powder spray pump

Abstract

The present application relates to a kind of powder spraying pump, it is to solve the poor sealing of the piston cavity in the big circle of the existing similar products, it is more difficult to ensure the stability of the process of air intake and air outlet, the effect of powder spraying and mixing effect is poor, leading to the technical problem of inconvenient production and assembly.The gist is that the piston of the powder spraying pump is below the main body of closed air chamber, the main body of the bottom of air chamber is provided with one-way valve, the main body of the middle of air chamber is provided with the valve rod sleeve that is upwardly protruding, the outer diameter of sleeve opening of the valve rod sleeve of main body is inserted into the inner diameter of valve rod at the same time, the inner diameter of sleeve opening of the valve rod sleeve of main body is provided with the sealing rod that is inserted at one end, and is provided with clearance channel, the taper head of the other end of sealing rod is limited in the air outlet cavity of the top of valve rod;Between the inner diameter of valve rod in valve rod and the outer diameter of sealing rod, air outlet channel is arranged, the outer diameter of valve rod between valve rod and inner plug, and the valve rod that extends inner plug is provided with air intake rib, the outer diameter of piston and valve rod buckling connection is provided with air intake groove and floating clearance, and compressed gas mixed powdery particles enter the main body by suction tube.

Description

Technical Field

[0001] The invention relates to a powder spraying device, in particular to a powder spraying pump. Background Art

[0002] A powder spray pump is a container that extracts powder from an enclosed space. By pumping air in and out, it creates a continuous vacuum or negative pressure within the enclosed space, creating a slight positive pressure at the outlet, and spraying the powder out of the container. The structure and operating principle of this type of powder spray pump are described in Chinese patent application number 202021089750.8, published on May 18, 2021, under the utility model title "New Powder Spray Bottle." The powder spray bottle comprises a large ring, a discharge rod, a valve stem, a spring, a piston, and a cap. The large ring is provided with a piston chamber with an open bottom. The outer diameter of the valve stem within the piston chamber is provided with a piston. Spiral grooves are symmetrically arranged on either side of the top of the valve stem's central hole, and a movable sealing valve is located within the top of the valve stem's central hole. Another example is Chinese patent application number 201920374984.8, published on January 31, 2020, under the utility model title "A Disposable Ear Powder Sprayer." The pump body of this powder sprayer is provided with an air inlet pipe connected to the extrusion chamber at the bottom. However, the sealing performance of the large inner piston cavity of the above-mentioned products and similar products is poor, making it difficult to ensure the stability of the air intake and exhaust processes, and the powder spraying and mixing effects are poor. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the present invention aims to provide a powder spray pump in the art that primarily addresses the technical problems of existing similar products, such as poor sealing of the large piston chamber within the large ring, difficulty in ensuring stable air intake and exhaust processes, poor powder spraying and mixing effects, and inconvenient production and assembly. This objective is achieved through the following technical solution.

