CN113775797A

CN113775797A - Centering type one-way valve

Info

Publication number: CN113775797A
Application number: CN202111238374.3A
Authority: CN
Inventors: 刘兵; 刘喜才; 王文浩; 王依明; 李自广; 马继增; 徐校平
Original assignee: Puyang Yuanheng Litong Petroleum Machinery Co ltd
Current assignee: Puyang Yuanheng Litong Petroleum Machinery Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2021-12-10

Abstract

The invention relates to the technical field of one-way valves, in particular to a centering type one-way valve. The valve comprises a valve sleeve, wherein a valve seat is fixed at the lower end of the valve sleeve, a lower step is processed in the lower part of the valve sleeve, an upper step is processed in the upper part of the valve sleeve, a valve body is arranged in the valve sleeve in a sliding manner, the outer edge of the lower part of the valve body is in sliding contact with the inner edge of the lower step, the outer edge of the upper part of the valve body is in sliding sealing contact with the inner edge of the upper step, the lower end of the valve body is in sealing contact with the valve seat, a standby sealing device is arranged in the lower end of the valve sleeve, and a reinforced sealing device is arranged at the upper end of the valve body; the sealing device further comprises a spare sealing device adjusting piece, the spare sealing device adjusting piece comprises a screw rod used for being in threaded connection with the threaded hole where the plug is located, and a blocking piece is fixed at the lower end of the screw rod. The anti-backflow valve is simple in structure, convenient to use and good in stability performance in the working process of the valve body, the rubber cylinder can be tightly abutted and sealed with the inner edge of the upper step in the anti-backflow working process by arranging the reinforced sealing device, and the anti-backflow effect is good.

Description

Centering type one-way valve

Technical Field

The invention relates to the technical field of one-way valves, in particular to a centering type one-way valve.

Background

At present, a common large-flow check valve mostly adopts a way of matching a steel ball valve core with a valve seat, a steel ball can move freely in a valve cavity, so that the sealing matching of the steel ball and the valve seat is not accurate during sealing, and the steel ball freely jumps in the valve cavity under the scouring of liquid or gas media, so that the valve cavity and the steel ball are impacted and abraded, and the valve cavity and the steel ball are mechanically damaged due to long-time impact and abrasion.

Disclosure of Invention

The centering type one-way valve is simple in structure, convenient to use, good in backflow prevention effect, long in service life and good in valve body stability.

In order to achieve the purpose, the invention provides the technical scheme that:

a centering one-way valve comprises a valve sleeve, a valve seat is fixed at the lower end of the valve sleeve, a lower step is processed in the lower part of the valve sleeve, an upper step is processed in the upper part of the valve sleeve, a valve body is arranged in the valve sleeve in a sliding manner, the outer edge of the lower part of the valve body is in sliding contact with the inner edge of the lower step, the outer edge of the upper part of the valve body is in sliding sealing contact with the inner edge of the upper step, the lower end of the valve body is in sealing contact with the valve seat, a plug is connected with the lower end of the valve body in a threaded manner, through grooves are formed in the front and the rear sides of the lower step, stop blocks are fixed on the left side and the right side of the valve body above the lower step, the stop blocks are in sliding contact with the inner edge of the valve sleeve and are allowed to penetrate through the through grooves, vertical fixing rods are fixed at the upper ends of the stop blocks, upper steps are provided with upper blind holes corresponding to the fixing rods, the fixing rods are inserted in the upper blind holes on one sides of the fixing rods, the fixing rods are in a sliding sealing connection with the upper blind holes of the one sides of the upper blind holes through springs, a lower blind hole is formed in the valve body above the lower step, a plurality of through holes communicated with the lower blind hole are uniformly distributed in the circumference of the valve body, a standby sealing device is arranged in the lower end of the valve sleeve, and a reinforcing sealing device is arranged at the upper end of the valve body; the sealing device further comprises a spare sealing device adjusting piece, the spare sealing device adjusting piece comprises a screw rod used for being in threaded connection with the threaded hole where the plug is located, and a blocking piece is fixed at the lower end of the screw rod.

