Plunger pump for spraying thick fireproof coating

Abstract

The utility model discloses a thick fire retardant coating spraying plunger pump which comprises a plunger driving structure, a feeding valve structure is arranged below the plunger driving structure, one side of the bottom of the feeding valve structure is connected with a first discharging valve structure, and a second discharging valve structure is arranged above the first discharging valve structure. The second discharge valve structure is directly connected with an air exhaust valve through a discharge pipeline; compared with the original state, the part U-shaped fork is additionally arranged on the plunger rod, when the plunger moves downwards, the input power is not changed, the interface area is reduced, the pressure in the working cavity is increased, when the plunger rod moves downwards, the part U-shaped fork has the force for moving downwards, accumulated paint on the inner wall of the working cavity can be cleaned, the paint can be extruded out more sufficiently, and the working efficiency is improved. The pressure grading cavity is adopted, and the two outlet valve structures are arranged, so that the pressure loss in the working process can be reduced, the pressure loss at a pipeline opening is reduced, the application scene range is greatly enlarged, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of spraying equipment, and in particular relates to a plunger pump for spraying thick fireproof coatings. Background Technology

[0002] Fire-retardant coating spraying machines are specialized coating equipment used in fire-resistant construction. Their principle involves a power source that drives a plunger pump to reciprocate at different frequencies, resulting in a stable and continuous operation that pressurizes the drawn-in coating. The coating is then delivered through a high-pressure hose to the spray gun, where it is atomized and released onto the surface of the object being coated. The plunger pump is the core drive structure, its main function being to draw coating from the bottom of the pump into the pump chamber during reciprocating motion. The plunger then pushes the coating downwards, forcing it out through a side opening at the bottom of the chamber. Finally, the coating is pushed through a discharge ball valve to the spray gun, thus achieving high-pressure spraying.

[0003] However, during long-term practical use, the following defects of the traditional plunger pump structure were found to exist during operation:

[0004] Firstly, the medium of coatings has the characteristic of accumulating and solidifying, which often results in the accumulation of clumps at the feed ball valve of the plunger pump, causing the feed ball valve to fail to seal and malfunction. Secondly, due to the varying elevations of the work sites for coating application, the higher construction head required for high-altitude operations leads to a greater demand for the plunger pump's delivery pressure. The coating delivery pressure designed for traditional plunger pumps cannot meet this demand, resulting in poor spraying effects. Therefore, a plunger pump for thick-film fireproof coating spraying is designed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a thick-film fireproof paint spraying plunger pump to solve the problems of easy accumulation of lumps at the feed ball valve of the plunger pump of the traditional paint spraying machine and insufficient paint delivery pressure.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: it includes a plunger drive structure, a feed valve structure is provided below the plunger drive structure, a first discharge valve structure is connected to one side of the bottom of the feed valve structure, a second discharge valve structure is provided above the first discharge valve structure, and an air vent valve is directly connected to the second discharge valve structure through a discharge pipe.

[0007] The plunger drive structure includes a plunger pump body, a plunger rod inside the plunger pump body, a connecting seat above the plunger pump body, an upper connecting ring fixedly provided on the outer diameter surface of the connection between the plunger pump body and the connecting seat, the plunger rod passing through the connecting seat, a plunger sealing ring provided on the outer diameter surface of the bottom of the plunger rod, a lower connecting ring fixedly provided on the outer diameter surface of the connection between the bottom of the plunger pump body and the feed valve structure, and a U-shaped fork fixedly connected to the bottom end of the plunger rod, the U-shaped fork moving up and down as the plunger rod moves;

[0008] The U-shaped fork increases the lateral force on the bottom of the feed valve structure, generates a directional force for paint extrusion, avoids paint accumulation in dead corners and causes caking, and the second discharge valve structure and the first discharge valve structure are designed by pressure grading to improve the spraying pressure when working at high lift.

