High-performance flat gate valve

Abstract

The utility model discloses a high-performance flat gate valve which comprises a valve body, and a valve element assembly is arranged in the valve body. The valve element assembly comprises a gate plate, the gate plate is slidably connected with the valve body, a valve rod is arranged above the gate plate, the lower end of the valve rod is fixedly connected with a threaded rod, the gate plate is in threaded connection with the threaded rod, the lower end of the valve body communicates with a sewage discharging bin, and a transverse frame is fixedly connected into the sewage discharging bin. Symmetrically-arranged connecting shells are fixedly connected to the transverse frame, wedge-shaped blocks are slidably connected into the connecting shells, and an annular shell is slidably connected into the valve body. According to the gate valve, the valve element assembly is arranged, when the gate plate blocks the valve, the gate plate is used for driving the connecting shell to move, then the sealing ring is driven to further clamp the gate plate, the sealing effect and the anti-pressure capacity of the gate valve can be effectively improved, and even if the gate plate moves slightly, sealing of the whole gate valve cannot be affected; the utility model is suitable for the use condition of gas pipelines.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline valve technical field especially relates to high performance flat gate valve. BACKGROUND

[0002] Flat gate valve is widely used in petroleum, natural gas, chemical industry and other fields, needs to have high sealing property, high pressure resistance, corrosion resistance, long life and other characteristics.

[0003] In prior art, the gate valve works through the perpendicularity of the movement direction of the valve core and the fluid direction to realize the open-close control operation of the fluid passage, is applied in gas delivery, in the environment of larger gas pressure, the valve core is easy to deform after pressure bearing, causes the leakage of the gate valve, especially the liquefied gas can also appear water hammer effect when the valve is closed, so that the gate valve needs higher pressure resistance, for this, we propose high performance flat gate valve to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model discloses a high performance flat gate valve to solve the problems in the prior art.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] High performance flat gate valve, including the valve body, be provided with the valve core subassembly in the valve body,

[0007] The valve core subassembly includes the gate, the gate is slidably connected with the valve body, the upper of the gate is provided with the valve rod, and the lower end of the valve rod is fixedly connected with the threaded rod, the gate is threadedly connected with the threaded rod, the lower end of the valve body is communicated with the blowdown bin, the blowdown bin is fixedly connected with the crosspiece, the crosspiece is fixedly connected with the symmetrically arranged connecting shell, the connecting shell is slidably connected with the wedge block in it, the valve body is slidably connected with the annular shell, and the annular shell is slidably connected with the sealing ring in it, the sealing ring is provided with the support frame, and the annular shell is communicated with the connecting shell.

[0008] Preferably, the valve body includes a main body, a valve cover is fixedly connected to the main body, and a gland is fixedly connected to the valve body, the upper end of the valve rod is fixedly connected with the driving handle, the blowdown bin is fixedly connected to the lower end of the main body, a sink is further formed in the main body, and the annular shell is arranged in the sink.

[0009] Preferably, symmetrically arranged diffusion pipes are further communicated with the main body, and a diffusion valve is arranged on the diffusion pipe.

[0010] Preferably, symmetrically arranged support tables are fixedly connected to the inner wall of the main body, and the gate is arranged between the two support tables.

[0011] Preferably, the sewage outlet is arranged on one side of the sewage bin, and a plug is arranged in the sewage outlet.

[0012] Preferably, the lower end of the gate plate is fixedly connected with a conical head for driving the wedge-shaped block to move.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The utility model discloses a valve core assembly is arranged, when the gate plate is closed, the gate plate drives the connecting shell to move, and then the sealing ring further clamps the gate plate, which can effectively improve the sealing effect and pressure resistance of the gate valve.

[0015] 2. The utility model discloses a supporting table is arranged, can better clamp the gate plate and fix, reduces the stress of the valve rod, avoids the displacement of the gate plate, and to a certain extent, blocks the medium in the pipeline from leaking upwards, and through the sewage outlet and the plug, the user can clean the stains in the sewage bin under the condition that the valve is closed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a sectional structure schematic view of the high-performance flat gate valve.

[0017] Fig. 2 It is a partial structure schematic view of the high-performance flat gate valve.

[0018] Fig. 3 It is a sealing ring structure schematic view of the high-performance flat gate valve.

[0019] In the drawing: 1, valve body;101, main body;102, valve cover;103, gland;104, driving handle;2, gate plate;3, valve rod;4, threaded rod;5, sewage bin;6, cross frame;7, connecting shell;8, wedge-shaped block;9, annular shell;10, sealing ring;11, supporting frame;12, diffuser pipe;13, diffuser valve;14, supporting table;15, plug;16, conical head. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0021] Referring to Figs. 1-3 , the high-performance flat gate valve comprises a valve body 1, and a valve core assembly is arranged in the valve body 1.

[0022] The valve core assembly includes a gate plate 2, which is slidably connected to the valve body 1. A valve stem 3 is provided above the gate plate 2, and a threaded rod 4 is fixedly connected to the lower end of the valve stem 3. The gate plate 2 and the threaded rod 4 are threadedly connected. The lower end of the valve body 1 is connected to a drain chamber 5. A cross frame 6 is fixedly connected inside the drain chamber 5. A symmetrically arranged connecting shell 7 is fixedly connected to the cross frame 6. A wedge block 8 is slidably connected inside the connecting shell 7. An annular shell 9 is slidably connected inside the valve body 1, and a sealing ring 10 is slidably connected inside the annular shell 9. A support frame 11 is provided inside the sealing ring 10. The annular shell 9 and the connecting shell 7 are connected. A pressure transmission medium, such as hydraulic oil, is provided inside the annular shell 9 and the connecting shell 7.