[0004] A powder spray pump, wherein a suction tube extending through a pump core assembly is provided in the bottle body of the powder spray pump, the main body of the pump core assembly is arranged at the bottle mouth of the bottle body, a large circle is provided on the outer diameter of the main body at the bottle mouth, a valve stem extending out of the pump core assembly is connected to a head cap, and a spring is provided on the outer diameter of the valve stem extending out of the pump core assembly, one end of the spring is abutted against an inner plug at the pump mouth of the main body, and the other end of the spring is abutted against a spring rib on the outer diameter of the valve stem above the inner plug, a piston is provided on the outer diameter of the valve stem in the main body, and the cap opening at the bottom of the head cap is located in the ring opening at the top of the large circle. The key points of its structural design are that the main body below the piston is provided with a closed air chamber, and the middle body of the main body's air chamber is provided with an upwardly protruding valve stem sleeve. While the outer diameter of the sleeve at the main body's valve stem sleeve is inserted into the inner diameter of the valve stem at the piston, the inner diameter of the sleeve at the main body's valve stem sleeve is provided with a sealing rod inserted at one end, and a gap channel is provided, and the cone head at the other end of the sealing rod is limited to the air outlet cavity at the top of the valve stem; an air outlet channel is provided between the inner diameter of the valve stem and the outer diameter of the sealing rod, a one-way valve is provided at the through hole on one side of the bottom of the main body's air chamber, and air intake ribs are provided between the valve stem and the inner plug, and on the outer diameter of the valve stem extending out of the inner plug, and an air intake groove and a floating gap are provided on the outer diameter of the buckled connection between the piston and the valve stem; the valve stem and the head cap are pressed down to drive the sealing rod As the piston moves downward, the seal between the conical head of the sealing rod and the inner wall of the valve stem in the outlet cavity is converted from being sealed to being disengaged and opened. The piston on the outer diameter of the valve stem moves upward, passing through the floating gap and the compressed gas to close the air inlet groove. The one-way valve in the air chamber opens, and the compressed gas mixed with powder particles in the bottle enters the valve stem sleeve of the main body through the straw, and enters the air outlet cavity of the valve stem through the outlet channel and the gap channel, and is sprayed out from the head cap through the air outlet cavity. When the head cap is released, the spring drives the valve stem to reset. At the same time, the valve stem drives the piston to reset, the one-way valve closes, and the piston on the outer diameter of the valve stem moves downward by gravity, passing through the floating gap to open the air inlet groove. Gas enters the air chamber of the main body through the air inlet ribs and the air inlet groove of the valve stem. Therefore, this powder spray pump utilizes the compressed flow of air and is simpler than the powder spray structures currently on the market. When the cap is pressed, the valve stem and piston are simultaneously pressed downward, forcing the gas in the air chamber into the bottle body through the one-way valve. The bottle body forms a sealed, closed structure. When the sealing rod is pressed until it contacts the main body, the sealing rod opens, and the compressed gas in the bottle mixed with powdered particles is discharged out of the cap through the valve stem hole. When the cap rebounds due to the spring force, the piston rebounds to the air inlet groove of the main body, and the gas in the air chamber is refilled by the gas inlet groove of the valve stem.

[0005] A guide plug is provided on the outer diameter of the sealing rod within the valve stem. One end of the guide plug is inserted into the inner diameter of the stem sleeve of the valve body, sealing the rod. The clearance channel is provided between the inner diameter of the guide plug and the outer diameter of the sealing rod. The other end of the guide plug is locked against the inner diameter of the valve stem. This structure further improves the stability of the sealing rod within the valve stem, as well as the stability and sealing performance when the valve stem drives the sealing rod up and down.

[0006] The outer diameter between the conical head of the sealing rod and the other end is provided with a transition section smaller than the outer diameter of the two ends and the orifice diameter of the one end abutting and fixed with the inner diameter of the guide plug and the valve rod.

[0007] The top of the gas outlet cavity of the valve rod is provided with an opening, the opening of the top of the gas outlet cavity is in sealing fit with the small inner rod sleeve of the inner top of the head cap, the rod gas outlet hole of the valve rod on one side of the gas outlet cavity is aligned with the cap gas outlet hole of the head cap, and the top of the conical head of the sealing rod is provided with a flat end. The above structure facilitates the further passage of compressed gas mixed with powdery particles through the valve rod sleeve of the large ring and into the valve rod through the sealing plug.

[0008] The inner top of the head cap is provided with a protruding positioning column in the center, the large inner rod sleeve of the inner top of the head cap on the outer side is in sealing fit with the outer diameter of the top gas outlet cavity of the valve rod, the positioning column of the head cap is inserted into the gas outlet cavity of the valve rod and is provided with a gas outlet gap, the cap gas outlet hole in the head cap is exposed to the top gas outlet cavity of the valve rod and communicates with the gas outlet gap, and the top of the conical head of the sealing rod is provided with a conical groove. The above is another connection structure and mode between the head cap and the valve rod.

[0009] The gas inlet groove of the outer diameter of the connection between the piston and the valve rod is arranged at the clamping rib, and the gap of the clamping groove at the clamping rib is greater than the clamping connection gap between the piston and the valve rod, which is the floating gap. The above structure further improves the opening and closing of the gas inlet groove of the valve rod.

[0010] The orifice of the bottom of the inner plug is provided with a downward protruding gas inlet head, and the gas inlet head of the inner plug is inserted between the connection between the outer diameter of the valve rod and the inner diameter of the piston at the gas inlet groove of the valve rod. Therefore, the opening of the gas inlet groove at the floating gap is further improved and ensured.

[0011] The top of the inner plug is provided with a spring groove, and the spring rib of the valve rod is located in the cap opening of the head cap. The above structure further improves the stability of the spring and reduces the occupation of the spring space.

[0012] The bottom of the valve rod sleeve of the main body above the suction tube is provided with an abutting rib, and the abutting rib is located in the main body when the sealing rod moves downward.

