Handheld auxiliary irrigation device for environmental sanitation watering cart

Abstract

The invention discloses a handheld auxiliary watering device for an environmental sanitation watering cart. The handheld auxiliary watering device comprises a shell, a valve needle, a valve element and a switching assembly. The shell is provided with a first water inlet, a first water outlet and a second water outlet, and the interior of the shell is divided into an irrigation water cavity and a spraying water cavity through an annular partition part of the shell. The valve needle is installed at the first water inlet, the valve element is provided with a third water inlet, a throttling pipeline, a third water outlet and a fourth water outlet and is arranged outside the valve needle in a sleeving mode, and an elastic piece is arranged between the valve needle and the throttling pipeline so that the valve element can reset. In the first working state, water flow pushes the valve element to move forwards, a throttling gap is formed between the third water inlet and the valve needle, the water flow enters the watering water cavity from the third water outlet after throttling and pressure reduction, and low-pressure water is sprayed out from the first water outlet and is suitable for watering flowers; and in the second working state, the switching assembly is operated to drive the valve element to further move forwards, the throttling gap is enlarged, water flow enters the spraying water cavity through the fourth water outlet and the second water inlet, a high-pressure water column is sprayed out from the second water outlet, and flushing operation is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of irrigation equipment, and particularly relates to a hand-held auxiliary irrigation device for a sanitation sprinkler truck. BACKGROUND

[0002] The sanitation sprinkler truck is important equipment for cleaning and greening irrigation of urban roads. In order to improve the flexibility of operation, the hand-held auxiliary irrigation device is usually equipped on the sanitation sprinkler truck, which is used for precise flushing or irrigation in areas that cannot be covered by the main spray head of the sanitation sprinkler truck, such as the green belt of the sidewalk, the flower box of the isolation fence, the back alley, etc.

[0003] Since the hand-held irrigation device for the sanitation sprinkler truck is usually connected to high-pressure water, the pressure is appropriate when it is used for flushing the ground or irrigating trees; however, if it is directly used for watering flowers, the high water pressure will cause the petals to fall off or the branches and leaves to be damaged; therefore, the application scene of the existing hand-held irrigation device is limited. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a hand-held auxiliary irrigation device for a sanitation sprinkler truck, which has a wider application scene.

[0005] The purpose of the present application is achieved by the following technical scheme: a hand-held auxiliary irrigation device for a sanitation sprinkler truck, comprising: a shell, a valve needle, a valve core, and a switching assembly; The shell has a first water inlet, a containing cavity, an annular separation part, a first water outlet, and a second water outlet; the annular separation part separates the containing cavity into an irrigation water cavity and a jet water cavity, the first water outlet communicates with the irrigation water cavity, the annular separation part is provided with a second water inlet, and the irrigation water cavity communicates with the jet water cavity through the second water inlet; the jet water cavity communicates with the second water outlet; The valve needle is installed at the connection between the first water inlet and the containing cavity, and the outer diameter of the valve needle gradually decreases in the direction away from the first water inlet; The valve core is arranged in the containing cavity and in sliding abutment with the inner wall of the containing cavity, the valve core has a third water inlet, a throttling pipeline, a third water outlet, and a fourth water outlet, the valve core is sleeved outside the valve needle, an elastic member is connected between the valve core sleeve and the valve needle, the elastic member has a movement tendency to drive the valve needle to approach to block the third water inlet; the third water inlet and the throttling pipeline communicate in sequence; the third water outlet, the throttling pipeline, and the fourth water outlet communicate in sequence in the radial direction close to the valve core, and the third water outlet and the fourth water outlet are distributed in the direction close to the first water inlet. When the valve core needs to switch to the first working state, water flow pushes the valve core to move away from the first water inlet, and is sleeved outside the annular separation part until the valve needle opens the third water inlet, so that the first water inlet, the third water inlet, the throttling pipeline, the third water outlet, the irrigation water cavity and the first water outlet are sequentially communicated. The switching assembly is mounted on the shell, and the switching assembly is drivingly connected with the valve core. When the valve core needs to switch to the second working state, the switching assembly drives the valve core to move away from the first water inlet, so that the first water inlet, the third water inlet, the throttling pipeline, the fourth water outlet, the second water inlet, the jet water cavity and the second water outlet are sequentially communicated.

[0006] Further, the shell is also provided with an annular blocking part, which is arranged in the irrigation water cavity, so that when the valve core switches to the second working state, the annular blocking part closes the third water outlet.

[0007] Further, the shell is also provided with an annular limiting part. The valve core movably abuts against the annular limiting part, so that the valve core and the shell form a pressure regulating cavity; an outer wall of the valve core is provided with an annular flange, which is arranged in the pressure regulating cavity and abuts against one side of the annular limiting part away from the first water inlet; the valve core is also provided with a fifth water outlet, and the throttling pipeline, the fifth water outlet and the pressure regulating cavity are sequentially communicated.

[0008] Further, the third water outlet extends away from the axis of the valve core and away from the first water inlet.

