KR20240043969A - Automatic safety valve for power sprayers - Google Patents

Abstract

The present invention relates to an automatic pressure control body having an inlet connected to a communication bolt connected to the outlet of a power sprayer, a discharge port, and an inlet passage, and an automatic pressure control spring case that is connected to the inlet passage and has an outlet port and is coupled to the automatic pressure control body. It consists of a pressure control handle provided on the connection body coupled to the automatic pressure control spring case, an open/close valve and an automatic control shaft inside the upper and automatic pressure control body, and a power sprayer equipped with a ceramic ball and spring, and a separate It facilitates the convenience of using the power sprayer by ensuring that the water return action due to the overpressure relief operation is carried out automatically and smoothly within the device itself without the need for an assistant. It also prevents overloading and prevents damage to the discharge port. At the same time, it prevents damage and improves the safety of various sealing parts, and by installing a pressure sensing closure inside the opening and closing valve installed around the inner circumference of the water inlet of the automatic pressure regulating body, it operates inside the opening and closing valve in case of high pressure water flowing into the water inlet. By closing the discharge hole of the opening/closing valve with the pressure sensing closing part, the high pressure water pressure flowing into the automatic pressure regulating body is primarily sensed and closed by the pressure sensing closing part, and the overflow caused by the high pressure water pressure is prevented from entering the inlet of the automatic regulating body. This relates to an automatic safety valve for a power sprayer that prevents.

Description

Automatic safety valve for power sprayers}

The present invention relates to an automatic safety valve for a power sprayer, and more specifically, to an automatic safety valve for a power sprayer that automatically performs a water return action according to the overpressure relief operation and also prevents overload. will be.

In general, a power sprayer operates by receiving power from a motor or engine. Such a power sprayer includes a pump that compresses a chemical liquid (liquid such as water or various pesticides), a cylinder block in which a plurality of pistons are installed to reciprocate, It consists of an inlet that is connected to the chemical tank and sucks in the chemical, an outlet that has a cock connected to the spray nozzle to discharge the chemical, and a safety valve that has a safety lever and is connected to the discharge port to control the pressure. .

In the power sprayer constructed as described above, when the maximum pressure due to the cessation of discharge of pumping pressure when spraying the chemical solution is stopped, the fluid is discharged to maintain the pressure below the set pressure, and the fluid is sprayed to prevent the occurrence of overpressure. A safety valve is being applied to promote the safety of the power sprayer by preventing destruction and damage to equipment, pipes, hoses, etc. by discharging it to the outside.

However, in the conventional safety valve for a power sprayer, because it was structured in such a way that still water was discharged through a pressure chamber without a separate outlet, there was a very dangerous problem in that the pressure was structurally uneven and overload occurred during spraying, causing damage to the outlet. , In particular, when restarting the spraying operation after stopping the spraying, there was a very dangerous problem in which overload automatically occurred because the initial instantaneous pressure was large when the cock of the spraying nozzle was opened.

In addition, in the past, the safety valve for the power sprayer was operated manually, so in order to operate the safety valve, an assistant other than the sprayer had to operate the safety lever at the location where the power sprayer was located, depending on the situation, which was a cumbersome and inconvenient problem. .

In addition, in reality, the distance between two people is long and the generation of noise caused by power is large, making it difficult to transmit a perfect signal. In most cases, the cock of the spray nozzle is locked while residual pressure exists, so the main component inside the power sprayer is There was a problem that shortened the lifespan of the device by affecting the sealing parts of each part, such as the packing.

In order to solve the above problems, the present invention includes an automatic pressure regulating body having an inlet connected to a communication bolt connected to the outlet of a power sprayer, a discharge port and an inlet passage, and an outlet connected to the inlet passage. It is equipped with an automatic pressure regulation spring case combined with the pressure regulation body, a pressure control knob provided on the connection body coupled with the automatic pressure regulation spring case, an open/close valve and an automatic adjustment shaft, and a ceramic ball and spring inside the upper and automatic pressure regulation body. A new power sprayer that is composed of one power sprayer, making it easier to use the power sprayer by ensuring that the water return action due to the overpressure relief operation is automatically and smoothly performed within the device itself without the need for a separate assistant. The purpose is to provide an automatic safety valve for use.

