WO2018076155A1

WO2018076155A1 - Parallel gate valve

Info

Publication number: WO2018076155A1
Application number: PCT/CN2016/103165
Authority: WO
Inventors: 吴振宇
Original assignee: 南通龙源电站阀门有限公司
Priority date: 2016-10-25
Filing date: 2016-10-25
Publication date: 2018-05-03

Abstract

Provided is a parallel gate valve, comprising a valve body (1), a valve cover (2), a valve rod (3), a valve seat (4) and a gate assembly. The gate assembly cooperates with the valve seat to form a sealing pair, and the gate assembly comprises a gate frame (6). An inverted T-shaped groove (7) is arranged at an upper end of the gate frame, meanwhile a lower end of the valve rod is arranged with an inverted T-shaped mounting member (8), and the mounting member corresponds to the inverted T-shaped groove on the gate frame. Left and right ends of the gate frame are respectively provided with a left gate (11) and a right gate (10). A spring (9) is arranged between the left gate and the right gate. Upper ends of the left gate and the right gate are fixed on the gate frame through a connecting plate (12). A screw connection between the valve rod and the gate frame is changed into the T-shaped groove connection, and with a relative connection, the left and the right gate are fixed to the gate frame through the connecting plate, without the need of fixing and easy for installation and disassembly. Therefore, there are less demands on neutral, and the corresponding demands of machining accuracy and verticality are also reduced.

Description

Parallel gate valve

Technical field

The invention relates to a valve, in particular to a parallel gate valve with simple structure and convenient installation and disassembly.

Background technique

The gate valve is one of the most commonly used shut-off valves and is primarily used to turn the media in the line on or off, and is not used to regulate media flow. The range of pressures, temperatures and diameters used is very large, especially for medium and large diameter pipes. The opening and closing member of the gate valve is a gate, the direction of movement of the gate is perpendicular to the direction of the fluid, and the gate valve can only be fully open and fully closed. , can not be adjusted and throttled. The gate has two sealing faces. The two sealing faces of the most common mode gate valves form a wedge shape, and the wedge angle varies with valve parameters.

In the conventional gate valve, the connection between the ram and the ram frame is a matching connection between the positioning rod and the positioning sleeve, and the connection between the valve stem and the ram frame is a threaded connection. In the above structure, when installing or disassembling, it is necessary to cooperate with a plurality of people, it requires a large amount of manual labor, and a plurality of tools are required for assembly. In addition, for the gate and the shutter frame and the valve stem, The connection between the ram frames requires the use of a threaded connection, so a good alignment is required, the processing accuracy and the verticality are required, and the corresponding production cost is high.

Summary of the invention

The technical problem to be solved by the present invention is to provide a parallel shutter valve which is simple in structure and convenient to be installed and disassembled.

In order to solve the above technical problem, the technical solution of the present invention is: a parallel gate valve, the gate valve includes a valve body, and a valve cover is used at the upper end of the valve body, and the valve body has a passage through which the medium flows and a cavity in which the valve stem moves, the valve stem extends from the middle of the valve cover from the top to the bottom of the valve body, and a shutter assembly is connected to the lower end of the valve stem A valve seat mounted on the valve body is disposed at both ends of the ram assembly, and the ram assembly and the valve seat cooperate to form a sealing pair, and the innovations are as follows:

The shutter assembly includes a shutter frame having an inverted T-shaped groove at an upper end of the shutter frame, and a lower end of the valve stem has an inverted T-shaped mounting member, and the mounting member and the gate frame are inverted T-slot corresponding;

The left and right ends of the ram frame are respectively installed with a left ram and a right ram, and a spring is installed between the left ram and the right ram, and the upper ends of the left ram and the right ram are fixed by a connecting plate On the ram shelf.

Further, the connection between the left shutter and the right shutter and the connecting plate is specifically: the connecting plate includes a rectangular parallelepiped connecting plate body, and mounting protrusions are sequentially arranged from the inner side to the outer side of the connecting plate main body And the limiting protrusion, at the upper end of the ram frame, under the inverted T-shaped groove, further has a connecting plate mounting groove communicating with the inverted T-shaped groove and corresponding to the connecting plate main body, and the left sill and the right gate The upper end of the plate is provided with a positioning groove corresponding to the mounting protrusion.

An advantage of the present invention is that in the present invention, the threaded connection between the valve stem and the shutter frame is changed to a T-slot connection, and the left and right shutters are fixed to the shutter frame through the connecting plate, In the structure, the movable connection is adopted, which does not need to be fixed, and the installation and disassembly are convenient, so the neutrality requirement is not high, and the corresponding processing precision and verticality requirements are also reduced, and the production cost is saved.

DRAWINGS

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

Figure 1 is a schematic illustration of a parallel gate valve of the present invention.

2 is a schematic view of a shutter assembly in a parallel gate valve of the present invention.

Figure 3 is a schematic view of the shutter frame in the parallel gate valve of the present invention.

Figure 4 is a schematic view of the shutter in the parallel gate valve of the present invention.

Figure 5 is a schematic view of the connecting plate in the parallel gate valve of the present invention.

