CN210484716U - Hydraulic safety valve - Google Patents

Abstract

The utility model provides a hydraulic safety valve, which comprises a valve body, a buffer part and a valve cover, wherein a connecting pipe used for being communicated with an oil storage tank is arranged in the valve body; an accommodating space with an opening is enclosed between the valve body and the connecting pipe, and the accommodating space is used for accommodating sealing oil; the buffer piece is located outside the valve body, and encloses the synthetic chamber that holds between buffer piece and the valve body, holds chamber and accommodation space intercommunication. The valve cover is fixedly connected with the valve body, the valve cover covers the opening, and the valve cover is provided with a first isolation part extending into the accommodating space. The utility model provides a fluid pressure type relief valve can be when the oil storage tank internal pressure risees for the liquid level that is located the space internal seal oil between first isolation and the valve body risees and gets into and hold the chamber, reduces the speed that the liquid level risees, avoids the outside of the splash play valve body of sealed oil, and causes the fluid pressure type relief valve to become invalid and can not play sealed function.

Description

Hydraulic safety valve

Technical Field

The utility model relates to a relief valve technical field especially relates to a fluid pressure type relief valve.

Background

The hydraulic safety valve belongs to one of safety accessories of the oil storage tank, is arranged at the top of the oil storage tank and is used for replacing a part for exhausting or deflating the oil storage tank by the mechanical breather valve when the mechanical breather valve breaks down so as to automatically control the opening and closing of an internal gas channel and an external gas channel of the oil storage tank, maintain the pressure balance of the oil storage tank, play a role in protecting the overpressure or the ultra-vacuum of the oil storage tank and reduce the evaporation loss of oil products within a certain range.

In the prior art, as shown in fig. 1 and 2, a hydraulic safety valve mainly includes a valve body 1 and a valve cover 3, wherein the valve body 1 has a connecting pipe 11 therein, the hydraulic safety valve is mounted on an oil storage tank through the connecting pipe 11, and an accommodating space 12 for storing sealing oil is formed between the connecting pipe 11 and the valve body 1; the bonnet 3 has a first partition 31 extending into the receiving space, so that an outer annular space is formed between the valve body 1 and the first partition 31, and an inner annular space is formed between the first partition 31 and the connecting pipe 11. When the pressure in the oil storage tank increases, the gas in the oil storage tank enters the inner ring space through the connecting pipe, the sealing oil is squeezed into the outer ring space, if the pressure continues to increase, the liquid level of the sealing oil in the inner ring space is level with the lower edge of the first isolation part, the gas in the oil storage tank passes through the lower edge of the isolation body and escapes into the atmosphere, and the pressure of the gas in the oil storage tank does not increase.

However, when the pressure in the oil storage tank is too high, the seal oil is easily sprayed to the outside of the safety valve, and the seal oil in the hydraulic safety valve is reduced, so that the sealing function cannot be achieved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fluid pressure type relief valve to solve among the prior art because of the oil storage tank internal pressure too big, cause the easy splash of sealed oil, sealed poor problem of effect.

The utility model provides a hydraulic safety valve, include: the valve body is internally provided with a connecting pipe communicated with an oil storage tank; and an accommodating space with an opening is enclosed between the valve body and the connecting pipe, and the accommodating space is used for accommodating sealing oil.

The buffer piece is located outside the valve body, the buffer piece and the valve body are surrounded to form an accommodating cavity, and the accommodating cavity is communicated with the accommodating space.

The valve cover, the valve cover with valve body fixed connection, the valve cover is established outside the opening, just the valve cover has and stretches into accommodation space's first isolation.

The hydraulic safety valve as described above, wherein the buffer includes a first connection section, a second connection section, and a third connection section connected in sequence; the second connecting section extends in a direction parallel to the axis of the connecting tube; one ends of the first connecting section and the third connecting section, which are far away from the second connecting section, are respectively connected with the valve body; the first connecting section, the second connecting section, the third connecting section and the valve body jointly enclose the accommodating cavity.

The hydraulic relief valve as described above, wherein a portion of the valve body facing the second connecting section is provided with at least one communication hole.

The hydraulic relief valve as described above, wherein at least one exhaust hole is further provided in a portion of the valve body facing the second connecting section, the exhaust hole being located on a side of the communication hole close to the opening.

