A check valve with a medium self-driven unbalanced valve core

Abstract

The present invention belongs to the field of valves, and particularly relates to a check valve with a medium self-driven unbalanced valve core. A check valve with a medium self-driven unbalanced valve core, the valve core structure of which has unequal areas. The remarkable effect of the present invention is that by opening through holes in the valve body and the valve core structure, two kinds of external fluids can form pressures on the valve core structure, and due to the asymmetrical structure of the valve core structure, a pressure difference between the upper and lower pressures is formed. At this time, only by adjusting the pressures of the two kinds of external fluids can the opening and closing of the valve be controlled, without the need for a dedicated valve switch, which maximally ensures the adaptive opening and closing of the valve.

Description

Technical Field

[0001] The present invention belongs to the field of valves, and particularly relates to a check valve with a medium self-driven unbalanced valve core. Background Art

[0002] The structure of the check valve is relatively mature, but the check valve with the traditional structure has great requirements for the valve installation direction, the medium flow direction, and the working conditions, which will greatly limit the application occasions of the check valve.

[0003] The structure of the check valve is relatively mature, but the check valve with the traditional structure has great requirements for the valve installation direction, the medium flow direction, and the working conditions, which will greatly limit the application occasions of the check valve.

[0004] For example, for a swing check valve, the sealing performance and the check function are ensured by relying on the gravity of the valve flap. The movement mode of the valve flap is a rotational movement: the forward medium presses on the surface of the valve flap at the inlet end to make the valve flap rotate along the medium flow direction, opening the valve; the reflux medium presses on the surface of the valve flap at the outlet end to achieve the check function. It can be used for horizontal pipelines or vertical pipelines. However, due to the limitations of its working principle and the movement mode of the valve flap, the swing check valve used on a vertical pipeline can only achieve the upward flow of the medium, and water hammer phenomenon is likely to occur when the valve checks, resulting in a sudden increase in the pressure in the pipeline. In severe cases, the valve and pipeline equipment will be damaged.

[0005] Another example is the lift check valve. Its working principle is similar to that of the swing check valve, but the movement mode of the valve flap is up and down movement, which requires that the valve can only be applied to horizontal pipelines.

[0006] Other check valves with traditional structures also have the following defects:

[0007] 1. It cannot be applied to both horizontal pipelines and vertical pipelines at the same time;

[0008] 2. It cannot achieve the opening and check functions for the medium flowing from each direction;

[0009] 3. The check speed is high, and water hammer and water hammer phenomena are likely to occur;

[0010] 4. It has relatively high requirements for the opening pressure difference. Summary of the Invention

[0011] The purpose of the present invention is to provide a check valve with a medium self-driven unbalanced valve core for the defects of the existing technology. This check valve can drive the valve through the medium.

[0012] The structural technology for achieving the purpose of the present invention: A check valve with a medium self-driven unbalanced valve core, and the valve core structure of this valve has unequal areas.

[0013] A check valve with a medium self-driven unbalanced valve core as described above, which includes a valve body, a valve seat is arranged on the valve body, a valve cover is arranged at the top of the valve body, and a medium self-driven unbalanced valve core structure is arranged in the cavity formed by the valve body, the valve seat and the valve cover. The side wall of the medium self-driven unbalanced valve core structure is sealed with the inner side wall of the valve body through a sealing ring. A part of the medium self-driven unbalanced valve core structure extends into the valve cover, and the side wall of this part is sealed with the side wall of the valve cover through a sealing ring.

[0014] A check valve with a medium self-driven unbalanced valve core as described above, wherein the medium self-driven unbalanced valve core structure is generally in a "T" shape, and a channel is arranged on the medium self-driven unbalanced valve core structure to connect the top and the tail end of the "T" shape.

[0015] A check valve with a medium self-driven unbalanced valve core as described above, wherein two non-connected channels are arranged on the side wall of the valve body, so that two external fluids can flow into from two opposite directions of the valve body.

[0016] A check valve with a medium self-driven unbalanced valve core as described above, wherein a channel is arranged on the side wall of the valve body, so that an external fluid flows into one side of the medium self-driven unbalanced valve core structure, and another channel is arranged on the valve cover, so that another external fluid flows into the other side of the medium self-driven unbalanced valve core structure.

[0017] A check valve with a medium self-driven unbalanced valve core as described above, wherein a spring is arranged between the medium self-driven unbalanced valve core structure and the valve cover.

[0018] The remarkable effect of the present invention is that by opening holes in the valve body and the valve core structure, two external fluids can form pressure on the valve core structure. And due to the asymmetric structure of the valve core structure, a pressure difference between the upper and lower pressures is formed. At this time, only by adjusting the pressures of the two external fluids, the opening and closing of the valve can be controlled, without a special valve switch, which maximally ensures the adaptive opening and closing of the valve. Brief Description of the Drawings

[0019] Figure 1 Schematic diagram of the vertical installation structure of a check valve with a medium self-driven unbalanced valve core.

