CN209622059U - Sampling valve - Google Patents

Abstract

The utility model discloses a kind of sampling valves, belong to field of petroleum exploitation.The sampling valve includes: that the second valve rod (3) and plug (4) are connect with the first valve rod (2), the first end of first valve rod (2) and the first end (31) of the second valve rod (3) are respectively positioned in the first through hole that valve body (1) is arranged in the axial direction, the second end (32) of second valve rod (3) is located at except the first end (11) of valve body (1), and the second valve rod (3) is threadedly coupled with valve body (1)；The diameter of first valve rod (2) is less than the aperture of first through hole；Space between the end face of the second end (12) of valve body (1) and the side wall of plug (4) is used to be provided with leakage fluid dram (111) on the position of the first end (11) of valve body (1) on the side wall of valve body (1) in liquid input valve body (1) in oil pipe.Sampling valve in the utility model may be implemented to sample at any time, and sampling efficiency is higher.

Description

Sampling valve

Technical field

The utility model relates to field of petroleum exploitation more particularly to a kind of sampling valves.

Background technique

Both understand for the ease of technical staff and produce comprising oil or comprising water in the liquid (being commonly called as production fluid) being output from oil well Oil content in liquid out, the sample for needing first to take out production fluid from the oil pipe that the well head with the oil well is connect (referred to as sample), Then aqueous chemical examination is carried out to obtain the water content in the production fluid to the sample, can determined therefrom that in the production fluid later Oil content.

Currently, often one end of pipe nipple is welded on the side wall of the oil pipe when being sampled from oil pipe, by the another of pipe nipple End is connect with the first connector of valve, and the second connector of elbow and valve is connected.Valve is opened, the liquid in the oil pipe can To be flowed out by pipe nipple, valve and elbow, to realize sampling.

However, due to being connected with pipe nipple between oil pipe and valve, so after sampling terminates and closes valve, in pipe nipple Residual liquid can be full of.When ambient temperature is lower, these liquid remained in pipe nipple are easy to be frozen, at this time if Valve is opened, the liquid in the oil pipe will be not easy to flow through from pipe nipple, to will lead to sampling failure.In this case, only Have and pour hot water on pipe nipple, could be sampled after the liquid in pipe nipple melts, sampling efficiency is lower.

Utility model content

The utility model provides a kind of sampling valve, can solve the low problem of sampling efficiency in the related technology.The skill Art scheme is as follows:

On the one hand, a kind of sampling valve is provided, the sampling valve includes: valve body, the first valve rod, the second valve rod and plug；

The valve body is provided with first through hole in the axial direction, and the of the first end of first valve rod and second valve rod The first end of one end connection, the first end of first valve rod and second valve rod is respectively positioned in the first through hole, described The second end of second valve rod is located at except the first end of the valve body, close to second valve rod on the side wall of second valve rod First end position on be provided with the first external screw thread, on the inner wall of the valve body on the position of the first end of the valve body The first internal screw thread, second valve rod and the valve body is provided with to carry out by first external screw thread and first internal screw thread It is threadedly coupled；

The diameter of first valve rod is less than the aperture of the first through hole, and the second end of first valve rod is blocked up with described The first end connection of head, the plug is located at except the second end of the valve body, the size of the second end of the plug be greater than or Equal to the size of the second end of the valve body, the angle between the side wall of the plug and the side wall of first valve rod is first Angle, the angle between the end face of the second end of the valve body and the inner wall of the valve body are the second angle, second angle It is equal with first angle, and second angle and first angle are obtuse angle；

Position in the outer wall of the valve body between the first end and second end of the valve body is used for and sets on oil pipe The box cupling connection set, the space between the end face of the second end of the valve body and the side wall of the plug is used for will be in the oil pipe Liquid input in the valve body, be provided with drain on the position of the first end of the valve body on the side wall of the valve body Mouthful, the leakage fluid dram is for being discharged the intracorporal liquid of the valve.

Optionally, second valve rod includes first part and second part, and the of the first part of second valve rod One end is connect with the first end of first valve rod, and the second end of the first part of second valve rod is located at the of the valve body Except one end, the second part of second valve rod is set in the first part of second valve rod close to second valve rod First part first end position on, the described first outer spiral shell is provided on the outer wall of the second part of second valve rod Line.

