CN216241568U - High-pressure variable pressure gradient hydraulic safety valve - Google Patents
High-pressure variable pressure gradient hydraulic safety valve Download PDFInfo
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- CN216241568U CN216241568U CN202122837788.XU CN202122837788U CN216241568U CN 216241568 U CN216241568 U CN 216241568U CN 202122837788 U CN202122837788 U CN 202122837788U CN 216241568 U CN216241568 U CN 216241568U
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Abstract
The utility model relates to the technical field of hydraulic safety valves, in particular to a high-pressure variable-pressure gradient hydraulic safety valve. The safety valve includes: the valve seat assembly comprises a valve seat, a variable-diameter valve, a spring seat, a spring and a shell; a mounting cavity is arranged in the shell; an outlet is formed in the opening end of the shell and communicated with the mounting cavity, the valve seat assembly is mounted at the opening of the mounting cavity, a spring is mounted at the bottom of the mounting cavity, and the spring supports the spring seat; the ground of the spring seat is provided with a blind hole with a conical bottom surface; the valve seat assembly comprises a valve seat and a T-shaped damping cap; the valve seat is provided with a through hole with a middle rope retracting along the axial direction, and the middle part of the right section of the through hole is provided with an oil passing hole along the radial direction; the diameter-variable valve comprises a damping section, a connecting section, a sealing section, a diameter-variable section, a guiding section and a matching section from left to right; the big end of the T-shaped damping cap is provided with a long circular arc-shaped hole surrounding the small end; the small end face of the T-shaped damping cap is provided with a blind hole downwards.
Description
Technical Field
The utility model relates to the technical field of hydraulic safety valves, in particular to a high-pressure variable-pressure gradient hydraulic safety valve.
Background
The variable pressure gradient hydraulic safety valve is not available in the domestic aviation field, a high-pressure large-flow safety valve of a hydraulic system of an airplane adopts a pilot type or undamped piston direct-acting type, the pilot type structure is complex, the reliability is low, limited space is occupied, the weight is increased, the layout of other accessories is influenced, and the variable pressure gradient direct-acting type safety valve has the problems of sudden pressure jump, poor internal sealing performance, low reliability, short service life and the like and influences the safety of the system.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims to solve the technical problem of eliminating the pressure kick problem when the high-pressure hydraulic safety valve works.
The technical scheme is as follows:
provided is a high-pressure variable-pressure gradient hydraulic safety valve, comprising: the valve seat assembly comprises a valve seat, a variable-diameter valve, a spring seat, a spring and a shell;
a mounting cavity is arranged in the shell; an outlet is formed in the opening end of the shell and communicated with the mounting cavity, the valve seat assembly is mounted at the opening of the mounting cavity, a spring is mounted at the bottom of the mounting cavity, and the spring supports the spring seat; the ground of the spring seat is provided with a blind hole with a conical bottom surface; the valve seat assembly comprises a valve seat and a T-shaped damping cap; the valve seat is provided with a through hole with a middle rope retracting along the axial direction, and the middle part of the right section of the through hole is provided with an oil passing hole along the radial direction; the diameter-variable valve comprises a damping section, a connecting section, a sealing section, a diameter-variable section, a guiding section and a matching section from left to right; the big end of the T-shaped damping cap is provided with a long circular arc-shaped hole surrounding the small end; a blind hole is formed downwards on the small end face of the T-shaped damping cap;
the left port at the valve seat is installed to the main aspects of T shape damping cap, and the tip of T shape damping cap is located the left section of through-hole, and the blind hole of tip is as the damping chamber of damping section, and sealed section forms sealed vice with the receipts cable section of through-hole, and reducing section and guide section are located the right branch of through-hole, and the guide section is with the little clearance fit of the right branch inner wall of through-hole, and the cooperation section stretches into the blind hole of spring holder from the right branch of through-hole, supports the conical surface of blind hole.
Further, the reducing section is provided with a plurality of steps.
Furthermore, the top surface of the matching section is a spherical surface.
Furthermore, the big end of the T-shaped damping cap is in interference fit with the left port of the valve seat.
Furthermore, a small oil passage is arranged on the guide section along the radial direction.
Furthermore, an adjusting gasket is arranged between the bottom surface of the mounting cavity and the spring.
Has the advantages that: the safety valve is stable in the working process and free of pressure and flow sudden jumps, the problems that the safety valve with the existing structure cannot be closed due to pressure and flow sudden jumps during working can be effectively solved, and the safety, reliability and durability of the system are improved.
Drawings
FIG. 1 is a schematic diagram of a high pressure variable pressure gradient hydraulic safety valve according to the present invention; 1-a shutter base assembly; 2-sealing ring; 3-a guard circle; 4-a diameter-variable valve; 5-spring seats; 6-a spring; 7-sealing ring; 8-a shell; 9-adjusting the shim.
Fig. 2 is a pressure relief gradient change schematic diagram of a high-pressure variable pressure gradient hydraulic safety valve.
