CN201392218Y - Rotary piston type water meter measuring chamber structure - Google Patents
Rotary piston type water meter measuring chamber structure Download PDFInfo
- Publication number
- CN201392218Y CN201392218Y CN200920113248U CN200920113248U CN201392218Y CN 201392218 Y CN201392218 Y CN 201392218Y CN 200920113248 U CN200920113248 U CN 200920113248U CN 200920113248 U CN200920113248 U CN 200920113248U CN 201392218 Y CN201392218 Y CN 201392218Y
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- CN
- China
- Prior art keywords
- piston
- mandrel
- end cap
- shell
- measuring room
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a rotary piston type water meter measuring chamber structure, which comprises an outer casing, a piston and an end cap. The outer casing is equipped with a water inlet, an upper cylinder is arranged at the center of a piston chamber, a rotary sleeve sleeved on a mandrel of a measuring chamber is arranged at the center of the upper cylinder, a vertical partition board is inserted beside the water inlet, the outer circle of the piston is axially provided with an opening, the middle of the piston is provided with an integrated transverse partition board which is distributed with water inlet orifices, a shifting rod is tightly engaged with the upper portion of a piston mandrel, the end cap is provided with a water outlet and a lower cylinder, a shifting block connected with the shifting rod is arranged at the center of the lower cylinder, and a shifting fork shifting a counting mechanism is arranged on the shifting block. The piston generates rotating torsion to perform eccentric rotation movement under action of water flow differential pressure and different flow rates in a piston chamber of the outer casing, wherein the eccentric rotation movement is a planetary limit rotation movement. Because the slide friction movement of the piston mandrel along the mandrel of the measuring chamber is changed into a rolling friction movement between the piston mandrel and the rotary sleeve, and due to reasonable matching materials, rotation resistance is greatly reduced, measuring accuracy of a water meter is increased and service life of the water meter is prolonged.
Description
Technical field
The utility model relates to the measuring room structure of the rotary piston water meter in a kind of volumetric water meter.
Background technology
Rotary piston water meter is that structure is the most complicated in all kinds of water meter products, manufacture difficulty is maximum, the highest grade of metering a kind of water meter, and product is mainly sold to Britain and former colonialist power British, as countries such as South Africa, Malaysia, New Zealand, Nepal.Measuring room structure in the rotary piston water meter is made up of measuring room shell, rotary-piston and end cap three-major-items, its principle of work is that the volumetric quantity that relies on measuring room measures, under the differential pressure of current and different flow effect, make rotate moment of torsion and rotatablely move of piston in the measuring room as off-centre, form corresponding rotating speeds, and by counting mechanism record revolution, acquisition can be surveyed the flow of current, and the relative motion between the three-major-items had not only required to rotate flexibly but also required sealing between relevant.Because the eccentric rotation of the piston of rotary piston water meter is to do planetary spacing rotation along the measuring room mandrel, rotatablely move when rotating along the measuring room mandrel except the piston mandrel, comprise that also piston inner wall is along cylinder outer wall on the measuring room and the relative slip of piston outer wall along the measuring room inwall, these mode of motion are the sliding friction campaign, facts have proved that the serious wear position is all at a certain ad-hoc location, promptly at measuring room mandrel position, and be clocklike, because stressed between two mandrels is uneven, thereby make unitary rotation increase resistance, the one-way abrasion that causes a mandrel, finally influence water meter measurement accuracy and serviceable life, when especially containing the impurity of molecule in the bad or water when water quality, the wearing and tearing aggravation of sliding friction surface, even seizure of piston is caused the mandrel bending to fracture or piston cracking, the way of solution except reasonable apolegamy material, the method that should seek not solved for a long time from structure also.
Summary of the invention
Goal of the invention of the present utility model is to avoid the defective of prior art and a kind of improved rotary piston water meter measuring room structure is provided, and is the rolling friction campaign with the sliding friction conversion of motion, to improve water meter measurement accuracy and serviceable life.