Optionally, it is provided on the position in the outer wall of the valve body between the first end and second end of the valve body Second external screw thread, the valve body by second external screw thread with the box cupling for being threadedly coupled, and the sampling valve is also Including locking nut；

The second internal screw thread is provided on the locking nut, the locking nut and the valve body pass through the described second outer spiral shell Line is threadedly coupled with second internal screw thread, and the locking nut can be contacted with the box cupling.

Optionally, the first end of second valve rod is provided with blind hole in the axial direction, is provided on the side wall of the blind hole Two opposite the second through-holes of position are provided with third through-hole in the first end of first valve rod, and the sampling valve further includes Fixed pin；

The first end of first valve rod is located in the blind hole, and the fixed pin passes through described two second through-holes and institute State third through-hole.

Optionally, the sampling valve further include: handle；

The handle is connect with the second end of second valve rod, and the handle is for rotating second valve rod.

Optionally, first is provided on the position of the second end of second valve rod on the side wall of second valve rod Outer, the sampling valve further include: handwheel and nut；

The handwheel and the nut are set on second valve rod, outside the first end of the handwheel and described first Along contact, the second end of the handwheel is contacted with the nut, and the handwheel is for rotating second valve rod.

Optionally, the sampling valve further include: pressure cap；

The pressure cap is set on second valve rod, is provided with the second outer in the first end of the pressure cap, and described Two outers are fastened in the first end of the valve body, and the second end of the pressure cap is connect with the inner wall of the valve body.

Optionally, third outer, institute are provided on the position of the first end of the valve body on the inner wall of the valve body State sampling valve further include: sealing ring；

The sealing ring is folded between the side wall of second valve rod and the inner wall of the valve body, and the of the sealing ring One end is contacted with the third outer, the second end in contact of the second end of the sealing ring and the pressure cap.

Optionally, it is arranged on the position of the first end of the valve body on the outer wall of the valve body fluted.

Technical solution provided by the utility model can at least bring it is following the utility model has the advantages that in the utility model embodiment, When between the first end and second end for being located at valve body in the outer wall by valve body position and oil pipe on the box cupling that is arranged connect after, The second end and plug of valve body will be respectively positioned in oil pipe.When needing to sample by the sampling valve, second can be rotated with positive direction The second end of valve rod keeps the first valve rod and plug mobile to the direction of the first end far from valve body.When plug is to far from valve body When the side wall that the direction of first end is moved to plug is no longer contacted with the end face of the second end of valve body, liquid in oil pipe can be from Space between the end face of the second end of valve body and the side wall of plug flows into valve body.Then, flowing into the intracorporal liquid of valve can be with By being discharged from leakage fluid dram after the gap between the side wall of the first valve rod and the inner wall of valve body, so that technical staff is from drain It is sampled at mouthful.After sampling, the second end of the second valve rod can be rotated with opposite direction, make the first valve rod and plug to close to valve The direction of the first end of body is mobile.Valve body is stuck in the second end that the direction of the first end close to valve body is moved to plug when plug Second end on when, the side wall of plug can be bonded with the end face of the second end of valve body, at this point, the liquid in oil pipe will not flow into In valve body, so as to avoid the occurrence of liquid leakage phenomenon.It can be discharged from leakage fluid dram due to flowing into the intracorporal liquid of valve, so Few liquid can remain in the space between the side wall of the first valve rod and the inner wall of valve body.And due to working as the outer wall of valve body In be located at valve body first end and second end between position and oil pipe on be arranged box cupling connection after, the second end of valve body and Plug will be respectively positioned in oil pipe, and the liquid in oil pipe has certain temperature and is in flow regime always, even if so should Sampling valve is located in low temperature environment, there will not be liquid in the sampling valve and is frozen in, thus using the sampling valve may be implemented with When sample, sampling efficiency is higher.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings Obtain other attached drawings.

Fig. 1 is a kind of structural schematic diagram of sampling valve provided by the embodiment of the utility model；

Fig. 2 is the structural schematic diagram of another sampling valve provided by the embodiment of the utility model；

Fig. 3 is the structural schematic diagram of another sampling valve provided by the embodiment of the utility model.

Appended drawing reference:

1: valve body, 2: the first valve rods, 3: the second valve rods, 4: plug, 5: locking nut, 6: fixed pin, 7: handwheel, 8: spiral shell Cap, 9: pressure cap, 10: sealing ring, 11: the first end of valve body, 12: the second end of valve body, 13: the second external screw threads, 14: outside third Edge, the first end of 31: the second valve rods, the second end of 32: the second valve rods, the first part of 33: the second valve rods, 34: the second valve rods Second part, 35: the first outers, 41: the first end of plug, 42: the second end of plug, 91: the second outers, 92: pressure cap Second end, 111: leakage fluid dram, 112: groove.

