CN204784711U - Sealing mechanism of non return case frame - Google Patents

Abstract

Sealing mechanism of non return case frame, last valve body including the check valve, lower valve body and core frame, the outer wall system of core frame has the external screw thread, on, bottom spool inner wall system has the internal thread, on, the valve body puts up through threaded connection with the core down, it has the discharge orifice to open in the core frame, discharge orifice middle part system has the fixed column, it has the perforation to open in the fixed column, set up the inner core in the core frame, set up the sealed pad in plane on the inner core, sealing contact is put up with the core to sealed pad the in plane, the system has the erection column on the inner core, the erection column passes to perforate connects the stainless steel cap, set up the spring between stainless steel cap and core frame, its characterized in that: core frame outer wall middle part open and have the annular, set up O type circle in the annular, have the upper seal inclined plane in the lower tip inner wall system of last valve body, the upper end inner wall system of lower valve body has the lower seal inclined plane, upper and lower sealed inclined plane encloses sealing contact with the O type.

Description

The sealing mechanism of non-return valve core frame

Technical field

The utility model relates to safety check, particularly relates to the sealing mechanism of non-return valve core frame.

Background technique

The effect of safety check is the front end being connected on pipeline, is generally applied among band pump tube, makes all to be filled with water in the pipeline after safety check, thus make the appearance that can not have air in exiting water process.Little of the daily pipe applications of field irrigation family, large to main supply channel, be industry and modal a kind of pipe fitting in life.The core frame of existing safety check and upper, lower valve body is by means of only being threaded, in joint without any sealing mechanism, therefore need before assembly first outside core frame, to brush glue by workman, by glue, joint is sealed, its shortcoming existed is: troublesome poeration, reduce manufacturing efficiency, be not suitable for producing in enormous quantities, just cannot dismantle once assemble, if one of them parts of safety check have been broken, just whole safety check to be replaced, replacement cost is high, and glue easily drips to the surface of safety check, product external surfaces is done dirty, workman is needed to be wiped clean, improve labor strength, affect manufacturing efficiency.

Summary of the invention

The purpose of this utility model is the shortcoming existed to overcome prior art, provides a kind of structure simple, good seal performance, reduces labor strength, enhance productivity, be convenient to dismounting, reduce the sealing mechanism of the non-return valve core frame of part replacement cost.

The technological scheme of the sealing mechanism of the utility model non-return valve core frame is: the upper valve body comprising safety check, lower valve body and core frame, the outer wall of core frame is shaped with outside thread, on, lower valve core inwall is shaped with internal thread, on, lower valve body and core frame are through being threaded, discharge orifice is had in core frame, fixing column is shaped with in the middle part of discharge orifice, perforation is had in fixing column, in core frame, inner core is set, inner core arranges planar sealing pad, planar sealing pad seals with core frame and contacts, inner core is shaped with erection column, erection column connects stainless steel cap through perforation, between stainless steel cap and core frame, spring is set, it is characterized in that: in the middle part of described core frame outer wall, have annular groove, O type circle is set in annular groove, be shaped with at the underpart inwall of upper valve body and seal inclined-plane, the upper end portion inwall of lower valve body is shaped with lower seal inclined-plane, on, lower seal inclined-plane seals with O type circle and contacts.

The utility model discloses a kind of sealing mechanism of non-return valve core frame, major character be in the middle part of core frame outer wall on have annular groove, O type circle is set in annular groove, play tooth place at the screw thread of upper valve body underpart inwall to be shaped with and to seal inclined-plane, the screw thread of the upper end portion inwall of lower valve body plays tooth place and is shaped with lower seal inclined-plane, like this on tightening, during lower valve body, on, lower seal inclined-plane seals with O type circle and contacts, thus on ensureing, the sealability of lower valve body and core frame threaded connection place, avoid water from this joint seepage, save the operation of cementing, reduce the labor intensity of workman, improve manufacturing efficiency, and be conducive to dismounting, when one of them parts of safety check have been broken, replacing can be split out, reduce the replacement cost of parts.

Accompanying drawing explanation

Fig. 1 is the structural representation of the sealing mechanism of the utility model non-return valve core frame;

Fig. 2 is the A place close-up schematic view of Fig. 1.

Embodiment

The utility model relates to a kind of sealing mechanism of non-return valve core frame, as shown in Fig. 1-Fig. 2, comprise the upper valve body 1 of safety check, lower valve body 2 and core frame 3, the outer wall of core frame is shaped with outside thread, on, lower valve core inwall is shaped with internal thread, on, lower valve body and core frame are through being threaded, discharge orifice 4 is had in core frame, fixing column 5 is shaped with in the middle part of discharge orifice, perforation 6 is had in fixing column, inner core 7 is set in core frame, inner core is arranged planar sealing pad 8, planar sealing pad seals with core frame 3 and contacts, inner core is shaped with erection column 9, erection column connects stainless steel cap 10 through perforation 6, spring 11 is set between stainless steel cap and core frame 3, it is characterized in that: in the middle part of described core frame 3 outer wall, have annular groove 12, O type circle 13 is set in annular groove, be shaped with at the underpart inwall of upper valve body 1 and seal inclined-plane 14, the upper end portion inwall of lower valve body 2 is shaped with lower seal inclined-plane 15, on, lower seal inclined-plane seals with O type circle 13 and contacts.Major character be in the middle part of core frame 3 outer wall on have annular groove 12, O type circle 13 is set in annular groove, play tooth place at the screw thread of upper valve body 1 underpart inwall to be shaped with and to seal inclined-plane 14, the screw thread of the upper end portion inwall of lower valve body 2 plays tooth place and is shaped with lower seal inclined-plane 15, like this on tightening, lower valve body 1, when 2, on, lower seal inclined-plane seals with O type circle 13 and contacts, thus on ensureing, the sealability of lower valve body and core frame 3 threaded connection place, avoid water from this joint seepage, save the operation of cementing, reduce the labor intensity of workman, improve manufacturing efficiency, and be conducive to dismounting, when one of them parts of safety check have been broken, replacing can be split out, reduce the replacement cost of parts.

Claims (1)

1. the sealing mechanism of non-return valve core frame, comprise the upper valve body (1) of safety check, lower valve body (2) and core frame (3), the outer wall of core frame is shaped with outside thread, on, lower valve core inwall is shaped with internal thread, on, lower valve body and core frame are through being threaded, discharge orifice (4) is had in core frame, fixing column (5) is shaped with in the middle part of discharge orifice, perforation (6) is had in fixing column, inner core (7) is set in core frame, inner core is arranged planar sealing pad (8), planar sealing pad seals with core frame (3) and contacts, inner core is shaped with erection column (9), erection column connects stainless steel cap (10) through perforation (6), spring (11) is set between stainless steel cap and core frame (3), it is characterized in that: in the middle part of described core frame (3) outer wall, have annular groove (12), O type circle (13) is set in annular groove, upper sealing inclined-plane (14) is shaped with at the underpart inwall of upper valve body (1), the upper end portion inwall of lower valve body (2) is shaped with lower seal inclined-plane (15), on, lower seal inclined-plane seals with O type circle (13) and contacts.