In addition, the purpose of the present invention is to provide a new automatic safety valve for a power sprayer that prevents overloading and prevents damage to the outlet and improves the safety of various sealing parts.

In order to achieve this object, the present invention is connected to the discharge port (c2) of the power sprayer 200 through a connector and communicates with each other, an inlet port 21, a discharge port 22 and an intake passage 23, and a valve. an automatic pressure regulating body (20) including a thread (24); The automatic pressure control body cover (10) is airtightly connected to the automatic pressure control body (20) and is assembled so that the chemical liquid entering the intake passage (23) passes through the inlet hole (11), the outlet (12), and is discharged into the valve chamber (24). )and; An automatic pressure regulation spring case (30) connected to the upper part of the automatic pressure regulation body (20) and having an overflow port (31) communicating with the overflow hole (51) and a valve chamber (32); An opening/closing valve (40) mounted between the water inlet (21) and the valve chamber (24) of the automatic pressure regulating body (20); A piston guide (50) installed in the valve chamber (24) of the automatic pressure regulating body (20), having a discharge hole (51) communicating with the water intake space (29), and having an installation hole (a) therein; A ceramic sheet 60, a ceramic ball 70, and a spool 80 sequentially built into the valve chamber 32 of the automatic pressure regulating spring case 30; A connecting body (90) whose lower part is coupled to the upper part of the automatic pressure regulating spring case (30) and has an installation space (a1) therein; A pressure control handle (100) having a threaded hole (nh) to be screwed to a plurality of threads (n) formed on the upper outer circumference of the connecting body (90); A second spring (s2) installed at the inner upper part of the installation space (a1), and a lower part of the second spring (s2) is located at the upper part of the spool (80) and the second spring (s2) is installed on the spool (80). It is installed and raised inside the valve chamber 24 of the automatic pressure regulating spring case 30 to be raised and lowered by the elastic force of (s2), and the through passage 61 of the first ceramic sheet 60 is formed by the ceramic ball 70. It is provided at the lower part to open and close, and is characterized by including an automatic adjustment shaft 110 equipped with a first spring s1 at the lower part.

The automatic pressure control body cover 10 forms an inlet hole 11 and an outlet 12 that are assembled with the water intake passage 23, and the on-off valve space 14 where the on-off valve 40 is located behind the outlet 12. ) is formed so that the on-off valve 40 is located, a drain bolt hole is formed at the bottom, the drain bolt 13 is assembled, and the chemical solution entering the intake passage 23 passes through the inlet hole 11 and the outlet 12 through the valve. It is characterized in that it is discharged into the room (24).

In addition, the opening/closing valve 40 has an installation portion 41 formed inside, an assembly hole 42a formed at the bottom, and a main body 42 provided with a plurality of discharge holes 42b and a body hole 42c on the outer circumference. ), and is composed of a pressing member 45 that presses the main body 42, a lower assembly cap 44 whose outer circumference is coupled to the inner circumference of the assembly hole 42a and has an inlet hole 43, and A spring (s) and a pressure sensing member (45) are sequentially installed from the top to the bottom of the installation portion (41), and the pressure sensing member (45) is located in the valve chamber (24) of the automatic pressure regulating body (20). It is characterized in that it is installed to open and close the discharge hole (42b) and the main body hole (42c) by being lifted up and down inside the installation portion (41) by pressure.

In addition, a first through hole (b1) formed through the connection body 90 from one side to the other side, a plurality of coupling portions 101 are installed at the lower portion, and a second through hole (b2) is formed in both of the coupling portions 101. The outer circumference of the connecting body 90 is inserted between the formed lever handle 102 and both the coupling portions 101, and a fixing pin ( b3) is characterized in that it is composed of insertion and bonding.

