CN204064366U - A kind of Roots's gas meter of compact conformation - Google Patents
A kind of Roots's gas meter of compact conformation Download PDFInfo
- Publication number
- CN204064366U CN204064366U CN201420235303.7U CN201420235303U CN204064366U CN 204064366 U CN204064366 U CN 204064366U CN 201420235303 U CN201420235303 U CN 201420235303U CN 204064366 U CN204064366 U CN 204064366U
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- roots
- housing
- mandrel
- pressing plate
- millimeter
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- 238000003825 pressing Methods 0.000 claims abstract description 43
- 230000008676 import Effects 0.000 claims abstract description 4
- 125000006850 spacer group Chemical group 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 22
- 239000007789 gas Substances 0.000 description 43
- 239000000428 dust Substances 0.000 description 12
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 210000000981 epithelium Anatomy 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Abstract
The utility model discloses a kind of Roots's gas meter of compact conformation, comprise housing, mandrel, Roots takes turns, sensor and display, mandrel is connected with housing by bearing, Roots takes turns and is arranged on mandrel and is located in housing, sensor is by measuring to obtain flow metering result to the rotational angle of mandrel, display is connected with flow sensor, the import of this Roots's gas meter and outlet lay respectively at the top and bottom of housing, housing front and back end is separately installed with pressing plate, mandrel is arranged on bearing relative in the pressing plate of front and back, outside pressing plate housing being positioned at housing forward end, front end end cover is installed, outside pressing plate housing being positioned at housing rear end, rear end cap is installed, described sensor is arranged in front end end cover, the outer face of front end end cover is directly provided with a short straight shape digital display meter head be connected with sensor, the display screen of this digital display meter head is arranged on the outer end face of gauge outfit.This Roots's gas meter compact conformation, intuitive display, can be easy to install and use.
Description
Technical field
The utility model relates to a kind of gas meter, particularly relates to a kind of Roots's gas meter.
Background technology
Small-flow gas pressure regulation metering system (" low discharge " refers to that design discharge is less than 40 cubes ms/h) is mainly used in the pressure regulation, the function of measuring that realize the buildings such as small-sized hotel, hotel, restaurant, Lou Dong being provided to gas transmission and distribution.At present small-flow gas pressure regulation metering system be made up of small-flow gas pressure regulating box and the epithelium table be series on the externally ported pipeline of small-flow gas pressure regulating box.Structural compactness is not high on the one hand for this system, is unfavorable for installation and maintenance, and epithelium table measuring accuracy is poor on the other hand, very large by ambient temperature variable effect.For the problems referred to above, applicant has developed a kind of compact conformation, small-flow gas pressure regulation metering system that measuring accuracy is higher, Roots's gas meter has directly been integrated in small-flow gas pressure regulating box by this system, reduce the impact of outside climatic change flow meter amount equipment, improve flow metering precision, and achieve the integrated of the pressure regulation of small-flow gas pressure regulating box and function of measuring.Above-mentioned this small-flow gas pressure regulating box requires that Roots's gas meter wherein preferably than existing Roots's gas meter more miniaturization and precise treatment, thus can make the installation of small-flow gas pressure regulating box and use more convenient.
Utility model content
For adapting to the demand, namely technical problem to be solved in the utility model is to provide a kind of Roots's gas meter of compact conformation.
The utility model Roots gas meter comprises housing, mandrel, Roots takes turns, sensor and display, mandrel is connected with housing by bearing, Roots takes turns and is arranged on mandrel and is located in housing, sensor is by measuring to obtain flow metering result to the rotational angle of mandrel, display is connected with flow sensor, the import of this Roots's gas meter and outlet lay respectively at the top and bottom of housing, housing front and back end is separately installed with pressing plate, mandrel is arranged on bearing relative in the pressing plate of front and back, outside pressing plate housing being positioned at housing forward end, front end end cover is installed, outside pressing plate housing being positioned at housing rear end, rear end cap is installed, described sensor is arranged in front end end cover, the outer face of front end end cover is directly provided with a short straight shape digital display meter head be connected with sensor, the display screen of this digital display meter head is arranged on the outer end face of gauge outfit.This Roots's gas meter compact conformation, intuitive display, can be easy to install and use.
