AU2013101705A4 - Sealing device of center pivot of circular irrigation sprinkler - Google Patents
Sealing device of center pivot of circular irrigation sprinkler Download PDFInfo
- Publication number
- AU2013101705A4 AU2013101705A4 AU2013101705A AU2013101705A AU2013101705A4 AU 2013101705 A4 AU2013101705 A4 AU 2013101705A4 AU 2013101705 A AU2013101705 A AU 2013101705A AU 2013101705 A AU2013101705 A AU 2013101705A AU 2013101705 A4 AU2013101705 A4 AU 2013101705A4
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- AU
- Australia
- Prior art keywords
- spherical
- sealing
- rotary
- spherical seat
- inlet pipe
- Prior art date
- 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.)
- Ceased
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
- F16L27/04—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces
- F16L27/06—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces with special sealing means between the engaging surfaces
- F16L27/073—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces with special sealing means between the engaging surfaces one of the cooperating surfaces forming the sealing means
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/09—Watering arrangements making use of movable installations on wheels or the like
- A01G25/092—Watering arrangements making use of movable installations on wheels or the like movable around a pivot centre
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
- F16L27/04—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces
- F16L27/053—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces held in place by bolts passing through flanges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Joints Allowing Movement (AREA)
Abstract
Abstract The present invention provides a sealing device of center pivot of an irrigation sprinkler, comprising a center pivot composed of a fixed water inlet pipe and a rotary water delivery pipe. A rotary spherical sealing assembly is provided between the fixed 5 water inlet pipe and the rotary water delivery pipe, the rotary spherical sealing assembly comprising a spherical seat and a spherical body that are mutually adapted, water channels communicated with each other provided at the center of the spherical seat and the spherical body, an inside of the spherical seat provided with an annular first seal groove, a sealing ring of lower spherical surface mounted inside the first seal 10 groove, the bottom end of the spherical seat fixedly connected to the fixed water inlet pipe, the top end of the spherical body fixedly connected to the rotary water delivery pipe. A spherical contact surface of the present invention is formed between the spherical seat and the spherical body by pressing against each other to realize sealing with good sealing property. The rotary spherical sealing assembly of the present 15 invention has good freedom of motion, being able to eliminate deflection movement and additional load between the rotary water delivery pipe and the fixed water inlet pipe, avoiding nonuniform abrasion loss of the sealing ring and prolonging the service life of the sealing device.
Description
SEALING DEVICE OF CENTER PIVOT OF CIRCULAR IRRIGATION SPRINKLER Field of the Invention The present invention pertains to the field of irrigation technology, which relates to a 5 sealing device of center pivot of an irrigation sprinkler. Description of the Prior art In the art of water-saving irrigation, the irrigation sprinkling technology is a water-saving irrigation technology with advanced techniques, stable performance, 10 good water-saving effect and prominent social and economic benefits. Circular irrigation sprinklers are widely promoted in use due to the advantages: big irrigation area for a single machine, strong adaptability for crops and terrain, high degree of mechanization and automation, and high energy-saving efficiency, obtaining good water-saving effect and social and economic benefits. 15 In operation of irrigation, the whole truss and cantilever portion of the circular irrigation sprinkler is driven by the tower machine to rotate about the center pivot. The fixed water inlet pipe of the center pivot is required to be stationary and the rotary water delivery pipe rotates along with the truss. Under the effect of the water pump, 20 the irrigation water is delivered to the nozzles on the truss via the fixed water inlet pipe and the rotary water delivery pipe. The rotary water delivery pipe is structurally required to consecutively rotate in 360 degrees about the fixed water inlet pipe which serves as the pivot, and therefore a certain clearance for movement is required to exist between the rotary water delivery pipe and the fixed water inlet pipe. If the design of 25 the sealing structure at the connecting position between the rotary delivery pipe and the fixed water inlet pipe is improper, serious water leak will be caused, which will severely compromise the water-saving effect of the irrigation sprinkler. Chinese utility model patent 201220173311.4 discloses a sealing structure of water 1 outlet pipe of center frame of a large-scale circular irrigation sprinkler, including fixed water inlet pipe and rotary water inlet pipe that are mutually telescoped together, 1-3 annular grooves being arranged on the contract surface of the fixed water inlet pipe or rotary water delivery