Specific embodiment

It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer Type embodiment is described in further detail.

Fig. 1 is a kind of structural schematic diagram of sampling valve provided by the embodiment of the utility model, as shown in Figure 1, the sampling valve It include: valve body 1, the first valve rod 2, the second valve rod 3 and plug 4.Valve body 1 is provided with first through hole in the axial direction, the first valve rod 2 First end is connect with the first end 31 of the second valve rod 3, and the first end 31 of the first end of the first valve rod 2 and the second valve rod 3 is respectively positioned on In first through hole, the second end 32 of the second valve rod 3 is located at except the first end 11 of valve body 1, close to the on the side wall of the second valve rod 3 The first external screw thread is provided on the position of the first end 31 of two valve rods 3, the first end 11 of close valve body 1 on the inner wall of valve body 1 The first internal screw thread is provided on position, the second valve rod 3 carries out screw thread company by the first external screw thread and the first internal screw thread with valve body 1 It connects；The diameter of first valve rod 2 is less than the aperture of first through hole, and the second end of the first valve rod 2 is connect with the first end 41 of plug 4, The second end 42 of plug 4 is located at except the second end 12 of valve body 1, and the size of the second end 42 of plug 4 is greater than or equal to valve body 1 The size of second end 12, the angle between the side wall of plug 4 and the side wall of the first valve rod 2 are the first angle, the second end of valve body 1 Angle between 12 end face and the inner wall of valve body 1 is the second angle, and the second angle is equal with the first angle, and the second angle with First angle is obtuse angle；Position in the outer wall of valve body 1 between the first end 11 and second end 12 of valve body 1 is used for and oil The box cupling connection being arranged on pipe, the space between the end face of the second end 12 of valve body 1 and the side wall of plug 4 is used for will be in oil pipe Liquid inputs in valve body 1, is provided with leakage fluid dram 111, drain on the position of the first end 11 of valve body 1 on the side wall of valve body 1 Mouth 111 is for the liquid in exits valve body 1.

It should be noted that the structure of the first valve rod 2 and the structure of the second valve rod 3 all can be solid cylindrical body structures. The diameter of first valve rod 2 can be greater than the first valve rod 2 and second less than the diameter of the second valve rod 3, the aperture of first through hole The diameter of valve rod 3, as long as guaranteeing that the first end of the first valve rod 2 and the first end 31 of the second valve rod 3 can be located at first through hole It is interior, and the second valve rod 3 can be threadedly coupled with the first through hole in valve body 1, the side wall of the first valve rod 2 can be with valve body 1 Inner wall between there are gaps.Connection type between the first end of first valve rod 2 and the first end 31 of the second valve rod 3 can Think welding, threaded connection etc..Also, since the second valve rod 3 is threadedly coupled with the first through hole in valve body 1, so can To make the second valve rod 3 mobile to the direction of the second end 12 close to valve body 1 by the second valve rod 3 of rotation, plug 4 is then driven It is mobile to the direction of the first end 11 far from valve body 1；Alternatively, can make the second valve rod 3 to separate by the second valve rod 3 of rotation The direction of the second end 12 of valve body 1 is mobile, then drives plug 4 mobile to the direction of the first end 11 close to valve body 1.

In addition, the connection type between the first end 41 of plug 4 and the second end of the first valve rod 2 can be welding, screw thread Connection etc..The degree of angle between the side wall of plug 4 and the side wall of the first valve rod 2 can be for greater than 90 degree and less than 180 degree Any degree, the degree of the angle between the end face of the second end 12 of valve body 1 and the inner wall of valve body 1 may be greater than 90 degree And it is less than any degree of 180 degree, as long as guaranteeing that the angle between the side wall of plug 4 and the side wall of the first valve rod 2 is equal to valve body 1 The end face of second end 12 and the inner wall of valve body 1 between angle.Due to the side wall of the first valve rod 2 and the inner wall of valve body 1 In parallel, the size of the second end 42 of plug 4 is greater than or equal to the size of the second end 12 of valve body 1, the first angle and the second angle It is obtuse angle and equal, it is possible to rotate the second valve rod 3 to make the first valve rod 2 and plug 4 to the first end 11 close to valve body 1 Direction it is mobile, until the second end 42 of plug 4 is stuck in the second end 12 of valve body 1, the side wall of plug 4 can be with the of valve body 1 The end face at two ends 12 is bonded, at this point, there is no gap, oil pipes between the end face of the second end 12 of the side wall of plug 4 and valve body 1 In liquid would not also flow into valve body 1.Alternatively, the second valve rod 3 can be rotated to make the first valve rod 2 and plug 4 to separate The direction of the second end 12 of valve body 1 is mobile, until there are gap between the end face of the second end 12 of the side wall and valve body 1 of plug 4, At this point, the liquid in oil pipe can flow into valve body 1 from the gap between the end face of the second end 12 of the side wall and valve body 1 of plug 4 It is interior.