Owing to often containing a certain amount of dust in the combustion gas (as rock gas) of this Roots's gas meter, for the bearing avoiding these dust to invade Roots's gas meter, after causing using a period of time, the rotation flexibility ratio of this bearing declines, the rotating speed of mandrel and Roots's wheel is reduced, enclosure interior air pressure is caused to increase further, once enclosure interior air pressure is increased to a certain degree, passing from the tolerance clearance between Roots's wheel and housing by meter gaseous in housing can be made, thus affect the measuring accuracy of Roots type flowmeter, Roots's gas meter is further improved to by technique scheme basis: medial surface and the Roots of pressing plate take turns between the end face relative with this medial surface and form the first sideshake, the width G reatT.GreaT.GT 0 of this first sideshake and≤0.35 millimeter, on mandrel, cover has dust-proof spacer ring, this dust-proof spacer ring has shaft sleeve part and is positioned at the projecting ring section on this shaft sleeve part external cylindrical surface, described shaft sleeve part coordinates with core axle hole axle and the rear and front end of shaft sleeve part abuts against bearing and Roots respectively to take turns on relative end face thus described dust-proof spacer ring to be axially fixed between bearing and Roots take turns, side projecting ring section facing Roots's wheel is taken turns between the end face relative with this side with Roots and is formed the second sideshake, width >=0 of this second sideshake and≤0.75 millimeter, side projecting ring section facing pressing plate is processed with at least two circles along the arrangement of projecting ring section spaced radial and the ring seal tooth being the center of circle with mandrel central axis, pressing plate coordinates with described dust-proof spacer ring noncontact and pressing plate is provided with the sealing teeth groove forming tortuous labyrinth shape gap with ring seal tooth, the monolateral gap of flank between described ring seal tooth and sealing teeth groove is > 0 and≤0.5 millimeter.This structure can effectively prevent from entering bearing by the dust in meter gaseous, and its dust-proof sealing structure also can not produce the resistance hindering mandrel and Roots to take turns rotation simultaneously, therefore, it is possible to the better measuring accuracy ensureing Roots's gas meter.
Further, the width of described first sideshake is 0.05-0.25 millimeter, then at least large than the width of the first sideshake 0.15 millimeter of the width of described second sideshake.When the width of the first sideshake be 0.05-0.25 millimeter and at least large than the width of the first sideshake 0.15 millimeter of the width of the second sideshake time, when the first sideshake enters the second sideshake, pressure is reduced due to the wide variety of the second sideshake by meter gaseous in Roots's gas meter housing, dust in gas trends towards flowing in less the second sideshake of pressure, therefore dust is more easily gathered in the second sideshake, and then decrease the dust quantity entering tortuous labyrinth shape gap, further increase dust seal effect; Because the width of the second sideshake is larger than the width of the first sideshake, therefore side projecting ring section facing Roots's wheel is recessed in the medial surface of pressing plate, also can avoid taking turns formation movement interference to Roots.The width of the first sideshake can be preferably 0.1-0.2 millimeter again, the width of the second sideshake is preferably 0.4-0.6 millimeter again, at this moment, the width of the first sideshake is ensured than the manufacturing process be easier to by current, also can prevent simultaneously by meter gaseous more enter in the second sideshake by the first sideshake, the better measuring accuracy of guarantee Roots gas meter; Also the aggregate amount of dust in the second sideshake better can be ensured when the width of the second sideshake is 0.4-0.6 millimeter.
