CN112178237A

CN112178237A - Fluid direction selection device

Info

Publication number: CN112178237A
Application number: CN202010892536.4A
Authority: CN
Inventors: 钟远锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-01-05

Abstract

The invention discloses a fluid direction selection device, and belongs to the field of fluid transmission equipment. The two ends of the cylinder body are respectively provided with an input end for inputting a fluid source, the two sides of the output pipe inside the cylinder body are respectively connected with a spherical piston in a sliding way, when one input end is connected with a fluid source, the fluid enters from the corresponding input end, pushes the spherical pistons on the same side to move towards the other side until touching the other spherical piston to stop, because the input end at the other end is blocked by the two spherical pistons and the fluid can only flow into the output pipe, the fluid can still only flow into the output pipe when the fluid source is input from the other input end, thereby realizing automatic direction selection when two fluid sources are singly delivered, and when the fluid delivery is terminated, because the elastic deformation of the spring is recovered, the spherical piston is pushed to be reset to be close to the original input end, so that the two pistons recover to seal and block the left and right input ends, and the backflow leakage of fluid at the other end of the output pipe is avoided.

Description

Fluid direction selection device

Technical Field

The invention belongs to the field of fluid transmission equipment, and particularly relates to a fluid direction selection device.

Background

At present, in some liquid supply and gas supply occasions, two fluid sources are needed to provide fluid for the same equipment, generally, the two fluid sources are connected in parallel logically, only one fluid source works at any time, and when the fluid source 1 is selected, the fluid source can reversely flow back through the fluid source 2 or damage the fluid source 2; in order to prevent media from flowing backwards, in a traditional mode, a check valve is respectively arranged at outlets of two fluid sources, so that fluid can only flow in one direction and is blocked in the opposite direction, but the fluid area of an inlet of a wafer type check valve is circular, the internal flow area is annular, the flow area is greatly reduced, the flow speed is increased, fluid vibration and air whistle are caused, the cost is high due to the fact that one check valve is additionally arranged on each fluid source pipeline, and the check valve is inconvenient to detect and investigate after faults occur; to this patent no: CN201910000028.8 discloses a fluid direction selecting device, in which a piston inside a cylinder can move according to the operating flow condition of fluid from an external inlet, so as to realize automatic direction selection of fluid, and integrate the functions of two conventional check valves into one device, i.e. optimizing the pipeline design and facilitating maintenance, but there are some defects, such as: after the fluid delivery is finished, no matter the piston moves to any position, the fluid at the outlet end can flow back into the cylinder body, so that the fluid in a container connected with the outlet end leaks.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the fluid direction selection device is provided for solving the problem that the existing fluid direction selection device cannot seal the outlet end after fluid delivery is finished, so that fluid backflow in the outlet end is caused.

In order to solve the technical problems, the invention adopts the following technical scheme:

a fluid direction selection device comprises a cylinder body and an output pipe, wherein the output pipe is vertically fixed on the outer side surface of the right middle position of the cylinder body and is communicated with the inner cavity of the cylinder body; the central shaft position of the cylinder body is provided with a guide rod, the positions of the inner part of the cylinder body, which are close to the openings at the left side and the right side, are respectively and fixedly connected with fixed rods which are symmetrical along the center of the cylinder body, the left end and the right end of the guide rod are respectively and fixedly connected with the fixed rods at the corresponding side, the guide rod is positioned at the left side and the right side and is respectively and slidably connected with a spherical piston, the central axes of the two spherical pistons are provided with a spring positioning hole which occupies one half of the position and a guide through hole which is communicated with the spring positioning hole and occupies the other half of the position, the guide through hole and the spring positioning hole are penetrated by the guide rod, the guide hole is positioned at one side of the spherical piston far away from the middle direction of the two pistons, the spring positioning hole is positioned at one side of the spherical piston facing the middle direction, and the right end of the spring is abutted against the right end wall of the spring positioning hole in the spherical piston on the right side.

Preferably, the spherical piston is made of rubber.

Preferably, the spherical piston is in interference fit with the inner side wall of the cylinder.

Preferably, the spring is in clearance fit with the guide rod, and the aperture of the spring positioning hole is determined according to the thickness of the spring.

Preferably, the guide through hole is in clearance fit with the guide rod.

Preferably, the spherical piston is spaced from the delivery tube by a distance of its own diameter when in a rest condition.

Preferably, the output pipe is fixedly connected with the cylinder body in a welding mode.

Preferably, the left end of the cylinder body is provided with a left input end, and the right end of the cylinder body is provided with a right input end.

Preferably, the outward port of the output pipe is an output end.

