Pressure-reducing flow-limiting valve

Abstract

The utility model discloses a pressure-reducing flow-limiting valve, which comprises a valve body, a valve cavity, a valve and a rubber plug, the valve body comprises a front cover and a rear cover, a piston moving along a central axis is arranged in the valve cavity, a rubber plug seat is arranged in a hollow inner cavity of the piston, the rubber plug is arranged in the rubber plug seat, a water outlet channel is arranged on the rear cover, and the valve is arranged in the water outlet channel. A throttling orifice plate is arranged on the water outlet channel, throttling orifices are formed in the throttling orifice plate, and the rear cover and the throttling orifice plate are of an independent split structure. A through hole with the adjustable hole diameter is formed in the throttling orifice plate, the through hole is communicated with the water inlet channel and the inner cavity of the piston, the distance between the rubber plug and the valve element is movably adjusted through the piston, and therefore the water flow is controlled, the water pressure is stable, a user can conveniently and stably adjust the water flow, and the hole diameter of the through hole in the throttling orifice plate can be adjusted according to the actual situation. A proper scheme can be provided for a user, so that the satisfaction degree of the user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve switch technical field, especially a kind of pressure reducing flow limiting valve. BACKGROUND

[0002] With the development of economy, people pursue high-quality life, water purifier enters thousands of households, various regions, the water pressure of various floor changes greatly, the opening and closing of water pump, the opening and closing of faucet cause water hammer effect, so that the water pressure generated instantaneously is several times or dozens of times of usual use.

[0003] Pressure reducing valve is widely used in commercial, household drinking machine, water purifier industry. In addition to the application of pressure reducing valve can stabilize water pressure, prevent water hammer impact, it can also reduce the design value of system pressure strength, reduce the cost of whole machine and parts, prolong the service life of whole machine.

[0004] The existing water flow straight-through type pressure reducing valve, its water outlet hole is fixed at factory, cannot adjust water outlet hole size according to actual situation of user, so its adaptability is poor. INVENTION CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a pressure reducing flow limiting valve, detachable throttle orifice plate is arranged, throttle orifice plate with aperture size suitable for assembly can be arranged according to actual situation, to overcome the deficiency of prior art.

[0006] In order to solve the above technical problem, the technical scheme of the utility model is as follows: the utility model provides a pressure reducing flow limiting valve, including valve body, valve cavity, valve, rubber plug, the valve body includes front cover and rear cover, the valve cavity is provided with movable piston along central axis, the hollow inner chamber of the piston is provided with rubber plug seat, the rubber plug is installed in rubber plug seat, the rear cover is provided with water outlet passage, the water outlet passage is provided with throttle orifice plate, the throttle orifice plate is provided with throttle orifice, the rear cover and throttle orifice plate are independent split structure.

[0007] The outer wall of the piston is provided with protruding ring, one end of the spring is pressed against the protruding ring, and the other end is pressed against the inner cavity bottom of the front cover.

[0008] One side of the protruding ring is provided with piston O-shaped ring.

[0009] The front cover and the rear cover are threadedly connected to form a valve cavity, the front cover is provided with a front cover insertion rod on the outside and a valve core on the inside, and the front cover insertion rod and the valve core are hollowly communicated to form a water inlet passage.

[0010] The valve core and the piston inner chamber are slidably connected, and the valve core and the piston inner chamber connection are provided with valve core O-shaped ring.

[0011] The water outlet channel is externally provided with a claw connecting part, the claw connecting part is connected with the three-part cover to form a connecting part inner cavity, the three-part cover is buckled with the three-part claw, and the connecting part inner cavity is provided with a claw O-shaped ring.

[0012] By adopting the technical scheme, the following beneficial effects are achieved:

[0013] 1) The distance between the rubber plug and the valve core is adjusted by the piston, so as to control the water flow, stabilize the water pressure, and facilitate the user to stably adjust the water quantity.

[0014] 2) According to the actual situation, the throttling orifice plate with a size-adapted aperture is assembled, a suitable scheme is provided for the user, good adaptability is achieved, and the satisfaction of the user is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a sectional view of the pressure-reducing flow-limiting valve.

[0016] Fig. 2 It is a whole structure view of the pressure-reducing flow-limiting valve.

[0017] Among them, the meaning of the reference signs is as follows:

[0018] 1, front cover insertion rod, 2, front cover, 3, spring, 4, valve core O-shaped ring, 5, valve core, 6, rubber plug, 7, piston O-shaped ring, 8, rear cover, 9, claw O-shaped ring, 10, three-part cover, 11, three-part claw, 12, piston, 13, throttling orifice plate, 15, rubber plug seat. DETAILED DESCRIPTION

[0019] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model and cannot be understood as a limitation of the utility model.

