General purpose turbine flowmeter

Abstract

The application discloses a universal turbine flowmeter, which comprises a flowmeter shell and a measuring core assembly, the measuring core assembly comprises a core body and a vortex rod rotatably supported in the core body, the core body is provided with a main oil passage along the length direction of the vortex rod, and the two ends of the main oil passage are provided with branch oil passages communicated with the rotating supporting positions of the vortex rod; one end of the main oil passage penetrates through the tail end of the core body, and the tail end of the core body is provided with a switching plate, the switching plate is provided with a plug matched with the tail end of the main oil passage and a tail end oil injection hole capable of being opposite to the tail end of the main oil passage; the flowmeter shell is provided with an oil injector fixing portion near the middle part, the fixing portion is provided with a middle part oil injection hole, the flowmeter shell is provided with a middle part oil injection pipe communicated with the middle part oil injection hole and the main oil passage, and the position, where the middle part oil injection pipe is communicated with the main oil passage, is close to the middle part of the main oil passage. The universal turbine flowmeter can meet the assembly requirements of two oil injection modes on the market, and can meet the requirement of quick switching of one of the two oil injection modes, and has excellent adaptability to the use environment and user requirements.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of flow meters, and particularly relates to a universal turbine flow meter. BACKGROUND

[0002] The gas turbine flow meter is mainly used for measuring the flow of air, nitrogen, oxygen, hydrogen, marsh gas, natural gas, steam and other medium fluids in industrial pipelines. The turbine flow meter is almost not affected by the parameters such as fluid density, pressure, temperature and viscosity when measuring the volume flow. The main principle is to convert the gas flow rate into the rotating speed of the turbine, and then convert the rotating speed of the turbine into an electric signal proportional to the flow, and then display the corresponding flow information after the electric signal is processed by the totalizer.

[0003] In order to ensure the measurement reliability of the flow meter, the two ends of the rotating support of the turbine rotor need to be lubricated for a long time to ensure the smoothness of the rotation. The oil injection lubrication structure is an important component of the turbine flow meter, and directly affects the overall performance and structural adaptability of the flow meter.

[0004] The turbine flow meter is mainly composed of a shell and a measuring core assembly installed in the shell. In the prior art, the oil injection structure of the turbine flow meter at home and abroad is mainly divided into two ways: middle oil injection and tail oil injection. At present, the tail oil injection method is mostly used on the market. This method usually requires an internal oil pipe to be installed on the measuring core. At the same time, the main oil injector is hung on the shell, and part of the pipeline is connected to the tail end of the flow meter, resulting in more exposed oil injection pipelines. Of course, there are some middle oil injection devices, that is, a hole is directly opened through the shell at the oil injector hanging position, and then the oil is introduced into the oil channel of the measuring core through the oil pipe. This method directly avoids the exposure of the oil injection pipeline and is convenient to assemble. However, it requires slightly higher machining precision and increases the corresponding cost. Therefore, the applicant believes that the shell and the measuring core of the turbine flow meter on the market can basically only adopt one oil injection method, and users are difficult to switch according to their needs, especially when the measuring core and the flow meter shell manufacturers or national standards are different, it is more difficult to replace universally. SUMMARY

[0005] Therefore, the present application provides a universal turbine flow meter to solve the problem that the turbine flow meter can only adopt one oil injection lubrication structure in the prior art, and the user adaptability is poor.

[0006] The technical scheme is as follows:

[0007] A universal turbine flowmeter comprises a flowmeter housing and a measuring core assembly installed in the flowmeter housing, the measuring core assembly comprising a core body and a turbine rotatably supported in the core body, characterized in that the core body is provided with a main oil passage along the length direction of the turbine, and the main oil passage is provided with branch oil passages at both ends communicating with the rotating support position of the turbine.

[0008] One end of the main oil passage penetrates the tail end of the core body, and the tail end of the core body is provided with a detachable switching plate, the switching plate being provided with a plug adapted to the tail end of the main oil passage and a tail end oil injection hole capable of being in alignment with the tail end of the main oil passage.

[0009] The flowmeter housing is provided with an oil injector fixing portion near the middle portion, the oil injector fixing portion being provided with a middle portion oil injection hole, and the flowmeter housing is provided with a middle portion oil injection pipe communicating with the middle portion oil injection hole and the main oil passage, and the middle portion oil injection pipe is in communication with the middle portion of the main oil passage.