[0009] Further, the feed valve structure comprises a feed valve body, a pump body working cavity is formed in the feed valve body, a first limiting pin is arranged through the inner wall of the pump body working cavity, a feed valve ball is arranged below the first limiting pin, and a feed valve seat is arranged below the feed valve ball.

[0010] Further, the first discharge valve structure comprises a first discharge valve body, a discharge valve assembly connecting nut is arranged on the outer diameter surface of the connection part of the first discharge valve body and the feed valve body, a first discharge cavity is formed in the first discharge valve body, the first discharge cavity is communicated with the pump body working cavity, a first discharge valve ball is arranged in the first discharge cavity, a first discharge valve seat is arranged below the first discharge valve ball, and a second limiting pin is arranged above the first discharge valve ball.

[0011] Further, the second discharge valve structure comprises a second discharge valve body, a second discharge cavity is formed in the second discharge valve body, one end of the second discharge cavity is communicated with the first discharge cavity, the other end of the second discharge cavity is directly communicated with a discharge pipeline, a second discharge valve ball is arranged in the second discharge cavity, a second discharge valve seat is arranged below the second discharge valve ball, and a third limiting pin is arranged above the second discharge valve ball.

[0012] Beneficial effects: 1. Compared with the original state, the plunger rod is increased by the part U-shaped fork. When the plunger moves downward, the input power remains unchanged, the area decreases, and the pressure in the working cavity increases. When the plunger rod moves downward, the part U-shaped fork has a downward force, which can clean the accumulated paint on the inner wall of the bottom of the working cavity, and the paint is extruded more fully. Meanwhile, the structure shape can change the distribution state of the downward force, increase the lateral force of the outlet on the side of the plunger pump bottom, and generate a directional force for extruding the paint.

[0013] 2. The utility model adopts a hierarchical cavity pressure storage design, has two discharge valve structures, can reduce pressure loss in the working process, reduces the pressure loss at the pipeline opening, greatly increases the applicable scene range, improves the working efficiency, the intermediate transition cavity behind the outlet valve can also increase the pressure at the pipeline opening, so that the response speed of the outlet valve is faster, the applicable spraying height of the plunger pump equipment is improved, and the spraying height can be increased by several times. It is also completely applicable to high-altitude work occasions. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model

[0015] Figure 2 It is a sectional view of the utility model

[0016] Figure 3 It is the feeding valve structure schematic view of the utility model;

[0017] Figure 4 It is the second discharge valve structure schematic view of the utility model.

[0018] In the drawing: 1-plunger drive structure, 2-feeding valve structure, 3-first discharge valve structure, 4-second discharge valve structure, 5-discharge pipeline, 6-bleed air valve;

[0019] 11-plunger pump body, 12-plunger rod, 13-connection seat, 14-upper connection ring, 15-plunger sealing ring, 16-lower connection ring, 17-U-shaped fork;

[0020] 21-feeding valve body, 22-pump body working cavity, 23-first limit pin, 24-feeding valve ball, 25-feeding valve seat;

[0021] 31-first discharge valve body, 32-discharge valve assembly connecting nut, 33-first discharge cavity, 34-first discharge valve ball, 35-first discharge valve seat, 36-second limit pin;

[0022] 41-second discharge valve body, 42-second discharge cavity, 43-second discharge valve ball, 44-second discharge valve seat, 45-third limit pin. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] Combined Figures 1-4 As shown in the thick fire retardant coating spraying plunger pump, including plunger drive structure 1, it is through reciprocating motion and carries out pressurized delivery, plunger drive structure 1 below is equipped with feeding valve structure 2, coating is passed through feeding valve structure 2 and enters the cavity inside, feeding valve structure 2 bottom side is connected with first discharge valve structure 3, first discharge valve structure 3 top is equipped with second discharge valve structure 4, second discharge valve structure 4 and first discharge valve structure 3 mutually cooperate and promote the spraying pressure when high lift operation, both are directly connected, through the way of the design of the pressure storage of hierarchical cavity, can reduce the pressure loss in the working process, reduce the pressure loss at the pipe mouth, greatly increase the range of application scene, improve work efficiency, second discharge valve structure 4 is directly connected with bleed air valve 6 through discharge pipeline 5, carries out gas discharge;

