CN213271160U

CN213271160U - Novel differential pressure type one-way check valve and drying machine

Info

Publication number: CN213271160U
Application number: CN202021244148.7U
Authority: CN
Inventors: 李利; 张传生
Original assignee: Zhuhai Siger Medical Equipment Co ltd
Current assignee: Zhuhai Siger Medical Equipment Co ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2021-05-25
Anticipated expiration: 2030-06-29

Abstract

The utility model relates to an air purifier's technical field especially relates to a novel differential one-way check valve and desiccator, including the sleeve pipe, ball sealer and spring, the sleeve pipe sets up between emission branch pipe and emission house steward, and the sleeve pipe is for being equipped with front end open-ended hollow structure, and sheathed tube front end opening is equipped with the sealing ring, and the sleeve pipe is equipped with the through-hole that the intercommunication was discharged the house steward including the ball sealer section of sliding that is located its front end and the spring cassette that is located its rear end on the sleeve pipe, and the spring mounting is in the sleeve pipe, and the one end butt of spring is on the spring cassette, and the other end promotes ball. The technical problems that in the existing check valve, the guide pillar of a cantilever beam structure slides forwards and backwards in the guide sleeve, the guide pillar and the guide sleeve have production tolerance, or the guide pillar and the guide sleeve are matched with each other to produce tolerance for a long time, the guide pillar is easy to block in the sliding process, and the like are solved.

Description

Novel differential pressure type one-way check valve and drying machine

Technical Field

The utility model relates to an air purifier's technical field especially relates to a novel differential one-way check valve and desiccator.

Background

At present, the air purifier is widely applied and provides a clean air source with certain pressure for automobiles, industrial equipment, even dental equipment and the like. As a common form of an air purifier, the double-tower adsorption dryer realizes double-tower air inlet switching, and an exhaust pipeline of the double-tower adsorption dryer needs to be provided with a one-way check valve, so that the opening or closing of the exhaust pipeline does not influence the working air pressure inside the dryer.

Among the prior art, the one-way check valve that adopts on the blast pipe way of two tower absorption formula desiccators is plate structure, and including the valve plate piston of guide pin bushing, guide pillar front end and the spring on the guide pillar, there are a plurality of problems: the guide pillar and the guide sleeve have production tolerance or fit tolerance generated between the guide pillar and the guide sleeve after a long time, so that the guide pillar of the cantilever beam structure is easy to block in the sliding process; secondly, air guide holes are required to be formed in the guide pillars, so that the structure is complex, the processing difficulty is high, and the cost is high; thirdly, a plurality of sealing rings are required to be configured, so that the production cost is increased; in addition, the sealing ring belongs to consumptive material, needs often to be updated, and current complicated structure can increase the maintenance cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel differential one-way check valve and desiccator, convenient to use, reduce cost.

The utility model discloses a first aspect provides: the utility model provides a novel differential pressure type one-way check valve, is applied to two of two tower absorption formula desiccators and discharges in the branch pipe, two discharge the branch pipe warp differential pressure type one-way check valve with discharge house steward intercommunication, differential pressure type one-way check valve includes sleeve pipe, ball sealer and spring, the sleeve pipe set up in discharge the branch pipe with discharge between the house steward, the sleeve pipe is for being equipped with front end open-ended hollow structure, sheathed tube front end opening is equipped with the sealing ring, the sleeve pipe slides the section and is located the spring cassette of its rear end including the ball sealer that is located its front end, be equipped with the intercommunication on the sleeve pipe discharge house steward's through-hole, the spring mounting be in the sleeve pipe, the one end butt of spring in on the spring cassette, the other end will be used for sealing discharge the ball.

Preferably, a first gap is arranged between the outer diameter of the sealing ball and the inner diameter of the sliding section of the sealing ball.

The preferable technical scheme is that a surface seal is arranged between the sealing ball and the sealing ring.

Specifically, the sealing ring is a polyurethane sealing ring, and the sealing ball is a polytetrafluoroethylene sealing ball.

In addition, a second gap is formed between the outer diameter of the spring and the spring clamping seat.

The second aspect of the present invention provides: a double-tower adsorption dryer comprises the novel differential pressure type one-way check valve.

