Safety valve

Abstract

The safety valve comprises a valve body, the valve body is provided with an operation cavity and a liquid inlet channel communicated with the operation cavity, a sealing fillet is arranged at the outflow end of the liquid inlet channel, and the sealing fillet is arranged on the periphery of the liquid inlet channel in a surrounding mode; the valve rod is movably arranged in the operation cavity, a curved surface mounting groove is formed in the side, facing the sealing fillet, of the valve rod, and the curved surface mounting groove and the sealing fillet are oppositely arranged; the valve bead is movably arranged in the operation cavity, one end of the valve bead is contained in the curved surface mounting groove, and the other end of the valve bead is used for abutting against the sealing fillet; and the adjusting assembly is arranged outside the valve rod in a sleeving mode, at least part of the adjusting assembly stretches into the operation cavity, and the adjusting assembly is used for adjusting the position of the valve rod so that the valve bead can abut against or loosen the sealing fillet. According to the technical scheme, the technical problem that after a traditional safety valve is used for a long time, the internal sealing performance becomes poor is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of pressure valves, and in particular to a safety valve. Background Art

[0002] In oilfield fracturing / cementing operations, various high-pressure pipelines are required to connect equipment and wellheads to achieve the injection and discharge of high-pressure fluids. During field operations, in order to ensure the personal safety of operators, safety valves are generally installed in high-pressure pipelines to achieve load and pressure relief operations between fracturing equipment / cementing equipment and high-pressure pipelines, avoid safety accidents such as explosions caused by overpressure, and improve field operation safety.

[0003] In the related art, the spring is generally compressed by adjusting the bolt, and then the spring provides a pre-tightening pressure to the valve seat to make the valve disc close to the valve seat, so as to close the safety valve and prevent the working medium from continuing to flow through the safety valve. On the one hand, the working medium contains substances such as acid and sand-carrying fracturing fluid, which will corrode the safety valve and affect the sealing performance of the safety valve if they stay in the safety valve for a long time; on the other hand, after the safety valve is opened and closed many times, the elastic force of the spring will be affected, so that the valve disc of the safety valve and the valve seat are not tightly fitted, resulting in a reduction in the sealing pressure of the safety valve and a poor sealing effect. Utility Model Content

[0004] The present application provides a safety valve to solve the technical problem that the internal sealing performance of a traditional safety valve deteriorates after long-term use.

[0005] To this end, an embodiment of the present application provides a safety valve, which includes: a valve body, having a working chamber and a liquid inlet channel connected to the working chamber, a sealing fillet being arranged on the outflow end of the liquid inlet channel, and the sealing fillet being arranged around the periphery of the liquid inlet channel; a valve stem, movably arranged in the working chamber, a curved mounting groove being arranged on the side of the valve stem facing the sealing fillet, and the curved mounting groove and the sealing fillet being arranged opposite to each other; a valve ball, movably arranged in the working chamber, one end of the valve ball being accommodated in the curved mounting groove, and the other end being used to abut against the sealing fillet; and an adjusting assembly, sleeved on the outside of the valve stem, at least a portion of the adjusting assembly extending into the working chamber, for adjusting the position of the valve stem so that the valve ball can tighten or loosen the sealing fillet.

[0006] In a possible implementation, it further includes a valve seat and a first sealing member, the valve seat is provided with a seat hole connected to the liquid inlet channel, the valve seat is sealed in the working chamber through the first sealing member, and the sealing fillet is provided on the side of the valve seat facing the valve stem.

[0007] In a possible implementation, the first sealing member includes a sealing body and a retaining ring arranged outside the sealing body, the sealing body extends out of the retaining ring in the direction from the valve stem to the valve ball, and the connecting surface between the retaining ring and the sealing body is inclined.

[0008] In a possible embodiment, the adjusting assembly includes an elastic seat, an elastic member and an adjusting member, at least a portion of the elastic seat extends into the working chamber and is connected to the valve body, the elastic seat is provided with an elastic hole extending through the elastic seat along its axial direction, and the valve stem is movably arranged in the elastic hole; the elastic member is sleeved on the outer side of the valve stem and abuts against the head of the valve stem, and the adjusting member is sleeved on the end of the valve stem and abuts against the side of the elastic member away from the valve ball.

