CN212055344U

CN212055344U - Tight hydro-cylinder prefill valve structure rises

Info

Publication number: CN212055344U
Application number: CN202020549516.2U
Authority: CN
Inventors: 全怀东; 尚建波; 冯淑英
Original assignee: Shandong Hengyuan Construction Machinery Co Ltd
Current assignee: Shandong Hengyuan Construction Machinery Co Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-12-01
Anticipated expiration: 2030-04-15

Abstract

The utility model provides a tight hydro-cylinder prefill valve structure rises, including casing and manometer, open in the middle of the casing inside is equipped with the oil return storehouse, and the downside in oil return storehouse has seted up the inside groove, the inside of inside groove is provided with the spring, and the downside of spring is provided with first seal ring, the bottom of spring is connected with the piston, and the piston setting is in oil return end, oil return end's top is connected with the bottom of inside groove, and the left and right sides of oil return end upper end is provided with back oil pipe respectively, it all sets up inside the casing to return oil pipe, and returns oil pipe's top and be connected with oil return storehouse's bottom respectively, both ends are provided with one-way outlet valve respectively about oil return storehouse downside, and one-way outlet valve's bottom all is provided with out. The utility model discloses a, overall structure is succinct, and inside separates the oil return through oil return storehouse and oil storage storehouse and stores, and the bottom is curved piston cooperation top stopper and has improved oil return efficiency.

Description

Tight hydro-cylinder prefill valve structure rises

Technical Field

The utility model relates to a prefill valve field especially relates to a tight hydro-cylinder prefill valve structure rises.

Background

The liquid filling valve is widely applied to machines such as forging machinery, a high-speed punch press, a press machine, an injection molding machine and the like, can enable a press oil cylinder to play a role in quickly filling and discharging oil in the forging machinery, can play an unloading role in high pressure and large flow, and avoids unloading impact.

However, the piston inside the currently used prefill valve is generally complex in integral structure, and the cross-sectional area of the piston is generally large, so that large driving force is needed during oil return, and the overall oil return efficiency is low.

Therefore, it is necessary to provide a structure of a hydraulic filling valve for a tensioning cylinder to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a tight hydro-cylinder prefill valve structure rises, it is complicated to have solved the inside piston overall structure usually of prefill valve that uses at present, and the cross-sectional area of piston is great usually, consequently needs great driving force when the oil return, the lower problem of whole oil return efficiency.

In order to solve the technical problem, the utility model provides a tensioning oil cylinder prefill valve structure, which comprises a shell and a pressure gauge, wherein an oil return bin is arranged in the middle of the inner part of the shell, an inner groove is arranged on the lower side of the oil return bin, a spring is arranged inside the inner groove, a first sealing washer is arranged on the lower side of the spring, a piston is connected to the bottom of the spring and is arranged in an oil return end, the top end of the oil return end is connected with the bottom of the inner groove, oil return pipes are respectively arranged on the left side and the right side of the upper end of the oil return end, the oil return pipes are all arranged inside the shell, the top ends of the oil return pipes are respectively connected with the bottom of the oil return bin, one-way oil outlet valves are respectively arranged on the left end and the right end of the lower side of the oil return bin, oil outlet pipes are respectively arranged on the bottom of the one-way oil outlet valves, the top of piston runs through the spring in proper order and second seal ring is connected with the top stopper, and second seal ring sets up in the middle of the bottom in oil return bin, the top setting of top stopper is in the oil storage bin, and the bottom in oil storage bin is connected with the top in oil return bin, the top in oil storage bin is provided with the oil transportation end, and the oil transportation end runs through the top of casing, the manometer sets up in the middle of the right side of casing, and the manometer runs through the casing right side and is connected with the oil return bin.

Preferably, the lower end of the outer wall of the shell is of an external thread structure, and the central axis of the shell and the central axis of the oil return end are on the same vertical straight line.

Preferably, the diameter of the inner wall of the lower end of the oil return bin is larger than that of the inner wall of the upper end of the oil return bin, and the diameter of the inner wall of the upper end of the oil return bin is smaller than that of the inner wall of the oil storage bin.

Preferably, the inner wall of the inner groove is in a spline structure, and the inner wall of the inner groove is connected with the bottom end of the spring in a sliding manner.

Preferably, the spring, the piston and the top plug form a telescopic structure, the piston is connected with the oil return end in a sliding mode, and the bottom of the piston is of an inner arc structure.