According to above-mentioned purpose, the utility model solves by following technical proposal:
A kind of rotary piston water meter measuring room structure, this measuring room structure comprises shell, be located at the end cap that piston in the shell plunger shaft and sealing are located by connecting on the shell top, described shell bottom surface is provided with the inlet opening, the plunger shaft center is provided with the upwardly extending cylinder of going up, last cylinder center is the measuring room mandrel, the other slash pocket vertical dividing plate between wall and the last cylinder outer wall in the enclosure that is provided with in the inlet opening; Described piston has a cylindrical and opening vertically, and the middle part is the disjunctor diaphragm plate, is covered with into water aperture on the diaphragm plate, and the center is the piston mandrel that extends downwards, and this piston mandrel top close-fitting has driving lever, and piston is done planetary spacing rotation in the shell plunger shaft; The following cylinder that described end cap is provided with apopore and extends downwards, cylinder center is provided with movable poke rod under the end cap, and the poke rod two ends connect slide block and shift fork respectively, and slide block is stirred by driving lever, and the top shift fork is stirred counting mechanism again; It is characterized in that being set with on the described measuring room mandrel pivoted housing of clearance fit.
Described end cap is to be provided with on the outer wall of the following cylinder of end cap and inner top surface and the vertical dividing plate groove of slash pocket mutually being located by connecting on the shell.
Compared with prior art, the pivoted housing of the utility model suit clearance fit on the measuring room mandrel, make the sliding friction of piston mandrel and measuring room mandrel change into the rolling friction of piston mandrel and pivoted housing and the rolling friction of pivoted housing and measuring room mandrel, add reasonable apolegamy material, thereby reduce rotary resistance greatly, improve water meter measurement accuracy and serviceable life, solved a difficult problem that does not overcome for a long time.
Description of drawings
Fig. 1 is the utility model sectional structure synoptic diagram.
Fig. 2 sheds cut-open view behind the end cap for Fig. 1.
Embodiment
By above-mentioned accompanying drawing the utility model embodiment is described in detail again below.
As Fig. 1～shown in Figure 2, cylinder, the 9-dividing plate that hangs down under 1-shell, 11-great circle, 12-plunger shaft, 13-inlet opening, the last cylinder of 14-, 15-measuring room mandrel, 2-piston, 21-water inlet aperture, 22-cylindrical, 23-piston mandrel, 24-diaphragm plate, 3-driving lever, 4-pivoted housing, 5-shift fork, 6-poke rod, 7-slide block, 8-end cap, the 81-.
Rotary piston water meter measuring room structure, this measuring room structure is arranged in the water meter case, comprises shell 1, is located at the piston 2 in the shell plunger shaft 12 and seals end cap 8 three-major-items that are located by connecting on shell 1 top.
Described shell 1 has a great circle 11, and the bottom surface is provided with inlet opening 13, and the guard (not shown) is located under the inlet opening, and granule foreign in the block water is guaranteed water quality.Shell great circle inner chamber is a plunger shaft 12, the plunger shaft center is provided with cylinder 14 on the upwardly extending disjunctor, last cylinder center is the measuring room mandrel 15 of disjunctor, measuring room mandrel and skeleton pressure injection one, the pivoted housing 4 of suit one clearance fit on it is provided with the vertical dividing plate 9 that is inserted between outer casing inner wall and the last cylinder outer wall on the side, inlet opening, therefore, on shell great circle inwall and last cylinder outer wall, be processed with inserting groove, with the vertical dividing plate of plug-in mounting.
Described piston 2 is positioned at shell plunger shaft 12 and does planetary spacing rotation.Piston has a cylindrical 22 and is positioned at the diaphragm plate 24 of the disjunctor of cylindrical height medium position, the upwardly extending cylinder 14 of going up of shell is positioned at below the piston diaphragm plate, be covered with into water aperture 21 on the diaphragm plate, the center is the piston mandrel 23 of the downward disjunctor that extends, the piston mandrel has driving lever 3 at diaphragm plate with the upper part close-fitting, for stirring the part of counting.Outside piston is opening vertically, and this opening sleeve is done planetary spacing rotation around the pivoted housing outside the measuring room mandrel 15 4 on shell hangs down dividing plate.