Furthermore it is arranged on the position and oil pipe in the outer wall of valve body 1 between the first end 11 and second end 12 of valve body 1 Box cupling between connection type can for welding, be threadedly coupled etc..Specific portion in the outer wall of valve body 1 for being connect with box cupling Position can be arranged according to the length of the diameter of oil pipe and box cupling, as long as guaranteeing the first end for being located at valve body 1 in the outer wall of valve body 1 After position between 11 and second end 12 is connect with box cupling, the second end 12 of valve body 1 and the second end 42 of plug 4 can positions In in oil pipe.In practical applications, the liquid at the tubing wall is often more sticky, positioned at the center position of oil pipe Liquid relatively actual conditions, so, it, can be by the outer wall of valve body 1 in order to make the sample taken out be more nearly actual conditions In be located at valve body 1 first end 11 and second end 12 between position connect with box cupling after, make valve body 1 second end 12 and block up First 4 second end 42 is respectively positioned on the center position of oil pipe.

Finally, the size of leakage fluid dram 111 can be arranged according to actual needs.In practical applications, in order to make enter valve Liquid in body 1 can be smoothly discharged, and the position of leakage fluid dram 111 can be set locating a lower height of one in the side wall of valve body 1 On side.In addition, one can be connected at leakage fluid dram 111 in order to avoid the sample generation splash when sampling from leakage fluid dram 111 Pipe nipple, one end connected drainage mouth 111 of pipe nipple, the other end of pipe nipple can be put in sampling container, in this way, in sampling, from The sample that leakage fluid dram 111 flows out can be flowed to directly in sampling container through pipe nipple, so as to effectively avoid sample that splash occurs.

It is worth noting that when the position between the first end 11 and second end 12 that will be located at valve body 1 in the outer wall of valve body 1 After connecting with the box cupling being arranged on oil pipe, the second end 12 and plug 4 of valve body 1 will be respectively positioned in oil pipe.It should when needing to pass through When sampling valve samples, the second end 32 of the second valve rod 3 can be rotated with positive direction, make the first valve rod 2 and plug 4 to far from valve body 1 First end 11 direction it is mobile.The side wall of plug 4 is moved to no longer to the direction of the first end 11 far from valve body 1 when plug 4 When contacting with the end face of the second end 12 of valve body 1, liquid in oil pipe can end face from the second end 12 of valve body 1 and plug 4 Side wall between space flow into valve body 1 in.Then, the liquid flowed into valve body 1 can pass through the side wall and valve of the first valve rod 2 It is discharged after gap between the inner wall of body 1 from leakage fluid dram 111, so that technical staff samples from leakage fluid dram 111.It is sampling After, the second end 32 of the second valve rod 3 can be rotated with opposite direction, make the first valve rod 2 and plug 4 to close to the first of valve body 1 The direction at end 11 is mobile.Valve is stuck in the second end 42 that the direction of the first end 11 close to valve body 1 is moved to plug 4 when plug 4 When in the second end 12 of body 1, the side wall of plug 4 can be bonded with the end face of the second end 12 of valve body 1, at this point, the liquid in oil pipe It will not flow into valve body 1, so as to avoid the occurrence of liquid leakage phenomenon.Since the liquid flowed into valve body 1 can be from drain It is discharged at mouth 111, so few liquid can remain in the space between the side wall of the first valve rod 2 and the inner wall of valve body 1.And Due to when by the outer wall of valve body 1 be located at valve body 1 first end 11 and second end 12 between position and oil pipe on be arranged connect After hoop connection, the second end 12 and plug 4 of valve body 1 will be respectively positioned in oil pipe, and the liquid in oil pipe has certain temperature And it is in flow regime always, even if there will not be liquid in the sampling valve and be frozen so the sampling valve is located in low temperature environment Firmly, thus using the sampling valve it may be implemented to sample at any time, sampling efficiency is higher.

