CN208381351U - A kind of preload locking nut for check valve valve body - Google Patents

Abstract

A kind of preload locking nut for check valve valve body, it is related to technical field of fastening, including valve body, valve nut, valve seat and rubber pad, the lower end of valve body is arranged in valve seat, valve nut is installed on the top of valve body, rubber pad is equipped between valve body and valve nut, nut is equipped on the top of valve nut, the concave face to lower recess is equipped in the middle part of the upper surface of valve nut, the lower semisection and valve nut corresponding threaded holes of valve body threaded stem section, which close, to be arranged, the step surface of valve nut lower part is set as inclined-plane, rubber pad is equipped between the upper surface of step surface and circular cone disk, the taper hole for being equipped on the bottom surface of valve nut and matching setting above circular cone disk, stepped hole is equipped between taper hole and threaded hole, the nut is arranged on the concave face above valve nut, it is equipped at the middle part of nut and matches setting with the upper semisection of threaded stem section Connecting hole；The utility model structure is simple, convenient disassembly, and does not reduce the service life of rubber pad.

Description

A kind of preload locking nut for check valve valve body

Technical field

The utility model relates to technical field of fastening, more particularly, to a kind of preload locking screw for check valve valve body It is female.

Background technique

Well known, the working principle of nut is self-locking using the frictional force progress between nuts and bolt；But heavy duty, This self-locking reliability will reduce in heavy shock loads；High-pressure diaphragm pump check valve valve body and valve nut are locking main at present It is the frictional force between leaning on the angle conical surface α self-locking and screw thread, is easy per minute by 45 to 55 jerks in equipment running process Vibration pine, reliability is very low, and a whole set of check valve and associated components is caused to scrap, and not only influences to use, leads to unplanned halt production, Increase maintenance and the maintenance frequency, considerably increases maintenance workload and labor intensity of workers, while also increasing production cost, drop Low production efficiency.Scene is welded at valve body and valve nut thread connection with mostly using greatly according to applying working condition condition, or is used Injecting glue mode is locking in toward thread connection, and often weld seam and injecting glue shatter by the way of injecting glue or welding, cause After connection screw thread loosens, and a whole set of check valve is caused to be scrapped, while both modes of use are locking, nut is no longer detachable, valve rubber The service life of glue is reduced.

Summary of the invention

In order to overcome the shortcomings in the background art, the utility model discloses a kind of preload lockings for check valve valve body Nut.

In order to realize the goal of the invention, the utility model adopts the following technical solution:

A kind of preload locking nut for check valve valve body, including valve body, valve nut, valve seat and rubber pad, valve body Lower end is arranged in valve seat, is equipped with valve nut on the top of valve body, rubber pad is equipped between valve body and valve nut, in valve spiral shell Female top is equipped with nut, and the valve body includes the valve rod of integral structure setting and the circular cone disk that is arranged in the middle part of valve rod, It is equipped at intervals with thread segment in the middle part of circular cone disk on valve rod, the light connecting with Cone Disc Middle face is equipped in the lower part of thread segment Rod segment, the upper surface of circular cone disk are set as pyramidal, and the periphery of circular cone disk is set as the chamfering shape that diameter successively reduces, valve The lower end of bar is applied in the centre bore of valve seat, and the periphery of circular cone disk is matched with the bellmouth of valve seat upper inner to be set It sets, the concave face to lower recess is equipped in the middle part of the upper surface of valve nut, it is evenly spaced on the step surface above valve nut to set There are multiple groovings, threaded hole is equipped at the center of valve nut, the lower semisection and corresponding threaded holes of threaded stem section, which close, to be arranged, valve The lower part of nut is set as step-like, and the step surface of valve nut lower part is set as inclined-plane, in the upper surface of step surface and circular cone disk Between be equipped with rubber pad, be equipped on the bottom surface of valve nut with taper hole that setting is matched above circular cone disk, in taper hole and spiral shell Stepped hole is equipped between pit, the nut is arranged on the concave face above valve nut, is equipped with and valve rod at the middle part of nut The upper semisection of thread segment matches the connecting hole of setting.

The preload locking nut for check valve valve body, the diameter of the stepped hole are greater than the diameter of threaded hole.

The preload locking nut for check valve valve body, it is circumferentially spaced on nut to be equipped with multiple peaces Fill hole.

By adopting the above-described technical solution, the utility model has the following beneficial effects:

Preload locking nut described in the utility model for check valve valve body, passes through the step surface on valve nut It is upper that the nut connecting with valve rod is set, the frictional force of pretightning force and threaded connection is increased, anti-loosing effect is effectively increased；This reality With new structure is simple, convenient disassembly, and the service life of rubber pad is not reduced.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the structural schematic diagram of the utility model valve body；

Fig. 3 is the structural schematic diagram of the utility model valve nut；

Fig. 4 is the top view of Fig. 3；

Fig. 5 is the structural schematic diagram of the utility model nut；

In figure: 1, valve body；2, nut；3, valve nut；4, rubber pad；5, valve seat；6, thread segment；7, light bar segment；8, circular cone Disk；9, threaded hole；10, stepped hole；11, taper hole；12, grooving；13, mounting hole；14, connecting hole.

Specific embodiment

By the following examples can detailed explanation the utility model, open the purpose of this utility model is intended to protect All technological improvements in the scope of the utility model.