[0025] The plunger driving structure 1 comprises a plunger pump body 11, a plunger rod 12 is arranged inside the plunger pump body 11, the plunger rod 12 reciprocates up and down in the plunger pump body 11, a connecting seat 13 is arranged above the plunger pump body 11, which serves to connect the power conversion device and fix the plunger pump body 11, an upper connecting ring 14 is fixedly arranged on the outer diameter surface of the connecting position of the plunger pump body 11 and the connecting seat 13, and the upper connecting ring 14 is rotationally and fixedly connected through thread cooperation, the plunger rod 12 penetrates through the connecting seat 13, a plunger sealing ring 15 is arranged on the outer diameter surface of the bottom of the plunger rod 12, a lower connecting ring 16 is fixedly arranged on the outer diameter surface of the connecting position of the bottom of the plunger pump body 11 and the feed valve structure 2, and the lower connecting ring 16 is connected through thread sealing, the bottom of the plunger rod 12 is fixedly connected with a U-shaped fork 17, the U-shaped fork 17 is arranged on the plunger rod 12, which can increase the pressure in the plunger pump body 11 without changing the working cavity volume, and improve the performance, the U-shaped fork 17 moves up and down with the movement of the plunger rod 12 during work, which increases the lateral force on the bottom of the feed valve structure 2, generates directional force for paint extrusion, avoids paint accumulation in the dead angle at the bottom to cause caking, and avoids the problem of affecting the sealing of the ball valve.

[0026] The feed valve structure 2 comprises a feed valve body 21, a pump body working cavity 22 is arranged inside the feed valve body 21, a first limiting pin 23 is arranged through the inner wall of the pump body working cavity 22, the first limiting pin 23 is limited, a feed valve ball 24 is arranged below the first limiting pin 23, a feed valve seat 25 is arranged below the feed valve ball 24, and paint enters and flows out of the feed valve body 21 through the opening and closing of the feed valve ball 24.

[0027] The first discharge valve structure 3 comprises a first discharge valve body 31, an out valve assembly connecting nut 32 is arranged on the outer diameter surface of the connecting position of the first discharge valve body 31 and the feed valve body 21, and the two are directly connected through a discharge cavity, a first discharge cavity 33 is arranged inside the first discharge valve body 31, the first discharge cavity 33 is communicated with the pump body working cavity 22, a first discharge valve ball 34 is arranged in the first discharge cavity 33, a first discharge valve seat 35 is arranged below the first discharge valve ball 34, and a second limiting pin 36 is arranged above the first discharge valve ball 34, the second discharge valve structure 4 comprises a second discharge valve body 41, a second discharge cavity 42 is arranged inside the second discharge valve body 41, one end of the second discharge cavity 42 is communicated with the first discharge cavity 33, the other end of the second discharge cavity 42 is directly communicated with the discharge pipeline 5, a second discharge valve ball 43 is arranged in the second discharge cavity 42, a second discharge valve seat 44 is arranged below the second discharge valve ball 43, and a third limiting pin 45 is arranged above the second discharge valve ball 43, the first discharge valve structure 3 and the second discharge valve structure 4 have the same structure, and the cavities of the two are communicated, the pressure storage mode is arranged at different positions through grading, and the main purpose is to improve the spraying pressure during high-lift operation.

