CN210774271U

CN210774271U - High-frequency calibration device for mechanical Roots flowmeter

Info

Publication number: CN210774271U
Application number: CN201921641294.0U
Authority: CN
Inventors: 郑庆煊; 秦卫良; 谢用文
Original assignee: Fujian Had Instrument Co ltd
Current assignee: Fujian Had Instrument Co ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-06-16
Anticipated expiration: 2029-09-29

Abstract

The utility model relates to a flowmeter equipment field discloses a high frequency calibration device for mechanical type roots flowmeter, it includes casing and front end housing, install first waist shaft and second waist shaft in the casing, the end fixing of first waist shaft and second waist shaft has synchronous gear set, first synchronous gear is connected with first waist shaft, second synchronous gear is connected with second waist shaft, the tip of first waist shaft still is fixed with the driving gear, the end connection of second waist shaft has signal generator, signal generator passes through synchronous gear set constant speed rotation with the driving gear, install in the front end housing and mark the sleeve pipe with signal generator complex high frequency. The utility model discloses simple structure marks sleeve pipe and signal generator through setting up the high frequency and marks and inspect, and the high frequency marks the pulse signal that the sleeve pipe transmitted through the signal generator of receipt and can inspect and calculate out the accuracy that mechanical gauge outfit character took turns to and whether show data to mark the flowmeter.

Description

High-frequency calibration device for mechanical Roots flowmeter

Technical Field

The utility model relates to a flowmeter equipment field has especially related to a high frequency calibration device for mechanical type roots flowmeter.

Background

Roots flowmeters are high precision meters used to measure flow in a pipe continuously or intermittently. The positive displacement flowmeter has the characteristics of high precision, good reliability, light weight, long service life, convenience in installation and use and the like, and is typical of a positive displacement flowmeter. The Roots flowmeter features small pressure loss, wide measuring range, almost no influence of parameters such as density, pressure, temp. and viscosity of fluid when measuring volume flow under working condition, no movable mechanical parts, high reliability and small maintenance. The instrument parameters can work stably for a long time. The mechanical Roots flowmeter does not need power supply, has good explosion resistance, is not afraid of lightning stroke, does not lose recorded data and the like; the method is widely applied to the flow measurement in complex electromagnetic environments and remote areas. However, when the product is calibrated, the calibration difficulty is high, and when the product is calibrated at a small flow, factors such as inaccurate calibration and timing exist, which bring difficulties to production and calibration.

Chinese patent No. CN205806616U discloses a kidney wheel flowmeter valve body, which comprises a housing, a first kidney wheel body, a second kidney wheel body, a cover plate and a bearing gland, an installation opening has been seted up on the housing, the cover plate is fixed on the installation opening and forms the cavity in using the housing, be provided with two pivot that are parallel to each other in the cavity, first kidney wheel body and second kidney wheel body are fixed respectively in two pivots, two pivots outwards extend to outside the cover plate, the end fixing of two pivots has intermeshing's synchronizing gear, the end fixing of cover plate has the bearing frame that is used for installing the bearing, be fixed with the bearing gland on the bearing frame, the end fixing of one of them pivot has the piece of getting rid of oil, the end fixing of another pivot has the signaling disc, be equipped with the spring between synchronizing gear and the bearing, set up the oil inlet and the oil-out of perpendicular to pivot on the housing. The utility model discloses a roots flowmeter valve body, simple structure is compact, easy dismounting, makes things convenient for on-the-spot maintenance and maintenance, and difficult card is dead, whole job stabilization, and the reliability is high, and the running accuracy is high. But this utility model is demarcated comparatively difficultly when the product is demarcated.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to mechanical type roots's flowmeter among the prior art when the product is markd, there is the shortcoming that the degree of difficulty is big of maring, provides a simple accurate high frequency calibration device that is used for mechanical type roots's flowmeter is markd to the product.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

