Pressure regulating valve for compressor

Abstract

The pressure regulating valve comprises a valve pipe, a pressure regulating piece is arranged in an inner cavity of the valve pipe, a valve column is connected to the upper portion of the inner cavity of the valve pipe in a threaded mode, a spring is arranged between the valve column and the pressure regulating piece, a valve element abuts against an air inlet of the valve pipe, a sliding cavity is formed in the valve column, and the sliding cavity is communicated with the valve column. The valve rod slides on the inner wall of the sliding cavity, the spring is arranged on the outer wall of the valve rod in a sleeving mode, a threaded cavity communicated with the sliding cavity is formed in the top of an inner cavity of the valve column, the inner diameter of the threaded cavity is larger than that of the sliding cavity, and a limiting column is connected into the threaded cavity in a threaded mode. According to the pressure regulating valve, due to the design of the pressure regulating piece, an original ball is replaced with the valve element, the sealing area between the valve pipe and the valve element is increased, the valve element has better sealing performance, meanwhile, the valve element moving upwards can stabilize movement of the valve element through cooperation of the valve rod and the sliding cavity, and therefore the valve element can stably move. And by means of the design that the spring is arranged on the outer wall of the valve rod in a sleeving mode, the spring can stably and elastically deform, and the situation that the valve element deviates or the spring is bent is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure regulating valves, in particular to a pressure regulating valve for a compressor. Background Art

[0002] A compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. It is the heart of the refrigeration system. It draws in low-temperature, low-pressure refrigerant gas from the intake pipe, compresses it through the motor-driven piston, and discharges high-temperature, high-pressure refrigerant gas to the exhaust pipe, powering the refrigeration cycle. This cycle progresses from compression to condensation (heat release) to expansion to evaporation (heat absorption).

[0003] According to the "New Pressure-Regulating Valve Device for Diaphragm Compressors" provided by Chinese Patent Authorization Announcement No. CN219911098U, the above document can avoid direct contact between the spring and the ball by arranging the limit plate, limit block and protrusion 2 (hereinafter referred to as the connecting parts) between the spring and the ball, resulting in the spring expanding outward in the later stage and causing the ball to fall into the interior of the spring, causing the device to fail.

[0004] Although the above literature has made certain improvements to the pressure regulating valve, it still has certain defects:

[0005] First, since the knob and the connector are connected by a spring, the elastic spring is likely to bend and deform after long-term use, which may affect the sealing effect between the ball bearing and the air inlet.

[0006] Secondly, when the pressure regulating valve is in use, when the gas pressure is higher than the spring pressure to a certain extent, the limit limit of the limit plate of the limit groove cannot be adjusted and controlled. When the spring has poor elasticity after long-term use, the channel between the ball and the air inlet hole cannot be effectively controlled.

[0007] Finally, a sealing ring is provided on the inner wall of the air inlet hole. Since the sealing ring is provided in the air inlet hole, the long-term air intake of the air inlet hole will provide an upward thrust for the sealing ring. Over time, the sealing ring will be at risk of falling off, thereby affecting the seal between the ball and the air inlet hole. Utility Model Content

[0008] To solve the above problems, that is, to solve the problems raised by the above background technology, the present invention proposes a pressure regulating valve for a compressor, comprising a valve pipe, an inner cavity of the valve pipe is provided with a pressure regulating member, and a valve post is threadedly connected above the inner cavity of the valve pipe, and a spring is provided between the valve post and the pressure regulating member;

[0009] The pressure regulating member includes an integrally formed valve core and valve stem, the valve core is pressed against the air inlet of the valve pipe, a sliding cavity is defined inside the valve column, the valve stem slides on the inner wall of the sliding cavity, and the spring is sleeved on the outer wall of the valve stem;

[0010] A threaded cavity communicating with the sliding cavity is formed at the top of the inner cavity of the valve column. The inner diameter of the threaded cavity is larger than the inner diameter of the sliding cavity. A limiting column is connected to the inner thread of the threaded cavity.