Detailed Description
The utility model provides a high-pressure variable pressure gradient hydraulic safety valve, as shown in figure 1, comprising: the valve seat assembly comprises a valve seat assembly 1, a variable-diameter valve 4, a spring seat 5, a spring 6 and a shell 8;
a mounting cavity is arranged in the shell 8; an outlet is formed in the opening end of the shell and is communicated with the installation cavity, the valve seat assembly 1 is installed at the opening of the installation cavity, a spring 6 is installed at the bottom of the installation cavity, and the spring 6 supports the spring seat 5; the ground of the spring seat 5 is provided with a blind hole with a conical bottom surface; the valve seat component 1 comprises a valve seat and a T-shaped damping cap; the valve seat is provided with a through hole with a middle rope retracting along the axial direction, and the middle part of the right section of the through hole is provided with an oil passing hole along the radial direction; the reducing valve 4 comprises a damping section, a connecting section, a sealing section, a reducing section, a guiding section and a matching section from left to right; the big end of the T-shaped damping cap is provided with a long circular arc-shaped hole surrounding the small end; a blind hole is formed downwards on the small end face of the T-shaped damping cap;
the left port at the valve seat is installed to the main aspects of T shape damping cap, and the tip of T shape damping cap is located the left section of through-hole, and the blind hole of tip is as the damping chamber of damping section, and sealed section forms sealed vice with the receipts cable section of through-hole, and reducing section and guide section are located the right branch of through-hole, and the guide section is with the little clearance fit of the right branch inner wall of through-hole, and the cooperation section stretches into the blind hole of spring holder 5 from the right branch of through-hole, supports the conical surface of blind hole.
The materials and specifications of the parts are shown in Table 1. The product performance parameters are shown in Table 2.
When the system pressure exceeds the allowable pressure, hydraulic oil overcomes the pretightening force of the spring (6) through the gap of the damping structure (4) from the inlet of the shell (1), pushes the damping structure (4) to move rightwards and flows out of the shell (8), and the system safety is ensured.
TABLE 1
TABLE 2
The high-pressure variable-pressure gradient hydraulic safety valve provided by the utility model fully utilizes hydraulic damping and pressure change gradient to eliminate pressure and flow mutation phenomena, the working stability of the product is improved by the dynamic damping liquid resistance of a gap structure which is easy to process and control and the pressure gradient caused by valve diameter change, when the valve moves, the pressure of a damping cavity changes through a damping gap, and meanwhile, the pressure gradient is slowly changed at the valve diameter change position, so that the stability of the product can be improved, and the pressure and flow mutation phenomena can be avoided.
Claims (6)
1. A high pressure variable pressure gradient hydraulic safety valve, comprising: the valve seat assembly (1), the variable-diameter valve (4), the spring seat (5), the spring (6) and the shell (8);
a mounting cavity is arranged in the shell (8); an outlet is formed in the opening end of the shell and is communicated with the mounting cavity, the valve seat assembly (1) is mounted at the opening of the mounting cavity, a spring (6) is mounted at the bottom of the mounting cavity, and the spring (6) supports the spring seat (5); the ground of the spring seat (5) is provided with a blind hole with a conical bottom surface; the valve seat assembly (1) comprises a valve seat and a T-shaped damping cap; the valve seat is provided with a through hole with a middle rope retracting along the axial direction, and the middle part of the right section of the through hole is provided with an oil passing hole along the radial direction; the diameter-variable valve (4) comprises a damping section, a connecting section, a sealing section, a diameter-variable section, a guide section and a matching section from left to right; the big end of the T-shaped damping cap is provided with a long circular arc-shaped hole surrounding the small end; a blind hole is formed downwards on the small end face of the T-shaped damping cap;
the left port at the valve seat is installed to the main aspects of T shape damping cap, the tip of T shape damping cap is located the left section of through-hole, the blind hole of tip is as the damping chamber of damping section, sealed section forms sealed vice with the receipts cable section of through-hole, reducing section and guide section are located the right side section of through-hole, the little clearance fit of the right side section inner wall of guide section and through-hole, the blind hole that spring holder (5) were stretched into from the right side section of through-hole to the cooperation section, support the conical surface of blind hole.
2. The safety valve of claim 1, wherein the reducer section is provided with a plurality of steps.
3. The safety valve of claim 1, wherein the top surface of the mating segment is spherical.
4. The safety valve of claim 1, wherein the large end of the T-shaped damping cap is in interference fit with the left port of the valve seat.
5. The safety valve of claim 1, wherein the pilot segment is provided with a small oil passage in a radial direction.
6. Safety valve according to claim 1, characterized in that a shim (9) is arranged between the bottom surface of the mounting chamber and the spring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122837788.XU CN216241568U (en) | 2021-11-18 | 2021-11-18 | High-pressure variable pressure gradient hydraulic safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122837788.XU CN216241568U (en) | 2021-11-18 | 2021-11-18 | High-pressure variable pressure gradient hydraulic safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216241568U true CN216241568U (en) | 2022-04-08 |
Family
ID=80947420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122837788.XU Active CN216241568U (en) | 2021-11-18 | 2021-11-18 | High-pressure variable pressure gradient hydraulic safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216241568U (en) |
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2021
- 2021-11-18 CN CN202122837788.XU patent/CN216241568U/en active Active
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