Optionally, as shown in Fig. 2, the second valve rod 3 may include first part 33 and second part 34, the second valve rod 3 The first end of first part 33 is connect with the first end of the first valve rod 2, and the second end of the first part 33 of the second valve rod 3 is located at valve Except the first end 11 of body 1, the second part 34 of the second valve rod 3 is set in the first part 33 of the second valve rod 3 close to second On the position of the first end of the first part 33 of valve rod 3, the first outer spiral shell is provided on the outer wall of the second part 34 of the second valve rod 3 Line.

It should be noted that the first part 33 of the second valve rod 3 can be with the first valve rod 2 it is integrally formed, can also be with It is not integrally formed.When the first part 33 of the second valve rod 3 and the first valve rod 2 are not to be integrally formed, the of the second valve rod 3 Connection type between the first end and the first end of the first valve rod 2 of a part 33 can be to weld, be threadedly coupled.Second valve The structure of the second part 34 of bar 3 can be open column shape body structure.The internal diameter of the second part 34 of second valve rod 3 can be bigger The internal diameter of valve body 1 can be slightly less than in the outer diameter of the outer diameter of the first part 33 of the second valve rod 3, the second part 34 of the second valve rod 3, After if the second part 34 of the second valve rod 3 of guarantee is in the first part 33 for being set in the second valve rod 3 just, the second valve rod 3 second part 34 can be threadedly coupled just with the first through hole in valve body 1, and rotate the first of the second valve rod 3 When the second end of part 33, the second part 34 of the second valve rod 3 just can be with 33 turns of the first part of the second valve rod 3 It is dynamic.

Optionally, as shown in Figures 2 and 3, in the outer wall of valve body 1 between the first end 11 and second end 12 of valve body 1 Position on be provided with the second external screw thread 13, valve body 1 by the second external screw thread 13 with box cupling for being threadedly coupled, the sampling Valve can also include locking nut 5.The second internal screw thread is provided on locking nut 5, locking nut 5 and valve body 1 pass through outside second Screw thread 13 is threadedly coupled with the second internal screw thread, and locking nut 5 can be contacted with box cupling.

It should be noted that the internal diameter of locking nut 5 can be slightly larger than between the first end 11 and second end 12 of valve body 1 The outer diameter at position, as long as guaranteeing that locking nut 5 can be set in the position between the first end 11 of valve body 1 and second end 12 just On, and can be threadedly coupled just with the outer wall of valve body 1.

It is worth noting that locking nut 5 and valve body 1 are carried out screw thread company by the second external screw thread 13 and the second internal screw thread It connects, when valve body 1 is threadedly coupled by the second external screw thread 13 with box cupling, and makes the leakage fluid dram 111 being arranged on the side wall of valve body 1 Behind suitable position, locking nut 5 can be made along the second external screw thread 13 to the side close to box cupling with rotation lock nut 5 To movement.After locking nut 5, which is moved to, to be contacted with box cupling, valve body 1 will be not easy to rotate relative to box cupling, valve body 1 The position for the leakage fluid dram 111 being arranged on side wall is also just less likely to occur to change, and thereby may be ensured that the stabilization of sampling process.

Optionally, as shown in Figures 2 and 3, in order to realize the first end of the first valve rod 2 and the first end 31 of the second valve rod 3 Between connection, blind hole can be set in the axial direction, can be set on the side wall of the blind hole first end 31 of the second valve rod 3 Third through-hole has can be set in the first end of the first valve rod 2 in two opposite the second through-holes of position, which can also wrap Include fixed pin 6.The first end of first valve rod 2 is located in the blind hole, and fixed pin 6 passes through two the second through-holes and third through-hole.

It should be noted that the depth of the blind hole can be arranged according to actual needs, the aperture of the blind hole can be bigger In the diameter of the first valve rod 2, as long as guaranteeing that the first end of the first valve rod 2 can be located in the blind hole just.The two The apertures of two through-holes and the aperture of third through-hole can be slightly larger than the diameter of fixed pin 6, as long as guaranteeing that fixed pin 6 just can be with It is not specifically limited in this embodiment across the two second through-holes and third through-hole, the utility model embodiment.

Optionally, for the ease of rotating the second valve rod 3, in a kind of possible structure, which may include: hand Handle.Handle is connect with the second end 32 of the second valve rod 3, and handle is for rotating the second valve rod 3.

