High-vacuum flow testing device of energy-saving pump

Abstract

The invention provides a high vacuum flow testing device for an energy-saving pump, and the device comprises a vacuum testing cover, a vacuum pressure gauge, a thermal gas mass flowmeter, a gas inlet pipe, an operation watching mechanism, and a locking mechanism which is used for assisting the position movement of the operation watching mechanism and the fixation after the movement. The bottom end of the vacuum testing cover is provided with a special-shaped connector, the bottom end of the special-shaped connector is provided with an air inlet seat, and the side surface of the top end of the vacuum testing cover is fixedly sleeved with a first limiting ring and a second limiting ring which are arranged in parallel. Sealing rings are arranged at a plurality of key connecting parts of the device, and clean and standard sealing surface treatment is matched, so that external gas leakage interference can be effectively avoided, the stability of a vacuum environment is ensured, the test precision is improved, and the data reliability is guaranteed; the prompt area visually displays operation steps and matters needing attention, and operators can conveniently look up the operation steps and matters at any time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy-saving pump, and is a high-vacuum flow testing device of energy-saving pump. BACKGROUND

[0002] The energy-saving pump is a fluid conveying device adopting high-efficiency energy-saving technology, and is used in the fields of water supply system, industrial process water, cleaning system, high-pressure flushing, fire-fighting system, cooling system, boiler feed water and condensing system, machine tool matching, heating ventilation air conditioning, ultrafiltration system, reverse osmosis system, distillation system, swimming pool, etc.

[0003] In the prior art, the high-vacuum flow testing device of the existing energy-saving pump has strict assembly requirements before testing, workers need to remember the assembly matters and assist the assembly by holding the instruction manual, which increases the working intensity of the workers, reduces the assembly efficiency, and is prone to assembly errors, thereby increasing the subsequent high-vacuum flow testing error. SUMMARY

[0004] The present application provides a high-vacuum flow testing device of energy-saving pump to solve the technical problem that the high-vacuum flow testing device has strict assembly requirements before testing, workers need to remember the assembly matters and assist the assembly by holding the instruction manual, which increases the working intensity of the workers, reduces the assembly efficiency, and is prone to assembly errors, thereby increasing the subsequent high-vacuum flow testing error.

[0005] The present application solves the above technical problems by the following technical solutions: The present application provides a high-vacuum flow testing device of energy-saving pump, which comprises: A vacuum testing cover, wherein a special-shaped joint is installed at the bottom end of the vacuum testing cover, an air inlet seat is installed at the bottom end of the special-shaped joint, and two first limiting rings and second limiting rings placed in parallel are fixedly sleeved on the side surface of the top end of the vacuum testing cover; A vacuum pressure gauge, wherein the vacuum pressure gauge is communicated with the vacuum testing cover, and is used for pressure measurement; A thermal gas mass flowmeter, wherein the thermal gas mass flowmeter is communicated with the rear side of the vacuum testing cover, and is used for measuring gas flow; An air inlet pipe, wherein the air inlet pipe is communicated with the right side of the vacuum testing cover, a measuring orifice plate for measuring the suction capacity of the pump is arranged at the top end of the air inlet pipe, and the measuring orifice plate is fixedly connected with the air inlet end of the air inlet pipe through a fixing clamp; The operation viewing unit is detachably hung on the surfaces of the first limiting ring and the second limiting ring, and is used for assisting the user to visually show the operation steps and matters needing attention and to check at any time.

[0006] Further, an O-shaped sealing ring for assisting the sealing of the connection is arranged at the connection between the top end of the special-shaped joint and the vacuum test cover, and a sealing ring is arranged at the connection between the bottom end of the special-shaped joint and the air inlet seat.

[0007] Further, a valve communication pipe is fixedly communicated with the left side of the vacuum test cover, the outer end of the valve communication pipe is communicated with an angle valve, and the top end of the angle valve is fixedly communicated with a vacuum pressure gauge.

[0008] Further, an air inlet communication pipe is fixedly communicated with the right side of the vacuum test cover, the air inlet communication pipe is connected with a vacuum ball valve through a clamp, the top end of the vacuum ball valve is communicated with an air inlet pipe, and sealing rings are arranged at the communication positions of the vacuum ball valve with the air inlet pipe and the air inlet communication pipe.

[0009] Further, a visual observation window is arranged on the front side of the vacuum test cover, a flowmeter communication pipe is fixedly communicated with the rear side of the vacuum test cover, the end of the flowmeter communication pipe is connected with a thermal gas mass flowmeter, a sealing ring is arranged at the connection between the end of the flowmeter communication pipe and the thermal gas mass flowmeter, a connecting flange is connected with the end of the thermal gas mass flowmeter, and a flange blind plate is detachably arranged on the end of the connecting flange through a clamp.

