A pressure regulating valve assembly for a spraying machine

Abstract

The present invention discloses a pressure regulating valve assembly for a sprayer in the technical field of sprayer accessories, comprising a pressure regulating sleeve, an inner cavity of the pressure regulating sleeve is provided with a pressure regulating rod assembly, the left end of the pressure regulating rod assembly is provided with a magnet, the outer sleeve of the pressure regulating rod assembly is sleeved with a pressure regulating seat, the outer wall of one end of the pressure regulating rod assembly passing through the pressure regulating seat is also sleeved with a return spring, one end of the return spring is connected to a buffer gasket, the pressure regulating seat sealing ring is located at the end of the pressure regulating seat, a circuit board is installed on the left side wall of the inner cavity of the pressure regulating sleeve, and the signal lead wires of the circuit board are press-fitted through a wire pressing plate. The pressure regulating valve has a novel structure and stable performance, and once it fails, it only needs to find out the failed parts and replace them, instead of having to replace the entire part like a traditional pressure sensor once it fails, which has high maintenance cost in the later stage. Since the pressure regulating valve with such a structure has low production cost and relatively low production difficulty, the operation and maintenance cost of the sprayer is reduced.

Description

Technical Field

[0001] The invention discloses a pressure regulating valve assembly for a spraying machine, and particularly relates to the technical field of spraying machine accessories. Background Art

[0002] The pressure regulating valve assembly (i.e., pressure sensor, the function of the pressure regulating valve assembly on the sprayer is equivalent to that of the pressure sensor) used in the sprayer on the market is exquisite in appearance, compact in size, and accurate in pressure, but the disadvantage is that it is expensive. The current market competition is fierce, and brush sprayers cannot afford such high-end pressure sensors. Secondly, once the general sensors on the market fail, they cannot be repaired and can only be purchased again. Moreover, most of the pressure regulating mechanisms of brush sprayers on the market are mechanical pressure regulating valves, which have a small pressure regulating range and low pressure regulating accuracy. Mechanical pressure regulating valves completely rely on pressure to push the push rod or lever to push the micro switch or travel switch to cut off the power of the machine to pressurize the air, so brush machines are prone to frequent startup and easy to burn the machine or circuit board. To this end, we proposed a pressure regulating valve assembly for sprayers to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a pressure regulating valve assembly for a sprayer to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pressure regulating valve assembly for a sprayer, comprising a pressure regulating sleeve, an inner cavity of the pressure regulating sleeve is provided with a pressure regulating rod assembly, the left end of the pressure regulating rod assembly is provided with a magnet, the outside of the pressure regulating rod assembly is sleeved with a pressure regulating seat, the inner cavity of the pressure regulating seat is provided with a pressure regulating valve spring, and the pressure regulating valve spring is sleeved on the outer wall of the pressure regulating rod assembly, a reset spring is sleeved on the outer wall of one end of the pressure regulating rod assembly passing through the pressure regulating seat, one end of the reset spring is connected to a buffer gasket, and the other end thereof is connected to a pressure regulating seat sealing ring, the pressure regulating seat sealing ring is located at the end of the pressure regulating seat, a circuit board is installed on the left side wall of the inner cavity of the pressure regulating sleeve, and the signal lead wire of the circuit board is pressed into place through a wire pressing plate.

[0005] Preferably, one end of the pressure regulating valve spring abuts against the pressure regulating spring seat, and the other end thereof is connected to the stepped surface on the pressure regulating rod assembly.

[0006] Preferably, when the pressure-regulating rod assembly is pushed by the pressure in the pump body cavity, the pressure-regulating push rod will compress the pressure-regulating spring to cause displacement change.

[0007] Preferably, a Hall sensor is also installed on the circuit board, and the position of the circuit board corresponds to the installation position of the magnet.

[0008] Preferably, the circuit board is fixedly connected to the inner cavity wall of the voltage regulating sleeve by semicircular self-tapping.

[0009] Preferably, the wire pressing plate is fixedly connected to the inner cavity wall of the voltage regulating sleeve by self-tapping screws.

[0010] Preferably, the voltage regulating sleeve and the voltage regulating seat are fixedly connected by fastening screws.

[0011] Preferably, a cavity is provided between the pressure regulating sleeve and the pressure regulating seat to facilitate the movement of the pressure regulating rod assembly.

[0012] Preferably, a pressure regulating combined retaining ring is installed in the through groove starting from the right end of the pressure regulating seat, and the pressure regulating combined retaining ring is slidably connected to the outer wall of the pressure regulating rod assembly.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The appearance of the pressure regulating valve assembly is hexagonal column. The structure is mainly composed of two parts: a pressure valve and an adjusting sleeve. The working principle is to calculate the pressure of the pressure regulating spring when designing. That is, when it is compressed to a certain length during operation, the pressure of the internal cavity of the pump body has reached the maximum working pressure we set. The pressure can be adjusted steplessly between zero and the maximum pressure. The principle is that when the pressure pushes the valve stem, the valve stem will compress the spring, and the force of the spring is directly related to the compression stroke. Finally, the circuit board pressure regulation is to use the Hall sensor to sense the change in the distance of the magnet embedded at the end of the valve stem, resulting in different magnetic field strengths, thereby judging the pressure of the internal cavity of the pump body and implementing program control.