Specifically, reserve sealing device is including fixing the interior taper sleeve on the valve body, the cover is equipped with the sheath on the interior taper sleeve, sheath and interior taper sleeve bonding fixed connection, a plurality of cracking groove have been seted up to sheath outer fringe circumference equipartition, be provided with outer taper sleeve in the valve barrel of interior taper sleeve below, the valve body lower extreme runs through outer taper sleeve, outer taper sleeve outer fringe and the sealed contact of valve barrel inner edge, circumference equipartition is provided with a plurality of adjusting screw on the disk seat in the valve body outside, adjusting screw runs through the valve body and rather than rotate the connection, be fixed with the fender ring on the adjusting screw of valve body top, be fixed with the sealing ring on the terminal surface under the fender ring, the sealing ring rotates sealed connection with the disk seat upper end, adjusting screw upper end and outer taper sleeve threaded connection, the inboard disk seat upper end of outer taper sleeve is fixed with the uide bushing, the port gathers together to its axle center direction on the uide bushing, the valve body lower extreme runs through the uide bushing.

Specifically, strengthen sealing device including fixing the packing element and running through the extrusion cover of packing element in the valve body upper end, the upper step inner edge sliding seal connection of packing element outer fringe, extrusion cover upper portion is conical expansion portion, the extrusion cover lower part is straight section of thick bamboo, the annular has been seted up to valve body upper end inner edge, extrusion cover lower part sliding seal pegs graft in the annular, extrusion cover upper portion outer fringe and packing element inner edge contact, the extrusion cover lower extreme is connected through a plurality of lower springs and stay cord with the tank bottom of annular, stay cord upper end and extrusion cover lower extreme fixed connection, the tank bottom fixed connection of stay cord lower extreme and annular, lower spring upper end tightly supports the extrusion cover lower extreme, the tank bottom of annular is tightly supported to the lower spring lower extreme down, be fixed with the hole fender in the extrusion cover of hole fender top, be provided with the closing cap that carries out the shutoff to the hole fender in the extrusion cover, the closing cap left end rotates with the extrusion cover and is connected.

Specifically, a sealing sleeve is fixed on the fixing rod and connected with the upper blind hole in a sliding and sealing mode.

Specifically, the lower end of the extrusion sleeve is fixed with a sliding sleeve, the spring and the pull rope are positioned outside the sliding sleeve, and the sliding sleeve is inserted in the lower blind hole in a sliding and sealing manner.

Compared with the prior art, the invention has the beneficial effects that:

the invention has simple structure, convenient use and good stability in the working process of the valve body, can lead the rubber cylinder and the inner edge of the upper step to be tightly abutted and sealed in the anti-backflow working process by arranging the reinforced sealing device, has good anti-backflow effect, can adjust the outer taper sleeve and lead the outer taper sleeve to be in sealing fit with the inner taper sleeve by arranging the standby sealing device after the sealing failure of the lower end of the valve body and the valve seat, continuously realizes the function of controlling the unidirectional flow of a fluid medium, can lead the valve seat and the valve body to be used for a long time and has low use cost.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention.

Fig. 2 is a sectional view taken along the line a in fig. 1.

Fig. 3 is an enlarged view of the region B in fig. 1.

Fig. 4 is an enlarged view of the region C in fig. 1.

FIG. 5 is a schematic view of the spare seal adjuster

FIG. 6 is a schematic three-dimensional view of the inner taper sleeve and the sheath.