Ring seal tooth described in above-mentioned each technical scheme and the monolateral gap of flank between sealing teeth groove are preferably 0.1-0.3 millimeter; Be more preferably 0.2-0.3 millimeter.In above-mentioned each technical scheme, the shaft sleeve part of dust-proof spacer ring and the monolateral tolerance clearance of mandrel are preferably 0.1-0.15 millimeter.Described in above-mentioned each technical scheme, the monolateral tolerance clearance of the shaft sleeve part of pressing plate and dust-proof spacer ring is preferably 0.05-0.35 millimeter; Be more preferably 0.2-0.3 millimeter.
Below in conjunction with the drawings and specific embodiments, the utility model is described further, aspect that the utility model is additional and advantage will part provide in the following description, part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of the utility model Roots gas meter embodiment 1.
Fig. 2 is the partial structurtes schematic diagram of the utility model Roots gas meter embodiment 2.
Fig. 3 is the partial structurtes schematic diagram of the utility model Roots gas meter embodiment 3.
Fig. 4 is the partial enlarged drawing at A1 place in Fig. 2.
Fig. 5 is the partial enlarged drawing at A2 place in Fig. 3.
Embodiment
As shown in Figure 1, Roots's gas meter of embodiment 1, its import 110 and outlet (are blocked by housing 100 in figure, not shown) lay respectively at the top and bottom of housing 100, housing 100 front and back end is separately installed with pressing plate 500, mandrel 200 is arranged on bearing relative in front and back pressing plate 500, outside the pressing plate 500 housing 100 being positioned at housing 100 front end, front end end cover 700A is installed, outside the pressing plate 500 housing 100 being positioned at housing 100 rear end, rear end cap 700B is installed, sensor 800 is arranged in front end end cover 700A, it is by measuring to obtain flow metering result to the rotational angle of mandrel 200, the outer face of front end end cover 700A is directly provided with a short straight shape digital display meter head 900 be connected with sensor 800, the display screen 910 of this digital display meter head 900 is arranged on the outer end face of gauge outfit.In Fig. 1, the shell 920 of digital display meter head 900 is round table-like and is arranged on by being positioned at the branched screw in its bottom surface on the outer face of front end end cover 700A.
Shown in Fig. 2,4, Roots's gas meter of embodiment 2 is on Roots's gas meter architecture basics of embodiment 1, and the width W 1 that medial surface and the Roots of pressing plate 500 take turns the first sideshake formed between end face relative with this medial surface on 300 is set as 0.15 millimeter; on mandrel 200, cover has dust-proof spacer ring 600, the projecting ring section 620 that this dust-proof spacer ring 600 has shaft sleeve part 610 and is positioned on this shaft sleeve part 610 external cylindrical surface, described shaft sleeve part 610 coordinates with mandrel 200 hole axle and the rear and front end of shaft sleeve part 610 abuts against bearing 400 and Roots respectively to take turns on 300 relative end faces thus to make described dust-proof spacer ring 600 be axially fixed at bearing 400 and Roots takes turns between 300, projecting ring section 620 faces a side that Roots takes turns 300 to take turns between end face relative with this side on 300 with Roots and form the second sideshake, the width W 2 of this second sideshake be 0 millimeter (namely projecting ring section 620 faces a side that Roots takes turns 300 take turns end face relative with this side on 300 with Roots directly contact), side projecting ring section 620 facing pressing plate 500 is processed with two circles along the arrangement of projecting ring section 620 spaced radial and the ring seal tooth 621 being the center of circle with mandrel 200 central axis, pressing plate 500 coordinates with the noncontact of described dust-proof spacer ring 600 and pressing plate 500 is provided with the sealing teeth groove 510 forming tortuous labyrinth shape gap with ring seal tooth 621, the monolateral gap of flank between described ring seal tooth 621 and sealing teeth groove 510 is 0.25 millimeter, the shaft sleeve part 610 of described dust-proof spacer ring 600 is 0.1 millimeter with the monolateral tolerance clearance of mandrel 200, pressing plate 500 is 0.25 millimeter with the monolateral tolerance clearance of the shaft sleeve part 610 of dust-proof spacer ring 600.Wherein, gap with it between corresponding side surface on a side of term " the monolateral gap of flank " finger ring shape sealing tooth 621 and sealing teeth groove 510; Term " monolateral tolerance clearance " refers to the difference of the radius of two part mating surfaces of shaft hole matching.
