High-pressure airless spray gun

Abstract

The utility model discloses a high pressure airless spray gun which comprises a gun body and a plunger pump, the plunger pump comprises a pump body, the pump body is provided with two liquid inlet cavities arranged in a bilateral symmetry mode and two liquid outlet cavities arranged in a bilateral symmetry mode, liquid inlet one-way valve assemblies are arranged in the liquid inlet cavities, and liquid outlet one-way valve assemblies are arranged in the liquid outlet cavities. The liquid injection pump is characterized in that the left end and the right end of the pump body penetrate out of the gun body, the outer ends of the liquid inlet cavity and the liquid outlet cavity are open ends, the open end of the liquid inlet cavity is provided with a detachable first disassembly and assembly seat, the first disassembly and assembly seat is correspondingly connected with the outer end of a first valve body in the liquid inlet one-way valve assembly, and the open end of the liquid outlet cavity is provided with a detachable second disassembly and assembly seat. The second dismounting seat is correspondingly connected with the outer end of a second valve body in the liquid outlet one-way valve assembly; the plunger pump has the advantages that the one-way valve assembly in the pump body can be directly pulled out by dismounting the dismounting seat without opening the gun body, and the one-way valve assembly can be directly mounted on the pump body after being cleaned and replaced, so that the plunger pump is convenient and rapid to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of electric spray guns, in particular to a high-pressure airless spray gun. Background Art

[0002] High-pressure airless spraying refers to a spraying method that uses a high-pressure plunger pump to directly pressurize the paint and spray it out of the gun nozzle to form an atomized airflow that acts on the surface of the object. The plunger pump in existing high-pressure airless spray guns is basically hidden in the gun body, and the one-way valve and piston sleeve in the plunger pump need to be sealed by screwing or fixedly connected through a sealing cover. When the spray gun is used for a long time, impurities in the paint are easily accumulated in the plunger pump, causing the spring, sealing ring, etc. in the plunger pump to fail. When the plunger pump needs to be cleaned or repaired, it is necessary to first open the gun body of the spray gun and then open the sealing cover on the plunger pump. This brings operational inconvenience to the maintenance and cleaning of the plunger pump in the spray gun, and also causes economic losses due to the inability to disassemble or destructive disassembly of the plunger pump. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a high-pressure airless spray gun, which can directly disassemble and assemble the plunger pump, clean it, and replace parts without opening the gun body.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a high-pressure airless spray gun, including a gun body and a plunger pump, the plunger pump including a pump body, the pump body is provided with a liquid inlet, a liquid outlet channel, two liquid inlet chambers and two liquid outlet chambers symmetrically arranged on the left and right, the two liquid inlet chambers are connected through a first channel, the liquid inlet is connected to the first channel, the two liquid outlet chambers are connected through a second channel, the liquid outlet channel is connected to the second channel, the liquid inlet is connected to the material pipe in the spray gun material pot, the liquid outlet channel is connected to The liquid outlet components in the spray gun are connected, a liquid inlet one-way valve component is provided in the liquid inlet chamber, a liquid outlet one-way valve component is provided in the liquid outlet chamber, the left and right ends of the pump body pass through the gun body, the outer ends of the liquid inlet chamber and the liquid outlet chamber are both open ends, the open end of the liquid inlet chamber is provided with a detachable first disassembly seat, the first disassembly seat is correspondingly connected to the outer end of the first valve body in the liquid inlet one-way valve component, the open end of the liquid outlet chamber is provided with a detachable second disassembly seat, the second disassembly seat is correspondingly connected to the outer end of the second valve body in the liquid outlet one-way valve component.

