A small flow regulating valve flow testing device

Abstract

The embodiment of the application provides a small-flow regulating valve flow testing device, and relates to the technical field of regulating valve flow testing.The small-flow regulating valve flow testing device comprises a box body, a cover is arranged on the box body, a valve body is placed on the cover, a positioning assembly for fixing the valve body is arranged in a reserved cavity of the box body close to the cover, a first piston cylinder and a second piston cylinder are fixed to the outer side of the box body, and a supply assembly and a conveying assembly for supplying water to the valve body are arranged on the first piston cylinder and the second piston cylinder respectively.The device can realize high-low power switching work, flexibly switch the pressure state of liquid in the small-flow regulating valve, meet the supply requirements of different characteristic liquid, and discharge the liquid after regulating the flow of the valve body into a large measuring barrel, a middle measuring barrel and a small measuring barrel respectively, measure the flow rate ratio, and improve the comprehensiveness and accuracy of the flow test of different characteristic liquid.

Description

Technical Field

[0001] This invention belongs to the field of flow testing technology for regulating valves, and particularly relates to a flow testing device for small flow regulating valves. Background Technology

[0002] Control valves, also known as regulating valves, are key devices in industrial automation process control that regulate parameters such as flow rate, pressure, temperature, and liquid level of the medium. They are widely used in chemical, power, and metallurgical industries. By receiving signals from the control system, they automatically adjust their opening degree to achieve precise control of process parameters, especially the regulation and control of liquid fluids. There are many types of control valves, including small flow control valves.

[0003] Among existing technologies (patent application CN219244695U, patent title: Small Flow Control Valve Flow Testing Device), the former is simple to operate and highly practical: the small flow control valve flow testing device is easy to switch on and off, has high accuracy, and facilitates data reading and device operation during experiments. However, in implementing this technical solution, at least the following problems were found in the existing technology: Before a small flow regulating valve leaves the factory, its flow rate needs to be tested. Currently, most testing methods directly test the flow rate of the small flow regulating valve by pumping. Since the pumping flow rate varies, pumps with different power levels are required, which is too cumbersome, costly, and inconvenient to operate. Summary of the Invention

[0004] This application aims to at least solve the technical problem in the prior art of achieving high / low power switching supply and accurate detection of liquid volume capacity for different types of small-flow regulating valves under conditions where automatic positioning is not possible. To this end, this application proposes a flow testing device for small-flow regulating valves.

[0005] To achieve the above objectives, the specific technical solution of the present invention is as follows: A flow rate testing device for a small flow regulating valve includes a housing, a cover on the housing, and a valve body placed on the cover. A positioning component for fixing the valve body is provided in a reserved cavity near the cover of the housing. The outer side of the housing is respectively fixed with a first piston cylinder and a second piston cylinder, and the first piston cylinder and the second piston cylinder are respectively provided with a supply component and a conveying component for supplying water to the valve body. The outer side of the cover is provided with a test component for valve body flow detection.

[0006] Preferably, the positioning component further includes a dual-head motor embedded in the housing, and an electric push rod is fixed to one output shaft of the dual-head motor via a coupling. An upper main bevel gear is fixed to the piston rod of the electric push rod, and an upper auxiliary bevel gear is provided on the outer side of the upper main bevel gear. A threaded rod that rotates with the housing is fixed to the outer side of the upper auxiliary bevel gear.

[0007] Preferably, the threaded rod is threaded with a threaded sleeve, and a support arm is fixed on the threaded sleeve and slides with a pre-reserved inclined groove on the cover. A retainer is fixed on the inner side of the support arm, and a retaining groove is provided on the valve seat of the valve body to engage with the retainer. A mating protrusion is fixed in the middle of the cover, and a mating groove is provided on the valve seat of the valve body to engage with the mating protrusion.

[0008] Preferably, the supply assembly includes a lower main bevel gear sleeved on another output shaft of the dual-head motor, and a first lower auxiliary bevel gear and a second lower auxiliary bevel gear are respectively provided on the outer side of the lower main bevel gear, and a first electric telescopic rod and a second electric telescopic rod are respectively fixed on the outer side of the first lower auxiliary bevel gear and the second lower auxiliary bevel gear.

