CN210522836U - Stepless variable nozzle with controllable orifice diameter of outflow opening - Google Patents
Stepless variable nozzle with controllable orifice diameter of outflow opening Download PDFInfo
- Publication number
- CN210522836U CN210522836U CN201921209809.XU CN201921209809U CN210522836U CN 210522836 U CN210522836 U CN 210522836U CN 201921209809 U CN201921209809 U CN 201921209809U CN 210522836 U CN210522836 U CN 210522836U
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- nozzle
- ejector rod
- cam
- nozzle cap
- valve core
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Abstract
The utility model discloses a stepless variable nozzle with controllable aperture of an outflow opening, which comprises a nozzle body, a nozzle cap, a bracket, a spring, a mandril, a valve core, a servo motor and a cam; the nozzle body is connected with the nozzle cap, the valve core is installed in the nozzle body, the support is installed on the nozzle cap, the servo motor is installed on the support, the cam is installed on an output shaft of the servo motor and keeps contact with an ejector rod below the cam, the ejector rod is pre-tightened through a spring, the ejector rod sequentially penetrates through the nozzle cap and the valve core, the servo motor drives the cam to rotate and further pushes the ejector rod to do linear motion, the size of the aperture of an outflow opening of the nozzle body is changed by utilizing a conical head at the tail end of the ejector rod, namely the size of the through-flow sectional area, and therefore. The utility model discloses can satisfy the requirement to shower nozzle flow ration regulation and control or variable spraying control, and have the advantage that the flow regulation and control precision is high.
Description
Technical Field
The utility model relates to a technical field of agricultural production equipment (devices such as pesticide preparation, growth regulator, the variable of liquid fertilizer spray of crops, fruit tree etc.) especially indicates a controllable infinitely variable shower nozzle of outflow aperture.
Background
At present, in agricultural plant protection operation, most of spray heads used by plant protection devices for spraying pesticide preparations and the like are quantitative spray heads, the aperture (through-flow sectional area) of an outlet is constant, the spray flow rate of the spray heads is related to the spray pressure, a stable spray flow rate is achieved under a certain spray pressure, the atomization state and the droplet particle size distribution are good, and the atomization state is deteriorated under other spray pressures. Such spray heads are therefore only suitable for quantitative continuous spraying operations at a certain spray pressure (or within a small pressure variation range). To achieve variable spray, the spray amount needs to be changed by changing the spray pressure of the sprayer, for example, the spray amount can be increased by increasing the spray pressure. However, for such a constant-volume nozzle having a constant outlet orifice diameter (flow cross-sectional area), the change in the spray flow rate is not proportional to the change in the spray pressure, and the change in the spray flow rate is often small due to a large change in the spray pressure, and the change in the spray pressure changes the atomization characteristics of the nozzle, thereby affecting the operation effect. For example, when the spray pressure is increased, the flow rate is slightly increased but the droplet size is decreased, and when the spray pressure is decreased, the flow rate is decreased and the droplet size is increased.
Currently, variable spray technology has become a main method for solving a series of problems of environmental pollution, pesticide waste and the like caused by excessive use of pesticides. The variable spray technology has various realization methods, wherein the variable spray head has the advantages of simple control system and small time delay, and has certain application value.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's shortcoming and not enough, provide a controllable infinitely variable shower nozzle of outflow aperture, can be according to the outflow aperture (flow cross sectional area) and the regulation spraying volume size of the change control shower nozzle of spraying pressure to guarantee better atomizing state.
In order to achieve the above object, the present invention provides a technical solution: a stepless variable nozzle with a controllable orifice diameter of an outflow opening comprises a nozzle body, a nozzle cap, a support, a spring, an ejector rod, a valve core, a servo motor and a cam; the water inlet connector is close to the threaded connection part of the nozzle body and the nozzle cap and positioned above the valve core; the nozzle cap is of a hollow structure and is in a shape like a Chinese character 'tu', the convex part of the nozzle cap extends into the nozzle body and extends towards the direction of the valve core, the nozzle cap is close to the valve core, an elastic sealing gasket is clamped between the nozzle cap and the valve core, and the hollow channel of the nozzle cap is communicated with the hollow channel of the valve core and is positioned on the same axis; the bracket is arranged on the top of the nozzle cap through a screw, the servo motor is arranged on the bracket through a screw, the cam is arranged on an output shaft of the servo motor and keeps contact with a mandril positioned below the cam, and is pre-tightened by a spring, the ejector rod vertically and downwards sequentially penetrates through the hollow channels of the nozzle cap and the valve core, sealing rings are arranged between the hollow channels of the valve core and the nozzle cap, the spring is sleeved on the part of the ejector rod which is upwards exposed out of the nozzle cap, one end of the ejector rod is abutted against the top of the nozzle cap, the other end of the ejector rod is abutted against the top end of the ejector rod, the tail end of the ejector rod is provided with a conical head matched with the outflow port, the servo motor drives the cam to rotate so as to push the ejector rod to do linear motion, the size of the diameter of the outflow port of the nozzle body, namely the size of the through-flow sectional area, is changed by utilizing the conical head at the tail end of the ejector rod, and therefore the flow rate or the spray amount of the.