[0005] Furthermore, the plunger pump also includes a piston rod assembly and a piston rod reciprocating drive mechanism, the piston rod assembly includes a piston rod and piston sleeves located at both ends of the piston rod, an inner cavity is provided in the piston sleeve, the end of the piston rod extends into the inner cavity of the piston sleeve at its corresponding end, and the piston rod is sealed and matched with the piston sleeve, two left-right symmetrical piston chambers are provided in the pump body, the piston sleeves are arranged in the piston chambers one-to-one and sealed with the piston chambers, a channel connecting the liquid inlet chamber, the liquid outlet chamber and the piston chamber located at the same end is provided in the pump body, a liquid suction port connecting the channel and the inner cavity is provided on the side wall of the piston sleeve, the outer end of the piston chamber is an open end, and a detachable third disassembly seat is provided at the outer end of the piston chamber, and the third disassembly seat is connected to the outer end of the piston sleeve.

[0006] Furthermore, the first disassembly seat is fixedly connected or rotatably connected to the outer end of the first valve body, the second disassembly seat is fixedly connected or rotatably connected to the outer end of the second valve body, and the third disassembly seat is fixedly connected or rotatably connected to the outer end of the piston sleeve.

[0007] Furthermore, the first disassembly and assembly seat, the second disassembly and assembly seat and the third disassembly and assembly seat are rotatably connected to the outer ends of the first valve body, the second valve body and the piston sleeve respectively through bearings.

[0008] Furthermore, the outer ends of the first valve body, the second valve body and the piston sleeve are respectively fixed with T-shaped connecting shafts, and the inner ends of the first disassembly seat, the second disassembly seat and the third disassembly seat are correspondingly sleeved on the outer ends of the first valve body, the second valve body and the piston sleeve, and the inner ends of the first disassembly seat, the second disassembly seat and the third disassembly seat are abutted against the large ends of the corresponding connecting shafts to prevent the inner ends of the first disassembly seat, the second disassembly seat and the third disassembly seat from being separated from the outer ends of the corresponding first valve body, the second valve body and the piston sleeve and being able to rotate relative to each other.

[0009] Furthermore, the first disassembly and assembly seat, the second disassembly and assembly seat and the third disassembly and assembly seat are respectively threadedly connected to the pump body.

[0010] Furthermore, the piston rod reciprocating drive mechanism includes an eccentric shaft and a drive block. The eccentric shaft is driven to rotate by a motor. The drive block is rotatably connected to the eccentric section of the eccentric shaft. A connecting groove running through the middle of the piston rod is provided. The drive block is embedded in the connecting groove and can slide relatively up and down.

[0011] Furthermore, the liquid inlet one-way valve assembly includes a first valve body, a first sealing ball and a first spring. The first valve body is sealed and matched with the liquid inlet chamber. The inner end of the first valve body is provided with a first liquid inlet connected to the first channel. The first sealing ball is provided in the first valve body and matched with the first liquid inlet. The first spring is resting between the first sealing ball and the first valve body. The side of the first valve body is provided with a first liquid outlet, and the first liquid outlet is connected to the channel.

[0012] Furthermore, the liquid outlet one-way valve assembly includes a second valve body, a second sealing ball and a second spring. The second valve body is sealed and matched with the liquid outlet cavity. The second valve body is provided with a second liquid inlet connected to the channel. The second sealing ball is arranged in the second valve body and matched with the second liquid inlet. The second spring is pressed between the second sealing ball and the second valve body. The inner end of the second valve body is provided with a second liquid outlet connected to the second channel.

[0013] Furthermore, a pressure sensor is provided in the liquid outlet channel, and a signal switch is connected to the pressure sensor.

[0014] Furthermore, decorative covers are provided on the left and right sides of the gun body, and the decorative covers cover the pump body on the corresponding sides.

