CN214698594U

CN214698594U - Pure water hydraulic cylinder structure

Info

Publication number: CN214698594U
Application number: CN202120382729.5U
Authority: CN
Inventors: 李建勋; 黄芳; 张鹏; 苏成明; 贾北北
Original assignee: Shaanxi Tian Yuan Materials Protection Technology Co ltd
Current assignee: Shaanxi Tian Yuan Materials Protection Technology Co ltd
Priority date: 2021-02-21
Filing date: 2021-02-21
Publication date: 2021-11-12
Anticipated expiration: 2031-02-21

Abstract

The utility model provides a pure water pneumatic cylinder structure, include: the hydraulic cylinder comprises a first-stage cylinder bottom, a first-stage cylinder barrel, a second-stage cylinder bottom, a second-stage cylinder barrel, a third-stage cylinder barrel and a third-stage cylinder barrel top, wherein the first-stage cylinder bottom and the first-stage cylinder barrel are connected to form a first-stage cylinder, the second-stage cylinder bottom and the second-stage cylinder barrel are connected to form a second-stage cylinder, the third-stage cylinder bottom, the third-stage cylinder barrel and the third-stage cylinder barrel top are connected to form a third-stage cylinder, the third-stage cylinder is arranged in the second-stage cylinder, the second-stage cylinder is arranged in the first-stage cylinder, and all surfaces, in contact with hydraulic fluid, of the first-stage cylinder, the second-stage cylinder and the third-stage cylinder are provided with anticorrosive coatings. The utility model discloses innovated tertiary hydraulic cylinder body structure to make the liquid pipe have fine corrosion resisting property, the face that hydraulic pressure can contact is anticorrosive face, accomplishes anticorrosive no dead angle, just the utility model discloses simple structure is reliable, has solved the development bottleneck problem of pure water pneumatic cylinder.

Description

Pure water hydraulic cylinder structure

Technical Field

The utility model relates to a pneumatic cylinder structure particularly, relates to a pure water pneumatic cylinder structure.

Background

The hydraulic support can reduce the occurrence of mine collapse events, greatly improves the safety of coal mine operation, is widely applied to a coal mine working face, and is one of the most important devices in a comprehensive mechanized coal mining method along with the gradual propulsion of mechanical instead of manual work.

The power media used by the fully mechanized mining equipment are emulsion, the mixture of the emulsion is composed of 95% -98% of neutral water and 3% -5% of emulsified oil, and the used emulsion is completely discharged to the underground of a coal mine, so that very serious, permanent and large-area water pollution is caused, even part of water sources of the mine are seriously damaged, the pollution loss is immeasurable, and the problem of coal mines in the world is solved.

The pure water pneumatic cylinder with pure water as the medium can fine solution above-mentioned problem, however the material of pneumatic cylinder generally is 27SiMn, thereby it not only can lead to the pollution of pure water or even can lead to the pneumatic cylinder inefficacy easily to take place the corrosion in the pure water, and whole jar uses stainless steel can make the cost promotion again, has the use case of pure water pneumatic cylinder on the existing market, but on anticorrosive treatment, anticorrosive treatment is not thorough, there is not the anticorrosive coating in the face of part and water contact, the corrosion problem still exists.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solve above-mentioned problem, provide a pure water pneumatic cylinder structure, innovated tertiary hydraulic cylinder body structure to make to lead to the liquid pipe and have fine corrosion resisting property, the face that hydraulic pressure can contact is anticorrosive face, accomplishes anticorrosive no dead angle, just the utility model discloses simple structure is reliable, has solved the development bottleneck problem of pure water pneumatic cylinder.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a pure water hydraulic cylinder structure comprising: the cylinder comprises a first-stage cylinder bottom 1, a first-stage cylinder barrel 2, a second-stage cylinder bottom 3, a second-stage cylinder barrel 4, a third-stage cylinder bottom 5, a third-stage cylinder barrel 6 and a third-stage cylinder top 7, wherein the first-stage cylinder bottom 1 and the first-stage cylinder barrel 2 are connected to form a first-stage cylinder 16, the second-stage cylinder bottom 3 and the second-stage cylinder barrel 4 are connected to form a second-stage cylinder 17, the third-stage cylinder bottom 5, the third-stage cylinder barrel 6 and the third-stage cylinder top 7 are connected to form a third-stage cylinder 18, the third-stage cylinder 18 is arranged in the second-stage cylinder 17, and the second-stage cylinder 17 is arranged in the first-stage cylinder 16.

