Filter structure of spray gun

Abstract

The technical scheme belongs to the technical field of agricultural spray guns, and particularly relates to a spray gun filtering structure which comprises a handle and a gun core arranged in the handle, a water flowing channel is arranged in the gun core and comprises a liquid inlet used for receiving water and a liquid outlet used for outputting the water, a pipe connector is arranged at the liquid inlet end of the gun core, and the pipe connector is connected with the gun core. A liquid inlet cavity is formed in the liquid inlet end of the water passing flow channel, a filter element is arranged in the liquid inlet cavity, one end of the filter element is communicated with the pipe connector, liquid can be filtered by the filter element before entering the liquid inlet cavity, impurities in the liquid can be effectively intercepted and removed through a fine filtering structure, the filtered liquid is allowed to pass through, and the filtering effect is good. Therefore, the risk of blockage of the liquid conveying pipeline is reduced, and the use stability and convenience of the spray gun are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural spray guns, and in particular to a spray gun filter structure. Background Art

[0002] An agricultural spray gun is a type of spraying equipment specifically used in agricultural production. It sprays pesticides, fertilizers, plant growth regulators or other liquids onto crops efficiently and evenly. It usually has adjustable spray patterns, spray angles and spray volumes to suit the needs of different crops and growth stages.

[0003] For example, Chinese patent CN208030094U discloses a handheld pesticide spray gun, which includes a spray gun rod body, a spray gun handle body, a connecting mechanism, and a threaded adjustment handle. An arc wrench is movably installed on the connecting mechanism, one end of which is connected to the spray gun rod body, and the other end is connected to the threaded adjustment handle. One end of the spray gun rod body is connected to a connecting pipe, and the connecting pipe is connected to a dosing cavity pipe, which is installed with a regulator, and the regulator is connected to a dosing pipe, and the interior of the dosing cavity pipe is connected to a dosing hose; a spray head is detachably installed at one end of the spray gun rod body through a thread, and the spray head includes a threaded rod, which is threadedly installed in the spray gun rod body, a polygonal plate body is installed at one end of the threaded rod, a door-type bracket is installed at one end of the polygonal plate body, a spray disc body is installed on the door-type bracket, and the spray disc body is connected to the interior of the spray gun rod body through a pipeline.

[0004] The above-mentioned handheld pesticide spray gun currently has a water inlet channel in the spray gun handle body, and a water pipe is connected to the lower end of the spray gun handle body to realize water introduction. Since the flow channel of the internally connected infusion pipeline is relatively thin, after long-term use, impurities in the water accumulate and easily block the flow channel, requiring frequent disassembly and cleaning, which is cumbersome to clean and inconvenient to use, and needs to be improved. Summary of the Invention

[0005] In order to improve the problem that the thin infusion pipeline is easily clogged by impurities and causes trouble in use, this technical solution provides a spray gun filtering structure.

[0006] The purpose of this technical solution is achieved in this way:

[0007] A spray gun filtering structure includes a handle and a gun core arranged in the handle, a water flow channel is provided inside the gun core, the water flow channel includes a liquid inlet for receiving water and a liquid outlet for outputting water, a pipe joint is provided at the liquid inlet end of the gun core, a liquid inlet cavity is provided at the liquid inlet end of the water flow channel, a filter element is provided in the liquid inlet cavity, and one end of the filter element is connected to the pipe joint.

[0008] Through the above technical solution, when the spray gun filtering structure is used normally, the handle is assembled on the outside of the gun core, and its shape is suitable for one-handed holding. The gun core has a built-in water inlet channel for liquid circulation, and is divided into a liquid inlet and a liquid outlet. The liquid supply pipe is tightly connected to the pipe joint, and the output liquid enters the liquid inlet cavity after passing through the pipe joint. Based on the pipe joint connected to one end of the filter element, the liquid will be filtered by the filter element before entering the liquid inlet cavity. Its fine filtering structure can effectively intercept and remove impurities in the water, allowing the filtered liquid to pass through, and then flow into the water flow channel and then be sprayed out, reducing the risk of blockage of the infusion pipeline, and improving the stability and convenience of using the spray gun.

[0009] Preferably, the filter element has a filter cavity, and the pipe joint is provided with a flow hole, which is arranged in alignment with the filter cavity, so that the introduced water can be output into the liquid inlet cavity after passing through the flow hole and the filter cavity.

[0010] Through the above technical solution, the filter cavity inside the filter element forms an independent filter space, which can more effectively accommodate and filter out impurities in the water, so that the impurities are trapped in the filter cavity. The flow hole of the pipe joint is aligned with the filter cavity of the filter element to form a docking channel, ensuring the normal circulation of water.