It should be noted that the shape of the cross section of handle can be rectangular, diamond shape, circle etc..The size of handle can be with It is arranged according to actual needs.Connection type between handle and the second end 32 of the second valve rod 3 can be welding, be threadedly coupled Deng.It, can be the of the second valve rod 3 when the connection type between handle and the second end 32 of the second valve rod 3 is to be threadedly coupled One through-hole is set on two ends 32, internal screw thread can be set on the through-hole, external screw thread can be set in the first end of handle, The first end of handle can be located in the through-hole and is threadedly coupled with the through-hole, to realize the of handle and the second valve rod 3 Connection between two ends 32.

In alternatively possible structure, as shown in Figures 2 and 3, close to the of the second valve rod 3 on the side wall of the second valve rod 3 The first outer 35 can be set on the position at two ends 32, which can also include: handwheel 7 and nut 8.Handwheel 7 and spiral shell Cap 8 is set on the second valve rod 3, and the first end of handwheel 7 is contacted with the first outer 35, and second end and the nut 8 of handwheel 7 connect Touching, handwheel 7 is for rotating the second valve rod 3.

It should be noted that the internal diameter of handwheel 7 can be slightly larger than the diameter of the second valve rod 3, as long as guaranteeing that handwheel 7 just may be used To be set on the second valve rod 3, and when rotation handwheel 7, the second valve rod 3 can rotate together just with handwheel 7.

In addition, outer spiral shell can be set on the position of the second end 32 of the second valve rod 3 on the side wall of the second valve rod 3 Line.The internal diameter of nut 8 can be slightly larger than the diameter of the second valve rod 3, as long as guaranteeing that nut 8 can be set in the second valve rod 3 just On, and can be threadedly coupled with the second valve rod 3.

It is worth noting that handwheel 7 and nut 8 are set on the second valve rod 3, by the first end of handwheel 7 and the second valve The first outer 35 contact being arranged on the position of the second end 32 of the second valve rod 3 on the side wall of bar 3, by the second of handwheel 7 End is contacted with nut 8, thus, it is possible to the limit to handwheel 7 be realized by the first outer 35 and nut 8, thus when rotation handwheel 7 When, position of the handwheel 7 on the side wall of the second valve rod 3 will not change, and then convenient for driving second by rotation handwheel 7 Valve rod 3 is rotated.

Optionally, as shown in Figures 2 and 3, in order to avoid enter valve body 1 in liquid out of the first external screw thread and first spiral shell Thread gaps between line and flow out the sampling valve, which can also include: pressure cap 9.Pressure cap 9 is set in the second valve rod 3 On, the second outer 91 is provided in the first end of pressure cap 9, the second outer 91 is fastened in the first end 11 of valve body 1, pressure cap 9 Second end 92 is connect with the inner wall of valve body 1.

It should be noted that the internal diameter of pressure cap 9 can be slightly larger than the diameter of the second valve rod 3, as long as guaranteeing that pressure cap 9 just may be used To be set on the second valve rod 3, and gap is not had between the inner wall of pressure cap 9 and the side wall of the second valve rod 3.Pressure cap 9 The outer diameter of second end 92 can be slightly less than the internal diameter of valve body 1, as long as guaranteeing that the second end 92 of pressure cap 9 is connect with the inner wall of valve body 1 Later, it there will not be gap between the second end 92 of pressure cap 9 and the inner wall of valve body 1.In this way, into the liquid in valve body 1 Both it will not be leaked between the inner wall of pressure cap 9 and the side wall of the second valve rod 3, it will not be from the second end 92 of pressure cap 9 and valve body 1 It is leaked between inner wall, to effectively prevent the leakage of liquid.

Optionally, as shown in Figures 2 and 3, in order to further avoid the liquid entered in valve body 1 from the first external screw thread and the Thread gaps between one internal screw thread leak and flow out the sampling valve, close to the portion of the first end 11 of valve body 1 on the inner wall of valve body 1 Third outer 14 can be set on position, which can also include: sealing ring 10.Sealing ring 10 is folded in the second valve rod 3 Side wall and valve body 1 inner wall between, the first end of sealing ring 10 is contacted with third outer 14, the second end and pressure of sealing ring 10 The second end 92 of cap 9 contacts.

It should be noted that the quantity of sealing ring 10 can be 1, it can be multiple.It is every at least one sealing ring 10 The outer diameter of a sealing ring 10 can be equal to or slightly less than the internal diameter of valve body 1, as long as guaranteeing that sealing ring 10 can be folded in the just Between the side wall of two valve rods 3 and the inner wall of valve body 1.In this way, both will not be out of sealing ring 10 into the liquid in valve body 1 It leaks, will not be leaked between the outer wall of sealing ring 10 and the inner wall of valve body 1 between wall and the side wall of the second valve rod 3, thus Effectively prevent the leakage of liquid.

