Air quantity adjusting and pressure measuring device of dry vacuum pump

Abstract

The invention relates to the technical field of vacuum pumps, in particular to a dry vacuum pump air quantity adjusting and pressure measuring device which comprises a device base, an air inlet pipeline is fixedly connected to the inner side surface of the device base, an inner shell is fixedly connected to the inner side surface of the device base, and a top shell is fixedly connected to the top surface of the device base. The inner side surface of the top shell is fixedly connected with a mounting cylinder, the inner side surface of the top shell is provided with a conical channel of which the inner diameter size is adjusted through height, the inner side surface of the inner shell is provided with a quantitative pipeline of which the height is adjusted according to flow, and the inner side surface of the top shell is provided with a connecting mechanism for controlling the lifting and detection range; the effects of flow range self-adaptive adjustment and reading datum dynamic calibration are achieved, the size of the conical channel can be adjusted according to different air volumes, when vacuum pumps in different ranges are measured, repeated replacement is not needed any more, the detection requirement of the multi-stage vacuum pump can be met through one set of device, and the detection efficiency is improved. And the working efficiency of detection personnel is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vacuum pump pressure measurement, in particular to a dry vacuum pump regulating air volume pressure measurement device. BACKGROUND

[0002] The dry vacuum pump is known for its oil-free and contact-free operation, and does not require lubrication in the cavity to avoid oil pollution, and is the first choice for high-purity processes in semiconductors, pharmaceuticals, and food. Common claw, screw, and scroll structures compress and exhaust air through synchronous meshing rotors, and the ultimate vacuum can reach 0.1 Pa. Its corrosion-resistant coating and air-cooled design enable stable operation in dust-containing and condensable vapor conditions, and maintenance only requires periodic replacement of bearings and seals, significantly reducing operating costs.

[0003] The glass rotor flowmeter is a common measuring instrument that cooperates with a conical tube and a central float to obtain corresponding values by detecting the height of the float when the gas flows through.

[0004] The existing equipment can usually only cover a fixed flow range, and when different specifications of vacuum pumps are encountered, the corresponding range of instruments must be manually replaced, which is cumbersome, time-consuming, and labor-intensive.

[0005] In view of this, a dry vacuum pump regulating air volume pressure measurement device is proposed. SUMMARY

[0006] The purpose of the present application is to provide a dry vacuum pump regulating air volume pressure measurement device to solve the problem of limited measurement range of the same size conical tube in the existing regulating air volume pressure measurement device in the background art. To achieve the above purpose, the present application provides the following technical scheme: a dry vacuum pump regulating air volume pressure measurement device, comprising a device base, an air inlet pipeline is fixedly connected to the inner surface of the device base, an inner shell is fixedly connected to the inner surface of the device base, a top shell is fixedly connected to the top surface of the device base, an installation cylinder is fixedly connected to the inner surface of the top shell, a conical channel is arranged on the inner surface of the top shell, a quantitative pipeline is arranged on the inner surface of the inner shell, and a connecting mechanism is arranged on the inner surface of the top shell.

[0007] Preferably, the conical channel comprises a conical unit, the conical unit is slidably connected to the inner surface of the installation cylinder, the outer surface of the conical unit is fixedly connected with a window plate, two side mounting frames are fixedly connected to the two sides of the conical unit, a connecting arm is fixedly connected to the bottom surface of the two side mounting frames, a lifting hook is fixedly connected to the outer surface of the connecting arm, an embedding groove is formed in the outer surface of the two side mounting frames, and a limiting rod is fixedly connected to the inner surface of the installation cylinder.

[0008] Preferably, the number of the conical units is five, the size of the five conical units increases from inside to outside, the outer surface of the conical unit is cylindrical, the inner surface of the conical unit is provided with a conical groove, the number of the two side mounting frames is five, the size of the two side mounting frames and the embedded groove decreases from bottom to top, the connecting arm is in sliding connection with the inner surface of the embedded groove, the lifting hook is in contact with the bottom surface of the two side mounting frames, the limiting rod penetrates through the two side mounting frames and is in sliding connection with the inner wall of the two side mounting frames, the two side mounting frames are in sliding connection with the inner surface of the mounting cylinder, three grooves are provided on the mounting cylinder and are aligned with the two side mounting frames and the window plate.