[0015] Compared with the prior art, the advantage of the present invention is that since the left and right ends of the pump body of the plunger pump pass through the gun body, and the valve bodies of the one-way valve assembly in the pump body are connected to the disassembly seat, the one-way valve assembly in the pump body can be directly pulled out by disassembling the disassembly seat without opening the gun body, and the parts in the one-way valve assembly can be directly installed on the pump body after cleaning and replacement, making the maintenance of the plunger pump convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model after removing the gun body;

[0018] Figure 3 It is a front view of the plunger pump of the present utility model;

[0019] Figure 4 for Figure 3 AA section view in;

[0020] Figure 5 for Figure 3 BB cross-sectional view in;

[0021] Figure 6 for Figure 5 CC section view in. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0023] As shown in the figure, a high-pressure airless spray gun includes a gun body 1 and a plunger pump. The plunger pump includes a pump body 2, a piston rod assembly and a piston rod reciprocating drive mechanism. The pump body 2 is provided with a liquid inlet 21, a liquid outlet channel 22, two liquid inlet chambers arranged symmetrically on the left and right, and two liquid outlet chambers arranged symmetrically on the left and right. The two liquid inlet chambers are connected through a first channel 23, the liquid inlet 21 is connected to the first channel 23, the two liquid outlet chambers are connected through a second channel 24, the liquid outlet channel 22 is connected to the second channel 24, and the liquid inlet 21 is connected to the spray gun material pot. The material pipe 3 is connected, the liquid outlet channel 22 is connected to the liquid outlet component 4 in the spray gun, the liquid inlet chamber is provided with a liquid inlet one-way valve component 5, the liquid outlet chamber is provided with a liquid outlet one-way valve component 6, the left and right ends of the pump body 2 pass through the gun body 1, the outer ends of the liquid inlet chamber and the liquid outlet chamber are both open ends, the open end of the liquid inlet chamber is threadedly connected to a first disassembly seat 7, the first disassembly seat 7 is correspondingly connected to the outer end of the first valve body 51 in the liquid inlet one-way valve component 5, the open end of the liquid outlet chamber is threadedly connected to a second disassembly seat 8, the second disassembly seat 8 is correspondingly connected to the liquid outlet one-way valve component 6 The outer end of the second valve body 61 in the pump body is connected; the piston rod assembly includes a piston rod 9 and a piston sleeve 91 located at both ends of the piston rod 9. An inner cavity is provided in the piston sleeve 91. The end of the piston rod 9 extends into the inner cavity of the piston sleeve 91 at its corresponding end, and the piston rod 9 and the piston sleeve 91 are sealed with a sealing ring. Two left-right symmetrical piston cavities are provided in the pump body 2. The piston sleeves 91 are arranged in the piston cavity in a one-to-one correspondence and are sealed with the piston cavity through a sealing ring. The pump body 2 is provided with a channel connecting the liquid inlet cavity, the liquid outlet cavity and the piston cavity at the same end. 25. The side wall of the piston sleeve 91 is provided with a communication channel 25 and a liquid suction port 92 of the inner cavity. The outer end of the piston cavity is an open end. The outer end of the piston cavity is threadedly connected to a third disassembly seat 93, and the third disassembly seat 93 is connected to the outer end of the piston sleeve 91; the piston rod reciprocating drive mechanism includes an eccentric shaft 94 and a drive block 95. The eccentric shaft 94 is driven to rotate by a motor 96. The drive block 95 is rotatably connected to the eccentric section of the eccentric shaft 94. The middle part of the piston rod 9 is provided with a connecting groove running through the upper and lower parts. The drive block 95 is embedded in the connecting groove and can slide relatively up and down.

[0024] The liquid inlet one-way valve assembly 5 includes a first valve body 51, a first sealing ball 52 and a first spring 53. The first valve body 51 is sealed with the liquid inlet cavity through a sealing ring. The inner end of the first valve body 51 is provided with a first liquid inlet 54 connected to the first channel 23. The first sealing ball 52 is arranged in the first valve body 51 and cooperates with the first liquid inlet 54. The first spring 53 is pressed between the first sealing ball 52 and the first valve body 51. A first liquid outlet 55 is provided on the side of the first valve body 51. The first liquid outlet 55 is connected to the channel 23. 5 is connected; the liquid outlet one-way valve assembly 6 includes a second valve body 61, a second sealing ball 62 and a second spring 63. The second valve body 61 is sealed with the liquid outlet cavity through a sealing ring. The second valve body 61 is provided with a second liquid inlet 64 connected with the channel 25. The second sealing ball 62 is arranged in the second valve body 61 and cooperates with the second liquid inlet 64. The second spring 63 is abutted between the second sealing ball 62 and the second valve body 61. The inner end of the second valve body 61 is provided with a second liquid outlet 65 connected with the second channel 24.