a high frequency calibration device for mechanical type roots flowmeter, including casing and front end housing, install first waist shaft and second waist shaft in the casing, the end fixing of first waist shaft and second waist shaft has synchronous gear set, synchronous gear set includes intermeshing's first synchronizing gear and second synchronizing gear, first synchronizing gear is connected with first waist shaft, second synchronizing gear is connected with second waist shaft, still be fixed with after first synchronizing gear is passed to the tip of first waist shaft and be used for the driving gear of being connected with reduction gear, the tip of second waist shaft is connected with signal generator after passing second synchronizing gear, signal generator and driving gear pass through synchronous gear set constant speed rotation, install in the front end housing with signal generator complex high frequency calibration sleeve pipe. The driving gear is used for being connected with the reduction gear, the volume of fluid flowing through the flowmeter is finally displayed on a character wheel of the mechanical meter head through the reduction gear, namely, the low-frequency counter displays the flow, the high-frequency calibration sleeve and the signal generator are arranged for calibration and inspection, after the fluid enters the flowmeter, the driving gear and the signal generator rotate at the same speed under the action of the synchronous gear set, the high-frequency calibration sleeve can inspect and calculate the accuracy of display data on the character wheel of the mechanical meter head by receiving pulse signals transmitted by the signal generator, so that the flowmeter is calibrated, the linear precision and the repeatability precision of the flowmeter can be inspected, and the high frequency and the low frequency realize the proportional linkage relationship through the synchronous gear set, thereby solving the problem between the display and the calibration of the mechanical Roots flowmeter; the whole structure is simple, the inspection automation degree is high, the problem of inaccurate calibration and timing in small-flow calibration is effectively avoided, and the working efficiency of production and inspection is improved.

Preferably, the end parts of the first waist wheel shaft and the second waist wheel shaft are further fixed with bearing installation seats, a first bearing matched with the first waist wheel shaft and a second bearing matched with the second waist wheel shaft are installed in the bearing installation seats, a first bearing cover matched with the first bearing and a second bearing cover matched with the second bearing are further installed on the bearing installation seats, the end part of the first waist wheel shaft sequentially penetrates through the first synchronizing gear, the first bearing and the first bearing cover and then is connected with the driving gear, and the end part of the second waist wheel shaft sequentially penetrates through the second synchronizing gear, the second bearing and the second bearing cover and then is connected with the signal generator. The bearing mounting seat, the first bearing gland and the second bearing gland are simple in structure, convenient to detach and convenient to maintain.

Preferably, the signal generator comprises a signaling disc, magnetic steel matched with the high-frequency calibration sleeve is installed on the signaling disc, and a first oil throwing sheet is further installed on the signaling disc. The structure of the signaling disc is simple, the signaling disc rotates to drive the magnetic steel to rotate and generate pulse signals, the high-frequency calibration sleeve is used for detecting the pulse signals, and character wheel display data of the mechanical gauge head can be calibrated through the high-frequency calibration sleeve.

As the preferred, seted up the installation cavity in the front end housing, driving gear and signal generator all are located the installation cavity, still offer the mounting groove that is used for installing the high frequency and marks the sheathed tube on the front end housing, mounting groove and installation cavity intercommunication.

Preferably, a shaft end sleeve matched with the first waist wheel shaft is further installed in the first bearing cover, and a second oil throwing sheet is installed at the end of the shaft end sleeve.

Preferably, the mechanical watch comprises a mechanical watch head and a reduction gear, wherein the driving gear is connected with the reduction gear, the driving gear rotates to drive the reduction gear to rotate, and the reduction gear is connected with the mechanical watch head. The mechanical head is used to ultimately display the volumetric flow rate of the fluid through the meter.

The utility model discloses owing to adopted above technical scheme, have apparent technological effect: the utility model discloses a set up high frequency and mark sleeve pipe and signal generator and mark and examine, after the fluid got into the flowmeter, driving gear and signal generator rotate at the same speed under synchronous gear set's effect, the high frequency marks the sleeve pipe and can examine through the pulse signal of receiving signal generator transmission and calculate the accuracy that shows data on the mechanical gauge head character wheel, thereby mark the flowmeter, and can examine out the linear precision and the repeatability precision of flowmeter; the whole structure is simple and compact, the inspection automation degree is high, the problem of inaccurate calibration and timing in small-flow calibration is effectively avoided, and the working efficiency of production and inspection is improved.

Drawings

Fig. 1 is a schematic structural view of a housing.

Fig. 2 is a schematic structural diagram of the high-frequency calibration device.

Fig. 3 is a schematic structural diagram of the high-frequency calibration sleeve.

Fig. 4 is a schematic diagram of a signaling disk.