[0009] Preferably, the quantitative pipeline comprises an inner air channel, the inner air channel is fixedly connected with the top surface of the air inlet pipeline, the inner surface of the innermost conical unit is fixedly connected with an inner mounting seat, the top surface of the inner mounting seat is provided with an air outlet channel, the inner surface of the inner mounting seat is in sliding connection with a lifting column, the outer surface of the lifting column is in sliding connection with a floating rotor, the inner surface of the lifting column is in sliding connection with a telescopic pipe, the bottom surface of the telescopic pipe is fixedly connected with an air charging hose, the inner surface of the inner air channel is in sliding connection with a movable seat, the top surface of the movable seat is fixedly connected with a driven rack, the outer surface of the driven rack is in meshing connection with a driving gear, the outer surface of the driving gear is fixedly connected with a driving motor, and the outer surface of the movable seat is fixedly connected with a limiting baffle.

[0010] Preferably, the inner air channel is fixedly connected with the bottom surface of the innermost conical unit, the lifting column penetrates to the inner surface of the inner air channel, the top surface of the telescopic pipe is fixedly connected with the top surface of the lifting column, the driving motor is fixedly connected with the outer surface of the inner shell, the limiting baffle is in contact with the outer surface of the inner air channel, and the air charging hose is fixedly connected with the inner surface of the movable seat.

[0011] Preferably, the connecting mechanism comprises a top support, the top support is fixedly connected with the top surface of the mounting cylinder, the top surface of the mounting cylinder is fixedly connected with symmetrically distributed side supports, the outer surface of the two sides of the top support and the side supports are rotatably connected with fixed pulleys, the outer surface of the fixed pulleys is sleeved with a traction rope, one end of the traction rope is fixedly connected with an inner fixed plate, the outer surface of the top shell is in sliding connection with a scale, and the outer surface of the device base is fixedly connected with an outer frame.

[0012] Preferably, the number of the traction ropes is two, the two ends of the traction ropes are respectively fixedly connected with the lifting column and the inner fixed plate, the inner fixed plate is fixedly connected with the inner surface of the outermost conical unit, the scale is fixedly connected with the inner fixed plate close to the window plate side, the scale penetrates through the outer frame and the device base and is in sliding connection with the inner surfaces of the outer frame and the device base.

[0013] Compared with the prior art, the present application has the following beneficial effects: In the present application, by matching the taper unit with the quantitative pipeline, the effects of self-adaptive adjustment of flow range and dynamic calibration of reading reference are realized, so that when the vacuum pump is detected, the size of the taper channel can be adjusted according to different gas amounts, and when different range vacuum pumps are measured, it is no longer necessary to change back and forth, so that one set of device can cover the detection needs of multi-stage vacuum pumps, greatly improving the work efficiency of the detection personnel.

[0014] In the present application, by matching the connecting mechanism with the quantitative pipeline, the effect that the rotor always floats in the same visible area is realized, so that when the vacuum pump is detected, the floating rotor 331 is always in the same range, making reading more convenient, preventing the large change of the height of the floating rotor due to the large change of the vacuum pump flow before and after adjustment, avoiding the difficulty in reading caused by the sharp change of the flow, and significantly improving the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic view of the overall structure of the present application from the side; Figure 2 It is a schematic view of the internal structure of the overall structure of the present application A; Figure 3 It is a schematic view of the internal structure of the overall structure of the present application B; Figure 4 It is a schematic view of the mutual cooperation structure of the components of the taper channel of the present application; Figure 5 It is a schematic view of the mutual cooperation structure of the two side mounting racks, connecting arms and embedded grooves of the present application; Figure 6 It is a schematic view of the mutual cooperation structure of the connecting mechanism of the present application; Figure 5 It is an enlarged view of A in the present application; Figure 7 It is a schematic view of the mutual cooperation structure of the taper units of the present application; Figure 8 It is a schematic view of the mutual cooperation structure of the components of the quantitative pipeline of the present application; Figure 9 It is a schematic view of the internal structure of the quantitative pipeline of the present application; Figure 10 It is a schematic view of the mutual cooperation structure of the lifting column and the telescopic pipe of the present application; Figure 11 It is a schematic view of the mutual cooperation structure of the inner air duct and the movable seat of the present application; Figure 12 It is a schematic view of the mutual cooperation structure of the movable seat and the inflatable hose of the present application; Figure 13 It is a schematic view of the mutual cooperation structure of the components of the connecting mechanism of the present application; Figure 14 For the application Figure 13 Amplified view at B in the middle; Figure 15 For the application of the taper unit and the internal fixation plate structure schematic diagram; Figure 16 For the application of the connecting mechanism and the lifting column structure schematic diagram; Figure 17 For the application of the lifting column and the taper unit structure schematic diagram; Figure 18 For the application of the internal structure of the taper unit section view; Figure 19 For the application of the scale, the outer frame and the device base structure schematic diagram.