The hydraulic safety valve as described above, wherein an oil collector is further disposed outside the valve body, and the oil collector is located between the buffer and the opening.

An oil collecting cavity is enclosed between the oil collecting piece and the valve body, and a liquid discharge hole for communicating the oil collecting cavity with the accommodating space is formed in the valve body.

The hydraulic relief valve as described above, wherein the oil trap includes a first section and a second section; the second section extends along the direction parallel to the axis of the connecting pipe; the first end of the first section, which deviates from the opening, is connected with the valve body, and the second end of the first section is connected with the second section.

The first section with the axis direction of valve body is predetermined contained angle, just the first section with the distance of valve body is from being close to open-ended one end is to deviating from open-ended one end diminishes gradually.

The liquid discharge hole is formed in the position, close to the first end, of the valve body.

The hydraulic relief valve as described above, wherein the number of the drain holes is plural, and the plural drain holes are spaced apart from each other in the circumferential direction of the valve body.

The hydraulic safety valve as described above, wherein the bonnet has a second partition portion fitted around the first partition portion; one end of the second isolation part, which deviates from the opening, extends into the oil collecting cavity.

The hydraulic safety valve further comprises a detection tube and a tube cap connected to the detection tube, the detection tube is connected to the valve body and communicated with the accommodating space, and a joint of the detection tube and the valve body is located at one end, away from the opening, of the buffer member.

The hydraulic safety valve as described above, wherein a blowoff valve is further provided at a bottom of the valve body facing away from the opening.

The utility model provides a hydraulic safety valve, which comprises a valve body, a buffer part and a valve cover, wherein a connecting pipe used for being communicated with an oil storage tank is arranged in the valve body; an accommodating space with an opening is enclosed between the valve body and the connecting pipe, and the accommodating space is used for accommodating sealing oil. The buffer piece is located outside the valve body, and encloses the synthetic chamber that holds between buffer piece and the valve body, holds chamber and accommodation space intercommunication. The valve cover is fixedly connected with the valve body, the valve cover covers the opening, and the valve cover is provided with a first isolation part extending into the accommodating space. When the pressure in the oil storage tank rises, the liquid level of the sealing oil in the space between the first isolation part and the valve body rises to enter the accommodating cavity, the rising speed of the liquid level is reduced, and the hydraulic safety valve is prevented from splashing outside the valve body, so that the hydraulic safety valve fails to have a sealing function.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a state of use diagram of a hydraulic relief valve provided in the prior art;

FIG. 2 is another state of use diagram of a hydraulic relief valve provided in the prior art;

fig. 3 is a perspective view of the hydraulic safety valve provided by the present invention;

fig. 4 is a half sectional view of the hydraulic safety valve provided by the present invention;

fig. 5 is a schematic view of a part of the structure of the hydraulic safety valve provided by the present invention;

fig. 6 is a schematic structural diagram of a valve cover of the hydraulic safety valve provided by the present invention.

Description of reference numerals:

1: a valve body;

11: a connecting pipe;

12: an accommodating space;

13: a communicating hole;

14: an exhaust hole;

15: a drain hole;

2: a buffer member;

21: a first connection section;

22: a second connection section;

23: a third connection section;

24: an accommodating chamber;

3: a valve cover;

31: a first isolation section;

32: a second isolation portion;

4: an oil collecting member;

41: a first stage;

42: a second stage;

43: an oil collecting cavity;

5: a detection tube;

6: a pipe cap;

7: a blowoff valve;

8: a connecting member;