[0011] Preferably, an annular groove is provided at the air inlet of the valve tube corresponding to the valve core, a sealing ring is provided in the annular groove, and the valve core fits tightly with the sealing ring.

[0012] Preferably, a through hole is provided inside the valve column, and the through hole connects the threaded cavity with the inner cavity of the valve tube.

[0013] Preferably, a hexagonal groove is provided at the top of the limiting column, and a dust cap is provided at the top of the threaded cavity of the valve column.

[0014] Preferably, a positioning cavity corresponding to the spring is formed at the bottom end of the valve column, and the spring is pressed against the inner wall of the positioning cavity.

[0015] The beneficial technical effects of this utility model are as follows: Through the design of the pressure regulating component, the original ball bearing is replaced with a valve core, increasing the sealing area between the valve tube and the valve core, thereby achieving better sealing. Furthermore, the upward movement of the valve core is stabilized by the cooperation between the valve stem and the sliding cavity. The design of a spring sleeved on the outer wall of the valve stem allows for stable elastic deformation of the spring, preventing valve core deviation or spring bending. The design of a limit post controls the pressure regulating limit of the pressure regulating component, thereby enhancing the overall controllability of the pressure regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the main structure of the present utility model.

[0017] Figure 2 Shown is a main structural sectional view of the present invention.

[0018] Figure 3 Shown is a structural sectional view of the valve tube of the present invention.

[0019] Figure 4 Shown is a structural sectional view of the valve post of the present invention.

[0020] Figure 1: Valve tube; 11: Annular groove; 2: Pressure regulating member; 21: Valve core; 22: Valve stem; 3: Valve column; 31: Threaded cavity; 32: Sliding cavity; 33: Positioning cavity; 34: Through hole; 4: Spring; 5: Limiting column; 6: Sealing ring; 7: Dust cap. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] The utility model proposes a pressure regulating valve for a compressor, comprising a valve pipe 1, an inner cavity of the valve pipe 1 is provided with a pressure regulating member 2, and a valve column 3 is threadedly connected to the upper portion of the inner cavity of the valve pipe 1, a spring 4 is provided between the valve column 3 and the pressure regulating member 2, the pressure regulating member 2 comprises an integrally formed valve core 21 and a valve stem 22, the valve core 21 is pressed against the air inlet of the valve pipe 1, a sliding cavity 32 is provided inside the valve column 3, the valve stem 22 slides on the inner wall of the sliding cavity 32, the spring 4 is sleeved on the outer wall of the valve stem 22, a threaded cavity 31 is provided at the top of the inner cavity of the valve column 3 and is communicated with the sliding cavity 32, and the inner diameter of the threaded cavity 31 is larger than the inner diameter of the sliding cavity 32 The threaded cavity 31 is threadedly connected to a limiting post 5. Through the design of the pressure regulating component 2, the original ball is replaced by the valve core 21, and the sealing area between the valve tube 1 and the valve core 21 is increased, so that it has better sealing. At the same time, the upward-moving valve core 21 can stabilize the movement of the valve core 21 through the cooperation of the valve stem 22 and the sliding cavity 32, and the design of the spring 4 being sleeved on the outer wall of the valve stem 22 allows the spring 4 to also undergo stable elastic deformation, avoiding the offset of the valve core 21 or the bending of the spring 4. At the same time, through the design of the limiting post 5, the pressure regulating limit of the pressure regulating component 2 can be controlled, thereby making the overall controllability of the pressure regulating valve higher.

[0023] Specifically, an annular groove 11 is provided at the air inlet of the valve tube 1 corresponding to the valve core 21, and a sealing ring 6 is provided in the annular groove 11. The valve core 21 fits tightly with the sealing ring 6. The design of the annular groove 11 can place the sealing ring 6 therein to ensure sealing while preventing the sealing ring 6 from falling off, and facilitates the subsequent replacement of the sealing ring 6.

