Marine cast steel gate valve

Abstract

The utility model discloses a marine cast steel gate valve which comprises a gate valve body, the bottom end of the gate valve body is fixedly connected with a T-shaped pipe, the left end of the T-shaped pipe is fixedly connected with a concentric-square-shaped pipe, the other side of the concentric-square-shaped pipe is fixedly connected with a connecting pipe, and two filtering pieces are installed on the concentric-square-shaped pipe. And the bottom of the concentric-square-shaped pipe is fixedly connected with two blow-down valves. According to the utility model, the filtering piece sends out an electric signal to an external control end to prompt cleaning, at the moment, the first electromagnetic valve and the second electromagnetic valve of the other flow channel are firstly opened, then the first electromagnetic valve and the second electromagnetic valve of the current flow channel are closed, and the backflow piece communicated with the current flow channel is opened; at the moment, the water flow filtered by the backflow piece reversely flows to the filtering piece in the current closed flow channel for back flushing, and a blow-down valve at the bottom is opened to realize back flushing, so that the device has the advantages that the valve body is protected, the filtering structure can be self-cleaned, and normal operation of equipment is ensured while cleaning is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of steel gate valves, in particular to a marine cast steel gate valve. Background Art

[0002] A valve is a control component in a fluid delivery system, which has the functions of shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems come in a wide variety of varieties and specifications, from the simplest shutoff valve to the various valves used in extremely complex automatic control systems. Valves 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. Valves are also divided into cast steel valves according to their materials.

[0003] Among them, cast iron valves for ships need to be used in rivers. Due to the large amount of mud and debris in the river water, long-term use can easily cause wear on the valve core inside the cast steel gate valve, block the valve body, and even cause the valve body to fail. At present, a filter structure is generally added at the inlet of the valve body, but the filter structure needs to be cleaned regularly, and the valve body needs to be stopped during operation, which is very inconvenient to operate. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a marine cast steel gate valve to solve the background technical problems.

[0005] To achieve the above purpose, the utility model adopts the following technical solution.

[0006] A marine cast steel gate valve comprises a gate valve body, wherein the bottom end of the gate valve body is fixedly connected to a T-shaped tube, the left end of the T-shaped tube is fixedly connected to a return tube, the other side of the return tube is fixedly connected to a connecting tube, two filters are installed on the return tube, two drain valves are fixedly connected to the bottom of the return tube, two first solenoid valves and a second solenoid valve are fixedly installed on the return tube, the first solenoid valve and the second solenoid valve are respectively located on the left and right sides of the drain valve, the filter is located between the first solenoid valve and the second solenoid valve and on the right side of the drain valve, two return flow pieces are installed on the outer side of the right end of the T-shaped tube, and the other ends of the two return flow pieces are respectively connected to the two flow channels of the return tube.

[0007] As a further description of the above technical solution: the filter element includes a filter screen, a plurality of pressure springs, a pressure sensing ring and a mounting shell, the outer side of the filter screen plate is slidably connected to the interior of the mounting shell, the outer side of the filter screen is slidably installed to the interior of the mounting shell, the mounting shell is fixedly installed on the circular tube, one side of the filter screen plate is fixedly connected to the pressure spring, the other end of the pressure spring is fixedly connected to the pressure sensing ring, and the other side of the pressure sensing ring is fixedly connected to the mounting shell.

[0008] As a further description of the above technical solution: the reflux component includes a reflux pipe and a control valve, one end of the reflux pipe is fixedly connected to the outer side of the right end of the T-shaped pipe, the other end of the reflux pipe is plugged and fixed to one of the flow channels of the return pipe, and the control valve is fixedly installed on the reflux pipe.

[0009] As a further description of the above technical solution: the front view cross section of the mounting shell is a polygonal rhombus, and the two sides of the mounting shell are tapered.

[0010] As a further description of the above technical solution: the meandering tube is rectangular in a top view, and the first solenoid valve and the second solenoid valve are symmetrically distributed on two long sides of the rectangle.

[0011] As a further description of the above technical solution: a control handle plate is rotatably installed on the top of the gate valve body.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] This solution uses a return pipe in conjunction with two filter elements and a first solenoid valve and a second solenoid valve in conjunction with a reflux element, thereby achieving the advantages of protecting the valve body and achieving self-cleaning of the filter structure, while ensuring normal operation of the equipment during cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0016] Figure 3 It is a partial front view cross-sectional structural schematic diagram of the utility model;

[0017] Figure 4 for Figure 3 Enlarged schematic diagram of the structure of part A in the middle.