[0009] Further, the fourth water outlet extends away from the axis of the valve core and away from the first water inlet.

[0010] Further, the first water outlet has a plurality of first water outlets, part of which is distributed at intervals around the axis of the shell, and part of which is distributed at intervals along the length direction of the shell.

[0011] Further, an outer wall of the shell is provided with a positioning groove, the switching assembly includes a wrench and a connecting rod, the wrench is hinged to the positioning groove through a rotating shaft, one end of the connecting rod is connected with the rotating shaft in linkage, and the other end of the connecting rod is connected with the outer wall of the valve core.

[0012] Further, the hand-held auxiliary irrigation device for the sanitation sprinkling vehicle further comprises a sprinkling cover, which is movably installed on the first water outlet and covers the jet water cavity, and the sprinkling cover is provided with a sixth water outlet and a seventh water outlet, and the jet water cavity, the sixth water outlet and the external environment are sequentially communicated; the jet water cavity is communicated with the seventh water outlet, and the seventh water outlet is communicated with the external environment when the sprinkling cover is driven by the hand to move away from the first water outlet, or the seventh water outlet is closed in the shell when the sprinkling cover is driven by the hand to move close to the first water outlet.

[0013] Further, the sprinkling cover is provided with an external thread segment, and the sidewall of the jet water cavity is provided with an internal thread segment, and the external thread segment is screwed with the internal thread segment.

[0014] Further, the hand-held auxiliary irrigation device for the sanitation sprinkling vehicle further comprises a plug, which is used for closing the sixth water outlet.

[0015] Compared with the prior art, the hand-held auxiliary irrigation device for the sanitation sprinkling vehicle has the following beneficial effects: 1. The outer sidewall of the annular partition part and the inner wall of the shell form an annular irrigation water cavity, and the inside of the annular partition part constitutes a columnar jet water cavity, and the rear end bottom of the annular partition part is closed to limit the water flow path; the irrigation water cavity is communicated with the jet water cavity through the second water inlet, and it should be noted that the communication between the irrigation water cavity and the jet water cavity does not directly pass the irrigation water from the irrigation water cavity to the jet water cavity, but uses the irrigation water cavity as the accommodation space of the water supply component (such as a valve core), and the water supply port of the water supply component is communicated with the second water inlet to realize water supply, which provides a structural basis for realizing the differential output of water pressure; 2. The outer diameter of the valve needle gradually decreases in the direction away from the first water inlet, and the valve needle has a conical structure, and the outer diameter of the valve needle gradually decreases in the direction of extending into the inside of the accommodation cavity from the end close to the first water inlet, forming a front-end sharp flow guide body, and the conical outer surface of the valve needle provides a structural basis for forming a continuously variable annular throttling gap; 3、the valve core is arranged in the accommodating cavity and in sliding abutment with the inner wall of the accommodating cavity, constituting the structural basis for switching the working state; the valve core has a cylindrical structure and is coaxially arranged in the accommodating cavity, and the outer wall of the valve core is in sliding sealing with the inner wall of the accommodating cavity through a sealing ring; the valve core has a third water inlet, a throttling pipeline, a third water outlet and a fourth water outlet; the valve core is sleeved on the valve needle, and at one end of the valve core close to the first water inlet, the third water inlet is slidably sleeved on the conical outer surface of the valve needle so as to be in sliding cooperation with the conical outer surface, forming a continuously variable annular throttling gap; an elastic member is connected between the valve core and the valve needle, the elastic member has a movement trend of driving the valve needle to move close to the third water inlet, and the elastic member is preferably a tension spring; the elastic member has a movement trend of driving the valve core to move towards the first water inlet in a normal state, so that the conical surface of the valve needle abuts at the third water inlet, forming an initial seal; the third water inlet and the throttling pipeline are sequentially communicated, and in the valve core, a throttling pipeline with a gradually reduced hole diameter is formed from the third water inlet to the front end of the valve core; the third water outlet, the throttling pipeline and the fourth water outlet are sequentially communicated along the radial direction close to the valve core, the third water outlet is communicated outside the throttling pipeline, and the fourth water outlet is communicated inside the throttling pipeline, thereby providing a basis for the subsequent third water outlet to supply water to the irrigation water cavity along the radial direction of the shell axis, and the fourth water outlet to supply water to the jet water cavity along the radial direction of the shell axis; 4、the third water outlet is closer to the front end of the shell than the third water outlet, when the device is not supplied with water, the valve core is in the initial position under the action of the elastic member, at this time, the third water inlet is sealed by the valve needle, and at the same time, the third water outlet is closed by the annular structure of the inner wall of the accommodating cavity; when the water flow pushes the valve core to move towards the front end of the shell to open the third water inlet, since the third water outlet is axially located more forwardly, the third water outlet will be out of the closed state earlier than the fourth water outlet, thereby structurally determining the flow sequence that the water flow first flows through the third water outlet and then flows through the fourth water outlet, and establishing the switching basis for the subsequent switching of the working state.