The present invention is an automatic pressure control spring case having an inlet connected to a communication bolt connected to the outlet of a power sprayer, an automatic pressure control body having a discharge port and an inlet passage, and an automatic pressure control body connected to the inlet passage and having an outlet port. It consists of a pressure control handle provided on the connection body coupled to the automatic pressure control spring case, an open/close valve and an automatic control shaft inside the upper and automatic pressure control body, and a power sprayer equipped with a ceramic ball and spring, and a separate There is a new effect that facilitates the convenience of using the power sprayer by allowing the water return action due to the overpressure relief operation to occur automatically and smoothly within the device itself without the need for an assistant.

In addition, the present invention has the new effect of preventing damage to the outlet by preventing overloading and improving the safety of various sealing components.

In addition, the present invention installs a pressure sensing closing part inside the on-off valve installed around the inner circumference of the inlet of the automatic pressure regulating body, so that when high pressure water flows into the inlet, it operates inside the on-off valve and senses pressure on the discharge hole of the on-off valve. By closing it with a closed part, there is a new effect of preventing overflow due to high pressure water pressure at the beginning of the inlet of the automatic pressure regulating body by first detecting and closing the high pressure water pressure flowing into the automatic pressure regulating body through the pressure sensing closing part.

1 is a perspective view according to the present invention.
Figure 2 is an exploded perspective view according to the present invention.
Figure 3 is a schematic cross-sectional view according to the present invention.
Figures 4a and 4b are operational diagrams according to the present invention.
Figure 5 is a schematic diagram showing the separated state of the on-off valve according to the present invention.
Figure 6 is an exemplary installation diagram according to the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as limited to the embodiments described in detail below. This example is provided to more safely explain the present invention to those with average knowledge in the art.

Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that identical members in each drawing may be indicated by the same reference numerals.

Figure 1 is a perspective view according to the present invention, Figure 2 is an exploded perspective view according to the present invention, Figure 3 is a schematic cross-sectional view according to the present invention, Figures 4a and 4b are operational diagrams according to the present invention, and Figure 5 is a schematic diagram according to the present invention. It is a schematic diagram showing the separated state of the on-off valve according to the invention, and Figure 6 is an illustration of installation according to the present invention.

The automatic safety valve for a power sprayer according to the present invention will be described in detail with reference to FIGS. 1 to 6 as follows.

The automatic safety valve for a power sprayer according to the present invention is used in a power sprayer (200) and includes an automatic pressure control body cover (10), an automatic pressure control body (20), an automatic pressure control spring case (30), an opening and closing valve (40), and It consists of a piston guide (50), a ceramic ball (70), a spool (80), a connection body (90), a pressure control knob (100), and an automatic adjustment shaft (110).

The power sprayer 200 is operated by receiving power from a motor or engine, and as shown in FIG. 6, the power sprayer has a discharge port 21 connected to the spray nozzle for discharging the chemical liquid, and a discharge port 21 for compressing the chemical liquid. It is equipped with a cylinder block (c4) in which a pump (c3) and a plurality of pistons are installed to reciprocate, an inlet (c5) connected to the chemical liquid tank to suck in the chemical liquid, and an overflow port (31) connected to the chemical liquid tank to automatically adjust the pressure. It consists of an automatic safety valve (300) that is controlled by .

The automatic safety valve 300 is configured to be airtightly connected to the outlet of the power sprayer 200.

The automatic pressure adjustment body cover 10 is airtightly connected to the automatic pressure adjustment body 20 of the power sprayer 200 through bolt and nut fastening, as shown in FIGS. 2 and 3. The automatic pressure adjustment body cover ( 10) forms an inlet hole 11 and an outlet 12 that are assembled with the water intake passage 23 of the automatic pressure regulating body 20, and an on-off valve space where an on-off valve 40 is located at the rear of the outlet 12. The opening/closing valve 40 is located by forming a part 14, and a drain bolt hole is formed in the lower part to assemble the drain bolt 13 so that the chemical solution entering the intake passage 23 passes through the inlet hole 11 and reaches the outlet 12. It passes through and is discharged into the valve chamber (24).