[0020] Figure 2 Schematic diagram of the horizontal installation structure of a check valve with a medium self-driven unbalanced valve core.

[0021] Figure 3 Schematic diagram of the medium flow direction and the force principle of the valve flap.

[0022] In the figure: 1-valve body 2-valve seat 3-medium self-driven unbalanced valve core structure 4-sealing ring 5-spring 6-sealing ring 7-valve cover. Specific embodiments

[0023] A check valve with a medium self-driven unbalanced valve core, and the valve core structure of this valve has unequal areas.

[0024] As shown in the attached Figures 1 to 3 As shown, a check valve with a medium self-driven unbalanced valve core includes a valve body 1, a valve seat 2 is arranged on the valve body 1, a valve cover 7 is arranged at the top of the valve body 1, and a medium self-driven unbalanced valve core structure 3 is arranged in the cavity formed by the valve body 1, the valve seat 2 and the valve cover 7. The side wall of the medium self-driven unbalanced valve core structure 3 is sealed with the inner side wall of the valve body 1 through a sealing ring 4. A part of the medium self-driven unbalanced valve core structure 3 extends into the valve cover 7, and the side wall of this part is sealed with the side wall of the valve cover 7 through a sealing ring.

[0025] The described medium self-driven unbalanced valve core structure 3 is generally in a "T" shape, and a channel is arranged on the medium self-driven unbalanced valve core structure 3 to connect the top and the tail of the "T" shape.

[0026] Two complementary and communicating channels are arranged on the side wall of the valve body 1, so that two kinds of external fluids can flow into the valve body 1 from two opposite directions.

[0027] A spring 5 is arranged between the medium self-driven unbalanced valve core structure 3 and the valve cover 7.

[0028] The usage process of the valve in this application is generally as follows: The medium self-driven unbalanced valve core structure 3 divides the cavity formed by the valve body 1, the valve seat 2 and the valve cover 7 into two mutually isolated parts. For the convenience of introduction, the cavity containing the valve seat 2 is called space A, and the cavity containing the valve cover 7 is called space B. One end of the medium self-driven unbalanced valve core structure 3 abuts against the valve seat 2, and this part of the medium self-driven unbalanced valve core structure 3 is in contact with an external fluid (fluid C). Since the medium self-driven unbalanced valve core structure 3 tightly abuts against the valve seat 2, fluid C cannot enter space A. In addition, a channel is arranged on the valve body 1, and fluid C can enter space B through the channel. Another fluid (fluid D) enters space A through another channel on the valve body 1 (the other channel can also be arranged on the valve cover 7 instead of the valve body 1). At the same time, since the medium self-driven unbalanced valve core structure 3 itself is also provided with a channel, fluid D can enter the sealed space formed by the medium self-driven unbalanced valve core structure 3 and the valve cover 7 through the channel on the medium self-driven unbalanced valve core structure 3. At this time, since the geometric shape of the medium self-driven unbalanced valve core structure 3 is asymmetric up and down, the pressures of the two fluids C and D on the medium self-driven unbalanced valve core structure 3 are not the same. Therefore, by adjusting the pressures of fluids C and D, the opening and closing of the valve can be realized.

[0029] The medium generates an unbalanced force through the area difference of the valve core structure to drive the valve to open or close. It is applicable to the check valve structures such as straight-through, straight-through, Y-shaped and angle-shaped. A check valve with an unbalanced valve core structure driven by the medium is applicable to various connections such as butt welding and flange, can be installed on vertical pipes, horizontal pipes and inclined pipes, can meet various medium flow directions, and can be used in working conditions such as high pressure difference and low pressure difference, and drives the valve to open, seal and check through the unbalanced force.

Claims

1. A check valve with a medium self-driven unbalanced valve core, characterized in that: The spool structure of this valve has unequal areas; It includes a valve body (1), on which a valve seat (2) is provided, a valve cover (7) is provided at the top of the valve body (1), and a medium self-driven unbalanced spool structure (3) is arranged in the cavity formed by the valve body (1), the valve seat (2) and the valve cover (7). The side wall of the medium self-driven unbalanced spool structure (3) is sealed with the inner side wall of the valve body (1) through a sealing ring (4). A part of the medium self-driven unbalanced spool structure (3) extends into the interior of the valve cover (7), and the side wall of this part is sealed with the side wall of the valve cover (7) through a sealing ring; The described medium self-driven unbalanced spool structure (3) is generally in a "T" shape, and a channel is arranged on the medium self-driven unbalanced spool structure (3) to connect the top and the tail end of the "T" shape; Two non-communicating channels are arranged on the side wall of the valve body (1) so that two kinds of external fluids can flow in from two opposite directions of the valve body (1); One channel is arranged on the side wall of the valve body (1) so that an external fluid flows into one side of the medium self-driven unbalanced spool structure (3), and another channel is arranged on the valve cover (7) so that another external fluid flows into the other side of the medium self-driven unbalanced spool structure (3); A spring (5) is arranged between the medium self-driven unbalanced spool structure (3) and the valve cover (7).

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