Pressing plate mounting structure of ball valve

Abstract

The utility model discloses a pressing plate mounting structure of a ball valve, a mounting position and a connecting part are arranged on a valve body, and a pressing plate is provided with first connecting holes located at the front end and the rear end and a first limiting bumping post located at the rear position of the first connecting hole at the front end; the connecting part is provided with a second connecting hole corresponding to the first connecting hole and a second limiting blocking column corresponding to the limiting blocking column, and the second limiting blocking column is provided with an open groove matched with the first limiting blocking column. When the pressing plate is mounted, the pressing plate penetrates into the mounting position from one end, in the transverse penetrating direction, of the mounting position, the first limiting blocking column abuts against the second limiting blocking column, the first limiting blocking column is embedded into the open groove, the pressing plate is positioned, then the threaded fasteners are mounted in the first connecting hole and the second connecting hole which are opposite, and assembling is more convenient. When the pressing plate is affected by torsion, part of stress can be decomposed through cooperation of the first limiting blocking column and the second limiting blocking column, the influence of the torsion on the threaded fastener is reduced, and the threaded fastener is not prone to loosening.

Description

Technical Field

[0001] The utility model relates to the field of ball valves, in particular to a pressure plate installation structure of a ball valve. Background Art

[0002] Ball valve is one of the most widely used valves. It has a simple structure, reliable sealing and convenient maintenance. It is widely used in the fields of petroleum, chemical industry, metallurgy, textile, food, atomic energy, aviation, etc. The plug body is a spherical valve core, which is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. The plug body needs to be rotated by the valve stem to open or cut off the pipeline.

[0003] The ball valve usually includes a valve body, a valve core, a valve stem structure and a valve cover, wherein the valve core is arranged in the valve cavity of the valve body and is linked to the valve stem structure. The sealing performance between the valve stem structure and the valve body directly affects the service life of the ball valve. In the existing valve stem structure, the sealing effect is achieved by compressing the packing and the sealing ring. The packing is compressed by the pressure plate, and the pressure plate is connected and fixed to the valve body. The patent number is CN201621309258.0, and the utility model patent named a ball valve with good sealing effect squeezes the packing into the column hole of the valve stem structure and the valve body through the beef brisket pressure plate structure, and the beef brisket pressure plate structure is connected and fixed to the connecting part on the valve body by bolts. When installing the beef brisket pressure plate, the connecting hole on the connecting part needs to be aligned with the connecting hole on the beef brisket pressure plate before installing the bolts. In addition, since the rotation of the valve stem during use will generate a torque that causes the beef brisket pressure plate to twist, the torque is applied to the bolt, and the bolt will loosen after long-term use. Utility Model Content

[0004] The main purpose of the utility model is to provide a pressure plate installation structure of a ball valve, aiming to realize the positioning installation of the pressure plate, and the bolts are not easy to loosen.

[0005] The utility model provides a pressing plate mounting structure for a ball valve, which is used to connect and fix the pressing plate to the valve body, so that the pressing plate presses the sealing packing in the valve body. An installation position for the transverse penetration and installation of the pressing plate is provided on the valve body, and connecting parts are arranged on both sides of the outer wall of the valve body along the transverse penetration direction of the installation position for connecting the pressing plate; the pressing plate is provided with first connection holes at the front and rear ends and a first limiting stop column at a position behind the first connection hole at the front end; the connecting part is provided with second connection holes corresponding to the first connection holes and second limiting stop columns corresponding to the limiting stop columns, and an opening groove adapted to the first limiting stop column is arranged on the second limiting stop column; the pressing plate penetrates into the installation position from one end in the transverse penetration direction of the installation position, the pressing ring at the lower end of the pressing plate presses on the upper end of the sealing packing, and the first limiting stop column is embedded into the opening groove and abuts against the second limiting stop column to limit the position of the pressing plate, so that the first connection hole is opposite to the second connection hole, and a threaded fastener is installed in the opposite first connection hole and second connection hole to connect and fix the pressing plate on the valve body.

[0006] Preferably, the valve body is provided with upward extending support parts on opposite sides of the installation position, and the opposite sides of the pressing plate are provided with hook parts corresponding to the support parts, and the hook parts are laterally hooked on the support parts.

[0007] Preferably, bolts are installed in the opposite first connection hole and second connection hole, and the bolts are connected and locked with nuts.

[0008] Preferably, a screw head groove adapted to the head of the bolt is arranged on the back of the connecting part, and the screw head groove and the head of the bolt are regular polygons that match each other.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0010] The utility model is provided with an installation position on the valve body for the transverse penetration and installation of the pressing plate, and connecting parts arranged on both sides of the outer wall of the valve body along the transverse penetration direction of the installation position for connecting the pressing plate; the pressing plate is provided with first connection holes at the front and rear ends and a first limit stop column at a position behind the first connection hole at the front end; the connecting part is provided with second connection holes corresponding to the first connection holes and second limit stop columns corresponding to the limit stop columns, and an opening groove adapted to the first limit stop column is arranged on the second limit stop column. When installing the pressing plate, the pressing plate penetrates into the installation position from one end of the transverse penetration direction of the installation position. When installed in place, the first limit stop column abuts against the second limit stop column, the pressing ring at the lower end of the pressing plate presses on the upper end of the sealing packing, and the first connection hole is opposite to the second connection hole. The first limit stop column is embedded in the opening groove, so that the position of the first limit stop column in front of it and on the left and right sides is restricted, thereby positioning the pressing plate. Then, threaded fasteners are installed in the opposite first connection hole and second connection hole to connect and fix the pressing plate on the valve body, making the assembly more convenient.