Further basis pure water pneumatic cylinder structure, wherein form first hydraulic chamber 23 between one-level cylinder end 1 and the second grade cylinder end 3, form second hydraulic chamber 24 between one-level cylinder 2 and the second grade cylinder 4, form third hydraulic chamber 25 between second grade cylinder end 3 and the tertiary cylinder end 5, form fourth hydraulic chamber 26 between second grade cylinder 4 and the tertiary cylinder 6.

Further according to pure water pneumatic cylinder structure, wherein install bottom valve 15 on the second grade cylinder end 3, first hydraulic chamber 23 and second hydraulic chamber 24 are independent each other and mutual sealing, third hydraulic chamber 25 and fourth hydraulic chamber 26 are independent each other and mutual sealing, first hydraulic chamber 23 and third hydraulic chamber 25 pass through bottom valve 15 realizes intercommunication each other and independent sealing.

Further basis pure water hydraulic cylinder structure, wherein be provided with one-level bottom direction seal structure 11 between second grade cylinder end 3 and the one-level cylinder 2, be provided with one-level oral area direction seal structure 12 between second grade cylinder 4 and the one-level cylinder 2, be provided with second grade bottom direction seal structure 13 between tertiary cylinder end 5 and the second grade cylinder 4, be provided with second grade oral area direction seal structure 14 between tertiary cylinder 6 and the second grade cylinder 4, through one-level bottom direction seal structure 11 realizes first hydraulic chamber 23 and second hydraulic chamber 24 are independent each other and mutual seal, through second grade bottom direction seal structure 13 realizes third hydraulic chamber 25 and fourth hydraulic chamber 26 are independent each other and mutual seal.

Further basis pure water hydraulic cylinder structure, wherein one-level bottom direction seal structure 11, one-level oral area direction seal structure 12, second grade bottom direction seal structure 13 and second grade oral area direction seal structure 14 all include sealed structure and sealed elastic component, sealed structure is the stainless steel structure, sealed elastic component is corrosion-resistant elastic component.

Further according to pure water pneumatic cylinder structure, wherein first hydraulic chamber 23 communicates in first liquid pipe 8, second hydraulic chamber 24 communicates in second liquid pipe 9, fourth hydraulic chamber 26 communicates in third liquid pipe 10.

Further basis pure water pneumatic cylinder structure, wherein first liquid lead-through pipe 8 passes the lateral wall through-hole of one-level cylinder bottom 1 and communicate in first hydraulic cavity 23, second liquid lead-through pipe 9 passes the side arm through-hole of one-level cylinder 2 and communicate in second hydraulic cavity 24, third liquid lead-through pipe 10 set up in tertiary cylinder 6, the one end of third liquid lead-through pipe 10 is passed the lateral wall through-hole of tertiary cylinder top 7, the other end of third liquid lead-through pipe 10 passes the lateral wall through-hole of tertiary cylinder bottom 5 and communicate in fourth hydraulic cavity 26.

Further according to the pure water pneumatic cylinder structure, wherein first liquid pipe 8, second liquid pipe 9 and third liquid pipe 10 are the stainless steel liquid pipe.

Further according to the utility model discloses a pure water pneumatic cylinder structure, wherein the internal surface of one-level jar 16 the internal and external surface of second grade jar 17 with the surface of tertiary jar 18 is anticorrosive face.

The utility model discloses a main innovation technique and technological effect include at least:

1) the utility model provides a brand-new tertiary pneumatic cylinder structure that can work in pure water has innovated tertiary hydraulic means.

2) The stainless steel liquid through pipe which is innovatively arranged is pre-buried in the three-stage hydraulic cylinder, so that the process of performing anticorrosive treatment on the hydraulic cavity in the three-stage cylinder is omitted, and the cost of the anticorrosive treatment is saved;

3) the utility model discloses the innovation sets up the anticorrosive coating at tertiary jar outer wall, and the pre-buried stainless steel leads to the liquid pipe in tertiary jar, leads to the liquid pipe and runs through the logical liquid aperture at tertiary jar both ends, makes water and cylinder body mother metal keep apart completely, leads to the liquid aperture and has also had anticorrosive, accomplishes anticorrosive no dead angle;

4) the utility model discloses the pre-buried stainless steel liquid pipe that leads to in tertiary jar of innovation makes hydraulic pressure effectively circulate from liquid pipe, need not fill up tertiary jar inner chamber, under the same operating mode, has reduced the use amount of water, improves the water utilization ratio;

