Water inlet valve fixed type double-cut-off ball valve middle cavity pressure balancing device

Abstract

The utility model discloses a water inlet valve fixed type double-cut-off ball valve middle cavity pressure balancing device which comprises a hydraulic control ball valve and a corrugated metal hose, a bypass pipeline is arranged on the side wall of the hydraulic control ball valve, the bypass pipeline is communicated with the upstream end and the downstream end of the hydraulic control ball valve, and the corrugated metal hose is connected with the hydraulic control ball valve. The side wall of the hydraulic control ball valve is provided with a blow-off pipeline communicated with a middle cavity of the hydraulic control ball valve, and the corrugated metal hose is respectively communicated with the downstream end of the bypass pipeline and the middle cavity of the hydraulic control ball valve. Meanwhile, the pressure enters the main valve middle cavity through the corrugated metal hose, at the moment, the upstream end, the downstream end and the main valve middle cavity all have pressure, the pressure of the upstream end, the pressure of the downstream end and the pressure of the main valve middle cavity are completely balanced, and the complete flat pressing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve equipment, in particular to a pressure balancing device for a middle cavity of a fixed double-blocking ball valve of an inlet valve. Background Art

[0002] The traditional water ball valve is a fixed double-block ball valve. When the valve is opened, due to the existence of the ball valve cavity, there is a large pressure difference between the upstream and downstream ends of the ball valve. In order to balance the pressure difference, water was flushed downstream through a bypass to achieve equal pressure difference between the upstream and downstream. However, there is no pressure in the valve cavity, and there is still a pressure difference between the upstream and downstream ends and the valve cavity, which cannot achieve the effect of pressure equalization. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] In view of the above-mentioned and / or existing problems in the use of the pressure balancing device for the middle cavity of the water inlet valve fixed double-blocking ball valve, the present utility model is proposed.

[0005] Therefore, the purpose of the utility model is to provide a pressure balancing device for the middle cavity of a fixed double-block ball valve of an inlet valve. When the hydraulically controlled ball valve is opened, water flows from the upstream through the bypass pipe to the downstream end, and at the same time enters the middle cavity of the main valve through the corrugated metal hose. At this time, there is pressure at the upstream end, the downstream end and the middle cavity of the main valve, and the pressure at the upstream end, the downstream end and the middle cavity of the main valve are completely balanced, achieving a completely equalized pressure effect.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A pressure balancing device for a central cavity of a water inlet valve fixed double-blocking ball valve, comprising:

[0008] A hydraulically controlled ball valve, wherein a bypass pipeline is disposed on the side wall of the hydraulically controlled ball valve, the bypass pipeline is connected to the upstream end and the downstream end of the hydraulically controlled ball valve, and a sewage discharge pipeline connected to the middle cavity of the hydraulically controlled ball valve is disposed on the side wall of the hydraulically controlled ball valve;

[0009] The corrugated metal hose is respectively connected with the downstream end of the bypass pipeline and the middle cavity of the hydraulically controlled ball valve.

[0010] As a preferred solution of the pressure balancing device for the middle cavity of a fixed double-block ball valve for an inlet valve described in the utility model, an expansion joint is provided at the liquid outlet end of the hydraulically controlled ball valve, and the expansion joint is connected to the downstream end of the hydraulically controlled ball valve by bolts.

[0011] As a preferred solution of the pressure balancing device for the middle cavity of a fixed double-blocking ball valve for an inlet valve described in the utility model, a mounting seat is provided at the bottom of the hydraulically controlled ball valve.

[0012] As a preferred solution of the central cavity pressure balancing device of a fixed double-blocking ball valve of an inlet valve described in the utility model, the downstream end of the bypass line is connected to a bypass line joint, and one end of the corrugated metal hose is connected to the bypass line joint.

[0013] As an optimal solution of the pressure balancing device for the middle cavity of a fixed double-block ball valve for an inlet valve described in the utility model, the sewage discharge pipeline is connected to a discharge pipe joint, the other end of the corrugated metal hose is connected to the discharge pipe joint, and O-ring flat sealing column end joints are respectively provided at both ends of the corrugated metal tube.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the fixed double-block ball valve middle cavity pressure balancing device for the water inlet valve, when the hydraulically controlled ball valve is opened, water flows from the upstream through the bypass pipe to the downstream end, and at the same time enters the main valve middle cavity through the corrugated metal hose. At this time, there is pressure at the upstream end, the downstream end and the main valve middle cavity, and the upstream end pressure, the downstream end pressure and the main valve middle cavity pressure are completely balanced, achieving a completely equalized pressure effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0016] Figure 1 It is a schematic diagram of the overall structure of a pressure balancing device for a central cavity of a fixed double-blocking ball valve for an inlet valve according to the utility model;

[0017] Figure 2 It is a schematic diagram of the exploded structure of a central cavity pressure balancing device of a fixed double-blocking ball valve for an inlet valve of the utility model;

[0018] Figure 3 The utility model is a pressure balancing device for the middle cavity of a fixed double-blocking ball valve for an inlet valve. Figure 2 Schematic diagram of the structure of part a;

[0019] Figure 4 The utility model is a pressure balancing device for the middle cavity of a fixed double-blocking ball valve for an inlet valve. Figure 2 Schematic diagram of the structure of part b.

