CN216555538U - Safety valve and hydraulic system - Google Patents
Safety valve and hydraulic system Download PDFInfo
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- CN216555538U CN216555538U CN202123392481.XU CN202123392481U CN216555538U CN 216555538 U CN216555538 U CN 216555538U CN 202123392481 U CN202123392481 U CN 202123392481U CN 216555538 U CN216555538 U CN 216555538U
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Abstract
The utility model discloses a safety valve and a hydraulic system, comprising: valve module, drive assembly, link assembly, the valve module includes: the piston body I is arranged in the valve cavity in a sliding manner, and one end of the piston rod I extends into the valve cavity at the side of the liquid outlet and is connected with the piston body I; the connecting rod assembly is connected with the first piston rod and is used for driving the first piston rod to move; the driving component is provided with a pressure end and a driving end, the pressure end is communicated with the valve cavity at the side of the liquid inlet, the driving end is in contact with or connected with the connecting rod component, and the driving end is used for driving the connecting rod component to move when the pressure in the pressure end, which is subjected to the valve cavity, is greater than a set value; a hydraulic system comprises the safety valve. The safety valve is simple in structure, convenient to manufacture, capable of reducing manufacturing cost to a great extent and capable of being used repeatedly.
Description
Technical Field
The application relates to the field of petroleum and natural gas equipment, in particular to a safety valve and a hydraulic system.
Background
The safety valve is an important part for ensuring the safe operation of the hydraulic system, when the discharge pressure of the pipeline exceeds the set blowout pressure value of the safety valve, the safety valve is automatically opened, the pressure is quickly released through a discharge pipeline, and the system pressure is ensured not to be subjected to accidents due to overhigh pressure. Therefore, the reliability and accuracy of the relief valve directly affect the safety of the hydraulic system.
At present, a hydraulic system safety valve equipped in an oil field is divided into a shear pin type safety valve and a spring reset type safety valve, the shear pin type safety valve needs to be replaced after each blowout, the consumption of the shear pin is large, and the release precision depends on the shear strength of the shear pin and the machining size of a valve body; although the spring return type safety valve can realize repeated blowout and return, the requirement on the spring is high, and the price is high.
SUMMERY OF THE UTILITY MODEL
The application aims at providing a safety valve and a hydraulic system, which are convenient to use repeatedly and reduce the manufacturing cost.
The embodiment of the application provides a relief valve, includes:
a valve assembly, the valve assembly comprising: the valve body is provided with a valve cavity, a liquid inlet and a liquid outlet which are communicated with the valve cavity, the piston body I is arranged in the valve cavity in a sliding mode and isolates the liquid inlet from the liquid outlet, and one end of the piston rod I is arranged in the valve cavity on the side of the liquid outlet and is connected with the piston body I;
the connecting rod assembly is connected with the first piston rod and is used for driving the first piston rod to move;
the driving assembly is provided with a pressure end and a driving end, the pressure end is communicated with the valve cavity on the side where the liquid inlet is located, the driving end is in contact with or connected with the connecting rod assembly, and the driving end is used for driving the connecting rod assembly to move when the pressure of the pressure end in the valve cavity is larger than a set value.
This kind of relief valve is by the inlet feed liquor in the use, and when inlet pressure was greater than the safe pressure of settlement, drive assembly moved, and wherein the drive end drives link assembly motion, and link assembly drives piston rod one and a piston body motion to switch on inlet and liquid outlet, spout by the liquid outlet and put the pressure release, with this assurance system pressure within the safe value of settlement.
On the basis of the technical scheme, the embodiment of the application can be further improved as follows:
further: the drive assembly includes: the hydraulic cylinder comprises a first oil cylinder, a second piston body, a third piston body, a second piston rod, a sequence valve and a pipeline, wherein one end of the first oil cylinder is communicated with the valve cavity at the side of the liquid inlet, the other end of the first oil cylinder is communicated with the second oil cylinder through the pipeline, the sequence valve is arranged in the pipeline, the second piston body is arranged in the first oil cylinder in a sliding mode, the third piston body is arranged in the second oil cylinder in a sliding mode, one end of the second piston rod extends into the second oil cylinder and is connected with the third piston body, the second piston rod is located at one side far away from the pipeline, and the other end of the second piston rod is in contact with or connected with the connecting rod assembly. The beneficial effect of this step: the sequence valve is convenient for adjusting the preset pressure when the safety valve acts.