Preferably, the oil return pipe is provided with 2 oil return ends in a symmetrical manner about the central axis, and the central axis of the oil return end and the central axis of the inner groove are on the same vertical straight line.

Preferably, the diameter of the top plug is gradually reduced from top to bottom, the diameter of the top plug is smaller than the diameter of the inner wall of the inner groove, and the top end of the top plug is of an arc-shaped structure.

Compared with the prior art, the utility model provides a pair of tight hydro-cylinder prefill valve structure rises has following beneficial effect:

1. the utility model discloses be provided with casing, oil return end and oil delivery end, the whole appearance of casing is succinct, and the external screw thread structure of cooperation housing face lower extreme is convenient for be connected the whole tight hydro-cylinder that rises of device, and is convenient for be connected tight hydro-cylinder that rises with outside oil circuit through oil return end and oil delivery end, has improved the practicality.

2. The utility model discloses be provided with spring, piston, return oil end and return oil pipe, can promote the piston along returning oil end inner wall upwards sliding when the inside oil pressure of tight hydro-cylinder that rises is too high, when the bottom of piston removes to the top of returning oil pipe lower extreme, the oil in the tight hydro-cylinder that rises can flow back to the oil return storehouse fast through returning oil pipe, and the pressure that the piston received at this moment reduces, resumes to initial position under the promotion of spring, and then seals returning oil pipe again.

3. The utility model discloses be provided with return oil bin, top stopper and oil storage bin, the top stopper can follow the piston and reciprocate in step, and when piston and top stopper moved up in step, communicate each other between return oil bin and the oil storage bin, the oil of storing in the messenger oil storage bin can remove to return oil bin rapidly, pours into tight hydro-cylinder that rises into again through one-way delivery valve and play oil pipe at last, has improved oil return efficiency.

Drawings

Fig. 1 is a schematic view of a front view structure of a charging valve structure of a tensioning cylinder provided by the present invention;

fig. 2 is a schematic view of the front side of the internal structure of a charging valve structure of a tensioning cylinder provided by the present invention;

FIG. 3 is a schematic top view of the inner tank of FIG. 1;

FIG. 4 is a schematic view of a connection structure of the inner groove and the spring shown in FIG. 1;

fig. 5 is an enlarged schematic view of a portion a shown in fig. 2.

Reference numbers in the figures: 1. a housing; 2. an oil return bin; 3. an inner tank; 4. a spring; 5. a first sealing gasket; 6. a piston; 7. an oil return end; 8. an oil return pipe; 9. a one-way oil outlet valve; 10. an oil outlet pipe; 11. a second sealing gasket; 12. a top plug; 13. an oil storage bin; 14. an oil delivery end; 15. and a pressure gauge.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Please refer to fig. 1, fig. 2, fig. 3 and fig. 4 in combination, wherein fig. 1 is a schematic front view of a charging valve structure of a tensioning cylinder according to the present invention; fig. 2 is a schematic view of the front side of the internal structure of a charging valve structure of a tensioning cylinder provided by the present invention; FIG. 3 is a schematic top view of the inner tank of FIG. 1; FIG. 4 is a schematic view of a connection structure of the inner groove and the spring shown in FIG. 1; fig. 5 is an enlarged schematic view of a portion a shown in fig. 2. A tensioning oil cylinder liquid filling valve structure comprises a shell 1 and a pressure gauge 15, wherein a return oil bin 2 is arranged in the middle of the inside of the shell 1, an inner groove 3 is formed in the lower side of the return oil bin 2, a spring 4 is arranged inside the inner groove 3, a first sealing washer 5 is arranged on the lower side of the spring 4, a piston 6 is connected to the bottom of the spring 4, the piston 6 is arranged in a return oil end 7, the top end of the return oil end 7 is connected with the bottom of the inner groove 3, return oil pipes 8 are respectively arranged on the left side and the right side of the upper end of the return oil end 7, the return oil pipes 8 are arranged inside the shell 1, the top ends of the return oil pipes 8 are respectively connected with the bottom of the return oil bin 2, one-way oil outlet valves 9 are respectively arranged on the left end and the right end of the lower side of the return oil bin 2, oil outlet pipes 10 are respectively arranged on the bottom of the one-way oil outlet valves, the top of piston 6 runs through spring 4 and second seal ring 11 in proper order and is connected with top plug 12, and second seal ring 11 sets up in the middle of the bottom in oil return storehouse 2, the top of top plug 12 sets up in oil storage storehouse 13, and the bottom in oil storage storehouse 13 is connected with the top in oil return storehouse 2, the top in oil storage storehouse 13 is provided with oil transportation end 14, and oil transportation end 14 runs through the top of casing 1, manometer 15 sets up in the middle of the right side of casing 1, and manometer 15 runs through the casing 1 right side and is connected with oil return storehouse 2.

