Hydraulic control check butterfly valve

Abstract

The utility model provides a hydraulic control check butterfly valve which comprises a valve shell and a valve shaft rotationally sleeved in the valve shell, the periphery of the valve shaft is fixedly sleeved with a valve clack, the two ends of the valve shell are fixedly connected to an upstream pipeline and a downstream pipeline respectively, the valve clack is used for connecting and disconnecting the upstream pipeline and the downstream pipeline, and a first water pipe and a second water pipe are arranged on the valve shell respectively. The first water pipe and the second water pipe are located on the two sides of the valve clack respectively and communicate with the upstream pipeline, the second water pipe communicates with the downstream pipeline, one end of the first water pipe and one end of the second water pipe communicate with the hydraulic control assembly, and the hydraulic control assembly can adjust the opening degree of the valve clack through the pressure difference between the upstream pipeline and the downstream pipeline. According to the hydraulic control check butterfly valve, a passage can be synchronously opened and disconnected through the pressure difference of the upstream pipeline and the downstream pipeline through the hydraulic control assembly, the opening degree of the valve clack can be adjusted when the pressure difference is large, no extra device needs to be added, and the hydraulic control check butterfly valve is simple in structure, low in cost and easy to install and maintain.

Description

Technical Field

[0001] The utility model belongs to the field of butterfly valves, in particular to a hydraulically controlled non-return butterfly valve. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. The butterfly valve refers to a valve whose closing part (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays a role of cutting off and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating. The existing butterfly valve is mostly used to open and close the pipeline passage and does not have a check function. When the pipeline is closed, the problem of medium backflow will occur. Utility Model Content

[0003] In view of this, the utility model aims to propose a hydraulically controlled check butterfly valve to solve the problem that the existing butterfly valves are mostly used to open and close pipeline passages, do not have a check function, and the cost of adding an additional check module is high.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A hydraulically controlled check butterfly valve comprises a valve housing and a valve shaft rotatably sleeved therein, a valve disc fixedly sleeved on the periphery of the valve shaft, two ends of the valve housing are respectively fixedly connected to an upstream pipeline and a downstream pipeline, and the valve disc is used for opening and closing the upstream pipeline and the downstream pipeline, a first water pipe and a second water pipe are respectively arranged on the valve housing, and the first water pipe and the second water pipe are respectively located on both sides of the valve disc, the first water pipe is connected to the upstream pipeline, and the second water pipe is connected to the downstream pipeline, and one end of the first water pipe and one end of the second water pipe are respectively connected to a hydraulic control component, and the hydraulic control component can adjust the opening of the valve disc by the pressure difference between the upstream pipeline and the downstream pipeline.

[0006] Furthermore, the hydraulic control component includes a shell, and a piston is arranged in the shell, the piston can slide axially along the shell, and the two ends of the shell are respectively provided with a first through hole and a second through hole, the first through hole is connected to the first water pipe, and the second through hole is connected to the second water pipe, a support rod is installed at one end of the piston, and a first sliding hole is provided at one end of the shell, the outer periphery of the support rod is slidably connected to the first sliding hole, and one end of the support rod is connected to the valve shaft, the pressure difference between the upstream pipeline and the downstream pipeline can push the piston to slide in the shell, and the sliding piston can drive the valve shaft to rotate through the support rod.

[0007] Furthermore, the outer periphery of the shell is hinged to the outer periphery of the valve housing or a fixed position.

[0008] Furthermore, one end of the valve shaft is fixedly connected to one end of the connecting plate, and the other end of the connecting plate is hinged to one end of the supporting rod.

[0009] Furthermore, a transmission rod is fixedly installed at one end of the piston, a support rod is located at the other end of the piston, a second sliding hole is provided on the shell, the periphery of the transmission rod is slidably connected to the second sliding hole, one end of the transmission rod is fixedly connected to the movable end of the linear drive, and the periphery of the linear drive is hinged to the periphery of the valve shell or a fixed position.

[0010] Furthermore, a first pressure space is provided between one end of the piston and one end of the shell, the first water pipe is connected to the first pressure space, and a first spring is provided in the first pressure space, and both ends of the first spring are respectively fixedly connected to the piston and the shell, and a second pressure space is provided between the other end of the piston and the other end of the shell, the second water pipe is connected to the second pressure space, and a second spring is provided in the second pressure space, and both ends of the second spring are respectively fixedly connected to the piston and the shell, and the first spring and the second spring are respectively used for elastic reset of the piston in the shell.

[0011] Compared with the prior art, the hydraulically controlled check butterfly valve described in the utility model has the following beneficial effects: the pressure difference between the upstream pipeline and the downstream pipeline can be synchronously opened and interrupted through the hydraulic control component, and the opening of the valve disc can also be adjusted when the pressure difference is large, without the need for additional devices, with a simple structure, low cost, and easy installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0013] Figure 1 It is a cross-sectional schematic diagram of a hydraulically controlled non-return butterfly valve according to an embodiment of the utility model;

[0014] Figure 2 It is a cross-sectional schematic diagram of the hydraulic control assembly described in the embodiment of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the connecting plate connecting the transmission rod and the valve shaft according to an embodiment of the utility model.

