A plunger pump for a pneumatic sprayer

Abstract

The present invention discloses a plunger pump for a pneumatic sprayer, comprising a paint cylinder, a plunger stop valve mechanism located in the paint cylinder, a suction cylinder, and a suction stop valve mechanism located in the suction cylinder. The paint cylinder is provided with an insertion port, and the plunger stop valve mechanism comprises a plunger stop valve, a plunger valve stem, and a plunger stop head connected to the lower end of the plunger valve stem. The plunger stop valve is sleeved on the plunger valve stem, and the upper end of the suction cylinder is connected to the lower end of the paint cylinder. The plunger stop valve is provided with a discharge port and a feed port for discharging paint, and the plunger stop valve and the plunger stop head are in contact and sealed, and the suction stop valve mechanism comprises a suction-assisting rod, a suction stop valve, and a suction-assisting cup. The plunger pump for a pneumatic sprayer of the present invention has the function of spraying various coatings such as particles, sieves, thick-type fire-retardant coatings, and real stone paint, and solves the characteristics of difficult spraying existing at home and abroad.

Description

Technical Field

[0001] The invention belongs to the technical field of spraying equipment, and in particular relates to a plunger pump for a pneumatic spraying machine. Background Art

[0002] At present, the coating technology at home and abroad is developing rapidly, and the requirements for coating technology equipment are constantly increasing, especially the requirements for environmental protection are getting higher and higher. The current starting spray machine plunger pump has the following defects:

[0003] At present, for the specific coatings that cannot be completed by the plunger pumps of pneumatic sprayers at home and abroad: thick fire retardant coatings, high viscosity glue, real stone paint, etc., some are currently operated by extruders for extrusion spraying. Due to the heavy weight of this machine, the movement is hindered, and the motor cannot output the air source. A special air compressor is also required to assist in spraying, and only 500-700 square meters can be sprayed per day. If 1,000 square meters need to be sprayed, the extrusion parts must be replaced, otherwise the operation cannot be completed. In addition, only a portable can spray gun can be used to add it one spoonful at a time, and the air compressor can be used for air pressure spraying. Due to the large splashing mist, it will cause damage to the operator and environmental pollution. The efficiency is low and only 300-400 square meters can be sprayed per day. At present, tiles cannot be pasted on the exterior walls of high-rise buildings. The tiles will fall off and injure passers-by and parked vehicles under the high-rise buildings. Therefore, the real stone paint spraying operation is limited by time. In addition, fire retardant coatings are indispensable for military warehouses and food storage depots, such as warships, ships, and aircraft carriers. The manual painting of fire retardant coatings cannot meet the requirements. This application conducts special research and development to propose a plunger pump for pneumatic spraying machines. After testing, the spraying efficiency can reach about 2000-2500 square meters per day. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a plunger pump for a pneumatic sprayer, which has the function of spraying various coatings such as particles, sieves, thick type fire retardant coatings and real stone paint, solving the high difficulty of spraying existing at home and abroad.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: it includes a paint cylinder, a plunger stop valve mechanism located in the paint cylinder, a suction cylinder, and a suction stop valve mechanism located in the suction cylinder, the paint cylinder is provided with an insertion port, the plunger stop valve mechanism includes a plunger stop valve, a plunger valve stem and a plunger stop head connected to the lower end of the plunger valve stem, the plunger stop valve is sleeved on the plunger valve stem, the upper end of the suction cylinder is connected to the lower end of the paint cylinder, the plunger stop valve is provided with a discharge port and a feed port for discharging paint, the plunger stop valve and the plunger stop head are in contact and sealed, the suction stop valve mechanism includes an auxiliary suction rod, a suction stop valve and an auxiliary suction cup, the suction stop valve is sleeved on the outer wall of the auxiliary suction rod, the auxiliary suction cup is fixed to the lower end of the auxiliary suction rod, and the upper end of the auxiliary suction rod is threadedly connected to the plunger stop head.

[0006] Furthermore, a first sealing ring is connected to the outer sleeve of the plunger stop valve, a fixing ring for fixing the first sealing ring is threadedly connected to the outer wall of the plunger stop valve, and the plunger stop valve is slidably matched with the paint cylinder.

[0007] Furthermore, a screw hole is provided on the outer wall of the suction cylinder, and a positioning screw for limiting the movement range of the suction stop valve is threadedly connected to the inner thread of the screw hole.

[0008] Furthermore, the plunger stopper is conical, and a first key groove is provided on an outer wall of the plunger stopper.

[0009] Furthermore, the suction assisting cup is fixed to the lower end of the suction assisting rod by a nut, and the suction assisting cup includes a first iron sheet, a spacer sleeve and a second iron sheet, which are sequentially sleeved on the suction assisting rod and fixed to the lower end of the suction assisting rod by a nut.