Further: the connecting rod assembly includes: the piston rod I is fixedly hinged to one end of the piston rod II, the other end of the piston rod II is hinged to the other end of the piston rod II, the piston rod I is hinged to the piston rod II, the piston rod I is located on the same straight line, one end, far away from the piston body III, of the piston rod II is in contact with a rod body of the piston rod I or the piston rod II, and the piston rod II is used for driving the piston rod I and the piston rod II to rotate. The beneficial effect of this step: when the first connecting rod and the second connecting rod are collinear with the first piston rod, the three rods are located at dead point positions, the piston body cannot move, and when the pressure in the valve cavity is greater than the pressure set by the sequence valve, the second piston rod pushes the connecting rod assembly to enable the first connecting rod, the second connecting rod and the first piston rod to be unstable, so that the first piston body moves to open the liquid inlet and the liquid outlet, the pressure relief function is achieved, and the structure is simple and stable.
Further: the connecting rod assembly further includes: and the resetting handle is connected with the first connecting rod or the second connecting rod. The beneficial effect of this step: the first connecting rod, the second connecting rod and the first piston rod can be conveniently reset to the dead point position through the reset handle.
Further: the pipeline is provided with an oil filling port. The beneficial effect of this step: the oil filling port is convenient for supplementing hydraulic oil to the driving assembly according to the requirement.
Further: the valve assembly further comprises: the buffer cushion is connected in the valve cavity corresponding to the movement path of the piston body I. The beneficial effect of this step: the impact on the valve body in the motion process of the piston body is reduced through the buffer cushion.
The embodiment of the application also provides a hydraulic system, which comprises the safety valve.
Compared with the prior art, the utility model has the beneficial effects that:
1) the shear pin type safety valve overcomes the defect that the shear pin of the traditional shear pin type safety valve needs to be continuously replaced, can be repeatedly used, is convenient for pressure regulation, and can realize repeated open flow when the pressure is set once;
2) the defect that the spring reset type safety valve needs to be calibrated at regular intervals is overcome, and meanwhile, the defects of high requirements on rigidity and corrosion resistance of the spring are overcome;
3) different preset pressures can be set through adjusting the sequence valve according to different working conditions in the use process, the pressure adjusting range is wide, and various operation requirements are met.
Drawings
In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a first schematic structural diagram of the present invention;
fig. 2 is a second structural schematic diagram of the present invention.
1-a valve assembly, 101-a valve body, 102-a piston rod I, 103-a piston body I, 104-a valve cavity, 105-a liquid inlet, 106-a liquid outlet and 107-a buffer pad;
2-drive assembly, 201-cylinder one, 202-cylinder two, 203-piston body two, 204-piston body three, 205-piston rod two, 206-sequence valve, 207-pipeline, 208-oil filling port;
3-connecting rod assembly, 301-connecting rod I, 302-connecting rod II and 303-reset handle.
Detailed Description
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; the mechanical connection can be realized by selecting a proper connection mode in the prior art, such as welding, riveting, threaded connection, bonding, pin connection, key connection, elastic deformation connection, buckle connection, interference connection and injection molding; or an electrical connection, transmitting energy or signals by electricity; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
One embodiment in the present application provides a safety valve, as shown in fig. 1, comprising: valve module 1, drive assembly 2, link assembly 3, valve module 1 includes: the valve comprises a valve body 101, a first piston rod 102 and a first piston body 103, wherein the valve body 101 is provided with a valve cavity 104, a liquid inlet 105 and a liquid outlet 106 which are communicated with the valve cavity 104, the first piston body 103 is arranged in the valve cavity 104 in a sliding mode and separates the liquid inlet 105 from the liquid outlet 106, the first piston rod 102 is arranged on the valve body 101 in a sliding mode, and one end of the first piston rod 102 extends into the valve cavity 104 on the side of the liquid outlet 106 and is connected with the first piston body 103; the connecting rod assembly 3 is connected with the first piston rod 102, and the connecting rod assembly 3 is used for driving the first piston rod 102 to move so as to control the on-off of the liquid inlet 105 and the liquid outlet 106; the driving component 2 is provided with a pressure end and a driving end, the pressure end is communicated with the valve cavity 104 on the side where the liquid inlet 105 is located, the driving end is contacted with or connected with the connecting rod component 3, and the driving end is used for driving the connecting rod component 3 to move when the pressure in the pressure end received valve cavity 104 is larger than a set value.