The names of the parts indicated by the numerical references in the drawings are as follows: the device comprises a shell 1, a front end cover 2, a front end cover 21, an installation cavity 22, an installation groove, a first waist wheel shaft 3, a first synchronous gear 31, a driving gear 32, a second waist wheel shaft 4, a second synchronous gear 41, a signaling disc 5, magnetic steel 51, a first oil throwing sheet 52, a high-frequency calibration sleeve 6, a bearing installation seat 7, a first bearing 71, a first bearing cover 711, a first bearing cover 72, a second bearing cover 721, a second bearing cover 73, a shaft end sleeve 74, a second oil throwing sheet 74, a mechanical gauge head 8 and a reduction gear 9.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

A high frequency calibration device for a mechanical roots flowmeter, as shown in fig. 1-4, the high frequency calibration device for a mechanical roots flowmeter comprises a housing 1 and a front end cover 2, a first waist wheel shaft 3 and a second waist wheel shaft 4 are installed in the housing 1, a synchronous gear set is fixed at the end parts of the first waist wheel shaft 3 and the second waist wheel shaft 4, the synchronous gear set comprises a first synchronous gear 31 and a second synchronous gear 41 which are meshed with each other, the first synchronous gear 31 is connected with the first waist wheel shaft 3, the second synchronous gear 41 is connected with the second waist wheel shaft 4, a driving gear 32 for connecting with a reduction gear 9 is fixed at the end part of the first waist wheel shaft 3 after penetrating through the first synchronous gear 31, a signal generator is connected at the end part of the second waist wheel shaft 4 after penetrating through the second synchronous gear 41, the signal generator and the driving gear 32 rotate at a constant speed through the synchronous gear set, the front end cover 2 is internally provided with a high-frequency calibration sleeve 6 matched with the signal generator. The driving gear 32 is used for connecting with the reduction gear 9, and the volume of the fluid flowing through the flowmeter is finally displayed on the character wheel of the mechanical meter head 8 through the reduction gear 9, the high-frequency calibration sleeve 6 and the signal generator are arranged for calibration and inspection, after the fluid enters the flowmeter, the driving gear 32 and the signal generator rotate at the same speed under the action of the synchronous gear set, the high-frequency calibration sleeve 6 can inspect and calculate the accuracy of the display data on the character wheel of the mechanical meter head 8 by receiving the pulse signal transmitted by the signal generator, so that the flowmeter is calibrated, and the linear precision and the repeatability precision of the flowmeter can be inspected; the whole structure is simple, the inspection automation degree is high, the problem of inaccurate calibration and timing in small-flow calibration is effectively avoided, and the work efficiency of production and inspection is improved.

The end parts of the first and second

lumbar gear shafts

3 and 4 are further fixed with a bearing mounting seat 7, a first bearing 71 used for being matched with the first lumbar gear shaft 3 and a second bearing 72 used for being matched with the second lumbar gear shaft 4 are installed in the bearing mounting seat 7, a first bearing cover 711 matched with the first bearing 71 and a second bearing cover 721 matched with the second bearing 72 are further installed on the bearing mounting seat 7, the end part of the first lumbar gear shaft 3 sequentially penetrates through the first synchronizing gear 31, the first bearing 71 and the first bearing cover 711 and then is connected with the driving gear 32, and the end part of the second lumbar gear shaft 4 sequentially penetrates through the second synchronizing gear 41, the second bearing 72 and the second bearing cover 721 and then is connected with the signal generator. The bearing mounting seat 7, the first bearing cover 711 and the second bearing cover 721 are simple in structure, convenient to detach and convenient to maintain.

The signal generator comprises a signaling disc 5, magnetic steel 51 matched with the high-frequency calibration sleeve 6 is arranged on the signaling disc 5, and a first oil throwing sheet 52 is also arranged on the signaling disc 5. The structure of the signaling disc 5 is simple, the signaling disc 5 rotates to drive the magnetic steel 51 to rotate and generate pulse signals, the high-frequency calibration sleeve 6 is used for detecting the pulse signals, and character wheel display data of the mechanical gauge outfit 8 can be calibrated through the high-frequency calibration sleeve 6; the first oil slinger 52 is used for slinging the lubricating oil onto the second bearing 72 to lubricate the second bearing 72.

Still include mechanical gauge outfit 8 and reduction gear 9, driving gear 32 is connected with reduction gear 9, and driving gear 32 is rotatory to drive reduction gear 9 and is rotatory, and reduction gear 9 is connected with mechanical gauge outfit 8. The mechanical head 8 is used to ultimately display the volumetric flow rate of the fluid through the meter.

The utility model discloses a theory of operation: when airflow enters a flowmeter from a pipeline, the first waist wheel shaft 3 and the second waist wheel shaft 4 are pushed to rotate, the first waist wheel shaft 3 rotates to drive the first synchronous gear 31 and the driving gear 32 to synchronously rotate, the driving gear 32 drives the reduction gear 9 to rotate, and after the reduction gear 9 reduces the speed, the volume flow of the gas flowing through the flowmeter is finally displayed on a character wheel of the mechanical meter head 8; meanwhile, the second waist wheel shaft 4 rotates to drive the second synchronous gear 41 and the signaling disc 5 to synchronously rotate, because the first synchronous gear 31 and the second synchronous gear 41 are synchronous gears, the driving gear 32 and the signaling disc 5 rotate at the same speed under the action of the synchronous gear set, the signaling disc 5 rotates to drive the magnetic steel 51 to rotate and generate pulse signals, the high-frequency calibration sleeve 6 is used for detecting the pulse signals and calculating the accuracy of character wheel display data on the mechanical meter head 8, and further calibrating the flowmeter and detecting the linear precision and the repeatability precision of the flowmeter.

