Non-rising stem gate valve

Abstract

According to the technical scheme, the non-rising stem gate valve is characterized in that the non-rising stem gate valve comprises a valve body, a valve plate and a valve rod, and the valve rod is used for driving the valve plate to move up and down; the valve body sequentially comprises a water inlet end, an operation end and a water outlet end, and a buffering assembly is installed at the water inlet end. The buffering assembly comprises a buffering support, a limiting plate and a buffering piece, the buffering piece is installed on the side, opposite to the water outlet end, of the buffering support, multiple sets of positioning blocks are arranged on the end face of the water inlet end, and multiple sets of positioning holes are formed in the buffering support; the gate valve has the advantages that water flow in the water inlet end can be buffered by the gate valve, and accordingly the service life of the gate valve can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of valve, more specifically, it relates to a concealed stem gate valve. BACKGROUND

[0002] The concealed stem valve refers to the sealed sleeve pipe arranged between the operating handle or gear of the valve and the valve stem, so that the valve stem does not directly contact the medium during the lifting process, thereby achieving the effects of preventing the valve stem from being corroded by the medium and reducing leakage. The concealed stem gate valve is also called the concealed stem gate valve or the rotary stem gate valve, and its feature is that the valve stem is not exposed outside, but is operated by rotation or lifting to realize the opening and closing of the valve.

[0003] The existing concealed stem gate valve has the problems that when the gate valve is closed, water hammer is generated, which hits the valve plate, the service life of the valve plate is affected, and the service life of the gate valve is affected. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a concealed stem gate valve which can buffer the water flow in the water inlet end, thereby improving the service life of the gate valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a concealed stem gate valve, comprising a valve body, a valve plate and a valve stem, the valve stem is used for driving the valve plate to move up and down, the valve body comprises a water inlet end, an operating end and a water outlet end in sequence, a buffer assembly is installed at the water inlet end,

[0006] The buffer assembly comprises a buffer support, a limiting plate and a buffer piece, the buffer piece is installed on the side of the buffer support away from the water outlet end, a plurality of positioning blocks are arranged on the end face of the water inlet end, a plurality of positioning holes are arranged on the buffer support,

[0007] The limiting plate is fixedly installed on the end face of the water outlet end.

[0008] The utility model is further provided as follows: the limiting plate is arranged in a " " shape structure, a plurality of threaded holes are arranged on the limiting plate along the circumferential direction thereof, a connecting hole is arranged on the end face of the water inlet end, and the limiting plate is connected with the water inlet end through bolts.

[0009] The utility model is further provided as follows: the buffer support comprises a positioning ring, a connecting barrel and a mounting bracket, one end of the connecting barrel is connected with the positioning ring, the other end is connected with the mounting bracket, and the positioning holes are arranged in equidistant arrangement along the circumferential direction of the positioning ring.

[0010] The utility model further sets up: the buffer piece includes buffer board and buffer spring, buffer board slip connection is established on the mounting bracket, buffer spring sets up many groups, and sets up between buffer board and mounting bracket;

[0011] Buffer board and mounting bracket all are provided with many groups of buffer holes.

[0012] The utility model further sets up: the buffer board is set up to the arc structure on the side of mounting bracket.

[0013] The utility model further sets up: buffer board is provided with many groups of guide rod on the side to mounting bracket, the mounting bracket is provided with many groups of guide hole through, the guide rod is provided with limit ring on the end away from buffer board.

[0014] The utility model further sets up: limit ring is screwed on the guide rod.

[0015] Summarized above, the utility model has following beneficial effect: first buffer piece is installed on the buffer support, subsequently buffer support is installed at the water inlet end, when through positioning hole and positioning block makes both form the location, finally limit plate is fixedly installed at the end surface of water outlet end, forms the fixed of buffer support, because the end surface of limit plate is set up as the plane, makes it convenient with flange connects. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the three-dimensional structure schematic diagram of the gate valve of hidden rod;

[0017] Fig. 2 It is the separation structure schematic diagram of gate valve;

[0018] Fig. 3 It is the separation structure schematic diagram of buffer assembly.

[0019] Figure legend: 1, valve body;11, water inlet end;111, positioning block;112, connecting hole;12, operation end;13, water outlet end;2, valve plate;3, valve rod;4, buffer assembly;41, buffer support;411, positioning hole;42, limit plate;421, screw hole;43, buffer piece;431, buffer board;432, buffer spring;433, buffer hole;5, positioning ring;6, connecting barrel;7, mounting bracket;71, guide hole;8, guide rod;81, limit ring. DETAILED DESCRIPTION

[0020] The utility model is further explained in detail below in combination with the drawings and embodiments. Same parts are denoted by same reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific part.

[0021] Referring to Figs. 1 to 3 To achieve the above object, the utility model provides the following technical scheme: a gate valve of hidden rod, including valve body 1, valve plate 2 and valve rod 3, valve rod 3 is used to drive valve plate 2 to move up and down, valve body 1 includes water inlet end 11, operating end 12 and water outlet end 13 in proper order, and water inlet end 11 is installed with buffer assembly 4,

[0022] Buffer assembly 4 includes buffer support 41, limiting plate 42 and buffer piece 43, buffer piece 43 is installed on the side of buffer support 41 away from water outlet end 13, the end surface of water inlet end 11 is provided with multiple sets of positioning blocks 111, and buffer support 41 is provided with multiple sets of positioning holes 411.

[0023] Limiting plate 42 is fixedly installed at the end surface of water outlet end 13.