As shown in fig. 1, the driving assembly 2 includes: the first oil cylinder 201, the second oil cylinder 202, the second piston body 203, the third piston body 204, the second piston rod 205, the sequence valve 206 and the pipeline 207, the first oil cylinder 201 is provided with a first cavity, the second oil cylinder 202 is provided with a second cavity, one end of the first cavity is communicated with the valve cavity 104 on the side of the liquid inlet 105, the other end of the first cavity is communicated with one end of the second cavity through the pipeline 207, the sequence valve 206 is arranged in the pipeline 207, the sequence valve 206 is used for adjusting the set pressure when the driving end acts, the second piston body 203 (namely, the pressed end) is arranged in the first cavity in a sliding manner, the piston body III 204 is arranged in the cavity II in a sliding mode, the piston rod II 205 (namely a driving end) is arranged on the oil cylinder II 202 in a sliding mode, one end of the piston rod II 205 extends into the oil cylinder II 202 to be connected with the piston body III 204, the piston rod II 205 is located on one side far away from the pipeline 207, and the other end of the piston rod II 205 is in contact with or connected with the connecting rod assembly 3.
As shown in fig. 1, the line 207 is provided with a filling port 208, through which filling port 208 hydraulic oil in the drive assembly 2 can be replenished as required.
As shown in fig. 1, the connecting-rod assembly 3 includes: one end of the first connecting rod 301 is fixedly hinged to the valve body 101, the other end of the first connecting rod 301 is hinged to one end of the second connecting rod 302, the other end of the second connecting rod 302 is hinged to the end portion, extending out of the valve body 101, of the first piston rod 102, when the safety valve does not act, the first connecting rod 301, the second connecting rod 302 and the first piston rod 102 are located on the same straight line, one end, far away from the third piston body 204, of the second piston rod 205 is in contact with the surface of the first connecting rod 301 or the second connecting rod 302, and the second piston rod 205 is used for driving the first connecting rod 301 and the second connecting rod 302 to rotate.
As shown in fig. 1, the connecting-rod assembly 3 further includes: the reset handle 303 and the reset handle 303 are connected to the first connecting rod 301 or the second connecting rod 302, in this embodiment, the first connecting rod 301 and the second connecting rod 302 are driven to move to the initial position (i.e., the position where the first connecting rod 301, the second connecting rod 302 and the first piston rod 102 are collinear) by the reset handle 303 after the first connecting rod 301 and the second connecting rod 302 move.
As shown in fig. 1, the valve assembly 1 further includes: the cushion pad 107, the cushion pad 107 is connected in the valve cavity 104 corresponding to the movement path of the first piston body 103, and the impact of the first piston body 103 on the valve body 101 is relieved when the first piston body 103 moves through the cushion pad 107.