[0023] In this design, when the user closes the gate valve, after rotating the threaded rod 4, the engagement of the thread with the gate 2 causes the valve stem 3 and the gate 2 to move downwards. The lower end of the gate 2 inserts into the drain chamber, causing it to abut against the wedge block 8. The wedge block 8 slides towards the connecting shell 7 under the action of the gate 2, thereby driving the sealing ring 10 towards the gate 2 through the pressure transmission medium. Ultimately, the sealing ring 10 abuts against the gate 2. In this state, the sealing ring 10 can be tightly pressed against the gate 2, providing a more secure seal. To ensure effective sealing and provide some support for the gate 2, the support frame 11 located inside the sealing ring 10 also supports the middle part of the gate 2, dispersing the pressure on the gate 2 and preventing deformation of the middle part of the gate 2 due to stress. Even if the gate 2 is impacted by changes in pipeline pressure or water hammer effect, when the gate 2 vibrates, the gate 2 will drive the wedge block 8 to continue sliding towards the connecting shell 7, making the sealing ring 10 and the gate 2 more tightly abut against each other, thus preventing gas leakage.

[0024] Furthermore, the valve body 1 includes a main body 101, a valve cover 102 is fixedly connected to the main body 101, and a pressure cap 103 is fixedly connected to the valve body 1. A drive handle 104 is fixedly connected to the upper end of the valve stem 3. The sewage discharge chamber is fixedly connected to the lower end of the main body 101. A settling groove is also provided inside the main body 101, and the annular shell 9 is located inside the settling groove.

[0025] In this design, the valve body 1 is similar to the gate valve structure in the prior art. The conventional configuration of the packing and sealing gaskets follows the sealing requirements of the prior art, which will not be elaborated on here. In addition, the settling groove is located close to the gate plate 2, and the annular shell 9 is also covered with a sealing gasket to ensure that the gas does not pass through the gap between the annular shell 9 and the valve body 1.

[0026] Furthermore, the main body 101 is also connected to symmetrically arranged vent pipes 12, and vent pipes 12 are provided with vent valves 13;

[0027] The diffusion pipe 12 and the diffusion valve 13 are devices specially used for discharging air or gas in the pipeline, the air in the pipeline is discharged by the diffusion pipe 12 when the pipeline is put into operation, and the gas in the pipeline can be discharged by the diffusion pipe 12 when the pipeline or equipment is overhauled, so as to prevent the formation of explosive mixed gas in the pipeline, and a flame arrester is further arranged on the diffusion pipe 12.

[0028] Further, the inner wall of the main body 101 is fixedly connected with symmetrically arranged support tables 14, and the gate plate 2 is arranged between the two support tables 14, the support tables 14 can better clamp and fix the gate plate 2, reduce the stress of the valve rod 3 and the threaded rod 4, and avoid displacement of the gate plate 2 along the direction of gas flow after rotation of the screw rod 4 or under pressure, and to a certain extent, block the upward leakage of the gas in the pipeline.

[0029] Further, one side of the blowdown chamber 5 is provided with a blowdown opening, and the blowdown opening is provided with a plug 15, in this design, the blowdown opening can facilitate the user to clean the stains in the blowdown chamber 5, the blowdown opening should be plugged with the plug 15 under normal circumstances, and the valve should be in a closed state when cleaning to avoid gas leakage.

[0030] Further, the lower end of the gate plate 2 is fixedly connected with a conical head 16 for driving the wedge-shaped block 8 to move, the conical head 16 can ensure the cooperation effect of the gate plate 2 and the wedge-shaped block.

[0031] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. High performance flat gate valve comprising a valve body (1), characterized in that, A valve core assembly is provided inside the valve body (1); The valve core assembly includes a gate (2), which is slidably connected to the valve body (1). A valve stem (3) is provided above the gate (2), and a threaded rod (4) is fixedly connected to the lower end of the valve stem (3). The gate (2) and the threaded rod (4) are threadedly connected. A sewage discharge chamber (5) is connected to the lower end of the valve body (1). A cross frame (6) is fixedly connected inside the sewage discharge chamber (5). A symmetrically arranged connecting shell (7) is fixedly connected to the cross frame (6). A wedge block (8) is slidably connected inside the connecting shell (7). An annular shell (9) is slidably connected inside the valve body (1), and a sealing ring (10) is slidably connected inside the annular shell (9). A support frame (11) is provided inside the sealing ring (10). The annular shell (9) and the connecting shell (7) are connected.

2. The high performance flat gate valve of claim 1, wherein, The valve body (1) includes a main body (101), a valve cover (102) is fixedly connected to the main body (101), and a pressure cap (103) is fixedly connected to the valve body (1). A drive handle (104) is fixedly connected to the upper end of the valve stem (3). The sewage discharge chamber is fixedly connected to the lower end of the main body (101). A settling groove is also provided inside the main body (101), and the annular shell (9) is located inside the settling groove.

3. The high performance flat gate valve of claim 2, wherein, The main body (101) is also connected to symmetrically arranged vent pipes (12), and vent pipes (12) are provided with vent valves (13).

4. The high performance flat gate valve of claim 2, wherein, The inner wall of the main body (101) is fixedly connected with symmetrically arranged support platforms (14), and the gate (2) is located between the two support platforms (14).

5. The high performance flat gate valve of claim 1, wherein, The sewage discharge chamber (5) has a sewage discharge port on one side, and a plug (15) is installed inside the sewage discharge port.

6. The high performance flat gate valve of claim 1, wherein, The lower end of the gate (2) is fixedly connected to a conical head (16) for moving the wedge block (8).

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