[0016] In the figure: 1, device base; 11, air inlet pipeline; 12, inner shell; 13, top shell; 131, mounting cylinder; 2, tapered channel; 21, taper unit; 211, window plate; 22, both sides of the mounting frame; 221, connecting arm; 2211, pull hook; 222, embedded slot; 23, limit rod; 3, quantitative pipeline; 31, inner airway; 32, inner mounting seat; 321, air outlet channel; 33, lifting column; 331, floating rotor; 34, telescopic pipe; 341, inflatable hose; 35, movable seat; 351, driven rack; 3511, driving gear; 3512, driving motor; 352, limit baffle; 4, connecting mechanism; 41, top support; 411, side support; 42, fixed pulley; 421, traction rope; 43, internal fixation plate; 431, scale; 432, outer frame. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application.

[0018] Please refer to Figures 1 to 19 The application provides a technical solution: a dry vacuum pump gas amount adjusting pressure measuring device, which comprises a device base 1, an air inlet pipeline 11 fixedly connected to the inner side surface of the device base 1, an inner shell 12 fixedly connected to the inner side surface of the device base 1, a top shell 13 fixedly connected to the top surface of the device base 1, a mounting cylinder 131 fixedly connected to the inner side surface of the top shell 13, a tapered channel 2 arranged on the inner side surface of the top shell 13, a quantitative pipeline 3 arranged on the inner side surface of the inner shell 12, and a connecting mechanism 4 arranged on the inner side surface of the top shell 13.

[0019] The device base 1, the inner shell 12 and the top shell 13 are used for mounting and protecting the internal structure, the air inlet pipe 11 is used for connecting with the pump to be detected for inputting inwardly, the mounting cylinder 131 is used for mounting the tapered channel 2 on the quantitative pipe 3, and three grooves are arranged on the surface for observing the interior and limiting the movement path of the tapered channel 2.

[0020] The tapered channel 2 comprises tapered units 21, the inner side surface of the mounting cylinder 131 is in sliding connection with the tapered units 21, the outer side surface of the tapered units 21 is fixedly connected with a window plate 211, both sides of the tapered units 21 are fixedly connected with two side mounting frames 22, the bottom surface of the two side mounting frames 22 is fixedly connected with a connecting arm 221, the outer side surface of the connecting arm 221 is fixedly connected with a lifting hook 2211, the outer side surface of the two side mounting frames 22 is provided with an embedded groove 222, and the inner side surface of the mounting cylinder 131 is fixedly connected with a limiting rod 23.

[0021] The number of the tapered units 21 is five, and the sizes of the five tapered units 21 increase in sequence from inside to outside, the outer side surface of the tapered units 21 is a cylinder, and the inner side surface is provided with a tapered groove, the number of the two side mounting frames 22 is five, and the sizes of the two side mounting frames 22 and the embedded groove 222 decrease in sequence from bottom to top, the inner side surface of the connecting arm 221 and the embedded groove 222 is in sliding connection, the bottom surface of the two side mounting frames 22 is in contact with the lifting hook 2211, the limiting rod 23 penetrates through the two side mounting frames 22 and is in sliding connection with the inner wall of the two side mounting frames 22, the inner side surface of the two side mounting frames 22 is in sliding connection with the mounting cylinder 131, and three grooves are arranged on the mounting cylinder 131 and are aligned with the two side mounting frames 22 and the window plate 211.