[0028] Working principle: when working, the plunger rod 12 is driven to do work under the reciprocating motion of the external motor conversion power, and moves up and down in the plunger pump body 11. When the plunger rod 11 moves upward, the pressure in the working cavity of the plunger pump body 11 decreases, the feed valve ball 24 is sucked upward, and the first discharge valve ball 34 is in the closed state. At this time, the paint is sucked into the pump body working cavity 22; when the plunger rod 12 moves downward, the pressure in the working cavity of the plunger pump body 11 will rise, and the movement state of each component is opposite. The first discharge cavity 33 is opened, the feed valve body 21 is closed, the paint is discharged from the pump body working cavity 22, and is extruded into the second discharge cavity 42 through the bottom side of the first discharge cavity 33. The second discharge valve ball 43 is pushed away, the paint enters the discharge pipeline 5, and the reciprocating cycle is carried out for high-pressure output spraying.

[0029] When the machine stops, the plunger rod 11 is stationary, and at this time the first discharge valve ball 34 and the second discharge valve ball 43 are both down sealed, and the paint is stationary and does not backflow.

[0030] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0031] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A thick fireproof coating spraying plunger pump characterized by: Including plunger drive structure (1), the plunger drive structure (1) below is equipped with feed valve structure (2), one side of the bottom of feed valve structure (2) is connected with first discharge valve structure (3), the second discharge valve structure (4) is equipped with exhaust valve (6) directly through discharge pipeline (5) on the top of first discharge valve structure (3); The plunger drive structure (1) includes a plunger pump body (11), a plunger rod (12) is arranged inside the plunger pump body (11), a connecting seat (13) is arranged above the plunger pump body (11), an upper connecting ring (14) is fixedly arranged on the outer diameter surface of the connecting portion of the plunger pump body (11) and the connecting seat (13), the plunger rod (12) penetrates through the connecting seat (13), a plunger sealing ring (15) is arranged on the outer diameter surface of the bottom of the plunger rod (12), a lower connecting ring (16) is fixedly arranged on the outer diameter surface of the connecting portion of the plunger pump body (11) and the feed valve structure (2), a U-shaped fork (17) is fixedly connected to the bottom end of the plunger rod (12), the U-shaped fork (17) moves up and down along with the movement of the plunger rod (12). The U-shaped fork (17) increases the lateral force borne by the bottom of the feed valve structure (2), generates directional force for paint extrusion, avoids paint accumulation in the bottom dead angle and caking, and the second discharge valve structure (4) and the first discharge valve structure (3) are designed by pressure grading to improve the spraying pressure when working at high lift.

2. A thick fireproof coating spraying plunger pump according to claim 1, characterized in that: The feed valve structure (2) includes a feed valve body (21), a pump body working cavity (22) is formed in the feed valve body (21), a first limiting pin (23) is arranged on the inner wall of the pump body working cavity (22), a feed valve ball (24) is arranged below the first limiting pin (23), and a feed valve seat (25) is arranged below the feed valve ball (24).

3. A thick fireproof coating spraying plunger pump according to claim 2, characterized in that: The first discharge valve structure (3) includes a first discharge valve body (31), an out valve assembly connecting nut (32) is arranged on the outer diameter surface of the connecting portion of the first discharge valve body (31) and the feed valve body (21), a first discharge cavity (33) is formed in the first discharge valve body (31), the first discharge cavity (33) is communicated with the pump body working cavity (22), a first discharge valve ball (34) is arranged in the first discharge cavity (33), a first discharge valve seat (35) is arranged below the first discharge valve ball (34), and a second limiting pin (36) is arranged above the first discharge valve ball (34).

4. A thick fireproof coating spraying plunger pump according to claim 3, characterized in that: The second discharge valve structure (4) includes a second discharge valve body (41), a second discharge cavity (42) is formed in the second discharge valve body (41), one end of the second discharge cavity (42) is communicated with the first discharge cavity (33), the other end of the second discharge cavity (42) is directly communicated with the discharge pipeline (5), a second discharge valve ball (43) is arranged in the second discharge cavity (42), a second discharge valve seat (44) is arranged below the second discharge valve ball (43), and a third limiting pin (45) is arranged above the second discharge valve ball (43).

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