlet pipe 331, and the other end thereof is a drain port; the drain port is in liquid communication with the recovery tank 410, and a valve is provided on the branch drain pipe 333; optionally, a third automatic valve 334 is provided on the branch drain pipe 333; the third automatic valve 334 is electrically connected to the control system so that the control system controls the opening and closing of the third automatic valve 334.

[0131] Optionally, one end of the branch drain pipe 333 is connected to the inlet pipe 331, and the other end thereof extends and is arranged above the recovery tank 410 so that the drain port of the branch drain is in liquid communication with the recovery tank 410.

[0132] After the test is completed, the branch drain pipe 333 is opened by opening the third automatic valve 334, and the second automatic valve 332 is closed, so that the residual liquid in the flow path of the return pipe 321, the pump body 20, and the inlet pipe 331 is discharged into the recovery tank 410 through the branch drain pipe 333, which is convenient for recovery and reuse.

[0133] It should be noted that:

[0134] The "liquid path connection" described herein does not mean that the entire flow path needs to be connected by fixed pipelines to form a connected flow path, but also includes using the action of gravity to form an open flow path to connect the liquids. For example, the liquid flow at the drain port of the branch drain pipe 333 falls into the recovery tank 410 by gravity. Although there is no pipeline connection between the two, a liquid path connection is formed.

[0135] In addition, there are defects in the design of the inlet and outlet water control of the existing water passing performance test equipment:

[0136] The valves on the pipelines of the existing equipment rely entirely on manual switching operations. Especially after the test is completed, the residual water in the pump body 20 and the pipelines is easy to flow to the ground or requires manual use of containers to receive and pour it back into the box body 310. Defects such as low automation level increase the operation intensity of workers, are time-consuming and laborious, and increase the production cost.

[0137] The first automatic valve 323, the second automatic valve 332, and the third automatic valve 334 of the present application adopt electric valves; by controlling the automatic valves through the control system, the three state functions of automatic full opening, full closing, and half opening of the valves can be realized, and the function of setting the opening state of the valves at any angle can also be realized. Setting the above automatic valves can automatically control the opening and closing of the pipelines and realize functions such as automatic control of the water inlet and drainage of the equipment. In addition, optionally, the first automatic valve 323, the second automatic valve 332, and the third automatic valve 334 can be installed on the pipeline by means of flange plate type screw fastening.

[0138] Optionally, the recovery tank 410 is connected to the upper part of the box body 310 through a recovery pipe 420, and a water pump 430 is provided on the recovery pipe 420; the water pump 430 is electrically connected to the control system.

[0139] During use, the water pump 430 pumps the water flow in the recovery tank 410 back into the box body 310 for recycling.

[0140] Optionally, a support cover plate (not shown in the figure) is provided at the opening above the recovery tank 410;

[0141] The support cover plate can block foreign objects, sundries, dust, etc. from falling into the recovery tank 410.

[0142] Optionally, a liquid level sensor (not shown in the figure) is provided in the recovery tank 410.

[0143] When the liquid level sensor senses water, the control system triggers the start of the water pump 430 to pump the water back into the box body 310.

[0144] Optionally, the recovery tank 410 is fixed below the quick automatic clamping device 100 by welding.

[0145] 4. For the filtering structure

[0146] Optionally, a first mesh filtering structure 325 is provided at the tail end of the return pipe 321, so that after the fluid flows out of the return pipe 321 and is filtered by the first mesh filtering structure 325, it flows into the box body 310.

[0147] Optionally, a second mesh filtering structure 335 is provided at the drain outlet of the branch drain pipe 333, so that after the fluid flows out of the branch drain pipe 333 and is filtered by the second mesh filtering structure 335, it flows into the recovery tank 410.

[0148] The above filtering structure of the present application and the design of the V-shaped plate 311 of the box body 310 cooperate to overcome the defects of rust oxides in the product pump body 20 polluting the water quality of the water tank and interfering with the product test noise, and at the same time overcome and solve the defect of difficult maintenance, making it more convenient and reassuring to use.

[0149] 5. For the air blowing and drying function device

[0150] The air blowing and drying function device includes a gas source and a gas communication pipeline;

[0151] Optionally, a quick connector 324 for connecting with the gas communication pipeline is provided at the bent portion of the U-shaped bend section 3213, and a switch member for opening and closing the quick connector 324 is provided on the quick connector 324.