5) the utility model discloses the innovation has the anticorrosive coating at one-level jar inner wall, pre-buried stainless steel leads to the liquid pipe in the one-level jar, leads to the liquid pipe and runs through the logical liquid aperture at one-level jar both ends, makes water and cylinder body mother metal keep apart completely, leads to the liquid aperture and has also had anticorrosive, accomplishes anticorrosive no dead angle;

6) the bottom of the second-stage cylinder is made of stainless steel, and the inner surface and the outer surface of the cylinder barrel are provided with the anticorrosive layers, so that the anticorrosive effect of the second-stage cylinder is ensured;

7) the utility model discloses the hydraulic pressure cavity structure of four independent operations is marked off through one-level bottom direction seal structure, one-level oral area direction seal structure, second grade bottom direction seal structure, second grade oral area direction seal structure to control through the bottom valve realizes the flexible drive of tertiary cylinder body, and all sealing structure are stainless steel, and the sealing material is elastic corrosion-resistant material, belongs to the major innovation to tertiary hydraulic cylinder body structure.

To sum up, the utility model provides a pure water pneumatic cylinder structure has realized that all positions with water contact are whole for anticorrosive material, and simple structure is reliable, has solved the problem of current pneumatic cylinder corrosion, has beaten solid basis for the pure water replaces the emulsion, has improved hydraulic cylinder's security, quality and life-span greatly, has reduced the emulsion to the influence of environment, has wide popularization and application prospect, simultaneously pure water pneumatic cylinder structure, its simple structure, preparation convenience belong to new generation pure water pneumatic cylinder structure.

Drawings

Fig. 1 is the overall structure schematic diagram of the pure water hydraulic cylinder structure of the utility model.

The meanings of the reference symbols in the figures are as follows:

1. a first-stage cylinder bottom; 2. a first-stage cylinder barrel; 3. a second-stage cylinder bottom; 4. a second-stage cylinder barrel; 5. a third-stage cylinder bottom; 6. a third-stage cylinder barrel; 7. third-stage cylinder top; 8. a first liquid through pipe; 9. a second liquid through pipe; 10. a third liquid passing pipe; 11. a primary bottom guide seal structure; 12. a primary mouth guide sealing structure; 13. a secondary bottom guide sealing structure; 14. a secondary mouth guide sealing structure; 15. a bottom valve; 16. a primary cylinder; 17. a secondary cylinder; 18. a third-stage cylinder; 19. welding seams; 20. welding seams; 21. welding seams; 22. welding seams; 23. a first hydraulic chamber; 24-a second hydraulic chamber; 25-a third hydraulic chamber; 26-fourth hydraulic chamber.

Detailed Description

The present invention will be further described with reference to the accompanying drawings so as to enable those skilled in the art to more clearly understand the present invention, but the scope of the present invention is not limited thereby.

The utility model provides a pure water hydraulic cylinder structure, as shown in figure 1, including one-level cylinder bottom 1, one-level cylinder 2, second grade cylinder bottom 3, second grade cylinder 4, tertiary cylinder bottom 5, tertiary cylinder 6, tertiary cylinder top 7, first liquid pipe 8, second liquid pipe 9, third liquid pipe 10, one-level bottom direction seal structure 11, one-level oral area direction seal structure 12, second grade bottom direction seal structure 13, second grade oral area direction seal structure 14 and bottom valve 15. The primary cylinder bottom 1 and the primary cylinder barrel 2 are connected by welding to form a primary cylinder 16; the secondary cylinder bottom 3 and the secondary cylinder barrel 4 are connected by welding to form a secondary cylinder 17; the three-stage cylinder bottom 5, the three-stage cylinder barrel 6 and the three-stage cylinder top 7 are connected through welding to form a three-stage cylinder 18, wherein the three-stage cylinder bottom 5 and the three-stage cylinder top 7 are respectively welded to the bottom end and the top end of the three-stage cylinder barrel 6; the first liquid through pipe 8 is connected with the primary cylinder 16 through welding; the second liquid through pipe 9 is connected with the primary cylinder 16 through welding; the third liquid passing pipe 10 is connected with a third-stage cylinder 18 through welding; the primary bottom guide sealing structure 11 and the primary mouth guide sealing structure 12 are arranged between a primary cylinder 16 and a secondary cylinder 17; the secondary bottom guide sealing structure 13 and the secondary mouth guide sealing structure 14 are arranged between the secondary cylinder 17 and the tertiary cylinder 18; the bottom valve 15 is installed in a through hole of the secondary cylinder bottom 3.