[0010] Further, the operation viewing unit comprises an operation viewing mechanism and a locking mechanism, the operation viewing mechanism is detachably hung on the surfaces of the first limiting ring and the second limiting ring, and the locking mechanism is arranged at the bottom end of the operation viewing mechanism and is used for assisting the position movement and fixation of the operation viewing mechanism after the movement. The operation viewing mechanism comprises a viewing plate, a prompt area, a hanging seat and a sliding column, the hanging seat is fixedly connected with the side surface of the viewing plate facing the vacuum test cover, the front side of the viewing plate corresponding to the hanging seat is provided with a prompt area of the operation method steps and matters needing attention in the assembly process of workers, the bottom end of the hanging seat is fixedly connected with the sliding column, the hanging seat is placed on the top side of the first limiting ring and the second limiting ring, and the sliding column is slidably arranged in the inner cavity of the top side of the first limiting ring and the second limiting ring. The locking mechanism comprises a mounting seat, a connecting seat, a handle, a locking column, a locking spring, a limiting seat and a fixing head, the mounting seat is fixedly arranged on the bottom side surface of the viewing plate through bolts, the connecting seat is attached to the bottom side of the mounting seat, the handle is fixedly connected with the bottom side of the connecting seat, the locking column is fixedly connected with the top side of the connecting seat, the limiting seat is fixedly connected with the top end of the locking column, the fixing head is fixedly connected with the top end of the locking column, the limiting seat is fixedly connected with the side surface of the viewing plate, and the locking spring is sleeved with the surface of the locking column. The surface of the mounting base is fixedly connected to the bottom surface of the viewing panel by mounting bolts. The surface of the mounting base is slidably connected to two parallel locking pins, and the ends of the locking pins slide through the surface of the mounting base. Furthermore, the bottom end of the locking spring is fixedly connected to the top surface of the mounting base, and the top end of the locking spring is fixedly connected to the bottom side of the limiting base.

[0011] Furthermore, the fixing head engages with a corresponding fixing hole on the bottom side of the second limiting ring, and the number of fixing holes is several, which are distributed in a ring on the bottom side surface of the second limiting ring.

[0012] Furthermore, the operation viewing unit includes an observation mechanism and a fixing part. The observation mechanism is used to adjust the viewing according to the user's needs and to adjust the corresponding items to assist in the installation. The fixing part is used to assist in fixing the observation mechanism. The observation mechanism includes an observation shell, an observation window, a rotating assembly, a drive belt, a prompting belt, a slide bar, and a hanging post. A slide bar is fixedly installed on the rear side of the observation shell, and a hanging post that can be hung on the surface of the first limiting ring and the second limiting ring is fixedly installed on the bottom side of the slide bar. An observation window is fixedly installed on the front side of the observation shell, and a rotating assembly is installed on the bottom side of the observation shell. A drive belt is installed on the surface of the rotating assembly, and a prompting belt for assisting in the installation precautions and steps of the side-viewing device is detachably provided on the surface of the drive belt. The rotating assembly includes a drive shaft, a drive roller, a first gear, a second gear, a driven shaft, and a driven roller. The drive shaft is installed on the bottom side of the observation shell, and the drive roller is sleeved on the surface of the drive shaft. The first gear is installed at the bottom end of the drive shaft, and the second gear is meshed with one side of the first gear. The second gear is installed on the bottom side of the observation shell, and the drive roller is connected to the driven roller via a drive belt. The fixing part includes a fixing frame, a handle, a fixing column, a fixing spring, and a fixing platform. The fixing frame is fixedly connected to the bottom side surface of the observation shell. The fixing column passes through the surface of the fixing frame. The handle is fixedly connected to the bottom end of the fixing column. The top end of the fixing column can be engaged with the fixing hole on the bottom side of the second limiting ring. The fixing platform is sleeved on the surface of the fixing column. The fixing platform is elastically connected to the fixing frame through the fixing spring sleeved on the surface of the fixing column.

[0013] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0014] The positive and progressive effects of this invention are as follows: The aforementioned high vacuum flow rate testing device for an energy-saving pump allows for quick fixing or adjustment of the viewing unit's position via the engagement of the viewing unit with the corresponding fixing hole of the second limiting ring. This adapts to different operational viewing angles and facilitates the installation of various components in their respective testable vacuum chamber positions. The device's prompt area displays operating steps and precautions, assisting operators in standardized operation and addressing the issues of memorizing assembly instructions and relying on manuals for assembly, which increases workload and reduces efficiency. It also improves the sealing of vacuum chamber connections, reducing subsequent high vacuum flow rate testing errors. Multiple key connection points are equipped with sealing rings, and with clean and standardized sealing surface treatment, external gas leakage interference is effectively prevented, ensuring a stable vacuum environment, improving testing accuracy, and guaranteeing data reliability. The viewing mechanism can be flexibly mounted on the first and second limiting rings via a mounting base and sliding column. The prompt area intuitively displays operating steps and precautions, allowing operators to easily refer to them and reducing errors caused by forgotten procedures. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application.

[0016] Figure 1 This is a three-dimensional structural diagram of the high vacuum flow rate testing device of the present invention.

[0017] Figure 2 This is a schematic diagram of the rear three-dimensional structure of the high vacuum flow rate testing device of the present invention.

[0018] Figure 3 This is a schematic diagram of the rear bottom of the high vacuum flow testing device of the present invention, viewed from below.