Detailed Description

As shown in fig. 1-6, the centering type check valve comprises a valve housing 1, a valve seat 12 is fixed at the lower end of the valve housing 1, a lower step 2 is processed in the lower part of the valve housing 1, an upper step 3 is processed in the upper part of the valve housing 1, a valve body 4 is arranged in the valve housing 1 in a sliding manner, the outer edge of the lower part of the valve body 4 is in sliding contact with the inner edge of the lower step 2, the outer edge of the upper part of the valve body 4 is in sliding contact with the inner edge of the upper step 3, the lower end of the valve body 4 is in sealing contact with the valve seat 12, a plug 21 is connected with the lower end of the valve body 4 in a threaded manner, through grooves 22 are respectively formed at the front side and the rear side of the lower step 2, stoppers 7 are respectively fixed at the left side and the right side of the valve body 4 above the lower step 2, the stoppers 7 are in sliding contact with the inner edge of the valve housing 1, the stoppers 7 are allowed to penetrate through the through grooves 22, vertical fixing rods 8 are respectively fixed at the upper ends of the stoppers 7, upper step 3 are respectively provided with upper blind holes 10 corresponding to the fixing rods 8, the fixing rods are inserted into the upper blind holes 10 at one side of the one side, a sealing sleeve 9 is fixed on the fixed rod 8, the sealing sleeve 9 is connected with the upper blind hole 10 in a sliding and sealing manner, the upper end of the fixed rod 8 is connected with the hole bottom of the upper blind hole 10 through an upper spring 11, a lower blind hole 5 is formed in the valve body 4 above the lower step 2, a plurality of through holes 6 communicated with the lower blind hole 5 are uniformly distributed on the circumference of the valve body 4, a standby sealing device is arranged in the lower end of the valve sleeve 1, and a reinforcing sealing device is arranged at the upper end of the valve body 4; the sealing device further comprises a spare sealing device adjusting piece, the spare sealing device adjusting piece comprises a screw rod 31 used for being in threaded connection with the threaded hole where the plug 21 is located, and a stopper 32 is fixed at the lower end of the screw rod 31.

The spare sealing device comprises an inner taper sleeve 18 fixed on a valve body 4, a sheath 19 is sleeved on the inner taper sleeve 18, the sheath 19 is fixedly connected with the inner taper sleeve 18 in an adhesion manner, a plurality of cracking grooves 20 are uniformly distributed on the circumference of the outer edge of the sheath 19, an outer taper sleeve 17 is arranged in a valve sleeve 1 below the inner taper sleeve 18, the lower end of the valve body 4 penetrates through the outer taper sleeve 17, the outer edge of the outer taper sleeve 17 is in sealing contact with the inner edge of the valve sleeve 1, a plurality of adjusting screws 13 are uniformly distributed on the circumference of a valve seat 12 on the outer side of the valve body 4, the adjusting screws 13 penetrate through the valve body 4 and are rotatably connected with the valve body, a baffle ring 14 is fixed on the adjusting screws 13 above the valve body 4, a sealing ring 15 is fixed on the lower end face of the baffle ring 14, the sealing ring 15 is rotatably and hermetically connected with the upper end of the valve seat 12, the upper end of the adjusting screws 13 is in threaded connection with the outer taper sleeve 17, a guide sleeve 16 is fixed on the upper end of the valve seat 12 on the inner side of the outer taper sleeve 17, the upper end of the guide sleeve 16 gathers towards the axis direction, the lower end of the valve body 4 penetrates through the guide sleeve 16.

The reinforced sealing device comprises a rubber barrel 26 fixed at the upper end of the valve body 4 and a squeezing sleeve 27 penetrating through the rubber barrel 26, the inner edge of the upper step 3 at the outer edge of the rubber barrel 26 is connected in a sliding and sealing way, the upper part of the squeezing sleeve 27 is a conical expansion part, the lower part of the squeezing sleeve 27 is a straight barrel part, the inner edge of the upper end of the valve body 4 is provided with a ring groove 23, the lower part of the squeezing sleeve 27 is inserted in the ring groove 23 in a sliding and sealing way, the outer edge of the upper part of the squeezing sleeve 27 is contacted with the inner edge of the rubber barrel 26, the lower end of the squeezing sleeve 27 is connected with the tank bottom of the ring groove 23 through a plurality of lower springs 25 and pull ropes 28, the upper end of the pull ropes 28 is fixedly connected with the lower end of the squeezing sleeve 27, the upper end of the lower springs 25 tightly abuts against the tank bottom of the ring groove 23, the lower end of the squeezing sleeve 27 is fixed with a sliding sleeve 24, the lower springs 25 and the pull ropes 28 are positioned outside the sliding sleeve 24, the sliding sleeve 24 is inserted in the lower blind hole 5 in a sliding and sealing way, a hole stopper 29 is fixed in the extrusion sleeve 27, a sealing cover 30 for plugging the hole stopper 29 is arranged in the extrusion sleeve 27 above the hole stopper 29, and the left end of the sealing cover 30 is rotatably connected with the extrusion sleeve 27.