[0018] Description of the numbers in the figure:

[0019] 1. Gate valve body; 2. T-shaped pipe; 3. Loop pipe; 4. Connecting pipe; 5. Filter element; 51. Filter screen; 52. Pressure spring; 53. Pressure sensing ring; 54. Mounting shell; 6. Drain valve; 7. First solenoid valve; 8. Second solenoid valve; 9. Reflux element; 91. Reflux pipe; 92. Control valve; 10. Control handle. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] See also Figures 1 to 4 In the utility model, a marine cast steel gate valve comprises a gate valve body 1, a T-shaped tube 2 is fixedly connected to the bottom end of the gate valve body 1, a return tube 3 is fixedly connected to the left end of the T-shaped tube 2, a connecting tube 4 is fixedly connected to the other side of the return tube 3, two filters 5 are installed on the return tube 3, two drain valves 6 are fixedly connected to the bottom of the return tube 3, two first solenoid valves 7 and second solenoid valves 8 are fixedly installed on the return tube 3, the first solenoid valve 7 and the second solenoid valve 8 are respectively located on the left and right sides of the drain valve 6, the filter 5 is located between the first solenoid valve 7 and the second solenoid valve 8 and on the right side of the drain valve 6, two reflux components 9 are installed on the outer side of the right end of the T-shaped tube 2, and the other ends of the two reflux components 9 are respectively connected to the two flow channels of the return tube 3.

[0022] In the utility model, the gate valve body 1 is used as the main body of the device, and the T-shaped pipe 2 at the bottom is used to connect the external pipeline. When in use, due to the design of the return pipe 3 set at the water inlet end, at the initial stage of use, one flow channel of the return pipe 3 is closed and the other flow channel is opened to achieve normal communication, and the water flows through the filter element 5 to filter the sediment to protect the internal valve body and avoid blockage. As the sediment in the filter element 5 gradually accumulates, the water flow pressure gradually increases until it reaches the set value. At this time, the filter element 5 sends an electrical signal to the external control end to prompt cleaning. At this time, the first solenoid valve 7 and the second solenoid valve 8 of the other flow channel are opened first, and then the first solenoid valve 7 and the second solenoid valve 8 of the current flow channel are closed, and the return element 9 connected to the current flow channel is opened. At this time, the water filtered by the reflux element 9 back-flushes the filter element 5 inside the currently closed flow channel in the opposite direction, and the drain valve 6 at the bottom is opened to realize back-flushing cleaning. At the same time, the flow channel on the other side ensures the normal passage of water, thereby realizing the device having the advantages of protecting the valve body and realizing self-cleaning of the filtering structure, while ensuring the normal operation of the equipment during cleaning. This solves the problem in the prior art that due to the large amount of silt and debris in the river water, the valve core inside the cast steel gate valve is easily worn out and the valve body is blocked, and even the valve body fails due to long-term use. At present, a filtering structure is generally added at the inlet of the valve body, but the filtering structure needs to be cleaned regularly, and the valve body needs to be stopped during operation, which is very inconvenient to operate.

[0023] See also Figure 3 and Figure 4 , wherein: the filter element 5 includes a filter screen 51, a plurality of pressure springs 52, a pressure sensing ring 53 and a mounting shell 54, the outer side of the filter screen plate 51 is slidably connected to the inside of the mounting shell 54, the outer side of the filter screen 51 is slidably mounted to the inside of the mounting shell 54, the mounting shell 54 is fixedly mounted on the loop tube 3, one side of the filter screen plate 51 is fixedly connected to the pressure spring 52, the other end of the pressure spring 52 is fixedly connected to the pressure sensing ring 53, and the other side of the pressure sensing ring 53 is fixedly connected to the mounting shell 54.

[0024] In the utility model, water is filtered through the filter screen 51, and the sediment thereon gradually increases, and the water flow pressure increases, pushing the filter screen 51 to move to the left along the inside of the mounting shell 54, squeezing the pressure spring 52, and at the same time, the pressure is transmitted to the pressure sensing ring 53 through the pressure spring 52, so as to realize real-time detection of the water flow pressure. When the pressure sensing ring 53 reaches the pressure threshold, the external controller receives a signal to control the first solenoid valve 7 and the second solenoid valve 8 of the current flow channel to close, and synchronously opens the flow channel on the other side, and at the same time opens the reflux component 9 corresponding to the closed flow channel to recoil and clean it.