[0009] In a possible implementation manner, the regulating assembly further includes a second sealing member, and the second sealing member is disposed between the valve stem and the elastic seat; and / or,

[0010] The regulating assembly also includes a third sealing component, which is arranged between the elastic seat and the valve body.

[0011] In a possible implementation manner, the adjustment assembly further includes a first locking member, which is sleeved on the outside of the adjustment member and is used to lock the adjustment member.

[0012] In a possible implementation manner, the adjusting component further includes a protective member, which is connected to a side of the elastic seat away from the valve ball, and the first locking member and the adjusting member are both located inside the protective member.

[0013] In a possible implementation manner, a second locking member is further included, and the second locking member is inserted into the valve body and pressed against the elastic seat.

[0014] In a possible implementation, it further includes a valve sleeve, which is arranged in the working chamber corresponding to the liquid inlet channel, and the valve sleeve is provided with a sleeve hole extending along its axial direction, the valve ball is movably arranged in the sleeve hole, and at least a part of the valve stem is inserted in the sleeve hole.

[0015] In a possible implementation manner, a liquid outlet passage communicating with the working chamber is provided on the valve body, and a pressure relief hole is provided on the valve sleeve. The pressure relief hole extends radially along the valve sleeve and communicates with the sleeve hole.

[0016] According to the safety valve provided in the embodiment of the present application, it includes: a valve body, having a working chamber and a liquid inlet channel connected to the working chamber, a sealing fillet is arranged on the outflow end of the liquid inlet channel, and the sealing fillet is arranged around the periphery of the liquid inlet channel; a valve stem, movably arranged in the working chamber, a curved surface mounting groove is arranged on the side of the valve stem facing the sealing fillet, and the curved surface mounting groove is arranged opposite to the sealing fillet; a valve ball, movably arranged in the working chamber, one end of the valve ball is accommodated in the curved surface mounting groove, and the other end is used to abut on the sealing fillet; and an adjusting assembly, which is sleeved on the outside of the valve stem, at least part of the adjusting assembly extends into the working chamber, and is used to adjust the position of the valve stem so that the valve ball can tighten or loosen the sealing fillet. The technical solution of the present application is provided with a sealing fillet at the outflow end of the inlet channel of the valve body, and at the same time, a curved surface installation groove is provided on the side of the valve stem facing the sealing fillet, so that the valve ball is arranged between the curved surface installation groove and the sealing fillet. In this way, the contact area between the valve ball and the valve stem can be increased through the curved surface installation groove, thereby increasing the connection stability and sealing performance between the valve ball and the valve stem; and the metal hard seal between the valve ball and the valve body can be realized through the hard sealing fillet, so as to avoid the valve ball from damaging the safety valve seal when the ultra-high pressure fluid is relieved at the moment of opening, thereby enhancing the sealing performance of the safety valve. In addition, the sealing between the inlet channel of the valve body and the valve ball is realized through the sealing fillet, and the arc surface of the sealing fillet can be used to guide the working medium out of the safety valve to the maximum extent, so as to avoid the working medium from staying in the safety valve for a long time and corroding the internal structure of the safety valve, thereby improving the sealing performance of the safety valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments that conform to the present application, and are used together with the specification to explain the principles of the present application. In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can also be obtained based on these drawings without paying creative labor. One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute a proportional limitation.

[0018] Figure 1 An axial cross-sectional view of a safety valve provided in an embodiment of the present application;

[0019] Figure 2 A partial three-dimensional diagram of a valve ball and a valve seat of a safety valve provided in an embodiment of the present application;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 An axial cross-sectional view of a first sealing member of a safety valve provided in an embodiment of the present application;

[0022] Figure 5 A schematic diagram of the three-dimensional structure of the valve sleeve of the safety valve provided in an embodiment of the present application.