When the valve body 4 is assembled, the valve body 4 is rotated, the fixed rod 8 and the stop block 7 correspond to the through groove 22, then the valve body 4 is inserted into the valve sleeve 1, after the stop block 7 penetrates through the through groove 22 and is positioned above the lower step 2, the valve body 4 is rotated by 90 degrees, the fixed rod 8 corresponds to the upper blind hole 10 at the moment, the valve body 4 moves upwards, the fixed rod 8 is inserted into the upper blind hole 10, and then the valve seat 12 is fixedly connected with the lower end of the valve sleeve 1.

In the using process, when fluid medium flows upwards through the valve seat 12, the valve body 4 moves upwards under the pressure action of the fluid medium, the upper spring 11 is compressed, a gap is generated between the lower end of the valve body 4 and the valve seat 12, the fluid medium enters between the valve body 4 and the valve sleeve 1 after passing through the gap and the through groove 22 on the lower step 2, the fluid medium entering between the valve body 4 and the valve sleeve 1 enters into the lower blind hole 5 of the valve body 4 through the through hole 6, the fluid medium entering into the lower blind hole 5 can push the sealing cover 30 to flow upwards, in the process of flowing upwards, the fluid medium can not directly wash the sealing conical surface of the outer conical sleeve 17 under the guiding action of the guide sleeve 16, the sealing conical surface of the outer conical sleeve 17 can be effectively prevented from being worn and then losing efficacy, and under the protective action of the sheath 19, the fluid medium can not wash the sealing conical surface of the inner conical sleeve 18, the sealing conical surface of the inner taper sleeve 18 can be effectively prevented from being worn out and then losing efficacy.

In the use, after the fluid medium pressure of valve body 4 top risees, closing cap 30 blocks up hole fender 29, closing cap 30 receives the fluid medium pressure of valve body 4 top after drive extrusion cover 27 and sliding sleeve 24 and descends, lower spring 25 is compressed, can make packing element 26 expand after extrusion cover 27 upper portion descends, thereby can block up valve barrel 1, effectual backflow prevention work that carries out, after the fluid medium pressure of valve body 4 top reduces, lower spring 25 makes extrusion cover 27 and sliding sleeve 24 restore, thereby can guarantee that valve body 4 can go upward once more.

In the using process, after the sealing effect of the valve body 4 and the valve seat 12 and the sealing effect of the reinforced sealing device are reduced, the plug 21 is detached, then the screw rod 20 of the spare sealing device adjusting piece is in threaded connection with the threaded hole where the plug 21 is located, the stopper 32 is in contact with the lower end of the valve seat 12, the valve body 4 is stabilized, then the adjusting screws 13 are simultaneously rotated to enable the outer taper sleeve 17 to move upwards, the sheath 19 can be extruded in the upward process of the outer taper sleeve 17, after the sheath 19 is extruded, the sheath 19 can be cracked along the cracking groove 20 and separated from the inner taper sleeve 18, after the sheath 19 is separated from the inner taper sleeve 18, the outer taper sleeve 17 continues to move upwards until the sealing conical surfaces of the inner taper sleeve 18 and the outer taper sleeve 17 are matched, then the spare sealing device adjusting piece is detached, when the position of the outer taper sleeve 17 is adjusted, the valve body 4 can be stabilized, and the sealing adjustment of the outer taper sleeve 17 and the inner taper sleeve 18 is realized under the sealing state of the valve body 4 and the valve seat 12, in the subsequent use process, the sealing effect in the backflow preventing work can be further improved through the sealing matching of the outer taper sleeve 17 and the inner taper sleeve 18.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A centering one-way valve comprises a valve sleeve and is characterized in that a valve seat is fixed at the lower end of the valve sleeve, a lower step is processed in the lower portion of the valve sleeve, an upper step is processed in the upper portion of the valve sleeve, a valve body is arranged in the valve sleeve in a sliding mode, the outer edge of the lower portion of the valve body is in sliding contact with the inner edge of the lower step, the outer edge of the upper portion of the valve body is in sliding sealing contact with the inner edge of the upper step, the lower end of the valve body is in sealing contact with the valve seat, a plug is connected to the lower end of the valve body in a threaded mode, through grooves are formed in the front side and the rear side of the lower step, stop blocks are fixed on the left side and the right side of the valve body above the lower step, the stop blocks are in sliding contact with the inner edge of the valve sleeve and are allowed to penetrate through the through grooves, vertical fixing rods are fixed at the upper ends of the stop blocks, upper blind holes corresponding to the fixing rods are formed in the upper step, the upper blind holes in one side of the fixing rods in a sliding sealing connection mode, the upper blind holes are connected through upper springs, a lower blind hole is formed in the valve body above the lower step, a plurality of through holes communicated with the lower blind hole are uniformly distributed in the circumference of the valve body, a standby sealing device is arranged in the lower end of the valve sleeve, and a reinforcing sealing device is arranged at the upper end of the valve body; the sealing device further comprises a spare sealing device adjusting piece, the spare sealing device adjusting piece comprises a screw rod used for being in threaded connection with the threaded hole where the plug is located, and a blocking piece is fixed at the lower end of the screw rod.