[0010] With the above scheme, the tail end oil injection hole can be communicated with the tail end of the main oil passage through the switching plate to meet the requirement of tail end oil injection mode, or the tail end oil injection hole can be disconnected and plugged and then middle portion oil injection is performed through the middle portion oil injection pipe, so that the installation requirement of the two oil injection modes can be met without making great changes to the existing flowmeter core body, and the user can select the oil injection mode according to the requirement, install the oil injector on the oil injection fixing portion, and then connect the oil outlet end of the oil injector with the tail end oil injection hole or the middle portion oil injection pipe, or even set branch lines directly at the outlet end of the oil injector and communicate with the tail end oil injection hole or the middle portion oil injection pipe, and set a switching valve at the branch line, so that the two oil injection modes can be switched more conveniently, and more application requirements can be met.

[0011] Preferably, the plug and the tail end oil injection hole are concentrically distributed, and the switching plate is connected and fixed with the tail end of the core body through the concentrically distributed connecting screws. With the above scheme, the plug can better seal the main oil passage, or the tail end oil injection hole can be in alignment with the main oil passage, so that the switching operation is facilitated, the operation difficulty is reduced, and the structure is simple and convenient for processing.

[0012] Preferably, the plug is provided with a sealing ring. With the above scheme, the sealing property of the plug can be improved.

[0013] Preferably, the middle portion oil injection pipe is arranged along the radial direction of the flowmeter housing, and the core body, the flowmeter housing and the measuring housing provided in the flowmeter housing are provided with through holes arranged in alignment with each other for the middle portion oil injection pipe to penetrate and communicate with the main oil passage. With the above scheme, the independent installation and replacement of the middle portion oil pipe are facilitated, and the overall service life is prolonged.

[0014] Preferably, the oil injector fixing portion is provided with a one-way valve.

[0015] As preferred: the front and rear ends of the vortex rod are respectively supported on the core body through bearings, the tail end of the core body is provided with a mounting hole opposite to the vortex rod, the switching plate is provided with an insertion part adapted to the mounting hole, the insertion part is provided with a insertion hole adapted to the vortex rod, the tail end of the vortex rod is sleeved with a thrust ball bearing, and the insertion part is provided with a sink groove opposite to the thrust ball bearing. By the above scheme, the overall machining and assembling difficulty is reduced, and the thrust force of the vortex rod in the axial direction towards the tail end during rotation can be converted into a rotating force through the thrust ball bearing, so that the rotation smoothness of the vortex rod is improved.

[0016] As preferred: the oil distribution channel close to the tail end of the core body penetrates between the thrust ball bearing and the adjacent bearing. By the above scheme, the thrust ball bearing and the adjacent bearing can be better lubricated at the same time, so that the rotation smoothness is ensured.

[0017] As preferred: the core body is provided with a drain hole between the thrust ball bearing and the adjacent bearing. By the above scheme, the drain operation can be performed in time through the drain hole, so that the excessive lubricating oil between the two bearings does not cause negative impact on the rotation of the vortex rod.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] The universal turbine flowmeter provided by the application can meet the assembly requirements of two oil injection modes on the market at present, and can meet the requirement of quick switching, has excellent adaptability to the use environment and user requirements, is more universal, and has good popularization and application prospect and economic value. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective view of the first embodiment of the application;

[0021] Figure 2 It is a vertical sectional view of the first embodiment of the application; Figure 1

[0022] Figure 3 It is a horizontal sectional view of the first embodiment of the application; Figure 1

[0023] Figure 4 It is an oil path schematic view in the first embodiment of the application; Figure 1

[0024] It is a schematic view of the installation and connection of the switching plate and the core body (the main oil channel and the tail end oil injection hole are in communication); Figure 5

[0025] It is a perspective view of the switching plate; Figure 6

[0026] It is a front view of the switching plate; Figure 7

[0027] Figure 8 ​​​This is a schematic diagram of the core tail structure;

[0028] Figure 9 This is a perspective view of Embodiment 2 of the present invention;

[0029] Figure 10 for Figure 9 Axonometric drawing (without the oiler);

[0030] Figure 11 for Figure 9 The oil circuit diagram of the embodiment shown;

[0031] Figure 12 for Figure 9 Sectional view;

[0032] Figure 13 This is a schematic diagram of the installation of the central oil injection pipe. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings.