[0016] Description of reference numerals:

[0017] 1-valve housing; 2-valve shaft; 3-valve disc; 4-first water pipe; 5-second water pipe; 6-support plate; 7-hydraulic control assembly; 71-housing; 72-piston; 73-first through hole; 74-second through hole; 75-support rod; 76-connecting plate; 77-transmission rod; 78-first spring; 79-second spring. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0019] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0022] like Figure 1-Figure 3 As shown, a hydraulically controlled check butterfly valve comprises a valve housing 1 and a valve shaft 2 rotatably sleeved therein, a valve disc 3 is fixedly sleeved on the periphery of the valve shaft 2, two ends of the valve housing 1 are respectively fixedly connected to an upstream pipeline and a downstream pipeline, and the valve disc 3 is used for opening and closing the upstream pipeline and the downstream pipeline, a first water pipe 4 and a second water pipe 5 are respectively arranged on the valve housing 1, and the first water pipe 4 and the second water pipe 5 are respectively located on both sides of the valve disc 3, the first water pipe 4 is connected to the upstream pipeline, the second water pipe 5 is connected to the downstream pipeline, and one end of the first water pipe 4 and one end of the second water pipe 5 are respectively connected to a hydraulic control component 7, the hydraulic control component 7 can adjust the opening of the valve disc 3 according to the pressure difference between the upstream pipeline and the downstream pipeline, when used as a check valve, the pressure difference between the upstream pipeline and the downstream pipeline can be used to synchronously open and interrupt the passage through the hydraulic control component 7, and the opening of the valve disc 3 can also be adjusted when the pressure difference is large, no additional device is required, the structure is simple, the cost is low, and the installation and maintenance are easy.

[0023] First embodiment:

[0024] The hydraulic control assembly 7 includes a shell 71, and a piston 72 is arranged in the shell 71. The piston 72 can slide axially along the shell 71. The two ends of the shell 71 are respectively provided with a first through hole 73 and a second through hole 74. The first through hole 73 is connected to the first water pipe 4, and the second through hole 74 is connected to the second water pipe 5. A support rod 75 is installed at one end of the piston 72, and a first sliding hole is provided at one end of the shell 71. The outer periphery of the support rod 75 is slidably connected to the first sliding hole. One end of the support rod 75 is connected to the valve shaft 2. The pressure difference between the upstream pipeline and the downstream pipeline can push the piston 72 to slide in the shell 71, and the sliding piston 72 can drive the valve shaft 2 to rotate through the support rod 75. Figure 3 As shown, the support rod 75 is eccentrically hinged to one end of the connecting plate 76, and the other end of the connecting plate 76 is fixedly connected to one end of the valve shaft 2. When the piston 72 pushes the support rod 75 to move axially, the support rod 75 can drive the valve shaft 2 to rotate through the connecting plate 76. The rotating valve shaft 2 can control the opening of the valve disc 3 in the valve housing 1. In the above embodiment, in order to achieve the fixation of the relative position of the shell 71, the outer periphery of the shell 71 is hinged to the outer periphery of the valve housing 1 or other fixed positions.

[0025] Second embodiment:

[0026] A driving component can be provided at the end of the piston 72 to realize the driving component to push the piston 72 and the support rod 75 to slide axially, so that the opening and closing of the valve flap 3 can be realized without the pressure difference between the upstream pipeline and the downstream pipeline, so as to adapt to different operating conditions. The specific implementation method is that a transmission rod 77 is fixedly installed at one end of the piston 72, and the support rod 75 is located at the other end of the piston 72. A second sliding hole is provided on the shell 71, and the outer periphery of the transmission rod 77 is slidably connected to the second sliding hole. One end of the transmission rod 77 is fixedly connected to the movable end of the linear actuator. The linear actuator is a push rod cylinder in the prior art. During implementation, the outer shell needs to be connected to the outer shell of the linear actuator, and then the outer periphery of the linear actuator is hinged to the outer periphery of the valve housing 1 or other fixed positions. During implementation, if the air inlet end of the push rod cylinder is not connected to the air injection equipment, but is only connected to the external atmosphere, this embodiment is equivalent to the first embodiment; if an inlet nozzle with adjustable opening is installed at the air inlet end of the push rod cylinder, then this embodiment can be used as a slow opening or slow closing valve.