Further according to the utility model discloses a pure water hydraulic cylinder structure, first liquid passing pipe 8 is stainless steel, first order jar 16 is 27SiMn material, first liquid passing pipe 8 passes the lateral wall through-hole of the one-level bottom of jar 16 and communicates in the one-level jar, its length is more than or equal to the through-hole depth of the one-level 16 bottom side arm, and fill the welding with stainless steel welding material at the welding seam 19 department of first liquid passing pipe 8 and through-hole, guarantee first liquid passing pipe communicate in one-level jar inner chamber and guarantee the seal of one-level jar inner chamber simultaneously; the second liquid communication pipe 9 is made of stainless steel, the second liquid communication pipe 9 penetrates through a through hole in a side wall of the top of the first-stage cylinder barrel 2 of the first-stage cylinder 16 and is communicated with the first-stage cylinder, the length of the second liquid communication pipe is larger than or equal to the depth of the through hole in the side wall of the top of the first-stage cylinder 16, a welding seam 20 between the second liquid communication pipe and the through hole is filled and welded with stainless steel welding materials, and the second liquid communication pipe is communicated with an inner cavity of the first-stage cylinder while the tightness of the inner cavity of the first-stage cylinder is guaranteed. After welding, an anticorrosive layer is integrally cladded on the hydraulic contact surface of the primary cylinder 16, finally, all the surfaces of the primary cylinder 16 and the hydraulic contact surface are anticorrosive surfaces, and the first liquid through pipe and the second liquid through pipe are respectively communicated with the inner cavity of the primary cylinder at the bottom and the top of the primary cylinder. Third tee bend liquid pipe 10 is stainless steel material, and second grade jar 17 is 27SiMn material, both ends pass from inside to outside respectively about third tee bend liquid pipe 10 tertiary jar 18, and communicate in the second grade jar is specific third tee bend liquid pipe set up in the tertiary cylinder 6 of tertiary jar 16, the lateral wall through-hole of tertiary cylinder top 7 of tertiary jar 16 is passed to the one end of third tee bend liquid pipe 10 to locate to fill the welding with stainless steel material with the welding seam 22 of through-hole, guarantee the leakproofness, the lateral wall through-hole of 5 at the bottom of the tertiary jar of tertiary jar 16 is passed to the other end of third tee bend liquid pipe 10 to locate to fill the welding with stainless steel material with the welding seam 21 of through-hole, guarantee the leakproofness.

Further basis pure water pneumatic cylinder structure, second grade jar 17 set up in the one-level jar to set up one-level bottom direction seal structure 11 between the second grade cylinder bottom 3 of second grade jar 17 and the one-level cylinder 2 of one-level jar, set up one-level oral area direction seal structure 12 between the nozzle of the second grade cylinder 4 of second grade jar 17 and the one-level cylinder 2 of one-level jar, make the second grade jar can be sealed flexible removal in the cylinder body inner chamber of one-level jar. The inner surface and the outer surface of the secondary cylinder 17 are coated with an anticorrosive layer; finally, all the surfaces of the secondary cylinder 17 which are in contact with the hydraulic pressure are formed into anti-corrosion surfaces. The structural members of the first-level bottom guide sealing structure 11 and the first-level mouth guide sealing structure 12 are both made of stainless steel, and the sealing material is made of corrosion-resistant elastic material. Through the primary bottom guide sealing structure 11 and the primary mouth guide sealing structure 12, a first hydraulic cavity 23 is formed between the primary cylinder bottom 1 of the primary cylinder 16 and the secondary cylinder bottom 3 of the secondary cylinder, the first liquid through pipe 8 is communicated with the first hydraulic cavity 23, a second hydraulic cavity 24 is formed between the primary cylinder barrel 2 of the primary cylinder 16 and the secondary cylinder barrel 4 of the secondary cylinder, and the second liquid through pipe 9 is communicated with the second hydraulic cavity 24; the first hydraulic cavity 23 and the second hydraulic cavity 24 are independent from each other and are sealed from each other, and the secondary cylinder 17 and the primary cylinder 16 can slide coaxially and relatively along the axial direction under the action of hydraulic liquid in the first hydraulic cavity 23 and the second hydraulic cavity 24.