The preload locking nut of check valve valve body, including valve body 1, valve nut 3, valve seat 5 are used in conjunction with described in attached drawing 1-5 It is arranged in valve seat 5 with the lower end of rubber pad 4, valve body 1, valve nut 3 is installed on the top of valve body 1, in valve body 1 and valve nut It is equipped with rubber pad 4 between 3, is equipped with nut 2 on the top of valve nut 3, the valve body 1 includes the valve rod of integral structure setting and sets The circular cone disk 8 in the middle part of valve rod is set, is equipped at intervals with thread segment 6 with the middle part of circular cone disk 8 on valve rod, in thread segment 6 Lower part, which is equipped with, is set as pyramidal with the light bar segment 7 that connects in the middle part of circular cone disk 8, the upper surface of circular cone disk 8, circular cone disk 8 Periphery is set as the chamfering shape that diameter successively reduces, and the lower end of valve rod is applied in the centre bore of valve seat 5, circular cone disk 8 Periphery matches setting with the bellmouth of 5 upper inner of valve seat, and the recess to lower recess is equipped in the middle part of the upper surface of valve nut 3 Face, it is evenly spaced on the step surface above valve nut 3 to be equipped with multiple groovings 12, screw thread is equipped at the center of valve nut 3 The lower semisection in hole 9, threaded stem section 6 matches setting with threaded hole 9, and the lower part of valve nut 3 is set as step-like, valve nut 3 The step surface of lower part is set as inclined-plane, rubber pad 4 is equipped between the upper surface of step surface and circular cone disk 8, at the bottom of valve nut 3 Face is equipped with the taper hole 11 for matching setting above with circular cone disk 8, and stepped hole 10 is equipped between taper hole 11 and threaded hole 9, The nut 2 is arranged on the concave face above valve nut 3, is equipped with the upper semisection phase with threaded stem section 6 at the middle part of nut 2 The connecting hole 14 being equipped with.

The diameter of the preload locking nut for check valve valve body, the stepped hole 10 is greater than the straight of threaded hole 9 Diameter.

The preload locking nut for check valve valve body, it is circumferentially spaced equipped with multiple on nut 2 Mounting hole 13.

Implement the preload locking nut described in the utility model for check valve valve body, it during installation, will be under valve body 1 Portion is mounted in valve seat 5, and the lower end of valve rod is applied in the centre bore of valve seat 5, above the periphery and valve seat 5 of circular cone disk 8 Internal bellmouth matches setting, and the threaded hole 9 at 3 center of valve nut is threadedly coupled with the lower semisection of threaded stem section 6, valve It is equipped with rubber pad 4 between the upper surface of the step surface of 3 lower part of nut and circular cone disk 8, is installed on the concave face above valve nut 3 There is nut 2, and the connecting hole 14 at 2 middle part of nut is threadedly coupled with the upper semisection of threaded stem section 6, is arranged in the upper surface of nut 2 Grooving 12 is arranged on the step surface on 3 top of valve nut, facilitates valve nut 3 convenient for connecting with extracting tool for multiple mounting holes 13 Installation and removal.

The non-detailed portion of the utility model is the prior art.

The embodiment selected herein to disclose the goal of the invention of the utility model, is presently considered to be suitable, However, it should be understood that the utility model is intended to include the institute for the embodiment that all belong within the scope of this design and utility model It changes and improves.

Claims (3)

1. a kind of preload locking nut for check valve valve body, including valve body, valve nut, valve seat and rubber pad, it is characterized in that: The lower end of valve body is arranged in valve seat, is equipped with valve nut on the top of valve body, and rubber pad is equipped between valve body and valve nut, It is equipped with nut on the top of valve nut, the valve body includes the valve rod that integral structure is arranged and the Cone Disc being arranged in the middle part of valve rod Face is equipped at intervals with thread segment in the middle part of circular cone disk on valve rod, is equipped in the lower part of thread segment and connects with Cone Disc Middle face The light bar segment connect, the upper surface of circular cone disk are set as pyramidal, and what the periphery of circular cone disk was set as that diameter successively reduces falls The lower end of horn shape, valve rod is applied in the centre bore of valve seat, the bellmouth phase of the periphery and valve seat upper inner of circular cone disk It is equipped with, the concave face to lower recess is equipped in the middle part of the upper surface of valve nut, be spaced on the step surface above valve nut equal Even is equipped with multiple groovings, and threaded hole is equipped at the center of valve nut, and the lower semisection and corresponding threaded holes of threaded stem section close Setting, the lower part of valve nut are set as step-like, and the step surface of valve nut lower part is set as inclined-plane, in step surface and circular cone disk The upper surface of between be equipped with rubber pad, be equipped on the bottom surface of valve nut with taper hole that setting is matched above circular cone disk, boring Stepped hole is equipped between hole and threaded hole, the nut is arranged on the concave face above valve nut, is equipped at the middle part of nut The connecting hole of setting is matched with the upper semisection of threaded stem section.

2. the preload locking nut according to claim 1 for check valve valve body, it is characterized in that: the stepped hole is straight Diameter is greater than the diameter of threaded hole.

3. the preload locking nut according to claim 1 for check valve valve body, it is characterized in that: along circle on nut Circumferential direction is equipped at intervals with multiple mounting holes.