[0011] When the pressing plate is affected by torsion, the cooperation between the first limit stop column and the second limit stop column can decompose part of the force, reduce the influence of torsion on the threaded fastener, and make the threaded fastener not easy to loosen. Description of the Drawings

[0012] Figure 1 It is an exploded view of the pressing plate installation structure in the embodiment of the utility model.

[0013] Figure 2 It is a structural diagram of the pressing plate installed on the valve body in the embodiment of the utility model.

[0014] Figure 3 It is a structural diagram of the valve body in the embodiment of the utility model.

[0015] The realization, functional features and advantages of the purpose of the utility model will be further described in conjunction with the embodiments with reference to the drawings. Detailed Embodiment

[0016] The embodiments of the utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and should not be construed as a limitation of the utility model.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and above-mentioned drawings of this application are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification, claims or above-mentioned drawings of this application are used to distinguish different objects and not to describe a specific order.

[0018] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] Referring to Figures 1 to 3 , an embodiment of the present utility model provides a pressing plate mounting structure for a ball valve, which is used to connect and fix the pressing plate 4 to the valve body, so that the pressure ring at the lower end of the pressing plate 4 presses the sealing packing in the valve body. The valve body is provided with a mounting position 1 for the horizontal penetration and installation of the pressing plate 4 and connecting portions 2 arranged on both sides of the outer wall of the valve body along the horizontal penetration direction of the mounting position 1, and the connecting portions 2 are used to connect the pressing plate 4. The pressing plate 4 is provided with a through hole for the valve stem 7 to penetrate. The pressing plate 4 is provided with first connecting holes 41 at the front and rear ends and first limiting stoppers 43 at positions behind the first connecting holes 41 at the front end. The connecting portions 2 are provided with second connecting holes 21 corresponding to the first connecting holes 41 and second limiting stoppers 23 corresponding to the limiting stoppers 43, and the second limiting stoppers 23 are provided with opening grooves 24 adapted to the first limiting stoppers 43. The valve body is provided with upwardly extending support portions 3 on opposite sides of the mounting position 1, and the opposite sides of the pressing plate 4 are provided with hook portions 42 corresponding to the support portions 3.

[0020] When installing the pressing plate 4, the pressing plate 4 is inserted into the installation position 1 from one end in the lateral penetration direction of the installation position 1. When installed in place, the first limit post 43 abuts against the second limit post 23, the hook portion 42 is hooked on the supporting portion 3, the pressing ring at the lower end of the pressing plate 4 is located on the sealing filler, and the first connection hole 41 is opposite to the second connection hole 21. The first limit post 43 is embedded in the opening groove 24, so that the position of the first limit post 43 in front of it and on its left and right sides is restricted; the hook portion 42 is laterally matched with the supporting portion 3, so that the positions on both sides of the pressing plate 4 are restricted; thus, the pressing plate 4 is positioned. The pressing plate 4 is positioned during installation through structural settings, and then bolts 5 are installed in the opposite first connection hole 41 and second connection hole 21. The bolts 5 are connected and locked with nuts 6, so that the pressing plate 4 is connected and fixed to the valve body, making the assembly more convenient.

[0021] When the pressing plate 4 is affected by torque, the cooperation between the first limit post 43 and the second limit post 34 and the cooperation between the supporting portion 3 and the hook portion 42 can decompose part of the force, reduce the influence of torque on the bolts 5 and nuts 6, and make the bolts 5 and nuts 6 not easy to loosen.

[0022] On the back of the connecting portion 2, there is a screw head groove 22 adapted to the head 51 of the bolt 5. The screw head groove 22 and the head 51 of the bolt are regular polygons that match each other, so that the head 51 of the bolt is positioned in the screw head groove 22 and the bolt 5 cannot rotate.

[0023] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions or other adjustments to the features in the embodiments of the present invention according to the situation without making creative efforts, so as to obtain different technical solutions that essentially do not deviate from the concept of the present invention, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A pressing plate mounting structure for a ball valve, which is used to connect and fix a pressing plate to a valve body, so that the pressing plate presses a sealing filler in the valve body, and is characterized in that The valve body is provided with an installation position for the transverse penetration and installation of the pressing plate, and connection parts arranged on both sides of the outer wall of the valve body along the transverse penetration direction of the installation position for connecting the pressing plate; the pressing plate is provided with first connection holes at the front and rear ends and a first limit stop column at a position behind the first connection hole at the front end; the connection part is provided with second connection holes corresponding to the first connection holes and second limit stop columns corresponding to the limit stop columns, and an opening groove adapted to the first limit stop column is arranged on the second limit stop column; the pressing plate penetrates into the installation position from one end of the transverse penetration direction of the installation position, a pressing ring at the lower end of the pressing plate presses on the upper end of the sealing packing, the first limit stop column is embedded into the opening groove and abuts against the second limit stop column to limit the position of the pressing plate, so that the first connection hole is opposite to the second connection hole, and a threaded fastener is installed in the opposite first connection hole and second connection hole to connect and fix the pressing plate on the valve body.

2. The pressing plate mounting structure of the ball valve according to claim 1, characterized in that, The valve body is provided with upward extending support parts on opposite sides of the installation position, and hook parts corresponding to the support parts are arranged on opposite sides of the pressing plate, and the hook parts are laterally hooked on the support parts.

3. The pressing plate mounting structure of the ball valve according to claim 1 or 2, characterized in that, Install bolts in the opposite first connection hole and second connection hole, and the bolts are connected and locked with nuts.

4. The pressing plate mounting structure of the ball valve according to claim 3, characterized in that, A screw head groove adapted to the head of the bolt is arranged on the back of the connection part, and the screw head groove and the head of the bolt are regular polygons that match each other.

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