[0019] Figure 4 This is a top view of the high vacuum flow rate testing device of the present invention.

[0020] Figure 5 The high vacuum flow rate testing device of the present invention Figure 4 Schematic diagram of the structure in cross section AA.

[0021] Figure 6 The high vacuum flow rate testing device of the present invention Figure 4 Schematic diagram of the cross-sectional structure along the middle BB.

[0022] Figure 7 This is a schematic diagram of the bottom surface structure of the operation viewing mechanism of the high vacuum flow testing device of the present invention.

[0023] Figure 8This is a schematic diagram of the rear connection structure of the operation viewing mechanism of the high vacuum flow testing device of the present invention.

[0024] Figure 9 This is a bottom-view structural diagram of the operation viewing mechanism of the high vacuum flow testing device of the present invention.

[0025] Figure 10 The high vacuum flow rate testing device of the present invention Figure 9 A magnified schematic diagram of the structure at point A in the middle.

[0026] Figure 11 This is a schematic diagram of the observation mechanism structure of the high vacuum flow rate testing device of the present invention.

[0027] Figure 12 This is a schematic diagram of the rear structure of the observation mechanism of the high vacuum flow rate testing device of the present invention.

[0028] Figure 13 The high vacuum flow rate testing device of the present invention Figure 12 A magnified schematic diagram of the structure at point B in the middle.

[0029] Figure 14 This is a schematic diagram of the front and side cross-sectional structure of the observation shell of the high vacuum flow testing device of the present invention.

[0030] Figure 15 This is a top-view cross-sectional view of the observation shell of the high vacuum flow testing device of the present invention.

[0031] Explanation of reference numerals in the attached figures 1. Vacuum test chamber; 101. Inlet connecting pipe; 102. Valve connecting pipe; 103. Flow meter connecting pipe; 2. Non-standard connectors; 3. Air intake seat; 4. Angle valve; 5. Vacuum pressure gauge; 6. Visual observation window; 7. Vacuum ball valve; 8. Air intake pipe; 9. Measuring orifice plate; 10. Fixing clamps; 11. Thermal gas mass flow meter; 12. Connecting flange; 13. Flange blind plate; 14. First limiting ring; 15. Second limiting ring; 1501. Fixing hole; 16. Operating viewing mechanism; 1601. Viewing panel; 1602. Information area; 1603. Hanging base; 1604. Sliding column; 17. Locking mechanism; 1701. Mounting base; 1702. Connecting base; 1703. Handle; 1704. Locking pin; 1705. Locking spring; 1706. Limiting seat; 1707. Fixing head; 18. Observation mechanism; 1801. Observation shell; 1802. Observation window; 1803. Rotating assembly; 18031. Drive shaft; 18032. Drive roller; 18033. First gear; 18034. Second gear; 18035. Driven shaft; 18036. Driven roller; 1804. Drive belt; 1805. Indicator belt; 1806. Slide bar; 1807. Hanging column; 19. Fixing part; 1901. Fixing frame; 1902. Hand lever; 1903. Fixing column; 1904. Fixing spring; 1905. Fixing platform. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0034] Example 1: As Figures 1-15 As shown, a high vacuum flow rate testing device for an energy-saving pump includes: a vacuum test chamber 1, a vacuum pressure gauge 5, a thermal gas mass flow meter 11, an inlet pipe 8, an operation and viewing mechanism 16, and a locking mechanism 17 for assisting the position movement of the operation and viewing mechanism 16 and fixing it after movement. A special-shaped connector 2 is installed at the bottom of the vacuum test chamber 1, and an inlet seat 3 is installed at the bottom of the special-shaped connector 2. Two parallel first limiting rings 14 and second limiting rings 15 are fixedly sleeved on the top side surface of the vacuum test chamber 1. The vacuum pressure gauge 5 is connected to the vacuum test chamber 1. For pressure measurement, a thermal gas mass flow meter 11 is connected to the rear side of the vacuum test chamber 1. The thermal gas mass flow meter 11 is used to measure gas flow. An inlet pipe 8 is connected to the right side of the vacuum test chamber 1. A measuring orifice plate 9 for measuring the pump's suction capacity is provided at the top of the inlet pipe 8. The measuring orifice plate 9 is fixedly connected to the inlet end of the inlet pipe 8 by a fixing clamp 10. The operation viewing unit is detachably hung on the surface of the first limiting ring 14 and the second limiting ring 15. The operation viewing unit is used to assist the user in intuitively displaying the operation steps and precautions and for easy reference at any time.

[0035] In this embodiment, sealing rings are provided at many key connection points of the device (such as the connection between the vacuum test hood 1 and the special-shaped connector 2 and the air inlet seat 3, and the connection between the air inlet pipe 8 and the vacuum ball valve 7, etc.). With the clean and standardized sealing surface treatment, external gas leakage interference can be effectively avoided, ensuring a stable vacuum environment, improving test accuracy, and ensuring data reliability. The operation viewing mechanism 16 can be flexibly installed on the first limit ring 14 and the second limit ring 15 through the hanging seat 1603 and the sliding column 1604. The prompt area 1602 intuitively displays the operation steps and precautions, which is convenient for operators to refer to at any time and reduce errors caused by forgetting the process. By locking the fixed head 1707 on the locking mechanism 17 and engaging with the corresponding fixed hole 1501 of the second limit ring 15, the position of the viewing mechanism can be quickly fixed or adjusted to adapt to different operating angle requirements. The angle valve 4 can cut off the connection between the vacuum pressure sensor and the outside world before the pump is turned off, ensuring that the sensor always maintains a vacuum state and extending its service life.