[0016] 5. The first working state is low-pressure irrigation: When the device needs to enter the first working state, high-pressure water enters the receiving cavity from the first inlet. Under the action of water pressure, the valve core overcomes the elastic force of the elastic element and slides along the receiving cavity away from the first inlet (i.e., forward). As the valve core slides forward and gradually fits outside the annular partition, the third outlet slides through the annular structure on the inner wall of the receiving cavity to connect with the irrigation water chamber. At the same time, the fourth outlet is closed by the annular partition, thus limiting the water flow to only the third outlet. After the valve core moves, an annular gap gradually forms between the third inlet and the valve needle cone surface. As the valve core moves forward, the backward elastic force of the elastic element gradually increases until it reaches equilibrium with the water pressure, thus partially opening the annular gap between the valve core and the valve needle, rather than completely opening it. The water flows from the third inlet through this annular gap into the throttling pipe, the third outlet, and the irrigation water chamber, and finally sprays out from the first outlet. In the first working state, since the annular gap between the third water inlet and the valve needle cone surface is not fully opened, the water flows through the annular gap at a lower flow rate into the throttling pipe, resulting in a greater throttling effect. Therefore, the water jet from the first water outlet has a lower impact force, making it less likely to damage the flower branches and leaves when watering the flowers.

[0017] 6. The switching component is installed on the outer wall of the housing. The switching component is used to drive the valve core to slide back and forth in the accommodating cavity, breaking the dynamic balance between the water flow force and the elastic rebound force in the first working state, thereby switching the valve core to different working states.

[0018] 7. Driven by the switching component, the valve core completely disengages from the valve needle, the annular gap fully opens, and the throttling effect fails. At this time, the water flows continuously through the throttling pipe under high pressure. The water flow force is much greater than the elastic force of the elastic element. The water flow force can lock the valve core in the second working state. Therefore, the operator only needs to perform one switching action to release the switching component, without having to continuously press and hold it. After watering is completed, the operator turns off the water supply. The water pressure in the receiving cavity disappears, and the valve core slides backward under the elastic force of the elastic element. The third inlet re-engages with the outer conical surface of the valve needle. There is no need to move the switching component, making operation convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a handheld auxiliary irrigation device for a sanitation sprinkler truck according to the present invention; Figure 2 for Figure 1 The diagram shows a cross-sectional view of a handheld auxiliary irrigation device for a sanitation sprinkler truck, wherein the valve core is in the initial state; Figure 3 for Figure 1 The diagram shows a cross-sectional view of a handheld auxiliary irrigation device for a sanitation sprinkler truck, wherein the valve core is in the first working state; Figure 4 for Figure 1A sectional view of a hand-held auxiliary irrigation device for a sanitation sprinkler truck is shown, wherein the valve core is in the second working state. Figure 5 For Figure 2 A partial enlarged sectional view of the sprinkling cover is shown.

[0020] In the figure: 1, housing; 11, first water inlet; 12, accommodating cavity; 121, irrigation water cavity; 122, jet water cavity; 123, pressure regulating cavity; 13, annular separation part; 131, second water inlet; 14, first water outlet; 15, second water outlet; 16, annular blocking part; 17, annular limiting part; 18, positioning groove; 19, internal thread section; 2, valve needle; 3, valve core; 31, third water inlet; 32, throttling pipeline; 33, third water outlet; 34, fourth water outlet; 35, annular flange; 36, fifth water outlet; 4, elastic member; 5, switching assembly; 51, wrench; 52, connecting rod; 6, sprinkling cover; 61, sixth water outlet; 62, seventh water outlet; 63, external thread section; 7, plug. DETAILED DESCRIPTION

[0021] The application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.

