Double-waist-wheel gas roots flow meter

Abstract

The utility model discloses a double-waist-wheel gas Roots flowmeter, relates to the technical field of Roots flowmeters, and solves the problems that a rotating shaft needs to be mounted in a mounting hole of the device, lubricating oil of the device only can lubricate the rotating shaft, and waist wheels which rotate relative to each other cannot be lubricated, so that the rotating shaft cannot be lubricated. An oil storage hole of the device is also formed in a waist wheel, so that when lubricating oil is added subsequently, the whole device needs to be disassembled for adding the lubricating oil, and the device is inconvenient to use, the device comprises a flow meter main body and the waist wheel, a mounting groove is formed in the flow meter main body, and the waist wheel is symmetrically arranged on the two sides of the mounting groove; through cooperation of an oil storage tank, an oil storage groove and a connecting hole, when the device is used, lubricating oil enters the rotating shaft through the connecting hole and then enters the waist wheel through a second through hole, and the outer side wall of the waist wheel can be lubricated through a first through hole.

Description

Technical Field

[0001] The utility model relates to the technical field of Roots flowmeters, in particular to a double-lobe gas Roots flowmeter. Background Technique

[0002] The double-lobe gas Roots flowmeter is mainly a high-precision metering instrument for continuously or intermittently measuring the flow rate of gas or liquid in a pipeline. After retrieval, a patent with the authorization number of CN208953048U in China discloses a lobe of a gas Roots flowmeter, including a lobe body. An installation hole for installing a gear shaft and a gear is provided in the middle of the lobe body. An oil injection hole is provided on one side of the lobe body. The oil injection hole communicates with the installation hole. A fixing plug for closing the oil injection hole is provided on the oil injection hole. The fixing plug is in interference fit with the oil injection hole. The utility model has the following beneficial effects: The lobe of this gas Roots flowmeter can add lubricating oil during the working process to prevent the gear shaft from wearing after long-term use. However, the installation hole of this device needs to install a rotating shaft, and the lubricating oil of this device can only lubricate the rotating shaft, and the mutually rotating lobes cannot be lubricated. Moreover, the oil storage hole of this device is also provided inside the lobe, so that when adding lubricating oil subsequently, the whole device needs to be disassembled to add it, making the use of this device inconvenient. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a double-lobe gas Roots flowmeter, which solves the problems that the installation hole of the device needs to install a rotating shaft, the lubricating oil of the device can only lubricate the rotating shaft, the mutually rotating lobes cannot be lubricated, and the oil storage hole of the device is also provided inside the lobe, so that when adding lubricating oil subsequently, the whole device needs to be disassembled to add it, making the use of this device inconvenient.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: A double-lobe gas Roots flowmeter includes a flowmeter main body and lobes. An installation groove is provided inside the flowmeter main body, and the lobes are symmetrically arranged on both sides of the installation groove. A rotating shaft is fixedly installed inside the lobe, and the rotating shaft is hollow. Connecting holes are symmetrically arranged inside the side walls of the installation groove. The rotating shaft is rotatably connected inside the connecting holes. Oil storage grooves are symmetrically arranged inside the side walls on both sides of the installation groove. The oil storage grooves communicate with the connecting holes respectively. A plurality of first through holes are arranged on the end side wall and the inner side wall of the lobe. A plurality of second through holes are arranged at equal intervals inside the rotating shaft. The first through holes and the second through holes are on the same axis.

[0005] Preferably, storage oil tanks are symmetrically and fixedly installed on the top surface of the flowmeter main body. Oil injection pipes are fixedly installed on the tops of the storage oil tanks. Oil inlet pipes are symmetrically and fixedly installed on the bottoms of the storage oil tanks, and the oil inlet pipes penetrate through the side wall of the flowmeter main body to the inside of the oil storage tank, so that lubricating oil can conveniently enter the inside of the oil storage tank.

[0006] Preferably, the end of the rotating shaft is solid, so as to prevent the entered oil from leaking out.

[0007] Preferably, the rotating shaft and the connecting hole are connected through a gasket, so as to prevent the lubricating oil inside the oil storage tank from leaking out.

[0008] The utility model provides a double-lobe gas Roots flowmeter, which has the following beneficial effects:

[0009] 1. For this double-lobe gas Roots flowmeter, when using the double-lobe gas Roots flowmeter, through the cooperation among the arranged storage oil tank, oil storage tank and connecting hole, when using the device, lubricating oil can enter the inside of the rotating shaft through the connecting hole, then enter the lobe through the second through hole, and the outer side wall of the lobe can be lubricated by using the first through hole;

[0010] 2. For this double-lobe gas Roots flowmeter, when using the double-lobe gas Roots flowmeter, by installing a storage oil tank outside the flowmeter main body, the subsequent refueling work is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 is a schematic diagram of the lobe installation structure of the utility model;

[0013] Figure 3 is a schematic diagram of the oil storage tank structure of the utility model;

[0014] Figure 4 is a schematic diagram of the separated structure of the lobe and the rotating shaft of the utility model.