[0024] The design of the utility model, first buffer piece 43 is installed on buffer support 41, then buffer support 41 is installed at water inlet end 11, at this time, positioning hole 411 and positioning block 111 make the both form positioning, finally limiting plate 42 is fixedly installed at the end surface of water outlet end 13, and buffer support 41 is formed fixedly, since the end surface of limiting plate 42 is provided as a plane, it is convenient to connect with flange. And the buffer assembly 4 is convenient to disassemble, maintain and replace.

[0025] The utility model is further provided as: limiting plate 42 is provided as a " " structure, limiting plate 42 is provided with multiple sets of threaded holes 421 along its circumferential direction, the end surface of water inlet end 11 is provided with connecting hole 112, and limiting plate 42 is connected with water inlet end 11 by bolts. The design of the structure can completely wrap water inlet end 11 and buffer support 41 when limiting plate 42 is installed to water inlet end 11, so as to improve the stability of installation.

[0026] The utility model is further provided as: buffer support 41 includes positioning ring 5, connecting barrel 6 and mounting bracket 7, one end of connecting barrel 6 is connected with positioning ring 5, the other end is connected with mounting bracket 7, and positioning hole 411 is arranged at equidistance along the circumferential direction of positioning ring 5.

[0027] The end surface of the positioning ring 5 is attached to the water inlet end 11, and the inner wall of the connecting barrel 6 is attached to the water inlet end 11.

[0028] AsFig. 2 and Fig. 3 As shown in the figure, the positioning hole 411 and the positioning block 111 are provided with the same number, such as four groups.

[0029] The utility model further sets up: buffer piece 43 includes buffer board 431 and buffer spring 432, buffer board 431 slip connection is established on mounting bracket 7, buffer spring 432 is provided with multiple groups, and is set up between buffer board 431 and mounting bracket 7;

[0030] Buffer board 431 and mounting bracket 7 all are provided with multiple groups of buffer hole 433.

[0031] The design of this structure, in the process of water flow, will abut with buffer board 431, thereby forming the buffering effect.

[0032] Preferably, the buffer hole 433 on the buffer board 431 and the mounting bracket 7 is set in a staggered structure, which can provide secondary buffering for the water flow and improve the buffering effect.

[0033] The utility model further sets up: buffer board 431 is set in an arc structure on the side away from the mounting bracket 7.

[0034] The utility model further sets up: buffer board 431 is provided with multiple guide rods 8 on the side towards the mounting bracket 7, and the mounting bracket 7 is provided with multiple guide holes 71, and the end of the guide rod 8 away from the buffer board 431 is provided with a limit ring 81.

[0035] The design of this structure can move the buffer board 431 towards the mounting bracket 7 and compress the buffer spring 432 when the water flow impacts on the buffer board 431, thereby buffering the water flow and ensuring the smooth movement of the buffer board 431 under the action of the guide rod 8.

[0036] And the setting of the limit ring 81 can ensure that the buffer board 431 moves within a certain range.

[0037] The utility model further sets up: the limit ring 81 is screwed on the guide rod 8.

[0038] The design of this structure can disassemble the limit ring 81, thereby realizing the disassembly of the buffer piece 43 and the mounting bracket 7.

[0039] The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above-mentioned embodiments, and any technical scheme belonging to the idea of the utility model belongs to the protection scope of the utility model. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model can also be considered as the protection scope of the utility model.

Claims

1. A concealed stem gate valve comprising a valve body (1), a valve plate (2) and a valve stem (3), wherein the valve stem (3) is used to drive the valve plate (2) to move up and down; wherein: The valve body (1) successively includes a water inlet end (11), an operation end (12) and a water outlet end (13), and a buffer component (4) is installed at the water inlet end (11); The buffer component (4) includes a buffer bracket (41), a limiting plate (42) and a buffer member (43). The buffer member (43) is installed on one side of the buffer bracket (41) facing away from the water outlet end (13). Multiple groups of positioning blocks (111) are arranged on the end face of the water inlet end (11), and multiple groups of positioning holes (411) are arranged on the buffer bracket (41); The limiting plate (42) is fixedly installed on the end face of the water outlet end (13).

2. A concealed stem gate valve according to claim 1, characterized in that: The limiting plate (42) is arranged in a "C" - shaped structure. Multiple groups of threaded holes (421) are arranged along the circumferential direction of the limiting plate (42). A connecting hole (112) is arranged on the end face of the water inlet end (11). The limiting plate (42) is connected to the water inlet end (11) through bolts.

3. A concealed stem gate valve according to claim 1, characterized in that: The buffer bracket (41) includes a positioning ring (5), a connecting cylinder (6) and a mounting bracket (7). One end of the connecting cylinder (6) is connected to the positioning ring (5), and the other end is connected to the mounting bracket (7). The positioning holes (411) are arranged equidistantly along the circumferential direction of the positioning ring (5).

4. A concealed stem gate valve according to claim 3, characterized in that: The buffer member (43) includes a buffer plate (431) and a buffer spring (432). The buffer plate (431) is slidably connected to the mounting bracket (7). Multiple groups of buffer springs (432) are provided and arranged between the buffer plate (431) and the mounting bracket (7); Multiple groups of buffer holes (433) are arranged on both the buffer plate (431) and the mounting bracket (7).

5. A concealed stem gate valve according to claim 4, characterized in that: The side of the buffer plate (431) facing away from the mounting bracket (7) is arranged in an arc - shaped structure.

6. A concealed stem gate valve according to claim 4, characterized in that: Multiple groups of guide rods (8) are arranged on the side of the buffer plate (431) facing the mounting bracket (7). Multiple groups of guide holes (71) are penetrated through the mounting bracket (7). A limiting ring (81) is arranged at the end of the guide rod (8) away from the buffer plate (431).

7. A concealed stem gate valve according to claim 6, characterized in that: The limiting ring (81) is screwed onto the guide rod (8).

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