Compared with other methods, the method has the beneficial technical effects that:

the two ends of the cylinder body are respectively provided with a left input end and a right input end for inputting fluid source, the inner cavity of the cylinder body is communicated with the inner cavity of the output tube, two sides in the cylinder body and positioned on the output tube are respectively connected with a spherical piston in a sliding way, when one input end is connected with the fluid source, fluid enters from the corresponding input end, so that the spherical piston at the corresponding position is pushed to move towards the other piston until the spherical piston is touched to stop, the fluid flows into the output tube and finally flows towards the output end, because the input end at the other end is blocked by the two spherical pistons, the fluid can not flow towards the input end, and similarly, when the fluid source is input from the other input end, the opposite input end can be blocked, and the fluid still flows towards the output tube, the automatic direction selection when the two fluid sources are, the spherical pistons are pushed to reset to be close to the original input ends, so that the two pistons restore to seal and block the left and right input ends, and the fluid backflow leakage at the other end of the output pipe is avoided.

Drawings

FIG. 1 is a schematic sectional view of the apparatus of the present invention;

FIG. 2 is an enlarged schematic view of region A in FIG. 1;

FIG. 3 is a left side view of the apparatus of the present invention of FIG. 1;

FIG. 4 is a schematic view of the device of FIG. 1 showing the left input port 101 in fluid communication;

1. a barrel; 101. a left input end; 102. a right input end; 2. an output pipe; 201. an output end; 3. a spherical piston; 301. a spring positioning hole; 302. a guide through hole; 4. a guide bar; 5. a spring; 6. and (5) fixing the rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The words "upper", "lower", "left" and "right" when used herein are merely intended to designate corresponding upper, lower, left and right directions in the drawings, and do not limit the structure thereof.

The fluid direction selection device shown in fig. 1 comprises a cylinder body 1 and an output pipe 2, wherein the output pipe 2 is vertically fixed on the outer side surface of the right middle position of the cylinder body 1, and the output pipe 2 is communicated with the inner cavity of the cylinder body 1; a guide rod 4 is arranged at the central axis of the cylinder 1, the guide rod 4 is used for providing guiding and positioning for the movement of the spherical piston 3, fixing rods 6 which are symmetrical along the center of the cylinder 1 are fixedly connected to the positions, close to the openings at the left and right sides, in the cylinder 1, the left and right ends of the guide rod 4 are fixedly connected to the fixing rods 6 at the corresponding sides, and the fixing rods 6 are used for fixing the guide rod 4 to be located at the central axis of the cylinder 1; the left side and the right side of the guide rod 4 are respectively connected with a spherical piston 3 in a sliding manner, and the spherical pistons 3 are used for blocking fluid; as shown in fig. 2, a spring positioning hole 301 occupying a half position and a guide through hole 302 communicating with the spring positioning hole and occupying the other half position are provided on the central axis of the two spherical pistons 3, the guide through hole 302 and the spring positioning hole 301 are used for the guide rod 4 to pass through, the guide hole 302 is located on one side of the spherical piston 3 away from the middle direction of the two pistons, the spring positioning hole 301 is located on one side of the spherical piston 3 facing the middle direction of the two pistons, the guide rod 4 is sleeved with a spring 5, the left end of the spring 5 abuts against the left end wall of the spring positioning hole 301 in the left spherical piston 3, and the right end of the spring 5 abuts against the right end wall of the spring positioning hole 301 in the right spherical piston 3, so that the spring 5 is always located between the two spherical pistons 3, when the fluid delivery is terminated, the spherical piston 3 which is pushed away before is pushed away to move to the initial position as shown in fig. 1 by the elastic force of the spring, until the fixed rod 6 is touched to stop, the movement of the fluid towards the input ends at two sides in the middle is blocked, and the non-return function is simultaneously realized on the left input end 101 and the right input end 102.

Wherein spherical piston 3 is made by the rubber material, and spherical piston 3 and the inside wall interference fit of barrel 1, can produce better elastic pressure with the internal surface of barrel 1 after 3 assembles like this, conveniently receive fluidic promotion to slide along guide bar 4 on the one hand, and the good laminating nature of on the other hand can play fine closed separation effect.

The spring 5 is in clearance fit with the guide rod 4, so that when the spring 5 is compressed or elastically deformed to recover to move, the friction resistance between the spring 5 and the middle guide rod 4 can be reduced, and the damage is reduced; the diameter of the spring positioning hole 301 is determined according to the thickness of the spring 5, so that the lower spring 5 can be just accommodated, a certain gap is kept between the inner side wall of the spring positioning hole 301 and the outer side surface of the spring 5, and moving friction damage is reduced.