[0034] refer to Figures 1 to 13 The general-purpose turbine flow meter shown mainly includes a flow meter housing 1 and a measuring core assembly 2 installed inside the flow meter housing 1. The flow meter housing 1 has an oil injector fixing part 10 near the middle, as shown in the figure. The measuring core assembly includes a core body 20 and a worm gear 21 rotatably supported inside the core body 20. The core body 20 has a main oil passage 200 arranged along the length of the worm gear 21. Both ends of the main oil passage 200 have branch oil passages 201 that connect to the rotatable support part of the worm gear 21.

[0035] refer to Figure 3 One end of the main oil passage 200 passes through the tail end of the core 20. At the same time, the tail end of the core 20 has a detachable switching plate 3. The switching plate 3 has a plug 30 adapted to the tail end of the main oil passage 200 and a tail end oil injection hole 31 that can be directly opposite the tail end of the main oil passage 200. When the tail end oil injection hole 31 is directly opposite the main oil passage 200, that is, when the oil injection line of the oil injector 8 is connected to the tail end oil injection hole 31, the tail end oil injection operation can be performed.

[0036] On the other hand, a central oil injection hole is provided on the oiler fixing part 10, and a central oil injection pipe 4 is provided inside the flow meter housing 1 to connect the central oil injection hole and the main oil passage 200. The central oil injection pipe 4 is connected to the main oil passage 200 at a position close to the middle of the main oil passage 200. In this way, when the oiler 8 is directly connected to the central oil injection hole, the central oil injection operation can be performed.

[0037] In the embodiment, the switching plate 3 is disc-shaped, the plugs 30 and the tail end oil injection holes 31 are concentrically distributed, the switching plate 3 is connected and fixed to the tail end of the core 20 through the concentrically distributed connecting screws 32, in the embodiment, the three connecting screws 32 and the plugs 30 and the tail end oil injection holes 31 are concentrically distributed, and the three connecting screws 32 are uniformly distributed, and the included angle between each two is 120°, and the included angle between the plugs 30 and the tail end oil injection holes 31 is also 120°, and the tail end of the core 20 further has a resting hole 204 matched with the plug 30, in the initial state, the plug 30 extends into the tail end of the main oil passage 200 to block it, when the tail end oil injection system needs to be configured, the switching plate 3 is removed and rotated by 120° to make the tail end oil injection hole 31 opposite to the tail end of the main oil passage 200, and the plug 30 extends into the resting hole 204, and then the core 20 is fixed and connected through the connecting screws 32.

[0038] In order to fully ensure the reliability of the plug 30, the plug 30 is sleeved with a sealing ring 33, and at the same time, the tail end of the core 20 is provided with an annular sink 205 at the position corresponding to the main oil passage 200, and the sealing ring 33 is just located in the annular sink 205 when the plug is blocked.

[0039] In the application, the middle oil injection pipe 4 is arranged along the radial direction of the flowmeter shell 1, as shown in the drawings, the core 20, the flowmeter shell 1 and the measuring shell 5 arranged in the flowmeter shell 1 have through holes arranged opposite to each other for the middle oil injection pipe 4 to pass through and communicate with the main oil passage 200, and the inner end of the through hole on the core 20 just penetrates the main oil passage 200 in the radial direction, and the through hole is processed with an internal thread, and the inner end of the middle oil injection pipe 4 is matched with the internal thread, which plays a role of end fixation and hole sealing.

[0040] When the middle oil injection mode is adopted, the one-way valve 6 is prearranged in the oil injector fixing part 10, the oil outlet of the oil injector 8 is communicated with the middle oil injection pipe 4 through the one-way valve 6 in the installation, and the installation structure is shown in Figure 9 .

[0041] Under normal circumstances, the front and rear ends of the vortex rod 21 are respectively supported on the core 20 through bearings 11, the tail end of the core 20 has a mounting hole 202 arranged opposite to the vortex rod 21 in the application, the switching plate 3 has an insertion part 34 matched with the mounting hole 202, the insertion part 34 has an insertion hole 340 matched with the vortex rod 21, the vortex rod 21 is sleeved with a thrust ball bearing 7, and the insertion part 34 has a sink 341 arranged opposite to the thrust ball bearing 7, so that the installation stability of the switching plate 3 can be improved, and on the other hand, the thrust ball bearing 7 is limited by the insertion part 34, so that the thrust effect of the thrust ball bearing 7 can be fully played.