[0009] Preferably, the outer sides of both the first and second electric telescopic rods are fixed with cams via rotating shafts, and a spoiler frame is sleeved on the rotating shafts. A connecting rod is hinged to the cam, and a piston that slides and performs work with the first and second piston cylinders is hinged to the connecting rod.

[0010] Preferably, the conveying assembly includes a first three-way valve and a second three-way valve respectively connected to the first piston cylinder and the second piston cylinder, and the inner ends of the first three-way valve and the second three-way valve are connected to a water inlet pipe. The housing is provided with a water storage chamber connected to the water inlet pipe and is sealed with the reserved cavity of the housing.

[0011] Preferably, the outer ends of the first three-way valve and the second three-way valve are respectively connected to the first delivery pipe and the second delivery pipe, and the inner ends of the first delivery pipe and the second delivery pipe are connected to the three-way connector, and the three-way connector is connected to the booster pipe threadedly connected to the water inlet end of the valve body.

[0012] Preferably, the drain end of the valve body is threadedly connected to a drain pipe, and the outer end of the drain pipe is connected to a metal flexible hose. The valve body is equipped with a flow sensor with a display screen, and a monitoring mechanism is applied to monitor the flow rate of water flowing into the valve body through the booster pipe and out of the drain pipe.

[0013] Preferably, the test assembly includes an electric slide rail placed horizontally on the outside of the cover, and an electric slide rail base slides on the electric slide rail. A connecting seat is fixed on the electric slide rail base, and a filling tube communicating with a metal hose is sleeved inside the connecting seat. The bottom end of the filling tube is covered with a splash guard.

[0014] Preferably, a support is fixed on the outside of the box, and a weighing sensor is embedded on the support. A large measuring bucket, a medium measuring bucket, and a small measuring bucket are placed on the weighing sensor respectively. A liquid level sensor is embedded on the inside of the large measuring bucket, the medium measuring bucket, and the small measuring bucket, and a liquid level gauge is set on the outside.

[0015] The flow testing device for a small flow regulating valve of the present invention has the following advantages: 1. This small flow regulating valve flow testing device uses a dual-head motor of the positioning component to provide a unified drive source, saving power costs. After the meshing stroke between the upper main bevel gear and the upper auxiliary bevel gear is adjusted to the correct position by the electric push rod, the support arm on the threaded rod and threaded sleeve drives the retainer to lock into the retainer groove in the valve seat on the valve body. It is suitable for the positioning needs of different types of small flow regulating valves and avoids unstable shaking during the testing of small flow regulating valves.

[0016] 2. This small flow regulating valve flow testing device adjusts the meshing stroke between the first lower auxiliary bevel gear and the lower main bevel gear to the correct position via the first electric telescopic rod of the supply component, and adjusts the meshing stroke between the second lower auxiliary bevel gear and the lower main bevel gear to the correct position via the second electric telescopic rod. This allows the pistons on single or double sets of cams and connecting rods to perform high and low power work, flexibly switching the pressure state of the liquid supplied to the small flow regulating valve to meet the supply requirements of liquid fluids with different characteristics.

[0017] 3. This small flow regulating valve flow testing device, through the inlet pipes on the first and second three-way valves of the conveying component, meets the feeding requirements of liquid fluid under the action of a single or double set of pistons. Then, through the three-way connectors on the first and second conveying pipes, and through the booster pipe, it switches to convey the fluid into the valve body, realizing the conveying effect of liquid fluids with different characteristics. It is suitable for the supply of liquid fluids with different characteristics such as thin, viscous, and thick, and has a wide range of applications.