The drain bolt 13 discharges the chemical solution remaining in the automatic safety valve 300 after using the power sprayer 200, preventing the chemical liquid from freezing in the cold winter and preventing the automatic safety valve 300 of the power sprayer 200 from freezing. It prevents damage.

That is, the automatic pressure regulating body cover (10) allows the chemical solution that enters the inlet passage (23) through the inlet passage (21) of the automatic pressure regulating body (20) into the valve chamber (24) through the inlet hole (11) and outlet (12). It is discharged so that the chemical liquid is discharged through the discharge port.

The automatic pressure control body (20) is connected to the outlet (c2) of the power sprayer (200) through the automatic pressure control body cover (10) and has an inlet port (21) that communicates with each other, a discharge port (22), and an intake passage (23). and a valve chamber 24.

As shown in Figures 2 and 3, the automatic pressure adjustment body 20 has a plurality of automatic pressure adjustment body covers 10 at the bottom and an automatic pressure adjustment spring case 30 and bolts (not shown) at the top. Each bolt hole (not shown) is formed and is airtightly connected and assembled by fastening a bolt (not shown) and a nut (not shown).

That is, the automatic pressure regulating body 20 is composed of the inlet 21, the outlet 22, the inlet passage 23, and the valve chamber 24 that communicate with each other.

Accordingly, the water intake port 21, the water intake passage 23, and the valve chamber 24 are formed vertically, and the discharge port 22 is formed horizontally and connected to the spray nozzle equipped with the cock.

As shown in FIGS. 1 to 3, the automatic pressure regulation spring case 30 is connected to the upper part of the automatic pressure regulation body 20 and has an outlet port 31 and a valve chamber 32 that communicate with the water intake passage 23. It is comprised of:

The automatic pressure regulating spring case 30 is airtightly connected to the upper part of the automatic pressure regulating body 20 by fastening bolts (not shown), and the spool 80 and the connecting body 90 are assembled and installed on the upper part. As such, the automatic pressure regulation spring case 30 is formed with the water outlet 31 and the valve chamber 32, which communicate with the water intake passage 23 of the automatic pressure regulation body 20, respectively, and the automatic pressure regulation The lower part of the spring case 30 and the upper part of the automatic pressure regulating body 20 are formed with a plurality of bolt holes (not shown) into which bolts (not shown) are inserted.

Therefore, the outlet port 31 is formed vertically on the outside of the automatic pressure regulation spring case 30 and connected to the chemical tank, and the valve chamber 32 is formed horizontally on the inside of the automatic pressure regulation spring case 30. In this case, The valve chamber 32 of the automatic pressure regulation spring case 30 is assembled in a straight line with the upper part of the valve chamber 24 of the automatic pressure regulation body 20, and the automatic pressure regulation spring is installed so that the pressure is always maintained constant. The overflow port 31 of the case 30 and the discharge port 22 of the automatic pressure regulating body 20 are formed in a straight line.

As shown in FIGS. 2, 3, and 5, the opening/closing valve 40 has an installation portion 41 formed inside, an assembly hole 42a formed at the bottom, and a plurality of discharge holes 42b on the outer circumference. It consists of a main body 42 provided with a body hole 42c, a pressing member 45 that presses the main body 42, an outer circumference coupled to the inner circumference of the assembly hole 42a, and an inlet hole 43. ) is provided with a lower assembly cap 44.

The opening/closing valve 40 is assembled and installed inside the valve chamber 24 of the automatic pressure regulating body 20 to remove foreign substances in the drug entering from the water inlet 21, and when the chemical liquid in the valve chamber 24 is high pressure, the main body hole ( This is to control the pressure of the chemical liquid by opening 42c) and sending it to the drainage hole 51 through the drainage space 29. An installation part 41 is formed inside the opening and closing valve 40, and an assembly hole 42a is located at the bottom. ) is formed and consists of a main body 42 provided with a plurality of discharge holes 42b on the outer circumference.

