CN111889239A - Spray head for enlarging flow adjusting range - Google Patents

Abstract

The patent discloses a spray head for expanding the flow adjusting range, under the condition of increasing the same pressure, compared with the spray head without a follow-up push rod, the flow of the spray head for expanding the flow adjusting range is larger, namely the flow adjusting range of the spray head is larger under the same pressure difference; it is characterized by comprising the following components: the spray nozzle comprises a rear cover, a spring, a rear cover sealing ring, a spray nozzle body, a follow-up push rod, a spray nozzle sealing ring and a spray nozzle; the device has simple and reasonable structural design, convenient operation, safety and stability, wide application range and is beneficial to popularization.

Description

Spray head for enlarging flow adjusting range

Technical Field

The patent relates to a shower nozzle of enlarging accent class scope belongs to agricultural machine technical field.

Background

Pesticide spraying is an important process in agricultural production, and some pesticide spraying equipment requires to change the flow when spraying the pesticide, and for the shower nozzle that structure and parameter are fixed, the flow is just confirmed by the pressure differential, and specific formula is as follows:

in the formula: q-fluid flow rate;

ρ — fluid density;

p₁、p₂-regulating the fluid pressure at the inlet and outlet of the valve;

α — throttle type;

r-flow resistance;

theoretically, the value range of alpha is [ 1, 2 ], and generally, alpha =2 is taken in engineering;

taking α =2 as an example, if the flow rate is doubled, the pressure is increased by 4 times, and theoretically, if the corresponding flow regulation range is enlarged under the same pressure regulation range, the model parameter in the above formula must be changed along with the pressure change, and reflected in the structure of the head, which is equivalent to the requirement of designing a follow-up component that moves along with the pressure in the head, so that the flow rate regulation range is enlarged under the same pressure difference.

Disclosure of Invention

The purpose of this patent is to the not enough of prior art, provides a shower nozzle that enlarges accent class scope, and for other shower nozzles that do not have the follow-up push rod, under same pressure differential, the flow control scope of this shower nozzle is wider.

In order to achieve the above purpose, the following technical solutions are provided: a spray head for expanding flow regulation range is characterized by comprising: the spray nozzle comprises a rear cover (1), a spring (2), a rear cover sealing ring (3), a spray nozzle body (4), a follow-up push rod (5), a spray nozzle sealing ring (6) and a spray nozzle (7); the rear cover (1) is connected with the spray head body (4), the spray nozzle (7) is directly connected with the spray head body (4) through threads, and the rear cover sealing ring (3) and the spray nozzle sealing ring (6) ensure the sealing performance of the joint of the two positions; the upper end of the follow-up push rod (5) is provided with a convex part, liquid with certain pressure intensity is arranged below the convex part, and a spring (2) is arranged above the convex part; the middle part of the follow-up push rod (5) is provided with a cavity connecting groove, the tip of the lower part of the follow-up push rod is provided with a groove, the cavity connecting groove is directly communicated with two inner cavities of the spray head body (4), and the groove can ensure that liquid can flow out of the spray nozzle (7) when the liquid pressure is extremely low; the outer diameter of the protruding part of the follow-up push rod (5) is consistent with the inner diameter of the cavity part above the spray head body (4), and the protruding part and the cavity part are in a matching relation, and the part is subjected to leakage prevention treatment to prevent liquid from leaking into the cavity with the spring (2), so that the accuracy of pressure adjustment of two ends of the protruding part of the follow-up push rod (5) can be guaranteed, and the spring can be prevented from rusting in the liquid; the size of the nozzle is adjusted by the gap between the nozzle (7) and the tip of the lower part of the follow-up push rod (5), when the pressure of liquid in the nozzle is extremely small, the lower end of the follow-up push rod (5) directly contacts with a nozzle opening, and the liquid can be sprayed out of the nozzle (7) through a groove at the lower end of the follow-up push rod; the sensitivity of the pressure adjustment of the spray head can be adjusted by the elastic coefficient of the spring (2) and the length of the spring; the right end of the spray head body (4) is provided with a threaded water inlet pipe, so that the spray head body can be conveniently and directly fixed on other pipelines.

The technical effect and the advantage of this patent: the combination of the follow-up push rod (5), the spray head body (4) and the spring (2) can expand the flow regulating range to a great extent, and compared with a spray head without the follow-up push rod, the spray head with the expanded flow regulating range disclosed by the patent can greatly solve the problem that the flow regulating range is smaller under the same pressure difference.

Drawings

Fig. 1 is a schematic structural view of a spray head for expanding a flow regulation range when the liquid inside the spray head is low-pressure liquid.

Fig. 2 is a partially enlarged schematic view of a nozzle for enlarging a flow regulating range of a spray head when the liquid inside the spray head is low-pressure liquid.

Fig. 3 is a schematic structural view of the follower link.

Fig. 4 is a schematic view of the structure of the head body.