The working principle of the safety valve is as follows: as shown in fig. 1 and 2, when the pressure in the valve cavity 104 does not exceed the safety pressure set by the sequence valve 206, the first piston body 103 is located between the first liquid inlet 105 and the second liquid outlet 106 to isolate the first liquid inlet 105 from the second liquid outlet 106, when the pressure exceeds the safety pressure, the second piston body 203 acts, meanwhile, hydraulic oil acts on the third piston body 204 through the sequence valve 206, the third piston body 204 drives the second piston rod 205 to extend out of the second oil cylinder 202, the second piston rod 205 pushes the first connecting rod 301 and the second connecting rod 302 to rotate, the connecting rod assembly 3 is unstable, the first piston rod 102 is driven to move upwards until the first liquid inlet 105 is communicated with the second liquid outlet 106, and the liquid in the valve cavity 104 is ejected and decompressed through the second liquid outlet 106; after the pressure relief is finished, the first connecting rod 301 and the second connecting rod 302 are rotated and reset by rotating the reset handle 303, when the first connecting rod 301 and the second connecting rod 302 are collinear, the first piston rod 102 and the connecting rod assembly 3 are collinear, namely, the dead point position is reached, and the first piston body 103 simultaneously isolates the liquid inlet 105 from the liquid outlet 106, so that the one-time pressure relief operation is finished. The safety valve in the embodiment of the application is compared with the safety valve in the prior art, and is simple in structure and convenient to manufacture, the manufacturing cost of the safety valve can be greatly reduced, and the safety valve can be repeatedly used.
Another embodiment in the present application provides a hydraulic system that employs the safety valve of the above-described embodiment.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (7)
1. A safety valve, comprising:
a valve assembly, the valve assembly comprising: the valve body is provided with a valve cavity, a liquid inlet and a liquid outlet which are communicated with the valve cavity, the piston body I is arranged in the valve cavity in a sliding mode and isolates the liquid inlet from the liquid outlet, and one end of the piston rod I is arranged in the valve cavity on the side of the liquid outlet and is connected with the piston body I;
the connecting rod assembly is connected with the first piston rod and is used for driving the first piston rod to move;
the driving assembly is provided with a pressure end and a driving end, the pressure end is communicated with the valve cavity on the side where the liquid inlet is located, the driving end is in contact with or connected with the connecting rod assembly, and the driving end is used for driving the connecting rod assembly to move when the pressure of the pressure end in the valve cavity is larger than a set value.
2. The safety valve of claim 1, wherein the drive assembly comprises: the hydraulic cylinder comprises a first oil cylinder, a second piston body, a third piston body, a second piston rod, a sequence valve and a pipeline, wherein one end of the first oil cylinder is communicated with the valve cavity at the side of the liquid inlet, the other end of the first oil cylinder is communicated with the second oil cylinder through the pipeline, the sequence valve is arranged in the pipeline, the second piston body is arranged in the first oil cylinder in a sliding mode, the third piston body is arranged in the second oil cylinder in a sliding mode, one end of the second piston rod extends into the second oil cylinder and is connected with the third piston body, the second piston rod is located at one side far away from the pipeline, and the other end of the second piston rod is in contact with or connected with the connecting rod assembly.
3. The safety valve of claim 2, wherein the linkage assembly comprises: the piston rod I is fixedly hinged to one end of the piston rod II, the other end of the piston rod II is hinged to the other end of the piston rod II, the piston rod I is hinged to the piston rod II, the piston rod I is located on the same straight line, one end, far away from the piston body III, of the piston rod II is in contact with a rod body of the piston rod I or the piston rod II, and the piston rod II is used for driving the piston rod I and the piston rod II to rotate.
4. The safety valve of claim 3, wherein the linkage assembly further comprises: and the resetting handle is connected with the first connecting rod or the second connecting rod.
5. The safety valve according to claim 2, characterized in that said line is provided with an oil filling orifice.
6. The safety valve of claim 1, wherein the valve assembly further comprises: the buffer cushion is connected in the valve cavity corresponding to the movement path of the piston body I.
7. A hydraulic system comprising a safety valve according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123392481.XU CN216555538U (en) | 2021-12-30 | 2021-12-30 | Safety valve and hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123392481.XU CN216555538U (en) | 2021-12-30 | 2021-12-30 | Safety valve and hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216555538U true CN216555538U (en) | 2022-05-17 |
Family
ID=81558536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123392481.XU Active CN216555538U (en) | 2021-12-30 | 2021-12-30 | Safety valve and hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216555538U (en) |
-
2021
- 2021-12-30 CN CN202123392481.XU patent/CN216555538U/en active Active
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