[0023] Description of reference numerals:

[0024] 100, valve body; 101, liquid inlet channel; 110, sealing fillet; 102, liquid outlet channel;

[0025] 200, valve stem; 201, curved surface mounting groove;

[0026] 300, valve ball;

[0027] 400, adjustment component; 410, elastic seat; 420, elastic member; 430, adjustment member; 440, second sealing member; 450, third sealing member; 460, first locking member; 470, protection member;

[0028] 500, valve seat; 501, seat hole;

[0029] 600, first sealing member; 610, sealing body; 620, retaining ring;

[0030] 700, second locking member;

[0031] 800, valve sleeve; 801, sleeve hole; 802, pressure relief hole. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the various specific processes and examples of materials provided by the present application, but those of ordinary skill in the art can appreciate the applicability of other processes and / or the use of other materials.

[0034] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0035] See also Figures 1 to 3 The embodiment of the present application provides a safety valve, which includes: a valve body 100, having a working chamber and a liquid inlet channel 101 connected to the working chamber, a sealing fillet 110 is arranged on the outflow end of the liquid inlet channel 101, and the sealing fillet 110 is arranged around the periphery of the liquid inlet channel 101; a valve stem 200, which is movably arranged in the working chamber, and a curved surface mounting groove 201 is arranged on the side of the valve stem 200 facing the sealing fillet 110, and the curved surface mounting groove 201 is arranged opposite to the sealing fillet 110; a valve ball 300, which is movably arranged in the working chamber, one end of the valve ball 300 is accommodated in the curved surface mounting groove 201, and the other end is used to abut on the sealing fillet 110; and an adjusting component 400, which is sleeved on the outside of the valve stem 200, and at least a part of the adjusting component 400 extends into the working chamber, and is used to adjust the position of the valve stem 200 so that the valve ball 300 abuts against or loosens the sealing fillet 110.

[0036] In this embodiment, a sealing fillet 110 is provided on the outflow end of the liquid inlet channel 101 of the valve body 100. At the same time, a curved surface mounting groove 201 is provided on the side of the valve stem 200 facing the sealing fillet 110, so that the valve ball 300 is arranged between the curved surface mounting groove 201 and the sealing fillet 110. In this way, the contact area between the valve ball 300 and the valve stem 200 can be increased through the curved surface mounting groove 201, thereby increasing the connection stability and sealing performance between the valve ball 300 and the valve stem 200; and the hard sealing fillet 110 can be used to achieve a metal hard seal between the valve ball 300 and the valve body 100, thereby preventing the valve ball 300 from damaging the safety valve seal when the ultra-high pressure fluid is relieved at the moment of opening, thereby enhancing the sealing performance of the safety valve. In addition, the sealing between the liquid inlet channel 101 of the valve body 100 and the valve ball 300 is achieved by the sealing fillet 110. The arc surface of the sealing fillet 110 can be used to guide the working medium out of the safety valve to the maximum extent, thereby preventing the working medium from staying in the safety valve for a long time and corroding the internal structure of the safety valve, thereby improving the sealing performance of the safety valve.