In addition, the outer circumference is coupled to the inner circumference of the assembly hole (42a) and is composed of a lower assembly cap (44) having an inlet hole (43).

In addition, a joining member 45 is installed on the upper part of the lower assembly cap 44, and the communication valve 10 is assembled to the automatic pressure regulating body 20 to fix the opening and closing valve 40. The joining member 45 is placed between the on-off valves 40 to pressurize the on-off valves 40 with a uniform force during bolt assembly and prevent damage to the on-off valves 40.

In addition, a spring (s) and a pressure sensing member (45) are sequentially installed from the top to the bottom of the installation portion (41).

Meanwhile, the pressure sensing member 45 is raised and lowered from the inner circumference to the outer circumference of the installation portion 41 by the elastic force of the spring s to open and close the discharge hole 42b and the main body hole 42c. It is installed and configured to do so.

The pressure sensing member 45 provided inside the on-off valve 40 as described above prevents a large amount of chemical liquid from entering through the inlet 21 or being discharged through the discharge port 22, thereby preventing the automatic pressure regulating body 20 from operating. When the internal pressure becomes higher than a predetermined level, the pressure sensing member 45 assembled in the main body 42 of the on-off valve 40 detects the pressure through the main body hole 42c formed at the rear of the main body 42. By pressing the rear of the sensing member 45, the pressure sensing member 45, which was blocking the main body hole 42c of the main body 42, is spaced apart from the main body hole 42c, and the high-pressure chemical solution is released into the main body hole (42c). Through 42c), the chemical liquid flows back into the space spaced between the pressure sensing member 45 and the main body hole 42c, and is introduced into the drainage hole 51 through the drainage space 29, so that the chemical liquid flows into the drainage hole 31. It is discharged and the pressure within the automatic pressure regulating body 20 is lowered, and when the pressure within the automatic pressure regulating body 20 is lowered, the pressure sensing member 45 contacts the main body hole 42c of the main body 42. By blocking the main body hole (42c), the chemical liquid is not discharged into the drainage space (29) but is discharged through the discharge port (31).

In addition, the spring (s) is a pressure sensing member when the chemical liquid is not received through the inlet port (21) or when the pressure of the automatic pressure control body (20) is lowered and the pressure becomes less than the elastic force of the spring (s). (45) is spaced apart from the main body hole (42c) so that the chemical liquid is not discharged to the discharge port (22), and when the pressure of the automatic pressure regulating body (20) increases and reaches a pressure higher than the elastic force of the spring (s), the pressure sensing member (45) is brought into contact with the main body hole (42c) to prevent the chemical liquid from being discharged into the main body hole (42c), thereby discharging the chemical liquid through the discharge port (22).

The piston guide 50 is installed around the inner circumference of the valve chamber 24 of the automatic pressure regulating body 20 and guides the up and down movement of the automatic adjustment shaft 110. The piston guide 50 A drainage hole 51 connected to the commercial drainage space 29 is formed in the upper part of one side, and an inlet hole 52 is formed in the lower center of the piston guide 50.

The first ceramic sheet 60, the ceramic ball 70, and the spool 80 are sequentially built into the valve chamber 32 of the automatic pressure regulating spring case 30, and discharge water through the overflow port 31. It is structured as possible.

Meanwhile, a through passage 61 is formed vertically through the center of the first ceramic sheet 60, and the ceramic ball 70 opens and closes the through passage 61 of the first ceramic sheet 60. It is composed of:

The axial groove 71 is formed in the upper center of the ceramic ball 70, the lower surface is made flat, and the support shaft 81 protruding from the lower part of the spool 80 is inserted into the axial groove 71 in the upper center and the lower surface is formed. The plane opens and closes the through passage 61 of the first ceramic sheet 60.

The spool 80 is configured to assemble the ceramic balls 70 and guide the up and down movement of the ceramic balls 70.