9: a liquid level meter.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

In the case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In the prior art, a hydraulic safety valve is used as one of safety accessories of an oil storage tank, and fig. 1 is a using state diagram of the hydraulic safety valve provided in the prior art; FIG. 2 is another state of use diagram of a hydraulic relief valve provided in the prior art; referring to fig. 1 and 2, a hydraulic safety valve of the prior art mainly includes a valve body 1 and a bonnet 3 fixed on the valve body, wherein a connecting pipe 11 is provided in the valve body 1, and a receiving space 12 for storing sealing oil is configured between the connecting pipe 11 and the valve body 1; the valve cover 3 is provided with a first isolation portion 31 extending into the accommodating space by a predetermined distance to divide the accommodating space into an inner ring space and an outer ring space, wherein the inner ring space is a space enclosed between the first isolation portion and the connecting pipe, and the outer ring space is a space enclosed between the first isolation portion and the valve body. The hydraulic safety valve has the function of air release or air suction, when the pressure in the oil storage tank increases, the air release process of the hydraulic safety valve is realized, as shown in figure 1, the gas in the oil storage tank enters the inner ring space through the connecting pipe, the sealing oil is squeezed into the outer ring space, if the pressure continues to increase, the liquid level in the inner ring space and the lower edge of the first isolation part are in the same level, the gas in the oil storage tank is communicated with the lower edge of the first isolation part and escapes into the atmosphere, and the pressure in the oil storage tank does not increase any more. When the pressure in the oil storage tank is reduced, the hydraulic safety valve realizes the air suction process, and as shown in fig. 2, when negative pressure occurs in the oil storage tank, the sealing oil in the outer ring space is squeezed into the inner ring space by atmosphere, and when the liquid level in the outer ring space is level with the lower edge of the first isolation part, air enters the oil storage tank, so that the pressure in the oil storage tank is not reduced.

Based on the too high pressure in the oil storage tank, the splash of liquid seal oil easily takes place, reduces the technical problem of the sealed effect of fluid pressure type relief valve, this embodiment provides a fluid pressure type relief valve.

Fig. 3 is a perspective view of the hydraulic safety valve provided by the present invention; fig. 4 is a half sectional view of the hydraulic safety valve provided by the present invention; fig. 5 is a schematic view of a part of the structure of the hydraulic safety valve provided by the present invention; fig. 6 is a schematic structural diagram of a valve cover of the hydraulic safety valve provided by the present invention.

Referring to fig. 3 to 6, the present invention provides a hydraulic safety valve, which includes a valve body 1, a buffer member 2 and a valve cover 3, wherein a connecting pipe 11 for communicating with an oil storage tank is disposed in the valve body 1; an accommodating space 12 with an opening is enclosed between the valve body 1 and the connecting pipe 11, and the accommodating space 12 is used for accommodating sealing oil; the buffer member 2 is positioned outside the valve body 1, an accommodating cavity 24 is enclosed between the buffer member 2 and the valve body 1, and the accommodating cavity 24 is communicated with the accommodating space 12; the valve cover 3 is fixedly connected with the valve body 1, the valve cover 3 covers the opening, and the valve cover 3 is provided with a first isolation part 31 extending into the accommodating space 12.

Specifically, the hydraulic safety valve can be applied to the field of mechanical engineering, especially can be applied to the field of oil exploitation, and can be installed at the top of an oil storage tank and used for replacing a component for exhausting or deflating the oil storage tank by the mechanical breather valve when the mechanical breather valve breaks down, so that the opening and closing of an inner gas channel and an outer gas channel of the oil storage tank are automatically controlled, the pressure balance of the oil storage tank is maintained, the overpressure or the ultra-vacuum of the oil storage tank is protected, and the evaporation loss of oil products can be reduced within a certain range.

The hydraulic safety valve can comprise a valve body 1 and a valve cover 3 connected with the valve body 1, wherein the valve body 1 can be connected with an oil storage tank so as to be used for discharging air in the oil storage tank or introducing air into the oil storage tank to ensure the pressure in the oil storage tank to be balanced.

The valve body 1 is used as a main body part of the hydraulic safety valve and is used for storing sealing oil and a carrier connected with an oil storage tank, a connecting pipe 11 is arranged in the valve body 1, the connecting pipe 11 is used for being communicated with the oil storage tank, wherein the connecting mode of the connecting pipe 11 and the oil storage tank can adopt conventional fixed connection or detachable connection, for example, one end of the connecting pipe 11, which is close to the oil storage tank, is provided with a flange, and the valve body 1 can be fixed on the oil storage tank through bolts; an accommodating space 12 with an opening is formed between the valve body 1 and the connecting pipe 11 in a surrounding mode, the accommodating space 12 is used for accommodating sealing oil, and the sealing oil can prevent oil gas in the oil storage tank from overflowing out of a hydraulic safety valve, so that oil gas loss is caused, and meanwhile potential safety hazards are increased; in addition, the shape of the valve body 1 can be selected in many ways, such as hollow cylindrical or square.