[0022] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein, the terms "vertical", "horizontal", "left", "right" and similar terms are used for explanation purposes only and are not intended to be limiting.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0024] As Figures 1 to 4 A hand-held auxiliary irrigation device for a sanitation sprinkler truck according to a preferred embodiment of the application is shown, which includes: a housing 1, a valve needle 2, a valve core 3, and a switching assembly 5. The housing 1 has a first water inlet 11, a receiving cavity 12, an annular partition 13, a first water outlet 14, and a second water outlet 15. The housing 1 is a hollow cylindrical handle shell. The water inlet direction of the housing 1 is defined as the rear end of the housing 1, and the water outlet direction of the housing 1 is defined as the front end of the housing 1. The first water inlet 11 is located at the rear end of the housing 1 and has an internal thread for connecting a water supply hose. The receiving cavity 12 is a smoothly machined cylindrical cavity inside the housing 1, used to accommodate the valve needle 2, the valve core 3, and to form a water passage. Based on the annular partition 13, the receiving cavity 12 is divided into an irrigation water cavity 121 and a jet water cavity 122. An integrally formed annular partition 13 is machined in the receiving cavity 12 near the front end of the housing 1. The outer wall of the annular partition 13 forms an annular irrigation water cavity 121 between the outer wall of the annular partition 13 and the inner wall of the housing 1. The interior of the annular partition 13 forms a columnar jet water cavity 122. The rear end of the annular partition 13... The bottom is closed to restrict the water flow path; the first water outlet 14 is connected to the irrigation water chamber 121, and the first water outlet 14 is located on the outer wall of the housing 1, and the first water outlet 14 is a circular channel; the annular partition 13 is provided with a second water inlet 131, and the second water inlet 131 is located on the side wall of the annular partition 13 near the end of the first water inlet 11. The irrigation water chamber 121 is connected to the jet water chamber 122 through the second water inlet 131. It should be noted that the connection between the irrigation water chamber 121 and the jet water chamber 122 does not mean that the irrigation water is directly supplied from the irrigation water chamber 121 to the jet water chamber 122. Instead, the irrigation water chamber 121 is used as a housing space for water supply components (such as valve core 3), and the water supply port of the water supply component is connected to the second water inlet 131 to achieve water supply, providing a structural basis for achieving differentiated water pressure output; the second water outlet 15 is located at the center of the front end of the housing 1 and is directly connected to the jet water chamber 122; The valve needle 2 is installed at the connection between the first water inlet 11 and the accommodating cavity 12. The valve needle 2 is integrally formed and connected to the side wall of the transition between the first water inlet 11 and the accommodating cavity 12 of the housing 1. The axis of the valve needle 2 coincides with the central axis of the housing 1. Based on the fact that the outer diameter of the valve needle 2 gradually decreases in the direction away from the first water inlet 11, the valve needle 2 has a conical structure. The outer diameter of the valve needle 2 gradually decreases from the end near the first water inlet 11 towards the inside of the accommodating cavity 12, forming a sharp front end for guiding the fluid. The conical outer surface of the valve needle 2 provides a structural basis for the subsequent formation of a continuously variable annular throttling gap. The valve core 3 is arranged in the accommodating cavity 12 and in sliding abutment with the inner wall of the accommodating cavity 12, constituting the structural basis for switching the working state. The valve core 3 has a cylindrical structure and is coaxially arranged in the accommodating cavity 12. The outer wall of the valve core 3 is in sliding sealing with the inner wall of the accommodating cavity 12 through a sealing ring. The valve core 3 has a third water inlet 31, a throttling pipe 32, a third water outlet 33 and a fourth water outlet 34. The valve core 3 is sleeved on the valve needle 2. At one end of the valve core 3 close to the first water inlet 11, the third water inlet 31 is slidably sleeved on the conical outer surface of the valve needle 2 to form a continuously variable annular throttling gap in sliding cooperation with the conical outer surface. The valve core 3 and the valve needle 2 are connected by an elastic member 4. The elastic member 4 has a movement tendency to drive the valve needle 2 to move close to the third water inlet 31. The elastic member 4 is connected between the rear end of the valve core 3 and the valve needle 2. The elastic member 4 is preferably a tension spring. Under normal circumstances, the elastic member 4 drives the valve core 3 to have a tendency to move towards the first water inlet 11, so that the conical surface of the valve needle 2 abuts at the third water inlet 31 to form an initial seal. The third water inlet 31 and the throttling pipe 32 are sequentially connected. In the valve core 3, a throttling pipe 32 with a shrinking hole diameter extends from the third water inlet 31 to the front end of the valve core 3. The third water outlet 33, the throttling pipe 32 and the fourth water outlet 34 are sequentially connected along the radial direction close to the valve core 3. The outer side of the throttling pipe 32 is connected to the third water outlet 33, and the inner side of the throttling pipe 32 is connected to the fourth water outlet 34, thereby providing a basis for the subsequent third water outlet 33 to supply water to the irrigation water cavity 121 along the radial direction of the shell 1 axis outward, and the fourth water outlet 34 to supply water to the jet water cavity 122 along the radial direction of the shell 1 axis inward. The third water outlet 33 and the fourth water outlet 34 are spaced apart along the direction close to the first water inlet 11, i.e. the third water outlet 33 is closer to the front end of the shell 1 than the third water outlet 33. When the device is not supplied with water, the valve core 3 is in the initial position under the action of the elastic member 4. At this time, the third water inlet 31 is sealed by the valve needle 2, and the third water outlet 33 is closed by the annular structure of the inner wall of the accommodating cavity 12. When the water flow pushes the valve core 3 to move towards the front end of the shell 1 to open the third water inlet 31, the third water outlet 33 will be disconnected from the closed state before the fourth water outlet 34, thereby structurally determining the flow sequence that the water flow first flows through the third water outlet 33 and then flows through the fourth water outlet 34, and establishing a switching basis for the subsequent switching of the working state.