Figure 6 is a schematic view of the valve stem of the parallel gate valve of the present invention.

detailed description

The following examples are intended to provide a fuller understanding of the invention, and are not intended to limit the invention.

A parallel gate valve as shown in FIG. 1 includes a valve body 1, a valve cover 2, a valve stem 3, a valve seat 4, and a shutter assembly.

At the upper end of the valve body 1 there is a valve cover 2 for use therewith, in the valve body 1 there is a passage 5 for the medium to flow and a cavity for the valve stem 3 to move, the valve stem 3 is from the middle of the valve cover 2 Positioning from top to bottom into the cavity of the valve body 1, a shutter assembly is connected to the lower end of the valve stem 3, and a valve seat 4 mounted on the valve body 1 is disposed at both ends of the shutter assembly, and The sealing surface of the shutter assembly cooperates with the sealing surface of the valve seat 4 to form a sealing pair.

As shown in the schematic diagram of FIG. 2, the shutter assembly includes a shutter frame 6 having an inverted T-shaped groove 7 at the upper end of the shutter frame 6, as shown in FIG. 3, while the lower end of the valve stem 3 has a downwardly inverted shape. The T-shaped mounting member 8 is as shown in FIG. 6, and the mounting member 8 corresponds to the inverted T-shaped groove 7 on the shutter frame 6, and the size of the inverted T-shaped groove 7 can be slightly larger than that during the processing. The size of the piece 8.

A left shutter 11 and a right shutter 10 are respectively mounted on the left and right ends of the shutter frame 6, and a spring 9 is mounted between the left shutter 11 and the right shutter 10, and the upper ends of the left shutter 11 and the right shutter 10 are attached. It is fixed to the shutter frame 6 by the connecting plate 12.

As shown in the schematic diagram of FIG. 5, the connecting plate 12 includes a rectangular parallelepiped connecting plate main body 13. At the two ends of the connecting plate main body 13, a mounting protrusion 14 and a limiting protrusion 15 are sequentially arranged from the inside to the outside, and the mounting protrusion is mounted. The width of 14 is smaller than the width of the limiting projection 15, and the upper end of the shutter frame 6 is located below the inverted T-shaped groove 7 and has a connection with the inverted T-shaped groove 7 and corresponding to the connecting plate main body 13. The plate mounting groove 16 has a positioning groove 17 corresponding to the mounting protrusion 14 at the upper ends of the left shutter 11 and the right shutter 10. As shown in FIG. 4, the width of the positioning groove 17 is slightly larger than the mounting protrusion. The width of 14 is smaller than the width of the limit projection 15.

When assembling, first, the left shutter 11 and the right shutter 10 are respectively mounted on the shutter frame 6, and after the assembly is completed, the connecting plate 12 is aligned with the connecting plate mounting groove 16 on the shutter frame 6, The connecting plate 12 is embedded, and the left shutter 11 and the right shutter 10 are restrained by the mounting protrusion 14 and the limiting protrusion 15 while being embedded, thereby fixing the left shutter 11 and the right shutter 10 to the gate. On the plate frame 6, finally, the valve stem 3 is inserted into the side end of the ram frame 6, and the mounting space 8 at the bottom end of the valve stem 3 is matched with the inverted T-shaped groove 7 on the ram frame 6, and the valve stem 3 is used. The connection with the ram frame 6 is completed, and the above assembly process can be completed by one person, and the assembly can be realized without using any tools, which is very convenient.

It should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and that the present invention is only described in the foregoing description and the description of the present invention, without departing from the spirit and scope of the invention. Various changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and their equivalents.

Claims

A parallel gate valve, the gate valve includes a valve body having a valve cover for use at an upper end of the valve body, the valve body having a passage for the medium to flow and a valve stem movable a cavity, the valve stem extends from the top position of the valve cover from the top to the bottom into the cavity of the valve body, and a shutter assembly is connected at a lower end of the valve stem, and a mounting is provided at both ends of the shutter assembly. a valve seat on the valve body, and the shutter assembly and the valve seat cooperate to form a sealing pair, which is characterized by:

The shutter assembly includes a shutter frame having an inverted T-shaped groove at an upper end of the shutter frame, and a lower end of the valve stem has an inverted T-shaped mounting member, and the mounting member and the gate frame are inverted T-slot corresponding;

The left and right ends of the ram frame are respectively installed with a left ram and a right ram, and a spring is installed between the left ram and the right ram, and the upper ends of the left ram and the right ram are fixed by a connecting plate On the ram shelf.
The parallel gate valve according to claim 1, wherein the connection between the left shutter and the right shutter and the connecting plate is specifically: the connecting plate comprises a rectangular parallelepiped connecting plate body, and the connecting plate The two ends of the main body are provided with mounting protrusions and limiting protrusions from the inside to the outside. The upper end of the sash frame is located below the inverted T-shaped groove and has a connection with the inverted T-shaped groove and corresponds to the main body of the connecting plate. The connecting plate mounting groove has a positioning groove corresponding to the mounting protrusion at the upper ends of the left shutter and the right shutter.