The valve cover 3 can be fixed on the valve body 1 and used for covering the opening, wherein the valve cover 3 can be directly fixed on the valve body 1 or indirectly fixed on the valve body 1.

The first isolation part 31 can be fixed on the valve cover 3 or detachably connected on the valve cover 3, wherein the first isolation part 31 extends into the accommodating space 12 for a predetermined distance, and a certain gap is formed between the end part of the first isolation part 31 departing from the valve cover 3 and the bottom part of the valve body 1 departing from the opening, so that the flow of sealing oil and air is convenient, the accommodating space 12 is divided into an inner ring space and an outer ring space by the first isolation part 31, the inner ring space is a space enclosed between the first isolation part 31 and the connecting pipe 11, and the outer ring space is a space enclosed between the first isolation part 31 and the valve body 1; in addition, the structure of the first isolation portion 31 may have various forms, for example, an annular plate-shaped body, and furthermore, the extending direction of the first isolation portion may be parallel to the axial direction of the connection pipe, or may have a predetermined angle with the axial direction of the connection pipe, and the specific structure and arrangement may be designed according to actual situations.

The buffer member 2 may be fixed outside the valve body 1, so that an accommodating cavity 24 is defined between the buffer member 2 and the valve body 1, and the accommodating cavity 24 is communicated with the accommodating space 12. The buffer part 2 can be welded on the valve body 1, and the shape of the buffer part 2 can be matched with that of the valve body 1; the inlet can be opened just to the position of the buffer piece 2 in the valve body 1 to realize the communication between the accommodating cavity and the accommodating space, and the shape of the inlet can have various shapes, and can be an arc-shaped hole or a round hole. In addition, in the initial state, the liquid level of the sealing oil in the accommodating space is lower than the joint of the buffer piece and the valve body, when the pressure in the oil storage tank rises, the liquid level of the sealing oil in the accommodating space 12 rises to enter the accommodating cavity 24, the rising rate of the liquid level of the sealing oil is reduced, and the function of buffering the rising rate of the sealing oil is achieved.

When the pressure in the oil storage tank risees, be arranged in the oil storage tank gas can get into in the inner ring space along the connecting pipe, the liquid that is arranged in the inner ring space seals oil and receives gaseous pressure, the liquid level begins to descend, and simultaneously, the liquid level that is arranged in the liquid that seals oil in outer loop space begins to rise, and enter and hold the chamber, along with the liquid level that seals oil in the inner ring space continues to descend until deviating from open-ended edge parallel and level with first isolation, during gaseous can deviate from open-ended edge entering outer ring space along first isolation, discharge to the air through the opening at last, make the pressure in the oil storage tank reach the equilibrium.

The setting that the bolster was passed through to the fluid pressure type relief valve that this embodiment provided, when the oil storage tank internal pressure risees, make the liquid level that is located the outer loop space between first isolation portion and the valve body in the sealed oil risees and get into and hold the chamber, reduce the speed that the liquid level risees, avoid the outside of the splash play valve body of sealed oil, and cause the fluid pressure type relief valve to lose efficacy and can not play sealed function, cause in the oil gas discharges to the air through the fluid pressure type relief valve in the oil storage tank, also increased the potential safety hazard when causing the oil gas loss.

Further, as an embodiment of the buffer member, the buffer member 2 includes a first connection section 21, a second connection section 22, and a third connection section 23 connected in sequence; the second connecting section 22 extends in a direction parallel to the axis of the connecting tube 11; one ends of the first connecting section 21 and the third connecting section 23, which are far away from the second connecting section 22, are respectively connected with the valve body 1; the first connecting section 21, the second connecting section 22, the third connecting section 23 and the valve body 1 together enclose an accommodating cavity 24.