In addition, the first end due to sealing ring 10 is contacted with third outer 14, the of the second end of sealing ring 10 and pressure cap 9 Two ends 92 contact, so position of the sealing ring 10 on the side wall of the second valve rod 3 will not change, so as to be effectively ensured The sealing effect of sealing ring 10.

Optionally, as shown in Figures 2 and 3, for the ease of valve body 1 to be connected on the box cupling being arranged on oil pipe, valve body 1 It can be set fluted 112 on the position of the first end 11 of valve body 1 on outer wall.

It should be noted that groove 112 can be on the outer wall of valve body 1 on the position of the first end 11 of valve body 1 Along the circle groove 112 of valve body 1 being arranged radially, the shape of the cross section of the depth and groove 112 of groove 112 can be according to reality Border needs to be arranged.For example, the angle between the side wall of groove 112 and the bottom of groove 112 can be obtuse angle.When use spanner When the box cupling being arranged on valve body 1 and oil pipe is threadedly coupled, the movable part of spanner can be placed on groove 112 It is interior, valve body 1 then is clamped with the movable part of spanner and is rotated, and valve body 1 is connected on box cupling.Due to the movable part of spanner In in groove 112, position of the movable part of spanner on the outer wall of valve body 1 can be limited quartile by the cell wall of groove 112, So spanner will not skid on the side wall of valve body 1, to improve valve body 1 during rotating valve body 1 by spanner The efficiency being connected on box cupling.

In the utility model embodiment, when between the first end 11 and second end 12 that will be located at valve body 1 in the outer wall of valve body 1 Position and oil pipe on be arranged box cupling connection after, the second end 12 and plug 4 of valve body 1 will be respectively positioned in oil pipe.Work as needs When being sampled by the sampling valve, the second end 32 of the second valve rod 3 can be rotated with positive direction, makes the first valve rod 2 and plug 4 to separate The direction of the first end 11 of valve body 1 is mobile.The side wall of plug 4 is moved to the direction of the first end 11 far from valve body 1 when plug 4 When no longer contacting with the end face of the second end 12 of valve body 1, liquid in oil pipe can be from the end face of the second end 12 of valve body 1 and stifled Space between first 4 side wall flows into valve body 1.Then, the liquid flowed into valve body 1 can pass through the side wall of the first valve rod 2 It is discharged after gap between the inner wall of valve body 1 from leakage fluid dram 111, so that technical staff samples from leakage fluid dram 111.In After sampling, the second end 32 of the second valve rod 3 can be rotated with opposite direction, make the first valve rod 2 and plug 4 to close to valve body 1 The direction of first end 11 is mobile.Block when plug 4 to the second end 42 that the direction of the first end 11 close to valve body 1 is moved to plug 4 When in the second end 12 of valve body 1, the side wall of plug 4 can be bonded with the end face of the second end 12 of valve body 1, at this point, in oil pipe Liquid will not flow into valve body 1, so as to avoid the occurrence of liquid leakage phenomenon.Since the liquid flowed into valve body 1 can be from It is discharged at leakage fluid dram 111, so few liquid can remain in the space between the side wall of the first valve rod 2 and the inner wall of valve body 1 It is interior.And due to that ought be arranged the position being located between the first end 11 and second end 12 of valve body 1 in the outer wall of valve body 1 and on oil pipe Box cupling connection after, the second end 12 and plug 4 of valve body 1 will be respectively positioned in oil pipe, and the liquid in oil pipe have it is certain Temperature and it is in flow regime always, even if there will not be liquid in the sampling valve so the sampling valve is located in low temperature environment It is frozen in, thus may be implemented to sample at any time using the sampling valve, sampling efficiency is higher.