The utility model has the advantages that: firstly, the technical problem that the guide pillar is easy to clamp in the sliding process due to production tolerance between the guide pillar and the guide sleeve or fit tolerance between the guide pillar and the guide sleeve after a long time in the front-back sliding process of the guide pillar in a cantilever beam structure in the existing check valve is solved; secondly, air guide holes are omitted from being formed in the guide pillars, so that the processing difficulty is reduced, and the cost is reduced; thirdly, the number of the sealing rings is reduced, and the production cost is reduced; in addition, the simplified structure reduces maintenance costs.

Drawings

FIG. 1 is a functional diagram of an embodiment of the present invention;

FIG. 2 is a front view of an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a partial enlarged view of portion C of FIG. 3;

FIG. 5 is a cross-sectional view B-B of FIG. 2;

FIG. 6 is a front sectional view of an embodiment of the present invention;

FIG. 7 is a top view of an embodiment of the present invention;

FIG. 8 is an enlarged view of a portion D of FIG. 6;

FIG. 9 is a schematic view of an embodiment of the open end wrench for assembling and disassembling the exterior sleeve and the drying cylinder according to the present invention;

wherein the reference numerals are:

1. a valve seat; 10. a primary air intake conduit; 20. an intake ball valve; 30. a first drying cylinder; 40. a second drying cylinder; 50. a first gas outlet valve; 60. a second gas outlet valve; 70. a main gas outlet pipeline; 80. a regeneration line; 90. a regeneration valve; 110. a first discharge branch pipe; 120. a second discharge branch pipe; 130. a discharge header pipe; 140. a differential pressure one-way check valve; 201. a first intake valve position; 202. a second intake valve position; 203. a first polytetrafluoroethylene sealing ball; 204. a first polyurethane seal ring;

1401. a sleeve; 1401a, a second polytetrafluoroethylene sealing ball sliding section; 1401b, a through hole; 1401c, a spring cartridge; 1402. a second polytetrafluoroethylene sealed sphere; 1403. a spring; 1404. a second polyurethane sealing ring;

1501. an outward rotating sleeve; 1502. an annular boss; 1503. a first annular flange; 1504. a second annular flange; 1506. the spanner is raised; 1507. an annular seal ring;

1600. an open end wrench.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Detailed Description

As shown in fig. 1 to 9, a dryer including a novel air inlet ball valve includes a main air inlet pipeline 10, an air inlet ball valve 20, a first drying cylinder 30, a second drying cylinder 40, a first air outlet valve 50, a second air outlet valve 60, and a main air outlet pipeline 70.

The main gas outlet pipeline 70 is provided with a regeneration pipeline 80 communicated with the first drying cylinder 30 and the second drying cylinder 40, and the regeneration pipeline 80 is provided with a regeneration valve 90.

The first drying cylinder 30 and the second drying cylinder 40 are respectively communicated with the main air outlet pipeline 70 through the switching of the first air outlet valve 50 and the second air outlet valve 60.

The main air inlet pipeline 10 is respectively communicated with the first drying cylinder 30 and the second drying cylinder 40 through the switching of the air inlet ball valve 20; the air inlet ball valve 20 comprises a first air inlet valve position 201 communicated with the first drying cylinder 30, a second air inlet valve position 202 communicated with the second drying cylinder 40, and a first polytetrafluoroethylene sealing ball 203 between the first air inlet valve position 201 and the second air inlet valve position 202, wherein both the first air inlet valve position 201 and the second air inlet valve position 202 are provided with a first polyurethane sealing ring 204, and the first polytetrafluoroethylene sealing ball 203 presses the first polyurethane sealing ring 204 on one valve position to form a surface seal in the process of switching valve positions, so that the situations of high manufacturing precision and difficult practical application required by the existing line seal between a hard sealing ball and a hard sealing ring are eliminated, and the phenomenon of gas normal discharge caused by low precision of the line seal is also eliminated; in addition, still solved present soft sealing ball and easily adsorbed and block in the trachea and lose the problem of the switching function of valve.