[0022] Through the setting of the tapered channel 2, the height of the tapered units 21 is adjusted to control the size of the bottom section opening to adjust the detection range, in the process of use, the outer sides of the five tapered units 21 are cylinders, the radial sizes decrease in sequence from outside to inside and are nested with each other, the inner diameter of each tapered unit 21 is consistent with the outer diameter of the tapered unit 21 at the inner joint to ensure the sealing property of the joint, since the outer side of the tapered unit 21 is a cylinder, the tapered units 21 can move up and down, and the inner side of the tapered unit 21 is tapered to form a tapered pipe required for testing. Each conical unit 21 is sleeved on the limiting rod 23 through two side mounting frames 22 to limit the path during lifting, and the sequence during lifting follows from outside to inside, that is, the outside is lifted first to drive the next conical unit 21 inside to be lifted, and each two side mounting frame 22 is inserted into the embedding groove 222 of the next two side mounting frame 22 through the connecting arm 221, when the connecting arm 221 is lifted, the connecting arm 221 will first be lifted in the embedding groove 222 and will not be in contact with the two side mounting frames 22 inside, so that the conical unit 21 will not be lifted, until the lifting hook 2211 on the connecting arm 221 is in contact with the bottom of the two side mounting frames 22, at this time, the connecting arm 221 will hook the two side mounting frames 22 and lift them, realizing the process of lifting from outside to inside in sequence. Since the size of the conical unit 21 increases from inside to outside in sequence, the position of the limiting rod 23 is unchanged, and the two side mounting frames 22 are mounted between the limiting rod 23 and the conical unit 21, so that the size of the two side mounting frames 22 decreases from inside to outside in sequence, the size of the embedding groove 222 increases from bottom to top in sequence, and the position of the connecting arm 221 is arranged outward from bottom to top in sequence, so that the two side mounting frames 22 will not block each other when they are stacked together, and will pass through the embedding groove 222 in sequence at the same time.

[0023] The quantitative pipeline 3 comprises an inner air channel 31 fixedly connected with the top surface of the air inlet pipeline 11, the inner side surface of the innermost conical unit 21 in the conical unit 21 is fixedly connected with an inner mounting seat 32, the top surface of the inner mounting seat 32 is provided with an air outlet passage 321, the inner side surface of the inner mounting seat 32 is slidably connected with a lifting column 33, the outer side surface of the lifting column 33 is slidably connected with a floating rotor 331, the inner side surface of the lifting column 33 is slidably connected with a telescopic pipe 34, the bottom surface of the telescopic pipe 34 is fixedly connected with an inflation hose 341, the inner side surface of the inner air channel 31 is slidably connected with a movable seat 35, the top surface of the movable seat 35 is fixedly connected with a driven rack 351, the outer side surface of the driven rack 351 is engaged with a driving gear 3511, the outer side surface of the driving gear 3511 is fixedly connected with a driving motor 3512, and the outer side surface of the movable seat 35 is fixedly connected with a limiting baffle 352.

[0024] The inner air channel 31 is fixedly connected with the bottom surface of the innermost conical unit 21, the lifting column 33 penetrates to the inner side surface of the inner air channel 31, the top surface of the telescopic pipe 34 is fixedly connected with the top surface of the lifting column 33, the driving motor 3512 is fixedly connected with the outer side surface of the inner shell 12, the limiting baffle 352 is in contact with the outer side surface of the inner air channel 31, and the inflation hose 341 is fixedly connected with the inner side surface of the movable seat 35.

[0025] By setting the quantitative pipeline 3, the pump is rated according to the input amount per unit time, and the size of the tapered channel 2 is adjusted. In use, the inner air channel 31 is connected with the air inlet pipeline 11, the input airflow enters the inner air channel 31 through the air inlet pipeline 11, passes through the tapered unit 21 at the top of the inner air channel 31, and is output from the air outlet channel 321 into the tapered channel 2 which gradually expands from the bottom to the top. The floating rotor 331 moves freely along the center line of the tube. The measured airflow flows into the tapered tube from the lower end. The gas will impact the floating rotor 331 and generate a force on the rotor, and blow the floating rotor 331 up to rise on the surface of the lifting column 33. After the measured airflow flows through the floating rotor 331 and the tapered channel 2, it flows out from the upper end. When the measured fluid flows to the floating rotor 331, the floating rotor 331 is in a balanced state and maintains a certain height. The position height of the floating rotor 331 in the tapered tube has a corresponding relationship with the flow rate, and the airflow velocity is obtained according to the initial cross-sectional size of the current tapered channel 2. In this way, the position height of the rotor in the tapered tube can be observed. In the process of gas flow, the position with greater flow rate has smaller static pressure, and the position with smaller flow rate has greater static pressure. Therefore, the gas pressure value can be calculated by observing the position height. In use, the inflatable hose 341 is first in the center position of the inner air channel 31. After the vacuum pump is connected, the input airflow inflates the telescopic tube 34 and stops after a certain time. According to the different gas flow rates input by the vacuum pump, the telescopic tube 34 has different lengths after inflation, and the lifting column 33 is lifted. At this time, the driving motor 3512 is started to drive the driving gear 3511 to rotate, and the driven rack 351 and the movable seat 35 are pushed outward. The movable seat 35 clamps and blocks the middle section of the inflatable hose 341. At this time, the air in the telescopic tube 34 is restricted inside and cannot overflow. At the same time, since the inflatable hose 341 is blocked, the subsequent gas cannot enter to continue inflating the telescopic tube 34. According to the length of the telescopic tube 34 extended during this inflation, the vacuum pump is initially classified. The limiting baffle 352 is used to limit the movement range of the movable seat 35, so that when it reaches the limit, the inflatable hose 341 is first in the center position of the inner air channel 31.