pipe at the telescoping position, a Y-shape rubber sealing ring 5 being fitted in each annular groove. Chinese utility model patent 201120025484.7 discloses a water sealing device at center pivot position of a pointer irrigation sprinkler, including an upper water supply pipe and a lower water supply pipe, an upper inner liner being provided between the 10 upper and lower water supply pipes, the upper water supply pipe and the inner liner of the upper water supply pipe being coaxially welded, the outer wall of the inner lining of the upper water supply pipe being in clearance fit with the inner wall of the lower water supply pipe. A sealing ring grove and a lip sealing ring groove are provided on the inner wall of the lower water supply pipe, the O-shape sealing ring and lip sealing 15 ring being mounted in the sealing ring groove and the lip sealing ring groove respectively. Chinese utility model patent 201120293780.5 discloses a water seal structure of center standpipe of a circular irrigation sprinkler, including a rotary upper elbow, a center 20 standpipe and a rotary lower elbow, the rotary upper elbow being fixed mounted at the upper end of the center standpipe, the rotary lower elbow being fixed mounted at the lower end of the center standpipe. The creative points are: the upper end portion of the center standpipe is produced with an annular projection, a sealing rubber gasket is mounted in the annular projection, and the bottom end of the rotary upper elbow is 25 inserted in the center standpipe and sealed through the sealing rubber gasket and the center standpipe. The above patents can realize the sealing of the center pivot of a circular irrigation sprinkler, but the above-mentioned patents are limited to the use of O-shape, Y-shape, 30 lip seals and other rubber seals, trying to minimize the radial clearance between the 2 rotary water delivery pipe and the center fixed water inlet pipe, i.e. the radial sealing technology, to solve the problem of water leakage when there is relative rotational movement between the two. The defects of the prior sealing technology exist in the following areas: 1) To ensure the rotary motion between the fixed water inlet pipe and 5 the rotary water delivery pipe, a minimum clearance must be kept between the two, so the existence of this clearance has become the biggest leaks hazards; 2) because O-shape, Y-shape, lip sealing rings are manufactured rubber materials, the abrasion speed of the sealing rings in the above patents is fast when the rotary water delivery pipe of the irrigation sprinkler is in rotary motion of 360 degrees relative to the fixed 10 water inlet pipe, and water leak amount increases rapidly with the abrasion of the sealing ring; 3) when the rotary water delivery pipe of the irrigation sprinkler is in rotary motion of 360 degrees about the fixed water inlet pipe, affected by the flatness of the ground, the rotary water delivery pipe will produce deflected swinging motion relative to the fixed water inlet pipe, resulting in different friction forces and 15 nonuniform abrasion loss in each radial position for the O-shape, Y-shape, lip sealing rings in the aforementioned patents; 4) in the above-mentioned patents, the sealing rings are mounted in the radial clearance between the rotary water delivery pipe and the fixed water inlet pipe, the sealing rings being unable to automatically compensate for abrasion clearance after abrasion, resulting in further serious water leaks, and 20 when replaced in maintenance, they can only to replaced after the rotary water delivery pipe and the fixed water inlet pipe are detached from each other, and the replacement maintenance requires cranes and other large equipment, the labor of replacement work is intensive. 25 Summary of the Invention An object of the present invention is, in view of the existing problem with the prior art, to provide a sealing device of center pivot of a circular irrigation sprinkler with good sealing effect and long service life. 30 Accordingly, the present invention adopts the following technical schemes: 3 A sealing device of center pivot of an irrigation sprinkler, comprising a center pivot composed of a fixed water inlet pipe and a rotary water delivery pipe, characterized in that a rotary spherical sealing assembly is provided between the fixed water inlet pipe 5 and the rotary water delivery pipe, the rotary spherical sealing assembly comprising a spherical seat and a spherical body that are mutually adapted, water channels communicated with each other provided at the center of the spherical seat and the spherical body, an inside of the spherical seat provided with an annular first seal groove, a sealing ring of lower spherical surface mounted inside the first seal groove, 10 and a side of the sealing ring of lower spherical surface facing the spherical body 8 being an arc surface; the bottom end of the spherical seat fixedly connected to the fixed water inlet pipe, the top end of the spherical body fixedly connected to the rotary water delivery pipe; wherein the purpose of the design of the arc surface of the sealing ring of lower spherical surface is to allow fitting between the outside surface 15 of the sealing ring of lower spherical surface and the spherical surface of the spherical body, reducing the friction between the sealing ring of lower spherical