[0015] 2. The pressure regulating valve has a novel structure and stable performance. Once it fails, you only need to find the failed parts and replace them. Unlike traditional pressure sensors, which can only be replaced as a whole once they fail, the subsequent maintenance cost is high. Since the production cost of the pressure regulating valve with this structure is low and the production difficulty is relatively low, the operation and maintenance cost of the spray machine is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a cross-sectional view taken along the AA line of the present invention.

[0018] In the figure: 1 pressure regulating sleeve, 2 pressure regulating rod assembly, 3 pressure regulating spring seat, 4 pressure regulating valve spring, 5 pressure regulating seat, 6 pressure regulating combination retaining ring, 7 buffer gasket, 8 pressure regulating seat sealing ring, 9 return spring, 10 magnet, 11 circuit board, 12 self-tapping screws, 13 wire pressing plate, 14 semicircular self-tapping, 15 fastening screws. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-2 The present invention provides a technical solution: a pressure regulating valve assembly for a sprayer, comprising a pressure regulating sleeve 1, the inner cavity of the pressure regulating sleeve 1 is provided with a pressure regulating rod assembly 2, the left end of the pressure regulating rod assembly 2 is provided with a magnet 10, the outside of the pressure regulating rod assembly 2 is sleeved with a pressure regulating seat 5, the inner cavity of the pressure regulating seat 5 is provided with a pressure regulating valve spring 4, and the pressure regulating valve spring 4 is sleeved on the outer wall of the pressure regulating rod assembly 2, and a reset spring 9 is sleeved on the outer wall of one end of the pressure regulating rod assembly 2 that passes through the pressure regulating seat 5, one end of the reset spring 9 is connected to a buffer gasket 7, and the other end thereof is connected to a pressure regulating seat sealing ring 8, and the pressure regulating seat sealing ring 8 is located at the end of the pressure regulating seat 5, and a circuit board 11 is installed on the left side wall of the inner cavity of the pressure regulating sleeve 1, and the signal lead wire of the circuit board 11 is pressed through a wire pressing plate 13.

[0021] Among them, one end of the pressure regulating valve spring 4 is against the pressure regulating spring seat 3, and the other end is connected to the step surface on the pressure regulating rod assembly 2. The pressure regulating valve spring 4 is limited by the protrusions on the pressure regulating spring seat 3 and the pressure regulating rod assembly 2, so that the pressure regulating valve spring 4 can ensure running and compression on the pressure regulating rod assembly 2 during operation;

[0022] When the pressure regulating rod assembly 2 is pushed by the pressure of the pump body cavity, the pressure regulating push rod will compress the pressure regulating spring 4 to change its displacement. The change in the compression stroke of the pressure regulating spring 4 is the feedback of the change in the pressure of the cavity inside the pump body, ensuring that the electronic control can accurately collect the change in the pressure value;

[0023] A Hall sensor is also installed on the circuit board 11, and the position of the circuit board 11 corresponds to the installation position of the magnet 10. The magnet 10 at the end of the pressure regulating rod assembly 2 moves with it. At this time, the Hall sensor on the pressure regulating valve circuit board 11 can sense the change in the strength of the magnetic field of the magnet 10 and finally feed it back to the machine circuit board to achieve the regulation of the machine pressure.

[0024] The circuit board 11 is fixedly connected to the inner cavity wall of the voltage regulating sleeve 1 through the semicircular self-tapping 14. The circuit board 11 is connected to the voltage regulating sleeve 1 through the semicircular self-tapping 14, which is convenient for replacing the circuit board 11.

[0025] The wire pressing plate 13 is fixedly connected to the inner cavity wall of the voltage regulating sleeve 1 by self-tapping screws 12. The wire pressing plate 13 is connected to the voltage regulating sleeve 1 by self-tapping screws 12, which is convenient for disassembly and assembly, and is convenient for replacing the wire pressing plate 13;

[0026] The voltage regulating sleeve 1 and the voltage regulating seat 5 are fixedly connected by a fastening screw 15. When replacing the components inside the voltage regulating sleeve 1, it is only necessary to remove the fastening screw 15 and take out the voltage regulating sleeve 1. The replacement is simple and convenient.

[0027] A cavity is provided between the pressure regulating sleeve 1 and the pressure regulating seat 5 to facilitate the movement of the pressure regulating rod assembly 2. The setting of the cavity provides a prerequisite for the movement of the pressure regulating rod assembly 2.

[0028] A pressure regulating combined retaining ring 6 is also installed in the through groove starting from the right end of the pressure regulating seat 5, and the pressure regulating combined retaining ring 6 is slidably connected to the outer wall of the pressure regulating rod assembly 2. The pressure regulating combined retaining ring 6 is used in conjunction with the pressure regulating seat sealing ring 8 to ensure the sealing of the inner cavity of the pressure regulating seat 5.

