Stacked safety valve
By designing a stacked safety valve, the position of the spring seat is changed by adjusting the screw, and the spring preload is adjusted, which solves the problem that existing safety valves cannot meet the pressure relief requirements of different pipelines, thus improving safety and service life.
Patent Information
- Application Number
- CN202520576520.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-31
AI Technical Summary
Existing safety valves cannot adjust the spring preload, thus failing to meet the pressure relief requirements of different pipelines and resulting in insufficient safety.
A superimposed safety valve was designed. By adjusting the screw, the position of the spring seat in the valve body cavity is changed, and the preload of the spring is adjusted. Combined with the pressure relief channel and the oil flow pipeline, pressure relief can be achieved for pipelines with different pressure requirements.
It meets the pressure relief requirements of different pipelines, improves the operability of the safety valve, and extends its service life.
Smart Images
Figure CN223754732U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field, concretely relates to a superimposed safety valve. BACKGROUND
[0002] Safety valve is the closing part under the action of external force and is in the normally closed state, when the medium pressure in the equipment or pipeline rises over the specified value, it prevents the medium pressure in the pipeline or equipment from exceeding the specified value by discharging the medium to the system outside, is mainly used on the boiler, pressure vessel and pipeline, controls the pressure not to exceed the specified value, and plays an important protection role for personal safety and equipment operation.
[0003] When the medium flows in the pipeline, if the medium pressure is too high, the valve core needs to be moved to connect the valve body inner cavity and the pressure relief channel for pressure relief, and the valve core is automatically reset under the reaction force of the spring, but since different pipelines have different spring stress requirements, the existing safety valve cannot adjust the spring pre-tightening force to meet the pressure relief requirements of different pipelines. UTILITY MODEL CONTENTS
[0004] The technical problem to be solved by the utility model is to provide a superimposed safety valve, which can adjust the pre-tightening force of the spring to meet the pressure relief requirements of different pipelines and ensure the safety of the pipeline.
[0005] To solve the above technical problems, the technical scheme adopted by the utility model is as follows.
[0006] The superimposed safety valve comprises a mounting seat, a valve body assembly is installed in the mounting seat, the valve body assembly comprises a valve body and a valve seat installed at the left end of the valve body, a valve core that moves along the valve body inner cavity for pressure relief after the pressure exceeds the standard is slidably installed in the valve body, and the valve core is inserted and connected with the center through hole of the valve seat, the left end of the valve core is connected with a spring that drives the valve core to rebound and reset, the other end of the spring is connected with a spring seat arranged in the valve body, the spring seat is connected with an adjusting screw rod that adjusts the position of the spring seat in the valve body inner cavity and changes the pre-tightening force of the spring, and a pressure relief channel, an oil inlet and an oil outlet that are communicated with the valve body inner cavity are further arranged in the mounting seat.
[0007] The right end of the valve core is a conical structure, and the outer diameter of the left end of the valve core is greater than the diameter of the center through hole of the valve seat.
[0008] The adjusting screw rod is threadedly connected with the left end of the valve body, the right end of the adjusting screw rod is connected with the spring seat, and the left end of the adjusting screw rod extends out of the valve body and is threadedly connected with the locking nut at the left end of the valve body.
[0009] The oil holes that are communicated with the oil inlet and the oil outlet are respectively formed in the side wall of the valve body, and the valve body inner cavity, the oil inlet and the oil outlet form an oil liquid circulation pipeline after being communicated.
[0010] The superimposed safety valve, the pressure relief channel is communicated with the valve seat center through hole, and the other end of the pressure relief channel is communicated with the pressure relief port.
[0011] The superimposed safety valve, the valve core is provided with a through hole on the valve core, and the through hole is used for guiding oil to the left side of the valve body in the closed state of the valve core, so that the pressure difference of the liquid on both sides of the valve core is reduced.
[0012] The superimposed safety valve, the mounting seat is further provided with an oil discharge port communicated with the inner cavity of the valve body and used for discharging oil entering the inner cavity of the valve body on the left side of the valve core, and the oil discharge port is communicated with the inner cavity of the valve body through an oil discharge pipeline.
[0013] Due to the above technical scheme, the technical progress achieved by the utility model is as follows.
[0014] The utility model provides a kind of superimposed safety valve, by setting adjusting screw changes the position of spring seat in the inner cavity of valve body, to change the pre-tightening force of spring, can carry out pressure relief to the pipeline with different pressure demand, meet the pressure relief requirement of different pipeline, improve the operability of safety valve, and set mounting seat outside valve body assembly, protect entire valve body assembly, guarantee the service life of safety valve. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is specific structure schematic diagram of the utility model.
[0016] Wherein: 1. mounting seat, 2. valve body, 3. valve core, 4. spring seat, 5. spring, 6. valve seat, 7. oil inlet, 8. oil outlet, 9. pressure relief port, 10. pressure relief channel, 11. oil discharge port, 12. adjusting screw, 13. locking nut. DETAILED DESCRIPTION
[0017] The utility model will be further explained in detail in the following with the combination of drawing and specific embodiment.
[0018] Superimposed safety valve, as shown in Fig. Figure 1 It is specific structure schematic diagram of the utility model.
[0019] The left end outer diameter of valve core 3 is greater than the diameter of valve seat 6 center through hole, when valve core 3 right end is inserted into valve seat 6 center through hole and valve core 3 conical outer wall is contacted with the inner wall of through hole, valve seat center through hole is blocked, when valve core 3 is extracted from valve seat center through hole, valve seat center through hole is communicated with the inner cavity of valve body 2.