And the axial groove 71 is formed in the upper center of the ceramic ball 70, and the support shaft 81 is inserted into the axial groove 71 of the ceramic ball 70 in the lower center of the spool 80. It is constructed to protrude.

In addition, a plurality of packings (not shown) are installed on the outer diameter of the spool 80.

As shown in Figures 2 and 3, the connecting body 90 is configured to have a lower part coupled to the upper part of the automatic pressure regulating spring case 30 and an installation space a1 therein, and a pressure adjustment bolt ( 110) assemble.

A second spring (s2), a spool (80), and a ceramic ball (70) a) are installed inside the installation space (a1).

A pressure control handle (100) is installed on the outside of the connection body (90).

As shown in FIG. 2, the pressure control valve 110 is configured to have a space so as to be screwed onto a plurality of screw threads (n) formed around the upper inner circumference of the connection body 90.

Inside the space, a second spring (s2) and a spring support member (100a) are installed at the top.

The second spring (s2) presses the spool (80) installed in the space of the connecting body (90) to open and close the through passage (61) of the first ceramic sheet (60).

The spring support member (100a) has a circular arc at the top and a base at the bottom, and is placed in the space of the pressure control valve 110. The pillar is in contact with the upper end of the second spring (s2) to support the second spring (s2). Since the arc flows in contact with the pressure control valve 110, it is used to center the second spring (s2).

In addition, the pressure control handle 100 is assembled by making a first through hole (b1) formed through the connection body 90 from one side to the other side.

The first through hole (b1) is formed as a long hole so that the fixing pin (b3) assembled in the first through hole (b1) can move differently.

It is composed of a lever handle 102 in which a plurality of coupling parts 101 are installed at the lower part of the connecting body 90 and second through holes b2 are formed in both coupling parts 101.

The outer circumference of the connecting body 90 is inserted between the two coupling portions 101, and a fixing pin (b3) is inserted and coupled to the first and second through holes (b1.b2).

In addition, the pressure control bolt 100 is adjusted to appropriately adjust the discharge pressure of the chemical solution and the amount of water return.

The lower part of the second spring (s2) is located at the upper part of the spool (80), so that the spool (80) is raised and lowered by the elastic force of the second spring (s2) of the automatic pressure regulating spring case (30). It is installed and raised inside the valve chamber 24 and raises and lowers the ceramic ball 70 to bring it into close contact or form a gap between the first ceramic sheet 60 and the ceramic ball 70 to open and close the first ceramic ball 70. It is composed of a spring (s1).

That is, when the chemical liquid is not discharged through the discharge port 22, the chemical liquid pressure in the valve chamber 24 increases, and overpressure occurs in the valve chamber 24, the chemical liquid flows through the through passage 61 of the first ceramic sheet 60. Pressure is applied to the lower surface of the ceramic ball 70, and when the pressure applied to the ceramic ball 70 becomes greater than the pressing force of the spring s2, the spring s2 is pressed upward and the ceramic ball 70 moves upward. As it moves, a gap is created between the first ceramic sheet 60 and the ceramic ball 70, and as the chemical liquid moves into the upper valve 30 between the through passages 61 of the first ceramic sheet 60, the chemical liquid flows into the overflow port ( 31), the high-pressure chemical liquid is discharged through the overflow port 31, and when the pressure in the valve chamber 24 becomes less than the pressure of the spring s2, the first ceramic sheet ( 60) is moved downward and comes into contact with the ceramic ball 70, blocking the through passage 61 so that the chemical liquid is not discharged to the automatic pressure regulating spring case 30 through the overflow port 31.

In addition, the automatic adjustment shaft 110 is built to be movable up and down within the piston guide 50 to operate the ceramic ball 70, and the upper central portion of the automatic adjustment shaft 11 is provided with the 1. A rod 111 is formed that penetrates the through passage 61 of the ceramic sheet 60 and contacts the ceramic ball 70.

Therefore, a plurality of packings (not shown) are mounted on the outer diameter of the automatic adjustment shaft 11.