[0025] In the above embodiment, the first disassembly seat 7, the second disassembly seat 8, and the third disassembly seat 93 can be fixedly connected or rotatably connected to the outer ends of the first valve body 51, the second valve body 61, and the piston sleeve 91, respectively. When the two are rotatably connected, when the first disassembly seat 7, the second disassembly seat 8, or the third disassembly seat 93 is rotated, the first valve body 51, the second valve body 61, or the piston sleeve 91 can be prevented from rotating therewith, thereby preventing the sealing ring from being damaged during the disassembly process. In addition, the first disassembly seat 7, the second disassembly seat 8, and the third disassembly seat 93 can be rotatably connected to the outer ends of the first valve body 51, the second valve body 61, and the piston sleeve 91, respectively, via bearings. A T-shaped connecting shaft 10 can also be fixed to the outer ends of the first valve body 51, the second valve body 61 and the piston sleeve 91 respectively, and the inner ends of the first disassembly seat 7, the second disassembly seat 8 and the third disassembly seat 93 are correspondingly sleeved on the outer ends of the first valve body 51, the second valve body 61 and the piston sleeve 91, and the inner ends of the first disassembly seat 7, the second disassembly seat 8 and the third disassembly seat 93 are abutted against the large ends of the corresponding connecting shaft 10 to prevent the inner ends of the first disassembly seat 7, the second disassembly seat 8 and the third disassembly seat 93 from being separated from the outer ends of the corresponding first valve body 51, the second valve body 61 and the piston sleeve 91 and from rotating relative to each other.

[0026] In addition, a pressure sensor 11 can be provided in the liquid outlet channel 22. A signal switch 12 is connected to the pressure sensor 11. The pressure sensor 11 can detect the liquid pressure in the liquid outlet channel 22 in real time. When the liquid pressure exceeds a set value, the signal switch 12 sends a signal to the control system in the high-pressure airless spray gun to control the motor 96 to stop working, thereby preventing the motor from burning out or causing damage to the plunger pump. When the liquid pressure in the liquid outlet channel 22 is less than the set value, the control system controls the motor 96 to resume working. In this patent, the liquid outlet assembly 4 and the control system are existing related components in the high-pressure airless spray gun. The specific control method for detecting the liquid pressure by the pressure sensor 11 and the control between the signal switch 12 and the control system adopts the existing technology in this field.

[0027] In the above embodiment, the process of the piston rod reciprocating drive mechanism driving the piston rod to perform reciprocating motion is as follows: the motor 96 drives the eccentric shaft 94 to rotate, the eccentric shaft 94 drives the drive block 95 to rotate eccentrically, and the drive block 95 slides up and down in the connecting groove of the piston rod 9 while driving the piston rod 9 to move back and forth left and right.