[0010] Furthermore, the suction stop valve comprises a suction stop valve housing and a clamping cap, the suction stop valve housing is threadedly connected to the clamping cap, a second sealing ring is provided between the suction stop valve housing and the clamping cap, and a convex ring is provided on the suction stop valve housing.

[0011] Furthermore, the suction cylinder is connected to the paint cylinder via a clamp or a thread.

[0012] Furthermore, there are 4 discharge ports.

[0013] Furthermore, the plunger stopper is provided with a conical surface and a flat surface, and the conical surface or the flat surface is in contact and sealed with the plunger stop valve respectively.

[0014] The beneficial effects of the present invention are as follows: a plunger pump for a pneumatic sprayer has a long service life, good spraying effect, less aerosol paint during spraying, energy saving, low environmental pollution, easy movement, greatly improved spraying quality, and convenient spraying operations of various coatings such as particles, sieves, thick type fire retardant coatings and real stone paint. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of embodiment 1 of the present invention;

[0016] Figure 2 This is an explosion diagram of Example 1 of the present invention;

[0017] Figure 3 The suction stop valve mechanism in embodiment 1 of the present invention;

[0018] Figure 4 The plunger stop valve mechanism in embodiment 1 of the present invention;

[0019] Figure 5 A half-section view of Embodiment 1 of the present invention;

[0020] Figure 6 Embodiment 1 of the present invention Figure 5 A magnified view of part A;

[0021] Figure 7 Embodiment 1 of the present invention Figure 5 A magnified view of part B;

[0022] Figure 8 This is a schematic diagram of the plunger stop valve in Example 1 of the present invention;

[0023] Fig. 9 This is a schematic diagram of the first assembly of the plunger valve stem in Example 1 of the present invention;

[0024] Fig.10 This is a schematic diagram of the explosion of the suction stop valve in Example 1 of the present invention;

[0025] Fig.11 A three-dimensional diagram of the plunger stopper in Embodiment 1 of the present invention;

[0026] Fig.12 An exploded view of the suction cylinder and the paint cylinder in Embodiment 1 of the present invention;

[0027] Fig.13 It is an assembly diagram of the plunger stopper and the plunger valve stem in Example 2 of the present invention;

[0028] Fig.14 This is an exploded view of the suction cylinder and the paint cylinder in Example 3 of the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1-12 The present invention provides the following technical solution: a plunger pump for a pneumatic sprayer, comprising a paint cylinder 2, a plunger stop valve mechanism 3 located in the paint cylinder 2, a suction cylinder 4, and a suction stop valve mechanism 5 located in the suction cylinder 4. The paint cylinder 2 is provided with an insertion port 21, and the plunger stop valve mechanism 3 comprises a plunger stop valve 31, a plunger valve stem 32, and a plunger stop head 33 connected to the lower end of the plunger valve stem 32. The plunger stop valve 31 is sleeved on the plunger valve stem 32. The upper end of the suction cylinder 4 is connected to the The lower end of the paint cylinder 2 is connected, and the plunger stop valve 31 is provided with a discharge port 311 and a feed port 312 for discharging paint. The plunger stop valve 31 and the plunger stop head 33 are in contact and sealed. The suction stop valve mechanism 5 includes a suction-assisting rod 51, a suction stop valve 52 and a suction-assisting disc 53. The suction stop valve 52 is sleeved on the outer wall of the suction-assisting rod 51, and the suction-assisting disc 53 is fixed to the lower end of the suction-assisting rod 51. The upper end of the suction-assisting rod 51 is threadedly connected to the plunger stop head 33.

[0032] With the above structure, the insertion port 21 of the paint cylinder 2 is inserted into the pump seat, the upper end of the suction cylinder 4 is connected to the lower end of the paint cylinder 2 with internal and external threaded connections, the upper end of the suction-assisting rod 51 is threadedly connected to the plunger stop 33, and the upper end of the plunger valve rod 32 is threadedly connected to the cylinder piston rod. The cylinder is powered by an air compressor. When the cylinder is started, the piston rod of the cylinder drives the plunger valve rod 32 and the suction-assisting rod 51 to make reciprocating vertical movements, thereby driving the suction-assisting cup 53 to make reciprocating vertical movements. At this time, the suction-assisting cup 53 plays the role of stirring the paint and assisting in conveying the paint. A paint channel is reserved between the suction-assisting rod 51 and the inner wall of the suction cylinder 4 to assist in conveying the paint into the suction cylinder 4. The suction stop valve 52 is driven by air pressure to make reciprocating vertical movements in the suction cylinder 4. The reciprocating vertical movement of the suction-assisting cup 53 generates negative pressure in the suction cylinder 4, which will The paint placed in the paint tank is sucked into the suction cylinder 4. At this time, the outer diameter of the suction stop valve shell 521 is smaller than the inner diameter of the suction cylinder 4. Therefore, the sucked paint flows through the outer surface of the suction stop valve shell 521 into the suction cylinder 4, and the piston rod drives the plunger valve stem 32 to move vertically. When the plunger stop head 33 is away from the feed port 312, the paint flows into the plunger stop valve 31 through the feed port 312, and is then output to the pump seat through the discharge port 311. Finally, the paint in the paint tank is output through the pump seat and the spraying work is completed. The present invention has a long service life and a good spraying effect. The plunger stop valve 31 is not easily damaged during use, and the service life of the first sealing ring 313 on the plunger stop valve 31 is increased. There is less aerosol paint during spraying, energy is saved, environmental pollution is small, and it is easy to move, which saves effort and time, and greatly improves the quality of spraying.