surface and the spherical body. Further, the top end of the spherical seat is provided with an upper flange of spherical 20 seat, an annular sealing gland provided above the upper flange of spherical seat; an inside surface of the sealing gland is provided with an annular second seal groove, inside which a sealing ring of upper spherical surface is mounted, a side of the seal ring of upper spherical surface facing the spherical body being an arc surface; the upper flange of spherical seat and the sealing gland fixedly connected through bolts 25 therebetween. The principle of design of the arc surface of the sealing ring of upper spherical surface is same as that of the sealing ring of lower spherical surface. Further, a seal adjustment washer is provided between the upper flange of spherical seat and the sealing gland, the upper flange of spherical seat, sealing gland and seal 30 adjustment washer fixedly connected through bolts therebetween. Because a certain 4 clearance exists between the bottom of the sealing ring of upper spherical surface and the upper flange of spherical seat, when in use seal adjustment washers of different thickness can be provided. After abrasion occurs to the arc surface of the sealing ring of upper spherical surface, the position of the sealing ring of upper spherical surface 5 can be moved downward through replacing with seal adjustment washer of smaller thickness so as to reduce the clearance between the inside arc surface of the sealing ring of upper spherical and the outer spherical surface of the spherical body to achieve the automatic compensation of the abrasion clearance of the sealing ring of upper spherical surface. Moreover, comparing with replacing the sealing ring of upper 10 spherical surface, replacing the seal adjustment washer is easier, requiring only preparation of seal adjustment washers of different thicknesses in advance and replacing the seal adjustment washer in time according to the abrasion loss of the sealing ring of upper spherical surface so that the purposes of prolong the service life of the sealing ring of upper spherical surface and reducing the maintenance 15 replacement period are achieved. Further, the inner wall of the second annular seal groove is provided with an inclined surface with an incline angle of 45 degrees. The design of the inclined surface facilitates the inclined downward movement and clearance compensation of the 20 sealing ring of upper spherical surface when replacing with seal adjustment washers of smaller thickness, benefiting the engagement of the sealing ring of upper spherical surface with the spherical body due to the inclined downward pressing effect of the inclined surface to the sealing ring of upper spherical surface. 25 Further, the top end opening of the spherical seat and the center of the spherical body are on a same plane. Further, the plane on which the top end opening of the spherical seat is located is higher than the center of the spherical body, such that on the one hand the freedom of 30 upward movement of the spherical body is limited, and on the other hand the 5 compensation of abrasion clearance from downward movement is facilitated when abrasion occurs to the sealing ring of upper spherical surface, because during the process of the sealing ring of upper spherical surface moving downward the diameter of the contact surface between the sealing ring of upper spherical surface and the 5 spherical body become larger and larger so that the relative clearance becomes smaller and smaller. Further, an expansion joint is provided between the fixed water inlet pipe and the spherical seat, the upper end of the expansion joint fixedly connected to the bottom 10 end of the spherical seat, the lower end of the expansion joint fixedly connected to the upper end of the fixed water inlet pipe. In the present invention, the sealing is achieved through the contact surface formed between the spherical seat and the spherical body by mutual pressing against each 15 other. In comparison with the prior cylindrical contact surface between the fixed water inlet pipe and the rotary water delivery pipe, the clearance of the spherical contact surface formed by pressing under the effect of gravity is very small, which can effectively solve the water leak problem caused by the contact surface clearance. In addition, in order to achieve an ideal effect of water-proof, the sealing device of the 20 present invention is designed with a threefold anti-leak sealing structure: the sealing ring of lower spherical surface serves as the first seal for sealing the water delivered by the water pump from the fixed water inlet pipe and enters into the spherical seat and the water channels of the spherical body; the seal adjustment washer serves as the second seal for sealing the water leaking out from the contact surface between the 25 spherical body and the spherical seat after leaking from the sealing ring of lower spherical surface; and the sealing ring of upper spherical surface serves as the third seal for sealing the water leaking out from the gap between the sealing gland and the spherical body, and moreover, the sealing ring of upper spherical surface also can serve as the second seal to some extent. 