The outer wall lower extreme of casing 1 is external screw thread structure, and the axis of casing 1 and the axis of returning oil end 7 on same vertical straight line, has improved the whole convenience when carrying out the dismouting of casing 1 through external screw thread structure.

The inner wall diameter of 2 lower extremes in the oil return storehouse is greater than the inner wall diameter of 2 upper ends in the oil return storehouse, and the inner wall diameter of 2 upper ends in the oil return storehouse is less than the inner wall diameter of oil storage storehouse 13, is convenient for carry out temporary storage to the oil return through solitary cavity in the oil return storehouse 2, has improved oil return efficiency.

The inner wall of inside groove 3 is spline structure, and the connected mode of 3 inner walls in inside groove and 4 bottoms of spring be sliding connection, can effectively avoid spring 4 to take place relative rotation at the slip in-process through spline structure, has improved stability in use.

Spring 4, piston 6 and top stopper 12 constitute extending structure, and piston 6 is sliding connection with the connected mode that returns oil end 7, and the bottom of piston 6 is interior arc structure simultaneously, through interior arc structure under the condition that reduces the whole cross-sectional area of piston 6 the area of contact with oil has been improved, improved the efficiency that promotes piston 6.

The oil return pipe 8 is provided with 2 in a symmetrical mode about the central axis of the oil return end 7, and the central axis of the oil return end 7 and the central axis of the inner groove 3 are on the same vertical straight line, so that the oil return speed in unit time is improved through the two oil return pipes 8.

The diameter of top stopper 12 decreases progressively from the top down, and the top diameter of top stopper 12 is less than the inner wall diameter of interior groove 3, and the top of top stopper 12 is the arc structure simultaneously, carries out dynamic adjustment through top stopper 12 to the intercommunication between oil return storehouse 2 and the oil storage storehouse 13, has improved the convenience of use.

The utility model provides a pair of tight hydro-cylinder prefill valve structure's that rises theory of operation as follows:

when the device is used, firstly, the whole device is connected with a tensioning oil cylinder, then an oil delivery end 14 is connected with an external oil pipe, when the oil pressure in the tensioning oil cylinder is too high, a piston 6 is pushed upwards to drive the piston 6 to start to move upwards along the inner wall of an oil return end 7, the movable piston 6 synchronously extrudes a spring 4 upwards and drives a top plug 12 to start to move upwards, the oil return bin 2 and an oil storage bin 13 are communicated with each other along with the upward movement of the top plug 12, when the bottom of the piston 6 moves to the upper part of the bottom of the oil return pipe 8, hydraulic oil in the tensioning oil cylinder starts to be injected into the oil return bin 2 through the oil return pipe 8, the pressure borne by the piston 6 is reduced, the piston 6 is restored to an initial position under the pushing of the spring 4, the oil return pipe 8 is sealed again through the piston 6, the top plug 12 blocks the connection between the oil return bin 2 and the oil storage bin 13 again, and the return oil is temporarily stored, meanwhile, certain air is stored in the oil storage bin 13, when the oil pressure in the tensioning oil cylinder is too low, the oil stored in the oil return bin 2 is sucked into the tensioning oil cylinder through the oil outlet pipe 10 and the one-way oil outlet valve 9, and extra hydraulic oil is conveniently injected into the oil storage bin 13 through the oil delivery end 14 according to requirements.

1. the utility model discloses be provided with casing 1, oil return end 7 and oil delivery end 14, the whole appearance of casing 1 is succinct, and the external screw thread structure of cooperation 1 surperficial lower extreme is convenient for be connected the whole tight hydro-cylinder that rises of device, and is convenient for be connected tight hydro-cylinder that rises with outside oil circuit through oil return end 7 and oil delivery end 14, has improved the practicality.