And the nozzle cap further comprises a cover shell, and the cover shell is arranged on the nozzle cap, covers the bracket, the spring, the ejector rod, the servo motor and the cam and plays a role in sealing.
Furthermore, the cam is an eccentric disc cam, the distance between the center of the disc and the rotation center of the cam is the maximum stroke of the ejector rod, and the rotation angle of the cam, namely the rotation angle of the servo motor, is in a linear relation with the stroke of the ejector rod.
Furthermore, the ejector rod is a circular variable cross-section straight rod, and the top end of the ejector rod is provided with a boss.
Furthermore, the outflow opening is of a horn-shaped structure.
Compared with the prior art, the utility model, have following advantage and beneficial effect:
the cam arranged on an output shaft of the servo motor is driven to rotate through the servo motor so as to push the ejector rod to do linear motion, the cam converts the large-angle rotary motion of the servo motor into the micro linear motion of the ejector rod, and the sectional area of an outflow opening of a nozzle body is changed by utilizing a conical head at the tail end of the ejector rod, so that the high-precision control of the through-flow sectional area of the spray head and the adjustment of the spray amount are realized. In a word, the utility model discloses can satisfy the requirement of variable spraying with the efflux mouth flow of great range regulation shower nozzle according to the change of spraying pressure, keep the atomization performance of shower nozzle invariable simultaneously, have practical application and worth.
Drawings
Fig. 1 is one of the schematic structural diagrams of the infinitely variable nozzle of the present invention.
Fig. 2 is a second schematic structural view of the infinitely variable nozzle of the present invention.
Fig. 3 is a schematic view of the cam structure.
Fig. 4 is a graph showing the relationship between the rotational angle of the cam and the stroke of the jack.
Fig. 5 is a schematic view of the structure of the lift pin.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
As shown in fig. 1 and fig. 2, the stepless variable nozzle with controllable outflow opening aperture provided by this embodiment includes a nozzle body 1, a nozzle cap 3, a housing 4, a bracket 5, a spring 7, a ram 8, a valve core 11, a servo motor 12 and a cam 14; the nozzle body 1 is connected with the nozzle cap 3 through threads, the valve core 11 is of a hollow structure and is installed in the nozzle body, a hollow channel of the hollow structure corresponds to the outflow port of the nozzle body 1 and is located on the same axis, a water inlet connector 2 is arranged on one side of the nozzle body 1, and the water inlet connector 2 is close to the threaded connection position of the nozzle body 1 and the nozzle cap 3 and is located above the valve core 11; the nozzle cap 3 is of a hollow structure and is in a shape like a Chinese character 'tu', the convex part of the nozzle cap extends into the nozzle body 1 and extends towards the direction of the valve core 11, the nozzle cap is close to the valve core 11, an elastic sealing gasket 10 is clamped between the nozzle cap and the valve core 11, and the hollow channel of the nozzle cap 3 is communicated with the hollow channel of the valve core 11 and is positioned on the same axis; the support 5 is installed at the top of the nozzle cap 3 through a screw 13, the servo motor 12 is installed on the support 5 through a screw 6, the cam 14 is installed on an output shaft of the servo motor 12 and keeps contact with a mandril 8 located below the cam, the mandril 8 is pre-tightened through a spring 7, the mandril 8 vertically and downwards sequentially penetrates through hollow channels of the nozzle cap 3 and the valve core 11, and sealing rings 9 are installed between the mandril 8 and the hollow channels of the nozzle cap 3 and the valve core 11. As shown in fig. 5, the ejector rod 8 is a straight rod with a circular variable cross section, the top end of the ejector rod is provided with a boss, the tail end of the ejector rod is provided with a conical head matched with the outflow port, the spring 7 is sleeved on the part of the ejector rod 8 which is exposed out of the nozzle cap 3 upwards, one end of the spring is abutted against the top of the nozzle cap 3, and the other end of the spring is abutted against the boss of the ejector rod 8. The outflow opening of the nozzle body 1 is designed in a trumpet shape. The cover 4 is connected with the nozzle cap 3 (through threads) and covers the bracket 5, the spring 7, the ejector rod 8, the servo motor 12, the cam 14 and the like to play a role in sealing.
When the sprayer works, the servo motor 12 is controlled to rotate according to the spraying pressure and drives the cam 14 arranged on the output shaft of the servo motor to rotate, the cam 14 can convert the large-angle rotation of the servo motor 12 into the tiny linear motion of the ejector rod 8, the sectional area of the outflow port on the nozzle body 1 is changed by utilizing the conical head at the tail end of the ejector rod 8, and the high-precision micro stepless adjustment of the size (the through-flow sectional area) of the outflow port aperture of the nozzle body 1 and the spraying flow adjustment can be realized.