[0011] Preferably, the filter element has an abutment portion, which is arranged at the end of the filter element close to the liquid inlet. The abutment portion is provided with a plurality of clearance grooves. When the abutment portion abuts against the inner wall of the liquid inlet cavity, the clearance groove forms a gap for the water liquid to pass through.

[0012] Through the above technical solution, when the filter element is installed into the liquid inlet chamber of the gun core, the abutment portion needs to be set against the inner wall of the liquid inlet chamber to reduce the risk of loosening and detaching from the pipe joint due to the continuous impact force of the flow on the filter element. The filtered water enters the liquid chamber from the side of the filter element, but due to the abutment, the abutment portion will block the water at the liquid inlet, so that the flow volume is greatly reduced or completely cut off. By providing a clearance groove to provide sufficient flow space for the water, the gap formed allows the water to pass smoothly, thereby ensuring smooth and unobstructed flow.

[0013] Preferably, the pipe joint comprises a joint section, a limiting section and a connecting section, wherein the limiting section is protrudingly arranged between the outer wall of the joint section and the outer wall of the connecting section;

[0014] The joint section has an external threaded portion, and an internal threaded portion is correspondingly provided along the inner wall of the end of the liquid inlet cavity facing outward away from the liquid inlet, so that the joint section can be threadedly connected to the liquid inlet cavity.

[0015] Through the above technical solution, a pipe joint is composed of a joint section, a limiting section and a connecting section arranged in sequence, which has different functions. The cross-sectional area of the joint section is adapted to the channel cross-section of the opening end of the liquid inlet chamber, and the external threaded portion is also adapted to the internal threaded portion corresponding to the inner wall, so that the pipe joint is threadedly connected to the opening end of the liquid inlet chamber through the joint section to achieve a fixed connection with the gun core, thereby improving the convenience and stability of the connection.

[0016] Preferably, the filter element further comprises a fixing portion, which is provided at the other end of the filter element away from the abutting portion;

[0017] The joint section is provided with a thread groove 1, and the filter element is threadedly connected to the thread groove 1 by the fixing portion so as to be fixed therein, so that a gap is left between the abutting portion and the liquid inlet.

[0018] Through the above technical solution, the filter element is fixed to the pipe joint by being threadedly connected to the thread groove through the fixing part. The structural strength of the threaded connection is greater, so that it can better withstand the impact force of the water flow, and the tightness of the threaded connection is better. Since the connection method is more stable, an additional gap can be left for the filter element relative to the liquid inlet, further optimizing the fluidity of the water. When the filter element needs to be replaced, the user only needs to rotate it along the thread to easily remove it from the pipe joint and replace it with a new filter element, which simplifies the complexity and difficulty of maintenance operations.

[0019] Preferably, the connecting section is provided with a second thread groove, which is located on the end surface of the connecting section away from the first thread groove and is used for threaded connection of pipe fittings.

[0020] Through the above technical solution, a threaded structure is provided in the thread groove 2, and a water supply pipe fitting compatible with the threaded structure can be threadedly connected in the thread groove 2. The tightness of the threaded connection helps to improve the sealing performance and enhance the connection stability, and it is suitable for connection with more types of other pipe fittings, thereby expanding its scope of use and applicability.

[0021] Preferably, the pipe joint is provided with a sealing ring, and the sealing ring is sleeved on the joint section;

[0022] When the joint section is connected to the liquid inlet cavity, the sealing ring is tightly pressed between the limiting section and the gun core.

[0023] Through the above technical solution, the sealing ring is sleeved on the joint section of the pipe joint. The sealing ring is made of a material that is wear-resistant, corrosion-resistant and has good elasticity. When the joint section of the pipe joint is inserted into the liquid cavity and is ready to be connected to the gun core, as the pipe joint is further tightened, the sealing ring will be compressed and pressed tightly between the limiting section and the gun core. The sealing ring elastically deforms to fill the gap in the connection area, forming an effective sealing barrier, thereby improving the sealing performance.

[0024] Compared with the existing technology, this technical solution has the following outstanding and beneficial technical effects:

[0025] 1. This technical solution installs a gun core in the handle. The gun core has a built-in water inlet channel for liquid circulation and is divided into a liquid inlet and a liquid outlet. The liquid supply pipe is tightly connected to the pipe joint. The output liquid enters the liquid inlet chamber after passing through the pipe joint and the filter element, intercepting and filtering impurities in the water, reducing clogging, and improving the stability and convenience of the spray gun.