[0020] The valve core 3 left end is connected with spring 5, the other end of spring 5 is connected with spring seat 4 arranged in valve body 2, when valve core 3 left moves, it will compress spring 5, thereby opening valve seat 6 center through hole, facilitating pressure relief, after pressure relief is completed, under the reaction force of spring 5, it drives valve core 3 to rebound, and blocks valve seat 6 center through hole.
[0021] The left end of valve body 2 is threadedly connected with adjusting screw 12, the right end of adjusting screw 12 is connected with spring seat 4, the left end of adjusting screw 12 extends out of the left end of valve body 2 and is threadedly connected with locking nut 13 of the left end of valve body 2.
[0022] The position of spring seat 4 in the inner cavity of valve body is adjusted by adjusting screw 12, thereby the pre-tightening force of spring 5 is adjusted, so as to adjust the moving distance of valve core 3 according to pressure condition.
[0023] The inner seat 1 is further provided with pressure relief passage 10, oil inlet 7, oil outlet 8 and oil discharge port 11 communicated with the inner cavity of valve body 2.
[0024] The side wall of valve body 2 is respectively provided with oil hole communicated with oil inlet 7 and oil outlet 8, the inner cavity of valve body is communicated with oil inlet 7 and oil outlet 8 to form oil liquid flow pipeline, and normal oil liquid flow is carried out.
[0025] The pressure relief passage 10 is communicated with valve seat 6 center through hole, the other end of pressure relief passage 10 is communicated with pressure relief port 9, when the medium pressure in oil liquid flow pipeline is too high, it will push valve core 3 to left, thereby discharging part of medium to pressure relief passage 10 to carry out pressure relief, so as to keep the pressure value in oil liquid flow pipeline within safe range.
[0026] In order to ensure the pressure difference of valve core 3 two sides in the inner cavity of valve body, the through hole is arranged on valve core 3, so that oil liquid can also flow from the through hole to the inner cavity of valve body left of valve core 3 in closed state, which is beneficial to reduce the pressure difference of liquid of valve core 3 two sides.
[0027] The oil discharge port 11 is communicated with the inner cavity of valve body 2 through oil discharge pipeline, which can discharge the oil liquid in the inner cavity of valve body left of valve core 3.
[0028] In use, oil liquid enters the inner cavity of valve body from oil inlet 7 and is normally discharged from oil outlet 8, at the same time, part of oil liquid will enter the inner cavity of valve body left of valve core 3 through the through hole on valve core 3, which is used to reduce the pressure difference of valve core 3 two sides, and the excess oil liquid in the inner cavity of valve body left of valve core 3 flows to oil discharge port 11 through oil discharge pipeline and is discharged.
[0029] When the oil liquid pressure in the inner cavity of valve body is too high, it will push valve core 3 to left, so that the inner cavity of valve core is communicated with pressure relief passage 10 through valve seat center through hole to carry out pressure relief, after pressure relief is completed, spring 5 drives valve core 3 to reset, at this time, only normal oil liquid flow is carried out.
[0030] The utility model provides a kind of superimposed safety valve, by setting adjusting screw changes the position of spring seat in valve body inner cavity, to change the pre-tightening force of spring, can the pipeline with different pressure demand is relieved, meets the relief pressure requirement of different pipeline, improves the operability of safety valve, and sets up mounting seat outside valve body assembly, protects entire valve body assembly, guarantees the service life of safety valve.
Claims
1. A stacked relief valve characterized by: The utility model provides a valve body assembly, which comprises a mounting seat (1) and a valve body (2) installed in the mounting seat (1), wherein the valve body (2) is provided with a valve core (3) slidably installed in the valve body (2) and a valve seat (6) installed at the left end of the valve body (2), the valve core (3) is inserted and connected with the center through hole of the valve seat (6), the left end of the valve core (3) is connected with a spring (5) for driving the valve core (3) to rebound and reset, the other end of the spring (5) is connected with a spring seat (4) arranged in the valve body (2), the spring seat (4) is connected with an adjusting screw (12) for adjusting the position of the spring seat (4) in the inner cavity of the valve body (2) so as to change the pre-tightening force of the spring (5), the mounting seat (1) is further provided with a pressure relief channel (10) in communication with the inner cavity of the valve body (2), an oil inlet (7) and an oil outlet (8).
2. The stacked safety valve of claim 1, wherein: The right end of the valve core (3) is in a conical structure, and the outer diameter of the left end of the valve core (3) is larger than the diameter of the center through hole of the valve seat (6).
3. The stacked safety valve of claim 1, wherein: The adjusting screw (12) is threadedly connected with the left end of the valve body (2), the right end of the adjusting screw (12) is connected with the spring seat (4), and the left end of the adjusting screw (12) extends out of the valve body (2) and is threadedly connected with a locking nut (13) at the left end of the valve body (2).
4. The stacked safety valve of claim 1, wherein: The side wall of the valve body (2) is provided with oil holes in communication with the oil inlet (7) and the oil outlet (8), and the inner cavity of the valve body is in communication with the oil inlet (7) and the oil outlet (8) to form an oil flow pipeline.
5. The stacked safety valve of claim 1, wherein: The pressure relief channel (10) is in communication with the center through hole of the valve seat (6), and the other end of the pressure relief channel (10) is in communication with a pressure relief port (9).
6. The stacked safety valve of claim 1, wherein: The valve core (3) is provided with a through hole for allowing oil to flow into the inner cavity of the valve body on the left side of the valve core (3) in the closed state of the valve core (3) so as to reduce the pressure difference of the oil on both sides of the valve core (3).
7. The stacked safety valve of claim 1, wherein: The mounting seat (1) is further provided with an oil discharge port (11) in communication with the inner cavity of the valve body (2) and arranged to discharge the oil flowing into the inner cavity of the valve body on the left side of the valve core (3), and the inner cavity of the valve body (2) is in communication with the oil discharge port (11) through an oil discharge pipeline.