[0020] 1. Hydraulic control ball valve; 2. Bypass pipeline; 3. Expansion joint; 4. Drain pipeline; 5. Bypass pipeline joint; 6. O-ring flat sealing column end joint; 7. Corrugated metal hose; 8. Drain pipe joint. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0022] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention in detail, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged at a general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0023] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] The utility model provides a pressure balancing device for the middle cavity of a water inlet valve fixed double-blocking ball valve. When the hydraulically controlled ball valve is opened, water flows from the upstream to the downstream end through a bypass pipeline, and at the same time enters the middle cavity of the main valve through a corrugated metal hose. At this time, there is pressure at the upstream end, the downstream end and the middle cavity of the main valve, and the pressure at the upstream end, the downstream end and the middle cavity of the main valve are completely balanced, thereby achieving a completely equalized pressure effect.

[0025] Figure 1-Figure 4 The structure diagram of an embodiment of a fixed double-block ball valve middle cavity pressure balancing device of the utility model is shown. Figure 1-Figure 4 In this embodiment, a pressure balancing device for the middle cavity of a water inlet valve fixed double-blocking ball valve is provided, and its main body includes a hydraulically controlled ball valve 1 and a corrugated metal hose 7.

[0026] When the hydraulically controlled ball valve 1 is opened, water flows from the upstream to the downstream end through the bypass pipe 2, and at the same time enters the main valve cavity through the corrugated metal hose 7. At this time, there is pressure at the upstream end, the downstream end and the main valve cavity, and the pressure at the upstream end, the downstream end and the main valve cavity are completely balanced to achieve a completely even pressure effect. Specifically, the side wall of the hydraulically controlled ball valve 1 is provided with a bypass pipe 2, and the bypass pipe 2 is connected to the upstream end and the downstream end of the hydraulically controlled ball valve 1. The side wall of the hydraulically controlled ball valve 1 is provided with a sewage pipe 4 connected to the cavity of the hydraulically controlled ball valve 1. In this embodiment, the liquid outlet end of the hydraulically controlled ball valve 1 is provided with an expansion joint 3, and the expansion joint 3 is connected to the downstream end of the hydraulically controlled ball valve 1 by bolts. A mounting seat is provided at the bottom of the hydraulically controlled ball valve 1, and the downstream end of the bypass pipe 2 is connected to a bypass pipe joint 5, and the sewage pipe 4 is connected to a drainage pipe joint 8;

[0027] The corrugated metal hose 7 serves as a connecting medium to connect the bypass line 2 with the middle cavity of the ball valve. Specifically, the corrugated metal hose 7 is respectively connected to the downstream end of the bypass line 2 and the middle cavity of the hydraulically controlled ball valve. In the present embodiment, one end of the corrugated metal hose 7 is connected to the bypass line connector 5, and the other end of the corrugated metal hose 7 is connected to the exhaust pipe connector 8. O-ring flat sealing column end connectors 6 are respectively provided at both ends of the corrugated metal tube.

[0028] Combination Figure 1-Figure 4 The present embodiment is a water inlet valve fixed double-block ball valve middle cavity pressure balancing device. The specific use process is as follows: when the hydraulic control ball valve 1 is opened, water flows from the upstream through the bypass pipe 2 to the downstream end, and at the same time enters the main valve middle cavity through the corrugated metal hose 7. At this time, there is pressure at the upstream end, the downstream end and the main valve middle cavity. The upstream end pressure, the downstream end pressure and the main valve middle cavity pressure are completely balanced, achieving a completely equalized pressure effect.

[0029] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pressure balancing device for the middle cavity of a fixed double-block ball valve of an inlet valve, characterized in that: include: A hydraulically controlled ball valve (1), wherein a bypass pipeline (2) is arranged on a side wall of the hydraulically controlled ball valve (1), wherein the bypass pipeline (2) is connected to an upstream end and a downstream end of the hydraulically controlled ball valve (1), and a sewage discharge pipeline (4) is arranged on the side wall of the hydraulically controlled ball valve (1) and is connected to a central cavity of the hydraulically controlled ball valve (1); A corrugated metal hose (7), wherein the corrugated metal hose (7) is respectively connected to the downstream end of the bypass pipeline (2) and the middle cavity of the hydraulically controlled ball valve.

2. According to claim 1, a pressure balancing device for the middle cavity of a fixed double-blocking ball valve for an inlet valve, characterized in that: The liquid outlet end of the hydraulically controlled ball valve (1) is provided with an expansion joint (3), and the expansion joint (3) is connected to the downstream end of the hydraulically controlled ball valve (1) via bolts.

3. The pressure balancing device for the middle cavity of a fixed double-block ball valve of an inlet valve according to claim 2 is characterized in that: A mounting seat is provided at the bottom of the hydraulically controlled ball valve (1).

4. The pressure balancing device for the middle cavity of a fixed double-blocking ball valve of a water inlet valve according to claim 3 is characterized in that: The downstream end of the bypass pipeline (2) is connected to a bypass pipeline joint (5), and one end of the corrugated metal hose (7) is connected to the bypass pipeline joint (5).

5. The pressure balancing device for the middle cavity of a fixed double-block ball valve for an inlet valve according to claim 4, characterized in that: The sewage discharge pipeline (4) is connected to a discharge pipe joint (8), the other end of the corrugated metal hose (7) is connected to the discharge pipe joint (8), and both ends of the corrugated metal hose are respectively provided with O-ring flat sealing column end joints (6).

Images