CN214787945U

CN214787945U - Backflow guide mechanism for working medium leaked from piston equipment

Info

Publication number: CN214787945U
Application number: CN202120290600.1U
Authority: CN
Inventors: 赵宇
Original assignee: Wuxi Yuanshu Intelligent Fluid Technology Co ltd
Current assignee: Wuxi Yuanshu Intelligent Fluid Technology Co ltd
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-11-19
Anticipated expiration: 2031-02-02

Abstract

The utility model relates to the technical field of piston equipment and discloses a backflow guide mechanism for working medium leaked by the piston equipment; this backward flow guiding mechanism of piston equipment leakage working medium includes casing, clamp bolt and piston, the sealing ring has been cup jointed to the piston outer wall, the sealing ring right-hand member is provided with preceding sealing washer, preceding sealing washer front end is provided with preceding guide ring, preceding guide ring right-hand member is provided with the clamp ring, the step face has been seted up to the casing inner chamber, the utility model discloses a set up feed liquor chamber and leak backward flow passageway, can connect and draw the liquid that leaks to the inside earial drainage hole of sealing ring along the piston periphery from the liquid medium working chamber for cylinder piston mechanism still can steady operation under the condition of slight leakage, has alleviateed the environmental pollution risk by a wide margin, and seal load is low, and the reliability is high, and longe-lived, and simple structure is reliable, can introduce the import and can not form the air suction phenomenon with the fluid working medium that leaks from piston department.

Description

Backflow guide mechanism for working medium leaked from piston equipment

Technical Field

The utility model belongs to the technical field of piston equipment, specifically be a piston equipment leaks return flow guiding mechanism of working medium.

Background

The cylinder piston mechanism is very common in application, and can introduce high-pressure fluid working medium into a working cavity between a piston and a cylinder to push the piston to move to generate mechanical energy, and can also push the piston to suck or extrude the fluid working medium into the working cavity through mechanical movement to output fluid kinetic energy outwards.

The dynamic sealing performance between the piston and the cylinder barrel is the key for reliably realizing the conversion, and simultaneously, due to various factors, working media inevitably leak to the external environment through a sealing element between the piston and the cylinder barrel, so that the environmental pollution is caused; therefore, improvements are now needed in view of the current situation.

SUMMERY OF THE UTILITY MODEL

To the above situation, for overcoming prior art's defect, the utility model provides a piston equipment leaks backward flow guiding mechanism of working medium, the effectual dynamic seal performance who has solved between piston and the cylinder is the key of reliably realizing above-mentioned conversion, simultaneously because various factors, the working medium inevitably can also leak the problem to the external environment through the sealing element between piston and the cylinder.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a piston equipment leaks backward flow guiding mechanism of working medium, includes casing, clamp bolt and piston, the sealing ring has been cup jointed to the piston outer wall, the sealing ring right-hand member is provided with preceding sealing washer, preceding sealing washer front end is provided with preceding guide ring, preceding guide ring right-hand member is provided with the clamp ring, the step face has been seted up to the casing inner chamber, the piston passes through clamp bolt fixed connection be in the casing inner chamber, the inside discharge orifice of having seted up of piston, the inside leakage return flow passageway of having seted up of casing, leakage return flow passageway with the discharge orifice is linked together, casing left end bottom fixedly connected with feed liquor pipe, feed liquor pipe outer wall is provided with the feed liquor chamber, the side is provided with the inlet respectively about the feed liquor chamber and leaks back the liquid mouth, feed liquor chamber, leak back liquid mouth and leakage return flow passageway are linked together.

Preferably, a middle sealing ring is arranged on the left side of the sealing ring, and a rear guide ring is arranged on the left side of the middle sealing ring.

Preferably, the piston with the casing junction right-hand member is provided with the O shape sealing washer that the equidistance distributes, just the piston with the casing junction left end is provided with the back sealing washer.

Preferably, the top of the left end of the shell is fixedly connected with a first outlet one-way valve, and the bottom of the first outlet one-way valve is provided with an inlet one-way valve.

Preferably, the inlet check valve is communicated with the liquid inlet pipe, and a spring is arranged on the opposite side of the first outlet check valve and the inlet check valve.