[0025] When the valve core 3 needs to switch to the first working state, the water flow pushes the valve core 3 to move away from the first water inlet 11, and is sleeved outside the annular separation part 13, until the valve needle 2 opens the third water inlet 31, so that the first water inlet 11, the third water inlet 31, the throttling pipe 32, the third water outlet 33, the irrigation water cavity 121 and the first water outlet 14 are sequentially communicated; the first working state is a low-pressure irrigation state: when the device needs to enter the first working state, high-pressure water enters the containing cavity 12 from the first water inlet 11. Under the action of water pressure, the valve core 3 overcomes the elastic force of the elastic element 4, and slides in the containing cavity 12 away from the first water inlet 11 (i.e. forward); as the valve core 3 slides forward and gradually sleeves outside the annular separation part 13, the third water outlet 33 communicates the irrigation water cavity 121 by sliding through the annular structure of the inner wall of the containing cavity 12, and the fourth water outlet 34 is closed by the annular separation part 13, thereby limiting the water flow to only pass through the third water outlet 33. After the valve core 3 moves, an annular gap is gradually formed between the third water inlet 31 and the conical surface of the valve needle 2, and as the valve core 3 moves forward, the elastic force of the elastic element 4 gradually increases to balance with the water pressure, so that the annular gap between the valve core 3 and the valve needle 2 is partially opened rather than completely opened. The water flow enters the throttling pipe 32, the third water outlet 33, the irrigation water cavity 121 from the third water inlet 31 through this annular gap, and is finally sprayed out from the first water outlet 14. In the first working state, since the annular gap between the third water inlet 31 and the conical surface of the valve needle 2 is not completely opened, the water flow enters the throttling pipe 32 through the annular gap with a lower flow rate, and the throttling effect is larger, so the water flow sprayed from the first water outlet 14 has a lower impact force, and it is not easy to damage the branches and leaves of the flowers when irrigating the flowers.

[0026] The switching assembly 5 is installed on the shell 1, and the switching assembly 5 is in driving connection with the valve core 3; specifically, the switching assembly 5 is installed on the outer wall of the shell 1, and the switching assembly 5 is used to drive the valve core 3 to slide forward and backward in the containing cavity 12, break the dynamic balance state between the water flow impact force and the elastic force of the elastic element 4 in the first working state, and switch the valve core 3 to different working states; When the spool 3 needs to be switched to the second working state, the switching assembly 5 drives the spool 3 to move away from the first water inlet 11, so that the first water inlet 11, the third water inlet 31, the throttling pipe 32, the fourth water outlet 34, the second water inlet 131, the jet water cavity 122 and the second water outlet 15 are sequentially communicated. The second working state is a high-pressure jetting state. When the spool 3 needs to be switched to the second working state, the operator drives the switching assembly 5 by hand, and the switching assembly 5 drives the spool 3 to continue to slide forward in the accommodating cavity 12, so that the fourth water outlet 34 is connected to the second water inlet 131 on the annular partition 13. After the water flow enters the accommodating cavity 12 from the first water inlet 11, it sequentially passes through the third water inlet 31, the throttling pipe 32, the fourth water outlet 34, the second water inlet 131, enters the jet water cavity 122, and then is sprayed to the outside environment from the second water outlet 15 in the jet water cavity 122. Since the spool 3 is completely separated from the valve needle 2 under the drive of the switching assembly 5, the annular gap is completely opened, and the throttling effect is invalid. At this time, the water flow continuously passes through the throttling pipe 32 in a high-pressure state, and the water flow impact force is much greater than the rebound force of the elastic member 4. The water flow impact force can be used to lock the spool 3 in the second working state, so the operator only needs to perform a switching action to release the switching assembly 5, and does not need to continuously press the switching assembly 5. After irrigation is completed, the operator closes the water source, and the water pressure in the accommodating cavity 12 disappears. Under the action of the rebound force of the elastic member 4, the spool 3 slides backward, and the third water inlet 31 is reconnected to the outer conical surface of the valve needle 2, without the need to pull the switching assembly 5, and the operation is convenient. It should be noted that if the operator needs to switch from the second working state to the first working state, the switching assembly 5 still needs to be pulled back to perform a switching action.

[0027] The working principle of the present application is that the water pressure is adjusted through the cooperation of the spool 3 and the valve needle 2, and different water outlet modes are changed by manually pushing the switching assembly 5 to drive the spool 3, so as to adapt to different use scenarios.

[0028] Specifically, the water source is opened, and high-pressure water enters the accommodating cavity 12 from the first water inlet 11. Under the water pressure, the spool 3 slides forward against the elastic force to enter the low-pressure irrigation state (first working state): the third water outlet 33 of the spool 3 is moved to be connected to the irrigation water cavity 121, and the fourth water outlet 34 is blocked by the annular partition 13. At the same time, a small annular gap is formed between the third water inlet 31 of the spool 3 and the conical surface of the valve needle 2, and the water flow path is as follows: first water inlet 11→ third water inlet 31→ throttling pipe 32→ third water outlet 33→ irrigation water cavity 121→ first water outlet 14, at this time the water pressure and the rebound force are balanced, and the device is in a stable first working state to irrigate flowers.