[0018] 4. This small flow regulating valve flow testing device achieves horizontal reciprocating movement through the electric slide rail and electric slide rail slide seat of the testing component, and through the filling pipe on the connecting seat, the liquid fluid after the valve body flow regulation is discharged into the large measuring tank, medium measuring tank and small measuring tank respectively to measure the flow rate ratio, thereby improving the comprehensiveness and accuracy of flow testing of liquid fluids with different characteristics. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a front view of the structure of a small flow regulating valve flow testing device according to the present invention; Figure 2 This is a rear view of the structure of a flow testing device for a small flow regulating valve according to the present invention; Figure 3 This is a side view of the structure of a flow testing device for a small flow regulating valve according to the present invention; Figure 4 This is an internal view of the structure of a flow testing device for a small flow regulating valve according to the present invention; Figure 5 This is a top view of the positioning component structure of the present invention; Figure 6 This is a bottom view of the valve body structure of the present invention; Figure 7 This is a side view of the structure of the first piston cylinder, the second piston cylinder, the supply assembly, and the conveying assembly of the present invention; Figure 8 This is a side cross-sectional view of the structure of the first piston cylinder, the second piston cylinder, and the supply assembly of the present invention; Figure 9 This is a partial side view of the structure of the delivery component and the testing component of the present invention; Figure 10 This is a partial cross-sectional view of the box body and cover structure of the present invention.

[0021] Explanation of markings in the diagram: 1. Housing; 2. Cover; 3. Valve body; 41. Dual-head motor; 42. Electric push rod; 43. Upper main bevel gear; 44. Upper auxiliary bevel gear; 45. Threaded rod; 46. Threaded sleeve; 47. Support arm; 48. Card seat; 49. Card slot; 5. First piston cylinder; 6. Second piston cylinder; 71. Lower main bevel gear; 72. First lower auxiliary bevel gear; 73. First electric telescopic rod; 74. Second lower auxiliary bevel gear; 75. Second electric telescopic rod; 76. Cam; 77. Connecting rod; 78. Piston; 81. First three-way valve; 82. Second three-way valve; 8 3. Inlet pipe; 84. First delivery pipe; 85. Second delivery pipe; 86. T-joint; 87. Booster pipe; 88. Drain pipe; 89. Metal hose; 91. Electric slide rail; 92. Electric slide rail base; 93. Connecting seat; 94. Filling pipe; 95. Large measuring tank; 96. Medium measuring tank; 97. Small measuring tank; 98. Liquid level sensor; 10. Inclined groove; 11. Docking protrusion; 12. Docking groove; 13. Flow sensor; 14. Display screen; 15. Splash guard; 16. Support seat; 17. Weighing sensor; 18. Water storage chamber; 19. Baffle frame. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments: like Figures 1-10As shown, a small flow regulating valve flow testing device of the present invention includes a housing 1, a cover 2 provided on the housing 1, which can be connected by snap-fit ​​or bolt-fit to facilitate the disassembly and assembly of the cover 2, and to regularly clean and maintain the exposed parts and space inside the housing 1. A valve body 3 is placed on the cover 2, and a positioning component for fixing the valve body 3 is provided in the reserved cavity of the housing 1 near the cover 2. It also includes a dual-head motor 41 embedded in the housing 1. The dual-head motor 41 provides a unified drive source, saving power costs. An electric push rod 42 is fixed to one output shaft of the dual-head motor 41 via a coupling. An upper main bevel gear 43 is fixed to the piston rod of the electric push rod 42. An upper auxiliary bevel gear 44 is provided on the outside of the upper main bevel gear 43. The meshing stroke between the upper main bevel gear 43 and the upper auxiliary bevel gear 44 is adjusted to the correct position by the electric push rod 42. A threaded rod 45 that rotates with the housing 1 is fixed on the outside of the upper auxiliary bevel gear 44. A threaded sleeve 46 is threadedly connected to the threaded rod 45, and a support arm 47 is fixed on the threaded sleeve 46 and slides with the inclined groove 10 reserved on the cover 2. A retainer 48 is fixed on the inner side of the support arm 47, and a retaining groove 49 is opened on the valve seat of the valve body 3 to engage with the retainer 48. The retainer 48 is driven by the support arm 47 on the threaded rod 45 and the threaded sleeve 46 to engage with the retaining groove 49 in the valve seat of the valve body 3. This is suitable for the positioning requirements of different types of small flow regulating valves and avoids unstable shaking during the testing of small flow regulating valves. The center of the cover 2 is fixed with a mating protrusion 11, and the valve seat of the valve body 3 is provided with a mating groove 12 that engages with the mating protrusion 11. The mating protrusion 11 and the mating groove 12 facilitate the pre-positioning of the valve body 3 on the cover 2, which plays a pre-installation role on the valve body 3 and facilitates the subsequent engagement and positioning of the seat 48 and the groove 49.