[0152] After the test, operate the first automatic valve 323 and the second automatic valve 332 to close, open the third automatic valve 334, connect one end of the gas connection pipe to the gas source and the other end to the quick connector 324. Open the switch of the quick connector 324, and purge through the U-shaped bend section 3213 by filling the pressure gas source from the gas source. Under the action of the gas pressure, the residual liquid in the reflux structure 320, the inflow structure 330 and the pump body 20 is accelerated to be discharged from the branch drain pipe 333 to the recovery tank 410.

[0153] By configuring a blowing and drying function on the U-shaped bend section 3213, the drying time can be customized. On the one hand, the residual liquid is recycled, and on the other hand, the residual water can be quickly and effectively dried, so that the pump products passing the test can be packaged and sold, overcoming the defect that the pump head of the product is prone to residual water after the water passing test, and saving the labor cost and time for drying.

[0154] It should be noted that:

[0155] In this embodiment, the gas source can be supplied by an air compressor, or can be provided by other gas source generation supply paths such as a compressed air pipeline; the switch on the quick connector 324 is an electromagnetic valve electrically connected to the control system. The quick connector 324 (blowing point) is threadedly installed between the first automatic valve 323 and the flow meter 322. The on-off of the blowing is controlled by the control system to control the opening and closing of the electromagnetic valve. The control system and the electromagnetic valve cooperate to customize functions such as blowing duration, interval, and blowing size adjustment.

[0156] The gas source and the gas connection pipe of the blowing and drying function device are not the main body structure of this testing machine. It can adopt a temporary external device, that is, it can be temporarily externally connected to a gas source during operation (usually manufacturing factories are equipped with air compressors or compressed air pipelines, etc., which can be used as independent external devices for generating gas sources). This testing machine only needs to be equipped with a quick connector 324 with a switch, and this function can be realized by externally connecting a gas source through the quick connector 324 during use.

[0157] In addition, the control system is prior art. For example, a PLC controller can be used. It has a programmable memory for storing internal programs, executing logical operations, sequential control, timing, counting, and arithmetic operations and other user-oriented instructions, and controlling various types of machinery or production processes through digital or analog input / output. It is prior art, and the control system will not be elaborated here. The working principle of the cooperation between the automatic valve, the water pump 430, various sensors and the control system for signal reception - information processing - feedback is also prior art, and will not be elaborated here.

[0158] In addition, this application also provides an operation example of the water passing performance testing machine (there are two method steps for the water passing performance testing machine: automatic mode and manual mode):

[0159] The steps of the water passing performance test method in automatic mode are as follows:

[0160] ① Manually load the water pump product (i.e., the orchid disc type hot water circulation pump) into the bowl-shaped flange 130 of the fast automatic clamping device 100;

[0161] ② Press the one-key button to start the lifting drive mechanism 120 of the loading support device, and raise the loading support device to hold the product (if there is a designed loading support device, this step is adopted; if not, it is not);

[0162] ③ Press the one-key button to start the drive mechanism 120, and control the movable plate 113 to descend and press and hold the upper flange of the water pump product; at this time, the positioning pins 132 on the bowl-shaped flange 130 can be inserted into the mounting holes of the lower pump head flange of the pump body 20 one by one to fix the water pump product;

[0163] ④ Connect the power supply to the product frequency converter;

[0164] ⑤ Press the one-key button to start the test, and automatically complete closing the third automatic valve 334, opening the second automatic valve 332, the first automatic valve 323, and the power supply frequency converter, and automatically customize and set the test time according to the product technical requirements to complete the water passing performance test in three states of fully open, half open, and fully closed of the first automatic valve 323, and automatically record and display the flow rate, pressure values, and curve graphs in the three states;

[0165] ⑥ After the test is completed, by controlling the states of the switch parts of the quick interface, the third automatic valve 334, the second automatic valve 332, the first automatic valve 323, etc., automatically complete the valve opening and closing and pipeline drainage, automatically complete drying the product pump body 20, and after continuous beeping prompts, press the test stop and disconnect the power cord;

[0166] ⑦ Press the one-key button to start the drive mechanism 120, and control the movable plate 113 to lift up to release the water pump product;

[0167] ⑧ Press the one-key button to start the lifting drive mechanism 120 of the loading support device, and lower the loading support device (if there is a designed loading support device, this step is adopted; if not, it is not);

[0168] ⑨ Manually unload and take out the water pump product, and one product test is completed. Repeat steps 1-9 for loading to test the next product.

[0169] The steps of the water passing performance test method in manual mode:

[0170] ① Manually load the water pump product into the bowl-shaped flange 130 of the fast automatic clamping device 100.