[0027] Third embodiment:

[0028] A first pressure space is provided between one end of the piston 72 and one end of the housing 71, the first water pipe 4 is connected to the first pressure space, and a first spring 78 is provided in the first pressure space, and both ends of the first spring 78 are fixedly connected to the piston 72 and the housing 71, respectively. A second pressure space is provided between the other end of the piston 72 and the other end of the housing 71, the second water pipe 5 is connected to the second pressure space, and a second spring 79 is provided in the second pressure space, and both ends of the second spring 79 are fixedly connected to the piston 72 and the housing 71, respectively. The first spring 78 and the second spring 79 are respectively used for elastic reset of the piston 72 in the housing 71, as shown in FIG. Figure 2 As shown, when the periphery of the valve disc 3 is sealed and connected to the periphery of the valve housing 1, the passages between the upstream pipeline and the downstream pipeline are interrupted, the first spring 78 and the second spring 79 are both in a natural state, and the pressure difference between the upstream pipeline and the downstream pipeline is insufficient to push the piston 72. When the pressure difference between the upstream pipeline and the downstream pipeline continues to increase, the medium pressure of the upstream pipeline flows into the first pressure space from the first water pipe 4, and the medium in the second pressure space is released to the downstream pipeline through the second water pipe 5. The medium in the first pressure space pushes the piston 72 to slide circumferentially. At this time, the first spring 78 is stretched and the second spring 79 is compressed. The support rod 75 drives the valve disc 3 to rotate through the connecting plate 76, and the valve disc 3 opens. When the pressure difference between the upstream pipeline and the downstream pipeline decreases, the first spring 78 and the second spring 79 rebound respectively, pulling or pushing the piston 72 to reset, and the support rod 75 drives the valve disc 3 to rotate through the connecting plate 76, and the valve disc 3 closes.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulically controlled check butterfly valve, characterized in that: The valve comprises a valve housing (1) and a valve shaft (2) rotatably sleeved therein, a valve flap (3) being fixedly sleeved on the periphery of the valve shaft (2), two ends of the valve housing (1) being respectively fixedly connected to an upstream pipeline and a downstream pipeline, and the valve flap (3) being used for opening and closing the upstream pipeline and the downstream pipeline, a first water pipe (4) and a second water pipe (5) being respectively arranged on the valve housing (1), and the first water pipe (4) and the second water pipe (5) being respectively located on both sides of the valve flap (3), the first water pipe (4) being connected to the upstream pipeline, and the second water pipe (5) being connected to the downstream pipeline, and one end of the first water pipe (4) and one end of the second water pipe (5) being respectively connected to a hydraulic control component (7), and the hydraulic control component (7) being able to adjust the opening of the valve flap (3) by means of the pressure difference between the upstream pipeline and the downstream pipeline; The hydraulic control component (7) comprises a housing (71), and a piston (72) is arranged in the housing (71). The piston (72) can slide axially along the housing (71). The two ends of the housing (71) are respectively provided with a first through hole (73) and a second through hole (74). The first through hole (73) is connected to the first water pipe (4), and the second through hole (74) is connected to the second water pipe (5). A support rod (75) is installed at one end of the piston (72), and a first sliding hole is arranged at one end of the housing (71). The outer periphery of the support rod (75) is slidably connected to the first sliding hole. One end of the support rod (75) is connected to the valve shaft (2). The pressure difference between the upstream pipeline and the downstream pipeline can push the piston (72) to slide in the housing (71), and the sliding piston (72) can drive the valve shaft (2) to rotate through the support rod (75).

2. A hydraulically controlled check butterfly valve according to claim 1, characterized in that: The outer periphery of the housing (71) is hinged to the outer periphery of the valve casing (1) or a fixed position.

3. A hydraulically controlled check butterfly valve according to claim 1, characterized in that: One end of the valve shaft (2) is fixedly connected to one end of the connecting plate (76), and the other end of the connecting plate (76) is hinged to one end of the supporting rod (75).

4. A hydraulically controlled check butterfly valve according to claim 1, characterized in that: A transmission rod (77) is fixedly mounted on one end of the piston (72), a support rod (75) is located at the other end of the piston (72), a second sliding hole is provided on the housing (71), the periphery of the transmission rod (77) is slidably connected to the second sliding hole, one end of the transmission rod (77) is fixedly connected to the movable end of the linear actuator, and the periphery of the linear actuator is hinged to the periphery of the valve housing (1) or a fixed position.

5. The hydraulically controlled check butterfly valve according to claim 1, characterized in that: A first pressure space is provided between one end of the piston (72) and one end of the shell (71), the first water pipe (4) is connected to the first pressure space, and a first spring (78) is provided in the first pressure space, and two ends of the first spring (78) are respectively fixedly connected to the piston (72) and the shell (71), a second pressure space is provided between the other end of the piston (72) and the other end of the shell (71), the second water pipe (5) is connected to the second pressure space, and a second spring (79) is provided in the second pressure space, and two ends of the second spring (79) are respectively fixedly connected to the piston (72) and the shell (71), and the first spring (78) and the second spring (79) are respectively used for elastically resetting the piston (72) in the shell (71).

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