[0025] See also Figure 2 , wherein: the reflux component 9 includes a reflux pipe 91 and a control valve 92, one end of the reflux pipe 91 is fixedly connected to the outer side of the right end of the T-shaped pipe 2, the other end of the reflux pipe 91 is plugged and fixed to one of the flow channels of the return pipe 3, and the control valve 92 is fixedly installed on the reflux pipe 91.

[0026] In the utility model, the connection and closing of the return pipe 91 can be flexibly controlled by the control valve 92 on the return pipe 91 , so as to facilitate the backflushing cleaning of the two filter screens 51 .

[0027] See also Figure 1 and Figure 3 , wherein: the front view cross-section of the mounting shell 54 is a polygonal rhombus, and the two sides of the mounting shell 54 are tapered.

[0028] In the present invention, by making the two ends of the mounting shell 54 tapered, the filtering area is increased and the single use time is improved.

[0029] See also Figure 2 , wherein: the plan view of the meandering tube 3 is rectangular, and the first solenoid valve 7 and the second solenoid valve 8 are symmetrically distributed on the two long sides of the rectangle.

[0030] In the utility model, the first solenoid valve 7 cooperates with the second solenoid valve 8 to seal both sides of the pipeline where the installation shell 54 is located, so as to achieve efficient discharge of backwash sewage.

[0031] See also Figure 1 , wherein: a control handle plate 10 is rotatably mounted on the top of the gate valve body 1.

[0032] In the utility model, the gate valve body 1 can be conveniently controlled to open and close by controlling the handle plate 10, which is convenient for operation.

[0033] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A marine cast steel gate valve, comprising a gate valve body (1), characterized in that: The bottom end of the gate valve body (1) is fixedly connected to a T-shaped tube (2), the left end of the T-shaped tube (2) is fixedly connected to a return tube (3), the other side of the return tube (3) is fixedly connected to a connecting tube (4), two filter elements (5) are installed on the return tube (3), the bottom of the return tube (3) is fixedly connected to two sewage valves (6), the return tube (3) is fixedly installed with two first solenoid valves (7) and a second solenoid valve (8), the first solenoid valve (7) and the second solenoid valve (8) are respectively located on the left and right sides of the sewage valve (6), the filter element (5) is located between the first solenoid valve (7) and the second solenoid valve (8) and on the right side of the sewage valve (6), and two return elements (9) are installed on the outer side of the right end of the T-shaped tube (2), and the other ends of the two return elements (9) are respectively connected to the two flow channels of the return tube (3).

2. A marine cast steel gate valve according to claim 1, characterized in that: The filter element (5) comprises a filter screen (51), a plurality of pressure springs (52), a pressure sensing ring (53) and a mounting shell (54); the outer side of the filter screen (51) is slidably connected to the inside of the mounting shell (54); the outer side of the filter screen (51) is slidably mounted to the inside of the mounting shell (54); the mounting shell (54) is fixedly mounted on the circular tube (3); one side of the filter screen (51) is fixedly connected to the pressure spring (52); the other end of the pressure spring (52) is fixedly connected to the pressure sensing ring (53); and the other side of the pressure sensing ring (53) is fixedly connected to the mounting shell (54).

3. A marine cast steel gate valve according to claim 1, characterized in that: The return member (9) comprises a return pipe (91) and a control valve (92); one end of the return pipe (91) is fixedly connected to the outer side of the right end of the T-shaped pipe (2); the other end of the return pipe (91) is plugged and fixed to one of the flow channels of the return pipe (3); and the control valve (92) is fixedly mounted on the return pipe (91).

4. A marine cast steel gate valve according to claim 2, characterized in that: The front view cross section of the mounting shell (54) is in the shape of a polygonal rhombus, and two sides of the mounting shell (54) are in the shape of cones.

5. A marine cast steel gate valve according to claim 1, characterized in that: The meander tube (3) is rectangular in a top view, and the first solenoid valve (7) and the second solenoid valve (8) are symmetrically distributed on two long sides of the rectangle.

6. A marine cast steel gate valve according to claim 1, characterized in that: A control handle plate (10) is rotatably mounted on the top of the gate valve body (1).

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