[0024] Specifically, a through hole 34 is opened inside the valve column 3, which connects the threaded cavity 31 with the inner cavity of the valve tube 1. Due to the sliding design of the valve stem 22 and the sliding cavity 32, gas can enter or exhaust the interior of the threaded cavity 31.

[0025] Specifically, a hexagonal groove is provided at the top of the limiting column 5, which can be used by staff to screw the limiting column 5. A dust cap 7 is provided on the top of the threaded cavity 31 of the valve column 3. This design prevents dust and impurities from entering the interior of the threaded cavity 31.

[0026] Specifically, a positioning cavity 33 corresponding to the spring 4 is formed at the bottom end of the valve column 3, and the spring 4 is pressed against the inner wall of the positioning cavity 33. This design ensures the fixed position of the spring 4 and makes its elastic deformation more stable.

[0027] Working Principle: When using a pressure regulating valve, it can be installed on the ventilation pipeline, and the knob valve column 3 can be turned according to actual conditions. The position of the valve column 3 can control the elasticity of the spring 4, and then the elastic pressure of the spring 4 can be adjusted according to the air pressure at the air inlet of the valve pipe 1, thereby adjusting the pressure at the air inlet and air outlet of the valve pipe 1. When gas enters the valve pipe 1, the gas pushes the valve core 21 upward, and then the gas can enter the air outlet. The upward moving valve core 21 can stabilize the movement of the valve core 21 through the cooperation of the valve stem 22 and the sliding cavity 32. At the same time, the design of the spring 4 being sleeved on the outer wall of the valve stem 22 allows the spring 4 to also stably deform elastically, avoiding the situation where the valve core 21 deviates or the spring 4 bends. At the same time, the design of the limit column 5 can control the pressure regulating limit of the pressure regulating component 2, thereby making the overall controllability of the pressure regulating valve higher.

[0028] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

[0029] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and are not intended to indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, article, or apparatus / device.

[0032] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A pressure regulating valve for a compressor, comprising a valve pipe (1), characterized in that: The inner cavity of the valve tube (1) is provided with a pressure regulating member (2), and a valve column (3) is threadedly connected above the inner cavity of the valve tube (1), and a spring (4) is provided between the valve column (3) and the pressure regulating member (2); The pressure regulating member (2) comprises an integrally formed valve core (21) and a valve stem (22); the valve core (21) is pressed against the air inlet of the valve tube (1); a sliding cavity (32) is provided inside the valve column (3); the valve stem (22) slides on the inner wall of the sliding cavity (32); and the spring (4) is sleeved on the outer wall of the valve stem (22); A threaded cavity (31) communicating with the sliding cavity (32) is provided at the top of the inner cavity of the valve column (3). The inner diameter of the threaded cavity (31) is larger than the inner diameter of the sliding cavity (32). The inner thread of the threaded cavity (31) is connected to the limiting column (5).

2. A pressure regulating valve for a compressor according to claim 1, characterized in that: An annular groove (11) is provided at the air inlet of the valve tube (1) corresponding to the valve core (21), a sealing ring (6) is provided in the annular groove (11), and the valve core (21) and the sealing ring (6) are tightly fitted.

3. The pressure regulating valve for a compressor according to claim 1, characterized in that: A through hole (34) is provided inside the valve column (3), and the through hole (34) connects the threaded cavity (31) with the inner cavity of the valve tube (1).

4. A pressure regulating valve for a compressor according to claim 1, characterized in that: A hexagonal groove is provided at the top of the limiting column (5), and a dust cap (7) is provided at the top of the threaded cavity (31) of the valve column (3).

5. The pressure regulating valve for a compressor according to claim 1, characterized in that: A positioning cavity (33) corresponding to the spring (4) is provided at the bottom end of the valve column (3), and the spring (4) is pressed against the inner wall of the positioning cavity (33).

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