Specifically, the buffer member 2 may include a first connection section 21, a second connection section 22, and a third connection section 23 connected in sequence, and the buffer member 2 may be integrally formed or may be formed separately. The second connecting section 22 may extend along a direction parallel to the axis of the connecting pipe 11, or the extending direction of the second connecting section 22 may intersect with the axis of the connecting pipe 11; the second connecting section 22 may be a plate-shaped structure, and when the valve body 1 is cylindrical, the shape of the second connecting section 22 may match the shape of the valve body 1, and is an annular plate-shaped body. The end of the second connecting section 22 close to the opening can be connected to the third connecting section 23, and the end of the second connecting section 22 facing away from the opening can be connected to the first connecting section 21.

One end of the first connecting section 21 and the end of the third connecting section 23 departing from the second connecting section 22 are connected to the valve body 1, taking the connection relationship between the first connecting section 21 and the valve body 1 as an example, the extending direction of the first connecting section 21 may have a preset angle with the axis direction of the connecting pipe 11, preferably, the preset angle may be 90 degrees, that is, the first connecting section 21 may extend along the direction perpendicular to the axis of the connecting pipe 11, and the first connecting section 21 deviates from the opening, which may both ensure the volume in the accommodating cavity and facilitate the smooth flow of the sealing oil in the accommodating space, and the connection relationship between the third connecting section 23 and the valve body 1 is the same as the connection relationship between the first connecting section 21 and the valve body 1.

Further, a portion of the valve body 1 facing the second connecting section 22 is provided with at least one communication hole 13. Specifically, the communication hole 13 may be provided on the valve body 1, and when the pressure of the oil tank is balanced, the liquid level of the seal oil is flush with the edge of the communication hole away from the opening, and when the pressure of the oil tank is increased, the liquid level of the seal oil rises so that the seal oil located in the accommodating space enters the accommodating chamber via the communication hole, and when the pressure of the oil tank is balanced again, the seal oil flows back into the accommodating space via the communication hole. Preferably, the communication hole 13 is provided near the connection of the first connection section 21 and the valve body 1, the number of the communication holes 13 is multiple, and the plurality of communication holes 13 are distributed at intervals along the circumferential direction of the valve body 1, so that when the liquid level of the sealing oil rises, the sealing oil can rapidly flow into the accommodating chamber through the communication holes, and the rising speed of the liquid level of the sealing oil is reduced.

Further, at least one exhaust hole 14 is further provided on a portion of the valve body 1 facing the second connecting section 22, and the exhaust hole 14 is located on a side of the communicating hole 13 close to the opening. Specifically, the vent hole 14 may be provided on the valve body 1, which may prevent the air pressure in the accommodation chamber 24 from rising, and reduce the fluidity of the sealing oil. Preferably, the exhaust hole 14 is close to the junction setting of third linkage segment 23 and valve body 1, and the quantity of exhaust hole 14 is a plurality of, and a plurality of exhaust holes 14 are along the circumferencial direction interval distribution of valve body 1, can will hold the intracavity air and discharge fast and guarantee the mobility of sealing oil.

Further, in another embodiment, an oil collecting element 4 is further arranged outside the valve body 1, and the oil collecting element 4 is positioned between the buffer element 2 and the opening; an oil collecting cavity 43 is enclosed between the oil collecting piece 4 and the valve body 1, and a liquid discharge hole 15 for communicating the oil collecting cavity 43 with the accommodating space 12 is arranged on the valve body 1.

Specifically, the oil collecting piece 4 can be connected outside the valve body 1, can be integrally processed and formed with the valve body or can be of a split structure, and when the oil collecting piece is used as a single component, the oil collecting piece can be fixed outside the valve body in a welding mode; enclose synthetic oil collecting chamber 43 between oil collecting member 4 and the valve body 1 for make the sealed oil that the air carried or the sealed oil that splashes out the valve body fall into oil collecting chamber 43 in, and make sealed oil flow back to the valve body 1 in through setting up drain hole 15 on the valve body 1, make sealed oil can cyclic utilization, practice thrift the operation maintenance cost.

Optionally, the number of the liquid discharge holes 15 formed in the valve body 1 may be one or multiple, the plurality of liquid discharge holes 15 may be distributed at intervals along the circumferential direction of the valve body 1, or may be randomly distributed on the valve body 1, and the arrangement of the plurality of liquid discharge holes 15 may accelerate the backflow speed of the sealing oil. The embodiment is not limited, and the oil can be collected in the oil collecting cavity as long as the oil can timely flow back into the liquid sealing cylinder through the liquid discharge hole.