30 6 The advantages of the present invention are as follows: 1) the present invention uses the spherical contact surface formed between the spherical seat and the spherical body by pressing against each other to achieve the sealing with good sealing property; 2) the rotary spherical sealing assembly of the present invention adopts spherical 5 structure having omnidirectionality with good motion freedom, being capable of eliminating the deflected movement and corresponding additional load between the rotary water delivery pipe and the fixed water inlet pipe caused by poor flatness of the ground, avoiding different friction forces of the sealing assembly at each of radial positions and nonuniform abrasion loss of the sealing ring and prolonging the service 10 life of the sealing device; 3) achieving the automatic compensation of the abrasion clearance of the sealing ring of upper spherical surface by replacing with seal adjustment washer that is more easily dismounted; 4) the expansion joint can eliminate the expansion or contraction of the fixed water inlet pipe and the rotary water delivery pipe in different seasons, eliminating the additional load imposed by 15 the fixed water inlet pipe and the rotary water delivery pipe to the sealing device due to thermal expansion and contraction and reducing the forces and abrasion endured by the sealing device to prolong the service life the sealing device so as to eliminate, to maximum extent, the water leak due to sealing failure. 20 Brief Description of the Drawings Figure 1 is a structural diagram of the present invention; Figure 2 is a structural diagram of the rotary sealing assembly of the present invention; 25 Figure 3 is a structural diagram of the spherical seat of the present invention; Figure 4 is a partial enlarged view of portion A in Figure 3; 30 Figure 5 is a structural diagram of the spherical body of the present invention; 7 Figure 6 is a structural diagram of the sealing ring of lower spherical surface of the present invention; 5 Figure 7 is a structural diagram of the sealing press cover of the present invention; Figure 8 is a structural diagram of the sealing ring of upper spherical surface of the present invention; 10 Figure 9 is a partial assembly diagram of the sealing ring of upper spherical surface and the sealing gland of the present invention; Figure 10 is a structural diagram of the expansion joint of the present invention; 15 Figure 11 is a structural diagram of the fixed water inlet pipe of the present invention; Figure 12 is a structural diagram of the rotary water delivery pipe of the present invention. 20 In the figures: 1-center tower, 2-fixed water inlet pipe, 3-rotary water delivery pipe, 4-bearing seat, 5-rotary spherical sealing assembly, 6-expansion joint, 7-spherical seat, 8-spherical body, 9-water channel, 10-water channel, 11-first seal groove, 12-sealing ring of lower spherical surface, 13-upper flange of spherical seat, 14-sealing gland, 15-seal adjustment washer, 16-second seal groove, 1601-inclined surface, 17-sealing 25 ring of upper spherical surface, 1701-arc surface, 18-lower flange of spherical seat, 19-upper flange of spherical seat, 20-lower flange of expansion joint, 21-upper flange of expansion joint, 22-flange of fixed water inlet pipe, 23-flange of rotary water delivery pipe. 30 Detailed Description of the Preferred Embodiments 8 As shown in Figures 1-12, a sealing device of the center pivot of a circular irrigation sprinkler includes a center pivot composed of a fixed water inlet pipe 2 and a rotary water delivery pipe 3, the fixed water inlet pipe 2 being fixedly connected to the center tower 1 of the circular irrigation sprinkler, the rotary water delivery pipe 3 5 being connected to the center tower 1 through the bearing seat 4; a rotary spherical sealing assembly 5 is provided between the fixed water inlet pipe 2 and the rotary water delivery pipe 3, and the rotary spherical sealing assembly 5 includes mutually adapted spherical seat 7 and spherical body 8. A water channel 9 and a water channel 10 are provided at the center of the spherical seat 7 and the spherical body 8, and the 10 water channel 9 and the water channel 10 are communicated with each other. An inside wall of the spherical seat 7 is provided with a first seal groove 11, inside which a sealing ring 12 of lower spherical surface is mounted, and a side of the sealing ring 12 of lower spherical surface facing the spherical body 8 is an arc surface 1201; the top end of the spherical seat 7 is provided with an upper flange 13 of spherical seat, 15 and an annular sealing gland 14 is provided above the upper flange 13 of spherical seat, a seal adjustment washer 15 being provided between the upper flange 13 of spherical seat and the sealing gland 14. The upper flange 13 of spherical seat, sealing gland 14 and seal adjustment washer 15 are fixedly connected through bolts therebetween; an inside surface of the sealing gland 14 is provided with a second 20 annular seal groove 16, and the inner wall of the second annular seal groove 16 is provided with an inclined surface 1601 with an incline angle of 45 degrees, a sealing ring 17 of upper spherical surface being mounted inside the second seal groove 16, a side of the seal ring 17 of upper spherical surface facing the spherical body 8 being an arc surface 1701; and the plane on which an top end opening of the spherical seat 7 is 25 a little higher than the center of the spherical