[0042] The oil distribution channels 201 in the application are all arranged corresponding to the positions of the two bearings 11, mainly for lubricating the bearings 11, wherein the oil distribution channel 201 close to the tail end of the core 20 penetrates between the thrust ball bearing 7 and the adjacent bearing 11, so that it can simultaneously lubricate the thrust ball bearing 7.

[0043] In order to avoid the influence of the transition accumulation of lubricating oil on the rotating speed of the worm 21, the oil drain hole 203 is arranged between the thrust ball bearing 7 and the adjacent bearing 11 on the core 20 in the application, and the oil drain hole 203 can be opened for oil drain operation under necessary conditions.

[0044] Reference Figures 1 to 13 With the universal turbine flowmeter of the application, because the switching plate 3 and the middle oil injection pipe 4 are arranged, the user can configure different oil injection systems according to the needs, that is, the tail oil injection or the middle oil injection is selected, which can better adapt to the working conditions, and even the oil injection line of the oil injector 8 can be directly connected with the middle oil injection pipe 4 and the tail oil injection hole 31 on the switching plate 3 through the shunt structure, and then the switching valve is controlled, so that the convenient switching of the oil injection mode during the working process after the installation is completed can be realized.

[0045] Finally, it should be noted that the above description is only for the preferred embodiments of the application, and those skilled in the art can make various similar modifications under the inspiration of the application without departing from the purpose and claims of the application, and such modifications fall within the protection scope of the application.

Claims

1. A universal turbine flowmeter comprising a flowmeter housing (1) and a measuring spool assembly (2) mounted within the flowmeter housing (1), the measuring spool assembly comprising a spool body (20) and a turbine rotor (21) rotatably supported within the spool body (20), characterized in that: The core (20) has a main oil passage (200) arranged along the length direction of the worm (21), and the two ends of the main oil passage (200) have branch oil passages (201) communicated to the rotating support positions of the worm (21). One end of the main oil passage (200) penetrates through the tail end of the core (20), and the tail end of the core (20) has a switch plate (3) arranged in a detachable manner, the switch plate (3) has a plug (30) matched with the tail end of the main oil passage (200), and a tail end oil injection hole (31) capable of being opposite to the tail end of the main oil passage (200). The flowmeter shell (1) is provided with an oil injector fixing part (10) near the middle part, the oil injector fixing part (10) is provided with a middle oil injection hole, the flowmeter shell (1) is provided with a middle oil injection pipe (4) communicated with the middle oil injection hole and the main oil passage (200), and the middle oil injection pipe (4) is arranged near the middle part of the main oil passage (200). The plug (30) and the tail end oil injection hole (31) are concentrically arranged, and the switch plate (3) is connected and fixed with the tail end of the core (20) through the concentrically arranged connecting screws (32). The middle oil injection pipe (4) is arranged along the radial direction of the flowmeter shell (1), the core (20), the flowmeter shell (1) and the measuring shell (5) arranged in the flowmeter shell (1) are provided with through holes arranged opposite to each other for the middle oil injection pipe (4) to penetrate and communicate with the main oil passage (200).

2. The universal turbine flow meter of claim 1, wherein: The plug (30) is sleeved with a sealing ring (33).

3. The universal turbine flow meter of claim 1, wherein: The oil injector fixing part (10) is provided with a one-way valve (6).

4. The universal turbine flow meter of claim 1 or 2 or 3, wherein: The worm (21) is supported on the core (20) through bearings (11) at the front and rear ends, the tail end of the core (20) is provided with a mounting hole (202) opposite to the worm (21), the switch plate (3) has an insertion part (34) matched with the mounting hole (202), the insertion part (34) has an insertion hole (340) matched with the worm (21), the tail end of the worm (21) is sleeved with a thrust ball bearing (7), and the insertion part (34) is provided with a recess (341) opposite to the thrust ball bearing (7).

5. The universal turbine flow meter of claim 4, wherein: The branch oil passage (201) near the tail end of the core (20) penetrates between the thrust ball bearing (7) and the adjacent bearing (11).

6. The universal turbine flow meter of claim 5, wherein: The core (20) is provided with an oil leakage hole (203) between the thrust ball bearing (7) and the adjacent bearing (11).

Images