In Roots's gas meter of embodiment 2, the shaft sleeve part 610 of dust-proof spacer ring 600 is set as 0.1 millimeter with the monolateral tolerance clearance of mandrel 200, is conducive to dust-proof spacer ring 600 and assembles with mandrel 200; The shaft sleeve part 610 of dust-proof spacer ring 600 also can be set as 0.12 millimeter, 0.13 millimeter, 0.14 millimeter or 0.15 millimeter with the monolateral tolerance clearance of mandrel 200, but preferably not more than 0.15 millimeter.The monolateral gap of flank between ring seal tooth 621 and sealing teeth groove 510 is set as 0.25 millimeter, good sealing effectiveness can either be reached, and machining precision also easily ensures.Certainly, the monolateral gap of flank between ring seal tooth 621 and sealing teeth groove 510 is maximum also can play certain dust seal effect when being set as 0.5 millimeter.Consider from difficult processing with degree and sealing effectiveness, other any number that the monolateral gap of flank between ring seal tooth 621 and sealing teeth groove 510 also can be set as in 0.1-0.3 millimeter except 0.25 millimeter, but carry out being chosen as suitable in the scope of 0.2-0.3 millimeter.Also pressing plate 500 and the monolateral tolerance clearance of the shaft sleeve part 610 of dust-proof spacer ring 600 are set in order to 0.25 millimeter in Roots's gas meter of embodiment 1, other numerical value in 0.05-0.35 millimeter can certainly be selected, but carry out equally being chosen as suitable in the scope of 0.2-0.3 millimeter.
Shown in Fig. 3,5, Roots's gas meter of embodiment 3 is on Roots's gas meter architecture basics of embodiment 1, and the width W 1 that medial surface and the Roots of pressing plate 500 take turns the first sideshake formed between end face relative with this medial surface on 300 is still 0.15 millimeter; on mandrel 200, cover has dust-proof spacer ring 600, the projecting ring section 620 that this dust-proof spacer ring 600 has shaft sleeve part 610 and is positioned on this shaft sleeve part 610 external cylindrical surface, described shaft sleeve part 610 coordinates with mandrel 200 hole axle and the rear and front end of shaft sleeve part 610 abuts against bearing 400 and Roots respectively to take turns on 300 relative end faces thus to make described dust-proof spacer ring 600 be axially fixed at bearing 400 and Roots takes turns between 300, projecting ring section 620 faces a side that Roots takes turns 300 to take turns between end face relative with this side on 300 with Roots and form the second sideshake, the width W 2 of this second sideshake be 0.5 millimeter (at this moment projecting ring section 620 faces Roots take turns 300 a side recessed in the medial surface of pressing plate 500), side projecting ring section 620 facing pressing plate 500 is processed with two circles along the arrangement of projecting ring section 620 spaced radial and the ring seal tooth 621 being the center of circle with mandrel 200 central axis, pressing plate 500 coordinates with the noncontact of described dust-proof spacer ring 600 and pressing plate 500 is provided with the sealing teeth groove 510 forming tortuous labyrinth shape gap with ring seal tooth 621, the monolateral gap of flank between described ring seal tooth 621 and sealing teeth groove 510 is 0.25 millimeter, the shaft sleeve part 610 of described dust-proof spacer ring 600 is 0.1 millimeter with the monolateral tolerance clearance of mandrel 200, pressing plate 500 is 0.25 millimeter with the monolateral tolerance clearance of the shaft sleeve part 610 of dust-proof spacer ring 600.