[0023] like Figures 1-10 As shown, a first piston cylinder 5 and a second piston cylinder 6 are fixed on the outside of the housing 1, and a supply component and a conveying component for supplying water to the valve body 3 are respectively provided on the first piston cylinder 5 and the second piston cylinder 6. The supply assembly includes a lower main bevel gear 71 mounted on another output shaft of the dual-head motor 41. A first lower auxiliary bevel gear 72 and a second lower auxiliary bevel gear 74 are respectively provided on the outer side of the lower main bevel gear 71. A first electric telescopic rod 73 and a second electric telescopic rod 75 are respectively fixed on the outer side of the first lower auxiliary bevel gear 72 and the second lower auxiliary bevel gear 74. The first electric telescopic rod 73 adjusts the meshing stroke between the first lower auxiliary bevel gear 72 and the lower main bevel gear 71 to achieve the low-power work effect of the single piston 78. Simultaneously, the second electric telescopic rod 75 adjusts the meshing stroke between the second lower auxiliary bevel gear 74 and the lower main bevel gear 71 to achieve the low-power work effect of the double piston 78. This meets the high and low power transportation needs of liquid fluids with different characteristics, replaces the traditional pumping method, saves costs, and is easy to operate. The outer sides of the first electric telescopic rod 73 and the second electric telescopic rod 75 are both fixed with cams 76 via rotating shafts, and a baffle 19 is sleeved on the rotating shaft. A connecting rod 77 is hinged to the cam 76, and a piston 78 that slides and performs work with the first piston cylinder 5 and the second piston cylinder 6 is hinged to the connecting rod 77. This allows the pistons 78 on the single or double sets of cams 76 and connecting rods 77 to perform high and low power work, flexibly switching the pressure state of the liquid supplied to the small flow regulating valve to meet the supply requirements of liquid fluids with different characteristics.

[0024] The conveying assembly includes a first three-way valve 81 and a second three-way valve 82 respectively connected to the first piston cylinder 5 and the second piston cylinder 6, and the inner ends of the first three-way valve 81 and the second three-way valve 82 are connected to a water inlet pipe 83. Through the water inlet pipe 83 on the first three-way valve 81 and the second three-way valve 82 of the conveying assembly, the feeding requirements of liquid fluid are met under the work cooperation of a single or double set of pistons 78. The tank 1 has a water storage chamber 18 connected to the water inlet pipe 83, and the water storage chamber 1 is sealed to prevent the liquid fluid in the water storage chamber 18 from entering the reserved cavity and causing water damage to the internal components. The upper and lower sides of the tank 1 near the water storage chamber 18 are respectively connected to the liquid inlet and the liquid outlet with one-way valves, so as to facilitate the addition and discharge of liquid fluid into the water storage chamber 18 in the tank 1.

[0025] Meanwhile, during the individual or simultaneous opening and rotation of the first electric telescopic rod 73 and the second electric telescopic rod 75, the turbulence frame 19 sleeved on the rotating shaft is used to turbulently stir the liquid fluids with different properties that have been added to the water storage chamber 18 in advance, especially to stir the viscous liquid fluids to prevent them from settling and solidifying. The outer ends of the first three-way valve 81 and the second three-way valve 82 are respectively connected to the first delivery pipe 84 and the second delivery pipe 85, and the inner ends of the first delivery pipe 84 and the second delivery pipe 85 are connected to the three-way connector 86. The three-way connector 86 is connected to the booster pipe 87, which is threadedly connected to the water inlet end of the valve body 3. The fluid is switched from the three-way connector 86 on the first delivery pipe 84 and the second delivery pipe 85 to the booster pipe 87, so as to realize the delivery effect of liquid fluids with different characteristics. It is suitable for the supply of liquid fluids with different characteristics such as thin, viscous and thick, and has a wide range of applications. The drain end of the valve body 3 is threadedly connected to a drain pipe 88, and the outer end of the drain pipe 88 is connected to a metal flexible hose 89. A flow sensor 13 with a display screen 14 is embedded on the valve body 3, and a monitoring mechanism is applied to the flow rate of water flowing into the valve body 3 through the booster pipe 87 and flowing out through the drain pipe 88. When the liquid fluid entering the valve body 3 is regulated by the valve body 3, the flow sensor 13 monitors the flow rate of the liquid fluid during the regulation period and displays it on the display screen 14.