Further, as an embodiment of the oil collector, the oil collector 4 includes a first section 41 and a second section 42; the second section 42 extends in a direction parallel to the axis of the connecting tube 11; a first end of the first section 41 facing away from the opening is connected to the valve body 1, and a second end of the first section 41 is connected to the second section 42; the first section 41 and the axial direction of the valve body 1 form a preset included angle, and the distance between the first section 41 and the valve body 1 is gradually reduced from one end close to the opening to one end far away from the opening; a drain hole 15 is provided at a position of the valve body 1 near the first end.

Specifically, the oil collecting element 4 may include a first section 41 and a second section 42 connected to the first end, the second section 42 may extend in a direction parallel to the axis of the connecting pipe 11, and the second section 42 may be an annular plate-shaped body that matches the shape of the valve body 1, that is, an annular plate-shaped body that is sleeved outside the valve body 1, or a square structure that is formed by four plate-shaped bodies; it will be understood that the end of the first section 41 facing away from the opening is defined as a first end, the other end of the first section is defined as a second end, and the first end and the valve body, and the second end and the second section can be connected by welding.

Further, first section 41 is predetermined contained angle with the axis direction of valve body 1 for first section slope setting, preferably, the distance of first section 41 and valve body reduces from being close to open-ended one end to deviating from open-ended one end gradually like this, and first section and the axis direction of valve body are the acute angle promptly, can be convenient for the sealing oil that splashes to in the oil collecting cavity slide down to the junction of first section and valve body along the first section of slope, and flow back to accommodation space 12 through outage 15 fast, can design according to actual conditions as to the size of predetermined contained angle.

Further, when the bonnet 3 is indirectly fixed on the valve body 1, at least one connecting member 8 may be disposed on the second section 42, the connecting member 8 is fixedly connected with the bonnet 3 through a bolt, so as to achieve connection between the bonnet 3 and the valve body 1, the number of the connecting members 8 is plural, the plural connecting members 8 are spaced apart along the circumferential direction of the second section 42, and preferably, the number of the connecting members 8 is 3.

Further, the drain hole 15 is provided at a position of the valve body 1 near the first end, so that even a small amount of the sealing oil splashed into the oil collection chamber can quickly flow back into the accommodation space.

Further, in another embodiment, the valve cover 3 has a second partition 32 that is fitted over the first partition 31; the end of the second partition 32 facing away from the opening projects into the oil collection chamber 43.

Specifically, the valve cover 3 is further provided with a second isolation portion 32, one end of the second isolation portion 32, which is away from the opening, extends into the oil collecting cavity 43, and is away from the bottom of the opening by a predetermined distance with the oil collecting piece 4, so that air or oil gas forms a direction similar to a U shape in the oil collecting cavity, when the sealing oil of the valve body at the splashing position or the sealing oil carried by the air or the oil gas is in the transmission process, the sealing oil can touch the side face, which is close to the valve body 1, of the second isolation portion 32, the sealing oil can flow back to the oil collecting cavity along the second isolation portion 32 under resistance, and then falls back to the accommodating space 12 through the liquid discharge hole 15, the loss of the sealing oil is further reduced, the sealing performance of the hydraulic safety valve is improved, and the phenomenon that excessive oil gas overflows through the hydraulic safety valve is prevented.

Further, in another embodiment, the hydraulic safety valve further includes a detection tube 5 and a tube cap 6 connected to the detection tube, the detection tube 5 is connected to the valve body 1 and is communicated with the accommodating space 12, and a connection point of the detection tube 5 and the valve body 1 is located at an end of the buffer member 2 away from the opening.

Specifically, the hydraulic safety valve further includes a detection tube 5 for detecting the level of the sealing oil and a cap 6 connected to the detection tube, wherein the detection tube 5 is connected to the valve body 1, and the connection mode between the detection tube 5 and the valve body 1 has various options, such as: the detection tube 5 can be welded on the valve body 1, for example, the detection tube 5 can be screwed on the valve body 1, namely, an external thread is formed outside the detection tube, and an internal thread matched with the external thread is formed on the valve body, so that the detection tube is convenient to mount and dismount, and the convenience is improved; the cap 6 may be engaged with an end of the detection tube 5 opposite to the valve body, or may be screwed to the detection tube 5.