[0020] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection. It can also be detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0021] For example, Figs. 1-2As shown, a pressure reducing and flow limiting valve includes a valve body, a valve cavity, a valve, and a rubber plug 6. The valve body includes a front cover 2 and a rear cover 8. A piston 12 is arranged in the valve cavity and moves along a central axis. A hollow inner cavity of the piston 12 is provided with a rubber plug seat 15. The rubber plug 6 is installed in the rubber plug seat 15. A water outlet passage is arranged on the rear cover 8. A throttle orifice plate 13 is arranged on the water outlet passage. Throttle orifices are arranged on the throttle orifice plate 13. The rear cover 8 and the throttle orifice plate 13 are independently formed.

[0022] Preferably, the throttle orifice plate is detachable. According to actual conditions of a user, a throttle orifice plate with a size of an orifice adapted to a requirement can be assembled into the water outlet passage by means of adhesion or buckling.

[0023] An outer wall of the piston 12 is provided with a protruding ring. One end of a spring 3 abuts against the protruding ring, and the other end of the spring 3 abuts against a bottom of an inner cavity of the front cover 2. The protruding ring is provided with a piston O-ring 7 on one side.

[0024] The front cover 2 and the rear cover 8 are threadedly connected to form the valve cavity. The front cover 2 is provided with a front cover insertion rod 1 on an outer side thereof, and is provided with a valve core 5 on an inner side thereof. The front cover insertion rod 1 is hollowly communicated with the valve core 5 to form a water inlet passage.

[0025] The valve core 5 is slidably connected with the inner cavity of the piston 12. The valve core 5 is provided with a valve core O-ring 4 at a connection position between the valve core 5 and the inner cavity of the piston.

[0026] The water outlet passage is provided with a claw connection portion. The claw connection portion is buckled with a three-part cover 10 to form an inner cavity of the connection portion. The three-part cover 10 is buckled with a three-part claw 11. The inner cavity of the connection portion is provided with a claw O-ring 9.

[0027] The working principle is as follows:

[0028] When water pressure is too large, due to the throttle orifice plate, water pressure in an inner wall of the rear cover is increased, so that the piston moves towards the valve core, the spring is contracted, the piston drives the rubber plug to move, the distance between the rubber plug and the outlet of the valve core is reduced, water flow is reduced, the water pressure in the inner wall of the rear cover is reduced, and the water pressure in the inner wall of the rear cover, the water pressure of the outlet of the valve core, and the spring force are balanced.

[0029] When the water pressure is reduced, the spring is stretched to drive the piston to move towards the throttle orifice plate. The piston drives the rubber plug to move. The distance between the rubber plug and the outlet of the valve core is increased. The water flow is increased. The water pressure in the inner wall of the rear cover, the water pressure of the outlet of the valve core, and the spring force are balanced.

[0030] Since the spring is fixed, the water pressure is stable when the spring force and the water pressure are balanced, so that the purpose of stabilizing the water pressure is achieved. According to actual requirements, a throttle orifice plate with an orifice size adapted to a requirement can be assembled, so that a relatively stable water flow meeting the requirements of a user can be obtained.

[0031] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art should understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, the scope of the utility model is defined by the claims and its equivalent replacements, and the improvements and the like without creative labor should be included in the protection scope of the utility model.

Claims

1. A pressure reducing flow limiting valve comprising a valve body, a valve chamber, a valve gate, a rubber plug (6), characterized in that, The valve body comprises a front cover (2) and a rear cover (8), a piston (12) is arranged in the valve cavity and moves along the central axis, a hollow inner cavity of the piston (12) is provided with a rubber plug seat (15), the rubber plug (6) is installed in the rubber plug seat (15), a water outlet channel is arranged on the rear cover (8), a throttle orifice plate (13) is arranged on the water outlet channel, throttle orifices are arranged on the throttle orifice plate (13), and the rear cover (8) and the throttle orifice plate (13) are independently and separately structured.

2. The pressure reducing flow limiting valve of claim 1, wherein An outer wall of the piston (12) is provided with a protruding ring, one end of a spring (3) abuts against the protruding ring, and the other end of the spring (3) abuts against the bottom of the inner cavity of the front cover (2).

3. The pressure reducing flow limiting valve of claim 2, wherein One side of the protruding ring is provided with a piston O-shaped ring (7).

4. The pressure reducing flow limiting valve of claim 1, wherein The front cover (2) and the rear cover (8) are threadedly connected to form a valve cavity, a front cover insertion rod (1) is arranged on the outer side of the front cover (2), and a valve core (5) is arranged on the inner side of the front cover (2), the front cover insertion rod (1) and the valve core (5) are hollowly communicated to form a water inlet channel.

5. The pressure reducing flow limiting valve of claim 4, wherein The valve core (5) is slidably connected with the inner cavity of the piston (12), and the valve core (5) is provided with a valve core O-shaped ring (4) at the connection position with the inner cavity of the piston (12).

6. The pressure reducing flow limiting valve of claim 1, wherein A claw connecting portion is arranged outside the water outlet channel, the claw connecting portion is buckled with a three-part cover (10) to form a connecting portion inner cavity, the three-part cover (10) is buckled with a three-part claw (11), and the connecting portion inner cavity is provided with a claw O-shaped ring (9).

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