[0171] ② Start the lifting drive mechanism 120 of the loading support device with one button, and lift the loading support device to hold the product (if there is a loading support device designed, this step is adopted, otherwise not);

[0172] ③ One-touch button type start driving mechanism 120 controls movable plate 113 to press down and mount the upper flange of water pump product; at this time, positioning pins 132 on bowl-shaped flange 130 can be inserted into the mounting holes of the lower pump head flange of pump body 20 one by one to fix the water pump product;

[0173] ④Connect the power supply to the product inverter.

[0174] ⑤ Manual interface, manually close the third automatic valve 334, open the second automatic valve 332, the first automatic valve 323, turn on the power supply inverter, manually operate the first automatic valve 323 to fully open, half open, and fully closed three states of water flow performance test, automatically record and display the three states of flow, pressure values ​​and curves;

[0175] ⑥The test time is controlled manually, and the valve opening and closing and pipe drainage are completed by manual inching. The switch parts are manually inching to complete the product pump body 20 drying.

[0176] ⑦ One-touch button type start driving mechanism 120 controls the movable plate 113 to lift up and release the water pump product;

[0177] ⑧ Start the lifting drive mechanism 120 of the loading support device with one button, and lower the loading support device (if there is a loading support device designed, this step is adopted, otherwise not);

[0178] ⑨Manually unload the water pump product, which means that one product test has been completed, and repeat steps 1-9 to load the next product test.

[0179] The control panel and the buttons thereon are user-oriented operating devices in the control system. The test machine also includes a power supply frequency converter, which is electrically connected to the control system.

[0180] In summary, the embodiments of the present application have the following beneficial effects:

[0181] The present application can realize efficient clamping and automated water flow performance testing of flange-type hot water circulation pump series products, achieve the effect of compatible sharing of pump heads of different caliber sizes and pump bodies 20 of different length sizes, overcome the defect that the loading and unloading procedures of the manufacturing simulation application test process require frequent manual removal of screws, and provide a device and method for fast and efficient control clamping for the compatible sharing of different pump heads and pump bodies 20 of multiple specifications of flange-type hot water pump series.

[0182] This application can achieve efficient clamping and automatic water passing performance testing for a series of flange-type hot water circulation pumps, achieving the effect of compatible sharing of pump heads with different caliber sizes and pump bodies with different length sizes, and realizing the effect of rapid and efficient automatic clamping, connection, water passing testing, and functional testing. It solves the problems that the loading and unloading processes of the connection and docking between the existing pump head and the pipeline require frequent disassembly or installation of the screws on the flange, resulting in high labor costs, difficult operation, and slow efficiency. It also solves the problems that frequent installation of corresponding caliber flanges is required when switching pump models, resulting in low efficiency, difficult operation, and high labor and equipment costs. This provides a good choice of testing equipment and testing methods for reducing the manufacturing cost and the investment cost of fixed assets in this industry.

[0183] The testing machine provided by this application has high efficiency in loading and unloading clamping, is functionally compatible with pumps of different heights and calibers, is convenient to operate, and has good economic performance in terms of usage cost.

[0184] It should be noted that:

[0185] The four-column pneumatic quick clamping device (i.e., the quick automatic clamping device 100) provided by the embodiment of this application can achieve one-key operation for efficient and rapid loading and unloading of products and clamping in place for starting testing. This device plays the role of saving manpower, time, and effort, and is convenient to use, overall improving the production efficiency by 600% (the efficiency comparison data between the new and old devices is: the existing old version of the testing machine takes 25 minutes per unit per station, and the new version of the testing machine in the embodiment of this application takes 5 minutes per unit per station). The specific improvement value of the production efficiency is an example in this embodiment, and this article does not limit it.

[0186] When conducting tests on a series of (different caliber) water pumps, the testing machine can be designed with an inlet pipe 331 and a return pipe 321 corresponding to the largest caliber to ensure that the flow rate meets the usage requirements; when detecting a water pump with a smaller caliber, testing can be carried out by replacing the corresponding bowl-shaped flange 130 and flat flange 140, improving the versatility of the equipment (wherein, the inner hole calibers of the flat flange 140 and the bowl-shaped flange 130 corresponding to the pump can limit the flow rates of the inlet pipe 331 and the return pipe 321, so that the testing is not affected by the diameters of the inlet pipe and the outlet pipe).