[0013] The structure of the present application is simple and reasonable, has good sealing performance and stability, good powder spraying effect, good use comfort, and convenient production and assembly, and is suitable for use as a powder spraying pump and structure improvement of similar products. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is an explosive structure schematic diagram of embodiment one of the present application.

[0015] Figure 2 is Figure 1 is a cross-sectional structure schematic diagram of the initial state after assembly of

[0016] Figure 3 yes Figure 2 Schematic diagram of the sectional structure in the pressed state.

[0017] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure of the improved embodiment 2 in the initial state, in which the framed part is enlarged.

[0018] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure of the improved embodiment 3 in the initial state.

[0019] Figure 6 yes Figure 5 Schematic diagram of the explosion structure.

[0020] Serial number and name of the accompanying drawings: 1. Head cap, 2. Large circle, 3. Sealing rod, 4. Valve stem, 401. Spring rib, 402. Air intake rib, 403. Air intake groove, 5. Spring, 6. Inner plug, 7. Piston, 8. Guide plug, 9. Main body, 901. Air chamber, 902. Valve stem sleeve, 903, Counter rib, 10. One-way valve, 11. Straw, 12. Bottle body, 13. Outer cover. Implementation Method

[0021] Now, the structure and use of the present invention will be further described in conjunction with the accompanying drawings. Figure 1-Figure 3 In the illustrated embodiment 1, the bottle body 12 of the spray powder pump is provided with a suction tube 11 extending through the pump core assembly. The main body 9 of the pump core assembly is arranged at the bottle mouth of the bottle body. The outer diameter of the main body at the bottle mouth is provided with a large ring 2. The valve stem 4 extending from the pump core assembly is connected to the head cap 1. At the same time, the outer diameter of the valve stem extending from the pump core assembly is provided with a spring 5. One end of the spring abuts against the inner plug 6 at the pump mouth of the main body, and the other end of the spring abuts against the spring rib 401 on the outer diameter of the valve stem above the inner plug. The outer diameter of the valve stem in the main body is provided with a piston 7. The cap opening at the bottom of the head cap is located within the ring opening at the top of the large ring. The main body below the piston is provided with a sealed air chamber 901. The middle of the main body air chamber is provided with an upwardly protruding valve stem sleeve 902. The outer diameter of the sleeve of the main body valve stem sleeve is inserted into the inner diameter of the valve stem at the piston. At the same time, the inner diameter of the sleeve of the main body valve stem sleeve is provided with a sealing rod 3 with one end inserted therein, and a gap channel is provided. The cone head at the other end of the sealing rod is limited to the air outlet cavity at the top of the valve stem. An air outlet channel is provided between the inner diameter of the valve stem and the outer diameter of the sealing rod. A one-way valve 10 is installed in a through-hole on one side of the bottom of the main body's air chamber. Air inlet ribs 402 are provided between the valve stem and the inner plug, and on the outer diameter of the valve stem extending from the inner plug. An air inlet groove 403 and a floating clearance are provided on the outer diameter of the piston-stem connection. A guide plug 8 is provided on the outer diameter of the sealing rod within the valve stem. The sealing rod is inserted into the inner diameter of the sleeve of the main body's valve stem sleeve through one end of the guide plug and sealed. The clearance channel is provided between the inner diameter of the guide plug and the outer diameter of the sealing rod. The other end of the guide plug is fixedly engaged with the inner diameter of the valve stem.

[0022] The outer diameter of the taper head of the sealing rod is provided with a transition section between one end and the other end, which is smaller than the outer diameter of the two ends and the diameter of the orifice of the guiding plug and the inner diameter of the valve rod abutting and fixed one end. The top of the gas outlet cavity of the valve rod is provided with an opening, the opening of the top of the gas outlet cavity is in abutting and sealing engagement with the small inner rod sleeve of the inner top of the head cap, the rod gas outlet hole of the valve rod on one side of the gas outlet cavity is aligned with the cap gas outlet hole of the head cap, and the top of the taper head of the sealing rod is provided with a flat end. The intake groove of the outer diameter of the piston and the valve rod abutting connection is provided at the abutting rib, and the gap of the abutting groove at the abutting rib is larger than the abutting connection gap between the piston and the valve rod, which is the floating gap. The top of the inner plug is provided with a spring groove, and the spring rib of the valve rod is located in the cap opening of the head cap. The bottom of the valve rod sleeve of the main body above the straw is provided with an abutting rib 903, and the sealing rod moves downward and is limited in the abutting rib of the main body.