[0026] 2. This technical solution fixes the filter element to the pipe joint by threading the fixing part into the thread groove. The threaded connection has greater structural strength, making it better able to withstand the impact of water flow, and the connection method is more stable. It leaves an additional gap between the filter element and the liquid inlet, further optimizing the fluidity of the water and making replacement more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0028] Figure 2 This is a partial explosion diagram of this embodiment;

[0029] Figure 3 A schematic diagram of a partial explosion of a filter element in an embodiment;

[0030] Figure 4 It is a partial cross-sectional schematic diagram of this embodiment.

[0031] Figure numerals: 1. handle; 2. gun core; 3. water flow channel; 4. liquid inlet; 5. liquid outlet; 6. pipe joint; 61. joint section; 62. limiting section; 63. connecting section; 7. liquid inlet chamber; 8. filter element; 9. filter chamber; 10. flow hole; 11. external threaded portion; 12. internal threaded portion; 13. fixing portion; 14. thread groove one; 15. thread groove two; 16. sealing ring; 17. abutting portion; 18. clearance groove. DETAILED DESCRIPTION

[0032] The specific implementation of the technical solution is further described in detail below with reference to the accompanying drawings.

[0033] Example:

[0034] See also Figure 1 A spray gun filter structure includes a handle 1. The shape of the handle 1 is designed to be compatible with the holding posture of the human body. A gun core 2 is provided in the handle 1, and its shape matches the internal space of the handle 1.

[0035] See also Figure 2 and Figure 4A water flow channel 3 is provided inside the gun core 2, and a liquid inlet 4 and a liquid outlet 5 are formed at both ends along the inside of the gun core 2, corresponding to the inlet for water to flow in and the outlet for water to flow out, respectively. Among them, the liquid inlet 4 is located at the lower end of the gun core 2.

[0036] A liquid inlet cavity 7 is provided at the liquid inlet 4 end of the water flow channel 3, the upper end of which is communicated with the water flow channel 3. Since its cross-sectional area is larger than that of the water flow channel 3, a larger space is provided in the cavity for flow. The liquid inlet end of the gun core 2 is provided with a pipe joint 6, which includes a joint section 61, a limiting section 62 and a connecting section 63 connected in sequence. The limiting section 62 is connected between the joint section 61 and the connecting section 63, and protrudes between the outer wall of the joint section 61 and the outer wall of the connecting section 63.

[0037] The pipe joint 6 is threadedly connected to the liquid inlet chamber 7 to be fixed to the gun core 2. The specific threaded connection method is that an internal threaded portion 12 is provided at the outer port of the liquid inlet chamber 7 away from the liquid inlet port 4, which is arranged circumferentially along the inner wall of the liquid inlet chamber 7. The joint section 61 is provided with an external threaded portion 11 along the outer circumferential wall. The thread diameter size of the external threaded portion 11 is adapted to that of the internal threaded portion 12, so that the external threaded portion 11 and the internal threaded portion 12 cooperate to be threadedly connected.

[0038] The pipe joint 6 is provided with a sealing ring 16, which is preferably made of rubber and is sleeved on the joint section 61. When the joint section 61 is connected to the liquid inlet chamber 7, the sealing ring 16 is tightly pressed between the limiting section 62 and the gun core 2, playing the role of waterproof sealing after deformation.

[0039] The connecting section 63 is provided with a second thread groove 15 , which is located at the end surface of the connecting section 63 away from the limiting section 62 , and a thread structure is provided along the inner wall for threaded connection with an adapted pipe fitting.

[0040] See also Figure 3 and Figure 4 A filter element 8 is provided in the liquid inlet cavity 7. The filter element 8 has a filter cavity 9, and its cavity opening faces the side of the pipe joint 6. The pipe joint 6 is correspondingly provided with a flow hole 10, which is arranged in alignment with the filter cavity 9, so that the introduced water can be output into the liquid inlet cavity 7 after passing through the flow hole 10 and the filter cavity 9. In this process, the filter element 8 filters the input water.

[0041] The end of the filter element 8 close to the liquid inlet 4 has an abutment portion 17, which is provided with a plurality of makeshift grooves 18, the number of which is limited to four. The four makeshift grooves 18 are evenly distributed along the axial direction. The abutment portion 17 can abut against the inner wall of the liquid inlet cavity 7. At this time, the makeshift groove 18 forms a gap for the water to pass through. In this embodiment, a gap is left between the abutment portion 17 and the liquid inlet 4, and the gap is enlarged to further optimize the smoothness of the water flow.

[0042] The filter element 8 is threadedly connected to the pipe joint 6. The specific threaded connection method is that the filter element 8 has a fixing portion 13, which is arranged at the end of the filter element 8 away from the other end of the abutment portion 17. The fixing portion 13 is provided with a threaded structure along the outer peripheral wall, and the joint segment 61 is provided with a thread groove 14, which is located on the side end face of the joint segment 61 away from the thread groove 2 15, and a threaded structure compatible with the fixing portion 13 is provided along the inner peripheral wall, so that the fixing portion 13 is threadedly connected to the thread groove 14 to achieve connection and fixation.