[0015] In the figure, 1 - flowmeter main body, 2 - storage oil tank, 3 - oil injection pipe, 4 - installation groove, 5 - lobe, 6 - connecting hole, 7 - oil storage tank, 8 - oil inlet pipe, 9 - first through hole, 10 - rotating shaft, 11 - second through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] Embodiment 1: Please refer to Figures 1-4 , the embodiment of the present utility model provides a double-lobe gas Roots flowmeter, which includes a flowmeter main body 1 and lobes 5. An installation groove 4 is provided inside the flowmeter main body 1, and the lobes 5 are symmetrically arranged on both sides of the installation groove 4. A rotating shaft 10 is fixedly installed inside the lobe 5, and the rotating shaft 10 is hollow. Connecting holes 6 are symmetrically arranged inside the side walls of the installation groove 4, and the rotating shaft 10 is rotatably connected inside the connecting holes 6. Oil storage grooves 7 are symmetrically arranged inside the side walls on both sides of the installation groove 4, and the oil storage grooves 7 are respectively communicated with the connecting holes 6. A plurality of first through holes 9 are arranged on both the end side wall and the inner side wall of the lobe 5, and a plurality of second through holes 11 are arranged at equal intervals inside the rotating shaft 10. The first through holes 9 and the second through holes 11 are on the same axis. When the flowmeter main body 1 is in use, the lubricating oil in the oil storage groove 7 enters the inside of the rotating shaft 10 through the connecting hole 6. When the rotating shaft 10 rotates, the lubricating oil inside enters the inside of the first through hole 9 through the second through hole 11, and thus moves to the outer side wall of the lobe 5 while rotating, enhancing the lubrication degree when the two lobes 5 rotate.

[0018] Embodiment 2: In this embodiment, as Figures 1-4 shown, oil storage tanks 2 are symmetrically and fixedly installed on the top surface of the flowmeter main body 1. Oil injection pipes 3 are fixedly installed on the tops of the oil storage tanks 2. Oil inlet pipes 8 are symmetrically and fixedly installed at the bottoms of the oil storage tanks 2, and the oil inlet pipes 8 all penetrate through the side wall of the flowmeter main body 1 to the inside of the oil storage groove 7. By injecting oil into the inside of the oil storage tank 2 through the oil inlet pipe 8, the injected lubricating oil can enter the inside of the oil storage groove 7. The end of the rotating shaft 10 is solid, and the rotating shaft 10 and the connecting hole 6 are connected through a gasket.

[0019] It should be noted that in this embodiment, when using the double-lobe gas Roots flowmeter, as Figures 1-4 shown, by injecting oil into the inside of the oil storage tank 2 through the oil inlet pipe 8, the injected lubricating oil can enter the inside of the oil storage groove 7. When the flowmeter main body 1 is in use, the lubricating oil in the oil storage groove 7 enters the inside of the rotating shaft 10 through the connecting hole 6. When the rotating shaft 10 rotates, the lubricating oil inside enters the inside of the first through hole 9 through the second through hole 11, and thus moves to the outer side wall of the lobe 5 while rotating, enhancing the lubrication degree when the two lobes 5 rotate.

[0020] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0021] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A double-wheel gas Roots flowmeter, characterized in that: The flow meter comprises a flow meter body (1) and a waist wheel (5), wherein a mounting groove (4) is arranged inside the flow meter body (1), and the waist wheels (5) are symmetrically arranged on both sides of the mounting groove (4), a rotating shaft (10) is fixedly arranged inside the waist wheel (5), and the rotating shaft (10) is hollow, a connecting hole (6) is symmetrically arranged inside the side wall of the mounting groove (4), and the rotating shaft (10) is rotatably connected to the inside of the connecting hole (6), oil storage grooves (7) are symmetrically arranged inside the side walls of both sides of the mounting groove (4), and the oil storage grooves (7) are respectively connected to the connecting holes (6), a plurality of first through holes (9) are arranged on the end side wall and the inner side wall of the waist wheel (5), and a plurality of second through holes (11) are arranged on the inside of the rotating shaft (10) at equal intervals, and the first through holes (9) and the second through holes (11) are both located on the same axis.

2. A double-rotor gas Roots flowmeter according to claim 1, characterized in that: An oil storage tank (2) is symmetrically fixedly mounted on the top surface of the flow meter body (1), an oil filling pipe (3) is fixedly mounted on the top of the oil storage tank (2), and an oil inlet pipe (8) is symmetrically fixedly mounted on the bottom of the oil storage tank (2), and the oil inlet pipe (8) passes through the side wall of the flow meter body (1) to the inside of the oil storage tank (7).

3. A double-rotor gas Roots flowmeter according to claim 1, characterized in that: The end of the rotating shaft (10) is solid.

4. A double-rotor gas Roots flowmeter according to claim 1, characterized in that: The rotating shaft (10) and the connecting hole (6) are connected via a sealing gasket.

Images