[0037] Specifically, the safety valve is configured as a combined component including at least a valve body 100, a valve stem 200, a valve ball 300 and an adjusting assembly 400. The top of the valve body 100 is provided with an open working chamber, and the liquid inlet channel 101 is connected to the bottom of the working chamber. The radial dimension of the liquid inlet channel 101 is smaller than the radial dimension of the open end of the working chamber, so as to realize the rapid pressure relief and discharge of the working medium in the liquid inlet channel 101, and quickly reduce the internal pressure of the high-pressure pipeline and the equipment connected thereto, so as to avoid safety accidents such as explosions; the liquid inlet channel 101 is connected to the high-pressure pipeline, and can introduce the working medium in the high-pressure pipeline under high pressure or overpressure into the valve body 100. in the working chamber; in addition, the outflow end of the liquid inlet channel 101 is provided with a sealing fillet 110 with an arc-shaped outer fillet structure. On the one hand, the arc-shaped outer fillet can smoothly and quickly introduce the working medium in the liquid inlet channel 101 into the working chamber and then discharge it, so as to avoid the working medium staying in the safety valve for a long time and causing corrosion to the internal components of the safety valve, thereby extending the service life and sealing performance of the safety valve. On the other hand, the arc-shaped outer fillet can directly abut against the outer wall of the valve ball 300 to form a metal hard seal with the valve ball 300, so as to prevent the valve ball 300 from damaging the safety valve seal when the ultra-high pressure fluid is relieved at the moment of opening, thereby enhancing the sealing performance of the safety valve. The valve stem 200 can be a metal rod including a head and a rod, the head and the rod are axially connected, and the radial size of the head is larger than the radial size of the rod, so as to form a limit at the connection between the head and the rod; a curved surface mounting groove 201 is provided on the side of the head away from the rod, and the size of the curved surface mounting groove 201 can be adapted to the outer size of the valve ball 300 so as to accommodate at least part of the valve ball 300, increase the contact area between the valve ball 300 and the valve stem 200, thereby increasing the friction between the valve stem 200 and the valve ball 300, and increasing the connection stability between the valve stem 200 and the valve ball 300. At the same time, the curved surface design can also enable the valve ball 300 to automatically align with the curved surface mounting groove 201 during the falling process, prevent the valve ball 300 from getting stuck, and ensure that a good seal is maintained between the valve stem 200 and the valve ball 300. The valve ball 300 can be a spherical corrosion-resistant alloy part, which is movably configured between the curved surface mounting groove 201 and the sealing fillet 110. The valve stem 200 can be abutted by the adjusting component 400, so that the curved surface mounting groove 201 of the valve stem 200 presses the valve ball 300 and the valve ball 300 presses against the sealing fillet 110, thereby closing the safety valve. At this time, the working medium in the liquid inlet channel 101 cannot enter the working chamber. The valve stem 200 can also be loosened by the adjusting component 400, so that the curved surface mounting groove 201 of the valve stem 200 is away from the valve ball 300 and the valve ball 300 is away from the sealing fillet 110, thereby opening the safety valve. At this time, the working medium in the liquid inlet channel 101 can enter the working chamber through the gap between the sealing fillet 110 and the valve ball 300 and be discharged, thereby unloading the high-pressure pipeline and improving the operating safety of high-pressure equipment such as fracturing equipment / cementing equipment.

[0038] It should be explained that when the safety valve is in the closed state, at least part of the valve ball 300 can extend into the liquid inlet channel 101 to improve the adaptability of the valve ball 300 to liquid inlet channels 101 of different sizes and ensure the sealing performance between the valve ball 300 and the sealing fillet 110. However, the maximum radial dimension of the liquid inlet channel 101 cannot exceed the diameter of the valve ball 300 to prevent the valve ball 300 from directly entering the liquid inlet channel 101 and blocking the liquid inlet channel 101.

[0039] See also Figure 1 and Figure 5 In a possible implementation, it also includes a valve seat 500 and a first sealing member 600. The valve seat 500 is provided with a seat hole 501 connected to the liquid inlet channel 101. The valve seat 500 is sealed in the working chamber through the first sealing member 600. The sealing fillet 110 is provided on the side of the valve seat 500 facing the valve stem 200.

[0040] In this embodiment, the specific configuration of the safety valve is further optimized. Specifically, the safety valve is configured as a composite component including at least a valve body 100, a valve stem 200, a valve ball 300, an adjustment assembly 400, a valve seat 500 and a first sealing member 600. The valve seat 500 may be a cylindrical structure, on which a through seat hole 501 is provided. The radial dimension of the seat hole 501 may be less than or equal to the radial dimension of the liquid inlet channel 101, so as to ensure that the working medium in the liquid inlet channel 101 enters the working chamber through the seat hole 501. The first sealing member 600 has a certain flexibility. During specific operation, the flexibility of the first sealing member 600 can be used to enhance the sealing performance between the valve seat 500 and the valve body 100. For example, the first sealing member 600 may be a rubber ring, which is arranged between the valve seat 500 and the valve body 100 facing the liquid inlet channel 101.