Further basis pure water hydraulic cylinder structure, tertiary jar 18 set up in the second grade jar 17 to set up second grade bottom direction seal structure 13 between tertiary cylinder end 5 of tertiary jar 18 and the second grade cylinder 4 of second grade jar, set up second grade oral area direction seal structure 14 between the nozzle of the tertiary cylinder 6 of tertiary jar 18 and the second grade cylinder 4 of second grade jar, make tertiary jar can be sealed flexible removal in the cylinder body inner chamber of second grade jar. All exposed surfaces of the three-stage cylinder 18 are integrally formed into an anti-corrosion layer, and finally all surfaces of the three-stage cylinder 18, which are in contact with hydraulic pressure, are anti-corrosion surfaces. The structural members of the secondary bottom guide sealing structure 13 and the secondary mouth guide sealing structure 14 are both made of stainless steel, and the sealing material is made of corrosion-resistant elastic material. Through the second-stage bottom guide sealing structure 13 and the second-stage opening guide sealing structure 14, a third hydraulic cavity 25 is formed between the second-stage bottom 3 of the second-stage cylinder 17 and the third-stage bottom 5 of the third-stage cylinder, a fourth hydraulic cavity 26 is formed between the second-stage cylinder barrel 4 of the second-stage cylinder 17 and the third-stage cylinder barrel 6 of the third-stage cylinder, and the third liquid-passing pipe 10 is communicated with the fourth hydraulic cavity 24; the third hydraulic cavity 25 and the fourth hydraulic cavity 26 are independent from each other and are sealed from each other, and the tertiary cylinder 18 and the secondary cylinder 17 can coaxially slide relatively along the axial direction under the action of hydraulic liquid in the third hydraulic cavity 25 and the fourth hydraulic cavity 26.

Further according to pure water pneumatic cylinder structure, bottom valve 15 installs in the bottom through-hole of the second grade cylinder bottom of second grade jar 17, and first hydraulic chamber 23 and third hydraulic chamber 25 are connected at bottom valve 15's both ends, through the intercommunication and airtight between first hydraulic chamber 23 of bottom valve control and the third hydraulic chamber 25.

The working principle of the pure water hydraulic cylinder structure is as follows: when the stretching work is started, the first hydraulic cavity 23 is fed with liquid through the first liquid through pipe 8, the second hydraulic cavity 24 is discharged with liquid through the second liquid through pipe 9, and the secondary cylinder 17 and the tertiary cylinder 18 stretch out simultaneously; after the secondary cylinder 17 reaches a limited position, the bottom valve 15 is controlled to be opened, hydraulic liquid flows from the first hydraulic cavity 23 to the third hydraulic cavity 25 through the bottom valve, the fourth hydraulic cavity 26 discharges the liquid through the third liquid through pipe 10, the secondary cylinder 17 is kept still, and the tertiary cylinder 18 extends out; when the third-stage cylinder 18 reaches the limit, the bottom valve 15 is controlled to be closed; and when the withdrawing work is started, the first hydraulic cavity 23 discharges liquid through the first liquid through pipe 8, the second hydraulic cavity 24 feeds liquid through the second liquid through pipe 9, the second-stage cylinder 17 withdraws, after the second-stage cylinder 17 reaches a limited position, the bottom valve 15 is controlled to be opened, the third hydraulic cavity 25 discharges liquid, the liquid is discharged through the first liquid through pipe 8 through the first hydraulic cavity 23, the fourth hydraulic cavity 26 feeds liquid through the third liquid through pipe 10, the second-stage cylinder 17 is kept still, and the third-stage cylinder 18 withdraws. In the process of reciprocating work, the first hydraulic cavity 23, the second hydraulic cavity 24, the third hydraulic cavity 25 and the fourth hydraulic cavity 26 are constantly changed, the inner wall of the whole hydraulic cavity is always kept to be made of corrosion-resistant materials, and the first liquid through pipe 8, the second liquid through pipe 9 and the third liquid through pipe 10 are made of stainless steel materials, so that hydraulic reciprocating circulation is in a closed corrosion-resistant environment.

The above description is only for the preferred embodiment of the present invention, and the technical solution of the present invention is not limited thereto, and any known modifications made by those skilled in the art on the basis of the main technical idea of the present invention belong to the technical scope to be protected by the present invention, and the specific protection scope of the present invention is subject to the description of the claims.