The operation of the present invention is explained with reference to FIGS. 4A and 4B as follows.

In a state in which the opening/closing valve 40 and the ceramic ball 70 are closed, the chemical liquid compressed in the power sprayer 200 passes through the automatic pressure regulating body cover 10 and the inlet 21 of the automatic pressure regulating body 20. ), the chemical liquid flowing into the water inlet 21 pushes the pressure sensing member 45 of the on/off valve 40 to open the on/off valve 40, thereby opening the inlet 21. ) The chemical liquid flowing into the valve chamber 24 through the on-off valve 40 is transferred to the discharge port 22, and the chemical liquid transferred to the discharge port 22 is sprayed through a cock. Sprayed with a nozzle. At this time, a small amount of filtered water from the chemical solution flowing into the water intake passage 23 is always returned at a constant pressure through the water outlet 31 to prevent overload during the spraying process of the chemical solution discharged through the discharge port 22.

While spraying of the chemical solution continues normally without overpressure, the ceramic ball 70 is in airtight contact with the ceramic sheet 60 and blocks the through passage 61 of the ceramic sheet 60, but if In this state, when the cock of the spray nozzle is closed to stop spraying the chemical solution or when the discharge port (22) is blocked and the chemical pressure in the valve chamber (24) increases and overpressure occurs, the discharge port (21) Since the inflow chemical liquid cannot be discharged through the discharge port 22, the chemical liquid flowing into the valve chamber 24 through the on-off valve 40 flows into the piston guide 50 through the inlet hole 52. comes in.

And, as described above, by the pressure of the chemical liquid flowing into the lower part of the piston guide 50 through the inlet hole 52, the automatic adjustment shaft 110 automatically compresses the second spring s2 and moves upward. moves, and as a result, the rod 111 of the automatic adjustment shaft 110 pushes the ceramic ball 70 upward to open the through passage 61 of the first ceramic sheet 60. The filtered water flowing into the water intake passage 23 is returned to the chemical solution tank through the filtered water outlet 51, the through passage 61, and the filtered water outlet 31, and the pressure is automatically relieved.

As described above, when overpressure occurs, the water return action is automatically performed inside the automatic safety valve 300, so the water return action according to the overpressure relief operation is automatically and easily performed without the need for a separate assistant. This has the advantage of not only providing convenience in using the sprayer, but also improving the safety of various sealing parts.

In addition, in the present invention, as described above, the chemical liquid flowing into the water inlet 21 is smoothly returned to the chemical liquid tank through the outlet 31 when an overload occurs, so that, especially when the power sprayer 200 is used for the first time, it is structurally stable. Since it is not overloaded, it has the advantage of preventing damage to the outlet due to overload.

In addition, according to the present invention, the outlet port 31 is provided and the outlet water is discharged through the outlet port 31, so the pressure is structurally very constant and no overload occurs during spraying, so there is a risk of damage to the outlet port. The problem can be fundamentally solved, and in particular, when restarting work, the pressure is constant even when the spray nozzle cock is opened, so there is no initial instantaneous overload, which has the advantage of making the power sprayer safer to use.

Meanwhile, according to the present invention, as described above, the water intake passage 31 of the automatic pressure regulating spring case 30 is formed to penetrate to the outside, and the discharge pressure of the chemical liquid in the valve chamber 24 and the amount of water return are adjusted. You can use it.

The pressure control handle 100 is screwed to a plurality of screw threads (n) formed around the upper outer circumference of the connection body 90, and the pressure control handle 100 is turned on and off to increase the discharge pressure of the chemical solution and the water return amount of the still water. can be adjusted appropriately.

The embodiments according to the present invention described above are merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible. . Therefore, it will be understood that the present invention is not limited to the forms mentioned in the detailed description above.

Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached patent claims. In addition, the present invention should be understood to include all modifications, equivalents and substitutes within the spirit and scope of the present invention as defined by the appended claims.