Above-described embodiment 2 and Roots's gas meter of embodiment 3 all employ dust-proof spacer ring 600 and the pressing plate 500 that coordinates with this dust-proof spacer ring 600 realizes preventing housing 100 inside from entering bearing 400 by the dust in meter gaseous.Because dust-proof spacer ring 600 does not contact with pressing plate 500 (comprising ring seal tooth 621 not contact with sealing teeth groove 510), therefore this dust-proof sealing structure also can not produce the resistance hindering mandrel 200 and Roots to take turns 300 rotations, therefore, it is possible to the better measuring accuracy ensureing Roots's gas meter.Compared to Roots's gas meter of embodiment 2, Roots's gas meter of the embodiment 3 also further width W 2 by the second sideshake increases in order to 0.5 millimeter (preferably other selections are that the width W 2 of the second sideshake is increased to 0.4 millimeter or 0.6 millimeter), at this moment projecting ring section 620 faces Roots take turns 300 a side recessed in the medial surface of pressing plate 500, and then to take turns at projecting ring section 620 and Roots and between 300, to define the obviously wider chamber groove of a width W 1 compared with the first sideshake, when flowing in the second sideshake from the first sideshake by meter gaseous, more second sideshake larger towards width is flowed, thus decrease the gas flow in the tortuous labyrinth shape gap entered between ring seal tooth 621 and sealing teeth groove 510, simultaneously, dust in housing 100 speed after entering this chamber groove reduces, easily be gathered in the second sideshake, also the dust quantity entering tortuous labyrinth shape gap is just decreased.
Claims (9)
1. Roots's gas meter of a compact conformation, comprise housing (100), mandrel (200), Roots takes turns (300), sensor (800) and display, mandrel (200) is connected with housing (100) by bearing (400), Roots's wheel (300) is arranged on mandrel (200) and goes up and be located in housing (100), sensor (800) is by measuring to obtain flow metering result to the rotational angle of mandrel (200), display is connected with flow sensor (800), it is characterized in that: the import of Roots's gas meter and outlet lay respectively at the top and bottom of housing (100), housing (100) front and back end is separately installed with pressing plate (500), mandrel (200) is arranged on bearing relative in front and back pressing plate (500), front end end cover (700A) is installed in pressing plate (500) outside housing (100) being positioned at housing (100) front end, rear end cap (700B) is installed in pressing plate (500) outside housing (100) being positioned at housing (100) rear end, described sensor (800) is arranged in front end end cover (700A), the outer face of front end end cover (700A) is directly provided with a short straight shape digital display meter head (900) be connected with sensor (800), the display screen (910) of this digital display meter head (900) is arranged on the outer end face of gauge outfit.
2. Roots's gas meter of a kind of compact conformation as claimed in claim 1, is characterized in that: the shell (920) of digital display meter head (900) for round table-like and on the outer face being arranged on front end end cover (700A) by being positioned at the branched screw in its bottom surface on.
3. Roots's gas meter of a kind of compact conformation as claimed in claim 1, it is characterized in that: the medial surface of described pressing plate (500) is taken turns with Roots between (300) upper end face relative with this medial surface and formed the first sideshake, width (W1) > 0 of this first sideshake and≤0.35 millimeter; the upper cover of mandrel (200) has dust-proof spacer ring (600), this dust-proof spacer ring (600) has shaft sleeve part (610) and is positioned at the projecting ring section (620) on this shaft sleeve part (610) external cylindrical surface, described shaft sleeve part (610) coordinates with mandrel (200) hole axle and the rear and front end of shaft sleeve part (610) abuts against bearing (400) and Roots respectively to take turns on (300) relative end face thus to make described dust-proof spacer ring (600) be axially fixed at bearing (400) and Roots takes turns between (300), side projecting ring section (620) facing Roots's wheel (300) is taken turns (300) and is gone up between end face relative with this side and form the second sideshake with Roots, the width (W2) >=0 of this second sideshake and≤0.75 millimeter, side projecting ring section (620) facing pressing plate (500) is processed with the ring seal tooth (621) that at least two circles are the center of circle along the arrangement of projecting ring section (620) spaced radial and with mandrel (200) central axis, pressing plate (500) coordinates with the noncontact of described dust-proof spacer ring (600) and pressing plate (500) is provided with the sealing teeth groove (510) forming tortuous labyrinth shape gap with ring seal tooth (621), the monolateral gap of flank between described ring seal tooth (621) and sealing teeth groove (510) is > 0 and≤0.5 millimeter.