The regeneration pipeline 80 is respectively communicated with the first drying cylinder 30 and the second drying cylinder 40, a first discharge branch pipe 110 for discharging the regeneration gas is arranged at the bottom of the first drying cylinder 30, a second discharge branch pipe 120 for discharging the regeneration gas is arranged at the bottom of the second drying cylinder 40, a differential pressure type one-way check valve 140 is respectively arranged on the first discharge branch pipe 110 and the second discharge branch pipe 120, and the two discharge branch pipes are communicated with a discharge header pipe 130 through the differential pressure type one-way check valve 140; the differential pressure one-way check valve 140 includes a sleeve 1401, a second ptfe ball 1402 and a spring 1403, the bushing 1401 is disposed between the discharge branch pipes and the discharge manifold 130, the sleeve 1401 is a hollow structure provided with an opening at the front end, the opening at the front end of the sleeve 1401 is provided with a second polyurethane sealing ring 1404, the sleeve 1401 includes a second teflon ball sliding section 1401a at its front end and a spring clamp 1401c at its rear end, the sleeve 1401 is provided with a through hole 1401b communicating with the discharge manifold 130, the spring 1403 is installed in the sleeve 1401, one end of the spring 1403 is abutted against the spring clamp 1401c, the other end of the spring pushes a second polytetrafluoroethylene sealing ball 1402 for sealing the discharge branch to the second polyurethane sealing ring 1404, and the second polyurethane sealing ring 1404 is pressed to form a surface seal. The first drying cylinder 30 and the second drying cylinder 40 are provided with adsorbents, one of the drying cylinders works, the adsorbents adsorb moisture in the compressed air, then clean compressed gas is output to the gas outlet valve, and a part of gas is led out from the clean air of the working drying cylinder through the regeneration pipeline 80 and is used for regeneration of the adsorbents in the other drying cylinder, so that the adsorbents are revived and can be reused. During regeneration, the dry gas sucks water from the adsorbent, passes through the differential pressure one-way check valve 140 through the discharge branch pipe, overcomes the elastic force of the spring 1403, pushes the second ptfe ball 1402 open, the second ptfe ball 1402 retreats along the second ptfe ball sliding section 1401a, and the exhaust gas passes through the discharge branch pipe, the front end opening of the sleeve 1401, the second urethane sealing ring 1404 and the through hole 1401b, and is discharged from the discharge manifold 130. The spring 1403 is provided with an initial elastic force, which plays a pressure maintaining role in the discharge branch pipe and the inside of the drying cylinder, facilitating establishment of the internal and external pressure difference.

The invention realizes that: 1. the gas is prevented from being exhausted frequently due to the failure of the valve, and the working stability of the dryer is greatly improved; 2. the polytetrafluoroethylene sealing ball with hard texture and the polyurethane sealing ring with soft texture are matched to form surface sealing, so that the situations of high manufacturing precision and difficult practical application required by the line sealing between the existing hard sealing ball and the hard sealing ring are eliminated, and the phenomenon of frequent gas discharge caused by low precision of the line sealing is also eliminated; in addition, the problem that the switching function of the valve is lost due to the fact that the existing soft sealing ball is easily adsorbed and clamped in an air pipe is solved; 3. because the pressure difference can be established, the problems of frequent discharge and dryer failure are solved, the application range of the dryer can be expanded to other important fields, for example, the dryer breaks through the limit of safety bottleneck in the dental medical industry with higher safety requirement, and the like, and the use of the dryer makes a major breakthrough; 4. the technical problem that the guide pillar is easy to clamp in the sliding process due to production tolerance between the guide pillar and the guide sleeve or fit tolerance between the guide pillar and the guide sleeve after a long time in the front-back sliding process of the guide pillar in the cantilever beam structure in the check valve is solved; the air guide holes are omitted from the guide pillars, so that the processing difficulty and the cost are reduced; the configuration number of the sealing rings is reduced, and the production cost is reduced; in addition, the simplified structure reduces maintenance cost; 5. the technical problems that a belt wrench is needed and a professional person of the belt wrench can operate the drying cylinder due to high sealing requirement of the drying cylinder are solved, and the use of the drying machine is popularized; the drying cylinder with a new screw thread is convenient to replace, and the problem of poor sealing performance of the screw connection between the new screw thread and the old screw thread is solved.

As shown in fig. 4, a first gap is provided between the outer diameter D1 of the second ptfe ball seal 1402 and the inner diameter D1 of the second ptfe ball sliding section 1401a, so that the second ptfe ball seal 1402 can slide smoothly in the second ptfe ball sliding section 1401a, and the second ptfe ball seal 1402 must be aligned with the second polyurethane sealing ring 1404 to function as a face seal. An example of the outer diameter D1 of the second ptfe ball 1402 is 13 mm in D1, an example of the inner diameter D1 of the second ptfe ball skid section 1401a is 14 mm in D1, and a first gap (D1-D1)/2 is 0.5 mm in this example.

As shown in fig. 4, a second gap is provided between the outer diameter D2 of the spring 1403 and the inner diameter D2 of the spring socket 1401c, so that the spring 1403 can be strengthened to perform positioning and guiding functions.