[0026] The connecting mechanism 4 comprises a top support 41 fixedly connected with the top surface of the mounting cylinder 131. The top surface of the mounting cylinder 131 is fixedly connected with symmetrically distributed side supports 411. The outer side surfaces of the two sides of the top support 41 and the side supports 411 are rotatably connected with fixed pulleys 42. The outer side surfaces of the fixed pulleys 42 are sleeved with traction ropes 421. One end of the traction ropes 421 is fixedly connected with an inner fixed plate 43. The outer side surface of the top outer shell 13 is slidably connected with a scale 431. The outer side surface of the device base 1 is fixedly connected with an outer frame 432.

[0027] There are two traction ropes 421, each of which is fixedly connected to the lifting column 33 and the inner fixing plate 43 at both ends. The inner fixing plate 43 is fixedly connected to the inner surface of the outermost tapered unit 21. The scale 431 is fixedly connected to the inner fixing plate 43 on the side near the window plate 211. The scale 431 passes through the outer frame 432 and the device base 1 and is slidably connected to the outer frame 432 and the inner surface of the device base 1. By setting the connecting mechanism 4, the height and size of the conical channel 2 are adjusted according to the height of the lifting column 33, and the height is inversely proportional. During use, fixed pulleys 42 are installed on the top bracket 41 and the side bracket 411 to reduce the friction of the traction rope 421, and keep the part of the traction rope 421 connecting the lifting column 33 and the inner fixed plate 43 vertical, so that when one side descends, the other side rises, and vice versa. When the lifting column 33 is in a high position, it means that the air flow of the vacuum pump is large at this time, causing the outermost conical unit 21 to descend, and vice versa. At the same time, since only the lifting and lowering of the outermost conical unit 21 is directly linearly related to the height of the lifting column 33, the scale 431 is connected to it and follows the lifting and lowering, and the lifting range of the floating rotor 331 is always inside the outer frame 432.

[0028] Assume that the vacuum pump flow rate is high, the lifting column 33 is at a high position, and only the outermost conical unit 21 is pulled up by the lifting column 33, while the remaining conical units 21 are at the bottom. The outermost conical unit 21 has the largest inner diameter. When the airflow is output from the outlet channel 321 to the conical channel 2, the flow rate remains unchanged. The larger the cross-sectional area, the lower the flow rate. The floating rotor 331 rises within the confines of the outer frame 432.