2. The utility model discloses be provided with spring 4, piston 6, return oil end 7 and return oil pipe 8, can promote piston 6 and follow the 7 inner walls of oil return end and upwards slide when the inside oil pressure of tight hydro-cylinder that rises is too high, when the bottom of piston 6 removes to the top of returning oil pipe 8 lower extremes, the oil in the tight hydro-cylinder that rises can flow back to back the oil bin 2 fast through returning oil pipe 8, the pressure that piston 6 received at this moment reduces, resume to initial position under spring 4's promotion, and then seal back oil pipe 8 again.

3. The utility model discloses be provided with return oil storehouse 2, top stopper 12 and oil storage storehouse 13, top stopper 12 can follow piston 6 and reciprocate in step, when piston 6 and top stopper 12 shift up in step, communicates each other between return oil storehouse 2 and the oil storage storehouse 13, makes the oil of storing in the oil storage storehouse 13 can remove to return oil storehouse 2 rapidly, pours into tight hydro-cylinder that rises into again through one-way delivery valve 9 and play oil pipe 10 at last, has improved oil return efficiency.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A tensioning oil cylinder liquid filling valve structure comprises a shell (1) and a pressure gauge (15), and is characterized in that an oil return bin (2) is arranged in the middle of the inside of the shell (1), an inner groove (3) is formed in the lower side of the oil return bin (2), a spring (4) is arranged inside the inner groove (3), a first sealing washer (5) is arranged on the lower side of the spring (4), a piston (6) is connected to the bottom of the spring (4), the piston (6) is arranged in an oil return end (7), the top end of the oil return end (7) is connected with the bottom of the inner groove (3), oil return pipes (8) are respectively arranged on the left side and the right side of the upper end of the oil return end (7), the oil return pipes (8) are respectively arranged inside the shell (1), the top ends of the oil return pipes (8) are respectively connected with the bottom of the oil return bin (2), and one-way oil outlet valves (9) are respectively arranged at the left end, and the bottom of the one-way oil outlet valve (9) is provided with an oil outlet pipe (10), the bottom of the oil outlet pipe (10) respectively penetrates through the left end and the right end of the bottom of the shell (1), and the oil outlet pipe (10) and the one-way oil outlet valve (9) are both arranged inside the shell (1), the top end of the piston (6) penetrates through the spring (4) and the second sealing washer (11) in sequence to be connected with the top plug (12), the second sealing washer (11) is arranged in the middle of the bottom of the oil return bin (2), the top end of the top plug (12) is arranged in the oil storage bin (13), the bottom of the oil storage bin (13) is connected with the top end of the oil return bin (2), the top end of the oil storage bin (13) is provided with an oil conveying end (14), the oil delivery end (14) penetrates through the top of the shell (1), the pressure gauge (15) is arranged in the middle of the right side of the shell (1), and the pressure gauge (15) penetrates through the right side of the shell (1) and is connected with the oil return bin (2).

2. The tensioning oil cylinder liquid filling valve structure according to claim 1, wherein the lower end of the outer wall of the housing (1) is of an external thread structure, and the central axis of the housing (1) and the central axis of the oil return end (7) are on the same vertical line.

3. The tensioning oil cylinder liquid filling valve structure according to claim 1, wherein the diameter of the inner wall of the lower end of the oil return bin (2) is larger than the diameter of the inner wall of the upper end of the oil return bin (2), and the diameter of the inner wall of the upper end of the oil return bin (2) is smaller than the diameter of the inner wall of the oil storage bin (13).

4. The tensioning oil cylinder liquid filling valve structure as claimed in claim 1, wherein the inner wall of the inner groove (3) is in a spline structure, and the inner wall of the inner groove (3) is connected with the bottom end of the spring (4) in a sliding manner.

5. The tensioning oil cylinder prefill valve structure according to claim 1, wherein the spring (4), the piston (6) and the top plug (12) form a telescopic structure, the piston (6) is connected with the oil return end (7) in a sliding manner, and the bottom of the piston (6) is of an inner arc structure.

6. The tensioning cylinder prefill valve structure according to claim 1, wherein the number of the oil return pipes (8) is 2 symmetrically arranged about the central axis of the oil return end (7), and the central axis of the oil return end (7) and the central axis of the inner groove (3) are on the same vertical line.

7. The tensioning cylinder prefill valve structure according to claim 1, wherein the diameter of the top plug (12) decreases from top to bottom, the diameter of the top plug (12) is smaller than the diameter of the inner wall of the inner groove (3), and the top end of the top plug (12) is in an arc structure.