[0029] After watering, the hand-operated switching assembly 5 pushes the valve core 3 to move forward a little bit, so as to separate the valve core 3 and the valve needle 2 completely, and enter the high-pressure spraying state (the second working state), and the throttling effect disappears; meanwhile, the fourth water outlet 34 moves to the position and is connected with the second water inlet 131 on the annular separation part 13; the water flow path is as follows: the first water inlet 11→the third water outlet 31→the throttling pipeline 32→the fourth water outlet 34→through the second water inlet 131→the spraying water cavity 122→the second water outlet 15, which sprays the ground or irrigates the trees at high speed.

[0030] As shown in Figures 1 to 4 Preferably, the shell 1 is further provided with an annular blocking part 16, which is arranged in the watering water cavity 121, so as to close the third water outlet 33 when the valve core 3 is switched to the second working state. When the valve core 3 moves to the second working state (the high-pressure spraying state) under the driving of the switching assembly 5, the third water outlet 33 of the valve core 3 moves forward with the valve core 3 and finally is radially aligned with the annular blocking part 16, the annular blocking part 16 abuts against and closes the third water outlet 33, so as to cut off the communication between the third water outlet 33 and the watering water cavity 121, ensure that the water flow entering the throttling pipeline 32 can only pass through the fourth water outlet 34 and the second water inlet 131 to enter the spraying water cavity 122, and finally is sprayed by the second water outlet 15, so as to maximize the pressure of the spraying water flow.

[0031] As shown in Figures 1 to 4 Preferably, the shell 1 is further provided with an annular limiting part 17, which is arranged in the accommodating cavity 12; The valve core 3 abuts against the annular limiting portion 17 to form a pressure regulating cavity 123 with the shell 1, and the annular limiting portion 17, the inner wall of the front end of the accommodating cavity 12, the inner wall of the accommodating cavity 12 and the side wall of the valve core 3 jointly form a closed pressure regulating cavity 123. The outer wall of the valve core 3 is provided with an annular flange 35, and the outer peripheral wall of the valve core 3 is integrally provided with the annular flange 35, which is located at the position close to the front end of the valve core 3. The annular flange 35 is arranged in the pressure regulating cavity 123, and the annular flange 35 abuts against the side of the annular limiting portion 17 away from the first water inlet 11. When the valve core 3 moves forward and backward in the accommodating cavity 12, the annular flange 35 moves forward and backward in the pressure regulating cavity 123. The valve core 3 is also provided with a fifth water outlet 36, and the throttle pipe 32, the fifth water outlet 36 and the pressure regulating cavity 123 are sequentially communicated. When the device is in the first working state (low-pressure irrigation), part of the water flow passes through the throttle pipe 32, most of the flow enters the irrigation water cavity 121 from the third water outlet 33, and a small part of the flow enters the pressure regulating cavity 123 through the fifth water outlet 36. The water pressure in the pressure regulating cavity 123 acts on the end face of the annular flange 35 of the valve core 3, forming an additional pressure opposite to the direction of the water flow (i.e. pointing to the direction of the first water inlet 11). The additional pressure and the elastic force of the elastic member 4 jointly act on the annular gap between the third water inlet 31 and the valve needle 2 to strictly control the size of the annular gap, avoid the annular gap being too large, thereby enhancing the stability of the irrigation water flow in the first working state and avoiding the impact on the flowers.

[0032] As shown in Figures 1 to 4 Preferably, the third water outlet 33 simultaneously extends away from the axis of the valve core 3 and away from the first water inlet 11. Specifically, the third water outlet 33 starts from the inner end connected with the throttle pipe 32, and simultaneously extends away from the central axis of the valve core 3 (radially outward) and away from the first water inlet 11 (axially towards the front end of the shell 1), and finally penetrates through the outer side wall of the valve core 3; in the first working mode, the water flow is sprayed from the third water outlet 33, and the reaction force of the jet flow is directed towards the first water inlet 11, thereby further pushing the valve core 3 backward in cooperation with the elastic force of the elastic member 4 and the additional pressure of the pressure regulating cavity 123, to avoid the throttle failure caused by excessive water pressure in the first working state.

[0033] As shown in Figures 1 to 4As shown, preferably, the fourth outlet 34 extends simultaneously in a direction away from the axis of the valve core 3 and in a direction away from the first inlet 11. Specifically, the third outlet 33 starts from the end connected to the inner wall of the valve core 3 and extends obliquely in a direction away from the central axis of the valve core 3 (radially outward) and away from the first inlet 11 (axially towards the front end of the housing 1), finally connecting to the throttling pipe 32; in the second working mode, the water flow entering the second inlet 131 from the fourth outlet 34 has a jet reaction force away from the first inlet 11, thereby working in conjunction with the water flow force to further push the valve core 3 forward, thereby more stably locking the valve core 3 in the second working state and maintaining the stability of high-pressure jetting.

[0034] like Figures 1 to 4 As shown, preferably, there are multiple first water outlets 14. Some of the first water outlets 14 are distributed at intervals around the axis of the housing 1, and some of the first water outlets 14 are distributed at intervals along the length direction of the housing 1. A portion of the first water outlets 14 are arranged in a ring around the central axis of the housing 1 to ensure the circumferential coverage of the irrigation water flow; the other portion of the water outlets are distributed at certain intervals along the length direction of the housing 1 to increase the diffusion range of the irrigation water flow.