[0187] In addition, those skilled in the art should understand that although there are many problems in the prior art, each embodiment or technical solution of this application can be improved in only one or several aspects, and it is not necessary to solve all the technical problems listed in the prior art or the background art at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation to that claim.

[0188] Although terms such as liquid tank device and recovery device are used more frequently in this text, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of this application; interpreting them as any additional limitation is contrary to the spirit of this application. The terms "first", "second", etc. (if any) in the specification, claims, and the above-mentioned drawings of the embodiments of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0189] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A U-shaped reflux structure of a liquid tank reflux pipe, characterized in that: It comprises a reflux pipe (321) and a flow meter (322) for detecting the flow in the reflux pipe (321); Along the direction from the head end to the tail end of the return pipe (321), the return pipe (321) sequentially comprises a head pipe section (3211), a horizontally arranged U-shaped pipe section, and a tail pipe section (3215); Along the direction from the head end to the tail end of the U-shaped pipe section, the U-shaped pipe section includes a first sub-segment (3212), a U-shaped bend section (3213), and a second sub-segment (3214) in sequence; the flow meter (322) is arranged at the U-shaped bend section (3213), and the height of the U-shaped bend section (3213) is lower than the heights of the first sub-segment (3212) and the second sub-segment (3214); The tail end of the first pipe section (3211) is connected to the first sub-section (3212), and the head end of the tail pipe section (3215) is connected to the second sub-section (3214).

2. The U-shaped reflux structure of the liquid tank reflux pipe according to claim 1 is characterized in that: The first sub-segment (3212), the U-shaped curved segment (3213), and the second sub-segment (3214) are all arranged horizontally; Wherein, the height difference between the first sub-segment (3212) and the U-shaped curved segment (3213) is greater than or equal to the diameter of the U-shaped tube segment, so that a height difference is formed at the connection between the first sub-segment (3212) and the U-shaped curved segment (3213); The height difference between the second sub-segment (3214) and the U-shaped curved segment (3213) is greater than or equal to the diameter of the U-shaped tube segment, so that a height difference is formed at the connection between the second sub-segment (3214) and the U-shaped curved segment (3213).

3. The U-shaped reflux structure of the liquid tank reflux pipe according to claim 1 is characterized in that: Along the direction gradually approaching the U-shaped bend section (3213), the U-shaped tube section is tilted downward so that the height of the U-shaped bend section (3213) is lower than the heights of the first sub-segment (3212) and the second sub-segment (3214).

4. The U-shaped reflux structure of the liquid tank reflux pipe according to claim 1, characterized in that: The flow meter (322) is arranged on a side of the U-shaped bend section (3213) close to the first subsection (3212).

5. The U-shaped reflux structure of the liquid tank reflux pipe according to claim 1, characterized in that: It also includes a first automatic valve (323) disposed at the second subsection (3214); wherein the first automatic valve (323) is electrically connected to a control system; And / or, a quick connector (324) for connecting to a gas communication pipeline is provided at the bending portion of the U-shaped bent section (3213); and a switch member for opening and closing the quick connector (324) is provided on the quick connector (324).

6. The U-shaped reflux structure of the liquid tank reflux pipe according to claim 1, characterized in that: Along the direction from the head end to the tail end of the first pipe section (3211), the first pipe section (3211) is arranged to extend upward from bottom to top so as to be connected to the upper liquid outlet of the pump body (20), and the tail end thereof is connected to the first subsection (3212); Along the direction from the head end to the tail end of the tail pipe section (3215), the tail pipe section (3215) is arranged to extend downward from top to bottom so that its head end is connected to the second sub-section (3214), and its tail end is used to communicate with the top area of ​​the box body (310).

7. The U-shaped reflux structure of the liquid tank reflux pipe according to claim 1, characterized in that: A first mesh filtering structure (325) is provided at the tail end of the return pipe (321).

8. A liquid tank, characterized in that: It comprises a box body (310) and a reflux structure (320) arranged above the box body (310); wherein the reflux structure (320) adopts the U-shaped reflux structure of the liquid tank reflux pipe according to any one of claims 1 to 7; The tail end of the reflux pipe (321) of the reflux structure (320) is connected to the top area of ​​the box (310) so as to be connected to the internal liquid path of the box (310).

9. The liquid tank according to claim 8, characterized in that: The bottom surface of the box body (310) is provided with a V-shaped plate (311).

10. A water flow performance tester, characterized in that: A U-shaped reflux structure comprising a liquid tank reflux pipe as described in any one of claims 1 to 7, or a liquid tank as described in any one of claims 8 to 9.

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