[0029] During subsequent testing, the vacuum pump flow rate is reduced, and the height of the lifting column 33 is gradually lowered. The outermost conical unit 21 is then raised to a higher height, and the inner conical unit 21 is lifted up. This increases the overall height of the conical channel 2, while the cross-sectional area at the bottom decreases. Although the flow rate decreases, the cross-sectional area also decreases, resulting in a small change in flow rate. The floating rotor 331 still rises within the confines of the outer frame 432. Since the lower conical unit 21 is lifted only after reaching the maximum distance, the inner conical areas of the upper conical unit 21 must be aligned, and only the lower portion below the air outlet channel 321 may be misaligned to ensure the smoothness of the inner wall of the test area. In this way, when testing the vacuum pump, the size of the tapered channel 2 can be adjusted according to the different gas volumes. When measuring vacuum pumps in different ranges, there is no need to change back and forth, which greatly improves the work efficiency of the testers. The scale 431 is marked with the air pressure corresponding to the height of the floating rotor 331. The scale increases from bottom to top. Since the scale 431 moves with the outermost tapered unit 21, the size of the vacuum pump flow affects the height of the lifting column 33, and in turn affects the height of the scale 431. When the air flow is the smallest, the scale 431 is at the highest position. Based on the smallest value of the scale on the scale 431, the air pressure is obtained according to the height when the floating rotor 331 rises. When the vacuum pump flow increases, the scale 431 will decrease, and the lower small scale will be submerged in the device base 1. At this time, the new reference is the position where the scale is aligned with the device base 1. The floating rotor 331 still rises within the range of the outer frame 432. Since the reference is changed, the read value is also changed. For example, in the initial state, the scale 431 is at the highest position, and the bottom zero scale is aligned with the device base 1. The floating rotor 331 rises by five units, and the read value is five. When the scale 431 decreases, the ten scale is aligned with the device base 1. The floating rotor 331 still rises by five units, but the read value is fifteen. In this way, when the vacuum pump is detected, the floating rotor 331 is always within the same range, making reading more convenient. It prevents the large change in the height of the floating rotor 331 caused by the large change in the vacuum pump flow before and after adjustment, which affects reading.

[0030] In this embodiment, as shown in Figure 1 , Figure 2 , Figure 3 , the device base 1, the inner housing 12 and the top outer shell 13 are used to install and protect the internal structure. In this embodiment, as shown in Figure 4 , Figure 5 , Figure 6 , the tapered channel 2 is composed of a plurality of interconnected tapered units 21. In this embodiment, as shown in Figure 7 , the tapered unit 21 changes the bottom cross-sectional size by changing the height. In this embodiment, as shown in Figure 8 , Figure 9 , Figure 10 , the extension of the inflated flexible tube 34 drives the lifting column 33 to rise to different heights. In this embodiment, as shown in Figure 11 , Figure 12 , the inflatable hose 341 controls the switch through the clamping of the movable seat 35. In this embodiment, as shown in Figure 13 , Figure 14 , Figure 15 , Figure 16 , the lifting column 33 is connected with the tapered unit 21 through the traction rope 421 to realize lifting linkage. In this embodiment, as shown inFigure 17 As shown, the height of the lifting column 33 is inversely proportional to the height of the conical unit 21, that is, the greater the flow rate, the larger the initial cross-section; In this embodiment, Figure 18 As shown, the inner conical areas of the upper conical units 21 are necessarily aligned, and only the lower portion below the air outlet channel 321 is misaligned to ensure a smooth inner wall of the test area. Furthermore, since the outer side of the conical units 21 is cylindrical, no gap will appear during the lifting process. In this embodiment, Figure 19 As shown, the scale 431 will drop, and the small scale below will sink into the device base 1. At this time, the position where the scale and the device base 1 are aligned is used as the new reference.

[0031] The use method and advantages of the present invention: The dry vacuum pump regulating gas volume pressure measuring device has the following working process: like Figures 1 to 19 As shown, when in use, the air inlet pipe 11 is connected to the pump to be tested and inputs air inward. The inflation hose 341 is first located at the center of the inner airway 31. After the vacuum pump is connected, air is input to inflate the telescopic tube 34 and the air is stopped after a certain period of time. According to the different air flow rates input by the vacuum pump, the telescopic tube 34 is extended to different sizes after inflation, and the lifting column 33 is lifted to different heights. The height of the outermost tapered unit 21 is adjusted according to the height of the lifting column 33, and the inner tapered unit 21 is lifted in turn, thereby changing the height and inner diameter of the entire tapered channel 2. When the outermost tapered unit 21 is lifted or lowered, the scale 431 is driven to rise or fall synchronously, thereby changing the reference position. The driving motor 3512 drives the driving gear 3511 to push the driven rack 351 and the movable seat 35 outward. The movable seat 35 blocks the middle section of the inflation hose 341. The air in the telescopic tube 34 is trapped inside and cannot escape. No air can be input, and the length is locked. The input airflow enters the inner air channel 31 through the air inlet pipe 11, passes through the conical unit 21 at the top of the inner air channel 31, and is output from the air outlet channel 321 to the conical channel 2 that gradually expands from bottom to top. The gas will impact the floating rotor 331 and generate a force on the rotor, blowing the floating rotor 331 up. The air pressure value is obtained by observing the position height of the rotor in the conical tube.