Preferably, a liquid medium working cavity is arranged on the left side of the shell and the piston connecting cavity, and the first outlet one-way valve is communicated with the liquid medium working cavity.

Compared with the prior art, the beneficial effects of the utility model are that: 1. by arranging the liquid inlet cavity and the leakage backflow channel, liquid leaked from the liquid medium working cavity to the discharge hole in the sealing ring along the periphery of the piston can be guided, so that the cylinder piston mechanism can still stably operate under the condition of slight leakage, and the risk of environmental pollution is greatly reduced;

2. the outside of the front sealing ring is normal pressure or micro negative pressure, the rest parts are static sealing, the sealing load is low, the reliability is high, the service life is long, the structure is simple and reliable, the fluid working medium leaked from the piston can be introduced into the inlet, and the air suction phenomenon can not be formed.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

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

FIG. 2 is a schematic sectional view of the present invention;

FIG. 3 is an enlarged view of the structure of part A of the present invention;

in the figure: 1. a housing; 2. a hold-down bolt; 3. a compression ring; 4. a piston; 5. a front guide ring; 6. a front seal ring; 7. an O-shaped sealing ring; 8. a seal ring; 9. a middle seal ring; 10. a rear guide ring; 11. a first outlet check valve; 12. an inlet check valve; 13. a liquid inlet; 14. a liquid inlet cavity; 15. a liquid inlet pipe; 16. a leakage liquid return port; 17. a leakage return passage; 18. a rear seal ring; 19. a vent hole; 20. a liquid medium working chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

First embodiment, as shown in fig. 1, 2 and 3, the present invention provides a backflow guiding mechanism for working medium leaked from a piston device, which comprises a housing 1, pressing bolt 2 and piston 4, sealing ring 8 has been cup jointed to 4 outer walls of piston, 8 right-hand members of sealing ring are provided with preceding sealing washer 6, 6 front ends of preceding sealing washer are provided with preceding guide ring 5, preceding guide ring 5 right-hand member is provided with clamp ring 3, the step face has been seted up to 1 inner chamber of casing, piston 4 passes through 2 fixed connection of pressing bolt at 1 inner chamber of casing, discharge orifice 19 has been seted up to 4 insides of piston, 1 inside leakage backflow passageway 17 has been seted up to casing, leakage backflow passageway 17 and discharge orifice 19 are linked together, 1 left end bottom fixedly connected with feed liquor pipe 15 of casing, 15 outer walls of feed liquor pipe are provided with feed liquor chamber 14, the side is provided with inlet 13 and leaks liquid return port 16 about the feed liquor chamber 14 respectively, feed liquor chamber 14, it is linked together to leak liquid return port 16 and leakage backflow passageway 17.

In the second embodiment, as shown in fig. 3, the left side of the sealing ring 8 is provided with an intermediate sealing ring 9, and the left side of the intermediate sealing ring 9 is provided with a rear guide ring 10.

The intermediate seal 9 and the rear guide ring 10 ensure sealing between the piston 4 and the housing 1 and guide the piston 4.

In the third embodiment, as shown in fig. 3, the right end of the joint of the piston 4 and the housing 1 is provided with the equally distributed O-ring seals 7, and the left end of the joint of the piston 4 and the housing 1 is provided with the rear seal 18.

The O-ring 7 and the rear seal 18 provide a better seal between the piston 4 and the housing 1.

In the fourth embodiment, as shown in fig. 2, a first outlet check valve 11 is fixedly connected to the top of the left end of the housing 1, and an inlet check valve 12 is disposed at the bottom of the first outlet check valve 11.

The first outlet non return valve 11 and the inlet non return valve 12 facilitate the inlet and outlet of the liquid medium.

Fifth embodiment, as shown in fig. 2, the inlet check valve 12 is communicated with the liquid inlet pipe 15, and the first outlet check valve 11 and the inlet check valve 12 are provided with springs at opposite sides thereof.

The inlet check valve 12 is communicated with the liquid inlet pipe 15 for discharging, and the opposite sides of the first outlet check valve 11 and the inlet check valve 12 are provided with springs for matching the first outlet check valve 11 and the inlet check valve 12.

Sixth embodiment, as shown in fig. 2, a liquid medium working chamber 20 is arranged on the left side of the connecting chamber of the housing 1 and the piston 4, and the first outlet check valve 11 is communicated with the liquid medium working chamber 20.