body 8, which can be seen in Figure 2 and Figure 4. Two horizontal center lines are shown in Figure 2, in which the upper one of the lines indicates the plane on which the top end opening of the spherical seat 7 is, and the lower one of the lines indicates the horizontal center line of the spherical body 8, i.e. the plane on which the center of the spherical body 8 is; Figure 4 30 illustrates well the structure at the top end opening of the spherical seat 7, and the 9 circle dashed line indicates the mounting position of the spherical body 8. An expansion joint 6 is provided between the fixed water inlet pipe 2 and the spherical seat 7. The upper end of the expansion joint 6 is provided with an upper 5 flange 21 of expansion joint, and the lower end of the expansion joint 6 is provided with a lower flange 20 of expansion joint. The bottom end of the spherical seat 7 is provided with a lower flange 18 of spherical seat, and the top end of the spherical seat body 8 is provided with an upper flange 19 of spherical body. The upper end of the fixed water inlet pipe 2 is provided with a flange 22 of fixed water inlet pipe, and the 10 lower end of the rotary water delivery pipe 3 is provided with a flange 23 of rotary water delivery pipe 3; the upper end of the expansion joint 6 is fixedly connected to the bottom end of the spherical seat 7 through the upper flange 21 of expansion joint, lower flange 18 of spherical seat and bolts, and the lower end of the expansion joint 6 is fixedly connected to the upper end of the fixed water inlet pipe 2 through the lower 15 flange 20 of expansion joint, flange 22 of fixed water inlet pipe and bolts; the rotary water delivery pipe 3 is fixedly connected to the spherical body 8 through the flange 23 of rotary water delivery pipe, upper flange 19 of spherical body and bolts. Moreover, in order for the sealing gland 14 to be mounted readily, the outer diameters of the upper flange 19 of spherical body and the flange 23 of rotary water delivery 20 pipe are smaller than the inner diameter of the sealing gland 14. In order to prolong the service life and maintenance replacement period of the sealing device and to reduce the water leak amount, the surfaces of the spherical seat 7 and spherical body 8 are hard chrome plated after precision grinding in order to improve 25 the surface hardness, and are processed for abrasion resistance, so as to achieve the purposes of high matching precision, abrasion resistance, corrosion resistance and avoiding leak. When in use, the fixed water inlet pipe 2, expansion joint 6 and spherical seat 7 are all 30 held stationary, and the rotary water delivery pipe 3 drives the spherical body 8 to 10 move in rotary motion. Under the effect of a water pump, the irrigation water reaches the nozzle on the truss of the circular irrigation sprinkler via the fixed water inlet pipe 2, expansion joint 6, water channel 9, water channel 10 and rotary water delivery pipe 3, to realize irrigation sprinkling. During the process, the spherical contact surface 5 having small clearance, which is formed between the spherical seat 7 and the spherical body 8 by pressing against each other, realizes basic sealing. The sealing ring 12 of lower spherical surface, sealing ring 17 of upper spherical surface and seal adjustment washer 15 simultaneously function for better sealing to prevent leak for the best effect, and when abrasion occurs to the sealing ring 17 of upper spherical 10 surface and clearance is formed between it and the spherical body 8, a seal adjustment washer 15 with smaller thickness can be replaced according to the abrasion loss to realize an automatic compensation for the abrasion clearance of the sealing ring 17 of upper spherical surface. 15 11
Claims (7)
1. A sealing device of center pivot of an irrigation sprinkler, comprising a center pivot composed of a fixed water inlet pipe and a rotary water delivery pipe, characterized in that a rotary spherical sealing assembly is provided between the fixed 5 water inlet pipe and the rotary water delivery pipe, the rotary spherical sealing assembly comprising a spherical seat and a spherical body that are mutually adapted, water channels communicated with each other provided at the center of the spherical seat and the spherical body, an inside of the spherical seat provided with an annular first seal groove, a sealing ring of lower spherical surface mounted inside the first seal 10 groove, and a side of the sealing ring of lower spherical surface facing the spherical body 8 being an arc surface; the bottom end of the spherical seat fixedly connected to the fixed water inlet pipe, the top end of the spherical body fixedly connected to the rotary water delivery pipe. 15
2. The sealing device of center pivot of an irrigation sprinkler according to Claim 1, characterized in that the top end of the spherical seat is provided with an upper flange of spherical seat, an annular sealing gland provided above the upper flange of spherical seat; an inside surface of the sealing gland is provided with an annular second seal groove, inside which a sealing ring of upper spherical surface is mounted, 20 a side of the seal ring of upper spherical surface facing the spherical body being an arc surface; the upper flange of spherical seat and the sealing gland fixedly connected through bolts therebetween.