10: Automatic pressure regulation body cover 20: Automatic pressure regulation body
21: Inlet 22: Discharge port
23: water intake passage 24: valve room
30: Automatic pressure regulating spring case 31: Yeosu-gu
32: Valve room 40: Automatic pressure control valve
41: Installation part 42a: Assembler
42b: discharge hole 43: inlet hole
44: lower assembly cap 45: pressure sensing member
50; Piston guide 51: Yeosugong
60: Ceramic sheet 70: Ceramic ball
80: Spool 90: Connection body
100: pressure control knob 101: coupling part
102: lever handle 110: automatic adjustment axis
a: Installation worker a1: Installation space department
b1: 1st through hole b2: 2nd through hole
s: spring s1: first spring
s2: 2nd spring

Claims (4)

An automatic pressure control body ( 20) and; An automatic pressure regulation spring case (30) connected to the upper part of the automatic pressure regulation body (20) and having a reservoir (31) and a valve chamber (32) communicating with the water intake passage (23); An opening/closing valve (40) mounted between the water inlet (21) and the valve chamber (24) of the automatic pressure regulating body (20); A piston guide (50) installed in the valve chamber (24) of the automatic pressure regulating body (20), having a discharge hole (51) communicating with the water intake passage (23), and having an installation hole (a) therein; A ceramic sheet (60), a ceramic ball (70), and a bush (80) sequentially built into the valve chamber (32) of the automatic pressure regulating spring case (30); A connecting body (90) whose lower part is coupled to the upper part of the automatic pressure regulating spring case (30) and has an installation space (a1) therein; A pressure control handle (100) having a threaded hole (nh) to be screwed to a plurality of threads (n) formed on the upper outer circumference of the connecting body (90); A second spring (s2) installed at the inner upper part of the installation space (a1), and a lower part of the second spring (s2) is located at the upper part of the spool (80) and the second spring (s2) is installed on the spool (80). It is installed and raised inside the valve chamber 24 of the automatic pressure regulating spring case 30 to be raised and lowered by the elastic force of (s2), and the first ceramic sheet 60 is formed with the ceramic ball 70. An automatic safety valve for a power sprayer, characterized in that it is provided at the lower part to open and close the through passage (61) and includes an automatic adjustment shaft (110) provided with a first spring (s1) at the lower part. According to clause 1,
The automatic pressure control body cover 10 forms an inlet hole 11 and an outlet 12 that are assembled with the water intake passage 23, and the on-off valve space 14 where the on-off valve 40 is located behind the outlet 12. ) is formed so that the on-off valve 40 is located, a drain bolt hole is formed at the bottom, the drain bolt 13 is assembled, and the chemical solution entering the intake passage 23 passes through the inlet hole 11 and the outlet 12 through the valve. An automatic safety valve for a power sprayer, characterized in that it discharges into the room (24). According to clause 1,
The opening/closing valve 40 is composed of a main body 42 having an installation portion 41 formed therein, an assembly hole 42a formed in the lower portion, and a plurality of discharge holes 42b on the outer circumference, the assembly hole A lower assembly cap (44) with an outer circumference coupled to the inner circumference of (42a) and an inlet hole (43), and a spring (s) and a pressure sensing member (45) from the top to the bottom of the installation portion (41). It is configured to be installed sequentially, and the pressure sensing member 45 is raised and lowered from the inner circumference of the installation portion 41 by the pressure of the valve chamber 24 of the automatic pressure regulating body 20 to the discharge hole. (42b) and an automatic safety valve for a power sprayer, characterized in that installed to open and close the inlet hole (43). According to clause 1,
A first through hole (b1) of a long hole formed through the connection body 90 from one side to the other side, a plurality of coupling parts 101 are installed at the lower part, and a second through hole (b2) is provided on both of the coupling parts 101. The outer circumference of the connecting body 90 is inserted between the formed lever handle 102 and both the coupling portions 101, and a fixing pin ( An automatic safety valve for a power sprayer, characterized in that b3) is inserted and coupled.