[0035] like Figures 1 to 4 As shown, preferably, the outer wall of the housing 1 is provided with a positioning groove 18, which is recessed inward from the outer wall of the housing 1 but does not penetrate through the outer wall of the housing 1; the switching assembly 5 includes a wrench 51 and a connecting rod 52, the wrench 51 is hinged to the positioning groove 18 by a rotating shaft, one end of the connecting rod 52 is linked to the rotating shaft, the wrench 51 is hinged to the housing 1 by a rotating shaft that penetrates the two side walls of the positioning groove 18 laterally, so that the wrench 51 can swing back and forth in the positioning groove 18 with the rotating shaft as the center, and the other end of the connecting rod 52 is connected to the outer wall of the valve core 3. One end of the transmission link 52 is fixedly connected to the rotating shaft through an eccentric structure or a linkage structure, thereby converting the rotational motion of the wrench 51 into the planar motion of the link 52; the other end of the link 52 extends into the receiving cavity 12 and is connected to the outer wall of the valve core 3 through a hinge or slider mechanism; when the operator pulls the wrench 51, the valve core 3 can be moved back and forth through the link 52 to complete the switching between the first working state and the second working state.

[0036] like Figures 1 to 5As shown, preferably, the handheld auxiliary irrigation device for a sanitation sprinkler truck further includes a sprinkler cover 6. The sprinkler cover 6 is movably installed on the first water outlet 14 and closes the spray water chamber 122. The sprinkler cover 6 is installed at the front end of the housing 1 to cover and close the area of ​​the second water outlet 15 of the spray water chamber 122. The sprinkler cover 6 has a sixth water outlet 61 and a seventh water outlet 62. The sixth water outlet 61 is a normally open channel. The spray water chamber 122, the sixth water outlet 61, and the external environment are connected in sequence. The spray water chamber 122 is always connected to the external environment through the sixth outlet. The spray water chamber 122 is connected to the seventh water outlet 62. The seventh water outlet 62 is connected to the external environment when the sprinkler cover 6 is driven away from the first water outlet 14 by hand, or it is closed in the housing 1 when it is close to the first water outlet 14. As a preferred design, the seventh water outlet 62 has a fan-shaped surface and is an adjustable channel. Its on / off state depends on the position of the sprinkler cover 6. When the sprinkler cover 6 is manually rotated or pulled away from the housing 1 (i.e., away from the first water outlet 14), the seventh water outlet 62 opens, connecting with the external environment and forming an additional water outlet path; when the sprinkler cover 6 is tightened or pushed back into the housing 1 (i.e., closer to the first water outlet 14), the seventh water outlet 62 is sealed by the corresponding sealing surface of the housing 1. It can be understood that in high-pressure jet mode, the sixth water outlet 61 sprays a water column upwards, and the seventh water outlet 62 sprays a fan-shaped water surface downwards, which can simultaneously irrigate trees at higher elevations and clean the ground.

[0037] like Figures 1 to 5 As shown, preferably, the sprinkler cover 6 has an external threaded section 63, and the side wall of the spray water chamber 122 has an internal threaded section 19, with the external threaded section 63 engaging with the internal threaded section 19. In the second working state, the water pressure is higher, and the threaded connection helps to lock the sprinkler cover 6 onto the housing 1, preventing it from detaching from the housing 1 under the impact of high-pressure water flow.

[0038] like Figures 1 to 5 As shown, preferably, the handheld auxiliary irrigation device for a sanitation sprinkler truck further includes a plug 7, which is used to close the sixth water outlet 61. The operator can flexibly adjust the water output mode according to actual operational needs: when both the sixth water outlet 61 and the seventh water outlet 62 are opened simultaneously, trees can be sprayed and the ground cleaned at the same time, improving irrigation efficiency; when the plug 7 is used to close the sixth water outlet 61 while only the seventh water outlet 62 remains open, all high-pressure water will be concentrated and sprayed out from the seventh water outlet 62, forming a jet with higher water pressure and stronger impact, effectively removing stubborn stains from the ground.