As shown in fig. 6-9, the drying machine further includes a valve seat 1 and two external-rotation sleeves 1501, two annular bosses 1502 are arranged on the valve seat 1, the two annular bosses 1502 are arranged axially upward, external threads are arranged on the outer walls of the annular bosses 1502, the opening parts of the two drying cylinders are downwards installed in the annular bosses 1502, a first annular flange 1503 is arranged on the outer wall of the drying cylinder above the annular bosses 1502, and the external-rotation sleeves 1501 are provided with a second annular flange 1504 used for pressing the first annular flange 1503 downwards and internal threads used for screwing on the outer walls of the annular bosses 1502; a plurality of wrench protrusions 1506 matched with the open end wrench 1600 for disassembling and assembling the drying cylinder are arranged outside the external rotation sleeve 1501. The function is as follows: firstly, the problem that the popularization and the use of the dryer are hindered due to the fact that a belt wrench is needed and a professional capable of operating the belt wrench is needed because the sealing requirement is high is solved; secondly, the technical problem that if a new drying cylinder is replaced and the old thread connection between new and old threads is carried out on the basis that the drying cylinder belongs to a consumable product, the sealing performance of the drying cylinder is affected is solved.

As shown in fig. 6-8, an annular sealing ring 1507 is disposed between the first annular flange 1503 and the annular boss 1502 to enhance the sealing between the drying cylinder and the annular boss 1502.

As shown in fig. 7 and 9, the wrench protrusion 1506 is cylindrical, and correspondingly, the recessed portion of the open-end wrench 1600 for tightening the external rotation sleeve 1501 is cylindrical; the wrench protrusion 1506 is prismatic, and correspondingly, the concave part of the open wrench 1600 for tightening the external rotation sleeve 1501 is prismatic.

The inner cavity of the annular boss 1502 on the valve seat 1 is provided with an air inlet and an air outlet (not shown) of the drying cylinder, namely an air inlet for air inlet drying and an exhaust branch pipe for exhaust gas during adsorbent regeneration.

A pressure difference establishing method of a dryer comprising a novel air inlet ball valve is characterized in that the air inlet ball valve 20 forms a surface seal by pressing the first polytetrafluoroethylene sealing ball 203 on the first polyurethane sealing ring 204 on one valve position in the process of switching the valve positions; the two discharge branch pipes pass through the differential pressure type one-way check valve 140, and the second polyurethane sealing ring 1404 is extruded by the second polytetrafluoroethylene sealing ball 1402 to form a surface seal, so that the situations of high manufacturing precision and difficult practical application required by the existing line seal between the hard sealing ball and the hard sealing ring are eliminated, and the phenomenon of frequent gas discharge caused by low precision of the line seal is also eliminated; in addition, still solved present soft sealing ball and easily adsorbed and block in the trachea and lose the problem of the switching function of valve.

The above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and all equivalent changes made by the shape, structure and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A novel differential pressure type one-way check valve is applied to two discharge branch pipes of a double-tower adsorption dryer, the two discharge branch pipes are communicated with a discharge main pipe through the differential pressure type one-way check valve, it is characterized in that the differential pressure type one-way check valve comprises a sleeve, a sealing ball and a spring, the sleeve is arranged between the discharge branch pipe and the discharge main pipe, the sleeve is a hollow structure with an opening at the front end, the opening part at the front end of the sleeve is provided with a sealing ring, the sleeve comprises a sealing ball sliding section at the front end of the sleeve and a spring clamping seat at the rear end of the sleeve, the sleeve is provided with a through hole communicated with the discharge main pipe, the spring is arranged in the sleeve, one end of the spring is abutted against the spring clamping seat, and the other end of the spring pushes a sealing ball used for sealing the discharge branch pipe and abuts against the sealing ring.

2. The new differential pressure one-way check valve as claimed in claim 1 wherein a first clearance is provided between the outer diameter of the sealing ball and the inner diameter of the sliding section of the sealing ball.

3. The new differential pressure one-way check valve of claim 1 wherein the sealing ball and the sealing ring form a face seal therebetween.

4. The new differential pressure one-way check valve of claim 3, wherein said sealing ring is a polyurethane sealing ring and said sealing ball is a polytetrafluoroethylene sealing ball.

5. The new differential pressure one-way check valve of claim 1, wherein a second clearance is provided between the outer diameter of the spring and the spring seat.

6. A dryer comprising the novel differential pressure one-way check valve of any one of claims 1-5.