Wherein: 1. a rear cover; 2. a spring; 3. a rear cover sealing ring; 4. a spray head body; 5. a follow-up push rod; 6. a nozzle seal ring; 7. and (4) a nozzle.

Detailed Description

The patent is further described below with reference to the drawings and examples.

As shown in fig. 1: this patent is by: the spray nozzle comprises a rear cover (1), a spring (2), a rear cover sealing ring (3), a spray nozzle body (4), a follow-up push rod (5), a spray nozzle sealing ring (6) and a spray nozzle (7); when the sprayer works, the whole sprayer is connected into a main pipeline through the threaded connection at the right end of the sprayer body (4), and after liquid enters the threaded pipeline at the right end of the sprayer body (4) from the main pipeline, the liquid enters the upper cavity and the lower cavity of the sprayer body (4) through the cavity connecting groove at the middle section of the follow-up push rod (5); the liquid entering the cavity at the upper end of the spray head body (4) acts on the convex part at the upper end of the follow-up push rod (5), when the force of the liquid acting on the convex part at the upper end of the follow-up push rod (5) is greater than the acting force of the spring (2), the follow-up push rod (5) moves upwards, the gap between the tip of the lower part of the follow-up push rod (5) and the nozzle (7) is enlarged, and compared with the fixed spray head with the same size of the original spray nozzle, the spray nozzle of the spray head with the flow adjusting range expanded in the patent is larger, so the flow is also; when the force of the liquid acting on the convex part at the upper end of the follow-up push rod (5) is smaller than the acting force of the spring (2), the follow-up push rod (5) moves downwards, the gap between the follow-up push rod (5) and the nozzle (7) is reduced, and compared with the fixed nozzle with the same size as the original nozzle, the nozzle of the nozzle for expanding the flow regulation range disclosed by the patent is smaller, so that the flow is also smaller; thus, relative to a fixed spray head with the same nozzle size, when the liquid pressure changes, the nozzle disclosed by the patent can change in size, so that the flow change range is larger, namely the flow regulation range is larger; when the force of the liquid acting on the convex part at the upper end of the follow-up push rod (5) is far less than the acting force of the spring (2), the follow-up push rod (5) moves to the lowest position, the liquid entering the cavity at the lower end of the spray head body (4) enters the nozzle opening through the groove at the lower end of the follow-up push rod (5), and finally is sprayed out of the nozzle (7), as shown in figure 2.

The foregoing is a preferred embodiment of this patent and it will be appreciated by those skilled in the art that modifications may be made without departing from the principles of this patent and that such modifications are to be considered within the scope of this patent.

Claims (4)

1. A spray head for expanding flow regulation range is characterized by comprising: the spray nozzle comprises a rear cover (1), a spring (2), a rear cover sealing ring (3), a spray nozzle body (4), a follow-up push rod (5), a spray nozzle sealing ring (6) and a spray nozzle (7); the rear cover (1) is connected with the spray head body (4), the spray nozzle (7) is directly connected with the spray head body (4) through threads, and the rear cover sealing ring (3) and the spray nozzle sealing ring (6) ensure the sealing performance of the joint of the two positions; the outer diameter of the protruding part of the follow-up push rod (5) is consistent with the inner diameter of the cavity part above the spray head body (4), and the protruding part and the cavity part are in a matching relation, and the part is subjected to leakage prevention treatment to prevent liquid from leaking into the cavity with the spring (2), so that the accuracy of pressure adjustment of two ends of the protruding part of the follow-up push rod (5) can be guaranteed, and the spring can be prevented from rusting in the liquid; the sensitivity of the pressure adjustment of the spray head can be adjusted by the elastic coefficient of the spring (2) and the length of the spring; the right end of the spray head body (4) is provided with a threaded water inlet pipe, so that the spray head body can be conveniently and directly fixed on other pipelines.

2. The spray head for expanding the flow regulation range of claim 1, wherein: the upper end of the follow-up push rod (5) is provided with a convex part, liquid with certain pressure is arranged below the convex part, and a spring (2) is arranged above the convex part.

3. The spray head for expanding the flow regulation range of claim 1, wherein: the middle part of the follow-up push rod (5) is provided with a cavity connecting groove, the tip of the lower part of the follow-up push rod is provided with a groove, the cavity connecting groove is directly communicated with the two inner cavities of the spray head body (4), and the groove can ensure that liquid can flow out of the spray nozzle (7) when the liquid pressure is extremely low.

4. The spray head for expanding the flow regulation range of claim 1, wherein: the size of the nozzle is adjusted by the gap between the nozzle (7) and the tip of the lower part of the follow-up push rod (5), when the pressure of liquid in the nozzle is extremely small, the lower end of the follow-up push rod (5) directly contacts with the nozzle opening, and the liquid can be sprayed out of the nozzle (7) through the groove at the lower end of the follow-up push rod.

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