[0032] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and such changes and improvements are all within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A dry vacuum pump gas flow regulating and pressure measuring device, comprising a device base (1), an air inlet pipe (11) being fixedly connected to the inner surface of the device base (1), an inner shell (12) being fixedly connected to the inner surface of the device base (1), a top shell (13) being fixedly connected to the top surface of the device base (1), and a mounting cylinder (131) being fixedly connected to the inner surface of the top shell (13), characterized in that: The inner surface of the top shell (13) is provided with a tapered channel (2) whose inner diameter is adjusted by height, the inner surface of the inner shell (12) is provided with a quantitative pipe (3) whose height is adjusted according to the flow rate per unit time, and the inner surface of the top shell (13) is provided with a connecting mechanism (4) for controlling the lifting and detection range.

2. The dry vacuum pump gas volume regulating and pressure measuring device according to claim 1, characterized in that: The conical channel (2) comprises a conical unit (21), the conical unit (21) is slidably connected to the inner surface of the mounting cylinder (131), and the outer surface of the conical unit (21) is fixedly connected to a window plate (211).

3. The dry vacuum pump gas volume regulating and pressure measuring device according to claim 2, characterized in that: The number of the conical units (21) is five, and the sizes of the five conical units (21) increase from the inside to the outside. The outer surface of the conical unit (21) is cylindrical, and the inner surface is provided with a conical groove.

4. The dry vacuum pump gas volume regulating and pressure measuring device according to claim 3, characterized in that: Two side mounting frames (22) are fixedly connected to both sides of the conical unit (21), the bottom surfaces of the two side mounting frames (22) are fixedly connected to connecting arms (221), and the outer surfaces of the two side mounting frames (22) are provided with embedding grooves (222).

5. The dry vacuum pump gas volume regulating and pressure measuring device according to claim 4, characterized in that: The quantitative pipe (3) includes an inner air duct (31), the inner air duct (31) is fixedly connected to the top surface of the air inlet pipe (11), the inner surface of the innermost conical unit (21) in the conical units (21) is fixedly connected to an inner mounting seat (32), the top surface of the inner mounting seat (32) is provided with an air outlet channel (321), the inner surface of the inner mounting seat (32) is slidably connected to a lifting column (33), the outer surface of the lifting column (33) is slidably connected to a floating rotor (331), the inner surface of the lifting column (33) is slidably connected to a telescopic tube (34), and the bottom surface of the telescopic tube (34) is fixedly connected to an inflation hose (341).

6. The dry vacuum pump gas volume regulating and pressure measuring device according to claim 5, characterized in that: The inner surface of the inner airway (31) is slidably connected to a movable seat (35), the top surface of the movable seat (35) is fixedly connected to a driven rack (351), and the outer surface of the driven rack (351) is meshed with a driving gear (3511).

7. The dry vacuum pump gas volume regulating and pressure measuring device according to claim 6, characterized in that: The inner air channel (31) is fixedly connected to the bottom surface of the innermost conical unit (21), and the inflation hose (341) is fixedly connected to the inner surface of the movable seat (35).

8. The dry vacuum pump gas volume regulating and pressure measuring device according to claim 7, characterized in that: The connecting mechanism (4) includes a top bracket (41), the top bracket (41) is fixedly connected to the top surface of the mounting cylinder (131), the top surface of the mounting cylinder (131) is fixedly connected to symmetrically distributed side brackets (411), both sides of the top bracket (41) and the outer surfaces of the side brackets (411) are rotatably connected to fixed pulleys (42), and the outer surfaces of the fixed pulleys (42) are sleeved with traction ropes (421).

9. The dry vacuum pump gas volume regulating and pressure measuring device according to claim 8, characterized in that: One end of the traction rope (421) is fixedly connected to an inner fixing plate (43), the outer surface of the top shell (13) is slidably connected to a scale (431), and the outer surface of the device base (1) is fixedly connected to an outer frame (432).

10. The dry vacuum pump gas volume regulating and pressure measuring device according to claim 9, characterized in that: The two ends of the traction rope (421) are fixedly connected to the lifting column (33) and the inner fixing plate (43), respectively. The scale (431) is fixedly connected to the inner fixing plate (43) on the side close to the window plate (211). The inner fixing plate (43) is fixedly connected to the outermost conical unit (21).

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