Described end cap 8 is located by connecting on shell 1 end face, the following cylinder 81 that the end cap end face is provided with the apopore (not shown) and extends downwards, this time cylinder size is the same with last cylinder size on the shell, but following cylinder is positioned at more than the piston diaphragm plate, cylinder center is provided with movable poke rod 6 under the end cap, and poke rod lower end close-fitting connects slide block 7, the shift fork 5 and the poke rod disjunctor on top, this slide block is stirred by the driving lever 3 on the piston, and shift fork 5 is stirred counting mechanism again and realized counting.End cap 8 on the shell 1 be located by connecting by the groove (not shown) on 81 outer walls of cylinder under the end cap and the inner top surface and vertical dividing plate 9 mutually plug-in mounting realize.
Piston 2 moment of torsion that rotates under the differential pressure of current and different flow effect in the plunger shaft 12 of shell 1 rotatablely moves as off-centre, form corresponding rotating speeds, and by counting mechanism record revolution, acquisition can be surveyed the flow of current.The piston eccentric rotational motion is planetary spacing rotation, and its mode of motion comprises that piston mandrel 23 is close to and the rolling friction campaign of the pivoted housing outside measuring room mandrel 15 4; Comprise that also outside piston 22 inwalls are the relative motion of shell great circle 11 inwalls along 14 outer walls of cylinder on the measuring room and outside piston 22 outer walls along the measuring room inwall, each group motion had not only required flexibly but also had required the sealing between relevant.
In order to ensure above-mentioned requirements, the material of measuring room mandrel 15 and piston mandrel 23 is being selected require apolegamy rationally, and wear-resisting as far as possible, measuring room mandrel and piston mandrel can all be selected wear resistant nylon or tin bronze, or one used wear resistant nylon, use tin bronze for one.Above-mentioned two kinds of materials all can afford to stand strong wearing and tearing.
Claims (2)
1, a kind of rotary piston water meter measuring room structure, this measuring room structure comprises shell (1), be located at the end cap (8) that piston (2) in the shell plunger shaft (12) and sealing are located by connecting on shell (1) top, described shell (1) bottom surface is provided with inlet opening (13), the plunger shaft center is provided with the upwardly extending cylinder (14) of going up, last cylinder center is measuring room mandrel (15), the other slash pocket vertical dividing plate (9) between wall and the last cylinder outer wall in the enclosure that is provided with in the inlet opening; Described piston (2) has a cylindrical (22) and opening vertically, the middle part is disjunctor diaphragm plate (24), be covered with into water aperture (21) on the diaphragm plate, the center is the piston mandrel (23) that extends downwards, this piston mandrel top close-fitting has driving lever (3), and piston is done planetary spacing rotation in the shell plunger shaft; The following cylinder (81) that described end cap (8) is provided with apopore and extends downwards, cylinder center is provided with movable poke rod (6) under the end cap, the poke rod two ends connect slide block (7) and shift fork (5) respectively, and slide block is stirred by driving lever, and the top shift fork is stirred counting mechanism again; It is characterized in that being set with on the described measuring room mandrel (15) pivoted housing (4) of clearance fit.
2, rotary piston water meter measuring room structure according to claim 1 is characterized in that described end cap (8) is to be provided with and vertical dividing plate (9) groove of slash pocket mutually being located by connecting on the shell (1) on the outer wall of the following cylinder (81) of end cap and inner top surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920113248U CN201392218Y (en) | 2009-01-24 | 2009-01-24 | Rotary piston type water meter measuring chamber structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920113248U CN201392218Y (en) | 2009-01-24 | 2009-01-24 | Rotary piston type water meter measuring chamber structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201392218Y true CN201392218Y (en) | 2010-01-27 |
Family
ID=41599039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920113248U Expired - Fee Related CN201392218Y (en) | 2009-01-24 | 2009-01-24 | Rotary piston type water meter measuring chamber structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201392218Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705891A (en) * | 2016-11-16 | 2017-05-24 | 张红卫 | Rotation angle sensor |
-
2009
- 2009-01-24 CN CN200920113248U patent/CN201392218Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705891A (en) * | 2016-11-16 | 2017-05-24 | 张红卫 | Rotation angle sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20130124 |