[0023] When the valve rod and the head cap of the powder spraying pump are pressed downward to drive the sealing rod and the piston to move downward, the taper head of the sealing rod in the gas outlet cavity is switched from sealing to disengagement and opening between the inner wall of the valve rod, the piston of the outer diameter of the valve rod moves upward through the floating gap and the compressed gas to close the intake groove, the one-way valve in the gas chamber is opened, the compressed gas mixed with the powdery particles in the bottle body enters the valve rod sleeve of the main body through the straw, enters the gas outlet cavity of the valve rod through the gas outlet channel and the gap channel, and is sprayed out from the head cap through the gas outlet cavity; when the head cap is loosened, the spring drives the valve rod to reset, the valve rod drives the piston to reset, the one-way valve is closed, and the piston of the outer diameter of the valve rod moves downward through the floating gap to open the intake groove by gravity, and the gas enters the gas chamber of the main body through the intake rib and the intake groove of the valve rod. The specific use is as follows: when in use, the head cap is pressed to make the valve rod drive the sealing rod and the piston, and the guiding plug in the valve rod to move vertically downward, the piston and the large circle make sealing movement in the movement process, and the outer diameter of the piston and the inner diameter of the gas chamber of the large circle make sealing movement; when the piston and the large circle make sealing movement, the internal pressure of the gas chamber of the main body is compressed, the internal pressure increases due to the compression of the gas, the one-way valve is opened under the action of the pressure, and the gas in the gas chamber can only enter the bottle body through the one-way valve, and is mixed with the powdery particles in the bottle body, and enters the valve rod sleeve of the main body through the straw, and enters the gas outlet cavity at the top of the valve rod through the gap between the sealing rod and the valve rod in the valve rod sleeve, and is discharged together with the mixed powdery particles. When the piston rebounds upward, the internal air is insufficient, the gas outside the bottle body enters the gas chamber of the main body through the gap between the valve rod and the inner plug and the gap between the piston and the valve rod, so that the internal and external air pressures are consistent.

[0024] On the basis of the structure and characteristics of the above-mentioned embodiment one, such as Figure 4In the second embodiment shown, the large circle on the outside of the head cap is provided with an outer cover 13, and the bottom valve stem hole of the inner plug is provided with a downwardly protruding air inlet head, and the air inlet head of the inner plug is inserted between the connection between the outer diameter of the valve stem and the inner diameter of the piston at the air inlet groove of the valve stem, and the sealing rod is directly inserted into the inner diameter of the sleeve at the valve stem sleeve of the main body. A raised positioning column is provided at the center of the top of the head cap, and the large inner rod sleeve at the top of the head cap outside the positioning column is sealed with the outer diameter of the air outlet cavity at the top of the valve stem. At the same time, the positioning column of the head cap is inserted into the air outlet cavity of the valve stem and is provided with an air outlet gap. The air outlet hole in the head cap exposes the air outlet cavity at the top of the valve stem and is connected with the air outlet gap. The top of the cone head of the sealing rod is provided with a conical groove. As shown Figure 5 and Figure 6 In the third embodiment shown, the guide plug is omitted in the valve stem and the abutting rib is omitted in the main body. The structural designs of the second and third embodiments described above can also achieve the same technical effects and technical objectives.