[0036] The measuring orifice plate 9 is a KF50 type (calibrated according to the pump model) and is fixed by a fixing clamp 10. Its preset flow rate value (Nm³ / h) is a key parameter for calculating the pumping capacity. Combined with atmospheric pressure (b) and suction pressure (p1), it is required to be recalibrated every 8 years. Combined with the real-time monitoring of the thermal gas mass flow meter 11, data such as suction flow rate (SN) and actual gas flow rate under atmospheric conditions can be accurately obtained. The pumping capacity calculated by the formula Seff=SN×b / p1 is closer to the actual performance of the pump, providing a reliable basis for equipment evaluation.

[0037] refer to Figures 1-3 As shown, an O-ring is provided at the connection between the top of the irregular connector 2 and the vacuum test cover 1 to assist in sealing the connection, and a sealing ring is installed at the connection between the bottom of the irregular connector 2 and the air inlet seat 3.

[0038] In use, the vacuum test chamber 1 serves as the core test cavity and is connected to the air inlet seat 3 via the special-shaped connector 2. The O-ring and sealing ring at the connection ensure the cavity is sealed. At the same time, the connections between the vacuum test chamber 1 and the valve connecting pipe 102, the air inlet connecting pipe 101, and the flow meter connecting pipe 103 are all sealed with sealing rings to prevent external gas leakage from affecting the vacuum environment and to provide a stable closed space for pressure and flow measurement.

[0039] In this embodiment, such as Figure 5As shown, a valve connecting pipe 102 is fixedly connected to the left side of the vacuum test chamber 1. The outer end of the valve connecting pipe 102 is connected to an angle valve 4. The top of the angle valve 4 is fixedly connected to a vacuum pressure gauge 5. The angle valve 4 is only opened when the pump is running, which can protect the pressure gauge from always being in a vacuum state (the angle valve 4 must be closed before shutting down the pump). It is used to measure the pump's suction pressure and final pressure. The angle valve 4 can cut off the connection between the vacuum pressure sensor and the outside world before the pump is shut down, ensuring that the sensor always maintains a vacuum state and extending its service life.

[0040] like Figure 6 As shown, an air inlet pipe 101 is fixedly connected through the right side of the vacuum test hood 1. The air inlet pipe 101 is connected to the vacuum ball valve 7 by a clamp. The top of the vacuum ball valve 7 is connected to the air inlet pipe 8. Sealing rings are provided at the connection points between the vacuum ball valve 7 and the air inlet pipe 8 and the air inlet pipe 101 for sealing.

[0041] For details, please refer to Figure 1 As shown, a visual observation window 6 is installed on the front side of the vacuum test chamber 1, and a flow meter connecting pipe 103 is fixedly connected to the rear side of the vacuum test chamber 1. The end of the flow meter connecting pipe 103 is connected to a thermal gas mass flow meter 11. A sealing ring is installed at the connection between the end of the flow meter connecting pipe 103 and the thermal gas mass flow meter 11. The thermal gas mass flow meter 11 is used to monitor the gas flow rate during the test process. A connecting flange 12 is connected to the end of the thermal gas mass flow meter 11. A flange blind plate 13 is detachably installed at the end of the connecting flange 12 by means of a clamp.

[0042] During use, the air inlet pipe 8 is detachably connected to the vacuum ball valve 7, flow meter and connecting pipe, etc., by clamps, making the installation, disassembly and replacement of parts more convenient. It is easy to quickly adjust the configuration for the testing needs of different pump models. The visual observation window 6 of the vacuum test hood 1 makes it easy to observe the internal test status in real time, ensuring the accuracy of the installation and testing process.

[0043] like Figure 1 and Figures 7-10As shown, the operation viewing unit includes an operation viewing mechanism 16 and a locking mechanism 17. The operation viewing mechanism 16 is detachably hung on the surfaces of the first limiting ring 14 and the second limiting ring 15. The locking mechanism 17 is installed at the bottom of the operation viewing mechanism 16 and is used to assist the position movement of the operation viewing mechanism 16 and fix it after movement. The operation viewing mechanism 16 includes a viewing plate 1601, a prompting area 1602, a hanging seat 1603, and a sliding column 1604. The hanging seat 1603 is fixedly connected to the side of the viewing plate 1601 facing the vacuum test cover 1. The front side of the viewing plate 1601 is provided with a prompting area 1602 for the operation method steps and precautions of the workers during the assembly process. The sliding column 1604 is fixedly connected to the bottom of the hanging seat 1603. The hanging seat 1603 is placed on the top side of the first limiting ring 14 and the second limiting ring 15. The sliding column 1604 can slide in the inner cavity of the top side of the first limiting ring 14 and the second limiting ring 15.