[0033] In this embodiment, the plunger stop valve 31 is outer-connected with a first sealing ring 313 , and the outer wall of the plunger stop valve 31 is threadedly connected with a fixing ring 314 for fixing the first sealing ring 313 , and the plunger stop valve 31 is slidably matched with the paint cylinder 2 .

[0034] With the above structure, the first sealing ring 313 is used to strengthen the connection strength between the plunger stop valve 31 and the inner wall of the paint cylinder 2, enhance the air tightness, and prevent air leakage. The first sealing ring 313 is made of high-strength wear-resistant material to increase the service life during sliding.

[0035] In this embodiment, a screw hole 41 is formed on the outer wall of the suction cylinder 4 , and a positioning screw 42 for limiting the moving range of the suction stop valve 52 is threadedly connected to the inner thread of the screw hole 41 .

[0036] With the above structure, a sealing ring is provided between the positioning screw 42 and the screw hole 41 to ensure the air tightness inside the suction cylinder 4. The positioning screw 42 is used to limit the moving range of the suction stop valve 52 in the suction cylinder 4 to prevent the suction stop valve 52 from moving excessively, thereby greatly improving the stability of the device. The lower end of the positioning screw 42 is clamped on the convex ring 524 at the extreme position.

[0037] In this embodiment, the plunger stopper 33 is conical, and a first key groove 331 is formed on an outer wall of the plunger stopper 33 .

[0038] By adopting the above structure, the plunger stop head 33 is tapered, which can better fit with the plunger stop valve 31, improve the fit, ensure that there will be no accidents during the use of the device, and greatly improve the stability of the device. The key groove provided on the plunger stop head 33 is convenient for assembly and installation. The above setting does not limit the plunger stop head to other shapes such as cylindrical.

[0039] In this embodiment, the auxiliary suction cup 53 is fixed to the lower end of the auxiliary suction rod 51 by a nut 534. The auxiliary suction cup 53 includes a first iron sheet 531, a spacer sleeve 532 and a second iron sheet 533. The first iron sheet 531, the spacer sleeve 532 and the second iron sheet 533 are sequentially sleeved on the auxiliary suction rod 51 and fixed to the lower end of the auxiliary suction rod 51 by a nut 534.

[0040] By adopting the above structure, the split setting can better adapt to different usage environments. Iron sheets of different diameters can be replaced according to needs, or a suitable iron sheet can be selected according to the inner diameter of the paint bucket, which greatly improves the effect of auxiliary feeding. After the spraying operation is completed, it is convenient to clean the auxiliary suction cup 53 to increase the service life of the auxiliary suction cup 53. The auxiliary suction cup 53 can also adopt an integrated structure according to actual conditions, specifically the first iron sheet 531, the spacer sleeve 532 and the second iron sheet 533 are integrated and are not limited to a split structure.

[0041] In this embodiment, the suction stop valve 52 includes a suction stop valve shell 521 and a clamping cap 522. The suction stop valve shell 521 is threadedly connected to the clamping cap 522. A second sealing ring 523 is provided between the suction stop valve shell 521 and the clamping cap 522. A convex ring 524 is opened on the suction stop valve shell 521.

[0042] With the above structure, the second sealing ring 523 between the suction stop valve housing 521 and the clamping cap 522 is used to improve the connection strength between the suction stop valve 52 and the suction-assisting rod 51 to ensure that the paint will not flow through the gap between the suction stop valve 52 and the suction-assisting rod 51. The clamping cap 522 is used to fix the second sealing ring 523 to prevent the second sealing ring 523 from moving during use, thereby greatly improving the stability of the device. The suction stop valve 52 structure can also be formed in an integrated manner, specifically, the suction stop valve housing 521 and the clamping cap 522 are designed as an integrated whole.

[0043] In this embodiment, the suction cylinder 4 is connected to the paint cylinder 2 via threads.

[0044] The above structure is adopted to facilitate the assembly and use of the device, plays a role in positioning and installation, and facilitates the disassembly of the device after use.