[0026] like Figures 1-10 As shown, a test assembly for detecting the flow rate of valve body 3 is provided on the outer side of the cover 2. The test assembly includes an electric slide rail 91 placed horizontally on the outer side of the cover 2, and an electric slide rail seat 92 slides on the electric slide rail 91. The electric slide rail 91 and the electric slide rail seat 92 realize the horizontal reciprocating movement. A connecting seat 93 is fixed on the electric slide rail seat 92, and a filling tube 94 communicating with the metal hose 89 is sleeved inside the connecting seat 93. The bottom end of the filling tube 94 is covered with a splash guard 15. The splash guard 15 prevents splashing when the filling tube 94 discharges liquid fluid. A support base 16 is fixed to the outside of the housing 1, and a weighing sensor 17 is embedded in the support base 16. A large measuring barrel 95, a medium measuring barrel 96, and a small measuring barrel 97 are placed on the weighing sensor 17 respectively. The large measuring barrel 95, through the filling pipe 94 on the connecting seat 93, discharges the liquid fluid after the flow rate adjustment of the valve body 3 into the large measuring barrel 95, the medium measuring barrel 96, and the small measuring barrel 97 respectively to measure their flow rate ratio, thereby improving the comprehensiveness and accuracy of flow rate testing of liquid fluids with different characteristics.

[0027] Liquid level sensors 98 are embedded in the inner side of the medium measuring tank 96 and the small measuring tank 97, and liquid level gauges are set on the outer side. The liquid level of the liquid fluid added is monitored in real time by the liquid level sensors 98 on the large measuring tank 95, the medium measuring tank 96 and the small measuring tank 97. The liquid level count value is observed by visual inspection and then manually checked. The three sets of weighing sensors 17 on the support 16 weigh the liquid fluid added to the large measuring tank 95, the medium measuring tank 96 and the small measuring tank 97 in real time, providing weight parameters for the flow rate ratio of the liquid fluid after the valve body is adjusted.