[0044] In use, the operation and viewing mechanism 16 is hung on the top side of the first limiting ring 14 and the second limiting ring 15 via the corresponding mounting base 1603. The sliding column 1604, which is fixedly connected to the bottom side of the mounting base 1603, is placed in the limiting groove on the top side of the corresponding first limiting ring 14 and the second limiting ring 15. The sliding column 1604 can slide circumferentially along the limiting groove, and its position is fixed in conjunction with the locking mechanism 17. This facilitates the adjustment of the position of the operation and viewing mechanism 16, making it easier for operators to install each component in the corresponding testable vacuum chamber. Its prompt area 1602 can display the operation steps and precautions, assisting operators in standardized operation, solving the problem of operators having to memorize assembly precautions and hold the instruction manual for assisted assembly, which increases the workload of operators and reduces assembly efficiency. It also improves the sealing of the connection of the vacuum test chamber 1 and reduces the error of subsequent high vacuum flow test.

[0045] Preferred, such as Figure 1 and Figures 7-9 As shown, the locking mechanism 17 includes a mounting base 1701, a connecting base 1702, a handle 1703, a locking pin 1704, a locking spring 1705, a limiting seat 1706, and a fixing head 1707. The mounting base 1701 is fixedly mounted on the bottom surface of the viewing panel 1601 by bolts. The connecting base 1702 is attached to the bottom side of the mounting base 1701. The handle 1703 is fixedly connected to the bottom side of the connecting base 1702. The locking pin 1704 is fixedly connected to the top side of the connecting base 1702. The limiting seat 1706 is fixedly connected to the top of the locking pin 1704. The fixing head 1707 is fixedly connected to the top of the locking pin 1704. The limiting seat 1706 is fixedly connected to the side surface of the viewing panel 1601. The locking spring 1705 is sleeved on the surface of the locking pin 1704.

[0046] During use, the handle 1703 drives the locking pin 1704, which is fixedly connected, to slide through the connecting seat 1702. The locking pin 1704 compresses the locking spring 1705, and at the same time, the fixing head 1707 disengages from the fixing hole 1501 on the bottom side of the second limiting ring 15. Then, the operation and viewing mechanism 16 slides on the first limiting ring 14 and the second limiting ring 15, which facilitates the adjustment of the position of the operation and viewing mechanism 16 according to the assembler's position. When the handle 1703 is released, the locking spring 1705 pushes the fixing head 1707 to engage in the corresponding fixing hole 1501, thereby fixing the position of the operation and viewing mechanism 16 for convenient use.

[0047] The surface of the mounting base 1701 is fixedly connected to the bottom surface of the viewing panel 1601 by mounting bolts. Two parallel locking pins are slidably connected to the surface of the mounting base 1701, and the ends of the locking pins 1704 slide through the surface of the mounting base 1701.

[0048] The bottom end of the locking spring 1705 is fixedly connected to the top surface of the mounting base 1701, and the top end of the locking spring 1705 is fixedly connected to the bottom side of the limiting base 1706.

[0049] The fixing head 1707 engages with the corresponding fixing hole 1501 opened on the bottom side of the second limiting ring 15. There are several fixing holes 1501, and the several fixing holes 1501 are distributed in a ring on the bottom side surface of the second limiting ring 15.

[0050] Example 2: Refer to as follows Figures 11-15 As shown, the operation viewing unit includes an observation mechanism 18 and a fixing part 19. The observation mechanism 18 is used to adjust the viewing according to the user's needs and adjust the corresponding items to assist in the installation. The fixing part 19 is used to assist in fixing the observation mechanism 18. The observation mechanism 18 includes an observation shell 1801, an observation window 1802, a rotating assembly 1803, a drive belt 1804, a prompting belt 1805, a slide bar 1806, and a hanging post 1807. The slide bar 1806 is fixedly installed on the rear side of the observation shell 1801. The hanging post 1807, which can be hung on the surface of the first limiting ring 14 and the second limiting ring 15, is fixedly installed on the bottom side of the slide bar 1806. The observation window 1802 is fixedly installed on the front side of the observation shell 1801. The rotating assembly 1803 is installed on the bottom side of the observation shell 1801. The drive belt 1804 is installed on the surface of the rotating assembly 1803. The prompting belt 1805, which is used to assist in the installation of the side-viewing device, is detachably provided on the surface of the drive belt 1804. The slide bar 1806 on the rear side of the observation shell 1801 provides guidance for lateral adjustment. The hanging post 1807 on the bottom side can be directly hung on the surface of the first limiting ring 14 and the second limiting ring 15 to achieve the initial suspension and positioning of the observation mechanism 18. The rotating assembly 1803 includes a drive shaft 18031, a drive roller 18032, a first gear 18033, a second gear 18034, a driven shaft 18035, and a driven roller 18036. The drive shaft 18031 is mounted on the bottom side of the observation shell 1801. The drive roller 18032 is sleeved on the surface of the drive shaft 18031. The first gear 18033 is mounted on the bottom end of the drive shaft 18031. The second gear 18034 is meshed with one side of the first gear 18033. The second gear 18034 is mounted on the bottom side of the observation shell 1801. The drive roller 18032 is connected to the driven roller 18036 through a drive belt 1804. The fixing part 19 includes a fixing frame 1901, a handle 1902, a fixing post 1903, a fixing spring 1904, and a fixing platform 1905. The fixing frame 1901 is fixedly connected to the bottom side surface of the observation shell 1801. The fixing post 1903 passes through the surface of the fixing frame 1901. The handle 1902 is fixedly connected to the bottom end of the fixing post 1903. The top end of the fixing post 1903 can be engaged with the fixing hole 1501 on the bottom side of the second limiting ring 15. The fixing platform 1905 is sleeved on the surface of the fixing post 1903. The fixing platform 1905 is elastically connected to the fixing frame 1901 through the fixing spring 1904 sleeved on the surface of the fixing post 1903.