Claims

1. A pure water hydraulic cylinder structure, comprising: one-level cylinder bottom (1), one-level cylinder (2), second grade cylinder bottom (3), second grade cylinder (4), tertiary cylinder bottom (5), tertiary cylinder (6), tertiary cylinder top (7), one-level cylinder bottom (1) and one-level cylinder (2) are connected and are formed one-level jar (16), second grade cylinder bottom (3) and second grade cylinder (4) are connected and are formed second grade jar (17), tertiary cylinder bottom (5), tertiary cylinder (6) and tertiary cylinder top (7) are connected and are formed tertiary jar (18), tertiary jar (18) set up in second grade jar (17), second grade jar (17) set up in one-level jar (16).

2. The pure water hydraulic cylinder structure according to claim 1, characterized in that a first hydraulic cavity (23) is formed between the primary cylinder bottom (1) and the secondary cylinder bottom (3), a second hydraulic cavity (24) is formed between the primary cylinder barrel (2) and the secondary cylinder barrel (4), a third hydraulic cavity (25) is formed between the secondary cylinder bottom (3) and the tertiary cylinder bottom (5), and a fourth hydraulic cavity (26) is formed between the secondary cylinder barrel (4) and the tertiary cylinder barrel (6).

3. The pure water hydraulic cylinder structure according to claim 2, characterized in that a bottom valve (15) is mounted on the secondary cylinder bottom (3), the first hydraulic cavity (23) and the second hydraulic cavity (24) are independent and sealed from each other, the third hydraulic cavity (25) and the fourth hydraulic cavity (26) are independent and sealed from each other, and the first hydraulic cavity (23) and the third hydraulic cavity (25) are communicated with and sealed from each other through the bottom valve (15).

4. The pure water hydraulic cylinder structure according to claim 3, characterized in that a primary bottom guide seal structure (11) is arranged between the secondary cylinder bottom (3) and the primary cylinder barrel (2), a first-stage mouth part guide sealing structure (12) is arranged between the second-stage cylinder barrel (4) and the first-stage cylinder barrel (2), a secondary bottom guide sealing structure (13) is arranged between the tertiary cylinder bottom (5) and the secondary cylinder barrel (4), a second-stage mouth part guide sealing structure (14) is arranged between the third-stage cylinder barrel (6) and the second-stage cylinder barrel (4), the first hydraulic cavity (23) and the second hydraulic cavity (24) are independent and mutually sealed through the primary bottom guide sealing structure (11), the third hydraulic chamber (25) and the fourth hydraulic chamber (26) are independent of each other and sealed from each other by the secondary bottom guide seal (13).

5. The pure water hydraulic cylinder structure according to claim 4, wherein the primary bottom guide seal structure (11), the primary mouth guide seal structure (12), the secondary bottom guide seal structure (13) and the secondary mouth guide seal structure (14) each comprise a seal structural member and a seal elastic member, the seal structural member is a stainless steel structural member, and the seal elastic member is a corrosion-resistant elastic member.

6. The pure water hydraulic cylinder structure according to any one of claims 2-5, characterized in that the first hydraulic chamber (23) is connected to a first liquid passing pipe (8), the second hydraulic chamber (24) is connected to a second liquid passing pipe (9), and the fourth hydraulic chamber (26) is connected to a third liquid passing pipe (10).

7. The pure water hydraulic cylinder structure according to claim 6, wherein the first liquid passing pipe (8) passes through a side wall through hole of the primary cylinder bottom (1) and is communicated with the first hydraulic cavity (23), the second liquid passing pipe (9) passes through a side wall through hole of the primary cylinder barrel (2) and is communicated with the second hydraulic cavity (24), the third liquid passing pipe (10) is arranged in the tertiary cylinder barrel (6), one end of the third liquid passing pipe (10) passes through a side wall through hole of the tertiary cylinder top (7), and the other end of the third liquid passing pipe (10) passes through a side wall through hole of the tertiary cylinder bottom (5) and is communicated with the fourth hydraulic cavity (26).

8. The pure water hydraulic cylinder structure according to claim 7, characterized in that the first liquid passing pipe (8), the second liquid passing pipe (9) and the third liquid passing pipe (10) are stainless steel liquid passing pipes.

9. The pure water hydraulic cylinder structure according to any one of claims 1 to 5, wherein the inner surface of the primary cylinder (16), the inner and outer surfaces of the secondary cylinder (17), and the outer surface of the tertiary cylinder (18) are corrosion-resistant surfaces.