[0041] In one example, a sealing groove for installing the first sealing member 600 is provided on the side of the valve seat 500 facing the liquid inlet channel 101. The sealing groove may be an annular structure, and at least a portion of the first sealing member 600 is inserted into the sealing groove. Of course, in other embodiments, the first sealing member 600 may be configured on the valve seat 500 by means of adhesive or the like, and the specific connection method between the first sealing member 600 and the valve seat 500 is not limited here.

[0042] See also Figure 1 and Figure 5 In a possible implementation, the first sealing member 600 includes a sealing body 610 and a retaining ring 620 disposed outside the sealing body 610. In the direction from the valve stem 200 to the valve ball 300, the sealing body 610 extends out of the retaining ring 620, and the connecting surface between the retaining ring 620 and the sealing body 610 is inclined.

[0043] In this embodiment, the specific configuration of the first sealing member 600 is optimized. Specifically, the first sealing member 600 is configured as a combined component including at least a sealing body 610 and a retaining ring 620. The sealing body 610 may be a rubber ring, and the side thereof facing the valve seat 500 is a flat surface so as to fit on the valve seat 500, reduce the connection gap, and enhance the sealing performance with the valve seat 500; the side thereof facing the valve body 100 may be a curved surface so that when the sealing body 610 abuts against the valve body 100, the middle part of the sealing body 610 abuts against the valve body 100 first, and then is squeezed toward the two sides of the sealing body 610, so as to enhance the sealing stability between the sealing body 610 and the valve body 100. The retaining ring 620 can be a rubber ring, which is arranged on the outer side of the sealing body 610, and is used to cooperate with the sealing body 610 to further enhance the sealing connection between the first sealing member 600 and the valve body 100; the side of the retaining ring 620 facing the valve body 100 is a plane, and the side facing the valve body 100 is lower than the side of the sealing body 610 facing the valve body 100, so as to form an extrusion space above the retaining ring 620; the side of the retaining ring 620 facing the valve seat 500 is a plane, which is flush with the sealing body 610, so as to fit on the valve seat 500, reduce the connection gap, and enhance the sealing between the valve seat 500. In addition, the connecting surface between the retaining ring 620 and the sealing body 610 is an inclined surface, which is beneficial to decomposing the pressure exerted on the sealing body 610 toward the valve body 100 to the retaining ring 620, so that part of the retaining ring 620 continues to move forward to the extrusion space and deforms. At this time, the sealing body 610 moves laterally to the extrusion space under the action of the pressure, thereby enhancing the sealing performance between the first sealing component 600 and the valve body 100 side.

[0044] See also Figure 1 In a possible implementation, the adjusting assembly 400 includes an elastic seat 410, an elastic member 420 and an adjusting member 430. At least part of the elastic seat 410 extends into the working chamber and is connected to the valve body 100. The elastic seat 410 is provided with an elastic hole extending through the elastic seat 410 along its axial direction, and the valve stem 200 is movably arranged in the elastic hole; the elastic member 420 is sleeved on the outer side of the valve stem 200 and abuts against the head of the valve stem 200, and the adjusting member 430 is sleeved on the end of the valve stem 200 and abuts against the side of the elastic member 420 away from the valve ball 300.

[0045] In this embodiment, the specific configuration of the adjustment component 400 is optimized. Specifically, the adjustment component 400 is configured as a composite component including at least an elastic seat 410, an elastic member 420 and an adjustment member 430. The elastic seat 410 can be a columnar metal member, and the elastic hole provided thereon penetrates the elastic seat 410 for the insertion of the elastic member 420, the adjustment member 430 and the valve stem 200, etc.; the open end of the working chamber of the valve body 100 is provided with an internal thread, and the outer wall of the elastic seat 410 facing the valve body 100 is provided with an external thread, which is adapted to the internal thread to realize the threaded connection between the elastic seat 410 and the valve body 100, thereby increasing the connection tightness between the elastic seat 410 and the valve body 100 and the sealing of the connection. The elastic member 420 can be a butterfly spring with large stiffness, small deformation and strong buffering and vibration absorption ability. It is embedded in the elastic hole and sleeved on the outside of the valve stem 200. The front end of the elastic member 420 abuts against the valve head of the valve stem 200 to provide an elastic pre-tightening force to the valve stem 200. Under the action of the elastic pre-tightening force, the valve stem 200 can be pressed against the valve ball 300 and the sealing fillet 110 to achieve the closing of the safety valve. The adjusting member 430 may be an adjusting screw, and a delayed axially extending movable hole is provided on the front side thereof. The movable hole does not penetrate the adjusting member 430. When the adjusting member 430 is inserted into the elastic seat 410, the front end periphery of the adjusting member 430 abuts against the periphery of the elastic member 420, and the rod portion of the valve stem 200 is embedded in the movable hole. The outer wall of the adjusting member 430 may be connected to the elastic seat 410 by a structure such as a thread. In this way, the centering of the adjusting member 430 and the valve stem 200 during the adjustment process can be ensured, so that the elastic member 420 is subjected to a uniform pressing force, thereby ensuring the uniformity of the elastic preload force.