[0051] In use, the bottom hanging post 1807 can be directly hung on the surface of the first limiting ring 14 and the second limiting ring 15 to achieve the initial suspension and positioning of the observation mechanism 18. By pulling the fixing post 1903 down with the lever 1902, the top of the fixing post 1903 disengages from the fixing hole 1501. The fixing post 1903 drives the fixing platform to compress the fixing spring 1904. Then, after dragging the observation window 1802 of the observation mechanism 18 to the corresponding position for the user to view, the lever 1902 is released, and the fixing spring 1904 pushes the fixing platform to lock the fixing post 1903. The observation mechanism 18 is fixed in the fixing hole 1501. The first gear 18033 is driven to rotate by the second gear 18034. The first gear 18033 drives the drive shaft 18031 to rotate. The drive shaft 18031 drives the drive belt 1804 to rotate through the drive roller 18032. This facilitates the drive belt 1804 to drive the indicator belt 1805 to rotate, making it easy to adjust the position of the indicator belt 1805 corresponding to the observation window 1802, which is convenient for workers to watch. The rotating indicator belt 1805 makes it easier to watch the indicators in different parts and improves the viewing range.

[0052] The specific steps are as follows: I. Preparation Stage Component inspection and cleaning Check the prompt area 1602 of the operation viewing mechanism 16 to understand the operation steps and precautions; Check all seals (O-rings, joint seals) for damage, and clean the sealing surfaces (such as the connection between the special-shaped connector 2 and the vacuum test chamber 1, the connection between the air inlet seat 3 and the special-shaped connector 2, etc.) with solvent and lint-free cloth. Check that the measuring orifice plate 9 (KF50) is intact, that the orifice is free of dirt or damage, confirm its calibration date (calibration is required every 8 years in Itzerho), and that it matches the model of the pump to be tested; Operation viewing mechanism 16 installation The mounting base 1603 of the operation and viewing mechanism 16 is placed on the top side of the first limiting ring 14 and the second limiting ring 15. The sliding column 1604 is embedded in the inner cavity of the limiting ring and slides along the ring to a position that is easy to observe. After the user is installed in the vacuum test chamber 1, the operation and viewing mechanism 16 is adjusted to be placed in the corresponding position of the vacuum test chamber 1 and the user, so as to facilitate the worker to assemble and view, and to improve the assembly accuracy. Loosen the handle 1703 of the locking mechanism 17, compress the locking spring 1705, and make the fixing head 1707 snap into the corresponding fixing hole 1501 on the bottom side of the second limit ring 15, thus completing the fixing of the operation viewing mechanism 16.

[0053] II. Equipment Installation Phase During pipeline connection, the measuring orifice plate 9 is installed at the air inlet end of the air inlet pipe 8 through the fixing clamp 10 to ensure a seal; connect the air inlet pipe 8 to the vacuum ball valve 7 (through the clamp), and connect the other end of the vacuum ball valve 7 to the air inlet connecting pipe 101, and confirm that the sealing ring at the connection is intact; Close the angle valve 4 and the vacuum ball valve 7, connect the vacuum pressure gauge 5 to the angle valve 4 through the valve connecting pipe 102, and connect the thermal gas mass flow meter 11 to the vacuum test hood 1 through the flow meter connecting pipe 103. Seal the end with the flange blind plate 13 (fixed with clamp).

[0054] Vacuum test cover 1 installation: Remove the protective cover on the bottom shaped connector 2 of vacuum test cover 1, install it on the pump suction flange, fix it with clamps and tighten it in a cross manner to ensure that the sealing surfaces fit tightly. Connect the measuring display cable to the vacuum pressure gauge 5 (p1 sensor) and secure it with bolts. Handle the sensor gently to avoid impacts or twisting the cable.

[0055] III. Testing Phase Pump Start-up and Preheating Start the pump and wait until it reaches its maximum speed. Then slowly open the angle valve 4 (to protect the pressure gauge) so that the vacuum pressure gauge 5 can start measuring. Keep the pump running and heating until the final pressure stabilizes. Observe the internal status through the visual observation window 6. If the specific final pressure corresponding to the pump model is not reached (refer to the equipment rating), check whether the vacuum test hood 1 is leaking (such as loose seals, loose connections, etc.).