2. The centering type check valve as claimed in claim 1, wherein the backup sealing means comprises an inner cone sleeve fixed on the valve body, the inner cone sleeve is sleeved with a sheath, the sheath is fixedly connected with the inner cone sleeve in an adhesive manner, a plurality of cracking grooves are uniformly formed in the circumference of the outer edge of the sheath, an outer cone sleeve is arranged in the valve sleeve below the inner cone sleeve, the lower end of the valve body penetrates through the outer cone sleeve, the outer edge of the outer cone sleeve is in sealing contact with the inner edge of the valve sleeve, a plurality of adjusting screws are uniformly arranged on the circumference of the valve seat outside the valve body, the adjusting screws penetrate through the valve body and are rotatably connected with the valve body, a retaining ring is fixed on the adjusting screws above the valve body, a sealing ring is fixed on the lower end face of the retaining ring, the sealing ring is rotatably and sealingly connected with the upper end of the valve seat, the upper end of the adjusting screws is in threaded connection with the outer cone sleeve, a guide sleeve is fixed on the upper end of the valve seat inside the outer cone sleeve, the guide sleeve is gathered towards the axial direction of the guide sleeve, and the lower end of the valve body penetrates through the guide sleeve.

3. The centering type check valve according to claim 1, wherein the reinforced sealing device comprises a rubber cylinder fixed at the upper end of the valve body and a pressing sleeve penetrating through the rubber cylinder, the rubber cylinder is connected with the rubber cylinder in a sliding and sealing manner at the upper step inner edge of the outer edge of the rubber cylinder, the upper part of the pressing sleeve is a conical expansion part, the lower part of the pressing sleeve is a straight cylinder part, the inner edge of the upper end of the valve body is provided with a circular groove, the lower part of the pressing sleeve is inserted in the circular groove in a sliding and sealing manner, the outer edge of the upper part of the pressing sleeve is in contact with the inner edge of the rubber cylinder, the lower end of the pressing sleeve is connected with the groove bottom of the circular groove through a plurality of lower springs and pulling ropes, the upper ends of the pulling ropes are fixedly connected with the lower end of the pressing sleeve, the upper ends of the lower springs are tightly abutted against the lower end of the pressing sleeve, a hole stopper is fixed in the pressing sleeve, a sealing cover for plugging the hole stopper is arranged in the pressing sleeve above the hole stopper, and the left end of the sealing cover is rotatably connected with the pressing sleeve.

4. The centering type check valve as claimed in claim 1, wherein a sealing sleeve is fixed on the fixing rod and is in sliding sealing connection with the upper blind hole.

5. The centering type check valve as claimed in claim 3, wherein a sliding sleeve is fixed at the lower end of the extrusion sleeve, the spring and the pull rope are positioned outside the sliding sleeve, and the sliding sleeve is inserted in the lower blind hole in a sliding and sealing manner.