Claims

1. A powder spray pump, wherein a bottle body (12) of the powder spray pump is provided with a suction tube (11) extending through a pump core assembly, a main body (9) of the pump core assembly is arranged at the bottle mouth of the bottle body, a large ring (2) is provided on the outer diameter of the main body at the bottle mouth, a valve stem (4) extending from the pump core assembly is connected to a head cap (1), and a spring (5) is provided on the outer diameter of the valve stem extending from the pump core assembly, one end of the spring is abutted against an inner plug (6) at the pump mouth of the main body, and the other end of the spring is abutted against a spring rib (401) on the outer diameter of the valve stem above the inner plug, a piston (7) is provided on the outer diameter of the valve stem in the main body, and the cap opening at the bottom of the head cap is located within the ring opening at the top of the large ring; it is characterized in that The main body (9) below the piston (7) is provided with a sealed air chamber (901), and a valve stem sleeve (902) protruding upward is provided in the middle of the main body's air chamber. The outer diameter of the sleeve at the main body's valve stem sleeve is inserted into the inner diameter of the valve stem (4) at the piston. At the same time, the inner diameter of the sleeve at the main body's valve stem sleeve is provided with a sealing rod (3) inserted at one end, and a gap channel is provided. The cone head at the other end of the sealing rod is limited to the air outlet cavity at the top of the valve stem; an air outlet channel is provided between the inner diameter of the valve stem and the outer diameter of the sealing rod, a one-way valve (10) is provided at the through hole on one side of the bottom of the main body's air chamber, an air inlet rib (402) is provided between the valve stem and the inner plug (6), and the outer diameter of the valve stem extending out of the inner plug, and an air inlet groove (403) and a floating gap are provided at the outer diameter of the piston (7) and the valve stem. When the valve stem and the head cap are pressed downward to drive the sealing rod and the piston to move downward, the sealing between the conical head of the sealing rod and the inner wall of the valve stem in the air outlet cavity is converted to disengagement and opening, and the piston of the outer diameter of the valve stem moves upward to close the air inlet groove through the floating gap and the compressed gas, and the one-way valve in the air chamber opens. The compressed gas mixed with the powder particles in the bottle body (12) enters the valve stem sleeve of the main body through the straw (11), and enters the air outlet cavity of the valve stem through the air outlet channel and the gap channel, and is ejected from the head cap through the air outlet cavity; when the head cap is loosened, the spring drives the valve stem to reset. At the same time, the valve stem drives the piston to reset, the one-way valve is closed, and the piston of the outer diameter of the valve stem moves downward by gravity to open the air inlet groove through the floating gap, and the gas enters the air chamber of the main body through the air inlet rib and the air inlet groove of the valve stem.

2. The powder spray pump according to claim 1, characterized in that The outer diameter of the sealing rod (3) in the valve stem (4) is provided with a guide plug (8), and the sealing rod is inserted into the inner diameter of the valve stem sleeve (902) of the main body (9) through one end of the guide plug and sealed. The gap channel is provided between the inner diameter of the guide plug and the outer diameter of the sealing rod, and the other end of the guide plug is fixedly engaged with the inner diameter of the valve stem.

3. The powder spray pump according to claim 1, characterized in that The outer diameter between one end and the other end of the cone head of the sealing rod (3) is provided with a transition section that is smaller than the outer diameter of both ends and smaller than the diameter of the orifice at one end where the guide plug (8) and the inner diameter of the valve stem (4) are locked and fixed.

4. The powder spray pump according to claim 1, characterized in that The top of the air outlet cavity of the valve stem (4) is provided with an opening, and the opening at the top of the air outlet cavity is sealed with the small inner rod sleeve at the top of the head cap (1). The rod outlet hole of the valve stem on one side of the air outlet cavity is aligned with the cap outlet hole of the head cap, and the top of the cone head of the sealing rod (3) is provided with a flat end.

5. The powder spray pump according to claim 1, characterized in that A raised positioning column is provided at the center of the top inner portion of the head cap (1). The large inner rod sleeve at the top inner portion of the head cap outside the positioning column is sealed with the outer diameter of the air outlet cavity at the top of the valve stem (4). At the same time, the positioning column of the head cap is inserted into the air outlet cavity of the valve stem and an air outlet gap is provided. The air outlet hole in the head cap exposes the air outlet cavity at the top of the valve stem and communicates with the air outlet gap. A conical groove is provided at the top of the cone head of the sealing rod (3).

6. The powder spray pump according to claim 1, characterized in that The air inlet groove (403) of the outer diameter of the fastening connection between the piston (7) and the valve stem (4) is provided at the fastening rib, and the gap of the fastening groove at the fastening rib is larger than the fastening connection gap between the piston and the valve stem, which is the floating gap.

7. The powder spray pump according to claim 6, characterized in that The bottom valve stem (4) of the inner plug (6) is provided with a downwardly protruding air inlet head at the opening, and the air inlet head of the inner plug is inserted into the air inlet groove (403) of the valve stem between the connection between the outer diameter of the valve stem and the inner diameter of the piston.

8. The powder spray pump according to claim 1, characterized in that A spring groove is provided on the top of the inner plug (6), and the spring rib (401) of the valve stem (4) is located in the cap opening of the head cap (1).

9. The powder spray pump according to claim 1, characterized in that A counter rib (903) is provided at the bottom of the valve stem sleeve (902) of the main body (9) above the straw (11), and the time limit for the downward movement of the sealing rod (3) is located at the counter rib of the main body.

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