As shown in fig. 3, the cam 14 is an eccentric disc cam structure, and the distance between the center of the disc and the rotation center of the cam is the maximum stroke H of the ejector rod, which can be selected according to actual requirements (e.g., the size of the aperture of the nozzle body, the taper of the end of the ejector rod, etc.).
As shown in fig. 4, the rotation angle of the eccentric disc cam
(i.e. servo motor corner
) And the stroke H of the ejector rod (the maximum stroke H of the ejector rod is 0.6mm in the figure), the motion stroke H of the ejector rod and the cam rotation angle
(i.e. servo motor corner
) There is a linear relationship between:
wherein h is the movement stroke of the ejector rod, and the unit is mm; h is the maximum stroke of the ejector rod, and the unit is mm;
is the servo motor angle (cam angle) in degrees.
The cam rotates 360 degrees, and the ejector rod completes one motion cycle.
Suppose that the aperture of the outflow opening on the nozzle body is 2R, when R is more than or equal to R (R is the diameter of the lower end of the mandril), the utility model discloses a stepless variable nozzle is to the regulating range of flow cross section: 0 to pi r2(ii) a When R is less than R, the adjusting range of the through-flow sectional area is as follows: pi (r)2-R2)～πr2. The adjustment range is the theoretical maximum range, and the adjustment range of the flow cross-sectional area in practical use may be determined according to actual needs, depending on the stroke of the ejector rod, the degree of preload of the spring, the taper of the conical head at the lower end of the ejector rod, the size and installation of the nozzle body, and the like.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that all the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. The utility model provides a controllable infinitely variable shower nozzle of outflowing port aperture which characterized in that: the device comprises a nozzle body, a nozzle cap, a bracket, a spring, a mandril, a valve core, a servo motor and a cam; the water inlet connector is close to the threaded connection part of the nozzle body and the nozzle cap and positioned above the valve core; the nozzle cap is of a hollow structure and is in a shape like a Chinese character 'tu', the convex part of the nozzle cap extends into the nozzle body and extends towards the direction of the valve core, the nozzle cap is close to the valve core, an elastic sealing gasket is clamped between the nozzle cap and the valve core, and the hollow channel of the nozzle cap is communicated with the hollow channel of the valve core and is positioned on the same axis; the bracket is arranged at the top of the nozzle cap, the servo motor is arranged on the bracket, the cam is arranged on an output shaft of the servo motor and keeps contact with an ejector rod positioned below the cam, and is pre-tightened by a spring, the ejector rod vertically and downwards sequentially penetrates through the hollow channels of the nozzle cap and the valve core, sealing rings are arranged between the hollow channels of the valve core and the nozzle cap, the spring is sleeved on the part of the ejector rod which is upwards exposed out of the nozzle cap, one end of the ejector rod is abutted against the top of the nozzle cap, the other end of the ejector rod is abutted against the top end of the ejector rod, the tail end of the ejector rod is provided with a conical head matched with the outflow port, the servo motor drives the cam to rotate so as to push the ejector rod to do linear motion, the size of the diameter of the outflow port of the nozzle body, namely the size of the through-flow sectional area, is changed by utilizing the conical head at the tail end of the ejector rod, and therefore the flow rate or the spray amount of the.
2. The nozzle of claim 1, wherein the nozzle comprises: the nozzle cap is characterized by further comprising a cover, wherein the cover is arranged on the nozzle cap, covers the support, the spring, the ejector rod, the servo motor and the cam and plays a role in sealing.
3. The nozzle of claim 1, wherein the nozzle comprises: the cam is an eccentric disc cam, the distance between the center of the disc and the rotation center of the cam is the maximum stroke of the ejector rod, and the rotation angle of the cam is the rotation angle of the servo motor and is in a linear relation with the stroke of the ejector rod.
4. The nozzle of claim 1, wherein the nozzle comprises: the ejector rod is a round variable cross-section straight rod, and the top end of the ejector rod is provided with a boss.
5. The nozzle of claim 1, wherein the nozzle comprises: the outflow opening is of a horn-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921209809.XU CN210522836U (en) | 2019-07-30 | 2019-07-30 | Stepless variable nozzle with controllable orifice diameter of outflow opening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921209809.XU CN210522836U (en) | 2019-07-30 | 2019-07-30 | Stepless variable nozzle with controllable orifice diameter of outflow opening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210522836U true CN210522836U (en) | 2020-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921209809.XU Expired - Fee Related CN210522836U (en) | 2019-07-30 | 2019-07-30 | Stepless variable nozzle with controllable orifice diameter of outflow opening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210522836U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110314775A (en) * | 2019-07-30 | 2019-10-11 | 华南农业大学 | A kind of stepless variable spray head that outflow port aperture is controllable |
-
2019
- 2019-07-30 CN CN201921209809.XU patent/CN210522836U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110314775A (en) * | 2019-07-30 | 2019-10-11 | 华南农业大学 | A kind of stepless variable spray head that outflow port aperture is controllable |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200515 Termination date: 20210730 |
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| CF01 | Termination of patent right due to non-payment of annual fee |