[0056] Data Measurement and Calculation Once the final pressure stabilizes and reaches the rated value, record the current measured value (final pressure) to the measurement record. Open vacuum ball valve 7 (inlet pipe 8 hand valve), wait for the pressure to stabilize, and then record the pump's suction pressure (p1). Read the suction flow rate (SN) and current atmospheric pressure (b) marked on the measuring orifice plate 9, calculate the effective suction capacity according to the formula Seff=SN×b / p1, and compare it with the equipment rating.

[0057] IV. Final Stage Equipment shutdown Close vacuum ball valve 7 (inlet pipe 8 hand valve), close angle valve 4 (protect vacuum pressure gauge 5); Stop the pump, disconnect the pressure gauge cable, and gently place the sensor. Disassembly and Protection Disassemble the vacuum test cover 1 and cover all sealing surfaces and measuring orifice plate 9 with a protective cover; Loosen the handle 1703 of the locking mechanism 17, remove the operation and viewing mechanism 16, clean it and store it; Check that all components are intact. Key components such as the measuring orifice plate 9 and pressure sensor need to be protected separately to avoid collisions or dirt.

[0058] The precautions for section 1602 are as follows: All sealing surfaces and seals must be kept clean throughout the process to avoid scratches or contamination; The pressure sensor and measuring orifice plate 9 must be handled with care and must not be thrown or impacted. The connecting cable must not be twisted. Calibrate the vacuum pressure gauge 5 and the measuring orifice plate 9 regularly (the orifice plate should be calibrated every 8 years). If any leaks or abnormalities are found during operation, stop the test immediately and check the seals and connections.

[0059] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0060] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A high vacuum flow rate testing device for an energy-saving pump, characterized in that, The high vacuum flow rate testing device for the energy-saving pump includes: Vacuum test hood (1), the bottom end of the vacuum test hood (1) is equipped with a special-shaped connector (2), the bottom end of the special-shaped connector (2) is equipped with an air inlet seat (3), and two parallel first limiting rings (14) and second limiting rings (15) are fixedly sleeved on the top side surface of the vacuum test hood (1). Vacuum pressure gauge (5), which is connected to vacuum test chamber (1), is used for pressure measurement; A thermal gas mass flow meter (11) is connected to the rear side of the vacuum test chamber (1) and is used to measure gas flow rate. An air inlet pipe (8) is connected to the right side of the vacuum test hood (1). The top end of the air inlet pipe (8) is provided with a measuring orifice plate (9) for measuring the pumping capacity. The measuring orifice plate (9) is fixedly connected to the air inlet end of the air inlet pipe (8) by a fixing clamp (10). The operation viewing unit is detachably mounted on the surfaces of the first limiting ring (14) and the second limiting ring (15); the operation viewing unit is used to assist the user in intuitively displaying the operation steps and precautions and to check them at any time.

2. The high vacuum flow rate testing device for energy-saving pumps as described in claim 1, characterized in that: The top of the irregular connector (2) is provided with an O-ring for auxiliary sealing at the connection between the top of the connector and the vacuum test cover (1), and a sealing ring is installed at the bottom of the connector (2) and the air inlet seat (3).

3. The high vacuum flow rate testing device for energy-saving pumps as described in claim 1, characterized in that: The left side of the vacuum test hood (1) is fixedly connected to a valve connecting pipe (102), the outer end of the valve connecting pipe (102) is connected to an angle valve (4), and the top of the angle valve (4) is fixedly connected to a vacuum pressure gauge (5).

4. The high vacuum flow rate testing device for energy-saving pumps as described in claim 1, characterized in that: The right side of the vacuum test hood (1) is connected to an air inlet pipe (101). The air inlet pipe (101) is connected to the vacuum ball valve (7) by a clamp. The top of the vacuum ball valve (7) is connected to the air inlet pipe (8). A sealing ring is provided at the connection between the vacuum ball valve (7), the air inlet pipe (8), and the air inlet pipe (101).

5. The high vacuum flow rate testing device for energy-saving pumps as described in claim 1, characterized in that: The vacuum test hood (1) is equipped with a visual observation window (6) on the front side. The vacuum test hood (1) is fixedly connected to a flow meter connecting pipe (103) on the rear side. The end of the flow meter connecting pipe (103) is connected to a thermal gas mass flow meter (11). A sealing ring is installed at the connection between the end of the flow meter connecting pipe (103) and the thermal gas mass flow meter (11). The end of the thermal gas mass flow meter (11) is connected to a connecting flange (12). The end of the connecting flange (12) is detachably installed with a flange blind plate (13) by a clamp.