The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (9)

1. a kind of sampling valve, which is characterized in that the sampling valve include: valve body (1), the first valve rod (2), the second valve rod (3) and Plug (4)；

The valve body (1) is provided with first through hole, the first end of first valve rod (2) and second valve rod in the axial direction (3) first end (31) connection, the first end of first valve rod (2) and first end (31) equal position of second valve rod (3) In in the first through hole, the second end (32) of second valve rod (3) is located at except the first end (11) of the valve body (1), The first outer spiral shell is provided on the position of the first end (31) of second valve rod (3) on the side wall of second valve rod (3) Line is provided with the first internal screw thread, institute on the position of the first end (11) of the valve body (1) on the inner wall of the valve body (1) It states the second valve rod (3) and is threadedly coupled with the valve body (1) by first external screw thread and first internal screw thread；

The diameter of first valve rod (2) be less than the first through hole aperture, the second end of first valve rod (2) with it is described The first end (41) of plug (4) connects, the second end (42) of the plug (4) be located at the valve body (1) second end (12) it Outside, the size of the second end (42) of the plug (4) is greater than or equal to the size of the second end (12) of the valve body (1), described Angle between the side wall of plug (4) and the side wall of first valve rod (2) is the first angle, the second end of the valve body (1) (12) angle between the inner wall of end face and the valve body (1) is the second angle, second angle and first angle It is equal, and second angle and first angle are obtuse angle；

Position in the outer wall of the valve body (1) between the first end (11) and second end (12) of the valve body (1) is used for It is connect with the box cupling being arranged on oil pipe, between the end face of the second end (12) of the valve body (1) and the side wall of the plug (4) Space is used to input the liquid in the oil pipe in the valve body (1), close to the valve body on the side wall of the valve body (1) (1) it is provided with leakage fluid dram (111) on the position of first end (11), the leakage fluid dram (111) is for being discharged in the valve body (1) Liquid.

2. sampling valve as described in claim 1, which is characterized in that

Second valve rod (3) includes first part (33) and second part (34), the first part of second valve rod (3) (33) first end is connect with the first end of first valve rod (2), and the second of the first part (33) of second valve rod (3) End is located at except the first end (11) of the valve body (1), and the second part (34) of second valve rod (3) is set in described second It is described in the first part (33) of valve rod (3) on the position of the first end of the first part (33) of second valve rod (3) First external screw thread is provided on the outer wall of the second part (34) of second valve rod (3).

3. sampling valve as described in claim 1, which is characterized in that positioned at the valve body (1) in the outer wall of the valve body (1) It is provided on position between first end (11) and second end (12) the second external screw thread (13), the valve body (1) is for passing through institute It states the second external screw thread (13) to be threadedly coupled with the box cupling, the sampling valve further includes locking nut (5)；

It is provided with the second internal screw thread on the locking nut (5), the locking nut (5) and the valve body (1) pass through described the Two external screw threads (13) are threadedly coupled with second internal screw thread, and the locking nut (5) can contact with the box cupling.

4. sampling valve as described in claim 1, which is characterized in that the first end (31) of second valve rod (3) is in the axial direction It is provided with blind hole, is provided with two opposite the second through-holes of position on the side wall of the blind hole, the first of first valve rod (2) Third through-hole is provided on end, the sampling valve further includes fixed pin (6)；

The first end of first valve rod (2) is located in the blind hole, the fixed pin (6) pass through described two second through-holes and The third through-hole.

5. sampling valve as described in claim 1, which is characterized in that the sampling valve further include: handle；

The handle is connect with the second end (32) of second valve rod (3), and the handle is for rotating second valve rod (3)。

6. sampling valve as described in claim 1, which is characterized in that close to described second on the side wall of second valve rod (3) The first outer (35), the sampling valve are provided on the position of the second end (32) of valve rod (3) further include: handwheel (7) and nut (8)；

The handwheel (7) and the nut (8) are set on second valve rod (3), the first end of the handwheel (7) and institute The first outer (35) contact is stated, the second end of the handwheel (7) is contacted with the nut (8), and the handwheel (7) is for rotating institute State the second valve rod (3).

7. sampling valve as described in claim 1, which is characterized in that the sampling valve further include: pressure cap (9)；

The pressure cap (9) is set on second valve rod (3), is provided with the second outer in the first end of the pressure cap (9) (91), second outer (91) is fastened in the first end (11) of the valve body (1), the second end (92) of the pressure cap (9) It is connect with the inner wall of the valve body (1).

8. sampling valve as claimed in claim 7, which is characterized in that close to the valve body (1) on the inner wall of the valve body (1) Third outer (14), the sampling valve are provided on the position of first end (11) further include: sealing ring (10)；

The sealing ring (10) is folded between the side wall of second valve rod (3) and the inner wall of the valve body (1), the sealing The first end of circle (10) is contacted with the third outer (14), and the of the second end of the sealing ring (10) and the pressure cap (9) Two ends (92) contact.

9. sampling valve as described in claim 1, which is characterized in that close to the valve body (1) on the outer wall of the valve body (1) Fluted (112) are set on the position of first end (11).