[0028] The process of the plunger pump pressurizing the liquid in the material pot is as follows: taking the movement process of the liquid inlet one-way valve assembly 5 and the liquid outlet one-way valve assembly 6 at the left end in the pump body 2 as an example, the piston rod reciprocating drive mechanism drives the piston rod 9 to move to the right end, and the inner cavity in the piston sleeve 91 at the left end forms a vacuum, and the first sealing ball 52 in the liquid inlet one-way valve assembly 5 and the second sealing ball 62 in the liquid outlet one-way valve assembly 6 are adsorbed through the liquid suction port 92 on the piston sleeve 91 and the channel 25 to move to the left. At this time, the first liquid inlet 54 in the liquid inlet one-way valve assembly 5 is in an open state, and the second liquid inlet 64 in the liquid outlet one-way valve assembly 6 is in a closed state. The liquid in the material pot is sucked into the first valve body 51 in the liquid inlet one-way valve assembly 5 through the material pipe 3, the liquid inlet 21, and the first channel 23, and then passes through the first liquid outlet 55 Entering the channel 25 and the inner cavity of the piston sleeve 91 at the left end, the piston rod reciprocating drive mechanism then drives the piston rod 9 to move to the left end, and the piston rod 9 pushes the liquid in the inner cavity of the piston sleeve 91 at the left end to flow out, so that the liquid pressure increases, and at the same time, the liquid pushes the first sealing ball 52 in the liquid inlet one-way valve assembly 5 and the second sealing ball 62 in the liquid outlet one-way valve assembly 6 to move to the right. At this time, the first liquid inlet 54 in the liquid inlet one-way valve assembly 5 is in a closed state, and the second liquid inlet 64 in the liquid outlet one-way valve assembly 6 is in an open state. The liquid in the channel 25 enters the second valve body 61 through the second liquid inlet 64 in the liquid outlet one-way valve assembly 6 and flows into the liquid outlet channel 22 through the second liquid outlet 65 and the second channel 24, and then flows into the liquid outlet assembly 4 of the spray gun from the liquid outlet channel 22 to realize liquid spraying.

[0029] Since the liquid inlet one-way valve assembly 5 and the liquid outlet one-way valve assembly 6 in the pump body 2 are symmetrically arranged on the left and right sides, the liquid inlet one-way valve assembly 5 and the liquid outlet one-way valve assembly 6 located at the left and right ends of the pump body 2 can discharge liquid alternately.

[0030] In addition, decorative covers (not shown) may be provided on the left and right sides of the gun body 1, covering the corresponding pump body 2. The decorative covers may be fixed to the gun body 1 with screws, snap-fitted, or hingedly connected to the gun body 1.

[0031] The protection scope of the present invention includes but is not limited to the above embodiments, and its protection scope is subject to the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field fall within the protection scope of the present invention.

Claims

1. A high-pressure airless spray gun, comprising a gun body and a plunger pump, the plunger pump comprising a pump body, the pump body being provided with a liquid inlet, a liquid outlet channel, two liquid inlet chambers symmetrically arranged on the left and right, and two liquid outlet chambers symmetrically arranged on the left and right, the two liquid inlet chambers being connected via a first channel, the liquid inlet being connected to the first channel, the two liquid outlet chambers being connected via a second channel, the liquid outlet channel being connected to the second channel, the liquid inlet being connected to a material pipe in a spray gun material pot, the liquid outlet channel being connected to a liquid outlet assembly in the spray gun, a liquid inlet one-way valve assembly being provided in the liquid inlet chamber, and a liquid outlet one-way valve assembly being provided in the liquid outlet chamber, characterized in that: The left and right ends of the pump body pass through the gun body, and the outer ends of the liquid inlet chamber and the liquid outlet chamber are both open ends. The open end of the liquid inlet chamber is provided with a detachable first disassembly seat, and the first disassembly seat is correspondingly connected to the outer end of the first valve body in the liquid inlet one-way valve assembly. The open end of the liquid outlet chamber is provided with a detachable second disassembly seat, and the second disassembly seat is correspondingly connected to the outer end of the second valve body in the liquid outlet one-way valve assembly.