[0046] In one example, the elastic member 420 can be combined by a plurality of disc springs in a manner of matching or overlapping to increase the elastic force of the elastic member 420, so that the safety valve can act in an ultra-high pressure working environment, such as 140 MPa and above. Of course, in other embodiments, the elastic member 420 can also be formed by combining a plurality of disc springs of different thicknesses and different numbers of disc springs to meet the pressure relief requirements of different pressure sections.

[0047] In one example, the outer surface of the adjusting member 430 may be coated to reduce the friction between the adjusting member 430 and the elastic seat 410 and prevent the adjusting member 430 from biting with the elastic seat 410 under a large load.

[0048] See also Figure 1 In a possible implementation manner, the adjustment assembly 400 further includes a second sealing member 440 , and the second sealing member 440 is disposed between the valve stem 200 and the elastic seat 410 .

[0049] In this embodiment, the specific configuration of the adjustment assembly 400 is further optimized. Specifically, the adjustment assembly 400 is configured as a composite component including at least an elastic seat 410, an elastic member 420, an adjustment member 430 and a second sealing member 440. The second sealing member 440 may be a lip seal ring, which may be connected to the valve stem 200 through a mounting groove and abut against the inner wall of the elastic seat 410 after the valve stem 200 is assembled to the elastic seat 410, so as to improve the sealing performance between the valve stem 200 and the elastic seat 410.

[0050] In one example, a flat mouth structure is provided on the elastic seat 410 to facilitate subsequent disassembly and assembly. A breathing hole is provided on the elastic seat 410, and the breathing hole can be provided at the flat mouth structure, which can extend along the radial direction of the elastic seat 410 and communicate with the elastic hole, so as to avoid the situation of holding air when the valve stem 200 is installed in the elastic hole after the second sealing member 440 is installed on the valve stem 200, and facilitate the assembly of the safety valve.

[0051] See also Figure 1 In a possible implementation manner, the regulating assembly 400 further includes a third sealing member 450 , and the third sealing member 450 is disposed between the elastic seat 410 and the valve body 100 .

[0052] In this embodiment, the specific configuration of the adjustment component 400 is further optimized. Specifically, the adjustment component 400 is configured as a combined component including at least an elastic seat 410, an elastic member 420, an adjustment member 430 and a third sealing member 450. The third sealing member 450 can be a combination of a sealing retainer ring 620 and an O-ring, which can be connected to the elastic seat 410 through a mounting groove and abut against the inner wall of the valve body 100 after the elastic seat 410 is assembled to the valve body 100, so as to improve the sealing performance between the elastic seat 410 and the valve body 100.

[0053] In a possible implementation, the adjustment assembly 400 further includes a first locking member 460 . The first locking member 460 is sleeved on the outside of the adjustment member 430 and is used to lock the adjustment member 430 .

[0054] In this embodiment, the specific configuration of the adjustment component 400 is further optimized. Specifically, the adjustment component 400 is configured as a composite component including at least an elastic seat 410, an elastic member 420, an adjustment member 430 and a first locking member 460. The first locking member 460 can be a locking nut, which is provided with a locking hole extending through the axial direction thereof, and the locking hole is provided with an internal thread. The outer wall of the adjustment member 430 is provided with an external thread matching the internal thread, and the external thread is threadedly connected with the internal thread to achieve the connection and fastening of the first locking member 460 and the adjustment member 430, further enhance the stability of the adjustment member 430, and improve the structural stability and reliability of the safety valve. When the first locking member 460 is locked, its front end abuts against the elastic seat 410 to prevent the first locking member 460 from being excessively screwed into the adjustment member 430.