Example 2

The high-frequency calibration device for the mechanical Roots flowmeter is different from the embodiment 1 in that: an installation cavity 21 is formed in the front end cover 2, the driving gear 32 and the signal generator are both located in the installation cavity 21, an installation groove 22 used for installing the high-frequency calibration sleeve 6 is further formed in the front end cover 2, and the installation groove 22 is communicated with the installation cavity 21. The front end cover 2 has a simple structure and is convenient to maintain.

Example 3

The high-frequency calibration device for the mechanical Roots flowmeter is different from the embodiment 1 in that: a shaft end sleeve 73 matched with the first waist wheel shaft 3 is further installed in the first bearing pressure cover 711, and a second oil throwing sheet 74 is installed at the end of the shaft end sleeve 73. The second oil slinger 74 is used for slinging the lubricating oil onto the first bearing 71 to lubricate the bearing.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.

Claims

1. A high frequency calibration device for mechanical type roots flowmeter, including casing (1) and front end housing (2), its characterized in that: a first waist wheel shaft (3) and a second waist wheel shaft (4) are installed in a shell (1), a synchronous gear set is fixed at the end portions of the first waist wheel shaft (3) and the second waist wheel shaft (4), the synchronous gear set comprises a first synchronous gear (31) and a second synchronous gear (41) which are meshed with each other, the first synchronous gear (31) is connected with the first waist wheel shaft (3), the second synchronous gear (41) is connected with the second waist wheel shaft (4), a driving gear (32) used for being connected with a reduction gear (9) is further fixed at the end portion of the first waist wheel shaft (3) after penetrating through the first synchronous gear (31), a signal generator is connected at the end portion of the second waist wheel shaft (4) after penetrating through the second synchronous gear (41), the signal generator and the driving gear (32) rotate at a constant speed through the synchronous gear set, and a high-frequency calibration sleeve (6) matched with the signal generator is installed in a front end cover (2).

2. The high frequency calibration device for mechanical roots flowmeters of claim 1, wherein: the end parts of the first waist wheel shaft (3) and the second waist wheel shaft (4) are further fixed with bearing installation seats (7), a first bearing (71) matched with the first waist wheel shaft (3) and a second bearing (72) matched with the second waist wheel shaft (4) are installed in the bearing installation seats (7), a first bearing cover (711) matched with the first bearing (71) and a second bearing cover (721) matched with the second bearing (72) are further installed on the bearing installation seats (7), the end part of the first waist wheel shaft (3) sequentially penetrates through the first synchronizing gear (31), the first bearing (71) and the first bearing cover (711) and then is connected with the driving gear (32), and the end part of the second waist wheel shaft (4) sequentially penetrates through the second synchronizing gear (41), the second bearing (72) and the second bearing cover (721) and then is connected with the signal generator.

3. The high frequency calibration device for mechanical roots flowmeters according to claim 2, wherein: the signal generator comprises a signaling disc (5), magnetic steel (51) matched with the high-frequency calibration sleeve (6) is installed on the signaling disc (5), and a first oil throwing sheet (52) is further installed on the signaling disc (5).

4. The high frequency calibration device for mechanical roots flowmeters according to claim 2, wherein: a mounting cavity (21) is formed in the front end cover (2), the driving gear (32) and the signal generator are both located in the mounting cavity (21), a mounting groove (22) used for mounting the high-frequency calibration sleeve (6) is further formed in the front end cover (2), and the mounting groove (22) is communicated with the mounting cavity (21).

5. The high frequency calibration device for mechanical roots flowmeters according to claim 2, wherein: a shaft end sleeve (73) matched with the first waist wheel shaft (3) is further installed in the first bearing pressure cover (711), and a second oil throwing sheet (74) is installed at the end of the shaft end sleeve (73).

6. The high frequency calibration device for mechanical roots flowmeters according to claim 2, wherein: still include mechanical gauge outfit (8) and reduction gear (9), driving gear (32) are connected with reduction gear (9), and driving gear (32) are rotatory to drive reduction gear (9) and are rotatory, and reduction gear (9) are connected with mechanical gauge outfit (8).