Wherein the guide through hole 302 is in clearance fit with the guide rod 4, so as to facilitate the smooth sliding of the spherical piston 3 along the guide rod 4.

The spherical piston 3 is spaced from the output pipe 2 by a distance of a diameter of the spherical piston 3 when in a static state, as shown in fig. 4, when the spherical piston 3 is pushed by fluid input from the input end at the same side to move to the other side to touch another spherical piston 3, a space with a larger pipe diameter is reserved for the fluid to flow into the output pipe 2.

Wherein output tube 2 is through welded mode and barrel 1 fixed connection, avoids connecting not hard up emergence leakage.

The left end of the cylinder 1 is provided with a left input end 101, and the right end thereof is provided with a right input end 102 for accessing a fluid source.

The outward port of the output pipe 2 is an output end 201 for connecting an externally required supply container or device.

The specific working process of the device comprises the following steps:

as shown in fig. 1, after the fluid-free source is connected or the delivery is terminated, the two spherical pistons 3 are pushed by the elastic deformation restoring force of the spring 5 to move to the positions close to the two ends inside the cylinder 1, respectively block the input ends on the left side and the right side, and due to the blocking of the fixing rods 6 outside the two pistons, the movement of the spherical pistons 3 towards the direction of the input ends is limited, so that the fluid in the container at the other end of the intermediate output pipe 2 cannot move towards the input ends, and further the backflow leakage of the fluid is avoided; as shown in fig. 4, when the left input end 101 is connected to a fluid source, the fluid source pushes the fluid to flow into the cylinder 1 from the left input end 101 and pushes the ball piston 3 to move rightward against the elastic deformation force of the spring 5 until the ball piston 3 on the left touches the ball piston 3 on the right, and the right input end 102 is blocked, so that the fluid can only flow to the middle output tube 2 and finally flows out through the output end 201, and similarly, when the fluid source is input from the right input end 102, the fluid can only flow to the output tube 2, so that automatic direction selection is realized, and the fluid is prevented from leaking from the input end on the other end.

The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.

Claims

1. A fluid direction selection device comprises a cylinder body (1) and an output pipe (2), wherein the output pipe (2) is vertically fixed on the outer side surface of the middle position of the cylinder body (1), the output pipe (2) is communicated with the inner cavity of the cylinder body (1), the fluid direction selection device is characterized in that a guide rod (4) is arranged at the position of a central shaft of the cylinder body (1), fixing rods (6) which are symmetrical along the center of the cylinder body (1) are fixedly connected to the positions of openings at the left side and the right side in the cylinder body (1) respectively, the left end and the right end of the guide rod (4) are fixedly connected to the fixing rods (6) at the corresponding sides respectively, spherical pistons (3) are slidably connected to the left side and the right side on the guide rod (4) respectively, a spring positioning hole (301) occupying one half position and a guide through hole (302) which is communicated with the spring positioning hole and occupies the other half position are, the guide through hole (302) and the spring positioning hole (301) are used for the guide rod (4) to penetrate through, the guide hole (302) is located on the spherical piston (3) and is far away from one side of the middle direction of the two pistons, the spring positioning hole (301) is located on the spherical piston (3) and faces towards one side of the middle direction of the two pistons, the guide rod (4) is sleeved with the spring (5), the left end of the spring (5) abuts against the left end wall of the spring positioning hole (301) in the left spherical piston (3), and the right end of the spring (5) abuts against the right end wall of the spring positioning hole (301) in the spherical piston (3) on the right side.

2. A fluid direction selection device according to claim 1, wherein the spherical piston (3) is made of rubber.

3. A fluid direction selection device according to claim 1, wherein the spherical piston (3) is in interference fit with the inner side wall of the cylinder (1).

4. A fluid direction-selecting device according to claim 1, wherein the spring (5) is in clearance fit with the guide rod (4), and the diameter of the spring positioning hole (301) is determined according to the thickness of the spring (5).

5. A fluid direction selection device according to claim 1, wherein the guide through hole (302) is a clearance fit with the guide rod (4).

6. A fluid direction selection device according to claim 1, wherein the ball piston (3) is spaced from the outlet pipe (2) by a distance of its own diameter in the rest state.

7. A fluid direction-selecting device according to claim 1, wherein the outlet tube (2) is fixedly connected to the cylinder (1) by welding.

8. A fluid direction selection device according to claim 1, wherein the left end of the cylinder (1) is provided with a left input end (101) and the right end is provided with a right input end (102).

9. A fluid direction selection device according to claim 1, wherein the outlet pipe (2) is provided with an outlet end (201) at its outward end.