[0055] See also Figure 1 In a possible implementation, the adjustment assembly 400 further includes a protective member 470 , which is connected to a side of the elastic seat 410 away from the valve ball 300 , and the first locking member 460 and the adjustment member 430 are both located inside the protective member 470 .

[0056] In this embodiment, the specific configuration of the adjustment assembly 400 is further optimized. Specifically, the adjustment assembly 400 is configured as a composite component including at least an elastic seat 410, an elastic member 420, an adjustment member 430, a first locking member 460 and a first protective member 470. The first protective member 470 may be a protective cover, which is provided at the suspended end of the elastic seat 410 and is used to protect the internal components such as the adjustment member 430, the first locking member 460 and the end of the valve stem 200, so as to ensure the operational stability of the safety valve.

[0057] In one example, the protective member 470 and the adjusting member 430 are provided with elongated holes, which can be used in conjunction with a wire seal to fix the adjusted safety valve and prevent the adjusting member 430 from being adjusted at will.

[0058] See also Figure 1 In a possible implementation manner, a second locking member 700 is further included. The second locking member 700 is plugged into the valve body 100 and pressed against the elastic seat 410 .

[0059] In this embodiment, the specific configuration of the safety valve is further optimized. Specifically, the safety valve is configured as a composite component including at least a valve body 100, a valve stem 200, a valve ball 300, an adjustment assembly 400 and a second locking member 700. The second locking member 700 can be a top screw, which can be assembled between the valve body 100 and the elastic seat 410 through a laterally arranged connection hole, and is used to prevent the connection between the elastic seat 410 and the valve body 100 from loosening due to the vibration of the equipment when the safety valve works for a long time, and further improve the connection tightness and reliability between the valve body 100 and the elastic seat 410. The front end of the top screw is inlaid with copper alloy, and the rear end is alloy steel. In this way, when the front end of the top screw is pressed against the elastic seat 410, it can protect the external thread on the elastic seat 410 and avoid damaging the external thread teeth on the spring seat; it can also enhance the connection and tightness with the valve body 100 to prevent loosening.

[0060] See also Figure 1 and Figure 5 In a possible implementation, it further includes a valve sleeve 800, which is arranged in the working chamber corresponding to the liquid inlet channel 101, and the valve sleeve 800 is provided with a sleeve hole 801 extending along its axial direction, the valve ball 300 is movably arranged in the sleeve hole 801, and at least a part of the valve stem 200 is inserted in the sleeve hole 801.

[0061] In this embodiment, the specific configuration of the safety valve is further optimized. Specifically, the safety valve is configured as a composite component including at least a valve body 100, a valve stem 200, a valve ball 300, an adjustment assembly 400 and a valve sleeve 800. The valve sleeve 800 can be a cylindrical structure, and a sleeve hole 801 is arranged on it to penetrate the valve sleeve 800 along its axial direction, so that the valve ball 300 can reciprocate in the sleeve hole 801 to achieve the closing and opening of the safety valve; at the same time, at least part of the valve stem 200 can be inserted into the sleeve hole 801, thereby enhancing the connection tightness between the valve stem 200 and the valve sleeve 800 and improving the compactness and stability of the overall structure. In addition, at least part of the valve stem 200 extends into the sleeve hole 801, which can at least effectively reduce the space occupied by the safety valve in its axial direction, improve the compactness of the structure and the rationality of the layout of the safety valve, and facilitate industrial production.

[0062] See also Figure 5 In a possible implementation, a liquid outlet channel 102 communicating with the working chamber is provided on the valve body 100 , and a pressure relief hole 802 is provided on the valve sleeve 800 . The pressure relief hole 802 extends radially along the valve sleeve 800 and communicates with the sleeve hole 801 .