[0043] The specific working process of this program is as follows:

[0044] The present technical solution is to thread the filter element 8 into the thread groove 14 of the joint section 61 through the fixing portion 13 so as to fix it to the pipe joint 6. The joint section 61 is provided with a sealing ring 16. The pipe joint 6 is threadedly connected to the liquid inlet cavity 7 of the liquid inlet end of the gun core 2 through the external threaded portion 11 of the joint section 61, so that the filter element 8 is built into the liquid inlet cavity 7, and a certain gap is left between the filter element 8 and the liquid inlet port 4. The water supply pipe is threadedly connected to the thread groove 2 15 of the connecting section 63 so as to fix it to the pipe joint 6. The water supply pipe outputs water, and the water enters the filter cavity 9 after passing through the flow hole 10. After being filtered by the filter element 8, it enters the liquid inlet cavity 7, and then continues to flow through the liquid inlet port 4 along the water flow channel 3 to the liquid outlet 5 until it is sprayed out for use. The liquid will be filtered by the filter element 8 before entering the liquid inlet cavity 7, effectively intercepting and removing impurities in the water, allowing the filtered liquid to pass through, reducing the risk of blockage of the infusion pipeline, and improving the stability and convenience of the use of the spray gun.

[0045] The above shows and describes the basic principles and main features of the present technical solution and the advantages of the present technical solution. Those skilled in the art should understand that the present technical solution is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present technical solution. Various changes and improvements may be made to the present technical solution without departing from the spirit and scope of the present technical solution. Such changes and improvements fall within the scope of the present technical solution for which protection is sought. The scope of protection claimed by the present technical solution is defined by the appended claims and their equivalents.

Claims

1. A spray gun filter structure, comprising a handle (1) and a gun core (2) disposed in the handle (1), wherein a water flow channel (3) is provided inside the gun core (2), and the water flow channel (3) includes a liquid inlet for receiving water and a liquid outlet for outputting water, characterized in that: The liquid inlet end of the gun core (2) is provided with a pipe joint (6), and the liquid inlet end of the water flow channel (3) is provided with a liquid inlet cavity (7), a filter element (8) is provided in the liquid inlet cavity (7), and one end of the filter element (8) is connected to the pipe joint (6).

2. The spray gun filter structure according to claim 1, characterized in that: The filter element (8) has a filter cavity (9), and the pipe joint (6) is provided with a flow hole (10) which is arranged in alignment with the filter cavity (9) so that the introduced water can pass through the flow hole (10) and the filter cavity (9) and then be output into the liquid inlet cavity (7).

3. The spray gun filter structure according to claim 1, characterized in that: The filter element (8) has an abutment portion (17) which is arranged at the end of the filter element (8) close to the liquid inlet. The abutment portion (17) is provided with a plurality of relief grooves (18). When the abutment portion (17) abuts against the inner wall of the liquid inlet cavity (7), the relief grooves (18) form gaps for the water to pass through.

4. The spray gun filter structure according to claim 3, characterized in that: The pipe joint (6) comprises a joint section (61), a limiting section (62) and a connecting section (63), wherein the limiting section (62) is protrudingly arranged between the outer wall of the joint section (61) and the outer wall of the connecting section (63); The joint section (61) has an external threaded portion (11), and an internal threaded portion (12) is correspondingly provided along the inner wall of the end of the liquid inlet cavity (7) away from the liquid inlet, so that the joint section (61) can be threadedly connected to the liquid inlet cavity (7).

5. The spray gun filter structure according to claim 4, characterized in that: The filter element (8) further comprises a fixing portion (13), which is arranged at the other end of the filter element (8) away from the abutting portion (17); The joint section (61) is provided with a thread groove (14), and the filter element (8) is threadably connected to the thread groove (14) through the fixing portion (13) and fixed therein, so that a gap is left between the abutting portion (17) and the liquid inlet.

6. The spray gun filter structure according to claim 5, characterized in that: The connecting section (63) is provided with a second thread groove (15), which is located on the end surface of the connecting section (63) away from the first thread groove (14) and is used for threaded connection of pipe fittings.

7. The spray gun filter structure according to claim 4, characterized in that: The pipe joint (6) is provided with a sealing ring (16), and the sealing ring (16) is sleeved on the joint section (61); When the joint section (61) is connected to the liquid inlet chamber (7), the sealing ring (16) is pressed tightly between the limiting section (62) and the gun core (2).

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