[0028] The working principle of a small flow regulating valve flow test device is as follows: First, the mating protrusion 11 on the small flow valve body 3 to be tested is inserted into the mating groove 12 on the cover 2. Then, the electric push rod 42 is opened and the upper main bevel gear 43 is moved upward and locked into the meshing part of the four sets of upper secondary bevel gears 44. Then, the double-head motor 41 is opened and, through the meshed upper main bevel gear 43, the threaded rods 45 on the four sets of upper secondary bevel gears 44 are rotated in the forward direction. The four threaded rods 45 drive the support arms 47 on the threaded sleeve 46 to move inward synchronously in the inclined groove 10 until the four support arms 47 drive the locking seat 48 to move inward and lock into the locking groove 49 at the valve seat of the valve body 3. After completing the positioning operation of the current small flow valve body 3, the double-head motor 41 is paused and the electric push rod 42 is closed and the upper main bevel gear 43 is moved downward and disengaged from the meshing part of the four sets of upper secondary bevel gears 44 to the initial position. Next, the first electric telescopic rod 73 is opened and the first lower auxiliary bevel gear 72 is moved inward and engaged with the lower main bevel gear 71. Then, the double-head motor 41 is reopened and the cam 76 on the first lower auxiliary bevel gear 72 is continuously rotated through the engaged lower main bevel gear 71. The cam 76 drives the piston 78 on the connecting rod 77 to reciprocate in the first piston cylinder 5. The single set of pistons 78 is controlled to perform low-power work, which is suitable for dilute liquid fluids and low-speed supply of valve body 3 within the small flow range. Based on the characteristics and power requirements of the liquid fluid, the second electric telescopic rod 75 is opened synchronously and drives the second lower auxiliary bevel gear 74 to move inward and engage with the lower main bevel gear 71. Then, the double-head motor 41 is opened and drives the cam 76 on the second lower auxiliary bevel gear 74 to rotate continuously through the engaged lower main bevel gear 71. The cam 76 drives the piston 78 on the connecting rod 77 to reciprocate in the second piston cylinder 6, controlling the double set of pistons 78 to perform high-power work. This is suitable for viscous liquid fluids and high-speed supply of valve body 3 within the small flow range. Subsequently, the piston 78 in the first piston cylinder 5 performs a single low-power operation, or simultaneously combines with the piston 78 in the second piston cylinder 6 to perform a double high-power operation. Correspondingly, through the water inlet pipe 83 on the first three-way valve 81 and the second three-way valve 82, the thin, viscous, and thick liquid fluids in the water storage chamber 18 are supplied to the valve body 3 through the three-way connector 86 on the first delivery pipe 84 and the second delivery pipe 85, and through the booster pipe 87. The valve body 3 then adjusts the supplied liquid fluids, and the flow sensor 13 detects the flow. After the flow is displayed on the display screen 14, the flow is discharged through the drain pipe 88 through the metal hose 89 to the filling pipe 94, thus completing the high and low power supply adjustment operation of liquid fluids with different characteristics. At the same time, the electric slide rail 91 is opened and, through the electric slide rail slide block 92, drives the filling pipe 94 on the connecting seat 93 to reach directly above the large measuring tank 95, the medium measuring tank 96, and the small measuring tank 97 in sequence. The liquid level sensor 98 monitors the liquid level of the liquid fluid injected into the large measuring tank 95, the medium measuring tank 96, and the small measuring tank 97, and the weighing sensor 17 weighs the liquid fluid injected into the large measuring tank 95, the medium measuring tank 96, and the small measuring tank 97. Under the specified power and time, the flow rate ratio of the liquid fluid injected into the large measuring tank 95, the medium measuring tank 96, and the small measuring tank 97 is obtained.

[0029] It should be noted that the specific models and specifications of the dual-head motor 41, electric push rod 42, first electric telescopic rod 73, second electric telescopic rod 75, first three-way valve 81, second three-way valve 82, flow sensor 13, display screen 14, electric slide rail 91, electric slide rail slide block 92, liquid level sensor 98 and weighing sensor 17 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0030] The power supply circuits for the dual-head motor 41, electric push rod 42, first electric telescopic rod 73, second electric telescopic rod 75, first three-way valve 81, second three-way valve 82, flow sensor 13, display screen 14, electric slide rail 91, electric slide rail base 92, liquid level sensor 98, and weighing sensor 17 are clear to those skilled in the art and will not be described in detail here.

[0031] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A flow rate testing device for a small flow regulating valve, comprising a housing (1), characterized in that: The box (1) is provided with a cover (2), and a valve body (3) is placed on the cover (2). A positioning component for fixing the valve body (3) is provided in the reserved cavity of the box (1) near the cover (2). The outer side of the box (1) is respectively fixed with a first piston cylinder (5) and a second piston cylinder (6), and the first piston cylinder (5) and the second piston cylinder (6) are respectively provided with a supply component and a conveying component for supplying water to the valve body (3); The outer side of the cover (2) is provided with a test component for detecting the flow of the valve body (3).

2. The flow testing device for a small flow regulating valve according to claim 1, characterized in that: The positioning assembly also includes a dual-head motor (41) embedded in the housing (1), and an electric push rod (42) is fixed on one output shaft of the dual-head motor (41) via a coupling. An upper main bevel gear (43) is fixed on the piston rod of the electric push rod (42), and an upper auxiliary bevel gear (44) is provided on the outside of the upper main bevel gear (43). A threaded rod (45) that rotates with the housing (1) is fixed on the outside of the upper auxiliary bevel gear (44).