6. The high vacuum flow rate testing device for energy-saving pumps as described in claim 1, characterized in that: The operation and viewing unit includes an operation and viewing mechanism (16) and a locking mechanism (17). The operation and viewing mechanism (16) is detachably hung on the surface of the first limiting ring (14) and the second limiting ring (15). The locking mechanism (17) is installed at the bottom of the operation and viewing mechanism (16). The locking mechanism (17) is used to assist the operation and viewing mechanism (16) in moving and fixing after moving. The operation viewing mechanism (16) includes a viewing board (1601), a prompt area (1602), a hanging seat (1603), and a sliding column (1604). The viewing board (1601) is fixedly connected to the hanging seat (1603) on one side of the surface facing the vacuum test cover (1). The front side of the viewing board (1601) is provided with a prompt area (1602) indicating the operation method steps and precautions for workers during the assembly process. The bottom end of the hanging seat (1603) is fixedly connected to the sliding column (1604). The hanging seat (1603) is placed on the top side of the first limiting ring (14) and the second limiting ring (15). The sliding column (1604) can slide in the inner cavity of the top side of the first limiting ring (14) and the second limiting ring (15). The locking mechanism (17) includes a mounting base (1701), a connecting base (1702), a handle (1703), a locking pin (1704), a locking spring (1705), a limiting seat (1706), and a fixing head (1707). The mounting base (1701) is fixedly mounted on the bottom surface of the viewing panel (1601) by bolts. The connecting base (1702) is attached to the bottom side of the mounting base (1701). A handle (1703) is fixedly connected to the side of the connecting seat (1702), a locking pin (1704) is fixedly connected to the top side of the connecting seat (1702), a limiting seat (1706) is fixedly connected to the top of the locking pin (1704), a fixing head (1707) is fixedly connected to the top of the locking pin (1704), the limiting seat (1706) is fixedly connected to the side surface of the viewing panel (1601), and a locking spring (1705) is sleeved on the surface of the locking pin (1704).

7. The high vacuum flow rate testing device for energy-saving pumps as described in claim 6, characterized in that: The surface of the mounting base (1701) is fixedly connected to the bottom surface of the viewing panel (1601) by mounting bolts. The surface of the mounting base (1701) has two parallel locking pins that slide through the surface of the mounting base (1701). The end of the locking pin (1704) slides through the surface of the mounting base (1701).

8. The high vacuum flow rate testing device for energy-saving pumps as described in claim 6, characterized in that: The bottom end of the locking spring (1705) is fixedly connected to the top surface of the mounting base (1701), and the top end of the locking spring (1705) is fixedly connected to the bottom side of the limiting base (1706).

9. The high vacuum flow rate testing device for energy-saving pumps as described in claim 6, characterized in that: The fixing head (1707) engages with the corresponding fixing hole (1501) on the bottom side of the second limiting ring (15). The number of fixing holes (1501) is several, and the several fixing holes (1501) are distributed in a ring on the bottom surface of the second limiting ring (15).

10. The high vacuum flow rate testing device for the energy-saving pump as described in claim 1, characterized in that: The operation viewing unit includes an observation mechanism (18) and a fixing part (19). The observation mechanism (18) is used to adjust the viewing according to the user's needs and adjust the corresponding items to assist in the installation. The fixing part (19) is used to assist the observation mechanism (18) in being fixed. The observation mechanism (18) includes an observation shell (1801), an observation window (1802), a rotating assembly (1803), a drive belt (1804), a prompting belt (1805), a slide bar (1806), and a hanging post (1807). The slide bar (1806) is fixedly installed on the rear side of the observation shell (1801). The hanging post (1807) that can be hung on the surface of the first limiting ring (14) and the second limiting ring (15) is fixedly installed on the bottom side of the slide bar (1806). The observation window (1802) is fixedly installed on the front side of the observation shell (1801). The rotating assembly (1803) is installed on the bottom side of the observation shell (1801). The drive belt (1804) is installed on the surface of the rotating assembly (1803). The prompting belt (1805) for assisting in the installation of the side-viewing device is detachably provided on the surface of the drive belt (1804). The rotating assembly (1803) includes a drive shaft (18031), a drive roller (18032), a first gear (18033), a second gear (18034), a driven shaft (18035), and a driven roller (18036). The drive shaft (18031) is mounted on the bottom side of the observation shell (1801). The drive roller (18032) is sleeved on the surface of the drive shaft (18031). The first gear (18033) is mounted on the bottom end of the drive shaft (18031). The second gear (18034) is meshed with one side of the first gear (18033). The second gear (18034) is mounted on the bottom side of the observation shell (1801). The drive roller (18032) is connected to the driven roller (18036) through a drive belt (1804). The fixing part (19) includes a fixing frame (1901), a handle (1902), a fixing column (1903), a fixing spring (1904), and a fixing platform (1905). The fixing frame (1901) is fixedly connected to the bottom side surface of the observation shell (1801). The fixing column (1903) passes through the surface of the fixing frame (1901). The handle (1902) is fixedly connected to the bottom end of the fixing column (1903). The top end of the fixing column (1903) can be engaged with the fixing hole (1501) on the bottom side of the second limiting ring (15). The fixing platform (1905) is sleeved on the surface of the fixing column (1903). The fixing platform (1905) is elastically connected to the fixing frame (1901) through the fixing spring (1904) sleeved on the surface of the fixing column (1903).

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