[0029] Working principle: The pressure regulating valve assembly has a hexagonal cylindrical shape, and its structure mainly consists of two large parts: a pressure regulating rod assembly 2 and a pressure regulating sleeve 1. The elastic force of the pressure regulating valve spring 4 is calculated during design, that is, the pressure regulating valve spring 4 is compressed to a certain length during operation, which means that the Hall sensor on the pressure regulating sleeve 1 has sensed that the pressure in the internal cavity of the pump body has reached the set maximum working pressure, and the pressure can be adjusted steplessly between zero and the maximum pressure. The principle is that when the pressure pushes the pressure regulating rod assembly 2, the pressure regulating rod assembly 2 will compress the pressure regulating valve spring 4, and the force of the pressure regulating valve spring 4 is directly related to the compression stroke. Finally, the circuit board 11 regulates the pressure by sensing the distance change of the magnet 10 embedded at the end of the pressure regulating rod assembly 2 through the Hall sensor, resulting in different magnetic field strengths, thereby judging the internal cavity pressure of the pump body, and finally feeding back to the machine circuit board to achieve the regulation of the machine pressure. In this device, the pressure regulating spring seat 3 and the protrusion on the pressure regulating rod assembly 2 are used to realize The limit of the pressure regulating valve spring 4 is now carried out, so that the pressure regulating valve spring 4 can ensure the operation and compression on the pressure regulating rod assembly 2 during operation. The circuit board 11 is connected to the pressure regulating sleeve 1 by the semicircular self-tapping screw 14, which is convenient for replacing the circuit board 11, and the pressure pressing plate 13 is connected to the pressure regulating sleeve 1 by the self-tapping screw 12. It is easy to disassemble and assemble, and it is convenient to replace the pressure pressing plate 13. When replacing the components inside the pressure regulating sleeve 1, it is only necessary to remove the fastening screws 15 to take out the pressure regulating sleeve 1. The replacement is simple and convenient. The pressure regulating combination retaining ring 6 is used in conjunction with the pressure regulating seat sealing ring 8 to ensure the sealing of the inner cavity of the pressure regulating seat 5. The pressure regulating valve has a novel structure and stable performance. Once it fails, it only needs to find out the failed parts and replace them. There is no need to replace the entire part like the traditional pressure sensor once it fails, and the later maintenance cost is high. Since the pressure regulating valve with this structure has low production cost and relatively low production difficulty, the operation and maintenance cost of the sprayer is reduced.

[0030] 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 pressure regulating valve assembly for a spraying machine, characterized in that : comprising a pressure regulating sleeve (1), the inner cavity of the pressure regulating sleeve (1) is provided with a pressure regulating rod assembly (2), the left end of the pressure regulating rod assembly (2) is provided with a magnet (10), the outer portion of the pressure regulating rod assembly (2) is sleeved with a pressure regulating seat (5), the inner cavity of the pressure regulating seat (5) is provided with a pressure regulating valve spring (4), and the pressure regulating valve spring (4) is sleeved on the outer wall of the pressure regulating rod assembly (2), a return spring (9) is sleeved on the outer wall of one end of the pressure regulating rod assembly (2) that passes through the pressure regulating seat (5), one end of the return spring (9) is connected to a buffer gasket (7), and the other end is connected to a pressure regulating seat sealing ring (8), and the pressure regulating seat sealing ring (8) is located at the end of the pressure regulating seat (5), a circuit board (11) is installed on the left wall of the inner cavity of the pressure regulating sleeve (1), and the signal lead wire of the circuit board (11) is press-fitted through a wire pressing plate (13); When the pressure regulating rod assembly (2) is pushed by the pressure of the pump body cavity, the pressure regulating push rod will compress the pressure regulating spring (4) to cause displacement change; a Hall sensor is also installed on the circuit board (11), and the position of the circuit board (11) corresponds to the installation position of the magnet (10); the circuit board (11) is fixedly connected to the inner cavity wall of the pressure regulating sleeve (1) through a semicircular self-tapping screw (14); the pressure plate (13) is fixedly connected to the inner cavity wall of the pressure regulating sleeve (1) through a self-tapping screw (12); the pressure regulating sleeve (1) and the pressure regulating seat (5) are fixedly connected through a fastening screw (15); a cavity is provided between the pressure regulating sleeve (1) and the pressure regulating seat (5) to facilitate the movement of the pressure regulating rod assembly (2); a pressure regulating combined retaining ring (6) is also installed in the through groove starting from the right end of the pressure regulating seat (5), and the pressure regulating combined retaining ring (6) is slidably connected to the outer wall of the pressure regulating rod assembly (2); One end of the pressure regulating valve spring (4) abuts against the pressure regulating spring seat (3), and the other end of the pressure regulating valve spring is connected to the upper step surface of the pressure regulating rod assembly (2).

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