[0039] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Also, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0040] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0041] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A handheld auxiliary irrigation device for sanitation sprinkler trucks, characterized in that, include: The housing (1) has a first inlet (11), a receiving cavity (12), an annular partition (13), a first outlet (14), and a second outlet (15); the annular partition (13) divides the receiving cavity (12) into an irrigation water chamber (121) and a spray water chamber (122); the first outlet (14) is connected to the irrigation water chamber (121); the annular partition (13) is provided with a second inlet (131); the irrigation water chamber (121) is connected to the spray water chamber (122) through the second inlet (131); the spray water chamber (122) is connected to the second outlet (15). Valve needle (2), the valve needle (2) is installed at the connection between the first water inlet (11) and the accommodating cavity (12), and the outer diameter of the valve needle (2) gradually decreases in the direction away from the first water inlet (11); The valve core (3) is located in the accommodating cavity (12) and slides against the inner wall of the accommodating cavity (12). The valve core (3) has a third inlet (31), a throttling pipe (32), a third outlet (33), and a fourth outlet (34). The valve core (3) is sleeved on the valve needle (2). An elastic element (4) is connected between the valve core (3) and the valve needle (2). The elastic element (4) has a tendency to drive the valve needle (2) to move closer to block the third inlet (31). The third inlet (31) is connected to the throttling pipe (32) in sequence. The third outlet (33), the throttling pipe (32), and the fourth outlet (34) are connected in sequence along the radial direction close to the valve core (3). The third outlet (33) and the fourth outlet (34) are distributed at intervals along the direction close to the first inlet (11). When the valve core (3) needs to be switched to the first working state, the water flow pushes the valve core (3) to move away from the first water inlet (11) and fits onto the outside of the annular partition (13) until the valve needle (2) opens the third water inlet (31) so that the first water inlet (11), the third water inlet (31), the throttling pipe (32), the third water outlet (33), the irrigation water chamber (121) and the first water outlet (14) are connected in sequence; A switching component (5) is installed on the housing (1) and is drivenly connected to the valve core (3); When the valve core (3) needs to be switched to the second working state, the switching component (5) drives the valve core (3) to move away from the first water inlet (11) so that the first water inlet (11), the third water inlet (31), the throttling pipe (32), the fourth water outlet (34), the second water inlet (131), the jet water chamber (122) and the second water outlet (15) are connected in sequence.

2. The handheld auxiliary irrigation device for a sanitation sprinkler truck according to claim 1, characterized in that: The housing (1) is also provided with an annular blocking part (16), which is located in the water-filling chamber (121) so that when the valve core (3) switches to the second working state, the annular blocking part (16) closes the third outlet (33).

3. The handheld auxiliary irrigation device for a sanitation sprinkler truck according to claim 1, characterized in that: The housing (1) is also provided with an annular limiting part (17). The valve core (3) moves against the annular limiting part (17) so that the valve core (3) and the housing (1) enclose a pressure regulating cavity (123); the outer wall of the valve core (3) is provided with an annular flange (35), the annular flange (35) is provided in the pressure regulating cavity (123), and the annular flange (35) abuts against the side of the annular limiting part (17) away from the first water inlet (11); the valve core (3) is also provided with a fifth water outlet (36), and the throttling pipe (32), the fifth water outlet (36) and the pressure regulating cavity (123) are connected in sequence.

4. The handheld auxiliary irrigation device for a sanitation sprinkler truck according to claim 3, characterized in that: The third outlet (33) extends both in a direction away from the axis of the valve core (3) and in a direction away from the first inlet (11).

5. A handheld auxiliary irrigation device for a sanitation sprinkler truck according to claim 3, characterized in that: The fourth outlet (34) extends both away from the axis of the valve core (3) and away from the first inlet (11).

6. The handheld auxiliary irrigation device for a sanitation sprinkler truck according to claim 1, characterized in that: The first water outlet (14) has multiple outlets, some of which are distributed at intervals around the axis of the housing (1), and some of which are distributed at intervals along the length of the housing (1).

7. The handheld auxiliary irrigation device for a sanitation sprinkler truck according to claim 1, characterized in that: The outer wall of the housing (1) is provided with a positioning groove (18). The switching assembly (5) includes a wrench (51) and a connecting rod (52). The wrench (51) is hinged to the positioning groove (18) through a rotating shaft. One end of the connecting rod (52) is linked to the rotating shaft, and the other end of the connecting rod (52) is connected to the outer wall of the valve core (3).

8. The handheld auxiliary irrigation device for a sanitation sprinkler truck according to claim 1, characterized in that: The handheld auxiliary irrigation device for a sanitation sprinkler truck also includes a sprinkler cover (6), which is movably installed on the first water outlet (14) and closes the spray water chamber (122). The sprinkler cover (6) is provided with a sixth water outlet (61) and a seventh water outlet (62). The spray water chamber (122), the sixth water outlet (61) and the external environment are connected in sequence. The spray water chamber (122) is connected to the seventh water outlet (62). The seventh water outlet (62) is connected to the external environment when the sprinkler cover (6) is driven away from the first water outlet (14) by hand, or close to the first water outlet (14) and closed in the housing (1).

9. A handheld auxiliary irrigation device for a sanitation sprinkler truck according to claim 8, characterized in that: The sprinkler cover (6) is provided with an external thread section (63), and the side wall of the spray water chamber (122) is provided with an internal thread section (19). The external thread section (63) and the internal thread section (19) are screwed together.

10. A handheld auxiliary irrigation device for a sanitation sprinkler truck according to claim 8, characterized in that: The handheld auxiliary irrigation device for a sanitation sprinkler truck also includes a plug (7), which is used to seal the sixth water outlet (61).

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