3. The flow testing device for a small flow regulating valve according to claim 2, characterized in that: The threaded rod (45) is threaded with a threaded sleeve (46), and a support arm (47) is fixed on the threaded sleeve (46) and slides with the inclined groove (10) reserved on the cover (2). A card seat (48) is fixed on the inner side of the support arm (47), and a card groove (49) is opened on the valve seat of the valve body (3) to engage with the card seat (48). A mating protrusion (11) is fixed in the middle of the cover (2), and a mating groove (12) is opened on the valve seat of the valve body (3) to engage with the mating protrusion (11).

4. The flow testing device for a small flow regulating valve according to claim 3, characterized in that: The supply assembly includes a lower main bevel gear (71) sleeved on another output shaft of the dual-head motor (41), and a first lower auxiliary bevel gear (72) and a second lower auxiliary bevel gear (74) are respectively provided on the outer side of the lower main bevel gear (71). A first electric telescopic rod (73) and a second electric telescopic rod (75) are respectively fixed on the outer side of the first lower auxiliary bevel gear (72) and the second lower auxiliary bevel gear (74).

5. The flow testing device for a small flow regulating valve according to claim 4, characterized in that: The outer sides of the first electric telescopic rod (73) and the second electric telescopic rod (75) are both fixed with cams (76) via rotating shafts, and a spoiler frame (19) is sleeved on the rotating shaft. A connecting rod (77) is hinged on the cam (76), and a piston (78) that slides and performs work with the first piston cylinder (5) and the second piston cylinder (6) is hinged on the connecting rod (77).

6. The flow testing device for a small flow regulating valve according to claim 5, characterized in that: The conveying assembly includes a first three-way valve (81) and a second three-way valve (82) respectively connected to the first piston cylinder (5) and the second piston cylinder (6), and the inner ends of the first three-way valve (81) and the second three-way valve (82) are connected to a water inlet pipe (83). The housing (1) has a water storage chamber (18) connected to the water inlet pipe (83) and is sealed with the reserved cavity of the housing (1).

7. The flow testing device for a small flow regulating valve according to claim 6, characterized in that: The outer ends of the first three-way valve (81) and the second three-way valve (82) are respectively connected to the first delivery pipe (84) and the second delivery pipe (85), and the inner ends of the first delivery pipe (84) and the second delivery pipe (85) are connected to the three-way connector (86), and the three-way connector (86) is connected to the booster pipe (87) which is threadedly connected to the water inlet end of the valve body (3).

8. The flow testing device for a small flow regulating valve according to claim 7, characterized in that: The drain end of the valve body (3) is threadedly connected to a drain pipe (88), and the outer end of the drain pipe (88) is connected to a metal hose (89). The valve body (3) is equipped with a flow sensor (13) with a display screen (14) and a monitoring mechanism is applied to monitor the flow rate of water flowing into the valve body (3) through the booster pipe (87) and flowing out through the drain pipe (88).

9. The flow testing device for a small flow regulating valve according to claim 8, characterized in that: The test assembly includes an electric slide rail (91) placed horizontally on the outside of the cover (2), and an electric slide rail seat (92) slides on the electric slide rail (91). A connecting seat (93) is fixed on the electric slide rail seat (92), and a filling tube (94) communicating with a metal hose (89) is sleeved inside the connecting seat (93). A splash guard (15) is provided at the bottom end of the filling tube (94).

10. A flow testing device for a small flow regulating valve according to claim 9, characterized in that: The outer side of the box (1) is fixed with a support (16), and a weighing sensor (17) is embedded on the support (16). A large measuring bucket (95), a medium measuring bucket (96) and a small measuring bucket (97) are placed on the weighing sensor (17). A liquid level sensor (98) is embedded on the inner side of the large measuring bucket (95), the medium measuring bucket (96) and the small measuring bucket (97), and a liquid level gauge is set on the outer side.

Images