Further, the sense tube 5 is linked together with accommodation space 12, and the junction of sense tube 5 and valve body 1 is located bolster 2 and deviates from open-ended one end, can open pipe cap 6, the height through liquid level in the sense tube 5 is judged and is located accommodation space 12 well liquid level, the intuition nature has been increased, moreover, can set up the through-hole on the valve gap 3, level gauge 9 is designed to the through-hole inside callipers, the sealed oil liquid level height of judgement that like this can be more accurate, avoid sealed oil too little, cause the inefficacy of fluid pressure type relief valve.

Further, a drain valve 7 is arranged at the bottom of the valve body 1 facing away from the opening. Specifically, blowoff valve 7 can set up and deviate from the open-ended bottom at valve body 1, because carry a certain amount of moisture or other impurity in air or the oil gas, can get into in the valve body at the process of transmission, form comdenstion water or other impurity, cause the pollution of sealing oil, reduce the leakproofness of fluid pressure type relief valve, consequently, design through the blowoff valve can discharge comdenstion water or other impurity to the outside of valve body at any time, the clean time of maintenance has been reduced, the operation maintenance cost has been practiced thrift.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description above, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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.

Claims (10)

1. A hydraulic safety valve is characterized by comprising

The valve body is internally provided with a connecting pipe communicated with an oil storage tank; an accommodating space with an opening is enclosed between the valve body and the connecting pipe, and the accommodating space is used for accommodating sealing oil;

the buffer piece is positioned outside the valve body, an accommodating cavity is enclosed between the buffer piece and the valve body, and the accommodating cavity is communicated with the accommodating space;

the valve cover, the valve cover with valve body fixed connection, the valve cover is established outside the opening, just the valve cover has and stretches into accommodation space's first isolation.

2. The hydraulic safety valve of claim 1, wherein the cushion member includes a first connecting section, a second connecting section, and a third connecting section connected in series; the second connecting section extends in a direction parallel to the axis of the connecting tube; one ends of the first connecting section and the third connecting section, which are far away from the second connecting section, are respectively connected with the valve body; the first connecting section, the second connecting section, the third connecting section and the valve body jointly enclose the accommodating cavity.

3. The hydraulic safety valve of claim 2, wherein the portion of the valve body facing the second connecting section is provided with at least one communication hole.

4. The hydraulic relief valve according to claim 3, wherein the portion of the valve body facing the second connecting section is further provided with at least one exhaust hole on a side of the communication hole adjacent to the opening.

5. The hydraulic safety valve of any one of claims 1 to 4, wherein an oil trap is further disposed outside the valve body between the bumper and the opening;

an oil collecting cavity is enclosed between the oil collecting piece and the valve body, and a liquid discharge hole for communicating the oil collecting cavity with the accommodating space is formed in the valve body.

6. The hydraulic safety valve of claim 5, wherein the oil trap includes a first section and a second section;

the second section extends along the direction parallel to the axis of the connecting pipe; a first end of the first section, which is far away from the opening, is connected with the valve body, and a second end of the first section is connected with the second section;

the first section and the axial direction of the valve body form a preset included angle, and the distance between the first section and the valve body is gradually reduced from one end close to the opening to one end far away from the opening;

the liquid discharge hole is formed in the position, close to the first end, of the valve body.

7. The hydraulic relief valve according to claim 6, wherein the drain hole is provided in plural numbers, and the plural drain holes are spaced apart in a circumferential direction of the valve body.

8. The hydraulic safety valve of claim 5, wherein the bonnet has a second partition that fits over the first partition; one end of the second isolation part, which deviates from the opening, extends into the oil collecting cavity.

9. The hydraulic safety valve of any one of claims 1 to 4, further comprising a sensing tube connected to the valve body and communicating with the receiving space, and a cap connected to the sensing tube, wherein the connection point of the sensing tube and the valve body is located at an end of the cushion member facing away from the opening.

10. The hydraulic safety valve of claim 9, wherein a blow-down valve is further provided at a bottom of the valve body facing away from the opening.

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