Stop valve convenient to disassemble and assemble

Abstract

The utility model relates to a stop valve convenient to disassemble and assemble, which belongs to the field of valves, comprises a valve body, a valve clack, a valve rod and a support, and is characterized in that the lower end of the support is fixedly connected with the upper end of a middle cavity of the valve body through a clamp connecting device, the clamp connecting device is composed of an elastic clamp, a bolt and a nut, the elastic clamp is composed of two symmetrical semicircular buckles, and the bolt is connected with the nut. The two symmetrical semicircular buckles are connected in a fastening mode through the two bolts and the two nuts, the support and the valve body are connected in a fastening installation mode, and installation and disassembly are time-saving and convenient.

Description

Technical Field

[0001] The utility model belongs to the field of valves, and in particular relates to a stop valve. Background Art

[0002] The stop valve generally includes a valve body, a valve disc, a valve stem, a bracket, and a transmission mechanism. A valve seat is arranged between the inlet and outlet channels of the valve body. The lower end of the valve stem is connected to the valve disc, and the upper end is connected to the transmission mechanism fixedly installed on the bracket. The lower end of the bracket of the existing stop valve is generally fixedly installed on the upper end of the middle cavity of the valve body by a flange. When installing or disassembling, it needs to be installed or disassembled by bolts / nuts in the circumferential direction of the flange, which is troublesome and time-consuming to install and disassemble. Utility Model Content

[0003] The utility model aims at the shortcomings of the prior art and provides a stop valve which is time-saving and convenient to disassemble and assemble.

[0004] The technical solution to realize the utility model is:

[0005] A disassembly and assembly stop valve comprises a valve body, a valve disc, a valve cover and a bracket, wherein the valve disc is mounted on the lower end of a valve stem, the upper end of the valve stem is connected to a transmission mechanism, and a packing sealing device is arranged between the inner wall of a cavity in the valve body and the valve stem; the characteristic is that the lower end of the bracket is fixedly connected to the upper end of the cavity in the valve body by a clamp connection device, the clamp connection device is composed of an elastic clamp, a bolt and a nut, the elastic clamp is composed of two symmetrical semicircular clips, radial mounting lugs are arranged at both ends of the semicircular clips, a mounting hole is arranged in the middle of the radial mounting lugs, a trapezoidal groove is arranged on the inner wall of the semicircular clip, and a trapezoidal boss which cooperates with the trapezoidal groove of the semicircular clip is arranged at the connection between the valve body and the bracket; the bolt passes through the mounting holes of the two semicircular clips, and the two semicircular clips are fastened and connected by nuts.

[0006] In the above technical solution, the valve body cavity is provided with an annular step, the lower end surface of the bracket is installed on the annular table of the annular step, and the center hole at the bottom of the bracket is movably matched with the outer cylindrical surface above the annular step in the valve body cavity.

[0007] Compared with the prior art, the beneficial effect of the utility model is that the lower end of the bracket is fixedly connected to the upper end of the valve body cavity by a clamp connection device, and two symmetrical semicircular buckles are fastened and connected by two bolts and nuts to fasten and install the bracket and the valve body, which saves time and is convenient to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the utility model.

[0009] In the figure: 1 valve body, 2 valve disc, 3 elastic clamp, 4 trapezoidal boss, 5 packing sealing device, 6 bracket, 7 radial mounting lug, 8 mounting hole, 9 trapezoidal groove, 10 valve stem. DETAILED DESCRIPTION

[0010] like Figure 1 The disassembly and assembly stop valve shown in the figure comprises a valve body 1, a valve disc 2, a valve stem 10, and a bracket 6, wherein the valve disc 2 is mounted at the lower end of the valve stem 10, and a packing sealing device 5 is arranged between the inner wall of the middle cavity of the valve body 1 and the outer cylindrical surface of the valve stem 10; the characteristic is that the lower end of the bracket 6 is fixedly connected to the upper end of the middle cavity of the valve body 1 through a clamp connection device, wherein the clamp connection device is composed of an elastic clamp 3 and a bolt and a nut, wherein the elastic clamp 3 is composed of two symmetrical semicircular buckles, wherein radial mounting lugs 7 are arranged at both ends of the semicircular buckle, a mounting hole 8 is arranged in the middle of the radial mounting lug 7, a trapezoidal groove 9 is arranged on the inner cylindrical wall of the semicircular buckle, and a trapezoidal boss 4 cooperating with the trapezoidal groove 9 of the semicircular buckle is arranged at the mutual connection between the valve body 1 and the bracket 6, and the trapezoidal boss 4 is embedded In the trapezoidal groove 9; the bolt passes through the mounting holes 8 of the two semicircular buckles, and the two semicircular buckles are fastened and connected by nuts. During the fastening process, the inclined surfaces on both sides of the trapezoidal groove 9 fasten the inclined surfaces on both sides of the trapezoidal boss 4, so that the bracket 6 and the valve body 1 are fixedly fastened and connected. It is only necessary to install or remove the bolts and nuts in the mounting holes 8 at both ends of the semicircular buckles to achieve the installation or removal of the bracket 6. The installation or removal is convenient and time-saving. The medium pressure is transmitted to the bracket 6 through the packing sealing device 5, and an axial force is generated on the elastic clamp 3. The bolt is only used to fasten the connection between the two semicircular buckles and does not bear the medium pressure. Therefore, as long as the mechanical strength of the elastic clamp 3 is calculated, the force requirements of the elastic clamp 3 in this technical solution can be met.

[0011] The valve body 1 has an annular step in the middle cavity, and the lower end surface of the bracket 6 is installed on the annular table of the annular step. The center hole at the bottom of the bracket 6 is movably matched with the outer cylindrical surface above the annular step in the middle cavity of the valve body 1 to improve the installation and positioning accuracy of the bracket 6.

Claims

1. A disassembly stop valve, comprising a valve body (1), a valve flap (2), a valve stem (10), and a bracket (6), wherein the valve flap (2) is mounted on the lower end of the valve stem (10), and a packing sealing device (5) is arranged between the inner wall of the middle cavity of the valve body (1) and the outer cylindrical surface of the valve stem (10); wherein: The lower end of the bracket (6) is fixedly connected to the upper end of the middle cavity of the valve body (1) through a clamp connection device, the clamp connection device comprising an elastic clamp (3) and a bolt and a nut, the elastic clamp (3) comprising two symmetrical semicircular buckles, radial mounting lugs (7) are provided at both ends of the semicircular buckles, a mounting hole (8) is provided in the middle of the radial mounting lug (7), a trapezoidal groove (9) is provided on the inner wall of the semicircular buckle, and a trapezoidal boss (4) that cooperates with the trapezoidal groove (9) of the semicircular buckle is provided at the connection between the valve body (1) and the bracket (6); the bolt passes through the mounting holes (8) of the two semicircular buckles, and the two semicircular buckles are fastened and connected by the nut.

2. The disassembly stop valve according to claim 1 is characterized in that: The middle cavity of the valve body (1) is provided with an annular step, the lower end surface of the bracket (6) is mounted on the annular table surface of the annular step, and the center hole at the bottom of the bracket (6) is movably matched with the outer cylindrical surface above the annular step in the middle cavity of the valve body (1).

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