4. Roots's gas meter of a kind of compact conformation as claimed in claim 3, is characterized in that: the width (W1) of described first sideshake is 0.1-0.2 millimeter, and the width (W2) of described second sideshake is 0.4-0.6 millimeter.
5. Roots's gas meter of a kind of compact conformation as described in claim 3 or 4, is characterized in that: the monolateral gap of flank between ring seal tooth (621) and sealing teeth groove (510) is 0.1-0.3 millimeter.
6. Roots's gas meter of a kind of compact conformation as claimed in claim 5, is characterized in that: the monolateral gap of flank between ring seal tooth (621) and sealing teeth groove (510) is 0.2-0.3 millimeter.
7. Roots's gas meter of a kind of compact conformation as described in claim 3 or 4, is characterized in that: the shaft sleeve part (610) of described dust-proof spacer ring (600) and the monolateral tolerance clearance of mandrel (200) are 0.1-0.15 millimeter.
8. Roots's gas meter of a kind of compact conformation as described in claim 3 or 4, is characterized in that: described pressing plate (500) is 0.05-0.35 millimeter with the monolateral tolerance clearance of the shaft sleeve part (610) of dust-proof spacer ring (600).
9. Roots's gas meter of a kind of compact conformation as claimed in claim 8, is characterized in that: described pressing plate (500) is 0.2-0.3 millimeter with the monolateral tolerance clearance of the shaft sleeve part (610) of dust-proof spacer ring (600).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235303.7U CN204064366U (en) | 2014-05-09 | 2014-05-09 | A kind of Roots's gas meter of compact conformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235303.7U CN204064366U (en) | 2014-05-09 | 2014-05-09 | A kind of Roots's gas meter of compact conformation |
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| Publication Number | Publication Date |
|---|---|
| CN204064366U true CN204064366U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420235303.7U Expired - Lifetime CN204064366U (en) | 2014-05-09 | 2014-05-09 | A kind of Roots's gas meter of compact conformation |
Country Status (1)
| Country | Link |
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| CN (1) | CN204064366U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014450A (en) * | 2017-04-29 | 2017-08-04 | 成都伦慈仪表有限公司 | The ultrasonic flowmeter of noise reduction rectifier structure and its composition |
| CN108827413A (en) * | 2018-06-22 | 2018-11-16 | 上海功尊仪表有限公司 | A kind of Roots type flowmeter |
-
2014
- 2014-05-09 CN CN201420235303.7U patent/CN204064366U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014450A (en) * | 2017-04-29 | 2017-08-04 | 成都伦慈仪表有限公司 | The ultrasonic flowmeter of noise reduction rectifier structure and its composition |
| CN107014450B (en) * | 2017-04-29 | 2023-11-14 | 成都伦慈仪表有限公司 | Noise reduction rectifying structure and ultrasonic flowmeter comprising same |
| CN108827413A (en) * | 2018-06-22 | 2018-11-16 | 上海功尊仪表有限公司 | A kind of Roots type flowmeter |
| CN108827413B (en) * | 2018-06-22 | 2020-04-03 | 上海功尊仪表有限公司 | Roots flowmeter |
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Granted publication date: 20141231 |
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| CX01 | Expiry of patent term |