2. A high-pressure airless spray gun according to claim 1, characterized in that: The plunger pump also includes a piston rod assembly and a piston rod reciprocating drive mechanism. The piston rod assembly includes a piston rod and piston sleeves located at both ends of the piston rod. An inner cavity is provided in the piston sleeve. The end of the piston rod extends into the inner cavity of the piston sleeve at its corresponding end, and the piston rod is sealed and matched with the piston sleeve. Two left-right symmetrical piston chambers are provided in the pump body. The piston sleeves are arranged in the piston chambers one-to-one and sealed with the piston chambers. A channel connecting the liquid inlet chamber, liquid outlet chamber and piston chamber located at the same end is provided in the pump body. A liquid suction port connecting the channel and the inner cavity is provided on the side wall of the piston sleeve. The outer end of the piston chamber is an open end. A detachable third disassembly seat is provided at the outer end of the piston chamber, and the third disassembly seat is connected to the outer end of the piston sleeve.

3. A high-pressure airless spray gun according to claim 2, characterized in that: The first disassembly seat is fixedly connected or rotatably connected to the outer end of the first valve body, the second disassembly seat is fixedly connected or rotatably connected to the outer end of the second valve body, and the third disassembly seat is fixedly connected or rotatably connected to the outer end of the piston sleeve.

4. A high-pressure airless spray gun according to claim 3, characterized in that: The first disassembly and assembly seat, the second disassembly and assembly seat and the third disassembly and assembly seat are rotatably connected to the first valve body, the second valve body and the outer end of the piston sleeve via bearings.

5. A high-pressure airless spray gun according to claim 3, characterized in that: The outer ends of the first valve body, the second valve body and the piston sleeve are respectively fixed with T-shaped connecting shafts, and the inner ends of the first disassembly seat, the second disassembly seat and the third disassembly seat are correspondingly sleeved on the outer ends of the first valve body, the second valve body and the piston sleeve, and the inner ends of the first disassembly seat, the second disassembly seat and the third disassembly seat are abutted against the large ends of the corresponding connecting shafts to prevent the inner ends of the first disassembly seat, the second disassembly seat and the third disassembly seat from being separated from the outer ends of the corresponding first valve body, the second valve body and the piston sleeve and being able to rotate relative to each other.

6. A high-pressure airless spray gun according to claim 2, characterized in that: The first disassembly and assembly seat, the second disassembly and assembly seat and the third disassembly and assembly seat are respectively screwed to the pump body.

7. A high-pressure airless spray gun according to claim 2, characterized in that: The piston rod reciprocating drive mechanism includes an eccentric shaft and a drive block. The eccentric shaft is driven to rotate by a motor. The drive block is rotatably connected to the eccentric section of the eccentric shaft. A connecting groove running through the middle of the piston rod is provided. The drive block is embedded in the connecting groove and can slide relatively up and down.

8. A high-pressure airless spray gun according to claim 2, characterized in that: The liquid inlet one-way valve assembly includes a first valve body, a first sealing ball and a first spring. The first valve body is sealed and matched with the liquid inlet chamber. The inner end of the first valve body is provided with a first liquid inlet connected to the first channel. The first sealing ball is provided in the first valve body and matched with the first liquid inlet. The first spring is pressed between the first sealing ball and the first valve body. The side of the first valve body is provided with a first liquid outlet, and the first liquid outlet is connected to the channel.

9. A high-pressure airless spray gun according to claim 2, characterized in that: The liquid outlet one-way valve assembly includes a second valve body, a second sealing ball and a second spring. The second valve body is sealed and matched with the liquid outlet cavity. The second valve body is provided with a second liquid inlet connected to the channel. The second sealing ball is arranged in the second valve body and matched with the second liquid inlet. The second spring is pressed between the second sealing ball and the second valve body. The inner end of the second valve body is provided with a second liquid outlet connected to the second channel.

10. The high-pressure airless spray gun according to claim 1, characterized in that: A pressure sensor is provided in the liquid outlet channel, and a signal switch is connected to the pressure sensor.

11. The high-pressure airless spray gun according to claim 1, characterized in that: The left and right sides of the gun body are provided with decorative covers, and the decorative covers cover the pump body on the corresponding side.

Images