[0045] In this embodiment, four discharge ports 311 are provided.

[0046] The above structure plays a role of diversion. The paint is thick and has poor fluidity. Setting four discharge ports 311 can greatly improve the discharge situation of the device. At the same time, the rising structure can be designed as multiple discharge ports 311 according to actual conditions, and is not limited to four.

[0047] In this embodiment, the plunger stopper 33 is provided with a conical surface 332 and a flat surface 333 , and the conical surface 332 is in contact and sealed with the plunger stop valve 31 .

[0048] By adopting the above connection mode, the conical surface 332 of the plunger stop head 33 is engaged with the plunger stop valve 31 , which can ensure the fitting strength between the outer wall of the plunger stop head 33 and the plunger stop valve 31 .

[0049] Example 2

[0050] Based on Example 1, Fig.13 As shown, the plunger stop head 33 is provided with a conical surface 332 and a plane 333, and the plane 333 is in contact and sealed with the plunger stop valve 31. The contact of the plane 333 can also achieve a sealing effect.

[0051] Example 3

[0052] Based on Example 1, Fig.14 As shown, the suction cylinder 4 is connected to the paint cylinder 2 via a clamp 6. Specifically, the suction cylinder 4 and the paint cylinder 2 are of plug-in design and fixed with a clamp. This structure facilitates the disassembly and assembly of the suction cylinder 4 and the paint cylinder 2, and can be disassembled even if they are rusted.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plunger pump for a pneumatic sprayer, characterized in that: The invention comprises a paint cylinder (2), a plunger stop valve mechanism (3) located in the paint cylinder (2), a suction cylinder (4), and a suction stop valve mechanism (5) located in the suction cylinder (4); the paint cylinder (2) is provided with an insertion port (21); the plunger stop valve mechanism (3) comprises a plunger stop valve (31), a plunger valve rod (32), and a plunger stop head (33) connected to the lower end of the plunger valve rod (32); the plunger stop valve (31) is sleeved on the plunger valve rod (32); the upper end of the suction cylinder (4) is connected to the lower end of the paint cylinder (2); The plunger stop valve (31) is provided with a discharge port (311) and a feed port (312) for discharging paint. The plunger stop valve (31) and the plunger stop head (33) are in contact and sealed with each other. The suction stop valve mechanism (5) comprises a suction-assisting rod (51), a suction stop valve (52) and a suction-assisting disc (53). The suction stop valve (52) is sleeved on the outer wall of the suction-assisting rod (51). The suction-assisting disc (53) is fixed to the lower end of the suction-assisting rod (51). The upper end of the suction-assisting rod (51) is threadedly connected to the plunger stop head (33). The plunger stop valve (31) is outer-connected with a first sealing ring (313); the outer wall of the plunger stop valve (31) is threadedly connected with a fixing ring (314) for fixing the first sealing ring (313); the plunger stop valve (31) is slidably matched with the paint cylinder (2); The suction stop valve (52) comprises a suction stop valve housing (521) and a clamping cap (522); the suction stop valve housing (521) and the clamping cap (522) are threadedly connected; a second sealing ring (523) is provided between the suction stop valve housing (521) and the clamping cap (522); and a convex ring (524) is provided on the suction stop valve housing (521).

2. A plunger pump for a pneumatic sprayer according to claim 1, characterized in that: The outer wall of the suction cylinder (4) is provided with a screw hole (41), and a positioning screw (42) for limiting the movement range of the suction stop valve (52) is connected to the inner thread of the screw hole (41).

3. A plunger pump for a pneumatic sprayer according to claim 1, characterized in that: The plunger stopper (33) is conical, and a first keyway (331) is provided on an outer wall of the plunger stopper (33).

4. A plunger pump for a pneumatic sprayer according to claim 1, characterized in that: The suction-assisting cup (53) is fixed to the lower end of the suction-assisting rod (51) by means of a nut (534); the suction-assisting cup (53) comprises a first iron sheet (531), a spacer sleeve (532) and a second iron sheet (533); the first iron sheet (531), the spacer sleeve (532) and the second iron sheet (533) are sequentially sleeved on the suction-assisting rod (51) and fixed to the lower end of the suction-assisting rod (51) by means of a nut (534).

5. A plunger pump for a pneumatic sprayer according to claim 1, characterized in that: The suction cylinder (4) is connected to the paint cylinder (2) via a clamp (6) or a thread.

6. A plunger pump for a pneumatic sprayer according to claim 1, characterized in that: The number of the discharge ports is 4.

7. A plunger pump for a pneumatic sprayer according to claim 1, characterized in that: The plunger stopper (33) is provided with a conical surface (332) and a flat surface (333), and the conical surface (332) or the flat surface (333) are respectively in contact with the plunger stop valve (31) for sealing.

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