[0063] In this embodiment, the specific configuration of the valve sleeve 800 is optimized. Specifically, a pressure relief hole 802 connected to the liquid outlet channel 102 is provided on the valve sleeve 800, and the pressure relief hole 802 is provided on the side wall of the valve sleeve 800, so that the working medium entering the working chamber through the liquid inlet channel 101 can be discharged from the safety valve through the pressure relief hole 802 and the liquid outlet channel 102, thereby achieving pressure relief of the high-pressure equipment; a plurality of pressure relief holes 802 can be provided, for example, four, and the plurality of pressure relief holes 802 are arranged at intervals along the axis of the valve sleeve 800 in its circumferential direction, so as to at least increase the number of discharge channels, thereby shortening the pressure relief time and improving the pressure relief efficiency.

[0064] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0065] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0066] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A safety valve, characterized in that: include: A valve body, comprising an operating chamber and a liquid inlet channel communicating with the operating chamber, wherein a sealing fillet is arranged on the outflow end of the liquid inlet channel, and the sealing fillet is arranged around the periphery of the liquid inlet channel; A valve stem, movably arranged in the working chamber, a curved surface mounting groove is provided on a side of the valve stem facing the sealing fillet, and the curved surface mounting groove is arranged opposite to the sealing fillet; A valve ball, movably disposed in the working chamber, one end of the valve ball being received in the curved surface mounting groove, and the other end being used to abut against the sealing fillet; as well as An adjusting component is sleeved outside the valve stem, and at least a part of the adjusting component extends into the working cavity, and is used to adjust the position of the valve stem so that the valve ball presses against or loosens the sealing fillet.

2. The safety valve according to claim 1, characterized in that: It also includes a valve seat and a first sealing member, wherein the valve seat is provided with a seat hole connected to the liquid inlet channel, the valve seat is sealed in the working chamber through the first sealing member, and the sealing fillet is provided on the side of the valve seat facing the valve stem.

3. The safety valve according to claim 2, characterized in that: The first sealing member includes a sealing body and a retaining ring arranged outside the sealing body. In the direction from the valve stem to the valve ball, the sealing body extends out of the retaining ring, and the connecting surface between the retaining ring and the sealing body is inclined.

4. The safety valve according to claim 1, characterized in that: The adjusting assembly comprises an elastic seat, an elastic member and an adjusting member. At least a portion of the elastic seat extends into the working cavity and is connected to the valve body. The elastic seat is provided with an elastic hole which penetrates the seat along its axial direction. The valve stem is movably arranged in the elastic hole. The elastic member is sleeved on the outer side of the valve stem and abuts against the head of the valve stem. The adjusting member is sleeved on the end of the valve stem and abuts against the side of the elastic member away from the valve ball.

5. The safety valve according to claim 4, characterized in that: The regulating assembly further comprises a second sealing member, wherein the second sealing member is disposed between the valve stem and the elastic seat; and / or, The regulating assembly further comprises a third sealing member, wherein the third sealing member is arranged between the elastic seat and the valve body.

6. The safety valve according to claim 4, characterized in that: The adjusting component further comprises a first locking member, which is sleeved on the outside of the adjusting member and is used to lock the adjusting member.

7. The safety valve according to claim 6, characterized in that: The adjusting component further comprises a protective member, wherein the protective member is connected to a side of the elastic seat away from the valve ball, and the first locking member and the adjusting member are both located inside the protective member.

8. The safety valve according to claim 4, characterized in that: It also includes a second locking piece, which is inserted into the valve body and pressed against the elastic seat.

9. The safety valve according to claim 1, characterized in that: It also includes a valve sleeve, which is arranged in the working chamber corresponding to the liquid inlet channel, and the valve sleeve is provided with a sleeve hole extending along its axial direction, the valve ball is movably arranged in the sleeve hole, and at least a part of the valve stem is inserted in the sleeve hole.

10. The safety valve according to claim 9, characterized in that: The valve body is provided with a liquid outlet passage communicating with the working chamber, and the valve sleeve is provided with a pressure relief hole, which extends in the radial direction of the valve sleeve and communicates with the sleeve hole.

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