3. The sealing device of center pivot of an irrigation sprinkler according to Claim 2, 25 characterized in that the inner wall of the second annular seal groove is provided with an inclined surface with an incline angle of 45 degrees.
4. The sealing device of center pivot of an irrigation sprinkler according to Claim 2, characterized in that a seal adjustment washer is provided between the upper flange of 30 spherical seat and the sealing gland, the upper flange of spherical seat, sealing gland 12 and seal adjustment washer fixedly connected through bolts therebetween.
5. The sealing device of center pivot of an irrigation sprinkler according to Claim 1 or 2, characterized in that the top end opening of the spherical seat and the center of 5 the spherical body are on a same plane.
6. The sealing device of center pivot of an irrigation sprinkler according to Claim 1 or 2, characterized in that the plane on which the top end opening of the spherical seat is located is higher than the center of the spherical body. 10
7. The sealing device of center pivot of an irrigation sprinkler according to Claim 1, characterized in that an expansion joint is provided between the fixed water inlet pipe and the spherical seat, the upper end of the expansion joint fixedly connected to the bottom end of the spherical seat, the lower end of the expansion joint fixedly 15 connected to the upper end of the fixed water inlet pipe. 20 13
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310363974.1 | 2013-08-19 | ||
| CN201310363974.1A CN103423535B (en) | 2013-08-19 | 2013-08-19 | A kind of center pivot sprinkling machine center pivot sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2013101705A4 true AU2013101705A4 (en) | 2015-01-22 |
Family
ID=49648695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2013101705A Ceased AU2013101705A4 (en) | 2013-08-19 | 2013-08-26 | Sealing device of center pivot of circular irrigation sprinkler |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103423535B (en) |
| AU (1) | AU2013101705A4 (en) |
| WO (1) | WO2015024271A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109874476B (en) * | 2019-04-10 | 2021-10-26 | 山东农业工程学院 | Three-dimensional adjustable spray head for fruit tree spraying equipment |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR982411A (en) * | 1943-06-17 | 1951-06-11 | Messier Sa | Seals on joint faces, ball joints and others |
| US4012060A (en) * | 1975-03-31 | 1977-03-15 | Reneau Bobby J | Ball flex union |
| CN2221680Y (en) * | 1995-01-24 | 1996-03-06 | 曹宗瑞 | Bearing contact efficient sealing structure |
| JPH09229264A (en) * | 1996-02-19 | 1997-09-05 | Ninomiya Sangyo Kk | Bendable and expansible universal joint |
| CN2493725Y (en) * | 2001-06-03 | 2002-05-29 | 魏玺林 | Glass fibre reinforced plastics double-layer energy-saving thermal-insulating slide window frame |
| CN2516613Y (en) * | 2001-12-01 | 2002-10-16 | 张书斌 | Floor drain with sealing cover |
| CN201496714U (en) * | 2009-09-08 | 2010-06-02 | 泰州市新方圆补偿器制造有限公司 | High temperature resistant corrugated expansion joint |
| CN201706109U (en) * | 2010-05-11 | 2011-01-12 | 成都川路塑胶集团有限公司 | Correcting sealing water pipe joint |
| CN102261534A (en) * | 2011-05-04 | 2011-11-30 | 同济大学 | Novel pipeline flexible joint with great deformation capability |
| CN102563254A (en) * | 2012-03-28 | 2012-07-11 | 天津佩霖分析仪器有限公司 | Novel rotary joint |
| CN202868155U (en) * | 2012-09-07 | 2013-04-10 | 江苏中兴水务有限公司 | Spherical universal joint swing arm-type connecting pipe of water intaking pump vessel |
| CN102878370A (en) * | 2012-09-19 | 2013-01-16 | 常州市常泰冷却设备有限公司 | Pipe joint device taking arc surface as sealing surface |
| CN202812560U (en) * | 2012-09-22 | 2013-03-20 | 山东飞越机械有限公司 | Half-ring flange type spherical rotary joint |
| CN203453675U (en) * | 2013-08-19 | 2014-02-26 | 甘肃华瑞农业股份有限公司 | Sealing device of central supporting shaft of center pivot sprinkling machine |
-
2013
- 2013-08-19 CN CN201310363974.1A patent/CN103423535B/en active Active
- 2013-08-26 AU AU2013101705A patent/AU2013101705A4/en not_active Ceased
- 2013-08-26 WO PCT/CN2013/082258 patent/WO2015024271A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN103423535A (en) | 2013-12-04 |
| WO2015024271A1 (en) | 2015-02-26 |
| CN103423535B (en) | 2016-12-28 |
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