The liquid medium working cavity 20 is convenient for containing liquid medium, and the first outlet one-way valve 11 is communicated with the liquid medium working cavity 20 so as to be convenient for the liquid medium to enter.

The working principle is as follows: initially, the spaces of the liquid medium working cavity 20, the internal discharge hole 19 of the sealing ring 8, the liquid inlet cavity 14, the liquid inlet pipe 15 and the leakage backflow channel 17 are all normal pressure air; when the piston 4 moves rightwards and starts to suck working medium, the space starts to generate negative pressure, the working medium enters the space from the liquid inlet 13 and is accumulated at the bottom of the liquid inlet cavity 14, and the liquid level gradually rises along with the continuous suction of air above the liquid level; when the liquid level in the liquid inlet cavity 14 exceeds the lower end surface of the liquid inlet pipe 15 and the liquid level is not instantaneously lower than the lower end surface of the liquid inlet pipe 15 after the liquid level is sucked again, the negative pressure in the space is equal to the suction head pressure difference of the pump, and a balance state is achieved; the working medium leakage phenomenon can occur when the piston 4 moves leftwards, namely the pressure of the working cavity rises, the leaked working medium enters the liquid inlet cavity 14 from the liquid leakage return port 16, the excessive liquid instantaneously breaks the negative pressure balance state, but the liquid inlet 13 communicated with the external environment quickly discharges the same amount of liquid to the external environment until the negative pressure balance is reestablished; the working medium leaking along the periphery of the piston 4 always flows in the above-mentioned space and cannot leak to the external environment unless the front seal 6 is seriously damaged.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a return flow guiding mechanism of piston equipment leakage working medium, includes casing (1), clamp bolt (2) and piston (4), its characterized in that: the outer wall of the piston (4) is sleeved with a sealing ring (8), the right end of the sealing ring (8) is provided with a front sealing ring (6), the front end of the front sealing ring (6) is provided with a front guide ring (5), the right end of the front guide ring (5) is provided with a compression ring (3), the inner cavity of the shell (1) is provided with a step surface, the piston (4) is fixedly connected with the inner cavity of the shell (1) through the compression bolt (2), a discharge hole (19) is formed inside the piston (4), a leakage backflow channel (17) is formed inside the shell (1), the leakage backflow channel (17) is communicated with the discharge hole (19), the bottom of the left end of the shell (1) is fixedly connected with a liquid inlet pipe (15), the outer wall of the liquid inlet pipe (15) is provided with a liquid inlet cavity (14), the left side and the right side of the liquid inlet cavity (14) are respectively provided with a liquid inlet (13) and a liquid leakage backflow port (16), the liquid inlet cavity (14), the leakage liquid return port (16) and the leakage return channel (17) are communicated.

2. The mechanism of claim 1, wherein the mechanism is configured to guide a working medium to flow back from the piston device, and further comprises: the left side of the sealing ring (8) is provided with a middle sealing ring (9), and the left side of the middle sealing ring (9) is provided with a rear guide ring (10).

3. The mechanism of claim 1, wherein the mechanism is configured to guide a working medium to flow back from the piston device, and further comprises: piston (4) with casing (1) junction right-hand member is provided with O shape sealing washer (7) that the equidistance distributes, just piston (4) with casing (1) junction left end is provided with back sealing washer (18).

4. The mechanism of claim 1, wherein the mechanism is configured to guide a working medium to flow back from the piston device, and further comprises: the top of the left end of the shell (1) is fixedly connected with a first outlet one-way valve (11), and an inlet one-way valve (12) is arranged at the bottom of the first outlet one-way valve (11).

5. The mechanism of claim 4, wherein the mechanism is characterized in that: the inlet one-way valve (12) is communicated with the liquid inlet pipe (15), and a spring is arranged on the opposite side of the first outlet one-way valve (11) and the inlet one-way valve (12).

6. The mechanism of claim 5, wherein the mechanism is characterized in that: and a liquid medium working cavity (20) is arranged on the left side of the connecting cavity of the shell (1) and the piston (4), and the first outlet one-way valve (11) is communicated with the liquid medium working cavity (20).